Self-centering tool for machining split generator shell
Through the design of self-centering tooling, the workpiece is automatically centered by using a jack to tighten the core shaft, which solves the problems of complex operation and low efficiency in the existing technology and improves the processing efficiency of the split generator shell.
Patent Information
- Application Number
- CN202422884329.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The existing technology requires using a dial to align the center of the inner hole of the workpiece when machining a split generator housing, which is complicated, inefficient, and has poor adaptability.
A self-centering tooling is used, including a base, a support block, a positioning assembly and a jack. The jack is used to tighten the core shaft so that the positioning block contacts the inner surface of the workpiece to achieve automatic centering.
The structure is simple and the operation is convenient, which improves the working efficiency of processing the split generator shell and realizes the purpose of automatic centering.
Smart Images
Figure CN223441757U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a self-centering tool, especially to a self-centering tool for machining split generator shell. BACKGROUND
[0002] It is known that the split generator shell, namely the foreign large-scale synchronous generator shell, adopts the split structure for the convenience of export from China, so that the split structure does not cause the problems of high machining cost and high transportation cost due to the oversized workpiece, and is also beneficial to container transportation; however, in the machining, the existing process scheme needs to punch the table to find the center of the workpiece inner hole, and the adaptability is poor, the operation is complex, and the working efficiency is low, therefore, the self-centering tool for machining split generator shell with convenient operation and automatic centering becomes the basic demand of the technical personnel in the field. SUMMARY
[0003] In order to overcome the deficiencies in the background art, the utility model discloses a self-centering tool for machining split generator shell.
[0004] In order to realize the object of the application, the utility model adopts the following technical scheme:
[0005] A self-centering tool for machining split generator shell, comprising a base, a supporting block and a positioning assembly, the base is arranged as a stepped circular ring seat, a positioning sleeve is fixed on the upper top surface of the base, a plurality of positioning assemblies are uniformly distributed and slidably arranged on the outer circular surface of the first layer step of the upper part of the base, a plurality of supporting blocks are uniformly distributed along the circumferential direction of the upper surface of the second layer step of the base, and the supporting blocks and the positioning assemblies do not interfere with each other; a stepped cylinder with large upper part and small lower part is fixed in the first layer step, a core shaft is slidably arranged in the cylinder, a jack is arranged at the lower part of the core shaft, the core shaft comprises a stepped shaft and a frustum extending in the middle part of the stepped shaft, the lower end diameter of the frustum is larger than the step diameter of the cylinder, and the outer conical surface of the frustum is in contact with the inclined surface of the inner end of the positioning assembly.
[0006] The self-centering tool for machining split generator shell is provided with a plurality of supporting strips in a diverging manner along the outer circular surface of the cylinder, and the outer ends of the supporting strips are fixedly connected with the inner ring surface of the second layer step, respectively.
[0007] The self-centering tool for machining split generator shell, the positioning assembly comprises a positioning block, a jacking rod and a fixed sleeve, the fixed sleeve is arranged as a stepped hollow sleeve, the inner ends are inserted into the first layer step of the upper part of the base, the outer ends are fixed on the outer circular surface of the first layer step of the upper part of the base through bolts, the inner end of the jacking rod is arranged as an inclined surface, the inclination thereof is the same as the taper of the outer conical surface of the frustum, the inner end of the jacking rod is in contact with the outer conical surface of the frustum, and the outer end of the jacking rod is fixed with the positioning block.
[0008] The self-centering tool for machining split generator shell is provided with a plurality of sliding grooves in the circumferential direction above the second layer of steps of the base, the supporting blocks are respectively slid on the plurality of sliding grooves, and are fixed through T-shaped groove bolts on the sliding grooves.
[0009] Due to the adoption of the above technical scheme, the machining self-centering tool for split generator shell has the following beneficial effects:
[0010] The self-centering tool for machining split generator shell has the advantages that the jacks are arranged to upwardly press the mandrel, the outer conical surface of the mandrel pushes the inclined surface at the inner end of the ejector rod, the positioning block at the outer end of the ejector rod is in contact with the inner circular surface of the workpiece, and thus the centering effect of the workpiece is achieved; the self-centering tool has simple structure and convenient operation, and achieves the purpose of automatic centering, and greatly improves the work efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 is a structural schematic view of the utility model.
[0012] Figure 2 is a structural schematic view of the bottom surface of the utility model.
[0013] Figure 3 is a structural schematic view of the internal structure of the utility model.
[0014] Figure 4 is a structural schematic view of the mandrel of the utility model.
[0015] In the figure: 1, base; 2, supporting block; 3, positioning block; 4, ejector rod; 5, fixed sleeve; 6, positioning sleeve; 7, supporting strip; 8, cylinder body; 9, mandrel; 10, jack; 11, stepped shaft; 12, conical table. DETAILED DESCRIPTION
[0016] The utility model can be explained in detail through the following embodiments, and the purpose of the utility model is to protect all technical improvements within the scope of the utility model.
