CN102248108B - Straight gear precision forging forming device with controllable floating female die movement - Google Patents

Straight gear precision forging forming device with controllable floating female die movement Download PDF

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Publication number
CN102248108B
CN102248108B CN 201110143833 CN201110143833A CN102248108B CN 102248108 B CN102248108 B CN 102248108B CN 201110143833 CN201110143833 CN 201110143833 CN 201110143833 A CN201110143833 A CN 201110143833A CN 102248108 B CN102248108 B CN 102248108B
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China
Prior art keywords
tooth
female die
punch
floating female
shaped
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Expired - Fee Related
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CN 201110143833
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Chinese (zh)
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CN102248108A (en
Inventor
杨程
章建军
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Priority to CN 201110143833 priority Critical patent/CN102248108B/en
Publication of CN102248108A publication Critical patent/CN102248108A/en
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Publication of CN102248108B publication Critical patent/CN102248108B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention relates to a straight gear precision forging forming device with controllable floating female die movement. The straight gear precision forging forming device comprises a tooth-shaped upper punch, wherein the tooth-shaped upper punch is fixed on an upper pressing plate; a middle compressing ring is sleeved on the outer surface of the tooth-shaped upper punch and is movably connected with the upper pressing plate through an upper spring and an upper discharging screw; the bottom of a tooth-shaped lower punch is fixed on a lower template; the internal tooth of a floating female die is matched with the external tooth on the tooth-shaped lower punch; the floating female die is movably connected with the lower template through a lower spring and a lower discharging screw; and springs with the same or different stiffness coefficients, an upper banking pin and a lower banking pin on the upper side and the lower side of the floating female die are used for controlling the movement ways of the floating female die, so that the movement ways that the floating female die is not moved in the forming process or is moved downwards at the same speed along with the tooth-shaped upper punch and the like can be realized. The flowing of a blank is influenced by the friction force between the die surface of the floating female die and the blank, so that the aim of improving the filling of tooth-shaped upper corners and tooth-shaped lower corners is fulfilled. The straight gear precision forging forming device has the characteristics of simple structure, high precision forming efficiency and energy saving, and is easy to apply industrially.

Description

The controlled spur gear precision forging device of a kind of floating cavity die motion
Technical field
The present invention relates to spur gear cold closed-die forging production technical field in the machine industry, be specifically related to the controlled spur gear precision forging device of a kind of floating cavity die motion.
Background technology
At present, the upsetting extrusion of little modulus straight gear both domestic and external, have material-saving, energy-conservation, the significant advantage such as processing cost is low, production efficiency is high, and can increase substantially product inherent quality and surface quality, but because profile of tooth filling difficulty, corner place particularly, need larger plastic force, cause that the concave die cavity wall pressure is excessive by force, cause die to ftracture easily, based on this, the Tuncer C of Britain Birmingham university and Dean T.A. proposed the floating cavity die principle with hollow forging stock finish forge straight spur gear in 1987; The Tan Xianfeng of University Of Nanchang, woods are controlled the utilization such as the gentle Jiang Xiongxin combined die that floats and have analyzed impact extrusion, upsetting squeeze, shunting upsetting squeeze, cored bar upsetting squeeze, transferred the forming modes such as face upsetting squeeze and the compound upsetting squeeze of hub part; The people such as the Zhengzhou machinery Liu Hua of institute utilize hydraulic means to realize that the two-way pier of floating cavity die squeezes blank, obtains required workpiece.The gear precision forging device that these utilize floating cavity die, what have can not realize that the floating cavity die motion mode is controlled, can realizing of having is controlled, but control device is complicated, has lost efficient, the energy-conservation characteristics of precision form, is difficult to realize commercial Application.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide the controlled spur gear precision forging device of a kind of floating cavity die motion, can solve lower corner filling hard problem on the profile of tooth, have simple in structure, efficiently, energy-conservation characteristics, be easy to realize commercial Application.
In order to achieve the above object, the technical scheme taked of the present invention is:
The controlled spur gear precision forging device of a kind of floating cavity die motion, comprise profile of tooth upper punch 5, the top of profile of tooth upper punch 5 is fixed on the top board 1, the bottom of profile of tooth low punch 8 is fixed on the lower bolster 9, middle pressure ring 4 is enclosed within the outside of profile of tooth upper punch 5, and by upper spring 3 and loading and unloading material screw 2 and top board 1 flexible connection, the external tooth on the internal tooth of floating cavity die 6 and the profile of tooth low punch 8 cooperates, and floating cavity die 6 is flexibly connected with lower bolster 9 by lower spring 10 and lower unloading bolt 12.
Uniform four upper limits nail 13 on the described top board 1.
Uniform four lower limit nail 11 on the described lower bolster 9.
Because the present invention adopts up and down the identical or different spring of the coefficient of stiffiness and the up and down motion of banking pin control floating cavity die floating cavity die, can realize floating cavity die different motor pattern in forming process, utilize floating cavity die die face and blank under the different motion pattern between frictional force affect flowing of blank, reach the purpose of improving lower corner filling on the profile of tooth, it is simple in structure, have efficient, the energy-conservation characteristics of precision form, be easy to realize commercial Application.
Description of drawings
Accompanying drawing is structural representation of the present invention, and its left half figure is expressed as the state before the shape; Right half figure is expressed as the state after the shape.
Specific embodiments
Below in conjunction with accompanying drawing the present invention is described in detail.
With reference to the accompanying drawings, the controlled spur gear precision forging device of a kind of floating cavity die motion, comprise profile of tooth upper punch 5, profile of tooth upper punch 5 is fixed on the top board 1, move up and down with top board 1, profile of tooth low punch 8 is fixed on the lower bolster 9, middle pressure ring 4 is enclosed within the outside of profile of tooth upper punch 5, and by upper spring 3 and loading and unloading material screw 2 and top board 1 flexible connection, guarantee that upper spring 3 has certain precompression, external tooth on the internal tooth of floating cavity die 6 and the profile of tooth low punch 8 cooperates, be enclosed within the outside of profile of tooth low punch 8, and can slide up and down along profile of tooth low punch 8, floating cavity die 6 is flexibly connected with lower bolster 9 by lower spring 10 and lower unloading bolt 12, guarantees that lower spring 10 has certain precompression.
Uniform four upper limits nail 13 on the described top board 1.
Uniform four lower limit nail 11 on the described lower bolster 9.
Operation principle of the present invention is:
Blank 7 is placed on the profile of tooth low punch 8, and top board 1 drive profile of tooth upper punch 5 and middle pressing plate 4 are descending, and blank 7 is pushed:
1) with the Height Adjustment of upper limit nail 13 to making its lower surface push up the upper surface of middle pressure ring 4, and the height of lower limit nail 11 is turned down, when top board 1 is descending when blank is pushed, can realize floating cavity die 6 and top board 1 synchronized descending motion mode this moment, the frictional force of 6 pairs of blanks of floating cavity die is downward, is conducive to improve the filling of lower corner;
2) with the Height Adjustment of lower limit nail 11 to making its upper surface push up the lower surface of floating cavity die 6, and the height of upper limit nail 13 is turned down, when top board 1 is descending when blank is pushed, can realize floating cavity die 6 fixed motion mode in shaping this moment, the frictional force of 6 pairs of blanks of floating cavity die upwards is conducive to improve the filling of upper corner;
3) height of the outstanding die face of upper limit nail 13 and lower limit nail 11 is turned down, and upper spring 3 adopts identical spring and has identical precompression with lower spring 11, when top board 1 is descending when blank is pushed, the downstream rate that can realize floating cavity die 6 is half the motion mode of speed of profile of tooth upper punch 5;
4) height of upper limit nail 13 outstanding die faces is turned down, and lower limit nail 11 is adjusted to suitable height, upper spring 3 adopts the larger spring of the coefficient of stiffiness, and lower spring 10 adopts the less spring of the coefficient of stiffiness, and the precompression of upper spring 3 is greater than lower spring 10, floating cavity die 6 under the acting in conjunction of upper spring 3 and lower spring 10 moves downward the shaping initial stage like this, in case the floating cavity die 6 descending lower limit nails 11 that run into, floating cavity die 6 is no longer descending, 5 pairs of blanks of the top board 1 descending promotion profile of tooth upper punch of continuation this moment push, upper spring is compressed for 3 this moments, until be shaped, can realize that floating cavity die 6 is descending at the shaping initial stage, and at the motionless motion mode of later stage that is shaped.

