Electronic anti-collision device of laser head for laser additive manufacturing

Abstract

According to the electronic anti-collision device of the laser head for laser additive manufacturing, a first alignment column and a second alignment column are oppositely arranged and connected in a positioning mode, one end of a first butt joint is installed to a fixed position through a first torque motor, a laser head is installed on a second butt joint through a second torque motor, and a micro-touch switch is arranged on the first alignment column; a release groove is formed in the second alignment column, the execution end of the micro-touch switch is located in the release groove, the micro-touch switch is connected to the anti-collision controller, and the anti-collision controller is connected to the power supply device. According to the electronic anti-collision device of the laser head for laser additive manufacturing, when the first alignment column and the second alignment column move relatively, the micro-touch switch is touched, the micro-touch switch senses a displacement signal and transmits the displacement signal to the anti-collision controller, the anti-collision controller judges that the laser head is collided, the laser welding head is powered off, and the laser welding head is powered off. Therefore, other parts or workers are prevented from being damaged, and the safety performance of the device is improved.

Description

Technical Field

[0001] The invention belongs to the field of laser head anti-collision, and in particular relates to an electronic anti-collision device for a laser head used in laser additive manufacturing. Background Art

[0002] Additive manufacturing technology refers to a scientific and technological system that directly manufactures parts based on the discrete-accumulation principle and driven by the three-dimensional data of parts. Based on different classification principles and understanding methods, additive manufacturing technology also has many names such as rapid prototyping, rapid prototyping, rapid manufacturing, 3D printing, etc. Its connotation is still deepening and its extension is constantly expanding. The "additive manufacturing" mentioned here has the same meaning as "rapid prototyping" and "rapid manufacturing".

[0003] In the prior art, laser additive manufacturing is divided into two categories, namely directed energy deposition and powder cladding, according to the different states of the material during deposition. Laser powder cladding technology PBF, also known as laser selective melting molding technology, first uses mapping software to design the part model, then slices and layers the model according to the printing process, imports the two-dimensional contour data of each section into the printing device, and sets a specific scanning route. During laser printing, the metal powder is melted layer by layer according to the set scanning route, and is evenly spread on the working plane substrate through a powder feeding device.

[0004] In practical applications, the optical devices of the laser head require higher installation precision, while the production conditions are relatively complex. Collisions often occur between the product and the laser head, and between the signal line and the laser head. This requires protection against collisions of the laser head. The laser head anti-collision device of the prior art is connected by a floating head joint. When the laser head collides, the output signal of the laser head cannot be synchronously controlled, which can easily cause damage to parts and personnel. Summary of the invention

[0005] In view of this, the present invention aims to propose an electronic anti-collision device for a laser head used in laser additive manufacturing, so as to solve the problem that most laser anti-collision devices in the prior art are floating joints and cannot perform associated control on the laser head.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] An electronic anti-collision device for a laser head used for laser additive manufacturing comprises a first pair of joints and a second pair of joints, wherein the first pair of joints and the second pair of joints are respectively provided with a plurality of docking holes, the docking holes of the first pair of joints are used to set a first magnetic column and a first alignment column, the docking holes of the second pair of joints are used to set a second magnetic column and a second alignment column, the first magnetic column and the second magnetic column are arranged opposite to each other and are magnetically attracted to each other, the first alignment column and the second alignment column are arranged opposite to each other and are positioned and connected, one end of the first pair of joints is installed to a fixed position through a first torque motor, the second pair of joints is installed with a laser head through a second torque motor, a micro-touch switch is arranged on the first alignment column, a release groove is arranged on the second alignment column, the execution end of the micro-touch switch is located in the release groove, the micro-touch switch is connected to an anti-collision controller, and the anti-collision controller is connected to a power supply device.

[0008] Furthermore, the first alignment column includes a mounting seat, the periphery of which is fixedly mounted in the mounting hole of the first pair of joints, a ball head is arranged at one end of the mounting seat, an end cover is arranged at the other end of the mounting seat, and the end cover is elastically connected to the periphery of the ball head through a first spring.

[0009] Furthermore, the second alignment column includes an abutment seat, and the abutment seat is a cylindrical structure, one end of the abutment seat is provided with a ball socket, the other end of the abutment seat abuts on the cover, and the cover is connected to the second docking head, and the outer periphery of the ball head is slidably connected to the ball socket.

[0010] Furthermore, the second butt joint is threadedly connected to a first adjusting bolt, one end of the first adjusting bolt is rotatably sleeved on a first wedge block, the periphery of the first wedge block is slidably connected to the second butt joint, and the slope of the first wedge block abuts against the periphery of the abutment seat.

[0011] Furthermore, the second butt joint is threadedly connected to a second adjusting bolt, one end of the second adjusting bolt is rotatably sleeved on a second wedge block, the periphery of the second wedge block is slidably connected to the second butt joint, and the slope of the second wedge block abuts against the periphery of the abutment seat.

[0012] Furthermore, the first wedge-shaped block and the second wedge-shaped block are arranged perpendicular to each other.

[0013] Furthermore, a crimping plate is arranged between the first wedge block and the second wedge block, and one side of the crimping plate abuts against the abutment seat, and the other side of the crimping plate is elastically connected to the second pair of joints through a second spring.

[0014] Furthermore, a micro-touch switch is arranged on the ball head, and a release groove is arranged in the middle of the ball socket.

[0015] Compared with the prior art, the electronic anti-collision device of the laser head for laser additive manufacturing according to the present invention has the following beneficial effects:

[0016] (1) In the electronic anti-collision device of the laser head for laser additive manufacturing described in the present invention, when the first alignment column and the second alignment column move relative to each other, the micro-touch switch will be touched, and the micro-touch switch will sense the displacement signal and transmit it to the anti-collision controller. The anti-collision controller determines that a collision has occurred and cuts off the power to the laser welding head to prevent damage to other components or personnel, thereby improving the safety performance of the device.

[0017] (2) The electronic anti-collision device of the laser head for laser additive manufacturing described in the present invention, in which lenses are respectively arranged on the first pair of joints and the second joints, can reduce the volume of parts for installing the lenses while having an anti-collision function, reduce the volume and weight of the laser actuator, and reduce energy consumption. Moreover, through the magnetic connection between the first magnetic column and the second magnetic column and the positioning connection between the first alignment column and the second alignment column, the connection accuracy of the first pair of joints and the second pair of joints can be improved, so as to ensure the coaxiality of multiple lenses and improve the installation quality.

[0018] (3) The electronic anti-collision device of the laser head for laser additive manufacturing described in the present invention has an arc-shaped structure on the periphery of the ball head, which is adapted to the ball socket to ensure that the first pair of joints and the second pair of joints can be installed in place, and when the ball head and the ball socket move relative to each other, the ball head can compress the first spring so that the ball head does not interfere with the relative movement of the first pair of joints and the second pair of joints. In the working state, after the welding head collides, the displacement of the welding head is released through the relative movement of the first pair of joints and the second pair of joints to ensure that the welding head is not damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic structural diagram of an electronic anti-collision device of a laser head for laser additive manufacturing according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic structural diagram of a first pair of connectors according to an embodiment of the present invention;

[0022] Figure 3 is a cross-sectional schematic diagram of a first pair of connectors according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic structural diagram of a second pair of connectors according to an embodiment of the present invention;

[0024] Figure 5 It is a schematic structural diagram of the cooperation between the abutment seat and the first wedge block and the second wedge block according to an embodiment of the present invention;

[0025] Figure 6This is a schematic diagram of the structure of the second pair of joints and the second alignment posts with the cover removed according to an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1-first pair of joints; 2-second pair of joints; 21-first adjusting bolt; 22-second adjusting bolt; 23-first wedge block; 24-second wedge block; 25-crimping plate; 26-second spring; 3-first magnetic column; 4-second magnetic column; 5-lens; 6-first alignment column; 61-mounting seat; 62-ball head; 63-end cover; 64-first spring; 65-micro-touch switch; 7-second alignment column; 71-abutment seat; 72-ball socket; 73-release groove. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0032] like Figure 1-Figure 6As shown, an electronic anti-collision device for a laser head used for laser additive manufacturing comprises a first pair of joints 1 and a second pair of joints 2, and the first pair of joints 1 and the second pair of joints 2 are respectively provided with a plurality of docking holes, the docking holes of the first pair of joints 1 are used to set the first magnetic suction column 3 and the first alignment column 6, the docking holes of the second pair of joints 2 are used to set the second magnetic suction column 4 and the second alignment column 7, the first magnetic suction column 3 and the second magnetic suction column 4 are arranged opposite to each other and magnetically attracted to each other, the first alignment column 6 and the second alignment column 7 are arranged opposite to each other and are positioned and connected, through holes are respectively provided in the middle of the first pair of joints 1 and the second pair of joints 2, and the through holes are used to install the lens 5, the first magnetic suction column 3 and the second magnetic suction column 4 are arranged opposite to each other and are magnetically attracted to each other, the first alignment column 6 and the second alignment column 7 are arranged opposite to each other and are positioned and connected, through holes are respectively provided in the middle of the first pair of joints 1 and the second pair of joints 2, and the lenses 5 are installed in the through holes, and the first One end of a pair of joints 1 is installed to a fixed position through a first torque motor, and a second pair of joints 2 is installed with a laser head through a second torque motor. Lenses 5 are respectively arranged on the first pair of joints 1 and the second pair of joints 2. The volume of parts for installing the lenses 5 can be reduced while having an anti-collision function, the volume and weight of the laser actuator can be reduced, and the energy consumption can be reduced. Moreover, through the magnetic connection of the first magnetic column 3 and the second magnetic column 4, and the positioning connection of the first alignment column 6 and the second alignment column 7, the connection accuracy of the first pair of joints 1 and the second pair of joints 2 can be improved, so as to ensure the coaxiality of multiple lenses 5 and improve the installation quality.

[0033] like Figure 3 As shown, the cross-sections of the first magnetic pole 3 and the second magnetic pole 4 are both T-shaped structures, the materials of the first magnetic pole 3 and the second magnetic pole 4 are both neodymium magnets, the materials of the first pair of joints 1 and the second pair of joints 2 are both aluminum alloys, the first magnetic pole 3 and the second magnetic pole 4 are both bonded or connected to the docking hole by screws, and the T-shaped structure design facilitates the connection operation of the staff.

[0034] The first alignment column 6 includes a mounting seat 61, the periphery of the mounting seat 61 is fixedly mounted in the mounting hole of the first pair of joints 1, a ball head 62 is arranged at one end of the mounting seat 61, an end cover 63 is arranged at the other end of the mounting seat 61, and the end cover 63 is elastically connected to the periphery of the ball head 62 through a first spring 64, the second alignment column 7 includes an abutment seat 71, and the abutment seat 71 is a cylindrical structure, one end of the abutment seat 71 is provided with a ball socket 72, the other end of the abutment seat 71 is abutted to the cover, and the cover is connected to the second pair of joints 2, the periphery of the ball head 62 The ball head 62 is slidably connected to the ball socket 72, and the outer periphery of the ball head 62 is an arc-shaped structure. It is adapted to the ball socket 72 to ensure that the first pair of joints 1 and the second pair of joints 2 can be installed in place, and when the ball head 62 and the ball socket 72 move relative to each other, the ball head 62 can compress the first spring 64 so that the ball head 62 does not interfere with the relative movement of the first pair of joints 1 and the second pair of joints 2. In the working state, after the welding head collides, the displacement of the welding head is released through the relative movement of the first pair of joints 1 and the second pair of joints 2 to ensure that the welding head is not damaged.

[0035] The first adjusting bolt 21 is threadedly connected to the second pair of joints 2. One end of the first adjusting bolt 21 is rotatably sleeved on the first wedge block 23. The periphery of the first wedge block 23 is slidably connected to the second pair of joints 2. The slope of the first wedge block 23 abuts against the periphery of the abutment seat 71.

[0036] The second adjusting bolt 22 is threadedly connected to the second joint 2, one end of the second adjusting bolt 22 is rotatably sleeved with the second wedge block 24, the periphery of the second wedge block 24 is slidably connected to the second joint 2, the slope of the second wedge block 24 abuts against the periphery of the abutment seat 71, and the first wedge block 23 and the second wedge block 24 are arranged perpendicular to each other. Figure 6 As shown, the docking hole for installing the second alignment column 7 is a rectangular hole, or the docking hole is other polygonal structures, and the first adjusting bolt 21 and the second adjusting bolt 22 can respectively adjust the relative position of the abutment seat 71 in the docking hole, so as to adjust the relative position of the first pair of joints 1 and the second pair of joints 2. When there is an assembly tolerance or production tolerance between the first pair of joints 1 and the second pair of joints 2, the first pair of joints 1 and the second pair of joints 2 can be adjusted to be coaxial by adjusting the first adjusting bolt 21 and the second adjusting bolt 22, so that the lenses 5 installed in the two are coaxial, thereby improving the assembly accuracy.

[0037] A crimping plate 25 is arranged between the first wedge block 23 and the second wedge block 24, and one side of the crimping plate 25 abuts against the abutment seat 71, and the other side of the crimping plate 25 is elastically connected to the second docking joint 2 via a second spring 26. The abutment plate is arranged to ensure that the outer periphery of the abutment seat 71 always abuts against the first wedge block 23 and the second wedge block 24 to ensure the adjustment accuracy of the first adjusting bolt 21 and the second adjusting bolt 22.

[0038] A micro-touch switch 65 is arranged on the ball head 62, and a release groove 73 is arranged in the middle of the ball socket 72. The execution end of the micro-touch switch 65 is located in the release groove 73. When the ball head 62 and the ball socket 72 move relative to each other, the micro-touch switch 65 will be touched, thereby sensing a displacement signal, and the micro-touch switch 65 is connected to an anti-collision controller. The anti-collision controller is a PLC or a single-chip microcomputer in the prior art. The anti-collision controller in this embodiment is a single-chip microcomputer, and the anti-collision controller is connected to a power supply device. The micro-touch switch 65 senses the displacement signal and transmits it to the anti-collision controller. The anti-collision controller determines that a collision has occurred and cuts off the power to the laser welding head to prevent damage to other components or staff, thereby improving the safety performance of the device.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electronic anti-collision device for a laser head for laser additive manufacturing, characterized in that: The invention comprises a first pair of joints (1) and a second pair of joints (2), wherein the first pair of joints (1) and the second pair of joints (2) are respectively provided with a plurality of docking holes, the docking holes of the first pair of joints (1) are used to set a first magnetic suction column (3) and a first alignment column (6), and the docking holes of the second pair of joints (2) are used to set a second magnetic suction column (4) and a second alignment column (7), the first magnetic suction column (3) and the second magnetic suction column (4) are arranged opposite to each other and magnetically attracted to each other, the first alignment column (6) and the second alignment column (7) are arranged opposite to each other and are positioned and connected, one end of the first pair of joints (1) is installed to a fixed position through a first torque motor, the second pair of joints (2) is installed with a laser head through a second torque motor, a micro-touch switch (65) is arranged on the first alignment column (6), a release groove (73) is arranged on the second alignment column (7), an execution end of the micro-touch switch (65) is located in the release groove (73), the micro-touch switch (65) is connected to an anti-collision controller, and the anti-collision controller is connected to a power supply device.

2. The electronic anti-collision device for a laser head for laser additive manufacturing according to claim 1, characterized in that: The first alignment column (6) comprises a mounting seat (61), the periphery of the mounting seat (61) is fixedly mounted in the mounting hole of the first pair of joints (1), a ball head (62) is arranged at one end of the mounting seat (61), an end cover (63) is arranged at the other end of the mounting seat (61), and the end cover (63) is elastically connected to the periphery of the ball head (62) via a first spring (64).

3. The electronic anti-collision device for a laser head for laser additive manufacturing according to claim 2, characterized in that: The second alignment post (7) comprises an abutment seat (71), and the abutment seat (71) is a cylindrical structure. One end of the abutment seat (71) is provided with a ball socket (72), and the other end of the abutment seat (71) abuts against a cover, and the cover is connected to the second alignment joint (2), and the outer periphery of the ball head (62) is slidably connected to the ball socket (72).

4. The electronic anti-collision device for a laser head for laser additive manufacturing according to claim 3, characterized in that: The second pair of joints (2) is threadedly connected to the first adjusting bolt (21), one end of the first adjusting bolt (21) is rotatably sleeved on the first wedge block (23), the periphery of the first wedge block (23) is slidably connected to the second pair of joints (2), and the slope of the first wedge block (23) abuts against the periphery of the abutting seat (71).

5. The electronic anti-collision device for a laser head for laser additive manufacturing according to claim 4, characterized in that: The second pair of joints (2) is threadedly connected to a second adjusting bolt (22), one end of the second adjusting bolt (22) is rotatably sleeved on a second wedge block (24), the periphery of the second wedge block (24) is slidably connected to the second pair of joints (2), and the slope of the second wedge block (24) abuts against the periphery of the abutting seat (71).

6. The electronic anti-collision device for a laser head for laser additive manufacturing according to claim 5, characterized in that: The first wedge block (23) and the second wedge block (24) are arranged perpendicular to each other.

7. The electronic anti-collision device for a laser head for laser additive manufacturing according to claim 5, characterized in that: A crimping plate (25) is arranged between the first wedge block (23) and the second wedge block (24), and one side of the crimping plate (25) abuts against the abutment seat (71), and the other side of the crimping plate (25) is elastically connected to the second butt joint (2) via a second spring (26).

8. The electronic anti-collision device for a laser head for laser additive manufacturing according to claim 1, characterized in that: A micro-touch switch (65) is arranged on the ball head (62), and a release groove (73) is arranged in the middle of the ball socket (72).

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