JPH05329801A - Cutting stroke setting device of running circular saw disc - Google Patents

Abstract

PURPOSE:To eliminate a wasteful time and to perform efficient cutting processing by obtaining the cutting start position of a circular saw suitable for the length of a processing material. CONSTITUTION:A detection switch SW detecting the presence of a processing material W is provided on the saw stand reciprocally running along a guide rail. The forward and reverse rotation control of the drive motor 27 driving the saw stand and the confirmation of the end part (other end) of the processing material W are performed on the basis of the detection signals of the 'presence' and 'absence' of the processing material of the detection switch S. A running quantity detection means CD detecting the running quantity of the saw stand from the other end of the processing material in one end direction and a running quantity measuring means CO measuring the running quantity of the saw stand from one end of the processing material in the other end direction are provided and the outputs of both means CD, CU are compared by a comparison means 40. The running position of the saw stand is set and controlled on the basis of the comparison result.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cutting of a traveling circular saw which enables efficient cutting by setting a circular saw at a cutting start position quickly. The present invention relates to a stroke setting device. 2. Description of the Related Art For the purpose of cutting large plates, there are running circular saws called running saws and panel saws. In this type of processing machine, as shown in the explanatory view of FIG. 7, one end of the circular saw S is moved to the traveling base point P (lower end) prior to cutting.
From the cutting start point Q
, The circular saw S is projected onto the table at this position, and then the circular saw S is moved downward to perform the required cutting work, and one cutting cycle is completed. By the way, the cutting stroke of the circular saw is always different depending on the processed material, and it is necessary to adjust the cutting start point Q manually. Therefore, the present inventor has proposed a cutting device that does not require this troublesome adjustment operation and automatically obtains a cutting stroke according to the length of the processed material. (See Japanese Patent Publication No. 61-21121) [0004] In this conventional cutting device, a circular saw stands by at a traveling base point P at the lower end after processing is completed. When the processed material is supplied, the ascending operation is started for the first time, and the upper end detection position of the processed material is reached. Therefore, the following problems are pointed out when the operation is analyzed in the light of actual work. That is, the worker is to make a ruler surface R in accordance with the ordinary law.
The processed material m is supplied to and is laterally moved to perform cutting positioning. Then, the clamp means is operated by an appropriate switch such as a foot switch to fix the work material to the work table. By doing this, after that, the circular saw protrudes to the work table after a predetermined time elapses in conjunction with the operation of the clamp means.
Then, the circular saw is moved in the descending direction. According to a skilled worker, the above operation is almost instantaneously performed. However, according to the conventional apparatus, as the work material is supplied, as described above, the raising of the circular saw is started. Therefore, when the work material is long, the circular saw cuts at the cutting start point Q during the above operation time. Has not reached. Therefore, useless waiting time occurs before the start of cutting. On the other hand, when the cutting process is completed, the clamping means is automatically released, so that the worker processes the processed product and the residual material, and then supplies the next processed material to the work table. The above work is the most labor intensive and takes a lot of time. However, during this time, the circular saw is waiting at the lower end. As described above, in the conventional processing apparatus, the timing of the raising / lowering operation of the circular saw is poor, and there is a problem in improving the work efficiency. The present invention has been made by paying attention to the above-mentioned problems of the prior art, and it is possible to perform a working operation efficiently by predicting the length of the next processing material and setting the saw blade position. It is intended to provide a cutting stroke setting device capable of performing the above. Here, the present invention has been made paying attention to the situation of actual work in which the same dimension material is often repeatedly cut. In order to achieve the above object, the device according to the present invention is configured as follows. That is, the gist of the invention is to provide a saw stand that reciprocates in the guide rail direction by the drive means, to equip this saw stand with a circular saw, and to provide a