JPH08229734A - Cutting machine - Google Patents

Abstract

PURPOSE: To firmly clamp a workpiece, at the time of cutting a cut part in the vicinity of a rear end of the workpiece. CONSTITUTION: When positioning a rear end of a workpiece in a final clamp position is detected by a workpiece rear end detecting device 41, forwardly moving the second vice device 23 in a conveying direction is once stopped so as to perform backward moving in an opposite direction to the conveying direction, also so as to unclamp a pair of the second vice jaws 27, 29 after forwardly moving the second vice device 23 is stopped and before backward moving is performed. After forwardly moving the second vice device 23 is stopped and before a pair of the second vice jaws 27, 29 are unclamped, a pair of the first vice jaws 13, 15 are made so as to be clamped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to cut a work piece with a saw blade (band saw blade, circular saw blade, etc.) after positioning the work piece in the conveying direction so that the cut portion of the work piece is located at the cutting position. The present invention relates to a cutting machine such as a band saw machine and a circular saw machine that cuts 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, and the base has a movable endless shape. A saw blade housing provided with a band saw blade is provided so as to be able to move up and down. A main body vise device is provided immovably in the transfer direction at a position behind the cutting position in the base as viewed from the transfer direction and close to the cutting position, and the main body vise device is the first clamp. It is equipped with a pair of body vice jaws that can clamp and unclamp a work by operating the cylinder.

A supporting table is arranged on the front side of the cutting position when viewed from the carrying direction, and a front vise device is provided on the supporting table so as to be reciprocable in the carrying direction by the operation of the carrying cylinder. This front vise device is provided with a pair of front vise jaws capable of clamping and unclamping a work by the operation of the second clamp cylinder.

Therefore, the work is positioned between the pair of front vise jaws and between the pair of main body vise jaws. Next, the work is clamped by the pair of front vise jaws. Then, by operating the transport cylinder, the front vise device is moved in the transport direction to move away from the cutting position, whereby the portion to be cut of the workpiece is transported and positioned to the cutting position.

Here, in the case where the work transfer length is long, after the front vise device is moved forward in the transfer direction as described above, the work is clamped by the pair of main body vise jaws, and the pair of front vise jaws is clamped. To the unclamped state. Next, the front vise device is moved back in the direction opposite to the conveying 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 vise jaws is set in an unclamped state, the front vise device is moved forward in the transport direction to be separated from the cutting position, and the cut portion of the work is positioned in the cutting position.

After the portion to be cut of the work is conveyed 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 perform the cutting process on the portion to be cut of the work.

[0007]

By the way, the front vise device is moved forward in the conveying direction to separate from the cutting position, and the work is conveyed and positioned so that the portion to be cut near the rear end of the work is located at the cutting position. When you do, the work may not be located between the pair of body vice jaws,
The work may not be clamped by the pair of body vice jaws. In such a case, it is necessary to cut the work while clamping the work with only a pair of front vise jaws.If the pair of front vise jaws are largely separated from the cutting position, the work will be firm when cutting. Can not be fixed to. Therefore, there is a problem that the cutting accuracy of the work is deteriorated and the tooth of the band saw blade (saw blade) is chipped.

[0008]

In order to solve the problems of the prior art as described above, in the present invention, as a first means, the work is conveyed in the conveying direction so that the cut portion of the work is located at the cutting position. In a cutting machine that performs a cutting process on a portion to be cut of a work by a saw blade after carrying and positioning the first clamp at a position behind the cutting position as viewed from the carrying direction and close to the cutting position. A first vice device (including a main body vice device) provided with a pair of first vice jaws capable of clamping and unclamping a work by an operating device is provided, and the first vice device is configured to be immovable in the transport direction, and 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 work by the second clamp actuating device is provided.
A work rear end configured to reciprocate in the transfer direction by the operation of the transfer operation device, and detects that the rear end of the work is positioned at the final clamp position where it can be clamped by the pair of first vise jaws by the transfer of the work. A detection device is provided, and when the work rear end detection device detects that the rear end of the work is located at the final clamp position, the second vise device is temporarily stopped from moving in the conveyance direction, and the second vise device is stopped. The conveyance actuating device is controlled so as to return in the opposite direction, and the pair of second vise jaws are unclamped after the second vice device has stopped the forward movement and before returning. A pair of first vise jaws controlling the second clamp actuating device and after the second vise device has stopped the forward movement and before unclamping the pair of second vise jaws. 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 features of the first means, the control device detects that the rear end of the work is located at the final clamp position by the work rear end detection device, It is possible to control the second clamp actuating device so that the second vise device is temporarily stopped from moving in the carrying direction and is returned to the opposite direction to the carrying direction, and then clamped by the pair of second vise jaws. It is characterized in that it is configured.

