Cast-aluminum rotor riveting ring stamping device and method

Abstract

The invention discloses a cast-aluminum rotor riveting ring stamping device and method, and relates to the technical field of mechanical engineering. A riveting ring is used for being connected between a rotor and a rotor balance plate; comprising a base; the first stamping mechanism comprises an upper die assembly and a lower die assembly which are connected to the machine base. The upper die assembly comprises a step-shaped first punch, and a blank can be placed on the lower die assembly. The first punch can move downwards to carry out first-stage punching on the blank piece to form a punching piece; the second stamping mechanism comprises an upper pressing assembly connected to the machine base; the upper pressing assembly comprises a stepped second punch, and the second punch can move downwards relatively to perform second-stage stamping on the stamping part to form a riveting ring; at least two times of punching can be replaced by one-time punching, so that the punching procedures are obviously reduced; the contact friction between the plate and a blank can be increased, the temperature of the plate can be increased through the contact friction, and the plate can be machined more easily.

Description

Technical Field

[0001] The present application belongs to the field of mechanical engineering technology, and specifically relates to a device and method for stamping a riveting ring of a cast aluminum rotor. Background Art

[0002] The rivet ring is used to connect the balance plate and the cast aluminum rotor, and fix the balance plate to the end of the rotor by riveting. Due to the structural characteristics of the rivet ring, the end material is thicker, while the stretched part is thinner. The thickness of the stretched part is less than 1 / 3 of the end, so the thickness difference between the two ends of the rivet ring is too large.

[0003] If cold stamping is used, the punch needs to be stamped multiple times continuously, resulting in too many stamping processes and too long production lines. Therefore, the preparation of riveted rings mostly adopts heat treatment or lathe processing to process the two ends of the riveted ring separately, and then the two ends of the riveted ring are connected and formed by welding or riveting; so this structure and processing method result in low structural strength of the riveted ring, resulting in long processing time and high cost. Summary of the invention

[0004] The present application provides a device and method for stamping a cast aluminum rotor riveting ring to solve the above-mentioned technical problems that cold stamping requires the punch to stamp multiple times continuously, too many stamping processes cause the production line to be too long, and heat treatment or turning is used to process the two ends of the riveting ring separately and then weld them together to form, resulting in low strength of the riveting ring.

[0005] The technical solution adopted in this application is:

[0006] A casting aluminum rotor riveting ring punching device, the riveting ring is used to connect between the rotor and the rotor balance plate; comprising:

[0007] Machine base;

[0008] The first stamping mechanism comprises an upper die assembly and a lower die assembly connected to the machine base; the upper die assembly comprises a stepped first punch, and the lower die assembly can place a blank; the first punch can move downward to perform a first-stage stamping on the blank to form a stamped part;

[0009] The second stamping mechanism includes an upper pressing assembly connected to the machine base; the upper pressing assembly includes a stepped second punch, and the second punch can move downward relatively to perform a second stage of stamping on the stamping part to form a riveting ring.

[0010] The cast aluminum rotor riveting ring punching device of the present application also has the following additional technical features:

[0011] The first punch includes a positioning section, a stamping section and a connecting section which are connected in sequence in a stepped manner; the positioning section is used to sleeve the blank, and the stamping section includes at least a first stamping section and a second stamping section, the first stamping section is connected to the positioning section, and the second stamping section is connected to the connecting section; the outer peripheries of the first stamping section and the second stamping section are formed with a conical stamping surface.

[0012] The upper mold assembly includes a positioning plate, a guide plate and a first punch; the positioning plate is connected to the machine base, the guide plate is connected to the positioning plate through a guide column, one end of the connecting section is connected to the guide plate, the positioning plate is connected to a driving mechanism, and the driving mechanism is connected to the connecting section.

[0013] The second punch includes a first punching section, a second punching section and a third punching section which are connected in sequence in a stepped manner; the first punching section includes a punching and expanding section one and a punching and expanding section two which are connected; a conical stamping surface is formed on the outer periphery of the punching and expanding section one and the punching and expanding section two, and the punching and expanding section two is connected to the second punching section.

[0014] The upper pressing assembly includes a fixed plate, a movable plate and a second punch; the fixed plate is connected to the machine base, the movable plate is connected to the fixed plate through a guide column, one end of the third punching section is connected to the movable plate, the fixed plate is connected to a driving device, and the driving device is connected to the third punching section.

