Precise metal piece tool clamp

Abstract

The utility model relates to the technical field of precision metal piece machining, and discloses a precision metal piece tool clamp which comprises a workbench, an upper cover is fixedly installed on the top of the workbench, and inner clamping arms are rotatably installed on the two sides of the upper cover through first pin shafts. The two ends of the extrusion column can synchronously extrude the inclined extrusion slopes of the two sets of supporting columns, so that the two sets of supporting columns synchronously move towards the outer side to extrude the two sets of limiting bases, and when the limiting base located at the top moves upwards, the supporting shaft and the inner side of the inner clamping arm can be driven to move upwards; the middle part of the inner clamping arm is rotationally mounted through a pin shaft, so that the outer side of the inner clamping arm can continuously rotate towards the outer side to firmly clamp the inner wall of the circular-ring-shaped metal piece, otherwise, the outer side of the inner clamping arm can continuously rotate towards the inner side to firmly clamp the outer side of the circular-ring-shaped metal piece; the inner clamping arm and the outer clamping arm on the workbench can synchronously clamp the inner side and the outer side of the circular-ring-shaped metal piece, and it is effectively guaranteed that the circular-ring-shaped metal piece is firm and stable on the workbench.

Description

TECHNICAL FIELD

[0001] The utility model relates to precision metal piece processing technical field especially relates to a precision metal piece frock clamp. BACKGROUND

[0002] At present, precision metal piece is the common type among mechanical parts, has the characteristics such as high machining precision, small size tolerance, high surface finish, high dimensional stability, good fatigue resistance and attenuation resistance, and plays an important role in multiple fields.

[0003] Among them, the annular precision metal piece is a kind of metal parts with annular structure and extremely high machining precision, and is also one of conventional precision metal pieces, when the annular precision metal piece is machined, the annular precision metal piece is placed in the clamp, after the annular precision metal piece is clamped outside, it is convenient for operator to machine the annular precision metal piece.

[0004] When the conventional clamp on the market clamps the annular precision metal piece, most of them only clamp the two sides of the outer wall of the annular precision metal piece, the clamping force of which is limited, so that the operator is prone to looseness when cutting the annular precision metal piece, therefore, we propose a precision metal piece frock clamp to solve the above problems, which can clamp the inner and outer sides of the annular precision metal piece simultaneously. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problems in the prior art and provides a precision metal piece frock clamp.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme:

[0007] A precision metal piece frock clamp, comprising: a workbench, the top of the workbench is fixedly installed with an upper cover, the two sides of the upper cover are rotatably installed with inner clamping arms through first pin shafts, the two sides of the inside of the workbench are rotatably installed with outer clamping arms through second pin shafts, and a clamping arm driving mechanism is installed in the inside of the workbench.

[0008] The clamping arm driving mechanism comprises a moving groove horizontally formed in the inside of the workbench, an extrusion column slidingly installed in the moving groove, a piston groove communicated and installed at the top and the bottom of the moving groove, a supporting column movably installed in the two groups of piston grooves, a limiting seat fixedly installed on the other side of the two groups of supporting columns, a limiting groove formed on the two sides of the two groups of limiting seats and a supporting shaft embeddedly installed in each group of limiting grooves.

[0009] Preferably, the two groups of supporting shafts at the top are fixedly installed with the inner sides of the two groups of inner clamping arms respectively, and the two groups of supporting shafts at the bottom are fixedly installed with the inner sides of the two groups of outer clamping arms respectively.

[0010] Preferably, the top of the extrusion column is an inclined extrusion slope, the side of the two groups of support columns is an inclined extrusion slope, and the two sides of the extrusion column correspond to the inclined extrusion slopes of the two groups of support columns, so that the two groups of support columns can be extruded.

[0011] Preferably, the other ends of the limiting seats are fixedly installed with springs, and the other ends of the two groups of springs are fixedly installed with the upper cover and the inner wall of the workbench, so that the limiting seats can be supported.

[0012] Preferably, the side wall of the workbench is communicated with a sealing box at one end, the sealing box is movably installed with a sealing plug in the inner wall, the sealing plug is fixedly installed with a push rod at the middle of one end, and the push rod is fixedly installed with the extrusion column through the side wall of the workbench, so that the extrusion column can be pushed to move left and right.

[0013] Preferably, the side wall of the sealing box is provided with a communication hole, and the outer side of the communication hole is communicated with an air pipe, and the other end of the air pipe is communicated with the air cylinder, so that the air pressure in the sealing box can be increased, and the sealing plug can be pushed.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] When the extrusion column in the driving mechanism of the clamping arm is pushed to move horizontally along the direction of the moving groove, the two ends of the extrusion column will simultaneously extrude the inclined extrusion slopes of the two groups of support columns, so that the two groups of support columns are simultaneously moved outward, the two groups of limiting seats are extruded, when the limiting seat at the top is moved upward, the support shaft and the inner side of the inner clamping arm are moved upward, the middle part of the inner clamping arm is rotatably installed through the pin shaft, the outer side of the inner clamping arm can be continuously rotated outward, and the annular metal piece can be tightly clamped, when the limiting seat at the bottom is moved downward, the support shaft and the inner side of the outer clamping arm are moved downward, the outer side of the inner clamping arm can be continuously rotated inward, and the annular metal piece can be tightly clamped, so that the inner clamping arm and the outer clamping arm on the workbench can simultaneously clamp the inner and outer sides of the annular metal piece, and the annular metal piece is firmly and stably ensured on the workbench.

