[CCMT2016] Current status and development trend of honing processing

This article briefly describes the development trends of honing exhibits and honing machines exhibited at CCMT2016.

First, the status honing processing
The honing process originated in the early 20th century and was applied to the processing of cylinders for automobiles and internal combustion engines with good results. In developed countries, research on honing technology mainly focuses on the development of new honing technology, such as the two-way double-feed flat-top honing developed by German Lager, the newly developed laser honing by German Green, and the newly developed by American Shanneng. Brush honing technology. The surface roughness testing instrument is mainly developed to adapt to the development of precision honing technology. The famous detection systems include British Taylor, German Hommel, German Marl, and Japanese Seiko. The development of these processes and detection technologies has greatly improved the engine running performance and prolonged the service life of the engine. With the continuous development of honing technology, the control system is also controlled by traditional electromechanical hydraulic control to digital stroke, and even to the direction of CNC.
At present, domestic engine cylinder sleeves, cylinder blocks and engineering machinery hydraulic system manufacturing generally use honing technology, but the level of honing is relatively low, and the research on honing process parameters is loose. Foreign honing equipment has advanced cooling and filtration technology, advanced temperature control technology, and advanced fixture technology. In comparison, there is still a big gap in China's honing equipment.
The rapid development of foreign honing technology poses a challenge to the use of honing machine manufacturing and honing processes in China. According to statistics, the number of honing machines introduced in China has reached hundreds of units in recent years, and the high-end market is basically occupied by foreign honing machine manufacturers. The level of honing machine technology produced by professional manufacturers of domestic honing machines has a certain gap with foreign products.

Second, honing machine exhibits overview
There are not many exhibits in this exhibition. The following is only a brief introduction of related exhibits: This machine is a two-spindle mobile CNC honing machine for machining four or six cylinder diesel engine bodies. The whole machine adopts modular design, which can be applied to precision machining of various automobile and motorcycle cylinder blocks, connecting rods, automobile brake drums, cylinder sleeve holes, hydraulic valve body holes, piston ring holes and other types of through holes and blind holes. It can be used as a stand-alone machine or integrated into an automatic production line. It is an ideal equipment for honing processing.
The original innovation of the machine tool movement mode, the core technology, key components independent research and development, the main functions and performance of the machine tool, the main honing indicators, etc., surpass the domestically produced similar machine tools, and reached the technical level of imported similar products. It is an international standard for independent research and development and manufacturing in China. High-end CNC honing machine. The machine is characterized by high precision, high efficiency and high performance. The time required for any machining cycle can be preset by a timer installed on the control panel. The ideal spindle speed for each honing operation can be set via the spindle drive. Its electronic brake eliminates the scratching of the hole wall at the end of the honing. After the honing, the digital control system automatically supports the honing head to be removed from the part for easy measurement and replacement of the whetstone. A wide variety of workpieces can be precisely positioned and fixed with adjustment fixtures. The digital control system can display the oilstone feed rate and the most suitable cutting pressure, honing time, reciprocating times, reciprocating position, etc. on the touch screen. It can automatically adjust the reciprocating position, automatically correct the hole shape, and ensure the accuracy of the hole to achieve the hole. The best control of the shape. The main feature of the cooling system is 5-stage filtration, namely, 1-stage magnetic filtration, 2-stage network plus deposition filtration, and 2-stage filter filtration. The HM series CNC honing machine is a CNC honing machine that meets the needs of users who want high-precision boring and boring on one machine. This not only saves time for secondary clamping, greatly improves processing efficiency, and eliminates accumulation errors between processes, thereby achieving high efficiency and high precision machining. After more than 20 years of market application, Ikei has developed various honing processing functions and software from small diameter to large diameter for this series of machine tools. This series of machine tools is widely used in RV reducers, hydraulic pump valves and engine industries.
The HM series machine features: CNC machining based on NC expansion function (U-axis); multi-diameter honing finishing based on tool exchange function (ATC); high-precision honing finishing based on boring and milling (bottom hole) ; Provincial equipment, provincial clamping, shortened production line; use plug size, airtight size, stable control of multiple detection; rich automation functions, honing software. The machine is a double-shaft double-station vertical honing machine. The main technical specifications are: boring diameter φ4-50mm, stroke length 350mm, maximum reciprocating speed 25m/min adjustable, stroke control mode is servo mode / electro-hydraulic servo, spindle The motor is frequency conversion/servo, the expansion method of the honing stick is quantitative constant pressure, the minimum feed amount of the honing stick is 0.1μm, the spindle motor power is 2.2kW/4kW, and the spindle speed range is 80-1500r/min stepless speed change.

Third, the development trend of honing processing
In the future, CNC honing machine tools will inevitably develop in the direction of high speed, high precision, flexibility, functional integration, intelligence and high reliability. In addition, CNC honing machines will also be developed in the direction of networking, drive parallelization and standardization.
As a complex production tool, the most fundamental tool is the machining process and the mainframe structure layout. Various new processes, new materials, new components, new tools, new control systems, etc. will also be applied to the honing machine. The machining accuracy and efficiency of the machine tool will be higher and the processing range will be wider. (Zhang Xiaoming Ningxia Yinchuan Dahe CNC Machine Tool Co., Ltd.)

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