JP5520008B2 - Cutting method for rod-shaped workpiece - Google Patents

Description

  The present invention relates to a method for cutting a bar-shaped workpiece such as a long extruded material, a method for manufacturing a bar-shaped workpiece cut product, a bar-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. 9, 110 is a conventional cutting device, 140 is a rod-like workpiece such as a long material (including extruded material), 114 is a cutting means for cutting the workpiece 140 into a predetermined length, 121 is a stopper member, and 113 is It is a feed roller.

  FIG. 9A is a schematic side view of the conventional cutting device 110 showing a state in which the workpiece 140 is fed by the feed roller 113 in the direction F from the cutting means 114 toward the stopper member 121. FIG. 9B is a schematic side view of the cutting device 110 showing a state in which the tip 140 a of the workpiece 140 is in contact with the stopper member 121.

  As shown in FIG. 9A, the stopper member 121 is positioned at 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 means 114. S is arranged in advance. This position S is called “fixed position (fixed position)”.

  In this cutting device 110, a plurality of workpieces 140 arranged in parallel in the left-right direction are collectively fed from the cutting means 114 toward the stopper member 121 by the feed roller 113. 9B, when the tip 140a of the workpiece 140 contacts the stopper member 121, the forward movement of the workpiece 140 is restricted and the cutting length L of the workpiece 140 is determined at the same time. The workpiece cutting length L can be changed by moving the stopper member 121 in the upstream direction or the downstream direction with respect to the workpiece feeding direction F of the feeding roller 113.

JP-A-9-174325

  In the above-described conventional cutting device, when the peripheral speed of the feed roller 113 is rapidly reduced when the tip 140a of the workpiece 140 contacts the stopper member 121, the workpiece 140 slides on the feed roller 113 by its inertial force, Then stop. Thus, the distance that the workpiece 140 slides on the feed roller 113 from when the peripheral speed of the feed roller 113 is rapidly reduced to when the workpiece 140 stops is called a braking distance of the workpiece 140. The braking distance of the workpiece 140 decreases as the workpiece remaining length decreases.

  Thus, since the braking distance of the workpiece 140 varies depending on the remaining workpiece length, the workpiece 140 after the tip 140a of the workpiece 140 abuts against the stopper member 121 is used when the workpiece remaining length is long or short. The slip rotation drive time of the feed roller 113 with respect to 140 is different. That is, the slip rotation drive time of the feed roller 113 is longer when the workpiece remaining length is longer than when the workpiece remaining length is shorter.

  When the slip rotation driving time becomes longer in this way, as shown in FIG. 10, slip marks 143 made of a glossy pattern that is locally darker than the other portions are formed at the slip rotation position 142 of each feed roller 113 in the workpiece 140. In some cases, the feed roller 113 is formed to extend in the axial direction (that is, 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. Method for cutting rod-shaped workpiece capable of preventing inconveniences, method for manufacturing a rod-shaped workpiece cutting product using the cutting method, cutting device for rod-shaped workpiece used in the cutting method, and extrusion rear surface equipment provided with the cutting device Is to provide.

  The present invention provides the following means.

[1] Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a method of cutting a rod-shaped workpiece using a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A bar-shaped workpiece cutting method comprising: a feed roller control step of controlling driving and stopping of the feed roller so that the tip of the workpiece comes into contact with the stopper member according to a remaining workpiece length.

[2] The method further includes a detection step of detecting the tip of the workpiece by a sensor disposed upstream of the stopper member.
In the feed roller control step,
The circumferential speed V1 (where V1> 0) of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. The rod-shaped workpiece cutting method according to claim 1, wherein the driving of the feed roller is controlled and then the driving of the feed roller is stopped.

[3] In the feed roller control step,
3. The method for cutting a bar-shaped workpiece according to item 2 above, wherein V1 when the workpiece of the initial length is fed is determined in advance based on the braking distance of the workpiece of the initial length measured by the preliminary test.

[4] In the feed roller control step,
When the maintenance time of V1 from when the peripheral speed of the feed roller becomes V1 to when the drive of the feed roller is stopped is t1,
4. The method for cutting a bar-shaped workpiece according to 2 or 3 above, wherein the driving of the feed roller is controlled so that t1 becomes longer as the workpiece remaining length becomes shorter.

[5] In the feed roller control step,
When the maintenance time of the peripheral speed V0 of the feed roller from the detection of the workpiece tip by the sensor is t0,
5. The rod-shaped workpiece cutting method according to any one of the preceding items 2 to 4, wherein the driving of the feed roller is controlled so that t0 becomes longer as the remaining workpiece length becomes shorter.

[6] In the feed roller control step,
6. The bar-shaped workpiece cutting method according to any one of the preceding items 2 to 5, wherein the driving of the feed roller is controlled such that V1 increases as the workpiece remaining length decreases.

[7] In the feed roller control step,
When the deceleration rate per unit time from V0 to V1 is R,
7. The rod-shaped workpiece cutting method according to any one of items 2 to 6, wherein the driving of the feed roller is controlled so that R decreases as the workpiece remaining length decreases.

[8] The method further includes a detection step of detecting the tip of the workpiece by a sensor disposed upstream of the stopper member.
In the feed roller control step,
V0 is the peripheral speed of the feed roller when the workpiece tip is detected by the sensor.
When the maintenance time of the peripheral speed V0 of the feed roller from the detection of the workpiece tip by the sensor is t0,
The workpiece is slid on the feed roller by stopping the driving of the feed roller before the tip of the workpiece abuts against the stopper member, so that the tip of the workpiece abuts against the stopper member and the workpiece 2. The rod-shaped workpiece cutting method according to item 1 above, wherein the driving and stopping of the feed roller are controlled so that t0 becomes longer as the remaining length becomes shorter.

