JPS6137979A - Metal product and its manufacture - Google Patents

Abstract

PURPOSE:To manufacture a smooth metal product of mirror surface state inexpensively and in a short period, by covering the surface of meterial to be product with corrosion resisting film, then press forming said material, removing the press flash of the obtained semifinished product by metal corrosion liquid, then dissolving and removing the corrosion resisting film. CONSTITUTION:Both surfaces 1a, b of the sheet material 1 are coated with the corrosion resisting film 2 such as water soluble colloid which is not attacked by the metal etching liquid 3. Next, the coated material 1 is pressed to a prescribed product shape by a pressing apparatus 8. The obtained semifinished product 4 is dipped in the liquid 3 to etch the press flash a1, sheared and roughened surface a2, etc. caused by pressing and said product is faired. The obtained product element body 5 is dipped in a dissolving liquid 6 to dissolve and remove said film 2. The body 5 in which a trace A1 of press flash and a trace A2 of sheared and roughened surface are smooth and mirror surface state is washed by a washing apparatus 11, dried by a dryer 12 to obtain a finished goods A of metal product.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention uses iron, its alloys, aluminum 1-
Aluminum alloy, copper and its alloys, stainless steel and its alloys,
Various metal products that are made of titanium and its alloys and subjected to processing equivalent to drilling or punching, such as electrical and electronic parts, specifically lead frames for integrated circuits,
Connectors, belt-shaped items such as gimbal springs for magnetic heads of floppy disks (TL), sensor springs, sensor step plates for stepping motors, shadow masks (masks for color blurring), fixed-shaped items such as swivel belts for floppy disks, etc. , and its manufacturing method.

(Prior Art) There are a press method and a photoetching method (chemical milling method or chemical milling method).

The former is punched into a predetermined product shape using a press die.

The latter is done by partially photoprinting the required shape on the front and back surfaces of the material to be processed using a photographic method to form a corrosion-resistant film (resist), and then subjecting it to chemical or electrolytic corrosion. This is a shape processing tool, and as a result,
This is a processing method that replaces conventional machining methods, such as press processing and milling methods, such as conventional groove processing, scraping, punching, and perforation.

(Problems to be Solved by the Present Invention) In the pressing method, as shown in FIG. 12, the manufactured metal product 50 has burrs 51 and shear surface roughness 52 peculiar to pressing, and these burrs 51 are caused by contact. Not only can they damage things, but they can also fall off due to some external factor, damaging the floppy disk in the case of a floppy disk and making the data stored on it unusable, and in integrated circuits etc., acting as a conductive medium, causing the circuit to fail. There may be actual harm such as becoming disabled. In addition, when the product 50 is a steel belt for a floppy disk, the sheared surface roughness 52 rubs against each other due to the movement from the white (FIG. 13), and fine particles fall from the rough surface, causing actual damage to the circuit system and floppy disk. Otherwise, there is a risk of deepening the damage on the sheared surface, leading to tearing, and there is also the danger of damaging objects that come into contact with it.

On the other hand, as shown in FIG. 14, the product 60 manufactured by the photo-etching method does not produce burrs or roughened sheared surfaces as in the pressing method, but has the disadvantages that the thickness of the material is limited to a thin product, the manufacturing time is long, and large quantities are required. Inability to produce, high defective rate, high unit price, and residual protrusions 61 (referred to as LJ, lower etching burrs) peculiar to etching.

There are various problems specific to the manufacturing method.

As described above, both the pressing method and the etching method have advantages and disadvantages, but for example, in the field of OAI equipment, EC technology, etc., the product condition is to be free of burrs and shear surface roughness, so the problem is that they are expensive. At present, we have no choice but to rely on the photo-etching method, even though we have left some defects.

(Means for Solving the Problems) The present invention solves the problems in the product and manufacturing method by performing shape forming in the press process, and shaping the burrs and shear surface roughness peculiar to the press in the etching process. This was achieved by doing this.

(Function) The metal product is formed into the desired shape in the pressing process, and only the burrs and roughness on the sheared surface are shaped in the etching process.The thus formed and shaped metal products are free from press burrs, roughness on the sheared surface, and etching burrs.

(Example) Fig. 1 shows a partially enlarged basic configuration of the metal product of the present invention, and this metal product A is made of iron and its alloys.
Copper and its alloys, aluminum and its alloys, stainless steel and its alloys, titanium and its alloys, etc. are press-formed into the desired product shape, and the press burr marks A1
The sheared surface roughness A2 is etched and burred to form a smooth mirror surface.

