Three-jaw chuck soft jaw outer circle correction tool

Abstract

A kind of soft jaw outer circle correction tool of three-jaw chuck, including base, the base is arranged in the working face central of three-jaw chuck, the base is peripherally divided and is provided with three length-adjustable hooks, the inner end of three hooks is fixedly connected with base respectively, the outer end of three hooks is respectively hooked in the outer end of three claw bodies, by adjusting the length of three hooks, the claw body is hooked tightly, the radial activity gap of the claw body is eliminated, and then when turning the outer circle of soft jaw, the position of the claw body remains unchanged.The utility model overcomes the prior art deficiencies.

Description

Technical Field

[0001] This utility model relates to the field of chuck soft jaw repair technology, and in particular to a tooling for correcting the outer diameter of a three-jaw chuck soft jaw. Background Technology

[0002] In lathe machining, self-centering chucks are typically used to clamp and position workpieces. The jaws of a self-centering chuck are divided into positive jaws and negative jaws. Positive jaws generate clamping force by contracting inwards, used to hold the outer surface of the workpiece (shafts, cylinders); negative jaws generate clamping force by expanding outwards, used to hold the inner surface of the workpiece (round tubes). Positive and negative jaws each have soft and hard jaws. Hard jaws are used for rough machining, while soft jaws are used for finish machining. However, when the clamping accuracy of the soft jaws decreases, it severely affects the machining accuracy. Replacing only the soft jaws or replacing the entire chuck is too costly. Therefore, the soft jaws must be corrected before finish machining to ensure the precision of the finish.

[0003] Currently, when correcting the reverse jaw of a soft jaw, the correction is generally performed by fitting a circular tooling around the jaw body (see...). Figure 4 This method eliminates radial clearance after the claw body is adjusted into position, ensuring the positioning accuracy of the soft claw and thus improving the correction accuracy. However, when correcting reverse claws with different outer diameters, it is necessary to frequently change rings of different specifications. Therefore, this ring tooling has poor versatility, resulting in low correction efficiency and high usage costs. Utility Model Content

[0004] This utility model provides a tooling for correcting the outer diameter of the soft jaws of a three-jaw chuck, in order to overcome the shortcomings of the prior art.

[0005] The technical solution adopted in this utility model is: a three-jaw chuck soft jaw outer diameter correction fixture, including a base, the base being disposed in the center of the working surface of the three-jaw chuck, and three adjustable-length hooks being equally distributed around the periphery of the base, the inner ends of the three hooks being fixedly connected to the base, and the outer ends of the three hooks being hooked onto the outer ends of the three jaw bodies respectively. By adjusting the length of the three hooks, the jaw bodies are hooked tightly, eliminating the radial movement clearance of the jaw bodies, so that the position of the jaw bodies remains unchanged when turning the outer diameter of the soft jaw.

[0006] The base is a circular ring structure; and the circular ring structure is provided with three first threaded holes evenly spaced around the circumference.

[0007] The hook consists of an L-shaped fixing seat, an adjusting sleeve, and a first L-shaped hook. The vertical section of the L-shaped fixing seat has an external thread, and the horizontal section has a first through hole. The L-shaped fixing seat is fixed to the base by a screw passing through the first through hole and threaded into the first threaded hole. One end of the inner hole of the adjusting sleeve is a second threaded hole, and the other end is a through hole. The inner diameter of the second threaded hole is larger than the inner diameter of the through hole, so that the connection between the second threaded hole and the through hole forms an annular shoulder. The first L-shaped hook is movably connected to one end of the adjusting sleeve by an annular flange at the end of its vertical section engaging with the annular shoulder. The other end of the adjusting sleeve is connected to the L-shaped fixing seat by the second threaded hole engaging with the external thread. The length of the hook is adjusted by rotating the adjusting sleeve, so that the horizontal section of the first L-shaped hook is hooked onto the outer end of the claw body.

[0008] The adjusting sleeve is a circular adjusting sleeve with a counterslip on its outer circumference.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. This utility model, by adjusting the length of the hook claw, meets the needs of soft claw reverse claw correction operations with different outer diameters; compared with the prior art, it has good versatility, high correction efficiency, and low operating cost.

[0011] 2. This utility model supports quick switching between reverse claw and forward claw correction modes. By removing the claw and keeping only the screws connecting the claw around the base, it can be quickly converted into a forward claw correction fixture. Furthermore, by rotating the screws, it can adapt to the forward claw correction requirements of different inner diameters, significantly improving versatility and operational efficiency.

[0012] 3. This utility model has a novel design, simple structure, low cost, and is easy to operate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0014] Figure 2 This is a cross-sectional schematic diagram of Embodiment 1 of this utility model;

[0015] Figure 3 This is a cross-sectional schematic diagram of the adjustable hook structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the existing technology structure. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in detail with reference to specific embodiments.

[0018] A tooling for correcting the outer diameter of a soft jaw in a three-jaw chuck includes a base 1, which is located at the center of the working surface of the three-jaw chuck 6. Three adjustable-length hooks 2 are evenly distributed around the base 1. The inner ends of the three hooks 2 are fixedly connected to the base 1, and the outer ends of the three hooks 2 are hooked onto the outer ends of three jaw bodies 3. By adjusting the length of the three hooks 2, the jaw bodies 3 are hooked tightly, eliminating the radial clearance of the jaw bodies 3. Thus, when turning the outer diameter of the soft jaw 5, the position of the jaw bodies 3 remains unchanged.

