A processing technology and cold heading die for hexagonal flange bolts

Abstract

The present application discloses a processing technology for hexagonal flange bolts, which relates to the technical field of fastener processing, and includes the following steps: S1, blanking, cutting a bar into a plurality of cylindrical blanks; S2, cold heading, cold heading the cylindrical blank, and forming one end of the cylindrical blank into a hexagonal prism head and a disc-shaped flange; S3, die closing, using a cold heading die to close the die and cold head the other end of the cylindrical blank, and forming the other end of the cylindrical blank into a rod including an upper section, a middle section and a lower section; S4, unloading, disassembling and collecting the formed hexagonal flange bolts from the cold heading die. The present application also discloses a cold heading die for hexagonal flange bolts, which includes a left die, a right die, a punch and a unloading assembly. The present application has the effect of reducing processing allowance, improving raw material utilization, and improving production efficiency during the processing of hexagonal flange bolts.

Description

Technical Field

[0001] The present application relates to the technical field of fastener processing, and in particular to a processing technology and a cold heading die for hexagonal flange bolts. Background Art

[0002] Hexagonal flange bolts are widely used in plastic housings to enhance the strength of the plastic housing and facilitate connection and installation. Figure 1 , that is, a hexagonal flange bolt, which includes a head 100, a flange 110 and a rod 120, the head 100 is a regular hexagonal prism, the flange 110 is located on one side of the head 100, the flange 110 is a circular disc-shaped structure, and the flange 110 and the inscribed circle of the head 100 are coaxially arranged; the rod 120 includes an upper section 121, a middle section 122 and a lower section 123, all of which are cylindrical structures and are coaxially arranged with the flange 110, wherein the diameters of the upper section 121 and the lower section 123 are the same, and the diameter of the middle section 122 is larger than the diameter of the upper section 121.

[0003] At present, machining is generally used to process the hexagonal flange bolts, that is, the cylindrical bar is subjected to turning and milling forming processing. However, machining requires cutting the bar, which has the problem of low raw material utilization. Summary of the invention

[0004] In order to improve the problem of low raw material utilization rate in the processing technology of hexagonal flange bolts, the present application provides a processing technology and a cold heading die for hexagonal flange bolts.

[0005] In a first aspect, the present application provides a processing technology for hexagonal flange bolts, which adopts the following technical solution:

[0006] A processing technology for hexagonal flange bolts, comprising the following steps:

[0007] S1: Cutting the bar into multiple cylindrical blanks;

[0008] S2: cold heading, cold heading the cylindrical blank, forming one end of the cylindrical blank into a hexagonal head and a disc-shaped flange;

[0009] S3: die closing, using a cold heading die to close the die and cold head the other end of the cylindrical blank, so that the other end of the cylindrical blank is formed into a rod portion including an upper section, a middle section and a lower section;

[0010] S4: Unloading, removing and collecting the formed hexagonal flange bolts from the cold heading die.

[0011] By adopting the above technical scheme, the rod is formed into a workpiece with an outer dimension similar to that of a finished hexagonal flange bolt through blanking and cold heading processes, and then the middle section of the rod is formed through a mold closing process, thereby completely forming the finished hexagonal flange bolt, avoiding turning processing, reducing processing allowance, thereby improving raw material utilization and enhancing production efficiency.

[0012] Optionally, the diameter of the cylindrical blank is the same as the diameter of the upper section of the rod.

[0013] By adopting the above technical solution, the diameter of the cylindrical blank is the same as the diameter of the upper section of the rod, which reduces the steps of processing the upper section of the rod, reduces the loss of processing allowance, and further improves the utilization rate of raw materials.

[0014] In a second aspect, the present application provides a cold heading die for hexagonal flange bolts, which adopts the following technical solution:

[0015] A cold heading die for hexagonal flange bolts, comprising a left die, a right die and a punch;

[0016] The left mold is provided with an insertion groove, the head and flange of the hexagonal flange bolt are embedded and installed in the insertion groove, and the head abuts against the lower inner wall of the insertion groove, and the flange abuts against the upper inner wall of the insertion groove; the left mold is also provided with a semicircular groove connected with the insertion groove, and the upper section of the hexagonal flange bolt is embedded and abutted in the semicircular groove;

[0017] The structure of the right mold is symmetrical with that of the left mold. When the left mold and the right mold are in contact with each other, the two semicircular grooves form a circular hole.

