JPS59212133A - Manufacture of press die having reference mating hole - Google Patents

Abstract

PURPOSE:To make centering easy and exact and to obtain a pressed product having high quality by forming reference mating holes at the prescribed points of a die model and forming reference mating holes to a press die conforming to said reference mating holes in accordance with the die model. CONSTITUTION:A master model 1 is manufactured and at the same time reference mating holes 2 are formed at least at two points on the surface to determine the shape of a pressed product. A skin model 3 is manufactured in accordance with the model 1 and reference mating holes 4 conforming to the holes 2 are simultaneously formed. Keller models 5, 6 are then manufactured. The model 5 is manufactured in accordance with the model 1 and is formed with reference mating holes 7 conforming to the holes 2. Reference mating holes 8 are similarly formed with the model 6 in accordance with the model 3. A press die is manufactured in accordance with the Keller models 5, 6. A tracer 11 and a cutter 12 are adjusted in accordance with the centered Keller model 6 and reference mating holes 10 are worked on a lower die 9 so as to correspond to the holes 8 of the model 6.

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing a press mold.

Conventionally, press molds are generally manufactured by preparing a mold model of the desired shape in advance and performing copying processing based on the mold model, but in this case, the profile processing of the press mold is A machining reference plane is provided on the profile of the mold, and processing is performed by centering based on the machining reference plane.In contrast, curved surface machining of a press mold is performed based on pre-marked lines on the mold model. This is done by centering and then processing. Therefore, in conventional methods, the centering standards for profile machining and curved surface machining are different, resulting in misalignment between the profiled surface and the curved surface of the press mold, or when machining the curved surface of the press mold. Processing errors may occur due to the thickness of the marking lines on the mold model, marking errors, and even errors when aligning the centering pin with the marking lines, and in any case, the accuracy of the press die may be affected. There was a problem that the value decreased.

Conventionally, butting against the mold model during finishing machining of a press mold was done by aligning the tip of the tool (centering tool) attached to the center of the press mold with a marking line on the mold model. Although the process is performed with centering performed, correct alignment cannot be performed for the same reasons as mentioned above, such as the thickness of the scribed lines and scribing errors, resulting in finishing errors in the press die, reducing accuracy. There was a problem with the time taken.

Furthermore, in the past, the press mold and the press mold were compared by overlapping the press mold and the press mold to determine whether there was a gap between the press mold and the press mold. The suitability of positioning with the
This method has a problem in that it is difficult to determine positioning because it relies on gaps that are difficult to visually recognize directly.

Furthermore, in order to measure the accuracy of pressed products, it was common practice to apply the guide surface of a checking fixture to the pressed surface and measure the accuracy of the pressed product using this as a reference, but this method In this case, the reference surface has variations due to spring back, machining errors, etc., and a gap may occur between the guide surface of the checking fixture and the machined surface of the pressed product. There was a problem in that the error in product accuracy measurement increased.

This invention was made in view of the above circumstances, and includes a reference alignment hole in the mold model that is useful for centering the press mold and mold model during mold processing, positioning of the pressed product, and measuring the accuracy of the pressed product. The object of the present invention is to provide a method for manufacturing a press mold that can be formed into a press mold to obtain a high-quality pressed product.

