Clamp device for machining special-shaped workpiece

Abstract

The utility model discloses a clamp device for processing special-shaped workpieces, and relates to the technical field of machinery, the clamp device comprises a pedestal and a first cylinder, the first cylinder is fixedly installed on the inner side of the pedestal, the top of the first cylinder is provided with a clamping assembly and a protection piece, the clamping assembly comprises a positioning piece, and the positioning piece comprises a first guide rail; first sliding blocks are arranged at the bottom of the first guide rail and symmetrically distributed on the two sides of the first guide rail, traction arms are hinged to the tops of the first sliding blocks, the traction arms are hinged to each other, and the first sliding blocks are movably connected to the two sides of the first guide rail through the traction arms. According to the clamp device for machining the special-shaped workpieces, the angle difference between the traction arms is changed through the change of the length of the output shaft of the second air cylinder, the first sliding block connected with the traction arms moves along the bottom of the first guide rail, and the clamp device meets the clamping requirements of the special-shaped workpieces of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to a clamp device for processing special-shaped workpieces. Background Art

[0002] Workholding devices play an important role in manufacturing and machining processes. They are used to hold, support and position workpieces, ensuring they remain in a stable and accurate position during machining.

[0003] And according to the specific application, the clamp device can be designed into various forms and sizes to adapt to different types of workpieces and processing requirements. The existing Chinese patent with the authorization announcement number CN214135050U discloses a positioning clamping device for processing special-shaped workpieces. Through the design of the positioning reference block and the spring, the positioning reference block on the lower clamping jaw of the clamp is pushed by the spring to lift the special-shaped workpiece for processing, thereby ensuring the consistency of workpiece processing and improving the yield rate.

[0004] The base is the main component that supports and fixes the entire fixture system, and a component for clamping the workpiece is usually set on the top of the base, which can be a clamping element of a clamp such as a clamping claw, a clamping block or other forms of a fixture, and the workpiece is clamped by a manual, pneumatic, or hydraulic drive system. However, the prior art generally uses a movable cylinder to squeeze the fixed-shaped base to fix the workpiece. Since the shape of the heterogeneous workpiece is relatively irregular, it is easy to loosen during processing, affecting the normal processing of the workpiece. Utility Model Content

[0005] In view of the above-mentioned prior art generally using a movable cylinder to squeeze a fixed-shaped base to fix the workpiece, and the irregular shape of the heterogeneous workpiece is prone to loosening during processing, which affects the normal processing of the workpiece, the present utility model is proposed.

[0006] Therefore, the utility model aims to provide a clamping device for processing special-shaped workpieces, and its purpose is to adapt to the clamping requirements of special-shaped workpieces of different sizes by changing the distance of the first slider corresponding to the traction arm on the first guide rail.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a clamping device for processing special-shaped workpieces, comprising a pedestal and a first cylinder, wherein the first cylinder is fixedly mounted on the inner side of the pedestal, a clamping assembly and a protective member are arranged on the top of the first cylinder, and the protective member is located between the clamping assembly and the first cylinder;

[0008] The clamping assembly includes a positioning member, the positioning member includes a first guide rail, a first slider is provided at the bottom of the first guide rail, and the first slider is symmetrically distributed on both sides of the first guide rail, and the first guide rail runs through the entire first slider;

[0009] The tops of the first sliders are hinged with traction arms, the traction arms are hinged to each other, and the first sliders are movably connected to both sides of the first guide rail through the traction arms;

[0010] A second cylinder is fixedly mounted on the top of the first guide rail, and an output shaft in the second cylinder is hinged at the connection between the traction arms.

[0011] As a preferred solution of the clamp device for processing special-shaped workpieces of the utility model, wherein: the bottom of the first sliding block is movably connected with a first clamping plate, and the first clamping plate is threadedly connected to the first sliding block through a first screw rod.

[0012] As a preferred solution of the clamp device for processing special-shaped workpieces of the utility model, a grinding rubber strip is fixedly installed on the side of the first clamping plate away from the first sliding block.

