KR101169651B1 - Straightener - Google Patents

Abstract

It simplifies the shape of the guide bar facing and effectively uses it.

The straightener has a space | interval S opened in the direction orthogonal to the line which connected the axis line of each straightening roll 12, 14 in the surface orthogonal to a conveyance path between the straightening rolls 12 and 14 which face up and down. The pair of guide bars facing 30 and 30 for guiding the workpiece W are formed in a substantially rectangular flat plate shape, respectively, and are installed in the inlet region and the outlet region of the workpiece W on both straightening rolls 12 and 14, respectively. do. In addition, each guide bar facing 30 is arrange | positioned inclined with respect to the feed surface PL along the opening direction of space | interval S so that it may not interfere with both calibration rolls 12 and 14. As shown in FIG. In the state where the guide surface 32 of each guide bar facing 30 faces in parallel with the feed path with the gap S therebetween, the guide bar facing 30 is free to move forward and backward in a straight line along the opening direction of the gap S with respect to the feed path. have.

Description

Calibrator {STRAIGHTENER}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a calibrator for straightening a straight line by passing a workpiece such as a circular rod or steel pipe with twisting or bending between a pair of straightening rolls.

The so-called circular bar straightener is widely used as a means for appropriately correcting the torsion, bending, etc. generated in the workpiece in a rod-like material (hereinafter referred to as a workpiece) such as a circular rod or a steel pipe. The circular bar straightener is a pair of straightening rolls 12 and 14 positioned vertically and intersected at a necessary angle with respect to the feed path, with the horizontal feed path of the workpiece W interposed therebetween as schematically shown in FIG. Equipped with. The upper and lower straightening rolls 12 and 14 are rotationally driven in a predetermined direction by driving means not shown in the drawing, and a pair of material guide members (hereinafter referred to as "guide bar facing") on both sides of the conveying path. 16 and 16 are provided horizontally, respectively (refer patent document 1). In the process of forcibly passing the workpiece W between the two straightening rolls 12 and 14, the bending and the like are corrected, and the guide bar facings 16 and 16 disposed to face each other smoothly guide the workpiece W. Is done.

Each guide bar facing 16 is installed in a direction along the conveyance path and fixed to the front and rear surfaces of the guide bar 18 which has a long rectangular shape. The guide bar facings 16 and 16 function to guide the workpiece W in the correct conveying direction during the calibration operation, but the guide surface 16a is in contact with the workpiece W during the guiding operation. The contact with the processing material W causes wear over time, and ultimately the original guide function is impaired. For this reason, as the guide bar facings 16 and 16 wear out, it is necessary to remove it from the guide bar 18 and replace it with new facings 16 and 16 frequently, which causes a high running cost.

Therefore, the guide bar 18 is configured to be capable of moving forward and backward in a direction intersecting the feed path by a suitable moving and moving mechanism (not shown in the drawing), and the guide bar 18, 16 is subjected to the progress of wear of the guide bars facing 16 and 16. By moving 18 in a direction intersecting the feed path, it is possible to maintain the relative relationship between the facings 16 and 16 and the workpiece material W to secure the guide function.

Patent Document 1: Japanese Unexamined Utility Model Publication No. 6-39217

[Technical problem to be achieved]

By the way, the said both straightening rolls 12 and 14 are arrange | positioned so that the circumferential surface of the trunk | drum may be formed in concave shape (north shape) along the axial direction, and the axis line may cross | intersect at a predetermined angle. That is, in the roll center portion where the axes of both straightening rolls 12 and 14 intersect, the straightening rolls 12 and 14 are horizontally open without protruding to the other straightening rolls 14 and 12 with respect to the feed surface PL of the workpiece W. Although S is provided (refer FIG. 9), the upper and lower one of the straightening rolls 12 and 14 protrudes with respect to the feed surface PL at the edge part of the correction rolls 12 and 14 (refer FIG. 10 (a)). For this reason, the guide bar facings 16 and 16 simply interfere with any one of the upper and lower calibration rolls 12 and 14 by simply inserting the guide bar facings 16 and 16 in the horizontal direction S in the horizontal direction with respect to the feed path. Therefore, it is possible to avoid interference with both straightening rolls 12 and 14 by forming a three-dimensionally complex shape that is curved along the circumferential surfaces of the straightening rolls 12 and 14 that interfere with the guide bars facings 16 and 16. As a result, the complicated shape of the guide bar facing 16 increases the cost of itself and the weight is heavy.

