CN115502074B - Inner hole spraying process and system for deep blind hole structural part - Google Patents
Inner hole spraying process and system for deep blind hole structural part Download PDFInfo
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- CN115502074B CN115502074B CN202211172736.8A CN202211172736A CN115502074B CN 115502074 B CN115502074 B CN 115502074B CN 202211172736 A CN202211172736 A CN 202211172736A CN 115502074 B CN115502074 B CN 115502074B
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- 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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
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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
- B05B13/06—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 specially designed for treating the inside of hollow bodies
- B05B13/0645—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 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation
- B05B13/0654—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 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation and a treating nozzles being translated through the hollow bodies in a direction essentially parallel to the rotational axis
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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
- B05B13/06—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 specially designed for treating the inside of hollow bodies
- B05B13/0645—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 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation
- B05B13/0681—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 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation the hollow bodies comprising a closed end to be treated
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- 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
Abstract
The invention discloses an inner hole spraying process of a deep blind hole structural part, which comprises the following steps of: s1, pretreatment of a coating; s2: checking and adjusting the air pressure and the spray head angle in the spraying system gas circuit, so that the spray head inclines towards the blind hole end, and ensuring that the liquid sprayed by the spray head is fully atomized; s3: installing a thread protection sleeve at the opening end of the part, and installing the blind hole end of the part into a chuck of coating equipment, wherein the sectional area of the blind hole end is gradually smaller; s4: and placing the spray gun nozzle at an initial position, controlling the part to rotate at a rotating speed alpha under the rotation of the chuck clamp, opening the spray gun to enable the spray gun to longitudinally move from inside to outside to a stroke end at a displacement speed v for spraying, and carrying out at least one spraying according to the thickness of the coating, wherein the spray gun nozzle stays at the initial position for a set time when spraying each time until the spraying is finished. The invention also discloses a corresponding spraying system. The invention can ensure that the gas in the blind hole is fully discharged, eliminate the air blocking rebound at the bottom of the blind hole and ensure uniform spraying.
Description
Technical Field
The invention belongs to the technical field of spraying processes, and particularly relates to an inner hole spraying process of a deep blind hole structural part with a large length-diameter ratio.
Background
In the prior art, when shellac paint is sprayed on the inner surface of a part with a large length-diameter ratio deep blind hole structure, the part is usually clamped on a spraying switching device, and the part is sprayed by moving to the inner cavity of the part in the horizontal direction through a long rod spray gun. However, due to the special structure of the deep blind hole with the large length-diameter ratio, the aperture of the blind hole in the inner cavity is gradually reduced, and the air flow formed by atomizing and mixing the compressed air and the coating meets resistance at the bottom of the blind hole in the cavity, so that outward air pressure is formed, the air blocking and rebound can be caused, and finally the problems of poor spraying uniformity, sagging, uneven thickness and the like of the coating layer at the bottom can be caused. Meanwhile, the splash of paint mist enables a large amount of adhesive paint to be adhered to the internal threads, and the workload of thread cleaning in the later spraying period is increased.
Therefore, it is necessary to provide an inner hole spraying process suitable for deep blind hole structural parts with large length-diameter ratio.
Disclosure of Invention
Aiming at one or more of the defects or improvement demands of the prior art, the invention provides an inner hole spraying process and system for a deep blind hole structural part, which can ensure that gas in a blind hole is fully discharged, eliminate the air blockage rebound at the bottom of the blind hole and ensure uniform spraying.
In order to achieve the above object, according to one aspect of the present invention, there is provided an inner hole spraying process for a deep blind hole structural part, comprising the steps of:
s1, pretreatment of a coating;
s2: synchronously with the step S1, checking and adjusting the air pressure and the spray head angle in the spraying system gas circuit to enable the spray head to incline towards the blind hole end, and ensuring that the liquid sprayed by the spray head is fully atomized;
s3: installing a thread protection sleeve at the opening end of the part, and installing the blind hole end of the part into a chuck of coating equipment, wherein the sectional area of the blind hole end is gradually smaller;
the part is controlled to rotate at a rotating speed alpha under the rotation of the chuck, the spray gun nozzle is placed at an initial position, and the spray gun is opened, so that the spray gun longitudinally moves from the blind hole end to the opening end to a stroke end at a displacement speed v, and one-time spraying is completed; and (3) spraying at least once according to the thickness of the coating, returning the spray head to the initial position when spraying is carried out for the next time, and staying at the initial position for a set time when spraying is carried out each time until the spraying is finished.
