The Technique of Lapping
To minimize idle times and manual handling of the workpieces, machines are being automated more and more (Figures 41 + 42). Lapped parts must be thoroughly washed after machining. This can be performed with ultrasound in a quick-drying, non-staining fluid. The environment, i.e. the working process, washing process and handling are increasingly determining the peripheral equipment of the machine.
Existing environmental regulations require the modification of entire processes. “Clean lapping” is becoming a topical subject (also see the top of Page 17). Disposal of used lapping agent is becoming more difficult and expensive. Machining processes involving bound grit and machines with flood-type rinsing systems already conform with the new tendencies. Only washing systems using water as a cleaning agent will be permissible in future. The requirement for spotless drying will make the washing process longer and more complicated. Blind holes, threads and assembled parts will cause difficulties. Hot-air or vacuum drying is recommended for this purpose.
The machines shown in Figures 60 + 61 permit dust and vapor-free working with continuous or subsequent flood-type rinsing with filtered working fluid. The abraded material is thus collected outside the machine and can be automatically filtered, dried and disposed of in this way.