JP3297557B2 - Cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting a workpiece by a saw blade (a band saw blade, a circular saw blade, etc.) after positioning the workpiece in a conveying direction so that the cut section of the work is located at a cutting position. The present invention relates to a cutting machine such as a band sawing machine and a circular sawing machine for cutting a part.

[0002]

2. Description of the Related Art A general band saw machine (an example of a cutting machine) will be briefly described. A general band saw machine is based on a box-shaped base. A saw blade housing with a band saw blade is provided so as to be able to move up and down. A main body vise device is provided at a position on the base, behind the cutting position as viewed from the conveyance direction and close to the cutting position, so as not to be movable in the conveyance direction, and the main body vise device is provided with a first clamp. A pair of main body vice jaws capable of clamping and unclamping a work by operating a cylinder is provided.

[0003] A support table is disposed in front of the cutting position when viewed from the transport direction, and a front vise device is provided on the support table so as to be able to reciprocate in the transport direction by operation of a transport cylinder. This front vise device includes a pair of front vice jaws capable of clamping and unclamping a work by operating a second clamp cylinder.

Accordingly, the work is positioned between the pair of front vice jaws and between the pair of main body vice jaws. Next, the work is clamped by the pair of front vice jaws. Then, by moving the front vise device in the transport direction by the operation of the transport cylinder and moving it away from the cutting position, the workpiece to be cut is transported and positioned at the cutting position.

In the case where the length of the workpiece is long, the workpiece is clamped by the pair of main body vice jaws after the front vise device is moved in the transport direction as described above. To the unclamped state. Next, the front vise device is moved backward in the direction opposite to the transport direction to approach the cutting position, and the work is clamped again by the pair of front vise jaws. Then, the pair of main body vice jaws are set to the unclamped state, the front vise device is moved forward in the transport direction, separated from the cutting position, and the cut portion of the work is positioned at the cutting position.

After the section to be cut of the work is transported and positioned at the cutting position, the work is clamped by the pair of main body vice jaws while being clamped by the pair of front vice jaws. Then, while the band saw blade is running, the saw blade housing is lowered to cut the workpiece to be cut.

[0007]

By the way, the front vise device is moved forward in the transport direction to move away from the cutting position, and the workpiece is transported and positioned so that the cut portion near the rear end of the workpiece is located at the cutting position. When doing, the work may not be located between the pair of main body vice jaws,
The work may not be clamped by the pair of main body vice jaws. In such a case, the cutting process must be performed in a state where the work is clamped only by the pair of front vice jaws.If the pair of front vice jaws is largely separated from the cutting position, the work is firmly secured at the time of cutting. Can not be fixed. For this reason, there has been a problem that the cutting accuracy of the work is deteriorated, and the band saw blade (saw blade) is chipped.

[0008]

In order to solve the above-mentioned conventional problems, in the present invention, as a first means, the work is moved in the transport direction so that the cut portion of the work is located at the cutting position. A cutting machine that performs a cutting process on a portion to be cut of a workpiece by a saw blade after the transfer position is determined, a first clamp is provided at a position behind the cutting position and close to the cutting position when viewed from the transfer direction. A first vice device (including a main body vise device) having a pair of first vice jaws capable of clamping and unclamping a work by an operating device is provided, and the first vise device is configured to be immovable in the transport direction; In front of the cutting position when viewed from the transport direction,
A second vise device (including a front vise device) having a pair of second vise jaws capable of clamping and unclamping a workpiece by a second clamp operating device is provided.
The vise device is configured to be able to reciprocate in the transport direction by the operation of the transport operation device, and detects that the rear end of the workpiece is located at a final clamp position that can be clamped by the pair of first vice jaws when the workpiece is transported. When a rear end of the work is detected to be located at the final clamp position by the work rear end detection device, the second vice device is temporarily stopped from moving forward in the conveyance direction, and the detection is performed in the conveyance direction. The transfer operation device is controlled so as to return in the opposite direction, and the pair of second vice jaws are unclamped after the second vice device stops the forward movement and before returning. A pair of first vise jaws are controlled after the second vice device stops the forward movement and before the pair of second vice jaws are unclamped, controlling the second clamp operating device. Wherein the chromatography so as to clamp the first
A control device for controlling the clamp operating device is provided.

