阅读说明：本技术 一种高速高精度带自由环切的多轴联动激光切割机 (High-speed high-precision multi-axis linkage laser cutting machine with free circular cutting function ) 是由 陆志伟 于 2020-05-11 设计创作，主要内容包括：本发明公开了一种高速高精度带自由环切的多轴联动激光切割机,第一轴为主轴的升降,用于焊接的激光头固定在主轴的底部；第二轴为工件的前后平移,工作固定在支架上,支架的底部固定在一组导轨上,支架可以在导轨上前后平移,从而带动工件做前后平移；第三轴为主轴的左右平移；第四轴为激光头支座的转动,激光头支座固定在主轴的底部,主轴可以受驱转动,从而带动激光头支座在水平面上做360°的转动；第五轴为激光头的转动,激光头支座的侧面设置有转轴,激光头套设在转轴上,当转轴转动时,能带动激光头绕转轴在竖直平面内摆动；第六轴为工件自身的转动。通过六轴的联动,可以使得激光头能够绕着工件进行自由的环向切割。(The invention discloses a high-speed high-precision multi-axis linkage laser cutting machine with free circular cutting, wherein a first axis is used for lifting a main shaft, and a laser head for welding is fixed at the bottom of the main shaft; the second shaft is used for the front-back translation of the workpiece, the workpiece is fixed on the bracket in a working mode, the bottom of the bracket is fixed on a group of guide rails, and the bracket can translate front and back on the guide rails so as to drive the workpiece to translate front and back; the third axis is the left-right translation of the main shaft; the fourth shaft is used for rotating the laser head support, the laser head support is fixed at the bottom of the main shaft, and the main shaft can be driven to rotate, so that the laser head support is driven to rotate 360 degrees on the horizontal plane; the fifth shaft is used for rotating the laser head, a rotating shaft is arranged on the side surface of the laser head support, the laser head is sleeved on the rotating shaft, and when the rotating shaft rotates, the laser head can be driven to swing in a vertical plane around the rotating shaft; the sixth axis is the rotation of the workpiece itself. Through the linkage of six axles, can make the laser head carry out the hoop cutting of freedom around the work piece.)

1. The utility model provides a high-speed high accuracy area is free many axle linkage laser cutting machine who cuts, its characterized in that: the automatic lifting device comprises a rack, wherein a group of parallel slide rails is arranged on the top surface of the rack, a slide block is erected between the two slide rails and can slide left and right in a reciprocating manner along the slide rails, a mounting hole is formed in the center of the slide block, a main shaft is inserted into the mounting hole, a motor is arranged at the top of the main shaft and can drive the main shaft to lift, and meanwhile, the main shaft can slide along the slide rails along with the slide block;

the laser head support is fixed at the bottom of the main shaft and can be driven to rotate, a rotating shaft is arranged on the side surface of the laser head support, the laser head is sleeved on the rotating shaft, and when the rotating shaft rotates, the laser head can be driven to swing relative to the support in a vertical plane around the rotating shaft; laser is emitted from the tip of the laser head and is shot on a workpiece to be burnt and cut;

a workbench is formed at the bottom of the rack, a group of guide rails with a front and back trend are laid on the workbench, a tool is connected on the guide rails in a sliding manner, the tool comprises two upright posts, rotating arms are fixed at the tops of the upright posts, two ends of a pipe fitting are respectively fixed on the rotating arms, and the two rotating arms are driven by a driving mechanism to rotate so as to drive the pipe fitting to turn;

the laser head comprises an installation box body, the installation box body is sleeved on the rotating shaft and can rotate along with the rotating shaft, the bottom of the installation box body is connected with an outer shell, an installation hole is formed in the bottom surface of the outer shell, a laser diode is fixed on the upper portion of the installation hole, lenses are fixed on the lower portion of the installation hole and can focus laser emitted by the laser diode, a common focus is formed on a workpiece, so that a focus position is burnt, an inner shell is further connected to the bottom of the installation box body, a cavity is formed inside the outer shell, the inner shell is located in the cavity, the laser diode is provided with pins, the pins are inserted into the inner shell, a heat dissipation channel is formed between the bottom surface of the inner shell and an installation surface of the laser diode, and heat dissipation holes are formed in the outer shell through the heat dissipation channel, the louvre highly will be higher than the bottom surface of interior casing the top surface of interior casing with be formed with entry channel between the installation box, entry channel is in the surface of installation box is formed with the air inlet the bottom surface of interior casing is fixed the ventilation blower, and this ventilation blower is used for producing the air current and discharging through the louvre in the heat dissipation channel with the air that gets into from entry channel's air inlet, be formed with the cone on the top surface of shell body, the cone is just facing the ventilation blower.

