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NANJING ALAS INTERNATIONAL CO., LTD
Views: 1 Author: ALAS-MT Publish Time: 2026-06-08 Origin: Site
The geometric accuracy, structural strength and surface quality of high-quality standard network cabinets largely depend on two core pre-processes: burr control and straightness of sheet metal in shearing, as well as angular accuracy and shape consistency in bending forming. As a professional manufacturer of bending dies and shear blades, we are deeply familiar with various production pain points in mass production of network cabinets. From the perspective of tooling and dies, this paper sorts out the full processing flow of cabinets, explains the key points of die selection and blade application, and helps manufacturers stably produce standard network cabinets that comply with ANSI/EIA RS-310-D standards.
Rectangular components of network cabinets such as side panels, door panels, top and bottom covers are mostly blanked by shearing machines. Compared with laser cutting, shearing process features higher production efficiency and no heat-affected zone, making it the preferred solution for mass cabinet production. The quality of blanked finished products is mainly determined by three key factors: blade clearance, cutting edge sharpness and base material properties.
Too small blade clearance will accelerate edge wear and even cause edge chipping; excessive clearance will lead to increased shearing burrs and unqualified straightness of sheet edges, directly affecting the positioning accuracy of subsequent bending processes.
Recommended clearance parameters for commonly used SPCC cold-rolled steel sheets for cabinets are as follows:
Sheet Thickness (mm) | Recommended Bilateral Clearance (mm) | Maximum Allowable Burr Height (mm) |
1.0 | 0.06 | ≤0.08 |
1.2 | 0.08 | ≤0.10 |
1.5 | 0.10 | ≤0.12 |
2.0 | 0.14 | ≤0.15 |
Our shear blades are made of 6CrW2Si, H13, H13K alloy tool steels, processed by vacuum heat treatment and precision grinding. The straightness of the cutting edge reaches 0.01mm/300mm. With reasonable clearance adjustment, the shearing burr can be stably controlled within 0.1mm, greatly reducing the workload of subsequent polishing processes.
The service life of shear blades is closely related to sheet thickness, material strength and production working conditions. The blades exhibit excellent wear resistance and longer service life per sharpening when shearing thin sheets; blade wear increases correspondingly and the sharpening cycle needs to be appropriately shortened with the increase of sheet thickness and hardness.
Compared with ordinary commercial blades, our custom cabinet-specific shear blades feature significantly improved wear resistance and service life. They support multiple regrinding cycles without frequent replacement, effectively reducing customers' overall procurement and operation costs. We can customize and calculate the blade service life and provide accurate sharpening and replacement cycle solutions according to customers' actual sheet thickness, production volume and processing conditions.
Bending is the core process of forming flat sheets into three-dimensional cabinet frames. The accuracy, surface quality and selection rationality of dies determine the stability of bending angles, surface indentation avoidance and processing interference prevention.
Die Type | Application | Applicable Cabinet Components |
Straight Knife Die | Standard 90° bending | Cabinet columns, beams, door frames |
Gooseneck Die | Avoid interference with pre-bent edges | Side panel rear buckling edges, U-shaped parts |
30° Acute Angle Die | Pre-bending for flattening process | Cabinet door panel reinforcing edges |
Flat Die | Flatten pre-bent 30° edges | Door panel flattening edges |
Special Forming Die | Special forming such as arcs and reinforcing ribs | Custom special-shaped components |
Our bending dies are made of 42CrMo alloy steel, treated by vacuum quenching and tempering, with uniform overall hardness stably maintained at HRC 45~50. The working surface of the die adopts precision grinding technology, with an angle tolerance of ≤±0.15°, surface roughness of Ra≤0.4μm, and overall straightness of ≤0.02mm/m. For the bending demand of long-size cabinet columns over 2 meters, we adopt segmented extended dies to ensure uniform bending angle of the entire workpiece.
The dies are fully hardened with excellent accuracy retention. They are not prone to wear, deformation or angle deviation during long-term mass production, meeting the high consistency production requirements of cabinet manufacturing.