  [9] A method for producing a bar-shaped workpiece cut product, comprising cutting a bar-shaped workpiece by the method for cutting a bar-shaped workpiece according to any one of items 1 to 8.

[10] Cutting means for sequentially cutting the rod-shaped workpiece from the tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A bar-shaped workpiece cutting device comprising feed roller control means for controlling driving and stopping of the feed roller so that the tip of the workpiece contacts the stopper member according to the remaining workpiece length.

[11] Further, the sensor is disposed upstream of the stopper member, and includes a sensor for detecting the tip of the workpiece,
The feed roller control means includes
The circumferential speed V1 (where V1> 0) of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. 11. The bar-shaped workpiece cutting device according to item 10, wherein the driving of the feeding roller is controlled, and thereafter the driving of the feeding roller is stopped.

[12] The feed roller control means includes:
The V1 of the feeding roller is set so that V1 when feeding the workpiece of the initial length becomes the peripheral speed stored in advance in the feeding roller control means based on the braking distance of the workpiece of the initial length measured by the preliminary test. The rod-shaped workpiece cutting device according to 11 above, which controls driving.

[13] The feed roller control means includes:
When the maintenance time of V1 from when the peripheral speed of the feed roller becomes V1 to when the drive of the feed roller is stopped is t1,
13. The bar-shaped workpiece cutting device according to 11 or 12 above, wherein the driving of the feed roller is controlled so that t1 becomes longer as the workpiece remaining length becomes shorter.

[14] The feed roller control means includes:
When the maintenance time of the peripheral speed V0 of the feed roller from the detection of the workpiece tip by the sensor is t0,
14. The bar-shaped workpiece cutting device according to any one of the preceding items 11 to 13, wherein the driving of the feed roller is controlled so that t0 becomes longer as the workpiece remaining length becomes shorter.

[15] The feed roller control means includes:
15. The bar-shaped workpiece cutting device according to any one of the preceding items 11 to 14, wherein the driving of the feed roller is controlled such that V1 increases as the workpiece remaining length decreases.

[16] The feed roller control means includes:
When the deceleration rate per unit time from V0 to V1 is R,
16. The bar-shaped workpiece cutting device according to any one of the preceding items 11 to 15, which controls driving of the feed roller so that R decreases as the workpiece remaining length decreases.

[17] Further, the sensor is disposed upstream of the stopper member, and includes a sensor for detecting the tip of the workpiece,
The feed roller control means includes
V0 is the peripheral speed of the feed roller when the workpiece tip is detected by the sensor.
When the maintenance time of the peripheral speed V0 of the feed roller from the detection of the workpiece tip by the sensor is t0,
The workpiece is slid on the feed roller by stopping the driving of the feed roller before the tip of the workpiece abuts against the stopper member, so that the tip of the workpiece abuts against the stopper member and the workpiece 11. The rod-shaped workpiece cutting device according to item 10, wherein the driving of the feed roller is controlled and the driving stop is controlled so that t0 becomes longer as the remaining length becomes shorter.

  [18] An extrusion rear surface facility comprising the rod-shaped workpiece cutting device according to any one of the above items 10 to 17, which cuts the extruded material extruded from the extruder as a rod-shaped workpiece.

  The present invention has the following effects.

  According to the invention of [1], in the feed roller control step, the work remaining length is controlled by controlling driving and stopping of the feed roller so that the tip of the work comes into contact with the stopper member according to the work remaining length. Regardless of this, it is possible to shorten the slip rotation driving time of the feed roller with respect to the workpiece after the tip of the workpiece contacts the stopper member. Thereby, the malfunction that a slip trace is formed in a workpiece | work can be prevented, and also the abrasion deformation of a feed roller can be prevented.

  According to the invention [2], in the feed roller control step, the circumferential speed V1 of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. Then, the driving of the feed roller is controlled so that the driving of the feed roller is stopped. Thereby, the impact at the time of contact | abutting to the stopper member of the workpiece | work front-end | tip can be relieve | moderated.

  According to the invention of [3], when a workpiece having an initial length is cut, that is, when the workpiece is cut first, it is possible to prevent a problem that slip marks are formed on the workpiece.

  According to the invention of [4], when the work remaining length is shortened by controlling the driving of the feed roller so that t1 becomes longer as the work remaining length becomes shorter (that is, of the extruded material). Even when the braking distance is shortened), the tip of the workpiece can be reliably brought into contact with the stopper member.

  According to the invention of [5], by controlling the driving of the feed roller so that t0 becomes longer as the remaining workpiece length becomes shorter, the workpiece tip is applied to the stopper member from the time when the workpiece tip is detected by the sensor. The time until contact can be shortened. Thereby, cutting time can be shortened.

  According to the invention of [6], by controlling the driving of the feed roller so that V1 is increased as the workpiece remaining length is shortened, the workpiece leading end to the stopper member at the workpiece leading end is detected. The time until contact can be shortened. Thereby, cutting time can be shortened.

  In the invention of [7], even if the workpiece remaining length is shortened by controlling the driving of the feed roller so that R becomes smaller as the workpiece remaining length becomes shorter, the tip of the workpiece is stopped by the stopper member. Can be reliably brought into contact with each other.

  According to the invention of [8], the time from when the workpiece tip is detected by the sensor to when the workpiece tip contacts the stopper member can be shortened. Thereby, cutting time can be shortened. Furthermore, the control of the feed roller can be simplified.

  According to the invention of [9], it is possible to manufacture a bar-shaped workpiece cut product in which slip marks are not formed.

  According to the inventions [10] to [17], it is possible to provide a bar-shaped workpiece cutting device that is suitably used for the bar-shaped workpiece cutting method according to the inventions [1] to [8].

