WO2008144969A1 - A cutting device for a prepreg sheet and the method therefor - Google Patents

A cutting device for a prepreg sheet and the method therefor Download PDF

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Publication number
WO2008144969A1
WO2008144969A1 PCT/CN2007/002474 CN2007002474W WO2008144969A1 WO 2008144969 A1 WO2008144969 A1 WO 2008144969A1 CN 2007002474 W CN2007002474 W CN 2007002474W WO 2008144969 A1 WO2008144969 A1 WO 2008144969A1
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WO
WIPO (PCT)
Prior art keywords
cutting
sheet
cut
laser
human
Prior art date
Application number
PCT/CN2007/002474
Other languages
English (en)
French (fr)
Inventor
Yunfeng Gao
Chao Yan
Xingquan Zhang
Guodong Chen
Qingbei Zeng
Original Assignee
Shenzhen Han's Laser Technology Co., Limited
Shenzhen Han's Cnc Science And Technology Co., Limited
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
Publication date
Application filed by Shenzhen Han's Laser Technology Co., Limited, Shenzhen Han's Cnc Science And Technology Co., Limited filed Critical Shenzhen Han's Laser Technology Co., Limited
Priority to JP2010509652A priority Critical patent/JP2010528863A/ja
Publication of WO2008144969A1 publication Critical patent/WO2008144969A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/40—Removing material taking account of the properties of the material involved
    • B23K26/402—Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0042—Devices for removing chips
    • B23Q11/0046—Devices for removing chips by sucking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2215/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B2215/006—Suction tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/30—Organic material
    • B23K2103/42—Plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26

Definitions

  • the present invention relates to a cutting apparatus and method therefor, and in particular to a cutting apparatus for a PP sheet (prepreg film). Background technique
  • the wiring board is composed of an insulating carrier between a plurality of copper foil wires and a copper foil wire, and the carrier is a PP sheet (Prepreg film). In the process of manufacturing a circuit board, it is generally necessary to cut the PP sheet.
  • the PP sheet is composed of a combination of glass fiber or other fiber 91 and a gel (e.g., resin) 92.
  • the cutting method of the PP sheet is mainly: placing the rolled PP sheet on a special device, and then cutting the PP sheet into a certain shape with a blade. 'In the cutting process, the position of the cut of the PP sheet will appear as powder removal (dispersion powder) and wire removal (fiber).
  • these powder stripping and wire stripping tend to be trapped in the board, causing a gap between the board layer and the layer.
  • the connection between each layer of the circuit board is as follows: first drilling a hole on the circuit board, then plating a layer of copper on the hole wall, and copper of the upper and lower printed circuit boards can be realized through the copper layer Electrical connection of the foil.
  • the copper foil 72 and the copper foil 73 are electrically connected to each other, but the existence of the slit due to powder removal and/or wire removal cannot be achieved between the copper foil 71 and the copper foil 72. Electrical connections.
  • the method for solving the powder removal and the wire removal is to stack the cut PP sheets together, first blow them off with a wind gun, and then use a special infrared edge banding machine to heat the edges and seal the edges. Because during the whole process of cutting, there will be powder removal and wire removal. When cleaning with a air gun, some of the more concealed places may not be able to blow. Second, during the blowing process, the dust will spread to the air. In the middle, it may reattach to the PP sheet, causing secondary contamination of the PP sheet. Before the edge is sealed, it is blown clean with a wind gun. The powder may also fall off at any time. Once the powder and/or wire enters the interlayer of the circuit board, the circuit board is bound to be scrapped.
  • the stacking of the circuit board is required to be high, and the stacked edges are neat, otherwise the outer side is scorched, and the side that is shrunk inside is not baked, and the edge is not covered. Requirements.
  • the stacked PP sheets are sealed by infrared rays, it is easy to put the PP sheets.
  • the layers are glued together and if they are forcibly separated, the thickness of the edges will be uneven. It can be seen that the current method for solving the powder removal and the wire removal not only adds one piece of equipment, but also the operation process is cumbersome, resulting in an increase in production cost. As the accuracy, density, and number of layers of the circuit board continue to increase, it becomes more and more urgent to solve the problem of powder removal and wire removal. Summary of the invention
  • the present invention provides a simultaneous operation. Cutting and edge sealing and fully automatic production of PP sheet cutting equipment.
  • a PP sheet cutting device comprising: a main frame having a PP sheet transmission mechanism; a work table disposed on the main frame; a loading mechanism disposed upstream of the work table, and a human-machine interaction interface control system, the work
  • the stage includes a laser and a cutting head for receiving a laser beam of the laser output and forming a cutting beam.
