CN203221170U - Asymmetric large-diameter straight toothed spur gear cold precision forming device - Google Patents
Asymmetric large-diameter straight toothed spur gear cold precision forming device Download PDFInfo
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- CN203221170U CN203221170U CN 201320208925 CN201320208925U CN203221170U CN 203221170 U CN203221170 U CN 203221170U CN 201320208925 CN201320208925 CN 201320208925 CN 201320208925 U CN201320208925 U CN 201320208925U CN 203221170 U CN203221170 U CN 203221170U
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Abstract
An asymmetric large-diameter straight toothed spur gear cold precision forming device is characterized in that the device comprises a moving female die formed by a movable cross beam and a female die arranged in a die placing cavity arranged in the middle of the movable cross beam, and the movable cross beam is arranged on a machine base through an oil cylinder which is symmetrically and vertically arranged; an upper outer puncher pin, an upper middle puncher pin and an upper inner puncher pin are arranged above the female die in sequence from outside to inside in a mode of being coaxial with the female die, the upper outer puncher pin is of a hollow cylindrical structure, the upper middle puncher pin is of a hollow cylindrical structure and is driven by an upper middle oil cylinder of an annular structure, and the upper inner puncher pin is of a cylindrical structure and is driven by an upper inner oil cylinder; a lower outer puncher pin, a lower middle puncher pin and a lower inner puncher pin are arranged below the female die in sequence from outside to inside in a mode of being coaxial with the female die, the lower outer puncher pin is of a hollow cylindrical structure, the lower middle puncher pin is of a hollow cylindrical structure and is driven by a lower middle oil cylinder of an annular structure, and the lower inner puncher pin is of a cylindrical structure and is driven by a lower inner oil cylinder; the outer diameter of the upper outer puncher pin and the outer diameter of the lower outer puncher pin are both smaller than the inner diameter of the die cavity of the female die.
Description
Technical field
The utility model belongs to cold precision forming technology in the machine industry, specifically is a kind of asymmetric major diameter straight spur gear cold precision forming device that is applicable to that the complicated straight spur gear of major diameter (more than the tip diameter 150mm) asymmetrical shape is produced.
Background technology
At present H/D(height H and diameter D) bigger gear can not be the engineering difficulty with the solution of forward extrusion method, but the roller gear great majority are flat flats, asymmetric major diameter straight spur gear is complex-shaped and asymmetric, gear spoke and center counterbore need forge, gear is both ends of the surface boss height difference up and down, and these all bring great difficulty to gear forming.General H/D＜1/2～1/10, and the platypelloid type gear, can only adopt the drift of band profile of tooth, jumping-up blank in the profile of tooth die, make the blank Radial Flow and be shaped, as shown in Figure 1, because the profile of tooth of die 7 progressively narrows down, so critical path is full of profile of tooth to flowing be quite difficult, or the quite high compression that adds of needs (can be up to 3000～4000Mpa), mould is held can't stand, the highest allowable stress of cold forging die is generally≤2500Mpa, so the maximum difficult point of roller gear cold forming is to seek to make profile of tooth to be full of and the stressed cold forming method that is no more than tolerance zone of mould.
What at present both at home and abroad research was many is the cold forming method of research straight spur gear, because it and helical gears shaping have the high problem of shaping stress equally.Fig. 2 is the artwork of the two step method cold forming gear of Japan, first step elder generation preform, the preform blank that is shaped and is not full of profile of tooth, it is high that the gear that aspect ratio is shaped is eventually wanted, then this blank punching, the preform blank that this is with holes carries out the shaping eventually of second step again, reduce shaping stress with mesopore shunting shaping, make the shaping Stress Control at the mould allowable stress range, other country is also studied with similar two step method, China University Of Nanchang carries out simulated test with materials such as Al, Pb to differing formed method, but does not all test with steel.Certain university goes on foot forming processes with two, the measure of mesopore shunting decompression, and its shaping stress is still up to 3000Mpa.Japan scholar Koji Harada; Hisanobu Kanamaru two people have studied the cold forming method (U.S. Patent number: 5746085), adopt two-way upsetting squeeze method of two steps to be shaped, as shown in Figure 3 of helical gears.The first shape of helical gears of the two-way shaping of the first step, second step carry out two-way shaping at the beginning of shape upset into final products (H〉h), with two step cold forming process complexity, need preform, be shaped eventually, what have needs intermediate annealing and lubricates.To put into relatively difficulty of helical teeth die to the first base of preformed helical gears again, be not easy to commercial Application.Domestic more than the research of pinion to diameter, the cold-forging technique of gear wheel in large diameter is studied genus blank still.
