Gears with gear grinding have the advantages of low transmission noise, high transmission efficiency and long service life. Grinding has been considered as an expensive gear processing tool for aerospace or other high-tech applications. But now, the concept has changed: the efficiency of the gear grinding machine has increased, the performance of the grinding wheel has been better, and the high cost has been greatly reduced. As a result, gear grinding has begun to be applied to gear processing on a large scale, such as the manufacture of automobile and motorcycle gears, and has reached a level of general application. In fact, all first-class automotive gear suppliers have a gear grinding machine in order to remain competitive. The automotive industry will gradually become the largest growth market for hard tooth surface processing in the next two to five years. Because gear grinding removes heat distortion, many gearboxes use grinding gears to better control drive maneuvers and noise. The grinding process has matured and is growing rapidly throughout the gear industry.
Progress of gear grinding machine
Today's gear grinding machines are much more efficient than the same type of machine tools a decade ago. This comes from a series of major improvements:
1 onboard measurement
Many gear grinding machines have become more accurate thanks to the onboard measurement system. Since the on-machine measurement is used, it is not necessary to remove the gear from the workbench and send it to other places for inspection, thereby avoiding secondary installation errors during rework. During processing, the airborne measurement system first analyzes the gears, and then compares the measured parameters with the theoretical design parameters to determine the required correction amount. After the control system collects these correction data, it automatically adjusts the grinding machining state, and then grinds the teeth. And measurement. This cycle is repeated until the required accuracy is reached. The integrated on-board measurement and on-board correction system make modern gear grinding machines more efficient.
In China, the YK75100 shaped grinding wheel grinding machine of Qinchuan Development Co., Ltd., together with the CEP 1000 top-mounted gear measuring system of Chengdu Tool Research Institute, has successfully tried the open-loop in-machine measurement (measurement of measured data) And control still needs to be done manually). However, in terms of the overall level of the country, the precision of processing and measurement needs to be further improved.
2 direct drive motor
In recent years, the use of compact direct drive motors on the grinding wheel spindle and gear workpiece spindles has increased. The direct drive spindle avoids drive chain errors. Therefore, the direct-drive motor is used in the “grinding wheel-grinding gear†cycle, and it is equipped with better grinding wheel and multi-axis linkage control, which can eliminate the high frequency error and harmful vibration of cutting grain, partial geometry, gear noise. .
3 Automation
The term “automation†is increasingly used in gear grinding, especially in process production, including workpiece mounting, tool change, and inventory sorting in synchronization with workpiece processes. Automation eliminates machine idle time and helps reduce waiting time between processes.
4 gear grinding machine software
Windows-based software, like those used in personal computers, is widely used in today's gear grinding machines (such as Windows-based design systems and CNC systems). Previously, it was only possible to draw on paper. Now, the design and correction software package combined with the graphical interface and the algorithm software can make the gear geometry design programmatic and partial manufacturing simulation.
The high-precision closed-loop control between the drive, the ball screw and the position sensor is realized by the application of the software. Many of the new generation of gear grinding machines are equipped with position sensors that are separate from the drive unit for higher accuracy and thermal stability. The absolute displacement sensor and absolute coding technology ensure high-speed transmission of feedback data and stability of machine tool transmission under the premise of high positioning accuracy.
5 machine shape
Today's gear grinding machines are smaller in size and occupy less floor space, which allows manufacturers to better use limited production areas to “create†more available space without having to spend money on building bricks and cement. "On, and used to purchase equipment.
6 new material grinding wheel
Advanced ceramic bond grinding wheels and electroplated cubic boron nitride (CBN) wheels have the same high productivity. Due to the use of new materials in the "mixed particle" type composition and the advancement of the bonding process, the toughness, shape accuracy retention, material removal force and durability of the ceramic bond grinding wheel are improved. These excellent properties are derived from high performance particle structure and increased porosity. At the same time, a good particle structure reduces the grinding pressure and reduces the grinding temperature.
Nowadays, the selection of electroplated CBN grinding wheels and ceramic bond grinding wheels has become difficult due to the use of new cold-grinding ceramic abrasive grains of high-pressure coolant systems. However, the electroplated CBN grinding wheel is simpler to operate than the ceramic bond grinding wheel, has a short installation time and requires less technical ability of the operator, and provides a more feasible low-cost option for the CBN abrasive grain ceramic bond grinding wheel.
Reishauer of the United States tested these ceramic wheels with their "cold grinding" process and concluded that: 1 The latest alumina abrasives and ceramic abrasive wheels produce the same or lesser pressure than CBN abrasive ceramic bond wheels. 2 Contrary to expectations, ceramic wheels are more efficient and durable than CBN wheels. 3 Unlike the electroplated CBN grinding wheel, the ceramic grinding wheel can be rebuilt sharply on the grinding machine, and the electroplated CBN grinding wheel must be sent back to the original factory for grinding.
Ceramic grinding wheels have a high cutting speed (eg 60m / s), so it is suitable for large-scale production of gears. This type of grinding wheel has a longer service life than other grinding wheels (such as alumina grinding wheels). The new grinding wheel technology is used more in the worm grinding wheel of the 200mm and below gears with the largest output.
7 Reduced grinding costs
Nowadays, the cost of grinding teeth has dropped drastically. There are many reasons, such as cost-effective models based on modular design, CNC systems, process production, etc. Even the gear grinding machines that combine all the above advanced technologies are cheaper than the previous models. Much more, mass production has shortened the single-piece production cycle by 50% to 70%, and the cost of consumables (grinding wheels and diamond modifiers) has also dropped significantly.
BRIEF INTRODUCTION
Henan Yuteng Grinding Material Co., Ltd. is located in Kaifeng City, Henan Province. Is a set of production, research and development, service as one of the grinding agent, grinding, polishing products professional company, specializing in the production and sales of coated grinding tools derived ancillary products: flocking sand disc, blade, all kinds of special-shaped grinding disc, sponge grinding block, steel paper disk, ring sand belt, sand ring and automotive polishing products.
Our main products are Velcro Disc,Abrasive Paper,Fiber Disc, Flap Disc ,Abrasive Cloth,Abrasive Belt.
Relying on the advantages of the industrial base, the company has advanced production equipment and strong technical force, complete testing equipment to ensure that the products are sharp, wear-resistant and high strength, and the product quality reaches the advanced level of similar international products.
Our products can be used for all kinds of metal watches and stainless steel, alloy steel, non-alloy steel, non-ferrous metals, titanium alloy and other grinding and wire drawing, polishing and so on; Wood, high-medium fiberboard, flower board, composite board, glass, rubber and other table grinding and polishing. Widely used in automobile, steel, building materials, shipping, aviation, wood, plastic, leather and other industries.
We provide customers with the best surface treatment program, according to the actual needs of customers "tailored" a variety of specifications of sand pan, sand belt, sand carbon and emery cloth ring polishing products.
The company's flexible operating mechanism and all customer-centric concept, we in addition to provide you standardized, serialized products, but also according to your special requirements, for you to manufacture high-quality, personalized non-standard coated with abrasive products.
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Henan Yuteng Abrasives Co.,Ltd. , https://www.henanyutengabrasives.com