A complete set of tutorials for beginners in CNC gear hobbing machines

Writer： admin Time：2024-05-16 13:52:12 Browse：48℃

For beginners operating CNC gear hobbing machines, they need to follow the following steps and precautions when getting started

1. Inspection before debugging. Ensure that the positioning end face runout of the tool holder, tool boss, core shaft, and fixture meet the machining requirements. Check the end face runout of the fixture (between 0.006 and 0.013)

Radial runout of the spindle and upper and lower tip cone surfaces (both less than 0.01), end face and radial runout of the hob cutter head (all less than 0.01), and radial runout of the hob shaft table (less than 0.01).

2. Adjust the intersection angle between the tool holder and the tool shaft. Adjust the intersection angle between the tool holder and the tool shaft according to the needs of processing the product.

3. Calculation and installation of hanging wheels. Calculate the gear change gears, differential change gears, and tool change gears based on product parameters, and correctly install and lock them.

4. Preparation before starting up. Ensure that the rolling cutter and workpiece are tightly pressed and locked, and that the rolling cutter is in a safe position.

5. Operation after startup. Lock the initial feed position block of the roller cutter axially, manually feed radially, and perform the initial feed trial cutting after the roller cutter contacts the outer diameter of the workpiece.

6. Use of rolling cutters. Note that the tooth profile of the hob edge is incomplete. When starting machining, start from the first tooth excluding the edge teeth and gradually move to the other end.

7. Monitoring during processing. Pay attention to the operation of the machine at all times, and inspect the products in a timely manner. If any problems are found, they should be corrected in a timely manner.

8. Safety precautions. Protective equipment must be worn during operation to avoid collision between the rolling cutter and the workpiece, and to avoid injury caused by the breakage of the rolling cutter.

9. Other preparatory work. Ensure that the height between the bottom surface of the blank and the workbench meets the machine tool regulations, and that the diameter of the wheel blank washer is less than 3 millimeters of the root diameter of the gear being processed,

Clean the tool holder, tool holder bracket, tool holder washer, and tool hole clamp, and insert appropriate keys when installing the milling cutter.

10. Operations under special circumstances. When moving the angle of the tool holder, pay attention to sliding down. When milling the helical gear, the workpiece should be firmly clamped to avoid collision with the tool holder,

Dismantle the cutting screw and lift the knife holder, the knife must be retracted. When driving at high speed, the milling cutter should not collide with the workpiece, and the distance when exiting should not be too long.

11. Compliance with technical specifications. The modulus, diameter, etc. of the gear being processed shall not exceed the technical specifications of the machine tool. When hanging the wheel, the power should be cut off.

Following these steps and precautions can help beginners operate CNC gear hobbing machines safely and effectively.