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Punching

CNC Punching Services

Punching services provided by RJC can increase product lines to include punched assemblies and high volume sheet metal fabrication. It is cost-effective for cutting sheet metal in prototypes, low- to high-volume production. Metal punching creates multiple shaped holes, punching out a series of basic shapes. The basic shape can be a circle, square, rectangle. The punch is selected from a guide rail under CNC control. Turret punches have punching, tapping, and wheel forming capabilities. All operations are scheduled and prioritized electronically.

Metal stamping equipment is set up as a separate unit; the material is loaded into the CNC turret punch’s unique automated system, machined (punched), unloaded back onto pallets, and transferred to the following process: forklift. The automation used in this unit enables lights-out operations, which helps reduce costs and maximize capacity. Another benefit of using the turret stamping process is that the edges are usually perfect due to the shearing action of the turret.Our CNC punches have higher machining speeds, so in most cases can give you cheaper machining costs.

Another advantage of CNC stamping is producing shapes into sheet metal parts, eliminating the need for secondary operations on the press. These include dimples, slits, forming tools for cable ties and locating labels, knockouts for electrical outlets, shutters, ribbing, extruded and stamped tapped holes, and integral hinges.

The MD&M East Exhibition Ended Perfectly
The MD&M East Exhibition Ended Perfectly
The MD&M East Exhibition Ended Perfectly

We provide CNC stamping services to our customers. We can cut sheets, punch holes and even provide profile cutting services. These punches meet leading international quality standards. Our services are precisely designed to the needs of our clients and are available at nominal prices. Made from quality approved raw materials, these products are specially designed to meet the dynamic requirements of the industry for error-free operation and superior performance at nominal rates and customer requirements.

What is Turret Punching?

Turret punching is a process by which shapes are punched into sheet material to create parts.
The shapes are selected from a CNC-controlled turret and are then successively hole-punched into the workpiece.

The MD&M East Exhibition Ended Perfectly

Types

There are two processes available for punching services: sheet punching and coil punching.

  • Sheet punching is used for rectangular pieces as well as highly complex shapes. A sheet-fed punching press can be used to create unique pieces obtained from the same sheet, but it produces 10- 20% waste since the full sheet can’t be used. Blanks can be sheared to size to minimize waste, but the cut blanks cost more money. It is used for small production lines (from 1 to 50 pieces). Sheet-fed punching machines require constant operator presence for loading and unloading the workpieces, or the system can have robotized loading and unloading, although that requires a more significant investment.
  • Coil punching is used for high volume production with two sides corresponding to the sides of the coil. Mass production can be used for pieces that are different from each other but are part of the same family, such as door frames produced as single pieces with a similar punch but different sizes. The machine works metal strips from coils from service centers with the correct width, reducing the waste to 1%. Coil punching machines produce the workpieces automatically, and an operator is only needed to load the coils and unload pallets. They have a 20-30% lower hourly cost than a sheet-fed punching machine. The production time is also less because the material does not need to be loaded or unloaded.

Tool Shape

The punch can come in a variety of sizes and shapes. Three common shapes include a circle, oval, and square, but can be customized based on design.

Punching presses can also create patterns and cuts in the sheet metal and designs along the edges. These processes are known as perforating and notching, respectively.

Material

The material is usually a sheet but it may also be in rolls.

Metal components can be formed using a punch. The punch is usually the upper member of the complete die assembly and is mounted on the slide or in a die set for alignment (except in the inverted die).

Plastic pieces are usually scrap materials, such as tails, molding flash and slugs from bottles, which need to be removed from the workpiece.

Paper and related products such as those used for labels can be self-adhesive or plastic laminated

Applications

Punching is used for various industries, including manufacturing, food and beverage, and healthcare. The process allows the final piece to have a contoured shape, including cut and rounded corners. Due to the high flexibility of punching, the process is used to create labels for food and drinks, cosmetics, medicine, and detergent. Punching can also create novelties such as credit cards, playing cards, passports, and glued notepads.

The MD&M East Exhibition Ended Perfectly
The MD&M East Exhibition Ended Perfectly
The MD&M East Exhibition Ended Perfectly
The MD&M East Exhibition Ended Perfectly

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