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鈑金加工流程

發(fā)布日期:2019-02-15 13:00:31 作者:admin 點(diǎn)擊:1321

根據鈑金件結構的差異,工藝流程可各不相同,但總的不超過(guò)以下幾點(diǎn)。

1、下料:下料方式有各種,主要有以下幾種方式

①. 剪床:是利用剪床剪切條料簡(jiǎn)單料件,它主要是為模具落料成形準備加工,成本低,精度低于0.2,但只能加工無(wú)孔無(wú)切角的條料或塊料。

②. 沖床:是利用沖床分一步或多步在板材上將零件展開(kāi)后的平板件沖裁成形各種形狀料件,其優(yōu)點(diǎn)是耗費工時(shí)短,效率高,精度高,成本低,適用大批量生產(chǎn),但要設計模具。

③. NC數控下料,NC下料時(shí)首先要編寫(xiě)數控加工程式,利用編程軟件,將繪制的展開(kāi)圖編寫(xiě)成NC數拉加工機床可識別的程式,讓其根據這些程式一步一刀在平板上沖裁各構形狀平板件,但其結構 受刀具結構所至,成本低,精度于0.15。

④. 鐳射下料,是利用激光切割方式,在大平板上將其平板的結構形狀切割出來(lái),同NC下料一樣需編寫(xiě)鐳射程式,它可下各種復雜形狀的平板件,成本高,精度于0.1.

⑤. 鋸床:主要用下鋁型材、方管、圓管、圓棒料之類(lèi),成本低,精度低。

1 鉗工:沉孔、攻絲、擴孔、鉆孔

沉孔角度一般120℃,用于拉鉚釘,90℃用于沉頭螺釘,攻絲英制底孔。

2 翻邊:又叫抽孔、翻孔,就是在一個(gè)較小的基孔上抽成一個(gè)稍大的孔,再攻絲,主要用板厚比較薄的鈑金加工,增加其強度和螺紋圈數,避免滑牙,一般用于板厚比較薄,其孔周正常的淺翻邊,厚度基本沒(méi)有變化,允許有厚度的變薄30-40%時(shí),可得到比正常翻邊高度大高40-60%的高度,用擠薄50%時(shí),可得*大的翻邊高度,當板厚較大時(shí),如2.0、2.5等以上的板厚,便可直接攻絲。

3 沖床:是利用模具成形的加工工序,一般沖床加工的有沖孔、切角、落料、沖凸包(凸點(diǎn)),沖撕裂、抽孔、成形等加工方式,其加工需要有相應的模具來(lái)完成操作,如沖孔落料模、凸包模、撕裂模、抽孔模、成型模等,操作主要注意位置,方向性。

4 壓鉚:壓鉚就本公司而言,主要有壓鉚螺母、螺釘、松不脫等,其是通過(guò)液壓壓鉚機或沖床來(lái)完成操作,將其鉚接到鈑金件上,還有漲鉚方式,需注意方向性。

5 折彎;折彎就是將2D的平板件,折成3D的零件。其加工需要有折床及相應折彎模具完成,它也有一定折彎順序,其原則是對下一刀不產(chǎn)生干涉的先折,會(huì )產(chǎn)生干涉的后折。


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