JP2000005928A - Cutting method and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend the life of a cutting tool by changing the cutting conditions of the cutting tool for the machining of the end section of a work and the portion other than the end section of the work. SOLUTION: The last end face of a work W installed on a support roller 21 in contact with a reference roller 2 is pushed by the contact piece 33 of a length measuring wheel 29 to measure the length of the work W to be fed, and the work W is fed to the position of a band saw blade BS. The work W is fixed by a main body bias mechanism and a front bias mechanism near the band saw blade BS, and the work W is cut by the traveling band saw blade BS. The work W is fed to a horizontal band sawing machine, the prescribed size is measured from the end section of the work W by the length measuring wheel 29, the signal is fed to a file, the saw edge feed and saw edge speed are specified as the cutting conditions of the portion other than the end section of the work W, then a saw edge feed controller and a saw edge speed controller are controlled to cut the portion other than the end section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting method for cutting a workpiece having a predetermined length with a cutting tool and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, when cutting a work having a predetermined length with a band saw blade as a cutting tool, for example, regardless of the end of the work or the center in the longitudinal direction of the work, the material, If the cross-sectional shape and the cross-sectional size are the same, cutting is generally performed under the same cutting conditions including the feed and speed of the band saw blade.

[0003]

The end of a work having a predetermined length is often hardened by heat or the like as compared with the center in the longitudinal direction. When cutting is performed under the same cutting conditions, there is a problem that a band saw blade as a tool is adversely affected, and a long life cannot be achieved.

An object of the present invention is to provide a cutting method and apparatus for extending the life of a cutting tool when cutting a workpiece having a predetermined length.

[0005]

According to a first aspect of the present invention, there is provided a cutting method for cutting a work having a predetermined length by using a cutting tool. And the cutting process is performed by changing the cutting conditions for portions other than the end of the work.

Therefore, when cutting a workpiece having a predetermined length, it is determined whether or not the workpiece is an end of the workpiece.
When performing the cutting process at the end, the cutting condition is not the same as the cutting condition of the portion other than the end, and the cutting condition is changed, and the cutting process is performed under a cutting condition closer to the optimum. Further, when cutting is performed on a portion other than the end, the cutting is performed under a preset cutting condition. Thus, the life of the cutting tool can be made longer than in the conventional case where the end portion and the portion other than the end portion are cut under the same cutting conditions.

According to a second aspect of the present invention, there is provided a cutting machine with a length measuring device for measuring the length of a workpiece, a cutting tool feed control module for controlling a feed of a cutting tool, and controlling a speed of the cutting tool. A cutting tool speed control module, a cutting tool feed that cuts parts other than the end of the work, a cutting condition file containing cutting conditions consisting of the cutting tool speed, and a cutting condition filed in this cutting condition file A cutting tool feeder for cutting the end of the work based on the cutting tool speed; and a processing means for calculating and processing a cutting condition including a cutting tool speed.

Therefore, when cutting a work having a predetermined length, the end of the work is measured by a length measuring device provided in the cutting machine, and the measured end is cut. At the time, cutting tool feed to cut the part other than the end of the work filed in the cutting conditions / file,
Based on the cutting condition consisting of the cutting tool speed, the processing condition is calculated by the arithmetic processing means. For example, a cutting tool feed and a cutting tool speed, which are cutting conditions for a portion other than the end portion, are multiplied by a predetermined parameter, and a cutting condition closer to the optimum is calculated. Next, a command is given to the cutting tool feed control module and the cutting tool speed control module to control the feed and speed of the cutting tool to perform cutting.

When the length of the portion other than the end of the work is measured by the length measuring device, and the cutting is performed to the length of the portion other than the measured end, the cutting condition file is used. Cutting conditions consisting of cutting tool feed and cutting tool speed are specified, and the cutting tools are sent to the cutting tool feed module and cutting tool speed module with commands under these specified cutting conditions, and the cutting process is performed by controlling the cutting tool feed and speed. Is performed.

Thus, the life of the cutting tool can be made longer than in the conventional case where the end portion and the portion other than the end portion are cut under the same cutting conditions.

[0011]

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

FIG. 2 shows, for example, an entire horizontal band sawing machine 1 as an example of a cutting machine. This horizontal band saw machine 1
A cutting section 3 for cutting the work W, a support section 5 for placing and supporting the work W, a feeding section 7 provided alongside the support section 5 for feeding the work W by a predetermined length; And a vice mechanism section 9 for holding and fixing the workpiece W sent at the time of cutting.

