US-20260124703-A1 - DETECTION ASSEMBLY, LASER ASSEMBLY, AND LASER PROCESSING EQUIPMENT

US20260124703A1US 20260124703 A1US20260124703 A1US 20260124703A1US-20260124703-A1

Abstract

The present application relates to a technique field of laser processing, aiming to solve problem of lens defects or impurities affecting normal laser emission during laser processing or causing excessive absorption of laser energy by the lens. The application discloses a detection assembly, laser assembly, laser emission control method, and laser processing equipment. The detection assembly includes a first circuit board. The first circuit board includes a substrate and a temperature sensor. The substrate is provided with a first via allowing laser emitted by the laser generator to pass. The temperature sensor is positioned on a surface of the substrate outside the first via and is directly thermally or indirectly thermally coupled to a to-be-inspected lens located in a laser path of the laser generator. The beneficial effect of the present application is the ability to detect the temperature of the lens conveniently without affecting the laser emission.

Inventors

Huilin LIU
MINGWEN LI
Fayang Cao

Assignees

SHENZHEN CREALITY 3D TECHNOLOGY CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20230630
Priority Date: 20221014

Claims (20)

1 . A detection assembly capable of detecting a temperature of a to-be-inspected lens of a laser assembly, the laser assembly comprising a laser generator, the detection assembly comprising: a first circuit board comprising a substrate and a temperature sensor, wherein the substrate is provided with a first via allowing laser emitted by the laser generator to pass, the temperature sensor is positioned on a side surface of the substrate and is in an area outside the first via, and the temperature sensor is directly thermally or indirectly thermally coupled to the to-be-inspected lens located in a laser path of the laser generator.
2 . The detection assembly of claim 1 , wherein the detection assembly further comprises a plurality of temperature sensors, including the temperature sensor, the plurality of temperature sensors is distributed in a circumferential direction of the first via at intervals.
3 . The detection assembly of claim 1 , wherein the detection assembly further comprises a thermal conductive structure, the thermal conductive structure is annular and comprises a second via, the second via corresponds to the first via, one side of the thermal conductive structure is thermally coupled to the temperature sensor and another side of the thermal conductive structure is thermally coupled to the to-be-inspected lens.
4 . The detection assembly of claim 1 , wherein the detection assembly further comprises a connection member, the first circuit board is connected to the laser generator through the connection member.
5 . The detection assembly of claim 1 , wherein the detection assembly further comprises a mounting plate, the mounting plate is coupled with the laser generator and presses the to-be-inspected lens against the temperature sensor.
6 . The detection assembly of claim 5 , wherein the mounting plate comprises a first surface and a second surface opposite each other, the first surface is coupled with the laser generator, the first surface is concaved to form a relief groove for receiving the substrate.
7 . The detection assembly of claim 6 , wherein the mounting plate further comprises a first through-hole, the first through-hole is concaved from a bottom surface of the relief groove and extends through to the second surface, the first through-hole corresponds to the first via and allows the laser to pass through, and a part of the first through-hole near the first circuit board is expanded to form a first reaming hole, the first reaming hole receives the to-be-inspected lens.
8 . The detection assembly of claim 7 , wherein the detection assembly further comprises an annular elastic gasket, the annular elastic gasket is placed in the first reaming hole, one side of the annular elastic gasket presses against a bottom surface of the first reaming hole, another side of the annular elastic gasket elastically presses the to-be-inspected lens against the first circuit board.
9 . The detection assembly of claim 7 , wherein, the mounting plate further comprises an airflow channel, the mounting plate further comprises an air opening that is concaved from the bottom surface of the relief groove and connected to the airflow channel, the air opening is spaced from the first through-hole, and the first circuit board further comprises an air pressure sensor, the air pressure sensor is positioned on the substrate, the substrate covers the air opening, and the air pressure sensor is located within the air opening to detect a pressure inside the airflow channel.
10 . The detection assembly of claim 9 , wherein the airflow channel is provided with an airflow inlet and an airflow outlet, the airflow inlet extends to the first surface, the airflow outlet communicates with a part of the first through-hole located on a side of the to-be-inspected lens away from the first circuit board.
11 . The detection assembly of claim 10 , wherein the mounting plate further comprises a base plate, a cover, and a plug, a lower surface of the base plate comprises a recessed groove, and the cover is covered on the recessed groove, a communicating hole is defined on the cover, the communicating hole acts as the airflow inlet, the recessed groove and the relief groove are spaced apart, a depth of the recessed groove is greater than a depth of the relief groove, a thru hole is defined on the base plate, the thru hole extends from a side surface of the base plate under the bottom surface of the relief groove and extends to a side of recessed groove, the thru hole laterally communicates with the first through-hole, the thru hole acts as the airflow outlet, and the air opening communicates with the thru hole, the plug seals an opening of the thru hole on the side surface of the base plate.
