Riveting press for iron core forming

Abstract

The invention discloses a riveting press for iron core forming, which comprises an equipment main body, a material placing table and an operation table, and the operation table is provided with a lower riveting seat, a riveting station, a positioning carrier, an upper riveting seat, a riveting convex die, a side clamping block and a pushing block. Compared with the prior art, the iron core lateral positioning and clamping device has the following advantages and effects that the clamping pieces on the two sides are automatically driven to synchronously move inwards through downward pressing movement of the riveting seat on the upper portion, timely and stable lateral positioning and clamping of an iron core to be machined are achieved in the riveting process, lateral displacement or deformation of the iron core to be machined is effectively prevented, and the machining efficiency is improved. Therefore, the riveting forming quality and consistency are remarkably improved, an additional independent driving device is not needed, the equipment structure is simplified, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of riveting machine technology, and in particular to a riveting machine for forming iron cores. Background Technology

[0002] In the riveting process of AC contactor core, it is crucial to ensure that the core maintains a precise and stable position when subjected to vertical riveting pressure. The core is usually made of multiple layers of silicon steel sheets stacked together and has pins inserted through it. By riveting the two ends of the pins, the multiple sheets are fastened into a single finished product.

[0003] Existing riveting equipment typically focuses on pressing the iron core vertically. However, during the riveting process, the iron core is prone to lateral movement or slight deformation in the horizontal plane. This problem is particularly prominent when the iron core structure is relatively precise or the riveting force is large. Although some equipment attempts to improve this by adding independent lateral clamping mechanisms, these mechanisms often require additional drive sources (such as cylinders or hydraulic cylinders) and complex control timing. This not only increases the complexity and manufacturing cost of the equipment but may also lead to positioning lag or uneven clamping force due to poor synchronization with the main riveting action, ultimately affecting the riveting quality and dimensional consistency of the iron core. Therefore, how to achieve reliable lateral positioning and clamping that is efficient, automatically synchronized with the main riveting action without significantly increasing system complexity has become a core problem that urgently needs to be solved in the field of iron core riveting equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a riveting press for iron core forming to solve the problems mentioned in the background art.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A riveting machine for forming iron cores includes a main body, a material placement platform for placing the iron core to be processed is provided on one side of the main body, and an operating platform for performing riveting processing is provided on the main body; characterized in that: a lower riveting seat is fixedly provided at the upper end of the operating platform, the lower riveting seat has a riveting station, a positioning carrier that can slide in the front-back direction is installed in the riveting station, the iron core to be processed is loaded on the positioning carrier and positioned in the front-back direction by the positioning carrier; an upper riveting seat is correspondingly provided above the lower riveting seat, the upper riveting seat can perform vertical lifting and lowering movement to realize mold closing or mold opening with the lower riveting seat, at least one riveting punch is fixedly provided at the lower end of the upper riveting seat, and the riveting processing of the iron core to be processed loaded on the positioning carrier is performed by the mold closing action of the upper riveting seat and the lower riveting seat; The lower riveting seat is provided with laterally movable side clamping blocks on both sides of the riveting station. The two side clamping blocks are initially located in a retracted position away from the riveting station. The lower end of the upper riveting seat protrudes downward to form two pushing blocks corresponding to the side clamping blocks. As the upper riveting seat moves downward and gradually closes with the lower riveting seat, the two pushing blocks act on the corresponding side clamping blocks, driving the two side clamping blocks to move synchronously towards the center of the riveting station. When the upper and lower riveting seats are fully closed, the two side clamping blocks will closely contact the two sides of the iron core to be processed, which is mounted on the positioning carrier, thereby achieving lateral auxiliary positioning and stable clamping of the iron core to be processed during the riveting process.

