CN207043761U - A kind of fixture for being used to process thin-walled ring external diameter - Google Patents

Abstract

This utility model discloses a fixture for machining the outer diameter of thin-walled rings. The fixture includes a fixture body, a pressure plate, and a nut. One end of the fixture body is a main body base, and the other end is a main body mandrel with threads at the end. The pressure plate has a circular hole in its center. The thin-walled ring and the pressure plate are sequentially threaded onto the mandrel of the fixture body. The thin-walled ring is clamped by tightening the nut at the end of the mandrel. Based on the design of the radius of the main body mandrel, the fixture of this utility model can be further used for large-radius and small-radius thin-walled rings, as well as for clamping a single thin-walled ring or clamping multiple thin-walled rings simultaneously. The thin-walled ring and the fixture are in close contact, with uniform force distribution, firm clamping, and resistance to deformation. This fixture is beneficial for machining the outer diameter of thin-walled rings and improves the yield rate of thin-walled rings.

Description

A fixture for machining the outer diameter of thin-walled rings

technical field

The utility model belongs to the technical field of processing equipment for thin-walled ring parts, and in particular relates to a fixture for processing the outer diameter of a thin-walled ring.

Background technique

Thin-walled ring parts have been widely used in various industries because of their light weight, material saving, and compact structure. However, the processing of thin-walled ring parts is a difficult problem in turning and grinding. The reason is that the thin-walled ring parts have poor rigidity and weak strength. On the one hand, they are easily deformed by the clamping force of the clamping tool; Especially the radial cutting force) is prone to vibration and deformation, thus increasing the shape and position error of thin-walled ring parts, low dimensional accuracy, large shape change, poor positional accuracy and surface roughness, and greatly reduced yield.

In order to improve the yield and reduce the difficulty of processing, the patent application CN201020615596.3 discloses a fixture structure for processing large thin-walled parts, by passing the thin-walled ring on the circular boss in the center of the clamp body, and then using However, the clamping plates of this fixture structure are distributed on the circumference of the clamping body. At least two clamping plates are needed to realize the function of clamping the thin-walled ring. Clamping results in uneven overall force, increases the degree of deformation due to clamping force, and greatly reduces machining accuracy. Moreover, the clamp plate blocks the outer circumference of the thin-walled ring, so it is not suitable for processing the outer diameter of the thin-walled ring.

Utility model content

In view of the deficiencies in the prior art, the purpose of the utility model is to provide a fixture for processing the outer diameter of a thin-walled ring. The fixture can clamp a single piece or multiple pieces of thin-walled ring parts at the same time. The surface of the thin-walled ring and the fixture is closely bonded, the force is uniform, the clamping is firm and it is not easy to deform. It is used for processing the outer diameter of the thin-walled ring and is conducive to improving the finished product Rate.

The above-mentioned purpose of the utility model is achieved through the following technical solutions:

A fixture for processing the outer diameter of a thin-walled ring, comprising a fixture main body, a pressing plate and a nut, one end of the fixture main body is a main body base, the other end is a main body mandrel, the end of the mandrel has threads, and the center of the pressing plate has a round hole, The thin-walled ring and the pressure plate are passed through the mandrel of the main body of the fixture in sequence, and the thin-walled ring is clamped by tightening the nut at the end of the mandrel.

According to a specific embodiment of the present utility model, in the fixture for processing the outer diameter of a thin-walled ring, the pressing plate is a plane bearing.

When the number of thin-walled rings is large but the diameter is not large, a plane bearing fixture is used to clamp multiple thin-walled rings at the same time, and the clamps press their end faces for processing, which is conducive to improving processing efficiency.

According to another specific embodiment of the present utility model, the above-mentioned fixture for processing the outer diameter of a thin-walled ring, the main body mandrel includes two steps with different radii, the first step connected to the base of the main body is used to penetrate the thin-walled ring, and is located at the end The second step of the is used to penetrate the platen.

Further, in the above jig for processing the outer diameter of a thin-walled ring, the radius of the first step is larger than that of the second step.

Furthermore, in the above jig for processing the outer diameter of the thin-walled ring, the length of the first step is less than the thickness of the thin-walled ring.

The fixture with two mandrel steps with different radii is mainly suitable for thin-walled rings with large hole diameters, because when the diameter of the thin-walled ring holes is large, if the mandrels are of the same radius, nuts of conventional sizes will not be able to meet the demand. Customized nuts bring the defect that the tooling is too heavy. Therefore, it is more advantageous to design a fixture with two steps. For this kind of fixture, the length of the first step is smaller than the thickness of the thin-walled ring, so as to ensure that the pressing plate can be pressed against the end surface of the thin-walled ring.

