CN206717070U - A kind of large-sized boiler drum and header high-speed numeric control drilling machine - Google Patents

A kind of large-sized boiler drum and header high-speed numeric control drilling machine Download PDF

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Publication number
CN206717070U
CN206717070U CN201720215881.8U CN201720215881U CN206717070U CN 206717070 U CN206717070 U CN 206717070U CN 201720215881 U CN201720215881 U CN 201720215881U CN 206717070 U CN206717070 U CN 206717070U
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China
Prior art keywords
support frame
axis
header
base
drilling machine
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CN201720215881.8U
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Chinese (zh)
Inventor
杨善磊
于朝霞
孙明教
陈石楠
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JINAN SHUOCHAO CNC EQUIPMENT Co Ltd
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JINAN SHUOCHAO CNC EQUIPMENT Co Ltd
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Abstract

The utility model discloses a kind of large-sized boiler drum and header high-speed numeric control drilling machine, belong to workpiece machining equipment field.The utility model includes drilling sector, workpiece support mechanism and NC dividing head;The workpiece support mechanism and NC dividing head are installed on lathe bed and can moved along lathe bed X axis;The drilling sector is installed on base and by can be along gantry that base X axis moves across standing on lathe bed;The lathe bed is less than base;The vertical ram that can be adjusted along Y direction is installed on described gantry, the drill unit that can be moved along vertical ram in Z-direction is housed on the vertical ram;The workpiece support mechanism includes some fixed supporting mechanisms and some lifting supporting mechanisms that can hold up workpiece along Z axis.The utility model substantially increases the efficiency and precision of drum and header processing, and the utility model can be additionally used in the Drilling operation of other pipe fitting workpiece.

Description

A kind of large-sized boiler drum and header high-speed numeric control drilling machine
Technical field
The present invention relates to processing equipment field, more particularly to a kind of large-sized boiler drum and header high-speed numeric control drilling machine.
Background technology
The collecting box pipe that boiler industry uses at this stage is processed using radial drilling machine or numeric control multispindle borer more, but drum And collecting box pipe hole number is more, and multiple angles of body radial direction are distributed in, use radial drilling machine or general NC drilling machine processing effect Rate is low, low precision.
The country lacks the special processing equipment for pipe fittings such as drum and collecting box pipes at present.
The content of the invention
In order to make up the deficiencies in the prior art, the invention provides it is a kind of efficiently, high accuracy processing large-sized boiler drum and The high-speed numeric control drilling machine of header pore.The numerical control drilling machine of the present invention is exclusively used in pipe fitting processing, and especially drum and header etc. are large-scale Pipe fitting is processed.
Design feature of the present invention for drum and collecting box pipe, there is provided one kind is exclusively used in boiler industry drum, collecting box pipe adds The flexibility of work can not only process drum but also can process the Multipurpose high-speed numerical control drilling machine of header.
The technical scheme is that:
A kind of large-sized boiler drum and header high-speed numeric control drilling machine, including drilling sector, workpiece support mechanism and numerical control Dividing head;The workpiece support mechanism and NC dividing head are installed on lathe bed and can moved along lathe bed X axis;The drilling sector It is installed on base and by can be along gantry that base X axis moves across standing on lathe bed;The lathe bed is less than base;On described gantry The vertical ram that can be adjusted along Y direction is installed, is equipped with what can be moved along vertical ram in Z-direction on the vertical ram Drill unit;The workpiece support mechanism includes some fixed supporting mechanisms and some liftings that can hold up workpiece along Z axis Supporting mechanism.
Preferably, the NC dividing head includes the NC dividing head for being arranged at X axis rail on the lathe bed Casing, be provided with the NC dividing head casing can along the dividing head slide plate that Z axis moves, on the dividing head slide plate fixation set There is the pivoting support with external tooth, the pivoting support is provided with the self-centering chuck for being used for clamping workpiece numerical-controlled indexing, is used for The planetary reducer of the self-centering chuck revolution is driven to be engaged with pivoting support;Lowered for driving on the self-centering chuck Whole lifting decelerator is fixedly connected by leading screw with the dividing head slide plate.