2. The high-speed high-precision multi-axis linkage laser cutting machine with free circular cutting according to claim 1, characterized in that: the shell is made of heat conducting materials.

3. The high-speed high-precision multi-axis linkage laser cutting machine with free circular cutting according to claim 1, characterized in that: the tool further comprises a gear box body, the gear box body is connected to the guide rail in a sliding mode, the two upright posts are fixed to two sides of the gear box body and communicated with the inside of the gear box body, a gear shaft is arranged inside the gear box body, driven gears are sleeved at two ends of the gear shaft, a driving motor is fixed to one of the upright posts, a driving gear is sleeved in a motor of the driving motor and drives the driving gear to rotate, a rotating arm on the side upright post is connected with the driving gear through a driving shaft, when the driving gear rotates, the driving shaft can be driven to rotate so as to drive the rotating arm of the side upright post to rotate, a synchronous belt is sleeved on the driving gear, the synchronous belt is sleeved on the driven gear, a driven shaft penetrates through the upright post on the other side, and a rotating arm of the upright post on the other side, the driven shaft is also linked with the gear shaft through a synchronous belt.

4. The high-speed high-precision multi-axis linkage laser cutting machine with free circular cutting according to claim 1, characterized in that: the air inlet is disposed around the ventilator.

5. The high-speed high-precision multi-axis linkage laser cutting machine with free circular cutting according to claim 1, characterized in that: the top of the rack is provided with a ball screw, the ball screw is arranged in parallel with the slide rail, a screw motor is fixed on the rack, the screw motor can drive the ball screw to rotate, and the sliding block is fixed on a screw nut of the ball screw.

Technical Field

The invention relates to the technical field of laser cutting, in particular to a high-speed high-precision multi-axis laser cutting machine with free circular cutting. Specifically, in the multi-shaft laser cutting machine, the first shaft is used for lifting the main shaft, the laser head for welding is fixed at the bottom of the main shaft, and the main shaft is driven by the motor to vertically lift; the second shaft is used for the front-back translation of the workpiece, the workpiece is fixed on the bracket in a working mode, the bottom of the bracket is fixed on a group of guide rails, and the bracket can translate front and back on the guide rails so as to drive the workpiece to translate front and back; the third shaft is used for the left-right translation of the main shaft, a group of transverse sliding rails is arranged at the top of the machine frame, the main shaft is sleeved on the sliding rails through sliding blocks, and the sliding blocks can slide along the sliding rails so as to drive the main shaft to slide left and right along the sliding rails; the fourth shaft is used for rotating the laser head support, the laser head support is fixed at the bottom of the main shaft, and the main shaft can be driven to rotate, so that the laser head support is driven to rotate 360 degrees on the horizontal plane; the fifth shaft is used for rotating the laser head, a rotating shaft is arranged on the side surface of the laser head support, the laser head is sleeved on the rotating shaft, and when the rotating shaft rotates, the laser head can be driven to swing in a vertical plane around the rotating shaft; the sixth axis is the rotation of the workpiece itself. Through the linkage of six axles, can make the laser head carry out the hoop cutting of freedom around the work piece.

Background

The structure of the existing laser cutting equipment is shown in a Chinese patent of 201620695337.3, and the applicant's major laser science and technology limited company discloses double-station laser cutting equipment which comprises an industrial personal computer, a double-rotor four-axis motion platform, a visual detection assembly and a laser cutting assembly; two objects to be detected are arranged in the clamp on the double-mover four-axis motion platform and can respectively realize the motion of X, Y axes; the visual detection assembly is used for detecting the burr position on the object to be detected; the laser cutting assembly performs laser burr cutting on the object to be detected according to the burr position; the industrial personal computer respectively controls the double-rotor four-axis motion platform, the vision detection assembly and the laser cutting assembly to work.

However, the laser cutting device can only realize X, Y axis translation of the workpiece, and the laser head is always positioned above the workpiece, so that the laser head cannot cut upwards or obliquely upwards from the bottom of the workpiece, namely, the laser cutting device cannot realize annular cutting of the workpiece.

Disclosure of Invention

The invention aims to provide a high-speed high-precision multi-axis linkage laser cutting machine with free circular cutting aiming at the technical current situation.

