Pneumatic clamping jig

Abstract

The utility model discloses an air pressure clamping jig which comprises a base, a first fixing seat arranged on the base, a positioning block arranged on one side, facing a workpiece, of the first fixing seat, and a positioning groove matched with the workpiece is formed in the positioning block. The second fixing seat is arranged on the base, the driving part is arranged on the side, facing the workpiece, of the second fixing seat, and an output shaft of the driving part moves along a preset path so as to be close to or away from the workpiece. The workpiece is preliminarily positioned through the positioning block, the notch shape of the positioning groove is matched with that of the workpiece, so that the workpiece is limited and simply fixed, the workpiece is prevented from moving, the positioning accuracy during workpiece clamping is improved, the clamping assembly gets close to or away from the workpiece along a preset path, and the workpiece clamping precision is improved. And the whole device is tightly attached to the workpiece, so that the clamping firmness is improved, and the clamping precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing auxiliary device technical field, especially a kind of pneumatic clamping fixture. BACKGROUND

[0002] In modern manufacturing industry, with the diversification and individualization development of product, for some irregular shape, complex structure and have specific processing requirements workpiece, traditional standardization clamping fixture often cannot satisfy its accurate clamping and efficient processing needs.

[0003] These non-standard workpieces need specially designed clamping fixture to guarantee its position accuracy and stability during processing, and existing general clamping equipment has the problems of insecure clamping, inaccurate positioning and poor universality when facing such non-standard workpieces, which affects the processing quality and production efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of pneumatic clamping fixture to solve the problem of clamping and positioning difficulty in the prior art when non-standard workpiece is processed, improve processing accuracy and production efficiency, meet specific production process needs.

[0005] The utility model provides a kind of pneumatic clamping fixture, comprising:

[0006] Base, workpiece is provided on the base;

[0007] Positioning assembly, the positioning assembly includes first fixed seat and positioning block, the first fixed seat is set on the base, the positioning block is set on the side of the first fixed seat towards the workpiece, positioning groove that is adapted to the workpiece is opened in the positioning block, so that the workpiece is limited in the positioning groove;

[0008] Clamping assembly, the clamping assembly is oppositely arranged with the positioning assembly, the clamping assembly includes second fixed seat and driving part, the second fixed seat is set on the base, the driving part is set on the side of the second fixed seat towards the workpiece, the output shaft of the driving part moves along preset path to be close to or away from the workpiece.

[0009] The utility model as above discloses a kind of pneumatic clamping fixture, wherein, preferably, the driving part includes cylinder.

[0010] The utility model as above discloses a kind of pneumatic clamping fixture, wherein, preferably, the base is provided with pad, the position of the pad corresponds with the position of the workpiece, and the pad is used to receive the workpiece.

[0011] The air pressure clamping jig as claimed in any one of the preceding claims, wherein preferably, a first mounting hole is formed on the base, and the first mounting hole is positioned corresponding to the position of the cushion block, and the cushion block is connected with the first mounting hole through an adjusting bolt.

[0012] The air pressure clamping jig as claimed in any one of the preceding claims, wherein preferably, a second mounting hole is formed on the positioning block, and the positioning block is detachably connected with the first fixing seat through the second mounting hole by means of an adjusting bolt.

[0013] The air pressure clamping jig as claimed in any one of the preceding claims, wherein preferably, a pressing block is arranged on the end face of the output shaft of the air cylinder.

[0014] The air pressure clamping jig as claimed in any one of the preceding claims, wherein preferably, a groove adapted to the workpiece is formed on the side of the pressing block away from the air cylinder.

[0015] Compared with the prior art, the positioning block is used for preliminarily positioning the workpiece, the notch shape of the positioning groove is adapted to the workpiece, so that the special structure of the non-standard workpiece is met, the workpiece can be limited and simply fixed, and displacement of the workpiece is prevented, thereby improving the positioning accuracy when the workpiece is clamped, the driving member in the clamping assembly is used for approaching or moving away from the workpiece along a preset path, so as to clamp and release, the groove is formed on the pressing block, so that the device and the workpiece are tightly fitted during clamping, the clamping firmness and the clamping accuracy are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of the air pressure clamping jig provided by the embodiment of the utility model;

[0017] Figure 2 is a sectional view of the air pressure clamping jig provided by the embodiment of the utility model;

[0018] Figure 3 is a perspective view of the positioning assembly provided by the embodiment of the utility model;

[0019] Figure 4 is a perspective view of the clamping assembly provided by the embodiment of the utility model.

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 1-base, 10-first mounting hole;

[0022] 2-positioning assembly, 20-first fixing seat, 21-positioning block, 22-positioning groove;

[0023] 3-clamping assembly, 30-second fixed seat, 31-cylinder, 32-pressing block, 33-groove, 34-first gas port, 35-second gas port;

[0024] 4-workpiece;

[0025] 5-pad. DETAILED DESCRIPTION

[0026] The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model and cannot be explained as a limitation of the utility model.

