CN109109592A - A kind of automobile torsion bar and its manufacture craft - Google Patents
A kind of automobile torsion bar and its manufacture craft Download PDFInfo
- Publication number
- CN109109592A CN109109592A CN201811037381.5A CN201811037381A CN109109592A CN 109109592 A CN109109592 A CN 109109592A CN 201811037381 A CN201811037381 A CN 201811037381A CN 109109592 A CN109109592 A CN 109109592A
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- Prior art keywords
- lever arm
- sand
- connection ring
- torsion bar
- fillet
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 18
- 238000000465 moulding Methods 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 78
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 48
- 239000004576 sand Substances 0.000 claims description 40
- 229910052742 iron Inorganic materials 0.000 claims description 35
- 238000005266 casting Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims description 10
- 229910052748 manganese Inorganic materials 0.000 claims description 9
- 239000011572 manganese Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 229910000805 Pig iron Inorganic materials 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000004615 ingredient Substances 0.000 claims description 8
- 238000011081 inoculation Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000003746 surface roughness Effects 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000003110 molding sand Substances 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 4
- 150000002910 rare earth metals Chemical class 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims 1
- 239000000470 constituent Substances 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
- B60G7/001—Suspension arms, e.g. constructional features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/068—Semi-permanent moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Springs (AREA)
Abstract
The invention discloses a kind of automobile torsion bar and its manufacture crafts, are related to auto parts production technical field.The present invention includes lever arm and the connection ring for being set to lever arm both ends, lever arm two sides are that concave surface makes lever arm cross section I-shaped, one concave surface middle position of lever arm is provided with reinforcing rib, through-hole is provided in connection ring makes connection ring form cylindrical annular configuration, the outer surface of lever arm both ends and connection ring junction is provided with the first fillet, the inner surface of lever arm both ends and connection ring junction is provided with the second fillet, and reinforcing rib both ends and lever arm junction are provided with third fillet.The present invention is designed by reasonable preparation process design and torsion rod structure, the hardness and strength and comprehensive performance for effectively improving torque arm have the advantages of high mechanical resistant impact, high temperature resistant or low temperature, one-pass molding, high production efficiency, with good application prospect.
Description
Technical field
The invention belongs to auto parts production technical fields, turn round more particularly to a kind of automobile torsion bar and a kind of automobile
Power bar manufacture craft.
Background technique
Torque arm be control in vehicle driving stretched between the front and back wheel that occurs, compression, twist motion and improve vehicle peace
The draft hitch of the commerial vehicle of full property.In the past, torque arm, which included, prevents the lateral shaking of vehicle, improves riding stability, inhales
It receives the impact from road surface, improve the function of sense by bus, and keep the function of the distance of rear car between centers and the depth of parallelism of axle.It is former
There is torque arm to be made of iron material, the material of connecting rod is truncated, after processing the single-item of the connecting rod of end and truncation respectively, passes through CO2
The both ends etc. welded and the end is made to be engaged in connecting rod have the shortcomings that manufacturing process's complexity.In addition, the end and connecting rod
The upper face of the welding position of welding is fragile, falls phenomenon, there is a problem of causing product bad.As being intended to improve
The prior art of this problem, improves original by means of the end of welding and the connection type of connecting rod, adds using to connecting rod
Heat and punch forming are the swaging process that ripple mark is engaged, it is thus possible to prevent the seaming institute occurred by original welding
Caused by product it is bad.Although the prior art has the connecting portion for being improved end and connecting rod by means of swaging process
Advantage, but due to the process after the single-item of processing end and connecting rod, by being attached by single-item of the swaged forging process to processing
It constitutes, thus there are problems that productivity is low, process loss occurs, and the torque arm dimensional accuracy produced is low, expend raw material
Amount is big.
Summary of the invention
The purpose of the present invention is to provide a kind of automobile torsion bar and its manufacture crafts, and torque arm is made to have higher hardness
With dimensional accuracy and comprehensive performance, and step of preparation process advantages of simple, one-pass molding.
The present invention is achieved by the following technical solutions:
The present invention is a kind of automobile torsion bar and its manufacture craft, a kind of automobile torsion bar, including lever arm and is set to bar
The connection ring at arm both ends, the lever arm two sides are that concave surface makes lever arm cross section I-shaped, the one concave surface interposition of lever arm
It installs and is equipped with reinforcing rib, through-hole is provided in the connection ring makes connection ring form cylindrical annular configuration.
