Cold heading forming die for rivet

Abstract

The utility model discloses a rivet cold heading forming die which comprises a bottom plate and a first fixing plate fixedly connected to the bottom plate, a rotatable rotating disc is arranged on one side of the first fixing plate, a plurality of main die grooves are evenly formed in the rotating disc, and a second fixing plate is fixedly connected to the position, located on one side of the first fixing plate, of the top of the bottom plate. A second rotating shaft is rotationally connected into the second fixing plate, an exchange disc is fixedly connected to the side, close to the rotating disc, of the second rotating shaft, an air cylinder is fixedly connected to the side, close to the exchange disc, of the second fixing plate and located above the second rotating shaft, and a plurality of die punching block assemblies are evenly arranged on the exchange disc. By means of the structure, the multiple punching module assemblies arranged on the exchange disc are used in cooperation with the air cylinders, the punching modules in the punching module assemblies can apply pressure to rivet materials through operation of the air cylinders, and therefore cold heading forming is achieved. And the second rotating shaft and the control assembly are arranged for replacing the punching module, operation is more convenient, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of rivet processing, in particular to a rivet cold heading forming die. Background Art

[0002] Cold heading, a metal plasticity processing technique, is widely used in the manufacturing of fasteners such as bolts, nuts, and rivets. The cold heading process not only improves material utilization but also significantly enhances the mechanical properties and surface quality of the product, resulting in higher strength and better wear resistance.

[0003] In the prior art, after searching, it was found that a Chinese patent discloses a cold heading die for rivets, and its application number is 201922065097.5. The patent mainly includes a die plate and a main die base. The main die base is located below the die plate. The die plate includes a lower plate and an upper plate. Both the upper plate and the lower plate are regular hexagons. The upper plate is rotatably fixed to the lower end of the lower plate. The lower plate is driven by a hydraulic mechanism to move up and down. Two groups of first molds, second molds and third molds are evenly fixed to the lower end of the upper plate. Each group of first molds, second molds and third molds are symmetrically distributed near the edge of the upper plate. There are two main die bases, and a group of main molds are fixed to the top surface of each main die base. Although the above-mentioned utility model has been improved through a series of improvements, so that the device has molds of different shapes at the same time, and one end of the device is rotatable, different molds can be replaced in time according to needs, which is simple and convenient to use. However, when replacing a mold, it is necessary to first remove the fixing buckle, release the fixing buckle's restrictions on the upper and lower plates, then rotate the upper plate, align the mold to be used with the main mold, and then insert the fixing buckle to fix the upper and lower plates to complete the mold replacement. The entire replacement process is relatively cumbersome, increasing the complexity of the mold replacement process, making it less convenient to use and less practical. Therefore, those skilled in the art provide a rivet cold heading forming die to solve the problems raised in the above background technology. Utility Model Content

[0004] The present invention provides a rivet cold heading die, wherein a plurality of die blocks are arranged on a replacement plate and used in conjunction with a cylinder. The operation of the cylinder causes the die blocks in the die block assembly to apply pressure to the rivet material, thereby achieving cold heading. Furthermore, a second rotating shaft and a control assembly are provided for replacing the die blocks, making operation more convenient and highly practical.

[0005] To achieve the above-mentioned purpose, a rivet cold heading forming die is provided, comprising a base plate and a first fixed plate fixedly connected to the base plate, a rotatable turntable is provided on one side of the first fixed plate, a plurality of main die grooves are evenly arranged inside the turntable, a second fixed plate is fixedly connected to the top of the base plate and located on one side of the first fixed plate, a second rotating shaft is rotatably connected to the inside of the second fixed plate, a switching disk is fixedly connected to the side of the second rotating shaft close to the turntable, a cylinder is fixedly connected to the side of the second fixed plate close to the switching disk and located above the second rotating shaft, and a plurality of punching module assemblies are evenly arranged on the switching disk;

[0006] The punching module assembly includes a sliding rod slidably connected to the inside of the exchange disk, an end plate fixedly connected to the sliding rod near one end of the cylinder, a spring sleeved on the outside of the sliding rod and a punching module fixedly connected to one end of the sliding rod near the turntable, the piston rod of the cylinder is close to the end plate, the punching module is close to the bottom main mold groove, and a control component for driving the second rotating shaft to rotate is provided on one side of the second fixed plate.

[0007] According to the rivet cold heading forming mold, a blanking assembly is provided on the side of the first fixed plate away from the turntable, and the blanking assembly includes an electric push rod fixedly connected to one side of the first fixed plate and a push rod inserted into the inside of the first fixed plate and arranged opposite to the main mold groove, and the push rod is fixedly connected to the piston rod of the electric push rod.

[0008] According to the rivet cold heading forming mold, the first fixed plate is internally rotatably connected to a first rotating shaft fixedly connected to a turntable, the first fixed plate is fixedly connected to a first motor on a side away from the turntable, and the end of the first rotating shaft close to the first motor is fixedly connected to the output shaft of the first motor.

[0009] According to the rivet cold heading forming mold, the first fixed plate is fixedly connected to an L-shaped mounting frame on the side opposite to the push rod, and a baffle with a semi-circular ring structure is fixedly connected to the mounting frame. A gap is set between the baffle and the turntable and is located between the uppermost main mold groove and the lowermost main mold groove.

[0010] According to the rivet cold heading forming mold, the control component includes a second motor fixedly connected to the top of the base plate, a third rotating shaft fixedly connected to the output shaft of the second motor, a worm gear fixedly connected to the end of the second rotating shaft, and a worm fixedly connected to the top of the third rotating shaft and meshing with the worm gear.

[0011] According to the rivet cold heading forming die, two universal ball bearings are installed on one side of the first fixing plate close to the lowermost main die groove, and the universal ball bearings roll in cooperation with the turntable.

[0012] The utility model has the following beneficial effects:

[0013] 1. Compared with existing technologies, this rivet cold heading die utilizes multiple die blocks installed on a switching plate in conjunction with a cylinder. The cylinder's operation causes the die blocks in the die block assembly to apply pressure to the rivet material, thereby achieving cold heading. Furthermore, a second rotating shaft and control assembly are provided for changing die blocks, making operation more convenient and practical.

[0014] 2. Compared with the existing technology, this rivet cold heading forming mold is equipped with a rotatable turntable and a main mold groove inside the turntable, which makes loading work simpler and more efficient. It cooperates with the blanking component to realize automatic unloading, and the loading and unloading efficiency is higher, which is conducive to improving the efficiency of rivet cold heading forming work.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a first overall structural schematic diagram of a rivet cold heading forming die of the utility model;

[0018] Figure 2 This is a second overall structural schematic diagram of a rivet cold heading forming die of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of a replacement plate and a forming die of a rivet cold heading forming die of the utility model;

[0020] Figure 4 This is a schematic diagram of the main structure of a rivet cold heading forming die of the present invention.

[0021] Legend:

[0022] 1. Bottom plate; 2. First fixed plate; 3. First rotating shaft; 4. First motor; 5. Turntable; 6. Main die slot; 7. Mounting frame; 8. Baffle; 9. Second fixed plate; 10. Second rotating shaft; 11. Exchange plate; 12. Second motor; 13. Third rotating shaft; 14. Worm; 15. Worm gear; 16. Slide rod; 17. End plate; 18. Electric push rod; 19. Ejector rod; 20. Cylinder; 21. Spring; 22. Punch module; 23. Universal ball bearing. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The utility model relates to a rivet cold heading forming mold according to an embodiment of the present invention, which includes a base plate 1 and a first fixed plate 2 fixedly connected to the base plate 1, a rotatable turntable 5 is provided on one side of the first fixed plate 2, and a first rotating shaft 3 fixedly connected to the turntable 5 is rotatably connected inside the first fixed plate 2, a first motor 4 is fixedly connected to the side of the first fixed plate 2 away from the turntable 5, and an end of the first rotating shaft 3 close to the first motor 4 is fixedly connected to the output shaft of the first motor 4, and a plurality of main mold grooves 6 are evenly arranged inside the turntable 5, and an L-shaped mounting bracket 7 is fixedly connected to the side of the first fixed plate 2 opposite to the push rod 19, and a semi-circular ring structure baffle 8 is fixedly connected to the mounting bracket 7, and a gap is set between the baffle 8 and the turntable 5 and is located between the uppermost main mold groove 6 and the lowermost main mold groove 6.

[0025] The rivet material to be formed is inserted into the uppermost main die slot 6. The operation of the first motor 4 drives the first rotating shaft 3 to rotate the turntable 5 and the rivet material therein. As the turntable 5 rotates toward the baffle 8, it prevents the rivet material from sliding off. When the rivet material reaches the bottom, it can engage the punch die 22 for cold heading, making loading simpler and more efficient.

[0026] A second fixed plate 9 is fixedly connected to the top of the base plate 1 and located on one side of the first fixed plate 2. A second rotating shaft 10 is rotatably connected inside the second fixed plate 9. A replacement disk 11 is fixedly connected to the side of the second rotating shaft 10 close to the turntable 5. A cylinder 20 is fixedly connected to the side of the second fixed plate 9 close to the exchange disk 11 and located above the second rotating shaft 10. A plurality of punching module assemblies are evenly arranged on the exchange disk 11. The punching module assembly includes a slide rod 16 slidably connected to the inside of the exchange disk 11, an end plate 17 fixedly connected to the slide rod 16 close to one end of the cylinder 20, a spring 21 sleeved on the outside of the slide rod 16 and a punching module 22 fixedly connected to one end of the slide rod 16 close to the turntable 5. The piston rod of the cylinder 20 is close to the end plate 17, and the punching module 22 is close to the bottom main die groove 6.

[0027] When forming the rivet, the cylinder 20 operates to control the piston rod to extend and contact the end plate 17. The moving end plate 17 pushes the punch module 22 to the side of the turntable 5 through the slide rod 16. The punch module 22 applies pressure to the rivet material, thereby achieving cold heading. After the piston of the cylinder 20 is reset, the punch module 22 can be reset under the action of the spring 21, facilitating the next forming work. A plurality of different punch modules 22 are provided on the exchange disk 11. The exchange disk 11 is rotated by the second rotating shaft 10, so that the punch module 22 to be used is moved to the side of the cylinder 20 to complete the exchange work.

[0028] A control component for driving the second rotating shaft 10 to rotate is provided on one side of the second fixed plate 9. The control component includes a second motor 12 fixedly connected to the top of the base plate 1, a third rotating shaft 13 fixedly connected to the output shaft of the second motor 12, a worm gear 15 fixedly connected to the end of the second rotating shaft 10, and a worm 14 fixedly connected to the top of the third rotating shaft 13 and meshing with the worm gear 15, so that the second motor 12 can accurately control the rotation of the exchange disk 11 through the transmission of the worm gear 14 and the worm gear 15.

[0029] A blanking assembly is provided on the side of the first fixed plate 2 away from the turntable 5. The blanking assembly includes an electric push rod 18 fixedly connected to one side of the first fixed plate 2 and a push rod 19 inserted into the first fixed plate 2 and arranged opposite to the main mold groove 6. The push rod 19 is fixedly connected to the piston rod of the electric push rod 18.

[0030] Driven by the electric push rod 18, the ejector rod 19 can eject the formed rivet from the main die groove 6 to achieve automatic unloading.

[0031] In order to further improve the stability of the rotation of the turntable 5, two universal balls 23 are installed on the side of the first fixed plate 2 close to the bottom main mold groove 6. The universal balls 23 roll in coordination with the turntable 5. The universal balls 23 can support the force application point of the impact module 22 to ensure the stability of the turntable 5.

[0032] Working principle: The rivet material to be formed is inserted into the top main die groove 6. The operation of the first motor 4 can drive the first rotating shaft 3 to rotate, so as to better drive the turntable 5 and the rivet material inside it to rotate. When the turntable 5 rotates toward the baffle 8, the baffle 8 can prevent the rivet material from slipping. When the rivet material moves to the bottom, the cylinder 20 operates to control the extension of the piston rod and contacts the end plate 17. The moving end plate 17 pushes the punch module 22 to the side of the turntable 5 through the slide rod 16. The punch module 22 applies pressure to the rivet material, thereby realizing cold heading forming. The continuous rotation of the turntable 5 causes the formed rivet to move to the push rod 19. Under the drive of the electric push rod 18, the push rod 19 can eject the formed rivet from the main die groove 6, realizing automatic unloading and achieving efficient and precise forming of rivets.

[0033] When the punching module 22 needs to be replaced, the second motor 12 accurately controls the rotation of the exchange disk 11 through the transmission of the worm 14 and the worm gear 15, so that the punching module 22 to be used is moved to the side of the cylinder 20 to complete the replacement work. The replacement work of the punching module 22 is more convenient and practical.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A rivet cold heading die, characterized in that: The invention comprises a base plate (1) and a first fixed plate (2) fixedly connected to the base plate (1), a rotatable turntable (5) is provided on one side of the first fixed plate (2), a plurality of main die grooves (6) are evenly provided inside the turntable (5), a second fixed plate (9) is fixedly connected to the top of the base plate (1) and located on one side of the first fixed plate (2), a second rotating shaft (10) is rotatably connected inside the second fixed plate (9), a switching disk (11) is fixedly connected on the side of the second rotating shaft (10) close to the turntable (5), a cylinder (20) is fixedly connected on the side of the second fixed plate (9) close to the switching disk (11) and located above the second rotating shaft (10), and a plurality of punching module assemblies are evenly provided on the switching disk (11); The punching module assembly includes a slide rod (16) slidably connected to the inside of the exchange disk (11), an end plate (17) fixedly connected to the slide rod (16) near one end of the cylinder (20), a spring (21) sleeved on the outside of the slide rod (16) and a punching module (22) fixedly connected to the slide rod (16) near one end of the turntable (5), the piston rod of the cylinder (20) is close to the end plate (17), the punching module (22) is close to the bottom main die groove (6), and a control component for driving the second rotating shaft (10) to rotate is provided on one side of the second fixed plate (9).

2. A rivet cold heading die according to claim 1, characterized in that: A blanking assembly is provided on a side of the first fixed plate (2) away from the turntable (5), the blanking assembly comprising an electric push rod (18) fixedly connected to one side of the first fixed plate (2) and a push rod (19) inserted into the interior of the first fixed plate (2) and arranged opposite to the main mold groove (6), the push rod (19) being fixedly connected to the piston rod of the electric push rod (18).

3. A rivet cold heading die according to claim 2, characterized in that: A first rotating shaft (3) fixedly connected to the turntable (5) is rotatably connected inside the first fixed plate (2); a first motor (4) is fixedly connected to the side of the first fixed plate (2) away from the turntable (5); and an end of the first rotating shaft (3) close to the first motor (4) is fixedly connected to the output shaft of the first motor (4).

4. A rivet cold heading die according to claim 3, characterized in that: An L-shaped mounting frame (7) is fixedly connected to the side of the first fixed plate (2) opposite to the push rod (19), and a semi-circular ring baffle (8) is fixedly connected to the mounting frame (7). A gap is set between the baffle (8) and the turntable (5) and the baffle is located between the uppermost main mold groove (6) and the lowermost main mold groove (6).

5. A rivet cold heading die according to claim 4, characterized in that: The control assembly comprises a second motor (12) fixedly connected to the top of the base plate (1), a third rotating shaft (13) fixedly connected to the output shaft of the second motor (12), a worm gear (15) fixedly connected to the end of the second rotating shaft (10), and a worm (14) fixedly connected to the top of the third rotating shaft (13) and meshingly connected to the worm gear (15).

6. A rivet cold heading die according to claim 5, characterized in that: Two universal balls (23) are installed on one side of the first fixed plate (2) close to the bottom main die groove (6), and the universal balls (23) roll in cooperation with the turntable (5).

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