A cold heading forming device for bolt processing

Abstract

The present invention discloses a cold heading forming device for bolt processing, which includes a fixed seat, a movable seat, a punching die mechanism, an auxiliary transmission mechanism and a driving mechanism. A plurality of semi-circular grooves I arranged in an array and at least two positioning grooves are formed inside the fixed seat. A plurality of semi-circular grooves II and at least one positioning block are arranged inside the movable seat. The positioning block is in conformity with the shape of the positioning groove and is used for limiting the movable seat. The punching die mechanism is used for extruding the bolt blanks or bolt semi-finished products in each die. The auxiliary transmission mechanism is installed on the movable seat and is used for clamping the bolt blanks or bolt semi-finished products in the semi-die II. The driving mechanism is fixedly connected with the movable seat and is used for driving the movable seat to move. The present invention can realize continuous cold heading forming of bolts. Compared with the existing cold heading process, while maintaining the processing efficiency, it can also realize reliable conveying of bolt processing, reduce the risk of dropping during the bolt conveying process, and reduce the equipment and process costs.

Description

Technical Field

[0001] The present invention relates to a cold heading forming device, specifically a cold heading forming device for bolt processing. Background Art

[0002] The general process of the bolt cold heading process mainly includes the following steps: Material preparation: Select suitable materials, usually using high-quality steel as raw materials, and perform the required forging and heat treatment. Pretreatment: Perform pretreatment processes such as cutting and cleaning on the raw materials to remove surface dirt and oxides to ensure the materials are clean. Cold heading forming: Place the pretreated materials into a cold heading machine, and use the pressure and die of the cold heading machine to deform the materials within a limited space to achieve the formation of thread teeth. Surface treatment: Perform anti-corrosion treatment on the bolts, such as plating, phosphating, or galvanizing, etc., to increase their service life and corrosion resistance.

[0003] During cold heading forming, it is necessary to press the bolt blank into the die. After the processing of the bolt blank is completed, it is necessary to eject the bolt semi-finished product through a push rod, and then transfer the bolt semi-finished product to the next die. However, for some slender bolt semi-finished products, the resistance received by the push rod is relatively large, and it is prone to plastic bending during the process of ejecting the product, and there is a risk of the bolt falling during the elastic ejection of the bolt. The push rod not only needs to bear the plastic pressure of the bolt, but also needs to eject the bolt after plastic deformation from the die. And in order to prevent wear between the push rod and the die, the push rod is generally set as a slender rod. In this way, the requirements for the material properties of the push rod are higher, and the risk of the push rod being damaged is higher, which not only increases the cost of the equipment, but also increases the cost of equipment maintenance and operation. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a cold heading forming device for bolt processing, which solves the problems that when the existing bolt cold heading machine transfers the bolt semi-finished product, it is necessary to first eject the bolt semi-finished product from the die through an elastic push rod, resulting in a risk of the bolt falling, and during cold heading forming, the plastic effect of the push rod is poor and the equipment cost is increased.

[0006] (II) Technical Solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A cold heading forming device for bolt processing, including a fixed seat, a moving seat, a punching die mechanism, an auxiliary transmission mechanism, and a driving mechanism.

[0008] The interior of the fixed seat is provided with a plurality of semi-circular grooves 1 arranged in an array and at least two positioning grooves. A semi-mold 1 is installed in the semi-circular groove 1. The interior of the movable seat is provided with a plurality of semi-circular grooves 2 and at least one positioning block. The semi-circular groove 2 has the same structure as the semi-circular groove 1 and is opposite in position. A semi-mold 2 is installed in the semi-circular groove 2. The semi-mold 2 is arranged opposite to the semi-mold 1, and when the semi-mold 1 and the semi-mold 2 are fitted together, they jointly form a mold. The positioning block is in conformity with the shape of the positioning groove and is used to limit the position of the movable seat. The punching die mechanism is used to extrude the bolt blanks or bolt semi-finished products in each mold, and process the bolt blanks or bolt semi-finished products into bolt semi-finished products that conform to the shape of the corresponding mold. The auxiliary transmission mechanism is installed on the movable seat and is used to clamp the bolt blanks or bolt semi-finished products in the semi-mold 2. The driving mechanism is fixedly connected to the movable seat and is used to drive the movable seat to move.

