The rational use of combination and selection tool-2

1.The advantages of a combination tool.

The main advantage of combined cutting tool is to improve production efficiency. Such as the use of 4 step drill, a piston hole processing time shortened about 70%. in addition to the tool change time saving, users can also benefit from the vacated machine tool position and reduce the tool chuck, the knife position vacated can make backup tool replace the machine work. At the same time as the tool to reduce the number, so the tool can simplify the management of cost savings.

A combination tool expensive, technicians believe that in the calculation should be considered due to the decrease of holder and save administrative costs are therefore compensation; a special standard knife combination tool can replace more and more it will be early to be adopted. In addition, in processing quality, combined application of special tool is also advantageously, the positioning precision of the machine tool is not so important, such as a multi step hole in a tool path in machining, hole misalignment error is also reduced, because in front of the bit centering effect on the back of the hole to play. He also pointed out that using a combination of complex machine tool the operator will have the corresponding knowledge, so they should be properly trained.

2.The prospects for the development of a combination tool.

The combined tool structure at present more and more complex to be recognized by the user. To promote the development of the combined tool and expand the scope of use, the tool manufacturers in the development of these tools at the same time, must take into account the problems users encounter, seek solutions, and take various measures and tools including the development of a flexible and controllable, coating technology the development of tool material and geometry, in order to reduce the cost of the tool, or even put the tool production to low manufacturing cost to the production area.

But there are only in the flexible combination tool without changing machine and control system can be smoothly connected or is able to promote the new; combination tool will put each factor associated with processing efficiency, such as base material, coating material, geometry and other factors, should according to the specific processing object to be optimized to form comprehensive advantages at the same time, due to save auxiliary time and improve the utilization degree of these advantages, achieve higher productivity. This to improve the cutting efficiency and reduce the comprehensive application of the auxiliary time trend, will promote the application of the combined tool more widely.

Rational use and selection of combined cutting tools-1

In order to adapt to the manufacturing technology facing the product diversification of higher production efficiency and environmental protection requirements, have appeared in high speed cutting, the new processing technology of dry cutting. The cutting time of high speed cutting technology in machining process is significantly reduced, this is the new tool material and coating of the results of this. On the basis of the further increase of cutting parameters to improve the productivity of the potential is very limited.

Another way is to increase productivity as much as possible to reduce the auxiliary time. First, the delivery time for many before and after the tool change time and process of complex parts processing methods are decomposed into many processes and uses many tools. Reduce the time is of practical significance to improve the productivity. One of them has been proved very effective. The practice is to use the multifunctional combined tool to replace the function of a single standard tool, and the correct selection and reasonable use of the combined tool can achieve the desired effect.

Form of combined cutter

So far, the combination cutter has a variety of forms. The common step drill is a kind of simple combination tool, which is characterized in that a cutting knife in a few processing the same process. The combined tool is complex often integrated several knives can be completed in different process, such as drilling and drilling cutter a combination of milling and cutting is usually divided into several path or in different station in order to complete several knife. This is a combination of the most typical tool, can cover a wide range of processing, both – Chamfer combination knife has simple drilling, the integration of the 5 to 10 knife special combination the tool. And there is a more complex: the combination tool integrated with internal drive mechanism motion assisted cutting or rotating shaft, mechanical and mechanical electronic two, parts can meet the special requirements of the processing parts, such a structure or machine tool on The control system often has special requirements to achieve the control of the movement of the tool parts.

Milling cutters-company info, precision manufacturing

Our company provides processing and service for auto parts, machine parts, and parts, etc. Meanwhile, the team is committed to providing customers with the processing and manufacturing solutions and cutting tools supporting service companies.
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Materials-tungsten mills, high-speed steel mills, hard alloy cutter

With the raw material of tungsten steel milling cutter is made of hard alloy, commonly known as tungsten steel.

High-speed steel mills are made of high-speed steel.

Hard alloy cutter is made of hard alloy round bar is made, with universal CNC tool grinder for grinding wheel for steel processing equipment, processing tools, by computer or G-code editing processing route of manufacturing a molding and processing method, has the high efficiency, high precision, mass production has the advantages of good consistency so, for the shortcomings of most equipment for imported products, the general price of more than 1 million yuan.

here is the use of ordinary processing equipment, divided into slot grinding machining spiral groove end tooth machining end and end after trimming machine (week tooth machine) this week processing tooth, products need to be processed according to various sections separately, the cost of manpower cost is very high, and the quality of mass production the products are skilled workers themselves rely on operating machine to control, so poor in accuracy and consistency.

In addition, the quality of hard alloy milling also depends on the selection of carbide materials brand, usually in accordance with the material to be processed to select alloy grade, in general, the smaller the alloy grain, the better.

