CN113909022B - Sand blasting or spraying method for slit workpiece - Google Patents
Sand blasting or spraying method for slit workpiece Download PDFInfo
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- CN113909022B CN113909022B CN202111322788.4A CN202111322788A CN113909022B CN 113909022 B CN113909022 B CN 113909022B CN 202111322788 A CN202111322788 A CN 202111322788A CN 113909022 B CN113909022 B CN 113909022B
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- workpiece
- shielding material
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- shielding
- slit
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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
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
- B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
- B05B12/28—Masking elements, i.e. elements defining uncoated areas on an object to be coated for defining uncoated areas that are not enclosed within coated areas or vice versa, e.g. for defining U-shaped border lines
Abstract
The invention relates to the technical field of machining of mechanical workpieces, and discloses a sand blasting or spraying method for a slit workpiece, which solves the technical problems of two traditional methods of high-temperature adhesive tape shielding and iron sheet shielding and comprises the following steps: step S1, selecting shielding materials; step S2, forming the shielding material into a V shape; step S3, uniformly inserting the formed shielding material into the workpiece gap; step S4, providing a support structure between the parts B and C of the masking material; step S5, starting sand blasting or spraying operation; and step S6, removing the supporting structure, removing the shielding material and completing the sand blasting or spraying operation. According to the technical scheme, the V-shaped shielding material with the suspension wings is designed to shield gaps of the workpiece, the V-shaped shielding material is convenient to mount and dismount, the efficiency is high, the quality is good, and the purpose of optimizing the sand blasting or spraying process of the workpiece is achieved.
Description
Technical Field
The invention relates to the technical field of machining of mechanical workpieces, in particular to a sand blasting or spraying method for a slit workpiece.
Background
Power system components are increasingly protected from their surfaces by thermal spray techniques. In coal-fired power plants, hydraulic power plants and gas-turbine power plants, in order to prolong the service life of equipment and prolong the overhaul period of a unit, thermal spraying technology is often adopted to protect the surfaces of components subjected to corrosion, abrasion, water erosion, cavitation and the like. In the process of thermal spraying, a sand blasting link is particularly important, because of the control of a spraying area, one part is usually sprayed only on an area with serious abrasion, an area which is not sprayed is required to be shielded, the pollution of a coated layer is avoided, and because a matching area relates to the matching size requirement, the shielding of the area is particularly important, so that the safe and effective shielding of the area which is not sprayed is very important.
At present, two methods, namely high-temperature adhesive tape shielding and traditional iron sheet shielding, are commonly adopted for ultra-narrow gap shielding in the sand blasting and spraying processes.
The high-temperature adhesive tape shielding is to adopt the high-temperature adhesive tape to carry out pasting protection on an area which is not sprayed, in the implementation process of the method, a large amount of high-temperature adhesive tapes are needed to carry out multi-layer pasting, and because the pasting is carried out on the ultra-narrow gap, and part of the positions can not be pasted, the adhesive tapes at the positions are easily damaged in the sand blasting process, and the shielding protection effect is seriously influenced. Meanwhile, the high-temperature adhesive tape shielding method has high labor intensity and long construction period.
The traditional iron sheet shielding method is that an iron sheet is directly inserted into a gap, a pair of iron sheet scissors is used for cutting the redundant part, and the height of the reserved part is shielded. Compared with the shielding mode of a high-temperature adhesive tape, the method has stable shielding effect and can effectively shield sand grains or powder. However, after the spraying is finished, because the iron sheet still has a gap in the gap, sand particles impacted at high speed in the sand blasting process are clamped in the gap between the iron sheet and the workpiece, so that the iron sheet is very difficult to take out after the work is finished, and certain quality hidden danger exists.
Further optimization of current masking methods is needed to achieve effective, safe masking of ultra-narrow gaps in components.
Disclosure of Invention
Aiming at the technical problems of two traditional methods of high-temperature adhesive tape shielding and iron sheet shielding in the background technology, the invention designs a V-shaped shielding material with a suspension wing to shield the gap of a workpiece, and the V-shaped shielding material is convenient to mount and dismount, high in efficiency and good in quality, so as to achieve the purpose of optimizing the sand blasting or spraying process of the workpiece.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of sandblasting or spraying a slit workpiece comprising the steps of:
step S1, selecting shielding materials;
step S2, forming the shielding material into a V shape, wherein one side of the shielding material is provided with a part A of a suspension wing, and the size of an opening of the V-shaped shielding material is equal to the width of the workpiece gap minus twice the thickness of the shielding material;
step S3, uniformly inserting the molded shielding material into the gap of the workpiece, and detachably attaching and fixing the redundant part A and the position of the workpiece needing to be protected;
step S4, respectively forming a part B and a part C on two sides of the opening of the V-shaped shielding material, and arranging a supporting structure between the part B and the part C so that the part B and the part C can be attached to the inner surface of the gap of the workpiece;
step S5, starting sand blasting or spraying operation;
and step S6, removing the supporting structure, removing the shielding material and completing the sand blasting or spraying operation.
