JP4988439B2 - Extruded material cutting method - Google Patents

Description

  The present invention relates to a method for cutting an extruded material extruded by an extrusion press, a cutting device for the extruded material, and an extrusion facility.

  An extrusion facility for producing an extruded material generally includes an extrusion press, a cutting device for cutting the extruded material extruded by the extrusion press, and the like.

  In this extrusion equipment, the extrusion press includes a container in which a billet is loaded, an extrusion die having an extrusion hole, and the like. As the cutting device, a traveling cutting device is generally used that cuts the extruded material to a product length while moving in synchronization with the extrusion speed of the extruded material extruded by the extrusion press (for example, Patent Documents 1 and 2).

  Extrusion using this extrusion equipment is performed as follows. First, an extrusion process is performed on the preceding billet charged in the container of the extrusion press. When the remaining amount of the preceding billet in the container reaches a predetermined amount, the extrusion process is stopped and the pushed residue is removed by shearing. Next, the subsequent billet is charged into the container, the subsequent billet and the preceding billet in the container are pushed over, and the extrusion process is resumed.

  In such an extrusion process, the extruded material extruded by the extrusion press is cut to a product length by a traveling cutting device, whereby a large number of fixed products are obtained from the extruded material.

Thus, when extruding by pushing both billets together, the portion from the pushing portion between both billets in the extruded material to a predetermined length region on the rear side (example: several m) is poorly bonded. There is a high possibility that quality deterioration or the like has occurred due to the inclusion of impurities, and therefore it cannot be used as a product. Further, when the extrusion process is stopped due to the push-in, a stop mark portion is generated at the exit position of the extrusion hole of the extrusion press in the extruded material. This stop mark portion cannot be used as a product because of its poor structure and appearance. Therefore, a portion from the position of the stop mark portion in the extruded material to a predetermined length region on the rear side of the push-in portion is called a push-in influence portion, and this push-in influence portion is required as a product. It is desirable to remove the defective portion that does not satisfy the quality when the product is obtained from the extruded material.
Japanese Patent Laid-Open No. 53-130264 Japanese Patent Laid-Open No. 10-277635 (paragraph [0016], FIG. 7-9)

  The conventional method for removing the push-in influence portion will be described as follows.

  That is, a mark such as a flaw indicating the seizure affected portion is marked by the marking device on the push impacted portion of the extruded material, and in this state, the extruded material is cut into a product length by a traveling cutting device. Then, from the large number of fixed-size cut pieces obtained in this way, a cut piece with even a small mark is searched for and removed. Therefore, there are many cases in which only a part of the cut pieces to be removed is formed by the splicing influence part and the remaining part is formed by a part that can be used as a product, and the yield of the product is poor. There was a difficulty.

The present invention has been made in view of the aforementioned technical background, and its object is a method for cutting an extruded material that can improve the yield of the obtained Ru products from extruded material, suitable for use in the cutting method An object of the present invention is to provide an extrusion material cutting device and an extrusion facility equipped with the cutting device.

  The present invention provides the following means.

[1] A traveling cutting means for cutting the extruded material extruded by the extrusion press while moving in synchronization with the extrusion speed of the extruded material;
A moving amount measuring means for measuring the moving amount of the extruded material;
Including an extruded material cutting device,
Based on the measured movement amount of the extruded material measured by the movement amount measuring means, the extruded material is cut into a product length by the traveling cutting means,
When a defective part is formed in the extruded material, the extruded material is cut by the traveling cutting means at the rear end position of the defective part.

  [2] The method for cutting an extruded material as recited in the aforementioned Item 1, wherein the product length is a fixed length.

  [3] In the case where the defective portion is formed by pushing the preceding billet and the succeeding billet, the pushing influence portion having a predetermined length is set as the defective portion, and an extruded material is used as the pushing material. 3. The method for cutting an extruded material according to 1 or 2 above, wherein the traveling cutting means cuts at the rear end position of the affected part.

[4] The cutting device includes:
A distance setting unit that presets the distance from the exit position of the extrusion hole of the extrusion press to the cutting position of the traveling cutting means;
When the extrusion process by the extrusion press is stopped for the joint between the billets, and then the extrusion process is resumed, the extrusion material is affected by the distance and the joint effect when the extrusion process is resumed. The extruded material according to item 3, wherein the extruded material is cut by the traveling cutting means when the total amount with the length of the portion is moved, and thereby the cutting is performed at the rear end position of the push-affected portion by the traveling cutting means. Cutting method.

  [5] The cutting of the extruded material according to 3 or 4 above, wherein the extruded material is cut into the product length by the traveling cutting means until at least the front end of the push-affected influence portion of the extruded material reaches the cutting position of the traveling cutting means. Method.

[6] The cutting device includes:
When the extrusion process by the extrusion press is being stopped for the purpose of pushing the two billets together, the extrusion projecting forward from the exit position of the extrusion hole of the extrusion press when the extrusion process is stopped Based on the length of the protruding part of the material, it has a calculating part that calculates the maximum number of products that can be obtained from the protruding part of the extruded material,
The extruded material is cut into the product length by the traveling cutting means until the extrusion process by the extrusion press is stopped for the joint between the billets,
5. The method for cutting an extruded material according to 3 or 4 above, wherein when the extrusion process is resumed, at least the maximum number of the extruded material is cut into a product length by the traveling cutting means after the extrusion process is resumed.

  [7] When the defective portion is formed by an abnormality occurring in the extrusion process condition, the defective part is extruded after the abnormality occurs in the extrusion process condition until the extrusion process condition is normally recovered. 3. The extruded material cutting method according to claim 1 or 2, wherein the cut portion is defined as the defective portion, and the extruded material is cut by the traveling cutting means at a rear end position of the defective portion.

  [8] The extruded material cutting method according to item 7, wherein the extruded material is cut into a product length by the traveling cutting means until at least a front end of the defective portion of the extruded material reaches a cutting position of the traveling cutting means.

[9] A traveling cutting means for cutting the extruded material extruded by the extrusion press while moving in synchronization with the extrusion speed of the extruded material;
A moving amount measuring means for measuring the moving amount of the extruded material;
Control means for controlling the travel cutting means;
Contains
The control means includes
Based on the measured movement amount of the extruded material measured by the movement amount measuring means, the travel cutting means is controlled to cut the extruded material into a product length, and
An apparatus for cutting extruded material, characterized in that, when a defective portion is detected in the extruded material, the traveling cutting means is controlled so as to cut the extruded material at a rear end position of the defective portion.

