Patent Application
20200011457
The present invention relates to the technical field of water pipe fittings, and in particular to a water passing component, and a laser welding device and a welding method thereof.
With the increasing improvement of the living standard of people, there are higher requirements for the quality of the living environment. Taps, fittings and other water passing components used in household kitchen and toilet are often made of copper material. However, the copper material contains a certain proportion of lead, arsenic and other chemical components harmful to human bodies, which will affect the health of consumers.
In order to overcome the defects of the material, the water passing components of copper material are innovated technically by many sanitary ware companies on the market. For example, better material is used to replace the copper material. At present, plastics such as PE and PEX are used widely. However, because these plastics have a heat-resistance temperature of about 60° C. and cannot be used under high-temperature hot water environments for long, the existing water passing components are made of PERT material. PERT is a non-crosslinked polyethylene pipe that can be used in hot water, and is also a medium density polyethylene pipe. It not only has the characteristic of high temperature resistance, but also has the characteristics of good flexibility, good pressure resistance, no toxicity, no taste, no pollution and low temperature resistance, and is especially suitable for the material of the water passing components. Furthermore, the water passing components are made of plastic such as PERT instead of the copper material, thereby substantially reducing material cost and part processing cost and reducing the harm of heavy metal contained in the water passing components of the copper material to the human bodies, so that market competitiveness of the product is enhanced.
The present application is created based on the knowledge and discovery of the inventor for the following problems:
When a water passing component made of plastic material is connected with a water outlet component, connecting technologies and methods such as vibration friction welding technology, ultrasonic welding technology and hot plate welding technology are mainly adopted in the related art. However, when the hot plate welding technology is used, it has the defects of easy adhesion of plastic to a hot plate and long cycle time; when the vibration friction welding technology is used, the shape of the component is limited and the component is easy to wear and produce polymer dust; and when the ultrasonic welding technology is used, the size of a weldment is limited and the weldment is easy to generate resonance.
The present invention aims to solve one of technical problems in the above background at least to a certain extent. To this end, the first purpose of the present invention is to propose a water passing component. A connecting and matching position is melted using a laser welding technology to weld the hose and the hose joint into a whole. The transparency of the hose and the hose joint is not limited, and there is no requirement for the transparency of the hose and the hose joint, thereby reducing production cost, increasing production efficiency and expanding use range.
The second purpose of the present invention is to propose a laser welding device of a water passing component.
The third purpose of the present invention is to propose a welding method of a water passing component.
To achieve the above purposes, a water passing component proposed in the embodiment of the first aspect of the present invention comprises: a hose; and a hose joint, wherein the hose joint and the hose are matched and connected to form a connecting and matching position; the connecting and matching position can be melted under laser beams to weld the hose and the hose joint into a whole; and the width of a gap of a weld matching surface corresponding to the connecting and matching position is less than 0.075 mm.
According to the water passing component in the embodiments of the present invention, the connecting and matching position is melted using a laser welding technology to weld the hose and the hose joint into a whole. The width of the gap of the weld matching surface corresponding to the connecting and matching position is limited to be less than 0.075 mm. In this way, during laser welding, the transparency of the hose and the hose joint is not limited, and there is no requirement for the transparency of the hose and the hose joint, thereby reducing production cost, increasing production efficiency and expanding use range.
According to one embodiment of the present invention, the hose joint is sleeved on the end part of the hose, wherein the head end of the hose and the tail end of the hose joint are abutted against each other and are welded into a whole through melting; at least one of the hose and the hose joint is made of melting material which can be melted under the laser beams; or at least one of the head end of the hose and the tail end of the hose joint is coated with a coating made of the melting material which can be melted under the laser beams; or a melting element made of the melting material which can be melted under the laser beams is arranged between the head end of the hose and the tail end of the hose joint.
According to another embodiment of the present invention, the hose joint comprises a connecting part; the connecting part can extend into the hose and is closely matched with the inner wall of the hose; the outer surface of the connecting part is provided with a screw thread; and the screw thread rotatably slides along the inner wall of the hose when the hose joint rotates, to insert the connecting part into the hose.
