JPH0242623B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for positioning a drill unit in a drilling machine for section steel, and in particular for positioning a rivet hole to be drilled in a section steel such as an H section steel or a channel section steel. The present invention relates to a positioning method when moving a drill unit to a certain position.

``Prior Art'' In general, a drilling machine for shaped steel has an inverted U-shaped moving frame that can move within a predetermined range in the longitudinal direction of the shaped steel (hereinafter referred to as the X-axis direction). There is. The movable frame is equipped with a first drill unit and a second drill unit for drilling rivet holes in each flange of the section steel so as to be movable in the height direction (hereinafter referred to as the Z-axis direction), Further, a third drill unit for drilling rivet holes in the wave of the section steel is provided so as to be movable in the distance direction between the flanges of the section steel (hereinafter referred to as the Y-axis direction). A plurality of rivet holes are then drilled at both ends and at the center of the shaped steel, but usually the positions of the rivet holes often exhibit the same or symmetrical pattern at both ends and at the center of the shaped steel. When a rivet hole is drilled in the center of a shaped steel, it can be cut at the center and used as two shaped steel. When drilling holes, it is necessary to clamp the section steel at a predetermined position within the machine body, and to move and position the drill unit to the position where the rivet hole in the clamped section steel is to be drilled.

"Problems to be Solved by the Invention" However, in the conventional positioning method, there is currently only one origin that serves as a reference for positioning, and the origin is fixed at a predetermined position. For this reason, in conventional positioning, even if the drilling patterns at both ends and the center of a section steel are the same and symmetrical, each drilling operation at both ends and the center should be performed. The holes must be drilled sequentially only from one direction close to the predetermined origin of the position pattern. Therefore, when drilling one end of a shaped steel, align the end face with the origin of the drill unit, determine the position of the rivet hole to be drilled based on the origin, and
Drilling can be performed by moving the movable frame and drill unit to position the drill unit at the determined rivet hole position, but the data regarding the same rivet hole position can be used as is to locate the other end and center of the section steel. When aligning holes to be drilled, first select one of the rivet hole positions in the position pattern so that the holes can be drilled according to the position pattern to be drilled, and then set After placing a mark such as a scribe line at the position and positioning the mark and the origin of the drill unit, the drilling operation must be performed according to the position pattern of the riveted hole. That is, one origin is set only at the left end of the movable range of the drill unit, and as shown in FIG. 7, the left end region 52 of the shaped steel 51 and the right half 53b of the center region have the same position pattern However, the right end region 54 of the shaped steel 51 and the left half 53a of the center region often have a position pattern symmetrical to that described above. For this reason, two types of position patterns must be prepared, or the operator must determine the position of the rivet hole each time for the other symmetrical position pattern, position the drill unit, and then perform the drilling work. Therefore, in the former case, two types of position patterns are required, which causes troublesome programming and an increase in the storage capacity in the control device, and in the latter case, an excessive labor burden is placed on the workers, resulting in poor workability. There are some drawbacks. Furthermore, in any of the above,
During drilling work, when drilling in the left end area 52, the left end of the shaped steel 51 is aligned with the origin of the movable range of the drill unit (the reference position for control operation), but the left half of the other center In order to drill into the right half areas 53a, 53b and the right end area 54, it is necessary to add marking lines 55 to 57 to align with the origin of the movable range of the drill unit. Since there are a large number of sheets to be attached, the setup work for the workers is cumbersome and requires a great deal of labor. In particular, when attaching the marking line 55 necessary for drilling the left half region 53a of the center, the section steel 5
Currently, the dimensional position is determined based on the marking line 56 necessary for drilling in the right half region 53b attached between the left end and the right end of 1, and the marking line 55 and Even if the dimensional error is within the allowable range when attaching the marking line 56 based on the marking line 55, when setting the marking line 56, the permissible dimensional error of the marking line 55 and the tolerance of the marking line 56 must be considered. This results in an even larger dimensional error, and as a result, the shape steel 5
There is a problem in that the position where the marking line 56 is attached with respect to the left end of the hole 1 has a dimensional error that exceeds the allowable range, which often causes a deviation in the drilling position.

