JPH05309518A - Automatic starting method for cutter and its device - Google Patents

Abstract

PURPOSE:To start a sizing cut work automatically after performing the origin location of a work automatically in a cutter. CONSTITUTION:A cutter 1 is provided with a main stock vice 7 for fixing a work W in a sandwiching state and a feeding stock vice 9 for feeding the work W to a cutting tool 17 in a cutting processing unit by a prescribed amount. And the cutter 1 is constituted of a sensor 27 which is provided in the cutting processing unit for detecting the tip part of the work W, a location means 33 which makes the tip part WF of the work W locate at a cutting plane line 23 in the cutting processing unit according to a signal from the sensor 27, and a controller 37 which makes a sizing-feed material start automatically, after the tip part is made to locate at the cutting plane line in the cutting processing unit by the location means 33 to perform the origin location of the work W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting machine automatic starting method and apparatus for automatically positioning a tip of a work when cutting the work with the cutting machine.

[0002]

2. Description of the Related Art Conventionally, various methods have been known for locating the origin of the tip of a work in a cutting machine and starting the sizing of the work.

First, an operator positions the origin while measuring the tip of the work from the position of the cutting tool with a steel scale,
There was a method to start the fixed-size cutting of the work.

Secondly, there is a method in which the tip of the work piece is excessively projected from the position of the cutting tool toward the front and set, and the work piece is cut off, and then the work piece is cut to a predetermined size.

Third, the workpiece is initially positioned by abutting the tip of the workpiece against a movable mechanical stopper provided on the base, and the work is cut to a fixed size by correcting the distance between the mechanical stopper and the cutting line. There was a way to get started.

[0006]

In the first method, which is known in the prior art, as the method of positioning the origin of the work tip and starting the sizing cutting, the cutting is performed by the operator's naked eyes. Since it has to be done with consideration of margin correction, etc., it has always been difficult to perform accurate origin positioning.

Next, the second method cannot be applied when the work length is short and there is no room to cut it.

Further, in the third method, since the mechanical stopper cannot exist on the same line as the cutting tool, a machine for presetting and a device for correcting the error are required, which causes a problem of high cost. If there is a mechanical fixed-size reciprocating device, there is also a problem that the movable mechanical stopper interferes and cannot be used.

The object of the present invention is to solve the above problems.
Positioning of the origin of the tip of the workpiece before the start of constant-dimension cutting
An object of the present invention is to provide an automatic start method for a cutting machine and a device therefor that are always performed accurately and do not require a preset machine or an error correction device.

[0010]

In order to achieve the above object, the present invention, when feeding a work clamped by a feed vise to a cutting processing section and cutting it with a cutting tool of the cutting processing section, The fact that the tip of the work has passed the cutting line of the cutting tool in the cutting section is detected by a sensor provided in line with the cutting line, and the origin of the workpiece can be positioned by positioning the tip of the work on the cutting line. After being done
The automatic start method for a cutting machine is characterized in that the constant-size feed operation is automatically started by the feed vise.

Further, the present invention is a cutting machine equipped with a main body vise for holding and fixing a work, and a feed vise for feeding the work to a cutting tool of a cutting processing section at a fixed size. A sensor provided to match the cutting line for detecting the tip of the work, and a positioning means for positioning the tip of the work on the cutting line of the cutting processing portion by a signal from the sensor, A positioning device for positioning the tip of the work at the cutting line of the cutting portion to perform the origin positioning of the work, and then for automatically starting the sizing feed. An automatic start device for the cutting machine was constructed.

[0012]

In the above construction, the work to be cut is first clamped by the feed vise and then fed to the cutting tool of the cutting section. At this time, the sensor detects that the tip of the work passes through the cutting line of the cutting processing section.

When the sensor detects that the front end of the work has passed the cutting line of the cutting section, the signal of the sensor is transmitted to the positioning means. With this positioning means, when the work is retracted a small amount and then the work is advanced again,
The sensor detects that the front end of the work has reached the cutting line of the cutting processing portion, and performs the front end positioning of the work, that is, the origin positioning.

