CN107774479B - Automatic spraying equipment and method for outer heat-resistant coating - Google Patents

Automatic spraying equipment and method for outer heat-resistant coating Download PDF

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Publication number
CN107774479B
CN107774479B CN201711193564.1A CN201711193564A CN107774479B CN 107774479 B CN107774479 B CN 107774479B CN 201711193564 A CN201711193564 A CN 201711193564A CN 107774479 B CN107774479 B CN 107774479B
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workpiece
spraying
sprayed
driving wheel
driving
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CN107774479A (en
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肖勇
范开春
陈海亚
周超
马雪松
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Hubei Hangju Technology Co ltd
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Hubei Hangju Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/084—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to condition of liquid or other fluent material already sprayed on the target, e.g. coating thickness, weight or pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Spray Control Apparatus (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The invention relates to an automatic spraying device and a spraying method of an external heat-resistant coating, wherein the automatic spraying device comprises: the spraying device comprises a control device, a workpiece conveying tool, a workpiece rotating tool and a spraying robot, wherein the workpiece conveying tool is used for clamping a workpiece to be sprayed and conveying the workpiece to be sprayed to a spraying station; the workpiece rotating tool is arranged on the workpiece conveying tool, a workpiece to be sprayed is sleeved on the workpiece rotating tool, and the workpiece rotating tool is used for driving the workpiece to be sprayed to perform self-rotation under the control of the control device; the spraying robot is arranged beside the spraying station and used for spraying an outer heat-resistant coating on the self-rotating workpiece to be sprayed under the control of the control device. By the technical scheme, the problems of complex structure, high cost and low spraying thickness precision of automatic spraying equipment in the prior art can be solved.

Description

Automatic spraying equipment and method for outer heat-resistant coating
Technical Field
The invention relates to the technical field of thermal protection layer spraying equipment, in particular to automatic spraying equipment for an external thermal protection coating and a spraying method thereof.
Background
At present, the formation of the domestic heat-resistant layer can be divided into: manual spraying, automatic spraying, etc. The manually sprayed heat-proof layer has the problems of poor surface uniformity and difficult control of the thickness of the coating, and the thickness requirement can be generally met only by manually polishing, so that the labor intensity is high, and the product quality consistency is poor. The automatic spraying heat-proof layer can improve the spraying quality, ensure the consistency of the spraying quality of products, improve the automation level of the heat-proof coating forming and reduce the manual input time. However, the automatic spraying equipment for the heat-resistant layer in the prior art has a complex structure, which makes the product cost high, and meanwhile, people with related expertise are required to operate the equipment, so that the user population is limited. Meanwhile, the control of the spraying thickness of the thermal-protection layer in the prior art is mainly evaluated by manual eye force, and the control precision of the spraying thickness is not high.
Disclosure of Invention
In view of the above, the invention aims to overcome the defects of the prior art, and provides an automatic spraying device and a spraying method for an external heat-resistant coating, so as to solve the problems of complex structure, high cost and low spraying thickness precision of the automatic spraying device in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an outer thermal protection coating automatic spray coating device comprising: a control device, a workpiece conveying tool, a workpiece rotating tool and a spraying robot, wherein,
the workpiece conveying tool is used for clamping a workpiece to be sprayed and conveying the workpiece to be sprayed to a spraying station; the workpiece rotating tool is arranged on the workpiece conveying tool, a workpiece to be sprayed is sleeved on the workpiece rotating tool, and the workpiece rotating tool is used for driving the workpiece to be sprayed to perform self-rotation under the control of the control device; the spraying robot is arranged beside the spraying station and used for spraying an outer heat-resistant coating on the self-rotating workpiece to be sprayed under the control of the control device.
Preferably, the workpiece conveying tool comprises: the ground rail, the driving end workpiece trolley and the driven end workpiece trolley are connected through a connecting rod and then are arranged on the ground rail in a sliding mode;
the driving end workpiece trolley is provided with a driving end bracket, and the driven end workpiece trolley is provided with a driven end bracket; the workpiece rotating tool frame is arranged on the driving end support and the driven end support.