[0006] By adopting the above technical solution, the side clamping block is directly driven by the lifting movement of the upper riveting seat, realizing the complete mechanical linkage and synchronization between the lateral clamping action and the main riveting mold closing action. This effectively solves the problem that the lateral positioning requires an additional driving source and control timing in the background technology. It not only simplifies the equipment structure and reduces the cost, but also ensures that the iron core can obtain reliable lateral constraint at the precise moment when the riveting pressure is applied, thereby significantly improving the positional stability and forming size consistency of the iron core during the riveting process.

[0007] A further feature is that the outer upper edge region of each side clamping block is machined to form an inclined guide surface; each pushing block includes an integrally connected upper mounting section and a lower driving section, the lower driving section having a wedge-shaped cross-section with a larger upper section and a smaller lower section, and its side surface facing the side clamping block is configured as a wedge-shaped driving surface that matches the inclined guide surface; during the process of the upper riveting seat moving downward to perform mold closing, the wedge-shaped driving surface contacts and slides relative to the corresponding inclined guide surface, thereby converting the vertical downward movement of the upper riveting seat into a horizontal inward thrust on the side clamping blocks, thereby driving the two side clamping blocks to move synchronously towards the center of the riveting station.

[0008] By adopting the above technical solution, the lower drive section of the riveting punch is designed as a wedge structure, so that its wedge drive surface cooperates with the inclined guide surface of the side clamping block. This cleverly converts the vertical clamping force directly into the horizontal internal thrust of the side clamping block, further simplifying the mechanism. There is no need to set up an independent drive inclined surface outside the push block, making the power transmission more direct and efficient. At the same time, it ensures that the generation of the lateral clamping force is strictly synchronized with the riveting process.

[0009] A further configuration is as follows: the bottom surface of the lower drive section is connected to the wedge-shaped drive surface by a continuous smooth transition surface, and the top surface of the side clamping block is also connected to the inclined guide surface by a continuous smooth transition surface.

[0010] By adopting the above technical solution, the force condition of the wedge-shaped driving surface and the inclined guide surface during contact and sliding can be greatly improved, making the lateral movement of the side clamping block more stable and smooth, and reducing the wear of the contact surface.

[0011] A further configuration is as follows: side stops are fixedly provided on both sides of the lower rivet seat, and the two side stops are respectively located outside the two side clamping blocks and can collide with the corresponding side clamping blocks to limit their movement; at least one extension shaft extending horizontally outward is fixedly provided on the side stops, a tension spring is sleeved on the extension shaft, a retaining ring is fixedly provided at the outer end of the extension shaft, a through hole is opened in the side stops, one end of the tension spring is connected to the retaining ring, and the other end passes through the through hole and is connected to the side clamping block.

[0012] By adopting the above technical solution, the tension spring can reliably pull the clamping part back to the initial retraction position after the upper and lower rivet seats are separated, ensuring that the workpiece can be smoothly removed or a new workpiece can be put in after the mold is opened.

[0013] A further setting is as follows: two positioning blocks spaced apart front and back are fixedly installed on the positioning carrier, and the iron core to be processed is loaded in the area between the two positioning blocks on the positioning carrier, with the two positioning blocks providing positioning in the front and back direction.

[0014] By adopting the above technical solution, it can be ensured that the iron core is accurately fixed in the preset position in the front-back direction, providing an accurate preliminary positioning basis for subsequent riveting and lateral clamping actions, thereby improving the repeatability of the overall processing.

[0015] A further feature is that the positioning carrier is fixedly equipped with a handle for easy pushing and pulling.

[0016] By adopting the above technical solutions, operators can push or pull the heavy positioning carrier along with the iron core into or out of the riveting station more effortlessly and smoothly. This not only improves the efficiency of loading and unloading but also reduces labor intensity. At the same time, it reduces the possibility of the positioning carrier being bumped or mispositioned due to the inconvenience of pushing and pulling, thus improving the safety and convenience of operation.

[0017] A further feature is that the lower riveting seat has a positioning pin located below the riveting station and arranged vertically inside. The lower end of the positioning carrier has a positioning groove. When the positioning carrier is pushed into the riveting station, the positioning pin will match the position of the positioning groove and can be pushed into the positioning groove to prevent the positioning carrier from shifting position.

[0018] By adopting the above technical solution, it is possible to effectively prevent the positioning carrier from making slight horizontal movements or rotations when subjected to lateral clamping forces or vibrations, thereby further locking the position of the carrier and indirectly enhancing the overall stability of the upper iron core during the processing, and ensuring the riveting accuracy.

[0019] A further feature is that a horizontally extending indicator rod is fixedly mounted on the positioning pin, and an observation window is opened on the front wall of the lower riveting seat, with the outer end of the indicator rod extending through the observation window to the outside of the lower riveting seat.

[0020] By adopting the above technical solution, an indicator rod is added to the positioning pin, along with an observation window on the lower rivet seat, making the lifting and lowering status of the positioning pin intuitively visible. Operators can observe the position of the indicator rod to confirm whether the carrier is fully in place and locked. This design provides important status feedback, greatly facilitating alignment confirmation during operation, helping to prevent processing failures or product defects caused by the carrier not being positioned correctly, and improving the safety and reliability of operation. It also allows operators to manually control the positioning pin to disengage from the positioning slot, so as to smoothly pull out the positioning carrier.

[0021] A further feature is that a spring is compressed at the lower end of the positioning pin or indicator rod, and the spring applies an upward moving force to the positioning pin, enabling it to push into the positioning groove.

[0022] By adopting the above technical solution, it is ensured that the positioning pin can be actively and reliably pushed into the positioning slot of the positioning carrier.

[0023] In summary, the present invention has the following beneficial effects: the positioning carrier realizes the front and rear positioning of the iron core, the side clamping block automatically drives the descent of the upper riveting seat to realize the lateral synchronous clamping of the iron core, and the positioning pin and positioning groove cooperate to prevent the carrier from moving. Thus, it provides stable and reliable multi-directional positioning and clamping for the iron core throughout the riveting process, effectively improving the processing accuracy and product quality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 This is a schematic diagram of the upper and lower riveting bases in the embodiment; Figure 3 This is a schematic diagram of the upper riveting seat in the embodiment; Figure 4 This is an exploded view of the lower rivet seat in the embodiment.

[0025] In the diagram: 11. Main body of the equipment; 12. Material placement platform; 13. Operating platform; 14. Servo motor; 21. Lower riveting seat; 22. Upper riveting seat; 31. Positioning carrier; 311. Positioning block; 312. Pull handle; 32. Side clamping block; 321. Inclined guide surface; 41. Riveting punch; 42. Push block; 421. Upper mounting section; 422. Lower drive section; 4221. Wedge-shaped drive surface; 4222. Smooth transition surface; 51. Side stop block; 52. Extension shaft; 53. Tension spring; 54. Retaining ring; 61. Positioning pin; 62. Positioning groove; 63. Indicator rod; 71. Observation window. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] like Figure 1-4 The riveting machine shown is mainly used for riveting laminated iron cores to ensure their structural stability. Specifically, it includes a main body 11, and a material placement platform 12 is provided on one side of the main body 11 for placing iron cores to be processed. The material placement platform 12 is used to neatly place multiple iron cores to be processed in advance for easy access by the operator.

[0029] The main body 11 of the equipment is equipped with an operating table 13 for riveting. A lower riveting seat 21 is fixedly installed on the upper end of the operating table 13, and a rectangular riveting station is opened in the middle of the lower riveting seat 21. A positioning carrier 31 that can slide in the front-back direction is installed in the riveting station. The iron core to be processed is loaded into the positioning carrier 31 manually or by a robot before processing. In order to achieve precise positioning of the iron core to be processed in the front-back direction, two positioning blocks 311 with front-back spacing are fixedly installed on the upper end of the positioning carrier 31. The iron core to be processed is placed in the area between the two positioning blocks 311, so that they provide reliable front-back limit. For the convenience of the operator to push and pull, a pull handle 312 is also fixedly installed on the upper end of the positioning carrier 31.