work table corresponding to the guide rail, In a processing machine that attaches a processed material based on the above, and cuts the processed material from the other end toward one end, a detection switch for detecting the presence or absence of the processed material is provided on the saw stand side. Rotation control of the driving means and detection of the other end position in the processed material are performed, and further, traveling amount detection means for detecting the traveling amount of the saw stand from the other end detection position to the one end direction is provided. The travel amount of the saw blade from one end to the other end is set on the basis of the output of. In the state where the work material is being supplied, when the detection switch detects "existence" of the work material, the saw stand is controlled to move toward the other end of the work material. Then, when the detection switch detects the “present” → “absent” state of the workpiece, the end of the workpiece is confirmed and the position of the saw stand is set. When the detection switch detects "absence" of the processed material, the saw base is controlled to move toward one end of the processed material. And the detection switch is "no"
→ When detecting the "existence" state, the edge of the workpiece is confirmed and the position of the saw stand is set. As described above, by moving the saw stand after confirming the position of the other end of the processed material, a cutting stroke according to the length of the processed material can be obtained. Since the one end position of the processed material is always constant, it is possible to detect the amount of movement of the saw table by the distance or time until the processing is completed. Therefore, when the saw table travels from the one end to the other end after the cutting process is completed, the movement amount can be set based on the detection amount. If the saw stand is stopped when both movement amounts become the same, the cutting start position of the circular saw can be set appropriately by predicting the next processed material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the cutting stroke setting device according to the present invention will be specifically described below. 1 is a perspective view of a panel saw equipped with this device, and FIG. 2 is a rear view of the same.
FIG. 3 also shows a side view, and A is a main body frame 3 which is composed of a rear frame 1 having a substantially trapezoidal shape in a side view and a slightly inclined frame-shaped front frame 2. A front frame of the front frame 2 is attached to a main body frame 3. Work Table The work table 3 is divided into right and left by a blade plate 4 arranged in the center. Further, the blade plate 4 is divided into left and right by a saw traveling slit 5 at the center. A mounting ruler plate 6 is attached to the lower portion of the front surface side of the work table 3. The mounting ruler plate 6 is disposed horizontally orthogonal to the slit 5 for saw travel. Reference numeral 7 is a guide rail having an H-shaped cross section, which is supported on the upper and lower horizontal bones 1a and 1b of the rear frame 1 and is disposed on the back side of the work table 3. The guide rail 7 has an appropriate gap with the saw traveling slit 5. Install in parallel. Reference numeral 8 is a traveling base provided on the guide rail 7 so as to be able to move up and down, and the cutting unit B shown in FIGS. 4 and 5 is mounted on the traveling base 8. In addition, the running base 8
The cutting unit B will be generically referred to as a saw stand hereinafter. Reference numeral 9 denotes a motor 11 mounted on the traveling base 8 with the rotary shaft 10 horizontal, and an arm 13 that is rotatable by a bearing 12 concentric with the rotary shaft 10. An arm 13 has a bearing tube provided at the free end of the arm 11. A horizontal saw shaft 14 is rotatably supported on the bearing cylinder 13. A circular saw shaft 15 is attached to one end of the saw shaft 14 via a flange 16. The circular saw shaft 15 is positioned corresponding to the saw traveling slit 5. There is. Reference numeral 17 is a pneumatic cylinder for operating the circular saw 15 to move in and out of the work table 3. The pneumatic cylinder 17
Connects the tip of the piston rod 17a to a passive piece 18 fixed to the arm 11. The pneumatic cylinder 17 includes a piston rod 17
When a is extended, the circular saw 15 is projected onto the work table 3, and when retracted, the circular saw 15 is immersed in the work table 3. 19 is a pulley 20 fixed to the saw shaft 14 and a pulley 21 fixed to the rotary shaft 14 and a transmission belt 22 is a circular saw 15
The dust collecting cover 23, which is provided so as to cover the outer peripheral portion of the dust collecting cover at the retracted position, is a dust outlet provided at one end of the dust collecting cover 22. The dust collecting cover 22 is fixedly provided on the traveling base 8. Next, E is a drive means for driving the saw stand in the ascending / descending direction, and 24 and 25 are a pair of sprockets 26 provided at the upper and lower ends of the guide rail 7, respectively.