Cabinet Component | Recommended Upper Die (Model Example) | Recommended Lower Die V-width | Core Process Requirements |
1.5mm Thick Column | Straight Knife SZ-90-835 | V12 | Long size, high straightness |
Front Door Flattening Edge | 30° Acute Knife SJ-30 + Flat Die SP-100 | V10 (Acute Knife Station) | Indentation-free surface, smooth R-angle |
Side Panel Rear Buckling Edge | Gooseneck Die SG-200 | V10 | Avoidance height ≥25mm |
Equipment Mounting Square Strip | Straight Knife SZ-90-600 | V10 | Qualified bilateral bending symmetry |
Combined with high-frequency faults in cabinet mass production, we sort out the causes and corresponding solutions from the perspective of dies and blades:
Abnormal Phenomenon | Die/Blade Related Causes | Matching Solutions |
Bending position cracking | Insufficient lower die V-slot width; too small upper die sharp R-angle | Select standard V-slot according to sheet thickness (8 times of sheet thickness); equip with large rounded R-angle dies |
Obvious surface indentation | Rough die surface, adhered iron filings and impurities | Precision grinding + chrome plating treatment; factory anti-rust protection for finished products |
Unstable bending springback & angle deviation | Die wear, uneven fitting clearance | Full hardening treatment for stable accuracy; provide professional angle compensation process solutions |
Inconsistent bending angles at both ends of long workpieces | Poor die straightness, uneven slider force | Segmented fully ground long dies with straightness strictly controlled ≤0.02mm/m |
Workpiece distortion after bending | Misalignment of upper and lower dies, unilateral force bearing | High-precision key grooves and mounting reference surfaces for fast and accurate alignment |
Shear blades and bending dies run through the complete cabinet production process, and their matching degree directly affects the efficiency and quality of the entire process:
1. Sheet Shearing: High-quality blades + standard clearance → low burr & high straightness sheets → accurate positioning datum for bending;
2. Bending Forming: Matched dies + high-precision bending → uniform size & indentation-free surface → reduced welding adjustment workload;
3. Welding & Polishing: Improved bending accuracy → uniform weld gap → polishing workload reduced by more than 30%;
4. Surface Spraying: High die surface finish → no deep scratches on bending surfaces → uniform coating adhesion and greatly reduced substrate exposure rate.
High-quality blades and dies not only improve the yield of core shearing and bending processes, but also reduce costs, improve efficiency and enhance quality for subsequent processes in an all-round way.
Our bending dies adopt full hardening technology with high rigidity and fatigue wear resistance, maintaining long-term precise accuracy in mass production without deformation or wear failure. Shear blades are processed with multiple precision technologies, featuring excellent edge toughness and wear resistance. They have greatly improved service life compared with ordinary tools and support multiple regrinding cycles, delivering high long-term cost performance. All product performances are verified by actual mass production.
We provide one-on-one calculation of blade and die service life according to customers' sheet specifications, daily output and production conditions, and formulate exclusive sharpening and replacement cycle solutions to adapt to diverse mass production needs.
With die angle tolerance of ±0.15° and shear blade straightness of 0.01mm/300mm, our products meet the manufacturing requirements of high-end standard network cabinets and support standardized and high-quality mass production.
Bending dies are made of 42CrMo die steel, and shear blades are made of 6CrW2Si, H13, H13K tool steel. All products adopt vacuum heat treatment with uniform hardness and excellent wear resistance, ensuring stable performance from the material source.
We support custom processing of special-shaped dies and non-standard length blades according to drawings, with a delivery cycle of 7-15 days, meeting the processing needs of various customized cabinets and special-shaped components.
We provide free technical guidance including die selection, blade clearance adjustment and bending process optimization, helping customers reduce trial and error costs, optimize production processes and improve finished product yield.
Nanjing Alas International Co., Ltd. is a professional industrial tooling manufacturer focused on shear blades, bending dies, shredder blades, and custom wear parts. We offer full application engineering, material selection, setup guidance, and after-sales support to global customers.
Tell us your requirements, and our engineering team will provide professional solutions for blade specification, tool life optimization, and cost-effective production.