CN110056590A - It is a kind of for rolling the profile wire and its preparation process of underload die springs - Google Patents
It is a kind of for rolling the profile wire and its preparation process of underload die springs Download PDFInfo
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- CN110056590A CN110056590A CN201910385346.0A CN201910385346A CN110056590A CN 110056590 A CN110056590 A CN 110056590A CN 201910385346 A CN201910385346 A CN 201910385346A CN 110056590 A CN110056590 A CN 110056590A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/042—Wound springs characterised by the cross-section of the wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/18—Roll crown; roll profile
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2226/00—Manufacturing; Treatments
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Metal Rolling (AREA)
Abstract
The present invention discloses a kind of for rolling the profile wire and its preparation process of underload die springs, is related to metal product technical field.The section of heretofore described profile wire is imitative trapezoid cross section, and two waists are about two straight lines substantially symmetrical about its central axis, and upper bottom edge is the circular arc line tangent with two waists, and bottom is straight line, and bottom is all made of transition arc with the corner of two waists and connect.Processing is optimized to the section of profile wire in one aspect of the present invention, on the other hand improvement is made that preparation process, substantially increase the comprehensive mechanical property of profile wire, steel wire surface is also avoided to scratch, improve the surface quality of steel wire simultaneously, and it is at low cost, versatile, the spring steel wire material that one kind easily rolls, quality is high, waste product is few is provided for the subsequent spring manufacturing enterprise for rolling underload die springs using profile wire.
Description
Technical field
The present invention relates to metal product technical fields, are more specifically related to a kind of for rolling the different of underload die springs
Shaped steel wire and its preparation process.
Background technique
With deepening continuously for China's Economic Reform, industrial products upgrading becomes inevitable choice, and as Chinese manufacturing
The Steel Wire Products Industry on basis is also such.Currently, domestic common shaped wire excess capacity, price drop, but high product are special-shaped
Matter wire rod but still needs import, greatly without the obvious characteristic for having become the development of China's Steel Wire Products Industry by force, therefore it is high-end
The Production for Steel Wire technical problem urgent need to resolve of special-shaped compound section.Up to now, domestic metal product producer underloading produced
The section of lotus die springs profile wire is predominantly trapezoidal.The section design difficulty of trapezoidal wire is: should consider trapezoidal
Stress equalization of the steel wire in coiling process and pre- allowance is deformed, the section that also guarantee to roll into spring steel wire after spring to the greatest extent may be used
It can just can guarantee that spring has maximum deformation energy in this way close to rectangle.The difficult point of manufacturing of trapezoidal wire is: if ladder
Shape steel wire with soft state (annealed state) deliver goods, roll spring after be heat-treated again, then spring is easily deformed and generates waste product；Such as
Fruit trapezoidal wire after heat treatment with the delivery of oil-tempered state, is very easy to phenomenon of rupture occur, causes to roll up when rolling spring
Spring failure even damage wind spring equipment.
In view of the above technical problems, many Production for Steel Wire producers also attempt to design and produce the steel in approximate trapezoid section
Silk, traditional representative structure one as shown in Figure 1 and traditional representative structure two as shown in Figure 2.The steel wire of traditional representative structure one
Section is the isosceles trapezoid of slightly circular arc, i.e., trapezoidal upper bottom, bottom and two waists are the biggish circular arc lines of radius, and four Duan Yuan
Corner between arc is also transition arc connection；Although the section of steel wire of traditional representative structure one has fully considered coiling process
The stress equalization of middle steel wire and deform pre- allowance, but due in section of steel wire arc section it is excessive, be on the one hand the production of mold
Difficulty is big, at high cost, be on the other hand actual production finished product section of steel wire and design section error it is larger, it is difficult to guarantee volume
The section of spring steel wire after spring is made close to rectangle, practicability and versatility are poor, are difficult to promote.Traditional representative structure two
Section of steel wire be upper bottom be it is semicircle, bottom is triangle evagination, the approximate trapezoid that two waists are straight line；Although traditional representative structure
Two section of steel wire can to avoid when rolling spring because squeeze stress caused by section of steel wire be internally recessed, but due to bottom
Triangle evagination be non-continuous circular arc transition, easily there is stress concentration in when stress deformation, is unfavorable for rolling for spring.Cause
This, is handled for rolling the section of profile wire of underload die springs up for advanced optimizing, the ladder after section optimal
Shape steel wire needs satisfaction, and stress equalization and the section after rolling into spring are as close possible to rectangle in coiling process, so
It can guarantee that the spring rolled into has maximum deformation energy.