The above-mentioned fixture for processing the outer diameter of the thin-walled ring of the utility model, the contact between the main body base of the fixture and the thin-walled ring, and between the thin-walled ring and the pressure plate are all surface-to-surface bonding contacts. Therefore, the forces on each part are balanced, basically eliminating The deformation of the thin-walled ring caused by the clamping force during tightening also reduces the vibration transmission under the action of cutting force (especially radial cutting force), ensuring the dimensional accuracy, shape, position accuracy and surface roughness of the workpiece. And the outer diameter of the thin-walled ring can be fully exposed, which is beneficial to the processing of the outer diameter of the thin-walled ring.

Description of drawings

Fig. 1 is the front view of the clamp for processing the outer diameter of the thin-walled ring in embodiment 1;

Fig. 2 is the axial sectional view of the clamp for processing the outer diameter of the thin-walled ring in embodiment 2;

Among them, 1-fixture main body, 2-press plate, 3-nut, 4-thin-walled ring.

detailed description

The following is only a preferred embodiment of the present utility model, which should not be interpreted as the scope of the above-mentioned theme of the present utility model is limited to the following examples, and each feature of the present utility model can be arbitrarily modified under the condition of no contradiction. Combinations, these all belong to the protection scope of the present utility model.

Example 1

Referring to Fig. 1, the fixture used for processing the outer diameter of thin-walled rings in this embodiment includes a fixture main body 1, a pressure plate 2 and a nut 3, the pressure plate 2 is a plane bearing, one end of the fixture main body 1 is the main body base, and the other end is the main body core Shaft, the end of the mandrel is threaded, and the center of the plane bearing has a round hole. Multiple thin-walled rings and plane bearings are sequentially passed on the mandrel of the main body of the clamp. The ends are fastened to form a grip on the thin-walled ring.

When processing the outer diameter of thin-walled rings, such as turning, one end of the fixture is turned into a step and the other end is turned into a center hole, and the step end is fastened with three claws on the lathe, and the other end is tightened with a dead center. When multiple thin-walled rings are clamped, there will be gaps between the rings after being pressed, so plane bearings are used to make up for the cumulative parallelism difference after multiple pieces are clamped, completely fit and pressed, and eliminate the thin-walled rings under the action of fastening force. deformation.

Example 2

Referring to Fig. 2, the fixture used for processing the outer diameter of a thin-walled ring in this embodiment includes a fixture main body 1, a pressure plate 2 and a nut 3, the center of the pressure plate 2 has a round hole, one end of the fixture main body 1 is the main body base, and the other end is the main body Mandrel, the end of the mandrel is threaded, the mandrel includes two steps with different radii, the first step connected to the base of the main body is used to penetrate the thin-walled ring 4, the second step at the end is used to penetrate the pressure plate 2, the first step The radius of the first step is greater than the second step, and the length of the first step is less than the thickness of the thin-walled ring. The thin-walled ring 4 and the pressure plate 2 are sequentially passed on the mandrel of the main body of the clamp, and then the nut 3 is fastened at the end of the mandrel to clamp the thin-walled ring. The fixture of this embodiment is mainly suitable for thin-walled rings with larger diameters.

The above are only some preferred embodiments of the utility model, which are only illustrative of the utility model, rather than limiting the scope. On the premise of not departing from the design spirit of the present utility model, various modifications and improvements made to the above technical solutions by those skilled in the art shall fall within the scope of protection determined by the claims of the present utility model.

Claims (5)

1. A fixture for processing the outer diameter of a thin-walled ring, characterized in that it includes a fixture main body, a pressing plate and a nut, one end of the fixture main body is a main body base, the other end is a main body mandrel, and the end of the mandrel has threads, and the pressing plate There is a round hole in the center, the thin-walled ring and the pressure plate are sequentially passed through the mandrel of the main body of the fixture, and the thin-walled ring is clamped by tightening the nut at the end of the mandrel. 2 . The jig for machining the outer diameter of thin-walled rings according to claim 1 , wherein the pressing plate is a plane bearing. 3 . 3. The jig for machining the outer diameter of a thin-walled ring according to claim 1, wherein the mandrel of the main body includes two steps with different radii, the first step connected to the base of the main body is used to penetrate the thin-walled ring, and is located at The second step at the end is used to penetrate the platen. 4. The jig for machining the outer diameter of a thin-walled ring according to claim 3, wherein the radius of the first step is larger than that of the second step. 5. The jig for processing the outer diameter of the thin-walled ring according to claim 3 or 4, wherein the length of the first step is smaller than the thickness of the thin-walled ring.