CN204934695U - Vertical numerical control double end double-pole storehouse, gantry milling machine machining center - Google Patents

Vertical numerical control double end double-pole storehouse, gantry milling machine machining center Download PDF

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Publication number
CN204934695U
CN204934695U CN201520759164.2U CN201520759164U CN204934695U CN 204934695 U CN204934695 U CN 204934695U CN 201520759164 U CN201520759164 U CN 201520759164U CN 204934695 U CN204934695 U CN 204934695U
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Prior art keywords
slide unit
axis
gantry
double
unit
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CN201520759164.2U
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Inventor
曹建良
阮志强
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XI'AN BAOGANG STEEL MATERIAL PROCESSING DISTRIBUTION Co Ltd
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XI'AN BAOGANG STEEL MATERIAL PROCESSING DISTRIBUTION Co Ltd
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Abstract

The utility model relates to vertical numerical control double end double-pole storehouse, a kind of gantry milling machine machining center, comprises main slide unit unit, gantry beam unit, the main slide unit body of X-axis is provided with work piece platform and magnechuck/hydraulically operated fixture; Gantry beam unit is made up of two-way cross nc sliding table, on the two-way slide unit in crossbeam both sides, is provided with two special vertical main shaft milling heads, to realize the milling to workpiece; Outside crossbeam two, respectively disc type tool magazine is installed; Under the programmed instruction of digital control system controls, realize processing the curved surface symmetrical expression of workpiece is bilateral simultaneously.The attached unit that helps also has automatic chip-removal system, cooling, centralized lubrication and protective cover.Described main axle unit band tool-broaching mechanism, under the cooperation of cutter-exchange mechanism and tool magazine, can realize fast automatic tool changing.Main shaft adopts alternating current servo spindle motor tooth-adding profile band deceleration transmission, and stable drive, slewing range is wide, and transmitting torque is large.After workpiece clamped one time, automatically can complete the Continuous maching of boring, milling, brill, strand multiple operation.

Description

Vertical numerical control double end double-pole storehouse, gantry milling machine machining center
Technical field
The utility model belongs to machine-building equipment technology field, relate to a kind of machining chip lathe, particularly relate to a kind of vertical numerical control double end double-pole storehouse, gantry milling machine machining center of the large and medium-sized part Roughing and fine machining be applicable in automobile, metallurgy, wind-powered electricity generation, boats and ships, coal mine machinery, engineering machinery.
Background technology
At present, planer-type boring and milling lathe be integrate mechanical, electrical, the machining equipment of the advanced technology such as liquid, be applicable to industry semifinishing and the fine finishining such as heavy-duty machine, locomotive, generating, lathe, automobile, mould, also can be used for roughing.Analyzing examples, planer-type boring and milling lathe general structure is made up of a portal frame, portal frame forms rigid frame by two column, moved cross beam, tie-beam, transverse slide carriage and milling head ram, crossbeam configures a multi-functional ram type vertical up-or-down movement (Z axis) of vertical type high-power mostly, vertical spindle boring and milling cutter head, the slide carriage of boring and milling cutter head is along beam guideway side-to-side movement (Y-axis); Along lathe bed table longitudinal movement (X-axis) below gantry frame.But manufacture the demand in field according to state key industry core, this type of device target should be control specific machine and flexible manufacturing system thereof, current a lot of existing equipment cannot be applicable to the needs of the continuity processing of the large and medium-sized part of every profession and trade.Therefore, for above aspect, need to carry out rational improvement and bring new ideas lifting to prior art, make it to become gantry vertical knee-type milling machine machining center with two main shaft double-pole storehouse.
Utility model content
For the above defect of prior art, the utility model proposes a kind of rationally distributed, complete machine rigidity is strong, bearing capacity is large, positioning precision is high, running noise is little, can adapt to diversified Continuous maching produce vertical numerical control double end double-pole storehouse, gantry milling machine machining center, with solve prior art equipment many deficiencies.
