High-precision molybdenum wire adjusting integrated mechanism of linear cutting machine tool

Abstract

The high-precision molybdenum wire adjusting integrated mechanism of the linear cutting machine tool comprises a machine tool main arm and a molybdenum wire swing center mechanism, and the molybdenum wire swing center mechanism comprises a driving swing arm assembly and a driven swing arm assembly; the driving swing arm assembly comprises a driving shaft and a driving shaft sleeve, the driving shaft and the driving shaft sleeve are coaxially arranged and form rotating connection, and the driving shaft sleeve is fixed to a machine tool. The driven swing arm assembly comprises a driven shaft and a driven shaft sleeve, the driven shaft and the driven shaft sleeve are coaxially arranged and rotationally connected, a driven wire guide head is fixed to one end of the driven shaft in the length direction, and the driven shaft sleeve is fixed to the machine tool main arm; a swing arm assembly is connected between the end, away from the driving wire guide head, of the driving shaft and the end, away from the driven wire guide head, of the driven shaft, and the driving swing arm assembly and the driven swing arm assembly can conduct axial dislocation movement through the swing arm assembly. And the inclination of the molybdenum wire can be randomly adjusted to adapt to cutting of workpieces in different shapes.

Description

Technical Field

[0001] This invention relates to a machine tool center positioning structure, specifically a high-precision molybdenum wire adjustment integrated mechanism for a wire EDM machine. Background Technology

[0002] In practical work, reciprocating wire EDM machines not only process straight-sided graphics, but also angled graphics and irregular shapes.

[0003] Most existing machine tools can only perform straight surface machining. To perform inclined and irregular surface machining, a cross slide (usually called U-axis or V-axis) must be installed on the Z-axis. Currently, people only add a simple swing mechanism, which can only perform inclined surface machining on the V-axis. As for the U-axis, it can only allow the molybdenum wire to change its trajectory freely, which means there is no directional trajectory guidance and it is not possible to perform back-and-forth polishing on the same trajectory. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision molybdenum wire adjustment integrated mechanism for wire EDM machines to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-precision molybdenum wire adjustment integrated mechanism for a wire EDM machine tool, comprising a machine tool main arm and a molybdenum wire swing center mechanism fixed on the machine tool main arm, wherein the molybdenum wire swing center mechanism comprises an active swing arm assembly and a driven swing arm assembly; The active swing arm assembly includes an active shaft and an active shaft sleeve. The active shaft and the active shaft sleeve are coaxially arranged and form a rotatable connection. An active guide wire head is fixed to one end of the active shaft in the length direction, and the active shaft sleeve is fixed to the machine tool. The driven swing arm assembly includes a driven shaft and a driven bushing. The driven shaft and the driven bushing are coaxially arranged and form a rotatable connection. A driven wire guide head is fixed at one end of the driven shaft along its length, and the driven bushing is fixed on the main arm of the machine tool. A swing arm assembly is connected between the end of the active shaft away from the active guide wire head and the end of the driven shaft away from the driven guide wire head. The active swing arm assembly and the driven swing arm assembly can move axially out of alignment through the swing arm assembly.

[0006] Preferably, the active guide wire head includes an active U-shaped block and an active rotating shaft, wherein the active rotating shaft is disposed in the groove of the active U-shaped block and forms a rotatable connection with the active U-shaped block; The driven guide wire head includes a driven U-shaped block and a driven rotating shaft. The driven rotating shaft is disposed in the groove of the driven U-shaped block and forms a rotatable connection with the driven U-shaped block. Both the driven rotating shaft and the driven rotating shaft are provided with gemstone heads for the molybdenum wire to pass through.

[0007] Preferably, the active rotating shaft is provided with an active side arm on one side of the gem head, and the active side arm is provided with an upper guide wheel for guiding the molybdenum wire on the side away from the active rotating shaft; The driven side arm is located on one side of the jewel head, and a lower guide wheel for guiding the molybdenum wire is located on the side of the driven side arm away from the driven shaft.

[0008] Preferably, the swing arm assembly includes an upper base block, a lower base block, an upper connecting rod assembly, a lower connecting rod assembly, and a swing arm. An upper roller shaft is rotatably connected inside the upper base block, and a lower roller shaft is rotatably connected inside the lower base block. The lower end of the swing arm is fixedly connected to the lower roller shaft, and the upper end passes through the upper roller shaft and forms a sliding connection with the upper roller shaft. One end of the upper connecting rod assembly is hinged to the axial extension of the driving shaft, and the other end is hinged to the axial extension of the upper roller shaft. One end of the lower connecting rod assembly is hinged to the axial extension of the driven shaft, and the other end is hinged to the axial extension of the lower roller shaft.

[0009] Preferably, a guide sleeve is provided at the radial position of the upper roller shaft, and the upper end of the swing rod passes through the guide sleeve and forms a sliding connection with the guide sleeve.

[0010] Preferably, the upper connecting rod assembly includes an active swing arm, an active rear swing arm, and an active pull rod. One end of the active front swing arm is hinged to one end of the axial extension of the active rotating shaft, and the other end is hinged to one end of the length of the pull rod. One end of the active rear swing arm is hinged to one end of the axial extension of the upper roller shaft, and the other end is hinged to the end of the pull rod away from the active front swing arm.

[0011] Preferably, the lower connecting rod assembly includes a driven swing arm, a driven rear swing arm, and a driven pull rod. One end of the driven front swing arm is hinged to one end of the axial extension of the driven rotating shaft, and the other end is hinged to one end of the length of the pull rod. One end of the driven rear swing arm is hinged to one end of the axial extension of the lower roller shaft, and the other end is hinged to the end of the pull rod away from the driven front swing arm.

[0012] Preferably, the upper base block has an active rear guide wheel corresponding to the active guide wheel at its tail end, and the lower base block has a molybdenum wire guide wheel assembly corresponding to the lower guide wheel at its tail end.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting up an active swing arm assembly, a driven swing arm assembly, and a swing arm assembly, the tilt angle can be changed when the molybdenum wire is pulled along the UVZ axis of the cutting machine tool, achieving multi-degree-of-freedom adjustment and enabling the cutting machine tool to adapt to the cutting of workpieces of different shapes. The swing arm assembly includes an upper base block, a lower base block, an upper connecting rod assembly, a lower connecting rod assembly, and a swing arm, which enables the active swing arm assembly and the driven swing arm assembly to maintain a corresponding movement relationship. When the UVZ axis of the cutting machine moves to pull the molybdenum wire, it will cause the active swing arm assembly to maintain the cutting center of the molybdenum wire to remain unchanged, thereby improving the cutting accuracy of the cutting machine on the workpiece. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 This is a schematic diagram of the overall structure of the molybdenum wire swing center mechanism in this embodiment; Figure 3 This is an exploded view of the drive shaft, drive shaft sleeve, driven shaft, and driven shaft sleeve in this embodiment; Figure 4 This is an exploded view of the swing assembly in this embodiment; Figure 5 This is an exploded view of the active guidewire head and the driven guidewire head in this embodiment.

[0016] The attached diagram lists the components represented by each number as follows: 1. Machine tool main arm; 2. Molybdenum wire swing center mechanism; 21. Active swing arm assembly; 211. Driven shaft; 212. Driven bushing; 213. Active wire guide head; 2131. Active U-block; 2132. Driven rotating shaft; 22. Driven swing arm assembly; 221. Driven shaft; 222. Driven bushing; 223. Driven wire guide head; 2231. Driven U-block; 2232. Driven rotating shaft; 4. Jewel head; 5. Active side arm; 6. Upper guide wheel; 7. Driven... 8. Side arm; 9. Lower guide wheel; 10. Swing arm assembly; 11. Upper base block; 12. Lower base block; 13. Upper connecting rod assembly; 14. Active front swing arm; 15. Active rear swing arm; 16. Active tie rod; 17. Lower connecting rod assembly; 18. Driven front swing arm; 19. Driven rear swing arm; 10. Driven tie rod; 11. Swing rod; 12. Upper roller shaft; 13. Lower roller shaft; 14. Guide sleeve; 15. Active rear guide wheel; 16. Molybdenum wire guide wheel assembly; 17. Mounting part. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-5 The present invention provides a technical solution: This embodiment discloses a high-precision molybdenum wire adjustment integrated mechanism for a wire EDM machine. Its core is the rational arrangement of the connection and positional relationships between the active swing arm assembly 21, the driven swing arm assembly 22, and the swing arm assembly 9, achieving high-precision multi-degree-of-freedom adjustment of the molybdenum wire to meet the cutting requirements of workpieces with different shapes. The molybdenum wire swing center mechanism 2 is integrally assembled on the wire EDM machine. Specifically, the molybdenum wire swing center mechanism 2 consists of the cooperating active swing arm assembly 21 and the driven swing arm assembly 22. The active swing arm assembly 21 and the driven swing arm are linked through the swing arm assembly 9 to ensure the coordination and precision of the movement.

