WO2020052225A1 - 激光焊接机 - Google Patents

激光焊接机 Download PDF

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Publication number
WO2020052225A1
WO2020052225A1 PCT/CN2019/080966 CN2019080966W WO2020052225A1 WO 2020052225 A1 WO2020052225 A1 WO 2020052225A1 CN 2019080966 W CN2019080966 W CN 2019080966W WO 2020052225 A1 WO2020052225 A1 WO 2020052225A1
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WO
WIPO (PCT)
Prior art keywords
laser welding
welding machine
mounting plate
motor mover
mold mounting
Prior art date
Application number
PCT/CN2019/080966
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English (en)
French (fr)
Inventor
冯学明
曹奎
仲晓静
张祖幸
Original Assignee
必能信超声(上海)有限公司
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
Priority claimed from CN201811103746.XA external-priority patent/CN109228366A/zh
Priority claimed from CN201821545858.6U external-priority patent/CN209191331U/zh
Application filed by 必能信超声(上海)有限公司 filed Critical 必能信超声(上海)有限公司
Publication of WO2020052225A1 publication Critical patent/WO2020052225A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams

Definitions

  • the invention relates to the field of plastic welding, in particular to a laser welding machine.
  • Laser welding machine also commonly known as laser welding machine, laser welding machine, is a machine that uses laser to process materials. It is divided into laser mold welding machine, automatic laser welding machine, laser spot welding machine, and optical fiber transmission according to its working method.
  • Laser welding machine uses high-energy laser pulses to locally heat the welding material. The energy of laser radiation is diffused into the material through heat conduction, and the welding material is melted to form a specific molten pool to achieve the purpose of welding.
  • the drive system of the laser welding machine uses a lead screw, a cylinder and a pneumatic system.
  • the friction between the various components of the drive system is large, resulting in a large error in the clamping force provided.
  • This type of laser welding machine It can only provide a large clamping force, and cannot meet the application and precision control of small clamping force. Therefore, the laser welding machine in the related art cannot be applied to an application environment that needs to provide a small clamping force.
  • an embodiment of the present invention provides a laser welding machine.
  • An upper mold mounting plate installed on a top plate of the rack
  • a driving module includes a linear guide, a linear motor mover, and a linear motor stator, wherein the linear guide is disposed between the linear motor mover and the linear motor stator, so that the linear motor mover and the linear motor Stator sliding connection
  • a lifting platform connected with the motor mover, and driving the lifting platform to move through the movement of the motor mover;
  • the lower mold mounting plate is connected to the lifting platform through the load cell, and is arranged corresponding to the upper mold mounting plate.
  • the linear guide is vertically arranged, and the motor mover moves vertically along the linear guide,
  • the driving module further includes a first displacement measuring device installed on the motor mover, the motor stator, or the frame, and measures a vertical movement displacement of the motor mover.
  • the linear guide is horizontally arranged, and the motor mover moves horizontally along the linear guide,
  • the driving module further includes a second displacement measuring device installed on the motor mover, the motor stator, or the frame, and measures a horizontal movement displacement of the motor mover.
  • the laser welding machine further includes a counterweight mechanism provided on the frame for balancing the gravity of the lower mold mounting plate and the lifting platform.
  • the counterweight mechanism includes:
  • a balance wheel support is provided on the frame, and the balance wheel is provided on the balance wheel support;
  • a connection bracket is mounted on the motor mover
  • a balance belt is sleeved on the balance wheel, one end of the balance belt is connected to the balance weight, and the other end of the balance belt is in phase with the motor mover through the balance wheel and the connection bracket. connection;
  • the motor mover moves the balance weight to move through the balance belt.
  • the counterweight mechanism includes a magnetic spring
  • One end of the magnetic spring is fixed on the frame, and the other end is connected to the motor mover.
  • the load cell is disposed on the lifting platform, and the lower mold mounting plate is provided on an upper surface of the load cell.
  • the lower mold mounting plate is disposed on an upper surface of the measurement sensor, and the lower mold is disposed on an upper surface of the lower mold mounting plate.
  • the load cell is disposed on a lower surface of the top plate, and the upper mold mounting plate is disposed on a lower surface of the load cell.
  • the upper mold is disposed on a lower surface of the upper mold mounting plate.
  • the linear guide is a crossed roller guide or an air bearing.
  • the laser welding further includes a protective cover for the lifting platform, which is arranged around the lifting platform.
  • the rack includes a bottom plate, a top plate, and a vertical plate, wherein the bottom plate and the top plate are vertically disposed at two ends of the vertical plate, respectively;
  • the upper mold mounting plate is disposed on the top plate
  • the driving module is disposed on the vertical board.
  • the laser welding machine further includes a laser generator and a controller;
  • the controller adjusts the motion of the linear motor in real time according to the clamping force measured by the load cell.
  • the laser welding machine includes a frame, an upper mold mounting plate, a driving module, a lifting platform, a lower mold mounting plate, and a load cell; wherein the upper mold mounting plate is disposed on a top plate of the frame;
  • the module includes a linear guide, a linear motor mover, and a linear motor stator.
  • the linear guide is provided between the linear motor mover and the linear motor stator, and the linear motor mover and the linear motor stator are slidably connected.
  • the vertical plate of the rack; the lower mold mounting plate is connected to the lifting platform through a load cell and is set corresponding to the upper mold mounting plate; the load cell can measure the clamping force between the upper mold and the lower mold.
  • the laser welding machine of the present invention uses a linear motor and has a stable force. The load cell can accurately measure the clamping force between the upper mold and the lower mold, and can provide a small clamping force to the welding workpiece.
  • FIG. 1 is a schematic structural diagram of a laser welding machine according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a rack according to an embodiment of the present invention.
  • FIG. 3 is a partial schematic view of the laser welding machine shown in FIG. 1;
  • Figure 4 is a right side view of the laser welding machine shown in Figure 1;
  • FIG. 5 is a schematic structural diagram of the laser welding machine shown in FIG. 1 in a welding state
  • FIG. 6 is a schematic structural diagram of a laser welding machine according to a second embodiment of the present invention.
