CN202021221U

CN202021221U - Improved moving inner core structure for seamless steel cold drawn die

Info

Publication number: CN202021221U
Application number: CN201120044061XU
Authority: CN
Inventors: 赵健
Original assignee: ZHEJIANG JIANLI CO Ltd
Current assignee: ZHEJIANG JIANLI CO Ltd
Priority date: 2011-02-22
Filing date: 2011-02-22
Publication date: 2011-11-02
Anticipated expiration: 2021-02-22

Abstract

The utility model discloses an improved moving inner core structure for a seamless steel cold drawn die, which comprises a core head body, wherein a screw axially penetrates through the center of the core head body, and two reinforcing gaskets are screwed on the screw and are respectively arranged at the two end parts of the core head body to clamp and fix the core head body on the screw. The core head body is clamped and fixed by the reinforcing gaskets, so that the whole structural strength is increased, and the service life of a moving inner core is prolonged.

Description

A kind of inner core that moves about of cold-drawing seamless tube mould improves structure

Technical field

The utility model belongs to the mould of metal drawing and makes the field, relates in particular to a kind of inner core that moves about of cold-drawing seamless tube mould.

Background technology

The inner core that moves about mainly is to be used for drawing copper pipe, steel pipe, it generally all with pipe drawing-die (claiming external mold, stretching die again) supporting use, floating core head is unfixing in pipe fitting, and the reaction force by with the frictional force of tube wall and pipe fitting distortion the time reaches a poised state, the inner core so title moves about.As shown in Figure 1, the existing inner core that moves about mainly is made of two parts, comprises core print 02 and connecting rod 01, and core print 02 cooperates formation tubing deformed area with the pipe drawing-die, and connecting rod 02 is used for cylinder lever connecting rod, in the tube-drawing process, by pull bar core print is sent into the tubing deformed area; Core print adopts wolfram steel to make, and be characterized in hardness height, wear-resistant and fineness good, but fragility is big, impact resistance is poor, and core print occurs crackle easily or occurs damaged on the corner in inside after being subjected to external impacts, collision; This is to all impacting in the service life of the inner core that moves about and the drawing quality of tubing.

Summary of the invention

Problem to be solved in the utility model is exactly to move about at existing that inner core fragility is big, the shortcoming of impact resistance difference, provide a kind of inner core that moves about of cold-drawing seamless tube mould to improve structure, when the inner core wearability is moved about in assurance, increase its overall construction intensity, improve the service life of the inner core that moves about.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of inner core that moves about of cold-drawing seamless tube mould improves structure, comprise the core print body, it is characterized in that: described core print body central shaft is to installing a screw rod, be connected with two reinforcement pads on the screw rod, two reinforcement pad branches be located at core print body both ends with core print body clamping on screw rod.

Further, adopt close-fitting to be connected between described screw rod and the core print body or be threaded.

Further, the outer wall of described reinforcement pad is provided with ledge structure.

Further, the thickness of described reinforcement pad is 1/3 to 1/2 of core print body thickness.

Further, described core print body adopts G15 tungsten alloy steel to make, and guarantees its original good wearability and hardness.

Further, described reinforcement pad adopts G15 tungsten alloy steel to make.

The beneficial effects of the utility model: adopt reinforcement pad clamping core print body, when the core print body is subjected to external impacts, the reinforcement pad can be born the part impulsive force, reduces the suffered impact dynamics of core print body, improves the overall construction intensity and the shock resistance of core print body.

Description of drawings

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1 is the structural representation of the existing inner core that moves about;

Fig. 2 is the move about structural representation of inner core of the utility model.

The specific embodiment

With reference to Fig. 2, the utility model is that a kind of inner core that moves about of cold-drawing seamless tube mould improves structure, comprise core print body 1, described core print body 1 central shaft is to installing a screw rod 2, be connected with on the screw rod 23, two reinforcement pads of two reinforcement pads be located in 3 minutes core print body 1 both ends with core print body 1 clamping on screw rod 2; Adopt close-fitting to be connected between screw rod 2 and the core print body 1 or be threaded; The outer wall of reinforcement pad 3 is provided with ledge structure; The thickness of reinforcement pad 3 is 1/3 to 1/2 of core print body 1 thickness; Core print body 1 all adopts G15 tungsten alloy steel to make with reinforcement pad 3.Adopt reinforcement pad clamping core print body, when the core print body was subjected to external impacts, the reinforcement pad can be born the part impulsive force, reduced the suffered impact dynamics of core print body with this, and the overall construction intensity and the shock resistance of core print body are improved.

Claims

1. the inner core that moves about of a cold-drawing seamless tube mould improves structure, comprise core print body (1), it is characterized in that: described core print body (1) central shaft is to installing a screw rod (2), be connected with two reinforcement pads (3) on the screw rod (2), two reinforcement pads (3) divide be located at core print body (1) both ends with core print body (1) clamping on screw rod (2).

2. the inner core that moves about of a kind of cold-drawing seamless tube mould according to claim 1 improves structure, it is characterized in that: the employing close-fitting is connected or is threaded between described screw rod (2) and the core print body (1).

3. the inner core that moves about of a kind of cold-drawing seamless tube mould according to claim 1 improves structure, and it is characterized in that: the outer wall of described reinforcement pad (3) is provided with ledge structure.

4. the inner core that moves about of a kind of cold-drawing seamless tube mould according to claim 3 improves structure, and it is characterized in that: the thickness of described reinforcement pad (3) is 1/3 to 1/2 of core print body (1) thickness.

5. the inner core that moves about according to claim 1 or 2 or 3 or 4 described a kind of cold-drawing seamless tube moulds improves structure, it is characterized in that: described core print body (1) adopts G15 tungsten alloy steel to make.

6. the inner core that moves about according to claim 1 or 2 or 3 or 4 described a kind of cold-drawing seamless tube moulds improves structure, it is characterized in that: described reinforcement pad (3) adopts G15 tungsten alloy steel to make.

7. the inner core that moves about of a kind of cold-drawing seamless tube mould according to claim 5 improves structure, it is characterized in that: described reinforcement pad (3) adopts G15 tungsten alloy steel to make.