July 2019 – Page 15 – CNC Machining & Turning, Milling, Metal parts

What are the payment methods for foreign trade export

What are the payment methods for foreign trade export?

According to the current practice of foreign trade export payment, foreign trade export payment is mainly divided into three types: L/C, T/T and D/P. Among them, L/C, with its high security, is a widely used payment method for foreign trade export payment, while T/T, with its high convenience, is used in foreign trade. The frequency of export payment is higher, and the probability of D/P is lower, but because we need to use it occasionally, we also need to know about D/P as a foreign trade export payment method.

First of all, the letter of credit, one of the most frequently used payment methods in foreign trade export payment, is no stranger to a senior international trade worker when it comes to raising a letter of credit, because it is a very common form of foreign trade export payment, and it will be accepted sooner or later in the process of foreign trade. A method of payment for foreign trade touched. Although there are a lot of professional terms in the dense English words of L/C, which make us spend a lot of time in interpreting and cutting words, it is a kind of payment method with strong guarantee for obtaining payment in theory if we want to consider it from the aspect of high security. Because a letter of credit is a commercial contract guaranteed by a bank, even if there are many rules and regulations on it, but if we do it one by one according to the above provisions, and provide the corresponding documents to the bank according to the conventional foreign trade process and requirements, then the bank must pay the corresponding money. Thus, the letter of credit is almost the same as the existence of money, which is why the seller can rely on the relevant foreign trade export letter of credit to the bank to carry out the operation of related loans when the capital turnover is relatively compact. But in practice, payment by L/C is not so perfect, because the L/C contains a lot of terms and conditions. Occasionally, some of them are very difficult to achieve. If they fail to do so, they will lead to artificial breach of contract, thus they can not get the export payment as they wish. . Of course, these are some low probability cases. In most cases, the operation of L/C payment still has high security.

Secondly, telegraphic transfer, a payment method commonly used in foreign trade export payment, generally appears in foreign trade cooperation with countries with good credit, such as Europe and the United States. In the process of foreign trade export payment, a common method of payment is to “pay deposit – – arrange production and delivery – – customers receive copies of documents to pay the balance – – sellers receive payment to send a complete set of documents” such a process.

The last one is D/P, which is essentially a kind of commercial credit and belongs to a kind of collection mode. The seller will implement a series of practical operations such as sending documents after receiving payment from the seller. Moreover, D/P, as a form of payment for export trade, can be divided into D/P at sight and D/P at forward. This form of D/P is more convenient in procedure and has a positive role in promoting the expansion of exports, but it requires sellers to bear a very high risk of foreign exchange receipt.

Proper use of screw barrel for injection molding machine

Screw is an important part of injection molding machine. Its function is transporting, compacting, melting, stirring and pressing plastic.

1. Each kind of plastic has an ideal processing temperature range. The processing temperature of the barrel should be controlled to make it close to this temperature range. When granular plastics enter the barrel from hopper, they will first reach the feeding section. Dry friction will inevitably occur in the feeding section. When these plastics are not heated enough and melt unevenly, it is easy to cause wear and tear on the inner wall of the barrel and the surface of the screw. Similarly, in the compression and homogenization stages, if the melting state of plastics is not uniform, the wear will also increase.

Screw head group

2, the speed should be adjusted properly. Some plastics are reinforced with fortifier, such as glass fiber, mineral or other filler. The friction force of these materials on metal materials is often much larger than that of molten plastics. In injection moulding of these plastics, if high-speed conversion is used, the shear force on the plastics will be increased, and the corresponding reinforcement will produce more torn fibers. The torn fibers contain sharp ends, which greatly increases the wear force. When inorganic minerals move on metal surface at high speed, their scraping effect is not small. So the speed should not be adjusted too high.

3, check out plastic waste. Generally speaking, there is no impurity in the fresh plastic purchased in the original, but after transportation, weighing, drying, mixing, especially adding recycled recycled recycled materials, it is possible to mix colored, especially adding recycled recycled recycled recycled materials, it is possible to mix impurities.

Spring nozzle

4. Moisture content in plastic has certain effect on the wear of screw surface. If the plastic has not completely removed the moisture before injection, when the residual water enters the screw compression section, the steam particles with high temperature and pressure which are mixed in the melt plastic before injection will be formed. With the advance of the screw during injection process, from homogenization section to screw head, these “steam particles” will expand in the process of injection, as in the case of pressure relief. The fine particles of hard particles can cause friction and damage to the wall. In addition, for some kinds of plastics, under high temperature and high pressure, water may become a catalyst for the cracking of plastics, resulting in harmful impurities that can erode the metal surface. Therefore, the drying work before plastic injection is not only directly related to the quality of the parts, but also affects the working life of the screw.

Classification of section steel

According to the different smelting quality of steel, the section steel is divided into ordinary section steel and high quality steel. According to the existing metal product catalog, ordinary section steel is also divided into large section steel, medium section steel and small section steel. Ordinary section steel can be divided into I-beam, channel steel, angle steel and round steel according to its section shape.

Large section steel: I-beam, channel steel, angle steel and flat steel are hot rolled in large section steel. Besides hot rolling, round steel, square steel and hexagonal steel are forged and cold drawn.

I-beam steel, channel steel and angle steel are widely used in industrial buildings and metal structures, such as factory buildings, bridges, ships, agricultural machinery and vehicles manufacturing, transmission towers, transport machinery, often used together. Flat steel is used as bridge, rack, fence, transmission ship, vehicle and so on at construction sites. Round steel and square steel are used for various mechanical parts, agricultural machinery parts, tools, etc.

Medium section steel: medium section steel with industrial, trough, corner, round and flat steel, which is similar to large section steel.

Small-sized steel: Small-sized steel, medium-angle, round, square and flat, similar in processing and use to large-sized steel, small-diameter round steel is often used as building steel bars.

The difference between UV laser marking machine and fiber laser marking machine

Ultraviolet laser marking machine and fiber laser marking machine are the mainstream laser marking equipments, which are widely used in various types of product marking packaging. Due to the application field, core components, and processing principles are different, the price of laser marking machines of different models is also very different. For example, the price of ultraviolet laser marking machine is nearly three times that of fiber laser marking machine. Today, endurance laser marking machine manufacturers tell you what is the difference between UV laser marking machine and fiber laser marking machine?

First, the laser and the principle

Ultraviolet laser marking machine: Developed by 355nm UV laser. The machine uses three-stage intracavity frequency doubling technology to compare with infrared laser. 355 UV focusing spot is very small, which can greatly reduce the mechanical deformation of the material. The laser processing heat has little effect.

Fiber laser marking machine: 1064nm wavelength is used. Regarding the laser wavelength, the shorter the general wavelength, the smaller the spot size of the laser, the higher the precision, the smaller the heat-affected zone formed during processing, and the more beautiful the processing effect.

There is also a method for processing the ultraviolet laser marking machine and a physical marking method for the laser relative to the fiber laser marking machine, and the ultraviolet laser marking machine is a chemical processing method, mainly photochemistry. The reaction is processed. The difference between the two different processing methods is that the laser physics processing method is mainly processing on the surface of products and materials, and the laser chemistry processing method can use laser to penetrate into the inside of the product material for processing.

Second, the contrast advantages of UV laser marking machine and fiber laser marking machine:

In terms of wavelength, the wavelength of the ultraviolet laser is shorter than the wavelength of visible light, so it is invisible to the naked eye. Although you can’t see these laser beams, these shortwaves allow the UV laser to focus more precisely, resulting in extremely fine circuit characteristics while maintaining excellent positioning accuracy.

There is also an important factor, the lower the temperature of the workpiece, the high-energy photons present in the ultraviolet light allow the UV laser to be applied to large PCB circuit board combinations, from standard materials such as FR4 to high-frequency ceramic composites and including polyimide. Various materials such as flexible PCB materials are suitable. Absorption rates of three common PCB materials under the action of six different lasers. These six lasers include excimer lasers (wavelength 248 nm), infrared lasers (wavelength 1064 nm), and two CO2 lasers (wavelengths of 9.4 μm and 10.6 μm, respectively). An ultraviolet laser (Nd:YAG, wavelength 355 nm) is a rare laser with consistent absorption in three materials.