Therefore, the present invention was made in view of the above circumstances, and when positioning a plurality of rivet holes etc. drilled at both ends of a shaped steel, the left origin or the right origin at both ends of the movable range of the moving frame, and the left and right origins of the shaped steel. If drilling is performed based on the left end or right end surface, and if multiple rivet holes are to be drilled at appropriate locations other than the center or both ends of the section steel, the holes should be drilled. By aligning the center of the rivet hole position pattern with the center origin, the work can be divided to the left and right around the center origin, which improves workability and machining accuracy, and eliminates the drawbacks of conventional methods. The object of the present invention is to provide a method for positioning a drill unit in a steel drilling machine.

"Means and Effects for Solving the Problems" In order to achieve the above object, the present invention provides a method for moving a movable frame that moves along the longitudinal direction of a section steel fixed in the fuselage body, to the left near both ends of the movable range of the movable frame. An origin and a right origin are set, and a center origin is set between the left origin and the right origin. When drilling into the left end of a shaped steel, align the left end surface of the shaped steel with the left origin, and when drilling into the right end of the shaped steel, align the right end surface of the shaped steel with the right origin, and then When drilling a hole in the center of a shaped steel, the center origin is aligned at a predetermined position in the center of the shaped steel. To position the drill unit at the left origin or right origin, which serves as the reference for the drilling position, first, the drill unit must move the moving frame that is located at a free position other than the left or right origin once beyond the left or right origin. After that, the drill unit is moved at low speed until it is located at the left origin or right origin. Next, to position the drill unit at the center origin, move the moving frame from the drill unit at high speed until it passes the left or right origin in the same way as above, and then position it at low speed to the left or right origin. Further, the moving frame is moved at high speed from the left or right origin until the drill unit reaches a position in front of the center origin, and then the moving frame is moved at low speed until the drill unit is located at the center origin. At this time, the drill unit is positioned at the center origin while measuring the moving distance from the left or right origin. The drill unit moves the movable frame and the drill unit so that the drill unit is located at a preset position of a rivet hole to be drilled with reference to the left origin, right origin, or center origin.

Embodiment An embodiment of the method for positioning a drill unit in a section steel drilling machine according to the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of a section steel drilling machine incorporating this method. The drilling machine for shaped steel has drill units 2 to 4 dedicated for drilling rivet holes in the wave and both flanges of the shaped steel 1,
The drill units 2 to 4 are installed on a movable frame 8, and the movable frame 8 is suspended via a rail guide 7 on a gate-shaped frame 6 erected on a base 5, as shown in arrow A in FIG. As shown, each of the drill units 2 to 4 is movable together with the movable frame 8 along the longitudinal direction (hereinafter referred to as the X-axis direction) of the section steel 1 inserted into the machine body. Each drill unit 2, 3 is mounted on a moving frame 8 so as to be movable in the height direction (hereinafter referred to as the Z-axis direction). The drill unit 4 is movable in a direction perpendicular to the longitudinal direction of the shaped steel 1, that is, in the distance direction between the flanges of the shaped steel 1 (hereinafter referred to as the Y-axis direction), but the return-to-origin operation of the present invention There is no direct engagement with each other, and each of the drill units 2 to 4 moves simultaneously in the longitudinal direction of the shaped steel 1 together with the movable frame 8, thereby performing a return-to-origin operation. Drill tool 13 of drill units 2 to 4
are arranged in a straight line within one plane in the Y-axis direction. Therefore, for convenience of explanation, the method for returning the drill unit 2 to the origin will be described below. As shown in FIG. 1, the drill unit 2 can be moved within a fixed movable range l by the operation of a hydraulic cylinder or the like. The moving position of the drill unit 2, that is, the moving position of the moving frame 8, is measured by a rotary encoder. Within the movable range l, the left to right origins O ₁ , O ₂ and the center origin O ₃ are set, and when the drill unit 2 crosses the left to right origins O ₁ , O ₂ , the limit switch LS operates, and the drill When unit 2 is located at the left or right origin O ₁ , O ₂ ,
A Z signal as a positioning signal is output from the rotary encoder and supplied to a microcomputer in a control panel 9 or an operation panel 10 as a control device. The left origin O ₁ is
The moving frame 8 is set near the left end of the movable range, and the right origin _O2 is set near the right end of the movable range l. In the illustrated example, the center origin _O3 is set at the center between the left origin _O1 and the right origin _O2 , and is stored in advance in the microcomputer as a distance from the left origin _O1 . center origin
Of course, O ₃ can be set as a distance from the right origin O ₂ . The position of the rivet hole can be input into the control device with reference to each origin: a left origin O ₁ , a right origin O ₂ , and a center origin O ₃ .

