CN103658500A - Precise warm forging one-time forming new technology of straight tooth cylinder inner gear - Google Patents
Precise warm forging one-time forming new technology of straight tooth cylinder inner gear Download PDFInfo
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- CN103658500A CN103658500A CN201310667865.9A CN201310667865A CN103658500A CN 103658500 A CN103658500 A CN 103658500A CN 201310667865 A CN201310667865 A CN 201310667865A CN 103658500 A CN103658500 A CN 103658500A
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Abstract
The invention discloses a precise warm forcing one-time forming new technology of a straight tooth cylinder inner gear. Annular blank is placed into a combined female die, a die goes downwards, and a male die enters the center of the annular blank. The outer-tooth-shaped male die is combined with an inner-tooth-shaped back pressure sleeve to exert pressure so as to force the blank to divert under the action of extrusion force. One part of the blank flows towards the outer-tooth-shaped male die, so that a tooth shape is filled, and another part of the blank flows outwards, flowing diversion of materials is achieved, and extrusion loads are reduced. When the die goes upwards, a board and a back pressure block can be kept still within certain time under the action of spring elastic force, a workpiece attached to the tooth-shaped male die can be taken off, and if the workpiece is attached to the inner wall of the female die, the workpiece can be ejected out by an ejector rod. The straight tooth cylinder inner gear with high quality can be fast and efficiently formed with the die, meanwhile, the blank heating temperature of the whole technology is below the recrystallization temperature, an oxide skin will not exist on a forged piece, the size precision of the forged piece is high, the mechanical property is good, the service life of the forming die is long, and work is stable.
Description
Technical field
The invention belongs to a kind of accurate warm forging new technology of Spur Internal Gear, for speed change and the transmission mechanism of precision equipment.
Background technology
Traditional Gear Production adopts traditional cutting working method mostly, and stock utilization is low, and product cost is high.The existing processing method of internal gear is mainly machine cut processing, mainly comprises: boring, rough turn endoporus, finish turning endoporus, gear shaping etc. by traditional production technology.Wherein with regard to gear shaping, the machining length that takes time, and also stock utilization is low, and waste is serious.In addition, traditional machine cut technique not only exists manufacturing procedure more, and process route long material utilization rate is low, and cost is high, and working (machining) efficiency is low, and the uniformity of the accuracy of gear is poor, and owing to adopting machining, mechanical mechanics property is poor.The extrusion forming process of gear is developed in recent years, but adopt repeatedly forming technology more, increased the number of times of technique, and mostly be the forming technology of external gear, for the once-forming technical study of internal gear but seldom, especially the accurate warm forging once-forming technique of internal gear.
In the accurate warm forging new technology of Spur Internal Gear, adopt warm precision forging method manufacture to approach the fine forge piece of gear part shape, forging precision that the single manufacturing process of more traditional enclosed finish forge, forge hot and cold forging etc. obtains is higher, shaping load is less and practicality is higher.Above-mentioned new technology makes automobile have higher production efficiency with the precision forging of straight spur gear, the mechanical property of the part obtaining gets a greater increase, therefore, the precision forging new technology of straight spur gear and mould have brighter use value and development prospect.
Summary of the invention
The object of patent of the present invention is to overcome the drawback of existing internal gear lathe machining production method, provide a kind of production process few, machining process route is short, and accuracy of gear uniformity is high, mechanical property is good, the accurate warm forging new technology of a kind of Spur Internal Gear that working (machining) efficiency is high.The forming technique that new method is more traditional has reduced the cutting output of rear operation, has reduced the consumption of the material energy.Adopt forging to produce gear, not only there is the significant advantages such as material-saving, energy-conservation, low cost and high efficiency, and contribute to form in the inside of gear densification, uniform material structure, along tooth profile, there is continuously reasonably metal streamline, form the tooth root of Surface Machining hardened layer and rounding off, thereby greatly improve wear-resistant, the erosion-resisting ability of gear and the bending strength of root, obviously improve the fatigue behaviour of gear.