The UV laser marking machine exhibits a very high absorption rate when applied to resin and copper, and also has an appropriate absorption rate when processing glass. Only expensive excimer lasers (wavelength 248 nm) will achieve better overall absorption rates when processing these primary materials. The variability of this material makes UV lasers the best choice for a wide range of PCB materials in many industrial applications, from the most basic boards, circuit wiring, to advanced processes such as pocket-sized embedded chips.

The computer system of the UV laser marking machine directly from computer-aided design data to the processing board means that no intermediates are needed in the board production process. Coupled with the precise focusing of UV light, the UV laser system can implement highly versatile solutions and repeat positioning. It can be said that the positioning is accurate, which is also one of the necessary requirements of the circuit board industry.

Third, the application area:

Fiber laser marking machine: high cost performance, basically suitable for laser marking of all kinds of metal surfaces. Due to the heat generated by its beam, it is not suitable for high-precision special material marking.

Ultraviolet laser marking machine: It is especially suitable for the high-end market of ultra-fine processing. The surface of packaging bottles for cosmetics, medicines, video and other polymer materials is marked with fine effect, the marking is clean and firm, better than ink coding and no pollution; flexible Pcb board marking, dicing; silicon wafer micro-hole, blind hole processing. Among them, 80% of the data lines on the market, the adapter marking is from the UV laser marking.

Advanced screw hole forming process for hardware parts

1. What is a mold punch?

The in-die tapping machine, also known as the in-die tapping machine, is a kind of equipment which cooperates with the continuous die of hardware and can process the screw hole quickly while stamping the hardware parts. At present, the most advanced screw hole forming technology of hardware parts breaks the traditional processing method. Its core is to integrate the traditional “stamping” and “tapping” technology into a direct forming in the die. Because of the effective avoidance of secondary operation (first stamping, then tapping), the production efficiency has been greatly improved, especially suitable for continuous, progressive and precision stamping dies.

In-die tapping technology realizes “chip-free processing” in real sense. Because tapping uses extrusion tap, chips formed by cutting will not be produced in the process of thread forming, which makes it clean and environmentally friendly, and the strength of thread has been improved very well.
Main features:
The production speed is fast and the efficiency is high.

It does not require manpower, long service life and low cost.

Wide range of adaptability, whether side, top, bottom, the screw holes on the inclined surface can be shaped. The blind hole can also be machined.

The specifications of screws are wide, and all kinds of metric, British, American and non-standard screw holes are all suitable.

The installation is simple, quick, stable and reliable.

Two. The working principle of the tapping machine.

In the punch processing cycle, there are three functional processes: feeding, positioning and bending. As shown in the figure below, the slider of the punch moves up and down.

A: punch stroke

B: punch press after product stable travel

C: punch stroke during feeding

Up and down movement of D: tap

Tap travel after stable E: products

F: tap safety clearance

Penetration of G: tap

H: tapping product thickness

K: tap movement during feeding

In the process of punching, B can be used for tapping, and the H of taps is effective processing.

The feeding time (feeding angle) affects the processing time of screw holes. Another factor affecting the processing time of the screw hole is the depth of the screw hole H, that is, how many pitches the depth of the screw hole has, and the more teeth the screw hole has, the more revolving circles it needs. In the process of punching, the processing of screw holes on the workpiece can only be done when the feeding stops and there is no movement in the horizontal direction. Therefore, when the feeding stops, the processing of screw holes begins, and when the feeding stops, the processing is completed at the lower dead point (180), and the lower dead point (180) tap begins to withdraw. Before the feeding starts, the tap goes out of the workpiece screw hole.

Working principle:

The screw nut of the tapping machine is driven by the force of the upper and lower movement of the punch, and the standard torsion is output by the precise transmission ratio, which drives the tap to rotate to complete the tapping operation.

Three. Classification of aircraft

1. mechanical single hole type

2. mechanical porous machine.

3. introduction of mechanical split models

4. servo motor type

5. flexible shaft transmission type

Four. The way to install the tapping machine in the mold.

