Due to different application scenarios, the processing methods of ball screws are also different. In view of the current status of ball screw processing, the processing technology methods of ball screw are mainly divided into two types: chip processing and chip-free processing. The processing methods of these two ball screws are analyzed below.
1. Treatment with crumbs.
Ball screw chip processing is the use of cutting forming method to process the screw, mainly including turning and whirlwind milling.
Turning refers to the use of different turning tools or other tools on a lathe to process various rotary surfaces, such as: inner and outer cylindrical surfaces, inner and outer tapered surfaces, threads, grooves, etc., turning is usually used to process single-axis parts, such as: Straight shafts and discs, sets of parts.
Eddy current cutting is an efficient thread processing method, suitable for large batches of rough thread processing. Its process is to use carbide cutters to mill threads, which has the advantages of fast cooling and high production efficiency. Threads that do not require high precision can be used to complete cutting.
2. No chip treatment.
Ball screw chipless processing refers to the use of metal plastic forming methods to process the screw, mainly cold extrusion and cold rolling.
The cold extrusion method is a processing method in which the metal blank is placed in the cold extrusion die cavity, and at room temperature, the metal blank is subjected to pressure through a punch fixed on the press to plastically deform the metal blank to make a part.
Tandem cold-rolled sheets are processed by hot-rolled sheets at room temperature. Although the steel sheets are heated during the processing, they are still called cold-rolled. The cold rolling forming process of the ball screw raceway refers to the friction force formed between the roller and the metal round bar under the push of spiral pressure, which bites the metal bar into the rolling zone, and then is forced to roll by the roller to produce plastic deformation.
Compared with traditional cutting processing, chipless processing has higher production efficiency; processing accuracy can be increased by 1 to 2 times; material consumption is less; when metal fibers are torn and the surface quality is not high, the chip processing requires more grinding Process, chip-free processing performance is higher.
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