To achieve the above purposes, a laser welding device of a water passing component is proposed in the embodiment of the second aspect of the present invention, comprising a hose joint clamping part and a hose clamping part; each of the hose joint clamping part and the hose clamping part is composed of more than two opening-closing clamping components; a first holding cavity for clamping and fixing the hose joint is arranged in the hose joint clamping part; the shape of the first holding cavity is matched with the external shape of the hose joint; a second holding cavity for clamping and fixing the hose is arranged in the hose clamping part; the shape of the second holding cavity is matched with the external shape of the hose; the hose clamping part can enter the hose joint clamping part under the action of a drive device and can enable the head end of the hose clamped and fixed by the hose clamping part to be opposite to and abutted against the tail end of the hose joint clamped and fixed by the hose joint clamping part; the side wall of the hose joint clamping part is provided with slits through which the laser beams passes; the slits are arranged along the circumference of the side wall of the hose joint clamping part; a plurality of lasers are uniformed arranged outside the slits; after the laser beams emitted by the lasers pass through the slits, a plane laser beam distributed along the circumferential wall of the hose joint is formed; the laser beams correspond to the abutting surface between the head end of the hose and the tail end of the hose joint; and when the laser beams irradiate, the melting material of the abutting surface between the head end of the hose and the tail end of the hose joint is simultaneously melted and then the head end of the hose and the tail end of the hose joint are welded into a whole.
According to the laser welding device of the water passing component in the embodiments of the present invention, after the laser light emitted by the lasers passes through the slits, a plane laser beam distributed along the circumferential wall of the hose joint is formed. During irradiation, the melting material of the abutting surface between the head end of the hose and the tail end of the hose joint is simultaneously melted. Thus, in the welding process, the water passing component does not need to rotate, thereby shortening the processing cycle, increasing the efficiency and avoiding insufficient melting of the melting material due to easy deviation generated in clamping and positioning the hose. Therefore, the manufactured connecting structure has a joint strength higher than 300 psi during a burst pressure test, and also has higher strength and better safety.
To achieve the above purposes, a welding method of a water passing component is proposed in the embodiment of the third aspect of the present invention, wherein the water passing component comprises a hose and a hose joint sleeved to the end part of the hose and the welding method comprises the following steps: abutting the head end of the hose against the tail end of the hose joint, and welding into a whole after the melting material is melted under laser beam irradiation, wherein during melting welding, the width of a gap of a weld matching surface between the head end of the hose and the tail end of the hose joint is less than 0.075 mm; the melting thickness of the melting material is 3-6 mm; the light sources of the laser beams are yttrium aluminum garnet lasers or diode lasers; and the wavelength of the laser beams is 0.80-1.06 μm.
According to the welding method of the water passing component in the embodiments of the present invention, one plane laser beam is adopted. During irradiation, the melting material of the abutting surface between the head end of the hose and the tail end of the hose joint is simultaneously melted. Thus, in the welding process, the water passing component does not need to rotate, thereby shortening the processing cycle, increasing the efficiency and avoiding insufficient melting of the melting material due to easy deviation generated in clamping and positioning the hose. Therefore, the manufactured connecting structure has a joint strength higher than 300 psi during a burst pressure test, and also has higher strength and better safety.
Embodiments of the present invention will be described below in detail. Examples of the embodiments are shown in drawings, wherein same or similar reference signs refer to same or similar elements or elements having same or similar functions from beginning to end. Embodiments described below by reference to the drawings are exemplary embodiments, and are used for explaining the present invention, and shall not be understood as a limitation to the present invention.
To better understand the above technical solution, exemplary embodiments of the present invention will be described below in more detail with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be realized in various forms, and shall not be limited by the embodiments elaborated herein. On the contrary, the purpose of providing the embodiments is to understand the present invention more thoroughly and to completely communicate the scope of the present invention to those skilled in the art.
As shown in the drawings, the water passing component proposed in the embodiments of the present invention comprises: a hose 1 and a hose joint 2. The hose joint 2 and the hose 1 are matched and connected to form a connecting and matching position; the connecting and matching position can be melted under laser beams to weld the hose 1 and the hose joint 2 into a whole; and the width of a gap of a weld matching surface corresponding to the connecting and matching position is less than 0.075 mm.
It can be understood that, as shown in
Or, as shown in
According to the water passing component in the embodiments of the present invention, the connecting and matching position is melted using a laser welding technology to weld the hose and the hose joint into a whole. The width of the gap of the weld matching surface corresponding to the connecting and matching position is limited to be less than 0.075 mm. In this way, during laser welding, the transparency of the hose and the hose joint is not limited, and there is no requirement for the transparency of the hose and the hose joint, thereby reducing production cost, increasing production efficiency and expanding use range.