As a third means, in addition to the constituent requirements of the first or second means, the work trailing edge detecting device is provided with a carriage reciprocally in the carrying direction behind the cutting position when viewed from the carrying direction. The carriage is provided with a support arm having a work holding portion for holding the rear end of the work, and a position detecting device for detecting the position of the work holding portion in the transport direction.

As a fourth means, in addition to the constitutional requirements of the first to third means, the final clamp position is the first one on the one hand.
It is characterized in that it is a position separated from the front end of the clamp surface of the vise jaw in the transport direction by a length corresponding to the minimum required clamping margin in the rear direction in the transport direction.

[0012]

With the above construction, the second clamp actuating device is operated under the condition that the work is positioned between the pair of first vise jaws and between the pair of second vise jaws, and the pair of second vise jaws is operated. Clamp the workpiece with the jaws. Then, by moving the second vise device in the carrying direction by the operation of the carrying operation device and moving it away from the cutting position, the work is carried and positioned so that the cut portion of the work is located at the cutting position.

Here, when the work is conveyed for a long length, the work is clamped by the pair of first vise jaws after the second vise device is moved forward in the conveying direction as described above, and the pair of first vise jaws is clamped. 2 Unclamp the vice jaw. Next, the second vise device is moved back in the direction opposite to the conveying direction to approach the cutting position, and the work is clamped again by the pair of second vise jaws. Then, the pair of first vise jaws are set to the unclamped state, the second vise device is moved in the transport direction to be separated from the cutting position, and the cut portion of the work is positioned to the cutting position. In addition, when the conveyance length of the work is further longer, the above-described operation is repeated.

After the portion to be cut of the work is conveyed to the cutting position and positioned, the work is clamped by the pair of first vice jaws while being clamped by the pair of second vice jaws, and the work is cut by the saw blade. The cutting process is performed on the cutting portion. In addition, before performing the cutting process, a pair of second
It is also possible to unclamp the vise jaws, move the second vise device back in the direction opposite to the transport direction to bring it closer to the cutting position, and then clamp it again with the pair of second vise jaws.

Under the above-described operation, while the work is being conveyed by moving the second vise device in the conveying direction so that the portion to be cut near the rear end of the work is located at the cutting position, When the trailing edge detection device detects that the trailing edge of the work is located at the final clamp position, the following action 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 by the pair of first vise jaws. At the same time, the second clamp actuating device is controlled to unclamp the pair of second vise jaws, whereby the clamps of the first and second vise devices are changed. Next, the transfer operation device is controlled to move the second vise device back in the direction opposite to the transfer direction to once approach the cutting position. Further, the second clamp actuating device is controlled to clamp the work by the pair of second vise jaws, and the first clamp actuating device is controlled to unclamp the pair of first vise jaws. Then, the second vice device is moved forward in the carrying direction by the carrying operation device, and the work is carried and positioned so that the portion to be cut near the rear end of the work is at the cutting position. Finally, under the state of being clamped by the pair of second vise jaws, a saw blade cuts a portion to be cut near the rear end of the work.

[0016]

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 this embodiment is based on a box-shaped base 3, and the base 3 is provided with a saw having an endless band saw blade 5 capable of running. A blade housing 7 is provided so that it can be raised and lowered. The band saw blade 5 can be driven by driving a saw blade motor (not shown), and the saw blade housing 7 can be raised and lowered by the operation of an elevator cylinder (not shown).

