Cold header for fastener production

Abstract

The invention provides a cold header for fastener production, and belongs to the technical field of cold headers. Comprising a cold heading head, a cold heading base and a conveying unit, and the conveying unit is used for conveying cold heading workpieces and connected with the cold heading head and the cold heading base. By arranging the conveying unit, the cold heading workpiece can be automatically conveyed to the position of the next cold heading hole, and the conveying unit runs without an additional driving source, so that the cost of the cold heading machine is reduced, the processing efficiency of the cold heading machine on the cold heading workpiece is ensured, the yield is increased, and the production cost is reduced. The conveying unit can automatically lubricate the cold heading workpiece, the first cold heading die and the second cold heading die, the problems of galling, scratching and the like of the cold heading workpiece in the cold heading process are effectively prevented, the surface smoothness and the size precision of the workpiece are improved, and after the first cold heading die and the second cold heading die are lubricated, the dies can be protected, and the production efficiency is improved. The metal surface of the die can be prevented from being oxidized or corroded, and the service life of the die is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of cold heading machines, in particular to a cold heading machine for fastener production. Background Art

[0002] Cold heading process is one of the new metal pressure processing processes with little cutting. It is a processing method that utilizes the plastic deformation of metal under the action of external force and uses the mold to redistribute and transfer the metal volume to form the required parts or blanks. The cold heading process is most suitable for the production of standard fasteners such as bolts, screws, nuts, rivets, pins, etc. The commonly used equipment for cold heading process is a special cold heading machine.

[0003] When the cold heading machine is in use, multiple cold heading workpieces are cold headed on the cold heading machine body through multiple cold heading heads. After the cold heading is completed, the multiple cold heading workpieces are synchronously moved out and moved to the next cold heading hole for the next step of operation. The operation can be repeated to complete the cold heading process for the cold heading workpieces. When the cold heading workpieces are transported, the cold heading workpieces are moved by cooperating with a driving source. Therefore, after the cold heading is completed, the unloading equipment needs to completely push out the cold heading workpieces, and then the cold heading workpieces are transported by the conveying equipment. Therefore, time is required for transportation, which increases the cold heading time and reduces the cold heading efficiency. Therefore, in order to improve the efficiency of conveying the cold heading workpieces during the cold heading process, the present invention provides a cold heading machine for fastener production to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a cold heading machine for fastener production, which can automatically convey the cold heading workpiece to the next cold heading hole position by setting a conveying unit, and the operation of the conveying unit does not require an additional driving source. Such a setting not only reduces the cost of the cold heading machine, but also ensures the efficiency of the cold heading machine in processing the cold heading workpiece and improves the output. The conveying unit can automatically lubricate the cold heading workpiece, the first cold heading die and the second cold heading die. After lubricating the cold heading workpiece, it can effectively prevent the cold heading workpiece from being burred, scratched and other problems during the cold heading process, thereby improving the surface finish and dimensional accuracy of the workpiece. After lubricating the first cold heading die and the second cold heading die, it can not only protect the mold, but also prevent the metal surface of the mold from oxidation or corrosion, thereby improving the service life of the mold. The above setting can solve the problem of low efficiency of conveying cold heading workpieces in cold heading machines at this stage.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A cold heading machine for fastener production comprises a cold heading head and a cold heading seat, wherein a first cold heading die and a discharge chuck are fixedly connected to a side of the cold heading head close to the cold heading seat, a second cold heading die and a feed tube are fixedly connected to a side of the cold heading seat away from the cold heading head, a cold heading hole corresponding to the position of the second cold heading die is opened on the other side of the cold heading seat, and a retention area is fixedly connected between two adjacent cold heading holes; a conveying unit, wherein the conveying unit is used to convey the cold heading workpiece, and the conveying unit is respectively connected to the cold heading head and the cold heading seat.

[0006] Optionally, the conveying unit includes a conveying plate slidably connected to the cold heading seat, the conveying plate is fixedly connected to a second pressure plate at one end close to the feed barrel, the other end of the conveying plate is fixedly connected to a connecting plate, a return spring is fixedly connected to the cold heading seat, one end of the return spring is fixed to the cold heading seat and the other end is in contact with the connecting plate, the conveying unit also includes a first pressure plate fixedly connected to the cold heading head and corresponding to the position of the second pressure plate.