As a second means, in addition to the constituent elements of the first means, the control device is controlled by the work rear end detection device to detect that the rear end of the work is located at the final clamp position. The second clamp actuating device can be controlled so as to temporarily stop the forward movement of the second vise device in the transport direction and return to the opposite direction of the transport direction, and then clamp the pair of second vise jaws. It is characterized by comprising.

[0010] As a third means, in addition to the constituent elements of the first or second means, the work trailing edge detecting device is provided with a carriage at the rear side of the cutting position in the transport direction so as to reciprocate in the transport direction as viewed from the transport direction. The carriage is provided with a support arm having a work holding portion for holding a rear end of the work, and a position detecting device for detecting a position of the work holding portion in the transport direction is provided.

As a fourth means, in addition to the constituent elements of the first to third means, the final clamp position is one of the first clamp positions.
It is characterized in that it is a position separated from the front end of the clamp surface of the vise jaw by a length corresponding to a minimum required clamp margin in a rearward direction when viewed from the transport direction.

[0012]

With the above arrangement, the second clamp operating device is operated in a state where the work is located between the pair of first vice jaws and between the pair of second vice jaws, and the pair of second vise jaws are operated. Clamp the work with the jaws. Then, the second vice device is moved forward in the transport direction by the operation of the transport operation device and moved away from the cutting position, whereby the workpiece is transported and positioned so that the cut portion of the workpiece is located at the cutting position.

When the transport length of the work is long, the work is clamped by the pair of first vise jaws after the second vice device is moved forward in the transfer direction as described above, and the pair of first vise jaws are clamped. The two vice jaws are unclamped. Next, the second vise device is moved backward in the direction opposite to the transport direction to approach the cutting position, and the workpiece is clamped again by the pair of second vice jaws. Then, the pair of first vice jaws are set to the unclamped state, the second vice device is moved forward in the transport direction, separated from the cutting position, and the cut portion of the work is positioned at the cutting position. If the transport length of the work is longer, the above operation is repeated.

After the portion to be cut of the work is transported and positioned at the cutting position, the work is clamped by the pair of first vise jaws while being clamped by the pair of second vice jaws, and the work is cut by the saw blade. A cutting process is performed on the cutting portion. Before cutting, a pair of second
The vise jaw may be unclamped, the second vice device may be moved back in the direction opposite to the transport direction to approach the cutting position, and clamped again by the pair of second vise jaws.

Under the above-described operation, the second vice device is moved forward in the transport direction so that the portion to be cut near the rear end of the workpiece is located at the cutting position, and the workpiece is being transported. When the rear end detecting device detects that the rear end of the work is located at the final clamp position, the following operation is performed. That is, the control device controls the transfer operation device to temporarily stop the second vise device from moving in the transfer direction, and controls the first clamp operation device to clamp the work with the pair of first vise jaws. At the same time, by controlling the second clamp operating device to unclamp the pair of second vice jaws, the first and second vise devices are clamped. Next, the transfer operation device is controlled to move the second vice device backward in the direction opposite to the transfer direction to once approach the cutting position. Further, the work is clamped by the pair of second vice jaws by controlling the second clamp operating device, and the pair of first vise jaws are unclamped by controlling the first clamp operating device. Then, the second vice device is moved forward in the transport direction by the transport operation device, and the workpiece is transported and positioned such that the cut portion near the rear end of the workpiece is at the cutting position. Finally, under the condition clamped by the pair of second vice jaws, a cutting process is performed on the cut portion near the rear end of the work by the saw blade.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to this embodiment will be described below with reference to the drawings.

Referring to FIG. 1, a band saw machine 1 according to the present embodiment is based on a box-shaped base 3 having a movable endless band saw blade 5. The blade housing 7 is provided so as to be able to move up and down. The band saw blade 5 can run by driving a saw blade motor (not shown), and the saw blade housing 7 can be moved up and down by operating a lifting cylinder (not shown).

The rear side of the cutting position on the base 3 (FIG. 1)
In the right side, the rear side of the cutting position when viewed from the conveying direction of the workpiece W such as an H-section steel), and at a position close to the cutting position, a main body vise device 9 is provided. Body vise head 11 fixed to 3
And a pair of main body vice jaws 13 and 1 provided on the main body vise head 11 so as to face left and right (up and down in FIG. 1).
5 is provided. In order to enable clamping and unclamping of the pair of main body vice jaws 13, 15, one main body vice jaw 13 can be moved in the left / right direction approaching and separating from the other main body vice jaw 15 by the operation of the first clamp cylinder 17. .

