CN114214544A - Preparation method of multifunctional alloy wire pressing mechanism - Google Patents
Preparation method of multifunctional alloy wire pressing mechanism Download PDFInfo
- Publication number
- CN114214544A CN114214544A CN202111515214.9A CN202111515214A CN114214544A CN 114214544 A CN114214544 A CN 114214544A CN 202111515214 A CN202111515214 A CN 202111515214A CN 114214544 A CN114214544 A CN 114214544A
- Authority
- CN
- China
- Prior art keywords
- pressing mechanism
- wire pressing
- blank
- heating
- multifunctional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Conductive Materials (AREA)
- Forging (AREA)
Abstract
The invention relates to the field of assembly of wires, cables and electrical equipment components, in particular to a preparation method of a multifunctional alloy wire pressing mechanism. The mechanism material comprises the following components in percentage by weight: fe (where gray iron 0.2%, nodular iron 0.28%), Cu: 2.2%, Mg: 0.65%, Mn: 0.22%, Ni: 1.75%, Zn: 1.6%, B2O3：0.5％，SiO2: 2.4%, TiC: 2.5%, Pt: 0.7%, Ti: 0.6%, Pb: 0.65%, and the balance Al. The multifunctional line pressing mechanism prepared by the invention not only has wear resistance and rust resistance, but also has small thermal expansion coefficient and high wear resistanceThe power cord connector has the advantages of being simultaneously suitable for power cords of various specifications, simple to operate, high in working efficiency and capable of effectively reducing production cost.
Description
Technical Field
The invention relates to the field of assembly of wires, cables and electrical equipment components, in particular to a preparation method of a multifunctional alloy wire pressing mechanism.
Background
In the use of electric wire manufacturing and assembly, the finished product electric wire of preparation need be pressed line or wire winding, can install a plurality of electric wires according to production demand or user demand fast through multi-functional wire pressing machine, realizes practicing thrift manufacturing cost, improves production efficiency.
At present, many enterprises still adopt traditional wire pressing equipment to make the formula assembly line wire, this kind of equipment on the one hand work efficiency is low, and the recruitment is great, and this kind of wire pressing equipment function singleness of on the other hand can the line ball just can not wind, restricts the improvement of output, has increased the manufacturing cost of enterprise. Meanwhile, most of wire pressing and winding equipment on the current market adopts cast iron or cast steel equipment, occupies a large area, is easy to rust and cannot ensure the production quality. Therefore, the invention meets the development requirements of enterprises by improving the equipment from the aspects of material and manufacturing process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a multifunctional alloy wire pressing mechanism which is high-temperature resistant, friction resistant, rust resistant and convenient to operate.
The technical scheme is as follows:
in order to solve the technical problem, the invention discloses a preparation method of a multifunctional alloy wire pressing mechanism, which comprises the following components in percentage by weight: fe (wherein gray iron is 0.18-0.3%, nodular iron is 0.22-0.3%, Cu is 1-2.5%, Mg is 0.65-1%, Mn is 0.15-0.25%, Ni is 1.35-2%, Zn is 1.3-2.5%, B2O3：0.45％～0.65％，SiO2: 1.55-2.5%, TiC: 1% -3%, Pt: 0.5-0.75%, Ti: 0.4-0.7%, Pb: 0.35 to 0.65 percent of Al, and the balance of Al.
The preferable weight percentage of each component is as follows: fe (where gray iron 0.25%, nodular iron 0.25%), Cu: 1.65%, Mg: 0.85%, Mn: 0.18%, Ni: 1.55%, Zn: 1.9%, B2O3：0.55％，SiO2: 1.85%, TiC: 2%, Pt: 0.6%, Ti: 0.45%, Pb: 0.45 percent and the balance of Al.
A preparation method of a multifunctional alloy wire pressing mechanism comprises the following manufacturing steps:
(1) casting: uniformly mixing the prepared raw materials of each component, adding the mixture into a melting furnace, heating to raise the temperature for melting, adjusting the internal temperature of the melting furnace to 760-800 ℃ for refining after the raw materials are completely melted, pouring aluminum alloy water into a mold, and finally slowly cooling for 6-8 hours to obtain a wire pressing mechanism blank.
