NEEDLING APPARATUS

The present application claims the priority of the Chinese patent application filed on Aug. 21, 2020 before the Chinese Patent Office with the application number of 202021761383.1 and the title of “NEEDLING APPARATUS”, which is incorporated herein in its entirety by reference.

TECHNICAL FIELD

The present disclosure relates to the technical field of processing of graphite products, and particularly relates to a needling device.

BACKGROUND

A graphite preform body is formed by weaving multiple layers of carbon-fiber cloth. In the weaving process, the carbon-fiber cloth is wrapped onto the graphite preform body layer by layer, and every time one layer of the carbon-fiber cloth has been wrapped, it is required to perform one round of needling to the graphite preform body, to cause the preform body to be compact.

In the prior art, a graphite preform body includes a revolution surface, a top face perpendicular to the revolution surface, and a circular-arc surface connecting the revolution surface and the top face. The circular-arc surface of the graphite preform body requires artificial needling. However, artificial needling easily results in uneven depth and density of the needling, which very easily results in deformation and layering of the graphite preform body during the deposition. Furthermore, artificial needling has a slow speed, and a low processing efficiency.

SUMMARY

In view of the above problems, the present disclosure is proposed to provide a needling device that overcomes the above problems or at least partially solve the above problems.

In order to solve the above problems, the present disclosure discloses a needling device, for processing a preform body, wherein the needling device includes: a needling assembly, a support, a base and a bearing frame;

- the base is provided inside the bearing frame, and the base is for bearing the preform body;
- the support is connected to the bearing frame, and the support is opposite to the base and the preform body; and
- the needling assembly is slidably connected to the support, and is for needling the preform body.

Optionally, the support is movably connected to the bearing frame.

Optionally, the support is provided with a guide rail, and the guide rail includes at least one circular-arc section.

Optionally, the needling assembly includes: a driving assembly, a needling head and a piercing needle;

the piercing needle is connected to the needling head, the needling head is connected to the driving assembly, and the needling head is slidably connected to the guide rail on the support; and

the driving assembly includes a first driving mechanism, the first driving mechanism is connected to the needling head, and the first driving mechanism is for driving the needling head to drive the piercing needle to needle the preform body.

Optionally, the driving assembly further includes a second driving mechanism, and the second driving mechanism is slidably connected to the guide rail on the support; and

the second driving mechanism is for driving the needling head to slide along the guide rail.

Optionally, the guide rail is provided with a rack; and

- the second driving mechanism includes an electric motor and a gear, the electric motor is rotatably connected to the gear, the gear is engaged with the rack, and the electric motor is for driving the gear to move along the rack, to cause the needling head to slide along the guide rail.

Optionally, the needling head is further provided with a clamping mechanism; and

- the clamping mechanism includes one or more groups of clamping wheels that are opposite to each other, and each of the groups of the clamping wheels clamp the needling head against the guide rail, and are slidable along the guide rail.

Optionally, the base is provided with an installation column, and the installation column is for installing the preform body;

- the base is further provided with a rotating mechanism, an elevating mechanism and a moving mechanism; and
- the rotating mechanism, the elevating mechanism and the moving mechanism are connected to the installation column, the rotating mechanism is for driving the preform body to rotate around an axis of the preform body, the elevating mechanism is for driving the preform body to move in a vertical direction, and the moving mechanism is for driving the preform body to move in a horizontal direction.

Optionally, the bearing frame is provided with a sliding rail, a sliding block is provided on one side of the support that is close to the bearing frame, and the sliding block is embedded inside the sliding rail, and is slidable along the sliding rail.

Optionally, the support includes a frame body and a detaching end;

- the guide rail is provided on the frame body;
- the frame body is detachably connected to the detaching end, one end of the frame body that is close to the detaching end is provided with an opening, and the opening is for realizing detaching and attaching of the needling assembly from and to the guide rail; and
- both of the frame body and the detaching end are slidably connected to the bearing frame.