For achieving the above object, the utility model is by the following technical solutions:
A kind of vertical numerical control double end double-pole storehouse, gantry milling machine machining center, comprise gantry unit of the main slide unit unit of X-axis and gantry beam both sides, it is characterized in that: the stage body of the main slide unit 13 of described X-axis is provided with work piece platform 31 and magnechuck and/or clamping device 33, gantry unit is made up of two columns and the two-way cross nc sliding table of crossbeam, two-way cross nc sliding table is equipped with at gantry beam 27 left and right sides, two-way cross nc sliding table comprises the traversing Y-axis slide unit 23 of left traversing Y-axis slide unit 26 and the right side, two-way cross nc sliding table respectively fills a vertical special right spindle motor milling head 22 and left spindle motor milling head 25, in order to realize the Milling Process to workpiece, in the outside of two stand column and beam, disc type tool magazine 3 is housed respectively, right spindle motor milling head 22 and left spindle motor milling head 25 are controlled by digital control system 12, specular Milling Process while of realizing bilateral to the curved surface symmetrical expression of complex part, the main shaft band tool-broaching mechanism of described right spindle motor milling head 22 and left spindle motor milling head 25,
The side of right traversing Y-axis slide unit, left traversing Y-axis slide unit arranges Z axis slide unit respectively, and described Z axis slide unit is respectively right Z axis slide unit, left Z axis slide unit;
Also comprise knife striking cylinder 21, cutter-exchange mechanism 25, knife striking cylinder 21 is arranged on the top of right spindle motor milling head 22, cutter-exchange mechanism is arranged on the bottom of two heel posts, wherein knife striking cylinder 21, cutter-exchange mechanism and circular tool magazine 3 is controlled by digital control system 12, carry out automatic tool changer, realize quick-replaceable cutter Continuous maching.
Preferably, between described base 2 with the main slide unit of X-axis 13, between crossbeam with the right side traversing Y-axis slide unit 23 and right traversing Y-axis slide unit 23 be connected with all adopting guide rail mode between Z axis slide unit.
Preferably, the width of base is provided with two line slideways, described guide rail is heavily loaded rolling linear guide, is connected between described base 2 and the main slide unit 13 of X-axis by load-carrying rolling line slideway; The syndeton of the hard rail that slides is adopted between described gantry beam 27 and the right side traversing Y-axis slide unit 23; The rail plate auxiliary structure of laminating form is adopted to connect between the described right side traversing Y-axis slide unit slide unit 23 and Z axis slide unit.
Preferably, the main slide unit of described X-axis 13 is all connected with corresponding ball screw assembly, with Z axis servomotor 9 by X-axis servomotor 10, Y-axis servomotor 26 with the driving of two-way cross nc sliding table.
Preferably, the guide rail of the main slide unit of described X-axis 13 is provided with the main protective cover 46 of X-axis, and described protective cover is the totally-enclosed extension-type shelter of stainless steel.
Other auxiliary unit also has automatic chip-removal system, cooling fluid, centralized lubrication and slide unit rail protective cover.Design has the vertical duplex head milling machine machining center in gantry of high-efficiency multi-function type band main shaft automatic tool-broaching and double-pole storehouse automatic tool changer.
Have X-axis, Y-axis according to vertical numerical control double end double-pole storehouse, gantry of the present utility model milling machine machining center, the basic rectilinear coordinates axle of Z axis three, each reference axis all can Digital Control be located automatically.After workpiece clamped one time, automatically the Continuous maching of the multiple operation such as boring, milling, brill, strand can be completed, can also according to user need to be equipped with suitable annex right-angle milling head, universal milling head, etc. the annex milling head of multiple special shape, be equipped with double-pole storehouse, to realize the string milling fine finishining of the symmetrical working procedures of polyhedral double end synchronous mirror.
Described machine tool chief axis is equipped with two special vertical main shaft milling cutter heads, and adopt Taiwan to produce main axle unit formula structure, good rigidly, rotating speed is high.The main shaft band tool-broaching mechanism of described vertical spindle milling cutter head, under the cooperation of knife striking cylinder and circular tool magazine, can realize fast automatic tool changing by hydraulic system, cutter-exchange mechanism, its compact conformation, tool magazine capacity is 8 or 16 and cutter is controlled by digital control system, easy to use.Described spindle motor adopts AC servo motor to add band odontoid belt reduction gearing mechanism by AC converter drive motors, and stable drive, slewing range is wide, and transmitting torque is larger.Described special-purpose milling cutter head main axle unit, cutter head BT50 tapering; Servo principal axis power of motor 15KW; Range of spindle speeds 150 ~ 6000r/min stepless speed regulation.