As a further improvement of the invention, the initial position is that the linear distance from the top end of the blind hole is 50-120 mm and the distance from the axis of the chuck is 25-40 mm; the stroke end point is 50 mm-120 mm away from the end face of the thread protecting sleeve and 25 mm-40 mm away from the axis of the chuck.
In S4, the spray head stays at the initial position for a first time, then performs unidirectional spraying from inside to outside, stops spraying after reaching the end of the stroke, returns immediately, stays at the initial position for a second time, and repeats according to the stay time when spraying later.
As a further improvement of the invention, the first time is 3s to 5s, and the second time is 4s to 6s.
As a further improvement of the invention, after the spraying is finished, the chuck automatically stops running after the part rotates for a third time; the third time is 30 s-60 s.
As a further improvement of the invention, the rotating speed alpha is 300-800 r/min, and the displacement speed v of the spray gun is 6-10 m/min; the pressure of the compressed air in the spray gun is 0.3-0.5 MPa.
As a further improvement of the present invention, the radius of curvature of the surface of the chuck contacting the part is the same as the radius of curvature of the outer surface of the part.
As a further improvement of the invention, the thickness of the single-layer film formed after spraying is 10-16 mu m, the number of spraying layers is 2-3, and the total thickness of the film is less than 50 mu m.
According to another aspect of the invention, there is provided an internal bore spray coating system for a deep blind hole structural component, for use in said spray coating process, comprising a clamping assembly and a spray coating assembly;
the clamping assembly comprises a chuck and a thread protecting sleeve, the chuck is used for fixing the blind hole end of the deep blind hole structural part, and the thread protecting sleeve is fixed at the opening end; the chuck is communicated with the spindle motor;
the spraying assembly comprises a spray rod, and a feed pipe and an air inlet pipe are arranged on the spray rod; one end of the spray rod is provided with a spray head, the spray head is rotatably arranged at the end part of the spray rod, and the other end of the spray rod is arranged on the spray rod mounting seat; the spray rod mounting seat is fixed on the supporting plate box motor and used for controlling the spray rod to move vertically; the supporting plate box motor is arranged on the ball screw, one end of the ball screw is connected with the support, and the other end of the ball screw is connected with the motor; the motor drives the ball screw to rotate, thereby driving the supporting plate box motor and the spray rod to axially move.
As a further improvement of the invention, the spray head comprises a main atomization hole, auxiliary atomization holes and sector control holes, wherein the main atomization hole is positioned at the center, the auxiliary atomization holes are positioned at two sides of the main atomization hole, and the sector atomization holes are positioned at two sides of the spray head;
the paint is sprayed out from the main atomization holes, and the main atomization holes, the auxiliary atomization holes and the sector control holes are air outlet holes.
In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:
(1) The inner hole spraying method of the deep blind hole structural part adopts a unidirectional spraying mode from inside to outside, and the inner hole spraying method stays for a certain time before each spraying, so that the gas in the blind hole can be ensured to be fully discharged, and the rebound of the air block at the bottom of the blind hole is eliminated. Meanwhile, the air blockage at the bottom of the blind hole is eliminated by adjusting the initial position of the spray gun, the spray angle, the rotation speed and the displacement speed of the part and the spray time parameter, so that the aim of uniform spray is fulfilled.
(2) The inner hole spraying system of the deep blind hole structural part has the advantages of simple structure, accurate positioning and convenient disassembly, and can ensure that the processed product meets the design requirement.
Drawings
FIG. 1 is a schematic diagram of an inner bore spray coating system for a deep blind hole structural component in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a threaded protective sleeve of a bore spraying system for a deep blind hole structural component according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a planar structure of a spray head involved in an inner bore spray coating system for a deep blind hole structural component according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the circular angle opening of the atomizing hole of the nozzle according to the embodiment of the invention.
Like reference numerals denote like technical features throughout the drawings, in particular: 1-part, 2-chuck, 3-screw thread protective sleeve, 4-spray rod, 5-spray rod mount pad, 6-layer board case motor, 7-spindle motor, 8-support, 9-inlet pipe, 10-intake pipe, 11-motor, 12-ball screw.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
The invention provides an inner hole spraying process of a deep blind hole structural part, which is particularly suitable for deep blind hole parts with large length-diameter ratio and gradually reduced cross sections of blind hole ends. The specific spraying process comprises the following steps:
(1) Pretreatment of the paint;
for specific types of the paint, emulsion paint or the like can be selected according to actual needs, in one specific embodiment of the invention, shellac paint is adopted for spraying, specifically, the paint is stirred uniformly and diluted (the concentration of the diluted paint is 25% -30%), a copper wire mesh with 200-300 meshes is adopted for filtering, and the paint is added into a charging bucket.
The anti-rust coating can play a role in rust prevention on one hand and can separate parts from fillers in the parts on the other hand.
(2) Synchronously with the step (1), the air pressure and the spray head angle in the spraying system air path are required to be checked and adjusted, so that the spray head inclines towards the blind hole end, and the liquid sprayed by the spray head is ensured to be fully atomized;
preferably, the pressure of the compressed air in the spray gun is 0.3-0.5 MPa. The angle between the spray nozzle and the spray boom is specifically adjusted according to the inclination angle of the conical surface of the blind hole end, and in the embodiment of the invention, the angle is preferably 120-150 degrees.
(3) Installing a thread protecting sleeve at one axial end (open end) of the part, and installing the other axial end (blind end) of the thread protecting sleeve into a chuck fixture of the coating equipment; the cross section area of the blind hole end is gradually smaller;
the external screw thread of screw thread protective sheath and the internal screw thread phase-match of waiting to spray the piece, with screw thread protective sheath installation to waiting to spray the open end of piece, can avoid the coating cloud adhesion that splashes on the internal screw thread, reduced subsequent processing procedure.
The blind hole end (end with gradually reduced cross section) of the part is clamped on a clamping head of the spraying equipment, the surface curvature radius of the chuck contacting the part is the same as that of the outer surface of the part, the contact area of the chuck clamp and the part contact cylinder body is adjusted, and the contact area of the chuck clamp and the part is not smaller than (100 multiplied by 30) mm 2 Therefore, the workpiece to be sprayed can be ensured to be stably clamped in the chuck clamp, and stable support is provided for the subsequent spraying process.
Preferably, the chuck holder is made of soft materials such as nylon, brass or copper.
(4) The part is controlled to rotate at a rotating speed alpha under the rotation of the chuck, the spray head of the spray gun is placed at an initial position, and the spray gun is opened, so that the spray gun longitudinally moves from the blind hole end to the opening end to a stroke end at a displacement speed v, and one-time spraying is completed; and (3) spraying at least once according to the thickness of the coating, returning the spray head to the initial position when spraying is carried out for the next time, and staying at the initial position for a set time when spraying is carried out each time until the spraying is finished.
Specifically, when spraying for the first time, the spray gun is opened and stays for a first time at the initial position, unidirectional spraying is carried out from inside to outside, spraying is stopped and returned immediately after reaching the stroke end, and when spraying for the second time, the spray gun is opened and stays for a second time at the initial position, and repeated spraying is carried out for a plurality of times according to the thickness of the coating. The third spraying is performed, the residence time at the initial position is the first time, and the fourth spraying is performed, the residence time at the initial position is the second time, and the cycle is performed. After the spraying is finished, the spray gun moves to a reference position (the central axial position of the chuck), the chuck automatically stops running after the part rotates for a third time, and the automatic spraying of the blind holes is finished. The coating is fully leveled in the part, and uniform and sagging-free coating is ensured.
When the spraying gun is opened for spraying, compressed air is fed from the air supply port, gas is introduced into the spraying gun through the pipeline, high-pressure gas is generated in the flow path of the spraying gun, the coating is fed from the feeding port, and atomized paint mist is formed under the driving of the gas flow of the high-pressure gas through the feeding pipeline.
Specifically, the first time is preferably 3 s-5 s, so as to exhaust the air in the blind hole; the second time is preferably 4s to 6s, in order to discharge the air again; the third time is preferably 30-60 s, and the purpose is to ensure that the coating is sufficiently leveled in the part and uniform and free from sagging.
In a preferred embodiment of the invention, the length of the part is 700mm to 800mm and the diameter of the open end is 90mm to 100mm. The initial position is specifically: the initial position is a linear distance of 50-120 mm from the top end of the blind hole, 25-40 mm from the axis of the chuck, and the stroke end is a distance of 50-120 mm from the end face of the thread protecting sleeve, 25-40 mm from the axis of the chuck; and the lance is located directly below the chuck central axis. According to the invention, by adjusting the distance between the spray rod and the axis of the chuck and adjusting the angles of the spray head and the spray rod, both the cylindrical section and the conical section of the deep blind hole part can be sprayed.
