Numerical control lathe positioning clamp

Abstract

The utility model discloses a numerical control lathe positioning fixture, which relates to the numerical control lathe fixture field, and comprises a chuck fixture body, the upper end of the chuck fixture body is provided with at least two sliding seats, the top of each sliding seat is connected with a clamping jaw, each clamping jaw is of a step-shaped structure, the middle part of the bottom end of each clamping jaw is provided with a first insertion hole, and each first insertion hole is provided with a second insertion hole. Second inserting holes are formed in the two ends of the bottom of the clamping jaw, and a connecting column matched with the first inserting holes is arranged in the middle of the top end of the sliding base. According to the scheme, the first inserting hole is formed in the bottom end of the clamping jaw, the connecting column on the sliding base is inserted into the first inserting hole, then the clamping jaw can rotate relative to the sliding base, after the clamping jaw rotates by 180 degrees, the clamping end of the clamping jaw faces outwards, and a large-size tubular workpiece can be clamped; and secondly, according to the scheme, the detachable buffer assembly is installed at the clamping face end of the clamping jaw 3, so that the clamping of the soft workpiece is facilitated, the flexible workpiece is also conveniently and periodically replaced, and the clamping stability of the chuck clamp is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC machine tool fixtures, in particular to a CNC lathe positioning fixture. Background Art

[0002] Lathe fixtures refer to the fixtures used to process the inner and outer rotating surfaces and end faces of the workpiece on the lathe. Most lathe fixtures are installed on the spindle; a few are installed on the bed saddle or bed. Lathe fixtures are divided into centering type (spindle type), collet type, chuck type, angle iron type and faceplate type according to the different workpiece positioning methods. At present, the most widely used fixture in machine tools is the chuck, which is a mechanical device used to clamp the workpiece on the machine tool. The machine tool accessories that clamp and position the workpiece by radial movement of the movable jaws evenly distributed on the chuck body. The chuck generally consists of three parts: the chuck body, the movable jaws and the jaw drive mechanism. From the number of chuck jaws, it can be divided into: two-jaw chuck, three-jaw chuck, four-jaw chuck, six-jaw chuck and special chuck. From the use of power, it can be divided into: manual chuck, pneumatic chuck, hydraulic chuck, electric chuck and mechanical chuck. From the structure, it can be divided into: hollow chuck and solid chuck.

[0003] However, the existing chuck fixtures have relatively simple functions. When facing a larger workpiece, they may exceed the clamping range, which limits their use. Secondly, the clamping surface ends of the active jaws of the existing chucks are all set as anti-slip corrugated surfaces. However, after long-term use, the clamping surface of the active jaws will be worn, which will cause unstable clamping. In addition, the existing chuck fixtures do not have a buffer clamping function. When encountering a soft workpiece, it may cause clamping marks on the workpiece, or even cause the workpiece to deform, thereby damaging the quality of the processed product. Utility Model Content

[0004] The purpose of the utility model is to provide a positioning fixture for a CNC lathe in order to solve the problems mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a CNC lathe positioning fixture comprises a chuck fixture body, at least two slide seats are installed on the upper end of the chuck fixture body, a clamping jaw is connected to the top of the slide seat, the clamping jaw is a stepped structure, a first plug hole is opened in the middle of the bottom end of the clamping jaw, and second plug holes are opened at both ends of the bottom of the clamping jaw, a connecting column matched with the first plug hole is provided in the middle of the top end of the slide seat, the connecting column is inserted into the first plug hole, and limit columns matched with the second plug holes are provided at both ends of the top of the slide seat; a sliding groove is opened at one clamping end of the clamping jaw, and a buffer assembly is slidably connected in the sliding groove, wherein the buffer assembly includes a substrate that fits the clamping end face of the clamping jaw, the inner side end of the substrate is provided with a slide rail matched with the sliding groove, and the outer side end of the substrate is provided with a rubber pad.

[0006] As a further solution of the utility model: a through hole connected to the first plug hole is opened in the middle of the top end of the clamping jaw, the through hole and the first plug hole are concentrically arranged, and a bolt is inserted into the through hole.

[0007] As a further solution of the present invention: the depth of the first insertion hole is greater than or equal to the length of the connecting column, and the inner wall of the connecting column is provided with a thread matching the bolt.

[0008] As a further solution of the present invention: the slide seat and the clamping claw are arranged with equal length.

[0009] As a further solution of the utility model: the rubber pad is connected to the base sheet by strong glue, and the outer side wall of the rubber pad is provided with anti-slip corrugations.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] This solution opens a first socket at the bottom end of the clamp, and the connecting column on the slide is inserted into the first socket, so that the clamp can rotate relative to the slide. After rotating 180 degrees, the clamping end of the clamp faces outward, so that larger tubular workpieces can be clamped. Secondly, this solution installs a detachable buffer component on the clamping surface end of the clamp, which is not only conducive to clamping soft workpieces, but also convenient for periodic replacement, thereby ensuring the stability of the chuck clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the connection structure of the clamping jaw, the sliding seat and the buffer assembly of the utility model;

[0014] Figure 3 This is a schematic diagram of the connection structure between the clamping jaw and the buffer assembly of the utility model;

[0015] Figure 4 For the utility model Figure 3 Another structural schematic diagram of the present invention;

[0016] Figure 5 This is a schematic diagram of the slide structure of the utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the buffer component of the utility model.

[0018] In the figure: 1. chuck fixture body; 2. slide seat; 3. clamping claw; 4. buffer assembly; 401. substrate; 402. slide rail; 403. rubber pad; 5. first plug hole; 6. second plug hole; 7. connecting column; 8. limiting column; 9. through hole; 10. bolt; 11. slide groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figures 1 to 6 In the embodiment of the utility model, a positioning fixture for a numerically controlled lathe comprises a chuck fixture body 1, at least two slide seats 2 are installed on the upper end of the chuck fixture body 1, a clamping jaw 3 is connected to the top of the slide seat 2, the clamping jaw 3 is a stepped structure, a first plug hole 5 is opened in the middle of the bottom end of the clamping jaw 3, and second plug holes 6 are opened at both ends of the bottom of the clamping jaw 3, a connecting column 7 matched with the first plug hole 5 is provided in the middle of the top end of the slide seat 2, the connecting column 7 is plugged into the first plug hole 5, and the two ends of the top of the slide seat 2 A limiting column 8 matching the second socket 6 is provided; a sliding groove 11 is provided at a clamping end of the clamping jaw 3, and a buffer component 4 is slidably connected in the sliding groove, wherein the buffer component 4 includes a substrate 401 that fits the clamping end face of the clamping jaw 3, a sliding rail 402 matching the sliding groove is provided at the inner end of the substrate 401, and a rubber pad 403 is provided at the outer end of the substrate 401; the rubber pad 403 is connected to the substrate 401 by strong glue, and the outer wall of the rubber pad 403 is provided with anti-slip corrugations.

[0021] In this embodiment: Since the existing chuck fixture has a relatively simple function, it may exceed the clamping range when facing a larger workpiece, thereby causing limitations in use; secondly, the clamping surface ends of the active jaws of the existing chuck are all set as anti-slip corrugated surfaces. However, after long-term use, the clamping surface of the active jaws will be worn, thereby causing the occurrence of unstable clamping. In addition, the existing chuck fixture does not have a buffer clamping function. When encountering a soft workpiece clamping, it may cause a clamping mark on the workpiece, or even cause the workpiece to deform, thereby damaging the quality of the processed product. Therefore, this solution opens a first plug hole 5 at the bottom end of the clamping jaw 3, and the connecting column 7 on the slide 2 is plugged into the first plug hole 5, so that the clamping jaw 3 can rotate relative to the slide 2. After rotating 180 degrees, the clamping end of the clamping jaw 3 faces outward, and a larger tubular workpiece can be clamped; secondly, this solution installs a detachable buffer component 4 on the clamping surface end of the clamping jaw 3, which is not only conducive to clamping soft workpieces, but also convenient for periodic replacement, to ensure the stability of the clamping of the chuck fixture.

[0022] Specifically, it should be noted that the chuck fixture body 1, slide 2 and jaw 3 in the present scheme are all existing chuck fixture structures; when a larger workpiece needs to be clamped, the jaw 3 can be rotated with the clamping surface end of the jaw 3 facing outward. At this time, a larger tubular workpiece can be clamped. In addition, the jaw 3 is a trapezoidal structure, and the outer walls of the jaw 3 parallel to the clamping surface end can be used to clamp the workpiece, thereby expanding the diversity of clamping the processed workpiece and improving the overall applicability of the chuck fixture.

[0023] The buffer assembly 4 is composed of a substrate 401, a slide rail 402 and a rubber pad 403. The substrate 401 is a hard metal or plastic part. The slide rail 402 is integrally formed with the substrate 401. The slide rail 402 can be slidably inserted into the slide groove 11 on the clamping jaw 3, which is convenient for periodic replacement of the buffer assembly 4 in the later stage. The rubber pad 403 on the outside of the substrate 401 can provide a certain buffering effect on the clamped workpiece, and can also avoid the generation of clamping marks on the clamping part of the workpiece, further ensuring the appearance quality of the workpiece product. The outer surface of the rubber pad 403 is provided with anti-slip corrugations to ensure the stability of the workpiece clamping. After a period of wear, it can be replaced without replacing the entire clamping jaw 3, saving costs and ensuring the stability of clamping.

[0024] Please refer to Figure 2 A through hole 9 connected to the first socket 5 is provided in the middle of the top end of the clamp 3. The through hole 9 and the first socket 5 are concentrically arranged, and a bolt 10 is inserted into the through hole 9. The depth of the first socket 5 is greater than or equal to the length of the connecting column 7, and the inner wall of the connecting column 7 is provided with a thread matching the bolt 10.

[0025] In this embodiment: the clamping jaw 3 is fixed to the slide 2 by bolts 10, and the connecting column 7 is inserted into the second insertion hole 6 to limit the rotational deviation of the clamping jaw 3 relative to the slide 2. The above structure has a strong connection and is convenient for disassembly and assembly and adjustment of the direction of the clamping end of the clamping jaw 3.

[0026] Please refer to Figure 3 The slide seat 2 and the clamping jaw 3 are set to be of equal length.

[0027] In this embodiment: the slide 2 and the clamping jaw 3 are set to be of equal length. When the buffer component 4 is inserted into the clamping jaw 3, the slide 2 can be used to block the opening of the slide groove 11, and then the slide rail 402 can be restricted in the slide groove 11, thereby ensuring the stability of the connection between the clamping jaw 3 and the buffer component 4, and also facilitating the disassembly, assembly and replacement of the buffer component 4.

[0028] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A positioning fixture for a numerically controlled lathe, comprising a chuck fixture body (1), at least two slide seats (2) being mounted on the upper end of the chuck fixture body (1), and a clamping claw (3) being connected to the top of the slide seat (2), characterized in that: The clamping jaw (3) is a stepped structure, a first plug hole (5) is provided in the middle of the bottom end of the clamping jaw (3), and second plug holes (6) are provided at both ends of the bottom end of the clamping jaw (3), a connecting column (7) matched with the first plug hole (5) is provided in the middle of the top end of the sliding seat (2), the connecting column (7) is plugged into the first plug hole (5), and limiting columns (8) matched with the second plug hole (6) are provided at both ends of the top end of the sliding seat (2); A sliding groove (11) is provided at one clamping end of the clamping jaw (3), and a buffer component (4) is slidably connected in the sliding groove, wherein the buffer component (4) includes a substrate (401) that fits the clamping end surface of the clamping jaw (3), the inner end of the substrate (401) is provided with a sliding rail (402) that matches the sliding groove, and the outer end of the substrate (401) is provided with a rubber pad (403).

2. A CNC lathe positioning fixture according to claim 1, characterized in that: A through hole (9) connected to the first insertion hole (5) is provided at the middle of the top end of the clamping jaw (3); the through hole (9) and the first insertion hole (5) are arranged concentrically; a bolt (10) is inserted into the through hole (9).

3. A CNC lathe positioning fixture according to claim 2, characterized in that: The depth of the first insertion hole (5) is greater than or equal to the length of the connecting column (7), and the inner wall of the connecting column (7) is provided with a thread matching the bolt (10).

4. A CNC lathe positioning fixture according to claim 3, characterized in that: The sliding seat (2) and the clamping claw (3) are arranged with the same length.

5. A CNC lathe positioning fixture according to claim 4, characterized in that: The rubber pad (403) is connected to the base sheet (401) by adhesive bonding via strong glue, and an outer side wall of the rubber pad (403) is provided with anti-slip corrugations.

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