Finish turning tool capable of repairing main tooth center hole

Abstract

The utility model relates to the technical field of machining, and discloses a finish turning tool capable of repairing a main tooth center hole, which comprises a machine tool spindle, a connecting disc is mounted at one end of the machine tool spindle through a third bolt, and a positioning body is mounted at one end, far away from the machine tool spindle, of the connecting disc through a second bolt. A positioning sleeve is installed at the end, away from the connecting disc, of the positioning body through a first bolt. The inner diameter of the end, away from the positioning body, of the positioning sleeve is matched with the outer diameter of the workpiece body. According to the anti-skidding spring collet chuck, the friction force between the spring collet chuck and a workpiece is increased through the anti-skidding protrusions on the conical surface, it is guaranteed that the workpiece is stably positioned in the clamping process, and the sliding phenomenon is effectively prevented; in the machining process of high rotating speed or large torque, the anti-skid protrusions provide additional friction force, displacement or loosening of a workpiece caused by vibration or centrifugal force in the machining process is prevented, and machining stability is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a finishing tool capable of repairing a central hole of a main gear. Background Art

[0002] In the precision machining of shaft parts, especially the active bevel gears for medium and heavy trucks, the radial runout of the workpiece is an important factor affecting the machining quality of the workpiece. Due to the large size and heavy weight of the workpiece, the radial runout of the shaft diameter is easily caused by machining vibration during the fine turning of the gear blank, thus affecting the accuracy of the subsequent gear cutting process. The traditional clamping method is difficult to ensure the stability of the workpiece under high speed and high torque conditions, and the workpiece is prone to loosening or offset, which in turn affects the machining accuracy. In order to overcome this problem, a clamping device is needed that can enhance the clamping force, improve the positioning accuracy and adapt to different workpiece surface conditions. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a finishing tool for repairing the center hole of a main gear.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A finishing tool for repairing the center hole of a main gear comprises a machine tool spindle, one end of the machine tool spindle is equipped with a connecting plate by means of a third bolt, the end of the connecting plate away from the machine tool spindle is equipped with a positioning body by means of a second bolt, and the end of the positioning body away from the connecting plate is equipped with a positioning sleeve by means of a first bolt; the inner diameter of the end of the positioning sleeve away from the positioning body is matched with the outer diameter of the workpiece body; the positioning sleeve, the positioning body and the connecting plate are all through-arranged, a pull rod is arranged at one end of the machine tool spindle close to the inside of the connecting plate, a spring collet is installed at one end of the pull rod extending to the inside of the connecting plate, and an anti-slip protrusion is arranged on the conical surface of the spring collet.

[0006] As a further solution of the utility model: the end of the spring collet away from the pull rod is matched with the outer wall of the workpiece body through a conical surface.

[0007] As a further solution of the utility model: the end of the pull rod away from the spring collet is connected to the hydraulic cylinder on the machine tool.

[0008] As a further solution of the utility model: the outer diameter of the spring collet is matched with the inner diameter of the connecting disk and the inner diameter of the positioning body.

[0009] As a further solution of the utility model: the pull rod is arranged through the inside of the main shaft of the machine tool.

[0010] The beneficial effects of the utility model are:

[0011] 1. Enhanced clamping force: The anti-slip protrusions on the conical surface increase the friction between the spring collet and the workpiece, ensuring that the workpiece is firmly positioned during the clamping process and effectively preventing sliding.

[0012] 2. Prevent the workpiece from loosening: During high-speed or high-torque processing, the anti-slip protrusions provide additional friction to prevent the workpiece from shifting or loosening due to vibration or centrifugal force during processing, thereby ensuring the stability of processing.

[0013] 3. Improve machining accuracy: Since the workpiece positioning is more stable, the anti-slip protrusion design effectively reduces the radial displacement and improves the machining accuracy of the shaft diameter and face cone during turning, thereby controlling the radial runout within the expected range and meeting the accuracy requirement of 0.01mm.

[0014] 4. Extend the service life of the tooling: The anti-slip protrusion makes the clamping force of the spring collet more evenly distributed when clamping the workpiece, reducing the wear and damage caused by excessive force in local areas, thereby extending the service life of the collet.

[0015] 5. Adapt to various workpiece surface conditions: The anti-slip protrusion design can adapt to workpieces with different surface conditions, and can provide sufficient clamping force under various surface conditions, thereby improving the applicability and versatility of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic structural diagram of a finishing tool for repairing the center hole of a main gear.

[0017] In the figure: 1-workpiece body, 2-positioning sleeve, 3-bolt one, 4-positioning body, 5-spring collet, 6-bolt two, 7-bolt three, 8-connecting plate, 9-pull rod, 10-machine tool spindle. DETAILED DESCRIPTION

[0018] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] Reference Figure 1A finishing tool for repairing the center hole of a main gear comprises a machine tool spindle 10, one end of the machine tool spindle 10 is installed with a connecting plate 8 through a bolt three 7, the end of the connecting plate 8 away from the machine tool spindle 10 is installed with a positioning body 4 through a bolt two 6, and the end of the positioning body 4 away from the connecting plate 8 is installed with a positioning sleeve 2 through a bolt one 3; the inner diameter of the end of the positioning sleeve 2 away from the positioning body 4 is matched with the outer diameter of the workpiece body 1; the positioning sleeve 2, the positioning body 4 and the connecting plate 8 are all through-arranged, and a pull rod 9 is arranged at one end of the machine tool spindle 10 close to the inside of the connecting plate 8, and a spring collet 5 is installed at the end of the pull rod 9 extending to the inside of the connecting plate 8, and the conical surface of the spring collet 5 is provided with an anti-slip protrusion.

