CN217288967U

CN217288967U - Spray gun calibrating device

Info

Publication number: CN217288967U
Application number: CN202220725681.8U
Authority: CN
Inventors: 王刚
Original assignee: Tianjin Jingwei Hengrun Technology Co ltd
Current assignee: Tianjin Jingwei Hengrun Technology Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-08-26
Anticipated expiration: 2032-03-31

Abstract

The embodiment of the utility model provides a spray gun calibration device, which comprises a fixed seat, wherein a plurality of coupling parts which are evenly distributed at equal intervals are arranged on the periphery of one end surface of the fixed seat along a first direction in an extending way towards the direction far away from the fixed seat, a first positioning surface is arranged on the other end surface of the fixed seat along the first direction, one end surface of a laser transmitter far away from a laser emitting port is abutted against the first positioning surface, the central axis of the laser emitting port of the laser transmitter is superposed with the central axis of the fixed seat, an installation part is connected with one end of the fixed seat, which is provided with the first positioning surface, the laser transmitter is fixed on the fixed seat, one end of the installation part far away from the fixed seat is provided with an opening, which corresponds to the laser emitting port of the laser transmitter, when spray gun calibrating device was in operating condition, the outside surface of a plurality of coupling pieces butt and fixed spray gun makes the axis of the nozzle of spray gun and the axis coincidence of laser emitter's laser emission mouth. The device can move along with the spray gun, and accurately displays the moving track of the spray gun.

Description

Spray gun calibrating device

Technical Field

The utility model relates to a spraying equipment technical field particularly, relates to a spray gun calibrating device.

Background

The spray coating technology is a process for spraying a coating material onto the surface of a base material by a spray gun through high-speed air flow to form a coating, and is one of the key technologies of modern material surface engineering. With the development of science and technology, the spraying mode is developed from the original spraying mode of a handheld spray gun to the automatic control spraying mode of a manipulator-held gun, and the quality, production stability and efficiency of the coating are greatly improved. In an automatic control spraying mode with a manipulator holding a gun, a spraying program needs to be set in advance at the actual spraying cost, and a running track of a jet center sprayed by a spray gun on a workpiece is planned, namely a moving track of an axis extension line of the spray gun on the workpiece needs to be set, so that a corresponding drop point (equal to a spraying position corresponding to the spray gun) of the axis extension line of the spray gun on the workpiece needs to be judged. At present, the corresponding drop point of the axis extension line of the spray gun on a workpiece is mostly judged and positioned by naked eyes, but the subjective factors of the judgment by the naked eyes are more, the time consumption is long, the positioning result often has larger errors, and the implementation of the spraying process and the quality of a coating product are influenced to a great extent.

SUMMERY OF THE UTILITY MODEL

The present specification provides a spray gun calibration device to overcome at least one technical problem in the prior art.

According to an embodiment of the present description, there is provided a spray gun calibration device including:

the fixing seat is provided with a plurality of coupling pieces which are uniformly distributed at equal intervals in an extending way along the periphery of one end surface of the fixing seat in the first direction and in a direction far away from the fixing seat, the other end surface of the fixing seat in the first direction is provided with a first positioning surface,

the end surface of the laser transmitter, which is far away from the laser emitting opening, is abutted against the first positioning surface, the central axis of the laser emitting opening of the laser transmitter is superposed with the central axis of the fixing seat,

the mounting piece is connected with one end of the fixing seat, which is provided with the first positioning surface, and is used for fixing the laser emitter on the fixing seat, one end of the mounting piece, which is far away from the fixing seat, is provided with an opening, and the opening corresponds to a laser emitting opening of the laser emitter,

when the spray gun calibration device is in a working state, the coupling pieces are abutted against and fix the outer side surface of the spray gun, so that the central axis of the nozzle of the spray gun is superposed with the central axis of the laser emission port of the laser emitter.

Optionally, the fixing base sets up a plurality ofly set up the second locating surface on the terminal surface of coupling spare, work as when spray gun calibrating device is in operating condition, the spray gun set up the one end of nozzle with the butt of second locating surface is right the spray gun carries out axial positioning.

