CN104588581A - Manufacturing method of brake drum - Google Patents
Manufacturing method of brake drum Download PDFInfo
- Publication number
- CN104588581A CN104588581A CN201510027777.1A CN201510027777A CN104588581A CN 104588581 A CN104588581 A CN 104588581A CN 201510027777 A CN201510027777 A CN 201510027777A CN 104588581 A CN104588581 A CN 104588581A
- Authority
- CN
- China
- Prior art keywords
- shell mould
- sand
- sandbox
- brake drum
- patrix
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C13/00—Moulding machines for making moulds or cores of particular shapes
- B22C13/08—Moulding machines for making moulds or cores of particular shapes for shell moulds or shell cores
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
The invention discloses a manufacturing method of a brake drum. The manufacturing method mainly comprises the following steps: respectively manufacturing an upper mould shell model, a lower mould shell model and a sprue cup shell model on a core shooting machine, then assembling to form an integral film-coated sand shell model; placing a sand box on a ramming platform; putting dried sand into the sand box, and ramming to form a bottom sand layer; placing the assembled film-coated sand shell model into the sand box, putting the dried sand into the sand box, and ramming; coating a back film, vacuumizing; and pouring, releasing a negative pressure, opening the box, drawing and removing a casting head of a casting of the brake drum. The manufacturing method achieves the characteristic of combining advantages of two processes by combining a V-method casting process and a film-coated sand shell model casting process.
Description
Technical field
The present invention relates to casting technology field, be specifically related to a kind of brake drum manufacture method.
Background technology
Present stage, the main casting technique of automobile brake drum blank had:
1, V method casting technique: the casting of V method utilizes plastic sheeting to seal sandbox, by air in vacuum-pumping system extraction type, pressure differential is had inside and outside casting mold, make dry sand closely knit, there is needed for formation the die cavity of some strength, vacuumize make casting solidification through lower core, mould assembling, cast, remove negative pressure, molding sand is thereupon defeated and dispersed and obtain foundry goods.
This explained hereafter cast(ing) surface is out bright and clean, clear-cut, uniform in material, being different from traditional sand casting great advantage is do not use binding agent, greatly alleviate sand work for the treatment of, the amount of labour of foundry goods scab cleaning also greatly reduces, the old sand rate of recovery can reach more than 95%, is applicable to multi items single and mini-batch production and production in enormous quantities.
2, resin-coated sand shell mould casting technique: resin-coated sand shell mould casting be with the molding sand (sand in coating phenolic resin) that a kind of heat is hardened cover be heated to 180 ~ 280 DEG C metal form on, it is made to be hardened to shell (shell thickness is generally 6 ~ 12 millimeters), heating cure shell again, make to reach enough strength and stiffness, therefore by upper and lower two panels shell fixture clamping or after cementing with resin, casting mold can be formed without sandbox.
This art shapes is convenient, fast, does not need to brush any coating, thus the foundry goods clear-cut obtained, any surface finish, size is accurate, can process on a small quantity without machining or only.Therefore shell moulded casting is specially adapted to the foundry goods of the various alloys that production lot is comparatively large, dimension precision requirement is high, wall is thin and complex-shaped, is applicable to overall size and produces in enormous quantities compared with the single-piece of miscellaneous goods.
3, Sand-Faced Metal Mould Casting technique: Sand-Faced Metal Mould Casting technique adopts metal pattern---press mold (therefore being sometimes also device for sand coated iron mould Iron mold coated sand) and with the cast iron die cavity of the nearly shape of foundry goods profile as sandbox swage, the precoated sand close-over formation casting mold swage of nearly shape covering one deck 6-10 ㎜ is used for pouring into foundry goods.
Sand-Faced Metal Mould Casting has the feature of resin-coated sand shell mould casting, and moulding is convenient, does not need to brush any coating.Both obtain bright and clean foundry goods, turn improve the form and dimensional precision of foundry goods.In addition, Sand-Faced Metal Mould Casting also has the feature of permanent mold casting, the casting mold of iron has obvious cold shock effect in molten metal crystallization process, the refinement of casting crystalline grain degree can be made, thus improve the comprehensive strength of foundry goods, the weakness simultaneously again owing to there being the existence of close-over to avoid permanent mold casting, foundry goods can not produce spoken parts in traditional operas, for ironcasting, as cast condition various material can be produced, without the need to heat treatment.
