CN102825297B - Taper hole boring device for numerical control boring mill - Google Patents

Abstract

The invention provides a taper hole boring device for a numerical control boring mill and belongs to the field of metal machining apparatuses. The numerical control boring mill comprises a mill body which comprises a workpiece platform and a plurality of upright posts; the taper hole boring device comprises a boring head lifting base, a main shaft rotation driving mechanism, a spline shaft lifting mechanism, a main shaft, a spline shaft, and a boring cutter bar lifting and eccentric moving mechanism; the main shaft rotation driving mechanism is arranged on one side of the boring head lifting base; the spline shaft lifting mechanism is arranged on the other side of the boring head lifting base; the main shaft is provided with a spline shaft pullback through hole, the upper end of the main shaft is connected with the main shaft rotation driving mechanism and the lower end is provided with a main shaft connecting plate in an expanding manner; the upper end of the spline shaft is connected with the spline shaft lifting mechanism and the lower end is provided with a spline shaft connecting plate; the boring cutter bar lifting and eccentric moving mechanism is connected with the main shaft connecting plate and the spline shaft connecting plate; the spline shaft lifting mechanism comprises a bracket, a screw rod driving motor, a screw rod, a screw nut and a screw nut base. The taper hole boring device has the following advantages that the boring effect and the boring efficiency of taper holes can be obtained, the whole boring device is small in volume, and convenient to install, use and maintain; the stable movement effects of the main shaft and the spline shaft are ensured, therefore, the boring device has excellent lifting effect.

Description

Numerical control borer bellmouth boring device

Technical field

the invention belongs to metal-working plant technical field, be specifically related to a kind of numerical control borer bellmouth boring device.

Background technology

what utilize that drilling machine is drilled with non-reducing to workpiece is that isodiametric through hole or blind hole do not exist technology barrier substantially, but for example workpiece of building riveting beam and so on of workpiece is drilled with and connects to the other end from one end of workpiece or claim in the time that a side of workpiece is through to the deep taper hole of opposite side, to expose following technical problem: the one, because needs are frequently changed the drill bit of different-diameter, thereby efficiency is low and workman's manipulation strength is large; The 2nd, due to the cause of the frequent drill bit of changing different-diameter, thereby leave over step at the hole wall of taper hole, and in order to eliminate step, need to scrape by reamer strand, thereby made boring procedure more tediously long.

utilize boring machine boring deep taper hole on workpiece for drilling machine, to there is obvious advantage, be no lack of about the technical information for to workpiece boring taper hole in published Chinese patent literature, slightly taking exemplify and for typical as: " deep taper hole boring machine " of Granted publication CN2152623Y recommendation, although this patent scheme can embody 6 strong points that its Instructions Page 2 is concluded, but objectively there is following shortcoming: the one, owing to having adopted horizontally-arranged formula structure, therefore except being equipped with between two, needs also need configuration front and back centralizer etc. opposed carrying roller, it is complicated that thereby the structure of making and operating process become, the 2nd, drive and send girff because motion mode shows as by the boring bar being connected with the main shaft of the shaft transmission of boring machine, again by sending girff to drive the leading screw in the axial dovetail groove that is contained in boring bar, and then drive boring cutter by leading screw, therefore the outfit effect drive connection relative complex, and leading screw and tediously long boring bar (needing entirety through workpiece) is difficult to guarantee, the 3rd, because boring bar and boring cutter are not made eccentric motion, therefore can only be to the taper hole entirety scraping of workpiece, resistance is large, once and boring cutter cause damage change trouble and cost large, the 4th, because boring cutter does not have motion incremental or that gradually move back in proper order with respect to workpiece, therefore cause the increase of output power of the boring machine that orders about boring bar motion.Substantially there is the shortcoming of CN2152623Y in " taper hole boring lathe " that Granted publication CN2902535Y provides, and overall structure is more complicated, especially patent scheme do not made to clear complete explanation.

in addition, as bellmouth boring device, except main shaft, also should have coordinate with main shaft and by the splined shaft of main shaft driven rotary, and splined shaft should follow main shaft rotation to need self to move up and down, if therefore will make splined shaft move up and down, must the rational splined shaft elevating mechanism of project organization.But these technical information all do not obtain even micro-vast enlightenment in disclosed document.

in view of above-mentioned prior art, the applicant has done positive and useful design, and taking to have carried out simulated test in the applicant plant area under strict secrecy provision, it is practicable that result proves, and technical scheme described below produces under this background.

Summary of the invention

task of the present invention is to provide a kind of and contributes to make boring bar to have both lifting and eccentric motion and use the boring effect of promoting taper hole, be conducive to become being horizontally placed to longitudinal setting and using and save space hold to boring machine and significantly dwindle overall volume in prior art, be of value to embodiment independence and use easy to use and safeguard, there is the steady effect of being convenient to guarantee good drive connection and use while embodying motion to be good at guaranteeing that with having splined shaft has the numerical control borer bellmouth boring device of good lifting effect in following main shaft rotation.