[0018] A forming groove is formed at one end of the punch, and the structure of the forming groove is matched with the middle section and the lower section of the rod.

[0019] By adopting the above technical scheme, the left die and the right die clamp the head and the flange of the hexagonal flange bolt, the stem of the hexagonal flange bolt extends to the top of the left die, and then the punch punches down, and the corresponding forming groove of the punch directly forms the stem structure of the hexagonal flange bolt, thereby improving the processing efficiency, avoiding the machining and turning operation of the stem, and improving the utilization rate of raw materials.

[0020] Optionally, the cold heading die further comprises a discharge assembly, which is arranged on the left die and is used to discharge the formed hexagonal flange bolt from the cold heading die.

[0021] By adopting the above technical solution, the hexagonal flange bolts are not easy to fall off the die after being stamped and cold headed by the punch, and the unloading assembly pushes the hexagonal flange bolts to fall, thereby improving production efficiency and accelerating production rhythm.

[0022] Optionally, the unloading assembly includes a unloading rod, and a unloading groove penetrating into the semicircular groove is opened on the left mold. The unloading rod is slidably arranged in the unloading groove, and one end of the unloading rod extends to the outside of the left mold.

[0023] By adopting the above technical solution, one end of the unloading rod extends out of the left mold, and the other end of the unloading rod is aligned with the semicircular groove. After the hexagonal flange bolt is formed, the unloading rod is pushed to extend from the semicircular groove to push the hexagonal flange bolt, which facilitates the blanking of the finished product and improves production efficiency.

[0024] Optionally, a boss is fixedly provided on one end of the discharge rod extending to the outside of the left mold, and a return spring is sleeved on the discharge rod. One end of the return spring is fixedly connected to the outer wall of the left mold, and the other end of the return spring is fixedly connected to the boss.

[0025] By adopting the above technical solution, a reset spring is provided. After the unloading rod extends outward from the left mold, the reset spring provides a reset elastic force to the unloading rod, so that the unloading rod automatically retracts after pushing the hexagonal flange bolt to drop the material, thereby improving production efficiency.

[0026] Optionally, a discharge cavity is provided on the left mold, and the discharge assembly includes a driving rack, a transmission component and a driven rack, all of which are arranged in the discharge cavity;

[0027] An active rack, wherein the active rack is slidably arranged in the discharge cavity, the length direction of the active rack is arranged parallel to the movement direction of the punch, and one end of the active rack extends to the outside of the left die, and a pressing plate is fixedly connected to the punch;

[0028] A transmission component, the transmission component includes a driving gear meshed with the driving rack, a driving spring fixed to one end of the driving rack, a first bevel gear coaxially arranged with the driving gear, a second bevel gear meshed with the first bevel gear, a pawl coaxially arranged with the second bevel gear, a ratchet wheel matched with the pawl, and a driven gear coaxially arranged with the ratchet wheel;

[0029] A driven rack is slidably arranged in the discharge chamber, the discharge chamber is communicated with the semicircular groove, the length direction of the driven rack is perpendicular to the length direction of the active rack, and the driven rack is located on one side of the semicircular groove, the driven rack and the driven gear are meshed, one end of the driven rack is fixedly connected to a driven spring, and the other end of the driven spring is fixedly connected in the discharge chamber.

[0030] By adopting the above technical solution, when the punch is punching down, it drives the active rack to slide, and the active spring stores energy; when the punch is reset, the active spring transmits the sliding of the active rack to the sliding motion of the driven rack through the transmission component, and the driven rack slides to push the hexagonal flange bolt to drop the material. The reset of the punch, the separation of the left and right dies, and the unloading of the unloading assembly are carried out simultaneously, which speeds up the production cycle and improves production efficiency while improving the utilization rate of raw materials.

[0031] Optionally, the insertion grooves and the semicircular grooves on the left mold are each provided with two groups that are symmetrically arranged, and the right mold is correspondingly provided. The unloading components are also provided with two groups, and the two groups of unloading components are arranged in a centrally symmetrical manner.

[0032] By adopting the above technical solution, two groups of insert grooves and semicircular grooves are set on the left mold. When one group of insert grooves and semicircular grooves is worn to affect the accuracy, the other group can be used to process the hexagonal flange bolts, thereby reducing production loss costs.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. By setting up a production process of cold heading and die closing, the bar is formed into a workpiece with an outer dimension similar to that of a finished hexagonal flange bolt through blanking and cold heading processes, and then the middle section of the rod is formed through a die closing process, thereby completely forming the finished hexagonal flange bolt, avoiding turning processing, reducing processing allowance, thereby improving raw material utilization and improving production efficiency.

[0035] 2. By setting the left die, the right die and the punch, the left die and the right die clamp the head and the flange of the hexagonal flange bolt, the stem of the hexagonal flange bolt extends to the top of the left die, and then the punch punches down, and the forming groove corresponding to the punch directly forms the stem structure of the hexagonal flange bolt, thereby improving the processing efficiency, avoiding the machining and turning operation of the stem, and improving the utilization rate of raw materials.

[0036] 3. By setting up the unloading assembly, it is convenient for the formed hexagonal flange bolts to be separated from the mold for blanking, which improves the automation degree of the mold closing process and further speeds up the production efficiency of the hexagonal flange bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of the hexagonal flange bolt in this application;

[0038] Figure 2 It is a structural schematic diagram of the cold heading die in Example 1 of the present application;

[0039] Figure 3 is a cross-sectional schematic diagram of the cold heading die in Example 1 of the present application;

[0040] Figure 4 It is a structural schematic diagram of the cold heading die in Example 2 of the present application;

[0041] Figure 5 It is a structural schematic diagram of the unloading assembly in Example 2 of the present application;

[0042] Figure 6 It is a structural schematic diagram of the transmission component in Example 2 of the present application.

[0043] Description of reference numerals: 100, head; 110, flange; 120, rod; 121, upper section; 122, middle section; 123, lower section; 200, left die; 201, insertion groove; 202, semicircular groove; 203, discharge groove; 204, discharge cavity; 300, right die; 400, punch; 401, forming groove; 402, pressing plate; 500, discharge assembly; 511, discharge rod; 512, boss; 513, Return spring; 521, active rack; 522, transmission component; 523, driven rack; 524, active gear; 525, first transmission shaft; 526, active spring; 527, first bevel gear; 528, second bevel gear; 529, second transmission shaft; 530, pawl; 531, ratchet rod; 532, ratchet; 533, ratchet wheel; 534, third transmission shaft; 535, driven gear; 536, driven spring. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-6 This application is described in further detail.

[0045] Example 1

[0046] Embodiment 1 of the present application discloses a processing technology for a hexagonal flange bolt, comprising the following steps:

[0047] S1: Cutting, using a cutting device such as a band saw or a circular saw to cut the rod into a plurality of cylindrical blanks, the diameter of the cylindrical blanks being the same as the diameter of the upper section 121 of the rod 120;

[0048] S2: cold heading, using a cold heading machine to cold head the cylindrical blank, and forming one end of the cylindrical blank into a hexagonal head 100 and a disc-shaped flange 110;

[0049] S3: Clamping the mold, using a cold heading mold to clamp and cold head the other end of the cylindrical blank, so that the other end of the cylindrical blank is formed into a rod portion 120 including an upper section 121, a middle section 122 and a lower section 123; the cold heading mold is used to upset the middle section 122 of the rod portion 120;

[0050] S4: Unloading, removing and collecting the formed hexagonal flange bolts from the cold heading die.

[0051] The implementation principle of a processing technology for hexagonal flange bolts in Example 1 of the present application is as follows: the rod material is formed into a workpiece with an outer dimension similar to that of a finished hexagonal flange bolt through a blanking and cold heading process, and then the middle section 122 of the rod portion 120 is formed through a mold closing process, and the workpiece is completely formed into a finished hexagonal flange bolt, thereby avoiding turning processing and reducing processing allowance, thereby improving raw material utilization and reducing production costs.

[0052] Embodiment 1 of the present application also discloses a cold heading die for hexagonal flange bolts, referring to Figure 2 and Figure 3 The cold heading die is used to upset the middle section 122 of the rod 120, and includes a left die 200, a right die 300, a punch 400, and a discharge assembly 500. The left die 200 and the right die 300 are installed on the lower platform of the cold heading machine, and the left die 200 and the right die 300 make a linear reciprocating motion away from or close to each other, which is used to clamp or release the blank; the punch 400 is installed on the upper platform of the cold heading machine, which is used to upset the middle section 122 of the rod 120; the discharge assembly 500 is used to make the finished hexagonal flange bolts separate from the die for discharge and collection.

[0053] The left die 200 is a square block structure, with a horizontal insertion groove 201 on one side of the left die 200, and a vertical semicircular groove 202 on one end of the left die 200, and the insertion groove 201 and the semicircular groove 202 are connected. After the cold heading process, the head 100 and the flange 110 of the blank are embedded and installed in the insertion groove 201, the head 100 abuts on the lower inner wall of the insertion groove 201, the flange 110 abuts on the upper inner wall of the insertion groove 201, and the cylindrical rod of the blank is embedded and abutted in the semicircular groove 202.

[0054] The structure of the right mold 300 is the same as that of the left mold 200 and is symmetrically arranged. When the left mold 200 and the right mold 300 move closer to each other and abut against each other, the two semicircular grooves 202 form a circular hole, and the cylindrical rod of the blank is inserted into the circular hole, and part of the cylindrical rod of the blank extends to the upper position of the left mold 200 and the right mold 300.

[0055] The punch 400 is located above the blank. When the left die 200 and the right die 300 are in contact with each other, the punch 400 is driven by the cold heading machine to perform cold heading impact on the blank to form the middle section 122 and the lower section 123 of the hexagonal flange bolt shank 120. A forming groove 401 is provided at the lower end of the punch 400. The structure of the forming groove 401 matches the structure of the middle section 122 and the lower section 123 of the shank 120. When the punch 400 is punched down, the cylindrical shank of the blank is deformed to adapt to the structure of the forming groove 401 until the middle section 122 and the lower section 123 are upset to a predetermined size, and the blank is deformed into a finished hexagonal flange bolt.

[0056] After the punch 400 forms the hexagonal flange bolt, the punch 400 is reset, the left die 200 and the right die 300 move away from each other, and the hexagonal flange bolt is not easy to automatically fall off from the die due to the impact force. The unloading assembly 500 is used to apply thrust to the hexagonal flange bolt to separate the hexagonal flange bolt from the die to complete rapid unloading.

[0057] The unloading assembly 500 includes a unloading rod 511. A unloading groove 203 that penetrates into the semicircular groove 202 is opened on the left mold 200. The unloading rod 511 is slidably inserted into the unloading groove 203. One end of the unloading rod 511 extends to the outside of the left mold 200, and a boss 512 is fixedly provided on the unloading rod 511 extending to the outside of the left mold 200. The diameter of the boss 512 is larger than the diameter of the unloading rod 511. A return spring 513 is sleeved on the rod body of the unloading rod 511. One end of the return spring 513 is fixedly connected to the outer wall of the left mold 200, and the other end of the return spring 513 is fixedly connected to the side wall of the boss 512 facing the left mold 200.

[0058] When the left mold 200 and the right mold 300 are in the mold closing abutment position, the end of the discharge rod 511 facing the right mold 300 is located in the discharge groove 203, and the return spring 513 is in a normal state; when the left mold 200 and the right mold 300 move away from each other, the end of the discharge rod 511 away from the right mold 300 is pressed against the cold heading machine table. As the left mold 200 moves, the end of the discharge rod 511 facing the right mold 300 simultaneously extends into the semicircular groove 202 of the left mold 200 and applies thrust to the hexagonal flange bolt. The hexagonal flange bolt is separated from the mold and falls to the bottom of the mold for collection. At this time, the return spring 513 is in a compressed state; then the left mold 200 and the right mold 300 approach each other again to carry out the mold closing processing of the next hexagonal flange bolt, and the discharge rod 511 retracts into the discharge groove 203 again, and the return spring 513 returns to a normal state.

[0059] In the present application, the insertion grooves 201 and the semicircular grooves 202 on the left mold 200 are symmetrically arranged in two groups. When one group of the insertion grooves 201 and the semicircular grooves 202 is worn to affect the precision, the other group can be used to process the hexagonal flange bolts to reduce the production loss cost. The structures of the right mold 300 and the left mold 200 are always arranged correspondingly, and the unloading components 500 are also arranged in two groups, and one group of unloading components 500 is arranged on the left mold 200, and the other group of unloading components 500 is arranged on the right mold 300. The two groups of unloading components 500 are arranged symmetrically.

[0060] The implementation principle of a cold heading die for hexagonal flange bolts in Example 1 of the present application is as follows: after the blank is formed into the head 100 and the flange 110 by the cold heading process, it is installed on the cold heading die to form the middle section 122 of the rod 120. The left die 200 and the right die 300 clamp the blank, and the head 100 and the flange 110 are embedded in the insertion groove 201. Then the punch 400 punches down to cold head the rod 120. The finished hexagonal flange bolt is separated from the cold heading die under the thrust of the unloading rod 511 and is subsequently subjected to the subsequent material collection process.

[0061] Example 2

[0062] The difference between this embodiment and embodiment 1 is that the structure of the unloading assembly 500 is different. Figure 4 and Figure 5 The left die 200 is provided with a discharge cavity 204, and the discharge assembly 500 is installed in the discharge cavity 204. The discharge assembly 500 includes an active rack 521, a transmission component 522, and a driven rack 523. The active rack 521 is slidably arranged in the discharge cavity 204, and the length direction of the active rack 521 is arranged parallel to the movement direction of the punch 400. One end of the active rack 521 extends to the outside of the left die 200 and faces the direction of the punch 400. A pressing plate 402 is fixedly connected to the outer wall of the punch 400. When the punch 400 is lifted and pressed on the blank, the pressing plate 402 will follow the movement, thereby pushing the active rack 521 to slide.

[0063] Reference Figure 5 and Figure 6 The transmission component 522 includes a driving gear 524, which is meshed with a driving rack 521. A first transmission shaft 525 is fixedly connected to the driving gear 524, and both ends of the first transmission shaft 525 are rotatably connected to the inner wall of the discharge chamber 204. An active spring 526 is fixedly connected to the end of the active rack 521 located in the discharge chamber 204, and the other end of the active spring 526 is fixedly connected to the inner wall of the discharge chamber 204.

[0064] A first bevel gear 527 is fixedly provided on the first transmission shaft 525, and the first bevel gear 527 is meshed with a second bevel gear 528 for transmission. The axes of the first bevel gear 527 and the second bevel gear 528 are vertically arranged, and a second transmission shaft 529 is coaxially fixedly provided on the second bevel gear 528, and the second transmission shaft 529 is rotatably connected in the discharge chamber 204. A ratchet 530 is also fixedly provided on the second transmission shaft 529, and the ratchet 530 includes a ratchet rod 531 and a ratchet tooth 532. The ratchet rod 531 is fixedly provided on the second transmission shaft 529 and rotates with the second transmission shaft 529. The ratchet tooth 532 is hinged on one side of the ratchet rod 531, and a ratchet wheel 533 is provided on the ratchet tooth 532.

[0065] The ratchet 533 is provided with a third transmission shaft 534, which is rotatably connected to the inside of the discharge chamber 204. A driven gear 535 is also fixed to the third transmission shaft 534, and the driven rack 523 is meshed with the driven gear 535. The discharge chamber 204 is connected to the semicircular groove 202 on the left mold 200, and the length direction of the driven rack 523 is perpendicular to the length direction of the active rack 521. The driven rack 523 is slidably connected to the discharge chamber 204, and one end of the driven rack 523 faces the direction of the semicircular groove 202. The other end of the driven gear 535 is fixed to a driven spring 536, which is fixed to the inner wall of the discharge chamber 204.

[0066] The implementation principle of Example 2 of the present application is: when the punch 400 punches down to form the rod 120 of the hexagonal flange bolt, the pressure plate 402 follows the movement, pushing the active rack 521 to move into the unloading chamber 204, the active spring 526 is compressed, the active gear 524 rotates, and the ratchet 532 slides on the ratchet 533 without driving the ratchet 533 to rotate.

[0067] After the punch 400 forms the rod 120, the punch 400 rises and resets, and at the same time, the left mold 200 and the right mold 300 move away from each other, the active rack 521 loses the thrust of the pressure plate 402, and slides in the opposite direction under the elastic force of the active spring 526, the active gear 524 rotates, the ratchet 532 on the pawl 530 drives the ratchet 533 to rotate, and the rotation of the ratchet 533 drives the third transmission shaft 534 and the driven gear 535 to rotate, the driven rack 523 extends into the semicircular groove 202, and the driven spring 536 is in an extended state, pushing the hexagonal flange bolt to drop the material. Then the driven spring 536 resets, driving the driven rack 523 to retract to the discharge chamber 204, waiting for the next blank mold closing process.

[0068] After the punch 400 completes processing of the blank, the punch 400 is reset, the left die 200 and the right die 300 are separated, and the unloading assembly 500 unloads the blank. Under the premise of improving the utilization rate of raw materials, the production rhythm is accelerated and the production efficiency is improved.

