WO1995002476A1

WO1995002476A1 - Die set manufacture method

Info

Publication number: WO1995002476A1
Application number: PCT/CN1994/000054
Authority: WO
Inventors: Yuanming Li
Original assignee: Yuanming Li
Priority date: 1993-07-13
Filing date: 1994-07-13
Publication date: 1995-01-26
Also published as: CN1107090A; AU7225294A

Abstract

A die set manufacture method comprises the steps as following: dividing the die set into forming members and rack, adopting proper thin plates from which the forming members were made, processing said plates respectively to shape each plate into the forming members with predetermined configuration, then pressing the forming members together precisely as a lamination and shaving the lamination, finally inserting the lamination into a finished rack, thereby a die set was formed integrally. The invention allows the manufacture of the die set simply and efficiently.

Description

TECHNICAL FIELD The present invention relates to molds, which are important process equipments for manufacturing and upgrading products in industries such as machinery, electronics, light weight, telecommunications, automotive, chemical, and military industries. BACKGROUND OF THE INVENTION The current mold industry has basically followed the manual workshop production model for many years, and has generally adopted the overall processing and multiple "cannibalization" methods. Although it also uses automated and modern methods such as numerical control and electrical processing, it has been affected by various Due to the limitation and complicated process, the overall process of mold manufacturing still has low efficiency, long cycle time, high cost, and it is known that the cost of the mold has accounted for 30% of products such as metal and plastic parts. /. .

At present, there are also some mold processing methods that use the block method. The basic idea is to divide large molds that are difficult to be processed integrally into small pieces and then assemble them into the entire mold. These methods solve the processing problems of large or complex molds to a certain extent, but they still treat the divided blocks as a whole in processing. The processing work is basically completed before assembly, so the processing cycle is still long. It is difficult to guarantee assembly accuracy. Moreover, such as French Patent No. 2,484,287, etc., the connection between the various parts is bolted, which has low connection strength and poor impact resistance. SUMMARY OF THE INVENTION The purpose of the present invention is to fundamentally change the status quo of mold manufacturing behind the upper and lower processes, simplify the process, enable most of the workload to achieve mechanization and automation, reduce mold costs, shorten the molding cycle, and promote product upgrades.

The object of the present invention is achieved as follows:

—A method for manufacturing molds. Layered (formed) parts are layered according to a coordinate direction. Each layer after layering is a two-dimensional plate of a certain shape. These two-dimensional plates can be continuously processed by the special plate of the mold. Made. The processed layers are precision pressed, clamped and polished, so that the formed (type) parts are manufactured. Thereafter, the formed (molded) parts and the integrally processed mold base are set into a body.

'' As mentioned above for mold special plates, the base metal is steel or other substitute materials commonly used in molds. It differs from ordinary steel plates in that the thickness tolerance is small, or the surface is coated with a bonding layer.

As described above, there are various methods for bonding the various layers of the plate after the processing. The method of bonding the layers of the plate can process the smoothness of the bonding surface between the layers to ▽ 10 The above is then combined by the suction of the metal itself. Alternatively, metal or alloy can be plated on the joint surface between the layers, and then heated and pressurized to firmly bond the layers. The bonding surface between the layers can also be coated with an inorganic binder or a polymer adhesive, and then cured by heating and pressure, so that the layers are firmly bonded. In the manufacturing method, each layer of the plate is designed according to the curvature of the formed (shaped) part.

, Can adopt equal thickness design or variable thickness design.

In order to ensure the pressing precision, this manufacturing method adopts a method of arranging a sufficient size and number of positioning pins at appropriate positions. When the mold is working, the positioning pins also share the shear force between layers.

