CN115415451A - Bidirectional no-idle-stroke plate type cross wedge rolling die for ball parts and forming method - Google Patents
Bidirectional no-idle-stroke plate type cross wedge rolling die for ball parts and forming method Download PDFInfo
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- CN115415451A CN115415451A CN202210899766.2A CN202210899766A CN115415451A CN 115415451 A CN115415451 A CN 115415451A CN 202210899766 A CN202210899766 A CN 202210899766A CN 115415451 A CN115415451 A CN 115415451A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/14—Making articles shaped as bodies of revolution balls, rollers, cone rollers, or like bodies
Abstract
The invention relates to the technical field of metal plastic forming processes, and provides a two-way no-idle-stroke plate type cross wedge rolling die and a forming method for ball parts. The two plate-type dies with the reverse symmetrical cavities on the surfaces move linearly in opposite directions, and the metal blank is rotationally formed under the action of the die cavities, so that continuous radial compression and axial extension deformation are realized to obtain the required ball parts. And (3) performing one-way movement forming on the plate type die to obtain a group of ball parts, discharging, feeding again, performing reverse backspacing movement in opposite directions on the two dies, and performing one-way movement forming on the metal blank under the action of a die cavity to obtain a group of ball parts. The invention realizes plate-type cross wedge rolling forming of ball parts without idle stroke, obviously improves production efficiency, greatly reduces cost, has few processes, can be used for mass production of ball parts, and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of metal plastic forming processes, in particular to a two-way no-idle-stroke plate type cross wedge rolling die and a forming method for a ball part.
Background
The ball parts are important products indispensable to the application of industrial departments such as mines, building materials, coal and the like, the manufacture of bearings and the like. The current production methods are mainly focused on casting, forging, cold heading, and in recent years emerging skew rolling. The traditional casting, forging, cold heading forming and other processes have low production efficiency, poor working environment and higher requirements on equipment. Although the ball part is formed by skew rolling, the ball part has the advantage of high production efficiency, but the formed ball part has poor dimensional precision, serious surface defects and low mechanical property, and can not be used for production and manufacturing with high requirements on the mechanical property, such as bearing manufacturing and the like. Therefore, it is urgently needed to develop a new ball part forming method to meet the requirements of mass and high-efficiency production of metal ball parts which have good mechanical properties and high dimensional accuracy and can be used for bearing manufacturing.
Cross wedge rolling is known to be an important component of today's advanced manufacturing technology as an efficient metal plastic forming process. The plate type wedge cross rolling forming technology is low in difficulty, rolling mill equipment is simple and easy to manufacture, and due to the fact that a flat plate type die is adopted, die machining can be completed only through a common planer or milling machine, die manufacturing cost is greatly reduced, and the plate type wedge cross rolling forming technology is advocated in recent years. However, the traditional plate type wedge cross rolling has the problem of back empty stroke during reciprocating motion, so that the production efficiency of the traditional plate type wedge cross rolling is lower than that of roll type and arc type wedge cross rolling, generally 4-10 wedge (pairs) per minute, and the large-area popularization and use of the traditional plate type wedge cross rolling are influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a bidirectional no-idle stroke plate type cross wedge rolling die and a forming method for ball parts, wherein 2 groups of ball parts can be formed by reciprocating the die once, and the production efficiency is greatly improved.
The invention adopts the following technical scheme:
on one hand, the invention provides a two-way no-idle-stroke plate type cross wedge rolling die for ball parts, which comprises an upper die and a lower die;
the upper die and the lower die are of an integral plate type structure; the lower bottom surface of the upper die is provided with a first half forming area and a second half forming area, and the upper surface of the lower die is correspondingly provided with a third half forming area and a fourth half forming area; the first half forming zone and the third half forming zone form an advancing stage forming zone, and the second half forming zone and the fourth half forming zone form a retracting stage forming zone;
the forward stage forming area is used for cross wedge rolling the metal round bar stock to obtain a batch of a plurality of ball parts in the forward stage of the die, and the backward stage forming area is used for cross wedge rolling the metal round bar stock to obtain another batch of a plurality of ball parts in the backward stage of the die.