[0027] The utility model provides a kind of air pressure clamping jig, including pedestal 1, positioning assembly 2 and clamping assembly 3, the workpiece 4 to be clamped is set on pedestal 1, workpiece 4 is preliminarily fixed by positioning assembly 2, then workpiece 4 is clamped by clamping assembly 3.

[0028] Referring to Figure 1 , Figure 2 And Figure 3 It is shown in the embodiments provided in the present application, positioning assembly 2 includes first fixed seat 20 and positioning block 21, first fixed seat 20 is set on pedestal 1, and positioning block 21 is set on the side of first fixed seat 20 facing workpiece 4. In the embodiment, positioning block 21 can preliminarily fix workpiece 4.

[0029] The side of positioning block 21 facing workpiece 4 is provided with positioning groove 22 matched with workpiece 4, and workpiece 4 cooperates with positioning groove 22 to be limited in positioning groove 22. Since the shapes of non-standard workpieces are different, especially the surfaces of some non-standard workpieces are uneven or have irregular shapes, and in order to meet the universality, the clamping part of general clamping jig is usually a plane, which is easy to cause insufficient clamping force or damage non-standard workpieces when clamping non-standard workpieces. In order to fit the shape of workpiece 4, positioning groove 22 matched with the surface of workpiece 4 is provided on positioning block 21. Positioning groove 22 not only can play the role of perfect fitting, but also can limit workpiece 4 in its groove, to avoid the deviation of workpiece 4 during clamping. The specific shape of positioning groove 22 can be demoulding to workpiece 4 first, and then injection molding. For different workpieces 4, as long as the shape of positioning groove 22 on positioning block 21 is changed, the requirements of different non-standard workpieces can be met.

[0030] The clamping assembly 3 is arranged opposite to the positioning assembly 2, the clamping assembly 3 comprises a second fixing seat 30 and a driving member, the second fixing seat 30 is arranged on the base 1, the driving member is arranged on one side of the second fixing seat 30 facing the workpiece 4, the output shaft of the driving member moves along a preset path to approach or move away from the workpiece 4, after the positioning assembly 2 positions and fixes the workpiece 4, the workpiece 4 is clamped and released by the clamping assembly 3, the preset path is the distance that the output shaft of the driving member reaches the workpiece 4, which can be set according to different workpieces 4, in addition, different workpieces 4 have different clamping modes, for this application, the clamping assembly 3 is arranged opposite to the positioning assembly 2, and the clamping effect of applying force to the two sides of the workpiece 4 in the same direction is the best.

[0031] In a feasible implementation manner, the driving member comprises a cylinder 31, the driving member adopts the cylinder 31 as a power source, the cylinder 31 can provide stable and accurate clamping force, through accurate air pressure control, the size of the clamping force can be flexibly adjusted according to the material, size and processing process requirement of different workpieces 4, effectively avoiding the situation that the workpiece 4 is loosened to affect the processing precision due to insufficient clamping force, or the workpiece 4 is damaged due to excessive clamping force, in the embodiment, the top of the cylinder 31 is provided with a first air port 34 and a second air port 35, air is blown to the first air port 34 and the second air port 35 respectively to realize the reciprocating motion of the output shaft of the cylinder 31, so that it can move along the preset path to approach or move away from the workpiece 4, those skilled in the art should know that the cylinder 31 is only a preferred embodiment in the application, and other driving members will not be described here.

[0032] Further, referring to Figures 1-2 As shown, the base 1 is provided with a pad 5, the position of the pad 5 corresponds to the position of the workpiece 4, the pad 5 is used for supporting the workpiece 4, the pad 5 can effectively avoid friction, collision and scratching caused by direct contact between the workpiece 4 and the base 1, in addition, the pad 5 can also be set to a shape matched with the surface of the workpiece 4, the workpiece 4 can be limited and positioned in multiple directions through the pad 5 and the positioning groove 22, thereby improving the clamping precision of the workpiece 4, in the embodiment, in order to make the workpiece 4 bear force uniformly, the length of the pad 5 is greater than or equal to the length of the workpiece 4.

[0033] In order to meet the height requirement of different workpieces 4, the base 1 is provided with a first mounting hole 10, the position of the first mounting hole 10 corresponds to the position of the pad 5, the pad 5 is connected with the first mounting hole 10 through an adjusting bolt, the pad 5 can also play a role of height fixing, by adjusting the relative height of the pad 5 and the base 1, the height requirement of different workpieces 4 can be met, so that the positioning assembly 2 and the workpiece 4 can be located on the same horizontal line.

