Bending forming of the hottest 130mm extra thick p

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Bending forming of 130mm extra thick plate

bending forming of 130mm extra thick plate

1 Preliminary preparation

(1) weld lifting lugs at both ends of the workpiece

(2) draw the force action line every 100mm in the length direction of the workpiece

(3) pad a group of superimposed limit blocks directly below the force. The height of the limit block is 100.7mm,

2 Forming process

due to the lifting problem, it is necessary to bend about one-third of the length of one end of the workpiece first, then bend one-third of the length of the other end, and finally bend the middle part. Bending shows the great potential of recyclable and degradable packaging materials in the transfer and upgrading of the express industry. When bending, the force action line applies an impulse force every 100mm to bend, and then moves the bending one by one. During the bending process, pay attention to check the bending radian of the workpiece with the detection template at any time, that is, check the springback of the workpiece at any time

3. Treatment of problems

bend according to the above forming process. 1. Jinan experimental machine factory adjusts the height of the baffles on both sides of the pressure testing machine to keep them at a relatively horizontal position. If there is a deviation, it may affect the use of the pressure testing machine The curved arc-shaped plate is actually a polygonal arc-shaped plate. Due to the organic machining allowance, the cylinder can basically meet the machining requirements after assembly and welding. However, due to the equipment, sometimes the magnitude of the applied impulse pressure (actually the calibration of the workpiece) is different. The above of each stress line of the workpiece is the deformation of the tightening spring. The experimental operation procedures for working load test are called elastic deformation, and the local radian will exceed the predetermined value called elastic quantity. When checking the springback of workpiece bending with the test sample, if the springback is too large, lower the height of the limit block and press again; If the rebound is too small, replace the punch of the tooling, increase the height of the limit block, and press it for correction. Finally, put each piece on the ground sample for accurate detection, and then fine calibrate the parts that are still out of tolerance with flame

the principle of flame calibration is: first calibrate the places with large curvature difference with large flame energy, and then calibrate the places with small curvature difference with small flame energy. Therefore, use the template to detect the radius of curvature, find out the place where the radius of curvature differs the most, determine several points, connect them into a straight line, and use sufficient flame energy to calibrate with the line segment heating method. For places with little difference in curvature radius, the point heating method can be used

4. Assemble and weld into simplified

the semi-automatic cutting machine cuts off the process allowance of 500mm at both ends of the workpiece piece by piece, and cuts the X-shaped slope U. Draw the actual sample map of the mountain cylinder on the platform a, and close the three pieces into the cylinder according to the sample map. It has begun to take shape, and has become a new industry, spot assembly and welding

5. Conclusion

(1) the cold bending method introduced in this paper is successful in bending 130mm extra thick plate. Compared with the forming process of other medium and heavy plates, this process method increases the correction sequence of replacing the upper punch and adjusting the thickness of the limit block, in order to reduce the amount of flame fine correction

(2) without adding new equipment, using the existing equipment and giving full play to human advantages, the bending forming problem of extra thick plates is solved, which not only reduces the cost, but also accumulates valuable practical experience for further expanding the production capacity

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