  • FIG. 7 is a front view of the laser welding machine shown in FIG. 6;
  • FIG. 8 is a schematic structural diagram of a laser welding machine according to a third embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a welded workpiece according to an embodiment of the present invention.
  • FIG. 10 is a first schematic diagram of a weight balance of a gravity block according to an embodiment of the present invention.
  • FIG. 11 is a second schematic diagram of a weight balance of a gravity block according to an embodiment of the present invention.
  • the laser welding machine of the present invention includes a frame, an upper mold mounting plate, a driving module, a lifting platform, a lower mold mounting plate and a load cell.
  • the upper mold mounting plate is provided on a top plate of the frame
  • the driving module is installed on the machine
  • the lifting platform is connected with the mover in the driving module
  • the lower mold mounting plate is connected to the lifting platform through a load cell, and is arranged corresponding to the upper mold mounting plate.
  • the drive module includes a linear guide, a linear motor mover, and a linear motor stator.
  • the linear guide is provided between the linear motor mover and the linear motor stator, and the linear motor mover and the linear motor stator are slidably connected.
  • the stator is fixed on a vertical plate of the frame.
  • the lifting platform is connected with the motor mover and drives the lifting platform to move through the movement of the motor mover.
  • the load cell can measure the clamping force of the laser welding machine. Through accurate measurement of the clamping force, the load measurement accuracy can be improved.
  • the linear motor has a stable force and can provide a small clamping force within a preset range, such as a minimum clamping force between 1N and 22N.
  • the linear motor and the load cell can cooperate to Further precise control of the clamping force is achieved.
  • the rack includes a top plate, a bottom plate, and a vertical plate, wherein the top plate and the bottom plate are vertically disposed at two ends of the vertical plate, respectively.
  • the frame is roughly a "C" structure without extra support, making it easy to load and unload welded workpieces.
  • the linear guide of the laser welding machine in the present invention may be set vertically or horizontally.
  • the motor mover and the lifting platform can move in the vertical direction along the linear guide.
  • the linear guide is set horizontally, the motor mover and the lifting platform can move in the horizontal direction along the linear guide.
  • the linear guide of the laser welding machine is set vertically.
  • FIG. 1 is a schematic structural diagram of a laser welding machine according to Embodiment 1
  • FIG. 2 is a structural schematic diagram of a frame of the laser welding machine shown in FIG. 1
  • FIG. 3 illustrates a driving module of the laser welding machine.
  • the laser welding machine includes a frame 1, an upper mold mounting plate 7, a driving module 3, a lifting platform 2, a lower mold mounting plate 8, and a load cell 5.
  • the driving module 3 includes a linear guide 16, a motor stator 15, and a motor mover 14.
  • the lifting platform 2 is connected to the motor mover 14 of the driving module 3.
  • the lower mold mounting plate 8 is connected to the lifting platform 2 through the load cell 5 and is correspondingly arranged with the upper mold mounting plate 7.
  • FIG. 2 is a schematic structural diagram of a rack according to an embodiment of the present invention.
  • the rack 1 includes a top plate 11, a bottom plate 12, and a vertical plate 13.
  • This embodiment shows a C-frame. It should be noted that those skilled in the art can select the type, shape and structure of the rack in the related technology according to actual needs.
  • FIG. 4 and FIG. 5 respectively show the structural schematic diagrams of the laser welding machine in this embodiment before welding and during welding.
  • the upper mold mounting plate 7 is disposed on the top plate 11 of the rack 1, and the linear guide rail is disposed vertically.
  • the motor stator 15 is fixed on the vertical plate 13 of the frame 1, and the motor mover 14 is connected to the linear guide 16 (see FIG. 1).
  • the motor mover 14 can move vertically along the linear guide 16. Through the vertical movement of the motor mover 14, the lifting platform 2 can be driven to move along the linear guide in the vertical direction.
  • the load cell 5 in this embodiment is provided on the lifting platform 2, and the lower mold mounting plate 8 is provided on the upper surface of the load cell 5.
  • the lower mold mounting plate 8 is disposed on the upper surface of the measurement sensor 5, and the lower mold 18 is disposed on the upper surface of the lower mold mounting plate 8.
  • the load cell is directly installed on the load acting surface, which can realize accurate measurement of the clamping force and make the load measurement accuracy higher.
  • the linear motor has a stable force and can provide a small clamping force of at least 1-22N.
  • the laser welding machine 1 of this embodiment further includes a weight mechanism 4 (as shown in FIG. 1), which is disposed on the frame 1 or the motor stator 15.
  • the weight mechanism 4 (as shown in FIG. 1) can balance the gravity of the lower mold mounting plate 8 and the lifting platform 2.
  • the linear motor only needs to provide the driving force that drives the lower mold 18 and the lower workpiece 22 to move vertically, which reduces the overall energy consumption of the laser welding machine and ensures accurate control of the clamping force.
  • the counterweight mechanism 4 in this embodiment may be two magnetic springs (as shown in FIG. 8).
  • One end 26 of the magnetic spring is fixed to the frame 1 or the motor stator 15 by a fastener.
  • One end 27 is connected to the motor mover 14.
  • FIG. 10 is a weight balance of a gravity block according to an embodiment of the present invention.
  • Schematic diagram 1 of weight balancing includes: balance wheel 31, balance belt 32, connection bracket 33, balance weight 34, motor mover 35, and balance wheel support 36.
  • the balance wheel support 36 is provided on the frame, and the balance wheel 31 is provided on the balance wheel support; the connection bracket 33 is provided on the motor mover 35; the balance belt 32 is sleeved on the balance wheel 31, and the balance belt 32 One end is connected to the balance weight 34, and the other end of the balance belt 32 is connected to the motor mover 35 through the balance wheel 31 and the connecting bracket 33.
  • the motor mover 35 moves and drives the balance weight through the balance belt 32 Block 34 moves.
  • FIG. 11 is a second schematic diagram of the weight balance of a gravity block according to an embodiment of the present invention.
  • the weight balance of two sets of gravity blocks is shown, which are respectively arranged on both sides of the rack.
  • the balance wheel 31 is installed on the frame through the balance wheel support 36.