Thread milling cutters-function and characteristics 3

end mill

1.Thread spiral drilling cutter

The spiral drilling milling is a kind of solid carbide cutting tools for machining internal thread, one can also produce bottom hole and thread. The tool end is like mills as the cutting edge. The thread of the helix angle is small, so the cutter spiral movement when processing thread end cutting edge firstcutting the workpiece material processing hole, and then by the rear cutter machining threads. Some screw auger cutters with chamfer edge, can be processed simultaneously. The processing efficiency of the orifice chamfering tool is very high, and general than the thread of drilling and milling cutter, cutter machining internal thread diameter range of D ~ 2D .

2.Thread milling tool system

General and efficient thread cutter is one of the prominent contradiction, some have a composite function of tool processing efficiency is high but less common, and often universal tool efficiency is not high. In order to solve this problem, a lot of tool system thread milling tool manufacturers developed a modular. The tool consists of handle, countersinking chamfering edge and common thread cutter. According to the processing requirements to choose different types of countersinking chamfering edge and thread cutter. This tool system has good universality, high processing efficiency, but the tool cost is high.

The above general functions and characteristics of several common thread milling cutter. In milling thread, cooling is also crucial, recommend the use of tools and machines with internal cooling function. Because the tool rotates at a high speed, the centrifugal force under the action of external cooling liquid is not easy to enter. In the cooling mode can well for cooling the tool, which is more important in the processing of blind screw high-pressure coolant helps chip cooling, pressure processing small diameter thread holes especially need higher, to ensure smooth chip removal. In addition, in the selection of thread milling cutter should also consider the specific requirements of the processing, such as mass production, the number of holes the workpiece material, thread precision, size and other factors, a comprehensive selection of tool.

Thread milling cutters-function and characteristics 2

1.general integral thread milling cutter

Integral thread cutter mostly made of solid carbide materials, some also used coating. Integral thread cutter has the advantages of compact structure, is suitable for processing thread, small diameter; but also for the whole process of taper thread type thread milling cutters. This kind of tool is of good rigidity, especially the type thread milling cutters with spiral groove, in the processing of high hardness materials can effectively reduce the cutting load, improve processing efficiency. The cutting edge integral type thread milling cutter with thread cutting teeth, along the spiral machining a week to complete the entire thread processing, without a clamping tool that hierarchical processing, so the processing efficiency is high, but the price is relatively expensive

2.integral thread milling cutter with chamfering function

The overall structure of the thread cutter with chamfer function and whole thread cutter is similar, but there are special chamfer edge of the cutting edge of the root, can be processed at the end of the thread chamfer processing thread at the same time. There are 3 ways of chamfering, when the cutter diameter is large enough, can directly use a chamfer chamfer edge countersink and this method is only limited to the internal thread processing. When the orifice chamfering tool diameter is small, can be used by circular motion to chamfer edge chamfering. But in the use of root cutting edge chamfer edge chamfering process, should pay attention to the tool thread cutting part and the thread should have a certain gap, in order to avoid the interference phenomenon such as effective cutting length. Depth of thread machining is smaller than that of the tool, the tool will not be able to achieve the chamfering, therefore cutting tool choice should ensure that the effective cutting length and depth of thread matched with each other.

Thread milling cutters-function and characteristics 1

With the popularity of CNC machine tools, machining thread milling technology is more and more used in mechanical manufacturing industry. Thread milling is through three axis CNC machine tools, the use of thread milling spiral milling interpolation and the formation of thread cutter in the horizontal plane for each circular motion in a vertical plane, linearly moves a pitch. Thread milling has high processing efficiency, high quality thread cutter, good versatility, the advantages of processing and good safety.

At present, there are many kinds of thread milling tools. This paper analyzes the common thread milling cutter from the application characteristics, tool structure, processing technology and so on:

Ordinary machine clamp thread milling cutter

Machine clamp type thread milling tool is the most commonly used thread milling and the price is low, and the structure of ordinary machine clamp type milling cutter is similar to that by reusable tool bar and easily replaceable blades. If the machining of taper thread, special cutter can also be processed by cone screw rod and blade, the blade a plurality of thread cutting teeth, along the spiral machining tool can be processed once a week from multiple threads, such as milling cutter with a 5 2mm thread cutting tooth, tooth thread along the spiral machining a week can be processed with 5 thread depth 10mm.

In order to further improve the efficiency of processing, can choose the multi blade clamping thread cutter. By increasing the number of cutting edges, can significantly improve the feed rate, radial and axial positioning error between each blade but distributed on the circumference of the will affect the accuracy of thread processing. Such as screw thread milling processing of multi precision clamping edge machine does not meet, try to be installed only one blade for processing. In the selection of machine clamp type thread milling cutters, should to be processed according to the diameter of the thread, depth and workpiece materials, try to choose the larger diameter cutter and appropriate blade material. The depth of processing thread clamping thread milling cutter is determined by the effective depth of cutting tool bar due to the effective depth of cutting blade is smaller than the length of cutter, so when machining thread depth is greater than the blade length need hierarchical processing.

Tool selection -3

The influence of tool material, tool holder, tool structure and tool cost on tool selection is introduced. The selection of cutting tools, the method of machining and the tool supplier are also considered.

1.process method

In order to give full play to the role of high efficiency flexible wire cutter, put forward many new requirements for the process, such as a tool to consider with more complete processing different processes on the same workpiece, to reduce the tool inventory, tool change frequency limit, reduce the manufacturing cost; at the same time, but also for some technical difficulties, special the tool design, tool or a smart composite tool, in order to solve the problem of machining precision and efficiency.

2.tool suppliers

To determine the tool selection including tool suppliers. Because machining is a system problem, process changes, machine tool, fixture, cutting fluid, has a significant impact on the tool life cutting parameters, tool structure influences the machining performance of the cutting tool material, cutting parameters and process. Determination of surface coating, cutting fluid is closely connected. The tool must go through the cutting test after cutting tests on the tool and supplier selection; at the same time, the modern automobile manufacturing industry also requires the cutting tool supplier can not only provide the overall solution, and can provide timely and effective on-site technical support, and the formation of automobile manufacturing a business partnership.

Tool selection -2

In addition to the material of the cutter, the tool selection, the tool shank, the structure, the method and the cost are also included.

1.tool shank

The knife handle with the increase of the cutting speed, the spindle / toolholder interface performance under the influence of centrifugal force changes directly affect the machining accuracy of the workpiece and the surface roughness, therefore, to adapt to the connector tool to the NC machine tool and machining clamp and machine tools, such as HSK heat sleeve handle, handle, handle hydraulic and other new tool has been widely used.

2.tool structure

In order to improve production efficiency and reduce tool change time, the auto parts processing, the increasing use of a variety of composite tools, such as drilling and boring and reaming composite, composite, composite drill and thread processing etc. The complex structure of the expansion tool to meet a lot of special processing requirements, and even some tool the development of a machine, electrical, hydraulic integration device, has been far beyond the traditional concept of the tool; because the powertrain uses a lot of processing in the production procedure, production directly affects the working procedure of the production, in order to improve production efficiency and reduce production cost, and uses the combined tool a large number of and the resulting non-standard cutting tools.

3.tool cost

The tool consumption is related to many factors, requires specific conditions. In general the tool cost at the same time, more important is to see the cost of a single product processing tool consumption. Not only to see the tool cost directly, but also depends on the tool influence on production efficiency and changes of the total manufacturing cost caused by the the performance of the new knife. The life and influence on the purchase price of the tooling cost is very large, while the number of heavy grinding tools, heavy grinding times and grinding costs, the total cost of the tool also has a significant impact; therefore, the need to consider the time of equipment and tool of investment and long-term consumption of tool the relationship between costs, need to consider and balance.

Tool selection -1

In order to ensure the efficiency of equipment and production line processing cycle balancing, we need to consider the appropriate tool and production line equipment in the match. Therefore, tool selection is reasonable or not will directly affect the quality and efficiency of processing, therefore, should choose the tool of the following aspects:

1.processing equipment

The first is to understand the performance of processing equipment, only to understand the performance of the equipment, or to choose the appropriate tools to match, whether individually selected equipment or tool, its efficiency can play out. In recent years relevant data show that the value of a few million end mills, may affect a value of millions yuan of equipment efficiency. In the process of planning, design and arrangement of the tool determines the cost of manufacturing stage and tool cost to a great extent.

2.tool material

The high-speed development of manufacturing technology, the cutting tool of the increasingly high demand. In order to meet the needs of high-speed cutting tools, new materials have been widely used. The use of new materials to greatly improve the efficiency of cutting tool, high cobalt, high vanadium, high performance, high speed steel tool durability can be increased by 1.5-3 times than the ordinary high speed steel, the powder metallurgy high speed steel strength can improve toughness of 20%-30%, increased 1.5-2 times, and reliability than ordinary high speed steel increased significantly, while the CBN (cubic boron nitride), PCD (polycrystalline diamond tool) and ceramic tools represent the development level of the technology of superhard cutting tool, cutting speed can be increased several times than the hard alloy. Greatly improve the processing efficiency.