Meanwhile for guarantee the trapezoidal wire after section optimal can smoothly produce, be easy to roll into spring, it is not easy to break,
Waste product is few, it is also necessary to design matched preparation process.Traditional preparation process (is with preparation process disclosed in CN100395482
Example): preparation process includes the processing steps such as prefabricated mould, breaking down, patenting, two rollings, die drawing, quenching, tempering.Wherein,
Before prefabricated mould, it is also necessary to corresponding to calculating upper and lower bottom edge and the waist in trapezoidal wire section according to given parameter
Arc radius, and then the cross sectional shape of steel wire is decided, then it could come prefabricated rolling mold and die drawing mold with this；Pass through
The mode of die drawing forms, and is on the one hand that the manufacture difficulty of die drawing mold is big, at high cost, the period is long, poor universality, another party's face mould
Steel wire surface easily occurs scratching defect when drawing, seriously affects steel wire surface quality.
Summary of the invention
The purpose of the present invention is exactly the shortcoming being directed in the presence of the above-mentioned prior art and one kind for providing is for rolling up
The profile wire and its preparation process of underload die springs processed.The present invention is by the section optimal to profile wire and to preparation
The improvement of technique substantially increases the comprehensive mechanical property of profile wire, and steel wire surface is avoided to scratch, improve the surface of steel wire
Quality, and it is at low cost, versatile, it is the subsequent spring manufacturing enterprise that underload die springs are rolled using profile wire
Provide the spring steel wire material that one kind easily rolls, quality is high, waste product is few.
The purpose of the present invention can be realized by following technique measures:
A kind of section for rolling the profile wire of underload die springs of the invention is imitative trapezoid cross section, two waists be about
Two straight lines substantially symmetrical about its central axis, upper bottom edge are the circular arc lines tangent with two waists, and bottom is straight line, and bottom and two waists
Corner be all made of transition arc connection.
The height of heretofore described imitative trapezoid cross section is 1.2~2.6 with the ratio range of the length of bottom.
A kind of technique preparing profile wire described in claim 1 of the invention is through the following steps that realize:
(1) Mold Making: according to the requirement of spring finished size and spring force value, determine that each parameter is corresponding in profile wire section
Specific size, and make according to the profile wire section after determination in subsequent handling matching used process rolling mold and
Finished product rolling mold.
(2) sorting: according to selecting corresponding round wire blank to the total deformation of finished product 30%~60% from blank.
(3) process rolls: using universal mill to round wire blank carry out process rolling, obtain profile wire half at
Product, rolling temperature are room temperature, and steel wire walking speed is 4~12 m/min；Wherein, pass composed by the milling train four-roller in universal mill
To be trapezoidal, left and right roller is the circular-roll without angle, and the angle of upper and lower two roller is more than or equal to angle between two waist of section of steel wire
Half is less than or equal to angle between two waist of section of steel wire.
(4) finished product roll: using duo mill to profile wire semi-finished product carry out finished product rolling, obtain profile wire at
Product, rolling temperature are room temperature, and steel wire walking speed is 4~12 m/min；Wherein, pass composed by the roll in duo mill with it is different
The finished form in shaped steel wire section is consistent with size, and up-down rollers are type roller.
