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

With the continuous increase of the automotive industry market and the advancement of equipment, the automotive industry and CNC machine tools naturally have an indispensable relationship. We all know that the automobile industry can be said to be one of the industries that will always progress and will not reduce the market value and production Carbide Grooving Inserts quality. Whenever a newly developed product has a great feature, it used to take a long time to develop a car. The product has been completed in the shortest time so far. The most important thing is thanks to the approval of equipment suppliers. It is these equipment suppliers who provide various CNC machine tools. These CNC machine tools can meet market demands with the fastest production speed and highest efficiency.

Whether it is professional or practical, we can see the important role and significance of CNC machine tools clearly, which can be seen from its classification and characteristics. It mainly includes the following classifications: from the classification of processing varieties, it can be divided into CNC milling machines for processing shells, machining centers, turning centers, and CNC lathes with processing shafts; from the general category, it can be divided into special and general CNC machine tools; From the driving mode, it can be divided into stepping motors, DC servo motors, linear motors, etc.; from the spindle drive can be divided into DC spindle motors, AC spindle motors; from the position response mode can be divided into semi-closed and fully closed loop response. CNC machine tools have the characteristics of high machining accuracy and excellent flexibility, and have been paid attention to by the automobile manufacturing industry for a long time. In a very early period, the development of auto parts consumption required a very high expenditure. In addition, the system functions and efficiency were not ideal. Obviously, the maximum universal application range was not obtained. It entered the 1990s. , Slowly introduced CNC machine tools, and the manufacturing unit with it as the main body was widely used in the automobile industry. However, today's CNC machine tools are mainly developed to the high speed, and the high speed is used to improve the high Cermet Inserts efficiency work.

Therefore, in the scope of world's auto parts manufacturing, the use of CNC machine tools is becoming more and more common. However, from the perspective of the varieties of CNC machine tools, the number of low-level CNC machine tools is still the most. There are very few varieties of multi-axis CNC machining centers for gearboxes, chassis and other major auto parts, and most of them have no conceptual ideas of production and consumption.

In machining, hole machining accounts for about 40% of the cutting process. There are about 5,000 holes in daily auto parts, and there are many holes with complex shapes. The machining of the hole is carried out inside the workpiece, tungsten carbide inserts and certain machining skills are required to obtain higher precision. The processing of holes is roughly divided into 5 categories, we will talk about it in detail.

1. Drilling: see the picture below, it is drilling. The so-called drilling process is a processing method that directly drills holes without bottom holes.

2. Boring processing: see the figure below, it is a kind of processing to enlarge the bottom hole, also known as "reaming".

3. Reaming processing: still look at the figure below, and finish the bottom hole, which is a kind of precision reaming. This kind of machining method has the characteristics of small allowance, which is very suitable for the machining with high requirements for hole wall machining accuracy. At this time, the tool is also called Carbide Stainless Steel Inserts "reamer".

4. Roller finishing: see the figure below, a method in which soft metal is rubbed by hard material, and the precision of the machined surface is improved by plastic deformation.

5. Thread processing: When processing smaller threads, we use "tap" tools for processing, which is a common method for processing internal threads.

In the process of hole processing of aluminum alloy machining center, it is necessary to fully consider the performance of the equipment, the type of tool and the method of use, so as to ensure that the most suitable hole is processed by an efficient and economical method.

Carbide milling cutters are milling cutters made of cemented carbide. To understand the cemented carbide milling cutter, we must first know what is a hard alloy. The cemented carbide is based on the carbide (WC, TiC) micron powder of high hardness refractory metal, with cobalt (Co) or nickel (Ni). Molybdenum (Mo) is a binder and is a powder metallurgy product sintered in a vacuum furnace or a hydrogen reduction furnace.

Carbide milling cutter classification

Carbide milling cutters are mainly divided into: solid carbide milling cutters | carbide straight shank milling cutters | carbide saw blades milling cutters | carbide auger milling cutters | hard alloy machine reamer milling cutters | Carbide end mills | Carbide ball end mills

Carbide milling cutter’s application

Carbide milling cutters are generally used in CNC machining centers and cnc engraving machines. It can also be loaded onto a conventional milling machine to process some hard and uncomplicated heat treatment materials.

