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Views: 2 Author: Site Editor Publish Time: 2025-05-13 Origin: Site
The cold rolling and grinding processes for ball screws differ significantly in terms of principles, processing procedures, and applicable scenarios. Here is a specific comparison:
1. Process Principles
1.1 Cold Rolling (Cold Forming): At room temperature, pressure is applied to metal materials through molds to cause plastic deformation and form threads. Relying on the material's ductility, no material is cut; it is directly formed.
1.2 Grinding (Grinding Processing): The surface of the already formed lead screw is machined and polished using grinding wheels and other abrasives to remove material and achieve high precision. This is a finishing process that requires coordination with preliminary rough machining (such as turning or cold rolling).
2.Processing Process
2.1 Cold Rolling
Process: Raw material → Cold rolling die forming → Heat treatment → Surface treatment.Characteristics: One-time forming, high efficiency, suitable for mass production.
2.2 Grinding
Process: Rough machining (turning/cold rolling) → Grinding threads → Precision grinding → Super precision processing.
Characteristics: Staged processing, requires multiple parameter adjustments, time-consuming.
3.Comparison of advantages and disadvantages
/ | Cold Rolled | Grinding |
accuracy | Medium precision (requires subsequent processing to improve) | Extremely high precision (up to micrometer level) |
surface quality | There is a cold work hardening layer on the surface, and the finish is generally average. | The surface is smooth. |
material utilization rate | High (no cutting loss) | Low (requires removal of a large amount of material) |
production cost | Low (high mold cost, but low per-unit cost) | High (high costs for equipment and consumables) |
Applicable materials | Metals with good ductility, such as carbon steel and stainless steel | Most metals (require preliminary rough processing) |
4.Application scenarios:
4.1 Cold rolling:
Mass production of standard parts (such as general industrial equipment).
Scenarios sensitive to cost and not requiring extreme precision.
4.2 Grinding:
High precision and high load requirements (such as CNC machines, precision instruments).
Small batch customization or processing of special materials.
5.Summary Recommendations
5.1 Prioritize cold rolling: for high efficiency, low cost, and good material ductility.
5.2 Prioritize grinding: for extremely tight tolerances, high surface finish, or insufficient material ductility.
5.3 Combined use: some high-end products are first cold rolled to shape, then ground to improve precision.