SU92361A1 - The method of rolling a long and coarse thread - Google Patents

Description

Thread rolling in articles not moving relative to the rollers in thread rolling machines is performed by thread rolling rollers. The maximum length of the thread being rolled is determined by the length of the rolling rollers, and therefore, with modern methods of making rollers, the thread length cannot be long enough, practically it does not exceed 8Q mm with a thread pitch up to Zlya.

For the manufacture of long and coarse threads, rolling is performed in several passes, which increases the cost of production and degrades the quality of the thread. The proposed method allows rolling long and coarse threads from a single pass of the installation. It consists in the fact that when rolling long and coarse thread rolling rollers, the product is forcibly moved in axial direction with respect to roller am. This non-displacement is achieved by violating the ratio of the diameter of the rollers and the product when determining the number of entries. Since the ratio of the diameter of the rollers to the diameter of the product is not a multiple of the number of approaches, the product is unscrewed from the rollers for each turn, i.e. it moves in the axial direction, which makes it possible to roll long and coarse threads with narrow rollers.

Subject invention

The method of rolling long and coarse threads with knurled rollers, characterized in that, in order to force the product to move along its axis, the number of entries is chosen so that the ratio of the diameter of the rollers to the diameter of the product is not a multiple of this Number.