1. Carbide cylindrical milling cutter: used for horizontal milling machine processing plane. The teeth are distributed on the circumference of the milling cutter and are divided into straight teeth and spiral teeth according to the tooth shape. According to the number of teeth, there are two kinds of coarse teeth and fine teeth. The spiral tooth coarse-tooth milling cutter has a small number of teeth, high tooth strength and large chip space, which is suitable for rough machining; the fine-tooth milling cutter is suitable for finishing.

2. Carbide face milling cutter: It is used for vertical milling machine, end milling machine or gantry milling machine. It has cutter teeth on the end face and circumference, and also has coarse teeth and fine teeth. The structure has three types: integral type, insert type and indexable type.

3. Carbide end mill: used to machine grooves and step surfaces, etc., the teeth are on the circumference and end faces, and can not be fed in the axial direction during operation. When the end mill has a tooth that passes through the center, it can be fed axially.

4. Carbide three-face milling cutter: used to machine a variety of grooves and step surfaces, with teeth on both sides and circumference.

5. Carbide angle milling cutter: used to mill a groove at a certain angle, there are two kinds of single angle and double angle milling cutter.

6. Carbide saw blade milling cutter: used to machine deep grooves and cut workpieces, with more teeth on the circumference. In order to reduce the friction during milling, there are 15’~1° secondary declinations on both sides of the cutter. In addition, there are keyway milling cutters, dovetail milling cutters, T-slot milling cutters and various forming cutters.

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Carbide milling cutter milling method

The milling direction of the carbide milling cutter relative to the workpiece and the direction of rotation of the milling cutter are mainly the following two milling methods:

The first is down-cutting. The direction of rotation of the milling cutter is the same as the direction of feed of the cutting. At the beginning of the cutting, the milling cutter bites the workpiece and cuts the last chip.

The second type is up-cut milling. The direction of rotation of the milling cutter is opposite to the direction of feed of the cutting. The milling cutter must slide over the workpiece before starting the cutting. The cutting thickness starts at zero and the cutting thickness reaches the end of the cutting. maximum.

When milling, the cutting force presses the workpiece against the table, and the cutting force causes the workpiece to leave the table during up-cut milling. Since the cutting effect of the down-milling is the best, the down-cutting is usually preferred. Only when the machine has a thread gap problem or if there is a problem that can not be solved by the down-milling, the up-cutting is considered.

Each time a cemented Cemented Carbide Inserts carbide milling insert enters the cutting, the cutting edge is subjected to an impact load, which depends on the cross-section of the chip, the material of the workpiece and the type of cutting. Ideally, the diameter of the milling cutter should be larger than the width of the workpiece. The centerline of the milling cutter should always be slightly separated from the centerline of the workpiece. When the tool is placed against the center of the cutting, burrs are easily generated. The direction of the radial cutting force will change continuously as the cutting edge enters and exits the cutting. The machine tool spindle may vibrate and be damaged. The blade may be broken and the machined surface will be rough. The carbide milling cutter will be slightly off center and the cutting force direction will be No longer fluctuating, Deep Hole Drilling Inserts the cutter will get a preload.

Carbide milling cutter’s maintenance

When the cemented carbide milling cutter axis line and the workpiece edge line coincide or approach the edge line of the workpiece, the situation will be very serious, the operator should do the relevant equipment maintenance work:

1. Check the power and stiffness of the machine to ensure that the required cutter diameter can be used on the machine.

2. The overhang of the tool on the spindle is as short as possible, reducing the influence of the axis of the milling cutter and the position of the workpiece on the impact load.

3. Use the correct milling pitch suitable for this process to ensure that there are not too many blades to engage the workpiece at the same time to cause vibration during cutting. On the other hand, ensure that there are enough blades when milling narrow workpieces or milling cavities. Engages with the workpiece.

4. Make sure that the feed per blade is used to achieve the correct cutting results when the chips are thick enough to reduce tool wear. The indexable insert with positive rake groove shape provides smooth cutting results and lowest power.

5. Use a milling cutter diameter that is appropriate for the width of the workpiece.

6. Use the correct lead angle.

7. Place the milling cutter correctly.

8. Use cutting fluid only when necessary.

9. Follow tool maintenance and repair rules and monitor tool wear.

Proper maintenance of carbide milling cutters can extend tool life and increase work efficiency.

Carbide milling cutter’s selection

Milling stainless steel except end mills and some end mills and carbide as milling cutter materials, all other types of milling cutters are made of high-speed steel, especially tungsten-molybdenum and high vanadium high-speed steel have good effect, the tool Durability can be 1 to 2 times higher than W18Cr4V. Carbide grades suitable for making stainless steel milling cutters are YG8, YW2, 813, 798, YS2T, YS30, YS25 and the like.

