chengcg – Page 154 – CNC Machining & Turning, Milling, Metal parts

What are the design principles for CNC machine tool programming

CNC machining refers to a process for machining parts on CNC machine tools. The process specifications of CNC machine tools and traditional machine tools are generally the same. The difference is that CNC technology uses digital information to control the machining of parts and tool displacements. . It is an effective way to solve the problems of variable parts, small batch size, complex shape and high precision, and to achieve high efficiency and automatic processing. The following Yida Lurun Petrochemical briefly introduces the design principles of the CNC lathe programming to determine the processing plan:

Student training operation 1

First, determine the principle of the processing plan

The processing plan is also called the process plan. The machining plan of the CNC machine tool includes the formulation of the process, the work step and the route of the cutter. In the machining process of CNC machine tools, due to the complex and diverse processing objects, especially the shape and position of the contour curve, and the influence of various factors such as different materials and batches, specific analysis should be carried out when formulating the processing plan for specific parts. And treat differently and handle it flexibly. Only in this way can the processing plan formulated be reasonable, so as to achieve the objectives of superior quality, high efficiency and low cost.

The general principles for formulating a processing plan are: first coarse and then fine, first and then far, first inside and outside, the least program, the shortest route and special treatment.

Second, the steps of the CNC machining program

(1) first coarse and fine

In order to improve the production efficiency and ensure the finishing quality of the parts, the roughing process should be arranged during the cutting process. In a short period of time, a large amount of machining allowance before finishing is removed, and the allowance for finishing is as uniform as possible. Sexual requirements. When the roughing process is completed, the semi-finishing and finishing after the tool change should be arranged. The purpose of arranging the semi-finishing is to arrange the semi-finishing as a transitional process when the uniformity of the remaining amount after roughing can not meet the finishing requirements, so that the finishing allowance is small and uniform.

When arranging a finishing process that can be performed with one or more knives, the final contour of the part should be continuously machined from the last knive. At this time, the position of the advance and retraction of the machining tool should be considered properly. Try not to arrange the cutting and cutting or changing and stopping in the continuous contour to avoid the elastic deformation caused by the sudden change of the cutting force, resulting in a surface stroke on the smooth connecting contour. Rickets such as injuries, sudden changes in shape, or stagnant knife marks.

(2) First and then far

The far and near here is based on the distance of the processing part relative to the tool point. In general, especially in roughing, it is usually arranged to process the part close to the tool point and process it from the far side of the tool point to shorten the tool moving distance and reduce the idle travel time. For turning, it is advantageous to maintain the rigidity of the blank or semi-finished part to improve the cutting conditions.

(3) First inside and outside

For parts that require both the inner surface and the outer surface, when formulating the machining plan, it is usually necessary to arrange the inner and inner cavities and the outer surface. This is because it is difficult to control the size and shape of the inner surface, the rigidity of the tool is correspondingly poor, the durability of the tip is easily reduced by the heat of cutting, and it is difficult to remove the chips during processing.

(4) The shortest route

The work focus of the pass route is determined, which is mainly used to determine the roughing and idle travel path, because the cutting path of the finishing cutting process is basically carried out along the order of its parts. The path of the tool generally refers to the path that the tool starts from the point of the tool point until it returns to the point and ends the machining process, including the path of the cutting process and the non-cutting idle path such as tool introduction and cutting. Under the premise of ensuring the processing quality, the machining program has the shortest path, which not only saves the execution time of the whole machining process, but also reduces unnecessary tool consumption and wear of the sliding parts of the machine feed mechanism.

Third, the choice of cutting tools
(1) Currently commonly used cutting materials are high speed steel and hard alloy. Because high speed steel can only maintain its cutting performance at lower temperatures, it is not suitable for high speed cutting. Cemented carbide has better heat resistance and wear resistance than high-speed steel, so carbide tools are more suitable for cutting.
(2) When processing high-viscosity and high-plastic parts, the tool is required to have high wear resistance and heat resistance, and can maintain excellent cutting and chip breaking performance at a higher temperature. On the premise of sufficient strength, a larger rake angle should be used to reduce the plastic deformation of the metal to be cut, reduce the cutting force and cutting temperature, and reduce the depth of the hardened layer.