  [10] The cutting apparatus for extruded material as described in 9 above, wherein the product length is constant.

[11] The control means includes:
In the case where the defective portion is formed by the pushing of the preceding billet and the succeeding billet, the pushing influence portion having a preset length is set as the defective portion, and an extruded material is used as the pushing influence portion. 11. The extruded material cutting device according to 9 or 10 above, wherein the traveling cutting means is controlled to cut at a rear end position.

[12] The control means includes:
A distance setting unit that presets the distance from the exit position of the extrusion hole of the extrusion press to the cutting position of the traveling cutting means;
When the extrusion process by the extrusion press is stopped for the joint between the billets, and then the extrusion process is resumed, the extrusion material is affected by the distance and the joint effect when the extrusion process is resumed. When the total amount with the length of the portion is moved, the traveling cutting means is controlled so as to cut the extruded material, and thereby the extruded material is cut at the rear end position of the push-affected portion. 11. Extruder cutting apparatus according to 11.

[13] The control means includes:
13. The extruded material according to the preceding item 11 or 12, wherein the traveling cutting means is controlled so that the extruded material is cut into a product length until at least a front end of the push affected portion of the extruded material reaches a cutting position of the traveling cutting means. Cutting device.

[14] The control means includes:
When the extrusion process by the extrusion press is being stopped for the purpose of pushing the two billets together, the extrusion projecting forward from the exit position of the extrusion hole of the extrusion press when the extrusion process is stopped Based on the length of the protruding portion of the material, with a calculation unit that calculates the maximum number of products that can be obtained from the protruding portion of the extruded material,
Controlling the traveling cutting means so as to cut the extruded material into a product length until the extrusion process by the extrusion press is stopped for the joint between the billets;
13. When the extrusion process is resumed, the cutting of the extruded material according to 11 or 12 above, wherein the traveling cutting means is controlled so as to cut at least the maximum number of the extruded material into a product length from the time when the extrusion process is resumed. apparatus.

[15] The control means includes:
In the case where the defective part is formed due to an abnormality in the extrusion process condition, a portion extruded from when the abnormality occurs in the extrusion process until the extrusion process is normally recovered 11. The extruded material cutting device according to claim 9 or 10, wherein the traveling cutting means is controlled so as to cut the extruded material at a rear end position of the defective portion.

[16] The control means includes:
16. The extruded material cutting device according to item 15, wherein the traveling cutting means is controlled so that the extruded material is cut into a product length until at least a front end of the defective portion of the extruded material reaches a cutting position of the traveling cutting means.

  [17] An extrusion facility comprising the extruded material cutting device according to any one of 9 to 16 above.

  The present invention has the following effects.

  In this specification, for convenience of explanation, a portion of the extruded material that cannot be used as a product due to reasons such as not satisfying the quality required for the product is called a “defective portion”, and a portion that can be used as a product (that is, a defective portion) The part other than the part) is called “excellent part” to distinguish it from the defective part.

  In the invention of [1], since the extruded material is cut into the product length by the traveling cutting means based on the measured movement amount of the extruded material measured by the moving amount measuring means of the cutting device, the product is reliably removed from the extruded material. Can be acquired. Furthermore, when a defective part is formed in the extruded material, the extruded material is cut at the rear end position of the defective part, so that product removal from the extruded material can be performed from the rear end position of the defective part of the extruded material. That is, when acquiring a product from the extruded material, the front end position of the product to be acquired can be set to the front end position of the excellent portion formed on the rear side of the defective portion of the extruded material. Thereby, the yield of a product can be improved.

  In the invention of [2], it is possible to reliably obtain a standard product from the extruded material.

  In the invention of [3], the effect of the invention of [1] or [2] is exhibited when the defective portion of the extruded material is the pushing influence portion.

  In the invention of [4], the extruded material can be surely cut at the rear end position of the push-in influence portion.

  In the invention of [5], the product can be more reliably obtained from the extruded material.

  In the invention of [6], the product can be more reliably obtained from the extruded material.

  In the invention of [7], the effect of the invention of [1] or [2] is exhibited when the defective portion of the extruded material is formed due to an abnormality in the extrusion process conditions.

  In the invention of [8], the product can be more reliably obtained from the extruded material.

  In the inventions [9] to [16], there can be provided an extruded material cutting device suitably used for the extruded material cutting method according to the above [1] to [8] inventions.

  In the invention of [17], an extrusion facility exhibiting the effects of the invention described above can be provided.

  Next, an embodiment of the present invention will be described below with reference to the drawings.

  In this embodiment, the direction in which the extruded material is extruded by the extrusion press is referred to as “front direction”, and the opposite direction is referred to as “rear direction”.

  In FIG. 1, (10) is an extruded material cutting device according to an embodiment of the present invention. This cutting device (10) is used in an extrusion facility (30) for producing an extruded material (1). More specifically, the cutting device (10) is used in a rear facility of the extrusion facility (30).

  The extruded material (1) is, for example, a round pipe. Moreover, the material of the extruded material (1) is, for example, a metal, and more specifically, aluminum (including an alloy thereof, the same applies hereinafter). Then, the extruded material (1) is cut to a predetermined length by the cutting device (10) of the present embodiment, and as a product (7), a photosensitive drum base pipe, a precision pipe base pipe, etc. Is obtained. The lengths of the products (7) are all the same, and this length is L.

  In the present invention, the shape of the extruded material (1) is not limited to a round pipe shape, and is variously set according to the use of the extruded material (1). It may be a solid bar. Moreover, the material of the extruded material (1) is not limited to aluminum, and various materials are set according to the use of the extruded material (1).

  The extrusion facility (30) includes a cutting device (10), an extrusion press (31), a transport unit (37), and the like.

  The extrusion press (31) includes a container (32) in which an aluminum billet as an extruded material manufacturing material is charged, an extrusion die (33) having an extrusion molding hole (34), and a front side (downstream side) of the extrusion die (33). ) And an end platen (35) having an extrusion material insertion hole (36), a stem (not shown) for pressurizing a billet inserted in the container (32) in the extrusion direction, and an extrusion press (31) are controlled. The control part (31a) to perform is provided. In FIG. 1, (34a) shows the exit of the extrusion hole (34) of the extrusion die (33). B indicates the exit position of the extrusion hole (34).

