China high-speed precision CNC drilling micro-hole 0.1mm~0..03
The first prototype was completed in October 2012, and the micro-holes with a diameter of less than 0.1 mm can be processed by the test prototype. The technical problem of high-precision micro-holes with a hole diameter of less than 0.2 mm cannot be solved in China.
In July 2013, the research and development and trial production of domestic micro drills were completed, and domestically produced micro drills with a minimum diameter of 0.03 mm were developed and prototyped; After processing, the micro drill products developed by our company can completely replace imported products in terms of product accuracy and service life.
In 2014, the company began research and development of linear motor driven micro-drilling machine tools. In November of the same year, the first domestically produced linear motor driven high-speed precision CNC micro-drilling machine was successfully produced.
In July 2015, the company completed the R&D, design and manufacture of the first precision micro-drilling machine for AC servo and linear motor hybrid drive.
In September 2016, the company completed the R&D, design and manufacture of the first four-axis, five-axis controlled precision CNC micro-drilling machine tool and delivered it to users.
Since 2017, the company has been committed to the processing of precision micro-hole parts for customers. Efforts to accumulate manufacturing processes and technical parameters to prepare for the development of the next generation of updated products.
In April 2017, we began designing, developing, and manufacturing precision CNC micro deep hole drilling equipment, and completed the manufacturing of the equipment in December 2017.
With the development of modern industry and technology, more and more products are developing towards micro and precision, making the research of micro-hole processing technology more and more extensive. Regarding the specification of micropores, the apertures below φ3 mm are roughly classified into the following six grades in foreign countries:
Small hole 1.5~3mm;
Secondary apertures 0.5 ~ 1.5mm;
Ultra small hole 0.1~0.5mm;
Micropores 0.01 to 0.1 mm;
Secondary micropores 0.001 ~ 0.012mm;
Ultramicropores of 0.001 mm or less.
Application range of micropores
Micro-pore structure is widely used in oil pump nozzles, aerospace manufacturing, watch fixtures, Instrument gem bearing, Chemical fiber spinnerets, automotive, electronic devices, circuit board processing, computer inkjet printheads, Electron microscopy gratings, integrated circuits, medical devices, precision water treatment, Industrial water treatment, optical instruments, precision metering flow equipment manufacturing, Precision handling robot manufacturing, various spray gun nozzles, Precision microelectronics mold manufacturing, military precision parts manufacturing, market demand is very large. No one has been able to accurately calculate specific demand data. It is conservatively estimated that the demand for micropores in the world will not be less than the order of 100 billion.
The main process and advantages and disadvantages of micro-hole processing
At present, the main methods of processing micro-holes are: machining, EDM, laser processing and electrolytic processing. Machined hole: It is divided into punching hole and drilling hole. There are many ways to process micropores, but each has its own advantages and disadvantages.
First, the tool must be harder than the material being processed to achieve machining. Secondly due to the limitations of tool materials and processing technology. Traditional tool processing does not allow processing of special materials and superhard materials.
Stamping can also be done with micro-holes. However, due to the limitations of stamping equipment, the limitations of punch materials, and the limitations of the punch manufacturing process. Although the micropores can be processed efficiently, the precision and smoothness of the holes are still greatly limited, especially in the processing of precision micro-holes, the application of the punching holes is less.
The hardness of the material that can be processed exceeds that of the electrode, and a large aspect ratio (200:1) can be achieved. This is the biggest advantage of the electromachining microporous machine, but there are certain disadvantages in electromachining. The first is the accuracy of the machined hole. The middle part of the low hole will have a big belly phenomenon, and the bell mouth will appear at the exit portion of the hole. At the same time, the processing efficiency is also relatively low, and the surface processing of the hole will produce a remelted layer, which greatly affects the smoothness of the inner wall of the hole. This greatly limits the application range of spark micro-hole machining, especially in the high-precision micro-hole industry. In addition, there is a drawback in the electromachining of micropores, that is, the fabrication technology and cost of the microporous electrode are also high, and the processing efficiency is also relatively low.
It has high efficiency, no material limitation, no pollution, and the processing aperture can reach 0.02mm. But there are also certain technical flaws. First of all, it is not possible to process large deep bore holes due to the power limitation of the light source. Generally, the power of the light source is less than 1.5KW, and there is nothing to do with deep hole processing. Secondly, the laser machining is always laser spot machining, which leads to the existence of remelting layer and processing stripe on the inner wall of the processing hole, resulting in low surface finish, which cannot meet the requirements of most high-end precision hole processing.
The advantage is that the efficiency is high and the finish is good, but there are also drawbacks that are the outdated technology of the former Soviet Union in the 1960s. With high pollution and low precision, the machining accuracy can only be guaranteed at ±0.1mm, which is not suitable for large-area promotion, and is also limited by national policies. In recent years, it has gradually withdrawn from the precision micropore manufacturing industry.
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