  According to the invention of [18], it is possible to provide an extrusion rear surface facility 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 schematic perspective view of the cutting apparatus shown in a state where the extruded material as a workpiece is being fed toward the stopper member. FIG. 3 is a schematic plan view of the cutting apparatus sequentially illustrating the basic steps of cutting the extruded material. FIG. 4A is a schematic plan view of the cutting device when the remaining length of the extruded material is long, and a feed time t of the extruded material by the feed roller in this case, for explaining a first control example of the cutting device. It is a graph which shows the relationship with the circumferential speed V of a feed roller. FIG. 4B is a schematic plan view of the cutting device when the remaining extruded material length is slightly shortened in the first control example, and the feed time t of the extruded material by the feed roller and the peripheral speed of the feed roller in this case It is a graph which shows the relationship with V. FIG. 4C is a schematic plan view of the cutting apparatus when the remaining length of the extruded material becomes very short in the first control example, and the feed time t of the extruded material by the feed roller and the circumference of the feed roller in this case. It is a graph which shows the relationship with the speed V. FIG. FIG. 5A is a schematic plan view of the cutting device when the remaining length of the extruded material is long, and a feed time t of the extruded material by the feed roller in this case, for explaining a second control example of the cutting device. It is a graph which shows the relationship with the circumferential speed V of a feed roller. FIG. 5B is a schematic plan view of the cutting device when the remaining length of the extruded material becomes very short in the second control example, and the feed time t of the extruded material by the feed roller and the circumference of the feed roller in this case It is a graph which shows the relationship with the speed V. FIG. FIG. 6A is a schematic plan view of the cutting device when the remaining length of the extruded material is long, and a feed time t of the extruded material by the feed roller in this case, for explaining a third control example of the cutting device. It is a graph which shows the relationship with the circumferential speed V of a feed roller. FIG. 6B is a schematic plan view of the cutting device when the remaining length of the extruded material becomes very short in the third control example, and the feed time t of the extruded material by the feed roller and the circumference of the feed roller in this case. It is a graph which shows the relationship with the speed V. FIG. FIG. 7A is a schematic plan view of the cutting device when the remaining length of the extruded material is long, and a feed time t of the extruded material by the feed roller in this case, for explaining a fourth control example of the cutting device. It is a graph which shows the relationship with the circumferential speed V of a feed roller. FIG. 7B is a schematic plan view of the cutting device when the remaining length of the extruded material becomes very short in the fourth control example, and the feed time t of the extruded material by the feed roller and the circumference of the feed roller in this case It is a graph which shows the relationship with the speed V. FIG. FIG. 8A is a schematic plan view of the cutting device when the remaining length of the extruded material is long, and a feed time t of the extruded material by the feed roller in this case, for explaining a fifth control example of the cutting device. It is a graph which shows the relationship with the circumferential speed V of a feed roller. FIG. 8B is a schematic plan view of the cutting device when the remaining length of the extruded material becomes very short in the fifth control example, and the feed time t of the extruded material by the feed roller and the circumference of the feed roller in this case It is a graph which shows the relationship with the speed V. FIG. FIG. 9 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. 10 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, an embodiment 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 runout table 4, a cooling table 5, a stretch table 6, a storage table 7, and a rod-like workpiece cutting device 10 according to the first embodiment of the present invention. doing. 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 triangular shape (see FIG. 2). The cross-sectional area of the extruded material 40 is constant in the length direction of the extruded material 40 (that is, the extrusion direction of the extruded material 40). 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, and the cross-sectional shape of the extruded material 40 is In addition, for example, a circular shape or a rectangular shape may be used.

  The cutting device 10 includes the saw charge table 11, the cutting means 14, the saw gauge table 12, the stopper member 21, the inspection table 17, the sensor 15, the feed roller control means 16, and the like.

  The cutting means 14 cuts the extruded material 40 from the tip end 40a to a predetermined length in order, 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. However, in the present invention, the cutting length L is not limited to being within the above range. G is the remaining length of the extruded material. When the extruded material 40 has not yet been cut by the cutting device 10, the remaining extruded material length G is the length of the extruded material 40 when placed on the saw charge table 11 from the storage table 7, that is, This is the initial length of the extruded material 40. This initial length is particularly “G0”. Therefore, when the extruded material 40 has not been cut by the cutting device 10 yet, the remaining length G of the extruded material is “G = G0”.

  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 feed roller 11a has a cylindrical shape and is configured to be able to be rotationally driven and stopped.

  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 feed roller 12a has a cylindrical shape and is configured to be able to be rotationally driven and stopped.

  The stopper member 21 regulates the forward movement of the extruded material 40 by the tip 40 a of the extruded material 40 coming into contact with the stopper member 21 and determines the extruded material cutting length L by the cutting means 14. The stopper member 21 is disposed on the downstream side of the cutting means 14 and, in detail, is disposed at a fixed position S that defines the extruded material cutting length L. 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.

  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. 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 members 40 arranged in parallel in the left-right direction are horizontally placed. In this embodiment, the number of extruded materials is two.

  On the inspection table 17 (see FIG. 1), the cut piece 41 is placed for performing various inspections such as an appearance inspection on the cut piece 41 of the extruded material 40. This cut piece 41 is used for the extrusion material used for a sash material, a vehicle material, a heat sink material, a conveyor frame material, etc. The cut piece 41 corresponds to a bar-shaped workpiece cut product.

  The stopper member 21 is arranged so as to be movable in parallel with the extruded material feed direction F of the feed roller 13. By moving the stopper member 21 in the upstream direction of the extruded material feeding direction F, the extruded material cutting length L is set to be short, while the stopper member 21 is moved in the downstream direction of the extruded material feeding direction F. Thus, the extrusion material cutting length L is set to be long. Furthermore, the stopper member 21 is disposed so as to be changeable 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.

  In the present embodiment, the stop position is a fixed position S located in front of the extruded material feed direction F (downstream direction). 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.

