Mattison Multi-Spindle Grinding Machine

Re-Engineered Mattison Vertical Disc Grinder

Mattison Grinder Specialist

When Mattison Machine Works went out of business C&B Machinery took advantage to utilize the talented employees that were suddenly available and started a new division specializing in the remanufacturing of Mattison grinders. The core design of a Mattison vertical grinder is optimal for heavy stock removal, high production volumes, and high precision when grinding the faces on a dedicated product.

C&B Machinery has re-engineered the Mattison feed systems to incorporate the latest technologies such as a servo-driven ball screw feed system. This also eliminated a majority of the complex mechanical moving components which results in much less maintenance-related downtime.

CB5V-100-M

(Mattison 100C-5)

C&B remanufactured this machine to grind very large, non-coplanar connecting rods. This machine was designed for hand or robot load.  The challenge was high stock removal along with a tight tolerance all while controlling the step relationships. The tooling was designed to allow for a quick part changeover.

Machine Details:

  • Re-Engineered: Mattison 100C-5, Vertical Five Spindle Disc Grinder
  • Six servo axis
  • Tooling including index table and fixture pockets
  • 40 Hp spindle, 1160 RPM / 5464 SFPM
  • Updates included: Ball Screw in-feeds, Allen-Bradley controller
  • In-process Gauging for each head
  • Machine weight 84,000 Lbs

Part Description:
Connecting Rod, Engine – coplanar

Grinding Operation:
Rough Grind two faces

Material:
Steel Forging

Stock removal:

.8mm per side – Part size approximately 560mm long x 200mm wide x 67mm

Grinding Process Parameters:
Size tolerance: +/- .076mm
Parallelism: .075mm
Beam Centrality: +/- .038mm

Machine Acceptance Criteria:
Parts per hour 240 @100% capacity
    Compressor Cylinder Heads

    CB3V-72-M

    (Mattison 72C-3)

    Machine Details:

    • Mattison 72C-3, Vertical Three Spindle Disc Grinder
    • Three servo axis
    • Tooling including index table and (3) different groups of fixture pockets to cover the family of parts
    • 40 Hp spindles, 870 RPM / 4900 SFPM
    • Updates included: Ball Screw in-feeds, Allen-Bradley controller

    • In-process gauging

    Part Description: 
    Cylinder Head, Compressor – Five different part numbers

    Grinding Operation:
    Finish Grind one face (gasket surface)

    Material: 
    Cast SAE J431

    Hardness:
    170-241 Brinell Heat Treatment: N/A

    Stock removal: 
    2.5mm, part size approximately 114mm x 114mm x 47mm thick

    Grinding Process Parameters:
    Size tolerance: +/- .381mm 4.94 Cpk
    Micro finish required: 2.0 Ra
    Flatness Overall: .05mm 5.32 Cpk
    Flatness Elemental: .025mm zone Z 2.31 Cpk
    Profile: .127mm

    Machine Acceptance Criteria:
    Parts per hour 620 @100% capacity
    Machine run-off spec: Ppk: 1.67

                     CB4V-72-M

               (Mattison 72C-4)

      C&B reworked the Mattison 72C-4 to grind connecting rods. This machine type was ideal for that project because this type of machine offers a tight tolerance control by having one side of the part fixed to the rigid work table. Stepped or equal side rods can be ground on this machine by simply swapping out the tooling fixtures on the table.

      Machine Details:

      • Re-Engineered: Mattison 72C-4, Vertical Four Spindle Disc Grinder
      • Four servo axis
      • Tooling including index table and fixture pockets
      • 40 Hp spindle, 880 RPM / 4147 SFPM
      • Updates included: Ball Screw in-feeds, Allen-Bradley controller
      • In-process Gaging for each head

      Part Description:
      Connecting Rod, Engine – coplanar

      Grinding Operation:
      Rough Grind two faces

      Material:
      Forging CS 280

      Hardness:
      45-50 Rc

      Stock removal:
      .558mm per side – Part size approximately 221mm long x 88.2mm tall x 21mm thick

      Grinding Process Parameters:
      Size tolerance: +/- .05mm
      Flatness Overall: .10mm
      Beam Centrality: +/- .10mm

      Machine Acceptance Criteria:
      Parts per hour 600 @100% capacity

        CB5V-100-M
        (Mattison 100C-5)

        Machine Details:

        • Model 100C-5 Multi-spindle Vertical Grinding Machine
        • Five independent grinding heads powered by AC Servo driven precision ball screws.
        • Tooling for multiple families of parts.
        • Pushbutton changeover.
        • Automatic gauging with size control feedback.
        • Elimination of 80% of the machine’s hydraulics and 60% of the wheel head moving parts.

          Part Description: 
          Motorcycle Connecting Rods

          Grinding Operation: 
          Finish grind Non-Coplanar Widths

          Material: 
          Powdered Metal

          Stock removal: 
          2.5mm total

          Grinding Process Parameters:
          Crank End Width: 19.0 ± .05 mm 1.67 Ppk
          Pin End Width: 28.0 ± .05 mm 1.67 Ppk
          Flatness: .05 mm 1.67 Ppk
          Parallel .05 mm 1.67 Ppk
          Surface Finish: .6 Ra Within 70%

          Machine Acceptance Criteria:
          Parts per hour 400 @100% capacity
          Machine run-off spec: Ppk: 1.67

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