In this invention, a reference alignment hole is formed in advance in a mold model that is a mother mold of a press mold, and the press mold is patterned based on the mold model, and the M of the mold model is formed during the patterning process. This method is characterized by forming a reference alignment hole at a location corresponding to the die alignment hole, and according to this method, the centering of the press die and die model, the positioning of the press product, and the accuracy of the press product can be achieved. Measurement can be made easy and appropriate.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 4 are schematic diagrams showing a master model, a skin model, and a Keller model used in carrying out the method of the present invention. First, a master model 1 is manufactured in the shape shown in FIG. At the same time, at least two reference alignment holes 2 are formed on the surface of the master model 1 that determines the shape of the pressed product (the top surface in FIG. 1). Then, based on this master model 1, a skin model 3 shown in FIG. 2 is manufactured, and reference alignment holes 4 corresponding to reference alignment holes 2 of the master model 1 are simultaneously formed in the skin model 3. As a method for this, for example, a method may be adopted in which a bottle (not shown) is placed in the reference alignment hole 2 of the master model 1, the master model 1 is coated with a suitable resin, and the resin is cured. Next, the Keller model 5 shown in FIG.
Then, a Keller model 6 shown in FIG. 4 is manufactured. The Keller model 5 shown in FIG. 3 is manufactured based on the master model 1, in which case a reference alignment hole 7 corresponding to the reference alignment hole 2 in the master model 1 is formed in the Keller model 5. Further, the Keller model 6 shown in FIG. 4 is manufactured based on the skin model 3, and a reference alignment hole 8 corresponding to the reference alignment hole 4 in the skin model 3 is formed in the Keller model 6. For the reference alignment holes 7.8 in these Keller models 5.6, the drilling positions are determined by setting appropriate bins (not shown) in the reference alignment holes 2.4 in the master model 1 or skin model 3, or skin model 3
It can be formed by a method such as inserting a drill (not shown) into the reference alignment hole 2.4 and directly drilling the hole.

A press mold is manufactured based on the Keller models 5 and 6 obtained as described above. FIG. 5 shows a method of manufacturing the lower die 9 of the press mold based on the Keller model 6 shown in FIG. 4. Prior to processing the lower mold 9, setup including centering of the Keller model 6 is performed based on the reference alignment hole 8 and the position data of the reference alignment hole 8. To do this, set the position of the Keller model 6 so that the dimension from the predetermined reference to the reference alignment hole 8 becomes the desired value, or set the Keller model 6 to the skin model 3 or the Keller model 5 shown in Fig. 3. Utilize the reference alignment holes in these models 3.5 and 4.
7 and the reference alignment hole 8 in the Keller model 6 using a bottle or the like, the position of the Keller model 6 can be adjusted.
! You can use a method such as setting the Based on the Keller model 6 centered in this manner, the tracer 11 and cutter 12 are adjusted to form a reference alignment hole 10 in the lower die 9 so as to correspond to the reference alignment hole 8 of the Keller model 6.

Curved surface processing and profile processing of the lower mold 9 are performed using the reference alignment hole 10 of the lower mold 9 and the reference alignment hole 8 of the Keller model 6 as references. In addition, the lower mold 9 and skin model 3 during finishing processing
The alignment is performed by placing a bottle (not shown) in the reference alignment hole 4.10.

FIG. 6 shows a method of positioning the lower die 9 manufactured as described above. That is, in the method shown here, by setting the bottle 13 in the reference alignment hole 10 of the lower mold 9 and inserting the bottle 13 into the reference alignment hole 4 formed in the skin model 3, the lower mold 9 and the skin model 3 are aligned. Positioning is performed by integrating the Further, FIG. 7 shows a method of positioning the pressed product 14,
A reference alignment hole 15 corresponding to the reference alignment hole 10 of the lower die 9 is formed in the pressed product 14, and a bottle 1 is inserted into the reference alignment hole 10 of the lower die 9.
3 and inserting the bottle 13 into the reference alignment hole 15 formed in the press product 14 to position the press product 14.

FIG. 8 shows a method for measuring the accuracy of the pressed product 14, using the reference alignment hole 15 of the pressed product 14,
The press product 14 is positioned by the bin 16 and the checking fixture ≠ the char 17, and the accuracy of the press product 14 is measured using the reference alignment hole 15 as a reference, for example, the accuracy measurement by the dimensions of each part from the bin 16 or the dimensions of the press product 14. Check for variations, etc.

In addition, in the above-mentioned embodiment, the case where the pressing direction is perpendicular to the lower die 9 was taken as an example and explained, but the method of the present invention can also be applied to the case where the pressing direction is not perpendicular to the lower die. In that case, for example, as shown in FIG. 9, the reference alignment hole 19 in the master model 18 is formed so as to be inclined toward the press direction.
Based on that master model 18, skin models and Kera-
A model and a press mold may be manufactured in the same manner as in the above embodiment.

