JP5468354B2 - 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)”. Between the cutting means 114 and the stopper member 121, a sensor 115 for detecting the tip 140a of the workpiece 140 is disposed. This sensor 115 is a reflection type photoelectric sensor (specifically, a diffuse reflection type photoelectric sensor) as a non-contact type sensor. K is a detection signal of the sensor 115.

  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 sensor 115 detects the tip 140a of the workpiece 140, the rotation of the feed roller 113 is uniformly rotated for a predetermined time (for example, about 5 seconds) from the detection, and then the rotation is stopped. It was. Here, the time from the detection of the workpiece tip 140a by the sensor 115 to the stop of the rotation of the feed roller 113 is referred to as the rotation drive duration of the feed roller 113.

  Conventionally, the rotation drive duration time of the feed roller 113 is set to be constant regardless of the length of the workpiece cutting length L. Therefore, when the workpiece cutting length L is changed to be short, each feed roller 113 is driven to slip and rotate at the same position with respect to the workpiece 140 for a long time from when the tip 140a of the workpiece 140 contacts the stopper member 121. End up. As a result, as shown in FIG. 10, slip traces 143 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. 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 cutting the rod-shaped workpiece into a predetermined length from the tip thereof;
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 for cutting the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
The workpiece cutting length is a method of cutting a rod-shaped workpiece using a rod-shaped workpiece cutting device that is changed by moving the stopper member in parallel with the workpiece feeding direction of the feed roller,
A detection step of detecting the tip of the rod-shaped workpiece by a sensor arranged at a position where the feed roller between the cutting means and the stopper member is not included in the detection area;
After the workpiece tip is detected by the sensor, the feed roller is rotationally driven by a workpiece feed amount set in accordance with the distance between the workpiece tip detection position by the sensor and the stopper member arrangement position. , A feed roller stop process for stopping the rotation drive,
A cutting step of cutting the workpiece by the cutting means after the feed roller stopping step;
A method for cutting a rod-shaped workpiece characterized by comprising:

  [2] The method for cutting a bar-shaped workpiece according to item 1, wherein the workpiece feed amount is longer than the distance.

  [3] The rod-shaped workpiece cutting method according to item 1 or 2, wherein the sensor is a transmissive sensor.

[4] The workpiece is a plurality of rod-shaped workpieces,
The feed roller is to collectively feed the plurality of works arranged in parallel in the left-right direction,
4. The bar-shaped workpiece cutting method according to item 3, wherein the transmission type sensor detects a tip of the workpiece by transmitting a detection signal in a lateral direction with respect to a workpiece feeding direction of the feeding roller.

[5] In the feed roller stop step,
The preceding item 1 in which the feed roller is controlled so that the peripheral speed of the feed roller when the work tip contacts the stopper member is lower than the peripheral speed of the feed roller when the work tip is detected by the sensor. The cutting method of the rod-shaped workpiece in any one of -4.

[6] In the feed roller stop 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,
6. The rod-shaped workpiece cutting method according to item 5 above, wherein the feed roller is controlled based on t0 set according to a distance between a detection position of the workpiece tip by the sensor and an arrangement position of the stopper member.

  [7] 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 1 to 6 above.

[8] Cutting means for cutting the rod-shaped workpiece into a predetermined length from the tip thereof;
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 for cutting the workpiece in a state where the tip of the workpiece is in contact with the stopper member,
The workpiece cutting length is a bar-shaped workpiece cutting device which is changed by moving the stopper member in parallel with the workpiece feeding direction of the feed roller,
A sensor that detects the tip of the bar-shaped workpiece, and is arranged at a position where the feed roller between the cutting means and the stopper member is not included in the detection area;
After the workpiece tip is detected by the sensor, the feed roller is rotationally driven by a workpiece feed amount set in accordance with the distance between the workpiece tip detection position by the sensor and the stopper member arrangement position. A feed roller control means for controlling the feed roller so as to stop the rotational drive;
A bar-shaped workpiece cutting device comprising:

  [9] The bar-shaped workpiece cutting device according to [8], wherein the workpiece feed amount of the feed roller control means is longer than the distance.

  [10] The rod-shaped workpiece cutting device according to item 8 or 9, wherein the sensor is a transmissive sensor.

[11] The workpiece is a plurality of rod-shaped workpieces,
The feed roller is to collectively feed the plurality of works arranged in parallel in the left-right direction,
The bar-shaped workpiece cutting device according to item 10 above, wherein the transmission type sensor detects a tip of the workpiece by transmitting a detection signal in a horizontal direction with respect to a workpiece feeding direction of the feeding roller.

[12] The feed roller control means further includes:
The feed roller is controlled so that the peripheral speed of the feed roller when the work tip contacts the stopper member is lower than the peripheral speed of the feed roller when the sensor detects the work tip. 12. A cutting apparatus for a rod-shaped workpiece according to any one of 8 to 11 above.

[13] The feed roller control means further 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,
13. The bar-shaped workpiece cutting device according to item 12, wherein the feed roller is controlled based on t0 set in accordance with a distance between a detection position of the workpiece tip by the sensor and an arrangement position of the stopper member.

  [14] A post extrusion equipment comprising the bar workpiece cutting device according to any one of 8 to 13 above, wherein the extrusion material extruded from the extruder is cut into a bar workpiece.

  The invention [1] has the following effects.

  In the feed roller stop process, the feed roller is driven to rotate by the workpiece feed amount that is set according to the distance between the position where the sensor detects the tip of the extruded material and the position of the stopper member. After the rotation, the rotation drive is stopped, so that the slip rotation drive time of the feed roller with respect to the workpiece can be set to be as short as possible according to the distance. 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.

  Of course, the sensor is disposed at a position where the feed roller between the cutting means and the stopper member is not included in the detection area, so that it is possible to prevent the sensor from erroneously detecting the feed roller as the tip of the workpiece. .

  According to the invention [2], since the workpiece feed amount is longer than the distance, the tip of the workpiece can be reliably brought into contact with the stopper member.

  The invention [3] has the following effects.

  If the sensor is not a transmissive sensor but a reflective sensor, a reflected signal (eg, reflected light) from the tip of the workpiece may not be received depending on the cross-sectional shape and width of the workpiece. Specifically, when the cross-sectional shape of the workpiece is a triangle shape or a circular shape, or the width dimension of the workpiece is very small, the reflected signal from the tip of the workpiece cannot be received. There is. In this case, since the sensor cannot detect the tip of the workpiece, the rotation driving of the feed roller is not stopped, and the feed roller is driven to slip and rotate at the same position with respect to the workpiece while the tip of the workpiece is in contact with the stopper member. Keep doing. As a result, slip marks are formed on the workpiece.

  On the other hand, when the sensor is a transmissive sensor, the tip of the workpiece can be reliably detected regardless of the cross-sectional shape or width of the workpiece. Thereby, the malfunction by which a slip trace is formed in a workpiece | work can be prevented reliably.

  According to the invention of [4], the transmission type sensor detects the tip of the workpiece by transmitting a detection signal in the left-right direction with respect to the workpiece feeding direction of the feeding roller. In the case of cutting in a lump, a problem that slip marks are formed on the workpiece can be prevented by using one sensor. Thereby, the structure of the cutting device used for the cutting method of a workpiece | work can be simplified.

  According to the invention of [5], the feed roller is set so that the circumferential speed of the feed roller when the workpiece tip contacts the stopper member is lower than the circumferential speed of the feed roller when the workpiece tip is detected by the sensor. By controlling, the impact at the time of contact of the workpiece tip with the stopper member can be reduced.

  According to the invention of [6], the workpiece by the sensor is controlled by controlling the feed roller based on t0 set in accordance with the distance between the detection position of the front end of the extruded material by the sensor and the arrangement position of the stopper member. The time from when the tip is detected to when the workpiece tip comes into contact with the stopper member can be shortened as much as possible. Thereby, cutting time can be shortened.

  According to the invention of [7], it is possible to manufacture a bar-shaped workpiece cut product in which slip marks are not formed.

  According to the inventions [8] to [13], it is possible to provide a bar-shaped workpiece cutting device that is preferably used in the cutting direction of the bar-shaped workpiece according to the inventions [1] to [6].

