CNC

It is usually controlled by electromechanical "target=_blank> mechatronics products such as position, angle and speed, so-called digital equipment, such as CNC machine tools. Its technology involves many fields: (1) mechanical manufacturing technology; (2 ) information processing, processing, transmission technology; (3) automatic control technology; (4) servo drive technology; (5) sensor technology; (6) software technology.

CNC technology and equipment are the enabling technologies and the most basic equipment for the development of emerging high-tech industries and cutting-edge industries. The national defense industry, such as information industry, bio-industry, aviation, and aerospace, widely use numerical control technology to improve manufacturing capacity and level, and improve their adaptability and competitiveness to the market. Industrial developed countries also listed numerical control technology and numerical control equipment as national strategic materials, not only vigorously developing their own numerical control technology and its industry, but also imposing a blockade and restriction policy on China in terms of "high-precision" numerical control key technologies and equipment. Therefore, vigorously developing advanced manufacturing technology with CNC technology as the core has become an important way for the developed countries in the world to accelerate economic development and improve their overall national strength and national status.
"Basic Basics" - What is CNC?
Conventional machining is done by hand-operating ordinary machine tools. When machining, the machine tool is used to shake the metal by hand, and the tool is used to measure the accuracy of the product by means of a caliper. Modern industry has already been operating with computer-controlled digital machine tools. CNC machine tools can automatically process any product and component directly according to the program programmed by the technician. This is what we call "CNC machining." CNC machining is widely used in any field of machining, and it is the development trend of mold processing and an important and necessary technical means.

“CNC” is an abbreviation for Computerized Numerical Control in English.

The CNC machine tool automatically processes the machined parts according to the pre-programmed machining program. We process the machining process of the parts, process parameters, tool trajectory, displacement, cutting parameters (spindle revolutions, feeds, back-feeding, etc.) and auxiliary functions (tool change, spindle forward, reverse, The cutting fluid is turned on and off, and is programmed into a machining program according to the instruction code and program format specified by the CNC machine tool, and then the contents of the program list are recorded on the control medium (such as punched tape, tape, disk, bubble memory). ), and then input into the numerical control device of the CNC machine tool to command the machine tool to machine the parts.

This process from the analysis of the part drawing to the preparation of the control medium is called the preparation of the NC program. The difference between CNC machine tools and ordinary machine tool parts is that the control machine tool automatically processes the parts according to the program, while the ordinary machine tools are operated by people. We only need to change the program to control the machine tool movement to achieve the purpose of processing different parts. Therefore, CNC machine tools are especially suitable for machining small batches with complex shapes and high precision. Because CNC machine tools are used to machine parts according to the program, after the programmer has programmed the program, he inputs it into the numerical control device to direct the machine tool. The input to the program is through the control medium.
The CNC programming CNC machine tool automatically processes the machined parts according to the pre-programmed machining program. We process the machining process of the parts, process parameters, tool trajectory, displacement, cutting parameters (spindle revolutions, feeds, back-feeding, etc.) and auxiliary functions (tool change, spindle forward, reverse, The cutting fluid is turned on and off, and is programmed into a machining program according to the instruction code and program format specified by the CNC machine tool, and then the contents of the program list are recorded on the control medium (such as punched tape, tape, disk, bubble memory). ), and then input into the numerical control device of the CNC machine tool to command the machine tool to machine the parts.

This process from the analysis of the part drawing to the preparation of the control medium is called the preparation of the NC program. The difference between CNC machine tools and ordinary machine tool parts is that the control machine tool automatically processes the parts according to the program, while the ordinary machine tools are operated by people. We only need to change the program to control the machine tool movement to achieve the purpose of processing different parts. Therefore, CNC machine tools are especially suitable for machining small batches and complex shapes with high precision requirements.

Since the CNC machine tool needs to machine the parts according to the program, after the programmer has programmed the program, it is input into the numerical control device to direct the machine tool work. The input to the program is through the control medium.

The development trend of numerical control technology and equipment

The application of numerical control technology not only brought revolutionary changes to the traditional manufacturing industry, but also made the manufacturing industry a symbol of industrialization. With the continuous development of numerical control technology and the expansion of application fields, some important industries such as national defense and automobile, such as national defense and automobile, Development plays an increasingly important role. The digitization of these industries is a major trend in modern development, such as: bridge type three- and five-coordinate high-speed CNC gantry milling machine, gantry mobile five-coordinate AC swing angle CNC gantry milling machine, gantry movement Three-coordinate CNC milling machine, etc.

1. High-speed development and new trends

With the advancement of the performance of the core processor of the numerical control system, the current high-speed machining center feed speed can reach up to 80m/min, and the idle running speed can reach about 100m/min. At present, many automobile factories in the world, including Shanghai General Motors Co., Ltd. of our country, have already replaced the combination machine tools with a production line composed of high-speed machining centers. The CINCINNATI HyperMach machine has a feed rate of up to 60m/min, a fast speed of 100m/min, an acceleration of 2g and a spindle speed of 60,000r/min. It takes only 30 minutes to process a thin-walled aircraft part, while the same part takes 3 hours to process in a general high-speed milling machine and 8 hours in a conventional milling machine. Due to the specialization of the division of labor of various components of the organization, the development of the professional spindle factory has become increasingly popular. In the past, the model used only for the high speed of the automotive industry (models of more than 15,000 rpm) has become an essential mechanical product.

2. New trends in precision machining development

With the advancement of servo control technology and sensor technology, the machine tool can perform precise sub-micron motion under the control of the numerical control system. In terms of machining accuracy, in the past 10 years, the machining accuracy of ordinary CNC machine tools has been increased from 10μm to 5μm, and precision machining centers have been improved from 3 to 5μm to 1 to 1.5μm, and ultra-precision machining accuracy has begun to enter the nanometer class. (0.01 μm).

3. New trends in open development

Due to the standardization and modularization of computer hardware, as well as the modularization of software and the increasing maturity of open technologies, CNC technology has entered an open stage. The open CNC system has better versatility, flexibility, adaptability and expandability. Countries such as the United States, the European Community, and Japan have implemented strategic development plans and conducted research and development of open architecture numerical control system specifications (OMAC, OSACA, OSEC). The world's three largest economies have been almost identical in the short term. The development of scientific plans and technical specifications indicates the advent of a new era of revolution in CNC technology. In 2000, China began to study and formulate the normative framework of China's ONC numerical control system.

4. New trends in compound development

With the complication of the product appearance curve, the mold processing technology must be continuously upgraded, and new requirements for the numerical control system are put forward. Five-axis machining and six-axis machining of machine tools have become increasingly popular, and the compounding of machine tools has become an inevitable development trend. The 5-face machining machine of Nippon Machine Co., Ltd. uses a composite spindle head to realize four vertical plane machining and machining at any angle, so that 5-sided machining and 5-axis machining can be realized on the same machine tool, and inclined surfaces can be realized. Processing of inverted cone holes. DMG of Germany exhibited the DMUVoution series of machining centers, which can be processed in 5 sides and 5 axes in one setup, and can be controlled directly or indirectly by CNC system control or CAD/CAM.

Selection of CNC lathe

CNC lathe, also known as CNC lathe, is a computer numerical control lathe. It is the most widely used CNC machine tool in China, accounting for 25% of the total number of CNC machine tools. CNC machine tool is an electromechanical "target=_blank> mechatronics product integrating mechanical, electrical, hydraulic, pneumatic, microelectronics and information technology. It is high precision, high efficiency, high automation and high in mechanical manufacturing equipment. The working machine with the advantages of flexibility, stable and reliable processing quality. The technical level of CNC machine tools and the percentage of metal cutting machine tool output and total possession are one of the important indicators to measure the national economic development and the overall level of industrial manufacturing. CNC lathe is one of the main varieties of CNC machine tools. It occupies a very important position in CNC machine tools. It has been widely recognized by countries all over the world for decades and has been rapidly developed.

CNC lathes and turning centers are high-precision, high-efficiency automated machine tools. It has a wide range of processing properties, processing linear cylinders, diagonal cylinders, arcs and various threads. It has various compensation functions such as linear interpolation and circular interpolation, and has played a good economic effect in mass production of complex parts. Reasonable selection of CNC lathes should follow the following principles:

I. Selection principle

1. Pre-preparation to determine the process requirements of typical parts, the batch size of the machined parts, the function of the CNC lathe should be prepared in advance. The preconditions for the rational selection of CNC lathes meet the process requirements of typical parts. The process requirements of typical parts are mainly parts. The structural dimensions, processing range and accuracy requirements. The control accuracy of the CNC lathe is selected according to the accuracy requirements, that is, the dimensional accuracy, positioning accuracy and surface roughness of the workpiece. According to reliability, reliability is the guarantee for improving product quality and production efficiency. The reliability of a CNC machine tool means that the machine tool runs stably for a long time without failure when it performs its function under specified conditions. That is, the average time between failures is long, and even if a fault occurs, it can be recovered in a short time and put back into use. Choose machine tools that are well-structured, well-made, and mass-produced. In general, the more users, the higher the reliability of the CNC system.

2. Machine tool accessories and tools purchase machine accessories, spare parts and their supply capacity, tools, is very important for the production of CNC lathes, turning centers. When choosing a machine tool, careful consideration must be given to the fit of the tool and accessories.

3. Pay attention to the identity of the control system. Manufacturers generally choose the same manufacturer's products, at least the same manufacturer's control system should be purchased, which brings great convenience to the maintenance work. Teaching units, because they need students to know more, choose different systems, and equipped with various simulation software is a wise choice.

4. According to the performance price ratio, choose the function, the precision is not idle, not waste, do not choose the function that has nothing to do with your own needs.

5. When the protection of the machine tool is required, the machine tool can be equipped with a fully enclosed or semi-closed guard and an automatic chip removal device. When selecting a CNC lathe and turning center, the above principles should be considered comprehensively.
Training objectives to meet the needs of modern economic construction, moral, intellectual and physical development, solid CNC machining knowledge, strong hands-on ability, can engage in CNC machining and production in the first-line intelligent and skilled operation positions. The talents of CNC equipment operation and management.
Main courses: mechanical drawing, tolerance and technical measurement basis, metal materials and heat treatment, mechanical design basis, engineering mechanics, hydraulic and pneumatic technology, machine tool fixtures, metal cutting principles and tools, mechanical manufacturing technology, electrical and electronic foundation and operational skills, Wrench skill training CNC lathe processing technology, CNC milling machine machining center processing technology, EDM technology, AutoCAD, PRO/E three-dimensional modeling and design, UG three-dimensional design and CNC programming, MASTERCAM three-dimensional design and CNC programming, CNC machine structure and maintenance.
Employment direction is engaged in production management, mechanical product design, CNC programming and processing operations, CNC equipment installation, commissioning and operation, CNC equipment fault diagnosis and maintenance, modification and after-sales service.
SAJ frequency converter in the CNC industry application SAJ CNC inverter main features:

1. Low frequency torque and stable output

2, high performance vector control

3, torque dynamic response is fast, stable speed and high precision

4, slow down parking speed

5, strong anti-interference ability
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

Composite Geomembrane

Product description>>>

Composite geomembrane is an anti-seepage material, which is compounded with geotextile and compound Geomembrane for building construction. It remains the mechanical properties of base fabric and uniformity of film which improve the impermeability. Embossed processing on the film strengthen its friction coefficient, stability and easy for installation. It is mainly used for permeation proof drainage and reinforcement. Composite geomembrane has high tearing resistance, breakage resistance, bursting and other physical and mechanical performance.

 

 Properties and advantages:

Since high molecule material and anti-aging agent are added in its production technology, it can be used in abnormal temperature environment.

Flexibility is good, except of a geotextile`s isolation, drainage, reinforcement, protective functions, it also impermeable.

Production: After far infrared ray heating oven in film one side or both sides, and geotextile and geomembrane pressure together by roller form to composite geomembrane .

Function: Impermeable, reinforcement, protection .

Usage:

Widely used in traffic tunnel, airport, drainage, housing, road construction, river levee, lake dam, sewage dam, waste water dam, channel, liquid storage pool, metro, basement, tunnel, foundation, waste storage, marifarm, seawater farms, freshwater fish farm, fishpond, mine, high way, expressway, motorway, railway, roofing, canal, anti-pollution of waste plant,

environmental protection and many other fields for waterproof protection, reinforcement etc.

 

Unit weight g/m2

400

500

600

700

800

900

1000

Remarks

Project

 

Thickness of Membrane mm

0.25~0.35

 

0.3~0.5

Breaking Strength  KN/m

5

7.5

10.0

12.0

14.0

16.0

18.0

MD and CD

Elongation at Break %                         30~100

CBR Mullen Burst Strength KN≥

1.1

1.5

1.9

2.2

2.5

2.8

3.0

 

Tear Strength KN≥

0.15

0.25

0.32

0.4

0.48

0.56

0.62

MD and CD

Peel Strength N/cm

               6

Vertical Permeability Coefficient cm/s

K×10-11~-13

K=1.0-9.

 

Specification:

One piece of geotextile and one piece of membrane;Weight of base geotextile: 100-1000g/m2;

Thickness of geomembrane: 0.1-1.5mm.

2. Two piece of Geotextiles and one piece of membrane;Weight of base geotextile: 80-600g/m2

Thickness of geomembrane: 0.2-1.5mm.

3. One piece of geotextile and two pieces of membranes;Weight of base geotextile: 100-1000g/m2;

Thickness of geomembrane: 0.1-0.8mm.

4. Multi-layers:Weight of base geotextile: 100-1000g/m2;Thickness of geomembrane: 0.1-0.8mm.

Those size can all be customized.

 

Size of package: 2-6m width, length 50-100m(or at request)


Package: Packed in woven geotextile with strength belt.

 

Packaging Details: :rolls or packed at customer`s request 

(1)1x20ft(5.89m(L) x2.35m(W) x2.39m(H)) : around 18T 

(2)1x40ft (12.03m(L) x2.35m(W) x2.39m(H)) : around 22T 

(3)1x40hc (12.03m(L) x2.35m(W) x2.69m(H)) :around 26T

 

Delivery: 3-20days after deposit

 

FAQ:

1) Q: Do you provide free samples?

A: Yes, sure, we provide free samples for your testing.

2) Q: How long is your delivery time:

A: Goods in stock: within 3 days, Goods out of stock(7 days), Goods need to be customized(10-15 days).

3) Q: How to transport the goods:

A: By shipping, air-flight, express.

4)Do you provide sample? Is it free or extra?

A: Yes, we could offer the sample for free charge and you only pay for freight. If you place an order we can return the freight fee to you.

5)What is your terms of payment?

 A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment.

If you have any question, please feel free to contact us as below:

 

Composite Geomembrane

Composite Geomembrane And Geotextile,Thin Film Composite Geotextile Membrane,Three Cloth A Geomembrane For Landfill,Compound Geomembrane Floating Cover

ZHEJIANG BOYA COMTECH CO.,LTD , https://www.zjbytx.com