JPH02212017A - Cutting method and device thereof - Google Patents

Abstract

PURPOSE:To improve the product accuracy after tip-cutting when a work is sawed by a horizontal saw machine by positioning the end part of the work clamped by a feed vise using a stopper member, automatically feeding the work a length required to be cut from a zero position, and then cutting the work. CONSTITUTION:When a work is clamped and fed by a feed vise 9, and cut by a cutting-machining unit 3 of a cutting machine 1, the end part of the work collides with a stopper member (stopper plate) 31. The colliding position is a zero position, from which the work is fed, and from the zero position the work is automatically fed a length required to be cut to the cutting-machining unit 3 side. When the feed vise 9 is moved in right direction, a pinion 21 is engaged with a rack 25 to be rotated. The rotating speed of the pinion 21 is detected by an encoder 23, and the travel of the feed vise 9 is measured and sent to NC device 29. On a command from the NC device, the feed device 9 is moved in right direction, and the work is out to a desired length by a cutting device BS.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention provides a cutting method for automatically positioning the end of the workpiece and cutting the workpiece when cutting the workpiece with a cutting machine. Regarding the device.

(Prior Art) Conventionally, when cutting a workpiece with a cutting machine, it is necessary to position the end of the workpiece. Various positioning means have been known as methods for positioning the ends of the workpiece.

That is, for example, (A) a method of positioning by measuring the tip of the workpiece from the position of the saw blade with a steel ruler.

<8> A method of positioning by providing a sizing stopper on the side to be cut and abutting the end of the work against this sizing stopper. (
C) A method of positioning by applying a trimming roller to the side of the workpiece and measuring the travel distance of the workpiece. (D) A method in which photoelectric switches are provided on both sides of the workpiece in a direction perpendicular to the direction in which the workpiece is transported to measure and position the workpiece. and (E) a method in which a separate material feeding device is provided at the rear of the cutting machine, the workpiece is sent by this material feeding device, hits a feeding vise, for example, and this position is set as the origin position, and the workpiece is fed by a feeding vise for positioning. .

(Problems to be Solved by the Invention) By the way, among the above-mentioned conventional techniques, in method (A), measurement is performed with the naked eye of the operator, so it must be carried out taking into consideration cutting allowance correction, etc. Sometimes it ended up being too long for its dimensions, and sometimes it ended up being too short, making it difficult to always ensure accurate positioning.

In the method (B), as in the method (A), the scale is adjusted by looking at the scale, so there is an error, and in order to feed the workpiece, an operation must be performed to release the workpiece from the sizing stopper. In the method (C), since the trimming roller is applied to the side surface of the workpiece, it may slip between the roller and the workpiece, or the workpiece may be deformed, making it difficult to obtain accurate dimensions.

In addition, in method (D), the workpiece is blocked from light while being pushed or pulled, so measurement errors occur due to the influence of cutting oil and dust adhering to the measurement surface of the workpiece, making it difficult to obtain accurate dimensions. That's funny. Furthermore, in the method (E), a separate material feeding device is provided in addition to the cutting machine main body, and the material feeding device is brought into contact with the workpiece to grip it, which causes a dimensional error when gripping the workpiece.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cutting method and apparatus for improving the precision of tip-cut products by accurately and automatically positioning the end of a workpiece, in order to improve the above-mentioned problems.

[Structure of the Invention] (Means for Solving the 12 Problems) In order to achieve the above object, the present invention provides a method for cutting a workpiece to be cut, which is clamped in a feed vise and fed, in a cutting section of a cutting machine. When cutting, the end of the workpiece is brought into contact with a stopper member, and the abutting position is set as an origin position for feeding the workpiece, and the material is automatically fed by a preset cutting length from this origin position. This is a cutting method in which the end of the workpiece is positioned and then cut.

The present invention also provides a movable feeding vise that clamps and feeds the workpiece, a stopper member ζ that serves as the origin position when positioning the end of the workpiece by abutting against it, and a cutting process from the stopper member. The cutting device is equipped with a measuring means for automatically feeding the workpiece by the cutting length to be cut at the section and measuring the end position of the workpiece.

(Function) By employing the cutting method and device of the present invention, the workpiece to be cut is clamped by the feed vise and then fed to the cutting section.

At this time, the end of the workpiece hits the stopper member,
This end position of the abutted workpiece is defined as the origin position.

The workpiece is fed from this origin position to the cutting section using a vise, and after being detected by a measuring means, the workpiece is accurately cut to a desired cutting length by a cutting machine.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIGS. 1 and 2, in a cutting section 3 of a horizontal band saw machine 1 as a cutting machine, for example, an endless band saw blade B is movable in a direction perpendicular to the paper plane in FIG. It is also provided so as to be movable up and down. The specific structure of the band saw blade B, which is freely movable and movable up and down, is already known and will not be described in detail.

On the front side (on the right side in Figs. 1 and 2) of the cutting device @Bs (the position where the center of the band saw blade B moves up and down) of the cutting section 3, there is a product holder 5 for receiving the cut product from the workpiece W.
is installed. In addition, the cutting position NBS of the cutting part 3
The dominant side (Fig. 1).

On the left side in Fig. 2, there is provided a body vise 7 that clamps the workpiece W when cutting it, and on the rear side of this body vice 7, the workpiece W is clamped and the workpiece W is moved in the front-rear direction (Fig. 1). A feeding vise 9 is provided for feeding the material in the horizontal direction in FIG. 2).

The main body vice 7 is composed of a fixed vice 7F and a moving vice 7M. In FIG. 1, the fixed vice 7F is provided on the upper side, the moving vice 7M is provided on the lower side, and the moving vice 7M is provided on the lower side in FIG. The main body vice cylinder 7S
is provided.

With the above configuration, when the workpiece W is fed to the main body vise 7, the moving vise 7M is moved from the lower side to the upper side in FIG. and a moving vise 7M. To unclamp the workpiece W from the main body vise 7, use the main body vise cylinder 7.
It is unclamped by moving the moving vice 7M downward in FIG. 1 by S.

The feeding vise 9 is composed of a fixed vise 9F and a moving vise 9M, and in FIG. 1, the fixed vise 9F is provided on the upper side and the moving vise 9M is provided on the lower side. A feed vice cylinder 9S is provided on the lower side. Further, a feed cylinder 13 is provided on the left side of the base 11 in the feed vise 9.

With the above configuration, when the workpiece W is placed on the pace 11 between the stationary vise 9F and the movable vise 9M using a crane or the like as shown in FIG. In FIG. 1, the workpiece W is moved from the lower side to the upper side and is clamped by a fixed vise 9F and a moving vise 9M.

Furthermore, by operating the feed cylinder 13 with the work W clamped by the fixed vise 9F and the moving vise 9M, the feed vise 9 is moved in the left-right direction in FIG. 1, so the work W is also moved in the same direction. That will happen.

A bracket 15 is integrated on the left side of the fixed vise 9F of the feed vise 9 in FIG. 1, and a support block 19 is attached to this bracket 15 with a pin 17. This support block 19 has a pinion 21
is rotatably supported, and this pinion 21 is equipped with an encoder 23 that detects the rotation of this pinion 21.

A rack 25 meshed with the pinion 21 extends in the left-right direction in FIG. 1, and both sides of the rack 25 are supported by support blocks 27. Moreover, the encoder 23 is a horizontal band saw! ! ! Horizontal belt IW equipped with 1
1 Connected to C41i129.

With the above configuration, when the feed vise 9 is moved in the left-right direction in FIG. 1, the pinion 21 is engaged with the rack 25, so that it is rotated. At this time, the rotation speed of the nion 21 is detected by the encoder 23, and the moving distance of the feed vise 9 is measured and transferred to the NC device 29.

For example, a stopper plate 31 as a stopper member is provided on the moving vice 9M side (the left side wall in FIG. 1) of the main body vice 5, and the main vice 5 is provided with a stopper plate 31 for detecting the front end position of the feed vice 9. A forward end limit switch 33 is provided.

A hydraulic circuit 35 for moving the feed vise 9 in the left-right direction in FIG. 2 is shown in FIG. That is, in FIG. 2, the front cylinder chamber 37 and rear cylinder chamber 339 of the feed cylinder 13 are provided with piping 41.
One end of 43 is connected. The other end of the pipe 41.43 is connected to a check valve 45.47. Check valve 4
5.47 is connected to one end of pipe 49.51,
The 49.51Ω sacrum end of the pipe is connected to the B boat and A boat of the proportional solenoid 53. In addition, pilot pressure is provided in the middle of piping 49.51 and check valve 47.45.
55.57 are connected.

The proportional solenoid 53 includes a solenoid 5OL1.5Q.
L2 is provided. Furthermore, P of the proportional solenoid 53
One end of a pipe 59.degree. 61 is connected to the boat and the R boat, and the other end of the pipe 59 is connected to eight boats of a proportional solenoid 63 for tip positioning. The other end of the pipe 61 is communicated with a tank 65.

The proportional solenoid 63 is equipped with a solenoid SQL3. One end of piping 67.69 is connected to the P boat and R boat of the proportional solenoid 63.
．． The other end of 69 is connected to one end of piping 71 . The other end of the pipe 73 is connected to a pressure source 73.

Said distribution! One end of a pipe 75 is connected to the middle of the pipe 67, and a check valve 77 is connected to the other end. Piping 6
A pressure reducing valve 79 is provided in the middle of the pipe 7, and a pipe 81 for pilot pressure is connected in the middle of the pressure reducing valve 79 and the pipe 61.

Solenoid 5OL1゜5QL of the proportional solenoid 53
2 and the solenoid 5OL3 of the proportional solenoid 63 are connected to the NC41 position 29.

With the above configuration, when the feed vise 9 is moved rightward in FIG. 2, oil is discharged from the pressure source 73 into the pipe 71. The oil in the pipe 71 is sent to the P boat of the proportional solenoid 63 via a pipe 67 and a pressure reducing valve 79. NC device! When the solenoid 5OL3 is excited by a command from the proportional solenoid 53, the P boat and the B boat are communicated with each other, so that oil is sent to the piping 59 and then to the P boat of the proportional solenoid 53.

Then, the solenoid 5OL2 of the proportional solenoid 53 is turned to N.
C-suite! Since the P boat and the A boat are energized by the command from f29 and communicated with each other, the oil in the pipe 59 is sent to the pipe 51, and is also sent to the rear cylinder chamber 39 of the feed cylinder 13 via the check valve 47 and the pipe 43. Then, the feed cylinder 13 is operated and the feed vise 9 is moved to the right.

When moving the feed vise 9 to the left in FIG.
Since the P boat and the 8th boat are connected, the water is sent to the piping 49, and is also sent to the front cylinder chamber 37 of the feed cylinder 13 via the check valve 45 and the pipe 41, so that the feed cylinder 13 is activated and the feed vise 9 is activated. It will be moved to the left.

Next, the operation of this embodiment for feeding the workpiece W to the cutting section 3 will be explained using FIGS. 3 to 9.

First, in FIG. 3, the workpiece W is placed on the feed vise 9 from above using a crane or the like as indicated by the arrow. At that time, a length A is secured at the forward end of the feed vise 9 so that the main vise 5 can clamp the workpiece W, as shown in FIG. In addition, the feeding vise 9 is a moving vise 9M.
is operated to clamp the workpiece W, and the main body vise 5 is in a fully closed state.

When the tip positioning start switch is pressed in the state shown in FIG.
(to the right in the figure), and the end of the workpiece W comes into contact with the stopper plate 31 attached to the left side wall of the moving vice 5M of the main vice 5, as shown in FIGS. 4 and 5. In addition, at this time, the crumbuka of work W
Adjustment is made by the hydraulic circuit 35 so that the friction ratio is greater than the feeding force.

To detect whether the end of the workpiece W has come into contact with the stopper plate 31, check the position where the feed speed becomes 0 with the encoder 23 attached to detect the position of the feed vise 9, or check the position of the feed vise 9. The forward end limit switch 33 attached to the moving vise 5M in step 5 detects the forward end position of the feed vise 9, and this position is set as the origin position of the tip position of the workpiece W.

Next, as shown in Fig. 6, the feed vise 9 is moved back a small amount with the feed cylinder 13 (moves a small amount to the left in Fig. 6).
Then, fully open the main body vise 7.

The feed vise 9 is advanced and positioned, and then the workpiece W is clamped by the main body vise 7. At this time, if the limit switch 33 for the forward end is turned on before positioning, the feed vise 9 will position backward by the remaining feed amount after the grip change; the feed vise 9 will advance to the forward end position after the grip change. Thereafter, the workpiece W is clamped using the body vise 7 and a positioning operation is performed. In FIG. 7, 8 dimensions are measured in advance and stored in, for example, the NC device 29 as machine parameters, and dimension C is the cutting dimension + cutting allowance.

In FIG. 7, if the feed vise 9 is not at the cutting start position, the feed vise 9 is moved (for example, to the forward end to determine the origin position for automatic feeding) to the cutting position. Cutting then begins.

In the state shown in Fig. 7, when the material cannot be fed to the tip positioning dimension (C) in one feed, the detection that the material cannot be fed in one time is determined by the limit switch 33 for the forward end during material feeding after positioning the origin. is Figure 8.

When turned on as shown in Fig. 9, if the length sent to the present on the NC device 29 side is D, then the distance E of (C-D)
is positioned while retracting the feed vise 99. After the feed vise 9 clamps the workpiece W, it advances to the front end and completes the positioning.

Further, the operation will be explained with reference to the flowchart of FIG. 10. In step S1, the workpiece W is carried onto the feeding vise 9 using a crane or the like. In step S2, the workpiece W is clamped by the feed vise 9, and the main body vise 7 is fully closed. In step S3, the tip positioning is started, and in step S
4, the bandsaw blade 8 is raised and the feed vise 9 is advanced.

At this time, the solenoid 5OL3 in the proportional solenoid 63 of the hydraulic circuit 35 is turned on, and further the solenoid 2 in the proportional solenoid 53 is turned on.

In step S5, the tip of the workpiece W is connected to the stopper plate 3.
1. At this time, the determination is made when the pulse count of the encoder 23 becomes 0.

In step S6, the point when the tip of the workpiece W contacts the stopper plate 31 is set as the origin position for tip positioning.

Next, in step S7, the feed vise 9 is slightly retracted.

The solenoid 5QL3 of the proportional solenoid 63 is turned OFF, and the solenoid 5OL1 of the proportional solenoid 53 is turned ON.

In step S8, the feed vise 9 is moved back a small amount and stopped. In step S9, the main body vise 7 is fully opened.

Turn on 5QL2 of the proportional solenoid 53 in step S10
position the tip. In step 811, it is determined whether the limit switch 33 for the forward end is turned on.

If the limit switch 33 is not ONL, in step 812 the proportional solenoid 53 is positioned and then stopped. Furthermore, in step 813, the workpiece W is
Clamp to complete the clamp. Step 814
Open the feed vise 9 in step 815, and open the feed vise 9 in step 815.
The workpiece W is automatically transported to the origin position. Step 8
At step 16, the automatic cutting operation starts, and the band saw blade B suddenly descends to cut the workpiece.

If the limit switch 33 is ON in step 811, the process advances to step S17. At this time, it is assumed that the workpiece W is fed by the length Ll using the feeding vise 9. Step 8
At step 17, after clamping the workpiece W with the main body vise 7, the feed vise 9 is unclamped.

At step 818, the material is automatically fed by the feeding vise 9 and brought to the origin position. The vice 9 sent in step 819 is (
Move back by Lo (10 cuts - L+) and position. That is, solenoid 8011 is turned on. Step 820
After clamping the workpiece W with the feed vise 9, the workpiece W is unclamped from the main body vise 7. Step S21
The feed vise 9 is moved forward (the solenoid 5QL2 is turned on), and the process returns to step 811.

In this way, the workpiece W can be clamped by the feed vice 9 to locate and position the origin. During positioning, if the feed length is insufficient, normal frequency feed is performed. Therefore, everything from the time the workpiece is carried in and clamped with the feed vise 9 to the end of the workpiece and the start of cutting can be performed automatically, and the precision of the end of the workpiece is much better than before, and labor is saved. can be achieved.

Note that this invention is not limited to the embodiments described above, and can be implemented in other forms by making appropriate changes. In this embodiment, the stopper plate 3
Encoder 23 as a method of detecting contact with 1.
However, as shown in FIGS. 11(A) and (B), the minute displacement limit switch 83 and load cell 8
5 may be detected.

Further, in this embodiment, the stopper plate 31 is provided on the side wall of the moving vice 7M in the main vice 7, but it may be provided on the front vice, and the stopper plate 31 may have a relief structure during material feeding.

For example, this may be done with a swing or lift cylinder. In general, the main body vise 7 itself may also be used as the stopper plate 31 without providing the stopper plate 31.

Furthermore, the front vise may be used as a moving method, and the stopper plate 31 may be attached to the front vise, and the origin position and cutting size may be determined using an encoder or linear scale that detects the amount of movement of the front vise. Further, the front vise itself may have a structure that does not move, and may also be used as the stopper plate 31.

[Effect of the Invention 1] As understood from the above description of the embodiments, according to the present invention, the workpiece to be cut is clamped by the feeding vise and then fed to the cutting section. At this time, the end of the workpiece is abutted against the stopper member, and the abutted end of the workpiece is set at the origin position. After the workpiece is fed from this origin position to the cutting section by the cutting length using a vise and detected by the metering means, the workpiece can be cut to the desired cutting length using the cutting machine. As a result, the precision of the product obtained by cutting the workpiece is improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a horizontal bandsaw machine as a cutting machine for carrying out this invention, FIG. 2 is a side view of FIG. 1, and FIGS. 3 to 9 are explanatory diagrams explaining the operation of this embodiment. FIG. 10 is a flowchart explaining the operation of this embodiment, and FIGS. 11A and 11B are diagrams showing another embodiment of the apparatus for detecting the stopper plate. 1...Horizontal band saw machine (cutting machine) 3...Cutting section 7...Body vice 9...Feeding vice 13-...Feeding cylinder 23...Encoder 31...Stopper plate (stopper member) )33・
··Limit switch

Claims (2)

[Claims] (1) When cutting a workpiece to be cut, which is clamped by a feed vise and fed, in the cutting section of a cutting machine, the end of the workpiece is brought into contact with a stopper member, and the abutment position is set at the point where the workpiece is fed. A cutting method characterized in that the workpiece is cut at an origin position, and the workpiece is automatically fed by a preset cutting length from this origin position to position the end of the workpiece and then cut. (2) A movable feed vise that clamps and feeds the workpiece, a stopper member that serves as the origin position when positioning the end of the workpiece against it, and a cutting section that cuts from this stopper member. A cutting device comprising a measuring means for automatically feeding the workpiece by the length and measuring the end position of the workpiece.