The present disclosure has the following advantages:

The needling assembly is slidably connected to the support, whereby the position of the needling assembly on the support may be regulated. The base is provided inside the bearing frame, and the base is for bearing the preform body, whereby the position at which the needling assembly and the preform body are opposite to each other may be regulated, to in turn regulate the operating region of the needling operation by the needling assembly to the preform body. Accordingly, the needling assembly may perform an all-around needling operation to the circular-arc surface of the preform body, and depth and density of the needling are even, which may prevent deformation and layering of the preform body during the deposition, to improve the processing quality of the preform body. Additionally, the needling assembly may automatically perform the needling operation, at a high speed and with a high processing efficiency.

The above description is merely a summary of the technical solutions of the present disclosure. In order to more clearly know the elements of the present disclosure to enable the implementation according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present disclosure more apparent and understandable, the particular embodiments of the present disclosure are provided below.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure or the prior art, the figures that are required to describe the embodiments or the prior art will be briefly described below. Apparently, the figures that are described below are embodiments of the present disclosure, and a person skilled in the art can obtain other figures according to these figures without paying creative work.

FIG. 1 is a schematic structural diagram of a preform body according to the present disclosure;

FIG. 2 is a first schematic structural diagram of the operating state of a needling device according to the present disclosure;

FIG. 3 is a schematic structural diagram of a needling assembly according to the present disclosure;

FIG. 4 is a schematic structural diagram of a base according to the present disclosure;

FIG. 5 is a schematic structural diagram of a support according to the present disclosure; and

FIG. 6 is a second schematic structural diagram of the operating state of a needling device according to the present disclosure.

DESCRIPTION OF THE REFERENCE NUMBERS

100—preform body, 11—revolution surface, 12—circular-arc surface, 13—top face, 200—needling assembly, 2—driving assembly, 21—first driving mechanism, 211—first electric motor, 212—reciprocating mechanism, 22—second driving mechanism, 221—second electric motor, 222—gear, 23—clamping mechanism, 231—clamping wheels, 24—needling head, 25—piercing needle, 300—support, 31—guide rail, 311—rack, 32—frame body, 33—detaching end, 34—opening, 400—base, 41—installation column, 42—rotating mechanism, 421—third electric motor, 422—rotating member, 43—elevating mechanism, 431—fourth electric motor, 432—elevating assembly, 44—moving mechanism, 441—fifth electric motor, 442—moving assembly, and 500—bearing frame.

DETAILED DESCRIPTION

In order to make the objects, the technical solutions and the advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. Apparently, the described embodiments are merely certain embodiments of the present disclosure, rather than all of the embodiments. All of the other embodiments that a person skilled in the art obtains on the basis of the embodiments of the present disclosure without paying creative work fall within the protection scope of the present disclosure.

In order to make the above purposes, features and advantages of the present disclosure more apparent and understandable, the present disclosure will be described in further detail below with reference to the drawings and the particular embodiments.

The embodiments of the present disclosure provide a needling device, which may be used for processing a preform body, wherein the preform body may be a carbon/carbon composite-material preform body. In the field of processing of graphite products, the preform body may be a graphite preform body. In the technical field of photovoltaics, the preform body may be a crucible-side preform body, a heat-shield preform body, a thermal-insulation-quilt preform body, a heating-body preform body and a preform body of a related thermal-field component. In the technical field of aviation, the preform body may be a heat shielding component, a braking component, a blade component, a turbine component, and so on, of an aircraft. The embodiments of the present disclosure merely describe by taking the case as an example in which the preform body is a graphite preform body, and other types of preform bodies may refer thereto.

Referring to FIG. 1, FIG. 1 shows a schematic structural diagram of a preform body according to the present disclosure. As shown in FIG. 1, the preform body 100 includes a revolution surface 11, a top face 13 perpendicular to the revolution surface 11, and a circular-arc surface 12 connecting the revolution surface 11 and the top face 13. The preform body 100 is formed by weaving multiple layers of carbon-fiber cloth. In the weaving process, it is required to wrap the carbon-fiber cloth onto the preform body 100 layer by layer, and every time one layer of the carbon-fiber cloth has been wrapped, it is required to perform one round of needling to the revolution surface 11, the top face 13 and the circular-arc surface 12 of the preform body 100, to cause the preform body 100 to be compact.