When the origin positioning of the workpiece is completed, the signal is transmitted to the control device to automatically start the cutting.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, an outline of a horizontal band saw machine (cutting machine) 1 as a cutting machine will be described with reference to FIG. On the base 3 of the horizontal band saw machine 1, a support 5 on which a work W is placed, a main body vice 7 for holding and fixing the work W placed on the support 5, and a work W sandwiched and fed. A feeding vise 9 for performing a material operation is attached.

A saw blade housing 11 is supported on the base 3 via a hinge pin (not shown) so as to be vertically swingable. A drive wheel (not shown) that is rotated by a drive means such as a motor is provided inside one of the housing portions 13 of the saw blade housing 11, and a driven wheel (see FIG. (Not shown). A loop-shaped saw blade (cutting tool) 17 is wound around the drive wheel and the driven wheel, and the saw blade 17 is driven to rotate by rotationally driving the drive wheel.

Further, in FIG. 1, the saw blade housing 11
A first control device 19 is mounted on the upper part of the saw blade 17 to control the operations of the feed vise 9 and the main body vise 7 in order to feed the work W at a constant size, and at the same time, the saw blade 17 and the saw blade housing 11 By controlling the above-mentioned operation, the constant-size cutting operation of the work W is controlled. Further, before starting the constant-size feeding operation of the work W, the cutting tool back side line of the saw blade 17 in the cutting processing section 21 (see FIG. 2) is cut across the feeding surface in order to perform origin positioning of the work W. The light emitter 2 of the transmissive sensor 27 for causing the detection light beam 25 to run in the left-right direction in conformity with the cutting line 23.
9 and the light receiver 31 are provided on the base 3. Positioning means 33 for sensing the passage of the work W through the detection light beam 25 of the sensor 27, controlling the operations of the feed vice 9 and the main body vice 7, and performing the origin positioning of the work W, The second control device 37, which has a built-in automatic start device 35 that senses the completion of the positioning of the origin and instructs the first control device 19 to start the constant-size feeding of the work W and the constant-size cutting of the first control device 19, It is installed on the top. In addition, on the front surface of the second control device 37,
A start button 39 is provided for automatically starting the all cutting operation.

Next, with reference to FIGS. 2 and 3, the details of the main body vise 7, the feed vise 9, and the cutting portion 21 will be described. First, the feed vise 9 has a sliding base 41 that slides back and forth along the support table 5 provided on the base 3, on which a fixed vise 43 and a moving vise 45 are provided. Is provided. The moving vise 45 is formed so as to approach and separate from the fixed vise 43 via the piston rod 49 by the operation of the cylinder 47, and clamps the work W with the fixed vise 43.

A ball screw 51 for sliding the sliding base 41 of the feed vise 9 back and forth is mounted on the base 3.
Is rotatably supported and is screwed into a ball nut 53 provided on the sliding base 41. Then, in order to drive the ball screw 51 to rotate, a drive motor 55
Is provided on the rear side of the base 3. Further, the base 3 is provided with a limit switch LS1 as a mechanical stopper which is movably fixed and is provided. The rear end surface 41R of the sliding base 41 is brought into contact with the limit switch LS1 so that the feeding vise 9 performs a constant-size feeding operation. The position of the rearmost end in is regulated.

Further, a feeding vise 9 is attached to the main body vise 7.
The fixed base 63 is provided with a cylinder 61 for clamping the workpiece W fed by the fixed vise 57 and the moving vise 59. A limit switch LS2 as a mechanical stopper is fixedly provided on the base 3 near the lower rear end of the fixed base 63.
The sliding base 41 is brought into contact with the front end surface 41F to regulate the foremost end position of the feed vise 9 in the fixed-size feeding operation.

Light-emitting body 2 in the transmissive sensor 27
The positions of 9 and the light receiving body 31, that is, the position of the detected light beam 25 in the front-rear direction is determined by the cutting tool back side line 23 of the saw blade 17 in the cutting processing section 21. The reason is the width of the saw blade 17,
That is because there is a cutting allowance. Therefore, the stroke of the constant-size feeding material is the sum of the product length L ₁ and the cutting margin L ₀ .