A front table 19 is located on the front side of the base 3 (the left side in FIG. 1, the front side of the cutting position when viewed from the transport direction).
The front table 19 has a large number of support rollers 21 that are rotatable in the front-rear direction. The front table 19 is provided with a front vise device 23. The front vise device 23 is provided on the front table 19 so as to be movable in the front-rear direction. Pair of front vice jaws 27 and 29 provided
It has. To reciprocate the front vice device 23 in the transport direction (forward direction), the front table 19
Piston rod 3 that can move in the front-rear direction
1 is provided, and this piston rod 35 is connected to the front vice head 25. In order to enable the pair of front vice jaws 27, 29 to be clamped and unclamped, one of the front vice jaws 27 can be moved in the left / right direction approaching and separating from the other front vice jaw 29 by the operation of the second clamp cylinder 35. .

A rear table 37 is provided on the rear side of the base 3. The rear table 37 has a plurality of transport rollers 39 rotatable in the transport direction (forward) by driving a transport motor (not shown). It has. Here, in the band saw machine 1 of the present embodiment, the work W
The transport of the work W is performed by rotating the plurality of transport rollers 39 in the transport direction until the support near the rear end of the work W is released. Then, as described later, the front vice device 2
The workpiece W is transported by reciprocating the workpiece 3 in the transport direction. In addition, even before the support of the vicinity of the rear end of the workpiece W by the plurality of transport rollers 39 is released, the plurality of transport rollers 39 are rotatable when the workpiece W is transported by the operation of the front vice device 23. Keep it.

In order to detect that the rear end of the work W is located at the final clamp position where the rear end of the work W can be clamped by the pair of main body vice jaws 13 and 15 due to the conveyance of the work W such as an H-section steel, the rear end of the rear table 37 is appropriately positioned. Is provided with a work rear end detection device 41.

More specifically, a guide rail 43 extending in the transport direction is provided on the right side of the support table 19.
A carriage 45 is provided on the guide rail 43 so as to freely reciprocate in the transport direction. The carriage 45 is provided with a support arm 47 extending in the transport direction. The support arm 47 has a work holding portion 49 for holding a rear end of the web of the work W. In order to detect the position of the work holding portion W in the transfer direction, in other words, the position of the rear end of the work W in the transfer direction, the rear table 37 has a rack 51 extending in the transfer direction parallel to the guide rail 43. The rack 45 is provided in the carriage 45 as well.
And a pinion 55 having an encoder 53 is provided. The encoder 53 is connected to a control device 57
Is electrically connected to the control device 57.
The clamp cylinder 17, the second clamp cylinder 35, and the transfer cylinder 33 are electrically connected. When the encoder 53 detects that the rear end of the workpiece W is located at the final clamp device by the encoder 53, the control device 57 temporarily stops the front vice device 23 from moving forward in the transport direction, and reverses the transport direction. In addition to controlling the transfer cylinder 33 so as to move backward, the pair of front vice jaws 27 and 29 are unclamped after the front vise device 23 stops the forward movement and before returning. The two clamp cylinders 35 are controlled, and the pair of main body vice jaws 13 and 15 are clamped after the front vise device 23 stops the forward movement and before the pair of front vise jaws 27 and 29 are unclamped. Next, the first clamp cylinder 17 is controlled.
Further, the control device 57 uses the encoder 53 to
After the rear end of the front vise is detected to be located at the final clamp position, the front vise device 23 is temporarily stopped from moving forward in the transport direction and is moved back in the opposite direction to the transport direction. The second clamp cylinder 35 is controlled so as to be clamped by the jaws 27 and 29.

Here, the final clamp position is separated from the front end of the one main body vice jaw 13 by a length corresponding to a minimum necessary clamp margin in a rearward direction when viewed from the transport direction, as viewed from the transport direction. Position.

The operation of this embodiment will be described based on the above-described configuration.

After the work W is supported on the rear table 37, a plurality of transport rollers 39 are driven by the drive of the transport motor.
Is rotated in the transport direction to transport the workpiece W in the transport direction. Thereby, the work W can be transported and positioned so that the cut portion of the work W is located at the cutting position. Before the transfer of the work W, the rear end of the work W is held by the work holding portion 49 of the work rear end detection device 41, so that the carriage 45 and the support arm 47 are moved during the transfer of the work W. It moves in the transport direction integrally with W.