(2) Pre-treating an embryo body: cleaning the blank material of the aluminum alloy mechanism, removing impurities such as oil stain on the surface, heating the aluminum alloy mechanism to 260-300 ℃, preserving heat for 2-4 h, then heating to 580-620 ℃, and continuously preserving heat for 3-6 h.
(3) Pretreatment of a mold: heating the die to 420-450 ℃ in a special die heating furnace, preserving heat for 3-5 h, and continuously spraying a secondary lubricant on the working surface of the die.
(4) Forging and pressing: the preheated and insulated cylindrical aluminum alloy blank is put into a die and forged by a 60 MN-80 MN forging press to prepare a forged blank.
(5) Molding: and (3) carrying out roll forming on the prepared forged blank, continuously heating the blank by using a spray gun in a roller press, carrying out point-by-point connection and plastic deformation through an aluminum alloy material, taking down a wire pressing mechanism, and cooling to room temperature for 6-8 hours.
(5) Grinding and polishing treatment: the method comprises the steps of firstly using an electric fine grinding wheel to perform deburring and grinding on the inner part and the periphery of a line pressing mechanism, then spraying a small amount of lubricating oil on the surface, then using a shutter elastic grinding disc to perform internal and external polishing treatment, and then using fine cleaning cloth to clean.
(6) Punching treatment: and (3) the prepared wire pressing mechanism is punched into a plurality of holes according to power wires of various specifications, the diameters of the holes are different from 1mm to 50mm, and the holes are symmetrically and uniformly distributed, so that the multifunctional wire pressing mechanism is obtained.
The invention has the advantages of
Compared with the prior art, the multifunctional wire pressing mechanism has the advantages of wear resistance, rust resistance, small thermal expansion coefficient and high wear resistance, can be applied to power wires of various specifications, is simple to operate, has high working efficiency, and can effectively reduce the production cost.
Detailed Description
The preparation process of the present invention is further illustrated by the following examples.
Example 1
The invention relates to a preparation method of a multifunctional alloy wire pressing mechanism, which comprises the following components in percentage by weight:fe (where gray iron 0.25%, nodular iron 0.25%), Cu: 1.65%, Mg: 0.85%, Mn: 0.18%, Ni: 1.55%, Zn: 1.9%, B2O3：0.55％，SiO2: 1.85%, TiC: 2%, Pt: 0.6%, Ti: 0.45%, Pb: 0.45 percent and the balance of Al.
A preparation method of a multifunctional alloy wire pressing mechanism comprises the following manufacturing steps:
(1) casting: uniformly mixing the prepared raw materials of the components, adding the mixture into a melting furnace, heating to raise the temperature for melting, adjusting the internal temperature of the melting furnace to 780 ℃ after the raw materials are completely melted, refining, pouring aluminum alloy water into a mold, and finally slowly cooling for 7 hours to obtain a wire pressing mechanism blank.
(2) Pre-treating an embryo body: cleaning an aluminum alloy mechanism blank, removing impurities such as oil stains on the surface, heating the aluminum alloy mechanism to 280 ℃, preserving heat for 2 hours, then heating to 590 ℃, and continuously preserving heat for 3 hours.
(3) Pretreatment of a mold: heating the die to 430 ℃ in a special die heating furnace, preserving heat for 3 hours, and then continuously spraying a secondary lubricant on the working surface of the die.
(4) Forging and pressing: and (3) putting the preheated and heat-insulated cylindrical aluminum alloy blank into a die, and forging and pressing the cylindrical aluminum alloy blank by using a 60MN forging press to obtain a forged blank.
(5) Molding: and (3) carrying out roll forming on the prepared forged blank, continuously heating the blank by using a spray gun in a roller press, carrying out point-by-point connection and plastic deformation generated by an aluminum alloy material, taking down a wire pressing mechanism, and cooling to room temperature for 6 hours.
(5) Grinding and polishing treatment: the method comprises the steps of firstly using an electric fine grinding wheel to perform deburring and grinding on the inner part and the periphery of a line pressing mechanism, then spraying a small amount of lubricating oil on the surface, then using a shutter elastic grinding disc to perform internal and external polishing treatment, and then using fine cleaning cloth to clean.
