CN88200140U - Tube blank hydraulic heat centring machine - Google Patents

Abstract

The utility model relates to a tube blank hydraulic heat centering machine, which is suitable for the process of the rolling seamless tube. One end surface of the tube blank is centered in advance before the tube blank is perforated on a heat condition. The utility model is characterized in that the axial feed stock is adopted, and the contraposition of the stop stock and the clamping punching are completed once. A positioning cushioning device is installed at the front part of the centering head, and the lower direction of the clamp combined body is provided with a lifting mechanism, which makes the center height of the punching adjusted freely. The utility model is suitable for the rolling requirement of various specifications and dimensions of the tube rolling train.

Description

Tube blank hydraulic heat centring machine

A kind of pipe hydrothermality centring machine is particularly suitable in the roll seamless steel tube technology pipe pipe one end face before hot state perforation and gives first centering.Belong to the roll seamless steel tube technical field.

The pipe of rolled steel tube is after the rotary heating furnace heating, being transported to punch by roller-way and lateral transfer device carries out before the pipe perforation, tube quality for after guaranteeing to bore a hole requires pipe one end face that a hollow circular hole should be arranged, and promptly makes a call to a thought-read hole at pipe one end face.Therefore, between rotary heating furnace and punch, need establish a centring machine.

At present, the old-fashioned pneumatic or mechanical type hot centering machine of domestic and international common usefulness.Hot centering machine as the Soviet Union＜400〉unit setting is pneumatic means, and this device does not also have the aligning function except that pressure is low, so internal point warp and hole depth and center precision have not all satisfied the requirement of modernized rolling technique.For this reason, the hydraulic stator mode is all being sought by many countries, and the comparatively advanced hydraulic pressure pipe hot centering machine of domestic existing use is made up of frame, clamping device, centering head and driving hydraulic cylinder, and And is provided with synchronous centering machine.But because this equipment punching oil cylinder must expose, so that the taking-up actuating signal forces pipe to cause technological process to have some setbacks by the side direction charging, the clamp opening degree increases, energy consumption is big, Hydraulic Station expense height, and the technology delivery time is long, even more serious is that iron scale gathers too much on the punching stand, pipe center bed hedgehopping, repeatedly punching back centered positions is inaccurate, becomes the major defect of centring machine.

For addressing the above problem, a kind of simplification technological process of ad hoc meter reduces hydraulic flow, eliminates accumulating of iron scale and influences the inaccurate novel pipe hydrothermality centring machine of centering skew.

The utility model is achieved in that and has reduced this intermediate link of centering baffle plate between heating furnace and centring machine that some producers adopt, take axial admission, realized that positional punch centering finishes on same support, because the maximum pipe of axial admission weighs 2.4 tons, maximum operational speed is less than 2m/S, therefore must consider the buffering requirement that stops expecting.To this, the utility model has been set up buffer unit between jaw, and in order to adapt to the rolling requirement of tube rolling unit to the steel pipe of all size size, the utility model has designed the variable lifting regulating mechanism of punching centre-height.

Described below in conjunction with accompanying drawing.

Description of drawings:

Fig. 1: hot centering machine final assembly front view;

Fig. 2: hot centering machine side view;

Fig. 3: clamp combination front view;

Fig. 4: be Fig. 3 A-A cutaway view;

Fig. 5: location, punching and hole depth fundamental diagram;

Fig. 6: pipe hot centering machine floor plan.

Fig. 6 (a) is equipped with this intermediate link of positioning baffle (12) between domestic existing pipe hot centering machine floor plan, its centring machine (13) and the heating furnace (14); Fig. 6 (b) is the utility model floor plan, has been characterized in reducing the intermediate link of positioning baffle (12), thereby has made technological process rationally also shorten the intermediate transfer time.

Fig. 4 is Fig. 3 A-A cutaway view, and the utility model punching oil cylinder (9) directly is loaded in the body with punching barral of a gun (10), centering head (7), location buffer (6), buffer spring (8), and operating personnel can't see centering head (7).Because consider the compactness of geometric space, buffer spring of the present utility model (8) has adopted the bigger butterfly spring of rigidity.Gland ring is fixed with screw as the buffer baffle plate, and when making buffer be subjected to external force, under the effect of spring, activity freely.

Clamp combination (Fig. 3) is loaded in the frame (1), makes up not reason lift cylinder (11) draining and that the clamp combination is had is movable a little of this body in order to make clamp, at the entablature of frame bolt is housed and fixes with the clamping plate (5) of clamp combination.

In order to satisfy the needs of highly regulating, lift cylinders (11) is installed in position shown in Figure 1.PARTICLE BOARD SCREWS in the support top end of lift cylinders and the clamp combination is fixed.When needs are regulated height, only need press lift cylinders operation button, can reach the purpose that moves up and down that makes up this body as Fig. 3 clamp.

The course of work of pipe hot centering machine is: when the operator finds on the roller-way blank to be arranged, need only take feed electricity knob off, blank moves to centring machine voluntarily, hot metal detector sends information after receiving signal immediately, clamping cylinder (4) action, clamp (2) clamps pipe, at this moment, centering lazy-tongs (3) have kept on the clamp, down synchronously, when clamping oil cylinder (4) action reaches setup pressure value, the oil cylinder (9) that then punches begins action, centering head (7) punches to pipe one end face, reposition voluntarily immediately after punching is finished, and clamp (2) unclamps and moves back cylinder and carry out automatically simultaneously, the roller-way revolution makes pipe enter next procedure.

The degree of depth of above-mentioned course of action and punching, overall process realizes (PLC) control automatically, utilize the flow (being speed) of hydraulic proportional flow valve not to be subjected to the characteristic of extrernal resistance variable effect, can make punching rifle forward-reverse speed keep constant, like this by setting to actuation time, record and calculate can obtain indirectly the to punch information of oil cylinder (9) action, its operation principle (Fig. 5) as described below

S ₁＝T ₁×V S ₂＝T ₂×V

T ₃＝ (V)/(V _＊) （T ₁＋T ₂）＝K（T ₁＋T ₂）

K=(V)/(V wherein _*)=(A _*)/(A)

A _*The rod chamber area

A rodless cavity area

T ₁-record value

T ₂-setting value

T ₃-calculated value

T ₁Value is begun to P from the action order by timer _SSend till the pressure signal T ₂Value is given first setting according to the degree of depth of punching, and reposition is then by T ₃Calculating formula is calculated at random by CPU, and reason at random is because the buffer location becomes with the variation of blank speed and weight here, that is S ₁Value is a change at random, so every dozen of holes of oil cylinder must return to original position and just need by T ₃Time is determined each T ₃Value changes, and it is worth with T ₁Value is calculated rapidly after being obtained by timer, and shows its result, and this also is to be different from existing hydraulic pressure pipe hot centering machine oil cylinder must expose the effective measures that could take out actuating signal.

The utility model has the advantages that: solved the location and be centered on the same support and finish, realized that pipe can axial admission, fundamentally overcome the shortcoming that existing technological process has some setbacks. The utility model host machine part power can parameter can parameter be twice than existing pipe hot centering machine power, the aperture is 50-90mm, hole depth is 50-70mm, maximum centering pressure is 80 tons, chucking power is 230 tons, can realize many specifications on＜400〉automatic mill group, various apertures and hole depth requirement, not because of the change in location of pipe specification Different Effects pipe end face centring point, namely be positioned at all the time the center of pipe simultaneously. In existing＜400〉Transformation of Unit, need not to do large-scale change, save improvement expenses, because axial admission tong chops degree is little, shorten the ability that the charging of operation working time ratio side direction greatly reduces Hydraulic Station that clamps, and technological process is suitable, easy to operate, do not exist iron scale to accumulate the phenomenon of impact centering skew, guaranteed the rolling mill practice requirement.

Claims (2)

1, a kind of pipe hydrothermality centring machine is particularly suitable for seamless steel pipe hot-rolling pipe hot centering machine, and it comprises frame, clamping device, centering head and driving hydraulic cylinder, and of the present utility model being characterised in that:

(1) in centering head (7) front portion the location buffer unit is housed.

(2) below clamp combination body, elevating mechanism is housed.

2, hot centering machine according to claim 1 is characterized in that buffer unit is made up of buffer (6) and spring (8).

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