[0019] The active swing arm assembly 21 is assembled as follows: the active shaft 211 and the active shaft sleeve 212 are assembled in a coaxial manner, forming a rotatable connection between the active shaft 211 and the active shaft sleeve 212, so that the active shaft 211 can rotate flexibly; the active shaft sleeve 212 is provided with a mounting part 15 on the outside, and the mounting part 15 is securely installed on the UVZ axis moving mechanism by conventional fixing methods such as bolts (the UVZ axis moving mechanism is an existing mechanism that moves the active shaft sleeve 22 in three directions of U axis, V axis and Z axis by pulling the mounting part 15), providing a stable mounting base for the entire active swing arm assembly 21; one end of the active shaft 211 in the length direction is fixedly connected to the active guide wire head 213 to ensure that the two move synchronously. The active guide head 213 is specifically composed of an active U-shaped block and an active rotating shaft 2132. The active rotating shaft 2132 is fitted and installed in the groove of the active U-shaped block and forms a rotatable connection with the active U-shaped block. At the same time, a gem head 4 for passing through the molybdenum wire is fixedly installed on the active rotating shaft 2132 for precise positioning of the molybdenum wire. An active side arm 5 is integrally formed on one side of the active rotating shaft 2132 located at the gem head 4. The side of the active side arm 5 away from the active rotating shaft 2132 is connected to an upper guide wheel 6 through a rotating shaft. The upper guide wheel 6 is used to guide the movement trajectory of the molybdenum wire, so that the molybdenum wire passes more accurately through the center of the gem head 4 (an existing component for guiding the molybdenum wire).

[0020] The driven swing arm assembly 22 is located below the active swing arm assembly 21. During molybdenum wire cutting of the workpiece, the workpiece is fixed on the clamping table, which is horizontally positioned between the active swing arm assembly 21 and the driven swing arm assembly 22. After the workpiece is clamped and fixed by the clamping table, the machine tool can control the clamping table to move freely in the horizontal direction (the control method is the existing method). The driven swing arm assembly 22 is assembled as follows: the driven shaft 221 and the driven bushing 222 are coaxially assembled and form a rotatable connection. The driven bushing 222 is also fixed on the main arm 1 of the machine tool. A driven wire guide head 223 is fixed to one end of the driven shaft 221 along its length. The driven wire guide head 223 consists of a driven U-shaped block and a driven rotating shaft 2232. The driven rotating shaft 2232 is mounted on the driven U-shaped block. The groove of the block forms a rotating connection, and the driven shaft 2232 is also equipped with a gem head 4 with the same structure as the gem head 4 on the active shaft 2132; a driven side arm 7 is fixed on one side of the driven shaft 2232 located at the gem head 4, and a lower guide wheel 8 is connected to the side of the driven side arm 7 away from the driven shaft 2232 through a shaft. The lower guide wheel 8 cooperates with the upper guide wheel 6 to jointly achieve full-process guidance of the molybdenum wire.

[0021] The swing arm assembly 9 serves as a linkage structure connecting the active swing arm assembly 21 and the driven swing arm assembly 22. The specific assembly relationship is as follows: The swing arm assembly 9 includes an upper base block 91, a lower base block 92, an upper connecting rod assembly 93, a lower connecting rod assembly 94, and a swing arm 95. The upper base block 91 and the lower base block 92 are arranged in parallel and spaced apart. The upper base block 91 is rotatably connected to the upper roller shaft 10 through a bearing, and the lower base block 92 is rotatably connected to the lower roller shaft 11 through a bearing. The lower end of the swing arm 95 is fixed to the lower roller shaft 11 by welding or pin connection, and the upper end passes through the guide sleeve 12 preset at the radial position of the upper roller shaft 10. The swing arm 95 and the guide sleeve 12 form a sliding connection, so that the swing arm 95 can slide up and down relative to the upper roller shaft 10 while driving the lower roller shaft 11 to rotate.

[0022] The upper connecting rod assembly 93 consists of an active front swing arm 931, an active rear swing arm 932, and an active pull rod 933. One end of the active front swing arm 931 is hinged to the axial extension of the active rotating shaft 2132, and the other end is hinged to one end of the active pull rod 933. One end of the active rear swing arm 932 is hinged to the axial extension of the upper roller shaft 10, and the other end is hinged to the end of the active pull rod 933 away from the active front swing arm 931. Through this hinge structure, the linkage between the active rotating shaft 2132 and the upper roller shaft 10 is realized. The lower connecting rod assembly 94 has the same structure as the upper connecting rod assembly 93, consisting of a driven front swing arm 941, a driven rear swing arm 942, and a driven pull rod 943. One end of the driven front swing arm 941 is hinged to the axial extension of the driven rotating shaft 2232, and the other end is hinged to one end of the driven pull rod 943. One end of the driven rear swing arm 942 is hinged to the axial extension of the lower roller shaft 11, and the other end is hinged to the end of the driven pull rod 943 away from the driven front swing arm 941, thereby realizing the linkage between the driven rotating shaft 2232 and the lower roller shaft 11. In addition, an active rear guide wheel 13 is connected to the tail end of the upper base block 91 via a rotating shaft. The active rear guide wheel 13 corresponds to the position of the upper guide wheel 6 and is used to further optimize the guiding path of the molybdenum wire. A molybdenum wire guide wheel assembly 14 is assembled at the tail end of the lower base block 92. The molybdenum wire guide wheel assembly 14 corresponds to the position of the lower guide wheel 8 and cooperates with the active rear guide wheel 13 to form a complete molybdenum wire guiding system.

[0023] In actual operation, when the cutting machine tool changes the inclination of the molybdenum wire according to the needs of the workpiece being cut, this can be achieved by moving each axis of the UVZ axis moving mechanism.

[0024] When the V-axis tilt of the molybdenum wire needs to be adjusted, the UVZ axis moving mechanism drives the mounting part 15 to move along the V-axis, the active bushing 212 moves along the V-axis and drives the swing arm 95 to rotate. When the active swing arm assembly 21 moves to one side, the driven swing arm assembly 22 will move to the opposite side through the linkage of the swing arm 95, thereby realizing the adjustment of the V-axis tilt of the molybdenum wire.

[0025] When the U-axis tilt of the molybdenum wire needs to be adjusted, the UVZ axis moving mechanism drives the active swing arm assembly 21 to move in the U-axis direction through the mounting part 15. At this time, the active shaft 211 will rotate relative to the active shaft sleeve 212, and the swing arm 95 will follow the rotation in the U-axis direction. With the cooperation of the swing arm 95 and the lower roller shaft 11, the driven shaft 221 will be driven to rotate, thereby driving the driven wire guide head 223 to rotate, realizing the adjustment of the U-axis tilt. Since the active shaft 211 rotates relative to the active shaft sleeve 212 and the driven shaft 221 rotates relative to the driven shaft sleeve 222, the active shaft 211 and the driven shaft 221 rotate at the same angle under the action of the swing arm 95, so that the molybdenum wire is in a stable tilted state between the active wire guide head 213 and the driven wire guide head 223. When it is necessary to adjust the distance between the active guide head 213 and the driven guide head 223 to accommodate different workpieces, the mounting part 15 can be moved upward by the UVZ axis moving mechanism. At the same time, the upward movement of the mounting part 15 by the UVZ axis moving mechanism can also be coordinated with the horizontal movement to adjust the different tilt states of the molybdenum wire.

[0026] The molybdenum wire transmits force through the upper guide wheel 6, lower guide wheel 8, and gem head 4, thereby driving the active swing arm assembly 21 and the driven swing arm assembly 22. Through the linkage of the upper connecting rod assembly 93 and the lower connecting rod assembly 94, the active swing arm assembly 21 and the driven swing arm assembly 22 can achieve precise axial misalignment movement. Simultaneously, under the coordinated action of the swing arm 95, the cutting center of the molybdenum wire remains constant. This structural design not only enables multi-degree-of-freedom adjustment of the molybdenum wire, meeting the processing requirements of straight, inclined, and irregularly shaped workpieces, but also effectively improves the processing accuracy of the wire EDM machine through the coordinated cooperation of various components, solving the problems of traditional mechanisms' inability to provide directional trajectory guidance and back-and-forth polishing.

[0027] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision molybdenum wire adjustment integrated mechanism for a wire EDM machine, comprising the main arm of the machine tool (1), characterized in that: It also includes a molybdenum wire swing center mechanism (2) fixed on the main arm (1) of the machine tool, the molybdenum wire swing center mechanism (2) including an active swing arm assembly (21) and a driven swing arm assembly (22). The active swing arm assembly (21) includes an active shaft (211) and an active bushing (212). The active shaft (211) and the active bushing (212) are coaxially arranged and form a rotatable connection. An active guide wire head (213) is fixed at one end of the active shaft (211) in the length direction, and the active bushing (212) is fixed on the machine tool. The driven swing arm assembly (22) includes a driven shaft (221) and a driven bushing (222). The driven shaft (221) and the driven bushing (222) are coaxially arranged and form a rotatable connection. A driven guide wire head (223) is fixed at one end of the driven shaft (221) in the length direction. The driven bushing (222) is fixed on the main arm (1) of the machine tool. A swing arm assembly (9) is connected between the end of the active shaft (211) away from the active guide wire head (213) and the end of the driven shaft (221) away from the driven guide wire head (223). The active swing arm assembly (21) and the driven swing arm assembly (22) can move axially through the swing arm assembly (9).