Further, as one embodiment, as shown in
According to one embodiment of the present invention, the screw thread 22 is a tapping screw thread; and the tapping screw thread is arranged in the position of the head of the outer surface of the connecting part 21, as shown in
In this way, when rotating, the connecting part with the tapping screw thread can automatically advance without any propelling force, thereby realizing quick and convenient installation and increasing the efficiency.
In the embodiment, general expansion straight insertion is changed into a screwing mode for connection with the hose, which not only facilitates installation and realizes high efficiency, but also ensures more firm connection for the hose and the hose joint on the premise of preventing the main body from excessively expanding the head end and influencing the service life due to fatigue of hose material. Thus, the hose and the hose joint are prevented from falling, and are difficult to get loose.
According to one embodiment of the present invention, as shown in
Optionally, in the present embodiment, the hose 1 and/or the connecting part 21 are made of the melting material which can be melted under the laser beams.
Or, as shown in
Through the adoption of the water passing component in the above technical solution, by means of the direct laser welding technology, the problems of poor welding strength, great deformation and no guarantee for sealing performance easily generated in a vibration friction welding technology, an ultrasonic welding technology and a hot plate welding technology in the related art can be solved. The transparency of the hose and the hose joint is not limited, and there is no requirement for the transparency of the hose and the hose joint, thereby reducing production cost and enhancing production quality. Moreover, the water passing component can also be applied to more forms of hoses and hose joints, thereby expanding the use range. In addition, general expansion straight insertion is changed into a screwing mode for connection with the hose, which not only enhances the convenience of technological operation, but also increases the limit burst pressure of the hose, so that sealing performance is strong and the appearance is beautiful.
As another embodiment, as shown in
In the present embodiment, at least one of the hose 1 and the hose joint 2 is made of melting material which can be melted under the laser beams.
As shown in
Through the adoption of the water passing component in the above technical solution, by means of the abutting welding mode, the problems of poor welding strength, great deformation and no guarantee for sealing performance easily generated in a vibration friction welding technology, an ultrasonic welding technology and a hot plate welding technology in the related art can be solved. The transparency of the hose and the hose joint is not limited, and there is no requirement for the transparency of the hose and the hose joint, thereby reducing production cost and enhancing production quality. Moreover, the water passing component can also be applied to more forms of hoses and hose joints, thereby expanding the use range.
In the embodiments of the present invention, the above water passing component is welded through the following welding manner.
As another example, the water passing component comprises a hose and a hose joint sleeved on the end part of the hose. The head end of the hose and the tail end of the hose joint are abutted against each other and are welded into a whole after the melting material is melted under laser beam irradiation.
A relationship curve chart between the welding strength and the width of the gap of the weld matching surface is shown in
As shown in
As one example, the water passing component comprises a hose and a hose joint matched with the hose. The hose joint comprises a connecting part; the connecting part can extend into the hose and is closely matched with the inner wall of the hose; the head end of the outer surface of the connecting part is provided with a screw thread; and the screw thread rotatably slides along the inner wall of the hose when the hose joint rotates, to insert the connecting part into the hose and keep stable connection. The connecting and matching position of the connecting part and the hose can be melted under the laser beams to weld into a whole. For example, the hose and/or the connecting part are made of the melting material which can be melted under the laser beams. Or, the outer surface of the connecting part and/or the inner wall of the hose matched with the connecting part is coated with a coating; and the coating is made of the melting material which can be melted under the laser beams.
As one example, the melting material may be amorphous plastic or semi-crystalline plastic.
Reflected beams generated after the laser beams respectively irradiate the amorphous plastic and the semi-crystalline plastic are shown in
As shown in
As one embodiment, the melting material may be at least one of amorphous plastic such as polycarbonate (PC), polystyrene (PS), polysulfone (PAU), polymethylmethacrylate (PMMA) and ABS plastic, or at least one of semi-crystalline plastic such as polypropylene (PP), polyethene (PE) and polyamide (PA), and of course, can also be a mixture of the amorphous plastic and the semi-crystalline plastic. Optical performance and welding performance of different melting materials are compared and listed in Table 1 below.
When the melting material is the semi-crystalline plastic, the influence of the microcrystal diameter on laser absorption performance is shown in
As shown in
A relationship curve chart between the melting thickness of the melting material and the required laser power for the material thickness is shown in
As shown in
However, for the semi-crystalline plastic, because the laser beams are repeatedly reflected therein, there is a very close relationship between the laser power required for penetration and the thickness. When the melting thickness of the melting material is 3-6 mm, the required laser power is less than 30 W/cm.
