Laser head and processing equipment

Abstract

The laser head comprises a shell, a wind gathering cover, a radiator, engraving laser and a fan, the shell is connected with the wind gathering cover, the radiator and the fan are contained in the shell, an air channel communicated with the wind gathering cover is formed in the radiator, the radiator and the engraving laser are arranged between the fan and the wind gathering cover, and the radiator makes contact with the engraving laser. In the application, when the laser head emits laser to process the to-be-processed product, the fan in the laser head works, and air generated by the fan is blown out from the outlet of the air gathering cover at the bottom of the laser head through the air duct, communicated with the air gathering cover, of the radiator, so that smoke generated when the laser head processes the product is blown away from a working area; and smoke generated when the laser head processes products is prevented from entering the laser head to generate harmful effects on the laser head.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, in particular to a laser head and a processing device. BACKGROUND

[0002] When the laser head emits laser to process a product, smoke is easily generated during the processing of the product by the laser, which has a harmful effect on the processing of the laser head. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a laser head and a processing device which can prevent smoke generated during the processing of a product by emitted laser from entering the laser head.

[0004] In a first aspect, the present application provides a laser head, comprising a shell, a wind collecting cover, a heat sink, a carving laser and a fan, the shell is connected with the wind collecting cover, the heat sink and the fan are accommodated in the shell, the heat sink forms an air duct which is in communication with the wind collecting cover, the heat sink and the carving laser are arranged between the fan and the wind collecting cover, and the heat sink contacts the carving laser.

[0005] In some possible implementation manners, the heat sink comprises a plurality of heat dissipation fins, an air duct is formed between two adjacent heat dissipation fins, and the air duct is in communication with the gas collecting nozzle.

[0006] In some possible implementation manners, the heat sink comprises a plurality of heat dissipation fins, and the plurality of heat dissipation fins are integrally formed.

[0007] In some possible implementation manners, the laser head further comprises a gas collecting nozzle, the gas collecting nozzle comprises a hollow fixed part and a hollow protruding part, the fixed part is connected with the protruding part, and an outer side surface of the fixed part is connected with the wind collecting cover.

[0008] In some possible implementation manners, the fixed part of the gas collecting nozzle is connected to the wind collecting cover through a pipe thread, wherein the fixed part is an external thread, and the wind collecting cover is provided with an internal thread.

[0009] In some possible implementation manners, a protective mirror is arranged between the gas collecting nozzle and the carving laser.

[0010] In some possible implementation manners, the size of the gas collecting nozzle in the height direction is between 17.19 mm and 21.01 mm.

[0011] In some possible implementation manners, the wind collecting cover comprises a gas collecting nozzle mounting part, a cover body and a sensor mounting part, the gas collecting nozzle mounting part is connected with the cover body, the sensor mounting part is connected with the cover body, a sensor is arranged on the sensor mounting part, and the gas collecting nozzle mounting part is used for connecting the gas collecting nozzle.

[0012] In some possible implementation manners, the shell and the wind collecting cover are arranged along the height direction, and the wind collecting cover is gradually tapered away from the carving laser.

[0013] In some possible implementation manners, the inner surface of the cover body forms an angle with the height direction of 30°-38°.

[0014] In some possible implementation manners, the cover body is arranged around and connected to the gas collecting nozzle mounting portion.

[0015] In some possible implementation manners, the heat sink includes a plurality of heat dissipation fins, and a wind channel is formed between two adjacent heat dissipation fins, and the wind channel is in communication with the gas collecting nozzle.

[0016] In some possible implementation manners, a protection mirror is arranged between the gas collecting nozzle and the engraving laser.

[0017] In some possible implementation manners, the heat sink includes a plurality of heat dissipation fins, and the plurality of heat dissipation fins are integrally formed.

[0018] In some possible implementation manners, the laser head further includes a metal heat conduction sheet for connecting the heat sink and the engraving laser.

