JPH1147880A - Manufacture of parts of pressing die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the manufacturing efficiency of a casting pattern and a casting and the machining efficiency of die parts by manufacturing an integral casting combining many pieces of die parts (trim type insert) with bridges and removing the bridges after machining to make the individual parts. SOLUTION: A CAD system is used and many trim type inserts are alloted in foamed resin block and the bridges connected with the adjacent inserts are set. A cutting edge 23 of an NC machine is operated with a CAM system based on this allotment and the foamed resin block 30 is cut from the front surface and the back surface to make a pattern 32 with the bridges. Successively, this pattern is used and the casting combining and integrating many pieces of the trim type inserts 32a-32j with the bridges 35 is cast with a full mold process. Thereafter, the casting removing only runners is finished into a desired shape with the NC machine and the bridges 35 are cut off to make the individual trim type insert 32a-32j.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a press die part utilizing a full molding method.

[0002]

2. Description of the Related Art FIGS. 8 (a) to 8 (c) are views for explaining a process of trimming a conventional vehicle side panel outer.
(A) shows the press-formed side panel outer 100, and shows a state in which scraps 101 are left on the outer periphery and inner periphery of the side panel outer 100.

[0003] In FIG.
0 is disposed between the lower die 106 and the upper die 107 of the trim die device 105, and the side panel outer 100 is mounted on the trim die cutter insert 110 of the lower die 106. In this state, the upper mold 107 is lowered along the guides 114 and 114 as indicated by arrows, so that the trim 101 of the lower mold 106 and the upper mold 107 trim the scraps 101 of the outer side panel 100.

(C) shows the side panel outer 100 after the trimming process, and shows a state in which scrap has been removed from the outer and inner circumferences of the side panel outer 100.

FIG. 9 is a plan view showing a lower mold of a conventional trim-type device.
10 shows a state in which 10 is attached. The trim-type cutter insert 110 includes trim-type inserts 110a to 110j inside the side panel outer and trim-type inserts 101P outside the side panel outer. In the following figure,
A method for manufacturing the trim inserts 110a to 110j will be described.

FIGS. 10 (a) to 10 (c) are views for explaining a manufacturing process of a conventional trim type insert, and show a manufacturing method by a full molding method. In (a), a small block is cut off from a fixed-size foam resin block (not shown), and a model 116 of a trim-type insert 110a (see FIG. 9) is cut out from the small block.

[0007] In (b), the model 116 is replaced with a sand mold 117.
It is buried inside and poured into the model 116, and the model 116 is burned and vaporized with a molten metal to cast the same casting as the model. 1
Reference numeral 18 denotes a sand formwork. In (c), the casting removed from the sand mold is machined to obtain the trim insert 110a. 119 is a stepped hole for attaching the trim type insert 110a to the lower die. Hereinafter, the above steps are repeated to manufacture trim type inserts 110b to 110j.

[0008]

However, in this manufacturing method, since a large number of models of trim-type inserts are individually cut, the productivity is low, and a foamed resin block is cut into a cutting machine for each model to be cut. The setting takes time and effort. As a result, it is difficult to efficiently trim a model of the trim insert.

In addition, since a large number of models are individually embedded in the sand mold, it takes time to embed in the sand mold and take it out of the sand mold.

Further, since a large number of castings are individually machined, setting when machining the castings is troublesome. As a result, it is difficult to efficiently machine a large number of castings.

Accordingly, an object of the present invention is to efficiently cut a model of a press mold component, to reduce the size of a casting machine for the press mold component, and to efficiently use the press mold component. It is to provide a technique capable of machining.

[0012]

In order to solve the above problems, a first aspect of the present invention is to cut a model from a foamed resin block, pour the model into a mold embedded in a sand mold, and press the mold. In the method of manufacturing the mold parts, while allocating the models to the foamed resin blocks, shaving the models with bridges in the form of connecting the models next to each other with bridges, embedding in sand molds, pouring, the obtained The present invention is characterized in that the casting is machined with the bridge attached, and then the bridge is removed to obtain a pressed mold part.

[0013] By cutting out a model with a bridge in which a number of models are connected by a bridge, a number of models can be cut out at the same time. For this reason, since it is not necessary to cut out many models individually, productivity can be improved when cutting out models from the foamed resin block. In addition, it is possible to save the trouble of setting on the cutting machine when cutting. As a result, a model of the trim type insert can be efficiently cut out.