(3) In the choice of tool coating, it is advisable to select coating materials with high hardness, good adhesion and toughness. The ultra-fine coating process improves the wear resistance of the blade, smoothes the surface of the coating, reduces friction and reduces the generation of built-up edge. It is suitable for high-speed semi-finishing and fine turning of stainless steel under good working conditions.

Fourth, the choice of cutting oil
Due to the poor processability of the high-speed cutting process, there are higher requirements for the cooling, lubrication, penetration and cleaning performance of the cutting oil. The commonly used cutting oil can form high melting point sulfide on the metal surface during the cutting process, and it is not easy to be high temperature. Destruction, good lubrication, and a certain cooling effect, generally used for high-hardness stainless steel cutting, drilling, reaming and tapping.

Bending machine structure

The bending machine is an important equipment for bending and forming the workpiece in the sheet metal industry. Its function is to press the steel plate into various shapes according to the process requirements. As shown in the figure, the hydraulic sheet bending machine is mainly composed of left and right columns, workbench and beam. The left and right cylinders are fixed on the column. The slider is connected with the piston of the cylinder and along the guide rail fixed on the column. Movement, the lower mold is fixed on the workbench, the upper mold is installed at the lower end of the slider, the hydraulic system provides power, and the electric system gives instructions. Under the action of the oil cylinder, the slider drives the upper mold to the lower mold and the lower mold to realize the folding of the sheet material. bend. The left and right columns, workbench and slider (hereinafter referred to as the three major parts) are the key parts of the bending machine. The sum of the weights of the three large parts accounts for 70%~80% of the total weight of a bending machine. Its strength and rigidity directly determine the running accuracy, service life of the machine and the accuracy of the workpiece.

1. Slider part: hydraulic drive is adopted, and the slider part is composed of slider, oil cylinder and mechanical stop fine adjustment structure. The left and right cylinders are fixed on the frame, and the piston (rod) is driven by the hydraulic pressure to move the slider up and down, and the mechanical stop is controlled by the numerical control system to adjust the value;
2, the workbench part: operated by the button box, so that the motor drives the material rack to move back and forth, and the distance controlled by the numerical control system is controlled, the minimum reading is 0.01 mm (the front and rear positions have the limit of the travel switch);
3. Synchronous system: The machine consists of a mechanical synchronizing mechanism consisting of a torsion shaft, a swing arm and a joint bearing. The structure is simple, the performance is stable and reliable, and the synchronization precision is high. The mechanical stop is regulated by the motor and the numerical control system controls the value;
4, the material blocking mechanism: the material is driven by the motor, and the two screw rods move synchronously through the chain operation, and the numerical control system controls the size of the material.

Wrench classification

Wrenches are basically divided into two types, dead wrenches and adjustable wrenches.
Wrench
. The former refers to a wrench that has a fixed number written on it, and the latter is an adjustable wrench. 1. Wrench: One or both ends are provided with fixed-size openings for screwing nuts or bolts of a certain size. 2. Torx wrench: The working end with hexagonal hole or twelve-corner hole at both ends is suitable for occasions where the working space is small and ordinary wrench cannot be used. 3. Combination wrench: One end is the same as the single wrench, the other end is the same as the wrench, and the bolts or nuts of the same specification are screwed at both ends. 4. Adjustable wrench: The width of the opening can be adjusted within a certain size range, and the bolts or nuts of different specifications can be twisted. The structural feature of the wrench is that the fixed jaw is made into a flat jaw with a fine tooth; the movable jaw is made at one end with a flat jaw; the other end is made with a concave jaw with a fine tooth; the worm is pressed downward, the activity The jaws can be removed quickly and the jaws can be replaced. 5. Hook wrench: Also known as a crescent wrench, used to twist flat nuts with limited thickness. 6. Socket wrench: It is composed of a plurality of sleeves with hexagonal holes or twelve-corner holes and is equipped with various accessories such as handles and posts. It is especially suitable for bolts with very narrow position or deep depression. Or nut. 7. Allen key: An L-shaped hexagonal bar wrench designed to screw the hexagon socket head cap screws. The model of the Allen key is in accordance with the size of the opposite side of the hexagon. The size of the bolt has the national standard. Uses: Specially used for fastening or disassembling round nuts on machine tools, vehicles and machinery. 8. Torque wrench: It can show the applied torque when the bolt or nut is turned; or when the applied torque reaches the specified value, it will emit a light or sound signal. Torque wrenches are suitable for installations where the torque is clearly specified. cnc machining

How to choose a planetary reducer to select a gear

The choice of planetary reducer is very important for the motor. When selecting a planetary reducer, the selection of the reducer gear is a very important part. Because the gears are not matched and unreasonable, the reducer will not operate normally. How to choose the planetary reducer to select the gear?

1. When selecting a gear, the planetary reducer should pay attention to the hardness of the working tooth surface of the pinion gear is slightly higher than the working tooth surface hardness of the large gear.

2, the use of a smaller pressure angle can reduce the running noise, comprehensively consider the impact of strength, usually take the standard value of 20 ° C. When the structure allows, the use of helical gears should be given priority, and the vibration and noise are greatly reduced compared with the spur gears. Generally, the helix angle is selected between 8 ° C and 20 ° C.

3. Under the economic ability that the user can withstand, the accuracy level of the gear should be improved as much as possible. High-precision grade gears produce much less noise than low-precision grade gears.

4. Under the premise of satisfying the bending fatigue strength, when the center distance of the planetary reducer is constant, more teeth should be selected, which can improve the coincidence degree, make the transmission smooth and reduce noise. Under the premise of meeting the transmission requirements, the number of teeth of the large and small gears should be made as large as possible, so as to disperse and eliminate the influence of the gear manufacturing error on the transmission, and also avoid the teeth of the large and small gears periodically meshing with each other, so that the transmission is stable. Reduce noise.

The above is the method of selecting the planetary reducer gear. What we can see is that the use of the planetary reducer is an aspect that must be paid attention to for the choice of gears. I hope that the introduction of Dongguan Ji Chuang Xiaobian can help everyone.

How to replace all kinds of filter elements? Collect this article, get it all

Replace or clean the air filter at least every 2000 hours or when the warning light is on. The outer filter can be cleaned up to 6 times and must be replaced. The inner filter is a disposable product that cannot be cleaned and replaced directly. If the filter is damaged, it must also be replaced.

Clean the compressed air with a maximum pressure of 5 BAR using air compressed gas. Do not place the nozzle close to 3 – 5 cm. Blow the filter from the inside along the folds.

Air conditioning filter replacement

The air conditioning filter replaces the air conditioning filter every 1000 hours or 5 months. If the air conditioning filter is clogged, the amount of air intake will decrease and the cooling/heating capacity will decrease. Therefore, it is necessary to clean or replace it regularly (there is a part of the brand air-conditioning filter in the rear position of the cab).

Hydraulic oil line filter replacement

The hydraulic oil line filter is replaced every 500 hours. Pay attention to when disassembling and replacing:

1. When replacing the pipe filter, use a filter wrench to turn the filter counterclockwise to remove it.

2. Apply hydraulic oil to the new filter element and apply a layer of hydraulic oil to the O-ring seal.

Fuel filter replacement

The engine fuel filter is replaced every 1000 hours. Pay attention to when disassembling and replacing:

1. Turn off the fuel line switch when replacing the fuel filter to prevent oil from being discharged all the time.

2. Use a filter wrench to turn the filter counterclockwise to disassemble it.

3. Install a layer of fuel on the new filter O-ring and install it (do not fill the fuel filter with fuel, because unfiltered fuel will damage the fuel components).

