Choosing the best cutting tool is to ensure the success of a key work , but also a need to repeatedly perform regular work , it directly affects the competitiveness of the processing cycle time and processing plant .
A typical supermarket usually have a stock 48,750 units (SKU), and 35 different canned beans. Now imagine a major tool manufacturers tool products , just inch sizes varieties and specifications on more than 40,000 stock units ( like the same kinds of beans , canned supermarket ) . Single volume terms, compared with choosing the best tools, the best selection of canned beans is simply a piece of cake ! Select the tool is to pick out the match with machine tools and machining can in the shortest cycle time , at the lowest cost and highest quality cutting tool of the part feature . Here are some key factors when selecting a metal cutting tool needs to be considered .
( 1 ) The most important tool
If any kind of tool to stop working , production will come to a halt . But that does not mean that it should be the same for each tool are concerned . Longest cutting tool will have the greatest impact on the processing cycle time , and therefore , under normal circumstances , the maximum degree of importance and should be of such a tool . Also need extra attention to those important parts machining characteristics and dimensions of the highest precision tool . In addition , for those who are most likely to produce difficult to control the chip tool ( such as drilling, grooving and threading tool ) , also need to be given more attention, because it is not likely to cause processing chips ideal standstill .
( 2 ) to match with the processing machine
The tool is divided into left and right cutter knives, therefore , the right choice is very important tool in the right hand . Typically, the right tool applicable to the operation of the machine tool spindle counterclockwise , while the left hand tool suitable for machine spindle clockwise operation . If you have several lathes – some of which tool to use his left hand , while others use both hand tools, tool can also use the left hand – left hand tool should be used . For milling , most people tend to choose large tool overhang . Although a large overhang cutter can cover a larger part machining range, but this option will reduce the rigidity of the tool , the tool deflection increases , reduce cutting speed , and more prone to flutter . Also note that the machine gripper size and weight of the tool has some limitations. If you choose coolant through spindle cooling machine tools, cutting tools should be used with the same cooling function .
( 3 ) matches the material of the workpiece
Processed material to steel majority, therefore , most of the tools are designed to better processing of steel . The choice depends on the tool grade material to be cut . For a variety of non- ferrous materials – such as high-temperature alloys, titanium , aluminum , composites , plastics, pure metals – tool manufacturers design and manufacture a series of tools and supporting chuck blade geometry. If you are cutting these materials , it is necessary to understand for the processing of these materials and specially designed tool -related information.
Size ( 4 ) of the tool
Select a tool often mistakes are: selected small turning , milling too . Large turning rigid better ; while large size milling prices are more expensive , and you want to spend more time on the air cutting . In general, the larger the size of the tool , its cost is also higher.
( 5 ) Select indexable cutting tool or tool can be reground
For this question, the answer is simple: try to avoid sharpening knives. In addition to some of the drills , end mills and a few other exceptions , you should use a blade or indexable tool ( in the case of supply situation ) . Compared with the re- grinding tools , indexable cutting tool can save labor costs and more reliable , more consistent processing results.
( 6 ) tool material and grades
Tool material and workpiece material selection and grades as well as the machine speed and feed rate limits are closely related. For a certain type of workpiece material , you should choose the best tool versatility grades ( most likely some kind of coated grades ) . Grades tool manufacturers can use to select a chart prepared . A common mistake is to use some kind of grades tool life control charts to solve the problem . If you use the tool life is not ideal , and you choose the most similar to their grades , may get as bad machining results . Problem solving tool life need to focus its failure modes.
( 7 ) Power Requirements
The guiding principle is ” the best use .” If you bought a 20 -horsepower machine , you should choose to use 80% of its effective power tools and cutting parameters ( in the workpiece and fixture permitting ) . Pay particular attention to the machine ‘s user manual for power / speed tables. Selected for optimal cutting in the range of the effective power of the machine tool design .
Number ( 8 ) of the cutting edge
The answer to this question is ” the more the better .” Typically , increasing the number of double cutting edge tools , the cost is not increased twice . In the past decade, grooving, cutting blades and some milling insert design has been greatly improved , the number of cutting edges per blade than doubled . Cases replaced with new cutter film with up to 16 of the cutting edge of the cutting edge of only four pieces of traditional milling uncommon . The number of effective teeth has a direct impact on the feed rate and the productivity of the machine table .
( 9 ) to select a single -piece design is modular structure
The tool most suitable for small single-piece design, the tool is more suitable to select a larger modular design . When a large tool failure , users want to replace the parts are relatively small , the cheapest components for grooving and boring tools in particular.
( 10 ) to choose a single or multi-purpose tool use tool
Generally, the smaller the piece quantities , more suitable for processing with multi-functional composite tool . For example , a composite tool to complete the drilling, turning , boring, threading , chamfering , and other cutting functions. In addition, the work more complex and versatile tool suitable for processing . A machine only when the cutting tool in order to create effective, and therefore should minimize tool changes and other auxiliary work .
( 11 ) Select standard tool or special tools
With the popularity of CNC machining , it is generally believed that the shape of the part can be programmed through the process – instead of tool design – to achieve, which means the use of special tools will be less and less. Today, however, there are still about 15 % of the bulk processing tool is a dedicated tool . The reason is that , special tools required to achieve accurate dimensions , and save processing time reduction step . If you need large quantities of machined parts , special tools can be considered a potential advantage in shortening the processing cycle time have. With on-demand development of production technology , the gap between the standard tools and special tools in the tool costs and delivery time is gradually narrowing.
( 12 ) chip control
Must keep in mind that your goal is to manufacture parts , rather than the production of chips . Obviously , the chip can reflect the state of the tool cutting , but in general, people tend to have a bias against chips , because most people have not received training in reading the chip . Guidelines should pay attention to this one : “good” does not interfere with processing chips , while the “bad ” chip will interfere with processing. According to the cutting blade has a feed rate – light load finishing to heavy roughing – designed chipbreakers and chip sets . The smaller the chip , the more difficult breaker . Good toughness when machining the workpiece material , chip control more difficult. Although you can not change the properties of the material , but you can change the selected tool , cutting speed , feed rate , depth of cut , nose radius and so on.
( 13 ) Processing Program
Once the tool , workpiece and CNC machine tools , we need to define the tool path. If you understand the basic machine coding methods and advanced CAM software packages , preparation of the tool path is not difficult. When programming , we must consider the tool features ( such as slope angle , cutting direction , feed rate and cutting speed ) . For each metal cutting tools , there can shorten the processing cycle times , improved chip control and reduce the cutting force of various programming techniques. The use of advanced CAM programming software package can significantly reduce the workload and improve programming efficiency .
( 14 ) to select the commercialization of new and innovative tool or mature tool
At the current rate of progress , the productivity of the cutting tool will double approximately every ten years . If you look at the use of the tool recommended a decade ago , you will find , chip removal tool now has doubled the speed , while reducing power consumption by 30 %. Most of the new tool with the strength and toughness of cemented carbide grades made ​​better , higher cutting speeds can be used , a smaller cutting force . The new tool has a more efficient chip breaker , insert grades for lower processing type of sensitivity , better versatility. The new tools are more versatile and modular – these two trends will help reduce inventory requirements and expand processing capacity. For a number of new processing methods – such as plunging , high-feed milling, high speed machining , minimum quantity lubrication (MQL), hard turning , etc. – Development tools abound. For these reasons and some other reasons , you need to advance with the times , the use of best practices , tools to keep up with the latest developments and technology, or you have stale dangerous outdated .
( 15 ) Tool Price
The price of the tool is important, but it is far from an important tool for processing costs . Price is the money you pay for the tool itself , but the real cost of the tool is a function of its productivity. Cheapest tool is also often the most costly machining tool . Tool prices are usually only 3% of the total cost of machining parts . Therefore, we should focus on the productivity of the tool , rather than its purchase price.
( 16 ) on-site technical support
In the United States , there are about 4,000 trained factory tool specialists. They can access hundreds of processing plant, processing personnel to help in the efficient processing of various parts of different combinations of materials and tools . Machining is becoming an exact science , but it can not completely replace the role of experience . As an additional condition of the sale of the tool , the tool specialist services are free, they might even provide some tools, free cutting tests. An experienced factory tool experts can provide the best tool for the user to select , often help instructive .
Each metal cutting has its own unique challenges in the process of selecting the tool must be carefully considered. Because even within the same brand tool , you can also have a variety of options for different tools , so sometimes tool selection may be a tricky task . To help the user select a tool , a number of tool manufacturers offer a variety of forms of complementary measures , such as color-coded packaging , tool selection chart , processing technology guide, as well as computer-based tool selection software program.
When you select the tool , remember from all possible alternatives screening , do not select the range confined to those familiar tools. To do this , we need to continue to expand the knowledge of new tools and extensive understanding of the various tools of information as possible. In order to make their own times, you can keep up with the tool manufacturer or distributor representative to obtain the latest tool or product sample CD , visit the exhibition associated with the tool , read the magazine industry , participate in technical training courses and seminars tool , frequently visited the tool manufacturer ‘s corporate website, subscribe to the tool manufacturer ‘s social networking , microblogging tool on news and blog articles.

This article was written by: admin

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