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What role does metal cutting fluid play in deep hole machining

Lubrication

The lubrication function of metal cutting fluid (cutting fluid) in the cutting process can reduce the friction between the front cutter face and the chip, and between the back cutter face and the machined surface, forming part of the lubricating film, so as to reduce the cutting force, friction and power consumption, reduce the surface temperature and tool wear of the friction part between the cutter and the workpiece blank, and improve the cutting performance of the workpiece material for deep hole machining 。 In the process of grinding, after adding grinding fluid, the grinding fluid infiltrates into the abrasive grains of the grinding wheel, the workpiece and the abrasive grains to form a lubricating film, which reduces the friction between the interfaces, prevents the abrasive cutting edge from wearing and adhering to the chips, thus reducing the grinding force and friction heat, and improves the durability of the grinding wheel and the surface quality of the workpiece.

Cooling action

The cooling function of cutting fluid is to take the cutting heat away from the cutter and workpiece through the convection and vaporization between it and the cutter (or grinding wheel), chip and workpiece, so as to effectively reduce the cutting temperature, reduce the thermal deformation of workpiece and cutter, maintain the hardness of cutter, and improve the machining accuracy and tool durability. The cooling performance of cutting fluid is related to its thermal conductivity, specific heat, heat of vaporization and viscosity (or fluidity). The thermal conductivity and specific heat of water are higher than that of oil, so the cooling performance of water is better than that of oil.

Cleaning function

Deep hole machining in the metal cutting process, the cutting fluid is required to have a good role in cleaning. Remove the generated chips, grinding chips, iron powder, oil and sand particles, prevent the contamination of the machine tool, workpiece and cutter, keep the cutting edge of the cutter or grinding wheel sharp and do not affect the cutting effect. For oil-based cutting oil, the lower the viscosity, the stronger the cleaning ability, especially for cutting oil containing kerosene, diesel oil and other light components, the better the permeability and cleaning performance. The water-based cutting fluid containing surfactant has a good cleaning effect because it can form an adsorption film on the surface, prevent particles and sludge from adhering to the workpiece, cutter and grinding wheel, at the same time, it can penetrate into the interface of particles and sludge, separate it from the interface, take it away with the cutting fluid, and keep the cutting fluid clean.

Antirust effect

In the process of metal cutting, the workpiece should be corroded by contacting with corrosive media such as environmental media and oil mud produced by decomposition or oxidation of cutting fluid components, and the surface of machine tool parts contacting with cutting fluid will also be corroded. In addition, when the workpiece is temporarily stored after processing or in the process of flow between processes, the cutting fluid is also required to have a certain anti rust ability to prevent corrosive substances such as environmental medium and oil mud in the residual cutting fluid from eroding the metal. Especially in the wet and rainy seasons in the south of China, more attention should be paid to the rust prevention measures between processes.

Five excellent performances in practical application of deep hole drilling machine

Deep hole drilling machine is different from the traditional way of hole processing. It mainly relies on specific drilling technology (such as gun drill, BTA drill, spray drill, etc.), and the special machine for drilling deep hole system and precision shallow hole with length diameter ratio greater than 10 is called deep hole drilling machine.

Deep hole drilling machine has the following five characteristics in practical application:

1. The whole casting adopts high-quality mihanna cast iron, and after aging treatment, the structure of the casting is uniform and stable, with high rigidity and good stability.

2. Three coordinate deep hole drilling machine adopts imported high rigidity and high precision screw rod, which provides more powerful torque and durability during processing.

3. High quality servo motor and driver are used in the three-axis feed drive, which are directly connected with the ball screw. The transmission is stable and has no backlash. At the same time, its good rigidity and optimized shock absorption performance greatly improve the dynamic rigidity of the transmission system, which can realize rapid movement.

4. The spindle adopts powerful motor, which can meet the processing requirements of high and low speed, and is equipped with automatic oil cooling system to ensure constant temperature during processing.

5. The operating system adopts Taiwan system, which can be compatible with CAD / CAM software to use more metadata.

How to maintain the deep hole drilling machine

Compared with the traditional drilling machine, the deep hole drilling machine has made great progress in efficiency and quality. Especially combined with special processing technology, the application of deep hole drilling machine makes more and more industries taste the sweetness. Deep hole drilling machine is a kind of special machine tool with high precision, high efficiency and high automation for deep hole processing. Relying on advanced hole processing skills (gun drilling, BTA drilling, spray suction drilling, etc.), it can reach the processing accuracy and surface roughness which are usually achieved by drilling, expanding and reaming processes after one successive drilling. The application of deep hole drilling machine reduces the cost of labor to a great extent, and makes the original tedious work more simple and convenient. Moreover, the fully mechanized control workflow also makes the deep hole drilling machine much better than the manual participation in the accuracy. After all, it is a kind of work that needs to be repeated constantly. When there is always a human error, the deep hole drilling machine also reduces the possibility of this kind of error to the minimum.

How to maintain the deep hole drilling machine? Pay attention to the following points:

1. Take good care of the deep hole drilling machine, adhere to the regular appearance of the deep hole drilling machine and accessories, and clean them.

2. Tools, tools and fixtures shall be placed in order. Deep hole drilling machine

3. The door switch, anti-collision switch and other safety maintenance devices in the operation room of the deep hole drilling machine shall be put into use normally and shall not be dismantled at will.

4. Before connecting the power switch of the electric cabinet, check whether the output voltage of the voltage regulator is 380V and whether the three phases are balanced. If there is any abnormality, do not connect the power of the machine tool

5. It is required to run warm-up program before drilling every day. If necessary, it is required to move each axis of the machine tool 3-5 times to smooth the guide rail

6. Check the smooth oil level every day, make up in time, and use iso68 guide rail smooth oil

7. Go to work every day and observe whether there is any oil leakage on the ground

8. Check whether the pressure of the hydraulic station is normal once a week. The pressure is 2MPa

9. Check the oil level of the cooling oil tank once a week and check whether the filter paper is sufficient. Pay attention to make up for 10. Clean the dust on the back cover of the motor, the air conditioner of the electric cabinet and the protective net of the refrigerator every two months. 11. Regularly clean the impurities deposited in the cooling oil return tank. Pay attention to observe the oil pressure at the outlet of the return pump. 12. Regularly change the oil to the protective cover of the machine tool to avoid embroidery and excessive collision

13. At least once in half a year, the maintenance of large deep hole drilling machine shall be carried out, including checking whether the guide rail is worn, whether the motor sound is abnormal, whether the function of limit maintenance and anti-collision switch of deep hole drilling machine is normal, whether some moving cables are worn, whether there are dust and other abnormalities in the main electric cabinet, whether the external control circuit is completely normal (such as oil level, oil circuit control Function), whether the oil circuit joint is loose, whether the balance chain is loose, etc. Do not use lint (head) cotton when scrubbing guide rail

How to adjust the accuracy of deep hole drilling machine?

The adjustment contents and methods of geometric accuracy in the application of deep hole drilling machine are as follows:

1. The adjustment of sizing block and anchor bolt is mainly to adjust the geometric accuracy of the machine tool through sizing block and anchor bolt. If necessary, the accuracy requirements can be achieved by slightly changing the inlay and pre tightening roller on the guide rail.

2. Adjust the relative position between the manipulator, the spindle and the tool magazine, so that the machine tool can automatically run to the tool change position, and complete the tool exchange action step by step in a manual way, and check whether the actions such as grabbing, loading, pulling and rotating exchange are accurate and stable.

3. Adjust the relative position of the pallet and the exchange worktable. This kind of machine tool is double worktable or multi worktable. Adjust the relative position of the pallet and the exchange worktable to ensure the stable and reliable automatic exchange of the worktable.

The application scope of deep hole drilling machine mainly includes the following three aspects:

1. Parts that are not easy to be machined on general machine tools, or need to be equipped with complex special clamps on general machine tools and need a long adjustment time to be machined;

2. For the parts that need to be produced in small batch and multiple batches (generally less than 100 pieces), the mold parts with complex contour and shape, high machining accuracy requirements or complex curves and surfaces that must be solved by digital methods, and the parts that need to be remodeled for many times;

3. It is a high-value precision part that needs to be processed by many processes such as boring, milling, drilling, expanding, reaming, spot facer and tapping thread, and can be clamped once

Automotive Aftermarket for Brake Components Market Insights on Current Scope 2029

Fact.MR, in its latest business intelligence study, depicts the nuts and bolts of the global Automotive Aftermarket for Brake Components market. The Automotive Aftermarket for Brake Components report presents detailed information regarding the drivers, restraints, opportunities and trends affecting market growth. Each segment alongwith its sub-segment is analyzed in terms of value and volume. Further, the Automotive Aftermarket for Brake Components report elaborates the market behavior of each vendor operating in the Automotive Aftermarket for Brake Components market.

