Pipe machining clamp

Abstract

The utility model discloses a pipe machining clamp which comprises a pneumatic chuck body, the pneumatic chuck body comprises a base plate and a plurality of guide blocks arranged on the upper side of the base plate around the axis of the base plate in an annular array mode, the clamp further comprises a plurality of clamping jaws installed on the upper sides of the guide blocks, and limiting grooves matched with the guide blocks are formed in the lower ends of the clamping jaws. The guide block is embedded into the limiting groove and attached to the upper side of the limiting groove, the guide block abuts against the left side and the right side of the limiting groove, the side face of the lower end of the clamping jaw is in threaded connection with a first fastener, the first fastener abuts against the side face of the guide block, and the inner side and the outer side of the clamping jaw are each provided with an arc face coaxial with the base plate. The ratio of the distance between the upper and lower ends of the cambered surface to the length of the to-be-processed pipe is greater than or equal to 50%. According to the pipe machining clamp, the locking effect is improved, and the clamping jaw can be used for locking pipes of two specifications.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, and in particular to a pipe processing fixture. Background Technology

[0002] Existing pipe processing methods utilize pneumatic chucks as clamps. As shown in patent application number CN202321738734.0, these existing processing clamps include a base, multiple guide blocks arranged circumferentially on the upper side of the base, and jaws locked to the guide blocks. The inner end face of each jaw is curved, and each jaw is custom-made with its inner curved surface radius matching the outer diameter of the pipe to be processed. When the jaws clamp the pipe, the curved surface is in close contact with the outer wall of the pipe. However, due to the relatively small height of the existing jaws, they can only clamp the lower end of the pipe, resulting in a small contact area and poor clamping effect. Furthermore, existing processing clamps can only clamp one type of pipe. When processing multiple pipe specifications, this undoubtedly increases the number of custom-made jaws, increasing costs and the workload of changing jaws. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of existing pipe processing fixtures, this utility model proposes a pipe processing fixture that increases the locking effect and whose jaws can be used to lock two specifications of pipes.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pipe processing fixture includes a pneumatic chuck body, which includes a chassis and multiple guide blocks arranged in a ring array around the chassis axis on the upper side of the chassis. The fixture also includes multiple jaws mounted on the upper side of the guide blocks. The lower end of the jaws is provided with a limiting groove adapted to the guide blocks. The guide blocks are embedded in the limiting grooves and fit against the upper side of the limiting grooves. The guide blocks abut against the left and right sides of the limiting grooves. A first fastener is threaded to the lower side of the jaws and abuts against the side of the guide blocks. The inner and outer sides of the jaws are respectively provided with arc surfaces coaxial with the chassis. The ratio of the distance between the upper and lower ends of the arc surfaces to the length of the pipe to be processed is greater than or equal to 50%.

[0006] With the above configuration, both the inner and outer sides of the jaws are equipped with arc surfaces, which can be used to lock two specifications of pipes, thereby reducing processing costs. In addition, the jaws are longer, and when locking the pipes, the arc surface has a larger contact area with the jaws, improving the clamping effect.

[0007] Furthermore, the guide block is provided with an inverted V-shaped first support surface on both the left and right sides, and the lower end of the chuck is threaded with a first fastener on both sides. The end of the first fastener near the guide block is vertically pressed against the first support surface.

[0008] The above settings ensure that the upper side of the guide block is firmly attached to the bottom of the limiting groove, preventing the chuck from moving upwards and ensuring machining accuracy.

[0009] Furthermore, a radially extending guide groove is provided on the upper side of the chassis. The guide block includes a drive block, a slider, a mounting base, and a second fastener. The drive block is slidably connected in the guide groove and is pneumatically driven. A radially extending slide groove is provided on the upper side of the drive block. The slider is slidably connected in the slide groove. A threaded hole is provided on the upper side of the slider. The mounting base is provided with a mounting hole that passes through the upper and lower sides. The second fastener passes through the mounting hole and is threadedly connected to the threaded hole. The drive block and the mounting base are tightly fitted together. The lower end of the pawl is mounted on the mounting base.

[0010] The above settings facilitate the adjustment of the mounting position on the drive block, both internally and externally.

[0011] Furthermore, multiple first saw teeth are arranged radially on the upper side of the drive block, and multiple second saw teeth are arranged radially on the lower side of the mounting base, with the first saw teeth and the second saw teeth meshing with each other.

[0012] The above settings further enhance the stability of the mounting base and the jaws.

[0013] Furthermore, the cross-section of the groove is an inverted T-shape, which is adapted to the cross-section of the slider.

[0014] The above settings ensure that the slider can only slide back and forth along the groove.