[0015] The cast aluminum rotor riveting ring stamping device also includes a lower pressing assembly, which is used to place the stamping part; the upper mold assembly and the upper pressing assembly are respectively arranged on both sides of the machine base at intervals, and the lower mold assembly is correspondingly arranged below the upper mold assembly, and the lower pressing assembly is correspondingly arranged below the upper pressing assembly; or, an adjusting disk is movably connected in the machine base, and the upper mold assembly and the upper pressing assembly are respectively connected to the adjusting disk, and the lower mold assembly is arranged on the machine base below the upper mold assembly or the upper pressing assembly; the upper mold assembly and the upper pressing assembly can move under the driving action of the adjusting disk to face the lower mold assembly below.

[0016] The lower die assembly comprises a stamping plate, and the stamping plate is provided with a first positioning hole for positioning the blank; the lower pressing assembly comprises a pressing plate, and the pressing plate is provided with a second positioning hole for positioning the stamping part.

[0017] The present application also relates to a method for stamping a cast aluminum rotor riveting ring, which specifically includes:

[0018] The annular blank is mounted on the positioning section of the first punch;

[0019] The first punch is driven downward by the driving mechanism to position the blank in the first positioning hole of the punching plate of the lower die assembly, and a stepped stamping part is formed by the first punch;

[0020] Install the stamping part in the second positioning hole of the pressing plate of the lower pressing assembly;

[0021] The second punch is driven downward by the driving mechanism to punch downward, so that the size of the inner ring formed by the punching part reaches the riveting ring of a preset threshold.

[0022] The first punch punches downward so that the blank is positioned in the first positioning hole of the lower mold assembly, and then the first punch is driven downward by the driving mechanism to punch the blank multiple times, specifically including: firstly, the blank is punched by the punching section of the first punch so that the bottom of the annular blank is stretched downward to form a stepped blank; then, the blank is continuously punched by the connecting section of the first punch so that the blank forms a stepped stamping part with a thickness at the lower end greater than that at the upper end.

[0023] The second punch punches the stamping part located in the pressing plate downward for multiple times continuously, specifically including: first, punching the stamping part through the punching and expanding section 1 of the first punching section of the second punch; second, punching the stamping part through the punching and expanding section 2 of the first punching section of the second punch; then, punching the stamping part through the second punching section of the second punch; then, punching the stamping part through the third punching section of the second punch, and the stamping is stopped when the inner ring size of the stamping part reaches a preset threshold.

[0024] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0025] 1. A cast aluminum rotor riveting ring punching device of the present application, wherein the riveting ring is used to connect the rotor balance plate to the end of the rotor, and plays a connecting role between the rotor and the rotor balance plate; the riveting ring punching device comprises a machine base, a first punching mechanism and a second punching mechanism; wherein the first punching mechanism comprises an upper die assembly and a lower die assembly connected to the machine base; the upper die assembly comprises a stepped first punch, and the lower die assembly can place a blank; the first punch can move downward to perform a first-stage punching on the blank to form a stamped part; since the first punch has a stepped structure, it can achieve one-time punching instead of at least two punchings, and the stepped stamping can significantly reduce the stamping process; and during the stamping process, due to the different cross-sections of the stepped structure, the contact friction between the blank and the stamping part can be increased, and this friction extrusion will increase the temperature of the sheet material, making the sheet material easier to process; the first punch is used to impact the annular blank for initial Step forming is performed to form a stamping part with a stepped shaft structure, and then the stamping part is stamped by a second stamping mechanism. The second punch in the second stamping mechanism also has a stepped structure, which can replace at least two stampings with one stamping. The production line is greatly reduced, and the processing time is reduced. The stepped stamping can further reduce the stamping process, so that the stamping part can be quickly stretched under the action of the second punch of the stepped structure, so that one end of the stamping part is stretched and thinned, and the thickness of the stretched and thinned end is less than the thickness of the other end, until the size reaches the set threshold to realize the forming of the riveted ring, thereby enhancing the overall structural strength; therefore, the present application can avoid the problem of low connection strength of the riveted ring after welding or riveting forming caused by the traditional method of not selecting cold stamping but using lathe processing, and there is no need to worry about the problem that in traditional cold stamping, the punch needs to be repeatedly stamped uninterruptedly, and the entire process production line is very long, resulting in long processing time and high production cost.

[0026] 2. As a preferred embodiment of the present application, the first punch includes a positioning section, a stamping section and a connecting section which are connected in sequence in a stepped manner; the positioning section is used to socket the blank, the stamping section includes at least a first stamping section and a second stamping section, the first stamping section is connected to the positioning section, and the second stamping section is connected to the connecting section; a conical stamping surface is formed on the periphery of the first stamping section and the second stamping section.