[0030] Above the lower riveting seat 21, an upper riveting seat 22 is correspondingly provided. The upper riveting seat 22 is controlled by a drive mechanism fixedly mounted on the upper end of the equipment body 11. The drive mechanism can be a hydraulic cylinder or a servo motor. In this embodiment, a servo motor 14 is preferred. Under the control of the servo motor, the upper riveting seat 22 can perform precise vertical lifting and lowering movements, thereby realizing the mold closing or opening with the lower riveting seat 21. At least one riveting punch 41 for performing riveting is fixedly connected to the lower end of the upper riveting seat 22. In this embodiment, there are two riveting punches 41. When the upper riveting seat 22 descends to close with the lower riveting seat 21, the two riveting punches 41 will apply pressure to the iron core to be processed, which is loaded on the positioning carrier 31, to complete the riveting process.

[0031] To achieve auxiliary positioning and stable clamping of the iron core during the riveting process and prevent its lateral movement, the lower riveting seat 21 is equipped with a laterally movable side clamping block 32 on each of the left and right sides of the riveting station. In the initial state, these two side clamping blocks 32 are located in a retracted position away from the center of the riveting station to facilitate the insertion and removal of the positioning carrier 31. Corresponding to these two side clamping blocks 32, two pushing blocks 42 protrude downward from the lower end of the upper riveting seat 22. As the upper riveting seat 22 moves downward and gradually closes with the lower riveting seat 21, these two pushing blocks 42 will contact and act on the corresponding side clamping blocks 32, thereby driving the two side clamping blocks 32 to move synchronously towards the center of the riveting station. When the upper riveting seat 22 and the lower riveting seat 21 are fully closed, the two side clamping blocks 32 also move inward synchronously to make close contact and clamp the two sides of the iron core to be processed loaded on the positioning carrier 31, thereby achieving lateral clamping of the iron core to be processed during the key riveting process.

[0032] In a preferred embodiment of the driving side clamping blocks 32, each side clamping block 32 has an inclined guide surface 321 machined on its outer upper edge. Simultaneously, each pushing block 42 includes an integrally connected upper mounting section 421 and a lower driving section 422; the lower driving section 422 has a wedge-shaped cross-section designed to be larger at the top and smaller at the bottom, with its side surface facing the side clamping block 32 forming a wedge-shaped driving surface 4221 that matches the inclined guide surface 321. During the downward movement of the upper riveting seat 22 to perform mold closing, the wedge-shaped driving surface 4221 of the riveting punch 41 contacts and slides relative to the inclined guide surface 321 of the corresponding side clamping block 32. Through this wedge-shaped surface cooperation, the vertical downward movement of the upper riveting seat 22 is cleverly converted into a horizontal inward thrust on the side clamping blocks 32, efficiently driving the two side clamping blocks 32 to synchronously translate towards the center. To ensure smooth movement and reduce impact and wear, the bottom surface of the lower drive section 422 is connected to the wedge-shaped drive surface 4221 by a continuous smooth transition surface 4222; similarly, the top surface of the side clamping block 32 is also connected to the inclined guide surface 321 by a continuous smooth transition surface 4222.

[0033] The specific structure for resetting and limiting the side clamping block 32 is as follows: Side stops 51 are fixedly installed on both the left and right sides of the lower rivet base 21, respectively, located on the outer side of the corresponding side clamping block 32. The side stops 51 can limit the outward movement of the side clamping block 32 to its maximum position, i.e., the retracted position, by colliding with it. On the outer side of each side stop 51, at least one outwardly extending horizontally extending shaft 52 is fixedly provided, and a tension spring 53 is sleeved on the extension shaft 52; there are two extension shafts 52, spaced apart. A through hole is provided in the side stop 51 to allow the extension shaft 52 and tension spring 53 to pass through. A retaining ring 54 is fixedly provided at the outermost end of the extension shaft 52; one end of the tension spring 53 is connected to the retaining ring 54, and the other end passes through the through hole and connects to the outer surface of the side clamping block 32. Under the action of the tension spring 53, the side clamping block 32 is continuously pulled outward, thus stably maintaining its initial retracted position; when the upper riveting seat 22 drives the side clamping block 32 to move inward, the tension spring 53 is stretched; after the mold closing is completed, the upper riveting seat 22 rises, the tension spring 53 releases its elastic force, and pulls the side clamping block 32 back to its original position.

