CN202984452U

CN202984452U - Spinning die for copper pipe

Info

Publication number: CN202984452U
Application number: CN 201220675491
Authority: CN
Inventors: 刘丰华
Original assignee: ZHONGSHAN TIANYI COPPER CO Ltd
Current assignee: ZHONGSHAN TIANYI COPPER CO Ltd
Priority date: 2012-12-10
Filing date: 2012-12-10
Publication date: 2013-06-12
Anticipated expiration: 2022-12-10

Abstract

The utility model relates to a spinning die for a copper pipe. The spinning die is characterized by comprising a first spinning ring, a second spinning ring and six roll balls; a first annular groove is formed on the first spinning ring; the cross section of the first annular groove is in the shape of an arc; a second annular groove is formed on the second spinning ring; the cross section of the second annular groove is in the shape of an arc; the second annular groove corresponds to the first annular groove, and the second annular groove and the first annular groove are matched mutually; the six roll balls are arranged in a slide track groove in a rolling manner, and the slide track groove is formed by the first annular groove and the second annular groove; and the space that is formed by the six roll balls in an encircling manner is spinning space. The spinning die has the advantages as follows: the spinning space is large, the trace on the outer surface of the copper pipe is shallow, the trace distance is small, no residual oil is left on the surface of the copper pipe basically, residual oil on the surface of the copper pipe can be volatilized successfully, and the oxidation of the copper pipe can be reduced effectively.

Description

The copper pipe spinning mold

Technical field

The utility model relates to a kind of copper pipe spinning mold.

Background technology

Existing copper pipe spinning mold as shown in Figure 1, 2, it comprises the first spinning ring (1), the second spinning ring (3) and five balls (2), the spinning space (21) that five balls (2) surround is smaller, and the first spinning ring (1), the second spinning ring (3) and five balls (2) are made by carbide alloy.During work, under the drive of high-frequency electric machines, 30000 rev/mins of turn ups, five balls (2) in the first spinning ring (1) and the second spinning ring (3) are around copper tube rolling, copper tube inner lining has the screw thread core print, and tubing advances under the pulling force traction, thereby realizes the mould pressing process; First and second spinning ring and five balls are easy to wear when high speed spinning, easily cause the inner screw thread copper pipe dimensional discrepancy, produce defective work, and invar ball surface cracky, therefore very high to the requirement of lubricating oil again, need regularly quantitatively to change; Due to the wearing and tearing of five balls, make the regular aperture seal of inner screw thread copper pipe surface generation, produce defective work; Simultaneously, because the space that five balls (2) surround is smaller, it directly rolls copper pipe, easily be stained with trickle iron filings between internal thread appearance spinning trace distance, iron filings can cause riffled tube annealing packing rear oxidation, lubricating oil can stick to the inner screw thread copper pipe surface, causes riffled tube annealing packing rear oxidation.

Summary of the invention

The purpose of this utility model is overcome the deficiencies in the prior art and provide a kind of spinning space large, the vestige of copper pipe outer surface is shallow and the trace distance is little, copper pipe surface there is no Residual oil, and after annealing, the Residual oil of copper pipe surface can volatilize smoothly, can effectively reduce the copper pipe spinning mold of copper pipe generation oxidation.

In order to achieve the above object, the utility model is achieved in that it is a kind of copper pipe spinning mold, is characterized in that comprising:

The first spinning ring is provided with the first cannelure on described the first spinning ring, the section of described the first cannelure is curved;

The second spinning ring is provided with the second cannelure on described the second spinning ring, the section of described the second cannelure is curved, and the second cannelure is corresponding with the first cannelure and work in coordination; With six balls, described six balls are rotatable to be located in the sliding-rail groove that the first cannelure and the second cannelure form, and the space that six balls surround is the spinning space.

Described the first spinning ring, the second spinning ring and six balls are made by silicon nitride material.

The utility model advantage compared with prior art is: because the spinning space is large, the shallow and trace of the vestige of copper pipe outer surface is apart from little, and copper pipe surface there is no Residual oil, and after annealing, the Residual oil of copper pipe surface can volatilize smoothly, can effectively reduce copper pipe generation oxidation; Separately, due to the nonabradable characteristic of silicon nitride and have certain lubricity, can guarantee that the change in size of inner screw thread copper pipe is very little, thereby improve lumber recovery and the production efficiency of inner screw thread copper pipe, during use, external membrane oil is less demanding, can largely the adventitia oil viscosity be reduced.Using viscosity 110 left and right that need to drop to be used by silicon nitride by original carbide alloy needs viscosity in 30 left and right.

Description of drawings

Fig. 1 is the stereogram of prior art;

Fig. 2 is the top view that removes in Fig. 1 after the first spinning ring;

Fig. 3 is stereogram of the present utility model;

Fig. 4 is front view of the present utility model;

Fig. 5 is the A-A cutaway view of Fig. 4;

Fig. 6 is the top view after the utility model removes the first spinning ring.

The specific embodiment

The below describes embodiment of the present utility model in detail, and the example of described embodiment is shown in the drawings, in figure from start to finish same or similar label represent same or similar element or the element with identical or similar functions.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the utility model, and can not be interpreted as restriction of the present utility model.

In description of the present utility model, term " first " reaches " second " and only is used for describing purpose, and can not be interpreted as indication or hint relative importance.

As shown in Fig. 3 to 6, it is a kind of copper pipe spinning mold, comprises the first spinning ring 1, the second spinning ring 3 and six balls 2; Wherein be provided with the first cannelure 11 on described the first spinning ring 1, the section of described the first cannelure 11 is curved; Be provided with the second cannelure 31 on described the second spinning ring 3, the section of described the second cannelure 31 is curved, and the second cannelure 31 is corresponding with the first cannelure 11 and work in coordination; Described six balls 2 are rotatable to be located in the sliding-rail groove that the first cannelure 11 and the second cannelure 31 form, and the space that six balls 2 surround is spinning space 21.During work, processed copper pipe passes the first spinning ring 1, spinning space 21 and the second spinning ring 3, and high-frequency electric machines drives the copper pipe spinning mold, and six balls 2 are periphery at the first cannelure 11 and the second interior High Rotation Speed of cannelure 31,

At the present embodiment, in order to reduce to avoid the defective work that causes easy to wear because of the copper pipe spinning mold, described the first spinning ring 1, the second spinning ring 3 and six balls 2 are made by silicon nitride material; Silicon nitride, chemical formula are Si3N4, and it is a kind of important structural ceramic material, are a kind of superhard materials, and itself has lubricity, and wear-resistant, is atomic crystal; Anti-oxidant during high temperature, and it can also resist thermal shock, is heated in air more than 1000 ℃, and sharply cooling sharply heating can be not cracked more yet.These characteristics of silicon nitride have just in time made up the some shortcomings of copper pipe processing spinning mold.

Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that do not break away from principle of the present utility model and aim can be carried out multiple variation, modification, replacement and distortion to these embodiment, scope of the present utility model is limited by claim and equivalent thereof.

Claims

1. copper pipe spinning mold is characterized in that comprising:

The first spinning ring (1) is provided with the first cannelure (11) on described the first spinning ring (1), the section of described the first cannelure (11) is curved;

The second spinning ring (3) is provided with the second cannelure (31) on described the second spinning ring (3), the section of described the second cannelure (31) is curved, and the second cannelure (31) is corresponding with the first cannelure (11) and work in coordination; With

Six balls (2), described six balls (2) are rotatable to be located in the sliding-rail groove that the first cannelure (11) and the second cannelure (31) form, and the space that six balls (2) surround is spinning space (21).

2. copper pipe spinning mold according to claim 1 is characterized in that described the first spinning ring (1), the second spinning ring (3) and six balls (2) make by silicon nitride material.