KR100492010B1 - Clamping apparatus for machine tool, material transfering apparatus and linear machining apparatus comprising the same, and three-dimensional linear machining apparatus - Google Patents

Abstract

The first and second long member holding means (13, 39) are retained, and the second long member holding means (39) is provided on the side of the processing head (32) rather than the first long member holding means (13). The second long member holding means 39 is provided with a through hole 14c through which the long member 53 can pass. The first and second long member holding means are provided so as to be relatively accessible in the first direction. By holding the long member 53 by the first long member holding means 13, the long member 53 is moved by the second long member holding means 39 by moving close to the second long member holding means 39. Protrudes by a certain amount from the to the processing head portion 32 side. In this way, the three-dimensional linear processing is performed on the long member 53 by the processing head 36. As a result, free-form cutting and the like can be continuously performed on the elongated member, and mass production processing becomes easy.

Description

Clamping apparatus for machine tool, material transfering apparatus and linear machining apparatus comprising the same, and three-dimensional linear machining apparatus}

The present invention is a three-dimensional linear processing apparatus capable of free-cut line-shaped cutting by a method such as plasma cutting, gas cutting, laser cutting, or the like on a long member such as a pipe or an angle member. It is about.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamping device for a machine tool capable of clamping a workpiece such as a pipe or an angle member having various cross-sectional shapes as appropriate during machining in a machine tool.

The present invention relates to a material conveying apparatus capable of suitably conveying a workpiece in a machine tool such as a laser processing machine and a linear processing apparatus having the material conveying apparatus.

In recent years, the linear processing apparatus which can cut the cylindrical workpiece is proposed. However, when free-form surface processing is possible for long members such as pipes and angle materials, various other uses for construction arise. However, in the past, there was no device capable of continuously performing laser cutting or the like on the long member, and mass production processing was performed. It was difficult.

Moreover, conventionally, the process with respect to the workpiece of various shapes is performed by machine tools, such as plasma cutting, gas cutting, and laser cutting. In such processing, the workpiece may be gripped by a gripping means such as an appropriate clamping device to perform processing. By the way, the workpiece | work, such as a pipe and an angle material, has a so-called mold-shaped cross-sectional shape, such as L-type, I-type, and H-type, in addition to round shape. However, conventionally, the method of appropriately holding these workpieces with a heteromorphic cross-sectional shape has not been established.

Moreover, conventionally, the process by linear processing apparatuses, such as plasma cutting, gas cutting, and laser cutting, is performed. However, a method for properly and automatically conveying long workpieces with such a device has not yet been established.

The present invention has been made to solve the problems of the conventional three-dimensional linear processing apparatus as described above, the object of the present invention is to be able to continuously perform the free-cut surface cutting processing, etc. for the elongate member, 3 easy to mass-produce It is to provide a dimensional linear processing device.

The present invention has been made to solve the problems of the conventional gripping means for machine tools as described above, an object of the present invention is to provide a clamp device for a machine tool that can also properly hold a workpiece having a heteromorphic cross-sectional shape. .

The present invention has been made in order to solve the problems of the conventional material conveying apparatus as described above, an object of the present invention is a material conveying apparatus capable of properly conveying a long working material and a linear processing apparatus having the material conveying device To provide.

Other purposes of the present invention may be various, but will be understood through the detailed description and drawings described below.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, this invention has the processing head part provided with the processing head which can process in a linear shape on a free curved surface with respect to a long member, The 1st sending a long member to a said 1st direction with respect to the said processing head part In the three-dimensional linear processing apparatus which installs a raw material conveying apparatus and performs three-dimensional linear processing on the elongate member supplied to the process head part by the said raw material conveying apparatus based on a machining program, The said 1st raw material conveying apparatus is a 1st product. A first holding member holding means and a first holding member holding means, wherein the first holding member holding means is provided with a holding portion for holding the holding member in a fixed manner in the first direction, and the second holding member holding means is provided with the first holding member holding means. It is provided in the said processing head part side rather than 1st elongate member holding means, The said elongate long holding member holding means A through hole through which the member can be formed is formed, and a gripping portion is provided for movably gripping the long member in the first direction, and the first and second long member gripping means are relatively in the first direction. It is characterized by being installed so that access and separation are possible. Therefore, by holding the long member by the first long member holding means and moving in the direction of the second long member holding means, the long member can protrude from the second long member holding means to the processing head by an arbitrary amount. By the machining head, the three-dimensional line processing can be smoothly performed on the elongated member. Moreover, every time the 1st elongate member holding means is processed by a processing head, by moving relatively to a 1st direction, the three-dimensional linear process with respect to a elongate member can be performed continuously, and the three-dimensional which is easy to mass-produce It is possible to provide a linear processing apparatus.

In the three-dimensional linear processing apparatus, a second material conveying device is provided on the opposite side of the first material conveying device of the processing head portion, and the second material conveying device has third and fourth long member holding means. And the third long member holding means is provided on the processing head portion side more than the fourth long member holding means, and the third long member holding means is provided with a through hole through which the long member is penetrated. A gripping portion for gripping the member so as to be movable in the first direction is provided, and the fourth elongating member gripping means is provided with a gripping portion for gripping the elongate member in the first direction. The fourth elongate member holding means is provided so as to be relatively accessible and separated in the first direction. It is sex. Therefore, the third and fourth long member holding means can perform processing while holding the long member in the state of sandwiching the processing head, so that the occurrence of bending of the long member at the time of processing can be prevented, and the accuracy is high. Excellent processing is possible. Further, by synchronously moving in the first direction in conjunction with the first and second long member holding means, various machining of the long member can be performed, and high processing ability can be exhibited.

Moreover, the said elongate member holding means of this invention was comprised so that rotational drive was possible in the state which the rotation angle of a grip part can be controlled, and it was comprised so that it could rotationally drive in the state which gripped the said elongate member by the said holding part. Therefore, three-dimensional processing of a long member can be performed easily by rotating a grip part, controlling a rotation angle.

Further, in the present invention, the gripping portion is provided so as to be rotationally driven in synchronization with the gripping portion of the other elongate member gripping means. Therefore, by rotationally driving the gripping portion in a manner synchronized with the gripping portion of the other elongate member gripping means, it is possible to accurately and easily perform the processing involving the rotation angle control of the elongate member.

In the present invention, the gripping means is provided with a member centering means. Therefore, centering can be performed automatically by holding a long member by a member centering means.

Moreover, in this invention, the said 1st long elongate member means is provided so that a movement position is possible in the said 1st direction, and the said 2nd elongate member holding means is fixed with respect to the said processing head. Therefore, since the 2nd long member holding means can be arrange | positioned near the process head part in which a process is performed, the process part of a long member can be reliably maintained in the vicinity, and can contribute to the improvement of processing precision.

The three-dimensional linear processing apparatus is a laser processing apparatus, a plasma cutting apparatus, or a gas cutting apparatus. Therefore, various apparatuses can be employ | adopted as a three-dimensional linear processing apparatus.

In the present invention, the second and the third elongate gripping means are provided so as to be relatively accessible and separated in the first direction, and both gripping portions may contact each other in close proximity. It is done. Therefore, by holding the holding portions of the second and third long member holding means, the tip of the long member held on the side of the second long member holding means can be gripped by the third long member holding means to the minimum protruding length, Even when the long member is shortly cut in the first direction, the work can be reliably gripped even when the end portion is processed by holding the cut workpiece on the third long member holding means side.