  • the two balance wheels adopt the same parameter configuration and rotate at the same time, which drives the balance belt 32 to move along the balance wheel 31, and the motor mover 35 and the balance
  • the counterweight function is realized under the cooperation of the weight block 34.
  • the balance of the magnetic spring and the gravity block is only a preferred embodiment of the counterweight mechanism.
  • Those skilled in the art can use any number of other components as the counterweight mechanism according to the specific application requirements, such as a counterweight. Cylinders, tension springs, counterweight suspensions and other components.
  • the driving module 3 further includes a displacement measuring device 6 installed on the motor mover 14, the motor stator 15, or the frame 1 for measuring the vertical movement displacement of the motor mover 14.
  • the linear guide 16 in this embodiment may be a cross roller guide or an air bearing.
  • Crossed roller bearings have low contact friction. Using crossed roller bearings as linear guides can reduce the effect of friction on the driving force of linear motors.
  • the air bearing is a sliding bearing that uses the dynamic pressure gas film of the shaft and the bearing ring cavity. It has low and static friction force, and the value of the friction force is relatively stable. It can be applied to the mover and stator of the linear motor. Connection.
  • Crossed roller bearings and air bearing are only a preferred embodiment of the linear guide shown in the present application. Those skilled in the art can also use other same or similar structures for simple replacement. Such simple replacement still belongs to the protection of the present invention. range.
  • the laser welding machine 1 further includes a lifting platform protection cover 9 arranged around the lifting platform 2 to prevent damage to peripheral components or operators caused when the lifting platform 2 is accidentally dropped.
  • the laser welding machine further includes a laser generator 29 and a controller 28.
  • the load cell measures the clamping force and feeds back the measurement result to the controller.
  • the controller adjusts the movement of the linear motor in real time according to the measured clamping force, thereby realizing the measurement of the clamping force and closed-loop control.
  • Step 1 The laser welding machine loads the workpiece to be welded. Start the laser welding machine, install the upper workpiece 21 on the upper mold 20, and install the lower workpiece 22 on the lower mold 18, as shown in Figs. 4 and 5.
  • Step 2 The workpiece is closed.
  • the lifting platform 2 rises to a preset parameter, such as a position and a pressure, so that the upper workpiece 21 in the upper mold and the lower workpiece 22 in the lower mold are subjected to the preset pressure.
  • Step 3 Fusion welding the workpiece.
  • the laser generator 29 emits a welding laser, so that the joint surface between the welded plastic workpieces is heated and melted, and because the upper and lower workpieces are always under a force, the upper and lower workpieces are joined.
  • Step 4 Holding pressure and cooling.
  • the laser generator 29 stops emitting the welding laser, and the upper and lower workpieces are always under a set force state, so that the workpieces are kept dimensionally cool.
  • Step 5 Unload the welding workpiece.
  • the lifting platform 2 descends to a preset position, separates the upper mold from the lower mold, and takes out the welded workpiece 30 (as shown in FIG. 9).
  • the linear guide of the laser welding machine is horizontally installed.
  • FIG. 6 is a schematic structural diagram of a laser welding machine according to a second embodiment of the present invention
  • FIG. 7 is a front view of the laser welding machine shown in FIG. 6.
  • the laser welding machine includes a frame 1, an upper mold mounting plate 7, a driving module 3, a lifting platform 2, a lower mold mounting plate 8, and a load cell 5.
  • the driving module 3 includes a linear guide rail, a motor stator 15 and a motor mover 14, which are respectively disposed on the frame 1.
  • the lifting platform 2 is connected to the motor mover 14 of the driving module 3, and the lower mold mounting plate 8 is connected to the lifting platform 2 through the load cell 5 and is correspondingly arranged with the upper mold mounting plate 7.
  • the rack in this embodiment has the same structure as the rack in Embodiment 1.
  • the rack 1 includes a top plate 11, a bottom plate 12, and a vertical plate 13.
  • the upper mold mounting plate 7 is provided on the top plate 11 of the rack 1.
  • the motor stator 15 is fixed on the vertical plate 13 of the frame 1.
  • the motor stator 15, the motor mover 14, and the linear guide are connected, and the linear guide is horizontally arranged.
  • the motor mover 14 can move horizontally along the linear guide. Through the horizontal movement of the motor mover 14, the lifting platform 2 can be driven to move along the linear guide in the horizontal direction.
  • the load cell 5 in this embodiment is provided on the lifting platform 2, and the lower mold mounting plate 8 is provided on the load cell 5.
  • the lower mold mounting plate 8 is disposed on the upper surface of the measurement sensor 5, and the lower mold 18 is disposed on the upper surface of the lower mold mounting plate 8, as shown in FIG. 7.
  • the load cell is directly installed on the load acting surface, which can realize accurate measurement of the clamping force and make the load measurement accuracy higher.
  • linear motors have a stable force and can provide a small clamping force between 1N and 22N.
  • the driving module 3 further includes a displacement measuring device 6, the scale and the probe of the displacement measuring device 6 can be respectively installed on the motor mover 14, the motor stator 15 or the frame 1, and are used for measuring the horizontal movement of the motor mover 14. Displacement.
  • the displacement measuring device can accurately measure the displacement of the motor mover 14, thereby improving the position repeat accuracy of the laser welding machine.
  • the linear guide 16 in this embodiment may be a crossed roller guide or an air bearing.
  • Crossed roller bearings have low contact friction. Using crossed roller bearings as linear guides can reduce the effect of friction on the driving force of linear motors.
  • Crossed roller bearings or air bearings are only a preferred implementation of linear guides, and those skilled in the art can also use other identical or similar structures for simple replacement, and such simple replacement still belongs to the protection scope of the present application.
  • the laser welding machine further includes a lifting platform protection cover 9 which is arranged around the lifting platform 2 to prevent damage to the peripheral components or the operator when the lifting platform 2 is accidentally moved.
  • a lifting platform protection cover 9 which is arranged around the lifting platform 2 to prevent damage to the peripheral components or the operator when the lifting platform 2 is accidentally moved.
  • the laser welding machine further includes a laser generator and a controller.