Comparison of the optical performance of three different light sources of the laser beams is shown in
Absorption effects of two different light sources are shown in
In the present embodiment, based on the consideration of cost and efficiency, the light sources of the laser beams are yttrium aluminum garnet lasers or diode lasers; and the wavelength of the laser beams is 0.80-1.06 μm.
The relationship between the content of glass fibers in the melting material and the optical performance is shown in
The relationship between the content of the colorant in the melting material and the optical performance is shown in
By combining
As another example, at least two yttrium aluminum garnet lasers or diode lasers are arranged; two or more yttrium aluminum garnet lasers or diode lasers are disposed along the external circumference of the hose joint; laser beams emitted by the yttrium aluminum garnet lasers or the diode lasers form an irradiating surface of 360° along the exterior of the hose joint; and the laser beams simultaneously irradiate the melting material from the exterior of the hose joint within one irradiating work cycle.
In the water passing component in the embodiments of the present invention, the hose joint is sleeved on the end part of the hose. One plane laser beam is adopted. During irradiation, the melting material of the abutting surface between the head end of the hose and the tail end of the hose joint is simultaneously melted. Thus, in the welding process, the water passing component does not need to rotate, thereby shortening the processing cycle, increasing the efficiency and avoiding insufficient melting of the melting material due to easy deviation generated in clamping and positioning the hose. Therefore, the manufactured connecting structure has a joint strength higher than 300 psi during a burst pressure test, and also has higher strength and better safety.
As one example, the hose joint comprises a connecting part; the connecting part can extend into the hose and is closely matched with the inner wall of the hose; the outer surface of the connecting part is provided with a screw thread; and the screw thread rotatably slides along the inner wall of the hose when the hose joint rotates, to insert the connecting part into the hose. At least two of the yttrium aluminum garnet lasers or diode lasers are disposed along the external circumference of the connecting and matching position; laser beams emitted by the yttrium aluminum garnet lasers or the diode lasers form an irradiating surface of 360° along the exterior of the connecting and matching position; and the laser beams simultaneously irradiate the melting material from the exterior of the connecting and matching position within one irradiating work cycle.
In the water passing component in the embodiments of the present invention, the general expansion straight insertion is changed into the screwing mode for connection with the hose, and one plane laser beam is adopted for irradiating the matching position. During irradiation, the melting material is simultaneously melted. Thus, in the welding process, the water passing component does not need to rotate, thereby shortening the processing cycle, increasing the efficiency and avoiding insufficient melting of the melting material due to easy deviation generated in clamping and positioning the hose. Therefore, the manufactured connecting structure has a joint strength higher than 300 psi during a burst pressure test, and also has higher strength and better safety.
Specifically, as shown in
According to the water passing component in the embodiments of the present invention, the screw thread is arranged on the outer surface of the connecting part of the hose joint extended into the hose and closely matched with the inner wall of the hose. Thus, the general expansion straight insertion is changed into the screwing mode for connection with the hose, which not only facilitates installation and realizes high efficiency, but also ensures more firm connection for the hose and the hose joint on the premise of preventing the connecting part from excessively expanding the head end of the hose and influencing the service life due to fatigue of hose material. Moreover, the connecting and matching positions of the connecting part and the hose can be melted under the laser beams and welded into a whole. Thus, the transparency of the hose and the hose joint is not limited, and there is no requirement for the transparency of the hose and the hose joint, thereby reducing production cost and enhancing production quality. Moreover, the water passing component can also be applied to more forms of hoses and hose joints, thereby expanding the use range.
In addition, as one embodiment, as shown in
Moreover, the width of a gap of a weld matching surface between the head end of the water passing pipe and the tail end of the water passing pipe joint is less than 0.075 mm.
As one embodiment, the water passing pipes and the water passing pipe joints may be made of high-performance high-molecular polymer plastic such as PA (polyamide), PP (polypropylene), PE (polyethene), PPA (polyphthalamide), PPO (polyphenylene oxide), POM (polyformaldehyde), etc.
In the present embodiment, at least one of the water passing pipe and the water passing pipe joint is made of the melting material which can be melted under the laser beams; or at least one of the head end of the water passing pipe and the tail end of the water passing pipe joint is coated with a coating made of the melting material which can be melted under the laser beams; or a melting element made of the melting material which can be melted under the laser beams is arranged between the head end of the water passing pipe and the tail end of the water passing pipe joint.
