CN205414465U - Two fixed position rotation are bloated, and vertical numerically -controlled machine tool is made up in compact form drilling - Google Patents

Two fixed position rotation are bloated, and vertical numerically -controlled machine tool is made up in compact form drilling Download PDF

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Publication number
CN205414465U
CN205414465U CN201520825135.1U CN201520825135U CN205414465U CN 205414465 U CN205414465 U CN 205414465U CN 201520825135 U CN201520825135 U CN 201520825135U CN 205414465 U CN205414465 U CN 205414465U
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CN
China
Prior art keywords
workbench
hydraulic cylinder
locking
machine tool
swing pinion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520825135.1U
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Chinese (zh)
Inventor
焦友智
郭健
来传华
肖启明
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Chongqing Qiaoli Pipe Manufacturing Co ltd
Original Assignee
Chongqing Qiaoli Pipe Manufacturing Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Priority to CN201520825135.1U priority Critical patent/CN205414465U/en
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Publication of CN205414465U publication Critical patent/CN205414465U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a two fixed position rotation are bloated, and vertical numerically -controlled machine tool is made up in compact form drilling, includes base, stand, hydraulic slide rail, and the last hydraulic pressure slide that is equipped with of hydraulic slide rail is equipped with hydraulic drive mechanism in the stand, be equipped with unit head and multi -shaft box on the hydraulic pressure slide, multi -shaft box is last to be equipped with a plurality of output main shafts, is equipped with the connecting rod on the output main shaft, still be equipped with A disc -shaped's workstation on the base, be equipped with clamping machine on the workstation and construct, the below of workstation is equipped with the workstation pivot, is equipped with rotary driving mechanism in the base, rotary driving mechanism includes swing pinion, drive gear and step motor, still include two position locking mechanism, position locking mechanism includes the mount pad, is equipped with locking hydraulic cylinder on the mount pad, and fixed mounting has the clamping block on locking hydraulic cylinder's the piston rod, and the clamping block is equipped with the locking teeth with rotatory gear engagement, contained angle alpha = 360 aZ+360/2Z between two position locking mechanism's locking hydraulic cylinder's the axis, wherein, Z is the number of teeth of swing pinion, and an is more than or equal to 1's positive integer.

Description

Double position rotating expansion chucks boring combined vertical Digit Control Machine Tool
Technical field
This utility model belongs to numerical control machine tool technique field, is specifically related to a kind of double position rotating expansion chuck boring combined vertical Digit Control Machine Tool.
Background technology
Building-block machine industry and enterprise provides special equipment mainly for automobile, motorcycle, internal combustion engine, agricultural machinery, engineering machinery, chemical machinery, military project, the energy, light industry and household electric appliances, and gradually starts to change to NC postprocessing, flexibility.Building-block machine and transfer matic thereof are that to integrate electromechanics be manufacturing technology that comprehensive automation degree is higher and set technique equipment.Its feature is efficient, high-quality, economical and practical, thus is widely used and engineering machinery, traffic, the energy, military project, light industry, household electric appliances.
For some disk-like accessories, the heart is provided with central shaft the most wherein, and the card of dish like members is provided with the connecting hole uniform relative to central shaft annular, and connecting hole can be through hole, it is also possible to be tapped blind hole.In the processing of this kind of disk-like accessory, prior art needs to carry out these connecting holes the most respectively Drilling operation, not only inefficiency, and the position error that causes of multiple bearing can cause the reduction of processing precision of products.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of double position rotating expansion chuck boring combined vertical Digit Control Machine Tool, it is possible to completes the Drilling operation in multiple hole simultaneously, has the advantage that working (machining) efficiency is high and machining accuracy is high.
For reaching above-mentioned purpose, this utility model following technical scheme of offer:
A kind of double position rotating expansion chuck boring combined vertical Digit Control Machine Tool, it is characterized in that: include base, the column being fixedly mounted on described base, the front end of described column is provided with vertical hydraulic pressure slide rail, described hydraulic pressure slide rail is provided with the hydraulic pressure slide being slidably matched with it, is provided with the hydraulic drive mechanism for driving described hydraulic pressure slide to move in described column;On described hydraulic pressure slide, fixed installation is provided with unit head and the axles box being in transmission connection with described unit head, and described axles box is provided with multiple output main shafts of the most uniform setting, and described output main shaft is provided with the connecting rod for connecting drilling tool;Being additionally provided with on described base and be positioned at below described axles box and workbench in the form of annular discs, described workbench is provided with the clamping mechanism for clamping disk-like accessory;
Described clamping mechanism includes center clamping mechanism and the edge clamping mechanism for fixed disk like members edge;Described center clamping mechanism includes the adapter sleeve being fixedly mounted on described workbench, described adapter sleeve inner sleeve is equiped with expansion set, it is provided with central bore in described expansion set, it is swelling end that described expansion set is positioned at the opening of described central bore, the other end is for connecting end, and on the swelling end of described expansion set, annular is laid with at least three expanding trough;It is provided with tapered face fit structure between swelling end periphery wall and the inner hole wall of described adapter sleeve of described expansion set, is provided with in described base for being connected and for straining the swelling hydraulic cylinder of described expansion set with the described end that is connected;
The lower section of described workbench is provided with workbench rotating shaft, is provided with the rotary drive mechanism for driving described worktable rotary in described base;Described rotary drive mechanism includes that what the swing pinion being arranged in described workbench rotating shaft engaged with described swing pinion drives gear and for the motor driving described driving gear to rotate;Being provided with through hole in described workbench rotating shaft, described swelling hydraulic cylinder is arranged on the bottom of described workbench rotating shaft, and the piston rod of described swelling hydraulic cylinder is connected with the connection end of described expansion set by this through hole;Also include two position locking mechanisms for locking described swing pinion position;Described position locking mechanism includes the mounting seat being fixedly mounted in described base, described mounting seat is provided with locking hydraulic cylinder, being installed with clamping block on the piston rod of described locking hydraulic cylinder, described clamping block is provided with, towards the side of described swing pinion, the locking teeth engaged with described swing pinion;The axis of described locking hydraulic cylinder is positioned at described driving gear in the radial direction, and the angle α=360 ° * a/Z+360 °/2Z between the axis of the locking hydraulic cylinder of two described position locking mechanisms, wherein, Z is the number of teeth of swing pinion, and a is the positive integer more than or equal to 1.
Further, being additionally provided with position-limit mechanism between described expansion set and described adapter sleeve, described position-limit mechanism includes being arranged on described expansion set sidewall and along the stopper slot that the bus of expansion set extends, described adapter sleeve is correspondingly provided with spacer pin installing hole with described stopper slot.
Further, described edge clamping mechanism includes the radial direction slide rail being radially arranged on described workbench, be slidably installed in described radial direction slide rail the bearing for being supported on dish like members bottom surface with it, the briquetting being arranged over for pushing down dish like members end face of described bearing, described is provided with screw rod and is connected between bearing and briquetting, and described screw rod is provided with at described the spring between bearing and briquetting, described screw rod is provided with clamp nut.
Further, described hydraulic drive mechanism includes the driving hydraulic cylinder being fixedly installed in described column, fix on the piston rod of described driving hydraulic cylinder and be connected with transmission band, and the top of described column is provided with the fixed pulley coordinated with described transmission band, the other end of described transmission band is fixing with described hydraulic pressure slide to be connected.
Further, described unit head includes the servomotor being fixedly mounted on described hydraulic pressure slide.
Further, described axles box includes the intermediate rotary shaft being connected with the output shaft of described servomotor, described output main shaft is relative to the most uniform setting of the axis of described intermediate rotary shaft, and described intermediate rotary shaft is provided with the driving gear of synchronous rotation, described output main shaft is provided with the driven gear engaged with described driving gear.
Further, on described base, annular is laid with the support roller for supporting described workbench, and the axis of described support roller is respectively positioned on described workbench in the radial direction.
Further, described mounting seat is provided with the guide rail being positioned at described swing pinion radial direction, and described clamping block is slidably installed on described guide rail.
The beneficial effects of the utility model are:
Of the present utility model pair of position rotating expansion chuck boring combined vertical Digit Control Machine Tool, by arranging center clamping mechanism and edge clamping mechanism on the table, during use, the central shaft of dish like members is inserted in expansion set, utilizing swelling hydraulic cylinder to pull expansion set, can be fixed by the central shaft clamping of dish like members, employing edge, the edge clamping mechanism of dish like members is fixed, so, the clamping that can realize dish like members is fixed;Then utilize be arranged on axles box many dish like members to be carried out Drilling operation with output main shaft simultaneously, the Drilling operation in multiple hole can be completed simultaneously, there is the advantage that machining accuracy is high and working (machining) efficiency is high;By being provided for driving the rotary drive mechanism of worktable rotary in base, pass through rotary table, again hole on workpiece with output main shaft more than available, so, when the quantity in the hole of processing required on workpiece more and when exporting the lazy weight of main shaft, again workpiece can be carried out Drilling operation by rotary table, and it is finally completed the processing in all of hole, the scope of application of machine tool can be improved, simplify the structure of axles box, and improve working (machining) efficiency;Additionally, by arranging two position locking mechanisms, the rotation location of workbench can not only be realized, and and the angle of two position locking mechanisms is set to α=360 ° * a/Z+360 °/2Z, so, two position locking mechanisms can be respectively adopted workbench different rotary angle is locked, the half of the mechanical angle that the position of workbench locking precision is each gear teeth of swing pinion and teeth groove accounts for relative to its center more, it is possible to be effectively improved position locking precision.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and beneficial effect clearer, this utility model provides drawings described below to illustrate:
Fig. 1 is the structural representation of this utility model double position rotating expansion chuck boring combined vertical Digit Control Machine Tool embodiment;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the structural representation of workbench;
The structural representation of clamping mechanism centered by Fig. 4;
Fig. 5 is the A detail drawing of Fig. 2;
Fig. 6 is the location diagram between position locking mechanism and swing pinion.
Detailed description of the invention
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can be better understood from this utility model and can be practiced, but illustrated embodiment is not as to restriction of the present utility model.
As it is shown in figure 1, be the structural representation of this utility model double position rotating expansion chuck boring combined vertical Digit Control Machine Tool embodiment.Double position rotating expansion chucks boring combined vertical Digit Control Machine Tool of the present embodiment, including base 1, the column 2 that is fixedly mounted on base 1, the front end of column 2 is provided with vertical hydraulic pressure slide rail 3, hydraulic pressure slide rail 3 is provided with the hydraulic pressure slide 4 being slidably matched with it, is provided with the hydraulic drive mechanism for driving hydraulic pressure slide 4 to move in column 2.The hydraulic drive mechanism of the present embodiment includes the driving hydraulic cylinder 5 being fixedly installed in column 2, drive to fix on the piston rod of hydraulic cylinder 5 and be connected with transmission band 6, and the top of column 2 is provided with the fixed pulley 7 coordinated with transmission band 6, the other end of transmission band 6 is fixing with hydraulic pressure slide 4 to be connected.
On hydraulic pressure slide 4, fixed installation is provided with unit head 8 and the axles box 9 being in transmission connection with unit head 8, and axles box 9 is provided with multiple output main shafts 10 of the most uniform setting, and output main shaft 10 is provided with the connecting rod 12 for connecting drilling tool 11.Unit head 8 includes the servomotor being fixedly mounted on hydraulic pressure slide 4.The axles box 9 of the present embodiment includes the intermediate rotary shaft that the output shaft with servomotor is connected, output main shaft 10 is relative to the most uniform setting of the axis of intermediate rotary shaft, and intermediate rotary shaft is provided with the driving gear of synchronous rotation, output main shaft is provided with the driven gear engaged with driving gear.Utilize gear drive, all output main shafts 10 can be simultaneously driven and rotate.The axles box 9 of the present embodiment is provided with 4 output main shafts 10 of the most uniform setting.
Being additionally provided with the workbench 13 being positioned at below axles box 9 on base 1, workbench 13 is provided with the clamping mechanism for clamping disk-like accessory.The clamping mechanism of the present embodiment includes center clamping mechanism and the edge clamping mechanism for fixed disk like members edge;Center clamping mechanism includes the adapter sleeve 14 being fixedly mounted on workbench 13, adapter sleeve 14 inner sleeve is equiped with expansion set 15, it is provided with central bore in expansion set 15, it is swelling end that expansion set 15 is positioned at the opening of central bore, the other end is for connecting end, and on the swelling end of expansion set 15, annular is laid with at least three expanding trough 16.Be provided with tapered face fit structure 17 between swelling end periphery wall and the inner hole wall of adapter sleeve 14 of expansion set 15, be provided with in base 1 for be connected with expansion set 15 end be connected and for straining the swelling hydraulic cylinder 18 of expansion set 15.Preferably, being additionally provided with position-limit mechanism between expansion set 15 and adapter sleeve 14, position-limit mechanism includes being arranged on expansion set 15 sidewall and along the stopper slot 19 that the bus of expansion set extends, adapter sleeve 14 is correspondingly provided with spacer pin installing hole 20 with stopper slot 19.
Further, the edge clamping mechanism of the present embodiment includes the radial direction slide rail 21 being radially arranged on workbench 13, radially be slidably installed in slide rail 21 bearing 22 for being supported on dish like members bottom surface with it, prop up the briquetting 23 being arranged over for pushing down dish like members end face of bearing 22, it is provided with screw rod 24 between bearing 22 and briquetting 23 to be connected, and screw rod 24 is provided with at the spring propped up between bearing 22 and briquetting 23, screw rod 24 is provided with clamp nut.
The lower section of the workbench 13 of the present embodiment is provided with workbench rotating shaft 25, is provided with the rotary drive mechanism for driving workbench 13 to rotate in base 1.Rotary drive mechanism can use various ways to realize.The rotary drive mechanism of the present embodiment includes that what the swing pinion 26 being arranged in described workbench rotating shaft 25 engaged with described swing pinion 26 drives gear 27 and for the motor 28 driving described driving gear 27 to rotate.Utilize motor 28, workbench 13 can be driven to rotate according to the angle set.Preferably, on base 1, annular is laid with the support roller for supporting described workbench 13, the axis of described support roller is respectively positioned on described workbench 13 in the radial direction, can either support works platform 13, work platform for placing 13 in the vertical direction vibrates, and can reduce again the frictional resistance between workbench 13 and base 1.
Concrete, it being provided with through hole in the workbench rotating shaft 25 of the present embodiment, swelling hydraulic cylinder 18 is arranged on the bottom of workbench rotating shaft 25, and the piston rod of swelling hydraulic cylinder 18 is connected with the connection end of expansion set 15 by this through hole.
Two position locking mechanisms for locking swing pinion 26 position it are additionally provided with in the base of the present embodiment.The position locking mechanism of the present embodiment includes the mounting seat 29 being fixedly mounted in base 1, mounting seat 29 is provided with locking hydraulic cylinder 30, being installed with clamping block 31 on the piston rod of locking hydraulic cylinder 30, clamping block 31 is provided with, towards the side of swing pinion 26, the locking teeth engaged with swing pinion 26.The axis of locking hydraulic cylinder 30 is positioned at swing pinion 26 in the radial direction, so, locking hydraulic cylinder 30 is utilized to drive clamping block 31 to engage with swing pinion 26, the i.e. position of lockable workbench 13, can not only prevent workbench from loosening in machining process, and the positional precision of workbench can be effectively improved.Angle α=360 ° * a/Z+360 °/2Z between the axis of the locking hydraulic cylinder of two position locking mechanisms of the present embodiment, wherein, Z is the number of teeth of swing pinion, and a is the positive integer more than or equal to 1, as shown in Figure 6.
Preferably, mounting seat 29 is provided with the guide rail 32 being positioned at swing pinion 26 radial direction, and clamping block 31 is slidably installed on guide rail 32, for clamping block 31 moves guiding, and is prevented from clamping block 31 and vibrates in the direction being perpendicular to guide rail 32.
Double position rotating expansion chucks boring combined vertical Digit Control Machine Tool of the present embodiment, by arranging center clamping mechanism and edge clamping mechanism on the table, during use, the central shaft of dish like members is inserted in expansion set, utilizing swelling hydraulic cylinder to pull expansion set, can be fixed by the central shaft clamping of dish like members, employing edge, the edge clamping mechanism of dish like members is fixed, so, the clamping that can realize dish like members is fixed;Then utilize be arranged on axles box many dish like members to be carried out Drilling operation with output main shaft simultaneously, the Drilling operation in multiple hole can be completed simultaneously, there is the advantage that machining accuracy is high and working (machining) efficiency is high;By being provided for driving the rotary drive mechanism of worktable rotary in base, pass through rotary table, again hole on workpiece with output main shaft more than available, so, when the quantity in the hole of processing required on workpiece more and when exporting the lazy weight of main shaft, again workpiece can be carried out Drilling operation by rotary table, and it is finally completed the processing in all of hole, the scope of application of machine tool can be improved, simplify the structure of axles box, and improve working (machining) efficiency;Additionally, by arranging two position locking mechanisms, the rotation location of workbench can not only be realized, and and the angle of two position locking mechanisms is set to α=360 ° * a/Z+360 °/2Z, so, two position locking mechanisms can be respectively adopted workbench different rotary angle is locked, the half of the mechanical angle that the position of workbench locking precision is each gear teeth of swing pinion and teeth groove accounts for relative to its center more, it is possible to be effectively improved position locking precision.
Embodiment described above is only the preferred embodiment lifted by absolutely proving this utility model, and protection domain of the present utility model is not limited to this.The equivalent that those skilled in the art are made on the basis of this utility model substitutes or conversion, all within protection domain of the present utility model.Protection domain of the present utility model is as the criterion with claims.

