Forming method and forming device for a double-rim wheel

Abstract

The present invention relates to a forming method and a forming device for a double-rim wheel. The method includes forming a wheel preform; retaining the temperature of the forging, placing the forged forging on a support die, pressing down the pressing die to press the forging, and the pressing die and the forging can rotate synchronously around the vertical direction; the first wedge-shaped rolling roll and the second wedge-shaped rolling roll are respectively located on the left and right sides of the forging, the first wedge-shaped rolling roll and the second wedge-shaped rolling roll respectively rotate around the vertical direction, the first wedge-shaped rolling roll and the second wedge-shaped rolling roll respectively extrude the forging from the horizontal direction to roll the forging, and the pressing module rotates passively to process upper and lower double rims on the forging. Different from the prior art, in the present invention, the two wedge-shaped rolling rolls rotate actively, driving the pressing die, the forging and the pressing die to rotate passively, so as to process annular upper and lower double rims on the forging. The processing process is short, the material utilization rate is high, the production efficiency is high, the energy consumption is low, the cost is saved, and the automation degree is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of double - flange wheel processing, and particularly relates to a forming method and a forming device for a double - flange wheel. Background Art

[0002] Double - flange wheels are parts with a large quantity and wide application on equipment such as cranes and construction machinery. As Figure 1 shown, it is a typical double - flange wheel, and the upper and lower ends of its outermost diameter have protruding flanges. The current main forming process for this forging product is to design the forging blank according to the maximum outer diameter, and then process the middle wheel groove by machining to form the double flanges, which results in waste of materials in the middle part.

[0003] In the following documents, more information related to the above - mentioned technical solutions can be found:

[0004] In the patent with the publication number CN110142362A, a forming method for a wheel forging used in a lifting device is disclosed. It includes the following steps: A. Heating the blank; B. Preheating the mold; C. Preparing the blank to be taken out of the furnace; D. Upsetting the blank to remove the oxide skin; E. Upsetting the blank for pre - forging; F. After the pre - forged blank is taken out of the pre - forging cavity, it is placed into the final - forging mold cavity for final forging, and the process ends when the metal fills the mold cavity.

[0005] In the patent with the publication number CN203779116U, a device for jointly producing a large - sized automobile half - shaft by a cross - wedge rolling mill and a rotary forging machine is disclosed. It includes a cross - wedge rolling mill and a rotary forging machine. There is a pair of rolling dies for rolling the blank of the large - sized automobile half - shaft on the cross - wedge rolling mill, and a rotary forging die for the flange of the large - sized automobile half - shaft in the rotary forging machine. There is a driving roller for the automobile half - shaft blank in a state with residual heat between the cross - wedge rolling mill and the rotary forging machine. One end of the driving roller is arranged at the lower front side in front of the rolling outlet of the automobile half - shaft blank in a state with residual heat on the cross - wedge rolling mill, and the end of the flange blank of the automobile half - shaft blank in a state with residual heat faces the inlet of the rotary forging die for the flange of the large - sized automobile half - shaft in the rotary forging machine.

[0006] In the process of implementing the present invention, the inventors found the following problems in the prior art:

[0007] In the prior art, the processing method for double - flange wheels is to first forge, cool after forging, and then machining to make the upper and lower ends of the outermost diameter have protruding flanges; it is necessary to first heat, forge, cool the wheel, and then cut and process the flanges. Its processing process is long, energy consumption is high, production efficiency is low, and materials are wasted. Summary of the Invention

[0008] Therefore, it is necessary to provide a forming method and forming device for a double-rim wheel, so as to solve the technical problems of the prior art double-rim wheels such as long production process, high energy consumption, low production efficiency and waste of materials.

[0009] To achieve the above objectives, in a first aspect, the inventors provide a method for forming a double-rim wheel, the method comprising:

[0010] Unloading of raw materials and heating of raw materials;

[0011] The heated raw materials are sent to a forging press for pre-forging and final forging to form a wheel preform;

[0012] Keep the forging temperature, place the forged forging on the supporting die, and press the forging downward with the pressing die. The pressing die, forging and supporting die form a pressing module, which can rotate synchronously around the vertical direction.

