Unlock instant, AI-driven research and patent intelligence for your innovation.

Limiting core rod cold drawn tube technique and equipment thereof

A technology of limited mandrel and cold drawn pipe, which is applied in the production process and equipment field of steel pipe cold drawing, can solve the problems of increasing process flow and equipment, and needs, so as to save manufacturing cost, reduce production cost, and reduce friction Effect

Inactive Publication Date: 2009-08-19
攀钢集团成都钢铁有限责任公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the drawing is completed, special rod removal equipment is needed to remove the mandrel from the steel pipe, which increases the process flow and equipment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Limiting core rod cold drawn tube technique and equipment thereof
  • Limiting core rod cold drawn tube technique and equipment thereof
  • Limiting core rod cold drawn tube technique and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like figure 1 As shown, the mandrel 4 is first placed on the restraint trolley 1, and the restraint trolley 4 is installed on the restraint trolley slideway of the same drawing production line as the draft 3, and the restraint trolley is moved by chain transmission or hydraulic cylinder transmission. Way. The steel pipe blank 2 is placed on the stand before the drafting 3, which is the same as the existing drawing stand or the stand combined with the trolley slideway, as long as the steel pipe blank 2 can be connected with the drafting 3 It can be aligned with mandrel 4. Then, through the movement of the stop trolley 1, the mandrel is inserted into the steel billet 2, and the head clamping section 8 of the steel billet 2 is clamped by the cold drawing chuck 5 and passed through the drafting die 3 for drawing. During the drawing process, as the cold drawing chuck 5 drives the steel pipe blank 2 to be drawn, the stop trolley 1 also drives the mandrel 4 to move in the dr...

Embodiment 2

[0030] In conjunction with Example 1, such as figure 1 As shown, after the drawing of the steel pipe blank 2 is completed, use such as figure 2 The shown fork 6 structure. However, after the fork 6 is lifted by the fork hydraulic cylinder 7, the fork 6 is stuck between the rear end face of the steel billet 2 and the outlet end of the draft mold 3, and the mandrel is demoulded, which can also achieve the same prevention of the steel billet 2 from moving. the goal of.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a production process and equipment for a steel pipe, in particular a production process and equipment suitable for steel pipe cold drawing. The frictional force between the tube blank and the mandrel provided by the present invention is smaller than that of the short mandrel drawing method, and the mandrel length is shorter than that of the long mandrel drawing method. The steel pipe cold drawing process includes The following steps: A. Put the steel billet before drawing into the draft mold, and put the mandrel in the steel billet; B. The cold drawing chuck clamps the steel billet through the front head of the draft section, and the steel pipe billet Carry out drawing; C. During the drawing process, the drawing speed V1 of the steel pipe billet is greater than the moving speed V0 of the mandrel; D. After the steel pipe drawing is completed and the drawing is completed, the mandrel is drawn using the lifting fork set behind the drawing form. off stick. The invention also provides a limited-movement mandrel cold drawing machine. By adopting the process and equipment of this patent, the friction between the steel pipe billet and the mandrel is reduced, the wear and replacement frequency of the mandrel are reduced, the production cost is reduced, and the production efficiency and product quality are improved.

Description

technical field [0001] The invention relates to a production process and equipment for a steel pipe, and is particularly suitable for the production process and equipment for steel pipe cold drawing. Background technique [0002] The existing steel pipe cold drawing production process mainly includes the empty drawing method without mandrel and the drawing method with mandrel (plug). Among them, the drawing method with mandrel includes short mandrel drawing method and long mandrel drawing method. Law. [0003] When the short mandrel drawing method is adopted, the mandrel is fixed in the cold drawing deformation zone by the mandrel trolley and does not move with the steel pipe. After the steel pipe drawing is completed, it will automatically separate from the mandrel to complete the drawing. The drawing method has the disadvantages of high sliding speed between the inner surface of the steel pipe and the surface of the mandrel, high friction, and large drawing force, result...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B21C1/24B21C1/32B21C1/30
Inventor 成海涛
Owner 攀钢集团成都钢铁有限责任公司