Cold heading equipment and process for preparing high-strength bolt

Abstract

The invention relates to the technical field of machining, and one embodiment of the invention provides cold heading equipment and process for preparing a high-strength bolt. The cold heading equipment comprises a base, a supporting plate is installed on the right side of the inner wall of the base, a tool rest is installed on the left side of the top of the supporting plate, and three sets of auxiliary frames and two sets of feeding frames are installed on the top of the supporting plate; two sets of auxiliary guide wheels are rotationally installed in the auxiliary frame, and two sets of material conveying rollers are rotationally installed in the feeding frame. According to the device, the first supporting cylinder and the first supporting column are used for horizontally guiding and supporting the stamping die, the connecting rod is hinged between the stamping die and the sliding plate, so that when the hydraulic cylinder drives the sliding plate and the cutter to cut materials downwards, the stamping die can automatically give way leftwards, and a metal blank can conveniently and automatically enter a material preparation position on the supporting seat after being cut off; therefore, after the cutter is reset upwards, the stamping die can automatically push the metal blank into the inner cavity of the cavity die and finish cold heading forming.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the field of mechanical processing technology, and in particular, to a cold heading device and process for preparing high-strength bolts. Background Art

[0002] A bolt is a fastener that, when used with a nut, is used to fix two components with through holes. This process is called bolting. High-strength bolts are generally made by cold heading by cutting the metal blank into specified sizes and then extruding it to produce plastic deformation and forming in the inner cavity of the mold. In the existing technology, the cold heading equipment used to prepare high-strength bolts is basically highly automated when working, that is, automatic feeding, cutting, cold heading and extrusion molding are completed in one go. However, there are still some shortcomings in this process: the metal blank is generally a wire-like steel after winding, which enters the cold heading equipment for cutting, but the existing technology generally only has one set of feeding channels, which means that in one processing cycle, only one set of blanks can be cut, one cut blank can be produced, and one set of bolts can be formed. For automated production, the efficiency is relatively low, and the cold heading extrusion assembly that cooperates with the cutting assembly needs to be equipped with a special clamp to clamp the cut blank and send it into the mold for pre-installation. This process is relatively complicated and prone to errors, so it is urgent to solve it. Summary of the Invention

[0003] To overcome the above-mentioned defects, the embodiments of the present disclosure provide a cold heading device and process for preparing high-strength bolts, which solves the technical problem of low processing efficiency in the prior art.

[0004] The present invention discloses a cold heading device for preparing high-strength bolts, comprising: A base, a support plate is installed on the right side of the inner wall of the base, a tool holder is installed on the left side of the top of the support plate, three groups of auxiliary frames and two groups of feed frames are installed on the top of the support plate, two groups of auxiliary guide wheels are rotatably installed inside the auxiliary frames, two groups of transport rollers are rotatably installed inside the feed frames, three groups of adapter grooves are opened on the outer surface of the transport rollers, and metal blanks are clamped between the transport rollers and the auxiliary guide wheels; The bracket is mounted on the top of the base, a hydraulic cylinder is mounted on the top of the bracket, a slide is mounted on the telescopic end of the hydraulic cylinder, a cutter is mounted on the right side of the bottom of the slide, a connecting plate is fixedly connected to the left side of the bottom of the slide, a support tube 1 and a support column 2 are fixedly mounted on the left side of the inner wall of the base, a support tube 2 is slidably mounted on the outer surface of the support column 2, a fixing frame is fixedly mounted on the right end of the support tube 2, and an adapter plate is fixedly mounted on the inner wall of the fixing frame; A support column 1 is slidably installed inside the support cylinder 1, a stamping die is fixedly installed on the right end of the support column 1, a connecting rod is hinged between the slide plate and the stamping die, a pillar is fixedly installed inside the base, and a cavity mold is movably installed on the outer surface of the pillar.

