CN107931697B - Cutting method for copper-clad plate - Google Patents
Cutting method for copper-clad plate Download PDFInfo
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- CN107931697B CN107931697B CN201711139095.5A CN201711139095A CN107931697B CN 107931697 B CN107931697 B CN 107931697B CN 201711139095 A CN201711139095 A CN 201711139095A CN 107931697 B CN107931697 B CN 107931697B
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- copper
- clad plate
- cutting
- mixing roll
- plate
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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
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
- B23D15/06—Sheet shears
-
- 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
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/02—Arrangements for holding, guiding, and/or feeding work during the operation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
This patent is related to field of circuit boards, the cutting method for copper-clad plate is specifically disclosed, uses a kind of cutter device in method, cutter device is in use, milled processed simultaneously can be carried out to four corners of the copper-clad plate after cutting, improve the grinding efficiency of copper-clad plate edge；Copper-clad plate after simultaneous grinding can be stacked on bearing plate, convenient for the collection for concentrating copper-clad plate, no longer need to arrange the copper-clad plate of stacking.This programme can improve the grinding efficiency of copper-clad plate edge.
Description
Technical field
The invention belongs to field of circuit boards, and in particular to the cutting method for copper-clad plate.
Background technique
PCB Chinese is printed circuit board, also known as printed wiring board, it is important electronic component, is electronics member device
The carrier of supporter and the electronic component electrical connection of part.The process of molding printed wiring board is complicated, including opens
Material, drilling, heavy copper, pattern transfer, graphic plating, move back film, etching, green oil, character, plating golden finger, molding, test and final inspection this
13 big procedure of processings, wherein several small procedure of processings are further comprised in each step, it is specific in sawing sheet step
Processing be that copper-clad plate is carried out to cutting plate, cutting plate step can allow the size phase of the size of copper-clad plate and the printed wiring board after processing
It adapts to, chamfering and packaging then is carried out to the copper-clad plate after cutting.
The method of common double face copper substantially by be from top to bottom sequentially distributed first layer copper foil, adhesive sheet and second
Layer copper foil be made, the method for adhesive sheet is made from a variety of materials according to different requirements, generally by paper, glass-fiber-fabric, resin,
The stacked distribution of metal plate or multiple material is suppressed.
When the material in adhesive sheet is metal plate and glass-fiber-fabric, after cutting copper-clad plate, one on the section of copper-clad plate
As have the metal fragment or glass-fiber-fabric clast that leave after cutting, metal fragment or glass-fiber-fabric clast easily adhere to the side of copper-clad plate
At angle, metal fragment or glass-fiber-fabric clast are easy to scratch on the surface of copper-clad plate during mobile copper-clad plate, cause entire
The quality of copper-clad plate is bad；Multiple edges of copper-clad plate after cutting simultaneously have extra middle metal and glass-fiber-fabric, so needing
It wants the later period to be ground respectively using facing attachment to multiple edges of copper-clad plate, causes grinding efficiency low, reduce copper-clad plate
Processing efficiency；Will lead to copper-clad plate generates metal fragment or glass-fiber-fabric clast again simultaneously, needs to metal fragment or glass
Cloth clast is further cleared up, and the sawing sheet processing that will lead to entire copper-clad plate complicates, and is also added copper-clad plate surface and is scraped
Colored probability.
Summary of the invention
The invention is intended to provide the cutting method for copper-clad plate, to improve the grinding efficiency of copper-clad plate edge.
