CN110788491A

CN110788491A - Laser cutting machine

Info

Publication number: CN110788491A
Application number: CN201910960614.7A
Authority: CN
Inventors: 杨璐嘉; 梁昊毓; 吕晓磊; 吴振宇
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-02-14

Abstract

The invention relates to the technical field of laser cutting, in particular to portable laser cutting equipment without limiting a processing area. The invention comprises the following steps: the device comprises a mounting bracket, a laser, a movement device, a driving device and a battery; the laser is arranged on the upper part of the mounting bracket; the battery is arranged on the upper part of the mounting bracket and is respectively arranged on two sides of the cutting device; the driving device is arranged on the mounting bracket through a hexagonal stud, is seated on the battery and is supported and fixed through the battery; the movement device is arranged at the lower part of the mounting bracket; the driving device is connected with the battery, the cutting device and the moving device through leads to control the operation of each device. The technical scheme of the invention solves the problems in the prior art that: the existing cutting machine has complex and heavy structure and large occupied space; the cutting range is fixed, and the forming of a larger workpiece can not be completed at one time.

Description

Laser cutting machine

Technical Field

The invention relates to the technical field of laser cutting, in particular to portable laser cutting equipment without limiting a processing area.

Background

With the wide application of laser cutting machines in various industries, especially in recent years, laser cutting is used as a fast and efficient processing mode by more and more universities, laboratories and personal studios, and the research on laser cutting machines is more and more important. The traditional laser cutting machine is generally very heavy and mainly provided with a peripheral frame, and the movement of a laser head in the frame is realized through a synchronous belt or a screw rod, so that the cutting function is realized, and the traditional laser cutting machine needs to occupy a very large placing space, so that the traditional laser cutting machine cannot be portable; in addition, the conventional laser cutting machine generally has a fixed processing range, which depends on the movement stroke of the laser head, so that it cannot perform one-step forming on a large workpiece.

In view of the above problems in the prior art, it is necessary to develop a novel laser cutting machine to overcome the problems in the prior art.

Disclosure of Invention

According to the prior art mentioned above, it is proposed: the existing cutting machine has complex and heavy structure and large occupied space; the cutting range is fixed, and the forming of a larger workpiece can not be completed at one time, thereby providing a laser cutting machine. The laser head is mainly designed to be portable by mounting the laser head on a trolley provided with omnidirectional wheels, and the trolley moves in all directions flexibly to perform cutting work, so that large-range movement is realized, and one-step forming of a large workpiece is completed; meanwhile, the small machine body can be conveniently carried.

The technical means adopted by the invention are as follows:

a laser cutting machine includes: the device comprises a mounting bracket, a laser, a movement device, a driving device and a battery; the laser is arranged on the upper part of the mounting bracket; the battery is arranged on the upper part of the mounting bracket and is respectively arranged on two sides of the cutting device; the driving device is arranged on the mounting bracket through a hexagonal stud, is seated on the battery and is supported and fixed through the battery; the movement device is arranged at the lower part of the mounting bracket; the driving device is connected with the battery, the cutting device and the moving device through leads to control the operation of each device.

Further, the mounting bracket includes: the cutting device mounting bracket and the moving device mounting bracket; the cutting device mounting bracket is arranged on the movement device mounting bracket; the exercise device mounting bracket includes: a base and a motor mounting bracket; the base is of a triangular plate-shaped structure, and a through hole is processed in the center of the base; each corner of the base is fixedly provided with a motor mounting bracket through a screw and a nut; the cutting device mounting bracket is a laser mounting bracket and is fixedly arranged on the base; and a reinforcing rib plate is arranged on the laser mounting bracket and used for further ensuring the rigidity.

Furthermore, the laser is arranged on the laser mounting bracket, and the laser emitting end of the laser penetrates through the through hole in the center of the base and is vertically downward; a focusing lens is arranged at the laser emitting end of the laser; and a heat radiation fan is arranged on the laser.

Further, the telecontrol equipment is three sets, and every set all includes: the direct current speed reducing motor, the coupler and the omnidirectional wheel; the direct current speed reducing motor is arranged at the lower part of the base and is fixed on the motor mounting bracket through a motor mounting screw, an output shaft of the direct current speed reducing motor penetrates through a through hole on the motor mounting bracket, and a coupling is arranged on the output shaft; the omnidirectional wheel is connected with the coupling through an omnidirectional wheel mounting screw; the direct-current speed reduction motor transmits the torque to the omnidirectional wheel through the coupler, so that power is provided for the movement of the cutting machine; the omnidirectional wheels of the three sets of motion devices are matched to move, so that flexible motion on a two-dimensional plane can be completed.

Furthermore, the driving device is arranged in the driving circuit mounting box base and the driving circuit mounting box cover and is fixed on the base through a hexagonal stud; the drive device includes: the system comprises a master control board, a laser driving circuit and a motor driving circuit; the master control board is used for storing and analyzing the processing mode and the processing path of the workpiece, so as to give control signals for the laser driving circuit and the motor driving circuit; the laser driving circuit controls the laser through the amplifying circuit and the control signal; the motor driving circuit completes control on the direct current speed reducing motor through the amplifying circuit and the control signal.

