A collet chuck

Abstract

The utility model relates to spring collet technical field, concretely relates to a spring collet, including collet, locking sleeve and spacing semicircle cover, locking sleeve sets up on collet, spacing semicircle cover sets up on collet, when clamping the work piece of different outer diameter, only need to replace spacing semicircle cover of different inner diameter, guarantee work piece clamping precision to reach the clamping effect to work piece, simultaneously need not to replace collet to reduce spring collet manufacturing cost.

Description

Technical Field

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

[0002] In the field of high-energy beam welding, traditional rigid fixtures are prone to insufficient local clamping force due to machining errors or thermal deformation of the weldment, which can lead to welding defects.

[0003] To solve this problem, existing solutions typically employ spring collets. Previously used spring collets were primarily employed in high-energy beam welding fields such as laser welding and electron beam welding to clamp small- to medium-diameter straight ring structures, enabling the chuck, spring collet, and workpiece to rotate synchronously, in the same direction, and at the same speed, while simultaneously welding workpieces 1 and 2. The spring collet consists of a collet head and a locking sleeve. Its working principle is as follows: Workpiece 1 is manually placed on the collet head. Because the locking sleeve and collet head are connected by threads, rotating the locking sleeve clockwise moves it to a position relative to the left of the collet head. Simultaneously, the tapered portion of the locking sleeve presses against the collet head, causing the inner radial portion of the collet head to contract inward, thereby clamping workpiece 1 and achieving synchronous, same-direction, and same-speed movement of the workpiece and the fixture.

[0004] In the field of beam welding, for circumferential welded structures, the workpiece clamping method often uses a three-jaw chuck to directly clamp the part, achieving coaxial rotation and synchronous welding. With the development of the manufacturing industry, product structures have also become more diversified. Traditional clamping methods can no longer meet the specific product structures (such as stepped rings) and are difficult to meet the high-precision welding requirements. Therefore, a clamping device that can adapt to different small and medium diameters, complex stepped rings, high-precision clamping and repeatable positioning, and reliable clamping force is needed. Spring collets have emerged as a result. Utility Model Content

[0005] The purpose of this utility model is to provide a spring collet that solves the problem that the existing spring collet structure and working principle determine that it is usually suitable for workpieces with regular shape and single diameter, but for workpieces with steps or different diameters, the spring collet is difficult to achieve uniform and reliable clamping.

[0006] To achieve the above objectives, this utility model provides a spring collet, including a collet, a locking sleeve, and a limiting semicircular sleeve. The locking sleeve is disposed on the collet and located on one side of the collet, and the limiting semicircular sleeve is disposed on the collet and located on the side of the collet closer to the locking sleeve.

[0007] The spring collet also includes an internal hexagon screw, which is disposed on the collet and located on one side of the collet.

[0008] The collet has a first thread and a second thread, wherein the first thread is located on one side of the collet, and the second thread is located on the side of the collet closer to the internal hex screw.

[0009] The chuck also has a conical surface, which is located on one side of the chuck.

[0010] The chuck also has hexagonal threaded petals, which are located on one side of the chuck.

[0011] The spring collet further includes a shaft step, which is connected to the collet and located on one side of the collet.

[0012] This utility model discloses a spring chuck in which a limiting semicircular sleeve is used to wrap around the position where the second workpiece needs to be clamped, and the entire workpiece is placed in the chuck. The first workpiece and the limiting semicircular sleeve are placed in place until the first workpiece is pushed to the end face of the screw and does not move. The stepped end face of the limiting semicircular sleeve is in close contact with the chuck. The locking sleeve is placed on the chuck. By rotating the locking sleeve counterclockwise, the locking sleeve moves forward along the axial direction of the chuck. Simultaneously, the conical part of the locking sleeve presses against the conical part of the chuck, causing the hexagonal thread petals of the chuck to move radially. The limiting semicircular sleeve, which contacts the inner diameter of the hexagonal petals, is subjected to radial pressure. The limiting semicircular sleeve also moves radially along with the hexagonal petals until the inner diameter of the limiting semicircular sleeve clamps the outer diameter of the second workpiece. This achieves tight clamping of the second workpiece by the chuck. Finally, under the clamping of the chuck, the spring collet rotates due to the rotation of the chuck, causing the spring collet to rotate and the second workpiece to rotate at the same speed. By applying welding energy synchronously, the welding of the first and second workpieces is completed after one rotation. Thus, when clamping workpieces with different outer diameters, only the limiting semicircular sleeves with different inner diameters need to be replaced to ensure workpiece clamping accuracy, thereby achieving the same function as existing clamping devices without replacing the chuck, thereby reducing the manufacturing cost of the spring collet. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the spring clip of this utility model.

