CN101306506B

CN101306506B - Barrel-type roller grinding device

Info

Publication number: CN101306506B
Application number: CN2007100561326A
Authority: CN
Inventors: 吴庆堂; 聂凤明; 王大森; 胡宝共; 刘劲松; 闫晓丽; 张维杰; 卢政宇
Original assignee: Changchun Inst Of Apparatus & Technique
Current assignee: Changchun Inst Of Apparatus & Technique
Priority date: 2007-10-10
Filing date: 2007-10-10
Publication date: 2010-10-06
Anticipated expiration: 2027-10-10
Also published as: CN101306506A

Abstract

A grinding device for processing a drum-shaped roller belongs to the machining technology field. The invention is characterized in that a precision platform is taken as the bed; a hydrodynamic-hydrostatic grinding wheel system, a precision work-arbor system, a Y-axis precision rectilinear motion platform and a Z-axis precision turntable are arranged on the bed; in the turning and the rectilinear motions, the double-shaft numerical-control linkage is adopted, and the machining track can be controlled via changing the linear feed amount and the angular displacement. The grinding device has the advantages of solving the technical difficulties in machining the drum-shaped roller, ensuring the machining precision and the working efficiency of the drum-shaped roller, satisfying the developing requirement of increasing the oil-supply pressure in a novel engine, having definite significance for improving the design level and the manufacture level of a vehicle dynamical system.

Description

Barrel-type roller grinding device

Technical field:

The invention belongs to the Machining Technology field.

Background technology

Along with improving constantly of the charge oil pressure of Diesel engine, higher to quality, the requirement of strength of the parts of oil supply system.In configuration aspects, the roller profile is designed to the high drum organization of bearing capacity, has prevented the appearance of the edge conquassation phenomenon of cylinder roller, improves roller ground intensity, has prolonged engine ground service life.Barrel-type roller side bus radius of curvature requires to reach more than the 1.4m, is that to require overhang on the face of cylinder of 4mm be 0.016～0.002mm at width, and the accuracy of form and position requires high, shown in Fig. 1 roller manuscript, has increased the difficulty of processing of roller.

Usually the processing barrel-type roller adopts two kinds of methods: a kind of: form grinding processing, crushing one-tenth and the akin shape of cydariform are carried out grinding, but because trim amount is little, dressing accuracy is difficult to control, so the roller size precision of processing is difficult to guarantee, because the plunge grinding area is big, roughness, precision are difficult to reach the specification requirement of barrel-type roller simultaneously; Second kind: polishing processing, working (machining) efficiency is low, and the bad assurance of the uniformity of polishing is big for the performance impact of one group of roller.In order to last method processing, if the structural change of barrel-type roller, emery wheel and polishing instrument also will change, and are difficult to adapt to many kinds, the change batch production requirements of barrel-type roller.

Summary of the invention

The objective of the invention is:

The equipment for grinding of a kind of high accuracy, high efficiency, the processing of many kinds of adaptation barrel-type roller is provided.

The present invention derives as follows according to processing request and Mathematical Modeling principle:

High-pressure pump barrel-type roller cydariform protrusion amount 0.02 _-0.004 ⁰Mm.Because the roller arc diameter is big, can not rotate around center of arc point, in the actual processing, adopt ideal point, promptly can realize the radius point of rotating, roller centers on ideal point and rotates, and roller becomes eccentric cam like this.Roller is in rotation process, and circumference is tangent with emery wheel all the time, and just the point of contact is changing, if emery wheel is motionless, then roller is done forward and backward reciprocating motion when rotating, and guarantees that the cydariform cylindrical of roller is tangent with the emery wheel side bus all the time.This principle is applied to the grinding of roller, then can realize orthodrome grinding on the minor radius turntable, as roller movement locus simulation schematic diagram.