[0005] Preferably, the two groups of feeding racks are respectively located on the left and right sides of the auxiliary rack, and the three groups of auxiliary racks are equidistantly distributed front to back. The front ends of the transport rollers on the left are fixedly installed with mutually meshing gears, and a motor is installed on the back of the feeding rack on the left, and the output shaft of the motor is fixedly connected to the transport rollers on the upper side.

[0006] Preferably, a second spring is movably sleeved inside the second support tube, and both ends of the second spring are elastically connected to the fixed frame and the second support column respectively.

[0007] Preferably, the bottom of the connecting plate is adapted to be snapped onto the inner wall of the fixed frame, an abutment plate is provided on the right side of the bottom of the connecting plate, an adapter plate is fixedly installed on the upper part of the right side of the inner wall of the fixed frame, the abutment plate and the adapter plate are adapted to abut against each other, and the top of the abutment plate and the bottom of the adapter plate are both provided with inclined surfaces that adapt to and abut against each other.

[0008] Preferably, a rubber pad is glued to the right side of the fixing frame, and the left end of the metal blank abuts against the rubber pad.

[0009] Preferably, three groups of guide plates are fixedly installed on the bottom of the right side of the fixing frame, and each group of guide plates corresponds to a group of metal blanks.

[0010] Preferably, three groups of telescopic rods are installed at the bottom of the inner wall of the base, and the telescopic ends of the telescopic rods are fixedly installed with support seats, and the support seat is located at the lower left of the stamping die.

[0011] Preferably, a spring 1 is elastically connected between the top of the cavity mold and the bottom of the support plate. The tension generated by the spring 1 when stretched can pull the cavity mold upward and keep the top of the cavity mold at a rotational inclination angle greater than 2° with the horizontal plane.

[0012] Preferably, the second spring is stretched and arranged in the inner cavity of the second supporting tube, and the second spring generates a leftward pulling force on the fixing frame, so that the fixing frame always has a tendency to move leftward.

[0013] A process for preparing a cold heading device for high-strength bolts comprises the following steps: S1. Insert the three sets of metal blanks into their corresponding transport rollers and auxiliary guide wheels, so that the left end of the metal blank passes between the cutter and the adapter plate; S2. Start the motor and drive the transport roller to rotate, driving the metal blank to move continuously to the left, so that the left end of the metal blank contacts the rubber pad; S3. Start the hydraulic cylinder and drive the slide, cutter, connecting plate and connecting rod downward to move the cutter to cut off the left end of the metal blank on the left side of the tool holder; S4. The connecting plate drives the abutment plate downward to the bottom of the adapter plate, so that the fixed frame moves to the left under the tension of the spring two, and pulls the distance between the rubber pad and the metal blank, and the cut metal blank falls down; S5. The connecting rod moves downward and rotates, thereby driving the stamping die and the support column to move synchronously to the left, the stamping die is separated from the contact with the cavity die, and the cavity die begins to rotate downward around the axis of the support column by several angles; S6. The cut metal billet falls downward onto the support base, the telescopic rod is activated and drives the support base downward, so that the metal billet falling on the support base rises to a specified height; S7. The hydraulic cylinder is activated, driving the slide, cutter, connecting plate, and connecting rod upward. The connecting rod is driven to rotate, simultaneously driving the support column and the stamping die to move to the right. When the right side of the stamping die pushes the right end of the cut metal blank into the cavity of the mold and abuts the left side of the support base, the telescopic rod is activated to drive the support base downward and away from the stamping die. S8. The stamping die moves to the right and squeezes the metal blank entering the cavity of the die, causing it to undergo plastic deformation and ultimately form the blank. At this point, the slide and cutter move upward to their highest point. S9. The connecting plate drives the abutting plate to move back to the position where it abuts against the adapter plate, and resets the fixing frame to the right.