In addition, as described above, in the configuration in which the guide bar 18 moves forward toward the feed path according to the progress of wear of the guide bar facing 16, even when the guide bar facing 16 is moved up and down according to the advance of the guide bar facing 16, The wear allowance of the guide bar facing 16 cannot be taken large by interfering with one straightening roll 12, 14 (see Fig. 10 (b)). Therefore, although the dimension of the direction crossing with the conveyance path of the guide bar facing 16 remains large, the replacement work of the guide bar facing 16 must be frequently performed. In addition, the guide surface 16a in contact with the workpiece W in the guide bar facing 16 is displaced with respect to the workpiece W as the guide bar facing 16 moves forward, so that the guide function is deteriorated. In addition, the surface of the workpiece W may be scratched, which is a problem in calibration quality.

The workpiece W is conveyed while being rotated in a predetermined direction by rotation of both of the straightening rolls 12 and 14 and tries to move in the inclined direction, thereby applying a force to the guide bars facings 16 and 16. In other words, since the wear progresses locally at the inlet side of one guide bar facing 16 and the outlet side of the other guide bar facing 16, these guide bar facings 16 and 16 cannot be effectively used as a whole, and the difficulty of shortening the service life is reduced. It is pointed out.

That is, the present invention has been proposed in order to solve these problems properly in view of the above problems inherent in the conventional calibrator according to the prior art, and a calibrator capable of effectively preventing the interference between the guide bar facing and the calibration roll and effectively using the guide bar facing. The purpose is to provide.

[Configuration of Invention]

In order to overcome the above problems and achieve the desired object, the calibrator according to the present invention is installed to face each other at a predetermined angle with respect to the conveying path, while facing up and down with the conveying path of the material to be interposed therebetween, and at least one side. A pair of straightening rolls formed in a drum shape in which the circumferential surface of the concave shape is concave, and are disposed to face each other along the feed path of the workpiece in a relationship intersecting with the opposite directions of the straightening rolls, and guide the workpiece. And a pair of guide bar facings, each having a gap open between the two straightening rolls in a direction orthogonal to a line connecting the axes of the straightening rolls on a surface orthogonal to the feed path. In the braces,

The pair of guide bar facings are each formed in a substantially rectangular flat plate shape and are respectively installed in the inlet region and the outlet region of the workpiece in each of the straightening rolls. It is disposed inclined with respect to the horizontal conveying surface of the workpiece material along the opening direction of the gap so as not to interfere, the guide surface of the workpiece in each guide bar facing the conveying path with the interval therebetween In the state facing in parallel with the guide bar facing is characterized in that it is configured to move forward and backward linearly along the opening direction of the gap with respect to the feed path.

1 is a plan view showing a calibration roll of a calibrator according to a preferred embodiment of the present invention.

Fig. 2 is a front view showing a calibration roll of the calibrator of the embodiment.

3 is a plan view showing the material guide means of the straightener of the embodiment;

Fig. 4 is a side view showing the material guiding means of the calibrator of the embodiment, in which the dashed-dotted line is a cross section along the line XX in Fig. 1, the dashed-dotted line is a cross section on the line YY in Fig. 1, and the dashed line is the ZZ line in Fig. 1. The cross section about is shown, respectively.

Fig. 5 (a) shows a cross sectional view taken along the line X-X of Fig. 1, (b) shows a cross sectional view taken along the line Y-Y of Fig. 1, and (c) shows a cross sectional view taken along the line Z-Z of Fig. 1.

6 is a plan view showing the material guide means of the calibrator according to the modification.

Fig. 7 is a side view showing the material guide means of the straightener of the modification.

8 is a plan view showing a calibration roll in a conventional calibrator.

9 is a cross-sectional view taken along the line A-A of FIG.

Fig. 10 is a cross sectional view taken along the line B-B in Fig. 8, (a) shows the state at the start of the use of the guide bar facing, and (b) shows the state during the use of the guide bar facing. In addition, four X marks in (b) represent an interference site.

Best Mode for Carrying Out the Invention

Next, a suitable example of a calibrator according to the present invention will be described below with reference to the accompanying drawings. In addition, for the convenience of description, the same elements as those of the calibrator shown in FIGS. 8 to 10 are denoted by the same reference numerals and detailed description thereof will be omitted.

[Example]

As shown in Fig. 1 or Fig. 2, a straightener as a means for properly correcting warping or bending occurring in the workpiece W in a processing step of the workpiece W such as a circular bar or steel pipe. A pair of straightening rolls 12 and 14 are provided on the upper and lower sides with a horizontal feed path of W interposed therebetween. Each of the straightening rolls 12 and 14 intersects each axis at a predetermined angle (about 30 degrees from the feeding path in this embodiment) with respect to the feed path of the workpiece W as shown in FIG. And are also supported to cross each other in an X shape. Further, the lower straightening roll 12 of the embodiment is formed in a drum shape in which the circumferential surface of the body is concave in the axial direction, and the upper straightening roll 14 is also concave in the axial direction. It is formed into a drum shape (north shape). The upper and lower straightening rolls 12, 14 are conveyed surfaces as horizontal reference planes when the upper surface of the body portion of the lower straightening roll 12, on which the intersections of the axes are positioned on the conveying path, and which the workpiece material W is placed, conveys the workpiece material W. It is in PL. Each of the straightening rolls 12 and 14 is rotationally driven in a predetermined direction by a roll driving mechanism not shown in the drawing, and the work material W inserted in the pressurized state between the two straightening rolls 12 and 14 is the straightening rolls 12 and 14. It is conveyed while rotating in a predetermined direction according to the rotational direction of. When the lower straightening roll 12 is used as a reference, the upper straightening roll 14 is capable of adjusting the displacement in the vertical direction corresponding to the diameter of the workpiece W.

An interval S opened in a direction orthogonal to the line connecting the axes of the respective calibration rolls 12 and 14 is formed between the two straightening rolls 12 and 14 arranged so as to face up and down (Fig. 5). Reference). In other words, since the outer periphery of each of the straightening rolls 12 and 14 is protruded to the other straightening rolls 14 and 12 on the side where the axis line is away from the feeding path, there is a difference between the two straightening rolls 12 and 14 on the side. A gap S opened in the inclined direction with respect to the horizontal transfer surface PL of the workpiece W is formed.

As shown in Fig. 3, the straightener is provided with a pair of holders 24 and 24 (only one shown) facing each other symmetrically with the transfer path of the workpiece W interposed therebetween. The holder 24 is pivotally supported to open and close freely by the corrector body, and functions as a so-called door body. The straightener includes a pair of struts 20 and 20 (only one shown) installed vertically, and a cylindrical support member 26 having a holder 24 made of a rectangular plate on the strut 20 on its right side is installed at one end in the longitudinal direction. It is pivotally supported to rotate through. The support member 26 is configured to be freely slidable in the axial direction with respect to the support 20, and is configured to allow height adjustment of the holder 24 in the vertical direction by a lifting mechanism not shown in the drawing. The holder 24 is opened and closed by a holder opening and closing mechanism not shown in the drawing, and is normally closed.

The holder 24 is basically provided with a guide bar facing 30, a guide bar 34 and a forward and backward movement mechanism 40, and is provided with a material guide means 28 for guiding the workpiece W along a feed path. On the inner surface of the holder 24 toward the conveying path, a plurality of guide bars 34 (two in the embodiment) having a horizontally long rectangular shape as shown in FIG. The guide bar facing 30 is fixed to the front end surface of each guide bar 34 so that attachment and detachment are possible. The guide bar facing 30 is provided in two front and rear sides of the conveying path of the workpiece W along the conveying path, so that the pair of guide bar facings 30 and 30 face each other with the conveying path therebetween. By supporting the workpiece W, smooth guidance of the workpiece W is achieved (see Fig. 1). In other words, the holders 24 and 24 of the embodiment are provided with two material guide means 28 and 28, respectively. The guide bar 34 is capable of linearly moving forward and backward in a direction intersecting the feed path (direction along the opening direction of the gap S) by an appropriate forward and backward movement mechanism 40 installed on the holder 24, so that the diameter or guide of the workpiece W The guide face 32 of the guide bar facing 30 may be properly positioned with respect to the workpiece W according to the wear of the bar facing 30.

The guide bar facing 30 is formed of a substantially rectangular flat plate made of cast iron or the like softer than the workpiece W so that the workpiece W does not have a flaw. The guide bar facing 30 is disposed so that the long side extends in the direction along the feed path. (See Figure 1). At each corner of the corner which is the inlet side or the outlet side of the straightening rolls 12 and 14 in each guide bar facing 30, tapered 31 inclined away from the conveying path as the inlet side or the outlet side is formed is formed. Appropriate guidance on the transport path of the workpiece W and the corners of the corners of the guide bar facing 30 ensure that the workpiece W is not damaged.

The pair of guide bar facings 30 and 30 are provided along the areas of the feed paths on both straightening rolls 12 and 14, respectively, and the feed paths are interposed between the inlet side areas of the straightening rolls 12 and 14, respectively. The first guide bar facing 30a and the second guide bar facing 30b, which are arranged to face each other, are provided, while the third guide bar facing 30c and the fourth guide, which are arranged to face each other with the transfer path therebetween, are provided in the exit area. Bar facing 30d is installed. That is, the straightening rolls 12 and 14 are divided into two regions of the inlet side and the outlet side of the conveying path, and a pair of guide bar facings 30 and 30 arranged to face each other with the conveying path interposed therebetween. The workpiece W is configured to guide each.

Each guide bar facing 30 is placed on the horizontal conveying surface PL of the workpiece W along the opening direction of the gap S formed by the lower straightening roll 12 and the upper straightening roll 14 so as not to interfere with both of the straightening rolls 12 and 14. Each guide bar facing 30 is linearly inserted in the interval S along the opening direction of the interval S, and the guide bar facing is arranged while being inclined by a predetermined angle (arrangement angle) θ with respect to the transport path as an axis. A guide surface 32, which is a shear surface of 30, faces parallel to the conveying path and guides and supports the workpiece W along the conveying path. In addition, the paired guide bar facings 30 and 30 are located on the same inclined surface. That is, in the straightening rolls 12 and 14 which are located up and down and intersect with the conveyance path, in the region where the upper surface of the body portion of the lower straightening roll 12 is ubiquitous on the outer side (direction away from the conveying path) with respect to the upper straightening roll 14, the guide In the area where the bar facing 30 extends obliquely upward and the lower surface of the body portion of the upper straightening roll 14 is ubiquitous to the outside (direction away from the feed path) with respect to the lower straightening roll 12, the guide bar facing 30 is It is arranged obliquely extending downward.

In the embodiment, as shown in Fig. 4, in the inlet region of the straightening rolls 12 and 14, the first guide bar facing 30a at an interval S between both straightening rolls 12 and 14 opened obliquely downward to the left. Is inserted obliquely downward to the left as is away from the feed path, and the second guide bar facing 30b is symmetrically opened with this and the feed path in between, and is open obliquely upward to the right. The gap S between the rolls 12 and 14 is inserted in an inclined upward direction obliquely to the right as it moves away from the feed path, and both are disposed on the same inclined surface. Further, in the exit area, the third guide bar facing 30c is inclined downward obliquely downward to the right at an interval S between both straightening rolls 12 and 14 that are open obliquely downward to the right. As it is inserted in the state, and away from the feed path at a distance S between both straightening rolls 12 and 14, the fourth guide bar facing 30d is symmetrically opened with this and the feed path interposed symmetrically upwards to the left. It is inserted in an inclined upward direction obliquely to the left and both are disposed on the same inclined surface. The pair of guide bar facings 30a and 30b arranged in the inlet side region in the calibration rolls 12 and 14 and the pair of guide bar facings 30c and 30d arranged in the outlet side region are in a symmetrical positional relationship.

