JP6218699B2 - Bar cutting machine - Google Patents

Description

  The present invention relates to a bar cutting machine that feeds a bar to a bar cutting mechanism in order to cut a long bar such as a round bar, a pipe, or a deformed bar. It relates to shortening technology.

  A feeding device that feeds the bar material by a predetermined cutting length in the axial direction while holding the bar material with the feeding vise, and grips the fed bar material with the main vice straddling both sides of the circular saw, and the bar material There is known a bar cutting machine provided with a cutting machine that uses a circular saw to cut perpendicularly to the axis. This bar cutting machine repeats the steps of feeding the bar by a predetermined length (cutting length) by the feeding device and then cutting by a thin circular saw provided in the cutting machine. A plurality of parts having the above-mentioned cutting length are cut from a bar material. When the remaining length of cutting of one bar becomes shorter than a predetermined value, it is distributed separately from the product as a rear end material and discarded. In this conventional bar cutting machine, the main vise is fixed to the main body of the device, and the feeding device is held by the sending side vise and feeds the bar, so it is based on the material presser width of each of the main side vice and the sending side vise. The above-mentioned default value is set, but the rear end material having a length of 55 mm or more is generated at the minimum. In order to increase the product yield obtained from one bar, a technique for further shortening the length of the rear end material is desired.

  On the other hand, for example, a bar cutting machine described in Patent Document 1, Patent Document 2, and Patent Document 3 has been proposed.

JP 2011-161572 A JP 2012-061352 A JP 2001-293615 A

  However, the techniques described in Patent Document 1, Patent Document 2, and Patent Document 3 have the following disadvantages.

  In the bar cutting machine of Patent Document 1, the main vice is divided into an input side vice fixed to the apparatus main body and an output side vise that is reciprocated with a predetermined stroke in the longitudinal direction of the bar. Since the bar is gripped and the bar is pulled out and cut between the entry-side vise and the exit-side vise, a dedicated drive device and a guide for moving the exit-side vice are required. In order to prevent interference with the bar gripped by the entry vise when returning the cut circular saw to the original position, the circular saw is bent using an air blow and returned to the original position while being retracted. Therefore, it was impossible to bend the circular saw and the avoidance of interference was unstable.

  Moreover, in the bar cutting machine of patent document 2, there is no entry side vise, and it is a system which draws out a bar from a feed vise driven reciprocally and a position fixed main vise, and cuts it with a circular saw. For this reason, the configuration of the apparatus becomes simple and inexpensive. However, since the feeding vise cannot use the bar cutting time to go to the next bar holding position, the cutting cycle becomes long and the cutting ability per unit time is low.

  Moreover, the bar cutting machine of patent document 3 adds the holding member which pulls out a bar from a main vice to the conventional bar cutting machine which has a feeding vise and a main vice. According to this apparatus, the length of the rear end edge of the bar can be reduced because the bar can be moved to the main vice by holding the holding member without using a feeding vise when cutting the rear end. Is done. However, it is not only difficult to retract the circular saw to cut the bar in the main vice, but it is also necessary to protrude the gripping allowance for the gripping member to grip from the main vice, so the minimum cutting of the bar There is a length limitation.

  The present invention has been made against the background of the above circumstances, and the object of the present invention is to provide a bar cutting machine in which the minimum cutting length of the bar is not restricted and the trailing end can be made smaller. There is to do.

To achieve the above object, the gist of the present invention is: (a) a feeding vise that is reciprocally driven along the longitudinal direction of the bar, and feeds the bar toward the cutting position by a predetermined cutting length; , A main vise provided across the cutting position for gripping the bar during cutting, and reciprocating toward the bar to cut the bar gripped by the main vice (B) The main vice is located on the feeding vise side with respect to the cutting position and is movable in the longitudinal direction of the bar. And (c) the remaining length of the bar is greater than or equal to a predetermined length. When the fixing device for fixing the longitudinal movement of the bar of the entry side vice; (D) When the remaining length of the bar is less than a predetermined length, the fixing by the fixing device is released and the input side vise is connected to the input vise and the input side vise is connected to the input vise. and vice coupling device for moved, seen including, (e) the infeed device is provided with infeed fixing claws, and infeed movable pawl provided to be closer away from the said transmission write fixing claws, feed The feed movable claw is driven by a feed vise actuator so as to grip the bar, and (f) the entry side vise approaches the entry side fixed claw and the entry side fixed claw. An entrance-side movable claw provided to be separable, and configured to grip the bar by driving the entrance-side movable claw by an entrance-side vise actuator, and (g) the vise coupling device is The entry side from the feed fixed claw and the feed movable claw of the feed vise A pair of gripping protrusions projecting toward the chair side, and a gripped portion provided on the entry-side vise and gripped by the pair of gripping projections, (h) the gripped portion is the input side A receiving surface for receiving the bar material is formed between the entry-side fixed claw and the entry-side movable claw of the vice and has a width dimension larger than the maximum dimension of the bar material in the gripping direction. It is in.

