Clamp mechanism applied to linear cutting machine tool

Abstract

The invention belongs to the technical field of linear cutting, and particularly relates to a clamp mechanism applied to a linear cutting machine tool. The device comprises a machine tool, a movable wire frame is connected to the machine tool, and a vertical cutting wire is connected to the wire frame; the clamp assembly is fixedly mounted on the machine tool; the clamp assembly comprises a fixing frame, and the fixing frame is fixedly connected with a pair of clamping assemblies which are symmetrical up and down. The clamping assembly comprises a fixed seat, a rotating seat is rotationally connected into the fixed seat, a pair of clamping blocks are symmetrically and slidably connected to the rotating seat, and a limiting ring capable of moving up and down is connected to the rotating seat and used for driving the clamping blocks to move; a pair of rotating pieces is symmetrically connected to the fixing frame, a driving mechanism is installed on the fixing frame, and the driving mechanism comprises a lifting frame; according to the clamp assembly, the two clamping assemblies are arranged, a workpiece is clamped through one clamping assembly, then the position of the other clamping assembly is adjusted, and therefore the situation that the stroke of a cutting line is hindered is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of wire cutting equipment, and in particular to a clamp mechanism applied to a wire cutting machine tool. Background Art

[0002] The wire cutting machine is mainly composed of three parts: machine tool, CNC system and high-frequency power supply. The CNC system is composed of a single-chip microcomputer, keyboard, and frequency conversion detection system, and has the main functions of gap compensation, linear interpolation, circular interpolation, and automatic wire breakage processing. It can cut materials such as high-strength, high-toughness, high-hardness, high-brittleness, and magnetic materials, as well as precision, small, and complex-shaped parts. Wire cutting technology and wire cutting machine tools are being widely used in all walks of life. When the machine tool is cutting the workpiece, in order to ensure the stability of the workpiece position, a fixture is needed to clamp the workpiece.

[0003] When the wire cutting machine is processing a workpiece, when the cutting wire needs to fully process the circumference of the workpiece, the cutting wire needs to move a circle along the circumference of the workpiece. The existing fixture generally adopts a method of clamping and fixing the circumference of the workpiece. The traditional fixture will hinder the travel of the cutting wire, thereby hindering the workpiece processing. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a clamping mechanism for a wire cutting machine tool. By providing a pair of clamping assemblies, the two clamping assemblies can adjust their positions in succession to avoid obstruction to the cutting line travel, aiming to solve the problems in the background technology.

[0005] In order to achieve the above technical objectives, the specific technical scheme of the present invention is as follows: a clamp mechanism applied to a wire cutting machine tool proposed by the present invention comprises: a machine tool, a movable wire rack is connected to the machine tool, and a vertical cutting wire is connected to the wire rack; a clamp assembly is fixedly installed on the machine tool; the clamp assembly comprises a fixed frame, and the fixed frame is fixedly connected to a pair of clamping assemblies symmetrical up and down, both of which are used to clamp and fix the workpiece; the clamping assembly comprises a fixed seat, a rotating seat is rotatably connected inside the fixed seat, a pair of clamping blocks are symmetrically and slidably connected to the rotating seat, and a limit ring that can move up and down is connected to the rotating seat, which is used to drive the clamping block to move; a pair of rotating parts are symmetrically connected to the fixed frame, and a driving mechanism is installed on the fixed frame, and the driving mechanism comprises a lifting frame, and when the lifting frame is lifted or lowered, the rotating seat is driven to rotate by the rotating parts to change the position of the clamping block.

[0006] As a preferred technical solution of the present invention, the rotating member is coaxially connected to a rotating cylinder, a spiral groove is provided on the surface of the rotating cylinder, a guide rod matching the spiral groove is fixedly connected to the lifting frame, and a sliding part is provided at the end of the guide rod.

[0007] As a preferred technical solution of the present invention, an annular gear ring is fixedly connected to the rotating seat; the rotating member includes: an outer gear ring, meshing with the annular gear ring; a ratchet, rotatably connected to the inner periphery of the outer gear ring, and the ratchet is coaxially fixedly connected to the rotating cylinder; a pawl, connected to the inner wall of the outer gear ring, and a first elastic member is connected between the pawl and the inner wall of the outer gear ring.

[0008] As a preferred technical solution of the present invention, a second elastic member is fixedly connected between the limiting ring and the rotating seat, and a pressing frame for driving the limiting ring to move is fixedly connected to the lifting frame.

[0009] As a preferred technical solution of the present invention, the surface of the clamping block is provided with an inclined surface, the inclined surface is provided with a groove, and the inner surface of the limiting ring is provided with a sliding shaft slidably connected to the groove.

