JPH01193108A - Method for positioning tool around center of web thickness of shape steel - Google Patents

Abstract

PURPOSE:To perform positioning of a working head tool around the center of web thickness with a simple structure by measuring inertia movement of the working head under the condition where one side of a shape steel web is detected by a detector, and stopping the working head in consideration thereof. CONSTITUTION:An axial center position 73 is brought into coincidence with, e.g., a shape steel support reference face 75 by lowering a drill unit 17. Next, a web measuring unit 39 is lowered by driving a cylinder 37, and a measuring member 51 is abutted against the upper face of a web member 33 and stopped, then after the stoppage, a drill unit 17 is rised at a specified low speed. When an operation member 65 pressurizes a detection unit 69 to generate ON or OFF state, rising drive of the drill unit 17 is stopped, but there is overrun. Next, a time until the unit 69 generates OFF or ON signals is measured after the unit 17 is lowered at a specified low speed, thereby inertial movement (b) is operated, and then the lowering is stopped. It is possible to set the drill to the center of web thickness by lowering the unit at the specified low speed, and thereby generating stoppage signals at the position before the dimension (b) from the center of the web thickness.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to a method for positioning a tool of a processing head at the center of the web thickness of an H-section steel, for example, and more specifically, This invention relates to a method that allows for quick positioning by taking into account errors in the amount of inertial movement when the movement is stopped.

(Prior Art) When drilling a 7-lunge of a section steel, for example, an H-section steel, the drilling position is positioned at a center distribution based on the center of the web thickness. Therefore, it is necessary to detect the center position of the web thickness and position a tool such as a drill of the machining head at the center position as a reference position. In this case, the dimension from the reference plane to the center of the web thickness is calculated by measuring the dimension from the reference position to one side of the web and adding the previously measured dimension of the web thickness. A tool such as a drill was positioned at a certain position.

(Problems to be Solved by the Invention) The conventional method as described above requires a device for measuring the dimension from the reference position to one side of the web, resulting in a problem that the configuration becomes complicated. In addition, when one side of the web is detected and a dog is set, for example, and a detector such as a limit switch provided in the processing head is activated by the dog, the processing head is stopped and a drill or the like is set at the center of the web thickness. A method of positioning the motor has also been used, but this method has the problem that there is movement due to inertia from the time the stop signal is received to the time the motor actually stops, making accurate positioning difficult.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above-mentioned problems, in a state in which one side of the web of the section steel is detected by a detection device, the inertial movement of the processing head is By measuring the amount of inertial movement and stopping the processing head in consideration of this amount of inertial movement, the tool provided in the processing head is positioned at the center of the web thickness.

(Example) First, the configuration of an apparatus capable of implementing the method of the present invention will be described in detail.

The shape steel processing 1111 shown in Fig. 1.2.3 is performed by providing a beam portion 7 on one side of the main body base 3 via a fixed column 5, and providing a movable column 9 on the other side of the main body base 3. It is structured in the form of a gate.

The fixed column 5 and the movable column 9 are machined so that they can be moved up and down by a lead screw 15 that is guided by a vertically erected guide bar 11.11 and driven by, for example, a hydraulic motor 13. A drill rig ff17.17 as an example of the head is provided oppositely.

The drill equipment RA 17 described above is composed of a drill head 19, a fluid pressure cylinder 21 for expanding and contracting the drill head 19, and a drive motor 23.

The beam portion 7 is provided with a drill device Wt17 supported by a horizontal guide bar 25 and driven by a lead screw 15 to move and position from side to side. It includes a cylinder 21 and a drive motor 23.

A fixed vice frame 27 fixed to the main body base 3 and a movable vice frame 29 that can move toward and away from the fixed vice frame 27 are provided inside the drill device 17 that is provided facing each other on the left and right sides. Then, a shaped steel 31 such as an H-shaped steel is gripped and fixed with its web portion 33 horizontal.

As clearly shown in FIGS. 2 and 3, a vertical guide post 35 is provided on one side (lower side in the example shown in FIG. 3) of the fixed vise frame 27 and the movable vise frame 29. A web measuring device 39 is provided which is guided by the guide post 35 and driven by a fluid pressure cylinder 37 to be movable up and down.

The web measuring device 39 described above has the same size and shape on both the left and right sides, and only the one provided on the fixed vise frame 27 is shown in FIG.

Web measurement wave! 39 is a cylindrical slide sleeve 41
It moves up and down along the guide post 35 described above.

Flange plates 43 are attached to the upper and lower ends of the slide sleeve 41.
．． 45, a swing shaft 47 is provided between both plates, and a gauge head 51 is provided hanging from the swing shaft 47 via a support plate 49, and the upper flange plate 43 has a swing shaft 47 as shown in FIG. The split groove 53 is provided so that the swing shaft 47 can be swung and fixed by the lock handle 55.

This ability to freely swing allows the compact toy shown in Figure 1 to
Even when measuring the web height of the type 11131-, it is possible to separate the measuring elements 51 on both sides to positions where they do not interfere with each other.

As shown in FIG. 2, on the opposite side of the swing shaft 47 between the guide posts 35 and the guide posts 35, there is an upper flange plate 43.
is connected to the piston rod 57 of the fluid pressure cylinder 37, and from the right end of the upper end plate 59 of the guide post 35 in FIG. A letter-shaped rail 61 is provided.

In addition, the lower flange plate 45 of the slide sleeve 41
A placket 63 is provided toward the right side, and hangs down from the middle to hold an actuator 65, such as a dog, at its lower end in a position-adjustable manner.
A roller device 67 is provided for clamping.

Therefore, the placket 63 and the actuator 65 integrally move up and down and stop as part of the wedge height measuring device 39. The vertical dimensions of the actuator 65 and the measuring element 51 are set to a predetermined dimension, for example, I (not shown).

A detection device 69 that engages with the aforementioned actuator 65 is attached to the m1 surface of the fluid pressure cylinder 21 of the drill device 17. It should be noted that what is shown at the upper right corner of FIG. 1 is a pendant-type control box 71.

Although not shown, the drill equipment W117 includes heavy items such as a fluid pressure cylinder 21 and a drive motor 23, and is moved up and down by the hydraulic motor 13 and lead screw 15. Since the inertia movement distance is different when ascending and descending, a balance device (not shown), such as an air cylinder, that balances and supports the weight of the drill equipment W, 17, so that the inertia does not change between ascending and descending. (omitted) is provided.

In order to detect and position the drill axis of the drill device 17 at the center of the web thickness using the section steel processing machine 1 described in detail above, the following operation is performed according to the procedure stored in the built-in computer, and further parameters are set. Make me remember.

Detector first? To attach If69 to the fluid pressure cylinder 21 of the drill device 17, the axis center position of the drill r! 173
The center is placed and fixed at an appropriate position, for example, about 201111 above, and the actuator 65 is also engaged and pressed during the upward movement of the detector 69, as shown in FIG. It is fixed so that the height position is approximately the same as the height B of the flange portion of the shaped steel 31.

Next, a method for positioning the drill (tool) of the drill device 17 at the center of the web thickness will be explained.

First, as shown in FIG. 4, the drill device 17 is lowered, and an appropriate portion such as the lower end surface of the fluid pressure cylinder 21 is brought into contact with an abutment stopper (not shown) to adjust the axial center position 73 of the drill, for example. Shape steel support reference surface 7 of main body base 3
5 and is stopped by the signal from the pressure switch of the hydraulic motor 13.

Next, the fluid pressure cylinder 37 is driven and the web measuring device w!
39 is lowered to bring the probe 51 into contact with the upper surface of the web portion 33 and stop. After stopping, the drill is installed! 17 for example 21
Raise at a constant low speed such as /min.

FIG. 5 shows that the actuator 65 presses the detection device 69 and
This is a stage diagram showing when the drill device 17 is in the N or OFF state. Although the upward drive of the drill device 17 is stopped by this ON or OFF state, there is an overrun before the upward movement actually stops due to inertia. That is, if the amount of inertial movement of the drill device 17 in this case is b, then the dimension from the top surface of the web 33 to the stop position of the drill device 17 is (H+l)).

Next, the drill device 17 is moved at a constant low speed (ar+/
sin), and the detection device 69 is OFF or OFF.
The time until the N signal is issued is measured, the inertial movement zb is calculated, and the descent of the drill device 17 is stopped. At this time, the dimension from the top surface of the web 33 to the stopping position of the drill device 17 is (H-b).

FIG. 6 shows the stage when the detection device 69 issues the above-mentioned OFF or ON signal, and the subsequent stage when the web measuring bag rI! , 39 are raised and returned, and a state where the axis position 73 of the drill of the drill device 17 is lowered by a dimension x to a position that coincides with the web thickness center line 77. In this case, when the thickness of the web 33 is t, the dimension X is x = (H
-b 10t/2).

As already understood, the amount of inertial movement of the drill device 17 at a constant low speed is b, which is constant, so to align the drill with the center of the thickness of the web 33, the position of the dimension from the center of the web thickness What is necessary is to issue a stop signal at this point. That is, the drill device 1 is placed at the above-mentioned stop position.
7, the web 3 is lowered at a constant low speed.
By issuing a stop signal when the drill reaches a position (H+t/2-2b) from the center of the web, the drill can be aligned with the center of the web thickness (Figures 6 and 7).

[Effects of the Invention] As understood from the above embodiments, according to the present invention, the amount of inertial movement of the machining head (drill device) at a constant low speed is measured, and the amount of inertial movement of the machining head is taken into consideration. Since the tool is aligned with the center of the web thickness, even if the position of the web changes, by measuring the web thickness in advance, the processing head can be aligned with the center of the web thickness with a simple configuration. It allows for quick and accurate positioning.

[Brief explanation of the drawing]

Fig. 1 is a front view of a section steel processing machine that can carry out the present invention;
The figure is a front view of the web measuring device same as above, FIG. 3 is a plan view taken from arrow 11 in FIG. 2, FIG. 4 is an explanatory diagram showing the operating state, FIG. The explanatory diagram, FIG. 7, is an explanatory diagram when the drill axis is aligned with the web thickness center. 17... Drill device 33... Web 39.
...Web measuring device 63...Bracket 65...
- Actuator 69...Detection device representative Patent attorney Yasuo Miyoshi Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] A positioning method for positioning a tool of a processing head at the center of web thickness in a section steel, characterized by comprising the following steps. (a) A measuring element 51 located corresponding to the inside of the flange of the section steel so that its tip can come into contact with one side of the web of the section steel, and an actuator 65 or A step of moving the web measuring device 39, which is integrally equipped with a bracket 63 equipped with a detection device, in a direction perpendicular to one side surface of the web, and bringing the tip of the measuring element 51 into contact with one side surface of the web. . (b) The processing head 17 is moved at a predetermined speed in a direction perpendicular to one side of the web and in a direction approaching the actuator 65 or the detection device, and the detection device 69 or the actuation device provided in the processing head 17 is A step of stopping the movement of the processing head 17 when the detection device is turned ON or OFF by acting on the actuator 65 or the detection device provided on the bracket 63. (c) In order to measure the amount of inertial movement at the time of stopping, the processing head 17 is moved at the predetermined speed in the opposite direction from the stop position until the detection device is turned OFF or ON, and at the time of starting movement in the opposite direction. The detection device is turned off from
Or the process of measuring the time until ON operation. (d) Calculate the amount of inertial movement of the processing head 17 at the predetermined speed, and the dimension in the moving direction of the processing head 17 from the tip of the measuring element 51 to the actuator 65 or detection device provided on the bracket 63 , the thickness of the web, and the amount of inertial movement, the processing head 1
7 in the direction of the web thickness center at the predetermined speed to align the tool with the web thickness center.