In any of the above possible implementations, there is further provided an implementation in which the first half-forming zone, the second half-forming zone, the third half-forming zone, and the fourth half-forming zone each include a plurality of passes of half-forming cavities arranged side by side, and adjacent half-forming cavities are separated from each other by a rib; the length of the semi-forming cavity is gradually reduced from the middle pass to the two side passes;
the semi-forming cavity with multiple passes arranged in the first semi-forming area and the semi-forming cavity with multiple passes correspondingly arranged in the third semi-forming area form a complete multi-pass forming cavity, and the complete multi-pass forming cavity is used for carrying out wedge cross rolling on a metal round bar material once in the advancing stage of the mold to obtain multiple spherical parts;
and the multi-pass semi-forming cavity arranged in the second semi-forming area and the multi-pass semi-forming cavity correspondingly arranged in the fourth semi-forming area form a complete multi-pass forming cavity, and the multi-pass semi-forming cavity is used for performing wedge cross rolling on the metal round bar material at one time in the mold retraction stage to obtain a plurality of spherical parts.
In any of the above possible implementations, there is further provided an implementation in which the first half-forming section and the second half-forming section are arranged in parallel and are in reverse symmetry; the third half forming area and the fourth half forming area are arranged in parallel and are in reverse symmetry.
Any one of the above possible implementation manners further provides an implementation manner, and during the forming process, the first half forming area and the third half forming area are always symmetrical with respect to the metal round bar material; the second half-forming and fourth half-forming zones are always symmetrical with respect to the round bar of metal.
There is further provided in accordance with any of the possible implementations described above an implementation in which the first, second, third and fourth semi-forming zones each comprise a wedging section, a forming section and a finishing section arranged in that order;
the wedging section is used for wedging a wedge point of a die into a metal round bar, the convex edge of the forming section is gradually raised to a set height, the convex edge of the finishing section is kept at the set height, the rear section of the finishing section is provided with a cutting-off section, and the cutting-off section is provided with a cutting-off convex edge used for cutting off a connecting neck between adjacent ball parts.
In any of the above possible implementations, there is further provided an implementation in which the rib is rounded at the top, and the wedge tip of the wedging section is trapezoidal or triangular.
The wedge tip can be generally triangular, and the more optimized mode is trapezoidal. The reason for the trapezoidal shape of the wedge tip: generally, wedge points in the prior art are triangular and are mainly used for forming shaft parts. The inventor finds in practical tests and simulations that when the cross wedge rolling technology is used for forming ball parts, the trapezoidal wedge point is adopted, so that the efficiency is higher and the technical effect is better.
In any of the above possible implementations, there is further provided an implementation in which, in the finishing section, a gap is left between the ribs of the upper and lower molds, and a connecting neck is formed during the forming process, and the size of the connecting neck and the diameter of the formed ball have a proportional relationship. Such as forming a larger diameter ball, the corresponding connecting neck is also larger, and vice versa. The neck diameter (i.e., the clearance between the upper and lower die ribs) is defined as follows:
25％*D<d<35％*D；
wherein D is the diameter of the connecting neck, and D is the diameter of the formed ball part corresponding to the corresponding cavity.
The neck is too small in diameter and is easily cut off prematurely, so that the finishing stage is not fully functional and the neck is broken; if the diameter of the connecting neck is too large, the connecting neck is difficult to cut off, and the connecting neck is in a shape of a candied gourd after rolling and cannot be completely cut off; the requirements of the actual process cannot be met, so the parameters need to be limited.
According to any one of the above possible implementation manners, an implementation manner is further provided, and the upper part of the wedge point of the wedging section is provided with a fillet, so that stress concentration in the rolling process can be reduced, and the service life of the die can be prolonged.
Any of the possible implementations described above, further provides an implementation in which the range of lengths of the cutting lug is:
L/4<l<L/2；
wherein L is the cutting rib length, and L is the total length of the finishing section.
In any of the above possible implementations, there is further provided an implementation in which the upper mold and the lower mold are both horizontally arranged; or the upper die and the lower die are both vertically arranged.
