JPH06277924A - Cutting position deciding method in beveling machine - Google Patents

Abstract

PURPOSE:To remove the necessity of arrangedly providing the side of a supporting body with a stopper prescribing means composed of a rigid body for reducing the manufacturing cost of a whole device by releasing a clamping means on the side of a supporting body on one side after clamping a work through a supporting body on the other side, and movingly controlling a clamping means on the side of the supporting body on one side in a feed direction or a direction opposite to that. CONSTITUTION:A servomotor 2 is driven in the direction of positive rotation to move a supporting body 1a on one side backward, and when the first detecting switch Sa detects the tip of a flange (a), the servomotor 2 is stopped, and the movement of the supporting body 1a is therefore stopped. Next a clamping means E on one side is actuated to clampedly fix the flange (a) on one side in a work W, and the flange (a) is accurately set up at a cutting position based on a machining means G. Next, a clamping means F on the side of a supporting body on the other side is released, and the servomotor 2 is reversely driven. The work W is thereby advancingly transferred in a clamping state, and during transferring, the tip of a flange (b) on the other side in the work W is detected.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting and positioning system for a processing machine for groove-forming H-section steel. 2. Description of the Related Art H-section steel whose end face is cut into a slope or at a right angle is used as a structural material for construction. This structural material has an opening as shown in FIG. 7 in order to perform sound welding. Pre-processing is done. In short, a notch F having an arc-shaped back is formed at both joints of both side flanges a and b of the work W and the web c.
a, Fb (scalloping) are formed, and straight route surfaces Ra, Rb and chamfered chamfers Va, Vb (beveling processing) are formed at the ends of both side flanges a, b. As a processing machine for performing this groove processing,
Conventionally, the one proposed in Japanese Utility Model Laid-Open No. 186515/1988 is publicly known. This conventional apparatus is provided with a pair of supports on both sides of the work carrying-in path, and a clamp means for clamping the work and a cutting means for cutting the work are arranged on the supports, and further, the width and the tip of the work are arranged. In order to cope with the gradient, the front-back adjusting means is provided on one support side, and the left-right adjusting means is provided on the other support side. Then, in order to set the work at an appropriate cutting position, both support bodies are provided with abutting type stopper ruler means. Further, in this stopper ruler means, the amount of correction and the amount of correction to the work are set, and the appropriate route surface R is set.
The front and rear fine adjustment means for obtaining a, Rb and the chamfered surfaces Va, Vb are provided. There are various kinds of works to be subjected to the groove processing, from short and lightweight works to long and heavy materials weighing several tons. Therefore, the above stopper ruler means is required to have robustness corresponding to heavy materials,
It becomes extremely large. In addition, since each of them is provided with a fine adjustment mechanism for the front and rear, there is a problem that the configuration is complicated and the operation is troublesome, which causes a rise in cost and a decrease in workability as a whole. The present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to provide a new cutting and positioning system which can eliminate the contact ruler means and improve the operability. To do. To achieve the above object, the method adopted by the present invention is as follows. That is, the gist thereof is that the second end provided with the end of the work transferred by the carry-in conveyor on the other support side.
The first step of detecting by the detection switch and stopping or decelerating the carry-in conveyor by this detection signal. A second step of clamping the work by the clamp means on the other support side after the carry-in conveyor is stopped or decelerated. When one support side is moved in the feed direction or in the opposite direction to the feed direction and the end of the work is detected by the first detection switch provided on the one support side, the one support body is detected based on this detection signal. Third step of controlling the movement of the. A fourth step of clamping the work by the clamping means on the side of the one support after the movement of the one support is stopped. A fifth step of releasing the clamp means on the side of the other support after clamping the work by the one support, and controlling the movement of the side of the one support in the feeding direction or in the direction opposite to the feeding direction. A sixth step of controlling movement of one of the supports based on the detection signal when the second detection switch detects the end of the work. This is because there is provided a seventh step of clamping the work by the clamp means on the other support side after the movement of one support body is stopped. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The cutting and positioning system according to the present invention will be described below with reference to a specific configuration. 1 to 3 are operation explanatory views of a groove processing machine to which this method is applied, in which A conveys a work W from the front to the rear (up and down direction in the drawing) and to the processing machines Ba and Bb at the rear end. The carry-in conveyor M to be fed is a drive motor for driving the carry-in conveyor A. The processing machines B are 1a and 1b.