  • the loading mechanism includes: a loading shaft for supporting a pre-cut PP sheet roll; a relay roller configured to change a PP sheet driving direction, and a diastolic adjustment for adjusting a PP sheet relaxation degree
  • the mechanism, the diastolic adjustment mechanism includes: a fixed rotating shaft; a flail rotating around the fixed rotating shaft; and a movable rotating shaft disposed on the connecting rod.
  • the dilation adjustment mechanism further includes a limit mechanism that limits the range of rotation of the link.
  • the main frame, the table, and the loading mechanism are coupled to form an integrated structure
  • the cutting apparatus further includes a blanking mechanism movable relative to the main frame.
  • the PP sheet transmission mechanism is a roller transmission mechanism disposed on at least one side of the worktable, and the roller transmission mechanism includes: an active compression roller, a driven compression roller, and a transmission for adjusting the main perpendicular to the PP sheet.
  • the drive direction of the mechanism drives the cutting head drive mechanism of the cutting head.
  • the table further comprises air for generating a purge stream
  • the compression device the air compression device is in communication with the cutting head, and the cutting head directs the purge airflow to the surface of the PP sheet.
  • the table further comprises a vacuum suction device.
  • the vacuum suction device is disposed directly below the cutting head and has an elongated suction port that coincides with the direction of transmission of the cutting head.
  • the human-machine interface control system includes: a human-machine interaction interface, a controller connected to the human-machine interface, and a servo control system and a laser control system respectively connected to the controller.
  • the table comprises at least two cutting heads, the at least two cutting heads being disposed on a same line or corresponding parallel line perpendicular to the direction of transmission of the PP sheet drive.
  • a PP sheet cutting method comprising the steps of: a. feeding a pre-cut PP sheet and performing diastolic adjustment; b. driving the pre-cut PP sheet in a side of the crucible; c. guiding the laser beam And cutting the pre-cut PP sheet; d. driving the laser beam in a second direction perpendicular to the first direction to obtain a strip-shaped cut PP sheet.
  • step b a plurality of laser beams are directed to act and the pre-cut PP sheet is cut to effect a plurality of cuts of the pre-cut PP sheet.
  • the plurality of laser beams are obtained by a beam splitting device or a plurality of corresponding lasers.
  • the cutting method further comprises obtaining a cutting parameter through a human-machine interface.
  • an integrated PP sheet laser cutting device and a cutting method are provided, which not only avoids the phenomenon of powder removal and wire stripping during the cutting process of the PP sheet, but also realizes automatic cutting and reduces the production cost.
  • 1 is a schematic structural view of a conventional PP sheet
  • 2 is a schematic structural view of a circuit board formed by a PP sheet cut by a conventional method
  • FIG. 3 is a schematic structural view of an embodiment of a PP sheet cutting device of the present invention.
  • Figure 4 is a schematic structural view of a workbench of the present invention.
  • Figure 5 is a partial enlarged view of a portion I in Figure 4.
  • Figure 6 is a schematic structural view of another embodiment of the PP sheet cutting device of the present invention.
  • FIG. 7 is a schematic block diagram of a human-machine interface control system of the present invention.
  • Figure 8 is a flow chart showing the operation of the PP sheet cutting apparatus of the present invention. detailed description
  • the PP sheet cutting apparatus of the present invention comprises a main frame 2, a work table 1 disposed on the main frame 2, and a loading mechanism 3 disposed upstream of the table 1. Workbench 1, main frame 2, loading mechanism 3 join to form an integrated structure.
  • the cutting device further includes a human-machine interface control system for controlling and coordinating the actions of the components according to user setting parameters to realize automatic cutting of the PP sheet.
  • the main frame 2 is equipped with a PP sheet transmission mechanism.
  • the PP sheet transmission mechanism is a roller transmission mechanism disposed on at least one side of the table 1.
  • the roller transmission mechanism includes: an active pressure roller 23, a driven pressure roller 22, and an adjustment pressure roller 23 and a pressure regulating mechanism 21 that presses the relative pressure between the pinch rollers 22.
  • the active pinch roller 23 is connected to the servo motor via a belt or similar transmission mechanism.
  • the stage 1 includes a laser 11 for generating an appropriate wavelength and energy density; a cutting head 12 for receiving a laser beam output from the laser 11 and forming a cutting beam; and cutting the cutting head 12 perpendicular to the transmission direction of the PP sheet transmission mechanism Head drive mechanism (not shown).
  • the cutting head 12 is linearly moved along the horizontal (or vertical) guide by the servo motor, thereby achieving lateral cutting of the PP sheet.
  • the laser 11 is a C0 2 laser, and preferably a laser having a wavelength of 9.4 ⁇ m.
