JPS6264430A - Working method for metallic plate - Google Patents

Abstract

PURPOSE:To reduce the manufacturing cost of a product by executing a pressure forming by combining a die made of a high strength cement and a die in which at least a surface layer part has been constituted of a metallic material. CONSTITUTION:A die 1 made of high strength cement is manufactured by placing a reinforcing bar 2, etc. in a die frame 3, and by means of casting by using a cement substance a superfine powder, a water reducing agent, an aggregate, water, etc. A metallic die 5 is manufactured at least by constituting its surface layer part of a metallic material. The metallic die 5 can also be constituted of a cast iron, various alloys and a non-ferrous metal, etc. Next. the metallic die 5 is used by combining with the die 1 made of a high strength cement and a wrinkle holder 4, and forming of a metallic plate is executed by a press, etc. In this way, the manufacturing period of the dies 1, 5 and the cost are shortened and reduced remarkably, respectively. Accordingly, the manufacturing cost of a product is reduced remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for processing metal plates. More specifically, the present invention relates to a method of processing a metal plate by combining a mold made of high-strength cement and a mold whose surface layer is made of a metal material to pressure-form a metal plate to obtain a product.

[Conventional technology]

Products obtained by press-forming metal plates are widely used in various fields. Normally, this molding requires molds such as a female mold, a male mold, and a wrinkle presser.
These molds have been made of cast iron or steel.

However, since cast iron and copper molds require surface treatment and machining, the mold manufacturing process is complicated, increasing labor costs and increasing the economic burden. Therefore, there has been a strong desire for a metal plate processing method that is economically superior by reducing mold manufacturing costs and that does not change the properties of the product.

We have discovered a metal plate processing method that is extremely economical and can produce a product with a surface quality that is equal to or better than that obtained by using molds made of ordinary metal materials, and has developed the present invention. I have reached the point where I have completed the .

[Means for solving problems]

That is, the present invention is a method for processing a metal plate, which is characterized in that a mold made of high-strength cement a and a mold whose surface layer is made of a metal material are combined and pressure-formed.

The present invention will be explained in detail below.

The mold made of high-strength cement in the present invention is one that uses cement as a base for basic fishing, and can be obtained by combining anhydrite-based admixtures, autoclave curing, or ultrafine powder and a high-performance water reducing agent. Something, 1
．． 000 Kgf/cm" or more. Molds made of high-strength cement can be manufactured by pouring into a master mold and then inverting the mold, which significantly shortens the mold making period. For example, what would take about 12 to 22 weeks to make made of steel can now be made in about one week.

In particular, among these, cementitious substances, ultrafine powders,
Ru.

The cementitious materials referred to here include normal, early strength, super early strength,
Various portland cements such as white or sulfate resistant,
Neelite, a mixture thereof, a mixed cement containing blast furnace slag, fly ash, etc., and a combination of blast furnace slag powder and an alkaline stimulant.

Cementitious materials may also be treated with expansion cement to compensate for shrinkage or 1. It is also possible to use a high-strength gypsum-based admixture that has been developed to achieve the required strength in a short period of time using rapidly hardening cement.

The expanding component of the expanding cement is an ettringite-based one, such as Denki Kagaku Kogyo Co., Ltd. part name [C8A+2].
0 J or calcined CaO is preferable, and calcined CaO is preferably calcined at a temperature of 1,100 to 1,300'c and has an average crystal diameter of 10 μm or less.

The quick-hardening component of quick-hardening cement is preferably one based on calcium aluminate, such as alumina cement, a combination of alumina cement and gypsum, and parts manufactured by Denki Kagaku Kogyo Co., Ltd. [Denka ESJ and Onoda Cement Co., Ltd.]. ) products such as ``jet cement'' are used.

The high-strength admixture is a gypsum-based material, and effective examples include Denki Kagaku Kogyo Co., Ltd. part name [Denka Σ-1000J] and Nippon Cement Co., Ltd. part name ``Asano Super Mix.''

The ultrafine powder used in the present invention has an average particle size that is at least one order of magnitude smaller than that of cementitious materials (average particle size of about 10 to 30μ), and those with an average particle size that is two orders of magnitude smaller have better flow characteristics of the mixed material. It is preferable from the aspect. in particular,
Silica dust (silica fume) and siliceous dust, which are by-products when producing silicon-containing silicon alloys and zirconia, are particularly suitable, such as calcium carbonate, silica gel, ohal silica, fly ash, blast furnace slag, titanium oxide, and aluminum oxide. can also be used. especially,
The use of ultrafine powder obtained by pulverizing opalescent silica, fly ash, and blast furnace nlug using a pulverizer combined with a classifier is effective in improving hardening shrinkage.

The amount of ultrafine powder to be used is preferably 40 to 5 parts by weight based on 60 to 95 parts by weight of the cementitious material, and more preferably 65 to 10 parts by weight based on 65 to 90 parts by weight of the cementitious material. If it is less than 5 parts by weight, the effect of developing high strength will be small, and if it exceeds 40 parts by weight, the fluidity of the mixed wire will be markedly reduced, making it difficult to mold9, and the strength will not be developed sufficiently.

High performance water reducing agent in the present invention (hereinafter simply referred to as water reducing agent)
is a surfactant with a high dispersion ability that does not cause too much delay in setting or excessive air entrainment even when added to cement in large quantities. Examples include those whose main components are salts, high-molecular weight trigeninsulfonates, polycarboxylate salts, and the like.

