CN2224041Y

CN2224041Y - Rotational-moulding rolling apparatus

Info

Publication number: CN2224041Y
Application number: CN 94217372
Authority: CN
Inventors: 蔡永福
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-20
Filing date: 1994-07-20
Publication date: 1996-04-10
Anticipated expiration: 2004-07-20

Abstract

The utility model relates to a rotational-moulding rolling apparatus composed of a driving system, an electromotor and a rotary mould. The utility model is characterized in that the rotary mould is composed of a die sleeve, a shaft, a bearing and tapered rolls, and both ends of the shaft are both provided with support columns in the die sleeve. The input end of the driving system is connected with the electromotor, the output end adopts a hollow revolving sleeve pipe to substitute an output shaft, one end of the revolving sleeve pipe is connected with a fixed disk, and the rotary mould is arranged on the fixed disk. A fore gripper is arranged in front of the rotary module, and a rear holder is arranged at the back of the driving system. A heater is arranged between the fore gripper and the rotary mould. The utility model has simple structure and low energy consumption, and is suitable for rolling metal tubes and bars.

Description

Revolve the mould rolling equipment

The utility model relates to a kind of mould rolling equipment that revolves, and belongs to metal tube and rolling bar equipment.

Produce hot rolled seamless steel tube both at home and abroad all through the tube rolling operation.The method of tube rolling has automatic tube rolling mill, Pilger pilger mill, continous way pipe mill, Diesel's milling train, three-roll pipe mill or the like, has occurred three-roller planetary rolling mill behind the seventies again.

Pipe mill divides two kinds of axial rolling and oblique millings again, and the axial rolling pipe mill is because distortion makes pipe be easy to generate wall unevenness on same section.And the deformation condition of oblique milling is better than axial rolling, but oblique milling is easy to generate tube wall helical form wall unevenness and tail triangle.

Above-mentioned two kinds of milling train wall thickness reducing amounts and sizing reduction all are subjected to the restriction of milling train power, so tube reducing or wall thickness reducing amount must increase rolling pass greatly.

What will carry especially here is three-roller planetary rolling mill, being called for short PSW (Plane SchrageWalzwerk) is the novel rolling mill that West Germany occurs at early seventies, the characteristics of this milling train are heavy reductions, and the single pass percentage elongation can reach 15, are equivalent to the breaking elongation of one group of eight frame continuous-rolling.As seen this is a kind of energy-conservation milling train of low energy consumption, and possesses facility compact and take up an area of little advantage, thereby as the rolling equipment of bar and tubing, once causes domestic and international expert's attention.The PSW milling train is to drive roll together by two output systems, makes that stocking has only axially-movable and motion without spin when rolling, thereby mechanical driving part is complicated.Three tapered rollers installing on the revolution deep bid of PSW machine are cantilever design in addition, necessarily require firm bearing arrangement, and gear train assembly also needs to be installed in an end of roll mandrel simultaneously.These mechanical parts all are installed on the deep bid, make the deep bid diameter can't do for a short time.Need the part of adjustment many more, the diameter of deep bid is also just big more.And during big disc spins, these parts all must be along with rotating around rolling axle, and the maximum gauge that generally turns round deep bid is about 20 times of the stocking external diameter that rolled.Consider the influence of centrifugal force when design, the deep bid diameter can not be excessive, and rolling rotating speed can not be too high.Be generally at present about 400 rev/mins, diameter is excessive, and rotating speed then will be lower.

Another significant problem of PSW machine milling train is exactly the roll shape control problem of roll, and can roll shape be the key that produce qualified products in the operation of rolling.In general, a kind of roll shape can only be produced a kind of product of external diameter.The PSW milling train is to come the product of rolling various outer diameter by adjusting the angle of the crossing and two parameters of advancing angle, obvious this adjustment can only solve the requirement (margin of tolerance allows) of a part of product, and adjust and does not badly just guarantee product quality formation threaded line or helical form wall unevenness, and defectives such as dimensional accuracy and surface quality difference are arranged.The pace of rolled piece is determined that by the angle of the crossing and advancing angle in case angle has been decided, rolling pace just is determined and can't adjusts, and this just makes the helical form defective on stocking surface overcome.

It is a kind of simple in structure that the purpose of this utility model is to provide, and volume is little, and roll shape must not adjusted and can guarantee product quality, the lengthening coefficient that has kept the PSW milling train simultaneously is big, and tube reducing subtracts wall and can carry out simultaneously, saves the energy, facility compact, what take up an area of advantage such as little revolves the mould rolling equipment.

The purpose of this utility model realizes with the following methods:

The utility model by transmission system, motor, revolve mould and form.Revolving mould is critical component of the present utility model, is made up of die sleeve, axle, bearing and the cone-shaped roll that rotates freely, and all there is support at the two ends of axle in die sleeve; The utility model only is provided with one group of transmission system, the input of transmission system and motor connect, its output replaces output shaft with a hollow revolution sleeve pipe, end at the revolution sleeve pipe is connected with fixed disk, revolving mould is contained on the fixed disk, when the rotation of electric-motor drive revolution sleeve pipe, also just drive fixed disk and rotate together.Revolve mould and fixed disk by Bolt Connection, and to revolve mould be removable.

Another critical component of the present utility model is front clamp device and back clamper, and the front clamp device is located at the front of revolving mould, and back clamper is located at the back of transmission system, and they are formed by buncher, decelerator, leading screw, clamp.The speed of control motor has also just been controlled advancing or astern speed of clamper.

The utility model front clamp device and revolve and be provided with heater between the mould, purpose is the heating rolled piece, more accurately controls the rolling temperature of rolled piece.

The utility model has the advantages that: simple in structure, easy to operate, small investment is taken up an area of for a short time, saves the energy.Because a kind of product that revolves the rolling a kind of specification of mould of specification, and pitch can arbitrarily adjust, so good product quality.

The utility model will be further described below in conjunction with accompanying drawing:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that the A-A that revolves mould shows schematic diagram to cuing open.

With reference to accompanying drawing 1 and Fig. 2, the utility model revolve the mould rolling equipment by transmission system [10], motor [18], revolve mould [7] and form.The input of transmission system [10] and motor [18] join, and its output replaces output shaft with a hollow revolution sleeve pipe [11], is carved with keyway at an end that turns round sleeve pipe [11], connects with fixed disk [17] with key.Revolving mould [7] is the main tool of rolled steel tube, it is made up of die sleeve [8], axle [9], bearing [6] and cone-shaped roll [5], die sleeve [8] is a garden shape housing, three three axles that distribute by 120 degree (also can adorn a plurality of axles) wherein are housed, on axle [9], through bearing [6] cone-shaped roll [5] is housed, the two ends of axle [9] all are fixed in the die sleeve [8], the roll shape of formed technological angle relation in the center line of three axles and rolling center and tapered roller [5], then, be designed to best state according to the rolling pipe specification of require.On fixed disk [17], have six the 60 uniform holes of degree, to revolve mould [7] with six bolts is fastened on the fixed disk [17], when rotating, the revolution sleeve pipe [11] of output drives fixed disk [17] rotation, then drive during fixed disk [17] rotation and revolve mould [7] rotation, like this, when needs production products of different specifications, need not adjust any parameter, but the mould [7] that revolves of changing corresponding specification gets final product, therefore can guarantee that product quality has improved operating rate again, carry out smoothly in order to make the operation of rolling, pipe does not rotate in the operation of rolling, be provided with front clamp device [3] at the front end that revolves mould [7], front clamp device [3] is by clamp [16], turn-screw [15] is driven by buncher [13] through worm reduction gear [14], clamping hollow forging [2] by clamp [16] in the operation of rolling makes it not rotate, clamper [3] is pushed ahead hollow forging [2] with the speed of 20～50mm/t simultaneously, hollow forging [2] is heated by electric furnace [4], enter after the heating and revolve mould [7] and be rolled, when clamp [16] will be near heating furnace [4], then clamp [16] is unclamped, and turn-screw [15] is reversed, clamp [16] is turned back to the original place, this moment, one end of steel pipe was rolled into finished product, and shut out from revolution sleeve pipe [11].For pipe is not still rotated after front clamp device [3] unclamps, therefore the port of export at revolution sleeve pipe [11] is provided with back clamper [12], the structure of back clamper [12] is identical with front clamp device [3], that is to say in the operation of rolling, in the clamper of front and back a clamper being arranged at least is to clip steel pipe to make it not rotate, and is controlling the pace of steel pipe.In the operation of rolling, the temperature of hollow forging is about 1000 ℃, and cone-shaped roll [5] and transmission system [10] will heat up, and adopts the water spray cooling, revolves the production of tube rolling and still adopts retained mandrel [1] in the usual course.

The utility model also is applicable to the rolling of bar.

Claims

1. one kind revolves the mould rolling equipment, by transmission system, motor, revolves mould and forms, and it is characterized in that:

A. revolve mould and be made up of die sleeve, axle, bearing and cone-shaped roll, all there is support at the two ends of axle in die sleeve;

B. the input of transmission system and motor connect, and its output replaces output shaft with a hollow revolution sleeve pipe, is connected with fixed disk at an end that turns round sleeve pipe, revolves mould and is contained on the fixed disk;

C. be provided with the front clamp device in the front of revolving mould, be provided with the back clamper in the back of transmission system;

D. at the front clamp device and revolve and be provided with heater between the mould.

2. the mould rolling equipment that revolves according to claim 1 is characterized in that front clamp device and back binder are by buncher, decelerator, leading screw, clamp composition.

3. the mould rolling equipment that revolves according to claim 1 and 2 is characterized in that revolving mould and fixed disk by Bolt Connection, and to revolve mould be removable.