Preferably, the connecting rod is a telescopic connecting rod and is used for adjusting the distance between the driving end workpiece trolley and the driven end workpiece trolley so as to adapt to transporting workpieces to be sprayed with different lengths.
Preferably, the workpiece rotating tool includes: a driving end workpiece rotating tool, a driven end workpiece rotating tool and a rotating shaft, wherein,
the rotatory frock of drive end work piece sets up on the drive end support, includes: the device comprises a first servo motor, a second servo motor, a first driving wheel and a second driving wheel, wherein the first driving wheel and the second driving wheel are respectively sleeved on output shafts of the first servo motor and the second servo motor, and the first driving wheel and the second driving wheel are positioned on the same horizontal plane and are spaced by a preset distance;
the rotatory frock of driven end work piece sets up on the driven end support, includes: the device comprises a third servo motor, a fourth servo motor, a third driving wheel and a fourth driving wheel, wherein the third driving wheel and the fourth driving wheel are respectively sleeved on output shafts of the third servo motor and the fourth servo motor, and are positioned on the same horizontal plane and are spaced by a preset distance;
one end of the rotating shaft is arranged on the first driving wheel and the second driving wheel, and the outer circumference of the rotating shaft at the end is matched with the first driving wheel and the second driving wheel respectively; the other end of the rotating shaft is arranged on the third driving wheel and the fourth driving wheel, and the outer circumference of the rotating shaft at the end is respectively matched with the third driving wheel and the fourth driving wheel; the workpiece to be sprayed is sleeved on the rotating shaft.
Preferably, the rotation axis is parallel to the ground rail.
Preferably, the spraying robot includes: an X-axis telescopic arm, a Y-axis sliding rail, a Z-axis lifting arm and a spray gun, wherein,
a screw rod is arranged in the Y-axis sliding rail, a sliding block is sleeved on the screw rod, the fixed end of the Z-axis lifting arm is arranged on the sliding block, and the movable end is fixed with the fixed end of the X-axis telescopic arm; the movable end of the X-axis telescopic arm faces to the spraying station, and the spray gun is fixed on the movable end of the X-axis telescopic arm;
the Z-axis lifting arm is perpendicular to the Y-axis sliding rail and is perpendicular to the X-axis telescopic arm, and the X-axis telescopic arm is perpendicular to the Y-axis sliding rail.
Preferably, the Y-axis sliding rail is parallel to a ground rail of the workpiece conveying tool.
Preferably, the Y-axis sliding rail is erected on the horizontal ground, and the side wall of the fixed end of the Z-axis lifting arm is fixed on the sliding block.
Preferably, a base is arranged below the Y-axis sliding rail, and the base is used for supporting and fixing the Y-axis sliding rail.
Preferably, the control device comprises a processor, a first driving circuit, a second driving circuit and a touch screen, wherein the first driving circuit, the second driving circuit and the touch screen are respectively and electrically connected with the processor, and the output ends of the first driving circuit and the second driving circuit are respectively and electrically connected with the workpiece rotating tool and the spraying robot.
In addition, the invention also provides a spraying method of the automatic spraying equipment for the external heat-resistant coating, which comprises the following steps:
s1, after spraying an external heat-resistant layer X, measuring the total thickness T of the sprayed external heat-resistant layer by a needling method x The method comprises the steps of carrying out a first treatment on the surface of the Wherein x is more than or equal to 2, and is preset by a user;
step S2, obtaining the thickness T1 of each outer heat protection layer according to the formula t1=tx/x;
step S3, calculating the theoretical number of layers N to be sprayed according to a formula N=an upper limit value Y/T1 of the total thickness of the outer heat-resistant layer; wherein Y is more than 0, and is preset for a user;
s4, after spraying the N-1 layer, measuring the total thickness TN-1 of the sprayed outer heat-proof layer by a needling method;
s5, if TN-1 is more than or equal to Y, finishing spraying; if TN-1 is less than Y, spraying a layer of the coating and then finishing the spraying;
and S6, measuring the total thickness T of the sprayed outer heat-resistant layer by a needling method.