After the portion to be cut of the work is transported and positioned at the cutting position, the first clamp cylinder 17 is operated to clamp a portion of the work W on the rear side of the cut position of the work W by the pair of main body vice jaws 13 and 15. Second
The clamp cylinder 35 is operated to clamp a portion of the work W in front of the cutting position by the pair of front vice jaws 27 and 29. Then, while the band saw blade 5 is running by driving the saw blade motor, the saw blade housing 7 is lowered by the operation of the lifting / lowering cylinder, so that the band saw blade 5 cuts the workpiece W to be cut. Perform processing. After cutting the portion to be cut of the work W, the main vise device 9 is unclamped and the front vise device 23 is unclamped.

By appropriately repeating the above-described operation, it is possible to perform a cutting process on another appropriate number of cut portions of the work W.

After the workpiece W is moved in the transport direction by the above-described operation and the support of the plurality of transport rollers 39 near the rear end of the workpiece W is released, in other words, the transport rollers 39 are released.
After the work W can no longer be conveyed, the work W is conveyed by the operation of the front vise device 23 as described below.

That is, the work W is placed between the pair of main body vice jaws 13 and 15 and between the pair of front vice jaws 27 and 15.
The work W is clamped by the pair of front vice jaws 27 and 29 under the state located between the two. Then, by operating the transfer cylinder 33 to move the front vice device 23 in the transfer direction to move the front vise device 23 away from the cutting position, the work W is transferred and positioned so that an appropriate cut portion of the work W is located at the cutting position. .

Further, instead of making the transport roller 39 rotatable by the transport motor as described above, the transport length of the work W by the front vise device 23 is long because the transport roller 39 is rotatable. In this case, the work W is clamped by the pair of main body vice jaws 13 and 15 after the front vise device 23 is moved in the transport direction, and the pair of front vice jaws 27 and 29 are moved.
To the unclamped state. Next, the front vise device 23 is moved backward in the direction opposite to the conveyance direction by the operation of the conveyance cylinder 33 to approach the cutting position, and the work W is clamped again by the pair of front vice jaws 27 and 29. Then, the pair of main body vice jaws 13 and 15 are set in an unclamped state, and the operation of the transfer cylinder 33 causes the front vice device 27 to move forward in the transfer direction so as to be separated from the cutting position. Position. When the transport length of the work W is longer, the above operation is repeated.

After the appropriate cut portion of the work W is transported and positioned at the cutting position, the work W is clamped by the pair of front vice jaws 27 and 29 and the work W is clamped by the pair of body vice jaws 13 and 15.
Is clamped on the part behind the cutting position in. Then, while the band saw blade 5 is running, the saw blade housing 7 is lowered, so that the band S blade 5 cuts the cut portion of the workpiece W. Before performing the cutting process, the pair of front vice jaws 27 and 29 are unclamped, the front vise device 23 is moved back in the opposite direction to the conveyance direction to approach the cutting position, and the pair of front vise is again formed. It may be clamped by the jaws 27 and 29.

Under the above-mentioned operation, the front vise device 23 is moved forward in the conveying direction so that the portion to be cut near the rear end of the work W is located at the cutting position. When the encoder 57 in the work rear end detection device 41 detects that the rear end of the work W is located at the final clamp position, the following operation is performed. That is, the control device 57 controls the transfer cylinder 33 to temporarily stop the front vise device 23 from moving forward in the transfer direction, and controls the first clamp cylinder 17 to control the work by the pair of body vice jaws 13 and 15. By clamping W and controlling the second clamp cylinder 35 to unclamp the pair of front vice jaws 27, 29, the main body and the front vise devices 9, 23 are clamped. Next, the transport cylinder 33 is controlled to move the front vise device 23 backward in a direction opposite to the transport direction by a length obtained by subtracting the final transport length from the length from the cutting position to the housing interference avoidance position, and once cut. Move closer to the position. Further, the work W is clamped by the pair of front vice jaws 27 and 29 by controlling the second clamp cylinder 35, and the pair of main body vice jaws 13 and 15 are controlled by controlling the first clamp cylinder 17. Then, the transport cylinder 33 moves the front vise device 23 forward in the transport direction by the final transport length, and transports and positions the workpiece W such that the cut portion near the rear end of the workpiece W is cut. At this time, the front vise device 23 is located at the housing interference avoiding position. Finally, under the condition clamped by the pair of front vice jaws 27 and 29, the band S saw blade 5 cuts the cut portion near the rear end of the work W as described above. Here, the housing interference avoiding position means a position where the saw blade housing 7 does not interfere with the saw blade housing 7 when the saw blade housing 7 descends, and means a position closest to the cutting position.