  • the load cell measures the clamping force and feeds back the measurement result to the controller.
  • the controller adjusts the movement of the linear motor in real time according to the measured clamping force, thereby realizing the measurement of the clamping force and closed-loop control.
  • the linear guide of the laser welding machine is vertically arranged, and the load cell is disposed on the lower surface of the top plate.
  • the laser welding machine 3 includes a frame 1, an upper mold mounting plate 7, a driving module 3, a lifting platform 2, a lower mold mounting plate 8, and a load cell 5.
  • the driving module 3 includes a linear guide rail, a motor stator 15 and a motor mover 14, which are respectively disposed on the frame 1.
  • the lifting platform 2 is connected to the motor mover 14 of the driving module 3.
  • the lower mold mounting plate 8 is disposed on the lifting platform 2 and is correspondingly arranged with the upper mold mounting plate 7.
  • the rack 1 includes a top plate 11, a bottom plate 12 and a vertical plate 13.
  • the motor stator 15 is fixed on the vertical plate 13 of the frame 1, and the motor mover 14 and the linear guide are slidably connected.
  • the motor mover 14 can move vertically along the linear guide. Through the vertical movement of the motor mover, the lifting platform 2 can be driven to move along the linear guide in the vertical direction.
  • the load cell 5 in this embodiment is provided on the lower surface of the top plate 11, and the upper mold mounting plate 7 is provided on the lower surface of the load cell 5.
  • the upper mold mounting plate 7 is disposed on the lower surface of the load cell 5, and the upper mold 20 is disposed on the lower surface of the upper mold mounting plate 7.
  • the load cell is directly installed on the load acting surface, which can realize accurate measurement of the clamping force and make the load measurement accuracy higher.
  • linear motors have a stable force and can provide a small clamping force between 1N and 22N.
  • the laser welding machine of this embodiment further includes a weight mechanism 4 provided on the frame 1.
  • the weight mechanism 4 can balance the gravity of the lower mold mounting plate 8 and the lifting platform 2.
  • the linear motor only needs to provide the driving force for driving the lower mold 18 and the lower workpiece 22, which reduces the overall energy consumption of the laser welding machine and ensures accurate control of the clamping force.
  • the counterweight mechanism 4 in this embodiment is two magnetic springs, wherein one end 26 of each magnetic spring is fixed on the frame 1 or the motor stator 15 and the other end 27 is connected to the motor mover 14 .
  • the magnetic spring is only a preferred way of the counterweight mechanism.
  • Those skilled in the art can use any number of other components as the counterweight mechanism according to the specific application requirements, such as counterweight cylinders, tension springs, Counterweight and other parts.
  • the driving module 3 further includes a displacement measuring device.
  • the scale and the probe of the displacement measuring device 6 are respectively installed on the motor mover 14, the motor stator 15, or the frame 1, and are used to measure the vertical movement displacement of the motor mover 14.
  • the linear guide in this embodiment may be a cross roller guide or an air bearing.
  • Crossed roller bearings have low contact friction. Using crossed roller bearings as linear guides can reduce the effect of friction on the driving force of linear motors.
  • Crossed roller bearings and air-floating bearings are only a preferred implementation of linear guides. Those skilled in the art can also use other identical or similar structures for simple replacement, and such simple replacement still belongs to the protection scope of the present application.
  • the laser welding machine further includes a lifting platform protection cover 9 which is arranged around the lifting platform 2 to prevent damage to the peripheral components or the operator when the lifting platform 2 is accidentally moved.
  • a lifting platform protection cover 9 which is arranged around the lifting platform 2 to prevent damage to the peripheral components or the operator when the lifting platform 2 is accidentally moved.
  • the laser welding machine further includes a laser generator and a controller.
  • the load cell measures the clamping force and feeds back the measurement result to the controller.
  • the controller adjusts the movement of the linear motor in real time according to the measured clamping force, thereby realizing the measurement of the clamping force and closed-loop control.
  • a laser welding machine which includes a frame, an upper mold mounting plate, a driving module, a lifting platform, a lower mold mounting plate, and a load cell; wherein the upper mold mounting plate is disposed on a top plate of the frame.
  • the drive module includes a linear guide and a linear motor mover and a linear motor stator.
  • the linear guide is arranged between the linear motor mover and the linear motor stator, and the linear motor mover and the linear motor stator are slidably connected.
  • the vertical plate of the frame; the lifting platform is connected with the motor mover, and the movement of the lifting platform is driven by the movement of the motor mover;
  • the lower mold mounting plate is connected to the lifting platform through a load cell and is correspondingly arranged with the upper mold mounting plate;
  • the sensor measures the clamping force between the upper and lower molds.
  • the laser welding machine of the present invention uses a linear motor and has a stable force.
  • the force measurement sensor can accurately measure the clamping force between the upper mold and the lower mold, and can provide a small clamping force to the welding workpiece.

Abstract

提供了一种激光焊接机，包括：机架（1）；上模具安装板（7），安装在该机架（1）的顶板（11）上；驱动模块（3），包括线性导轨（16）和直线电机动子（14）和直线电机定子（15），线性导轨（16）设置在直线电机动子（14）和直线电机定子（15）之间，使直线电机动子（14）和直线电机定子（15）滑动连接，电机定子（15）固定设置在机架（1）的垂直板（13）上；升降台（2），与电机动子（14）相连接，通过电机动子（14）的运动驱动升降台（2）运动；下模具安装板（8），通过测力传感器（5）与升降台（2）连接，且与上模具安装板（7）对应设置。该激光焊接机中的直线电机具有稳定的作用力，测力传感器（5）能够对合模力精确测量，确保该激光焊接机对焊接工件的最低可控夹紧力在预设范围内。

Description

激光焊接机
本申请要求于2018年09月14日提交中国专利局、申请号为201821545858.6、发明创造名称为“激光焊接机”的中国专利申请的优先权，并且本申请要求于2018年09月14日提交中国专利局、申请号为201811103746.X、发明创造名称为“激光焊接机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及塑料焊接领域，具体而言，涉及一种激光焊接机。
背景技术
激光焊接机，又常称为激光焊机、镭射焊机，是采用激光对材料进行加工的机器，按其工作方式分为激光模具烧焊机、自动激光焊接机、激光点焊机、光纤传输激光焊接机，激光焊接是利用高能量的激光脉冲对焊接材料进行局部加热，激光辐射的能量通过热传导向材料的内部扩散，将焊接材料熔化后形成特定熔池以达到焊接的目的。
相关技术中，激光焊接机的驱动系统采用的是丝杠，气缸及气动系统，驱动系统的各零部件之间的摩擦力较大，导致提供的夹紧力误差较大，该类激光焊接机只能提供较大的夹紧力，不能满足小夹紧力应用场合和精度控制。因此，相关技术中的激光焊接机无法适用于需要提供小夹紧力的应用环境。
针对相关技术中的激光焊接机无法精确提供小夹紧力的问题，目前尚未提出有效的解决方案。
发明内容
为解决上述问题，本发明的一个实施方式提供一种激光焊接机。
本发明的一个实施方式提供的激光焊接机，包括
机架；
上模具安装板，安装在所述机架的顶板上；
驱动模块，包括线性导轨、直线电机动子和直线电机定子，其中所述线性导轨设置在所述直线电机动子和所述直线电机定子之间，使所述直线电机动子和所述直线电机定子滑动连接；
升降台，与所述电机动子相连接，通过所述电机动子的运动驱动所述升降 台运动；
测力传感器，测量所述激光焊接机的夹紧力；
下模具安装板，通过所述测力传感器与所述升降台连接，且与所述上模具安装板对应设置。
优选地，所述线性导轨为垂直设置，所述电机动子沿所述线性导轨垂直运动，
所述驱动模块还包括第一位移测量装置，安装在所述电机动子、所述电机定子或所述机架上，测量所述电机动子的垂直运动位移。
优选地，所述线性导轨为水平设置，所述电机动子沿所述线性导轨水平运动，
所述驱动模块还包括第二位移测量装置，安装在所述电机动子、所述电机定子或所述机架上，测量所述电机动子的水平运动位移。
优选地，所述激光焊接机还包括配重机构，设置在所述机架上，用于平衡所述下模具安装板和所述升降台的重力。
优选地，所述配重机构包括：
平衡轮；
平衡配重块；
平衡轮支座，设置在所述机架上，所述平衡轮设置在所述平衡轮支座上；
电机动子；
连接支架，安装在所述电机动子上；
平衡带，套接在所述平衡轮上，所述平衡带的一端与所述平衡配重块相连接，所述平衡带的另一端通过所述平衡轮和连接支架与所述电机动子相连接；
其中，所述电机动子运动，通过所述平衡带，带动平衡配重块运动。
优选地，所述配重机构包括磁力弹簧；
所述磁力弹簧的一端固定在所述机架上，另一端与所述电机动子相连接。
优选地，所述测力传感器设置在所述升降台上，且所述下模具安装板设置在所述测力传感器的上表面。
优选地，所述下模具安装板设置在所述测量传感器的上表面，所述下模具设置在所述下模具安装板的上表面。
优选地，所述测力传感器设置在所述顶板的下表面，且所述上模具安装板设置在所述测力传感器的下表面。
优选地，所述上模具设置在所述上模具安装板的下表面。
优选地，所述线性导轨为交叉滚子导轨或气浮轴承。
优选地，激光焊接还包括升降台保护罩，设置在所述升降台四周。
优选地，所述机架包括底板，顶板和垂直板，其中，所述底板和所述顶板分别垂直设置在所述垂直板的两端；
所述上模具安装板设置在所述顶板上；
所述驱动模块设置在所述垂直板上。
优选地，所述激光焊接机还包括激光发生器和控制器；
所述控制器根据所述测力传感器测量的夹紧力实时调节所述直线电机的运动。
通过本发明提供的技术方案，激光焊接机包括机架，上模具安装板，驱动模块，升降台，下模具安装板及测力传感器；其中，上模具安装板设置在机架的顶板上；驱动模块，包括线性导轨和直线电机动子和直线电机定子，线性导轨设置在直线电机动子和所述直线电机定子之间，使直线电机动子和直线电机定子滑动连接，电机定子固定设置在机架的垂直板上；下模具安装板通过测力传感器与升降台连接，且与上模具安装板对应设置；测力传感器可测量上模具和下模具之间的夹紧力。本发明的激光焊接机采用直线电机，具有稳定的作用力，且测力传感器能够精确测量上模具和下模具之间的夹紧力，可向焊接工件提供小夹紧力。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例一的激光焊接机的结构示意图；
图2是根据本发明实施例的机架的结构示意图；
图3是如图1所示的激光焊接机的局部示意图；
图4是如图1所示的激光焊接机的右视图；
图5是如图1所示的激光焊接机在焊接状态时的结构示意图；
图6是根据本发明实施例二的激光焊接机的结构示意图；
图7是如图6所示的激光焊接机的主视图；
图8是根据本发明实施例三的激光焊接机的结构示意图；
图9是根据本发明实施例的焊接完成的工件的示意图；
