CN1157759A - Cross feeding type metal bar method and device straightening - Google Patents

Abstract

A method and its apparatus for straightening high-strength alloy steel rods which are fed horizontally features that said rod is straightened in passes formed by 5 pairs of straightening rollers, where it is recurvated and elastoplastically deformed. The seat of roller 1 is directly conencted to piston rod of hydraulic cylinder and the roller 1 moves up and down quickly under the drive of piston rod. After roller/moves up, said rod is pushed on roller 2 by push mechanism. When roller 1 moves down, the rod is in gap between roller 1 and 2 and under the drive of roller 2, it does spiral movement into the next strengthening pass.

Description

Cross feeding metal bar method for aligning and device

The invention belongs to a kind of high-strength alloy Steel Bar During (yield limit is 1200MPa) method for aligning and device that adopts the cross feeding mode.

Produce the common metal bar straightener that uses at present both at home and abroad, mainly by material toggling mechanism, feed mechanism, the inlet guide and guard, straightener is formed, all adopt vertical enter material way (see figure 6), be that metal bar is transported in first pair of smoothing roll pass along the aligning centerline direction by feed mechanism, its smoothing roll pass (roll gap) has all been set up before work in advance, no longer adjust during work, be to pass through screw mandrel, screw is adjusted---and screw and slide block link, the roller seat of smoothing roll is fixed on the slide block by screw, when driving the rotation of (motor-driven or handwheel drive) screw mandrel, screw drives slide block and moves up and down, move up and down thereby drive smoothing roll, realize adjustment smoothing roll pass (roll gap).These conventional method for aligning and device exist some shortcoming, because, enter in the pass (roll gap) of the smoothing roll of setting up in advance 1,2 in order to make bar, feed mechanism 31 and inlet guide and guard 30 must be set in straightener the place ahead; Bar 22 to be aligned must be transported to smoothing roll 1,2 pass roll gap along the aligning center line by feed mechanism 31) in, the feed mechanism of using mainly contains roller bed type, steel-pushing type, pinches three kinds of roll-types at present, its course of work is such: bar 22 to be aligned is pushed on the feed mechanism 31 by material toggling mechanism 21 earlier, be transported in the pass (roll gap) of smoothing roll 1,2 by feed mechanism 31 then, that is to say that straightener and feed mechanism are what to separate, straightener only plays the aligning effect, feeding is finished by another set of mechanism, therefore exists such shortcoming;

(1) bar is difficult for entering into accurately, reliably smoothing roll 1,2 passes (roll gap).Because, one section longer distance is arranged between feed mechanism and the straightener, (generally greater than 1.5M), and the bar before the aligning is sinuate, when feed mechanism 31 carries bar to advance, the bar head often departs from aligning center line and sideslip or is obstructed, can't enter into the smoothing roll of having set up 1 exactly, in 2 passes (roll gap), the bar bending must be serious more, it is sent in first pair of smoothing roll pass just difficult more, often will carries out repeatedly feeding by manual intervention, enter into smoothing roll 1 up to bar, till in 2 passes (roll gap), this has not only destroyed rhythm of production, has reduced productivity ratio, has increased working strength of workers again, also make when the bigger bar of aligning flexibility, the hope that production process is undertaken by the programme-control automation is difficult to realize.

(2) destroy the bar surface, produce big noise.The smoothing roll of having set up for bar is entered 1, in 2 passes (roll gap), be provided with inlet guide and guard 30 between feed mechanism 31 and the straightener again, because the bar before the aligning has to a certain degree crookedly, the opening degree of inlet guide and guard 30 will leave certain surplus, so that bar passes through smoothly, but, in case bar enters into smoothing roll 1, in 2 passes (roll gap), just begin rotation, get rid of and squeeze into mouthful guide and guard, bar bending serious more, aligning speed is fast more, get rid of and beat just severely more, the bar surface is bruised, and influences the bar surface quality, and produce bigger noise, cause environmental pollution.

(3) easily cause the person and equipment breakdown.Bar in a single day enter into smoothing roll 1,2, pass (roll gap), just begin rotation, get rid of inevitably and squeeze into mouthful guide and guard, cause the wearing and tearing and the damage of inlet guide and guard, equipment breakdown takes place.When bar advances, if head has departed from the aligning center line, in the time of can not being nipped by smoothing roll 1,2, to handle by the workman, till bar is nipped by smoothing roll 1,2, yet, bar is in case nipped by smoothing roll 1,2, just begin rotation, the workman hides too late sometimes and is beaten, and causes personal injury.

(4) because the smoothing roll pass is set up before work in advance, and when bar was nipped by smoothing roll 1,2, the bar head often was forced out irregular corner angle, and such end is cut sometimes, causes crop loss, has reduced lumber recovery.