On the other hand, the invention also provides a bidirectional no-idle-stroke plate type cross wedge rolling forming method for the ball parts, which uses the bidirectional no-idle-stroke plate type cross wedge rolling die for the ball parts, and the forming method comprises the following steps:
s1, a mold advancing stage: the method comprises the following steps that a first round metal bar is sent to a wedge-forming position between a first half forming area of an upper die and a third half forming area of a lower die in advance, the upper die and the lower die move linearly in a constant speed and reverse direction, the first round metal bar is compressed in a radial direction and extends in an axial direction under the action of a wedging section, a forming section and a finishing section of the dies to form a plurality of ball parts with set sizes, and after forming is finished, the ball parts are separated from the dies to be recycled;
s2, a mold retraction stage: and a second round metal bar is sent to a wedge-forming position between a second half forming area of the upper die and a fourth half forming area of the lower die in advance, the upper die and the lower die perform linear retraction movement in the constant speed and reverse direction, the second round metal bar is radially compressed and axially extended under the action of a wedging section, a forming section and a finishing section of the dies to form a plurality of ball parts with set sizes, and after forming, the ball parts are separated from the dies to be recovered.
Any of the possible implementations described above further provides an implementation where the first and second metal bar materials are the same size.
Any possible implementation manner further provides an implementation manner that the axial symmetry plane of the first metal round bar material is superposed with the central symmetry plane of the plate type cross wedge rolling die in the advancing stage; the axial symmetry plane of the second metal round bar material is superposed with the central symmetry plane of the plate type cross wedge rolling die in the retraction stage.
In any of the above possible implementation manners, there is further provided an implementation manner, in step S1 and step S2, the action process of the metal round bar material in the die wedging section, the forming section and the finishing section is as follows:
the die wedging section is wedged into the middle part of the metal round bar; with the rising of the convex ribs of the forming section of the die, the metal round bar is gradually formed into a plurality of metal balls with connecting necks by the complete forming cavity; finishing the spherical profile of the metal ball with the connecting neck in a finishing section of the die; at the end of the finishing section of the die, the connecting necks between adjacent metal balls are cut by the cutting ribs and separated into a plurality of complete ball parts.
Any of the possible implementations described above further provides an implementation in which the forming method is used in a hot forming, warm forming, cold forming process, and the rolled diameter of the ball part is in the range of phi 3-phi 100.
The beneficial effects of the invention are as follows: the invention innovatively designs the die, and simultaneously adopts the porous plate type cross wedge rolling die with the forming cavities arranged symmetrically in the reverse direction, so that no idle stroke exists in the reciprocating motion process of plate type cross wedge rolling forming, and 2 groups of ball parts can be formed by one-time reciprocating motion; the method has the advantages of obviously improving the production efficiency, being easy to realize, low manufacturing cost and the like, can be used for plate-type wedge cross rolling forming mass production of ball parts, and has wide application prospect.
Drawings
Fig. 1 is a schematic structural diagram of a ball part bidirectional no-idle-stroke plate type cross wedge rolling die according to an embodiment of the present invention.
FIG. 2 is a schematic side view of an upper mold and a lower mold in the embodiment.
FIG. 3 is a schematic view of a mold half-forming cavity according to an embodiment.
FIG. 4 is a schematic end view of the lower mold in the example.
Fig. 5 is a schematic view showing the wedge point of the wedge segment in the embodiment of the invention is triangular.
Fig. 6 is a schematic view showing the wedge point of the wedge segment in the embodiment in a trapezoidal shape.
FIG. 7 is a schematic view of a plurality of ball components with connecting necks according to an embodiment.
In the figure: 1, mounting a mold; 2-metal round bar stock; 3-lower mould; 4-a first semi-forming zone; 5-a second semi-forming zone; 6-a third semi-forming zone; 7-fourth semi-forming zone.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the specific drawings. It should be noted that technical features or combinations of technical features described in the following embodiments should not be considered as being isolated, and they may be combined with each other to achieve better technical effects. In the drawings of the embodiments described below, the same reference numerals appearing in the various drawings denote the same features or components, and may be applied to different embodiments.
As shown in fig. 1 and fig. 2, a two-way no-idle-stroke plate type cross wedge rolling die for ball parts according to an embodiment of the present invention includes an upper die 1 and a lower die 3; the upper die 1 and the lower die 3 are both of an integral plate type structure; a first half forming area 4 and a second half forming area 5 are arranged on the lower bottom surface of the upper die 1, and a third half forming area 6 and a fourth half forming area 7 are correspondingly arranged on the upper surface of the lower die 3; the first and third semi-forming zones 4, 6 form an advancing stage forming zone, the second and fourth semi-forming zones 5, 7 form a retracting stage forming zone; the forward stage forming area is used for performing wedge cross rolling on the metal round bar stock 2 to obtain a batch of a plurality of ball parts in the forward stage of the die, and the backward stage forming area is used for performing wedge cross rolling on the metal round bar stock 2 to obtain another batch of a plurality of ball parts in the backward stage of the die.
