JP3021636B2 - Drilling position correction device for section steel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Field of Industrial Use >> The present invention is based on an error in the cross-sectional shape of a shaped steel when drilling a flange of a T-shaped steel or an H-shaped steel used for a framework of a building. The present invention relates to a device for correcting a shift in a connecting portion.

<< Conventional Technology >> A shaped steel used as a framework of a building is provided with a bolt hole at an end thereof for connecting the shaped steel to each other. Since it is not uncommon for the cross-sectional dimension error of the shaped steel to be several mm, when drilling with reference to one edge in contact with the table of the drilling machine, a large step is formed on the opposite side of the reference surface. Will happen. So, for example,
As described in Japanese Patent Application Laid-Open No. HEI 1-1193108 and Japanese Utility Model Publication No. 1-18253, the position of a bolt hole drilled in a flange is corrected based on the surface of a web.

That is, as shown in FIG. 5, the height h of the both ends R and L of the web 42 of the shaped steel 40 placed on the table (conveying roller) 1 of the punching machine is measured with a depth gauge or the like. Flange centers C in each of the left and right flanges 41 are obtained from the measured value and the specified web thickness t, and the positions of the drill holes 43 and 44 provided in the flanges 41 are allocated with the flange center C as a center. The measurement of the height of the upper surface of the web at both ends R and L is usually performed manually, and the perforated position is determined by inputting the calculated height of the flange center C to a controller of the perforator. I was trying to make it.

<< Problems to be Solved by the Invention >> Conventionally, the positions of the drill holes 43 and 44 of the flange 41 of the section steel were positioned with reference to the surface of the web 42 because the center of strength of the section steel was matched at the connection portion. It is based on such an idea, and is reasonable in mechanics. However, according to the above configuration, the dimensional error of the cross section of the shaped steel appears as a step of the flange portion at the connecting portion of the shaped steel, which is not preferable from the aesthetic point of view and hinders fixing the wall panel or the like directly to the shaped steel.

For this reason, depending on the building style, there has been a demand for processing a drill hole for connecting an end portion of a shaped steel with reference to the outer shape of the flange, unlike the related art.

Accordingly, it is an object of the present invention to provide a drilling machine that can perform drilling of a flange portion of an H-shaped steel or a T-shaped steel based on a web of a shaped steel or based on a flange.

<< Means for Solving the Problems >> In the present invention, a receiving surface 15 and a pressing surface for holding and fixing a shaped steel 40 placed on a table or a transport roller 1 are provided.
A contact 21 which rises and lowers above the section steel 40 is provided on the fixed and movable tables 3 and 5 provided with the section 17 so as to be movable and fixed in a direction parallel to the direction of movement of the holding surface 17, and the contact 21 is provided with a flange of the section steel. The position of lifting and lowering above 41 and the web 42 near the flange
And it can be fixed to a position that moves up and down.

An elevating device 22 for elevating and lowering the contact 21 or its guide is provided with an encoder 23 for detecting the amount of elevating of the contact 21, and the output of this encoder is input to the NC control device 31 of the drilling machine. ing. The NC control device 31 is provided with a calculation means switch 36, and subtracts 1/2 of the thickness t of the web 42 registered in advance from the measured height input from the encoder to obtain the allocation center height. Two arithmetic means are provided, one arithmetic means 37 and a second arithmetic means 38 which divides the input measured height by 2 to obtain an allocation center height. These switches 36 and arithmetic means 37, 38
May be provided as hardware or software in the NC control device 31.

The NC control device 31 positions the drill 9 at a position equidistant on both sides (up and down) of the drill 9 with the drilling calculating means 39 with the allocation center height calculated by the calculating means 37 or 38 as a reference position, and performs drilling. Execute.

<< Operation >> The spacing between the fixed and movable tables 3, 5 having the receiving surface and the holding surface for holding the section steel 40 to be processed is adjusted to the dimension A between the flange faces of the section steel by moving one or both of them. The interval is set accordingly. On the fixed and movable tables 3 and 5, the contact 21 is positioned so as to move up and down above the flange 41 of the section steel, and the switching unit 36 of the NC control device is switched to the second arithmetic means 38 to execute the measurement. Then, when the contact 21 descends and its lower end abuts on the upper end of the flange of the section steel, the descending amount of the contact is input to the NC controller, and the difference in the descending amount to the section placing surface is set. , The height of the upper end of the flange is detected. Then, the heights of the detected values 1 and 2 are given to the drilling position calculating means 39 as the allocation center height. The drill holes 43 and 44 machined in the flange of the section steel in this control mode are located at the same distance from the center of the flange, and the dimensional error between the sections connected using this drill hole is on both sides of the flange. The steps are allotted, and the level difference at the connecting portion is reduced.

On the other hand, the contacts 21 on the fixed and movable tables 3 and 5 are moved above the web 42 in the vicinity of the flange, that is, toward the center of the section steel. When the section steel is measured in the state of being switched to, the height h of the upper surface of the web is detected from the output signal of the encoder indicating the descending position of the contact, and 1 / (1/1) of the web thickness t set based on the detected value. By subtracting 2, the position of the center of the thickness of the web is input to the perforation position calculation means as the allocation center position. Therefore, in this case, the drill holes 43 and 44 drilled in the flange are allocated with reference to the center of the thickness of the web, and the section steels connected using these drill holes have the same web surface, As in the prior art, the shaped steel members can be connected to each other in a state where they are aligned with the strength center of the shaped steel members.

<< Example >> Next, an example shown in the drawings will be described. 2 and 3 are views schematically showing a section steel punching apparatus provided with the correcting device of the present invention, and a punching mechanism for a web surface is not shown. Reference numeral 1 denotes a roller serving as a table for conveying and processing the shaped steel, and the shaped steel is inserted from above in FIG. The base 2 of the apparatus is provided with a fixed base 3 on one side of the roller 1 and a moving base 5 which slides along a rail 4 on the base 2 in opposition thereto.

The fixed base 3 and the movable base 5 are provided with a drill head 7 that can move up and down along a vertical guide 6, and the drill head is moved up and down by a lifting motor 8 to be positioned.
The drill head has a drill 9 and a motor to drive it
A hydraulic cylinder 12 for feeding a quill of a drill is provided.

The fixed base has a receiving surface 15 facing the movable base, and the movable base is provided with a pressing surface 17 that moves forward and backward with a short stroke by a hydraulic cylinder 16. The moving table is fixed to the base at a position where there is a margin for the dimension A between the flange surfaces of the section steel inserted on the rollers, and the movable surface moves between the receiving surface and the pressing surface by the movement of the pressing surface. Hold and fix the steel. Above the receiving surface and the holding surface of the fixed base and the movable base, a measuring device mounting surface 18 which is a horizontal surface is formed.

The measuring device 20 includes a contact 21 and a cylinder for moving the contact 21 up and down.
22, a contact 21, an encoder 23 for counting the movement stroke, and an origin sensor 24 for resetting the encoder counter are fixed to the measuring device mounting surface 18 by bolts 26 via a mounting plate 25. The encoder and the origin sensor are built in the cylinder 22 in an actual device. The mounting plate is provided with a long hole 27. By loosening the bolt 26 and moving the mounting plate, the position of the contact is located above the flange shown by a solid line in FIG. 1 and near the flange shown by an imaginary line. And a position above the web.

The NC control device 31 is provided with a lifting motor 8 for the drill heads on both sides.
Are individually controlled, and the intervals between the drill holes 43 and 44 are input from the input device 32 and set in the memory of the NC control device 31. As shown in FIG. 4, the NC control device 31 includes a counter 33 for counting pulses from the encoder, a setting device 34 for setting the height of the origin of the contact, and detecting a difference between the set value and the count value. Difference detector 35 and arithmetic means switching unit
36, a first calculating means 37 and a second calculating means 38 which are alternatively selected by the switch 36, and a drilling calculating means.
39 and.

The origin sensor 24 of the measuring device gives a reset signal to the counter 33. The setting value of the setting device is, for example, a value obtained by adding the height of the spacer to the count value of the counter when the spacer having a known height is placed on the roller 1 and the contact is brought into contact with the upper surface of the spacer. Is set. The output of the difference detector 35 when the setting device is set in this way indicates the height from the upper surface of the roller 1, that is, the mounting surface of the shaped steel to the lower end of the contact at that time. That is, when the contact is in contact with the upper end of the flange, the width B of the flange is the output of the difference detector. When the contact is in contact with the upper surface of the web, the height h of the upper surface of the web is equal to the height of the difference detector. Output.

The first calculating means 37 outputs a value obtained by subtracting 1/2 of the preset web thickness t from the input signal, and the second calculating means 38 outputs 1/2 of the input signal as the output value. The output value of the calculating means 37 or 38 is given to the drilling position calculating means 39 as a value indicating the height of the allocation center of the drill holes 43, 44.

In the apparatus configured as described above, the position of the contact is positioned so as to be above the flange of the section steel sandwiched between the receiving surface and the holding surface, and the arithmetic unit switching device is switched to the second arithmetic unit side. When the drilling process is performed in the state of switching to, the bolt hole drilled in the flange of the shaped steel with a drill,
It is drilled at a position allocated at an equal distance from the center of the width B of the flange. That is, when the presser surface is advanced, the shaped steel is sandwiched, and the contact is moved downward, the counter is reset at the position of the origin sensor, the descending amount of the contact from that position is accumulated in the counter, and the setting of the setting device is performed. The height (width) B of the upper edge of the flange is detected by the difference signal from
The calculating means detects the height of the center of the width B of the flange, and the drilling position calculating means 39 determines the height of the drill head so that the drill holes 43 and 44 are formed at an equal distance from the center of the flange. Control.

On the other hand, when the contact is positioned above the web near the flange and fixed (the imaginary line in FIG. 1), and the switch 36 is switched to the first computing means to perform the drilling, the drill to be drilled is formed. The holes 43 and 44 are allocated and drilled at processing positions conventionally performed, that is, at positions equidistant from the center of the thickness of the web.

<< Effects of the Invention >> As described above, according to the apparatus of the present invention, the position of the drill hole drilled in the web of the shaped steel can be corrected according to the dimensional error of the shaped steel. In the same manner as in the prior art, both the correction based on the center of the thickness of the web of the shaped steel and the correction based on the center of the flange can be performed. Also, it is possible to obtain a drilling device that can meet the demand for connection in such a manner that the step of the flange portion is made as small as possible.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a measuring operation, FIG. 2 is a schematic plan view of the apparatus, FIG. 3 is a schematic front view of the apparatus, FIG. The figure is an explanatory view showing a conventional measuring operation. In the figure, 1: roller, 3: fixed base, 5: movable base, 15: receiving base, 17: presser base, 20: measuring device, 21: contact, 23: encoder, 36: arithmetic means switching device, 37: first arithmetic means 38: second calculation means, 40: shaped steel 41: flange, 42: web 43, 44: drill hole

Claims (1)

(57) [Claims] 1. A fixing table (3) having a receiving surface (15) for holding and fixing a shaped steel (40) placed on a table or a conveying roller (1) and a pressing surface (17). In a correction device for a drilling position of a shaped steel, comprising a movable table (5), and a drilling calculating means (39) for positioning a drill (9) at a position equidistant from the height of the allocation center, a fixed table ( 3) and a moving table (5) are provided with a measuring device (20) having a contact (21) that moves up and down above the section steel (40), and the contact (21) is provided on a flange (41) of the section steel. A detector (23), which is mounted so as to be selectively positioned above the web (42) in the vicinity of the flange and detects the amount of elevation of the contact (21), and a detector based on the detected value of the detector. First and second calculation means for calculating the allocation center height of the drill holes (43, 44) and providing the calculated height to the drilling calculation means (39) Step (37), (38)
And a computing means switching device (36) for selectively inputting the detection value of the detector (23) to both computing means, and the first computing means (37) is configured to determine in advance the given input value The web (4
2) calculating the center height of the thickness center, and the second calculating means (38) calculates the center height of the flange (41) by dividing the given input value by two. Drilling position correction device.