Preferably, the spraying method of the automatic spraying equipment for the outer heat-resistant coating further comprises the following steps:
when spraying, the pressure range of compressed air in the spray gun is controlled to be 0.3 MPa-0.4 MPa, and the spray distance range is controlled to be 170-200 mm;
according to the formula: n=120×v/L, t=n×pi D/60, calculating the travel speed V of the spray gun and the self-rotation speed n of the workpiece to be sprayed; wherein D is the diameter of the workpiece to be sprayed and is a known value; l is the spraying width, the value range is 180 mm-220 mm, and the value is a known value; t is the spraying linear velocity, the value range is 300 mm/s-400 mm/s, and the T is a known value.
The invention adopts the technical proposal and has at least the following beneficial effects:
according to the technical scheme, the automatic spraying equipment for the external heat-resistant coating provided by the invention has the advantages that the workpiece conveying tool can clamp a workpiece to be sprayed and convey the workpiece to be sprayed to a spraying station; the workpiece rotating tool is arranged on the workpiece conveying tool, a workpiece to be sprayed is sleeved on the workpiece rotating tool, and the workpiece rotating tool can drive the workpiece to be sprayed to perform self-rotation under the control of the control device; the spraying robot is arranged beside the spraying station and can spray an outer heat-resistant coating on the self-rotating workpiece to be sprayed under the control of the control device. Compared with the prior art, the automatic spraying equipment for the external heat-resistant coating is simple in structure, does not need to be manually participated in the working process, has low requirements on operators, and can adapt to the use requirements of different groups.
According to the spraying method of the automatic spraying equipment for the outer heat-resistant coating, the average thickness value of each outer heat-resistant layer is obtained, and then the theoretical total number of spraying layers is obtained by presetting the upper limit value of the total thickness of the outer heat-resistant layer and the average thickness value of each outer heat-resistant layer; before the spraying is finished (after spraying the N-1 layer), the actual spraying thickness is compared with the upper limit value of the total thickness of the preset outer heat-resistant layer, so that whether the spraying is finished or the spraying is continued is judged. Compared with the prior art, the spraying method of the automatic spraying equipment for the outer heat-resistant coating is realized through a preset algorithm, the process of manually participating in spraying is avoided, the spraying thickness precision is high, the spraying surface is relatively smooth, and the fullness of the coating can be improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of an automatic spraying device for an outer heat-resistant coating according to an embodiment of the present invention;
FIG. 2 is a front view of an automatic spraying apparatus for an outer thermal protective coating according to an embodiment of the present invention;
FIG. 3 is a side view of an automatic spraying apparatus for an outer thermal protective coating according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a spraying method of an automatic spraying device for an outer heat-resistant coating according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Referring to fig. 1, an embodiment of the present invention provides an automatic spraying apparatus for an outer thermal protection coating, including: control means (not shown in the drawings), work conveying tools (see 1, 2, 3, 4 in fig. 1), work rotating tools (see 22, 23, 5 in fig. 1) and painting robots (see 6, 7, 8, 9 in fig. 1), wherein,
the workpiece conveying tool is used for clamping a workpiece to be sprayed and conveying the workpiece to be sprayed to a spraying station; the workpiece rotating tool is arranged on the workpiece conveying tool, a workpiece to be sprayed is sleeved on the workpiece rotating tool, and the workpiece rotating tool is used for driving the workpiece to be sprayed to perform self-rotation under the control of the control device; the spraying robot is arranged beside the spraying station and used for spraying an outer heat-resistant coating on the self-rotating workpiece to be sprayed under the control of the control device.
According to the technical scheme, the automatic spraying equipment for the external heat-resistant coating provided by the invention has the advantages that the workpiece conveying tool can clamp a workpiece to be sprayed and convey the workpiece to be sprayed to a spraying station; the workpiece rotating tool is arranged on the workpiece conveying tool, a workpiece to be sprayed is sleeved on the workpiece rotating tool, and the workpiece rotating tool can drive the workpiece to be sprayed to perform self-rotation under the control of the control device; the spraying robot is arranged beside the spraying station and can spray an outer heat-resistant coating on the self-rotating workpiece to be sprayed under the control of the control device. Compared with the prior art, the automatic spraying equipment for the external heat-resistant coating is simple in structure, does not need to be manually participated in the working process, has low requirements on operators, and can adapt to the use requirements of different groups.