The guide bar facing 30 has both the straightening rolls 12 and 14 in consideration of the shape of each of the straightening rolls 12 and 14, the intersecting angles of both straightening rolls 12 and 14, and the width and the thickness extending with respect to the feed path of the guide bar facing 30. Placement angle θ with respect to feed plane PL is set so as not to interfere with it. It is appropriate to set the range within ± 10 ~ ± 20 degrees. The guide bar 34 constituting the material guide means 28 and the advancing and moving mechanism 40 supporting the guide bar 34 are installed in the holder 24 at an angle approximately equal to the arrangement angle of each guide bar facing 30 so as to correspond to the guide bar facing 30. With respect to the gap S therebetween, it is possible to move back and forth linearly toward the workpiece material (direction intersecting with the feed path) W (see Fig. 4). That is, when the guide bar facing 30 is advanced, the guide surface 32 of the guide bar facing 30 which faces in parallel to the conveying path is moved while maintaining a relative positional relationship (parallel relationship) with the workpiece W. Further, each material guide means 28 is provided with position detection means 58 for detecting the position of the guide surface 32 facing the transfer path in the corresponding guide bar facing 30.

Here, when the workpiece W is conveyed between both calibration rules 12 and 14, the workpiece W is rotated in a predetermined direction according to the rotation direction of the calibration rolls 12 and 14, and tries to move in the inclined direction on the transfer surface PL from the transfer path (Fig. See the thick line arrow of 1). That is, in one guide bar facing 30 corresponding to the movement direction by the rotation of the workpiece W, the degree of sliding friction with the workpiece W is higher than that of the other guide bar facing 30 that is paired. Therefore, in the embodiment, it is located on the inlet side of the workpiece W with respect to the straightening rolls 12, 14, and is located on the first guide bar facing 30a corresponding to the moving direction by the rotation of the workpiece W and on the outlet side. The width of the guide surface 32 of the third guide bar facing 30c corresponding to the moving direction by the rotation of the material W is in a direction along the feed path compared to the guide surface 32 of the other guide bar facing 30b and 30d, respectively. It is formed to be wider. Therefore, in the plan view of Fig. 1, the guide bar facings 30 and 30 of the pair adjacent to each other along the transfer path are not divided into the structure of dividing the support sharing area of the transfer path from the center of the calibration rolls 12 and 14, but to the inlet side or the outlet side. It is biased.

As shown in Fig. 3, the forward and backward movement mechanism 40 basically includes a screw shaft 42 which rotates forward and backward in conjunction with the driving means 50, and a nut 44 which is screwed to the screw shaft 42 and connected to the guide bar 34. The so-called screw feed mechanism configured is adopted. The retreat movement mechanism 40 is inserted into the outer casing 46 of the guide bar 34 so that the retraction can be freely moved, and the nut 44 on the rear end of the guide bar 34 (the opposite side of the connection with the guide bar facing 30). The rotation is limited. In addition, the casing 46 passes through the screw shaft 42 so as to rotate freely in a state in which the shaft is aligned. One end thereof is screwed into the nut 44, and the other screw shaft gear 48 fixed to the other end is a hydraulic motor. Is engaged with the drive gear 52 fixed to the drive shaft of the drive means 50 of. On the circumferential surface of the guide bar 34 inserted into the casing 46, a pair of key grooves 54, 54 extending in the direction intersecting the feed path are formed concave in a symmetrical position, and the key 56 fixed to the casing 46 in each key groove 54. Each of these is combined to prevent rotation of the guide bar 34 and to allow the movement of the guide bar 34 in the direction intersecting the feed path. In other words, by rotating the drive means 50, the screw shaft 42 rotates in a predetermined direction through both gears 48 and 52, and the inner circumferential surface of the casing 46 is moved under the screwing action of the screw shaft 42 and the nut 44. Therefore, the guide bar 34 is moved forward and backward in a direction crossing the transfer path to adjust the position of the guide bar facing 30 in the transfer path. In addition, the rotation stop mechanism of the advance movement mechanism 40 which consists of the said key groove 54 and the key 56 may be the structure which forms a key groove in the casing 46, and fixes a key to the guide bar 34 correspondingly.