[0015] Figure 2 This is a schematic diagram of the limiting semicircular sleeve of this utility model.

[0016] Figure 3 This is a schematic diagram of the chuck of this utility model.

[0017] In the figure: 101-clamp, 102-locking sleeve, 103-limiting semi-circular sleeve, 104-internal hex screw, 105-shaft step, 106-first thread, 107-second thread, 108-conical surface, 109-hex thread petal, 201-first workpiece, 202-second workpiece. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0019] Please see Figures 1 to 3 ,in Figure 1 This is a schematic diagram of the spring clip of this utility model. Figure 2 This is a schematic diagram of the limiting semicircular sleeve of this utility model. Figure 3 This is a schematic diagram of the chuck of this utility model.

[0020] This utility model provides a spring collet, including a collet 101, a locking sleeve 102, a limiting semi-circular sleeve 103, an internal hexagonal screw 104, and a shaft step 105. The collet 101 has a first thread 106, a second thread 107, a conical surface 108, and hexagonal thread petals 109. This solution solves the problem that existing spring collets, due to their structure and working principle, are generally suitable for workpieces with regular shapes and uniform diameters, but struggle to achieve uniform and reliable clamping for workpieces with steps or varying diameters.

[0021] In this embodiment, the chuck 101 is a key component, enabling precise workpiece clamping. The outer diameter of the clamping end of the chuck 101 is machined into the first thread 106, and the front end is machined into a 20° conical surface 108. A 0.5mm wide and 30mm deep square slot is cut into the front end using wire cutting, with an angle of 60° between each slot, forming the hexagonal thread petals 109. The clamping force is achieved as follows: by rotating the locking sleeve 102, which is placed on the front end of the chuck 101, clockwise rotation causes the locking sleeve 102 to move axially closer to the chuck 101, while the conical surface 108 of the locking sleeve 102 compresses the hexagonal conical surface 108 petals of the chuck 101. Because the hexagonal petals have elasticity in the radial direction, the hexagonal petals of the chuck 101 will uniformly contract inward, thus achieving the clamping function.

[0022] The locking sleeve 102 is disposed on the chuck 101 and located on one side of the chuck 101. The limiting semicircular sleeve 103 is disposed on the chuck 101 and located on the side of the chuck 101 close to the locking sleeve 102. The front end of the chuck 101, where the workpiece needs to be clamped, is first machined with a standard first thread 106, an inner hole, and a tapered surface 108, etc. Then, a certain width of elastic groove is machined using wire cutting to form the hexagonal thread petals 109 with a certain taper. The main function of the chuck 101 is that the hexagonal thread petals 109 rotate and move through the locking sleeve 102, and the tapered surface 108 of the locking sleeve 102 radially compresses the hexagonal petals, causing the hexagonal thread petals to rotate. The inner diameter of the corner petals decreases uniformly. The locking sleeve 102 is composed of a ring body with an internal structure consisting of a straight thread and a certain taper. Its main function is to place the locking sleeve 102 on the hexagonal threaded petals 109 of the chuck 101. Through the threaded rotation transmission, the taper part of the locking sleeve 102 squeezes the hexagonal petals. The limiting semicircular sleeve 103 is composed of two semicircular stepped rings. The limiting semicircular sleeve 103 is placed inside the hexagonal petals in the chuck 101. Its main function is to reduce the inner diameter of the hexagonal petals of the chuck 101 body by uniform force, so that the inserted limiting semicircular sleeve 103 is also subjected to compression. The inner ring of the limiting semicircular sleeve 103 will precisely clamp the parts. Meanwhile, by setting different inner ring diameters, workpieces of different diameters can be clamped. This allows for the creation of a set of ring chucks 101 with the same outer diameter but different inner diameters by manufacturing the limiting semicircular sleeve 103 component. When clamping workpieces of different outer diameters, only the limiting semicircular sleeve 103 with different inner diameters needs to be replaced to ensure workpiece clamping accuracy, thereby achieving the same function as existing clamping devices without replacing the chuck 101, thus reducing the manufacturing cost of spring chucks.