The Automotive Aftermarket for Brake Components report considers the following years to present the overall market growth:

History Year: 2014 – 2018
Base Year: 2018
Estimated Year: 2019
Forecast Year: 2019 – 2029

Key findings of the Automotive Aftermarket for Brake Components market study:

Regional breakdown of the Automotive Aftermarket for Brake Components market based on predefined taxonomy.
Innovative manufacturing processes implemented by Automotive Aftermarket for Brake Components vendors in detail.
Region-wise and country-wise fragmentation of the Automotive Aftermarket for Brake Components market to grasp the revenue, and growth outlook in these areas.
Changing preferences among consumers across various regions and countries.
Factors (Positive and Negative) impacting the growth of the global Automotive Aftermarket for Brake Components market.

Global Automotive Aftermarket for Brake Components Market Segmentation

Automotive aftermarket for brake components market can be segmented on the basis of vehicle type, by product type and sales channel. On the basis of vehicle type, brake components can be segmented into passenger vehicle and commercial vehicles. On the basis of product type, brake components can be segmented into brake pads, brake rotors, brake discs, brake drums, brake hoses and brake caliper. On the basis of sales channel, brake components can be segmented into OES and IAM. Geographically, the global market for the brake components market can be segmented into seven regions, namely North America, Latin America, Europe, CIS & Russia, APEJ, Japan, and MEA.

On the basis of region, the Automotive Aftermarket for Brake Components market study contains:

North America (U.S., Canada)
Latin America (Mexico, Brazil, Argentina, Chile, Peru)
Europe (Germany, Italy, France, U.K, Spain, BENELUX, Nordic, Eastern Europe)
CIS and Russia
Asia-Pacific (China, India, ASEAN, South Korea)
Japan
Middle East and Africa (GCC Countries, South Africa, Turkey, Iran, Israel)

Key players analyzed in the Automotive Aftermarket for Brake Components market study:

Akebono Brake Industry
Brake Parts Inc. LLC.
Brembo S.p.A.
CARDONE Industries
Continental AG
APC Automotive Technologies
ZF Friedrichshafen AG
Federal-Mogul Motorparts LLC.
MAT Holding, Inc.
Power Stop LLC.

Queries addressed in the Automotive Aftermarket for Brake Components market report:

How has the global Automotive Aftermarket for Brake Components market grown over the historic period of 2014-2018?
Why are the Automotive Aftermarket for Brake Components market players targeting region for increased product sales?
What patented technologies are the players utilizing in the global Automotive Aftermarket for Brake Components market?
Which regions are displaying the fastest growth in the Automotive Aftermarket for Brake Components market?
What are the underlying micro- macroeconomic factors affecting the global Automotive Aftermarket for Brake Components market?

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Realize the compensation function of cutter in CNC machining

When CNC machining is carried out in CNC machining center, due to tool wear, regrinding or replacement of new tools, the parameters of related tools in the programmed machining program will be changed, and the tool running path will be changed. If the adjustment is not enough, the final machining accuracy of the workpiece will be affected. For example, calculate the tool path from the beginning, and correct the program. In this way, it is not only time-consuming and laborious, but also has a high error rate. The most convenient way is to call the tool radius compensation performance of CNC system. When programming the workpiece, we only need to prepare the processing program according to the appearance of the workpiece. The system will automatically calculate the tool center path, so that the tool deviates from the appearance of the workpiece by a radius value. Even if the tool parameters are changed, only the detailed tool parameters need to be changed without changing the whole machining program. This greatly improves the machining efficiency of the machining center.

1、 Establishment and revocation of tool radius compensation

In short, tool radius compensation can be divided into left compensation and right compensation. Farewell is defined by G41 and G42. When the tool center track is located on the right side of the part appearance, it is called the tool radius right compensation; otherwise, it is called the tool radius left compensation.

1. The establishment of tool radius compensation

The establishment of tool radius compensation is a process that the tool center track changes from coincide with the programmed path to deviate from a tool radius value with the programmed path when the tool approaches the workpiece at the feed speed from the starting point. G41 is responsible for the left compensation of tool radius; G42 is responsible for the right compensation of tool radius.

2. Cancellation of tool radius compensation

The cancellation of tool radius compensation is the same as the process of creating tool radius compensation. After the final section of tool radius compensation path of the workpiece is processed, the tool withdraws the workpiece and returns to the withdrawal point. In this process, the tool radius compensation should be cancelled, and its instructions are defined by G40. The undercut point shall also be located outside the part appearance, and the undercut point of the parts machined at intervals shall be close to the undercut point, which may be the same as the undercut point, and of course may not be the same.