[0013] The first wedge roller and the second wedge roller are respectively located on the left and right sides of the forging. The first wedge roller and the second wedge roller rotate in the vertical direction respectively. The first wedge roller and the second wedge roller squeeze the forging from the horizontal direction respectively to roll the forging. The pressing module rotates passively to realize the processing of the upper and lower double rims on the forging.

[0014] After rolling is completed, the first wedge roller and the second wedge roller are reset, the pressing die is facing upward, and the finished wheel is taken out.

[0015] Different from the existing technology, the above technical solution maintains the temperature of the forging, places the forged forging on the support die, and presses the forging downward with the pressing die. The pressing die, forging, and support die rotate synchronously in the vertical direction. The first wedge roller and the second wedge roller are respectively located on the left and right sides of the forging. The first wedge roller and the second wedge roller rotate in the vertical direction. The first wedge roller and the second wedge roller squeeze the forging from the horizontal direction to roll the forging. The pressing module rotates passively to achieve the processing of the upper and lower double rims on the forging. In this way, the temperature of the forging can be used to place the forging after final forging into the rolling mill. The two wedge rollers on the left and right sides squeeze inward at the same time. The two wedge rollers rotate actively, driving the pressing die, forging, and support die to rotate passively to process the annular upper and lower double rims on the forging. The processing process is short, the material utilization rate is high, the production efficiency is high, the energy consumption is low, the cost is saved, and the degree of automation is effectively improved.

[0016] As an embodiment of the present invention, the top structure of the support die cooperates with the lower structure of the wheel preform, and the bottom structure of the pressing die cooperates with the upper structure of the wheel preform. When the pressing die presses the forging onto the pressing die downward, the wheel preform is fixed, and the pressing die, forging and support die can rotate synchronously.

[0017] In this way, the wheel preform can be fixed and limited by the top structure of the support die and the bottom structure of the pressing die to prevent the wheel preform from moving during the rolling process, resulting in poor processing accuracy or even other risks.

[0018] As an embodiment of the present invention, the support mold is arranged on the lower passive shaft and is fixedly connected to the lower passive shaft, and the lower passive shaft can rotate axially through a bearing;

[0019] The pressing die is arranged at the bottom of the upper passive shaft and is fixedly connected to the upper passive shaft. The upper passive shaft can rotate axially through a bearing.

[0020] In this way, the supporting die can rotate around the rolling mill through the cooperation of the lower passive shaft and the bearing, and the clamping die can rotate around the rolling mill through the cooperation of the upper passive shaft and the bearing; the clamping die, the forging and the clamping die can be rotated synchronously to facilitate the first wedge roller and the second wedge roller to process the annular double rims on the forging.

[0021] As an embodiment of the present invention, the pressing die presses the forging downward through a first driving unit, and the first driving unit is a pressing cylinder.

[0022] In this way, the forging is compressed and fixed by the compression cylinder, providing a stable compression force, avoiding the movement of the wheel preform during the processing, and improving the processing accuracy of the wheel preform.

[0023] As an embodiment of the present invention, the first wedge-shaped roller and the second wedge-shaped roller rotate simultaneously in a clockwise or counterclockwise direction at the same preset speed.

[0024] In this way, the synchronous rotation of the first wedge roller and the second wedge roller can drive the clamping module to rotate together, avoiding the accident risk caused by the inconsistent rotation speed of the first wedge roller and the second wedge roller on the clamping module.

[0025] As an embodiment of the present invention, the first wedge roller includes a first rolling die, a base, a first driving shaft and a first passive shaft, the first driving shaft and the first passive shaft are respectively located at the upper and lower ends of the first rolling die and are respectively fixedly connected to the first rolling die, the first driving shaft and the first passive shaft are respectively fixed to the rolling die through bearings, and the second driving unit drives the first driving shaft to rotate, thereby driving the first rolling die and the first passive shaft to rotate synchronously;

[0026] The structure of the second wedge-shaped roller is the same as that of the first wedge-shaped roller, and the second wedge-shaped roller is symmetrically arranged with respect to the first wedge-shaped roller.

[0027] In this way, the first driving unit can drive the first driving shaft to rotate, so as to realize the rotation of the first rolling die, which facilitates the extrusion processing of the wheel preform by the first rolling die and the second rolling die.

[0028] As an implementation manner of the present invention, the rolling die includes a wedge-shaped processing head, and the shape of the wedge-shaped processing head gradually increases from one end to the other end.