  The sensor 15 detects the front end 40a of the extruded material 40, and is disposed upstream of the stopper member 21 as shown in FIG. 2. More specifically, the sensor 15 is formed between the cutting means 14 and the stopper member 21. The feed roller 13 is disposed at a position not included in the detection area of the sensor 15.

  In the first embodiment, the sensor 15 is a transmissive sensor that is commercially available as a non-contact sensor, and more specifically, a transmissive photoelectric sensor. Accordingly, the sensor 15 includes a light projector (detection signal transmitter) 15a equipped with a light emitting element that emits (transmits) the detection light K as a detection signal, and a light receiving element that receives the detection light K emitted from the light projector 15a. And a mounted light receiver (detection signal receiver) 15b. The light projector 15a and the light receiver 15b are separately disposed on the left and right sides of the passage of the two extruded members 40 arranged in parallel in the left-right direction between the cutting means 14 and the stopper member 21. Further, the detection light K from the projector 15a is emitted (transmitted) in the left-right direction with respect to the extruded material feed direction F so as to cross the passage of the two extruded materials 40 in the left-right direction, and received by the light receiver 15b. Thus, the projector 15a and the light receiver 15b are arranged. Further, as shown in FIG. 1, the arrangement position of the projector 15a and the light receiver 15b, that is, the detection position P of the extruded material tip 40a by the sensor 15 is fixed. Therefore, the distance D between the extruded material cutting position C of the cutting means 14 and the detected position P of the extruded material front end 40a by the sensor 15 is set to be constant regardless of the arrangement position (that is, the fixed position S) of the stopper member 21. ing.

  When the stopper member 21 is arranged at the fixed position S, the distance E between the detection position P of the extruded material tip 40a by the sensor 15 and the arrangement position of the stopper member 21 (that is, the fixed position S) is “E = LD ".

  The feed roller control means 16 controls the operations of the feed roller 13, the stopper member 21 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. ing. A program for performing predetermined control is preinstalled in the computer.

  The control of the feed roller 13 by the feed roller control means 16 will be described. The control means 16 applies the stopper member 21 having the tip 40a of the extruded material 40 disposed at the fixed position S according to the remaining length G of the extruded material. The driving and stopping of the feed roller 13 are controlled so as to come into contact with each other. The detailed configuration of the control means 16 will be described later.

  FIG. 3 is a schematic plan view of the cutting apparatus 10 sequentially illustrating the basic steps of cutting the extruded material 40 using the cutting apparatus 10 of the first embodiment.

  3A is a schematic side view of the cutting apparatus 10 showing a state in which the extruded material 40 is being fed by the feed roller 13 in the direction F from the cutting means 14 toward the stopper member 21. FIG. FIG. 3B is a diagram illustrating a state where the tip 40 a of the extruded material 40 is detected by the sensor 15. FIG. 3C is a view showing a state where the tip 40 a of the extruded material 40 is in contact with 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.

  In FIG. 3A, the stopper member 21 is disposed at the fixed position S. Further, the detection light K is emitted from the light projector 15a of the sensor 15 toward the light receiver 15b. After this state, the two extruded materials 40 arranged in parallel in the left-right direction on the saw charge table 11 are moved in the length direction of the extruded material 40 in the direction F from the cutting means 14 toward the stopper member 21 by the feed roller 13. Send in bulk along. The feed speed of the extruded material 40 at this time is the same as the peripheral speed V of the feed roller, that is, V0. Further, the tip positions of the two extruded materials 40 are aligned or slightly shifted relative to the extruded material feed direction F.

  Then, as shown in FIG. 3 (b), the tip 40 a of the leading extrudate 40 out of the two extruded members 40 shields the detection light K of the sensor 15, so that the sensor 15 leads the tip of the leading extrudate 40. 40a is detected. This process is called “detection process”.

  Then, according to the remaining length G of the extruded material, the feed roller control means 16 controls the driving and stopping of the feed roller 13 so that the tip 40a of the extruded material 40 contacts the stopper member 21. This process is referred to as a “feed roller control process”.

  As shown in FIG. 3C, the feed roller stopping process stops the rotation drive of the feed roller 13 with the tip 40 a of the extruded material 40 in contact with the stopper member 21. At this time, the leading end positions of the two extruded materials 40 are aligned by abutting the extruded material leading ends 40 a against the stopper member 21.

  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.

  Such steps of FIGS. 3B to 3E are repeated. The extruded material remaining length G gradually decreases as the number of repetitions of the steps of FIGS. 3B to 3E, that is, the number N of times of cutting the extruded material 40 increases. 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).

  4A to 4C are a first control example of the feed roller 13 by the feed roller control means 16 of the cutting device 10, FIGS. 5A and 5B are a second control example, FIGS. 6A and 6B are a third control example, and FIGS. 7B is a diagram illustrating a fourth control example, and FIGS. 8A and 8B are diagrams illustrating a fifth control example.

  A basic configuration of the feed roller control means 16 will be described below with reference to FIGS.

  In these figures, H0, V0, t0, H1, V1, H2, t1, t2, t3 and R are as follows.

H0: At the time of detection of the extruded material tip 40a by the sensor 15 V0: The circumferential speed of the feed roller 13 at H0 t0: The maintenance time of the circumferential speed V0 of the feed roller 13 from H0 H1: The contact of the extruded material tip 40a against the stopper member 21 At the time of contact V1: The peripheral speed V1 of the feed roller 13 at H1
H2: When driving of the feed roller 13 is stopped t1: V1 maintaining time from the time when the circumferential speed of the feed roller 13 becomes V1 to H2 t2: Time from H1 to H2 t3: The circumferential speed of the feed roller 13 is V1 The maintenance time of V1 from the time of becoming to H1 R: Deceleration rate per unit time from V0 to V1.