[0010] As a preferred technical solution of the present invention, a pressing block is fixedly connected to the clamping block, and a sliding groove slidably connected to the clamping block is provided on the rotating seat.

[0011] As a preferred technical solution of the present invention, a driving motor is fixedly mounted on the fixing frame, a lead screw is connected to the driving motor, and the lifting frame is threadedly connected to the lead screw.

[0012] As a preferred technical solution of the present invention, a water spray pipe is connected to the wire rack to cool the workpiece.

[0013] The beneficial effects of the present invention are as follows: the present invention is provided with two clamping assemblies and two rotating parts. When the lifting frame moves upward, the clamping block on the upper clamping assembly automatically releases the workpiece, and the lifting frame drives the rotating seat to rotate through the rotating part, thereby changing the position of the clamping block; similarly, when the lifting frame moves downward, the position of the clamping block on the lower clamping assembly is adjusted, thereby adjusting the position of the clamping blocks on the two clamping assemblies while ensuring the stability of the workpiece position, thereby avoiding obstruction of the cutting line stroke by the clamp assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic structural diagram of a clamp mechanism applied to a wire cutting machine tool.

[0015] Figure 2 This is a schematic structural diagram of the clamp assembly proposed in the present invention.

[0016] Figure 3 This is a schematic structural diagram of the clamping assembly proposed in the present invention.

[0017] Figure 4 This is a schematic diagram from another angle of the clamping assembly proposed by the present invention.

[0018] Figure 5 This is a schematic diagram of the limiting ring and the clamping block proposed in the present invention.

[0019] Figure 6 This is a schematic diagram of the rotating member and the rotating cylinder proposed in the present invention.

[0020] Figure 7 This is a schematic structural diagram of the rotating part proposed in the present invention.

[0021] Figure 8 This is a schematic diagram of the structure of the driving mechanism proposed in the present invention.

[0022] In the figure: 1, machine tool; 2, wire rack; 3, cutting wire; 4, water spray pipe; 5, fixture assembly; 51, clamping assembly; 511, fixed seat; 512, rotating seat; 513, annular gear ring; 514, limiting ring; 5141, sliding shaft; 515, clamping block; 5151, pressing block; 5152, inclined surface; 5153, groove; 516, slide groove; 517, second elastic member; 52, fixed frame; 53, driving mechanism; 531, lifting frame; 532, guide rod; 533, sliding part; 534, pressing frame; 535, screw rod; 536, driving motor; 54, rotating member; 541, outer gear ring; 542, ratchet; 543, pawl; 544, first elastic member; 545, rotating cylinder; 546, spiral groove. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Embodiment: This embodiment discloses a clamping mechanism applied to a wire cutting machine tool, such as Figure 1-Figure 8 As shown, it includes: a machine tool 1, a movable wire rack 2 is connected to the machine tool 1, the wire rack 2 can move left and right and front and back to cut the workpiece, and a vertical cutting wire 3 is connected to the wire rack 2; a fixture assembly 5 is fixedly installed on the machine tool 1; a water spray pipe 4 is connected to the wire rack 2 for cooling the workpiece, and the water spray pipe 4 is connected to the water pipe.

[0025] like Figure 2-Figure 4As shown, the clamp assembly 5 includes a fixed frame 52, which is fixedly connected to the machine tool 1, and the fixed frame 52 is fixedly connected to a pair of upper and lower symmetrical clamping assemblies 51, both of which are used to clamp and fix the round rod-shaped workpiece; when it is necessary to adjust the position of the upper clamping assembly 51, the workpiece can be clamped and fixed by the lower clamping assembly 51, and then the position of the upper clamping assembly 51 can be adjusted; similarly, when it is necessary to adjust the position of the lower clamping assembly 51, the workpiece can be clamped and fixed by the upper clamping assembly 51, and then the position of the lower clamping assembly 51 can be adjusted, so as to avoid obstruction to the travel of the cutting line 3; the clamping assembly 51 includes a fixed seat 511, and the fixed seat 511 and the fixed The fixed frame 52 is fixedly connected, and a rotating seat 512 is rotatably connected inside the fixed seat 511. The rotating seat 512 and the fixed seat 511 are both annular structures, wherein an annular gear ring 513 is fixedly connected to the rotating seat 512; a pair of clamping blocks 515 are symmetrically slidably connected to the rotating seat 512, and a sliding groove 516 is provided on the rotating seat 512 to be slidably connected to the clamping blocks 515. The clamping blocks 515 are used to clamp and fix the workpiece, and there is a gap between the workpiece and the inner wall of the rotating seat 512 when the workpiece is clamped, so as to facilitate the movement of the cutting line 3 and comprehensively process the circumference of the workpiece, and a limiting ring 514 that can move up and down is connected to the rotating seat 512 to drive the clamping blocks 515 to move.

[0026] like Figure 5 As shown, a second elastic member 517 is fixedly connected between the limiting ring 514 and the rotating seat 512, and the second elastic member 517 applies elastic force to the limiting ring 514. The second elastic member 517 can be a spring. A pressing frame 534 for driving the limiting ring 514 to move is fixedly connected to the lifting frame 531, and the limiting ring 514 is driven to approach the rotating seat 512 through the movement of the lifting frame 531; a slope 5152 is provided on the surface of the clamping block 515, and a groove 5153 is provided on the slope 5152. The inner surface of the limiting ring 514 is provided with a groove 5153 that slides with the groove 5153 The connected sliding shaft 5141 is fixedly connected with a pressure block 5151 on the clamping block 515, which is used to clamp and fix the workpiece; when the limit ring 514 moves toward the rotating seat 512, it drives the two clamping blocks 515 away from each other and loosens the workpiece; when the limit ring 514 moves away from the rotating seat 512, it drives the two clamping blocks 515 close to each other and clamps the workpiece, and the second elastic member 517 is in a natural state, the limit ring 514 is in a state away from the rotating seat 512, and the two clamping blocks 515 are in a state of clamping the workpiece.

[0027] like Figure 6-Figure 7As shown, a pair of rotating members 54 are symmetrically connected to the fixed frame 52, and a driving mechanism 53 is installed on the fixed frame 52. The driving mechanism 53 includes a lifting frame 531. When the lifting frame 531 is lifted or lowered, the rotating seat 512 is driven to rotate through the rotating member 54, so as to change the position of the clamping block 515 and avoid the clamping block 515 from obstructing the travel of the cutting line 3; the rotating member 54 is coaxially connected to a rotating cylinder 545, and a spiral groove 546 is provided on the surface of the rotating cylinder 545. A guide rod 532 matched with the spiral groove 546 is fixedly connected to the lifting frame 531, and a sliding part 533 is provided at the end of the guide rod 532, and the sliding part 533 is slidably matched with the spiral groove 546; when the guide rod 532 moves along the spiral groove 546 to approach the rotating member When the guide rod 532 moves in the direction away from the rotating member 54 along the spiral groove 546, it drives the rotating cylinder 545 to rotate, and the rotating cylinder 545 drives the ratchet 542 to rotate, and the ratchet 542 drives the outer ring gear 541 to rotate. The outer ring gear 541 drives the rotating seat 512 to rotate through the annular ring gear 513, thereby changing the position of the clamping block 515; when the guide rod 532 moves along the spiral groove 546 away from the rotating member 54, it drives the rotating cylinder 545 to rotate, so that the rotating cylinder 545 rotates to the original position, which is convenient for the guide rod 532 to slide into the spiral groove 546 next time. At the same time, when the rotating cylinder 545 rotates, it drives the ratchet 542 to rotate. At this time, when the ratchet 542 rotates, it will not drive the outer ring gear 541 to rotate, thereby not driving the rotating seat 512 to rotate.

[0028] Among them, the rotating member 54 includes: an outer ring gear 541, which is meshed with the annular ring gear 513; a ratchet 542, which is rotatably connected to the inner periphery of the outer ring gear 541, and the ratchet 542 is coaxially fixedly connected to the rotating cylinder 545, and the ratchet 542 is driven to rotate when the rotating cylinder 545 rotates; a pawl 543, which is connected to the inner wall of the outer ring gear 541, and a first elastic member 544 is connected between the pawl 543 and the inner wall of the outer ring gear 541, and when the ratchet 542 rotates forward, it will not drive the outer ring gear 541 to rotate; when the ratchet 542 rotates reversely, it will drive the outer ring gear 541 to rotate.

[0029] like Figure 8 As shown, a driving motor 536 is fixedly installed on the fixed frame 52, and a screw rod 535 is connected to the driving motor 536, and the lifting frame 531 is threadedly connected to the screw rod 535; the driving motor 536 drives the screw rod 535 to rotate forward and reverse, and can drive the lifting frame 531 to rise and fall, thereby adjusting the position of the clamping blocks 515 on the two clamping components 51; when the lifting frame 531 is in the middle, the two clamping components 51 are in a state of clamping the workpiece.

[0030] Working principle: The present invention clamps and fixes the workpiece through the clamping assembly 5, and the cutting line 3 processes the circumference of the workpiece. When clamping, the clamping blocks 515 on the upper and lower clamping assemblies 51 are in the same straight line. During the cutting process, in order to prevent the clamping block 515 from affecting the stroke of the cutting line 3, the lifting frame 531 can be driven to move upward first by the driving mechanism 53. During the movement, the pressing frame 534 drives the limit ring 514 to move, so that the clamping block 515 of the upper clamping assembly 51 releases the workpiece, and at the same time, the guide rod 532 drives the rotating cylinder 545 to rotate, and drives the rotating seat 512 to rotate through the rotating member 54, thereby changing the position of the clamping block 515 of the upper clamping assembly 51; then the lifting frame 531 moves downward again to adjust the position of the clamping block 515 on the lower clamping assembly 51, thereby ensuring the stability of the workpiece position during the whole process, wherein the rotation angle of the upper and lower rotating seats 512 can be set to 90° each time, and during the whole processing process, the rotating seat 512 rotates four times, which is exactly one circle, and thus does not affect the stroke of the cutting line 3.

[0031] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clamping mechanism used in a wire cutting machine tool, characterized in that: include: A machine tool (1), the machine tool (1) is connected to a movable wire rack (2), and the wire rack (2) is connected to a vertical cutting wire (3); A fixture assembly (5) is fixedly mounted on the machine tool (1); The clamp assembly (5) comprises a fixing frame (52), and the fixing frame (52) is fixedly connected to a pair of upper and lower symmetrical clamping assemblies (51), both of which are used to clamp and fix the workpiece; The clamping assembly (51) comprises a fixed seat (511), a rotating seat (512) is rotatably connected inside the fixed seat (511), a pair of clamping blocks (515) are symmetrically slidably connected to the rotating seat (512), and a limit ring (514) capable of moving up and down is connected to the rotating seat (512) for driving the clamping blocks (515) to move; A pair of rotating members (54) are symmetrically connected to the fixed frame (52). A driving mechanism (53) is installed on the fixed frame (52). The driving mechanism (53) includes a lifting frame (531). When the lifting frame (531) is lifted or lowered, the rotating seat (512) is driven to rotate through the rotating member (54), thereby changing the position of the clamping block (515).

2. The clamping mechanism for a wire cutting machine tool according to claim 1, characterized in that The rotating member (54) is coaxially connected to a rotating cylinder (545), a spiral groove (546) is provided on the surface of the rotating cylinder (545), a guide rod (532) matched with the spiral groove (546) is fixedly connected to the lifting frame (531), and a sliding part (533) is provided at the end of the guide rod (532).

3. The clamping mechanism for a wire cutting machine tool according to claim 2, characterized in that: The rotating seat (512) is fixedly connected to an annular gear ring (513); the rotating member (54) comprises: an outer gear ring (541) meshing with the annular gear ring (513); a ratchet (542) rotatably connected to the inner periphery of the outer gear ring (541), the ratchet (542) being coaxially fixedly connected to a rotating cylinder (545); and a pawl (543) connected to the inner wall of the outer gear ring (541), a first elastic member (544) being connected between the pawl (543) and the inner wall of the outer gear ring (541).

4. The clamping mechanism for a wire cutting machine tool according to claim 3, characterized in that: A second elastic member (517) is fixedly connected between the limiting ring (514) and the rotating seat (512), and a pressing frame (534) for driving the limiting ring (514) to move is fixedly connected to the lifting frame (531).

5. The clamping mechanism for a wire cutting machine tool according to claim 4, characterized in that: The surface of the clamping block (515) is provided with an inclined surface (5152), the inclined surface (5152) is provided with a groove (5153), and the inner surface of the limiting ring (514) is provided with a sliding shaft (5141) slidably connected to the groove (5153).

6. The clamping mechanism for a wire cutting machine tool according to claim 5, characterized in that: The clamping block (5151) is fixedly connected to the clamping block (515), and the rotating seat (512) is provided with a sliding groove (516) slidably connected to the clamping block (515).

7. The clamping mechanism for a wire cutting machine tool according to claim 6, characterized in that: A driving motor (536) is fixedly mounted on the fixed frame (52), a screw rod (535) is connected to the driving motor (536), and the lifting frame (531) is threadedly connected to the screw rod (535).

8. The clamping mechanism for a wire cutting machine tool according to claim 7, characterized in that: The wire rack (2) is connected with a water spray pipe (4) for cooling the workpiece.

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