High speed cold header

Abstract

The present application relates to cold header technical field, specifically to a kind of high-speed cold header, including cold heading action component, fixed frame and moving frame, the moving frame is connected with external transmission component, multiple cold heading dies are fixedly installed in the fixed frame, multiple material ejecting components are fixedly installed in the side of the moving frame corresponding to cold heading die, the side of the fixed frame is fixedly installed with elastic air bag, the outside of the elastic air bag is fixedly installed with extrusion plate, the extrusion plate is slid on fixed frame by slide rod, gas pipe is installed through on the elastic air bag, by setting the material ejecting component that can be gas and simultaneously move, the gap between blank and cold heading die can be increased first, promote blank to first separate and the close connection between cold heading die, then it is ejected by the movement of ejector rod, make its friction with cold heading die reduce in the process of material removal, reduce the debris generated by blank under friction, and cooperate with continuous air and oil, let material removal be more smoothly.

Description

Technical Field

[0001] This invention relates to the field of cold heading machine technology, and specifically to a high-speed cold heading forming machine. Background Technology

[0002] Cold heading machines are specialized equipment used for mass production of fasteners such as nuts and bolts, with the main function of heading. Based on the theory of metal plastic deformation, a certain pressure is applied to the metal billet at room temperature, causing it to undergo plastic deformation in the mold cavity and be formed into a specified shape and size. The cold heading process is suitable for products with large batches and various specifications, which can reduce costs.

[0003] During cold heading, the metal billet undergoes rapid deformation in a short period of time, forming the required shape within the mold. This rapid deformation makes the metal billet prone to producing debris upon impact. The presence of small debris within the mold increases the friction between the metal billet and the mold. Furthermore, the accumulation of these small debris can cause the metal billet to become stuck in the mold and difficult to eject, or to be scratched during ejection, resulting in defective products and damage to the mold. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a high-speed cold heading forming machine, which can effectively solve the problem of metal billets getting stuck in the mold in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The present invention provides a high-speed cold heading forming machine, including a cold heading action component, a fixed frame and a movable frame. The movable frame is connected to an external transmission component. Multiple cold heading dies are fixedly installed inside the fixed frame. Multiple ejector components are fixedly installed on one side of the movable frame corresponding to the cold heading dies.

[0007] The fixed frame includes an elastic airbag fixedly installed on one side, a compression plate fixedly installed on the outer side of the elastic airbag, the compression plate sliding on the fixed frame via a sliding rod, an air outlet pipe extending through the elastic airbag and fixedly connected to the compression plate, and a top material assembly including multiple movable cylinders fixedly installed on one side of a movable frame, the movable frame being connected to an external transmission component, a movable ring slidably installed inside the movable cylinder, a spring fixedly connected between the movable ring and its side wall, a top rod fixedly installed on the inner side wall of the movable ring, the top rod having multiple spray holes, the top rod communicating with the inside of the movable cylinder, a connecting pipe extending through the movable cylinder, the connecting pipe corresponding one-to-one with the air outlet pipe, and a compression ring fixedly installed on the outer wall of the connecting pipe.

[0008] Furthermore, a powerful magnetic ring is embedded and fixedly installed inside the movable cylinder, and the movable ring is a metal ring.

[0009] Furthermore, an oil storage box is fixedly installed on one side of the movable empty cylinder, and an elastic bladder is fixedly installed on one side of the movable ring.

[0010] Furthermore, multiple oil outlet pipes are installed through the bottom of the elastic bladder, with one end of each oil outlet pipe extending to the nozzle at the foremost end of the movable empty cylinder.

[0011] Furthermore, a connecting pipe is installed through the elastic bladder, a connecting groove is opened on the side plate of the movable empty cylinder, a micro water pump is placed in the oil storage box and the pipe of the micro water pump is connected to the connecting groove, and the connecting pipe is used to be inserted into the connecting groove and connected to the micro water pump.

[0012] Furthermore, a slot is provided inside the movable cylinder, and the slot communicates with the spray hole. A turbofan is fixedly connected to the slot through a connecting frame.

[0013] Furthermore, an elastic ring is embedded and fixedly installed on the movable empty cylinder. The elastic ring is located close to the cold heading die and is used to expand and fit tightly against the inner wall of the cold heading die.