  Usually, V0 is set within a range of, for example, 5 to 40 m / min, and V1 is a value larger than 0 and smaller than V0, that is, 0 <V1 <V0. V1 is set within a range of, for example, 1/4 to 1/2 times V0. For example, t0 is set within a range of 5 to 20 s, t1 is set within a range of 5 to 20 s, and t2 is set within a range of 1 to 5 s, for example. Note that t3 is calculated by “t3 = t1−t2”. However, in the present invention, V0, V1, t0, t1, and t2 are not limited to being within the above ranges, respectively, and the extruded material cutting length L, the extruded material initial length G0, the distance E, the feed Various changes are made according to the coefficient of friction between the roller 13 and the extruded material 40.

  As described above, the feed roller control means 16 controls driving and stopping of the feed roller 13 so that the tip 40a of the extruded material 40 abuts against the stopper member 21 according to the remaining length G of the extruded material. is there. This control means 16 is provided with the measurement part 16a and the calculating part 16b (refer FIG. 2).

  The measuring unit 16a measures the number of times N of cutting of the extruded material 40 by the cutting means 14.

  The calculation unit 16b includes an initial length G0 of the extruded material 40 that is stored and set in advance in the calculation unit 16b, an extruded material cutting length L that is set and stored in advance in the calculation unit 16b, and the number of cuttings that is measured by the measurement unit 16a. On the basis of N, the extruded material remaining length G is calculated. Specifically, in the calculation unit 16b, G is calculated by “G = G0− (N × L)”.

  Furthermore, the braking distance M of the extruded material 40 corresponding to the peripheral speed V of the feed roller 13 (that is, the feed speed of the extruded material 40) and the remaining extruded material length G is stored in the arithmetic unit 16b in advance. Furthermore, the distance E between the detection position P of the extruded material tip 40a by the sensor 15 and the arrangement position of the stopper member 21 (that is, the fixed position S) is stored and set in advance. The braking distance M of the extruded material 40 is measured and determined in advance by a preliminary test. Further, V1 when feeding the extruded material 40 having the initial length G0 is stored in advance in the calculation unit 16b of the feed roller control means 16 based on the braking distance M of the extruded material 40 having the initial length G0 measured by the preliminary test. Is set. The calculating unit 16b further calculates V0, V1, t0, t1, and R based on G, M, and E.

  In the first to fourth control examples, the circumferential speed V of the feed roller 13 is maintained at V0 for a predetermined time t0 from the detection time H0 of the extruded material tip 40a by the sensor 15, and then at a predetermined deceleration rate R. After being decelerated from V0 to V1, and thereafter maintained at V1 for a predetermined time t1, it is controlled by the feed roller control means 16 so that it becomes zero. Further, while the peripheral speed of the feed roller 13 is maintained at V0 (more specifically, when a predetermined time t3 has elapsed from when the peripheral speed of the feed roller 13 is reduced to V1), the tip of the extruded material 40 40 a contacts the stopper member 12.

  Next, each control example will be described in detail below.

<First control example>
In FIG. 4A, the number N of cuts of the extruded material 40 is, for example, the first time. In FIG. 4B, the cutting frequency N of the extruded material 40 is, for example, the fourth time. In FIG. 4C, the number of cuts N of the extruded material 40 is the eighth. As shown in these figures, the extruded material remaining length G becomes shorter as the number of cuts N of the extruded material 40 increases. Therefore, as N increases, the braking distance M of the extruded material 40 also decreases.

  As shown in FIGS. 4A to 4C, in the first control example, the feed roller control means 16 controls the drive of the feed roller 13 so that t1 gradually becomes longer as the extruded material remaining length G becomes shorter, and thereafter The drive of the feed roller 13 is suddenly stopped. V0, V1, t0, and R are constant regardless of the remaining extruded material length G. Further, t2 is substantially constant regardless of G. Further, the feed roller control means 16 is configured so that the V1 when the extruded material 40 of the initial length G0 is fed becomes the peripheral speed stored in advance in the calculation unit 16b of the feed roller control means 16. The drive is controlled.

  In this first control example, the feed roller control step is such that the tip 40a of the extruded material 40 comes into contact with the stopper member 21, and the peripheral speed V1 of the feed roller 13 at H1 is H0. In addition, the driving of the feed roller 13 is controlled so that t1 becomes gradually longer as the remaining length G of the extruded material becomes shorter, and then the driving of the feed roller 13 is suddenly stopped. In this feed roller control step, V1 when feeding the extruded material 40 of the initial length G0 is based on the braking distance M of the extruded material 40 of the initial length G0 measured by the preliminary test as described above. It is determined in advance.

  In the first control example, when the value of t1 when the extrusion material 40 is cut N times is t1 (N), and t1 when N + 1 is t1 (N + 1), t1 (N) and t1 ( The magnitude relationship of (N + 1) is represented by t1 (N) <t1 (N + 1).

  Thus, it is desirable that a relationship of t1 (N) <t1 (N + 1) is obtained for each cutting, however, when the amount of decrease in the extruded material remaining length G by a single cutting is small, it is not always necessary. It is not necessary to maintain the relationship of t1 (N) <t1 (N + 1) for each cutting, and t1 may be lengthened every other time or every other time. That is, for example, when every other t1 is increased, the magnitude relationship is expressed by the following relational expression (1).

  ... <t1 (N) = t1 (N + 1) <t1 (N + 2) = t1 (N + 3) <... Formula (1)

<Second control example>
In FIG. 5A, the number N of cuts of the extruded material 40 is, for example, the first time. In FIG. 5B, the number N of cuts of the extruded material 40 is, for example, the eighth.

  As shown in FIGS. 5A and 5B, in the second control example, the feed roller control means 16 controls the drive of the feed roller 13 so that t0 gradually increases as the extruded material remaining length G decreases. is there. V0, V1, t1, and R are constant regardless of the remaining extruded material length G. Further, t2 is substantially constant regardless of G.