[0009] The above cold heading forming equipment drives the movable seat to be completely fitted with the fixed seat through the driving mechanism, and starts the punching die mechanism to extrude and form the bolt blanks or semi-finished products in each mold. Subsequently, start the auxiliary transmission mechanism to clamp the bolt semi-finished products in the semi-mold 2, and start the driving mechanism again to move the movable seat away until the semi-mold 1 is opposite to the next semi-mold 2. Reset the auxiliary transmission mechanism so that the bolt semi-finished products in each semi-mold 2 fall into the lower semi-mold 1. The above cold heading forming equipment can realize continuous cold heading forming of bolts. Compared with the existing cold heading process, while maintaining the processing efficiency, it can also realize reliable conveying of bolt processing, reduce the risk of dropping during the bolt conveying process. At the same time, since there is no need to use a push rod to push out the bolts, the plasticity of the bolt tail is more complete and reliable, and there is no need to add additional processes, reducing the equipment and process costs.

[0010] Preferably, a limiting block is arranged on the fixed seat. The limiting block is used to limit the position of the movable seat so that when the punching die mechanism is extruding, the movable seat is in conformity with the fixed seat.

[0011] Preferably, the punching die mechanism includes a slider, a slide rail, a plurality of die cores and a linear driving component. The die cores are opposite to the semi-circular grooves 1 in position. The plurality of die cores are installed on the slider in an array. The slider is slidably connected to the slide rail. The linear driving component is fixedly connected to the slider and is used to drive the slider to move so that the die cores move into the corresponding molds to extrude and form the bolt blanks or bolt semi-finished products.

[0012] Preferably, the auxiliary transmission mechanism includes a motor, a rotating shaft, at least one support seat and a plurality of abutting components. The motor is installed on the movable seat. The support seat is fixedly connected to the movable seat. One end of the rotating shaft is fixedly connected to the motor, and the other end passes through the support seat and is rotatably connected to the support seat. The abutting components are fixedly connected to the rotating shaft, and each abutting component is correspondingly arranged outside the semi-circular groove 2 and is used to abut the bolt blanks or bolt semi-finished products in the semi-circular groove 2.

[0013] Preferably, the abutting assembly includes a connecting rod, a linear drive and a pressing block. One end of the connecting rod is fixedly connected to the rotating shaft, and the other end is fixedly connected to the fixed end of the linear drive. The moving end of the linear drive is fixedly connected to the pressing block. The motor is started to drive the connecting rod to rotate, and the linear drive and the pressing block are rotated into the second semi-circular groove. At the same time, the linear drive is started to drive the pressing block to abut against the bolt blank or the semi-finished bolt, so that the bolt blank or the semi-finished bolt is clamped in the second half-mold, and the clamping and conveying of the bolt are more reliable.

[0014] Preferably, the driving mechanism includes a robotic arm and a return spring. The moving end of the robotic arm is slidably connected to the moving seat and is used to drive the moving seat to approach or move away from the fixed seat. The return spring is fixedly connected between the robotic arm and the moving seat and is used to drive the moving seat to move away from the fixed seat.

[0015] The present invention also provides a processing method for a cold heading forming device for bolt processing, including the following steps:

[0016] S1: Convey a bolt blank into the first semi-circular groove.

[0017] S2: Start the driving mechanism to drive the moving seat to be relatively fitted with the fixed seat. The moving seat is limited by the positioning block and the positioning groove so that the moving seat just fits with the fixed seat, and each first half-mold and the second half-mold just form a mold.

[0018] S3: Start the die punching mechanism to extrude and form the bolt blank or the semi-finished bolt in each mold.

