World Wide Construction Division
Standards 世界建筑分支标准
DTW 788
Bushing Design Recommendations 轴套设计意见
x APPROVED FOR SUPPLIER DISTRIBUTION INTERNAL TO DEERE ONLY 供应商分布批准,仅供DEERE内部使用
Printed or saved copies are considered to be uncontrolled.打印件和复印件同样受控。
Scope:范围
This specification covers requirements for bushing designs.该标准适用于轴套设计要求
1. Bushing Class衬套等级
There will be two class of bushings:
衬套有两个等级
1.1. Class "A" Bushing: Heat treated, precision hard ground outside and inside
diameters.
“A”类衬套:热处理,精密磨加工和内直径处理。
1.2. Class "B" Bushing: Heat treated, precision hard ground outside diameter and 淑女培训bored inside diameter.
“B”类衬套:热处理,精密磨加工外径和钻孔内径。
2. Materials 材质
Low carbon steels are required. Any such steel lected must be able to meet the heat treatment specification given on the part print, when inspected according to RES10410. Examples of heat treatment specifications are given in Section 4.1 below.
必需是低碳钢。此类钢的选择必须能够满足热处理规范部关于零件打字要求,检查时根据RES10410。热处理规范的例子在下面的第4.1节中给出。
Thicker-walled bushings may require steel chemistry grades with incread heat treat respon. One possible t of low carbon steels, in order of increasing heat treat respon, includes JDM 1018, JDM 1026, JDM 1117, DIN ST52.3, JDM 15B21 and JDM 8620. JDM 8620 is required for bushings having wall thickness of 10 mm or larger.
厚壁轴套,随着热处理的不同反应,可能要求化学等级检测。低碳钢的一个可能的反应等级就是,依次为:JDM 1018, JDM 1026, JDM 1117, DIN ST52.3, JDM 15B21 and JDM 8620。JDM 8620要求10毫米或更大的轴套厚壁。
Any high mangane (over 1.00%), boron treated, or alloy steel lected must conform to JDM A0 quality level QL-2. Resulfurized steels (such as JDM 1117) and plain carbon steels (such as JDM 1018 and JDM 1026) are accepted as JDM A0 quality level QL-1.cold
任何高锰(1%以上),硼处理,或合金钢的选择必须符合JDM A0质量水平QL-2。硫化钢
(如JDM 1117)和普通碳素钢(如JDM 1018 and JDM 1026)是公认的JDM A0质量水平QL-1。
英语情景剧
When bushings are manufactured from steel tubing, JDM A25B Cold Drawn Seamless Mechanical Steel Tubing or JDM A24B4 Electric-Resistance Welded DOM Mechanical Steel Tubing are the preferred tubing forms. JDM A27A or JDM A27B Cold Drawn Butt Welded Mechanical Steel Tubing may also be ud. When bushings are manufactured from steel bar material, hot rolled or cold drawn bars may be ud.
当轴套是由钢管制成,JDM A25B冷拔无缝机械钢管或JDM A24B4电阻焊DOM机械钢管是首选的管材形式。JDM A27A or JDM A27B 冷拔钢管在焊接机械中也可使用。当轴套是由钢筋材料制造,热轧或冷拔棒也可采用。
3. Tolerance and Finishes 公差和表面处理
3.1 Class "A" Bushings A 类轴套标准英语口语面试
3.1.1 Outside Diameter: Tolerance shall be ± 0,013 mm [±.0005 IN.] with a
surface finish of 1.6 μm [63 μ IN.] maximum.
外径:公差应为0013 mm [ 0005英寸],最大表面光洁度为1.6μm [ 63μm ].。
3.1.2 Inside Diameter: Tolerance shall be ± 0,025 mm [±.001 IN.] with a
surface finish of 1.6 μm [63 μ IN.] maximum.
内径:公差应为0025 mm [ 001英寸],表面光洁度为1.6μm [ 63μm ]最大值。
3.1.3 Concentricity: I.D. and O.D. shall be concentric (total indicator reading) as determined by the following formula:
同心度:内径和外径应同心(总读数)由以下公式计算:
.01 x length of bushing with a minimum value of 0,08 mm [.003 IN.] so what什么意思
01 x轴套长度,最小值0,08毫米003。IN]mobilephone
3.2 Class "B" Bushings B类轴套
3.2.1 Outside Diameter: Tolerance shall be ± 0,013 mm [±.0005 IN.] with a
surface finish of 1.6 μm [63 μ IN.] maximum.
外径:公差应为0013 mm [ 0005英寸],最大表面光洁度为1.6μm [ 63μm ].。
3.2.2 Inside Diameter: Tolerance shall be ± 0,13 mm [±.005 IN.] with a
surface finish of 3.75 μm [150 μ IN.] maximum.
内径公差应±0,13毫米[±。005IN]以3.75米150μμ[中]最大的表面光洁度。
3.2.3 Concentricity: I.D. and O.D. shall be concentric within 0,25 mm [.010 IN.]
total indicator reading.
同心度:内径和外径应在0.25毫米[010 IN]总读数。贵阳六中英语实验学校
4. General Requirements 总体要求
4.1 Heat Treatment 热处理
4.1.1 Class "A"
Heat treatment per JDV2怎么样才能让皮肤变白
热处理根据JDV2
HT10T (Inspect per RES10410)
HT10T(检验根据RES10410)
0.89+0.26/-0.13 Ca depth
热处理深度0.89+0.26/-0.13
0.50 Minimum ca on finished machine surfaces
机加工表面处理最低深度0.50
79 HRA min 最低79 HRA
4.1.2 Class "A"
4.1.2 等级A 最低 79 HRA
Heat treatment per JDV2
热处理根据JDV2
HT10T (Inspect per RES10410)
HT10T(检验根据RES10410)
1.40+0.26/0.13 Ca depth
热处理深度1.40+0.26/0.13
1.02 Minimum ca on finished machine surfaces
机加工表面处理最低深度1.02
79 HRA min 最低79 HRA
4.1.3 Class "B"
Heat treatment per JDV2
热处理根据JDV2
HT10T (Inspect per RES10410)
HT10T(检验根据RES10410)
0.64+0.26/-0.13 Ca depth
热处理深度0.64+0.26/-0.13
0.25 Minimum ca on finished machine surfaces
机加工表面处理最低深度0.25
whatisthematter88 HR15N min
最低88 HR15N
4.1.4 Class "B"
Heat treatment per JDV2
热处理根据JDV2
HT10T (Inspect per RES10410)