[0029] In this way, through the wedge-shaped processing head, the smaller end first contacts the wheel preform, and then slowly extrudes the wheel preform to expand the processing range. The extrusion process is repeated continuously, and finally an upper and lower double wheel rim is formed.

[0030] As an implementation manner of the present invention, the third driving unit drives the first wedge-shaped rolling roll and the second wedge-shaped rolling roll to approach the forging along the horizontal direction respectively, and the first wedge-shaped rolling roll and the second wedge-shaped rolling roll approach or move away from the forging simultaneously.

[0031] In this way, the third driving unit realizes that the first wedge-shaped rolling roll and the second wedge-shaped rolling roll approach or move away from the wheel preform along the horizontal direction simultaneously, realizes automatic processing, avoids the unilateral approach or separation of the first wedge-shaped rolling roll from the wheel preform, makes the entire pressing module receive unilateral force, and reduces the service life of the bearing.

[0032] To achieve the above object, in a second aspect, the inventor provides a forming device for a double-wheel-rim wheel. The forming device includes a first wedge-shaped rolling roll, a second wedge-shaped rolling roll, a support die, a pressing die, a first driving unit, a second driving unit and a third driving unit;

[0033] The support die is used for placing the forging. The first driving unit is used for driving the pressing die to approach or move away from the support die to press the forging, and the pressing die, the forging and the support die can rotate synchronously around the vertical direction;

[0034] The first wedge-shaped rolling roll includes a first rolling die, the second wedge-shaped rolling roll includes a second rolling die, the second driving unit is used for driving the first rolling die and the second rolling die to rotate around the vertical direction, and the first rolling die and the second rolling die rotate in the same rotation direction;

[0035] The third driving unit is used for driving the first wedge-shaped rolling roll and the second wedge-shaped rolling roll to approach or move away from the forging, so that the first wedge-shaped rolling roll and the second wedge-shaped rolling roll perform rolling forming on the forging.

[0036] Different from the prior art, in the forming device of the double-rim wheel of the technical solution of the present application, the cooperation of the first wedge roll, the second wedge roll, the support die, and the pressing die can utilize the temperature of the forging. After the final forging of the forging, it is placed in the rolling mill. Through the two wedge rolls on the left and right sides, it is simultaneously extruded inward. The two wedge rolls rotate actively, driving the pressing die, the forging, and the support die to rotate passively, so as to process an annular upper and lower double rim for the forging. Its processing process is short, the material utilization rate is high, the production efficiency is high, the energy consumption is low, and the cost is saved; the first driving unit, the second driving unit, and the third driving unit effectively improve the degree of automation.

[0037] As an implementation manner of the present invention, the forming device further includes a manipulator for picking and placing forgings.

[0038] In this way, between the final forging equipment and the forming device of the forging, a manipulator for picking and placing forgings can be provided to achieve seamless connection between the final forging equipment and the forming device, and avoid the safety problems brought by manual operation.

[0039] The above related description of the invention content is only an overview of the technical solution of the present application. In order to enable those of ordinary skill in the art to more clearly understand the technical solution of the present application, and then can be implemented according to the content recorded in the text of the specification and the drawings, and in order to make the above objects, other objects, features and advantages of the present application more easily understood, the following is described in conjunction with the specific implementation manners and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings are only used to show the principles, implementation manners, applications, features, effects, etc. of the specific implementation manners and other related contents of the present application, and should not be considered as a limitation to the present application.

[0041] In the drawings of the specification:

[0042] Figure 1 is a schematic structural diagram of a double-rim wheel shown in the background art of the present application;

[0043] Figure 2 is a schematic logic diagram of a forming method of a double-rim wheel according to an embodiment of the present application;

[0044] Figure 3 is a schematic structural diagram of a raw material according to an embodiment of the present application;

[0045] Figure 4 is a schematic structural diagram of a wheel preform according to an embodiment of the present application;

[0046] Figure 5 is a schematic structural diagram of a double-rim wheel according to an embodiment of the present application;

[0047] Figure 6Schematic diagram of the state of a double - flanged wheel processed by a rolling mill according to an embodiment of the present application;

[0048] Figure 7 Schematic diagram of the structure of a forming device according to an embodiment of the present application;

[0049] Figure 8 Schematic diagram of the rotation of the first wedge - shaped rolling mill and the second wedge - shaped rolling mill according to an embodiment of the present application;

[0050] Figure 9 Developed plan view of the first rolling die according to an embodiment of the present application.