Further, the outer surface of the lever arm both ends and connection ring junction is provided with the first fillet, the lever arm two
The inner surface of end and connection ring junction is provided with the second fillet, and the reinforcing rib both ends and lever arm junction are provided with third circle
Angle.
Further, the manufacture craft of a kind of automobile torsion bar, which is characterized in that the manufacture craft includes following
Several steps:
SS01, melting and ingredient selection
Steel scrap, foundry returns and the pig iron, the quality accounting of ingredient are as follows: steel scrap 30%, the pig iron are sequentially added in smelting furnace
70%, molten iron temperature is risen to 1350 DEG C and removes the slag on molten iron surface, takes base iron to carry out chemical composition analysis, adds silicon
Molten iron chemical composition is required adjustment as follows by iron, manganese iron: C3.9%~3.95%, Si1.7%~1.8%, Mn <
0.25%, P < 0.06%, S < 0.03%, Cu < 0.05%, Sn < 0.06%, Cr < 0.06%, Ni < 0.06%；
SS02, nodularization and inoculation
Thermometric, molten iron temperature are 1420 DEG C~1450 DEG C progress spheroidization and inoculations, and inovulant selects FeSi75, nodulizer selection
Rare earth ferrosilicomagnesium nodulizer FeSiMg8Re7, inovulant FeSi75 are added in two portions, and an additional amount is 0.4%, secondary addition
Amount is 0.5%；Nodulizer additional amount is 1.25%~1.3%, and the nodularization time is 50~100s；
SS03, mulling, coremaking and moulding
It is mixed using clay and suitable water as the main binding agent of molding sand with silica sand, then makes and make master mold phase with torque arm
Master mold is fixed on penetrating sand machine workbench by the iron core of cooperation, and iron core and master mold are cooperated, after penetrating sand machine clamps in place,
Sand is incident upon the cavity between master mold and swage by penetrating sand machine sand-spraying hole, penetrates 25~30s of solidification after the completion of sand, completion to be solidified
The swage type chamber of sand is covered in molding after 30 seconds after 25~30s of natural cooling above and below, and the upper mo(u)ld bottom half that will have covered sand places filtering
After net, mould assembling is clamped and is hung on pouring platform；
SS04, casting
The tapping temperature of molten iron is 1510 ± 10 DEG C, and the quality of molten iron discharging is 600 ± 10kg, and the cast temperature of molten iron is
1430 ± 10 DEG C, casting time < 8min, casting completion 15~after twenty minutes, the unpacking taking-up casting of sand mold is destroyed, each chemistry is obtained
Component are as follows: C3.7%~3.95%, Si2.75%~2.85%, Mn < 0.25%, P < 0.06%, S < 0.03%, Cu < 0.05%,
Sn < 0.06%, Cr < 0.06%, Ni < 0.06% torque arm casting；
SS05, ball blast and polishing
Torque arm casting is subjected to ball blast and grinding process, processes fillet in ball blast and bruting process, and examine size,
Surface roughness and torque arm reinforcing rib hardness, obtain torque arm finished product, and torque arm size acceptance criteria should meet GB6414 mark
Quasi- casting tolerance.
Further, the model IFSI260 Ka Siding of the penetrating sand machine covers sand molding machine.
Further, the smelting furnace selection induction middle frequency furnace, its advantage is that heating speed is fast, the thermal efficiency is high, oxidation
Scaling loss is lighter, and it is less to absorb gas, it can thus be avoided the problem of increasing sulphur and phosphorus.
Further, the surface roughness of torque arm is 2.5um in the SS05.
Further, in the SS05 detection hardness range of reinforcing rib in 130~180HBS.
The invention has the following advantages:
The present invention is designed by reasonable preparation process design and torsion rod structure, effectively improves the hardness of torque arm
With intensity and comprehensive performance, have the advantages of high mechanical resistant impact, high temperature resistant or low temperature, one-pass molding, high production efficiency,
With good application prospect.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of schematic perspective view of automobile torsion bar of the present invention；
Fig. 2 is the structural front view of Fig. 1；
Fig. 3 is the structure rearview of Fig. 1；
Fig. 4 is the cross-sectional view in Fig. 3 at A-A.