Further optionally, the coupling piece includes connecting portion and fixed part, connecting portion follow the fixing base is followed the periphery of a terminal surface of first direction is to keeping away from the direction extension setting of fixing base, fixed part body coupling is in connecting portion is kept away from the one end of fixing base, the fixed part sets up the edge the third locating surface that first direction extends, works as when spray gun calibrating device is in operating condition, third locating surface butt the outside surface of spray gun is right the spray gun carries out radial positioning and fixes.

Still further optionally, the coupling member comprises a material having elasticity.

Still further optionally, one end of the fixing part, which is far away from the connecting part, is provided with a chamfer which is located on the third positioning surface and far away from the central axis of the fixing seat.

Still further optionally, in the first direction, a range of a distance between one side of the third positioning surface close to the fixing seat and the second positioning surface is 15-20 mm.

Optionally, the laser emitter includes a first portion, a second portion, and a third portion connecting the first portion and the second portion, the first portion is a conical surface, the second portion is a spherical end surface, the third portion is a cylindrical structure, a laser emission port of the laser emitter is disposed at one end of the first portion far away from the third portion,

a cavity for accommodating the laser emitter is arranged in the mounting piece, one end of the cavity close to the fixed seat is a cylinder and corresponds to the third part, one end of the cavity far away from the fixed seat is in a frustum shape and corresponds to the first part,

the first locating surface is a spherical end surface corresponding to the second portion,

the mounting piece is connected with one end, provided with the first positioning surface, of the fixing seat, the first part is accommodated at one end, far away from the fixing seat, of the cavity and axially limits the laser emitter, the third part is accommodated at one end, close to the fixing seat, of the cavity and radially limits the laser emitter, and the second part is abutted against the first positioning surface.

Optionally, the laser emitter is of a cylindrical structure, a cavity for accommodating the laser emitter is arranged inside the mounting part, the cavity is cylindrical and corresponds to the laser emitter in shape and size,

the mounting piece is connected with one end, provided with the first positioning surface, of the fixing seat, the laser emitter is contained in the cavity, and one end face, far away from the laser emitting opening, of the laser emitter is abutted against the first positioning surface.

Optionally, a receiving groove is formed in the other end face of the fixing seat along the first direction, the first positioning surface is formed in the end face of the receiving groove along the first direction, the laser emitter is received in the receiving groove to radially position the laser emitter, the mounting part is connected with one end, provided with the first positioning surface, of the fixing seat, one end face, far away from the laser emitting port, of the laser emitter is abutted against the first positioning surface, one end face, provided with the laser emitting port, of the laser emitter is abutted against the end face, close to the laser emitter, of the mounting part, and the laser emitter is axially positioned.

Further optionally, one end of the mounting part close to the fixing seat is in threaded connection with one end of the fixing seat provided with the first positioning surface.

The beneficial effects of the embodiment of the specification are as follows:

this spray gun calibrating device adopts special fastening structure to fix on the outer wall of spray gun and coaxial, and remove along with the spray gun, utilize the mode of ray projection to realize the visual of spraying route, can show the removal orbit of spray gun accurately, be favorable to drawing the spraying orbit picture, and it can realize inserting soon, pull out soon of spray gun under the condition of no instrument assistance, easily loading and unloading, high durability and convenient use, in addition, the device adopts the second locating surface and the third locating surface that have preset difference in height, can with the spray gun face of cylinder, the terminal surface closely laminates, the precision is high and the location is accurate.

Drawings

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

FIG. 1 is a schematic structural diagram of a first embodiment of a spray gun calibration device provided in the present specification;

FIG. 2 is a front view of a first embodiment of a spray gun calibration apparatus provided herein;

FIG. 3 is a schematic cross-sectional view of a first embodiment of a spray gun calibration apparatus provided herein;

FIG. 4 is a cross-sectional exploded schematic view of a first embodiment of a spray gun calibration apparatus provided herein;

FIG. 5 is a schematic structural view of a first embodiment mount of a spray gun calibration device provided herein;

FIG. 6 is a schematic cross-sectional view of a second embodiment of a spray gun calibration apparatus provided herein;

FIG. 7 is a cross-sectional, exploded, schematic view of a second embodiment of a spray gun calibration apparatus provided herein;

FIG. 8 is a schematic structural view of a second embodiment anchor block and coupling of a spray gun calibration device provided herein;

FIG. 9 is a schematic cross-sectional view of a third embodiment of a spray gun calibration apparatus provided herein;

FIG. 10 is a schematic cross-sectional exploded view of a third embodiment of a spray gun calibration apparatus provided herein;

FIG. 11 is a schematic structural view of a third embodiment mount of a spray gun calibration device provided herein.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present specification and the drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The embodiment of the specification discloses a spray gun calibrating device. The following detailed description is made with reference to the accompanying drawings.

