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DY core load bearing devices and mold design

System as follows: (1) charge. Activities of the die core 25 and 26 in the spring 3O, 1O under the effect of it is set up to position 19 because the adjustable center column and activities of core 26 is threaded, so it will also rise to 25 on the plane and die parallel position to form a profile of the charge cavity, into the powder and blowing 38 \No. 1 Total 22 1 Figure 3 Schematic diagram of the mold. Nuts and nut 2. Under the pallet 3. Putt 4. Horn 5. Nuts and nut 6. Base 7. Center guide sleeve 8. Under the plate 9. Limit board 10. Center spring l1. Au template 12. On the guide sleeve 13. Concave molded ring 14. Pressure adjusting nut 15. Lock nut 16. On the guide post 17. On the pallet 18. On the plate 19. Adjustable center column 2O. Positioning on the punch sets 21. Center rod 22. On the punch 23. Reel 24. Nuts and nut 25. Die 26. Including the moving core 27. Under the punch 28. Pressure adjusting nut 29. In the guide sleeve 30. Die floating spring 31. Spring column 32. The pillar �� \No. 1 Total 2239 level. (2) suppression. On the punch cylinder 22 on the machine and gradually into the concave molding under the powder compact, so dense starting powder. Meanwhile, activity-based die 25 and 26 formed in the powder and the wall friction and repression under pressure compression spring 3O, 1O down, pressed into a floating state. When the punch into the die on a certain depth,[link widoczny dla zalogowanych], the pressure intended, the upper die force role and activities of the die core and then move down so that in the limit block 9, respectively, formed under the fixed plate 8 forming size to complete the suppression process. (3) stripping. Increase the return on the punch 22, die 25, 26 core activities in the spring 3O, 1O simultaneously under the effect of rising up to the loading position of the die, core activities, it is set up to a certain height position, at the same time, blanks also increased with the core activities to a location concave cavity model, and finally rising from under the punch die 27,[link widoczny dla zalogowanych], 25 and 26 core activities will be blank ejection. After the completion of ejection, the next punch down to the loading position 27, into about a work cycle. 3-density compaction curves and adjust the blank mold is YA79-100 type (Shanghai Second forging machine tool plant) on supporting the use of press, to suppress the load bearing device of a raw material is clay or alumina silica refractory, sintering shrinkage 2.5% or less, the compaction curves shown in Figure 4. From Figure 3, Figure 4, the die height adjustment charge by the piece between 28 and 31 pieces of the threaded adjustment to achieve. Block and bottom load bearing wall thickness adjustment between the first charge density adjustment, piece by piece 5 and 21 to regulate the activities of core position in the loading level to ensure that when the second is to adjust the pressure by adjusting Die floating elastic and mandatory pillar on to achieve a floating device. In order to ensure the charge and the suppression of process automation, the center pole and adjustable center column is a combination of structure,[link widoczny dla zalogowanych], by the end threaded to ensure consistent and die on the plane. 4 Stripping design gradient and with the gap in order to facilitate mold release, the upper part of the die height of the loading height minus the blank with the size of a single segment. About stripping slope. Core activities of the key parts of the mold, the structure is also more complex, in the face and the cylindrical shape of the blank forming part of size H are equipped with a high degree of slope, the former 4. 3O \gap is an important issue in powder forming, forming one of the blank to ensure quality and avoid burrs; second powder which can guarantee the smooth discharge of gas in the molding, so that blanks do not appear on the air larvae L, layer cracking and other undesirable phenomena. At the same time, with the gap in the selection of the molded part to be able to ensure cooperation between the sports, so the mutual movement between the uniform and stable, with the gap can not be caused due to movement blocked situation. in the mold, we large selection of clearance fit. die and the upper and lower punch between the former H8/f7 tie, which sided with the gap for the 0.30ram, manufacturing tolerances and the former is the same; activities under the punch and between core with the clearance and manufacturing tolerances and die with the same between the lower punch; adjustable center column and activities G8/h7 match between core and ends in the shape (rough size of a H2 HI) with 2.'s stripping slope. 5 Conclusion The mold and die for domestic Hydraulic presses, and simple structure, reliable,[link widoczny dla zalogowanych], easy to process, the assembly process is good. in the suppression of the time on loading and easy to adjust the structure size and shape,[link widoczny dla zalogowanych], green density can be achieved and the suppression of blanks consistency. through the use of more than a decade of production is the production of high-quality proof of the mold load bearing device DY core technology and equipment to suppress the good. 0510152025 time T (s�� Figure 4 Schematic diagram of compaction curves

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