In order to achieve the above object, base case of the invention is as follows: for the cutting method of copper-clad plate, including following step
It is rapid:
Step 1: preparing a kind of cutter device, including cutting bed and cutting transport mechanism, the cutting transport mechanism include
Cutter, transfer roller and support frame, support frame as described above are fixedly mounted on the top of cutting bed, and cutter is slidably installed on the support frame,
The transfer roller horizontally rotates installation on cutting tables, and the cutting bed is equipped with cutting groove, and cutter is opposite with cutting groove；Institute
The one end for stating cutting bed is equipped with vertical discharging through slot, and the cross section for the through slot that discharges is in rectangle；It further include angle lap unit, institute
It states angle lap unit to be fixedly mounted on the lower surface of cutting bed, and angle lap unit is located at four angles of discharging through slot, the mill
Angle unit includes casing, the mixing roll ground to copper-clad plate, the shaft being vertically arranged, the bearing plate for accepting copper-clad plate, master
The motor and be used to be embedded in actively that moving gear, the first telescopic rod, the second telescopic rod, driven gear, drive driving gear rotate
The upper end of transmission gear between gear and driven gear, described sleeve pipe is fixedly connected with cutting bed, the lower end of casing and undertaking
The upper surface of plate contacts, and described sleeve pipe is equipped with mounting groove, and the upper end of shaft and the inner wall of mounting groove are rotatablely connected, under shaft
End is contacted with bearing plate, and the driven gear is coaxially fixedly mounted on the upper end of shaft, and mixing roll is fixedly mounted on vertically to be turned
On axis, the lower end of mixing roll is contacted with bearing plate；First telescopic rod and the second telescopic rod are vertically installed in casing, and
The upper end of first telescopic rod is fixedly connected with the inner wall of casing, and the lower end of the first telescopic rod and the upper surface of transmission gear rotate and connect
It connects；The upper end of second telescopic rod and the lower surface of transmission gear are rotatablely connected, the lower end of the second telescopic rod and the fixed company of bearing plate
It connects, the lower surface of the transmission gear can offset with the upper surface of mixing roll, and the lower end surface of transmission gear and mixing roll is upper
End face offsets；And driving gear, transmission gear and driven gear can be located in same level；The mixing roll is eccentrically set on
In shaft, and the outer wall of mixing roll can be located in same vertical straight line with the outer wall of casing；
Step 2: copper-clad plate to be cut being placed on cutting bed, cutter cuts copper-clad plate, covering after cutting
The length of copper sheet is 1-2cm smaller than the length for the through slot that discharges, and the width of copper-clad plate is 1-2cm smaller than the width for the through slot that discharges；It opens simultaneously
Open motor；
Step 3: copper-clad plate to be cut in Level Promoting step 2, copper-clad plate to be cut push the copper-clad plate after cutting
It is mobile to the direction of transfer roller, and then the copper-clad plate after cutting is sent to discharging through slot with the revolving speed of 5-10r/min by transfer roller
Place；
Step 4: the copper-clad plate that drops out is fallen on bearing plate at the through slot that discharges in step 3, the quadrangle of copper-clad plate respectively with
The upper surface contact of four bearing plates；Bearing plate moves down under the action of copper-clad plate gravity at this time, and the second telescopic rod pulls transmission
Gear moves down, and transmission gear is engaged with driving gear and driven gear, motor successively band driving gear, nutating gear and from
Moving gear rotation, driven gear drive shaft and mixing roll rotation, and mixing roll grinds the edge of copper-clad plate, mixing roll
Revolving speed be 50-100r/min；
Step 5: repeating step 3 and step 4, after the 10 pieces of copper-clad plates stacked on bearing plate are polished completely, close
Motor takes out the copper-clad plate being stacked on bearing plate.
The principle and its advantage of base case: 1, having prepared a kind of cutter device, and there are four angle lap lists for setting in the device
Member, angle lap unit can carry out attrition process simultaneously, the second telescopic rod during attrition process to four edges of copper-clad plate
It can be stretched, and then allow multiple copper-clad plate stackings on bearing plate, convenient for being carried out simultaneously to the edge of multiple copper-clad plates
Grinding, can be further improved the grinding efficiency of copper-clad plate edge.
2, in step 2, copper-clad plate is cut on cutting tables, cutter is opposite with cutting groove during cutting, cuts
The clast generated during cutting can enter in cutting groove, and clast is avoided to be splashed in copper-clad plate；Copper-clad plate after cutting simultaneously
Length and width be respectively less than the length and width than discharging through slot, can be logical by discharging convenient for copper-clad plate in subsequent step
Slot is fallen on bearing plate, carries out attrition process.
3, in step 3, control the transmission speed of copper-clad plate, convenient for by cutting after copper-clad plate at the uniform velocity be transferred to bearing plate
On, the edge of copper-clad plate is quickly ground.
