CN1035975A - The manufacture method of bicycle freewheel - Google Patents
The manufacture method of bicycle freewheel Download PDFInfo
- Publication number
- CN1035975A CN1035975A CN 88101437 CN88101437A CN1035975A CN 1035975 A CN1035975 A CN 1035975A CN 88101437 CN88101437 CN 88101437 CN 88101437 A CN88101437 A CN 88101437A CN 1035975 A CN1035975 A CN 1035975A
- Authority
- CN
- China
- Prior art keywords
- blank
- ring
- inner core
- forging
- outer ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 238000005242 forging Methods 0.000 claims description 11
- 230000010354 integration Effects 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 4
- 238000009721 upset forging Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 3
- 238000010273 cold forging Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Forging (AREA)
Abstract
The outer ring of bicycle freewheel, inner core, the manufacture method that back-up ring is general are to make outer ring and inner core by forge hot or cold forging respectively, become back-up ring by sheet-metal press working again, stock utilization and productivity ratio are low, the cost height.The present invention utilizes a bar stuff blank to upset towards the outer ring, inner core, the back-up ring that wait less, no Cutting Process is made flywheel by uniting, and the stock utilization height is saved the energy, reduces cost, and improve working conditions, and used press tonnage is less.
Description
The invention belongs to the manufacture method of bicycle freewheel.
Bicycle freewheel is made up of outer ring (1), inner core (2), two back-up rings (3) and ratchet pawl, steel ball etc. as shown in Figure 1.Outer ring and inner core adopt forge hot and cold forging method to make at present, and back-up ring is made with sheet-metal press working.Stock utilization and productivity ratio are all very low, the product cost height.
The objective of the invention is with efficiently less, no NEW CUTTING TECHNOLOGY makes bicycle freewheel, improves stock utilization.
Design of the present invention is through plastic working with outer ring, inner core and two back-up rings that operation is made bicycle freewheel such as cut with blank.
Concrete technological process of the present invention such as Fig. 2, blank process heating, jumping-up and punching process integration by the bar cutting-out, wash away gross weight, make first intermediate blank through positive and negative combination of extrusion technology again and again first intermediate blank is die-cut into three, first is pressed into the outer ring, and second is pressed into back-up ring, the 3rd process upsetting squeeze process integration made second intermediate blank, again second intermediate blank is die-cut into two, wherein first is pressed into a back-up ring, and another part is made inner core through the upsetting squeeze process integration.
Be the outer ring of realizing that the present invention makes bicycle freewheel with a bar blank, inner core and two back-up rings, blank must be made the middle blank of given shape with special Forging Technology, for the Forging Technology of finishing above-mentioned requirements must be with upset forging and impact forging combined technology and specific mould, the present invention utilizes the mould of Chinese patent 85100078 patents and technology to make the first middle blank, its mould structure such as Fig. 6, this mould are jumping-up and the special use of punching process integration, press finished piece(s) to take out from the die upper end.Mould structure removes general upper and lower backing plate (15,16), outside upper and lower drift (17,18) and the relevant connecting piece, a combined die that can fluctuate in the course of the work (19) is arranged, this die is press-fitted composition by an outer ring (20) and two inner rings (21,22).During the work beginning, blank is put into combined die (19), plays the guide-localization effect.Upper punch (17) is behind down stroke contact blank, and pressing plate (26) promotes combined die (19) and descends, and the control metal deformation plays the die effect.During the upper punch backhaul, combined die is pushed back by guide pillar spring (23), and ejector beam (25) is released workpiece (24).Carry out second work piece production then.
Advantage of the present invention is the economical with materials and the energy, and the productivity ratio height can reduce product cost, improve working conditions, and used press tonnage is less.
