CN208619565U - Brake caliper piston after a kind of - Google Patents
Brake caliper piston after a kind of Download PDFInfo
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- CN208619565U CN208619565U CN201821252463.7U CN201821252463U CN208619565U CN 208619565 U CN208619565 U CN 208619565U CN 201821252463 U CN201821252463 U CN 201821252463U CN 208619565 U CN208619565 U CN 208619565U
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Abstract
The utility model discloses a kind of rear brake caliper pistons, it is good to be intended to provide a kind of structural strength, brake caliper piston after being easy to radiate and is anti abrasive, its key points of the technical solution are that including piston only, the piston only includes the first main body and the second main body being connected, the axle center of second main body is equipped with multi-segment structure and runs through the stepped hole of the second main body, one end of first the second main body of main body face is equipped with the inner hole being connected to stepped hole, first main body is additionally provided with radiating groove on one end of the second main body, with the symmetrically arranged location hole in axle center there are two being set on the slot bottom of radiating groove, the periphery wall of first main body is equipped with the card slot of ring structure and the air discharge duct of ring structure, air discharge duct is equipped with the gas vent being connected to inner hole, second main body is equipped with several microcellular structures, several micropores form the oil circuit of connection the second main body inner wall and outer wall Channel, stepped hole are equipped with reservoir far from one end of inner hole, and the utility model is suitable for piston technical field.
Description
Technical field
The utility model belongs to piston technical field, refers in particular to a kind of rear brake caliper piston.
Background technique
Brake caliper piston is mainly used in brake afterwards, and the outer end of rear brake caliper piston has brake strip, for
Brake disc friction catch is normally filled with brake fluid in brake, for the reciprocating motion of brake caliper piston after driving, therefore needs
Good wear-resisting property and intensity are wanted, and existing rear brake caliper piston is forging, in order to ensure the wearability of outer surface, is needed
Electroplating processes are carried out in outer surface, but, not enough environmental protection very harmful to annular is electroplated.
Utility model content
That the purpose of the utility model is to provide a kind of structural strengths is good, be easy to radiate and is anti abrasive after brake caliper piston.
Purpose of the utility model is realized as follows: brake caliper piston after a kind of, including piston only, feature exist
In: the piston only include the first main body and the second main body being connected, the axle center of the second main body be equipped with multi-segment structure and
Through the stepped hole of the second main body, one end of first the second main body of main body face is equipped with the inner hole being connected to stepped hole, and first
Main body away from the second main body one end on be additionally provided with radiating groove, set on the slot bottom of radiating groove there are two with axle center it is symmetrically arranged fixed
Position hole, the periphery wall of the first main body are equipped with the card slot of ring structure and the air discharge duct of ring structure, air discharge duct be equipped with it is interior
The gas vent of hole connection, the second main body are equipped with several microcellular structures, and several micropores form the second main body inner wall of connection and outer wall
Asphalt channel, stepped hole far from inner hole one end be equipped with oil storage annular groove.
The utility model is further arranged to: the bottom hole of the inner hole be equipped with cushion, stepped hole close to inner hole one
End is equipped with sealing ring.
The utility model is further arranged to: first main body is additionally provided with several wear-resisting on one end of the second main body
Protrusion.
The manufacturing process of brake caliper piston after a kind of, characterized by the following steps:
One, ingredient: it is matched according to parts by weight are as follows: 100 parts of iron powder, 5-15 parts of aluminium powder, 3-5 parts of zinc powder, molybdenum powder 1-2
Part, is modified copper powder 1-2 parts, 2-3 parts of lubricant at 2-3 parts of Paris white, 2-3 parts of graphite powder；
Two, mixing: iron powder, aluminium powder and zinc powder first being put into batch mixer and are stirred 5 minutes, whipping temp 70-80
DEG C, molybdenum powder, Paris white, graphite powder and modified copper powder were sequentially added every two minutes later, finally adds lubricant stirring
10 minutes.