4, in step 4, after copper-clad plate is transferred on bearing plate, the first telescopic rod and the second telescopic rod are elongated, and are convenient for
Transmission gear is engaged with driving gear and driven gear, and then mixing roll can smoothly be rotated；Simultaneous grinding roller turns
Speed is controlled effectively；Four angles of copper-clad plate are polished during this.
It 5, is that the copper-clad plate after polishing is allowed to be stacked on bearing plate, convenient for covering copper to what is stacked on bearing plate in step 5
The collection that plate is concentrated.
In conclusion in this method use a kind of cutter device, cutter device in use, can be to cutting after
Four corners of copper-clad plate carry out milled processed simultaneously, improve the grinding efficiency of copper-clad plate edge；After simultaneous grinding
Copper-clad plate can be stacked on bearing plate, and convenient for the collection concentrated to copper-clad plate, the copper-clad plate progress no longer needed to stacking is whole
Reason.
Further, accommodating chamber is equipped in the mixing roll, and the lower end of mixing roll is open, it is same in the mixing roll
Axis is equipped with surge drum, and the lower end of surge drum is fixedly connected with bearing plate, and the side wall of the surge drum is equipped with several and collects
The collection hole of cylinder connection, the outer wall of surge drum and the inner wall of accommodating chamber are slidably connected.When bearing plate moves down, surge drum is along grinding
The inner wall of roller is mobile, and the collection hole in mobile process on surge drum is exposed, the clast copper pipe after partial mill roller grinding at this time
Grinding hole enters in surge drum, can effectively reduce the amount of remaining clast in copper-clad plate, reduces the wind that copper-clad plate is scratched
Danger.
It further, further include several flabellums for allowing in accommodating chamber and forming negative pressure, the flabellum is fixedly mounted on to be located at and accommodate
In intracavitary shaft, the upper end of the surge drum is opening.When driven gear drives shaft rotation, shaft drives fan blade rotating
Dynamic, flabellum forms negative pressure by the upper end of accommodating chamber, and negative pressure is also formed in entire surge drum, so collect hole to mixing roll around
Clast is absorbed, and a large amount of clast can be quickly collected into surge drum, can further be reduced copper-clad plate and be scraped
Colored risk.
Further, the outer wall of the surge drum is equipped with several collecting boards flexible, and collecting board is respectively positioned on and collects at hole,
The collecting board is obliquely installed, and collecting board is lower than the other end of collecting board close to the one end for collecting hole.Surge drum is in mixing roll
When sliding up and down, folding or release can be carried out to collecting board flexible, when collecting board, which is not ground roller, to be blocked, collecting board prolongs
It stretches, and then the clast of grinding is oriented to, can quickly be entered in surge drum convenient for clast, convenient for being received to clast
Collection.
Further, in the step 2, the length of the copper-clad plate after cutting is 1.5cm smaller than the length for the through slot that discharges, copper-clad plate
Width than discharge through slot width it is 1.5cm small.
Further, in the step 4, the revolving speed of mixing roll is 80r/min.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cutter device in the present invention；
Fig. 2 is the cross-sectional view of angle lap unit in Fig. 1.
Specific embodiment
Below by the further details of explanation of specific embodiment:
Appended drawing reference in Figure of description includes: cutting bed 10, cutter 101, transfer roller 102, support frame 103, discharging
Through slot 104, cutting groove 105, casing 20, mixing roll 201, accommodating chamber 211, shaft 202, flabellum 203, bearing plate 30, surge drum
301, collection hole 302, collecting board 303, motor 40, driving gear 401, driven gear 402, the first telescopic rod 501, second stretch
Contracting bar 502, transmission gear 503.
Cutter device in embodiment is substantially as shown shown in Figure 1 and Figure 2: including cutting bed 10, cutting transport mechanism and
Angle lap unit, one end of cutting bed 10 are equipped with vertical discharging through slot 104, and the cross section for the through slot 104 that discharges is in rectangle；Mill
Angle element solder is on the lower surface of cutting bed 10, and angle lap unit is located at four angles of discharging through slot 104.
