A clamping and positioning mechanism for an electric spark drilling machine

Abstract

The utility model discloses a kind of electric spark drilling machine clamping positioning mechanism, including the first clamping component and the second clamping component distributed along hollow copper pipe axial direction, the first clamping component and the second clamping component structure are same, including screw sleeve, clamping rod articulated in screw sleeve outer side, convex ring sleeved in the periphery of screw sleeve, support rod articulated between convex ring and clamping rod and the rotating sleeve of screw thread joint in the periphery of screw sleeve, screw sleeve top end is rotatably connected with convex ring, the lower end of the screw sleeve of second clamping component is fixed with screw pipe, and bracket is rotatably installed outside screw pipe, miniature motor is installed on the bracket, the screw thread joint of screw pipe lower end has screw cylinder, and straight rail is fixed outside this screw cylinder through support plate.The utility model is clamped to hollow copper pipe by the first, second clamping component of axial distribution, upper segment ball bearing support rotates, lower segment non-slip mat is fixed, effectively suppresses radial deflection in processing, improves deep hole machining accuracy.

Description

Technical Field

[0001] This utility model relates to the field of electrical discharge drilling equipment technology, and in particular to a clamping and positioning mechanism for an electrical discharge drilling machine. Background Technology

[0002] An electrical discharge drilling machine is a special processing equipment that uses the principle of electrical discharge to process micro-holes. Its core principle is to remove metal materials by generating high temperature through pulsed spark discharge. The electrode of the electrical pulse is a hollow copper tube, and high-pressure water passes through the fine hole in the middle of the copper tube to cool and remove chips.

[0003] When performing deep hole machining with an EDM drilling machine, the hollow copper tube needs to rotate synchronously and be fed axially. However, the copper tube clamping mechanism of the traditional EDM drilling machine only clamps the front end of the copper tube, which is in a cantilever state. When moving downward, due to gravity or vibration factors, the copper tube is prone to radial sway, which can easily cause the machined hole to be skewed, the copper tube to be worn, and affect the machining quality.

[0004] To address this issue, we propose a clamping and positioning mechanism for an electrical discharge drilling machine. Utility Model Content

[0005] The purpose of this utility model is to provide a clamping and positioning mechanism for an electrical discharge drilling machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An electric discharge drilling machine clamping and positioning mechanism includes a first clamping component and a second clamping component distributed along the axial direction of a hollow copper tube. The first clamping component has a plurality of balls rotatably embedded on the side of the hollow copper tube that is in contact with it, and the second clamping component has an anti-slip pad connected to the side of the hollow copper tube that is in contact with it.

[0008] The first clamping assembly and the second clamping assembly have the same structure, including a threaded sleeve, a clamping rod hinged to the outer edge of the threaded sleeve, a convex ring sleeved around the outer edge of the threaded sleeve, a support rod hinged between the convex ring and the clamping rod, and a rotating sleeve threaded around the outer edge of the threaded sleeve. The clamping rods are evenly distributed around the outer edge of the threaded sleeve, and the top of the threaded sleeve is rotatably connected to the convex ring.

[0009] The lower end of the screw sleeve of the second clamping assembly is fixed with a screw tube, and a bracket is rotatably mounted on the outside of the screw tube. A micro motor and a bevel gear are mounted on the bracket. A bevel gear ring is meshed with the bevel gear and is coaxially fixed on the outside of the screw tube. A screw cylinder is screwed to the lower thread of the screw tube. A straight rail is fixed to the outside of the screw cylinder by a support plate. The screw sleeve of the first clamping assembly is slidably connected to the straight rail by a first slider, and the bracket is slidably connected to the straight rail by a second slider.

[0010] In a further embodiment, a protective cover is connected to the bracket, and an O-ring is provided between the protective cover and the rotating sleeve of the second clamping assembly.

[0011] In a further embodiment, the straight rail is axially parallel to the hollow copper tube, and the first slider is locked to the straight rail by bolts.

[0012] In a further embodiment, a positioning strip is fixed around the outer periphery of the screw sleeve, and the positioning strip is parallel to the axial direction of the screw sleeve. A positioning bolt is transversely inserted through one end of the positioning strip extending outside the rotating sleeve. The positioning bolt is threadedly connected to the positioning strip, and the axial direction of the positioning bolt is parallel to the radial direction of the rotating sleeve.

[0013] In a further embodiment, a corrugated telescopic sleeve is installed between the outer wall of the screw barrel and the bottom surface of the bracket, and the corrugated telescopic sleeve covers the screw barrel.

[0014] In a further embodiment, an O-ring is provided between the convex ring and the threaded sleeve.