Furthermore, the battery is composed of two high-rate lithium batteries and is respectively arranged on two sides of the laser, so that the space can be better utilized; meanwhile, the high-rate lithium battery is high in energy density and large in discharge current, and continuous work of the laser can be met.

Furthermore, an encoder is installed at the rear part of the direct current speed reducing motor and used for completing closed-loop feedback control on the direct current speed reducing motor.

Further, the front part of the laser mounting bracket is designed with a radiating fin structure so as to radiate heat from the side contacting with the laser.

Compared with the prior art, the invention has the following advantages:

1. according to the laser cutting machine provided by the invention, the cutting device and the moving device are combined, so that a heavy frame can be avoided, the size and the weight of equipment are reduced, the equipment is more portable, and the limit of the traditional frame to the working stroke of a laser is eliminated, so that the cutting machine has the characteristic of large working stroke.

2. According to the laser cutting machine, the movement device is composed of three direct current speed reducing motors and an omnidirectional wheel which are 120 degrees mutually on the chassis, and the three motors can flexibly and freely move on a two-dimensional working plane through movement, so that the weight of the structure is reduced, and the maintainability and the reliability of the whole system are improved.

In conclusion, the technical scheme of the invention solves the problems of complex structure, heavy weight and large occupied space in the prior art; the cutting range is fixed, and the forming of a larger workpiece can not be completed at one time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is an isometric view of the present invention 1;

FIG. 2 is an isometric view of the present invention;

FIG. 3 is a schematic view of a motor assembly according to the present invention;

FIG. 4 is a top view of the present invention;

FIG. 5 is a bottom view of the present invention;

FIG. 6 is a control flow chart of the present invention.

In the figure: 1. the device comprises a battery 2, a drive circuit mounting box cover 3, a drive circuit mounting box base 4, a hexagonal stud 5, a base 6, a motor mounting support 7, a direct-current speed reducing motor 8, a screw 9, a nut 10, an omnidirectional wheel 11, an omnidirectional wheel mounting screw 12, a coupler 13, a motor mounting screw 14, a laser 15, a cooling fan 16, a laser mounting support 17, a set screw 18, an encoder 19 and a focusing lens.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The present invention provides a laser cutting machine comprising: a mounting bracket, a laser 14, a moving device, a driving device and a battery 1;

as shown in fig. 1-3 and 5, the exercise device includes three sets of exercise modules, each set of exercise modules including: a direct current speed reducing motor 7 and an omnidirectional wheel 10; the direct-current speed reducing motor 7 is mounted on the motor mounting bracket 6 through a motor mounting screw 13, wherein an output shaft of the direct-current speed reducing motor 7 penetrates through a through hole in the middle of the motor mounting bracket 6 and is connected with the coupler 12 through a fastening screw 17; the other end of the coupling 12 is mounted on the omni wheel 10 by an omni wheel mounting screw 11. Three sets of motion modules are installed on the base 5 through the screws 8 and the nuts 9, wherein the three sets of motion modules are uniformly distributed on the circular base 5 and form an angle of 120 degrees with each other.

The output shaft of the direct current speed reduction motor 7 is a D-shaped shaft, so that torque can be better transmitted, and meanwhile, the shaft coupling 12 is provided with a fastening screw 17, so that the output shaft of the direct current speed reduction motor 7 can be more firmly fixed.

An encoder 18 is installed at the tail of the direct current speed reducing motor 7, and the motion state of the direct current speed reducing motor 7 can be fed back in real time, so that closed-loop control over the working state is achieved.

As shown in fig. 1, 2, 4 and 5, the cutting device includes a main body: the laser device comprises a heat radiation fan 15 and a laser device 14, wherein the laser device 14 is arranged on a laser device mounting bracket 16 through a screw 8, and the hot air fan 15 is arranged on the laser device 14 and can take away heat generated by the laser device 14 during long-time work; wherein, the laser mounting bracket 16 is mounted on the base 5 through the screw 8 and the nut 9.

The front part of the laser mounting bracket 16 is designed with a radiating fin structure so as to radiate heat from the side contacting with the laser 16; the laser mounting bracket 16 is further designed with a rib plate, so that the structural rigidity of the laser mounting bracket can be increased, and the precision requirement under the working state can be met.

The batteries 1 are high-rate lithium batteries and are respectively arranged on two sides of the upper part of the base 5, so that most of the structural weight can be concentrated in the center of the base 5, and the structure has great symmetry.

The drive circuit mounting box includes: the drive circuit mounting box cover 2 and the drive circuit mounting box base 3 can provide protection for the whole drive circuit, wherein the drive circuit mounting box is mounted on the base 5 through the hexagonal stud 4, so that the space utilization rate of the whole base 5 can be improved, and meanwhile, a chip in the drive circuit can be placed in the center of the base plate 5 as much as possible, and the control precision is improved.

As shown in fig. 6, the control flow includes battery supply, laser control, and traveling mechanism control.

The battery 1 supply section includes: the laser power supply device comprises a battery 1, a voltage reduction module, a driving board, a direct current speed reduction motor 7, a laser 14 and a cooling fan 15, wherein the battery 1 directly supplies power for the laser 14, the battery 1 supplies power for a main control board after being subjected to voltage reduction by the voltage reduction module, the battery 1 supplies power for the direct current speed reduction motor 7 through the driving board, and the main control board supplies power for the cooling fan 15;

the laser 14 control section includes: the laser engraving machine comprises a main control board, a cooling fan 15, a laser 14 and a temperature sensor, wherein the main control board sends a control signal to the laser 14, the laser irradiation starting, stopping and power of the laser are controlled according to a required engraving path, the main control board obtains a laser temperature signal through the temperature sensor, the cooling fan 15 is controlled to start, stop and rotate according to the laser temperature, and the fact that the working efficiency or the laser 14 is not affected or burnt due to overhigh working temperature is guaranteed.

The traveling mechanism control section includes: the main control board, the drive plate, direct current gear motor 7, encoder 18, wherein the main control board sends control signal to the drive plate, stops through opening of drive plate control direct current gear motor 7, direction of rotation and rotational speed, the main control board acquires direct current gear motor 7's motion state signal through the encoder, the control signal of sending for the drive plate is adjusted after the analysis processing, forms closed-loop control to direct current gear motor 7, makes the motion of main control board control direct current gear motor 7 that can be more accurate.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser cutting machine, characterized in that said laser cutting machine comprises: the device comprises a mounting bracket, a laser (14), a movement device, a driving device and a battery (1);

the laser (14) is arranged on the upper part of the mounting bracket; the battery (1) is arranged on the upper part of the mounting bracket and is respectively arranged on two sides of the cutting device; the driving device is arranged on the mounting bracket through a hexagonal stud (4), is seated on the battery (1) and is supported and fixed through the battery (1); the movement device is arranged at the lower part of the mounting bracket; the driving device is connected with the battery (1), the cutting device and the moving device through leads to control the operation of each device.

2. The laser cutting machine of claim 1, wherein the mounting bracket comprises: the cutting device mounting bracket and the moving device mounting bracket; the cutting device mounting bracket is arranged on the movement device mounting bracket;

the exercise device mounting bracket includes: a base (5) and a motor mounting bracket (6); the base (5) is of a triangular plate-shaped structure, and a through hole is processed in the center of the base; each corner of the base (5) is fixedly provided with a motor mounting bracket (6) through a screw (8) and a nut (9);

the cutting device mounting bracket is a laser mounting bracket (16) and is fixedly arranged on the base (5); and a reinforcing rib plate is arranged on the laser mounting bracket (16) and used for further ensuring the rigidity.

3. The laser cutting machine according to claim 1, characterized in that the laser (14) is mounted on a laser mounting bracket (16), and a laser emitting end of the laser (14) passes through a through hole in the center of the base (5) and is vertically downward; a focusing lens (19) is arranged at the laser emitting end of the laser (14); a heat radiation fan (15) is arranged on the laser (14).

4. The laser cutting machine according to claim 1, wherein the moving means are three sets, each set comprising: the direct current speed reducing motor (7), the coupler (12) and the omnidirectional wheel (10); the direct current gear motor (7) is arranged at the lower part of the base (5) and is fixed on the motor mounting bracket (6) through a motor mounting screw (13), the output shaft of the direct current gear motor passes through a through hole on the motor mounting bracket (6), and a coupling (12) is arranged on the output shaft; the omnidirectional wheel (10) is connected with the coupling (12) through an omnidirectional wheel mounting screw (11); the direct-current speed reducing motor (7) transmits torque to the omnidirectional wheel (10) through the coupler (12), so that power is provided for the movement of the cutting machine; the omnidirectional wheels (10) of the three sets of motion devices are matched to move, and flexible motion on a two-dimensional plane can be completed.

5. The laser cutting machine according to claim 1, characterized in that the driving device is mounted in the driving circuit mounting box base (3) and the driving circuit mounting box cover (2) and fixed on the base (5) through a hexagonal stud (4); the drive device includes: the system comprises a master control board, a laser driving circuit and a motor driving circuit;

the master control board is used for storing and analyzing the processing mode and the processing path of the workpiece, so as to give control signals for the laser driving circuit and the motor driving circuit;

the laser driving circuit controls the laser (14) through an amplifying circuit and a control signal;

the motor driving circuit controls the direct current speed reducing motor (7) through the amplifying circuit and the control signal.

6. The laser cutting machine according to claim 1, characterized in that the battery (1) is composed of two high-rate lithium batteries, which are respectively installed on both sides of the laser (14), so as to better utilize space; meanwhile, the high-rate lithium battery has high energy density and large discharge current, and can meet the continuous work of the laser (14).

7. The laser cutting machine according to claim 4, characterized in that the DC gear motor (7) is provided with an encoder (18) at the rear for performing closed-loop feedback control on the DC gear motor (7).

8. The laser cutting machine according to claim 3, characterized in that the front part of the laser mounting bracket (16) is designed with a heat sink structure to dissipate heat from the side in contact with the laser (14).