The motion travel is specifically as follows: the spray gun moves from a position (initial position) with a linear distance of 50-120 mm from the top end of the blind hole to a position (stroke end) with a distance of 50-120 mm from the front end of the thread protecting sleeve.
Preferably, the rotating speed alpha of the part is 300-800 r/min, and the displacement speed v of the spray head is 6-10 m/min.
Preferably, the thickness of the single-layer film formed after spraying is 10-16 mu m, the number of spraying layers is 2-3, and the total thickness of the film is less than 50 mu m.
The inner hole spraying method of the deep blind hole structural part adopts a unidirectional spraying mode from inside to outside, and the inner hole spraying method stays for a certain time before each spraying, so that the gas in the blind hole can be ensured to be fully discharged, the rebound of the air block at the bottom of the blind hole is eliminated, and the uniformity of the coating is realized. Meanwhile, the air blockage at the bottom of the blind hole is eliminated by adjusting the initial position of the spray gun, the spray angle, the rotation speed and the displacement speed of the part and the spray time parameter, so that the aim of uniform spray is fulfilled.
The invention also provides an inner hole spraying system suitable for the deep blind hole structural part, as shown in fig. 1, the spraying system comprises a clamping assembly and a spraying assembly, wherein the clamping assembly comprises a chuck 2 and a thread protecting sleeve 3, the chuck 2 is used for fixing the blind hole end of the deep blind hole structural part, the thread protecting sleeve 3 is matched with the thread of the open end of the deep blind hole structural part, and is fixed at the open end, so that the thread of the open end can be protected, and paint mist is prevented from adhering to the inner thread. The chuck 2 is communicated with the spindle motor 7, and under the action of the spindle motor 7, the chuck and the deep blind hole structural part are driven to synchronously rotate.
The spraying assembly comprises a spray rod 4, and a feed pipe 9 and an air inlet pipe 10 are arranged on the spray rod 4; the shower nozzle is installed to spray lance 4 one end, and the shower nozzle is rotatably installed in the tip of spray lance, and spray lance 4 other end is installed on spray lance mount pad 5. The spray boom mounting seat 5 is fixed on a pallet box motor 6, and the pallet box motor 6 is used for controlling the spray boom to move vertically (in the x-axis direction as shown in the figure); meanwhile, the supporting plate box motor 6 is arranged on the ball screw 12, one end of the ball screw 12 is connected with the support 8, and the other end of the ball screw 12 is connected with the motor 11. The motor 11 drives the ball screw to rotate, and drives the pallet box motor and the spray rod to axially move (in the Z-axis direction as shown in the figure). The drawings of the invention are only schematic, and the specific structure can be designed according to actual conditions, so long as the spray rod can move vertically and axially.
In one embodiment of the present invention, a spray head structure as shown in fig. 3 and 4 is provided, which includes a main atomization hole a, an auxiliary atomization hole b and a fan control hole c, wherein the main atomization hole is a central atomization hole, the auxiliary atomization holes are located at the central position, the auxiliary atomization holes are located at two sides of the main atomization hole, and the fan atomization holes are located at two sides of the spray head. Wherein the coating is sprayed out from the main atomization holes, and the main atomization holes, the auxiliary atomization holes and the sector control holes are air outlet holes. The main atomization hole generates the suction effect of gas, compressed air is guided to form a negative pressure area at the front end of the spray head to separate out liquid and atomize, and then atomized paint is sprayed to the surface of the spray material through the air flow of the main atomization hole. The auxiliary atomization holes are used for preventing paint from remaining on the spray head through air flow and cleaning the spray head. The fan atomizing hole is used for controlling the shape of the spray pattern of the spray gun, and the pressure and flow of the fan atomizing hole are mainly changed.
Preferably, the main atomizing hole and the auxiliary atomizing hole are circular or elliptical in shape, and have a fillet opening in the range of (0 to 30) °.