According to the product, punch and die characteristics, the tapping machine has different installation forms in the mold.

1. installation of mechanical models

(1) Installation method of floating lifting plate, the product has bending and deep drawing, big floating, material conveying and stamping process has up and down movement, there are floating lifting pins to lift and convey materials.

(2) the installation mode of the model is special, and the tap can not reach the screw hole position normally. During the process of material transportation and stamping, there are up and down movements, and the location of the tapping parts is concave or needs special positioning.

(3) Installation mode of base model, material conveying and stamping process, up and down movement is very small, die floating about 0.5-1 mm.

(4) bracket installation mode, manipulator conveying material.

Example of installation: illustration of floating slab mold design

According to the installation mode of the mold tapping machine, the mold design needs to be matched with the mold tapping machine design.

Installation and dismantling methods of mechanical models

Drawer type insertion and pull out installation method, which greatly facilitates the installation and disassembly of customers.

2. servo motor type installation mode

The servo motor type parts are basically similar to the mechanical parts, and the installation methods are very similar.

The floating plate is installed, installed on the upper formwork and installed on the lower formwork. It can be used for the design of automatic equipment for tapping.

3. installation of flexible shaft type

Five, taps

1. taps installation and replacement methods

The tap is self-locking with quick locking, which is convenient, quick, stable and reliable.

2. tap safety protection

In the stamping process, if the punch breaks and there is no bottom hole of the screw, the tap will retract to prevent the tap from breaking and protect the tap.

3. tap cooling mode

Vaporized oil mist cooling: accurate positioning at the tap, uniform atomization, ensure product cleanliness, prevent overheating of the tap.

4. factors affecting life of tap

Material Material: The higher the hardness of the material, the lower the life of the tap, the better the lubrication performance of the material, the longer the life of the tap, the better the material fluidity and the longer the life of the tap.

Taper linear speed: Tapping thread speed of the tap is the best 10 m/min~30 m/min, the speed is more than 30 m/min, the tap life decreases;
Taper cooling and lubrication: Taper high-speed operation produces heat, product materials are easy to bond to the tap groove, so that the screw hole becomes larger. Good cooling

Introduction of mould

n industrial production, various kinds of moulds and tools are obtained by injection, blow moulding, extrusion, die casting or forging, smelting and stamping. In short, the mould is a tool used to make moulding objects. This tool is composed of various parts, and different moulds are composed of different parts. It mainly realizes the processing of the shape of the articles by changing the physical state of the formed material. Known as the “mother of industry”.

Under the action of external force, the billet becomes a tool with specific shape and size. It is widely used in stamping, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, as well as engineering plastics, rubber, ceramics and other products of compression or injection molding. The die has a specific contour or inner cavity shape, and the blank can be separated according to the contour shape (blanking) by applying the contour shape with the edge. The shape of the inner cavity can be used to obtain the corresponding three-dimensional shape of the blank. The mold generally consists of two parts, the movable die and the fixed die (or punch and concave die), and the two parts can be divided into two parts. When separate parts are removed, the blank is injected into the mold cavity to form. Mould is a precise tool with complex shape and bearing the bulging force of billet. It requires high structural strength, stiffness, surface hardness, surface roughness and processing accuracy. The development level of die production is one of the important marks of the level of mechanical manufacturing.

Application name of ginning net

Wire
Rolled wire mesh material is composed of iron wire and black wire, which has the characteristics of beautiful structure and durability. The knitting characteristics of wire mesh are rolling before knitting, bidirectional wave isolation bending, locking bending, flat top bending, bidirectional bending and unidirectional wave isolation bending. Wire mesh is widely used in mines, coal plants, buildings, petrochemical industry, construction machinery and so on.
Galvanized
The general name of galvanized wire mesh is wire mesh, which can be divided into low carbon steel wire mesh, high carbon steel wire mesh, medium carbon steel wire mesh and angle wire mesh.
Galvanized cotton gin net
Galvanized wire mesh, copper-clad wire mesh, and stainless steel wire mesh (also known as galvanized cold-drawn wire mesh). The materials of galvanized pattern net are stainless steel wire, high carbon steel wire, medium and low carbon steel wire, galvanized iron wire, galvanized steel wire and non-ferrous metal wire. Galvanized patterned wire mesh is woven by pre-bending before forming. It is divided into locking braiding, bidirectional plain braiding, unidirectional corrugated braiding, bidirectional plane braiding, bidirectional corrugated braiding, rectangular hole braiding and oblique braiding. Widely used in mining, petroleum, chemical industry, construction, machinery accessories, protective nets, packing nets, barbecue nets, barbecue oven nets, galvanized flower-rolling nets, sintering furnace nets, hardware products nets, handicraft nets, vibrating screen nets, basket nets, food machinery nets, cooker nets, wall nets, grain, highway, iron. Road and infrastructure network.
Bai steel
The white steel ginning net is also called the steel twisted net, and the material is made of twisted wire. According to the compilation method, it is also called the whole weaving cotton thread net and the Flower knitted net. It can be divided into: Mine ginning net and breeding ginning net. It is used for safety protection of golf course, greening fence, river course, building, breeding and residence.
Stainless steel
The material of stainless steel patterned mesh has the characteristics of stainless steel wire 301, 302, 304, 304L, 316, 316L, 321 finished products: heat resistance, acid resistance, alkali resistance, corrosion resistance, wear resistance, solid structure. The knitting features are first rolling, post bending, two-way bending, two-way wave bending and unidirectional bending.
Mainly used in food, mining, chemical industry, medicine, petroleum, metallurgy, machinery, protection, construction, handicrafts and other industries.
Black steel ginning nets are mainly used in mines, coal plants, buildings, petrochemical industry, construction machinery and so on.
It is pre-bended into corrugated wire, so that two bending clips in the relative position, to ensure the size of the mesh.
Material: black steel wire, white steel wire, lead wire, stainless steel wire, etc.
Its braiding and characteristics: rolling before braiding, bidirectional wave isolation bending, locking bending, flat top bending, bidirectional bending, unidirectional wave isolation bending; strong structure
Wire rod
Rolling wire mesh is also known as grinding wire mesh or grinding wire mesh, heavy grinding wire mesh, vibration grinding wire mesh. According to the material quality, it can also be called iron ginning net, steel ginning net and stainless steel ginning net. The material of wire-rolling mesh includes galvanized iron wire, wire rod, stainless steel wire and other materials, iron wire, black steel wire, white steel wire, lead wire, stainless steel wire, copper wire and other non-ferrous metal wires. The characteristics of the wire rod net are beautiful, durable and durable. The braiding methods are rolling before braiding, bidirectional wave isolation bending, locking bending, flat top bending, bidirectional bending and unidirectional wave isolation bending. It is mainly used in mines, coal plants, construction, petrochemical industry, construction machinery and other places. It can be produced according to customers’requirements.

Application characteristics of H steel

Hot-rolled H-beam has excellent mechanical properties and excellent service performance by rationally distributing the height-width ratio of section size according to different uses.

The design style is flexible and rich. In the case of the same beam height, the opening of steel structure is 50% larger than that of concrete structure, which makes the layout of the building more flexible.

The structure is light in weight. Compared with the self-weight of concrete structure, it is lighter, reduces the self-weight of structure, reduces the internal force of structure design, and makes the foundation treatment of building structure lower, the construction simple and the cost lower.

Hot-rolled H-section steel structure is scientific and reasonable in structure, good in plasticity and flexibility, high in structural stability. It is suitable for buildings with large vibration and impact loads, strong in resistance to natural disasters, especially for some buildings with multiple earthquake occurrence zones. According to statistics, among the world’s devastating earthquakes of magnitude 7 or above, steel structure buildings mainly made of H-section steel have the least degree of damage.

Increase the effective use area of the structure. Compared with concrete structure, steel structure column section area is smaller, which can increase the effective use area of buildings. Depending on the different forms of buildings, it can increase the effective use area by 4-6%.

Compared with welded H-section steel, it can obviously save labor and material, reduce the consumption of raw materials, energy and labor, and has low residual stress, good appearance and surface quality.

It is convenient for mechanical processing, structural connection and installation. It is also easy to be dismantled and reused.

H-section steel can effectively protect the environment, which can be embodied in three aspects: firstly, compared with concrete, dry construction can produce less noise and dust; secondly, due to the reduction of self-weight, less soil for foundation construction and less damage to land resources; moreover, a large number of concrete consumption can be reduced, and the amount of rock excavation can be reduced. Third, after the expiration of the service life of the building structure, the amount of solid waste generated after the structure demolition is small, and the recycling value of scrap steel resources is high.

Hot-rolled H-section steel structure has a high degree of industrialization, which is convenient for mechanical manufacture, intensive production, high precision, easy installation and quality assurance. It can be built into real housing factories, bridge factories, industrial factory building factories and so on. The development of steel structure has created and promoted the development of hundreds of new industries.

The construction speed is fast, the occupying area is small, and it is suitable for all-weather construction. The construction speed of steel structure made of hot-rolled H-beam is about 2-3 times that of concrete structure, the turnover rate of funds is doubled, the financial cost is reduced, and the investment is saved. Taking Jinmao Tower in Pudong, Shanghai, as an example, the main structure with a height of nearly 400 meters completed the structure capping in less than half a year, while the steel-concrete structure required two years.

CNC machine maintenance must be emphasized

Correct operation and maintenance of CNC equipment can prevent abnormal wear of machine tools and avoid sudden failure of machine tools. Careful maintenance of machine tools can maintain the long-term stability of machine tool processing accuracy and prolong the service life of machine tools. This work must be highly valued and implemented from the management level of the factory.

Responsible for maintenance

1. The operator is responsible for the use, maintenance and basic maintenance of the equipment.

2. Equipment maintenance personnel are responsible for equipment maintenance and necessary maintenance.

3. Workshop management is responsible for the supervision of all operators and equipment maintenance in the workshop.

Basic requirements for the use of numerical control equipment

1, numerical control equipment requires to avoid wet, dusts and corrosive gas sites.

2. Avoid direct sunlight and other thermal radiation. Precision numerical control equipment should be far away from the equipment with large vibration, such as punch, forging and pressing equipment.

3, the operation temperature of the equipment should be controlled between 15 degrees and 35 degrees. Precision machining temperature should be controlled at around 20 degrees, and temperature fluctuation must be strictly controlled.

4. In order to avoid the large fluctuation of power supply (more than 10% positive and negative) and possible instantaneous interference signals, special line power supply (such as separate supply from low-voltage distribution room for CNC machine tools) and voltage stabilization devices are generally used in CNC equipment, which can reduce the impact of power supply quality and electrical interference.

Maintain accuracy in daily machining

1. After startup, the machine must be preheated for about 10 minutes before processing; long-term unused machines should be prolonged preheating time;

2, check whether the oil circuit is smooth.

3. Place the worktable and saddle in the center of the machine before shutdown (move the three-axis travel to the middle of each axis travel);

4, machine tools remain dry and clean.

Daily maintenance

1. Clean the dust and iron scraps of machine tools every day: including machine tool control panel, spindle taper hole, tool lathe, tool head and taper handle, tool warehouse arm and tool warehouse, turret, XY axle sheet metal cover, flexible hose in machine tool, tank chain device, chip slot, etc.

2, check the lubricating oil level to ensure machine lubrication.

3, check the coolant in the coolant box is sufficient, not enough to add in time.

4, check whether the air pressure is normal.

5. Check whether the air blowing in the inner cone hole of the spindle is normal. Wipe the inner cone hole of the spindle with clean cotton cloth and spray light oil.

6, clean the knife storage knife arm and cutter, especially the knife claw;

7, check all the lights, whether the warning lights are normal.

8. Check the leakage of oil pressure unit pipe.

9. Machine tools are cleaned and cleaned every day after work.

10, keep the environment clean around the machine.

Weekly maintenance

1, clean the heat exchanger air filter, cooling pump, lubricating oil filter screen;

2, check whether the tool bolt is loose and whether the knife handle is clean.

3, check whether the three axis mechanical origin is offset.

4, check the tool magazine movement or tool magazine turning smoothly.

5. If there is an oil cooler to check the oil cooling oil, if it is lower than the scale line, please add the oil and cold oil in time.

6. Clean the impurities and moisture in the compressed gas, check the oil quantity in the oil mist separator, check whether the work of each solenoid valve is normal, check the sealing of the pneumatic system, because the quality of the pneumatic system directly affects the tool change and lubrication system;

7. Prevent dirt and dirt from entering the numerical control device. Oil mist, dust and even metal powder are common in the air of machine shop. Once they fall on the circuit board or electronic device in the CNC system, it is easy to cause the insulation resistance between components to drop, and even cause the damage of components and circuit board.

Monthly maintenance

1. Check the track lubrication condition and ensure that the track surface must be well lubricated.

2. Check and clean limit switches and touch blocks.

3. Check whether the oil in the tool cylinder is enough or not to add in time.

4, check the signs on the machine and whether the warning nameplate is clear.

Half year maintenance

1. Remove the anti-chip shield of the shaft, clean the tubing joint of the shaft, ball guide screw, three-axis limit switch, and check whether it is normal. Check the effectiveness of each axis hard rail scraping brush.

2. Check whether the servomotor and head of each axis are running normally and whether there is abnormal sound.

3. Replace oil pressure unit oil and tool reducer.

4. Test the clearance of each shaft and adjust the compensation amount if necessary.

5. Clean the dust in the electric box (ensure the machine is closed).

6, check the contact points, connectors, sockets, switches normally.

7, check whether all buttons are sensitive and normal.

8, check and adjust the mechanical level;

9, clean the water tank and replace the cutting fluid.

Annual professional maintenance or repair

Attention: professional maintenance or repair should be carried out by professional engineers.

1, grounding protection system should have good continuity to ensure personal safety.

2. Periodic inspection of gas elements such as circuit breakers, contactors, single phase or three phase arc extinguishing devices is carried out. If the wiring is loose, whether the noise is too large, find out the reasons and eliminate hidden dangers;

3, ensure the normal operation of the radiator fan in the cabinet, otherwise it may cause damage to the gas parts.

4. Fuse fuse and air switch frequently trip. We should find out the reason and eliminate it in time.

5, check the vertical accuracy of each axis and adjust the geometric accuracy of the machine tool. Restore or achieve

Development of hardware products

As the largest steel producer in the world and the most populous country in the world, China has the advantage of low cost of raw materials and labor for manufacturing hardware products. In recent years, China’s export of hardware products has maintained a steady growth trend. China has become one of the major exporters of hardware products in the world. It is expected that every year in the future. Exports will remain 10-15% growth.

“China’s Hardware Industry Development Prospects and Investment Strategic Planning Analysis Report” shows that in 2010, China’s hardware industry has been growing rapidly throughout the year. Generally speaking, the hardware industry is running well, the growth momentum of domestic and foreign sales is obvious, the import and export are growing rapidly, the economic indicators are rising rapidly, and the industry as a whole has basically recovered to the level before the financial crisis.

According to statistics, in 2010, 8811 Enterprises above the scale of China’s hardware products industry completed a total industrial output value of 635.234 billion yuan, a cumulative increase of 29.43%. It is mainly concentrated in Guangdong, Zhejiang, Shandong, Jiangsu and Hebei provinces, with a total industrial output value of 474.128 billion yuan, accounting for 74.64% of the total industrial output value.

Hardware industry has played a positive role in improving people’s living standards, improving the quality of life, constantly meeting people’s growing material and cultural needs, expanding domestic and foreign market demand and absorbing labor employment, and accelerating the pace of industrialization and urbanization. In the process of achieving the goal of building a well-off society in an all-round way, it bears an important historical mission. During the “Twelfth Five-Year Plan” period, China will change the development mode of the hardware industry, continue to maintain orderly, healthy and rapid growth of the industry on the premise of saving resources, reducing consumption, protecting the environment and improving the quality and efficiency of economic growth, and strive to transform China from a big hardware manufacturing country to a powerful hardware manufacturing country. It is estimated that the gross industrial output and industrial added value will increase by 10-12% annually during the 12th Five-Year Plan period, and the industrial output value will double in 2015 compared with 2010.