Pneumatic clamp for machining circular workpiece

Abstract

The utility model relates to a circular workpiece machining pneumatic clamp which comprises a jig bottom plate, nine buffering clamping structures are arranged at the upper end of the jig bottom plate, nine lifting air cylinders are arranged at the lower end of the jig bottom plate in a matched mode, each buffering clamping structure comprises two fixing seats which are in bilateral symmetry, limiting rails are arranged between the fixing seats in a front-back symmetry mode, and the limiting rails are arranged on the fixing seats in a matched mode. A cross-shaped block is arranged above the fixing seat, a pair of elastic pieces is arranged at the lower end of the cross-shaped block in a bilateral symmetry mode, and buffer sleeves are arranged at the lower ends of the elastic pieces; the elastic piece is arranged, so that the buffering effect is achieved between the cross block and the pressing block, the impact force between the pressing block and the fixing base is reduced, and the possibility that a workpiece has clamping traces is reduced; by arranging the hollow buffer pad, the buffer of a compressed hollow structure is combined with the buffer of a material, so that the compression ratio is increased, and the buffer effect is improved; and an L-shaped plate and a second triangular tooth are arranged, so that the friction force generated when the circular workpiece moves front and back is increased, and the circular workpiece is prevented from running during clamping.

Description

Technical Field

[0001] The utility model relates to the technical field of circular workpiece clamps, in particular to a pneumatic clamp for processing circular workpieces. Background Art

[0002] In the processing of pneumatic components, the left and right clamps are usually controlled by cylinders to move closer or farther to clamp the circular workpiece, or a robotic arm is used for clamping processing. In this process, clamping marks will be formed on the surface of the circular workpiece, which is not conducive to subsequent surface treatment. In addition, the circular workpiece may move and cause clamping deviation. Therefore, we designed a pneumatic clamp for circular workpiece processing.

[0003] Patent No. CN202220057886.3 is a Chinese utility model patent, which discloses a circular workpiece fixture, including two bases, each of which is provided with a clamping head, each of which is provided with a correction component located between the two clamping heads, the correction component including a reset spring and a spring nail cover located at the end of the reset spring, the other end of the reset spring is connected to the corresponding base, and the axial direction of the reset spring is the same as the feeding direction of the fixture; when a circular workpiece fixture of the utility model conveys a circular workpiece to a machine tool fixture and releases it, the circular workpiece can be pressed against the machine tool fixture under the elastic force of the reset spring, and the circular workpiece is clamped by the machine tool fixture, which has a good correction function and can prevent the circular workpiece from running off, but the utility model has the following problems: first, it does not have a buffer clamping design, and clamping marks will appear on the surface of the workpiece, which is not conducive to later surface treatment; secondly, the clamping and positioning ability of the rod-type circular workpiece is poor, and the upper end of the workpiece is easy to run during processing. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems that the existing circular addition and subtraction processing fixture has a large clamping impact force, is easy to cause clamping marks on the surface of the circular workpiece, is not conducive to later surface treatment, and the circular workpiece is easy to move when clamped by arranging elastic parts, hollow buffer pads, L-shaped plates and No. 2 triangular teeth.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pneumatic clamp for processing circular workpieces, including a jig base plate, wherein the upper end of the jig base plate is provided with 9 buffer clamping structures, and the lower end of the jig base plate is adapted to be provided with 9 lifting cylinders, the buffer clamping structure includes two left-right symmetrical fixed seats, limiting rails are symmetrically provided between the fixed seats, and a cross block is provided above the fixed seat, a pair of elastic members are symmetrically provided at the lower end of the cross block, and a buffer sleeve is provided at the lower end of the elastic member.

[0007] As a preferred embodiment, a pressing block is provided at the lower end of the buffer sleeve, a circular arc surface is provided at the middle part of the lower end of the pressing block, and a hollow buffer pad is provided on the outer surface of the circular arc surface.

[0008] Preferably, a rectangular cavity is provided inside the hollow buffer pad, and a No. 1 triangular tooth is evenly distributed from left to right at the lower end of the hollow buffer pad, and a triangular cavity is provided inside the No. 1 triangular tooth.

[0009] Preferably, a V-shaped groove is provided in the middle of the upper end of the fixing seat, and an L-shaped plate is provided at the rear end of the V-shaped groove, the L-shaped plate is located at the rear end of the V-shaped groove, and a No. 2 hollow buffer pad is provided on the upper surface of the V-shaped groove.

[0010] As a preference, the interior of the No. 2 hollow buffer pad is provided with a No. 2 rectangular inner cavity, and the upper end of the No. 2 hollow buffer pad is evenly distributed with No. 2 triangular teeth from front to back, and the interior of the No. 2 triangular teeth is provided with a No. 2 triangular cavity.

[0011] As a preferred embodiment, a No. 1 circular hole is symmetrically provided on the upper and lower surfaces of the cross block, the inner surface of the No. 1 circular hole is sleeved with a limiting track, and a No. 2 circular hole is provided between the No. 1 circular holes, a connecting block is provided in the No. 2 circular hole, and the lower end of the connecting block is connected to the piston rod of the lifting cylinder.