As described above, according to the invention of this embodiment,
When the rear end of the work W is located at the final clamp position by the conveyance by the front vise device 23, the main body and the front vise devices 9 and 23 are clamped, the front vise device 23 is once approached to the cutting position, and the front vise is again performed. Since the work W is clamped by the device 23, the front vise device 23 does not largely separate from the cutting position even when the cut portion near the rear end of the work W is positioned at the cutting position. Therefore, even when the work W is clamped only by the front vise device 23, the work W can be strengthened at the time of cutting the portion to be cut near the rear end of the work W, and the cutting accuracy of the work W can be improved. Of the skirt blade 5 can be avoided.

[0034]

As will be understood from the details of the embodiment as described above, according to the present invention, when the rear end of the work is located at the final clamping position by the transfer by the second vise device, the first and second vise are provided. Since the clamp of the device was changed, the second vice device was once approached to the cutting position, and the work was clamped again by the second vise device. Therefore, the cut portion near the rear end of the work was positioned at the cutting position. Even in this case, the second vice device does not largely separate from the cutting position. Therefore, even when the work is clamped only by the second vise device, the work can be strengthened at the time of cutting the portion to be cut near the rear end of the work, and the cutting accuracy of the work deteriorates and Chipping of the blade can be avoided.

[Brief description of the drawings]

FIG. 1 is a plan view of a band saw machine according to the present embodiment.

FIG. 2 is a control block diagram of the present embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 band sawing machine 5 band saw blade 9 main body vice device 13.15 main body vice jaw 17 first clamp cylinder 23 front vise device 27.29 front vise jaw 33 transfer cylinder 35 second clamp cylinder 41 work rear end detection device 45 carriage 49 work holding Part 53 enender 57 controller

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23D 55/04 B23D 47/04 B27B 29/00

Claims (4)

(57) [Claims] 1. A cutting machine for performing a cutting process on a workpiece to be cut by a saw blade after the workpiece is transported and positioned in a transport direction so that the workpiece to be cut is positioned at a cutting position. A first vise device having a pair of first vice jaws capable of clamping and unclamping a work by a first clamp operating device is provided at a position behind and close to the cutting position when viewed from the viewpoint. A second vise jaw, wherein the first vice device is configured to be immovable in the transport direction, and a pair of second vise jaws capable of clamping and unclamping a workpiece by a second clamp operating device is provided in front of the cutting position when viewed from the transport direction. A vise device is provided, and the second vise device is configured to be reciprocable in the transport direction by the operation of the transport operation device. A work rear end detection device is provided for detecting that the work is located at a final clamp position that can be clamped by the jaw. When the work rear end detection device detects that the work rear end is located at the final clamp position, the second position is detected. The vice device temporarily stops the forward movement in the transport direction and controls the transport operation device so as to return in the opposite direction to the transport direction, and after the second vise device stops the forward travel, Controlling the second clamp operating device to unclaminate the pair of second vice jaws before returning.
And a control device for controlling the first clamp operating device so as to clamp the pair of first vise jaws after the second vice device stops the forward movement and before the pair of second vise jaws are unclamped. A cutting machine characterized by comprising: 2. The control device according to claim 1, wherein the work rear end detection device detects that the rear end of the work is located at the final clamp position, and temporarily stops the second vice device from moving forward in the transport direction. The second clamp operating device is configured to be controllable so as to be clamped by the pair of second vice jaws after at least returning in the opposite direction to the transport direction. Cutting machine. 3. The work trailing end detection device includes a work holding portion that holds a rear end of a work at a rear side of a cutting position as viewed in the carrying direction, the carriage being reciprocally movable in the carrying direction. The cutting machine according to claim 1, further comprising a support arm, and a position detection device that detects a position of the work holding unit in the transport direction. 4. The first clamp position is one of the first clamp positions.
The vise jaw according to claim 1, wherein the clamp surface is located at a position separated from a front end of the clamp surface in a conveying direction by a length corresponding to a minimum required clamp margin in a rearward direction when viewed from the conveying direction. The cutting machine described.