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軸瓦內徑光洁度和精度要求較高,部頒标准光洁度为▽▽▽8以上,壁厚公差小于0.015毫米。过去我厂采用4呎半齿輪車床加工,光洁度只达到▽▽▽7,壁厚公差0.025毫米,达不到部頒标准。經过很多次試驗,革新成功刮削机。現在刮削白合金軸瓦,光洁度达到▽▽▽▽10～11,壁厚公差0.01毫米,刮削铜鉛合金輪瓦,光洁度达到▽▽▽▽10,产量提高近二倍;刀具寿命增长,一把刮削刀可用一年,加工五至八万件;可加工百种左右規格的产品,且調整快,只需5～10分钟,操作方便,一般生产工人都可掌握。刮削机的結构及其基本原理:刮削机的加工是一种切削与挤压相結合的新工艺。其主要結构有下列三部分(图1): (1) 刮削头体。它用灰鑄鉄制成,包括錐形軸瓦
Bush inner diameter finish and precision requirements are higher, the ministries standard finish ▽ ▽ ▽ 8 above, wall thickness tolerance of less than 0.015 mm. In the past I plant using 4-foot half-gear lathe machining, finish only ▽ ▽ ▽ 7, wall thickness tolerance of 0.025 mm, less than the ministerial standards. After many tests, the successful renovation scraping machine. Now scraping white alloy bushings, finish ▽ ▽ ▽ ▽ 10 ~ 11, 0.01 mm wall thickness tolerance, scraping of copper-lead alloy wheels, finish ▽ ▽ ▽ ▽ 10, the output increased by nearly twice the tool life growth, a scraping Knife available a year, processing five to eighty thousand; Machinable about 100 kinds of specifications of the product, and fast adjustment, just 5 to 10 minutes, easy to operate, the general production workers can grasp. The structure of the scraper and its basic principle: scraper machining is a combination of cutting and extrusion technology. The main structure of the following three parts (Figure 1): (1) scraping head body. It is made of gray cast iron, including tapered bushings