Conventionally, the amount of water reducing agent used is 0.6 to 1 part by weight as a solid content per 100 parts by weight of cementitious material, but in the present invention, it is preferable to add a larger amount than that. , 1 to 5 parts by weight are more preferred. The water reducing agent is
It is necessary to obtain a kneaded product with a low water/(cement + ultrafine powder) ratio (hereinafter referred to as water/powder ratio), and if it exceeds 10 parts by weight, it will adversely affect the curing reaction. By combining ultrafine powder with such an amount of water reducing agent used, it is possible to obtain a fluid mixed material that can be molded by a conventional method even if the water pulverization ratio is 25 or less.

The water used in the present invention is necessary for molding, and in order to obtain a mold made of high-strength cement, the amount of water used is as good as possible. -30 parts by weight is preferred, and 13-25 parts by weight is more preferred. When the amount of water is more than 30 parts by weight, it is difficult to obtain a mold made of high-strength cement and it becomes dusty, and when it is less than 10 parts by weight, ordinary molding such as pouring becomes difficult. In addition, in compression molding etc., it is not limited to this, but 1
Molding is possible even when the amount is less than 0 parts by weight.

Usually, a combination of aggregates is also used. If an aggregate of 7 or higher is used, the strength can be significantly improved.

Further, it is also possible to use metal materials with excellent ductility, such as iron powder or iron balls, as the aggregate.

In normal pour molding, the amount of aggregate used is selected within 5 times the weight of the total of cementitious material and ultrafine powder. However, this does not apply to pre-packed and post-packed construction methods.

In addition to the above-mentioned materials, it is also possible to use a combination of various metals, organic and inorganic fibers, nets, etc., and the use of reinforcing bars and steel bars is especially important for large items. be.

In addition, it is also possible to add so-called solid lubricants, such as molybdenum disulfide and hexagonal boron nitride, to provide other functions, such as sliding properties, and even oil-absorbing carbon, etc. It is also possible to use

In addition, it is also possible to incorporate substances that impart special properties such as thermal conductivity and electrical conductivity.

Any method may be used for mixing and kneading the above-mentioned materials as long as they can be mixed and kneaded uniformly, and the order of addition is not particularly limited.

Various curing methods are possible for curing the molded product, including room temperature curing,
Any of the methods of normal pressure steam curing, high temperature and high pressure curing, and high temperature curing can be employed, and if necessary, a combination of these methods can be used to obtain a mold made of high strength cement.

Furthermore, it is also possible to form a metal layer, a resin layer, a ceramic layer, etc. on the surface layer of this high-strength cement mold, for example, by plating, thermal spraying, painting, etc.

A high-strength cement mold such as one or more of the above is further combined with a mold whose surface layer is made of metal (hereinafter referred to as a metal mold). The metal material of this type is cast iron, valley f! 1i alloys and non-ferrous metals. All or at least the surface layer of this stencil can be made from metal by methods such as casting or pattern processing.Also,
As a method of using gold 51 material only in the surface layer portion, thermal spraying, electroforming, etc. are possible at 1〒F. As this type of backing material, high-strength cement or resin concrete containing epoxy resin as a main component can be used.

By using the above-mentioned high-strength cement mold and metal mold together, the high-strength cement mold can be used as a female mold to press metal plates such as iron plates, steel plates, and various alloy steel plates such as stainless steel. It is preferable to use a mold from the viewpoint of the surface quality of the product. It goes without saying that the most economical method is to use molds made of high-strength cement for both, but if the hardness of both is made too high, especially in the case of deep drawing, ironing scratches may occur. Undesirable. By using a metal mold as the female mold, the surface quality of the product is better than when metal molds are used for both, and this is a very economical method of processing metal plates.

〔Example〕

This will be explained below using examples.

EXAMPLE Motorcycle parts were molded using a mold as shown in the drawings. In the drawing, 1 is a mold made of high-strength cement, 2 is reinforcing steel,
3 is the formwork, 4 is the wrinkle presser made of high-strength cement, 5 is the
is a mold made of cast iron. A mold for a high-strength cement ring was prepared by arranging a mold and pouring it using the formulation shown in the table.

Curing was carried out after 20°01 days, followed by humid air curing for 50°07 days. The mold was made using a conventional method. At that time, for comparison, 1 was made of cast iron, and 5 was made of high-strength cement.

The above-mentioned mold was set in a Kawasaki Yuko 600 pp-123 press machine, and the pressure was 0.8 at a P pressure of 300t% and a C pressure of 60t.
When pressing tI steel plates, press forming was possible in all cases. When molds 1 and 5 were made of cast iron, it took 20 weeks to complete the molds. In addition, when a high-strength cement ring was used in step 5, the product was completed in about a week, but the vertical part of the product had severe scratches due to ironing.
In the case of the present invention using a mold in step 5, the mold was completed in about one week, and it was possible to press-form the steel plate without damaging the aesthetic appearance of the product.

〔Effect of the invention〕

As described above, according to the present invention, a mold was completed in a short period of about one week, and the surface quality was equal to or better than that of conventional products.

[Brief explanation of drawings]

The drawings are cross-sectional views showing the processing method of the present invention. Code 1... High-strength cement ring mold 2... Reinforcement reinforcing bars 3... Formwork 4... Wrinkle presser 5... Mold patent applicant Denki Kagaku Kogyo Co., Ltd. No change) Note 1 Procedural amendment (method) % formula % 1. Indication of the case 1985 Patent Application No. 203108 2. Name of the invention Processing method of metal plate 6. Person making the amendment Relationship with the case Patent application Number of people: 100 Address: 1-4-1 Yurakucho, Chiyoda-ku, Tokyo Name (
329) Denki Kagaku Kogyo Co., Ltd. Drawing 5, Contents of Amendment Attachment I, -1 (-“,0.・,”5

Claims (1)

[Claims] (1) A method for processing a metal plate, which comprises press-forming a combination of a mold made of high-strength cement and a mold whose surface layer is made of a metal material.