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CNC Milling Cutting tool selection (b)

Article source:China metal processing networkResponsible editor:adminauthor:Kangding HardwarePopularity: Publication time:2017-05-11 22:06 font size:【 large middle Small

CNC Milling Cutting tool selection (b)

 

1. 90 ° square shoulder milling cutter

• 10 ° - 75 ° face milling and plunge milling cutters

• circular blade and a large radius tool

• ball-cutter

• groove cutter, three-blade cutter and thread milling cutter

90 ° square shoulder milling cutter

90˚ angle with a main tool the tool is very versatile and the most common type. Shoulder

Face mills, end mills and long edge cutters are included in this group.

• CoroMill 490 is the tool of choice for general shoulder face milling.

• CoroMill 390 is mills, face mills and square shoulder with good ramping capabilities long

Blade cutter combination. And a variety of tools to provide damping rounded blade for private workers

sequence.

• solid carbide cutting tools, CoroMill Plura and CoroMill 316, with a can

Replaceable cutting head, covered by a smaller diameter range.

• CoroMill 690 is designed for long cutting edge titanium milling cutter.

• CoroMill 790 is the main tool used for aluminum, with the best ramping energy

force.

• The group has other cutters Coromant finishing long edge milling cutter and Sandvik Auto-

FS finishing face milling cutters.

 

2, 10 ° - 75 ° face milling and plunge milling cutters

This tool is mainly used for a wide range of face milling processes, but has a very small main angle for interpolation

Milling cutter also belong to this group.

• CoroMill 345 is the basic concept for general surface milling, CoroMill 245 as a supplement

Charge option.

• CoroMill 365 is mainly used for cast iron.

• CoroMill 360 is the real heavy-duty cutter.

• CoroMill 210 and the corresponding versions of CoroMill 316 and CoroMill Plura non

Often suitable for high feed face milling techniques. These tools in the process of ramping performed very

Excellent, CoroMill 210 can also be used for plunge milling.

Combination of vital capacity

When developing the new square shoulder face mill concept, the crucial point is the ability to generate high quality surface with square shoulder end surface combined. Some milling cutter can cut a high level of end face and shoulder, but no tool can simultaneously achieve both accuracy and surface quality are high level.

Industrial production efficiency of most concern, and therefore must be able to be an excellent ability to face and square shoulder milling and finishing quality when performing the roughing process high metal removal obtained together. In some applications also require the roughing and finishing pass grouped together. Single cutting ability of both high metal removal rates and good surface quality shoulder, without the slightest compromise in terms of performance, on the contrary only continuous improvement, which is the ability in many modern applications sought.

Although the cutting tool costs account for only a small part of total production costs in all parts, but many users confused tool costs and inventory problems together in a prominent position. Side blade provides four cutting edges, also provides the best capabilities of each blade cutting edge. But the party rounded blade means 90, and appears limited to a combination of new efficient capacity Shoulder required for its application.

In the development of a truly high-performance 90 entering angle of the new milling cutter, the other blade of the requirements which also represents a challenge. Precision and eliminate any errors related to the knives, and high metal removal capability is absolutely required. In addition, the angular accuracy must also be several times higher than existing tools concept. By relying on existing CoroMill solutions, and at the same time develop a new concept of direction, so as to establish a suitable platform for the new square shoulder face milling mode. The latest advances in research and development of new manufacturing methods involve milling tools and measurement aspects have provided support for this.

To achieve the ambitious goals combination roughing and finishing tool, and also to use square inserts, then you need to be able to provide the face and shoulder while generating new cutting edge. In this case, it must establish a favorable effect and high precision cutting ability.

In any multi-tooth milling cutter, the cutting edge of the wiper band played a crucial role, because it is a decisive factor in generating end face. Wiper edge band must be longer than the amount of feed to the tool per revolution, to ensure it produces a good surface quality. Use wiper strip One of the problems is the cutting edge of a cutting tool is too long, an increase of cutting forces. Therefore, it is prone to vibration tendencies and lead to higher power consumption, and higher cutting stability requirements. For CoroMill 490, how to have the most suitable wiper band is one of the challenges it faces in the absence of the inherent shortcomings of the case.

Based on the tool front has a large enough for the blade axial inclination, positive rake angle and sharp cutting edge of the blade. 490 Solution With this lightweight cutting tool design, development and won the fundamentally. Cut obvious basic tool geometry also indicates that the blade into the material will be negative, which means more stable and increased strength. Precision tool also helps to ensure that solutions and favorable cutting action, especially in the more true for finishing. Unique new wiper blades and tool belt features not only ensure the successful development of the key factors CoroMill 490 capabilities, but also the tool has found a key factor in obtaining the best per watt metal removal rate.

Wiper (wiper) technology

Wiper (wiper) technology is the core part of the milling solution. Since Wiper (wiper) technology is the first to Sandvik Coromant for turning and development, so it further for CoroMill 490 with a wiper blade and a cutting edge for cutting a square shoulder were developed. When the cutting tool having a plurality of blades each blade edge by easily produced with the transition, and the number of generated errors knives.

In addition, there is the problem of the tool deflection. All tools will be skewed when cutting certain programs, and the use of conventional wiper band often due to stay sharp transition edge, while a negative impact on the resulting surface.

490 wiper blades with multi-arc Wiper (wiper) design compensates tolerances and cutting of angular deviation. This not only minimizes any tendency knives errors, but also improve the accuracy of face and square shoulder surface. Square shoulder passes through different through or between the end face of the generated surface of the blade, we are now able to achieve substantially the same effect, which is often required additional finishing.

Cutting parameters selection principle

When roughing, give full play to the performance of the machine and tool to increase the amount of metal removal as the main purpose, should choose a larger depth of cut, a larger amount of feed and the appropriate cutting speed.

When finished, the main consideration should be the quality assurance process, and as much as possible to improve processing efficiency, should be a small amount of feed and high cutting speeds. When poor machinability materials, since these materials are high hardness, high strength, low thermal conductivity, must first be considered a reasonable choice of cutting speed.

Cutting parameters selection method

In general, according to first select the cutting depth ap allowance, followed by disconnection of the machined surface roughness situation select feed f according to the workpiece material hardening depth and chips, and finally try to choose high (high-speed steel tool selection lower) cutting speed Vc, in order to control the cutting speed cutting temperature, eliminate tumor chips, ensure that the workpiece surface roughness.
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