With the above structure, the operation of the embodiment of the present invention will be described with reference to the operation explanatory diagrams of FIGS. 4 and 5 and the flowchart of FIG. First, in order to cut the product length L ₁ from the work W, the constant size feeding stroke is (L
Adjust the position of the limit switch LS1 so that it becomes ₁ + L ₀ ). To this end, assuming that the thickness of the sliding base 41 in the front-rear direction is L, the position of the limit switch LS1 is adjusted so that the distance between the fixed limit switch LS2 and the limit switch LS1 becomes (L ₁ + L ₀ + L).

Next, the work W is carried into the horizontal band saw machine (cutting machine) 1 and placed on the support 5. At this time, the front end WF of the work W moves from the front end of the feed vise 9 to the main body vise 7.
It is placed so that it comes between the rear ends (see FIG. 4A).
Then, when the start button 39 of the second control device is pressed, the operation is started so that the tip end WF of the work W is positioned by the cutting tool back side line 23 by the function of the positioning means 33. First, after the feed vise 9 clamps the work W by operating the cylinder 47, the drive motor 55 is driven and the feed vise 9 is advanced together with the sliding base 41. Then, the tip portion WF blocks the detection light beam 25 in the sensor 27, and thus the sensor 27 detects that the tip portion WF reaches the cutting tool inner side line 23 (FIG. 5A).
reference). However, as shown in FIG. 4B, the sliding base 4
Even if the front end face 41F of No. 1 contacts the limit switch LS2 and the feed vise 9 reaches the foremost position, if the sensor 27 cannot detect the tip end WF, the feed vise 9 is clamped as shown in FIG. 4C. And release the cylinder 61
4 and after clamping the main body vise 7,
As shown in (d), the feeding vise 9 is moved to the rearmost end position, that is, the rear end face 4
Move back until 1R contacts limit switch LS1. Then, the work W is clamped again by the feed vise 9 and the clamp of the main body vise 7 is released, and then the drive motor 55 is operated to move the feed vise 9 forward, so that the sensor 27 moves as shown in FIG. It is detected that the front end portion WF of the work W has passed the cutting tool inner side line 23. If the sensor 27 still cannot detect the front end portion WF, the above operation is repeated. When the tip end WF is detected, the positioning means 33 stops the drive motor 55 and then reverses the feed motor 9 so that the feed vise 9 is slightly retracted by, for example, about 10 mm, and then is advanced at a slight speed. Detect WF. Therefore, the positioning means 33 immediately stops the feed vise 9 and clamps the work W on the main body vise. Then, when the clamp of the feed vise 9 is released, the tip portion WF is accurately positioned on the cutting tool back side line 23. That is, the origin positioning of the work W is completed.

When the positioning of the workpiece W at the origin is completed, the automatic start device 35 in the second controller 37 starts the normal sizing feed operation and sizing cutting operation.
The controller 19 is instructed. The repeated operation of the above-mentioned constant-size feeding and constant-size cutting is well known, and therefore its explanation is omitted.

The operation of the second control device 37 will be easily understood by referring to the operation described above with reference to the flow chart in FIG. First, in step S1, the work W is loaded onto the feed vise 9 by a crane or the like. In step S2, the start button 39 of the second control device 37 is pressed. Then, the control of the positioning means 33 is started, and the work W is clamped by the feed vise 9 in step S3, and the main body vise 7 is fully opened. In step S4, the feed vise 9 advances. In step S5, the sensor 27 causes the tip W of the work W to move.
It is determined whether F is detected. If the sensor 27 detects the front end portion WF, the feed vise 9 is slightly retracted by, for example, about 10 mm in step S6. In step S7, the feed vise 9 is advanced at a slight speed. In step S8, the sensor 27 detects that the tip end WF has reached the cutting tool inner side line 23. Immediately in step S9, the feeding vise 9 is stopped. In step S10, the main body vise 7 is clamped and the feed vise 9 is fully opened. This completes the origin positioning of the work W.