This chain 26 is attached to the traveling base 8 at one end thereof. 27 is a forward / reverse type drive motor connected to the lower sprocket 25 through an appropriate speed reducing means. The drive motor 27 is rotationally controlled by an electric control means described later. The driving means E may be replaced with a known means other than the structure of the feed screw shaft arranged in the direction of the guide rail 7 and the passive nut on the saw stand side screwed to the feed screw shaft. Reference numeral F denotes a pressing means for clamping the work material W on the mounting ruler plate 6 on the work table 3, and reference numeral 28 denotes a U-shaped mounting frame in a side view, which is arranged on the front side corresponding to the blade plate 4.
The lower end of the mounting frame 28 is fixed to the work table 3 via a slit cover 28a, and the upper end is fixed to the work table 3 via a stay 29b. 31 and 31 are mounting frames 28
An L-shaped link arm 32 rotatably disposed by supporting shafts 30 provided above and below is a pressing plate attached to one end of both link arms 31, 31. The pressing plate 32 is the slit for saw running. Corresponding to No. 5, it is arranged at the front. Reference numeral 33 denotes a cushion pad 34 provided at a contact portion with the work material W. A connecting rod 35 connects the other ends of both link arms 31 and 31, and a connecting rod 35 links a piston rod 35a to the other ends of the link arms 31 and 31. Pneumatic Cylinder This pneumatic cylinder 35 is mounted downward on the top of the mounting frame 28. Press plate above
When the piston rod 35a contracts, 32 moves closer to the work table 3 and clamps the workpiece W. When the piston rod 35a is extended, the piston rod 35a is separated from the work table 3 to release the clamp. In the present invention, in addition to the above-mentioned mechanical constitutions, the following electrical control means and switch means for operating this control means are provided. Then, the up / down control of the saw stand by the drive motor 27 is performed by these. First SW
Is a detection switch for the processed material W which is fixed to the lower side of the dust collecting cover 22 by approaching the circular saw 15. The detection switch SW is composed of a reflection type photoelectric switch, and passes forward through the gap of the saw traveling slit 5. Irradiate a light beam for detection. When the irradiation light is reflected by the workpiece W, the detection switch SW
Receives this, and detects the “present” state of the processed material. When there is no reflection, the "absence" state of the processed material is detected. When the foot switch FS is operated while the work material W is being supplied to the work table 3, if the detection switch SW is in the "present" state, the drive motor
27 rotates in the positive direction and moves up the saw stand. When the detection switch SW changes from “with” to “without” the work material as the saw stand rises, the drive motor 27 stops. The position of the upper end (the other end) of the processed material W is confirmed by the change in the detection state of the detection switch SW. When operating the foot switch FS,
If the detection switch SW is in the "absent" state, the drive motor 27 rotates in the reverse direction to drive the saw stand downward. When the detection switch SW changes from the work material “absence” to “presence” as the saw stand descends, the drive motor 27 stops rotating. The position of the upper end (the other end) of the processed material W is confirmed by the change in the detection state of the detection switch SW. In order to eliminate the variation in the accuracy of the stop position of the saw stand, the drive motor 27 is rotated in the forward direction again from the above stop position so that the detection switch SW has the work material “exist” →
When the "None" state is reached, stop the drive motor U
You may control the turn. The above-mentioned detection switch detects the processed material W located in the saw traveling slit 5, but the blade plate 4 is made of a transparent plate, or the blade plate 4 or the work table 3 is used. If the slit holes are provided in the vertical direction, it is possible to detect the processed material W in a portion other than the above. Although only one detection switch SW is provided, it is also possible to arrange two detection switches SW close to each other in the ascending / descending direction and thereby control the rotation of the drive motor 27. That is, when both detection switches are “present”, the drive motor 27 is driven in the normal direction. The drive motor 27 is stopped when one of the detection switches is “present” and the other detection switch is “absent” as the saw stand is raised. When both are "none", the drive motor 27
Drive in reverse. When one of the detection switches is “present” and the other detection switch is “absent” as the saw stand descends, the drive motor 27 is stopped. By doing so, the saw stand position can be set without requiring U-turn control. Next, in the control block diagram of FIG.