Through the adoption of the water passing component in the above technical solution, by means of the abutting welding mode, the problems of poor welding strength, great deformation and no guarantee for sealing performance easily generated in a vibration friction welding technology, an ultrasonic welding technology and a hot plate welding technology in the related art can be solved. The transparency of the water passing pipe and the water passing pipe joint is not limited, and there is no requirement for the transparency of the hose and the hose joint, thereby reducing production cost and enhancing production quality. Moreover, the water passing component can also be applied to more forms of water passing pipes and water passing pipe joints, thereby expanding the use range.
The above laser welding mode is realized in a laser welding device of the water passing component.
As shown in
The hose clamping part 4 is connected with a clamping mechanism 5, and the clamping mechanism 5 is used for controlling the opening-closing state of the hose clamping part 4.
Similarly, the hose joint clamping part 3 is also connected with a clamping mechanism for controlling the opening-closing state of the hose joint clamping part 3 (not shown in the figure).
A first holding cavity 31 for clamping and fixing the hose joint 2 is arranged in the hose joint clamping part 3.
The shape of the first holding cavity 31 is matched with the external shape of the hose joint 2.
A second holding cavity 41 for clamping and fixing the hose 1 is arranged in the hose clamping part 4.
The shape of the second holding cavity 41 is matched with the external shape of the hose 1.
The hose clamping part 4 can enter the hose joint clamping part 3 under the action of a drive device 6 and can enable the head end of the hose 1 clamped and fixed by the hose clamping part 4 to be opposite to and abutted against the tail end of the hose joint 2 clamped and fixed by the hose joint clamping part 3.
The side wall of the hose joint clamping part 3 is provided with slits 71 through which the laser beams passes.
The slits 71 are arranged along the circumference of the side wall of the hose joint clamping part 3.
A plurality of lasers 7 are uniformly arranged outside the slits 71.
As shown in
In the laser welding device which adopts the water passing component of the above technical solution, after the laser light emitted by the lasers passes through the slits, a plane laser beam distributed along the circumferential wall of the hose joint is formed. During irradiation, the melting material of the abutting surface between the head end of the hose and the tail end of the hose joint is simultaneously melted. Thus, in the welding process, the water passing component does not need to rotate, thereby shortening the processing cycle, increasing the efficiency and avoiding insufficient melting of the melting material due to easy deviation generated in clamping and positioning the hose. Therefore, the manufactured connecting structure has a joint strength higher than 300 psi during a burst pressure test, and also has higher strength and better safety.
In addition, the embodiments of the present invention also propose a welding method of a water passing component. The water passing component comprises a hose and a hose joint sleeved to the end part of the hose and the welding method comprises the following steps: abutting the head end of the hose against the tail end of the hose joint, and welding into a whole after the melting material is melted under laser beam irradiation, wherein during melting welding, the width of a gap of a weld matching surface between the head end of the hose and the tail end of the hose joint is less than 0.075 mm; the melting thickness of the melting material is 3-6 mm; the light sources of the laser beams are yttrium aluminum garnet lasers or diode lasers; and the wavelength of the laser beams is 0.80-1.06 μm.
According to the welding method of the water passing component in the embodiments of the present invention, one plane laser beam is adopted. During irradiation, the melting material of the abutting surface between the head end of the hose and the tail end of the hose joint is simultaneously melted. Thus, in the welding process, the water passing component does not need to rotate, thereby shortening the processing cycle, increasing the efficiency and avoiding insufficient melting of the melting material due to easy deviation generated in clamping and positioning the hose. Therefore, the manufactured connecting structure has a joint strength higher than 300 psi during a burst pressure test, and also has higher strength and better safety.
In the illustration of this description, the illustration of reference terms “one embodiment”, “some embodiments”, “example”, “specific example” or “some examples”, etc. means that specific features, structures, materials or characteristics illustrated in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this description, exemplary statements for the above terms shall not be interpreted to aim at the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined appropriately in any one or more embodiments or examples. In addition, those skilled in the art can combine and integrate different embodiments or examples illustrated in this description.
Although the embodiments of the present invention have been shown and described above, it will be appreciated that the above embodiments are exemplary and shall not be understood as limitations to the present invention. Those ordinary skilled in the art can make changes, amendments, replacements and variations to the above embodiments within the scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201810713170.2 | Jul 2018 | CN | national |
| 201821040298.9 | Jul 2018 | CN | national |
| 201821637491.0 | Oct 2018 | CN | national |