In order to solve the problems of the technologies described above, the technical scheme of patent of the present invention is: the accurate warm forging once-forming new technology of a kind of Spur Internal Gear of the present invention, comprises the set-up procedure of blank, accurate two stages of warm forging once-forming process.The set-up procedure of material mainly comprises rod iron blanking, material softening annealing, bead blasted surfaces treatment process, washing, phosphatization and good fortune technique; Accurate warm forging once-forming process, the part contacting with workpiece by punch has profile of tooth, and blank produces shunting under the effect of back pressure piece power straight down, and a part flows inwards and forms profile of tooth, and a part outwards flows.Because the profile of tooth forming is easily attached on punch, between the stripper of this mould and upper bolster, be equipped with spring.When mould is up, spring is due to the elastic reaction of spring, and discharging version and back pressure piece can keep motionless within the regular hour, the workpiece being attached on die can be taken off.
Adopt this kind of scheme, by accurate warm forging once-forming making method, can realize the shaping processing of Spur Internal Gear, shaping dies long service life, stable working.
As a modification of the present invention, adopt back pressure soon when being shaped and punch be a force body to blank deformation, and when the demoulding by the back pressure head part demoulding fast.
The described material returned refers to: cold-extrusion shaping part is taken out from die.
The described demoulding refers to; Internal gear part is separated with profile of tooth drift.
The invention has the beneficial effects as follows: adopt accurate warm forging once-forming making method processing Spur Internal Gear, can produce the metal parts that approaches net shape, improved the utilization rate of material, reduced manufacturing procedure, improved working (machining) efficiency; Owing to adopting accurate warm forging once-forming making method processing Spur Internal Gear, metal streamline distributes by profile geometry, thereby product mechanical property is enhanced.
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 internal gear parts figure of the present invention.
The accurate warm forging once-forming of Fig. 2 the present invention making method schematic diagram.
Being labeled as in above-mentioned figure:
Fig. 2 is 1. external tooth form punch of the accurate warm forging once-forming of the present invention making method schematic diagram, 2. internal tooth form back pressure cover, 3. pressing plate, 4. back pressure spring, 5. combined die, 6. ground floor prestressing force lasso, 7. prestressing force lasso, 8. knock-pin for the second time.
The specific embodiment
Circular material blank is put into combined die (5), and external tooth form punch (1) is descending, and punch (1) enters the heart portion of circular material blank.External tooth form punch and internal tooth form back pressure cover issue stream estranged in conjunction with exerting pressure to force in extruding force effect, and a part flows and fills profile of tooth to external tooth form punch, and a part outwards flows, as shown in Figure 2.Incurrent part enters profile of tooth punch (1) and forms profile of tooth.When workpiece takes out, because workpiece likely can be attached on profile of tooth punch, between pressing plate (3) and upper bolster, be equipped with spring.When mould is up, under the effect of spring force, stripper and internal tooth form back pressure cover (2) can keep motionless within the regular hour, discharging spring applies demoulding Lee and the workpiece being attached on profile of tooth punch (1) can be taken off, if workpiece is attached on die (4) inwall, can eject with push rod (8).
Equipment required for the present invention is punching machine or hydraulic press.
Claims (3)
1. an accurate warm forging once-forming new technology for Spur Internal Gear, is characterized in that: whole technique comprises two processes: the set-up procedure of blank and accurate two corresponding stages of warm forging once-forming process.
2. the accurate warm forging once-forming new technology of a kind of Spur Internal Gear according to claim 1, it is characterized in that: accurate warm forging once-forming process process mainly comprises with the technique that realizes material and be full of tooth cavity, can realize external tooth form punch and internal tooth form back pressure cover and issue stream estranged in conjunction with exerting pressure to force in extruding force effect, a part flows and fills profile of tooth to external tooth form punch, a part outwards flows,, realized the mobile shunting of material, reduce extrusion load.
3. the accurate warm forging once-forming new technology of a kind of Spur Internal Gear according to claim 1, it is characterized in that: whole technique blank heating temperature is below recrystallization temperature, obtain forging processed and there will not be oxide skin, final forging ' s block dimension precision is high, mechanical property good, while shaping dies long service life, stable working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310667865.9A CN103658500A (en) | 2013-12-11 | 2013-12-11 | Precise warm forging one-time forming new technology of straight tooth cylinder inner gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310667865.9A CN103658500A (en) | 2013-12-11 | 2013-12-11 | Precise warm forging one-time forming new technology of straight tooth cylinder inner gear |
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| CN103658500A true CN103658500A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310667865.9A Pending CN103658500A (en) | 2013-12-11 | 2013-12-11 | Precise warm forging one-time forming new technology of straight tooth cylinder inner gear |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368741A (en) * | 2014-10-17 | 2015-02-25 | 江苏太平洋精锻科技股份有限公司 | Parking lock sheet gear closed type floating cold extrusion die |
| CN104826981A (en) * | 2015-05-11 | 2015-08-12 | 柳州金盾机械有限公司 | Straight tooth cylindrical gear precise forging process |
| CN111097872A (en) * | 2018-10-26 | 2020-05-05 | 财团法人金属工业研究发展中心 | Back pressure auxiliary forming module for forged products |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01317653A (en) * | 1988-06-15 | 1989-12-22 | Honda Motor Co Ltd | Method of molding cup-shaped product with internal teeth |
| CN1102144A (en) * | 1993-10-26 | 1995-05-03 | 青岛建筑工程学院 | Spur gear precision die stamping-push-press forming process and its equipment |
| JPH08155578A (en) * | 1994-12-08 | 1996-06-18 | Aichi Kiki Kk | Formation of gear |
| CN1799726A (en) * | 2005-12-17 | 2006-07-12 | 江苏飞船股份有限公司 | Gear warm finish forging process |
| CN102873124A (en) * | 2012-10-20 | 2013-01-16 | 无锡市神力齿轮冷挤有限公司 | One-off forming device for making gear workpiece with internal and external teeth |
| CN103157759A (en) * | 2011-12-09 | 2013-06-19 | 江苏威鹰机械有限公司 | Cylindrical gear warm-cold combined precision forging plastic molding process |
-
2013
- 2013-12-11 CN CN201310667865.9A patent/CN103658500A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01317653A (en) * | 1988-06-15 | 1989-12-22 | Honda Motor Co Ltd | Method of molding cup-shaped product with internal teeth |
| CN1102144A (en) * | 1993-10-26 | 1995-05-03 | 青岛建筑工程学院 | Spur gear precision die stamping-push-press forming process and its equipment |
| JPH08155578A (en) * | 1994-12-08 | 1996-06-18 | Aichi Kiki Kk | Formation of gear |
| CN1799726A (en) * | 2005-12-17 | 2006-07-12 | 江苏飞船股份有限公司 | Gear warm finish forging process |
| CN103157759A (en) * | 2011-12-09 | 2013-06-19 | 江苏威鹰机械有限公司 | Cylindrical gear warm-cold combined precision forging plastic molding process |
| CN102873124A (en) * | 2012-10-20 | 2013-01-16 | 无锡市神力齿轮冷挤有限公司 | One-off forming device for making gear workpiece with internal and external teeth |
Non-Patent Citations (1)
| Title |
|---|
| 胡浩等: "AX100摩托车起动齿坯的镦挤成形", 《金属成形工艺》, 31 December 1999 (1999-12-31), pages 36 - 38 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368741A (en) * | 2014-10-17 | 2015-02-25 | 江苏太平洋精锻科技股份有限公司 | Parking lock sheet gear closed type floating cold extrusion die |
| CN104826981A (en) * | 2015-05-11 | 2015-08-12 | 柳州金盾机械有限公司 | Straight tooth cylindrical gear precise forging process |
| CN111097872A (en) * | 2018-10-26 | 2020-05-05 | 财团法人金属工业研究发展中心 | Back pressure auxiliary forming module for forged products |
| CN111097872B (en) * | 2018-10-26 | 2021-08-24 | 财团法人金属工业研究发展中心 | Back pressure auxiliary forming module for forged products |
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Application publication date: 20140326 |