SMTC 21549?2010
Minimum plate Nugget diameter dL thickness tmin √tmin mm mm 1.0 1.2 1.5 2.0 2.5 3.0 3.5 4.0 3.5 3.8 4.3 5.0 5.5 6.1 6.5 7.0 min≥3.5 Welding point diameter dpmin Lowest shearing = 1.2dL min tension Fmin mm kN 4.2 4.6 5.2 6.0 6.6 7.3 7.8 8.4 3.2 4.2 5.1 7.2 10.5 12.4 15.0 18.5 3.3.5 凸焊
3.3.5 Projection welding
焊接螺母以及焊接螺栓与钢板焊接后必须满足表6所示的最小头部拉力。焊接螺母，焊接螺栓同时必须满足表6所示的最小扭矩。焊接螺母，焊接螺栓的焊接强度原则上应用检验最小扭矩法，在有疑问或特别要求时才采用头部拉力试验法。
The welding of nuts and bolts as well as steel plate should reach the minimum head tensions listed in Table 6. Welding nuts and bolts should reach the minimum torque moments listed in Table 6. In principle, welding strengths of nuts and bolts should be inspected with the minimum torque method. Head tension test is adopted if there are doubts or special requirements.
表格适用于0.5～4 mm厚度的钢板，不同厚度钢板的要求值利用线性插入法计算得出。
The table applies to 0.5～4 mm-thick steel plates. Required values of steel plates of different thicknesses are calculated with the linear interpolation method. 表6 焊接螺母以及焊接螺栓要求
Table 6 Requirements on Welding Nuts and Bolts 螺纹规格 M4 M5 M6 M8 M10 M12 M14 M16 钢板厚度 mm 0.5 ≥1.25 0.5 ≥1.25 0.5 ≥1.75 0.75 ≥3.0 1.00 ≥3.5 1.50 ≥3.5 1.50 ≥3.5 1.50 ≥3.5
最小头部拉力FKZ KN 1.2 2.0 1.2 2.0 1.4 2.5 2.3 4.0 4.5 8.0 4.8 8.0 4.8 8.0 4.8 8.0 最小扭矩 N·M 10 15 14 20 25 35 65 85 100 130 110 155 110 155 110 155 22
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SMTC 21549?2010
Thread specification M4 M5 M6 M8 M10 M12 M14 M16 Steel plate thickness mm 0.5 ≥1.25 0.5 ≥1.25 0.5 ≥1.75 0.75 ≥3.0 1.00 ≥3.5 1.50 ≥3.5 1.50 ≥3.5 1.50 ≥3.5 Minimum head tension FKZ KN 1.2 2.0 1.2 2.0 1.4 2.5 2.3 4.0 4.5 8.0 4.8 8.0 4.8 8.0 4.8 8.0 Minimum torque moment N·M 10 15 14 20 25 35 65 85 100 130 110 155 110 155 110 155
4 返修
在焊接生产工序中，可能存在个别焊缝不符合要求而需要进行返修的情况，要制订一份返修工艺图。 4. Rework
In the working procedure of welding, the welding might be reworked since several welded seams do not conform to requirements. Therefore, a reworking technical chart should be formulated. 5 示意图 参考切片照片
5. Sketch map, refer to pictures of cut samples. 5.1剖面要求
切割点至少在焊缝开始之后或焊缝终端之前10mm的地方或在中间。 5.1 Section plane requirements
Cutting point should be 10mm after the start of welded seam or behind the end of welded seam, or at the middle of welded seam.
5.2 焊缝、焊点切片剖面位置图
图12所示例的是副车架的焊缝、焊点切片位置图，焊缝的编号方法。其它零件可参考这种方法制作。 5.2 Section plane position chart of cut samples of welded seam and point
Figure 12 displays the section plane position of cut samples of welded seam and point of sub-frame, and numbering method of welded seam. The other parts can be produced in reference to the method. 5.3切片照片
各类型焊缝的切片参考照片 见图13 — 图22 5.3 Cut sample pictures
Cut sample of various welded seams refer to Picture 13-22.
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SMTC 21549?2010
6 文件记录整理
将焊缝和点焊的检测结果整理到检查记录中。记录保存期限15年以上，切片保管6个月以上。 6. Document record arrangement
Inspection results of welded seam and spot welding should be recorded. The record should be stored for above 15 years, and cut samples above 6 months.
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SMTC 21549?2010
剖面位置编号示例：
Section plane position numbering example:
编号 连接构件 剖面1 — 8：上部/下部轴向焊接
剖面9 —10：上部/隔板长孔焊接
剖面11—12： 隔板/下部焊缝
剖面13—18： 轴套/上部焊缝
剖面13a—18a：轴套/下部焊缝
剖面19 —20：上部/下部焊接
剖面21—22： 上部处的SGR加强件焊接
剖面 P： 上部/下部点焊
剖面 P5：隔板/下部点焊 图12 副车架焊缝剖面图(示例) Figure 12 Section Plane of Welded Seam of Sub-frame (Example)
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SMTC 21549?2010
No. Connection member
Section plane 1 — 8：upper/lower axial welding
Section plane 9 —10：upper/partition board long hole welding
Section plane 11—12： partition board/lower welded seam
Section plane 13—18： axial sleeve/upper welded seam
Section plane 13a—18a：axial sleeve/lower welded seam
Section plane 19 —20：upper/lower welded seam
Section plane 21—22： upper SGR reinforced piece welding
Section plane P： upper/lower spot welding
Section plane P5：partition board/lower spot welding
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