CN213794270U

CN213794270U - Special centre for piston machining

Info

Publication number: CN213794270U
Application number: CN202021058598.7U
Authority: CN
Inventors: 徐传民; 祝文明
Original assignee: Shandong Zhenting Jinggong Piston Co ltd
Current assignee: Shandong Zhenting Jinggong Piston Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-07-27
Anticipated expiration: 2030-06-10

Abstract

The utility model provides a special top of piston processing, top include top overcoat, set up in the tip at top overcoat top, the inside bearing of top overcoat, its characterized in that: the bearing is 3 single-row angular contact spherical bearings, the bearings are sequentially sleeved on the mandrel, a fastening bolt is arranged at the front end of the mandrel, the mandrel extends out of the tail of the top outer sleeve, the tail of the top outer sleeve is provided with a top outer sleeve rear plug, the tail of the mandrel is connected with a flange, through holes are uniformly distributed in the flange, and bolts are arranged in the through holes. The utility model discloses but the axiality of quick adjustment and lathe main shaft.

Description

Special centre for piston machining

Technical Field

The utility model belongs to the technical field of the piston processing, more specifically says, in particular to special top of piston processing.

Background

In a piston processing production line, a tip is required in an annular groove process and a fine outer process, the sizes of the annular groove and the fine outer process are strict, the tolerance range is small, the precision requirement of form and position tolerance is high, and the qualification and the stability of the size are difficult to guarantee if the quality of the tip is poor. In addition, when a product is replaced, the tailstock of the machine tool needs to be moved, the concentricity of the center and the main shaft of the machine tool changes after the center is moved, correction is needed, the re-correction difficulty of the center is high, and the correction process takes time.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a piston processing is special top, but the axiality of quick adjustment and lathe main shaft.

The utility model adopts the technical proposal that: the utility model provides a special top of piston processing, top includes top overcoat, sets up in the tip at top overcoat top, the inside bearing of top overcoat, the bearing is 3 single-row angular contact spherical bearing, the bearing cup joints in proper order at the dabber, the dabber front end sets up fastening bolt, the dabber stretches out from top overcoat afterbody, and top overcoat afterbody is provided with stifled behind the top overcoat, dabber afterbody connection flange, the equipartition through-hole on the flange is provided with the bolt fastening on the tailstock in the through-hole.

Further, the tip material is provided as an alloy material.

Furthermore, the screw rod of the fastening bolt extends into the screw hole of the mandrel, the screw cap of the fastening bolt extends to the bearing, and a pressure pad is arranged at the contact position of the fastening bolt, the mandrel and the bearing.

Furthermore, a sealing ring is arranged at the contact position of the rear plug of the center outer sleeve and the mandrel.

The utility model has the advantages as follows:

(1) the tip of the tip is made of alloy material, so that the wear resistance is good;

(2) 3 single-row angular contact spherical bearings are arranged in the center sleeve, and in operation, the bearing clearance is reduced by the load from the tip part, so that the center cannot swing due to the clearance. When the single-row angular contact ball bearing bears axial and radial loads, the limit rotating speed is high, the friction torque is small, the single-row angular contact ball bearing can bear the radial and axial loads at the same time, the rotating precision is high, and the noise is low.

(3) In the machining process, the center can automatically adjust the bearing gap due to stress, so that the machining size is good in stability and accurate.

(4) The front end of the bearing is provided with a bolt and a washer which are fixed on the inner sleeve of the bearing, so that the bearing can not be separated.

(5) And a rear sealing ring at the back of the bearing prevents water and sundries from entering the tip sleeve.

(6) The connecting disc at the rear end of the center is convenient for adjusting the coaxiality of the connecting disc and the main shaft of the machine tool.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view in the direction of fig. 1A-a.

Fig. 3 is a schematic view of the structure of the receiving plate of the present invention.

Fig. 4 is a schematic view of the usage state of the present invention.

Fig. 5 is a schematic view of the origin point structure.

Fig. 6 is a schematic view of the internal structure of the live center.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1-top jacket, 2-tip, 3-bearing, 4-mandrel, 5-fastening bolt, 6-top jacket rear plug, 7-flange, 8-pressure pad, 9-sealing ring, 10-through hole.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples.

Example 1:

a special centre for processing a piston comprises a centre outer sleeve 1, a tip part 2 arranged at the top of the centre outer sleeve and a bearing 3 arranged inside the centre outer sleeve, wherein the tip part 2 is made of alloy materials, the bearing 3 is 3 single-row angular contact spherical bearings, the bearing 3 is sequentially sleeved on a mandrel 4, a fastening bolt 5 is arranged at the front end of the mandrel 4, a screw rod of the fastening bolt 5 extends into a screw hole of the mandrel, a nut of the fastening bolt 5 extends to the bearing 3, and a pressure pad 8 is arranged at the contact part of the fastening bolt 5 and the mandrel 4 and the bearing 3; the core shaft 4 extends out of the tail part of the center outer sleeve 1, the tail part of the center outer sleeve 1 is provided with a center outer sleeve rear plug 6, and a sealing ring 9 is arranged at the contact part of the center outer sleeve rear plug 6 and the core shaft 4; the tail of the mandrel 4 is connected with a flange 7, through holes 10 are uniformly distributed on the flange 7, and the tip is fixed on the tailstock through the through holes 10 through bolts.

During the use, will the utility model discloses install on the tailstock sleeve, the dabber rear end is no longer ordinary centrum, but the rear end has the flange, and the flange has the phi 7.5's of 3 equipartitions through-hole. The tip is integrally fixed on the front end face of the tailstock sleeve by 3 bolts of M6 through 3 through holes of the flange. When the concentricity of the center and the machine tool spindle is adjusted, 3 bolts at the flange are slightly loosened, so that the center can move on the end face of the tailstock sleeve, the center abuts against the piston center hole, the machine tool spindle is started to rotate at a high speed, and the center can be automatically concentric with the machine tool spindle under the driving of the piston center hole.

Claims

1. The utility model provides a special top of piston processing, top includes top overcoat, sets up in the tip at top overcoat top, the inside bearing of top overcoat, its characterized in that: the bearing is 3 single-row angular contact spherical bearings, the bearings are sequentially sleeved on the mandrel, a fastening bolt is arranged at the front end of the mandrel, the mandrel extends out of the tail of the top outer sleeve, the tail of the top outer sleeve is provided with a top outer sleeve rear plug, the tail of the mandrel is connected with a flange, through holes are uniformly distributed in the flange, and bolts are arranged in the through holes.

2. The special center for piston processing according to claim 1, wherein: the tip material is arranged to be an alloy material.

3. The special center for piston processing according to claim 1, wherein: the screw rod of the fastening bolt extends into the screw hole of the mandrel, the screw cap of the fastening bolt extends to the bearing, and a pressure pad is arranged at the contact position of the fastening bolt, the mandrel and the bearing.

4. The special center for piston processing according to claim 1, wherein: and a sealing ring is arranged at the contact position of the rear plug of the tip outer sleeve and the mandrel.