Further, in the present invention, the gripping portion of the first long elongating member gripping means is formed to be fitted into the through hole of the second long elongating member gripping means, and the gripping portion of the fourth long elongating member gripping means grips the third elongate member. It is formed to fit in the through hole of the means. Therefore, the first and second, third and fourth elongate member gripping means can approach each other as much as possible without interfering with the gripping portions of the first and fourth elongate member gripping means, thereby minimizing the amount of gripping for processing. As a result, it is possible to process the shape in which unnecessary uncut amount is minimized, and the yield of materials can be improved.

Moreover, in this invention, the said 1st and 4th elongate member holding means are provided so that it can move synchronously to a said 1st direction. Therefore, processing can be carried out synchronously moving to a 1st direction in the state which hold | maintained the elongate member by the 1st and 4th elongate member holding means, and an accurate process can be performed, keeping the elongate member unbending.

Moreover, in this invention, the said 1st and 2nd elongate member holding means are respectively provided so that the movement position to the said 1st direction is possible. Therefore, by moving these 1st and 2nd elongate member holding means independently, more advanced and complicated processing is attained.

In addition, the clamp device for clamping the workpiece when the workpiece is machined by a machine tool has a device body, and forms a workpiece insertion portion in the device body so that the workpiece can be inserted in the axial direction of the device body, and the workpiece insertion portion In the clamping device for machine tools in which three or more clamp members are connected to each other by a synchronous moving mechanism so as to be movable in a radially synchronous manner, and a workpiece contact portion is formed in each of the clamp members so as to face the workpiece insertion portion. And the workpiece contact portions are formed such that the projection shapes parallel in the axial direction are substantially straight, and the clamp members adjacent to each other displace the workpiece contact portions in the axial direction, thereby paralleling the workpiece contact portions in the axial direction. One projection shape forms the intersection Each workpiece contact portion is movable to a position where the distance between the intersection portions formed on both sides of the workpiece contact portion in a projection shape parallel to the axial direction becomes smaller than the width of the workpiece contact portion. It is characterized in that it is arranged. In the projection shape in which each work contact part is parallel in the axial center direction, the distance between the intersections formed on both sides of the work contact part is movable to a position where the width of the work contact part becomes smaller, so that the projection shape parallel in the axial center direction The plurality of workpiece contact portions are movable in such a manner that the closing ring is formed and the size of the closing ring can be enlarged or reduced. That is, the workpiece inserted into the workpiece insertion section is surrounded by a closed loop by a plurality of workpiece contacts, and for example, even if the workpiece has a deformed cross-sectional shape, the clamp is stably clamped at three or more points of contact that reduce the closed loop surrounding the workpiece. We can always make state that we can. That is, according to this invention, the workpiece which has a mold release cross section can also be clamped suitably.

In the present invention, the plurality of clamp members are formed so that the projection shape parallel to the axial direction of the workpiece contact portion is approximately the same dimension. Therefore, since the projection shape parallel to the axial direction of each workpiece contact part is substantially the same dimension, it is suitable also when clamping not only a mold release cross section but general workpieces, such as a circular shape and a square, and high versatility.

In the present invention, an even number of clamp members is provided, and these clamp members are arranged symmetrically including the workpiece insertion portion. Therefore, the clamping is performed by sandwiching the work pieces with the clamp members arranged opposite to each other, thereby achieving stable clamping. Moreover, since an even number of clamp members is provided, it is advantageous for the displaced arrangement in the axial direction of a workpiece | work contact part.

In addition, the workpiece contact portion in the present invention is characterized in that the pole portion protruding toward the workpiece insertion portion. Therefore, it is possible to fix the workpiece so that the workpiece does not move in the axial direction by the pawl portion.

In the present invention, the workpiece contact portion is formed by a rotatable roller. Therefore, the workpiece can be clamped to be movable in the axial direction by the roller.

In the present invention, the clamp member is composed of a first member and a second member having the workpiece contact portion formed on the apparatus main body side, and the second member is detachably attached to the first member. . Therefore, it is preferable to prepare a plurality of types of second members having different widths, protrusion amounts, and the like of the workpiece contact portion, and to suitably remove and replace the second member with an appropriate type for the first member in accordance with the shape of the workpiece to be clamped. It becomes possible. This results in a clamp device capable of clamping a wide variety of workpieces.

The present invention is also characterized by providing a drive means for moving the clamp member including the synchronous movement mechanism, the drive means having a function of maintaining a constant driving force. Since the drive means has a function of maintaining a driving force of a constant magnitude, especially in the case of a workpiece having a deformed cross section, the workpiece is not inadvertently damaged by a large force.

In the present invention, the plurality of clamp members can be moved synchronously including the synchronous moving mechanism for each pair of opposing clamp members including the workpiece insertion portion. Since each pair of clamp members moves synchronously, in particular, in the case of a workpiece having a release cross section, it is possible to appropriately adjust the shape of the closed loop formed by the plurality of workpiece contacts in accordance with the shape of the workpiece to be clamped.

The present invention is also characterized in that each pair of clamp members is provided with driving means for moving the clamp members including the synchronous moving mechanism, and each of the driving means has a function of maintaining a constant driving force. . In particular, in the case of a workpiece having a deformed cross section, since any clamping part can be clamped with a constant force, the workpiece can be clamped with a stable force without inadvertently damaging the workpiece with a large force.

In addition, the material conveying apparatus which sends a workpiece | work material in a conveyance direction WHEREIN: The raw material holding means set which has the 1st raw material holding means and the 2nd raw material holding means arrange | positioned in the said feeding direction, The said 1st raw material holding means And a first holding portion for holding the workpiece in a fixed manner in the conveying direction, wherein the second workpiece holding means is capable of moving the workpiece in the conveying direction, and a through hole in which the workpiece is penetrated. The 2nd holding part hold | maintains easily, and the said 1st and 2nd raw material holding means were comprised so that it was relatively accessible and transferable in the said conveyance direction, and comprised. Therefore, when sending a workpiece, one end of the workpiece is fixedly held by the first workpiece holding means, and the position near the center of the workpiece is supported (guided) by the second workpiece holding means. Thereby, the automatic conveyance of a workpiece | work material can be performed suitably, without a workpiece | work deforming by self weight.

In the present invention, the set of raw material holding means is provided in two sets in the conveying direction, and these set of raw material holding means are arranged symmetrically in the conveying direction with the second raw material holding means side facing each other. It is characterized by. Therefore, since the workpiece can be accommodated and transferred between two sets of workpiece holding means, the workpiece is deformed by its own weight regardless of the amount of transfer of the workpiece sent from one set of workpiece holding means. It is possible to carry out the automatic transfer of the workpiece.

In the present invention, the first gripping portion is formed in a pole shape, and the second gripping portion is formed by a rotatable roller. Accordingly, the first gripping portion formed in the shape of a pole can be reliably fixed so that the workpiece does not move in the conveying direction, and the workpiece can be smoothly moved in the conveying direction by the second gripping portion formed by the roller.

