Gear processing

one,Gear processing :

Gear processingThe key lies in the tooth surface processing, the methods include tool cutting and grinding wheel grinding.It is the process of obtaining the specific structure and precision of gears by mechanical methods.According to the processing principle, it can be divided into two categories: the forming method and the forming method.

XNUMX. Types of gear processing products:

1. Cylindrical gear:

According to the tooth shape, it can be divided into straight tooth and helical tooth. According to the position of the tooth, it can be divided into external gear andInternal gear, According to the structure of the parts, it can be divided into disk teeth and shaft teeth.

Cylindrical gearIt is used for the transmission of parallel axis power and motion, such as gearbox speed conversion, engine ignition timing, etc.

2. Gear ring:

For example, the synchronizer gear ring used for the synchronous control of the transmission belongs to the external gear ring, and the gear ring used for the planetary transmission and the sliding gear sleeve used for the transmission connection belong to the internal gear ring.

3. Bevel gear:

According to the tooth profile, it can be divided into straight bevel gears and spiral bevel gears.Among them, spiral bevel gears have formed different international systems according to the difference in tooth profile processing principles and methods, which are usually called standards.

Bevel gears are used for the transmission of power and movement of cross-shafts or cross-shafts, such as differentials and reducers of the rear axle.

4. Special purpose gears:

Such as oil pump gear, speedometer worm, steering rack and so on.

6. Six methods of gear processing:

Gear hobbing, generative gear grinding, forming gear grinding, gear shaping, gear shaving, gear milling, etc.

XNUMX. Gear processing technology:

Automobile gears are generally specialized in mass production. Cylindrical gears and bevel gears are widely representative, and different process combinations are used according to different structures and precision requirements.

The small deformation and process stability control in the gear machining process are relatively complicated.

After forging, most of the blanks should be normalized by isothermal, in order to obtain good processing performance and uniform metallographic structure with tendency to deform;

For low-speed cylindrical gears with low precision requirements, the gear can be shaving before the heat and no longer processed after the heat. The application of the radial shaving method expands the application range of gear shaving;

Cylindrical gear thermal post-processing has two methods: honing and grinding. The cost of honing is low, but the ability of tooth profile correction is weak, and the grinding precision is high and the cost is high;

The use of tooth tip trimming along the tooth height direction and drum-shaped tooth trimming along the tooth length direction can significantly reduce gear meshing noise and improve transmission performance.

Straight bevel gears are mainly used in differentials. Due to low speed and relatively low precision requirements, precision forging tooth profile is an important development direction.

In the calculation of spiral bevel gear processing and machine tool adjustment, the previous very complicated and time-consuming manual operations have been replaced by modern special software and computer programs. The introduction of finite element analysis makes the design of process parameters more reliable and convenient.

Spiral bevel gears have two types of thermal post-processing: grinding and grinding. Due to the high cost, low efficiency and limitations of grinding, the grinding is currently mostly used. The geometrical correction ability of the grinding is very weak, so the spiral bevel gears Driven gears mostly use the carburizing press quenching process.

The development of gear materials and heat treatment technology is a challenging subject for deformation control in gear processing.

Examples of gear processing technology and production process:

齿轮按规格尺寸煅料-精车齿轮（C45/42Cr需调质内外孔形状倒角/圆角）-齿轮滚齿加工-齿轮拉键/打孔/攻丝/挤棱去毛刺-16MnCr整体渗碳，C45/42Cr高频淬火（50~62HRC）-磨内孔/磨外圆/磨端面/磨平面-高精度硬刮磨削-高精度磨削-齿轮硬度检测-同心度/齿形等精度检测-尺寸/公差/平行/垂直度等检测-齿轮刻标/清洗上油/装箱发货

XNUMX. Gear processing tools:

Gear processing has a dedicated and complex tool system, and different tools need to be selected and designed according to different gear products and processing methods.

Such as hobs, shaving cutters, gear shaper cutters for cylindrical gear processing, various milling cutters for spiral bevel gear processing, and circular broaches for straight bevel gears.

The sharpening of gear cutters generally needs to be done by special machine tools, such as hob relieving grinders, multi-function shaving cutter grinders, spiral bevel gear cutter grinders, etc.

XNUMX. Gear processing machine tools:

Automobile gear processing machine tools can be divided into two categories: cylindrical gear and bevel gear processing machine tools, with different levels of accuracy and scope of application.

1. Cylindrical gear processing machine tools can be divided into gear hobbing, gear shaping, gear shaving, gear honing, gear grinding, gear extrusion, chamfering, etc. according to the technological methods.

2. Bevel gear processing machine tools can be divided into milling, gear shaping, gear pulling, gear grinding, gear grinding, chamfering, rolling inspection, quenching machine tools, etc. according to the technological method.

Ever-Power Transmission-is a brand with 10 years of customized precision gear processing, complete product models and specifications.Regarding gear processing, if you have any unclear points or related requirements, you can ask EP technicians for solutions.