[0027] The positioning section is located at the bottom of the first punch and is used to fit the annular blank to achieve preliminary positioning of the blank. The outer diameter of the positioning section needs to be compatible with the inner diameter of the blank to achieve a socket connection of the blank. The stamping section includes at least two layers of a first stamping section and a second stamping section with a stepped structure, and the first stamping section and the second stamping section both have a conical stamping surface so that they can expand the inner hole of the blank step by step, replacing two stampings with one stamping, reducing the stamping process, and stamping the inner hole step by step to reduce the wear of the blank, and make the radial and axial dimensions more uniform, thereby improving the structural strength of the entire riveting ring.

[0028] 3. As a preferred embodiment of the present application, the upper mold assembly includes a positioning plate, a guide plate and a first punch; the positioning plate is connected to the machine base, the guide plate is connected to the positioning plate through a guide column, one end of the connecting section is connected to the guide plate, the positioning plate is connected to a driving mechanism, and the driving mechanism is connected to the connecting section.

[0029] The driving mechanism drives the connecting section to move linearly in the vertical direction, and drives the guide plate to move up and down along the guide column relative to the positioning plate. When the blank needs to be stamped, the connecting section is driven downward by the driving mechanism, so that the guide plate moves downward with the connecting section. The guide plate can position the blank, and the blank is stamped by the positioning section and the stamping section of the first punch, so that the annular blank is formed into a stepped shaft-shaped stamping part.

[0030] 4. As a preferred embodiment of the present application, the second punch includes a first punching section, a second punching section and a third punching section which are connected in sequence in a stepped manner; the first punching section includes a punching expansion section one and a punching expansion section two which are connected; a conical stamping surface is formed on the periphery of the punching expansion section one and the punching expansion section two, and the punching expansion section two is connected to the second punching section.

[0031] The first punching section is located at the bottom of the second punch, and the first punching section includes at least two punching and expanding sections one and two with stepped structures, so as to realize the graded stamping of the stamped parts. Since the punching and expanding sections one and two have tapered stamping surfaces, the stamped parts can be stamped step by step from the punching and expanding sections one to the punching and expanding sections two, so that the inner diameter of the stamped parts is continuously and evenly expanded, thereby realizing uniform stamping of the stamped parts, reducing wear and stamping processes, and reducing processing time.

[0032] 5. As a preferred embodiment of the present application, the upper pressing assembly includes a fixed plate, a movable plate and a second punch; the fixed plate is connected to the machine base, the movable plate is connected to the fixed plate through a guide column, one end of the third punching section is connected to the movable plate, the fixed plate is connected to a driving mechanism, and the driving mechanism is connected to the third punching section.

[0033] The driving mechanism can drive the third punching section to move linearly in the vertical direction. Since the third punching section is connected to the movable plate, when the stamping part needs to be stamped, the third punching section is driven downward by the driving mechanism, thereby driving the movable plate to move downward along the guide column relative to the fixed plate. The movable plate can position the stamping part. The first punching section and the second punching section of the second punch respectively stamp the stamping part step by step, so that the inner diameter size of the stamping part is uniformly and gradually expanded. One punching can replace the traditional secondary punching, which reduces the frequency of use of the punch and the duration of the entire production process and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0035] Figure 1 This is a schematic structural diagram of a cast aluminum rotor riveting ring stamping device according to an implementation mode of the present application;

[0036] Figure 2 This is a schematic diagram of the first punch structure of a cast aluminum rotor riveting ring punching device according to an embodiment of the present application;

[0037] Figure 3 This is a schematic diagram of the second punch structure of a cast aluminum rotor riveting ring punching device according to an embodiment of the present application;

[0038] Figure 4 This is a schematic structural diagram of a blank of a cast aluminum rotor riveting ring punching device according to an embodiment of the present application;

[0039] Figure 5 This is a schematic structural diagram of a stamping part of a cast aluminum rotor riveting ring stamping device according to an embodiment of the present application;

[0040] In the figure,

[0041] 1. Machine base; 2. First punching mechanism; 3. Second punching mechanism; 4. Upper die assembly; 41. Positioning plate; 42. Guide plate; 43. First punch; 431. Positioning section; 432. Punching section; 4321. First punching section; 4322. Second punching section; 433. Connecting section; 4331. First connecting section; 4332. Second connecting section; 5. Upper pressing assembly; 51. Fixed plate; 52. Moving plate; 53. Second punch; 531, first punching section; 5311, punching and expanding section one; 5312, punching and expanding section two; 532, second punching section; 533, third punching section; 6, blank; 7, stamping part; 8, transition spherical surface; 9, first guide transition surface; 10, second guide transition surface; 11, third guide transition surface; 12, fourth guide transition surface; 13, first stamping transition surface; 14, second stamping transition surface; 15, stamping plate; 16, pressing plate. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0044] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0047] Example 1