[0014] The technical solution provided by this invention has the following advantages compared with known public technologies:

[0015] This invention, by setting up an ejector assembly that can vent air and move simultaneously, can first increase the gap between the billet and the cold heading die, causing the billet to detach from the tight connection with the cold heading die first. Then, by moving the ejector rod, it is ejected, reducing the friction between the billet and the cold heading die during the unloading process, reducing the debris generated by the billet under friction, and with continuous air and oil venting, the unloading process is made smoother. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the fixing frame of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the top material assembly and the elastic airbag of the present invention;

[0020] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the internal structure of the top material assembly of the present invention.

[0022] The labels in the diagram represent: 1. Cold heading action assembly; 2. Fixed frame; 3. Ejector assembly; 301. Moving cylinder; 302. Moving ring; 303. Ejector rod; 304. Spray nozzle; 305. Elastic bladder; 306. Oil outlet pipe; 307. Connecting pipe; 308. Connecting groove; 309. Oil reservoir; 310. Turbine fan; 311. Strong magnetic ring; 312. Elastic ring; 4. Cold heading die; 5. Moving frame; 6. Elastic air bladder; 7. Extrusion plate; 8. Air outlet pipe; 9. Connecting pipe; 10. Extrusion ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] The present invention will be further described below with reference to embodiments.

[0025] Example:

[0026] Reference Figures 1 to 5 A high-speed cold heading forming machine includes a cold heading action component 1, a fixed frame 2 and a movable frame 5. The movable frame 5 is connected to an external transmission component. Multiple cold heading dies 4 are fixedly installed inside the fixed frame 2. Multiple ejector components 3 are fixedly installed on one side of the movable frame 5 corresponding to the cold heading dies 4.

[0027] The fixed frame 2 has an elastic airbag 6 fixedly installed on one side, and a compression plate 7 fixedly installed on the outer side of the elastic airbag 6. The compression plate 7 slides on the fixed frame 2 via a sliding rod. An air outlet pipe 8 is installed through the elastic airbag 6 and extends to the outside of the compression plate 7 and is fixedly connected to the compression plate 7. The top material assembly 3 includes multiple movable empty cylinders 301 fixedly installed on one side of the movable frame 5. The movable frame 5 is connected to an external transmission component. A movable ring 302 is slidably installed inside the movable empty cylinder 301. A spring is fixedly connected between the movable ring 302 and its side wall. A top rod 303 is fixedly installed on the inner side wall of the movable ring 302. Multiple spray holes 304 are opened on the top rod 303. The top rod 303 communicates with the inside of the movable empty cylinder 301. A connecting pipe 9 is installed through the movable empty cylinder 301. The connecting pipe 9 corresponds one-to-one with the air outlet pipe 8. A compression ring 10 is fixedly installed on the outer wall of the connecting pipe 9.

[0028] When the cold heading machine is working, the blank to be cold-headed needs to be placed into the cold heading die 4. The cold heading action component 1, driven by the transmission component, impacts into the cold heading die 4, pushing the blank into the cold heading die 4 to form the required shape. The moving frame 5 is also connected to the external transmission component. After the blank is stamped, the cold heading action component 1 returns to its original position, and the moving frame 5, driven by the transmission component, pushes into the cold heading die 4 to push out the blank inside. It should be noted that the transmission component is existing technology, or it may use a motor to provide power and transmit power through a connecting rod to drive the cold heading action component 1 or the moving frame 5 to move. Its working principle will not be described here, and it is not shown in the figure.