[0034] Furthermore, to prevent accidental displacement of the positioning carrier 31 during riveting, an anti-displacement structure is provided inside the lower riveting seat 21. This includes a vertically positioned positioning pin 61 located directly below the riveting station, with a corresponding positioning groove 62 on the lower end face of the positioning carrier 31. When the operator pushes the positioning carrier 31, loaded with the iron core to be processed, into the accurate processing position of the riveting station in the front-back direction, the lower positioning pin 61 will vertically align with the positioning groove 62. A spring (either located at the lower end of the positioning pin 61 or the indicator rod 63, not shown in the figure) provides an upward elastic force to the positioning pin 61. Under this elastic force, the top of the positioning pin 61 will push upward into the positioning groove 62 of the positioning carrier 31, thereby locking it horizontally and effectively preventing displacement of the positioning carrier 31 during lateral clamping or riveting. To facilitate observation of whether the positioning carrier 31 is properly installed, a horizontally extending indicator rod 63 is fixedly connected to the positioning pin 61. An observation window 71 is provided on the front wall of the lower rivet base 21, and the outer end of the indicator rod 63 extends through this observation window 71 to the outside of the lower rivet base 21. When the positioning pin 61 rises due to the positioning carrier 31 being in place, the outer end of the indicator rod 63 also rises synchronously, allowing the operator to visually determine the positioning status through the observation window 71. When it is necessary to remove the positioning carrier 31, applying a downward force to the indicator rod 63 to overcome the spring force will cause the positioning pin 61 to exit the positioning groove 62.

[0035] In summary, this embodiment achieves front-to-back positioning of the iron core through the positioning carrier 31, achieves lateral synchronous clamping of the iron core through the side clamping block 32 automatically driven when the upper riveting seat 22 descends, and prevents the carrier from moving through the cooperation of the positioning pin 61 and the positioning groove 62. Thus, it provides stable and reliable multi-directional positioning and clamping for the iron core throughout the riveting process, effectively improving processing accuracy and product quality.

[0036] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A riveting press for forming iron cores, comprising a main body (11), wherein a material placement platform (12) for placing iron cores to be processed is provided on one side of the main body (11), and an operating table (13) for performing riveting processing is provided on the main body (11); characterized in that: The upper end of the operating table (13) is fixedly provided with a lower riveting seat (21). The lower riveting seat (21) is provided with a riveting station. A positioning carrier (31) that can slide in the front-back direction is installed in the riveting station. The iron core to be processed is loaded on the positioning carrier (31) and the positioning carrier (31) provides positioning in the front-back direction. An upper riveting seat (22) is provided above the lower riveting seat (21). The upper riveting seat (22) can perform vertical lifting and lowering movements to realize mold closing or mold opening with the lower riveting seat (21). At least one riveting punch (41) is fixedly provided at the lower end of the upper riveting seat (22). Through the mold closing action of the upper riveting seat (22) and the lower riveting seat (21), the riveting processing of the iron core to be processed loaded on the positioning carrier (31) is performed. The lower riveting seat (21) is provided with side clamping blocks (32) that can move laterally on both sides of the riveting station. The two side clamping blocks (32) are initially located in a retracted position away from the riveting station. The lower end of the upper riveting seat (22) protrudes downward to form two pushing blocks (42) with positions corresponding to the side clamping blocks (32). During the process of the upper riveting seat (22) moving downward and gradually closing the mold with the lower riveting seat (21), the two pushing blocks (42) will act on the corresponding side clamping blocks (32) respectively, driving the two side clamping blocks (32) to move synchronously towards the center of the riveting station. When the upper riveting seat (22) and the lower riveting seat (21) are completely closed, the two side clamping blocks (32) will closely contact the two sides of the iron core to be processed loaded on the positioning carrier (31), thereby realizing the lateral auxiliary positioning and stable clamping of the iron core to be processed during the riveting process.