According to the bar cutting machine of the present invention, the main vice provided across the cutting position is located on the feeding vise side with respect to the cutting position and is movable in the longitudinal direction of the bar. An entry-side vise and a fixed-position exit vise located on the opposite side of the cutting position with respect to the cutting position, and when the remaining length of the bar is equal to or greater than a predetermined value, A fixing device for fixing the longitudinal movement of the bar of the side vice, and when the remaining length of the bar is less than a predetermined length, the fixing by the fixing device is released and the entry side to the feeding vise and vice coupling device for linked vice moving the said input-side device with said transmission write device, seen including, the infeed device includes a infeed fixed claws, can move toward and away from relative said transmission write fixing claw Provided with a feed movable claw, and a feed vise actuator The feeding movable claw is configured to grip the bar when driven, and the entry side vise is provided with an entry side fixed claw and an entry side provided to be able to approach and separate from the entry side fixed claw. A movable side claw, and is configured to grip the bar when the incoming side movable claw is driven by an incoming side vise actuator, and the vise coupling device includes: The gripping portion includes a pair of gripping protrusions protruding from the feed movable claw to the entry side vise side, and a gripped portion provided on the entry side vise and gripped by the pair of gripping projections. Constitutes a receiving surface for receiving the bar material between the input side fixed claw and the input side movable claw of the input side vise, and has a width dimension larger than the maximum dimension of the bar material in the gripping direction. Have. From this , when the remaining length of the bar becomes less than a predetermined length, the input side vice and the feed vise are integrated by the vise coupling device, and the input side vice functions as a feed vise for feeding the bar. Is sent to the exit vise, so that the rear end material of the bar is made smaller. In addition, since the input side vice and the input vice are integrated by the vice coupling device, and the input side vise is driven by the input device for the input vise, the input device for the input side vice becomes unnecessary, and the bar There is an advantage that the material cutting machine is inexpensive. Furthermore, it is not necessary to protrude a grip allowance for gripping by the gripping member from the main vice, and the minimum cutting length limitation of the bar is suitably reduced.

Here, preferably, during the cutting of the bar held by the entry-side vise and the exit-side vise, the feeding vice is moved backward to replace the bar. This prevents a prolonged cutting cycle.

  Preferably, the bar held by the feeding vise or the entry vise is pulled back by a predetermined dimension after the bar is cut and before the cutting tool is returned to the original position. Such a retracting operation prevents interference between the cutting tool and the bar, which is returned to the original position after cutting.

It is a perspective view which shows the principal part of the bar cutting machine which is one Example of this invention. It is the reverse view which looked at the entrance side vise of the bar cutting machine of FIG. 1 from back. It is the front view which looked at the entrance side vise of the bar cutting machine of FIG. 1 from the circular saw side, Comprising: It is a figure which shows the state which sends in a bar material only by a feed vise. FIG. 4 is a front view similar to FIG. 3, illustrating a state in which a bar is fed by an entry side vise connected to a feeding vise. It is a perspective view which expands and shows the bar cutting machine of FIG. It is a perspective view which shows the principal part of the conventional bar cutting machine, Comprising: It is a figure corresponding to FIG. It is a front view of the bar cutting machine of FIG. 5, Comprising: It is a figure corresponding to FIG. 3 or FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a bar cutting machine 10 according to an embodiment of the present invention. The bar cutting machine 10 holds a part of a bar 14 which is a metal workpiece such as round steel, square steel, steel pipe, etc., and cuts the bar 14 by a predetermined cutting length in the axial direction. In order to feed inwardly, the feed rail 16 is provided so as to be movable by being guided in a direction parallel to the bar 14 by a plurality of (two in this embodiment) transport rails 16 provided in a fixed position on a base (not shown). A feed vise 18 and a feed drive device (not shown) that is configured by a hydraulic cylinder, a pneumatic cylinder, an electric motor actuator, and the like and that reciprocates the feed vise 18 are provided.