According to gantry of the present utility model vertical numerical control two main shaft double-pole storehouses milling machine machining center, also there is following additional technical feature:
Preferably, adopt the structure of heavily loaded linear rolling track between described base and the main slide unit of lathe X-axis, bearing capacity is large, and cut antivibration, coefficient of friction is little, and servo-drive performance is excellent, and vibrate little during fast feed, stability is high, without the feature of creeping during low speed feeding; The main slide unit of described X-axis adopts ball-screw auxiliary driving, and compact conformation, stable drive, positioning precision is high.
Preferably, between described machine tool beam and the right side traversing Y-axis slide unit guide rail, adopt hard rail, with inclined-plane insert adjustment ram gap.Its main feature is, good rigidly, and bearing capacity is large, and cut antivibration, vibrate little during fast feed, stability is high, without creeping during low speed feeding; Right traversing Y-axis slide unit adopts ball-screw auxiliary driving, and compact conformation, stable drive, positioning precision is high.
Preferably, described machine tool sliding table base, slide unit stage body, column, crossbeam, special-purpose milling cutter head main box and fixed cross beam, adopt high-strength cast iron material and resin sand cast, rational reinforcing plate structure is adopted to design, and the technique of double tempering after adopting roughing, ensure high rigidity and the high stability of lathe entirety.
Preferably, method one: the described main slide unit of lathe X-axis is provided with work piece platform and also comprises jig, it is the key link ensureing workpiece correct location on lathe.According to processing work features of shape, adopt two self-centering mechanisms center line location and oil cylinder pushing workpiece axial location, make the position that workpiece keeps correct on lathe all the time.
Preferably, method two: described jig adopts magnechuck as the instrument of clamping work pieces, and its holding area is large, clamps solid and reliable, to improve cutting speed.Fixture is also provided with zero reference point, and cutter can small change position easily, makes the position that cutter and workpiece keep correct on lathe all the time, to ensure its crudy of complex part.
Preferably, the ball-screw of each guide rail of described lathe is silver-colored brand, and all with fixing lubricating system, each lubricating system adopts Nanjing Bei Qier centralized lubrication pump, regularly, quantitatively, self-lubricate.
Preferably, the protection of telescopic stainless steel protective cover all installed by described lathe X-axis main slide unit guide rail and right traversing Y-axis slide unit guide rail, and good looking appearance is durable in use.
Preferably, described digital control system operation screen adopts Siemens 840D dual channel system to control, and can realize the Surface Milling processing simultaneously of two milling cutter head very easily, namely the while of double milling heads, symmetry walks difference benefit, symmetrical tool changing simultaneously, can ensure crudy, significantly improve working (machining) efficiency again; It controls accurately, and stable performance is easy to operate, and band Manual pulse generator, conveniently manually adjusts, and programmable instructions motion process controls again.
The utility model compared with prior art has following useful technique effect:
Digital control system of the present utility model adopts Siemens 840 D in NC or adopts Central China HNC-21MD milling digital control system, and programming is simple, and manipulation is convenient, can meet the instructions for use of machining center to the quick Continuous maching of complex part.
Further, of the present utility model pair of main shaft milling head and double-pole storehouse automatic tool changer function, mirror image machining while that the curved surface symmetrical expression of applicable complex part being bilateral, work efficiency more than 2 times is improved compared with single main shaft, after workpiece clamped one time, automatically can complete the Continuous maching of the multiple operation such as boring, milling, brill, strand.
Accompanying drawing illustrates:
With reference to the accompanying drawings embodiment of the present utility model is described in further detail below.