The thickness of this product A is free within the range from thin to thick so that it can be press-molded into the desired product shape.

FIG. 2 shows the first embodiment of the manufacturing method of the present invention in the order of two steps, in which the plate-shaped product material 1 of the metal product A is coated with a corrosion-resistant film 2 that is not affected by the metal corrosive liquid 3 in the first step (3). Both sides 1
a, 1b are coated, and pressed into a predetermined product shape in the second culm (2) to form a semi-finished product 4. In the 31st step (2), the semi-finished product 4 is immersed in a metal corrosive solution 3 to form a press barrier.
1 and the sheared surface roughness a2 are corroded by the metal corrosive liquid 3 to form the product cable body 5, and in the 41st step (3), it is immersed in the solution 6 to remove the corrosion-resistant film 2 on both the front and back surfaces,
Wash with water in the 5th step V.

It is dried and formed into metal products.

In the first step (2), a corrosion-resistant film 2 is coated on the product material 1 by a coating device 7 prior to the second step (2). The material of this corrosion-resistant film 2 is one that is not attacked by the metal corrosive liquid 3, specifically, a water-soluble or organic solvent-soluble material such as a water-soluble colloid type, a polycinnamic acid type, a cyclized rubber type, a quinone/siaside type, etc. It is something.

In the second step (2), the product material 1 coated with the gold-resistant film 2 on both the front and back sides is press-molded into the desired product shape using the press device 8.

In the third step (2), the press-formed semi-finished product 4 is immersed in a metal corrosive liquid tank 9, and the exposed press pad a1 not covered with the corrosion-resistant film 2 and the roughened sheared surface a2 are corroded with the metal corrosive liquid 3. By removing it, it is shaped into a smooth mirror surface. The metal etchant 3 is generally an acid, for example ferric chloride.

Single wave or composite liquids such as nitric acid, hydrochloric acid, picric acid, or aqueous solutions thereof.

In the fourth process ■, the product body 5 after the press burr at and the shear surface roughness a2 have been shaped is immersed in a solution tank 10, and the corrosion-resistant film 2 on the front and back surfaces is dissolved and removed with the solution 6. . The material of this solution 6 is one that can dissolve the corrosion-resistant film 2. Specifically, for cyclized rubber, it is a mixed solution of carbolic acid, tetrajuethylene, dichlorobenzene, alkylbenzenesulfonic acid, etc., or a mixture of sulfuric acid and peroxybenzene. Examples include a mixture of hydrogen oxide and water, and organic solvents such as acetone and alcohol for quinone/diazide systems.

In the fifth culm V, the substantial metal product that has gone through the fourth step (2) is washed with water in a washing device 11 and dried in a drying device 12.
Clean the entire surface of the product.

In the embodiments that are declined, it is preferable that the metal product Δ is in the shape of an endless band.

FIGS. 8 and 9 show an integrated circuit lead frame (FIG. 8) and a gimbal spring (FIG. 9) as examples of the endless band-shaped metal products A manufactured according to the first embodiment, The entire surface of this lead frame Δ is formed into a mirror-like state, including a smoothly shaped press paring mark Δ1 and a shear surface roughness mark Δ2.

FIG. 10 shows a second embodiment of the manufacturing method of the present invention,
After passing through the first culm (2), the product material 1 is processed by a press device 8 in a second process, and the semi-finished product 4 cut into the desired product shape is dropped into, for example, a basket 13 and stored. After that, the metal product A is formed into a fixed shape through the third process (1) to the fifth process (V) while being placed in the joint 13. Ko=7
- The first step and the third step (2) to the fifth step (2) in the second embodiment are performed in the same manner as in the first embodiment.

FIG. 11 shows a steel belt for a floppy disk as an example of a fixed-shaped metal product A manufactured according to the second embodiment, and this steel belt A has press burr marks A1 and sheared surfaces that have been smoothly shaped. The entire surface including the roughness mark A2 is formed into a mirror surface.

In addition, in the manufacturing method of the present invention, the third
There is no hindrance to adopting a method such as a spray set or a paddle method in place of the immersion method in step (3).

(Effect of the invention) The metal products of the present invention have the following advantages.

(2) Press burrs and shear surface roughness marks are shaped into a smooth mirror surface, and there are no burrs or particles that fall off even when rubbed against each other, making it particularly suitable for parts of various electrical or electronic devices.

■ Since there are no etching burrs or press shear surface roughness, especially press burrs, there is no risk of injury to fingers or damage to objects that come in contact with the product, and this effect is particularly noticeable as the product is thinner.

■ It is inexpensive.

The manufacturing method of the present invention has the following advantages.

■ Shape forming is performed in a press process that can process large quantities in a short time, and the etching process is used to shape the roughness and shear surface roughness peculiar to pressing, where the area ratio to product rest is extremely small. Metal products with press burrs and shear surface roughness marks that are smooth and mirror-like can be produced in large quantities at low cost by processing in a timely manner.

■ Since shape forming is done in a press process, there is a wide tolerance for product thickness, and it is possible to form shapes from thin to thick products in the same amount of time.

■ Product costs decrease in proportion to the number of products produced, allowing products to be provided at low prices.

■ It is useful as a metal oil construction method for both general and special products.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged view of the metal product of the present invention. Figures 2 to 7
The figures show the first embodiment of the manufacturing method of the present invention, Fig. 2 is an overall process diagram, Fig. 3 is an enlarged sectional view taken along line (3)-(3), and Fig. 4 is (4) = (4) An enlarged cross-sectional view along line (5)-(5), Figure 6 is an enlarged cross-sectional view along line (6)-(6), Figure 7 is (7)
- (7) An enlarged sectional view along the line. 8 and 9 are plan views respectively showing examples of metal products manufactured by the manufacturing method of the first embodiment. FIG. 10 is a process diagram showing a second embodiment of the manufacturing method of the present invention. FIG. 11 is a plan view showing an example of a metal product manufactured by the vJ-zukuri method of the second embodiment. FIG. 12 is a partially enlarged sectional view of a metal product formed by a conventional press method. 13th
The figure is a perspective view showing a steel belt for a seven-way disc formed by a press method. FIG. 14 is a partially enlarged sectional view of a metal product formed by a conventional photoetching method. In the figure, A is a metal product Δ1 is a press burr trace △2 is a shear surface rough trace al is a press burr RJ Dissolved liquid patent Applicant: Iwata Denko Co., Ltd. (Patent Office Examiner) 1. Indication of the case 2, Name of the invention Metal products and their manufacturing method 3, Relationship with the person making the amendment Patent applicant Name Iwata Denko Co., Ltd. 4 Agent address 5-chome, Hakusan, Bunkyo-ku, Tokyo 14 No. 7 No. 6, Full text of the specification to be amended 7, Contents of the amendment Amended specification 1, Title of the invention Metal products and manufacturing method thereof 2, Claims ■ Pressed products, the press A metal product characterized by having a smooth mirror-like surface in which burr marks and shear surface marks have been shaped by etching. ■ The surface of the plate-shaped product material is coated with a corrosion-resistant film that is not affected by metal corrosive liquid, and then the material is press-formed into the desired product shape to create a semi-finished product, which is then coated with metal corrosive liquid. The press burrs and shear surface roughness were shaped into a smooth mirror surface to obtain a product body, and then the corrosion-resistant film on the product body was removed with a solution, washed, and dried to obtain a finished product. A method of manufacturing a metal product characterized by: 3. Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to materials such as iron and its alloys, aluminum and its alloys, copper and its alloys, stainless steel and its alloys, titanium and its alloys, etc., which can be used for drilling or punching. Various metal products that undergo corresponding processing, such as electrical and electronic parts, specifically integrated circuit frames, connectors, band-shaped items such as gimbal springs for magnetic heads of floppy disks, sensor springs, and stepping stones. It relates to fixed-shaped products such as sensor step plates for motors, shadow masks (masks for color televisions), and steel belts for floppy disks, as well as their manufacturing methods. (Prior art) There are a pressing method and a photo-etching method (chemical milling method or chemical milling method). The former is punched into a predetermined product shape using a press die. The latter is done by partially photoprinting the required shape on the front and back surfaces of the material to be processed using a photographic method to form a corrosion-resistant film (resist), and then subjecting it to chemical or electrolytic corrosion. This is a shape processing tool, and as a result,
This is a processing method that replaces conventional machining methods, such as press processing and milling methods, in place of conventional grooving, scraping, punching, drilling, etc. (Problems to be Solved by the Present Invention) In the pressing method, as shown in FIG. 12, the manufactured metal product 50 has burrs 51 and shear surface roughness 52 peculiar to pressing, and these burrs 51 are caused by contact. In addition to damaging things, In2 may drop due to some external factor, damaging the floppy disk in the case of a floppy disk and making the stored data unusable, and acting as a conductive medium in integrated circuits, causing the circuit to fail. There may be actual harm such as becoming disabled. In addition, when the product 50 is a steel belt for a floppy disk, the sheared surface roughness 52 rubs against each other due to its own movement (Fig. 13), and particles fall from the roughness, causing actual damage to the circuit system and floppy disk. Or, there is even a risk that the sheared surface will deepen the damage and lead to tearing.
