CN111518997A - Machining process of anti-skid flange nut - Google Patents
Machining process of anti-skid flange nut Download PDFInfo
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- CN111518997A CN111518997A CN202010484780.7A CN202010484780A CN111518997A CN 111518997 A CN111518997 A CN 111518997A CN 202010484780 A CN202010484780 A CN 202010484780A CN 111518997 A CN111518997 A CN 111518997A
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- flange nut
- cooling
- nut
- steel plate
- skid
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/64—Making machine elements nuts
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to a processing technology of an anti-skid flange nut, and belongs to the technical field of pin shaft processing. The processing technology comprises the following steps: alloy steel used by the anti-skid flange nut is smelted and cast into a steel billet; the steel billet is subjected to intermediate frequency heating, and then hot rolling and cold rolling are sequentially carried out to prepare a steel plate; and (3) carrying out secondary annealing treatment on the steel plate, and carrying out cold forging forming and thread processing on the steel plate to obtain the finished product of the anti-skid flange nut. According to the invention, the alloy steel is subjected to intermediate frequency heating, then hot rolling and cold rolling are sequentially carried out, secondary annealing treatment is combined, cold forging forming is adopted, and finally specific black Dacromet treatment and sealing treatment are matched, so that the strength, toughness and plasticity of the nut are further comprehensively improved, the precision of the nut is ensured, and the production efficiency is greatly improved.
Description
Technical Field
The invention relates to a processing technology of an anti-skid flange nut, and belongs to the technical field of nut processing.
Background
Flanged nuts, also known as washer nuts, spline nuts, hexagonal flange face nuts, flanged nuts and the like. The nut is mostly used on a pipeline connection or a workpiece needing to increase the contact surface of the nut. The flange nut and the general hexagonal nut have the same size and thread specification basically, but compared with the hexagonal nut, the flange nut and the general hexagonal nut are integrated by the gasket and the nut, and the anti-skid insections are arranged below the flange nut and the general hexagonal nut, so that the surface area contact of the nut and a workpiece is increased, and compared with the combination of the common nut and a gasket, the flange nut is firmer and has larger pulling force. The typical flange nut size is generally below M20, and is limited by the work piece since most flange nuts are used on pipes and flanges, and is less than nuts. Most of the flange nuts above M20 are flat flanges, i.e. there are no insections on the flange face, and most of these nuts are used in special equipment and places.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the processing technology of the anti-skid flange nut, so that the manufactured nut has high precision, high strength, good plasticity and strong toughness and has good comprehensive performance.
The above object of the present invention can be achieved by the following technical solutions: a processing technology of an anti-skid flange nut comprises the following steps:
alloy steel used by the anti-skid flange nut is smelted and cast into a steel billet;
the steel billet is subjected to intermediate frequency heating, and then hot rolling and cold rolling are sequentially carried out to prepare a steel plate;
and (3) carrying out secondary annealing treatment on the steel plate, and then carrying out cold forging and thread machining to obtain the finished product of the anti-skid flange nut.
Preferably, the smelting temperature is 1450-.
Preferably, the temperature of the intermediate-frequency heating is 960-1020 ℃, and the frequency is 15-25 s.
Preferably, the hot rolling is specifically hot rolling at 920-940 ℃, and then cooling to room temperature at a cooling rate of 60-80 ℃/sec.
Preferably, the cold rolling is performed in multiple cold rolling passes, and each cold rolling pass is performed in a small deformation rolling process.
Preferably, the secondary annealing treatment specifically comprises: heating the steel plate to 750 plus 760 ℃ and preserving heat for 2-5min, then cooling to 580 plus 620 ℃ within 2-3min, preserving heat for 2-5min at 580 plus 620 ℃, and then cooling to room temperature; then heating to 750 ℃ at 720 and keeping the temperature for 2-5min, cooling to 280 ℃ at 250 and 280 ℃ within 3-5min, keeping the temperature for 2-5min at 250 and 280 ℃, and then cooling to room temperature.
Further preferably, the average heating rate is 20 to 50 ℃/sec.
Further preferably, the cooling is carried out at a rate of 10 to 30 ℃/sec to room temperature.
Preferably, the cold forging and the thread processing further include a curing treatment and a sealing treatment.
More preferably, the curing treatment is black dacromet treatment, and the black dacromet coating liquid used is a black dacromet coating liquid which is already applied in the previous patent of the company, and specifically comprises the following components (counted by weight parts): 50 parts of epoxy resin; 20-40 parts of black pigment; 50-60 parts of zinc powder; 0.1-0.5 part of dispersant; 0.5-3 parts of alcohol solvent; 2-10 parts of chromic acid solution; 40-100 parts of organic solvent.