In attached drawing, parts list represented by the reference numerals are as follows:
1- lever arm, 2- connecting tube, 101- reinforcing rib, the first fillet of 102-, the second fillet of 103-, 104- third fillet.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
With reference to shown in attached drawing 1-4, a kind of automobile torsion bar, including lever arm 1 and the connection ring 2 for being set to 1 both ends of lever arm, bar
1 two sides of arm are that concave surface makes 1 cross section I-shaped of lever arm, and 1 one concave surface middle position of lever arm is provided with reinforcing rib 101, connection
Through-hole 201 is provided on ring 2 makes connection ring 2 form cylindrical annular configuration, and torque arm overall length 549.3mm, 2 outer diameter of connection ring is,
Internal diameter is 46.2mm, and 2 length of connection ring is 69.9mm, the centers of two connection rings away from for 488.5mm, lever arm 1 with a thickness of
44.4mm, 1 width 50.8mm of lever arm, 1 parallel surface of lever arm is with a thickness of 5.1mm, and 1 concave surface of lever arm is with a thickness of 4.8mm, Rib Thickness
For 6.4mm.
Wherein, the outer surface of 1 both ends of lever arm and 2 junction of connection ring is provided with the first fillet 102,1 both ends of lever arm and company
The inner surface for connecing 2 junction of ring is provided with the second fillet 103, and 101 both ends of reinforcing rib and 1 junction of lever arm are provided with third fillet
104, the first fillet 102 is R25.4mm, and the second fillet 103 is R6.4mm, and third fillet 104 is R3.2mm.
Wherein, a kind of manufacture craft of automobile torsion bar is main including the following steps:
SS01, melting and ingredient selection
Steel scrap, foundry returns and the pig iron, smelting furnace selection induction middle frequency furnace, the quality of ingredient are sequentially added in smelting furnace
Accounting are as follows: molten iron temperature is risen to 1350 DEG C and remove the slag on molten iron surface, base iron is taken to carry out by steel scrap 30%, the pig iron 70%
Chemical composition analysis adds ferrosilicon, manganese iron, requires adjustment as follows molten iron chemical composition: C3.9%~3.95%,
Si1.7%~1.8%, Mn < 0.25%, P < 0.06%, S < 0.03%, Cu < 0.05%, Sn < 0.06%, Cr < 0.06%, Ni <
0.06%；
SS02, nodularization and inoculation
Thermometric, molten iron temperature are 1420 DEG C~1450 DEG C progress spheroidization and inoculations, and inovulant selects FeSi75, nodulizer selection
Rare earth ferrosilicomagnesium nodulizer FeSiMg8Re7, inovulant FeSi75 are added in two portions, and an additional amount is 0.4%, secondary addition
Amount is 0.5%；Nodulizer additional amount is 1.25%~1.3%, and the nodularization time is 50~100s；
SS03, mulling, coremaking and moulding
It is mixed using clay and suitable water as the main binding agent of molding sand with silica sand, then makes and make master mold phase with torque arm
Master mold is fixed on model IFSI260 Ka Siding and covered on sand molding machine worktable, and iron core and master mold are matched by the iron core of cooperation
It closes, after penetrating sand machine clamps in place, sand is incident upon by the cavity between master mold and swage by penetrating sand machine sand-spraying hole, is penetrated after the completion of sand
Solidify 25~30s, it is to be solidified complete 30 seconds after molding, the swage type chamber of sand is covered after 25~30s of natural cooling above and below, will
After the upper mo(u)ld bottom half placement filter screen for having covered sand, mould assembling is clamped and is hung on pouring platform；
SS04, casting
The tapping temperature of molten iron is 1510 ± 10 DEG C, and the quality of molten iron discharging is 600 ± 10kg, and the cast temperature of molten iron is
1430 ± 10 DEG C, casting time < 8min, casting completion 15~after twenty minutes, the unpacking taking-up casting of sand mold is destroyed, each chemistry is obtained
Component are as follows: C3.85%, Si2.8%, Mn < 0.25%, P < 0.06%, S < 0.03%, Cu < 0.05%, Sn < 0.06%, Cr <
0.06%, the torque arm casting of Ni < 0.06%；
SS05, ball blast and polishing
Torque arm casting is subjected to ball blast and grinding process, processes fillet in ball blast and bruting process, and examine size,
Surface roughness and torque arm reinforcing rib hardness, obtain torque arm finished product, and the surface roughness of torque arm is 2.5um, reinforcing rib
101 detection hardness is 150HBS.