It also causes actual damage to objects it comes in contact with. On the other hand, as shown in FIG. 14, the product 60 manufactured by the photo-etching method does not produce burrs or roughened sheared surfaces as in the pressing method, but has the disadvantages that the thickness of the material is limited to a thin product, the manufacturing time is long, and large quantities are required. Inability to produce, high defective rate, high unit price, and residual protrusions 61 (hereinafter referred to as etching burrs) peculiar to etching. There are various problems specific to the manufacturing method. In this way, both the pressing method and the photo-etching method have advantages and disadvantages, but for example, in the 0△ equipment field, EC technology field, etc., the product condition is that there is no burr or sheared surface roughness, so the problem is that they are expensive. At present, we have no choice but to rely on the photo-etching method, even though we are still leaving the mark intact. (Means for Solving the Problems) The present invention solves the problems in terms of products and manufacturing methods by performing shape forming in a press process, and shaping the burrs and shear surface roughness of the press by using an etching process. This was achieved by (Function) The metal product is formed into the desired shape in the pressing process, and only burrs and roughness on the sheared surface are shaped in the etching process.The thus formed and shaped metal products are free from press burrs, roughness on the sheared surface, and etching burrs. (Example) Fig. 1 shows a partially enlarged view of the basic structure of the metal product of the present invention.
Copper and its alloys, aluminum and its alloys, stainless steel and its alloys, titanium and its alloys, etc. are press-formed into the desired product shape, and the press burr marks A1
The shear surface roughness A2 is etched and shaped into a smooth mirror surface. The thickness of this product is free within the range from thin enough to thick enough to be press-molded into the desired product shape. FIG. 2 shows the first embodiment of the manufacturing method of the present invention in the order of steps. In the first step, a corrosion-resistant film 2 that is not damaged by a metal corrosive solution 3 is applied to both sides of a plate-shaped product material 1 for making a metal product. Both sides 1a
, 1b, and is pressed into a predetermined product shape in the second step (■) to form a semi-finished product 4. In the third step (■), the semi-finished product 4 is immersed in a metal corrosive liquid 3 to form a press barrier a1.
Then, the sheared surface roughness a2 is etched by the metal corrosive liquid 3 to form the product body 5, and in the fourth step v, it is immersed in the solution 6 to remove the corrosion-resistant film 2 on both the front and back surfaces.
Wash with water in the 5th step V. After drying, metal product A is formed. In the first step, prior to the second step (2), the product material 1 is coated with a corrosion-resistant film 2 using a coating device 7. The material of this corrosion-resistant film 2 is one that is not affected by the metal corrosive liquid 3, specifically, water-soluble or organic materials such as water-soluble colloid, polycinnamic acid, cyclized rubber, quinone/sheaside, and marker ink. It is solvent soluble. In the second culm (2), a press device 8 press-forms the product material 1 coated with the anti-corrosion film 2 on both the front and back sides into a desired product shape. In the third culm ■, the press-formed semi-finished product 4 is immersed in a metal corrosive liquid tank 9, and the exposed press barrier a1 and sheared surface roughness a2 that are not covered with the corrosion-resistant film 2 are corroded with the metal corrosive liquid 3. By removing it, it is shaped into a smooth mirror surface. The metal etchant 3 is generally an acid, for example ferric chloride. Single wave or composite liquids such as nitric acid, hydrochloric acid, picric acid, or aqueous solutions thereof. In the fourth step IV, the product body 5 after the press barrier a1 and the shear surface roughness a2 have been shaped is immersed in a solution tank 10, and the corrosion-resistant film 2 on the front and back surfaces is dissolved and removed by the solution 6. The material of this solution 6 is one that can dissolve the corrosion-resistant film 2. Specifically, for cyclized rubber, it is a mixed solution of carbolic acid, ethylene tetrachloride, dichlorobenzene, alkylbenzene sulfonic acid, etc., or a mixture of sulfuric acid and peroxide. These include hydrogen-water mixtures, water-soluble colloids, polycinnamic acid systems, quinone diazide systems, and organic solvents such as acetone/alcohol and trichlene for marker inks. In the fifth step V, the substantial metal product A that has passed through the fourth process (2) is washed with water in a washing device 11 and dried in a drying device 12.