[0048] The present application relates to a cast aluminum rotor riveting ring punching device, such as Figure 1-Figure 5 As shown, the riveting ring is used to connect between the rotor and the rotor balancing plate; it includes:

[0049] Base 1;

[0050] The first stamping mechanism 2 includes an upper die assembly 4 and a lower die assembly connected to the machine base 1; the upper die assembly 4 includes a stepped first punch 43, and the lower die assembly can place a blank 6; the first punch 43 can move downward to perform a first-stage stamping on the blank 6 to form a stamped part 7;

[0051] The second stamping mechanism 3 includes an upper pressing assembly 5 connected to the machine base 1; the upper pressing assembly 5 includes a stepped second punch 53, and the second punch 53 can move downward relatively to perform a second stage of stamping on the stamping part 7 to form a riveting ring.

[0052] Since the first punch 43 has a stepped structure, it can replace at least two stampings with one stamping, and the stepped stamping can significantly reduce the stamping process; and in the stamping process, due to the different cross-sections of the stepped structure, the contact friction between the blank 6 and the blank 6 can be increased. This friction extrusion will increase the temperature of the sheet material and make it easier to process the sheet material; the first punch 43 impacts the annular blank 6 for preliminary forming to form a stamping part 7 with a stepped shaft structure, and then the stamping part 7 is stamped by the second stamping mechanism 3. The second punch 53 in the second stamping mechanism 3 also has a stepped structure, which can replace at least two stampings with one stamping. Ladder stamping can further reduce the stamping process, so that the stamping part 7 can be quickly stretched under the action of the second punch 53 of the stepped structure, so that one end of the stamping part 7 is stretched and thinned, and the thickness of the stretched and thinned end is smaller than the thickness of the other end, until the size reaches the set threshold to realize the forming of the riveted ring; therefore, the present application can avoid the problem of low connection strength of the riveted ring after welding or riveting forming caused by the traditional method of not selecting cold stamping but using turning, and there is no need to worry about the traditional cold stamping because the punch needs to be repeatedly stamped uninterruptedly, the entire process production line is very long, resulting in long processing time and high production cost.

[0053] Furthermore, the first punch 43 includes a positioning section 431, a stamping section 432 and a connecting section 433 which are connected in sequence in a stepped manner; the positioning section 431 is used to socket the blank 6, and the stamping section 432 includes at least a first stamping section 4321 and a second stamping section 4322, the first stamping section 4321 is connected to the positioning section 431, and the second stamping section 4322 is connected to the connecting section 433; a conical stamping surface is formed on the periphery of the first stamping section 4321 and the second stamping section 4322.

[0054] The positioning section 431 is located at the bottom of the first punch 43 and is used to fit the annular blank 6 to achieve preliminary positioning of the blank 6. The outer diameter of the positioning section 431 needs to be compatible with the inner diameter of the blank 6 to achieve the socket connection of the blank 6. The stamping section 432 includes at least two layers of a first stamping section 4321 and a second stamping section 4322 with a stepped structure, and the first stamping section 4321 and the second stamping section 4322 both have a conical stamping surface so that they can expand the inner hole of the blank 6 step by step, realizing one stamping instead of two stampings, reducing the stamping process, and stamping the inner hole step by step so that the wear of the blank 6 is reduced, and the radial and axial dimensions are more uniform, thereby improving the structural strength of the entire riveting ring.

[0055] A transition spherical surface 8 is formed at the bottom of the positioning section 431, and the transition spherical surface 8 ensures that the first punch can be withdrawn smoothly without taking material with it; there is an arc-shaped first guide transition surface 9 between the positioning section 431 and the first punching section 4321; there is an arc-shaped second guide transition surface 10 between the first punching section 4321 and the second punching section 4322, and there is an arc-shaped third guide transition surface 11 between the second punching section 4322 and the connecting section 433.

[0056] The connecting section 433 includes a first connecting section 4331 and a second connecting section 4332 which are cylindrical. The first connecting section 4331 is connected to the second stamping section 4322. One end of the second connecting section 4332 can extend into and be connected to the guide plate 42. An arc-shaped fourth guide transition surface 12 is provided between the first connecting section 4331 and the second connecting section 4332.

[0057] As a preferred embodiment, the upper mold assembly 4 includes a positioning plate 41, a guide plate 42 and a first punch 43; the positioning plate 41 is connected to the machine base 1, the guide plate 42 is connected to the positioning plate 41 through a guide column, one end of the connecting section 433 is connected to the guide plate 42, the positioning plate 41 is connected to a driving mechanism, and the driving mechanism is connected to the connecting section 433.

[0058] The driving mechanism drives the connecting section 433 to move linearly in the vertical direction, and drives the guide plate 42 to move up and down along the guide column relative to the positioning plate 41. When the blank 6 needs to be stamped, the connecting section 433 is driven downward by the driving mechanism, so that the guide plate 42 moves downward with the connecting section 433. The guide plate 42 can position the blank 6, and the blank 6 is stamped by the positioning section 431 and the stamping section 432 of the first punch 43, so that the annular blank 6 is formed into a stepped shaft-shaped stamping part 7.

[0059] As a preferred embodiment, the second punch 53 includes a first punching section 531, a second punching section 532 and a third punching section 533 which are connected in sequence in a stepped manner; the first punching section 531 includes a punching expansion section 1 5311 and a punching expansion section 2 5312 which are connected to each other; a conical stamping surface is formed on the periphery of the punching expansion section 1 5311 and the punching expansion section 2 5312, and the punching expansion section 2 5312 is connected to the second punching section 532.

[0060] The first punching section 531 is located at the bottom of the second punch 53. The first punching section 531 includes at least two stepped structures, namely, the punching expansion section 1 5311 and the punching expansion section 2 5312, to realize the graded stamping of the stamping part 7. Since the punching expansion section 1 5311 and the punching expansion section 2 5312 both have a tapered stamping surface, the stamping part 7 can be stamped step by step from the punching expansion section 1 5311 to the punching expansion section 2 5312, so that the inner diameter of the stamping part 7 is continuously and evenly expanded, thereby realizing uniform stamping of the stamping part 7, reducing wear and stamping process, and reducing processing time.

[0061] In addition, it should be noted that an arc-shaped first stamping transition surface 13 is provided between the punching and expanding section 1 5311 and the punching and expanding section 2 5312 ; an arc-shaped second stamping transition surface 14 is formed between the punching and expanding section 2 5312 and the second punching section 532 ; and one end of the third punching section 533 extends into and is connected to the movable plate 52 .

[0062] As a preferred embodiment, the upper pressing assembly 5 includes a fixed plate 51, a movable plate 52 and a second punch 53; the fixed plate 51 is connected to the machine base 1, the movable plate 52 is connected to the fixed plate 51 through a guide column, one end of the third punching section 533 is connected to the movable plate 52, the fixed plate 51 is connected to a driving device, and the driving device is connected to the third punching section 533.

[0063] The driving device can drive the third punching section 533 to move linearly in the vertical direction. Since the third punching section 533 is connected to the movable plate 52, when the stamping part 7 needs to be stamped, the third punching section 533 is driven to move downward by the driving device, thereby driving the movable plate 52 to move downward along the guide column relative to the fixed plate 51. The movable plate 52 can position the stamping part 7. The first punching section 531 and the second punching section 532 of the second punch 53 respectively stamp the stamping part 7 step by step, so that the inner diameter of the stamping part 7 is uniformly and gradually expanded. One stamping can replace the traditional secondary stamping, which reduces the frequency of use of the punch and the duration of the entire production process, and improves production efficiency.

[0064] The arrangement of the first punching mechanism 2 and the second punching mechanism 3 in the present application is not limited by the present application, and any of the following embodiments may be adopted:

[0065] Embodiment 1: The cast aluminum rotor riveting ring stamping device also includes a lower pressing assembly, which is used to place the stamping part 7; the upper mold assembly 4 and the upper pressing assembly 5 are respectively arranged on both sides of the machine base 1 at intervals, and the lower mold assembly is correspondingly arranged below the upper mold assembly 4, and the lower pressing assembly is correspondingly arranged below the upper pressing assembly 5.

[0066] In the present embodiment, the first stamping mechanism 2 and the second stamping mechanism 3 are arranged on both sides of the same horizontal line, and the entire machine base 1 is a rectangular structure, one end of which is provided with the first stamping mechanism 2, the machine base 1 has a top seat and a base, the top seat and the base are connected by a connecting column, an upper mold assembly 4 is arranged at the bottom of the top seat above the machine base 1, and a lower mold assembly corresponding to the upper mold assembly 4 is arranged at the top of the base of the machine base 1; the second stamping mechanism 3 is arranged at the other end, the bottom of the top seat is connected with an upper pressing assembly 5, and the top of the base is connected with a lower pressing assembly corresponding to the upper pressing assembly 5; the stamping part 7 after the first stage of stamping in the upper mold assembly 4 and the lower mold assembly is placed in the lower pressing assembly, and the second stage of stamping of the stamping part 7 is achieved by the cooperation of the upper pressing assembly 5 and the lower pressing assembly to finally obtain a formed riveted ring.

