Development Trend of Gear Processing Technology and Equipment

Understanding the development trend of the industry can provide equipment manufacturers with products more suitable for the development trend of production. For users, enterprises can plan equipment procurement ahead of time and provide forward-looking vision for enterprise development. The content of Metal Processing Wechat is to make gold powder grow taller!

In order to meet the requirements of manufacturing accuracy, production efficiency, cleaner production and quality improvement in gear processing industry, the following development trends have emerged in gear making machine tools and technology.

The machine tool has the following advantages by CNC control of the moving axes and linkage between parts of the axes.

1) Increase the function of machine tools, such as Hobbing Small Taper and drum gear become very simple.

2) The transmission chain is shortened, and the positioning accuracy and repetitive positioning accuracy of each axis can be improved by NC compensation after semi-closed or full-closed-loop control, thus the machining accuracy and Cp value of the machine tool are improved, and the reliability of the machine tool is increased.

3) When changing varieties, the time of calculating and changing gear-splitting and differential gear-changing, feeding and spindle shifting is omitted, and the time of changing inclined guide rail is also omitted, thus the auxiliary processing time is reduced and the flexibility of machine tool is increased.

4) As the mechanical structure becomes simpler, the design can be more conducive to improving the rigidity of the machine tool and reducing the thermal deformation to the minimum.

5) There is no mechanical connection between the axles, and the structural design becomes typical, which is more conducive to the implementation of modular design and manufacturing

2. High Speed and High Efficiency

The high speed of gear processing machine tools such as hobbing machine, gear shaping machine and gear grinding machine mainly refers to that the machine tool has high spindle speed and high table speed, which are the main indicators of improving cutting efficiency. The hob spindle speed of traditional mechanical hobbing machine is usually up to 500 r/min, and the work table speed is up to 32 r/min. Metal processing Wechat, the content is good, worthy of attention. With the improvement of the performance of gear processing tools, the high-speed and high-efficiency cutting of gear processing machine tools has been rapidly developed and matured. The cutting speed of gear hobbing has been developed from 100 m/min to 500-600 m/min, and the cutting feed speed has been developed from 3-4 mm/r to 20 mm/r, which makes the maximum speed of hobbing machine spindle up to 5500 r/min, the maximum speed of worktable up to 800 r/min, and the moving speed of machine parts up to 10 m./ Min; the high-power spindle system enables the machine tool to be grinded by grinding wheels with larger diameter and length, which is conducive to increasing the service life of the grinding wheel, and also conducive to the operator to select the optimal grinding parameters to complete grinding.

3. High Precision

Because of the adoption of high-precision, high-rigidity linear guideway with preload, ball screw, rolling bearing, motorized spindle, moment motor and numerical control technology, the accuracy of gear processing machine tool under high-speed processing conditions is guaranteed and improved. The accuracy of motorized spindle is generally 0.002 mm in radial oscillation and 0.001 mm in axial direction; the positioning accuracy of toroidal torque servo motor is 0.5"and repetitive positioning accuracy is 0.01"; the positioning accuracy of linear motion axis is less than 0.008 mm and repetitive positioning accuracy is less than 0.005 mm. Although the hobbing and shaping are rough machined, they can still achieve DIN6-7 level accuracy under the condition of high speed cutting, and obtain high precision for the subsequent finishing process. Degree provides assurance. With the improvement of the production efficiency of gear grinding machine, the reduction of the cost of single gear grinding and the continuous pursuit of improving the accuracy of automobile gears, the market demand for gear grinding machine is growing. At the same time, with the development of numerical control technology, the extension of functions between various machine tools is easier to achieve. Therefore, under the fierce market competition pressure, the world's major manufacturers of gear machine tools have joined in the production of gear finishing machine tools represented by grinding machines. The development of this trend will make the rolling-grinding process more and more used in automobile gear processing in the future.

4. Functional Composition

Functional compound machine tool refers to a machine tool or workpiece in a single clamp, can complete multi-process processing, thereby improving the processing efficiency and even accuracy of the workpiece.

5. Green Environmental Protection

The application of cutting fluid in the cutting process can improve the tool life, improve the surface quality and facilitate the discharge of cutting heat without causing thermal deformation of the machine tool. However, the splash of cutting fluid and the oil mist formed during the high-speed cutting process are particularly harmful to the ecological environment, especially the health of operators. Therefore, the processing area is usually closed with a shield, and an oil mist separator is installed, so that only the oil-free mist is discharged, while the cutting oil is re-flowed back to the machine tool for recycling. But this can not fundamentally solve the problem of environmental protection, because the replacement and discharge of deteriorating cutting fluid will seriously pollute the environment. The cost of cutting fluid and additional devices of cutting fluid consumed in wet gear processing accounts for about 20% of the processing cost. High-speed dry cutting can improve the processing efficiency by more than 2-3 times, and the service life of the tool is 2-5 times that of wet cutting. Therefore, dry cutting reduces. The processing cost of single gear is reduced. Metal processing Wechat, the content is good, worthy of attention. High-speed dry cutting can not only reduce the consumption of cutting fluid and cooling equipment, but also avoid environmental pollution. It can also improve production efficiency and reduce the manufacturing cost of single gear.

6. Intelligence

The combination of digital control technology, sensor technology, information technology and network control technology makes the intelligent level of NC gear machine tool higher. Gear processing machine tools should realize error compensation, temperature compensation, automatic balance, anti-collision function, overload protection, automatic identification of workpiece, whether the workpiece is correct, whether the workpiece has been processed, gear meshing, machining allowance distribution, tool wear, on-line precision detection, automatic dressing grinding wheel, zero programming interface, multi-functional processing software, cutting process expert system, machine. The functions of automatic recognition, remote control and remote diagnosis of workpiece moving between machine tools are based on Intelligent technology, which is the basis of improving reliability, safety, stability, complex parts processing, precision machining and unmanned production of gear machine tools, but it will continue to improve and improve.