[0016] When the other ends of the limiting seats are fixedly installed with springs, and the other ends of the two groups of springs are fixedly installed with the upper cover and the inner wall of the workbench, when the operator stops driving the air cylinder, the sealing plug in the sealing box cannot support the push rod and the extrusion column, the supporting force of the two groups of springs can be used to simultaneously support the two groups of limiting seats, the two groups of limiting seats and the support columns are automatically reset, the two groups of inner clamping arms and outer clamping arms are loosened to clamp the inner and outer sides of the annular metal piece, and the operator can take out the annular metal piece on the workbench. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1This is a schematic diagram of the overall structure of a precision metal part tooling fixture proposed in this utility model;

[0018] Fig. 2 This is a schematic diagram of the limiting seat structure of a precision metal part tooling fixture proposed in this utility model;

[0019] Fig. 3 This is a schematic diagram of the extrusion column and support column structure of a precision metal part tooling fixture proposed in this utility model.

[0020] In the diagram: 1. Workbench; 11. Upper cover; 12. Inner clamping arm; 13. Outer clamping arm; 2. Moving groove; 21. Extrusion column; 22. Piston groove; 23. Support column; 24. Limiting seat; 25. Limiting groove; 26. Support shaft; 3. Spring; 31. Sealing box; 32. Sealing plug; 33. Push rod; 34. Air pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figs. 1-3 A precision metal part tooling fixture includes: a workbench 1, an upper cover 11 fixedly installed on the top of the workbench 1, inner clamping arms 12 rotatably installed on both sides of the upper cover 11 via first pins, outer clamping arms 13 rotatably installed on both sides of the inside of the workbench 1 via second pins, and a clamping arm drive mechanism installed inside the workbench 1.

[0023] The clamping arm drive mechanism includes a horizontally opening moving groove 2 inside the workbench 1, a pressing column 21 slidably installed inside the moving groove 2, and a piston groove 22 connected to both the top and bottom of the moving groove 2. Support columns 23 are movably installed in both sets of piston grooves 22, limiting seats 24 are fixedly installed on the other side of both sets of support columns 23, limiting grooves 25 are opened on both sides of both sets of limiting seats 24, and support shafts 26 are embedded in each set of limiting grooves 25. The two sets of support shafts 26 at the top are fixedly installed to the inner sides of the two sets of inner clamping arms 12, and the two sets of support shafts 26 at the bottom are fixedly installed to the inner sides of the two sets of outer clamping arms 13. When the pressing column 21 inside the clamping arm drive mechanism is pushed to move horizontally along the moving groove 2, the two ends of the pressing column 21 simultaneously press against the inclined pressing surfaces of the two sets of support columns 23, causing the two sets of support columns 23 to move outwards synchronously, thus pressing against the two sets of limiting seats 24. When the limiting seat 24 at the top moves upward, it will drive the support shaft 26 and the inner side of the inner clamping arm 12 to move upward. With the inner clamping arm 12 rotated by the pin in the middle, the outer side of the inner clamping arm 12 can rotate outward continuously, firmly clamping the inner wall of the annular metal part. Conversely, when the limiting seat 24 at the bottom moves downward, it will drive the support shaft 26 and the inner side of the outer clamping arm 13 to move downward. This will allow the outer side of the inner clamping arm 12 to rotate inward continuously, firmly clamping the outer side of the annular metal part. This allows the inner clamping arm 12 and the outer clamping arm 13 on the workbench 1 to clamp the inner and outer sides of the annular metal part simultaneously, effectively ensuring that the annular metal part is firm and stable on the workbench 1.

[0024] Furthermore, springs 3 are fixedly installed on the other end of the limiting seat 24. The other ends of the two sets of springs 3 are fixedly installed to the upper cover 11 and the inner wall of the workbench 1, respectively, so as to support the limiting seat 24.

[0025] Furthermore, a sealing box 31 is connected to one end of the side wall of the workbench 1. A sealing plug 32 is movably installed on the inner wall of the sealing box 31. A push rod 33 is fixedly installed at the middle of one end of the sealing plug 32. The push rod 33 passes through the side wall of the workbench 1 and is fixedly installed on the side wall of the extrusion column 21, which can push the extrusion column 21 to move left and right. A connecting hole is opened on the side wall of the sealing box 31. An air pipe 34 is connected to the outside of the connecting hole. The other end of the air pipe 34 is connected to a cylinder, which can increase the air pressure inside the sealing box 31 and push the sealing plug 32. When the cylinder is driven, the air pressure inside the sealing box 31 can be continuously increased, supporting the sealing plug 32 inside the sealing box 31 and pushing the push rod 33 and the extrusion column 21 to move left and right.

