CN212822056U

CN212822056U - Strong spinning anti-bulging spinning wheel for cylindrical part

Info

Publication number: CN212822056U
Application number: CN202021748562.1U
Authority: CN
Inventors: 赵刚要; 成一博; 张冉阳; 郭正华; 何龙; 金郴柏
Original assignee: Nanchang Hangkong University
Current assignee: Nanchang Hangkong University
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-03-30
Anticipated expiration: 2030-08-20

Abstract

The utility model discloses a powerful spinning of cylinder prevents uplift and revolves wheel relates to the accurate plastic forming technology field of metal, including revolving the wheel main part, revolve wheel main part middle part and be provided with a mounting hole, revolve and take turns to and prevent the uplift section by having set gradually after to along the axial on the main part outer wall, screw in section and screw out the section, prevent the uplift section, screw in section and screw out the section and be straight section, prevent that the uplift section is gamma with the contained angle of the central axis of revolving the wheel main part, screw in section is alpha with the contained angle of the central axis of revolving the wheel main part, screw out the section and be beta with the contained angle of the central axis of revolving the wheel main part, gamma. The utility model discloses in prevent the uplift section through setting up at screw in section front end, and make gamma be less than alpha for prevent that the uplift section can exert radial stress to the accumulational blank of front end, the uplift phenomenon is effectively contained, and then the uplift volume of greatly reduced cylinder spinning in-process, avoid the production of defects such as fracture, corrugate, skinning, size precision are not enough, simple structure, economical and practical is convenient for use widely.

Description

Strong spinning anti-bulging spinning wheel for cylindrical part

Technical Field

The utility model relates to a metal precision plastic forming technical field especially relates to a powerful spinning anti-hump spinning wheel of section of thick bamboo.

Background

Spinning is a less-cutting advanced machining process which integrates the technological characteristics of forging, extruding, stretching, bending, ring rolling, cross rolling, rolling and the like, and is widely applied to machining and forming of revolving body parts. As shown in fig. 3, according to the plastic characteristics of the material, the blank 7 of the cylindrical part is clamped on the core mould 6 and rotates along with the core mould 6, reasonable spinning process parameters are selected, a spinning tool (spinning wheel or other special-shaped parts) and the core mould 6 are relatively and continuously fed, deformation pressure is sequentially applied to the extremely small part of the workpiece, and the blank 7 of the cylindrical part is pressed and continuously deformed point by point to gradually form the workpiece. In the figure, V is the advancing direction of the spinning roller, and ω is the direction in which the core mold 6 rotates.

The spinning process can be divided into ordinary spinning and power spinning (ironing spinning). The cylinder strong spinning is divided into forward spinning and reverse spinning according to the flow direction of the spinning wheel and the blank, and the operation is abbreviated as follows: normal rotation and reverse rotation. The flow direction of the material in the forward rotation is the same as the movement direction of the rotary wheel; the material flows in the reverse direction to the moving direction of the rotary wheel.

The forming limit of the cylindrical spinning member is a problem of great concern to a large number of spinning workers, and the bulging problem of the cylindrical spinning member is one of important factors affecting the forming limit. The bulge is formed because the blanks at the front end of the contact part of the rotary wheel are easy to accumulate in the strong rotation process. The occurrence of the bulge not only reduces the practical utilization rate of the workpiece material, but also induces the occurrence of cracks, wrinkles, peeling, insufficient dimensional accuracy and other defects.

As shown in fig. 4, the geometric feature of the peripheral end surface of the axial cross section of the conventional spinning roller 8 is only composed of a screwing-in section and a screwing-out section. The screwing angle of the screwing section of the spinning wheel is one of important factors influencing the generation of the bulge, and the bulge quantity can be increased along with the increase of the screwing angle. The screw-in angle of the spinning wheel is generally 20-30 degrees, and the cylindrical part spun by the spinning wheel can well meet other requirements of the cylindrical part, but the bulging phenomenon is often serious.