[0029] When the moving frame 5 pushes into the cold heading die 4, the moving empty cylinder 301 will directly insert into the cold heading die 4 and block the port of the cold heading die 4. During this process, the connecting pipe 9 on the moving empty cylinder 301 will be inserted into the air outlet pipe 8. As the moving empty cylinder 301 continues to move, the compression ring 10 on the connecting pipe 9 will compress the air outlet pipe 8 and move it, and together with the compression plate 7, compress the elastic air bag 6, transferring the gas in the elastic air bag 6 to the moving empty cylinder 301 through the connecting pipe 9. The air pressure pushes the moving ring 302, which in turn moves the ejector rod 303 outward. Simultaneously, some air pressure escapes through the nozzle 304 on the ejector rod 303. This air pressure is then transmitted to the cold heading die 4 via the ejector rod 303. At this time, one side of the cold heading die 4 is blocked by the cold-headed blank, and the other side is blocked by the moving empty cylinder 301. Simultaneously, the moving empty cylinder 301 also moves into the cold heading die 4. The air pressure escaping from the nozzle 304 squeezes the blank inside the cold heading die 4, pushing it towards the cold heading stage through gas pressure. The mold 4 slides externally, increasing the gap between the blank and the inner wall of the cold heading mold 4. Simultaneously, due to the small gap in the nozzle 304, the air pressure is not released excessively through the nozzle 304. The moving ring 302 is stably driven by pressure, moving the ejector pin 303 outwards. This allows the blank to be extruded more easily from the cold heading mold 4, reducing friction between the blank and the cold heading mold 4, and reducing debris generated by friction. During this process, the ejector pin 303 also continuously moves and pushes against the... The air pressure ejects the blank, pushing out the loose blank that was already inside the cold heading die 4, thus completing the ejection of the blank. At the same time, during the ejection process, the inclined nozzles 304 blow against the inner wall of the cold heading die 4, blowing out any debris that may appear inside the cold heading die 4. This prevents the blank from coming into contact with debris when it enters the cold heading die 4 again, increases the friction between the blank and the cold heading die 4, and thus keeps the inside of the cold heading die 4 relatively clean, which helps the blank to be removed from the cold heading die 4.

[0030] Specifically, refer to Figures 1 to 5 The movable empty cylinder 301 is embedded with a strong magnetic ring 311, and the movable ring 302 is a metal ring.

[0031] When the moving ring 302 is pushed by pressure, its speed increases rapidly. When the moving ring 302 moves onto the strong magnetic ring 311, the rapidly moving ring 302 directly cuts into the magnetic field of the strong magnetic ring 311, cutting the magnetic field lines of the strong magnetic ring 311. This generates eddy currents within the moving ring 302, causing a delay in its movement. It is important to note that this delay only limits the moving speed of the moving ring 302, not that the moving ring 302 completely stops moving. At this point, due to the limited movement speed of the moving ring 302... The temperature is greatly reduced, and more gas pressure will be released into the cold heading die 4 through the nozzle 304. During the process of the ejector rod 303 entering the cold heading die 4, the billet can fully detach from the contact with the cold heading die 4, so that the ejector rod 303 can smoothly eject the billet. At the same time, after the moving ring 302 leaves the magnetic field range of the strong magnetic ring 311, the moving ring 302 can continue to return to its original speed, and can stably eject the billet with the ejector rod 303. Among them, the moving ring 302 is best made of copper because copper has better conductivity and the eddy current generated by the magnetic field in copper is stronger.

[0032] Specifically, refer to Figures 1 to 5 An oil storage box 309 is fixedly installed on one side of the movable empty cylinder 301, and an elastic bladder 305 is fixedly installed on one side of the movable ring 302.

[0033] Specifically, refer to Figures 1 to 5 Multiple oil outlet pipes 306 are installed through the bottom of the elastic bladder 305, and one end of the oil outlet pipe 306 extends to the nozzle 304 at the foremost end of the movable empty cylinder 301.

[0034] During the movement, the elastic bladder 305 is first squeezed by the gas pressure and transmitted to the moving ring 302. The elastic bladder 305 squeezed by the gas pressure will squeeze out the lubricating oil inside and flow through the oil outlet pipe 306 to the nozzle 304. At this time, the airflow escaping from the nozzle 304 will blow away the lubricating oil flowing to the nozzle 304 and blow it into the interior of the cold heading die 4, covering the inner wall of the cold heading die 4 with lubricating oil. This will make it easier for the blank to be ejected from the cold heading die 4 after the next blank enters the cold heading die 4, further improving the efficiency of blank ejection and the yield rate of blank ejection.

[0035] The oil outlet pipe 306, located near the frontmost nozzle 304, can spray lubricating oil into the cold heading die 4 after the ejector rod 303 extends into the cold heading die 4, and can completely spray lubricating oil onto the inner wall of the cold heading die 4.

[0036] Specifically, refer to Figures 1 to 5A connecting pipe 307 is installed through the elastic bladder 305. A connecting groove 308 is provided on the side plate of the movable empty cylinder 301. A micro water pump is placed in the oil storage box 309 and the pipe of the micro water pump is connected to the connecting groove 308. The connecting pipe 307 is used to be inserted into the connecting groove 308 and connected to the micro water pump.

[0037] Specifically, refer to Figures 1 to 5 The movable empty cylinder 301 has a slot, which is connected to the spray hole 304. A turbo fan 310 is fixedly connected to the slot through a connecting frame.

