Cylindrical workpiece positioning clamp

Abstract

The utility model relates to the technical field of workpiece positioning, in particular to a cylindrical workpiece positioning clamp, which is used for clamping a cylindrical workpiece and is matched with a three-jaw chuck and a lathe for use, and comprises a clamping body and a connecting body which are fixedly connected with each other, the clamping body and the connecting body are integrally of a cylindrical structure, the clamping body is fixed with the three-jaw chuck and is used for clamping the workpiece, and the connecting body is fixed with the three-jaw chuck. The lathe comprises a rotating part, a connecting body and the rotating part are fixed and used for driving the positioning clamp to rotate, the clamping body and the connecting body are both arranged along the outer end face of the clamping body and the outer end face of the connecting body in an inward concave mode, and air guide holes are formed in the middles of the concave positions of the clamping body and the connecting body and used for balancing air pressure. The clamping body and the connecting body at the two ends of the positioning clamp are arranged in a sunken mode, the air guide holes are formed in the positioning clamp, the connecting stability of the positioning clamp, a three-jaw chuck and a lathe is improved, connection is firm, and a workpiece is prevented from being driven to deviate.

Description

Technical Field

[0001] This utility model relates to the field of workpiece positioning technology, specifically a cylindrical workpiece positioning fixture. Background Technology

[0002] A positioning fixture is a tool used to fix a workpiece and ensure its accurate position during machining or assembly. It is widely used in machining, assembly, inspection and welding. Through its two main functions of positioning and clamping, it keeps the workpiece in a stable state on the machining equipment, thereby ensuring machining accuracy and efficiency.

[0003] However, in the existing technology, there is a problem that the fixture connection is not stable, causing it to deviate from the central axis, which in turn causes the workpiece to shift, resulting in processing failure.

[0004] Chinese patent document CN212217818U discloses a tooling fixture with fixed performance that is easy to adjust the angle. The structure allows the user to adjust the fixed angle of the workpiece by rotating the fixture fixing plate. However, it does not disclose how to solve the problem of unstable fixture connection, which causes it to deviate from the central axis, thereby causing the workpiece to shift and resulting in processing failure.

[0005] In summary, the problem to be solved is how to design a cylindrical workpiece positioning fixture that is structurally stable, reliably connected, and does not deviate from the central axis during rotational machining, thus preventing the workpiece from shifting and causing machining failure. Utility Model Content

[0006] The purpose of this invention is to provide a cylindrical workpiece positioning fixture to solve the above problems.

[0007] To achieve the above objectives, the following technical solutions are provided:

[0008] A cylindrical workpiece positioning fixture for clamping cylindrical workpieces, used in conjunction with a three-jaw chuck and a lathe, includes: a clamping body and a connecting body fixedly connected to each other. Both the clamping body and the connecting body are cylindrical in shape. The clamping body is fixed to the three-jaw chuck for clamping the workpiece. The lathe includes a rotating component. The connecting body is fixed to the rotating component for driving the positioning fixture to rotate. Both the clamping body and the connecting body are recessed inward along their outer ends. Both recesses have air guide holes in the middle for balancing air pressure. The recesses of the clamping body are stepped from the outside inward, forming a first inner recess and a second inner recess in sequence. The recesses of the connecting body form a connecting portion. The first inner recess, the second inner recess, and the connecting portion all have openings for connecting the three-jaw chuck and the rotating component.

[0009] Preferably, the first concave portion has positioning holes evenly formed along its side wall surface. The positioning holes penetrate the clamping body. The clamping body is connected to the three-jaw chuck by positioning hole bolts. The connecting portion has two connecting holes formed along its side wall surface. The included angle between the two connecting holes is 90°. The connecting body is connected to the rotating component by connecting hole bolts.

[0010] Preferably, the positioning fixture further includes a limiting post, which is fixedly connected to the clamping body and the connecting body respectively, and its two ends are respectively limited in the air guide holes of the clamping body and the connecting body.

[0011] Preferably, the positioning fixture further includes a reinforcing sleeve, which is fitted onto the outer wall surface of the second concave portion.

[0012] Preferably, the outer wall surface of the second concave portion is provided with a threaded hole, and a bolt seat is provided on the reinforcing sleeve located at the threaded hole. The two are bolted together through the threaded hole and the bolt seat.

[0013] Preferably, the rotating component is disposed on the outside of the positioning fixture, the front end of the rotating component is provided with a through hole, and the middle part is provided with a concave hole, the concave hole and the connecting hole have the same diameter, and the concave hole is located above the connecting hole.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model improves the connection stability with the three-jaw chuck and lathe by recessing the clamping body and connecting body at both ends of the positioning fixture and setting air guide holes inside, ensuring a reliable connection and preventing the workpiece from shifting.

[0016] 2. This utility model improves the stability of the positioning fixture by bolting the bolt seat to the bolt hole of the second concave part, so as to maintain rotational balance during rotation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the cooperation between the present invention and the rotating component. Figure 1 ;

[0018] Figure 2 This is a schematic diagram illustrating the cooperation between the present invention and the rotating component. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the structure of the present invention. Figure 3 ;

[0022] Figure 6 This is a schematic diagram of the structure of the present invention. Figure 4 ;

[0023] In the picture:

[0024] 1-clamping body, 101-first concave part, 102-second concave part, 103-positioning hole;

[0025] 2-Connector, 201-Connecting part, 202-Connecting hole;

[0026] 3-Rotating component, 301-Concave hole;

[0027] 4-Limit pins;

[0028] 5-Reinforcing sleeve, 501-Bolt seat;

