CN115722950A - Piston finish-milling notch clamping device and method - Google Patents

Abstract

The invention discloses a piston finish milling notch clamping device and a method, wherein the piston finish milling notch clamping device comprises a base disc, a jacket seat, an elastic jacket and a positioning pin, the jacket seat is fixedly arranged at the central position of the top surface of the base disc, a pair of first pin holes for the positioning pin to penetrate along the radial direction of the base disc and to be matched with the pin hole of a piston to be milled are symmetrically formed in the jacket seat, the inner diameter of the elastic jacket is matched with the outer diameter of the piston to be milled, the elastic jacket is vertically extruded and inserted into the jacket seat, a pair of second pin holes corresponding to the first pin holes are formed in the elastic jacket seat, and the positioning pin penetrates through the first pin hole and the second pin hole to connect the elastic jacket and the jacket seat together. The invention solves the technical problem of how to stably fasten the piston without damage and accurately, and has the advantages of quick clamping, accurate clamping, capability of effectively ensuring the processing precision and quality and the like.

Description

Piston finish-milling notch clamping device and method

Technical Field

The invention relates to the technical field of clamping devices, in particular to a clamping device and a clamping method for a finish-milling notch of a piston.

Background

Before a milling machine mills a notch on the top end of a piston for a micro aircraft engine, a clamping device is required to be adopted to fasten the piston at a processing position. At present, a multi-jaw chuck is usually adopted to fasten the multi-jaw chuck, obviously, the clamping is time-consuming and low in precision, the fastening force applied to a piston is uneven, the piston is inclined in the milling process, and the situation that the part of the piston contacting with the jaw is deformed or even damaged due to overlarge stress easily occurs, so that the production efficiency is low, the processing precision is low, and the quality is poor.

Disclosure of Invention

In view of the defects in the background art, the invention provides a piston finish milling notch clamping device and a method thereof, which aim to solve the problem of stably fastening a piston without damage and accurately.

In order to solve the technical problem, the invention provides a piston finish-milling notch clamping device which comprises a base disc, a jacket seat, an elastic jacket and a positioning pin, wherein the jacket seat is fixedly arranged at the central position of the top surface of the base disc, a pair of first pin holes which are used for the positioning pin to penetrate along the radial direction of the base disc and are matched with pin holes of a piston to be milled are symmetrically formed in the jacket seat, the inner diameter of the elastic jacket is matched with the outer diameter of the piston to be milled, the elastic jacket is vertically extruded and inserted into the jacket seat, a pair of second pin holes corresponding to the first pin holes are formed in the elastic jacket seat, and the positioning pin penetrates through the first pin holes and the second pin holes to connect the elastic jacket with the jacket seat.

In one embodiment of the invention, a fastening screw arranged along the radial direction of the clamping sleeve seat is in threaded engagement with the clamping sleeve seat, the free end of the screw rod of the fastening screw faces the outer peripheral wall of the elastic clamping sleeve, and in the working state, the free end of the screw rod of the fastening screw abuts against the outer peripheral wall of the elastic clamping sleeve.

In an embodiment of the present invention, the top end of the elastic clamping sleeve is provided with an indicating notch which is located on the same line with the second pin hole.

In one embodiment of the invention, the base plate and the jacket base are integrally formed.

In one embodiment of the invention, the bottom of the base plate is fitted with a pair of orientation keys symmetrically disposed about its center by the cooperation of a bolt and a nut.

The invention also provides a method for finely milling the gap clamping device for the piston, which is carried out in the device for finely milling the gap clamping device for the piston and comprises the following steps:

step S1, pulling out the positioning pin to take down the elastic jacket;

s2, inserting a piston to be milled into the elastic clamping sleeve to enable a pin hole of the piston to be milled to be coaxial with the second pin hole;

s3, pressing and inserting the elastic jacket inserted with the piston to be milled into the jacket seat to enable the first pin hole, the second pin hole and the pin hole of the piston to be milled to be coaxial, and in the pressing and inserting process, the elastic jacket radially inwardly contracts to clamp the piston to be milled;

and S4, a positioning pin penetrates through the first pin hole, the pin hole of the piston to be milled and the second pin hole to fasten the elastic jacket, the jacket seat and the piston to be milled together.