  In addition to the function of controlling the extrusion press (31), the control unit (31a) for the extrusion press (31) further outputs an in-extrusion signal indicating that the extrusion process is being performed by the extrusion press (31). Control of the cutting device (10) with a function of transmitting and stopping to the control means (11) to be described later of the cutting device (10) and a signal during pushing indicating that the leading billet and the succeeding billet are being pushed. The means (11) has a function of transmitting and stopping.

  In this control unit (31a), the signal during pushing is when the extrusion process is stopped, and the die slide (not shown) holding the extrusion die (33) is moved to the extrusion die (33). ) Is not moved to the exchange side, it is transmitted to the control means (11) as it is currently being pushed over. On the other hand, when the extrusion process is stopped and the die slide is moved to the side for exchanging the extrusion die (33), the pushing is not currently performed, and the extrusion die (33). Assuming that the replacement work is being performed, transmission of the in-pushing signal to the control means (11) is stopped.

  A conveyance part (37) conveys the extrusion material (1) extruded by the extrusion press (31), and its cut piece, for example from the run-out roller table which has many conveyance rollers (not shown). It is configured. And this conveyance part (37) is extended and installed in the extrusion direction front of the extrusion material (1) from the front side position of an end platen (35). In addition, a product table (38) and a waste product table (39) are respectively installed on both sides of the conveyance unit (37) on the downstream side in the conveyance direction with respect to the conveyance unit (37). Each of the product table (38) and the waste product table (39) includes a plurality of receiving portions (not shown) arranged at intervals in the transport direction of the transport portion (37), and the product (7 ) Or the waste product (6) is received by the plurality of receiving portions from below, so that the product (7) or the waste product (6) is horizontally placed on the product table (38) or the waste product table (39). It is supposed to be placed.

  The cutting device (10) includes a traveling cutting means (25), a movement amount measuring means (26), a sorting means (27) and the like, and further includes a control means (11) for controlling the traveling cutting means (25). Contains.

  The traveling cutting means (25) extrudes the extruded material (1) extruded from the outlet (34a) of the extrusion hole (34) at a predetermined extrusion speed by the extrusion press (31). It cuts while moving in synchronization with the speed, and is composed of a flying saw or the like. Moreover, this traveling cutting means (25) is arrange | positioned in the longitudinal direction substantially intermediate position of the conveyance part (37), and is provided with the cutting blade (25a) which cut | disconnects an extrusion material (1). The cutting blade (25a) is composed of a rotatable disc blade or the like. And this cutting blade (25a) is on the cart part (25b) comprised so that it could move along a conveyance part (37) in synchronization with the extrusion speed of an extrusion material (1) at the time of cutting | disconnection of an extrusion material (1). It is mounted on. In addition, in FIG. 1, C has shown the extrusion material cutting position of the traveling cutting means (25).

  In the present invention, the traveling cutting means (25) is not limited to being formed of a flying saw, but may be of other configurations, for example, a flying shear. In this case, the flying shear is exemplified by a configuration in which the extruded material is cut (sheared) by the shear blade as the cutting blade (25a) in a state where the extruded material is clamped by a pair of clamp members from both sides thereof. .

  The movement amount measuring means (26) measures the movement amount of the extruded material (1) extruded by the extrusion press (31), and is between the extrusion die (33) and the travel cutting means (25). More specifically, it is arranged in a fixed state at a position near the traveling cutting means (25) between the extrusion die (33) and the traveling cutting means (25). The movement amount measuring means (26) is composed of a length measuring device or the like.

  The traveling cutting means (25) is configured to cut the extruded material (1) based on the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26).

  The sorting means (27) is disposed between the product table (38) and the waste product table (39), and travels and cuts the cut piece of the extruded material (1) transported by the transport section (37). According to the cutting part of the extruded material (1) by means (25), the product (7) and the waste product (6) are sorted. This sorting means (27) has a pick-up unit (not shown) for picking up the product (7) or waste product (6) and dispensing it to the product table (38) or waste product table (39). Yes.

  The control means (11) includes a computer having a ROM, a RAM, other memory, a CPU, and the like. Based on the measured movement amount of the extruded material (1) measured by the movement amount measurement means (26), the control means (11) The traveling cutting means (25) is controlled so as to cut the material (1) into a predetermined length. The detailed configuration of the control means (11) will be described later.

  Next, the cutting method of the extrusion material (1) using this cutting device (10) is demonstrated below with reference to FIGS.

  In these figures, the pushing influence part (4) as a defective part of the extruded material (1) is shown by cross hatching (see FIGS. 5 to 7), and the pushing influence part of the extruded material (1). A portion other than (4), that is, a superior portion of the extruded material (1) that is a portion that can be used as a product is indicated by dot hatching in order to distinguish it from the pushing influence portion (4). In addition, the length of the pushing influence part (4) is set in advance to a predetermined length (example: several m).

  In the cutting method described below, the cutting of the extruded material (1) by the traveling cutting means (25) always moves in synchronization with the extrusion speed of the extruded material (1), and the moving amount measuring means. This is performed based on the measured movement amount of the extruded material (1) measured by (26).

  As shown in FIG. 1, the extruded material (1) is first extruded from the preceding billet charged in the container (32) by the extrusion press (31). Then, the movement amount of the extruded material (1) is measured by the movement amount measuring means (26).

  And as shown in FIG. 2, the extruded material (1) extruded by the extrusion press (31) is measured based on the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26). A regular cut is made to the product length L by the traveling cutting means (25). As shown in FIG. 3, the cut piece obtained in this way is conveyed by the conveying section (37), and is then delivered to the product table (38) as the product (7) by the sorting means (27).

  The above-described regular cutting process is repeated.

  Then, when the remaining amount of the preceding billet in the container (32) reaches a predetermined amount, that is, when the extrusion processing for the preceding billet is finished, the extrusion processing by the extrusion press (31) is stopped as shown in FIG. Then, the pushed residue is removed by shearing. Then, the subsequent billet is inserted into the container (32), and the subsequent billet and the preceding billet in the container (32) are pushed over. At this time, since the extrusion process is stopped, a stop mark portion (4a) is formed at the exit position B of the extrusion hole (34) in the extruded material (1) (see FIG. 5).

Further, as shown in FIG. 4, when the extrusion process is stopped due to the press-joining of both billets, the extrusion die (33) of the extrusion press (31) is extruded when the extrusion process is stopped. Based on the length Y of the protrusion (2) of the extruded material (1) protruding forward from the outlet position B of the molding hole (34), it can be obtained from the protrusion (2) of the extruded material (1). The maximum number N of products (7) of length L and the length R of the remaining part (3) remaining after obtaining the maximum number N of products (7) from the protrusion (2) of the extruded material (1). The calculation is performed by a first calculation unit (20) described later of the control means (11).