(6) Punching treatment: and (3) the prepared wire pressing mechanism is punched into a plurality of holes according to power wires of various specifications, the diameters of the holes are different from 1mm to 50mm, and the holes are symmetrically and uniformly distributed, so that the multifunctional wire pressing mechanism is obtained.
Example 2
The invention relates to a preparation method of a multifunctional alloy wire pressing mechanism, which comprises the following components in percentage by weight: fe (where gray iron 0.28%, nodular iron 0.23%), Cu: 1.9%, Mg: 0.95%, Mn: 0.15%, Ni: 1.4%, Zn: 2%, B2O3：0.5％，SiO2: 1.75%, TiC: 2.2%, Pt: 0.7%, Ti: 0.5%, Pb: 0.55 percent and the balance of Al.
A preparation method of a multifunctional alloy wire pressing mechanism comprises the following manufacturing steps:
(1) casting: uniformly mixing the prepared raw materials of the components, adding the mixture into a melting furnace, heating to raise the temperature for melting, adjusting the internal temperature of the melting furnace to 780 ℃ after the raw materials are completely melted, refining, pouring aluminum alloy water into a mold, and finally slowly cooling for 7 hours to obtain a wire pressing mechanism blank.
(2) Pre-treating an embryo body: cleaning an aluminum alloy mechanism blank, removing impurities such as surface oil stains and the like, heating the aluminum alloy mechanism to 285 ℃, preserving heat for 3 hours, then heating to 600 ℃, and continuously preserving heat for 5 hours.
(3) Pretreatment of a mold: heating the die to 420 ℃ in a special die heating furnace, preserving heat for 5 hours, and then continuously spraying a secondary lubricant on the working surface of the die.
(4) Forging and pressing: and putting the preheated and heat-insulated cylindrical aluminum alloy blank into a die, and forging and pressing the cylindrical aluminum alloy blank by using a 70MN forging press to obtain a forged blank.
(5) Molding: and (3) carrying out roll forming on the prepared forged blank, continuously heating the blank by using a spray gun in a roller press, carrying out point-by-point connection and plastic deformation generated by an aluminum alloy material, taking down a wire pressing mechanism, and cooling to room temperature for 7 hours.
(5) Grinding and polishing treatment: the method comprises the steps of firstly using an electric fine grinding wheel to perform deburring and grinding on the inner part and the periphery of a line pressing mechanism, then spraying a small amount of lubricating oil on the surface, then using a shutter elastic grinding disc to perform internal and external polishing treatment, and then using fine cleaning cloth to clean.
(6) Punching treatment: and (3) the prepared wire pressing mechanism is punched into a plurality of holes according to power wires of various specifications, the diameters of the holes are different from 1mm to 50mm, and the holes are symmetrically and uniformly distributed, so that the multifunctional wire pressing mechanism is obtained.
Example 3
The invention relates to a preparation method of a multifunctional alloy wire pressing mechanism, which comprises the following components in percentage by weight: fe (where gray iron 0.2%, nodular iron 0.28%), Cu: 2.2%, Mg: 0.65%, Mn: 0.22%, Ni: 1.75%, Zn: 1.6%, B2O3：0.5％，SiO2: 2.4%, TiC: 2.5%, Pt: 0.7%, Ti: 0.6%, Pb: 0.65%, and the balance Al.
A preparation method of a multifunctional alloy wire pressing mechanism comprises the following manufacturing steps:
(1) casting: uniformly mixing the prepared raw materials of the components, adding the mixture into a melting furnace, heating to raise the temperature for melting, adjusting the internal temperature of the melting furnace to 800 ℃ for refining after the raw materials are completely melted, pouring aluminum alloy water into a mold, and finally slowly cooling for 6.5 hours to obtain a wire pressing mechanism blank.
(2) Pre-treating an embryo body: cleaning the blank of the aluminum alloy mechanism, removing impurities such as oil stains on the surface, heating the aluminum alloy mechanism to 290 ℃, preserving heat for 3 hours, then heating to 610 ℃, and continuously preserving heat for 5 hours.
(3) Pretreatment of a mold: heating the die to 450 ℃ in a special die heating furnace, preserving heat for 4 hours, and then continuously spraying a secondary lubricant on the working surface of the die.