[0014] A model with a bridge is embedded in a sand mold,
By pouring a large number of models simultaneously, a large number of castings can be obtained. For this reason, it is possible to save the labor of embedding a large number of models individually in the sand mold and removing the time from the sand mold.
Castings can be manufactured efficiently.

By subjecting the obtained casting to machining with the bridge attached, a large number of press mold parts can be set and machined at the same time. For this reason, it is possible to save the trouble of individually setting the press mold parts in the processing machine, and it is possible to efficiently machine the press mold parts.

A second aspect of the present invention is characterized in that the model is molded with the shape surface side facing downward.

Since the lower portion of the molten metal filled in the model becomes dense, the structure of the molten metal on the shape surface side can be made dense by embedding the molten metal in the sand surface with the shape surface side, that is, the portion where accuracy is required facing downward. As a result, the number of cavities generated on the shape surface side can be reduced, so that the shape surface side can be accurately formed.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a block diagram showing an apparatus for manufacturing a press die component according to the present invention. The press die component manufacturing apparatus 1 is for manufacturing a trim die insert as a press die component for trimming a scrap of a side panel outer of a vehicle, and allocates a large number of trim die inserts to a foam resin block. CAD (Computer Aided
Design) system 2 and C for creating machining data for operating the NC machining machine based on the allocated data.
An AM (Computer Aided Manufacturing) system 20.

The CAD system 2 includes a first data recording unit 4 for recording existing shape data of the side panel outer,
Second to record existing shape data of trim insert
A data recording unit 6, an input unit 8 for inputting new shape data of the outer side panel, and first and second data recording units 4 for existing shape data closest to the new shape data;
6, a shape data creating unit 12 for creating new shape data of the trim type insert based on the existing shape data read by the control unit 10 and the new shape data input thereto; Creation unit 1
2 includes a creation data recording unit 14 for recording the new shape data created in 2 and a display unit 16 for displaying desired shape data on a screen.

The CAD system 2 reads out the shape data of the trim type insert from the created data recording unit 14 and displays it on the screen of the display unit 16, and allocates a large number of trim type inserts to the foam resin block on this screen. , A bridge for connection is set to a large number of allocated trim-type inserts, and the data with the bridge is created in the data recording unit 1
Record in 4.

The CAM system 20 is a CAD system 2
NC (Numerica)
l Control) Creates NC data for controlling the processing machine 22.

Next, a method of manufacturing the trim-type inserts 110a to 110j of FIG. 9 by the method of manufacturing a press die component according to the present invention will be described. In addition, in order to facilitate understanding of the description, FIGS.
The method will be described with reference to the drawings for explaining the method of manufacturing. FIG. 2 is a flowchart illustrating a method for manufacturing a press die part according to the present invention, in which STxx indicates step numbers.

ST01: A number of trim-type inserts are allocated to the foamed resin block, and adjacent trim-type inserts are connected by a bridge. 3 (a) to 3 (c) are first explanatory views of the method for manufacturing a press die part according to the present invention. 1A, the trim type insert 110 is displayed on the screen of the display unit 16 using the CAD system 2 shown in FIG.
Determine the shape of a. Similarly, the shapes of the other trim type inserts 110b to 110j (see FIG. 9) are determined.

In (b), the trim type inserts 110 a to 110 j are allocated to the foamed resin block 30 on the screen of the display unit 16. The foamed resin block 30 has a fixed length of, for example, 1800 mm in length, 900 mm in width, and 400 mm in thickness.

In (c), a bridge 34 for integrally connecting the trim type inserts 110b to 110j to the outer frame 30a of the foamed resin block 30 on the screen of the display unit 16.
Indicates a plurality. The same applies hereinafter. ). This bridged data is recorded in the creation data recording unit 14 of the CAD system 2 shown in FIG.

ST02: Trim type insert 110b ~
The bridge model 32 to which 110j is assigned is cut out from the foamed resin block. 4 (a) to 4 (c) are second explanatory views of the method for manufacturing a press die component according to the present invention.
(C) is a sectional view taken along line 4c-4c of (b). (A)
At the time, based on the bridged data recorded in the created data recording unit 14 of the CAD system 2 shown in FIG.
The NC data is created by the AM system 20. Then, the NC processing machine 22 (see FIG. 1) is operated with the NC data to cut out one surface of the foamed resin block 30 with the cutting blade 23, and then turns over to start cutting the opposite surface.

