Industry:Machine-tool component manufacturing
Department:Production Engineering

Internal Bore Surface Finishing Process Stood in Way of Productivity Increase

New solution stabilizes precision while slashing processing times.

Background

The manufacturer featured in this case study produces gearboxes for machine tools. After being asked by a client to increase production, it reviewed its production schedule and made plans to increase automation. However, the manufacturer realized that it would be unable to satisfy the client’s requirements with its existing setup.

Problem

The existing manufacturing method required operators to adjust the processing precision manually, so simply increasing the number of machines would not ensure stable production and—the long processing time made it difficult to significantly increase production.

The client had asked the manufacturer to increase component production from 15,000 to 25,000 units per month.

An employee from the Production Engineering Department recalls:

“After heat treatment, the components would undergo an internal bore surface finishing process performed using electrodeposition that took 60 seconds per unit. That time needed to be reduced to boost production. Also, as the electrodeposited abrasive surfaces became worn, internal bore diameters would get smaller, and surface roughness and cylindricality would get worse, requiring adjustments by an operator. As things stood, we were unable to increase production.”

While the Production Engineering Department had planned to increase automation to boost efficiency, it was not going well. The team subsequently held several discussions with the aim of improving the process, but no useful suggestions were made.

Summary of the problem

  • The use of electrodeposited abrasive coatings caused grinding precision to decline over time, requiring operators to perform frequent adjustments.

  • There were limits to reducing the processing time from 60 seconds per unit and increasing operational efficiency, making significant increases in production difficult.

  • The requirement for worker intervention created a bottleneck, making automation challenging.

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