SUMITOMO ELECTRIC AC1135U Small Parts Turning Application Guide

SUMITOMO ELECTRIC AC1135U Small Parts Turning Application Guide

In the field of precision manufacturing, the machining conditions of small lathes and Swiss type automatic lathes are often extremely harsh. Especially when dealing with difficult to machine materials such as stainless steel and pure iron, engineers often face three core pain points: micro chipping of cutting edges, deterioration of surface quality caused by chip deposits, and frequent tool changes due to short tool life. The new AC1135U coated hard alloy grade provides a highly targeted technological breakthrough solution for these processing difficulties in the "search for solutions" stage. As a universal material designed specifically for small part machining, it not only demonstrates excellent chip control capabilities under a wide range of cutting conditions, but also redefines the stability standards of precision machining through special surface treatment and coating technologies.

Core Technology Breakthrough: Double Coating and Surface Treatment Process

To understand why AC1135U stands out among many materials, it is necessary to deeply analyze its coating architecture. Traditional coated cutting tools often suffer from severe chip adhesion due to rough coating surfaces under low-speed cutting or micro lubrication conditions. AC1135U adopts an innovative composite coating structure, perfectly combining the anti adhesion layer with the anti chipping layer.

Firstly, its surface is treated with a special smooth gloss treatment technique. This special surface treatment can effectively suppress the adhesion of chips to the front cutting surface of the tool, thereby significantly reducing the occurrence of micro chipping. In precision machining, any small chipping will be directly reflected in the surface roughness of the workpiece. The surface layer of AC1135U is a composite layer based on TiCN (titanium carbide nitride), which has excellent anti adhesion performance. Under low-speed cutting and precision machining conditions, the TiCN layer can effectively reduce the formation of chip deposits, thereby maintaining a high level of machined surface quality.

Below the surface, AC1135U adopts a TiAlN (titanium aluminum boron nitride) based coating with ultrafine grains. This coating has extremely high toughness and can effectively suppress unpredictable sudden blade breakage, achieving high stability processing. In order to ensure that these two layers of coatings do not peel off under harsh cutting forces, the material also applies special high adhesion technology, which further enhances the overall anti chipping ability of the tool by strengthening the bonding strength between the coating and the substrate. This dual guarantee of "external anti adhesion and internal anti chipping" enables AC1135U to cover a wide processing range from low speed to high speed when handling stainless steel and steel parts.

Chip groove selection strategy: from precision machining to universal machining

With an excellent material foundation, a suitable chip breaker groove is the key to maximizing tool performance. The AC1135U series offers a wide range of chip breaker options, allowing engineers to accurately match according to specific machining conditions.

For precision machining applications that pursue ultimate surface quality, MEFF chip breakers are the ideal choice. It has excellent sharpness and can achieve excellent chip control even with small feed rates and extremely shallow cutting depths, making it particularly suitable for precision parts with extremely high requirements for appearance and dimensional tolerances.

When there is a problem of long chips in the processing conditions, or when the cutting depth reaches 0.019 inches or more, MESI chip breaker becomes the preferred recommendation. As the main chip breaker, MESI can demonstrate excellent chip control capability under a wide range of cutting conditions. If the chips are still too long or the cutting depth reaches 0.040 inches or more, engineers can further choose the MEFC chip breaker, which enhances chip removal capability while maintaining precision machining characteristics.

In addition, MESL chip breakers provide a perfect solution for working conditions that are prone to vibration, burrs, or poor surface quality during machining. MESL has sharper cutting edges and can maintain excellent edge sharpness under a wide range of cutting parameters. In practical operation, if there is poor chip removal or surface quality deterioration, replacing MESI with MESL can often solve the problem immediately. This downgrade/upgrade selection logic from MESI to MESL, MEFF provides a clear troubleshooting path for on-site engineers.

Practical Case Verification: Cross industry Processing Performance Comparison

To verify the performance of AC1135U in actual production, we conducted in-depth analysis by combining real processing cases from multiple industries. These cases cover multiple high-end manufacturing fields, from semiconductor equipment to medical and automotive industries, fully demonstrating their outstanding performance under different operating conditions.