  • the loading mechanism 3 includes a loading shaft 30 for supporting the pre-cut skein roll 4; an appropriate number of relay rollers 31 arranged to change the direction of the cymbal drive, and a diastolic adjustment mechanism 32 for adjusting the degree of dilation of the cymbals .
  • the diastolic adjustment mechanism 32 includes: a fixed fixed shaft 321; a link 322 that rotates about the fixed shaft 321; and a movable shaft 323 that is disposed on the link 322.
  • the loading shaft 30 can control its damping by a suitable braking mechanism.
  • the dilation adjustment mechanism 32 further includes a limit mechanism 324 that limits the range of rotation of the link 322.
  • the PP sheet roll 4 is first loaded on the loading shaft 30, and the PP sheet is transferred to the main frame through the relay roller 31 on the loading mechanism 3 and the movable rotating shaft 323 of the diastolic adjustment mechanism 32.
  • the roller drive mechanism on 2 ensures the timely supply of PP sheets. Sufficient friction is generated between the active pinch roller 23, the driven pinch wheel 22 and the PP sheet.
  • the steady feeding of the PP sheet is realized by the driving of the active pressing wheel 23.
  • the PP sheet reaches the cutting position of the table 1 during conveyance, and the cutting beam output from the cutting head 12 is longitudinally cut.
  • the cut PP sheet material falls on the unloading mechanism (not shown).
  • the unloading mechanism is movable relative to the main frame 2 to facilitate transporting the cut PP sheet material.
  • the cutting head 12 is internally provided with a cavity 121 in which a focusing mirror 122 is disposed, through which a laser beam directed through the focusing mirror 122 is focused by a suitable guiding mechanism or directly input to the cutting head 12. The focus is then focused on the cutting position of the table 1, thereby cutting the passing PP sheet.
  • An air blowing pipe 123 is provided at one side of the inner cavity 121 of the cutting head 12, and the air blowing pipe 123 is located between the focusing mirror 122 and the laser beam exit of the cutting head 12.
  • the blow pipe 123 is connected to an air compressing device (not shown).
  • the purge gas stream generated by the air compressing device is blown toward the focal point of the laser beam of the cutting head 12 by the air blowing pipe 123, that is, the slit of the PP sheet.
  • An air flow regulating valve 124 is also provided on the air blowing pipe 123 for adjusting the size of the air flow. Since the blowing pipe 123 is located between the focusing mirror 122 and the laser beam outlet of the cutting head 12, after the purging airflow generated by the air compressing device is blown into the inner cavity 121 of the cutting head 12 through the blowing pipe 123, it can only flow to the cutting head 12.
  • the position of the exit of the laser beam due to the high pressure of the airflow, causes the dust generated at the slit of the PP sheet to enter the inner cavity 121 of the cutting head 12 against the flow direction of the high pressure airflow, thereby ensuring that the focusing mirror 122 is not contaminated.
  • the air compressing means may be disposed at other positions of the table 1 in other suitable manners to purify the soot and carbon black generated at the slit.
  • a negative pressure type dust suction device 13 is further provided in the table 1.
  • the vacuum suction device 13 is disposed directly below the cutting head 12 and has an elongated suction port 131 that coincides with the direction in which the cutting head is driven.
  • a dust suction pipe 132 is provided on the opposite side of the dust suction port 131.
  • the dust suction port 131 sucks away the smoke and carbon black generated at the slit of the PP sheet.
  • the suction port 131 can also fix the PP sheet to be cut to an appropriate position, ensuring that the position of the PP sheet does not change during the transverse cutting.
  • at least two cutting heads 12 are disposed on the table 1.
  • the plurality of cutting heads 12 are disposed on the same straight line perpendicular to the driving direction of the PP sheet, and receive the laser beam output by the respective lasers from a laser or through the light guiding mechanism through the light splitting mechanism, thereby realizing the PP sheet. Multiple cuts.
  • the plurality of cutting heads 12 can also be respectively disposed on different corresponding parallel straight lines perpendicular to the direction in which the PP sheets are driven, and receive laser beams from respective lasers. The advantages of this structure are: avoiding the use of higher power lasers and complex spectroscopic mechanisms, ensuring the cutting strength of each cutting head while facilitating the lateral cutting of different cutting heads.
  • the position and spacing of the cutting head 12 can be set according to the width of the raw material of the PP sheet and the width of the desired PP sheet. Since a plurality of cutting heads 12 work simultaneously, it is ensured that the efficiency is high when performing a large number of cuttings.
  • the PP sheet slit is automatically sealed by the high temperature of the laser beam, and the incision powder removal and wire removal are completely eliminated.
  • the laser beam is fine, the energy is concentrated, and the damage around the slit of the PP sheet is small.
