CN105728857B - Along with formula deburring polishing main shaft and deburring method - Google Patents
Along with formula deburring polishing main shaft and deburring method Download PDFInfo
- Publication number
- CN105728857B CN105728857B CN201610158906.5A CN201610158906A CN105728857B CN 105728857 B CN105728857 B CN 105728857B CN 201610158906 A CN201610158906 A CN 201610158906A CN 105728857 B CN105728857 B CN 105728857B
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- connecting rod
- deflection
- encoder
- motor
- main shaft
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
- B23D79/02—Machines or devices for scraping
- B23D79/04—Machines or devices for scraping with rotating cutting-tool, e.g. for smoothing linings of bearings
Abstract
The invention discloses a kind of along with formula deburring polishing main shaft, it can realize that flash removed processing stress is small, situations such as reducing to equipment integral rigidity, workpiece positioning requirements, and detect burr, the cast gate of casting in real time.It is a kind of suitable with formula deburring polishing main shaft, including unit head of polishing, unit head of polishing is located at the first end of connecting rod, second end of connecting rod, which is connected with main body, makes polishing unit head flexibly be pressed on workpiece, and connecting rod is set to be set relative to main body mobile route into deflection angle by main body, the deflection encoder of main body is used to gather deflection angle change.
Description
Technical field
The invention belongs to the technical field of casting deburring device, concretely relates to a kind of sanding burr main shaft.This
Outside, the present invention also provides a kind of burr removing method.
Background technology
During die cast metal, due to erosion of the HTHP metal fluid to mould, cause at the parting line of product
There are many burrs, simultaneously because the requirement of extrusion process, die-cast product has thicker cast gate residual, there are many removals at present
The processing mode and relevant device of burr, limited due to all Alternative or equipment investment costs, processing cost etc. be present, at present state
Interior deburring is still main by the way of artificial removal.Although artificial deburring operation is relatively flexible, exists and use
The shortcomings of work cost is higher, and security is poor, and processing environment is severe.Therefore it always is the problem of die casting deburring and looks forward in the industry
Industry and professional person's key research projects.On the other hand, how to realize flash removed processing stress it is small, reduce to equipment integral rigidity,
Workpiece positioning requirements, and in real time detect casting burr, cast gate situations such as, be urgently those skilled in the art solve skill
Art problem.
The content of the invention
It is an object of the invention to provide a kind of along with formula deburring polishing main shaft, it can realize that flash removed processes stress
It is small, situations such as reducing to equipment integral rigidity, workpiece positioning requirements, and detect burr, the cast gate of casting in real time.
In order to solve the above technical problems, the object of the present invention is achieved like this：
It is a kind of to be located at the first end of connecting rod along with formula deburring polishing main shaft, including polishing unit head, polishing unit head, even
Second end of bar, which is connected with main body, makes polishing unit head flexibly be pressed on workpiece, and makes connecting rod relative to master by main body
Body mobile route is set into deflection angle, and the deflection encoder of main body is used to gather deflection angle change.
On the basis of such scheme and as the preferred scheme of such scheme：The main body is servomotor, and servo is electric
The output shaft of machine is fixedly connected with the second end of connecting rod, and the deflection encoder is the encoder that the servomotor carries.
On the basis of such scheme and as the preferred scheme of such scheme：The main body includes deflection motor, deflection
The output end of motor is fixedly connected with support, and support is also rotatably connected with the second end of connecting rod, one end and the support phase of torsion spring
Connection, the other end of torsion spring are connected with connecting rod, and the pedestal for deflecting encoder is fixedly connected with support, deflects the rotating shaft of encoder
It is connected with connecting rod.
On the basis of such scheme and as the preferred scheme of such scheme：The rotating shaft of the deflection encoder passes through volume
Code device connecting rod is connected with connecting rod.
On the basis of such scheme and as the preferred scheme of such scheme：One end of the torsion spring passes through clamping motor
It is connected with support.
On the basis of such scheme and as the preferred scheme of such scheme：One end of electromagnetic clutch is fixed with support
Connection, the other end of electromagnetic clutch are fixedly connected with connecting rod, and electromagnetic clutch has the through hole passed through for torsion spring.