[0012] Beneficial effects of the utility model:

[0013] (1) In the utility model, an elastic member is provided to provide a buffering effect between the cross block and the pressure block, thereby reducing the impact force between the pressure block and the fixed seat. When the lower end of the pressure block contacts the circular workpiece, the cross block continues to press downward under the action of the lifting cylinder, causing the elastic member to deform and shrink until the elastic member is compressed in the buffer sleeve, so that the cross block applies downward pressure to the pressure block, thereby achieving clamping of the circular workpiece.

[0014] (2) In the utility model, a hollow cushion is provided to combine the cushioning of the compressed hollow structure with the cushioning of the material itself, thereby increasing the compression ratio and improving the cushioning effect. On the other hand, the internal hollow design also saves the manufacturing materials and manufacturing costs of the hollow cushion, which is in line with economic benefits and has broad application prospects.

[0015] (3) In the utility model, an L-shaped plate and a second triangular tooth are provided. The L-shaped plate limits the position of the rear end of the circular workpiece, and the second triangular tooth increases the roughness of the contact surface between the circular workpiece and the fixed seat, thereby increasing the friction force of the circular workpiece moving forward and backward, thereby preventing the circular workpiece from running when clamped.

[0016] In summary, the utility model has the advantages of simple structure, high clamping stability and no clamping marks, and is particularly suitable for the technical field of circular workpiece clamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 Schematic diagram of the structure of the pneumatic clamp for processing circular workpieces.

[0019] Figure 2 It is a schematic diagram of the structure of the buffer clamping structure.

[0020] Figure 3 It is a schematic diagram of the cross-section structure of the hollow buffer pad part.

[0021] Figure 4 This is a schematic diagram of the cross-section structure of the No. 2 hollow buffer pad. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present utility model are clearly and completely described below in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] like Figures 1 to 4As shown, the utility model provides a pneumatic clamp for processing circular workpieces, including a jig base plate 1, wherein the upper end of the jig base plate 1 is provided with 9 buffer clamping structures 2, which buffer and clamp the circular workpiece on the fixed seat 21, and the lower end of the jig base plate 1 is adapted to be provided with 9 lifting cylinders 3, which are powered to work, and their piston rods are extended and retracted, thereby driving the cross block 23 to move up and down, realizing automatic clamping and resetting, and the buffer clamping structure 2 includes two left-right symmetrical fixed seats 21, and the fixed seats 212 are fixed together with the jig base plate 1 by bolts and nuts, so that the fixed seats 21 cannot move their positions, and the fixed seats 21 are symmetrically provided with limiting rails 22 front and back between the fixed seats 21, which limit the moving trajectory of the cross block 23, ensuring that the cross block 23 always moves vertically up and down, and the fixed seats 21 are provided with There is a cross block 23, which is the installation carrier of the buffer sleeve 25, the elastic member 24 and the pressure block 26. A pair of elastic members 24 are symmetrically arranged at the lower end of the cross block 23, which can be an elastic component composed of a spring and an elastic rod, connecting the cross block 23 and the pressure block 26 together. A buffer sleeve 25 is arranged at the lower end of the elastic member 24. The buffer sleeve 25 is a hollow cylinder. The elastic member 24 can be completely hidden in the buffer sleeve 25 after compression. The buffer sleeve 25 is made of rubber to buffer the impact force from the cross block 23. When the lower end of the pressure block 26 contacts the circular workpiece, the cross block 23 continues to press down under the action of the lifting cylinder 3, so that the elastic member 24 deforms and contracts until the elastic member 24 is compressed in the buffer sleeve 25, so that the cross block 23 applies downward pressure on the pressure block 26, thereby achieving clamping of the circular workpiece.

[0025] Further, if Figure 2 As shown, a pressure block 26 is provided at the lower end of the buffer sleeve 25, and a circular arc surface 261 is provided in the middle of the lower end of the pressure block 26. The outer surface of the circular arc surface 261 is provided with a hollow buffer pad 262 for buffering the pressure between the pressure block 26 and the fixing seat 21, and also for buffering the pressure between the pressure block 26 and the circular workpiece.

[0026] Further, if Figure 3 As shown, the interior of the hollow buffer pad 262 is provided with a rectangular cavity 263, and reinforcement strips are evenly distributed in the cavity to play a reinforcing role and prevent the rectangular cavity 263 from excessive deformation. The lower end of the hollow buffer pad 262 is evenly distributed with No. 1 triangular teeth 264 from left to right to increase the roughness of the contact area with the circular workpiece and the fixed seat 21, thereby increasing the friction force. The interior of the No. 1 triangular tooth 264 is provided with a triangular cavity 265, which combines the compression hollow structure buffering with the material's own buffering, increases the compression ratio, and improves the buffering effect. On the other hand, the internal hollow design also saves the manufacturing materials and manufacturing costs of the hollow buffer pad, meets economic benefits, and has broad application prospects.