[0007] Optionally, there are two conveying plates, and the two conveying plates are respectively located on both sides of the cold heading hole. A plurality of arc plates arranged linearly are fixedly connected to the conveying plate, and the arc plates have a semicircular profile. Baffles are fixedly connected to the arc plates and the conveying plates.

[0008] Optionally, the first pressing plate and the second pressing plate both have triangular profiles, and two inclined surfaces of the first pressing plate and the second pressing plate fit each other.

[0009] Optionally, lubrication cavities are provided in the conveying plate, the arc plate and the second pressure plate, oil outlet holes connected to the lubrication cavities are provided at the bottom of the arc plate and the inclined surface of the second pressure plate, and a reflux groove is provided at the bottom of the inclined surface of the second pressure plate.

[0010] Optionally, the cold heading seat is fixedly connected to an oil storage tank at one end away from the feed cylinder, an oil inlet pipe is fixedly connected to the top outer wall of the oil storage tank, a piston rod is inserted in the oil storage tank, one end of the piston rod is inserted in the oil storage tank and the other end is fixedly connected to the cold heading head.

[0011] Optionally, an oil pipeline is fixedly connected to the bottom outer wall of the oil storage tank, a first one-way valve is fixedly connected to the oil pipeline, one end of the oil pipeline is fixedly connected to two hoses, and the two hoses are respectively fixed to the two connecting plates.

[0012] Optionally, a return pipe is fixedly connected to the bottom end of the oil storage tank, a second one-way valve is fixedly connected to the return pipe, one end of the return pipe is fixedly connected to a collecting pipe, the collecting pipe is staggered and wound around the outer wall of the second cold heading die, one end of the collecting pipe is connected to the return pipe, and the other end is fixedly connected to the feed barrel, and the collecting pipe is connected to each of the second cold heading dies.

[0013] Optionally, a pushing mechanism is installed at one end of the second cold heading die away from the cold heading hole, and the pushing mechanism is used to push the cold heading workpiece out of the second cold heading die.

[0014] Optionally, the discharge chuck is a mechanical clamping mechanism for removing the cold-forging workpiece that has been cold-forging from the cold-forging seat.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a conveying unit, when the cold heading workpiece is processed in a cold heading hole, the conveying unit can automatically convey the cold heading workpiece to the next cold heading hole position, and the operation of the conveying unit does not require an additional driving source. Such a setting not only reduces the cost of the cold heading machine, but also ensures the efficiency of the cold heading machine in processing the cold heading workpiece and improves the output. In addition, the conveying unit can automatically lubricate the cold heading workpiece, the first cold heading die and the second cold heading die. After lubricating the cold heading workpiece, it can effectively prevent the cold heading workpiece from being burred, scratched and other problems during the cold heading process, thereby improving the surface finish and dimensional accuracy of the workpiece. After lubricating the first cold heading die and the second cold heading die, it can not only protect the mold, but also prevent the metal surface of the mold from oxidation or corrosion, thereby improving the service life of the mold.

[0016] By setting a conveying plate and an arc plate, when the cold heading head moves toward the cold heading seat, the first pressure plate will squeeze the second pressure plate, thereby driving the conveying plate as a whole to slide on the cold heading seat. During the sliding of the conveying plate, the arc plate will push the cold heading workpiece at the position of the cold heading hole to the retention area, wherein baffles are installed on the arc plate and the conveying plate to block and limit the cold heading workpiece, and the cold heading workpiece can be blocked and limited in all directions, thereby preventing the cold heading workpiece from being offset and misaligned during the conveying process. When the cold heading workpiece is processed in a cold heading hole, the cold heading head will move away When the cold heading head moves toward the cold heading seat again, the arc plate will push the cold heading workpiece to the retention area again. At this time, the cold heading workpiece originally staying in the retention area will be pushed into the cold heading hole by the new cold heading workpiece. The automatic transportation of all cold heading workpieces can be completed by this reciprocating operation. This transportation method uses the mutual movement of the cold heading head and the cold heading seat to automatically realize the transportation function of the cold heading workpiece, save energy and machine costs, and ensure the efficiency of cold heading workpiece transportation.

