Pneumatic inner supporting clamp for lathe of aluminum piston

Abstract

The utility model provides a pneumatic inner support clamp for a lathe of an aluminum piston, relates to the technical field of inner support clamps, and aims to solve the technical problems of poor size and inner hole damage caused by the fact that an inner expansion clamp in the prior art is easy to deform the aluminum piston. A pneumatic inner supporting clamp for a lathe of an aluminum piston comprises a diaphragm type pneumatic chuck. The inner expanding claw comprises a claw disc, an inner supporting block and a connecting block, the claw disc and the inner supporting block are both cylindrical, the inner supporting block and the connecting block are arranged on the front end face and the rear end face of the claw disc respectively, the inner supporting block and the claw disc are coaxially arranged, and a plurality of first through grooves which are distributed at equal intervals in the circumferential direction and penetrate through the claw disc in the radial direction and the axial direction are formed in the claw disc. A plurality of first through grooves are formed in the claw disc, the claw disc is equally divided into a plurality of sub clamping claws through the first through grooves, each first through groove extends to the inner supporting block and penetrates through the inner supporting block in the radial direction and the axial direction, the inner supporting block is equally divided into a plurality of clamping blocks through the first through grooves, the connecting blocks are connected with the sub clamping claws, and each sub clamping claw is fixedly connected with the diaphragm type pneumatic chuck.

Description

Technical Field

[0001] This utility model relates to the field of internal support fixture technology, specifically to a pneumatic internal support fixture for a lathe with an aluminum piston. Background Technology

[0002] Because aluminum pistons are relatively soft and thin-walled, and require high precision in outer diameter and surface quality, internal expansion clamping is necessary during turning to prevent scratching the piston's outer diameter. Furthermore, the internal expansion clamping must ensure uniform and moderate force on the aluminum piston to prevent deformation during machining, thereby improving product accuracy and reducing quality loss. However, existing internal expansion clamps are mostly pull-back type. This fixing method results in uneven force on the inner wall of the product and excessive force, easily causing deformation and dimensional defects. Additionally, the protruding pull rod head during clamping can easily damage the inner hole and bottom. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a pneumatic internal support fixture for aluminum pistons on a lathe, so as to solve the technical problem that the internal expansion fixture in the prior art is prone to deforming the aluminum piston, resulting in dimensional defects and damage to the inner hole.

[0004] To solve the above technical problems, this utility model provides a pneumatic internal support fixture for a lathe with an aluminum piston, comprising:

[0005] Diaphragm pneumatic chuck;

[0006] The internal expansion chuck includes a chuck disc, an internal support block, and a connecting block. Both the chuck disc and the internal support block are cylindrical. The internal support block and the connecting block are respectively located on the front and rear faces of the chuck disc. The internal support block is coaxially arranged with the chuck disc. The chuck disc has several first through slots that are equidistantly distributed circumferentially and penetrate the chuck disc radially and axially. The several first through slots divide the chuck disc into several sub-chucks. Each first through slot extends to the internal support block and penetrates the internal support block radially and axially. The several first through slots divide the internal support block into several locking blocks. The connecting block connects each sub-chuck, and each sub-chuck is fixedly connected to the diaphragm pneumatic chuck.

[0007] With the above structure, the pneumatic internal support fixture for aluminum pistons on lathes of this utility model has the following advantages: By changing the type of chuck and the internal expansion principle structure, the diaphragm pneumatic chuck is more suitable for thin-walled parts such as pistons due to its higher precision and convenient adjustment of clamping force. Furthermore, the use of equally divided sub-jaws and chuck blocks in the internal expansion jaws further improves the uniformity of the internal support force, thereby solving the problem of product outer diameter deformation after machining and improving product machining accuracy. Replacing the rear pull-type structure solves the problem of contact between the pull rod and the inner hole of the aluminum piston, avoiding the risk of inner hole damage and reducing quality costs.

[0008] As an improvement, the connecting block is circular and coaxially arranged with the claw disk; this structure makes the deformation of the connecting block more uniform when it deforms as each sub-claw moves.

[0009] As an improvement, the front end face of the connecting block is provided with several second through slots at equal intervals along the circumference, which correspond one-to-one with the positions of the first through slots. The second through slots penetrate the inner and outer walls of the connecting block. This structure makes it easier for the connecting block to deform as the sub-claws move, while also ensuring that each sub-claw is connected and fixed by the integral connecting block.

[0010] As an improvement, the side wall of the connecting block is provided with several through holes that correspond one-to-one with the second through slots at equal intervals along the circumference, and each through hole is connected to one of the second through slots; this structure makes the connecting block more easily deformable as the sub-claw moves.

[0011] As an improvement, the front face of the diaphragm pneumatic chuck is provided with several protrusions at equal intervals along the circumference, and each sub-jaw is fixedly connected to one of the protrusions. With this structure, the protrusions are not only used to connect with each sub-jaw, but also leave space between each sub-jaw and the diaphragm pneumatic chuck to accommodate the connecting block.

[0012] As an improvement, there are eight sub-claws and eight clamping blocks; this structure further prevents product deformation and improves product processing accuracy. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a three-dimensional structural diagram of the inner expansion claw part in this utility model.

[0015] Figure 3 for Figure 2 A magnified view of part A in the middle.

[0016] Figure 4 This is a three-dimensional structural diagram of the diaphragm-type pneumatic chuck in this utility model.

[0017] Figure 5 This is a three-dimensional structural diagram of an aluminum piston.

[0018] Reference numerals: 1. Diaphragm pneumatic chuck; 2. Internal expansion claw; 21. Claw disc; 211. Sub-claw; 22. Internal support block; 221. Claw block; 23. Connecting block; 3. First through slot; 4. Second through slot; 5. Through hole; 6. Boss. Detailed Implementation

[0019] The following is a detailed description of a pneumatic internal support fixture for a lathe with an aluminum piston, based on the present invention, with reference to the accompanying drawings.

[0020] like Figures 1 to 4 As shown, a pneumatic internal support fixture for lathes is used to clamp aluminum pistons, such as... Figure 5 The aluminum piston product shown includes a diaphragm pneumatic chuck 1 and an inner expansion claw 2. The inner expansion claw 2 includes a claw disc 21, an inner support block 22 and a connecting block 23. Both the claw disc 21 and the inner support block 22 are cylindrical. The inner support block 22 and the connecting block 23 are respectively located on the front end face and the rear end face of the claw disc 21. The front end face refers to the end face facing the aluminum piston product.

[0021] like Figure 1 and Figure 2 As shown, the inner support block 22 is coaxially arranged with the claw disk 21, so that the inner support block 22 is located at the center of the claw disk 21. The claw disk 21 is provided with several first through slots 3 that are equidistantly distributed along the circumference and penetrate the claw disk 21 radially and axially. The several first through slots 3 divide the claw disk 21 into several sub-claws 211. Each sub-claw 211 is fan-shaped. Each first through slot 3 extends to the inner support block 22 and penetrates the inner support block 22 radially and axially. The several first through slots 3 divide the inner support block 22 into several clamping blocks 221. Each clamping block 221 is also fan-shaped. One sub-claw 211 corresponds to one clamping block 221. The connecting block 23 connects each sub-claw 211. Each sub-claw 211 is fixedly connected to the diaphragm pneumatic chuck 1.

[0022] like Figure 2 and Figure 3 As shown, the connecting block 23 is circular and coaxially arranged with the claw disk 21. The front end face of the connecting block 23 is provided with several second through slots 4 at equal intervals along the circumference, which correspond one-to-one with the positions of the first through slots 3. The second through slots 4 penetrate the inner and outer walls of the connecting block 23. Furthermore, several through holes 5 are provided at equal intervals along the circumference on the side wall of the connecting block 23, which correspond one-to-one with the second through slots 4. Each through hole 5 is connected to one of the second through slots 4.

[0023] In this embodiment, there are a total of four first through slots 3, resulting in eight sub-claws 211 and eight claw blocks 221. The inner expansion claw 2 is made of 65Mn spring steel and heat-treated to a hardness of 40HRC. Then, the inner expansion claw 2 is divided into eight pieces by precision wire cutting. Specifically, the first through slots 3 are cut on the inner support block 22 and the claw disk 21 during precision wire cutting, and the second through slots 4 are cut on the connecting block 23. The inner support block 22 is machined into a cylindrical shape that is about 1mm larger than the inner diameter of the aluminum piston, and the claw disk 21 is a cylindrical shape with a diameter of about 100mm.

[0024] like Figure 4As shown, the front end face of the diaphragm pneumatic chuck 1 is provided with a plurality of protrusions 6 at equal intervals along the circumference. In this embodiment, there are eight protrusions 6, and each sub-jaw 211 is fixedly connected to one of the protrusions 6. Each sub-jaw 211 is provided with a hole with a diameter of 9.0 mm for fixing the sub-jaw 211 to the protrusion 6 by bolts. Since the connecting block 23 is not completely cut, the connecting block 23 can enable the sub-jaws 211 to be connected to each other.

[0025] After connecting the inner expansion claw 2 to the diaphragm pneumatic chuck 1 and fixing it to the equipment, the outer diameter of the inner support block 22 is machined with an external turning tool to fit the inner hole of the aluminum piston to ensure the concentricity and fit of the parts.

[0026] This clamp utilizes a diaphragm-type pneumatic chuck 1. The elastic deformation of the diaphragm causes the inner expansion claw 2 to deform, thus clamping the aluminum piston. When the diaphragm-type pneumatic chuck 1 is inlet, it exerts outward pressure on the diaphragm, causing the diaphragm to deform. Since the sub-claw 211 in the inner expansion claw 2 is connected to the diaphragm by screws, the sub-claw 211 and the clamping block 221 are pushed open, and the connecting block 23 deforms accordingly. The outer diameter of the inner support block 22 increases, thus tightening the aluminum piston. When the diaphragm-type pneumatic chuck 1 is deleting air, the diaphragm is subjected to reverse suction, thereby restoring its original shape or moving in the opposite direction, that is, releasing the aluminum piston.

[0027] This invention, by changing the type of chuck and the internal expansion principle structure, utilizes the advantages of the diaphragm pneumatic chuck 1, such as high precision and easy adjustment of clamping force, which are more suitable for thin-walled piston parts. Furthermore, by using the equally divided sub-claws 211 and clamping blocks 221 of the internal expansion claw 2, the uniformity of the internal support force is further improved, thereby solving the problem of product outer diameter deformation after machining and improving product machining accuracy. Replacing the rear pull-type structure solves the problem of contact between the pull rod and the inner hole of the aluminum piston, avoiding the risk of inner hole damage and reducing quality costs.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A lathe fixture for the pneumatic internal support of an aluminum piston, characterized by, The utility model relates to a diaphragm type pneumatic chuck (1) and an inner expanding claw (2) comprising a claw disc (21), an inner supporting block (22) and a connecting block (23), wherein the claw disc (21) and the inner supporting block (22) are both cylindrical, the inner supporting block (22) and the connecting block (23) are respectively arranged on the front end face and the rear end face of the claw disc (21), the inner supporting block (22) is coaxially arranged with the claw disc (21), a plurality of first through grooves (3) are arranged on the claw disc (21) and extend through the claw disc (21) along the radial direction and the axial direction, the first through grooves (3) divide the claw disc (21) into a plurality of sub-claws (211), each first through groove (3) extends to the inner supporting block (22) and extends through the inner supporting block (22) along the radial direction and the axial direction, the first through grooves (3) divide the inner supporting block (22) into a plurality of clamping blocks (221), the connecting block (23) is connected with each sub-claw (211), and each sub-claw (211) is fixedly connected with the diaphragm type pneumatic chuck (1). The connecting block (23) is annular and coaxially arranged with the claw disc (21). A plurality of second through grooves (4) corresponding to the first through grooves (3) are arranged on the front end face of the connecting block (23) along the circumferential direction at equal intervals, and the second through grooves (4) extend through the inner and outer walls of the connecting block (23).

2. The air-actuated internal support clamp for turning aluminum pistons of claim 1, wherein, A plurality of through holes (5) corresponding to the second through grooves (4) are arranged on the side wall of the connecting block (23) along the circumferential direction at equal intervals, and each through hole (5) is in communication with one second through groove (4).

3. The air-actuated internal support clamp for turning aluminum pistons of claim 2, wherein, A plurality of bosses (6) are arranged on the front end face of the diaphragm type pneumatic chuck (1) along the circumferential direction at equal intervals, and each sub-claw (211) is fixedly connected with one boss (6).

4. The air-actuated internal support clamp for turning aluminum pistons of claim 3, wherein, The number of sub-claws (211) and clamping blocks (221) is eight.

5. The air-actuated internal support clamp for turning aluminum pistons of claim 1 wherein, ​ 6. The air-actuated inside clamp for turning aluminum pistons of claim 1, wherein, ​

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