Honing machine for finishing trochoidal bore of rotor housing of rotary engine

Claim 2

A honing machine for finishing a trochoidal bore of a workpiece by honing the inner wall surface thereof, comprising: a relatively stationary main body; a drive shaft rotatably born on said main body and provided with two integral gears; a honing head provided on its periphery with a plurality of stone slips which are biased outwardly into sliding contact with the inner wall surface of the workpiece for honing the same when rotatably received within the trochoidal bore; a cylindrical shaft having its axis arranged in parallel with the axis of said drive shaft and provided with an integral gear; a honing-head shaft coaxially secured to said honing head and coaxially received in said cylindrical shaft, said honing-head shaft being axially movable within said cylindrical shaft for bringing said honing head into and out of the trochoidal bore but being forced to rotate integrally with said cylindrical shaft; a first intermediate idle gear meshing with one of the gears of said drive shaft and with the gear of said cylindrical shaft for transmitting rOtational motion from said drive shaft to said honing head by way of said cylindrical shaft and honinghead shaft; a machine table for holding the workpiece in position; a table shaft coaxially secured to said machine table and provided with an integral gear, said table shaft having its axis arranged eccentrically of the axis of said honing-head shaft but in parallel with the axis of said drive shaft; a second intermediate idle gear meshing with the other gear of said drive shaft and with the gear of said table shaft for transmitting rotational motion from said drive shaft to said machine table by way of said table shaft, the direction of rotation of said honing head being the same as that of said machine table, and the ratio of speed of rotation of the former to that of the latter being predetermined, so that the former moves relative to the latter in a manner to draw a preset trochoidal curve; and eccentricity control means for finely controlling eccentricity between the axes of said honing head shaft and table shaft.

Claim 3

A honing machine according to claim 1, further comprising: head-position control means connected to said honing-head shaft for hydraulically moving said honing head along the axis thereof in a first position, at which the stone slips of said honing head are in sliding contact with the inner wall of said trochoidal bore, and into a second position, at which said honing head is apart from said trochoidal bore in a standby position; and locking means for locking said head-position control means to hold said honing head at the second position.

Claim 4

A honing machine according to claim 1, wherein said eccentricity control means includes a bolt threaded into said stationary main body and adapted to be turned for dislocating said table shaft relative to said honing-head shaft.

Claim 5

A honing machine according to claim 1 which further comprises means for moving the second intermediate idle gear with respect the other gear of said drive shaft with the clearance between the other gear of said drive shaft and the second intermediate idle gear maintained substantially constant.

Claim 6

A honing machine for finishing a trochoidal bore of a workpiece by honing the inner wall surface thereof, comprising: a relatively stationary main body; a drive shaft rotatably born on said main body and provided with two integral gears; a honing head provided on its periphery with a plurality of stone slips which are biased outwardly into sliding contact with the inner wall surface of the workpiece for honing the same when rotatably received within the trochoidal bore; a cylindrical shaft having its axis arranged in parallel with the axis of said drive shaft and provided with an integral gear; a honing-head shaft coaxially secured to said honing head and coaxially received in said cylindrical shaft, said honing-head shaft being axially movable within said cylindrical shaft for bringing said honing head into and out of the trochoidal bore but being forced to rotate integrally with said cylindrical shaft; a first intermediate idle gear meshing with one of the gears of said drive shaft and with the gear of said cylindrical shaft for transmitting rotational motion from said drive shaft to said honing head by way of said cylindrical shaft and honing-head shaft; a machine table for holding the workpiece in position; a table shaft coaxially secured to said machine table and provided with an integral gear, said table shaft having its axis arranged eccentrically of the axis of said honing-head shaft but in parallel with the axis of said drive shaft; a second intermediate idle gear meshing with the other gear of said drive shaft and with the gear of said table shaft for transmitting rotational motion from said drive shaft to said machine table by way of said table shaft, the direction of rotation of said honing head being the same as that of said machine table, and the ratio of speed of rotation of the former to that of the latter beinG predetermined, so that the former moves relative to the latter in a manner to draw a preset trochoidal curve; eccentricity control means for finely controlling eccentricity between the axes of said honing head shaft and said table shaft; detecting means responsive to the rotational motion of said honing head relative to said machine table for detecting the angular positions of the stone slips of said honing head relative to the inner wall surface of the trochoidal bore; bias-pressure control means for controlling the bias pressure of said stone slips toward said inner wall surface; a pressurized fluid source communicating with said bias-pressure control means for supplying thereto a liquid under pressure; and change-over means provided between said bias-pressure control means and said pressurized fluid source and responsive to the relative angular positions of said stone slips for changing the communication of said pressurized fluid source with said bias-pressure control means, whereby the bias pressure of said stone slips are controlled in dependence upon the relative angular positions of said stone slips.

Claim 7

A honing machine for finishing a trochoidal bore of a workpiece by honing the inner wall surface thereof, comprising: a relatively stationary main body; a drive shaft rotatably born on said main body and provided with two integral gears; a honing head provided on its periphery with a plurality of stone slips which are biased outwardly into sliding contact with the inner wall surface of the workpiece for honing the same when rotatably received within the trochoidal bore; a cylindrical shaft having its axis arranged in parallel with the axis of said drive shaft and provided with an integral gear; a honing-head shaft coaxially secured to said honing head and coaxially received in said cylindrical shaft, said honing-head shaft being axially movable within said cylindrical shaft for bringing said honing head into and out of the trochoidal bore but being forced to rotate integrally with said cylindrical shaft; a first intermediate idle gear meshing with one of the gears of said drive shaft and with the gear of said cylindrical shaft for transmitting rotational motion from said drive shaft to said honing head by way of said cylindrical shaft and honing-head shaft; a machine table for holding the workpiece in position; a table shaft coaxially secured to said machine table and provided with an integral gear, said table shaft having its axis arranged eccentrically of the axis of said honing-head shaft but in parallel with the axis of said drive shaft; a second intermediate idle gear meshing with the other gear of said drive shaft and with the gear of said table shaft for transmitting rotational motion from said drive shaft to said machine table by way of said table shaft, the direction of rotation of said honing head being the same as that of said machine table, and the ratio of speed of rotation of the former to that of the latter beinG predetermined, so that the former moves relative to the latter in a manner to draw a preset trochoidal curve; eccentricity control means for finely controlling eccentricity between the axes of said honing head shaft and said table shaft; detecting means responsive to the rotational motion of said honing head relative to said machine table for detecting the angular positions of the stone slips of said honing head relative to the inner wall surface of the trochoidal bore; bias-pressure control means for controlling the bias pressure of said stone slips toward said inner wall surface; a pressurized fluid source communicating with said bias-pressure control means for supplying thereto a liquid under pressure; and change-over means provided between said bias-pressure control means and said pressurized fluid source and responsive to the relative angular positions of said stone slips for changing the communication of said pressurized fluid source with said bias-pressure control means, whereby the bias pressure of said stone slips are controlled in dependence upon the relative angular positions of said stone slips.

Claim 8

A honing machine according to claim 5, further comprising pneumatic damping means provided between said change-over means and said bias-pressure control means and including an air chamber for pneumatically damping the bias pressure of said stone slips irrespective of the variation of said bias pressure.