10 to 15 show another embodiment of the present invention, and the method shown here is for manufacturing a press mold having a reference alignment hole in the direction FA. That is,
First, the first reference alignment hole 21 is formed in the master model 2o as shown in FIG. A second reference alignment hole 22 is formed. The master model 20 obtained in this way is tilted as shown in FIG.
．． The skin model 23 is manufactured by coating the bottle 22 with an appropriate resin in an upright position and curing the resin.

Next, as shown in FIG. 13, the master model 20
When copying the press die 24 using the , by aligning the tracer 25 with the first reference alignment hole 21 in the master model 2o, the press die 24 is
A reference alignment hole 26 is bored at a location corresponding to the reference alignment hole 21 using a reamer 27, and the press die 24 is also curved and profiled. After binding, as shown in FIG. 14, a bottle 28 is placed in the reference alignment hole 26 in the press mold 24, and the corresponding reference alignment hole in the skin model 23 is fitted into the bottle 28, thereby forming the skin. As shown in FIG. 15, the model 23 is butted against the press die 24, and in this state, another reference alignment hole 3o is formed in the press die 24 using the drill 29 through the other 14 alignment holes inserted into the skin model 23. do.

In the press die 24 obtained in this manner, as in the above-described embodiment, the positioning of the press die 24 and the model, the positioning of the press product, and the accuracy of the press product are performed using the reference alignment holes 26 and 30 as a reference. Take measurements.

As is clear from the above description, according to the present invention, at least two reference matching holes are formed in advance at predetermined locations on a mold model, and based on the mold model, the reference matching holes in the mold model are Since this is a method of forming reference alignment holes at corresponding locations on the press die, the die model and press die are centered and the press die is machined based on the reference alignment holes, and then the reference alignment is performed. The holes can be used to position the press mold and press product, match the mold model and press mold, or measure the accuracy of the press product.As a result, the standards for measurement etc. are always the same. It makes it easier and more accurate to center the die model and the press die, and at the same time improves the accuracy of the die and the measurement accuracy of the press product, which in turn reduces the number of press steps and at the same time allows you to obtain high-quality press products. There is an effect.

[Brief explanation of drawings]

Figure 1 is a schematic cross-sectional view showing an example of the master model, Figure 2
The figure is a schematic sectional view showing an example of a skin model, FIGS. 3 and 4 are schematic sectional views showing an example of a Keller model, and FIG. 5 is an explanatory diagram of the processing method of the lower die (press die).
Fig. 6 is an explanatory diagram showing the method of positioning the press die, Fig. 7
The figure is an explanatory diagram showing a method for positioning a pressed product, and FIG. 8 is an explanatory diagram showing a method for measuring accuracy of a pressed product. FIG. 9 is a schematic cross-sectional view showing an example of a master model in another embodiment. FIG. 10 is a schematic cross-sectional view showing an example of a master model in another embodiment, FIG. 11 is an explanatory view showing a method for drilling an inclined reference alignment hole, and FIG. 12 is an explanatory view showing a method for manufacturing a skin model. , Fig. 13 is an explanatory diagram showing a method of processing a press mold, Fig. 14 is an explanatory diagram showing a method of butting a skin model and a press mold, and Fig. 15 is an explanatory diagram showing a method of butting a skin model and a press mold. It is an explanatory diagram showing a method. 1.18.20...Master model, 3.23...
・Skin model, 2.4.7.8.10.15.19
．． 21.22.26.30... Reference alignment hole, 9...
Lower mold, 24...Press mold, 13.16.28...
・Pin, 17... Checking Fixture. Applicant Toyota Motor Corporation Agent Patent Attorney Yutaka 1) Hisashi Take (one idiot) Figure 3 Figure 4 Figure 5 Figure 7tiIA Figure 6 Figure 8 Figure 9

Claims (1)

[Claims] At least two reference alignment holes are formed in advance at predetermined locations on a mold model that serves as a mother mold for a press mold, and the press mold is patterned based on the mold model, and the mold is A method for manufacturing a press die, characterized by forming a reference alignment hole at a location corresponding to a reference alignment hole in a model.