CN207547509U - A kind of cold forging Extruding die - Google Patents
A kind of cold forging Extruding die Download PDFInfo
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- CN207547509U CN207547509U CN201721761237.7U CN201721761237U CN207547509U CN 207547509 U CN207547509 U CN 207547509U CN 201721761237 U CN201721761237 U CN 201721761237U CN 207547509 U CN207547509 U CN 207547509U
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- cavity die
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- fixed guide
- lower cavity
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Abstract
The utility model discloses a kind of cold forging Extruding die, upper mold positioning is set in fixed guide circle and can be moved up and down under external force along fixed guide circle inner wall, and nitrogen gas spring is arranged between upper mold positioning sleeve and movable upper cavity die；The axially extending bore circle set of movable upper cavity die and lower cavity die for two coaxial cooperations, movable upper cavity die is connect with fixed guide circle, fixed guide circle is fixed in top mold frame, and top mold frame is connect with mould bases guide sleeve, and mould bases guide sleeve is sleeved on guide post and can be moved up and down under external force along guide post；Pressure block is located at the bottom of lower cavity die, and ejector beam extends vertically through pressure block and enters lower cavity die die cavity.Sun gear is shaped using the utility model, reduces small size sun gear machining difficulty, production efficiency is high, and stock utilization is high, and processing cost is low, improves primary transmission gear teeth face intensity.
Description
Technical field
The utility model is related to a kind of automatic gearbox sun gear more particularly to small size automatic gearbox too
Sun wheel manufacture extrusion die.
Background technology
Sun gear is that auto gearbox is used for speed-change and gearshift, transmits the important part of varying load, generally comprises hollow
Shaft body, the outer surface of the hollow shaft body are equipped with primary transmission gear 1 and secondary transmission gear 2, the primary transmission tooth
Annular groove 3 is equipped between wheel 1 and secondary transmission gear 2, the primary transmission gear 1 and secondary transmission gear 2 are helical gear.
Sun gear is since size is small thus increases difficulty to helical tooth flank machining, the root diameter of some primary transmission gears
Only 20mm.Existing manufacturing process one is that bar is selected directly to be produced using cutting technology, this technique shortcoming is to cut
It is low to cut processing efficiency, is suitable only for single-piece or small lot production application；Second is that then hot forging is carried out in machining forming again
Gear on wall, two kinds of production technologies are all using the method formed gear of traditional machining, are produced suitable for small lot, equipment
Fund input is big, and low production efficiency, stock utilization is low, and the production cycle is long, high processing costs；Secondly, in cutting process
Metal streamline is cut off, and flank of tooth compactness is bad, bad mechanical property, it is difficult to meet auto parts and components matching quality requirement.Country
Department of Intellectual Property discloses a kind of automatic gearbox of vehicles sun gear hot-die Forging Technology（CN201510699523.4）, including
Following steps：Base will be heated to 1000-1100 DEG C for manufacturing the steel alloy of sun gear, be then placed in hotdie forging press
In forged, obtain the sun gear blank；Spheroidizing takes sun gear blank obtained by step 1) from hotdie forging press
Go out, be cooled to 800-850 DEG C with the speed of 5 DEG C/min, carry out spheroidizing processing, after keeping the temperature 2-3h, be cooled to room temperature；It oozes
Blank is put into carburizer by carbon, and 900-950 DEG C is heated in carburizer, is taken out, is cooled to room temperature after keeping the temperature 10-15h；
Blank after Carburization Treatment is carried out quenching treatment by quenching, tempering, and hardening heat is 800-850 DEG C, after keeping the temperature 1-2h, with 10
DEG C/speed of min is cooled to room temperature, then carry out temper, 500-550 DEG C of temperature, after keeping the temperature 2-4h, with 10 DEG C/min
Speed be cooled to room temperature；Endoporus is refined, endoporus, diameter of bore 15mm, diameter of bore fine grinding error 0.01- are refined using grinding wheel
0.02mm, grinding wheel diameter 10-15mm, 7500 turns/min of grinding wheel speed, surfaces externally and internally concentricity≤0.15mm；Counterbore is ground, with
It on the basis of grinding endoporus, processed on counter bore bit grinder, grind counterbore；Face grinding, grinds off black skin on surface grinding machine, and two
Faces parallel error is less than 0.002mm；Fine cylindrical on the basis of endoporus, refines blank outer circle, outer circle is straight in centerless grinding machine
Diameter is refined to 30mm, error -0.1-0.1mm；Gear honing carries out gear honing processing, gear honing speed 1-3m/s, more than gear honing on gear honing machine
Amount≤0.025mm, top gem of a girdle-pendant wheel speed 1000-1100 turn/min, length feed amount 0.05-0.065mm/r；Polishing applies antirust oil, send
Enter gear burnishing machine polishing, coat antirust oil, it is dry, obtain the sun gear.In short, existing manufacturing process：1. machine tool is thrown
Enter big；2. cutter loss is big；3. especially because primary transmission gear size is small thus helical tooth flank machining difficulty is big, production
Efficiency is low；It is 4. of high cost；5. base material is directly processed, metal streamline is cut off, and teeth portion intensity is low, of poor quality；6. waste metal material
Material.
Invention content
The utility model is mainly for small size automatic gearbox sun gear using traditional machining forming technique
Deficiency, a kind of cold forging Extruding die is provided, using the cold forging Extruding die extrusion molding sun gear primary transmission gear, is reduced
Machining difficulty and machining amount is reduced, equipment funds input is little, and production efficiency is high, with short production cycle, material profit
With rate height, raw material are saved, processing cost is low, and metal streamline is not cut off, and grain structure is fine and close, improves primary transmission gear
Gear Surface Strength, mechanical performance high quality is good, disclosure satisfy that the mating requirement of auto parts and components.
The utility model is achieved by the following technical solution：
A kind of cold forging Extruding die including upper male mould, upper mold positioning sleeve, nitrogen gas spring, movable upper cavity die, lower cavity die, is held
Briquetting, ejector beam, fixed guide circle, top mold frame, mould bases guide sleeve and guide post, upper mold positioning are set on upper male mould upper end surrounding,
Upper mold positioning is set in fixed guide circle and can be moved up and down under external force along fixed guide circle inner wall, nitrogen gas spring
It is arranged between upper mold positioning sleeve and movable upper cavity die；The axially extending bore circle of movable upper cavity die and lower cavity die for two coaxial cooperations
Set, movable upper cavity die are connect with fixed guide circle, and fixed guide circle is fixed in top mold frame, and top mold frame is connect with mould bases guide sleeve,
Mould bases guide sleeve is sleeved on guide post and can be moved up and down under external force along guide post；The mould intracavity wall of lower cavity die is equipped with and one
The screw serrated form that grade transmission gear matches, pressure block are located at the bottom of lower cavity die, and ejector beam is extended vertically through under pressure block entrance
Cavity plate die cavity.
During using the utility model cold forging extrusion molding, movable upper cavity die and lower cavity die molding, upper male mould downlink, upper mold are fixed
Position set moves down nitrogen gas spring compression along fixed guide circle inner wall；As nitrogen gas spring relaxes after the completion of cold forging extruding, in drive
Mould positioning sleeve is resetted along fixed guide circle inner wall, upper male mould uplink, while mould bases guide sleeve is under external force along guide post to moving up
Dynamic, the fixed guide circle for making top mold frame and being attached thereto moves up, so as to drive activity upper cavity die move up and with it is recessed
Mould detaches, and is conducive to exercise press forging depanning on ejector beam
The utility model has the advantages that compared with prior art:
1. using the utility model cold forging extrusion molding sun gear primary transmission gear, mold arrangement is in single-station forcing press
On, it is smaller to mating press tonnage requirement, so as to greatly reduce the investment of corollary equipment；
2. use the utility model cold forging extrusion molding sun gear primary transmission gear, be all on forcing press moment it is complete
It is squeezed into forging, thus helical tooth flank machining difficulty big this problem small for primary transmission gear size reduces machining
Difficulty reduces traditional machining amount, improves stock utilization, production efficiency is high, reduces production cost；
All it is the primary property on forcing press 3. using the utility model cold forging extrusion molding sun gear primary transmission gear
Forging is extruded into shape, and product accuracy is high, extrusion forming metal streamline is not cut off, and grain structure is fine and close, improves Gear Surface Strength, produces
Product mechanical performance high quality is good.
Description of the drawings
Fig. 1 is the structure diagram of automatic gearbox sun gear in the utility model embodiment；
Fig. 2 is the utility model embodiment blank deformation process flow chart；
Fig. 3 is the structure diagram of the utility model cold forging Extruding die.
Serial number in figure：1st, primary transmission gear, 2, secondary transmission gear, 3, annular groove, 4, upper male mould, 5, upper mold positioning
Set, 6, nitrogen gas spring, 7, movable upper cavity die, 8, lower cavity die, 9, pressure block, 10, ejector beam, 11, fixed guide circle, 12, upper mold
Frame, 13, mould bases guide sleeve, 14, guide post.
Specific embodiment
The technical solutions of the present invention will be further described by way of example and in conjunction with the accompanying drawings.
Embodiment：It is shown in Figure 1, a kind of automatic gearbox sun gear, including hollow shaft body, the hollow shaft
The outer surface of ontology is equipped with primary transmission gear 1 and secondary transmission gear 2, the primary transmission gear 1 and secondary transmission gear 2
Between be equipped with annular groove 3, the primary transmission gear 1 and secondary transmission gear 2 are helical gear.