[0019] S4: After the die punching mechanism is reset, start the auxiliary transmission mechanism to clamp the bolt blank or the semi-finished bolt in each mold in the second semi-circular groove.

[0020] S5: Start the driving mechanism to drive the moving seat to the position where each second semi-circular groove is opposite to the next first semi-circular groove. After the distance between the moving seat and the fixed seat reaches a preset threshold value, the auxiliary transmission mechanism is reset to convey the bolt blank and the semi-finished bolt into the next first semi-circular groove respectively. Among them, the semi-finished bolt in the last first semi-circular groove is conveyed to the next process. Return to step S1.

[0021] (III) Beneficial effects

[0022] The present invention provides a cold heading forming device for bolt processing. It has the following beneficial effects:

[0023] (1). The present invention drives the moving seat to be completely attached to the fixed seat through a driving mechanism, and then starts the stamping die mechanism to extrude and form the bolt blanks or semi-finished products in each die. Subsequently, the auxiliary transmission mechanism is started to clamp the bolt semi-finished products in the second half die, and then the driving mechanism is started again to move the moving seat away until the first half die and the second half die below are in opposite positions. The auxiliary conveying mechanism is reset to make the bolt semi-finished products in each second half die fall into the first half die below. The above cold heading forming equipment can realize continuous cold heading forming of bolts. Compared with the existing cold heading process, while maintaining the processing efficiency, it can also realize reliable conveying of bolt processing, reduce the risk of dropping during bolt conveying, and at the same time, since there is no need to use a push rod to push out the bolts, the plasticity of the bolt tail is more complete and reliable, without the need to add additional processes, reducing equipment and process costs.

[0024] (2). When the moving seat is attached to the fixed seat, the present invention starts the motor to drive the connecting rod to rotate, rotates the linear driver and the pressing block into the second semi-circular groove, and at the same time starts the linear driver to drive the pressing block to abut against the bolt blank or bolt semi-finished product, so that the bolt blank or bolt semi-finished product is clamped in the second half die. Compared with the existing method of pushing out by a thimble and clamping by a transmission mechanism, the clamping of the present invention is more reliable, the transmission efficiency is higher, and the requirements for the material properties of the equipment are lower, and the equipment cost is less.

[0025] (3). When conveying the bolt semi-finished products, the robotic arm first moves upward to separate the moving seat from the fixed seat. Under the action of the spring, the moving seat not only moves upward, but also moves toward the side close to the stamping die mechanism, effectively preventing the bolt from wearing against the first half die. Subsequently, the robotic arm moves in the bolt conveying direction until the first half die is directly opposite the second half die below. The robotic arm controls the moving seat to move downward and releases the bolt semi-finished product when reaching the preset height, and it automatically falls into the second half die below. Since the moving seat still maintains a certain distance from the fixed seat at this time, the transmission process of the bolt semi-finished product is more accurate and reliable, which can effectively prevent the bolt from deviating from the second half die and is also more reliable for the next stamping forming. Brief Description of the Drawings

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the cold heading forming equipment for bolt processing according to the present invention;

[0027] Figure 2 is Figure 1 the three-dimensional structural schematic diagram of the fixed seat in

[0028] Figure 3 is Figure 1 the three-dimensional structural schematic diagram of the moving seat in

[0029] Figure 4 is Figure 1Schematic three-dimensional structure diagram when the first half die and the second half die are combined into a die;

[0030] Figure 5 is Figure 1 Schematic three-dimensional structure diagram of the middle punching die mechanism;

[0031] Figure 6 is Figure 1 Schematic three-dimensional structure diagram of the middle auxiliary transmission mechanism in the released state;

[0032] Figure 7 is Figure 1 Schematic three-dimensional structure diagram of the middle auxiliary transmission mechanism in the clamped state.

[0033] In the figure: 1. Fixed seat; 11. First semi-circular groove; 12. Positioning groove; 13. First half die; 14. Limit block; 2. Moving seat; 21. Second semi-circular groove; 22. Positioning block; 23. Second half die; 3. Punching die mechanism; 31. Slide block; 32. Slide rail; 33. Die core; 34. Linear drive assembly; 4. Auxiliary transmission mechanism; 41. Motor; 42. Rotating shaft; 43. Support seat; 44. Abutting assembly; 441. Connecting rod; 442. Linear driver; 443. Pressing block; 5. Drive mechanism; 51. Robot arm; 52. Return spring. Embodiment

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1: Please refer to Figure 1 , the present invention provides a technical solution: A cold heading forming device for bolt processing, including a fixed seat 1, a moving seat 2, a punching die mechanism 3, an auxiliary transmission mechanism 4 and a drive mechanism 5. Among them, the fixed seat 1 and the moving seat 2 together constitute a die seat for bolt forming. The punching die mechanism 3, as the main power component of the cold heading process, is used to extrude and form bolt blanks and bolt semi-finished products. The cold heading forming device operates in coordination with the refrigeration system, and the cold heading process is completed at room temperature. In this embodiment, the auxiliary transmission mechanism 4 and the drive mechanism 5 cooperate to convey the bolt semi-finished product to the next die after each extrusion. The bolt blank is a cylindrical metal blank after shearing, and can be made of copper, aluminum, carbon steel, alloy steel, stainless steel, titanium alloy, etc. The bolt semi-finished product is various shapes formed by the bolt blank during the cold heading process. Since the bolt still needs to be quenched, cleaned and other processes after cold heading, the bolts during the cold heading process are all called semi-finished products.

[0036] Please refer to Figure 2 , multiple semi-circular grooves one 11 arranged in an array and at least two positioning grooves 12 are provided inside the fixed seat 1. A semi-mold one 13 is installed in the semi-circular groove one 11. In this embodiment, the number of semi-circular grooves one 11 is set to 5. The first semi-circular groove one 11 along the processing and feeding direction is used as a pre-processing groove, and the remaining 4 semi-circular grooves one 11 are processing grooves. The pre-processing groove is only used to accommodate the bolt blank, and the semi-mold one 13 inside it is an overall hollow semi-cylindrical structure. The outer shapes of the 5 semi-molds one 13 are the same, but the cavities for forming inside are different, corresponding to different shapes of the bolt blank in the cold heading process of the bolt blank. Of course, in other embodiments, the number of semi-circular grooves one 11 can be more or less, and can be set according to the bolt blank and the bolt forming size, and all the semi-circular grooves one 11 can be used as processing grooves.

[0037] Please refer to Figures 3 - 4 , multiple semi-circular grooves two 21 and at least one positioning block 22 are provided inside the moving seat 2. The semi-circular groove two 21 has the same structure as the semi-circular groove one 11 and is opposite in position. A semi-mold two 23 is installed in the semi-circular groove two 21. The semi-mold two 23 is arranged opposite to the semi-mold one 13, and when the semi-mold one 13 and the semi-mold two 23 are attached, they jointly form a mold. In this embodiment, the semi-mold one 13 and the semi-mold two 23 are integrally formed with the fixed seat 1 and the moving seat 2 respectively, jointly forming a bolt processing mold of a specific size. The semi-mold one 13 and the semi-mold two 23 can both be made of metal materials such as high-speed steel and cemented carbide. In other embodiments, the semi-mold one 13 and the semi-mold two 23 can also be detachably connected, such as being installed in the corresponding semi-circular grooves one 11 and semi-circular grooves two 21 by screwing, clamping, etc. In this way, the mold can be replaced according to the bolt processing material and size by itself to meet the processing requirements of different models of bolts.

[0038] The positioning block 22 fits the shape of the positioning groove 12 and is used to limit the moving seat 2. In this embodiment, the positioning block 22 is set as a hemispherical block, and the corresponding positioning groove 12 is a hemispherical groove. When the moving seat 2 approaches the fixed seat 1 until it fits with the fixed seat 1, the positioning block 22 and the positioning groove 12 gradually fit, and through the mutual limitation of the positioning block 22 and the positioning groove 12, the moving seat 2 and the fixed seat 1 fit with each other.

[0039] In addition, a limit block 14 is provided on the fixed seat 1. The limit block 14 is used to limit the moving seat 2, so that when the punching die mechanism 3 is extruding, the moving seat 2 and the fixed seat 1 remain in fit. When the punching die mechanism 3 is performing stamping, the fixed seat 1 and the moving seat 2 are simultaneously stressed. By limiting the moving seat 2 through the limit block 14, the moving seat 2 and the fixed seat 1 are always kept stable, and the punching and extrusion process is more reliable.

[0040] Please refer to Figure 5, the punching die mechanism 3 is arranged opposite to the fixed seat 1 and is used to extrude the bolt blanks or bolt semi-finished products in each die, and process the bolt blanks or bolt semi-finished products into bolt semi-finished products that fit the shape of the corresponding die. In this embodiment, the fixed seat 1 and the moving seat 2 are arranged vertically opposite, and the fixed seat 1 is located below, while the punching die mechanism 3 is arranged horizontally opposite to the fixed seat 1. The bolt blanks pass through the dies on the fixed seat 1 and the moving seat 2 from front to back in sequence.

[0041] The punching die mechanism 3 includes a slider 31, a slide rail 32, a plurality of die cores 33 and a linear drive assembly. The die core 33 is located opposite to the semi-circular groove 11. The plurality of die cores 33 are arranged in an array on the slider 31. In this embodiment, the number of die cores 33 is set to 4, which are respectively arranged opposite to 4 processing grooves. One end of the die core 33 close to the fixed groove is set to be disc-shaped, and its radius is the same as the radius of the bolt head after the bolt is formed. Of course, in other embodiments, the number of die cores 33 can be more or less, and can be the same as the number of semi-circular grooves 11 or one less than the number of semi-circular grooves 11. The die core 33 can be made of diamond, high-speed steel, tungsten steel, etc., and can be selected according to the material of the bolt blank in actual processing operations.

[0042] The slider 31 is slidably connected to the slide rail 32, and the linear drive assembly is fixedly connected to the slider 31 and is used to drive the slider 31 to move, so that the die core 33 moves into the corresponding die to extrude and form the bolt blank or bolt semi-finished product. The linear drive assembly can adopt an electric telescopic rod, an electric cylinder, an electric screw rod assembly, etc.

[0043] Please refer to Figure 6 and Figure 7 , the auxiliary transmission mechanism 4 is installed on the moving seat 2 and is used to clamp the bolt blank or bolt semi-finished product in the semi-die 23.

[0044] The auxiliary transmission mechanism 4 includes a motor 41, a rotating shaft 42, at least one support seat 43, and a plurality of abutting components 44. The motor 41 is installed on the moving seat 2. The support seat 43 is fixedly connected to the moving seat 2. One end of the rotating shaft 42 is fixedly connected to the motor 41, and the other end passes through the support seat 43 and is rotatably connected to the support seat 43. In this embodiment, the number of support seats 43 is 5, and the rotating shaft 42 is rotatably connected to the support seat 43 through bearings. The motor 41 is a forward and reverse motor 41, and drives the rotating shaft 42 to rotate according to a set cycle.

[0045] The abutting component 44 is fixedly connected to the rotating shaft 42, and each abutting component 44 is correspondingly arranged outside the semi-circular groove 21 and is used to abut the bolt blank or bolt semi-finished product in the semi-circular groove 21. The abutting component 44 includes a connecting rod 441, a linear driver 442 and a pressing block 443. One end of the connecting rod 441 is fixedly connected to the rotating shaft 42, and the other end is fixedly connected to the fixed end of the linear driver 442. The moving end of the linear driver 442 is fixedly connected to the pressing block 443.

[0046]

[0046] The method for the auxiliary drive mechanism 4 to clamp the bolt blank or semi-finished bolt is as follows: when the moving seat 2 is in contact with the fixed seat 1, the bolt blank or semi-finished bolt is just bisected by the moving seat 2 and the fixed seat 1, that is, half of the bolt blank or semi-finished bolt is within the half die 13, and the other half is within the half die 23. At this time, start the motor 41 to drive the connecting rod 441 to rotate, rotate the linear driver 442 and the pressing block 443 into the semi-circular groove 21, and at the same time start the linear driver 442 to drive the pressing block 443 to abut against the bolt blank or semi-finished bolt, then the bolt blank or semi-finished bolt is clamped within the half die 23.

[0047]

[0047] The drive mechanism 5 is fixedly connected to the moving seat 2 and is used to drive the moving seat 2 to move. The drive mechanism 5 includes a robotic arm 51 and a return spring 52. The moving end of the robotic arm 51 is slidably connected to the moving seat 2 and is used to drive the moving seat 2 to approach or move away from the fixed seat 1. The return spring 52 is fixedly connected between the robotic arm 51 and the moving seat 2 and is used to drive the moving seat 2 to move away from the fixed seat 1. First, the robotic arm 51 moves upward to separate the moving seat 2 from the fixed seat 1. Under the action of the spring, the moving seat 2 not only moves upward but also moves toward the side close to the die-casting mechanism 3. Subsequently, the robotic arm 51 moves in the bolt conveying direction until the half die 13 is directly opposite the lower half die 23. The robotic arm 51 controls the moving seat 2 to move downward and releases the bolt semi-finished product at a preset height, and it automatically drops into the lower half die 23. Since the moving seat 2 still maintains a certain distance from the fixed seat 1 at this time, the head of the bolt semi-finished product can effectively fall into the head of the half die 23, avoiding interference between its head and the tail of the half die 23. Of course, in other embodiments, the bolt semi-finished product can also be released when the moving seat 2 is in full contact with the fixed seat 1. Such a transfer is more reliable, but it will increase the stroke and reduce the processing efficiency.

[0048] In the actual cold heading process, the moving seat 2 and the fixed seat 1 are initially in a separated state. The bolt blanks are placed in the first half die 13 by an external conveying device or mechanical claws, while the bolt semi-finished products after cold heading stamping are placed in the other half dies 13. At this time, start the robotic arm 51 to drive the moving seat 2 to be fully fitted with the fixed seat 1, and then start the die pressing mechanism 3 to extrude and form the bolt blanks or semi-finished products in each die. The die pressing mechanism 3 as a whole adopts intermittent reciprocating stamping, resetting and staying briefly after each extrusion forming. At this time, start the auxiliary transmission mechanism 4 to clamp the bolt semi-finished products in the second half die 23, and start the robotic arm 51 again to move the moving seat 2 away until the first half die 13 is opposite to the next second half die 23. At this time, the first half die 13 is empty and not opposite to the moving seat 2, and bolt blanks can be conveyed into it. Reset the auxiliary conveying mechanism to make the bolt semi-finished products in each second half die 23 fall into the lower first half die 13. Since the last second half die 23 is not opposite to the fixed seat 1, the bolt semi-finished products that have completed the cold heading process directly fall onto the next process or discharging device. The cold heading forming equipment repeats the above process to realize continuous cold heading forming of bolts. Compared with the existing cold heading process, the cold heading forming equipment of this embodiment realizes reliable conveying of bolt processing while maintaining the processing efficiency, reduces the risk of dropping during bolt conveying, and at the same time, since there is no need to use a push rod to push out the bolts, the plasticity of the bolt tail is more complete and reliable, and no additional process is required.

[0049] Embodiment 2: This embodiment provides a processing method for a cold heading forming equipment for bolt processing, which can be applied to the cold heading forming equipment for bolt processing in Embodiment 1. The processing method includes the following steps:

[0050] S1: Convey bolt blanks into the first semi-circular groove 11. The conveying process can adopt two methods: manual placement or automatic machine placement. When using manual placement, the bolt blanks are arranged in an orderly manner on the guiding seat and distributed along the first semi-circular groove 11 away from the fixed seat 1. The guiding seat is inclined, and they roll into the first semi-circular groove 11 in sequence under the action of gravity. This not only saves manpower but also speeds up the manual feeding efficiency, which is sufficient to ensure the efficiency of the cold heading process. When using machine placement, mechanical claws or conveyor belts can be used for individual placement.

[0051] S2: Start the driving mechanism 5 to drive the moving seat 2 to be relatively fitted with the fixed seat 1. Limit the moving seat 2 through the positioning block 22 and the positioning groove 12 so that the moving seat 2 just fits well with the fixed seat 1, and each first half die 13 and the second half die 23 just form a die. Under the dual action of the limiting block 14 and the positioning block 22, the moving seat 2 and the fixed seat 1 are completely fitted, realizing the same or similar performance as an integral die, and ensuring the reliability of bolt cold heading forming.

[0052] S3: Start the stamping die mechanism 3 to extrude and form the bolt blanks or semi-finished bolt products located in each die. Compared with the existing die that uses ejector pins to remove the semi-finished bolt products, in this embodiment, the movable seat 2 and the fixed seat 1 are fitted to form the die, which is more reliable for the structure of both ends of the bolt to be formed and causes less wear to the die itself. It not only eliminates the need to install high-cost ejector pins but also extends the service life of the die.

[0053] S4: After the stamping die mechanism 3 is reset, start the auxiliary transmission mechanism 4 to clamp the bolt blanks or semi-finished bolt products in each die within the semi-circular groove two 21. Compared with the existing method of using ejector pins to remove the semi-finished bolt products and then using an external transmission mechanism for transmission, it is more reliable to use the auxiliary transmission mechanism 4 to clamp the bolts, avoiding the risk of the bolt falling due to excessive ejector pin elasticity. At the same time, it also avoids the risk of wear between the bolt and the external transmission mechanism when the external transmission mechanism clamps the bolt and simultaneously performs stamping and shaping.

[0054] S5: Start the drive mechanism 5 to drive the movable seat 2 to a position where each semi-circular groove two 21 is opposite to the next semi-circular groove one 11. After the distance between the movable seat 2 and the fixed seat 1 reaches the preset threshold, the auxiliary transmission mechanism 4 is reset to convey the bolt blanks and semi-finished bolt products into the next semi-circular groove one 11 respectively. Among them, the semi-finished bolt product in the last semi-circular groove one 11 is conveyed to the next process. Return to step S1. Similar to the existing cold heading machine, in the cold heading processing method of this embodiment, the stamping die and the movable seat 2 are reset synchronously. During the interval time when the stamping die mechanism 3 is reset, feeding and conveying the bolts are carried out synchronously to maintain the high-efficiency operation of the cold heading equipment, realize the uninterrupted bolt cold heading process, and maintain high-quality and high-yield bolt production.

[0055] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold heading forming device for bolt processing, characterized in that, it includes: A fixed seat (1) with a plurality of semi-circular grooves one (11) arranged in an array and at least two positioning grooves (12) opened inside; a semi-mold one (13) is installed in the semi-circular groove one (11); A moving seat (2) with a plurality of semi-circular grooves two (21) and at least one positioning block (22) arranged inside; the semi-circular groove two (21) has the same structure as the semi-circular groove one (11) and is opposite in position; a semi-mold two (23) is installed in the semi-circular groove two (21); the semi-mold two (23) is arranged opposite to the semi-mold one (13), and when the semi-mold one (13) and the semi-mold two (23) are fitted together, they jointly form a mold; the positioning block (22) is in the same shape as the positioning groove (12) and is used to limit the moving seat (2); A punching die mechanism (3) for extruding the bolt blank or bolt semi-finished product in each mold to process the bolt blank or bolt semi-finished product into a bolt semi-finished product that fits the shape of the corresponding mold; An auxiliary transmission mechanism (4) installed on the moving seat (2) for clamping the bolt blank or bolt semi-finished product in the semi-mold two (23); A driving mechanism (5) fixedly connected to the moving seat (2) for driving the moving seat (2) to move; the driving mechanism (5) is used to drive the moving seat (2) to move to be relatively fitted with the fixed seat (1) so that each semi-mold one (13) and semi-mold two (23) just form a mold; the driving mechanism (5) is used to drive the moving seat (2) to make each semi-circular groove two (21) opposite to the next semi-circular groove one (11) in position; the driving mechanism (5) includes a robotic arm (51) and a return spring (52), the moving end of the robotic arm (51) is slidably connected to the moving seat (2) for driving the moving seat (2) to approach or move away from the fixed seat (1); the return spring (52) is fixedly connected between the robotic arm (51) and the moving seat (2) for driving the moving seat (2) to move away from the fixed seat (1) side.