[0015] Furthermore, a horizontal second support surface is provided at the lower end of the curved surface.

[0016] With the above setup, the lower end of the pipe to be processed can abut against the second support surface, facilitating pipe positioning.

[0017] Furthermore, the grippers are made of stainless steel.

[0018] The above settings prevent the clamps from rusting, thus preventing rust residue from remaining on the pipe when the clamps hold it. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the fixture used in an embodiment.

[0020] Figure 2 This is a top view of the fixture used in the embodiment.

[0021] Figure 3 for Figure 2 AA sectional view.

[0022] Figure 4 for Figure 2 BB cross-sectional view. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0024] like Figures 1 to 4 As shown, a pipe processing fixture includes a pneumatic chuck body, which includes a base 3 and multiple guide blocks 4 arranged in a ring array around the axis of the base 3 on the upper side of the base 3. The fixture also includes multiple jaws 5 mounted on the upper side of the guide blocks 4. The lower end of the jaws 5 is provided with a limiting groove 6 adapted to the guide blocks 4. The guide blocks 4 are embedded in the limiting groove 6 and fit against the upper side of the limiting groove 6. The guide blocks 4 and the left and right sides of the limiting groove 6 abut against each other. The lower side of the jaws 5 is threaded with a first fastener 7, which abuts against the side of the guide blocks 4. The inner and outer sides of the jaws 5 are respectively provided with arc surfaces 8 coaxial with the base 3. The ratio of the distance between the upper and lower ends of the arc surfaces 8 to the length of the pipe to be processed is greater than or equal to 50%.

[0025] With the above configuration, the inner and outer sides of the jaw 5 are provided with arc surfaces 8, which can be used to lock two specifications of pipes, thereby reducing processing costs. In addition, the jaw 5 is relatively long, and when locking the pipe, the arc surface 8 has a larger contact area with the jaw 5, which improves the clamping effect.

[0026] The pneumatic chuck body of this application can refer to existing pneumatic chucks, and its upper guide block 4 can open and close radially under pneumatic drive to lock or release the pipe to be processed; such as Figure 3 As shown, the radial direction of each jaw 5 is the front-to-back direction, as indicated by the position. Figure 4 As shown, the tangential direction of each claw 5 is to the left and right sides; after the guide block 4 is inserted into the limiting groove 6, the claw 5 can only slide back and forth along the guide block 4. After tightening the first fastener 7, the claw 5 is stably locked onto the guide block 4 under the action of friction between the first fastener 7 and the guide block 4; as shown Figure 2 As shown, this application has three clamping jaws 5. When using the clamp of this application, after the pipe is placed vertically between the clamping jaws 5, the pneumatically driven guide block 4 and the clamping jaws 5 simultaneously clamp the pipe inward, and the outer wall of the pipe is pressed against the inner arc surface 8 to lock the pipe; or, another pipe with a larger inner diameter is vertically placed on the three clamping jaws 5, and the pneumatically driven guide block 4 and the clamping jaws 5 move outward simultaneously. After the outer arc surface 8 is pressed against the inner wall of the pipe, the pipe is locked; that is, each set of clamping jaws 5 of the clamp of this application can be used to lock two specifications of pipes; in this application, the ratio of the distance between the upper and lower ends of the arc surface 8 to the length of the pipe to be processed is greater than or equal to 50%, and at least half of the length of the pipe is locked, resulting in a better locking effect. In addition, the central angle α of the inner arc surface 8 is greater than 50°, and the central angle b of the outer arc surface 8 is greater than 45°, further increasing the contact surface between the clamping jaws 5 and the pipe, preventing the clamping jaws 5 from damaging the pipe.

[0027] As one implementation, the guide block 4 is provided with an inverted V-shaped first support surface 9 on the left and right sides, and the lower end of the claw 5 is threaded with a first fastener 7 on both sides. The end of the first fastener 7 closest to the guide block 4 is vertically pressed against the first support surface 9.

[0028] The above settings ensure that the upper side of the guide block 4 is tightly attached to the bottom of the limiting groove 6, preventing the chuck 5 from moving upward and ensuring machining accuracy.

[0029] like Figure 4 As shown, when the first fastener 7 is tightened, the end of the first fastener 7 applies an upward force to the first support surface 9. According to the principle of force decomposition, the claw 5 is separated downward, so that the bottom of the limiting groove 6 on the lower side of the claw 5 can always be in close contact with the upper side of the guide block 4, thereby improving the stability of the claw 5.

