环状金刚石薄壁钻齿自动冷压工艺研究

Study on automatic cold pressing technology of ring diamond thin wall drilling teeth

一种环状金刚石薄壁钻齿(以下简称环钻)某批次在使用过程中,出现钻齿工作层从焊接层处掉落的问题,最终分析原因是出在生产工艺上。该环钻一直采用在烧结模具中直接装料后再烧结的工艺生产。该工艺中因为需要喷脱模剂,导致装料过程粉料内部混入脱模剂;还有人工装料有不均匀的情况,存在影响产品质量的问题,以及人工装料效率较低的问题。为了解决以上问题,文章通过设计一种环钻自动冷压模具,将粉料先自动冷压成型,再进行烧结的工艺,避免了烧结模具上的脱模剂混入粉料中,减少了一种影响产品质量的因素,同时也提高了效率。实验结果表明,相较在烧结模具中直接装料后再烧结的工艺,环齿自动冷压成型再烧结的工艺在保证质量的前提下可以有效提高生产效率。

A type of circular diamond thin wall drill tooth(hereinafter referred to as ring drill),which has a problem of the working layer of the drill tooth falling from the welding layer during the use of a certain batch of ring drills.The final analysis`shows that the reason is due to the production process.The ring drill have always been produced using the process of directly loading and then sintering in sintering molds.In the production of this process,the need to spray release agent resulted in the mixing of release agent inside the powder during the loading process,as well as uneven manual loading,which had issues affecting product quality and low efficiency of manual loading.In order to solve the above problems,the article designs an automatic cold pressing mold for ring drills.The powder first automatic cold press molding,and then undergoes sintering,avoiding the mixing of release agents on the sintering mold into the powder,reducing a factor that affects product quality,and also improving efficiency.The experimental results indicate that compared to the process of directly loading and then sintering in the sintering mold,the process of automatic cold pressing and sintering of ring teeth can effectively improve production efficiency while ensuring quality.