2. A cold heading forming device for bolt processing according to claim 1, characterized in that: A limiting block (14) is arranged on the fixed seat (1); the limiting block (14) is used to limit the moving seat (2) so that when the punching die mechanism (3) is extruding, the moving seat (2) fits with the fixed seat (1).

3. A cold heading forming device for bolt processing according to claim 1, characterized in that: The punching die mechanism (3) includes a slider (31), a slide rail (32), a plurality of die cores (33) and a linear drive assembly; the die cores (33) are opposite to the position of the first semi-circular groove (11); the plurality of die cores (33) are arrayed and installed on the slider (31); the slider (31) is slidably connected to the slide rail (32); the linear drive assembly is fixedly connected to the slider (31) and is used to drive the slider (31) to move, so that the die cores (33) move into the corresponding die to extrude and form bolt blanks or bolt semi-finished products.

4. A cold heading forming device for bolt processing according to claim 1, characterized in that: The auxiliary transmission mechanism (4) includes a motor (41), a rotating shaft (42), at least one support seat (43), and a plurality of abutting components (44); the motor (41) is installed on the moving seat (2); the support seat (43) is fixedly connected to the moving seat (2); one end of the rotating shaft (42) is fixedly connected to the motor (41), and the other end passes through the support seat (43) and is rotatably connected to the support seat (43); the abutting components (44) are fixedly connected to the rotating shaft (42), and each abutting component (44) is correspondingly arranged outside the second semi-circular groove (21) for abutting the bolt blank or bolt semi-finished product in the second semi-circular groove (21).

5. A cold heading forming device for bolt processing according to claim 4, characterized in that: The abutting component (44) includes a connecting rod (441), a linear driver (442) and a pressing block (443); one end of the connecting rod (441) is fixedly connected to the rotating shaft (42), and the other end is fixedly connected to the fixed end of the linear driver (442); the moving end of the linear driver (442) is fixedly connected to the pressing block (443).

6. A processing method of a cold heading forming device for bolt processing, applied to the cold heading forming device for bolt processing according to any one of claims 1 to 5, characterized in that, the processing method includes the following steps: S1: Convey the bolt blank into the first semi-circular groove (11). S2: Start the driving mechanism (5) to drive the moving seat (2) to be relatively fitted with the fixed seat (1); limit the moving seat (2) through the positioning block (22) and the positioning groove (12) so that the moving seat (2) just coincides with the fixed seat (1), and each first half die (13) and the second half die (23) just form a die. S3: Start the punching die mechanism (3) to extrude and form the bolt blank or bolt semi-finished product in each die. S4: After the punching die mechanism (3) is reset, start the auxiliary transmission mechanism (4) to clamp the bolt blank or bolt semi-finished product in each die in the second semi-circular groove (21). S5: Start the driving mechanism (5) to drive the moving seat (2) to a position where each second semi-circular groove (21) is opposite to the next first semi-circular groove (11). After the distance between the moving seat (2) and the fixed seat (1) reaches a preset threshold, the auxiliary transmission mechanism (4) resets to convey the bolt blanks and bolt semi-finished products into the next first semi-circular groove (11) respectively. Among them, the bolt semi-finished product in the last first semi-circular groove (11) is conveyed to the next process; return to step S1.

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