[0014] The beneficial effects of the embodiments of the present disclosure are: 1. This device has been redesigned to complete the synchronous cold heading processing of three groups of metal blanks at one time, greatly improving the working efficiency of the device. To achieve the above purpose, this application sets up two groups of feed racks and three groups of auxiliary racks located between the two groups of feed racks. The three groups of auxiliary racks are equidistantly distributed front and back. Two groups of transport rollers are rotatably installed inside the feed racks, driven by a motor and rotate synchronously under the transmission of gears, so that the equipment can process three groups of metal blanks at one time. The number of auxiliary racks and adapter slots can even be increased according to actual needs. When the material transport roller rotates, it adapts and clamps the outer surface of the metal blank through the adaption groove, assisting the automatic feeding of the metal blank, and using the support cylinder and support column to provide horizontal guiding support for the stamping die. The connecting rod is hinged between the stamping die and the slide plate, so that when the hydraulic cylinder drives the slide plate and the cutter to cut the material downward, the stamping die can automatically make way to the left, so that the metal blank can automatically enter the preparation position on the support seat after being cut off. After the cutter is reset upward, the stamping die can automatically push the metal blank into the inner cavity of the cavity die and complete the cold heading forming.

[0015] 2. This device has redesigned the cutting module, which is mainly composed of a hydraulic cylinder, a slide plate, a cutter, a knife holder, a fixed frame, an adapter plate, a connecting plate, abutment plate, a second support column, a second support cylinder and a second spring. The cutting module has two working modes. Mode 1: The abutment plate set at the bottom of the connecting plate abuts against the adapter plate, and the second support column and the second support cylinder are used to support the entire fixed frame in horizontal sliding, so that the fixed frame and the rubber pad are in a fixed state at this time. In this way, the metal blank can determine the cutting size by abutting against the rubber pad during automatic feeding; and Mode 2: Second: The slide plate, cutter and connecting plate are driven downward by the hydraulic cylinder. At this time, the cutter executes the cutting program. In order to facilitate the rapid blanking of the metal blank, an abutment plate is designed at the bottom of the connecting plate. When the abutment plate moves downward to the bottom of the adapter plate, the gap between the side of the connecting plate and the adapter plate allows the fixed frame to move to the left as a whole. The spring 2 located inside the second support tube pulls the fixed frame to the left, thereby pulling the rubber pad away from the metal blank. At this time, the cut metal blank can be blanked smoothly, enhancing the practicality of the device.

[0016] 3. The discharge part of this device has also been redesigned to improve the reliability of the device. The fixed cavity mold is mainly designed to be rotatable, and the support is provided by the pillar to make the cavity mold always have a counterclockwise rotation trend on the outer surface of the pillar. Under the action of this trend: when the stamping mold is separated from the cavity mold, the bending moment generated by the gravity of the cavity mold itself is used to rotate downward, so that the cavity mold as a whole is tilted, so that the forming bolts in the inner cavity of the cavity mold automatically fall downward, thereby completing the discharge, and the spring is responsible for offsetting part of the bending moment and gravity of the stamping mold to avoid excessive rotation angle of the cavity mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly describes the drawings required for use in describing the embodiments of the present disclosure. Obviously, the drawings described below are merely some exemplary embodiments of the present disclosure. Those skilled in the art can, without inventive effort, derive other drawings based on the content of the exemplary embodiments of the present disclosure and these drawings.

[0018] Figure 1 This is a schematic diagram of the front appearance of the overall structure of the present invention; Figure 2 It is a schematic top view of the overall structure of the present invention; Figure 3 It is a front cutaway schematic diagram of the overall structure of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at center A; Figure 5This is a schematic structural diagram of the cutter, metal blank, auxiliary frame, auxiliary guide wheel, feed frame, transport roller, support column 2, support cylinder 2 and fixed frame of the present invention; Figure 6 Schematic diagram of the separation of the punching die, support, cavity die, spring 1, telescopic rod and support base of the present invention; Figure 7 This is a schematic diagram of the separation of the fixing frame, the adapting plate, the connecting plate, the abutting plate, the rubber pad and the guide plate of the present invention.

