Working principle of Deep Hole Scraping and Rolling Machine

The Deep Hole Scraping and Rolling Machine achieves high-precision hole processing through a composite processing process. Its working principle can be divided into two stages:

Scraping stage: The spindle drives the special scraper to rotate at high speed, while making reciprocating feed motion along the axis of the deep hole. The micro-blade structure on the edge of the scraper effectively removes the residual material on the hole wall through mechanical scraping, eliminating the vibration marks and micro-roughness left by boring. The hydraulic vibration device equipped with the machine tool can enhance the scraping effect and increase the surface roughness from Ra3.2μm to Ra0.4μm or more.

Rolling stage: Switch the rolling tool head and use an interference fit rolling body (such as a carbide ball) to roll the hole wall. Under controllable radial pressure, the rolling body and the hole wall have elastic contact, and the surface micro-peaks and valleys are further smoothed through plastic flow. With the spiral feed path of the multi-axis CNC system, straight grain defects can be eliminated and mirror-level processing quality can be achieved.

The Deep Hole Scraping and Rolling Machine tool integrates online detection and closed-loop control functions. It uses a laser probe to provide real-time feedback of aperture data, automatically compensates for tool wear errors, and ensures that deep hole processing accuracy is stable within 0.005mm. It is particularly suitable for the manufacture of precision parts such as hydraulic valve holes and gun barrels.