Referring to FIG. 2, FIG. 2 shows a first schematic structural diagram of the operating state of a needling device according to the present disclosure. As shown in FIG. 2, the needling device according to the embodiments of the present disclosure may particularly include: a needling assembly 200, a support 300, a base 400 and a bearing frame 500. The base 400 may be provided inside the bearing frame 500, and the base 400 may be for bearing the preform body 100. The support 300 may be connected to the bearing frame 500, and is opposite to the base 400 and the preform body 100. The needling assembly 200 may be slidably connected to the support 300, and may slide along a guide rail 31, to perform a needling operation to the preform body 100.

In the embodiments of the present disclosure, the needling assembly 200 is slidably connected to the support 300, whereby the position of the needling assembly 200 on the support 300 can be regulated. The base 400 is provided inside the bearing frame 500, and the base 400 is used for bearing the preform body 100, whereby the position at which the preform body 100 and the needling assembly 200 are opposite to each other may be regulated, to in turn regulate the operating region of the needling operation by the needling assembly 200 to the preform body 100. Accordingly, the needling assembly 200 may perform an all-around needling operation to the circular-arc surface 12 of the preform body 100, and depth and density of the needling are even, which may prevent deformation and layering of the preform body 100 during the deposition, to improve the processing quality of the preform body 100. Additionally, the needling assembly 200 may automatically perform the needling operation, at a high speed and with a high processing efficiency.

Optionally, the support 300 may be provided with the guide rail 31, and the guide rail 31 may include at least one circular-arc section. In practical applications, the at least one circular-arc section of the guide rail 31 may correspond to the circular-arc surface 12 of the preform body 100, so that, during the process of the sliding of the needling assembly 200 at the circular-arc section of the guide rail 31, the distance from the needling assembly 200 to the circular-arc surface 12 of the preform body 100 may maintain constant. Accordingly, when the needling assembly 200 is performing the needling operation to the circular-arc surface 12 of the preform body 100, the evenness of the needling by the needling assembly 200 to the circular-arc surface 12 of the preform body 100 may be increased.

Particularly, the guide rail 31 may match with the shape of the top face 13 of the preform body 100, so that the depth and the density of the needling by the needling assembly 200 to the top face 13 of the preform body 100 are even.

In practical applications, the position of the needling assembly 200 on the guide rail 31 may be manually regulated, or the needling device may be provided with a button, to automatically regulate the position of the needling assembly 200 on the guide rail 31 by pressing the button.

Referring to FIG. 3, FIG. 3 shows a schematic structural diagram of a needling assembly according to the present disclosure, as shown in FIG. 3, the needling assembly 200 may include: a driving assembly 2, a needling head 24 and a piercing needle 25. The piercing needle 25 may be connected to the needling head 24, the needling head 24 may be connected to the driving assembly 2, and the needling head 24 may be slidably connected to the guide rail 31 on the support 300. The driving assembly 2 may include a first driving mechanism 21, the first driving mechanism 21 may be connected to the needling head 24, and the first driving mechanism 21 may be used for driving the needling head 24 to drive the piercing needle 25 to needle the preform body 100.

Particularly, when the needling assembly 200 is used for performing the needling operation to the preform body 100, the first driving mechanism 21 may drive the needling head 24 to move, so that the piercing needle 25 may perform the needling operation to the preform body 100 at a constant speed, whereby the depth and the density of the piercing by the piercing needle 25 into the preform body 100 are even. That may prevent deformation and layering of the preform body 100 during the deposition due to an uneven needling density.

In practical applications, the first driving mechanism 21 may include a first electric motor 211 and a reciprocating mechanism 212, and the reciprocating mechanism 212 may include a cam and a connecting rod. Particularly, the first electric motor 211 may be connected to the cam, the first electric motor 211 may be used for driving the cam to move, the cam may be connected to the connecting rod, the cam is used for driving the connecting rod to move back and forth, and the connecting rod is connected to the needling head 24, whereby the needling head 24 may needle the preform body 100.

Optionally, the needling head 24 may be provided with an elastic member, and the piercing needle 25 may be connected to the needling head 24 by the elastic member. Because the elastic member may be used for regulating the force of the piercing needle 25, the depth of the needling by the piercing needle 25 to the preform body 100 is even. Particularly, the elastic member may be an adjustable spring.

