CN202571009U

CN202571009U - Fractal spinning mold with locking tables

Info

Publication number: CN202571009U
Application number: CN 201220171437
Authority: CN
Inventors: 詹梅; 王巧玲; 郭靖; 杨合
Original assignee: Northwestern Polytechnical University
Current assignee: Northwestern Polytechnical University
Priority date: 2012-04-21
Filing date: 2012-04-21
Publication date: 2012-12-05
Anticipated expiration: 2022-04-21

Abstract

The utility model relates to a fractal spinning mold with locking tables. The fractal spinning mold comprises a drive core mold and a driven core mold. The locking tables are respectively arranged in centers of small end faces where the drive core mold and the driven core mold are respectively matched with a blank. When in use, the locking table on the drive core mold and the locking table on the driven core mold are respectively inserted into strip-type slots on two sides of the blank, which are matched with the locking tables on the small end faces of the drive core mold and the driven core mold, so that torque applied to the drive core mold by a machine tool spindle is transmitted to a workpiece through the locking table on the drive core mold, and the rotation of the workpiece and the driven core mold along a main shaft is realized through a locking table of the workpiece, which is matched with the driven core mold, so that the drive core mold, the workpiece and the driven core mold are synchronously rotated along the main shaft, the workpiece is prevented from sliding in a manner relative to the core molds, and the blank is positioned.

Description

A kind of fractal spinning mould that the stop platform is arranged

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 that the stop platform is arranged.

The present invention includes initiatively core and driven core.The small end face of said active core and the small end face of driven core respectively with a surface engagement of blank.There is the stop platform at the small end face center that cooperates with blank at the active core, and the geometric center of this stop platform overlaps with the geometric center of this active core end face; The small end face that cooperates with blank at driven core also has the stop platform, and the geometric center of this stop platform overlaps with the geometric center of this driven core end face; Have with machine tool chief axis connects firmly at another centre of surface of active core and to be connected inserted link.During use, initiatively the stop platform on the core and stop platform on the driven core insert respectively in blank two sides and the bar-shaped trough that the stop platform of active core and driven core end face cooperates, and the geometric center of this bar-shaped trough overlaps with the geometric center of blank.

In the present invention; Machine tool chief axis imposes on initiatively, and the torque of core passes to workpiece through the stop platform on the active core; The stop platform 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 stop platform on the core and the stop platform on the driven core are symmetrically distributed, and insert respectively in the bar-shaped trough on the blank, can play positioning action to blank, prevent 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 of core, blank and driven core initiatively, 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 structural representation of active core, and wherein Fig. 2 a is a front view, and Fig. 2 b is the upward view of Fig. 2 a;

Fig. 3 is the structural representation of driven core, and wherein Fig. 3 a is a front view, and Fig. 3 b is a vertical view.Among the figure:

1. core 2. blanks 3. driven core 4. stop platforms initiatively

The specific embodiment

Present embodiment is a kind of mould 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 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 to be connected inserted link, the stop platform 4 of bar shaped is arranged at the small end face center of active core 1.Driven core 3 just is being trapezoidal revolving body for the longitudinal section, and the circumferential surface of this driven core 3 is the forming face of wheel hub; The stop platform that bar shaped is also arranged at the small end face center of driven core 3.During use, the connection inserted link through active core center initiatively core is connected 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 bar-shaped trough that cooperates with core 1 initiatively and stop platform 4 on the driven core 3 respectively at the upper surface of this blank and lower surface between active core 1 and driven core 3.Stop platform on stop platform on the active core 4 and the driven core is inserted respectively in the bar-shaped trough that distributes on the blank 2.Tail on the lathe withstands on driven core 3 large end face centers driven core 3 and blank 2 and active core 1 is tightened up.

Claims

1. the fractal spinning mould that the stop platform is arranged comprises initiatively core and driven core; The small end face of said active core and the small end face of driven core respectively with a surface engagement of blank; It is characterized in that there is the stop platform at the small end face center that cooperates with blank at the active core, the geometric center of this stop platform overlaps with the geometric center of this active core end face; The small end face that cooperates with blank at driven core also has the stop platform, and the geometric center of this stop platform overlaps with the geometric center of this driven core end face; Have at the large end face center of active core with machine tool chief axis connects firmly and be connected inserted link.