(5) quenching-tempering heat treatment: profile wire finished product is heated to 870 with the heating speed of 20~40 DEG C/s~
910 DEG C, keep the temperature 20~25 s；Then, 30~50 DEG C are quenched to the cooling rate of 30~50 DEG C/s；Then, then with 15~20
DEG C/quenched profile wire finished product is heated to 460~500 DEG C by the heating speed of s, 40~60 s are kept the temperature, deformed steel is obtained
Silk product.
The wire microstructure of heretofore described profile wire product is to remain with the tempering of fine acicular martensite exposure
Troostite, tensile strength are the MPa of 1400 MPa~1600, grain size >=9 grade, martensite level is 2 grades.
Design principle of the invention is as follows:
Processing is optimized to the section of profile wire in one aspect of the present invention, is on the other hand made that improvement to preparation process,
The surface quality for substantially increasing the comprehensive mechanical property of profile wire, while also avoiding steel wire surface scuffing, improving steel wire,
And it is at low cost, versatile, it is provided for the subsequent spring manufacturing enterprise for rolling underload die springs using profile wire
It is a kind of easily roll, the spring steel wire material that quality is high, waste product is few.
More specifically: on the one hand, section of steel wire shape of the present invention after optimization processing is reasonable, can either meet and roll up
Stress equalization during spring processed reduces stress concentration point, and can effectively control the pre- allowance of deformation, guarantee to roll into bullet
The section of steel wire relatively rectangle after spring, and then guarantee that spring has biggish deformation energy, substantially increase profile wire
Comprehensive mechanical property；Section of steel wire simple shape of the present invention after optimization processing is easily realized, can be saved with direct rolling and forming
Gone traditional die drawing form in big, the at high cost die drawing mold of manufacture difficulty, it is simple process, at low cost；Due to section of steel wire shape
Shape is simple, and the size of section of steel wire can also be adjusted flexibly according to the needs in spring section, it is only necessary to adjust milling train correspondence and roll
Relative position or angle between roller operate convenient, using flexible, versatile.On the other hand, the present invention is using direct
Roll forming technique avoids the defect that steel wire surface in traditional die drawing moulding process is easy to appear scuffing, substantially increases steel
Silk surface quality；Heat treatment link is improved in preparation process of the invention, it is effective by reasonable cold deformation
Raw material tissue has been refined, the comprehensive mechanical property of profile wire is also further improved.
Advantageous effects of the invention are as follows:
The present invention substantially increases the synthesis of profile wire by the section optimal to profile wire and to the improvement of preparation process
Mechanical property avoids steel wire surface from scratching, improve the surface quality of steel wire, and at low cost, versatile, is subsequent use
Profile wire provides the bullet that one kind easily rolls, quality is high, waste product is few to roll the spring manufacturing enterprise of underload die springs
Spring wire material.
Detailed description of the invention
Fig. 1 is the schematic cross-section of traditional profile wire representative structure one.
Fig. 2 is the schematic cross-section of traditional profile wire representative structure two.
Fig. 3 is profile wire schematic cross-section of the invention.
Mark explanation: the A, length of bottom in figure, C, imitative trapezoid cross section height, the angle of B, two waists, R1, upper bottom edge
Circular arc line radius, R2, transition arc radius, L, central axis.
Specific embodiment
The present invention will be further described in conjunction with following three embodiment and attached drawing:
The section of profile wire in three embodiments of the invention for rolling underload die springs is imitative trapezoid cross section, two waists
It is about symmetrical two straight lines of central axis (L), upper bottom edge is the circular arc line tangent with two waists, and bottom is straight line, and under
Bottom edge is all made of transition arc with the corner of two waists and connect.
The height (C) of trapezoid cross section is imitated described in three embodiments of the invention and the ratio range of the length (A) of bottom is
1.2~2.6.
Profile wire described in three embodiments of the invention is different for manufacturing the different size of underload die springs
Shaped steel wire is all made of 55CrSi material.