In a particular embodiment, as shown in fig. 1 and 3, each of said first semi-forming zone 4, second semi-forming zone 5, third semi-forming zone 6 and fourth semi-forming zone 7 comprises a plurality of passes of semi-forming cavities arranged side by side, adjacent semi-forming cavities being separated from each other by a rib; the length of the semi-forming cavity is gradually reduced from the middle pass to the two side passes; the multi-pass semi-forming cavity arranged in the first semi-forming area 4 and the multi-pass semi-forming cavity correspondingly arranged in the third semi-forming area 6 form a complete multi-pass forming cavity, and the complete multi-pass forming cavity is used for performing wedge cross rolling on the metal round bar 2 once in the advancing stage of the die to obtain a plurality of spherical parts; the multi-pass semi-forming cavity arranged in the second semi-forming area 5 and the multi-pass semi-forming cavity correspondingly arranged in the fourth semi-forming area 7 form a complete multi-pass forming cavity, and the complete multi-pass forming cavity is used for performing wedge cross rolling on the metal round bar 2 at one time in the mold retraction stage to obtain a plurality of spherical parts.
In a particular embodiment, said first semifinished zones 4 are arranged side by side, with opposite symmetry, with the second semifinished zones 5; the third half forming area 6 and the fourth half forming area 7 are arranged in parallel and are in reverse symmetry.
In another particular embodiment, the first semifinished zone 4 is juxtaposed with the second semifinished zone 5, but need not be inversely symmetrical; the half-forming chambers of the first and second half-forming zones 4, 5 may be different in number of passes, with the result that the ball part formed during the forward stage of the die is different in number from the ball part formed during the backward stage of the die.
In a specific embodiment, during the forming process, the first half-forming zone 4 and the third half-forming zone 6 are always symmetrical with respect to the metal round bar 2; the second half-forming zone 5 and the fourth half-forming zone 7 are always symmetrical with respect to the metal round bar 2.
In a particular embodiment, the first 4, second 5, third 6 and fourth 7 semi-forming zones each comprise a wedging section, a forming section and a finishing section; the wedging section is used for wedging a wedge point of a die into a metal round bar material 2, the convex edge of the forming section is gradually raised to a set height, the convex edge of the finishing section is kept at the set height, the rear section of the finishing section is provided with a cutting-off section, and the cutting-off section is provided with a cutting-off convex edge and used for cutting off a connecting neck between adjacent ball parts.
In a specific embodiment, the convex edge is rounded at the top, and the wedge tip of the wedging section is trapezoidal or triangular; the triangular wedge point is shown in figure 5, and the trapezoidal wedge point is shown in figure 6. The trapezoidal wedge point can enable the ball part to have higher quality after wedge lifting and connection neck cutting.
In one embodiment, the neck diameter size (i.e., the clearance between the upper and lower die ribs) is in the following relationship: 25% + D <35% + D; wherein D is the diameter of the connecting neck, and D is the diameter of the formed ball part corresponding to the corresponding cavity.
In one embodiment, the wedge point of the wedging section is provided with a round angle at the upper part, so that the stress concentration in the rolling process can be reduced, and the service life of the die is prolonged.
In one embodiment, the length of the cutting lug ranges from: l/4< -L < -2 >; wherein L is the cutting rib length, and L is the total length of the finishing section.
In a specific embodiment, the upper die 1 and the lower die 3 are both horizontally arranged; or the upper die 1 and the lower die 3 are both vertically arranged, so that the purpose of the invention can be achieved.
The invention embodiment relates to a ball part bidirectional no-idle stroke plate type cross wedge rolling forming method, which uses the ball part bidirectional no-idle stroke plate type cross wedge rolling die, and the forming method comprises the following steps:
s1, a mold advancing stage: a first metal round bar material 2 is sent to a wedge-forming position between a first half forming area 4 of an upper die 1 and a third half forming area 6 of a lower die 3 in advance, the upper die 1 and the lower die 3 move forward in a constant speed and reverse straight line, the first metal round bar material 2 is compressed in a radial direction and extends in an axial direction under the action of a die wedging section, a forming section and a finishing section, a plurality of ball parts with set sizes are formed, and after forming is finished, the ball parts are separated from the dies and recovered;
s2, a mold retraction stage: the second metal round bar 2 is sent to a wedge-starting position between a second half forming area 5 of the upper die 1 and a fourth half forming area 7 of the lower die 3 in advance, the upper die 1 and the lower die 3 perform constant-speed reverse linear retraction movement, the second metal round bar 2 is radially compressed and axially extended under the action of a die wedging section, a forming section and a finishing section, a plurality of ball parts with set sizes are formed, and after the forming is finished, the ball parts are separated from the dies and recovered. The die tip configuration is shown in fig. 4.
