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Dressing and manufacture of outer blade cutting wheel

A technology of cutting wheels and outer blades, which is applied in the direction of manufacturing tools, bonded grinding wheels, and grinding machine parts, etc., can solve problems affecting cutting performance, cutting accuracy errors, etc., and achieve efficient and satisfactory dressing results

Active Publication Date: 2013-07-10
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The satisfaction of the trimming treatment greatly affects the cutting performance after preparation or after recovery, such as leaving cutting marks on the cutting surface, or causing errors in cutting accuracy

Method used

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  • Dressing and manufacture of outer blade cutting wheel
  • Dressing and manufacture of outer blade cutting wheel
  • Dressing and manufacture of outer blade cutting wheel

Examples

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Effect test

example 1

[0075] A cemented carbide substrate in the form of an annular thin disk held by clamping it between a pair of circular clamps, as figure 1 , 2A and 2B, the annular thin disc has an inner diameter of 60 mm and an outer diameter of 133 mm. The circular clamp had an outer diameter 2 mm smaller than that of the base so that the outer edge of the base protruded 1 mm beyond the outer circumference of the clamp. Electroplating was performed in Nickel Bath #1 as defined below to deposit the undercoat. The substrate is then held by clamping it between a pair of circular clamps 2, 2, as figure 1 , 2A and 2C. The circular clamps 2, 2 have an outer diameter 2 mm larger than that of the base body. Permanent magnet segments are built into the outer peripheral portion of the jig. The space defined between the outer peripheral portions of each clamp ( Figure 2C ) was filled with 0.8 g of diamond abrasive particles pre-coated with magnetic material (nickel) and having an average partic...

example 2

[0117] Outer blade cutting wheels were fabricated as in Example 1, except that layer plating was omitted and instead a Sn-Pb alloy was infiltrated into the abrasive layer or blade portion. The infiltration of the Sn-Pb alloy is carried out by the following process: the substrate carrying the blade part is placed on a heating plate at 230° C.; the substrate is heated for 5 minutes; using a soldering iron at 230° C. A wire of the alloy is melted; the molten alloy is applied to the hot blade portion on the substrate; the alloy is allowed to infiltrate; and the blade portion is allowed to cool down.

[0118] Using the outer blade cutting wheel, under the same conditions as in Example 1, the rare earth permanent magnet block (Nd-Fe-B magnet) was cut and processed into magnet pieces. Figure 9B is a photograph showing the cut surface of the cut magnet piece. Depend on Figure 9B It is evident that the cut surface is smooth and there are no cut marks. Using the outer blade cutting...

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Abstract

An outer blade cutting wheel (1) comprising a base and a blade section (11) of metal or alloy-bonded abrasive grains is dressed by clamping the cutting wheel between a pair of circular jigs (2) such that the blade section (11) projects beyond the jigs, immersing the cutting wheel in an electropolishing liquid, positioning counter electrodes (4, 5, 6) relative to the blade section, and effecting electropolishing for thereby removing part of the metal or alloy bond and chips received in chip pockets until abrasive grains are exposed on the blade section surface.

Description

technical field [0001] The present invention relates to a method for trimming an outer diameter blade cutting wheel comprising a cemented carbide base body in the form of an annular thin disc, and a blade portion formed on the outer periphery of the base body, the blade Part is an abrasive layer comprising abrasive grains and a metal or alloy binder used to bond the grains to each other and to the substrate. Background technique [0002] A sawing method using an outer diameter blade cutting wheel for cutting rare earth permanent magnets (sintered magnets) is known. With a number of advantages - these include inexpensive cut-off wheels, acceptable cut allowances for use with hard metal blades, high dimensional accuracy of the workpiece, relatively high processing speeds, and batch sizes for manufacturing, the outer blade cuts off Technology is widely used in the cutting of rare earth sintered magnets. [0003] Patent Documents 1 to 3 disclose outer blade cutting wheels for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B53/12
CPCB23H7/02B23H9/00B24B53/001B24D3/00B24D5/12B24D18/0018C23C18/1603C23C18/1651C23C18/1662C23C18/36C25D3/12C25D5/02C25D5/10C25D5/14C25D15/00C25D17/06C25D17/12C25F3/22C25F7/00C25D5/009B28D1/24
Inventor 前川治和山口隆治岛尾正信
Owner SHIN ETSU CHEM IND CO LTD
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