[0013] As a preferred solution of the clamping device for processing special-shaped workpieces described in the utility model, the clamping assembly also includes a limit member, the limit member includes a second guide rail, and the second guide rail is arranged parallel to the first guide rail, the outer side of the second guide rail is movably connected with a second slider, and the second slider is threadedly connected to the second guide rail through a second screw.

[0014] As a preferred solution of the clamp device for processing special-shaped workpieces of the utility model, wherein: the end of the second sliding block away from the second guide rail is provided with a first rotating wheel.

[0015] As a preferred solution of the clamping device for processing special-shaped workpieces described in the utility model, the protective member includes a base, which is fixedly mounted on the bottom of the second guide rail and connected to the output end of the first cylinder, a damping rod is arranged on the inner side of the base, and one end of the damping rod protruding from the base is connected to a guide seat.

[0016] As a preferred solution of the clamping device for processing special-shaped workpieces described in the utility model, wherein: both sides of the guide seat are movably connected with a load frame, and a second rotating wheel is provided at one end of the load frame away from the guide seat, and the second rotating wheel is movably connected between the second sliders through the load frame.

[0017] Beneficial effects of the utility model:

[0018] 1. By changing the length of the output shaft of the second cylinder, the angle difference between the traction arms is changed, so that the first slider connected to the traction arms moves along the bottom of the first guide rail to meet the clamping requirements of special-shaped workpieces of different sizes.

[0019] 2. By rotating the second screw, the threaded second slider can move along the second guide rail in a direction parallel to the first guide rail, and create a buffer space around the special-shaped workpiece through the movable first rotating wheel, so as to complete the pre-positioning of the special-shaped workpiece by reducing the distance between the second sliders.

[0020] 3. The extended damping rod pushes the guide seat to provide support for the special-shaped workpiece, and when the extension length of the output shaft of the first cylinder increases, the extension length of the damping rod decreases, thereby reducing the pressure on the special-shaped workpiece and lifting the special-shaped workpiece for processing through the pushing force of the damping rod, thereby reducing damage to the special-shaped workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0022] Figure 1 The utility model is a schematic diagram of the overall structure of the fixture device for processing special-shaped workpieces.

[0023] Figure 2 The utility model is a schematic cross-sectional structure diagram of a fixture device for processing special-shaped workpieces.

[0024] Figure 3 The utility model is a schematic diagram of the positioning member structure of the fixture device for processing special-shaped workpieces.

[0025] Figure 4 The utility model is a schematic diagram of the related structures of the clamping plate and the first sliding block of the clamping device for processing special-shaped workpieces.

[0026] Figure 5 The utility model is a schematic cross-sectional structure diagram of a limiter and a protective member of a fixture device for processing special-shaped workpieces.

[0027] Description of reference numerals:

[0028] 1. Base; 2. First cylinder; 3. Clamping assembly; 31. Positioning member; 311. First guide rail; 312. First slider; 313. Towing arm; 314. Second cylinder; 315. First clamping plate; 316. First screw rod; 317. Grinding rubber strip; 32. Limiting member; 321. Second guide rail; 322. Second slider; 323. Second screw rod; 324. First rotating wheel; 4. Protective member; 41. Base; 42. Damping rod; 43. Guide seat; 44. Load frame; 45. Second rotating wheel. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] Example 1

[0031] Reference Figure 1-5 , which is the first embodiment of the utility model, provides a clamping device for processing special-shaped workpieces, the clamping device for processing special-shaped workpieces includes a pedestal 1 and a first cylinder 2, the first cylinder 2 is fixedly installed on the inner side of the pedestal 1, a clamping assembly 3 and a protective member 4 are arranged on the top of the first cylinder 2, the protective member 4 is located between the clamping assembly 3 and the first cylinder 2, the clamping assembly 3 includes a positioning member 31, the positioning member 31 includes a first guide rail 311, a first slider 312 is arranged at the bottom of the first guide rail 311, and the first slider 312 is symmetrically distributed on both sides of the first guide rail 311, the first guide rail 311 runs through the first slider 312 as a whole, the top of the first slider 312 is hinged with a traction arm 313, and the traction arms 313 are hinged to each other The first slider 312 is movably connected to both sides of the first guide rail 311 through the traction arm 313, and the second cylinder 314 is fixedly installed on the top of the first guide rail 311. The output shaft in the second cylinder 314 is hinged at the connection between the traction arms 313. The inner side of the first slider 312 is provided with a hole for easy movement on the first guide rail 311. During the movement, the movement trajectory of the first slider 312 is on the same straight line, and the center of the deflection of the traction arms 313 is the same and coincides with the connection point. The second cylinder 314 can change the angle between the traction arms 313 by controlling the change in the length of the output shaft, thereby changing the distance between the first sliders 312 to meet the clamping requirements of special-shaped workpieces of different sizes.

[0032] The bottom of the first slider 312 is movably connected with a first clamping plate 315, and the first clamping plate 315 is threadedly connected to the first slider 312 through a first screw rod 316. The inner side of the first clamping plate 315 is provided with a thread that matches the first screw rod 316. When the first screw rod 316 rotates, the first clamping plate 315 can move in the groove in the first slider 312, thereby changing the height of the first clamping plate 315 from the ground.

[0033] A wear-matching rubber strip 317 is fixedly installed on one side of the first clamping plate 315 away from the first sliding block 312. The wear-matching rubber strip 317 is made of rubber material and has an inverted V shape. The wear-matching rubber strip 317 can prevent the first clamping plate 315 from directly contacting the workpiece when the distance is reduced, and at the same time increase the friction with the workpiece to prevent the workpiece from loosening during processing.

[0034] The clamping assembly 3 also includes a limit member 32, which includes a second guide rail 321, and the second guide rail 321 is arranged parallel to the first guide rail 311. The outer side of the second guide rail 321 is movably connected with a second slider 322, and the second slider 322 is threadedly connected to the second guide rail 321 through a second screw 323. The inner side of the second slider 322 is provided with a thread that is compatible with the second screw 323, and through the rotation of the second screw 323, the second slider 322 can move along the second guide rail 321 in a direction parallel to the first guide rail 311.

[0035] The second slider 322 is provided with a first rotating wheel 324 at one end away from the second guide rail 321 . The first rotating wheel 324 is fixedly connected to the top of the second slider 322 and provides a suspended space when contacting the bottom of the workpiece to prevent the bottom of the workpiece from being damaged.

[0036] The protective member 4 includes a base 41, which is fixedly mounted on the bottom of the second guide rail 321 and connected to the output end of the first cylinder 2. A damping rod 42 is arranged on the inner side of the base 41, and one end of the damping rod 42 protruding from the base 41 is connected to a guide seat 43. The base 41 can drive the connected second guide rail 321 to approach the first guide rail 311 through the extension of the output shaft in the first cylinder 2, which is a conventional technical means known to those skilled in the art. When the device is not in use, the damping rod 42 is in an extended state and can remain stable after the workpiece is compressed and deformed. The guide seat 43 can provide support for the bottom of the workpiece.

[0037] Both sides of the guide seat 43 are movably connected with a load frame 44, and a second rotating wheel 45 is provided at one end of the load frame 44 away from the guide seat 43. The second rotating wheel 45 is movably connected between the second sliders 322 through the load frame 44. The second rotating wheel 45 has the same function as the first rotating wheel 324, that is, both are used to create a buffer space to avoid damage caused by excessive extrusion, and the height of the second rotating wheel 45 can be changed by the extension length of the damping rod 42. One end of the load frame 44 is always on the inner side of the guide seat 43, and after the distance between the second sliders 322 changes, the load frame 44 changes its length in the guide seat 43 to maintain synchronous movement with the second slider 322.

