CN112191023A - Industrial slotted screen and laser processing technology thereof - Google Patents
Industrial slotted screen and laser processing technology thereof Download PDFInfo
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- CN112191023A CN112191023A CN202011206076.1A CN202011206076A CN112191023A CN 112191023 A CN112191023 A CN 112191023A CN 202011206076 A CN202011206076 A CN 202011206076A CN 112191023 A CN112191023 A CN 112191023A
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- Prior art keywords
- screen
- shaped
- bar
- welding
- wedge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/10—Filter screens essentially made of metal
- B01D39/12—Filter screens essentially made of metal of wire gauze; of knitted wire; of expanded metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/04—Stationary flat screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4618—Manufacturing of screening surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to an industrial slotted screen and a laser processing technology thereof, which can be used in the fields of petroleum and petrochemical industry, environmental protection, water treatment, paper making, grain processing and the like, and are suitable for the processes of filtration, gas-solid, liquid-solid, solid-solid separation and the like; comprises a screen bar and a support bar; the cross sections of the screen bars are triangular, trapezoidal, Y-shaped and L-shaped; the screen bars are provided with wedge-shaped tail structures; the section of the support rod is L-shaped or T-shaped; the thickened part of the head part of the supporting rod is provided with a groove for inserting the wedge-shaped tail part of the screen bar; by adopting the process used by the invention, the screen bars and the supporting rods are welded through laser irradiation, so that the gap of the seam net can be reduced, the tensile stress between the screen bars and the supporting rods can be improved, and the use of a complex tool clamp can be avoided, thereby reducing the production cost.
Description
Technical Field
The invention relates to an industrial slotted screen and a laser processing technology thereof, which can be used in the fields of petroleum and petrochemical industry, environmental protection, water treatment, paper making, grain processing and the like, and are suitable for the processes of filtration, gas-solid, liquid-solid, solid-solid separation and the like.
Background
A slotted screen, also called Johnson net, is developed successfully from the last 90 years by Johnson company of Australia and Trislot company of Belgium, and is formed by welding a triangular wire with a V-shaped section and a supporting rod with a square section forming 90 degrees with the axis of the triangular wire through resistance welding, and because the resistance welding process is adopted, the welding part of the supporting rod and the triangular wire is required to be made into a sharp corner so as to enable the triangular wire and the triangular wire to be uniformly fused, otherwise, the triangular wire can be fused, the welding strength is also limited by the process, and the tensile strength of a welding spot is 1700-2000 newtons by taking No. 93 wires as an example.
Patent numbers: 201010561383.1 discloses a V-shaped industrial filter screen and its laser processing technology, which proposes to use laser to cut the groove for inserting the lower part of the V-shaped wire on the support rod without changing the V-shaped wire, and use laser to irradiate and weld the contact part of the two parts to form the laser welding Johnson screen.
The process has the following disadvantages:
1. due to structure and processing errors, the bottom of the V-shaped wire cannot be completely attached to the groove of the support rod, and the gap error of the slit net is large due to the fact that the V-shaped wire topples;
2. the contact surface of the V-shaped wire and the supporting rod is too small, the tension of a welding spot is difficult to meet the technical requirements during single-side welding, welding leakage and poor welding are easily caused, and in order to meet the tension requirement and ensure safety, double-side welding is required, and the single-point tension of the welding spot can reach 3500N;
3. v type silk and bracing piece can not independently fix a position, must rely on extra frock clamp to the accurate location of V type silk, reuse laser welding, and frock clamp structure is complicated, and the cost is high.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an industrial strip seam screen and a laser processing process thereof aiming at the technical defects.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: comprises a screen bar and a support bar; the cross sections of the screen bars are triangular, trapezoidal, Y-shaped and L-shaped; the screen bars are provided with wedge-shaped tail structures; the section of the support rod is L-shaped or T-shaped; the thickened part of the head part of the supporting rod is provided with a groove for inserting the wedge-shaped tail part of the screen bar.
Further optimizing the technical scheme, the laser processing technology comprises the following steps:
(1) a plurality of said screen bars are arranged in parallel; the wedge-shaped tail part of the screen bar is vertically inserted into the supporting rods which are arranged in parallel; the upper surface of the screen bar forms a bar seam net structure; the long axis of the screen bar is vertical to the long axis of the support rod;
(2) the welding position aligned with the laser head is the fillet weld position of the support rod; namely the contact part of the wedge-shaped tail part of the screen bar and the groove at the bottom of the support rod;
(3) when the laser head is used for welding; according to the welding strength requirement; the contact part of the screen bar and the support bar can be welded on one side or both sides; wire welding can be carried out or not during welding;
(4) the size of the screen slot is used as the most important parameter of the slotted screen; the width of the upper surface of the screen bar and the distance between the grooves of the supporting rods are determined together.
Compared with the prior art, the invention has the following advantages: by adopting the process used by the invention, the screen bars and the supporting rods are welded by laser head irradiation, so that the gap of the seam net can be reduced, the tensile stress between the screen bars and the supporting rods can be improved, and the use of a complex tool clamp can be avoided, thereby reducing the production cost.
Drawings
FIG. 1 is a basic form of a laser welded wedge slotted screen for an industrial slotted screen and its laser machining process.
FIG. 2 is several cross-sectional shapes of a wedge-shaped screen bar for an industrial slotted screen and its laser machining process.
FIG. 3 is a flat laser welded wedge slotted screen for an industrial slotted screen and its laser machining process.
FIG. 4 is an internal mesh laser welded wedge slotted screen of an industrial slotted screen and laser machining process thereof.
FIG. 5 is an industrial slotted screen and its laser machined outer mesh laser welded wedge slotted screen.
FIG. 6 is an industrial slotted screen and a flat laser welded wedge slotted screen embodiment of the laser machining process thereof.
Figure 7 is a cylindrical laser welded wedge slotted screen embodiment of an industrial slotted screen and its laser machining process.
FIG. 8 is an industrial slotted screen and laser machining process thereof FIG. 8 is a cylindrical industrial slotted screen embodiment.
In the figure: 1. screen bars; 2. a support bar; 3. and (6) a laser head.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In order to verify the influence of the laser irradiation angle on the welding strength, a triangular wire with the specification of 93 and an L-shaped support rod with the specification of 12 x 3 are selected, laser welding experiments are carried out at different incidence angles, and the experimental scheme is shown in FIG. 3;
laser welding a No. 93 triangular wire and an L-shaped support rod with the specification of 12 x 3 at different incidence angles, and performing a single-point tension test on a welded welding spot, wherein the test result is shown in a table 1;
TABLE 1
| Angle of incidence | 45° | 60° | 85° |
| Single point pull (ox) | 3180 | 3590 | 4730 |
From table 1, it can be known that the larger the laser incident angle is, the higher the welding strength is, the single-point tension of single-side welding during welding at the incident angle of 60 degrees reaches over 3500N, and the welding strength requirement can be met, and the actual engineering application can adopt single-side welding at the incident angle of 75-85 degrees; further experiments prove that when the cross sections of the screen bars are trapezoidal, Y-shaped, T-shaped and L-shaped, the welding strength is higher than that of the triangular cross section; in the application occasions with high welding strength, double-sided welding can also be adopted; preferably, when the contact points are welded by laser, the welding is firm, and a gas shielded wire filling welding process can be adopted during the laser welding; the size of the gap of the industrial slotted screen is determined by two parameters of the width of the upper plane of the screen bar and the slotting distance of the support rod;
the industrial slotted screen can be made into various forms such as a flat plate type screen shown in figure 4, an arc screen, a cylindrical screen and the like according to use requirements, the screen surface in the cylindrical form can be made into an inner mesh surface cylindrical screen shown in figure 5, and also can be made into an outer mesh surface cylindrical screen shown in figure 6, so that the requirements of various working conditions are met;
FIG. 7 is a plane type industrial slotted screen, in which the screen bars are laid on the surface of a platform, the support bars are pressed in one by one at a certain interval, and are welded and fixed locally, and then the contact parts of the support bars and the support bars are spot-welded or sweep-welded by a laser welding head;
FIG. 8 is a schematic view of a cylindrical industrial slotted screen, in which the circular support rods are fixed at a certain distance, the screen bars are pressed into the slots of the support plate one by one, and the screen bars are fixed by spot welding, fixed by workpiece, fixed by laser head, rotated by laser head (or fixed by laser head, rotated by workpiece), spot welding or sweep welding the contact parts of the two
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (2)
1. An industrial slotted screen, which is characterized in that: comprises a screen bar 1 and a support bar 2; the cross section of the screen bar 1 is triangular, trapezoidal, Y-shaped or L-shaped; the screen bars 1 are provided with wedge-shaped tail structures; the section of the support rod 2 is L-shaped or T-shaped; the thickened part of the head part of the support rod 2 is provided with a groove for inserting the wedge-shaped tail part of the screen bar 1.
2. The laser processing technology of industrial slotted screen according to claim 1, characterized in that: the method comprises the following steps:
(1) a plurality of the screen bars 1 are arranged in parallel; the wedge-shaped tail part of the screen bar 1 is vertically inserted into the supporting rods 2 which are arranged in parallel; a strip seam net structure is formed on the upper surface of the screen bar 1; the long axis of the screen bar 1 is vertical to the long axis of the support rod 2;
(2) the welding position aligned with the laser head 3 is the fillet weld position of the support rod 2; namely the contact part of the wedge-shaped tail part of the screen bar 1 and the groove at the bottom of the support rod 2;
(3) when the laser head 3 is used for welding; according to the welding strength requirement; the contact part of the screen bar 1 and the support bar 2 can be welded on one side or both sides; wire welding can be carried out or not during welding;
(4) the size of the screen slot is used as the most important parameter of the slotted screen; the width of the upper surface of the screen bar 1 and the slotting distance of the support bar 2 are jointly determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011206076.1A CN112191023A (en) | 2020-11-02 | 2020-11-02 | Industrial slotted screen and laser processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011206076.1A CN112191023A (en) | 2020-11-02 | 2020-11-02 | Industrial slotted screen and laser processing technology thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112191023A true CN112191023A (en) | 2021-01-08 |
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ID=74032973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011206076.1A Pending CN112191023A (en) | 2020-11-02 | 2020-11-02 | Industrial slotted screen and laser processing technology thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112191023A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275848A (en) * | 2021-06-22 | 2021-08-20 | 浙江展辉仪器科技有限公司 | Production process of laser welding double-layer sieve |
-
2020
- 2020-11-02 CN CN202011206076.1A patent/CN112191023A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275848A (en) * | 2021-06-22 | 2021-08-20 | 浙江展辉仪器科技有限公司 | Production process of laser welding double-layer sieve |
| CN113275848B (en) * | 2021-06-22 | 2022-09-23 | 浙江展辉仪器科技有限公司 | Production process of laser welding double-layer sieve |
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