The machine tool industry is the carrier of advanced manufacturing technology and the basic production means of equipment manufacturing. It is the foundation and lifeline of national economic and national defense construction and belongs to the national strategic industry. The CNC machine tool is the core product of the machine tool industry. It is a technology-intensive product integrating light, machine and electricity, which provides an important guarantee for the development of the equipment manufacturing industry.
From the perspective of the machine tool industry chain, raw material costs account for a relatively large proportion. In comparison, upstream steel and electronics suppliers have more negotiation advantages; the industry is in a three-pronged pattern in Asia, Europe, America and the Americas, and Japan and Germany are still the industry leaders. China is accelerating its rise; the downstream of the industry is mainly equipment manufacturing, and the machine tool industry is more closely related to the downstream.
China's machine tool industry has huge production and scientific research capabilities, but the internal development is very uneven. Shenyang machine tools and Dalian machine tools are two big, with revenues exceeding 10 billion, while the second group's Qiji machine tools and Qinchuan machine tools are just over 20. The other companies are under 1.5 billion yuan, and the market concentration is not high.
For the seventh consecutive year, China's machine tool industry has become the world's largest consumer of machine tools, the first importing country and the third largest producing country. The average growth rate of the industry in the past seven years is 29%. However, the numerical control rate and localization rate are still low, and the product structure is also very reasonable. The industry still faces the shackles of "big but not strong", especially the outbreak of the international financial crisis, which makes these problems and drawbacks further prominent.
Affected by the decline in the growth rate of downstream industry demand, the overall growth rate of China's machine tool industry will also significantly slow down. It is estimated that the growth rate of the machine tool industry in 2009 is about 10%, which is likely to be a single digit. Among them, ordinary machine tools may be negative growth, and the increase of CNC machine tools, especially for medium and high-end CNC machine tools, may be above 10%.
At present, the localization rate of China's medium and high-end CNC machine tools is still very low, and the key equipment needed for national key projects mainly depends on imports. After years of technical accumulation and strong support from national industrial policies, some key areas have been broken. The overall technical level of domestic high-end CNC machine tools will be significantly improved in the future. Substituting imports will become a new point in China's machine tool industry in the future. .
Investing in the investment in the machine tool industry should focus on the two ideas of industrial integration, structural adjustment and product upgrading, and accordingly look for platform companies with reorganization and integration opportunities, as well as CNC products, especially medium and high-end CNC products, which are relatively large, technologically advanced or have potential for improvement. company of. Domestic A-shares include Shenyang Machine Tool (000410), Kunming Machine Tool (600806), Qinchuan Development (000837), Tianma (002122), Huadong CNC (002246) and Fain CNC (002270).
Sectional Door Accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.
Detail introduction for above main accessories
1.Motor and controller:
The garage door operator is designed for residential overhead sectional and tilt doors.
The operator memorizes the limit positions and unique braking system that slows the unit down at the end of its travel.
Rolling code remote control with max. 20 pcs hand transmitters.
The operator is equipped with a manual release lever which allows manual operation of the door in case of power failure.
The controller has a security LOCK function which prevents operation of the door from transmitter.
2.spring break device:
Sectional doors are hinged and they bend in the tracks as the door opens and closes. Many of these doors are counterbalanced with extension springs, also designated "stretch springs," and they have seven characteristics. The length is the measurement of all the coils pressed together. This, along with the inside diameter of the coils and wire size - the thickness of the wire from which the springs are made - determine the stretch, the distance the spring is extended - normally half the door height, and pull, the force the spring pulls when stretched its normal length. The type of ends determine how the ends of the spring are mounted. The initial tension is the percentage of pull needed to separate the coils. This is determined by the pitch with which the springs are wound. On sectional garage door springs this is normally 15 percent. For example a 100 pound pull spring requires 15 pounds of weight to separate the coils; when a door is open the two springs will support 15 pounds of door weight without any stretch.
Most extension springs are made of oil tempered wire. These are normally coated or painted. Some springs are made of galvanized wire.
3.able break device:
cable break device ,door hardware
adjustable bottom bracket .
the raw material hot plate
zinc plated
safety device
adjustable bottom bracket
the raw material hot plate
zinc plating
spring safety device ,2" and 3" safety device
once the cable is broken ,this devoice can keep the hurt away from the door falling
4.aluminum alloy rope pulley
Equipment: CNC stamping/punching machine, CNC bending machine, CNC cutting
machine, 5~250 tons punching machines, welding machine, polish machines...
Processed material: stainless steel: copper, carbon steel
Surface treatment: Hot galvanized, polishing
Making process:Stamping, deep drawing,bending, punching, laser cutting,threading,
welding, tapping, riveting, grinding
5.air bag system
It is a safety device. When the door is down to hit something, it will up automatically.
Operation pressure:<3mbar
Battery:CR2032*2
Battery lifetime>1 year
Emission frequency: 315MHZ
Emission power:<10mW
Receiver power source:12V
6.duplex enhanced guide wheel bracket
Determining the right type of sectional door roller for your garage door tracks can be a little confusing, especially when you do not know what you need to look for in a garage door roller. To simplify things, there are two primary things you need to be aware of. First are the actual dimensions of the roller, and second is purpose that you will be using the door for. You can read below about measuring your roller and choosing the right quality of material for your door.
Other Door Accessories,Electronic Door Accessories,Automatic Door Accessories,High Speed Door Radar Detector
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hffreezerdoor.com