Patent Application
20160184908
The present invention relates to machinery manufacturing equipment, and more particularly to a wire sawing machine which may be digitally controlled.
Conventional wire sawing machines on the market are all a roller on which a cutting wire is wrapped around. The cutting wire moves from one end to the other end of the roller. Due to the limited length of the cutting wire, the rotation of the roller must be stopped when the cutting wire moves to its one end. Then the roller rotates reversely so that the cutting wire moves to the other end. Thus, cutting movement is not continuous, which causes the cutting wire to move not only from top to bottom but also from bottom to top during cutting of a workpiece. The lubrication of the cutting wire and chip removal will be difficult when the cutting wire moves from bottom to top. Meanwhile, the working table of wire sawing machine is of two degrees of freedom consisting of X-axis and Y-axis. The working table makes linear motion along X-axis and Y-axis directions to achieve machining of arbitrary contour shape of the workpiece by using linear interpolation mode during processing. However, when machining a component having a contour of arc or slash shape, contour lines formed by the linear interpolation mode, from the microscopic point of view, are actually a series of stepped straight segments along X-axis and Y-axis direction to obtain arc curves and slash, which makes these machined components have a rough surface and poor smoothness and unable to meet the requirement of modern high precision components processing. Thus, the wire cutting technology in the engineering is subject to a certain degree of restriction.
The object of the present invention is to provide a wire sawing machine that allows continuous cutting movement of a cutting wire so as to realize one-way movement of the cutting wire, improve cutting efficiency, make lubrication of cutting wire and chip removal easier, and make the movement direction of the working table consistent with the cutting contour direction of workpiece and the cutting contour direction of workpiece consistent with the cutting loop direction of cutting wire, thereby greatly reducing the roughness of the machined surface and improving the surface finish and processing efficiency.
To achieve the above object, a wire sawing machine is disclosed which comprises a wire storage system, a working table, a cutting fluid lubrication system and a control system connected to the cutting fluid lubrication system. The working table comprises a machine base, a linear moving table for carrying out linear movement along X-axis and Y-axis directions respectively and being in sliding connection with the machine base, and a rotary table disposed above the linear movement table and being rotatable at 360-degree above the linear moving table. The wire storage system comprises an upper wire rack and a lower wire rack respectively arranged in the upper and lower outside of the rotary table, a group of guide wheels for wire storage, and an end to end connected cutting wire passing through the upper wire rack and the lower wire rack and wound around the outside of the group of guide wheels for wire storage. The control system is connected with the group of guide wheels, the rotary table and the linear moving table, respectively.
According to the above arrangement, a closed loop cutting wire is formed by an end to end connection so as to realize a one-way movement of the cutting wire, which reduces the stop of the cutting wire, thus improving cutting efficiency and achieving a more convenient lubrication of cutting wire and chip removal. The rotary table is rotatable at 360-degree on the horizontal plane so that the moving direction of the working table is consistent with the cutting contour direction of workpiece. Thus, arc curves and slash can be formed without using stepped straight line segments along X-axis and Y-axis direction, thus ensuring a smooth machined surface.
Further, guide wheels of the guide wheels group for wire storage are disposed in parallel to each other and are arranged in polygon so that the cutting wire contacts less than ½ circumference of each guide wheel. The cutting wire is wrapped around a plurality of guide wheels, so that the length of the closed cutting wire can be kept between 10 meters to 50,000 meters, which is enough to meet the cutting needs. As the contact surface of each guide wheel with the cutting wire is less than ½ circumference, the contact area between the cutting wire and the guide wheel is reduced, and hence wear can be reduced.
Further, the wire sawing machine may comprise a synchronization means through which the group of guide wheels connect with the control system. The synchronization means makes the guide wheels connect in pairs along the cutting wire movement direction. With the synchronization means, the guide wheels can achieve synchronous rotation, and the speed of the cutting wire can be kept the same everywhere, thus wire off or wire drawing phenomenon can be avoided. Meanwhile, only one drive unit is required for driving the operation of the group of guide wheels for wire storage.
