CNC screw rod grinder

Specifications

This machine is used to grind screw rods for air compressors.

 

 

 

With the SIEMENS 840D CNC controlling system, the machine can easily and effectively obtain 3 axes in linkage out of 7 axes and various movements, such as rotating of workpiece, reciprocating of worktable, feeding of wheel stock, movement of dresser in two directions, and automatic revolving of wheel stock.  

The thread movement is fulfilled by interpolation movements of 2 servo motors, one of which driving workpiece and the other of which driving worktable.

 

The main parts of the machine are all rested upon the cast iron frame, with main controlling mechanism at front of the machine. Plastic-coated sliding guides are adopted for worktable and wheel carriage.

 

On rotary drum of wheel stock rests wheel spindle, which is driven by SIEMENS servo motor (18.5kw).

 

The CNC wheel dresser is able to dress grinding wheels fit to grind screw rod of air compressor.

 

High precision ball screws, including the master screw and cross feeding screw, together with imported bearings used on ball screws and working spindle, guarantee a high work accuracy and sound reliability as well.

 

A special imported grinding wheel with large pores is employed, realizing a high-rate grinding capability.

 

Cooling of the machine is in a mode of mass flow and high pressure coolant injection technique.

 

A fully-closed shield and electrostatic air cleaner greatly improve working environment by reducing oil mist and increasing indoor light.

Main specifications:

Technical date	Model	SK7032
	Specification	F200x750	F320x1000	F3200x1500
Max. mounting diameter	mm	F200	F320	F320
Center distance	mm	750	1000	1500
Center height	mm	≥120	180	180
Max. thread diameter to be ground	mm	F200	F320	F320
Max. depth of screw	mm	35	60	60
Max. helix angle	degree	±55	±60	±60
Number of thread start		1~10	1~10	1~10
Speed of work spindle (C axis)	r/mm	0.5~50	0.5~50	0.5~50
System resolution of X, V, Z, W	mm	0.0001	0.0001	0.0001
C axis	degree	0.0001	0.0001	0.0001
Positioning accuracy of X,V,W		0.005	0.005	0.005
Positioning accuracy of Z axis		0.006	0.006	0.006
Repeated positioning accuracy of X,V,W	mm	0.003	0.003	0.003
Repeated positioning accuracy of Z axis	mm	0.003	0.003	0.003
Positioning accuracy of C axis	Arc second	14	14	14
Repeated positioning accuracy of C axis	Arc second	8	8	8
Max. longitudinal traverse of worktable	mm	500	1000	1400
Grinding wheel diameter	mm	F500~F400	F500~F350	F500~F350
Width	mm	50	120	120
Linear velocity of wheel	m/second	50	50	50
Wheel spindle speed	r/min	1500~3000	1500~3000	1500~3000
Max. weight of workpiece	kg	125	350	440