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Share with you a successful case of a comprehensive solution for hole machining of shaft parts:

▲照片 of the sectioned part of the processing

▲X-ray view

▲ Sectional view

The overall solution of Puk Precision can effectively improve the processing efficiency, not only greatly improve the tool life, but also reduce the tool change time. Below are the results calculated based on one production line with an annual output of 900,000 pieces:

1. Saving processing time:747.1 hours;

2. Saving about 74,703 yuan in machine tool depreciation and labor costs;;

3. Savingabout 174,733 yuan in tooling costs;

Save about 249,436 yuan in total;

• Product Name: Coupling;

• Material grade:40Cr;

• Material hardness: HRC22-28;

• Processing requirements:D8.25 and D7.7 holes with coaxiality of 0.04, wall roughness of D7.7 hole Ra1.6;

• Processing equipment: horizontal lathe, emulsion fluid internal cooling, spring chuck clamping;

• Production:900,000 pieces/year;

 Design features of the plain knife 

1. Overall scheme design, three drill bits and a reamer, the cooperation between each tool is more reasonable, which can greatly improve the tool life;
2. Adopt advanced coating technology, and surface polishing treatment after coating, higher surface finish, improve chip removal ability, inhibit the generation of built-up edge, thereby enhancing tool life;
3. The self-developed hard alloy bar and the enlarged internal cooling hole are adopted to improve the wear resistance and the tool life is longer;
4. Larger internal cooling holes, which increase the flow of coolant, make chip removal more smooth, reduce scratches on the inner hole surface, and reduce scrap.
5. Adequate coolant flow, which improves cooling and lubrication, enhances the surface quality of the bore and extends tool life;

Here are photos of the cutting tool and the machining parameters, as well as a comparison with the competition:

8.27 Pilot Drill: Pilot hole depth 14mm

8.25 Deep hole drill: Drill depth 36mm

7.6 Deep hole drilling: drilling holes with a depth of 18mm

7.6 Deep hole drilling: drilling holes with a depth of 18mm

 Conclusion 

The drill bit life is 237.5% of the competition, and the reamer life is 240% of the competition, solving the problem of the customer's original reamer roughness unqualified.
Using Pu Precision's comprehensive solution for hole machining of shaft parts, it can greatly improve your production efficiency and reduce processing costs.