JPS6171979A - Automatic marking-off device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a scribing device, and particularly to an automatic scribing device using a press NC turret punch press.

[Background of the invention]

Conventionally, marking processing of thin sheet metal (stat, prona, seat,
Reinforcement, etc.) was done manually using a scriber and scale, a doscan, or a manual punch. For this reason, work efficiency was extremely low, and it was also a factor in the occurrence of defects due to omission of work.

In addition, when marking using a turret haunch, adjust the punch stroke of the turret punch depending on the thickness of the workpiece.
Since the mold is set while testing, setup time increases and setup changes occur frequently, and great care is required to prevent accidents (see Japanese Patent Laid-Open No. 57-89576).

FIG. 3 shows a general scribing method using a manual punch. Specifically, a working plate gauge 2 is placed on the reference surface of the work 1.
The manual punch 3 is inserted into the positioning hole and strong pressure is applied to perform the scribing process and form a scribing mark.

In this case, a large number of plate gauges are required depending on the size of the workpiece and the marking pitch, resulting in problems such as increased setup time and low work efficiency.

On the other hand, in the marking process using a marking punch attached to a turret punch, as shown in Figure 4, all of the pressurizing force of the NC turret punch is applied to the workpiece, resulting in a dent 17 on the opposite side of the workpiece, which requires correction. This is a major impediment to automation.

In Fig. 4, 1 is a workpiece, 4 is a marking punch, and 5 is a lower die.

[Purpose of the invention]

An object of the present invention is to provide an automatic scribing device that eliminates the need to adjust the punch stroke of a turret haunch press depending on the thickness of the workpiece.

[Summary of the invention]

The present invention is capable of automatically punching the upper and lower punches set in the turret without adjusting the punch stroke even if the thickness of the workpiece is different. At the same time as marking the
The punch unit has a built-in urethane rubber that absorbs the pressing force of the turret punch plate, which prevents dents from appearing on the work surface on the opposite side of the punch, and also features scribing processing.

[Embodiments of the invention]

The present invention will now be described in detail.

FIG. 1 and FIG. 2 are one example of solving the above-mentioned problem.

That is, the NC turret haunch press automatically selects the upper and lower molds and continuously performs scribing from the upper and F sides of the workpiece.

In FIG. 1, a scribing punch 11 is built into the lower mold, and scribing is performed from the lower surface (back side) of the workpiece.

The upper die is a general punch with an improved die structure, and the upper punch 6, which moves up and down along the inner surface of the punch guide 7, does not hit the bottom of the punch guide 7 even when it is at the bottom dead center position. It is sized. The pressing force of the upper mold becomes the force of the punch guide 7 (plate holder) and does not deform or damage the workpiece.

On the other hand, the lower mold has a scribing punch 11 and a urethane spring 12 built into the die holder 5, and has a structure in which the pressing force of the plate presser punch guide 7 is absorbed by the urethane rubber IJ y group 12. When performing marking processing, the first
As shown in the figure, a workpiece 1 is set on a lower die and is pressed by an upper die punch guide 7.

If scribing is performed in this state, the scribing mark will be clearly placed on the back side of the workpiece, and no dents will be left on the front side.

By repeating this process, it becomes possible to perform the necessary marking process continuously.

In addition, in Fig. 1, 8 is a spring, 9 is a punch head, and 1
0 indicates an air vent hole when the upper punch slides, 13 indicates a set screw, and 14 indicates a bolt with a hole.

FIG. 2 shows a structure in which a scribing punch 11 is built into the upper die to perform scribing from the surface of the workpiece, and the upper die and lower die shown in FIG. 1 are integrated.

That is, an upper die having an upper punch that slides on the inner surface of the punch guide 7, a scribing punch 11, and a die holder having a urethane spring 12 are integrated.

In Fig. 4, 8 is a spring, 9 is a punch head,
10 is an air vent, 15 is a locking screw, and 16 is a lower die.

When it became possible to automate the marking process using an NC turret haunch press, it became possible to incorporate the marking process, which was a post-can manufacturing process, into the initial process line in the sheet metal processing line for control panels and switchboards, and it was possible to incorporate cutting, drilling, tapping, and other processes into the initial process line. An integrated line has been established that includes scribing, deburring, and 2 bending, making it possible to significantly reduce the number of man-hours.

Another feature is that marking can be performed from both the front and back sides of the workpiece, so after marking, the workpiece can be sent to the next deburring process without having to be turned over.

In addition, the stat, burona, seat, which is subject to marking processing,
Most of the reinforcement is attached to the back side of the workpiece, and by marking from the bottom (back side) of the workpiece, it can be processed without damaging the workpiece surface. It is also highly effective as a measure to prevent scratches.

Next, an example of a work in which marking is performed using an upper mold will be explained with reference to FIG.

(4) For workpiece 1 to be bent in the order of (B), (C), and (2), if the rising dimension of eL bending and 2 bending is small as shown in ■), after bending, drill a hole with a drilling machine. Work occurs. (When bending after drilling with a turret punch press, if the upright dimension is small, the hole will be pulled in the bending direction and deformed.) In order to cope with this, the mold shown in Figure 2 was
Set it on the turret punch press and perform the marking process.

Figure 6 shows the marking punch 11 used in Figures 1 and 2.
An example of the shape of work 1 and the state in which workpiece 1 has been marked is shown. (
B) is for Stat, Prona, [F]) is for Komei, (C
) is for member positioning, and (c), ■) is for member black.

Alphabets and numbers can also be used as matching marks for parts. Particularly when counting a large number of different types, matching marks (alphabet marks) are used for parts with similar shapes.

Marking the numbers (numbers) has the effect of making them easier to identify.

〔Effect of the invention〕

According to the present invention, - In a continuous sheet metal processing line, N
The C turret punch press allows for efficient marking.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the upper and lower molds when marking is performed from the bottom side according to the present invention; Fig. 3 shows a conventional manual marking method, Fig. 4 shows a conventional turret punch marking method, and Fig. 5 shows an example of marking from the top and side. , FIG. 6 is a diagram showing the shape of the scribing punch and the state in which the scribing punch is beginning to be scribed on the workpiece. 6... Upper punch, 7... Punch guide, 8... Spring, 9... Punch head, 10... Air bleed hole, 11... Marking punch, 12... Urethane spring, 13... ...Push screw, 14...Bolt with hole,
15... Locking screw, 16... Lower die, 17...
- Bruises.

Claims (1)

[Claims] 1. In an automatic scribing device that performs scribing on thin sheet metal used for control panels, switchboards, etc., a preset punch die is automatically selected depending on the thickness of the workpiece. 1. An automatic scribing device comprising: a means for scribing the work from both the back and front sides of the work by using the holding force of a punch plate. 2. The automatic scribing device according to claim 1, wherein the punch molds are installed above and below a turret.