[0030] As one implementation, a radially extending guide groove 10 is provided on the upper side of the chassis 3. The guide block 4 includes a drive block 41, a slider 42, a mounting base 43, and a second fastener 44. The drive block 41 is slidably connected in the guide groove 10 and is pneumatically driven. A radially extending slide groove 411 is provided on the upper side of the drive block 41. The slider 42 is slidably connected in the slide groove 411. A threaded hole 421 is provided on the upper side of the slider 42. The mounting base 43 is provided with a mounting hole 431 that passes through the upper and lower sides. The second fastener 44 passes through the mounting hole 431 and is threadedly connected to the threaded hole 421. The drive block 41 and the mounting base 43 are tightly fitted together. The lower end of the pawl 5 is mounted on the mounting base 43.

[0031] The above settings facilitate the adjustment of the position of the mounting base 43 on the drive block 41.

[0032] Specifically, the guide groove 10 is inverted T-shaped and matches the cross-sectional shape of the drive block 41. The drive block 41 can slide back and forth along the guide groove 10 under pneumatic drive without moving up, down, left, or right. When the second locking member is loosened, the lower side of the mounting seat 43 is released from the upper side of the drive block 41. The mounting seat 43 can move back and forth along the slide groove 411 with the slider 42 to adjust the position of the mounting seat 43. After adjustment, the second locking member is tightened, and the lower side of the mounting seat 43 is pressed against the upper side of the drive block 41, locking the mounting seat 43 on the upper side of the drive block 41.

[0033] As one implementation, the upper side of the drive block 41 is provided with a plurality of first saw teeth 412 along the radial direction, and the lower side of the mounting base 43 is provided with a plurality of second saw teeth 432 along the radial direction, and the first saw teeth 412 and the second saw teeth 432 mesh with each other.

[0034] The above settings further enhance the stability of the mounting base 43 and the claw 5.

[0035] As one implementation method, the cross-section of the groove 411 is an inverted T-shape, which is adapted to the cross-section of the slider 42.

[0036] With the above settings, the slider 42 can only slide back and forth along the groove 411.

[0037] As one implementation method, a horizontal second support surface 11 is provided at the lower end of the arc surface 8.

[0038] With the above settings, the lower end of the pipe to be processed can abut against the second support surface 11, which facilitates the positioning of the pipe.

[0039] As one implementation method, the claw 5 is made of stainless steel.

[0040] The above settings prevent the chuck 5 from rusting, thereby preventing rust residue from remaining on the pipe when the chuck 5 clamps the pipe.

[0041] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A pipe processing fixture, characterized in that, The device includes a pneumatic chuck body, which includes a chassis and multiple guide blocks arranged in a ring array around the chassis axis on the upper side of the chassis. The clamp also includes multiple jaws mounted on the upper side of the guide blocks. The lower end of each jaw is provided with a limiting groove adapted to the guide block. The guide block is embedded in the limiting groove and fits against the upper side of the limiting groove. The guide block abuts against the left and right sides of the limiting groove. A first fastener is threaded to the lower side of the jaw and abuts against the side of the guide block. The inner and outer sides of each jaw are respectively provided with arc surfaces coaxial with the chassis. The ratio of the distance between the upper and lower ends of the arc surfaces to the length of the pipe to be processed is greater than or equal to 50%.

2. The pipe processing fixture according to claim 1, characterized in that, The guide block has an inverted V-shaped first support surface on its left and right sides. The lower end of the claw is threaded with the first fastener on both sides. The end of the first fastener near the guide block is vertically pressed against the first support surface.

3. The pipe processing fixture according to claim 1, characterized in that, The upper side of the chassis is provided with a radially extending guide groove. The guide block includes a drive block, a slider, a mounting base, and a second fastener. The drive block is slidably connected in the guide groove and is pneumatically driven. The upper side of the drive block is provided with a radially extending slide groove. The slider is slidably connected in the slide groove. The upper side of the slider is provided with a threaded hole. The mounting base is provided with a mounting hole that passes through the upper and lower sides. The second fastener passes through the mounting hole and is threadedly connected to the threaded hole. The drive block and the mounting base are tightly fitted together. The lower end of the chuck is mounted on the mounting base.

4. A pipe processing fixture according to claim 3, characterized in that, The upper side of the drive block is provided with a plurality of first saw teeth along the radial direction, and the lower side of the mounting base is provided with a plurality of second saw teeth along the radial direction, wherein the first saw teeth and the second saw teeth mesh with each other.

5. A pipe processing fixture according to claim 3, characterized in that, The cross-section of the groove is inverted T-shaped and is adapted to the cross-section of the slider.

6. A pipe processing fixture according to claim 1, characterized in that, A horizontal second support surface is provided at the lower end of the arc surface.

7. A pipe processing fixture according to claim 1, characterized in that, The jaws are made of stainless steel.

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