In order to use this manufacturing method, it is best to use a specially designed special mold manufacturing machine, which includes a laser cutting machine that automatically and successively processes each layer profile or its profile, and a compression machine that can accurately press the conditions of the foot. Advantages of the present invention: 1: Shorten the molding cycle. Because the CAD / CAM technology is used to automatically and successively process each layer of the profile or profile one at a time, the mold profile processing becomes extremely simple, and the amount of cutting is greatly reduced (using laser cutting machine tools, even convex molds and The die only needs to be cut once and can be completed at the same time), it can be predicted that the mold making cycle will be shortened from two or three months to two or three days; 2.

The invention has a wide adaptability to various types of molds, and is particularly obvious for the processing of precise and complex large-scale molds. Because no matter how complicated and large-scale three-dimensional profiles are, only two-dimensional cutting needs to be prepared for layered cutting. Line data, and laser cutting makes the shape and size of the profile contour unlimited. The present invention is expected to be applied and popularized first on large-scale automobile cover stamping dies and high-precision plastic dies requiring ideal cooling water channels, and to gradually transform traditional mold processing. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be further described below with reference to the accompanying drawings, which are:

Fig. 1 is a schematic diagram of the present invention.

Fig. 2 is a diagram of a molded part of the present invention. Basic embodiments of the present invention The present invention is both a processing method and a manufacturing process, and its technical solution (example) mainly includes the following steps:

1. Imagine that a mold is properly divided into two parts: the central part is the formed part 1, and the outer part is the mold base 2. There is no need to divide the molds that have been produced by the mold base. There may be some cases where a non-standard mold base 2, the molding (type) part 1 and the mold base 2 are not limited to the existing mosaic scheme, and other implementation schemes can be designed according to the situation.

2. The method of the present invention is purely for the manufacture of shaped (type) part 1. When determining the size of the shaped part 1 from the mold drawing, three main aspects are taken into consideration: one is to be able to contain the molding surface; the other is to form the part. Layer processing and precision pressing, it is necessary to consider the location of the positioning pin 3 and determine the positioning pin

The size and number of 3 holes; the third is to adapt to the size of the spare raw materials. The function of the positioning pin 3 is not only to ensure the overall accuracy after pressing, but also to share the shear force between the layers. Therefore, the positioning pin 3 does not necessarily extend through the entire length of the molded (type) part 1 When the shaped (type) part 1 is long, it is necessary to use segmented compression. At this time, the positioning pins 3 can be arranged in sections on different axes. (Three positioning pins 3 in the drawing)

3. Select the forming part 1 for layered view, that is, in what direction to cut and layer. The punch in the figure is best only layered according to the direction shown in the figure, and the change of the profile of the adjacent two layers is small. The technical parameters required for the mold profile can also be calculated. Suppose that the selected raw material is a copper-plated steel plate with a thickness of lmni (the thickness of the coating is 2 to 8 microns is omitted). At this time, it is easy to draw a semi-circular shape for each layer. The diameter of the surface, which can also be calculated and calculated, the diameter of the nth layer = (ab) (c-n + l) / c + b. N = l, 2,3, ...... (c- 2). (Cl), c. Therefore, it can be processed conveniently and successively.

With layered views selected, it is important to avoid severe stress concentrations and improve mold life. This requires the full use of existing experience and know-how, and is also limited by material size classification (except for non-standard materials).

4. Reasonable selection of raw material specifications for molded parts. The base metal of the mold special plate with the surface coated with the bonding layer produced for the application of this method is still the steel commonly used in molds. The maximum thickness should be based on the productivity during laser cutting. It differs from ordinary steel plates in that it has high accuracy and small thickness tolerance. The technical specifications should include a set of bonding strength after compression and the corresponding parameters of the compression conditions. Eli mold factory chooses matching materials when manufacturing different types of molds.

Special mold plates are usually produced by scattered professional manufacturers. They generally purchase steel plates commonly used in molds to improve the thickness accuracy, or apply a bonding layer after surface pretreatment. The bonding layer can be a metal or alloy coating, or it can be an inorganic binder or a polymer adhesive.

