CN202411384U - Novel pressurizing device for finish turning glossy aluminum alloy wheel - Google Patents

Abstract

The utility model relates to a novel pressurizing device for a finish turning glossy aluminum alloy wheel. The pressurizing device consists of a nitrogen-making machine, a nitrogen drying machine, a gas storage tank, a control cabinet of a low-pressure casting machine system, a pressure-relief nitrogen recovery tank, a gas conduit and a low-pressure machine heat-preserving furnace, wherein nitrogen generated by the nitrogen-making machine is introduced to the nitrogen drying machine by the gas conduit; the dried and purified nitrogen is introduced to the gas storage tank by the gas conduit, and the pressure of the nitrogen in the gas storage tank is 500 to 700 kpa; the nitrogen in the gas storage tank is introduced to the control cabinet of the low-pressure casting machine system by the gas conduit, is introduced to the low-pressure machine heat-preserving furnace by the control cabinet of the low-pressure casting machine system, and is pressurized; and the gas flows to the pressure-relief nitrogen recovery tank by the gas conduit after each casting is subjected to die casting and pressure relief, and the gas in the pressure-relief nitrogen recovery tank flows to the nitrogen drying machine and then be dried and recycled by the gas conduit. According to the pressurizing device, the nitrogen is used as a pressurized medium in the low-pressure process, so that aluminum liquid oxides are reduced greatly, and pin blowholes and slag blowholes of final products are reduced; and the loss of aluminum, magnesium and strontium is low, and the mechanical property of the products is ensured.

Description

Bright aluminum-alloy wheel of finish turning used squeezer apparatus

Technical field

The utility model relates to the aluminum alloy wheel of vehicle casting field, specifically, relates to bright aluminum-alloy wheel of a kind of finish turning and uses squeezer apparatus.

Background technology

At present, in the especially high-quality aluminum-alloy wheel manufacture process of aluminum alloy wheel of vehicle manufacturing, the purified treatment of aluminium liquid is very important link; In the aluminum-alloy wheel low pressure casting process, the aluminium liquid of holding furnace can, oxidation air-breathing along with the prolongation of time, thereby in product, produces problems such as pin hole, cinder hole, influences the quality and the outward appearance of aluminum-alloy wheel.For farthest removing the oxide slag inclusion and the hydrogen of aluminium liquid, generally take in subcontract in the nitrogen rotary blowing purify aluminium liquid method, pressure medium generally uses dry compressed air in low pressure casting process.But still contain 21% oxygen in the dry compressed air, product of every die casting all experiences the process of pressurization, pressure release in the low pressure casting process, and promptly dry compressed air gets into, and gas was discharged after die casting was accomplished.Because contained oxygen is active gases in the compressed air, aluminium, magnesium, titanium, strontium etc. are reactive metal in the aluminum alloy melt, so contained oxygen constantly contacts the generation oxidation reaction with liquid aluminum in this production process because in the compressed air, generate aluminium oxide (Al ₂O ₃), magnesia (MgO), titanium oxide (TiO) strontium oxide strontia (SrO); Along with above oxide in the prolongation alloy liquid of time is more and more; Beneficial element aluminium, magnesium, titanium, content of strontium are fewer and feweri; Institute's hydrogen, oxide slag inclusion are also more and more in the foundry goods of being produced, and the interior aluminium liquid density of low pressure machine holding furnace is lower than 2.50g/cm after general 3 hours ³, the every 1000mm in final finished surface ²Dispersed pit, pin hole are more than 10 places; And the defective diameter is greater than 0.5mm; The mechanical property of product constantly descends simultaneously; This technology mainly is coated with the producer that wheel-mounted is master problem with production and does not give prominence to domestic, because the full coat wheel-mounted is not high to the blank appearance requirement, can cover the part defective of product in the coating-spraying process; But is that master's the above traditional handicraft of enterprise more and more can not satisfy requirement of products for resembling my company this to produce high-grade aluminum-alloy wheel; Particularly bright aluminum-alloy wheel of finish turning become the favorite in market at present; This product has the strict outward appearance and the requirement of interior quality, and aluminium liquid density must be higher than 2.60g/cm in the casting process ³, the every 1000mm in final finished surface ²Dispersed pit, pin hole can not be more than 3 places, and the defective diameter can not be greater than 0.2mm; And to reach above requirement, the purified treatment of aluminium liquid is extremely important, so the production of bright aluminum-alloy wheel of finish turning presses for the more advanced aluminium liquid purification techniques of searching.

Summary of the invention

The purpose of the utility model is the deficiency that overcomes prior art; Generally adopting compressed air to traditional low pressure casting aluminum alloy wheel cast process is that easily reflection generates the problem of oxidation reaction generation oxide slag inclusion to pressure medium with aluminium liquid; A kind of new pressue device is provided, and bright aluminum-alloy wheel of specifically a kind of finish turning used squeezer apparatus.

Realize that above purpose technical scheme is: bright aluminum-alloy wheel of a kind of finish turning used squeezer apparatus, and this device is made up of nitrogen making machine, nitrogen drying machine, air accumulator, air injection machine system switch board, pressure release nitrogen recycling jar, gas conduit, low pressure machine holding furnace.The nitrogen that nitrogen making machine produces leads to the nitrogen drying machine through conduit, and nitrogen gas purity is more than or equal to 99.99%, through the nitrogen dew point of dry decontamination smaller or equal to-40; Lead to air accumulator through nitrogen dry, that purify through conduit, the nitrogen pressure of air accumulator is at 500kpa～700kpa; The nitrogen of air accumulator leads to air injection machine system switch board through conduit, and leads to low pressure machine holding furnace through air injection machine system switch board and pressurize; The gas that every die casting is accomplished after the foundry goods pressure release flows to pressure release nitrogen recycling jar through conduit, and the gas in the pressure release nitrogen recycling jar flows to the nitrogen drying machine through gas conduit and carries out dry reuse.

The advantage of the utility model is: be dry nitrogen at the low pressure casting process pressure medium; Nitrogen contacts with the interior liquid aluminum of low pressure machine holding furnace oxidation reaction does not take place basically; So aluminium, magnesium, strontium isoreactivity metal can not produce oxidation reaction basically in the aluminium liquid along with the production time prolongs; Oxide slag inclusions such as aluminium oxide, magnesia, strontium oxide strontia are few in the aluminium liquid, and aluminium liquid cleanliness factor is high, and the interior aluminium liquid density of low pressure machine holding furnace reaches 2.65g/cm after 3 hours ³Final products pin hole, cinder hole are less; The loss of aluminium, magnesium, strontium simultaneously is less, along with the lasting product changes of mechanical properties of producing is little; Set up the nitrogen circulation using system, it is less that aluminium liquid purifies cost in the production process.

Description of drawings

Fig. 1 is the utility model structural representation.

The specific embodiment

As shown in Figure 1, bright aluminum-alloy wheel of a kind of finish turning used squeezer apparatus, comprises nitrogen making machine 1, nitrogen drying machine 2, air accumulator 3, air injection machine system switch board 4, pressure release nitrogen recycling jar 5, low press aluminium liquid holding furnace 6, gas conduit 7.The nitrogen that nitrogen making machine 1 produces leads to nitrogen drying machine 2 through conduit 7, and nitrogen gas purity is more than or equal to 99.99%, and the nitrogen dew point is smaller or equal to-45; Lead to air accumulator 3 through nitrogen dry, that purify through conduit 7; The nitrogen that the nitrogen of air accumulator 3 leads to air injection machine system switch board 4. air injection machine system switch boards 4 through conduit leads to low pressure machine holding furnace 6 and pressurizes; The gas that every die casting is accomplished after the foundry goods pressure release flows to pressure release nitrogen recycling jar 5 through conduit, and the gas in the pressure release nitrogen recycling jar 5 flows to nitrogen drying machine 2 through gas conduit 7 and carries out dry reuse.Through electronic balance, hydrogen meter, spectrometer and universal tensile testing machine aluminium liquid density, chemical composition and material mechanical performance are tested.Can find out that through table 1 analysis this use the present invention can obviously improve aluminium liquid density, reduces the oxide slag inclusion, improves material mechanical performance, reduce the manufacture process defective products.

Table 1: use the contrast of the utility model and former low pressure casting dried compressed air pressurization each item index

Claims (2)

1. bright aluminum-alloy wheel of a finish turning used squeezer apparatus, it is characterized in that this device is made up of nitrogen making machine (1), nitrogen drying machine (2), air accumulator (3), air injection machine system switch board (4), pressure release nitrogen recycling jar (5), low pressure machine holding furnace (6), gas conduit (7); The nitrogen that nitrogen making machine (1) produces leads to nitrogen drying machine (2) through conduit; Lead to air accumulator (3) through nitrogen dry, that purify through conduit, the nitrogen pressure of air accumulator (3) is at 500kpa～700kpa; The nitrogen of air accumulator (3) leads to air injection machine system switch board (4) through conduit, and leads to low pressure machine holding furnace (6) through air injection machine system switch board (4) and pressurize; The gas that every die casting is accomplished after the foundry goods pressure release flows to pressure release nitrogen recycling jar (5) through conduit; This device greatly reduces the aluminium liquid oxidation owing to use the pressure medium of nitrogen as low pressure event, and final products pin hole, cinder hole are reduced; The loss of aluminium, magnesium, strontium simultaneously is less, has ensured the mechanical property of product.

2. bright aluminum-alloy wheel of a kind of finish turning according to claim 1 used squeezer apparatus, it is characterized in that nitrogen drying machine (2) is connected through gas conduit (7) with pressure release nitrogen recycling jar (5), can constantly recycle the nitrogen in the pressure process.

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