4, clay wet sand casting technique: the main binding agent that clay wet sand casting is molding sand with clay and appropriate water, direct mould assembly and cast under hygrometric state after making sand mold.
The advantage of clay wet sand casting is: the aboundresources of clay, low price; Used clay damp sand is after suitable sand process, and the overwhelming majority is all recyclable to be used again; The cycle of manufacture casting mold is short, work efficiency is high; The mixed molding sand spendable time is long; Sand mold is pounded still can hold in fact later and is out of shape and unlikely destruction on a small quantity.
Any one process has its uniqueness also just to have its limitation, and V method casting technique, resin-coated sand shell mould casting technique, Sand-Faced Metal Mould Casting technique, clay wet sand casting technique are no exception, and major defect is:
1, V method casting technique shortcoming: in actual production process, V method is cast in modeling process and becomes to need spray paint, certain dust is there is during spraying, and when spraying not in place, easily make that scab, burning into sand appear in foundry goods, the casting flaws such as sand of collapsing, mould fitter's ordered pair sandbox, template management expectancy are very tight, are responsible for easily occurring mould shift defect for mould assembling operation.
2, resin-coated sand shell mould casting technique shortcoming: resin-coated sand shell mould casting technique, by the impact of shell mould intensity, is applicable to overall size less, the production of the foundry goods that wall thickness is thinner.
3, Sand-Faced Metal Mould Casting processing disadvantages: when Iron Mould Coated Sand is produced, its sand mold adopts the heat cure of hot box method, and need certain temperature and time, this have impact on the production efficiency of Iron Mould Coated Sand, not too applicable to the production of typical products in mass production; The moulding machine of Iron Mould Coated Sand is exactly a hot box shoot core machine, so be also not suitable for the large part of production, Complex Parts.
4, clay wet sand casting processing disadvantages: will be coated on sand grain surface by the clay slip of thickness during mulling, needs to use the high power sand blender having rubbing effect, otherwise can not obtain the second best in quality molding sand; Due to molding sand mixed after namely there is quite high intensity, during moulding, molding sand not easily flows, and is difficult to reality of pounding, and not only requires great effort but also need certain skill during hand moulding, and with during machine molding, then equipment is complicated and huge; The rigidity of casting mold is not high, and the dimensional accuracy of foundry goods is poor; Foundry goods is easy to produce the defects such as sand washing, burning into sand, pore.
Summary of the invention
In order to solve deficiency of the prior art, the object of the present invention is to provide a kind of brake drum manufacture method, the method is combining by V method casting technique and resin-coated sand shell mould casting technique, realize: the shortcoming making up resin-coated sand shell mould casting technique by the advantage of V method casting technique, make up the shortcoming of V method casting technique by the advantage of resin-coated sand shell mould casting technique, thus reach two technological advantage and combine.
For achieving the above object, the present invention is by the following technical solutions:
A kind of brake drum manufacture method, described manufacture method specifically comprises the following steps:
1) be that raw material produces patrix shell mould, counterdie shell mould and cup shell mould respectively with precoated sand on core shooter, then patrix shell mould, counterdie shell mould and cup shell mould are carried out assembling and form overall resin-coated sand shell mould, wherein form the die cavity for casting brake drum between patrix shell mould, counterdie shell mould, the cast passage of cup shell mould inside is communicated with above-mentioned die cavity;
2) sandbox is placed on plain jolter;
3) in sandbox, add the dry sand that a layer thickness is 30-150mm, after plain jolter ram-jolt, form bed load layer;
4) be placed on the bed load layer of sandbox inside by the resin-coated sand shell mould assembled, the upper surface of sandbox is extended at the sprue gate of cup shell mould; Then continue to fill up dry sand in sandbox, four periderm dry sands of patrix shell mould and counterdie shell mould are surrounded, then through plain jolter, ram-jolt is carried out to the dry sand in sandbox;
5) in above-mentioned steps 4) dry sand surface coverage one deck notacoria after ram-jolt, then sandbox is vacuumized, make sandbox inside form negative pressure;
6) liquid metal after fusing is injected by the sprue gate of cup shell mould the die cavity formed between patrix shell mould and counterdie shell mould, remove negative pressure, unpacking, molding taking-up foundry goods after cooling, and remove the dead head on foundry goods.