Claims (8)

1. a double position rotating expansion chuck boring combined vertical Digit Control Machine Tool, it is characterized in that: include base, the column being fixedly mounted on described base, the front end of described column is provided with vertical hydraulic pressure slide rail, described hydraulic pressure slide rail is provided with the hydraulic pressure slide being slidably matched with it, is provided with the hydraulic drive mechanism for driving described hydraulic pressure slide to move in described column;On described hydraulic pressure slide, fixed installation is provided with unit head and the axles box being in transmission connection with described unit head, and described axles box is provided with multiple output main shafts of the most uniform setting, and described output main shaft is provided with the connecting rod for connecting drilling tool;Being additionally provided with on described base and be positioned at below described axles box and workbench in the form of annular discs, described workbench is provided with the clamping mechanism for clamping disk-like accessory;
Described clamping mechanism includes center clamping mechanism and the edge clamping mechanism for fixed disk like members edge;Described center clamping mechanism includes the adapter sleeve being fixedly mounted on described workbench, described adapter sleeve inner sleeve is equiped with expansion set, it is provided with central bore in described expansion set, it is swelling end that described expansion set is positioned at the opening of described central bore, the other end is for connecting end, and on the swelling end of described expansion set, annular is laid with at least three expanding trough;It is provided with tapered face fit structure between swelling end periphery wall and the inner hole wall of described adapter sleeve of described expansion set, is provided with in described base for being connected and for straining the swelling hydraulic cylinder of described expansion set with the described end that is connected;
The lower section of described workbench is provided with workbench rotating shaft, is provided with the rotary drive mechanism for driving described worktable rotary in described base;Described rotary drive mechanism includes that what the swing pinion being arranged in described workbench rotating shaft engaged with described swing pinion drives gear and for the motor driving described driving gear to rotate;Being provided with through hole in described workbench rotating shaft, described swelling hydraulic cylinder is arranged on the bottom of described workbench rotating shaft, and the piston rod of described swelling hydraulic cylinder is connected with the connection end of described expansion set by this through hole;Also include two position locking mechanisms for locking described swing pinion position;Described position locking mechanism includes the mounting seat being fixedly mounted in described base, described mounting seat is provided with locking hydraulic cylinder, being installed with clamping block on the piston rod of described locking hydraulic cylinder, described clamping block is provided with, towards the side of described swing pinion, the locking teeth engaged with described swing pinion;The axis of described locking hydraulic cylinder is positioned at described driving gear in the radial direction, and the angle α=360 ° * a/Z+360 °/2Z between the axis of the locking hydraulic cylinder of two described position locking mechanisms, wherein, Z is the number of teeth of swing pinion, and a is the positive integer more than or equal to 1.
The most according to claim 1 pair of position rotating expansion chuck boring combined vertical Digit Control Machine Tool, it is characterized in that: between described expansion set and described adapter sleeve, be additionally provided with position-limit mechanism, described position-limit mechanism includes being arranged on described expansion set sidewall and along the stopper slot that the bus of expansion set extends, described adapter sleeve is correspondingly provided with spacer pin installing hole with described stopper slot.
The most according to claim 1 pair of position rotating expansion chuck boring combined vertical Digit Control Machine Tool, it is characterized in that: described edge clamping mechanism includes the radial direction slide rail being radially arranged on described workbench, be slidably installed in described radial direction slide rail the bearing for being supported on dish like members bottom surface with it, the briquetting being arranged over for pushing down dish like members end face of described bearing, described is provided with screw rod and is connected between bearing and briquetting, and described screw rod is provided with at described the spring between bearing and briquetting, described screw rod is provided with clamp nut.
The most according to claim 1 pair of position rotating expansion chuck boring combined vertical Digit Control Machine Tool, it is characterized in that: described hydraulic drive mechanism includes the driving hydraulic cylinder being fixedly installed in described column, fix on the piston rod of described driving hydraulic cylinder and be connected with transmission band, and the top of described column is provided with the fixed pulley coordinated with described transmission band, the other end of described transmission band is fixing with described hydraulic pressure slide to be connected.
The most according to claim 1 pair of position rotating expansion chuck boring combined vertical Digit Control Machine Tool, it is characterised in that: described unit head includes the servomotor being fixedly mounted on described hydraulic pressure slide.
The most according to claim 5 pair of position rotating expansion chuck boring combined vertical Digit Control Machine Tool, it is characterized in that: described axles box includes the intermediate rotary shaft being connected with the output shaft of described servomotor, described output main shaft is relative to the most uniform setting of the axis of described intermediate rotary shaft, and described intermediate rotary shaft is provided with the driving gear of synchronous rotation, described output main shaft is provided with the driven gear engaged with described driving gear.
The most according to claim 1 pair of position rotating expansion chuck boring combined vertical Digit Control Machine Tool, it is characterized in that: on described base, annular is laid with the support roller for supporting described workbench, and the axis of described support roller is respectively positioned on described workbench in the radial direction.
The most according to claim 1 pair of position rotating expansion chuck boring combined vertical Digit Control Machine Tool, it is characterised in that: described mounting seat is provided with the guide rail being positioned at described swing pinion radial direction, and described clamping block is slidably installed on described guide rail.
CN201520825135.1U 2015-10-24 2015-10-24 Two fixed position rotation are bloated, and vertical numerically -controlled machine tool is made up in compact form drilling Expired - Fee Related CN205414465U (en)

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Application Number Priority Date Filing Date Title
CN201520825135.1U CN205414465U (en) 2015-10-24 2015-10-24 Two fixed position rotation are bloated, and vertical numerically -controlled machine tool is made up in compact form drilling

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Application Number Priority Date Filing Date Title
CN201520825135.1U CN205414465U (en) 2015-10-24 2015-10-24 Two fixed position rotation are bloated, and vertical numerically -controlled machine tool is made up in compact form drilling

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106735444A (en) * 2017-03-14 2017-05-31 环球工业机械(东莞)有限公司 A kind of new air-cylinder type knife rest turning device
CN106735406A (en) * 2016-12-06 2017-05-31 苏州工业职业技术学院 A kind of pair of double rig floor automatic drilling machines of rotating disk

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106735406A (en) * 2016-12-06 2017-05-31 苏州工业职业技术学院 A kind of pair of double rig floor automatic drilling machines of rotating disk
CN106735406B (en) * 2016-12-06 2018-11-09 苏州工业职业技术学院 A kind of double rig floor automatic drilling machines of double turntables
CN106735444A (en) * 2017-03-14 2017-05-31 环球工业机械(东莞)有限公司 A kind of new air-cylinder type knife rest turning device

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160803

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CF01 Termination of patent right due to non-payment of annual fee