Optionally, the driving assembly 2 may further include a second driving mechanism 22, and the second driving mechanism 22 may be slidably connected to the guide rail 31 on the support 300. The second driving mechanism 22 may be used for driving the needling head 24 to slide along the guide rail 31. In practical applications, the second driving mechanism 22 may drive the needling head 24 to slide along the guide rail 31. Accordingly, when the needling assembly 200 is needling the circular-arc surface 12 of the preform body 100, the position at which the needling head 24 aligns with the circular-arc surface 12 of the preform body 100 can be regulated, whereby the piercing needle 25 can perform an all-around needling operation to the circular-arc surface 12.

Optionally, the guide rail 31 may be provided with a rack 311. The second driving mechanism 22 may include an electric motor and a gear 222, the electric motor may be rotatably connected to the gear 222, the gear 222 may be engaged with the rack 311, and the electric motor may be used for driving the gear 222 to move along the rack 311. Particularly, the electric motor is a second electric motor 221 in FIG. 3. Because the gear 222 is engaged with the rack 311, the gear 222 may move along the rack 311, whereby the needling head 24 can slide along the guide rail 31, which improves the stability of the slidable connection between the needling head 24 and the guide rail 31.

Optionally, the needling head 24 may further be provided with a clamping mechanism 23. The clamping mechanism 23 may include one or more groups of clamping wheels 231 that are opposite to each other, and each of the groups of the clamping wheels 231 clamp the guide rail 31, and are slidable along the guide rail 31. In the embodiment of the present disclosure, the one or more groups of clamping wheels 231 that are opposite to each other may clamp the guide rail 31, whereby, during the sliding of the needling head 24 along the guide rail 31, the needling head 24 slides while adhering to the guide rail 31, which may prevent falling of the needling head 24 from the guide rail 31, which affects the quality of the needling by the needling head 24 to the preform body 100.

Referring to FIG. 2 and FIG. 3, the gear 222 may be used as the clamping wheels 231. Particularly, as shown in FIG. 2 and FIG. 3, the clamping mechanism 23 may be provided with two groups of the clamping wheels 231, each of the groups of the clamping wheels 231 may include two clamping wheels 231 and two gears 222, and the clamping wheels 231 and the gears 222 are opposite to each other. During the sliding of the needling head 24 along the guide rail 31, the clamping wheels 231 may cooperate with the gears 222 to clamp the guide rail 31, to provide the adhesive force of the needling head 24 on the guide rail 31, to prevent falling of the needling head 24 from the guide rail 31, which affects the quality of the needling by the needling head 24 to the preform body 100. Moreover, the engagement between the clamping wheels 231 and the gears 222 can drive the needling assembly 300 to move on the guide rail 31. The present disclosure provides a structure of the clamping mechanism 23 shown in FIG. 2 and FIG. 3, which may particularly refer to the configurations of FIG. 2 and FIG. 3, and is not particularly limited in the present disclosure.

Referring to FIG. 4, FIG. 4 shows a schematic structural diagram of a base according to the present disclosure. As shown in FIG. 4, in another embodiment of the present disclosure, the base 400 may be provided with an installation column 41, and the installation column 41 may be used for installing the preform body 100. The base 400 may further be provided with a rotating mechanism 42, the rotating mechanism 42 may be connected to the installation column 41, and the rotating mechanism 42 may be used for driving the preform body 100 to rotate around the axis of the preform body 100.

In practical applications, when the needling assembly 200 is performing the needling operation to the circular-arc surface 12 of the preform body 100, the needling assembly 200 performs the reciprocating movement to perform the needling operation to the preform body 100. The rotating mechanism 42 may drive the installation column 41 to rotate, so as to drive the preform body 100 to rotate around the axis of the preform body 100, whereby the needling assembly 200 can needle various areas of the circular-arc surface 12, to more completely needle the circular-arc surface 12.

Particularly, the rotating mechanism 42 may include a rotating member 422 and a third electric motor 421. The third electric motor 421 may be connected to the rotating member 422, and is used for driving the rotating member 422 to rotate. The rotating member 422 may be connected to the installation column 41, and is used for driving the installation column 41 to rotate.

