CN201127951Y

CN201127951Y - Large-sized pipe fitting calender

Info

Publication number: CN201127951Y
Application number: CNU2007200160754U
Authority: CN
Inventors: 刘刚; 王光儒; 张福录
Original assignee: China First Heavy Industries Co Ltd; CFHI Dalian Design and Research Institute Co Ltd
Current assignee: China First Heavy Industries Co Ltd; CFHI Dalian Design and Research Institute Co Ltd
Priority date: 2007-11-22
Filing date: 2007-11-22
Publication date: 2008-10-08
Anticipated expiration: 2017-11-22

Abstract

The utility model relates to a large-sized pipe casting mangler, in particular to a method that a compression roller is adopted to malleate the large-sized pipe casting in a hot state to enlarge the diameter and reduce the thickness of the wall, which belongs to the metal malleating technical field. The large-sized pipe casting mangler consists of a frame, a power transmitting mechanism, an inner compression roller, an outer compression roller, a force applying mechanism and a balancing mechanism, wherein, the inner compression roller is arranged at the upper end of the frame, the outer compression roller is arranged inside a sliding bracket at the lower end of the inner compression roller; the lower end of the sliding bracket is connected with the force applying mechanism; the large-sized pipe casting is inserted on the inner compression roller, the outer wall corresponds to the lengthways position of the outer compression roller; the rotating directions of the inner compression roller and the outer compression roller are opposite under the drive of an electrical motor and a transmission mechanism, the pipe wall of the large-sized pipe casting is laminated continuously under the relative pressure of the force applying mechanism along with the relative movement of the inner compression roller and the outer compression roller, the frame of the two sides at the lower end of the outer wall of the pipe casting is provided with a left horizontal guide roll and a right horizontal guide roll. The large-sized pipe casting mangler has the characteristics of high working efficiency, small thermal loss and high material operating factor, etc.

Description

The macrotype pipe fittings calendering machine

Technical field

The utility model relates to a kind of macrotype pipe fittings calendering machine, will be in macrotype pipe fittings calendering under the hot state with pressure roller specifically, to reach the method that enlarged diameter reduces wall thickness, belongs to the rolling metal technical field.

Background technology

At present, known macrotype pipe fittings calendering machine is, adopt the ton hydraulic press to carry out enlarged diameter and reduce that wall thickness realizes by saddle and last anvil block, calendering effect by saddle and last anvil block reduces wall thickness, every pressure rotates to an angle after once, under the rolling temperature condition that allows, one encloses straightening reaches goal standard like this.Problems such as but this kind processing method exists efficient low, uses duration thermal losses height, and precision is low, and the big stock utilization of allowance is low.The specification of described large-size pipe be diameter more than or equal to 2m, length is greater than 500m.Developing a kind of large-size pipe two-roller mill at existing problem in the prior art is very necessary to solve existing problem.

Summary of the invention

In order to overcome the deficiency on the above-mentioned technical method, the purpose of this utility model is the equipment of a kind of different machining large pipe fitting of development, and this equipment has overcome former method and existed efficient low, with duration thermal losses height, problems such as precision is low, and the big stock utilization of allowance is low.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of macrotype pipe fittings calendering machine described in the utility model; It is characterized in that being formed by frame, power transmission mechanism, inner press roll, outer pressure roller, force application mechanism, balanced controls; Inner press roll is loaded on the upper end of frame, outer pressure roller is loaded in the slipper bracket of inner press roll lower end; The lower end of slipper bracket is connected with force application mechanism; The large-size pipe cover is inserted on the inner press roll, and its outer wall is corresponding with vertical position of outer pressure roller; The direction of rotation of inside and outside pressure roller under motor and transport sector driving, relative motion along with inside and outside pressure roller, and depress the tube wall that rolls large-size pipe continuously in adding relatively of force application mechanism, on the frame of both sides, pipe fitting outer wall lower end, have left and right horizontal guide roller.