  The bar cutting machine 10 is provided with a metal circular saw 20 that is continuously driven to rotate by a circular saw drive motor as a cutting tool. Can be lowered or raised. The position where the circular saw 20 crosses the bar 14 when lowered is the cutting position A.

  The feeding vise 18 includes a feeding fixing claw 18a and a feeding movable claw 18b provided so as to be able to approach and separate from the feeding fixing claw 18a, and includes a hydraulic cylinder, a pneumatic cylinder, an electric motor, and the like. When the movable claw 18b is driven by the feeding vise actuator 18c, the bar 14 is gripped by the feeding vise 18. In the feeding vise 18, the inner side surface of the feeding fixing claw 18 a functions as a lateral reference surface that is a reference for the position in the horizontal direction (horizontal direction) of the bar 14 to be fed, and is movable with the feeding fixing claw 18 a. The horizontal receiving surface 18d between the claws 18b functions as a height reference surface which is a reference for the height position of the bar 14 to be fed.

  In the bar cutting machine 10 of the present embodiment, the main vise that holds the tip of the bar 14 when cutting by the circular saw 20 is an entry side vice 22 that is positioned on the feeding vise 18 side with respect to the cutting position A; The cutting position A is divided into an outgoing vise 24 located on the opposite side of the feeding vise 18.

  As shown in FIG. 2, the entry-side vice 22 includes a plurality of conveying rails 16 provided at a fixed position on a base 25 and a plurality of guide rails 26 provided at a fixed position in parallel therewith. 14 is guided in a direction parallel to the feed vise 18 and is reciprocated with a predetermined stroke together with the feed vise 18, and the guide rail 26 is gripped by air pressure to enter the input vise 22. Is provided with a clamper 28 for fixing at a predetermined position.

  The feed fixing claw 18a and the feed movable claw 18b of the feeding vise 18 include a pair of gripping projections 18e and gripping projections 18f that project toward the entry side vice 22 side. The ends of the claw 22a and the entrance movable claw 22b on the feeding vice 18 side are partially deleted, and the gripped object can be gripped or sandwiched by the pair of gripping projections 18e and gripping projections 18f of the feed vise 18 The part 22e is formed in a stepped shape. The gripping direction dimension of the gripped portion 22e is larger than the maximum dimension of the bar 14. As a result, when the gripped portion 22e of the entry side vice 22 is gripped by the pair of grip projections 18e and grip projections 18f of the feed vise 18, the entrance side vise 22 and the feed vise 18 connected to each other are The reciprocating movement can be integrally performed by the feeding drive device (not shown). The pair of gripping protrusions 18e and gripping protrusions 18f and the gripped part 22e gripped by them function as a vise coupling device.

  FIG. 3 shows a state in which the entry-side vice 22 is not connected to the feeding vice 18 and is fixed at a predetermined position by a pneumatic clamper 28, and FIG. 4 shows the entry-side vice 22 being in the feeding vise 18. And the clamp by the clamper 28 is released, and the entry side vice 22 and the feeding vise 18 are allowed to reciprocate.

  In addition, the entry side vice 22 is provided with a pressing device 30 for pressing the bar 14 from above to fix the bar 14. The pressing device 30 includes a pressing claw 30a provided so as to be movable in the vertical direction, and a pressing claw driving device 30b configured by a hydraulic cylinder, a pneumatic cylinder, an electric motor actuator, and the like to drive the pressing claw 30a. For example, at the time of cutting, a portion of the bar 14 held by the entry side vice 22 is pressed by the pressing claw 30a.

  The entry-side vise 22 includes an entry-side fixed claw 22a and an entry-side movable claw 22b provided so as to be able to approach and separate from the entry-side fixed claw 22a, and includes a hydraulic cylinder, a pneumatic cylinder, an electric motor, and the like. When the movable claw 22b is driven by the entry side vise actuator 22c, the bar 14 fed by the feed vise 18 is gripped. In the entry-side vise 22, the inner side surface of the entry-side fixed claw 22a functions as the lateral reference surface that is a reference for the lateral position of the bar 14 to be fed, and the entry-side fixed claw 22a, the entry-side movable claw 22b, The horizontal receiving surface 22d in between functions as the height reference surface, which is a reference for the height position of the rod 14 to be fed.