Embodiment one
The technique of embodiment one is through the following steps that realize:
(1) Mold Making: according to the requirement of spring finished size and spring force value, determine that each parameter is corresponding in profile wire section
Specific size: i.e. the length (A) of bottom be 5.85 mm, imitate trapezoid cross section height (C) be 14.0 mm, the angle of two waists
It (B) is 6 °, the circular arc line radius (R1) of upper bottom edge is 2.44 mm, and transition arc radius (R2) is 2.3 mm, section of steel wire area
For 70.3 mm2；And made according to the profile wire section after determination in subsequent handling matching used process rolling mold and
Finished product rolling mold.
(2) sorting: according to from blank to the round wire blank of the total deformation of finished product 32% selection φ 11.5.
(3) process rolls: using universal mill to round wire blank carry out process rolling, obtain profile wire half at
Product, rolling temperature are room temperature, and steel wire walking speed is 5m/min；Wherein, pass composed by the milling train four-roller in universal mill is ladder
Shape, left and right roller are the circular-roll without angle, and the angle of upper and lower two roller is 4 °.
(4) finished product roll: using duo mill to profile wire semi-finished product carry out finished product rolling, obtain profile wire at
Product, rolling temperature are room temperature, and steel wire walking speed is 4m/min；Wherein, pass and deformed steel composed by the roll in duo mill
The finished form in silk section is consistent with size, and up-down rollers are type roller.
(5) quenching-tempering heat treatment: profile wire finished product is heated to 870 DEG C with the heating speed of 20 DEG C/s, heat preservation
20s；Then, 30~40 DEG C are quenched to the cooling rate of 31 DEG C/s；It then, then will be quenched with the heating speed of 16 DEG C/s
Profile wire finished product is heated to 460 DEG C, keeps the temperature 43s, obtains profile wire product.
The wire microstructure of profile wire product described in embodiment one is to remain with returning for fine acicular martensite exposure
Fiery troostite, tensile strength 1502MPa, grain size are 10 grades, and martensite level is 2 grades.
Embodiment two
The technique of embodiment two is through the following steps that realize:
(1) Mold Making: according to the requirement of spring finished size and spring force value, determine that each parameter is corresponding in profile wire section
Specific size: i.e. the length (A) of bottom be 5.1 mm, imitate trapezoid cross section height (C) be 11.8 mm, the angle (B) of two waists
It is 8 °, the circular arc line radius (R1) of upper bottom edge is 2.01 mm, and transition arc radius (R2) is 2.0 mm, and section of steel wire area is
50.5 mm2；And made according to the profile wire section after determination in subsequent handling matching used process rolling mold and at
Product rolling mold.
(2) sorting: according to the round wire blank for selecting φ 11.3 to the total deformation of finished product 50% from blank.
(3) process rolls: using universal mill to round wire blank carry out process rolling, obtain profile wire half at
Product, rolling temperature are room temperature, and steel wire walking speed is 8m/min；Wherein, pass composed by the milling train four-roller in universal mill is ladder
Shape, left and right roller are the circular-roll without angle, and the angle of upper and lower two roller is 4 °.
(4) finished product roll: using duo mill to profile wire semi-finished product carry out finished product rolling, obtain profile wire at
Product, rolling temperature are room temperature, and steel wire walking speed is 6m/min；Wherein, pass and deformed steel composed by the roll in duo mill
The finished form in silk section is consistent with size, and up-down rollers are type roller；
(5) quenching-tempering heat treatment: profile wire finished product is heated to 890 DEG C with the heating speed of 30 DEG C/s, keeps the temperature 25s；So
Afterwards, 35~45 DEG C are quenched to the cooling rate of 43 DEG C/s；Then, then with the heating speed of 17 DEG C/s by quenched deformed steel
Silk finished product is heated to 480 DEG C, keeps the temperature 50s, obtains profile wire product.
The wire microstructure of profile wire product described in embodiment two is to remain with returning for fine acicular martensite exposure
Fiery troostite, tensile strength 1579MPa, grain size are 9 grades, and martensite level is 2 grades.
