JP4252861B2 - Bar feeder and bar processing system - Google Patents

Description

  The present invention relates to a bar supply machine, and more particularly, a bar supply machine that supplies a bar to be processed to a processing section of the bar processing machine using a feed arrow, and a bar supply machine and a bar processing machine Relates to a bar processing system combining

  2. Description of the Related Art Conventionally, there has been known a bar supply machine that supplies a bar to be processed to a processing section of a bar processing machine by a feed arrow. In many cases, a bar material is processed into a plurality of products from a single bar material, and each time processing of one product is completed, the processed product part is cut through to a predetermined length L to form a product. . In such conventional processing, a portion of a predetermined distance L from the tip of the bar is cut through, so a stopper that abuts the front end of the bar is provided on the bar processing machine side. The bar is positioned by pressing the front end against the stopper, and the bar is cut through to the exact length L.

  In addition, the conventional feed arrow generally has a finger chuck that fits and grips the rear end portion of the bar at the tip portion. The front end of the new bar inserted into the guide rail from the material shelf on which the bar is placed is controlled by the stopper, and the feed arrow is moved from the rear of the bar to move the rear end of the bar And press into the finger chuck of the feed arrow. The rear end of the bar only needs to be inserted in the finger chuck to the extent that it does not come off during feeding of the bar. Arbitrary length.

  As will be described later, the present invention relates to the positioning of the bar, but unlike the case of the above-described conventional processing, the bar is completely different from the case where the bar is positioned on the bar processing machine side. Since the bar is positioned on the feeder side, there is no prior art document directly related.

  Some parts, for example, are formed by processing both ends of a bar material, such as parts that support both ends with bearings. When processing such a part, a bar material cut slightly longer than the final part length L by the machining allowance is used. This length is always longer than L, but the machining allowance varies, and the overall length is a mixture of various lengths. First, one end of the bar is processed, and then the other end is processed with the bar reversed. At this time, if the other end of the bar is fed toward the bar processing machine, and the other end is pressed against the stopper on the bar processing machine side to position the bar, and then processed, The length to the end (final product length) remains longer than L. In addition, since bar materials of various lengths are mixed, products of different lengths are mixed.

  Accordingly, an object of the present invention is to provide a bar feeder and a bar processing system that can easily and automatically perform product processing that requires both end processing.

In the present invention, in order to achieve the above object, the bar is positioned on the bar feeder side.
That is, in order to achieve the above object, a bar feeder according to the present invention is a bar feeder that feeds a bar to be processed along a feed axis to a processing portion of the bar processing machine by a feed arrow. A guide rail extending along the feed axis for guiding the bar to the bar processing machine, and a contact surface abutting on the rear end of the bar, the bar abutting on the contact surface A bar that feeds the bar toward the bar processing machine while pushing the bar along the guide rail, a barbed drive means for moving the barb back and forth in the feed direction, and bar processing of the bar Controller that controls the feed arrow drive means to stop the feed arrow when the contact surface reaches a position at a predetermined distance upstream of the product processing position of the bar processing machine in order to process by the machine It is characterized by having.

  In the bar feeder configured as described above, by pushing the bar with the feed arrow, the rear end of the bar comes into contact with the contact surface, and the contact surface is fed from the product processing position of the bar processing machine. When the position of the predetermined distance on the upstream side in the feed direction is reached, the feed arrow driving means is controlled by the controller to stop the feed arrow. At this time, the rear end of the bar is also at a predetermined distance from the product processing position, and the rear end of the bar can be positioned with respect to the product processing position of the bar processing machine. This “distance from the contact surface to the product processing position of the bar processing machine” is equal to the length of the bar to be processed in the current processing. For example, in the case of a part formed by processing both ends, the rear end of the bar has already been processed, and when processing the front end in this processing, the predetermined distance is the finished length dimension of the product equal. As described above, in the present invention, since the bar can be positioned on the bar processing machine side, it is particularly useful for parts formed by processing both ends.

  As described above, the bar feeder according to the present invention is not limited to the case of processing the other end of the bar after the processing of one end, but the rear end of the bar is not processed. It is also useful in some cases. That is, it is also useful when processing the end portion on the side to be processed at the beginning of the product. In this case, the predetermined distance is, for example, a distance obtained by adding a cutting allowance to the overall length finish dimension of the product. The machining allowance may be cut when the other end is machined. Whether the product is long or short, it can be processed in the same process.

  In the bar feeder according to the embodiment of the present invention, preferably, the feed arrow extends forward of the abutting surface and releases the gripping position for gripping the rear end of the bar and the rear end of the bar. And at least two finger members movable between the release position and finger drive means for moving the at least two finger members between the gripping position and the release position, and the controller moves the feed arrow a predetermined distance The finger member is controllable to maintain the finger member in the release position while the finger member is maintained in the release position, and the finger member is maintained in the gripping position while the bar is retracted and the bar is brought back.

  In this embodiment, when the bar is advanced, the finger member is maintained in the release position. Therefore, when the bar is pushed by the feed arrow, the finger member is not obstructed, and the rear end of the bar is reliably Contact the contact surface. Therefore, when the abutment surface is stopped at a predetermined distance upstream from the product processing position of the bar processing machine, the rear end of the bar is also securely positioned at this position. Can be positioned. Also, by processing the front end of the bar by moving the finger member to the gripping position, the rear end of the bar is gripped by the finger member, the feed arrow is retracted, and the bar is brought back to the bar feeder be able to.

  In another embodiment of the present invention, preferably, each of the at least two finger members is provided to be pivotable about a pivot located in the middle in the longitudinal direction, and the finger driving means is a main body of the feed arrow. The finger drive shaft provided in the inside so as to be movable back and forth in parallel with the feed axis, and the finger member is biased to a release position in which the distal ends of at least two finger members are moved away from each other and the proximal ends are brought closer to each other And the controller is controllable to move the finger drive shaft forward or backward, and when the finger drive shaft advances, the front end of the finger drive shaft is subjected to the biasing force by the finger biasing means. Counteract to enter between the proximal ends of at least two finger members and spread it out so that at least two When the gar member is pivoted from the release position to the gripping position, and when the finger drive shaft is retracted, the proximal ends of the at least two finger members are pivoted again by the finger biasing means to approach each other and release from the gripping position Move to position.

  The feeding arrow can be accommodated in a narrow guide rail, and has a structural limitation because it must move smoothly in the guide rail. In the present embodiment, by using a combination of the finger drive shaft and the finger urging means, the movement of the finger member between the release position and the gripping position can be configured in a compact manner.

Furthermore, in another embodiment of the present invention, preferably, the space surrounded by the finger member and the abutment surface constitutes a bar receiving area for receiving the bar rear end, and the feed arrow further comprises: It has a push rod for extruding the bar received in the bar receiving area, and the push rod moves between the protruding position protruding into the bar receiving area and the retracting position retracted from the bar receiving area It is provided as possible.
In this bar feeder, after the processed bar is brought back to the bar feeder, the push rod is moved from the retracted position to the protruding position, so that the rear end of the bar in the bar receiving area is moved there. The bar can be surely eliminated by extruding from

  Furthermore, in another embodiment of the present invention, preferably, the feed arrow further has rod biasing means for biasing the push rod to the retracted position, and the push rod is in the first position when in the retracted position. And an engaging portion that is located at the second position when in the projecting position and that is linked to the push rod, and that is fixed to the bar feeder main body and that operates the operating portion. In the vicinity of the retreating position of the feed arrow that takes and removes the processed bar, the engaging portion engages with the operating portion of the push rod. It is moved from the first position to the second position against the urging force. Note that the engaging portion may be attached to any portion of the bar feeder main body as long as it can be fixed, such as a support frame or a guide rail.

  In this bar feeder, when the feed arrow moves forward, the push rod is biased to the retracted position, and at this time, the operating portion is in the first position. When the feed arrow reaches the vicinity of the retracted position, the engaging part engages with the operating part of the push rod, and the retracting operation of the feed arrow causes the operating part to resist the biasing force of the rod biasing means from the first position. Move to second position. In conjunction with this, the push rod moves to the protruding position, and the rear end of the bar is pushed out of the bar receiving area. Therefore, the bar can be extruded by utilizing the back and forth movement of the feed arrow.

Furthermore, in another embodiment of the present invention, the feed arrow surrounds the bar receiving area and extends further forward from the contact surface beyond the front end of the finger member. And a cylindrical portion for guiding. The rear end portion of the bar is guided toward the contact surface by the cylindrical portion, and the rear end of the bar is reliably in contact with the contact surface.

  Furthermore, the above-mentioned object of the present invention is to provide a bar supply machine that feeds a bar to be processed along a feed axis to a processing part of the bar processing machine by a feed arrow, and a bar processing machine that processes the bar The bar material feeder has a guide rail that extends along the feed axis and guides the bar material to the bar material machine, and an abutment against the rear end of the bar material. A feed arrow that has a contact surface and feeds the bar toward the bar processing machine while pushing the bar that is in contact with the contact surface along the guide rail, and moves the feed arrow back and forth in the feed direction. The bar processing machine has a predetermined contact surface upstream of the product processing position of the bar processing machine in order to process the bar with the bar processing machine. Having a controller that controls the arrowhead drive means to stop the arrowhead when it reaches the distance position. It can also be achieved by bar machining system according to symptoms.

  According to the present invention, it is possible to provide a bar material feeder and a bar material processing system capable of easily and automatically performing product processing that requires both-end processing.

  Hereinafter, embodiments of a bar processing system and a bar feeder according to the present invention will be described with reference to the drawings. FIG. 1 is a front view of a bar processing system according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line 2-2 shown in FIG.

  As shown in FIG. 1, the bar processing system S in the present embodiment has a feed axis 1A to which the bar B is fed in order to feed the bar B to be processed along its longitudinal axis. A bar feeder 1 extending in the longitudinal direction from the upstream side, ie, the rear side to the downstream side, ie, the front side, and a downstream side of the bar feeder, positioned at a predetermined distance from the bar feeder. And a bar processing machine N. It is necessary that the relative positional relationship between the bar supply machine and the bar processing machine does not change, for example, the bar supply machine and the bar processing machine may be fixed to each other, May be fixed to the floor. The bar processing machine N is, for example, a main spindle fixed NC lathe. In the following description, it is assumed that the bar processing machine is a spindle-fixed NC lathe. This NC lathe N has a headstock N1, a main spindle N2 arranged above the main spindle N1 and extending along the feeding axis 1A, and a machining part N3 arranged on the downstream side of the main spindle N2. Yes. The main shaft N2 has a main shaft through hole N4 for receiving the bar B fed from the bar feeder 1 and extending coaxially with the feed axis 1A. A collet chuck N5 for gripping the bar B is provided at the downstream end of the spindle through hole N4. In the present specification, the position of the cut-off tool N6 for cutting through the bar in the processing unit N3 is referred to as a product processing position NS that serves as a reference position for processing the bar B. The parting tool N6 is provided so as to be movable parallel to the feeding axis 1A. The position of the cut-off tool N6 is previously positioned at a position to cut through the end of the bar to be processed. That is, the product processing position NS coincides with the position of the end face after the processing of the bar B fed to the bar processing machine N.

  As shown in FIGS. 1 and 2, the bar feeder 1 extends along the support frame 2 and the feed axis 1A and guides the bar B supported by the support frame 2 to the NC lathe N. Guide rail 4 and an abutting surface 6 that abuts against the rear end of the bar B (see FIG. 3), and an NC lathe along the guide rail 4 while pushing the bar B abutted against the abutting surface 6 A feed arrow 8 for feeding toward N, a feed arrow driving device 10 for moving the feed arrow 8 back and forth in the feed direction, and a bar (new material) provided on the side of the guide rail 4 ) A rod stocking device 12 for feeding B into the guide rail 4 (see FIG. 2), and a rod stocking device 14 for removing the bar B brought back from the NC lathe N after machining from the guide rail 4 (see FIG. 2). To prevent runout by gripping bar B while machining bar B with NC lathe N. It has a steady rest device 16 and a controller 18 that controls various devices included in the rod feeder 1 such as the feed arrow drive device 10, the rod feeding device 12, the rod removing device 14, and the like.

  First, the guide rail 4 will be described. As shown in FIG. 1, the guide rail 4 has a plurality of guide rail portions arranged in the longitudinal direction, and is specifically fixed to the downstream side of the frame 2. It has a fixed guide rail portion 4A and a pivot guide rail portion 4B which is arranged on the upstream side of the frame and can be pivoted around a pivot axis 24 (see FIG. 2). The pivot guide rail portion 4B is further divided into a plurality of portions (three in the present embodiment), and an anti-skid device 16 is provided between the pivot guide rail portions 4B adjacent to each other. . As shown in FIG. 2, the guide rail 4 has a U-shaped cross section, and has an opening 20 for receiving a bar taken out from the material shelf 40 by the bar feeding device 12 at the upper part, and a bar inside the guide rail 4. An internal space 22 in which the material B and the feed arrow 8 move is formed. The pivot guide rail portion 4B is provided to be rotatable about a pivot 24 between a bar feed position 26 with the opening 20 facing upward and a bar exclusion position 28 with the opening 20 directed obliquely downward. ing. The pivot guide rail portion 4B is rotated by a drive (not shown) and its movement is controlled by the controller 18.

  Next, the feed arrow driving device 10 will be described. The feed arrow drive device 10 is for moving the feed arrow 8 back and forth along the feed axis 1A. When the controller 18 is turned ON / OFF by the controller 18, the feed arrow 8 is moved back and forth or stopped at a predetermined position. Or The feed arrow driving device 10 basically includes a servo motor 30, a ball screw 32 operatively connected to the output shaft of the servo motor 30, and a ball screw nut 34 screwed into the ball screw 32. In the illustrated embodiment, the feed arrow driving device 10 further includes a linear guide device 36 disposed on both sides of the ball screw 32, a ball screw nut 34, a connecting member 38 that connects the linear guide device 36 and the feed arrow 8. It has the structure which can move the sending arrow 8 straightly. The ball screw nut 34 and the linear guide device 36 extend parallel to the feeding axis 1A. The connecting member 38 includes a horizontal connecting member 38a that extends in the horizontal direction by being connected to the ball screw nut 34 and the linear guide device 36, and a vertical connecting member 38b that hangs down from the horizontal connecting member 38a. The vertical connecting member 38 b is connected to the rear end portion of the feed arrow 8 accommodated in the internal space 22.

Further, the rod feeding device 12 will be described. The rod feeding device 12 is placed on the side of the guide rail 4 and placed on the material shelf 40 for placing a plurality of rods (new materials) B, and the material shelf 40. There is a bar takeout device 42 for taking out the bar B one by one from the material shelf 40. The material shelf 40 includes a bar mounting surface 44 that is inclined downward so that the bar B rolls toward the guide rail 4, a stopper surface 46 that rises from the end of the bar mounting surface 44, and a stopper surface 46. And a guide surface 48 inclined downward from the end toward the guide rail 4. The guide surface 48 extends to the opening 20 of the guide rail 4 in order to guide the bar B to the guide rail 4. The rod material take-out device 42 has a lifting member 42a that can move upward to lift the rod material B so as to get over the stopper surface 46. The bar material take-out device 42 is controlled by the controller 18 so as to take out the bar materials closest to the guide rail 4 out of the bar materials placed on the material shelf 40 one by one and put them into the guide rail 4.
Furthermore, the bar removing device 14 pivots the guide rail 4B from a bar feeding position 26 (shown by a solid line in FIG. 2) to a bar removing position 28 (shown by a dotted line in FIG. 2) (see FIG. 2). And a bar recovery shelf 50 aligned with the opening 20 of the guide rail 4B at the bar exclusion position 28. The bar recovery shelf 50 is inclined downward as it moves away from the guide rail 4B.

Next, the feed arrow 8 will be described in detail. FIG. 3 is a longitudinal sectional view of the front end portion of the feed arrow. FIG. 4 is a longitudinal sectional view of the rear end portion of the feed arrow. FIG. 5 shows the front end face of the feed arrow.
As shown in FIGS. 3 and 4, the feed arrow 8 has three cylindrical members. Specifically, the main body portion 56 arranged on the upstream side, that is, the rear end side and connected to the connecting member 38. And a finger chuck portion 58 disposed on the downstream side, that is, the front end side, and a chuck joint portion 60 that couples the finger chuck portion 58 to the main body portion 56 so as to be rotatable about a longitudinal axis. Specifically, the finger chuck portion 58 is fixed to the chuck joint portion 60, and a bearing 74 is provided between the chuck joint portion 60 and the main body portion 56.

  The finger chuck portion 58 has a contact surface 6 that is directed forward and presses the rear end surface of the bar B. The contact surface 6 extends in the lateral direction with respect to the feeding axis. The finger chuck portion 58 of the feed arrow 8 extends forward of the abutting surface 6 and includes a gripping position 62a for gripping the rear end portion of the bar B and a release position 62b for releasing the rear end portion of the bar B. Finger member 62 movable between the two. The finger chuck portion 58 has a bar receiving area 66 constituted by a space surrounded by the finger member 62 and the contact surface 6. Further, the finger chuck portion 58 guides the rear end portion of the bar B extending further forward from the contact surface 6 beyond the front end of the finger member 62 so as to surround the bar receiving region 66. It has a cylindrical part 58a for this purpose. The inner diameter of the cylindrical portion 58a is slightly larger than the outer diameter of the bar.

  The finger members 62 will be described in detail. In the present embodiment, three finger members 62 are provided as shown in FIG. 5 and are arranged at equal intervals in the circumferential direction of the cylindrical finger chuck portion 58. Has been. As shown in FIG. 3, each of the finger members 62 has a proximal end portion 80 disposed on the rear side in the longitudinal direction, a pivot 82 located in the middle, and a distal end portion 84 disposed on the front side, It is provided so as to be pivotable about a pivot 82. In the finger member 62 located at the gripping position 62a, the proximal end portions 80 are moved away from each other, and the distal end portions 84 are moved closer to each other. On the other hand, the finger member 62 located at the release position 62b has a base end portion 80 formed by a finger biasing device 88 that biases the finger member 62 toward the release position 62b of the finger driving device 64 described later. They are close to each other and the tips 84 are spaced apart from each other. More specifically, the finger urging device 88 is an O-ring, and is disposed on the outer periphery of the finger member 62 on the proximal end portion 80 side with respect to the pivot 82. The tip portions 84 are kept in the release position 62b that is brought close to each other and kept away from each other. When the finger member 62 is in the release position 62b, the O-ring 88 is in a contracted state, and when the finger member 62 is in the gripping position 62a, the O-ring 88 is in an expanded state. The proximal end portion 80 of the finger member 62 is biased by the O-ring 88 that is going to be in the contracted state from the expanded state.

  Further, the cylindrical portion 58a has a finger accommodating region that receives the tip end portion 84 of the finger member 62 when the finger member 62 moves from the gripping position 62a to the release position 62b. In this embodiment, the cylindrical wall 58a has a peripheral wall. It is comprised by the hole 76 formed in this. The distal end portion 84 of the finger member 62 is curved along the cylindrical portion 58a, and is entirely accommodated in the finger accommodating region in the hole 76 at the release position 62b. Since it does not protrude into the bar receiving area in the cylindrical portion 58a, the bar surely comes into contact with the contact surface 6 without any obstacle. Further, at the release position 62b of the finger member 62, the distal end portion 84 of the finger member 62 is regulated so as to abut against the inner wall of the cylindrical portion 58a so as not to protrude out of the hole 76. 4 can move back and forth smoothly. For the same reason, the cylindrical portion 58a preferably has the same outer diameter as the other portion 58b of the finger chuck portion 58.

  The feed arrow 8 further includes a finger driving device 64 that moves the finger member 62 between the gripping position 62a and the release position 62b. The finger driving device 64 includes a finger urging device 88 that urges the finger member 62 to the release position 62b, and a finger driving shaft provided in the body portion 56 of the feeding arrow 8 so as to be movable back and forth in parallel with the feeding axis 1A. 90 and an air cylinder 84 connected to the finger drive shaft 90 and serving as an actuator for moving the finger drive shaft 90 back and forth. The finger drive shaft 90 extends coaxially with the longitudinal axis of the feed arrow 8. The finger drive shaft 90 extends into the main body portion 56, the chuck joint portion 60, and the finger chuck portion 58, and is provided to be slidable back and forth with respect to the main body portion 56. A bearing 96 is disposed between the finger drive shaft 90 and the chuck joint portion 60 so that the finger chuck portion 58 and the chuck joint portion 60 rotate around the finger drive shaft 90.

  Moreover, the front-end | tip part 90a of the finger drive shaft 90 has the front surface 90b which makes a taper shape toward the front. The opposing surfaces of the base end portions 80 of the three finger members 62 are inclined surfaces 62b that are inclined from the pivot 82 side toward the distal end of the base end portion 80 toward the radially outward direction of the finger chuck portion 58. A shaft receiving region 69 for receiving the tip end portion 90a of the finger drive shaft 90 is formed therebetween.

  In the present embodiment, the actuator 84 is an air cylinder that can be controlled by the controller 18, and the finger drive shaft 90 moves back and forth by the movement of the rod of the air cylinder 84. That is, the air cylinder 84 has a finger so that the finger drive shaft 90 is also advanced when its rod is advanced from the retracted position to the extended position, and the finger drive shaft 90 is also retracted when it is retracted from the extended position to the retracted position. Interlocked with the drive shaft 90. In the non-actuated position where the finger member 62 is in the release position 62b, the front end 90a of the finger drive shaft 90 is located near the entrance (rear position) in the shaft receiving area 69. When the finger drive shaft 90 is advanced by the rod of the air cylinder 84, the front end portion 90a of the finger drive shaft 90 moves forward in the shaft receiving region 69 and resists the urging force by the O-ring 88, thereby preventing the front end portion 90a. The front surface 90 b of the finger member 62 moves forward along the inclined surface 62 b of the finger member 62, enters between the proximal end portions 80 of the finger member 62, and spreads the proximal end portion 80 of the finger member 62. Is pivoted from the release position 62b to the gripping position 62a.

Furthermore, the feed arrow 8 in this embodiment includes a push rod 70 for extruding the bar B received in the bar receiving area 66 formed by the space surrounded by the finger member 62 and the contact surface 6. , And a rod urging device 72 that urges the push rod 70. The finger drive shaft 90 has a through hole 98 extending in the longitudinal direction, and the push rod 70 is provided in the through hole 98 so as to extend in the longitudinal direction on the longitudinal center axis of the feed arrow B. . More specifically, the push rod 70 is provided such that the distal end portion 70c is movable between a protruding position 70a that protrudes into the bar receiving area 66 and a retracted position 70b that is retracted from the bar receiving area 66. . The push rod 70 is urged to the retracted position 70b by the rod urging member 72. Specifically, the push rod 70 is slidably provided in the through hole 98 of the finger drive shaft 90, and the rear end portion 70 d protrudes rearward of the finger drive shaft 90. The rod urging device 72 is a spring that urges the rear end portion 70 d of the push rod 70 backward with respect to the finger drive shaft 90. The push rod 70 is located at the first position 100a (see FIG. 6B) when in the retracted position 70b, and is located at the second position 100b (see FIG. 6A) when in the protruding position 70a, and interlocked with the push rod 70. And an actuating part 100 that performs. It is preferable that the operation part 100 protrudes from the main body part 56 of the feed arrow 8. In the present embodiment, the operating unit 100 is configured by a rear end portion 70 a of the push rod 70. The operating unit 100 that is linked to the push rod 70 is also urged to the second position 100 b by the rod urging device 72.
The frame 2 is engaged with the operating unit 100 when the feed arrow 8 that has brought back the finished bar B is located in the vicinity of the retracted position, and the operating unit 100 is connected to the rod by the retracting operation of the feed arrow 8. An engaging portion 104 that moves from the first position 100a to the second position 100b against the urging force of the urging device 72 is provided.

Next, the operation of the bar feeder according to the present invention will be described with reference to FIGS. 2 and 6 (a) to 6 (i). Hereinafter, in the case where parts are formed by processing both ends of the bar B, the case where the rear end of the bar B has already been processed and the front end is processed by the current processing will be described as an example. The bar B having the rear end opened is longer than the final product length L by the machining allowance α. In processing the front end, it is necessary to end-process the bar B to L which is the final product length. There is. Therefore, the rear end surface of the bar B is positioned at a position moved up to a predetermined distance L from the product machining position NS on the NC lathe N to the upstream side, stopped at that position, and collet chuck N5 of the NC lathe N. It is necessary to set the length L to a predetermined length by gripping the bar and performing end face machining by the machining allowance α protruding downstream from the product machining position NS. Hereinafter, the operation of positioning the bar B at the above position and the bar processing will be specifically described.
The distance from the rear end of the bar B to the product processing position of the NC lathe N bar processing machine is the length of the bar to be finished by the end face processing in the current processing in which the rear end of the bar is processed. Equal to the finished length dimension of the product. In this machining, the final product length L of the component is stored in the controller 18 in advance.

  Initially, as shown in FIG. 6 (a), the feed arrow 8 is in a retracted position in the rear portion of the guide rail 4, and the operating portion 100 of the push rod 70 is located at the second position 100b. 70c is in the protruding position 70a, and the finger member 62 is located in the release position 62b. Only one bar B is fed from the material shelf 40 to the front position of the feed arrow 8 in the guide rail 4B by the bar feeding device 12. In detail, as shown in FIG. 2, the bar B previously placed on the material shelf 40 rolls on the bar mounting surface 44 and stops at the stopper surface 46. When the bar B stopped on the stopper surface 46 is lifted along the stopper surface 46 by the lifting member 42a, the lifted bar B rolls along the guide surface 48 and passes through the opening 20 of the guide rail 4B. Rolls down into the internal space 22.

  Next, as shown in FIG. 6B, the controller 18 controls the feed arrow driving device 10 to advance the feed arrow 8. Specifically, the ball screw 32 is rotated by the servo motor 30, whereby the ball screw nut 34 screwed into the ball screw 32 is advanced, and the feed arrow 8 connected via the connecting member 38 is advanced. . While the feed arrow 8 is moved forward, the controller 18 counts the number of rotations of the servo motor 30 by an encoder (not shown), and the movement distance of the ball screw 32, that is, the contact surface 6 of the feed arrow 8 in particular. Detect forward distance. When the feed arrow 8 is advanced, the rear end of the push rod 70, that is, the operating portion 100 is released from the engaging portion 104 and is urged rearward by the rod urging device 72, and the second position 100 b is changed to the first position 100 a. Moving. As a result, the push rod 70 moves from the protruding position 70 a to the retracted position 70 b, and the distal end portion 70 c retracts from the bar material receiving area 66. During this time, the finger member 62 is maintained in the release position 62b.

Next, as shown in FIG. 6C, the feed arrow 8 is advanced, the rear end of the bar B is brought into contact with the contact surface 6, and the rear of the bar B is contacted by the contact surface 6 of the feed arrow 8. The bar B is advanced by pushing the end face. Since the finger member 62 is maintained at the release position 62b, when the bar B is pushed by the feed arrow 8, it is guided to the cylindrical portion 58a, and the finger member 62 is surely placed behind the bar B without becoming an obstacle. The end contacts the contact surface 6.
Next, as shown in FIG. 6D, the feed arrow 8 is further advanced, and the controller 18 determines that the contact surface 6 of the feed arrow 8 has reached a position at a predetermined distance L from the product processing position NS. At this time, the controller 18 stops the bar drive device 10 and stops the feed arrow 8. At this time, since the rear end surface of the bar B is at the position of the contact surface 6, the rear end surface of the bar B is at a predetermined distance L from the product processing position NS of the NC lathe N.

  Next, at this position, as shown in FIG. 6 (e), the tip of the bar B is gripped by a collet chuck (not shown) of the NC lathe N, and the front end of the bar B is processed. The end face of the front end of the bar B is processed so that the length of the bar B is L, and the front end of the bar B is processed into a predetermined shape. During the bar processing, the finger member 62 is located at the release position 62b, so that the rear end portion of the bar b can freely rotate in the cylindrical portion 58a. When there is rotational resistance due to force or the like, the finger chuck portion 58 is rotatably supported by the chuck joint portion 60, and thus rotates together with the finger chuck portion 58. After finishing the processing, the bar B is released from the collet chuck (not shown).

Next, as shown in FIG. 6 (f), the air cylinder 84 is controlled by the controller 18 to advance the finger drive shaft 90, and the front end portion 90 a of the finger member 62 resists the urging force of the O-ring 88. The base member 80 enters between the base end portions 80 and spreads them to move the finger member 62 from the release position 62b to the gripping position 62a. Thereby, the rear end portion of the bar B is gripped by the finger member 62. During this time, the push rod 70 remains in the retracted position 70b.
Next, the servo motor 30 is reversed by the controller 18, whereby the ball screw 32 is rotated in the opposite direction to that shown in FIG. 6B, and thereby the ball screw nut 34 that is screwed onto the ball screw 32. Moves backward, and the feed arrow 8 connected via the connecting member 38 moves backward. As a result, as shown in FIG. 6G, the controller 18 moves the feed bar 8 backward while keeping the finger member 62 at the gripping position 62 a and brings the bar B back to the bar feeder 1.

  Next, as shown in FIG. 6 (h), when the controller 18 determines that the feed arrow 8 has reached a predetermined position near or in front of the retracted position, the controller 18 stops the feed arrow driving device 10 and stops the feed arrow. 8 stops at that position. The predetermined position is stored in advance in the controller 18. When the finger drive shaft 90 is retracted by the air cylinder 84 in a state where the operating portion 100 of the push rod 70 is not yet pushed by the engaging portion 104, the front end portion 90 a is the shaft between the base end portions 80 of the finger members 62. Withdrawing from the receiving area 69 and the urging force of the O-ring 88 brings the proximal ends 80 of the finger members 62 closer to each other, and the finger members 62 move from the gripping position 62a to the release position 62b. Thereby, the bar B is released from the finger member 62.

Next, as shown in FIG. 6 (i), the feed arrow 8 is further retracted while the finger member 62 is maintained at the release position 62 b by the controller 18. By the backward movement of the feed arrow 8, the operating part 100 is engaged with the engaging part 104, and the engaging part 104 resists the urging force of the rod urging device 72 from the first position 100 a to the second position. Move to position 100b. In conjunction with this, the tip 70c of the push rod 70 moves from the retracted position 70b to the protruding position 70a, protrudes into the bar receiving area 66, and pushes the processed bar B out of the bar receiving area 66. put out.
Next, the controller 18 pivots the guide rail 4B from the bar feed position 26 to the bar exclusion position 28, whereby the bar rolls out of the guide rail 4B and moves along the bar collection shelf 50. And then recovered (see Fig. 2).

As described above, the case where the rear end of the bar B has already been processed and the front end is processed in this processing has been described. However, the bar feeder according to the present invention is a bar that has been processed at one end. This is useful not only when the other end of the product is processed, but also when the rear end of the bar is not processed, that is, when the end of the product to be processed is processed. In this case, the predetermined distance may be, for example, a distance (L + α) obtained by adding the machining allowance α to the full length finishing dimension L of the product. In this case, the distance (L + α) is stored in the controller 18 in advance. In this case, one end of the bar is processed in accordance with the steps of FIGS. 6A to 6I described above, and the bar recovered in the bar recovery rack 50 in the last step is continuously stored in the material rack. 40, the front and back are placed in opposite directions, that is, the end on the side where the processing is finished is placed toward the upstream side. In the processing of the other end of the bar B, as described above, the controller 18 stores the numerical value L, which is the final product length, and the other end of the bar B is moved to the position shown in FIGS. It suffices to process according to the process.
Whether the product is long or short, it can be processed in the same process. When the length of the bar B is shorter than the length of the main shaft N2, the front end of the feed arrow 8 enters the main shaft through hole N4 and feeds the bar B to a predetermined position. become.

  As mentioned above, although the bar feeder which is embodiment of this invention was demonstrated, this invention is not limited to this embodiment, A various change is possible within the range of the invention described in the claim. Needless to say, these are also included in the scope of the present invention.

  In the above embodiment, the bar feeder 1 is an apparatus for gripping the bar B composed of the finger members 62 and the like, and an apparatus for extruding the bar composed of the push rod 70 and the like from the feed arrow 8. However, if only the bar B is positioned at a predetermined distance from the product processing position NS, they may be omitted. In addition, the push rod 70 is preferably provided for reliably removing the bar B from the bar receiving area, but is not necessarily provided.

In the above embodiment, although three finger members are used, the number and shape of the finger members are arbitrary as long as the rear end portion of the processed bar B can be reliably gripped, and other numbers and shapes It may be.
In the embodiment, the main body portion 56, the finger drive shaft 90, and the push rod 70 of the feed arrow 8 have a triple structure, but the push rod 70 is disposed in parallel with the feed axis 1A and is a bar. As long as B can be reliably extruded from the bar receiving region 66, it is not necessary to be disposed inside the finger drive shaft 90, and it may be disposed outside the finger drive shaft 90.
Moreover, in the said embodiment, although the operation part 100 of the finger drive shaft 90 and the push rod 70 protrudes behind the main-body part 56 of the sending arrow 8, if it can be moved to the front-back direction, it will be behind the main-body part 56. It does not need to protrude and may protrude from the side surface of the main body 56.

Furthermore, in the above embodiment, the finger chuck portion 58 is provided so as to be rotatable with respect to the main body portion 56. However, if the structure is such that the rotation of the bar is not hindered, the finger chuck portion 58 is It may be a structure fixed to.
Furthermore, in the above embodiment, various mechanisms of the bar feeder are controlled by the controller 18 provided in the bar feeder 1, but the bar provided by the controller provided on the bar processing machine N side is controlled. You may control a material supply machine.

  In the above embodiment, the bar is positioned on the bar feeder 1 side. However, as usual, a stopper and a sensor for pressing the tip of the bar on the bar processing machine N side are provided. In addition, when both ends of the bar are processed at the end on the side to be processed first, the bar may be positioned and processed as usual. The sensor detects that the front end surface of the bar has come into contact with the stopper, and this detection signal is sent to the controller 18. When the controller 18 receives this signal, the servo motor of the bar drive device 10 is turned OFF to stop the feed arrow 8, and then the collet chuck N5 of the bar processing machine N is closed to start processing. When processing the other end, the bar supply machine 1 according to this embodiment may be positioned on the bar supply machine 1 side.

1 is a schematic front view of a bar processing system according to the present invention. It is a fragmentary sectional view in line 2-2 of the bar processing system of FIG. It is longitudinal direction sectional drawing of the front-end part of a sending arrow. It is longitudinal direction sectional drawing of the rear-end part of a sending arrow. Indicates the front end face of the feed arrow. It is a figure which shows operation | movement of the bar processing system of FIG. It is a figure which shows operation | movement of the bar processing system of FIG. It is a figure which shows operation | movement of the bar processing system of FIG. It is a figure which shows operation | movement of the bar processing system of FIG. It is a figure which shows operation | movement of the bar processing system of FIG. It is a figure which shows operation | movement of the bar processing system of FIG. It is a figure which shows operation | movement of the bar processing system of FIG. It is a figure which shows operation | movement of the bar processing system of FIG. It is a figure which shows operation | movement of the bar processing system of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bar supply machine 1A Feed axis 4 Guide rail 6 Contact surface 8 Feeding arrow 10 Feeding arrow drive device 18 Controller 56 Feeding arrow main-body part 58 Finger chuck part 58a Cylindrical part 62 Finger member 62a Holding position 62b Release position 64 Finger Drive device 66 Bar material receiving area 70 Push rod 70a Projection position 70b Retraction position 70c Tip 72 Rod biasing device 80 Base end 82 Axis 88 Finger biasing device 90 Finger drive shaft 100 Actuator 100a First position 100b Second position 104 Engagement section B Bar N Bar processing machine NS Product processing position S Bar processing system

Claims (7)

A bar feeder that feeds a bar to be processed along a feed axis to a processing part of a bar processing machine by a feed arrow,
A guide rail extending along the feed axis for guiding the bar to the bar processing machine;
A feed arrow that has a contact surface that contacts the rear end of the bar, and feeds the bar toward the bar processing machine while pushing the bar that contacts the contact surface along the guide rail; ,
Feed arrow driving means for moving the feed arrow back and forth in the feed direction;
In order to process the bar with the bar processing machine, the length to be processed is stored in advance, and the contact surface should be processed upstream of the product processing position of the bar processing machine in the feed direction. as stops the feed rod when it is determined to have reached the position of the length, it has a, and a controller for controlling the feed rod driving means,
The feed arrow has a cylindrical portion extending forward from the contact surface, and an inner diameter of the cylindrical portion is in contact with the contact surface so that a rear end of a bar is in contact with the contact surface. A bar feeder that is larger than the outer diameter of the rear end portion of the bar disposed in contact with the cylindrical portion . The feed arrow extends forward of the abutting surface and has at least two finger members movable between a gripping position for gripping a rear end portion of the bar and a release position for releasing the rear end of the bar. Finger drive means for moving the at least two finger members between a gripping position and a release position;
The controller maintains the finger member in the released position while the feed arrow is advanced to the position to be processed, and moves the finger member back while retracting the feed arrow to bring back the bar. The bar feeder according to claim 1, which is controllable to maintain the gripping position. Each of the at least two finger members is provided so as to be pivotable about a pivot located in the middle of the longitudinal direction,
The finger drive means includes: a finger drive shaft provided in a manner that can move back and forth in the main body of the feed arrow in parallel with a feed axis; and distal ends of the at least two finger members are separated from each other; Finger urging means for urging the finger member at the approached release position;
The controller is controllable to advance or retract the finger drive shaft, and when the finger drive shaft advances, a front end portion thereof resists a biasing force by the finger biasing means. When entering between the proximal ends of the finger members and unfolding it, the at least two finger members are pivoted from the release position to the gripping position, and when the finger drive shaft is retracted, the at least The bar feeder according to claim 2, wherein the proximal ends of the two finger members are pivoted again by the finger urging means to approach each other and move from the gripping position to the release position. The space surrounded by the finger member and the contact surface constitutes a receiving area for receiving the bar rear end,
The feed arrow further has a push rod for extruding the bar material received in the receiving area, and the push rod protrudes into the receiving area and a retracted position in which the push rod is retracted from the receiving area. The bar feeder according to claim 3, which is movably provided between the two. The feed arrow further has rod urging means for urging the push rod to the retracted position,
The push rod is located at the first position when in the retracted position, and at the second position when in the protruding position, and has an operating portion that interlocks with the push rod;
Furthermore, it has an engaging part that operates the operating part, which is fixed to the bar supply machine body,
In the vicinity of the retreating position of the feed arrow where the processed bar is taken back and removed, the engagement portion engages with the operation portion of the push rod, and the operation portion is attached to the rod by the retreating operation of the feed arrow. The bar feeder according to claim 4, wherein the bar feeder is moved from the first position to the second position against the biasing force of the biasing means. The cylindrical portion surrounds the bar receiving area and extends further forward from the contact surface beyond the front end of the finger member, and guides the rear end of the bar to the contact surface. The bar feeder according to any one of 1 to 5. This is a bar processing system having a bar supply machine that feeds a bar to be processed along a feed axis by a feed arrow to a processing section of the bar processing machine, and a bar processing machine that processes the bar. And
The bar feeder includes a guide rail that extends along a feeding axis for guiding the bar to the bar processing machine, and a contact surface that contacts the rear end of the bar, and the contact surface A feed arrow for feeding the bar toward the bar processing machine while pushing the bar abutted on the guide rail, and a feed arrow driving means for moving the feed arrow back and forth in the feed direction Have
In order to process the bar with the bar processing machine, the bar processing machine stores in advance the length of the bar to be processed, and the abutment surface feeds from the product processing position of the bar processing machine. as it stops the feed rod when it is determined to have reached the position upstream the length to be processed, have a controller for controlling the feed rod driving means,
The feed arrow has a cylindrical portion extending forward from the contact surface, and an inner diameter of the cylindrical portion is in contact with the contact surface so that a rear end of a bar is in contact with the contact surface. A bar processing system characterized by being larger than the outer diameter of the rear end portion of the bar disposed in contact with the cylindrical portion .

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