  Further, the exit side vise 24 includes an exit side fixed claw 24a provided in a fixed position on a base (not shown), and an exit side movable claw 24b provided so as to be close to and away from the exit side fixed claw 24a. The output side movable claw 24b is driven by the output side vise actuator 24c composed of a hydraulic cylinder, a pneumatic cylinder, an electric motor, and the like, so that the bar 14 supplied by the input vise 18 or the input side vice 22 is gripped. It has come to be. In the exit side vise 24, the inner side surface of the exit side fixed claw 24a functions as the lateral reference surface which is a reference for the lateral position of the bar 14 to be fed, and the exit side fixed claw 24a, the exit side movable claw 24b, The horizontal receiving surface 24d in between functions as the height reference surface, which is a reference for the height position of the rod 14 to be fed. The receiving surface 24d is set to have a small width dimension in the feeding direction, and a part of the cut bar 14 can be easily dropped.

  In the bar cutting machine 10 configured as described above, the following control operation is performed by the electronic control device 50 provided therein. In the electronic control unit 50, for example, based on a signal from a sensor that detects the rear end of the bar 14, the rear end of the bar 14 is set to a gripping margin that is predetermined to about 5 to 10 mm, for example, by the feeding vise 18. It is determined whether or not the entire length of the bar 14 is sufficiently long so that the rod 14 can be reliably gripped. While it is determined that the total length of the bar 14 is sufficiently long, the entrance vise 22 is fixed (clamped) to the guide rail 26 by the clamper 28, and the fixed feed of the bar 14 is performed only by the feeding vise 18. The cutting cycle to be performed is repeatedly executed. FIG. 3 shows this state.

  In the above-described cutting cycle, first, the infeed vise 22 and the exit vise 24 are opened, and then the bar 14 corresponding to a predetermined cutting length is fed by the feeding vise 18 and then the incoming vise. 22 and the exit vise 24 hold the tip of the bar 14, and the tip of the bar 14 is pressed from above by the pressing claw 30a of the pressing device 30 provided on the entry vise 22. Next, the circular saw 20 is lowered by an up-and-down mechanism (not shown), so that the tip portion of the bar 14 is cut with a cutting length having a thickness corresponding to the feed dimension by the feed vise 18. The distal end portion of the bar 14 that has been cut to a certain size is dropped into a predetermined collection container by opening the outlet vise 24.

  During the cutting period in which the circular saw 20 is lowered, the gripping of the feeding vise 18 is released and retracted by a fixed size, so that the bar 14 is re-gripped. Before the circular saw 20 starts to be raised to the original position following the cutting period, the bar 14 is retracted by a relatively small preset retraction dimension (retraction dimension) by the feeding vise 18. A retraction operation is performed to prevent interference between the tip of the saw and the circular saw 20. Strictly speaking, the cutting length is a value obtained by subtracting the thickness t of the circular saw 20, for example, 2 mm, from the feeding dimension of the feeding vise 18.

  It is determined that the entire length of the bar 14 has been shortened to some extent by repeatedly executing the above-described cutting cycle, making it difficult for the rear end portion of the bar 14 to be gripped by the feeding vise 18 with a predetermined holding allowance. When the clamper 28 is unclamped, the entrance vise 22 is released from being fixed to the guide rail 26, and the gripped portion 22e of the entrance vise 22 is gripped by the fixed claw 18a and the movable claw 18b of the feed vise 18. Thus, the entrance vise 22 and the feed vise 18 connected to each other can be integrally reciprocated by a feed drive device (not shown) so that the bar 14 can be fed in a fixed size. The In this state, similarly to the cutting cycle, the cutting cycle including the retraction operation is repeatedly executed. FIG. 4 shows this state. This cutting cycle is stopped when it becomes difficult to obtain a cutting material having a preset cutting thickness from the bar 14. In this cutting cycle, the bar 14 is not replaced by the entry vice 22 within the cutting period in which the circular saw 20 is lowered. After cutting the bar 14, the bar 14 protrudes from the entry side vice 22 toward the exit side vice 24 by a predetermined dimension of about 10 mm, for example, and moves in a direction in which the entry side vice 22 approaches the exit side vise 24 ( In a state in which the tip end portion of the bar 14 is gripped by the exit vise 24, the entry vise 22 is retracted by a predetermined size, and the bar 14 is re-gripped.