[0051] The reference numerals involved in the above - mentioned respective drawings are explained as follows:

[0052] 1. The first wedge - shaped rolling mill,

[0053] 11. The first rolling die, 111. Wedge - shaped processing head, 12. Base, 13. First driving shaft, 14. First driven shaft,

[0054] 2. The second wedge - shaped rolling mill,

[0055] 3. Support die,

[0056] 31. Lower driven shaft,

[0057] 4. Compression die,

[0058] 41. Upper driven shaft,

[0059] 5. Wheel preform,

[0060] 6. Compression oil cylinder. Detailed implementation manners

[0061] To describe in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of the present application, etc., the following is described in detail with reference to the specific examples listed and in conjunction with the attached drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0062] Referring to "embodiment" herein means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it particularly limited to its independence or relevance to other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0063] Unless otherwise defined, the meanings of technical terms used herein are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0064] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this article generally represents an "or" logical relationship between the associated objects before and after.

[0065] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary-secondary or order relationship, etc. between these entities or operations.

[0066] Without further limitation, in this application, the expressions "including", "comprising", "having" or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude that there may be additional elements in the process, method or product including the said elements, so that a process, method or product including a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0067] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding" are understood not to include the number itself; expressions such as "above", "below", "within" are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "multiple" is two or more (including two), and similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically limited.

[0068] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiments of this application or for the convenience of readers' understanding, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of this application.

[0069] Unless otherwise clearly specified or defined, the terms "installed", "connected", "joined", "fixed", "set", etc. used in the description of the embodiments of the present application should be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection or an indirect connection through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0070] Double - rim wheels are large - quantity and wide - spread parts widely used in equipment such as cranes and construction machinery. For example, Figure 1 As shown, it is a typical double - rim wheel, and the upper and lower ends of its outermost diameter have protruding rims. The current main forming process of this forging product is to design the forging blank according to the maximum outer diameter, and then process the middle wheel groove by machining to form double rims, which results in waste of materials in the middle part.

[0071] In the prior art, there are currently two ways to form forgings of this shape. One is to use the design method of a split die. This process is relatively practical for small forgings. For heavy forgings, the equipment has a large tonnage, the die is complex, and it is easy to cause unstable workpiece dimensions. The other is to use the ring rolling forming process. This process is applicable to forgings with holes in the middle and is not applicable to products with a shape but no holes in the middle.

[0072] In the prior art, the processing method of double - rim wheels is to first forge, cool after forging, and then process the rims with protruding upper and lower ends of the outermost diameter by machining; it is necessary to first heat the wheels, forge, cool, and then cut and process the rims. Its processing technology is long, energy consumption is high, production efficiency is low, and materials are wasted.

[0073] The applicant has found through research that by using the temperature of the forging, the forging after final forging can be put into a rolling mill, and through two wedge - shaped rolling rolls on the left and right sides, simultaneously extruded inward. The two wedge - shaped rolling rolls rotate actively, driving the pressing die, the forging, and the pressing die to rotate passively, so as to process the upper and lower double rims of the ring shape on the forging. Its processing technology is short, the material utilization rate is high, the production efficiency is high, the energy consumption is low, the cost is saved, and the degree of automation is effectively improved.

[0074] The present application relates to a forming method and a forming device for a double - rim wheel, which can be applied to various technical scenarios of double - rim wheel processing.

[0075] According to some embodiments of the present application, please refer to Figures 1 to 9 , this embodiment relates to a forming method for a double - rim wheel, and the method includes:

[0076] S10, unloading raw materials and heating the raw materials;

[0077] S20, sending the heated raw materials to a forging press for pre-forging and final forging to form a wheel preform 5;

[0078] S30, while maintaining the temperature of the forging, place the forged forging on the supporting die 3, and press the forging downward with the pressing die 4. The pressing die 4, the forging, and the supporting die 3 form a pressing die 4, which can rotate synchronously in the vertical direction.