SUMMERY OF THE UTILITY MODEL

For solving above technical problem, the utility model provides a powerful spinning of section of thick bamboo piece prevents uplift spinning wheel, the uplift volume that can the greatly reduced section of thick bamboo piece spinning in-process, simple structure moreover, economical and practical.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a powerful spinning of cylinder prevents uplift and revolves wheel, including revolving the wheel main part, it is provided with a mounting hole to revolve wheel main part middle part, it prevents uplift section, screw in section and the section of unscrewing to have set gradually by preceding to the back along the axial on the wheel main part outer wall to revolve, prevent the uplift section the screw in section with the section of unscrewing is straight section, prevent the uplift section with the contained angle of the central axis of revolving the wheel main part is gamma, the screw in section with the contained angle of the central axis of revolving the wheel main part is alpha, the section of unscrewing with the contained angle of the central axis of revolving the wheel main part is beta, and gamma is less than alpha.

Preferably, α is 20 to 30 degrees, β is 20 to 30 degrees, γ is 3 to 7 degrees, and α is smaller than β.

Preferably, the radial height between the intersection point of the anti-bulging section and the screwing-in section and the intersection point of the screwing-in section and the screwing-out section is t, and t is equal to the depth of the spinning wheel body pressed into the cylindrical piece in work.

Preferably, a first arc-shaped transition section is arranged between the anti-bulging section and the screwing-in section.

Preferably, a second arc-shaped transition section is arranged between the screwing-in section and the screwing-out section.

The utility model discloses for prior art gain following technological effect:

the utility model provides a powerful spinning of cylinder prevents uplift and revolves wheel, including revolving the wheel main part, revolve wheel main part middle part and be provided with a mounting hole, revolve and take turns the outer wall of main part and prevent the uplift section by having set gradually after to by preceding along the axial, screw in section and the section of unscrewing, prevent the uplift section, the screw in section is straight section with the section of unscrewing, prevent that the uplift section is gamma with the contained angle of the central axis of revolving the wheel main part, the screw in section is alpha with the contained angle of the central axis of revolving the wheel main part, the section of unscrewing is beta with the contained angle of the central axis. The utility model discloses in prevent the uplift section through setting up at screw in section front end, and make gamma be less than alpha for prevent that the uplift section can exert radial stress to the accumulational blank of front end, the uplift phenomenon is effectively contained, and then the uplift volume of greatly reduced cylinder spinning in-process, avoid the production of defects such as fracture, corrugate, skinning, size precision are not enough, moreover the utility model provides a powerful spinning of cylinder is prevented uplift and is revolved wheel simple structure, economical and practical, is convenient for use widely.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a three-dimensional structure of a cylindrical member power spinning anti-bulging spinning wheel provided by the present invention;

FIG. 2 is an axial sectional view of the cylindrical member power spinning anti-bulging spinning wheel provided by the present invention;

FIG. 3 is a schematic diagram of a prior art spinning of a cylindrical member;

fig. 4 is an axial sectional view of a conventional spinning wheel.

Description of reference numerals: 1. a spinning wheel main body; 2. mounting holes; 3. an anti-bulging section; 4. a screwing section; 5. screwing out the section; 6. a core mold; 7. a cylindrical blank; 8. a conventional spinning wheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model aims at providing a powerful spinning of cylinder prevents uplift spinning wheel, the uplift volume that can the greatly reduced cylinder spinning in-process, simple structure moreover, economical and practical.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

As shown in fig. 1 and fig. 2, the embodiment provides a cylindrical member power spinning anti-bulging spinning wheel, which includes a spinning wheel main body 1, a mounting hole 2 is formed in the middle of the spinning wheel main body 1, the spinning wheel main body 1 is fixed on a rotating shaft of a spinning machine through the mounting hole 2, an anti-bulging section 3, a screwing-in section 4 and a screwing-out section 5 are sequentially arranged on the outer wall of the spinning wheel main body 1 from front to back along the axial direction, the anti-bulging section 3, the screwing-in section 4 and the screwing-out section 5 are straight sections, an included angle between the anti-bulging section 3 and the central axis of the spinning wheel main body 1 is γ, an included angle between the screwing-in section 4 and the central axis of the spinning wheel main body 1 is α, an included angle between the screwing-out section 5 and the central axis.

Through preventing uplift section 3 in the setting of 4 front ends in screw in section in this embodiment, and gamma is less than alpha, prevents that the inclination of uplift section 3 is less than the inclination of screw in section 4 promptly for prevent that uplift section 3 can exert radial stress to the accumulational blank of front end, the uplift phenomenon is effectively contained, and then the uplift volume of greatly reduced cylinder spinning in-process, the powerful spinning of cylinder that this embodiment provided prevents uplift revolves wheel simple structure moreover, economical and practical is convenient for use widely.

In the embodiment, α is 20 to 30 degrees, β is 20 to 30 degrees, γ is 3 to 7 degrees, and α is smaller than β. Specifically, α is a rotation angle, β is a rotation angle, and the rotation angle is slightly smaller than the rotation angle.

Specifically, the radial height between the intersection point of the anti-swelling section 3 and the screwing-in section 4 and the intersection point of the screwing-in section 4 and the screwing-out section 5 is t, and t is equal to the depth of the spinning wheel body pressed into the cylindrical piece in the working process.

In order to make the blank material flow more smoothly in the forming process, a first arc-shaped transition section is arranged between the anti-bulging section 3 and the screwing-in section 4. A second arc-shaped transition section is arranged between the screwing-in section 4 and the screwing-out section 5.

During the strong spinning forming process, the cylindrical part is deformed only in a small area where the spinning wheel is contacted with the workpiece, and the whole spinning deformation meets the principle of constant volume and the minimum law of metal flow resistance, and the material flow in the spinning area mainly follows the following three directions:

(1) the material flows along the screwing-in section 4 of the spinning wheel in the reverse direction, and the material flows along the axial direction through a second arc-shaped transition section between the screwing-in section 4 and the screwing-out section 5, so that the workpiece is extended;

(2) flowing along the front of the spinning wheel such that the material forms a bulge in front of the spinning wheel;

(3) the workpiece is twisted along the longitudinal direction due to the circumferential flow of the rotating wheel.

Taking the strong reverse rotation of the cylindrical part as an example, the spinning machine drives the cylindrical part blank 7 to rotate through the core mold 6 and other parts, and when the cylindrical part blank 7 reaches the expected rotation speed, the spinning wheel starts to feed. The position where the cylindrical blank 7 is firstly contacted with the spinning wheel is the intersection point of the anti-bulging section 3 and the screwing-in section 4 of the spinning wheel. At the moment, the blank material starts to flow towards the three directions under the spinning action, most of the material reversely flows along the screwing-in section 4 of the spinning wheel, and the material flows along the axial direction through a second arc-shaped transition section between the screwing-in section 4 and the screwing-out section 5, so that the workpiece is extended; a small part of material flows along the place ahead of spinning wheel, gets into anti-bulging section 3, produces the uplift, under the 3 radial stress effects of anti-bulging section, the uplift phenomenon is effectively restrained to reach the effect of preventing bulging, avoid the production of defects such as fracture, wrinkling, skinning, dimensional accuracy are not enough.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. The utility model provides a powerful spinning of cylinder prevents uplift revolves wheel, a serial communication port, including revolving the wheel main part, it is provided with a mounting hole to revolve wheel main part middle part, it prevents uplift section, screw in section and the section of screwing out to have set gradually by preceding to the back along the axial on the wheel main part outer wall to revolve, prevent the uplift section the screw in section with the section of screwing out is straight section, prevent the uplift section with the contained angle of the central axis of revolving the wheel main part is gamma, the screw in section with the contained angle of the central axis of revolving the wheel main part is alpha, the section of screwing out with the contained angle of the central axis of revolving the wheel main part is beta, and gamma is less than alpha.

2. The cylindrical member power spinning anti-bulging spinning wheel according to claim 1, wherein α is 20 to 30 degrees, β is 20 to 30 degrees, γ is 3 to 7 degrees, and α is smaller than β.

3. The cylinder power spinning anti-bulging spinning wheel according to claim 1, wherein a radial height between an intersection point of the anti-bulging section and the screwing-in section and an intersection point of the screwing-in section and the screwing-out section is t, and t is equal to a depth of the spinning wheel body pressed into the cylinder during operation.

4. The cylinder power spinning anti-bulging spinning wheel according to claim 1, wherein a first arc-shaped transition section is arranged between the anti-bulging section and the screwing section.

5. The cylinder power spinning anti-bulging spinning wheel according to claim 1, wherein a second arc-shaped transition section is arranged between the screwing-in section and the screwing-out section.