JPH04146011A - Drilling of shape steel and its device - Google Patents

Abstract

PURPOSE:To shorten working hours and to miniaturize a whole device by drilling while controlling the delivery length by way of movement of a first grip, and drilling while a second grip receives a shape steel at the limit of the movement, chucks it and transports it. CONSTITUTION:A shape steel is chucked by a grip 23, delivered into a machine by movement of a first grip 23, drilled at a previously set drilling position of the shape steel by a drill unit provided on the machine while controlling the delivery length of the shape steel, and a second grip 24 receives the shape steel at the movement limit point of the first grip 23, chucks it and drills it while transporting the shape steel. Accordingly, it is possible to carry in the shape steel without a helping hand within a short period of time and to drill a rivet hole on a specified position by using a pair of the grips 23, 24 and while automatically feeding the shape steel even if it is a lengthy shape steel, and consequently, it is possible to shorten working hours and miniaturize the overall device.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for drilling a shaped steel and an apparatus therefor for drilling rivet holes at predetermined positions in a shaped steel.

"Prior art" As a conventional technology of this kind, the present applicant has disclosed
What has already been proposed in Publication No. 39050 is known. The method and device for perforating a section steel described in JP-A-60-39050 discloses a structure in which a wave,
Three drill units for drilling both flanges are installed, and the gate-shaped frame is provided so as to be movable in the longitudinal direction of the shaped steel. Then, after aligning and fixing the end or center of the section steel to the movement origin of the portal frame, the portal frame is moved relative to the section steel and a hole is drilled at a predetermined position on the section steel. This is what I did.

``Problems to be Solved by the Invention'' However, with the above-mentioned conventional method, a worker must carry a fairly heavy section into the machine, align it with the movement origin of the portal frame, and fix it. This requires considerable hard labor, and a lot of work time is spent transporting, positioning, and fixing the sections. Furthermore, since the gate-shaped frame of the drilling machine moves to drill rivet holes at predetermined positions in the steel section, the length of the drilling machine itself becomes longer, the installation floor space is larger, and further downsizing is possible. desired.

In view of the above-mentioned circumstances, the present invention is capable of transporting shaped steel in a short time without requiring manual labor, and utilizes two sets of grips to transport even long shaped steel. It is an object of the present invention to provide a method and device for drilling a section steel, which can drill rivet holes at predetermined positions while automatically feeding the steel, thereby shortening working time and downsizing the entire device.

"Means for Solving the Problems" The present invention has been made to achieve the above objects, and
In claim (1), the acid shaped steel is chucked by a first grip and fed into the fuselage by movement of the first grip, and the acid shaped steel is installed in the fuselage while controlling the feeding length. A shaped steel is formed by drilling a hole at a preset drilling position in a shaped steel using a drill unit, and at the movement limit of the first grip, a second grip receives and chucks the shaped steel, and then drills while transporting the shaped steel. It is characterized by a drilling method. In claim (2), there is provided a Y-axis drill unit that is movable along the longitudinal direction of the horizontal frame of the gate-shaped frame and for drilling holes in the waves of the section steel; A Zl-axis drill unit and a Z-axis drill unit installed on both sides of the section steel and capable of vertical movement in the height direction for drilling holes in the section steel.
A z-axis drill unit, a first grip that is movable in the drawing direction to the inner surface of the drawing hole into which the section steel of the gate-shaped frame is drawn and chaffs the section steel, and a first grip that chaffs the section steel at the limit of movement of the first grip. and a second grip for receiving, chucking, and further feeding the section steel.

``Example'' Below, an example of the method of drilling a section steel and the device thereof according to the present invention will be described with reference to the drawings. In Figure 1, 1
2 is a stand frame, and 2 is a gate-shaped frame fixed to the stand frame l. A guide rail 3 is laid on the horizontal frame portion 2a of the gate-shaped frame 2. A Y-axis drill unit 4 is movably mounted on the guide rail 3. The Y-axis drill unit 4 is screwed into a screw rod 6 which is rotationally driven by a Y-axis circumferential servo motor 5 using a pole nut mechanism.

The Y-axis drill unit 4 is rotationally driven by a Y-axis drive motor 7, and a built-in hydraulic cylinder moves the drill tool up and down for drilling. A guide rail 8 is also installed in the height direction on one of the standing legs 2b of the gate-shaped frame 2, and a Z-axis drill unit 9 is attached to the guide rail 8 so as to be vertically movable. The ZI-axis drill unit 9 is screwed into a screw rod 11 that is rotationally driven by a Z1-axis servo motor 10 using a pole nut mechanism. The zI-axis drill unit 9 is rotatably driven by a Z1-axis drive motor 12, and a built-in hydraulic cylinder moves the drill tool in the drilling direction. Fixing vises 13 are fixed on the platform frame 1 near where one of the standing legs 2b of the gate-shaped frame 2 is fixed, at appropriate intervals in the feeding direction of the section steel. The drill tool of the ZI-axis drill unit 9 moves in and out of the flange of the section steel for drilling. A guide rail 14 is attached to the base frame 1, and a fixed vice 13 is attached to the guide rail 14.
A pedestal 15 is mounted so as to be freely movable toward the side. The pedestal 15 is moved toward the fixed vise 13 by a hydraulic cylinder. A movable vise 16 is fixed on the side of the frame 15 opposite to the fixed vise 13. Two movable vises 16 are also arranged at appropriate intervals in the drawing direction of the section steel. A plurality of support rolls 17 for receiving shaped steel are rotatably supported on the base frame 1 below the movable vise 16. Further, a support leg 18 is erected on the pedestal 15, and the support leg 18 is movable up and down via a guide rail in the same manner as the Z1-axis drill unit 9.
A 22-axis drill unit 20 is mounted which is rotationally driven by a shaft drive motor 19 and movable by a built-in hydraulic cylinder for drilling into the flange of a section steel.

The drill tool of the Z two-axis drill unit 20 projects from within the gap between the movable vises 16 toward the flange of the section steel. An upper presser 22, which is moved up and down by a hydraulic cylinder 21, is disposed in the gap between the movable vises 16 and in the gap between the fixed vises 13.

The upper holding tool 22 is for pressing the shaped steel toward the support roll 17, the first grip 23, and the second grip 24, and fixing the shaped steel so that it cannot be moved when drilling the riveted holes. The first grip 23 and the second grip 24 are provided so that one end side of the stand frame 1 on which the fixed vise 13 is fixed protrudes upward from the other part, and is attached to the inner surface of the protruding part of the stand frame 1. It is installed.

The Y-axis drill unit 4, the z1-axis drill unit 9,
Each drill tool of the Z two-axis drill unit 20 is always -
It is positioned in a plane and performs a drilling operation. A laser emitter A and a receiver B are placed facing each other with the shaped steel in between, at a position slightly on the loading side of the plane in which each drill tool is located, and the laser beam from the laser emitter A is used to shape the shape. The length of the shaped steel is measured by cutting off at the tip of the steel, and the drilling position of each drill tool on the shaped steel is determined. The laser emitter A and the light receiver B are mounted in a transparent space provided in the movable vise 16 and the fixed vise 13.

The first grip 23 and the second grip 24 are attached to a screw rod 25 as shown in FIGS. 2 and 3. That is, the first grip 23 is attached to the screw rod 25 on the loading side of the shaped steel, and the second grip 24 is attached to the unloading side of the shaped steel. The screw rod 25 has a screw 27 in a portion where the first grip 23 is attached and a screw 2 in a portion where the second grip 24 is attached.
8 has a reverse thread, and is rotationally driven by a gripper servo motor 26.

The screw rod 25 is rotatably supported by the base frame 1, and the gripper servo motor 26 is connected to one end thereof. The rotation speed and rotation angle of the screw rod 25 are measured by a rotary encoder built into the gripper servo motor 26, and the moving positions of the first grip 23 and the second grip 24 are detected. The first grip 23 and the second grip 24 have the same configuration. That is, the first grip 23 and the second grip 24 have an X-axis slider 29, as shown in FIGS. 4 to 8. As shown in FIGS. 5, 6, and 8, the X-axis slider 29- has a substantially T-shaped side surface, and has linear way bearings 30 and 31 attached to the vertical wall surface. Each linear way bearing 30.311:! , a guide rail 33 installed on the platform frame 1 via a clamper base 32,
34 so that it can run freely. An X-axis bearing holder 35 is installed on the lower surface of the horizontal wall of the X-axis slider 29.
be fixed. As shown in FIG. 4, the X-axis bearing holder 35 is equipped with a ball bearing mechanism 36 which is threadedly engaged with the screw rod 25. Two pins 37 are installed on the upper surface of the horizontal wall of the X-axis slider 29, and linear bushings 38 are interposed between the pins 37 as shown in FIGS. The first clamp holder 39 is fitted into the hole 39a of the first clamp holder 39 so as to be movable in a direction perpendicular to the first clamp holder 39. Pin 3 between the first clamp holder 39 and the vertical wall of the X-axis slider 29
7 is fitted with a collar 40 that restricts the movement of the first clamp holder 39, and on the other side of the pin 37 is a bushing spring that presses the first clamp holder 39 in the direction of the collar 40. 41 is fitted. The first clamp holder 39 has a hole 39b, and the hole 3
9b with a linear bush 42 interposed between the two pins 43.
are fitted so that they can slide vertically. The head of the pin 43 is the second
It is fixed to the clamp holder 44 of. The second clamp holder 44 has a recess at the center of the upper surface, and a presser plate 45 is bolted to the projecting edge of the upper surface so that a portion thereof protrudes into the recess, and a fixing claw 46 is attached to the upper surface so as to straddle the recess. It is bolted to one end. A hydraulic cylinder 48 is fixed to one end surface of the second clamp holder 44 via a cylinder plate 47. The piston rod 48a of the hydraulic cylinder 48 passes through the cylinder plate 47, faces into the recess of the second clamp holder 44, and is connected to a clamp slider 49 slidably housed within the recess. A movable claw 50 for clamping the lower end of the flange of the section steel is bolted to the clamp slider 49 together with the fixed claw 46. In FIG. 1, 51 is a control device that controls the entire apparatus, and in FIG. 6, W is a section steel.

Further, in this embodiment, the wave hide detection device 52 already proposed by the present applicant in Japanese Patent Application Laid-Open No. 61-20804 (Japanese Patent Application No. 141650-1982) and Japanese Patent Laid-Open No. 61-208
The wave width detection device already proposed in No. 06 (Japanese Patent Application No. 59-141651) is attached. The wave hide detection device 52 inputs the drilling pitch and wave thickness of the shaped steel flange into the control device 51 in advance, and when the wave hide detection device 52 operates, the actual measured distance from the movement origin to the flat bottom surface of the wave is controlled. The information is sent to the device 51 and instantaneously performs calculations to easily and accurately position the hole to be drilled into the flange based on the wave center.

On the other hand, in the wave width detection device, the drilling pitch for the shaped steel wave is inputted in advance to the control device 51, and the fixed vise 1
When moving the movable vise 16 relative to 3 and fixing the section steel, the wave width of the section steel is determined from the amount of movement of the movable vise 16, and the wave center is calculated to determine the hole from the wave center to the wave. The opening is designed to determine the position.

In the above configuration, when the shaped steel is carried in from the direction of the arrow shown in FIG. 1 at the position shown by the solid line in FIGS. 2 and 3, the fixed claw 46 and the movable claw 50 of the first grip 23 The lower surface of the flange of the section steel is inserted in between. This feeding length is a length that allows the second grip 24 to grip the lower surface of the flange of the section steel at the movement limit of the first grip 23, that is, in the state shown by the two-dot chain line in FIGS. 2 and 3. The length from the tip of the section steel corresponding to the distance between the first grip 23 and the second grip 24 is fed into the first grip 23, and the section of the section steel is moved by the operation of the hydraulic cylinder 48. hold it between them. Next, the gripper servo motor 26 is driven to move the first grip 23 toward the second grip 24 to feed the shaped steel into the portal frame 2, and by this feeding, the laser beam is emitted from the laser emitter A. Using the laser beam directed toward the receiver B, the control device 51 measures the length of insertion from the tip of the shaped steel, and when the drilling position set in advance in the control device 51 is reached, the drive of the gripper servo motor 26 is stopped. Next, the movable vise 16 moves, and the shaped steel is clamped and fixed between the movable vise 16 and the fixed vise 13. Thereafter, the wave and both flanges of the section steel are drilled using the Y-axis drill unit 4, Zl-axis drill unit 9, and Z2-axis drill unit 20. After this drilling, the movable vise 16 opens to release the fixed shape steel from the fixed vise 13,
The gripper servo motor 26 is driven again, and the first grip 23 feeds the shaped steel to the next drilling position, and after the shaped steel is fixed by the movable vice 16 and the fixed vice 13, the next drilling is performed. Repeat this in sequence, but with the first grip 2
3 reaches the limit of movement, the lower surface of the flange at the tip of the shaped steel is inserted between the fixed claw 46 and the movable claw 50 of the second grip 24, and now the second grip 24
The hydraulic cylinder 48 is operated to grip the lower surface of the flange of the section steel with the second grip 24, while the first grip 2
Release the clamping of the lower surface of the flange of the section steel in step 3. Similarly to the first grip 23, the second grip 24 is moved by the gripper servo motor 26 to convey the shaped steel, and the conveyance by the second grip 24 is stopped at a predetermined position of the shaped steel. , Drill the rivet holes in the same manner as above. Also in the second grip 24, a hole is drilled at a predetermined position in the shaped steel while moving the shaped steel. When the second grip 24 reaches the end of its movement, the first grip 23 returns to the starting point of its movement, since the threads 27, 28 of the screw rod 25 are counter-threaded to each other. Therefore, while the first grip 23 holds the lower surface of the flange of the section steel, the second grip 23
If the lower surface of the flange of the shaped steel is released from the grip 24, and the first grip 23 is moved by the gripper servo motor 26, the above-mentioned rivet holes can be drilled while conveying the shaped steel. can be done. Thereafter, the above operation is repeated to drill predetermined rivet holes in each location of the shaped steel.