[0019] In a second aspect, the application provides a processing device, which includes a 3D printing head and the laser head of the first aspect, and the laser head is connected to the 3D printing head.

[0020] In the application, when the laser head emits laser to process a product, the fan in the laser head works, and the wind generated by the fan is blown out from the outlet of the air collecting cover at the bottom of the laser head through the wind channel in communication between the heat sink and the air collecting cover, so as to blow away the smoke generated when the laser head processes the product from the working area, and avoid the smoke generated when the laser head processes the product from entering the laser head to cause harmful effects. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or the background art, the drawings needed to be used in the embodiments of the application or the background art will be described below.

[0022] Figure 1 A processing device schematic diagram provided by an embodiment of the application;

[0023] Figure 2 An assembly drawing of the 3D printing head and the laser head provided by an embodiment of the application;

[0024] Figure 3 A cross-sectional view of the laser head provided by an embodiment of the application;

[0025] Figure 4 A three-dimensional structure schematic diagram of the gas collecting nozzle provided by an embodiment of the application;

[0026] Figure 5 A three-dimensional structure schematic diagram of the laser head after removing the shell provided by an embodiment of the application;

[0027] Figure 6 A top view of the laser head after the shell is removed according to an embodiment of the present application;

[0028] Figure 7 A perspective view of the wind collecting cover according to an embodiment of the present application;

[0029] Figure 8 A bottom view of the wind collecting cover according to an embodiment of the present application;

[0030] Figure 9 A sectional view of the wind collecting cover according to an embodiment of the present application.

[0031] Reference Signs

[0032] 100 - 3D printing head, 200 - laser head, 300 - guide, 400 - machining platform;

[0033] 205 - PCB board, 240 - wind collecting cover, 241 - gas collecting nozzle mounting part, 242 - cover body, 243 - sensor mounting part, 245 - gas collecting nozzle, 246 - fixing part, 247 - protruding part, 270 - shell, 272 - air pipe passage, 273 - carving laser, 274 - fan, 275 - protective mirror, 276 - heat conducting sheet, 280 - heat sink, 281 - heat dissipation sheet, 282 - air duct. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail below with reference to the drawings.

[0035] Please refer to Figure 1 and Figure 2 , the present application provides a machining device, which comprises a 3D printing head 100, a laser head 200, a guide 300 and a machining platform 400. In some feasible embodiments, the machining device is a gantry structure (as shown in Figure 1 ), the guide is supported by two Z-axis vertical columns, the guide can move up and down along the Z-axis, the 3D printing head can move along the guide in the Y-axis direction, and the machining platform moves in the X-axis direction. Alternatively, the machining device can be a corexy structure, the guide is supported by a frame on the machining device, the 3D printing head can move in the XY plane under the drive of a belt along the guide, and the machining platform is connected with a Z-axis screw rod to realize the movement in the Z-axis direction. Exemplarily, the guide can be at least one of a Y-axis linear rail, a carbon rod and an X-axis optical axis. Alternatively, the machining device can also be a cantilever structure, the guide is supported by a Z-axis column, the guide moves up and down along the Z-axis, the 3D printing head can move along the guide in the Y-axis direction, and the machining platform moves in the X-axis direction.

[0036] It should be understoodFigure 1 The above is only an example and does not limit the structure of the processing device. In the present application, unless otherwise specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense. For example, "fixation" can be fixed connection, detachable connection or integral; can be mechanical connection or electrical connection; can be direct connection or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise specified. "Connection" includes detachable connection and non-detachable connection, for example, fixed connection can include detachable fixed connection and non-detachable fixed connection, rotary connection can include detachable rotary connection and non-detachable rotary connection, sliding connection can include detachable sliding connection and non-detachable sliding connection. The connection can also be direct connection or indirect connection through a component. For example, for detachable fixed connection, the positional relationship between at least two objects connected in the installed state can be fixed; similarly, for rotary connection, sliding connection, etc.

