JPH0825079B2 - How to check the processing accuracy of pressed products - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of confirming the processing accuracy of a pressed product formed in a plurality of pressing processes.

(Prior Art) When a plate material is formed into a desired shape by press working, such as an automobile body panel, the press working process is divided into several press working processes, and the plate material is mounted in order by the following molding dies. It is widely carried out that the material is sent to a pressed machine and finally formed into a desired shape.

When molding a pressed product by such a method,
It is necessary to set a semi-finished product with a predetermined accuracy for the mold in each press machine and receive a predetermined processing,
It is necessary to properly inspect whether the set positions of the semi-processed products between the respective press devices are within a predetermined accuracy.

By the way, according to the prior art for such inspection,
Check whether it is within the required accuracy by setting the processed product or semi-processed product taken out from the press machine to the gauge positioned on the surface plate and measuring it with the measuring tool also positioned on the surface plate. are doing.

(Problems to be Solved by the Invention) However, such inspection by the conventional technique requires a surface plate, a gauge, and the like, and also requires time for measurement.

The present invention has been made based on such a background, and an object thereof is to make it possible to directly check whether or not a processed product or a semi-processed product is within a predetermined accuracy without requiring a special measuring tool. It is a thing.

(Means for Solving the Problem) Therefore, according to the present invention, in a processed product processed by a plurality of pressing steps, a molding die for one of the first pressing step and the second pressing step. Is formed with a display mark serving as a scale of an error amount between these press working steps, and an instruction mark corresponding to the display mark is formed on the molding die of the other working step, and press working is performed with these molding dies. By doing so, these marks are transferred to the processed product, and the processing accuracy of the processed product is confirmed from the combined shape of these marks transferred to the processed product.

(Operation) Therefore, the processed product or the semi-processed product is within the predetermined accuracy from the combined shape of the display mark and the instruction mark formed on the molding die without performing the measurement using a special measuring tool or the like. Whether or not it can be determined and confirmed immediately.

(Example) Hereinafter, one example shown in the drawings will be described, but this example relates to a floor panel component constituting a vehicle body of an automobile.

First, referring to FIG. 4, a general outline of a floor panel component molded by the technique according to the present invention will be described.

Reference numeral 1 denotes a floor panel component. The floor panel component 1 includes a bulging portion 2 bulging in the center, flat portions 3 formed on both sides thereof, and a flange bent upward on the outside of the flat portion 3. The portion 4 and the whole shape are formed, and a large number of through holes 5 and 6 are formed at predetermined positions under the whole shape.

Then, these shapes and through holes are formed by being divided into a plurality of press working steps such as punching, bending, and drawing, and shared by the respective press working apparatuses.

Then, a processing accuracy confirmation portion 11 according to the present invention is formed at a corner portion of the floor panel component 1 which is a diagonal position.

In this way, the processing accuracy confirmation unit 11 is the floor panel component 1
The two corners that are the diagonal positions of
This is because the positioning accuracy of the floor panel component 1 with respect to the molding die can be confirmed with high accuracy.

Next, the processing accuracy confirmation portion formed on the floor panel component 1 which is a processed product according to FIGS. 1 to 3 and 5.
11 will be described.

The processing accuracy confirmation unit 11 includes a display mark 12 that is simultaneously transferred and formed by the molding die during the first press processing, and an instruction mark 13 that is simultaneously transferred and formed by the molding die during the second press processing.
It consists of and.

Since the display mark 12 is formed by the forming die in the first press working step, it serves as a scale of an error amount caused by the second press working with the position of the first press working as a reference. It is a thing.

In this embodiment, since it suffices to know whether or not it is within a predetermined error range, the allowable error range for the second press working is clearly specified, and two long and short lines are provided in each of the Cartesian coordinates XY directions. V grooves 14 and 15 (see FIG. 3) are formed.

On the other hand, the instruction mark 13 has the edge portions of the instruction mark 13 because the panel mounting through holes 6 formed at the four corners of the floor panel component 1 in this embodiment are formed in the second press working step. It is also used for 13.

The position of the display mark 12 is formed on the floor panel component 1 so as to partially overlap the position where the through hole 6 serving as the instruction mark 13 is formed. (See FIG. 5).

That is, the V-groove with the long instruction mark 13 that is the edge of the through hole 6
When cutting 14 (see FIG. 2) and not cutting the short V-groove 15, the accuracy of the first press working and the second press working should be within a predetermined error range. V
The dimensions of the groove are defined.

