機(jī)床鑄件毛坯檢測與高壓造型的優(yōu)缺點(diǎn)

時間：2015/12/26 10:03:47 瀏覽量：464 當(dāng)機(jī)床鑄件毛坯精度要求低、牛產(chǎn)批量坡小刊，采用木棋手工造型；當(dāng)毛坯精度要求較高且產(chǎn)量很大時，刑治屆橫機(jī)器造型。七毛壞的強(qiáng)度要求較高業(yè)形狀復(fù)雜時，可采用鑄鋼；有特風(fēng)塵求時，可采構(gòu)鋼、鋁等有色金屬：侖屆的鑄造件。金屆購銷治性是指澆注金屬時液態(tài)金屬的流動性、凝固時的收縮性別拙忻傾向性等。流動件奸的余屆稠料只有良好的充填鑄型的能力，能夠鑄出大而薄的。收縮。收縮是指液態(tài)金屬凝固時體積收縮利凝固后的線收縮，收的利川率，減小鑄件戶生變形或裂紋的可能性。偏析。偏祈是指鑄件凝團(tuán)員各處化學(xué)成分的不均勻，苦偏析嚴(yán)重、學(xué)性能變壞。鑄造適用丁機(jī)床床身、支架、變速相、缸體、策休等形狀較復(fù)雜的零件毛坯。其制造方法土要有砂型鑄造、金屆則鑄造、壓力鑄尷、熔模鑄造、離心鑄退等。較常用的是砂型鑄造。當(dāng)機(jī)床鑄件毛坯精度要求低、牛產(chǎn)批量坡小刊，采用木棋手工造型；當(dāng)毛坯精度要求較高且產(chǎn)量很大時，刑治屆橫機(jī)器造型。七毛壞的強(qiáng)度要求較高業(yè)形狀復(fù)雜時，可采用鑄鋼；有特風(fēng)塵求時，可采構(gòu)鋼、鋁等有色金屬：
(1)侖屆的鑄造件。金屆購銷治性是指澆注金屬時液態(tài)金屬的流動性、凝固時的收縮性別拙忻傾向性等。流動件奸的余屆稠料只有良好的充填鑄型的能力，能夠鑄出大而薄的。
(2)收縮。收縮是指液態(tài)金屬凝固時體積收縮利凝固后的線收縮，收的利川率，減小鑄件戶生變形或裂紋的可能性。
(3)偏析。偏祈是指鑄件凝團(tuán)員各處化學(xué)成分的不均勻，苦偏析嚴(yán)重、學(xué)性能變壞。
1、機(jī)床鑄件造型的優(yōu)點(diǎn)
（1）機(jī)床鑄件尺寸精確，表面光潔。
（2）機(jī)床鑄件重量比普通造型方法減輕10％，且重量均勻一致。鑄鋼件的重量偏差由普通機(jī)器造型的3％~5％降低為1％~2％；床身鑄件的重量偏差由原來的1.5％降低到1％.另外，由于精度高可以減少加工余量，節(jié)約金屬也節(jié)約加工工時。
（3）壓實(shí)緊砂的工藝簡單，易于實(shí)現(xiàn)自動化造型，生產(chǎn)效率高。
（4）降低勞動強(qiáng)度，改善勞動條件。很大一部分鑄件，皮帶輪可采用單純壓實(shí)緊砂造型方法，噪音小。
（5）砂型緊實(shí)度高，蓄熱系數(shù)高，也加快了金屬凝固，改善鑄件內(nèi)的質(zhì)量，金相組織更為致密，力學(xué)性能有所提高。
（6）高壓造型有較大的適應(yīng)性，能制造復(fù)雜，較大的鑄件。
2、機(jī)床鑄件高壓造型缺點(diǎn)
（1）設(shè)備投資大、結(jié)構(gòu)復(fù)雜、龐大，多采用液壓傳動。為了提高機(jī)器效率一般是主機(jī)，輔機(jī)配套組成流水線。
（2）要求工藝裝備精度高，剛性大，因而費(fèi)用高。

（3）要求較高的設(shè)備維修和保養(yǎng)能力。

When the machine tool casting blank precision requirements are low, the cattle production batch slope is published, the wooden chess is used for manual modeling; when the blank precision requirements are high and the output is large, the cross-machine shape is adopted. If the strength of the seven-wool is high, the shape of the industry is complicated, and the cast steel can be used. When there is special wind and dust, the non-ferrous metals such as steel and aluminum can be used: the castings of the lun. The term of gold purchase and sale refers to the fluidity of liquid metal when pouring metal, and the tendency of shrinkage gender during solidification. The remaining thick material of the flow piece can only be cast into a large and thin shape with good ability to fill the mold. shrink. Shrinkage refers to the shrinkage of the volume after the solidification of the liquid metal, and the shrinkage of the line, which reduces the possibility of deformation or cracking of the cast. Segregation. Praying means that the chemical composition of the castings is uneven, the bitter segregation is serious, and the learning performance is deteriorated. The casting is suitable for the blanks of the more complex parts such as the bed of the machine tool, the bracket, the shifting phase, the cylinder block, and the strategy. The manufacturing method includes sand casting, gold casting, pressure casting, investment casting, centrifugal casting, and the like. More commonly used is sand casting. When the machine tool casting blank precision requirements are low, the cattle production batch slope is published, the wooden chess is used for manual modeling; when the blank precision requirements are high and the output is large, the cross-machine shape is adopted. When the strength of the seven-hair defect is high, the shape of the industry is complicated, and the cast steel can be used. When there is special wind and dust, the non-ferrous metals such as steel and aluminum can be used:
(1) The castings of the lun. The term of gold purchase and sale refers to the fluidity of liquid metal when pouring metal, and the tendency of shrinkage gender during solidification. The remaining thick material of the flow piece can only be cast into a large and thin shape with good ability to fill the mold.
(2) Shrinkage. Shrinkage refers to the shrinkage of the volume after the solidification of the liquid metal, and the shrinkage of the line, which reduces the possibility of deformation or cracking of the cast.
(3) Segregation. Praying means that the chemical composition of the castings is uneven, the bitter segregation is serious, and the learning performance is deteriorated.
1. Advantages of machine tool casting modeling
(1) Machine tool castings are accurate in size and smooth in surface.
(2) The weight of the machine tool casting is 10% lighter than the ordinary modeling method, and the weight is uniform. The weight deviation of the cast steel parts is reduced from 3% to 5% of the ordinary machine shape to 1% to 2%; the weight deviation of the bed castings is reduced from the original 1.5% to 1%. In addition, the machining allowance can be reduced due to high precision. Saving metal also saves processing time.
(3) The process of compacting and compacting sand is simple, easy to realize automatic modeling, and high production efficiency.
(4) Reduce labor intensity and improve working conditions. A large part of the castings, the pulley can be simply compacted and tight sand modeling method, the noise is small.
(5) The sand type has high compactness and high heat storage coefficient, which also accelerates the solidification of the metal, improves the quality of the casting, and the metallographic structure is more compact and the mechanical properties are improved.
(6) High-pressure molding has great adaptability and can manufacture complex and large castings.
2, machine tool casting high pressure modeling shortcomings
(1) The equipment investment is large, the structure is complex and huge, and hydraulic transmission is often used. In order to improve the efficiency of the machine is generally the host, the auxiliary machine is composed of the assembly line.
(2) The process equipment is required to have high precision and rigidity, so the cost is high.

(3) Requires higher equipment repair and maintenance capabilities.

Company name: botou zhuoyuan mechanical equipment manufacturing co.,LTD
Registered address: jiaohe development zone, botou city, hebei province
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