Claims (1)

1. the controlled spur gear precision forging device of floating cavity die motion, comprise profile of tooth upper punch (5), the top of profile of tooth upper punch (5) is fixed on the top board (1), the bottom of profile of tooth low punch (8) is fixed on the lower bolster (9), it is characterized in that: middle pressure ring (4) is enclosed within the outside of profile of tooth upper punch (5), and by upper spring (3) and loading and unloading material screw (2) and top board (1) flexible connection, external tooth on the internal tooth of floating cavity die (6) and the profile of tooth low punch (8) cooperates, and floating cavity die (6) is flexibly connected with lower bolster (9) by lower spring (10) and lower unloading bolt (12);
Upper uniform four the upper limits nails (13) of described top board (1);
Upper uniform four the lower limit nails (11) of described lower bolster (9).
CN 201110143833 2011-06-01 2011-06-01 Straight gear precision forging forming device with controllable floating female die movement Expired - Fee Related CN102248108B (en)

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Application Number Priority Date Filing Date Title
CN 201110143833 CN102248108B (en) 2011-06-01 2011-06-01 Straight gear precision forging forming device with controllable floating female die movement

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CN102248108B true CN102248108B (en) 2013-01-02

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102615236A (en) * 2012-04-05 2012-08-01 郑州机械研究所 Cold precision forming device for asymmetric cylindrical gear
CN102909304B (en) * 2012-10-29 2014-12-17 无锡晶心精密机械有限公司 Upsetting die for solid rods
CN103736903B (en) * 2014-01-22 2015-08-19 上海交通大学 Flanged pin planar gear accurate forming method and device thereof
CN107127244A (en) * 2017-06-23 2017-09-05 苏州西岩机械技术有限公司 A kind of friction welding overlap removal device and friction welding machine

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CN2684966Y (en) * 2003-12-09 2005-03-16 上海工程技术大学 Changeable mould die for moulding gear-teeth by liquid mould forging
CN101428326B (en) * 2008-12-08 2010-11-24 江苏太平洋精锻科技股份有限公司 Automotive reverse gear intermediate gear tooth form final finishing and back taper forming mould
CN201711484U (en) * 2010-07-08 2011-01-19 北京机电研究所 Precision forging mould for floating straight-tooth cylindrical gear
CN202097344U (en) * 2011-06-01 2012-01-04 西安建筑科技大学 Spur gear precision forging forming device with controllable motion floating die

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