If the sensor 27 does not detect the front end portion WF of the work W in step S5, the process proceeds to step S12.
In step S12, the body vise 7 is clamped and the feed vise 9 is fully opened. In step S13, the feed vise 9 is retracted to the last end position. In step S14, the feed vise 9 is clamped and the main body vise 7 is fully opened. In step S15, the feed vise 9 is advanced. Then, the operation returns to step S5.

When the origin positioning of the work is completed in step S10, the automatic starter 35 operates to instruct the first controller 19 to start the constant-size feeding and constant-size cutting work. In this fixed-size feeding operation, the feeding vise 9 reciprocates between the slide switches 41 and between the millimeter switches LS1 and LS2, and in the constant-size cutting operation, the work W fed by the fixed-size feeding is saw blade housing 11. Saw blade (cutting tool) 1 by swinging
This is an operation of raising and lowering 7 to cut back the fixed-size cutting, but since all are known, the explanation is omitted.

As described above, according to this embodiment, since the sensor 27 for detecting the position of the work tip portion WF is directly provided in the cutting processing portion 21, an error correction device, a preset machine, etc. are not required, which is effective in cost reduction. ..

Further, since the sensor 27 directly detects the origin position of the work tip portion WF in the cutting portion 21, there is no problem of interfering with the mechanical sizing reciprocating device.
It can be combined with an inexpensive cutting machine 1 by a simple sequencer control that does not use a device, and has an economical effect.

Further, the sensor 27 in the cutting processing section 21
Since the workpiece front end WF can be positioned at a very low speed by the positioning means 33, accurate positioning of the origin of the workpiece W can always be expected. Therefore, the next constant-dimension cutting operation can be automatically started by the automatic start device 35, so that the working efficiency is improved.

The fact that the origin of the work W can always be accurately positioned is economically advantageous because it is possible to use a short work without the need for discarding.

The present invention is not limited to the above-mentioned embodiments, but can be carried out in other modes by making appropriate changes.

[0034]

As can be understood from the above description of the embodiments, according to the present invention, the sensor for detecting the position of the tip of the work is provided in line with the cutting line of the cutting portion. No error correction device or preset machine is required, which is effective for cost reduction.

Further, since the sensor is provided so as to coincide with the cutting line of the cutting portion, the origin position of the work tip portion is directly detected, so that it is automatically combined with an inexpensive cutting machine which does not use an NC device. It is possible to perform automatic start of fixed size feed.

[Brief description of drawings]

FIG. 1 is a perspective view of a cutting machine according to the present invention.

FIG. 2 is a right side view illustrating a main part in FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is an operation explanatory view showing the operation of the work.

FIG. 5 is an operation explanatory view showing the operation of the work.

FIG. 6 is a flowchart illustrating the operation of this embodiment.

[Explanation of symbols]

 1 Horizontal band saw machine (cutting machine) 7 Main body vise 9 Feed vise 17 Saw blade (cutting tool) 21 Cutting processing part 23 Cutting tool backside line 27 Sensor 33 Positioning means 35 Automatic start device 37 Second control device (control device) W work WF tip

Claims (2)

[Claims] 1. When a work clamped by a feed vise is fed to a cutting processing section and cut by a cutting tool of the cutting processing section, the tip of the work is cut by a cutting line of the cutting tool in the cutting processing section. After passing through the sensor, a sensor provided in line with the cutting line is detected, and the origin of the workpiece is positioned on the cutting line. Automatic start method of cutting machine, which is characterized in that 2. A cutting machine comprising a body vise for holding and fixing a work, and a feed vise for feeding the work to a cutting tool of a cutting processing unit at a constant size, which coincides with a cutting line of the cutting processing section. A sensor provided to detect the tip of the work, a positioning means for positioning the tip of the work on the cutting line of the cutting processing part by a signal from the sensor, and the positioning means for positioning the tip. A control device for automatically starting the sizing material feed after the workpiece is positioned at the cutting line of the cutting processing portion and the origin of the work is positioned. Automatic starting device for cutting machine.