task of the present invention completes like this, a kind of numerical control borer bellmouth boring device, described numerical control borer includes a body, this body has a work piece platform and a column, described bellmouth boring device comprises a boring head elevating bracket, this boring head elevating bracket is connected with described column up-down under use state, and this boring head elevating bracket is corresponding to the top of described work piece platform, one main shaft rotary drive mechanism, this main shaft rotary drive mechanism is arranged on a side at the top of described boring head elevating bracket, one splined shaft elevating mechanism, this splined shaft elevating mechanism is arranged on the opposite side at the top of boring head elevating bracket, and corresponding with main shaft rotary drive mechanism, with longitudinal state be bearing in rotationally on described boring head elevating bracket and form a main shaft that has a splined shaft resigning hole from one end to the other side in the central authorities of short transverse, it is corresponding with described splined shaft elevating mechanism that the upper end of this main shaft leans out the top of boring head elevating bracket, and be in transmission connection with described main shaft rotary drive mechanism, and leaning out bottom and the expansion of boring head elevating bracket, the lower end of main shaft is provided with a spindle coupling disc, be arranged on up or down the splined shaft in described splined shaft resigning hole, the upper end of this splined shaft leans out splined shaft resigning hole and is connected with described splined shaft elevating mechanism, and the described upper end of this splined shaft also coordinate with the inwall key of splined shaft resigning hole and use by described main shaft drive its rotation, the lower end of splined shaft leans out splined shaft resigning hole equally and formation has a splined shaft terminal pad, one boring cutter bar lifting and eccentric moving mechanism, this boring cutter bar lifting is connected with described spindle coupling disc with eccentric moving mechanism, and be connected with described splined shaft terminal pad, wherein, form and have a leading screw resigning hole in the axial central authorities of the described upper end of described splined shaft, described splined shaft elevating mechanism comprises support, leading screw drive motors, leading screw, feed screw nut and feed screw nut seat, support is fixed on the top of described boring head elevating bracket, this has been configured to a support chamber, and on the outer wall of a side of this support, offer the feed screw nut seat opening of stepping down, both sides in the short transverse of the opening of stepping down corresponding to this feed screw nut seat are respectively fixed with a feed screw nut seat guide rail with longitudinal state, the shape of cross section of feed screw nut seat guide rail is swallow-tail form, leading screw drive motors is fixed on leading screw drive motors seat, leading screw drive motors seat is fixed on the top of described support, the upper end of leading screw is bearing on support rotationally, and be connected with the leading screw drive motors through-drive of leading screw drive motors by coupling band, the lower end of leading screw is stretched in described leading screw resigning hole, feed screw nut is disposed on leading screw with thread fiting mode, and be fixedly connected with feed screw nut seat, and feed screw nut seat leans out the described feed screw nut seat opening of stepping down, and be slidably matched with described a pair of feed screw nut seat guide rail, match with described feed screw nut seat by splined shaft pivotable supporting device in the described upper end of described splined shaft, on the outer wall of the upper end of splined shaft, form and have one group of spline that is projected on the outer wall surface of splined shaft with interval state, on the hole wall of the splined shaft resigning hole of described main shaft and offering the spline that quantity equates with the quantity of spline corresponding to the position of spline, spline matches with spline, the degree of depth of described leading screw resigning hole is that the stroke moving up and down with described leading screw adapts.

in a specific embodiment of the present invention, described main shaft rotary drive mechanism comprises spindle drive motor, initiative driver, driven drive and driving-belt, spindle drive motor is fixed on spindle drive motor seat, and spindle drive motor seat is fixed on the top of described boring head elevating bracket, the spindle drive motor axle of spindle drive motor probes in the drive motors seat chamber of spindle drive motor seat, initiative driver is fixed on spindle drive motor axle, driven drive is fixed on the described upper end of described main shaft, one end of driving-belt is nested with on initiative driver, the other end is nested with on driven drive.

in another specific embodiment of the present invention, described initiative driver and driven drive are belt pulley or synchronous pulley, and described driving-belt is driving belt or Timing Belt.

in another specific embodiment of the present invention, on described feed screw nut seat and be fixed with a pair of feed screw nut seat guide pad corresponding to the position of described a pair of feed screw nut seat guide rail, this a pair of feed screw nut seat guide pad forms and has shape of cross section to be the guide pad sliding tray of swallow-tail form towards a side of described feed screw nut seat guide rail, guide pad sliding tray and feed screw nut seat guide rail are slidably matched, and offer the stepped hole of a up/down perforation corresponding to the position of described leading screw at feed screw nut seat, described feed screw nut is fixedly connected with feed screw nut seat on the top corresponding to stepped hole, and described splined shaft pivotable supporting device is positioned at the bottom of stepped hole, this splined shaft pivotable supporting device comprises splined shaft rotating support bearing, bearing gland and bearing cover, splined shaft rotating support bearing holder (housing, cover) is put the described upper end at described splined shaft, and be positioned at the bottom of described stepped hole, bearing gland is arranged in stepped hole, and corresponding to the top of splined shaft rotating support bearing, this bearing gland is fixedly connected with spline by one group of splined shaft attachment screw or is fixedly connected with the end face of splined shaft, bearing cover is positioned at the below of splined shaft rotating support bearing and the bottom at the bottom corresponding to stepped hole and described feed screw nut seat.

in another specific embodiment of the present invention, on described boring head elevating bracket and below corresponding to described splined shaft elevating mechanism, form a spindle hole that has up/down perforation, the middle part of the length direction of described main shaft is by being nested with the main shaft upper bearing (metal) on main shaft and being bearing in rotationally in spindle hole corresponding to the main shaft lower bearing below main shaft upper bearing (metal), on main shaft and in the position corresponding to described main shaft upper bearing (metal), form and have a shaft shoulder, the downside of main shaft upper bearing (metal) is resisted against on the shaft shoulder, and that the upside of main shaft upper bearing (metal) is disposed in upper locking nut on main shaft by screw thread is spacing, the downside of main shaft lower bearing is by limiting with the fixing bearing cap of boring head elevating bracket, and that the upside of main shaft lower bearing is disposed in lower locking nut on main shaft by screw thread is spacing.

also have in a specific embodiment of the present invention, described boring cutter bar lifting and eccentric moving mechanism comprise flat rotation set, guide-rail plate, facing head slide, facing head translation slide, line rail chair and boring cutter bar holder, flat rotation set and described spindle coupling disc towards under a side fix, on the diapire in the flat rotation set chamber of this flat rotation set and an inclined to one side side offer the line rail chair chamber of stepping down, be provided with a guide-rail plate chamber at the side opening of flat rotation set, guide-rail plate is positioned at flat rotation set chamber, and fix in the position corresponding to described guide-rail plate chamber and described flat rotation set, form and have a pair of longitudinal parallel guide rail each other towards a side of facing head slide at guide-rail plate, facing head slide and described splined shaft terminal pad towards under a side be fixedly connected with, at this facing head slide towards a side of described guide-rail plate and be fixed with guide block in the position corresponding to described pair of guide rails, guide block and guide rail are slidably matched, and facing head slide is configured to the facing head slide inclined plane tilting from top to bottom back to a side of described guide-rail plate, and be fixed with a slide guide block on this facing head slide inclined plane, facing head translation slide coordinates with the basal sliding of described flat rotation set, line rail chair is fixed on facing head translation slide towards a upper side, and be positioned at one end of facing head translation slide, this line rail chair is insinuated in described flat rotation set chamber in the position in the chamber of stepping down corresponding to described line rail chair, and match with described diapire, wherein: line rail chair is configured to the line rail chair inclined plane tilting from bottom to top towards a side on described facing head slide inclined plane, be fixed with a line rail chair guide rail in the short transverse on this line rail chair inclined plane, this line rail chair guide rail and described slide guide block are slidably matched, boring cutter bar holder be fixed on described facing head translation slide towards under a side.

more of the present invention and in a specific embodiment, be fixed with parallel a pair of facing head translation carriage rail in the bottom of described flat rotation set, and described facing head translation slide towards on a side and be fixed with guide block corresponding to the position of facing head translation carriage rail, guide block and facing head translation carriage rail are slidably matched.

in of the present invention and then a specific embodiment, in the bottom of the short transverse of described line rail chair and offer the breach of stepping down in the position of the diapire corresponding to described, this breach of stepping down matches with diapire.

of the present invention again more and in a specific embodiment, be fixed with boring head elevating bracket movable block at described boring head elevating bracket towards a side of the column of described bed body, this boring head elevating bracket movable block matches with the boring head elevating bracket reciprocating mechanism being arranged on column.

technical scheme provided by the invention can ensure lifting and eccentric motion by the boring cutter bar lifting being connected with the spindle coupling disc of main shaft and be connected with the splined shaft terminal pad of splined shaft and eccentric moving mechanism simultaneously, thereby can obtain boring effect and the boring efficiency to taper hole; Because main shaft and splined shaft are longitudinal setting, thereby can reduce the space hold on boring machine, and overall volume is significantly dwindled; Because whole bellmouth boring device is configured to an independently mechanism, therefore both contributed to install and use, be conducive to again maintaining; Because main shaft rotary drive mechanism and splined shaft elevating mechanism can well connect with main shaft and splined shaft respectively, thereby the steady effect of the motion that can ensure main shaft and splined shaft, and ensure that by splined shaft elevating mechanism splined shaft has good lifting effect in following main shaft rotation.

Brief description of the drawings

fig. 1 is embodiments of the invention structure chart.

fig. 2 is the cutaway view of Fig. 1.

fig. 3 is the assembling schematic diagram of the boring cutter bar lifting shown in Fig. 1 and eccentric moving mechanism.

fig. 4 is application examples schematic diagram of the present invention.

Detailed description of the invention

for the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, applicant elaborates the mode with embodiment below, but be not all the restriction to the present invention program to the description of embodiment, any done according to the present invention design only for pro forma but not substantial equivalent transformation all should be considered as technical scheme category of the present invention.

refer to Fig. 1 and Fig. 2, show a boring head elevating bracket 2, be fixed with a boring head elevating bracket movable block 22 at boring head elevating bracket 2 towards a side of the column 12 of the bed body 1 of the boring machine that also will describe in detail and illustrated by Fig. 4 below, and form and have a spindle hole 21 on boring head elevating bracket 2.

the main shaft rotary drive mechanism 3 illustrating preferably but not the structure being definitely limited to is as follows: comprise spindle drive motor 31, initiative driver 32, driven drive 33 and driving-belt 34, spindle drive motor 31 is fixed on spindle drive motor seat 312 in back-off mode, the spindle drive motor axle 311 that the concept of the back-off said here refers to spindle drive motor 31 towards under, and this spindle drive motor axle 311 is stretched in the drive motors seat chamber 3121 of spindle drive motor seat 312, spindle drive motor seat 312 use drive motors seat hold-down screws 3122 are fixed on the top of aforesaid boring head elevating bracket 2, be fixed on the top surface of boring head elevating bracket 2, initiative driver 32 preferably uses flat key and spindle drive motor axle 311 to fix, and be positioned at aforesaid drive motors seat chamber 3121, driven drive 33 is fixed on the main shaft 5 that also will describe below, one end of driving-belt 34 is nested with on initiative driver 32, and the other end is nested with on driven drive 33.

aforesaid driving and driven drive 32,33 is belt pulley or synchronous pulley, and aforesaid driving-belt 34 is driving belt or Timing Belt.Particularly, in the time that driving and driven drive 32,33 is belt pulley, driving-belt is driving belt; And in the time that driving and driven drive 32,33 is synchronous pulley, driving-belt 34 is Timing Belt, the present embodiment is selected the latter.

when the spindle drive motor 31(spindle drive motor 31 of the electric control box that is controlled by numerical control borer is connected with electric control box electrical control) when work, drive initiative driver 32 by spindle drive motor axle 311, drive driven drive 33 through driving-belt 34, because driven drive 33 is fixed on main shaft 5, therefore drive main shaft 5 to rotate by driven drive 33.

the splined shaft elevating mechanism 4 illustrating is arranged on the top of boring head elevating bracket 2, be arranged on the top surface of boring head elevating bracket 2, and corresponding with aforesaid main shaft rotary drive mechanism 3, more particularly, corresponding with the spindle drive motor 31 of main shaft rotary drive mechanism 3.That is to say, main shaft rotary drive mechanism 3 is positioned at the right side of shown position state in the position at boring head elevating bracket 2 tops, and splined shaft elevating mechanism 4 is positioned at left side (taking the location status of current icon as example).

aforesaid main shaft 5 is bearing on boring head elevating bracket 2 rotationally with longitudinal state, is more particularly bearing in rotationally in aforesaid spindle hole 21.Shown in figure, the top that the upper end of main shaft 5 leans out boring head elevating bracket 2 leans out spindle hole 21 and corresponding with the below of splined shaft elevating mechanism 4, the bottom that the lower end of main shaft 5 leans out boring head elevating bracket 2 leans out spindle hole 21, and form the spindle coupling disc 52 just as flange plate-like that has a diameter to be significantly greater than the diameter of main shaft 5, there is the splined shaft resigning hole 51 connecting from one end of main shaft 5 to the other end in the central authorities of the short transverse of main shaft 5 i.e. axial central authorities formation.The middle part of the length direction of main shaft 5 by the middle part of the short transverse under shown position state by being nested with the inner ring of a pair of main shaft upper bearing (metal) 53 of main shaft upper bearing (metal) 53(on main shaft 5) and the inner ring of a pair of main shaft lower bearing 54 of main shaft lower bearing 54() be bearing in rotationally in aforesaid spindle hole 21, on main shaft 5 and in the position corresponding to main shaft upper bearing (metal) 53, form and have the shaft shoulder 55, the downside of main shaft upper bearing (metal) 53 is resisted against on the shaft shoulder 55, and the upside of main shaft upper bearing (metal) 53 is limited by the locking nut 56 screwing with thread fiting mode on main shaft 5, thereby by the shaft shoulder 55 and upper locking nut 56, main shaft upper bearing (metal) 53 is limited.Main shaft lower bearing 54 is corresponding to the below of main shaft upper bearing (metal) 53, the downside of this main shaft lower bearing 54 is limited by bearing cap 541, and bearing cap 541 is fixed in the bottom of the bottom corresponding to spindle hole 21 and boring head elevating bracket 2 by bearing cap hold-down screw 5411, the upside of main shaft lower bearing 54 is limited by the lower locking nut 57 screwing with thread fiting mode on main shaft 5, thereby a pair of main shaft lower bearing 54 is limited between bearing cap 541 and lower locking nut 57.

shown in Fig. 1 and Fig. 2, on the outer wall of the upper end of main shaft 5, form and have a flat key 58, and offer one group of spline 511 with interval state on the hole wall of the aforementioned splined shaft resigning hole 51 of the upper end corresponding to main shaft 5.

the splined shaft 6 illustrating is arranged in aforesaid splined shaft resigning hole 51 up or down, the upper end of this splined shaft 6 is stretched out splined shaft resigning hole 51 and is connected with the splined shaft elevating mechanism 4 of having mentioned above, and the lower end of splined shaft 6 is stretched out splined shaft resigning hole 51 equally and formation has a diameter to be significantly greater than the splined shaft terminal pad 61 just as flange plate-like of the diameter of splined shaft 6.Shown in figure, axial central authorities in the upper end of splined shaft 6 offer a leading screw resigning hole 62, and form and have one group of spline 64 that is projected on the outer surface of splined shaft 6 with interval state at outer wall, the equal and position of the quantity of the quantity of aforesaid spline 511 and spline 64 and spline 64 are corresponding.Realize moving up and down of splined shaft 6 by one group of spline 64 and by the splined shaft pivotable supporting device 63 being connected with splined shaft elevating mechanism 4, and the rotation of splined shaft 6 was realized by aforesaid spline 511 and coordinating of spline 64.As shown in Figure 2, because splined shaft 6 is Step Shaft, particularly have spline 64 position be the diameter of axle that the diameter of axle (diameter of axle) of upper end is greater than lower end, therefore preferably on main shaft 5 and in the position of the bottom corresponding to splined shaft resigning hole 51, be fixed with a splined shaft positioning disk 512 with one group of splined shaft positioning disk screw 5121.

the driven drive 33 of aforesaid main shaft rotary drive mechanism 3 is fixed with flat key 58 keys on the outer wall of the aforesaid upper end that is formed in main shaft 5, for spacing to driven drive 33, so be arranged with a driven pulley platen 65 on splined shaft 6, the screw hole 59 of offering on the upper end end face of this driven pulley platen 65 by platen hold-down screw 651 and main shaft 5 is fixing.

splined shaft elevating mechanism 4 comprises support 41, leading screw drive motors 42, leading screw 43, feed screw nut 44 and feed screw nut seat 45, the bottom of support 41 is fixed with a pack support hold-down screw 413 and the top of boring head elevating bracket 2, and corresponding to the left side (shown position state is example) of aforesaid spindle drive motor seat 312, support 41 forms a support chamber 411, and is fixed with longitudinal state the feed screw nut seat guide rail 412 that a pair of shape of cross section is swallow-tail form on the outer wall of support 41.In order to be stretched over outside support chamber 411 for feed screw nut seat 45 and to be slidably matched with a pair of feed screw nut seat guide rail 412, therefore form in the side of support 41 according to common practise and have the feed screw nut seat opening 414 of stepping down, a wherein rhizoid thick stick nut seat guide rail 412 in aforesaid a pair of feed screw nut seat guide rail 412 is positioned at a step down side of opening 414 of feed screw nut seat, and another rhizoid thick stick nut seat guide rail 412 in a pair of feed screw nut seat guide rail 412 is positioned at the step down opposite side of opening 414 of feed screw nut seat.Leading screw drive motors 42 is fixed on leading screw drive motors seat 422 in back-off mode, the concept of the back-off said here or title connotation are as the description to spindle drive motor 31, this leading screw drive motors 42 is clockwise and anticlockwise motor, and is connected with the electric control box electrical control of numerical control borer.One group of hold-down screw of leading screw drive motors seat 422 use 4221 is fixed (top surface is fixed) with the top of support 41.The upper end of leading screw 43 is bearing on the bearing block 415 defaulting on support 41 rotationally by a pair of leading screw bearing 432, and shows with leading screw drive motors axle 421(Fig. 2 of leading screw drive motors 42 by coupling band 431) be in transmission connection.Aforesaid leading screw bearing 432 limits nut 4321 and limits by be disposed in leading screw bearing on leading screw 43 with thread fiting mode, and is limited by bearing gland 4322, and bearing gland 4322 is fixing with support 41 by bearing gland hold-down screw 43221.The lower end of leading screw 43 is insinuated in aforesaid leading screw resigning hole 62.The middle part threaded engagement of feed screw nut 44 and leading screw 43, and this feed screw nut 44 is fixedly connected with feed screw nut seat 45 by one group of feed screw nut attachment screw 441.As shown in Figure 2, feed screw nut seat 45 has the stepped hole 452 that leads to below from the top of feed screw nut seat 45 of a perforation, aforesaid feed screw nut 44 is positioned at the i.e. top corresponding to stepped hole 452, and above mentioned splined shaft pivotable supporting device 63 is located at the bottom of stepped hole 452.Feed screw nut seat 45 is stretched over feed screw nut seat and steps down outside opening 414 towards a step down side of opening 414 of aforesaid feed screw nut seat, and be fixed with a pair of feed screw nut seat guide pad 451 corresponding to the position of a pair of feed screw nut seat guide rail 412, this a pair of feed screw nut seat guide pad 451 forms and has shape of cross section to be the guide pad sliding tray of swallow-tail form towards a side of feed screw nut seat guide rail 412, and guide pad sliding tray and feed screw nut seat guide rail 412 are slidably matched.The movement travel moving up and down of the degree of depth of aforesaid leading screw resigning hole 62 and aforementioned leading screw 43 adapts, to be stowed in leading screw resigning hole 62 in the time that leading screw 43 is descending.

above mentioned splined shaft pivotable supporting device 63 preferably but not the structure being definitely limited to is as follows: comprise splined shaft rotating support bearing 631, bearing gland 632 and bearing cover 633, splined shaft rotating support bearing 631 is positioned at the described upper end of splined shaft 6, and be positioned at bottom aforesaid and stepped hole 452 that indicated by Fig. 2, bearing gland 632 is arranged in stepped hole 452 and corresponding to the top of splined shaft rotating support bearing 631, on this bearing gland 632 and around the circumferencial direction of bearing gland 632, be equipped with the quantity one group splined shaft attachment screw 6321 corresponding with the quantity position equal and position and spline 64 of aforesaid spline 64 with interval state, splined shaft attachment screw 6321 is fixing with spline 64, but, splined shaft attachment screw 6321 upper end end face preferred and splined shaft 6 is fixed (the present embodiment is like this), bearing gland 633 is corresponding to the below of splined shaft rotating support bearing 631, and the position in the bottom corresponding to stepped hole 452 is fixed with bearing cover hold-down screw 6331 and the bottom of aforesaid feed screw nut seat 45.

when the leading screw drive motors 42(of the splined shaft elevating mechanism 4 that is controlled by numerical control borer has rotating function) when work, just drive by coupling band 431 and rotate with the leading screw 43 that its (its: refer to leading screw drive motors axle 431) is connected by leading screw drive motors axle 421, drive feed screw nut 44 to move on leading screw 43 by leading screw 43, because feed screw nut 44 is fixedly connected with feed screw nut seat 45, therefore with feed screw nut 44 move and that feed screw nut seat 45 is done is corresponding mobile, feed screw nut seat 45 keeps the movement relation of following in sb's footsteps with feed screw nut 44.Because the bearing gland 632 of the splined shaft pivotable supporting device 63 of splined shaft 6 is fixedly connected with splined shaft 6 by splined shaft attachment screw 6321, therefore drive splined shaft 6 to move by feed screw nut seat 45 again.Taking leading screw drive motors 42, work is as example clockwise, and splined shaft 6 is descending, otherwise up.

in the time that aforesaid main shaft 5 rotates, drive the boring cutter bar lifting and the eccentric moving mechanism 7 that are about to describe to rotate below by spindle coupling disc 52, and in the time that splined shaft 6 moves up and down, make boring cutter bar lifting and eccentric moving mechanism 7 make eccentric motion by splined shaft terminal pad 61.

refer to Fig. 3 and continue in conjunction with Fig. 1 and Fig. 2, the structure preferred but not that be limited to of above mentioned boring cutter bar lifting and eccentric moving mechanism 7 is as follows: comprise flat rotation set 71, guide-rail plate 72, facing head slide 73, facing head translation slide 74, line rail chair 75 and boring cutter bar holder 76, the flat rotation set hold-down screw 714 of one group of flat rotation set 71 use and aforesaid spindle coupling disc 52 towards under a side fix, this flat rotation set 71 is cylinder structure, and there is a flat rotation set chamber 711, the line rail chair that on the diapire 7111 in flat rotation set chamber 711 and partially a side of diapire 7111 offers a rectangle (rectangle) chamber 71111 of stepping down.In addition, on the sidewall of flat rotation set 71, offer a guide-rail plate chamber 712, and be that a side outward of aforesaid diapire 7,111 one side of flat rotation set chamber 711 (back to) is fixed with a pair of parallel facing head translation carriage rail 713 in the bottom of flat rotation set 71.Guide-rail plate 72 is positioned at flat rotation set chamber 711, and fixing with flat rotation set 71 with guide-rail plate hold-down screw 722 in the position corresponding to guide-rail plate chamber 712, is fixed with a pair of longitudinal parallel guide rail 721 each other at this guide-rail plate 72 towards a side of facing head slide 73.Facing head slide 73 by one group of facing head slide hold-down screw 733 and aforesaid splined shaft terminal pad 61 towards under a side fix.As preferred scheme, on facing head slide 73 and be concaved with a connection chamber 734 corresponding to the position of splined shaft terminal pad 61, the diameter of the diameter of this connection chamber 734 and splined shaft terminal pad 61 adapts, and the thickness of the degree of depth of connection chamber 734 and splined shaft terminal pad 61 adapts, in connection chamber 734 and offering screw 7341 corresponding to the position of aforesaid facing head slide hold-down screw 733, facing head slide hold-down screw 733 screws in screw 7341, thereby splined shaft terminal pad 61 is fixing in the interior realization of connection chamber 734 and facing head slide 73.Facing head slide 73 is towards a side of guide-rail plate 72 and be fixed with guide block 731 corresponding to the position of pair of guide rails 721, and guide block 731 is slidingly fitted with guide rail 721; The right side that facing head slide 73 is shown position state back to a side of guide-rail plate 72 is configured to the facing head slide inclined plane 732 tilting from top to bottom, on facing head slide inclined plane 732, be screwed a sliding seat guide block 7321, slide guide block 7321 forms towards a side of line rail chair 75 the sliding tray 73211(Fig. 3 that has shape of cross section to be swallow-tail form and shows).Facing head translation slide 74 is towards a upper side towards a side of flat rotation set 71 and be fixed with guide block 741 corresponding to the position of aforesaid a pair of facing head translation carriage rail 713, and facing head translation carriage rail 713 indicates with the sliding guide groove 7411(Fig. 1 on guide block 741) be slidably matched.Line rail chair 75 use line rail chair hold-down screw 753(Fig. 2 show) be fixed on facing head translation slide 74 towards a upper side, and be positioned at one end of facing head translation slide 74.As shown in Figure 2, line rail chair 75 through aforesaid line rail chair step down chamber 71111 probe in flat rotation set chamber 711 and this line rail chair 75 towards aforesaid facing head slide inclined plane 732 one side form have one from bottom to top tilt line rail chair inclined plane 751, on this line rail chair inclined plane 751 and in the position of the sliding tray 73211 corresponding to aforesaid slide guide block 7321, show with line rail chair guide rail hold-down screw 75111(Fig. 1) be fixed with a line rail chair guide rail 7511, this line rail chair guide rail 7511 is slidably matched with sliding tray 73211.Again, the bottom of online rail chair 75 offers the breach 752 of stepping down, and this breach 752 of stepping down also can claim engages indentation, and match with aforesaid diapire 7111 (Fig. 2 signal).Boring cutter bar holder 76 both can directly be formed in facing head translation slide 74 towards under a side, also fixing by riveted joint, welding or other similar fixed form and facing head translation slide 74 after boring cutter bar holder 76 can being made separately, the present embodiment is selected the former.In the time that use is of the present invention, by fixing with boring cutter bar holder 76 boring cutter bar 761 with boring cutter 7611.

because facing head slide inclined plane 732 is corresponding with line rail chair inclined plane 751, again due to the incline direction (tilting from top to bottom) on facing head slide inclined plane 732 and the incline direction (tilting from bottom to top) on line rail chair inclined plane 751, therefore facing head slide 73 is more to bottom offset, just make the degree of eccentricity of boring cutter bar 761 larger, on the contrary less.

applicant it should be noted that: if guide rail 721 and the position of guide block 731 are exchanged and/or slide guide block 7321 and line rail are recognized to the position of catching up with rail 7511 and exchange, should be considered as so equivalence and substitute and still belong to technical scheme category disclosed by the invention.

refer to Fig. 4, although because bellmouth boring device of the present invention shows as the absolute construction having a style of one's own, need to match with numerical control borer, therefore figure 4 illustrates the bed body 1 of numerical control borer under use state.Again, according to known technology, numerical control borer 1 has a work piece platform 11 and a column 12, and column 12 has column chamber 21.On bed body 1, be equipped with one for making the boring head elevating bracket reciprocating mechanism 8 of boring head elevating bracket 2 liftings of the present invention, for the ease of boring head elevating bracket 2 is connected with this boring head elevating bracket reciprocating mechanism 8, be therefore fixed with the engaging lug 23 that a pair of position corresponds to each other at the top of boring head elevating bracket 2.

preferably but not the boring head elevating bracket reciprocating mechanism 8 being definitely limited to comprises drive motors 81, reduction box 82, screw rod 83, bolt and nut 84, pair of sprocket axle bearing support 85, pair of sprocket axle 86, a pair of conduction chain 87 and boring head elevating bracket movable block guide rail 88, drive motors 81 is for having the motor of rotating function, coordinate with reduction box 82 transmissions and be fixed on reduction box supporting base 821 together with drive motors 81 by reduction box 82, reduction box supporting base 821 is fixed in the column chamber 121 of described column 12, the upper end of screw rod 83 and reduction box 82 are in transmission connection, and the lower end of screw rod 83 is bearing on screw bolt seat 831 rotationally, screw bolt seat 831 is fixed in column chamber 121, bolt and nut 84 screws on screw rod 83, and these bolt and nut 84 use bolt and nut screws 841 be fixed on boring head elevating bracket 2 and be fixedly connected with piece towards the piece 24(that is connected of column 12 1 sides) be fixedly connected with.Pair of sprocket axle bearing support 85 corresponds to each other, and be fixed on the top of column 12, pair of sprocket axle 86 is parallel and be bearing in rotationally between pair of sprocket axle bearing support 85, respectively be fixed with a sprocket wheel 861 at the two ends of each sprocket shaft 86, the wherein middle part of a conduction chain 87 in a pair of conduction chain 87 is nested with on the sprocket wheel 861 of one end that is fixed on pair of sprocket axle 86, and the middle part of another root conduction chain 87 in a pair of conduction chain 87 is nested with on the sprocket wheel 861 of the other end that is fixed on pair of sprocket axle 86, one end of a pair of conduction chain 87 is connected with described engaging lug 23, and the other end is introduced in described column chamber 121 and be connected with a balancing weight 871, boring head elevating bracket movable block guide rail 88 has a pair of, longitudinally be fixed on concurrently column 12 on the outer wall of a side of described boring head elevating bracket 2 each other, and also can claim boring head elevating bracket sliding shoe with described a pair of boring head elevating bracket movable block 22() be slidably matched.Aforesaid drive motors 81 is connected with the electric control box electrical control of numerical control borer.The workseat mobile motor 13 being illustrated on a body 1 moves for ordering about the workseat 111 being arranged at movably in work piece platform 11, and this workseat mobile motor 13 with rotating function is connected with the electric control box electrical control of numerical control borer equally.

in the time that the drive motors 81 of boring head elevating bracket reciprocating mechanism 8 is worked clockwise or counterclockwise, slow down and drive screw rod 83 do clockwise or be rotated counterclockwise by reduction box 82 through reduction box 82, thereby drive by screw rod 83 bolt and nut 84 upstream or downstream that are mated, and then drive boring head elevating bracket 2 to move up or down by bolt and nut 84 through the piece 24 that is connected.In the time that boring head elevating bracket 2 moves up because one end of a pair of conduction chain 87 and the engaging lug 22 of boring head elevating bracket 2 are connected, again because the other end of a pair of conduction chain 87 is connected with balancing weight 871, it is stable and move up effortlessly that the boring head elevating bracket movable block 22 that therefore can ensure boring head elevating bracket 2 is following boring head elevating bracket movable block guide rail 88.That is to say, when boring head elevating bracket 2 is up, conduction chain 87 is received to column chamber 121, and vice versa.