[0017] By setting up an oil storage tank, when the cold heading head moves toward the cold heading seat, the piston rod will squeeze the lubricating oil in the oil storage tank. At this time, the lubricating oil in the oil storage tank will flow out from the oil pipe under the squeezing action of the piston rod, and the lubricating oil that flows out will be transported to the bottom of the arc plate and the oil outlet position on the inclined surface of the second pressure plate through the lubrication cavity. The lubricating oil that flows out from the bottom of the arc plate will enter the cold heading hole in the process of the arc plate sliding through the cold heading hole, and will also be flattened on the cold heading seat in the process of the arc plate sliding. This kind of setting can not only reduce the friction between the conveying plate and the arc plate and the cold heading seat, but also reduce the friction between the conveying plate and the arc plate and the cold heading seat. The lubricating oil flowing out from the inclined surface of the second pressing plate can lubricate the second pressing plate. When the first pressing plate and the second pressing plate are squeezed against each other, the lubricating oil can lubricate the two pressing plates, thereby effectively preventing the two pressing plates from being scratched or scratched during the cold heading process, improving the surface finish and dimensional accuracy of the workpiece, and at the same time, lubricating the first cold heading die and the second cold heading die can also be lubricated, thereby protecting the two pressing plates from oxidation or corrosion of the metal surface and improving the service life of the two pressing plates. The lubricating oil flowing out from the inclined surface of the second pressing plate can lubricate the second pressing plate. When the first pressing plate and the second pressing plate are squeezed against each other, the lubricating oil can lubricate the two pressing plates, thereby reducing the wear of the two pressing plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a cold heading machine for fastener production from the first perspective; Figure 2 This is a schematic diagram of the third dimension structure of a cold heading machine for fastener production from the second perspective; Figure 3 It is an enlarged three-dimensional structural diagram of the cold heading base and the conveying unit; Figure 4 It is a schematic diagram of the enlarged three-dimensional structure of the conveying plate; Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the conveying plate; Figure 6 It is an enlarged three-dimensional structural diagram of the cold heading head, cold heading seat and conveying unit; Figure 7 for Figure 6 A in the middle is an enlarged schematic diagram of the three-dimensional structure; Figure 8 It is a schematic diagram of the cross-sectional three-dimensional structure of the cold heading base and the conveying unit; Fig. 9 It is a schematic diagram of the first-person perspective three-dimensional structure of the cold heading seat, conveying unit and oil storage tank; Fig.10It is a schematic diagram of the three-dimensional structure of the cold heading base, conveying unit and oil storage tank in a cross-sectional view from the second perspective.

[0020] Reference numerals: 1. Cold heading head; 101. First cold heading die; 102. Discharging chuck; 103. First pressing plate; 104. Piston rod; 2. Cold heading seat; 201. Feeding barrel; 202. Second cold heading die; 203. Cold heading hole; 204. Retention area; 205. Return spring; 3. Conveying plate; 301. Arc plate; 302. Baffle; 303. Second pressing plate; 304. Connecting plate; 305. Lubrication cavity; 306. Oil outlet; 4. Oil storage tank; 401. Oil inlet pipe; 402. Oil delivery pipe; 403. First one-way valve; 404. Hose; 405. Return pipe; 406. Second one-way valve; 407. Collecting pipe.

[0021] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0022] The following is a detailed description of a cold heading machine for fastener production provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0023] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0024] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0025] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0026] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0027] like Figures 1 to 3 As shown, an embodiment of the present invention provides a cold heading machine for fastener production, comprising a cold heading head 1 and a cold heading seat 2, wherein a first cold heading die 101 and a discharge clamp 102 are fixedly connected to one side of the cold heading head 1 close to the cold heading seat 2, and a second cold heading die 202 and a feed barrel 201 are fixedly connected to one side of the cold heading seat 2 away from the cold heading head 1, and a cold heading hole 203 corresponding to the position of the second cold heading die 202 is opened on the other side of the cold heading seat 2, and two adjacent cold heading holes 203 are connected to each other. A retention area 204 is fixedly connected between the holes 203; a conveying unit, the conveying unit is used to convey the cold heading workpiece, the conveying unit is respectively connected to the cold heading head 1 and the cold heading seat 2, and a pushing mechanism is installed at one end of the second cold heading die 202 away from the cold heading hole 203, the pushing mechanism is used to push the cold heading workpiece out of the second cold heading die 202, and the discharge clamp 102 is a mechanical clamping mechanism, which is used to take the cold heading workpiece that has been cold headed out from the cold heading seat 2.