[0069] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A processing technology for hexagonal flange bolts, characterized in that: The following steps are involved: S1: Cutting the bar into multiple cylindrical blanks; S2: cold heading, cold heading the cylindrical blank, forming one end of the cylindrical blank into a hexagonal head (100) and a disc-shaped flange (110); S3: closing the mold, using a cold heading mold to close the mold and cold head the other end of the cylindrical blank, so that the other end of the cylindrical blank is formed into a rod portion (120) including an upper section (121), a middle section (122) and a lower section (123); S4: unloading, removing and collecting the formed hexagonal flange bolts from the cold heading die; A cold heading die, comprising a left die (200), a right die (300) and a punch (400); The left mold (200) is provided with an insertion groove (201), and the head (100) and the flange (110) of the hexagonal flange bolt are embedded and installed in the insertion groove (201), and the head (100) abuts against the lower inner wall of the insertion groove (201), and the flange (110) abuts against the upper inner wall of the insertion groove (201); the left mold (200) is also provided with a semicircular groove (202) connected with the insertion groove (201), and the upper section (121) of the hexagonal flange bolt is embedded and abutted in the semicircular groove (202); The structure of the right mold (300) is symmetrical with that of the left mold (200). When the left mold (200) and the right mold (300) are in contact with each other, the two semicircular grooves (202) form a circular hole. A forming groove (401) is formed at one end of the punch (400), and the structure of the forming groove (401) is matched with the middle section (122) and the lower section (123) of the rod (120); It also includes a discharge assembly (500), which is arranged on the left die (200) and is used to discharge the formed hexagonal flange bolt from the cold heading die; The discharge assembly (500) comprises a discharge rod (511), the left mold (200) is provided with a discharge groove (203) penetrating into the semicircular groove (202), the discharge rod (511) is slidably arranged in the discharge groove (203), and one end of the discharge rod (511) extends outward from the left mold (200); The left mold (200) is provided with a discharge cavity (204), and the discharge assembly (500) comprises a driving rack (521), a transmission component (522) and a driven rack (523) all arranged in the discharge cavity (204); An active rack (521), wherein the active rack (521) is slidably disposed in the discharge cavity (204), the length direction of the active rack (521) is parallel to the movement direction of the punch (400), and one end of the active rack (521) extends to the outside of the left die (200), and a pressing plate (402) is fixedly connected to the punch (400); A transmission component (522), the transmission component (522) comprising a driving gear (524) meshed with the driving rack (521), an active spring (526) fixed to one end of the driving rack (521), a first bevel gear (527) coaxially arranged with the driving gear (524), a second bevel gear (528) meshed with the first bevel gear (527), a ratchet pawl (530) coaxially arranged with the second bevel gear (528), a ratchet wheel (533) matched with the ratchet pawl (530), and a driven gear (535) coaxially arranged with the ratchet wheel (533); A driven rack (523), wherein the driven rack (523) is slidably arranged in the discharge chamber (204), the discharge chamber (204) and the semicircular groove (202) are connected, the length direction of the driven rack (523) is perpendicular to the length direction of the active rack (521), and the driven rack (523) is located on one side of the semicircular groove (202), the driven rack (523) and the driven gear (535) are meshed, one end of the driven rack (523) is fixedly connected to a driven spring (536), and the other end of the driven spring (536) is fixedly connected in the discharge chamber (204).

2. A processing technology for hexagonal flange bolts according to claim 1, characterized in that: The diameter of the cylindrical blank is the same as the diameter of the upper section (121) of the rod (120).

3. The processing technology for hexagonal flange bolts according to claim 1, characterized in that: A boss (512) is fixedly provided at one end of the discharge rod (511) extending to the outside of the left mold (200), and a return spring (513) is sleeved on the discharge rod (511), one end of the return spring (513) is fixedly connected to the outer side wall of the left mold (200), and the other end of the return spring (513) is fixedly connected to the boss (512).

4. The processing technology for hexagonal flange bolts according to claim 1, characterized in that: The insertion grooves (201) and the semicircular grooves (202) on the left mold (200) are each provided with two groups which are symmetrically arranged, and the right mold (300) is provided correspondingly. The discharge components (500) are also provided with two groups, and the two groups of discharge components (500) are arranged in a centrally symmetrical manner.

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