A rod-like blank stretch-forging machine

Abstract

This invention belongs to the field of hardware tool manufacturing technology, specifically relating to a rod-type billet stretching and forging machine. It includes a worktable with a heating device and a clamping device. The clamping device comprises a fixed part and a moving part, each including two opposing fixed clamps and a moving clamp. The fixed and moving clamps cooperate via an opening and closing device to clamp both ends of the raw material rod. The moving part is connected to a driving device, which drives the moving part to reciprocate linearly along the central axis of the raw material rod. This invention has a simple structure and is easy to operate. The heating device heats the raw material rod, and the clamping device clamps both ends of the heated rod. The fixed part fixes one end of the rod, and the moving part, driven by the driving device, reciprocates within a baffle and a fixed plate, realizing the clamping, stretching, and unloading processes of the raw material rod. It features a high degree of automation, saves time and labor, minimizes safety hazards during billet preparation, and has high production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of hardware tool manufacturing technology, and in particular relates to a rod-type billet stretching and forging machine. Background Technology

[0002] Rod-type hardware tools are a general term for a class of hardware tools. They are similar in shape and structure to rods, and most of them work by special structures at both ends, with a slender hand-held part in the middle, such as single-ended wrenches, double-ended wrenches, open-end wrenches, box wrenches, etc.

[0003] For mature hardware tools with low prices, improving processing technology, enhancing product quality, and reducing processing costs are important goals for all processing manufacturers. In the processing of rod-type hardware tools, achieving efficient blank preparation is a necessary guarantee for efficient production.

[0004] The existing manufacturing process for rod-type hardware tools mostly uses round steel as raw material. The process involves cutting the round steel, heating the end mill, forging the blank, and then machining and grinding it. This process is complex and inefficient. Among these steps, the blank forging is the most crucial. Poor forging results in high raw material consumption and high energy consumption.

[0005] Existing blank forging methods mostly involve manual forging by workers using pneumatic or hydraulic hammers. These methods have low automation, are time-consuming and labor-intensive, and generate significant noise, pose a high risk, and have low production efficiency.

[0006] A small number of products use hydraulic presses to install molds, employing the cooperation of the hydraulic press and molds to stretch and shape raw materials. However, one set of molds can only produce one type of product. To produce multiple products, multiple sets of molds need to be made, each requiring a matching hydraulic press, resulting in a large footprint and high production costs. If multiple sets of molds use one hydraulic press, frequent mold changes are necessary, which is time-consuming, labor-intensive, and inefficient, making it unsuitable for widespread application. Summary of the Invention

[0007] The problem to be solved by the present invention is to provide a billet forming machine; in particular, a rod-type billet stretching forging machine that is simple in structure, highly automated, occupies a small area, has a wide range of applications, low cost, and high efficiency.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a rod-type billet stretching forging machine, including a worktable, a heating device provided on the worktable, the heating device heating the raw material bar and sending it into a clamping device, the clamping device including a fixed part and a moving part, the fixed part including a first clamp and a second clamp, the moving part including a third clamp and a fourth clamp, the second clamp being connected to the worktable via a first opening and closing device, the third clamp being connected to the worktable via a second opening and closing device, the first clamp and the second clamp cooperating with the first opening and closing device to clamp one end of the raw material bar, the third clamp and the fourth clamp cooperating with the second opening and closing device to clamp the other end of the raw material bar, the moving part being connected to a driving device, the driving device driving the moving part to perform linear reciprocating motion along the central axis of the raw material bar.

[0009] Furthermore, the clamping device is provided with a shaping mold, which includes a first shaping mold and a second shaping mold. The first shaping mold and the second shaping mold are respectively set together, and the first shaping mold and the second shaping mold respectively clamp and shape both ends of the raw material bar.

[0010] Furthermore, the first shaping mold includes a first fixed mold and a first movable mold. The first fixed mold is disposed on the first fixture, and the first movable mold is disposed on the second fixture. The second shaping mold includes a second fixed mold and a second movable mold. The second fixed mold is disposed on the fourth fixture, and the second movable mold is disposed on the third fixture.