Referring to shown in Fig. 2 and Fig. 3, which includes the following steps：1. blanking：Choosing
Diameter of rod is selected, the bar length as needed for drawing size cut；2. spheroidizing：Bar is fitted into stove be heated to 720 DEG C-
780 DEG C of progress spheroidizings, Oxygen potential >=90%, hardness≤80HRC；3. base：Peeling scale removal and chamfering；4. ball blast：
Blank after base is sent into shot-blasting machine and makees blasting treatment, increases surface Ra values；5. it lubricates：Table is carried out after blank blasting treatment
Face lubricated；6. cold forging extrusion molding：Blank after lubricated is put into cold forging Extruding die, cold forging extrusion molding one
Grade transmission gear 1；Cold forging Extruding die includes upper male mould 4, upper mold positioning sleeve 5, nitrogen gas spring 6, movable upper cavity die 7, lower cavity die
8th, pressure block 9, ejector beam 10, fixed guide circle 11, top mold frame 12, mould bases guide sleeve 13 and guide post 14, upper mold positioning sleeve 7 are arranged on
6 upper end surrounding of upper male mould, upper mold positioning sleeve 7 are arranged in fixed guide circle 11 and can be under external force along fixed guide circles 11
Inner wall moves up and down, and nitrogen gas spring 6 is arranged between upper mold positioning sleeve 5 and movable upper cavity die 7；Movable upper cavity die 7 and lower cavity die 8
Axially extending bore for two coaxial cooperations justifies set, and movable upper cavity die 7 is connect with fixed guide circle 11, and fixed guide circle 11 is fixed on
In top mold frame 12, top mold frame 12 is connect with mould bases guide sleeve 13, and mould bases guide sleeve 13 is sleeved on guide post 14 and can be under external force
It is moved up and down along guide post 14；The mould intracavity wall of lower cavity die 8 is equipped with the screw serrated form to match with primary transmission gear 1, pressure-bearing
Block 9 is located at the bottom of lower cavity die 8, and ejector beam 10 extends vertically through pressure block 9 and enters 8 die cavity of lower cavity die；7. jumping-up：Cold forging is squeezed
Blank after forming is put into jumping-up cavity plate, the solid shaft part corresponding to upsetting formation secondary transmission gear 2；8. machining：
Machining is carried out to the blank after jumping-up, processing forms secondary transmission gear 2, annular groove 3 and hollow shaft；9. it is heat-treated.
This big problem of thus helical tooth flank machining difficulty small for primary transmission gear size, using this practicality newly
Type cold forging extrusion molding sun gear primary transmission gear, overcomes small size automatic gearbox sun gear machining and is stranded
Difficulty reduces equipment investment, improves production efficiency and saves raw material, reduces production cost；While product accuracy height,
Extrusion forming metal streamline is not cut off, and grain structure is fine and close, improves Gear Surface Strength, product mechanical performance high quality is good.
Embodiment is not formed and protects model to the utility model only to facilitate understand the technical solution of the utility model
The limitation enclosed, it is every without departing from technical solutions of the utility model perhaps according to the technical essence of the utility model to top
Any simple modification, equivalent change and modification that case is made, still falls within scope of protection of the utility model.
Claims (1)
1. a kind of cold forging Extruding die, it is characterised in that:Including upper male mould (4), upper mold positioning sleeve (5), nitrogen gas spring (6), activity
Upper cavity die (7), lower cavity die (8), pressure block (9), ejector beam (10), fixed guide circle (11), top mold frame (12), mould bases guide sleeve (13) with guide post (14),
(7) upper mold positioning sleeve is arranged on upper male mould (6) upper end surrounding, (7) upper mold positioning sleeve is arranged in fixed guide circle and can be in outer masterpiece
Moved up and down with lower along fixed guide circle inner wall, nitrogen gas spring be (6) arranged on upper mold positioning sleeve (5) and movable upper cavity die (7) between；
(7) (8) movable upper cavity die justifies set with lower cavity die for the axially extending bore of two coaxial cooperations, movable upper cavity die (7) with fixed guide circle (11)
Connection, fixed guide circle be (11) fixed on top mold frame (12) on, (12) (13) top mold frame is connect with mould bases guide sleeve, (13) mould bases guide sleeve is sleeved on
Guide post is (14) upper and can (14) be moved up and down along guide post under external force；The mould intracavity wall of lower cavity die (8) is equipped with and primary transmission tooth
The screw serrated form (1) to match is taken turns, (9) pressure block is located at the bottom of lower cavity die (8), (10) ejector beam extends vertically through pressure block and (9) enters
Lower cavity die (8) die cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721761237.7U CN207547509U (en) | 2017-12-17 | 2017-12-17 | A kind of cold forging Extruding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721761237.7U CN207547509U (en) | 2017-12-17 | 2017-12-17 | A kind of cold forging Extruding die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207547509U true CN207547509U (en) | 2018-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721761237.7U Active CN207547509U (en) | 2017-12-17 | 2017-12-17 | A kind of cold forging Extruding die |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931503A (en) * | 2017-12-17 | 2018-04-20 | 江苏威鹰机械有限公司 | A kind of cold forging Extruding die |
| CN115570340A (en) * | 2022-09-23 | 2023-01-06 | 重庆旺德福机械有限公司 | Cold extrusion processing technology for bevel wheel |
-
2017
- 2017-12-17 CN CN201721761237.7U patent/CN207547509U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931503A (en) * | 2017-12-17 | 2018-04-20 | 江苏威鹰机械有限公司 | A kind of cold forging Extruding die |
| CN115570340A (en) * | 2022-09-23 | 2023-01-06 | 重庆旺德福机械有限公司 | Cold extrusion processing technology for bevel wheel |
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