CN114833640A - Multi-spindle electromechanical type spindle base milling and drilling composite processing machine - Google Patents
Multi-spindle electromechanical type spindle base milling and drilling composite processing machine Download PDFInfo
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- CN114833640A CN114833640A CN202210373360.0A CN202210373360A CN114833640A CN 114833640 A CN114833640 A CN 114833640A CN 202210373360 A CN202210373360 A CN 202210373360A CN 114833640 A CN114833640 A CN 114833640A
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- spindle
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- distance adjusting
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- composite processing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a multi-spindle electromechanical type wheelbase milling and drilling composite processing machine which comprises a machine tool spindle box, wherein an angle rotating mechanism is installed in the machine tool spindle box, an angle spindle of the angle rotating mechanism penetrates through the spindle box and is downwards fixed to the upper end of a spindle connecting seat, the lower end of the spindle connecting seat is fixed to the upper end of a spindle disc shell in a threaded manner, the lower end of the spindle disc shell is fixedly installed at the upper end of a spindle disc through a plurality of inner hexagon bolts, an installation hole is formed in the middle of the upper portion of the spindle disc, a plurality of adjusting grooves are radially formed in the middle of the inner wall of the installation hole, distance adjusting plates are installed in the plurality of adjusting grooves, a rotary telescopic motor is embedded in the spindle connecting seat and installed, a driving end of the rotary telescopic motor is downwards connected with an adjusting spindle, a pushing shaft is fixedly installed at the lower end of the adjusting spindle, and a spindle system is installed above one end, which is located on the outer side of the spindle disc, of the distance adjusting plates; the invention can realize the quick adjustment of the wheelbase of the main shaft, improve the operation efficiency of the equipment to meet the production requirement and improve the production efficiency of composite processing.
Description
Technical Field
The invention belongs to the field of machining equipment, and particularly relates to a multi-spindle electromechanical type wheelbase milling and drilling composite processing machine.
Background
A compound machine tool is a machine tool that can complete machining of a plurality of elements from a blank to a finished product on one main machine or as many as possible. The compound machine tool is generally a numerical control machine tool or a machining center, namely a compound numerical control machine tool or a compound machining center; compound machine tools are the trend of the development of machine tool technology in the world at present. In the general development trend of maintaining process concentration and eliminating (or reducing) workpiece reinstallation and positioning, more different machining processes are combined on one machine tool, so that the aims of reducing machine tools and fixtures, avoiding inter-process transportation and storage, improving workpiece machining precision, shortening machining period and saving operation area are fulfilled.
Patent application No. CN201911085318.3, the contents of which are: the invention belongs to the technical field of machining, and particularly relates to an electromechanical full-automatic multi-spindle milling and drilling combined machining machine tool with an adjustable wheelbase. The technical scheme is as follows: the control driving system 21 controls and drives the main motor 1, the lifting motor 31, the distance adjusting motor 10 and the electric spindle 14 to move, the electromagnetic brake 7 to open and close, the electromagnet to open and close and the electromagnet to open and close 19, the transverse feeding worktable 27, the longitudinal feeding worktable and the machine tool lifting platform 25 according to the input instructions through the data driving wire 22, not only can efficiently mill the workpiece, but also can drill hole groups formed by a plurality of holes simultaneously, can realize the automatic adjustment of the turning radius, can realize a plurality of milling and drilling modes, and can realize the full-automatic intelligent conversion of each mode. The problems of torque increase, cutting force increase, cutting heat increase, cutter durability reduction, chatter and impact in the cutting process are effectively solved.
Although the adjustment of the spindle base of the cutter spindle is realized through the distance adjusting conical block, the adjustment speed is low, the requirement of batch production cannot be better matched, and the multiple spindles can be adjusted in place simultaneously and quickly.
Disclosure of Invention
Aiming at the technical problems caused by the background, the technical scheme adopted by the invention is as follows:
a multi-spindle electromechanical type spindle distance milling and drilling combined processing machine comprises a machine tool spindle box, wherein an angle rotating mechanism is installed in the machine tool spindle box, an angle spindle of the angle rotating mechanism penetrates through the spindle box and is downwards fixed to the upper end of a spindle connecting seat, the lower end of the spindle connecting seat is fixed to the upper end of a spindle disc shell in a threaded mode, the lower end of the spindle disc shell is fixedly installed at the upper end of the spindle disc through a plurality of inner hexagonal bolts, an installation hole is formed in the middle of the upper portion of the spindle disc, a plurality of adjusting grooves are radially formed in the middle of the inner wall of the installation hole and penetrate through the middle section of the outer side of the spindle disc, distance adjusting plates are installed in the plurality of adjusting grooves, reset springs are directly installed in the plurality of distance adjusting plates and the plurality of adjusting grooves, the end faces, located in the installation hole, of the plurality of distance adjusting plates are arranged to be inclined planes, and a rotary telescopic motor is installed in the spindle connecting seat in an embedded mode, the utility model discloses a distance regulating plate, including main shaft dish, rotatory flexible motor, regulation main shaft lower extreme fixed mounting has the promotion axle, it is little, the big conical shaft in upper end to promote the axle, and is a plurality of the distance regulating plate is through promoting the outside extension of axle, and is a plurality of the distance regulating plate is located main shaft dish outside one end top and all installs main shaft system, and is a plurality of the cutter is installed to main shaft system lower extreme.
Preferably, the spindle disc is a stepped cylindrical disc, the outer diameter of the upper portion of the spindle disc is smaller than the length of the distance adjusting plate, and the outer diameter of the lower portion of the spindle disc is larger than the length of the distance adjusting plate.
Preferably, the surface of the large-diameter disc at the lower part of the spindle disc is radially provided with a plurality of long waist grooves, and a plurality of spindle systems are matched with the distance adjusting plates to move in a reciprocating manner along the radial direction in the long waist grooves through spacer rings.
Preferably, the sections of the long waist grooves are I-shaped grooves, and the spacer rings are matched with the long waist grooves to form I-shaped rings.
Preferably, the angle rotating mechanism is an angle adjusting mechanism in which a gear system is driven by a servo motor to drive the index plate.
The preferred, the mounting hole is the big inversion T shape hole of first half diameter is little, the lower half diameter, the downthehole fixed mounting of major diameter of mounting hole has the baffle, it has the hole of stepping down to open in the baffle, the diameter in the hole of stepping down is the same with the minor diameter hole diameter of mounting hole, the baffle is fixed in a plurality of distance adjusting plate belows.
Preferably, the plurality of spindle systems comprise a micro motor, a machining spindle and a tool bit, the micro motor is fixed on the distance adjusting plate, the driving end of the micro motor faces downwards, the lower end of the machining spindle penetrates through the distance adjusting plate and the spacer ring to be connected to the tool bit, and the tool is clamped on the tool bit.
Preferably, the side surface of the main shaft connecting seat is provided with a plurality of ventilation holes.
Preferably, a plurality of the adjusting grooves are arranged in an annular array, and a plurality of the distance adjusting plates and the long waist grooves are matched in an annular array.
By adopting the technical scheme of the invention, the following beneficial effects are obtained: the synchronous axial distance adjusting device has a simple operation principle, realizes synchronous axial distance adjustment of a plurality of main shaft systems by utilizing the up-and-down rotation pushing and retracting of the conical pushing shaft and the supporting and resetting of the distance adjusting plate by matching with the reset spring so as to meet the requirement of quick adjustment when the central positioning is changed during processing, has a simple and obtained structure, reduces the manufacturing cost of equipment, is convenient to disassemble and maintain the main shaft disc by arranging the baffle plate at the lower end, and prolongs the service life of the distance adjusting plate; meanwhile, the index plate which is arranged in the spindle box and rotates by the servo motor is used for adjusting the integral rotation angle of the spindle plate, so that the tool can be matched and set according to the installation position of a spindle system tool during machining, and the adjustment efficiency and the automation level of equipment during machining are improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of an embodiment of the present invention illustrating an increased distance between the spindles;
FIG. 3 is a schematic view of a reduced axial distance spindle according to an embodiment of the present invention;
FIG. 4 is a top view of a spindle disk and spindle system in an embodiment of the present invention;
FIG. 5 is a partial cross-sectional view of a long kidney slot in an embodiment of the present invention;
the embodiment of the invention mainly comprises the following component symbols:
the device comprises a spindle box-1, an angle rotating mechanism-2, a servo motor-21, an index plate-22, an angle spindle-23, a spindle connecting seat-3, a vent-31, a spindle plate shell-4, a spindle plate-5, a mounting hole-51, an adjusting groove-52, a long-waist groove-53, a rotary telescopic motor-6, an adjusting spindle-61, a pushing shaft-62, a distance adjusting plate-7, a reset spring-71, a spindle system-8, a micro motor-81, a machining spindle-82, a tool bit-83, a tool-84, a spacer ring-9 and a baffle-10.
Detailed Description
In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 to 3, a multi-spindle electromechanical spindle base milling and drilling composite processing machine comprises a machine tool spindle box 1, wherein an angle rotating mechanism 2 is installed in the machine tool spindle box 1, an angle spindle 23 of the angle rotating mechanism 2 penetrates through the spindle box 1 and is downwards fixed to the upper end of a spindle connecting seat 3, the lower end of the spindle connecting seat 3 is fixed to the upper end of a spindle disc shell 4 in a threaded manner, the lower end of the spindle disc shell 4 is fixedly installed at the upper end of a spindle disc 5 through a plurality of hexagon socket head bolts, an installation hole 51 is formed in the middle of the upper portion of the spindle disc 5, a plurality of adjusting grooves 52 are radially formed in the middle of the inner wall of the installation hole 51 and penetrate through the middle section of the outer side of the spindle disc 5, distance adjusting plates 7 are installed in the plurality of adjusting grooves 52, reset springs 71 are directly installed in the plurality of distance adjusting plates 7 and the plurality of adjusting grooves 52, end faces, located in the installation hole 51, of the plurality of distance adjusting plates 7 are arranged as inclined planes, embedding installs rotatory flexible motor 6 in spindle connecting seat 3, the drive end of rotatory flexible motor 6 is connected with regulation main shaft 61 down, it has promotion axle 62 to adjust main shaft 61 lower extreme fixed mounting, it is little, the big conical shaft in upper end for the lower extreme to promote axle 62, and is a plurality of distance adjusting plate 7 is through promoting the outside extension of axle 62, and is a plurality of distance adjusting plate 7 is located 5 outside one end tops of main shaft dish and all installs spindle system 8, and is a plurality of cutter 84 is installed to the 8 lower extremes of spindle system.
The invention has simple operation principle, realizes the synchronous wheelbase adjustment of a plurality of main shaft systems 8 by utilizing the up-and-down rotating push and retraction of the conical push shaft 62 and the support and reset of the return spring 71 to the distance adjusting plate 7 to meet the requirement of quick adjustment when the central positioning is changed during processing, has simple and obtained structure, reduces the manufacturing cost of equipment, is provided with the baffle plate 10 at the lower end, is convenient to disassemble and maintain the main shaft disc 5 and prolongs the service life of the distance adjusting plate 7.
The main shaft disc 5 is a stepped cylindrical disc, the outer diameter of the upper portion of the main shaft disc 5 is smaller than the length of the distance adjusting plate 7, and the outer diameter of the lower portion of the main shaft disc 5 is larger than the length of the distance adjusting plate 7.
As shown in fig. 5, a plurality of long waist grooves 53 are radially formed on the surface of the large-diameter disc at the lower part of the spindle disc 5, and a plurality of spindle systems 8 are matched with the distance adjusting plates 7 through the spacer rings 9 and move in a reciprocating manner along the radial direction in the long waist grooves 53; the section of the long waist groove 53 is an I-shaped groove, and the spacer ring 9 is matched with the long waist groove 53 to form an I-shaped ring.
The I-shaped long waist groove 53 is matched with the I-shaped spacer ring 9, so that the radial movement adjustment of the distance adjusting plate 7 can be realized, the processing stability and the supporting limit on the main shaft disc 5 in the height direction can be kept by matching with the main shaft system 8, and the stability and the processing precision of the main shaft are improved.
The angle rotating mechanism 2 is an angle adjusting mechanism in which a gear system is driven by a servo motor 21 to drive a dividing disc 22, the dividing disc 22 rotated by the servo motor 21 is arranged in the spindle box 1 to adjust the whole rotating angle of the spindle disc 5, the tool setting in machining is guaranteed to be matched according to the installation position of a tool 84 of the spindle system 8, and the adjusting efficiency and the automation level of equipment in machining are improved.
The mounting hole 51 is the inversion T shape hole that first half diameter is little, the diameter of lower half is big, the downthehole fixed mounting of major diameter of mounting hole 51 has baffle 10, it has the hole of stepping down to open in baffle 10, the diameter in the hole of stepping down is the same with the minor diameter hole diameter of mounting hole 51, baffle 10 is fixed in a plurality of distance adjusting plate 7 below.
The spindle systems 8 respectively comprise a micro motor 81, a machining spindle 82 and a tool bit 83, the micro motor 81 is fixed on the distance adjusting plate 7, the driving end of the micro motor 81 faces downwards, the lower end of the machining spindle 82 penetrates through the distance adjusting plate 7 and the spacer ring 9 to be connected onto the tool bit 83, the tools 84 are clamped on the tool bit 83, the specific number and types of the tools 84 can be determined and replaced according to actual machining needs, and the machining flexibility of the equipment is kept.
The side of the main shaft connecting seat 3 is provided with a plurality of ventilation holes 31 for radiating the rotary telescopic motor 6, so that the embedded rotary telescopic motor 6 is prevented from being burnt due to overhigh temperature during operation.
As shown in fig. 4, a plurality of the adjustment grooves 52 are arranged in an annular array, and a plurality of the distance adjustment plates 7 and the long waist grooves 53 are arranged in an annular array in a matching manner.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a many main shafts electromechanical type wheel base mills and bores combined machining machine, includes the lathe headstock, its characterized in that: an angle rotating mechanism is installed in a spindle box of the machine tool, an angle spindle of the angle rotating mechanism penetrates through the spindle box and is downwards fixed to the upper end of a spindle connecting seat, the lower end of the spindle connecting seat is fixed to the upper end of a spindle disc shell in a threaded mode, the lower end of the spindle disc shell is fixedly installed at the upper end of the spindle disc through a plurality of inner hexagon bolts, a mounting hole is formed in the middle of the upper portion of the spindle disc, a plurality of adjusting grooves are radially formed in the middle of the inner wall of the mounting hole and penetrate through the middle section of the outer side of the spindle disc, distance adjusting plates are installed in the adjusting grooves, reset springs are directly installed in the distance adjusting plates and the adjusting grooves, the end faces, located in the mounting hole, of the distance adjusting plates are arranged to be inclined planes, a rotary telescopic motor is installed in the spindle connecting seat in an embedded mode, and the driving end of the rotary telescopic motor is downwards connected with an adjusting spindle, adjust main shaft lower extreme fixed mounting and have the promotion axle, it is little, the big conical shaft in upper end, a plurality of to promote the axle the outside extension of distance adjusting plate through promoting the axle, it is a plurality of the main shaft system is all installed to distance adjusting plate position in main shaft dish outside one end top, and is a plurality of the cutter is installed to main shaft system lower extreme.
2. The multi-spindle electromechanical wheelbase milling and drilling composite processing machine of claim 1, wherein: the main shaft disc is a stepped cylindrical disc, the outer diameter of the upper portion of the main shaft disc is smaller than the length of the distance adjusting plate, and the outer diameter of the lower portion of the main shaft disc is larger than the length of the distance adjusting plate.
3. The multi-spindle electromechanical wheelbase milling and drilling composite processing machine of claim 2, wherein: a plurality of long waist grooves are radially formed in the surface of the large-diameter disc at the lower portion of the spindle disc, and a plurality of spindle systems are matched with the distance adjusting plates to move in a reciprocating mode along the radial direction in the long waist grooves through spacing rings.
4. The multi-spindle electromechanical wheelbase milling and drilling composite processing machine of claim 3, wherein: the section of the long waist groove is an I-shaped groove, and the spacer ring is matched with the long waist groove to form an I-shaped ring.
5. The multi-spindle electromechanical wheelbase milling and drilling composite processing machine of claim 4, wherein: the angle rotating mechanism is an angle adjusting mechanism for driving the gear system to drive the dividing plate by the servo motor.
6. The multi-spindle electromechanical wheelbase milling and drilling composite processing machine of claim 5, wherein: the mounting hole is the inversion T shape hole that first half diameter is little, the lower half diameter is big, the downthehole fixed mounting of major diameter of mounting hole has the baffle, it has the hole of stepping down to open in the baffle, the diameter in the hole of stepping down is the same with the minor diameter hole diameter of mounting hole, the baffle is fixed in a plurality of distance adjusting plate belows.
7. The multi-spindle electromechanical wheelbase milling and drilling composite processing machine of claim 6, wherein: the spindle systems comprise micro motors, machining spindles and tool bits, the micro motors are fixed on the distance adjusting plates, the driving ends of the micro motors face downwards, the lower ends of the machining spindles penetrate through the distance adjusting plates and the space rings to be connected to the tool bits, and the tool bits are clamped on the tool bits.
8. The multi-spindle electromechanical wheelbase milling and drilling composite processing machine of claim 7, wherein: the side surface of the main shaft connecting seat is provided with a plurality of ventilation holes.
9. The multi-spindle electromechanical wheelbase milling and drilling composite processing machine of claim 8, wherein: a plurality of the adjustment tank is the annular array setting, and is a plurality of distance adjusting plate and long waist groove cooperate and set up for the annular array.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210373360.0A CN114833640B (en) | 2022-04-11 | 2022-04-11 | Multi-spindle electromechanical wheelbase milling and drilling combined machining machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210373360.0A CN114833640B (en) | 2022-04-11 | 2022-04-11 | Multi-spindle electromechanical wheelbase milling and drilling combined machining machine |
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| CN114833640A true CN114833640A (en) | 2022-08-02 |
| CN114833640B CN114833640B (en) | 2023-04-25 |
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Citations (9)
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|---|---|---|---|---|
| JPH0740048U (en) * | 1993-12-28 | 1995-07-18 | 日立精機株式会社 | Opposed spindle type machine tool |
| DE19826507A1 (en) * | 1998-06-15 | 1999-12-16 | Wilfried Taubner | Flexible finishing module for processing workpieces |
| CN102101183A (en) * | 2009-12-16 | 2011-06-22 | 林如华 | Multi-axis drilling machine with adjustable interval |
| CN102699773A (en) * | 2012-05-30 | 2012-10-03 | 广东工业大学 | Multifunctional miniature machine tool |
| CN105537949A (en) * | 2015-12-29 | 2016-05-04 | 宁波金凯机床制造有限公司 | Drilling and milling combined machine tool |
| CN108406318A (en) * | 2018-04-13 | 2018-08-17 | 浙江博威汽车空调有限公司 | A kind of drilling-milling apparatus for multi-step cavity machine-shaping in valve body |
| CN110814756A (en) * | 2019-11-08 | 2020-02-21 | 唐山学院 | Multi-spindle adjustable wheelbase milling and drilling combined machining center |
| CN110814757A (en) * | 2019-11-08 | 2020-02-21 | 唐山学院 | Multi-spindle electromechanical full-automatic adjustable-wheelbase milling and drilling combined machining machine tool |
| CN212311391U (en) * | 2020-04-10 | 2021-01-08 | 普锐米勒机床(东莞)有限公司 | Multi-spindle adjustable wheelbase milling and drilling combined machining center |
-
2022
- 2022-04-11 CN CN202210373360.0A patent/CN114833640B/en active Active
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| JPH0740048U (en) * | 1993-12-28 | 1995-07-18 | 日立精機株式会社 | Opposed spindle type machine tool |
| DE19826507A1 (en) * | 1998-06-15 | 1999-12-16 | Wilfried Taubner | Flexible finishing module for processing workpieces |
| CN102101183A (en) * | 2009-12-16 | 2011-06-22 | 林如华 | Multi-axis drilling machine with adjustable interval |
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| CN110814756A (en) * | 2019-11-08 | 2020-02-21 | 唐山学院 | Multi-spindle adjustable wheelbase milling and drilling combined machining center |
| CN110814757A (en) * | 2019-11-08 | 2020-02-21 | 唐山学院 | Multi-spindle electromechanical full-automatic adjustable-wheelbase milling and drilling combined machining machine tool |
| CN212311391U (en) * | 2020-04-10 | 2021-01-08 | 普锐米勒机床(东莞)有限公司 | Multi-spindle adjustable wheelbase milling and drilling combined machining center |
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