CN1093623A

CN1093623A - Tube mill for synchronously rolling to produce seamless reductor

Info

Publication number: CN1093623A
Application number: CN 93103860
Authority: CN
Inventors: 朱玉斌; 王卫民; 刘炳南; 张树启
Original assignee: Northwest Institute for Non Ferrous Metal Research
Current assignee: Northwest Institute for Non Ferrous Metal Research
Priority date: 1993-04-13
Filing date: 1993-04-13
Publication date: 1994-10-19

Abstract

In the industrial in the past inner-diameter changeable pipe material processing technology, the reducer pipe intensity of sheet material welding processing is low, bearing load is little, and wall thickness and outside dimension are had certain restriction; The reducer pipe of drawing or spinning process production exists size wayward, the low and problem that is unsuitable for processing the large diameter thin wall pipe of production efficiency.The present invention has drawn pipe mill, and axially the advantage and the size of pipe and tubing of processing are easy to control, the characteristics that surface quality is high, adopt special sending to and rotary part and reducing core, just can produce high-precision unidirectional or two-way interior reducing seamless pipe with common pipe mill, produce inner-diameter changeable pipe material for pipe mill a kind of new method is provided.

Description

Tube mill for synchronously rolling to produce seamless reductor

The invention belongs to the tubing manufacture field, it is characterized in that adopting special transmission, rotatable parts and reducing core, on pipe mill synchronously Rolling Production unidirectional or two-way in the reducing seamless tubular goods.

Produce diameter changeable pipe material in the past and adopted sheet material welding, hubbing, spinning etc.The sheet material welding is according to the requirement of finished product size of pipe and tubing sheet material to be processed into different-thickness, the welding forming that adopt to curl then, and the diameter changeable pipe material of this technology manufacturing does not have tangible weld seam, and is attractive in appearance, intensity is low, bearing load is little.In addition because welding region needs certain thickness, and sheet material radius can not be too little when curling, so this method to tubing have very big restriction with external diameter, can't produce the reducer pipe that wall is thin or the footpath is little.Hubbing adopts core tube-drawing method, the change that realizes pipe internal diameter or wall thickness of moving by core print position in the tube-drawing process, the diameter changeable pipe material surface quality of drawing process processing is poor, internal diameter or wall thickness change amplitude are limited and wayward, in addition, for major diameter and thin-wall pipes processing difficulties.The spinning method is to adopt the reducing core on spinning machine pipe being spun into inner-diameter changeable pipe material.Be that spiral advances in the tubing process, its processing streamline also belongs to spirality, and this material is not suitable for makes the radial force parts.

The objective of the invention is in order to overcome the weak point of above several processing technologys, the suction pipe mill axially advantage and the size of pipe and tubing of processing is easy to control, the characteristics that surface quality is high, adopt special sending to and rotary part and reducing core, on pipe mill, realize rolling synchronously and produce high-precision inner-diameter changeable pipe material, thereby overcome the deficiency that pipe mill can only be produced single isometrical pipe or process outer tapered pipe by the slideway gradient, produce inner-diameter changeable pipe for pipe mill a kind of new method is provided.

The present invention is three more additional special parts in position on pipe mill, makes common pipe mill can process inner-diameter changeable pipe material.(1) core part, the design of core are to carry out according to the requirement of reducing in the finished product tubing, require its shape and diameter changeable pipe material interior shape to match, and can adopt unidirectional reducing core or two-way reducing composite core formwork; (2) translator unit fixes core bar and feeding trolley, and making does not have axial relative motion between the two, but core bar still can keep rotating; (3) rotating part, rotation slideway on the core bar outer cover, slideway inside is non-circular, simultaneously core bar or its part section being made cross section shape matches with cross section, sliding shape road interior shape, slideway is fixed on the rotating chuck of former pipe mill, slideway rotates to drive core bar, but does not influence endwisely slipping of the two, and it installs as shown in Figure 1.Form by reducing composite core formwork (2), roll (3), core bar (4), feeding trolley (5), translator unit connector (6), slideway (9).1 is the diameter changeable pipe material after the processing among the figure.

Process of the present invention is as follows:

1, transfer member (6) is fixed on the core bar (4) and feeding trolley (5) of pipe mill;

2, slideway (7) is enclosed within on the core bar (4), and with the scroll chuck that rotates usefulness on the milling train that slideway (7) is fixing.

3, reducing composite core formwork (2) is tied, and fixing with core bar (4);

4, on reducing composite core formwork (2), put pipe;

5, start pipe mill, pipe and core are synchronized with the movement in process;

6, whole tubing completion of processing is separated core (2), tubing with core bar;

7, core (2) is taken apart from two ends to withdraw to obtain the required size reducer pipe;

8,

repetition

3,4,5,6,7, operation can be produced continuously.

The present invention has drawn pipe mill, and axially the advantage and the size of pipe and tubing of processing are easy to control, the characteristics that surface quality is high, more additional simple components, make common pipe mill can produce high-precision unidirectional or two-way interior reducing seamless pipe, production specification is external diameter φ 10～50mm, long 350～700mm becomes wall thickness 4～0.3mm.For reducing material in the pipe mill production provides a kind of new method.

Embodiment

Make two-way interior reducing Ti-3Al-2.5V alloy pipe.Transfer member (6) is fixed on the core bar (4) and feeding trolley (5) of milling train; Slideway (7) is enclosed within on the core bar (4), and slideway is fixed with the scroll chuck that rotates usefulness on the milling train; Reducing composite core formwork (2) and core bar are tied and fix; Get pipe φ 24.2mm * 1.10mm * 400mm it is enclosed within on the reducing core (2), start pipe mill, pipe and core are synchronized with the movement in process, and whole tubing completion of processing is separated core, tubing with core bar; Core taken apart from two ends to withdraw from can get the required size reducer pipe as shown in Figure 2, this tubing machining deformation amount maximum is 65%, and minimum place is 11%.

Claims

1, tube mill for synchronously rolling to produce seamless reductor of the present invention is characterized in that adopting special transmission, rotatable parts and reducing core, on pipe mill synchronously Rolling Production unidirectional or two-way in the reducing seamless tubular goods.

2, said transmission is to be linked by the core bar of the dolly of selecting materials according to claim 1.

3, according to the said rotatable parts of claim 1, rotation slideway on the core bar outer cover, slideway is fixed on the rotating chuck of pipe mill, and slip can drive core bar and rotate.