JP2960197B2 - Metal processing method and metal processing oil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metalworking method and a metalworking oil, and more particularly, to supplying a specific volatile oil during a machining process such as ultra-precision machining of an electronic component such as a magnetic disk or an aluminum fin. Accordingly, the present invention relates to a method for efficiently and safely performing metal working by omitting a degreasing step, and a metal working oil useful for various kinds of metal working.

[0002]

2. Description of the Related Art
In the ultra-precision processing of electronic parts and the like and the processing of aluminum fins and the like, oils prepared by blending an oily agent with low-viscosity mineral oil and solvents such as polybutene have been used. However, when processed with the above oil agent, the workability is insufficient, and the oil agent remains on the workpiece after processing, so a degreasing step is required. Sex was inhibited. On the other hand, in the case of using a solvent such as polybutene, the degreasing step can be omitted, but the processing performance is reduced and a desired processed product cannot be obtained, and when an oil agent or the like is added thereto, the same as the oil agent described above. Problems tend to occur.

Therefore, the present inventors have solved the above-mentioned disadvantages of the conventional oils and solvents, can omit the degreasing step, and at the same time, have a good workability and a method capable of performing efficient metal working. We worked diligently to develop metalworking oils.

[0004]

As a result, by using a volatile oil containing a straight-chain olefin having 14 or less carbon atoms obtained by polymerization of ethylene in a processing step,
It has been found that the above object can be achieved. The present invention has been completed based on such findings.

That is, according to the present invention, when a metal material is processed, (a) a carbon material having a carbon number of 14 obtained by polymerization of ethylene;
A volatile oil containing a solvent having a boiling point of 300 ° C. or less selected from the group consisting of the following linear olefins and (b) polybutene, polypropylene and an alcohol having 1 to 12 carbon atoms, The present invention provides a metalworking method characterized by continuously or intermittently supplying oil to a metal. The present invention also provides a metal working oil comprising the volatile oil agent.

Various metal materials can be processed by the method of the present invention. Specifically, (1) aluminum and aluminum alloys and rolling, cutting,
Suitable examples include a plate material that has been cut or the like and (2) a material obtained by roughly processing an aluminum alloy into a disk shape or the like.

The processing steps performed by the method of the present invention may be one step alone or a combination of two or more steps. Here, there are various types of processing, and examples thereof include drawing, ironing, punching, hole expanding, curling, and superfinishing. In the method of the present invention,
One of these processes is performed alone, or two or more of these processes are combined, or the same type of process is repeated a plurality of times.

Specific examples of the processing method include a fin processing for forming an aluminum fin for a room air conditioner or a car air conditioner, and a forming processing of a magnetic disk. Here, as the fin processing, for example, there is a drawless type processing, which is punching and ironing (ioning).
And the respective processes of curling. The magnetic disk is formed by a combination of ultra-precision processing. More specifically, after roughing, the surface A is processed with ultra-precision, then the surface B is processed with ultra-precision, and then mirror-finished. It is.

Next, the processing oil (metal working oil) used in the method of the present invention is, as described above, a volatile oil containing a linear olefin having 14 or less carbon atoms obtained by polymerization of ethylene as the component (a). It is. Here, the linear olefin is an oligomer obtained by polymerizing 2 to 7 ethylene, and is composed of one kind or a combination of two or more kinds.
The linear olefin includes a linear-1-olefin or a linear-2-olefin. The linear olefin has a carbon number of 14 or less, but may have a carbon number of 15 or more in a proportion of less than 50% by weight.

[0010] Volatile oil agent (metal working oil) used in the present invention
Is at least one compound selected from the group consisting of (a) a linear olefin and (b) polybutene, polypropylene and an alcohol having 1 to 12 carbon atoms, and having a boiling point of 3
A combination of a solvent at a temperature of 00 ° C. or lower, particularly 250 ° C. or lower can be given. Here, (b) the polybutene constituting the solvent having a boiling point of 300 ° C. or lower is a homopolymer of isobutene or a copolymer of isobutene and n-butene,
Polypropylene is a homopolymer of propylene or a copolymer of propylene with ethylene or butene,
Both have relatively low molecular weights. In addition, carbon number 1
Examples of the alcohols Nos. To 12 include methyl alcohol, ethyl alcohol, various propyl alcohols, various butyl alcohols, various amyl alcohols, various hexyl alcohols, various octyl alcohols, various nonyl alcohols, and the like.

[0011] The solvent (b) must have a boiling point of 300 ° C or less. Here, if the boiling point exceeds 300 ° C., the degreasing property is undesirably reduced. In the volatile oil agent (metal working oil) in the present invention, the mixing ratio of (a) the linear olefin and (b) the solvent is not particularly limited, but is usually (a) 2 to 98% by weight of the linear olefin, Preferably 5
To 50% by weight, and (b) 98 to 2% by weight of the solvent, preferably 95 to 50% by weight.

The volatile oil agent (metal working oil) of the present invention is composed of a mixture of the above-mentioned (a) linear olefin and (b) a solvent. If desired, various additives such as an antioxidant, Corrosion inhibitors, oil agents, extreme pressure agents and the like can be appropriately added in a range of 10% by weight or less.

In the method of the present invention, the volatile oil agent is
The part to be processed of the target metal material is intermittently or continuously supplied with oil at the beginning and during the processing step. There are various methods for oiling at this time, and immersion or coating may be used, but mist oiling is particularly preferable. In addition, the volatile oil agent is used in an amount of 0 to 15;
Cooling to about ° C and refueling is more effective.

[0014]

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. Example 1 (Ultra-precision processing experiment (mirror surface processing of magnetic disk)) Magnetic disk substrate (diameter 5 inches) manufactured by cutting, punching, and roughing (NC lathe processing) a coil material of an aluminum alloy (A5052) Then, ultra-precision processing was performed under the following conditions. In this processing, the B-side processing was performed by omitting the degreasing step after the A-side processing. The results are shown in Table 1.