  In the bar cutting machine 10 of the present embodiment, the distances D1 and D2 from the entry vise 22 and the exit vise 24 to the cutting position A at the time of cutting are set to 10 mm and 7.5 mm, respectively, Sometimes the entry vise 22 is set so as to be close to the exit vise 24 up to 1 mm. Further, the minimum gripping margin of the entry side vice 22 at the time of cutting is set to 10 mm, for example. The entrance vise 22 and the feed vise 18 connected to each other feed the bar 14 in a fixed size by one or a plurality of feed strokes. In the bar cutting machine 10 of the present embodiment, the size of the rear end material that becomes the end cut of the bar 14 is about 20 mm.

  5 is a perspective view showing the bar cutting machine 100 before improvement and corresponding to FIG. 1, and FIG. 6 is a front view of the conventional bar cutting machine 100 of FIG. FIG. 5 is a front view corresponding to FIG. 4. In the bar cutting machine 100, the main vise 102 is mechanically different in that the main vise 102 is not divided and is provided in a fixed position, but the other is common to the bar cutting machine 10. The common parts are denoted by the same reference numerals as those of the bar cutter 10 and the description thereof is omitted.

  5 and 6, the main vise 102 is close to a pair of fixed claws 106a and 106b provided in a fixed position across a groove 104 through which the circular saw 20 passes, and the pair of fixed claws 106a and 106b. A pair of movable claws 108a and 108b provided so as to be separated from each other, and the movable claws 108a and 108b are driven by a main vise actuator 108c composed of a hydraulic cylinder, a pneumatic cylinder, an electric motor, etc. The bar 14 that has been fixedly fed by the vice 18 is gripped. A pressing device 30 for fixing the bar 14 by pressing the bar 14 from above is provided to fix the position.

  In the bar cutting machine 100 shown in FIG. 5 and FIG. 6, the rear end material of the bar 14 is the gripping allowance H of the feeding vise 18, the longitudinal dimension K of the bar 14 of the fixed claw 106a, and the fixed claw 106a. It was not possible to make it shorter than the added value of the dimension α between and the cutting position A. On the other hand, in the bar cutting machine 10 in which the entry side vice 22 also functions as a feeding vise for the bar 14, the longitudinal dimension of the bar 14 of the entry vise 22 is not added, and the bar The rear end material of the material 14 can be significantly shortened.

  As described above, according to the bar cutting machine 10 of the present embodiment, the fixed vice side exit vice where the main vice provided across the cutting position A is located at the cutting position A as a boundary. 24 and an inlet side vice 22 movable in the longitudinal direction of the bar, and when the remaining length of the bar 14 is not less than a predetermined length, the clamper 28 fixes the inlet side vice 22 and stops its movement. (Fixing device) and a vise connecting device (18e, 18f, 22e) for connecting and moving the feeding vise 18 and the incoming vise 22 together when the remaining length of the bar 14 is less than a predetermined length, Therefore, when the remaining length of the bar 14 becomes less than a predetermined length, the entry side vice 22 and the feed vise 18 are integrated by the vise coupling device, and the entry side vice 22 sends the bar 14 as a feed vise. Function to send the bar 14 to the exit vise 24 , Rear end member of the bar 14 is reduced. In addition, since the input side vice 22 and the input vise 18 are integrated by the vice coupling device, the input side vice 22 is also driven by the feed device for the input vise 18 (18c: input vise actuator). There is an advantage that a feeding device dedicated to the entry side vice is not required and the bar cutting machine 10 is inexpensive. Furthermore, there is no need for the gripping member to protrude from the main vice for gripping the bar, and the minimum cutting length limit of the bar is suitably reduced.

  The vise coupling device includes a pair of gripping protrusions and gripping protrusions 18e and 18f that protrude from the feed fixing claw 18a and the feed movable claw 18b of the feed vise 18 to the entrance vise 22 side, and the entrance vise 22 respectively. Since it is simply configured from the pair of gripping projections and the gripped portion 22e gripped by the gripping projections 18e and 18f, there is an advantage that the bar cutting machine 10 is further inexpensive.