One and the other of the supports that form a and Bb, and a pair of these supports 1a and 1b are arranged on the left and right. One of the supports 1a located on the right side in the drawing is associated with the front-rear moving means C, and controls the movement of the supports 1a in the feeding direction of the carry-in conveyor A and in the direction opposite to the feeding direction. The above-mentioned back-and-forth moving means C is the servo motor 2
And a feed screw shaft 3 driven by the servo motor 2 and a passive nut 4 on the side of the support 1a screwed onto the feed screw shaft 3. Further, the left and right moving means D is associated with the other support 1b, and controls the movement of the support 1b in a direction orthogonal to the moving direction of the one support 1a. The left and right moving means D is composed of a servo motor 5, a feed screw shaft 6 driven by the servo motor 5, and a passive nut 7 on the side of the support 1b screwed to the feed screw shaft 6. E and F are one and the other of the supports 1a and 1b.
Clamping means provided respectively in the above, and is constituted by clamp pieces 8 and 9 that clamp the flanges a and b of the work W from the vertical direction. The clamp pieces 8, 9 are operated by hydraulic cylinders 10, 10 (see FIG. 4). G, H
Is a cutting means disposed on one and the other of the supports 1a and 1b at the rear position by the clamping means E and F. The cutting means G and H are equipped with a close-in cutter, a groove cutter, and a scallop cutter, The groove processing is performed on the work W by the feeding. Sa is a first detection switch composed of a limit switch arranged on the upper side of the one support 1a. The switch operating piece 11 is projected upward with respect to the work transfer path, and the tip of the flange a is abutted. Outputs a detection signal when touching. The detection switch Sa operates when the work W reaches the cutting position of the cutting means G. Sb is a second detection switch composed of a limit switch arranged on the upper side on the side of the other support 1b, and a detection signal when the switch operating piece 11 is projected upward with respect to the work transfer path and the tip of the flange b comes into contact with the detection signal. Is output. This detection switch Sb
Operates when the work W reaches the cutting position of the cutting means H. The above-mentioned switch actuating pieces 11, 11 correspond to the lower surface of the work W in a fixed position. (See FIG. 4) Further, it goes without saying that the detection switches Sa and Sb are not limited to the contact type switches described above, and non-contact type switches can be used. In this case, a reflective photoelectric switch in which a detection light beam is emitted upward is suitable. Further, these detection switches Sa and Sb can be fixedly arranged on the cutting means G and H. Se is a carry-in conveyor A and processing machines Ba and Bb.
The detection switch for detecting the tip of the work W during the interval controls the drive motor M to switch the loading speed of the work W from high speed to low speed. H is processing machine Ba, B
The carry-out conveyor J arranged at the rear of b is the other support 1
It is a connecting conveyor arranged between b and the carry-out conveyor H. Next, a control device for the servomotor 2 which controls the back and forth movement of the one support 1a will be described with reference to the block circuit diagram of FIG. The servo motor 2 has a speed detector 1
8 and the encoder 19 are connected. The rotation of the servo motor 2 is controlled by a drive controller 26 including a moving position setter 20, a pulse generator 21, a deviation counter 22, a D / A converter 23, a differential amplifier 24, and a power amplifier 25. The support 1a moves. The operation signal necessary for controlling the servomotor 2 is given to the movement position setter 20 as a predetermined program by the operation panel 27 and the detection switches Sa and Sb. The position register 28 counts up or down the pulse from the encoder 19 according to the moving direction of the one support 1a, that is, the rotating direction of the servo motor 2, and monitors the current position. The structure of the processing apparatus according to the embodiment is as described above, and the groove processing of the work W is performed as follows. In sending the work W to the processing machines Ba and Bb, first, the other support 1b is laterally moved by the servomotor 5 so that the left-right interval is adapted to the width of the work W.
In the figure, one support 1a is the other support 1a.
Although it is directly facing b, there is no problem even if it is waiting at the rear position where there is a space with the carry-in conveyor A. In addition to the gradient material shown in the figure, the work W may be a steel material having a right end. In the above state, the carry-in conveyor A is driven and the work W is transferred backward. When the work W is a gradient material, the one flange a precedes the transfer as shown in FIG. When the flange a is detected by the detection switch Se during the transfer, the drive signal M of the carry-in conveyor A is switched from the high speed to the low speed by the detection signal. As a result, the work W is transferred backward at a sufficiently slow speed and then enters the processing machines Ba and Bb. First, the work W enters the one support 1a side, and the first detection switch Sa detects the flange a, but no operation occurs due to this detection signal. However, when the flange b enters the other support 1b and its tip is detected by the second detection switch Sb, the drive motor M is stopped by this detection signal and the transfer of the work W is stopped. Then, the clamp means F operates to clamp and fix the other flange b. Here, the work W is a detection switch S.
It is desirable to fix the position b so as to match the detected position, but it is unavoidable that an error occurs due to an overrun due to inertia, a positional shift due to a clamp, or the like. This error amount is always different depending on the size of the work W and the like. When the flange b on one side is clamped, the servo motor 2 is driven in the forward rotation direction to move the one support 1a rearward in the illustrated example. This support 1
When the first detection switch Sa detects the tip of the flange a by the movement of a, the servo motor 2 is stopped by the detection signal, and the movement of the one support 1a is stopped. When the drive-in cutting shown in FIG. 6 (the drive-in amount is indicated by a symbol m) is performed on the tip of the flange a, the servo motor 2 is reversely driven this time after the detection signal is output. The reverse rotation amount of the servo motor 2 at this time is measured by the encoder 19, and the servo motor 2 is stopped when the set value corresponding to the drive-in amount matches the rotation amount. Controlled. It should be noted that the above-mentioned drive-in amount is input and set in advance in the movement position setting device 20 by the keyboard of the operation panel 27 while considering the correction amount and the like. The feeding operation of the one support 1a by the servo motor 2 is performed at a speed at which sufficient positioning accuracy can be obtained. When one support 1a is stopped, one clamp means E is operated to clamp and fix one flange a on the work W. By the above operation, the one flange a is accurately set at the cutting position by the cutting means G. When this setting is completed, the clamp means F on the side of the other support 1b is released, and then the servo motor 2 is driven in the reverse direction. The work W is moved forward in a clamped state by the operation of the servo motor 2, and the tip of the other flange b of the work W is detected by the second detection switch Sb during the movement. The servo motor 2 is stopped by this detection signal, and the work W by the one support 1a
Movement stops. When the end of the flange b is subjected to the follow-up cutting (shown by the reference numeral n) in FIG. 6, the servo motor 2 is further driven in the reverse direction after the detection signal is output. The rotation amount of the servo motor 2 at this time is measured by the encoder 19. When the set value corresponding to the drive amount and the rotation amount match, the servo motor 2 is stop-controlled. It should be noted that the above-mentioned drive-in amount is input and set in advance to the movement position setting device 20 by the operation panel 27 in consideration of the correction amount and the like. The transfer operation of the one support 1a by the servo motor 2 is performed at a speed at which sufficient positioning accuracy can be obtained. When the support 1a is stopped, the other clamping means F is subsequently operated to clamp and fix the other flange b of the work W. By the above operation, the other flange b is set at the cutting position of the cutting means H. In this way, cutting means G for both flanges a, b,
Once the position of H is determined, rotate each cutter,
And give rise feed to these. As a result, the work W is subjected to the required groove processing and scallop processing. When the groove processing is completed, the other clamping means F is released, and the servo motor 2 is driven in the normal direction at high speed. By this drive, the one support 1a is moved rearward, and the clamped work E moves the clamped work W backward together. The other flange b is placed on the connection conveyor J as the support 1a is transferred to the rear side. (See FIG. 3) Then, when one support 1a reaches the transfer end, one clamp means E
To release. As a result, the work W is transferred to the carry-out conveyor H.