  According to the invention of [14], 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 a reference 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 device when the extruded material cutting length (work cutting length) is short, and a graph showing the relationship between the feed time t of the extruded material by the feed roller and the peripheral speed V of the feed roller. It is. FIG. 4 is a schematic plan view of the cutting device when the workpiece cutting length (work cutting length) is long, and a graph showing the relationship between the feed time t of the extruded material by the feed roller and the peripheral speed V of the feed roller. is there. FIG. 5: is a schematic plan view of the same cutting device which shows the process of cut | disconnecting an extrusion material in order. FIG. 6 is a flowchart of the operation of the cutting apparatus. FIG. 7: is a schematic perspective view of the cutting device shown in the middle of feeding the extruded material toward the stopper member using the extruded material cutting device as the rod-shaped workpiece cutting device according to one embodiment of the present invention. It is. FIG. 8 is a schematic side view of the cutting apparatus. 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, reference embodiments and 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 the reference form 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 a reference embodiment of the present invention. Yes. 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). 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. 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 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. However, in the present invention, the cutting length L 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 feed roller 11a has a cylindrical shape and is configured to be able to rotate and stop.

  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 is configured to be capable of rotating and stopping.

  The stopper member 21 regulates the forward movement of the extruded material 40 when the tip 40 a of the extruded material 40 abuts against the stopper member 21, and determines the extruded material cutting length L by the cutting means 14. Is also arranged on the downstream side. More specifically, it is arranged at a fixed position S that defines an 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 reference 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 this preferred embodiment, the stop position is a position S which is located forward (downstream direction) 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.

  The sensor 15 detects the tip 40a of the extruded material 40, and as shown in FIG. 2, 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. Is arranged.

In this reference embodiment, the sensor 15 is a transmissive photoelectric sensor commercially available as a non-contact 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.

  A detailed configuration of the control means 16 will be described below with reference to FIGS. 3 and 4 focusing on the control of the feed roller 13 by the feed roller control means 16.

  FIG. 3A is a schematic plan view of the cutting device 10 in the case where the extruded material cutting length L by the cutting means 14 is short. FIG. 3B is a graph showing the relationship between the feed time t of the extruded material 40 by the feed roller 13 and the peripheral speed V of the feed roller 13 in the case shown in FIG.

  FIG. 4A is a schematic plan view of the cutting device 10 in the case where the extruded material cutting length L by the cutting means 14 is long. FIG. 4B is a graph showing the relationship between the feed time t of the extruded material 40 by the feed roller 13 and the peripheral speed V of the feed roller 13 in the case shown in FIG.

  3 (a) and 4 (a), the front end 40a of the extruded material 40 collides (that is, abuts) with the stopper member 21, whereby the forward movement of the extruded material 40 is restricted. Further, the cut piece 41 of the extruded material 40 is transferred from the saw gauge table 12 onto the inspection table 17.

  Here, in FIGS. 3B and 4B, 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.

  This control means 16 changes the distance E between the detection position P of the extruded material tip 40a detected by the sensor 15 and the arrangement position of the stopper member 21 (that is, the fixed position S) from H0 when the sensor 15 detects the extruded material tip 40a. The feed roller 13 is controlled so as to stop the rotational drive after the feed roller 13 is rotationally driven by a set amount of the extruded material feed. Specifically, the control means 16 makes the relationship between the feed time t of the extruded material 40 by the feed roller 13 and the peripheral speed V of the feed roller 13 become a graph shown in FIG. The feed roller 13 is controlled. The extrusion material feed amount set according to the distance E is an amount equal to or longer than the distance E, and preferably an amount longer than the distance E. Therefore, t2 is preferably larger than 0 (that is, t2> 0). Here, in the present invention, the excess length of the extruded material feed amount with respect to the distance E is not limited, but it is particularly desirable to be within a range of 0.01 to 0.3 m. A specific example of the extruded material feed amount will be described later.

  As shown in the figure, V1 is slower than V0 and larger than 0 (that is, 0 <V1 <V0). Accordingly, the circumferential speed V of the feed roller 13 is maintained at V0 for a predetermined time t0 from H0 when the extruded material tip 40a is detected by the sensor 15, and then decelerated from V0 to V1 at a predetermined deceleration rate R. Thereafter, the voltage is maintained at V1 for a predetermined time t1, and then controlled by the control means 16 so as to become zero. Further, while the circumferential speed V of the feed roller 13 is maintained at V1 (more specifically, when the predetermined time t3 has elapsed since the circumferential speed V of the feed roller 13 was decelerated from V0 to V1), the extrusion The tip 40a of the material 40 collides (that is, abuts) against the stopper member 12. Thereby, the forward movement of the extruded material 40 is restricted.