[0027] Further, if Figure 2As shown, a V-shaped groove 211 is provided in the middle of the upper end of the fixing seat 21 to limit the circular clamp, and an L-shaped plate 212 is provided at the rear end of the V-shaped groove 21, and the L-shaped plate 212 is located at the rear end of the V-shaped groove 211. A No. 2 hollow buffer pad 213 is provided on the upper surface of the V-shaped groove 211.

[0028] Further, if Figure 4 As shown, the interior of the No. 2 hollow buffer pad 213 is provided with a No. 2 rectangular inner cavity 214, and the upper end of the No. 2 hollow buffer pad 213 is evenly distributed with No. 2 triangular teeth 215 from front to back, and the interior of the No. 2 triangular teeth 215 is provided with a No. 2 triangular cavity 216. The No. 2 triangular teeth 215 increase the roughness of the contact surface between the circular workpiece and the fixed seat 21, thereby increasing the friction force of the circular workpiece moving forward and backward, and preventing the circular workpiece from running forward and backward when clamped.

[0029] Further, if Figure 2 As shown, the upper and lower surfaces of the cross block 23 are symmetrically provided with a No. 1 circular hole 231, the inner surface of the No. 1 circular hole 231 is sleeved with the limiting track 22, and a No. 2 circular hole 232 is provided between the No. 1 circular holes 231, and a connecting block 233 is provided in the No. 2 circular hole 232, and the lower end of the connecting block 233 is connected to the piston rod of the lifting cylinder 3, so that the lifting cylinder 3 can be powered on and work, and can drive the cross block 23 to move.

[0030] Working process: first, place the circular workpiece on the V-groove 211, and the rear end of the circular workpiece abuts the L-shaped plate 212, the lifting cylinder 3 is powered on, and its piston rod drives the cross block 23 to move vertically downward; further, the cross block 23 gradually moves downward until the lower end of the pressure block 26 contacts the circular workpiece, which causes the elastic member 24 to deform and contract until the elastic member 24 is compressed in the buffer sleeve 25, so that the cross block 23 applies downward pressure to the pressure block 26; further, the pressure block 26 is gradually compressed to press the circular workpiece, so that the circular workpiece is gradually clamped and fixed by the pressure of the fixed seat 21 and the pressure block 26; at the same time, the second hollow buffer pad 213 and the hollow buffer pad 262 are compressed and deformed, and the buffering effect is improved by increasing the compression ratio, thereby reducing the possibility of clamping marks on the surface of the circular workpiece.

[0031] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0032] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0033] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A pneumatic clamp for processing circular workpieces, characterized in that: The jig comprises a jig base plate (1), wherein the upper end of the jig base plate (1) is provided with 9 buffer clamping structures (2), and the lower end of the jig base plate (1) is adapted to be provided with 9 lifting cylinders (3), wherein the buffer clamping structure (2) comprises two left-right symmetrical fixing seats (21), a limiting track (22) is symmetrically provided between the fixing seats (21), and a cross block (23) is provided above the fixing seats (21), a pair of elastic members (24) are symmetrically provided at the lower end of the cross block (23), and a buffer sleeve (25) is provided at the lower end of the elastic member (24).

2. A pneumatic fixture for processing circular workpieces according to claim 1, characterized in that: A pressing block (26) is provided at the lower end of the buffer sleeve (25), a circular arc surface (261) is provided at the middle of the lower end of the pressing block (26), and a hollow buffer pad (262) is provided on the outer surface of the circular arc surface (261).

3. A pneumatic clamp for processing circular workpieces according to claim 2, characterized in that: A rectangular cavity (263) is provided inside the hollow buffer pad (262), and a number-one triangular tooth (264) is evenly distributed from left to right at the lower end of the hollow buffer pad (262), and a triangular cavity (265) is provided inside the number-one triangular tooth (264).

4. A pneumatic clamp for processing circular workpieces according to claim 1, characterized in that: A V-shaped groove (211) is provided in the middle of the upper end of the fixing seat (21), and an L-shaped plate (212) is provided at the rear end of the V-shaped groove (211). The L-shaped plate (212) is located at the rear end of the V-shaped groove (211), and a second hollow buffer pad (213) is provided on the upper surface of the V-shaped groove (211).

5. A pneumatic clamp for processing circular workpieces according to claim 4, characterized in that: A second rectangular inner cavity (214) is provided inside the second hollow buffer pad (213), and second triangular teeth (215) are evenly distributed from front to back on the upper end of the second hollow buffer pad (213), and a second triangular cavity (216) is provided inside the second triangular teeth (215).

6. A pneumatic fixture for processing circular workpieces according to claim 1, characterized in that: The upper and lower surfaces of the cross block (23) are symmetrically provided with a No. 1 circular hole (231), the inner surface of the No. 1 circular hole (231) is sleeved with the limiting track (22), and a No. 2 circular hole (232) is provided between the No. 1 circular holes (231), and a connecting block (233) is provided in the No. 2 circular hole (232), and the lower end of the connecting block (233) is connected to the piston rod of the lifting cylinder (3).

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