More preferably, the sealing treatment is carried out in a silicate water-based paint, the temperature of the sealing treatment is 330-350 ℃, and the time is 2-3 min.
Compared with the prior art, the invention firstly heats the alloy steel at medium frequency, then sequentially carries out hot rolling and cold rolling, combines secondary annealing treatment, then adopts cold forging forming, and finally is matched with specific black Dacromet treatment and sealing treatment, thereby further comprehensively improving the strength, toughness and plasticity of the nut, simultaneously ensuring the precision of the nut and greatly improving the production efficiency.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
The alloy steel of the nut can be various high-hardness and high-strength alloy steels, such as 42CrMo steel, and can also be alloy steel optimized on the basis of 42CrMo, and the alloy steel adopted in the embodiment of the invention is C0.36-0.42%, Si 0.88-1.2%, Mn 1.6-2.5%, P less than or equal to 0.025%, S less than or equal to 0.025%, Cr0.55-0.78%, Mo0.25-0.35%, V0.12-0.22%, Ti 0.12-0.25%, Nb0.05-0.15%, and the balance of Fe and inevitable impurities.
Example 1
Smelting alloy steel used by the anti-skid flange nut at 1480 ℃ and casting the alloy steel into a steel billet, wherein the alloy steel comprises 0.38% of C, 0.10% of Si, 2.1% of Mn, less than or equal to 0.025% of P, less than or equal to 0.025% of S, 0.66% of Cr0.66%, 0.30% of Mo0.18%, 0.16% of Ti, 0.1% of Nb0, and the balance of Fe and inevitable impurities;
heating a steel billet at 990 ℃ in a medium frequency manner, then hot rolling at 930 ℃, cooling to room temperature at a cooling speed of 70 ℃/second, and then rolling into a steel plate by adopting multiple cold rolling processes, wherein each cold rolling process adopts small-deformation rolling;
the method for carrying out secondary annealing treatment on the steel plate comprises the following specific steps: heating the steel plate to 755 ℃ at an average speed of 35 ℃/s, preserving heat for 3min, cooling to 600 ℃ within 3min, preserving heat for 3min at 600 ℃, and then cooling to room temperature at a speed of 20 ℃/s; heating to 730 ℃ at an average speed of 35 ℃/s and preserving heat for 3min, cooling to 265 ℃ within 4min, preserving heat for 3min at 265 ℃, cooling to room temperature at a speed of 20 ℃/s, performing cold forging forming and thread processing on the annealed steel plate, dip-coating in black Dacromet coating liquid, drying, and then performing sealing treatment in silicate water-based paint at 340 ℃ for 2min to obtain the anti-slip flange nut. The black dacromet coating solution used in this example comprises the following components (in parts by weight): 50 parts of epoxy resin; 15 parts of graphite and 15 parts of activated carbon; 55 parts of zinc powder; 0.3 part of lauryl alcohol polyoxyethylene ether; 2 parts of a propanol solvent; 6 parts of chromic acid solution; 60 parts of a toluene solvent. The tensile strength of the antiskid flange nut prepared in the embodiment is 750MPa, the yield strength is 1020MPa, A21% and Z47%.
Example 2
Smelting alloy steel used by the antiskid flange nut at 1500 ℃ and casting the alloy steel into a steel billet, wherein the alloy steel comprises 0.40% of C, 0.96% of Si, 2.3% of Mn, less than or equal to 0.025% of P, less than or equal to 0.025% of S, 0.72% of Cr0.72%, 0.28% of Mo0.28%, 0.2% of V, 0.15% of Ti, 0.12% of Nb0.12%, and the balance of Fe and inevitable impurities;
the method comprises the following steps of firstly heating a steel billet at a medium frequency at 1000 ℃, then hot rolling at 925 ℃, cooling to room temperature at a cooling speed of 65 ℃/second, and then rolling into a steel plate by adopting multiple cold rolling processes, wherein each cold rolling process adopts small-deformation rolling;
the method for carrying out secondary annealing treatment on the steel plate comprises the following specific steps: heating the steel plate to 752 ℃ at an average speed of 25 ℃/s, preserving heat for 4min, cooling to 590 ℃ within 3min, preserving heat for 4min at 590 ℃, and then cooling to room temperature at a speed of 15 ℃/s; heating to 725 ℃ at an average speed of 25 ℃/s and preserving heat for 4min, cooling to 270 ℃ in 4min, preserving heat for 4min at 270 ℃, cooling to room temperature at a speed of 15 ℃/s, performing cold forging forming and thread processing on the annealed steel plate, dip-coating in black Dacromet coating liquid, drying, and then performing sealing treatment in silicate water-based paint at the sealing treatment temperature of 335 ℃ for 3min to obtain the anti-slip flange nut. The black Dacromet coating liquid comprises the following components in parts by weight: 50 parts of epoxy resin; 35 parts of carbon black; 53 parts of zinc powder; 0.4 part of tetradecanol polyoxyethylene ether; 1 part of an isopropanol solvent; 4 parts of chromic acid solution; 80 parts of benzene solvent. The tensile strength of the anti-skid flange nut prepared in the embodiment is 730MPa, the yield strength is 1020MPa, A22% and Z47%.