[0021] The workpiece body 1 to be processed is sleeved on one end of the positioning sleeve 2, and then the spring collet 5 is pushed into the workpiece body 1 by the pull rod 9. As the spring collet 5 moves, the conical surface of the spring collet 5 and the positioning body 4 gradually work. The conical surface matching structure allows the spring collet 5 to gradually open and closely contact the inner wall of the workpiece body 1 as it continues to move downward, thereby achieving radial clamping of the workpiece body 1. This clamping method can provide a stable clamping force to ensure that the workpiece will not be offset due to vibration or external force during the turning process. After the workpiece body 1 is tightened by the spring collet 5, the machine tool spindle 10 drives the connecting plate 8, the positioning body 4, the positioning sleeve 2 and the workpiece body 1 to rotate together, thereby performing turning processing. During the turning process, the tooling structure can provide a higher positioning accuracy to ensure the axial diameter and face cone processing accuracy of the workpiece.

[0022] The conical surface of the spring collet 5 is provided with anti-skid protrusions, which have the advantages of enhancing the clamping force, preventing loosening, improving processing accuracy, extending the service life of the tooling, and adapting to a variety of workpieces. The anti-skid protrusions can increase the friction between the spring collet 5 and the workpiece body 1, ensure that the workpiece is firmly positioned during the clamping process, and effectively prevent the workpiece from sliding due to rotation or processing force. In the process of high speed or high torque processing, these protrusions provide additional friction to prevent displacement or loosening caused by vibration and centrifugal force, thereby ensuring processing stability. Due to the anti-skid protrusions, the positioning of the workpiece after clamping is more stable, the radial displacement is reduced, the processing accuracy of the shaft diameter and the face cone is improved, and it is helpful to control the radial runout within the expected range. At the same time, the design of the protrusions makes the force during the clamping process evenly distributed, reduces the wear of excessive local force, and extends the service life of the spring collet 5. In addition, the anti-skid protrusions can adapt to workpieces with different surface conditions, ensure that sufficient clamping force can be provided in a variety of situations, and improve the applicability and versatility of the tooling. These advantages make the spring collet chuck 5 perform well in high-precision processing scenarios, especially in processing situations that require strict tolerance control.

[0023] After the machining of the shaft diameter and the face cone is completed, the pull rod 9 can be further adjusted to loosen the clamping force of the spring collet 5 on the workpiece, so that the workpiece remains loose on the positioning sleeve 2. At this time, the center hole of the front end face of the workpiece is corrected for the second time using a center drill to ensure the concentricity and straightness of the center hole. The repair of the center hole can effectively reduce the radial runout error of the shaft diameter that may occur in the previous subsequent machining process of the workpiece, thereby controlling the shaft diameter runout of the workpiece within 0.01mm.

[0024] The use of this fixture during the entire processing process can stably clamp the workpiece and avoid the problem of jumping during the processing. At the same time, by correcting the center hole twice, the final processing accuracy of the workpiece and the positioning accuracy of the gears in subsequent processes are ensured. This structure of fixture is particularly suitable for processing large-sized and heavy-weight gear parts, and effectively improves the quality and accuracy of the processing of active bevel gears for medium and heavy trucks.

[0025] As a preferred embodiment of the utility model, one end of the spring collet 5 away from the pull rod 9 is matched with the outer wall of the workpiece body 1 through a conical surface.

[0026] As a preferred embodiment of the utility model, one end of the pull rod 9 away from the spring collet 5 is connected to the hydraulic cylinder on the machine tool.

[0027] As a preferred embodiment of the present utility model, the outer diameter of the spring collet 5 is matched with the inner diameter of the connecting disk 8 and the inner diameter of the positioning body 4 .

[0028] As a preferred embodiment of the present invention, the pull rod 9 is arranged through the inside of the machine tool spindle 10 .

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A finishing tool for repairing the center hole of a main gear, comprising a machine tool spindle (10), characterized in that: One end of the machine tool spindle (10) is mounted with a connecting plate (8) via a third bolt (7); an end of the connecting plate (8) away from the machine tool spindle (10) is mounted with a positioning body (4) via a second bolt (6); and an end of the positioning body (4) away from the connecting plate (8) is mounted with a positioning sleeve (2) via a first bolt (3); The inner diameter of one end of the positioning sleeve (2) away from the positioning body (4) is adapted to the outer diameter of the workpiece body (1); The positioning sleeve (2), the positioning body (4) and the connecting disk (8) are all arranged in a through manner. A pull rod (9) is arranged at one end of the machine tool spindle (10) close to the inside of the connecting disk (8). A spring collet (5) is installed at one end of the pull rod (9) extending to the inside of the connecting disk (8). The conical surface of the spring collet (5) is provided with an anti-slip protrusion.

2. A finishing tool for repairing the center hole of a main gear according to claim 1, characterized in that: One end of the spring collet (5) away from the pull rod (9) is matched with the outer wall of the workpiece body (1) via a conical surface.

3. A finishing tool for repairing the center hole of a main gear according to claim 2, characterized in that: One end of the pull rod (9) away from the spring collet (5) is connected to a hydraulic cylinder on the machine tool.

4. The finishing tool for repairing the center hole of the main gear according to claim 3, characterized in that: The outer diameter of the spring collet (5) matches the inner diameter of the connecting disk (8) and the inner diameter of the positioning body (4).

5. The finishing tool for repairing the center hole of the main gear according to claim 4, characterized in that: The pull rod (9) is arranged to penetrate the interior of the machine tool spindle (10).

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