(4) Forging and pressing: and (3) putting the preheated and heat-insulated cylindrical aluminum alloy blank into a die, and forging and pressing the cylindrical aluminum alloy blank by using an 80MN forging press to obtain a forged blank.
(5) Molding: and (3) carrying out roll forming on the prepared forged blank, continuously heating the blank by using a spray gun in a roller press, carrying out point-by-point connection and plastic deformation generated by an aluminum alloy material, taking down a wire pressing mechanism, and cooling to room temperature for 6 hours.
(5) Grinding and polishing treatment: the method comprises the steps of firstly using an electric fine grinding wheel to perform deburring and grinding on the inner part and the periphery of a line pressing mechanism, then spraying a small amount of lubricating oil on the surface, then using a shutter elastic grinding disc to perform internal and external polishing treatment, and then using fine cleaning cloth to clean.
(6) Punching treatment: and (3) the prepared wire pressing mechanism is punched into a plurality of holes according to power wires of various specifications, the diameters of the holes are different from 1mm to 50mm, and the holes are symmetrically and uniformly distributed, so that the multifunctional wire pressing mechanism is obtained.
The invention relates to a multifunctional alloy wire pressing mechanism component material, which has the following main mechanical property data:
| performance of | Tensile strength (MPa) | Yield strength (MPa) | Hardness (HB) | Elongation (%) |
| Detecting data | 385-395 | 330-350 | 97.5-99 | 15-18 |
The invention provides a thought and a method, and a plurality of methods and ways for realizing the technical scheme are provided, and the above description is only the preferred embodiment of the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should be considered as within the scope of the present invention, and each component which is not specified in the present embodiment can be implemented by using the prior art.
Claims (3)
1. The preparation method of the multifunctional alloy wire pressing mechanism is characterized in that the wire pressing mechanism is prepared from the following components in percentage by weight: fe (wherein gray iron is 0.18-0.3%, nodular iron is 0.22-0.3%, Cu is 1-2.5%, Mg is 0.65-1%, Mn is 0.15-0.25%, Ni is 1.35-2%, Zn is 1.3-2.5%, B2O3：0.45％～0.65％，SiO2: 1.55-2.5%, TiC: 1% -3%, Pt: 0.5-0.75%, Ti: 0.4-0.7%, Pb: 0.35 to 0.65 percent of Al, and the balance of Al.
2. The preparation method of the multifunctional alloy wire pressing mechanism according to claim 1, wherein the mechanism material comprises the following components in percentage by weight: fe (where gray iron 0.25%, nodular iron 0.25%), Cu: 1.65%, Mg: 0.85%, Mn: 0.18%, Ni: 1.55%, Zn: 1.9%, B2O3：0.55％，SiO2: 1.85%, TiC: 2%, Pt: 0.6%, Ti: 0.45%, Pb: 0.45 percent and the balance of Al.
3. The preparation method of the multifunctional alloy wire pressing mechanism according to claim 1, characterized by comprising the following manufacturing steps:
(1) casting: uniformly mixing the prepared raw materials of each component, adding the mixture into a melting furnace, heating to raise the temperature for melting, adjusting the internal temperature of the melting furnace to 760-800 ℃ for refining after the raw materials are completely melted, pouring aluminum alloy water into a mold, and finally slowly cooling for 6-8 hours to obtain a wire pressing mechanism blank.
(2) Pre-treating an embryo body: cleaning the blank material of the aluminum alloy mechanism, removing impurities such as oil stain on the surface, heating the aluminum alloy mechanism to 260-300 ℃, preserving heat for 2-4 h, then heating to 580-620 ℃, and continuously preserving heat for 3-6 h.
(3) Pretreatment of a mold: heating the die to 420-450 ℃ in a special die heating furnace, preserving heat for 3-5 h, and continuously spraying a secondary lubricant on the working surface of the die.
(4) Forging and pressing: the preheated and insulated cylindrical aluminum alloy blank is put into a die and forged by a 60 MN-80 MN forging press to prepare a forged blank.
(5) Molding: and (3) carrying out roll forming on the prepared forged blank, continuously heating the blank by using a spray gun in a roller press, carrying out point-by-point connection and plastic deformation through an aluminum alloy material, taking down a wire pressing mechanism, and cooling to room temperature for 6-8 hours.