Optionally, the base 400 may further be provided with an elevating mechanism 43 and a moving mechanism 44. The elevating mechanism 43 and the moving mechanism 44 may be connected to the installation column 41, the elevating mechanism 43 may be used for driving the preform body 100 to move in the vertical direction, and the moving mechanism 44 may be used for driving the preform body 100 to move in the horizontal direction.

In practical applications, the base 400 is provided with the elevating mechanism 43 and the moving mechanism 44. When the preform body 100 has been mounted to the base 400, the distance between the preform body 100 and the needling assembly 200 in the vertical direction may be regulated by using the elevating mechanism 43, and the distance between the preform body 100 and the needling assembly 200 in the horizontal direction may be regulated by using the moving mechanism 44. By the cooperation between the elevating mechanism 43 and the moving mechanism 44, the regulation on the distance between the preform body 100 and the needling assembly 200 is realized, whereby the needling assembly 200 can needle preform bodies 100 of different sizes, to improve the practical applicability of the needling assembly 200.

Particularly, the elevating mechanism 43 may include an elevating assembly 432 and a fourth electric motor 431. The fourth electric motor 431 may be connected to the elevating assembly 432, and is used for driving the elevating assembly 432 to move in the vertical direction. The elevating assembly 432 may be connected to the installation column 41, and is used for driving the installation column 41 to move in the vertical direction, thereby driving the preform body 100 to move in the vertical direction. The elevating assembly 432 may be formed by 4 groups of turbines and worms of the same model, and the 4 groups of turbines and worms operate synchronously, to drive the preform body 100 to ascend and descend stably. The elevating assembly 432 may also be of another structure, which is not particularly limited in the present disclosure.

The moving mechanism 44 may include a moving assembly 442 and a fifth electric motor 441. The fifth electric motor 441 may be connected to the moving assembly 442, and is used for driving the moving assembly 442 to move in the horizontal direction. The moving assembly 442 may be connected to the installation column 41, and is used for driving the installation column 41 to move in the horizontal direction, thereby driving the preform body 100 to move in the horizontal direction. The moving assembly 442 may be formed by turbines and worms.

In another embodiment of the present disclosure, the support 300 may be movably connected to the bearing frame 500. Accordingly, the support 300 may slide along the bearing frame 500, which facilitates to regulate the position of the support 300 on the bearing frame 500.

Optionally, the bearing frame 500 may be provided with a sliding rail, a sliding block may be provided on the side of the support 300 that is close to the bearing frame 500, and the sliding block may be embedded inside the sliding rail, and is slidable along the sliding rail.

In practical applications, the support 300 may slide along the bearing frame 500, the bearing frame 500 is provided with the sliding rail, and the support 300 is correspondingly provided with the sliding block. By the sliding fitting between the sliding block and the sliding rail, the stability of the sliding fitting between the support 300 and the bearing frame 500 can be increased.

Furthermore, because the position at which the needling assembly 200 corresponds to the preform body 100 can be regulated, when the preform body 100 is being detached, the support 300 may be slid to a position on the bearing frame 500 that is away from the preform body 100, to prevent interference between the support 300 and the preform body 100.

Particularly, as shown in FIG. 2, the support 300 may slide along the bearing frame 500, whereby, using the direction of the sliding of the support 300 along the bearing frame 500 as the X-axis direction, the distance between the needling assembly 200 and the preform body 100 in the X-axis direction can be regulated. The moving mechanism 44 may drive the preform body 100 to move in the horizontal direction in the Y-axis direction, whereby the distance between the needling assembly 200 and the preform body 100 in the Y-axis direction can be regulated. The elevating mechanism 43 may drive the preform body 100 to move in the vertical direction in the Z-axis direction, whereby the distance between the needling assembly 200 and the preform body 100 in the Z-axis direction can be regulated. Because the X-axis, the Y-axis and Z-axis are perpendicular to each other, the distance between the needling assembly 200 and the preform body 100 can be flexibly regulated.

Referring to FIG. 5, FIG. 5 shows a schematic structural diagram of a support according to the present disclosure. As shown in FIG. 5, the support 300 may include a frame body 32 and a detaching end 33. The guide rail 31 may be provided on the frame body 32. The frame body 32 is detachably connected to the detaching end 33, the end of the frame body 32 that is close to the detaching end 33 is provided with an opening 34, and the opening 34 is used for realizing detaching and attaching of the needling assembly 200 from and to the guide rail 31.