Embodiment two
A kind of automobile torsion bar, including lever arm 1 and the connection ring 2 for being set to 1 both ends of lever arm, 1 two sides of lever arm make for concave surface
1 cross section of lever arm is I-shaped, and 1 one concave surface middle position of lever arm is provided with reinforcing rib 101, is provided with through-hole in connection ring 2
201 make connection ring 2 form cylindrical annular configuration, and torque arm overall length 549.4mm, 2 outer diameter of connection ring is internal diameter 46.5mm, even
Connecing 2 length of ring is 69.9mm, and the centers of two connection rings is away from for 490mm, and lever arm 1 is with a thickness of 44.4mm, 1 width of lever arm
50.8mm, 1 parallel surface of lever arm is with a thickness of 5.3mm, and 1 concave surface of lever arm is with a thickness of 4.8mm, Rib Thickness 6.4mm.
Wherein, the outer surface of 1 both ends of lever arm and 2 junction of connection ring is provided with the first fillet 102,1 both ends of lever arm and company
The inner surface for connecing 2 junction of ring is provided with the second fillet 103, and 101 both ends of reinforcing rib and 1 junction of lever arm are provided with third fillet
104, the first fillet 102 is R25.4mm, and the second fillet 103 is R6.4mm, and third fillet 104 is R3.2mm.
Wherein, a kind of manufacture craft of automobile torsion bar is main including the following steps:
SS01, melting and ingredient selection
Steel scrap, foundry returns and the pig iron, smelting furnace selection induction middle frequency furnace, the quality of ingredient are sequentially added in smelting furnace
Accounting are as follows: molten iron temperature is risen to 1350 DEG C and remove the slag on molten iron surface, base iron is taken to carry out by steel scrap 30%, the pig iron 70%
Chemical composition analysis adds ferrosilicon, manganese iron, requires adjustment as follows molten iron chemical composition: C3.9%, Si1.75%,
Mn < 0.25%, P < 0.06%, S < 0.03%, Cu < 0.05%, Sn < 0.06%, Cr < 0.06%, Ni < 0.06%；
SS02, nodularization and inoculation
Thermometric, molten iron temperature are 1420 DEG C~1450 DEG C progress spheroidization and inoculations, and inovulant selects FeSi75, nodulizer selection
Rare earth ferrosilicomagnesium nodulizer FeSiMg8Re7, inovulant FeSi75 are added in two portions, and an additional amount is 0.4%, secondary addition
Amount is 0.5%；Nodulizer additional amount is 1.25%~1.3%, and the nodularization time is 50~100s；
SS03, mulling, coremaking and moulding
It is mixed using clay and suitable water as the main binding agent of molding sand with silica sand, then makes and make master mold phase with torque arm
Master mold is fixed on model IFSI260 Ka Siding and covered on sand molding machine worktable, and iron core and master mold are matched by the iron core of cooperation
It closes, after penetrating sand machine clamps in place, sand is incident upon by the cavity between master mold and swage by penetrating sand machine sand-spraying hole, is penetrated after the completion of sand
Solidify 25~30s, it is to be solidified complete 30 seconds after molding, the swage type chamber of sand is covered after 25~30s of natural cooling above and below, will
After the upper mo(u)ld bottom half placement filter screen for having covered sand, mould assembling is clamped and is hung on pouring platform；
SS04, casting
The tapping temperature of molten iron is 1510 ± 10 DEG C, and the quality of molten iron discharging is 600 ± 10kg, and the cast temperature of molten iron is
1430 ± 10 DEG C, casting time < 8min, casting completion 15~after twenty minutes, the unpacking taking-up casting of sand mold is destroyed, each chemistry is obtained
Component are as follows: C3.7%~3.95%, Si2.75%~2.85%, Mn < 0.25%, P < 0.06%, S < 0.03%, Cu < 0.05%,
Sn < 0.06%, Cr < 0.06%, Ni < 0.06% torque arm casting；
SS05, ball blast and polishing
Torque arm casting is subjected to ball blast and grinding process, process fillet in ball blast and bruting process and examine size,
Surface roughness and torque arm reinforcing rib hardness, obtain torque arm finished product, and the surface roughness of torque arm is 2.5um, reinforcing rib
101 detection hardness range is in 145HBS.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (7)
1. a kind of automobile torsion bar, including lever arm (1) and it is set to the connection ring (2) at lever arm (1) both ends, it is characterised in that: institute
Stating lever arm (1) two sides is that concave surface makes lever arm (1) cross section I-shaped, and (1) the one concave surface middle position of lever arm is provided with
Reinforcing rib (101), through-hole (201) is provided on the connection ring (2) makes connection ring (2) to form cylindrical annular configuration.