2. The integrated high-precision molybdenum wire adjustment mechanism for a wire EDM machine tool according to claim 1, characterized in that: The active guide wire head (213) includes an active U-shaped block (2131) and an active rotating shaft (2132). The active rotating shaft (2132) is disposed in the groove of the active U-shaped block (2131) and forms a rotatable connection with the active U-shaped block. The driven guide wire head (223) includes a driven U-shaped block (2231) and a driven rotating shaft (2232). The driven rotating shaft (2232) is disposed in the groove of the driven U-shaped block (2231) and forms a rotatable connection with the driven U-shaped block. Both the driving rotating shaft (2132) and the driven rotating shaft (2232) are provided with gemstone heads (4) for the molybdenum wire to pass through.

3. The integrated high-precision molybdenum wire adjustment mechanism for a wire EDM machine tool according to claim 2, characterized in that: The active rotating shaft (2132) is provided with an active side arm (5) on one side of the gem head (4), and an upper guide wheel (6) for guiding the molybdenum wire is provided on the side of the active side arm (5) away from the active rotating shaft (2132). The driven side arm (7) is provided on the side of the driven shaft located on the gem head (4), and the driven side arm (7) is provided on the side away from the driven shaft (2232) for guiding the molybdenum wire.

4. The integrated high-precision molybdenum wire adjustment mechanism for a wire EDM machine tool according to claim 3, characterized in that: The swing arm assembly (9) includes an upper base block (91), a lower base block (92), an upper connecting rod assembly (93), a lower connecting rod assembly (94), and a swing rod (95). An upper roller shaft (10) is rotatably connected inside the upper base block (91), and a lower roller shaft (11) is rotatably connected inside the lower base block (92). The lower end of the swing rod (95) is fixedly connected to the lower roller shaft (11), and the upper end passes through the upper roller shaft (10) and forms a sliding connection with the upper roller shaft (10). One end of the upper connecting rod assembly (93) is hinged to the axial extension of the active rotating shaft (2132), and the other end is hinged to the axial extension of the upper roller shaft (10). One end of the lower connecting rod assembly (94) is hinged to the axial extension of the driven shaft (221), and the other end is hinged to the axial extension of the lower roller shaft (11).

5. The integrated high-precision molybdenum wire adjustment mechanism for a wire EDM machine tool according to claim 4, characterized in that: The upper roller shaft (10) is provided with a guide sleeve (12) at a radial position. The upper end of the swing rod (95) passes through the guide sleeve (12) and forms a sliding connection with the guide sleeve (12).

6. The integrated high-precision molybdenum wire adjustment mechanism for a wire EDM machine tool according to claim 4, characterized in that: The upper connecting rod assembly (93) includes an active swing arm, an active rear swing arm (932) and an active pull rod (933). One end of the active front swing arm (931) is hinged to one end of the axial extension of the active rotating shaft (2132) and the other end is hinged to one end of the length of the pull rod. One end of the active rear swing arm (932) is hinged to one end of the axial extension of the upper roller shaft (10) and the other end is hinged to the end of the pull rod away from the active front swing arm (931).

7. The integrated high-precision molybdenum wire adjustment mechanism for a wire EDM machine tool according to claim 4, characterized in that: The lower link assembly (94) includes a driven swing arm, a driven rear swing arm (942) and a driven pull rod (943). One end of the driven front swing arm (941) is hinged to one end of the axial extension of the driven rotating shaft (2232) and the other end is hinged to one end of the length of the pull rod. One end of the driven rear swing arm (942) is hinged to one end of the axial extension of the lower roller shaft (11) and the other end is hinged to the end of the pull rod away from the driven front swing arm (941).

8. The integrated high-precision molybdenum wire adjustment mechanism for a wire EDM machine tool according to claim 4, characterized in that: The upper base block (91) is provided with an active rear guide wheel (13) corresponding to the active guide wheel at its tail end, and the lower base block (92) is provided with a molybdenum wire guide wheel group (14) corresponding to the lower guide wheel (8) at its tail end.

Images