In order to achieve the purpose, the invention provides the following technical scheme:

a high-speed high-precision multi-axis linkage laser cutting machine with free circular cutting comprises a rack, wherein a group of parallel slide rails is arranged on the top surface of the rack, a slide block is erected between the two slide rails and can slide left and right in a reciprocating manner along the slide rails, a mounting hole is formed in the center of the slide block, a main shaft is inserted into the mounting hole, a motor is arranged at the top of the main shaft and can drive the main shaft to lift, and meanwhile, the main shaft can slide along the slide rails along with the slide blocks;

the laser head support is fixed at the bottom of the main shaft and can be driven to rotate, a rotating shaft is arranged on the side surface of the laser head support, the laser head is sleeved on the rotating shaft, and when the rotating shaft rotates, the laser head can be driven to swing relative to the support in a vertical plane around the rotating shaft; laser is emitted from the tip of the laser head and is shot on a workpiece to be burnt and cut;

a workbench is formed at the bottom of the rack, a group of guide rails with a front and back trend are laid on the workbench, a tool is connected on the guide rails in a sliding manner, the tool comprises two upright posts, rotating arms are fixed at the tops of the upright posts, two ends of a pipe fitting are respectively fixed on the rotating arms, and the two rotating arms are driven by a driving mechanism to rotate so as to drive the pipe fitting to turn;

the laser head comprises an installation box body, the installation box body is sleeved on the rotating shaft and can rotate along with the rotating shaft, the bottom of the installation box body is connected with an outer shell, an installation hole is formed in the bottom surface of the outer shell, a laser diode is fixed on the upper portion of the installation hole, lenses are fixed on the lower portion of the installation hole and can focus laser emitted by the laser diode, a common focus is formed on a workpiece, so that a focus position is burnt, an inner shell is further connected to the bottom of the installation box body, a cavity is formed inside the outer shell, the inner shell is located in the cavity, the laser diode is provided with pins, the pins are inserted into the inner shell, a heat dissipation channel is formed between the bottom surface of the inner shell and an installation surface of the laser diode, and heat dissipation holes are formed in the outer shell through the heat dissipation channel, the louvre highly will be higher than the bottom surface of interior casing the top surface of interior casing with be formed with entry channel between the installation box, entry channel is in the surface of installation box is formed with the air inlet the bottom surface of interior casing is fixed the ventilation blower, and this ventilation blower is used for producing the air current and discharging through the louvre in the heat dissipation channel with the air that gets into from entry channel's air inlet, be formed with the cone on the top surface of shell body, the cone is just facing the ventilation blower.

As an improvement of the invention, the shell is made of heat conducting material.

Preferably, the tool further comprises a gear box body, the gear box body is slidably connected to the guide rail, the two upright posts are fixed on two sides of the gear box body and communicated with the inside of the gear box body, a gear shaft is arranged inside the gear box body, driven gears are sleeved at two ends of the gear shaft, a driving motor is fixed on one upright post, a driving gear is sleeved in the motor of the driving motor and is driven to rotate by the driving motor, a rotating arm on the upright post is connected with the driving gear through a driving shaft, when the driving gear rotates, the driving shaft can be driven to rotate so as to drive the rotating arm of the upright post to rotate, a synchronous belt is sleeved on the driving gear, the synchronous belt is sleeved on the driven gear, a driven shaft penetrates through the upright post on the other side, and the rotating arm of the upright post on the other side is sleeved on the driven shaft, the driven shaft is also linked with the gear shaft through a synchronous belt.

As a further preference of the invention, the air inlet is located around the ventilator.

As a further improvement of the invention, a ball screw is arranged at the top of the frame, the ball screw is arranged in parallel with the slide rail, a screw motor is fixed on the frame, the screw motor can drive the ball screw to rotate, and the slide block is fixed on a screw nut of the ball screw.

Compared with the prior art, the invention has the advantages that: the six-axis linkage can ensure that the laser head can freely perform annular cutting around a workpiece, and the six-axis linkage can be realized, so that the laser cutting machine has high cutting efficiency, can perform cutting at multiple angles without stopping, has wide application range, does not need to be disassembled for multiple times and fixed again, and remarkably improves the cutting precision. In addition, a heat dissipation mechanism is arranged in the laser head, so that the service life of the laser head can be obviously prolonged.