[0019] Among them: 1. Base; 2. Bracket; 3. Hydraulic cylinder; 4. Slide plate; 5. Cutter; 6. Metal blank; 7. Auxiliary frame; 8. Auxiliary guide wheel; 9. Feed rack; 10. Transport roller; 11. Gear; 12. Motor; 13. Adapter slot; 14. Support cylinder 1; 15. Support column 1; 16. Stamping die; 17. Connecting rod; 18. Support column 2; 19. Support cylinder 2; 20. Fixed frame; 21. Adapter plate; 22. Connecting plate; 221. Abutment plate; 23. Rubber pad; 24. Guide plate; 25. Pillar; 26. Cavity mold; 27. Spring 1; 28. Telescopic rod; 29. ​​Support seat; 30. Support plate; 31. Tool holder; 32. Spring 2. DETAILED DESCRIPTION

[0020] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure.

[0021] To simplify the drawings, only the parts relevant to the disclosure are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0022] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0023] In the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is at a lower level than the second feature.

[0024] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present disclosure.

[0025] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] like Figures 1 to 7 As shown, it shows a cold heading device for preparing high-strength bolts disclosed in the present invention, comprising: The base 1 has a support plate 30 installed on the right side of the inner wall of the base 1, a tool holder 31 installed on the left side of the top of the support plate 30, three sets of auxiliary frames 7 and two sets of feed frames 9 installed on the top of the support plate 30, two sets of auxiliary guide wheels 8 are rotatably installed inside the auxiliary frames 7, and two sets of transport rollers 10 are rotatably installed inside the feed frames 9. The outer surface of the transport rollers 10 is provided with three sets of adapting grooves 13, and a metal blank 6 is clamped between the transport rollers 10 and the auxiliary guide wheels 8; The bracket 2 is mounted on the top of the base 1. A hydraulic cylinder 3 is mounted on the top of the bracket 2. A slide 4 is mounted on the telescopic end of the hydraulic cylinder 3. A cutter 5 is mounted on the right side of the bottom of the slide 4. A connecting plate 22 is fixedly connected to the left side of the bottom of the slide 4. A support cylinder 14 and a support column 2 18 are fixedly mounted on the left side of the inner wall of the base 1. A support cylinder 2 19 is slidably mounted on the outer surface of the support column 2 18. A fixing frame 20 is fixedly mounted on the right end of the support cylinder 2 19. An adapter plate 21 is fixedly mounted on the inner wall of the fixing frame 20. A support column 15 is slidably mounted inside the support cylinder 14, a stamping die 16 is fixedly mounted on the right end of the support column 15, a connecting rod 17 is hinged between the slide plate 4 and the stamping die 16, a support column 25 is fixedly mounted inside the base 1, and a cavity die 26 is movably mounted on the outer surface of the support column 25; The present device has been redesigned to complete the synchronous cold heading processing of three groups of metal blanks 6 at one time, which greatly improves the working efficiency of the device. In order to achieve the above purpose, the present application sets up two groups of feed racks 9 and three groups of auxiliary racks 7 located between the two groups of feed racks 9. The three groups of auxiliary racks 7 are equidistantly distributed front and back. Two groups of transport rollers 10 are installed and rotated inside the feed rack 9. They are driven by a motor 12 and rotate synchronously under the transmission of a gear 11, so that the equipment can process three groups of metal blanks 6 at one time. The number of auxiliary racks 7 and adapter slots 13 can even be increased according to actual needs. When the transport rollers 10 rotate, the feed rollers 10 rotate. At the same time, the outer surface of the metal blank 6 is adapted and clamped by the adapting groove 13 to assist the automatic feeding of the metal blank 6, and the support cylinder 14 and the support column 15 are used to horizontally guide and support the stamping die 16. The connecting rod 17 is used between the hinged stamping die 16 and the slide 4, so that when the hydraulic cylinder 3 drives the slide 4 and the cutter 5 to cut the material downward, the stamping die 16 can automatically make way to the left, so that the metal blank 6 can automatically enter the preparation position on the support seat 29 after being cut, so that after the cutter 5 is reset upward, the stamping die 16 can automatically push the metal blank 6 into the inner cavity of the cavity die 26 and complete the cold heading forming.

[0027] In this embodiment, the two groups of feed racks 9 are respectively located on the left and right sides of the auxiliary rack 7, and the three groups of auxiliary racks 7 are equidistantly distributed front and back. The front ends of the material transport rollers 10 on the left are fixedly mounted with mutually meshing gears 11, and a motor 12 is mounted on the back of the left feed rack 9. The output shaft of the motor 12 is fixedly connected to the material transport roller 10 on the upper side. like Figure 2 、 Figure 5 As shown, two sets of auxiliary guide wheels 8 are rotatably installed inside each set of auxiliary frames 7, and the number of auxiliary frames 7 corresponds to the number of metal blanks 6, and the number of adaptation slots 13 also corresponds to the number of metal blanks 6. From the perspective of adaptability, the number of adaptation slots 13 and auxiliary frames 7 can be modified according to production and capacity requirements.

[0028] In this embodiment, the second spring 32 is movably sleeved inside the second support tube 19, and the two ends of the second spring 32 are elastically connected to the fixed frame 20 and the second support column 18 respectively; The present device has redesigned the cutting module, which is mainly composed of a hydraulic cylinder 3, a slide plate 4, a cutter 5, a tool holder 31, a fixed frame 20, an adapter plate 21, a connecting plate 22, an abutting plate 221, a second support column 18, a second support cylinder 19 and a second spring 32. The cutting module has two working modes. Mode 1: The abutting plate 221 provided at the bottom of the connecting plate 22 abuts against the adapter plate 21, and the second support column 18 and the second support cylinder 19 are used to horizontally slide the fixed frame 20 as a whole, so that the fixed frame 20 and the rubber pad 23 are in a fixed state at this time. In this way, the metal blank 6 can be cut to a size by abutting against the rubber pad 23 during automatic feeding; Mode 2: The slide plate 4, the cutter 5 and the connecting plate 22 are driven downward by the hydraulic cylinder 3. At this time, the cutter 5 executes the cutting program. In order to facilitate the rapid blanking of the metal blank 6, an abutment plate 221 is designed at the bottom of the connecting plate 22. When the abutment plate 221 moves downward to the bottom of the adapter plate 21, the fixed frame 20 as a whole can move to the left through the gap between the side of the connecting plate 22 and the adapter plate 21. The fixed frame 20 is pulled to the left by the spring 2 32 located inside the support tube 2 19, so that the rubber pad 23 is pulled away from the metal blank 6. At this time, the cut metal blank 6 can be blanked smoothly, enhancing the practicality of the device.

[0029] In this embodiment, the bottom of the connecting plate 22 is adapted to be snapped onto the inner wall of the fixed frame 20. An abutment plate 221 is provided on the right side of the bottom of the connecting plate 22. The upper portion of the right side of the inner wall of the fixed frame 20 is fixedly mounted with the adapter plate 21. The abutment plate 221 is adapted to abut against the adapter plate 21. The top of the abutment plate 221 and the bottom of the adapter plate 21 are both provided with inclined surfaces adapted to abut against each other. like Figure 3 、 Figure 4 As shown, when the cutter 5 is not executing the cutting program, the cutter 5 and the connecting plate 22 are both at the top. At this time, the abutment plate 221 abuts against the adapter plate 21, and the fixed frame 20 and the rubber pad 23 are in a fixed state as a whole. This design enables the hydraulic cylinder 3 to determine the size of the metal blank 6 that needs to be cut when it is driven to the left to the cutting position. When the hydraulic cylinder 3 drives the slide plate 4, the cutter 5 and the connecting plate 22 to move downward, at this time, the metal blank 6 is cut by the cutter 5, and a part of the leftmost end of the metal blank 6 is required to place the cutter 5 to avoid premature deformation of the cut part of the metal blank 6. At this time, since the abutment plate 221 moves downward and no longer abuts against the adapter plate 21, the fixed frame 20 as a whole moves a distance to the left under the action of the spring 2 32, and provides falling space for the cut part of the metal blank 6.

[0030] In this embodiment, a rubber pad 23 is glued to the right side of the fixing frame 20, and the left end of the metal blank 6 abuts against the rubber pad 23; The rubber pad 23 is responsible for abutting against the left end of the metal blank 6. When the metal blank 6 is automatically driven to the left by the motor 12, the transport roller 10 and the auxiliary guide wheel 8 to the cutting area, the left end of the metal blank 6 begins to abut against the surface of the rubber pad 23, and the flexible and compressible characteristics of the rubber pad 23 increase the cutting redundancy for the metal blank 6.

[0031] In this embodiment, three sets of guide plates 24 are fixedly installed on the bottom of the right side of the fixing frame 20, and each set of guide plates 24 corresponds to a set of metal blanks 6; The guide plates 24 are located below the rubber pads 23 , with a total of three groups corresponding to the three groups of metal blanks 6 . Their function is to guide the cut metal blanks 6 to ensure that the metal blanks 6 can smoothly enter the top of the support seat 29 .

[0032] In this embodiment, three sets of telescopic rods 28 are installed at the bottom of the inner wall of the base 1. The telescopic ends of the telescopic rods 28 are fixedly mounted with support bases 29. The support bases 29 are located at the lower left of the stamping die 16. The telescopic rod 28 and the support seat 29 are used to receive the metal blank 6 cut by the cutter 5. Driven by the telescopic rod 28, the support seat 29 can drive the metal blank 6 to the feeding height, making it convenient for the stamping die 16 to push the material.

[0033] In this embodiment, a spring 27 is elastically connected between the top of the cavity mold 26 and the bottom of the support plate 30. The tension generated by the spring 27 when stretched can pull the cavity mold 26 upward and maintain the top of the cavity mold 26 at an inclination angle greater than 2° with the horizontal plane. like Figure 3 As shown, when the punching die 16 abuts against the cavity die 26, it means that the metal blank 6 has completed cold heading and is then discharged. The punching die 16 moves to the left to reset and breaks away from the abutment with the cavity die 26. The cavity die 26, which has lost the left abutment support, will rotate downward on the left side under the rotation support of the pillar 25 and stretch the spring 27. The formed bolt will then be automatically discharged under the action of the inclined component of gravity.

[0034] In this embodiment, the second spring 32 is stretched and arranged in the inner cavity of the second support tube 19. The second spring 32 generates a leftward pulling force on the fixed frame 20, and makes the fixed frame 20 always have a tendency to move leftward. The second spring 32 mainly provides a leftward pulling force for the fixed frame 20 . When the cutter 5 moves downward to perform the cutting process, the guide plate 24 as a whole moves leftward under the action of the second spring 32 .

[0035] A process for preparing a cold heading device for high-strength bolts comprises the following steps: S1. The three sets of metal blanks 6 are inserted into their corresponding transport rollers 10 and auxiliary guide wheels 8, so that the left end of the metal blank 6 passes between the cutter 5 and the adapter plate 21; S2 starts the motor 12 and drives the transport roller 10 to rotate, driving the metal blank 6 to continue to move to the left, so that the left end of the metal blank 6 abuts the rubber pad 23; S3 starts the hydraulic cylinder 3, and drives the slide 4, the cutter 5, the connecting plate 22 and the connecting rod 17 downwardly to move, the cutter 5 cuts off the left end of the metal blank 6 located on the left side of the tool holder 31; S4. The connecting plate 22 drives the abutment plate 221 to move downward to the bottom of the adapter plate 21, so that the fixing frame 20 moves to the left under the tension of the spring 32 and pulls the distance between the rubber pad 23 and the metal blank 6, and the cut metal blank 6 falls downward; S5. The connecting rod 17 moves downward and rotates, thereby driving the stamping die 16 and the support column 15 to move synchronously to the left, the stamping die 16 is out of contact with the cavity die 26, and the cavity die 26 begins to rotate downward around the axis of the support column 25 by a certain angle; S6. The cut metal blank 6 falls downward onto the support base 29, and the telescopic rod 28 is activated and drives the support base 29 to move downward, so that the metal blank 6 falls on the support base 29 and rises to a specified height; S7. Activate hydraulic cylinder 3, driving slide 4, cutter 5, connecting plate 22, and connecting rod 17 upward. Connecting rod 17 is then driven to rotate, simultaneously driving support column 15 and punch die 16 to move rightward. When the right side of punch die 16 pushes the right end of the cut metal blank 6 into the inner cavity of cavity die 26 and abuts the left side of support base 29, activate telescopic rod 28 to drive support base 29 downward and away from punch die 16. S8. The stamping die 16 moves to the right and squeezes the metal blank 6 entering the inner cavity of the die 26 to cause it to undergo plastic deformation and finally be formed. At this time, the slide 4 and the cutter 5 move upward to the highest point; S9. The connecting plate 22 drives the abutting plate 221 to move back to the position where it abuts against the adapting plate 21, and resets the fixing frame 20 to the right.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not limiting. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and all of these should be included in the scope of the claims of the present disclosure.

Claims

1. A cold heading equipment for preparing high-strength bolts, characterized in that: include: A base (1), a support plate (30) is installed on the right side of the inner wall of the base (1), a tool holder (31) is installed on the left side of the top of the support plate (30), three groups of auxiliary frames (7) and two groups of feed frames (9) are installed on the top of the support plate (30), two groups of auxiliary guide wheels (8) are rotatably installed inside the auxiliary frames (7), two groups of transport rollers (10) are rotatably installed inside the feed frames (9), three groups of adapting grooves (13) are opened on the outer surface of the transport rollers (10), and a metal blank (6) is clamped between the transport rollers (10) and the auxiliary guide wheels (8); A bracket (2) is mounted on the top of the base (1), a hydraulic cylinder (3) is mounted on the top of the bracket (2), a slide (4) is mounted on the telescopic end of the hydraulic cylinder (3), a cutter (5) is mounted on the right side of the bottom of the slide (4), a connecting plate (22) is fixedly connected to the left side of the bottom of the slide (4), a support cylinder 1 (14) and a support column 2 (18) are fixedly mounted on the left side of the inner wall of the base (1), a support cylinder 2 (19) is slidably mounted on the outer surface of the support column 2 (18), a fixed frame (20) is fixedly mounted on the right end of the support cylinder 2 (19), and an adapter plate (21) is fixedly mounted on the inner wall of the fixed frame (20); A support column (15) is slidably mounted inside the support cylinder (14), a stamping die (16) is fixedly mounted on the right end of the support column (15), a connecting rod (17) is hinged between the slide plate (4) and the stamping die (16), a support column (25) is fixedly mounted inside the base (1), and a cavity die (26) is movably mounted on the outer surface of the support column (25).

2. A cold heading equipment for preparing high-strength bolts according to claim 1, characterized in that: The two groups of feeding racks (9) are respectively located on the left and right sides of the auxiliary rack (7), and the three groups of auxiliary racks (7) are equidistantly distributed front and back. The front ends of the transport rollers (10) on the left are fixedly mounted with mutually meshing gears (11). A motor (12) is mounted on the back of the feeding rack (9) on the left, and the output shaft of the motor (12) is fixedly connected to the transport roller (10) on the upper side.

3. A cold heading equipment for preparing high-strength bolts according to claim 2, characterized in that: The inner movably sleeve of the second support cylinder (19) is provided with a second spring (32), and the two ends of the second spring (32) are elastically connected to the fixed frame (20) and the second support column (18) respectively.

4. A cold heading equipment for preparing high-strength bolts according to claim 3, characterized in that: The bottom of the connecting plate (22) is adapted to be snap-connected to the inner wall of the fixed frame (20); an abutting plate (221) is provided on the right side of the bottom of the connecting plate (22); an adaptor plate (21) is fixedly mounted on the upper portion of the right side of the inner wall of the fixed frame (20); the abutting plate (221) is adapted to abut against the adaptor plate (21); and the top of the abutting plate (221) and the bottom of the adaptor plate (21) are both provided with inclined surfaces adapted to abut against each other.

