A kind of extruding new method of highly-efficient processing straight spur gear
The invention belongs to a kind of Warm Extrusion precision form new technology and Tool and Die Technology of gear, for improving the working (machining) efficiency of straight spur gear.
At present, the production of most straight spur gear adopts traditional cutting working method mostly, but it has a lot of defects, as: stock utilization is low, and cost is high, and working (machining) efficiency is low.Along with the development of mechanical industry and intensifying of international competition, the reduction of the raising of the performance of gear product and processing cost is had higher requirement, especially the raising of working (machining) efficiency.Therefore the extruding of gear and forging and molding technology have obtained paying attention to and development.This type of processing method is brought up to more than 70% by the stock utilization of original traditional handicraft processing method 40%, and the strength of gear teeth also improves 20%, and it is about 40% that working (machining) efficiency improves, but this type of processing method all adopts single-piece production processing method, its working (machining) efficiency needs further to be promoted.For this reason, inventor has proposed a kind of extruding new method of highly-efficient processing straight spur gear.
The extruding new method of this highly-efficient processing straight spur gear is that to take the Warm Extrusion precision form new technology of gear and Tool and Die Technology be basis, the hollow strip straight spur gear of continuously extruded shaping pipe in vertical extruder, then adopts the method for line cutting that continuously extruded drip molding is cut into gear finished parts.This kind of method is the technique that adopts continuous Warm Extrusion precision form, produce the product that as far as possible approaches gear net shape, therefore this kind of processing method not only has material-saving, the significant advantage such as energy-conservation, low-cost, and can improve mechanical property and the processing characteristics of gear, in addition, owing to adopting the continuously extruded shaping of ferrous metal vertical extruder, then adopt line to be cut into gear finished product, than single-piece extrusion molding, there is higher working (machining) efficiency.
In the accurate progressive forming new technology of this Warm Extrusion and Tool and Die Technology, adopt the manufacture of the accurate progressive forming method of Warm Extrusion to approach the hollow strip straight spur gear pipe fine forge piece of gear part shape, more traditional Precise Cold-extrusion method working (machining) efficiency is high, and the surface quality and the mechanical property that compared with thermal extrusion moulding method, obtain are good.In Design of Dies, adopt on die and put and be convenient to continuously extruded shaping, facilitate feeding simultaneously, and Die Design is become to prestressing combination die, can offset the tangential stress producing while partially or completely offsetting mold work, thereby improve the intensity of whole die, and the life-span that can improve mould, and when die inner ring produces mill an ancient egg-shaped, holed wind instrument or crackle, only need to change die inner ring, greatly saved mold materials.Above-mentioned new technology makes the precise extrusion molding of straight spur gear, and the mechanical property of the part that not only can obtain gets a greater increase, but also has higher production efficiency.Therefore, the extruding new method of the hollow straight spur gear of this highly-efficient processing has good use value and development prospect.
Summary of the invention
The object of patent of the present invention is: for the problems referred to above, overcome material poor efficiency, high manufacturing cost and the lower working (machining) efficiency of straight spur gear processing.In ferrous metal vertical extruder, adopt continuous Warm Extrusion precision form, then adopt line to be cut into gear finished parts.With continuous Warm Extrusion accurate forming method, manufacture hollow strip straight spur gear pipe, more traditional forming technique has reduced the cutting output of rear operation, has reduced the consumption of the material energy.Continous way Warm Extrusion precision form, can squeeze out very long gear tubes fine forge piece through a warm-extrusion forming, then through line, cut into gear finished parts, more traditional single-piece extrusion forming method, can reduce manufacturing procedure, further improve the working (machining) efficiency of gear.
The technical scheme of patent of the present invention is: the present invention is a kind of extruding new method of highly-efficient processing straight spur gear, comprises the set-up procedure of blank, continuous warm-extrusion forming process, three corresponding stages of line cutting forming process.
The set-up procedure of blank mainly comprises rod iron blanking, material softening annealing, bead blasted surfaces treatment process, washing, phosphatization and saponification process; Continuously Warm Extrusion process mainly comprises with the technique that realizes material and be full of tooth cavity, puts, and adopt combined die on mould die, increase strength of concave mould, and die is comprised of guide ring, extrusion chamber and forming cavity.Line cutting forming process is mainly that continuous warm-extrusion forming part is cut into many gear finished products.
Adopt this kind of scheme, by the gear member of the longer size of continuous Warm Extrusion accurate forming method once-forming, then line cuts final formed gear finished parts.This new technology can realize higher Gear Processing efficiency.
As a modification of the present invention, adopt on die and put, in ferrous metal vertical extruder, by the mould continuous warm-extrusion forming spool gear pipe fine forge piece that makes progress, then adopt line cutting forming gear finished parts.
Adopt this kind of scheme, be not only conducive to improve size, form accuracy and the mechanical property of straight spur gear part, the service life of mould, and can further improve the working (machining) efficiency of gear.
accompanying drawing explanation:
In conjunction with the accompanying drawings and embodiments specific embodiment of the invention scheme to be described in detail below.
Fig. 1 is the simple schematic diagram of processing technology of the present invention;
Fig. 2 is process schematic three dimensional views of the present invention;
Fig. 3 extrusion die die of the present invention schematic diagram;
Fig. 4 is Warm Extrusion precision forming mold schematic diagram of the present invention;
Being labeled as in above-mentioned figure:
Fig. 3 is 1. forming cavity of extrusion die die of the present invention, 2. extrusion chamber, 3. die socket, 4. internal layer die, 5. stiffening ring.
Fig. 4 is 1. upper bolsters of temperature extension mould schematic diagram of the present invention, 2. die backing plate, 3. stiffening ring, 4. die socket, 5. guide pin bushing, 6. punch retainer plate, 7. convex mould base, 8. die shoe, 9 workpiece, 10. interior die, 11. screws, 12. punch, 13. die glands, 14. punch centring rings, 15. guide pillars, 16. lower bolsters, 17. screws.
The invention has the beneficial effects as follows: the present invention is owing to adopting continuous Warm Extrusion once-forming and wire cutting technology, in die, adopted guide ring, extrusion chamber and forming cavity, be convenient to tooth forming more, and warm-extrusion forming technique has higher working (machining) efficiency than single-piece extrusion forming process continuously.
The specific embodiment
Fig. 3 is the die of continuous warm extrusion forming die, in this die, is designed with guide ring, extrusion chamber and forming cavity.Guide ring plays a part directed, and extrusion chamber, between guide ring and forming cavity, works to reduce forming pressure.Forming cavity is for the shaping of profile of tooth.
Fig. 4 is warm extrusion forming die of the present invention, and this mould adopts on die and puts, and is placed in metal vertical extruder, metal stock is after the continuously extruded shaping of extrusion chamber, by upper bolster hole top, taken out, warp cutting action then, cuts into the gear finished parts of many same specifications.
Equipment required for the present invention is ferrous metal vertical extruder.