Three, it suppresses: mixed-powder is fitted into mold, compacting is in green compact；
Four, it is sintered: green compact is pre-sintered under the protection of non-oxidizing gas, the temperature of pre-sintering is 400-450
DEG C, sintering time is 1.5 hours, then carries out high temperature sintering again, and the temperature of high temperature sintering is 1100-1200 DEG C, sintering time
It is 2 hours, the metallurgical part of formation, air-cooled later to 500-600 DEG C, and wherein one end of metallurgical part is immersed in normal-temperature water and carries out water
Cold, immersion depth is 2/5ths of metallurgical part height, in water cooling 3 seconds after pull out, continue air-cooled；
Five, roughing: roughing is carried out by parameter request；
Six, immersion liquid: one end of the dipped water of metallurgical part being put into molten aluminum and is impregnated, and aluminium liquid height is five points of metallurgical part height
Two, cooling is pulled in immersion out after five minutes, so that one end of the metallurgical dipped molten aluminum of part is the first main body, one end of not dipped molten aluminum
For the second main body；
Seven, it is heat-treated: piston semi-finished product being sent into tempering furnace and are tempered 2 hours, tempering temperature is 350-400 DEG C, and keeps the temperature 2
Hour, put into the first oil groove later and carry out one section of quenching, the oil temperature of the first oil groove is 120-150 DEG C, then put into the second oil groove into
Two sections of row quenchings, the oil temperature of the second oil groove are 30-35 DEG C, finally carry out gas nitriding processing；
Nine, piston finishing: is subjected to finishing, finished product.
The utility model is further arranged to: the iron powder is mixed by reduced iron powder and atomized iron powder 4:1 in parts by weight
It is made.
The utility model is further arranged to: the lubricant includes polytetrafluoroethylene (PTFE), silicone oil and carbon black, by weight
Several ratio is 1:3:1.
It has the following advantages that by using above-mentioned technical proposal, by the setting of radiating groove and wear-resisting protrusion, can be improved
Thermal diffusivity；By opening up microcellular structure in the second main body, the second body outer surface can be made to have the effect of self-lubricating, it is wear-resisting
Property greatly improves；By the above-mentioned manufacture method, the intensity, hardness and wearability of piston are substantially increased, and process is relatively simple,
Electroplating technology is eliminated, it is more environmentally-friendly.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the left view structural representation of the utility model Fig. 1；
Appended drawing reference in figure are as follows: the 1, first main body；2, the second main body；3, stepped hole；4, inner hole；5, radiating groove；6, it positions
Hole；7, card slot；8, air discharge duct；9, gas vent；10, reservoir；11, cushion；12, sealing ring；13, wear-resisting protrusion.
Specific embodiment
The utility model is further described with specific embodiment with reference to the accompanying drawing, referring to Fig. 1-2:
Brake caliper piston after a kind of, including piston only, it is characterised in that: the piston only includes first to be connected
The axle center of main body 1 and the second main body 2, the second main body 2 is equipped with multi-segment structure and runs through the stepped hole 3 of the second main body 2, and first is main
One end of 1 the second main body of face 2 of body is equipped with the inner hole 4 being connected to stepped hole 3, and the first main body 1 deviates from one end of the second main body 2
On be additionally provided with radiating groove 5, set on the slot bottom of radiating groove 5 there are two with the symmetrically arranged location hole 6 in axle center, the first main body 1 it is outer
Peripheral wall is equipped with the card slot 7 of ring structure and the air discharge duct 8 of ring structure, and air discharge duct 8 is equipped with the gas vent being connected to inner hole 4
9, the second main body 2 is equipped with several microcellular structures, and several micropores form the asphalt channel of connection 2 inner and outer wall of the second main body,
Stepped hole 3 is equipped with reservoir 10 far from one end of inner hole 4.