[0015] In a further embodiment, an O-ring is provided between the bottom plate of the screw barrel and the hollow copper tube.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention uses axially distributed first and second clamping components to clamp hollow copper tubes in sections. The upper section is supported by ball bearings for rotation, while the lower section is fixed by an anti-slip pad, effectively suppressing radial runout during processing and improving the accuracy of deep hole machining. At the same time, a micro motor drives a bevel gear pair to rotate the spiral tube inside the screw barrel, which is converted into linear displacement of the bracket and clamping components. With the help of a straight rail guide, it ensures that the feed trajectory is parallel to the axis of the copper tube. The clamping components adopt a threaded linkage design, and rotating the rotating sleeve can simultaneously control the retraction or opening of multiple clamping rods, achieving rapid clamping and concentric positioning, making it convenient to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the second clamping assembly and screw barrel installation structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the first clamping component and the straight rail installation of the present invention (half-sectional view).

[0021] Figure 4 This is a half-sectional view of the second clamping component and the screw barrel installation of this utility model.

[0022] In the diagram: 1. Hollow copper tube; 2. First clamping assembly; 3. Second clamping assembly; 4. Bracket; 41. Protective cover; 42. O-ring one; 5. Straight rail; 6. First slider; 7. Second slider; 8. Screw sleeve; 9. Clamping rod; 10. Convex ring; 11. Support rod; 12. Rotating sleeve; 13. Positioning strip; 14. Positioning bolt; 15. Screw tube; 16. Micro motor; 17. Bevel gear; 18. Bevel gear ring; 19. Screw barrel; 20. Support plate; 21. Corrugated telescopic sleeve; 22. Ball bearing; 23. Anti-slip pad; 24. O-ring two; 25. O-ring three. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4A clamping and positioning mechanism for an electrical discharge drilling machine includes a first clamping assembly 2 and a second clamping assembly 3 distributed axially along a hollow copper tube 1. The first clamping assembly 2 and the second clamping assembly 3 have identical structures, including a threaded sleeve 8 fitted over the hollow copper tube 1, a clamping rod 9 hinged to the outer edge of the threaded sleeve 8, a convex ring 10 fitted around the periphery of the threaded sleeve 8, a support rod 11 hinged between the convex ring 10 and the clamping rod 9, and a rotating sleeve 12 threadedly connected to the periphery of the threaded sleeve 8. The clamping rods 9 are evenly distributed circumferentially around the periphery of the threaded sleeve 8. The top end of the threaded sleeve 8 is rotatably connected to the convex ring 10. An O-ring 24 is provided between the gap between the 10 and the threaded sleeve 8. When the rotating sleeve 12 is rotated, the convex ring 10 is driven to move radially along the threaded sleeve 8. The clamping rod 9 is driven to close or open through the support rod 11. Several balls 22 are rotatably embedded on the side of the clamping rod 9 of the first clamping assembly 2 that is in contact with the hollow copper tube 1, so that the hollow copper tube 1 can rotate around the axis relative to the first clamping assembly 2. The clamping rod 9 of the second clamping assembly 3 is connected to the side of the hollow copper tube 1 that is in contact with the hollow copper tube 1 with an anti-slip pad 23, so that the hollow copper tube 1 and the second clamping assembly 3 are in a relatively locked and fixed state.

[0027] A positioning strip 13 is also fixed around the outer periphery of the screw sleeve 8, and the positioning strip 13 is parallel to the axial direction of the screw sleeve 8. A positioning bolt 14 is transversely inserted through one end of the positioning strip 13 extending to the outside of the rotating sleeve 12. The positioning bolt 14 is threadedly connected to the positioning strip 13, and the axial direction of the positioning bolt 14 is parallel to the radial direction of the rotating sleeve 12. When the positioning bolt 14 is screwed into the rotating sleeve 12, it can abut against the outer wall of the rotating sleeve 12, thereby locking the rotating sleeve 12 and preventing the rotating sleeve 12 from rotating and causing the clamping rod 9 to loosen.

[0028] The lower end of the threaded sleeve 8 of the second clamping assembly 3 is fixed with a threaded tube 15, and a bracket 4 is rotatably mounted on the outside of the threaded tube 15. A micro motor 16 is mounted on the bracket 4. The output shaft of the micro motor 16 is connected to a bevel gear 17. A bevel gear ring 18 is meshed around the bevel gear 17 and is coaxially fixed around the threaded tube 15. A screw cylinder 19 is threaded onto the lower thread of the threaded tube 15. A straight rail 5 is fixed to the outside of the screw cylinder 19 by a support plate 20. The straight rail 5 is axially parallel to the hollow copper tube 1. The threaded sleeve 8 of the first clamping assembly 2 is slidably connected to the straight rail 5 by a first slider 6. The first slider 6 and the straight rail 5 are locked together by bolts to prevent the first clamping assembly 2 from moving relative to the straight rail 5. The initial clamping height of the first clamping assembly 2 can be adjusted by fixing the bolts to the screw holes at different positions on the straight rail 5. The bracket 4 is slidably connected to the straight rail 5 by a second slider 7. When the threaded tube 15 rotates, the second slider 7 slides along the direction of the straight rail 5.