[0038] In the non-operating state, the connecting pipe 307 remains inserted in the connecting slot 308, and through the action of a micro water pump, pumps the oil in the oil storage box 309 into the elastic bladder 305, replenishing the elastic bladder 305 with oil. After the moving ring 302 and the elastic bladder 305 begin to move, the connecting pipe 307 disengages. Simultaneously, as the airflow passes through the slot of the moving cylinder 301, it drives the turbofan 310 to rotate. It should be noted that when the moving ring 302 experiences sluggish movement due to magnetic damping, the airflow passes through the slot of the moving cylinder 301 more rapidly and is ejected outward through the nozzle 304. At this time, the turbofan 310 experiences greater pressure, and the rotation speed of the moving ring 302 will be faster. Within the width range of the powerful magnetic ring 311, the rapid rotation of the push rod 303 can throw the lubricating oil dripping into the slot of the moving cylinder 301. The airflow is carried on the side wall of the slot of the moving empty cylinder 301 and escapes from the nozzle 304 during the flow process. At the same time, it is dispersed by the airflow into the cold heading die 4. During this process, the lubricating oil in the cold heading die 4 is replenished more evenly. Meanwhile, after the moving ring 302 moves to the inner wall of the moving empty cylinder 301 and is blocked, the transmission component continues to push the moving frame 5, which allows the elastic airbag 6 to continuously add gas into the moving empty cylinder 301. At this time, the moving ring 302 is blocked by the inner wall of the moving empty cylinder 301, and the airflow can only escape through the nozzle 304 on the slot of the moving empty cylinder 301. At this time, the ejector rod 303 will also rotate rapidly. In this state, the blank has been ejected. With the continuous deepening of the moving empty cylinder 301 and the rapid rotation of the ejector rod 303, the inner wall near the port of the cold heading die 4 can be continuously blown and lubricated, achieving a better effect of cleaning debris and replenishing lubricating oil.

[0039] Specifically, refer to Figures 1 to 5 An elastic ring 312 is embedded and fixedly installed on the movable empty cylinder 301. The elastic ring 312 is located close to the cold heading die 4 and is used to expand and stick to the inner wall of the cold heading die 4.

[0040] During the movement of the moving ring 302, the gas on one side of the moving ring 302 is compressed, which forces the elastic ring 312 to expand. When the elastic ring 312 expands, since the moving cylinder 301 is already inside the cold heading die 4, the expanded elastic ring 312 will stick tightly to the inner wall of the cold heading die 4, improving the sealing of one end of the cold heading die 4. At the same time, during the reset process of the moving cylinder 301, the elastic ring 312 will also slowly return to its original shape along with the slow reset of the push rod 303, while rubbing against the inner wall of the cold heading die 4, spreading the lubricating oil on the inner wall of the cold heading die 4.

