JP5468352B2 - Cutting method for rod-shaped workpiece - Google Patents

Description

  The present invention relates to a method for cutting a rod-shaped workpiece such as a long extruded material, a rod-shaped workpiece cutting device, and an extrusion rear surface equipment. In the present specification and claims, “upstream” and “downstream” mean upstream and downstream in the workpiece feed direction of the feed roller, respectively.

  For example, an extrusion facility for producing an extruded material generally includes an extruder and an extrusion rear surface facility. The extrusion rear surface equipment includes a cutting device that cuts a long extruded material extruded from the extruder into a predetermined length from the tip. This cutting device is usually configured to cut a plurality of extruded materials in a lump in parallel in the left-right direction in order to increase cutting efficiency.

  When a plurality of extruded materials are cut by the cutting device as described above, it is necessary to align the tip positions of these extruded materials in order to determine the cutting length of these extruded materials.

  Japanese Patent Application Laid-Open No. 9-174325 (Patent Document 1) discloses that when a plurality of long materials arranged in parallel in the left-right direction are collectively cut by a cutting means provided in a cutting apparatus, A method for aligning the tip positions of these long materials by bringing the tip into contact with a stopper member is disclosed. In this method, when the leading ends of these long materials fed by the feed roller are brought into contact with the stopper member, the forward movement of the long materials is restricted, so that the cutting means can be moved from the leading ends of the long materials. The cutting length to the workpiece cutting position is determined. And a long material is cut | disconnected by a cutting | disconnection means in this state, and a cut product (product) of predetermined length is obtained.

  An example of this type of conventional cutting apparatus using a stopper member will be described below with reference to FIG.

  In FIG. 8, 110 is a conventional cutting device, 140 is a rod-shaped workpiece such as a long material (including extruded material), 114 is a cutting machine (cutting means) that cuts the workpiece 140 into a predetermined length, and 121 is a stopper. A member 113 is a feed roller.

  FIG. 8A is a schematic side view of the conventional cutting device 110 showing a state in which the workpiece 140 is being fed by the feed roller 113 in the direction F from the cutting machine 114 toward the stopper member 121. FIG. 8B is a schematic side view of the cutting device 110 showing a state in which the tip 140a of the workpiece 140 is in contact with the stopper member 121. FIG.

  As shown in FIG. 8A, the stopper member 121 is a position separated from the workpiece cutting position C of the cutting means 114 by the workpiece cutting length L in order to determine the workpiece cutting length L by the cutting machine 114. S is arranged in advance. This position S is called “fixed position (fixed position)”.

  In the cutting device 110, a plurality of workpieces 140 arranged in parallel in the left-right direction are collectively fed from the cutting machine 114 toward the stopper member 121 by the feed roller 113. Then, as shown in FIG. 8B, when the tip 140a of the workpiece 140 abuts against the stopper member 121, the forward movement of the workpiece 140 is restricted and the cutting length L of the workpiece 140 is determined.

JP-A-9-174325

  Conventionally, when the tip 140a of the workpiece 140 is brought into contact with the stopper member 121 in this manner, the tip 140a of the workpiece 140 is reliably brought into contact with the stopper member 121, and / or the tips of all the workpieces 140 are contacted. In order to bring 140a into contact with the stopper member 121, a predetermined time (for example, about 5 seconds) is uniformly applied regardless of the workpiece cutting length L or the workpiece remaining length after the tip 140a of the leading workpiece 140 contacts the stopper member 121. ) The feed roller 113 was driven to rotate. During this time, the forward movement of the workpiece 140 is restricted with the tip 140a of the workpiece 140 being pressed against the stopper member 121, and each feed roller 113 is driven to rotate at the same position relative to the workpiece 140. As a result, as shown in FIG. 9, slip traces 142 made of a glossy pattern that is locally darker than the other portions at the slip rotation position 142 of each feed roller 113 in the workpiece 140 are in the axial direction of the feed roller 113 (that is, In some cases, it extends in the width direction of the workpiece 140. This slip mark 143 is also called a “slip mark”.

  When the slip mark 143 is formed on the workpiece 140, a cut piece obtained by cutting the workpiece 140 has a poor appearance and cannot be used as a product. This problem occurs not only when there are a plurality of workpieces 140 but also when there is only one.

  The present invention has been made in view of the above-described technical background, and an object of the present invention is to form a slip mark due to slip rotation driving of a feed roller when a rod-shaped work is cut to a predetermined length from its tip. An object of the present invention is to provide a rod-shaped workpiece cutting method capable of preventing problems, a rod-shaped workpiece cutting device used in the cutting method, and an extrusion rear surface equipment equipped with the cutting device.

  The present invention provides the following means.

[1] A method for cutting a rod-shaped workpiece, in which the rod-shaped workpiece is cut to a predetermined length from its tip by a cutting means,
An overrun step of overrunning the tip of the rod-shaped workpiece fed by the feed roller to the downstream side of the fixed position separated from the workpiece cutting position of the cutting means downstream from the workpiece cutting length;
A pushing-back step of pushing back the tip of the work overrun downstream from the fixed position to the fixed position with a push-back member;
A cutting step of cutting the work whose tip is pushed back to the fixed position by the cutting means;
A method for cutting a rod-shaped workpiece characterized by comprising:

  [2] The method for cutting a bar-shaped workpiece according to item 1 above, wherein the push-back member is a stopper member that restricts the forward movement of the workpiece.

  [3] The method for cutting a bar-shaped workpiece according to item 1 or 2, wherein in the push-back step, the feed roller is freely rotated.

  [4] The rod-like workpiece cutting method according to any one of the preceding items 1 to 3, wherein the overrun step includes a detection step of detecting by a sensor that the tip of the workpiece has passed the fixed position downstream.