[0019] In one embodiment, for ease of processing and material saving, the base 1 preferably has a circular ring structure, and the circular ring structure is provided with three first threaded holes 1-1 evenly spaced circumferentially. Of course, the base 1 can also adopt a cylindrical structure, an equilateral triangular structure, a regular hexagonal structure, etc.

[0020] In one embodiment, the hook 2 is composed of an L-shaped fixing seat 2-1, an adjusting sleeve 2-2, and a first L-shaped hook 2-3. The vertical section of the L-shaped fixing seat 2-1 has an external thread 2-1-1, and the horizontal section has a first through hole 2-1-2. The L-shaped fixing seat 2-1 is threaded to the first threaded hole 1-1 by a screw 4 passing through the first through hole 2-1-2, thus fixing the L-shaped fixing seat 2-1 to the base 1. The inner hole of the adjusting sleeve 2-2 has a second threaded hole 2-2-1 at one end and a through hole 2-2-2 at the other end, and the inner diameter of the second threaded hole 2-2-1 is greater than that of the base 1. The inner diameter of the through hole 2-2-2 is adjusted so that the connection between the second threaded hole 2-2-1 and the through hole 2-2-2 forms an annular shoulder; the first L-shaped hook 2-3 is movably connected to one end of the adjusting sleeve 2-2 through the annular flange 2-3-1 at the end of its vertical section and the annular shoulder; the other end of the adjusting sleeve 2-2 is connected to the L-shaped fixed seat 2-1 through the second threaded hole 2-2-1 and the external thread 2-1-1; the length of the hook 2 is adjusted by rotating the adjusting sleeve 2-2 so that the horizontal section of the first L-shaped hook 2-3 is hooked to the outer end of the claw body 3.

[0021] In one embodiment, the adjusting sleeve 2-2 is a circular adjusting sleeve with a counter 2-2-3 on its outer circle, which facilitates wrench mounting and rotation of the adjusting sleeve 2-2.

[0022] In practical applications, the soft jaw 5 is typically welded to the outer end face of the jaw body 3. Before the correction operation, the soft jaw 5 is first adjusted to a suitable cutting position using a chuck wrench. Then, the correction fixture is installed on the chuck 6, and the hook 2 is hooked onto the outer end of the jaw body 3. The length of the hook 2 is adjusted by rotating the adjusting sleeve 2-2 to tighten the hook of the jaw body 3, eliminating the radial clearance of the three jaw bodies 3. Thus, when turning the outer diameter of the soft jaw 5, the positions of the three jaw bodies 3 remain unchanged, ensuring the machining accuracy when turning the outer diameter of the soft jaw 5. Furthermore, the length of the hook 2 can be adjusted by rotating the adjusting sleeve 2-2 to adapt to the correction operation of the outer diameter of the soft jaw 5 with different outer diameters, overcoming the problems of poor versatility, low efficiency, and high cost that exist in the existing technology of using a ring fixture for the correction operation of the outer diameter of the soft jaw.

[0023] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Therefore, all equivalent variations made based on the content described in the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A tooling for correcting the outer diameter of a three-jaw chuck's soft jaws, characterized in that: Includes a base (1), which is located in the center of the working surface of the three-jaw chuck (6). Three adjustable-length hooks (2) are evenly distributed around the base (1). The inner ends of the three hooks (2) are fixedly connected to the base (1), and the outer ends of the three hooks (2) are hooked onto the outer ends of the three jaw bodies (3). By adjusting the length of the three hooks (2), the jaw bodies (3) are hooked tightly, eliminating the radial movement clearance of the jaw bodies (3). Thus, when turning the outer circle of the soft jaw (5), the position of the jaw body (3) remains unchanged.

2. The three-jaw chuck soft jaw outer diameter correction fixture according to claim 1, characterized in that: The base (1) is a ring structure; and the ring structure is provided with three first threaded holes (1-1) evenly spaced around the perimeter.

3. The three-jaw chuck soft jaw outer diameter correction fixture according to claim 1, characterized in that: The hook (2) is composed of an L-shaped fixing seat (2-1), an adjusting sleeve (2-2), and a first L-shaped hook (2-3). The vertical section of the L-shaped fixing seat (2-1) has an external thread (2-1-1), and the horizontal section has a first through hole (2-1-2). The L-shaped fixing seat (2-1) is threaded to the first threaded hole (1-1) by a screw (4) passing through the first through hole (2-1-2), thus fixing the L-shaped fixing seat (2-1) to the base (1). The inner hole of the adjusting sleeve (2-2) is composed of a second threaded hole (2-2-1) at one end and a through hole (2-2-2) at the other end, and the inner diameter of the second threaded hole (2-2-1) is larger than that of the through hole (2-2-2). The inner diameter of the hole (2-2-2) is such that the connection between the second threaded hole (2-2-1) and the through hole (2-2-2) forms an annular shoulder; the first L-shaped hook (2-3) is movably connected to one end of the adjusting sleeve (2-2) through the annular flange (2-3-1) at the end of its vertical section and the annular shoulder; the other end of the adjusting sleeve (2-2) is connected to the L-shaped fixed seat (2-1) through the second threaded hole (2-2-1) and the external thread (2-1-1); the length of the hook (2) is adjusted by rotating the adjusting sleeve (2-2) so that the horizontal section of the first L-shaped hook (2-3) is hooked to the outer end of the claw body (3).

4. The three-jaw chuck soft jaw outer diameter correction fixture according to claim 3, characterized in that: The adjusting sleeve (2-2) is a circular adjusting sleeve with a counter (2-2-3) on its outer circle.

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