A kind of casting technique of brake block and its steel back
Technical field
The present invention relates to auto parts and components field, the casting technique of more particularly to a kind of brake block and its steel back.
Background technology
Brake block be automobile brake system in most critical breaking piece, the quality of all braking effects is all brake block
Play a decisive role, so the brake block for agreeing is people and the patron saint of automobile.The fine or not key of brake block is to see whether it has
One rational coefficient of friction, anti-wear performance, existing brake block typically use forging technology, and the brake block forged easily has
The unqualified situation such as slight crack, causes defect rate high, and radiating effect is poor, and service life is short.
The content of the invention
The invention aims to provide the casting technique of a kind of brake block and its steel back, it can be stopped by casting technique manufacture
Car piece steel back, the brake block steel back one-shot forming made, wearability, frictional behaviour are superior, and service life is long.
To solve the above problems, the present invention provides a kind of brake block, including friction material, bed material, bonded adhesives, steel back and disappear
Sound-absorbing layer, described bed material side is provided with friction material, and opposite side is provided with bonded adhesives, and steel back is bonded on bed material by bonded adhesives,
The opposite side of steel back is provided with noise reduction layer;Steel back includes steel back body, and the back side of steel back body is provided with wire nail, and wire nail is a diameter of
7-15mm, the high 2-4mm of wire nail, the wire nail and steel back this body disposable casting.
Further, the mounting hole that spring installs ear and fixed spring, steel are additionally provided with described steel back body
The front of back of the body body is additionally provided with convex closure.
The present invention also provides a kind of casting technique of brake block steel back, first, the mould of associated shape is manufactured, then by mould
Tool is installed, and then manufactures formwork, is confirmed that formwork is intact, is adjusted mould shell temperature to 200-240 DEG C, firmly according to formwork thickness
75-90 seconds change time, confirm to assemble formwork after formwork is intact, it is desirable to per 20-25 layers of rudder;Base, upper lid are flat with what is processed
Whole backing plate, is subject to fastened by screw, installs sprue cup;
Castiron Melting:The cast iron of correlation type is chosen according to technological requirement, melting, charging to fire door 20 are carried out using electric furnace
During~30cm, first time slagging-off need to be carried out, while measuring molten iron temperature;
Being melt into after molten iron makes its phosphorus content be 3.8~3.9%, and silicon content is 1.8~1.9%, while being heated up;
Molten iron temperature is reached after 1530~1540 DEG C, you can power failure is come out of the stove:To the nodularization bag equipped with 12~13kg nodulizers
In topple over molten iron, 3~4kg iron end and silicon grain are covered above nodulizer, delays nodularization process, increase molten iron and nodulizer etc. connect
The time of touching, molten iron is just contacted after pouring into 10% with nodulizer and react, while breed for the first time;20s domestic demands are fallen
Enter about 70% molten iron, after 60s~80s is boiled to, reaction terminates, then pours into remaining 30% molten iron, during pouring into
Carry out current-following inoculation and continue stirring, make its fast melt;
A deslagging agent is added to carry out secondary slagging-off, anti-non-return sulphur phenomenon again before casting;
, will when toppling over by molten iron from great Bao pours into parcel by the quick handling of molten iron to mo(u)lding line casting platform during casting
Carry out third time to breed, inovulant is added with stream, wherein adding mass fraction breeding for 0.05%-0.1% in molten iron per ton
Agent, then by the steady injection type chamber running channel of molten iron in parcel, each parcel molten iron can just cast a pile steel back;Casting temperature
Degree control is 21-25 second at 1430-1450 DEG C, per the pile duration of pouring, and per stove molten iron, from starting to be cast to, end is time-consuming needs to control
System was at 6~8 minutes, to prevent decaying spheroidisation.
Further, a diameter of 1m of described nodularization bag, height 1.8m, capacity 1t.
Further, described nodulizer main component is 44% silicon, and described nodulizer also includes rare earth and magnesium, dilute
Soil is used for removing slag, and magnesium is used for desulfuration, and the carbon of meeting scaling loss about 0.1%, makes carbon content reduce to 3.7~3.8% during nodularization;Increase
Plus about 1% silicon, silicone content is reached 2.8~2.9%, wherein nodulizer increases silicon about 0.4%, inovulant increases silicon about 0.6%.
Further, described inovulant is 3~4kg, 3~8mm silicon grain, and wherein each component mass fraction is 70%
Silicon, 4~6% barium, wherein 1.5%~2.5% calcium, barium can delay liquid iron balling to fail with calcium.
After such design, the present invention at least has advantages below:
The brake block structure of the application is simple, brake block steel back and the disposable casting of wire nail, toughness high with intensity
Good with wearability, good, the performance of perfect heat-dissipating of shearing property can increase the performance of brake block, braking effect is good, yield rate
Height, reduces cost.
Brief description of the drawings
Above-mentioned is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, below
With reference to accompanying drawing, the present invention is described in further detail with embodiment.
Fig. 1 is the structural representation of the brake block of the present invention.
Fig. 2 is the structure schematic diagram of the steel back of the present invention.
Fig. 3 is the positive structure schematic of steel back
Wherein, 1 is friction material, and 2 be bed material, and 3 be bonded adhesives, and 4 be steel back, and 5 be noise reduction layer, and 6 be wire nail, and 7 be spring
Bar installs ear, and 8 be the mounting hole of fixed spring, and 9 be convex closure.
Embodiment
Shown in reference picture 1-3, the present invention provides a kind of brake block, including friction material 1, bed material 2, bonded adhesives 3, steel back 4
With noise reduction layer 5, the described side of bed material 2 is provided with friction material 1, and opposite side is provided with bonded adhesives 3, and steel back 4 is bonded by bonded adhesives 3
On bed material 2, the opposite side of steel back is provided with noise reduction layer 5;Steel back includes steel back body, and the back side of steel back body is provided with wire nail 6,
The a diameter of 7-15mm of wire nail, the high 2-4mm of wire nail 6, the wire nail 6 and steel back this body disposable casting.
Preferably, the mounting hole 8 that spring installs ear 7 and fixed spring, steel are additionally provided with described steel back body
The front of back of the body body is additionally provided with convex closure 9.
The present invention also provides a kind of steel back casting technique of brake block, first, the mould of associated shape is manufactured, then by mould
Tool is installed, and then manufactures formwork, is confirmed that formwork is intact, is adjusted mould shell temperature to 200-240 DEG C, firmly according to formwork thickness
75-90 seconds change time, confirm to assemble formwork after formwork is intact, it is desirable to per 20-25 layers of rudder;Base, upper lid are flat with what is processed
Whole backing plate, is subject to fastened by screw, installs sprue cup;
Castiron Melting:The cast iron of correlation type is chosen according to technological requirement, melting, charging to fire door 20 are carried out using electric furnace
During~30cm, first time slagging-off need to be carried out, while measuring molten iron temperature;
Being melt into after molten iron makes its phosphorus content be 3.8~3.9%, and silicon content is 1.8~1.9%, while being heated up;
Molten iron temperature is reached after 1530~1540 DEG C, you can power failure is come out of the stove:To the nodularization bag equipped with 12~13kg nodulizers
In topple over molten iron, 3~4kg iron end and silicon grain are covered above nodulizer, delays nodularization process, increase molten iron and nodulizer etc. connect
The time of touching, molten iron is just contacted after pouring into 10% with nodulizer and react, while breed for the first time;20s domestic demands are fallen
Enter about 70% molten iron, after 60s~80s is boiled to, reaction terminates, then pours into remaining 30% molten iron, during pouring into
Carry out current-following inoculation and continue stirring, make its fast melt;
A deslagging agent is added to carry out secondary slagging-off, anti-non-return sulphur phenomenon again before casting;
, will when toppling over by molten iron from great Bao pours into parcel by the quick handling of molten iron to mo(u)lding line casting platform during casting
Carry out third time to breed, inovulant is added with stream, wherein adding mass fraction breeding for 0.05%-0.1% in molten iron per ton
Agent, then by the steady injection type chamber running channel of molten iron in parcel, each parcel molten iron can just cast a pile steel back;Casting temperature
Degree control is 21-25 second at 1430-1450 DEG C, per the pile duration of pouring, and per stove molten iron, from starting to be cast to, end is time-consuming needs to control
System was at 6~8 minutes, to prevent decaying spheroidisation.
Preferably, a diameter of 1m of described nodularization bag, height 1.8m, capacity 1t.
Nodulizer main component is 44% silicon, in addition to rare earth and magnesium, rare earth are used for removing slag, and magnesium is used for desulfuration, nodularization
During can scaling loss about 0.1% carbon, carbon content is reduced to 3.7~3.8%;The silicon of increase about 1%, reaches silicone content
2.8~2.9%, wherein nodulizer increases silicon about 0.4%, and inovulant increases silicon about 0.6%.
Inovulant is 3~4kg, 3~8mm silicon grain, and wherein each component mass fraction is 70% silicon, 4~6% barium, 1.5%
~2.5% calcium, wherein barium can delay liquid iron balling to fail with calcium.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, this
Art personnel make a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all fall within this hair
In bright protection domain.