applicant sketches operation principle of the present invention in conjunction with Fig. 1 to Fig. 4, and for the ease of the public's understanding, applicant has illustrated a workpiece 9 in Fig. 4.Before boring goes out bellmouth 91, first be drilled with and portal on workpiece 9 by technique separately, then being opposite to workpiece 9 on workseat 111 by apparatus of the present invention, to carry out boring be bore hole, specifically: make boring head elevating bracket 2 descending by the work of boring head elevating bracket reciprocating mechanism 8, simultaneously, the leading screw drive motors 42 of splined shaft elevating mechanism 4 is worked, make to move on feed screw nut seat 45, drive splined shaft 6 up by moving on feed screw nut seat 45, drive the facing head slide 73 of eccentric moving mechanism 7 up by the splined shaft terminal pad 61 of splined shaft 6, line rail chair 75 is drawn close to the center position of main shaft 5, boring cutter bar 761 degree of eccentricitys diminish, i.e. low up along with facing head slide 73, boring cutter bar 761 is more and more less with respect to the departure degree at the center of main shaft 5, until complete the boring of bellmouth 91.In said process, make main shaft 5 in rotation status by main shaft rotary drive mechanism 3, make boring cutter bar lifting and eccentric moving mechanism 7 in rotation status by the spindle coupling disc 52 of main shaft 5.

Claims (8)

1. a kind of numerical control borer bellmouth boring device, described numerical control borer includes a body (1), this body (1) has a work piece platform (11) and a column (12), it is characterized in that described bellmouth boring device comprises a boring head elevating bracket (2), this boring head elevating bracket (2) is connected with described column (12) lifting under use state, and this boring head elevating bracket (2) is corresponding to the top of described work piece platform (11), one main shaft rotary drive mechanism (3), this main shaft rotary drive mechanism (3) is arranged on a side at the top of described boring head elevating bracket (2), one splined shaft elevating mechanism (4), this splined shaft elevating mechanism (4) is arranged on the opposite side at the top of boring head elevating bracket (2), and corresponding with main shaft rotary drive mechanism (3), with longitudinal state be bearing in rotationally on described boring head elevating bracket (2) and form a main shaft (5) that has a splined shaft resigning hole (51) from one end to the other side in the central authorities of short transverse, it is corresponding with described splined shaft elevating mechanism (4) that the upper end of this main shaft (5) leans out the top of boring head elevating bracket (2), and be in transmission connection with described main shaft rotary drive mechanism (3), and leaning out bottom and the expansion of boring head elevating bracket (2), the lower end of main shaft (5) is provided with a spindle coupling disc (52), be arranged on up or down the splined shaft (6) in described splined shaft resigning hole (51), the upper end of this splined shaft (6) leans out splined shaft resigning hole (51) and is connected with described splined shaft elevating mechanism (4), and the described upper end of this splined shaft (6) also coordinates with the inwall key of splined shaft resigning hole (51) and uses and drive its rotation, the lower end of splined shaft (6) to lean out equally splined shaft resigning hole (51) and form by described main shaft (5) to have a splined shaft terminal pad (61), one boring cutter bar lifting and eccentric moving mechanism (7), this boring cutter bar lifting is connected with described spindle coupling disc (52) with eccentric moving mechanism (7), and be connected with described splined shaft terminal pad (61), wherein, form and have a leading screw resigning hole (62) in the axial central authorities of the described upper end of described splined shaft (6), described splined shaft elevating mechanism (4) comprises support (41), leading screw drive motors (42), leading screw (43), feed screw nut (44) and feed screw nut seat (45), support (41) is fixed on the top of described boring head elevating bracket (2), this support (41) forms a support chamber (411), and on the outer wall of the side of this support (41), offer the feed screw nut seat opening (414) of stepping down, both sides in the short transverse of the opening (414) of stepping down corresponding to this feed screw nut seat are respectively fixed with a feed screw nut seat guide rail (412) with longitudinal state, the shape of cross section of feed screw nut seat guide rail (412) is swallow-tail form, leading screw drive motors (42) is fixed on leading screw drive motors seat (422), leading screw drive motors seat (422) is fixed on the top of described support (41), the upper end of leading screw (43) is bearing on support (41) rotationally, and be in transmission connection by coupling band (431) and the leading screw drive motors axle (421) of leading screw drive motors (42), the lower end of leading screw (43) is stretched in described leading screw resigning hole (62), feed screw nut (44) is disposed on leading screw (43) with thread fiting mode, and be fixedly connected with feed screw nut seat (45), and feed screw nut seat (45) leans out the described feed screw nut seat opening (414) of stepping down, and be slidably matched with described a pair of feed screw nut seat guide rail (412), match with described feed screw nut seat (45) by splined shaft pivotable supporting device (63) in the described upper end of described splined shaft (6), on the outer wall of the upper end of splined shaft (6), form and have one group of spline (64) that is projected on the outer wall surface of splined shaft (6) with interval state, on the hole wall of the splined shaft resigning hole (51) of described main shaft (5) and offering the spline (511) that quantity equates with the quantity of spline (64) corresponding to the position of spline (64), spline (64) matches with spline (511), the degree of depth of described leading screw resigning hole (62) is that the stroke moving up and down with described leading screw (43) adapts, described boring cutter bar lifting and eccentric moving mechanism (7) comprise flat rotation set (71), guide-rail plate (72), facing head slide (73), facing head translation slide (74), line rail chair (75) and boring cutter bar holder (76), flat rotation set (71) and described spindle coupling disc (52) towards under a side fix, upper and the inclined to one side side of diapire (7111) in the flat rotation set chamber (711) of this flat rotation set (71) offers the line rail chair chamber (71111) of stepping down, be provided with a guide-rail plate chamber (712) at the side opening of flat rotation set (71), guide-rail plate (72) is positioned at flat rotation set chamber (711), and fixing in the position corresponding to described guide-rail plate chamber (712) and described flat rotation set (71), form and have a pair of longitudinal parallel guide rail (721) each other towards a side of facing head slide (73) at guide-rail plate (72), facing head slide (73) and described splined shaft terminal pad (61) towards under a side be fixedly connected with, at this facing head slide (73) towards a side of described guide-rail plate (72) and be fixed with guide block (731) corresponding to the position of described pair of guide rails (721), guide block (731) is slidably matched with guide rail (721), and facing head slide (73) is configured to the facing head slide inclined plane (732) tilting from top to bottom back to a side of described guide-rail plate (72), and on this facing head slide inclined plane (732), be fixed with a slide guide block (7321), facing head translation slide (74) coordinates with the basal sliding of described flat rotation set (71), line rail chair (75) is fixed on facing head translation slide (74) towards a upper side, and be positioned at one end of facing head translation slide (74), this line rail chair (75) is insinuated in described flat rotation set chamber (711) in the position in the chamber (71111) of stepping down corresponding to described line rail chair, and match with described diapire (7111), wherein: line rail chair (75) is configured to the line rail chair inclined plane (751) tilting from bottom to top towards a side on described facing head slide inclined plane (732), be fixed with a line rail chair guide rail (7511) in the short transverse on this line rail chair inclined plane (751), this line rail chair guide rail (7511) is slidably matched with described slide guide block (7321), boring cutter bar holder (76) be fixed on described facing head translation slide (74) towards under a side.

