Brass Threaded Keep The Installation Correct
In the process of Brass Threaded turning, it is often worn by Brass Threaded cutters, to collapse the knife and need to reload the knife to the knife, knife to the quality of the knife directly affect the accuracy of the lathe, especially the Brass Threaded repair and turning, need two times clamping two times to the knife, restricting the processing efficiency of the NC lathe processing Brass Threaded, the Brass Threaded precision request is higher, If the trapezoidal Brass Threaded also needs two side to carry on the fine processing, needs the first roughing after the fine lathe knife to carry on the fine processing, if cannot solve the machining process the knife to the knife problem very well, the NC turning Brass Threaded will not be able to obtain the very good application.
CNC Turning Brass Threaded with the common lathe Brass Threaded has a great difference, the general lathe is through the transmission of gear machinery and screw linkage after turning, that is, every turn of the spindle, the tool holder moves a Brass Threaded of the guide, in the whole Brass Threaded processing process of this transmission chain can not be disconnected, otherwise will be disorderly buckle. and NC turning is through the spindle installed on the encoder to send pulse signal into the CNC system, there is CNC system operation control, issued instruction control servo motor through the ball screw control tool to move, realize the turning of Brass Threaded, in order to make the Brass Threaded turning in the more walk knife, not disorderly buckle, By detecting the pulse signal to control the starting position of the Brass Threaded, when the process starts, the spindle rotates, the cutter waits for the spindle encoder to emit the synchronous signal (0-bit signal), then the turning motion, then turning the second cutter Brass Threaded, the cutter returns to the starting point position of the last turning, Or wait to receive the sync signal (0-bit signal) after turning again, so that the turning Brass Threaded is always on the same helix, so there will be no tripping phenomenon.
(1) First turning clamping tool
In the first clamping tool will produce Brass Threaded knife tip and workpiece rotation center of the high phenomenon, generally common in welding knives, because of manufacturing rough, the size of the knife rod is not accurate, the center high need to add gaskets to adjust, the center height of the tool after turning the actual geometric angle. The angle of the tip of the tool is biased, and the angular error of the Brass Threaded tooth is easily produced. The Brass Threaded cutter extends too long, the processing will produce the shock knife, affects the Brass Threaded surface roughness.
(2) Coarse precision vehicle knife to knife
In the process of machining high-precision Brass Threaded and trapezoidal Brass Threaded, it is required to separate the coarse precision of two Brass Threaded cutters, and the offset of two knives to the knife is large (especially z-direction), which will make the Brass Threaded diameter become larger and scrap.
(3) Repair the workpiece to the knife
Repair the workpiece to the knife due to two times clamping workpiece, the repair of the helix and encoder a signal has changed, again repair processing will produce a disorderly buckle.
3. Ways to solve problems
(1) The tool tip of the Brass Threaded must be kept high with the rotary center of the workpiece, and the cutter blade will be used to make the knife on the axis of the workpiece and keep the angle of the tip properly installed. such as the use of CNC clamping tool, because of the high precision of the tool, generally as long as the knife rod by the side of the tool holder can be.
(2) coarse finishing Brass Threaded knife to the knife to set a certain point for the reference point, using the usual method to the knife, in the actual knife in the process of the use of test-cutting method as long as a little adjustment of the knife.
(3) in the Brass Threaded processing, such as the appearance of tool wear or collapse knife, need to again grinding tool after the knife, the workpiece did not remove the repair, only the location of the Brass Threadeded knife installation and the removal of the former position coincide together, which is equivalent to the same car knife processing.
(4) If the workpiece is repaired, the starting point of the processing can be determined to repair work, how to determine the starting point and a signal position, The first Test rod can be used for surface deep 0.05~0.1mm Brass Threadeded turning (all parameters are the same as the required Brass Threaded parameters), the z-value is the distance value of the integer Brass Threaded guide from the right end of the starting point of the Brass Threaded, the surface of the helix is carved, the starting point of the Brass Threaded is determined, and the corresponding position is engraved on the circular surface of the chuck (even if the line and the test bar are in the same axial section