First, the return operation of the left origin O ₁ will be explained based on FIG. 2. In step 1, the left origin O ₁
Start 1 the return of drill unit 2 to . In step 2, the operation panel 1 shown in FIG.
When the left origin automatic return button switch PB of 0 is pressed, it is determined whether the control device is turned on or not. ON
If not, the drill unit 2 has already returned to the left origin O ₁ and has been adjusted, so return
Proceeding to RET, preparations are made for the next positioning dimension control operation and drilling control operation. If the left origin automatic return button switch PB is turned on, drill unit 2
is located at a free position in the movable range l other than the left origin O ₁ and has not been returned to the left origin O _1. In order to perform the return operation, the next step 3 is performed.
Proceed to. In step 3, it is determined whether the return in the X direction has been completed. The X direction refers to the moving direction of the moving frame 8, that is, the longitudinal direction of the section steel 1, and the return refers to the direction from the right origin _O2 to the left origin _O1 , and when the return in the X direction is completed. is a state in which the drill unit 2 moving together with the moving frame 8 has exceeded the left origin O ₁ and has reached the left limit point of the movable range l. If the determination result in step 3 is that the return in the X direction is OK, proceed to step 7, which will be described later. If _the return in the
is located at or near the left limit point, and it is determined whether the limit switch LS is on. If it is not ON, turn on drill unit 2 in step 5.
At the same time, the moving frame 8 is returned in the X direction at high speed, and the high speed return is continued through step 3 until the limit switch LS is turned on in step 4. In step 6, OK for return in the X direction is obtained, the high-speed return of the drill unit 2, that is, the moving frame 8 is stopped, and the process proceeds to step 7 via step 3. Therefore, in steps 3 to 6, as shown by the solid line and arrow B in Fig. 3, the drill unit 2 (moving frame 8) is moved at high speed beyond the left origin _O1 to the left limit point of the movable range l where the limit switch LS is turned on. It is meant to be moved. In step 7, it is determined whether the drill unit 2 is located at the left origin _O1 . When the drill unit 2 is located at the left origin _O1 in steps 3 to 6, step 1, which will be described later, is executed.
Go to 1. If the drill unit 2 exceeds the left origin _O1 and the limit switch LS is turned on, the drill unit 2 is not located at the left origin _O1 , so proceed to step 8. In step 8, it is determined whether or not a Z signal as a positioning signal is output from the rotary encoder that measures the moving position of the drill unit 2 (moving frame 8). If the Z signal is not output, this indicates that the drill unit 2 is not located at the left origin _O1 , and in step 9 the drill unit 2 (moving frame 8) is advanced at low speed in the X direction. This forward movement refers to the direction in which the drill unit 2 (movement frame 8) moves from the left limit point to the right limit point of the movable range l shown in FIG. In step 9, the drill unit 2 (moving frame 8) is moved at low speed from the left limit point of the movable range l until the Z signal is output from the rotary encoder in step ₈ via step 7, that is, until it is located at the left origin O1. to move forward. When the determination result that the Z signal is outputted in step 8 during the forward movement is obtained, the drill unit 2 is stopped at the left origin _O1 in step 10, and the process proceeds to step 11 via the step 7. This indicates that the return to origin has been completed and the drill unit 2 has been set at the left origin _O1 , and the process proceeds to return RET.
In steps 7 to 11, the drill unit 2 (movement frame 8) is moved at low speed from the left limit point of the movable range l toward the left origin _O1 , as shown by the two-dot chain line and arrow C in FIG. The drill unit 2 is stopped at the left origin _O1 . As mentioned above, the drill unit 2 (moving frame 8) is first run at high speed and then at low speed until it reaches the left origin _O1 , so there is no possibility that the position will deviate beyond the left origin _O1 due to ellipticity. . Return RET
In this case, the contents stored in the microcomputer and other control operations are returned to a predetermined origin to enable the next positioning dimension control operation and drilling control operation.