Drawings

FIG. 1 is a schematic structural diagram of a high-speed high-precision multi-axis linkage laser cutting machine with free circular cutting according to an embodiment of the invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view of the tooling portion of FIG. 1;

fig. 4 is a configuration diagram of the inside of the laser head.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in the attached drawings, the embodiment is a high-speed high-precision multi-axis linkage laser cutting machine with free circular cutting, which comprises a frame 1, a set of parallel slide rails 2 arranged on the top surface of the frame, a ball screw 3 arranged between the two sets of slide rails and parallel to the two sets of slide rails, a screw motor 4 arranged on the side surface of the frame, a ball screw connected with the motor shaft of the screw motor through a coupler so as to control the rotation of the ball screw by the screw motor, a screw nut sleeved on the ball screw and an accessory necessary for each ball screw, when the ball screw rotates, the screw nut can be driven to slide on the ball screw, the specific principle of the screw nut is described in the mechanical design manual about the principle description of the ball screw, the invention is the prior art, so the specific description is not provided in the embodiment, a slide block 5 is fixed on the screw nut, the screw rod nut drives the sliding block to slide along the ball screw, and the sliding block is erected between the two sliding rails, so that the sliding block can also slide along the sliding rails.

A mounting hole is arranged at the center of the slide block, a main shaft 6 is inserted in the mounting hole, a motor 7 is arranged at the top of the main shaft, the main shaft is divided into a fixed sleeve and a sliding sleeve, the fixed sleeve is inserted in the mounting hole and does not move, a vertical sliding groove is arranged on the inner wall of the fixed sleeve, the sliding sleeve is connected in the sliding groove in a sliding way, the sliding sleeve is connected with a motor through a ball screw or other linkage mechanisms, so that the motor controls the lifting of the sliding sleeve, the laser head support 8 is fixed at the bottom of the sliding sleeve, a micro motor is arranged in the bottom of the sliding sleeve, the laser head support is fixed on a motor shaft of the micro motor, the micro motor drives the laser head support to rotate, a rotating shaft is arranged on the side surface of the laser head support, the laser head 9 is sleeved on the laser head support, a micro motor is also arranged in the laser head support and drives the rotating shaft to rotate, when the rotating shaft rotates, the laser head can be driven to swing relative to the support in a vertical plane around the rotating shaft; the laser is emitted from the tip of the laser head and is shot on the workpiece to carry out burning cutting.

The laser head is including installation box 91, the installation box cover is established in the pivot and can be rotated along with the pivot, shell body 92 is being connected to the bottom of installation box, be formed with the mounting hole on the bottom surface of shell body the laser diode 93 is being fixed on the upper portion of mounting hole lens 94 is being fixed to the lower part of mounting hole, these lenses can with the laser of laser diode transmission is focused on, thereby forms public focus on the work piece and burns the focus position, through forming public focus, every laser diode can share the required gross energy of cutting and the laser that need launch, consequently will produce less heat in every diode department. And since the laser diodes are distributed, the heat they generate is spread over a larger area, thus keeping the temperature low. The service life of the laser diode is greatly related to the temperature, and the service life of the laser diode is shortened at higher temperature.

For example, if laser cutting requires 1W of laser light, then if the loss is 40%, one or more laser diodes must produce 1.67W of laser light. The excess 0.67W of laser light will be converted to heat in the laser head, which must be removed. The function of the inserted lens is to adjust the angle of the beam so as to eliminate the loss of laser light. This will significantly improve the efficiency of laser cutting and, in addition, the amount of heat generated is greatly reduced. The lens in this embodiment is made of glass.

Glass optics are the high energy choice because plastic optics can melt if there are impurities on the surface of the optics. The lenses may be coated or uncoated, and in this embodiment the lenses are preferably made using fresnel lenses.

An inner shell 95 is further connected to the bottom of the installation box, a cavity is formed inside the outer shell, the inner shell is located in the cavity, the laser diode is provided with a pin 96, the pin is inserted into the inner shell, a heat dissipation channel 10 is formed between the bottom surface of the inner shell and the installation surface of the laser diode, the heat dissipation channel is provided with a heat dissipation hole 11 on the outer shell, the height of the heat dissipation hole is higher than the bottom surface of the inner shell, an inlet channel 12 is formed between the top surface of the inner shell and the installation box, the inlet channel is provided with an air inlet 13 on the surface of the installation box, a ventilator 14 is fixed on the bottom surface of the inner shell and used for generating airflow in the heat dissipation channel from the air inlet of the inlet channel and discharging the airflow through the heat dissipation hole, and a cone 15 is formed on the top surface of the outer shell, the vertebral body is opposite to the ventilator. Even if the ventilator is not arranged, the heat dissipation channel can also reduce the temperature inside the laser head through convection heat dissipation, but the ventilator is arranged to form a vortex in the heat dissipation channel to improve the heat dissipation effect, and meanwhile, the ventilator is used for increasing wind power to prevent dust from accumulating in the heat dissipation channel. In addition, the air inlet is arranged around the ventilator, because the air inlet arranged around the ventilator may be blocked or partially blocked by the workpiece during the circumferential laser cutting of the workpiece. By providing an air inlet around the ventilator, air can be drawn in from all directions of the ventilator. Thus, the air inlet and the inlet channel cannot be completely blocked.

