Recent developments in the automotive, aerospace, and general machining sectors have resulted in a tendency toward producing components that are both more accurate and smaller in order to decrease overall weight and boost overall performance.
You should give some thought to using CCMT inserts with positive angle inserts if you are going to be machining tiny precision components on automated lathes or smaller sized CNC lathes. Inserts that are considered positive have relief and are positioned in the pocket at an angle that is either neutral or even positive rake. Because this positive angle minimizes the cutting force, it is well suited for the machining of items that are either tiny or have thin walls. Additionally, it is the method of choice for machining sticky materials. The disadvantage of positive inserts is that they only have one cutting edge, and the cost of each individual cutting edge tends to be rather high. The answer is to design a positive insert, which will allow you to get twice as much use out of a single insert, so decreasing the cost of equipment while also enhancing both productivity and the efficiency with which it cuts.
What is CCMT Insert?
Positive inserts, CCMTs have a clearance angle of 7 degrees and are classified as such. Boring and fine boring apps constitute a significant portion of its user base. There is a variety of diameters, nose radii, and grades available for use in the machining of various materials. Various sizes are available for purchase at HUANA. Turning insert CCMT with a rhombic form at an angle of 80 degrees, a clearance angle of 7 degrees, and a single-sided design is available in a number of brands and references. Get in touch with HUANA to get the insert you need. According to the technical information provided by the insert, this material is the best option for internal turning, exterior turning of slender workpieces, and boring of all kinds of steel. Because of its rhombic form and medium nose angle, this tool has a greater propensity to vibrate, but its cutting edge is stronger, making it appropriate for roughing, medium finishing, and finishing.
For the vast majority of turning, a CCMT 09 insert is used. This insert is held in place by a turning tool body, which is subsequently put on the turret of the lathe. CCMT 09 inserts make use of highly developed composite structures, coatings, and geometrical characteristics in order to accomplish both high material removal rates and high levels of precision.
The manufacturer had difficulties with chip control while using the CCMT type insert. The unexpected chipping was brought on by vibration, which also decreased the life of the insert tool. When the HUANA used the innovative CCMT 12 04 08 insert with positive angle, the vibration was minimized thanks to the firm clamping of the toolholder. Additionally, the low cutting force and good wear resistance contributed to the longer life of the tool.
CCMT Insert Models
Whether you need HUANA CCMT Insert for unattended production or components that are created to order, we have trustworthy CCMT 12 04 08 insert that provide a predictable tool life, excellent machine utilization, and the surface quality that you need. Screw-On Style Insert for the ccmt insert specification. Utilized for both the semi-finishing and finishing processes on a broad variety of materials. – 80° Diamond Insert with a single side that has a molded chipbreaker
All CCMT060208, CCMT09T308, and CCMT120408 new generation turning insert with positive angle promise increased performance in every manner. They are suggested for continuous and interrupted cuts and are coated with second generation CCMT060208, CCMT09T308, and CCMT120408 and offer a wide variety of uses. The first-choice products are CCMT060208, CCMT09T308, and CCMT120408 because they have greatly increased toughness, as well as better wear resistance and heat resistance. This allows for a much broader variety of applications. When there is a need for increased heat resistance, the grades CCMT060208, CCMT09T308, and CCMT120408 are complementary to one another. It makes it possible to cut and finish for extended periods of time in cut when the circumstances for machining are steady.
Chipbreaker Styles For CCMT Insert
HUANA CCMT Insert, Single-sided CCMT insert specification with Positive Angle, 80 Degrees inserts featuring a variety of molded chipbreaker types. Insert of the screw-on kind. The perfect choice for semi-finishing and finishing work on a diverse variety of materials.
- MT Chipbreaker
MT-style chipbreaker insert that promises effective chip management and stable machining. When cutting tiny components, an efficient chip management system is essential, which is why the MT type chipbreaker was developed. Because it has a big inclination angle built into its cutting edge, it is able to generate a chip flow that is smooth and a cutting condition that is light. Chip nests are nearly eliminated as a result of this shape, which also results in a reduction in the amount of machine downtime and an improvement in the finishing quality. The MT chipbreaker expands the variety of possible applications in the machining of tiny parts.
- UF Chipbreaker
CCMT insert type for the UF finishing chipbreaker. Recommended for finishing low-carbon to low-alloy steels, as well as other sticky steel alloys, while cutting at a medium to low speed. Excellent when a surface polish or cutting action that is very sharp is required. Because of its exceptional resistance to thermal stress, it may also be used for mild intermittent cutting.
- FA Chipbreaker
Excellent chip control may be achieved with the FA chipbreaker even when extremely low feed rates and depths of cut are used. It is perfect for putting on the final touches. The CCMT 06 02 04 insert FA chipbreaker has a high positive rake angle to reduce the amount of effort needed for cutting. It provides a great surface finish on the workpiece and may be utilized for that purpose. Excellent chip control may be achieved with an FA-style chipbreaker even at extremely low feed rates and cutting depths.
How to Choose a Positive Angle Turning Insert for Finishing Turning Processing?
