A hot upsetting die for a lengthened bolt

Abstract

This application relates to the field of mold technology and discloses a hot upsetting mold for extended bolts, including a forming mold and an upper mold. The upper surface of the forming mold has a cavity, and an adjustment component is provided at the bottom of the cavity. The adjustment component includes a threaded cylinder disposed on the bottom wall of the cavity, coaxially and rotatably connected to the cavity. A screw is threadedly connected to the inside of the threaded cylinder, and a sealing disc is fixedly connected to the top of the screw. This hot upsetting mold for extended bolts, by providing an adjustment component at the bottom of the forming mold cavity, achieves flexible control of the cavity depth. Compared to the cumbersome process of adjusting the thickness and number of shims one by one in the prior art, this eliminates the need for operators to perform individual operations, avoiding errors caused by complex operations, and thus improving production efficiency. This adjustment method enables stepless adjustment, precisely meeting the diverse needs of different customers for extended bolt lengths, greatly improving the versatility and flexibility of the mold.

Description

Technical Field

[0001] This application relates to the field of mold technology, specifically to a hot upsetting mold for extended bolts. Background Technology

[0002] A bolt is a fastener used to connect and secure two or more components. It is usually made of metal and has a threaded rod-like structure.

[0003] An existing patent (publication number: CN202105959U) discloses a hot upsetting die for extended bolts, comprising an upper die, a lower die, and an ejection mechanism arranged from top to bottom. The upper die is connected to a punch press slide, and the lower die is fixedly connected to the punch press bed via a lower template. The upper die includes an upper template and an upper punch, which is installed below the upper template. The lower die includes a lower die base and a pad box fixed on the lower template. The pad box is located below the lower die base and contains pads. The lower die base has a hexagonal die and a circular die arranged sequentially at the top and bottom. The hexagonal die corresponds to the position of the upper punch. An upper ejector rod is provided in the cylindrical channel of the circular die, and the lower end of the upper ejector rod contacts the pad. A lower ejector rod is provided at the bottom of the pad box. The ejection mechanism includes an ejection plate and an ejector bolt. The ejection plate is fixedly connected to the upper template via a column, and the ejector bolt on the ejection plate corresponds to the position of the lower ejector rod. This utility model is simple and convenient to operate, suitable for forming extended bolts of different lengths, and saves costs.

[0004] However, the adjustment process is rather cumbersome, requiring operators to adjust the thickness and number of shims one by one, which increases the complexity of the operation and the possibility of errors, thus affecting production efficiency. Secondly, this adjustment method cannot achieve stepless adjustment and can only adjust the length under a few preset shim combinations, making it difficult to accurately meet the diverse needs of different customers for extended bolt lengths, thus limiting the versatility and flexibility of the mold. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides an extended bolt hot upsetting mold with advantages such as stepless adjustment, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a hot upsetting mold for extended bolts, comprising a forming mold and an upper mold, wherein a mold cavity is provided on the upper surface of the forming mold, and an adjustment component is provided at the bottom of the mold cavity; The adjusting assembly includes a threaded cylinder disposed on the bottom wall of the mold cavity. The threaded cylinder is coaxially disposed and rotatably connected to the mold cavity. A screw is threadedly connected to the inside of the threaded cylinder. A sealing disc is fixedly connected to the top of the screw. The sealing disc is slidably inserted into the mold cavity. A sealing ring is fixedly connected to the outer surface of the sealing disc. The adjustment assembly also includes a guide plate fixedly connected to the bottom end of a screw. Guide rods are fixedly connected to the upper surfaces of the two guide plates along the height direction of the forming mold, and the two guide rods are respectively inserted into the upper mold.

[0007] Furthermore, the screw has an internal cavity, and the top of the screw has an annular arrangement of spray holes. An applicator sponge is installed at the top of the screw, and the applicator sponge is located between the sealing disc and the threaded cylinder.