By the way, the first grip 23 and the second grip 24
After the lower surface of the flange of the section steel is clamped between the fixed claw 46 and the movable claw 50 by the hydraulic cylinder 48, the movable vise 1 is
6 moves to fix the shaped steel between it and the fixed vise 13, the shaped steel shifts toward the fixed HSS 13, but at this time, the first clamp holder 39 moves along the pin 37.

The first clamp holder 39 can be moved in accordance with the warpage even when the shaped steel is warped. On the other hand, the shaped steel may be bent in the vertical direction as well, and such shaped steel is held in the first grip 23 or the second grip 24.
When the shaped steel is clamped and fed, a vertical force is applied to the first grip 23 or the second grip 24 depending on the bending state of the shaped steel. At this time, in the first grip 23 or the second grip 24, the second clamp holder 44 moves up and down with respect to the first clamp holder 39 to absorb the action of the inadvertent force on the bending of the section steel. .

Note that the lower surface of one flange of the shaped steel was held between the first grip 23 and the second grip 24 and fed, and at this time the lower surface of the other flange of the shaped steel was supported by the support rolls 17. It is also possible to carry the flange while being held by grips, and the part to be held by the grips is not limited to the bottom surface of the flange, but may be any appropriate location such as the top surface.

"Effects of the Invention" As described above, according to the method of drilling a section steel and its device according to the present invention, the section steel can be carried in in a short time without requiring any human effort, and two sets of grips are used. Even in the case of long shaped steel, it is possible to drill holes at predetermined positions while automatically feeding the shaped steel, reducing working time and downsizing the entire device, making it easy to use. It's convenient.

[Brief explanation of drawings]

The drawings show an embodiment of the method and apparatus for drilling a section steel according to the present invention, and FIG. 1 is an overall perspective view of the section steel drilling apparatus, and FIG. 2 is a diagram showing the driving of the first grip and the second grip. FIG. 3 is a plan view of FIG. 2, FIG. 4 is a front view of the first grip and second grip, and FIG. 5 is a longitudinal section of the first grip and second grip. Figure 6 is a cross-sectional side view of the main parts of the first grip and the second grip, Figure 7 is a plan view of the first grip and the second grip, and Figure 8 is the first grip. and an exploded perspective view of the second grip. 1... Stand frame 2... Gate-shaped frame 4.
...Y-axis drill unit 9...Z-axis drill unit 13...Fixed vise 16...Movable vise 20
...Z2-axis drill unit 23...First grip 24...Second grip 25...Screw rod 26...Gripper servo motor

Claims (2)

[Claims] (1) Chuck the section steel with the first grip, feed it into the machine body by moving the first grip, and shape it with the drill unit installed in the machine body while controlling the length of the section steel. A hole is drilled at a preset drilling position in the steel, and at the movement limit of the first grip, the second grip receives and chucks the shaped steel, and the shaped steel is sequentially drilled at the set positions while being conveyed. A method for drilling shaped steel, characterized by: (2) A Y-axis drill unit that is movable along the longitudinal direction of the horizontal frame of the gate-shaped frame and for drilling holes in the wave of the section steel, and both sides of the section steel that is fed into the gate-shaped frame. A Z_1-axis drill unit and a Z_2-axis drill unit are installed in the center and are movable up and down in the height direction, and are used to drill the flange of the shaped steel. It consists of a first grip that is movable to chucking the shaped steel, and a second grip that receives the shaped steel at the end of the movement of the first grip, chucks the shaped steel, and further feeds the shaped steel. Drilling equipment for shaped steel.