Summary of the invention
The purpose of this utility model is just in order to overcome above-mentioned existing in prior technology problems and shortcomings, and research provides a kind of asymmetric major diameter straight spur gear cold precision forming device, this device can one the asymmetric major diameter straight spur gear of step direct forming, its formed gear precision reaches 8 grades.
The purpose of this utility model is achieved through the following technical solutions:
Asymmetric major diameter straight spur gear cold precision forming device of the present utility model comprises by moving beam, be installed in the mould that moving beam middle part arranges lays the motion die that the die in the chamber is formed, and described moving beam is installed on the support by the oil cylinder of symmetry, vertically setting; Above described die with the mode with the die coaxial line be disposed with from outside to inside the hollow cylindrical structure on outer ram, by loop configuration in hydraulic oil cylinder driving the hollow cylindrical structure in drift, pass through on the column construction that drives of inner cylinder on inner punch; Below described die with the mode with the die coaxial line be disposed with drift in the following outer ram of hollow cylindrical structure, hollow cylindrical structure following by hydraulic oil cylinder driving in loop configuration following from outside to inside, by the following inner punch of the column construction of inner cylinder driving down; And the described external diameter of going up outer ram and following outer ram is all less than the internal diameter of die die cavity.
Since the utility model in single action press adopts, in, the two-way controlled upsetting squeeze mode of outer ram, under the forcing press operation, each punch stroke is controlled adjustment by hydraulic jack under certain limit, make gear blank one step forming in cold mold material intensity allowable stress (2500Mpa) scope go out the asymmetric major diameter straight spur gear that profile of tooth is full of.
Utilize building mortion of the present utility model, in replacing with down, in, outer ram and die can two-way other Shape Parts of controlled upsetting extrusion.
The beneficial effects of the utility model are as follows:
1, the technology quick-reading flow sheets is short, reaches the purpose of efficient, energy-conservation, the material-saving of cold precision forming;
2, only need a cover shaping mould bases of one-step method, the asymmetric major diameter straight spur gear that can be shaped has been saved mold materials and has been processed non-usefulness;
3, the utility model is compared with existing helical gear cold forming device, be provided with a controlled moving beam, make the motion of die controlled in real time, different rates up and down when regulating two-way crowded rammer, reach the asymmetric roller gear purpose of shaping form, the also roller gear of the suitable speed ratio shaping form symmetry of adjustable integration, so range of application has enlarged, difform straight-tooth, helical gears can be shaped.Because in being provided with up and down, middle oil cylinder, up and down in, the movement of middle drift can free adjustment, can regulate the branch fluid space as required, gear or other forging that shaping form is complicated;
4, form of gear tooth precision height, the production efficiency height.
Description of drawings
The helical gears upsetting squeeze Radial Flow shaping schematic diagram of Fig. 1 prior art.
Among the figure: 1 ' is drift, and 2 ' is die, and 3 ' is blank, and 4 ' is backing plate.
The artwork of the two step method cold forming gear of Fig. 2 Japan.
Fig. 3 United States Patent (USP) two step shaping helical gears patent artworks.
Fig. 4 is the blank schematic diagram.
Fig. 5 building mortion schematic diagram of the present utility model.
Sequence number among Fig. 4,5: 1 is press ram, and 2 is last middle oil cylinder, and 3 is last outer ram, drift on 4,5 is last inner cylinder, 6 is last inner punch, 7 is die, and 8 is moving beam, and 9 is formed gear, 10 are following inner punch, and 11 are drift in down, and 12 are outer ram down, 13 are following inner cylinder, and 14 be die shoe, and 15 are down middle oil cylinder, 16 are moving beam control oil cylinder, and 17 is support, and 18 is blank.
The specific embodiment
The utility model is further described below with reference to embodiment (accompanying drawing):
Shown in Fig. 4,5, asymmetric major diameter straight spur gear cold precision forming device of the present utility model comprises by moving beam 8, be installed in the mould that moving beam middle part arranges lays the motion die that the die 7 in the chamber is formed, and described moving beam 8 is installed on the support 17 by the oil cylinder 16 of symmetry, vertically setting; Above described die 7 with the mode with the die coaxial line be disposed with from outside to inside the hollow cylindrical structure on outer ram 3, by loop configuration in the hollow cylindrical structure that drives of oil cylinder 2 in drift 4, pass through on the column construction that drives of inner cylinder 5 on inner punch 6; Below described die 7 with the mode with the die coaxial line be disposed with the following outer ram 12 of hollow cylindrical structure from outside to inside, the hollow cylindrical structure that drives by oil cylinder in loop configuration following 15 following in drift 11, by the following inner punch 10 of the column construction of inner cylinder 13 drivings down; And the described external diameter of going up outer ram 3 and following outer ram 12 is all less than the internal diameter of die 7 die cavitys.
The utility model is further described below with reference to operation principle and the technological process of accompanying drawing to device:
When carrying out the upsetting squeeze operation, after blank 18 put into die 7, press ram 1 is descending, when last middle drift 4 touches blank 18, the beginning extrusion blank, moving beam 8 also moves down by given pace simultaneously, middle drift 4 up and down, 11 by middle up and down oil cylinder 2,15 head on, so drift 4 up and down, 11 begin two-way upsetting squeeze simultaneously, after getting into certain depth, middle oil cylinder 2 up and down, oil pressure rises to when setting up oil pressure in 15, begin by the oil pipe oil extraction, moving beam 8 stops to move down, middle drift 4 up and down, stop behind the 11 slow astern set a distances, last inner punch 6 is headed on by last inner cylinder 5 and moves down, this is inner punch 10 at present, drift 11 down, drift 4 is headed on motionless in going up by oil cylinder, after last inner punch 6 is got into certain depth, inner cylinder 5 up and down, 13 reach when setting up oil pressure and begin by the oil pipe oil extraction, inner punch 6 stops extruding on this moment, press ram 1 is descending subsequently, last outer ram 3 contact blanks 18, and moving beam 8 moves down simultaneously, outer ram is got into to blank simultaneously up and down, finishes up to gear forming.When last inner punch, when the shaping stress of outer ram extrusion blank shaping profile of tooth further improves up and down, because an action that retreats is arranged before the drift up and down, formed certain branch fluid space, excess metal flows to this space, reach the purpose of shunting decompression, thereby effectively reduce shaping stress, make the shaping stress drop to fair stress (2500Mpa) scope of cold mold material intensity, so can in industrial production, obtain practical application.Profile accuracy can reach 8 grades, and concerning most of gear, the flank of tooth can not reprocessed, and the gear high to required precision can add postorder shaving or roll flute operation.Behind the gear forming, press ram 1 backhaul is up, and moving beam 8 also backhaul is up, and following inner cylinder 13 oil-feeds eject gear 9 from die 7.Put into blank 18 again, repeat above action.
Claims (1)
1. asymmetric major diameter straight spur gear cold precision forming device, it is characterized in that: described device comprises by moving beam, be installed in the mould that moving beam middle part arranges lays the motion die that the die in the chamber is formed, and described moving beam is installed on the support by the oil cylinder of symmetry, vertically setting; Above described die with the mode with the die coaxial line be disposed with from outside to inside the hollow cylindrical structure on outer ram, by loop configuration in hydraulic oil cylinder driving the hollow cylindrical structure in drift, pass through on the column construction that drives of inner cylinder on inner punch; Below described die with the mode with the die coaxial line be disposed with drift in the following outer ram of hollow cylindrical structure, hollow cylindrical structure following by hydraulic oil cylinder driving in loop configuration following from outside to inside, by the following inner punch of the column construction of inner cylinder driving down; And the described external diameter of going up outer ram and following outer ram is all less than the internal diameter of die die cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320208925 CN203221170U (en) | 2013-04-24 | 2013-04-24 | Asymmetric large-diameter straight toothed spur gear cold precision forming device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320208925 CN203221170U (en) | 2013-04-24 | 2013-04-24 | Asymmetric large-diameter straight toothed spur gear cold precision forming device |
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| CN203221170U true CN203221170U (en) | 2013-10-02 |
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| CN 201320208925 Withdrawn - After Issue CN203221170U (en) | 2013-04-24 | 2013-04-24 | Asymmetric large-diameter straight toothed spur gear cold precision forming device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192016A (en) * | 2013-04-24 | 2013-07-10 | 郑州机械研究所 | Cold precision forming device for asymmetric large-diameter spur gears |
-
2013
- 2013-04-24 CN CN 201320208925 patent/CN203221170U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192016A (en) * | 2013-04-24 | 2013-07-10 | 郑州机械研究所 | Cold precision forming device for asymmetric large-diameter spur gears |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131002 Effective date of abandoning: 20150805 |
|
| RGAV | Abandon patent right to avoid regrant |