Hydraulic oil return filter replacement

The hydraulic oil return filter is replaced every 1000 hours. Pay attention to when disassembling and replacing:

1. First release the internal pressure of the hydraulic tank.

2. Unscrew the hydraulic oil return oil end cap.

3. Remove the springs in sequence, bypass the valve assembly, and finally remove the return oil filter.

4. Install the oil return filter according to the disassembly procedure.

Hydraulic oil filter (51).jpg

Pilot filter replacement

The pilot filter is replaced every 1000 hours. Pay attention to when disassembling and replacing:

1. Use a wrench to remove the pilot filter and remove the filter bowl and filter.

2. First install the pilot filter element onto the pilot filter holder.

3. Install a layer of lubricating oil on the new pilot filter O-ring seal.

Hydraulic oil suction filter replacement

The hydraulic oil suction filter is replaced every 2,000 hours. Pay attention to when disassembling and replacing:

1. Press down the air ventilator to release the internal pressure of the hydraulic tank.

2. Remove the oil-absorbing filter end cap and pull out the oil-absorbing filter.

3. Clean or replace the oil suction filter according to the hours of operation.

Type of CNC blade

2018/10/12 9:40:09 Viewers:6

There are many kinds of CNC blades and they are widely used. Nowadays, CNC blades are mainly the following types of blades:

1. Monolithic: Grinded from a single piece of material, the cutting part can be ground to the desired shape according to different purposes.

2, mosaic: it is divided into welding and machine clamp. The machine clamp type is different according to the structure of the cutter body. Can be divided into non-transposition and indexable

3. Damping type: When the length and diameter ratio of the working arm of the tool is greater than 4, in order to reduce the vibration of the tool and improve the machining accuracy, a special structure tool is used. Mainly used for pupils.

4. The cutting coolant of the internal cooling type is transmitted to the inside of the cutter body through the machine spindle or the cutter head and is sprayed from the injection hole to the cutting edge.

5, special types: including strong clamping, reversible tapping, composite tools, etc. At present, CNC Machining tool tools mainly use machine clamp indexable tools.

Mold process performance

Mold manufacturing generally involves several processes such as forging, cutting, and heat treatment. In order to ensure the quality of the mold and reduce the production cost, the material should have good forgeability, machinability, hardenability, hardenability and grindability; it should also have small oxidation, decarburization sensitivity and quenching. Deformation cracking tendency.

1. Forgeability
It has low hot forging deformation resistance, good plasticity, wide forging temperature range, low tendency for forging cracking and precipitation of reticulated carbides.
2. Annealing process
The spheroidizing annealing temperature range is wide, the annealing hardness is low, the fluctuation range is small, and the spheroidization rate is high.
3. Machinability
Large cutting amount, low tool loss and low surface roughness.
4. Oxidation and decarburization sensitivity
When heated at high temperature, the anti-oxidation energy is good, the decarburization speed is slow, and it is not sensitive to the heating medium, and the tendency to produce pitting is small.
5. Hardenability
Uniform and high surface hardness after quenching.
6. Hardenability
After quenching, a deep hardened layer can be obtained, which can be hardened with a mild quenching medium.
7. Quenching deformation cracking tendency
The conventional quenching volume change is small, the shape is warped, the distortion is slight, and the abnormal deformation tendency is low. Conventional quenching cracking has low sensitivity and is not sensitive to quenching temperature and workpiece shape.
8. Grindability
The relative loss of the grinding wheel is small, the amount of grinding without the limit of grinding is large, and it is not sensitive to the quality of the grinding wheel and the cooling condition, and it is not easy to cause abrasion and grinding crack.