Embodiment three
The technique of embodiment three is through the following steps that realize:
(1) Mold Making: according to the requirement of spring finished size and spring force value, determine that each parameter is corresponding in profile wire section
Specific size: i.e. the length (A) of bottom be 7.2 mm, imitate trapezoid cross section height (C) be 10.6 mm, the angle (B) of two waists
It is 10.0 °, the circular arc line radius (R1) of upper bottom edge is 3.0 mm, and transition arc radius (R2) is 1.5 mm, section of steel wire area
For 60.49mm2；And made according to the profile wire section after determination in subsequent handling matching used process rolling mold and
Finished product rolling mold.
(2) sorting: according to the round wire blank for selecting φ 13.5 to the total deformation of finished product 58% from blank.
(3) process rolls: using universal mill to round wire blank carry out process rolling, obtain profile wire half at
Product, rolling temperature are room temperature, and steel wire walking speed is 12m/min；Wherein, pass composed by the milling train four-roller in universal mill is ladder
Shape, left and right roller are the circular-roll without angle, and the angle of upper and lower two roller is 8 °.
(4) finished product roll: using duo mill to profile wire semi-finished product carry out finished product rolling, obtain profile wire at
Product, rolling temperature are room temperature, and steel wire walking speed is 11m/min；Wherein, pass and deformed steel composed by the roll in duo mill
The finished form in silk section is consistent with size, and up-down rollers are type roller；
(5) quenching-tempering heat treatment: profile wire finished product is heated to 910 DEG C with the heating speed of 40 DEG C/s, keeps the temperature 23s；So
Afterwards, 40~50 DEG C are quenched to the cooling rate of 47 DEG C/s；Then, then with the heating speed of 19 DEG C/s by quenched deformed steel
Silk finished product is heated to 500 DEG C, keeps the temperature 58s, obtains profile wire product.
The wire microstructure of profile wire product described in embodiment three is to remain with returning for fine acicular martensite exposure
Fiery troostite, tensile strength 1453MPa, grain size are 10 grades, and martensite level is 2 grades.
Claims (4)
1. a kind of for rolling the profile wire of underload die springs, it is characterised in that: the section of the profile wire is imitative
Trapezoid cross section, two waists are about symmetrical two straight lines of central axis (L), and upper bottom edge is the circular arc line tangent with two waists, bottom
While being straight line, and bottom is all made of transition arc with the corner of two waists and connect.
2. according to claim 1 for rolling the profile wire of underload die springs, it is characterised in that: the imitative ladder
The ratio range of the length (A) of the height (C) and bottom of tee section is 1.2~2.6.
3. a kind of technique for preparing profile wire described in claim 1, it is characterised in that: the technique through the following steps that
Come what is realized:
(1) Mold Making: according to the requirement of spring finished size and spring force value, determine that each parameter is corresponding in profile wire section
Specific size, and make according to the profile wire section after determination in subsequent handling matching used process rolling mold and
Finished product rolling mold；
(2) sorting: according to selecting corresponding round wire blank to the total deformation of finished product 30%~60% from blank；
(3) process rolls: carrying out process rolling to round wire blank using universal mill, obtains profile wire semi-finished product, rolls
Temperature processed is room temperature, and steel wire walking speed is 4~12 m/min；Wherein, pass composed by the milling train four-roller in universal mill is ladder
Shape, left and right roller are the circular-roll without angle, the angle of upper and lower two roller be more than or equal to the half of angle between two waist of section of steel wire,
Less than or equal to angle between two waist of section of steel wire；
(4) finished product rolls: carrying out finished product rolling to profile wire semi-finished product using duo mill, obtains profile wire finished product, rolls
Temperature processed is room temperature, and steel wire walking speed is 4~12 m/min；Wherein, pass and deformed steel composed by the roll in duo mill
The finished form in silk section is consistent with size, and up-down rollers are type roller；
(5) quenching-tempering heat treatment: being heated to 870~910 DEG C for profile wire finished product with the heating speed of 20~40 DEG C/s,
Keep the temperature 20~25 s；Then, 30~50 DEG C are quenched to the cooling rate of 30~50 DEG C/s；Then, then with 15~20 DEG C/s
Heating speed quenched profile wire finished product is heated to 460~500 DEG C, keep the temperature 40~60 s, obtain profile wire production
Product.