As shown in fig. 1-11, the spray gun calibration device includes a fixing base 1, a laser emitter 3 and a mounting member 4 for fixing the laser emitter 3 on the fixing base 1, the fixing base 1 is used as a component for connecting the spray gun calibration device with the spray gun 5, and the laser emitter 3 is fixed on the fixing base 1 in a positioning manner, so that the central axis of the laser emitting port 31 of the laser emitter 3 coincides with the central axis of the nozzle 52 of the spray gun 5, that is, the spray gun calibration device is ensured to be coaxial with the spray gun 5, and the accurate spraying position is displayed in real time.

In the embodiment of the present disclosure, as shown in fig. 2 and 3, a plurality of coupling pieces 2 uniformly distributed at equal intervals are arranged on the periphery of one end surface 11 of the fixing base 1 in the first direction in an extending manner in a direction away from the fixing base 1, and the plurality of coupling pieces 2 are used to abut against an outer side surface 51 of the spray gun 5, so as to fix the spray gun 5, ensure that a central axis of the fixing base 1 coincides with a central axis of a nozzle 52 of the spray gun 5, and achieve quick mounting and dismounting between the spray gun and the spray gun calibration device while meeting the requirements of assembly positioning accuracy and repeated mounting and dismounting stability. Wherein, the first direction be parallel with the axis of fixing base 1.

In one embodiment, as shown in fig. 4, the coupling member 2 includes a connecting portion 21 and a fixing portion 22, the connecting portion 21 is a portion of the connection between the coupling member 2 and the fixing base 1, and is extended from the periphery of one end surface 11 of the fixing base 1 along the first direction to the direction far away from the fixing base 1, the fixing portion 22 is integrally connected to one end 211 of the connecting portion 21 far away from the fixing base 1, the fixing portion 22 is a portion of the coupling member 2 abutting against an outer side surface 51 of the fixed spray gun 5, and is provided with a third positioning surface 23 extended along the first direction, the thickness of the fixing portion 22 at the third positioning surface 23 is greater than that of the connecting portion 21, the circumferential diameter surrounded by the plurality of coupling members 2 is smaller than the outer circumferential diameter of the spray gun 5, when the spray gun calibration device is in the working state, the third positioning surface 23 abuts against the outer side surface 51 of the spray gun 5 to radially position and fix the spray gun 5, the fixed connection between the plurality of coupling members 2 and the spray gun 5 is in an interference fit, can ensure the stability and firmness of the fixation of the spray gun 5.

In an embodiment, the coupling member 2 comprises a resilient material, such as a spring steel, having a certain elasticity to ensure that the expanded coupling member can be inserted into the spray gun 5 and can coaxially position the spray gun 5. Further, as shown in fig. 1, six can be selected for use to the number of coupling piece 2, and on the one hand, this spray gun calibrating device has special six lamella elasticity open structure, and it combines fixing base 1 to constitute the bushing structure of connecting spray gun 5, and is more firm stable to the fixed of spray gun 5, can realize inserting soon, pull out soon under the circumstances of no instrument assistance, and on the other hand sets up six coupling piece 2 on fixing base 1, when guaranteeing the fastness that spray gun 5 is fixed, changes in processing more easily.

In an embodiment, as shown in fig. 3 and 4, a chamfer 24 located on the third positioning surface 23 and away from the central axis of the fixing seat 1 is disposed at one end 221 of the fixing portion 22, which is away from the connecting portion 21, the chamfer 24 is a guiding chamfer, so that the coupling members 2 are smoothly sleeved on the outer wall of the spray gun 5, the third positioning surface 23 abuts against the outer side surface 51 of the spray gun 5, and the spray gun 5 is fixed, thereby effectively avoiding damage to the spray gun 5.