In practical applications, the frame body 32 and the detaching end 33 are detachably connected, so that the needling assembly 200 can be quickly detached from the support 300 or quickly mounted to the support 300, thereby quickly replacing the needling assembly 200.

Referring to FIG. 6, FIG. 6 shows a second schematic structural diagram of the operating state of a needling device according to the present disclosure. As shown in FIG. 6, both of the frame body 32 and the detaching end 33 are slidably connected to the bearing frame 500. In practical applications, when the needling assembly 200 has been mounted to the support 300, the position of the needling assembly 200 can be regulated by sliding the frame body 32 and the detaching end 33 along the bearing frame 500.

The present disclosure has the following advantages:

The needling assembly is slidably connected to the support, whereby the position of the needling assembly on the support can be regulated. The base is provided inside the bearing frame, and the base is for bearing the preform body, whereby the position at which the needling assembly and the preform body are opposite to each other can be regulated, to in turn regulate the operating region of the needling operation by the needling assembly to the preform body. Accordingly, the needling assembly can perform an all-around needling operation to the circular-arc surface of the preform body, and the depth and the density of the needling are even, which can prevent deformation and layering of the preform body during the deposition, to improve the processing quality of the preform body. Additionally, the needling assembly can automatically perform the needling operation, at a high speed and with a high processing efficiency.

It should also be noted that, in the present text, relation terms such as first and second are merely intended to distinguish one entity or operation from another entity or operation, and that does not necessarily require or imply that those entities or operations have therebetween any such actual relation or order. Furthermore, the terms “include”, “comprise” or any variants thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles or terminal devices that include a series of elements do not only include those elements, but also include other elements that are not explicitly listed, or include the elements that are inherent to such processes, methods, articles or terminal devices. Unless further limitation is set forth, an element defined by the wording “including a . . . ” does not exclude additional same element in the process, method, article or terminal device including the element.

The needling device according to the present disclosure has been described in detail above. The principle and the embodiments of the present disclosure are described herein with reference to the particular examples, and the description of the above embodiments is merely intended to facilitate to understand the method according to the present disclosure and its core concept. Moreover, for a person skilled in the art, according to the concept of the present disclosure, the particular embodiments and the range of application may be varied. In conclusion, the contents of the description should not be understood as limiting the present disclosure.

The above-described device embodiments are merely illustrative, wherein the units that are described as separate components may or may not be physically separate, and the components that are displayed as units may or may not be physical units; in other words, they may be located at the same one location, and may also be distributed to a plurality of network units. Some or all of the modules may be selected according to the actual demands to realize the purposes of the solutions of the embodiments. A person skilled in the art can understand and implement the technical solutions without paying creative work.

The “one embodiment”, “an embodiment” or “one or more embodiments” as used herein means that particular features, structures or characteristics described with reference to an embodiment are included in at least one embodiment of the present disclosure. Moreover, it should be noted that here an example using the wording “in an embodiment” does not necessarily refer to the same one embodiment.

The description provided herein describes many concrete details. However, it can be understood that the embodiments of the present disclosure may be implemented without those concrete details. In some of the embodiments, well-known processes, structures and techniques are not described in detail, so as not to affect the understanding of the description.

In the claims, any reference signs between parentheses should not be construed as limiting the claims. The word “include” does not exclude elements or steps that are not listed in the claims. The word “a” or “an” preceding an element does not exclude the existing of a plurality of such elements. The present disclosure may be implemented by means of hardware including several different elements and by means of a properly programmed computer. In unit claims that list several devices, some of those devices may be embodied by the same item of hardware. The words first, second, third and so on do not denote any order. Those words may be interpreted as names.

Finally, it should be noted that the above embodiments are merely intended to explain the technical solutions of the present disclosure, and not to limit them. Although the present disclosure is explained in detail with reference to the above embodiments, a person skilled in the art should understand that he can still modify the technical solutions set forth by the above embodiments, or make equivalent substitutions to part of the technical features of them. However, those modifications or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

NEEDLING APPARATUS

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