- Hydraulic universal testing machine series
- Microcomputer controlled
- Microcomputer screen display type
- Digital display type
- WE-B type cylinder type
- Type WEW-D six column
- WAW-C worm electro-hydraulic servo
- Impact testing machine series
- Pendulum type impact
- The impact specimen notch broaching
- Impact specimen low temperature tank
- Impact specimen notch projector
- pendulum type impact
- Torsion testing machine series
- Material machine
- Wire torsion testing machine
- NDS series digital display
- metal wire
- wire winding tester
- NDW series microcomputer control material
- Spring testing machine series
- Manual double digital display
- Full automatic
- Computer controlled
- Spring torsion
- Spring fatigue
- Gas
- Pressure testing machine series
- Digital pressure
- Automatic pressure
- Manhole cover pressure
- microcomputer control constant
- electro hydraulic
- liquid crystal display type
- Steel strand testing machine
- Computer screen display
- Computer controlled
- vertical (horizontal) steel strand relaxation
- electro hydraulic servo
- screen display steel strand
- Ring steel test machine
- Microcomputer control
- Liquid crystal display
- liquid crystal display
- microcomputer control
- artificial board
- Artificial board universal
- manual artificial board
- artificial board scratch
- rolling wear
- artificial board universal
- falling ball impact
- Test machine parts
- Electronic extensometer
- DX-400 manual management
- Test machine parts -1
- Test machine parts -2
- Test machine parts -3
- Bending test machine
- reinforcing steel bar
- Steel tube
- Wire
- pipe bending
- reinforced bar
- double reinforced
金属线材反复弯曲试验机的操作步骤
试验一般在室温10℃-35℃内进行,对温度要求严格的试验,试验温度应为23℃±5℃。
根据不同线材直径,选择圆柱支座半径r,圆柱支座顶部至把杆底部距离h以及把杆孔直径d。
使弯曲臂处于垂直位置,将试样由把杆孔插入,试样下端用夹块夹紧,并使试样垂直于圆柱支座轴线。弯曲试验将试样弯曲90°,再向相反方向交替进行,将试样自由端弯曲90°,在返回至起始位置作为第一次弯曲。弯曲操作应以每秒不超过一次的均匀塑料平稳无冲击地进行,必要时,应降低弯曲塑料以确保试样产生的热?不致影响试验结果。试样中为确保试样与圆柱支座圆弧面的连续接触,可对试样施加某种形式的张紧力,除非相关产品标准中另有规定,施加的张紧力不得超过试样?公称抗拉强度相对应力值的2%。
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