Frame described in the utility model has two groups and is installed on the rail chair respectively, and is connected with two middle cross beams by sill, forms the framework of calender.All have identical force application mechanism, identical left and right horizontal guide roller and left and right upright deflector roll on forward and backward two groups of frames.

Force application mechanism described in the utility model push away on being hydraulic cylinder, on push away hydraulic cylinder the piston rod front end be connected with slipper bracket, the two side ends of slipper bracket is slided and is loaded in the chute of guide rail, outer pressure roller is installed on the slipper bracket.

Rotary left and right horizontal guide roller described in the utility model is loaded on the upper corners place of left and right A-frame respectively; Medial angle is loaded on the and arranged on left and right sides middle-end of frame by articulated manner in addition, and lateral angle is connected by the piston rod end of articulated manner with left and right horizontal guide roller hydraulic cylinder; The lower end of hydraulic cylinder is hinged with the left and right bearing that is loaded on both sides, frame lower end respectively.

But the outer wall place of the upper end pipe fitting of frame described in the utility model has the left and right upright deflector roll of supplemental support pipe fitting, and the upper end contact-making surface of left and right upright deflector roll is an arc.

The radial pressure F of inside and outside pressure roller described in the utility model is 6500-75000KN, the rotating speed of inner press roll is 3.5rpm-7.0rpm, the rotating speed of outer pressure roller is 4.7rpm-9.4rpm, the pipe fitting width is 3500mm-4000mm, the barrel length of inside and outside pressure roller is 3000-4500mm, the temperature of pipe fitting when calendering is 1200 ℃-1000 ℃, and the used time of rolling one-period is 280 seconds-320 seconds.

The beneficial effects of the utility model are: owing to be continuous distortion, consuming time only be 1/8 of conventional method, owing to adopt two pressure rollers to be installed in the interior structure of fixing closed frame, makes the pipe thickness precision obtain fine control, is 30 times of traditional precision.So have characteristics such as high efficiency, thermal losses are little, stock utilization height.

Description of drawings

The utility model has four accompanying drawings, wherein:

Accompanying drawing 1 is the structural representation of macrotype pipe fittings calendering machine.

Accompanying drawing 2 is side-looking structure charts of accompanying drawing 1.

Accompanying drawing 3 is A-A sectional structure charts of accompanying drawing 1.

Accompanying drawing 4 is B-B sectional structure charts of accompanying drawing 2.

Among the figure: 1, left support abutment, 2, frame, 3, sill, 4, middle cross beam, 5, inner press roll, 6, outer pressure roller, 7, on push away hydraulic cylinder, 8, left horizontal guide roller, 9, left horizontal guide roller hydraulic cylinder, 10, right upright deflector roll, 11, pipe fitting, 12, the upright deflector roll in a left side, 13, right support abutment, 14, right horizontal guide roller hydraulic cylinder, 15, left tripod, 16, right A-frame, 17, right horizontal guide roller, 18, guide rail, 19, slipper bracket.

The specific embodiment

Mechanism's explanation

Two rail chairs are installed on the basis.Two frames 2 are installed on the rail chair, and are middle by sill 3 and two middle cross beams 4 connections, form the framework of this milling train.Forward and backward two groups of frames all have same structure

Each framework window bottom is respectively installed and is pushed away hydraulic cylinder 7 on one, on what push away that hydraulic cylinder 7 installs above is outer pressure roller 6.Inner press roll 5 is installed on frame 2 window tops.Inner press roll 5 is connected with the transport sector of driven by motor respectively with outer pressure roller 6.

The frame both sides respectively are provided with a left and right

horizontal guide roller

8,17, and this

horizontal guide roller

8,17 is at the effect lower swing of left and right horizontal guide roller hydraulic cylinder 9,14.Every group of hydraulic cylinder that two identical styles are all arranged in left and right two groups of hydraulic cylinders.There are four upright deflector rolls to divide left and right upright deflector roll 12,10 in the frame installed inside.On the pressure roller 6, inner press roll 5 is in pipe fitting 11 endoporus outside for pipe fitting 11.