Preferably, the lifting supporting mechanism includes being arranged at the lifting support of X axis rail on the lathe bed Frame base, the lifting support frame base are provided with V-type support frame, the V-type support frame be provided with some Z axis to guiding Plate, the V-type turning rolls for support workpiece are installed on the V-type support frame, the lifting support frame bottom by the guide plate Seat is provided with the hoist cylinder for being used for holding up V-type turning rolls Z axis.
Further, the lifting support frame base is provided with the drift being used for the V-type support frame Z axis to adjustment, The lifting support frame base is provided with the double-deck self-locking mechanism for being used for locking the V-type support frame height.
Preferably, the fixed supporting mechanism includes being arranged at the fixed support of X axis rail on the lathe bed Frame base, the fixing support rack base are provided with V-type support frame, and the V-type support frame is provided with the branch for loaded work piece Stay.
Further, the fixing support rack base is provided with the drift being used for the V-type support frame Z axis to adjustment, The fixing support rack base is provided with the double-deck self-locking mechanism for being used for locking the V-type support frame height.
Preferably, it is equipped with Y-axis adjustment on the lifting support frame base and the fixing support rack base Drift, and provided with being used to lock the double-deck self-locking mechanism of V-type support frame height.
Preferably, it is fixed with the vertical ram across standing on the drill unit and be located at the drilling Servo-actuated binder oil cylinder in front of unit head.
Preferably, the drill unit includes high-speed main spindle, spindle motor, knife machining mechanism and power head case Body.
Preferably, the base is provided with the hydraulic locking mechanism for being used for locking described gantry.
Beneficial effects of the present invention are:
The present invention, which coordinates Special tooling clamp to realize by increasing clamping range, can not only process drum but also can process header Multipurpose target.
Multiple fixed supporting mechanisms are installed, fixed supporting mechanism is rigid support, to improve workpiece rigidity, is subtracted on lathe bed Few vibration, improves cutter life.
Multiple lifting supporting mechanisms are installed, lifting supporting mechanism is flexible support, can be in feeding or rotation on lathe bed Lifted during positioning, reduce frictional force and feeding impulsive force caused by rotation.
The rotational positioning that workpiece support mechanism is cooperated with NC dividing head when completing work pieces process, setting accuracy is very It is high.
Servo-actuated binder oil cylinder is advanced and does not influence the feed motion of drill unit simultaneously with drill unit, can added Drum, collecting box pipe are pushed down before work, to reduce the vibrations in drilling process, improves machining accuracy.
Through experiment, numerical control drilling machine processing drum and header ratio of precision radial drilling machine of the present invention or numeric control multispindle borer processing essence Spend high by 363%.
It is various that large-sized boiler of the present invention with drum and header high-speed numeric control drilling machine is exclusively used in boiler industry drum, collecting box pipe etc. The processing of pipe fitting, the processing operation of tubular workpiece is facilitated, production efficiency is improved, reduces labor intensity, it is corresponding to reduce Labour cost.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the side structure schematic view of large-sized boiler drum of the present invention and header high-speed numeric control drilling machine;
Fig. 2 is the positive structure diagram of large-sized boiler drum of the present invention and header high-speed numeric control drilling machine;
Fig. 3 is the positive structure diagram of large-sized boiler drum of the present invention and header high-speed numeric control drilling machine drilling sector;
Fig. 4 is the isometric structural representation of large-sized boiler drum of the present invention and header high-speed numeric control drilling machine drilling sector Figure;
Fig. 5 is the facing structure signal of large-sized boiler drum of the present invention and header high-speed numeric control drilling machine NC dividing head Figure;
Fig. 6 is the side view structure signal of large-sized boiler drum of the present invention and header high-speed numeric control drilling machine NC dividing head Figure;
Fig. 7 is the isometric structural representation of large-sized boiler drum of the present invention and header high-speed numeric control drilling machine NC dividing head Figure;
Fig. 8 is the facing structure signal that large-sized boiler drum of the present invention and header high-speed numeric control drilling machine lift supporting mechanism Figure;
Fig. 9 shows for the isometric geodesic structure of large-sized boiler drum of the present invention and header high-speed numeric control drilling machine lifting supporting mechanism It is intended to;
The facing structure that Figure 10 fixes supporting mechanism for large-sized boiler of the present invention with drum and header high-speed numeric control drilling machine is shown It is intended to;
Figure 11 is the isometric geodesic structure that large-sized boiler of the present invention fixes supporting mechanism with drum and header high-speed numeric control drilling machine Schematic diagram;
Figure 12 shows for the isometric geodesic structure of large-sized boiler drum of the present invention and header high-speed numeric control drilling machine drill unit It is intended to;
Figure 13 shows for the facing structure of large-sized boiler drum of the present invention and the servo-actuated binder oil cylinder of header high-speed numeric control drilling machine It is intended to;
In figure:1. base, 2. adjustable ground screws, 3. servo-actuated binder oil cylinders, 4. drill units, 5. vertical rams, 6. gantry, 7. chip removal systems, 8. lathe beds, 9. lifting supporting mechanisms, 10. fixation supporting mechanisms, 11. NC dividing heads, 12. drive gear rack pair, 13. handles, 14. travelling gear rack pairs, 15. linear roller guideways, 16. cylinder brackets, 17. locking cylinder, 18 steel guide rails, 19. lock-screws, 20. operating desks, 21. electrical systems, 23. balancing cylinders, 24. make by oneself Heart chuck, 25. NC dividing head casings, 26. accurate planetary reducers, 27. dividing head slide plates, 28. lifting decelerators, 29. Pivoting support, 30. travelling gears, 31. support frame bases, 32. V-type support frames, 33. guiding copper coins, 34. V-type turning rolls, 35. support roller, 36. hoist cylinders, 37. drifts, 38. double-deck self-locking mechanisms, 39. support bars, 40. high-speed main spindles, 41. masters Spindle motor, 42. knife machining mechanisms, 43. timing belts and precise ball screw pair, 44. power head boxes.
Embodiment
Following examples are the specific embodiment of the present invention, can also be adjusted on the basis of the embodiment.
Embodiment 1
As shown in Fig. 1-Figure 13, large-sized boiler drum of the invention and header high-speed numeric control drilling machine include base 1, lathe bed 8th, drilling sector, workpiece support mechanism, NC dividing head 11, chip removal system 7, hydraulic system, electrical system 21 and personnel are facilitated The operating desk 20 of observation and operation.
Drilling sector is located at base 1;Workpiece support mechanism and NC dividing head 11 are located at lathe bed 8.Lathe bed 8 is less than base 1. In general, lathe bed 8 is placed in cellar.
Base 1 and lathe bed 8 are used as parts of machine tool, using cast structure, timeliness destressing processing, have preferably rigidity And stability, gather on its bottom surface many adjustable ground screws 2, in that context it may be convenient to which adjustment ensures the flatness in upper rail face and straight Dimension.
Drilling sector includes gantry 6, vertical ram 5, drill unit 4 and servo-actuated binder oil cylinder 3.Base 1 is flush system Structure, respectively there is two high-bearing capacity straight ball-guides on base 1, and the movement of the X axles of gantry 6 is straight on base 1 using being fixed on Line roller guide is secondary to be oriented to, and the side of base 1 is provided with diagonal-cut rack, and gantry 6 is using servomotor through precision speed reduction device by disappearing Gap travelling gear rack pair 14 drives.
Gantry 6 uses lead frame structure, and the movement of the X-axis of gantry 6 is using two high-bearing capacities 65 being fixed on base 1 Number line slideway auxiliary is oriented to, and driving is driven using two-side synchronous, and guide rail has eliminated gap with rack-and-pinion, respond, is determined Position precision is high, and the driving of its two-side synchronous ensure that moving in parallel for gantry 6, ensure the perpendicularity to X-axis in any position Y-axis. Hydraulic locking mechanism is provided between gantry 6 and base 1(Locking cylinder 17), when motor stalls, locking cylinder clamps, and makes Gantry 6 can lock on base 1, it is ensured that the positioning precision and fast positioning that X-axis is done.
Equipped with the vertical ram 5 that can be adjusted along Y direction on gantry 6(For example use screw rod to vertical ram 5 in Y-axis side To fine setting, to realize that drill unit intersects with work centre line), equipped with can be along vertical ram 5 in Z axis side on vertical ram 5 To mobile drill unit 4.It is fixed with vertical ram 5 across standing on drill unit 4 and positioned at the front of drill unit 4 Servo-actuated binder oil cylinder 3.Servo-actuated binder oil cylinder 3 is connected on vertical ram 5 by cylinder bracket 16, and cylinder bracket 16 is " Jiong " Character form structure, across drill unit 4, and the feed motion of drill unit 4 is not influenceed.After gantry 6 is moved to bore position, Servo-actuated binder oil cylinder 3 can push down drum, collecting box pipe, and to reduce the vibration of drilling process, its cramping is adjustable.
Drill unit 4 is arranged on vertical ram 5, is oriented to by linear roller guideway 15, is driven using servomotor Timing belt and precise ball screw pair 43 drive vertically(Z axis)Up and down, numeral feeding is realized.It is drill unit 4, vertical The movement of ram 5 is oriented to using two linear roller guideways 15, and driving drives timing belt and precise ball using AC servomotors Leading screw auxiliary driving, transversely(Y-axis)It is mobile.Z axis motor carries automatic band-type brake function, and in the event of a power failure, automatic band-type brake will Motor shaft is held tightly, is allowed to rotate.During work, when drill bit is not in contact with workpiece, fast feed;After bit contact workpiece, Work is automatically switched to enter.After drill bit drills through workpiece, rewind is automatically switched to;Workpiece, which is left, when drill bit end reaches setting position When, next hole position is moved to, realizes automatic cycle.And drilling blind hole, milling, chamfering, chip breaking, automatic chip-removal etc. can be realized Function, improve labor productivity.
Drill unit 4 is square ram structure, by high-speed main spindle 40, spindle motor 41, knife machining mechanism 42, power head case Body 44 forms.Unit head drives the structure of the synchronous pulley driving rotation transmission moment of torsion of high-speed main spindle 40 using spindle motor 41, its High-speed main spindle rotating speed is up to 3000r/min.The unit head is slowed down using the synchronized band of servomotor, synchronizing wheel, straight-line ball Guideway is oriented to, and drives vertical ball-screw to rotate, and realizes numeral feeding.Unit head coordinates main shaft equipped with hydraulic pressure knife striking cylinder 45 ° of four claw tool-broaching mechanism, realize automatic loose knife and automatic tool-broaching action, facilitate the handling of cutter.Vertical ram 5 and gantry Lead screw pair is installed between 6, is intersecting in process for adjusting main-shaft axis and axis of workpiece.
Workpiece support mechanism includes fixed supporting mechanism 10 and lifting supporting mechanism 9;Hard steel guide rail is set on lathe bed 8 18, it which is provided with lifting supporting mechanism 9, fixed supporting mechanism 10 and NC dividing head 11.Lift supporting mechanism 9, fixed support Mechanism 10 and NC dividing head 11 are oriented to using hard steel guide rail 18, and use servomotor through precision speed reduction device by drive gear Rack pair 12 drives.Specifically, the side of lathe bed 8 is provided with driving rack, driving rack and lifting supporting mechanism 9, fixed support machine Drive gear engagement on structure 10 and NC dividing head 11, with driving lifting supporting mechanism 9, fixed supporting mechanism 10 and numerical control point Degree first 11 moves along X axis.
NC dividing head 11 includes NC dividing head casing 25, dividing head slide plate 27, pivoting support 29, self-centering chuck 24th, accurate planetary reducer 26, lifting decelerator 28, travelling gear 30.
NC dividing head casing 25 is arranged at the X axis rail on lathe bed 8, is oriented to by steel guide rail, is passed through using servomotor Precision speed reduction device and drive gear rack pair 12 drive, can be along lathe bed length direction(X axis)It is mobile, to adapt to different length Workpiece.It is provided with and can be fixed with dividing head slide plate 27 along the dividing head slide plate 27 that Z axis moves on NC dividing head casing 25 Pivoting support 29 with external tooth, pivoting support 29 are provided with the self-centering chuck 24 for being used for clamping workpiece numerical-controlled indexing, revolution Supporting 29 is external tooth type, and tooth thereon is engaged with travelling gear 30 and driven by accurate planetary reducer 26, completes self-centering card The revolution action of disk 24, controls the indexing of self-centering chuck 24;Lifting for driving self-centering chuck to be adjusted about 24 is slowed down Machine 28 is fixedly connected by leading screw with dividing head slide plate 27, and lifting decelerator is driven above and below dividing head slide plate by ball screw assembly, Mobile, real chuck lifts the action with falling.Drive of the self-centering chuck in lifting decelerator 28 and accurate planetary reducer 26 Dynamic lower clamping, indexing, the feeding action for completing workpiece.Preferably, NC dividing head casing 25 is additionally provided with balancing cylinder 23, balance Oil cylinder 23 heads on dividing head slide plate 27.
The upper table surface of lathe bed 8 is provided with multiple lifting supporting mechanisms and some fixed supporting mechanisms, it is each lift supporting mechanism and Fixed supporting mechanism is oriented to by the hard steel guide rail 18 of X axis, and side is provided with gear, is engaged with the rack on lathe bed 8, by people Work is driven by handle 13, can need any movement according to processing, and lock by locking device.
Lifting supporting mechanism 9 includes support frame base 31, and the steel for the X axis that support frame base 31 is arranged on lathe bed 8 is led Rail.Support frame base 31 is provided with V-type support frame 32, V-type support frame 32 be provided with some Z axis to guiding copper coin 33, be used for The V-type turning rolls 34 of support workpiece is installed on V-type support frame 32 by being oriented to copper coin, and support frame base 31, which is provided with, to be used for V The hoist cylinder 36 that type turning rolls 34 is held up along Z axis.V-type turning rolls 34 is provided with support roller 35.Support frame base 31 is provided with For being provided with high for locking V-type support frame 32 to drift 37 of the V-type support frame 32 along Z axis to adjustment, support frame base 31 The double-deck self-locking mechanism 38 of degree(Such as lock-screw 19).
Fixed supporting mechanism 10 includes support frame base 31, and the steel for the X axis that support frame base 31 is arranged on lathe bed 8 is led Rail.Support frame base 31 is provided with V-type support frame 32, and V-type support frame 32 is provided with the support bar 39 for loaded work piece.Support Frame base 31, which is provided with, to be used for drift 37 of the V-type support frame 32 along Z axis to adjustment, and support frame base 31, which is provided with, to be used to lock The double-deck self-locking mechanism 38 of the height of V-type support frame 32.
Preferably, the drift that Y-axis adjusts is equipped with lifting support frame base and fixing support rack base, and Provided with the double-deck self-locking mechanism for locking V-type support frame height.
Lifting supporting mechanism 9 and fixed supporting mechanism 10 promote drift 37 to realize that V-type supports using manual drive screw rod Double-deck self-locking mechanism is leaned in the precision lift of frame 32, lifting afterwards in place, keeps V-type support frame 32 highly constant, ensures on workpiece both ends The straight line that bus is linked to be and gantry-travelling straight line parallel.Workpiece rigidity can be improved using more than one piece collecting box pipe supporting mechanism, subtracted The vibration of few process.
There is a V-type turning rolls 34 on lifting supporting mechanism, the effect of V-type turning rolls 34 is in feeding or lifted during rotational positioning Rise, realize that drum tube or collecting box pipe rotate on roller, reduce frictional force and feeding impulsive force caused by rotation.It is automatic during drilling Fall on below fixed supporting mechanism.
Workpiece is supported to improve workpiece rigidity by fixed, is reduced vibration, is improved cutter life.And have enough Protection makes elevating mechanism not damaged by iron filings.
All supporting mechanisms have fine adjustment function(Z axles and Y axles), drum tube is long to occur deformation, passes through fine setting Ensure straight line and gantry-travelling straight line parallel that workpiece both ends Up Highway UHW is linked to be.In addition, the bearing support at support drum both ends should It can select without using Z axles and the fine adjustment function of Y direction of principal axis, to ensure drum tube both ends with centralized positioning and make workpiece both ends The straight line that Up Highway UHW is linked to be.It can be locked after fine setting.

Claims (10)

1. a kind of large-sized boiler drum and header high-speed numeric control drilling machine, including drilling sector, workpiece support mechanism and numerical control point Spend head;It is characterized in that:The workpiece support mechanism and NC dividing head are installed on lathe bed and can moved along lathe bed X axis;Institute State drilling sector and be installed on base and by can be along gantry that base X axis moves across standing on lathe bed;The lathe bed is less than base; The vertical ram that can be adjusted along Y direction is installed, being equipped with the vertical ram can be along vertical ram in Z axis on described gantry The drill unit of direction movement;The workpiece support mechanism include some fixed supporting mechanisms and it is some can be by workpiece along Z axis The lifting supporting mechanism of picking-up.