  In this second control example, the feed roller control step is such that the tip 40a of the extruded material 40 abuts against the stopper member 21, and the circumferential speed V1 of the feed roller 13 at H1 is H0. In addition, the drive of the feed roller 13 is controlled so that t0 becomes gradually longer as the remaining length G of the extruded material becomes shorter, and then the drive of the feed roller 13 is suddenly stopped.

<Third control example>
In FIG. 6A, the number N of cuts of the extruded material 40 is, for example, the first time. In FIG. 6B, the number N of cuts of the extruded material 40 is, for example, the eighth.

  As shown in FIGS. 6A and 6B, in the third control example, the feed roller control means 16 controls the drive of the feed roller 13 so that V1 gradually increases as the extruded material remaining length G decreases. is there. V0, t0, t1, and R are constant regardless of the remaining extruded material length G. Further, t2 is substantially constant regardless of G.

  In this third control example, the feed roller control step is such that the tip 40a of the extruded material 40 comes into contact with the stopper member 21, and the circumferential speed V1 of the feed roller 13 at H1 is the circumferential speed V0 of the feed roller 13 at H0. Further, the drive of the feed roller 13 is controlled so that V1 gradually increases as the remaining length G of the extruded material becomes shorter, and then the drive of the feed roller 13 is suddenly stopped.

<Fourth control example>
In FIG. 7A, the number N of cuts of the extruded material 40 is, for example, the first time. In FIG. 7B, the number N of cuts of the extruded material 40 is, for example, the eighth.

  As shown in FIGS. 7A and 7B, in the fourth control example, the feed roller control means 16 controls the drive of the feed roller 13 so that R gradually decreases as the extruded material remaining length G decreases. is there. V0, V1, t0, and t1 are constant regardless of the remaining extruded material length G. Further, t2 is substantially constant regardless of G.

  In this fourth control example, the feed roller control step is such that the tip 40a of the extruded material 40 comes into contact with the stopper member 21, and the circumferential speed V1 of the feed roller 13 at H1 is H0. Further, the driving of the feed roller 13 is controlled so that R gradually becomes smaller as the remaining extruded material length G becomes shorter so that the remaining extruded material G becomes shorter, and then the driving of the feed roller 13 is suddenly stopped.

<Fifth control example>
In FIG. 8A, the number N of cuts of the extruded material 40 is, for example, the first time. In FIG. 8B, the number N of cuts of the extruded material 40 is, for example, the eighth.

  As shown in FIGS. 8A and 8B, in the fifth control example, the feed roller control means 16 suddenly stops the drive of the feed roller 13 before the tip 40 a of the push material 40 abuts against the stopper member 21. On the feed roller 13 so that the tip 40a of the extruded material 40 abuts against the stopper member 21 and t0 gradually increases as the extruded material remaining length G becomes shorter. 13 drives and stops driving. V0 is constant regardless of the extruded material remaining length G. V1, t0, t1, and t2 are zero.

  The feed roller control process of the fifth control example is such that the extrusion material 40 is caused to slide on the feed roller 13 by suddenly stopping the drive of the feed roller 13 before the tip 40a of the extrusion material 40 contacts the stopper member 21. As a result, the feed roller control means 16 drives the feed roller 13 so that the tip 40a of the extruded material 40 abuts against the stopper member 21 and t0 gradually increases as the extruded material remaining length G becomes shorter. And stop driving.

  Thus, the method for cutting the extruded material 40 of the present embodiment has the following advantages.

  In the feed roller control process, the remaining length of the extruded material is controlled by controlling the driving and stopping of the feed roller 13 so that the tip 40a of the extruded material 40 comes into contact with the stopper member 21 according to the remaining length G of the extruded material. Regardless of G, the slip rotation drive time of the feed roller 13 relative to the extruded material 40 after the tip 40a of the extruded material 40 contacts the stopper member 21 can be shortened as much as possible. Thereby, the malfunction that a slip trace is formed in the extrusion material 40 can be prevented.

  Further, in the feed roller control step, the circumferential speed V1 of the feed roller 13 at the time H1 when the extruded material tip 40a contacts the stopper member 21 is equal to the circumferential speed V0 of the feed roller 13 at the time H0 when the sensor 15 detects the extruded material tip 40a. By controlling the driving of the feed roller 13 so as to be slower than that, it is possible to reduce the impact when the extruded material tip 40a comes into contact with the stopper member 21.

  Furthermore, in the feed roller control step, V1 when feeding the extruded material 40 having the initial length G0 is determined in advance based on the braking distance M of the extruded material 40 having the initial length G0 measured by the preliminary test. When the extruded material 40 having the initial length G0 is cut, that is, when the extruded material 40 is cut first, a problem that slip marks are formed on the extruded material 40 can be prevented.

  Further, the sensor 15 is arranged at a position where the feed roller 13 between the cutting means 14 and the stopper member 21 is not included in the detection area of the sensor 15. It is possible to prevent a malfunction that is erroneously detected as the tip 40a.

  Furthermore, according to the first control example shown in FIGS. 4A to 4C, in the feed roller control step, the drive of the feed roller 13 is controlled so that t1 gradually increases as the remaining extruded material length G decreases. Thereby, even when the remaining length G of the extruded material is shortened, the tip 40a of the extruded material 40 can be reliably brought into contact with the stopper member 21.

  Further, according to the second control example shown in FIGS. 5A and 5B, in the feed roller control step, the drive of the feed roller 13 is controlled such that t0 gradually increases as the remaining extruded material length G decreases. Thus, the time from H0 when the sensor 15 detects the extruded material tip 40a to H1 when the extruded material tip 40a contacts the stopper member 21 can be shortened. Thereby, cutting time can be shortened.

