JPH0129645B2 - - Google Patents

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention is directed to drilling holes in a section steel such as an H section steel or a channel steel having a flange that faces the wave. The present invention relates to a section steel drilling machine having a dimension correction device suitable for correcting dimensional errors between ends and performing highly accurate drilling.

"Prior Art" Generally, the absolute conditions for positioning a flange portion when drilling a section steel are as follows.

(1) The ideal positioning method for positioning the left and right flanges of a section steel is to distribute the drilling pitches from the center of the wave. This is because when joining perforated sections to each other,
This is because it is always performed using the wave as a reference.

(2) For shaped steel, according to JIS standards, the center of the wave relative to the flange is 300 mm.
The allowable value is ±3mm for less than mm, and ±4.5mm for more than 300mm.

(3) When drilling holes in such a shaped steel by positioning from the origin (bottom surface of the flange), the centers of the drilled holes in each flange may be misaligned because the wave is used as a reference when joining the shaped steel. The joint plate cannot be installed and must be corrected.

Conventionally, the general structure of a drilling machine for drilling into waves and flanges of shaped steel is to provide a gate-shaped column on a base table, and a drill unit to be slidably placed on the base table. A horizontal frame is provided in between, and the drill unit is slidably suspended on the horizontal frame.

"Problem to be Solved by the Invention" However, since all the components were formed to be placed on the base, the base was extremely complex, making it difficult to remove chips, replace tools, make adjustments, etc. This is difficult to do, which poses problems in terms of work efficiency, and all of the above operations require standing on a base, which is extremely dangerous. Furthermore, the area of the base became very large, making the machine larger and creating problems in selecting the installation location.
In addition, in conventional technology, most of the positioning of the shaped steel involves moving the shaped steel itself, which causes stop deviation due to inertia caused by the movement of the large mass of the shaped steel, as well as clamping misalignment, etc. There was a drawback that positioning was difficult. Particularly when there are differences in the perforation positions on opposing flange surfaces, there is a drawback that positioning of the section steel cannot be easily performed. or,
Most of the drill units in three directions move independently, and each of these sliding devices is required, making the entire machine large and complex as described above, and therefore the control device for these is also large and complex. There was a drawback.

On the other hand, as shown in Fig. 6, the dimensions B and B' between both ends of the wave of a section steel (H section steel in the figure) and the flange end are usually different, so the base with which the flange end is in contact is If the drilling position of the drill unit is determined from the plane, a problem arises in that the drilling is performed at a position asymmetrical to the wave. When joining shaped steel, the wave is used as a reference, so if the holes are drilled asymmetrically, a problem arises in that the joining cannot be done smoothly. In the conventional technology, there is a method in which positioning is performed from the base surface (flange end) despite the above-mentioned problems, or a method in which the dimensional error at both ends of the wave is determined by mechanical or manual operation, and the position of the drill unit is corrected using this value. However, even in the latter case, the correction takes time and this operation has to be performed every time the section steel is changed, which has the drawback of lowering work efficiency and positioning accuracy.

The present invention was devised to solve the above-mentioned problems and shortcomings, and its purpose is to provide a compact and lightweight
It is an object of the present invention to provide a section steel drilling machine having excellent operability, improving work efficiency, and having a dimension correction device capable of automatically and accurately drilling holes centered on waves.

"Means and effects for solving the problem" In order to achieve the above object, the present invention fixes the section steel on the base 1 with the clamping members 6a, 8, and attaches it to the square frame 18. The rail guides 19, 20 are moved to position each drill unit 37, 38, 40 in the longitudinal direction of the shaped steel, and the unit bases 31, 34 are moved relative to the rail guides 19, 20 to position the drill unit 3
7 and 38 in the height direction, and then
By moving the unit base with respect to 6, the drill unit 40 is positioned in the left-right direction relative to the section steel, and drilling is performed. Moreover, before drilling into the shaped steel, the heights of both ends of the wave are measured.
For this measurement, first, the abutment member 42 is
is moved from the upper surface of the base 1 and brought into contact with the lower surface of the wave. The rack 43 moves together with the abutment member 42, and the rotary encoders 15a, 15b that mesh with the rack 43 measure the amount of movement of the rack 43, that is, the amount of movement of the abutment member 42. The height of both ends of the wave measured by the rotary encoders 15a and 15b is determined by the calculation device 17 based on the difference in height between the two ends of the wave.
38 is calculated, and the control device 16 receives this calculated value and corrects the position of the drill unit. Furthermore, since the other rail guide 20 can be moved to one rail guide 19, the drill units 37, 38, 40
It is possible to adjust the lateral positions of the sections with respect to the section steel.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

As shown in Fig. 1, there is an H-beam 2 on the base 1.
are placed with their flange ends touching. In detail, in order to facilitate the insertion of the H-beam 2, the base 1
It is supported on rollers 3 attached to. Further, guide rolls 4 and 5 shown in FIG. 2 are also provided to facilitate insertion of the H-section steel. Supports 6 and 7 are erected at the corners of the base 1, with one support 6
A clamping member 6a against which the flange of the H-shaped steel 2 comes into contact is fixed to the inner surface of the housing. In addition, in a position opposite to the holding member 6a on the left and right, a base 1 is provided on both ends thereof.
A movable clamping member 8 is supported on the base 1 and is slidably engaged with the clamping member 6a so as to move in the left and right directions. A rod 10 of a hydraulic jack 9 is in contact with the side surface of the movable clamping member 8, and the hydraulic jack 9 is moved on the base 1 by a handle 12 connected to a threaded rod 11 screwed thereto. Due to this movement, the movable clamping member 8 slides on the base 1 and clamps the flange surface of the H-shaped steel 2 together with the clamping member 6a. Incidentally, the H-beam 2 is fixed by operating a hydraulic jack 9.

A pair of dimension correction devices 13 are disposed below both ends of the wave of the H-section steel 2. Dimension correction device 1
3, as shown in FIGS. 3 to 5, detects a moving part 14 that is attached to the clamping member 6a and the movable clamping member 8 and moves up and down to contact the wave, and the amount of movement of the moving part 14. rotary encoder 1
5a, 15b, and an arithmetic device 17 that calculates the difference between the rotary encoders 15a and 15b and instructs the control device 16 to correct the amount. Note that details of the dimension correction device 13 will be described later.

A square frame 18 is mounted on the upper ends of the columns 6 and 7 in parallel to the base surface of the base 1. A pair of rail guides 19 and 20 are slidably suspended on opposite left and right sides of the square frame 18 via rails 21 and 22 fixed to the square frame 18. Furthermore, one end of a joint plate 23 is fixed to the rail guide 19, and one end of a rod 24 installed in parallel with the rail 21 is fixed to the other end, and the other end of the rod 24 is connected to a cylinder 25 that moves this. are doing. Furthermore, cylinder 25
is fixed to the square frame 18. A horizontal frame 26 is installed between the rail guides 19 and 20. Further, a sliding portion 26 a that is slidably supported by the rail guide 19 is formed on the rail guide 19 side of the horizontal rack 26 .
It is formed so that it can slide in the same movement direction as the rail guide 19 (hereinafter referred to as the X direction) by rotation of a threaded rod 27 that meshes with a female thread 26b formed at the end of 6a. Note that the threaded rod 27 is rotated by a handle 28. Further, a stop handle 29 for fixing the horizontal frame 26 to the rail guide 19 is provided between the rail guide 19 and the sliding portion 26a.

The first slide base 3 is attached to the rail guide 19.
0 is fixed, and the first slide base 30 is formed with a sliding portion 30a that moves the unit base 31 up and down (hereinafter referred to as the Z direction). This sliding movement in the Z direction is performed by the cylinder 32.

In addition, on the side of the rail guide 20 of the horizontal rack 26, there is a movement along the horizontal rack 26 (hereinafter referred to as the Y direction).
The second slide base 33 is slidably engaged;
The second slide base 33 has a unit base 3.
A sliding portion 33a is formed to slidably support 4 in the Z direction. The second slide base 33 is moved by a handle 36 via a threaded rod 35 that is threaded thereon.

Drill units 37 and 38 are slidably supported on the unit bases 31 and 34, and the drill units 37 and 38 are arranged to face each other and perpendicular to the flange surface of the H-section steel 2. Further, a third slide base 39 is slidably supported on the horizontal frame 26.
A drill unit 40 is supported on the slide base 39 so as to be slidable in the Z direction, and is arranged to drill into the wave of the section steel 2. Note that the third slide base 39 is moved in the Y direction along the horizontal frame 26 by the cylinder 41.

As is clear from the above configuration, the drill units 37, 38, and 40 are all connected to the first, second, and third drill units.
It is disposed in a suspended state on the square frame 18 via slide bases 30, 33, and 39, and is not placed directly on the base 1. Further, the drill units 37, 38, and 40 can be moved simultaneously in the X direction by the cylinder 25, and independently movable in the Y and Z directions, and the drill units 37 and 38 are It is possible to cause relative displacement in the X direction.

Next, the dimension correction device 13 will be explained in detail.

As shown in FIG. 3, the dimension correction devices 13 are respectively disposed below near both ends of the wave of the section steel.
The moving part 14 includes a contact member 42 that contacts the wave, and a rack 4 that is connected to the contact member 42 and extends downward.
3, a cylinder 44 for moving the abutting member 42 and the rack 43, and the like. Further, as shown in FIG. 4, the cylinder 44 is held by a bracket 45, and the rack 43 is held by a rack guide 46 on the sides of the clamping member 6a and the movable clamping member 8, respectively. As shown in FIG. 5, a pinion 47 is engaged with the rack 43, and the pinion 47 is connected to the clamping member 6.
a and rotary encoders 15a and 15b attached below the movable clamping member 8. The rotary encoders 15a and 15b detect the rotation of the pinion 47 and the amount of movement of the rack 43. Also, rotary encoder 1
A calculation device 17 is connected to the rotary encoders 15a and 15b, and calculates a correction amount from the detection signals of the rotary encoders 15a and 15b.

Although not clearly shown in the drawings, the rack 43 is formed so that the amount of movement of the rack 43 until the abutting member 42 comes into contact with the wave exactly corresponds to the distance from the upper surface of the base 1 to the lower surface of the wave.

Next, the operation of this embodiment will be explained.

As shown in FIG. 6, by the dimension correction device 13,
Distance B from the top surface of the base to both ends of the wave,
B' is determined by rotary encoders 15a and 15b. Now, assuming that the wave thickness is W, the flange height is H, and the initial target value specified from the flange end is D, the corrected target values A and A' to be drilled are determined by the following formula.

A'=D+S'=D+[B'+W/2-H/2] A=D-S=D-[H/2-(B+W/2)] And the other hole has the target value A', A The hole is drilled at a position spaced apart from the hole by the hole pitch P.

The above calculation results are sent from the calculation device 17 to the control device 1.
6, and the control device 16 inputs this correction value to the cylinders 32 of the unit bases 31 and 34. As a result, the drill units 37 and 38 are positioned at the corrected positions. Thereafter, predetermined drilling is performed according to instructions from the control device 16.

Further, the drill units 37, 38, 40 are simultaneously moved in the X direction along the rails 21, 22 by the cylinder 25 as described above. Therefore, when each drill unit drills holes at equal pitches in the X direction, the cylinders 25 are sequentially moved by predetermined bits to perform drilling at the same time. Also, drill unit 37
If the holes 38 and 38 are to be drilled with a difference in the front and back, that is, in the X direction, the handle 28 is turned and the horizontal frame 26 is moved in the X direction by the engagement of the threaded rod 27 and the female thread 26b. Further, the drill unit 40 is independently moved along the horizontal frame 26 by the cylinder 41 to perform predetermined drilling. Next, when the width of the H-beam 2 changes, the movable clamping member 8 is moved by the handle 12 via the hydraulic jack 9, and the second slide base 33 is moved by the handle 36 to a predetermined position. This can be done by positioning the drill unit 38.

As described above, the dimension correction device 13 can automatically correct the position, shorten the dimension correction time, improve work efficiency, and perform highly accurate drilling.
Effects that do not require special skill for correction operations can be achieved. Furthermore, by arranging the drill unit 37 and the like on the rectangular frame 18 that is separate from the base 1, the area around the base 1 is simplified, making it smaller and lighter, and a deep pocket allows the drill unit to be moved to any position. (Fut roller part) is formed, making chip removal, tool exchange, and adjustment extremely easy.
Further, as described above, each drill unit etc. can be moved simultaneously in one direction by one cylinder 25, and each drill unit 37, 38, 40 can be independently moved in the other direction, and the opposing drill units 37 , 38 can be shifted between each other, so they have the same performance as completely independent drill units, and depending on the hole position to be drilled, simultaneous drilling can be performed. Drilling can be performed with extremely high efficiency. Further, since the entire device is formed to be small and lightweight, the control device 16 is also small and simple. Furthermore, positioning of the shaped steel is easy, and there is no stopping shift due to inertial force. Therefore, drilling accuracy is improved.

In this embodiment, the first slide base 30
Although the clamping member 6a is of a fixed type, the present invention is not limited to this. Moreover, the unit bases 31 and 34 and the first and second slide bases 30,
The mutual relationship with the sliding direction of 33 is not limited to the above. Also, the handles 12, 28, 36 may be automated. Moreover, the cylinders 25, 32,
41 may be any type of hydraulic pressure, and the hydraulic jack 9 is not limited to hydraulic pressure. Furthermore, the stop handle 29 is also automatically operated. Incidentally, although the embodiment has been described with respect to the H-section steel 2, the invention is similarly applied to other section steels.

"Effects of the Invention" As is clear from the above explanation, according to the present invention, the pillars 6 and 7 are erected at the corners of the base 1, and the square frame 18 is fixed to the upper end thereof. Since the drill units 37, 38, and 40 are attached to the base 1, only the movable clamping member 8 is left on the base 1. Therefore, the entire device is lightweight and has excellent operability, and work efficiency can be improved.

Further, since the reaction force during work with the drill tool is strongly supported by the base 1 via the square frame 18 and the supports 6 and 7, highly accurate work can be performed.