  Here, the length Y of the projecting portion (2) of the extruded material (1) is a predetermined distance W from the exit position B of the extrusion hole (34) to the cutting position C of the traveling cutting means (25). It can be calculated by summing the measured movement amount X of the extruded material (1) from when the extruded material (1) was last cut by the traveling cutting means (25) (ie, Y = W + X). .

  Further, the length region from the front end of the remaining portion (3) of the extruded material (1) to the rear end of the splicing affected portion (4) is a discarded portion in the extruded material (1), and this portion is discarded. Part (5).

  Further, when the extrusion process is stopped, the disposal is performed based on the length S of the discarding part (5), which is the sum of the length R of the remaining part (3) and the length F of the pushing influence part (4). When the part (5) is divided or cut evenly or evenly into a plurality of parts, the divided length Ls such that the length of each divided piece (5s) of the discard part (5) falls within a preset range, and The division number P is calculated by a second calculation unit (21) described later of the control means (11). Here, in the present embodiment, the division length Ls and the division number P of the discard unit (5) when the discard unit (5) is equally divided and cut into a plurality are calculated by the second calculation unit (21). . In the present embodiment, the division number P calculated by the second calculation unit (21) is, for example, two.

  Subsequently, the extrusion process by the extrusion press (31) is resumed in a state in which both billets are pressed together. Then, as shown in FIG. 5, when the extrusion process is resumed based on the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26), The extruded material (1) is cut to the product length L by the traveling cutting means (25) until at least the front end reaches the cutting position C of the traveling cutting means (25). In this embodiment, in detail, when the extrusion process is resumed, the extruded material (1) is cut into the product length L by the maximum number N calculated by the first calculation unit (20). FIG. 5 is a diagram illustrating a state when the maximum number N of the extruded material (1) is cut.

  Next, based on the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26), the discarding portion composed of the remaining portion (3) of the extruded material (1) and the splicing influence portion (4). (5) is divided and cut by the traveling cutting means (25) into the division length Ls and the division number P calculated by the second calculation unit (21). Further, as shown in FIG. 6, the extruded material (1) is cut by the travel cutting means (25) at the rear end position of the discarding portion (5), that is, at the rear end position D of the pushing influence portion (4). The cutting at the rear end position D of the pushing influence portion (4) by the traveling cutting means (25) is performed when the extruded material (1) is divided into lengths Ls from when the waste portion (5) is cut last. The distance W from the exit position B of the extrusion hole (34) to the cutting position C of the traveling cutting means (25) from when the movement is performed or when the extrusion process is resumed. May be performed when the total amount Z of the length F of the push-in influence portion (4) moves (see FIG. 4).

  The division piece (5s) of the disposal part (5) obtained in this way cannot be used as the product (7) because it includes at least a part of the splicing influence part (4). Accordingly, as shown in FIG. 6, the divided piece (5s) of the disposal unit (5) is transported by the transport unit (37), and then is disposed as a waste product (6) by the sorting means (27). ).

  Next, as shown in FIG. 7, based on the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26), the extruded material (1) is moved to the product length L by the traveling cutting means (25). Cut to a standard length.

  By repeating the above steps, a large number of standard products (7) are obtained from the extruded material (1).

  Next, the structure of the control means (11) of the cutting device (10) will be described in detail below.

  The control means (11) travels so as to cut the extruded material (1) to the product length L based on the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26). The cutting means (25) is controlled, and when the pushing influence part (4) is formed as a defective part in the extruded material (1), the pushing material (1) is rear end of the pushing influence part (4). The traveling cutting means (25) is controlled so as to cut at the position D (see FIGS. 4 to 6), and the waste part (5) of the extruded material (1) is set to a predetermined division length Ls and division number P. The traveling cutting means (25) is controlled to divide and cut.

  As shown in FIG. 9, the control means (11) includes a traveling cutting means control section (12) for controlling the traveling cutting means (25) as described above, and in addition, a product length setting section (13). A pushing influence part length setting unit (14), a distance setting unit (15), a sorting means control unit (16), a measurement movement amount determination unit (17), an extrusion processing detection unit (18), A push joint detection unit (19), a first calculation unit (20), a second calculation unit (21), a divided length range setting unit (22), and the like are provided.

  The product length setting unit (13) sets and stores the product length L in advance.

  The pushing influence part length setting part (14) sets and stores in advance the length F of the pushing influence part (4) as a defective part.

  The distance setting unit (15) presets and stores a distance W from the exit position B of the extrusion hole (34) of the extrusion die (33) of the extrusion press (31) to the cutting position C of the traveling cutting means (25). Is.

  The measured movement amount determination unit (17) determines whether or not the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26) has moved by a predetermined amount.

  The extrusion process detection unit (18) detects whether or not the extrusion process by the extrusion press (31) is being performed, that is, an extrusion process signal from the control unit (31a) for the extrusion press (31). Based on the above, it is detected whether or not the extrusion process is being executed. Specifically, in this extrusion process detection unit (18), when an in-extrusion signal is transmitted to the control means (11), it is detected that the extrusion process is being executed, while the in-extrusion process signal is When it is not transmitted to the control means (11), that is, when transmission of the signal during extrusion processing is stopped, it is detected that the extrusion processing is stopped (that is, not executed).

  The push joint detection part (19) functions as a defective part detection part for detecting that the push influence part (4) is formed as a defective part on the extruded material (1). More specifically, the push detection unit (19) detects whether or not the preceding billet and the succeeding billet are pushed in the extrusion press (31), that is, for the extrusion press (31). Based on the signal during pushing from the control unit (31a), it is detected whether or not the pushing is performed. More specifically, when the signal during pushing is transmitted to the control means (11), the pushing detection unit (19) detects that the preceding billet and the succeeding billet are being pushed, On the other hand, when the signal during pushing is not transmitted to the control means (11), it is detected that the pushing is not performed.

  When the extrusion process by the extrusion press (31) is stopped for the splicing of the preceding billet and the subsequent billet, the first calculation unit (20) 34) the length L obtainable from the protrusion (2) of the extruded material (1) based on the length Y of the protrusion (2) of the extruded material (1) protruding forward from the outlet position B of 34). The maximum number N of products (7) and the length R of the remaining portion (3) remaining after obtaining the maximum number N of products (7) from the protrusions (2) of the extruded material (1) are calculated. Is.

