CN108827153B - Laser positioning device for spray gun and calibration method thereof - Google Patents

Abstract

The invention provides a laser positioning device for a spray gun and a calibration method thereof, and relates to the technical field of material surface engineering. The laser positioning device for spray gun includes a laser seat and a point laser, the laser seat includes a main body and a clamping part, and one end of the clamping part is fixedly connected with one end of the main body. One end of the point laser is connected to the end of the main body away from the clamping part, and the end of the point laser away from the main body is provided with a laser emission port. coincide. By keeping the laser seat and the inner wall of the anode nozzle of the spray gun concentric, the point-like laser projection can accurately locate the spraying position of the spray gun through its calibration method, and accurately show the movement trajectory of the spray gun corresponding to the spraying position on the workpiece. Fine-position spraying for shapes and small-sized workpieces.

Description

A laser positioning device for spray gun and its calibration method

technical field

The invention relates to the technical field of material surface engineering, in particular to a laser positioning device for a spray gun and a calibration method thereof.

Background technique

Thermal spraying technology is one of the key technologies of modern material surface engineering. Thermal spraying technology is a method of sending coating materials (powder or wire) into a certain heat source (arc, combustion flame, plasma, etc.) A process in which a high-speed air stream is sprayed onto the surface of the base material to form a coating. With the development of science and technology, the spraying method has been developed from the original hand-held spray gun to the automatic control spraying method of the mechanical hand-held gun, which has greatly improved the coating quality, production stability and efficiency. In the automatic control spraying mode of the mechanical hand-held gun, it is necessary to set the spraying program in advance before the actual spraying, and plan the trajectory of the jet center ejected from the anode nozzle of the spray gun on the workpiece, that is, to set the axis extension line of the anode nozzle of the spray gun The movement track on the workpiece, which requires the determination of the corresponding drop point of the axis extension line of the anode nozzle of the spray gun on the workpiece (equivalent to the corresponding spraying position of the spray gun).

At present, the corresponding landing point of the axial extension line of the anode nozzle of the spray gun on the workpiece is generally judged and positioned with the naked eye. However, there are many subjective factors and time-consuming judging by the naked eye. There is often a large error between the spraying position of the positioned spray gun and the coating deposition position during actual spraying, which brings many adverse effects. In actual production, when spraying larger flat samples and rotating bodies, the position of the spray gun can be located barely with the naked eye. In more cases, when the shape of the sprayed workpiece is complex, the transition area is small or narrow, the size of the workpiece is small, and the thermal spraying spray distance is large, etc., the problems caused by the positioning of the spray gun with the naked eye will become prominent, which greatly reduces the size of the workpiece. To a certain extent, it affects the implementation of the spraying process and the quality of the coated products.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a laser positioning device for spray gun, which has simple structure, convenient disassembly and assembly, can accurately locate the spraying position of spray gun, realize precise spraying, and expand the application range of spray gun.

Another object of the present invention is to provide a calibration method for the above-mentioned laser positioning device, which is simple to operate, can accurately locate the spraying position of the spray gun, realize precise spraying, and expand the application range of the spray gun.

The present invention solves its technical problems by adopting the following technical solutions.

The present invention proposes a laser positioning device for a spray gun, comprising:

A laser seat, the laser seat includes a main body and a clamping part, one end of the clamping part is fixedly connected with one end of the main body, and the axis of the clamping part coincides with the axis of the main body;

Point laser, one end of the point laser is connected to the end of the body away from the clamping part, and the axis of the point laser coincides with the axis of the body;

The end of the point laser away from the body is provided with a laser emission port, and the axis of the laser emission port coincides with the axis of the point laser.

Preferably, one end of the body close to the point laser is provided with a groove matching with the point laser, and the point laser is fixed in the groove.

Preferably, the laser positioning device for spray gun further comprises at least one alignment piece, one end of the alignment piece passes through the body and contacts with the point laser in the groove, and the alignment piece is optionally moved toward or away from the point laser.

Preferably, the laser positioning device for a spray gun includes a first calibration part and a second calibration part, and the axes of the first calibration part and the second calibration part are both perpendicular to the axis of the point laser.

Preferably, the axes of the first calibration piece and the second calibration piece are perpendicular to each other.

Preferably, the laser positioning device for a spray gun further includes at least one sealing ring, and the sealing ring is sleeved on the clamping portion.

The present invention proposes a calibration method for the above-mentioned laser positioning device for a spray gun, including:

A projection plane is set at a preset distance from the laser emission port, the laser beam of the point laser is perpendicular to the projection plane, and the laser positioning device for the spray gun is rotated, and the projection point of the laser beam on the projection plane forms a trajectory circle , and the diameter of the trajectory circle is smaller than the preset value to complete the calibration.

The beneficial effects of the present invention are:

The laser positioning device for a spray gun provided by the present invention includes a laser seat and a point laser, the laser seat includes a main body and a clamping part, one end of the clamping part is fixedly connected with one end of the main body, and the axis of the clamping part coincides with the axis of the main body . One end of the point laser is connected to the end of the main body away from the clamping part, and the axis of the point laser coincides with the axis of the main body. The end of the point laser away from the body is provided with a laser emission port, and the axis of the laser emission port coincides with the axis of the point laser. By keeping the laser seat and the inner wall of the anode nozzle of the spray gun concentric, the point-like laser projection can accurately locate the spraying position of the spray gun through its calibration method, and accurately show the movement trajectory of the spray gun corresponding to the spraying position on the workpiece. Fine-position spraying for shapes and small-sized workpieces.

The structure is simple, the positioning can be carried out by directly inserting and pulling out, and the disassembly and assembly are convenient. The calibration method is simple to operate and easy to judge, and the laser positioning device has high precision after being calibrated by the method. It can reduce the time and labor costs caused by visual positioning, as well as the waste of raw materials and energy caused by redundant spray paths. It avoids the problem of conflict between the positioning device of the external card and the position of the powder feeding assembly, and is versatile in thermal spray guns of different structures and shapes.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a laser positioning device for a spray gun and a spray gun according to an embodiment of the present invention;

2 is a schematic diagram of a calibration method of a laser positioning device for a spray gun provided by an embodiment of the present invention;

3 is a schematic structural diagram of the laser positioning device for a spray gun being used on a plasma spray gun provided in Embodiment 1 of the present invention;

Fig. 4 is the structural representation that the laser positioning device for spray gun provided in the embodiment of the present invention 2 is used on the supersonic flame spray gun;

5 is a schematic structural diagram of the laser positioning device for a spray gun used in an atmospheric plasma spray gun according to Embodiment 3 of the present invention.

Icon: 100-laser positioning device for spray gun; 110-laser seat; 111-body; 113-clamping part; 115-groove; 117-through hole; 119-sealing ring; 120-point laser; 121-laser emission 130-calibration piece; 131-first calibration piece; 133-second calibration piece; 200-nozzle; 300-O3CP type high-power single-cathode plasma spray gun; 400-K2 type supersonic flame spray gun of German GTV company; 500 -The F6 atmospheric plasma spray gun of the German GTV company.

Detailed ways

In order to make the purposes, 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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. If the specific conditions are not indicated in the examples, it is carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used without the manufacturer's indication are conventional products that can be purchased from the market.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or position shown in the drawings The relationship, or the orientation or position relationship that the product of the invention is usually placed in use, is 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 or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement" and "connection" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or Connected integrally; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or an internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present invention, all the embodiments, implementations and features of the present invention can be combined with each other without contradicting or conflicting. In the present invention, conventional equipment, devices, components, etc., can be either commercially available, or can be self-made according to the contents disclosed in the present invention. In the present invention, in order to highlight the key points of the present invention, some conventional operations, equipment, devices and components are omitted, or only briefly described.

Referring to FIG. 1 and FIG. 2 , a laser positioning device 100 for a spray gun provided by an embodiment of the present invention includes a laser seat 110 , a point laser 120 and at least one calibration member 130 . One end of the laser base 110 is detachably connected to the spray gun, and the other end is connected to the point laser 120 .

The laser base 110 includes a main body 111 and a clamping part 113 , one end of the clamping part 113 is fixedly connected with one end of the main body 111 , and the axis of the clamping part 113 coincides with the axis of the main body 111 . In this embodiment, both the body 111 and the clamping portion 113 are cylindrical structures. In other embodiments of the present invention, the body 111 and the engaging portion 113 may be prisms, which are not limited in the present invention. One end of the body 111 close to the point laser 120 is provided with a groove 115 matched with the point laser 120 , and one end of the point laser 120 is fixed in the groove 115 . The axis of the point laser 120 coincides with the axis of the body 111 . In this embodiment, the point laser 120 is cylindrical, the groove 115 is cylindrical, and the axis of the groove 115 coincides with the axis of the point laser 120 and the body 111 . The depth of the groove 115 is smaller than the length of the point laser 120 , that is, a part of the point laser 120 extends out of the groove 115 and is disposed outside the body 111 . In other embodiments of the present invention, the shapes of the point laser 120 and the groove 115 may be adjusted as required, which is not limited in the present invention.

One end of the point laser 120 away from the main body 111 is provided with a laser emission port 121 , and laser light is emitted from the laser emission port 121 . In order to ensure that the emitted laser beam is coincident with the axis of the clamping portion 113 , the axis of the laser emitting port 121 is coincident with the axis of the point laser 120 . In this embodiment, the point laser 120 is a general device in the technical field, which is not limited in the present invention.

In practical applications, deviations of the emitted laser beams may occur. In order to reduce the deviations, the laser positioning device 100 for spray guns uses a calibration part 130 to calibrate the laser beams. One end of the calibration piece 130 passes through the body 111 and contacts with the point laser 120 in the groove 115 .

Specifically, the sidewall of the groove 115 is provided with a through hole 117 , and the alignment member 130 passes through the through hole 117 to abut against the point laser 120 . As an implementation manner, the alignment member 130 is a laser alignment screw, and the inner wall of the through hole 117 is provided with an internal thread matching the laser alignment screw. The fine adjustment of the point laser 120 is realized by screwing the laser alignment screw. In order to improve the accuracy of calibration, in the embodiment of the present invention, the laser positioning device 100 for a spray gun includes a first calibration part 131 and a second calibration part 133, and the axes of the first calibration part 131 and the second calibration part 133 are both perpendicular to The axis of the point laser 120 . The axes of the first calibration member 131 and the second calibration member 133 are perpendicular to each other, that is, the angle between the first calibration member 131 and the second calibration member 133 is 90 degrees, which can realize alignment from both the horizontal and vertical directions. The position of the point laser 120 is adjusted to complete the calibration of the device.

The laser positioning device 100 for spray gun further includes at least one sealing ring 119 , and the sealing ring 119 is sleeved on the clamping portion 113 . In use, the clamping portion 113 of the laser base 110 is directly clamped into the anode nozzle 200 of the spray gun, and fixed by the sealing ring 119 . The point laser 120, the laser base 110 and the spray gun anode nozzle 200 remain concentric. After use, the laser seat 110 can be separated from the spray gun. The device has the advantages of simple structure, convenient use, convenient disassembly and assembly, and accurate positioning.

The present invention also provides a calibration method for the laser positioning device 100 for a spray gun, including:

Install the laser positioning device 100 for the spray gun into the nozzle of the spray gun;

Set a projection plane at a preset distance from the laser emission port. The laser beam of the point laser is perpendicular to the projection plane. Turn the spray gun laser positioning device set on the spray gun once, and the projection point of the laser beam on the projection plane forms a Track circle, the diameter of the track circle is smaller than the preset value to complete the calibration. Otherwise, adjust the calibration piece to make the track circle meet the requirements. Preferably, the preset distance is 5-10m, and the preset value is 25-35mm.

The features and performances of the present invention will be further described in detail below in conjunction with the embodiments.

Example 1

Referring to FIG. 3 , in this embodiment, a laser positioning device 100 for a spray gun is used to position an O3CP type high-power single-cathode plasma spray gun 300 of Oerlikon-Metco, Switzerland.

The point laser 120 is directly installed in the laser seat 110, the laser seat 110 is directly inserted into the anode nozzle 200 of the spray gun, the inner diameter of the anode nozzle 200 of the O3CP type thermal spray gun is 12.5mm, and the outer diameter of the straight insertion section of the laser seat 110 is 12mm, It is fixed by the sealing ring 119 .

The calibration method is to select the wall at a distance of 10m from the laser emission port 121 of the positioning device as the projection plane E, and keep the laser beam perpendicular to the wall. Manually rotate the laser seat 110 once, the projection point O of the laser beam forms a trajectory circle F on the projection plane E, and its diameter G is about 26mm, which is less than the calibration requirement of 30mm.

The calibrated spray gun is positioned with the laser positioning device 100. Since the spray distance is 1000 mm in actual spraying, the positioning accuracy of this embodiment is within 1.3 mm, and the precise positioning of the spraying position of the spray gun is realized.

Example 2

Referring to FIG. 4 , in this embodiment, a laser positioning device 100 for a spray gun is used to position a K2 type supersonic flame spray gun 400 of a German GTV company.

The point laser 120 is directly installed in the laser seat 110, the laser seat 110 is directly inserted into the anode nozzle 200 of the spray gun, the inner diameter of the anode nozzle 200 of the K2 type supersonic flame spray gun is 15mm, and the outer diameter of the straight insertion section of the laser seat 110 is 14.5mm. It is fixed by the sealing ring 119 .

The calibration method is to select the outer wall of the dust-removing square white iron pipe at a distance of 5m from the laser emission port 121 as the projection plane E, and keep the laser beam perpendicular to the outer wall of the pipe. Manually rotate the laser base 110 once, the projection point O of the laser beam forms a trajectory circle F on the projection plane E, and its diameter G is about 12mm, which is less than the calibration requirement of 30mm.

The calibrated spray gun is positioned with the laser positioning device 100. Since the spray distance is 380 mm in actual spraying, the positioning accuracy of this embodiment is within 0.5 mm, and the precise positioning of the spraying position of the spray gun is realized.

Example 3

Referring to FIG. 5 , in this embodiment, a laser positioning device 100 for a spray gun is used to position the F6-type atmospheric plasma spray gun 500 of the German GTV company.

The point laser 120 is directly installed in the laser seat 110, the laser seat 110 is directly inserted into the anode nozzle 200 of the spray gun, the inner diameter of the anode nozzle 200 of the F6 type atmospheric plasma spray gun is 7 mm, and the outer diameter of the straight insertion section of the laser seat 110 is 6.5 mm. The sealing ring 119 is fixed.

The calibration method is to select the wall at a distance of 5m from the laser emission port 121 of the positioning device as the projection plane E, and keep the laser beam perpendicular to the wall. Manually rotate the laser base 110 once, the projection point O of the laser beam forms a trajectory circle F on the projection plane E, and its diameter G is about 17mm, which is less than the calibration requirement of 30mm.

The calibrated spray gun is positioned with the laser positioning device 100. Since the spray distance is 120 mm in actual spraying, the positioning accuracy of this embodiment is within 0.2 mm, and the precise positioning of the spraying position of the spray gun is realized.

The above-described embodiments are some, but not all, embodiments of the present invention. The detailed descriptions of the embodiments of the invention are not intended to limit the scope of the invention as claimed, but are merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims (1)

1. A calibration method of a laser positioning device for a spray gun is characterized in that the laser positioning device for the spray gun comprises the following steps:

the laser positioning device for the spray gun comprises a laser seat, a positioning mechanism and a positioning mechanism, wherein the laser seat comprises a body and a clamping part, one end of the clamping part is fixedly connected with one end of the body, the axis of the clamping part is superposed with the axis of the body, and the positioning mechanism for the spray gun further comprises at least one sealing ring which is sleeved on the clamping part;

one end of the point laser is connected with one end of the body, which is far away from the clamping part, and the axis of the point laser is superposed with the axis of the body; the laser positioning device for the spray gun comprises a first calibration piece and a second calibration piece, one end of the first calibration piece and one end of the second calibration piece respectively penetrate through the body and are in contact with the spot laser in the groove, the calibration pieces can move towards or away from the spot laser optionally, the axes of the first calibration piece and the second calibration piece are perpendicular to the axis of the spot laser, and the axes of the first calibration piece and the second calibration piece are perpendicular to each other,

one end of the point laser device, which is far away from the body, is provided with a laser emission port, and the axis of the laser emission port is superposed with the axis of the point laser device;

the calibration method comprises the following steps: setting a projection plane at a position which is a preset distance away from the laser emitting port, wherein a laser beam of the point laser is perpendicular to the projection plane, rotating a laser positioning device for the spray gun, which is arranged on the spray gun, and forming a track circle at a projection point of the laser beam on the projection plane, wherein the calibration is completed when the diameter of the track circle is smaller than a preset value; the preset distance is 5-10 m, and the preset value is 25-35 mm;

when the diameter of the track circle is not smaller than the preset value, the calibration piece is adjusted to enable the diameter of the track circle formed by the projection point of the laser beam on the projection plane to be smaller than the preset value.

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