[0026] Furthermore, the top and bottom of the extrusion column 21 are both inclined extrusion slopes, and one side of each of the two sets of support columns 23 is also an inclined extrusion slope. The two sides of the extrusion column 21 correspond to the inclined extrusion slopes of the two sets of support columns 23, which can extrude the two sets of support columns 23. When the extrusion column 21 moves left and right, the two ends of the extrusion column 21 will simultaneously extrude the inclined extrusion slopes of the two sets of support columns 23, causing the two sets of support columns 23 to move outward synchronously and extrude the two sets of limiting seats 24.

[0027] In use, the annular metal part requiring precision machining is first placed on the top of the workbench 1, with the inner clamping arm 12 and outer clamping arm 13 distributed on the inner and outer sides of the annular metal part, respectively. Simultaneously, the cylinder is driven to continuously increase the air pressure inside the sealing box 31, supporting the sealing plug 32 inside the sealing box 31. This pushes the push rod 33 and the extrusion column 21 to move left and right. The two ends of the extrusion column 21 simultaneously extrude the inclined extrusion surfaces of the two sets of support columns 23, causing the two sets of support columns 23 to move outwards synchronously, extruding the two sets of limiting seats 24. When the limiting seat 24 at the top moves upwards, it drives the support shaft 26 and the inner side of the inner clamping arm 12 to move upwards. Combined with the pivot mounting of the inner clamping arm 12 in the middle, the outer side of the inner clamping arm 12 continuously rotates outwards, firmly clamping the inner wall of the annular metal part. Conversely, when the limiting seat 24 at the bottom moves downwards, it drives the support shaft 26... As the outer clamping arm 13 moves downward, the outer side of the inner clamping arm 12 rotates inward continuously, firmly clamping the outer side of the annular metal part. This allows the inner clamping arm 12 and outer clamping arm 13 on the workbench 1 to simultaneously clamp the inner and outer sides of the annular metal part, effectively ensuring the annular metal part is firmly and stably on the workbench 1. At the same time, springs 3 are fixedly installed on the other end of the limiting seat 24, and the other ends of the two sets of springs 3 are respectively fixedly installed on the upper cover 11 and the inner wall of the workbench 1. When the operator stops driving the cylinder, the sealing plug 32 inside the sealing box 31 can no longer support the push rod 33 and the extrusion column 21. With the support force of the two sets of springs 3, the two sets of limiting seats 24 can be supported simultaneously, causing the two sets of limiting seats 24 and the support column 23 to automatically reset. This releases the inner clamping arm 12 and outer clamping arm 13 from clamping the inner and outer sides of the annular metal part, making it easier for the operator to remove the annular metal part from the workbench 1.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precision metal parts tooling fixture, characterized in that, include: Workbench (1), with an upper cover (11) fixedly installed on the top of the workbench (1), and inner clamping arms (12) rotatably installed on both sides of the upper cover (11) via a first pin shaft, and outer clamping arms (13) rotatably installed on both sides of the inside of the workbench (1) via a second pin shaft, and a clamping arm drive mechanism installed inside the workbench (1). The clamping arm drive mechanism includes a moving groove (2) laterally opened inside the workbench (1), an extrusion column (21) slidably installed inside the moving groove (2), a piston groove (22) connected to both the top and bottom of the moving groove (2), a support column (23) movably installed in both sets of piston grooves (22), a limiting seat (24) fixedly installed on the other side of both sets of support columns (23), a limiting groove (25) opened on both sides of both sets of limiting seats (24), and a support shaft (26) embedded in each set of limiting grooves (25).

2. The precision metal part tooling fixture according to claim 1, characterized in that, The two sets of support shafts (26) located at the top are fixedly installed on the inner side of the two sets of inner clamping arms (12), and the two sets of support shafts (26) located at the bottom are fixedly installed on the inner side of the two sets of outer clamping arms (13).

3. A precision metal part tooling fixture according to claim 1, characterized in that, The top and bottom of the extrusion column (21) are both inclined extrusion slopes, and one side of each of the two sets of support columns (23) is an inclined extrusion slope. The two sides of the extrusion column (21) correspond to the inclined extrusion slopes of the two sets of support columns (23).

4. A precision metal part tooling fixture according to claim 1, characterized in that, The other end of each limiting seat (24) is fixedly installed with a spring (3), and the other ends of the two sets of springs (3) are fixedly installed with the inner wall of the upper cover (11) and the workbench (1), respectively.

5. A precision metal part tooling fixture according to claim 1, characterized in that, A sealing box (31) is connected to one end of the side wall of the workbench (1). A sealing plug (32) is movably installed on the inner wall of the sealing box (31). A push rod (33) is fixedly installed in the middle of one end of the sealing plug (32). The push rod (33) passes through the side wall of the workbench (1) and is fixedly installed on the side wall of the extrusion column (21).

6. A precision metal part tooling fixture according to claim 5, characterized in that, The The sealing box (31) has a connecting hole on its side wall, and an air pipe (34) is connected to the outside of the connecting hole. The other end of the air pipe (34) is connected to the cylinder.

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