Behind the cutting position on the base 3 (see FIG. 1).
On the right side, the rear side of the cutting position when viewed from the conveying direction of the work W such as H-shaped steel) and the position close to the cutting position, a main body vice device 9 is provided. Body vice head 11 fixed to 3
And a pair of main body vice jaws 13 and 1 provided on the main body vice head 11 so as to face each other in the left-right direction (up and down in FIG. 1)
5 is provided. Since the pair of main body vice jaws 13 and 15 can be clamped and unclamped, one main body vice jaw 13 is movable in the left-right direction by 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 provided 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 conveying direction).
The front table 19 is provided with a large number of support rollers 21 rotatable in the front-back direction. The front table 19 is provided with a front vise device 23. The front vise device 23 is provided with a front vise head 25 provided on the front table 19 so as to be movable in the front-rear direction, and faces the front vise head 25 left and right. A pair of front vice jaws 27, 29
It has. In order to reciprocate the front vise device 23 in the carrying direction (forward direction), the front table 19
Piston rod 3 that can move in the front-back direction at an appropriate position
1 is provided with a transfer cylinder 33, and this piston rod 35 is connected to the front vise head 25. Since the pair of front vise jaws 27, 29 can be clamped / unclamped, one front vise jaw 27 is movable by the operation of the second clamp cylinder 35 in the left-right direction in which the front vise jaw 27 approaches and separates from the other front vise jaw 29. .

A rear table 37 is provided on the rear side of the base 3, and the rear table 37 is provided with a plurality of conveying rollers 39 which are rotatable in a conveying direction (forward direction) by driving a conveying motor (not shown). Is equipped with. Here, in the band saw machine 1 of the present embodiment, the work W by the transport roller 39 is used.
The workpiece W is transported 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, and the support near the rear end of the work W by the transport roller 39 is released. After that, as described later, the front vise device 2
The work W is transported by reciprocally moving 3 in the transport direction. In addition, even before the support of the vicinity of the rear end of the work W by the plurality of transfer rollers 39 is released, when the work W is transferred by the action of the front vise device 23, the plurality of transfer rollers 39 are configured to be rotatable. I'll do it.

Since it is detected 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 by the conveyance of the work W such as H-section steel, 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 carrying 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 reciprocate in the carrying direction. The carriage 45 is provided with a support arm 47 extending in the carrying direction, and the support arm 47 is provided with a work holding portion 49 that holds the rear end of the web of the work W. In order to detect the position of the work holding part W in the carrying direction, in other words, the position of the rear end of the work W in the carrying direction, a rack 51 extending in the carrying direction is arranged parallel to the guide rail 43 on the rear table 37. This rack 51 is installed on the carriage 45.
There is provided a pinion 55 which meshes with and has an encoder 53. The encoder 53 is the controller 57.
Is electrically connected to
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 work W is located at the final clamping device, the control device 57 temporarily stops the forward movement of the front vise device 23 in the carrying direction, and reverses the carrying direction. The transfer cylinder 33 is controlled so as to return in the same direction, and the front vice device 23 unclamps the pair of front vise jaws 27, 29 after stopping the forward movement and before returning. 2 to control the clamp cylinder 35 and clamp the pair of main body vise jaws 13 and 15 after the front vise device 23 has stopped the forward movement and before unclamping the pair of front vise jaws 27 and 29. In addition, the first clamp cylinder 17 is controlled.
Further, the control device 57 uses the encoder 53 to work W.
When the rear end of the front vise is detected to be in the final clamp position, the forward movement of the front vise device 23 is temporarily stopped, and the front vise device 23 is returned in the opposite direction to the conveying 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 clamp surface of one of the main body vice jaws 13 when viewed from the transport direction, and from the front end when viewed from the transport direction by a length corresponding to a minimum required clamping margin. Position

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

After the work W is supported on the rear table 37, a plurality of transport rollers 39 are driven by driving the transport motor.
Is rotated in the carrying direction to carry the work W in the carrying direction. Thereby, the work W can be conveyed and positioned so that the portion to be cut of the work W is located at the cutting position. Since the rear end of the work W is held by the work holding portion 49 of the work rear end detection device 41 before the work W is conveyed, the carriage 45 and the support arm 47 are not moved during the conveyance of the work W. It moves in the transport direction integrally with W.