2. A riveting press for forming iron cores according to claim 1, characterized in that: Each of the side clamping blocks (32) has an inclined guide surface (321) formed on its outer upper edge region; each of the push blocks (42) includes an integrally connected upper mounting section (421) and a lower driving section (422). The lower driving section (422) has a wedge-shaped structure with a larger upper section and a smaller lower section in cross-section. The side surface facing the side clamping block (32) is configured as a wedge-shaped driving surface (4221) that matches the inclined guide surface (321). During the process of the upper riveting seat (22) moving downward to perform mold closing, the wedge-shaped driving surface (4221) contacts and slides relative to the corresponding inclined guide surface (321), thereby converting the vertical downward movement of the upper riveting seat (22) into a horizontal inward thrust on the side clamping block (32), which in turn drives the two side clamping blocks (32) to move synchronously towards the center of the riveting station.

3. A riveting press for core forming according to claim 2, characterized in that: The bottom surface of the lower drive section (422) is connected to the wedge-shaped drive surface (4221) by a continuous smooth transition surface (4222), and the top surface of the side clamping block (32) is also connected to the inclined guide surface (321) by a continuous smooth transition surface (4222).

4. A riveting press for core forming according to claim 1, characterized in that: Side blocks (51) are fixedly provided on both sides of the lower rivet seat (21). The two side blocks (51) are located on the outside of the two side clamping blocks (32) respectively, and can collide with the corresponding side clamping blocks (32) to limit the movement. At least one extension shaft (52) extending outward horizontally is fixedly provided on the side block (51). A tension spring (53) is sleeved on the extension shaft (52). A retaining ring (54) is fixedly provided at the outer end of the extension shaft (52). A through hole is opened in the side block (51). One end of the tension spring (53) is connected to the retaining ring (54), and the other end passes through the through hole and is connected to the side clamping block (32).

5. A riveting press for core forming according to claim 1, characterized in that: The positioning carrier (31) is fixedly provided with two positioning blocks (311) spaced back and forth. The iron core to be processed is loaded in the area between the two positioning blocks (311) on the positioning carrier (31), and the two positioning blocks (311) provide positioning in the back and forth direction.

6. A riveting press for core forming according to claim 1, characterized in that: The positioning carrier (31) is fixedly provided with a pull handle (312) for easy pushing and pulling.

7. A riveting press for core forming according to claim 1, characterized in that: The lower riveting seat (21) is provided with a positioning pin (61) located below the riveting station and arranged vertically. The positioning carrier (31) has a positioning groove (62) at its lower end. When the positioning carrier (31) is pushed into the riveting station, the positioning pin (61) will match the position of the positioning groove (62). The positioning pin (61) can be pushed into the positioning groove (62) to prevent the positioning carrier (31) from shifting position.

8. A riveting press for forming iron cores according to claim 7, characterized in that: A horizontally extending indicator rod (63) is fixedly installed on the positioning pin (61), and an observation window (71) is opened on the front wall of the lower riveting seat (21). The outer end of the indicator rod (63) extends to the outside of the lower riveting seat (21) through the observation window (71).

9. A riveting press for forming iron cores according to claim 8, characterized in that: A spring is compressed at the lower end of the positioning pin (61) or the indicator rod (63), and the spring applies an upward moving force to the positioning pin (61) that can push it into the positioning groove (62).

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