초록 ▼

A method is provided for machining the fire deck of an engine block. The method includes providing a grinding wheel having an outer annular grinding element disposed concentrically or the wheel may be provided with an inner annular grinding element disposed concentrically inward of an outer element.

A method is provided for machining the fire deck of an engine block. The method includes providing a grinding wheel having an outer annular grinding element disposed concentrically or the wheel may be provided with an inner annular grinding element disposed concentrically inward of an outer element. The outer element comprises a single layer of relatively coarse diamond abrasive brazed on a metallic substrate, while the inner element comprises a single layer of relatively fine diamond abrasive brazed on a similar substrate. The outer grinding element and the inner element if utilized, is formed as a discrete unit individually fastened to a backing plate to facilitate independent height adjustment of the elements relative the backing plate. The method further comprises orienting the grinding wheel with its axis of rotation at a predetermined oblique angle a relative the fire deck. The wheel is then translated towards the engine block along a tool path parallel to the fire deck wherein the outer ring will engage the block for bulk material removal, followed by the inner ring, if utilized, which removes a smaller amount of material to apply the requisite surface finish to the fire deck.

대표청구항 ▼

[ Having thus described the invention, what is claimed is:] [1.] A method for grinding a fire deck of a bimetallic engine block, said method comprising the steps of:(a) providing a grinding cup wheel having an axis of rotation and a first annular grinding element disposed concentrically on said whee

[ Having thus described the invention, what is claimed is:] [1.] A method for grinding a fire deck of a bimetallic engine block, said method comprising the steps of:(a) providing a grinding cup wheel having an axis of rotation and a first annular grinding element disposed concentrically on said wheel, said first annular grinding element comprising an abrasive component chosen from the group consisting of metal brazed single layer abrasive components and abrasive components comprising grain bonded in a porous matrix having about 55 to 80 volume percent interconnected porosity;(b) orienting the axis of rotation at a predetermined angle .alpha. relative to the fire deck;(c) translating said grinding cup wheel towards the engine block along a tool path parallel to the fire deck, wherein said first annular grinding element engages and abrasively grinds material from the block.