In the present invention, in the two sets of material holding means, the two first holding portions are provided so as to be rotatable and synchronous in a state in which the rotation angle is controllable. Therefore, three-dimensional processing of a long workpiece can be performed easily by rotating two 1st holding parts, controlling a rotation angle.

Moreover, this invention is provided with the workpiece | work holding means supplying means which can supply a workpiece | work material in the direction which cross | intersects the said conveyance direction between the said 1st workpiece | work holding means and the said 2nd workpiece | work holding means in the said set of material holding means. It is done. Since the supply of the processing material to the set of raw material holding means is made in the direction intersecting with the feed direction by the processing material supply means, for example, the processing without supplying the long working material from the upstream side of the feeding direction of the raw material holding means set Work space can be saved when supplying materials.

Moreover, this invention is a workpiece | work conveying apparatus which sends a workpiece | work material in a conveyance direction, Comprising: The 1st raw material holding means set provided with the 1st raw material holding means arrange | positioned in the said feeding direction, and a 2nd raw material holding means, The said 1st raw material The holding means has a first holding means body and a first holding portion which is formed to protrude toward the second holding material holding means side with respect to the first holding means body, and the first holding portion for holding the workpiece in a fixed manner in the conveying direction. And the second raw material holding means is formed through the second holding means main body, the second holding means main body, the through hole into which the first holding part can be inserted, and the workpiece is movable in the conveying direction. A second gripping portion which grips smoothly, and the first and second workpiece holding means are relatively accessible and transferable in the conveying direction. One that was made up of features. Therefore, when a long workpiece is sent, one end of the workpiece is fixedly held by the first workpiece holding means, and the position near the center of the workpiece is supported (guided) by the second workpiece holding means. Thereby, the automatic conveyance of a workpiece | work material can be performed suitably, without a workpiece | work being deformed by own weight. Further, since the first gripping portion can be inserted into the through hole, one end of the workpiece material held by the first gripping portion can enter the through hole, and as far as possible, the end can be sent in the conveying direction. This reduces the amount of gripping that can not be processed and improves the yield.

In the present invention, the second gripping portion is disposed near the opening on the side of the through hole that is oriented from the first gripping means. Therefore, since one end of the work material held by the first gripping portion can be sent in the conveying direction to the vicinity of the opening of the through hole, the amount of gripping that cannot be processed is reduced and the yield is improved.

In the present invention, the first gripping portion is formed to be adjacent to the second gripping portion in the conveying direction when inserted into the through hole. Therefore, since one end of the work material held by the first gripping portion can be sent to the position adjacent to the second gripping portion in the conveying direction, the amount of gripping that cannot be processed is reduced and the yield is improved.

In the present invention, the first gripping portion is formed in a pole shape, and the second gripping portion is formed by a rotatable roller. Therefore, by the 1st holding part formed in pole shape, it can be fixed reliably so that a workpiece may not move to a conveyance direction, and a process material can move smoothly to a conveyance direction by the 2nd holding part formed with the roller.

Further, in the present invention, the set of raw material holding means is provided in two sets in the conveying direction, and the second raw material holding means is disposed to face each other. Therefore, by using two sets of material holding means, a longer working material can also be appropriately supported and sent between two sets of material holding means.

Moreover, this invention is a linear processing apparatus characterized by having the above-mentioned raw material conveying apparatus and the processing means which can process linearly the processed raw material sent by the said raw material conveying apparatus in the feed direction. Therefore, the linear processing apparatus which exhibits the same effect as the effect by the said invention is provided. This makes it possible to realize processing automation of long workpieces, which is preferable.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The laser processing apparatus 1 which is a three-dimensional linear processing apparatus has the base 2 of the form extended to the left-right direction in the figure, as shown in FIG. 1 and FIG. 2, and the base 2 is ordered from the right side in the figure. The front work feeder 3, the processing part 5, and the back work feeder 6 are arrange | positioned. The front work feeder 3 has a work stock device 7 for supplying one by one the so-called long members in which the same cross-section, such as a pipe or an angle material, continues in the axial direction of the material, and supplies one by one. The stock apparatus 7 has the several conveyor apparatus 10 provided in the base body 2, as shown in FIG.2 and FIG.7. In the conveyor apparatus 10, an endlessly wound chain 10b is provided so as to be synchronously rotatable between the conveyor apparatuses 10, and each of the chains 10b includes a plurality of workpiece supports 10a. It is arranged at predetermined intervals.

As shown in FIG. 19, the workpiece support 10a is prepared in plural kinds according to the cross-sectional shape of various long members which can be processed by the laser processing apparatus 1, and these workpiece supports 10a are attached to and detached from the chain 10b. It is installed interchangeably. In the work support 10a, as shown in Fig. 19, a member mounting portion 10c corresponding to each member is provided so that a long member having various cross-sectional shapes such as circular, rectangular, H-shaped, L-shaped, and C-shaped can be mounted. The workpiece support 10a is attached to the chain 10b according to the member which is formed, respectively, and is processed with the laser processing apparatus 1, and the corresponding elongate member is mounted on the mounted workpiece support 10a.

On the left side of FIG. 7 of the workpiece stock device 7, a plurality of movable mounts 9 are provided on the base 2 so as to be synchronously movable in the directions of arrows A and B of FIG. 7. The work receiving device 11 is provided in the left end part of the drawing of the base 9, respectively. The workpiece mounting part 11a detachably attached to the workpiece accommodating apparatus 11 is provided so that a lifting-up driving can be carried out synchronously between each workpiece accommodating apparatus 11.

In the base 2 of FIG. 2 above of the workpiece stock device 7 of the front workpiece feeder 3, the guide rails 12 are respectively provided in the arrows C and D directions in the X-axis direction, and the guide rails 12 The first chuck device 13 is provided on the base 2 along the guide rail 12 so as to be movable in the directions of arrows C and D, respectively.

As shown in FIG. 3, the first chuck device 13 has a main body 15 suspended from the guide rail 12, and the main body 15 has a gear 16a as shown in FIG. 15. The mounted drive motor 16 is provided. In the drive motor 16, a rotation head 17 supported by the main body 15 so as to be rotationally driven about the central axis CT1 is disposed at the outer circumference of the rotation head 17 as shown in FIGS. 15 and 18. Gear 17a is engaged.

As shown in FIG. 16, the rotating head 17 has the head main body 14 rotatably supported with respect to the main body 15 by the bearing 19, and has the frame body (at the center part of the head main body 14). 14b) is provided in the form which forms the frame of a square shape as a whole. As shown in FIG. 16, the guide rail 14a is provided in each of the sides of the frame 14b in the direction of arrow E, F of FIG. 15 in the form which encloses the frame 14b, and the guide rail of each side ( 14a), slide plates 22 and 23 are provided so as to be slidable in the direction of arrows E and F, including well-known linear bearing means, such as a linear motion guide apparatus, respectively.

The slide plate 22 is provided with a bracket 22a, and the bracket 22a includes a rod 25a provided with a drive cylinder 25 installed in the head main body 14 so as to be movable in the direction of arrows E and F. Is connected. 14 and 16, racks 22b are formed so as to face each other, and each rack 22b has a frame 14b. The gear 21a rotatably supported by the center part of each side of is engaged.