  The second calculation unit (21) includes the length R of the remaining part (3) calculated by the first calculation unit (20), and the splicing influence part preset by the splicing influence part length setting part (14). Based on the length S of the discard unit (5) obtained by adding up the length F of (4), each segment piece (5s) of the discard unit (5) when the discard unit (5) is divided and cut into a plurality of sections The division length Ls and the number of divisions P are calculated such that the lengths (that is, the division lengths) are all within the division length range preset by the division length range setting unit (22).

  The division length range setting unit (22) sets and stores the range of the division length Ls of the discard unit (5) in advance. The range of the division length Ls is set to a range in which the division piece (5s) of the disposal unit (5) is easy to handle. More specifically, for example, the division piece (5s) is transferred to the conveyance unit ( 37) is set to a range of a length that can be conveyed, and more preferably, it is set to a length range in which the divided pieces (5s) can be received by a plurality of receiving portions provided in the waste product table (39). The Specifically, the lower limit of the division length Ls is, for example, a number of conveyance rollers in which the division piece (5s) is provided in the conveyance unit (37) when the division piece (5s) is conveyed by the conveyance unit (37). It is set to the minimum length that does not fall from between, and more preferably, the divided piece (5s) is set to the minimum length that does not fall from between the plurality of receiving portions of the waste table (39). On the other hand, the upper limit of the division length Ls is set to, for example, the maximum length that does not exceed the length H of the waste product table (39).

  Here, as the division number P of the discard unit (5) is as small as possible, the discard unit (5) can be cut with high work efficiency. Therefore, the division length Ls and the division number P of the discard unit (5) Is preferably calculated by the second calculator (21) as follows.

  That is, the length S of the waste unit (5) is divided by the length H of the waste product table (39) as the upper limit of the division length Ls, and the fractional value is divided by rounding up the decimal point of the quotient. Let P be the number. Further, the length S of the discard unit (5) is divided by the division number P, and the quotient is set as the division length Ls. It is desirable to calculate the division length Ls and the division number P in this way.

  In the present invention, the calculation method of the division length Ls and the division number P of the discard unit (5) is not limited to the above calculation method.

  The sorting means control unit (16) converts the cut pieces of the extruded material (1) into the product (7) and the waste product (6) (that is, according to the cutting position of the extruded material (1) by the traveling cutting means (25). The sorting means (27) is controlled so as to sort into the divided pieces (5s) of the discard unit (5).

  That is, the sorting means control section (16) starts the cutting of the extruded material (1) by the traveling cutting means (25) and the front end of the splicing influence section (4) is the cutting position of the traveling cutting means (25). Until it reaches C, a cut piece obtained by cutting the extruded material (1) with a fixed length is used as a product (7) obtained by cutting a superior portion of the extruded material (1) as a product table (38). ) To control the sorting means (27) so as to sort out. Further, this sorting means control unit (16) has paid out the maximum number N calculated by the first calculation unit (20) to the product table (38) from the time when the extrusion process is resumed. It has the function to judge.

Further, the sorting means control unit (16) includes the divided piece (5s) of the waste part (5) obtained by dividing and cutting the waste part (5) of the extruded material (1), and the extruded material (1). Dispose of the last split piece (5s) of the waste part (5) obtained by cutting at the rear end position D of the pushing influence part (4) as the waste product (6) to the waste product table (39). The sorting means (27) is controlled so as to sort. Further, the sorting means control unit (16) determines whether or not the division number P calculated by the second calculation unit (21) is paid out to the waste table (39) from the division piece (5s) of the disposal unit (5). It has a function to judge.

  Next, a method for cutting the extruded material (1) using the cutting device (10) will be described below based on the flowchart shown in FIG.

  In step S1, the product length L is input and set in the product length setting section (13) of the control means (11), and the length F of the pushing influence portion (4) is entered in the pushing influence portion length setting section (14). The distance W from the exit position B of the extrusion hole (34) of the extrusion die (33) of the extrusion press (31) to the cutting position C of the traveling cutting means (25) is set in the distance setting section (15). The input is set, and the range of the division length Ls of the disposal part (5) of the extruded material (1) is input and set to the division length range setting part (22). Next, the process proceeds to step S2.

  In step S2, the extrusion process by the extrusion press (31) is started. Then, as shown in FIG. 1, the extruded material (1) having a predetermined cross-sectional shape from the outlet (34 a) of the extrusion hole (34) of the extrusion die (33) of the extrusion press (31) is the end platen (35). It is pushed forward through the extruded material insertion hole (36). Further, an in-extrusion signal indicating that extrusion processing by the extrusion press (31) is being performed is transmitted from the control unit (31a) for the extrusion press (31) to the extrusion processing detection unit (18) of the control means (11). Sent to.

In step S 3, the extruded member (1) by passing through the measurement position of the movement measuring unit (26), the moving amount of the extruded material (1) is measured by the movement measuring means (26).

  In step S4, based on the signal during extrusion from the control unit (31a) for the extrusion press (31), the extrusion detection unit (18) of the control means (11) determines whether or not the extrusion is being performed. To detect. Then, when it is detected that the extrusion process is being executed, that is, during the extrusion process, “YES” is determined and the process proceeds to step S5. On the other hand, when the extrusion process is not executed, that is, when it is detected that the extrusion process is stopped, the process proceeds to step S8 as “NO”.

  In step S5, whether or not the measured movement amount of the extruded material (1) has reached the product length L is controlled based on the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26). This is determined by the measured movement amount determination unit (17) of the means (11). When it is determined that the measured movement amount has reached the product length L, the process proceeds to step S6 as “YES”, and the extruded material (1) is cut by the traveling cutting means (25) as shown in FIG. On the other hand, if it is determined that the measured movement amount has not reached the product length L, “NO” is returned to Step S3.

  In step S7, as shown in FIG. 3, the cut piece obtained by cutting the extruded material (1) in step S6 is delivered to the product table (38) by the sorting means (27) as a product (7). Next, the process returns to step S3.

  The processes from step S3 to step S7 are repeated until the extrusion process is stopped for the joint between the preceding billet and the succeeding billet.

  In step S8, the control means (11) determines whether or not the preceding billet and the succeeding billet are being pushed based on the pushing signal from the control unit (31a) for the extrusion press (31). It is detected by the joint detection unit (19). If it is detected that the pushover is being performed, the process proceeds to step S9 as “YES”. On the other hand, when it is detected that the push-in is not performed, the cutting of the extruded material (1) by the cutting device (10) is terminated as “NO”.