[0034] Further, referring to Figure 3As shown, in order to adapt to different shapes of non-standard workpieces, a second mounting hole is formed in the positioning block 21, the positioning block 21 is detachably connected with the first fixing seat 20 through the second mounting hole and the adjusting bolt, and the positioning block 21 is detachably mounted with the first fixing seat 20. When facing workpieces 4 of different shapes, sizes and processing requirements, the positioning block 21 with the positioning groove 22 of a specific shape and size can be quickly replaced without the need to re-adjust or replace the entire structure of the first fixing seat 20. In addition, the relative position between the positioning block 21 and the first fixing seat 20 can be adjusted to better match the positioning block 21 with the workpiece 4.

[0035] In a feasible implementation manner, referring to Figures 1-2 As shown in FIGS. 4 and 5, the end face of the output shaft of the air cylinder 31 is provided with a pressing block 32, which can uniformly and effectively distribute the output force of the air cylinder 31 on the surface of the workpiece 4. The pressing block 32 can increase the contact area with the workpiece 4 and play a certain buffering and protection role, thereby ensuring that the workpiece 4 is uniformly stressed during clamping and effectively preventing the workpiece 4 from being deformed or damaged due to excessive local pressure.

[0036] Further, referring to Figure 4 As shown, a groove 33 matched with the workpiece 4 is formed in the side of the pressing block 32 away from the air cylinder 31. The groove 33 can accurately match the contour of the workpiece 4 and play a role of positioning and supporting. During clamping, the groove 33 and the positioning groove 22 can be tightly matched with the workpiece 4, thereby greatly reducing the displacement possibility of the workpiece 4 during clamping and ensuring that the position of the workpiece 4 can be accurately reproduced each time of processing. In addition, the output shaft of the air cylinder 31 and the pressing block 32 can be detachably connected, so that only the pressing block 32 needs to be replaced.

[0037] The working principle of the air pressure clamping jig in the present application is as follows: the workpiece 4 is placed in the positioning groove 22, the bottom of the workpiece 4 is attached to the pad 5, which represents that the workpiece 4 has been initially connected with the positioning assembly 2, air is blown to the second air port 35 of the air cylinder 31, the output shaft of the air cylinder 31 drives the pressing block 32 to move along the preset path to the direction of the workpiece 4, and the workpiece 4 is clamped after abutting against the workpiece 4. After the workpiece 4 is processed, air is blown to the first air port 34 of the air cylinder 31, the output shaft of the air cylinder 31 drives the pressing block 32 to return to the initial position along the preset path. At this time, the workpiece 4 can be taken off from the positioning assembly 2. For different specifications of the workpiece 4, the matching positioning block 21 and pressing block 32 can be replaced. In addition, the height of the pad 5 can be adjusted to meet the needs of different workpieces 4. The present application can satisfy the clamping of different workpieces 4, make the clamping firm, the positioning accurate, and improve the processing quality of the product.

[0038] The above detailed the structure, features and effect of the present application according to the embodiments shown in the drawings, the above is only a preferred embodiment of the present application, but the present application is not limited by the drawings shown in the implementation range, any change or modification according to the concept of the present application, or the equivalent embodiment of equivalent change, still not beyond the spirit of the specification and drawings, should be within the scope of the present application.

Claims

1. An air pressure clamping jig characterized by comprising: The utility model relates to a workpiece positioning device, which comprises a base, a positioning assembly and a clamping assembly. The base is provided with a workpiece. The positioning assembly comprises a first fixing seat and a positioning block. The first fixing seat is arranged on the base.

2. The air pressurized clamp jig according to claim 1, wherein The positioning block is arranged on the side of the first fixing seat facing the workpiece.

3. The air pressurized clamp jig according to claim 1, wherein A positioning groove is formed on the positioning block to match the workpiece.

4. The air pressurized clamp jig according to claim 3, wherein The workpiece is positioned in the positioning groove.

5. The air pressurized clamp jig according to claim 1, wherein The clamping assembly is arranged opposite to the positioning assembly.

6. The air pressurized clamp jig according to claim 2, wherein The clamping assembly comprises a second fixing seat and a driving member.

7. The air pressurized clamp jig according to claim 6, wherein The second fixing seat is arranged on the base. The driving member is arranged on the side of the second fixing seat facing the workpiece. The output shaft of the driving member moves along a preset path to approach or move away from the workpiece. The driving member comprises a pneumatic cylinder. The base is provided with a pad block. The position of the pad block corresponds to the position of the workpiece. The pad block is used for supporting the workpiece. A first mounting hole is formed on the base. The position of the first mounting hole corresponds to the position of the pad block. The pad block is connected with the first mounting hole through an adjusting bolt. A second mounting hole is formed on the positioning block. The positioning block is detachably connected with the first fixing seat through the second mounting hole. A pressing block is arranged on the end face of the output shaft of the pneumatic cylinder. A groove is formed on the side of the pressing block away from the pneumatic cylinder. The groove matches the workpiece.

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