图10是根据本发明实施例的重力块的配重平衡的示意图一；
图11是根据本发明实施例的重力块的配重平衡的示意图二。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
本发明的激光焊接机包括机架，上模具安装板，驱动模块，升降台，下模具安装板和测力传感器，具体地，上模具安装板设置在机架的顶板上，驱动模块安装在机架的垂直板上，升降台与驱动模块中的动子连接，下模具安装板通过测力传感器与升降台连接，且与上模具安装板对应设置。较优地，驱动模块，包括线性导轨、直线电机动子和直线电机定子，线性导轨设置在直线电机动子和所述直线电机定子之间，使直线电机动子和直线电机定子滑动连接，电机定子固定设置在所述机架的垂直板上。升降台与电机动子相连接，并通过电机动子的运动驱动升降台运动。测力传感器可测量激光焊接机的夹紧力，通过对夹紧力的准确测量，提高载荷的测量精度。本实施例中，直线电机具有稳定的作用力，能够提供预设范围内的小的夹紧力，例如最低为1N至22N之间的小夹紧力，直线电机和测力传感器相配合，能够进一步实现对夹紧力的精确控制。
作为一个较优的实施方式，机架包括顶板，底板和垂直板，其中，顶板和底板分别垂直设置在垂直板的两端。机架大致呈“C”型结构，无多余支撑，便于装载和卸载焊接工件。
需要说明的是，本发明中的激光焊接机的线性导轨可以为垂直设置，也可以为水平设置。当线性导轨垂直设置时，电机动子和升降台可沿线性导轨在垂直方向上移动。当线性导轨水平设置时，电机动子和升降台可沿线性导轨在水平方向上移动。以下将分别描述激光焊接机的线性导轨为垂直设置和水平设置时的两种具体实施方式。
实施方式一：
本实施方式中，激光焊接机的线性导轨为垂直设置。
图1是根据实施方式一的激光焊接机的结构示意图，图2是如图1所示的激光焊接机的机架的结构示意图，图3示出了激光焊接机的驱动模块。如图所示，激光焊接机包括机架1，上模具安装板7，驱动模块3，升降台2，下模具安装板8和测力传感器5。驱动模块3包括线性导轨16、电机定子15和电机动子14。升降台2与驱动模块3的电机动子14相连接，下模具安装板8通过测力传感器5与升降台2相连接，且与上模具安装板7对应设置。
图2是根据本发明实施例的机架的结构示意图，如图2所示，机架1包括顶板11，底板12和垂直板13。本实施例示出的是C型机架。需要说明的是，本领域技术人员可以根据实际需要选择相关技术中机架的类型、形状及结构。
图4和图5分别示出了本实施方式中的激光焊接机在焊接前和焊接时的结构示意图。如图所示，上模具安装板7设置在机架1的顶板11上，线性导轨为垂直设置。电机定子15固定设置在机架1的垂直板13上，电机动子14和线性导轨16(参见图1)连接。电机动子14能够沿线性导轨16垂直运动。通过电机动子14的垂直运动，可驱动升降台2沿线性导轨在垂直方向上运动。
较优地，本实施方式中的测力传感器5设置在升降台2上，且下模具安装板8设置在测力传感器的5上表面。具体地，下模具安装板8设置在测量传感器5的上表面，下模具18设置在下模具安装板8的上表面。
本实施方式中，测力传感器直接安装在载荷作用面上，可实现夹紧力的精确测量，使载荷测量精度更高。另一方面，直线电机具有稳定的作用力，能够提供最低为1-22N的小夹紧力。
需要说明的是，本领域技术人员可以根据具体的应用要求，将测力传感器设置在其他的位置，例如设置在顶板的下表面上。以下将在本说明中的实施方式三中具体描述测力传感器设置在顶板的技术方案。
优选地，本实施方式的激光焊接机1还包括配重机构4(如图1所示)，设置在机架1或电机定子15上。配重机构4(如图1所示)可平衡下模具安装板8和升降台2的重力。焊接时，直线电机仅需提供驱动下模具18和下工件22垂直运动的驱动力，降低了激光焊接机的整体能耗，且保证夹紧力的精 确控制。
更优地，该实施方式中的配重机构4可以为两个磁力弹簧(如图8所示)，磁力弹簧的一端26通过紧固件固定在机架1或电机定子15，磁力弹簧的另一端27与电机动子14相连接。
在实施例中，还可以采用重力块的配重平衡方案，例如：采用平衡轮、平衡带和平衡配重块与直线电机动子进行平衡，图10是根据本发明实施例的重力块的配重平衡的示意图一，如图10所示，包括：平衡轮31，平衡带32，连接支架33，平衡配重块34、电机动子35、平衡轮支座36。其中，平衡轮支座36，设置在机架上，平衡轮31设置在平衡轮支座上；连接支架33设置在电机动子35上；平衡带32套接在平衡轮31上，平衡带32的一端与平衡配重块34相连接，平衡带32的另一端通过平衡轮31和连接支架33与电机动子35相连接；其中，电机动子35运动，通过平衡带32，带动平衡配重块34运动。
需要说明的是，本领域技术人员可以根据需要选择一组或者多组重力块的配重平衡。在图10中，仅仅示出了一组重力块的配重平衡。图11是根据本发明实施例的重力块的配重平衡的示意图二，在图11所示的技术方案中，示出了两组重力块的配重平衡，分别设置在机架的两侧，在图11中，平衡轮31通过平衡轮支座36安装在机架上，两个平衡轮采用相同参数配置，同时转动，带动平衡带32沿着平衡轮31运动，在电机动子35和平衡配重块34的共同作用下实现配重功能。
需要说明的是，磁力弹簧及重力块配重平衡仅是配重机构的优选实施方式，本领域技术人员可以根据具体的应用要求，采用任意个数的其他零部件作为配重机构，例如配重气缸，拉簧，配重吊块等零部件。
较优地，驱动模块3还包括位移测量装置6，安装在电机动子14、电机定子15或机架1上，用于测量电机动子14垂直运动的位移。
较优地，本实施方式中的线性导轨16(如图3所示)可以为交叉滚子导轨或气浮轴承。交叉滚子轴承的接触摩擦低，采用交叉滚子轴承作为线性导轨可以减少摩擦力对直线电机驱动力的影响。
气浮轴承是利用轴和轴承环型腔的动压气膜构成滑动轴承，在该处具有及低静、动摩擦力，并且该摩擦力的数值相对比较稳定，可以适用于直线电机的 动子与定子间的连接。