5. The cold heading equipment for preparing high-strength bolts according to claim 4, characterized in that: A rubber pad (23) is glued to the right side of the fixing frame (20), and the left end of the metal blank (6) abuts against the rubber pad (23).

6. A cold heading equipment for preparing high-strength bolts according to claim 5, characterized in that: Three groups of guide plates (24) are fixedly mounted on the bottom of the right side of the fixed frame (20), and each group of guide plates (24) corresponds to a group of metal blanks (6).

7. A cold heading equipment for preparing high-strength bolts according to claim 6, characterized in that: Three groups of telescopic rods (28) are installed at the bottom of the inner wall of the base (1), and a support seat (29) is fixedly installed at the telescopic end of the telescopic rod (28), and the support seat (29) is located at the lower left of the stamping die (16).

8. The cold heading equipment for preparing high-strength bolts according to claim 7, characterized in that: A spring 1 (27) is elastically connected between the top of the cavity mold (26) and the bottom of the support plate (30). The tension generated by the spring 1 (27) when stretched can pull the cavity mold (26) upward and keep the top of the cavity mold (26) at a rotation angle greater than 2° with the horizontal plane.

9. The cold heading equipment for preparing high-strength bolts according to claim 8, characterized in that: The second spring (32) is stretched and arranged in the inner cavity of the second support tube (19). The second spring (32) generates a leftward pulling force on the fixed frame (20), and makes the fixed frame (20) always have a tendency to move leftward.

10. A cold heading process for preparing high-strength bolts, using the cold heading equipment for preparing high-strength bolts according to claim 9, characterized in that: The following steps are also included: S1. Insert three groups of metal blanks (6) into their respective corresponding transport rollers (10) and auxiliary guide wheels (8), so that the left end of the metal blank (6) passes between the cutter (5) and the adapter plate (21); S2. Start the motor (12) and drive the transport roller (10) to rotate, driving the metal blank (6) to continuously move to the left, so that the left end of the metal blank (6) abuts against the rubber pad (23); S3. Start the hydraulic cylinder (3) and drive the slide (4), the cutter (5), the connecting plate (22) and the connecting rod (17) downwardly, and the cutter (5) cuts off the left end of the metal blank (6) located on the left side of the tool holder (31); S4. The connecting plate (22) drives the abutting plate (221) to move downward to the bottom of the adapter plate (21), so that the fixing frame (20) moves to the left under the tension of the second spring (32), and the distance between the rubber pad (23) and the metal blank (6) is pulled apart, and the cut metal blank (6) falls downward; S5. The connecting rod (17) moves downward and rotates, thereby driving the stamping die (16) and the support column (15) to move synchronously to the left, the stamping die (16) is separated from the contact with the cavity die (26), and the cavity die (26) begins to rotate downward around the axis of the support column (25) by a certain angle; S6. The cut metal blank (6) falls downward onto the support seat (29), the telescopic rod (28) is activated and drives the support seat (29) to move downward, so that the metal blank (6) falling on the support seat (29) rises to a specified height; S7. Start the hydraulic cylinder (3) and drive the slide plate (4), the cutter (5), the connecting plate (22) and the connecting rod (17) to move upward, the connecting rod (17) is driven to rotate, and at the same time drive the support column (15) and the punching die (16) to move to the right. When the right side of the punching die (16) pushes the right end of the cut metal blank (6) into the inner cavity of the cavity die (26) and abuts against the left side of the support seat (29), start the telescopic rod (28) to drive the support seat (29) to move downward and avoid the punching die (16); S8. The stamping die (16) moves to the right and squeezes the metal blank (6) entering the inner cavity of the cavity die (26) to cause it to undergo plastic deformation and finally be formed. At this time, the slide (4) and the cutter (5) move upward to the highest point; S9. The connecting plate (22) drives the abutting plate (221) to move again to a position where it abuts the adapting plate (21), and resets the fixing frame (20) to the right.

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