2、 Concerns in CNC machining tool radius compensation input

The change of tool radius compensation usually occurs after machining in machining center for a period of time. For a continuous program segment, when the tool radius compensation amount changes, the vector at the end of a program segment needs to be calculated with the tool compensation amount specified in the program segment.

In the process of NC programming, we usually input the compensation amount of the tool radius into the compensation code as a positive value. If the compensation amount of the tool radius is set as a negative value, under the condition that the target of the tool path is fixed, it is equivalent to exchanging the compensation position command in the NC program, G41 and G42. It is possible that the processing center originally processed the outside of the workpiece into the inside plus There are some unexpected problems, so we must pay attention to the configuration of two compensation targets when inputting radius compensation.

报错

What kind of performance should the cutter have in CNC parts processing factory

There are few articles about the use of cutting tools in CNC parts machining field. Today, I will introduce some basic functions that the cutting tools in machining center should have. The material used to make the cutting tool will directly affect the service life, processing efficiency, processing quality and processing cost of the cutting tool, which shows how important it is to select the cutting tool for the machining center. In the process of machining, the tool must receive high pressure, high temperature, conflict, impact and vibration. So the tool used in the machining center must have the following basic functions.

1. Before machining the workpiece in our machining center, we must know the hardness of the workpiece. Generally speaking, the hardness of the tool used must be higher than that of the workpiece processed. Otherwise, it is not the tool that is processing the workpiece, but the workpiece is processing the tool. The hardness of the tool is usually above 60HRC. Originally speaking, the higher the hardness of the tool, the better its wear resistance, the more permanent.

2. The tool used in the strength and toughness machining center must have the strength to receive cutting force, impact force and detonation force, otherwise it will cause tool fracture or collapse, so to meet these requirements, it is necessary to select high light and high toughness raw materials to manufacture the tool.

3. High temperature machining center will produce certain high temperature when processing the workpiece. In order not to affect the machining accuracy, the material with good heat resistance must be selected to make the cutter. The cutter must be able to receive the high temperature produced by the machining center when processing the workpiece, otherwise it will cause high temperature oxidation of the workpiece or cutter, so the cutter must have heat resistance, so that the cutter can have anti-oxidation strength. 4. Process function: the material of cutting tool must have forging function, heat treatment function, welding function and other process functions, so as to facilitate the running in and change of cutting tool.

Fixture design of tooling and accessories

The basic goal of using the equipment is to increase the production rate of the product parts, achieve better economic benefits, and ensure the safety and stability of the product parts and meet the technical requirements. Therefore, the design of equipment accessories is not only a technical problem, but also an economic problem. In the design of accessories, it is necessary to carry out necessary technical and economic analysis to make the designed accessories obtain better economic benefits.

Know the technical requirements of product parts

After taking over the design mission of the letter of acceptance, necessary raw materials shall be prepared to design the accessories, including the design drawings and drawings of film and technology requirements, process specification, processing equipment associated with the process and other information. After understanding the product parts, dimensional accuracy yamen, mode and other technical requirements, and looking for the key points of the parts and the basic structure of the important dimensions (the size must be guaranteed), the design of the parts is basically confirmed.

Some important parts design plans should be discussed and completely revised before affirmation. At the beginning and the end of this method, it is a better design and processing plan to ensure that the equipment design can meet the requirements of the production plan.

Position reference in positive attachment

With respect to each group of equipment, the size of key parts and important parts must be used as positioning pieces (design positions) in accessories, and the design (precision design) positioning of dreams must be confirmed to confirm the reference key positioning (first reference point). ）And auxiliary positioning reference point (second reference point).

In principle, the first reference point must be the same as the design. If it can not be guaranteed, it is advisable to convert the design basis to process basis through calculation, but the design basis requirements must be guaranteed.

There must be two conditions for selecting a location reference:

The process reference should be selected as the positioning reference to complete the reference matching and reduce the positioning deviation;

Therefore, the average positioning datum should be selected not only to ensure the quality of components and improve the processing efficiency, but also to simplify the structure of accessories (usually using reference holes and positioning shafts).

For example, when designing fixture, the designer must first look at the design of positioning reference drawing from the beginning to the end of positioning reference, and then see that the processing of positioning reference is confirmed (still confirm the process specification). If the positioning reference point is general. If they are not all, the basic design becomes the reference point of the whole calculation process, but the requirements of the design reference point must be guaranteed.

