A kind of automobile torsion bar and its manufacture craft
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.