Through the technical scheme, for example: the upper stop leakage ring to be sprayed on a certain power station needs to be shielded and protected before sand blasting, and as the upper stop leakage ring and the top cover of the power station are assembled into a whole, the overlapping surface of the top cover and the upper stop leakage ring needs to be shielded and protected before sand blasting, and the ultra-narrow gap shielding and protecting device is adopted to shield the upper stop leakage ring and the top cover, and the process is as follows.
Firstly, measuring the width of the gap by a caliper, displaying the width of the gap at the position to be 4mm by a measuring result, taking an iron sheet with the thickness of 0.4mm, folding the iron sheet into a V shape according to requirements, wherein the size of a V-shaped opening is 3.2mm, inserting the iron sheet into the gap with the depth of 25mm, tightly adsorbing the iron sheet on the surface of a top cover in eight directions by adopting magnetic buttons, correspondingly filling a proper support structure such as plasticine into the V-shaped opening, reinforcing the joint degree of the iron sheet and a leakage stopping ring, carrying out sand blasting and spraying after the reinforcement is finished, detaching the magnetic buttons after the spraying is finished, clamping the iron sheet by using pliers, simultaneously, recovering and reusing the used iron sheet after taking out the iron sheet, carrying out gap shielding protection of other sizes by adjusting the size of the V-shaped opening, and using the magnetic buttons for other work requirements, saving the cost, and greatly shortening the time of the whole shielding time of the warm protective adhesive tape method with higher temperature, compared with the traditional iron sheet protection, the iron sheet after spraying is taken out, so that the risk of washing a large amount of small sand grains between the iron sheet and a workpiece is avoided, and the iron sheet is very convenient and quick to take out in a subsequent process.
The invention is further configured to: the shielding material is a plastically deformable metal material, and the thickness of the shielding material is 0.2-2 mm.
Through the technical scheme, the adopted shielding materials have different thicknesses aiming at the workpiece gaps with different widths, and the shielding materials with the thicknesses of 0.2-2mm are mainly adopted for example.
The invention is further configured to: the shielding material is made of iron sheet.
The invention is further configured to: the shielding material is made of alloy skin.
By the technical scheme, the shielding material can be made of iron sheet or alloy skin or other non-metallic materials to meet the shielding requirement.
The invention is further configured to: the supporting structure is configured to be plasticine, the protected area is evenly divided into N sections, and plasticine is stuffed between the part B and the part C at each section point so as to fix the part C iron sheet to be tightly attached to the surface of the workpiece.
Through above-mentioned technical scheme, support through the plasticine, the plasticine has strong viscidity and can be full of the space between B part and the C part, and the support effect is good is difficult for droing.
The invention is further configured to: the support structure is configured as a trapezoidal block.
Through above-mentioned technical scheme, trapezoidal shape is invertedly inserted between B part and C part, plays the supporting role, and utilizes the extrusion force to maintain the installation stable.
The invention is further configured to: and a magnetic buckle is arranged between the part A of the shielding material and the position of the workpiece needing to be protected, and the shielding material and the workpiece are firmly adsorbed and fixed by the magnetic buckle.
Through above-mentioned technical scheme, through setting up magnetic force and detaining, can convenient installation and dismantle V type and shield the material, convenient and fast.
The invention is further configured to: the magnetic button is annular or is a magnetic button of a single arc-shaped unit.
Through above-mentioned technical scheme, annular magnetic force is detained what be directed against is the annular gap on the annular work piece, also can adopt the magnetic force of single arc unit to detain, convenient dismantlement more.
The invention is further configured to: the shielding material can be formed into a W shape or a wave shape with more bending parts, so that the mounting stability of the supporting structure is improved.
Through above-mentioned technical scheme, because the shielding material of W style of calligraphy or wave type inside has the position of buckling, has more faying surfaces to the installation of plasticine, improves bearing structure's the firm degree of installation.
The invention is further configured to: the continuous gaps of a plurality of groups of workpieces can be continuously shielded by W-shaped or wavy shielding materials.
Through the technical scheme, the shielding efficiency of the workpiece gap is improved, and the integrated continuous shielding material has a better shielding effect and does not have a shielding gap.
In conclusion, the invention has the following beneficial effects:
the V-shaped shielding material with the suspension wings shields gaps of the workpiece, and the V-shaped shielding material is convenient to mount and dismount, high in efficiency and good in quality, so that the purpose of optimizing the sand blasting or spraying process of the workpiece is achieved.
Drawings
FIG. 1 is a schematic view of a workpiece having a gap;
FIG. 2 is a diagram of a workpiece with masking material installed in the gap;
FIG. 3 is a schematic view of a W-shaped masking material installed in a gap in a workpiece structure;
FIG. 4 is a schematic illustration of a wave-type masking material installed in a gap in a workpiece structure;
FIG. 5 is a schematic diagram of a portable profiling apparatus;
fig. 6 is a partial structural view of fig. 5.
Reference numerals: 1. a suspension wing; 2. a magnetic button; 01. a base; 02. a top frame; 31. side pressing plates; 32. a first push cylinder; 41. a second push cylinder; 42. pressing a cutter; 5. a hollow air bag column; 6. a main air pipe.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
Example 1
A method of blasting or spraying a slit workpiece, as shown in fig. 1 and 2, comprising the steps of:
step S1, firstly, measuring the width of the gap with a caliper, and selecting a shielding material, wherein the width of the gap at the position is 4mm, and the shielding material is a plastically deformable metal material, such as an iron sheet for the shielding material or an alloy skin for the shielding material, and the thickness of the shielding material is 0.4 mm.
Step S2, forming the shielding material into a V shape, wherein one side of the shielding material is provided with a part A of the suspension wing 1, and the size of the opening of the V-shaped shielding material is equal to the width of the workpiece gap minus two times of the thickness of the shielding material; such as: the steel pipe is folded into a V shape according to requirements, the width of the V-shaped opening is 3.2mm, the width of the gap is 4mm minus 0.4mm of the thickness of the double iron sheet, and the vertical height of the V-shaped opening is 25mm, which is the same as the depth of the gap.
And step S3, uniformly inserting the molded shielding material into the gaps of the workpiece, and detachably attaching and fixing the redundant part A and the position needing to be protected to uniformly divide the protected area into 8 sections.
A magnetic buckle 2 is arranged between the part A of the shielding material and the position of the workpiece needing to be protected, and the shielding material and the workpiece are firmly adsorbed and fixed by the magnetic buckle 2. The magnetic buckle 2 is a ring-shaped or single arc-shaped unit magnetic buckle 2. When the magnetic button 2 of the annular unit is adopted, the iron sheet is tightly adsorbed on the surface of the top cover in eight directions by adopting magnetic button.
And step S4, respectively forming a part B and a part C on two sides of the V-shaped shielding material opening, and arranging a supporting structure between the part B and the part C of the shielding material so that the part B and the part C can be attached to the inner surface of the workpiece gap. The support structure is configured as plasticine, and each section point is stuffed with the plasticine between the B and the C so as to fix the C part of the iron sheet to be tightly attached to the surface of the workpiece.
Step S5, the blasting or spraying operation is started.
And step S6, removing the supporting structure, removing the shielding material and completing the sand blasting or spraying operation.
Example 2
The present embodiment is different from the masking method of embodiment 1 in that the support structure is configured as a trapezoidal block. The trapezoidal block can be made of metal, cork, rubber, plastic and the like, and the C part of the iron sheet is tightly attached to the surface of the workpiece by the trapezoidal block.
Example 3
The difference between this embodiment and the masking method of embodiment 1 is that, referring to fig. 3, the masking material is designed to be molded into a W-shape.
Example 4
The difference between this embodiment and the shielding method of embodiment 1 is that, referring to fig. 4, the shielding material is designed to be formed into a wave shape with more bending portions, so as to increase the installation stability of the supporting structure. And aiming at continuous multiple groups of workpiece gaps, the gaps can be continuously shielded through the wave shape of the shielding material.
Example 5
The present embodiment is different from the masking method of embodiment 1 in that, referring to fig. 5 and 6, a masking material is molded using a portable molding device, wherein the portable molding device includes:
a susceptor 01 serving as a substrate;
a top frame 02 which is in an inverted U shape and fixed to the upper seating surface of the base 01; and the number of the first and second groups,
and a profiling mechanism which is arranged in a working cavity formed between the base 01 and the top frame 02 and is used for profiling the shielding material.
The die mould mechanism includes: the device comprises side pressing plate units which are symmetrically distributed left and right and a pressing unit which is arranged in the middle of a top frame 02; wherein the side platen unit comprises a side platen 31 and a first ram 32.