Preferably, in step 1), assembling place of patrix shell mould and counterdie shell mould adopts the tight fit sealing of circle seam location.Above-mentioned location structure is compared and is adopted white glue adhering and sealing, and technique is simpler, and assembling speed is faster, better tightness.
Preferably, step 2) in, be respectively equipped with positioning sleeve in the both sides of sandbox, on plain jolter, corresponding positioning sleeve is provided with alignment pin, when sandbox is placed on plain jolter, realizes locating with coordinating of alignment pin by positioning sleeve.Coordinated by guide, the location of empty sandbox on plain jolter can be realized rapidly.
Preferably, step 2) in, lay one deck rubber blanket at the upper surface of plain jolter, sandbox is placed on rubber blanket.By rubber blanket, make to add sand vibrations and become soft vibrations by the hard vibrations between original sandbox and plain jolter, improve the service life of equipment.
The present invention adopts above technical scheme, has following technique effect:
1, by obtaining the die cavity with good strength and the degree of packing in conjunction with V method casting technique, for resin-coated sand shell mould provides good strength support.
2, by not needing to brush any coating and foundry goods clear-cut in conjunction with resin-coated sand shell mould casting technique, any surface finish, size is accurate, can evade V method casting technique burning into sand, press from both sides coating without the feature of machining or only a small amount of processing, the generation of the sand that collapses, mould shift defect.The present invention produces the up-to-standard rate of brake drum foundry goods contrast V method casting technique can promote 3%-4%.
3, contrast V method casting technique, " casting of V method is cast with resin-coated sand shell mould and combined " can reduce castings production energy consumption per ton.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details:
Fig. 1 adopts usual manner to be assembled into overall resin-coated sand shell mould structural representation;
Fig. 2 adopts optimal way to be assembled into overall resin-coated sand shell mould structural representation;
Fig. 3 is the structural representation that sandbox is placed on plain jolter by employing usual manner;
Fig. 4 is the structural representation that sandbox is placed on plain jolter by employing optimal way;
Fig. 5 is the structural representation adding dry sand and form bed load layer in sandbox;
Assembling is formed overall resin-coated sand shell mould to put into sandbox by Fig. 6, then fills up the structural representation of dry sand;
Fig. 7 is the structural representation of foundry goods final molding.
Detailed description of the invention
As shown in one of Fig. 1 to 7, a kind of brake drum manufacture method of the present invention, described manufacture method specifically comprises the following steps:
1) be that raw material produces patrix shell mould 11, counterdie shell mould 12 and cup shell mould 13 respectively with precoated sand on core shooter, then patrix shell mould 11, counterdie shell mould 12 and cup shell mould 13 is carried out assembling and form overall resin-coated sand shell mould 1, wherein form the die cavity for casting brake drum between patrix shell mould 11, counterdie shell mould 12, the cast passage of cup shell mould 13 inside is communicated with above-mentioned die cavity; In Fig. 1, assembling place of patrix shell mould 11 and counterdie shell mould 12 adopts white glue to be bonded and sealed, and as preferably, as shown in Figure 2, assembling place of patrix shell mould 11 and counterdie shell mould 12 adopts circle seam 14 to locate tight fit sealing.Above-mentioned location structure is compared and is adopted white glue adhering and sealing, and technique is simpler, and assembling speed is faster, better tightness.
2) be placed on plain jolter 3 by sandbox 2, the bottom of sandbox 2 of the present invention has base plate, and is formed closed; As preferably, as shown in Figure 4, be respectively equipped with positioning sleeve 21 in the both sides of sandbox 2, on plain jolter 3, corresponding positioning sleeve 21 is provided with alignment pin 31, when sandbox 2 is placed on plain jolter 3, realizes locating with coordinating of alignment pin 31 by positioning sleeve 21.Coordinated by guide, the empty location of sandbox 2 on plain jolter 3 can be realized rapidly.