[0023] Secondly, the hex socket screw 104 is disposed on the chuck 101 and located on one side of the chuck 101. The shaft step 105 is connected to the chuck 101 and located on one side of the chuck 101. The shaft step 105 is provided at the tail end of the chuck 101 for clamping and positioning by the three-jaw chuck. At the same time, the second internal thread 107 is machined inside the chuck 101. By screwing the hex socket screw 104 into the chuck to different depths, the position of workpieces of different lengths in the chuck 101 can be achieved. In this way, the welding position of the workpiece is kept the same when the three-jaw chuck is clamped in each batch, thereby realizing the workpiece repetitive positioning function.

[0024] Finally, a cavity with a slightly larger diameter can be machined inside the chuck 101 to place workpieces with complex structures. With the customized limiting semicircular sleeve 103, the workpiece clamping is not limited to straight ring structures, but also adaptable to multi-step structures.

[0025] When using a spring collet according to this embodiment, the limiting semicircular sleeve 103 is used to wrap around the second workpiece 202 at the clamping position and is placed in the collet 101 as a whole. The first workpiece 201 and the limiting semicircular sleeve 103 are placed in place until the first workpiece 201 is pushed to the end face of the screw and does not move. The stepped end face of the limiting semicircular sleeve 103 is close to the collet 101. The locking sleeve 102 is placed on the chuck 101. By rotating the locking sleeve 102 counterclockwise, the locking sleeve 102 will move forward along the axial direction of the chuck 101. At the same time, the conical surface 108 of the locking sleeve 102 will press against the conical surface 108 of the chuck 101, causing the hexagonal thread petals 109 of the chuck 101 to move radially. The limiting semicircular sleeve 103, which is in contact with the inner diameter of the hexagonal petals, is subjected to radial pressure. The limiting semicircular sleeve 103 also moves radially along with the hexagonal petals until the inner diameter of the limiting semicircular sleeve 103 clamps the second working part. The outer diameter of workpiece 202 is adjusted to achieve tight clamping of the second workpiece 202 by the chuck 101. Finally, under the clamping of the chuck, the spring collet rotates due to the rotation of the chuck, which in turn drives the second workpiece 202 to rotate at the same speed. By applying welding energy synchronously, the welding of the first workpiece 201 and the second workpiece 202 is completed after one rotation. Thus, when clamping workpieces with different outer diameters, only the limiting semicircular sleeve 103 with different inner diameters needs to be replaced to ensure the workpiece clamping accuracy, thereby achieving the same function as the existing clamping device without replacing the chuck 101, thereby reducing the manufacturing cost of the spring collet.

[0026] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A spring collet, characterized in that, It includes a chuck, a locking sleeve, and a limiting semicircular sleeve. The locking sleeve is disposed on the chuck and located on one side of the chuck. The limiting semicircular sleeve is disposed on the chuck and located on the side of the chuck closer to the locking sleeve.

2. The spring collet as described in claim 1, characterized in that, The spring collet also includes an internal hexagon screw, which is disposed on the collet and located on one side of the collet.

3. The spring collet as described in claim 2, characterized in that, The collet has a first thread and a second thread, the first thread being located on one side of the collet; the second thread being located on the side of the collet closer to the internal hex screw.

4. The spring collet as described in claim 3, characterized in that, The chuck also has a conical surface located on one side of the chuck.

5. The spring collet as described in claim 4, characterized in that, The chuck also has hexagonal threaded petals located on one side of the chuck.

6. The spring collet as described in claim 2, characterized in that, The spring collet also includes a shaft step, which is connected to the collet and located on one side of the collet.

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