[0041] Working principle: When the moving frame 5 pushes into the cold heading die 4, the moving empty cylinder 301 will directly insert into the cold heading die 4 and block the port of the cold heading die 4. During this process, the connecting pipe 9 on the moving empty cylinder 301 will be inserted into the air outlet pipe 8. As the moving empty cylinder 301 continues to move, the extrusion ring 10 on the connecting pipe 9 will extrude the air outlet pipe 8 and move it, and together with the extrusion plate 7, extrude the elastic air bag 6, and transfer the gas in the elastic air bag 6 to the moving empty cylinder 301 through the connecting pipe 9. The air pressure pushes the moving ring 302, which in turn moves the ejector rod 303 outward. Simultaneously, some air pressure escapes through the nozzle 304 on the ejector rod 303. This air pressure is then transmitted to the cold heading die 4 via the ejector rod 303. At this time, one side of the cold heading die 4 is blocked by the cold-headed blank, and the other side is blocked by the moving cylinder 301. Simultaneously, the moving cylinder 301 is also moving into the cold heading die 4. The air pressure escaping from the nozzle 304 squeezes the blank inside the cold heading die 4, pushing it forward through the gas pressure. The cold heading die 4 slides externally, increasing the gap between the blank and the inner wall of the cold heading die 4. Simultaneously, due to the small gap in the nozzle 304, the air pressure is not released excessively through the nozzle 304. The moving ring 302 is stably driven by pressure and moves the ejector rod 303 outwards. This allows the blank to be extruded more easily from the cold heading die 4, reducing friction between the blank and the cold heading die 4 and reducing debris generated by friction. During this process, the ejector rod 303 also continuously moves and pushes against the surface. The blank that has been ejected by air pressure will push out the blank that has been loosened in the cold heading die 4, thus completing the work of ejecting the blank. At the same time, during the ejection process, the inclined nozzles 304 will blow against the inner wall of the cold heading die 4, blowing out any debris that may appear in the cold heading die 4, preventing the blank from coming into contact with debris when it enters the cold heading die 4 again, increasing the friction between the blank and the cold heading die 4, thus keeping the inside of the cold heading die 4 relatively clean, and helping the blank to be removed from the cold heading die 4.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-speed cold heading forming machine, comprising a cold heading action assembly (1), a fixed frame (2), and a movable frame (5), wherein the movable frame (5) is connected to an external transmission assembly, characterized in that, Multiple cold heading dies (4) are fixedly installed inside the fixed frame (2), and multiple ejector components (3) are fixedly installed on one side of the movable frame (5) corresponding to the cold heading dies (4); wherein, an elastic airbag (6) is fixedly installed on one side of the fixed frame (2), and an extrusion plate (7) is fixedly installed on the outside of the elastic airbag (6). The extrusion plate (7) slides on the fixed frame (2) via a slide rod. An air outlet pipe (8) is installed through the elastic airbag (6). The air outlet pipe (8) extends to the outside of the extrusion plate (7) and is fixedly connected to the extrusion plate (7). The ejector component (3) includes multiple movable empty cylinders (30) fixedly installed on one side of the movable frame (5). 1) The movable frame (5) is connected to an external transmission component. A movable ring (302) is slidably installed inside the movable cylinder (301). A spring is fixedly connected between the movable ring (302) and the side wall of the movable ring (302). A top rod (303) is fixedly installed on the inner side wall of the movable ring (302). Multiple spray holes (304) are opened on the top rod (303). The top rod (303) communicates with the inside of the movable cylinder (301). A connecting pipe (9) is installed through the movable cylinder (301). The connecting pipe (9) corresponds one-to-one with the air outlet pipe (8). A compression ring (10) is fixedly installed on the outer wall of the connecting pipe (9). The movable cylinder (301) is inserted into the cold heading die (4) during the ejection stroke and blocks the port of the cold heading die (4); the connecting pipe (9) is inserted into the air outlet pipe (8) to form an insertion air passage; the extrusion ring (10) extrudes the air outlet pipe (8) during the advancement of the movable cylinder (301) and drives the extrusion plate (7) to compress the elastic air bag (6), so that the gas enters the movable cylinder (301) through the connecting pipe (9) and escapes from the spray hole (304); the spray hole (304) is inclined and is used to blow along the inner wall of the mold cavity of the cold heading die (4); An oil storage box (309) is fixedly installed on one side of the movable empty cylinder (301), and an elastic bladder (305) is fixedly installed on one side of the movable ring (302).

2. The high-speed cold heading forming machine according to claim 1, characterized in that, A powerful magnetic ring (311) is embedded and fixedly installed inside the movable empty cylinder (301), and the movable ring (302) is a metal ring.

3. The high-speed cold heading forming machine according to claim 2, characterized in that, Multiple oil outlet pipes (306) are installed through the bottom of the elastic bladder (305), and one end of the oil outlet pipe (306) extends to the nozzle (304) at the foremost end of the movable empty cylinder (301).

4. A high-speed cold heading forming machine according to claim 3, characterized in that, A connecting pipe (307) is installed through the elastic bladder (305), a connecting groove (308) is provided on the side plate of the movable empty cylinder (301), a micro water pump is placed in the oil storage box (309) and the pipe of the micro water pump is connected to the connecting groove (308), and the connecting pipe (307) is used to be inserted into the connecting groove (308) and connected to the micro water pump.

5. A high-speed cold heading forming machine according to claim 4, characterized in that, The movable empty cylinder (301) has a slot, which is connected to the nozzle (304). A turbo fan (310) is fixedly connected to the slot through a connecting frame.

6. A high-speed cold heading forming machine according to claim 5, characterized in that, An elastic ring (312) is embedded and fixedly installed on the movable empty cylinder (301). The elastic ring (312) is located close to the cold heading die (4). The elastic ring (312) is used to expand and stick to the inner wall of the cold heading die (4).

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