The numerical control linked curvilinear equation of angle displacement and straight-line displacement:

Shown in roller processing schematic diagram, O ' is the central point of roller circular arc, and O is the center of rotation of real work platform, and it is motionless that grinding carriage keeps, and roller rotates and rectilinear motion.Shown in Figure 2 as roller processing signal, roller rotates the θ angle, and the central point O ' of roller circular arc moves to O ' 1 point, and displacement is Δ on the Y direction, and the circular arc peak also is the Δ distance at the amount of movement of Y-axis; Shown in Figure 3 as roller processing signal, with the roller mobile Δ distance on Y direction after rotating, remain the linear position of a work O ' relative emery wheel, then the roller circular arc is still tangent with the bus of emery wheel.

In the grinding process, the grinding points of emery wheel changes, and grinding points moves, and displacement is L, and with respect to overall structure, emery wheel helps grinding doing lengthwise movement, reduces the wear extent of emery wheel, keeps the emery wheel precision.

Shown in roller movement locus simulation schematic diagram:

Setting parameter is: the radius of gyration is r, and the roller radius is R, and its eccentric throw is e=R-r

If its corner is the θ angle, the increment at its θ angle is Δ θ

Δ＝R-L ₁

Δ ₂＝R-L ₁

Δ＝Δ ₂

The amount of movement L2 that is the summit is moving radially distance L for its circular arc center of circle

e ₁＝e?cosθ

Δ＝e-e ₁

Δ＝e-ecosθ＝e(1-cosθ)

That is: Δ=e (1-cos θ) (the numerical control linked programming curvilinear equation of angle displacement and diaxon straight-line displacement)

In the grinding process, the grinding points of emery wheel changes, and grinding points moves, and displacement is L, and with respect to overall structure, emery wheel helps grinding doing lengthwise movement, reduces the wear extent of emery wheel, keeps the emery wheel precision.At roller edge circular arc radius R 1400～2900mm, on a precision grinder, carry out technological experiment, Y-axis adopts the Precision Linear Moving platform, the Z axle adopts the precision rotating platform, in rotation and rectilinear motion, adopt the two-axis numerical control interlock, by changing straight-line feed amount and variation in angular displacement, the control machining locus guarantees machining accuracy.

Technical scheme of the present invention is:

With the precision surface plate is lathe bed, dynamic and static pressure emery wheel system is housed on lathe bed, the precision workpiece axle system, Y-axis Precision Linear Moving platform, Z axle precision rotating platform, workpiece adopt the two-axis numerical control interlock in rotation and rectilinear motion, by changing straight-line feed amount and variation in angular displacement, the control machining locus.

Concrete technical scheme is:

In dynamic and static pressure emery wheel system, grinding wheel spindle is the dynamic and static pressure grinding wheel bearing; The precision workpiece axle system is a high accuracy duplex main shaft bearing; Z axle precision rotating platform is the anti-backlash worm wheel structure, and worm gear adopts two chip architectures, connects by spring; The Precision Linear Moving parts are high-precision leading screw, guide rail, and the crack transmission mechanism links together by disappearing.

The invention has the beneficial effects as follows:

Can be by Y, the interlock of Z two number of axle and GL software function according to designing the roller cylindrical that needs carry out manufacturing complex shapes, the overhang minimum can reach 0.004 ± 0.001mm, and roughness reaches 0.2um, and circularity reaches 0.002mm.

Solved the process technology difficult problem of barrel-type roller, guaranteed the machining accuracy and the production efficiency of barrel-type roller, satisfied the development requirement that new work engine improves charge oil pressure, design and the manufacture level that improves automotive power had certain meaning.

Description of drawings

Fig. 1 roller movement locus simulation schematic diagram

Fig. 2 is a roller interlock processing schematic diagram;

Fig. 3 is an overall construction drawing of the present invention;

Fig. 4 is that K-K is to structure chart;

Fig. 5 is that A-A is to structure chart;

Fig. 6 is that B-B is to structure chart;

Fig. 7 is that B-B is to the structure side cutaway view.

The specific embodiment

Embodiment 1:

The present invention includes with lower member: lathe bed, grinding wheel spindle system, workpiece spindle system, precise rotating platform parts, Precision Linear Moving parts, cooling, lubricating system, control system etc.

