CN2252062Y - Compound roller frame flattener - Google Patents

Abstract

The utility model relates to a high-precision compound roller framework straightening machine. In the utility model, three or four pairs of straightening rollers are installed in a rotating framework, revolve along with the framework around the center line of pipes and bars, and simultaneously autorotate around the central axial cords of the straightening rollers, wherein, the roller type of one pair of straightening rollers is a convex-concave roller type with a large inclination angle, or a deep convex type and a shallow convex type, and the rest straightening rollers are in hyperbolic roller type, so the pipes and the bars are straightened in the scope of full length, and the straightness f is smaller than a value which ranges from 0.2% to 0.5%.

Description

Composite roll framework straightener

The utility model belongs to tube bar straightening machine tool equipment.The tube bar straightening machine of extensive use can be divided into cross roll formula (frame is fixed) and frame-type (frame rotation) two big classes in producing at present, and the pipe bar of small dimension adopts the frame-type straightener mostly in the aligning, this straightener is by sending (drawing) material roller that the pipe bar is passed through in rotating frame, in the aligning process, the pipe bar only advances and does not rotate, structure difference according to aligning unit in the framework can be divided into hole pattern, multi roll, dual roll type framework straightener.Casement framework straightener is that 5～7 casements are installed in framework, casement is provided with circle or U-shaped through hole, and available screw is regulated the distance that casement departs from the framework pivot, make the casement interlaced arrangement, the case of bending that the pipe bar forms in casement is as the sine wave (therefore also being referred to as sinusoidal straightener) of decay, when the pipe bar passes through in by the casement with framework rotation, the longitudinal fiber of pipe bar excircle has all passed through and has repeatedly successively decreased recurvation and obtain aligning, flattening precision can reach 1 ‰～2 ‰, and (promptly straight degree is 1～2mm/m,) its shortcoming is to exist strong sliding friction between pipe bar and casement, the casement quick abrasion, pipe bar surface easily is scratched, and head feeding difficulty.Owing to exist violent sliding friction between the casement of casement framework straightener and pipe roller material, be not suitable for aligning surface quality high blank, particularly precision tube, and produce a large amount of frictional dissipations, waste energy.Metallurgical machine designing for manufacturing office of Germany Caro husband company and former Soviet Union central authorities five, the sixties have produced multiple roll framework straightener, the straightener of this kind form is to install in framework.4～7 pairs of smoothing rolls with hyperbola roll forming become smoothing roll and the rolling friction of pipe between bar to sliding friction between casement and pipe bar, and energy savings has improved the quality of managing the bar surface.The framework straightener of above-mentioned two kinds of forms is to realize recurvation to the pipe bar by regulating drafts, and mould apart from or roll spacing be subjected to structural limitations, can not be infinitely small, therefore managing bar can not get recurvation end to end, does not reach to rectify toward positive excessively purpose, influences the further raising of flattening precision.The framework straightener of two this kind of roller framework straightener forms is that two smoothing rolls are installed in framework, its roll design becomes one for protruding, another is a matrix, make the pipe bar in the pass of smoothing roll and flipper guide formation, reach needed recurvation curvature, during work, the pipe bar passes through in the pass of rotation, the same longitudinal fiber of its circle has all passed through ascending on length range, descending again tension and compression deformation and obtain the aligning, can be regarded as comprehensive that the infinitesimal infinite a plurality of 2-2 opposed roll of roll spacing are, make the pipe bar also obtain aligning end to end.Therefore flattening precision improves greatly, can reach 0.2～0.5 ‰, because smoothing roll inclination angle little (10 °～20 °) causes aligning speed low, and the pipe bar difficulty of nipping, the flipper guide quick abrasion easily scratches pipe rod surface again.

The purpose of this utility model is a kind of composite roll framework straightener of design, it is an one with the advantage of multiple roll framework straightener and the advantages of two roller framework straighteners, and overcomes their shortcomings separately, makes pipe bar total length all obtain aligning, flattening precision height, aligning speed also improve greatly.

Design of the present utility model is: the smoothing roll that three pairs of opposed layouts are installed on the rotating frame of straightener at least, wherein there is a pair of smoothing roll roll shape to be under the high inclination-angle one and is convex, another is the convex-concave roll shape of spill, or one be dark recessed roll forming another be the scrobicula roll shape, all the other smoothing roll roll shapes are the hyperbola roll shape, be with a rotation central shaft in each smoothing roll centre bore, the smoothing roll of convex-concave roll forming is installed in the rotating frame and with framework and together rotates under hyperbola roll shape and the high inclination-angle, simultaneously again around the rotation of rotation central shaft.

Because the utility model has adopted composite roll system; pipe bar total length all obtains aligning; the flattening precision height, f≤0.2～0.5 ‰ have solved the multiple roll frame-type straightener low problem of flattening precision end to end; it is low also to have overcome simultaneously two roller framework straighteners aligning speed; the shortcoming of the flipper guide serious wear and the difficulty of nipping owing to there is not the whipping phenomenon, reduces noise greatly; help environmental protection, improve workman's working condition.

Below in conjunction with the embodiment accompanying drawing the utility model is described further:

Accompanying drawing is a composite roll framework straightener structural representation.

The 1.2.5.6.7.8. smoothing roll is the hyperbolic-type smoothing roll as shown, and the 3.4. smoothing roll is the smoothing roll of the convex-concave roll shape under the high inclination-angle of correction, 9. feeding roller, 10. gripping roll, 11. frameworks, 12. rotation central shafts.The drafts of each roller all can be regulated, by regulating 3,4,5, the drafts of 6 rollers, make the pipe bar in roller system, form the theoretical desired recurvation of calculating, when the pipe bar when in pipe bar center atwirl smoothing roll, passing through with framework, the longitudinal fiber of pipe bar excircle has all passed through the recurvation of repeatedly successively decreasing, this process is similar to multiple roll type straightener, again because 3, the roll shape of 4 rollers is by the design of the roll shape principle of two roller framework straighteners, the pipe bar is when passing through this to smoothing roll, all stood the aligning of the high inclination-angle convex-concave roller through revising in length range, this process is similar to the straight machine of two roller frameworks again.Therefore its aligning process is that the advantage of multiple roll framework straightener and two roller framework straighteners is comprehensive.

Claims (3)

1. composite roll framework straightener, it is characterized in that: the smoothing roll that three pairs of opposed layouts are installed in the rotating frame at least, wherein have a pair of smoothing roll roll shape to be under the high inclination-angle one and be convex, another is the convex-concave roll shape of spill, and all the other smoothing roll roll shapes are the hyperbola roll shape.

2. straightener according to claim 1 is characterized in that: be with a rotation central shaft in each smoothing roll centre bore.

3. straightener according to claim 1, it is characterized in that: the smoothing roll that three pairs of opposed layouts are installed in the rotating frame at least, wherein have a pair of smoothing roll roll shape also down one of high inclination-angle be dark recessed roll forming, one is the scrobicula roll shape, all the other smoothing rolls are the hyperbola roll shape.