[0037] In some possible embodiments, the processing platform 400 is used to provide a platform for the production and processing of the 3D printing head 100 and the laser head 200. The guide 300 is used to support the 3D printing head 100 and the laser head 200. The 3D printing head 100 is slidingly connected to the guide 300, and the 3D printing head 100 can slide linearly along the extension direction Y of the guide 300 or slide in the XY plane through a belt during processing. The guide 300 is movably connected between the frame of the processing platform 400, and the guide 300 can move along the X-axis direction relative to the frame of the processing platform 400, and the guide 300 can also move along the Z-axis direction relative to the frame of the processing platform 400. Further, the 3D printing head 100 follows the guide 300 to move along the X-axis direction relative to the frame of the processing platform 400, and the 3D printing head 100 follows the guide 300 to move up and down along the Z-axis direction relative to the frame of the processing platform 400. The sliding of the 3D printing head 100 along the extension direction Y of the guide 300, the movement of the 3D printing head 100 along the X-axis direction following the guide 300 and the up-and-down movement of the 3D printing head 100 along the Z-axis direction following the guide 300 can be coordinated by the stepping motor and the transmission system, so that the stepping motor drives the 3D printing head 100 to move accurately in three-dimensional space, and ensures that the material processed by the 3D printing head 100 is formed according to the designed trajectory.

[0038] 3D printing head is connected to the laser head, 3D printing head after printing products or in the process of printing, laser head of 3D printing products / partial products laser engraving, high energy density of laser beam makes material surface temperature rise, melt or gasification, thus forming the required pattern or text. Reduce the first installation 3D printing head, then disassemble 3D printing head, then install the steps of laser head, improve the production efficiency. Or, the laser head of processing consumables such as acrylic plate, wood, metal, glass, stainless steel, rock and other materials placed on the processing platform, the laser head can be processed in addition to 3D printing products of other products. The processing equipment of the application can realize 3D printing alone, can also realize laser engraving / cutting alone, can realize 3D printing and laser engraving / cutting. Through the laser head and 3D printing head share the same set of motion device such as guide rod / processing platform, etc., can realize a variety of different processing mode, such as printing, carving / cutting, printing, carving / cutting, printing, carving / cutting, etc., for complex product manufacturing provides a variety of possible, can further improve the efficiency of production and manufacturing, low cost.

[0039] Engraving, indicating the process of changing the appearance of the material without completely penetrating the material, by scoring, carving or other means to remove part of the material to create the desired shape, pattern or design. For example, by carving knife in the material surface carving fine lines and patterns, such as by laser beam in the material surface carving text or pattern.

[0040] Cutting, indicating the change of appearance, properties and / or state of the material, by mechanical force, heat, water or chemical means, the material is separated into two or more parts. Cutting can include, for example, to carry out the cutting, bleaching, curing, burning, etc. For example, using mechanical cutting, thermal cutting, water cutting or chemical cutting.

[0041] Please see Figure 3The laser head 200 includes a fan 274, a heat sink 280, a gas collecting nozzle 245, a gas pipe channel 272, a carving laser 273, a shell 270 and a wind collecting cover 240. The shell 270 is connected with the wind collecting cover 240, the heat sink 280 and the fan 274 are accommodated in the shell 270, the heat sink 280 and the carving laser 273 are arranged between the fan 274 and the wind collecting cover 240, and the heat sink 280 contacts the carving laser 273. The shell 270 is used for protecting the internal structure of the laser head 200. The wind collecting cover 240 is used for concentrating airflow, and the concentrated airflow is used for blowing away the smoke / dust generated by laser carving from a working area, so as to avoid the smoke from entering the laser head and affecting laser carving. The wind collecting cover 240 can also provide a mounting position for other elements of the laser head 200. The heat sink 280 and the fan 274 are used for dissipating heat of the carving laser 273, and the fan 274 blows air towards the heat sink 280 to accelerate heat dissipation. In the present application, the heat sink 280 contacts the carving laser 273, heat of the carving laser 273 can be directly conducted to the heat sink 280, and the heat sink 280 and the carving laser 273 can be connected through a metal heat conduction sheet 276, so that heat generated by the carving laser 273 can be transmitted to the heat sink 280 through the metal heat conduction sheet 276, the heat dissipation area of the carving laser is increased, and the heat dissipation rate of the carving laser is accelerated. The fan 274 is arranged above the heat sink 280 and the carving laser 273, when the laser head 200 starts to work, the carving laser 273 emits light through a laser exit port to perform laser carving on a product to be processed, at this time, heat generated by the carving laser 273 is transmitted to the heat sink 280 through the metal heat conduction sheet 276, the fan 274 blows air to the heat sink 280, the air blown by the fan 274 passes through the heat sink 280 and is discharged from an outlet of the wind collecting cover 240, and heat of the heat sink 280 is transmitted out.

[0042] The gas pipe channel 272 is located on the other side of the carving laser 273 away from the heat sink 280, and is connected with a gas pump. When the carving laser 273 works, the gas pump connected with the gas pipe channel 272 works to form a downward airflow in the gas pipe channel 272. The airflow blows away smoke / dust generated by laser carving from a working area through the gas collecting nozzle 245, so as to avoid the smoke / dust from entering the carving laser and the laser head and affecting laser carving.

[0043] The processing device further comprises a gas pipe, a gas collecting nozzle 245 is arranged below the engraving laser 273, and the gas collecting nozzle 245 is funnel-shaped. One end of the gas pipe channel 272 is in communication with the gas pipe for connecting the air pump, and the other end of the gas pipe channel 272 is in communication with the gas collecting nozzle 245. The air pump, the gas pipe, the gas pipe channel 272 and the gas collecting nozzle 245 work together during laser engraving. The air pump outputs airflow, and the airflow forms a positive pressure at the gas collecting nozzle 245 through the gas pipe and the gas pipe channel 272, blows away the smoke / dust generated by laser engraving from the working area, and avoids the smoke / dust from entering the inside of the engraving laser 273 and the laser head 200 to affect the laser engraving. The quality of the laser engraving is affected. The structure of the gas collecting nozzle 245 can be designed in a multi-hole type, which uniformly distributes the airflow through multiple small holes to ensure that the smoke can be more effectively blown away from the working area. The material of the gas collecting nozzle 245 can be a metal material, such as stainless steel or aluminum alloy, to ensure the durability and corrosion resistance of the gas collecting nozzle 245.

[0044] A protective mirror 275 is arranged between the gas collecting nozzle 245 and the engraving laser 273. The dust, smoke and debris generated during the laser engraving process of the laser head 200 can adhere to the optical elements of the engraving laser 273, such as lenses and mirrors, which can reduce the transmission efficiency of the laser beam or even damage the optical elements. The protective mirror 275 is located between the gas collecting nozzle 245 and the engraving laser 273, and serves as the first line of defense to block these pollutants from entering the optical system. The material of the protective mirror 275 is high-strength and wear-resistant, such as quartz glass or sapphire glass. In this application, when the laser head 200 is not installed with the gas pipe channel 272, the wind blown by the fan 274 can also be used to form a positive pressure at the laser exit port, avoiding the debris generated during laser engraving from adhering to the protective mirror 275, thereby prolonging the service life of the protective mirror 275.