Fig. 1 is machining center agent structure front view of the present utility model;
Fig. 2 is machining center agent structure side view of the present utility model;
Fig. 3 is machining center agent structure top view of the present utility model;
In Fig. 1: gantry right column 1, chip removal system 11, the main slide unit 13 of X-axis, gantry right column 17, cable hanger 21, right spindle motor milling head 22, right traversing Y-axis slide unit 23, dress bits dolly 24, left spindle motor milling head 25, left traversing Y-axis slide unit 26, gantry beam 27, left side tool magazine 28, right side tool magazine 29, right side milling cutter 30, work piece platform 31, left side milling cutter 32, clamping device 33, right side cutter-exchange mechanism 34, left side cutter-exchange mechanism 35, put cutter position 36, connect knife bar 37, lifting cutter lifting cylinder 38, cutter head location place 39, left Z axis slide unit 40, right Z axis slide unit 41,
In Fig. 2: gantry right column 1, lathe bed base 2, circular tool magazine 3, milling head 4, hydraulically operated fixture 5, centralized lubrication 6, guard rail 7, horizontal Y-axis ball-screw 8, Z axis servomotor 9, X spindle servo electric machine 10, chip removal system 11, digital control system handle screen 12, the main slide unit 13 of X-axis, chip removal motor 14, main shaft tool change position 15, upper slitter cylinder executing agency 16,
In Fig. 3: Hydraulic Station 42, tool changing revolution space 43, tool changing revolution space 44, X-axis main platform workpiece 45, the main protective cover of X-axis 46, left channel of chip removal 47, right channel of chip removal 48, electrical control cubicles 49,
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Shown in Fig. 1, Fig. 2, Fig. 3, the utility model gantry vertical numerical control two main shaft double-pole storehouses milling machine machining center, comprise lathe bed base 2, gantry unit of the main slide unit unit of X-axis and gantry beam 27 and both sides, the both sides of described lathe bed base 2 are provided with gantry left column 17 and gantry right column 1, gantry beam 27 is provided with above described gantry left column 17 and gantry right column 1, described gantry beam 27 is provided with two-way cross nc sliding table, comprises the traversing Y-axis slide unit 23 of left traversing Y-axis slide unit 26 and the right side.The right spindle motor milling head 22 and left spindle motor milling head 25 that move up and down is respectively equipped with above the described right side traversing Y-axis slide unit, left traversing Y-axis slide unit.
Left side milling cutter 32 is installed in the lower end of described left spindle motor milling head 25, right side milling cutter 30 is installed in the lower end of described right spindle motor milling head 22.Described spindle motor milling head is that inside side is arranged, namely spindle motor is placed in outside, and special main shaft end mill head is fixed on inner side, and knife striking cylinder 21 is contained in the top of main shaft end mill head 22.
Lay above the main slide unit 13 of described X-axis and be fixed with work piece platform 31, workpiece is fixed by clamping device 33, comprises magnetic fixture or hydraulically operated fixture.
Described gantry beam both end sides is respectively equipped with circular tool magazine 3, and tool magazine capacity is that 8 cuttves or maximum 16 are cutter.
Described right cutter-exchange mechanism 34 and left cutter-exchange mechanism 35 are contained in the bottom of two heel posts, and tool magazine RC below correspondence puts cutter position 36, connects knife bar 37 and is responsible for connecing cutter, and left cutter-exchange mechanism 38 is elevated, rotate 180 ° and circular tool magazine 3 has coordinated automatic tool changer.Cutter-exchange mechanism provides power by Hydraulic Station 42, necessarily requires left traversing Y-axis slide unit slide unit vertical with Z axis first to advance to cutter head location and locates on 39 positions.
Left side of the present utility model tool magazine automatic tool changer job step is as follows:
A is that the cutter head location first left side main shaft milling head 25 being reached automatically its tool change position is located on 39 positions, cutter is automatically brought on lower cutter 1# position vertically downward left side tool magazine 28 target bit N.
B cutter hub rotates 90 ° and makes handle of a knife upward then as put cutter position 36, knife striking cylinder 21 action above right main shaft, and bar of inside forging a knife is forged a knife, and meet N under a termination of knife bar 37 in tool magazine milling cutter by one, the other end connects down the cutter on left main shaft milling head 25.
Then left cutter-exchange mechanism 35 oil cylinder is descending puts in place for c, then connects knife bar 37 and rotates 180 °, just be have exchanged by milling cutter.
On the left of d, in cutter-exchange mechanism 35, new milling cutter shank, to rising, is loaded onto main shaft by oil cylinder, and old milling cutter is put back on cutter position 36, and tool magazine pawl rotates 90 ° and put among left tool magazine 28 by milling cutter.
Equally, right side tool magazine automatic tool changer job step works substantially identical with left side, omits at this, has been coordinated by right side cutter-exchange mechanism 34 and right side tool magazine 29, by oil cylinder execution work in Hydraulic Station 42, synchronously can complete the automatic tool changer of two main shaft milling head.
According to example of the present utility model, described machine tooling center also comprises lubricating system, magnetic automatic chip-removal system and coolant system.Described lathe adopts centralized lubrication device 6, selects Bei Qier lubrication station.
The automatic chip-removal system 11 that described lathe is provided with, automatic chip-removal system 11 is magnetic automatic chip-removal system, comprise: collected by the left channel of chip removal of auger 47 of X-axis main slide unit both sides, right channel of chip removal 48, chip removal motor 14 drives, a side of lathe is transported to again by conveyer chain band, concentrate chip removal, collected by dress bits dolly 24.Described cooling fluid reflux and filter Posterior circle uses, so that field management.
The heavy castings such as described lathe bed base 2, the main slide unit of X-axis 13, left traversing Y-axis slide unit 26 and gantry left column 17, gantry right column 1, gantry beam 27, planker, square ram all adopt high-strength cast iron material and resin sand cast, rational reinforcing plate structure is adopted to design, and secondary failure technique after adopting roughing, ensure the high rigidity of lathe entirety, high stability.
Between described lathe bed base 2 with the main slide unit of X-axis 13, between gantry beam 27 with a left side traversing Y-axis slide unit 26 and left traversing Y-axis slide unit 26 all adopt guide rail mode to be connected with between left Z axis slide unit 40, its connect positioning precision high, bearing capacity is large.
The main slide unit of described X-axis 13 adopts 45 heavily loaded linear rolling tracks, and X-axis stroke is 2100mm, servomotor and the direct-connected transmission of ball-screw, shaft coupling band overload protection; Slide unit mesa dimensions (long × wide) 2000 × 1000, slide unit is movement fast: 6000mm/min, slide unit work speed: 0 ~ 800mm/min.
The traversing Y-axis slide unit 26 in a described left side drives it laterally to slide along Y direction by motor, and Y-axis infeed stroke is 700 ㎜; Be provided with left Z axis slide unit 40 above this slide unit, left Z axis slide unit 40 drives the upper and lower stroke of this Z axis slide unit to be 320 ㎜ by motor.
The traversing Y-axis slide unit 23 in the described right side drives it laterally to slide along Y direction by motor, and Y-axis infeed stroke is 700 ㎜; Be provided with left Z axis slide unit 41 above this slide unit, left Z axis slide unit 41 drives the upper and lower stroke of this Z axis slide unit to be 320 ㎜ by motor.
Described lathe adopts both sides on gantry beam 27 that two-way cross nc sliding table is all housed, and makes vertical special left spindle motor milling head 25, right left spindle motor milling head 22, on two-way cross nc sliding table, does horizontal direction (Y-axis) feed of upper and lower vertical direction (Z axis) left and right; Both X-axis that seesaws of the main workbench of lathe realize walking by the main slide unit 13 of the X-axis above lathe bed base 2, and above each motor is energy servomotor, drives ball-screw speed governing machining control.
Described machine tool hydraulic system is made up of Hydraulic Station 42, is mainly used in the right automatic tool changer of main shaft milling head 22 and the clamping of workpiece, and broaching tool oil cylinder 21 is directly over right spindle motor milling head 22, and right cutter-exchange mechanism 34 is immediately below gantry right column 1.The clamping of workpiece has been realized by the clamping cylinder of clamping device 33.Described machining center electric control system is made up of electrical control cubicles 49.
The above, be only the utility model embodiment, therefore the scope of the utility model enforcement can not be limited with this, namely the equivalence change done according to the restriction of the utility model claim and description and claims with modify, all should still belong in scope that the utility model contains.