Referring to fig. 2, preferably, the workpiece conveying tool includes: the ground rail 1, the driving end workpiece trolley 2 and the driven end workpiece trolley 3 are connected through a connecting rod 4, and then are arranged on the ground rail 1 in a sliding manner;
a driving end bracket 21 is arranged on the driving end workpiece trolley 2, and a driven end bracket (not shown in the drawing) is arranged on the driven end workpiece trolley 3; the workpiece rotating fixture is erected on the driving end bracket 21 and the driven end bracket.
Preferably, the connecting rod 4 is a telescopic connecting rod and is used for adjusting the distance between the driving end workpiece trolley 2 and the driven end workpiece trolley 3 so as to adapt to transporting workpieces to be sprayed with different lengths.
Referring to fig. 3, preferably, the workpiece rotation tool includes: a driving end workpiece rotating tool, a driven end workpiece rotating tool (not shown in the drawings), and a rotating shaft 5, wherein,
the rotatory frock of drive end work piece sets up on drive end support 21, includes: a first servo motor (not shown in the drawing), a second servo motor (not shown in the drawing), and a first driving wheel 22 and a second driving wheel 23 respectively sleeved on output shafts of the first servo motor and the second servo motor, wherein the first driving wheel 22 and the second driving wheel 23 are positioned on the same horizontal plane and are spaced by a preset distance;
the rotatory frock of driven end work piece sets up on the driven end support, includes: the device comprises a third servo motor, a fourth servo motor, a third driving wheel and a fourth driving wheel, wherein the third driving wheel and the fourth driving wheel are respectively sleeved on output shafts of the third servo motor and the fourth servo motor, and are positioned on the same horizontal plane and are spaced by a preset distance;
one end of the rotating shaft 5 is provided on the first and second driving wheels 22 and 23, and the outer circumference of the rotating shaft 5 at the end is engaged with the first and second driving wheels 22 and 23, respectively; the other end of the rotating shaft 5 is arranged on the third driving wheel and the fourth driving wheel, and the outer circumference of the rotating shaft 5 at the end is respectively matched with the third driving wheel and the fourth driving wheel; the workpiece to be sprayed is sleeved on the rotating shaft 5.
It can be understood that when the first driving wheel and the second driving wheel rotate, one end of the rotating shaft can be driven to rotate; when the third driving wheel and the fourth driving wheel rotate, the other end of the rotating shaft can be driven to rotate, and the rotating shaft rotates to drive the workpiece to be sprayed, which is sleeved on the rotating shaft, to rotate, so that each surface of the workpiece to be sprayed can be sprayed with paint.
In order to ensure that the rotation shaft is smoothly rotated, the rotation speeds and rotation directions of the first, second, third and fourth driving wheels must be uniform.
It can be understood that the automatic spraying equipment for the external heat-resistant coating provided by the invention has the advantages that the heat-resistant layer is spirally sprayed, so that the uniformity of spraying can be well ensured, the spraying surface is relatively smooth, and the fullness of the coating is improved.
Preferably, the rotation axis 5 is parallel to the ground rail 1.
Preferably, the spraying robot includes: an X-axis telescopic arm 6, a Y-axis sliding rail 7, a Z-axis lifting arm 8 and a spray gun 9, wherein,
a screw rod is arranged in the Y-axis sliding rail 7, a sliding block is sleeved on the screw rod, the fixed end of the Z-axis lifting arm 8 is arranged on the sliding block, and the movable end is fixed with the fixed end of the X-axis telescopic arm 6; the movable end of the X-axis telescopic arm 6 faces to a spraying station, and the spray gun 9 is fixed on the movable end;
the Z-axis lifting arm 8 is perpendicular to the Y-axis sliding rail 7 and is perpendicular to the X-axis telescopic arm 6, and the X-axis telescopic arm 6 is perpendicular to the Y-axis sliding rail 7.