4. technique according to claim 3, it is characterised in that: the wire microstructure of the profile wire product is to retain
There is the secondary troostite of fine acicular martensite exposure, tensile strength is the MPa of 1400 MPa~1600, grain size >=9 grade, geneva
Body rank is 2 grades.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910385346.0A CN110056590B (en) | 2019-05-09 | 2019-05-09 | Preparation process of special-shaped steel wire for rolling light-load die spring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910385346.0A CN110056590B (en) | 2019-05-09 | 2019-05-09 | Preparation process of special-shaped steel wire for rolling light-load die spring |
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| CN110056590A true CN110056590A (en) | 2019-07-26 |
| CN110056590B CN110056590B (en) | 2021-02-19 |
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| CN201910385346.0A Active CN110056590B (en) | 2019-05-09 | 2019-05-09 | Preparation process of special-shaped steel wire for rolling light-load die spring |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110802126A (en) * | 2019-11-26 | 2020-02-18 | 江阴法尔胜异型金属材料有限公司 | Method for processing special-shaped steel wire with trapezoidal section |
| CN113862435A (en) * | 2021-10-09 | 2021-12-31 | 中钢集团郑州金属制品研究院股份有限公司 | Preparation process suitable for high-strength special-shaped spring steel wire |
| CN114570854A (en) * | 2020-11-30 | 2022-06-03 | 宝钢金属有限公司 | Variable cross-section spring steel wire and manufacturing method and device thereof |
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| JP2001347301A (en) * | 2000-06-08 | 2001-12-18 | High Frequency Heattreat Co Ltd | Double taper spring steel wire having cross section with specific shape and its manufacturing method |
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| CN201439808U (en) * | 2009-05-25 | 2010-04-21 | 刘清良 | Special shaped-oval cross-section spring for damper |
| CN201706176U (en) * | 2010-04-22 | 2011-01-12 | 内蒙古一机集团路通弹簧有限公司 | Sectional bar for rolling rectangular torsional springs with large sections |
| CN102537161A (en) * | 2012-01-09 | 2012-07-04 | 杭州弹簧有限公司 | Wire rod wound into spring |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001347301A (en) * | 2000-06-08 | 2001-12-18 | High Frequency Heattreat Co Ltd | Double taper spring steel wire having cross section with specific shape and its manufacturing method |
| CN1789779A (en) * | 2005-11-03 | 2006-06-21 | 上海三联金属制品有限公司 | High-performance profiled steel wire material and preparation method and application thereof |
| CN201439808U (en) * | 2009-05-25 | 2010-04-21 | 刘清良 | Special shaped-oval cross-section spring for damper |
| CN201706176U (en) * | 2010-04-22 | 2011-01-12 | 内蒙古一机集团路通弹簧有限公司 | Sectional bar for rolling rectangular torsional springs with large sections |
| CN102537161A (en) * | 2012-01-09 | 2012-07-04 | 杭州弹簧有限公司 | Wire rod wound into spring |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110802126A (en) * | 2019-11-26 | 2020-02-18 | 江阴法尔胜异型金属材料有限公司 | Method for processing special-shaped steel wire with trapezoidal section |
| CN114570854A (en) * | 2020-11-30 | 2022-06-03 | 宝钢金属有限公司 | Variable cross-section spring steel wire and manufacturing method and device thereof |
| CN113862435A (en) * | 2021-10-09 | 2021-12-31 | 中钢集团郑州金属制品研究院股份有限公司 | Preparation process suitable for high-strength special-shaped spring steel wire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110056590B (en) | 2021-02-19 |
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