The cutting section 3 has a band saw blade BS as an example of a cutting tool, and a saw blade housing 11 that supports the band saw blade BS so as to be able to travel. In the saw blade housing 11, a pair of drives for rotatably driving the band saw blade BS are provided.
The driven wheels 13 and 15 are housed therein and are turned up and down by a known lifting device by a saw blade cutting control unit 17 as an example of a cutting tool feed control module shown in FIG. I have. The band saw blade BS is controlled by the saw blade speed control unit 19 as a cutting tool speed control module shown in FIG.
Speed is controlled.

The support section 5 has a material feeding table 23 provided with a plurality of support rollers 21 provided in a horizontal direction so as to movably mount and support the material. The material feeding table 23 is provided with a reference roller 25 (see FIG. 3) for feeding the workpiece W to a predetermined position, with its rotation axis set in a vertical direction.

In the feeding section 7, a guide rail 27 for feeding the workpiece W is provided along the feeding table 23 in the feeding direction (X-axis direction in FIG. 2). A length measuring wheel 29 as an example of a length measuring device that measures the length of the workpiece W to be fed is movably provided. The length measuring wheel 29 is provided with a support member 31.
As shown in FIG. 4, a contact 33 is provided at the tip of the support member 31.

The vise mechanism 9 includes a main body vise mechanism 35 for fixing the workpiece W at a position before the band saw blade BS (upper left side in FIG. 2) at the time of cutting, and a position in front of the band saw blade BS (lower right in FIG. 2). Side), and a front vice mechanism 37 for fixing the work W to be cut and unloading the cut work W. Also,
A control device 39 is provided near the main body of the horizontal band saw machine 1.

The main body vice mechanism 35 has a main body fixed vice jaw 41 (see FIG. 4) as a reference vice jaw, and a main body movable vice jaw 43 which can freely move toward and away from the main body fixed vice jaw 41.

The front vice mechanism 37 has a front fixed vice jaw 45 and a front movable vice jaw 47 which can be moved toward and away from the front fixed vice jaw 45, and the work W Reciprocating in the material feeding direction. In order to cut the workpiece W at an angle, the cutting section 3 and the vice mechanism section 9 can be turned integrally.

With the above configuration, the contact 33 of the measuring wheel 29 presses the rearmost end face of the work W placed on the support roller 21 and abutting on the reference roller 25, The work W is fed to the band saw blade BS while measuring the length of the work W to be fed. Then, the work W is fixed by the main vise mechanism 35 and the front vice mechanism 37 approaching the band saw blade BS, and the work W is cut by the traveling band saw blade BS. Cut work W
Is transported in the material feeding direction while being sandwiched by the front vice mechanism 37 and is carried out.

FIG. 4 shows the details of the contact 33 provided on the length measuring wheel 29 and the state in which the contact 33 pushes the rearmost end face of the work W.

That is, the contact 33 is provided with an arm 51 projecting to the left in FIG. 4 from a rectangular pressing portion 49 for pressing the rearmost end face of the work W. A groove 53 is formed at a position corresponding to the position of the arm 51 in the body fixing vice jaw 41 serving as a reference side in a material feeding direction (a direction perpendicular to the paper surface in FIG. 4) to prevent interference with the arm 51. I have.

With the above configuration, when the contact 33 pushes the H-shaped steel having the thin flange WF, the rear end of the work W is moved to the reference roller 25 as shown in FIG. Will be pushed in contact with the

Further, since the groove 53 is formed in the body fixing vice jaw 41 at a position corresponding to the arm 51 of the contact 33, the arm 51 of the contact 33 even when the length measuring wheel 33 approaches the cutting position. Does not collide with the body fixing vice jaw 41.

Therefore, according to the length measuring device 29 in such a horizontal band sawing machine 1, it is possible to accurately measure even a thin steel plate, and it is possible to cut it into a desired length. Become.

The control device 39 has a CPU 55. The CPU 55 is connected to an input means 57 such as a keyboard for inputting various data and a display means 59 such as a CRT for displaying various data. Have been. The CPU 55 has the length measuring wheel 29,
A saw blade feed controller 17 and a saw blade speed controller 19 are connected.

In the CPU 55, for example, a length α of 3 to 20 mm from the front end face and the rear end face to the end of the work W is inputted in advance from the input means 57 and stored.
The memory 61 is connected.

Further, the length L of the work actually measured by the length measuring wheel 29 is measured and taken into the CPU 55,
A work length comparison / judgment means 63 for comparing and judging L with α and L with (L ₀ −α) (where L _{0 is} the length of the work) is connected. Further, the CPU 55 sets a cutting condition / file 65 in which the optimum saw blade feed F and the saw blade speed V are set and filed in advance when cutting a portion other than the end portion.
Is connected, and the cutting conditions for cutting the end of the workpiece W are calculated based on the saw blade feed F and the saw blade speed V of the cutting conditions stored in the cutting condition file 65. Operation processing means 67 is connected.

With the above configuration, when cutting a work W having a predetermined length L ₀ , the length L from the end face of the work W is measured by the length measuring wheel 29 provided on the horizontal band sawing machine 1. Then, it is taken into the work length comparison / determination means 63 of the control device 39. The work length comparison / judgment means 63 takes in the end length α and the end length α stored in the memory 61, so that the work length comparison / judgment means 63 compares the actually measured length L with the end length α. And L = α
Is cut off at the end.

At this time, the cutting saw blade feed F and the saw blade speed V as cutting conditions other than the end portion stored in the cutting condition file 65 are taken into the arithmetic processing means 67, and the cutting condition of the end portion is taken as the cutting condition. Saw blade feed FA, saw blade speed V
After the arithmetic processing of B is performed, the saw blade feed control unit 17 and the saw blade speed control unit 19 are controlled to cut the end α. However, the parameters of A and B are ratios defined in advance. Moreover, the parameters A and B are defined uniformly regardless of the material, the cross-sectional shape, and the cross-sectional size.
It may be defined for each cross-sectional shape and cross-sectional size.
Usually, the saw blade feed and saw blade speed of the cutting condition of the end are:
The saw blade feed and the saw blade speed of the cutting conditions other than the end portion are set to be slower than the saw blade speed so as to be nearly optimum conditions.

[0030] After the cut the end of the workpiece W, and Okuzai the workpiece W to the horizontal band saw 1, and measuring a predetermined dimension L ₁ from the end portion α in measuring wheel 29, this signal is disconnected condition After the saw blade feed F and the saw blade speed V are specified as cutting conditions for the portion other than the end portion by being taken into the file 65, the saw blade feed control unit 17 and the saw blade speed control unit 19 are controlled to control the end. The cutting process is performed on portions other than the portion.

Furthermore, after a predetermined cutting dimension L ₁ with respect to the length L of the workpiece W is performed a plurality of times, the actual length L is taken in the work length comparative determination unit of the work W 63
Then, when L = (L ₀ −α), the same cutting process as in the case of the end portion α is performed.

As described above, by changing the cutting conditions (saw blade feed and saw blade speed) of the end portion α of the work W and the portion other than the end portion, the end portion hardened by the influence of heat or the like can be more optimally formed. Since the cutting is performed under similar conditions, the life of the band saw blade BS as an example of the cutting tool can be extended.

FIG. 5 shows another embodiment instead of FIG. 5, the same components as those in FIG. 2 are denoted by the same reference numerals, and redundant description will be omitted. 5, the rear side of the main body vice mechanism 35 (the left side in FIG. 5).
, A rear vice mechanism 73 including a rear fixed vice jaw 69 and a rear moving vice jaw 71 is provided to be movable in the front-rear direction. The rear vice mechanism 73 is provided with a work detection sensor 75. That is, a light emitter 75A is provided on the rear fixed vice jaw 69 side, and a light receiver 75B is provided on the rear movable vice jaw 71.

With the above configuration, the work W moves forward and
In this state, when the light passes through the rear vice mechanism 73, the light from the light emitter 75A of the work detection sensor 75 is blocked by the work W and does not reach the light receiver 75B, whereby the work W is detected.

The operation of detecting the leading end of the work W with the band saw shown in FIG. 5 will be described with reference to the flowchart shown in FIG.
To perform 0 (zero) clamp processing. That is, the main body moving vice jaw 43 is moved and abutted against the main body fixed vice jaw 41. Further, the rear vice mechanism 73 is made to stand by at the rear end, and the rear moving vice jaw 71 of the rear vice mechanism 73 is widened.

In step S4, the support roller 21 supporting the work W is rotated to advance the work W at a high speed.
In step S5, it is determined whether the work W is detected by the work detection sensor 75 of the rear vice mechanism 73, and when the work W is detected by the work detection sensor 75,
In step S6, the rotation of the support roller 21 becomes slow, and the work W is advanced at a low speed. In step S7, the work W is advanced by the timer time so that the end face of the work W is protruded toward the band saw blade BS by a predetermined length by the end face of the rear vice mechanism 73 on the band saw blade BS. In step S8, the support roller 21 is stopped.

In step S9, the rear vice mechanism 73 is operated to clamp the work W. Step S1
At 0, the rear vice mechanism 73 is advanced under reduced pressure. In step S11, it is determined whether or not the X-axis encoder pulse of the rear vice mechanism 73 has stopped for a specified time (parameter).
When stopped, the tip of the work W is determined in step S12 (tip = abutting position (parameter)). Step S13
To move the rear vice mechanism 73 backward at a low speed. Step S
In step 14, when the main body vise mechanism 35 moves in the width direction, the workpiece W and the main body vise mechanism 35 are retracted by the distance of the parameter value in order to prevent the main body vise mechanism 35 from rubbing. The processing is performed, and the tip of the workpiece W is positioned. In this state, thereafter, a normal material feeding positioning process is performed, and the work W is cut.

Next, the detection of the tail end of the work W will be described with reference to the flowchart shown in FIG.
At 21, it is determined whether or not the work W has been detected by the work detection sensor 75 while the rear vice mechanism 73 is retracting in the unclamped state. When the work W is detected, the rear vise mechanism 73 is advanced at a medium speed in step S22. . Next, in step S23, the work W is detected by the work detection sensor 75.
Is detected, in step S24, the rear vice mechanism 73
At a low speed, and when the work W is detected by the work detection sensor 75 in step S25, the process proceeds to step S26.
As shown in FIG. 8, the tail end of the work W is determined. That is, tail end = X coordinate of rear vice mechanism 73+
It is determined by the rear vice work detection offset (parameter).

The cutting method described with reference to FIGS. 1 to 4 can also be performed in the band sawing machine described above.

The present invention is not limited to the above-described embodiments, but can be embodied in other forms by making appropriate changes. In this embodiment, a horizontal band saw machine has been described as an example of a cutting machine. However, a vertical band saw machine or another cutting machine may be used.

[0041]

As will be understood from the above description of the embodiments of the present invention, according to the first aspect of the present invention, when a workpiece having a predetermined length is cut, an edge of the workpiece may be cut. Judging whether or not to cut the end, change the cutting conditions instead of the same as the cutting conditions of the parts other than the end,
Cutting is performed under more optimal cutting conditions. Further, when cutting is performed on a portion other than the end portion, the cutting is performed under a preset cutting condition. Thus, the life of the cutting tool can be made longer than in the conventional case where the end portion and the portion other than the end portion are cut under the same cutting conditions.

According to the second aspect of the invention, when cutting a work having a predetermined length, the end of the work is measured by a length measuring device provided in the cutting machine, and the measured length is measured. When performing cutting at the end, the processing means uses a cutting tool to cut the part other than the end of the work filed in the cutting conditions and file, based on the cutting conditions consisting of the cutting tool speed. The cutting condition at the end of is calculated. For example, a cutting tool feed and a cutting tool speed, which are cutting conditions for a portion other than the end portion, are multiplied by a predetermined parameter, and a cutting condition closer to the optimum is calculated. Next, a command is given to the cutting tool feed control module and the cutting tool speed control module to control the feed and speed of the cutting tool to perform cutting.

When the length of the part other than the end of the work is measured by the length measuring device, and the cutting is performed to the length of the part other than the measured end, the file is stored in the cutting condition file. Cutting conditions consisting of cutting tool feed and cutting tool speed are specified, and commands are given to the cutting tool feed module and cutting tool speed module under these specified cutting conditions to control the cutting tool feed and speed to perform cutting. Is performed.

Thus, the life of the cutting tool can be made longer than in the conventional case where the end portion and the portion other than the end portion are cut under the same cutting conditions.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a main part of the present invention and a configuration in a cutting machine.

FIG. 2 is a perspective view of a cutting device provided with a length measuring device in the cutting machine of the present invention.

FIG. 3 is a plan view of a material feeding table portion in the cutting device.

FIG. 4 is an explanatory view showing an example of a contact which is a part of a length measuring device in the cutting device.

FIG. 5 is a plan view showing another embodiment of the cutting machine.

FIG. 6 is a flowchart of an operation of detecting a leading end of a work in FIG. 5;

FIG. 7 is a flowchart of an operation for detecting a tail end of a work in FIG. 5;

FIG. 8 is an explanatory diagram for detecting a position of a tail end of a work.

[Explanation of symbols]

Reference Signs List 1 horizontal band sawing machine (cutting machine) 17 saw blade feed control unit (cutting tool feed control module) 19 saw blade speed control unit (cutting tool speed control module) 29 length measuring vehicle (length measuring device) 39 control device 61 end length・ Memory 63 Work length comparison / judgment means 65 Cutting condition ・ File 67 Operation processing means BS band saw blade (cutting tool)

Claims (2)

[Claims] When cutting a workpiece having a predetermined length with a cutting tool using a cutting tool, the cutting is performed by changing cutting conditions for an end of the work and a portion other than the end of the work. How to cut. 2. A cutting machine with a length measuring device for measuring the length of a work, a cutting tool feed control module for controlling a feed of a cutting tool, a cutting tool speed control module for controlling a speed of a cutting tool, and a work. A cutting tool that cuts the part other than the end of the workpiece. A cutting condition file containing cutting conditions consisting of feed and cutting tool speed, and cutting the end of the workpiece based on the cutting conditions and the cutting conditions filed in the file. And a calculating means for calculating a cutting condition comprising cutting tool feed and cutting tool speed.