In the pair of slide plates 22 and 23 of each side, the pair of opposing slide plates 22 and 23 on the G and H side of FIG. 15 is formed in a substantially T-shaped connection plate 26 as shown in FIG. Is provided in the form of connecting two pairs of slide plates 22 and 23 facing each other from the G and H sides via arms 26a and 26a, respectively, and each connecting plate 26 has a pawl. The member 27 is attached to each other, including the mounting portion 27a. As shown in Fig. 18, the pawl member 27 is formed in a shape in which the tip thereof protrudes in the left direction in the drawing, and the grip part 27b that is bent inside the head body 14 is formed at the tip of the pawl member 27. Is formed. Moreover, the holding | gripping parts 27b of the pair of pole members 27 which oppose the insertion part 20 of a workpiece | work are formed in the form which opposes each other, as shown in FIG. Moreover, the above-mentioned guide rail 14a, the slide plates 22 and 23, the rack 22b, and the gear 21a are the synchronous movement mechanism 24 for the connection plate 26, and the said synchronous movement mechanism 24 is carried out. Each connecting plate 26 can be moved synchronously.

Moreover, among the slide plates 22 and 23 of each side, the pair of opposing slide plates 22 and 23 on the I and J side of FIG. 15 is formed in a substantially C-shaped connection plate (as shown in FIG. 17). 29 is provided in such a manner as to connect two pairs of slide plates 22 and 23 facing each other on the I and J sides, and each connection plate 29 is connected to the connection plate 26 as shown in FIG. In the drawing, the left side is provided in such a manner as to overlap in the left and right directions without interfering with the connecting plate 26. Each connecting plate 29 is provided with a pole member 30 via a mounting portion 30a, respectively, and the tip of the pole member 30 protrudes to the left in the drawing as shown in FIG. 18. And a bent portion 30b that is bent inside the head body 14 is formed at the tip of the pole member 30. The holding portions 30b of the pair of pole members 30 facing each other with the inserting portion 20 between the workpieces are formed in a shape facing each other, as shown in FIG. As shown in FIG. 18, the holding part 30b is formed in the form which shifted to the left direction in the figure with respect to the holding part 27b of the pole member 27. As shown in FIG. Thereby, as shown in FIG. 17, even when the pole members 27 and 30 approach the center part of the head main body 14, the holding | gripping parts 27b and 30b of both pole members 27 and 30 are carried out. It is formed so as not to interfere with each other. Moreover, the above-mentioned guide rail 14a, the slide plates 22 and 23, the racks 22b and 23b, and the gear 21a are the synchronous movement mechanism 24 for the connection plate 29, and the said synchronization The connection plate 29 can be moved synchronously by the moving mechanism 24.

As mentioned above, each holding | gripping part 27b (30b) was formed so that the projection shape parallel to the axial center axis CT1 of the main body 15 (FIG. 17) may become substantially linear. Further, the pole members 27 and 30 adjacent to each other shift the grip portions 27b and 30b in the axial center direction, whereby the projection shapes parallel to the axial center directions of these grip portions 27b and 30b cross each other. PX) (FIG. 17) was arrange | positioned so that it could cross | intersect. Moreover, each holding | gripping part 27b (30b) is the distance LP between the intersection part PX formed in both sides of the holding | gripping part 27b (30b) in the projection shape parallel to an axial direction (FIG. 17). Is arranged to be movable up to a position smaller than the width LW of the intersection formed on both sides of the gripping portions 27b and 30b. Moreover, the projection shape parallel to the axial direction of each holding | gripping part 27b and 30b is substantially the same dimension.

In the head main body 14 of the first chuck device 13, as shown in Fig. 18, a hole 14c is formed inside the frame 14b, and the hole 14c includes a bracket 14d. The actuator 14f is provided in such a manner that the rod 14g can be protruded and driven in the directions of arrows C and D in the X-axis direction. At the tip of the rod 14g, a kick out plate 14h is mounted.

By the way, the processing part 5 of FIG. 1 has the laser oscillator 31, and the processing head part 32 is provided in the left side of the laser oscillator 31. As shown in FIG. The saddle 33 is provided in the machining head 32 so as to be movable in positioning in the directions of arrows K and L in the Y-axis direction, and between the saddle 33 and the laser oscillator 31, a laser light path tube. The 35 is elastically connected in the form which can supply the laser beam output from the laser oscillator 31 to the saddle 33. FIG.

The lower end of FIG. 1 of the saddle 33 is provided with the machining head 36 capable of positioning the drive in the direction of arrows M and N in the Z-axis direction, and the machining head 36 has a torch as shown in FIG. (A) 37 is provided so that rotation drive positioning is possible in the arrow O, P direction of A-axis direction, and the arrow QB, RB direction of B-axis direction.

As shown in FIG. 4, the second chuck device 39 is fixed to the machining head 32 in a manner that the second chuck device 39 is concentrically aligned with the aforementioned first chuck device 13 in the direction of arrows C and D in the X-axis direction. And the second chuck device 39 has a configuration substantially equivalent to that of the first chuck device 13. Therefore, the same code | symbol is attached | subjected to the same part as the 1st chuck apparatus 13, and the description of the said part is abbreviate | omitted. As shown in FIG. 14, the difference between the second chuck device 39 and the first chuck device 13 is that the hole 14c of the main body 15 penetrates, and the actuator 14f is not provided. This is a point where the gripping portions of the pawl members 27 and 30 attached to the connecting plates 26 and 29 are rotatable roller gripping portions 27c and 30c. In the case of this 2nd chuck apparatus 39, the pawl members 27 and 30 are arrange | positioned near the opening 14t of the left side of the paper surface in FIG. 14 among the holes 14c. In addition, as shown in FIG. 14, the roller holding parts 27c and 30c are also provided in the form which shifted the mounting position in the left-right direction, ie, C, D direction, so that they may not interfere with each other. The 1st and 2nd chuck apparatus 13 and 39 demonstrated above comprise 1 set of 1st chuck apparatus 62. (FIG. 1)

On the left side of FIG. 1 of the second chuck device 39 of the processing head 32, a cut workpiece discharge portion 32a is formed, and the cut workpiece discharge portion 32a and the second chuck device ( Between the 39), the 1st workpiece accommodating apparatus 40 is provided in the form which can accommodate the workpiece supported by the 2nd chuck apparatus 39, and can be accommodated. As shown in FIG. 4, the first work receiving device 40 includes an actuator 41 installed in the machining head 32 in an arrow M, N direction so as to be movable up and down, and the shaft 44 by the actuator 41. Thus, the holding arm 42 is provided so as to be swingable between the second chuck device 39 and the cutting work piece discharging part 32a, and the receiving arm 42 has an L-shaped work receiving part 42a at its tip. Is formed.

In the left side of FIG. 1 of the 2nd chuck apparatus 39 in the processing head part 32, the guide rail 32b is formed in parallel in the arrow (C, D) direction of an X-axis direction, and the guide rail 32b is shown in FIG. The third chuck device 43 is provided on the guide rail 32 so as to be movable in positioning. The third chuck device 43 is provided concentrically with the first and second chuck devices 13 and 39, and the configuration of the chuck portion is the same as that of the second chuck device 39, but the arrangement thereof is shown in FIG. As shown in the figure, the second chuck device 39 is disposed symmetrically.

