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> Industry Trends Date of publication:2014-03-31
Domestic market demand for high-end CNC machine tools increased, frequent new CNC machine tools . CNC punch press with CNC control system that can arbitrarily set the slider movement pattern and speed of processing methods as needed . Based on changes in the market, is expected to develop the future direction of China-made CNC machine tools will have the following models.
1 , screw type CNC punch
AC servo working machine using a servo motor driven by the screw of the slider , the forming position of the lower dead point position read by the data providing apparatus is set to the position control means controls . Therefore , the mechanical thermal expansion and elastic deformation does not affect the accuracy of the product , to adjust the most suitable manner and slide motion units to control the position of tiny lower dead point . It is suitable for high precision and high performance of the non-cutting shaping of the screw press with hydraulic servo motor torque control is performed , and the accumulator in the form of the bottom dead point position can be controlled to the micron level, energy saving and environmental protection requirements of the aircraft .
2 , crank servo press
Crank -style punch combined with AC servo motor CNC punch . This punch is used to replace the original punch servo motor brake and clutch flywheel . This punch has a sport mode can be set slider servo presses characteristics, while torque characteristics shown in Figure 3 with ordinary mechanical punch . However, their work does not reduce the energy in the low speed region .
3 , multi-action forming presses
Double action is a powerful tool for shaping without cutting forming. Occlusion forging Cold forging is an example , by controlling the plurality of punches , action and time diagram of the die to achieve the purpose of controlling the flow of the plastic material . Products and precision can be improved moldability , the number of steps can be shortened even .
Double action forming roughly be divided into two categories: attention punch versatility of using double acting double acting mold forming ; many varieties of mold assembly and disassembly is easy to use multi-action press forming . Recently , not only in the same forging , and forming the sheet metal and increase the variety and capacity of the compound forming the forging , press not only requires more operational performance , must have a high versatility.
4 , closed-die forging presses
Star wheel coupling and cross section shape is the widespread use of closed die forging and general forging punch. Its mold structure with occlusive function and coordination functions. Other pipes can save time occlusion forging press mold assembly can be divided into two categories: those functions all in the punch in and punch down tanks in the two forms of organization and coordination in the mold base.
5 , plate forging presses
With the popularity of sheet metal forging forming , require forging presses capable of deep drawing or shorten the project number , thus requiring the slider and the table must bring cylinder. Almost all of the original occlusion forged high pressure capability of the action , in addition to the requirements of forging and sheet metal worker wears atmospheric adaptation actions , but also with a sequence of actions required , self-locking functions.
6 , the gear forming presses
Helical gear forming double acting hydraulic presses . This punch total sliding drive , the slider 2 , the table 2 , a total of five drivers all sources combined with a hydraulic drive unit. The early stages of forming mandrel and the inner pressure of forging the same way , blocking the punch die insert tooth space , material carried from start to flow underneath the early forming. In this state , the core increased , the center of the mandrel material from coarse fine diameter . In this case the inner diameter portion has a new piece of space, you can create new plastic flow , so the more pressure the material can be filled tooth apex site. Processing out of the product with this method , processing pressure only 1300Mpa, collapsed corner tooth portion and burrs minimal. The use of the material forming the complex dynamic flow control forming out of gear up JIS3 ~ 4 , which is very close to the non- cutting forming high added value.
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