  In step S9, as shown in FIG. 4, the cutting device (10) is in a state where the extrusion process is stopped due to the push-in and is waiting for resumption of the extrusion process, that is, an idle state. In this idle state, that is, during the idle time, the protruding portion (2) of the extruded material (1) protruding forward from the outlet position B of the extrusion hole (34) when the extrusion process is stopped. Based on the length Y, the maximum number N of products (7) obtainable from the protrusion (2) of the extruded material (1) and the maximum number N of products (from the protrusion (2) of the extruded material (1) ( The length R of the remaining part (3) remaining after acquiring 7) is calculated by the first calculation part (20) of the control means (11). Furthermore, the length R of the remaining part (3) calculated by the first calculation unit (20) and the length F of the pushing influence part (4) set in advance by the pushing influence part length setting part (14) Based on the length S of the discard unit (5), the lengths of the divided pieces (5s) of the discard unit (5) are all divided lengths. A division length Ls and a division number P that are within the range of the division length set in advance in the range setting unit (22) are calculated by the second calculation unit (21) of the control means (11). Next, the process proceeds to step S10.

  In step S10, the extrusion process is resumed with the preceding billet and the succeeding billet being pressed. Next, the process proceeds to step S11.

  In step S11, the movement amount of the extruded material (1) is measured by the movement amount measuring means (26). Next, the process proceeds to step S12.

  In step S12, whether or not the measured movement amount of the extruded material (1) has reached the product length L is controlled based on the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26). This is determined by the measured movement amount determination unit (17) of the means (11). When it is determined that the measured movement amount has reached the product length L, the process proceeds to step S13 as “YES”, and the extruded material (1) is cut by the travel cutting means (25). On the other hand, when it is determined that the measured movement amount has not reached the product length L, “NO” is returned to Step S11.

  In step S14, the cut piece obtained by cutting the extruded material (1) in step S13 is delivered to the product table (38) by the sorting means (27) as a product (7). Next, the process proceeds to step S15.

  In step S15, the sorting unit control unit (16) of the control unit (11) determines whether or not the product (7) has been paid out to the product table (38) by the first calculation unit (20). . If it is determined that the payout number of the product (7) to the product table (38) is equal to the maximum number N, the process proceeds to step S16 as “YES”. On the other hand, when it determines with it not being so, it returns to step S11 as "NO".

  In step S16, the movement amount of the extruded material (1) is measured by the movement amount measuring means (26). Next, the process proceeds to step S17.

  In step S17, based on the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26), it is controlled whether or not the measured movement amount of the extruded material (1) has reached the split length Ls. This is determined by the measured movement amount determination unit (17) of the means (11). When it is determined that the measured movement amount has reached the divided length Ls, the process proceeds to step S18 as “YES”, and the waste part (5) of the extruded material (1) is cut by the travel cutting means (25). On the other hand, when it is determined that the measured movement amount has not reached the division length Ls, “NO” is returned to Step S16.

  In step S19, the division piece (5s) obtained by dividing and cutting the waste portion (5) of the extruded material (1) in step S18 is used as a waste product (6) by the sorting means (27) to the waste product table (39). ) (See FIG. 6). Next, the process proceeds to step S20.

  In step S20, the sorting unit control unit (16) of the control unit (11) determines whether or not the waste product (6) has been paid out to the waste table (39) by the division number P calculated by the second calculation unit (21). judge. And when it determines with the number of payout to the waste product table (39) of a waste product (6) being equal to the division | segmentation number P, it returns to step S3 as "YES". On the other hand, if it is determined that this is not the case, “NO” is returned to step S16.

  Thus, the extruded material cutting method of this embodiment has the following advantages.

  In the extruded material cutting method of the present embodiment, the extruded material (1) is moved to the product length by the traveling cutting means (25) based on the measured movement amount of the extruded material (1) measured by the movement amount measuring means (26). Since the length is cut to a length L, the length product (7) can be reliably obtained from the extruded material (1). Further, when the pushing influence part (4) is formed as a defective part in the extruded material (1), the pushing material (1) is cut at the rear end position D of the pushing influence part (4). Product removal from the material (1) can be performed from the rear end position D of the push-affected part (4) of the extruded material (1), that is, when obtaining the product (7) from the extruded material (1). The front end position of the product (7) to be acquired can be set to the front end position of the excellent part formed on the rear side of the push-affected part (4) of the extruded material (1). Thereby, the yield of a product (7) can be improved.

Furthermore, when the extrusion process by the extrusion press (31) is stopped to push the billets together, and then the extrusion process is resumed, the extruded material (1) is removed from the time when the extrusion process is resumed. When the total amount Z of the distance W set in the distance setting part (15) and the length F of the push-in influence part (4) is moved, the extruded material (1) is cut by the traveling cutting means (25), Thus, by performing the cutting at the rear end position D of押継technique affected zone by running cutting means (25) (4), at the rear end position D of押継technique affected zone the extruded material (1) (4) It can be cut reliably.

  Further, the extruded material (1) is moved to the product length by the traveling cutting means (25) until the front end of the pushing influence portion (4) of the extruded material (1) reaches at least the cutting position C of the traveling cutting means (25). By performing the regular cutting to L, the regular product (7) can be more reliably obtained from the extruded material (1).

Further, the extruded material (1) is cut to the product length L by the traveling cutting means (25) until the extrusion processing by the extrusion press (31) is stopped to push the billets together, and the extrusion processing is stopped. When the extrusion process is resumed after the extrusion process, since the extrusion process is resumed, the extruded material (1) is cut to the product length L by the maximum number N calculated by the first calculation unit (20). The regular product (7) can be obtained more reliably from the extruded material (1).

  Actually, when a large number of standard products (7) are obtained by cutting the extruded material (1) under the conditions shown below by the cutting method shown in this embodiment, it is compared with the conventional method. As a result, the yield was improved by about 8%.

Billet diameter: φ155mm
Extruded material (1) outer diameter: φ35mm
Inside diameter of extruded material (1): φ33mm
Extrusion speed of extruded material (1): 50 mm / s
Length F of push-affected zone (4): 2m
Distance W: 10m
Product (7) length L: 3 m
Further, when the waste part (5) of the extruded material (1) is divided and cut into a plurality of the waste part (5), the length of each divided piece (5s) of the waste part (5) is the divided length. Since it is divided and divided into a division length Ls and a division number P that fall within the range of the division length preset by the range setting unit (22), the disposal unit (5) is surely divided into a length that is easy to handle. be able to.

  Furthermore, since the waste part (5) of the extruded material (1) is divided and cut into the division length Ls and the division number P calculated by the second calculation part (21), the disposal part (5) is made easy to handle. Furthermore, it can divide reliably.

  Further, the cut pieces obtained by cutting the extruded material (1) by the traveling cutting means (25) are discarded from the product (7) according to the cutting position of the extruded material (1) by the traveling cutting means (25). Since the product (6) (that is, the divided part (5s) of the waste unit (5)) is sorted, it is possible to reliably prevent the waste product (6) from being mixed into the product (7).

  Moreover, since the extrusion equipment (30) which concerns on this embodiment is equipped with the said cutting device (10), there exists an advantage similar to the above.

  Therefore, in the said embodiment, the case where the extrusion material (1) in which the splicing influence part (4) was formed as a defective part is cut | disconnected by the cutting method which concerns on this invention is shown. However, in the present invention, in addition, during the extrusion process, when cutting the extruded material in which the defective part is formed due to the occurrence of abnormalities in the extrusion process conditions such as container temperature, extrusion pressure, extrusion speed, and cooling, The cutting method according to the present invention may be applied. The cutting method in that case will be described as follows.

  In other words, if the defective part is formed by the occurrence of an abnormality in the extrusion process conditions, the portion that was extruded between the time when the abnormality occurred in the extrusion process condition and the normal recovery of the extrusion process condition The extruded material (1) is fixed to the product length L by the traveling cutting means (25) until the front end of the defective portion of the extruded material (1) reaches at least the cutting position C of the traveling cutting means (25). Disconnect. When a defective portion is formed on the extruded material (1), the extruded material (1) is cut at the rear end position D of the defective portion by the traveling cutting means (25).

In this case, the control unit of the cutting device (10) (11), extrusion conditions (container temperature, extrusion pressure, extrusion rate, cooling, etc.) abnormality detection unit (temperature sensor abnormality will detect that it has occurred, a pressure sensor, a velocity sensor, etc.), and a defective portion detection unit for detecting that the failure portion is formed on the abnormality on the accompanying extruded material generated (1) on the extrusion conditions, leaving these detection based on the detection result of the part and the measuring the amount of movement of the extruded material was measured by the movement measuring means (26) (1), the front end of the defective portion of the extruded material (1) is at least running cutting means (25) The traveling cutting means (25) is controlled so that the extruded material (1) is cut to the product length L until reaching the cutting position C, and the defective portion of the extruded material (1) is detected by the defective portion detecting section. When it is done, the extruded material (1) is cut at the rear end position D of the defective part. It has been made as to control the traveling cutting means (25) so.

  Further, in the present invention, when a defective portion is formed on the extruded material (1), the defective portion of the extruded material (1) is marked with a marking device or the like, and in this state, the extruded material (1) is attached to the extruded material (1). As described in the present embodiment, the traveling cutting means (25) may be used for cutting.

  Further, in the present invention, there are defective portions such as cavities and dents in the billet, and by performing extrusion using such a billet, the defective portion caused by the defective portion of the billet is extruded material ( Even if it is formed in 1), the extruded material cutting method and cutting device according to the present invention can be applied.

In this case, the control unit of the cutting device (10) (11) is provided with a defective portion detection unit that it detects that a defect portion is formed in the extruded material (1), detection of the detection unit Based on the result and the measured moving amount of the extruded material (1) measured by the moving amount measuring means (26), the front end of the defective portion of the extruded material (1) is at least at the cutting position C of the traveling cutting means (25). When the travel cutting means (25) is controlled so as to cut the extruded material (1) to the product length L until it reaches, and the defective portion is detected in the extruded material (1) by the defective portion detection unit, The traveling cutting means (25) is controlled so as to cut the extruded material (1) at the rear end position D of the defective portion.

  Although several embodiments of the present invention have been described above, the present invention is not limited to those shown in the above embodiments, and various modifications can be made.

  For example, in the above embodiment, the length L of the product (7) obtained from the extruded material (1) is a standard, but in the present invention, the length L of the product (7) is a standard. The length L of the product (7) is not necessarily limited.

  Moreover, in the said embodiment, although the discard part (5) of the extrusion material (1) is equally divided and cut into multiple pieces by the traveling cutting means (25), in the present invention, the traveling cutting means ( 25) may be divided and cut non-uniformly into a plurality.

  INDUSTRIAL APPLICABILITY The present invention is applicable to a method for cutting an extruded material extruded by an extrusion press, a device for cutting the extruded material used in the cutting method, and an extrusion facility equipped with the cutting device.

Figure 1 is a schematic Ryakutaira view showing a state before cutting the extruded material by cutting device of the extruded material according to an embodiment of the present invention. FIG. 2 is a schematic plan view showing a state when the extruded material is cut into a product length by the cutting device. FIG. 3 is a schematic plan view showing a state when a product as a cut piece of the extruded material is delivered to the product table by the sorting means of the cutting apparatus. FIG. 4 is a schematic plan view showing a state in which the extrusion process is stopped due to the joining between the preceding billet and the succeeding billet. FIG. 5 is a schematic plan view showing a state when the maximum number of the extruded material is cut to the product length by the same cutting device after the extrusion process is resumed. FIG. 6 is a schematic plan view showing a state when the extruded material is cut at the rear end position of the pushing influence portion as a defective portion by the cutting device. FIG. 7 is a schematic plan view showing a state when the divided pieces of the waste section as waste products are paid out to the waste product table by the sorting means of the cutting apparatus. FIG. 8 is a flowchart of a cutting method using the same cutting apparatus. FIG. 9 is a block diagram showing the configuration of the cutting apparatus.

DESCRIPTION OF SYMBOLS 1 ... Extruded material 2 ... Protruding part 3 ... Residual part 4 ... Pushing influence part (defective part)
DESCRIPTION OF SYMBOLS 5 ... Waste part 5s ... Divided piece 6 ... Waste product 7 ... Product 10 ... Cutting device 11 ... Control means 13 ... Product length setting part 14 ... Pushing influence part length setting part 15 ... Distance setting part 16 ... Sorting means control part 20 ... 1st calculation part (calculation part)
21 ... 2nd calculation part 22 ... division | segmentation length range setting part 25 ... travel cutting means 26 ... movement amount measurement means 27 ... sorting means 30 ... extrusion equipment 31 ... extrusion press 33 ... extrusion die 34 ... extrusion molding hole 34a ... outlet 37 ... transport section 38 ... product table 39 ... waste product table B ... exit position C of the extrusion hole ... cutting position D of the travel cutting means ... rear end position of the splicing influence part (rear end position of the waste part)
R: Length of remaining portion F: Length of pushing influence portion S: Length of disposal portion L: Length of product Ls: Division length of waste portion P: Number of divisions of waste portion

Claims (17)

Traveling cutting means for cutting the extruded material extruded by the extrusion press while moving in synchronization with the extrusion speed of the extruded material;
A moving amount measuring means for measuring the moving amount of the extruded material;
Including an extruded material cutting device,
Based on the measured movement amount of the extruded material measured by the movement amount measuring means, the extruded material is cut into a product length by the traveling cutting means,
When a defective part is formed in the extruded material, the extruded material is cut by the traveling cutting means at the rear end position of the defective part.   The method for cutting an extruded material according to claim 1, wherein the product length is a fixed length.   In the case where the defective portion is formed by the pushing of the preceding billet and the succeeding billet, the pushing influence portion having a preset length is set as the defective portion, and an extruded material is used as the pushing influence portion. The method for cutting an extruded material according to claim 1 or 2, wherein the traveling cutting means cuts at a rear end position. The cutting device is
A distance setting unit that presets the distance from the exit position of the extrusion hole of the extrusion press to the cutting position of the traveling cutting means;
When the extrusion process by the extrusion press is stopped for the joint between the billets, and then the extrusion process is resumed, the extrusion material is affected by the distance and the joint effect when the extrusion process is resumed. 4. The extrusion according to claim 3, wherein when the total amount with respect to the length of the portion is moved, the extruded material is cut by the traveling cutting means, and thereby, cutting is performed at the rear end position of the push-affected portion by the traveling cutting means. How to cut the material.   The extruded material cutting method according to claim 3 or 4, wherein the extruded material is cut into a product length by the traveling cutting means until at least a front end of the push-affected influence portion of the extruded material reaches a cutting position of the traveling cutting means. The cutting device is
When the extrusion process by the extrusion press is being stopped for the purpose of pushing the two billets together, the extrusion projecting forward from the exit position of the extrusion hole of the extrusion press when the extrusion process is stopped Based on the length of the protruding part of the material, it has a calculating part that calculates the maximum number of products that can be obtained from the protruding part of the extruded material,
The extruded material is cut into the product length by the traveling cutting means until the extrusion process by the extrusion press is stopped for the joint between the billets,
The extrusion material cutting method according to claim 3 or 4 , wherein when the extrusion process is resumed, at least the maximum number of the extruded material is cut into a product length by the traveling cutting means from the time when the extrusion process is resumed.   In the case where the defective part is formed due to an abnormality in the extrusion process condition, a portion extruded from when the abnormality occurs in the extrusion process until the extrusion process is normally recovered 3. The method for cutting an extruded material according to claim 1, wherein the extruded portion is cut by the traveling cutting means at a rear end position of the defective portion.   The extruded material cutting method according to claim 7, wherein the extruded material is cut into a product length by the traveling cutting means until at least a front end of the defective portion of the extruded material reaches a cutting position of the traveling cutting means. Traveling cutting means for cutting the extruded material extruded by the extrusion press while moving in synchronization with the extrusion speed of the extruded material;
A moving amount measuring means for measuring the moving amount of the extruded material;
Control means for controlling the travel cutting means;
Contains
The control means includes
Based on the measured movement amount of the extruded material measured by the movement amount measuring means, the travel cutting means is controlled to cut the extruded material into a product length, and
An apparatus for cutting extruded material, characterized in that, when a defective portion is detected in the extruded material, the traveling cutting means is controlled so as to cut the extruded material at a rear end position of the defective portion.   10. The extruded material cutting apparatus according to claim 9, wherein the product length is a fixed length. The control means includes
In the case where the defective portion is formed by the pushing of the preceding billet and the succeeding billet, the pushing influence portion having a preset length is set as the defective portion, and an extruded material is used as the pushing influence portion. The extruded material cutting apparatus according to claim 9 or 10, wherein the traveling cutting means is controlled to cut at a rear end position. The control means includes
A distance setting unit that presets the distance from the exit position of the extrusion hole of the extrusion press to the cutting position of the traveling cutting means;
When the extrusion process by the extrusion press is stopped for the joint between the billets, and then the extrusion process is resumed, the extrusion material is affected by the distance and the joint effect when the extrusion process is resumed. The travel cutting means is controlled so as to cut the extruded material when the total amount with the length of the portion is moved, and thereby the extruded material is cut at the rear end position of the push-affected portion. Item 12. The extruded material cutting device according to Item 11. The control means includes
The extruded material according to claim 11 or 12, wherein the traveling cutting means is controlled so that the extruded material is cut into a product length until at least a front end of the push-affected portion of the extruded material reaches a cutting position of the traveling cutting means. Cutting device. The control means includes
When the extrusion process by the extrusion press is being stopped for the purpose of pushing the two billets together, the extrusion projecting forward from the exit position of the extrusion hole of the extrusion press when the extrusion process is stopped Based on the length of the protruding portion of the material, with a calculation unit that calculates the maximum number of products that can be obtained from the protruding portion of the extruded material,
Controlling the traveling cutting means so as to cut the extruded material into a product length until the extrusion process by the extrusion press is stopped for the joint between the billets;
The extruded material according to claim 11 or 12 , wherein when the extrusion process is resumed, the traveling cutting means is controlled so as to cut at least the maximum number of the extruded material into a product length from the time when the extrusion process is resumed. Cutting device. The control means includes
In the case where the defective part is formed due to an abnormality in the extrusion process condition, a portion extruded from when the abnormality occurs in the extrusion process until the extrusion process is normally recovered The cutting apparatus for an extruded material according to claim 9 or 10, wherein the traveling cutting means is controlled so as to cut the extruded material at a rear end position of the defective portion. The control means includes
16. The extruded material cutting device according to claim 15, wherein the traveling cutting means is controlled so as to cut the extruded material into a product length until at least a front end of the defective portion of the extruded material reaches a cutting position of the traveling cutting means. .   An extrusion facility comprising the extruded material cutting device according to any one of claims 9 to 16.

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