CN2373205Y - Tool for extrusion bolt head low fillet - Google Patents
Tool for extrusion bolt head low fillet Download PDFInfo
- Publication number
- CN2373205Y CN2373205Y CN 97237629 CN97237629U CN2373205Y CN 2373205 Y CN2373205 Y CN 2373205Y CN 97237629 CN97237629 CN 97237629 CN 97237629 U CN97237629 U CN 97237629U CN 2373205 Y CN2373205 Y CN 2373205Y
- Authority
- CN
- China
- Prior art keywords
- chuck
- roller
- ear seat
- fork ear
- pawl
- 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.)
- Expired - Fee Related
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The utility model relates to a cold extrusion tool for lower fillets of bolt heads. The cold extrusion tool for lower fillets of bolt heads is composed of a roller (1) used for extruding parts, a roller shaft (2), a roller fork ear seat (3), a chuck reverse claw (4) and a chuck (5). The utility model is characterized in that the roller fork ear seat can be placed on the chuck reverse claw (4) movably; the angle and the position of the roller fork ear seat can be adjusted by a chuck (5). The chuck (5) is a chuck of a universal machine tool, and the chuck reverse claw (4) is arranged on the chuck (5) reversely. When extruded parts rotate, and down pressure is exerted on the extruded parts, the three rollers rotate following the extruded parts to generate a rolling strengthened force. The fatigue lives of a circular arc of a set-head rotating angle of the fastenings after the strengthening can be improved to satisfy requirements of different industries, such as aviation, spaceflight, etc.
Description
The utility model relates to a kind of specific purpose tool of bolt under head fillet extruding.
In modern mechanical connected, threaded fastener was indispensable traditional standard spare, but with technical development, frame for movement has had higher intensity and life requirements to securing member, and the regular screw threads securing member can not satisfy above-mentioned requirements.Therefore, must strengthen at each position of double thread connector, to improve its fatigue life.Threaded connector heading root corner is one of life-span weak spot, and for strengthening this place, effective measures are it to be carried out once cold extrusion press.The purpose of this utility model realizes that exactly securing member heading fillet is carried out cold extrusion to be strengthened.
For achieving the above object, the utility model has adopted the design shown in figure one, scroll chuck (5) is the universal chuck on the lathe, on have an end of three groups of anti-pawls of chuck (4) roller fork ear seat (3) to be placed in movably on the anti-pawl of chuck (4), it is characterized in that: fork ear seat (3) lower end is an acute angle, makes it to carry out the adjusting of certain limit in the right angle face of the anti-pawl of chuck (4).There is spacing side wall fork ear seat (3) both sides shown in figure two, fork ear seat is stuck on the anti-pawl of chuck (4) neatly, guarantee the central axis of fork ear seat (3) central plane by scroll chuck (5), the other end of fork ear seat (3) has a fork ear, one roller shaft (2) is housed, roller (1) in order to the extruding workpiece is housed on the roller shaft (2), the sagittal plane of the sagittal plane of roller (1) and scroll chuck (5) forms α ° of angle, after roller (1) withstood workpiece, its α angle can radially be adjusted on scroll chuck (5) and changes with the anti-pawl of chuck (4).Roller (1), roller bearing (2), fork ear seat (3) totally three groups are placed in respectively on three anti-pawls (4), utilize the self-centering function of scroll chuck (5) and characteristics easy to adjust, can adapt to different-diameter, the reinforcement requirement of different heading shapes and roll extrusion position.
Embodiment one of the present utility model, shown in figure one, hexagon-headed bolt is carried out cold extrusion to be strengthened, between bolt head and the shank of bolt 90 ° of right angles, at this moment each roller extrusion axis and the surperficial angle α of scroll chuck (5) should be 45 °, if putting on the pressure of ailhead is P1, the extruding force of each roller is F, then has:
F＝P/(3SINα)≈0.47P
At this moment, if wish to change the impression position of roller in the part corner, to satisfy different specification requirements, then can adjust the relative position of the anti-pawl of chuck (4) in scroll chuck (5), the roller shaft line is slightly changed, impression or relatively ailhead or deflection nail bar, this is the key character that this mechanism is different from other mechanism, as long as pressurization and make its rotation just can finish the cold extrusion of workpiece on workpiece.
The utility model embodiment two is extruded workpiece shown in figure three, and the ailhead angle is 100 °, then the angle of bearing-surface and bar is 130 °, and at this moment each roller extrusion axis and the surperficial angle α of scroll chuck (5) are 25 °, at this moment, each roller extruding force is F, then has:
F＝P/(?3SIN25°)?≈0.79P
At this moment, change the relative position of anti-pawl of chuck (4) and scroll chuck (5), then can change the position of workpiece extruding trace, on workpiece, add certain pressure again, and make its rotation, just can finish the workpiece cold extrusion and strengthen.
Claims (4)
1. the utility model relates to a kind of specific purpose tool of bolt under head fillet extruding, and it comprises roller (1), roller shaft (2), roller fork ear seat (3), the anti-pawl of chuck (4), scroll chuck (5) composition that is used to push workpiece.
2. the described roller fork ear seat of claim 1 (3) is a movable part, fork ear by workpiece one end can be installed roller shaft (2), roller shaft (2) is gone up movable suit roller (1), the other end of fork ear seat (3) is one less than 90 ° tip, it is characterized in that pitching ear seat (3) less than on the movable 90 ° of chamfered grooves that are placed in the anti-pawl of chuck (4) in 90 ° tip, there is spacing side wall fork ear seat (3) both sides, and the extruding angle of roller fork ear seat (3) can be adjusted by adjusting the anti-pawl of chuck (4).
3. the described roller of claim 1 (1) is the roller once heat treatment reinforcement, it is characterized in that its roller (1) outer section arc is exactly the required radius of corner of workpiece.
4. anti-pawl of the described chuck of claim 1 (4) and scroll chuck (5) are the used chucks of general lathe, it is characterized in that only utilizing the anti-pawl of chuck (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237629 CN2373205Y (en) | 1997-08-29 | 1997-08-29 | Tool for extrusion bolt head low fillet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237629 CN2373205Y (en) | 1997-08-29 | 1997-08-29 | Tool for extrusion bolt head low fillet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2373205Y true CN2373205Y (en) | 2000-04-12 |
Family
ID=33948231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97237629 Expired - Fee Related CN2373205Y (en) | 1997-08-29 | 1997-08-29 | Tool for extrusion bolt head low fillet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2373205Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214597B (en) * | 2008-01-10 | 2010-10-06 | 陕西飞机工业（集团）有限公司 | Abutting joint bolt root segment R district rolling intensification clamp |
| CN102189141A (en) * | 2011-03-02 | 2011-09-21 | 北京北方车辆集团有限公司 | Method for performing extrusion molding on internal hexagon bolt of alloy steel track end coupling device |
| CN105345475A (en) * | 2015-11-09 | 2016-02-24 | 瑞安市华诺五金制造有限公司 | Technology for machining bolts |
| CN115921760A (en) * | 2023-01-31 | 2023-04-07 | 贵州博泰自动化科技有限公司 | Fastener rolling equipment and rolling method |
-
1997
- 1997-08-29 CN CN 97237629 patent/CN2373205Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214597B (en) * | 2008-01-10 | 2010-10-06 | 陕西飞机工业（集团）有限公司 | Abutting joint bolt root segment R district rolling intensification clamp |
| CN102189141A (en) * | 2011-03-02 | 2011-09-21 | 北京北方车辆集团有限公司 | Method for performing extrusion molding on internal hexagon bolt of alloy steel track end coupling device |
| CN105345475A (en) * | 2015-11-09 | 2016-02-24 | 瑞安市华诺五金制造有限公司 | Technology for machining bolts |
| CN115921760A (en) * | 2023-01-31 | 2023-04-07 | 贵州博泰自动化科技有限公司 | Fastener rolling equipment and rolling method |
| CN115921760B (en) * | 2023-01-31 | 2023-08-18 | 贵州博泰自动化科技有限公司 | Fastener rolling equipment and rolling method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |