JPH0255699A - Working accuracy confirming method for press work - Google Patents

Abstract

PURPOSE:To improve the efficiency for confirming the accuracy by providing a display mark which becomes a scale of an error quantity, and an indication mark on one working forming die and the other working forming die, respectively, and confirming the working accuracy by a combined shape of a transferred mark. CONSTITUTION:A working accuracy confirming part 11 is formed in a corner part of parts 1 of a floor panel, etc. That is, the working accuracy confirming part 11 is formed by a display mark 12 which is transferred simultaneously by a forming die at the time of first press working, and an indication mark 13 which is transferred and formed by second press working. In this case, the display mark 12 performs a function as a scale of an error quantity of second press working, based on a first press working position as a reference. Also, V-grooves 14, 15 are formed at every X and Y direction as those which indicate an error range at the time of second press working. The working accuracy are confirmed simply and quickly by a combined shape of the indication mark 13 and the display mark 12, therefore, the efficiency for confirming the accuracy is improved.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an IJ method for checking the processing accuracy of press-formed products formed by multiple press-forming processes (technology from IFFI) Automobile body panels When forming a plate material into a desired shape by press processing, the press IIFI
TI 1. It is widely practiced that the process is divided into several pressing steps and the materials are sequentially sent to a press device equipped with the next molding die to finally form the desired shape.

When forming a pressed product using such a method, it is necessary to set the workpiece to the mold in the convex press device with a predetermined precision of 1λ and undergo the specified processing with 5 = ff.
Therefore, it is necessary to appropriately inspect whether the set position of the l')r++ + product between each press device is within a predetermined accuracy or whether it is a cup.

By the way, according to the conventional branch 1 for such inspection, the processed product, instep, or processed product taken out from the press device is set on a gauge positioned on a surface plate, and then measured with a measuring tool similarly positioned on the surface plate. By measuring, it is checked whether the accuracy is within the required accuracy.

(Problems to be Solved by the Invention) However, the cooking method using such conventional technology requires a surface plate, a gauge, etc., and also requires time for measurement.

This invention was made based on this background, and it is possible to check whether a processed product or a product is within a predetermined accuracy without requiring a special measuring tool. This is the purpose.

(Means for Solving the Problems) Therefore, in a workpiece processed by a plurality of press processes, the present invention provides a method for forming a workpiece in either the first press process or the second press process. An indication mark is formed on the mold as a scale for the amount of error between the steps, and an instruction mark corresponding to the indication mark by χ·1 is formed on the mold for the external force processing process, These marks are transferred to the processed product by pressing in these moldings 1~'', and the machining accuracy of the processed product is confirmed from the combination jFa shape of these marks transferred to the processed product. It is.

(Function) Therefore, without performing measurements using special measuring tools, etc., it is possible to determine whether the processed product or product is within the specified accuracy based on the combined shape of the display mark and instruction mark formed on the mold. It is possible to immediately determine and confirm whether or not it is present.

(Example) Hereinafter, an example shown in the figure will be described. This example is an automatic i1. This relates to floor panel parts that make up the vehicle body.

First, with reference to FIG. 4, the overall outline of a floor panel component molded with Gikai I according to the present invention will be explained.

1 is a floor panel part, and this floor panel part 1
The overall shape is composed of a bulging part 2 formed in the center, flat parts 3 formed on both sides, and a flange/jet part 4 bent in the direction 1191 outside the flat part 3. Under this overall shape, a large number of through holes 5 and 6 are formed at predetermined positions.

These shapes and through holes are formed by a plurality of press processes such as punching, bending, drawing, etc., and are divided into culms and formed using respective press machines.

Then, at the diagonal corner (1'/position) of this floor panel component 1, an addition according to the present invention is applied.
1 is formed.

In this way, the machining accuracy confirmation unit 11 checks the floor panel component 1.
The two corners formed at diagonal positions are:
This is to enable highly accurate confirmation of the positioning accuracy of the floor panel component 1 relative to the molding key.

Next, the machining accuracy confirmation portion 11 formed on the floor panel component 1, which is a processed product, as shown in FIGS. 1 to 3 and 5.
I will explain about it.

The processing accuracy confirmation section 11 performs the first press processing 1. It consists of an indication mark 12 which was simultaneously transferred and formed with a mold during the second pressing process, and an instruction mark 13 which was simultaneously transferred and formed with a mold during the second press process.

The display mark 12 is formed in the mold during the first press process. It functions as a scale for the amount of error that occurs.

In this embodiment, since it is sufficient to know whether or not it is within a predetermined error range, the allowable error range for the second press force f is clearly specified, and the rectangular coordinate x-y direction ftj
l: Two long and short V-grooves 14.15 (see FIG. 3) are formed.

On the other hand, in this embodiment, the through holes 6 for mounting the panel formed at the four corners of the floor panel component 1 are formed in the second press working process, so the instruction marks 13 are used to indicate the edges of the panels. It is also used for Mark 13.