[0067] Embodiment 2: An adjusting disk is movably connected inside the machine base 1, and an upper mold assembly 4 and an upper pressing assembly 5 are respectively connected to the adjusting disk. The lower mold assembly is arranged on the machine base 1 below the upper mold assembly 4 or the upper pressing assembly 5; the upper mold assembly 4 and the upper pressing assembly 5 can move under the driving action of the adjusting disk to face the lower mold assembly below.

[0068] In this embodiment, in order to reduce the layout of the site and reduce the overall volume occupied by the device, the upper mold assembly 4 and the upper pressing assembly 5 are integrated on the adjustment disk. The upper mold assembly 4 can be on one adjustment disk, and the upper pressing assembly 5 can be on another adjustment disk. Both adjustment disks can move relative to the machine base 1 along the track. A lower mold assembly is arranged below the machine base 1, and there is no need to arrange a lower pressing assembly. The upper mold assembly 4 and the upper pressing assembly 5 can cooperate with the lower mold assembly. When it is necessary to use the first punch 43 to punch the blank 6 During pressing, the blank 6 is placed in the lower mold assembly, and the adjusting plate connected to the upper mold assembly 4 is moved to the upper position opposite to the lower mold assembly. The first punch 43 is driven by the driving mechanism to press the blank 6 downward to complete the first stage of stamping. When the second punch 53 is needed to stamp the blank 6, there is no need to move the stamping part 7. It is only necessary to move the adjusting plate connected to the upper pressing assembly 5 to the top of the lower mold assembly, and drive the second punch 53 through the corresponding driving device to complete the stamping of the stamping part 7 to obtain a formed riveted ring.

[0069] As a preferred embodiment, the lower mold assembly includes a stamping plate 15 , which is provided with a first positioning hole for positioning the blank 6 ; the lower pressing assembly includes a pressing plate 16 , which is provided with a second positioning hole for positioning the stamping part 7 .

[0070] The purpose of the stamping plate 15 is to place the blank 6 so that the blank 6 can be aligned with the first punch 43 to achieve accurate positioning of the blank 6; the purpose of the pressing plate 16 is to place the stamped part 7 after being stamped by the first punch 43 so that the stamped part 7 can be accurately positioned for continued stamping by the second punch 53, thereby improving the stamping accuracy and ensuring the stamping quality.

[0071] In addition, the cast aluminum rotor riveting ring stamping device also includes a guide mechanism, which includes a first guide mechanism and a second guide mechanism. The first guide mechanism includes a first positioning member arranged on the guide plate 42 and a second positioning member arranged on the stamping plate 15, and the first positioning member and the second positioning member can be connected in a sleeve connection; the second guide mechanism includes a third positioning member arranged on the moving plate 52 and a fourth positioning member arranged on the pressing plate 16, and the third positioning member and the fourth positioning member can be connected in a sleeve connection. By setting the first positioning member and the second positioning member in coordination, the purpose is to further improve the positioning accuracy between the guide plate 42 and the stamping plate 15, to ensure that the position of the first punch 43 is facing the blank 6, and to improve the stamping quality; by setting the third positioning member and the fourth positioning member in coordination, the purpose is to further improve the positioning accuracy between the moving plate 52 and the pressing plate 16, to ensure that the position of the second punch 53 is facing the stamping part 7, thereby further improving the positioning accuracy of the stamping and improving the stamping quality.

[0072] For example, the first positioning member and the second positioning member can be sleeves, the third positioning member and the fourth positioning member can be cylindrical structures, the second positioning member is arranged directly below the first positioning member, and the fourth positioning member is arranged directly below the third positioning member. When the first positioning member moves downward following the guide plate 42, it can be sleeved outside the second positioning member, and when the third positioning member moves downward following the movable plate 52, it can be sleeved outside the fourth positioning member.

[0073] Example 2

[0074] The present application also relates to a method for stamping a cast aluminum rotor riveting ring, which specifically includes:

[0075] The annular blank 6 is mounted on the positioning section 431 of the first punch 43;

[0076] The first punch 43 is driven downward by the driving mechanism to position the blank 6 in the first positioning hole of the punching plate 15 of the lower die assembly, and a stepped punch 7 is formed by the first punch 43;

[0077] Install the stamping part 7 into the second positioning hole of the pressing plate 16 of the lower pressing assembly;

[0078] The second punch 53 is driven downward by the driving device to punch downward, so that the inner ring size formed by the punching part 7 reaches the riveting ring of the preset threshold value.

[0079] The blank 6 is a circular ring-shaped structure, which is previously processed in sequence on a lathe or other processing device, such as slicing, punching a center hole, stretching, blanking, and turning an end surface, to form a circular ring-shaped blank 6, the inner diameter of which must be compatible with the outer diameter of the positioning section 431, so that the blank 6 is first sleeved on the outer side of the positioning section 431 of the first punch 43, and then the first punch 43 drives the blank 6 to punch downward, and the blank 6 is installed on the stamping plate 1 of the lower die assembly under the punching of the first punch 43. In the first positioning hole 5, since the positioning section 431 and the punching section 432 of the first punch 43 are both in a stepped structure, and the punching section 432 includes a first punching section 4321 and a second punching section 4322, the outer periphery of the first punching section 4321 and the second punching section 4322 is formed with a tapered punching surface, it is possible to achieve one punching instead of at least two punchings, and to achieve step-by-step punching of the blank 6, and the inner diameter of the blank 6 is gradually and evenly expanded, thereby improving the quality and efficiency of the punching;

[0080] When the blank 6 is initially stamped in the first stage so that the blank 6 forms a stepped shaft structure, wherein the radial thickness of one end is greater than the radial thickness of the other end, a stamped part 7 is formed; the second stamping mechanism 3 continues to stamp the stamped part 7 to obtain a riveted ring. Specifically, when the lower pressing assembly is used, the stamped part 7 is placed in the second positioning hole of the pressing plate 16, or when the lower pressing assembly is not used, there is no need to move the stamped part 7, and the second punch 53 is driven by the driving mechanism to stamp the stamped part 7. Since the first punching section 531, the second punching section 532 and the third punching section 533 of the second punch 53 are in a stepped structure, the first punching section 531 It includes a punching and expanding section 5311 and a punching and expanding section 5312. The outer peripheries of the punching and expanding section 5311 and the punching and expanding section 5312 form a conical stamping surface, which can punch the stamping part 7 once instead of at least twice, so that the inner hole of the stamping part 7 is uniformly enlarged step by step, thereby reducing the stamping process and achieving uniform and rapid stamping of the stamping part 7, improving the stamping quality and efficiency. In addition, during the stamping process, the stepped second punch 53 can contact the inner wall of the stamping part 7 more, thereby increasing friction and extrusion. This friction and extrusion will further increase the temperature of the sheet material, making it easier to process the sheet material, and finally achieving a riveting ring with a thinner end and a thicker end;

[0081] In addition, since the first punch 43 and the second punch 53 have a stepped structure and the positioning section 431 of the first punch 43 forms a spherical transition surface 8 toward the bottom of the blank 6, it can ensure that the first punch 43 can be withdrawn smoothly without carrying any material.

[0082] As a preferred embodiment, the first punch 43 punches downward, so that the blank 6 is positioned in the first positioning hole of the lower die assembly, and then the first punch 43 needs to be driven downward by a driving mechanism to punch the blank 6 multiple times, specifically including:

[0083] First, the blank 6 is punched by the punching section 432 of the first punch 43, so that the bottom of the annular blank 6 is stretched downward to form a stepped blank 6; then, the blank 6 is further punched by the connecting section 433 of the first punch 43, so that the blank 6 forms a stepped stamping part 7 with a lower end thickness greater than an upper end thickness.

[0084] As a preferred embodiment, the second punch 53 is driven downward by a driving device to make the inner ring size of the punching part 7 reach a preset threshold value of the riveting ring, which specifically includes:

[0085] First, the stamping part 7 is stamped by the punching and expanding section 1 5311 of the first punching section 531 of the second punch 53; secondly, the stamping part 7 is stamped by the punching and expanding section 2 5312 of the first punching section 531 of the second punch 53; then, the stamping part 7 is stamped by the second punching section 532 of the second punch 53; then, the stamping part 7 is stamped by the third punching section 533 of the second punch 53, and the stamping is stopped when the inner ring size of the stamping part 7 reaches a preset threshold.

[0086] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0087] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0088] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A casting aluminum rotor riveting ring punching device, the riveting ring is used to connect between the rotor and the rotor balance plate; characterized in that: include: Machine base; The first stamping mechanism comprises an upper die assembly and a lower die assembly connected to the machine base; the upper die assembly comprises a stepped first punch, and the lower die assembly can place a blank; the first punch can move downward to perform a first-stage stamping on the blank to form a stamped part; The second stamping mechanism includes an upper pressing assembly connected to the machine base; the upper pressing assembly includes a stepped second punch, and the second punch can move downward relatively to perform a second stage of stamping on the stamping part to form a riveting ring.