Example 3
Smelting alloy steel used by the antiskid flange nut at 1450 ℃ and casting the alloy steel into a steel billet, wherein the alloy steel comprises 0.36% of C, 1.2% of Si, 1.6% of Mn, less than or equal to 0.025% of P, less than or equal to 0.025% of S, 0.78% of Cr0.78%, 0.25% of Mo0.25%, 0.22% of V, 0.12% of Ti, 0.05-0.15% of Nb0.15%, and the balance of Fe and inevitable impurities;
the method comprises the following steps of firstly heating a steel billet at a medium frequency at 970 ℃, then hot rolling the steel billet at 935 ℃, cooling the steel billet to room temperature at a cooling speed of 75 ℃/second, and then rolling the steel billet into a steel plate by adopting a plurality of cold rolling processes, wherein each cold rolling process adopts small deformation rolling;
the method for carrying out secondary annealing treatment on the steel plate comprises the following specific steps: heating the steel plate to 760 ℃ at an average speed of 50 ℃/s and preserving heat for 2min, then cooling to 620 ℃ within 2min, preserving heat for 2min at 620 ℃, and then cooling to room temperature at a speed of 25 ℃/s; and then heating to 750 ℃ at an average speed of 50 ℃/s and preserving heat for 2min, cooling to 280 ℃ within 3min, preserving heat for 2min at 280 ℃, cooling to room temperature at a speed of 25 ℃/s, performing cold forging forming and thread processing on the annealed steel plate, dip-coating in black Dacromet coating liquid, drying, and then performing sealing treatment in silicate water-based paint, wherein the sealing treatment temperature is 350 ℃ and the sealing treatment time is 3min to obtain the anti-slip flange nut. The black Dacromet coating liquid comprises the following components in parts by weight: 50 parts of epoxy resin; 20 parts of activated carbon; 60 parts of zinc powder; 0.1 part of cetyl alcohol polyoxyethylene ether; 3 parts of n-butanol solvent; 2 parts of chromic acid solution; 100 parts of xylene solvent. The tensile strength of the antiskid flange nut prepared in the embodiment is 725MPa, the yield strength is 1010MPa, A22% and Z48%.
Example 4
Smelting alloy steel used by the antiskid flange nut at 1520 ℃ and casting the alloy steel into a steel billet, wherein the alloy steel comprises 0.42 percent of C, 0.88 percent of Si, 2.5 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.025 percent of S, 0.55 percent of Cr0.55 percent of Mo0.35 percent of V, 0.12 percent of Ti, 0.25 percent of Nb0.05-0.15 percent of Nb, and the balance of Fe and inevitable impurities;
the method comprises the following steps of firstly heating a steel billet at a medium frequency at 960 ℃, then hot rolling at 920 ℃, cooling to room temperature at a cooling speed of 60 ℃/second, and then rolling into a steel plate by adopting a plurality of cold rolling processes, wherein each cold rolling process adopts a small deformation amount for rolling;
the method for carrying out secondary annealing treatment on the steel plate comprises the following specific steps: heating the steel plate to 750 ℃ at an average speed of 20 ℃/s and preserving heat for 5min, then cooling to 580 ℃ within 3min, preserving heat for 5min at 580 ℃, and then cooling to room temperature at a speed of 10 ℃/s; heating to 720 ℃ at an average speed of 20 ℃/s and preserving heat for 5min, cooling to 250 ℃ within 5min, preserving heat for 5min at 250 ℃, cooling to room temperature at a speed of 10 ℃/s, cold forging and thread processing the annealed steel plate, dip-coating in black Dacromet coating liquid, drying, and then sealing in silicate water-based paint at 330 ℃ for 3min to obtain the anti-slip flange nut. The black Dacromet coating liquid comprises the following components in parts by weight: 50 parts of epoxy resin; 20 parts of activated carbon; 60 parts of zinc powder; 0.1 part of cetyl alcohol polyoxyethylene ether; 3 parts of n-butanol solvent; 2 parts of chromic acid solution; 100 parts of xylene solvent. The tensile strength of the antiskid flange nut prepared in the embodiment is 710MPa, the yield strength is 1008MPa, A22% and Z48%.
In conclusion, the invention firstly heats the alloy steel at medium frequency, then sequentially carries out hot rolling and cold rolling, combines secondary annealing treatment, then adopts cold forging forming, and finally is matched with specific black Dacromet treatment and sealing treatment, thereby further comprehensively improving the strength, toughness and plasticity of the forged nut, ensuring the precision of the forged nut and greatly improving the production efficiency.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the true spirit and scope of the present invention.
Claims (10)
1. The machining process of the anti-skid flange nut is characterized by comprising the following steps of:
alloy steel used by the anti-skid flange nut is smelted and cast into a steel billet;
the steel billet is subjected to intermediate frequency heating, and then hot rolling and cold rolling are sequentially carried out to prepare a steel plate;
and (3) carrying out secondary annealing treatment on the steel plate, and carrying out cold forging forming and thread processing on the steel plate to obtain the finished product of the anti-skid flange nut.
2. The process for manufacturing an anti-slip flange nut as claimed in claim 1, wherein the melting temperature is 1450-.
3. The process for machining the anti-skid flange nut as claimed in claim 1, wherein the temperature of the medium-frequency heating is 960-1020 ℃ and the frequency is 15-25 s.
4. The process for manufacturing a slip-resistant flange nut as claimed in claim 1, wherein the hot rolling is specifically hot rolling at 920-940 ℃, and then cooling to room temperature at a cooling rate of 60-80 ℃/sec.
5. The process for machining the anti-skid flange nut as claimed in claim 1, wherein the cold rolling is performed in multiple cold rolling passes, and each cold rolling pass is performed in a small deformation rolling mode.
6. The machining process of the anti-skid flange nut as claimed in claim 1, wherein the secondary annealing treatment specifically comprises the following steps: heating the steel plate to 750 plus 760 ℃ and preserving heat for 2-5min, then cooling to 580 plus 620 ℃ within 2-3min, preserving heat for 2-5min at 580 plus 620 ℃, and then cooling to room temperature; then heating to 750 ℃ at 720 and keeping the temperature for 2-5min, cooling to 280 ℃ at 250 and 280 ℃ within 3-5min, keeping the temperature for 2-5min at 250 and 280 ℃, and then cooling to room temperature.
7. The process for manufacturing a slip flange nut as claimed in claim 6, wherein the average heating rate is 20-50 ℃/sec.
8. The process for manufacturing a slip flange nut according to claim 6, wherein the cooling is performed at a rate of 10-30 ℃/sec to room temperature.
9. The process for manufacturing an anti-slip flange nut as claimed in claim 1, wherein the cold forging and the thread forming further comprise a curing process and a sealing process.
10. The process for manufacturing an anti-slip flange nut as claimed in claim 9, wherein the sealing treatment is performed in a silicate water-based paint at a temperature of 330 and 350 ℃ for 2-3 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010484780.7A CN111518997A (en) | 2020-06-01 | 2020-06-01 | Machining process of anti-skid flange nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010484780.7A CN111518997A (en) | 2020-06-01 | 2020-06-01 | Machining process of anti-skid flange nut |
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| CN111518997A true CN111518997A (en) | 2020-08-11 |
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|---|---|---|---|
| CN202010484780.7A Pending CN111518997A (en) | 2020-06-01 | 2020-06-01 | Machining process of anti-skid flange nut |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050023620A (en) * | 2003-09-01 | 2005-03-10 | 주식회사 태정기공 | Fixing washer for two-piece flange nut using cold forging and manufacturing method thereof |
| CN104805258A (en) * | 2014-06-27 | 2015-07-29 | 河北工程大学 | 42CrMo steel fast spheroidizing annealing method |
| CN109652625A (en) * | 2019-01-15 | 2019-04-19 | 象山华鹰塑料工程有限公司 | A kind of automotive window super high tensile cold-rolled steel plate manufacturing process |
-
2020
- 2020-06-01 CN CN202010484780.7A patent/CN111518997A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050023620A (en) * | 2003-09-01 | 2005-03-10 | 주식회사 태정기공 | Fixing washer for two-piece flange nut using cold forging and manufacturing method thereof |
| CN104805258A (en) * | 2014-06-27 | 2015-07-29 | 河北工程大学 | 42CrMo steel fast spheroidizing annealing method |
| CN109652625A (en) * | 2019-01-15 | 2019-04-19 | 象山华鹰塑料工程有限公司 | A kind of automotive window super high tensile cold-rolled steel plate manufacturing process |
Non-Patent Citations (1)
| Title |
|---|
| 王延溥等: "《金属塑性加工学：轧制理论与工艺》", 冶金工业出版社, pages: 135 - 136 * |
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