When the designed components are positioned, the basic technical requirements are: good precision, good wear resistance, sufficient strength and rigidity, good processing strength, simple disassembly and other characteristics. For example, the selection of the positioning part of the welding device used for assembling components must be in the positioning mode of the positioning pin according to the requirements; there must be a certain space between the positioning pin and the reference hole of the workpiece, and the size depends on the accuracy of the hole of the workpiece, and it cannot be artificial. The locating pin is fastened by yamen service pin, while the locating pin of 45 × steel and alloy steel Cr12 must have sufficient strength and rigidity through quenching, tempering and heat treatment cooling to improve wear resistance and prolong service life

Structure design of equipment and design of 2-3 parts

Once these parts are placed in the equipment, they are usually fastened so that the parts remain in the process of being processed without being damaged. In the process of machining, workpiece will occur, displacement deformation and vibration, which will affect the machining quality of workpiece.

Therefore, the fastening of parts is also a very important problem to ensure the machining accuracy. In order to achieve good machining efficiency, it is necessary to control the displacement and vibration of parts in machining time within the boundary of machining accuracy. As a result, the handling of the fastening problem of accessories is sometimes more troublesome than the positioning design, and the problem should not be ignored.

Design and affirmation of clamping organization

After the selected connection point is confirmed, the clamping force is designed, the clamping organization is determined and the force exerted by the specific organization is maintained. In general, the clamp system is composed of, power supply and transmission mechanism.

The clamping structure refers to a perfect structure that can implement the clamping of the parts selected at the maintenance point to confirm the performance of the clamping force, and the key point includes that the force applied is a plate, pressure and structure related to the component.

The use mechanism of clamping force can select floating structure and self-locking link,,, with the following four modes:

The fastening structure of bolt and nut: simple structure, simple manufacturing, clamping line width, good self-locking performance, has been used in ordinary;

Application organization of skew force: applicable to large clamping force and small stroke, mainly based on pneumatic and hydraulic power;

Eccentric force application organization: simple structure, fast behavior, but small pressure, mainly used for small parts of accessories;

Push button organization: simple structure, large force ratio, used in pneumatic fixture, reduce the strength of cylinder or air chamber, and get ordinary use.

Careful economy and joint cooperation of parts

The key goal of using accessories is to ensure the quality of works. In detail, when using accessories, ensure the accuracy of dimension (form) and position accuracy of components. Machining deviation of parts completely reflects the deviation of process system, and accessory deviation is the key deviation component of machining deviation. Equipment error is divided into two parts: static error and dynamic error, in which static error represents an important proportion.

Finishing technology of free grinding tool for precision machine parts

Today’s precision parts processing for you to understand the fine mechanical parts free grinding tools finishing technology, together with it.

In the process of precision parts processing, it is necessary to deburr every part. In the process of deburring, file, sandpaper, etc. are used to remove the burr of sophisticated mechanical parts. With the continuous development of modern science and technology, it is still difficult to use human deburring methods to meet the needs of society. Therefore, the new finishing technology is born.

This technology is still used by some large-scale enterprises for surface finishing of carefully machined parts, which is also incorporated into the process by the technical staff, and a standard process is still gradually built. For all kinds of machining techniques, such as turning, milling, forging, stamping, etc., there is no one that will bring certain trace on the surface of carefully machined spare parts, with the emphasis on: rough surface, burr, crack, etc., which will have a positive impact on the normal use of parts, making the quality and quality of parts The index of appearance index is reduced. This processing technique is introduced below.

Free grinding tool finishing technology. With regard to the rolling and polishing process, the processed and meticulous mechanical parts are placed in the roller of the medium, that is, the grinding block and grinding agent are included. Following the complicated relative activities, the free grinding block and grinding agent are gradually colliding, rolling and micro grinding the surface of the parts under the certain pressure, so that the rough surface is continuously refined, so as to enter the detailed mechanical parts After finishing, improve the surface physics and mechanical function, and improve the quality and use function of the machined surface of the meticulous mechanical parts. After selecting a piece of equipment, confirm the abrasives used according to the raw materials and use requirements of the finished parts, as well as the parameters of the appropriate abrasives and grinding blocks, including the variety, loading number and inclusion ratio.

The so-called inclusion ratio refers to the proportion of inclusion grinding block, grinding agent, water and workpiece, processing time, etc. The form, size, size, surface particle size, material ratio, sintering hardness of the grinding block, etc. only in this way can the effect of finishing become more and more dream. In the process of finishing, the off plan is often used. Generally speaking, in the process of finishing, ensure that the grinding block parts, i.e. each polished mechanical parts processing is included nearby, and the raw materials of the polished parts, i.e. steel, copper, aluminum, stainless steel, etc., are classified according to the requirements. The grinding agents of different varieties are required for the different parts raw materials.