12 . The detection assembly of claim 11 , wherein the base plate comprises a middle plate portion and heat dissipation fins, the middle plate portion is extended in a second direction, the heat dissipation fins are located on both sides of the middle plate portion in a first direction, the first direction and the second direction are perpendicular to each other, and the relief groove is defined on the middle plate portion, the recessed groove comprises a first groove section and a second groove section, the first groove section is spaced apart from the relief groove in the first direction, and the first groove section is located between the relief groove and the heat dissipation fins on one side; an end of the second groove section is communicated with the first groove section, another end of the second groove section extends in the first direction and corresponds to the communicating hole near a corner of the base plate, and the thru hole extends in the first direction to pass through an underside of the relief groove, and the thru hole communicates with the first groove section.
13 . The detection assembly of claim 7 , wherein the mounting plate further comprises a second through-hole, the second through-hole is recessed from the bottom surface of the relief groove and extends through to the second surface, the second through-hole is spaced apart from the first through-hole, the first circuit board further comprises a flame sensor for detecting a presence of a flame, the flame sensor is positioned on the substrate and corresponds to the second through-hole, and the laser assembly further comprises a second lens, the second lens is positioned on a side of the second through-hole away from the laser generator, and the flame sensor corresponds to the second lens.
14 . A laser assembly comprising: the laser generator for emitting a laser; the detection assembly of claim 1 ; and a first lens, acting as the to-be-inspected lens, the first lens is located in the laser path of the laser generator, and the first lens is directly thermally or indirectly thermally coupled to the temperature sensor.
15 . The laser assembly of claim 14 , further comprises: a cooling fan, connected to a side of the laser generator away from the detection assembly; a circuit board connected to a side of the cooling fan away from the laser generator, the circuit board being electrically connected to the first circuit board, the circuit board receiving and processing temperature signals sent by the first circuit board, and the circuit board controlling the laser generator to emit the laser based on the temperature signals; a top plate spaced apart from the circuit board and connected to a side of the circuit board away from the cooling fan; and a shell surrounding a periphery of the circuit board, the cooling fan, the laser generator, and the detection assembly, an end of the shell being covered by the top plate.
16 . The laser assembly of claim 15 , wherein the detection assembly further comprises a mounting plate, the mounting plate is connected to an emission side of the laser generator, and the mounting plate comprises a first through-hole allowing the laser to pass, the mounting plate further comprises an exposed portion, the exposed portion protrudes beyond a side of the laser generator, an airflow channel is defined on the mounting plate, the airflow channel comprises an airflow inlet and an airflow outlet, the airflow inlet extends to a side of the exposed portion facing the laser generator, the airflow outlet communicates with the first through-hole, the shell comprises a guide duct along an axial direction of the shell, one end of the guide duct communicates with the airflow channel, and another end of the guide duct is connected to a gas source, and the laser assembly further comprises a nozzle, the nozzle comprises an axial hole, the nozzle is connected to a side of the mounting plate away from the laser generator and the axial hole corresponds to and communicates with the first through-hole, such that the laser is allowed to exit and an auxiliary laser processing gas is allowed to be sprayed through the airflow channel and the first through-hole.
17 . The laser assembly of claim 16 , wherein the laser generator and the mounting plate are provided with heat dissipation fins, the heat dissipation fins define heat dissipation channels, the heat dissipation channels are parallel to a direction of the laser emission of the laser generator, and an air intake is defined on the top plate, a ventilation gap is defined on the circuit board, the air intake communicates with the heat dissipation channels through the ventilation gap, and the cooling fan generates a cooling airflow that enters from the air intake and passes through the ventilation gap and the heat dissipation channels.
18 . The laser assembly of claim 16 , wherein a portion of the shell corresponding to an exit of the laser is set as a protective observation window for observing emission of the laser and reducing an impact of the laser on eyes of an observer, the circuit board comprises a power indicator light and a laser diode indicator light, the power indicator light indicates whether a normal power supply is available, the laser diode indicator light indicates whether a laser diode of the laser generator is emitting normally, a lens status indicator light is positioned on the circuit board, the lens status indicator light indicates corresponding level of dirtiness of the first lens determined by the circuit board based on temperature information, and the shell comprises an indicator light window, the indicator light window is made of a light-transmitting material and corresponds to the power indicator light, the laser diode indicator light, and the lens status indicator light.
19 . The laser assembly of claim 18 , wherein a breach is defined on one side wall of the shell for exhausting gas generated during laser processing in a space surrounded by the shell and the mounting plate where the nozzle is located.
20 . (canceled)

