DEEP HOLE DRILLING INSERTS,LATHE MACHINE CUTTING TOOLS,CARBIDE INSERTS

DEEP HOLE DRILLING INSERTS,LATHE MACHINE CUTTING TOOLS,CARBIDE INSERTS,We offer round, square, radius, and diamond shaped carbide inserts and cutters.

What is Cutting Heat Transfer

How cutting heat is generated

The cutting heat is generated in three deformation zones. During the cutting process, the metal deformation and friction in the three deformation zones are the root cause of the cutting heat. Most of the work of deformation and friction during the cutting process is converted into cutting heat. The figure below shows the location of the heat generated by the cutting heat and the dispersion.

The amount of heat generated by the cutting heat and the proportion of heat generated in the three deformation zones vary with the cutting conditions. When processing plastic metal materials, when the flank wear amount is not large, and the cutting thickness is large, the heat generated in the first deformation zone is the most. When the tool wear amount is large, and the cutting thickness is small, the third deformation zone The proportion of heat generation will increase. The following diagram shows the ratios of heat generated in the three deformation zones to the thickness of the cut when machining nickel, chromium, molybdenum, vanadium and steel with a carbide tool.

Diagram 1. three ratios of heat generated by nickel, chromium, molybdenum

  • First deformation zone 2-second deformation zone 3-third deformation zone
  • When processing brittle materials such as cast iron, due to the formation of breaking chips, the contact length of the chip is small, the friction on the rake face is small, and the proportion of heat generation in the first and second deformation zones is decreased. Therefore, the proportion of heat generated in the third deformation zone is relatively increased. .

    The heat of cutting generated during the cutting process is dissipated outside the cutting zone by the chips, the workpiece, the tool and the surrounding medium. The proportion of heat transfer by each route is related to the cutting form, the tool, the workpiece material and the surrounding medium. 50%~86% of the heat in the turning process is taken away by the chip, 40%~10% is transferred into the turning tool, 9%~3% is introduced into the workpiece, and about 1% is introduced into the air. When drilling, 28% of the heat is taken away by the chips, 14.5% is transferred into the tool, 52.5% is introduced into the workpiece, and about 5% is introduced into the surrounding medium.

    In addition, the cutting speed “υ” also has a certain influence on the heat transfer ratio of each route. The higher the cutting speed, the less heat is carried away by the chips. The chart below shows the effect of enthalpy on the heat transfer.

    Dia.3 The cutting velocity’s influence on cutting heat transfer


    I—Tool II—Workpiece III—Chip

    Cutting heat and its effect on the cutting process

    The heat generated by cutting a workpiece with a tool is called cutting heat. Cutting heat is also an important physical phenomenon in the cutting process, BTA deep hole drilling inserts which has many effects on the cutting process. The heat of the cutting is transferred to the workpiece, which causes thermal deformation of the workpiece, thus reducing the machining accuracy. The local high temperature on the surface of the workpiece deteriorates the quality of the machined surface.

    The heat of cutting that is transmitted to the tool is an important cause of tool wear and tear. Cutting heat also affects cutting productivity and cost by causing tool wear. In short, cutting heat has direct and indirect effects on the quality, productivity and cost of cutting. Research and master the general rules of heat generation and change of cutting heat, limit the adverse effects of cutting heat to the allowable range, and cut the machining. Production is of great significance.

    Main factors affecting cutting gravity turning inserts temperature

    First, the influence of cutting amount on cutting temperature

    1. Cutting speed has a significant effect on cutting temperature. Experiments have shown that as the cutting speed increases, the cutting temperature will increase significantly.

    2. The feed rate f also has a certain influence on the cutting temperature. As the feed rate increases, the amount of metal removal per unit time increases, and the cutting heat generated during the cutting process also increases, causing the cutting temperature to rise.

    However, the increase in cutting temperature as the feed rate increases is not as significant as the cutting speed.

    3. The depth of cut ap has little effect on the cutting temperature. Since the heat generated in the cutting zone increases proportionally after the depth of cut ap increases, the increase in the cutting temperature is not significant because of the improved heat dissipation conditions.


    The Carbide Inserts Blog: https://cnmginsert.bloggersdelight.dk

    3 Ways to Improve CNC Utilization Without Sacrificing Safety

    I once heard a colleague say, “Safety, ease of use, efficiency: pick two.” It can be difficult to strike a balance among these three productivity-affecting qualities. Anything done to improve one can potentially degrade the others. Efforts to improve efficiency, for example, might involve dangerous shortcuts or overly complicated tasks.

    Companies seeking to improve their CNC machine utilization usually do so for several reasons.

    For these reasons, always be on the lookout for ways to increase machine and personnel utilization. But of course, this must be done in a safe manner. Efficiency-related improvements must not violate safety priorities:

    Mistakes are commonly the single-largest cause of unsafe conditions and are a symptom of undertrained operators. These mistakes come in many forms, from a misloaded workpiece or cutting tool to running the wrong program to making an incorrect sizing adjustment. The product of these mistakes is often a machine crash.

    Machine crashes result in scrap workpieces, broken cutting tools, damaged machines and even injured operators. So, eliminating crash-causing mistakes will make for a safer working environment. And considering the amount of time required to get a machine up and running again after a crash, eliminating crash-causing mistakes might be the best way to improve CNC machine utilization.

    There are two ways to reduce operator mistakes:

    In either case, you will improve shop safety as operators grow in their competence and begin to eliminate mistakes.

    Ideally, CNC machines should be attended 100% of the time, including during setups and production runs. Surface Milling Inserts However, machines often sit idle while waiting for someone to return and do something. While CNC operators may have appropriate reasons for leaving their machines from time to time, often the cause of non-attendance is related to preparation and organization. Here are a few suggestions:

    From a safety standpoint, well-organized operators are safe operators. An organized work area will keep operators focused on the task at hand.

    Operators should not have to overly exert themselves mentally or physically in order to accomplish their tasks. If someone is struggling or if they are taking a long time to complete a task, find a way to help them.

    For example, say machine tool operators are taking excessive time during sizing adjustments and sometimes making mistakes when determining the deviation amount and polarity. TCGT Insert In this case, provide them with the high limit, low limit and target values for every surface being sized. Also, find a way to let them specify the surface type (external or internal), measured value and target value using a tablet or programmable calculator. Have the device respond with the deviation amount and polarity.

    People who have the help and resources needed to complete their assigned tasks will be safer than people who must figure things out on their own. Additionally, they will do so in the manner and timeframe you intend.


    The Carbide Inserts Blog: http://arthuredwi.mee.nu/

    Toolholder with Single Base Holder and Adapters with ER Collect Pocket

    The Preci-Flex tooling system is designed to be a fast, accurate and cost-effective solution for turning machine tooling change-overs. According to the company, the modular system is the first tooling system on the market with a single-base holder and multiple tooling adapters that use the ER collet pocket. The system’s conical and flat face planar interface allows the use of either an adapter or a standard ER collet and enables collets, endmill holders, expanding collet chucks and shrink fit tooling to be mounted on a single-base holder.

    Available in a range of sizes, the tooling system provides unsurpassed productivity and reliability, RCMX Insert with every toolholder offering repeatability within 5 microns, the company says. The system CCGT Insert also virtually eliminates machine downtime and allows tooling adapters to be interchanged between fixed and rotary base holders for fast, economical machining.

    EXSYS Tool Inc.


    The Carbide Inserts Blog: https://neilmeroy.exblog.jp/
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