After the portion to be cut of the work is conveyed and positioned to the cutting position, the first clamp cylinder 17 is actuated to clamp the portion of the work W on the rear side of the cutting position, by the pair of main body vice jaws 13 and 15. Second
The clamp cylinder 35 is operated to clamp the front part of the work W, which is located in front of the cutting position, by the pair of front vise jaws 27, 29. Then, while the band saw blade 5 is being driven by the drive of the saw blade motor, the saw blade housing 7 is lowered by the operation of the lifting cylinder, so that the band saw blade 5 cuts the workpiece W to be cut. Perform processing. After cutting the cut portion of the work W, the main body 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 cutting work on another appropriate number of cut portions of the work W.

After the work W is moved in the carrying direction by the above-mentioned action, the support near the rear end of the work W by the plurality of carrying rollers 39 is released, in other words, the carrying roller 39.
After the work W cannot be conveyed by the above, the work W is conveyed by the action of the front vise device 23 as follows.

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

Further, the conveyance length of the work W by the front vise device 23 is long because the conveyance roller 39 is rotatable instead of the constitution in which the conveyance roller 39 is rotatable by the conveyance motor as described above. In this case, the work W is clamped by the pair of main body vise jaws 13 and 15 after the front vise device 23 is moved in the transport direction, and the pair of front vise jaws 27 and 29 is used.
To the unclamped state. Next, by operating the transfer cylinder 33, the front vise device 23 is moved back in the direction opposite to the transfer direction to approach the cutting position, and the work W is clamped again by the pair of front vise jaws 27 and 29. Then, the pair of main body vise jaws 13 and 15 are unclamped, and the front end vise device 27 is moved forward in the transport direction by the operation of the transport cylinder 33 to separate to the cutting position, and the portion to be cut of the work W is cut to the cutting position. Position it. In addition, when the conveyance length of the work W is further long, the above-mentioned operation is repeated.

After transporting and positioning an appropriate portion to be cut of the work W to the cutting position, the work W is clamped by the pair of front vise jaws 27 and 29, and the work W is clamped by the pair of main body vise jaws 13 and 15.
Clamp the part behind the cutting position at. Then, while the band saw blade 5 is running, the saw blade housing 7 is lowered to cut the portion to be cut of the work W by the band saw blade 5. Before performing the cutting process, the pair of front vise jaws 27, 29 is unclamped, the front vise device 23 is returned in the opposite direction to the conveying direction to approach the cutting position, and the pair of front vise again. It may be clamped by the jaws 27 and 29.

