Understanding the Speed Per Minute of Precision High Speed Presses

Updated on Aug 14,

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As electronic communication and various precision parts rapidly evolve, the demand for precision stamping parts is increasing significantly. This raises an important question: How fast can our precision high-speed press operate? How many cycles can a precision high-speed press complete in one minute? And how is this different from standard presses? This article seeks to provide answers.

Defining a Precision High Speed Press

Currently, there is no globally defined speed range for high-speed precision presses. Generally speaking, presses that boast stamping speeds five to ten times faster than ordinary presses are categorized as high-speed precision presses.

Speed Characteristics of Market-Available Precision High Speed Presses

Several factors can distinguish these presses:

1. Brand Differentiation

With rapid technological strides in stamping, focusing on high-speed, precision, and intelligence, the market has seen many new high-speed precision presses. Notable examples include products from German Raster Company, Munster Company in the USA, Swiss Bludel Company, German Schuler Company, and Japan's Nozori Product Company. These brands offer small-tonnage high-speed precision presses with impressive stroke rates such as 1,500 to 3,000 times per minute under load, meeting super precision standards.

Some companies classify small-tonnage high-speed precision presses into four speed levels based on slider strokes: normal speed (≤250 times/min), sub-high speed (250 to 400 times/min), high speed (400 to 800 times/min), and super high speed (≥800 times/min).

2. Press Type

- C-type high-speed punch: 200 to 1,000 times per minute
- Longmen high-speed punch: 200 to 1,500 times per minute. Notably, current advancements in domestic high-speed press technology in China can achieve speeds between 200 and 1,500 times per minute.

3. Tonnage of High-Speed Punches

- 25 tons typically operate at 200 to 1,000 times per minute
- 45 tons operate up to 1,500 times per minute
- 65-85 tons work efficiently around 300 times per minute.

Analyzing the Market for Precision High Speed Presses

Most companies find the average stroke speed to be most effective when it is set at a rate between the low and high range or 10-20% above the average. This is crucial because the high stroke count in high-speed presses typically refers to unloaded strokes. As the stroke count increases, operational imbalances become more pronounced, affecting accuracy and leading to dynamic changes at the bottom dead center of the slider. Factors such as coil quality, feed rate, mold performance and lifespan, equipment strength, and precision, as well as auto-monitoring, fault stability, vibration, noise, lubrication, and cooling systems, all need to be addressed. Thus, the rationality of stroke speed is critical to the effective use of high-speed precision presses.

One critical yet often overlooked aspect of the metal stamping process is using the shortest possible stroke for a given application. While many in the industry recognize this concept’s importance, its benefits are not always well understood.

With competitive pricing and timely delivery, Aomate sincerely hopes to be your supplier and partner.

The Stroke Length Dilemma in Stamping

Customers frequently request presses with longer strokes than necessary to ensure operational flexibility. While this may enable running multiple jobs in one press, it introduces several drawbacks.

This article will highlight why using the shortest stroke for stamping processes is ideal, starting with how longer strokes can negatively impact your bottom line.

The Hidden Costs of Using a Longer Stroke

Longer-than-needed strokes can negatively affect your processes in several ways:

• Wasted Time: A longer stroke includes unnecessary motion, leading to inefficiencies in throughput and quality.
• Increased Press Wear: Excessive stroke length increases wear on the press’s guides and internal structure, requiring more frequent maintenance and downtime.
• Increased Tool & Die Wear: Longer strokes result in higher impact velocities when the upper tooling meets the material, hastening tool wear or even causing premature breakage.
• Decreased Part Quality: These impacts can compromise the quality of finished parts, leading to higher rejection rates and increased costs.

Although the idea of a longer stroke might seem advantageous when considering future flexibility, the hidden costs must be weighed.

Advantages of Using the Shortest Stroke Possible

Implementing the shortest stroke possible in your stamping process can improve operational efficiency. Benefits include:

• Reduction in Wasted Stroke: Shorter strokes allocate more time for forming, which is crucial for producing high-quality parts.
• Less Dynamic Forces: A shorter stroke reduces harmful forces on the press frame and drive system, prolonging the lifespan of these components.
• Increased Tool Life: Less impact velocity with shorter strokes greatly enhances tool durability, reducing maintenance time and costs.

In summary, employing the shortest possible stroke improves throughput, extends tool life, and optimizes press performance, ultimately benefiting your bottom line.

The Most Optimal Stroke is Always the Shortest Stroke

Given the hidden costs associated with longer strokes, utilizing the shortest possible stroke is clearly advantageous. To determine the optimal stroke length for your application, consider the finished part requirements and the necessary feeding time.

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Sangiacomo Presses Americas is ready to help you optimize your stamping operations with our adjustable stroke press.

Still deciding? Contact us for answers to any questions or concerns.