Gear processing method five: gear shaving processing

Gear processing method XNUMX: The relevant instructions for gear shaving are as follows, for reference, and more instructions can be consulted by EP technicians for free.

Gear shaving is a generative method, and it and the gear grinding process aregearFor finishing, gear shaving can improve tooth profile accuracy and tooth orientation accuracy, and reduce tooth surface roughness, which needs to be performed on a special gear shaving machine.

XNUMX. Gear shaving processing:

1. The axis of the gear shaving cutter and the axis of the workpiece include a β angle, so that the gear shaving cutter can be correctly meshed with the workpiece.

2. During gear shaving, the gear shaving cutter drives the workpiece to rotate.

3. The speed of the contact point A between the gear shaving cutter and the workpiece can be decomposed into tangential speed and shaving speed.

4. The tangential speed drives the workpiece to rotate, and the shaving speed causes the tooth flanks of the gear to slide along the tooth flanks of the shaving cutter, cutting extremely thin chips from the tooth surface of the workpiece.

5. In the process of shaving, the shaving cutter sometimes rotates forward and sometimes reverses, which can shave both sides of the workpiece.

XNUMX. The characteristics of gear shaving:

1. The gear shaving cutter drives the workpiece to rotate, and the two form a helical gear with no backlash for free meshing movement.Gear shaving has a high productivity. It usually only takes 2 to 4 minutes to process a medium-sized gear. Compared with gear grinding, the productivity can be increased by more than 10 times.

2. Gear shaving belongs to free meshing generative processing. The machine tool has no generative motion transmission chain, so the machine tool structure is simple and the machine tool adjustment is easy.It is different from inserting and hobbing.

3. When the gear hardness before shaving is in the range of 22-32HRC, the shaving cutter has the best ability to correct errors. If the gear material is uneven, contains too much impurities or is too tough, it will cause the shaving cutter to slide or gnaw.

4. Gear shaving is a finishing method of tooth profile, so the gear before shaving should have a higher accuracy. Usually the accuracy after shaving can only be improved by one level than before.

5. The size of the shaving allowance has a great influence on the quality and productivity of shaving.

6. When shaving teeth, in order to reduce the load of the tooth tip of the shaving cutter and avoid breaking the tip of the blade, dig out a piece at the tooth heel before shaving.

7. It is also very important to reasonably determine the cutting amount and correct operation.

8、剃齿加工精度一般为6～7级，表面粗糙度Ra为0.8～0.4μm，用于未淬火齿轮的精加工。

XNUMX. The movement of gear shaving:

1. Cutting movement: the relative sliding of the tool and the workpiece, the relative sliding speed is the cutting speed.

2. Longitudinal feed speed (two-way).

3. Radial feed movement: In order to ensure the gapless meshing between the tool and the workpiece, and to ensure the working pressure between the tooth surfaces, the worktable should be radially fed after each double stroke.

Fourth, the application of gear shaving:

1. Gear shaving cannot correct the error of gear division.The tooth profile before shaving is mostly processed by gear hobbing.

2. Shaving is widely used for unquenched (HRc35 or less) straight teeth orHelical cylindrical gearThe precision machining can reach level 7~6, and the surface roughness Ra value can reach 08~04μm.

3. The design and manufacture of gear shaving cutters are troublesome, and the price is high, which is suitable for mass production occasions.

The above is the gear shaving related instructions shared by the EP editor today, including but not limited to, if you have more questions, you can consult our technicians for free. EP, 10 years of experience in precision gear processing, with a full range of processing techniques such as gear hobbing, gear shaving, gear milling, gear grinding, gear shaping, etc., imported advanced equipment processing, perfect quality management to ensure high product quality, welcome to buy!