[0028] The cold heading machine provided in the present application is a horizontal cold heading machine, in which the cold heading head 1 is controlled by a hydraulic component. When the cold heading machine is running, the cold heading head 1 will move toward the cold heading seat 2 under the driving action of the hydraulic component. The cold heading seat 2 is fixed on the cold heading machine body and does not move. The cold heading workpiece is conveyed from the feeding tube 201 to the cold heading seat 2, and then conveyed to the cold heading hole 203 through the conveying unit, and finally passes through the first cold heading die 101 and the second cold heading die 202 for cold heading treatment. The processed cold heading workpiece is pushed to the cold heading seat 2 by the pushing mechanism, and then conveyed to the next cold heading hole 203 through the conveying unit for reprocessing. The cold heading workpiece that has completed the cold heading treatment is finally taken out through the discharge clamp 102; by setting the conveying unit, when the cold heading workpiece is in a cold heading hole 203 After processing is completed, the conveying unit can automatically convey the cold heading workpiece to the next cold heading hole 203 position, and the operation of the conveying unit does not require an additional driving source. Such a setting not only reduces the cost of the cold heading machine, but also ensures the efficiency of the cold heading machine in processing the cold heading workpiece and improves production. In addition, the conveying unit can automatically lubricate the cold heading workpiece, the first cold heading die 101 and the second cold heading die 202. After lubricating the cold heading workpiece, it can effectively prevent the cold heading workpiece from being burred, scratched and other problems during the cold heading process, thereby improving the surface finish and dimensional accuracy of the workpiece. After lubricating the first cold heading die 101 and the second cold heading die 202, it can not only protect the mold, but also prevent the metal surface of the mold from oxidation or corrosion, thereby improving the service life of the mold.

[0029] As an implementation method in this embodiment, Figures 3 to 10 As shown, the conveying unit includes a conveying plate 3 slidably connected to the cold heading seat 2, one end of the conveying plate 3 close to the feeding barrel 201 is fixedly connected to the second pressing plate 303, and the other end of the conveying plate 3 is fixedly connected to the connecting plate 304. A return spring 205 is fixedly connected to the cold heading seat 2, one end of the return spring 205 is fixed to the cold heading seat 2 and the other end is in conflict with the connecting plate 304. The conveying unit also includes a first pressing plate 103 fixedly connected to the cold heading head 1 and corresponding to the position of the second pressing plate 303. There are two conveying plates 3, and the two conveying plates 3 are respectively located on both sides of the cold heading hole 203. A plurality of arc plates 301 arranged linearly are fixedly connected to the conveying plate 3, and the arc plates 301 are semicircular in profile. Baffles 302 are fixedly connected to the arc plates 301 and the conveying plate 3. The first pressing plate 103 and the second pressing plate 303 are both triangular in profile, and the two inclined surfaces of the first pressing plate 103 and the second pressing plate 303 fit each other.

[0030] By setting the above structure, when the cold heading head 1 moves toward the cold heading seat 2, the first pressing plate 103 will squeeze the second pressing plate 303. Since the first pressing plate 103 and the second pressing plate 303 are both triangular in profile, and the two inclined surfaces of the first pressing plate 103 and the second pressing plate 303 fit each other, the two will drive the second pressing plate 303 to slide on the cold heading seat 2 during the extrusion process. During the sliding process of the second pressing plate 303, the conveying plate 3 will be driven to slide on the cold heading seat 2 as a whole. During the sliding process of the conveying plate 3, the arc plate 301 will push the cold heading workpiece on the cold heading seat 2, and push the cold heading workpiece at the position of the cold heading hole 203 to the retention area 204. The cold heading machine in the present application is a horizontal cold heading machine, so baffles 302 are installed on the arc plate 301 and the conveying plate 3 to block and limit the cold heading workpiece, wherein two baffles 302 are installed on the arc plate 301, and several baffles 302 are installed on the conveying plate 3 facing the bottom of the cold heading machine body. During the transportation of the cold heading workpiece, the outer wall of the cold heading workpiece will fit into the baffle 302 on the arc plate 301, and under the action of gravity, the outer wall of the cold heading workpiece will also contact the conveying plate 3 under the cold heading machine body. Such a setting can block and limit the cold heading workpiece in all directions, thereby preventing the cold heading workpiece from being offset and misaligned during transportation.