  [5] The overrun step includes a feed stop step of stopping the feed of the workpiece by the feed roller after the tip of the workpiece is overrun until the tip of the workpiece comes into contact with the pushback member. The cutting method of the rod-shaped workpiece in any one of the preceding items 1-4.

[6] The workpiece is a plurality of rod-shaped workpieces arranged in parallel,
6. The rod-shaped workpiece cutting method according to any one of the preceding items 1 to 5, wherein in the overrun step, all the tips of the plurality of workpieces are overrun to the downstream side of the fixed position.

[7] A rod-shaped workpiece cutting device for cutting a rod-shaped workpiece to a predetermined length from its tip,
Cutting means for cutting the rod-shaped workpiece into a predetermined length;
Push-back means provided with a push-back member disposed downstream of the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the push-back member;
Including
The push-back means uses the push-back member to push the tip of the workpiece overrun downstream from a fixed position separated from the workpiece cutting position of the cutting means downstream from the workpiece cutting position by the feed roller. A bar-shaped workpiece cutting device characterized by being pushed back to a fixed position.

  [8] The rod-shaped workpiece cutting device according to [7], wherein the push-back member is a stopper member that restricts the forward movement of the workpiece.

  [9] The rod-shaped workpiece cutting device according to item 7 or 8, wherein the feed roller can be switched between a drive rotation and a free rotation.

  [10] The cutting apparatus for a bar-shaped workpiece according to any one of the above items 7 to 9, further including a sensor that detects that the tip of the workpiece has passed the fixed position to the downstream side.

  [11] The push-back means is disposed at the stop position, the changing means for changing the push-back member to a stop position that restricts the forward movement of the work and a non-stop position that does not restrict the forward movement of the work. The rod-shaped workpiece cutting device according to any one of the preceding items 7 to 10, further comprising a driving unit that moves the pushed-back member that is moved in a direction opposite to the workpiece feeding direction.

[12] The changing means includes a base arranged to be movable in parallel with the workpiece feed direction, and a rotary rod rotatably supported on the base, and by a rotating operation of the rotary rod. The push-back member provided on the rotary rod is configured to be changed from the non-stop position to the stop position,
The drive means has base drive means for moving the base parallel to the workpiece feed direction,
The push-back means drives the base drive means so that the base moves in the direction opposite to the workpiece feeding direction, so that the push-back member arranged at the stop position is applied to the tip of the work. 12. The bar-shaped workpiece cutting device according to 11 above, which is configured to contact and push the tip of the workpiece back to the fixed position.

  [13] Extrusion characterized by comprising the rod-shaped workpiece cutting device according to any one of items 7 to 12 above, wherein the extruded material extruded from the extruder is cut into a predetermined length from the tip thereof as a rod-shaped workpiece. Rear equipment.

  The present invention has the following effects.

  According to the invention of [1], in the push-back process, the feed roller is not necessarily driven to slip rotation by pushing back the tip of the work overrun downstream from the fixed position to the fixed position by the stopper member. Even if it does not make it, the front-end | tip of a workpiece | work can be made to contact | abut reliably to a stopper member, and the malfunction by which a slip trace is formed in a workpiece | work by this can be prevented. Alternatively, even if the feed roller is driven to slip and rotate with respect to the workpiece when the tip of the workpiece comes into contact with the stopper member, the slip rotation position of the feed roller in the workpiece is changed along with the workpiece push-back operation. Since it moves continuously in the direction, it is possible to prevent a problem that slip marks are formed on the workpiece.

  According to the invention of [2], the forward movement of the workpiece can be restricted by the stopper member.

  According to the invention of [3], when the feed roller is rotated freely in the push-back process, the feed roller follows the work push-back direction according to the work push-back operation when pushing the tip of the work back to a fixed position. It is rotated. As a result, the tip of the workpiece can be easily pushed back to a fixed position, the workpiece can be reliably prevented from being damaged by sliding movement of the workpiece on the feeding roller, and the wear roller can be prevented from being deformed by wear. Can be suppressed.

  According to the invention of [4], it can be reliably detected that the tip of the workpiece has passed the fixed position downstream.

  According to the invention of [5], after the tip of the workpiece is overrun and before the tip of the workpiece comes into contact with the stopper member, the feeding of the workpiece by the feed roller is stopped, so that the tip of the workpiece becomes the stopper. When contacting the member, the feed roller is not driven to rotate with respect to the workpiece. Therefore, it is possible to reliably prevent a problem that slip marks are formed on the workpiece.

  According to the invention of [6], by causing all the tips of the plurality of workpieces to overrun downstream from the fixed position, the tips of all the workpieces can be collectively pushed back to the fixed position in the push-back process. As a result, a plurality of workpieces can be collectively cut in the cutting step.

  According to the inventions [7] to [10], it is possible to provide a rod-shaped workpiece cutting device that can be suitably used for the rod-shaped workpiece cutting method according to the inventions [1] to [4].

  According to the inventions [11] and [12], it is possible to provide a cutting device provided with push-back means that can reliably push back the tip of the workpiece to a fixed position.

  According to the invention of [13], it is possible to provide an extrusion rear surface equipment capable of preventing a problem that slip traces due to slip rotation driving of the feed roller are formed on the extruded material.

FIG. 1 is a schematic plan view of an extrusion rear surface equipment equipped with an extruded material cutting device as a rod-shaped workpiece cutting device according to an embodiment of the present invention. FIG. 2 is a perspective view of the cutting apparatus in a state where the extruded material as a work is overrun to the downstream side from the fixed position. FIG. 3 is a schematic plan view of the cutting apparatus sequentially illustrating steps of cutting the extruded material. FIG. 4 is a schematic side view of the push-back means sequentially illustrating steps of pushing back the tip of the extruded material using the push-back means according to the first configuration example of the cutting apparatus. FIG. 5: is a schematic side view of the push-back means which shows in order the process of pushing back the front-end | tip of an extrusion material using the push-back means which concerns on the 2nd structural example of the same cutting device. FIG. 6A is a schematic plan view of the push-back means for explaining the push-back means according to the third configuration example of the cutting apparatus, and shows a state in which the extruded material is fed toward the stopper member. . FIG. 6B is a schematic side view of the push-back means in the state of FIG. 6A. FIG. 6C is a schematic plan view of the push-back means showing a state in which a stopper member is brought into contact with the tip of the extruded material. FIG. 6D is a schematic side view of the push-back means in the state of FIG. 6C. FIG. 6E is a schematic plan view of the push-back means showing a state in which the tip of the extruded material is pushed back to a fixed position. FIG. 6F is a schematic side view of the push-back means in the state of FIG. 6E. FIG. 7A is a schematic plan view of the push-back means for explaining the push-back means according to the fourth configuration example of the cutting apparatus, and shows a state in which the extruded material is fed toward the stopper member. . FIG. 7B is a schematic side view of the push-back means in the state of FIG. 7A. FIG. 7C is a schematic plan view of the push-back means showing a state in which a stopper member is brought into contact with the distal end of the extruded material. FIG. 7D is a schematic side view of the push-back means in the state of FIG. 7C. FIG. 7E is a schematic plan view of the push-back means showing a state where the tip of the extruded material is pushed back to a fixed position. FIG. 7F is a schematic side view of the push-back means in the state of FIG. 7E. FIG. 8 is a schematic side view of a cutting device that sequentially shows steps of cutting a workpiece using a conventional cutting device for a bar-shaped workpiece. FIG. 9 is a bottom view of the workpiece showing a state in which slip marks are formed on the contact surface (bottom surface of the workpiece) of the workpiece with the feed roller.

  Next, several embodiments of the present invention will be described below with reference to the drawings.

  In FIG. 1, 1 is the extrusion back surface equipment which concerns on one Embodiment of this invention. The extrusion rear surface equipment 1 includes an extruder 2, an initial table 3, a run-out table 4, a cooling table 5, a stretch table 6, a storage table 7, and a rod-like workpiece cutting device 10 according to an embodiment of the present invention. ing. The bar-shaped workpiece cut by the cutting device 10 is a long bar-shaped aluminum (including its alloy) extruded material 40. Hereinafter, the rod-shaped workpiece is referred to as an extruded material 40.

  In the extrusion rear surface equipment 1, the long extruded material 40 extruded from the extruder 2 sequentially travels on the initial table 3 and the run-out table 4, and then the run-out table 4 by a transfer device (not shown). From the top, it is sequentially transferred onto the cooling table 5, the stretch table 6, the storage table 7, and the saw charge table 11 of the cutting device 10.

  On the cooling table 5, the extruded material 40 is cooled by cooling means (not shown) such as a cooling fan. On the stretch table 6, the bending of the extruded material 40 is straightened by stretchers 6a and 6a (head stock and tail stock). On the storage table 7, a plurality of extruded materials 40 are arranged in an orderly manner. These extruded materials 40 are placed on the saw charge table 11 in parallel in the left-right direction.

  The length of the extruded material 40 extruded from the extruder 2 is, for example, in the range of 15 to 60 m, and the width and thickness (height) of the extruded material 40 are each in the range of, for example, 5 to 600 mm. The cross-sectional shape of the extruded material 40 is a substantially mountain shape or an upward substantially E shape (see FIG. 2). However, in the present invention, the length, width, and thickness of the extruded material 40 are not limited to being within the above ranges, and the cross-sectional shape of the extruded material 40 is not limited.

  The cutting device 10 includes the saw charge table 11, cutting means 14, saw gauge table 12, push-back means 20, inspection table 17, sensor 15, control means 16, and the like.

  The cutting means 14 cuts the extruded material 40 into a predetermined length sequentially from the tip thereof, and is constituted by a cutting machine having a saw blade (not shown), for example.

  In FIG. 1, C is an extruded material cutting position of the cutting means 14. L is an extruded material cutting length from the tip 40a of the extruded material 40. S is a predetermined position separated from the extruded material cutting position C by a cutting length L on the downstream side. Therefore, if the extruded material 40 is cut by the cutting means 14 when the tip 40a of the extruded material 40 is located at this position S, a cut piece 41 having a desired cutting length L is obtained. This position S is called “fixed position (fixed position)”. The extruded material cutting length L is, for example, in the range of 1 to 25 m. The cut piece 41 is used as an extrusion material used for sash materials, vehicle materials, heat sink materials, conveyor frame materials, and the like. However, in the present invention, the cutting length L is set according to the use of the cutting piece 41 and the like, and is not limited to being within the above range.

  Further, the arrangement position of the cutting means 14 and the extruded material cutting position C of the cutting means 14 are fixed.

  As shown in FIG. 2, the saw charge table 11 is disposed on the entrance side of the cutting means 14, and is provided with a plurality of feed rollers 11 a that are spaced apart from each other and feed the extruded material 40 to the cutting means 14. Yes.

  The saw gauge table 12 is disposed on the exit side of the cutting means 14, and is provided with a plurality of feed rollers 12a that are spaced apart from each other and feed the extruded material 40 and its cut piece 41.

  The push-back means 20 includes a stopper member 21 as a push-back member, a change means 22, a drive means 23, and the like. In FIG. 2, neither the changing means 22 nor the driving means 23 is shown.

  The stopper member 21 is for restricting the forward movement of the extruded material 40 overrun downstream from the fixed position S and for pushing the tip 40a of the extruded material 40 back to the fixed position S, and is formed in a flat plate shape. It is arranged downstream of the cutting means 14. The stopper member 21 can be changed by the changing means 22 so that it can be changed between a stop position that restricts the forward movement of the extruded material 40 and a non-stop position that does not restrict the forward movement of the extruded material 40. Therefore, it is configured to be movable in a direction G opposite to the extruded material feed direction F. The surface (stop surface) of the stopper member 21 is formed in a flat shape and is disposed perpendicular to the extruded material feed direction F.

  In the present embodiment, the stop position is a position in front of the extruded material feed direction F. The non-stop position is a position deviated with respect to the extruded material feed direction F. Specifically, the non-stop position is a position deviated upward with respect to the extruded material feed direction F.

  Both the feed roller 11 a of the saw charge table 11 and the feed roller 12 a of the saw gauge table 12 have a role of feeding the extruded material 40 in the direction from the cutting means 14 toward the stopper member 21. Further, these feed rollers 11a and 12a are configured so that the rotation mode can be switched between drive rotation and free rotation. For convenience of explanation, unless otherwise specified, in this specification, the feed roller 11a and the feed roller 12a are collectively referred to as “feed roller 13”.

  On the feed roller 13, a plurality of extruded materials arranged in parallel in the left-right direction are placed horizontally. In this embodiment, the number of extruded materials is two.

  The specific configuration of the pushback means 20 will be described later.

  The sensor 15 detects that the tip 40a of each extruded material 40 has passed the fixed position S downstream, and is disposed above the fixed position S through which the tip 40a of each extruded material 40 passes. More specifically, it is disposed immediately above the fixed position S.

  1 and 3, when the sensor 15 is illustrated directly above the fixed position S, the alternate long and short dash line indicating the fixed position S overlaps the sensor 15, so that the two do not overlap. The sensor 15 is illustrated at a position slightly shifted to the downstream side.

  The sensor 15 is a transmissive photoelectric sensor, a reflective photoelectric sensor, or the like that is commercially available as a non-contact sensor.

  The control means 16 controls the operations of the feed roller 13, the push-back means 20, and the cutting means 14 based on the detection information detected by the sensor 15, and includes a computer having a ROM, a RAM, a CPU, and the like. Yes. A program for performing predetermined control is preinstalled in the computer.

  As shown in FIG. 1, the cut piece 41 is placed on the inspection table 17 in order to perform various inspections such as an appearance inspection on the cut piece 41 of the extruded material 40.

  Next, the cutting method of the extruded material 40 using the cutting device 10 of this embodiment is demonstrated below with reference to FIG.

  3, FIG. 3 (a) is a schematic side view of the cutting device 10 showing a state in which the extruded material 40 is fed by the feed roller 13 in the direction from the cutting means 14 toward the stopper member 21. FIG. FIG. 3B is a view showing a state in which the tip 40 a of the extruded material 40 is overrun from the fixed position S to the downstream side. FIG. 3C is a view showing a state where the tip 40 a of the extruded material 40 is pushed back to the fixed position S by the stopper member 21. FIG. 3D is a view showing a state in which the extruded material 40 is cut by the cutting means 14. FIG. 3E is a view showing a state in which the stopper member 21 is arranged at the non-stop position and the cut piece 41 of the extruded material 40 is sent to the downstream side of the stopper member 21.

  First, as shown in FIG. 3A, a plurality of (two in the present embodiment) extruded materials 40 arranged in parallel in the left-right direction on the saw charge table 11 are fed from the cutting means 14 to the stopper member 21 by the feed roller 13. Send in a batch toward the direction. At this time, the stopper member 21 is arranged in advance as a stop position at a position on the downstream side (front side) in the extruded material feed direction F with respect to the fixed position S. Moreover, the tip positions of these extruded members 40 arranged on the saw charge table 11 are slightly shifted in the front-rear direction relative to each other. The extrusion material feed speed is set within a range of 10 to 60 m / min, for example.

  The tip 40 a of the extruded material 40 fed by the feed roller 13 passes through the cutting means 14 and advances toward the stopper member 21. Even during the feeding operation, the tip positions of the extruded members 40 are slightly shifted in the front-rear direction relative to each other.

  And as shown in FIG.3 (b), the front end 40a of all the extrusion materials 40 is overrun downstream from the fixed position S by the feed roller 13 (refer FIG. 2). This process is called an “overrun process”. The amount of overrun is set within a range of 10 to 300 mm, for example. In this overrun process, when the tip 40 a of the extruded material 40 exceeds the fixed position S on the downstream side, the information is detected by the sensor 15. This process is called “detection process”. Detection information detected by the sensor 15 is transmitted to the control means 16. If the sensor 15 detects that the tips 40a of all the extruded materials 40 have exceeded the fixed position S, that is, if the tips 40a of all the extruded materials 40 have overrun downstream from the fixed position S, then at least one The feed of the extruded material 40 is stopped by stopping the rotational driving of the feed roller 13 until the tip 40a of the extruded material 40 (eg, the tip 40a of the first extruded material 40) contacts the stopper member 21. This process is called “feed stop process”. Then, the rotation form of the feed roller 13 is set to free rotation.

  Next, as shown in FIG. 3C, the stopper member 21 is moved in the direction G opposite to the extruded material feed direction E, so that the stopper member 21 is brought into contact with the distal end 40a of the extruded material 40 and these are moved. The distal end 40a of the extruded material 40 is collectively pushed back to the fixed position S by the stopper member 21. This process is called “push-back process”. The pushing-back speed of the stopper member 21 is set within a range of 5 to 40 m / min, for example.

  In this push-back process, the stopper member 21 abuts against the tips 40a of the extruded materials 40, so that the tips of the extruded materials 40 are aligned at a time. At this time, since the feed roller 13 has already been switched to free rotation, the feed roller 13 is driven to rotate in the push-back direction of the extruded material 40 in accordance with the push-back movement of the extruded material 40.

  Next, as shown in FIG. 3 (d), these extruded materials 40 are collectively cut by the cutting means 14. This process is called a “cutting process”.

  Next, as shown in FIG. 3E, the stopper member 21 is disposed at a position deviated upward with respect to the extruded material feed direction F as a non-stop position. Then, the cut pieces 41 of the extruded material 40 are collectively fed to the downstream side of the saw gauge table 12 by the feed roller 12 a of the saw gauge table 12. Thereafter, the steps of FIGS. 3A to 3E are repeated. Note that the cut pieces 41 sent to the downstream side of the saw gauge table 12 are collectively transferred from the saw gauge table 12 onto the inspection table 17 (see FIG. 1).

  The operation control of the feed roller 13 in these steps (for example, stopping the rotation drive of the feed roller 13 and switching to the free rotation of the feed roller 13), the operation control of the stopper member 21, the operation control of the cutting means 14, etc. This is performed by the control means 16 based on the detection information detected by the sensor 15.

  Thus, the above-described cutting method of the extruded material 40 has the following advantages.

  In the pushing-back process, the feed roller 13 is not necessarily driven to slip-rotate with respect to the extruded material 40 by pushing the tip 40a of the extruded material 40 overrun downstream from the fixed position S back to the fixed position by the stopper member 21. Even if it does not exist, the front end 40a of the extruded material 40 can be reliably brought into contact with the stopper member 21, thereby preventing a problem that a slip mark is formed on the extruded material 40.

  Further, in the overrun process, after the tip 40a of the extruded material 40 is overrun, the feeding of the extruded material 40 by the feed roller 13 is stopped until the tip 40a of the extruded material 40 contacts the stopper member 21. Therefore, when the front end of the extruded material 40 comes into contact with the stopper member 21, the feed roller 13 is not driven to rotate with respect to the extruded material 40. Therefore, it is possible to reliably prevent a problem that slip marks are formed on the extruded material 40.

  Furthermore, in the push-back process, since the rotation form of the feed roller 13 is switched to free rotation, when the front end 40a of the extruded material 40 is pushed back to the fixed position S, the feed roller 13 pushes in accordance with the push-back operation of the extruded material 40. The material 40 is rotated following the pushing-back direction G of the material 40. Thereby, the front end 40a of the extruded material 40 can be easily pushed back to the fixed position S, and the extruded material 40 can be reliably prevented from being damaged due to the sliding movement of the extruded material 40 on the feed roller 13. In addition, wear deformation of the feed roller 13 can be prevented.

  Further, in the overrun process, the sensor 15 detects that the tip 40a of the extruded material 40 has exceeded the fixed position S to the downstream side, so that the tip 40a of the extruded material 40 has exceeded the fixed position S to the downstream side. It can be detected reliably.

  Furthermore, in the overrun process, since the tips 40a of all the extruded materials 40 are overrun downstream from the fixed position S, all the tips 40a of the extruded materials 40 are collectively placed in the fixed position S in the pushback process. As a result, all the extruded materials 40 can be cut at once in the cutting step.

  Here, in the above-described embodiment, the feed roller 13 stops feeding the extrusion material 40 after the tip 40a of the extrusion material 40 is overrun until the tip 40a of the extrusion material 40 comes into contact with the stopper member 21. I am letting. However, in the present invention, in addition, after the tip 40a of the extruded material 40 is overrun, the extruded material 40 is continuously fed by the feed roller 13 without stopping the feeding of the extruded material 40 by the feed roller 13, The distal end 40 a of the extruded material 40 may be brought into contact with the stopper member 21. In this case, when the front end 40a of the extruded material 40 comes into contact with the stopper member 21, the feed roller 13 is driven to slip and rotate with respect to the extruded material 40. Since the slip rotation position of the material continuously moves in the axial direction of the extruded material 40 in accordance with the push-back operation of the extruded material 40, a problem that slip marks are formed on the extruded material 40 can be prevented. Further, in the push-back process, the tip 40a of the extruded material 40 can be pushed back to the fixed position S in a state where the tip 40a of the extruded material 40 is pressed against the stopper member 21, thereby reliably fixing the tip 40a of the extruded material 40. It can be arranged at position S.

  Furthermore, the present invention fixes the feed roller 13 in a rotation stopped state in the push-back process, or moves the feed roller 13 in the direction G opposite to the extrusion material feed direction F (ie, the moving speed of the stopper material 21). It is not excluded to drive the rotation at a lower speed than the push-back speed of the tip 40a. Even in these cases, the slip rotation position of the feed roller 13 in the extruded material 40 continuously moves in the axial direction of the extruded material 40 as the extruded material 40 is pushed back. Problems that are formed can be prevented.

  Of course, in this embodiment, since the stopper member 21 is used as the pushback member, the forward movement of the extruded material 40 can be reliably regulated. In the present invention, the push-back member may be any member as long as it exerts an action of pushing back the tip 40a of the extruded material (work) 40 overrun downstream from the fixed position S to the fixed position S. It is not necessary to have the effect of restricting the forward movement. However, as in the present embodiment, it is desirable to use the stopper member 21 that exerts the action of regulating the forward movement of the extruded material 40 as the pushback member.

  Next, specific configurations and operations of some push-back means 20 in the cutting device 10 of the present embodiment will be described below with reference to FIGS. 4 to 7E.

  Push-back means of the first configuration example shown in FIG. 4, push-back means of the second configuration example shown in FIG. 5, push-back means of the third configuration example shown in FIGS. 6A to 6F, and FIGS. Each push-back means of the fourth configuration example includes the stopper member 21, the changing means 22, the driving means 23, etc. as described above.

  The change means 22 arrange | positions the stopper member 21 so that a change is possible to the stop position which regulates the advance movement of the extrusion material 40, and the non-stop position which does not restrict the advance movement of the extrusion material 40. FIG.

  The drive means moves the stopper member 21 arranged at the stop position in the direction G opposite to the extruded material feed direction F.

<First configuration example>
The push-back means 20 of the first configuration example shown in FIG. 4 will be described below.

  In FIG. 4, FIG. 4A is a schematic side view of the push-back means 20 showing a state in which the extruded material 40 is fed in the direction toward the stopper member 21. FIG. 4B is a view showing a state in which the stopper member 21 is brought into contact with the tip 40 a of the extruded material 40. FIG. 4C is a view showing a state where the tip 40 a of the extruded material 40 is pushed back to the fixed position S by the stopper member 21.

  The changing means 22 of the pushing-back means 20 has a lever rod 26 and a fluid pressure cylinder 24 as the driving means 23. As the fluid pressure cylinder 24, a hydraulic cylinder, a gas cylinder, or the like is used.

  The insulator rod 26 has an intermediate portion in the length direction as a fulcrum portion 26a, is supported by the fulcrum portion 26a so as to be swingable, and is sent downstream from the cutting means (not shown). It is arranged on the upper side of the roller 13. A horizontal rotation shaft 26d that is orthogonal to the extruded material feed direction F and extends in a horizontal direction (that is, the left-right direction) is inserted into the fulcrum portion 26a of the lever rod 26. 26 is pivotally supported by the fulcrum portion 26a.

  The lever rod 26 has one end portion and the other end portion as a force point portion 26b and an action point portion 26c, respectively. The fluid pressure cylinder 24 is fixedly disposed below the force point portion 26b of the lever rod 26, and the distal end portion of the telescopic rod 24a of the fluid pressure cylinder 24 is pivotally attached to the force point portion 26b of the lever rod 26. . The base end portion of the stopper member 21 is fixedly attached to the action point portion 26c of the lever rod 26. The stopper member 21 is changed to a non-stop position and a stop position via the lever rod 26 by the extension and shortening operations of the telescopic rod 24a of the fluid pressure cylinder 24.

  The changing means 22 extends the expansion / contraction rod 24a of the fluid pressure cylinder 24 to change the stopper member 21 from the non-stop position to the stop position, and shortens the expansion / contraction rod 24a, thereby stopping the stopper member 21. Is changed from a stop position to a non-stop position.

  The push-back means 20 further extends the expansion / contraction rod 24a by operating the stopper member 21 that is changed from the non-stop position to the stop position by extending the expansion / contraction rod 24a of the fluid pressure cylinder 24. The tip 40 a of the extruded material 40 is pushed back to the fixed position S by the stopper member 21.

  Next, a push-back process using the push-back means 20 of the first configuration example will be described below.

  As shown in FIG. 4A, when the tip 40a of the extruded material 40 is overrun from the fixed position S to the downstream side, the telescopic rod 24a of the fluid pressure cylinder 24 is extended. As a result, as shown in FIG. 4B, the stopper member 21 is disposed from the non-stop position to the stop position and abuts against the tip 40 a of the extruded material 40. Subsequently, the telescopic rod 24a of the fluid pressure cylinder 24 is further extended. Thereby, as shown in FIG.4 (c), the front-end | tip 40a of the extrusion material 40 is pushed back to the fixed position S with the stopper member 21. FIG.

  As described above, by performing the push-back process using the push-back means 20 of the first configuration example, the tip 40a of the extruded material 40 can be reliably pushed back to the fixed position S.

  In the present invention, the fluid pressure cylinder 24 may be disposed in a fixed state, for example, at the position indicated by the one-dot chain line in FIG. 4A, that is, above the force point portion 26b of the lever rod 26. In this case, the changing means 22 shortens the telescopic rod 24a of the fluid pressure cylinder 24 to change the stopper member 21 from the non-stop position to the stop position, and extends the telescopic rod 24a to extend the stopper member. 21 is configured to be changed from a stop position to a non-stop position. Further, the push-back means 20 pushes the stopper member 21, which is changed from the non-stop position to the stop position by shortening the telescopic rod 24a of the fluid pressure cylinder 24, by further shortening the telescopic rod 24a. The front end 40 a of the extruded material 40 is pushed back to the fixed position S by being brought into contact with the front end 40 a of the material 40.

<Second configuration example>
The push-back means 20 of the second configuration example shown in FIG. 5 will be described below.

  In FIG. 5, FIG. 5A is a schematic side view of the push-back means 20 showing a state in which the extruded material 40 is fed in the direction toward the stopper member 21. FIG. 5B is a view showing a state in which the stopper member 21 is brought into contact with the tip 40 a of the extruded material 40. FIG. 5C is a view showing a state in which the tip 40 a of the extruded material 40 is pushed back to the fixed position S by the stopper member 21.

  The changing means 22 of the pushback means 20 includes a rotary rod 27 and a fluid pressure cylinder 24 as the driving means 23. As the fluid pressure cylinder 24, a hydraulic cylinder, a gas cylinder, or the like is used.

  The rotary rod 27 is rotatably supported at a middle portion in the longitudinal direction of the rotary rod 27 on a horizontal rotary shaft 27a that is orthogonal to the extruded material feed direction F and extends in the horizontal direction (that is, the left-right direction). Yes. The horizontal rotation shaft 27a is disposed on the downstream side of the cutting means (not shown) and above the feed roller 13.

  A fluid pressure cylinder 24 is fixedly attached to the tip of the rotary rod 27. Further, a stopper member 21 is fixedly attached to the distal end portion of the telescopic rod 24a of the fluid pressure cylinder 24.

  The changing means 22 is configured to change the stopper member 21 from the non-stop position to the stop position by the rotation operation of the rotary rod 27.

  The push-back means 20 pushes the stopper member 21 against the tip 40a of the extruded material 40 by extending the telescopic rod 24a of the fluid pressure cylinder 24 in a state where the stopper member 21 is disposed at the stop position. The front end 40 a of the material 40 is configured to be pushed back to the fixed position S by the stopper member 21.

  Next, a push-back process using the push-back means 20 of the second configuration example will be described below.

  As shown in FIG. 5A, when the tip 40a of the extruded material 40 is overrun from the fixed position S to the downstream side, the rotary rod 27 is rotated. Thereby, as shown in FIG.5 (b), the stopper member 21 is arrange | positioned from a non-stop position to a stop position. Next, the telescopic rod 24a of the fluid pressure cylinder 24 is extended. Accordingly, as shown in FIG. 5C, the stopper member 21 is brought into contact with the tip 40 a of the extruded material 40, and the tip 40 a of the extruded material 40 is pushed back to the fixed position S by the stopper member 21.

  As described above, by performing the push-back process using the push-back means 20 of the second configuration example, the tip 40a of the extruded material 40 can be reliably pushed back to the fixed position S.

<Third configuration example>
The push-back means 20 of the third configuration example shown in FIGS. 6A to 6F will be described below.

  The changing means 22 of the pushback means 20 includes a rotary rod 28 and a fluid pressure cylinder 24 as the driving means 23. As the fluid pressure cylinder 24, a hydraulic cylinder, a gas cylinder, or the like is used.

  The rotary rod 28 is rotatably supported at one end portion (base end portion) of the rotary rod 28 on a parallel rotation shaft 28a extending in parallel with the extruded material feed direction F. The parallel rotation shaft 28 a is disposed on the downstream side of the cutting means (not shown) and on one side of the left and right sides of the feed roller 13.

  A fluid pressure cylinder 24 is fixedly attached to the tip of the rotary rod 28. Further, a stopper member 21 is fixedly attached to the distal end portion of the telescopic rod 24a of the fluid pressure cylinder 24.

  The changing means 22 is configured to change the stopper member 21 from the non-stop position to the stop position by the rotation operation of the rotary rod 28.

  The push-back means 20 pushes the stopper member 21 against the tip 40a of the extruded material 40 by extending the telescopic rod 24a of the fluid pressure cylinder 24 in a state where the stopper member 21 is disposed at the stop position. The tip 40a of the material 40 is configured to be pushed back to the fixed position S.

  Next, a push-back process using the push-back means 20 of the third configuration example will be described below.

  As shown in FIGS. 6A and 6B, when the tip 40a of the extruded material 40 is overrun from the fixed position S to the downstream side, the rotary rod 28 is rotated. Thereby, as shown to FIG. 6C and 6D, the stopper member 21 is arrange | positioned from a non-stop position to a stop position. Next, the telescopic rod 24a of the fluid pressure cylinder 24 is extended. 6E and 6F, the stopper member 21 is brought into contact with the distal end 40a of the extruded material 40, and the distal end 40a of the extruded material 40 is pushed back to the fixed position S by the stopper member 21.

  As described above, by performing the push-back process using the push-back means 20 of the third configuration example, the tip 40a of the extruded material 40 can be reliably pushed back to the fixed position S.

<Fourth configuration example>
The push-back means 20 of the fourth configuration example shown in FIGS. 7A to 7F will be described below.

  The changing means 22 of the push-back means 20 has a base 29 and a rotary rod 30.

  The base 29 is arranged to be movable in parallel with the extruded material feed direction F along a rail (not shown). The base 29 is provided with a parallel rotation shaft 30a extending in parallel with the extruded material feed direction F. The rotary rod 30 is rotatably supported at one end (base end portion) of the rotary rod 30 on the parallel rotary shaft 30a. The base 29 and the parallel rotating shaft 30a are arranged on one side of the left and right sides of the feed roller 13 on the downstream side of the cutting means (not shown). A stopper member 21 is fixedly attached to the tip of the rotary rod 30.

  The changing means 22 is configured to change the stopper member 21 from the non-stop position to the stop position by the rotation operation of the rotary rod 30.

  The drive means 23 has base drive means 25 for moving the base 29 in parallel with the extruded material feed direction F. As the base drive means 25, for example, a fluid pressure cylinder (hydraulic cylinder, gas cylinder, etc.) is used.

  The push-back means 20 drives the base drive means 25 so that the base 29 moves in the direction G opposite to the extruded material feed direction F in a state where the stopper member 21 is disposed at the stop position. The member 21 is brought into contact with the distal end 40 a of the extruded material 40, and the distal end 40 a of the extruded material 40 is pushed back to the fixed position S by the stopper member 21.

  Next, a push-back process using the push-back means 20 of the fourth configuration example will be described below.

  As shown in FIGS. 7A and 7B, when the tip 40a of the extruded material 40 is overrun from the fixed position S to the downstream side, the rotary rod 30 is rotated. Thereby, as shown to FIG. 7C and 7D, the stopper member 21 is arrange | positioned from a non-stop position to a stop position. Next, the base driving means 25 is driven so that the base 29 moves in the direction G opposite to the extruded material feed direction F. 7E and 7F, the stopper member 21 is brought into contact with the distal end 40a of the extruded material 40, and the distal end 40a of the extruded material 40 is pushed back to the fixed position S by the stopper member 21.

  Thus, by performing the push-back process using the push-back means 20 of the fourth configuration example, the tip 40a of the extruded material 40 can be reliably pushed back to a fixed position.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the present invention. .

  Moreover, in the said embodiment, although the number of the workpiece | work (extrusion material 40) cut | disconnected by the cutting | disconnection means 14 is two, this invention is not limited to two, In addition, for example, There may be one, or three or more.

  In the present invention, the workpiece may be an extruded material as shown in the above embodiment, or may be another rod-like member. Furthermore, the workpiece material may be a metal such as aluminum or steel as shown in the above embodiment, may be a plastic, or may be another material.

  In the present invention, the push-back means may be configured by combining a plurality of push-back means 20 of the first to fourth configuration examples.

  INDUSTRIAL APPLICATION This invention can be utilized for the cutting method of rod-shaped workpieces, such as a long extruded material, the cutting apparatus for rod-shaped workpieces, and an extrusion back surface installation.

1: Extrusion equipment 10: Extruded material cutting device (bar-shaped workpiece cutting device)
13: Feed roller 14: Cutting means 15: Sensor 20: Push-back means 21: Stopper member (push-back member)
22: change means 23: drive means 24: fluid pressure cylinder 25; base drive means 26: insulator rod 27: rotating rod 28: rotating rod 29: base 30: rotating rod 40: extruded material (bar-shaped workpiece)
C: Extrusion material cutting position of the cutting means (work cutting position of the cutting means)
L: Extruded material cutting length (work cutting length)
S: Fixed position

Claims (11)

A method for cutting a rod-shaped workpiece by cutting the rod-shaped workpiece from its tip to a predetermined length by a cutting means,
An overrun step of overrunning the tip of the rod-shaped workpiece fed by the feed roller to the downstream side of the fixed position separated from the workpiece cutting position of the cutting means downstream from the workpiece cutting length;
A pushing-back step of pushing the tip of the workpiece back to the fixed position with the pushing-back member in a state where the pushing-back member is brought into contact with the tip of the workpiece overrun downstream from the fixed position;
A cutting step of cutting the work whose tip is pushed back to the fixed position by the cutting means;
With including,
A method of cutting a rod-shaped workpiece, wherein the pushing back step is performed with the feed roller rotating freely .   The rod-shaped workpiece cutting method according to claim 1, wherein the push-back member is a stopper member that restricts the forward movement of the workpiece. The rod-like workpiece cutting method according to claim 1 or 2 , wherein the overrun step includes a detection step of detecting by a sensor that the tip of the workpiece has passed the fixed position downstream. The overrun step includes a feed stop step of stopping the feed of the workpiece by the feed roller after the tip of the workpiece is overrun until the tip of the workpiece comes into contact with the push-back member. The cutting method of the rod-shaped workpiece in any one of -3 . The workpiece is a plurality of rod-shaped workpieces arranged in parallel,
The rod-like workpiece cutting method according to any one of claims 1 to 4 , wherein in the overrun step, all of the tips of the plurality of workpieces are overrun downstream from the fixed position. A rod-shaped workpiece cutting device for cutting a rod-shaped workpiece to a predetermined length from its tip,
Cutting means for cutting the rod-shaped workpiece into a predetermined length;
Push-back means provided with a push-back member disposed downstream of the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the push-back member;
Including
The push-back means abuts the push-back member on the tip of a work overrun downstream from a fixed position separated from the work cutting position of the cutting means downstream from the work cutting position of the cutting means by the feed roller. all SANYO pushing back the front end of the workpiece to the position by the push-back member while being,
The feed roller can be switched between driving rotation and free rotation,
The rotation form of the feed roller is switched to free rotation, and the tip of the workpiece is pushed back to the fixed position by the push-back member in a state where the push-back member is brought into contact with the tip of the workpiece. A cutting device for rod-shaped workpieces. The rod-shaped workpiece cutting device according to claim 6 , wherein the push-back member is a stopper member that restricts the forward movement of the workpiece. The rod-shaped workpiece cutting device according to claim 6 or 7 , further comprising a sensor that detects that the tip of the workpiece has passed the fixed position downstream. The push-back means includes a changing means for variably arranging the push-back member between a stop position that restricts the forward movement of the work and a non-stop position that does not restrict the forward movement of the work, and the push-back means arranged at the stop position. The rod-shaped workpiece cutting device according to any one of claims 6 to 8 , further comprising a drive unit that moves the push-back member in a direction opposite to the workpiece feeding direction. The changing means includes a base arranged to be movable in parallel with the workpiece feed direction, and a rotary rod rotatably supported on the base, and the rotation by the rotation operation of the rotary rod. The push-back member provided on the heel is configured to be changed from the non-stop position to the stop position,
The drive means has base drive means for moving the base parallel to the workpiece feed direction,
The push-back means drives the base drive means so that the base moves in the direction opposite to the workpiece feeding direction, so that the push-back member arranged at the stop position is applied to the tip of the work. The rod-shaped workpiece cutting device according to claim 9 , configured to contact and push the tip of the workpiece back to the fixed position. An extrusion rear surface equipment comprising the rod-shaped workpiece cutting device according to any one of claims 6 to 10 , wherein the extruded material extruded from the extruder is cut into a predetermined length from the tip thereof as a rod-shaped workpiece. .

Images