Claims (6)

1. vertical numerical control double end double-pole storehouse, gantry milling machine machining center, comprise gantry unit of the main slide unit unit of X-axis and gantry beam both sides, it is characterized in that: the stage body of the main slide unit of described X-axis (13) is provided with work piece platform (31) and magnechuck and/or clamping device (33), gantry unit is made up of two columns and the two-way cross nc sliding table of crossbeam, two-way cross nc sliding table is equipped with at gantry beam (27) left and right sides, two-way cross nc sliding table comprises the traversing Y-axis slide unit (23) of left traversing Y-axis slide unit (26) and the right side, two-way cross nc sliding table respectively fills a vertical special right spindle motor milling head (22) and left spindle motor milling head (25), in order to realize the Milling Process to workpiece, in the outside of two stand column and beam, disc type tool magazine (3) is housed respectively, right spindle motor milling head (22) and left spindle motor milling head (25) are controlled by digital control system (12), specular Milling Process while of realizing bilateral to the curved surface symmetrical expression of complex part, the main shaft band tool-broaching mechanism of described right spindle motor milling head (22) and left spindle motor milling head (25),
The side of right traversing Y-axis slide unit, left traversing Y-axis slide unit arranges Z axis slide unit respectively, and described Z axis slide unit is respectively right Z axis slide unit, left Z axis slide unit;
Also comprise knife striking cylinder (21), cutter-exchange mechanism (25), knife striking cylinder 21 is arranged on the top of right spindle motor milling head (22), cutter-exchange mechanism is arranged on the bottom of two heel posts, wherein knife striking cylinder (21), cutter-exchange mechanism and circular tool magazine (3) are controlled by digital control system (12), carry out automatic tool changer, realize quick-replaceable cutter Continuous maching.
2. vertical numerical control double end double-pole storehouse, gantry according to claim 1 milling machine machining center, is characterized in that: between described base (2) with the main slide unit of X-axis (13), between crossbeam with the right side traversing Y-axis slide unit (23) and right traversing Y-axis slide unit (23) be connected with all adopting guide rail mode between Z axis slide unit.
3. vertical numerical control double end double-pole storehouse, gantry according to claim 2 milling machine machining center, it is characterized in that: on the width of base, be provided with two line slideways, described guide rail is heavily loaded rolling linear guide, is connected between described base (2) and the main slide unit of X-axis (13) by load-carrying rolling line slideway; The syndeton of the hard rail that slides is adopted between described gantry beam (27) and the right side traversing Y-axis slide unit (23); The rail plate auxiliary structure of laminating form is adopted to connect between the described right side traversing Y-axis slide unit slide unit (23) and Z axis slide unit.
4. vertical numerical control double end double-pole storehouse, gantry according to claim 3 milling machine machining center, is characterized in that: the main slide unit of described X-axis (13) is all connected with corresponding ball screw assembly, with Z axis servomotor (9) by X-axis servomotor (10), Y-axis servomotor (26) with the driving of two-way cross nc sliding table.
5. vertical numerical control double end double-pole storehouse, gantry according to claim 2 milling machine machining center, it is characterized in that: the guide rail of the main slide unit of described X-axis (13) is provided with the main protective cover of X-axis (46), described protective cover is the totally-enclosed extension-type shelter of stainless steel.
6. vertical numerical control double end double-pole storehouse, gantry according to claim 1 milling machine machining center, it is characterized in that: also comprise auxiliary unit, described auxiliary unit comprises automatic chip-removal system (11), cooling fluid, centralized lubrication (6), wherein automatic chip-removal system (11) is made up of left and right sides channel of chip removal (48) and is carried by conveyer chain band, concentrate chip removal, collected by dress bits dolly (24).
CN201520759164.2U 2015-09-28 2015-09-28 Vertical numerical control double end double-pole storehouse, gantry milling machine machining center Withdrawn - After Issue CN204934695U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105171074A (en) * 2015-09-28 2015-12-23 西安宝钢钢材加工配送有限公司 Gantry vertical numerical control milling machine machining center with double heads and double tool changers
CN109434164A (en) * 2019-01-14 2019-03-08 香农工业设备制造南京有限公司 A kind of high efficiency milling sample machine
CN113385950A (en) * 2021-07-01 2021-09-14 南通纳侬精密机械有限公司 Novel full-automatic intelligent machining production line

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105171074A (en) * 2015-09-28 2015-12-23 西安宝钢钢材加工配送有限公司 Gantry vertical numerical control milling machine machining center with double heads and double tool changers
CN105171074B (en) * 2015-09-28 2018-04-03 西安宝钢钢材加工配送有限公司 Gantry vertical numerical control double end double-pole storehouse milling machine machining center
CN109434164A (en) * 2019-01-14 2019-03-08 香农工业设备制造南京有限公司 A kind of high efficiency milling sample machine
CN113385950A (en) * 2021-07-01 2021-09-14 南通纳侬精密机械有限公司 Novel full-automatic intelligent machining production line

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Granted publication date: 20160106

Effective date of abandoning: 20180403