In the past several years, a significant amount of headway has been achieved in the direction of optimizing the effectiveness of roughing operations. But what about bringing it to a close? In order to produce high-quality surface finishes, long cycle durations may be required. Additionally, numerous insert replacements are sometimes required, which further increases both tooling costs and the amount of time that is not spent machining. The problem becomes more complicated as the materials get more complex.
The question now is, which insert is the most effective for the finishing application? HUANA Tools, a renowned producer of cutting tools, provides its customers with a CCMT 06 02 04 insert with positive angle, which is ideal for boring and finishing applications. This information is provided to assist answer the aforementioned issue. This is what they came to discover.
CCMT Insert Speed, Finish and Wear
Shops can run at greater cutting speeds, bigger depths of cut, or higher feed rates for roughing applications in order to maximize the metal removal rate and decrease cycle durations. In contrast, the depth of cut is often not variable in single-pass finishing processes; rather, cutting speed and feed are the only parameters that may be adjusted. In addition, the majority of workpieces have a defined level of surface polish, which puts a cap on the maximum feed rate. When working with straight cuts, CCMT inserts are an option to explore. Inserts made of CCMT are often recognized as a superior choice for use in finishing applications. The insert is chemically inert and thermally stable, and it possesses a high resistance to edge accumulation and crater wear. As a result, it extends the life of the tool while also delivering an exceptional surface quality.
How should a turning tool be selected for the turning process, particularly for finishing and boring operations? Here is how:
- Determine the angle of entry for the rotating tool holder
The entrance angles of conventional tools that are ideal for finishing are typically between 90 and 95 degrees, with 91, 93, and 95 degrees being the most common of these angles. Because the angle of entry is so close to ninety degrees, the cutting force is directed along the axis of the workpiece, and there is no vertical force imparted to the workpiece. This helps to prevent vibration and deformation of the workpiece (thin-walled parts processing is especially important). In most cases, the entering angle may be verified by looking at the tool bar.
- Determine the angle of the tool tip or select the form of the tool
In general, the following are the turning insert shapes that are most typically used:
Inserts that are round begin with the letter R and have an ISO standard code that is repeated below. Inserts that are 90 degrees square begin with the letter S, inserts that are 80 degrees diamond begin with the letter C, inserts that are 80 degrees convex triangle begin with the letter W, inserts that are 60 degrees triangle begin with the letter T, inserts that are 55 degrees diamond begin with the letter D, and inserts that are 35 degrees diamond begin with the letter 35.
The range of standard turning inserts that can be accommodated by these tool designs is effectively more than 90 percent. The following categories of inserts are listed in descending order of their tool strength: R, S, C (W), D, and V. The R insert possesses the maximum strength, while the V insert possesses the lowest. However, increasing the strength also increases the resistance, which in turn increases the likelihood that there will be vibration. As a result, R, S, and C (W) are the choices that we frequently make for roughing. We will complete the process by selecting D and V. The capacity to profile, which is necessary for completing, is also V at its finest and R at its worst….
- Determine the tool’s rake and rear angles
The negative rake angle tool is hard and difficult to chip, making it ideal for harsh machining, whereas the positive rake angle insert cuts gently and is better suited for finishing. The rear angle and the rake angle have a corresponding connection. In general, negative rake angle inserts are 0 degrees. The positive rake angle insert has three regularly used clearance angle combinations: 5°(B, ISO code, see below), 7°(C), and 11°(P) (referring to turning only).
Common combinations include: CC/CP (C type positive rake angle insert 7°/11° clearance angle), DC (D type positive rake angle insert 7° clearance angle), VC/VB (V type positive rake angle insert 7°/5° clearance angle), and WB/WC (W-type positive rake angle insert 5°/7° clearance angle) (the front and rear corners are determined)
Combining the three, the conventional finishing tool form is as follows:
- Tool holder with a 95° entry angle and a CC insert
- 93° tool holder + WB/WC/DC/VC/VB insert
- 91° tool holder + DC/VC/VB insert
Individuals choose the 93° entry angle toolholder +DC as the finest finishing plan among them (referring to the turning radial direction only). This strategy includes acceptable cutting settings, and the processing result should be among the finest in current turning. I tried 1.6 roughness in various other materials and 0.8 roughness in another steel component since the inner hole and shank diameter are limited, therefore I can only use 95° entrance angle shank + CC insert.
Of course, the alternatives listed above are not unique. In working conditions where medium and large diameter solid materials can achieve high linear speed, the insert with 0° clearance angle (ISO code N) can also produce better roughness, but roughness at this time is more dependent on thick oxidation aluminum CVD coated inserts that are “ground” at high linear speeds. This roughness is roughly one grade higher than the roughness treated by the tool indicated above. In other words, the CN insert can be set to 1.6 and the DC insert to 0.8.
Conclusion
On the lookout for a CCMT insert deal? CCMT Insert with an 80-degree rhombic shape, a 7-degree clearance angle, and a single-sided design is available in a variety of brands and references. HUANA has a large selection of the top CCMT inserts for you to choose from! When you shop for CCMT insert from HUANA, you’ll find plenty of savings in addition to high-quality brands. Contact HUANA to obtain the insert you want.