2. A cast aluminum rotor riveting ring punching device as claimed in claim 1, characterized in that: The first punch includes a positioning section, a stamping section and a connecting section which are connected in sequence in a stepped manner; the positioning section is used to sleeve the blank, and the stamping section includes at least a first stamping section and a second stamping section, the first stamping section is connected to the positioning section, and the second stamping section is connected to the connecting section; the outer peripheries of the first stamping section and the second stamping section are formed with a conical stamping surface.

3. A cast aluminum rotor riveting ring punching device as claimed in claim 2, characterized in that: The upper mold assembly includes a positioning plate, a guide plate and a first punch; the positioning plate is connected to the machine base, the guide plate is connected to the positioning plate through a guide column, one end of the connecting section is connected to the guide plate, the positioning plate is connected to a driving mechanism, and the driving mechanism is connected to the connecting section.

4. A cast aluminum rotor riveting ring punching device as claimed in claim 1, characterized in that: The second punch includes a first punching section, a second punching section and a third punching section which are connected in sequence in a stepped manner; the first punching section includes a punching and expanding section one and a punching and expanding section two which are connected; a conical stamping surface is formed on the outer periphery of the punching and expanding section one and the punching and expanding section two, and the punching and expanding section two is connected to the second punching section.

5. A cast aluminum rotor riveting ring punching device as claimed in claim 4, characterized in that: The upper pressing assembly includes a fixed plate, a movable plate and a second punch; the fixed plate is connected to the machine base, the movable plate is connected to the fixed plate through a guide column, one end of the third punching section is connected to the movable plate, the fixed plate is connected to a driving device, and the driving device is connected to the third punching section.

6. A cast aluminum rotor riveting ring punching device as claimed in claim 1, characterized in that: It also includes a lower pressing assembly, which is used to place the stamping part; the upper mold assembly and the upper pressing assembly are respectively arranged at two sides of the machine base, the lower mold assembly is correspondingly arranged below the upper mold assembly, and the lower pressing assembly is correspondingly arranged below the upper pressing assembly; or, An adjustment disk is movably connected inside the machine base, and an upper mold assembly and an upper pressing assembly are respectively connected to the adjustment disk. A lower mold assembly is arranged on the machine base below the upper mold assembly or the upper pressing assembly; the upper mold assembly and the upper pressing assembly can move under the driving action of the adjustment disk to face the lower mold assembly below.

7. A cast aluminum rotor riveting ring punching device as claimed in claim 6, characterized in that: The lower die assembly comprises a stamping plate, and the stamping plate is provided with a first positioning hole for positioning the blank; the lower pressing assembly comprises a pressing plate, and the pressing plate is provided with a second positioning hole for positioning the stamping part.

8. A method for stamping a cast aluminum rotor riveting ring, characterized in that: Specifically include: The annular blank is mounted on the positioning section of the first punch; The first punch is driven downward by the driving mechanism to position the blank in the first positioning hole of the punching plate of the lower die assembly, and a stepped stamping part is formed by the first punch; Install the stamping part in the second positioning hole of the pressing plate of the lower pressing assembly; The second punch is driven downward by the driving mechanism to punch downward, so that the size of the inner ring formed by the punching part reaches the riveting ring of a preset threshold.

9. A method for punching a cast aluminum rotor riveting ring as claimed in claim 8, characterized in that: The first punch is punched downward so that the blank is positioned in the first positioning hole of the lower die assembly, and then the first punch is driven downward by a driving mechanism to punch the blank multiple times, specifically including: First, the blank is punched by the punching section of the first punch, so that the bottom of the annular blank is stretched downward to form a stepped blank; Then, the blank is further punched through the connecting section of the first punch, so that the blank is formed into a stepped punched part with a lower end having a thickness greater than an upper end.

10. A method for punching a cast aluminum rotor riveting ring as claimed in claim 8, characterized in that: The second punch punches downwardly and continuously for multiple times the stamping part located in the pressing plate, specifically including: Firstly, the punching part is punched by the punching and expanding section of the first punching section of the second punch; Secondly, the punching part is punched by the punching and expanding section 2 of the first punching section of the second punch; Then the stamping part is punched by a second punching section of a second punch; Then, the stamping part is punched by the third punching section of the second punch, and the punching is stopped when the inner ring size of the stamping part reaches a preset threshold.

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