The position of the display mark 12 is determined by the direction mark 13.
+tS is formed in the floor panel part II so as to correspond to the position where the barrel through hole 6 is formed (see FIG. 5).

That is, in the case where the instruction mark 13, which is the edge of the through hole 6, cuts a long V groove 14 (see Fig. 2) and does not cut a short V groove 15, the first press work and the second press work are performed. The dimensions of these grooves are determined so that the accuracy of the grooves is within a predetermined error range.

Therefore, the state of the machining accuracy confirmation unit 11 shown in FIG. 1 indicates a state in which the second press work has been performed within the allowable error range on the If it is, it means that it is within the J1 error range, and if it is not, it means that it is outside the allowable error X range.

This also applies to the Y axis.

If a shape that satisfies the above relationship in both the X-axis and Y-axis directions is formed in the machining accuracy confirmation part 11, then the floor panel component 1 has been press-formed within the predetermined f+'1 degree. You can confirm that.

In this way, the addition accuracy confirmation unit 11 of the floor panel component 1
It is possible to immediately confirm whether or not the second pressing process for the first pressing process 1 has been performed within a predetermined accuracy by simply visually checking without using any measuring tool.

Next, the machining accuracy confirmation section 21 of the second embodiment shown in FIG. 6 will be explained.

That is, the machining accuracy confirmation section 21 of this second embodiment has a display mark 22 composed of long and short v1 marks 14.15.
and an instruction mark 23 consisting of a bent edge 25 of a flange portion 24 bent downward at the edge of the workpiece W.

Then, by bending and forming the flange part 24 including the tip 14' of the longer V-groove 14 and not including the shorter V-groove 15, a second part including the formation of this flange part 24 is formed. It can be confirmed that the press work was performed within a predetermined accuracy with respect to the first press work.

Next, the machining accuracy confirmation section 31 of the third embodiment shown in FIG. 7 will be explained.

In this embodiment, the display mark 32 is formed in the X-axis and Y-axis directions of the right angle) 11, one each.
A34, 35, and the J (sa) of these V grooves is within the allowable error range.

On the other hand, the instruction mark 33 is formed of a circular V-groove and is specially formed.

Therefore, in this embodiment, unlike the previously described embodiment, both marks 32 and 33 are formed as dedicated marks, so the processing accuracy can be improved even if either is formed first in the first press process. It does not impair the confirmation function.

In this machining accuracy confirmation device 31, an annularly formed instruction mark 33 and both display marks 32 of predetermined dimensions formed in the X-axis and Y-axis directions! In the case of a state in which T is crossed, the accuracy in the first and second press working steps is maintained within a predetermined range,
If one or both of them do not intersect, it can be confirmed that the predetermined addition accuracy is not maintained.

In addition, the first press process 1-1- and the second press process in the following explanation do not necessarily have to be continuous as the press process J- process, and the display mark may not be used for measurement. Needless to say, it is also possible to implement it as a scale-shaped device.

(Effects of the Invention) As explained below, this invention has a plurality of braces.
In the workpiece processed by the process, the mold for either the first press process or the second press process is marked with a mark that serves as a scale for errors between these press processes. The mark is formed, and the mold for the other processing step 1 has the front, L! Direction marks corresponding to the display marks are formed, these marks are transferred to the workpiece by pressing with these molds, and the modification of the workpiece is determined from the combined shape of these marks transferred to the workpiece. ．． This is to check the accuracy.

Therefore, without performing measurements using special measuring tools, etc., it is possible to determine that the processed product or ``1'' cutting crystal is within the specified accuracy based on the combined shape of the display mark and instruction mark formed on the mold. It is possible to immediately determine and confirm whether or not this is the case.

[Brief explanation of the drawing]

The drawings relate to embodiments of the invention, and FIG.
The figure shows an enlarged view of the machining accuracy confirmation part of the first embodiment of the 1-mm milling process, FIG. 2 is a sectional view taken along If-In in FIG.
Fig. 4 is an overall perspective view of the automobile floor panel which is the processed product of the first embodiment, Fig. 5 is an enlarged view of the display mark of the machining accuracy confirmation section of Fig. 1, and Fig. 6 The figure is the second
FIG. 7 is a perspective view of the processing accuracy confirmation section of the third embodiment. 1; Floor panel parts, 11.21.31 Machining accuracy confirmation section, 12.22, 32; Display mark, 13.23, 33; Instruction mark. Figure 1: F0A8°N/L/Parts

Claims (1)

[Claims] In a workpiece processed by a plurality of press processes, the mold for either the first press process or the second press process has a A display mark is formed as a scale for the error amount, and an instruction mark corresponding to the display mark is formed on the mold for the other processing process, and these marks are printed on the processed product by press working with these molds. A method for checking the machining accuracy of a pressed product, characterized in that the machining accuracy of the workpiece is confirmed from the combined shape of these marks transferred to the workpiece.