Clean the entire surface of the product. In the embodiments mentioned above, it is preferable that the metal product A is in the form of an endless band. FIGS. 8 and 9 show a 71-nome for integrated circuits (FIG. 8) and a gimbal spring (FIG. 9) as examples of the endless strip-shaped metal products A manufactured according to the first embodiment, The entire surface of this frame A, including the press burr mark A1 and the shear surface roughness mark A2, which have been shaped smoothly, is formed into a mirror-like state. FIG. 10 shows a second embodiment of the manufacturing method of the present invention,
After passing through the first process, the product material 1 is processed by a press device 8 in a second process, and the semi-finished product 4 cut into the required product shape is, for example, llI! After falling into the basket 13 and being stored therein, the metal product is molded into a regular-shaped metal product through the third step (1) to the fifth step (8)-8 while being placed in the basket 13. The first step (2) and the 31st step (2) to the fifth step V in this second embodiment are performed in the same manner as in the first embodiment. FIG. 11 shows a steel belt for a floppy disk as an example of a fixed-shaped metal product A manufactured according to the second embodiment, and this steel belt A has smooth press burr marks △1 and shear marks. The entire surface including the surface roughness mark △2 is formed into a mirror surface. In addition, in the manufacturing method of the present invention, the third
There is no hindrance to adopting a method such as a spray set or a paddle method in place of the immersion method in step (3). (Effects of the Invention) The metal products of the present invention have the following advantages. (2) Press burrs and shear surface roughness marks are shaped into a smooth mirror surface, and there are no burrs or particles that fall off even when rubbed against each other, making it particularly suitable for parts of various electrical or electronic devices. ■ Since there are no etching burrs or press shear surface roughness, especially press burrs, there is no risk of injury to fingers or damage to objects that come in contact with the product, and this effect is particularly noticeable as the product is thinner. ■ It is inexpensive. The manufacturing method of the present invention has the following advantages. ■ Shape forming is done in a press process that can process large quantities in a short time, and the etching process is used to quickly shape the edges and roughness of the sheared surface, which are unique to pressing, where the area ratio to the entire product is extremely small. , it is possible to manufacture metal products in large quantities and at low cost, in which press burrs and shear surface roughness marks are smooth and mirror-like. ■ Shape forming is done in a press process, so there is a wide tolerance for product thickness, and it is possible to form shapes from thin to thick items equally in a short time. ■ Product costs decrease in proportion to the number of products produced, allowing products to be provided at low prices. ■ It is useful as a metal processing method for both general and special products. 4. Brief description of the drawings Figure 1 is a partially enlarged view of the metal product of the present invention. Figures 2 to 7
The figures show the first embodiment of the manufacturing method of the present invention, Fig. 2 is an overall process diagram, Fig. 3 is an enlarged sectional view taken along the line <3)-(3), and Fig. 4 is an enlarged cross-sectional view along the line (4)- (4) An enlarged cross-sectional view along line (5)-(5), Figure 6 is an enlarged cross-sectional view along line (6)-(6), Figure 7 is <7)
- (7) An enlarged sectional view along the line. 8 and 9 are plan views respectively showing examples of metal products manufactured by the manufacturing method of the first embodiment. FIG. 10 is a process diagram showing a second embodiment of the manufacturing method of the present invention. FIG. 11 is a plan view showing an example of a metal product manufactured by the manufacturing method of the second embodiment. FIG. 12 is a partially enlarged sectional view of a metal product formed by a conventional press method. FIG. 13 is a perspective view showing a steel belt for a floppy disk molded by a press method. FIG. 14 is a partially enlarged sectional view of a metal product formed by a conventional photoetching method. In the figure, A is the metal product A1 is the press burr mark A2 is the shear surface roughness mark al is the press burr a2 is the shear surface roughness 1 is the product material 2 is the corrosion resistant film 3 is the metal corrosive liquid 4 is the semi-finished product 5 is the product body 6 Solution

Claims (2)

[Claims] (1) A metal product that is a pressed product, and the press burr marks and shear surface marks are shaped into a smooth mirror surface by etching. (2) The surface of the plate-shaped product material is coated with a corrosion-resistant film that is not affected by metal corrosive liquid, and then the material is press-formed into the required product shape to make a semi-finished product. The press burrs and shear surface roughness are shaped into a smooth mirror surface using a corrosive solution to form a product body, and then the above-mentioned corrosion-resistant film on the product body is removed with a dissolving solution, washed, and dried to obtain a finished product. A method of manufacturing a metal product characterized by: