JPH0549407B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for automatically drilling bolt holes, etc. in steel sections such as H-shaped steel, channel steel, and angle steel.

Conventionally, hole positioning methods for this type of device can be broadly classified into the following two types. The first method is
Multi-axis drilling heads are installed on the right, left, and top sides of the fixed portal frame, and the pitch of the holes in the transverse direction of the section is set in advance during setup, and the entire section is drilled at that pitch in the longitudinal direction. The second method is to manually transport the shaped steel into the machine, fix it in a vise, and move it to the drilling head mounted on a slidable cross slide device. This method performs positioning by moving the

In the first method of the former, it is possible to position the long section steel over almost the entire length in the longitudinal direction, but on the other hand, the section steel itself is moved back and forth for positioning.
In particular, when the steel section to be machined is of various sizes, such as H-section steel, its inertia changes significantly, resulting in a large positioning error.

The latter second method always allows highly accurate positioning regardless of the size or length of the shaped steel. Especially H
Drilling work for shaped steel is not a process of continuously drilling a large number of holes over the entire longitudinal direction, but a process of drilling a group of holes in a predetermined pattern P at several locations in the longitudinal direction, as illustrated in Figure 1. In most cases, this second method is suitable for positioning within such a predetermined pattern of holes. However, the shaped steel must be moved between hole groups in a predetermined pattern either manually or by a conveyor, and it has not been possible to perform all drilling work on long shaped steel etc. in a fully automatic manner.

The present invention has been made in view of the above points, and an object of the present invention is to provide an automatic drilling device that can drill holes over the entire area of long shaped steel, etc., fully automatically and with high precision.

In order to achieve this objective, the present invention provides a drilling device that is disposed on both sides of the section steel in the longitudinal direction, and that displaces the drilling head in the longitudinal direction and the transverse direction of the section steel to form holes in a predetermined pattern on at least two sides of the section steel. Furthermore, on both sides of the main vice mechanism installed in the longitudinal direction of the section steel,
The first type operates independently of each other to clamp and convey the section steel by a preset distance between the perforation patterns.
and a second sizing means, a section steel detection device for detecting passage of the end face of the section steel at a predetermined position, and a section steel sizing operation based on the detection output from the first sizing means. A selection means for changing to the second sizing means is provided, and after completion of drilling a predetermined pattern with the fixed state of the section steel, either the first or second sizing means is selected depending on the front end or rear end position of the section steel. By transporting the shaped steel a predetermined distance by the machine, the drilling is carried out with high precision and fully automatically from the starting end to the end, including the center, regardless of the length or size of the shaped steel. It is characterized by being configured so that it can be carried out.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a front view of essential parts of the embodiment of the present invention, and FIG. 3 is a view taken along the line A--A. FIG. 4 is a block diagram showing the configuration of a control circuit according to an embodiment of the present invention.

A main vice stand 2 is fixed on the base 1,
Two pairs of main vices 3a and 3b are installed on the main vice stand 2 at a predetermined interval.
The material to be processed, for example, the H-shaped steel W, is clamped and fixed by a and 3b. These main vises 3a, 3
A command to attach and detach the workpiece to and from the main vise is transmitted from the central control unit 21, and a clamping signal for the workpiece W is generated from the main vise and output to the central control unit 21. At a position between the two pairs of main vises 3a and 3b, a first cross slide 4a is provided on one side of the workpiece W, for example, on the right side in FIG.
A second cross slide 4b is provided on the other side of the workpiece W, for example, on the left side, and a third cross slide 4c is provided on the portal frame 5 that straddles the workpiece W. These first, second and third cross slides 4a, 4b and 4c have first, second and third drilling heads 6a, 6b, respectively.
and 6c, and the drill bits 7 attached to the respective drilling heads are slidably displaced on a plane perpendicular to the respective rotational axes, and are moved in the direction of the respective rotational axes with respect to the workpiece W. It is configured so that the feed is given. These displacement and feed drives are performed independently of each other by a hydraulic cylinder device or a feed screw by an electric motor.

The positioning of each cross slide 4a, 4b and 4c on each sliding plane is carried out by a drilling position control device 8a, 8b and 8c provided respectively. That is, the first cross slide 4a
Taking this as an example, a detector mounting rod 9 is provided on the drilling head 6a, a photoelectric detector consisting of a light emitter 10a and a light receiver 10b is attached to the detector mounting rod 9, and the light emitter 10a
A perforation position designation plate 11 is inserted between the light receiver 10b and the light receiver 10b. The punching position designation plate 11 has marks corresponding to the stop positions of the punching head 6a arranged on a flat plate, and is a punch plate made by punching holes in a thin metal plate. Mark the hole position designation plate 11 on the cross slide 4.
A photoelectric detector searches by the movement of a to control the stopping position of the drilling head 6a. Each of the drilling heads 6a, 6b and 6c independently performs drilling in a predetermined pattern based on instructions from the central control unit 21 in accordance with the information written on the drilling position designation plate 11 as described above, When all the holes in each predetermined pattern are completed, a hole completion signal is generated and sent to the central control unit 21.

First and second sizing vise stands 1 are located at the front and back of the main vises 3a and 3b on the outside of the workpiece W in the longitudinal direction.
The first and second mounted on 2a and 12b
Sizing vises 13a and 13b are provided. The first and second sizing vice stands 12a and 12b are provided so as to be able to slide back and forth on the conveyor stands 14a and 14b, respectively, along the longitudinal direction of the workpiece W, and each is driven by a hydraulic cylinder device or an electric motor. This is done independently by the feed screw. First and second sizing vices 13a and 1
3b is constructed such that one of them clamps the workpiece W and transports it a predetermined distance from the left to the right in FIG. 2, according to a command from the central control unit 21.
This conveyance distance can be set by setting the strokes of the first and second sizing vice stands 12a and 12b. Second sizing vise 13
A photo switch 15 for detecting the passage of the end face of the workpiece W is provided near b, and its output is led to the central control section in FIG. 2.

Next, the operation of the embodiment of the present invention will be described according to the flowchart shown in FIG.

First, when the workpiece W is set at a predetermined position and a start command is given, the main vise clamps and fixes the workpiece W, and a workpiece clamping signal is sent from the main vise to the central control unit 21. It is confirmed that the workpiece is caught. Next, the first, second and third drilling heads 6a, 6b and 6c operate independently according to the information written on the drilling position designation board 11 set in the respective drilling position control devices 8a, 8b and 8c. holes in a predetermined pattern. Each of the drilling position control devices 8a, 8b and 8c issues a drilling completion signal when all drilling of the hole group of each pattern is completed, and the drilling end signal is sent to the central control unit 2.
1, the central control unit 21 controls the main vise and the first sizing vise stand 12 at the time when it receives the drilling end signals from all the drilling position control devices.
a. Issue a command to the sizing vise 13a and
The WW is conveyed by a predetermined distance, that is, the distance between the perforation patterns. This feeding of the material may be performed by one stroke of the first sizing vice table 12a, or may be performed by multiple strokes.

When such sizing operation is completed, the workpiece W
is clamped in the main vise again, the above-mentioned predetermined pattern of drilling is performed, and when the all-drilling completion signal is issued, the above-mentioned sizing operation is performed again, but the workpiece W
After the tip end surface of the photo switch 15 passes through and the detection signal is sent to the central control unit 21, the second sizing vise 13b is already ready to grip and convey the workpiece W. Therefore, after the detection signal arrives, the second sizing vise 13b is automatically selected and performs the sizing operation of the workpiece W. This makes it possible to fully automatically feed the workpiece W by a fixed length for drilling from the starting end to the end including the intermediate part.

By repeating the above operations, a predetermined pattern of holes are bored in the workpiece W at a plurality of arbitrary locations in the longitudinal direction.

What should be noted here is that the first and second sizing vises 13a and 13b operate independently of each other based on commands from the central control unit 21, and the workpiece W
This configuration is configured to perform the sizing operation, and with this configuration, while one sizing vise is pinching and conveying the workpiece W, the other sizing vise is required. It is now possible to wait at the optimal position according to the sizing operation, and one workpiece W can be
The sizing operation is carried out in a short time without any waiting time, based on the optimal operation with no waste, including not only the sizing operation for the workpiece but also the operation of carrying the next workpiece W into the equipment. It becomes possible to do this.

