Tool for correcting outer circle of soft claw of self-centering chuck

Abstract

A tool for correcting the outer circle of a soft claw of a self-centering chuck comprises a base, the base is arranged in the center of the working face of the self-centering chuck, a plurality of claws with the adjustable length are arranged on the periphery of the base in the circumferential direction at equal intervals according to the number of claw bodies on the self-centering chuck, the inner ends of the claws are fixedly connected with the base, and the outer circle of the claw bodies is fixedly connected with the base. The outer ends of the plurality of claws are respectively hooked at the outer end of the claw body, the claw body is tightly hooked by adjusting the lengths of the plurality of claws, and the radial movement clearance of the claw body is eliminated, so that the position of the claw body is kept unchanged when the outer circle of the soft claw is turned. By adjusting the length of the claw, reverse claw correction operation of soft claws with different outer diameters is met; compared with the prior art, universality is good, correction efficiency is high, and use cost is low.

Description

Technical Field

[0001] This invention relates to the field of self-centering chuck soft jaw outer diameter correction technology, and in particular to a tooling for self-centering chuck soft jaw outer diameter correction. 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 7 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. Summary of the Invention

[0004] This invention provides a self-centering chuck soft jaw outer diameter correction tool to overcome the shortcomings of the prior art.

[0005] The technical solution adopted in this invention is: a self-centering chuck soft jaw outer diameter correction fixture, including a base, the base being disposed at the center of the working surface of the self-centering chuck, and a plurality of adjustable-length hooks being circumferentially evenly distributed around the periphery of the base according to the number of jaws on the self-centering chuck, the inner ends of the plurality of hooks being fixedly connected to the base, and the outer ends of the plurality of hooks being hooked to the outer ends of the jaws, by adjusting the length of the plurality of hooks to tighten the jaws, eliminating the radial movement clearance of the jaws, thereby keeping the position of the jaws unchanged when turning the outer diameter of the soft jaws.

[0006] The base is a circular ring structure, and the circular ring structure is provided with a number of first threaded holes evenly distributed circumferentially according to the number of claws.

[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 first screw passing through the first through hole and threaded into the first threaded hole. The adjusting sleeve has a second threaded hole at one end and a through hole at the other end, with the inner diameter of the second threaded hole being larger than the inner diameter of the through hole, forming an annular shoulder at the junction of the second threaded hole and the through hole. 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 hook consists of a connecting seat, a second L-shaped hook, and an adjusting bolt. The connecting seat has a second through hole and a connecting hole at both ends. The connecting seat is threaded to the first threaded hole by a second screw passing through the second through hole, thus fixing the connecting seat to the base. The vertical end of the second L-shaped hook has a third threaded hole. The adjusting bolt passes through the connecting hole and is threaded to the third threaded hole, thus connecting the second L-shaped hook to the connecting seat. The length of the hook is adjusted by rotating the adjusting bolt, so that the horizontal section of the second L-shaped hook is hooked to the outer end of the claw body.

[0009] The self-centering chuck has a three-jaw structure, and three corresponding claws are also provided.

[0010] The self-centering chuck has a four-jaw structure, and four corresponding hooks are also provided.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This invention, by adjusting the length of the hook, satisfies the need for soft claw reverse correction operations with different outer diameters; compared with the prior art, it has good versatility, high correction efficiency, and low cost of use.

[0013] 2. This invention supports rapid switching between reverse claw and forward claw correction modes. By removing the claw and keeping only the first or second screw connecting the claw around the base, it can be quickly converted into a forward claw correction fixture. Furthermore, by rotating the screw, it can adapt to the forward claw correction requirements of different inner diameters, significantly improving versatility and operational efficiency.

[0014] 3. This invention has a novel design, simple structure, low cost, and is easy to operate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0016] Figure 2 This is a cross-sectional schematic diagram of Embodiment 1 of the present invention;

[0017] Figure 3 This is a cross-sectional schematic diagram of the hook structure in Embodiment 1 of the present invention;

[0018] Figure 4 This is a cross-sectional schematic diagram of Embodiment 2 of the present invention;

[0019] Figure 5 This is a cross-sectional schematic diagram of the hook structure in Embodiment 2 of the present invention;

[0020] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0021] Figure 7 This is a schematic diagram of the existing technology structure. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in detail below with reference to specific embodiments.