On the basis of such scheme and as the preferred scheme of such scheme：It is provided with and connects on the second end of the connecting rod
Receive chamber one, support is sheathed on receiving compartment one, and the receiving compartment two for being used for receiving deflection encoder is provided with support, is connect described
The side wall of chamber two received is provided with for the port that passes through of deflection encoder.
On the basis of such scheme and as the preferred scheme of such scheme：The deflection motor include stepper motor and
Decelerator, the rotating shaft of stepper motor and the input of decelerator are connected；Or the deflection motor includes conventional DC electricity
The input of machine, decelerator and encoder, the rotating shaft of common DC motor and decelerator is connected, the output end of decelerator with
The pedestal of encoder is connected.
On the basis of such scheme and as the preferred scheme of such scheme：The clamping motor include stepper motor and
Decelerator, the rotating shaft of stepper motor and the input of decelerator are connected；Or the deflection motor includes conventional DC electricity
The input of machine, decelerator and encoder, the rotating shaft of common DC motor and decelerator is connected, the output end of decelerator with
The pedestal of encoder is connected.
It is a kind of using the above-mentioned burr removing method along main shaft of being polished with formula deburring：Including：A) controls numerical control device
Main shaft is pressed on polishing unit head to be polished on workpiece, and connecting rod is set with main body mobile route into deflection angle；
B) the first secondary control of digital control systems main axle moving, so as to drag polishing unit head along the profile for being polished workpiece
It is mobile, in the moving process of grinding head, the change of deflection encoder collection deflection angle, and by the information conveyance collected to
The digital control system of numerical control device,
C) after the completion of above-mentioned steps, digital control system obtains being polished the actual feelings of burr on workpiece according to the information analysis
Condition, digital control system control main axle moving polishing unit head is pointedly carried out to it to the position for the angle change that deflects
Polishing.
The present invention is prominent and beneficial compared with prior art to be had the technical effect that：
The present invention's is suitable with formula deburring polishing main shaft, by agent structure and main body and the attachment structure of connecting rod, makes
Polishing unit head, which is flexibly pressed on, to be polished on workpiece, and the change of deflection angle is converted into electricity using coder structure is deflected
Signal, so as to reach the purpose for situations such as detecting burr, cast gate in real time.The present invention's is suitable with formula deburring polishing main shaft, adopts
Remove material with grinding, along with formula feed, processing stress is small, relatively low to equipment integral rigidity, workpiece positioning requirements, so as to applied to
Inexpensive numerical control device, and it is easy to implement automation processing.Using when, its detect data be uploaded to digital control system, digital control system
The actual conditions of hard edges can be drawn according to data analysis and carry out targetedly optimization processing.
Brief description of the drawings
Fig. 1 is the structural representation of embodiments of the invention one.
Fig. 2 is the schematic diagram of the present invention.
Fig. 3 is the structural representation of embodiments of the invention two.
Fig. 4 is the structural representation of embodiments of the invention three.
Fig. 5 is the structural representation of embodiments of the invention four.
Embodiment
With specific embodiment, the invention will be further described below in conjunction with the accompanying drawings, referring to Fig. 1-Fig. 5；
Need what is illustrated, deflection encoder is the encoder of ordinary construction, for ease of distinguishing correlation technique feature, is ordered
Entitled deflection encoder.
Embodiment one,
This gives a kind of along with formula deburring polishing main shaft, it is dynamic that it includes servomotor 1, connecting rod 2 and polishing
Power first 3.The first end of connecting rod is rigidly connected with polishing unit head.Second end of connecting rod is connected with the output end of servomotor.
So, connecting rod can be rotated by the output end center line of servomotor.Connecting rod is set to be moved relative to servomotor by servomotor
Path is set into deflection angle a1.In use, unit head of polishing be transformed into be polished the another side of workpiece along when, pass through servo
Motor readjusts the relative position of support and connecting rod, connecting rod is also kept deflection angle relative to servomotor mobile route
a1.The mobile route of servomotor is set by the profile for being polished workpiece.The encoder carried in servomotor is compiled as deflection
Code device, for gathering the change of deflection angle.Due to servomotor self-characteristic, it can apply certain to connecting rod at work
Moment of torsion so that polishing unit head can be flexibly pressed on and is polished on workpiece 100, so that polishing unit head removes defeathering
Thorn.When larger spur locations such as polishing unit head conduct cast gates, because it disposably can not be polished totally by thorough, so that
So that polishing unit head drivening rod line centered on the output end of servomotor rotates, deflection angle a1 is caused to change to deflection
Angle a2, form along with formula feed.Deflection encoder gathers deflection angle change.It is understood that in the present embodiment
In, by the attachment structure of servomotor and connecting rod, it is angle displacement by the larger shape transformation of burr 101 such as cast gate, utilizes volume
Turn encoder and angular displacement is changed into electric signal, for identification.