1. Semiconductor manufacturing equipment components (316 stainless steel)

The dual melting 316 stainless steel components in semiconductor equipment require extremely high cleanliness and dimensional accuracy. In continuous external turning and end face machining, the DCGT21.50-MESI-AC1135U tool is used with cutting parameters of vc=365 SFM, f=0.0016 IPR, ap=. 002-0.008 ". Compared with traditional competitors, AC1135U effectively suppresses cutting edge chipping and increases tool life by an astonishing 12.5 times. Competitors can only process 20 pieces, while AC1135U has consistently processed 250 pieces, greatly reducing downtime for tool changes.

2. Medical equipment components (304 stainless steel)

Medical device components typically require extremely high surface integrity. When processing 304 stainless steel medical components, DCGT21.50MESI-AC1135U is used for continuous outer circle machining with a cutting parameter of vc=130 SFM. In the case of failure due to surface roughness exceeding the standard after processing 5000 pieces with competing tools, AC1135U successfully processed 10000 pieces, with a tool life twice that of competing D-grade tools, and the processed surface quality remains excellent.

3. Automotive components (pure iron and STKN materials)

In the manufacturing of automotive parts, pure iron materials are prone to causing tool tip breakage and burrs. Use CCGT32.50.5MESI-AC1135U for intermittent precision machining, with cutting parameters of vc=500 SFM and f=. 004 IPR. AC1135U minimizes tool tip chipping and achieves a tool life 1.4 times that of its competitors (700 pieces vs 200-500 pieces). When processing STKN automotive components, AC1135U effectively suppresses the wear of the front cutting surface, achieving a 1.5-fold increase in tool life and ensuring that there are no burrs on the external chamfers.

4. Beverage and electrical equipment components (304 stainless steel)

AC1135U also performs well in the continuous outer circle processing of 304 stainless steel beverage equipment components. Under the working condition of vc=165 SFM, compared with competitors, its tool damage is minimal, and it still maintains good condition after processing 3000 pieces. In the processing of 304 stainless steel electrical equipment components, AC1135U significantly reduces the phenomenon of chipping, and the surface quality of the processed material is much better than that of conventional materials under the same processing quantity.

Long term verification of surface quality and dimensional stability

In addition to the improvement of tool life, the dimensional stability and surface roughness control of AC1135U in long-term machining are also remarkable. In the comparative test of external turning of 316 stainless steel, after a cutting distance of 11 miles, the surface of the workpiece machined by AC1135U remained smooth, while the surface of the workpiece machined by conventional materials showed obvious tearing and pulling.

In the variable speed test of end face machining (vc=65 to 400 SFM), AC1135U can still achieve excellent machining surface quality at low speeds (65 SFM), thanks to its excellent anti adhesion coating. In long-term dimensional tolerance testing, the size fluctuation of AC1135U workpiece is minimal and can maintain high-precision dimensional tolerances for a long time, while the size fluctuation of conventional materials and competitor grade A significantly increases with the increase of cutting distance.

In cutting processing, AC1135U also demonstrated strong advantages. Using GCMN2002-GF cutting tool for cutting 316 stainless steel, AC1135U achieved a tool life 1.7 times that of conventional materials at a high speed of n=3000 min ⁻¹. Even when processing 125 pieces, it effectively reduced cutting tearing and ensured the smoothness of the cut surface.

Complete tool and boring system support

AC1135U is not just a material grade, it has a complete tool product line support. In terms of turning, various specifications of G-grade positive angle inserts are provided, including 80 ° diamond (CC type), 55 ° diamond (DC type), triangle (TC/TP type), square (SC type), etc. These blades offer a wide range of rounded corners (such as 0.2, 0.4, 0.8, etc.) and inscribed circle diameters to meet the contour machining needs of different precision parts.

In the field of slotting and boring, AC1135U material is applied to GWC slotting tool systems and PSZ series quick change tool heads. The TGA R/L series square slotted blades offer a variety of cutting width options from 0.33 inches to 2.80 inches, and have a maximum cutting depth capability of 3.00 inches. For small aperture inner circle machining, the BXBR series boring bars (such as BXBR02005R to BXBR05020R) are perfectly combined with AC1135U material, providing a minimum boring diameter from 2.0mm to 5.0mm, and equipped with corresponding HBX series bushings to ensure rigidity in small aperture machining.