Precision boring machine

Claim 2

A precision boring machine comprising a bed; a frame secured on said bed; a work table for fastening the workpieces sliding along said bed during boring operations; at least one spindle head with the spindle rigidly secured on the plane of said frame and facing said table so that said head, without moving relative to the machine''s movable parts is constantly arranged between said frame and the work table, said spindle head being fastened on the frame surface facing said work table so that said spindle head is located between said frame and work table; and means incorporated in said frame for compensating for the thermal deformations of said frame, due to operation of said spindle, and thermal deformations of said spindle head whereby the spindle is maintained substantially true to an adjusted position in spite of operational heat of the machine.

Claim 3

A precision boring machine comprising a bed; two frames secured on said bed; a work table for fastening the workpieces sliding along said frame during boring operations; two spindle heads with spindles rigidly secured on the plane of a corresponding frame, facing said work table so that both said spindle heads, without moving with regard to the machine''s immovable parts, are constantly positioned between said frames and the work table, secured, each, on the surface of the corresponding frame, said surface facing the work table so that both spindle heads are located between said frame and work table; means compensating for the thermal deformations of the machine.

Claim 4

A precision boring machine comprising a bed; two frames secured on said bed; a work table for fastening the workpieces sliding along said frame during boring operations; two spindle heads with spindles rigidly secured on the plane of a corresponding frame, facing said work table so that both said spindle heads, without moving with regard to the machine''s immovable parts, are constantly positioned between said frames and the work table, secured, each, on the surface of the corresponding frame, said surface facing the work table so that both spindle heads are located between said frame and work table; means compensating for the thermal deformations of the machine.

Claim 5

A precision boring machine comprising a bed; a frame secured on said bed; a work table for fastening the workpieces sliding along said bed during boring operations; at least one spindle head with the spindle, fastened on the frame surface facing said work table so that said spindle head is located between said frame and work table; means compensating for the thermal deformations of the machine, comprising hollow supporting pillars of said frame; liquid filling said frame pillars; transmitters registering the displacement of the shaft of said spindle of the spindle head and located on each of said spindle heads; transmitters registering the displacement of said frame due to thermal deformations and located in the spaces of said frame pillars; heating means located in said spaces of said frame pillars, connected with said transmitters registering the displacement of the spindle shaft and frame; said heating means are energized by the signals sent by said transmitters and, heating said liquid, create additional thermal deformations of the machine which compensate for the displacement of the shaft of said spindle in a required direction.

Claim 6

A precision boring machine comprising a bed; a frame secured on said bed; a work table for fastening the workpieces sliding along said bed during boring operations; at least one spindle head with the spindle, fastened on the frame surface facing said work table so that said spindle head is located between said frame and work table; means compensating for the thermal deformations of the machine, comprising hollow supporting pillars of said frame; liquid filling said frame pillars; transmitters registering the displacement of the shaft of said spindle of the spindle head and located on each of said spindle heads; transmitters registering the displacement of said frame due to thermal deformations and located in the spaces of said frame pillars; heating means located in said spaces of said frame pillars, connected with said transmitters registering the displacement of the spindle shaft and frame; said heating means are energized by the signals sent by said transmitters and, heating said liquid, create additional thermal deformations of the machine which compensate for the displacement of the shaft of said spindle in a required direction.

Claim 7

A precision boring machine comprising a bed; two frames secured on said bed; a work table for fastening the workpieces sliding along said frame during boring operations; two spindle heads with spindles, secured, each, on the surface of the corresponding frame, said surface facing the work table so that both spindle heads are located between said frame and work table; meanS compensating for the thermal deformations of the machine, comprising hollow pillars of said frames; liquid filling said pillars; transmitters registering the displacement of the shaft of said spindles of spindle heads and located on each of said spindle heads; transmitters registering the displacement of said frames due to thermal deformations and located in said spaces of hollow frame pillars; heating means located in said spaces of frame pillars and connected with said transmitters registering the displacement of the spindle shaft and frame; said heating devices are energized by the signals sent from said transmitters and, heating said liquid, create additional thermal deformations of the machine which compensate for the displacement of the shaft of said spindle.

Claim 8

A precision boring machine comprising a bed; two frames secured on said bed; a work table for fastening the workpieces sliding along said frame during boring operations; two spindle heads with spindles, secured, each, on the surface of the corresponding frame, said surface facing the work table so that both spindle heads are located between said frame and work table; meanS compensating for the thermal deformations of the machine, comprising hollow pillars of said frames; liquid filling said pillars; transmitters registering the displacement of the shaft of said spindles of spindle heads and located on each of said spindle heads; transmitters registering the displacement of said frames due to thermal deformations and located in said spaces of hollow frame pillars; heating means located in said spaces of frame pillars and connected with said transmitters registering the displacement of the spindle shaft and frame; said heating devices are energized by the signals sent from said transmitters and, heating said liquid, create additional thermal deformations of the machine which compensate for the displacement of the shaft of said spindle.

Claim 9

A machine according to claim 3 wherein the function of the transmitters registering the displacement of the spindle shaft is performed by temperature transmitters.

Claim 10

A machine according to claim 4 wherein the function of the transmitters registering the displacement of the spindle shaft is performed by temperature transmitters.

Claim 11

A precision boring apparatus comprising: a bed; a frame projecting vertically above said bed; said bed including a work table thereon for mounting a work piece for movement toward and away from said frame in the plane of said bed during boring operations; a spindle head suspended from the under surface of said frame in spaced, overlying relation to said work table; said spindle head including a spindle projecting from said spindle head in parallel relation to the plane of said work table for engagement with the work piece; said frame comprising an arched member straddling and including pillars depending on each side and spaced from said spindle head whereby heat generated and transmitted from said spindle is not directly transmitted to said pillars, whereby thermal deformations are substantially eliminated at said spindle head, said frame and spindle substantially eliminating theremal deformation of said spindle relative to the work table.

Claim 12

A precision boring apparatus comprising: a bed; a frame projecting vertically above said bed; said bed including a work table thereon for mounting a work piece for movement toward and away from said frame in the plane of said bed during boring operations; a spindle head suspended from the under surface of said frame in spaced, overlying relation to said work table; said spindle head including a spindle projecting from said spindle head in parallel relation to the plane of said work table for engagement with the work piece; said frame comprising an arched member straddling and including pillars depending on each side and spaced from said spindle head whereby heat generated and transmitted from said spindle is not directly transmitted to said pillars, whereby thermal deformations are substantially eliminated at said spindle head, said frame and spindle substantially eliminating theremal deformation of said spindle relative to the work table.

Claim 13

The apparatus as claimed in claim 7 in which said pillars include means automatically sensing and compensating for thermal deformation of said spindle head and spindle relative to the work table.

Claim 14

The apparatus as claimed in claim 8 in which said means automatically compensating for thermal deformation comprises heat-transmitter means and heating means intimate with said pillars whereby deformation due to operational heat is substantially negated due to compensation by said means automatically sensing and compensating for thermal deformation.

Claim 15

The apparatus as set forth in claim 9 in which said pillars include a fluid therein and heat transmitters operatively connected to said spindle head and said pillars, said heating means being operatively connected to said fluid and a thermal compensating circuit whereby thermal deformations at the spindle are substantially negative when the apparatus is in operation.

Claim 16

The apparatus as claimed in claim 7 including power means mounted on the upper surface of said frame in opposition to said spindle head whereby thermal expansion caused by heat generated by operation of said spindle and said power means substantially cancel each other out.