Automatic Cnc Milling Machine

Dongguan Jide Precision Machinery Technology Co., Ltd. is one of the most credible manufacturers and suppliers of automatic cnc milling machine in China. If you're going to wholesale high quality automatic cnc milling machine made in China, welcome to get quotation and free sample from our factory. All customized products are with high quality and competitive price.

Machine parameter 

Automatic cnc milling machine quality control 

Automatic cnc milling machine need Manual fine scraping, the average grinding point per 25M×25M should be 20~25 points to ensure the accuracy of the machine tool
The parallelism of the guide rail screw rod is tested by a dial gauge, and the accuracy is within 1 wire

It is tested by the British Renishaw ball tester to ensure the accuracy of the machine tool
Use Renishaw laser detector to calibrate the accuracy of machine tools to ensure that each piece of equipment meets the standard before leaving the factory

Machine in details 

MITSUBISHI /FANUC for use 

high rigidity spindle 

optional 4 axis for choice 

The processing concept of μm-level mold manufacturing by automatic cnc milling machine

In terms of the precision of the mold, the high-speed terminal mold should be considered the most precise here. Stamping materials are generally 0.08~0.2 mm stainless steel and aluminum, the punching gap is as small as 0.008 mm, and the minimum width of the punching hole is 0.25 mm. The punch looks flimsy. How to punch such a small hole? How can such a small blanking gap ensure the manufacturing accuracy of the mold? It's unimaginable if you don't see it with your own eyes.

Turn over the drawings, understand the mold structure, design and manufacturing tolerances and its special manufacturing process, it is not difficult for us to feel the pulse of this mold.

All the punching parts are from top to bottom into blocks and punches, and the knife edge is made of tungsten steel. Upper template, stripper plate, lower template’s entry hole, fixed pin hole JG grinding, sliding fit clearance c+0.005~0.010 mm, non-sliding fit c+0.003 mm, processing accuracy +/-0.002 mm; main structure guide The ball sleeve is matched with the precision guide column, and the small hole punching structure adopts a partial structure separated from the upper mold, and is locked on the lower template with a contour sleeve to compensate for the precision error of the stamping equipment; the guide part of the partial structure is a precision graphite self-lubricating inner guide The column, the stripper plate and the inner guide sleeve of the lower template are filled with glue to make up for the processing error of the guide parts and improve the guiding accuracy to ensure the position accuracy of the template during the stamping process; the stamping stroke as small as possible can make the punching head The length should be as short as possible, and proper punch reinforcement can improve the strength of the punch. This can fully reflect the design concept of mold designers tending to high precision, and ensure the high quality and high requirements of the mold as much as possible.

Modern processing equipment and high-precision processing technology allow these design concepts to be fully utilized. After the template heat treatment, it undergoes cryogenic aging treatment to eliminate internal stress, prevent template deformation, and ensure the processing stability of the template. Plane grinding ensures the flatness of the template. The parallelism is 0.005 mm. The precision of EDM is controlled at ±0.002mm. The accuracy is controlled at ±0.0015mm.

For high-precision machining, the temperature problem must not be ignored, because temperature difference is the enemy of precision. Due to the thermal expansion and contraction of the material, the linear expansion of the steel will produce a change of 12μm per meter of length when the temperature changes by 1°C. This is a fact that is constant for every machine in every corner of the world. If we don't care about the important issue of temperature, how can we discuss accuracy? The control of workshop temperature is very important, because the accuracy of processed workpiece has a lot to do with it. The temperature of precision machining is generally controlled at a constant 20°C, and the temperature fluctuation is required to be less than 0.5°C/hour, and the air-conditioning system maintains a constant temperature difference of ±1°C throughout the day.

I admire the sophistication of the mold assembly engineer. First carefully understand the mold drawing, familiarize yourself with product information, analyze the mold structure, and understand the design intent; check the parts, chamfer, polish, and engrave the lettering to make marks meticulously; Use a special positioning tool to ensure its verticality; the actual thickness of the template is measured, and the difference between the four-point measurements is within 0.005 mm; Projectors are used for self-inspection of products during mold adjustment, and the accuracy is 0.003mm when molds are repaired and inserted into blocks; without the concept of precision, it is impossible to develop high-quality, and it is impossible to install high-precision molds.

Mold development is mainly divided into three stages: mold design; mold processing; mold assembly, mold testing and repair. All three are indispensable. A set of high-precision molds must have precise design, precise processing, and precise assembly.

The designer gives the mold the soul, the processor casts the mold body, and the assembler makes the mold alive. Precise mold concepts run through the entire process of mold manufacturing. Concepts are passed down from top to bottom, and from master to apprentice. Good habits become natural, and it is not difficult to imagine the birth process of each mold boutique. Cultivating the concept of precision molds should become the key content of my study this time, learn other people's good habits, develop my own good habits, establish concepts, and integrate them into work.

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