[0008] With the above scheme, after processing, the workpiece can be ejected by driving the screw to move upward, which facilitates the removal of the workpiece and improves production efficiency. During the resetting process, the release agent can be sprayed through the spray hole and applied with a sponge to evenly coat the inner wall of the mold cavity, reducing the adhesion between the workpiece and the inner wall of the mold cavity, which facilitates the subsequent molding and demolding of the workpiece.

[0009] Furthermore, a micro pump is installed below the screw, with the output end of the micro pump fixedly connected to the bottom end of the screw, and the input end of the micro pump connected to an external mold release agent storage container via a hose.

[0010] Through the above scheme, the micro pump can extract the release agent from the storage container and deliver it into the screw, and then spray it out through the spray hole, realizing the automatic spraying of the release agent and improving the automation level and work efficiency of the release agent application.

[0011] Furthermore, the molding die has a cooling cavity arranged along its height direction inside. The cooling cavity is spirally arranged and coaxial with the mold cavity. The top of the cooling cavity is fixedly connected to a return pipe arranged horizontally along the molding die, and the bottom of the cooling cavity is fixedly connected to an input pipe arranged horizontally along the molding die.

[0012] With the above scheme, the input pipe and output end are connected to the external cooling water circulation equipment. With the above settings, the cooling water enters the spiral cooling chamber from the input pipe, absorbs the heat transferred from the mold cavity, and flows out from the return pipe to realize the circulation of cooling water, reduce the temperature of the mold cavity, prevent the mold from deforming due to high temperature, extend the service life of the mold, and at the same time ensure the dimensional accuracy of the mold during the hot upsetting process.

[0013] Furthermore, a set of guide pillars arranged in a matrix are fixedly connected to the upper surface of the molding die, and the upper die is slidably connected to the set of guide pillars.

[0014] Through the above scheme, the upper mold moves linearly along the guide post under the guidance of the guide post through an external linear drive source, such as a cylinder, so as to realize the stable mold closing and mold opening action of the upper mold and the forming mold, and ensure the stability and reliability of the hot forging process.

[0015] Furthermore, a worm gear is fixedly connected to the outer surface of the threaded cylinder, and two shaft plates are fixedly connected to the bottom of the forming mold. A worm is rotatably connected between the two shaft plates, and the worm meshes with the worm gear. One end of the worm is fixedly connected to the output end of an external motor.

[0016] The above scheme uses a motor to drive the worm gear to rotate, which in turn drives the worm wheel to rotate, thereby driving the threaded cylinder to rotate and realizing the up and down movement of the screw, thus adjusting the position of the sealing disc.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial effects: This extended bolt hot upsetting mold achieves flexible control of the mold cavity depth by setting an adjustment component at the bottom of the mold cavity. Compared with the cumbersome process of adjusting the thickness and number of pads one by one in the existing technology, it eliminates the need for operators to operate one by one, avoids errors caused by complex operation, and thus improves production efficiency. This adjustment method can achieve stepless adjustment and can accurately meet the diverse needs of different customers for extended bolt length, greatly improving the versatility and flexibility of the mold. The screw is designed with an internal cavity and has an annular array of spray holes at the top, with a coating sponge installed. After processing, the screw can be driven upward to eject the workpiece, facilitating its removal and improving production efficiency. During the resetting process, the release agent is sprayed through the spray holes in conjunction with the coating sponge, which can evenly coat the inner wall of the mold cavity with the release agent, reducing the adhesion between the workpiece and the inner wall of the mold cavity. This facilitates the subsequent molding and demolding of the workpiece, further improving production efficiency and product quality. A cooling chamber is spirally arranged along its height inside the molding die. The cooling chamber is coaxial with the mold cavity and is connected to an external cooling water circulation device through a return pipe at the top and an input pipe at the bottom. Cooling water enters the spiral cooling chamber from the input pipe, absorbs the heat transferred from the mold cavity, and then flows out from the return pipe, realizing the circulation of cooling water, reducing the temperature of the mold cavity, reducing wear, and extending the service life of the mold. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 1 ; Figure 2 This is a front view of the overall structure of this application; Figure 3 This is a sectional view of the overall structure of this application from a side view. Figure 4 This is a sectional view of the overall structure of this application from the front. Figure 5 This is a structural diagram of the adjustment component in this application; Figure 6 This is a structural diagram of the worm gear and worm shaft of this application.

[0019] In the picture: 1. Molding mold; 2. Upper mold; 3. Mold cavity; 4. Adjusting assembly; 401. Threaded cylinder; 402. Screw; 403. Sealing disc; 404. Sealing ring; 405. Guide plate; 406. Guide rod; 5. Injection hole; 6. Coating sponge; 7. Micro pump; 8. Cooling chamber; 9. Return pipe; 10. Input pipe; 11. Guide post; 12. Worm gear; 13. Shaft plate; 14. Worm. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Please see Figures 1-6 This embodiment of a hot upsetting mold for extended bolts includes a forming mold 1 and an upper mold 2. The upper surface of the forming mold 1 has a mold cavity 3. The bottom of the mold cavity 3 is provided with an adjustment component 4. The adjustment component 4 includes a threaded cylinder 401 disposed on the bottom wall of the mold cavity 3. The threaded cylinder 401 is coaxially disposed with the mold cavity 3 and rotatably connected. The threaded cylinder 401 is internally threaded with a screw 402. The top end of the screw 402 is fixedly connected with a sealing disc 403. The sealing disc 403 is slidably inserted into the mold cavity 3. The outer surface of the sealing disc 403 is fixedly connected with a sealing ring 404. The sealing ring 404 is made of high-temperature resistant polytetrafluoroethylene. By driving the screw 402, the position of the sealing disc 403 in the mold cavity 3 is adjusted, thereby controlling the depth of the mold cavity 3 to adapt to the depth requirements of hot upsetting of extended bolts of different specifications, thereby improving the versatility and flexibility of the mold.

[0022] The adjusting assembly 4 also includes guide plates 405 fixedly connected to the bottom end of the screw 402. Guide rods 406 are fixedly connected to the upper surfaces of both guide plates 405 along the height direction of the forming mold 1. The two guide rods 406 are respectively inserted into the upper mold 2. The guide rods 406 can guide the upper mold 2 when it closes with the forming mold 1, ensuring accurate alignment of the upper mold 2 and the forming mold 1, and improving the quality of hot forging. The screw 402 has a hollow interior, and its top end has annularly arranged spray holes 5. An applicator sponge 6 is installed at the top end of the screw 402, located between the sealing disc 403 and the threaded cylinder 401. After processing, the screw 402 is driven upwards. The screw 402 is equipped with a micro pump 7 located below it. The output end of the micro pump 7 is fixedly connected to the bottom end of the screw 402. The input end of the micro pump 7 is connected to the external mold release agent storage container through a hose. The micro pump 7 can draw the mold release agent from the storage container and deliver it into the screw 402, and then spray it out through the spray hole 5 to realize the automatic spraying of the mold release agent, thereby improving the automation level and work efficiency of the mold release agent application. During the resetting process, the release agent is sprayed through the spray hole 5 in conjunction with the spray sponge 6 to evenly apply the release agent to the inner wall of the mold cavity 3, reducing the adhesion between the workpiece and the inner wall of the mold cavity 3, which facilitates the subsequent molding and demolding of the workpiece.

[0023] The molding mold 1 has a cooling cavity 8 arranged along its height direction. The cooling cavity 8 is spirally arranged and coaxial with the mold cavity 3. The top of the cooling cavity 8 is fixedly connected to a return pipe 9 arranged horizontally along the molding mold 1, and the bottom of the cooling cavity 8 is fixedly connected to an input pipe 10 arranged horizontally along the molding mold 1. The input pipe 10 and its output end are connected to an external cooling water circulation device. Through the above arrangement, cooling water enters the spiral cooling cavity 8 from the input pipe 10, absorbs the heat transferred from the mold cavity 3, and then flows out from the return pipe 9, realizing the cooling water... The circulating flow reduces the temperature of the mold cavity 3, prevents the mold from deforming due to high temperature, extends the service life of the mold, and ensures the dimensional accuracy of the mold during the hot upsetting process. A set of guide pillars 11 arranged in a matrix is ​​fixedly connected to the upper surface of the forming mold 1. The upper mold 2 is slidably connected to the set of guide pillars 11. The upper mold 2 moves linearly along the guide pillars 11 under the guidance of an external linear drive source, such as a cylinder, so as to realize the stable mold closing and mold opening action of the upper mold 2 and the forming mold 1, and ensure the stability and reliability of the hot upsetting process.

[0024] A worm gear 12 is fixedly connected to the outer surface of the threaded cylinder 401. Two shaft plates 13 are fixedly connected to the bottom of the forming mold 1. A worm 14 is rotatably connected between the two shaft plates 13. The worm 14 meshes with the worm gear 12. One end of the worm 14 is fixedly connected to the output end of an external motor. The motor drives the worm 14 to rotate, which in turn drives the worm gear 12 to rotate, thereby driving the threaded cylinder 401 to rotate, realizing the up and down movement of the screw 402, thereby adjusting the position of the sealing disc 403. The external motor and the micro pump 7 are respectively connected to the external control system. The working logic is as follows: when the depth of the mold cavity 3 needs to be adjusted, the control system controls the motor to start, driving the worm gear 12 and worm 14 mechanism to move and adjust the position of the screw 402. When the processing is completed and demolding and mold release agent needs to be applied, the control system controls the motor to rotate in the opposite direction to push out the workpiece, and at the same time controls the micro pump 7 to start and spray the mold release agent, realizing the automated operation and precise control of the mold.

[0025] The working principle of the above embodiment is as follows: When an external linear drive source, such as a cylinder, is started, it pushes the upper mold 2 to move linearly along the matrix-arranged guide pillars 11 fixedly connected to the upper surface of the forming mold 1. Under the guidance of the guide pillars 11, the upper mold 2 moves stably towards the forming mold 1 to prepare for mold closing. During the mold closing process, the guide rods 406 fixedly connected to the upper surface of the guide plate 405 fixedly connected to the bottom end of the screw 402 along the height direction of the forming mold 1 are respectively inserted into the upper mold 2. The guide rods 406 play a guiding role to ensure that the upper mold 2 and the forming mold 1 can be accurately aligned, avoid deviations during mold closing, and thus improve the quality of hot forging.

[0026] When the depth of the mold cavity 3 needs to be adjusted according to the lengthening bolts of different specifications, the external control system starts the motor. The motor output drives the worm gear 14, which is fixedly connected to it, to rotate. Since the worm gear 14 is meshed with the worm wheel 12, which is rotatably connected to the bottom shaft plate 13 of the forming mold 1, the rotation of the worm gear 14 will drive the worm wheel 12 to rotate. The worm wheel 12 is fixedly connected to the outer surface of the threaded cylinder 401. The rotation of the worm wheel 12 will then drive the threaded cylinder 401 to rotate. The threaded cylinder 401 is set on the bottom wall of the mold cavity 3 and is rotatably connected to the mold cavity 3 on the same axis. The threaded cylinder 401 is internally threaded with a screw 402. When the threaded cylinder 401 rotates, the screw 402 moves up and down along the thread direction. A sealing disc 403 is fixedly connected to the top of the screw 402. The sealing disc 403 is slidably inserted into the mold cavity 3, and a sealing ring 404 is fixedly connected to its outer surface. As the screw 402 moves up and down, the position of the sealing disc 403 in the mold cavity 3 changes, thereby controlling the depth of the mold cavity 3 to meet the depth requirements of hot upsetting of extended bolts of different specifications, and improve the versatility and flexibility of the mold.

[0027] During the hot upsetting process, the cooling chamber 8, which is spirally arranged along its height direction inside the forming mold 1, plays a role. The external cooling water circulation equipment is started, and cooling water enters the spiral cooling chamber 8 from the input pipe 10. During the flow, the cooling water absorbs the heat transferred from the mold cavity 3 and then flows out from the return pipe 9, realizing the circulation of cooling water, reducing the temperature of the mold cavity 3, preventing the mold from deforming due to high temperature, and extending the service life of the mold.

[0028] After processing, the control system controls the motor to rotate in reverse. The motor drives the threaded cylinder 401 to rotate in reverse through the worm gear 12 and worm 14 mechanism, causing the screw 402 to move upward. The sealing disc 403 at the top of the screw 402 pushes out the workpiece formed in the mold cavity 3, facilitating the removal of the workpiece and improving production efficiency. During the upward movement and resetting of the screw 402, the control system controls the micro pump 7 connected to the bottom of the screw 402 to start. The micro pump 7 draws out the release agent from the external release agent storage container through a hose and delivers the release agent to the inside of the screw 402. The inside of the screw 402 is set as a cavity, and the top is provided with annularly arranged spray holes 5. The release agent is sprayed out through the spray holes 5. At the same time, the coating sponge 6 installed at the top of the screw 402 evenly coats the sprayed release agent, so that the release agent evenly covers the inner wall of the mold cavity 3, reducing the adhesion between the workpiece and the inner wall of the mold cavity 3, and facilitating the subsequent forming and demolding of the workpiece.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot-upset forming die for lengthening a bolt, comprising a forming die (1) and an upper die (2), characterized in that: The upper surface of the molding die (1) is provided with a mold cavity (3), and the bottom of the mold cavity (3) is provided with an adjustment component (4). The adjusting component (4) includes a threaded cylinder (401) disposed on the bottom wall of the mold cavity (3). The threaded cylinder (401) is coaxially disposed and rotatably connected to the mold cavity (3). A screw (402) is threadedly connected inside the threaded cylinder (401). A sealing disc (403) is fixedly connected to the top of the screw (402). The sealing disc (403) is slidably inserted into the mold cavity (3). A sealing ring (404) is fixedly connected to the outer surface of the sealing disc (403). The adjustment assembly (4) also includes a guide plate (405) fixedly connected to the bottom end of the screw (402). The upper surfaces of the two guide plates (405) are fixedly connected with guide rods (406) along the height direction of the forming mold (1). The two guide rods (406) are respectively inserted into the upper mold (2).

2. The hot-upset die for a lengthened bolt according to claim 1, wherein: The screw (402) has a cavity inside, and the top of the screw (402) has annularly arranged spray holes (5). A coating sponge (6) is installed on the top of the screw (402), and the coating sponge (6) is located between the sealing disc (403) and the threaded cylinder (401).

3. A hot-upset die for forming an extended bolt according to claim 2, wherein: A micro pump (7) is provided below the screw (402). The output end of the micro pump (7) is fixedly connected to the bottom end of the screw (402), and the input end of the micro pump (7) is connected to an external mold release agent storage container through a hose.

4. The hot-upset die for a lengthened bolt of claim 1 wherein: The molding die (1) has a cooling cavity (8) arranged along its height direction inside. The cooling cavity (8) is spirally arranged and coaxially arranged with the mold cavity (3). The top of the cooling cavity (8) is fixedly connected to a return pipe (9) arranged horizontally along the molding die (1), and the bottom of the cooling cavity (8) is fixedly connected to an input pipe (10) arranged horizontally along the molding die (1).

5. The hot-upset die for a lengthened bolt of claim 1 wherein: The upper surface of the molding die (1) is fixedly connected to a set of guide pillars (11) arranged in a matrix, and the upper die (2) is slidably connected to the set of guide pillars (11).

6. The hot-upset die for a lengthened bolt of claim 1 wherein: The outer surface of the threaded cylinder (401) is fixedly connected to a worm gear (12), and the bottom of the forming mold (1) is fixedly connected to two shaft plates (13). A worm (14) is rotatably connected between the two shaft plates (13). The worm (14) meshes with the worm gear (12), and one end of the worm (14) is fixedly connected to the output end of the motor in the outside.

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