[0011] Furthermore, a limit switch is provided on the worktable, and the limit switch controls the reciprocating distance of the drive mechanism.

[0012] Furthermore, a transmission device is provided on the worktable, which transmits the raw material bar from the heating device to the clamping device.

[0013] Furthermore, the clamping device is equipped with a lifting device at the bottom, which assists in clamping the raw material bar.

[0014] Furthermore, the workbench is provided with a fixed plate and a movable plate, the fixed plate and the movable plate are arranged parallel to each other, the fixed plate and the movable plate are respectively perpendicular to the workbench, one side of the fixed plate is connected to the heating device, and the other side of the fixed plate is provided with a fixing part, one side of the movable plate is provided with a moving part, and the other side of the movable plate is connected to the driving mechanism, and the fixing part and the moving part are arranged opposite to each other between the fixed plate and the movable plate.

[0015] Furthermore, the first opening and closing device and the second opening and closing device have the same structure. The first opening and closing device includes a first connecting plate with an L-shaped cross-section and a U-shaped longitudinal section. The second clamp is placed in the U-shaped groove of the first connecting plate, and the fixing plate is placed in the L-shape of the first connecting plate. The end of the first connecting plate parallel to the fixing plate has a connecting hole, and the end of the first connecting plate perpendicular to the fixing plate has a first telescopic rod. A connecting through hole is provided at the intersection of the end of the second clamp near the first clamp and the end of the second clamp near the fixing plate. The connecting hole and the connecting through hole are connected by a rotating shaft. The end of the second clamp away from the first clamp is connected to the first telescopic rod. The first telescopic rod and the rotating shaft allow the first clamp and the second clamp to have two states. In the first state, the first telescopic rod is retracted, the second clamp rotates away from the first clamp along the rotation axis, and the gap between the first clamp and the second clamp increases, the gap being larger than the diameter of the raw material rod; In the second state, the first telescopic rod extends, the second clamp rotates along the rotation axis toward the first clamp, the gap between the first clamp and the second clamp decreases, and the gap is smaller than the diameter of the raw material rod.

[0016] Furthermore, a baffle is vertically provided on the worktable, the baffle is parallel to the fixed plate and the moving plate respectively, the baffle is placed between the moving plate and the driving device, and the moving plate is placed between the fixed plate and the baffle.

[0017] Furthermore, a guide post is provided between the fixed plate and the baffle, the guide post penetrates the movable plate, the movable plate is connected to the driving mechanism, and the driving mechanism penetrates the baffle.

[0018] The advantages and positive effects of this invention are: 1. The present invention has a simple structure and is easy to operate. The raw material bar is heated by a heating device, and the two ends of the heated raw material bar are clamped by a clamping device. One end of the raw material bar is fixed by a fixing part, and the moving part is driven by a driving device to reciprocate within the baffle and the fixing plate, thereby realizing the clamping, stretching and unloading process of the raw material bar. It has a high degree of automation, saves time and labor, has few safety hazards in the blanking process, and has high production efficiency.

[0019] 2. This invention, by setting a shaping mold on the clamping device, can shape both ends of the raw material bar simultaneously during stretching. It can shape both ends or just one end, and can shape it into a plate shape or a sphere shape; it can shape one bar or multiple bars. The shaping mold has a simple structure, low manufacturing cost, and convenient installation. The shaping style and quantity of the mold can be adjusted at any time according to the requirements of the processed parts. It has a wide range of applications, strong practicality, and is suitable for widespread application.

[0020] 3. The present invention realizes a series of processes such as feeding, clamping and unloading of raw material bars through the opening and closing device. The opening and closing device can adjust the gap between the relative clamps, is suitable for raw material bars of various specifications, and facilitates the installation of the shaping mold, thereby improving production efficiency. It has a wide range of applications and strong practicality.

[0021] 4. This invention uses a lifting device to assist the clamping device in clamping the raw material bar. During the clamping process, the lifting device rises and provides support to the bottom of the raw material bar, reducing the impact of the raw material bar's own weight and improving the clamping accuracy. After the clamping device has clamped the raw material bar, the lifting device descends to facilitate the movement of the moving plate. The lifting device improves the clamping efficiency and clamping accuracy of the raw material bar, ensuring the pass rate of the stretching blank.

[0022] 5. This invention controls the reciprocating stroke of the moving plate by setting the reciprocating stroke of the drive mechanism through a limit switch, thereby controlling the stretching length of the raw material bar. It can be set with various specifications and is suitable for blanking of rod-type hardware tools of various lengths. It has a simple structure, is easy to operate, has low production cost, wide application range, and high production efficiency.

[0023] 6. This invention uses a transmission device to transport the heated raw material rods, avoiding burns to workers during transport, reducing safety hazards, and improving work efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0025] Figure 2 This is a second working state diagram of an embodiment of the present invention.

[0026] Figure 3 This is a first working state diagram of an embodiment of the present invention.

[0027] Figure 4 This is a third working state diagram of an embodiment of the present invention.

[0028] Figure 5 This is the fourth working state diagram of an embodiment of the present invention.

[0029] Figure 6This is a schematic diagram of the molding die structure according to an embodiment of the present invention.

[0030] Figure 7 This is a schematic diagram of the opening and closing device according to an embodiment of the present invention.

[0031] Figure 8 This is a diagram showing the first working state of the opening and closing device according to an embodiment of the present invention.

[0032] Figure 9 This is a diagram showing the second working state of the opening and closing device according to an embodiment of the present invention.

[0033] Figure 10 , 11 This is another structural schematic diagram of the opening and closing device according to an embodiment of the present invention.

[0034] Explanation of icon numbers: 1. Worktable surface 2. Drive unit 3. Baffle 4. Guide post; 5. Moving plate; 6. Moving part 7. Clamping device 8. Opening and closing device 9. Fixing part 10. Fixing plate; 11. Heating device; 12. Heating tube 13. Placement pipe; 14. Frame; 15. Lifting device 16. Raw material bar 17. First clamp 18. Second clamp 19. Third clamp; 20. Fourth clamp; 21. First opening and closing device 22. Second opening and closing device; 23. First shaping mold; 24. Second shaping mold 25. First fixed mold; 26. First moving mold; 27. Second fixed mold 28. Second moving mold; 29. ​​First connecting plate; 30. U-shaped groove 31. Connecting hole; 32. First telescopic rod; 33. Connecting through hole 34. Shaping groove; 35. First telescopic rod; 36. First telescopic cylinder. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The following description, in conjunction with the accompanying drawings, details a rod-type billet stretching and forging machine provided by the present invention.

[0039] like Figure 1 As shown, a rod-type billet stretching and forging machine includes a worktable 1. Preferably, a frame 14 is provided under the worktable 1, and the height of the frame 14 is suitable for operator operation. A heating device 11 is provided on the worktable 1. The heating device 11 heats the raw material rod 16 and then sends it into the clamping device 7. The heating device 11 can be any device used to heat the raw material rod 16. The heating device 11 provided in this embodiment includes a placement tube 13 and a heating tube 12. The heating tube 12 is disc-shaped and placed on the outer surface of the placement tube 13. The placement tube 13 is made of tempered glass. The raw material rod 16 is placed inside the placement tube 13, and the heating tube 12 heats the raw material rod 16 inside.

[0040] Preferably, the worktable 1 is equipped with a transmission device, which is a device that transfers the raw material bar 16 from the heating device 11 to the clamping device 7. This is to prevent workers from being burned during the transport of the raw material bar 16, reducing safety hazards and improving work efficiency. The transmission device can be a robotic arm, or it can be a mechanical transmission device that uses push rods and push plates.

[0041] like Figure 2As shown, the clamping device 7 includes a fixed part 9 and a moving part 6. The fixed part 9 includes a first clamp 17 and a second clamp 18, and the moving part 6 includes a third clamp 19 and a fourth clamp 20. The second clamp 18 is connected to the worktable 1 via a first opening and closing device 21, and the third clamp 19 is connected to the worktable 1 via a second opening and closing device 22. The first clamp 17 and the second clamp 18 clamp one end of the raw material bar 16 through the first opening and closing device 21, and the third clamp 19 and the fourth clamp 20 clamp the other end of the raw material bar 16 through the second opening and closing device 22. The moving part 6 is connected to a driving device 2, and the driving device 2 drives the moving part 6 to perform linear reciprocating motion along the central axis of the raw material bar 16.

[0042] The drive device 2 cooperates with the first opening and closing device 21 and the second opening and closing device 22 to enable the first clamp 17, the second clamp 18, the third clamp 19 and the fourth clamp 20 to have four static states.

[0043] like Figure 3 As shown, in the first state, the drive device 2 is in a near position, the gap between the fixed part 9 and the moving part 6 is minimal, the first opening and closing device 21 and the second opening and closing device 22 are open, the gap between the first clamp 17 and the second clamp 18 is opened to its maximum, and the gap between the third clamp 19 and the fourth clamp 20 is also opened to its maximum. The gap between the fixed part 9 and the moving part 6 is less than the length of the raw material bar 16, the gap between the first clamp 17 and the second clamp 18 is greater than the diameter of the raw material bar 16, and the gap between the third clamp 19 and the fourth clamp 20 is also greater than the diameter of the raw material bar 16. At this time, it is convenient for the raw material bar 16 to be placed on the clamping device 7.

[0044] like Figure 2 As shown, in the second state, the drive device 2 is in the near position, the gap between the fixed part 9 and the moving part 6 is minimal, the first opening and closing device 21 and the second opening and closing device 22 are closed, the gap between the first clamp 17 and the second clamp 18 is minimal, and the gap between the third clamp 19 and the fourth clamp 20 is also closed to its minimum. The gap between the fixed part 9 and the moving part 6 is less than the length of the raw material bar 16, the gap between the first clamp 17 and the second clamp 18 is less than the diameter of the raw material bar 16, and the gap between the third clamp 19 and the fourth clamp 20 is also less than the diameter of the raw material bar 16. At this time, the raw material bar 16 is clamped on the clamping device 7.

[0045] like Figure 4As shown, in the third state, the drive device 2 is in the far position, the gap between the fixed part 9 and the moving part 6 is at its maximum, the first opening and closing device 21 and the second opening and closing device 22 are closed, the gap between the first clamp 17 and the second clamp 18 is at its minimum, and the gap between the third clamp 19 and the fourth clamp 20 is also closed to its minimum. The gap between the fixed part 9 and the moving part 5 is greater than the length of the raw material bar 16, the gap between the first clamp 17 and the second clamp 18 is less than the diameter of the raw material bar 16, and the gap between the third clamp 19 and the fourth clamp 20 is also less than the diameter of the raw material bar 16. At this time, the raw material bar 16 is clamped on the clamping device 7 and stretched.

[0046] like Figure 5 As shown, in the fourth state, the drive device 2 is in the far position, the gap between the fixed part 9 and the moving part 6 is at its maximum, the first opening and closing device 21 and the second opening and closing device 22 are open, the gap between the first clamp 17 and the second clamp 18 is at its maximum, and the gap between the third clamp 19 and the fourth clamp 20 is also opened to its maximum. The gap between the fixed part 9 and the moving part 6 is greater than the length of the raw material bar 16, the gap between the first clamp 17 and the second clamp 18 is greater than the diameter of the raw material bar 16, and the gap between the third clamp 19 and the fourth clamp 20 is also greater than the diameter of the raw material bar 16. At this time, it is convenient for the stretched raw material bar 16 to detach from the clamping device 7.

[0047] The above four states alternate and cycle to achieve the stretching and blanking of the raw material bar 16.

[0048] Preferably, the clamping device 7 has a lifting device 15 at its bottom, which assists the clamping device 7 in clamping the raw material bar 16. In the first state described above, when the raw material bar 16 is being clamped, the lifting device 15 rises, providing support to the bottom surface of the raw material bar 16, reducing the impact of the raw material bar 16's own weight, and improving clamping accuracy. After the clamping device 7 has clamped the material, i.e., in the second state described above, the lifting device 15 descends, facilitating the movement of the moving plate 5. The lifting device 15 improves the clamping efficiency and clamping accuracy of the raw material bar 16, ensuring the pass rate of the stretching blank.

[0049] Preferably, a limit switch is provided on the worktable 1 to control the reciprocating distance of the drive mechanism 2. A limit device can also be provided to limit the reciprocating stroke of the drive mechanism 2, thereby controlling the reciprocating stroke of the moving part 6 and realizing the control of the stretching length of the raw material bar 16. It can be set with various specifications and is suitable for blanking of bar-type hardware tools of various lengths. It has a simple structure, is easy to operate, has low production cost, wide application range, and high production efficiency.

[0050] Preferred, such as Figure 3As shown, the clamping device 7 is equipped with a shaping mold, which includes a first shaping mold 23 and a second shaping mold 24. The first shaping mold 23 and the second shaping mold 24 are respectively set together, and the first shaping mold 23 and the second shaping mold 24 respectively clamp and shape both ends of the raw material rod 16.

[0051] like Figure 4 As shown, the first shaping mold 23 includes a first fixed mold 25 and a first movable mold 26. The first fixed mold 25 is disposed on the first fixture 17, and the first movable mold 26 is disposed on the second fixture 18. The second shaping mold 24 includes a second fixed mold 28 and a second movable mold 27. The second fixed mold 28 is disposed on the fourth fixture 20, and the second movable mold 27 is disposed on the third fixture 19.

[0052] The shaping mold can shape both ends of the raw material bar 16 while stretching it. Preferably, the shaping mold is movably mounted on the fixture for easy maintenance and replacement. Furthermore, the shaping mold has a simple structure, low manufacturing cost, and is easy to install. Figure 6 As shown, the shaping mold is provided with shaping grooves 34, which can shape both ends of the raw material rod 16 during the stretching process. There are multiple shaping grooves 34. These multiple shaping grooves 34 include various specifications. For example, the shaping mold can shape both ends of the raw material rod 16 simultaneously, or it can selectively shape only one end of the raw material rod 16; the shaping mold can shape the raw material rod 16 into a plate shape, a sphere shape, or various other shapes required for processing the raw material rod 16; the shaping mold can be configured to shape one raw material rod 16 or multiple raw material rods 16. The shaping style and quantity of the shaping grooves 34 can be adjusted at any time according to the requirements of the processed parts, resulting in low production costs and a wide range of applications.

[0053] like Figure 1 As shown, a fixed plate 10, a movable plate 5, and a baffle 3 are vertically arranged on the workbench surface 1, and the fixed plate 10, movable plate 5, and baffle 3 are arranged in parallel. The movable plate 5 is positioned between the fixed plate 10 and the baffle 3. A guide post 4 is provided between the fixed plate 10 and the baffle 3. The guide post 4 guides the linear movement of the movable part 6 relative to the fixed part 9. There can be one or more guide posts 4, and the guide post 4 penetrates the movable plate 5. One side of the fixed plate 10 is connected to the heating device 11, and the other side of the fixed plate 10 is provided with the fixed part 9. One side of the movable plate 5 is provided with the movable part 6, and the other side of the movable plate 5 is connected to the drive mechanism 2. The fixed part 9 and the movable part 6 are arranged opposite each other between the fixed plate 10 and the movable plate 5. The movable plate 5 is connected to the drive mechanism 2, and the drive mechanism 2 penetrates the baffle 3.

[0054] The drive device 2 is a device that drives the moving plate 5 to reciprocate. The drive device 2 can be a drive motor or a hydraulic rod. The hydraulic rod passes through the baffle 3 and connects to the moving plate 5. There can be one hydraulic rod or multiple hydraulic rods.

[0055] The opening and closing device 8 is a device that enables the movement of the second clamp 18 and the third clamp 19, thereby changing the gap size between the relative first clamp 17 and the second clamp 18 or the third clamp 19 and the fourth clamp 20. This device enables a series of processes such as loading, clamping, and unloading of the raw material bar 16. The opening and closing device 8 can adjust the gap between the relative clamps and is suitable for raw material bars 16 of various specifications. It also facilitates the installation of the shaping mold.

[0056] The opening and closing device 8 can have various structures. In this embodiment, the first opening and closing device 21 and the second opening and closing device 22 have the same structure. Figure 7 As shown, the first opening and closing device 21 includes a first connecting plate 29, which has an L-shaped cross-section and a U-shaped longitudinal section. A second clamp 18 is placed within the U-shaped groove 30 of the first connecting plate 29, and a fixing plate 10 is placed within the L-shape of the first connecting plate 29. A connecting hole 31 is provided at the end of the first connecting plate 29 parallel to the fixing plate 10, and a first telescopic rod 32 is provided at the end of the first connecting plate 29 perpendicular to the fixing plate 10. A connecting through hole 33 is provided at the intersection of the end of the second clamp 18 near the first clamp 17 and the end of the second clamp 18 near the fixing plate 10. The connecting hole 31 and the connecting through hole 33 are connected by a rotating shaft. The end of the second clamp 18 away from the first clamp 17 is connected to the first telescopic rod 32, and the first telescopic rod 32 and the rotating shaft allow the first clamp 17 and the second clamp 18 to have two states.

[0057] like Figure 8 As shown, in the first state, the first telescopic rod retracts, and the second clamp rotates away from the first clamp along the rotation axis. The gap between the first clamp and the second clamp increases, and the gap is greater than the diameter of the raw material bar, thereby opening the first opening and closing device to facilitate the clamping and release of the raw material bar.

[0058] like Figure 9 As shown, in the second state, the first telescopic rod 32 extends, and the second clamp 18 rotates along the rotation axis toward the first clamp 17. The gap between the first clamp 17 and the second clamp 18 decreases, and the gap is smaller than the diameter of the raw material rod 16, thereby closing the first opening and closing device 21 and clamping the raw material rod 16.

[0059] The opening and closing device 8 can also be like Figure 10 , Figure 11 As shown, the first opening and closing device 21 includes a first telescopic rod 35 and a first telescopic cylinder 36. One end of the first telescopic rod 35 is placed inside the first telescopic cylinder 36, and the other end of the first telescopic rod 35 is connected to a second clamp 18. The second clamp 18 is arranged opposite to the first clamp 17. The separation and clamping of the first clamp 17 and the second clamp 18 are realized by the contraction and extension of the first telescopic rod 35.

[0060] The opening and closing device 8 can also be a wedge-shaped mold or other structure.

[0061] The working principle of this invention is: The raw material bar 16, heated by the heating device 11, is transported to the clamping device 7 via the transmission device.

[0062] Open the first opening and closing device 21 and the second opening and closing device 22, and install the shaping molds that require the shaping of both ends of the workpiece. The lifting device 15 is raised, providing support to the bottom surface of the raw material bar 16, reducing the impact of the raw material bar 16's own weight, and improving clamping accuracy. With the cooperation of the lifting device 15, close the first opening and closing device 21 and the second opening and closing device 22 to clamp the raw material bar 16, and lower the lifting device 15.

