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Grinding oil used for storage hard disk magnetic head superfine grinding

A storage and fine grinding technology, applied in the field of grinding oil, which can solve problems such as head corrosion and head damage

Inactive Publication Date: 2006-10-11
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of the existing grinding oils use extreme pressure additives containing sulfur and phosphorus elements to prevent selective grinding. In the processing of magnetic heads, sulfur and phosphorus elements will react with the friction surface to form chemical reaction films. These chemical reaction films can be used at high temperatures. It plays an anti-wear role under load conditions and can prevent selective grinding; but it is also the formation of a chemical reaction film, which is equivalent to corroding the magnetic head, and corrosion will cause fatal damage to the magnetic head

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: C12 n-paraffin 231g, pentaerythritol ester synthetic oil 70g, antioxidant preservative T5013g, benzotriazole derivative antioxidative preservative 0.2g, IRGALUBE AF 1 liquid ester polymer defoamer 0.1g that Ciba company produces , Antistatic agent nonylphenol polyoxyethylene ether 6g, mix well.

Embodiment 2

[0016] Example 2: Measure 240 g of C11 isoparaffins and 60 g of natural refined rapeseed oil, stir them mechanically under the condition of heating in a water bath at 60°C to make them fully dissolve, then add 3 g of anti-oxidant preservative T501, benzotriazole derivatives for anti-oxidative and anti-corrosion Agent 0.2g, Lubrizol 889D non-silicon defoamer 0.09g, antistatic agent nonylphenol polyoxyethylene ether 6g, fully mixed.

Embodiment 3

[0017] Embodiment three: C13 n-paraffin 210g, poly-alpha olefin synthetic oil 90g, high-temperature antioxidant liquid mixed dialkyl diphenylamine 4g, IRGALUBE AF 1 liquid ester polymer defoamer 0.2g that Ciba company produces, anti-oxidant Static agent N, N-ethylene diester amide 6g, mechanical stirring to make it fully mixed

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PUM

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Abstract

The invention discloses a grinding oil used for superfine grinding of magnetic heads of memory hard disks, belonging to the technical field of surface superfine grinding. The grinding oil contains mineral oil of alkanes from C11 to C13, oily agent, anti-oxidation preservative, defoamer and antistatic agent, and the weight ratio of each component is as follows: mineral oil of alkane 50~94.9 %; oily agent 5-40%; anti-oxidant preservative 0.02-3%; defoamer 0.03-3%; antistatic agent 0.05-4%. The grinding oil is beneficial to be used in superfinishing the magnetic head of the memory hard disk, provides a high-quality grinding surface, and does not cause selective grinding caused by different hardness of different materials on the surface of the workpiece to be processed.

Description

technical field [0001] The invention relates to a grinding oil used for superfine grinding of magnetic heads of memory hard disks, and belongs to the technical field of surface superfine grinding. Background technique [0002] With the increase of the capacity of memory hard disks, the recording density of hard disks increases by tens of percentage points every year, and the requirements for the surface quality of memory hard disk heads are getting higher and higher. [0003] The hard disk heads currently used are composed of AL 2 o 3 , TiC ceramic materials, metal thin films (magnetic materials such as Permalloy and Co-Fe, Fe-AL-Si) and other composite materials, AL 2 o 3 1. The hardness difference between TiC ceramic material and metal film is large. During the grinding process, it is easy to cause selective grinding due to the difference in hardness, so that the grinding rate of the pole tip (Pole Tip) composed of metal film is high, causing the pole tip to sink ( Pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09G1/14
Inventor 马江波高峰雒建斌潘国顺路新春
Owner TSINGHUA UNIV
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