Stepped hole 3 is connected to form piston hole with inner hole 4, and piston hole with the detent fit of brake for connecting, and first
One end that main body 1 is equipped with radiating groove 5 is the outer end face of the first main body 1, and for contradicting with friction plate, the setting of radiating groove 5 can
To accelerate the heat dissipation between the first main body 1 and friction plate, the setting of location hole 6 can cooperate with friction plate, avoid friction plate opposite
The rotation of first main body 1, plays the role of anti-rotation, gas vent 9 can guarantee the balance of the external and internal pressure of piston hole, air discharge duct 8
Setting may insure capacity, and gas vent 9 is avoided to block, and the second main body 2 is formed by metal powder sintered, have porous knot
Structure, the asphalt channel formed by microcellular structure, so that the brake fluid in brake is permeable to the outer surface of the second main body 2
On, reservoir 10 can increase the brake fluid reserves in stepped hole 3, convenient for accelerate piston hole in brake fluid and piston only it is micro-
The infiltration cycles of brake fluid in hole, play the effect of better lubrication cooling, when operating, due in piston only and brake
Plunger shaft between rub and generate heat, 2 outer surface heat of the second main body expansion overflow brake fluid, lubricating action can be played, when
When stopping working, piston only is cooling, and the brake fluid in brake can be inhaled into again in the hole of the second ontology, realizes from profit
It is sliding, the abrasion of piston only is reduced, the service life of piston only is extended.
The bottom hole of the inner hole 4 is equipped with cushion 11, and stepped hole 3 is equipped with sealing ring 12 close to one end of inner hole 4, delays
Play the role of elastic buffer between punching 11 pairs of positioning pins of pad and inner hole 4, avoids in piston only motion process directly in positioning
Pin generates collision and damages, and when piston only and fixed positioning pin installation, sealing ring 12 can play sealing function, keep away
Exempt from brake oil flow inner hole 4 and is flowed out from gas vent 9.
First main body 1 is additionally provided with several wear-resisting raised 13 on one end of the second main body 2, and wear-resisting raised 13 make
There are gap between the outer end face and friction plate of first main body 1, the heat in radiating groove 5 can be flowed out along gap, be further functioned as
The effect of heat dissipation.
The manufacturing process of brake caliper piston after a kind of, characterized by the following steps:
One, ingredient: it is matched according to parts by weight are as follows: 100 parts of iron powder, 5-15 parts of aluminium powder, 3-5 parts of zinc powder, molybdenum powder 1-2
Part, is modified copper powder 1-2 parts, 2-3 parts of lubricant at 2-3 parts of Paris white, 2-3 parts of graphite powder；
Two, mixing: iron powder, aluminium powder and zinc powder first being put into batch mixer and are stirred 5 minutes, whipping temp 70-80
DEG C, molybdenum powder, Paris white, graphite powder and modified copper powder were sequentially added every two minutes later, finally adds lubricant stirring
10 minutes.
Three, it suppresses: mixed-powder is fitted into mold, compacting is in green compact；
Four, it is sintered: green compact is pre-sintered under the protection of non-oxidizing gas, the temperature of pre-sintering is 400-450
DEG C, sintering time is 1.5 hours, then carries out high temperature sintering again, and the temperature of high temperature sintering is 1100-1200 DEG C, sintering time
It is 2 hours, the metallurgical part of formation, air-cooled later to 500-600 DEG C, and wherein one end of metallurgical part is immersed in normal-temperature water and carries out water
Cold, immersion depth is 2/5ths of metallurgical part height, in water cooling 3 seconds after pull out, continue air-cooled；
Five, roughing: the contour structures such as stepped hole 3, inner hole 4, air discharge duct 8, location hole 6 slightly add by parameter request
Work molding；
Six, immersion liquid: one end of the dipped water of metallurgical part being put into molten aluminum and is impregnated, and aluminium liquid height is five points of metallurgical part height
Two, cooling is pulled in immersion out after five minutes, so that one end of the metallurgical dipped molten aluminum of part is the first main body 1, one end of not dipped molten aluminum
For the second main body 2；
Eight, it is heat-treated: piston semi-finished product being sent into tempering furnace and are tempered 2 hours, tempering temperature is 350-400 DEG C, and keeps the temperature 2
Hour, put into the first oil groove later and carry out one section of quenching, the oil temperature of the first oil groove is 120-150 DEG C, then put into the second oil groove into
Two sections of row quenchings, the oil temperature of the second oil groove are 30-35 DEG C, finally carry out gas nitriding processing；
Nine, piston finishing: is subjected to finishing and finishing shape, finished product；
Using iron powder as original washing powder, intensity is good but at low cost；Aluminium powder can increase the thermal conductivity of piston, be easy to the heat dissipation of piston；
The antirust and resistance to atmospheric corrosion of piston can be improved in zinc powder；Molybdenum powder can increase the wearability and its intensity of piston；Calcium carbonate
Powder and graphite powder can further increase the wearability of piston；Modified copper powder passes through organic compound original position table by nano-scale copper powder
Face modification has good wear-resistant repair, further increases wear-resisting property；Lubricant can play further profit
Sliding wear-resisting effect.