2. a kind of automobile torsion bar according to claim 1, which is characterized in that lever arm (1) both ends and connection ring (2)
The outer surface of junction is provided with the first fillet (102), and the inner surface at lever arm (1) both ends and connection ring (2) junction is set
It is equipped with the second fillet (103), reinforcing rib (101) both ends and lever arm (1) junction are provided with third fillet (104).
3. a kind of manufacture craft of automobile torsion bar as described in claim 1-2 is any one, which is characterized in that including following several
A step:
SS01, melting and ingredient selection
Steel scrap, foundry returns and the pig iron, the quality accounting of ingredient are sequentially added in smelting furnace are as follows: steel scrap 30%, the pig iron 70% will
Molten iron temperature rises to 1350 DEG C and removes the slag on molten iron surface, takes base iron to carry out chemical composition analysis, adds ferrosilicon, manganese
Molten iron chemical composition is required adjustment as follows by iron: C3.9%~3.95%, Si1.7%~1.8%, Mn < 0.25%, P <
0.06%, S < 0.03%, Cu < 0.05%, Sn < 0.06%, Cr < 0.06%, Ni < 0.06%；
SS02, nodularization and inoculation
Thermometric, molten iron temperature are 1420 DEG C~1450 DEG C progress spheroidization and inoculations, and inovulant selects FeSi75, and nodulizer selects rare earth
Magnesium ferrosilicon nodulizer FeSiMg8Re7, inovulant FeSi75 are added in two portions, and one time additional amount is 0.4%, and secondary additional amount is
0.5%；Nodulizer additional amount is 1.25%~1.3%, and the nodularization time is 50~100s；
SS03, mulling, coremaking and moulding
It is mixed using clay and suitable water as the main binding agent of molding sand with silica sand, then makes and matched with torque arm production master mold
Iron core, master mold is fixed on penetrating sand machine workbench, and iron core and master mold are cooperated, after penetrating sand machine clamps in place, is passed through
Sand is incident upon the cavity between master mold and swage by penetrating sand machine sand-spraying hole, penetrates 25~30s of solidification after the completion of sand, completion to be solidified 30 seconds
The swage type chamber of sand is covered in molding afterwards after 25~30s of natural cooling above and below, after the upper mo(u)ld bottom half for having covered sand is placed filter screen,
Mould assembling is clamped and is hung on pouring platform；
SS04, casting
The tapping temperature of molten iron is 1510 ± 10 DEG C, and the quality of molten iron discharging is 600 ± 10kg, the cast temperature of molten iron is 1430 ±
10 DEG C, casting time < 8min, casting completion 15~after twenty minutes, the unpacking taking-up casting of sand mold is destroyed, each chemical constituent is obtained
Are as follows: C3.7%~3.95%, Si2.75%~2.85%, Mn < 0.25%, P < 0.06%, S < 0.03%, Cu < 0.05%, Sn <
0.06%, the torque arm casting of Cr < 0.06%, Ni < 0.06%；
SS05, ball blast and polishing
Torque arm casting is subjected to ball blast and grinding process, and examines size, surface roughness and torque arm reinforcing rib hardness, is obtained
To torque arm finished product.
4. a kind of automobile torsion bar according to claim 3 and its manufacture craft, which is characterized in that the type of the penetrating sand machine
Number sand molding machine is covered for IFSI260 Ka Siding.
5. a kind of automobile torsion bar according to claim 3 and its manufacture craft, which is characterized in that the smelting furnace selection
Incude middle frequency furnace, its advantage is that heating speed is fast, the thermal efficiency is high, and oxidization burning loss is lighter, and it is less to absorb gas, therefore, can be with
It avoids the problem that increasing sulphur and phosphorus.
6. a kind of automobile torsion bar according to claim 3 and its manufacture craft, which is characterized in that torsion in the SS05
The surface roughness of bar is 2.5um.
7. a kind of automobile torsion bar according to claim 3 and its manufacture craft, which is characterized in that reinforce in the SS05
The detection hardness range of muscle is in 130~180HBS.
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