CN204716826U - A kind of real brake bottom blank of swage stuccoing casting - Google Patents

Abstract

The utility model relates to the real brake bottom blank of a kind of swage stuccoing casting, belongs to auto parts and components field.The right braking hoof that described drum brake for rear axle of lorry floor pan assembly comprises left brake shoe, is connected with described left brake shoe; Described left brake shoe is identical with described right braking hoof structure; Described left brake shoe comprises brake backing plate, is arranged on axle housing half axis hole in the middle part of described brake backing plate, the camshaft through hole base be connected with described brake backing plate one end, the camshaft through hole be arranged in described camshaft through hole base, the left shoe plate that is connected with the described brake backing plate the other end respectively prop up pin-and-hole seat and right shoe plate props up pin-and-hole seat, be arranged on the described left shoe plate left shoe plate propped up in pin-and-hole seat props up pin-and-hole, is arranged on the right shoe plate that described right shoe plate props up in pin-and-hole seat and props up pin jack.The real brake bottom blank of the utility model swage stuccoing casting has the advantages such as dense structure is non-leakage, manufacturing efficiency is high, low cost of manufacture, the feature of environmental protection are good, and quality gets a promotion, and product reliability is higher.

Description

A kind of real brake bottom blank of swage stuccoing casting

Technical field

The utility model relates to auto parts and components field, the real brake bottom blank of particularly a kind of swage stuccoing casting.

Background technique

In recent years, automotive industry develop into Automobile Parts Industry, particularly the development of foundry enterprise provides huge development space.Automobile drum brake base plate is the major part of automotive brake, and be also main safety brake part, market demand is huge.Traditional break casting method adopts clay-bonded sand hand molding or machine molding, and general scale is less, and the enterprise of product supply component market, also produces at use hand molding; Some are larger, are mainly the open mo(u)lding line production that supporting enterprise of vehicle bridge main engine factory mostly adopts air-actuated shockless jolt moulding to form.Adopt clay-bonded sand casting major defect to be that Factors Affecting Product Quality is many, manufacture control difficulty is large, often causes foundary loss rate to remain high.Foundary loss is generally maximum with sand holes and Shrinkage cavity, accounts for more than 70% of all waste products.The production of automobile casting mainly contains common wet sand casting, cold setresin sand casting process, centrifugal casting and Sand-Faced Metal Mould Casting technique.And there is the shortcomings such as complex process, yield rate be low in common sand mold and Reform of Resin Sand Casting fabrication technique, and Sand-Faced Metal Mould Casting is covered with skim molding sand at metal mold (the being called swage) inner chamber of dumming and forms casting mold, by the weight to swage, wall thickness and the conservative control covering sand layer thickness, make filling type, solidifying and complete under a more satisfactory condition with cooling procedure of foundry goods, eliminate the factor producing casting defect to greatest extent, thus greatly can improve the quality of foundry goods.In addition, Sand-Faced Metal Mould Casting adopts precoated sand moulding, and the casting dimension accuracy of production is high, and surface quality is good.Due to swage good rigidly, do not have deformability, the cast-internal dense materials of production, reject rate reduces greatly.

Summary of the invention

In order to solve the problem of prior art, the utility model embodiment provides one and has the advantages such as dense structure is non-leakage, manufacturing efficiency is high, low cost of manufacture, the feature of environmental protection are good, quality gets a promotion, the real brake bottom blank of the swage stuccoing casting that product reliability is higher.Described technological scheme is as follows:

The utility model embodiment provides the real brake bottom blank of a kind of swage stuccoing casting,

The right braking hoof that described drum brake for rear axle of lorry floor pan assembly comprises left brake shoe, is connected with described left brake shoe; Described left brake shoe is identical with described right braking hoof structure;

Described left brake shoe comprises brake backing plate, is arranged on axle housing half axis hole in the middle part of described brake backing plate, the camshaft through hole base be connected with described brake backing plate one end, the camshaft through hole be arranged in described camshaft through hole base, the left shoe plate that is connected with the described brake backing plate the other end respectively prop up pin-and-hole seat and right shoe plate props up pin-and-hole seat, be arranged on the described left shoe plate left shoe plate propped up in pin-and-hole seat props up pin-and-hole, is arranged on the right shoe plate that described right shoe plate props up in pin-and-hole seat and props up pin jack.

The beneficial effect that the technological scheme that the utility model embodiment provides is brought is:

The real brake bottom blank of swage stuccoing casting has the advantages such as dense structure is non-leakage, manufacturing efficiency is high, low cost of manufacture, the feature of environmental protection are good, and quality gets a promotion, and product reliability is higher.

Accompanying drawing explanation

In order to be illustrated more clearly in the technological scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the structural representation of the real brake bottom blank of the swage stuccoing casting that the utility model embodiment provides;

Fig. 2 is another structural representation of the real brake bottom blank of the swage stuccoing casting that the utility model embodiment provides;

Fig. 3 is the sectional view of the real brake bottom blank of the swage stuccoing casting that the utility model embodiment provides.

Embodiment

For making the purpose of this utility model, technological scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model mode of execution is described in further detail.

Embodiment

The utility model embodiment provides the real brake bottom blank of a kind of swage stuccoing casting, the right braking hoof that the real brake bottom blank that described swage stuccoing is cast comprises left brake shoe, is connected with left brake shoe, left brake shoe is identical with right braking hoof structure, is described in detail in the present embodiment for left brake shoe;

See Fig. 1 to Fig. 3, left brake shoe comprises brake backing plate 2, is arranged on axle housing half axis hole 3 in the middle part of brake backing plate 2, the camshaft through hole base 6 be connected with brake backing plate 2 one end, the camshaft through hole 1 be arranged in camshaft through hole base 6, the left shoe plate that is connected with brake backing plate 2 the other end respectively prop up pin-and-hole seat 7 and right shoe plate props up pin-and-hole seat 8, be arranged on the left shoe plate left shoe plate propped up in pin-and-hole seat 7 props up pin-and-hole 4, is arranged on the right shoe plate that right shoe plate props up in pin-and-hole seat 8 and props up pin jack 5.

Pouring system adopts semi-enclosed, and F is straight: Σ F is horizontal: in Σ F=1.3: 1.7: 1, ensureing, under certain skimming effect, to reduce the scouring force to sand mold.Iron liquid flows into from top, is easy to be full of, and reduce misrun or cold shut phenomenon, and temperature gradient is also conducive to feeding.

Make the swage of type by mold closing device mould assembling.In order to overcome the casting defect such as slag inclusion, burning into sand, during mould assembling, place resistant to elevated temperatures fibrous filter net at the mold joint of pouring system.Pour into a mould in cast section after mould assembling, general pouring temperature controls at 1420 DEG C ~ 1350 DEG C, and the pouring time of every type controlled within 30 seconds.After casting complete, within about 3 minutes, remove pouring cup to unpack.Within about 15 minutes to be cooled, can unpack at case unpacker.Because brake backing plate inner chamber is for cylindrical outer shape is for many, foundry goods cooling meat after unpacking, and swage does not have deformability substantially, therefore brake backing plate is wrapped on mo(u)ld bottom half, is difficult to fall, and therefore must adopt special device.In addition, because swage is with brake backing plate external form, during design mould turnover hanging axis, deviation of gravity center is more, cannot artificial mould turnover, and therefore, swage does not design hanging axis, general employing drum type electric turnover machine.In order to realize Green foundry, optimize work on the spot environment, present invention process adopts electric heating, reduces CO in manufacturing process ²with the discharge of water vapor, reduce environmental pollution, adopt pouring cup etc. to reclaim scrap iron as raw material simultaneously, reduce product cost.