[0079] S40, the first wedge roller 1 and the second wedge roller 2 are respectively located on the left and right sides of the forging, and the first wedge roller 1 and the second wedge roller 2 are respectively rotated in the vertical direction. The first wedge roller 1 and the second wedge roller 2 are respectively pressed toward the forging from the horizontal direction to roll the forging, and the four pressing dies are passively rotated to achieve the upper and lower double rims of the forging;

[0080] S50: After rolling is completed, the first wedge roller 1 and the second wedge roller 2 are reset, the pressing die 4 is turned upward, and the finished wheel is taken out.

[0081] In this embodiment, the blank size is determined based on the final weight of the forging. This determines the blank weight, and since the entire process involves forging and rolling, it does not inherently reduce the weight significantly. In this embodiment, round bar stock is used and heated in a gas furnace or an intermediate frequency furnace. After heating, the blank is sent to a forging press for pre-forging and final forging. The final forged forging is then placed in a rolling mill to form the wheel groove.

[0082] In this embodiment, the finished forging is placed on the support die, and the hold-down die presses down to compact the forging. The first and second wedge rollers rotate simultaneously at a speed V to roll the forging, while the hold-down system rotates passively. After the rolling process is complete, the rollers return to their initial position, the hold-down die opens, and the workpiece is removed.

[0083] In this embodiment, by maintaining the temperature of the forging, the forged forging is placed on the supporting die 3, and the pressing die 4 presses the forging downward. The pressing die 4, the forging and the supporting die 3 rotate synchronously around the vertical direction; the first wedge roller 1 and the second wedge roller 2 are respectively located on the left and right sides of the forging, and the first wedge roller 1 and the second wedge roller 2 respectively rotate around the vertical direction. The first wedge roller 1 and the second wedge roller 2 respectively squeeze the forging from the horizontal direction to roll the forging, and the four pressing dies passively rotate to achieve the processing of the upper and lower double rims on the forging.

[0084] In this way, by utilizing the temperature of the forging, the forging after final forging can be placed into a rolling mill, and through two wedge-shaped rolling rolls on the left and right sides, simultaneously extruded inward. The two wedge-shaped rolling rolls rotate actively, driving the pressing die 4, the forging, and the supporting die 3 to rotate passively, so as to process a ring-shaped upper and lower double rim for the forging. Its processing technology is short, with high material utilization rate, high production efficiency, low energy consumption, cost savings, and effectively improves the degree of automation.

[0085] According to some embodiments of the present application, optionally, the top structure of the supporting die 3 is matched with the lower structure of the wheel preform 5, and the bottom structure of the pressing die 4 is matched with the upper structure of the wheel preform 5. When the pressing die 4 presses the forging downward onto the pressing die 4, the wheel preform 5 is fixed, and the pressing die 4, the forging, and the supporting die 3 can rotate synchronously.

[0086] As Figure 6 shown, the shape of the top of the supporting die 3 corresponds to the lower structure of the wheel preform 5, and there is a convex die on the supporting die 3. The shape of the bottom of the pressing die 4 corresponds to the upper structure of the wheel preform 5. The upper and lower parts of the wheel preform 5 are just relative positions, Figure 6 the upper and lower parts shown in

[0087] In this way, through the top structure of the supporting die 3 and the bottom structure of the pressing die 4, the wheel preform 5 can be fixed and limited, avoiding the movement of the wheel preform 5 during the rolling process, resulting in poor processing accuracy or even other risks.

[0088] According to some embodiments of the present application, optionally, the supporting die 3 is arranged on the lower passive shaft 31 and fixedly connected to the lower passive shaft 31. The lower passive shaft 31 can rotate axially through a bearing; the pressing die 4 is arranged at the bottom of the upper passive shaft 41 and fixedly connected to the upper passive shaft 41. The upper passive shaft 41 can rotate axially through a bearing.

[0089] In this way, the supporting die 3 can rotate around the rolling mill through the cooperation of the lower passive shaft 31 and the bearing, and the pressing die 4 can rotate around the rolling mill through the cooperation of the upper passive shaft 41 and the bearing; it can achieve the synchronous rotation of the pressing die 4, the forging, and the supporting die 4, so as to facilitate the first wedge-shaped rolling roll 1 and the second wedge-shaped rolling roll 2 to process a ring-shaped double rim for the forging.