The effect of spray cooling is the most significant, which can increase the durability of the milling cutter by more than one time; if it is cooled by a general 10% emulsion, the cutting fluid flow should be sufficiently cooled. When milling carbide with carbide milling cutter, take Vc=70～150m/min, Vf=37.5～150mm/min, and adjust it according to the alloy grade and workpiece material.

The adhesion and fusion of stainless steel are strong, and the chips are easy to adhere to the cutting edge of the milling cutter, which deteriorates the cutting conditions. When the milling is performed, the cutting edge first slides on the hardened surface, which increases the tendency of work hardening; impact during milling The vibration is large, which makes the milling cutter blade easy to chip and wear.

When milling stainless steel, the cutting edge must be sharp and bear the impact, and the chip pocket should be large. Large helical angle milling cutters (cylindrical milling cutters, end mills) can be used. The screw angle b is increased from 20° to 45° (gn=5°), and the tool durability can be increased by more than 2 times because the milling cutter works at this time. The rake angle g0e increases from 11° to over 27°, and the milling is light. However, the b value should not be large, especially the end mill should be b ≤ 35 °, so as not to weaken the teeth.

The stainless steel pipe or thin-walled parts are processed by the wave edge end mill, the cutting is light, the vibration is small, the chips are brittle, and the workpiece is not deformed. High-speed milling with carbide end mills and milling of stainless steel with indexable end mills have achieved good results.

Milling 1Cr18Ni9Ti with silver end mills with geometric parameters gf=5°, gp=15°, af=15°, ap=5°, kr=55°, k′r=35°, g01=-30° , bg=0.4mm, re=6mm, when Vc=50～90m/min, Vf=630～750mm/min, a′p=2～6mm and the feed amount per tooth reaches 0.4～0.8mm, the milling force is reduced. Smaller 10% to 15%, milling power is reduced by 44%, and efficiency is greatly improved. The principle is that the negative chamfer is ground on the main cutting edge, and the built-up edge is artificially generated during milling, so that it can be cut instead of the cutting edge. The front angle gb of the built-up edge can reach 20~~302, due to the lead angle The effect is that the built-up edge is caused by the thrust generated on the rake face parallel to the cutting edge to become the auxiliary chip, thereby taking away the cutting heat and lowering the cutting temperature.

When milling stainless steel, it should be processed by the same method as possible. The asymmetrical cross-milling method can ensure that the cutting edge is smoothly cut off from the metal, and the contact area of the chip bonding is small, and it is easy to be smashed under the action of high-speed centrifugal force, so that the chip impacts the rake face when the tooth re-cuts into the workpiece. Peeling and chipping improve the durability of the tool.

Stainless steel materials are widely used and can be encountered in machining, milling, drilling and tapping. But because stainless steel has different characteristics than other general materials, processing stainless steel has become a big problem for technicians!

John Saunders, a machinist and shop owner known for running the most popular?YouTube channel?on CNC machining, used his platform to speak about BIG KAISER’s Digital Boring Head, a tool that is known for machining thousands of holes with absolute precision.

The Digital Boring Head makes use of a short, thick boring bar for maximum stiffness when boring. Additionally, the Digital Boring Head’s easy to read digital display screen allows for a simplified approach to setting accurate hole size. There’s no need to read a vernier or worry about inaccuracies in measurement — making for accurate and consistent machined parts.

In fact, Saunders says in the video that “the easier a tool is to use, the more likely you are to embrace it and be proud of using it.”Tungsten Steel Inserts

Throughout the video, NYC CNC demonstrates how to set up the tool, how to use it for a consistent bore diameter, what the tool looks like while in use and how to read results.

“The coolest thing about this tool is simple, it’s the screen,” says Saunders. “What you see is what you get.”

To watch the full video titled “BIG KAISER Digital Boring Head! Amazing CNC Tool!” click?here. More detailed information on our tungsten carbide inserts Digital Boring Head is available on our product?page?as well.

Even animals use tools properly, but humans on a typical CNC shop floor totally misuse cutting tools.

The city I live in, Bangalore, with its aspirations to be a ‘world class city’ (whatever that means), thinks NMT is not fashionable, and the result is this, an example of pollution on Bangalore’s roads. Bangalore has the dubious distinction of being among the top 5 polluted cities in India, while Kolkata does not.