Action of Example

Next, the operation of the calibrator according to the embodiment will be described. In the calibration work of the workpiece W, the calibration rolls 12 and 14 in the upper and lower calibration rolls 12 and 14 and the guide bar facing 30 of each material guide means 28 are adjusted and supported in predetermined positions. The workpiece W passes between the surfaces (circumferential surface of the body). In this process, the calibration rolls 12 and 14 make the necessary correction while giving rotation to the workpiece W, and the paired guide bar facings 30 and 30 limit the lateral vibration of the workpiece W, and transfer it. Guide the machine to correct the torsion or bending of the whole workpiece W.

Here, both the straightening rolls 12 and 14 arranged to face up and down are arranged in an X-shape with their axes intersecting with each other, and both straightening rolls 12 and 14 are formed in a drum shape which is concave. , The space S formed by 14 indicates that the opening direction is in the inclined direction along the feed path with respect to the feed plane PL in the inlet region (see Fig. 5 (a)) and toward the intersection (center) of the roll axis. Therefore, it gradually faces in the horizontal direction (see FIG. 5 (b)), and faces in the inclined direction symmetrical with the inlet region as it faces from the center to the outlet region (see FIG. 5 (c)). As described above, the gap S formed by the upper and lower straightening rolls 12 and 14 is gradually changed in the opening direction by the region along the feed path.

In the calibrator according to the present invention, a pair of guide bar facings 30 and 30 are provided in the inlet region and the outlet region of the workpiece W in both of the straightening rolls 12 and 14, respectively. In consideration of the width according to the conveying path of the guide bar facing 30 and the opening direction of the gap S, the inclined direction by a predetermined arrangement angle θ with respect to the horizontal conveying surface PL of the workpiece W as an axis By arranging in an inclined state, the guide surface 32 is brought close to the conveying path by inserting it linearly in the gap S along the opening direction of the gap S without interfering with both calibration rolls 12 and 14. The guide surface of the guide bar facing 30 formed in the shape of a substantially rectangular flat plate by arranging each guide bar facing 30 at an inclination with respect to the feed surface PL along the opening direction of the said gap S so that it may not interfere with both calibration rolls 12 and 14 in this way. It is possible to face 32 parallel to the feed path with the gap S therebetween. In other words, each of the guide bar facings 30 does not have to be a three-dimensionally complicated shape in consideration of interference with both the straightening rolls 12 and 14, but can be a simple shape having a substantially rectangular flat plate shape. Therefore, it is easy to form the guide bar facing 30 itself, and also reduce the processing effort and manufacturing cost. In addition, since the guide bar facing 30 can be reduced in weight, handling can be improved in replacement work and the like.

Each guide bar facing 30 for guiding the workpiece W according to the progress of the calibration operation wears down and the guide function of the workpiece W is deteriorated, so that the guide is fixed by a predetermined amount based on the detection of the position detecting means 58 or according to time. The bar facing 30 is configured to be advanced by the forward and backward movement mechanism 40 so that the workpiece W is always guided in an appropriate state. In addition, the transfer path is divided into a front and rear area by a pair of guide bar facings 30 and 30, respectively, and each guide bar facing 30 is configured to move forward and backward by the forward movement mechanism 40, and thus guide bars for guiding each area. There is an advantage that the position of the guide bar facing 30 with respect to the conveying path can be closely controlled according to the worn state of the facing 30.

Since each of the guide bar facings 30 is formed in a substantially rectangular flat plate shape and is linearly moved by the forward and backward movement mechanism 40, the guide bar facings 30 are moved forward without interfering with both calibration rolls 12 and 14 even when the guide bars facing 30 move forward. It is possible to set the friction allowance as much as possible in the range of the length of the guide bar facing 30 in the direction intersecting the path, so that the life of the guide bar facing 30 can be lengthened to reduce the frequency of replacement of the guide bar facing 30. Further, since the guide bar facing 30 is configured to move forward and backward linearly by the forward and backward movement mechanism 40, the relative positional relationship between the guide surface 32 of the guide bar facing 30 and the workpiece W set in a parallel position relationship is the guide bar. The workpiece W is always guided to an appropriate state because there is no change in the forward and backward movement of the facing 30 and there is no center shift. Therefore, according to the calibrator according to the embodiment, it is possible to continuously perform a calibration operation with high precision.