Compared with the prior art, the technical scheme of the invention has the following advantages: the fastening force applied by the jacket seat is transmitted to the piston to be milled in a mode that the elastic jacket coaxially and completely covers the periphery of the piston to be milled, so that the fastening force applied to the piston to be milled is uniform, and the situation that the piston to be milled is deformed or even damaged due to overlarge stress is effectively avoided; and the first pin hole and the second pin hole which are matched with the pin holes of the piston to be milled are correspondingly arranged on the clamping sleeve seat and the elastic clamping sleeve respectively through the positioning pin, so that the clamping is quick and accurate, the piston is stably fastened without damage and accurately, the production efficiency is greatly improved, and the processing precision and quality are ensured.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the present invention in use clamping a piston to be milled;

FIG. 3 is a schematic view showing the construction of an elastic jacket according to the present invention;

FIG. 4 is a schematic view of a piston to be milled;

description reference numbers indicate: 1. the base plate comprises a base plate body 2, a clamping sleeve seat 21, a first pin hole 3, an elastic clamping sleeve 31, a second pin hole 32, an indication notch 4, a positioning pin 5, a fastening screw 6 and an orientation key.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are directions with reference to the drawings only. Therefore, the directional terminology used is for the purpose of describing, but not limiting, the invention, and moreover, like reference numerals designate like elements throughout the embodiments.

Referring to fig. 1, 2, 3 and 4, the piston finish milling gap clamping device includes a base disc 1, a jacket seat 2, an elastic jacket 3 and a positioning pin 4, wherein the jacket seat 2 is fixedly arranged at the center of the top surface of the base disc 1, and is symmetrically provided with a pair of first pin holes 21 for the positioning pin 4 to pass through along the radial direction of the base disc 1 and to be matched with the pin hole of a piston to be milled, the inner diameter of the elastic jacket 3 is matched with the outer diameter of the piston to be milled, the elastic jacket 3 is vertically extruded and inserted into the jacket seat 2 and is provided with a pair of second pin holes 31 corresponding to the first pin holes 21, and the positioning pin 4 passes through the first pin holes 21 and the second pin holes 31 to connect the elastic jacket 3 and the jacket seat 2 together. The positioning pin 4 is matched with the first pin hole 21 and the second pin hole 31 which are correspondingly arranged on the clamping sleeve seat 2 and the elastic clamping sleeve 3 and are matched with the pin holes of the piston to be milled, so that the piston to be milled is inserted into the elastic clamping sleeve 3 during clamping, the positioning pin 4 penetrates through the first pin hole 21, the pin holes of the piston to be milled and the second pin hole 31 to enable the elastic clamping sleeve 3, the clamping sleeve seat 2 and the piston to be milled to be fastened together, the fastening force applied by the clamping sleeve seat 2 is transmitted to the piston to be milled in a mode that the elastic clamping sleeve 3 is coaxially and fully wrapped on the periphery of the piston to be milled, the fastening force applied to the piston to be milled is uniform, the situation that deformation or even damage is caused by overlarge stress is effectively avoided, and the technical effect of stably fastening the piston without damage and accurately is achieved.

The clamp sleeve seat 2 is engaged with a fastening screw 5 arranged along the radial direction of the clamp sleeve seat in a threaded manner, the free end of a screw rod of the fastening screw 5 faces the peripheral wall of the elastic clamp sleeve 3, and when the clamp sleeve seat is in a working state, the free end of the screw rod of the fastening screw 5 is abutted against the peripheral wall of the elastic clamp sleeve 3, so that the fastening reliability is improved.

The top end of the elastic jacket 3 is provided with an indicating notch 32 which is positioned on the same straight line with the second pin hole 31, so that the clamping convenience and efficiency are further improved.