3) in sandbox 2, add the dry sand that a layer thickness is 30-150mm, after plain jolter 3 ram-jolt, form bed load layer;
4) be placed on by the resin-coated sand shell mould 1 assembled on the bed load layer of sandbox 2 inside, the upper surface of sandbox 2 is extended at the sprue gate of cup shell mould 13; Then continue to fill up dry sand in sandbox 2, four periderm dry sands of patrix shell mould 11 and counterdie shell mould 12 are surrounded, then the dry sand in plain jolter 3 pairs of sandboxes 2 carries out ram-jolt;
5) in above-mentioned steps 4) dry sand surface coverage one deck notacoria (not shown) after ram-jolt, then sandbox 2 is vacuumized, make sandbox 2 inside form negative pressure;
6) liquid metal after fusing is injected the die cavity formed between patrix shell mould 11 and counterdie shell mould 12 by the sprue gate of cup shell mould 13, remove negative pressure after cooling, unpack, molding takes out foundry goods 5, and remove the dead head on foundry goods 5.
In addition, as preferably, step 2) in, lay one deck rubber blanket (not shown) at the upper surface of plain jolter 3, sandbox 2 is placed on rubber blanket.By rubber blanket, make to add sand vibrations and become soft vibrations by the hard vibrations between original sandbox 2 and plain jolter 3, improve the service life of equipment.
Claims (4)
1. a brake drum manufacture method, is characterized in that: described manufacture method specifically comprises the following steps:
1) be that raw material produces patrix shell mould, counterdie shell mould and cup shell mould respectively with precoated sand on core shooter, then patrix shell mould, counterdie shell mould and cup shell mould are carried out assembling and form overall resin-coated sand shell mould, wherein form the die cavity for casting brake drum between patrix shell mould, counterdie shell mould, the cast passage of cup shell mould inside is communicated with above-mentioned die cavity;
2) sandbox is placed on plain jolter;
3) in sandbox, add the dry sand that a layer thickness is 30-150mm, after plain jolter ram-jolt, form bed load layer;
4) be placed on the bed load layer of sandbox inside by the resin-coated sand shell mould assembled, the upper surface of sandbox is extended at the sprue gate of cup shell mould; Then continue to fill up dry sand in sandbox, four periderm dry sands of patrix shell mould and counterdie shell mould are surrounded, then through plain jolter, ram-jolt is carried out to the dry sand in sandbox;
5) in above-mentioned steps 4) dry sand surface coverage one deck notacoria after ram-jolt, then sandbox is vacuumized, make sandbox inside form negative pressure;
6) liquid metal after fusing is injected by the sprue gate of cup shell mould the die cavity formed between patrix shell mould and counterdie shell mould, remove negative pressure, unpacking, molding taking-up foundry goods after cooling, and remove the dead head on foundry goods.
2. a kind of brake drum manufacture method according to claim 1, is characterized in that: in step 1), and assembling place of patrix shell mould and counterdie shell mould adopts the tight fit sealing of circle seam location.
3. a kind of brake drum manufacture method according to claim 1, it is characterized in that: step 2) in, be respectively equipped with positioning sleeve in the both sides of sandbox, on plain jolter, corresponding positioning sleeve is provided with alignment pin, when sandbox is placed on plain jolter, realize locating with coordinating of alignment pin by positioning sleeve.