Further, the surface of the guide wheel may be provided with a plurality of annular grooves which are parallel to each other along the axial direction of the guide wheel and are wound by the cutting wire. Accordingly, with the cutting wire wound in the annular grooves, mutual movement between the cutting wires can be avoided, and wear of the cutting wire can be reduced.
Further, the cutting fluid lubrication system may comprise an oil storage tank disposed at the bottom of the linear moving table, an oil pump electrically connected with the control system, and an oil passageway connected with the oil storage tank at one end, with the opposite end thereof being disposed above the upper wire rack, the oil pump being connected with the oil passageway. The lubricating fluid which is pumped by the oil pump from the oil storage tank flows out from the port on the upper wire rack through the oil passageway to lubricate the cutting wire between the upper wire rack and the lower wire rack, and then flow back to the oil storage tank after lubrication.
Further, the rotary table may comprise a support table on which a workpiece to be machined is placed, and a bracket which is arranged at the center of the bottom of the support table, fixed to the linear moving table and connected to the control system. The support table drives a workpiece to rotate along the bracket in the horizontal direction at 360-degree.
Further, the linear moving table comprises an X-axis moving table and a Y-axis moving table, both of which are in sliding connection with each other. The X-axis moving table makes processed components move along the X-axis direction, and the Y-axis moving table makes the processed components move along the Y-axis direction.
Further, the wire sawing machine may be provided with a first driving device, a second driving device and a third driving device, the bracket, the X-axis moving table and the Y-axis moving table are connected with the control system respectively through the first driving device, the second driving device and the third driving device correspondingly. The three driving devices are used to control the movements of the circular motion, linear motion along the X-axis and the Y-axis respectively, so as to provide a more accurate moving direction and speed of the working table, thus ensuring the machining precision.
Further, the wire sawing machine may be provided with a protective cover having a transparent observation window. The protecting cover may be arranged outside of the working table and surround the working table. The protective cover prevents the lubricating fluid of work from spraying to the outside to avoid environmental pollution. A process can be easy observed through the transparent observation window of the shield.
Further, the cutting wire may be a diamond wire saw which is suitable for cutting metal, stone, glass, ceramics, sapphire and other hard materials.
The following beneficial effects can be obtained from the above arrangements.
Other features, objects and advantages of the present invention will emerge from a reading of the following detailed description and with regard to the accompanying drawings given by way of non-limitative example and in which:
wherein,
A clear and specific description about the technical solutions of the present invention will be given below with reference to the drawings. It would be appreciated by the skilled in the art that the embodiments presented are only a part of embodiments of the present invention for illustration purposes. Based on the embodiments disclosed in the application, various implementation and other embodiments can be obtained by those having ordinary skill in the art without inventive effort, and are deemed to be within the scope of the present invention.
As shown in
As shown in
As shown in
With reference to
The operating of the present invention will be described as follows:
The controller of the control system 3 outputs signals generated according to a profile of the workpiece to be machined for controlling the motor to drive the rotary table in circular motion and to drive the X-axis moving table in linear motion along X-axis direction and the Y-axis moving table in linear motion along Y-axis direction respectively. Meanwhile, the controller also start the synchronization means to drive the guide wheel to rotate so that the cutting wire is driven to move during the rotation of the guide wheel. The workpiece placed on the support table is cut by the cutting wire positioned between the upper wire rack and the lower wire rack. In the meantime, the oil pump is started by the controller so that the lubricating oil which is drawn by the oil pump from the oil storage tank flows from the port of the upper wire rack along the cutting wire through the oil passageway for lubricating and cooling purpose during machining. The outflow of the lubrication fluid flows back to the oil storage tank disposed at the bottom of the working table for recycling.
It should be noted that the above description is only exemplified specific embodiments but not intended to limit the scope of this invention. Modifications, substitutions or variations may be conceived by those skilled in the art from the disclosure of the present application without departing from the concept, spirit and scope of this invention and shall be covered by the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201410844232.5 | Dec 2014 | CN | national |