  Furthermore, the control means 16 controls the feed roller 13 based on t0 set according to the distance E. That is, as shown in FIGS. 3A and 3B, when the distance E is short, t0 is set short. On the other hand, as shown in FIGS. 4A and 4B, when the distance E is long, t0 is set to be long in order to shorten the conveying time of the extruded material 40 as much as possible. Regardless of the distance E, t1, t2 and t3 are constant.

  Usually, V0 is set within a range of, for example, 5 to 40 m / min, V1 is set within a range of 1/4 to 1/2 times of V0, and t0 is set within a range of, for example, 5 to 20 s. T1 is set within a range of 5 to 20 s, for example, 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, t2, and t3 are not limited to being within the above ranges, but variously depending on the extruded material cutting length L, distance E, and the like. It will be changed.

Next, a method for cutting of the extruded material 40 using a cutting apparatus 10 of the present reference embodiment will be described below with reference to FIG.

  In FIG. 5, FIG. 5A 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 F from the cutting means 14 toward the stopper member 21. FIG. 5B is a diagram illustrating a state in which the tip 40 a of the extruded material 40 is detected by the sensor 15. FIG. 5C is a diagram illustrating a state where the tip 40 a of the extruded material 40 is in contact with the stopper member 21. FIG. 5D is a view showing a state in which the extruded material 40 is cut by the cutting means 14. FIG. 5E 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. 5A, 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. The V0 is constant. 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. 5B, 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, after the sensor 15 detects the leading end 40a of the leading extruding material 40 in this way, the feed roller 13 is rotated by the amount of the extruding material feeding amount set according to the distance E, and then the rotational driving is performed. Stop. This process is called “feed roller stop process”.

  Specific examples of the extrusion material feed amount are shown below.

  For example, when L = 3 m, D = 1 m, and E = 2 m, the extrusion material feed amount is set to 2 m + α, and when L = 4 m, D = 1 m, and E = 3 m, the extrusion material feed amount. Is set to 3 m + α, and when L = 6 m, D = 1, and E = 5 m, the extrusion material feed amount is set to 5 m + α. α is a deviation in the extrusion material feed direction F between the position of the leading extrusion material tip 40a and the position of the trailing extrusion material tip 40a at the time H1 when the leading extrusion material tip 40a contacts the stopper member 21. It is desirable to set based on the quantity. The amount of deviation is determined in advance by a preliminary test. When this shift amount is Z, α is set to an amount equal to or slightly longer than the shift amount Z, and preferably α is set within a range of Z to Z + 0.3 m. good. By setting α in this way, the tip 40a of each extruded material 40 can be reliably brought into contact with the stopper member 21, and slip marks are formed on the extruded material 40 (particularly, the first extruded material 40). It is possible to reliably prevent problems.

  As shown in FIG. 5C, the feed roller stopping process stops the rotation of the feed roller 13 while the tip 40a of the extruded material 40 is in contact with the stopper member 21. At this time, the tip positions of the two extruded materials 40 are aligned by the contact of the extruded material tips 40a with the stopper member 21.

  Next, as shown in FIG. 5 (d), these extruded materials 40 are collectively cut by the cutting means 14. This process is called a “cutting process”.

  Next, as illustrated in FIG. 5E, 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. 5A to 5E 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).

Next, operation | movement of the cutting device 10 of this reference form is demonstrated below based on the flowchart shown in FIG.

  In step S 1, the extruded material cutting length L is set in the feed roller control means 16. The distance D is preset in the feed roller control means 16. Then, the control means 16 calculates the distance E based on the cutting length L and the distance D (that is, E is calculated by subtracting D from L), and this distance E is set in the control means 16. The

  In step S2, the stopper member 21 is disposed at the fixed position S.

  In step S3, the extruded material 40 is fed by the feed roller 13 (see FIG. 5A).

  In step S4, the tip 15a of the extruded material 40 is detected by the sensor 15 (see FIG. 5B). The time at this time is H0.

  In step S5, t0 is determined based on the distance E.

  In step S6, the extruded material 40 is fed by the feed roller 13 at a peripheral speed V0 from H0 for a predetermined time t0. Thereafter, the peripheral speed V of the feed roller 13 is reduced from V0 to V1 at a predetermined reduction rate R.

  In step S7, after the extruded material 40 is fed by the feed roller 13 at the peripheral speed V1 for a predetermined time t1, the rotation driving of the feed roller 13 is stopped (see FIG. 5C). In step S <b> 8, the tip 40 a of the extruded material 40 comes into contact with the stopper member 21 while the extruded material 40 is being fed at the peripheral speed V <b> 1 of the feed roller 13 in this way. Thereby, the front-end | tip 40a of the extrusion material 40 is arrange | positioned in the fixed position S. FIG.