World's strengthening round section technology is devoted to improve flattening precision at present, circularity, surface quality and installation level, as the described tube straightener for pipe of patent documentation CN1085139,11 smoothing rolls are arranged, the first six roller becomes opposed type to arrange, five rollers in back become alternating expression to arrange, moving up and down of smoothing roll, be to rotate by the motor-driven screw mandrel, drive screw and roller frame move up and down realization, before aligning tubing, set up in advance, still adopt vertical enter material way, its smoothing roll adopts the paired and staggered arrangement form that mixes mutually, is flattening precision and the circularity in order to improve tubing.The described continuous straightening method of patent documentation EP431775 and for example, its straightener has ten smoothing rolls, become opposed type to arrange, smoothing roll pass (roll gap) was also set up by screw mandrel, screw before aligning tubing, and adopt vertical pan feeding method, just in the lower roll of first pair of smoothing roll, be provided with hydraulic means, damaged by pressure by smoothing roll, reduce crop loss to avoid the tubing end.The described tube straightener for pipe of patent documentation US3911708 and for example adopts the method for aligning of multiple roll group, only is applicable to the tubing that aligning is long, and is provided with hydraulic cylinder and driving parts such as gear and screw mandrel, complex structure in its top roll.

Above-mentioned several straighteners do not overcome the shortcoming of conventional straightener fully.

Purpose of the present invention just provides a kind of ten roller high-strength alloy Steel Bar During straighteners that feed mechanism and inlet guide and guard need not be set, adopt cross feeding mode simple in structure, to improve security.

The object of the present invention is achieved like this, straightener is made up of flush mechanism, material toggling mechanism, straightener, metal bar is after flush in the flush mechanism, by material toggling mechanism with its along perpendicular to the aligning centerline direction, directly push on the upper surface of the roller 2 in the straightener, the roller seat of the roller 1 in the straightener directly is associated on the piston rod of hydraulic cylinder, the piston rod stroke is 100～400mm, distance between the first pair of smoothing roll and the second pair of smoothing roll is 550mm, and all the other each be 480mm to the distance between adjacent smoothing roll; Bar is after flush in the flush mechanism, and its head is in by first pair of smoothing roll center and the plane perpendicular to the aligning center line; Motor 16 drives screw mandrel 13 rotations, and the roller 3, roller 4, roller 5, roller 7, roller 8, the roller 9 that drive respectively in the straightener move up and down, and roller 2, roller 6, roller 10 do not move up and down.

Cross-roll straightening machine adopts rotation recurvation aligning principle continuously, in the aligning process, smoothing roll makes roundwood form needed recurvation curvature in the smoothing roll pass to the roundwood application of force, the longitudinal fiber of its excircle has passed through ascending, descending again elastic-plastic deformation and must aligning, this is the aligning effect of straightener.In addition, initiatively drive the roundwood motion of spinning during the smoothing roll rotation, promptly drive roundwood and rotate again when advancing, this is the feeding effect of straightener.The present invention has utilized the initiatively feeding effect of smoothing roll, with bar to be aligned 22 after flush on the uniform equipment 25, by material toggling mechanism 21 with its along perpendicular to the aligning centerline direction, directly push smoothing roll 2 (being in smoothing roll 1,2 roll gap) to upper surface, and the roller seat of smoothing roll 1 piston rod direct and hydraulic cylinder links, do not have other any driving parts such as gear, worm gear, screw, simple in structure, this also is one of difference with patent US3911708.The piston rod stroke is 100～400MM, and first pair of smoothing roll also is feeding roller, does not have feed mechanism and inlet guide and guard before the machine, and is so both safe and reliable, simple in structure again.

The invention will be further described in conjunction with the accompanying drawings.

Accompanying drawing 1: straightener appearance.

Accompanying drawing 2: roll-separating mechanism and the signal of aligning state.

Accompanying drawing 3: material toggling mechanism material toggling process signal.

Accompanying drawing 4: the course of action of roller 1 and the bar position signal in first pair roller.

Accompanying drawing 5: the aligning center line of straightener and the signal of pan feeding direction.

Accompanying drawing 6: the aligning center line of conventional straightener and the signal of pan feeding direction.

As shown in Figure 1 and Figure 2, in the first couple of straightener aligning roller, roller 2 is not mobile up and down, Gap values between rollers is definite by moving up and down of roller 1, and the roller seat of roller 1 directly and the work of hydraulic cylinder 15 The plug bar links, and the piston rod stroke is 100～400MM, by solenoid directional control valve control hydraulic oil Flow to, piston rod moves up and down, thereby band action roller 1 moves up and down. This straightener Enter the material method just as Fig. 3, Fig. 4, shown in Figure 5, because 22 of bars to be aligned Section is uneven, can accurately be placed on the upper table of roller 2 in order to make the bar head when entering to expect The best position of face need be flush on uniform equipment 25 before aligning, is placed on then the material frame On 23; Roller 1 rises under the drive of piston rod fast, when roller 1 is raised to highest order and puts, dials Roundwood to be aligned 22 is transferred in material toggling cylinder 24 actions in the material mechanism 21, and it is tumbled To the upper surface of roller 2 and in the protective sleeve 20, then, the electromagnetic switch valve events makes hydraulic pressure The hydraulic oil flow direction in the cylinder changes, and roller 1 is under pressing fast under the drive of piston rod, and this moment is excellent Material just in the roll gap of roller 1, roller 2, is equivalent to bar and is nipped by roller 1, roller 2, and bar exists Initiatively align and do the spiral motion under the driving of roller 2, be fed in the aligning roller pass of back, Roller 1, roller 2 have played the effect of feeding roller at this moment, when bar is sent to the back by roller 1, roller 2 Aligning roller pass in the time, roller 1, roller 2 again with other the aligning roller together, bar is applied must The deformation force of wanting makes bar produce required recurvation curvature and elastic-plastic deformation, at this moment, and roller 1, roller 2 has played again the effect of aligning roller, and namely first pair roller of this straightener is at aligning Roller is again feeding roller, has played the dual effect of aligning and feeding. When the bar tail end leaves roller 1, during roller 2, solenoid directional control valve moves again, hydraulic oil in the hydraulic cylinder is changed flow to, and drives Action roller 1 rises again fast, and the material toggling cylinder 24 in the material toggling mechanism moves again, with next root rod Material pushes on the upper surface of roller 2 and in the protective sleeve, then, roller 1 is pressed lower more fast, so follows Ring makes bar enter into accurately, reliably aligning roller pass, makes production process reliably Undertaken by the programme-control automation, fundamentally overcome the conventional straightener that vertically enters material Shortcoming.

Straightener shown in Figure 1 is an embodiment of the present invention, ten smoothing rolls are wherein arranged, become opposed type to arrange, roller 1, roller 5, roller 6 is a driven roll, all the other each rollers are drive roll, distance between the first pair of smoothing roll and the second pair of smoothing roll is 550MM, all the other each be 480MM to the distance between adjacent roller, straightener the place ahead does not have feed mechanism and inlet guide and guard, adopt the cross feeding mode, both bar was after flush on the uniform equipment 25, by material toggling mechanism 21 with it along perpendicular to the aligning centerline direction, directly dial on the upper surface of smoothing roll 2, the top roll (being roller 1) in the first pair of smoothing roll links with the piston rod of hydraulic cylinder, being driven to move up and down by hydraulic cylinder piston rod (does not have gear, worm gear, other any driving parts such as screw mandrel), the piston rod stroke is 100～400MM.In the certain specification scope, yield limit is the high-strength alloy Steel Bar During of 1200MPa, can both in the pass that five pairs of smoothing rolls form, obtain required recurvation curvature and elastic-plastic deformation, obtain higher flattening precision (straight degree can reach 0.088 ‰), and don't produce face crack or rectify disconnected phenomenon, this method for aligning and device have overcome the shortcoming of the conventional method for aligning of vertical pan feeding, it is reliable to have pan feeding, handling safety, the flattening precision height, advantages such as surface quality is good, and be equipped with computer control system, has higher installation level, for modern production and management provide advantage.

Claims (3)

1, a kind of metal bar method for aligning and device that adopts the cross feeding mode, it is characterized in that: straightener mainly is made up of flush mechanism, material toggling mechanism, straightener; Metal bar is after flush in the flush mechanism, by material toggling mechanism with its along perpendicular to the aligning centerline direction, directly dial on the upper surface of roller 2 of straightener, the roller seat of the roller 1 in the straightener directly is associated on the piston rod of hydraulic cylinder, and the piston rod stroke is 100～400mm; Distance between the first pair of smoothing roll and the second pair of smoothing roll is 550mm, and all the other each be 480mm to the distance between adjacent smoothing roll.

2, according to the metal bar method for aligning and the device of right 1 described cross feeding mode, its feature also is: bar is after flush in the flush mechanism, and its head is in by first pair of smoothing roll center and the plane perpendicular to the aligning center line.

3, according to right 1 described straightener, its feature also is: the roller 1 of straightener, roller 5, roller 6 are driven roll, and all the other each rollers are drive roll; Motor-driven screw mandrel rotation drives roller 3, roller 4, roller 5, roller 7, roller 8, roller 9 respectively and moves up and down, and roller 2, roller 6, roller 10 do not move up and down.

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