  • the air compression device when the laser beam is cut, the purging airflow generated by the device rushes toward the slit of the PP sheet, and the airflow can cause the PP sheet slit to be rapidly cooled by the high temperature at the moment of leaving the laser beam. The process causes the exposed glass filaments to quench and become brittle. Then, the brittle glass filaments are broken and detached by the force generated by the gas flow to achieve enhanced separation. In addition, the airflow blows off the hot-melt resin at the slit to prevent it from re-adhesive after cooling, and the airflow prevents the PP sheet from burning in the laser beam and enlarges the slit.
  • the dust suction device When the laser beam is cut, the dust suction device can suck away the dust and carbon black of the slit to avoid staining the PP sheet, and at the same time, it does not pollute the environment.
  • the negative pressure generated by the suction port can fix the PP piece to the position of the suction port during the transverse cutting process, which can ensure that the position of the PP piece does not change during cutting, and it is convenient to fix the focus of the laser beam to the PP piece. Cutting position.
  • FIG. 7 is a schematic block diagram of a human-machine interface control system of the present invention.
  • the human-machine interface control system in the PP sheet cutting device of the present invention comprises: a human-computer interaction interface (picture 1), a controller, a servo control system, and a laser control system.
  • the human-computer interaction interface uses a touch screen
  • the controller uses a programmable logic controller (PLC).
  • PLC programmable logic controller
  • the servo control system can control the switch, rotation direction, rotation speed and displacement of the relevant servo motor (for example, the active pinch wheel servo motor and the cutting head drive servo motor) through the servo amplifier and the pulse generator.
  • the transmission of the components for example, the active pinch wheel servo motor and the cutting head drive servo motor.
  • the laser control system can transmit control signals to the corresponding lasers through the laser communication I/O board and control the switching and power (energy control) of the laser.
  • the laser control system can also further include a laser cooling system.
  • the human-machine interface control system may also include an alarm, emergency stop control system.
  • Figure 8 is a flow chart showing the operation of the PP sheet cutting apparatus of the present invention.
  • the user controls the entire cutting process through the human-computer interaction interface control system.
  • various cutting parameters such as the spacing of the cutting head 12, are set through the human-machine interaction interface under the premise of ensuring that no alarm signal occurs. (transverse cutting width) and longitudinal cutting length, corresponding PP part number, actual cutting speed, coiling speed, laser power, laser operating temperature.
  • the laser-related parameters are passed to the corresponding laser via the laser communication I/O board or directly to the laser cooling system.
  • the servo parameters related to the pitch, length, speed, etc. are transmitted to the corresponding servo motor through the servo control system.
  • the PLC reset button is started, and the PLC initially positions the starting position of each cutting head according to the corresponding cutting parameters.
  • the PP sheet drive mechanism advances the PP sheet, and at the same time all the cutting heads 12 work together under the control of the program to complete the longitudinal cutting of the PP sheet, and then the PP sheet transmission mechanism stops the transmission. All of the cutting heads 12, or a predetermined number of cutting heads 12 therein, are moved laterally by the cutting head drive mechanism to complete the transverse cutting of the PP sheets, thereby cutting the PP sheets into strips of predetermined length and width.
  • the zero reset is performed after the cutting is completed, and this is repeated.
  • the control system can also count the cumulative working time of the laser, single-cutting function, debugging the laser, counting the working time of each group, alarming the abnormal state of water temperature, 7] pressure, air pressure, servo, etc. Emergency stop control.

Description

一种 PP片切割设备及其方法
技术领域
本发明涉及一种切割设备及其方法，具体涉及一种 PP片 （prepreg胶片） 的切割设备。 背景技术
线路板是由多层铜箔线和铜箔线之间的绝缘载体共同构成的， 这种载体 就是 PP片 （Prepreg胶片）。 在制造线路板的过程中， 一般需要对 PP片进行 切割。
请参阅图 1 , PP片由玻璃纤维或其它纤维 91和胶质 (例如， 树脂） 92组 合而成。 目前对 PP片的切割方式主要是： 将成卷的 PP片放置于专用设备上， 再用刀片将 PP片切割成一定的形状。'在切割过程中， PP片的切口位置会出现 脱粉 (碎胶粉 )和脱丝 (纤维丝 )现象。
请参阅图 2 , 这些脱粉和脱丝往往会夹在线路板中 ,造成线路板层与层之 间的离缝。 在制作多层线路板时， 每层线路板之间的连接方式是： 先在线路 板上钻孔， 然后在孔壁电镀上一层铜， 通过铜层可实现上、 下层印刷电路基 板的铜箔的电气连接。 如图 1所示， 在正确情况下， 铜箔 72和铜箔 73彼此 电气连接， 但由于脱粉和 /或脱丝所导致的离缝的存在， 铜箔 71和铜箔 72之 间无法实现电气连接。
目前解决脱粉和脱丝的方法是将切割好的 PP片叠放在一起， 先用风枪吹 干净， 再用一台专用红外线封边机， 给切边加热封边。 由于在切割的整个过 程中， 都会有脱粉和脱丝现象， 用风枪吹风进行清洁时， 一是有些比较隐蔽 的地方可能吹不到， 二是在吹的过程中， 粉尘会散布到空气中， 有可能会重 新附着在 PP片上， 造成对 PP片的二次污染。 在封边前， 即使用风枪吹干净 了，.粉也随时都有脱落的可能， 一旦粉和 /或丝进入线路板的夹层中， 势必会 造成线路板报废。 而且， 在进行封边时对线路板的叠放要求较高， 叠放的边 要整齐， 否则伸在外面的边烤焦了， 而缩在里面的边烤不到， 达不到全部封 边的要求。 另外， 在利用红外线对叠放的 PP片进行封边时， 很容易把 PP片 的层与层之间胶结在一起， 如果强行分开， 会造成边缘的厚薄不均。 由此可见， 目前解决脱粉和脱丝的方法不仅增加了一台设备， 而且操作 过程繁瑣， 造成生产成本的增加。 随着线路板的精度、 密度、 层数的不断提 高， 解决脱粉和脱丝的问题显得越来越紧迫。 发明内容
为了解决现有技术中由于 PP片采用刀片切割会产生脱粉和脱丝现象， 导 致需要增加后续封边工序以及封边设备， 造成生产成本增加的技术问题， 本 发明提供了一种能够同时进行切割及封边并且可实现全自动生产的 PP片切割 设备。
本发明解决解决现有技术中由于 PP片采用刀片切割会产生脱粉和脱丝现 象， 导致需要增加后续封边工序以及封边设备， 造成生产成本增加的技术问 题所采用的技术方案是： 提供一种 PP片切割设备， 该切割设备包括： 具有 PP 片传动机构的主机架； 设置在主机架上的工作台； 设置在工作台上游的上料 机构， 以及人机交互界面控制系统， 该工作台包括激光器以及用于接收激光 器输出的激光光束并形成切割光束的切割头。
根据本发明一优选实施例， 上料机构包括： 用于支撑预切割 PP片料卷的 上料轴； 设置为改变 PP片传动方向的中继滚轮， 以及用于调节 PP片舒张程度 的舒张调节机构， 舒张调节机构包括： 固定转轴； 绕固定转轴转动的连杵， 以及设置在连杆上的活动转轴。
根据本发明一优选实施例， 舒张调节机构进一步包括限制连杆的转动范 围的限位机构。
根据本发明一优选实施例， 主机架、 工作台以及上料机构联结形成一体 化结构， 切割设备进一步包括可相对主机架移动的下料机构。
根据本发明一优选实施例， PP片传动机构为设置在工作台至少一侧的滚 轮传动机构， 滚轮传动机构包括： 主动压紧轮、 从动压紧轮以及用于调节主 垂直于 PP片传动机构的传动方向传动切割头的切割头传动机构。
根据本发明一优选实施例， 工作台进一步包括用于产生吹扫气流的空气 压缩装置， 空气压缩装置与切割头连通， 并由切割头将吹扫气流导引 '到 PP片 表面。
根据本发明一优选实施例 , 工作台进一步包括负压式吸尘装置。
根据本发明一优选实施例， 负压式吸尘装置设置在切割头的正下方并具 有与切割头的传动方向一致的长条形吸尘口。
根据本发明一优选实施例， 人机交互界面控制系统包括： 人机交互界面， 与人机交互界面连接的控制器以及分别与控制器连接的伺服控制系统和激光 控制系统。 '
根据本发明一优选实施例， 工作台上包括至少两个切割头， 至少两个切 割头设置在垂直于 PP片传动机构的传动方向的同一直线上或对应平行直线 上。
本发明解决解决现有技术中由于 PP片采用刀片切割会产生脱粉和脱丝现 象， 导致需要增加后续封边工序以及封边设备， 造成生产成本增加的技术问 题所采用的另一技术方案是： 提供一种 PP片切割方法， 该切割方法包括以下 步骤： a. 给入预切割 PP片并进行舒张度调节； b. 在笫一方向上传动预切割 PP片； c. 导引激光束作用并切割预切割 PP片； d. 在垂直第一方向的第二方 向上传动激光束以获取条形切割 PP片。 '
根据本发明一优选实施例， 在步骤 b中， 导引多束激光束作用并切割预切 割 PP片以实现预切割 PP片的多条切割。
根据本发明一优选实施例， 多束激光束通过分光装置或多个对应激光器 获得。
根据本发明一优选实施例， 切割方法进一步包括通过人机交互界面获取 切割参数。
通过上述结构和方法， 提供一种一体化 PP片激光切割设备及切割方法， 不仅避免了 PP片切割过程中的脱粉和脱丝现象， 并实现了自动化切割， 降低 了生产成本。 附图说明
图 1是现有 PP片的结构示意图; 图 2是由现有方式切割的 PP片所构成的电路板的结构示意图；
图 3是本发明的 PP片切割设备一实施例的结构示意图；
图 4是本发明的工作台的结构示意图；
图 5是图 4中 I部分的局部放大图；
图 6是本发明的 PP片切割设备另一实施例的结构示意图；
图 7是本发明的人机交互界面控制系统的示意框图；
图 8是本发明的 PP片切割设备的工作流程图。 具体实施方式
如图 3所示， 本发明的 PP片切割设备包括主机架 2、 设置在主机架 2上的工 作台 1、 设置在工作台 1上游的上料机构 3。 工作台 1、 主机架 2、 上料机构 3联 结形成一体化结构。 此外， 该切割设备还进一步包括人机交互界面控制系统， 以便根据用户设定参数控制并协调各部件的动作， 以实现 PP片的自动化切割。
主机架 2上装有 PP片传动机构。 在本实施例中， PP片传动机构为设置在工 作台 1至少一侧的滚轮传动机构， 该滚轮传动机构包括： 主动压紧轮 23、 从动 压紧轮 22以及用于调节主动压紧轮 23和从动压紧轮 22之间的相对压力的压力 调节机构 21。 主动压紧滚轮 23通过皮带或类似传动机构与伺 良电机相连。
工作台 1包括用于产生适当波长以及能量密度的激光器 11; 用于接收激光 器 11输出的激光光束并形成切割光束的切割头 12； 以及垂直于 PP片传动机构 的传动方向传动切割头 12的切割头传动机构（未图示）。 在本实施例中， 切割 头 12通过伺服电机带动可以沿水平 （或竖直）导轨作直线运动， 由此实现 PP 片的横向切割。 在本实施例中， 激光器 11采用 C02激光器， 并优选采用波长 9. 4 μ ιη的激光。
上料机构 3包括用于支撑预切割 ΡΡ片料卷 4的上料轴 30; 设置为改变 ΡΡ片 传动方向的适当数量的中继滚轮 31 , 以及用于调节 ΡΡ片舒张程度的舒张调节 机构 32。 舒张调节机构 32包括： 位置固定的固定转轴 321 ; 绕固定转轴 321转 动的连杆 322; 以及设置在连杆 322上的活动转轴 323。 上料轴 30可通过适当制 动机构控制其阻尼。 此外， 舒张调节机构 32进一步包括限制连杆 322的转动范 围的限位机构 324。 在 PP片的上料过程中， 首先把 PP片料卷 4装在上料轴 30上， PP片经过上料 机构 3上的中继滚轮 31以及舒张调节机构 32的活动转轴 323传送到主机架 2上 的滚轮传动机构， 由此保证 PP片的及时供给。 得主动压紧轮 23、 从动压紧轮 22和 PP片之间产生足够的摩擦力。 主动压紧轮 轮 23的带动下实现 PP片的稳定进给。 PP片在传送过程中到达工作台 1的切割位 置， 由切割头 12输出的切割光束进行纵向切割。 切下的 PP片材料落在下料机 构（未图示）上面。 下料机构是可以相对主机架 2移动的， 以便于将切好的 PP 片材料运走。
如图 4和图 5进一步显示的， 切割头 12内部设置有内腔 121 , 内腔 121内设 置有聚焦镜 122 , 经适当导引机构或直接输入到切割头 12的激光经过聚焦镜 122的聚焦后聚焦在工作台 1的切割位置， 由此对经过的 PP片的进行切割。 在 切割头 12的内腔 121的一侧设置有吹气管 123 , 并且吹气管 123位于聚焦镜 122 与切割头 12的激光束出口之间。 该吹气管 123与空气压缩装置（未图示）相连 通。 空气压缩装置产生的吹扫气流通过吹气管 123吹向切割头 12的激光束的焦 点， 也就是 PP片的切口。 吹气管 123上还设置有气流调节阀 124用来调节气流 的大小。 由于吹气管 123位于聚焦镜 122与切割头 12的激光束出口之间， 在空 气压缩装置产生的吹扫气流通过吹气管 123吹入切割头 12的内腔 121后， 只能 流向切割头 12的激光束出口的位置， 由于该气流的高压作用， 使得 PP片的切 口处产生的灰尘不会逆着高压气流的流向而进入切割头 12的内腔 121 , 从而保 证了聚焦镜 122不会被污染。 此外， 空气压缩装置还可以以其它适当方式设置 在工作台 1的其它位置， 以便对切口处产生的烟尘、 碳黑进行吹扫。
工作台 1中还进一步设置有负压式吸尘装置 13。 在本实施例中， 负压式吸 尘装置 13设置在切割头 12的正下方并具有与切割头传动方向一致的长条形吸 尘口 131。 吸尘口 131的相对侧设置有吸尘管 132。 在切割过程中， 吸尘口 131 将 PP片切口处产生的烟尘、 碳黑吸走。 此外， 在切割头 12的横向切割过程中， 吸尘口 131还可以将要进行切割的 PP片固定到适当位置， 确保横向切割过程中 PP片的位置不会发生变化。 如图 6所示， 工作台 1上设置有至少两个切割头 12。 在本实施例中， 该多 个切割头 12设置在垂直于 PP片传动方向的同一条直线上， 通过分光机构从一 个激光器或通过导光机构接收各自激光器输出的激光光束， 由此实现 PP片的 多条切割。 然而， 该多个切割头 12还可以分别设置在垂直于 PP片传动方向的 不同对应平行直线上， 并从各自对应的激光器接收激光光束。 这种结构的优 点在于： 避免使用了更高功率的激光器以及复杂的分光机构， 保证了各切割 头的切割强度， 同时便于不同切割头的横向切割。
在将 PP片切割成矩形时， 可以根据 PP片的原材料的宽度以及所需 PP片的 宽度设置切割头 12的位置以及间距。 由于多个切割头 12同时工作， 从而保证 了在进行大量切割时具有较高的效率。
采用本发明的切割设备在对 PP片进行切割加工时， 由于激光束高温作用 使 PP片切口自动封上边， 并彻底杜绝切口脱粉和脱丝。 另外， 由于激光束 ^[艮 细， 能量集中， 对 PP片切口周围的破坏很小。
此外， 由于采用空气压缩装置， 在激光束进行切割时， 该装置产生的吹 扫气流冲向 PP片的切口， 该气流可以使 PP片切口在离开激光束的瞬间， 由高 温迅速冷却， 这一过程使棵露在外的玻璃丝淬火， 变脆。 然后， 利用气流的 所产生的力量使变脆的玻璃丝断裂并脱落， 达到强化分离作用。 除此之外， 气流将切口处热熔的树脂吹掉， 防止其冷却后重新粘连， 气流还可以防止 PP 片在激光束中发生燃烧， 使切口变大。
在激光束进行切割时， 吸尘装置可以将切口的烟尘、 碳黑吸走， 避免污 染 PP片， 同时， 也不会污染环境。 另外， 吸尘口产生的负压可以在横向切割 过程中将 PP片固定于吸尘口的位置， 可以保证在切割时， PP片位置不会发生 变化， 便于将激光束的焦点固定于 PP片的切割位置。
如图 7所示， 图 7是本发明的人机交互界面控制系统的示意框图。 在本发 明的 PP片切割装置中的人机交互界面控制系统包括： 人机交互界面 （画 1 )、 控制器、 伺服控制系统以及激光控制系统。 在本实施例中， 人机交互界面采 用触摸屏， 控制器则采用可编程逻辑控制器 （PLC )。 伺服控制系统可通过伺 服放大器以及脉冲发生器控制相关伺服电机（例如， 主动压紧轮伺服电机、 切割头传动伺服电机） 的开关、 转动方向、 转速以及位移量， 由此实现各种 部件的传动。 激光控制系统则可以通过激光器通信 I/O板将控制信号传递到相 应激光器， 并控制激光器的开关以及功率（能量控制）。 激光控制系统还可以 进一步包括激光器冷却系统。 人机交互界面控制系统还可以包括报警、 急停 控制系统。
图 8是本发明的 PP片切割设备的工作流程图。 在切割过程中， 用户通过人 机交互界面控制系统对整个切割过程进行控制， 首先， 在确保没有任何报警 信号发生的前提下， 通过人机交互界面设置各种切割参数， 例如切割头 12的 间距（横向切割宽度） 以及纵向切割长度、 相应 PP料号、 实际切割速度、 卷 料速度、 激光功率、 激光器工作温度。 其中与激光器相关的参数通过激光器 通信 I/O板传递给相应的激光器或者直接传递给激光器冷却系统。 而与间距、 长度、 速度等相关的伺服参数则通过伺服控制系统传送给相应的伺服电机。 然后， 启动 PLC回零按键， PLC即按照对应的切割参数初始定位各个切割头的 起始位置。 