What materials and methods of using titanium plating

In the electroplating process, the titanium hanger mainly functions as a conductive, supporting and fixing part, so that the part can obtain a uniform current in the plating tank as much as possible. Therefore, designing and making reasonable hangers is of great significance for ensuring product quality, improving production efficiency and reducing costs. The following principles must be mastered when designing and selecting hangers: First, the selection of titanium hanger materials and insulation materials should be reasonable, and the structure should ensure the uniformity of coating thickness; second, it must have good electrical conductivity and meet the process requirements. Third, it is convenient to operate between the titanium hanger and the parts, which is beneficial to increase productivity. For more information, please click “How to Reduce Corrosion Methods for Titanium Hangers”.

(1) Forms of general titanium hangers and materials used

The form and structure of the universally-plated titanium hanger should be determined according to the geometry of the plating, the technical requirements of the coating, the process and the size of the equipment. For example, the sheet-like plated member may float with the resistance of the plating solution between the upper and lower processes, and the plated member is clamped or tied with a copper wire when the hanger is selected. If the plated part is heavy and has holes, a hook-shaped hanger can be used. For example, the bicycle rim is round, and as long as the inside is plated, a larger clamp is used to clamp the outside of the rim.

Common fixtures are mostly used for plating that is not too thick, allows parts to sway in the plating tank, and has a low current density, such as galvanizing, cadmium, tin, copper, nickel, and the like. Universal hangers are generally composed of five parts. These five parts can be welded into a fixed type, and the hooks and struts can be made into an adjustable assembly. The effects of free space and power lines should be considered between parts and parts during plating. To make the coating uniform, a certain distance must be maintained. If the form and structure of the titanium hanger is not properly selected, it will affect the quality of the coating.

In short, the form of the titanium hanger must depend on the shape of the plated part and the surface to be plated. Whether the selection of the form and structure of the titanium hanger is reasonable in electroplating, and whether the use of the material is appropriate will directly affect the product quality and production efficiency.

(2) Calculation of the cross-sectional area of titanium hangers

The size of the cross-sectional area of the titanium hanger is very important. If the cross-sectional area of the titanium hanger is too small, it takes a long time to make the thickness of the coating meet the requirements. If the cross-sectional area is too large, it will result in waste of materials, so the calculation of the cross-sectional area of the titanium hanger should be reasonable.

(3) The use of titanium hangers requires good contact between the hanger and the cathode rod, which is critical to the quality of the plating, especially in the case of high-current hard chrome plating and decorative plating using cathode moving agitation, often due to poor contact. The contact resistance is generated to make the current not smooth. Therefore, intermittent power failure occurs, causing poor bonding strength of the plating layer, and also affecting the thickness of the plating layer, resulting in a decrease in corrosion resistance. It is therefore required to maintain a clean and good contact of the contact points between the titanium hanger and the cathode rod during processing of the hanger and the use. The cross section of the guide rod is usually round and rectangular, and the suspension method is required to design the hook.

(4) Insulation of titanium hangers, cnc machining

The main and struts of the titanium hanger are immersed in the plating solution during electroplating. During the electroplating, the titanium hanger and the plated part are subjected to the same process of electroplating. If the titanium hanger and the plating solution are not insulated, the plating area will be enlarged, thereby reducing the current density, prolonging the plating time, wasting energy and metal materials, and increasing the plating cost. Therefore, the insulation of the titanium hanger is very important. It is required that the insulating material can withstand high temperature during electroplating, does not affect the composition of the plating solution, and is not damaged for a certain period of time.

List of zigzag machining on a CNC lathe

In the past, machining a zigzag on a part required an extra operation on the CNC milling machine or the broaching machine.

This requires separate setup on additional machines, resulting in additional labor costs (for milling or broaching operators), and of course additional handling, movement, and possible temporary part storage between processes. In addition, the part may require an intermediate cleaning operation prior to zigzag machining.

If you use the zigzag machining of the part as a secondary operation, then with this serrated razor, you can simply use it as another step on the CNC lathe.

At the beginning of the zigzag process, the spindle remains stationary, while the turret walks three times in the Z-axis, forming the first five teeth and the fully formed sixth tooth in a progressive form.