2. large-sized boiler drum as claimed in claim 1 and header high-speed numeric control drilling machine, it is characterised in that:The numerical control scale-division Head includes the NC dividing head casing for being arranged at X axis rail on the lathe bed, and being provided with the NC dividing head casing can The dividing head slide plate moved along Z axis, the pivoting support with external tooth, the pivoting support are fixed with the dividing head slide plate The self-centering chuck for being used for clamping workpiece numerical-controlled indexing is provided with, for driving the planetary reducer of the self-centering chuck revolution Engaged with pivoting support;Lifting decelerator for driving the self-centering chuck to adjust up and down passes through leading screw and the dividing head Slide plate is fixedly connected.
3. large-sized boiler drum as claimed in claim 1 and header high-speed numeric control drilling machine, it is characterised in that:The lifting support Mechanism includes being arranged at the lifting support frame base of X axis rail on the lathe bed, and the lifting support frame base is provided with V-type Support frame, the V-type support frame be provided with some Z axis to guide plate, the V-type turning rolls for support workpiece led by described The V-type support frame is installed on to plate, the lifting support frame base is provided with the lifting for being used for holding up V-type turning rolls Z axis Oil cylinder.
4. large-sized boiler drum as claimed in claim 3 and header high-speed numeric control drilling machine, it is characterised in that:The lifting support Frame base is provided with the drift being used for the V-type support frame Z axis to adjustment, and the lifting support frame base, which is provided with, to be used to lock The double-deck self-locking mechanism of the fixed V-type support frame height.
5. large-sized boiler drum as claimed in claim 1 and header high-speed numeric control drilling machine, it is characterised in that:The fixed support Mechanism includes being arranged at the fixing support rack base of X axis rail on the lathe bed, and the fixing support rack base is provided with V-type Support frame, the V-type support frame are provided with the support bar for loaded work piece.
6. large-sized boiler drum as claimed in claim 5 and header high-speed numeric control drilling machine, it is characterised in that:The fixed support Frame base is provided with the drift being used for the V-type support frame Z axis to adjustment, and the fixing support rack base, which is provided with, to be used to lock The double-deck self-locking mechanism of the fixed V-type support frame height.
7. large-sized boiler drum and header high-speed numeric control drilling machine as described in claim 4 or 6, it is characterised in that:The lifting The drift of Y-axis adjustment is equipped with support frame base and the fixing support rack base, and provided with for locking V-type support frame The double-deck self-locking mechanism of height.
8. large-sized boiler drum as claimed in claim 1 and header high-speed numeric control drilling machine, it is characterised in that:The vertical ram On be fixed with across standing on the drill unit and the servo-actuated binder oil cylinder in front of the drill unit.
9. large-sized boiler drum and header high-speed numeric control drilling machine as described in claim 1 or 8, it is characterised in that:The drilling Unit head includes high-speed main spindle, spindle motor, knife machining mechanism and power head box.
10. large-sized boiler drum as claimed in claim 1 and header high-speed numeric control drilling machine, it is characterised in that:On the base Provided with the hydraulic locking mechanism for locking described gantry.
CN201720215881.8U 2017-03-07 2017-03-07 A kind of large-sized boiler drum and header high-speed numeric control drilling machine Active CN206717070U (en)

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CN201720215881.8U CN206717070U (en) 2017-03-07 2017-03-07 A kind of large-sized boiler drum and header high-speed numeric control drilling machine

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Application Number Priority Date Filing Date Title
CN201720215881.8U CN206717070U (en) 2017-03-07 2017-03-07 A kind of large-sized boiler drum and header high-speed numeric control drilling machine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106735430A (en) * 2017-03-07 2017-05-31 济南硕超数控设备有限公司 A kind of large-sized boiler drum and header high-speed numeric control drilling machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106735430A (en) * 2017-03-07 2017-05-31 济南硕超数控设备有限公司 A kind of large-sized boiler drum and header high-speed numeric control drilling machine
CN106735430B (en) * 2017-03-07 2019-03-22 济南硕超数控设备有限公司 A kind of large-sized boiler drum and header high-speed numeric control drilling machine

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