In one particular embodiment, the first metal bar stock 2 and the second metal bar stock 2 are the same size.
In one specific embodiment, the axial symmetry plane of the first metal round bar stock 2 is coincident with the central symmetry plane of the plate type cross wedge rolling die in the advancing stage; the axial symmetry plane of the second round metal bar 2 is coincident with the central symmetry plane of the die in the retraction stage of the plate type cross wedge rolling die.
In one embodiment, in steps S1 and S2, the metal round bar 2 is processed in the die wedging section, the forming section and the finishing section as follows:
the die wedging section is wedged in the middle of the metal round bar 2; with the rising of the convex edge of the forming section of the die, the round metal bar 2 is gradually formed into a plurality of metal balls with connecting necks by the complete forming cavity, as shown in fig. 7; finishing the spherical contour of the metal ball with the connecting neck in a finishing section of the die; at the end of the finishing section of the die, the connecting necks between adjacent metal balls are cut off by the cutting ribs and separated into a plurality of complete ball parts.
The forming method can be used for hot forming, warm forming and cold forming processes, and the rolling diameter range of the ball parts is phi 3-phi 100.
The invention innovatively designs the die, adopts the plate type cross wedge rolling die with two forming cavities which are arranged in parallel and in reverse symmetry, greatly reduces the manufacturing cost of the die, simultaneously ensures that the two forming cavities alternately act in the reciprocating motion process of the plate type cross wedge rolling, ensures that no idle stroke exists, can form two groups of ball parts by one reciprocating motion, doubles the production efficiency and greatly reduces the production cost.
While several embodiments of the present invention have been presented herein, it will be appreciated by those skilled in the art that changes may be made to the embodiments herein without departing from the spirit of the invention. The above examples are merely illustrative and should not be taken as limiting the scope of the invention.
Claims (10)
1. A ball part bidirectional no-idle stroke plate type cross wedge rolling die is characterized in that the die comprises an upper die and a lower die;
the upper die and the lower die are of an integral plate type structure; the lower bottom surface of the upper die is provided with a first half forming area and a second half forming area, and the upper surface of the lower die is correspondingly provided with a third half forming area and a fourth half forming area; the first half forming zone and the third half forming zone form an advancing stage forming zone, and the second half forming zone and the fourth half forming zone form a retracting stage forming zone;
the forward stage forming area is used for cross wedge rolling the metal round bar stock to obtain a batch of a plurality of ball parts in the forward stage of the die, and the backward stage forming area is used for cross wedge rolling the metal round bar stock to obtain another batch of a plurality of ball parts in the backward stage of the die.
2. The bidirectional no-idle-stroke plate type cross wedge rolling die for the ball parts as claimed in claim 1, wherein each of the first half forming zone, the second half forming zone, the third half forming zone and the fourth half forming zone comprises a plurality of passes of half forming cavities arranged side by side, and the adjacent half forming cavities are separated from each other by a rib; the length of the semi-forming cavity is sequentially decreased from the middle pass to the two side passes;
the semi-forming cavity with multiple passes arranged in the first semi-forming area and the semi-forming cavity with multiple passes correspondingly arranged in the third semi-forming area form a complete multi-pass forming cavity, and the complete multi-pass forming cavity is used for carrying out wedge cross rolling on a metal round bar material once in the advancing stage of the mold to obtain multiple spherical parts;
and the multiple-pass semi-forming cavity arranged in the second semi-forming area and the multiple-pass semi-forming cavity correspondingly arranged in the fourth semi-forming area form a complete multiple-pass forming cavity, and the complete multiple-pass semi-forming cavity is used for performing wedge cross rolling on the metal round bar material at one time in the mold returning stage to obtain multiple spherical parts.