In one embodiment of the present invention shown in the drawings, as shown in fig. 1 and 2, one end of the deep blind hole structural component with large length-diameter ratio is an open end (cylindrical shape), the other end is a blind hole end (conical shape), and the blind hole end is clamped in a chuck of the spraying equipment. And according to the inner hole size of the deep blind hole structural part with the large length-diameter ratio, an automatic paint spraying program is compiled or a stored program is called out for spraying. The spray gun is placed at an initial position, wherein the initial position is a position with a linear distance of 50-120 mm from the top end of the blind hole on the Z axis; and the X-axis is 25 mm-40 mm away from the central axis of the chuck. The motion travel of the spray gun on the Z axis is the depth length of a part cavity, namely: the spray gun moves from a position 50mm to 120mm away from the bottom end of the cavity to a position 50mm to 120mm away from the front of the protective sleeve; the displacement speed of the spray gun is 6 m/min-10 m/min; high aspect ratio deep blind hole structural part rotational speed: the rotation speed of the deep blind hole structural part with the large length-diameter ratio is 400 r/min-800 r/min.
After each paint is sprayed, the spray gun firstly sprays in Kong Penqi s-5 s inwards at the initial position of the Z axis, then sprays unidirectionally from outside to inside, stops spraying after reaching the end of the stroke, returns immediately, and sprays the next paint after staying for 4 s-6 s at the initial position of the Z axis. The process is repeated for 2 to 3 times, after the last paint is sprayed, the spray gun is moved to the initial position of the X-axis, and after the cavity rotates for 30 to 60 seconds, the equipment automatically stops running to finish.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The inner hole spraying process of the deep blind hole structural part is characterized by comprising the following steps of:
s1, pretreatment of a coating;
s2: synchronously with the step S1, checking and adjusting the air pressure and the spray head angle in the spraying system gas circuit to enable the spray head to incline towards the blind hole end, and ensuring that the liquid sprayed by the spray head is fully atomized;
s3: installing a thread protection sleeve at the opening end of the part, and installing the blind hole end of the part into a chuck of coating equipment, wherein the sectional area of the blind hole end is gradually smaller;
s4: the part is controlled to rotate at a rotating speed alpha under the rotation of the chuck, the spray gun nozzle is placed at an initial position, and the spray gun is opened, so that the spray gun longitudinally moves from the blind hole end to the opening end to a stroke end at a displacement speed v, and one-time spraying is completed; spraying at least once according to the thickness of the coating, returning the spray head to the initial position when spraying is carried out for the next time, and staying at the initial position for a set time when spraying is carried out for each time until the spraying is finished;
the initial position is a linear distance of 50-120 mm from the top end of the blind hole, and 25-40 mm from the axis of the chuck; the stroke end point is 50 mm-120 mm away from the end face of the thread protecting sleeve, and 25 mm-40 mm away from the axis of the chuck.
2. The process for spraying the inner hole of the deep blind hole structural part according to claim 1, wherein in the step S4, the spray head stays at the initial position for a first time, then spraying is performed in a one-way from inside to outside, spraying is stopped after reaching the stroke end, the spray head returns immediately, stays at the initial position for a second time, and the spray head repeats according to the stay time in the subsequent spray.
3. The inner hole spraying process of the deep blind hole structural part according to claim 2, wherein the first time is 3 s-5 s, and the second time is 4 s-6 s.
4. A process for spraying an inner hole of a deep blind hole structural part according to any one of claims 1 to 3, wherein after the spraying is finished, the chuck automatically stops running after the part rotates for a third time; the third time is 30 s-60 s.
5. The inner hole spraying process of the deep blind hole structural part according to any one of claims 1 to 3, wherein the rotating speed alpha is 300-800 r/min, and the displacement speed v of the spraying gun is 6-10 m/min; the pressure of the compressed air in the spray gun is 0.3-0.5 MPa.
6. A process for the internal bore spraying of a deep blind hole structural component according to any of claims 1 to 3, characterised in that the radius of curvature of the surface of the chuck contacting the component is the same as the radius of curvature of the external surface of the component.
7. The inner hole spraying process of the deep blind hole structural part according to any one of claims 1 to 3, wherein the thickness of a single-layer film formed after spraying is 10 to 16 μm, the number of spraying layers is 2 to 3, and the total thickness of the film is less than 50 μm.