Description

FIELD The present application relates to the technical field of laser processing, particularly, relates to a detection assembly, a laser assembly, a laser emission control method of the laser assembly, and a laser processing equipment. BACKGROUND In laser processing, lens defects such as surface wear, internal gas pores, or external impurities such as smoke or dust may affect normal laser emission in the laser beam path. This in turn affects the laser processing effect or causes the lens to receive too much laser energy due to the defects or impurities, eventually leading to problem of overheating of the lens or even the laser equipment. For example, when a laser engraving machine is configured to process materials such as wood and paper, smoke and dust may be generated. When these impurities adhere to the surface of the lens in the machine, these impurities can cause damage to the laser emission, affecting the printing and cutting effect, and may also cause the lens to overheat and crack, rendering the laser assembly unable to function properly. SUMMARY The present application discloses a detection assembly, a laser assembly, and a laser processing equipment, to solve problem of lens defects or impurities affecting normal laser emission during laser processing or causing excessive absorption of laser energy by the lens. In one embodiment, a detection assembly is disclosed. The detection assembly is capable of detecting a temperature of a to-be-inspected lens of a laser assembly. The laser assembly includes a laser generator, and the detection assembly includes a first circuit board. The first circuit board includes a substrate and a temperature sensor. The substrate is provided with a first via allowing laser emitted by the laser generator to pass. The temperature sensor is positioned on a side surface of the substrate and is in an area outside the first via. The temperature sensor is directly thermally or indirectly thermally coupled to the to-be-inspected lens located in a laser path of the laser generator. In an embodiment, the detection assembly includes a plurality of temperature sensors, including the temperature sensor, the plurality of temperature sensors is distributed in a circumferential direction of the first via at intervals. In an embodiment, the detection assembly further includes a thermal conductive structure, the thermal conductive structure is annular and includes a second via, the second via corresponds to the first via, one side of the thermal conductive structure is thermally coupled to the temperature sensor and another side of the thermal conductive structure is thermally coupled to the to-be-inspected lens. Alternatively, the thermal conductive structure may be a thermal conductive silicone film. In an embodiment, the detection assembly further includes a connection member, the first circuit board is connected to the laser generator through the connection member. Alternatively, the connection member can be a connecting screw that securely connects the first circuit board to the laser generator. In an embodiment, the detection assembly further includes a mounting plate, the mounting plate is coupled with the laser generator and presses the to-be-inspected lens against the temperature sensor. In an embodiment, the mounting plate includes a first surface and a second surface opposite to each other, the first surface is coupled with the laser generator, and the first surface is concaved to form a relief groove for receiving the substrate. In an embodiment, the mounting plate further includes a first through-hole, the first through-hole is concaved from a bottom surface of the relief groove and extends through to the second surface, the first through-hole corresponds to the first via and allows the laser to pass through. A part of the first through-hole near the first circuit board is expanded to form a first reaming hole, the first reaming hole receives the to-be-inspected lens. In an embodiment, the detection assembly includes an annular elastic gasket, the annular elastic gasket is placed in the first reaming hole, one side of the annular elastic gasket presses against a bottom surface of the first reaming hole, another side of the annular elastic gasket elastically presses the to-be-inspected lens against the first circuit board. In an embodiment, the mounting plate includes an airflow channel. The mounting plate includes an air opening that is concaved from the bottom surface of the relief groove and connected to the airflow channel, the air opening is spaced from the first through-hole. The first circuit board includes an air pressure sensor, the air pressure sensor is positioned on the substrate; the substrate covers the air opening, and the air pressure sensor is located within the air opening to detect a pressure inside the airflow channel. In an embodiment, the airflow channel is provided with an airflow inlet and an airflow outlet, the airflow inlet extends to the first surfa