Description of drawings is as follows:
Fig. 1 is bicycle freewheel part figure in addition
1-outer ring 2-inner core 3-back-up ring
Fig. 2 is a flow chart
Fig. 3 is other part process figure
The shape 7-in addition part shape 6-wash away gross weight after of 4-bar blank 5-after upset dashing connection technology is through just, part shape in addition behind the anti-crowded process integration, the 3rd 11-8 that blank cuts in the middle of second 10-first that blank cuts in the middle of first 9-first that blank cuts in the middle of the blank 8-first in the middle of first be through the shape of the shape 12-10 behind the preform after through the upsetting squeeze process integration, blank second through cutting in the middle of first 14-second of blank through cutting in the middle of the blank 13-second in the middle of second
Fig. 4 is that the first middle blank is cut schematic diagram
Fig. 5 is that the second middle blank is cut schematic diagram
Fig. 6 is upset forging and impact forging combined process mould schematic diagram
15, the upper and lower backing plate 17 of 16-, the upper and lower drift of 18-
19-combined die 20-combined die outer ring
21,22-combined die inner ring 23-guide pillar spring
24-workpiece 25-ejector beam 26-pressing plate
Embodiments of the invention are as follows:
The upset forging and impact forging combined technological forming of bar blank (4) process is as (5), wash away the blank that gross weight becomes (6) shape again, blank (6) is the first middle blank (7) through positive and negative crowded process integration postforming, this blank cuts into three (8 by die-cut shown in Fig. 4 dotted line, 9,10), first (8) make the part in addition of (11) shape through preform, finish-forging is made outer ring (1) second (9) and is made back-up ring (3) through excellent suitability for press forming again, the 3rd (10) are blank (12) in the middle of the upsetting squeeze process integration makes second, this blank cuts into two (13 by dotted line shown in Figure 5 is die-cut, 14), first (13) are back-up ring (3) through forging forming, and second (14) are configured as inner core (2) through the upsetting squeeze process integration.
Claims (2)
1, a kind of manufacture method of bicycle freewheel is characterized in that by blank through plastic working with outer ring, inner core and two back-up rings that operation is made bicycle freewheel such as cut.
2, bicycle freewheel manufacture method as claimed in claim 1, it is characterized in that bar stuff blank is through upset forging and impact forging combined process forming, wash away gross weight, make the first middle blank through positive and negative crowded process integration again, blank is through cutting into three in the middle of first, first behind preform finish-forging become the outer ring, second becomes back-up ring after forging and pressing, the 3rd blank in the middle of the upsetting squeeze process integration makes second, blank is through cutting into two in the middle of second, make back-up ring through forging and pressing for first, second is inner core through upsetting extrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88101437 CN1011297B (en) | 1988-03-24 | 1988-03-24 | Manufacturing method of bicycle flywheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88101437 CN1011297B (en) | 1988-03-24 | 1988-03-24 | Manufacturing method of bicycle flywheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1035975A true CN1035975A (en) | 1989-10-04 |
| CN1011297B CN1011297B (en) | 1991-01-23 |
Family
ID=4831749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88101437 Expired CN1011297B (en) | 1988-03-24 | 1988-03-24 | Manufacturing method of bicycle flywheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1011297B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037826C (en) * | 1992-10-19 | 1998-03-25 | 江兴锻压工业股份有限公司 | Method for mfg. (BJ) inner wheel of automobile transmission shaft with equi-speed joint |
| CN103920735A (en) * | 2014-04-22 | 2014-07-16 | 靖江三鹏汽车模具制造有限公司 | Primary flywheel extrusion die of flywheel vibration reduction system |
| CN104339126A (en) * | 2013-08-07 | 2015-02-11 | 超捷紧固系统(上海)股份有限公司 | Manufacturing method of wear-resistant flat pull adapter |
| CN104439995A (en) * | 2014-12-05 | 2015-03-25 | 江苏威鹰机械有限公司 | Making technology for transmission double-end internal-teeth ring of electric forklift |
| CN105339108A (en) * | 2013-05-31 | 2016-02-17 | 高周波热錬株式会社 | Method of manufacturing metal core for resin gear |
-
1988
- 1988-03-24 CN CN 88101437 patent/CN1011297B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037826C (en) * | 1992-10-19 | 1998-03-25 | 江兴锻压工业股份有限公司 | Method for mfg. (BJ) inner wheel of automobile transmission shaft with equi-speed joint |
| CN105339108A (en) * | 2013-05-31 | 2016-02-17 | 高周波热錬株式会社 | Method of manufacturing metal core for resin gear |
| CN104339126A (en) * | 2013-08-07 | 2015-02-11 | 超捷紧固系统(上海)股份有限公司 | Manufacturing method of wear-resistant flat pull adapter |
| CN103920735A (en) * | 2014-04-22 | 2014-07-16 | 靖江三鹏汽车模具制造有限公司 | Primary flywheel extrusion die of flywheel vibration reduction system |
| CN104439995A (en) * | 2014-12-05 | 2015-03-25 | 江苏威鹰机械有限公司 | Making technology for transmission double-end internal-teeth ring of electric forklift |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1011297B (en) | 1991-01-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |