Riveting press with quick die changing device

Abstract

The utility model relates to the field of squeeze riveter devices, and discloses a squeeze riveter with a quick die changing device, which comprises a working table, a control box is arranged on one side of the top of the working table, a mounting plate is fixedly connected to the middle side of the top of the working table, and a feeding assembly is arranged on the other side of the top of the working table. A downward pressing air cylinder is fixedly connected to the front end of the top of the mounting plate, a discharging plate is arranged at the front end of the middle of the mounting plate, a lower die assembly is arranged under the downward pressing air cylinder, a downward pressing rod is arranged at the bottom of the downward pressing air cylinder, an upper die is arranged in the downward pressing rod, and a quick disassembling assembly is arranged in the upper die. According to the utility model, the rapid assembly and disassembly of the upper die are realized through the rapid disassembly assembly, the conical block is matched with the driven rod to be clamped into the clamping groove to complete locking, the control pin is pulled out during die replacement, the conical block resets to drive the driven rod to retract, the upper die can be rapidly taken out, the structure is simple, and the operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of riveting machine devices, and in particular to a riveting machine with a quick mold changing device. Background Technology

[0002] Currently, riveting machines, as specialized equipment widely used for joining metal sheets, are commonly found in the structural assembly of products such as electrical appliance housings, automotive parts, and mechanical frames. Their core function is to press rivets into pre-set holes using mechanical or pneumatic methods to achieve stable fastening. With the increasing demands for precision, efficiency, and flexible processing capabilities in industrial manufacturing, the traditional fixed mold structure of riveting machines is gradually failing to meet the diverse and multi-process riveting requirements. Therefore, riveting equipment with rapid mold-changing capabilities is gradually becoming a key focus of industry development.

[0003] To address the aforementioned issues, some existing riveting machines have incorporated quick-change mold mechanisms to solve the problems of cumbersome mold replacements and long downtime. These devices typically connect and disconnect the upper mold and the press head using methods such as bolt unlocking, sliding guide rail positioning, or cam locking devices. During mold replacement, the operator generally needs to loosen the mechanical limit switches, manually position the new mold, and then complete the assembly by pushing it in laterally or vertically. These structures generally employ rigid connections and simple elastic fits, making them suitable for production conditions where mold type changes are infrequent.

[0004] However, in practical applications, these quick mold-changing structures still have several problems. Mold insertion structures often lack automatic locking feedback, requiring manual confirmation of the connection status, which can easily lead to misinstallation or improper assembly. Mold locking usually requires manual tightening or the use of tools, which is time-consuming and inefficient. Guide and limit components are prone to loosening under vibration conditions, resulting in insufficient mold positioning accuracy. In some structures, the driven mechanism responds slowly, mold insertion is not smooth, the slot fit is not tight, and frequent use leads to significant loosening. Under these circumstances, problems such as low mold-changing efficiency, large repeatability errors, and short equipment lifespan gradually emerge, limiting their promotion and application in high-cycle automated production lines.

[0005] To address the above problems, a riveting machine with a quick mold changing device is proposed. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a riveting machine with a quick mold changing device, which aims to solve the problem of long mold changing time in existing riveting machines.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a riveting machine with a quick mold changing device, comprising a worktable, a foot controller on the front side of the worktable, a control box on one side of the top of the worktable, a power knob on the outside of the control box, a mounting plate fixedly connected to the middle of the top of the worktable, a feeding assembly on the other side of the top of the worktable, a pressing cylinder fixedly connected to the front end of the top of the mounting plate, a discharge plate at the front end of the middle of the mounting plate, and a lower mold assembly directly below the pressing cylinder. A downward pressure rod is provided at the bottom of the cylinder, and an upper mold is provided inside the downward pressure rod. A quick-release assembly is provided inside the upper mold. The quick-release assembly includes a conical block, and a circular plate is fixedly connected to the bottom of the conical block. Both are slidably connected inside the upper mold. A return spring is provided at the bottom of the circular plate. An inner groove is opened at the bottom of the downward pressure rod. Multiple slots are opened inside the inner groove, and a release cavity is opened at the top of the inner groove. A control pin is inserted into the release cavity. Multiple driven rods are arranged around the inside of the side wall of the upper mold, and a limit plate is provided on the outside of the driven rods.

[0008] As a further description of the above technical solution:

[0009] The driven rod has an inclined surface on the side near the center of the upper mold, and the inclined surface is in contact with the side of the cone block.

[0010] As a further description of the above technical solution:

[0011] The upper mold has a groove inside its side wall. The limiting plate is slidably connected inside the groove, and multiple compression springs are provided between the limiting plate and the groove. The multiple compression springs are distributed around the outside of the driven rod.

[0012] As a further description of the above technical solution:

[0013] The end of the driven rod away from the center of the upper mold is inserted into the inside of the slot, and the top of the conical block abuts against the bottom of the control pin.

[0014] As a further description of the above technical solution:

[0015] The feeding assembly includes an air box, a vibrating plate is provided on the top of the air box, a storage device is provided at the output end of the vibrating plate, and a feeding pipe is fixedly connected to the output end of the storage device.

[0016] As a further description of the above technical solution:

[0017] The output port of the air box is connected to the storage device through a pipe, and the end of the feeding pipe away from the storage device is fixedly connected to the inside of the discharge plate.

[0018] As a further description of the above technical solution:

[0019] The front end of the discharge plate is provided with two clamps, the interior of which is connected to the interior of the discharge plate.

[0020] As a further description of the above technical solution:

[0021] The lower mold assembly includes a bottom block and a pad block with two lower molds installed on the top sides. A rotary cylinder is provided at the bottom of the bottom block, and the rotary cylinder is located inside the pad block.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the lower pressure rod at the bottom of the cylinder is connected to the upper mold via a quick-release assembly. When installing upwards, the conical block at the top of the upper mold is inserted into the inner groove of the lower pressure rod. The conical block first contacts the control pin at the top and then slides into the upper mold. Its inclined surface contacts multiple driven rods on the outside, causing the other end of the driven rod to slide out from the side wall of the upper mold. Finally, the driven rod is stuck in the slot opened inside the lower pressure rod, completing the quick installation of the upper mold. When the upper mold needs to be replaced, the control pin can be pulled out, and an additional release cavity appears at the top of the conical block. Under the action of the compressed return spring at the bottom of the circular plate, the conical block moves upwards. After the multiple driven rods lose the squeezing force, under the action of the compression spring on their outside, the driven rods slide back into the upper mold. At this time, the upper mold can be easily removed. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a riveting machine with a quick mold changing device proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of a vibratory feeder for a riveting machine with a quick mold changing device proposed in this utility model;

[0026] Figure 3 for Figure 1 Enlarged view of A in the middle;

[0027] Figure 4 This is a schematic diagram of the upper mold of a riveting machine with a quick mold changing device proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the control pin of a riveting machine with a quick mold changing device proposed in this utility model;

[0029] Figure 6 for Figure 5 A magnified view of B in the middle.

[0030] Legend:

[0031] 1. Workbench; 2. Foot pedal controller; 3. Control box; 4. Power knob; 5. Pressing cylinder; 51. Pressing rod; 52. Upper mold; 6. Mounting plate; 7. Feeding assembly; 701. Air box; 702. Vibratory feeder; 703. Storage container; 704. Feeding pipe; 8. Lower mold assembly; 801. Base block; 802. Lower mold; 803. Rotary cylinder; 804. Pad block; 9. Discharge plate; 91. Clamp; 10. Quick release assembly; 1001. Conical block; 1002. Circular plate; 1003. Return spring; 1004. Inner groove; 1005. Slot; 1006. Release chamber; 1007. Control pin; 1008. Driven rod; 1009. Limit plate; 1010. Compression spring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 1 - Figure 4This utility model provides an embodiment of a riveting machine with a quick mold changing device, comprising a workbench 1. A foot pedal controller 2 is installed on the front side of the workbench 1, allowing the operator to control the start and stop of the riveting action, improving work efficiency and safety. A control box 3 is installed on one side of the top of the workbench 1, used to install the machine's control circuitry and human-machine interface, facilitating the setting and monitoring of equipment operating parameters. A power knob 4 is installed on the outside of the control box 3 for turning the machine's power on and off, providing intuitive operation and rapid response. Advantages: A mounting plate 6 is fixedly connected to the top center of the workbench 1. The mounting plate 6 is used to support the riveting drive components and ensure the stability of the equipment during operation. A feeding assembly 7 is provided on the other side of the top of the workbench 1. The feeding assembly 7 includes an air box 701, a vibratory feeder 702, a storage container 703, and a feeding pipe 704. The output port of the air box 701 is connected to the storage container 703 through a pipe to provide pneumatic power to the material conveying system. The vibratory feeder 702 is used for directional correction and automatic material distribution of the rivets. The storage container 703 can temporarily store rivets to achieve continuous feeding. The feed tube 704 directionally conveys the rivets to the discharge plate 9, achieving automated feeding. A pressing cylinder 5 is fixedly connected to the top front end of the mounting plate 6 to provide the downward pressure required for riveting. A pressing rod 51 is connected to its bottom, and a detachable upper mold 52 is provided inside the pressing rod 51. A discharge plate 9 is located at the middle front end of the mounting plate 6. Two clamps 91 are provided at the front end of the discharge plate 9, communicating with the interior of the discharge plate 9 to assist in positioning and stabilizing the workpiece to be riveted, ensuring riveting accuracy. A lower mold assembly 8 is located directly below the pressing cylinder 5. The lower mold assembly 8 includes a base block 801, two lower molds 802, a pad block 804, and a rotary cylinder 803. The base block 801 supports the lower molds 802, and the rotary cylinder 803 drives the lower molds 802 to rotate and shift to adapt to the riveting requirements of workpieces of different specifications. The pad block 804 serves as a buffer and positioning element. The upper mold 52 is equipped with a quick-release assembly 10, which enables the rapid disassembly of the upper mold 52 without the need for tools. This improves mold replacement efficiency, reduces manual labor intensity, and ensures accurate positioning and convenient assembly and disassembly, effectively improving equipment operation stability and maintenance efficiency.

[0034] Reference Figure 4 - Figure 6The quick-release assembly 10 includes a conical block 1001, which has a conical structure. A circular plate 1002 is fixedly connected to its bottom. The conical block 1001 and the circular plate 1002 are slidably connected to the internal cavity of the upper mold 52, forming an integrated moving unit. A return spring 1003 is provided at the bottom of the circular plate 1002. The return spring 1003 is installed in the bottom groove of the upper mold 52 and has the function of applying an upward elastic force to the conical block 1001 after the control pin 1007 is removed. An inner groove is provided at the bottom of the lower pressure rod 51. 1004 is used to accommodate the insertion and locking mechanism of the conical block 1001. Multiple slots 1005 are evenly distributed circumferentially inside the inner groove 1004. Each slot 1005 is used to engage and lock with the driven rod 1008 to ensure the stability and anti-displacement capability of the upper mold 52 during the riveting process. At the same time, a release cavity 1006 is also provided at the top of the inner groove 1004. A control pin 1007 is inserted into the release cavity 1006 to limit the axial movement of the conical block 1001 and prevent it from loosening when not being replaced. Multiple driven rods 1008 are arranged around the inner sidewall of the upper mold 52. The side of the driven rod 1008 near the center of the upper mold 52 has an inclined surface structure that cooperates with the conical block 1001. When the upper mold 52 inserts the pressing rod 51 upward, the conical block 1001 gradually enters the inner groove 1004 and contacts the control pin 1007. With further insertion, the conical block 1001 slides along the inclined surface and pushes the inner ends of the multiple driven rods 1008 outward. The end away from the center inserts into the corresponding slot 1005, forming a mechanical self-locking state. A limit plate 1009 is provided on the outer side of each driven rod 1008. The limit plate 1009 is slidably connected in the groove in the sidewall of the upper mold 52. A continuous clamping force is applied to the limit plate 1009 by multiple compression springs 1010 distributed around the outer side of the driven rod 1008, so that the position of the driven rod 1008 can be firmly maintained in the locked state, avoiding structural loosening caused by vibration or impact. When the upper mold 52 needs to be replaced, the operator can release the top limit of the conical block 1001 by pulling out the control pin 1007. Under the elastic force of the return spring 1003, the circular plate 1002 drives the conical block 1001 to move upward, releasing the contact with the inclined surface of the driven rod 1008. The driven rod 1008 is then driven by the elastic force of the compression spring 1010 to retract into the slide groove and move away from the slot 1005. At this time, the upper mold 52 can be smoothly pulled out from the lower pressure rod 51. The whole operation process is quick and convenient, and no external tools are needed. It effectively improves the mold replacement efficiency and reduces the complexity of operation, and is suitable for rapid switching scenarios of multi-specification products.

[0035] Working principle: The operator starts the equipment via foot pedal controller 2. After receiving the start signal, control box 3 controls the downward pressing cylinder 5 to move. The downward pressing cylinder 5 drives the downward pressing rod 51 to move downward. The upper mold 52 is installed inside the downward pressing rod 51. The upper mold 52 is connected to the downward pressing rod 51 via quick-release assembly 10. The conical block 1001 in quick-release assembly 10 is in an upward pressing state under the action of return spring 1003. Its top abuts against control pin 1007, pushing the driven rod 1008 to expand outward and embed into the slot 1005, realizing a stable connection between the upper mold 52 and the downward pressing rod 51. After the upper mold 52 is aligned with the lower mold 802 in the lower mold assembly 8, the riveting operation is performed. Air box 701 provides power to drive vibration. When the vibratory plate 702 rotates, it arranges the rivets and feeds them into the storage container 703. The storage container 703 then conveys the rivets to the inside of the discharge plate 9 through the feeding pipe 704. The clamp 91 at the front end of the discharge plate 9 positions the rivets to the riveting area. After the riveting is completed, the pressing cylinder 5 returns to its original position, and the upper die 52 moves upward with the pressing rod 51 to prepare for the next riveting. When the upper die 52 needs to be replaced, the control pin 1007 is pulled out from the release chamber 1006, and the conical block 1001 moves upward under the action of the return spring 1003, releasing the pressure on the driven rod 1008. The driven rod 1008 retracts into the upper die 52 under the action of the compression spring 1010, thereby realizing the quick disassembly of the upper die 52.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A riveting machine with a quick mold changing device, comprising a worktable (1), characterized in that: A foot pedal controller (2) is provided on the front side of the workbench (1). A control box (3) is provided on one side of the top of the workbench (1). A power knob (4) is provided on the outside of the control box (3). A mounting plate (6) is fixedly connected to the middle of the top of the workbench (1). A feeding assembly (7) is provided on the other side of the top of the workbench (1). A pressing cylinder (5) is fixedly connected to the front end of the top of the mounting plate (6). A discharge plate (9) is provided at the front end of the middle of the mounting plate (6). A lower mold assembly (8) is provided directly below the pressing cylinder (5). A pressing rod (51) is provided at the bottom of the pressing cylinder (5). An upper mold (52) is provided inside the pressing rod (51). A quick-release assembly (10) is provided inside the upper mold (52). The quick-release assembly (10) includes a conical block (1001), the bottom of which is fixedly connected to a circular plate (1002). Both are slidably connected inside the upper mold (52). A return spring (1003) is provided at the bottom of the circular plate (1002). An inner groove (1004) is provided at the bottom of the pressing rod (51). Multiple slots (1005) are provided inside the inner groove (1004). A release cavity (1006) is provided at the top of the inner groove (1004). A control pin (1007) is inserted into the release cavity (1006). Multiple driven rods (1008) are arranged around the inside of the side wall of the upper mold (52). A limit plate (1009) is provided on the outside of the driven rods (1008).

2. A riveting machine with a quick mold changing device according to claim 1, characterized in that: The driven rod (1008) has an inclined surface on the side near the center of the upper mold (52), and the inclined surface is in contact with the side of the conical block (1001).

3. A riveting machine with a quick mold changing device according to claim 1, characterized in that: The upper mold (52) has a sliding groove inside its side wall. The limiting plate (1009) is slidably connected inside the sliding groove. A plurality of compression springs (1010) are provided between the limiting plate (1009) and the sliding groove. The plurality of compression springs (1010) are distributed around the outside of the driven rod (1008).

4. A riveting machine with a quick mold changing device according to claim 1, characterized in that: One end of the driven rod (1008) away from the center of the upper mold (52) is inserted into the inside of the slot (1005), and the top of the conical block (1001) abuts against the bottom of the control pin (1007).

5. A riveting machine with a quick mold changing device according to claim 1, characterized in that: The feeding assembly (7) includes an air box (701), a vibratory feeder (702) is provided on the top of the air box (701), a storage device (703) is provided at the output end of the vibratory feeder (702), and a feeding pipe (704) is fixedly connected to the output end of the storage device (703).

6. A riveting machine with a quick mold changing device according to claim 5, characterized in that: The output port of the air box (701) is connected to the storage container (703) through a pipe, and the end of the feeding pipe (704) away from the storage container (703) is fixedly connected to the inside of the discharge plate (9).

7. A riveting machine with a quick mold changing device according to claim 1, characterized in that: The front end of the discharge plate (9) is provided with two clamps (91), the interior of which is connected to the interior of the discharge plate (9).

8. A riveting machine with a quick mold changing device according to claim 1, characterized in that: The lower mold assembly (8) includes a bottom block (801) and a pad block (804). Two lower molds (802) are installed on the top two sides of the bottom block (801). A rotary cylinder (803) is provided at the bottom of the bottom block (801) and the rotary cylinder (803) is located inside the pad block (804).

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