It selects above-mentioned reasonable proportion and orderly carries out mixing treatment, it can be ensured that the structural strength of final obtained piston,
Hardness, thermal conductivity and its wearability.
In sintering process, using double sintering, i.e. pre-sintering and high temperature sintering, it can be increased by way of pre-sintering and be subtracted
Small pore size, but hole quantity can be improved, keep its porous but structural strength is good；It is carried out by the way of air-cooled after high temperature sintering
Pre- cooling, can reduce residual stress, and Reducing distortion and line split tendency, and water in normal-temperature water is immersed in one end of metallurgical part later
Cold, i.e. the first main body 1 immerses in water cooling, improves its hardness, but the immersion time is shorter, the inside of the first main body 1 and the second main body 2
Portion fails whole coolings, still there is good toughness, finally continues air-cooled, further eliminates residual stress.
Since the first main body 1 is after the quenching of water, the pre-cooling of 1 surface powder of the first main body can generate contraction, and hole is anti-
And will increase, after leaching molten aluminum processing, molten aluminum can be easier to infiltrate into the surface of metallurgical part, block the hole on metallurgical part surface
Gap so that the outer surface of the first main body 1 be sealing structure, avoid brake fluid and ooze out and leak outward, due to soaking time compared with
Short, penetration depth is between 1.5-2mm, and the inside of the first main body 1 can also be there are hole, and hole can accelerate the first main body 1
The heat dissipation at place, i.e., so that the first main body 1 forms the double-layer structure including outer sealing layers and inner hole gap layer, furthermore in actual use,
Brake fluid can infiltrate into the hole of the first main body 1 with the hole of the second main body 2, and due to 1 outer wall of the first main body in using
Temperature can be higher than the temperature of inner hole 4, therefore brake fluid can't ooze out from the inner wall of inner hole 4, and the hole of the second main body 2 and
Infiltration between the hole of first main body 1 can make brake fluid alternately strike flow and cool down.
The metallurgical part height referred in water cooling and immersion liquid refers to the axial length of piston, due to using middle piston motion stroke
About 2/5ths of piston axial length, therefore its immersion depth is preferably also 2/5ths, and due to the infiltration of water and molten aluminum
Thoroughly, practical immersion depth can be slightly larger than 2/5ths of axial length, it is ensured that and one end that piston stretches out plunger shaft is sealed end,
Brake fluid is avoided to exosmose.
Tempering is carried out when heat treatment and two sections of quenching treatments, the residual stress generated when further eliminating workpiece water cooling are prevented
It only deforms and cracks, and adjust the final hardness and its wearability of piston, keep its performance more excellent.
Wherein when roughing, other contour structures can leading roughing, but gas vent 9 needs carried out in finishing procedure
Processing avoids water or molten aluminum when water cooling or immersion liquid from flowing into inner hole 4.
The iron powder is mixed by reduced iron powder and atomized iron powder 4:1 in parts by weight, and reduced iron powder particle is bigger, pressure
It is more loose after system, but easy-sintering and the hole sintered into it is big, atomized iron powder particle is small, and sintered structural strength is good, but hole
Gap is small, and at high cost, therefore using the mixing match of upper 4:1 mixing, not only can guarantee sintered structural strength, but also can guarantee shape
At preferable hole.
The lubricant includes polytetrafluoroethylene (PTFE), silicone oil and carbon black, and ratio in parts by weight is 1:3:1, lubricant
Addition can convenient for demoulding and piston wearability, and by the rational proportion effect of a variety of lubricants will far it is good
In single lubricant, and the addition of silicone oil is mixed and is bonded convenient for reduced iron powder and the uniform of atomized iron powder, so that piston
It can be more excellent.