In addition, since a dimension correction device is provided below the wave of the shaped steel 2, after the shaped steel 2 is fixed to the base 1, drilling work is done simultaneously from the left, right, and above. 26 can be moved and holes can be drilled in multiple locations at the required pitches, resulting in good work efficiency. By automatically performing such work, it is possible to achieve an effect that can be performed without requiring special skill.

In other words, the shape steel is fixed and the drill unit is moved according to the drilling position, so even if the heights of both ends of the shape steel are different, a complicated mechanism is required to move the heavy shape steel. This allows the drilling position to be easily corrected without the need for. Correction of the dimensional position is made by the cylinder using the contact member 4.
2 is moved from the upper surface of the base 1 to contact the lower surface of the wave, and the distance until the contact member 42 contacts the lower surface of the wave is measured using the rotary encoder 15.
a, 15b measure, the arithmetic unit 17 calculates the dimensional correction amount based on the measured value, and the control unit 16
determines the drilling position by the drill unit based on the dimensional correction amount, so no matter what the height of both ends of the wave is, the dimensional correction amount is automatically calculated and the drilling position by the drill unit is determined. The position can be determined without any human intervention, and with this, no errors occur. Moreover, in order to calculate the dimensional correction amount, the cylinder, the contact member,
It can be carried out using only a rack, a rotary encoder, and an arithmetic unit, and the configuration is extremely simple, making it extremely convenient to handle.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a top view thereof, Fig. 3 is a block diagram of the dimension correction device, and Figs. 4 and 5 are partial block diagrams showing the area around the rotary encoder. , FIG. 6 is an explanatory diagram illustrating the operation of the dimension correction device. 1... Base stand, 2... H-shaped steel, 3... Roller, 4, 5
...Guide roll, 6, 7... Support, 6a... Clamping member, 8... Movable clamping member, 9... Hydraulic jack, 10
...Rod, 11,13...Threaded rod, 12,28,3
6... Handle, 13... Dimension correction device, 14... Moving part, 15a, 15b... Rotary encoder, 1
6... Control device, 17... Arithmetic device, 18... Square frame, 19, 20... Rail guide, 21, 22...
Rail, 23... Joint plate, 24... Rod, 25, 32, 41, 44... Cylinder, 26...
Horizontal frame, 26a, 30a, 33a...sliding part, 26b
...Female thread, 43...Rack, 27...Threaded rod, 47...
Pinion, 29...stop handle, 30...first
slide base, 31, 34... unit base, 33... second slide base, 37, 38,
40... Drill unit, 39... Third slide base, 42... Contact portion, 45... Bracket, 46...
Rack guide.

Claims (1)

[Claims] 1. In a shaped steel drilling machine having a dimension correction device 13 that corrects dimensional errors between both ends of the wave and the flange end of the shaped steel 2 and drills into the shaped steel from three directions, Erect the pillars 6 and 7,
A square frame 18 is fixed on the pillars 6 and 7 parallel to the base surface, and a pair of rail guides 19 are slidably suspended on the left and right sides of the square frame. 20, one end of the horizontal frame 26 is slidably engaged with one rail guide 19 in the moving direction of the rail guide, one end of the horizontal frame 26 is fixed to the other rail guide 20, and the rail guide One of them is a first slide base 3 that supports the unit base 31 in a vertically slidable manner.
0 is fixed, and a second slide base 33, which also supports the unit base 34 slidably up and down, is engaged with the horizontal frame 26 so as to be slidable left and right,
Drill units 37 and 38 for drilling the flange portions of the shaped steel are provided on the unit bases 31 and 34 so as to be slidable left and right, and on the horizontal rack 26,
Drill unit 4 for drilling the wave of the above shaped steel
A third slide base 39 that supports 0 in a vertically slidable manner is engaged to be slidable in the left and right direction, and further,
On the base 1 that supports the flange end of the section steel, one or both of the clamping members 6a and 8 for clamping the left and right opposing surfaces of the flange are provided so as to be slidable left and right, and the clamping members At the lower end of the member, a dimensional correction device 13 for calculating the dimensional error between the upper surface of the base 1 and both ends of the lower surface of the wave.
The dimension correction device 13 includes a contact member 42 that moves by a cylinder until it comes into contact with both ends of the lower surface of the wave, and a rotary that engages with a rack 43 that moves together with the corresponding contact member 42 and detects the amount of movement thereof. It consists of encoders 15a, 15b, and an arithmetic device 17 connected to the rotary encoders 15a, 15b, which detects the dimensional error and calculates the dimensional value to be corrected. A type having a dimension correction device connected to a control device 16 for controlling the positions of the drill units 37 and 38 by determining the drilling position for each flange based on the center of the wave of the shaped steel. Steel drilling machine.