Model Lk8810 CNC Broaching Machine for Internal Thread

machine Dric：

This is a latest generation of broaching machine for internal thread newly designed and manufactured by Changsha Machine Tool Works. Being equipped with CNC system and A. C. servodriven device, it overcomes the shortcomings of low accuracy and single-assortment of machined part compared with mechanical-driven broaching machine. It's efficiency is over ten times of that of a lathe in machining internal thread. And the error of thread pitch and starting point can be controlled in definite range with stable and reliable accuracy. The machine is a sophisticated one filling in the gaps in China in broaching various types of high precision internal thread in mass production especially in tractor or auto-building industry, war industry and electric tool industry.

TECHNICAL SPECIFICATIONS：

Rated torque×Max. stroke	1000×550	N.m×mm
Feed speed of main slider	0.001~14.0	m/min
Return speed of main slider	≤14.4	m/min
Rotational speed of tool holder	0~50	rpm
Max. stroke of auxiliary slider	240	mm
Broach delivery speed of auxiliary slider	2~6	m/min
Return speed of auxiliary slider	≤9	m/min
Size of table surface(L×W)	495×325	mm
Bore of rotating tool-holder	φ40H7	mm
Bore of auxiliary tool-holder	φ36H7	mm
Hydraulic pump
Delivery	32	L/min
Pressure	4	Mpa
Cooling and chip wash-away device
Delivery	25	L/min
Pressure	25	Mpa
Z axes A. C. servo-controlled motor	37	N.m
C axe A. C. servo-controlled motor	60	N.m
Motor for hydraulic oil pump	3	kw
Motor for chip wash-away	1.5	kw
Overall dimentions of machine(L×W×H)	3400×320×3600	mm
Net weigh	8000	kg
Machining accuracy
Error of thread pitch	≤±0.015	mm
Error of starting point of thread	≤±0.015	mm
Surface roughness of broached part	6.3