The tool is mounted on the turret of the lathe and forms serrations along the part through a continuous Z-axis stroke. At the beginning of the process, the spindle remains stationary and the tool runs three lanes to progressively form the first five teeth and the sixth tooth of the full shape. The spindle is then indexed to the next tooth position (requires a C axis) where the first five teeth are incrementally formed and the last tooth is completed. One tooth is machined each time the spindle is indexed to the next tooth position and the turret finishes the part stroke. This process continues until the part is indexed over the entire circle and the zigzag is completely formed.

Once the first tooth is fully formed, the spindle indexes the part to the next tooth position and the turret goes through another path to complete the machining of the tooth. Once the spindle is indexed once, a complete tooth is formed. The indexing cycle continues until the part is fully machined to the desired sawtooth shape.

The process is simple and fast. For example, the sawtooth machining of 1045 steel parts can be machined in less than 7 seconds on a conventional CNC lathe with C-axis function. Combining the sawtooth machining operation into a single lathe process simplifies the handling of the part: this operation does not have to be performed on additional machines, avoiding the cleaning of parts between different processes, additional machine setup and operating costs, and additional part handling. The most important point is that the part is fully machined when it leaves the lathe and is ready for cleaning and delivery to the customer.

According to the applicable occasions and mechanism characteristics of CNC machine tools, the following requirements are imposed on the structure of CNC machine tools:

First, the high static and dynamic stiffness of the machine tool

The CNC machine tool is automatically processed according to the instructions provided by numerical control programming or manual input data. Due to the geometrical accuracy and deformation of the mechanical structure (such as machine bed, guide rail, table, tool holder and headstock), the positioning error cannot be adjusted and compensated during the machining process. Therefore, mechanical components must be used. The resulting elastic deformation is controlled to a minimum to ensure the required machining accuracy and surface quality.

In order to improve the rigidity of the CNC machine tool spindle, not only the three-support structure is often used, but also the double-row short cylindrical roller bearing and the angular contact radial thrust bearing with good rigidity are hinged out to believe that the force bearing is used to reduce the radial direction of the main shaft. And axial deformation. In order to improve the rigidity of the large parts of the machine tool, the bed of the closed interface is adopted, and the hydraulic balance is used to reduce the deformation of the machine tool caused by the positional change of the moving parts. In order to improve the contact stiffness of various parts of the machine tool and increase the load-carrying capacity of the machine tool, the contact point per unit area is increased by scraping, and a sufficient pre-load is applied between the joint surfaces to increase the contact area. These measures can effectively improve the contact stiffness.

In order to give full play to the high-efficiency machining capability of CNC machine tools and to enable stable cutting, dynamic stiffness must be improved while maintaining static stiffness. Commonly used measures include increasing the stiffness of the system, increasing the damping, and adjusting the natural frequency of the member. Tests have shown that increasing the damping coefficient is an effective method to improve vibration resistance. The welded structure of the steel plate can increase the static stiffness, reduce the structural weight, and increase the damping of the component itself. Therefore, in recent years, the bed, the column, the beam and the table of the steel plate welded structure have been used on the numerically controlled machine tool. Sealing sand castings are also beneficial for vibration attenuation and have a good effect on improving vibration resistance.

Second, reduce the thermal deformation of the machine tool

Under the influence of internal and external heat sources, different parts of the machine tool will undergo different degrees of thermal deformation, so that the relative motion relationship between the workpiece and the tool is broken, which is also a quarterly decline of the machine tool. For CNC machine tools, the effect of thermal deformation is even more serious because all machining processes are controlled by calculations. In order to reduce thermal deformation, the following measures are usually adopted in the numerical control machine tool structure.

(1) Reduce fever

The main heat source that generates thermal deformation when the machine is inside generates heat, and the heat source should be separated from the host as much as possible.

