Auxiliary clamp for cutting off burr of electric spark machine tool

Abstract

The utility model provides a kind of auxiliary fixture for cutting off the rib of electric spark machine tool processing down knife, it is related to clamping structure technology, specifically discloses the main clamping arm installed on machine tool main arm, the side wall of main clamping arm is equipped with mounting seat, mounting seat is equipped with auxiliary clamping arm, the side wall of auxiliary clamping arm and main clamping arm is opposite and is equipped with clamping seat rotation, the side wall of two clamping seats is equipped with clamping groove, the side wall of auxiliary clamping arm or main clamping arm is equipped with the adjusting position structure for controlling the rotation of clamping seat, the side wall of auxiliary clamping arm or main clamping arm is equipped with assembly opening, the side wall of limit ball is equipped with shaft hole rotation in assembly opening, still include adjusting lever, adjusting lever is outwardly extended after being penetrated respectively in the shaft hole of two limit balls, adjusting lever realizes the adjustment of the distance between two arms, so that clamping or loosening workpiece, and the clamping seat of around main clamping arm or auxiliary clamping arm rotation carries out the processing demand of workpiece of different diameter and needing different processing angle.

Description

Technical Field

[0001] This utility model relates to the field of clamping structure technology, and more specifically, to an auxiliary clamp for cutting tendons in electrical discharge machining. Background Technology

[0002] Electrical discharge machining (EDM) is an important method for special processing of conductive materials using the principle of electrical erosion. The lead cutting process is a crucial step in the machining of precision parts such as semiconductor lead frames. In this process, the workpiece (such as a lead) needs to be precisely fixed and positioned so that the machine tool spindle can drive the cutting tool for precise cutting.

[0003] Currently, when machining bead cutting on EDM machines, traditional fixed fixtures or simple vise-type fixtures are often used to clamp the workpiece. These traditional fixtures have many drawbacks: First, their clamping angle is usually fixed. When the machining angle of the workpiece needs to be adjusted, the entire fixture must be disassembled and reinstalled for calibration, or even a special angle fixture may need to be replaced. This operation is cumbersome and time-consuming, and the adjustment accuracy is low, seriously affecting machining efficiency. Second, traditional fixtures have poor versatility. One type of fixture often only corresponds to one or a few specifications of workpieces. For workpieces with different diameters and requiring different machining angles, a large number of matching fixtures need to be prepared, increasing equipment costs and management complexity. Utility Model Content

[0004] The purpose of this utility model is to provide an auxiliary fixture for cutting tendons in electrical discharge machining, which addresses the shortcomings of existing technologies and solves the problems mentioned in the background.

[0005] The technical solution of this utility model is implemented as follows: This utility model provides an auxiliary fixture for cutting bead undercut in EDM machining, including a main clamping arm mounted on the main arm of the machine tool, a mounting base mounted on the side wall of the main clamping arm, a secondary clamping arm mounted on the mounting base, a clamping seat rotatably mounted on the side wall opposite to the main clamping arm, a clamping groove opened on the side wall opposite to the two clamping seats, an adjustment structure for controlling the rotation of the clamping seat on the side wall of the secondary clamping arm or the main clamping arm, an assembly opening opened on the side wall of the secondary clamping arm or the main clamping arm, a limiting ball rotatably mounted in the assembly opening, a shaft hole opened on the side wall of the limiting ball, and an adjusting rod, which extends outward after passing through the shaft hole located on the two limiting balls respectively, and the adjusting rod is detachably connected to the two limiting balls.

[0006] In some technical solutions of this utility model, the adjustment structure includes a shaft mounted on the clamping seat, and mounting holes are provided on the side walls of the auxiliary clamping arm or the main clamping arm. The shaft passes through the mounting holes, and a ratchet is mounted on the outer side wall of the shaft. Pads are mounted on the side walls of the auxiliary clamping arm or the main clamping arm, and the pads are partially embedded between any two adjacent ratchet teeth of the ratchet.

[0007] In some technical solutions of this utility model, a rotating shaft is provided on the secondary clamping arm, the rotating shaft is rotatably mounted on the mounting base, and a guide structure for guiding the rotation of the secondary clamping arm is provided between the secondary clamping arm and the mounting base.