FIG. 2B shows a state in which a model 32 with a bridge is cut out from the foamed resin block 30. Model 3
2a to 32j are trim-type inserts 110a, respectively.
110j (see FIG. 9). 35 are model bridges that integrally connect the models 32a to 32j. (C) Model 3 formed on model 32 with bridge
2A, 32B, and 32D show cross sections. Reference numerals 33... Correspond to a cutter portion for trimming the scrap (on the side of the shape of the pressed mold component).

According to ST02, a large number of models 32a-
By shaving the model 32 with a bridge, which is obtained by connecting the bridges 32j with the model bridges 35,...
32j can be simultaneously cut out. For this reason, since it is not necessary to cut out many models 32a-32j individually,
Productivity can be improved when cutting the models 32a to 32j from the foamed resin block 30. In addition, it is possible to save the trouble of setting the models 32a to 32j on the cutting machine when cutting. As a result, the trim insert models 32a to 32j can be efficiently cut out.

ST03: The bridge model 32 is embedded in a sand mold and poured to obtain a casting. 5 (a) to 5 (c) are third explanatory views of the method for manufacturing a press die part according to the present invention. In (a), the bridge model 32 is replaced with a sand mold 3.
8 and the molten metal 39 is poured. At this time, the model bridges 35 become runners. Numeral 40 is a sand mold. Here, since the cutters 33 (that is, the shape surface side of the press mold parts) 33 of the models 32a, 32b, and 32d face down and are embedded in the sand mold 38, the bubbles in the filled molten metal 39 are removed by the cutters 33. You can escape in the direction away from. As a result, no bubbles are present in the vicinity of the cutter parts 33, so that the cutter parts 33 can be formed with high accuracy.

In (b), the casting 42 with the bridge and the runners 44... Are removed from the sand mold. When the molten metal is filled in the model bridges 35, the castings 42a,
The bridge 34 connects the members 42b and 42d together.
In (c), the runner is cut from the bridged casting 42. The bridges 34 are left uncut.

According to ST03, bridge model 32
Is embedded in a sand mold 38, and a large number of models 32a to 32j
At the same time, castings 42a, 42b, 42
Many d can be taken. For this reason, many models 32a
３２32j can be saved individually in the sand mold and removed from the sand mold, and the castings 42a, 42b, 42d can be saved.
Can be manufactured efficiently. In addition, each casting 4
Since it is not necessary to separately provide a large number of casting facilities in accordance with 2a, 42b, and 42d, the casting facility can be downsized.

ST04: Casting 4 of Bridge Casting 42
Machine 2a, 42b, 42d into trim inserts. 6 (a) to 6 (c) are fourth explanatory views of the method for manufacturing a press die part according to the present invention. In (a), the processing data created by the CAM system 20 shown in FIG.
By operating the C machine 22, the upper end 43 a and the lower end 43 b of the outer frame 43 of the casting 42 with a bridge are machined to the reference plane by the cutting blade 46. In the processing procedure, first, the upper end 43a of the outer frame 43 is processed, and then the casting 42 with a bridge is inverted as shown in (a) to process the lower end 43b of the outer frame 43.

In (b), the castings 42a, 42b and 42d integrally connected to the casting 42 with a bridge are turned into a desired shape with a cutting blade 49 in a state where the casting 42 with a bridge is turned upside down and mounted on a surface plate 48. Machine.

In (c), the casting 42 is returned from the inverted state and attached to the platen 48, and the front sides of the castings 42a, 42b and 42d integrally connected to the casting 42 are cut with a cutting blade 49.
Is machined to the desired shape. Next, castings 42a, 42
b, Stepped holes 119 to be attached to 42d are opened.
As a result, the castings 42a, 42b, 42d are respectively trimmed inserts 110a, 110b, 110d shown in FIG.
It has been processed into.

According to ST04, the casting with bridge 42
Are machined to obtain a large number of castings 42a, 42a.
b and 42d can be machined simultaneously. For this reason, the trouble of setting the castings 42a, 42b, 42d individually on the processing machine can be omitted, and the machining can be performed efficiently.

