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Home » IMPCO Reports Machine Order from EV OEM

IMPCO Reports Machine Order from EV OEM

IMPCO-3.jpg

IMPCO skilled trades celebrate recent order from EV OEM for shaft microfinishing systems. Shown in the image is one of the systems.

July 20, 2022

IMPCO Machine Tools, Lansing, Mich., received orders for five microfinishing systems to be delivered to the OEM plants in Mexico and the USA. Order total is $3.5 million. Each robot-loaded system is designed to microfinish the bearing diameter to millionths of an inch (1 µm) on a family of 300 mm rotor shafts used in the drivetrain of electric vehicles.

“Our process is a highly refined process that permits essential rotating components to operate efficiently with minimum frictional loss through noise and vibration for extended duty cycles,” said Mark Hendel, IMPCO global sales director. The IMPCO Standard 540 Series Microfinishing Systems will perfect surface finish, roundness, and straightness of the bearing journals on the shafts at production rates greater than 100 parts an hour. Machine flexibility is key in today's market, so having the ability to change over between part types in less than 10 min. allows for future product design flexibility.

“We began our work on this project more than 2 years ago in our R&D lab, working with the customer on the critical points on bearing journal design including geometry and surface finish, we then proved our process on the customer parts, further refining of the process to meet NVH (noise and vehicle harshness) goals to assure minimum noise when the motor is running. NVH standards are critical in electric vehicles,” Hendel said.

In operation, IMPCO Microfinishing removes the microscopic amorphous surface material left from the grinding of a dimensionally finished shaft-type part, such as a crankshaft, camshaft, or pump shaft, to permit a highly precise fit to a mating part. The process controls surface finish, roundness, and straightness to microns--mere millionths of an inch—tolerances unattainable with grinding.

“Generating the final functional part surface texture and geometry, IMPCO microfinishing is the key to friction reduction, higher performance, longer durability, and greater reliability of precision shafts,” an IMPCO spokesperson said. The patented IMPCO Generating Bearing Quality (GBQ) process typically removes less than 10 microns of material using as a cutting media a non-compressible abrasive tape.

The tape is pressed against the surface by a non-compressible tool that is designed to conform dimensionally to the component. The tool consists of two hard shoes which are held in tool-holders attached to two hydraulic arms. The arms are closed at a set pressure before the cycle begins. The bearing component is rotated and oscillated between centers for a defined period – typically less than 10 sec. Fresh tape is incrementally indexed after each process cycle to ensure a consistent cutting edge from one part to the next and reduce material build up at the edge of the tape.

The company employs more than 50 in Michigan designing and building special automated machines that polish camshaft, crankshaft, and other precision load bearing journals for drivetrain manufacturers worldwide. The IMPCO Microfinishing process helps its users, including all major automotive OEM, deliver smoother operating, longer lasting, and more efficient drivetrains.

“Today we are positioned at the forefront of microfinishing technology and have become the global reference for microfinishing,”” said Hendel. “This all started 55 years ago when IMPCO designed, built, and delivered the world’s first automated microfinishing machine in response to a request from Chrysler Corporation for polishing its new V-8 engine crankshaft. Since then, IMPCO has developed strong relationships with licensees and agents worldwide.”

impco.com


Industry News
KEYWORDS bearings IMPCO Machine Tools microfinishing
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