Oblong Hole Punching Mold

The Oblong Hole Punching Mold is a high-precision die specially used for sheet metal processing, which is widely used in automobile manufacturing, electronic equipment, construction hardware and other industries. This die can efficiently and accurately punch out oval holes with smooth edges and consistent sizes, meeting the strict requirements of modern industry for precision processing.

 

Features

High durability
The main part of our mold is made of SKD11 mold steel or D2 high-grade tool steel, which are famous for their high hardness and excellent wear resistance. Through the quenching process, the mold hardness reaches HRC58-62, which can effectively resist the wear of long-term high-frequency stamping. In addition, the surface is nitrided to form a 0.1-0.2mm thick hardened layer, which greatly improves the corrosion resistance and fatigue resistance. Compared with ordinary molds, its life is extended by more than 30%.

 

High-precision processing
The processing accuracy of our molds is strictly controlled, and the punching size error does not exceed ±0.01mm, ensuring that the edge of the finished hole is burr-free and the appearance is smooth. Advanced CNC processing equipment and high-precision testing instruments are used in the mold manufacturing process to ensure that the quality of each mold meets the highest standards in the industry.

 

High-efficiency design
The mold structure is optimized to support multi-station continuous stamping, and a single stamping cycle takes only 0.5 seconds. Both the punch needle and the die adopt a modular design, which is convenient for quick replacement of accessories, significantly shortening downtime and improving the operation efficiency of the production line. Its average service life exceeds 300,000 times, which greatly reduces production costs.

 

Wide applicability
The Oblong Hole Punching Mold are compatible with a variety of materials, including cold-rolled steel, stainless steel, aluminum alloy and copper, and the applicable plate thickness ranges from 0.5mm to 6mm. Its flexibility meets a variety of needs from light sheet processing to heavy industrial material stamping.

 

Manufacturing Process

Material Selection
The first step in manufacturing Oblong Hole Punching Mold is to select the right raw material. High-strength mold steel, such as SKD11 or D2, is usually selected. These materials have high hardness, high toughness and excellent wear resistance, and are ideal materials for industrial molds. After the material enters the factory, it will undergo strict physical and chemical testing to ensure that its hardness, composition and tensile strength meet the standards, providing a stable foundation for subsequent processing.

 

Roughing
After the material is tested and qualified, it enters the roughing stage. The mold blank is preliminarily cut using a CNC milling machine and a lathe to complete the processing of the approximate shape. The key to this step is to minimize the stress concentration of the material as much as possible to create conditions for subsequent fine processing. The dimensional tolerance of the roughing stage is controlled within ±0.1mm to ensure the improvement of processing efficiency and accuracy in subsequent steps.

 

Heat Treatment
The roughed blank needs to be heat treated to enhance hardness and wear resistance. Heat treatment includes two steps: quenching and tempering:

Quenching: Rapidly heat the mold at high temperature (about 1020℃) and then quickly cool it to make the material hardness reach HRC58-62.

 

Tempering: Reheat at 200-300℃ to release the stress generated during quenching, while improving the toughness of the mold to avoid brittle cracking during use.

 

Finishing
The heat-treated blank enters the finishing stage. Through CNC machining centers, wire cutting and grinders, the punching needles, concave dies and other core components of the mold are accurately processed. The focus of this stage is on dimensional accuracy and surface finish.

 

Dimensional accuracy: The error of the punching part is controlled at ±0.01mm.

Surface treatment: The precision grinding process is used to make the mold surface roughness lower than Ra0.8, improving the smoothness during stamping and the quality of the finished product.

 

Surface treatment
After finishing, the mold will be surface treated to improve performance and service life.

Nitriding treatment: a hardened layer of 0.1-0.2mm is formed on the surface of the mold, which significantly improves wear resistance and corrosion resistance.

Polishing process: further improves the surface finish to ensure that the friction resistance during processing is minimized.

Assembly of accessories.

After the punch, die and other parts of the mold are tested and qualified, they enter the assembly stage. After assembly, the mold will be tested and debugged to ensure that the parts are accurately matched and the mold runs smoothly without jamming.

 

 

JPMX-303ESK / JPMX-503ESK / JPMX-803ESK

JPMX-303CSK / JPMX-303SK

JPMX-303DM / JPMX-303CM

 

 

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