One side of the side pressure plate 31 close to the center of the base 01 is hinged with the base 01 through a hinge seat, and the rotating surface is a vertical plane; the first push cylinder 32 is a servo electric cylinder, the cylinder body of the first push cylinder is embedded and fixed in the base 01, and the telescopic rod is upwards hinged to the lower surface of the side pressure plate 31 through a ball hinge joint.
The pressing unit comprises a second pushing cylinder 41 which is arranged in a penetrating manner and fixed on the top frame 02, and a pressing knife 42 is fixed on an expansion rod of the second pushing cylinder 41 downwards through a bolt.
When in use, the shielding base material is placed on the flat side pressing plate 31, and the folding point (the bottom end of the V-shaped tip part) is placed under the pressing knife 42; the second pushing cylinder 41 extends to drive the pressing knife 42 to press down on the base material; at the same time, the first pushing cylinder 32 extends to drive the side pressing plates 31 to rotate, and at the same time, the two side pressing plates 31 are folded to match with the pressing knife 42 to press the V-shaped semi-finished product.
Because the present application needs to shield the gap of the arc-shaped workpiece, as shown in fig. 6, the side pressing plates 31 are provided with a plurality of accommodating grooves along the length direction (extending direction of the dividing line of the two side pressing plates), the accommodating grooves are of an upper opening structure and are internally fixed with elastic hollow air bag columns 5, the hollow air bag columns 5 extend along the width of the side pressing plates 31 and are communicated with the main air pipe 6 through an intermediate air pipe at one end, and the main air pipe 6 is provided with a communicated air source (a pump and a fan); and an adaptive electromagnetic valve is arranged on the middle air pipe to control the on-off of the middle air pipe.
The two side pressing plates 31 are folded with each other to match with the pressing knife 42 to press and mold a V-shaped semi-finished product; air is supplied to each hollow air bag column 5 through a main air pipe 6, and each electromagnetic valve is controlled to control the air input of each hollow air bag column 5, namely the expansion amount of the controller, so that the plurality of hollow air bag columns 5 on the same side form an arc shape which is adaptive to the required arc-shaped gap on the outer surface; at the moment, the left side pressing plate unit and the right side pressing plate unit are matched with each other, so that the semi-finished product can be pressed into a finished product with a radian-matched gap, and other subsequent steps are facilitated.
If the part A of the hanging wing needs to be pressed out, before the processing steps of the V-shaped semi-finished product and the finished product, the guide crease mark is pressed out by the pressing knife 42 of the device, and then the part A of the hanging wing is manually pressed out along the hanging wing after the finished product is inserted into the gap.
In order to improve the convenience of the device, an MCU controller with a touch display panel is configured for the device, and the controller is electrically connected with each electromagnetic valve and the push cylinder; at this time, a relation curve between the radian obtained by verification and the expansion amount of each hollow air bag column 5 can be built in, so that automatic compression control setting can be further performed, and the working efficiency is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A method of sandblasting or spraying a slit workpiece, comprising the steps of:
step S1, selecting shielding materials;
step S2, forming the shielding material into a V shape, wherein one side of the shielding material is provided with a part A of a suspension wing, and the size of an opening of the V-shaped shielding material is equal to the width of the workpiece gap minus twice the thickness of the shielding material;
step S3, uniformly inserting the molded shielding material into the gap of the workpiece, and detachably attaching and fixing the redundant part A and the position of the workpiece needing to be protected;
step S4, respectively forming a part B and a part C on two sides of the opening of the V-shaped shielding material, and arranging a supporting structure between the part B and the part C so that the part B and the part C can be attached to the inner surface of the gap of the workpiece;
step S5, starting sand blasting or spraying operation;
step S6, removing the supporting structure, removing the shielding material and completing the sand blasting or spraying operation;
the shielding material adopts portable die mould device to shielding material shaping, wherein, portable die mould device includes:
a susceptor (01) serving as a substrate;
a top frame (02) which is in an inverted U shape and is fixed on the upper seat surface of the base (01); and (c) a second step of,
the profiling mechanism is arranged in a working cavity formed between the base (01) and the top frame (02) and is used for profiling the shielding material;
the die mould mechanism includes: the lateral pressing plate units are distributed in a bilateral symmetry manner, and the downward pressing units are arranged in the middle of the top frame (02); wherein, the side platen unit comprises a side platen (31) and a first push cylinder (32);
one side of the side pressure plate (31) close to the center of the base (01) is hinged with the base (01) through a hinge seat, and the rotating surface is a vertical plane; the cylinder body of the first push cylinder (32) is embedded and fixed in the base (01), and the telescopic rod is upwards hinged to the lower surface of the side pressing plate (31) through a ball hinge joint;
the pressing unit comprises a second pushing cylinder (41) which penetrates through and is fixed on the top frame (02), and a pressing knife (42) is fixed on an expansion rod of the second pushing cylinder (41) through a bolt and faces downwards.
2. A method of blasting or spraying a slit workpiece as claimed in claim 1, characterized in that: the shielding material is a plastically deformable metal material, and the thickness of the shielding material is 0.2-2 mm.
3. A method of blasting or spraying a slit workpiece as claimed in claim 1 or 2, characterized in that: the shielding material is made of iron sheet or alloy skin.
4. A method of blasting or spraying a slit workpiece as claimed in claim 1, characterized in that: the supporting structure is configured to be plasticine or a trapezoidal block, the protected area is evenly divided into N sections, and the plasticine or the trapezoidal block is inserted between the part B and the part C at each section point so as to fix the part C to be tightly attached to the surface of the workpiece.
5. A method of blasting or spraying a slit workpiece as claimed in claim 1, characterized in that: and a magnetic buckle is arranged between the part A of the shielding material and the position of the workpiece needing to be protected, and the shielding material and the workpiece are firmly adsorbed and fixed by the magnetic buckle.
6. A method of blasting or spraying a slit workpiece as claimed in claim 5, characterised in that: the magnetic button is annular or is a magnetic button of a single arc-shaped unit.
7. A method of blasting or spraying a slit workpiece as claimed in claim 1, characterized in that: the shielding material is formed into a W shape or a wave shape with more bending parts, so that the mounting stability of the supporting structure is improved.
8. A method of blasting or spraying a slit workpiece as claimed in claim 7, characterised in that: and continuously shielding continuous multiple groups of workpiece gaps by W-shaped or wavy shielding materials.
9. A method of blasting or spraying a slit workpiece as claimed in claim 1, characterized in that: the side pressing plate (31) is provided with a plurality of accommodating grooves along the length direction, the accommodating grooves are of an upper opening structure, elastic hollow air bag columns (5) are fixed in the accommodating grooves, the hollow air bag columns (5) extend along the width of the side pressing plate (31) and are communicated with a main air pipe (6) through an intermediate air pipe at one end, and the main air pipe (6) is provided with a communicated air source; and an adaptive electromagnetic valve is arranged on the middle air pipe to control the on-off of the middle air pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111322788.4A CN113909022B (en) | 2021-11-09 | 2021-11-09 | Sand blasting or spraying method for slit workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111322788.4A CN113909022B (en) | 2021-11-09 | 2021-11-09 | Sand blasting or spraying method for slit workpiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113909022A CN113909022A (en) | 2022-01-11 |
| CN113909022B true CN113909022B (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111322788.4A Active CN113909022B (en) | 2021-11-09 | 2021-11-09 | Sand blasting or spraying method for slit workpiece |
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| CN (1) | CN113909022B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4791007A (en) * | 1986-10-28 | 1988-12-13 | Gleason Joseph D | Paint shield method |
| US6315831B1 (en) * | 1999-08-06 | 2001-11-13 | Robert Renetta | Paint guard for use with trim and molding |
| CN2670004Y (en) * | 2003-11-21 | 2005-01-12 | 立伟模具工业有限公司 | Shielding structure for paint spraying device |
| US7854212B2 (en) * | 2005-03-31 | 2010-12-21 | Queiroz Felipe S | Paint shield for roof structure |
| CA2587409C (en) * | 2006-07-24 | 2013-10-29 | Sulzer Metco Ag | A masking system for the masking of a cylinder bore |
| US8651047B1 (en) * | 2009-10-15 | 2014-02-18 | Michaeldavid Uri | Painting system and accessories |
| US11890563B2 (en) * | 2019-02-01 | 2024-02-06 | Walk Industrial, Inc. | Grid cover for filter system |
| CN111266236B (en) * | 2020-04-01 | 2021-03-12 | 邢台职业技术学院 | Leather spraying device |
| KR102188161B1 (en) * | 2020-05-12 | 2020-12-07 | 김소중 | Protection paint mist scattering cage for tower wagon |
| CN213161480U (en) * | 2020-08-26 | 2021-05-11 | 江阴德吉铸造有限公司 | Automobile exterior trimming part spraying support |
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2021
- 2021-11-09 CN CN202111322788.4A patent/CN113909022B/en active Active
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