[0008] In some technical solutions of this utility model, the guide structure includes an annular mounting channel disposed between the mounting base and the auxiliary clamping arm, a plurality of spheres are arranged around the annular mounting channel, and a through hole communicating with the mounting channel is opened on the side wall of the mounting base, and a sealing block is slidably disposed in the through hole.

[0009] In some technical solutions of this utility model, a limiting plate is installed in the clamping groove.

[0010] In some technical solutions of this utility model, a limiting ring is provided at one end of the adjusting rod, an external thread is provided on the outer wall of the adjusting rod, and an internal thread that meshes with the external thread is provided on the inner wall of one of the shaft holes.

[0011] In some technical solutions of this utility model, the side wall of the clamping groove is provided with concave and convex scratches.

[0012] In some technical solutions of this utility model, the cross-section of the clamping groove is V-shaped.

[0013] Compared to existing technologies, this invention has at least the following advantages or beneficial effects: The main clamping arm is mounted in the shaft hole on the machine tool main arm via a hexagonal shaft integrally formed with it. The clamping angle of the clamping structure on the workpiece can be adjusted according to processing requirements to adapt to different angle processing needs. The auxiliary clamping arm can rotate on the mounting seat on the main clamping arm, and then the distance between the two arms can be adjusted by the adjusting rod, thereby clamping or releasing the workpiece. This allows the structure to accommodate the clamping spacing required for different workpieces. The adjustment structure allows the clamping seat to perform a circular motion around a point on the main clamping arm or auxiliary clamping arm, ensuring that the angle of the clamping seat relative to the main clamping arm or auxiliary clamping arm can be firmly maintained after adjustment. Furthermore, the clamping seat rotating around the main clamping arm or auxiliary clamping arm can clamp workpieces of different diameters and requiring different processing angles, increasing the adaptability of the structure and reducing equipment costs and management complexity. Attached Figure Description

[0014] Figure 1 This is a top view of the auxiliary clamp in this utility model.

[0015] Figure 2 This is a three-dimensional structural diagram of the auxiliary clamp in this utility model.

[0016] Figure 3 This is a cross-sectional view of the auxiliary clamp in this utility model.

[0017] Figure 4 This is a cross-sectional view of the guide structure in this utility model.

[0018] Figure 5 This is a partially enlarged structural diagram of the clamping base in this utility model.

[0019] Reference numerals in the attached drawings: 1. Main clamping arm; 2. Secondary clamping arm; 3. Mounting base; 4. Clamping base; 5. Clamping groove; 6. Adjustment structure; 7. Assembly port; 8. Limiting ball; 9. Shaft hole; 10. Adjusting rod; 11. Shaft; 12. Sealing block; 13. Ratchet; 14. Pad; 15. Rotating shaft; 16. Guide structure; 17. Limiting ring; 18. Ball; 19. Limiting plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0022] Example This utility model provides an auxiliary fixture for the cutting tool in electrical discharge machining (EDM), such as... Figures 1-5As shown, the machine tool includes a main clamping arm 1 mounted on the main arm of the machine tool. The main clamping arm 1 is installed in a shaft hole 9 on the main arm of the machine tool via a hexagonal shaft 11 integrally formed with it, and then locked onto the main arm of the machine tool by a screw. A mounting base 3 is installed on the side wall of the main clamping arm 1, and a secondary clamping arm 2 is provided on the mounting base 3. The main clamping arm 1 is fixed to the machine tool to form a fixed fulcrum. The secondary clamping arm 2 can rotate on the mounting base 3 on the main clamping arm 1, and then the distance between the two arms can be adjusted by adjusting the adjusting rod 10, thereby clamping or releasing the workpiece. The auxiliary clamping arm 2 and the main clamping arm 1 are each provided with a clamping seat 4 on their opposite sidewalls. Each of the two clamping seats 4 is provided with a clamping groove 5 on its opposite sidewall. The auxiliary clamping arm 2 or the main clamping arm 1 is provided with an adjustment structure 6 for controlling the rotation of the clamping seat 4. The adjustment structure 6 makes the clamping seat 4 rotate around a point on the main clamping arm 1 or the auxiliary clamping arm 2, and ensures that the clamping seat 4 can be firmly maintained after the angle of the clamping seat 4 relative to the main clamping arm 1 or the auxiliary clamping arm 2 is adjusted. Both the auxiliary clamping arm 2 and the main clamping arm 1 have semi-circular assembly openings 7 on their side walls. Each assembly opening 7 contains a rotatable limiting ball 8. Each limiting ball 8 has a shaft hole 9 on its side wall. An adjusting rod 10 is also included, extending outwards through the shaft holes 9 located on the two limiting balls 8. The adjusting rod 10 is detachably connected to the two limiting balls 8. The adjusting rod 10 passes through a universal joint structure formed by the two limiting balls 8. This allows for adjusting the distance between the main clamping arm 1 and the auxiliary clamping arm 2 without affecting the freedom of angle adjustment between them. Furthermore, tightening the adjusting rod 10 within the limiting balls 8 fixes the clamping distance between the main clamping arm 1 and the auxiliary clamping arm 2. With the adjustments made by the above structure, the clamping base 4 can accommodate workpieces of different lengths or diameters.

[0023] In some technical solutions of this utility model, the adjustment structure 6 includes a shaft 11 mounted on the clamping base 4. Mounting holes are provided on the side walls of the auxiliary clamping arm 2 or the main clamping arm 1, and the shaft 11 passes through the mounting holes. A ratchet 13 is mounted on the outer side wall of the shaft 11, and a pawl 14 is mounted on the side wall of the auxiliary clamping arm 2 or the main clamping arm 1. The pawl 14 is partially engaged between any two adjacent ratchet teeth of the ratchet 13. When the angle of the clamping base 4 needs to be adjusted, the clamping base 4 is rotated to overcome the resistance generated by the pawl 14, causing the clamping base 4 to rotate. Each time the ratchet 13 rotates one tooth pitch, the pawl 14 falls into the next tooth groove, making a "click" sound and positioning the clamping base 4. When locking is required, the pawl 14 naturally engages between the ratchet teeth to prevent reverse rotation. Furthermore, the ratchet 13 and pawl 14 mechanism effectively prevents the clamping base 4 from rotating unexpectedly due to vibration or external force during processing, enhancing the stability and safety of the processing.

[0024] In some technical solutions of this utility model, the auxiliary clamping arm 2 is provided with a rotating shaft 15, which is rotatably mounted on the mounting base 3. A guide structure 16 is provided between the auxiliary clamping arm 2 and the mounting base 3 to guide the rotation of the auxiliary clamping arm 2. Under the action of the guide structure 16 and the rotating shaft 15, the auxiliary clamping arm 2 rotates on the mounting base 3, which can make the rotation of the auxiliary clamping part smoother.

[0025] In some technical solutions of this utility model, the guide structure 16 includes an annular mounting channel disposed between the mounting base 3 and the auxiliary clamping arm 2. A plurality of spheres 18 are arranged around the annular mounting channel. A through hole communicating with the mounting channel is opened on the side wall of the mounting base 3, and a sealing block 12 is slidably disposed within the through hole. When the auxiliary clamping arm 2 rotates, the spheres 18 in the annular mounting channel roll, greatly reducing the frictional resistance when the main clamping arm 1 and the auxiliary clamping arm 2 move relative to each other. The through hole and the sealing block 12 are used for installing and maintaining these spheres 18, improving the maintenance efficiency of this structure. Furthermore, when the auxiliary clamping arm 2 rotates at a certain angle, the spheres 18 push up the sealing block 12, generating an impact sound that can alert the operator and determine the rotation angle of the auxiliary clamping arm 2 relative to the main clamping arm 1.

[0026] In some technical solutions of this utility model, a limiting plate 19 is installed in the clamping groove 5. After the workpiece is placed in the clamping groove 5, it is axially positioned by the limiting plate 19, which provides an axial positioning reference surface, restricts the movement of the workpiece along its axial direction, ensures that the workpiece will not move axially during the clamping process, and avoids repeated positioning when clamping the workpiece.

[0027] In some technical solutions of this utility model, a limiting ring 17 is provided at one end of the adjusting rod 10, and an external thread is provided on the outer wall of the adjusting rod 10. An internal thread that meshes with the external thread is provided on the inner wall of one of the shaft holes 9. When the adjusting rod 10 is rotated, since one end is connected to a limiting ball 8 by a thread and the other end is blocked by the limiting ring 17, the rotation action is converted into axial movement of the adjusting rod 10, thereby pulling or pushing the two clamping arms and changing their distance. When tightening, the threaded pair causes the adjusting rod 10 to move axially and self-locks, ensuring that it is not easy to retract after the distance between the main clamping arm 1 and the secondary clamping arm 2 changes.

[0028] In some technical solutions of this utility model, the sidewall of the clamping groove 5 is provided with raised and recessed scratches. When the workpiece is pressed into the clamping groove 5, the raised and recessed scratches on the groove wall will slightly embed into the workpiece surface, effectively preventing the workpiece from slipping or rotating during processing, and enhancing the reliability and stability of clamping. In some technical solutions of this utility model, the cross-section of the clamping groove 5 is V-shaped. Utilizing the V-shaped groove for self-centering of the workpiece simplifies the clamping operation, facilitates rapid positioning of the workpiece during clamping, and improves clamping efficiency and centering accuracy.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An auxiliary fixture for cutting wires using an electrical discharge machine tool, characterized in that, The system includes a main clamping arm (1) mounted on the main arm of a machine tool. A mounting base (3) is mounted on the side wall of the main clamping arm (1). A secondary clamping arm (2) is provided on the mounting base (3). A clamping seat (4) is rotatably provided on the side wall of the secondary clamping arm (2) opposite to the main clamping arm (1). A clamping groove (5) is provided on the side wall of the two clamping seats (4) opposite to each other. A control clamping seat is provided on the side wall of the secondary clamping arm (2) or the main clamping arm (1). (4) Rotational adjustment structure (6), the side wall of the auxiliary clamping arm (2) or the main clamping arm (1) is provided with an assembly port (7), the assembly port (7) is provided with a rotatable limit ball (8), the side wall of the limit ball (8) is provided with a shaft hole (9), and also includes an adjustment rod (10), the adjustment rod (10) extends outward after passing through the shaft hole (9) located on the two limit balls (8), and the adjustment rod (10) is detachably connected to the two limit balls (8).

2. The auxiliary fixture for cutting bead in electrical discharge machining according to claim 1, characterized in that, The adjustment structure (6) includes a shaft (11) mounted on the clamping seat (4). The side wall of the auxiliary clamping arm (2) or the main clamping arm (1) is provided with a mounting hole. The shaft (11) passes through the mounting hole. A ratchet (13) is mounted on the outer side wall of the shaft (11). A pawl (14) is mounted on the side wall of the auxiliary clamping arm (2) or the main clamping arm (1). The pawl (14) is partially embedded between any two adjacent ratchet teeth of the ratchet (13).

3. The auxiliary fixture for cutting bead in electrical discharge machining according to claim 1, characterized in that, The auxiliary clamping arm (2) is provided with a rotating shaft (15), which is rotatably mounted on the mounting base (3). A guide structure (16) for guiding the rotation of the auxiliary clamping arm (2) is provided between the auxiliary clamping arm (2) and the mounting base (3).

4. The auxiliary fixture for cutting bead in electrical discharge machining according to claim 3, characterized in that, The guide structure (16) includes an annular mounting channel between the mounting base (3) and the auxiliary clamping arm (2), and a plurality of spheres (18) are arranged around the annular mounting channel. A through hole communicating with the mounting channel is opened on the side wall of the mounting base (3), and a sealing block (12) is slidably arranged in the through hole.

5. An auxiliary fixture for cutting bead undercutting on an EDM machine tool according to claim 1, characterized in that, A limiting plate (19) is installed in the clamping groove (5).

6. An auxiliary fixture for cutting bead in electrical discharge machining according to claim 1, characterized in that, One end of the adjusting rod (10) is provided with a limiting ring (17), and an external thread is provided on the outer wall of the adjusting rod (10), and an internal thread that meshes with the external thread is provided on the inner wall of one of the shaft holes (9).

7. An auxiliary fixture for cutting bead in electrical discharge machining according to claim 1, characterized in that, The side wall of the clamping groove (5) is provided with concave and convex scratches.

8. An auxiliary fixture for cutting bead in electrical discharge machining according to claim 1, characterized in that, The clamping groove (5) has a V-shaped cross-section.

Images