In the above embodiment, a photo switch for detecting the end face of the workpiece is provided near the second sizing vise, and after detecting the front end face in the transport direction of the workpiece, the second
This photo switch is installed near the first sizing vise to detect when the rear end of the workpiece has passed, and then The second sizing vise may be used to perform the sizing operation.

In addition, a drilling device that controls the position of the drilling head according to information written in a storage device and independently performs drilling in a predetermined pattern on at least two sides of a section steel adopts an independent positioning method using numerical control. Good too.

As explained above, according to the present invention, the main vise, which is provided in front and behind the drilling device that performs drilling in a predetermined pattern by controlling the position of the drilling head, further clamps the shaped steel in the front and rear of the main vise. In addition to providing first and second sizing means for transporting and positioning the section by a preset distance, the sizing means is provided independently from each other based on the output of the detection means for detecting passage of the end face of the section steel at a predetermined position. Since a selection means for selectively driving either the first or second sizing means is provided, the section steel can have a highly accurate pattern obtained by controlling the head position in a fixed state. Not only is the hole drilled, but between the patterns, for example, the sizing operation is initially performed by the first sizing means on the upstream side in the direction of conveyance of the section steel, and the front end surface of the section steel is moved by the second sizing means. After passing through a position where sizing operation can be performed depending on the installation position, the second sizing means downstream of the drilling device is automatically selected to perform sizing operation, and the entire length of the section steel is determined. Based on a relatively compact configuration with a short device length compared to
It is now possible to consistently automatically feed the section until the rear end of the section passes through the drilling device installation position, so that the center section can always be machined from the starting end to the center, regardless of the size or length of the section to be machined. It is now possible to drill holes at any position, including the end, fully automatically and with high precision. Moreover, since the first and second sizing vise mechanisms operate independently of each other, while one sizing vise mechanism is performing sizing operation,
The other sizing vise mechanism is used to prepare for the next required sizing operation or to carry in the next section.
It can be kept on standby at the optimal position, including when switching between the first and second sizing vise mechanisms.
It is possible to realize short-time sizing operations that do not require waiting time based on efficient and optimal operations.

[Brief explanation of the drawing]

Figure 1 is a diagram showing an example of the drilling position of H-beam steel, Figure 2
The figure is a front view of the main part of the embodiment of the present invention, and Fig. 3 is its A.
4 is a block diagram showing the configuration of the control circuit according to the embodiment of the present invention, and FIG. 5 is a flowchart showing the operation of the embodiment of the present invention. 3a, 3b...Main vice, 6a, 6b, 6c...
...first, second and third drilling heads, 8a, 8b,
8c...first, second, and third drilling position control devices,
10a... Emitter, 10b... Light receiver, 12a,
12b...first and second sizing vice stands, 13
a, 13b...first and second sizing vices, 15...
...Photo switch, 21...Central control section.

Claims (1)

[Claims] 1 According to the information written in the storage device, the position of the drilling head with respect to the clamped and fixed shaped steel is controlled in the longitudinal direction of the shaped steel and in the orthogonal direction thereof, so that holes in a predetermined pattern are formed on at least two sides of the shaped steel independently of each other. a main vice mechanism that is installed at the front and back of the drilling device in the longitudinal direction of the section steel to clamp and fix the section steel; first and second sizing means that operate independently to sandwich and convey the shaped steel by a distance between preset drilling patterns; a shaped steel detection device that detects passage of an end face of the shaped steel at a predetermined position; an AND detection device that detects that a drilling completion signal, which is output when all drilling of the predetermined pattern on a certain drilling surface is completed, is output for all the drilling surfaces; comprising a selection means for automatically switching the sizing operation from the first sizing means to the second sizing means, and performing drilling in the predetermined pattern with the section steel fixed; Second
By repeating the process of automatically selecting one of the sizing means and transporting the section steel to the position where the next pattern of drilling will be performed, it is possible to automatically perform drilling from the start end to the end of the section steel. Automatic drilling equipment for configured section steel.