随后， 在启动 PLC自动切割按键之后， PP片传动机构推进 PP片， 同 时所有切割头 12在程序的控制下一起工作， 完成对 PP片的纵向切割， 随后 PP 片传动机构停止传动。 所有切割头 12或者其中预定数量的切割头 12在切割头 传动机构的带动下横向运动， 完成对 PP片的横向切割， 由此将 PP片切割成预 定长度和宽度的条形材料。 在切割完成后进行零点复位， 以此反复。 此外， 控制系统还可以统计激光器的累计工作时间， 单切一次功能， 对激光器进行 调试， 每组工作过程时间统计， 对水温、 7]压、 气压、 伺服等的不正常状态 报警， 对设备进行急停控制。
在上述实施例中， 仅对本发明进行了示范性描述， 但是本领域技术人员 在不脱离本发明所保护的范围和精神的情况下， 可才艮据不同的实际需要设计 出各种实施方式。

Claims

权 利 要 求
1. 一种 PP片切割设备， 其特征在于： 所述切割设备包括：
具有 PP片传动机构的主机架；
设置在所述主机架上的工作台， 所述工作台包括：
激光器；
用于接收所述激光器输出的激光光束并形成切割光束的切割头； 以及 设置在所述工作台上游的上料机构， 以及
人机交互界面控制系统。 -
2. 根据权利要求 1所述的切割设备， 其特征在于： 所述上料机构包括： 用于支撑预切割 PP片料卷的上料轴；
设置为改变 PP片传动方向的中继滚轮， 以及
用于调节 PP片舒张程度的舒张调节机构， 所述舒张调节机构包括： 固定转 轴； 绕所述固定转轴转动的连杆； 以及设置在所述连杆上的活动转轴。
3. 根据权利要求 2所述的切割设备， 其特征在于： 所述舒张调节机构进一 步包括限制所述连杆的转动范围的限位机构。
4. 根据权利要求 1、 2或 3所述的切割设备， 其特征在于： 所述主机架、 所 述工作台以及所述上料机构联结形成一体化结构， 所述切割设备进一步包括可 相对所述主机架移动的下料机构。
5. 根据权利要求 1所述的切割设备， 其特征在于： 所述 PP片传动机构为设 置在所述工作台至少一侧的滚轮传动机构， 所述滚轮传动机构包括： 主动压紧 轮、 从动压紧轮以及用于调节所述主动压紧轮和所述从动压紧轮之间的相对压 力的压力调节机构，.所述工作台进一步包括垂直于所述 PP片传动机构的传动方 向传动所述切割头的切割头传动机构。
6. 根据权利要求 5所述的切割设备， 其特征在于： 所述工作台进一步包括 用于产生吹扫气流的空气压缩装置， 所述空气压缩装置与所述切割头连通， 并 由所述切割头将所述吹扫气流导引到 PP片表面。
7. 根据权利要求 5所述的切割设备， 其特征在于： 所述工作台进一步包括 负压式吸尘装置。 '
8. 根据权利要求 7所述的切割设备， 其特征在于： 所述负压式吸尘装置设 置在所述切割头的正下方并具有与所述切割头的传动方向一致的长条形吸尘 口。
9. 根据权利要求 1所述的切割设备， 其特征在于： 所述人机交互界面控制 系统包括： 人机交互界面， 与所述人机交互界面连接的控制器以及分别与所述 控制器连接的伺服控制系统和激光控制系统。
10. 根据权利要求 1所述的切割设备， 其特征在于： 所述工作台上包括至少 两个切割头， 所述至少两个切割头设置在垂直于所述 PP片传动机构的传动方向 的同一直线上或对应平行直线上。
11. 一种 PP片切割方法， 其特征在于： 所述切割方法包括以下步骤： a. 给入预切割 PP片并进行舒张度调节；
b. 在第一方向上传动所述预切割 PP片；
c 导引激光束作用并切割所述预切割 PP片；
d. 在垂直所述第一方向的第二方向上传动所述激光束以获取条形切割 PP 片。
12. 根据权利要求 11所述的切割方法， 其特征在于： 在所述步骤 b中， 导引 多束激光束作用并切割所述预切割 PP片以实现所述预切割 PP片的多条切割。
13. 根据权利要求 12所述的切割方法， 其特征在于： 所述多束激光束通过 分光装置或多个对应激光器获得。
14. 根据权利要求 11所述的切割方法， 其特征在于： 所述切割方法进一步 包括： 通过人机交互界面获取切割参数。
PCT/CN2007/002474 2007-06-01 2007-08-16 A cutting device for a prepreg sheet and the method therefor WO2008144969A1 (en)

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