交叉滚子轴承和气浮轴承仅是本申请示出的线性导轨的一种优选实施方式，本领域技术人员也可以采用其他相同或相似的结构进行简单替换，这种简单替换仍属于本发明的保护范围。
较优地，激光焊接机1还包括升降台保护罩9，设置在升降台2四周，防止升降台2意外掉落时，对周边部件或操作者带来的损害。
较优地，激光焊接机还包括激光发生器29和控制器28。激光焊接机运行时，测力传感器测量夹紧力并将测量结果反馈给控制器，控制器根据测量的夹紧力实时调节直线电机的运动，进而实现夹紧力的测量和闭环控制。
为了更好地说明，本激光焊接机在焊接时达到的技术效果，下面结合上述激光焊接机的结构对实施步骤进行示例说明。优选地，在实施时，可以采用如下步骤：
步骤一：激光焊接机装载待焊接工件。启动激光焊接机，将上工件21安装在上模具20，将下工件22安装在下模具18，如图4和图5所示。
步骤二：工件合模。升降台2上升到达预设参数，例如位置、压力等，使得上模具中的上工件21与下模具中的下工件22受到预设的压力。
步骤三：熔融焊接工件。在工件焊接部位，激光发生器29发射焊接激光，使得焊接塑料工件间的接合面受热发生融化，并且由于上工件和下工件一直处于受力状态，使上工件与下工件产生接合。
步骤四：保压冷却。激光发生器29停止发射焊接激光，上工件与下工件一直处于设定的受力状态，使工件保持尺寸冷却。
步骤五：卸载焊接工件。升降台2下降到达预设位置，使上模具与下模具分离，取出焊接完成的工件30(如图9所示)。
实施方式二：
本实施方式中，激光焊接机的线性导轨为水平设置。
图6是根据本发明实施例二的激光焊接机的结构示意图，图7是如图6所示的激光焊接机的主视图。如图所示，激光焊接机包括机架1，上模具安装板7，驱动模块3，升降台2，下模具安装板8和测力传感器5。驱动模块3包括线性导轨、电机定子15和电机动子14，分别设置在机架1上。升降台2 与驱动模块3的电机动子14相连接，下模具安装板8通过测力传感器5与升降台2相连接，且与上模具安装板7对应设置。
较优地，本实施方式中的机架与实施方式一的机架的结构相同，机架1包括顶板11，底板12和垂直板13。
具体地，上模具安装板7设置在机架1的顶板11上。电机定子15固定设置在机架1的垂直板13上，电机定子15、电机动子14和线性导轨连接，且线性导轨为水平布置。电机动子14能够沿线性导轨水平运动。通过电机动子14的水平运动，可驱动升降台2沿线性导轨在水平方向上运动。
较优地，本实施方式中的测力传感器5设置在升降台2上，且下模具安装板8设置在测力传感器5上。具体地，下模具安装板8设置在测量传感器5的上表面，且下模具18设置在下模具安装板8的上表面，如图7所示。
本实施方式中，测力传感器直接安装在载荷作用面上，可实现夹紧力的精确测量，使载荷测量精度更高。另一方面，直线电机具有稳定的作用力，能够提供最低为1N至22N之间的小夹紧力。
需要说明的是，本领域技术人员可以根据具体的应用要求，将测力传感器设置在其他的位置，例如设置在顶板上。本实施方式仅作为一种优选实施方式，并不是对测力传感器的位置的限定，任何在本实施方式上的变换仍属于本发明保护的技术方案。
较优地，驱动模块3还包括位移测量装置6，位移测量装置6的标尺和探头可以分别安装在电机动子14、电机定子15或机架1上，用于测量电机动子14水平运动的位移。位移测量装置可以精确测量电机动子14的位移，进而提高激光焊接机的位置重复精度。
较优地，本实施方式中的线性导轨16可以为交叉滚子导轨或气浮轴承。交叉滚子轴承的接触摩擦低，采用交叉滚子轴承作为线性导轨可以减少摩擦力对直线电机驱动力的影响。
交叉滚子轴承或气浮轴承仅是线性导轨的一种优选实施方式，本领域技术人员也可以采用其他相同或相似的结构进行简单替换，这种简单替换仍属于本申请的保护范围。
较优地，激光焊接机还包括升降台保护罩9，设置在升降台2四周，防止 升降台2意外运动时，对周边部件或操作者带来的损害。
较优地，激光焊接机还包括激光发生器和控制器。激光焊接机运行时，测力传感器测量夹紧力并将测量结果反馈给控制器，控制器根据测量的夹紧力实时调节直线电机的运动，进而实现夹紧力的测量和闭环控制。
需要说明的是，实施方式二提供的激光焊接机的工作过程与实施方式一中描述的工作过程相同，因此，此处将不再赘述。
实施方式三：
本实施方式中，激光焊接机的线性导轨为垂直设置，且测力传感器设置在顶板的下表面上。
如图8所示，激光焊接机3包括机架1，上模具安装板7，驱动模块3，升降台2，下模具安装板8和测力传感器5。驱动模块3包括线性导轨、电机定子15和电机动子14，分别设置在机架1上。升降台2与驱动模块3的电机动子14相连接，下模具安装板8设置在升降台2上，且与上模具安装板7对应设置。
机架1包括顶板11，底板12和垂直板13。电机定子15固定设置在机架1的垂直板13上，电机动子14和线性导轨滑动连接。电机动子14能够沿线性导轨垂直运动。通过电机动子的垂直运动，可驱动升降台2沿线性导轨在垂直方向上运动。
较优地，本实施方式中的测力传感器5设置在顶板11的下表面上，且上模具安装板7设置在测力传感器的5的下表面。具体地，上模具安装板7设置在测力传感器5的下表面，上模具20设置在上模具安装板7的下表面。
本实施方式中，测力传感器直接安装在载荷作用面上，可实现夹紧力的精确测量，使载荷测量精度更高。另一方面，直线电机具有稳定的作用力，能够提供最低为1N至22N之间的小夹紧力。
优选地，本实施方式的激光焊接机还包括配重机构4，设置在机架1上。配重机构4可平衡下模具安装板8和升降台2的重力。焊接时，直线电机仅需提供驱动下模具18和下工件22的驱动力，降低了激光焊接机的整体能耗，且保证夹紧力的精确控制。
更优地，该实施方式中的配重机构4为两个磁力弹簧，其中，每个磁力弹 簧的一端26固定在机架1上或电机定子15上，另一端27与电机动子14相连接。
需要说明的是，磁力弹簧仅是配重机构的一种优选方式，本领域技术人员可以根据具体的应用要求，采用任意个数的其他零部件作为配重机构，例如配重气缸，拉簧，配重吊块等零部件。