  Further, according to the bar cutting machine 10 of the present embodiment, even if the remaining length of the bar 14 is greater than or equal to a predetermined value, the bar 14 held by the feeding vise 18 or the entry side vice 22 Before the circular saw 20 rises to its original position after cutting, the bar 14 is pulled away from the circular saw 20 by a preset retracted dimension (retract dimension), so that the circular saw 20 rises to its original position. Interference with the bar 14 is prevented in the process.

  Further, according to the bar cutting machine 10 of the present embodiment, the feeding vise 18 can return to the next gripping position during cutting of the bar 14 gripped by the entry side vice 22 and the exit side vise 24. As a result, the lengthening of the cutting cycle is eliminated.

  The preferred embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, and may be implemented in other modes.

  For example, in the above-described embodiment, the circular saw 20 is used as the cutting tool. However, other types of cutting tools, for example, a rod-shaped gold saw having a straight sawtooth may be used.

  Further, the vise coupling device of the above-described embodiment includes a pair of gripping protrusions 18e and 18f that protrude from the feeding fixed claw 18a and the feeding movable claw 18b of the feeding vise 18 to the inlet side vice 22 side, and an inlet side vise. 22 and is simply configured from the gripped portion 22e gripped by the pair of gripping protrusions 18e and 18f, but may be another mechanism to which a gripping mechanism having an actuator is added independently. Alternatively, another type of coupling device using an electromagnet that is magnetically attracted instead of gripping with a vise may be used.

  In the above-described embodiment, the pneumatic glue clamper 28 is used to fix the entry side vice 22. However, a hydraulic or electromagnetic fixing device may be used.

  Although not exemplified one by one, the present invention is implemented with various modifications within the scope not departing from the gist thereof.

10: Bar cutting machine 14: Bar 18: Feeding vise 18a: Feeding fixed claw 18b: Feeding movable claw 18c: Feeding vise actuator 18e, 18f: A pair of gripping projections (vice coupling device)
20: Circular saw (cutting tool)
22: entry side vice 22a: entry side fixed claw 22b: entry side movable claw 22c: entry side vise actuator 22e: gripped portion (vise coupling device)
24: Outside vise 24a: Outgoing side fixed claw 24b: Outgoing side movable claw 24c: Outgoing side vise actuator 28: Clamper (fixing device)
A: Cutting position

Claims (3)

A feed vise that is driven to reciprocate along the longitudinal direction of the bar, feeds the bar toward the cutting position by a predetermined cutting length, and straddles the cutting position to hold the bar during cutting. A bar cutting machine provided with a main vice provided and a cutting tool provided so as to reciprocate toward the bar in order to cut the bar gripped by the main vice,
The main vise is located on the feeding vise side with respect to the cutting position, and is movable on the opposite side of the feeding vice with respect to the cutting position. A fixed position exit vise, and
When the remaining length of the bar is equal to or greater than a predetermined length, a fixing device that fixes the movement of the bar of the entry side vice in the longitudinal direction;
When the remaining length of the bar is less than a predetermined length, a vise that releases the fixing by the fixing device and connects the entry-side vise to the feeding vise and moves the entry-side vise together with the feeding vice. A coupling device ,
The feed vise includes a feed fixed claw and a feed movable claw provided so as to be close to and away from the feed fixed claw, and the feed movable claw is driven by a feed vise actuator. Configured to grip the bar with
The entry-side vise includes an entry-side fixed claw and an entry-side movable claw provided so as to be close to and away from the entry-side fixed claw, and the entry-side vise actuator drives the entry-side movable claw. Configured to grip the bar with
The vise coupling device includes a pair of gripping protrusions protruding from the input fixed claw and the input movable claw of the input vise to the input side vise side, and the pair of grip protrusions provided on the input side vise. And a gripped part gripped by
The gripped portion constitutes a receiving surface for receiving the bar material between the input side fixed claw and the input side movable claw of the input side vise, and is larger than the maximum dimension of the bar material in the gripped direction. A bar cutting machine characterized by having a large width dimension . 2. The bar cutting machine according to claim 1, wherein during the cutting of the bar gripped by the entry side vise and the exit side vise, the feeding vise is moved backward to replace the bar. . 2. The bar according to claim 1, wherein the bar held by the feeding vise or the entry side vice is pulled back by a predetermined dimension after the bar is cut and before the cutting tool is returned to the original position. Cutting machine.

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