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Working principle of slow wire processing

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 Slow wire walking, also called low-speed wire walking, is a kind of CNC machining machine tool that uses continuously moving fine metal wire as an electrode to pulse spark discharge on the workpiece to generate a high temperature of over 6000 degrees, ablate metal and cut into a workpiece. The principle of wire processing is the phenomenon that there is a gap between the wire electrode and the workpiece, and the metal is removed by continuous discharge. Since the slow-moving wire cutting machine adopts the method of wire electrode continuous feeding, that is, the wire electrode is processed during the movement, so even if the wire electrode is worn out, it can be continuously supplemented, so it can improve the machining accuracy of the parts and slow the wire. The surface roughness of the workpiece processed by the cutting machine can usually reach Ra=0.8μm and above, and the roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much better t
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Hydrostatic guideway of CNC machining lathe

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The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form of numbers and lette

Introduction of KOVAR parts

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KOVAR parts are commonly used as metal casing materials in the electronic packaging industry. Because they have a linear expansion coefficient close to that of molybdenum group glass, and can produce less sealing stress during the sealing (melting) process with molybdenum group glass, so To obtain good air-tightness, in order to make the metal tube and shell to achieve air-tight sealing, in the entire sealing process, the annealing process undoubtedly plays an important role as a link between the previous and the next. The internal stress generated during KOVAR  machining also prepares the material structure for the implementation of the subsequent process-the sealing process of the metal parts. The main purpose of annealing Kovar shell before sealing is to: (1) Eliminate machining stress. When Kovar undergoes plastic machining deformation during cold working, about 10% to 15% of the applied energy is converted into internal energy, which is commonly referred to as internal stress,
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Signal value acquisition method in brake valve test bench

cncmachining November 25, 2021

The pneumatic brake valve test bench is composed of a stepping motor, a reducer, a force sensor, an angle sensor, a displacement sensor, a through-beam sensor, a platform and a fixture. The electrical system is composed of a control system and an acquisition system. The control system mainly adopts PCL-720+ digital I/O card and PCI-1721 analog output card, and the acquisition system adopts PCI-1747U data acquisition card.

The PCI-1721 analog output card provides a high-speed PCI bus card with 4 analog output channels. It has a 5MHz* digital update rate and automatic calibration function. Each analog output channel has a 12-bit double-buffer DAC with internal/ Real-time waveform output function of external trigger, with flexible input type and range setting, etc.

The analog output signal provided by the PCI-1721 analog output card is used to control the stepper motor, and then the pedal force is controlled through the reducer. The panel is equipped with corresponding display instruments and control switches. The PCL-720+ digital I/O card controls the opening and closing of the solenoid valve and the control of other protection units. At the same time, the PCI-1721 analog output card is also used to control the size of the solenoid proportional valve and control the pressure applied by the test sample. size.

The acquisition system mainly uses the analog input signal provided by the PCI-1747U data acquisition card to collect the values ​​of displacement sensors, angle sensors, force sensors, and pressure sensors.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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