  Furthermore, according to the third control example shown in FIGS. 6A and 6B, in the feed roller control step, the drive of the feed roller 13 is controlled so that V1 gradually increases as the remaining extruded material length G decreases. Thus, the time from H0 when the sensor 15 detects the extruded material tip 40a to H1 when the extruded material tip 40a contacts the stopper member 21 can be shortened. Thereby, cutting time can be shortened.

  Further, according to the fourth control example shown in FIGS. 7A and 7B, in the feed roller control process, the drive of the feed roller 13 is controlled so that R gradually decreases as the extruded material remaining length G decreases. Accordingly, even when the remaining length of the extruded material is shortened, the tip 40a of the extruded material 40 can be reliably brought into contact with the stopper member 21.

  Further, according to the fifth control example shown in FIGS. 8A and 8B, in the feed roller control step, the drive of the feed roller 13 is suddenly stopped before the tip 40a of the extruded material 40 comes into contact with the stopper member 21, thereby pushing out the extrusion roller 40. The material 40 is slid on the feed roller 13, so that the tip 40a of the extruded material 40 comes into contact with the stopper member 21, and so that t0 gradually increases as the extruded material remaining length G decreases. By controlling driving and stopping of the feed roller 13, the time from H0 when the sensor 15 detects the extruded material tip 40a to H1 when the extruded material tip 40a contacts the stopper member 21 can be shortened. Thereby, cutting time can be shortened. Furthermore, the control of the feed roller 13 can be simplified.

  Furthermore, since the sensor 15 is a transmissive sensor, it has the following advantages.

  If the sensor 15 is not a transmission type but a reflection type sensor, a reflected signal (eg, reflected light) from the tip 40a of the extruded material 40 cannot be received depending on the cross-sectional shape and width of the extruded material 40. Sometimes. Specifically, when the cross-sectional shape of the extruded material 40 is a triangle shape or a circular shape as in this embodiment, or the width dimension of the extruded material 40 is very small. The reflected signal from the extruded material tip 40a may not be received. In this case, since the sensor 15 cannot detect the tip 40 a of the extruded material 40, the rotational driving of the feed roller 13 is not stopped, and the feed roller 13 is kept in contact with the stopper member 21. The slip rotation drive is continued at the same position with respect to the extruded material 40. As a result, slip marks are formed on the extruded material 40.

  On the other hand, when the sensor 15 is a transmissive sensor, the tip 40a of the extruded material 40 can be reliably detected regardless of the cross-sectional shape and the width dimension of the extruded material 40. Thereby, the malfunction by which a slip trace is formed in the extrusion material 40 can be prevented reliably.

  Further, the transmission type sensor 15 detects the tip 40a of the extruded material 40 by transmitting the detection light K (detection signal) in the left-right direction with respect to the extruded material feed direction F of the feed roller 13. In the case where a plurality of extruded materials 40 are cut at a time, a problem that slip marks are formed on the extruded material 40 can be prevented by using one sensor 15. Thereby, the structure of the cutting device 10 used for the cutting method of the extrusion material 40 can be simplified.

  Furthermore, by cutting the extruded material 40 by the method for cutting the extruded material 40 of the present embodiment, it is possible to obtain an extruded material cut piece 41 in which slip marks are not formed, that is, the appearance is good.

  The embodiment of the present invention has been described above. However, 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. .

  In the present invention, the feed roller control step and the feed roller control means 16 control driving and stopping of the feed roller 13 by combining at least two of the controls shown in the first to fourth control examples. Also good.

  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.

  Moreover, in the said embodiment, although the feed roller 13 is cylindrical, in this invention, a feed roller may consist of a belt conveyor roller other than that.

  In the present invention, the workpiece may be the extruded material 40 as shown in the above embodiment, or may be another rod-shaped 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.

  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 16: Feed roller control means 21: Stopper member 40: Extruded material (bar-shaped workpiece)
41: Cut piece of extruded material (bar workpiece cut product)

Claims (12)

Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a method of cutting a rod-shaped workpiece using a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A feed roller control step for controlling the drive and drive stop of the feed roller so that the tip of the workpiece contacts the stopper member according to the remaining workpiece length ;
The sensor disposed upstream of the pre-Symbol stopper member includes a detection step for detecting the leading edge of the workpiece, and
In the feed roller control step,
The circumferential speed V1 (where V1> 0) of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. Control the drive of the feed roller, and then stop the drive of the feed roller ,
When the maintenance time of V1 from when the peripheral speed of the feed roller becomes V1 to when the drive of the feed roller is stopped is t1,
A rod-shaped workpiece cutting method, wherein the driving of the feed roller is controlled so that t1 becomes longer as the workpiece remaining length becomes shorter. Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a method of cutting a rod-shaped workpiece using a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A feed roller control step for controlling the drive and drive stop of the feed roller so that the tip of the workpiece contacts the stopper member according to the remaining workpiece length ;
The sensor disposed upstream of the pre-Symbol stopper member includes a detection step for detecting the leading edge of the workpiece, and
In the feed roller control step,
The circumferential speed V1 (where V1> 0) of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. Control the drive of the feed roller, and then stop the drive of the feed roller ,
When the maintenance time of the peripheral speed V0 of the feed roller from the detection of the workpiece tip by the sensor is t0,
A rod-shaped workpiece cutting method, wherein the driving of the feed roller is controlled so that t0 becomes longer as the workpiece remaining length becomes shorter. Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a method of cutting a rod-shaped workpiece using a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A feed roller control step for controlling the drive and drive stop of the feed roller so that the tip of the workpiece contacts the stopper member according to the remaining workpiece length ;
The sensor disposed upstream of the pre-Symbol stopper member includes a detection step for detecting the leading edge of the workpiece, and
In the feed roller control step,
The circumferential speed V1 (where V1> 0) of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. Control the drive of the feed roller, and then stop the drive of the feed roller ,
A rod-shaped workpiece cutting method, wherein the driving of the feed roller is controlled so that V1 increases as the workpiece remaining length decreases. Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a method of cutting a rod-shaped workpiece using a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A feed roller control step for controlling the drive and drive stop of the feed roller so that the tip of the workpiece contacts the stopper member according to the remaining workpiece length ;
The sensor disposed upstream of the pre-Symbol stopper member includes a detection step for detecting the leading edge of the workpiece, and
In the feed roller control step,
The circumferential speed V1 (where V1> 0) of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. Control the drive of the feed roller, and then stop the drive of the feed roller ,
When the deceleration rate per unit time from V0 to V1 is R,
A rod-shaped workpiece cutting method, wherein the driving of the feed roller is controlled such that R decreases as the workpiece remaining length decreases. Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a method of cutting a rod-shaped workpiece using a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A feed roller control step for controlling the drive and drive stop of the feed roller so that the tip of the workpiece contacts the stopper member according to the remaining workpiece length ;
The sensor disposed upstream of the pre-Symbol stopper member includes a detection step for detecting the leading edge of the workpiece, and
In the feed roller control step,
V0 is the peripheral speed of the feed roller when the workpiece tip is detected by the sensor.
When the maintenance time of the peripheral speed V0 of the feed roller from the detection of the workpiece tip by the sensor is t0,
The workpiece is slid on the feed roller by stopping the driving of the feed roller before the tip of the workpiece abuts against the stopper member, so that the tip of the workpiece abuts against the stopper member and the workpiece A rod-shaped workpiece cutting method, wherein driving and stopping of the feed roller are controlled so that t0 becomes longer as the remaining length becomes shorter. A method for producing a bar-shaped workpiece cut product, comprising: cutting a bar-shaped workpiece by the method for cutting a bar-shaped workpiece according to any one of claims 1 to 5 . Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A feed roller control means for controlling the driving and stopping of the feed roller so that the tip of the workpiece comes into contact with the stopper member according to the workpiece remaining length ;
While being disposed upstream of the pre-Symbol stopper member, and includes a sensor for detecting the leading edge of the workpiece, and
The feed roller control means includes
The circumferential speed V1 (where V1> 0) of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. Control the drive of the feed roller, and then stop the drive of the feed roller ,
When the maintenance time of V1 from when the peripheral speed of the feed roller becomes V1 to when the drive of the feed roller is stopped is t1,
As t1 according to work remaining length is shortened is lengthened, rod-like workpiece cutting apparatus, characterized in that for controlling the driving of the feed roller. Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A feed roller control means for controlling the driving and stopping of the feed roller so that the tip of the workpiece comes into contact with the stopper member according to the workpiece remaining length ;
While being disposed upstream of the pre-Symbol stopper member, and includes a sensor for detecting the leading edge of the workpiece, and
The feed roller control means includes
The circumferential speed V1 (where V1> 0) of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. Control the drive of the feed roller, and then stop the drive of the feed roller ,
When the maintenance time of the peripheral speed V0 of the feed roller from the detection of the workpiece tip by the sensor is t0,
As t0 according to work remaining length is shortened is lengthened, rod-like workpiece cutting apparatus, characterized in that for controlling the driving of the feed roller. Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A feed roller control means for controlling the driving and stopping of the feed roller so that the tip of the workpiece comes into contact with the stopper member according to the workpiece remaining length ;
While being disposed upstream of the pre-Symbol stopper member, and includes a sensor for detecting the leading edge of the workpiece, and
The feed roller control means includes
The circumferential speed V1 (where V1> 0) of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. Control the drive of the feed roller, and then stop the drive of the feed roller ,
As V1 according to work remaining length is shortened increases, rod-like workpiece cutting apparatus, characterized in that for controlling the driving of the feed roller. Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A feed roller control means for controlling the driving and stopping of the feed roller so that the tip of the workpiece comes into contact with the stopper member according to the workpiece remaining length ;
While being disposed upstream of the pre-Symbol stopper member, and includes a sensor for detecting the leading edge of the workpiece, and
The feed roller control means includes
The circumferential speed V1 (where V1> 0) of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential velocity V0 of the feed roller when the workpiece tip is detected by the sensor. Control the drive of the feed roller, and then stop the drive of the feed roller ,
When the deceleration rate per unit time from V0 to V1 is R,
As R decreases as the work remaining length is shortened, bar-like workpiece cutting apparatus, characterized in that for controlling the driving of the feed roller. Cutting means for sequentially cutting the rod-shaped workpiece from its tip to a predetermined length;
A stopper member that is disposed downstream of the workpiece cutting position of the cutting means and that stops the forward movement of the workpiece by contacting the tip of the workpiece and determines the workpiece cutting length by the cutting means;
A feed roller for feeding a workpiece in a direction from the cutting means toward the stopper member;
And having
The cutting means is a rod-shaped workpiece cutting device that cuts the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
A feed roller control means for controlling the driving and stopping of the feed roller so that the tip of the workpiece comes into contact with the stopper member according to the workpiece remaining length ;
While being disposed upstream of the pre-Symbol stopper member, and includes a sensor for detecting the leading edge of the workpiece, and
The feed roller control means includes
V0 is the peripheral speed of the feed roller when the workpiece tip is detected by the sensor.
When the maintenance time of the peripheral speed V0 of the feed roller from the detection of the workpiece tip by the sensor is t0,
The workpiece is slid on the feed roller by stopping the driving of the feed roller before the tip of the workpiece abuts against the stopper member, so that the tip of the workpiece abuts against the stopper member and the workpiece A rod-shaped workpiece cutting device characterized by controlling the drive of the feed roller and controlling the drive stop so that t0 becomes longer as the remaining length becomes shorter. An extrusion rear surface facility comprising the rod-shaped workpiece cutting device according to any one of claims 7 to 11 , wherein the extruded material extruded from the extruder is cut as a rod-shaped workpiece.

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