MPI’s Hydraulic & Pneumatic Device Capabilities
- Including components used in:
- Hydraulic Pumps
- Hydraulic Motors
- Servo Valves
- Proportional Valves
- Electric Displacement Control Valves
During a recent “bake off” between competing processes at a major hydraulic valve manufacturer, MPI fineblanking was selected over stamping, machining, powdered metal, and investment casting. Fineblanking was not only cost effective, but also provided the highest quality results.
One reason for our success in the hydraulic arena is our low cost structure. Another is that we have access to the full array of secondary processes required to produce valve plates, pole pieces, pivot plates, etc., including double disc grinding, milling, tapping, heat-treating, brazing, broaching, and annealing.
Here are some examples of benefits provided to our hydraulic device customers:
|Type of part
||Part specification in inches
||Cost and Quality Benefits
||Part of the magnetic circuit of the valve
||Flatness .005 Form height. .002
||Cost – Surface features added at no cost include embossing and forming. Quality -Full Cpk analysis of critical
||Beryllium Copper Pivot used in control valve
||Profile tolerance .005 Flatness .001 True position .004
||Cost – Lowest cost process option. Quality – Valve linearity improved by maintaining close tolerances. Most consistent process piece-to-piece and lot-to-lot.
||Bimetal Plate used in hydraulic pump
||Cost – Multiple machining operations
eliminated by fineblanking. Quality – Improved flatness aided secondary grinding operation.
|Self Retaining Gasket
||Flatness .001 16 micro finish, profile tolerance .001
||Cost – Eliminated a grinding operation. Quality – flatness and surface finish ensured a leak-free seal.
||External Pump Speed Control Lever
||Internal profile .002
||Cost – Fineblanking eliminated forming and broaching operations. Quality – Improved true position of
||Precision Orifice for pneumatic device
||Hole tolerance .001
||Cost – Fineblanking eliminated secondary
reaming operation. Quality – Improved consistency of hole diameter from Cpk=1.1 to Cpk =2.7