In addition, fixing base 1 sets up second locating surface 15 on the terminal surface 11 of a plurality of couplants 2, when spray gun calibrating device is in operating condition, spray gun 5 sets up the one end 53 and the 15 butt of second locating surface of nozzle 52, thereby carry out axial positioning to spray gun 5, adopt two locating surfaces of second locating surface 15 and third locating surface 23, can make this spray gun calibrating device and the spray gun 5 face of cylinder (being spray gun 5's outside surface 51), the terminal surface (being spray gun 5 sets up the terminal surface at the one end 53 place of nozzle 52) closely laminate, fixed fastness and stability are strong, the precision is high, and the location is accurate. Further, as shown in fig. 4, in the first direction, a range of a distance a between one side 231 of the third positioning surface 23 close to the fixing base 1 and the second positioning surface 15 is 15-20 mm, that is, a height difference of 15-20 mm exists between the third positioning surface 23 and the second positioning surface 15, so as to further improve the firmness and stability of the fixing of the spray gun 5 on the spray gun calibration device.

The laser emitter 3 is an integral part of the spray gun calibration device and is used for displaying the spraying position of the spray gun 5 in real time, for example, the laser emitter 3 may be an infrared emitter which emits infrared rays to the sprayed member so as to represent the spraying position of the spray gun 5. In one embodiment, as shown in fig. 4, a first positioning surface 13 is disposed on the other end surface 12 of the fixing base 1 along the first direction, one end surface 32 of the laser emitter 3 away from the laser emitting port 31 abuts against the first positioning surface 13, so as to preliminarily position the laser emitter 3, and is connected with one end 14 of the fixed seat 1, which is provided with the first positioning surface 13, through the mounting part 4, so as to fix the laser emitter 3 on the fixed seat 1, the laser emitter 3 is further precisely positioned and fixed, so that the axle wire of the laser emitting port 31 of the laser emitter 3 is superposed with the axle wire of the fixed seat 1, meanwhile, one end 41 of the mounting part 4 far away from the fixed seat 1 is provided with an opening 42, the opening 42 corresponds to the laser emitting opening 31 of the laser emitter 3, so that the radiation emitted from the laser emitting port 31 of the laser emitter 3 can be emitted to the member to be sprayed through the opening 42, representing the spraying position of the spray gun 5.

When the spray gun calibrating device is in a working state, the outer side surfaces 51 of the spray guns 5 are abutted and fixed by the coupling pieces 2, so that the spray guns 5 are fixed on the spray gun calibrating device, the central axes of the nozzles 52 of the spray guns 5 are overlapped with the central axes of the laser emitting ports 31 of the laser emitters 3, the fact that the rays emitted by the laser emitting ports 31 of the laser emitters 3 are emitted to the sprayed parts can represent the spraying positions of the spray guns 5 is guaranteed, the relative positions and the relative motions of the spray guns 5 and the sprayed parts are accurately marked, and the visualization of the relative positions and the relative motions of the spray guns 5 and the sprayed parts is achieved.

As shown in fig. 3 to 5, the laser emitter 3 in the spray gun calibration device according to the first embodiment of the present disclosure includes a first portion 33, a second portion 34, and a third portion 35, where the third portion 35 is connected between the first portion 33 and the second portion 34, as shown in fig. 4, the first portion 33 is a conical surface, the second portion 34 is a spherical end surface, the third portion 35 is a cylindrical structure, and the laser emitting port 31 of the laser emitter 3 is disposed at an end 331 of the first portion 33 away from the third portion 35.

Correspondingly, the mounting part 4 is provided with a cavity 43 for accommodating the laser emitter 3 therein, an end 431 of the cavity 43 close to the fixing base 1 is a cylinder corresponding to the third portion 35, an end 432 of the cavity 43 far from the fixing base 1 is a frustum shape corresponding to the first portion 33, and the first positioning surface 13 is a spherical end surface corresponding to the second portion 34.

When the mounting member 4 is connected to the end 14 of the fixing base 1, which is provided with the first positioning surface 13, the first portion 33 is received in the cavity 43 at an end 432 thereof away from the fixing base 1, axially limit the laser emitter 3, the third part 35 is accommodated in one end 431 of the cavity 43 close to the permanent seat 1, the laser emitter 3 is limited in the radial direction, so that the laser emitter 3 is fixed in the cavity 43, the second part 34 is abutted against the first locating surface 13, the laser emitter 3 is fixed by the mounting part 4 and is coaxial with the central axis of the fixed seat 1, because the central axis of the fixed seat 1 is superposed with the central axis of the laser emitting port 31 of the laser emitter 3, and when the spray gun 5 is fixed on the fixed seat 1, the central axis of the spray nozzle 52 of the spray gun 5 is superposed with the central axis of the fixed seat 1, further, the center axis of the nozzle 52 of the spray gun 5 can be made to coincide with the center axis of the laser emitting port 31 of the laser emitter 3.

Wherein, the one end 45 that installed part 4 is close to fixing base 1 sets up 14 threaded connection with the one end of fixing base 1 first locating surface 13. For example, as shown in fig. 4 and 5, an internal thread 141 is provided on the end 14 of the fixing base 1 where the first positioning surface 13 is provided, an external thread 451 is provided on the end 45 of the mounting element 4 close to the fixing base 1, the external thread 451 matches with the internal thread 141, the mounting element 4 is connected to the fixing base 1 through the external thread 451 and the internal thread 141, the coaxiality between the mounting element 4 and the fixing base 1 in the assembling process is ensured, and the accuracy of positioning the spraying position of the laser emitter 3 is ensured.

As shown in fig. 6 to 8, the shape of the laser emitter 3 in the spray gun calibration device according to the second embodiment of the present specification is the same as that of the laser emitter 3 according to the first embodiment, and the specific structural shape may refer to the laser emitter 3 according to the first embodiment, which is not described herein again.

Correspondingly, the other end face 12 of the fixed seat 1 along the first direction is provided with a containing groove 16, the end face 161 of the containing groove 16 along the first direction is provided with a first positioning face 13, the shape of the first positioning face 13 corresponds to the shape of one end 32 (namely, the second part 34) of the laser emitter 3 far away from the laser emitting port 31, the first positioning face is a spherical end face, the shape and size of the containing groove 16 are the same as those of the third part 35 of the laser emitter 3, the containing groove is a cylindrical cavity, the laser emitter 3 is contained in the containing groove 16, and specifically, the third part 35 of the laser emitter 3 is contained in the containing groove 16 to radially position the laser emitter 3. When installed part 4 and fixing base 1 set up the one end 14 of first locating surface 13 and link to each other, laser emitter 3 keeps away from a terminal surface 32 and the looks butt of first locating surface 13 of laser emission mouth 31, laser emitter 3 sets up a terminal surface 36 and the installed part 4 looks butt near laser emitter 3's terminal surface 44 of laser emission mouth 31, thereby carry out axial positioning to laser emitter 3, fix laser emitter 3 on fixing base 1, and guarantee that the axis of spray gun 5's nozzle 52 and laser emitter 3's the axis coincidence of laser emission mouth 31, ensure the precision of laser emitter 3 location spraying position.

One end 45 of the mounting member 4 close to the fixing base 1 in the second embodiment of the present description is screwed with one end 14 of the fixing base 1 provided with the first positioning surface 13. For example, as shown in fig. 7 and 8, an external thread 142 is formed on the end 14 of the fixing base 1, which is provided with the first positioning surface 13, an internal thread 452 is formed on the end 45 of the mounting element 4, which is close to the fixing base 1, the external thread 142 is matched with the internal thread 452, the mounting element 4 is connected to the fixing base 1 through the external thread 142 and the internal thread 452, and the coaxiality of the mounting element 4 and the fixing base 1 is ensured in the assembling process.

As shown in fig. 9 to 11, the laser emitter 3 in the spray gun calibration device according to the third embodiment of the present disclosure is a cylinder, and accordingly, a cavity 43 for accommodating the laser emitter 3 is disposed inside the mounting member 4, the cavity 43 is a cylinder corresponding to the shape and size of the laser emitter 3, and the first positioning surface 13 of the fixing base 1 corresponds to the end 32 of the laser emitter 3 away from the laser emitting port 31 and is a plane corresponding to the end 32 of the laser emitter 3. When installed part 4 and fixing base 1 set up the one end 14 of first locating surface 13 and link to each other, laser emitter 3 holding is in cavity 43, makes laser emitter 3 fix on installed part 4, and laser emitter 3 keeps away from a terminal surface 32 and the looks butt of first locating surface 13 of laser emission mouth 31 to laser emitter 3 is fixed on fixing base 1 by installed part 4, and guarantees that the axis of laser emission mouth 31 of laser emitter 3 coincides with the axis of the nozzle 52 of spray gun 5.

The connection between the mounting member 4 and the fixing base 1 is the same as that described in the first embodiment, and one end 45 of the mounting member 4 close to the fixing base 1 is in threaded connection with one end 14 of the fixing base 1, which is provided with the first positioning surface 13. For example, as shown in fig. 10 and 11, an internal thread 141 is formed on the end 14 of the fixing base 1 where the first positioning surface 13 is disposed, an external thread 451 is formed on the end 45 of the mounting element 4 close to the fixing base 1, the external thread 451 is matched with the internal thread 141, the mounting element 4 is connected to the fixing base 1 through the external thread 451 and the internal thread 141, and the coaxiality of the mounting element 4 and the fixing base 1 in the assembling process is ensured, so that the accuracy of positioning the spraying position of the laser emitter 3 is ensured.

To sum up, this specification discloses a spray gun calibrating device, threaded connection between installed part and the fixing base makes laser emitter fix on the fixing base, and the fixing base overlaps through a plurality of coupling parts and establishes on the outer wall of spray gun, moves along with the spray gun, and the fixing base drives laser emitter and moves together, and the ray that laser emitter sent throws on the piece of being sprayed to the spraying position of representative spray gun.

Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes shown in the figures are not necessarily required to practice the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A spray gun calibration device, comprising:

2. The spray gun calibration device of claim 1 wherein a second locating surface is provided on an end surface of the coupling member on which the holder is provided, and wherein when the spray gun calibration device is in an operating state, an end of the spray gun-providing nozzle abuts against the second locating surface to axially locate the spray gun.

3. The spray gun calibration device according to claim 2, wherein the coupling member includes a connecting portion extending from a periphery of an end surface of the fixed seat in the first direction in a direction away from the fixed seat, and a fixing portion integrally connected to an end of the connecting portion away from the fixed seat, the fixing portion having a third positioning surface extending in the first direction, and the third positioning surface abuts against an outer side surface of the spray gun to radially position and fix the spray gun when the spray gun calibration device is in an operating state.

4. The spray gun calibration device of claim 3 wherein the coupling member comprises a resilient material.

5. The spray gun calibration device of claim 3 wherein an end of the fixing portion distal from the connecting portion is provided with a chamfer on the third locating surface distal from the central axis of the mounting seat.

6. The spray gun calibration device according to claim 3, wherein in the first direction, a distance between one side of the third positioning surface close to the fixed seat and the second positioning surface ranges from 15 mm to 20 mm.

7. The spray gun calibration device according to claim 1, wherein the laser emitter comprises a first part, a second part and a third part connecting the first part and the second part, the first part is a conical surface, the second part is a spherical end surface, the third part is a cylindrical structure, a laser emitting port of the laser emitter is arranged at one end of the first part far away from the third part,

8. The spray gun calibration device as claimed in claim 1, wherein the laser emitter is a cylindrical structure, a cavity for accommodating the laser emitter is arranged inside the mounting member, the cavity is a cylinder and corresponds to the shape and size of the laser emitter,

9. The spray gun calibration device according to claim 1, wherein a receiving groove is formed in the other end face of the fixing base along the first direction, the first positioning surface is formed in the end face of the receiving groove along the first direction, the laser emitter is received in the receiving groove to radially position the laser emitter, the mounting piece is connected with one end of the fixing base, provided with the first positioning surface, of the laser emitter, one end face of the laser emitter, far away from the laser emitting port, abuts against the first positioning surface, one end face of the laser emitter, provided with the laser emitting port, abuts against the end face of the mounting piece, close to the laser emitter, and the laser emitter is axially positioned.

10. The spray gun calibration device of any one of claims 7 to 9 wherein an end of the mounting member adjacent the mounting block is threadedly coupled to an end of the mounting block at which the first locating surface is provided.