(5) Grinding and polishing treatment: the method comprises the steps of firstly using an electric fine grinding wheel to perform deburring and grinding on the inner part and the periphery of a line pressing mechanism, then spraying a small amount of lubricating oil on the surface, then using a shutter elastic grinding disc to perform internal and external polishing treatment, and then using fine cleaning cloth to clean.
(6) Punching treatment: and (3) the prepared wire pressing mechanism is punched into a plurality of holes according to power wires of various specifications, the diameters of the holes are different from 1mm to 50mm, and the holes are symmetrically and uniformly distributed, so that the multifunctional wire pressing mechanism is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111515214.9A CN114214544A (en) | 2021-12-13 | 2021-12-13 | Preparation method of multifunctional alloy wire pressing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111515214.9A CN114214544A (en) | 2021-12-13 | 2021-12-13 | Preparation method of multifunctional alloy wire pressing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114214544A true CN114214544A (en) | 2022-03-22 |
Family
ID=80701139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111515214.9A Pending CN114214544A (en) | 2021-12-13 | 2021-12-13 | Preparation method of multifunctional alloy wire pressing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114214544A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115216678A (en) * | 2022-07-13 | 2022-10-21 | 宜兴市宁远模具科技有限公司 | High-precision sealing head die and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110066947A (en) * | 2019-05-29 | 2019-07-30 | 无锡市诚天诺执行器制造有限公司 | A kind of pneumatic actuator piston material and preparation method thereof |
-
2021
- 2021-12-13 CN CN202111515214.9A patent/CN114214544A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110066947A (en) * | 2019-05-29 | 2019-07-30 | 无锡市诚天诺执行器制造有限公司 | A kind of pneumatic actuator piston material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115216678A (en) * | 2022-07-13 | 2022-10-21 | 宜兴市宁远模具科技有限公司 | High-precision sealing head die and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102837165B (en) | Manufacturing method for final-stage driving gear of high-power coal mining machine | |
| CN111334727B (en) | Preparation method of high-temperature alloy wire for improving yield of high-temperature alloy rivet | |
| CN107552712A (en) | The production technology and production equipment of one Albatra metal valve forging | |
| CN113083886B (en) | Controlled rolling and controlled cooling method for improving drawing performance of low-carbon cold heading steel wire rod | |
| CN104400344A (en) | Bolt manufacturing technology | |
| CN104975206A (en) | Material of cylinder body of pneumatic actuating mechanism and preparation method thereof | |
| CN102284835A (en) | Method for producing 10.9-class vehicle bolt of above M12 | |
| CN114214544A (en) | Preparation method of multifunctional alloy wire pressing mechanism | |
| CN102847734A (en) | Manufacturing method of 18CrNi8 coiled cold-drawn material for cold extrusion and its product | |
| CN103774058B (en) | For the guide wheel preparation method of high precision KOCKS guide assembly | |
| CN112126756B (en) | Forging and heat treatment process of blank | |
| CN107964578A (en) | A kind of automobile die steel processing technology | |
| CN103320596B (en) | Manufacturing process of tin-phosphor bronze stretching rod | |
| CN110625051B (en) | Manufacturing method for integrally forging three-crank-pin crankshaft forging piece | |
| CN109338064B (en) | Preparation method of alloy steel 1.6582 forged circle for heavy-duty gear | |
| CN107514425A (en) | The preparation method of bearing ball | |
| CN114214566A (en) | Valve body for petrochemical industry and preparation method thereof | |
| CN105195703A (en) | Process for producing novel steel-base copper alloy bi-metal synthetic material | |
| CN114101557B (en) | Forging method of aluminum alloy steering knuckle | |
| CN113680820B (en) | Rolling control and cooling control process for improving cold heading performance of wire rod for medium carbon alloy cold extrusion sleeve | |
| CN111715817B (en) | Method for improving rotary forging yield of titanium alloy wire | |
| CN103846635A (en) | Forging method for automotive engine crankshaft | |
| CN109262203B (en) | Preparation method of impact-resistant alloy tool steel ball | |
| CN114318082A (en) | Preparation method of high-performance aluminum alloy cylinder body material | |
| CN207464096U (en) | The production equipment of one Albatra metal valve forging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220322 |
|
| WD01 | Invention patent application deemed withdrawn after publication |