Cutting transport mechanism includes cutter 101, transfer roller 102 and support frame 103, and support frame 103 is welded on cutting bed 10
Top, cutter 101 is slidably mounted on support frame 103, and transfer roller 102, which horizontally rotates, to be mounted on cutting bed 10, cutting bed
10 are equipped with cutting groove 105, and the lower end of cutter 101 and cutting groove 105 are opposite.
Angle lap unit includes casing 20, the mixing roll 201 ground to copper-clad plate, the shaft 202 being vertically arranged, accepts
The bearing plate 30 of copper-clad plate, driving gear 401, the first telescopic rod 501, the second telescopic rod 502, driven gear 402, flabellum 203,
The motor 40 for driving driving gear 401 to rotate and the transmission gear for being embedded between driving gear 401 and driven gear 402
503, the upper end of casing 20 and cutting bed 10 weld, and the lower end of casing 20 contacts with the upper surface of bearing plate 30, sets on casing 20
There is mounting groove, the upper end of shaft 202 and the inner wall of mounting groove are rotatablely connected, and the lower end of shaft 202 is contacted with bearing plate 30, driven
On the upper end of shaft 202, mixing roll 201 is welded in shaft 202 402 coaxial welding of gear vertically, the lower end of mixing roll 201
It is contacted with bearing plate 30.
First telescopic rod 501 and the second telescopic rod 502 are vertically installed in casing 20, and the first telescopic rod 501 is upper
End and the inner wall of casing 20 weld, and the lower end of the first telescopic rod 501 and the upper surface of driving cog are taken turns and be rotatablely connected；First telescopic rod
501 be atmospheric pressure pole, and the second telescopic rod 502 is spring lever；The upper end of second telescopic rod 502 and the lower surface of transmission gear 503 turn
Dynamic connection, the lower end of the second telescopic rod 502 and bearing plate 30 weld, and the lower surface of transmission gear 503 can be upper with mixing roll 201
End face offsets, and the lower end surface of transmission gear 503 and the upper surface of mixing roll 201 offset；And driving gear 401, transmission gear
503 and driven gear 402 can be located at same level on.
Accommodating chamber 211 is equipped in mixing roll 201, and the lower end of mixing roll 201 is open, it is coaxial in mixing roll 201
Surge drum 301 is installed, the lower end of surge drum 301 and bearing plate 30 weld, and the side wall of surge drum 301 is equipped with several and collects
The collection hole 302 of 301 connection of cylinder, the outer wall of surge drum 301 and the inner wall of accommodating chamber 211 are slidably connected；Flabellum 203 welds in place
In in the shaft 202 in accommodating chamber 211, the upper end of surge drum 301 is opening；The outer wall of surge drum 301 is equipped with several flexibilities
Collecting board 303, and collecting board 303 be respectively positioned on collect hole 302 at, collecting board 303 is obliquely installed, collecting board 303 close to collect
The one end in hole 302 is lower than the other end of collecting board 303；Mixing roll 201 is eccentrically set in shaft 202, and mixing roll 201 is outer
Wall can be located in same vertical straight line with the outer wall of casing 20.