And the purpose of providing a cone is that the cone will direct the airflow in all directions, thereby ensuring that the airflow is distributed relatively evenly to all parts of the heat dissipation channel. This will reduce the variation in dead zone of the airflow while also preventing the accumulation of dust. Thus, the taper increases the heat dissipation efficiency. To further increase the heat dissipation efficiency, the outer housing may be made of a heat conductive material. The outer housing is in direct contact with the heated laser diode. Therefore, the heat conductive material can spread the generated heat over a large area along the heat dissipation channel, which will improve the heat removal efficiency. The thermally conductive material may be a metal, such as copper or aluminum. The inner housing may also be made of a thermally conductive material.

A workbench 16 is formed at the bottom of the rack, a group of guide rails 17 which run forwards and backwards are laid on the workbench, a tool is connected on the guide rails in a sliding mode and comprises two upright posts 18, rotating arms 19 are fixed to the tops of the upright posts, two ends of a pipe fitting are fixed to the rotating arms respectively, the two rotating arms are driven by a driving mechanism to rotate, and therefore the pipe fitting is driven to turn. The tool further comprises a gear box body 20, the gear box body is connected to the guide rail in a sliding mode, the two upright columns are fixed to two sides of the gear box body and communicated with the inside of the gear box body, a gear shaft 21 is arranged inside the gear box body, driven gears 22 are sleeved at two ends of the gear shaft, a driving motor 23 is fixed to one of the upright columns, a driving gear 24 is sleeved in a motor of the driving motor and drives the driving gear to rotate, a rotating arm on the upright column on the side is connected with the driving gear through a driving shaft 25, when the driving gear rotates, the driving shaft can be driven to rotate so as to drive the rotating arm of the upright column on the side to rotate, a synchronous belt 26 is sleeved on the driving gear, the synchronous belt is sleeved on the driven gear simultaneously, a driven shaft 27 penetrates through the upright column on the other side, and the rotating arm of the upright, the driven shaft is also linked with the gear shaft through a synchronous belt. Through the design, the two rotating arms can be simultaneously controlled to synchronously rotate by utilizing one driving motor to drive the workpiece to turn over, and the cost is greatly reduced due to the fact that one motor is saved while the purpose of turning over the workpiece is achieved.

The laser cutting machine of this embodiment can realize six-axis linkage at least, and is specific: the first shaft is used for lifting the main shaft, a laser head for welding is fixed at the bottom of the main shaft, and the main shaft is driven by a motor to vertically lift; the second shaft is used for the front-back translation of the workpiece, the workpiece is fixed on the bracket in a working mode, the bottom of the bracket is fixed on a group of guide rails, and the bracket can translate front and back on the guide rails so as to drive the workpiece to translate front and back; the third shaft is used for the left-right translation of the main shaft, a group of transverse sliding rails is arranged at the top of the machine frame, the main shaft is sleeved on the sliding rails through sliding blocks, and the sliding blocks can slide along the sliding rails so as to drive the main shaft to slide left and right along the sliding rails; the fourth shaft is used for rotating the laser head support, the laser head support is fixed at the bottom of the main shaft, and the main shaft can be driven to rotate, so that the laser head support is driven to rotate 360 degrees on the horizontal plane; the fifth shaft is used for rotating the laser head, a rotating shaft is arranged on the side surface of the laser head support, the laser head is sleeved on the rotating shaft, and when the rotating shaft rotates, the laser head can be driven to swing in a vertical plane around the rotating shaft; the sixth axis is the rotation of the workpiece itself, namely the workpiece is driven to turn over through two axes.

The six-axis linkage can ensure that the laser head can freely perform annular cutting around a workpiece, and the six-axis linkage can be realized, so that the laser cutting machine has high cutting efficiency, can perform cutting at multiple angles without stopping, has wide application range, does not need to be disassembled for multiple times and fixed again, and remarkably improves the cutting precision.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.