[0045] Please refer to Figure 4The gas collecting nozzle 245 includes a hollow fixed part 246 and a hollow protruding part 247, the fixed part 246 is connected with the protruding part 247, the fixed part 246 of the gas collecting nozzle 245 is connected to the wind collecting cover 240 through a pipe thread, wherein the fixed part 246 is an external thread, and the wind collecting cover 240 is provided with an internal thread. The gas collecting nozzle 245 can be removed from the wind collecting cover 240, so that the whole gas collecting nozzle 245 is removed from the laser head 200. The wind collecting cover 240 absorbs part of the height of the gas collecting nozzle, reducing the height of the whole laser head. In this application, the gas collecting nozzle 245 is arranged below the engraving laser 273, the size of the gas collecting nozzle 245 in the height direction is between 17.19mm-21.01mm, and the gas collecting nozzle 245 is completely accommodated in the wind collecting cover 240. For example, the engraving laser adopts an engraving laser with a focal length of 40mm, that is, the distance from the laser exit port of the engraving laser 273 to the surface of the processed product is 40mm. The distance from the focal point of the engraving laser 273 to the bottom surface of the nozzle of the 3D printing head is 20.9mm, which can meet various scenarios of laser non-planar, such as printing bowls or plates with large surface differences. At this time, the distance from the laser exit port of the engraving laser to the bottom surface of the nozzle of the 3D printing head is 19.1mm, and the gas collecting nozzle 245 needs to be installed within the height size of 19.1mm. In addition to the 1.6mm allowance of the nozzle of the 3D printing head below the bottom surface of the laser head 200, the gas collecting nozzle 245 with a size of 17.19mm-21.01mm does not exceed the height size and does not interfere with the movement of the 3D printing head.

[0046] In some possible embodiments, the 3D printing head 100 is provided with a camera, and the laser head 200 is provided with a line laser, the laser head 200 is mounted on the 3D printing head 100, the emission direction of the line laser forms an angle with the optical axis of the camera, and the optical axis of the camera is parallel to the height direction of the laser head 200. For example, a line laser head is arranged on one side of the laser head 200, the line laser head emits a slant line laser, and the focal point of the slant line laser falls within the field of view of the camera, which cooperates with the camera to measure the height of the 3D printing head 100 and the processing platform 400. The focal length of the line laser is equal to the height of the focal point of the engraving laser 273, so that after the height between the 3D printing head 100 and the processing platform 400 is measured, the engraving laser 273 quickly enters the height to be engraved, without the need for the laser head 200 to perform preparation work again, thereby improving the working efficiency of the processing equipment and avoiding the repeated lifting of the laser head 200 or the processing platform 400.

[0047] Please refer to Figure 5 and Figure 6The heat dissipation fins 281 are arranged at intervals on the heat sink 280, and the air ducts 282 are formed between the adjacent heat dissipation fins 281. The air ducts 282 are in communication with the air collecting cover 240. The air ducts 282 and the heat dissipation fins 281 on the heat sink 280 are a compact integrated structure, which reduces the production cost of the laser head 200. The heat dissipation fins 281 can be made of high-thermal-conductivity materials, such as aluminum, copper or aluminum alloy, so that the heat can be quickly transferred from the engraving laser 273 to the surface of the heat dissipation fins 281. The air ducts 282 formed by the heat dissipation fins 281 arranged at intervals are in communication with the air collecting cover 240, so that the air in the upper and lower parts of the laser head 200 housing 270 can be in convection. The fan 274 blows air to the heat dissipation fins 281, accelerates the air flow on the surface of the heat dissipation fins 281, increases the air disturbance, and improves the convection heat dissipation efficiency.

[0048] The laser head 200 includes a PCB board 205 provided with components. The PCB board 205 is placed along the height direction of the heat sink 280, and the side of the PCB board 205 provided with the components faces the heat sink 280. The heat sink 280 is provided with a limiting groove with a height adapted to the components. The heat sink 280 is provided with a limiting groove on the side away from the engraving laser 273, which is used to limit the position of the PCB board 205, so that the PCB board 205 is fixed on the heat sink 280. At the same time, the heat generated by the components on the PCB board 205 is transferred to the heat sink 280 through the limiting groove, and is dissipated by the heat sink 280. Placing the components of the PCB board 205 towards the heat sink 280 avoids the components on the PCB board 205, especially the electrolytic capacitor, occupying the width dimension of the laser head. Especially in the application scenario of high-power engraving laser, the die of the engraving laser needs to occupy more space. The structure of the laser head 200 can still be made compact, the weight of the laser head is light, and it is easy to control.