(2) Control temperature rise

After a series of measures to reduce heat sources, the thermal deformation will be improved. However, it is often difficult or even impossible to completely eliminate the internal and external heat sources of the machine tool. Therefore, temperature rise must be controlled by good heat dissipation and cooling to reduce the effects of heat sources. The more effective method is to forcibly cool the hot part of the machine tool, or to heat the machine at a low temperature part to make the temperature of the machine point uniform, which can reduce the warpage caused by the temperature difference.

(3) Improve machine tool organization

Under the same heat conditions, the machine tool mechanism also has a great influence on the thermal deformation. For example, the single-column mechanism used in CNC machine tools in the past may be replaced by a double-column mechanism. Due to the bilateral symmetry, the main axis of the double-column mechanism is slightly deformed in the other direction except for the vertical direction translation, and the vertical axis movement can be conveniently compensated by a coordinate correction amount.

The thermal deformation of the shaft occurs in the vertical direction in which the tool is cut. This minimizes the effect of thermal deformation of the spindle on the machining diameter. In the structure, the distance between the center of the main shaft and the main axial ground should be reduced as much as possible to reduce the total amount of thermal deformation. At the same time, the front and rear temperature rises of the main shaft box should be consistent to avoid tilting after the deformation of the main shaft.

Rolling screws in CNC machine tools often work under conditions of high expected load, high speed and poor heat dissipation, so the lead screw is prone to heat. The consequences of thermal production of the ball screw are severe, especially in open loop systems, which can cause the feed system to lose positioning accuracy. At present, some machine tools use a pre-tensioning method to reduce the thermal deformation of the lead screw. For the thermal deformation that can not be eliminated by the above measures, the compensation pulse can be corrected by the numerical control system according to the measurement result.

Third, reduce the friction between the movements and eliminate the transmission gap

The displacement of the CNC machine table (or the carriage) is the minimum unit of the eleven pulse, and usually requires movement at the base speed. In order for the workbench to respond accurately to the instructions of the numerical control device, corresponding measures must be taken. At present, there are obvious differences in friction damping characteristics between the sliding guide rails, the rolling guide rails and the hydrostatic guide rails. The same effect can be obtained by replacing the sliding screw with a ball screw in the feed system. At present, CNC machine tools use ball screw drives almost without exception.

The machining accuracy of CNC machine tools (especially CNC machines with open-loop systems) depends to a large extent on the accuracy of the feed chain. In addition to reducing machining errors in the drive and ball screws, another important measure is the use of a gapless drive pair. For the cumulative error of the ball screw pitch, the pulse compensation device is usually used for pitch compensation.

Fourth, improve the life and accuracy of the machine tool

In order to improve the life and accuracy of the machine tool, the wear resistance of CNC airport parts should be fully considered in the design, especially the wear resistance of the main parts that affect the progress, such as the machine guide rails and the feed spindle parts. During use, it should be ensured that all parts of the CNC machine tool are well lubricated.

Fifth, reduce auxiliary time and improve operational performance

In the single-piece machining of CNC machine tools, the auxiliary time (non-chip time) occupies a large proportion. To further increase the productivity of the machine tool, it is necessary to take the initiative to maximize the auxiliary time. At present, many CNC machine tools use multi-spindle, multi-tool holder, and automatic tool changer with tool magazine to reduce tool change time. For CNC machine tools with increased chip usage, the bed mechanism must be good for chip removal.

Use of oblique iron

Steel oblique iron is mainly used for the installation and adjustment of steel structures and the adjustment of equipment installation.

The inclined iron is mainly used in the initial construction period of the power plant. It is used to adjust the parallelism of the steel beam or to be used for the installation and adjustment of mechanical equipment. The installation and adjustment of the machine tool equipment. The equipment adjustment oblique iron (wedge iron): mainly forged iron and fine forgings Processing oblique iron.

The inclined iron is used for parallel and horizontal adjustment of various equipments, so that the equipment does not vibrate and tilt during operation, ensuring that the machine is in a good state during operation, reducing machine wear and saving money and machine parts replacement. .

The performance of the inclined iron is durable, not easily deformed, and can be adjusted by welding.