[0031] Furthermore, since the connecting plate 304 is in conflict with the return spring 205, when the conveying plate 3 moves toward the return spring 205, the connecting plate 304 will squeeze the return spring 205, and the return spring 205 will be deformed and folded together. When the cold heading workpiece is processed in a cold heading hole 203, the cold heading head 1 will move away from the cold heading seat 2. At this time, the first pressing plate 103 will not squeeze the second pressing plate 303. Under the elastic force of the return spring 205, the conveying plate 3 will automatically reset. When the cold heading head 1 moves toward the cold heading seat 2 again, the arc plate 301 will push the cold heading workpiece to the retention area 204 again. At this time, the cold heading workpiece originally staying in the retention area 204 will be pushed into the cold heading hole 203 by the new cold heading workpiece. In this reciprocating operation, the automatic transportation of all cold heading workpieces can be completed. With such a transportation method, the mutual movement of the cold heading head 1 and the cold heading seat 2 is used to automatically realize the transportation function of the cold heading workpiece, save energy consumption and machine cost, and ensure the efficiency of cold heading workpiece transportation.

[0032] In this embodiment, if Figures 3 to 10As shown, the conveying plate 3, the arc plate 301 and the second pressing plate 303 are all provided with a lubrication cavity 305, the bottom of the arc plate 301 and the inclined surface of the second pressing plate 303 are both provided with an oil outlet 306 connected to the lubrication cavity 305, the bottom of the inclined surface of the second pressing plate 303 is provided with a reflux groove, the end of the cold heading seat 2 away from the feeding cylinder 201 is fixedly connected to the oil storage tank 4, the top outer wall of the oil storage tank 4 is fixedly connected to the oil inlet pipe 401, the oil storage tank 4 is plugged with a piston rod 104, one end of the piston rod 104 is plugged into the oil storage tank 4 and the other end is fixedly connected to the cold heading head 1, and the bottom outer wall of the oil storage tank 4 is fixedly connected to the oil delivery pipe 40 2. A first one-way valve 403 is fixedly connected to the oil delivery pipe 402, and two hoses 404 are fixedly connected to one end of the oil delivery pipe 402. The two hoses 404 are respectively fixed to the two connecting plates 304. A return pipe 405 is fixedly connected to the bottom end of the oil storage tank 4, and a second one-way valve 406 is fixedly connected to the return pipe 405. One end of the return pipe 405 is fixedly connected to a collecting pipe 407, and the collecting pipe 407 is staggered and wound on the outer wall of the second cold heading die 202. One end of the collecting pipe 407 is connected to the return pipe 405, and the other end is fixedly connected to the delivery barrel 201, and the collecting pipe 407 is connected to each second cold heading die 202.

[0033] Through the arrangement of the above structure, when the cold heading head 1 moves toward the cold heading seat 2, the piston rod 104 will squeeze the lubricating oil in the oil storage tank 4. At this time, the lubricating oil in the oil storage tank 4 will flow out from the oil pipe 402 under the squeezing action of the piston rod 104, and the lubricating oil that flows out will be transported to the bottom of the arc plate 301 and the oil outlet hole 306 on the inclined surface of the second pressure plate 303 through the lubrication cavity 305, and then the lubricating oil will flow out from the oil outlet hole 306. The lubricating oil that flows out from the bottom of the arc plate 301 will enter the cold heading hole 203 when the arc plate 301 slides through the cold heading hole 203, and will also be flattened on the cold heading seat 2 when the arc plate 301 slides. This arrangement can not only reduce the friction between the conveying plate 3 and the arc plate 301 and the cold heading seat 2, but also reduce the friction between the conveying plate 3 and the arc plate 301 The lubricating oil entering the cold heading hole 203 can lubricate the cold heading workpiece, thereby effectively preventing the cold heading workpiece from being scratched or scratched during the cold heading process, improving the surface finish and dimensional accuracy of the workpiece, and at the same time, lubricating the first cold heading die 101 and the second cold heading die 202 can also be lubricated, thereby protecting the die from oxidation or corrosion of the metal surface of the die and improving the service life of the die; the lubricating oil flowing out from the inclined surface of the second pressing plate 303 can lubricate the second pressing plate 303, and when the first pressing plate 103 and the second pressing plate 303 are squeezed against each other, the lubricating oil can lubricate the two and reduce the wear of the two, and the lubricating oil left on the second pressing plate 303 finally flows into the reflux groove at the bottom of the second pressing plate 303, and is finally transported into the feed barrel 201 through a pipeline.

[0034] Furthermore, since the second one-way valve 406 is installed on the return pipe 405, the lubricating oil will not flow out of the return pipe 405 during the process of the piston rod 104 squeezing the lubricating oil. Since the hose 404 is installed at the end of the oil delivery pipe 402, the hose 404 will be deformed during the sliding of the conveying plate 3 without affecting the position of the oil delivery pipe 402. When the cold heading head 1 moves away from the cold heading seat 2, the piston will slide in the opposite direction in the oil storage tank 4. At this time, negative pressure will be generated in the oil storage tank 4 under the action of the piston, so that the return pipe 405 sucks the excess lubricating oil in the second cold heading die 202 and the feed barrel 201, and recycles the lubricating oil for secondary use. Since the first one-way valve 403 is installed on the oil delivery pipe 402, when negative pressure is generated in the oil storage tank 4, the lubricating oil in the oil delivery pipe 402 will not flow back. When the lubricating oil in the oil storage tank 4 is insufficient, it can be added through the oil inlet pipe 401 to ensure that the lubricating oil in the oil storage tank 4 can be recycled normally.

[0035] The working principle of the technical solution provided by the present invention is as follows: When in use, the cold heading workpiece is conveyed from the feeding tube 201 to the cold heading seat 2, and the cold heading head 1 will move toward the cold heading seat 2 under the driving action of the hydraulic component. When the cold heading head 1 moves toward the cold heading seat 2, the first pressing plate 103 will squeeze the second pressing plate 303, and the two will drive the second pressing plate 303 to slide on the cold heading seat 2 during the squeezing process. During the sliding of the second pressing plate 303, the conveying plate 3 will be driven to slide on the cold heading seat 2 as a whole. During the sliding of the conveying plate 3, the arc plate 301 will push the cold heading workpiece on the cold heading seat 2, and push the cold heading workpiece at the position of the cold heading hole 203 to the retention area 204. Since the connecting plate 304 conflicts with the return spring 205, when the conveying plate 3 moves toward the direction of the return spring 205, the connecting plate 304 will squeeze the return spring 205. 5 is deformed and folded together by force. When the cold heading workpiece is processed in a cold heading hole 203, the cold heading head 1 will move away from the cold heading seat 2. At this time, the first pressing plate 103 will not squeeze the second pressing plate 303. The conveying plate 3 will automatically reset under the elastic force of the reset spring 205. When the cold heading head 1 moves toward the cold heading seat 2 again, the arc plate 301 will push the cold heading workpiece to the retention area 204 again. At this time, the cold heading workpiece originally staying in the retention area 204 will be pushed into the cold heading hole 203 by the new cold heading workpiece. In this reciprocating operation, the automatic conveying of all cold heading workpieces can be completed. With such a conveying method, the mutual movement of the cold heading head 1 and the cold heading seat 2 is used to automatically realize the conveying function of the cold heading workpiece, save energy consumption and machine cost, and ensure the efficiency of conveying the cold heading workpiece.

[0036] When the cold heading head 1 moves toward the cold heading seat 2, the piston rod 104 will squeeze the lubricating oil in the oil storage tank 4. At this time, the lubricating oil in the oil storage tank 4 will flow out from the oil pipe 402 under the squeezing action of the piston rod 104, and the lubricating oil will be transported to the bottom of the arc plate 301 and the oil outlet hole 306 on the inclined surface of the second pressure plate 303 through the lubrication cavity 305, and then the lubricating oil will flow out from the oil outlet hole 306. The lubricating oil flowing out from the bottom of the arc plate 301 will enter the cold heading hole 203 when the arc plate 301 slides through the cold heading hole 203, and will also be flattened on the cold heading seat 2 when the arc plate 301 slides. This setting can not only reduce the friction between the conveying plate 3 and the arc plate 301 and the cold heading seat 2, but also reduce the wear of the conveying plate 3 and the arc plate 301. The lubricating oil flowing out from the inclined surface of the second pressing plate 303 can lubricate the second pressing plate 303. When the first pressing plate 103 and the second pressing plate 303 are squeezed against each other, the lubricating oil can lubricate the two to reduce the wear of the two. When the cold heading head 1 moves away from the cold heading seat 2, the piston will slide in the opposite direction in the oil storage tank 4. At this time, negative pressure will be generated in the oil storage tank 4 under the action of the piston, so that the reflux pipe 405 can suck the excess lubricating oil in the second cold heading die 202 and the feed barrel 201, and the lubricating oil is recycled for secondary use.