[0015] Article matter processing machines: turning tool: single-crystal diamond byte rotation speed: 500 rpm Feed rate: 0.03 mm / rotation cut: 15 [mu] m Volatile oil: straight-chain 1-olefins (a mixture of C ₁₂ and C ₁₄₎ Polybutene (boiling point 165-200 ° C) 3
0:70 (weight ratio) mixture Lubrication method: Mist lubrication (The lubrication tank was cooled to 5 ° C or less and refueled.)

Comparative Example 1 Polybutene (boiling point: 165 to 200 ° C.) as a volatile oil agent
An ultra-precision machining experiment was performed in the same manner as in Example 1, except that was used alone. The results are shown in Table 1.

Comparative Example 2 Ultra-precision processing experiment was performed in the same manner as in Example 1 except that a 98: 2 (weight ratio) mixture of paraffinic mineral oil (kinematic viscosity at 40 ° C., 8 cSt) and oleic acid was used as a volatile oil agent. Was done. The results are shown in Table 1.

[0018]

[Table 1]

Example 2 (Aluminum fin processing experiment) A so-called drawless type aluminum plate (A1200) having a thickness of 0.110 mm coated with water glass was processed to continuously form aluminum fins for a room air conditioner. . That is, after the aluminum plate was immersed in an oil agent, piercing (piercing), burring, ironing (ironing), and refrea were performed. The conditions of the ironing here are as follows. Punch (carbide) outer diameter 9.86mm die (Carbide) internal diameter 9.98mm fin pitch 1.6mm ironing 54% The refueling during ironing processing step, volatile oil (straight-chain 1-olefins (C ₁₂ and C a mixture of ₁₄₎ and polybutene (20:80 (weight ratio) mixture of boiling one hundred sixty-five to two hundred ° C.)), and mist lubrication from oil tank and cooled to 5 ° C.. In the continuous machining, 32 holes were machined in one row, and the machining speed was 250 strokes / min and 100,000 strokes. As a result, the occurrence of color jumps and the occurrence of seizure in the ironed portion were not observed, the oil agent did not adhere, and the degreasing step was unnecessary.

Comparative Example 3 Polybutene as a volatile oil agent (boiling point: 165 to 200 ° C.)
An aluminum fin processing experiment was performed in the same manner as in Example 2, except that was used alone. As a result, the occurrence rate of color jump was 10%. In addition, there was no adhesion of the oil agent, and the degreasing step was unnecessary.

Comparative Example 4 An aluminum fin processing experiment was performed in the same manner as in Example 2 except that a 98: 2 (weight ratio) mixture of paraffinic mineral oil (kinematic viscosity at 40 ° C., 8 cSt) and oleic acid was used as a volatile oil agent. Was done. As a result, the occurrence rate of color jump was 3%, and there was much adhesion of the oil agent, and a degreasing step was required.

Examples 3 to 6 and Comparative Examples 5 to 8 Both surfaces of a magnetic disk substrate (diameter: 5 inches) made of an aluminum alloy (A5052) were precision machined under the following conditions. In this case, the degreasing step was omitted. As for the relative surface roughness, the average surface roughness of the magnetic disk after processing was measured, and the average surface roughness / theoretical surface roughness (8.0 μm) was measured.
The value of m) was defined as the relative surface roughness. The smaller the relative surface roughness (ie, the closer to 1), the better the workability. The results are shown in Table 2.

[0023] Article matter processing machines: turning tool: diamond single crystal bytes tip R value R = 0 before the incisors angle θ = 15 ° rotational speed: 500rpm feed rate: 0.05mm / rotation cut: 15μm cutting speed: 60m / min. Volatile oils: As shown in Table 2

[0024]

[Table 2]

[0025] * 1 rating in C ₁₂ and mixtures * 2 boiling 165~200 ℃ * 3 (kinematic viscosity 8cSt of 40 ° C.) paraffinic mineral oil * 4 oleate * 5 adhered oil amount of C ₁₄

[0026]

As described above, according to the method of the present invention, not only the degreasing step can be omitted, but also various metal materials can be processed with high safety and high processing performance. Also, there are various processed products obtained by using the method of the present invention or the metal working oil of the present invention, including aluminum fins, magnetic disks, video disks, VTR drums, and the like. Effective and widely used for metal working.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ identification code FI C10N 30:00 40:24 (58) Investigated field (Int.Cl. ⁶ , DB name) C10M 105/04 C10M 105/12 C10N 40:24

Claims (4)

(57) [Claims] In processing a metal material, (a) a linear olefin having 14 or less carbon atoms obtained by polymerization of ethylene, (b) polybutene, polypropylene and 1 carbon atom
Metal working characterized in that at least one kind of volatile oil containing a solvent having a boiling point of 300 ° C. or lower selected from the group consisting of alcohols of 12 to 12 is continuously or intermittently supplied to a processed portion of a metal material. Method. 2. The volatile oil agent comprises: (a) a linear olefin 5 to 5
2. The metal working method according to claim 1, comprising 50% by weight and (b) 95 to 50% by weight of the solvent. 3. A compound having a boiling point of at least one selected from the group consisting of (a) a linear olefin having 14 or less carbon atoms obtained by polymerization of ethylene and (b) polybutene, polypropylene and an alcohol having 1 to 12 carbon atoms. A metalworking oil consisting of a volatile oil containing a solvent at a temperature of at most ℃. 4. The metalworking oil according to claim 3, wherein the volatile oil agent comprises (a) 5 to 50% by weight of a linear-1-olefin and (b) 95 to 50% by weight of a solvent.