• Luthra Hydro Pneumatic Industries

Two-Stage Special Purpose Machine

Luthra Hydro Pneumatic Industries has designed a special purpose pneumatic machine for assembly shop, which uses a unique system that checks the dimensional accuracy of the male component to be press fitted into the female cavity and after testing for dimensional tolerance subsequently presses the same. The machine has been developed for Bharat Gears, Thane. A steel ball has to be press fitted into the cavity of the gear assembly. The ball should withstand oil pressure in the cavity of up to 4000 bar and as a result needs to be initially tried to be inserted into the cavity at 750 kgf for 15 seconds. Both the force and time are adjustable. If the ball slips into the cavity, the gear assembly is rejected. If the ball can withstand the load, then a force of 1.8 tonnes is applied on it, press fitting it into the cavity. The machine uses a three-stage tandem pneumatic cylinder and has got fully automatic electronic controls. The pressure setting can be varied and the pressing force achieved can be up to 21 tonnes. The force and pressure reading facility is provided on the machine for achieving the exact testing criteria.