[0037] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A cold heading machine for fastener production, comprising a cold heading head and a cold heading seat, characterized in that: The side of the cold heading head close to the cold heading seat is fixedly connected with a first cold heading die and a material discharging chuck, the side of the cold heading seat away from the cold heading head is fixedly connected with a second cold heading die and a material conveying tube, the other side of the cold heading seat is provided with a cold heading hole corresponding to the position of the second cold heading die, and a retention area is fixedly connected between two adjacent cold heading holes; A conveying unit is used to convey the cold heading workpiece, and the conveying unit is respectively connected to the cold heading head and the cold heading seat.

2. The cold heading machine for fastener production according to claim 1, characterized in that: The conveying unit includes a conveying plate slidably connected to the cold heading seat, a second pressure plate is fixedly connected to one end of the conveying plate close to the feeding barrel, a connecting plate is fixedly connected to the other end of the conveying plate, a return spring is fixedly connected to the cold heading seat, one end of the return spring is fixed to the cold heading seat and the other end is in contact with the connecting plate, the conveying unit also includes a first pressure plate fixedly connected to the cold heading head and corresponding to the position of the second pressure plate.

3. The cold heading machine for fastener production according to claim 2, characterized in that: There are two conveying plates in total, and the two conveying plates are respectively located on both sides of the cold heading hole. A plurality of arc plates arranged linearly are fixedly connected to the conveying plate, and the arc plates have a semicircular profile. Baffles are fixedly connected to the arc plates and the conveying plates.

4. The cold heading machine for fastener production according to claim 2, characterized in that: The first pressing plate and the second pressing plate both have triangular profiles, and two inclined surfaces of the first pressing plate and the second pressing plate fit each other.

5. The cold heading machine for fastener production according to claim 2, characterized in that: The conveying plate, the arc plate and the second pressing plate are all provided with lubrication cavities, the bottom of the arc plate and the inclined surface of the second pressing plate are both provided with oil outlets connected with the lubrication cavities, and the bottom of the inclined surface of the second pressing plate is provided with a reflux groove.

6. The cold heading machine for fastener production according to claim 2, characterized in that: The cold heading seat is fixedly connected to an oil storage tank at one end away from the feeding cylinder, an oil inlet pipe is fixedly connected to the top outer wall of the oil storage tank, a piston rod is inserted in the oil storage tank, one end of the piston rod is inserted in the oil storage tank and the other end is fixedly connected to the cold heading head.

7. The cold heading machine for fastener production according to claim 6, characterized in that: An oil pipeline is fixedly connected to the outer wall of the bottom of the oil storage tank, a first one-way valve is fixedly connected to the oil pipeline, one end of the oil pipeline is fixedly connected to two hoses, and the two hoses are respectively fixed to the two connecting plates.

8. The cold heading machine for fastener production according to claim 6, characterized in that: A return pipe is fixedly connected to the bottom end of the oil storage tank, a second one-way valve is fixedly connected to the return pipe, one end of the return pipe is fixedly connected to a collecting pipe, the collecting pipe is staggered and wound around the outer wall of the second cold heading die, one end of the collecting pipe is connected to the return pipe, and the other end is fixedly connected to the feed barrel, and the collecting pipe is connected to each of the second cold heading dies.

9. The cold heading machine for fastener production according to claim 1, characterized in that: A pushing mechanism is installed at one end of the second cold heading die away from the cold heading hole, and the pushing mechanism is used to push the cold heading workpiece out of the second cold heading die.

10. The cold heading machine for fastener production according to claim 1, characterized in that: The discharging chuck is a mechanical clamping mechanism, which is used to take the cold-forging workpiece that has been cold-forging processed out of the cold-forging seat.

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