[0049] In the present application, the PCB board 205 provided with components can be provided with a lamp strip of multiple LED lamps. The lamp strip is used to prompt the working state of the laser head 200 through light language. For example, the lamp strip is bright red, indicating that the laser head 200 has been connected to the power supply; the lamp strip is bright yellow, indicating that the laser head 200 is in standby state; the lamp strip is bright green, indicating that the laser head 200 is in working state; and the lamp strip is off, indicating that the laser head 200 is not connected to the power supply at this time.

[0050] Please refer to Figure 7, the air duct 282 guides the airflow to be discharged from the outlet of the air concentrator 240 away from the engraving laser 273, and the outlet face of the air concentrator 240 and the side face of the air concentrator 240 form an obtuse angle at the tapering part of the air concentrator 240, so that the air concentrator 240 concentrates air more. After the inlet of the air concentrator 240 is communicated with the air duct 282, the air duct 282 guides the airflow to be discharged from the outlet of the air concentrator 240 away from the engraving laser 273, and the cross-sectional area of the outlet of the air concentrator 240 is smaller than that of the inlet of the air concentrator 240, so that the flow rate of the air is increased, and the heat dissipation efficiency of the laser head 200 is improved.

[0051] Please refer to Figure 8 , the air concentrator 240 includes a nozzle mounting part 241, a cover body 242, and a sensor mounting part 243. The nozzle mounting part 241 is connected with the cover body 242, the sensor mounting part 243 is connected with the nozzle mounting part 241, and a sensor is arranged on the sensor mounting part 243. Please refer to Figure 9 , the nozzle mounting part 241 is used for connecting the nozzle 245, the cover body 242 surrounds and is connected with the nozzle mounting part 241, the cover body 242 is connected with the shell 270, the air concentrator 240 is tapered away from the engraving laser 273, the inner surface of the cover body 242 forms an angle a with the air concentrator 240, for example, the inner surface of the cover body 242 forms an angle a of 30°-38° with the height direction of the air concentrator 240, so that the air concentrator 240 concentrates air more. The nozzle mounting part 241 of the air concentrator 240 is used for connecting the nozzle 245, so that the nozzle 245 is positioned with the air concentrator 240, and at the same time, it is ensured that the engraving laser 273 can be emitted from the nozzle 245 to perform laser engraving on the product.

[0052] The sensor installed on the sensor mounting portion 243 is used to detect the distance between the laser head 200 and the processing product. The processing equipment adjusts the processing distance between the laser head 200 and the processing product by analyzing the distance between the gas collecting nozzle mounting portion 241 and the processing product detected by the sensor. In this application, the sensor installed on the sensor mounting portion 243 is an infrared sensor used to detect the distance. The sensor installed on the sensor mounting portion 243 also includes a sensor used to detect the temperature and the flame. When the temperature generated during the processing of the laser head 200 is greater than the safe temperature, the control of the laser head 200 suspends the operation. When the sensor detects that the temperature value of the flame generated during the processing exceeds the safe value, the control of the laser head 200 suspends the operation. In this application, the sensor used to detect the temperature and the flame is an NTC (Negative Temperature Coefficient) sensor, which is installed on the sensor mounting portion 243 of the wind collecting cover 240. During the processing of the laser head 200, the NTC sensor detects the temperature of the lower surface of the laser head 200 and transmits the temperature value to the processor. When the temperature exceeds the set value, the processor controls the laser head 200 to suspend the operation. During the processing of the laser head 200, if the laser head 200 generates a flame, the NTC sensor detects the temperature of the flame. When the NTC sensor detects that the temperature of the flame exceeds the safe value, it transmits a signal to the processor, and the processor controls the laser head 200 to suspend the operation. The processor is arranged in the laser head 200 or in the processing equipment.

