Can loading a stamping press be automated?

Press tending removes a person from the most dangerous position in most metal shops. That is usually the real justification, and it is a good one.

Free, about two minutes, no phone number. You get an honest no when a robot is the wrong answer.

What the job actually is

An operator places a blank in the die, actuates the press, and removes the formed part, often with tongs and a two hand control. It is repetitive, fast, and the consequence of a mistake is severe.

Signs it is worth automating

• Somebody hand feeds a press all shift.
• You have an injury history, an insurance driver, or a near miss on this operation.
• Runs are long enough that die changes are not constant.
• Blanks are flat, consistent and can be destacked reliably.

What the cell looks like

A 10 to 50 kg class arm with a magnetic or vacuum end effector, interlocked to the press control so the arm and ram can never occupy the die at the same time. Part presentation and scrap handling both need designing. This is a fenced application in nearly every case.

This is one job inside a bigger family. The cnc machine tending guide covers the equipment classes, the cost ranges, and the disqualifiers for all of it.

When the answer is no

• Your die changes several times a shift and each requires new tooling and teaching.
• Blank destacking is unreliable because sheets stick together and you have no fanner or double blank detection budget.
• Runs are short prototype batches rather than production quantities.
• You are hoping to automate around a guarding problem. Fix the guarding first, with your safety resources.

What an engineer has to verify

• Press control interlock capability and who signs off the safety circuit.
• Blank destacking method and double blank detection.
• Part removal path and scrap or slug handling.
• Die change frequency and what the robot needs to change with it.
• Cycle rate the press actually runs at versus the robot's achievable rate.

Safety is not on that list because it is not ours to determine. Cell design, guarding and the risk assessment belong to an independent certified integrator, every time.

What the research says

Peer reviewed work from our research library on this application. These are studies of other plants and other settings, not a prediction about yours, and the excerpts are the authors' own words. Every title links to the source so you can check us.

• Robotical Automation in CNC Machine Tools: A Review Mohsen Soori et al. (2024), Acta Mechanica et Automatica

  From the abstract: “Robotics and automation have significantly transformed Computer Numerical Control (CNC) machining operations, enhancing productivity, precision, and efficiency.”

• Review of current vision-based robotic machine-tending applications Feiyu Jia et al. (2024), The International Journal of Advanced Manufacturing Technology
• Reliability Prediction and FMEA of Loading and Unloading Truss Robot for CNC Punch Kaiyue Zhang et al. (2023), Applied Sciences

  From the abstract: “Loading and unloading truss robot for computer numerical control (CNC) punch is widely used in the production of sheet metal parts, as its reliability level is directly related to the quality of sheet metal parts.”

• Development of Digital twin for Plug-and-Produce of a Machine tending system through ISO 21919 interface Yong-Keun Park et al. (2023), International Journal of Computer Integrated Manufacturing

  From the abstract: “The introduction of robot-assisted automation, such as in machine tending systems for the automated operation of CNC machine tools, is being actively carried out at many industrial sites.”

• Lights-out factories: Review and prospect Ruikang Wang et al. (2024), Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture

  From the abstract: “Lights-out factories represent the pinnacle of manufacturing advancement, utilizing automation, digitalization, and intelligent technologies for unmanned production.”

The full machine tending shelf has 10 works.

Someone has already done this

See it run

Two clips of this job actually running, from two different manufacturers. Both are the makers' own marketing footage, showing a cell under good conditions with a part it was set up for, so watch them for what the motion looks like rather than as evidence of what your rate would be.