In addition, the two guide bar facings 30 and 30 are arranged along the transfer path, and when viewed in a plan view, the transfer paths corresponding to the calibration rolls 12 and 14 in the pair of neighboring guide bar facings 30 and 30 are defined by the inlet region and the outlet. The guidance of the workpiece W is divided by dividing into side regions. That is, since one guide bar facing 30 corresponding to the moving direction by the rotation of the workpiece W is abrasion proceeds earlier than the other guide bar facing 30 which is paired, each guide bar facing 30 is changed according to the progress of wear. It can be exchanged appropriately. In addition, the guide surface 32 of one guide bar facing 30 corresponding to the movement direction by the rotation of the workpiece W is wider in the direction along the feed path than the guide surface 32 of the other guide bar facing 30 that is paired. Therefore, the service life of one guide bar facing 30 having a large sliding contact degree with the workpiece W can be extended, and the workpiece W can be guided appropriately.

In addition, the guide bar facing 30, which is required to be replaced due to abrasion, is rotated backward and backward, and the guide bar facing 30 is evacuated from the transfer path and the calibration rolls 12 and 14, and then the By rotating the holder 24 outward, the guide bar facing 30 is pulled outward along the holder 24. Then, the guide bar facing 30 can be easily replaced by removing the guide bar facing 30 from the front end face of the guide bar 34 and replacing it with a new one. In this replacement operation, the guide bar facing 30 is lighter, so the replacement operation is convenient.

As described above, since the advance movement mechanism 40 of the embodiment using the screw transfer mechanism includes a rotation stop mechanism composed of the key groove 54 and the key 56 coupled to the key groove 54, the guide bar in the advance movement of the guide bar 34. 34 does not rotate, the interference with the calibration rolls 12 and 14 of the guide bar facing 30 can be prevented, and the guide surface 32 can always be directed in a parallel relationship with respect to the feed path.

In the embodiment, the upper and lower straightening rolls 12 and 14 are both formed in a drum shape in which the body circumferential surface is concave in the axial direction, but the body circumferential surface of one of the straightening rolls becomes a convex shape in the radial direction. It is also possible to apply the structure of the guide bar facing in the straightener which concerns on this invention also regarding the structure formed in the drum shape.

In addition, the retraction movement mechanism 40 which moves the guide bar facing 30 in the direction crossing the transfer path is not limited to the screw transfer mechanism, but may be a fluid cylinder such as a hydraulic cylinder or other link mechanism. .

Fig. 6 is a plan view showing the material guide means 60 provided in the holder 24 in the calibrator according to the modification, and Fig. 7 is a side view thereof. As described above, in the embodiment, the material guide means 28 including the advance movement mechanism 40 configured to automatically move the guide bar 34 by the drive means 50 such as a motor has been described. A forward and backward movement mechanism 62 capable of advancing and moving the guide bar 34 is provided. The advance movement mechanism 62 of the modification is basically composed of a screw shaft 66 which rotates forward and backward in conjunction with the handle 64, and a nut portion 68 screwed to the screw shaft 66 and fixed to the holder 24 side. A so-called screw feed mechanism is adopted. The screw shaft 66 is coupled to the rear end of the guide bar 34 (inverse side of the connecting end with the guide bar facing 30), in which a front end portion extending from the nut portion 68 is supported to move forward and backward to the casing 70. As the screw shaft 66 moves forward and backward, the guide bar 34 moves forward and backward in the direction crossing the feed path. And the guide bar facing 30 provided on the front end surface of the guide bar 34 is disposed in a state inclined in the inclined direction by a predetermined arrangement angle θ with respect to the horizontal transfer surface PL of the workpiece W, the axis of the transfer path, The guide surface 32 can be inserted close to and separated from the feed path by inserting it linearly into the said gap S along the opening direction of the gap S, without interfering with both calibration rolls 12 and 14. As shown in FIG. That is, by rotating the handle 64, the screw shaft 66 rotates in a predetermined direction, and the screw shaft 66 moves forward and backward in the direction intersecting the conveying path under the screwing action of the screw shaft 66 and the nut 68. It is possible to adjust the position of the transfer path of the guide bar facing 30 installed on the front end of the guide bar 34. In addition, in the straightener of the modified example, the direction of rotation of the straightening roll is opposite to that of the embodiment, whereby the arrangement position of the angle guide bar facing 30 is different.

Here, the material guide means 60 having guide bars facings 30a and 30c set wide in the moving direction of the workpiece W that rotates in accordance with the transfer of the workpiece W by both of the straightening rolls 12 and 14. A plurality of advance movement mechanisms 62 are provided. A pair of forward and backward movement mechanisms 62 and 62 are provided so as to correspond to the front and rear sides of the guide bar facings 30a and 30c and are spaced apart from the direction along the transfer direction. By moving forward and backward respectively, it is possible not only to advance and retreat the guide surface 32 parallel with respect to a conveyance path | route, but also to be located in the inclined state in which the anterior or back side is separated from a conveyance path | route. In this way, since the plurality of forward and backward movement mechanisms 62 and 62 are provided, not only the guide faces 32a of the guide bars facing 30a and 30c are faced parallel to the feed path, but also the guide bars facing 30a and 30a according to the progress of the calibration work. Depending on the local wear of the guide surface 32, the front and rear retreat movement mechanisms 62 can be independently retracted to adjust the guide surfaces 32 of the guide bar facings 30a and 30a to a more appropriate position with respect to the workpiece W.

According to the calibrator according to the present invention, a pair of guide bar facings are formed in a substantially rectangular flat plate shape, respectively, and are provided in the inlet region and the outlet region of the workpiece in each of the straightening rolls, respectively. The bar facings are arranged inclined with respect to the horizontal conveying surface of the workpiece along the opening direction of the gap so as not to interfere with both straightening rolls, and the guide surface of the workpiece in each guide bar facing has a gap therebetween. The guide bar pacing is configured to be freely moving forward and backward along the opening direction of the gap with respect to the feed path in parallel with the feed path, thereby simplifying the shape of the guide bar facing by avoiding the interference of the guide bar facing and the calibration roll. In addition to being able to A length in a direction intersecting the transport path of the de-bar facing it is possible to use as much as possible. In addition, one guide bar facing the movement direction by the rotation of the workpiece is formed to be wider in the direction along the feed path than the other guide bar facing in pairs, thereby reducing wear due to rotation of the workpiece. It is possible to extend the service life of locally occurring guide bar facings, and further to appropriately guide an area with a large degree of sliding contact with the workpiece material. Further, by providing a rotation stop mechanism in the advance movement mechanism for moving the guide bar facing forward and backward along the opening direction of the gap, it is possible to prevent the displacement of the position of the guide bar facing.

Claims (4)

delete delete delete A pair of straightenings which are arranged to face up and down with the transfer path of the workpiece W interposed therebetween and intersect with each other with respect to the transfer path, and are formed in a drum shape in which at least one circumferential surface is concave. A pair of rolls 12 and 14, which are arranged to face along the feed path of the workpiece W in a relation intersecting the opposite directions of the straightening rolls 12 and 14, and guide the workpiece W; Consisting of guide bar facings 30 and 30, connecting the axes of the respective straightening rolls 12 and 14 in the plane orthogonal to the feed path between the two straightening rolls 12 and 14. In the calibrator having a gap (S) opened in a direction orthogonal to one line, The pair of guide bar facings 30 and 30 are each formed in a rectangular flat plate shape and are installed in the inlet region and the outlet region of the workpiece W in both straightening rolls 12 and 14, respectively. , Each of the guide bar facings 30 with respect to the horizontal feed surface PL of the workpiece W along the opening direction of the gap S so as not to interfere with both straightening rolls 12, 14. Placed at an angle, In each of the guide bar facings 30, the guide bar facings 30 of the workpiece W face each other in parallel with the feed path with the spacing S therebetween. Freely moving forward and backward along the opening direction of the gap S with respect to the feed path, The guide surface 32 of one guide bar facing 30 corresponding to the moving direction by the rotation of the work material W is a transfer path than the guide surface 32 of the paired guide bar facing 30. Calibrator, characterized in that the width is formed in the direction along the wide .

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