4. a kind of brake drum manufacture method according to claim 1, is characterized in that: step 2) in, lay one deck rubber blanket at the upper surface of plain jolter, sandbox is placed on rubber blanket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510027777.1A CN104588581A (en) | 2015-01-20 | 2015-01-20 | Manufacturing method of brake drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510027777.1A CN104588581A (en) | 2015-01-20 | 2015-01-20 | Manufacturing method of brake drum |
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| CN104588581A true CN104588581A (en) | 2015-05-06 |
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| CN201510027777.1A Pending CN104588581A (en) | 2015-01-20 | 2015-01-20 | Manufacturing method of brake drum |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785730A (en) * | 2015-05-11 | 2015-07-22 | 江苏力源金河铸造有限公司 | Actuator box body casting process |
| CN104923730A (en) * | 2015-06-11 | 2015-09-23 | 柳州金特新型耐磨材料股份有限公司 | Drum brake production method through V-process casting |
| CN105618686A (en) * | 2016-03-29 | 2016-06-01 | 安徽新宁装备股份有限公司 | Forming technology for sand mold casting head and technology structure of forming technology |
| CN105834360A (en) * | 2015-11-18 | 2016-08-10 | 连云港源钰金属制品有限公司 | Casting method for making shell mold through 3D printing |
| CN105855466A (en) * | 2016-06-02 | 2016-08-17 | 龙岩盛丰机械制造有限公司 | Brake drum one-casting six-piece V-process casting technological method and brake drum one-casting six-piece V-process casting device |
| CN106825418A (en) * | 2017-04-13 | 2017-06-13 | 扬州广润机械有限公司 | A kind of profile-followed metal support mould resin-coated sand shell mould casting mould component |
| CN107297458A (en) * | 2017-07-19 | 2017-10-27 | 济南赛维机械设备有限公司 | A kind of vacuum shell mould and shell mould forming method |
| CN107812925A (en) * | 2017-12-06 | 2018-03-20 | 安徽应流航源动力科技有限公司 | A kind of device for improving vacuum pouring casting crystalline grain degree |
| CN108044035A (en) * | 2017-12-01 | 2018-05-18 | 东方电气集团东方汽轮机有限公司 | A kind of hot investment casting Split type ceramic formwork assembling forming process |
| CN110842155A (en) * | 2019-11-26 | 2020-02-28 | 江苏京成机械制造有限公司 | Waste incineration grate precoated sand shell mold casting process |
| CN113441681A (en) * | 2021-06-29 | 2021-09-28 | 山河智能装备股份有限公司 | Sand-coated sand casting mold for multi-way valve |
| CN114603116A (en) * | 2022-03-14 | 2022-06-10 | 晋城市金工铸业有限公司 | Metal casting surface alloy protection process |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785730A (en) * | 2015-05-11 | 2015-07-22 | 江苏力源金河铸造有限公司 | Actuator box body casting process |
| CN104923730A (en) * | 2015-06-11 | 2015-09-23 | 柳州金特新型耐磨材料股份有限公司 | Drum brake production method through V-process casting |
| CN105834360A (en) * | 2015-11-18 | 2016-08-10 | 连云港源钰金属制品有限公司 | Casting method for making shell mold through 3D printing |
| CN105618686A (en) * | 2016-03-29 | 2016-06-01 | 安徽新宁装备股份有限公司 | Forming technology for sand mold casting head and technology structure of forming technology |
| CN105855466A (en) * | 2016-06-02 | 2016-08-17 | 龙岩盛丰机械制造有限公司 | Brake drum one-casting six-piece V-process casting technological method and brake drum one-casting six-piece V-process casting device |
| CN106825418A (en) * | 2017-04-13 | 2017-06-13 | 扬州广润机械有限公司 | A kind of profile-followed metal support mould resin-coated sand shell mould casting mould component |
| CN107297458A (en) * | 2017-07-19 | 2017-10-27 | 济南赛维机械设备有限公司 | A kind of vacuum shell mould and shell mould forming method |
| CN108044035A (en) * | 2017-12-01 | 2018-05-18 | 东方电气集团东方汽轮机有限公司 | A kind of hot investment casting Split type ceramic formwork assembling forming process |
| CN107812925A (en) * | 2017-12-06 | 2018-03-20 | 安徽应流航源动力科技有限公司 | A kind of device for improving vacuum pouring casting crystalline grain degree |
| CN110842155A (en) * | 2019-11-26 | 2020-02-28 | 江苏京成机械制造有限公司 | Waste incineration grate precoated sand shell mold casting process |
| CN113441681A (en) * | 2021-06-29 | 2021-09-28 | 山河智能装备股份有限公司 | Sand-coated sand casting mold for multi-way valve |
| CN114603116A (en) * | 2022-03-14 | 2022-06-10 | 晋城市金工铸业有限公司 | Metal casting surface alloy protection process |
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Application publication date: 20150506 |