It is understood that the Y-axis slide rail controls the length of the spray coating, the X-axis telescopic arm controls the width of the spray coating, and the Z-axis lifting arm controls the thickness of the spray coating.
Preferably, the Y-axis sliding rail 7 is parallel to the ground rail 1 of the workpiece conveying tool.
Preferably, the Y-axis sliding rail 7 is erected on the horizontal ground, and the side wall of the fixed end of the Z-axis lifting arm 8 is fixed on the sliding block.
Preferably, a base 71 is arranged below the Y-axis sliding rail 7, and the base 71 is used for supporting and fixing the Y-axis sliding rail 7.
Preferably, the control device comprises a processor, a first driving circuit, a second driving circuit and a touch screen, wherein the first driving circuit, the second driving circuit and the touch screen are respectively and electrically connected with the processor, and the output ends of the first driving circuit and the second driving circuit are respectively and electrically connected with the workpiece rotating tool and the spraying robot.
It can be understood that the user can set parameters such as spraying pressure, spraying distance, spraying width, thickness and the like of the spraying robot through the touch screen.
Referring to fig. 4, in addition, the invention further provides a spraying method of the automatic spraying equipment for the external heat-resistant coating, which comprises the following steps:
s1, after spraying an external heat-resistant layer X, measuring the total thickness T of the sprayed external heat-resistant layer by a needling method x The method comprises the steps of carrying out a first treatment on the surface of the Wherein x is more than or equal to 2, and is preset by a user;
step S2, according to formula T 1 ＝T x And x, obtaining the thickness T of each outer heat-proof layer 1 ；
Step S3, according to the formula N=the upper limit value Y/T of the total thickness of the outer heat-proof layer 1 Calculating the theoretical number of layers N to be sprayed; wherein Y is more than 0, and is preset for a user;
s4, after spraying the N-1 layer, measuring the total thickness T of the sprayed outer heat-proof layer by a needling method N-1 ；
Step S5, if T N-1 The spraying is finished if the temperature is not less than Y; if T N-1 Less than Y, spraying a layer of the coating material, and ending the spraying；
And S6, measuring the total thickness T of the sprayed outer heat-resistant layer by a needling method.
It can be appreciated that the spraying construction of the outer heat-proof layer is currently performed by using an automatic spraying device. The automatic spraying track is a spiral line, the spraying coverage rate is high, and the automatic spraying pressure, the spraying distance and the spraying width are constant values. According to the construction experience of the outer heat-resistant layer, the coating thickness of each workpiece should be basically consistent due to the fact that the viscosity of the coating is consistent and the environmental temperature is not greatly changed in the coating spraying process of the workpiece.
According to the technical scheme, the spraying method of the automatic spraying equipment for the outer heat-resistant coating, provided by the invention, comprises the steps of firstly obtaining the average thickness value of each outer heat-resistant layer, and then obtaining the theoretical total number of spraying layers by presetting the upper limit value of the total thickness of the outer heat-resistant layer and the average thickness value of each outer heat-resistant layer; before the spraying is finished (after spraying the N-1 layer), the actual spraying thickness is compared with the upper limit value of the total thickness of the preset outer heat-resistant layer, so that whether the spraying is finished or the spraying is continued is judged. Compared with the prior art, the spraying method of the automatic spraying equipment for the outer heat-resistant coating is realized through a preset algorithm, the process of manually participating in spraying is avoided, the spraying thickness precision is high, the spraying surface is relatively smooth, and the fullness of the coating can be improved.
Preferably, the spraying method of the automatic spraying equipment for the outer heat-resistant coating further comprises the following steps:
when spraying, the pressure range of compressed air in the spray gun is controlled to be 0.3 MPa-0.4 MPa, and the spray distance range is controlled to be 170-200 mm;
according to the formula: n=120×v/L, t=n×pi D/60, calculating the travel speed V of the spray gun and the self-rotation speed n of the workpiece to be sprayed; wherein D is the diameter of the workpiece to be sprayed and is a known value; l is the spraying width, the value range is 180 mm-220 mm, and the value is a known value; t is the spraying linear velocity, the value range is 300 mm/s-400 mm/s, and the T is a known value.
