t180推土机平衡梁装--焊工艺及总装配胎架的设计.doc

T180推土机平衡梁装--焊工艺及总装配胎架的设计

摘   要
首先根据推土机平衡梁的具体结构进行装-焊工艺的设计，在进行焊接装配采用整装整焊的方法,工件装配采用轴定位、活动支撑、夹紧器、挡铁定位和连杆定位的方法进行工件的定位。焊接时应采取合理的焊接工艺，选择的焊接参数必须要保证焊后焊缝不出现缺陷或所产生的缺陷在允许的范围内。拼焊采用焊条电弧焊进行焊接，正式焊接采用CO2气体保护焊进行焊接。焊后应进行及时的整修，以确保产品的合格率，避免产生工件的报废，造成不必要的损失。根据平衡梁的装-焊工艺进行总装配胎架的设计，平衡梁是批量生产要求装配胎架在装焊时工件方便装卸，减少工人的装配时间，减轻工人的工作量。所设计的总装配胎架在确保工件生产时要求精度的前提下，减少工时，降低产品成本以保证产品的经济利润，这是要求所设计的T180推土机平衡梁总装配胎架的基本理念。

关键词：焊接工装   焊接参数   焊接工艺

T180 Bulldozer balance beam assembly - welding process and assembly jig design
Abstract
  According to the specific structure of the balance beam of the bulldozer left - welding process design, in the welding assembly with integral assembly and welding method, workpiece assembly using axis positioning, clamping device, movable supporting, positioning and retaining iron connecting rod positioning method for workpiece positioning. Welding should take reasonable welding process, the welding parameters selection must guarantee the welding seam after welding is not defective or defects arising in the allowed range. Welding arc welding with welding rods for welding, formal welding using CO2 gas shielded arc welding welding. Welding shall be carried out after the timely repair, to ensure that the qualified rate of the products, to avoid the scrapped workpiece, causing unnecessary losses. Based on the balance beam. - welding process general assembly jig design, balance beam is the requirements of batch production assembly jig in the welding workpiece to facilitate loading and unloading, reduces the assembly time, reduce the workload of workers. The design of the general assembly jig in securing a workpiece production requirements of precision, reduce time, reduce product cost to ensure that the products of economic profit, it is required to design a T180 bulldozer balance beam assembly jig basic concept.

Key words: Welding fixture ，Welding parameters，welding proces

目 录

绪论-------------------------------------------------------------------------------------------  5
一、产品的组成和分析----------------------------------------------5
二、产品装焊工艺工序的划分----------------------------------------6
三、焊接方法的选择------------------------------------------------6
1、手工电弧焊------------------------------------------------- 6
2、熔化极活性气体保护焊--------------------------------------- 7
3、 焊接参数的选择--------------------------------------------11
四、装配焊接顺序的确定
1、一次拼焊--------------------------------------------------12
2、一次焊接--------------------------------------------------13
3、一次整修--------------------------------------------------14
4、二次拼焊--------------------------------------------------15
5、二次焊接---------------------------------------------------------------------------16
6、二次整修---------------------------------------------------------------------------17
五、胎架部分----------------------------------------------------18
1胎架的特点及要求-------------------------------------------18
2胎架设计方案-----------------------------------------------18
六、产品的检验--------------------------------------------------19
七、毕业设计的体会与心得----------------------------------------20
八、参考文献----------------------------------------------------21

九、教师评语与成绩----------------------------------------------22