[0029] 6-Air guide hole; Detailed Implementation

[0030] The technical solutions illustrated in the schematic diagrams of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figure 1-6 As shown, a cylindrical workpiece positioning fixture is used to clamp cylindrical workpieces and is used in conjunction with a three-jaw chuck and a lathe. It includes a clamping body 1 and a connecting body 2 fixedly connected to each other. Both the clamping body 1 and the connecting body 2 are cylindrical in shape. The clamping body 1 is fixed to the three-jaw chuck for clamping the workpiece. The lathe includes a rotating component 3, and the connecting body 2 is fixed to the rotating component 3 for driving the positioning fixture to rotate. Both the clamping body 1 and the connecting body 2 are recessed inwards along their outer ends, and each recess has an air guide hole 6 in the middle for balancing air pressure. The clamping body 1 has a stepped design from the outside to the inside, forming a first recess 101 and a second recess 102 in sequence. The connecting body 2 has a connecting part 201 in its recess. The first recess 101, the second recess 102, and the connecting part 201 all have openings for connecting the three-jaw chuck and the rotating part 3. The clamping body 1 and the connecting body 2 at both ends of the positioning fixture are recessed, and air guide holes 6 are provided inside, which improves the connection stability with the three-jaw chuck and the lathe, making the connection reliable and preventing the workpiece from shifting.

[0032] In some embodiments, the first recess 101 is provided with positioning holes 103 evenly along its side wall surface. The positioning holes 103 penetrate the clamping body 1. The clamping body 1 and the three-jaw chuck are bolted together through the positioning holes 103. The connecting part 201 is provided with two connecting holes 202 along its side wall surface. The included angle between the two connecting holes 202 is 90°. The connecting body 2 and the rotating part 3 are bolted together through the connecting holes 202.

[0033] In some embodiments, the positioning fixture further includes a limiting post 4, which is fixedly connected to the clamping body 1 and the connecting body 2 respectively, and its two ends are respectively limited in the air guide holes 6 of the clamping body 1 and the connecting body 2.

[0034] In some embodiments, the positioning clamp further includes a reinforcing sleeve 5, which is sleeved on the outer wall surface of the second recess 102;

[0035] In some embodiments, the outer wall surface of the second recess 102 is provided with a threaded hole, and the reinforcing sleeve 5 located at the threaded hole is provided with a bolt seat 501. The two are bolted together through the threaded hole and the bolt seat 501. By using the reinforcing sleeve 5 and providing the bolt seat 501 on it, and bolting the bolt seat 501 to the bolt hole of the second recess 102, the stability of the positioning fixture is improved, so that it can maintain rotational balance during rotation.

[0036] In some embodiments, the rotating member 3 is disposed on the outside of the positioning fixture. The front end of the rotating member 3 is provided with a through hole, and the middle part is provided with a concave hole 301. The concave hole 301 has the same diameter as the connecting hole 202, and the concave hole 301 is located above the connecting hole 202.

Claims

1. A cylindrical workpiece positioning fixture for clamping cylindrical workpieces, used in conjunction with a three-jaw chuck and a lathe, characterized in that, include: The clamping body (1) and the connecting body (2) are fixedly connected to each other. The clamping body (1) and the connecting body (2) are both cylindrical structures. The clamping body (1) is fixed to the three-jaw chuck and is used to clamp the workpiece. The lathe includes a rotating part (3). The connecting body (2) is fixed to the rotating part (3) and is used to drive the positioning fixture to rotate. The clamping body (1) and the connecting body (2) are both recessed inward along their outer end faces. The middle of the recess of both is provided with an air guide hole (6) for balancing air pressure. The recess of the clamping body (1) is set in a stepped shape from the outside to the inside, and a first inner recess (101) and a second inner recess (102) are formed in sequence. The recess of the connecting body (2) forms a connecting part (201). The first inner recess (101), the second inner recess (102) and the connecting part (201) are all provided with holes for connecting the three-jaw chuck and the rotating part (3).

2. The cylindrical workpiece positioning fixture according to claim 1, characterized in that, The first recessed portion (101) has positioning holes (103) evenly provided along its side wall surface. The positioning holes (103) are provided through the clamping body (1). The clamping body (1) is bolted to the three-jaw chuck through the positioning holes (103). The connecting portion (201) has two connecting holes (202) provided along its side wall surface. The included angle between the two connecting holes (202) is 90°. The connecting body (2) is bolted to the rotating part (3) through the connecting holes (202).

3. A cylindrical workpiece positioning fixture according to claim 2, characterized in that, The positioning fixture also includes a limiting post (4), which is fixedly connected to the clamping body (1) and the connecting body (2) respectively, and its two ends are respectively limited in the air guide holes (6) of the clamping body (1) and the connecting body (2).

4. A cylindrical workpiece positioning fixture according to claim 3, characterized in that, The positioning fixture also includes a reinforcing sleeve (5), which is fitted onto the outer wall surface of the second concave portion (102).

5. A cylindrical workpiece positioning fixture according to claim 4, characterized in that, The outer wall of the second recess (102) is provided with a threaded hole, and the reinforcing sleeve (5) located at the threaded hole is provided with a bolt seat (501). The two are bolted together by the threaded hole and the bolt seat (501).

6. A cylindrical workpiece positioning fixture according to claim 5, characterized in that, The rotating component (3) is disposed on the outside of the positioning fixture. The front end of the rotating component (3) is provided with a through hole, and the middle part is provided with a concave hole (301). The concave hole (301) has the same diameter as the connecting hole (202), and the concave hole (301) is located above the connecting hole (202).

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