2. numerical control borer according to claim 1 bellmouth boring device, it is characterized in that described main shaft rotary drive mechanism (3) comprises spindle drive motor (31), initiative driver (32), driven drive (33) and driving-belt (34), spindle drive motor (31) is fixed on spindle drive motor seat (312), and spindle drive motor seat (312) is fixed on the top of described boring head elevating bracket (2), the spindle drive motor axle (311) of spindle drive motor (31) probes in the drive motors seat chamber (3121) of spindle drive motor seat (312), initiative driver (32) is fixed on spindle drive motor axle (311), driven drive (33) is fixed on the described upper end of described main shaft (5), one end of driving-belt (34) is nested with on initiative driver (32), the other end is nested with on driven drive (33).

3. numerical control borer according to claim 2 bellmouth boring device, is characterized in that described initiative driver (32) and driven drive (33) are belt pulley or synchronous pulley, and described driving-belt is driving belt or Timing Belt.

4. numerical control borer according to claim 1 bellmouth boring device, it is characterized in that upper at described feed screw nut seat (45) and be fixed with a pair of feed screw nut seat guide pad (451) corresponding to the position of described a pair of feed screw nut seat guide rail (412), this a pair of feed screw nut seat guide pad (451) forms and has shape of cross section to be the guide pad sliding tray of swallow-tail form towards a side of described feed screw nut seat guide rail (412), guide pad sliding tray and feed screw nut seat guide rail (412) are slidably matched, and offer the stepped hole (452) of a up/down perforation corresponding to the position of described leading screw (43) at feed screw nut seat (45), described feed screw nut (44) is fixedly connected with feed screw nut seat (45) on the top corresponding to stepped hole (452), and described splined shaft pivotable supporting device (63) is positioned at the bottom of stepped hole (452), this splined shaft pivotable supporting device (63) comprises splined shaft rotating support bearing (631), bearing gland (632) and bearing cover (633), splined shaft rotating support bearing (631) is nested with the described upper end at described splined shaft (6), and be positioned at the bottom of described stepped hole (452), bearing gland (632) is arranged in stepped hole (452), and corresponding to the top of splined shaft rotating support bearing (631), this bearing gland (632) is fixedly connected with spline (64) by one group of splined shaft attachment screw (6321) or is fixedly connected with the end face of splined shaft (6), bearing cover (633) is positioned at the below of splined shaft rotating support bearing (631) and the bottom at the bottom corresponding to stepped hole (452) and described feed screw nut seat (45).

5. numerical control borer according to claim 1 bellmouth boring device, it is characterized in that forming on described boring head elevating bracket (2) and in the below corresponding to described splined shaft elevating mechanism (4) spindle hole (21) that has up/down perforation, the middle part of the length direction of described main shaft (5) is by being nested with the main shaft upper bearing (metal) (53) on main shaft (5) and being bearing in rotationally in spindle hole (21) corresponding to the main shaft lower bearing (54) of main shaft upper bearing (metal) (53) below, above and in the position corresponding to described main shaft upper bearing (metal) (53) form and have a shaft shoulder (55) at main shaft (5), the downside of main shaft upper bearing (metal) (53) is resisted against on the shaft shoulder (55), and that the upside of main shaft upper bearing (metal) (53) is disposed in upper locking nut (56) on main shaft (5) by screw thread is spacing, the downside of main shaft lower bearing (54) is by limiting with the fixing bearing cap (541) of boring head elevating bracket (2), and that the upside of main shaft lower bearing (54) is disposed in lower locking nut (57) on main shaft (5) by screw thread is spacing.

6. numerical control borer according to claim 1 bellmouth boring device, it is characterized in that being fixed with parallel a pair of facing head translation carriage rail (713) in the bottom of described flat rotation set (71), and at described facing head translation slide (74) towards a upper side and be fixed with guide block (741) corresponding to the position of facing head translation carriage rail (713), guide block (741) is slidably matched with facing head translation carriage rail (713).

7. numerical control borer according to claim 1 bellmouth boring device, it is characterized in that in the bottom of the short transverse of described line rail chair (75) and offer the breach (752) of stepping down in the position of the diapire corresponding to described (7111), this breach of stepping down (752) matches with diapire (7111).

8. numerical control borer according to claim 1 bellmouth boring device, it is characterized in that being fixed with boring head elevating bracket movable block (22) at described boring head elevating bracket (2) towards a side of the column (12) of described bed body (1), this boring head elevating bracket movable block (22) matches with the boring head elevating bracket reciprocating mechanism (8) being arranged on column (12).