[0090] According to some embodiments of the present application, optionally, the pressing die 4 presses the forging downward through a first driving unit, and the first driving unit is a pressing oil cylinder 6.

[0091] The pressing oil cylinder 6 expands and contracts downward, and the output end of the pressing oil cylinder 6 is connected to the pressing die 4, for driving the pressing die 4 to press downward.

[0092] In this way, the forging is pressed and fixed by the pressing oil cylinder 6 to provide a stable pressing force, avoiding the movement of the wheel preform 5 during the processing and improving the processing accuracy of the wheel preform 5.

[0093] According to some embodiments of the present application, optionally, the first wedge-shaped roll 1 and the second wedge-shaped roll 2 rotate simultaneously clockwise or counterclockwise at the same preset speed.

[0094] In this embodiment, the same preset speed V can be adjusted according to the wheels actually produced.

[0095] In this way, through the synchronous rotation of the first wedge-shaped roll 1 and the second wedge-shaped roll 2, the pressing die 4 can be uniformly driven to rotate together, avoiding the accidental risks caused by the inconsistent rotation speeds of the first wedge-shaped roll 1 and the second wedge-shaped roll 2 for the pressing die 4.

[0096] According to some embodiments of the present application, optionally, the first wedge-shaped roll 1 includes a first rolling die 11, a base 12, a first driving shaft 13 and a first driven shaft 14. The first driving shaft 13 and the first driven shaft 14 are respectively located at the upper and lower ends of the first rolling die 11 and are fixedly connected to the first rolling die 11. The first driving shaft 13 and the first driven shaft 14 are respectively fixed on the rolling die through bearings. The second driving unit drives the first driving shaft 13 to rotate, thereby driving the first rolling die 11 and the first driven shaft 14 to rotate synchronously; the structure of the second wedge-shaped roll 2 is the same as that of the first wedge-shaped roll 1, and the second wedge-shaped roll 2 and the first wedge-shaped roll 1 are symmetrically arranged.

[0097] In this embodiment, the base 12 has an inverted U-shaped structure. The upper end of the first driving shaft 13 is connected to the base 12 through a bearing, and the lower end of the first driving shaft 13 is fixedly connected to the first rolling die 11; the upper end of the first driven shaft 14 is fixedly connected to the first rolling die 11, and the lower end of the first driven shaft 14 is connected to the base 12 through a bearing. The structure of the second wedge-shaped roll 2 is the same as that of the first wedge-shaped roll 1 and is symmetrically arranged. The structure of the second wedge-shaped roll 2 will not be repeated here.

[0098] In this way, the second driving unit can drive the first driving shaft 13 to rotate, realizing the rotation of the first rolling die 11, which is convenient for the first rolling die 11 and the second rolling die to extrude and process the wheel preform 5.

[0099] According to some embodiments of the present application, optionally, the rolling die includes a wedge-shaped processing head 111, and the shape of the wedge-shaped processing head 111 gradually increases from one end to the other end.

[0100] The specific structure of the wedge-shaped processing head 111 is as Figure 9As shown, the tip of the wedge-shaped processing head 111 first contacts the wheel preform 5, and then expands the material of the wheel preform 5 outward. The wedge-shaped processing head 111 is fed step by step. First, it processes a certain depth, and then feeds slowly to extrude the specified double wheel rims.

[0101] The processing principle of the wedge-shaped processing head 111 is similar to that of cross wedge rolling. Cross wedge rolling is a new steel rolling technology that emerged in 1961 and is suitable for rolling revolving bodies with variable cross-sections. Two rolling mills with wedge-shaped grooves rotate in the same direction along the direction of the wedge's advancement, gradually rolling the billet into a revolving body with a variable cross-section. The wedge-shaped groove consists of three sections: wedging, forming, and finishing. A cutting tool is installed after the finishing section. For each rotation of the rolling mill, one or a pair of parts can be rolled. Cross wedge rolling is generally used for processing shafts (the shafts are relatively thin). In this embodiment, cross wedge rolling is applied to the processing of double-wheel-rim wheels. The diameter of the double-wheel-rim wheels is large, and the fixing method of the double-wheel-rim wheels is completely different from that of the shaft. When processing the shaft, the shaft cannot be fixed with a pressing oil cylinder, which is likely to damage the shaft; while in this embodiment, the double-wheel-rim wheels can be pressed by using a pressing oil cylinder. The double-wheel-rim wheels have a large diameter and are not easily damaged by pressing.

[0102] In this way, through the wedge-shaped processing head 111, the smaller end first contacts the wheel preform 5, and then slowly squeezes the wheel preform 5 to expand the processing range. The squeezing process is continuously repeated, and finally, upper and lower double wheel rims are formed.

[0103] According to some embodiments of the present application, optionally, the third driving unit drives the first wedge-shaped rolling mill 1 and the second wedge-shaped rolling mill 2 to approach the forging along the horizontal direction respectively, and the first wedge-shaped rolling mill 1 and the second wedge-shaped rolling mill 2 approach or move away from the forging simultaneously.

[0104] In this way, through the third driving unit, the first wedge-shaped rolling mill 1 and the second wedge-shaped rolling mill 2 approach or move away from the wheel preform 5 along the horizontal direction simultaneously, realizing automated processing, avoiding the situation where the first wedge-shaped rolling mill 1 approaches or moves away from the wheel preform 5 unilaterally, causing the entire pressing die 4 to be stressed unilaterally and reducing the service life of the bearing.

[0105] This embodiment also relates to a forming device for double-wheel-rim wheels. The forming device includes a first wedge-shaped rolling mill 1, a second wedge-shaped rolling mill 2, a support die 3, a pressing die 4, a first driving unit, a second driving unit, and a third driving unit;

[0106] The support die 3 is used to place the forging, and the first driving unit is used to drive the pressing die 4 to approach or move away from the support die 3 to press the forging. The pressing die 4, the forging, and the support die 3 can rotate synchronously around the vertical direction;

[0107] The first wedge-shaped roll 1 includes a first rolling die 11, the second wedge-shaped roll 2 includes a second rolling die, a second driving unit is used to drive the first rolling die 11 and the second rolling die to rotate around the vertical direction, and the first rolling die 11 and the second rolling die rotate in the same rotation direction;

[0108] A third driving unit is used to drive the first wedge-shaped roll 1 and the second wedge-shaped roll 2 to approach or move away from the forging, so that the first wedge-shaped roll 1 and the second wedge-shaped roll 2 perform rolling forming on the forging.

[0109] The forming device of a double-flange wheel in this embodiment is mainly used to implement the above-mentioned forming method.

[0110] Different from the prior art, for the forming device of the double-flange wheel of the technical solution of the present application, the cooperation of the first wedge-shaped roll 1, the second wedge-shaped roll 2, the support die 3, and the pressing die 4 can utilize the temperature of the forging. After the final forging, the forging is placed in the rolling mill, and is simultaneously extruded inward by two wedge-shaped rolls on the left and right sides. The two wedge-shaped rolls rotate actively, driving the pressing die 4, the forging, and the support die 3 to rotate passively, so as to process the annular upper and lower double flanges on the forging. Its processing process is short, the material utilization rate is high, the production efficiency is high, the energy consumption is low, and the cost is saved; the first driving unit, the second driving unit, and the third driving unit effectively improve the degree of automation.

[0111] According to some embodiments of the present application, optionally, the forming device further includes a manipulator for picking and placing the forging.

[0112] In this embodiment, the manipulator takes out the heated forging in the forging press and places it in the rolling mill. After the processing is completed, the manipulator takes out the processed double-flange wheel and places it in the designated area.

[0113] In this way, a manipulator for picking and placing the forging can be arranged between the final forging equipment and the forming device of the forging, realizing seamless connection between the final forging equipment and the forming device, and avoiding safety problems caused by manual operation.

[0114] Those skilled in the art should understand that the above embodiments can be provided as methods, apparatuses, or computer program products. These embodiments can take the form of all hardware embodiments, all software embodiments, or embodiments combining software and hardware aspects. All or part of the steps in the methods related to the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a storage medium readable by a computer device for executing all or part of the steps described in the methods of the above embodiments. The computer device includes, but is not limited to: personal computers, servers, general-purpose computers, special-purpose computers, network devices, embedded devices, programmable devices, intelligent mobile terminals, smart home devices, wearable intelligent devices, in-vehicle intelligent devices, etc.; the storage medium includes, but is not limited to: RAM, ROM, magnetic disks, magnetic tapes, optical discs, flash memories, USB flash drives, mobile hard disks, memory cards, memory sticks, network server storage, network cloud storage, etc.