It should be noted that in the present embodiment, servomotor makes polishing unit head flexibly be pressed on work as main body
On part, and connecting rod is set to be set relative to main body conduct route into deflection angle by main body.
During using this along being processed with formula deburring polishing main shaft, main body is installed on the main shaft of numerical control control equipment, main
Axle moves according to the mobile route set by workpiece configurations, and link centerline and main body mobile route are into certain deflection angle
Degree, i.e. main shaft are dragged polishing unit head by connecting rod and workpiece are processed at an angle, when polishing unit head is being advanced
When tiny burr is run on path, can directly it remove, connecting rod does not deflect substantially；If run into the larger hair such as cast gate
Thorn, polishing unit head can move under the dragging of main body along with burr outer contour so that connecting rod is inclined with main body mobile route
Gyration changes, and changes to a2 from a1, encoder can gather corresponding data and be uploaded to the digital control system of equipment.If
Standby digital control system can analysis of encoding device data draw the real-time appearance profile of workpiece, amendment optimization main axle moving path, make polishing
Head is pointedly polished the position for producing deflection angle, realizes that Efficient intelligent is processed.It is understood that originally simultaneously
Invention is using grinding except material, and along with formula feed, processing stress is small, relatively low to equipment integral rigidity, workpiece positioning requirements, so as to
Applied to inexpensive numerical control device, and it is easy to implement automation processing.
Embodiment two：
The present embodiment provides suitable with formula deburring polishing main shaft, including polishing unit head 3, polish unit head 3 and connecting rod
2 first end is connected.Second end of connecting rod 2 is provided with receiving compartment 1.The output end of deflection motor 1 is connected with support 4.This
The deflection motor of embodiment includes stepper motor and decelerator, and the rotating shaft of stepper motor and the input of decelerator are connected,
Output end of the output shaft of decelerator as deflection motor.Certainly, deflection motor can also use following structure：It is included commonly
The input of direct current generator, decelerator and encoder, the rotating shaft of common DC motor and decelerator is connected, decelerator it is defeated
Go out end with the pedestal of encoder to be connected, the output end of the rotating shaft of encoder as the deflection motor of this structure.By deflection
Motor makes connecting rod be set relative to deflection motor mobile route into deflection angle a1.In use, polishing unit head be transformed into by
Polish workpiece another side along when, the relative position of support and connecting rod is readjusted by deflection motor, makes connecting rod relative to inclined
Rotating motor mobile route also keeps deflection angle a1.Support 4 also inserts receiving compartment 1, and the second end of support 4 and connecting rod 2
It is rotatably connected.Receiving compartment 2 41 is additionally provided with support 4, deflection encoder 5 is provided with receiving compartment two, deflects the base of encoder
Seat is fixedly connected with support, and the rotating shaft 51 for deflecting encoder is fixedly connected with connecting rod 2.One end of torsion spring 7 is connected with support, turns round
The other end of spring is connected with connecting rod.In the present embodiment, the rotating shaft for deflecting encoder is fixed on the bottom wall of receiving compartment two.Together
Sample, deflecting the rotating shaft of encoder can also be connected in the side wall of receiving compartment one by encoder connecting rod.
In the present embodiment, support is formed with connecting rod and is rotatably connected, the power exported by the output end of deflection motor
Square is delivered on connecting rod by support, button spring, and it makes the polishing unit head on connecting rod flexibly be pressed on to be polished as main body
On workpiece.This structure along with formula deburring polish main shaft operation principle provide to example one it is similar, it is no longer detailed here
State.
