An inner spline expanding mandrel loading auxiliary tool

Abstract

The utility model discloses a kind of inner spline expansion core loading auxiliary tool, it is characterized by: including bottom plate, expansion core positioning seat, support table, wherein the expansion core positioning seat is set on the bottom plate, the support table has inner cavity, the support table cover is set in the upper of the expansion core positioning seat, the lower part of the support table has mounting flange, the mounting flange is installed on the bottom plate by multiple adjusting bolts, the expansion core positioning seat is floatingly provided with positioning table, the top surface of the positioning table has positioning hole, the upper end of the support table has support plane.The utility model has beneficial effects, tool structure is simple, manufacturing cost is low, improve the assembly efficiency of inner spline expansion core and workpiece, reduce assembly difficulty.

Description

Technical Field

[0001] This utility model relates to the field of fixtures, specifically to an auxiliary tooling for inserting an internal spline expansion core. Background Technology

[0002] An internal spline expansion mandrel is a positioning fixture used for turning workpieces with internal splines. The utility model patent with publication number CN222385928U discloses an internal spline expansion mandrel shaft structure, including an expansion mandrel shaft, an internal spline expansion sleeve, and a fastening spring. The internal spline expansion sleeve is composed of three equally divided arc-shaped parts. Limiting grooves are located on both sides of the internal spline expansion sleeve near the end along the axial direction. The fastening spring is annularly sleeved within the limiting grooves, causing the three arc-shaped parts of the internal spline expansion sleeve to move closer to the shaft center. The internal spline expansion sleeve is sleeved on the expansion mandrel shaft, which has a tapered portion that contacts the inner tapered surface of the internal spline expansion sleeve. A clamping nut is located at the small end of the expansion mandrel shaft near the tapered portion. Tightening the clamping nut causes the internal spline expansion sleeve to expand radially. An elastic clamping mechanism is located at the large end of the expansion mandrel shaft near the tapered portion. The positioning gap of the internal spline gear can be eliminated by the expandable internal spline sleeve, and the mandrel and the internal spline gear are in surface contact, resulting in high clamping stability. Positioning is convenient by tightening the bolts to expand.

[0003] However, the internal spline expansion core structure needs to be assembled with the internal spline expansion core before the workpiece is clamped onto the lathe. Therefore, it is necessary to design an auxiliary tooling for inserting the internal spline expansion core. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this utility model provides an auxiliary tooling for installing internal spline expansion cores. It has a simple structure, is suitable for assembling internal spline expansion cores with workpieces, and improves the efficiency of installing internal spline expansion cores into workpieces.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An auxiliary tooling for inserting an internal spline expansion core is characterized by comprising a base plate, an expansion core positioning seat, and a support platform. The expansion core positioning seat is disposed on the base plate, the support platform has an internal cavity, the support platform covers the expansion core positioning seat, the lower part of the support platform has a mounting flange, the mounting flange is mounted on the base plate by a plurality of adjusting bolts, a positioning platform is floatingly disposed on the expansion core positioning seat, the top surface of the positioning platform has a positioning hole, and the upper end of the support platform has a support plane.

[0007] Furthermore, the expansion core positioning seat has a vertical central shaft hole, the positioning platform is vertically movably disposed in the central shaft hole, and a spring is provided between the bottom surface of the positioning platform and the base plate.

[0008] Furthermore, the side wall of the expansion core positioning seat has a vertically arranged waist-shaped hole, and the side wall of the positioning platform is provided with a limiting screw, which is movably limited in the waist-shaped hole.

[0009] The advantages of this utility model include: simple tooling structure, low manufacturing cost, improved assembly efficiency of internal spline expansion core and workpiece, and reduced assembly difficulty. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a cross-sectional structural diagram of the present invention. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0013] One such Figure 1-2 The internal spline expansion core installation auxiliary fixture shown includes a base plate 1, an expansion core positioning seat 2, and a support platform 3. The expansion core positioning seat 2 is mounted on the base plate 1 and connected by screws. The support platform 3 has an internal cavity and covers the expansion core positioning seat 2. The lower part of the support platform 3 has a mounting flange, which is mounted on the base plate 1 by multiple adjusting bolts 4. The adjusting bolts 4 can adjust the installation height of the support platform 3 while keeping the top surface of the support platform 3 level. A positioning table 5 is floating on the expansion core positioning seat 2. The top surface of the positioning table 5 has a positioning hole 6, which is usually a square hole or a hexagonal hole, and the actual selection corresponds to the shape of the end of the internal spline expansion core. The upper end of the support platform 3 has a supporting plane 7 for supporting and positioning the end face of the workpiece.

[0014] The expansion core positioning seat 2 has a vertical central shaft hole, and the positioning table 5 is vertically movably set in the central shaft hole. A spring 8 is set between the bottom surface of the positioning table 5 and the base plate 1, so that the positioning table 5 can float up and down.

[0015] To prevent the positioning platform 5 from detaching from the expansion core positioning seat 2 and to prevent the positioning platform 5 from rotating relative to the expansion core positioning seat 2, the expansion core positioning seat 2 in this embodiment has a vertically arranged waist-shaped hole 9 on its side wall. The positioning platform 5 is provided with a limit screw 10 on its side wall, and the limit screw 10 is movably limited in the waist-shaped hole 9. The support platform 3 in this embodiment has an operation window on its side wall, which facilitates the assembly of the positioning platform 5 and also facilitates observation of the internal spline expansion core being installed into the positioning hole of the positioning platform 5.

[0016] The working principle of this embodiment is as follows: First, the workpiece with internal splines is placed on the support plane 7 of the support table 3. Then, the internal spline expansion core is inserted from the cavity of the support table 3 into the positioning table 5, so that the end of the expansion core shaft of the internal spline expansion core mates with the positioning hole, which is usually a square hole or a hexagonal hole. Then, the workpiece is rotated so that the internal spline teeth on the workpiece are roughly aligned with the internal spline teeth of the expansion core. Then, the clamping nut at the upper end of the internal spline expansion core is rotated to make the internal spline expansion sleeve radially expand, thereby tightening the workpiece. Finally, the internal spline expansion core and the workpiece are taken out together and clamped on the lathe for turning.

[0017] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An auxiliary tooling for inserting an internal spline expansion core, characterized in that: The device includes a base plate (1), an expansion core positioning seat (2), and a support platform (3). The expansion core positioning seat (2) is disposed on the base plate (1). The support platform (3) has an inner cavity and covers the expansion core positioning seat (2). The lower part of the support platform (3) has a mounting flange, which is mounted on the base plate (1) by multiple adjusting bolts (4). A positioning platform (5) is floating on the expansion core positioning seat (2). The top surface of the positioning platform (5) has a positioning hole (6). The upper end of the support platform (3) has a support plane (7).

2. The auxiliary tooling for inserting an internal spline expansion core according to claim 1, characterized in that: The expansion core positioning seat (2) has a vertical central shaft hole, and the positioning platform (5) is vertically movably arranged in the central shaft hole. A spring (8) is provided between the bottom surface of the positioning platform (5) and the base plate (1).

3. The auxiliary tooling for inserting an internal spline expansion core according to claim 2, characterized in that: The expansion core positioning seat (2) has a vertically arranged waist-shaped hole (9) on its side wall, and the positioning platform (5) is provided with a limiting screw (10) on its side wall. The limiting screw (10) is movably limited in the waist-shaped hole (9).

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