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Lubricating oil composition for die forging and die forging device

A lubricating oil composition and forging molding technology, applied in lubricating compositions, forging/pressing/hammer devices, manufacturing tools, etc., can solve problems such as shortened die life, reduced molding yield, and poor molding, and achieve lubricity Excellent, long life, and improved molding yield

Inactive Publication Date: 2012-06-20
MITSUBISHI HEAVY IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, the molding yield decreases due to sintering to the mold or poor molding
Second, although components with simple shapes can be molded, it is difficult to mold components with complicated shapes such as scrolls.
Third, the life of the mold is shortened
[0009] However, the lubricant disclosed in Patent Document 1 is a lubricant for casting rather than a lubricant for forging, and the reality is that no non-graphite lubricant having lubricity suitable for forging has been found.

Method used

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  • Lubricating oil composition for die forging and die forging device
  • Lubricating oil composition for die forging and die forging device
  • Lubricating oil composition for die forging and die forging device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The materials shown in Table 1 were weighed, mixed, and stirred to adjust the lubricating oil compositions for forging forming with the compositions shown in Table 1 (Samples 1 to 7). Using the obtained lubricating oil composition for forging forming, a ring compression type friction test was performed to obtain a friction coefficient. The values ​​of the coefficient of friction are shown in Table 1.

[0075] In Table 1, PTFE (0.2-0.3 μm) means PTFE with a particle size of 0.2-0.3 μm, PTFE (7 μm) means PTFE with a particle size of 7 μm, and PTFE (15 μm) means PTFE with a particle size of 15 μm. Zn-DTP(C8) means Zn-DTP with 8 carbons in the alkyl group, Zn-DTP(C10) means Zn-DTP with 10 carbons in the alkyl group, Zn-DTP(C12) means the carbon number in the alkyl group 12 Zn-DTP. PIB stands for polyisobutylene.

[0076] In addition, for comparison, a ring compression friction test was conducted using commercially available graphite-based lubricants and non-graphite-base...

Embodiment 2

[0081]As a solid lubricant, PTFE particles with different particle diameters of 0.2 to 0.3 μm, 7 μm, and 15 μm were prepared, and the effect of improving lubricity was studied by changing the mixing ratio of the PTFE particles with different particle diameters. Lubricating oil compositions for forging forming with the compositions shown in Table 2 were adjusted, and a ring compression friction test was performed to obtain friction coefficients (samples 8, 9, 10, and 11). The results are shown in Table 2. In addition, regarding samples 1, 2, and 4 of Example 1 and samples 8 and 9 of Example 2, the relationship between the mixing ratio of PTFE with a particle size of 0.2 to 0.3 μm and PTFE with a particle size of 7 μm and the coefficient of friction is as follows: Figure 5 shown.

[0082] In addition, the mixing ratio of PTFE was calculated from the mixing amount of PTFE. For example, in Table 2, the mixing ratio of 1.5% PTFE (0.2-0.3μm) and 3.5% PTFE (7μm) is Figure 5 Medi...

Embodiment 3

[0087] The lubricating oil composition for forging and forming processing adjusted to the following composition: PTFE (solid lubricant) 5% in a mixing ratio of PTFE (0.2 to 0.3 μm): PTFE (7 μm) = 50:50, and the carbon number of the alkyl group is 10 Zn-DTP (extreme pressure agent) 0-15%, PIB 3%, rapeseed oil 25%, and the rest is mineral oil. The ring compression friction test was carried out to obtain the friction coefficient (sample 12, 13, 14). The composition and friction coefficient of sample 4, 12, 13, 14 are shown in Table 3, and the change of friction coefficient relative to the concentration of Zn-DTP (extreme pressure agent) is as follows Figure 6 shown.

[0088] In addition, for comparison, the lubricating oil composition for forging forming was adjusted as follows: PTFE (solid lubricant) 0%, Zn-DTP (extreme pressure agent) with 10 carbon atoms in the alkyl group 10%, PIB 3%, 25% of rapeseed oil and the rest of mineral oil (sample 15) were subjected to a ring compr...

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Abstract

Provided is a lubricating oil composition for die forging which has excellent lubricity. Also provided is a die forging device which is suitable also for the lubricating oil composition for die forging. The lubricating oil composition for die forging comprises at least two solid lubricants differing in particle diameter, an extreme-pressure additive, and a base oil as the remainder. The die forging device comprises: a pair of dies, an upper die and a lower die, that is for sandwiching therebetween a material to be forged and forming the material; and a lubricating-oil-composition sprayer for spraying the lubricating oil composition for die forging over the surfaces of the dies. The lubricating-oil-composition sprayer is equipped with an oil supply tank in which the lubricating oil composition for die forging is stored and a supply pipe for sucking up the lubricating oil composition for die forging from the oil supply tank and supplying the composition to a nozzle, the supply pipe having a plurality of suction ports.

Description

technical field [0001] The present invention relates to a lubricating oil composition for forging used for reducing friction between a mold and a molded body during forging. Also, the present invention relates to a forging apparatus suitable for forging using a lubricating oil composition for forging. Background technique [0002] Scrolls are used in compressors and the like constituting air conditioners. The case where the scroll is manufactured by casting, machining, or the like is the mainstream. However, in recent years, for the sake of productivity, high strength, etc., scrolls are increasingly formed and processed using die forging. [0003] In the field of forging forming of aluminum alloys, iron alloys, etc., in order to reduce the friction between the forging material and the die, the forging forming process is generally performed with a lubricant interposed between the forging material and the die. [0004] As the lubricant for forging, a graphite-based lubrican...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M161/00B21J3/00B21J13/02C10M137/10C10M147/02C10N10/04C10N20/06C10N30/06C10N40/24
CPCC10M141/10C10M2213/062C10M2203/1006B21J3/00B21K13/02C10N2240/402C10M2223/045B21K29/00C10N2230/06C10M161/00C10N2220/082B21K3/00C10M169/04C10M2205/026C10M2207/40C10N2250/12C10N2020/06C10N2030/06C10N2040/24C10N2010/04
Inventor 洞口典久池田航介濑户贤坂间勇辅
Owner MITSUBISHI HEAVY IND LTD
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