Using when will be fixed to numerical control device main shaft for the steering engine base 8 for fixing servomotor.
Embodiment three
The present embodiment provides suitable with formula deburring polishing main shaft, is led what embodiment two provided along being polished with formula deburring
Clamping motor structure is set up on the basis of axle, specifically, including polishing unit head 3, the first end of polishing unit head and connecting rod 2
It is connected.Second end of connecting rod 2 is provided with receiving compartment one.The output end of deflection motor 1 is connected with support 4.The present embodiment it is inclined
Rotating motor includes stepper motor and decelerator, and the rotating shaft of stepper motor and the input of decelerator are connected, decelerator it is defeated
Output end of the shaft as deflection motor.Certainly, deflection motor can also use following structure：It include common DC motor,
Decelerator and encoder, the rotating shaft of common DC motor and the input of decelerator are connected, the output end and volume of decelerator
The pedestal of code device is connected, the output end of the rotating shaft of encoder as the deflection motor of this structure.Make company by deflection motor
Bar is set relative to deflection motor mobile route into deflection angle a1.Workpiece is polished in use, being transformed into polishing unit head
Another side along when, the relative position of support and connecting rod is readjusted by deflection motor, connecting rod is moved relative to deflection motor
Dynamic path also keeps deflection angle a1.Support 4 also inserts receiving compartment 1, and the second end of support 4 and connecting rod 2 rotatably connects
Connect.Receiving compartment 2 41 is additionally provided with support 4, deflection encoder 5 is provided with receiving compartment 2 41, deflects the pedestal and machine of encoder
Seat is fixedly connected, and the rotating shaft 51 for deflecting encoder is connected to by encoder connecting rod 6 in the side wall of receiving compartment one.Such as institute in figure
Show, port is provided with the side wall of receiving compartment two, and the port passes through for encoder connecting rod 6.One end of torsion spring 7 passes through clamping motor
10 are connected with support, and specifically, one end of the torsion spring is fixedly connected with the output end of clamping motor, the clamping motor
On support.Wherein, clamping motor includes stepper motor and decelerator, the rotating shaft of clamping motor and the input of decelerator
Drive connection, the output end of the output shaft of decelerator as clamping motor.Certainly, clamping motor can also use following structure：
It includes common DC motor, decelerator and encoder, and the rotating shaft of common DC motor and the input of decelerator are connected,
The output end of decelerator is connected with the pedestal of encoder, the output of the rotating shaft of encoder as the clamping motor of this structure
End.The other end of torsion spring is connected with connecting rod.
In the present embodiment, by thrust of the independent controls connecting rod of structure of clamping motor with being polished workpiece, it is easy to
Control.This is similar to the operation principle of embodiment two along the operation principle with formula deburring polishing main shaft, and I will not elaborate
Example IV：
The present embodiment provides suitable with formula deburring polishing main shaft, is led what embodiment two provided along being polished with formula deburring
The structure of electromagnetic clutch is set up on the basis of axle, specifically, including polishing unit head 3, the of polishing unit head and connecting rod 2
One end is connected.Second end of connecting rod 2 is provided with receiving compartment one.The output end of deflection motor 1 is connected with support 4.The present embodiment
Deflection motor include stepper motor and decelerator, the rotating shaft of stepper motor and the input of decelerator are connected, decelerator
Output end of the output shaft as deflection motor.Certainly, deflection motor can also use following structure：It includes conventional DC electricity
The input of machine, decelerator and encoder, the rotating shaft of common DC motor and decelerator is connected, the output end of decelerator with
The pedestal of encoder is connected, the output end of the rotating shaft of encoder as the deflection motor of this structure.Make by deflection motor
Connecting rod is set relative to deflection motor mobile route into deflection angle a1.Work is polished in use, being transformed into polishing unit head
The another side of part along when, the relative position of support and connecting rod is readjusted by deflection motor, makes connecting rod relative to deflection motor
Mobile route also keeps deflection angle a1.Support 4 also inserts receiving compartment 1, and the second end of support 4 and connecting rod 2 is rotatable
Connection.Receiving compartment 2 41 is additionally provided with support 4, deflection encoder 5 is provided with receiving compartment two, deflects the pedestal and machine of encoder
Seat is fixedly connected, and the rotating shaft 51 for deflecting encoder is connected to by encoder connecting rod in the side wall of receiving compartment one.As shown in FIG.,
Port is provided with the side wall of receiving compartment two, the port passes through for encoder connecting rod.One end of torsion spring is connected with support, torsion spring
7 other end is connected with connecting rod.One end of electromagnetic clutch 9 is fixedly connected with support, the other end of electromagnetic clutch and company
Bar is fixedly connected, and electromagnetic clutch has the through hole passed through for torsion spring.By the structure of electromagnetic clutch so that electromagnetic clutch
The elastic connection of support and connecting rod can be switched on demand and be rigidly connected.When being rigidly connected, polishing deburring energy can be lifted
Power.
It is a kind of to answer the above-mentioned burr removing method along main shaft of being polished with formula deburring：Including：
A) controls the main shaft of numerical control device to be pressed on polishing unit head and is polished on workpiece, and connecting rod moves with main body
Dynamic path is set into deflection angle；
B) the first secondary control of digital control systems main axle moving, so as to drag polishing unit head along the profile for being polished workpiece
It is mobile, in the moving process of grinding head, the change of deflection encoder collection deflection angle, and by the information conveyance collected to
The digital control system of numerical control device,
C) after the completion of above-mentioned steps, digital control system obtains being polished the actual feelings of burr on workpiece according to the information analysis
Condition, digital control system control main axle moving polishing unit head is pointedly carried out to it to the position for the angle change that deflects
Polishing.
Above-described embodiment is only presently preferred embodiments of the present invention, is not limited the scope of the invention according to this, therefore：It is all according to
The equivalence changes that structure, shape, the principle of the present invention is done, all should be covered by within protection scope of the present invention.
Claims (10)
- It is 1. a kind of along with formula deburring polishing main shaft, including polishing unit head, it is characterised in that：Unit head polish located at connecting rod First end, the second end of connecting rod are connected with the side that main body makes polishing unit head flexibly be pressed on workpiece, and main body is installed to number On the main shaft of control device, main shaft moves according to the mobile route set by workpiece configurations, and makes connecting rod by main body Set relative to main body mobile route into deflection angle, when polishing unit head, run on travel path can not be disposably thorough Polish clean burr when, deflection angle changes, and the deflection encoder of main body is used to gather deflection angle change for knowing Do not go out the real-time appearance profile of workpiece.
- It is 2. according to claim 1 along with formula deburring polishing main shaft, it is characterised in that：The main body is servomotor, The output shaft of servomotor is fixedly connected with the second end of connecting rod, and the deflection encoder is the coding that the servomotor carries Device.
- It is 3. according to claim 1 along with formula deburring polishing main shaft, it is characterised in that：The main body includes deflection electricity Machine, the output end of deflection motor are fixedly connected with support, and support is also rotatably connected with the second end of connecting rod, one end of torsion spring with Support is connected, and the other end of torsion spring is connected with connecting rod, and the pedestal for deflecting encoder is fixedly connected with support, deflects encoder Rotating shaft be connected with connecting rod.
- It is 4. according to claim 3 along with formula deburring polishing main shaft, it is characterised in that：The rotating shaft of the deflection encoder It is connected by encoder connecting rod with connecting rod.
- It is 5. according to claim 4 along with formula deburring polishing main shaft, it is characterised in that：One end of the torsion spring passes through pressure Tight motor is connected with support.
- It is 6. according to claim 4 along with formula deburring polishing main shaft, it is characterised in that：One end of electromagnetic clutch and machine Seat is fixedly connected, and the other end of electromagnetic clutch is fixedly connected with connecting rod, and electromagnetic clutch has the through hole passed through for torsion spring.
- It is 7. suitable with formula deburring polishing main shaft according to any one of claim 4-6, it is characterised in that：In the connecting rod The second end be provided with receiving compartment one, support is sheathed on receiving compartment one, is provided with support and is used to receive deflection encoder Receiving compartment two, the port passed through for deflection encoder is provided with the side wall of the receiving compartment two.