To be delivered to the rear. When the unloading of the work W is completed, the servo motor 2 is reversely rotated at a high speed to return one support 1a to the standby position in FIG. 1, and both cutting means G and H are returned to the lowered position to move to the next work. Be prepared to carry in W. The above is one processing cycle operation. When the next work W is the same as that described above, one support 1a may be returned to the vicinity of the position shown in FIG. Although not particularly described in one embodiment, a large space is provided between the support body 1a and the carry-in conveyor A and between the support body 1a and the carry-out conveyor H with the movement of the one support body 1a. It creates a gap. Therefore, when there is a risk of dropping the work W, it is possible to dispose an extendable connecting conveyor between the two. As described above, according to the cutting and positioning method of the present invention, it is not necessary to dispose the stopper ruler means made of a rigid body on the support side. Further, it is not necessary to adjust the ruler means back and forth to set the cutting position. Therefore, the structure is simplified, and the cost of the entire apparatus can be reduced, which is an excellent effect. Further, operability can be improved and smooth work can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an operation explanatory view of a groove processing machine for explaining a cutting positioning method according to the present invention. FIG. 2 is also an operation explanatory diagram. FIG. 3 is likewise an operation explanatory view. FIG. 4 is a front view showing a configuration of a groove processing machine. FIG. 5 is a control block diagram applied to the positioning method of the present invention. FIG. 6 is an explanatory view showing a groove processing shape. FIG. 7 is a perspective view of a work subjected to groove processing. [Explanation of Codes] A carry-in conveyor B drive motor 1a one support 1b other support C back-and-forth moving means 2 servo motor E clamping means F clamping means W work a one flange b other flange G cutting means H cutting means Sa 1st detection switch Sb 2nd detection switch 11 Switch actuation piece Se Detection switch H Carry-out conveyor J Connection conveyor 19 Encoder 20 Moving position setter 27 Operation panel

Claims (1)

Claims: A pair of left and right support bodies are arranged at the end portions in the feed direction of a carry-in conveyor for loading a work, and these support bodies are provided with clamping means and cutting means, respectively, and one of the support bodies has a feed direction. In a groove processing machine in which the front-rear moving means in the same direction is associated with the left-right moving means orthogonal to the feed direction on the other support side, the end of the work transferred by the carry-in conveyor is provided on the other support side. The first step of detecting by the second detection switch and stopping or decelerating the carry-in conveyor by this detection signal. A second step of clamping the work by the clamp means on the other support side after the carry-in conveyor is stopped or decelerated. When one support side is moved in the feed direction or in the opposite direction to the feed direction and the end portion of the work is detected by the first detection switch provided on the one support side, the one support body is detected based on this detection signal. Third step of controlling the movement of the. A fourth step of clamping the work by the clamping means on the side of the one support after the movement of the one support is stopped. A fifth step of releasing the clamp means on the side of the other support after clamping the work by the one support, and controlling the movement of the side of the one support in the feeding direction or in the direction opposite to the feeding direction. When the second detection switch detects the end of the work,
A sixth step of controlling movement of one of the supports based on the detection signal. A seventh step of clamping the work by the clamp means on the side of the other support after the movement of the one support is stopped. A cutting and positioning method in a groove processing machine, characterized by comprising the above steps.