The present embodiment, when operation, comprising the following steps:
Step 1: preparing the cutter device in embodiment；
Step 2: copper-clad plate to be cut being placed on cutting bed 10, cutter 101 cuts copper-clad plate, after cutting
Copper-clad plate length it is 1.5cm smaller than the length for the through slot 104 that discharges, the width of copper-clad plate is smaller than the width for the through slot 104 that discharges
1.5cm；Motor 40 is opened simultaneously；
Step 3: copper-clad plate to be cut in Level Promoting step 2, copper-clad plate to be cut push the copper-clad plate after cutting
It is mobile to the direction of transfer roller 102, and then the copper-clad plate after cutting is sent to discharging with the revolving speed of 7r/min and led to by transfer roller 102
At slot 104；
Step 4: the copper-clad plate dropped out at the through slot 104 that discharges in step 3 is fallen on bearing plate 30, the quadrangle point of copper-clad plate
It is not contacted with the upper surface of four bearing plates 30；Bearing plate 30 moves down under the action of copper-clad plate gravity at this time, the second telescopic rod
502 pulling transmission gears 503 move down, and transmission gear 503 is engaged with driving gear 401 and driven gear 402, and motor 40 is successively
Band driving gear 401, nutating gear 503 and driven gear 402 rotate, and driven gear 402 drives shaft 202 and mixing roll
201 rotations, mixing roll 201 grind the edge of copper-clad plate, and the revolving speed of mixing roll 201 is 80r/min；
Step 5: when stacking copper-clad plate greater than 5 pieces on the bearing plate 30 in step 4, the second telescopic rod 502 is stretched, into
And bearing plate 30 moves down, bearing plate 30 drives collection of the surge drum 301 in 201 inner wall slide downward of mixing roll, surge drum 301
Hole 302 and collecting board 303 are no longer blocked, while shaft 202 drives flabellum 203 to rotate, and allow surge drum 301 is interior to form negative pressure,
And then collection hole 302 and collecting board 303 are oriented to the clast around mixing roll 201, make a large amount of clast quick
Be collected into surge drum 301；
Step 5: repeating step 3 and step 4, after the 10 pieces of copper-clad plates stacked on bearing plate 30 are polished completely, close
Motor 40 is closed, the copper-clad plate being stacked on bearing plate 30 is taken out.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific method and/or characteristic are herein in scheme
It does not describe excessively.It should be pointed out that for those skilled in the art, under the premise of not departing from the method for the present invention, also
Several modifications and improvements can be made, these also should be considered as protection scope of the present invention, these all will not influence of the invention real
The effect and patent practicability applied.The scope of protection required by this application should be based on the content of the claims, specification
In the records such as specific embodiment can be used for explaining the content of claim.
Claims (6)
1. being used for the cutting method of copper-clad plate, it is characterised in that: the following steps are included:
Step 1: prepare a kind of cutter device, including cutting bed and cutting transport mechanism, the cutting transport mechanism include cutter,
Transfer roller and support frame, support frame as described above are fixedly mounted on the top of cutting bed, and cutter is slidably installed on the support frame, the biography
Roller is sent to horizontally rotate installation on cutting tables, the cutting bed is equipped with cutting groove, and cutter is opposite with cutting groove；The cutting
One end of platform is equipped with vertical discharging through slot, and the cross section for the through slot that discharges is in rectangle；It further include angle lap unit, the angle lap
Unit is fixedly mounted on the lower surface of cutting bed, and angle lap unit is located at four angles of discharging through slot, the angle lap unit
The mixing roll that is ground including casing, to copper-clad plate, the shaft being vertically arranged, the bearing plate for accepting copper-clad plate, driving gear,
First telescopic rod, the second telescopic rod, driven gear, drive driving gear rotation motor and for be embedded in driving gear and from
The upper end of transmission gear between moving gear, described sleeve pipe is fixedly connected with cutting bed, the lower end of casing and the upper table of bearing plate
Face contact, described sleeve pipe are equipped with mounting groove, and the upper end of shaft and the inner wall of mounting groove are rotatablely connected, the lower end of shaft and undertaking
Plate contact, the driven gear are coaxially fixedly mounted on the upper end of shaft, and mixing roll is fixedly mounted in shaft vertically, grinding
The lower end of roller is contacted with bearing plate；First telescopic rod and the second telescopic rod are vertically installed in casing, and first is flexible
The upper end of bar is fixedly connected with the inner wall of casing, and the lower end of the first telescopic rod and the upper surface of transmission gear are rotatablely connected；Second
The upper end of telescopic rod and the lower surface of transmission gear are rotatablely connected, and the lower end of the second telescopic rod is fixedly connected with bearing plate, described
The lower surface of transmission gear can offset with the upper surface of mixing roll, and the upper surface phase of the lower end surface of transmission gear and mixing roll
It supports；And driving gear, transmission gear and driven gear can be located in same level；The mixing roll is eccentrically set on shaft
On, and the outer wall of mixing roll can be located in same vertical straight line with the outer wall of casing；
Step 2: copper-clad plate to be cut being placed on cutting bed, cutter cuts copper-clad plate, the copper-clad plate after cutting
Length it is 1-2cm smaller than the length for the through slot that discharges, the width of copper-clad plate is 1-2cm smaller than the width for the through slot that discharges；Electricity is opened simultaneously
Motivation；
Step 3: copper-clad plate to be cut in Level Promoting step 2, copper-clad plate to be cut push the copper-clad plate after cutting to biography
Send the direction of roller mobile, and then the copper-clad plate after cutting is sent at discharging through slot by transfer roller with the revolving speed of 5-10r/min；
Step 4: the copper-clad plate that drops out is fallen on bearing plate at the through slot that discharges in step 3, the quadrangle of copper-clad plate respectively with four
The upper surface of bearing plate contacts；Bearing plate moves down under the action of copper-clad plate gravity at this time, and the second telescopic rod pulls transmission gear
It moves down, transmission gear is engaged with driving gear and driven gear, and motor is successively with driving gear, nutating gear and driven tooth
Wheel rotation, driven gear drive shaft and mixing roll rotation, and mixing roll grinds the edge of copper-clad plate, and mixing roll turns
Speed is 50-100r/min；
Step 5: repeating step 3 and step 4, after the 10 pieces of copper-clad plates stacked on bearing plate are polished completely, close electronic
Machine takes out the copper-clad plate being stacked on bearing plate.
2. the cutting method according to claim 1 for copper-clad plate, it is characterised in that: be equipped in the mixing roll
Accommodating chamber, and the lower end of mixing roll is opening, is coaxially installed with surge drum, the lower end of surge drum and bearing plate in the mixing roll
It is fixedly connected, the side wall of the surge drum is equipped with several collection holes being connected to surge drum, the outer wall and accommodating chamber of surge drum
Inner wall be slidably connected.
3. the cutting method according to claim 2 for copper-clad plate, it is characterised in that: further include several allow in accommodating chamber
The flabellum of negative pressure is formed, the flabellum is fixedly mounted in the shaft in accommodating chamber, and the upper end of the surge drum is opening.
4. the cutting method according to claim 3 for copper-clad plate, it is characterised in that: set on the outer wall of the surge drum
There are several collecting boards flexible, and collecting board is respectively positioned on and collects at hole, the collecting board is obliquely installed, and collecting board is close to collection hole
One end be lower than collecting board the other end.
5. the cutting method according to claim 1 for copper-clad plate, it is characterised in that: in the step 2, after cutting
The length of copper-clad plate is 1.5cm smaller than the length for the through slot that discharges, and the width of copper-clad plate is 1.5cm smaller than the width for the through slot that discharges.
6. the cutting method according to claim 1 for copper-clad plate, it is characterised in that: in the step 4, mixing roll
Revolving speed is 80r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711139095.5A CN107931697B (en) | 2017-11-16 | 2017-11-16 | Cutting method for copper-clad plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711139095.5A CN107931697B (en) | 2017-11-16 | 2017-11-16 | Cutting method for copper-clad plate |
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| CN107931697A CN107931697A (en) | 2018-04-20 |
| CN107931697B true CN107931697B (en) | 2019-02-22 |
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| CN201711139095.5A Active CN107931697B (en) | 2017-11-16 | 2017-11-16 | Cutting method for copper-clad plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110281300B (en) * | 2019-06-20 | 2020-11-20 | 上海银沪通信科技有限公司 | Copper-clad plate cutting machine for electronic product circuit board and cutting method thereof |
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| CN206263726U (en) * | 2016-10-28 | 2017-06-20 | 衢州顺络电路板有限公司 | A kind of angle rounding machine for pcb board production |
| CN107160257A (en) * | 2017-07-11 | 2017-09-15 | 信丰迅捷兴电路科技有限公司 | A kind of round-corner cutter and fillet method for grinding for printed substrate |
| CN107322404A (en) * | 2017-07-26 | 2017-11-07 | 江苏康美新材料科技有限公司 | A kind of calcium silicate board multi-angle edging device |
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|---|---|
| CN107931697A (en) | 2018-04-20 |
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