- It is 8. according to claim 3 along with formula deburring polishing main shaft, it is characterised in that：The deflection motor includes stepping Motor and decelerator, the rotating shaft of stepper motor and the input of decelerator are connected；Or the deflection motor is included commonly The input of direct current generator, decelerator and encoder, the rotating shaft of common DC motor and decelerator is connected, decelerator it is defeated Go out end with the pedestal of encoder to be connected.
- It is 9. according to claim 5 along with formula deburring polishing main shaft, it is characterised in that：The clamping motor includes stepping Motor and decelerator, the rotating shaft of stepper motor and the input of decelerator are connected；Or the deflection motor is included commonly The input of direct current generator, decelerator and encoder, the rotating shaft of common DC motor and decelerator is connected, decelerator it is defeated Go out end with the pedestal of encoder to be connected.
- A kind of 10. burr removing method along main shaft of being polished with formula deburring using described in claim 1：Including：A) controls the main shaft of numerical control device to be pressed on polishing unit head and is polished on workpiece, and connecting rod and main body movement road Footpath is set into deflection angle；B) the first secondary control of digital control systems main axle moving, moved so as to drag polishing unit head along the profile for being polished workpiece, In the moving process of grinding head, the change of deflection encoder collection deflection angle, and by the information conveyance collected to numerical control The digital control system of equipment,C) after the completion of above-mentioned steps, digital control system obtains being polished the actual conditions of burr on workpiece according to the information analysis, number Control system controls main axle moving polishing unit head is pointedly polished it to the position for the angle change that deflects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610158906.5A CN105728857B (en) | 2016-03-21 | 2016-03-21 | Along with formula deburring polishing main shaft and deburring method |
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|---|---|---|---|
| CN201610158906.5A CN105728857B (en) | 2016-03-21 | 2016-03-21 | Along with formula deburring polishing main shaft and deburring method |
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| CN105728857B true CN105728857B (en) | 2018-02-02 |
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| CN115008288B (en) * | 2022-07-01 | 2024-04-05 | 福州鸿基自动化设备有限公司 | Electric floating mechanism of deburring shaft and tool changing mechanism |
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| EP0318402A1 (en) * | 1987-11-25 | 1989-05-31 | Serdi - Societe D'etude De Realisation Et De Diffusion Industrielles | Tool-holding spindle for precision grinding machine, especially for a machine to grind the valve seats of a heat engine |
| CN202037476U (en) * | 2011-03-18 | 2011-11-16 | 陕西秦川机械发展股份有限公司 | Large-scale numerical control gear cutting machine |
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| CN103522159A (en) * | 2013-10-14 | 2014-01-22 | 陈功 | Automatic polishing method with constant force and equipment with same |
| CN203649566U (en) * | 2013-12-20 | 2014-06-18 | 吴江市震宇缝制设备有限公司 | Automatic chamfering machine for removing burrs from drilled hole of tubular housing |
| CN104002240A (en) * | 2013-02-25 | 2014-08-27 | 株式会社荏原制作所 | Method of adjusting profile of a polishing member used in a polishing apparatus, and polishing apparatus |
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2016
- 2016-03-21 CN CN201610158906.5A patent/CN105728857B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0318402A1 (en) * | 1987-11-25 | 1989-05-31 | Serdi - Societe D'etude De Realisation Et De Diffusion Industrielles | Tool-holding spindle for precision grinding machine, especially for a machine to grind the valve seats of a heat engine |
| CN202037476U (en) * | 2011-03-18 | 2011-11-16 | 陕西秦川机械发展股份有限公司 | Large-scale numerical control gear cutting machine |
| CN104002240A (en) * | 2013-02-25 | 2014-08-27 | 株式会社荏原制作所 | Method of adjusting profile of a polishing member used in a polishing apparatus, and polishing apparatus |
| CN203245458U (en) * | 2013-05-09 | 2013-10-23 | 慈溪市汇丽机电有限公司 | Cleaner for trimmings and burrs of hole |
| CN103522159A (en) * | 2013-10-14 | 2014-01-22 | 陈功 | Automatic polishing method with constant force and equipment with same |
| CN203649566U (en) * | 2013-12-20 | 2014-06-18 | 吴江市震宇缝制设备有限公司 | Automatic chamfering machine for removing burrs from drilled hole of tubular housing |
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| CN105728857A (en) | 2016-07-06 |
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