8. An inner hole spraying system of a deep blind hole structural part, which is applied to the spraying process of any one of claims 1 to 7, and is characterized by comprising a clamping assembly and a spraying assembly;
the clamping assembly comprises a chuck and a thread protecting sleeve, the chuck is used for fixing the blind hole end of the deep blind hole structural part, and the thread protecting sleeve is fixed at the opening end; the chuck is communicated with the spindle motor;
the spraying assembly comprises a spray rod, and a feed pipe and an air inlet pipe are arranged on the spray rod; one end of the spray rod is provided with a spray head, the spray head is rotatably arranged at the end part of the spray rod, and the other end of the spray rod is arranged on the spray rod mounting seat; the spray rod mounting seat is fixed on the supporting plate box motor and used for controlling the spray rod to move vertically; the supporting plate box motor is arranged on the ball screw, one end of the ball screw is connected with the support, and the other end of the ball screw is connected with the motor; the motor drives the ball screw to rotate, thereby driving the supporting plate box motor and the spray rod to axially move.
9. The interior bore spray coating system of a deep blind hole structural component according to claim 8, wherein the spray head comprises a main atomization hole, an auxiliary atomization hole and sector control holes, the main atomization hole is located in a central position, the auxiliary atomization holes are located on two sides of the main atomization hole, and the sector atomization holes are located on two sides of the spray head;
the paint is sprayed out from the main atomization holes, and the main atomization holes, the auxiliary atomization holes and the sector control holes are air outlet holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211172736.8A CN115502074B (en) | 2022-09-26 | 2022-09-26 | Inner hole spraying process and system for deep blind hole structural part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211172736.8A CN115502074B (en) | 2022-09-26 | 2022-09-26 | Inner hole spraying process and system for deep blind hole structural part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115502074A CN115502074A (en) | 2022-12-23 |
| CN115502074B true CN115502074B (en) | 2023-06-02 |
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| CN202211172736.8A Active CN115502074B (en) | 2022-09-26 | 2022-09-26 | Inner hole spraying process and system for deep blind hole structural part |
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Citations (2)
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| JPH0995718A (en) * | 1995-09-29 | 1997-04-08 | Kawasaki Steel Corp | Device for working iron tapping runner |
| JP2004283653A (en) * | 2003-03-19 | 2004-10-14 | Toyoda Spinning & Weaving Co Ltd | Coating apparatus and spray gun |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10016511B4 (en) * | 1999-10-15 | 2006-05-18 | Mfz Antriebe Gmbh & Co. Kg | Coating system for pipes and channels with recessed rotating distributor and easy-to-clean nozzle |
| JP4437272B2 (en) * | 2002-08-30 | 2010-03-24 | ノードソン株式会社 | How to spray liquid |
| CN103586184B (en) * | 2013-11-12 | 2019-06-11 | 哈尔滨东安发动机（集团）有限公司 | A kind of inner surface method for paint spraying of the first static-unbalance of control pipe axis |
| CN105736901A (en) * | 2014-12-10 | 2016-07-06 | 江苏图博可特曙光涂层有限公司 | Oil pipeline with improved structure |
| CN105618303B (en) * | 2016-03-28 | 2017-10-24 | 吴忠仪表有限责任公司 | Core spraying frock |
| CN207056839U (en) * | 2017-06-21 | 2018-03-02 | 东莞市飞吻涂装设备科技有限公司 | A kind of fan nozzle |
| CN107400847B (en) * | 2017-09-07 | 2023-05-26 | 中国人民解放军陆军装甲兵学院 | Remanufacturing system and process for waste cylinder assembly of aviation piston engine |
| CN210304261U (en) * | 2019-05-29 | 2020-04-14 | 江苏吉鑫风能科技股份有限公司 | Spraying construction device for long and thin inner hole workpiece |
| CN110965006A (en) * | 2019-12-30 | 2020-04-07 | 广东省新材料研究所 | Spray gun for thermally spraying inner hole, inner hole thermal spraying method and tungsten carbide coating |
| CN111570118A (en) * | 2020-05-28 | 2020-08-25 | 宁波立成涂装技术有限公司 | Spray gun for deep-hole container internal coating |
| CN114713485A (en) * | 2021-01-05 | 2022-07-08 | 博尔豪夫(中国)紧固件有限公司 | Corrosion prevention solution method for blind hole product |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0995718A (en) * | 1995-09-29 | 1997-04-08 | Kawasaki Steel Corp | Device for working iron tapping runner |
| JP2004283653A (en) * | 2003-03-19 | 2004-10-14 | Toyoda Spinning & Weaving Co Ltd | Coating apparatus and spray gun |
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| CN115502074A (en) | 2022-12-23 |
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