[0115] It should be noted that although the above embodiments have been described in this article, this does not limit the patent protection scope of the present invention. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described in this article, or equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A method for forming a double-rim wheel, characterized in that: The method comprises: Unloading of raw materials and heating of raw materials; The heated raw materials are sent to a forging press for pre-forging and final forging to form a wheel preform; Keep the forging temperature, place the forged forging on the supporting die, and press the forging downward with the pressing die. The pressing die, forging and supporting die form a pressing module, which can rotate synchronously around the vertical direction. The first wedge roller and the second wedge roller are respectively located on the left and right sides of the forging. The first wedge roller and the second wedge roller rotate in the vertical direction respectively. The first wedge roller and the second wedge roller squeeze the forging from the horizontal direction respectively to roll the forging. The pressing module rotates passively to realize the processing of the upper and lower double rims on the forging. After rolling is completed, the first wedge roller and the second wedge roller are reset, the pressing die is facing upward, and the finished wheel is taken out.

2. The forming method of a double-rim wheel according to claim 1, characterized in that: The top structure of the supporting die cooperates with the lower structure of the wheel preform, and the bottom structure of the pressing die cooperates with the upper structure of the wheel preform. When the pressing die presses the forging onto the pressing die downward, the wheel preform is fixed, and the pressing die, forging and supporting die rotate synchronously.

3. The forming method of a double-rim wheel according to claim 2, characterized in that: The support mold is arranged on the lower passive shaft and is fixedly connected to the lower passive shaft, and the lower passive shaft can rotate axially through the bearing; The pressing die is arranged at the bottom of the upper passive shaft and is fixedly connected to the upper passive shaft. The upper passive shaft can rotate axially through a bearing.

4. The forming method of a double-rim wheel according to claim 3, characterized in that: The pressing die presses the forging downwards through a first driving unit, and the first driving unit is a pressing oil cylinder.

5. The forming method of a double-rim wheel according to claim 1, characterized in that: The first wedge-shaped roller and the second wedge-shaped roller rotate clockwise or counterclockwise at the same preset speed.

6. The forming method of a double-rim wheel according to claim 5, characterized in that: The first wedge roller includes a first rolling die, a base, a first driving shaft and a first passive shaft. The first driving shaft and the first passive shaft are respectively located at the upper and lower ends of the first rolling die and are respectively fixedly connected to the first rolling die. The first driving shaft and the first passive shaft are respectively fixed to the rolling die through bearings. The second driving unit drives the first driving shaft to rotate, thereby driving the first rolling die and the first passive shaft to rotate synchronously. The structure of the second wedge-shaped roller is the same as that of the first wedge-shaped roller, and the second wedge-shaped roller is symmetrically arranged with respect to the first wedge-shaped roller.

7. The forming method of a double-rim wheel according to claim 6, characterized in that: The rolling die includes a wedge-shaped processing head, the shape of which gradually increases from one end to the other end.

8. The method for forming a double-rim wheel according to claim 7, wherein: The third driving unit drives the first wedge roller and the second wedge roller to approach the forging along the horizontal direction respectively, and the first wedge roller and the second wedge roller approach or move away from the forging at the same time.

9. A forming device for a double-rim wheel, characterized in that: The forming device includes a first wedge roller, a second wedge roller, a supporting die, a pressing die, a first driving unit, a second driving unit and a third driving unit; The supporting die is used to place the forging, and the first driving unit is used to drive the pressing die to move closer to or away from the supporting die to press the forging, and the pressing die, the forging and the supporting die can rotate synchronously around the vertical direction; The first wedge roller includes a first rolling die, the second wedge roller includes a second rolling die, the second driving unit is used to drive the first rolling die and the second rolling die to rotate around a vertical direction, and the first rolling die and the second rolling die rotate around the same rotation direction; The third driving unit is used to drive the first wedge roller and the second wedge roller to approach or move away from the forging, so that the first wedge roller and the second wedge roller roll the forging to form the forging.

10. The double-rim wheel forming device according to claim 9, characterized in that: The forming device also includes a robot for taking and placing the forgings.

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