Therefore, the state of the processing accuracy confirmation unit 11 shown in FIG. 1 shows a state in which the second press processing is performed within the allowable error range about the X axis, and the virtual lines A to B in FIG.
If it is within the range shown in, it means that it is within the allowable error range, and in other cases, it means that it deviates from the allowable error range.

If the processing accuracy confirmation section 11 is formed with a shape satisfying the above relationship in both X-axis and Y-axis directions, it is confirmed that the floor panel component 1 has been pressed within a predetermined accuracy. To do.

In this way, the processing accuracy confirmation unit 11 of the floor panel component 1
It is possible to immediately confirm whether or not the second press working with respect to the first press working is performed within a predetermined accuracy simply by visually recognizing.

Next, the processing accuracy confirmation unit 21 of the second embodiment shown in FIG. 6 will be described.

That is, the processing accuracy confirmation portion 21 of the second embodiment includes the display mark 22 constituted by the long and short V grooves 14 and 15, and the bent edge portion of the flange portion 24 bent downward on the edge portion of the workpiece W. It is composed of an instruction mark 23 consisting of 25.

The second press including the formation of the flange portion 24 is formed by bending the flange portion 24 including the tip portion 14 ′ of the longer V groove 14 and not including the shorter V groove 15. It can be confirmed that the processing is performed within the predetermined accuracy with respect to the first press processing.

Next, the processing accuracy confirmation unit 31 of the third embodiment shown in FIG. 7 will be described.

In this embodiment, the display mark 32 is a V-shaped groove 34, 3 formed one each in the X-axis direction and the Y-axis direction on the Cartesian coordinates.
5, and the length a of these V grooves is within the allowable error range.

On the other hand, the instruction mark 33 is composed of a V-shaped groove having an annular shape, and is formed exclusively.

Therefore, this embodiment is different from the above-described embodiment in that both marks 32 and 33 are formed as dedicated marks. Therefore, whichever is formed first in the first press working step is processed. It does not impair the accuracy check function.

In the processing accuracy confirmation device 31, when the indicator mark 33 formed in a ring shape intersects both the display marks 32 of a predetermined size formed in the X-axis and Y-axis directions, If the accuracy in the 1st and 2nd press working steps is maintained within a predetermined range, and one or both do not intersect, confirm that the predetermined processing accuracy is not maintained. You can

The first press working step and the second press working step in the above description are not necessarily continuous as the press working step, and the display mark is a scale-like measuring instrument. It goes without saying that it can be carried out.

(Effects of the Invention) As described above, according to the present invention, in a processed product processed by a plurality of pressing processes, a molding die for one of the first pressing process and the second pressing process is used. Is formed with a display mark serving as a scale of an error amount between these press working steps, and an instruction mark corresponding to the display mark is formed on the molding die of the other working step, and press working is performed with these molding dies. By doing so, these marks are transferred to the processed product, and the processing accuracy of the processed product is confirmed from the combined shape of these marks transferred to the processed product.

Therefore, whether or not the processed product or the semi-processed product is within the predetermined accuracy based on the combined shape of the display mark and the instruction mark formed on the molding die without performing measurement using a special measuring tool or the like. Can be immediately confirmed and confirmed.

[Brief description of drawings]

The drawings relate to an embodiment of the present invention, and FIG.
FIG. 2 is an enlarged view of the machining accuracy confirmation portion of the first embodiment shown in FIG. 2, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. An overall perspective view of a floor panel of an automobile, which is a processed product of the embodiment, FIG. 5 is an enlarged view of a display mark of the processing accuracy confirmation unit of FIG. 1, and FIG. 6 is a perspective view of the processing accuracy confirmation unit of the second embodiment. , FIG. 7 is a perspective view of a processing accuracy confirmation unit of the third embodiment. 1; Floor panel parts, 11, 21, 31; Machining accuracy confirmation part, 12, 22, 32; Display mark, 13, 23, 33; Instruction mark.

Claims (1)

[Claims] 1. In a processed product processed by a plurality of pressing steps, a forming die of either one of a first pressing step and a second pressing step is formed between these pressing steps. Indication marks that form the scale of the error amount are formed, and instruction marks corresponding to the above-mentioned display marks are formed on the molding die of the other processing step, and these marks are formed on the processed product by pressing with these molding dies. A method for confirming the processing accuracy of a pressed product, which comprises confirming the processing accuracy of the processed product from the combined shape of these marks transferred and transferred to the processed product.