Under the above-mentioned operation, the front vice device 23 is moved in the carrying direction so that the portion to be cut near the rear end of the work W is located at the cutting position, and the work W is being carried. When the rear end of the work W is detected to be located at the final clamp position by the encoder 57 of the work rear end detection device 41, the following operation is performed. That is, the control device 57 controls the transfer cylinder 33 to temporarily stop the forward movement of the front vise device 23 in the transfer direction, and controls the first clamp cylinder 17 to control the work by the pair of main body vice jaws 13 and 15. By clamping W and controlling the second clamp cylinder 35 to unclamp the pair of front vise jaws 27, 29, the main body and the front vise devices 9, 23 are clamp-replaced. Next, the conveyance cylinder 33 is controlled to move the front vise device 23 back in the opposite direction to the conveyance direction by a length obtained by subtracting the final conveyance length from the length from the cutting position to the housing interference avoidance position, and once cutting is performed. Move closer to the position. Further, the second clamp cylinder 35 is controlled to clamp the work W by the pair of front vice jaws 27 and 29, and the first clamp cylinder 17 is controlled to unclamp the pair of main body vice jaws 13 and 15. Then, the front vise device 23 is moved forward in the transport direction by the transport cylinder 33 by the final transport length, and the workpiece W is transported and positioned so that the portion to be cut near the rear end of the workpiece W is located at the cutting position. At this time, the front vise device 23 is located at the housing interference avoidance position. Finally, under the state of being clamped by the pair of front vise jaws 27, 29, the band saw blade 5 cuts the portion to be cut near the rear end of the work W as described above. Here, the housing interference avoidance position means a position which does not interfere with the saw blade housing 7 when the saw blade housing 7 descends, and is a position which is 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 clamp-changed so that the front vise device 23 is once brought close to the cutting position, and then the front vise device is again opened. Since the work W is clamped by the device 23, the front vise device 23 is not largely separated from the cutting position even when the portion to be cut 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 when cutting the portion to be cut near the rear end of the work W, and the cutting accuracy of the work W is improved. It is possible to avoid the deterioration of the tooth and the lack of teeth of the belt-hem blade 5.

[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 clamp position by the conveyance by the second vice device, the first and second vices are arranged. The device is clamp-replaced to bring the second vise device closer to the cutting position once, and the work is clamped again by the second vise device. Therefore, the portion to be cut near the rear end of the work is located at the cutting position. Even in such a case, the second vise device is not largely separated 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, which deteriorates the cutting accuracy of the work and the saw. It is possible to avoid chipping of the blade teeth.

[Brief description of drawings]

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

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

[Explanation of symbols]

 1 Band saw machine 5 Band saw blade 9 Main body vise device 13.15 Main body vise 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 Enader 57 Control device

Claims (4)

[Claims] 1. A cutting machine for performing a cutting process on a portion to be cut of a workpiece by a saw blade after the workpiece is conveyed and positioned in the conveying direction so that the portion to be cut of the workpiece is located at a cutting position, A first vise device provided with a pair of first vise jaws capable of clamping and unclamping a work by the first clamp actuating device is provided at a position rearward of the cutting position and close to the cutting position when viewed from above. A second vise jaw in which the first vise device is configured to be immovable in the carrying direction, and a pair of second vise jaws capable of clamping and unclamping the work by the second clamp actuating device are provided on the front side of the cutting position when viewed from the carrying direction. A vice device is provided, and the second vice device is configured to be capable of reciprocating in the carrying direction by the operation of the carrying operation device. A work rear end detection device that detects that the jaw is located at the final clamp position where clamping is possible is provided. When the work rear end detection device detects that the rear end of the work is located at the final clamp position, the second After stopping the forward movement of the vise device in the transport direction and controlling the transport operation device so as to return in the opposite direction to the transport direction, and after the second vise device has stopped the forward motion, Controlling the second clamp actuator to unclamp the pair of second vice jaws before returning.
And a controller for controlling the first clamp actuating device so as to clamp the pair of first vice jaws after the second vice device has stopped its forward movement and before unclamping the pair of second vice jaws. A cutting machine characterized by being provided with. 2. The control device temporarily stops the forward movement of the second vise device in the carrying direction when the work trailing end detection device detects that the trailing end of the work is located at the final clamp position. The second clamp actuating device is configured to be controllable so as to be clamped by the pair of second vice jaws after being returned to the opposite direction to the conveying direction at least. Cutting machine. 3. The work trailing edge detection device includes a work holding portion for holding a trailing end portion of the work on the carriage, the carriage being provided at the rear side of the cutting position so as to be reciprocally movable in the carrying direction when viewed from the carrying direction. The cutting machine according to claim 1 or 2, further comprising a support arm and a position detection device for detecting a position of the work holding portion in the transport direction. 4. The final clamp position is the first clamp position on one side.
It is a position away from the front end of the clamping surface of the vise jaw when viewed from the carrying direction, and is a position away from the front end when viewed from the carrying direction by a length corresponding to a minimum required clamping margin. Cutting machine described.