ST05: The bridge integral with the multiple trim inserts is removed. 7 (a) to 7 (c) are fifth explanatory views of the method for manufacturing a press die part according to the present invention. (A) shows a state in which the trim inserts 110a to 110j are integrally connected by a bridge by machining the casting 42 with a bridge.

In (b), the trim type insert 11
Blocks 5 are formed on the platen 48 of the NC processing machine 22 shown in FIG.
Attach via 1 ... In (c), the NC processing machine 22 is operated with the processing data created by the CAM system,
The bridges 34 are cut, and a number of trim-type inserts 110a to 110j are removed from the bridges 34.

In the above embodiment, the method of manufacturing a trim insert which is a press die component was described. However, the present invention is also applicable to the manufacture of a cam slider or a cam unit for elevating an upper die as another press die component. Further, the present invention can be applied to the manufacture of parts other than press mold parts (particularly suitable for small parts).

[0039]

According to the present invention, the following effects are exhibited by the above configuration. According to the first aspect, a plurality of models can be simultaneously cut by cutting a model with a bridge in which the plurality of models are connected by a bridge. For this reason, since it is not necessary to cut out many models individually, productivity can be improved when cutting out models from the foamed resin block. In addition, it is possible to save the trouble of setting on the cutting machine when cutting. As a result, a model of the trim type insert can be efficiently cut out.

A model with a bridge is embedded in a sand mold,
By pouring a large number of models simultaneously, a large number of castings can be obtained. For this reason, it is possible to save the labor of embedding a large number of models individually in the sand mold and removing the time from the sand mold.
Castings can be manufactured efficiently.

By subjecting the obtained casting to machining with the bridge attached, a large number of press mold parts can be set and machined simultaneously. For this reason, it is possible to save the trouble of individually setting the press mold parts in the processing machine, and it is possible to efficiently machine the press mold parts. For the above reasons, it is possible to reduce the cost of the press die component and increase the production efficiency.

According to a second aspect of the present invention, since the lower portion of the molten metal filled in the model becomes dense, the structure of the molten metal on the shape surface side, that is, the portion where precision is required is downwardly buried in the sand mold. Can be elaborated. As a result, the number of cavities generated on the shape surface side can be reduced, so that the shape surface side can be accurately formed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an apparatus for manufacturing a press die part according to the present invention.

FIG. 2 is a flowchart illustrating a method for manufacturing a press die part according to the present invention.

FIG. 3 is a first diagram illustrating a method of manufacturing a press die part according to the present invention;
Illustration

FIG. 4 is a second view of the method for manufacturing a press mold part according to the present invention.
Illustration

FIG. 5 is a third view of the method for manufacturing a press die part according to the present invention.
Illustration

FIG. 6 is a fourth view of the method for manufacturing a press die part according to the present invention.
Illustration

FIG. 7 is a fifth view of the method for manufacturing a press die part according to the present invention;
Illustration

FIG. 8 is a process explanatory view of trimming a conventional vehicle side panel outer.

FIG. 9 is a plan view showing a lower mold of a conventional trim-type device.

FIG. 10 is an explanatory view showing a manufacturing process of a conventional trim type insert.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Press die component manufacturing apparatus, 30 ... Foam resin block, 32 ... Bridge model, 32a-32j ... Model
33: Shape side (cutter portion), 38: Sand mold, 34: Bridge, 35: Bridge for model, 42: Cast with bridge, 42a, 42b, 42d: Cast, 110a to 110
j ... Press mold parts (trim type inserts).

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Keiichi Takemoto 1-10-1, Shinsayama, Sayama-shi, Saitama Honda Engineering Co., Ltd.

Claims (2)

[Claims] 1. A method of manufacturing a press die part by shaving a model from a foamed resin block, pouring the model into a mold embedded in a sand mold, and allocating the model to the foamed resin block. , A model with a bridge is cut out in the form of connecting the models next to each other with a bridge, embedded in a sand mold, poured, machined with the obtained casting with the bridge attached, and then the bridge is removed A method for manufacturing a press mold part, characterized in that a press mold part is obtained by the above method. 2. The method according to claim 1, wherein the model is molded with the shape side facing downward.