The base plate 1 and the jacket seat 2 are integrally formed, so that the structure is compact, and the strength of the jacket seat 2 is improved.

The bottom of the base plate 1 is provided with a pair of orientation keys 6 symmetrically arranged about the center thereof through the cooperation of bolts and nuts, so that the arrangement improves the convenience and efficiency of mounting the clamping device on a milling machine workbench.

A piston finish milling notch clamping device method is carried out in the piston finish milling notch clamping device, and comprises the following steps:

step S1, pulling out the positioning pin 4 to take down the elastic jacket 3;

step S2, inserting a piston to be milled into the elastic jacket 3 to enable a pin hole of the piston to be milled to be coaxial with the second pin hole 31;

s3, pressing and inserting the elastic jacket 3 inserted with the piston to be milled into the jacket seat 2 to enable the first pin hole 21, the second pin hole 31 and the pin hole of the piston to be milled to be coaxial, and in the pressing and inserting process, the elastic jacket 3 radially inwardly contracts to clamp the piston to be milled;

and S4, penetrating a positioning pin 4 through the first pin hole 21, the pin hole of the piston to be milled and the second pin hole 31 to fasten the elastic jacket 3, the jacket seat 2 and the piston to be milled together. By adopting the method, the technical effect of stably fastening the piston without damage and accurately is realized, the use is convenient, the clamping is rapid and accurate, and the processing precision and quality are ensured.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.

Claims (6)

1. A piston finish-milling notch clamping device is characterized by comprising a base plate, a jacket seat, an elastic jacket and a positioning pin, wherein the jacket seat is fixedly arranged at the central position of the top surface of the base plate, a pair of first pin holes for the positioning pin to radially penetrate along the base plate and to be matched with a pin hole of a piston to be milled are symmetrically formed in the jacket seat, the inner diameter of the elastic jacket is matched with the outer diameter of the piston to be milled, the elastic jacket is vertically extruded and inserted into the jacket seat, a pair of second pin holes corresponding to the first pin holes are formed in the elastic jacket seat, and the positioning pin penetrates through the first pin holes and the second pin holes to connect the elastic jacket and the jacket seat together.

2. The piston finish-milling notch clamping device according to claim 1, wherein a fastening screw arranged along the radial direction of the clamping sleeve seat is in threaded engagement with the clamping sleeve seat, a free end of a screw rod of the fastening screw faces the outer peripheral wall of the elastic clamping sleeve, and in an operating state, the free end of the screw rod of the fastening screw abuts against the outer peripheral wall of the elastic clamping sleeve.

3. The piston finish-milling notch clamping device according to claim 1, wherein an indicating notch which is located on the same line with the second pin hole is formed in the top end of the elastic clamping sleeve.

4. The piston finish-milling notch clamping device according to claim 1, wherein the base disc and the jacket seat are integrally formed.

5. The piston finish-milling notch clamping device according to claim 1, wherein a pair of orientation keys symmetrically arranged about the center of the base plate are installed at the bottom of the base plate through the matching of a bolt and a nut.

6. A method for finish-milling a gap clamping device for a piston, which is performed in the piston finish-milling gap clamping device according to any one of claims 1 to 5, comprising the steps of:

step S1, pulling out the positioning pin to take down the elastic jacket;

s2, inserting a piston to be milled into the elastic clamping sleeve to enable a pin hole of the piston to be milled to be coaxial with the second pin hole;

s3, pressing and inserting the elastic jacket inserted with the piston to be milled into the jacket seat to enable the first pin hole, the second pin hole and the pin hole of the piston to be milled to be coaxial, and in the pressing and inserting process, the elastic jacket radially inwardly contracts to clamp the piston to be milled;

and S4, enabling a positioning pin to penetrate through the first pin hole, the pin hole of the piston to be milled and the second pin hole to fasten the elastic jacket, the jacket seat and the piston to be milled together.

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