3. The bidirectional no-empty-stroke plate type cross wedge rolling die for the ball parts as claimed in claim 1, wherein the first half forming area and the second half forming area are arranged in parallel and are in reverse symmetry; the third half forming area and the fourth half forming area are arranged in parallel and are in reverse symmetry.
4. The bidirectional no-empty-stroke plate type cross wedge rolling die for the ball part as claimed in claim 2, wherein the first half forming area, the second half forming area, the third half forming area and the fourth half forming area each comprise a wedging section, a forming section and a finishing section which are arranged in sequence;
the wedging section is used for wedging a wedge point of a die into a metal round bar, the convex edge of the forming section is gradually raised to a set height, the convex edge of the finishing section is kept at the set height, the rear section of the finishing section is provided with a cutting-off section, and the cutting-off section is provided with a cutting-off convex edge used for cutting off a connecting neck between adjacent ball parts.
5. The bi-directional no-empty stroke plate type cross wedge rolling die for ball parts as claimed in claim 4, wherein the convex rib is rounded at the top, and the wedge tip of the wedging section is trapezoidal or triangular.
6. The ball part bidirectional no-empty stroke plate type cross wedge rolling die as claimed in claim 4, wherein the length range of the cutting convex rib is as follows:
L/4＜l＜L/2；
wherein L is the length of the cutting rib, and L is the total length of the finishing section.
7. The ball part bidirectional no-idle stroke plate type cross wedge rolling die as claimed in claim 1, wherein the upper die and the lower die are both horizontally arranged; or the upper die and the lower die are both vertically arranged.
8. A ball part bidirectional no-idle-stroke plate type cross wedge rolling forming method is characterized in that the forming method uses the ball part bidirectional no-idle-stroke plate type cross wedge rolling die according to any one of claims 1 to 7, and the forming method comprises the following steps:
s1, a mold advancing stage: the method comprises the following steps that a first round metal bar is sent to a wedge-forming position between a first half forming area of an upper die and a third half forming area of a lower die in advance, the upper die and the lower die move linearly in a constant speed and reverse direction, the first round metal bar is compressed in a radial direction and extends in an axial direction under the action of a wedging section, a forming section and a finishing section of the dies to form a plurality of ball parts with set sizes, and after forming is finished, the ball parts are separated from the dies to be recycled;
s2, a mold retraction stage: and a second round metal bar is sent to a wedge-forming position between a second half forming area of the upper die and a fourth half forming area of the lower die in advance, the upper die and the lower die perform linear retraction movement in the constant speed and reverse direction, the second round metal bar is radially compressed and axially extended under the action of a wedging section, a forming section and a finishing section of the dies to form a plurality of ball parts with set sizes, and after forming, the ball parts are separated from the dies to be recovered.
9. The method for forming a ball part by the bidirectional plate type wedge cross rolling without idle stroke as claimed in claim 8, wherein in the step S1 and the step S2, the metal round bar material is processed in the wedge section, the forming section and the finishing section of the die as follows:
the die wedging section is wedged in the middle of the metal round bar; with the rising of the convex ribs of the forming section of the die, the metal round bar is gradually formed into a plurality of metal balls with connecting necks by the complete forming cavity; finishing the spherical profile of the metal ball with the connecting neck in a finishing section of the die; at the end of the finishing section of the die, the connecting necks between adjacent metal balls are cut off by the cutting ribs and separated into a plurality of complete ball parts.
10. The bidirectional no-idle-stroke plate-type cross wedge rolling forming method for the ball part as claimed in claim 8, wherein the forming method is used for hot forming, warm forming and cold forming processes, and the rolling diameter range of the ball part is phi 3-phi 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210899766.2A CN115415451A (en) | 2022-07-28 | 2022-07-28 | Bidirectional no-idle-stroke plate type cross wedge rolling die for ball parts and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210899766.2A CN115415451A (en) | 2022-07-28 | 2022-07-28 | Bidirectional no-idle-stroke plate type cross wedge rolling die for ball parts and forming method |
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| Publication Number | Publication Date |
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| CN115415451A true CN115415451A (en) | 2022-12-02 |
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|---|---|---|---|
| CN202210899766.2A Pending CN115415451A (en) | 2022-07-28 | 2022-07-28 | Bidirectional no-idle-stroke plate type cross wedge rolling die for ball parts and forming method |
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| CN (1) | CN115415451A (en) |
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2022
- 2022-07-28 CN CN202210899766.2A patent/CN115415451A/en active Pending
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