It should be noted that: 1. the size of a paint mist sector can be controlled by adjusting the spraying width of the spray gun, the spraying width is too large, the surface of a coating is easy to be fluffed, and the waste of the coating is large; too small spray width, poor atomization of the paint, rough paint film, easy long wave orange peel, uneven surface of the coating or sagging of the paint. In view of the characteristics of the paint, the spray width is selected to be 180-220 mm.
2. Because paint mist is generally fan-shaped, a correlation exists between the spray distance and the spray width, and one adjustment needs to be correspondingly adjusted. Generally, the thickness should be controlled to 170-200 mm. Too large a distance will not only affect the utilization of the coating, but also adversely affect the smoothness of the coating.
3. The heat-proof layer adopts spiral spraying, so that the uniformity of spraying can be well ensured, the spraying surface is relatively smooth, and the fullness of the coating is improved. However, if the rotation speed n of the spiral spraying workpiece and the travelling speed V of the spray gun are improperly selected, the surface of the coating is spiral or the coating is sagging.
The rotation speed n and the spray gun walking speed V are generally calculated according to the following formula: n=120×v/L, where L is the spray width, the range of values is 180mm to 220mm, and the median value is generally taken. Whereas the rotational speed n is related to the linear velocity T of the spray coating, which is typically between 300mm/s and 400 mm/s. T=n·pi D/60, where D is the workpiece diameter. From the above formula, it can be calculated: workpiece rotational speed n=6.25 r/min, torch travel speed v=5 mm/s.
4. The spray compressed air pressure is an important factor affecting the paint film thickness. The surface effect of the coating is optimal when the air pressure reaches the critical state of sagging. Therefore, the pressure of the compressed air can be controlled according to the actual production condition, so that the sprayed paint is always ensured to be in a quasi-flowing and non-flowing state, and the best spraying effect is controlled to be between 0.3 and 0.4 MPa.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are 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. The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

Claims (9)

1. An automatic exterior thermal protection coating spraying apparatus, comprising: a control device, a workpiece conveying tool, a workpiece rotating tool and a spraying robot, wherein,
the workpiece conveying tool is used for clamping a workpiece to be sprayed and conveying the workpiece to be sprayed to a spraying station; the workpiece rotating tool is arranged on the workpiece conveying tool, a workpiece to be sprayed is sleeved on the workpiece rotating tool, and the workpiece rotating tool is used for driving the workpiece to be sprayed to perform self-rotation under the control of the control device; the spraying robot is arranged beside the spraying station and is used for spraying an outer heat-resistant coating on the self-rotating workpiece to be sprayed under the control of the control device;
the spraying method of the equipment comprises the following steps:
s1, after an x-layer outer heat-resistant layer is sprayed, measuring the total thickness Tx of the sprayed outer heat-resistant layer by a needling method; wherein x is more than or equal to 2, and is preset by a user;
step S2, obtaining the thickness T1 of each outer heat protection layer according to the formula t1=tx/x;
step S3, calculating the theoretical number of layers N to be sprayed according to a formula N=an upper limit value Y/T1 of the total thickness of the outer heat-resistant layer; wherein Y is more than 0, and is preset for a user;
s4, after spraying the N-1 layer, measuring the total thickness TN-1 of the sprayed outer heat-proof layer by a needling method;
s5, if TN-1 is more than or equal to Y, finishing spraying; if TN-1 is less than Y, spraying a layer of the coating and then finishing the spraying;
and S6, measuring the total thickness T of the sprayed outer heat-resistant layer by a needling method.
2. The outer thermal protection coating automatic spraying apparatus according to claim 1, wherein the work conveying tool comprises: the ground rail, the driving end workpiece trolley and the driven end workpiece trolley are connected through a connecting rod and then are arranged on the ground rail in a sliding mode;
the driving end workpiece trolley is provided with a driving end bracket, and the driven end workpiece trolley is provided with a driven end bracket; the workpiece rotating tool frame is arranged on the driving end support and the driven end support.