Using above-mentioned identical manufacturing process, formed according to the proportion of assistant ingredients following with embodiment:
Embodiment one:
Ingredient: it is matched according to parts by weight are as follows: 100 parts of iron powder, 5 parts of aluminium powder, 3 parts of zinc powder, 1 part of molybdenum powder, Paris white 2
Part, 2 parts of graphite powder, modified 1 part of copper powder, 2 parts of lubricant；
Embodiment two:
Ingredient: it is matched according to parts by weight are as follows: 100 parts of iron powder, 15 parts of aluminium powder, 5 parts of zinc powder, 2 parts of molybdenum powder, Paris white
3 parts, 3 parts of graphite powder, modified 2 parts of copper powder, 3 parts of lubricant；
Embodiment three:
Ingredient: it is matched according to parts by weight are as follows: 100 parts of iron powder, 10 parts of aluminium powder, 3 parts of zinc powder, 1 part of molybdenum powder, Paris white
2 parts, 2 parts of graphite powder, modified 1 part of copper powder, 2 parts of lubricant；
Experimental Comparison is carried out to above three embodiments:
Hardness: one > embodiment of embodiment, two > embodiment three；
Wearability: two > embodiment of embodiment, one > embodiment three；
Thermal conductivity: two > embodiment of embodiment, three > embodiment one.
Above-described embodiment is only the preferred embodiment of the utility model, not limits the protection model of the utility model according to this
It encloses, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by the protection of the utility model
Within the scope of.
Claims (3)
1. brake caliper piston after a kind of, including piston only, it is characterised in that: the piston only includes the first master being connected
The axle center of body (1) and the second main body (2), the second main body (2) is equipped with multi-segment structure and runs through the stepped hole of the second main body (2)
(3), one end of the first main body (1) the second main body of face (2) is equipped with the inner hole (4) being connected to stepped hole (3), the first main body
(1) away from the second main body (2) one end on be additionally provided with radiating groove (5), set on the slot bottom of radiating groove (5) there are two with axle center it is symmetrical
The location hole (6) of setting, the periphery wall of the first main body (1) are equipped with the air discharge duct of card slot (7) and ring structure of ring structure
(8), air discharge duct (8) is equipped with the gas vent (9) being connected to inner hole (4), and the second main body (2) is equipped with several microcellular structures, if
Dry micropore forms the asphalt channel of connection the second main body (2) inner and outer wall, sets on one end of stepped hole (3) separate inner hole (4)
There are reservoir (10).
2. a kind of rear brake caliper piston according to claim 1, it is characterised in that: the bottom hole of the inner hole (4) is equipped with
Cushion (11), stepped hole (3) are equipped with sealing ring (12) close to the one end of inner hole (4).
3. a kind of rear brake caliper piston according to claim 1, it is characterised in that: first main body (1) deviates from second
Several wear-resisting raised (13) are additionally provided on one end of main body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821252463.7U CN208619565U (en) | 2018-08-04 | 2018-08-04 | Brake caliper piston after a kind of |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821252463.7U CN208619565U (en) | 2018-08-04 | 2018-08-04 | Brake caliper piston after a kind of |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208619565U true CN208619565U (en) | 2019-03-19 |
Family
ID=65708838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821252463.7U Active CN208619565U (en) | 2018-08-04 | 2018-08-04 | Brake caliper piston after a kind of |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208619565U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953430A (en) * | 2018-08-04 | 2018-12-07 | 台州大昌汽车部件有限公司 | Brake caliper piston and its processing technology after a kind of |
-
2018
- 2018-08-04 CN CN201821252463.7U patent/CN208619565U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953430A (en) * | 2018-08-04 | 2018-12-07 | 台州大昌汽车部件有限公司 | Brake caliper piston and its processing technology after a kind of |
| CN108953430B (en) * | 2018-08-04 | 2024-03-19 | 大昌汽车部件股份有限公司 | Rear brake caliper piston and processing technology thereof |
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| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: 317600 No. 1 Qiantangyuan South Road, Yucheng Street, Yuhuan City, Taizhou City, Zhejiang Province Patentee after: Dachang Automobile Parts Co., Ltd. Address before: 317600 No. 1 Qiantangyuan South Road, Yucheng Street, Yuhuan County, Taizhou City, Zhejiang Province Patentee before: Taizhou Dachang Auto Parts Co. Ltd. |