[0017] In combination with the accompanying Figures 1-4The self-centering tool for machining split generator shell comprises a base 1, support blocks 2 and positioning assemblies, the base 1 is arranged as a stepped ring seat, a positioning sleeve 6 is fixed on the upper top surface of the base 1, a plurality of positioning assemblies are uniformly distributed on the outer circumferential surface of the first layer of steps of the base 1 and are slidably arranged, a plurality of support blocks 2 are uniformly distributed along the circumferential direction of the second layer of steps of the base 1 and do not interfere with the positioning assemblies, a large-diameter small-diameter cylindrical barrel 8 is fixed on the inside of the first layer of steps, a mandrel 9 is slidably arranged in the barrel 8, a jack 10 is arranged on the lower part of the mandrel 9, the mandrel 9 comprises a stepped shaft 11 and a conical platform 12 extending from the middle part of the stepped shaft 11, the lower end diameter of the conical platform 12 is larger than the stepped diameter of the barrel 8, the outer conical surface of the conical platform 12 is arranged in contact with the inclined surface of the inner end of the positioning assembly, the positioning assembly comprises a positioning block 3, a top rod 4 and a fixed sleeve 5, the fixed sleeve 5 is arranged as a stepped hollow sleeve, the inner end is inserted into the inside of the first layer of steps of the base 1, the outer end is fixed on the outer circumferential surface of the first layer of steps of the base 1 through bolts, the inner end of the top rod 4 is arranged as an inclined surface, the inclination of the inner end of the top rod 4 is the same as the taper of the outer conical surface of the conical platform 12, the inner end of the top rod 4 is in contact with the outer conical surface of the conical platform 12, and the outer end of the top rod 4 is fixed with the positioning block 3.
[0018] Further, a plurality of support strips 7 are arranged on the outer circumferential surface of the barrel 8 and are divergent, and the outer ends of the support strips 7 are fixedly connected with the inner ring surface of the second layer of steps.
[0019] Further, a plurality of sliding grooves are uniformly distributed along the circumferential direction of the second layer of steps of the base 1, the support blocks 2 are slidably arranged on the sliding grooves and are fixed through T-shaped grooves and bolts on the sliding grooves.
[0020] In the self-centering tool for machining split generator shell, the support blocks 2 are arranged as cylindrical shapes, bolt holes are arranged in the centers of the support blocks 2, the support blocks 2 are fixed on the second layer of steps of the base 1 through T-shaped grooves and bolts in the sliding grooves, the base 1 is fixed on the machine tool workbench through bolts in the screw holes on the third layer of steps, the jack 10 is fixed in the machine tool workbench, the jacking end of the jack 10 is fixed in the recess hole on the lower end surface of the mandrel 9, in use, the split generator shell is placed on the support blocks 2, the jacking end of the jack 10 is extended to jack up the mandrel 9 upwards, when the outer conical surface of the conical platform of the mandrel 9 is in contact with the inclined surface of the inner end of the top rod 4, the plurality of top rods 4 are simultaneously moved outward until the positioning blocks 3 on the outer ends of the top rods 4 are tightly pressed on the inner circumferential surface of the split generator shell, and the stable clamping of the split generator shell is completed.
[0021] The part not described in the utility model is the prior art.
[0022] For the purpose of disclosing the invention of the present application, the embodiments selected in this document are currently considered appropriate, but it should be understood that the present application is intended to include all changes and improvements of the embodiments within the scope of the present concept and application.
Claims
1. A self-centering tool for machining a split generator housing, comprising a base, a support block, and a positioning assembly, characterized by: The base is configured as a stepped annular seat, with a positioning sleeve fixed on the upper top surface of the base, and a plurality of sliding positioning components evenly distributed along the outer circular surface of the first step on the upper part of the base, and a plurality of support blocks evenly distributed along the circumferential direction above the second step of the base, and do not interfere with the positioning components; a stepped cylinder with a larger upper portion and a smaller lower portion is fixed inside the first step, a core shaft which is configured to slide up and down is provided inside the cylinder, a jack is provided at the lower part of the core shaft, the core shaft includes a stepped shaft and a frustum extending in the middle of the stepped shaft, the diameter of the lower end of the frustum is larger than the step diameter of the cylinder, and the outer conical surface of the frustum is provided in contact with the inclined surface of the inner end of the positioning component.
2. The self-centering tool for machining a split generator housing according to claim 1 is characterized by: A plurality of divergent support bars are arranged along the outer circumferential surface of the cylinder, and the outer ends of the support bars are respectively fixedly connected to the inner annular surface of the second step.
3. The self-centering tool for machining a split generator housing according to claim 1 is characterized by: The positioning assembly includes a positioning block, a push rod and a fixed sleeve. The fixed sleeve is configured as a stepped hollow sleeve, the inner end of which is inserted into the inside of the first step on the upper part of the base, and the outer end is fixed to the outer circular surface of the first step on the upper part of the base by bolts. The inner end of the push rod is configured as a slope, the slope of which is the same as the taper of the outer conical surface of the frustum. The inner end of the push rod is in contact with the outer conical surface of the frustum, and a positioning block is fixed to the outer end of the push rod.
4. The self-centering tool for machining a split generator housing according to claim 1 is characterized by: A plurality of slide grooves are evenly distributed in the circumferential direction above the second step of the base. The support blocks slide on the plurality of slide grooves respectively and are fixed by T-slot bolts on the slide grooves.