[0038] When clamping the special-shaped workpiece for processing, the workpiece is placed on the guide seat 43, and the bottom of the special-shaped workpiece that is not in contact with the guide seat 43 can be suspended by the rotatable second rotating wheel 45, and the extended damping rod 42 pushes the guide seat 43 to provide support for the special-shaped workpiece, and when the extension length of the output shaft of the first cylinder 2 increases, the extension length of the damping rod 42 decreases, while reducing the pressure on the special-shaped workpiece, the special-shaped workpiece is lifted up for processing by the pushing force of the damping rod 42, thereby reducing damage to the special-shaped workpiece, and at the same time, by rotating the second screw rod 323 corresponding to the second slider 322, the threaded second slider 322 can move along the second guide rail 321 in a direction parallel to the first guide rail 311, and a buffer space is created around the special-shaped workpiece by the movable first rotating wheel 324, so that By reducing the distance between the second sliders 322, the pre-positioning of the special-shaped workpiece is completed, and as the output shaft in the first cylinder 2 lifts the special-shaped workpiece on the guide seat 43, the first screw 316 corresponding to the first clamping plate 315 is rotated, so that the height of the first clamping plate 315 on the first slider 312 changes, so that the top of the special-shaped workpiece on the guide seat 43 does not contact the first guide rail 311, and the angle difference between the traction arms 313 is changed by the change in the length of the output shaft of the second cylinder 314, so that the first slider 312 connected to the traction arm 313 moves along the bottom of the first guide rail 311 to meet the clamping requirements of special-shaped workpieces of different sizes, and the inverted V-shaped grinding rubber strip 317 is used to avoid direct contact between the first clamping plate 315 and the workpiece when the distance is reduced, while increasing the friction with the workpiece to avoid loosening of the workpiece during processing.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fixture device for processing a special-shaped workpiece, comprising a base (1) and a first cylinder (2), wherein the first cylinder (2) is fixedly mounted on the inner side of the base (1), characterized in that: A clamping assembly (3) and a protective member (4) are provided on the top of the first cylinder (2), and the protective member (4) is located between the clamping assembly (3) and the first cylinder (2); The clamping assembly (3) comprises a positioning member (31), the positioning member (31) comprises a first guide rail (311), a first slider (312) is arranged at the bottom of the first guide rail (311), and the first slider (312) is symmetrically distributed on both sides of the first guide rail (311), and the first guide rail (311) runs through the entire first slider (312); The top of each of the first sliders (312) is hinged with a traction arm (313), the traction arms (313) are hingedly arranged with each other, and the first slider (312) is movably connected to both sides of the first guide rail (311) through the traction arms (313); A second cylinder (314) is fixedly mounted on the top of the first guide rail (311), and an output shaft in the second cylinder (314) is hinged at the connection between the traction arms (313).

2. A fixture device for processing special-shaped workpieces according to claim 1, characterized in that: The bottom of each of the first sliding blocks (312) is movably connected to a first clamping plate (315), and the first clamping plate (315) is threadedly connected to the first sliding block (312) via a first screw rod (316).

3. A fixture device for processing special-shaped workpieces according to claim 2, characterized in that: A grinding rubber strip (317) is fixedly mounted on one side of the first clamping plate (315) facing away from the first sliding block (312).

4. A fixture device for processing special-shaped workpieces according to claim 1, characterized in that: The clamping assembly (3) further comprises a limiting member (32), wherein the limiting member (32) comprises a second guide rail (321), and the second guide rail (321) is arranged in parallel with the first guide rail (311), and a second slider (322) is movably connected to the outer side of the second guide rail (321), and the second slider (322) is threadedly connected to the second guide rail (321) via a second screw rod (323).

5. A fixture device for processing special-shaped workpieces according to claim 4, characterized in that: The second sliding block (322) is provided with a first rotating wheel (324) at one end away from the second guide rail (321).

6. A fixture device for processing special-shaped workpieces according to claim 1, characterized in that: The protective member (4) comprises a base (41), the base (41) being fixedly mounted on the bottom of the second guide rail (321) and connected to the output end of the first cylinder (2), a damping rod (42) being arranged on the inner side of the base (41), and one end of the damping rod (42) protruding from the base (41) being connected to a guide seat (43).

7. A fixture device for processing special-shaped workpieces according to claim 6, characterized in that: Both sides of the guide seat (43) are movably connected with a load frame (44), and one end of the load frame (44) away from the guide seat (43) is provided with a second rotating wheel (45), and the second rotating wheel (45) is movably connected between the second sliders (322) through the load frame (44).

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