[0063] The drive mechanism 2 drives the movable plate 5 to move away from the fixed plate 10. The movable plate 5 moves linearly around the guide post 4. When the movable plate 5 contacts the baffle 3, the linear movement stops. During the movement, the movable part 6 clamps one end of the raw material bar 16 and stretches it. After the linear movement stops, the first opening and closing device 21 and the second opening and closing device 22 open, and the stretched raw material bar 16 falls off the clamping device 7.

[0064] The first opening and closing device 21 and the second opening and closing device 22 are always in the open state. The drive mechanism 2 drives the moving plate 5 to move closer to the fixed plate 10. The moving plate 5 moves in a straight line along the guide post 4. When the moving part 6 moves to the initial position, the straight line movement stops.

[0065] By repeating the above steps, the blank-making process can be completed continuously.

[0066] The working principles of the first opening / closing device 21 and the second opening / closing device 22 are as follows: The first telescopic rod 32 retracts, and the second clamp 18 rotates away from the first clamp 17 along the rotation axis. The gap between the first clamp 17 and the second clamp 18 increases, and the gap is greater than the diameter of the raw material rod 16, thereby opening the first opening and closing device 21.

[0067] The first telescopic rod 32 extends, and the second clamp 18 rotates along the rotation axis toward the first clamp 17. The gap between the first clamp 17 and the second clamp 18 decreases, and the gap is smaller than the diameter of the raw material rod 16, thereby closing the first opening and closing device 21.

[0068] The advantages and positive effects of this invention are: 1. The present invention has a simple structure and is easy to operate. The raw material bar is heated by a heating device, and the two ends of the heated raw material bar are clamped by a clamping device. One end of the raw material bar is fixed by a fixing part, and the moving part is driven by a driving device to reciprocate within the baffle and the fixing plate, thereby realizing the clamping, stretching and unloading process of the raw material bar. It has a high degree of automation, saves time and labor, has few safety hazards in the blanking process, and has high production efficiency.

[0069] 2. This invention, by setting a shaping mold on the clamping device, can shape both ends of the raw material bar simultaneously during stretching. It can shape both ends or just one end, and can shape it into a plate shape or a sphere shape; it can shape one bar or multiple bars. The shaping mold has a simple structure, low manufacturing cost, and convenient installation. The shaping style and quantity of the mold can be adjusted at any time according to the requirements of the processed parts. It has a wide range of applications, strong practicality, and is suitable for widespread application.

[0070] 3. The present invention realizes a series of processes such as feeding, clamping and unloading of raw material bars through the opening and closing device. The opening and closing device can adjust the gap between the relative clamps, is suitable for raw material bars of various specifications, and facilitates the installation of the shaping mold, thereby improving production efficiency. It has a wide range of applications and strong practicality.

[0071] 4. This invention uses a lifting device to assist the clamping device in clamping the raw material bar. During the clamping process, the lifting device rises and provides support to the bottom of the raw material bar, reducing the impact of the raw material bar's own weight and improving the clamping accuracy. After the clamping device has clamped the raw material bar, the lifting device descends to facilitate the movement of the moving plate. The lifting device improves the clamping efficiency and clamping accuracy of the raw material bar, ensuring the pass rate of the stretching blank.

[0072] 5. This invention controls the reciprocating stroke of the moving plate by setting the reciprocating stroke of the drive mechanism through a limit switch, thereby controlling the stretching length of the raw material bar. It can be set with various specifications and is suitable for blanking of rod-type hardware tools of various lengths. It has a simple structure, is easy to operate, has low production cost, wide application range, and high production efficiency.

[0073] 6. This invention uses a transmission device to transport the heated raw material rods, avoiding burns to workers during transport, reducing safety hazards, and improving work efficiency.

[0074] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A rod-type billet stretching forging machine, comprising a worktable, characterized in that: A heating device is provided on the worktable surface. The heating device heats the raw material bar and then sends it into the clamping device. The clamping device includes a fixed part and a moving part. The fixed part includes a first clamp and a second clamp. The moving part includes a third clamp and a fourth clamp. The second clamp is connected to the worktable surface through a first opening and closing device. The third clamp is connected to the worktable surface through a second opening and closing device. The first clamp and the second clamp cooperate through the first opening and closing device to clamp one end of the raw material bar. The third clamp and the fourth clamp cooperate through the second opening and closing device to clamp the other end of the raw material bar. The moving part is connected to a driving device. The driving device drives the moving part to perform linear reciprocating motion along the central axis of the raw material bar. A limit switch is provided on the worktable surface. The limit switch controls the reciprocating distance of the driving device. A transmission device is provided on the worktable surface. The transmission device transmits the raw material bar from the heating device to the clamping device.

2. The rod-type billet stretching forging machine according to claim 1, characterized in that: The clamping device is equipped with a shaping mold, which includes a first shaping mold and a second shaping mold. The first shaping mold and the second shaping mold are respectively set together, and the first shaping mold and the second shaping mold respectively clamp and shape both ends of the raw material bar.

3. The rod-type billet stretching forging machine according to claim 2, characterized in that: The first shaping mold includes a first fixed mold and a first movable mold. The first fixed mold is disposed on the first fixture, and the first movable mold is disposed on the second fixture. The second shaping mold includes a second fixed mold and a second movable mold. The second fixed mold is disposed on the fourth fixture, and the second movable mold is disposed on the third fixture.

4. A rod-type billet stretching forging machine according to any one of claims 1-3, characterized in that: The clamping device is equipped with a lifting device at the bottom, which assists in clamping the raw material bar.

5. A rod-type billet stretching forging machine according to any one of claims 1-3, characterized in that: The workbench is provided with a fixed plate and a movable plate. The fixed plate and the movable plate are arranged parallel to each other and are perpendicular to the workbench. One side of the fixed plate is connected to the heating device, and the other side of the fixed plate is provided with a fixing part. One side of the movable plate is provided with a moving part, and the other side of the movable plate is connected to the driving device. The fixing part and the moving part are arranged opposite to each other between the fixed plate and the movable plate.

6. A rod-type billet stretching forging machine according to claim 5, characterized in that: The first opening and closing device and the second opening and closing device have the same structure. The first opening and closing device includes a first connecting plate with an L-shaped cross-section and a U-shaped longitudinal section. The second clamp is placed in the U-shaped groove of the first connecting plate, and the fixing plate is placed in the L-shape of the first connecting plate. The end of the first connecting plate parallel to the fixing plate is provided with a connecting hole, and the end of the first connecting plate perpendicular to the fixing plate is provided with a first telescopic rod. The end of the second clamp near the first clamp and the end of the second clamp near the fixing plate are provided with a connecting through hole. The connecting hole and the connecting through hole are connected by a rotating shaft. The end of the second clamp away from the first clamp is connected to the first telescopic rod. The first telescopic rod and the rotating shaft enable the first clamp and the second clamp to have two states. In the first state, the first telescopic rod is retracted, and the second clamp rotates away from the first clamp along the rotating shaft. The gap between the first clamp and the second clamp increases, and the gap is greater than the diameter of the raw material rod. In the second state, the first telescopic rod extends, the second clamp rotates along the rotation axis toward the first clamp, the gap between the first clamp and the second clamp decreases, and the gap is smaller than the diameter of the raw material rod.

7. A rod-type billet stretching forging machine according to claim 5, characterized in that: A baffle is vertically provided on the workbench, and the baffle is parallel to the fixed plate and the moving plate respectively. The baffle is placed between the moving plate and the driving device, and the moving plate is placed between the fixed plate and the baffle.

8. A rod-type billet stretching forging machine according to claim 7, characterized in that: A guide post is provided between the fixed plate and the baffle, the guide post penetrates the movable plate, the movable plate is connected to the driving device, and the driving device penetrates the baffle.

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