Roundness repairing jig for rotary part

Abstract

The utility model relates to the technical field of machinery manufacturing industry, in particular to a roundness repairing jig for a rotary part, which comprises a cutter bar, a gland and a deep groove ball bearing, the rear end of the cutter bar is clamped on the cutter handle, the cutter handle is connected with a spindle of a machine tool, the front end of the cutter handle is connected with the deep groove ball bearing in a close fit mode, the deep groove ball bearing is pressed and limited through the gland, the rotary part rotates through the spindle of the machine tool and rolls relative to an outer ring of the deep groove ball bearing, and roundness repairing is achieved. The roundness repairing device is suitable for roundness repairing when the rotary part is deformed and sunken, and the universality is high; the cutter bar and the gland can be machined by a common lathe, so that the manufacturing cost is low; the bearing can be replaced under the condition that a jig is not replaced, operation and use are easy and stable, the number of clamps is reduced, and manufacturing cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, and particularly relates to a roundness repair fixture for a rotating part. Background Technique

[0002] The engine occupies an important position in the mechanical manufacturing industry. The rotating parts in the engine account for the highest proportion. During the processing and manufacturing of rotating parts, it is inevitable that the roundness exceeds the tolerance due to deformation, which is a major technical problem in the field of mechanical processing. The manufacturing cost and economic losses caused by the scrapping of parts due to such problems are huge and need to be solved urgently. Content of the Utility Model

[0003] In order to solve the above technical problems, the utility model discloses a roundness repair fixture for a rotating part.

[0004] The specific technical solution of the utility model is as follows:

[0005] A roundness repair fixture for a rotating part, comprising a tool shank, a gland and a deep groove ball bearing; the rear end of the tool shank is clamped on the tool holder, the tool holder is connected to the main shaft of the machine tool, the front end is tightly and cooperatively connected with the deep groove ball bearing, and the deep groove ball bearing is pressed and limited by the gland. The rotating part rotates through the main shaft of the machine tool and rolls relatively with the outer ring of the deep groove ball bearing to achieve roundness repair.

[0006] The front end of the tool holder is machined into a stepped shaft, and an installation hole is opened at the center of the stepped shaft; the center of the gland is provided with a convex disk, and a countersunk screw hole is opened at the center of the convex disk; an inner ring is opened at the center of the deep groove ball bearing; the stepped shaft of the tool shank and the convex disk of the gland are respectively tightly and cooperatively connected to both ends of the inner ring, and the gland, the deep groove ball bearing and the tool shank are connected by screwing a screw into the countersunk screw hole, passing through the inner ring and screwing into the installation hole.

[0007] The screw is an inner hexagon socket head cap screw.

[0008] The roundness repair fixture is used for the roundness repair of all rotating parts.

[0009] The outer wall of the rotating part contacts the probe of the dial indicator.

[0010] Compared with the prior art, the utility model has the following beneficial technical effects:

[0011] The utility model is applicable to the roundness repair when the rotating part is deformed and sunken, and has strong versatility; the tool shank and the gland can be processed by an ordinary lathe, and the manufacturing cost is low; the bearing can be replaced without replacing the fixture, and the operation and use are simple and stable, reducing the inventory of fixtures and saving the manufacturing cost. Description of the Drawings

[0012] Figure 1Schematic diagram of the overall structure of the fixture of the present utility model;

[0013] Figure 2 Schematic diagram of the structure of the tool shank of the present utility model;

[0014] Figure 3 Schematic diagram of the structure of the gland of the present utility model;

[0015] Figure 4 Cross-sectional view of the gland of the present utility model;

[0016] Figure 5 Schematic diagram of the structure of the deep groove ball bearing of the present utility model;

[0017] In the figure, 1 is the tool shank; 11 is the stepped shaft; 12 is the mounting hole; 2 is the gland; 21 is the convex disc; 22 is the countersunk screw hole; 3 is the deep groove ball bearing; 31 is the inner ring; 4 is the screw. Specific embodiments

[0018] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present utility model is not limited to the accompanying drawings and specific embodiments only.

