CN2110534U

CN2110534U - Special hole boring machine

Info

Publication number: CN2110534U
Application number: CN 91231560
Authority: CN
Inventors: 王宝沛; 谢汝华; 翟鹏; 王海华
Original assignee: SHANDONG PISTON FACTORY
Current assignee: SHANDONG PISTON FACTORY
Priority date: 1991-12-04
Filing date: 1991-12-04
Publication date: 1992-07-22

Abstract

The utility model provides the special equipment for the finish machining to special holes, such as special pin holes of pistons, etc.). The utility model mainly comprises a lathe bed 23, a motor, a spindle box 24, a positioning mechanism 22, an axial feed mechanism, a radial feed mechanism 25, a tool bar 17 and a microcomputer 21. The utility model has the advantages of high machining precision, simple structure, convenient operation, high automatization and strong reliability.

Description

Special hole boring machine

The utility model provides the special equipment of a kind of fine finishining irregularly-shaped hole (as piston pinhole, i.e. high load capacity ess-strain type curved surface pin-and-hole etc.).

At present, the domestic special equipment that does not still have the fine finishining irregularly-shaped hole.Once developed a kind of irregularly-shaped hole process equipment that utilizes the hydroelastic system deformation principle abroad, but mechanism's complexity, resolving accuracy low (only being 0.10 μ m/ pulse), the required precision that does not reach high accuracy piston irregularly-shaped hole.

The purpose of this utility model provides a kind of special equipment of fine finishining irregularly-shaped hole, to satisfy the required precision of high accuracy piston pinhole.

The utility model is to realize like this, this boring machine is mainly by lathe bed, motor, main spindle box, detent mechanism, axial feed mechanism, radially delivering gear and microcomputer are formed, in the radially delivering gear wherein, the knife bar center line departs from spindle centerline, and by the spiral fluted effect, the rectilinear motion of slide unit changes into and rotatablely moves, realized that off-centre rotatablely moves, thereby make knife bar in high speed rotary, spindle centerline rotatablely moves as off-centre relatively again, realizes the radially feed of cutter.Its axial feed motion is moved by micro-processor controlled stepper motor drive slide unit and realizes two kinds of motion interlocks.

Adopt the radially irregularly-shaped hole process equipment of delivering gear of above-mentioned microcomputer control centering type, machining accuracy height (resolving accuracy is 0.03 μ m pulse), simple in structure, easy to adjust, processing ease, good reliability.

Describe the concrete structure of the present utility model and the course of work in detail below in conjunction with drawings and Examples.

Fig. 1 is an integral installation figure of the present utility model.Fig. 2, Fig. 3 have represented in the utility model the radially schematic diagram of delivering gear.

As can be seen from Figure 1, the utility model is mainly by the motor in lathe bed 23, the left base, main spindle box 24, radially delivering gear 25, knife bar 17, positioner 22, axial feed mechanism and microcomputer 21 etc. are formed.

As shown in the figure, in radially delivering gear of the present utility model, ring flange 3 and main shaft 2 match by the conical surface, under the effect of two nuts 26 in main shaft 2 rear ends, ring flange 3 leans against on the main shaft 2 tightly, and band spiral fluted support 4 is screwed together with ring flange 3.Support 4 has identical helical groove structure with cover 8, double spiral groove seamlessly is clipped in four rollers 13 wherein, cover 8 is fixed together by screw and support 4, the supporting member of four rollers i.e. axle 7 and splined shaft 10 connects together by interference fit, since spline housing 9,11 with overlap 12 and link to each other by screw, therefore, cover 12 links to each other with interior axle 1 by the dovetail structure of being made up of dovetail 5 and dovetail groove 6.So, the dovetail structure that the rotation of support 4 is just formed by four rollers 13, axle 7, splined shaft 10, two spline housing 9,11, cover 12, dovetail 5 and dovetail groove 6 has passed on the interior axle 1.Its transmission process can followingly be represented.

Main shaft 2

Ring flange 3

Support 4

Roller 13

Axle 7

Splined shaft 10

Two spline housings 9,11 Cover 12

The dovetail structure that dovetail 5 and dovetail groove 6 are formed

Interior axle 1(knife bar 17).

Main shaft 2 is eccentric shafts and makes high speed rotary motion, for the centrifugal force that reduces to be caused as far as possible owing to eccentric, the interior axle 1 that connects together with knife bar 17 is also made eccentric, and offset is identical with main shaft 2, under original state (when need not radially feed), main shaft 2 fits together by the opposite direction of eccentric direction with interior 1, and can reduce does not greatly like this have the centrifugal force that increases cutter (radially feed) situation lower main axis.

Fig. 2, Fig. 3 have represented interior axle 1(knife bar 17) be how in the radially feed of when main shaft 2 is made high speed rotating, doing again with respect to main shaft 2 that relatively rotates promptly.

In Fig. 3, ball-screw nut 15 and slide unit 14 are fixed together by screw, are subjected to the servo step motor 16 of microcomputer 21 controls to drive slide units 14 moving linearlies by ball-screw nut 15, and splined shaft 10 is housed on the slide unit 14.Because 7 and four rollers 13 of axle connect together, and four rollers 13 seamlessly lean against in the double spiral groove on support 4 and the cover 8, so the rectilinear motion of splined shaft 10 has just become splined shaft 10 rotation when the rectilinear motion by the double spiral groove structure, and splined shaft 10 is honeysuckle key nested structure, cover 12, the dovetail structure 5,6 of this rotation by spline housing 9,11 compositions, finally pass on the interior axle 1, formed interior axle 1 and rotated the i.e. radially feed campaign of knife bar 17 relative to main shaft 2.

This formation in relative rotation is as follows with transmittance process:

Stepper motor 16

Slide unit 14

Double spiral groove 4,8

Roller 13

Axle 7 Splined shaft 10 Two spline housings 9,11

Cover 12

Dovetail structure 5,6

Interior axle 1.

Because the existence of interior eccentric shaft, when interior axle 1 relative main shaft 2 relatively rotates, axle 1 relative main shaft 2 moves radially relatively in certainly leading to, and overlap 12 with main shaft 2 be coaxial, so interior axle 1 with overlap 12 transmission link on relative moving radially just arranged, in order to eliminate this moving radially, on the driving-chain of interior axle 1 and cover 12, increased the dovetail structure of forming by dovetail 5 and dovetail groove 6 again, the dovetail direction that can relatively move is consistent with interior eccentric shaft direction.

When processing profiled hole, adopted the microcomputer control mode, thereby realized that cutter is vertically having the radial feed motion in (machining hole is axial) feed motion, axial feed and radial feed interlock.Microcomputer 21 control step motors 20 drive slide unit 18 moving linearlies to realize the length feed motion of boring machine.

In order to ensure the repeatable accuracy of feed radially, satisfy the radially linear characteristic requirement of feed, on corresponding transmission link, all disposing the Portuguese bowline structure.As eliminating rectilinear motion is changed into rotatablely move error on the link of knife bar with double-spiral structure; Eliminate knife bar with honeysuckle key nested structure and rotate error on the transmission link etc.

In order to improve the irregularly-shaped hole machining accuracy, the guide rail on the lathe bed 19 has adopted static pressure " two V " guide rail with high shock resistance and high rigidity.Front and back bearings of main shaft has adopted the orifice restriction hydrostatic bearing to improve the rotating accuracy of main shaft 2.

The machining accuracy of the utility model boring machine for boring special-shaped holes is as follows:

1, surface roughness Ra 0.40

2, irregularly-shaped hole form accuracy＜0.002mm

3, resolving accuracy 0.03 μ m/ pulse

Claims

Boring machine for boring special-shaped holes, mainly by lathe bed 23, motor, main spindle box 24, detent mechanism 22, axial feed mechanism, radially delivering gear 25, knife bar 17 and microcomputer 21 are formed, it is characterized in that, in described radially delivering gear, ring flange 3 and main shaft 2 are under the effect of two nuts 26 in main shaft 2 rear ends, be close together tightly by the conical surface, band spiral fluted support 4 and ring flange 3 are fixed together by screw, cover 8 has identical helical groove structure with support 4, both are fixed together by screw, four rollers 13 seamlessly are clipped in the double spiral groove, the supporting member of four rollers i.e. axle 7 and splined shaft 10 connects together by interference fit, two spline housings 9,11 link to each other by screw with cover 12, cover 12 links to each other with interior axle 1 by the dovetail structure of being made up of dovetail 5 and dovetail groove 6, in axle 1 center line be the center line that the center line of knife bar 17 departs from main shaft 2, the ball-screw nut 15 that servo step motor 16 drives and slide unit 14 are fixed together by screw, and splined shaft 10 is housed on the slide unit 14.