[0023] Example 1, see Figure 1 , 2 3. The self-centering chuck 6 has a three-jaw structure with three jaw bodies 3 and a base 1 at the center of its working surface. Three adjustable-length hooks 2 are evenly distributed around the periphery of 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 three jaw bodies 3 are hooked tightly, eliminating the radial movement gap of the three jaw bodies 3. Thus, when turning the outer diameter of the soft jaw 5, the position of the three jaw bodies 3 remains unchanged, ensuring the machining accuracy when turning the outer diameter of the soft jaw 5.

[0024] In the above embodiments, 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 distributed circumferentially. Of course, the base 1 can also adopt a cylindrical structure, an equilateral triangular structure, a regular hexagonal structure, etc.

[0025] In the above 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 first 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.

[0026] 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.

[0027] Example 2, see Figure 4 , 5The basic structure and application method are the same as those in Embodiment 1, except that: the hook 2 is composed of a connecting seat 2-4, a second L-shaped hook 2-5, and an adjusting bolt 2-6. The connecting seat 2-4 has a second through hole 2-4-1 and a connecting hole 2-4-2 at both ends. The connecting seat 2-4 is threaded to the first threaded hole 1-1 via a second screw 7 passing through the second through hole 2-4-1, thus fixing the connecting seat 2-4 to the base 1. The vertical end of the second L-shaped hook 2-5 has a third threaded hole 2-5-1. The adjusting bolt 2-6 passes through the connecting hole 2-4-2 and is threaded to the third threaded hole 2-5-1, connecting the second L-shaped hook 2-5 to the connecting seat 2-4. The length of the hook 2 is adjusted by rotating the adjusting bolt 2-6, so that the horizontal section of the second L-shaped hook 2-5 hooks tightly to the outer end of the claw body 3.

[0028] Example 3, see Figure 6 The basic structure and application method are the same as those in Embodiment 1 or Embodiment 2, except that the self-centering chuck 6 is a four-jaw structure and the hooks 2 are also provided with four corresponding claws.

[0029] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent variations made to the content described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A tooling for correcting the outer diameter of a self-centering chuck soft jaw, characterized in that: Includes a base (1), which is located at the center of the working surface of the self-centering chuck (6). The outer periphery of the base (1) is circumferentially divided into several adjustable hooks (2) according to the number of claws (3) on the self-centering chuck (6). The inner ends of the hooks (2) are fixedly connected to the base (1), and the outer ends of the hooks (2) are hooked to the outer ends of the claws (3). By adjusting the length of the hooks (2), the claws (3) are hooked tightly, eliminating the radial movement clearance of the claws (3), so that the position of the claws (3) remains unchanged when turning the outer circle of the soft claw (5).

2. The self-centering chuck soft jaw outer diameter correction fixture according to claim 1, characterized in that: The base (1) is a ring structure, and a number of first threaded holes (1-1) are provided on the ring structure in a circumferentially evenly distributed according to the number of claws (3).

3. The self-centering chuck soft jaw outer diameter correction fixture according to claim 2, 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 first 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 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).

4. The self-centering chuck soft jaw outer diameter correction fixture according to claim 2, characterized in that: The hook (2) is composed of a connecting seat (2-4), a second L-shaped hook (2-5), and an adjusting bolt (2-6). The two ends of the connecting seat (2-4) are respectively provided with a second through hole (2-4-1) and a connecting hole (2-4-2). The connecting seat (2-4) is threaded to the first threaded hole (1-1) after passing through the second through hole (2-4-1) with a second screw (7), thus fixing the connecting seat (2-4) to the base (1). The vertical end of the second L-shaped hook (2-5) is provided with a third threaded hole (2-5-1). The adjusting bolt (2-6) passes through the connecting hole (2-4-2) and is threaded to the third threaded hole (2-5-1), thus connecting the second L-shaped hook (2-5) to the connecting seat (2-4). The length of the hook (2) is adjusted by rotating the adjusting bolt (2-6), so that the horizontal section of the second L-shaped hook (2-5) is hooked to the outer end of the claw body (3).

5. A self-centering chuck soft jaw outer diameter correction fixture according to claim 3 or 4, characterized in that: The self-centering chuck (6) has a three-jaw structure, and the hooks (2) are also provided in three corresponding positions.

6. A self-centering chuck soft jaw outer diameter correction fixture according to claim 3 or 4, characterized in that: The self-centering chuck (6) has a four-jaw structure, and four corresponding claws (2) are also provided.

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