CN202570977U - Fractal spinning mould - Google Patents
Fractal spinning mould Download PDFInfo
- Publication number
- CN202570977U CN202570977U CN 201220171359 CN201220171359U CN202570977U CN 202570977 U CN202570977 U CN 202570977U CN 201220171359 CN201220171359 CN 201220171359 CN 201220171359 U CN201220171359 U CN 201220171359U CN 202570977 U CN202570977 U CN 202570977U
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Abstract
The utility model discloses a fractal spinning mould. The fractal spinning mould comprises a driving mandrel and a driven mandrel. Cross keys or a pair of flat keys are formed on the surfaces where the driving mandrel and the driven mandrel are matched with a blank. When the fractal spinning mould is used, the cross keys or the pair of flat keys on the surfaces of the drive mandrel and the driven mandrel are respectively inserted into keyways at two surface where the blank is matched with the small end surfaces of the driving mandrel and the driven mandrel, so that the torque which is applied on the drive mandrel through a spindle of a machine tool is transferred to a workpiece through the cross key or the flat keys of the driving mandrel, the workpiece and the driven mandrel are rotated along with the spindle through the coordination of the workpiece and the cross key or the flat keys of the driven mandrel, and thus, the driving mandrel, the workpiece and the driven mandrel synchronously rotate with the spindle for preventing the workpiece from sliding relative to the mandrels; and because the cross keys or the flat keys on the driving mandrel and the driven mandrel are respectively inserted into the keyways which are distributed in the blank, the blank is located, and the eccentricity is prevented.
Description
Technical field
The present invention relates to the mould pressing manufacture field, specifically is a kind of fractal spinning mould.
Background technology
Fractal spinning is the advanced technologies method of shaping solid wheel, wheel hub and monoblock type V-shaped groove belt pulley.In present fractal spinning process; Initiatively the big end of core connects through mechanical system with machine tool chief axis; The big end of driven core also connects through mechanical system with the tail top; Tail top center line overlaps with spindle centerline, and a surface of blank cooperates with active core small end face, and another surface of blank cooperates with driven core small end face.During mould pressing, only impose on the frictional force of workpiece and the frictional force that workpiece imposes on driven core, realize that initiatively core, workpiece and driven core are with the rotation of main shaft through the active core.Carrying out along with fractal spinning process; The radial feed degree of depth of spinning roller constantly increases, and it is constant basically to apply the pressure that acts on active core and driven core through lathe tail top and main shaft, thereby the frictional force between active core and driven core and workpiece is also constant basically; And the suffered spinning roller power of workpiece constantly increases; The resistance that workpiece rotates also constantly increases, and therefore causes frictional force to be difficult to continue to drive workpiece and rotates synchronously with main shaft with driven core, and workpiece is produced slide and off-centre; Even stuck can not the rotation, thereby influence normally carrying out of rotary pressing processing process.
Up to now, less for fractal mould pressing Study on Technology.That reports has only the part foreign scholar on the 3 D deformation bases of two-dimensional plane distortion and a large amount of simplification; Problem in the fractal mould pressing processes such as fractal mould pressing mechanism, fractal spinning force ability calculation of parameter and material flowing law has been carried out a small amount of research; The failure mode of main research is cracking and flange unstability, slides and the proposition and the problem-solving approach of eccentric phenomena do not appear in the newspapers as yet for fractal spinning workpiece.
Summary of the invention
The frictional force that exists in the prior art is difficult to continue to drive workpiece and driven core rotates with main shaft synchronously in order to overcome; And make workpiece produce slip and eccentric; Even stuck can not the rotation, thereby influence the deficiency of normally carrying out of rotary pressing processing process, the present invention proposes a kind of fractal spinning mould.
The present invention includes initiatively core and driven core.Said active core and driven core are revolving body, and its longitudinal section is trapezoidal.The small end face of said active core and driven core small end face respectively with a surface engagement of blank.The small end face that small end face that cooperates with blank at the active core and driven core cooperate with blank all has key, and described key is cross key or a pair of flat key.When said key was the cross key, the geometric center of this cross key overlapped with the geometric center of place end face.When said key was a pair of flat key, this a pair of flat key was positioned at the middle part of place end face and is symmetrical in this active core small end face center; 90 ° interlock between a pair of flat key that said small end face at the active core is symmetrically distributed and a pair of flat key that is symmetrically distributed at driven core small end face.
Have at the large end face center of active core with machine tool chief axis connects firmly and be connected inserted link.
During use, initiatively in cross key on cross key on the core or flat key and the driven core or the flat key two sides of inserting blank respectively and the keyway that active core and driven core end face cooperate; The keyway geometric center overlaps with the workpiece geometric center.
In the present invention; Machine tool chief axis imposes on initiatively, and the torque of core passes to workpiece through the key on the active core; The key that cooperates through workpiece and driven core is again realized the rotation with main shaft of workpiece and driven core; Core, workpiece and driven core rotate with main shaft synchronously thereby make initiatively, prevent that the relative core of workpiece from sliding; Because initiatively the key on core and the driven core inserts in the keyway that distributes on the blank, can play positioning action to blank, prevents off-centre.Therefore, can prevent that through the present invention fractal spinning workpiece from sliding and off-centre, the rotary pressing processing process is carried out smoothly.
Description of drawings
Fig. 1 is the fractal spinning sketch map that active core, blank and the driven core of cross key are arranged, and wherein Fig. 1 a is a front view, and Fig. 1 b is that the A of Fig. 1 a is to view;
Fig. 2 is the fractal spinning sketch map that active core, blank and the driven core of flat key are arranged, and wherein Fig. 2 a is a front view, and Fig. 2 b is that the A of Fig. 2 a is to view; Wherein:
1. core 2. blanks 3. driven core 4. keys initiatively
The specific embodiment
Embodiment one
Present embodiment is a kind of fractal spinning mould that the cross key is arranged that is used for the fractal spinning of monoblock type wheel hub.The fractal spinning mould of the said wheel hub attachment face diameter that is used to be shaped is the wheel hub of 120mm.It is blank material that present embodiment adopts circular LF21M aluminium alloy, and this blank diameter is 200mm, blank thickness t
0=10mm; Because formed thereby wheel hub attachment face diameter is 120mm, so the diameter d of active core and driven core small end face is 120mm.
Present embodiment comprises initiatively core 1 and driven core 3.Said active core 1 is down trapezoidal revolving body for the longitudinal section, and the circumferential surface of this active core 1 is the forming face of wheel hub.Have at the large end face center of said active core 1 with machine tool chief axis connects firmly and be connected inserted link; There is key 4 at small end face center at active core 1; In the present embodiment, initiatively the key at the center of core 1 is the cross key, and this cross key geometric center overlaps with this small end face geometric center.
Driven core is that the longitudinal section just is being trapezoidal revolving body, and the circumferential surface of this driven core 3 is the forming face of wheel hub; There is key 4 at small end face center at driven core 3, and in the present embodiment, the key at the small end face center of driven core 3 is the cross key.During use, the connection inserted link through active core center initiatively core connects firmly with machine tool chief axis, and driven core 3 is positioned at the below of active core 1.Blank 2 and is processed with the cross keyway that cooperates with core 1 initiatively and cross key on the driven core 3 respectively at the upper surface of this blank and lower surface between active core 1 and driven core 3.Cross key on the active core and the cross key on the driven core are inserted respectively in the cross keyway that distributes on the blank 2.Tail on the lathe withstands on driven core 3 large end face centers, and driven core 3 and blank 2 and active core 1 are tightened up.
Embodiment two
Present embodiment is a kind of fractal spinning mould that flat key is arranged that is used for the fractal spinning of monoblock type wheel hub, and the fractal spinning mould of the said wheel hub attachment face diameter that is used to be shaped is the wheel hub of 120mm.It is blank material that present embodiment adopts circular LF21M aluminium alloy, and this blank diameter is 200mm, blank thickness t
0=10mm; Because formed thereby wheel hub attachment face diameter is 120mm, so the diameter d of active core and driven core small end is 120mm.
Present embodiment comprises initiatively core 1 and driven core 3.Said active core 1 is down trapezoidal revolving body for the longitudinal section, and the circumferential surface of this active core 1 is the forming face of wheel hub.Have at the large end face center of said active core 1 with machine tool chief axis connects firmly to be connected inserted link, at the small end face of active core 1 key 4 is arranged, in the present embodiment, the key 4 of said active core 1 small end face is a pair of flat key.Described a pair of flat key is positioned at the middle part of place end face and is symmetrical in this active core small end face center.Driven core is that the longitudinal section just is being trapezoidal revolving body, and the circumferential surface of this driven core 3 is the forming face of wheel hub; Small end face at driven core 3 has key 4, and in the present embodiment, the key 4 of said driven core 3 small end faces is a pair of flat key.Described a pair of flat key is positioned at the middle part of place end face and is symmetrical in this active core small end face center.90 ° interlock between a pair of flat key that said lower surface at active core 1 is symmetrically distributed and a pair of flat key that is symmetrically distributed at driven core 3 small end faces.
During use, the connection inserted link through active core center initiatively core connects firmly with machine tool chief axis, and driven core 3 is positioned at the initiatively below of core 1, and makes between a pair of flat key of a pair of flat key of active core small end face and driven core upper surface 90 ° to interlock.Blank 2 is between active core 1 and driven core 3, and initiatively the flat key on the core inserts in each keyway of distribution on the blank 2 with the flat key on the driven core.Tail on the lathe withstands on driven core 3 large end face centers, and driven core 3 and blank and active core 1 are tightened up.
Claims (1)
1. a fractal spinning mould comprises initiatively core and driven core; Said active core and driven core are the longitudinal section and are down trapezoidal revolving body, and the circumferential surface of this active core and driven core is the forming face of wheel hub; Have at the large end face center of said active core with machine tool chief axis connects firmly and be connected inserted link; It is characterized in that the small end face that small end face that cooperates with blank at the active core and driven core cooperate with blank all has key, described key is cross key or a pair of flat key; When said key was the cross key, the geometric center of this cross key overlapped with the geometric center of place end face; When said key was a pair of flat key, this a pair of flat key was positioned at the middle part of place end face and is symmetrical in this active core small end face center; 90 ° interlock between a pair of flat key that said small end face at the active core is symmetrically distributed and a pair of flat key that is symmetrically distributed at driven core small end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220171359 CN202570977U (en) | 2012-04-21 | 2012-04-21 | Fractal spinning mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220171359 CN202570977U (en) | 2012-04-21 | 2012-04-21 | Fractal spinning mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202570977U true CN202570977U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220171359 Expired - Lifetime CN202570977U (en) | 2012-04-21 | 2012-04-21 | Fractal spinning mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202570977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102632137A (en) * | 2012-04-21 | 2012-08-15 | 西北工业大学 | Fractal spinning mold with crossed key and method for determining crossed key |
-
2012
- 2012-04-21 CN CN 201220171359 patent/CN202570977U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102632137A (en) * | 2012-04-21 | 2012-08-15 | 西北工业大学 | Fractal spinning mold with crossed key and method for determining crossed key |
| CN102632137B (en) * | 2012-04-21 | 2014-08-20 | 西北工业大学 | Fractal spinning mold with crossed key and method for determining crossed key |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |