JPH0232339Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a material feeding control device for a saw machine such as a band saw machine, a hacksaw machine, or a circular saw machine.

When cutting steel materials, it is often necessary to make several types of cuts with different cutting lengths and numbers of pieces from a single material, but conventionally, after cutting one type of cutting length a predetermined number of times, The degree of automation was low as it required various settings. In addition, the feed stroke amount is fixed as the sum of the cutting length and a constant cutting distance, even though it is necessary to finely adjust the feed length of the material, whereas the cutting allowance changes each time the saw blade set amount changes. It is difficult to adjust because the cutting length is determined by
Therefore, the operator has to calculate and adjust the feed stroke amount accordingly, resulting in trouble and inaccuracy.

The purpose of this invention is to
Another object of the present invention is to provide a material feeding control device for a saw machine that can automatically and accurately feed and cut the material even when the cutting length is longer than the stroke of the material feeding mechanism.

Another object of the present invention is to provide a material feeding control device in which calculation of the feeding amount of the material feeding mechanism, as well as deceleration and stop commands are performed by a microcomputer.

In order to achieve this purpose, in the material feeding control device for a saw machine of the present invention, as shown in the basic conceptual diagram in Fig. 1, a saw blade b is placed near a fixed vice mechanism a that clamps the material to be processed. At the same time, a material feeding vice mechanism c is provided which can reciprocate in a predetermined direction with respect to the fixed vice mechanism a, and the material feeding vice mechanism c reciprocates once or multiple times to cut the material into a predetermined length. In the device, the material feeding vise mechanism c
A digital measuring device d that converts the displacement of the saw blade into a digital electric signal, a keyboard e for inputting the cutting length, and a cutting distance setting device f for arbitrarily setting the cutting distance of the saw blade b are provided. In addition, a memory g is used to record the cutting length input from the keyboard e, and a material feeding target value is obtained by adding the cutting length L _B stored in the memory g and the cutting allowance setting value t by the cutting allowance setting device f. A digital calculation means h that calculates L _O , the calculation result L _O , and the maximum stroke of the material feeding vise mechanism c
A comparison means _{i is provided to compare the L S with the L} After one material feeding process of the material vise mechanism c, the material is clamped by the fixed vice mechanism a, and when L _O > L _S , one material feeding process of the maximum stroke L _S of the material vice mechanism c is performed. Or, after completing all the material feeding processes in which the target value is the fraction of the material feeding distance obtained by subtracting the material feeding distance from the material feeding target value L _O multiple times, the fixed vise mechanism a holds the material. A control means j is provided.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a plan view of a bandsaw machine according to an embodiment of the present invention, and FIG. 2 shows a side view thereof.

A column stands upright on a base 1, and a band saw blade is suspended between a pair of left and right saw wheels mounted on a saw frame 2 that moves up and down along the column, and a motor that rotates the saw wheels and lifts the saw frame 2. The cutting of the material G is controlled by a hydraulic cylinder that controls the lowering. In FIG. 1, a straight line P represents the cutting position by the bandsaw blade.

A main vice mechanism 3 is provided close to the cutting position on the base 1 to clamp the material G to be cut in a fixed position. The main vice mechanism 3 is composed of a fixed vice jaw 4, a movable vice jaw 5, a hydraulic cylinder 6 for driving the movable vice jaw 6, and related mechanisms.

A material conveying device is provided behind this main vice mechanism. Guide rails 7A and 7B are provided in the front and rear directions on the base 20, and a reciprocating table 9 that is displaced in the front and rear direction by a hydraulic cylinder 27 is placed along the guide rails, and a material feeding vice mechanism 1 is placed on the reciprocating table.
0 is set. This material feeding vice mechanism 10
Fixed vise 11, movable vise 1
2. Hydraulic cylinder 1 that drives the movable vise jaw
3 and related mechanisms.

In order to measure the position of the material feeding vice mechanism 10, a rack 14 attached to the side surface of the carriage 9, a pinion 15 engaged with the rack 14 and pivotally supported on the side surface of the base 1, and the pinion An encoder 16 is provided that converts the rotation angle of the 15 axes into a digital electrical signal. Further, a limit switch 17 is provided at the rear end of the base 1 in order to detect the limit at which the carriage 9 is displaced most forward. Two rollers 18 and 19 that support the material G are pivotally supported at the rear portion of the base 20. Further, a control panel 21 is provided at the front of the machine.

FIG. 3 shows a front view of the control panel 21. On the panel is a 5-digit numerical display 22, A, B, C,
A group of pilot lamps 23 arranged in a matrix to indicate which of the set cutting length, set number of pieces to be cut, and total number of pieces to be cut is displayed on the numerical display 22 for each of the five types of cutting courses D and E, and numerical input. A keyboard 24 including a numeric keypad and a shift key, a cutting allowance setting device 25 for setting the saw blade cutting allowance (cutting amount), a power supply, automatic, saw blade on/off, saw frame up/down, and feed for manually operating the machine. Push buttons or select switch groups 26 for tightening/releasing the main vise, tightening/releasing the feed vise, etc. are provided at the front and rear of the table. The cutting allowance setter 25 described above is set to be equal to the cutting allowance that actually occurs when the saw blade is replaced or when the set amount decreases due to wear of the saw blade. 0.9 in the example
It is configured so that it can be set continuously in the range of mm to 1.5 mm.

FIG. 4 shows a block diagram of a control system according to an embodiment of the present invention.

The microcomputer 31 includes a random access memory (RAM) that stores various data such as the cutting length for each course and the number of pieces to be cut, a read-only memory (ROM) that stores control programs, and an arithmetic unit (ALU). It has a built-in control unit (CPU) that controls input/output and calculations. Output signals from the keyboard 24 of the control panel 21 for inputting numerical data for each course, the cutting distance setter 25, and the encoder 16 for converting the amount of displacement of the carriage into pulse signals are sent to the microcomputer 31 via an interface 32. is input. Numerical display 2
2. A main vice control device 33 that controls the hydraulic cylinder 6 of the main vice mechanism 3; a material feeding vice control device 34 that controls the cylinder 13 of the material feeding vice mechanism 10;
A saw frame control device 35 that controls the hydraulic cylinder for lifting and lowering the saw frame, a motor control device 36 that controls the saw wheel drive motor, and a carriage control device 37 that controls the hydraulic cylinder 27 of the carriage 9.
Each is controlled by a microcomputer 31 via an interface 32.

When you press the shift key marked "→" on the keyboard 24, the top of the A course of the pilot lamp group in the matrix arrangement, that is, the column for the set cutting length, lights up. When a numerical value is entered, the numerical value is displayed on the numerical display 22, and the random access
Stored in memory (RAM). Next, when you press the shift key marked "→" on the keyboard 24 again, the matrix-arranged pilot lamp lights up in the second course of A course, that is, the column for the set number of cutting pieces. Display and storage in random access memory (RAM) takes place. Since the lower row of the pilot random group shows the cumulative number of pieces to be cut, no input is required using the numeric keypad. By pressing the shift key marked "→" in succession, the illuminated display on the pilot lamp is moved to the top of the B course, that is, the set cutting length. You can move it to the next column. By repeating this operation sequentially and inputting the set cutting length and set number of pieces, A, B,
Programs can be set for each course of C, D, and E, and the set programs are stored in the RAM. The shift key marked "←" is used to reverse the order of the illuminated displays. While the program is being executed, the pilot lamp in the column for the cumulative number of pieces cut for the course being executed is lit, and at this time the numerical display 22 displays the total number of pieces cut.

The forward position of the carriage 9 is detected by the limit switch 17, and the backward positioning control outputs a stop command when the target value stored in the memory (RAM) and the measured value by the encoder 16 match, and stops just before the target value stored in the memory (RAM). This is executed by outputting a deceleration command at.

FIG. 5 shows a flowchart of a sequence control program according to an embodiment of the present invention. The calculation of the required feed distance L _O in step 41 is usually
To the set cutting length L _B set from the keyboard,
This is executed by adding the cutting allowance t set in the cutting allowance setting unit 25, that is, L _O =L _B +t. Next, in judgment step 41, it is determined whether the distance L _O to be sent is less than the maximum stroke L _S of the carriage, and L _O
If ≦L _S , proceed to step 43 and the material is
Only L _O is sent out. To explain the operation at this time in detail, the material feeding vise mechanism loosens, the carriage moves backward, and
When the retraction distance approaches L _O , a deceleration command is output, and when the retraction distance reaches L _O , a stop command is output. At this point, the material feeding vise mechanism tightens and clamps the material, and the main vise mechanism loosens. When the carriage moves forward and the limit switch is activated, the carriage stops and the main vice mechanism is tightened, completing preparations for cutting. In the cutting step 44, the saw wheel is driven to rotate, the saw frame is lowered, and cutting is performed.

When the judgment in judgment step 42 is "NO", the process proceeds to step 45, where the carriage moves backward by the maximum stroke L _S and conveys the material by L _S , and in 46, the remaining required feed distance L _{O is} calculated. (L _O −L _S ) is executed, the content of the required feed distance L _O is revised, and the process returns to decision 42 again. This loop of steps 45 and 46 is repeated as many times as necessary.

The retraction length measuring means of the present invention can be implemented using various known techniques. For example, as in the present invention, a pinion is provided on the shaft of a rotary encoder installed on a base, and the rotation speed of the rotary encoder is read by engaging it with a rack attached to a carriage, or a method of reading the rotation speed of the rotary encoder directly on the side of the material.
There is a method of pressing a touch roller with tires made of hard rubber or the like and reading the number of revolutions with an encoder. Moreover, as a material feeding method, instead of using the material feeding vise mechanism, the material may be fed by rotating two opposing vertical columnar rollers while strongly pressing them with a spring or the like.

According to this invention, the operator can calculate the amount of material to be fed, perform feeding operations according to the calculated value displayed by the built-in computer, and use a thickness gauge according to the cutting allowance. Moreover, regardless of the size of the cutting length relative to the maximum stroke of the material feeding vise, it is possible to always cut accurately to the automatically set cutting length, making the work easier. Not only has the burden on staff been significantly reduced, but it has also become possible to drive autonomously for long periods of time.

In addition, according to the present invention, since the cutting distance setting device is provided to arbitrarily and continuously set the cutting distance, it is possible to easily change the type of saw blade, replace the saw blade with a new one, and prevent wear of the saw blade. Even when the set amount changes due to the cutting length ( The machining accuracy of L _B =L _O -t) has been further improved.

[Brief explanation of the drawing]

Figure 1 is a basic conceptual diagram showing the configuration of the present invention, Figure 2
The figure is a plan view of the mechanical section of the embodiment of the present invention, and FIG. 3 is a side view thereof. Figure 4 shows the control panel 2 of the above embodiment.
1 is a front view of FIG. FIG. 5 is a block diagram of the embodiment of the present invention, and FIG. 6 is a flowchart showing a sequence control program of the embodiment of the present invention. 2...Saw frame, 3...Main vice mechanism, 9...
...Reciprocating carriage, 10... Material feeding vice mechanism, 14... Rack, 15... Pinion, 16... Encoder,
24... Keyboard, 25... Cutting margin setting device, 3
1...Microcomputer, 32...Interface.

Claims (1)

[Scope of utility model registration request] A saw blade is provided near a fixed vice mechanism that holds the material to be processed, and a material feeding vice mechanism is provided that can freely reciprocate in a predetermined direction with respect to the fixed vice mechanism, and this material feeding vice mechanism is used once or multiple times. A device that feeds and cuts the material to a predetermined length by reciprocating; a digital measuring device that converts the amount of displacement of the material feeding vise mechanism into a digital electrical signal; and a keyboard for inputting the cutting length. ; a cutting allowance setting device for arbitrarily setting the cutting allowance of the saw blade; a memory storing the cutting length entered from the keyboard; and the cutting length L _B stored in the memory and the cutting allowance setting described above. digital calculation means for calculating the material feeding target value L _O by adding the cutting distance setting value t by the tool; a comparison means for comparing the calculation result L _O with the maximum stroke L _S of the material feeding vise mechanism; In addition to inputting the output of the digital measuring device, based on the above comparison results, when L _O ≦ L _S , after one material feeding process of the material feeding vise mechanism with L _O as the target value, the material is transferred to the fixed vise mechanism. When the material is clamped and L _O > L _S , the maximum stroke L _S of the material feeding vise mechanism is 1 of the material feeding process.
A vise that clamps the material in the fixed vise mechanism after completing all of the material feeding processes in which the target value is the fraction of the material feeding distance obtained by subtracting the material feeding distance from the material feeding target value L _O by the material feeding process once or multiple times. 1. A material feeding control device for a saw machine, comprising: drive control means.