Operation principle:

On push away in the hydraulic cylinder 7 plunger and release, promotes outer pressure roller 6 risings, the roll gap between outer pressure roller 6 and the inner press roll 5 is reduced, to reach the purpose that makes the minimizing of pipe fitting 11 wall thickness.

In rolling process, two

horizontal guide rollers

8,17 pipe fitting 11 in pipe fitting 11 supported on both sides, utilize the effect of horizontal guide roller

hydraulic cylinder

9,14 simultaneously, make 8,17 pairs of pipe fittings 11 of horizontal guide roller play the round effect of returning.

In rolling process, when pipe fitting 11 when endwisely slipping, play backstop action by upright deflector roll 10,12.

In the embodiment shown in fig. 1, inner press roll 5 and outer pressure roller 6 rotate with certain speed under pressure must act on, large-size pipe 11 inner press roll 5 and outside the effect lower wall thickness attenuation of pressure of pressure roller 6, under the effect of moment of torsion, rolled continuously, thereby make large-size pipe 11 wall thickness attenuation diameters become big, reach the requirement specification; The relative radial pressure F of inner press roll 5 and outer pressure roller 6 is 7000KN in the utility model; The rotating speed of inner press roll 5 is 5 rev/mins; The rotating speed of outer pressure roller 6 is 7 rev/mins, and the body of roll length of inside and outside pressure roller is established and is 3850mm; 1200 ℃-1000 ℃ of the rolling temperatures of large-size pipe 11, be 300 seconds the cycle time of a rolling large-size pipe.

Claims

1, a kind of macrotype pipe fittings calendering machine; It is characterized in that being formed by frame (2), power transmission mechanism, inner press roll (5), outer pressure roller (6), force application mechanism, balanced controls; Inner press roll (5) is loaded on the upper end of frame (2), outer pressure roller (6) is loaded in the slipper bracket (19) of inner press roll (5) lower end; The lower end of slipper bracket (19) is connected with force application mechanism; Large-size pipe (11) cover is inserted on the inner press roll (5), and its outer wall is corresponding with vertical position of outer pressure roller (6); The direction of rotation of inside and outside pressure roller (5,6) under motor and transport sector driving, relative motion along with inside and outside pressure roller (5,6), and depress the tube wall that rolls large-size pipe (11) continuously in adding relatively of force application mechanism, on the frame (2) of both sides, pipe fitting (11) outer wall lower end, have left and right horizontal guide roller (8,17).

2, macrotype pipe fittings calendering machine according to claim 1; It is characterized in that frame (2) has two groups and is installed in respectively on the basic rail chair, and be connected with two middle cross beams (4), form the framework of calender by sill (3); All have identical force application mechanism, identical left and right horizontal guide roller and left and right upright deflector roll on forward and backward two groups of frames.

3, macrotype pipe fittings calendering machine according to claim 1 and 2; It is characterized in that force application mechanism push away on being hydraulic cylinder (7), on push away hydraulic cylinder (7) the same slipper bracket of piston rod front end (19) be connected, the two side ends of slipper bracket (19) is slided and is loaded in the chute of guide rail (18), and outer pressure roller (6) is installed on the slipper bracket (19).

4, macrotype pipe fittings calendering machine according to claim 1 and 2; It is characterized in that rotary left and right horizontal guide roller (8,17) is loaded on the upper corners place of left and right A-frame (15,16) respectively; Medial angle is loaded on the and arranged on left and right sides middle-end of frame (2) by articulated manner in addition, and lateral angle is connected by the piston rod end of articulated manner with left and right horizontal guide roller hydraulic cylinder (9,14); The lower end of hydraulic cylinder is hinged with the left and right bearing (1,13) that is loaded on frame (2) both sides, lower end respectively.

5, macrotype pipe fittings calendering machine according to claim 1 and 2; It is characterized in that at the upper end pipe fitting (11) of frame (2) but the outer wall place have the left and right upright deflector roll (12,10) of supplemental support pipe fitting (11), the upper end contact-making surface of upright deflector roll is an arc.