JPS61245918A - Measuring method for plate bending shape - Google Patents

Abstract

PURPOSE:To bend a metallic plate with excellent work efficiency by measuring the bending shape with the dispacement gage of the measuring instrument fitted to a presser and by controlling the pressure force of the presser from the result thereof in case of bending a metallic plate with the press device consisting of a recessed face lower die and projecting face presser. CONSTITUTION:A metallic plate material 5 is subjected to bending by placing it on the lower die 1 having a recessed surface and by pressing with the presser 2 having a projecting surface. In this case the main body 1 of measuring instrument is fitted by a sliding member 10 to the supporting frame 3 of the presser 2, an articulated arm body is composed by arms 14a, 14b with the arm holding rod 12 and connecting members 13a, 13b, and a displacement gage 15 is fitted to the tip thereof. The inclination of the bending surface of the metallic plate material 5 is correctly measured under moving the displacement gage 15 to before and behind, to right and left by the articulated arm body and the bending is performed in the prescribed curved surface by moving the metallic plate 5 with handling device 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a sheet bending shape measuring method that can continuously measure the sheet bending shape of a sheet surface during sheet bending on a press.

[Conventional technology]

Plate bending work using a press is performed using a lower die with a concave surface and a presser with a convex surface. For example, when bending a plate material into a cylindrical shape, pressing is repeatedly performed at a constant pitch from the end of the plate material. At this time, during the bending process, a predetermined template is applied to the bending plate (the bent plate material), and the degree of bending (curved shape) is checked while adjusting the pressing amount of the press tool. Then, the bending shape of the bent plate is gradually increased and processed into the final shape.

[Problems to be Solved by the Invention] However, the above-described adjustment of the pressing amount often relies on the operator's experience and intuition, which poses a problem in achieving constant processing quality. In addition, a large amount of work time was required to repeatedly check the bent shape, resulting in very poor work efficiency.

In view of these problems, the present invention provides a sheet bending shape measurement method that can continuously measure the sheet bending shape on a press during sheet bending, thereby improving work efficiency and saving labor. It is about providing.

[Means for solving problems]

In the present invention, a measuring device is installed on a push tool holding frame of a press, and the distance between the arm tip and the plate surface on the press is kept constant according to a signal from a displacement meter attached to the arm tip of the measuring device. Under this control, the tip of the arm is moved in a direction perpendicular to the pushing direction of the pushing tool of the press, and each coordinate of the plate surface on the press is calculated from the amount of displacement of the tip of the arm at this time. It is characterized in that it is calculated and the bent shape of the plate is continuously measured.

[Function of the invention and its effects]

Thus, according to the present invention, the bending shape of a plate material being bent on a press can be determined directly and continuously from the displacement coordinate amount of the arm tip that is moved while the distance from the plate surface is controlled to be constant. Therefore, the bending shape of the plate can be measured without interrupting the press operation, and this measurement information can be fed back to the control of the pressing amount of the pushing tool.

Therefore, it becomes possible to perform plate bending work effectively without relying on the operator's experience and intuition, and it has great practical effects such as being able to obtain plate bent parts of a specified quality with high work efficiency. is played.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a press apparatus constructed by applying the method of the embodiment, in which 1 is a lower mold having a concave shape, and 2 is a pressing tool having a convex surface. This pushing tool 2 is supported by a support pedestal 3 and driven to press in the direction of the concave surface of the lower mold 1, and is held by a handling device [4] and placed on the plate material 5 placed on the concave surface of the lower mold 1 in a predetermined position. The plate material 5 is bent by applying a pressing force of .

However, the support frame 3 has a longitudinal direction (push tool 2
The measuring device main body 11 is movable as appropriate in the horizontal direction (the front and back directions of the page) perpendicular to the pressing direction (pressing direction).
is installed. An arm holding rod 12 supported by the measuring device body 11 so as to be vertically movable in the longitudinal direction is connected to two arms 14a via connecting members 13a and 13b.
, 14b are connected in series, and a displacement meter 15 is provided at the tip via a connecting member 13c to form a multi-jointed arm body. Then, according to the signal detected by the displacement meter 15, the amount of advance and retreat of the arm holding rod 12 and the rotation angle of each connecting member 13a, 13b, and 13c are controlled to control the position of the tip of the arm to which the displacement meter 15 is attached. It has become something to do.

Incidentally, a plurality of displacement meters 15 attached to the tip of the arm are provided so as to be able to measure the inclination angle of the plate surface to be measured, and the angle is adjusted integrally by the connecting member 13c. . In addition, these displacement meters 15 are as follows:
Use an optical type, a non-contact type magnetic type, a differential transformer type, a potentiometer, or a type that can detect the position from the reaction force when pressing a steel ball with a rotatable tip against the plate material, etc. as appropriate. is possible.

The above-mentioned multi-joint arm body is shown in Fig. 2 (
As shown in a) and (b), it is folded and stored and pulled upward, and as shown in FIG. 2(b), it is moved laterally along the sliding member 10 as appropriate.

In the press apparatus configured as described above, when the plate material 5 is pressed by the pushing tool 2, the tip of the multi-joint arm body is controlled to descend, and the displacement meter 15 attached to the tip and the plate material 5 are controlled to descend. It is controlled so that the distance from This control is performed according to a distance detection signal with respect to the plate material 5 detected by the displacement meter 15. For example, as shown in FIG. 3, the difference between the detection signal of the displacement meter 15 and the set value is determined by a calculator, and the amount of movement of the multi-joint arm body is feedback-controlled so that the difference becomes zero (0). It will be done as follows.

Under this control, that is, while keeping the distance between the plate material 5 and the displacement meter 15 constant, the tip of the multi-joint arm body is moved in a direction perpendicular to the pressing direction of the pushing tool 2, that is, along the bending direction of the plate material 2. The change in the position coordinates of the tip of the arm at this time is detected. This position coordinate change is calculated from the rotation angle of each connecting member 13a, 13b, 13c of the multi-joint arm body and 31m1 of the arm holding rod 12. The movement locus of the tip of the arm measured in this way corresponds to the bent shape of the plate 5 because the distance between the displacement meter 15 and the plate 5 is kept constant as described above. The bent shape of the plate material 5 is measured here.

If the plate material 5 to be measured is wide, the main body 11 of the measuring device is moved in the width direction via the sliding member 10 according to the set value as shown in FIG. A similar measurement is performed by moving in the width direction of 5.

After measuring the bending shape of the plate material 5 in this way, the multi-jointed arm body is stored, and the pressing force of the pressing tool 2 is set based on a predetermined press control algorithm according to the measurement results, and the pressing operation is performed. Repeat.

According to such a plate bending shape measurement method, it is possible to effectively and accurately measure the bending shape of the plate material 5 set in a press and to control the pressing operation. Moreover,
The bending shape of the plate material 5 in a narrow space on the press can be directly measured over a wide area by the displacement meter 15 attached to the tip of the arm. Furthermore, since the multi-jointed arm body can be folded and stored when not measuring, there is no problem in actual press work.

Therefore, it is possible to temporarily interrupt the press work, measure the bending shape of the plate material 5 due to the press work while maintaining that state, and adjust the pressing force of the push tool 2 according to the measurement results. Effects such as being able to proceed with the work efficiently without requiring the operator's experience or expertise can be achieved.

Furthermore, since the aforementioned multi-joint arm body is attached to the support frame 3 of the pushing tool, its positional relationship with respect to the press device is uniquely determined. Therefore, the reproducibility of repeated measurements is excellent,
The measurement accuracy can also be made sufficiently high.

Note that the present invention is not limited to the embodiments described above. For example, it is sufficient to use a displacement meter that is suitable for its use, and the configuration of the multi-jointed arm body can also be modified in various ways. In addition, the position control method of the arm tip can be modified in various ways.In short, when the distance from the arm tip to the plate surface is kept constant and the arm tip is moved along the plate surface, the position coordinate displacement of the arm tip is detected. All you have to do is do it. In addition, various modifications can be made without departing from the gist of the invention.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic diagram of a press machine incorporating a shape measuring device, Fig. 2 is a schematic diagram of its main parts, and Figs. 3 and 4 are respectively It is a figure showing the example of composition of the control part of a multi-joint arm body. DESCRIPTION OF SYMBOLS 1... Lower mold, 2... Pushing tool, 3... Pushing tool support frame, 4... Handling device, 5... Plate material, 10.
...Sliding member, 11... Measuring device main body, 12... Arm holding iron, 13a. 13b, 13cm...Connecting member, 14a, 14b...
Arm, 15...Displacement meter. Applicant Sub-Agent Patent Attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] According to the signal from the displacement meter attached to the arm tip of the measuring device attached to the push tool holding frame of the press, the arm tip is moved to the above position while keeping the distance between the arm tip and the plate surface on the press constant. The press is moved in a direction perpendicular to the pushing direction of a pushing tool of the press, and the coordinates of the plate surface on the press are calculated from the displacement amount of the tip of the arm at this time, and the plate bending shape is measured. Method for measuring plate bending shape.