[0019] Figure 1 Schematic diagram of the overall structure of the fixture of the present utility model, Figure 2 Schematic diagram of the structure of the tool shank of the present utility model, Figure 3 Schematic diagram of the structure of the gland of the present utility model, Figure 4 Cross-sectional view of the gland of the present utility model, Figure 5 Schematic diagram of the structure of the deep groove ball bearing of the present utility model, as shown in the figure:

[0020] The roundness repair fixture for rotary parts of the present utility model is applicable to the roundness repair of all rotary parts. The fixture includes a tool shank 1, a gland 2 and a deep groove ball bearing 3; the rear end of the tool shank 1 is clamped on the tool holder, the tool holder is connected to the main shaft of the machine tool, the front end is tightly and cooperatively connected with the deep groove ball bearing 3, and the deep groove ball bearing 3 is pressed and limited by the gland 2. The rotary part rotates through the main shaft of the machine tool and rolls relatively with the outer ring of the deep groove ball bearing 3 to achieve roundness repair, and the outer wall of the rotary part contacts the probe of the dial indicator.

[0021] The front end of the tool holder is machined into a stepped shaft 11, and a mounting hole 12 is opened at the center of the stepped shaft 11; the center of the gland 2 is provided with a convex disc 21, and a countersunk screw hole 22 is opened at the center of the convex disc 21; the center of the deep groove ball bearing 3 is provided with an inner ring 31; the stepped shaft 11 of the tool shank 1 and the convex disc 21 of the gland 2 are respectively tightly and cooperatively connected to both ends of the inner ring 31, and the inner hexagon socket head screw 4 is screwed into the countersunk screw hole 22, passes through the inner ring 31, and is screwed into the mounting hole 12 to realize the connection of the gland 2, the deep groove ball bearing 3 and the tool shank 1.

[0022] Example 1: The roundness requirement of a certain rotating part is 0.1. Due to a collision, the depression deformation has caused the actual roundness to be 0.4. Now, it is necessary to repair the depressed deformation area to make the roundness of the part reach 0.1. The operation is as follows:

[0023] (1) First, clamp the tool shank 1 on the BT50 tool holder, and install the tool holder on the spindle of the machine tool equipment; the stepped shaft 11 of the tool shank 1 and the convex disk 21 of the gland 2 are respectively tightly fitted and connected to both ends of the inner ring 31, and the socket head cap screw 4 is screwed into the counterbore screw hole 22, passes through the inner ring 31, and is screwed into the mounting hole 12 to realize the pressing and limiting function of the gland on the inner ring of the deep groove ball bearing 3;

[0024] (2) Then, by changing the position of the spindle, make the outer ring of the deep groove ball bearing 3 fit with the depression of the rotating part, and radially move and offset 0.1 towards the depression;

[0025] (3) Next, rotate the workbench around the center of the rotating part to make the part and the outer ring of the deep groove ball bearing 3 roll relatively for roundness repair operation, but the inner ring of the deep groove ball bearing 3 and the tool shank 1 do not roll relatively;

[0026] (4) Contact the probe of the dial indicator with the outer wall of the rotating part, zero it. When the dial indicator reading is within 0.1±0.05, the part is qualified; otherwise, move the spindle to adjust the offset between the deep groove ball bearing 3 and the rotating part, and repeat step 2 until the dial indicator reading is qualified.

Claims

1. A roundness repair jig for rotating parts, characterized in that: The invention comprises a tool bar (1), a pressure cover (2) and a deep groove ball bearing (3); the rear end of the tool bar (1) is clamped on a tool handle, the tool handle is connected to the main shaft of a machine tool, and the front end is tightly connected to the deep groove ball bearing (3); the deep groove ball bearing (3) is pressed and limited by the pressure cover (2); the rotating part is rotated by the main shaft of the machine tool, and relatively rolls with the outer ring of the deep groove ball bearing (3) to achieve roundness repair.

2. The roundness repairing jig for rotating parts according to claim 1, characterized in that: The front end of the tool handle is processed into a stepped shaft (11), and a mounting hole (12) is provided at the center of the stepped shaft (11); the center of the pressure cover (2) is provided with a convex disk (21), and a countersunk screw hole (22) is provided at the center of the convex disk (21); the center of the deep groove ball bearing (3) is provided with an inner ring (31); the stepped shaft (11) of the tool rod (1) and the convex disk (21) of the pressure cover (2) are respectively tightly matched and connected at both ends of the inner ring (31), and a screw (4) is screwed into the countersunk screw hole (22), passed through the inner ring (31), and screwed into the mounting hole (12), so as to realize the connection between the pressure cover (2), the deep groove ball bearing (3) and the tool rod (1).

3. The roundness repairing jig for rotating parts according to claim 2, characterized in that: The screw (4) is a hexagon socket head screw (4).

4. The roundness repairing jig for rotating parts according to claim 1, characterized in that: The roundness repairing jig is suitable for the roundness repairing of all rotating parts.

5. The roundness repairing jig for rotating parts according to claim 1, characterized in that: The outer wall of the rotating part contacts the probe of the dial indicator.

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