Casting quality, need to solve scab problem, major measure has: penetrate chiltern amount when improving moulding, designs the exhaust of mould, makes moulding consolidation; Control the temperature of temperature, particularly swage of model, swage well.The quality of brake backing plate foundry goods is at about 20kg, amount of stored heat is larger, swage heat absorption is many, after several circulation, the temperature of swage can more than 250 DEG C, swage after moulding is in heated condition in mould assembling, cast waiting process always, precoated sand color can become dark brown, and intensity reduces greatly, easily causes sand washing and scab.Through production practices display, utilize Sand-Faced Metal Mould Casting technology to produce gray cast iron brake backing plate foundry goods than the casting of conventional clay sand advantageously, be mainly manifested in that reject rate is low, dense structure, casting dimension accuracy is high, surface quality good, influencing factors of quality is few.In guarantee iron liquid quality, choose precoated sand, control well under covering sand temperature, batch can be realized and stably produce.

Sand-Faced Metal Mould Casting produces one of good technique of gray cast iron brake drum foundry goods.And have employed reclaim scrap iron be raw material, produce foundry goods with electric heating, greatly reduce CO ²deng the discharge of waste gas, improve production environment, achieve Green foundry, for national energy-saving reduces discharging, achieve recycling economy, meet national industrial policies.

Sand-Faced Metal Mould Casting production technology is compared with traditional casting production process: 1, save normalizing, tempering process, has saved energy consumption; 2, quality gets a promotion, and product reliability is higher; 3, casting process controls well, and reject rate is low, and cost is low.Occupy little space, energy-conserving and environment-protective.

Sand-Faced Metal Mould Casting technology is adopted to produce grey cast iron drum brake base plate and shoe plate assembly.Adopt Sand-Faced Metal Mould Casting explained hereafter real brake bottom blank, overcome the shortcoming of conventional casting techniques, foundry goods cools, curing condition is good, the aspect such as nodulizing grade, grain size, consistency of foundry goods has and largely improves, improve foundry goods comprehensive mechanical property, reduce costs, improve production rate, decrease the pollution of production process to environment simultaneously, achieve Green foundry technique.

Covering sand molding is the key link that Sand-Faced Metal Mould Casting is produced, and general employing penetrates sand-heat cure moulding.Adopt duplex position to cover sand molding machine, what complete upper and lower mould swage covers sand molding simultaneously.Swage temperature 200 ~ 250 DEG C is controlled, model temperature about 250 DEG C during moulding.Wherein model temperature adopts electric heating tube heating, carries out closed loop control, substantially keep temperature constant state by the temperature control system of moulding machine.

Remaining temperature after swage temperature utilizes cast to unpack, the number of times that temperature circulates along with swage constantly rises, if cycle-index is many, generally needs to adopt temperature lowering water device for cooling to regulate temperature.Brake backing plate 4 arranged by every case, and material is high-carbon HT250 grey cast iron material, and this has become the main flow of drum brake the selection of material.

The beneficial effect that the technological scheme that the utility model embodiment provides is brought is:

The real brake bottom blank of swage stuccoing casting has the advantages such as dense structure is non-leakage, manufacturing efficiency is high, low cost of manufacture, the feature of environmental protection are good, and quality gets a promotion, and product reliability is higher.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (1)

1. a real brake bottom blank for swage stuccoing casting, is characterized in that,

The right braking hoof that described drum brake for rear axle of lorry floor pan assembly comprises left brake shoe, is connected with described left brake shoe; Described left brake shoe is identical with described right braking hoof structure;

Described left brake shoe comprises brake backing plate, is arranged on axle housing half axis hole in the middle part of described brake backing plate, the camshaft through hole base be connected with described brake backing plate one end, the camshaft through hole be arranged in described camshaft through hole base, the left shoe plate that is connected with the described brake backing plate the other end respectively prop up pin-and-hole seat and right shoe plate props up pin-and-hole seat, be arranged on the described left shoe plate left shoe plate propped up in pin-and-hole seat props up pin-and-hole, is arranged on the right shoe plate that described right shoe plate props up in pin-and-hole seat and props up pin jack.