Linmo rotary-table grinding: choose the wheel contact and the holding method

Start with the surface that the wheel must finish

MP7363A · horizontal spindle

Peripheral contact for the two-face route

The exact model description lists a 630 mm worktable. Its table rotates on the bed guideway; the carriage traverses along a twin-column crossbeam and the grinding head feeds vertically. Grinding uses the wheel periphery.

For a disc, blade blank, ring or plate with two controlled faces, specify how the first face becomes the reference for the second. The manufacturer's description of two-face parallelism does not mean both faces are ground simultaneously or without turning the part over.

Open MP7363A reference ↗

MP7440 · vertical spindle

Wheel-face contact with a magnetic table

The exact model page lists a 400 mm worktable and wheel-face grinding. It describes a circular electromagnetic chuck with smoothly adjustable holding force, electrical magnetizing/demagnetizing and coolant purification.

First check whether the material and its contact area can be held magnetically. A nonmagnetic part, a small interrupted contact footprint or a tall part needs a separately agreed fixture and process. The catalogue's broad material/industry list is not proof that one standard magnetic setup suits all of them.

Open MP7440 reference ↗

A flat surface on the magnet can spring back after release

For a thin disc or plate, separate holding security from elastic deformation. Describe the incoming bow, thickness, hardness and the support/contact pattern. Ask the supplier to establish enough holding force for the proposed cut while avoiding a setup that pulls the blank into a temporary shape.

Ferromagnetic, broad contact

Trial the actual chuck pole arrangement, stops and magnetizing setting with the intended stock allowance. Check that the part remains secure through grinding and wheel withdrawal; a magnetic-force figure does not replace this loaded-part test.

Thin, bowed or interrupted contact

Specify support locations and a staged removal plan. Keep incoming and released flatness measurements. If the first face is used to locate the second, clean the support/chuck face and show how it contacts the finished reference without trapping abrasive debris.

Nonmagnetic or mechanically held

Request a fixture drawing with clamp forces, wheel access and sweep clearance. Prove released shape and surface relationships with that fixture. Do not assume the standard electromagnetic arrangement can hold glass, ceramic or every stainless alloy.

Agree demagnetizing, safe release, cleaning and residual-magnetism acceptance for the downstream process. For a part that will be assembled or inspected elsewhere, the relevant result is its free condition after removal from the chuck.

Quote a grinding recipe, not just a spindle arrangement

Accept the part after grinding, demagnetizing and cooling

1. Measure the incoming blank

   Record flatness/bow, face allowance, thickness and material/hardness. Identify the drawing's measuring datums, supports and surface-finish requirement. Use the difficult blank condition rather than an unusually flat demonstration piece.

2. Run the complete two-face or one-face route

   Retain the wheel, dressing state, fixture/chuck setting, infeed, coolant and spark-out. Where both faces matter, include the actual turnover and second-face locating method. Time loading, dressing, cooling and release as well as grinding.

3. Inspect in the free condition

   After demagnetizing, cleaning and the agreed temperature stabilization, measure flatness, parallelism, thickness distribution and finish with the specified method. Check grinding damage or residual magnetism where the drawing/process requires it. The magnetically held surface alone is not the acceptance result.

4. Repeat through a dressing interval

   Use the intended batch and part mix, include wheel wear and a stop/restart, and retain accepted/rejected counts. Agree the inspection frequency and any destructive or surface-integrity checks needed for the material.

The MP7440 text gives an imprecise roughness expression and a parallelism claim without the test-piece conditions or measurement procedure. Use a written drawing-specific acceptance plan; neither entry is a universal warranty for your released part.

Keep the new-machine, customized-process and repair scopes separate

Shandong Linmo's introduction identifies its Linqing business as rotary-table surface grinders, other surface-grinding arrangements, customized special grinders and machine repair. Its catalogue separates horizontal/vertical rotary-table grinding, rectangular-table grinding and shear-blade forming equipment. These two references cover distinct rotary-table routes; they do not substantiate the specifications of the broader semiconductor or compound-grinding families.

The introduction describes a team drawn from the former Linqing grinder operation. That heritage is different from the present contracting entity's incorporation date. The reviewed introduction also describes regional service offices; establish support for the destination and supplied machine in the contract.