5. According to the selected layered view and raw materials, use any kind of wire cutting machine or special mold surface processing machine to successively process the profile contour and press-fit positioning holes. The main difference between the specially designed mold surface processing machine and the existing wire cutting machine is that the sequential and continuous processing of each layer can be completed automatically, so the process is shortened and the efficiency is further improved.

0. In strict accordance with the pressing conditions required by the technical specifications, on the special pressing machine, the workpiece processed by the layer is precision-composited by positioning pins 3 (^ :). Pressed formed (formed) parts 1 The profile is usually jagged.

7. Finish grinding and polishing of the formed part 1. Grinding and polishing refers to grinding the jagged profile first, and then performing other surface treatments in the middle, and finally polishing.

8. Insert the formed part 1 and the finished mold base 2 into one according to the design plan.

f '£ D SH ££ T (RUL £ 91)

Claims

95/02476

1. A method for manufacturing a mold, layered (shaped) parts are layered according to a coordinate direction, and each layer after the layering is a two-dimensional plate of a certain shape. These two-dimensional plates can be made of special plates for the mold. Continuously processed separately. The processed layers are precisely pressed and then ground and polished, so that the molded parts are manufactured. After that, the (shaped) parts and the integrally processed mold base are set into one.

2. The mold processing method according to claim 1, characterized in that: the base plate of the special mold plate is steel commonly used in molds or other substitute materials. It differs from ordinary steel plates in that the thickness tolerance is small, or the surface is coated. Plated with a bonding layer.

3. The mold processing method according to claim 2, characterized in that: the bonding method between the layers of the sheet material can process the smoothness of the bonding surface between the layers to more than νιο, and then rely on the metal itself Suction combines into one.

4. The mold processing method according to claim 2, characterized in that: the bonding method between the layers of the sheet material can be plated with a metal or an alloy on the bonding surface between the layers, and then heating and pressing, Make the layers firmly bonded.

5. The mold processing method according to claim 2, characterized in that: the bonding method between the layers of the sheet material can be coated with an inorganic binder or a polymer adhesive on the bonding surface between the layers, and then Warm and pressurize to solidify the layers. ·

6. The mold processing method according to claim 1, characterized in that: when manufacturing each layer of the plate, according to the curvature of the formed (mold) parts, the thickness can be equal or variable.

7. The mold processing method according to claim 1, characterized in that: in order to ensure the pressing accuracy, a method of arranging a sufficient size and number of positioning pins at appropriate locations is used. When the mold is working, the positioning pins also share the layers. Shearing force.

8. The mold processing method according to claim 1, characterized in that: in order to use this manufacturing method, it is preferable to use a specially designed special mold manufacturing machine, including a laser cutting machine that automatically and successively processes each layer profile or its profile, And press machines that can meet precise press conditions.

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^{R £} CTIFIED SHEET (RULE 91) Date of receipt by the International Bureau: December 25, 1994 (25.12.94);

Original claims 1-8 replaced with new claims 1.3 (of 1 pages)

1. A method of manufacturing molds, using CAD / CAM technology to select appropriate layering of mold forming (type) parts, and at the same time designing appropriate positioning pins, using a CNC machine to sequentially process the profile or profile of each layer of plate in sequence , And positioning pin holes, etc., and then precisely pressed into the whole, after repairing, grinding and polishing, and the processed mold base inlaid into one.

2. A method for processing a mold according to claim 1, characterized in that: the strength of the various special plates used for the mold after precision pressing can meet different conditions and requirements for the use of the mold. The surface of this special sheet must be specially treated: either polished, or plated with a bonding layer, or coated with an inorganic or organic adhesive. The technical specifications of such plates should include a set of strength after compression and the corresponding parameters of the compression conditions'

3. A mold processing method according to claim 1, characterized in that: there are two types of special mold manufacturing machines specially designed for the use method: one is applicable to CAM technology, and the workpieces are automatically and continuously conveyed sequentially The device is a laser cutting machine and a wire cutting machine; the other is a vertical and horizontal laminating machine that can ensure precise positioning and pressing and meet different heating conditions.