3. The automatic spraying equipment for the outer heat-resistant coating according to claim 2, wherein the connecting rod is a telescopic connecting rod and is used for adjusting the distance between the driving end workpiece trolley and the driven end workpiece trolley so as to adapt to transporting workpieces to be sprayed with different lengths.
4. The outer thermal protection coating automatic spraying apparatus according to claim 2, wherein the work rotating fixture comprises: a driving end workpiece rotating tool, a driven end workpiece rotating tool and a rotating shaft, wherein,
the rotatory frock of drive end work piece sets up on the drive end support, includes: the device comprises a first servo motor, a second servo motor, a first driving wheel and a second driving wheel, wherein the first driving wheel and the second driving wheel are respectively sleeved on output shafts of the first servo motor and the second servo motor, and the first driving wheel and the second driving wheel are positioned on the same horizontal plane and are spaced by a preset distance;
the rotatory frock of driven end work piece sets up on the driven end support, includes: the device comprises a third servo motor, a fourth servo motor, a third driving wheel and a fourth driving wheel, wherein the third driving wheel and the fourth driving wheel are respectively sleeved on output shafts of the third servo motor and the fourth servo motor, and are positioned on the same horizontal plane and are spaced by a preset distance;
one end of the rotating shaft is arranged on the first driving wheel and the second driving wheel, and the outer circumference of the rotating shaft at the end is matched with the first driving wheel and the second driving wheel respectively; the other end of the rotating shaft is arranged on the third driving wheel and the fourth driving wheel, and the outer circumference of the rotating shaft at the end is respectively matched with the third driving wheel and the fourth driving wheel; the workpiece to be sprayed is sleeved on the rotating shaft.
5. The outer thermal protection coating automatic spray coating device of claim 4, wherein the axis of rotation is parallel to the ground rail.
6. The outer thermal protection coating automatic spray apparatus of claim 2, wherein the spray robot comprises: an X-axis telescopic arm, a Y-axis sliding rail, a Z-axis lifting arm and a spray gun, wherein,
a screw rod is arranged in the Y-axis sliding rail, a sliding block is sleeved on the screw rod, the fixed end of the Z-axis lifting arm is arranged on the sliding block, and the movable end is fixed with the fixed end of the X-axis telescopic arm; the movable end of the X-axis telescopic arm faces to the spraying station, and the spray gun is fixed on the movable end of the X-axis telescopic arm;
the Z-axis lifting arm is perpendicular to the Y-axis sliding rail and is perpendicular to the X-axis telescopic arm, and the X-axis telescopic arm is perpendicular to the Y-axis sliding rail.
7. The automatic spraying equipment for the outer heat-resistant coating according to claim 6, wherein the Y-axis sliding rail is parallel to a ground rail of the workpiece conveying tool; the Y-axis sliding rail is laterally erected on the horizontal ground, and the side wall of the fixed end of the Z-axis lifting arm is fixed on the sliding block.
8. The automatic spraying equipment for the outer heat-resistant coating according to any one of claims 1 to 7, wherein the control device comprises a processor, a first driving circuit, a second driving circuit and a touch screen, wherein the first driving circuit, the second driving circuit and the touch screen are respectively electrically connected with the processor, and output ends of the first driving circuit and the second driving circuit are respectively electrically connected with the workpiece rotating tool and the spraying robot.
9. The outer thermal protective coating automatic spray coating apparatus of claim 1, wherein the spray coating method further comprises:
when spraying, the pressure range of compressed air in the spray gun is controlled to be 0.3 MPa-0.4 MPa, and the spray distance range is controlled to be 170-200 mm;
according to the formula: n=120×v/L, t=n×pi D/60, calculating the travel speed V of the spray gun and the self-rotation speed n of the workpiece to be sprayed; wherein D is the diameter of the workpiece to be sprayed and is a known value; l is the spraying width, the value range is 180 mm-220 mm, and the value is a known value; t is the spraying linear velocity, the value range is 300 mm/s-400 mm/s, and the T is a known value.
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