[0029] To improve the sealing and protection effect, a protective cover 41 is connected to the bracket 4. The protective cover 41 covers the micro motor 16, bevel gear 17 and bevel gear ring 18 and other transmission components. An O-ring 42 is provided between the protective cover 41 and the rotating sleeve 12 of the second clamping assembly 3 to prevent chips. A corrugated telescopic sleeve 21 is installed between the outer wall of the screw barrel 19 and the bottom surface of the bracket 4. The corrugated telescopic sleeve 21 covers the screw tube 15. An O-ring 25 is provided between the bottom plate of the screw barrel 19 and the hollow copper tube 1 to prevent chips from entering the screw tube 15 and the inside of the screw barrel 19.

[0030] Workflow: The support plate 20 and the straight rail 5 are fixedly installed with the electrode mounting base of the EDM drilling machine. The hollow copper tube 1 passes through the two clamping components and then emerges from the bottom of the screw barrel 19. Then, the rotating sleeve 12 of the two clamping components is rotated, which drives the support rod 11 to push the clamping rod 9 to close. The hollow copper tube 1 is clamped by the ball bearing 22 and the anti-slip pad 23 respectively. During operation, the hollow copper tube 1 rotates and high-pressure coolant is introduced. The micro motor 16 drives the bevel gear 17 to drive the bevel gear ring 18 to rotate, so that the screw tube 15 rotates in the screw barrel 19. The rotation of the screw tube 15 pushes the bracket 4 to move down along the straight rail 5. The screw tube 15 drives the hollow copper tube 1 to feed synchronously through the second clamping component 3. The hollow copper tube 1 rotates in the first clamping component 2. The forward and reverse rotation of the micro motor 16 can control the feed / retraction.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A clamping and positioning mechanism for an electrical discharge drilling machine, characterized in that, It includes a first clamping assembly (2) and a second clamping assembly (3) distributed along the axial direction of the hollow copper tube (1). The first clamping assembly (2) is rotatably inlaid with a plurality of balls (22) on the side of the hollow copper tube (1) that is in contact with it. The second clamping assembly (3) is connected to the side of the hollow copper tube (1) that is in contact with it with it with an anti-slip pad (23). The first clamping assembly (2) and the second clamping assembly (3) have the same structure, including a screw sleeve (8), a clamping rod (9) hinged to the outer edge of the screw sleeve (8), a convex ring (10) sleeved around the outside of the screw sleeve (8), a support rod (11) hinged between the convex ring (10) and the clamping rod (9), and a rotating sleeve (12) threaded around the outside of the screw sleeve (8). The clamping rod (9) is evenly distributed around the outside of the screw sleeve (8), and the top of the screw sleeve (8) is rotatably connected to the convex ring (10). The lower end of the threaded sleeve (8) of the second clamping assembly (3) is fixed with a threaded tube (15), and a bracket (4) is rotatably mounted on the outside of the threaded tube (15). A micro motor (16) and a bevel gear (17) are mounted on the bracket (4). A bevel gear ring (18) is meshed around the bevel gear (17), and the bevel gear ring (18) is coaxially fixed around the threaded tube (15). A screw cylinder (19) is threaded onto the lower thread of the threaded tube (15). A straight rail (5) is fixed to the outside of the screw cylinder (19) through a support plate (20). The threaded sleeve (8) of the first clamping assembly (2) is slidably connected to the straight rail (5) through a first slider (6), and the bracket (4) is slidably connected to the straight rail (5) through a second slider (7).

2. The clamping and positioning mechanism for an electrical discharge drilling machine according to claim 1, characterized in that: The bracket (4) is connected to a protective cover (41), and an O-ring (42) is provided between the protective cover (41) and the rotating sleeve (12) of the second clamping assembly (3).

3. The clamping and positioning mechanism for an electrical discharge drilling machine according to claim 1, characterized in that: The straight rail (5) is parallel to the hollow copper tube (1) along its axis, and the first slider (6) is locked to the straight rail (5) by bolts.

4. The clamping and positioning mechanism for an electrical discharge drilling machine according to claim 1, characterized in that: The outer periphery of the screw sleeve (8) is also fixed with a positioning strip (13), and the positioning strip (13) is parallel to the axial direction of the screw sleeve (8). The end of the positioning strip (13) extending to the outside of the rotating sleeve (12) is transversely connected with a positioning bolt (14). The positioning bolt (14) is threadedly connected to the positioning strip (13), and the axial direction of the positioning bolt (14) is parallel to the radial direction of the rotating sleeve (12).

5. The clamping and positioning mechanism for an electrical discharge drilling machine according to claim 1, characterized in that: A corrugated telescopic sleeve (21) is installed between the outer wall of the screw barrel (19) and the bottom surface of the bracket (4), and the corrugated telescopic sleeve (21) covers the screw tube (15).

6. The clamping and positioning mechanism for an electrical discharge drilling machine according to claim 1, characterized in that: An O-ring 24 is provided between the convex ring (10) and the threaded sleeve (8).

7. The clamping and positioning mechanism for an electrical discharge drilling machine according to claim 1, characterized in that: An O-ring (25) is provided between the bottom plate of the screw cylinder (19) and the hollow copper tube (1).

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