  In step S9, the extruded material 40 is cut by the cutting means 14 (see FIG. 5D).

  In step S10, the stopper member 21 is disposed at the non-stop position, and the cut piece 41 of the extruded material 40 is sent to the downstream side of the saw gauge table 12 by the feed roller 12a (see FIG. 5E).

  The above steps S1 to S10 are repeated.

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

  In the feed roller stop step, the extrusion set according to the distance E between the detection position P of the extruded material front end 40a by the sensor 15 and the arrangement position of the stopper member 21 from H0 when the extruded material front end 40a is detected by the sensor 15. After the feed roller 13 is rotationally driven by the material feed amount, the rotational drive is stopped, so the slip rotation drive time of the feed roller 13 with respect to the extruded material 40 is set to be as short as possible according to the distance E. be able to. Thereby, the malfunction by which a slip trace is formed in the extrusion material 40 can be prevented, and also the wear deformation of the feed roller 13 can be prevented.

  Of course, the sensor 15 is disposed 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, when the amount of extruded material feed is longer than the distance E, the tip 40a of the extruded material 40 can be reliably brought into contact with the stopper member 21.

  Further, since the sensor 15 is a transmissive sensor, the following advantages are obtained.

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 triangular shape or a circular shape as in this reference embodiment, or the width 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.

  Further, the circumferential speed V1 of the feed roller 13 at H1 when the extruded material tip 40a contacts the stopper member 21 is lower than the circumferential speed V0 of the feed roller 13 at H0 when the sensor 15 detects the extruded material tip 40a. In addition, by controlling the feed roller 13 by the feed roller control means 16, it is possible to mitigate the impact when the extruded material tip 40 a comes into contact with the stopper member 21.

  Further, by controlling the feed roller 13 by the feed roller control means 16 based on t0 set according to the distance E, the stopper member 21 of the extruded material tip 40a from H0 when the sensor 15 detects the extruded material tip 40a. The time up to H1 at the time of contact with can be reduced as much as possible. Thereby, cutting time can be shortened.

7 and 8 are diagrams illustrating a method for cutting the extruded material 40 using the extruded material cutting apparatus 10 according to an embodiment of the present invention.

The cutting device 10, the number and arrangement position of the sensor 15 except that different from the cutting device 10 of the reference embodiment has the same configuration as the cutting apparatus 10 of the Reference Embodiment. The configuration of the cutting device 10 will be described below with a focus on differences from the cutting device 10 of the reference embodiment.

  The cutting device 10 includes a plurality of sensors 15 arranged corresponding to the plurality of extruded materials 40, respectively. That is, the number of sensors 15 is the same as the number of extruded materials 40, that is, two. Each sensor 15 is a transmissive photoelectric sensor, and detects the tip 40a of the corresponding extruded material 40. Further, each sensor 15 is arranged at a position where the feed roller 13 between the cutting means (not shown) and the stopper member 21 is not included in the detection area of the sensor 15. More specifically, the light projector 15a and the light receiver 15b of each sensor 15 are separately arranged on the upper and lower sides of the passage of the corresponding extruded material 40 between the cutting means and the stopper member 21. The light projector 15 a is disposed above the passage of the extruded material 40, and the light receiver 15 b is disposed below the passage of the extruded material 40. Then, the light projector 15a and the light receiver 15b are received so that the detection light K is emitted (transmitted) downward from the light projector 15a and passes between the two adjacent feed rollers 13 and 13 and then received by the light receiver 15b. 15b is arranged.

The other configuration of the cutting device 10 is the same as that of the cutting device 10 of the reference embodiment.

In the cutting method of the extruded material 40 using the cutting device 10, the feed roller 13 starts from the time of detection of the extruded material front end 40 a by the sensor 15 that detects the latest end 40 a of the extruded material 40 out of the two sensors 15, 15. Then, after being driven to rotate by the amount of extruded material feed set according to the distance E, the feed roller control means 16 controls so that the rotational drive is stopped. The other cutting method is the same as the cutting method of the extruded material 40 of the reference embodiment.

In the present implementation embodiment, the cutting device 10, because it contains two sensors 15 and 15 for detecting the respective tips 40a of the two extrusions 40, is possible to reliably detect the leading end 40a of the extruded material 40 it can. Furthermore, since the extrusion material feed amount set according to the distance E is the feed amount from the time of detection of the extrusion material tip 40a by the sensor 15 that has detected the tip 40a of the extrusion material 40 the latest among the two sensors, The distal end 40a of each extruded material 40 can be reliably brought into contact with the stopper member 21.

  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 having no slip marks, that is, having a good appearance.

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.

  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 (10)

Cutting means for cutting a plurality of rod-shaped workpieces arranged in parallel in the left-right direction from the tip to a predetermined length;
Disposed downstream of the workpiece cutting position of the cutting means, and a stopper member defining a work cut length by said cutting means to stop the forward movement of a plurality of workpieces by the tip of the plurality of workpiece contact ,
A feed roller that collectively feeds a plurality of workpieces in a direction from the cutting means toward the stopper member;
And having
It said cutting means, which tips of the plurality of workpieces are cut collectively plurality of workpieces in a state of contact with the stopper member,
The workpiece cutting length is a method of cutting a rod-shaped workpiece using a rod-shaped workpiece cutting device that is changed by moving the stopper member in parallel with the workpiece feeding direction of the feed roller,
A plurality of sensors which the feed roller is arranged corresponding to the plurality of bar-like workpiece at a position not included in the detection area between the said stopper member and the cutting means, for detecting the leading edge of a plurality of word over click A detection process;
The workpiece set according to the distance between the detection position of the workpiece tip by the sensor and the arrangement position of the stopper member from the time of detection of the workpiece tip by the sensor that has detected the tip of the workpiece the latest among the plurality of sensors. A feed roller stop step for rotating the feed roller by a feed amount and then stopping the rotation drive;
A cutting step in which a plurality of workpieces are collectively cut by the cutting means after the feed roller stop step;
A method for cutting a rod-shaped workpiece characterized by comprising:   The rod workpiece cutting method according to claim 1, wherein the workpiece feed amount is longer than the distance. The rod-shaped workpiece cutting method according to claim 1, wherein each of the sensors is a transmissive sensor. The rod-shaped workpiece cutting method according to claim 3, wherein each of the sensors detects a tip of a corresponding workpiece by transmitting a detection signal in a vertical direction with respect to a workpiece feeding direction of the feeding roller. Method for producing a rod-shaped workpiece cut piece, characterized in that cutting collectively a plurality of rod-shaped workpieces by cutting method of the rod-shaped workpiece according to any one of claims 1-4. Cutting means for cutting a plurality of rod-shaped workpieces arranged in parallel in the left-right direction from the tip to a predetermined length;
Disposed downstream of the workpiece cutting position of the cutting means, and a stopper member defining a work cut length by said cutting means to stop the forward movement of a plurality of workpieces by the tip of the plurality of workpiece contact ,
A feed roller that collectively feeds a plurality of workpieces in a direction from the cutting means toward the stopper member;
And having
It said cutting means, which tips of the plurality of workpieces are cut collectively plurality of workpieces in a state of contact with the stopper member,
The workpiece cutting length is a bar-shaped workpiece cutting device which is changed by moving the stopper member in parallel with the workpiece feeding direction of the feed roller,
Together are arranged corresponding to the plurality of bar-like workpiece to the position where the feed roller is not included in the detection area between the said stopper member and said cutting means, a plurality of sensors for detecting the leading edge of the corresponding work,
The workpiece set according to the distance between the detection position of the workpiece tip by the sensor and the arrangement position of the stopper member from the time of detection of the workpiece tip by the sensor that has detected the tip of the workpiece the latest among the plurality of sensors. A feed roller control means for controlling the feed roller so as to stop the rotational drive after rotating the feed roller by a feed amount;
A bar-shaped workpiece cutting device comprising: The bar workpiece cutting device according to claim 6 , wherein the workpiece feed amount of the feed roller control means is longer than the distance. The rod-shaped workpiece cutting device according to claim 6 or 7 , wherein each of the sensors is a transmission type sensor. 9. The bar-shaped workpiece cutting device according to claim 8 , wherein each of the sensors detects a tip of a corresponding workpiece by transmitting a detection signal in a vertical direction with respect to a workpiece feeding direction of the feeding roller. An extrusion rear surface facility comprising the rod-shaped workpiece cutting device according to any one of claims 6 to 9 , wherein the extruded material extruded from the extruder is cut as a rod-shaped workpiece.

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