Shown in Fig. 3,4, the 1st, lathe bed, the 2nd, grinding wheel spindle system, the 3rd, workpiece spindle system, the 4th, precise rotating platform parts, the 5th, Precision Linear Moving parts, the 6th, reducing motor, the 7th, accurate reducing gear, the 8th, servomotor, the 9th, correcting plate.

As shown in Figure 5, the 31st, bearing block, the 32nd, axle, the 33rd, polywedge bet wheel, the 34th, duplex bearing, the 35th, ring flange, the 36th, workpiece, the 37th, collet, the 38th is adjusted piece, the 39th, base.

Shown in Fig. 6,7, the 41st, spring, the 42nd, base wheel, the 43rd, moving runner.

Lathe bed adopts cast iron quality, through weathering processing, can guarantee the overall precision of lathe, and is stable, reliable, indeformable.

In the grinding wheel spindle system, grinding wheel spindle adopts the dynamic and static pressure grinding wheel bearing, after the main axis rotation, has produced very high oil film pressure between main shaft and the bearing during work, guarantees the rigidity requirement of grinding wheel spindle; The gap is little between main shaft and the bearing, the precision height.

The workpiece spindle system adopts high accuracy duplex main shaft bearing, produces pressure when guaranteeing screw-driving by the gap of adjusting blind flange when assembling, has both guaranteed the gap of duplex bearing, has improved the precision of beating of workpiece spindle, guarantees the cylindrical precision of workpiece.

The precise rotating platform parts adopt the anti-backlash worm wheel structure, and worm gear adopts two chip architectures, connect by spring, and during the positive and negative motion of worm gear, worm gear contacts with worm screw all the time, has reached the zero clearance transmission, has eliminated the error of turntable, has guaranteed the workpiece rotation precision.

The Precision Linear Moving parts adopt high-precision leading screw, guide rail, link together by the crack transmission mechanism that disappears, and the crack transmission mechanism that disappears makes feed screw nut and workbench seamless connectivity, and the driving error of elimination has guaranteed the precision of transmission.

Control system adopts the SIMENS system, by changing transmission control parameter, improves the resolution ratio of system, has realized micro-control, has improved the precision of equipment.

By Precision Linear Moving, precise rotating platform motion and accurate control system have realized high accuracy, the processing of high efficiency barrel-type roller.

Process is as follows:

(1) Y-axis microfeed grinding roller cylindrical guarantees that cylindrical required precision: 0.004mm guarantees the axiality φ 0.012mm of cylindrical endoporus.

(2) adjust the distance that the Y-axis axial location guarantees emery wheel and roller, choose the work of NC program start according to the difformity cydariform.

(3) numerical control table, NC table work Y-axis feeding, the Z axle rotates, two NC program interlocks that generate automatically according to GL software.

(4) machine according to NC program roller after, Y-axis, the Z axle is return the home position.

(5) operation is finished and is entered next working cycles.

Claims

1. barrel-type roller grinding device, it is characterized in that: be lathe bed with the precision surface plate, dynamic and static pressure emery wheel system is housed on lathe bed, the precision workpiece axle system, Y-axis Precision Linear Moving platform, Z axle precision rotating platform, workpiece is in rotation of Z axle and Y-axis rectilinear motion, the interlock of employing two-axis numerical control is by changing straight-line feed amount and variation in angular displacement, the control machining locus;

In dynamic and static pressure emery wheel system, grinding wheel spindle adopts the dynamic and static pressure grinding wheel bearing; The precision workpiece axle system adopts high accuracy duplex main shaft bearing; The precise rotating platform parts of Z axle precision rotating platform are the anti-backlash worm wheel structure, and worm gear adopts two chip architectures, connects by spring; The Precision Linear Moving parts of Y-axis Precision Linear Moving platform are high-precision leading screw, guide rail, and the crack transmission mechanism links together by disappearing.