As shown in FIGS. 5 and 8, the main body 15 of the third chuck device 43 is provided with a second work receiving device 45, and the second work receiving device 45 also has a first work receiving device. The attachment positions of the 40 and the actuator 41 are different, and have substantially the same configuration. Therefore, the same code | symbol is attached | subjected to the same part as the 1st workpiece accommodation device 40, and description of the said part is abbreviate | omitted.

On the other hand, as shown in FIG. 1 and FIG. 2, the rear workpiece feeder 6 is provided with a fourth workpiece accommodation device 55 having the same configuration as that of the first workpiece accommodation device 40, as shown in FIG. 9. In addition, the guide rail 46 is provided in the back side workpiece feeder 6 in the base 2 in parallel to the arrow C, D direction which is an X-axis direction. The fourth chuck device 47 is provided on the guide rail 46 so as to be movable in positioning in the directions of arrows C and D in the X-axis direction along the guide rail 46. The fourth chuck device 47 is installed in the form of concentrically matching the first to third chuck devices 13, 39, 43 in the X-axis direction, and the fourth chuck device 47 has its chuck portion. Although the structure of this is the same as that of the 1st chuck apparatus 13, the arrangement is arranged symmetrically with respect to the 1st chuck apparatus 13, as shown in FIG. The third and fourth chuck devices 43 and 47 described above constitute a set of second chuck device sets 63, and the second chuck device set 63 and the first chuck device set described above ( The material conveying apparatus 60 is comprised by 63. (FIG. 11)

In the main body 15 of the fourth chuck device 47, as shown in FIGS. 6 and 16, a third workpiece receiving device 50 similar to the second workpiece receiving device 45 of the third chuck device 43 is provided. Is provided, the same code | symbol is attached | subjected to the part same as the 2nd work accommodation device 45, and description of the said part is abbreviate | omitted.

The lower part of FIG. 2 of the rear side workpiece feeder 6 is provided with the workpiece | work carrying out apparatus 51, and the workpiece | work carrying out apparatus 51 has shown the several conveyor apparatus 52 as shown to FIG. 2, FIG. 5, and FIG. Holds.

Since the laser processing apparatus 1 has the structure as mentioned above, when using the said laser processing apparatus 1 to process what is called a long member in which the same cross section, such as a pipe, an angle material, a shaped steel, continues in a member axial direction, The long member to be processed is mounted on the conveyor device 10 of the workpiece stock device 7. Since the conveyor apparatus 10 is provided with the workpiece support 10a in which the corresponding member mounting part 10c was formed, as shown in FIG. 19 in the form corresponding to the cross-sectional shape of the elongate member 53 to process, the corresponding workpiece | work The long member 53 to be processed is mounted on the support 10a.

Next, the conveyor apparatus 10 is driven to convey the elongated member 53 mounted on each work support 10a in the direction of arrow A, as shown in FIG. The workpiece holding device 11 is moved to the conveyor device 10 side. While moving the conveyor apparatus 10 in the A direction, the elongate member 53 mounted on the rightmost workpiece support 10a in the drawing is transferred to the workpiece mounting portion 11a of the workpiece receiving device 11. Viii) Moreover, as shown in FIG. 19, the shape of the workpiece mounting part 11a also attaches and uses the thing suitable for the cross-sectional shape of the elongate member 53. As shown in FIG.

In this state, the workpiece holding device 11 is moved in the direction of arrow A, and at the same time, the upper holding member 53 mounted on the workpiece holding device 11 is moved to the first chuck device 13 and the first chuck device 13. Position between the two chuck device (39). Next, the drive motors 16 of the first and second chuck devices 13 are driven to rotate, respectively, so that the rotation head 17 including the gears 16a and 17a is rotated relative to the main body 15. It rotates about CT1), and positions it in the predetermined orientation position, ie, the reference angle position around the center axis CT1 which becomes a processing reference | standard using the rotating head 17. As shown in FIG. Next, all the drive cylinders 25 of the respective rotation heads 17 are driven to retract the rod 25a in the direction of the arrow E. FIG. Then, all the slide plates 22 connected to the rods 25a including the brackets 22a also move in the E direction via the guide rails 14a, and at the same time, the racks 22b of the slide plates 22 and 23 are moved. The slide plate 23 also starts to move in the direction of the arrow F in the form of being synchronized with the slide plate 22 via the blade 23b and the gear 21a.

Then, two pairs of pole members 27 and 30 mounted on the two pairs of slide plates 22 and 23 of the first chuck device 13 including the connecting plates 26 and 29 are mounted. 18 moves radially outward with respect to the arrow R direction of FIG. 18, that is, the central axis CT1, and the holding portions 27b and 30b of the respective pole members 27 and 30 are released, and the first chuck device (13) is in a released state.

Similarly, the roller holding portions 27c and 30c of the pawl members 27 and 30 are also moved radially outward with respect to the arrow R direction in FIG. 14, that is, the central axis CT1. Then, the roller gripping portions 27c and 30c of each pole member 27 and 30 are released, and the second chuck device 13 is brought into the released state.

In this state, when the first chuck device 13 is moved along the guide rail 12 in the direction of the arrow C in FIG. 1, the right end of the long member 53 mounted on the work mounting portion 11a of the work receiving device 11. The portion is inserted between the four pole members 27 and 30 in the released state of the first chuck device 13 which is driven to move in the C direction as shown in FIG.

Next, in this state, the drive cylinder 25 of the first chuck device 13 is driven in the opposite direction to that described above to protrude the rod 25a in the direction indicated by the arrow F. Then, two pairs of pole members 27 and 30 mounted on two pairs of slide plates 22 and 23 facing each other via connecting plates 26 and 29 are arranged in the direction of arrow Q in FIG. It moves radially inward with respect to the central axis CT1, and the holding | gripping parts 27b and 30b of each pole member 27 and 30 also move to arrow Q direction.

This movement is performed by moving the slide plates 22 and 23 synchronously in the direction of the arrow Q, including the racks 22b and 23b and the gear 21a, as shown in FIG. In the apparatus 13 as a whole, the pawl members 27 and 30 mounted on the respective slide plates 22 and 23 are simultaneously held in the direction of the central axis CT1, and the grip portions 27b of the pawl members 27 and 30 are used. The distance L1 between the 30b and the central axis CT1 is always the same to move at the same speed. As shown in FIG. 17, since each holding | gripping part 27b and 30b is formed linearly in the form which forms 90 degrees with each other, four sides are attached to holding | gripping parts 27b and 30b of each pole member 27 and 30. FIG. The long member 53 inserted into the head main body 14a in the form surrounded by the grip is gripped in such a way that its center of dimensions is automatically centered with respect to the central axis CT1 by the respective grip portions 27b and 30b. Will be. This centering operation is performed in such a manner that the rectangular center position circumscribed in the cross-sectional shape of the elongate member 53 coincides with the central axis CT1.

Moreover, each pair of pole members 27 and 30 which oppose each other respond | corresponds when the reaction force accompanying the holding | gripping force which acts on these pole members 27 and 30 from the elongate member 53 side reaches a predetermined value. Since driving of the drive cylinder 25 is stopped, even if the elongate member 53 moves in the arrow Q direction of each pair of pole members 27 and 30 like a rectangular cross section or the like, the elongated member 53 can be held with an appropriate gripping force. Can be gripped.

As described above, the distance LP between the intersecting portions PX formed on both sides of the gripping portions 27b and 30b in a projection shape in which the respective gripping portions 27b and 30b are parallel to the central axis CT1 direction. ) Is movable at a position smaller than the width LW of the holding portions 27b and 30b, so that the projection shape parallel to the central axis CT1 direction forms a closing ring, and The plurality of holding portions 27b and 30b are movable in a form that can be enlarged and reduced in size. That is, the long member 53 inserted into the inserting portion 20 is surrounded by a closed loop by a plurality of holding portions 27b and 30b. Reducing the closed loop will necessarily create a state where the clamp can be reliably clamped at three or more contacts. That is, according to the 1st-4th chuck apparatus which concerns on a present Example, the workpiece | work which has a modified cross-sectional shape can also be clamped suitably.

In this manner, when the end of the long member 53 is gripped by the first chuck device 13, the first chuck device 13 is moved in the direction of arrow C in FIG. 1, and thereafter, in the drawing of the long member 53. The left end is inserted into the hole 14c of the second chuck device 39 having the roller gripping portions 27c and 30c in the released state, and the lower side of the processing head 36 of the processing head portion 32 is inserted. Posted in

In this state, similarly to the first chuck device 13, the drive cylinder 25 of the second chuck device 39 is moved and driven in the direction shown by the arrow F in FIG. 15, so that the roller gripping portions 27c and 30c are similarly shown. 13 is synchronously moved in the direction of arrow Q, and gripped in the form of centering the distal end of the long member 53.

In this way, when the elongate member 53 is gripped in the form centered by the 1st and 2nd chuck apparatuses 13 and 39, while lowering the workpiece mounting part 11a of the workpiece receiving apparatus 11 of FIG. , The movable stand 9 is retracted in the direction of the arrow B. FIG. Next, the long chuck member 53 in the state gripped by the first and second chuck devices 13 and 39 is processed by appropriately moving and driving the first chuck device 39 in the arrow C direction of FIG. 1. It is sent to the head part 32 side, and the position which the elongate member 53 should process is located in the predetermined process position below the process head 36. As shown in FIG.

At this time, the elongate member 53 is not rotatable with respect to the axis center CT1 by the roller holding parts 27c and 30c of the 2nd chuck apparatus 39, but moves to the arrow C, D direction which is X-axis direction. Since it is possible to support, the long chuck member 53 can be easily moved in the state which maintained the centering state to the X-axis direction by moving and driving the 1st chuck apparatus 13 to arrow C direction.

In this way, when the site | part to be processed of the elongate member 53 is positioned in the predetermined process position of the lower side of the process head 36, a laser beam will be processed through the laser oscillator 31 and the laser light path tube 35. ), A laser is emitted from the torch 37 to the long member 53 and the cutting process is started. Machining is performed based on a predetermined machining program, by means of a driving motor 16, the rotary head 17 of the first and second chuck devices 13 and 39 via a numerical control device (not shown). Rotationally synchronously circumferentially drives the elongate member 53 in a rotable manner at an arbitrary position on the X axis (i.e., the C axis), and simultaneously moves the first chuck device 13 to the arrows C, D. Driving in the direction of movement. The elongate member 53 is moved by driving so as to be capable of positioning and holding at an arbitrary position in the directions of the arrows C, D and the C axis.

As described above, the torch 37 has a Y axis direction in the arrow K, L direction, a Z axis direction in the arrow M, N direction, an arrow O, an A axis direction in the P direction, an arrow QB, and a B in the RB direction. Since the movable drive positioning is possible in the axial direction, three-dimensional solid machining can be easily performed on the long member 53 in addition to the above-described movement driving operation of the long member 53.

When the cutting process by the torch 37 of the elongate member 53 is complete | finished, the said cut | disconnected workpiece is discharged | disconnected by the workpiece accommodating part 42a of the 1st workpiece accommodation device 40, as shown in FIG. It is discharged to the part 32a. When the cutting workpiece is discharged to the workpiece discharging portion 32a, the first chuck device 13 is driven to move by a predetermined amount again in the direction of arrow C, that is, in the direction of the machining head 36, and the unprocessed portion of the long member 53 is removed. It is sent again to the direction of arrow C, ie, the processing head 36 side, from the two chuck apparatus 39, and predetermined processing is performed continuously by the torch 37 based on a machining program.

In the above-described case, the tip member of the long member 53 is cut while the long member 53 is supported by only the first and second chuck devices 13 and 39, and the finished workpiece is removed. Although the case where it discharged to the workpiece discharge part 32a provided below the processing head 36 was described, in the laser processing apparatus 1, in addition to the processing method mentioned above, the 3rd chuck apparatus 43 or the 4th as needed. The long member 53 is supported by the chuck device 47, and the long member 53 is supported by the chuck devices 13, 39, 43, 47 on both sides of the processing apparatus, and the chuck is in that state. It is also possible to cut the elongate member 53 with the torch 37 between the devices 39 and 43.

In this case, the third chuck device 43 is capable of positioning the moving drive over a predetermined distance range in the directions of arrows C and D, and the fourth chuck device 47 is approximately the entire length of the X axis of the rear work feeder 6. Since the movable drive positioning is possible, the support of the long member 53 requires that the third chuck device 43 or the fourth chuck device 47 be moved from the long member 53 according to the length of the workpiece to be cut. It moves in the X-axis direction, and moves the 1st chuck | zipper apparatus 13 to the direction of arrow C in that state, and makes the elongate member 53 to arrow C direction longer than the case of the process by the state which supported only one side mentioned above. The long member 53 is also supported on the third chuck device 43 and, if necessary, the fourth chuck device 47. Then, since the elongate member 53 is supported by both sides of the process part across the torch 37, the elongate member 53 can be processed with good precision without bending the self-weight.

Similarly to the second chuck device 39, the third chuck device 43 also holds the long member 53 with the roller gripping portions 27c and 30c to free the long member 53 in the directions of arrows C and D. It can hold | maintain while moving, and can cut the workpiece of arbitrary length easily.

The first, second, third and fourth chucks may also be formed by rotating the elongated member 53 at a predetermined angular position around the central axis CT1 or by rotating at a predetermined angular velocity. This can be done simply by synchronously rotationally driving the respective rotation heads 17 of the devices 13, 39, 43 and 47.

In addition, the first and fourth chuck devices 13 and 47 are synchronously driven to drive the first and fourth chuck devices 13 and 47 in the X-axis direction while holding the long member at both ends thereof. It is of course possible to process the long member while slidingly supporting the second and third chuck devices 39 and 43.

As described above, when the long member is sent, one end of the long member is fixedly held by the first chuck device 13 and the fourth chuck device 47, and the second chuck device 39 and the third chuck device ( 43) to guide and support the position near the center of the elongate member to be movable. Thereby, the automatic conveyance of a long member can be performed suitably, without a long member deform | transforming by self weight. Further, the pawl members 27 and 30 of the first chuck device 13 and the fourth chuck device 47 can be inserted into the holes 14c of the second chuck device 39 and the third chuck device 43. As a result, one end of the gripped elongate member can enter this hole 14c, and as far as possible the end is sent in the conveying direction. This reduces the amount of gripping that can not be processed and improves the yield.

In addition, when cutting a relatively long workpiece | work, the workpiece cut | disconnected by the torch 37 is a state which supported the workpiece which cut | disconnected the 4th chuck apparatus 47 in the state which released the 3rd chuck apparatus 43. When the end of the cut work is moved in the direction of arrow C, and the end of the cut piece is pulled out in the direction of arrow C by the third chuck device 43, the second, third, and fourth workpieces are in a state of being pre-swing in the direction of the central axis CT1. The cut workpiece is moved on the receiving devices 45, 50, 55.

In this state, the grip portions 27b and 30b of the fourth chuck device 47 are released, and the actuator 14f of the fourth chuck device 47 is driven to protrude the kick-out plate 14h. The workpiece is transferred onto the second, third and fourth workpiece receiving devices 45, 50 and 55. And the 2nd, 3rd, and 4th workpiece accommodation devices 45 and 50 and 55 are rocked downward as shown to FIG. 5 and FIG. 6, and the cut | disconnected workpiece is the conveyor apparatus of the workpiece | work carrying out apparatus 51. FIG. Transfer to (52). The finished workpiece transferred on the conveyor apparatus 52 is appropriately taken out to the outside by the conveyor apparatus 52 and the attraction force.

Moreover, the 1st and 2nd chuck apparatus 13 (39) performs the conveyance of the elongate member 53 with respect to the processing head part 32, and carrying out from the processing head part 32 of the cut | disconnected workpiece is carried out. Although the 3rd and 4th chuck apparatus 43 and 47 mainly perform, the 2nd and 3rd chuck apparatus 39 and 43 of the processing head part 32 side are 3rd, as shown to FIG. 11 and FIG. Since the chuck device 43 can be brought into contact with each other while the roller holding parts 30c and 30c are moved to the rightmost side in the drawing, the long member 53 held by the second chuck device 39 side. ) Can be gripped with a minimum protruding length from the third chuck device 43, and even when the long member 53 is shortly cut in the X-axis direction, cutting is also performed on the third chuck device 43 side. Even when the finished workpiece is gripped and end machining is performed, the workpiece can be gripped reliably.

In addition, as shown in Figs. 11 and 12, the first and fourth chuck devices 13 and 47 have their pole members 27 and 30 as the second and third chuck devices 39 and 43. It is inserted into the hole 14c of the rotating head 17, and the holding part 27b, 30b of the front end part is near the roller holding part 27c, 30c of the 2nd and 3rd chuck apparatus 39, 43. Since it can reach to, when processing by the processing head 36 is carried out, holding by the 1st and 4th chuck apparatus 13, 47, the amount of holding for processing can be minimized, Processing in the form in which the amount of cut is minimized is enabled, and the yield of the material can be improved.

Moreover, the remnants of the long member 53 last remaining on the first chuck device 13 or the fourth chuck device 47 side drive the actuator 14f with the pawl members 27 and 30 in the released state. Thus, the kickout plate 14h can be smoothly discharged to the outside of the chuck devices 13 and 47 by protruding in the direction of arrow C or D of FIG.

Moreover, although the Example mentioned above demonstrated the laser processing apparatus as a three-dimensional linear processing apparatus, it is not limited to a laser processing apparatus as a three-dimensional linear processing apparatus, If a member can be cut-processed in a linear form, a plasma cutting apparatus Various three-dimensional linear processing equipment, such as a gas cutting device, can be used.

The control shaft configuration of the laser processing apparatus 1 described above is that the torch 37 of the processing head 36 has four control shaft configurations of the Y-axis, the Z-axis, the A-axis, and the B-axis. Although the 3rd chuck apparatus 43 and the 4th chuck apparatus 47 were made into the 2 control shaft structure of X-axis and C-axis control, and the 2nd chuck apparatus 39 was made into 1 soccer performance of C festival, The control shaft configuration as a whole may be any configuration as long as the machining head 36 can process a free-form surface.

In the above-described embodiment, four clamp members including the connecting plates 26 and 29 and the pawl members 27 and 30 are provided, but the number is not limited to four. For example, it is also possible to form a clamp device by providing three, five or more clamp members.

In the above-described embodiment, the widths LW of the gripping portions 27b and 30b and the roller gripping portions 27c and 30c are all the same dimensions, but the widths need not necessarily be the same dimensions. In addition, you may comprise the 2nd chuck apparatus 39 so that a movement to arrow C and D direction is possible.

As mentioned above, although this invention was demonstrated based on the Example, the Example described in this invention is illustrative and is not limited. Moreover, the scope of the invention is shown by the attached Claims, and is not restrained by the description of an Example. Accordingly, all modifications and variations that fall within the scope of the claims are within the scope of the present invention.

As described above, by using the three-dimensional linear processing device, the automatic material feeder, and the clamping device according to the present invention, free-cut cutting and the like are continuously performed on long members having various cross-sectional shapes such as pipes and angle materials. It can carry out and mass production process becomes easy.

In addition, by using the clamping device for a machine tool according to the present invention it is possible to grip the material of various cross-sectional shape to facilitate processing.

In addition, by using the automatic material conveying apparatus according to the present invention it is possible to easily automatically convey so that mass production processing is possible when processing the material of the elongated member shape with a machine tool.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which showed the whole of the laser processing apparatus which is an example of a three-dimensional linear processing apparatus.

FIG. 2 is a plan view of the laser processing apparatus of FIG. 1. FIG.

3 is a side view showing the vicinity of a first chuck device in the laser processing device of FIG.

4 is a side view showing the vicinity of a second chuck device in the laser processing device of FIG.

FIG. 5 is a side view showing the vicinity of the third chuck device in the laser processing device of FIG. 1. FIG.

FIG. 6 is a side view showing the vicinity of a fourth chuck device in the laser processing device of FIG.

7 is a side view of a carry-in conveyor section in the laser processing apparatus of FIG. 1.

8 is a side view showing an example of an operating state of a work receiving device;

9 is a side view illustrating an example of an operating state of a work receiving device.

10 is a side view showing an example of an operating state of a work receiving device;

11 is a plan view showing a state where the first to fourth chuck devices are as close as possible;

12 is a front view of FIG.

13 is a front view of the second and third chuck devices;

14 is a side view of the second and third chuck device;

15 is a front view showing the pole opening and closing drive of the chuck device;

FIG. 16 is a side view of FIG. 15

17 is a front view of the first and third chuck devices;

18 is a side view of FIG.