Is an incremental encoder provided on the rotary shaft of the drive motor 27.
A pulse proportional to the rotation angle of is output. LS is a limit switch CD that detects when the saw blade reaches the lower end position.
Is a counter type traveling amount detecting means for detecting the lowering amount of the saw stand by inputting the other end detection signal of the processed material by the detection switch SW, the lower end arrival signal of the saw stand by the limit switch LS and the pulse signal of the encoder PG. is there. The CU inputs the detection signal of the limit switch LS and the pulse signal of the encoder PG, and the counter type traveling amount measuring means 40 for detecting the rising amount of the saw stand is the traveling amount detecting means CD and the traveling amount measuring means CU. The comparison means 41 for comparing the outputs of the drive motor 27
Is a control means for controlling the rotation of the. The control means 41 stops the drive motor 27 when the output of the comparison means is "0", that is, when the descending amount and the ascending amount of the saw stand become equal. The construction of the traveling circular saw board according to one embodiment is as described above, and the efficient cutting process is performed as follows. The description will proceed assuming that the saw stand was initially in an indefinite position. That is, first, the processed material W is supplied onto the mounting ruler plate 3, and this is appropriately laterally moved to determine the cutting position. This position determination is performed by the contact ruler 36 of FIG. When the setting of the work material W is completed, the operator operates the foot switch FS to proceed to the next process. In this way, the pressing plate 32 operates toward the work table 3 and clamps the workpiece W. On the other hand, the detection switch SW provided on the saw stand detects the presence or absence of the processed material W. When the length of the work material W is larger than the current position of the detection switch SW, the detection switch SW indicates that the work material is “present”.
Output the detection signal, the drive motor 27 rotates in the normal direction and the saw stand rises. This ascending movement is stopped when the detection switch SW detects "presence" → "absence" of the work material. When the position of the saw stand is set in this manner, the circular cylinder 15 is projected onto the work table 3 by the pneumatic cylinder 17, and the drive motor is
27 reverses and the saw stand moves downward at a predetermined feed rate.
The workpiece W is cut from the other end toward one end by the traveling of the saw table. When the length of the work material W is smaller than the current position of the detection switch SW, the detection switch SW outputs a detection signal of "no work material", so that the drive motor 27 reverses and the saw stand To descend. This lowering operation is stopped when the detection switch SW detects “absent” → “present” of the processed material. Then, after this, cutting processing is performed by the same operation as described above. In the case of a small processed material, the circular saw 15 immediately projects by the initial "absence" detection signal of the detection switch SW, and the descending operation is continued regardless of the "absence" → "presence" detection signal. This may be done, and by doing so, the cutting work can be speeded up. The descending movement of the saw stand is stopped when the saw stand reaches the lower end to finish cutting and operate the limit switch LS. By the detection signal of this limit switch LS, the circular saw 15 is set in the working table 3 and the pressing plate 32 is pressed.
Releases the clamp. Therefore, the worker waits for this and processes the cut work material W into a product and a residual material, and further supplies the next work material W to the work table 3. The following operation is performed on the electric control means side during this work. That is, the running amount detecting means CD is limited from the detection of the other end of the processed material W by the detection switch SW, that is, from the time when the detection signal of the detection switch SW is output "absent" → "present" or "present" → "absent". The pulse signal of the encoder PG until the lower end of the saw stand is reached by the switch LS is counted, and the downward traveling amount of the saw stand is measured. At the descending end, the saw base is sequence-controlled so as to immediately move up by the reverse rotation of the drive motor 27. During this ascending travel, the running amount measuring means CU uses the limit switch LS. The pulse signal output from the encoder PG is counted after the lower end of the saw stand is detected. This pulse output signal is compared with the pulse output signal at the time of falling by the comparison means 40. When there is a difference in the output signals, the saw stand continues to rise, but when the difference becomes "0", that is, when both running amounts become equal, the control means 41 causes the drive motor 27 to stop rotating. Output a signal. As a result, the saw stand is set to the cutting start position of the previous work material W. Since the position setting operation of the saw stand described above is performed while the operator is processing the processed material, a waiting time does not occur in performing the next cutting processing. In the above-mentioned embodiment, the descending traveling amount and the ascending traveling amount of the saw base are pulse counted and compared, and the ascending position of the saw base is controlled by the result. It is also possible to measure the time, set the rising time of the saw stand based on this value, and control the position. In this case, when the descending speed and the ascending speed are different, it is necessary to appropriately correct. In one embodiment, the running amount is detected by using the incremental type encoder, but an absolute type encoder may be used. By doing so, the limit switch LS for detecting the lower end of the saw stand is detected.
Can be omitted. Further, in one embodiment, the detection switch SW is mounted on the lower side of the circular saw 15, but it may be mounted on the upper side as in the known example. Further, if the electric light (indicator lamp) is attached in close proximity to the detection switch, the protruding position of the circular saw can be always checked, so that safe work can be ensured. In one embodiment, the work material W supplied to the work table 3 is artificially confirmed to be set at the cutting position and the foot switch FS is used to start the cutting work. If equipped with automatic transport, this artifact must be removed. Therefore, in the latter case, whether or not the processed material W is set at the cutting position is confirmed by the detection switch. This detection switch should be installed in a suitable place on the machine side. As described above, according to the cutting stroke setting device of the present invention, it is possible to obtain an excellent effect that the cutting process can be performed with the minimum traveling stroke corresponding to the length of the processed material. Be done. In addition, in addition to this, the saw stand can be moved in advance and set to the cutting start position to wait for the next processing, so that the work can be performed efficiently and in good timing with no dead time. The effect is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a traveling circular saw equipped with a cutting stroke setting device of the present invention. FIG. 2 is a rear view of the traveling circular saw board. FIG. 3 is a side view of the traveling circular saw board. FIG. 4 is a partially vertical front view showing the configuration of a saw stand. FIG. 5 is a plan view of the same. FIG. 6 is a block diagram showing a configuration of electric control means. FIG. 7 is an explanatory diagram showing a cutting processing cycle. [Explanation of Codes] 3 Working Table 4 Blade Plate 5 Saw Travel Slit 6 Mounting Ruler Plate 7 Guide Rail 8 Traveling Base B Cutting Unit 15 Circular Saw E Drive Means 22 Dust Collection Cover 27 Drive Motor 32 Press Plate SW Detection Switch FS Foot switch W Worked material PG Encoder LS Limit switch CD Travel amount detecting means CU Travel amount measuring means 40 Comparison means 41 Control means

Claims (1)

What is claimed is: 1. A saw base, which reciprocates in the guide rail direction by drive means, is provided, the saw base is provided with a circular saw, and a work table is provided corresponding to the guide rail. One end of the work table is used as a reference. In a processing machine that attaches a processed material as a workpiece and cuts the processed material from the other end toward one end, a detection switch for detecting the presence or absence of the processed material is provided on the saw base side, and the rotation control of the drive means is performed by the detection signal. And the other end position of the processed material is detected, and a traveling amount detecting means for detecting the traveling amount of the saw table from the other end detecting position to the one end direction is provided, and based on the output of the traveling amount detecting means. A device for setting a cutting stroke of a traveling circular saw disk, which is configured to set a traveling amount of a saw stand from one end to the other end.