[0053] The cover body 242 is connected with the shell 270, realizing the integration of the wind collecting cover 240 and the shell 270, so that the wind collecting cover 240 and the shell 270 together protect the equipment inside the laser head 200. The wind collecting cover 240 is gradually tapered away from the direction of the engraving laser 273, so that the cross-sectional area of the outlet of the wind collecting cover 240 is smaller than that of the inlet of the wind collecting cover 240. At the tapered portion of the wind collecting cover 240, the cross-sectional area of the outlet of the wind collecting cover 240 is smaller than that of the inlet of the wind collecting cover 240, which increases the flow rate of air and improves the heat dissipation efficiency of the laser head. At the tapered portion of the wind collecting cover 240, the outlet face of the wind collecting cover 240 and the side face of the wind collecting cover 240 form an obtuse angle, so that the wind collecting cover 240 collects more wind.

[0054] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality indications will also change accordingly.

[0055] In addition, the descriptions such as "first", "second", etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0056] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope of the present application.

[0058] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A laser head, characterized by The laser head comprises a housing, a wind collecting cover, a heat sink, a carving laser and a fan, the housing is connected with the wind collecting cover, the heat sink and the fan are accommodated in the housing, the heat sink is formed with an air duct communicating with the wind collecting cover, the heat sink and the carving laser are arranged between the fan and the wind collecting cover, and the heat sink contacts the carving laser.

2. The laser head of claim 1, wherein The heat sink comprises a plurality of heat dissipation fins, and the air duct is formed between two adjacent heat dissipation fins and communicates with the wind collecting cover.

3. The laser head of claim 1, wherein The heat sink comprises a plurality of heat dissipation fins, and the plurality of heat dissipation fins are integrally formed.

4. The laser head of claim 1 wherein, The laser head further comprises a gas collecting nozzle, the gas collecting nozzle comprises a hollow fixed part and a hollow protruding part, the fixed part is connected with the protruding part, and the outer side surface of the fixed part is connected with the wind collecting cover.

5. The laser head of claim 4, wherein the laser head is configured to be mounted on a robot arm. The fixed part of the gas collecting nozzle is connected to the wind collecting cover through a pipe thread, wherein the fixed part is an external thread, and the wind collecting cover is provided with an internal thread.

6. The laser head of claim 4 wherein, A protective mirror is arranged between the gas collecting nozzle and the carving laser.

7. The laser head of claim 4 wherein the laser head is configured to be mounted on a robot arm. The size of the gas collecting nozzle along the height direction is between 17.19mm and 21.01mm.

8. The laser head of claim 4 wherein, The wind collecting cover comprises a gas collecting nozzle mounting part, a cover body and a sensor mounting part, the gas collecting nozzle mounting part is connected with the cover body, the sensor mounting part is connected with the cover body, a sensor is arranged on the sensor mounting part, and the gas collecting nozzle mounting part is used for connecting the gas collecting nozzle.

9. The laser head of claim 8, wherein, The housing and the wind collecting cover are arranged along the height direction, and the wind collecting cover is gradually tapered away from the carving laser.

10. The laser head of claim 9, wherein, The inner surface of the cover body forms an angle with the height direction, and the angle is between 30° and 38°.

11. The laser head of claim 8 wherein, The cover body surrounds and is connected with the gas collecting nozzle mounting part.

12. The laser head of claim 1 wherein, The laser head further comprises a metal heat conducting sheet for connecting the heat sink and the carving laser.

13. A processing apparatus characterized by comprising: The processing equipment comprises a 3D printing head and a laser head as claimed in any one of claims 1-12, and the laser head is connected with the 3D printing head.

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