19 is a side view showing an example of a work support for mounting various long work pieces;

Explanation of symbols on the main parts of the drawings

 1: laser processing apparatus 2: gas

 3: front workpiece feeder 5: machining part

 6: rear workpiece feeder 7: stock device

 9: moving mount 10: conveyor device

13: first chuck device 39: second chuck device

43: third chuck device 47: fourth chuck device

Claims (34)

It has a processing head part provided with a processing head which can process the elongate member along the free curved shape, Installing a 1st material conveying apparatus which sends a elongate member to a 1st direction with respect to the said processing head part, In the three-dimensional linear processing apparatus which performs a three-dimensional linear processing based on a machining program with respect to the long member supplied to the process head part by the said raw material conveying apparatus, The first workpiece conveying apparatus has first and second long member holding means, The first long member holding means is provided with a gripping portion for holding the long member to be fixed in the first direction. The second long member holding means is provided on the processing head portion side than the first long member holding means, The second long member holding means is provided with a through hole through which the long member can penetrate, and a gripping portion for gripping the long member to be movable in the first direction, And said first and second elongated member gripping means are provided so as to be relatively accessible and transferable in said first direction. The method according to claim 1, A second material feed device is provided on the opposite side to the first material feed device of the processing head; The second material conveying device has a third and a fourth elongate member holding means, The third long member holding means is provided on the processing head portion side than the fourth long member holding means, The third long member holding means is provided with a through hole through which the long member can penetrate, and a gripping portion for gripping the long member to be movable in the first direction, The fourth long member holding means is provided with a gripping portion for holding the long member to be fixed in the first direction. And the third and fourth elongated member gripping means are provided so as to be relatively accessible and transferable in the first direction. The method according to any one of claims 1 and 2, The long member holding means is a three-dimensional linear processing apparatus configured to be rotatably driven in a state in which a gripping portion can control a rotation angle, and configured to be rotatable in a state in which the long holding member is held by the respective gripping portions. The method according to claim 3, The gripping portion is a three-dimensional linear processing device which is provided so as to be rotationally driven in a form synchronized with the gripping portion of the other elongate member gripping means. The method according to any one of claims 1 and 2, The gripping portion is provided with a material centering means is a three-dimensional linear processing device, characterized in that. The method according to any one of claims 1 and 2, The first elongate member gripping means is provided so as to be movable in positioning in the first direction, The second long member holding means is a three-dimensional linear processing apparatus fixed to the processing head. The method according to any one of claims 1 and 2, The three-dimensional linear processing apparatus is a three-dimensional linear processing apparatus. The method according to any one of claims 1 and 2, The three-dimensional linear processing apparatus is a plasma cutting apparatus. The method according to any one of claims 1 and 2, The three-dimensional linear processing apparatus is a three-dimensional linear processing apparatus is a gas cutting device. The method according to claim 2, The said 2nd and 3rd elongate member holding | gripping means are provided so that approaching and carrying around is possible in a 1st direction relatively, and both hold | grip parts can contact in both close proximity, 3D linear processing Device. The method according to any one of claims 1 and 2, A three-dimensional linear processing apparatus, wherein the gripping portion of the first elongate member gripping means is inserted into the through hole of the second elongate member gripping means. The method according to claim 2, The three-dimensional linear processing apparatus formed so that the holding | gripping part of a 4th elongate member holding means may be inserted in the through hole of the said 3rd elongate member holding means. The method according to claim 2, The first and fourth elongate gripping means are provided with a three-dimensional linear processing device which is provided so as to be synchronously movable in the first direction. The method according to any one of claims 1 and 2, The first and second long member holding means are three-dimensional linear processing apparatus which is provided so as to be movable in positioning in the first direction, respectively. A clamp device for clamping a workpiece when machining the workpiece with a machine tool, Holds the device body, A workpiece inserting portion capable of inserting a workpiece into the apparatus body in the axial direction of the apparatus body, Three or more clamp members are installed around the workpiece insertion portion so as to be synchronously moved in the radial direction by a synchronous moving mechanism, In the clamp device for a machine tool in which the workpiece contact part was formed in each said clamp member in the form facing the said workpiece insertion part, The workpiece contact portion is formed such that the projection shape parallel to the axial direction is substantially straight; The clamp members adjacent to each other are arranged so as to cross the workpiece contact portions in the axial direction so that the projection shapes parallel to the axial direction in the workpiece contact portions form an intersection. Each of the workpiece contact portions is arranged to be movable to a position where the distance between the intersection portions formed on both sides of the workpiece contact portion in the projection shape parallel to the axial direction is smaller than the width of the workpiece contact portion. Clamping device for machine tools. The method according to claim 15, And said plurality of clamp members is formed such that the projection shape parallel to the axial direction of the workpiece contact portion has approximately the same dimensions. The method according to claim 15, An even number of said clamp members is provided, and these clamp members are arrange | positioned symmetrically, including the said workpiece insertion part. The method according to claim 15, And said workpiece contact portion is a pawl portion protruding toward said workpiece insertion portion. The method according to claim 15, And said workpiece contact portion is formed by a rotatable roller. The method according to claim 15, The said clamp member consists of a 1st member by the side of the said apparatus main body, and the 2nd member with which the said workpiece contact part was formed, The said 2nd member is removable with respect to the said 1st member, The clamp for machine tools characterized by the above-mentioned. Device. The method according to claim 15, A driving means for moving the clamp member including the synchronous movement mechanism to drive the movement; And said drive means has a function of maintaining a driving force of a constant magnitude. The method according to claim 17, And said plurality of clamp members are synchronously movable including the synchronous movement mechanism for each pair of opposing clamp members including the workpiece insertion portion. The method according to claim 22, For each pair of clamp members, driving means for moving and driving these clamp members including the synchronous movement mechanism, Each said drive means is provided with the function which maintains the driving force of a fixed magnitude | variety. In the material conveying device for sending the workpiece in the conveying direction, A work holding means set having a first work holding means and a second work holding means arranged in said conveying direction, The first raw material holding means has a first holding portion for holding the processing material to be fixed in the conveying direction, The second material holding means has a through hole in which the work material is penetrated, and a second gripping part for gripping the work material in the conveying direction, The said 1st and 2nd raw material holding means were installed so that it was relatively accessible and transferable in the said conveyance direction, The material conveying apparatus comprised characterized by the above-mentioned. The method of claim 24, The material holding means sets are provided in two sets in the conveying direction, and these material holding means sets are arranged symmetrically in the conveying direction with the second material holding means side facing each other. Conveying device. The method of claim 24, And the first gripping portion is formed in a pole shape, and the second gripping portion is formed by a rotatable roller. The method according to claim 25, In the two sets of material holding means set, the two first holding parts are provided so as to be rotatable and synchronously in a state capable of controlling the rotation angle. The method of claim 24, And a work material supply means capable of supplying a work material in a direction intersecting the transfer direction between the first work holding means and the second work holding means in the work holding means set. In the material conveying device for sending the workpiece in the conveying direction, A work holding means set having a first work holding means and a second work holding means arranged in said conveying direction, The first raw material holding means is formed in a form protruding toward the second holding material holding means with respect to the first holding means main body and the first holding means main body, the first holding means for holding the workpiece in the conveying direction fixedly; 1 hold the grip, The second material gripping means is a second gripping means main body, a through hole formed through the second gripping means main body, the first gripping portion can be inserted into the first gripping material to move the workpiece in the conveying direction; 2 hold parts, The said 1st and 2nd raw material holding means were installed so that it was relatively accessible and transferable in the said conveyance direction, The material conveying apparatus comprised characterized by the above-mentioned. The method of claim 29, And the second gripping portion is disposed near the opening on the side of the through hole, which is oriented by the first material gripping means. The method of claim 29, And the first gripping portion is formed to be adjacent to the second gripping portion in the conveying direction when inserted into the through hole. The method of claim 29, And the first gripping portion is formed in a pole shape, and the second gripping portion is formed by a rotatable roller. The method of claim 29, The material holding means set is provided with two sets in the conveying direction and is disposed so as to face the second material holding means side to each other. The material conveying apparatus of any one of Claims 29-33, And a processing means capable of performing linear processing on the processing material sent in the conveying direction by the material conveying apparatus.