Further, the return operation of the drill unit ₂ to the right origin O2 is performed according to the same flowchart as the return operation to the left origin _O1 shown in FIG. in this case,
In the return operation to the right origin _O2 , simply replace the words ``return'' in steps 3, 5, and 6 shown in Figure 2 with forward movement, and replace the word ``forward'' in step 9 with return. As shown by the solid line and arrow D in the figure, the limit switch LS is turned on beyond the right origin _O2 .
The drill unit ₂ (moving frame 8) is advanced at high speed until it reaches the point where After that, the drill unit 2 is stopped at the right origin _O2 .

On the other hand, in order to return the drill unit 2 to the center origin _O3 , as shown in FIG. Determines whether the control device turns on when the automatic return button switch PB is pressed. If it is not turned on, the drill unit 2 has already been returned to the center origin _O3 , so the process proceeds to return RET and preparations are made for the next positioning dimension control operation and drilling control operation. If the center origin automatic return button switch PB is turned on, it indicates that the drill unit 2 is at a free position other than the center origin O ₃ and has not been returned to its origin, and the process proceeds to the next step 3 to perform the return operation. . In step 3, it is determined whether the return in the X direction has been completed, as in the case of returning to the left origin shown in FIG. If the determination result in step 3 is that the return in the X direction is OK, proceed to step 7, which will be described later. If _the return in the
Determine whether LS is ON. If it is not ON, in step 5, the judgment result from step 4 is passed through step 3 to set the limit switch LS.
The movable frame 8 is returned together with the drill unit 2 at high speed in the
The return to the direction is completed and the process proceeds via step 3 to step 7. In step 7, it is determined whether the drill unit 2 is located at the left origin _O1 . When the drill unit 2 is located at the left origin _O1 , proceed to step 11, and when it is not located, proceed to step 8. In step 8, if the Z signal is not output from the rotary encoder that measures the moving position of the drill unit 2, it indicates that the drill unit 2 is not located at the left origin _O1 , and in step 9, the drill unit 2 (moving position) is not output. The frame 8) is moved forward at a low speed in the X direction. The forward movement continues until it is determined in step 8 that the Z signal has been output. When it is determined in step 8 that the Z signal has been output, the drill unit 2 is stopped at the left origin _O1 in step 10, and the process proceeds to step 11 via step 7. Step 11
Then, the drill unit 2 is positioned to the center origin _O3 . That is, as shown by the arrow F in FIG. 6, the drill unit 2 first moves forward from the left origin _O1 at high speed, and during the forward movement, the distance signal output from the rotary encoder is output according to the traveling distance of the drill unit 2. , received by a counter mediated by a microcomputer in the control device,
The counter counts the position of the drill unit 2 with reference to the left origin _O1 . When the drill unit 2 travels at high speed to a predetermined position in front of the center origin _O3 , it advances at low speed from that position as shown by arrow G in FIG. 6, and returns to the center origin O stored in the microcomputer. When ₃ and the counted value of the counter match, drill unit 2
(Movement of moving frame 8) is stopped. As a result, as shown in step 12, the drill unit 2
is returned to the center origin _O3 and proceeds to return RET as described above. In the embodiment described above, the drill unit 2 is returned to the center origin _O3 using the left origin _O1 as a reference, but it can also be returned using the right origin _O2 as a reference.

When each return to the origin is completed, each of the sections 1 is positioned and clamped, and each origin O ₁ to O ₃ is set as a reference according to the position pattern of the plurality of rivet holes to be drilled stored inside the microcomputer. The drill unit 2 is moved in the X-axis direction and in a direction perpendicular to the X-axis direction along the moving frame 8 to position it and perform a drilling operation. Said section steel 1
To position the steel section 1, first, a single laser beam 12 is projected from a projector 11 onto the outer surface of the flange of the section steel 1, as shown in FIG. The laser beam 12 coincides with the axis of the drill tool 13, and when the drill unit 2 is returned to the origin _O1 to _O3 ,
The origins O ₁ to _{O 3} and the laser beam 12 coincide with each other. When drilling rivet holes 14 at both ends of the shaped steel 1, the left or right end surface of the shaped steel 1 is aligned with the left origin or right origin O ₁ , O ₂ , that is, with the laser beam 12, and then clamped. Shaped steel 1
When drilling at the left end of the hole, the moving frame 8, ie, the drill unit 2, is moved to the right with respect to the left origin _O1 to perform the drilling work. If holes are to be drilled at the left end of section steel 1 in a position pattern symmetrical to the position pattern of the rivet holes at the right end, the microcomputer in the control device performs arithmetic processing in order to use the same data and reverse only the direction of movement. Then, the movable frame 8, ie, the drill unit ₂ , is moved to the left with respect to the right origin O2 to perform drilling work. In addition, when drilling a plurality of rivet holes 14 at a location other than the center or both ends of the section steel 1, mark the marking line 15 on the outer surface of the flange of the section steel 1 corresponding to the center position of the drilling pattern.
After aligning the marking line 15 with the laser beam 12, the laser beam 12 is clamped. The shaped steel 1 can be freely moved in the longitudinal direction by operating the manual turning handle 16. Mark line 15
After aligning the laser beam 12 with the laser beam 12 and clamping the section steel 1, when drilling holes on the right side of the marking line 15 in the same position pattern as the left end of the section steel 1,
Using the position pattern data at the left end,
Similarly to the above, the movable frame 8, ie, the drill unit 2, is moved to the right side with respect to the marking line 15 to perform the drilling work. When drilling holes to the left of the marking line 15 in a position pattern that is symmetrical to the left end of the section steel 1,
Using the data of the position pattern of the left end, the microcomputer in the control device performs arithmetic processing to reverse only the moving direction.
The moving frame 8, ie, the drill unit 2, is moved to the left with reference to the drilling operation.

In the present invention, the movable frame 8 is moved at high speed until the drill unit passes the left origin or the right origin, but the distance it takes to stop after passing the left origin or right origin may vary depending on conditions such as friction resistance. Therefore, even if there is a change, the movement of the movable frame at low speed and positioning of the drill unit at the left origin or the right origin will not be affected in any way. When positioning the drill unit at the center origin, as described above, first position the drill unit at the left or right origin, then measure the center origin while counting the distance traveled from the left or right origin using the rotary encoder. The moving frame is moved at high speed to the front, and then the moving frame is moved at low speed until the drill unit is located at the center origin set as the distance from the left origin or right origin by the rotary encoder.
This positions the drill unit at the center origin. Therefore, even when positioning the drill unit at the center origin, the rotary encoder monitors the moving distance of the moving frame, so during the transition period from high-speed movement to low-speed movement, the inertia and inertia of the moving frame are Even if there is a change in the distance or time of movement, there is no effect on positioning the drill unit at the center origin.

Further, the center origin _O3 is not limited to the center between the left origin _O1 and the right origin _O2 , but can be set arbitrarily, and the set value can be stored by a control device using a microcomputer. be.

"Effects of the Invention" As described above, according to the method for positioning the drill unit in the drilling machine for shaped steel according to the present invention, the left origin, the right origin, and the center origin are set within the movable range of the moving frame, and the Each origin is selected according to the position to be drilled, and the drill unit is aligned and used as a reference for determining the position of the rivet hole to be drilled. It is not only possible to reduce the complicated setup work that would have been required for drilling without attaching a marking line, as there is no need to attach a marking line other than the marking line for the center origin. Since there is no need to add another marking line, dimensional errors and even drilling errors are less likely to occur, and dimensional accuracy can be improved. However, since the center origin is set, the position pattern of the rivet holes for the same drilling can also be used to divide the symmetrical rivet hole position pattern from the center origin to the left and right. can also be used based on the left origin, right origin, and center origin, and the data regarding the position of one rivet hole to be drilled can be used to divide and drill holes at the left end, right end, and left and right from the center of the section steel. However, the calculation for determining the position of the rivet hole can be extremely simplified since it is only necessary to use the position from each origin as a reference. Furthermore, even if the moving distance due to inertia after high-speed movement of the moving frame changes for some reason,
Readjusting allows you to position the drill unit at each origin with high precision without any trouble. This has the effect of simplifying the program for controlling the movement of the moving frame and drill unit.

[Brief explanation of the drawing]

The drawings show an embodiment of the method for positioning a drill unit in a drilling machine for shaped steel according to the present invention, FIG. 1 is an overall perspective view of a drilling machine for shaped steel incorporating the method, and FIG. 2 shows a drill A flowchart showing the operation of returning the drill unit to the left or right origin, FIG. 3 is an explanatory diagram showing the operation of returning the drill unit to the left origin, and FIG. 4 is an explanation showing the operation of returning the drill unit to the right origin. Figure 5 is a flowchart showing the operation of returning the drill unit to the center origin, Figure 6 is an explanatory diagram showing the operation of returning the drill unit to the center origin, and Figure 7 is a flowchart showing the operation of returning the drill unit to the center origin. It is an explanatory view showing a positioning method of a drill unit. 1...Shaped steel, 2-4...Drill unit, 5...Base stand, 6...Gate frame, 7...Rail guide, 8
...Moving frame, 9...Control panel, 10...Operation panel, 11...Floodlight, 12...Laser beam, 13...
Drill tool, 14...Rivet hole, 15...Scoring line, 1
6...Handle.

Claims (1)

[Claims] 1. A movable frame that is movable along the longitudinal direction of the shaped steel with respect to the base; and a drill unit that is movable on the movable frame in a direction perpendicular to the direction of movement of the movable frame. and a control device for controlling the movement of the movable frame and the drill unit, in which the riveter hole position is input based on the origin, and the movable frame is movable along the longitudinal direction of the shape steel. A left origin and a right origin are set near both ends of the range as a reference when indexing the drilling position, and a center origin is set at the intermediate position between the left origin and the right origin, and the drill unit is moved to the left origin or the right origin. When positioning to the right origin, first determine the current position of the drill unit, and when the drill unit is located at a free position between the left origin and the right origin excluding the left origin or right origin, The moving frame is moved at high speed beyond the origin until the limit switch is turned on, and then the drill unit is positioned at the left or right origin and a positioning signal is input to the control device from the rotary encoder that counts the distance traveled by the moving frame. On the other hand, when positioning the drill unit at the center origin, move the moving frame at low speed until the drill unit reaches the center origin. Move the drill unit at high speed beyond the origin or right origin until the limit switch is turned on, then move the moving frame at low speed, and position the drill unit at the left or right origin by inputting a positioning signal from the rotary encoder to the control device. After letting
The control device moves the moving frame at high speed to just before the center origin while counting the moving distance from the left or right origin using a rotary encoder, and the drill unit then sets the distance from the left or right origin using the rotary encoder. A method for positioning a drill unit in a drilling machine for shaped steel, characterized by moving a moving frame at low speed until it is located at a center origin.