较优地，驱动模块3还包括位移测量装置，位移测量装置6的标尺和探头分别安装在电机动子14、电机定子15或机架1上，用于测量电机动子14垂直运动的位移。
较优地，本实施方式中的线性导轨可以为交叉滚子导轨或气浮轴承。交叉滚子轴承的接触摩擦低，采用交叉滚子轴承作为线性导轨可以减少摩擦力对直线电机驱动力的影响。
交叉滚子轴承和气浮轴承仅是线性导轨的一种优选实施方式，本领域技术人员也可以采用其他相同或相似的结构进行简单替换，这种简单替换仍属于本申请的保护范围。
较优地，激光焊接机还包括升降台保护罩9，设置在升降台2四周，防止升降台2意外运动时，对周边部件或操作者带来的损害。
较优地，激光焊接机还包括激光发生器和控制器。激光焊接机运行时，测力传感器测量夹紧力并将测量结果反馈给控制器，控制器根据测量的夹紧力实时调节直线电机的运动，进而实现夹紧力的测量和闭环控制。
需要说明的是，实施方式三提供的激光焊接机的工作过程与实施方式一中描述的工作过程相同，因此，此处将不再赘述。
通过上述实施例，提供了一种激光焊接机，包括机架，上模具安装板，驱动模块，升降台，下模具安装板及测力传感器；其中，上模具安装板设置在机架的顶板上；驱动模块，包括线性导轨和直线电机动子和直线电机定子，线性导轨设置在直线电机动子和直线电机定子之间，使直线电机动子和直线电机定子滑动连接，电机定子固定设置在机架的垂直板上；升降台与电机动子相连接，通过电机动子的运动驱动升降台运动；下模具安装板通过测力传感器与升降台连接，且与上模具安装板对应设置；测力传感器可测量上模具和下模具之间的夹紧力。本发明的激光焊接机采用直线电机，具有稳定的作用力，且通过测力 传感器能够精确测量上模具和下模具之间的夹紧力，可向焊接工件提供小夹紧力。需要说明的是，这些技术效果并不是上述所有的实施方式所具有的，有些技术效果是某些优选实施方式才能取得的。
以上所述仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内所作的任何修改、等同替换、改进等，均包含在本发明的保护范围内。

Claims (14)

  1. 一种激光焊接机，其特征在于，包括：
    机架；
    上模具安装板，安装在所述机架的顶板上；
    驱动模块，包括线性导轨和直线电机动子和直线电机定子，所述线性导轨设置在所述直线电机动子和所述直线电机定子之间，使所述直线电机动子和所述直线电机定子滑动连接，所述电机定子固定设置在所述机架的垂直板上；
    升降台，与所述电机动子相连接，通过所述电机动子的运动驱动所述升降台运动；
    测力传感器，测量所述激光焊接机的夹紧力；
    下模具安装板，通过所述测力传感器与所述升降台连接，且与所述上模具安装板对应设置。
  2. 根据权利要求1所述的激光焊接机，其特征在于，所述线性导轨为垂直设置，所述电机动子沿所述线性导轨垂直运动，
    所述驱动模块还包括第一位移测量装置，安装在所述电机动子、所述电机定子或所述机架上，用于测量所述电机动子的垂直运动位移。
  3. 根据权利要求1所述的激光焊接机，其特征在于，所述线性导轨为水平设置，所述电机动子沿所述线性导轨水平运动，
    所述驱动模块还包括第二位移测量装置，安装在所述电机动子、所述电机定子或所述机架上，用于测量所述电机动子的水平运动位移。
  4. 根据权利要求2所述的激光焊接机，其特征在于，所述激光焊接机还包括配重机构，设置在所述机架上，用于平衡所述下模具安装板和所述升降台的重力。
  5. 根据权利要求4所述的激光焊接机，其特征在于，所述配重机构包括磁力弹簧；
    所述磁力弹簧的一端固定在所述机架上，另一端与所述电机动子相连接。
  6. 根据权利要求4所述的激光焊接机，其特征在于，所述配重机构包括：
    平衡轮；
    平衡配重块；
    平衡轮支座，设置在所述机架上，所述平衡轮设置在所述平衡轮支座上；
    电机动子；
    连接支架，安装在所述电机动子上；
    平衡带，套接在所述平衡轮上，所述平衡带的一端与所述平衡配重块相连接，所述平衡带的另一端通过所述平衡轮和连接支架与所述电机动子相连接；
    其中，所述电机动子运动，通过所述平衡带，带动平衡配重块运动。
  7. 根据权利要求1所述的激光焊接机，其特征在于，所述测力传感器的一个表面与所述升降台相连接，另一个表面与所述下模安装板相连接。
  8. 根据权利要求7所述的激光焊接机，其特征在于，所述下模具安装板与所述测量传感器的表面连接，所述下模具设置在所述下模具安装板的上表面。
  9. 根据权利要求1所述的激光焊接机，其特征在于，所述测力传感器设置在所述顶板的下表面，且所述上模具安装板设置在所述测力传感器的下表面。
  10. 根据权利要求9所述的激光焊接机，其特征在于，所述上模具设置在所述上模具安装板的下表面。
  11. 根据权利要求1至10中任一项所述的激光焊接机，其特征在于，所述线性导轨包括：交叉滚子导轨或气浮轴承。
  12. 根据权利要求1至10中任一项所述的激光焊接机，其特征在于，所述激光焊接还包括升降台保护罩，设置在所述升降台四周。
  13. 根据权利要求1至10中任一项所述的激光焊接机，其特征在于，
    所述机架包括底板，顶板和垂直板，其中，所述底板和所述顶板分别垂直设置在所述垂直板的两端；
    所述上模具安装板安装在所述顶板上；
    所述驱动模块设置在所述垂直板上。
  14. 根据权利要求1至10中任一项所述的激光焊接机，其特征在于，所述激光焊接机还包括激光发生器和控制器；
    所述控制器根据所述测力传感器测量的夹紧力实时调节所述直线电机的 运动。
PCT/CN2019/080966 2018-09-14 2019-04-02 激光焊接机 WO2020052225A1 (zh)

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