A thread rolling device for double-ended stud and a processing method for double-ended stud

Abstract

The present invention relates to the field of double-ended studs, and specifically to a thread rolling device for double-ended studs and a processing method for double-ended studs, comprising two thread rolling plates; the two thread rolling plates are relatively spaced apart; each of the thread rolling plates comprises a thread plate body; an avoidance groove is provided on the thread plate body; two thread rolling areas are provided on the thread plate body; the two thread rolling areas are spaced apart and parallel and staggered; and are located on both sides of the avoidance groove; the two thread rolling areas on each thread rolling plate have different sizes; the thread rolling device disclosed in the present invention has two thread rolling areas on each thread rolling plate, and the sizes of the corresponding areas of the thread rolling areas are different, so that in subsequent use, the two threads at both ends of the double-ended stud can be realized through a one-time thread forming process, which can save processing and turnover time, improve production efficiency and capacity, and save costs.

Description

Technical Field

[0001] The invention relates to the field of stud bolts, in particular to a thread rolling device for stud bolts and a processing method for stud bolts. Background Art

[0002] At present, the external thread processing on fasteners mostly adopts extrusion molding, that is, thread rolling and thread rolling. The processing principle mainly adopts cold extrusion molding. Cold extrusion molding has the advantages of high production efficiency, low processing cost, high precision and strength of processed threads, and good surface quality, and has been widely used.

[0003] A stud is a common fastener with threads on both ends.

[0004] Traditionally, the thread processing of double-ended studs needs to be divided into two separate molding processes, especially when the pitches of the threads at both ends are not consistent, one end needs to be processed first, and then the other end.

[0005] This processing method is prone to omissions, incorrect processing, etc., resulting in one end of some studs not having threads processed or incorrect processing, and the coaxiality of the threads at both ends is poor, affecting product quality and production efficiency.

[0006] The existing patent 202220822719.3 - A one-time thread rolling forming device for a stud bolt with a washer can realize the thread rolling operation of the stud; however, it has limitations. It can only process studs with the same thread section specifications at both ends of the stud, and is not applicable to studs with different thread specifications at both ends.

[0007] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing thread rolling structure. Summary of the invention

[0008] The purpose of the invention is to provide a thread rolling device which can realize the thread rolling operation of a double-ended stud with different thread specifications at both ends.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A thread rolling device for a double-ended stud, comprising two thread rolling plates; the two thread rolling plates are relatively spaced and distributed;

[0011] Each of the thread rolling plates comprises a thread rolling plate body; an avoidance groove is provided on the thread rolling plate body;

[0012] The thread plate body is provided with two thread rolling areas; the two thread rolling areas are spaced apart, parallel and staggered; and are located on both sides of the avoidance groove;

[0013] The two thread rolling areas on each thread rolling plate are of different sizes.

[0014] The horizontal projections of the two thread rolling areas on each thread rolling plate partially overlap.

[0015] Each thread rolling area includes a shaping area and a forming area; the shaping area is connected to the forming area, and the shaping area and the forming area are distributed on the thread plate body in sequence; when in use, the shaping area first contacts the forming area and the stud to be threaded.

[0016] Each of the thread rolling areas further comprises a feeding area and a discharging area; the feeding area, shaping area, forming area and discharging area in each thread rolling area are arranged in sequence and connected in sequence;

[0017] The feeding area is used for guiding the feeding of the studs to be threaded;

[0018] The shaping area is used for squeezing and shaping the stud to be threaded;

[0019] The forming area is used to form corresponding thread segments on the shaped stud bolt;

[0020] The discharging area is used for the stud bolts which have been threaded once to be separated from the corresponding threading area.

[0021] The discharge area in one of the two thread rolling areas overlaps with the horizontal projection of the input area in the other thread rolling area.

[0022] A double-headed stud processing method, the processing method comprising the following steps:

[0023] Step 1: Material modification: modifying the raw material to meet the requirements of stud processing to form a blank;

[0024] Step 2: Main body forming: The main body of the stud is formed by setting the processing technology to form a semi-finished stud;

[0025] Step 3: rolling the thread; forming a thread section on the semi-finished stud; forming a thread section on the semi-finished stud by using a thread rolling device for the stud;

[0026] Step 4: Appearance selection;

[0027] Step 5: Pack the studs selected in step 4 and put them into storage.

[0028] The processing technology in step 2 includes the following steps:

[0029] S1: cold heading;

[0030] S2: degreasing;

[0031] S3: pull rod, plane chamfering;

[0032] S4: dephosphorization and heat treatment;

[0033] S5: grinding blank diameter;

[0034] S6: Straightening.

[0035] During the straightening in S6, the straightening structure is used to perform a straightening operation on the semi-finished stud bolt after being formed.

[0036] The straightening structure comprises two straightening plates arranged opposite to each other, and the two straightening plates are spaced apart from each other;

[0037] Each of the straightening plates comprises a straightening body; a middle groove is provided on the straightening body;

[0038] The inner side surface of the straightening body is a smooth plane.

[0039] In step 3, when a thread section is formed on a semi-finished stud using a thread rolling device for the stud, it is required to firstly perform a thread rolling operation on the end of the stud with a larger nominal diameter.

[0040] The advantages of the present invention are:

[0041] The invention discloses a thread rolling device for a stud and a method for processing the stud.

[0042] The thread rolling device for a stud bolt disclosed in the present invention can realize the thread rolling and forming of threads at both ends of the stud bolt through the coordinated use of two thread rolling plates.

[0043] In addition, because the thread rolling device disclosed in the present invention is provided with two thread rolling areas on each thread rolling plate, and the sizes of the corresponding areas of the thread rolling areas are different, in the subsequent use, the two kinds of threads at both ends of the double-headed stud can be realized through a one-time thread forming process, which can save processing and turnover time, improve production efficiency and capacity, and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0045] Figure 1 It is a schematic diagram of the structure of the present invention.

[0046] The marks in the above figure are:

[0047] 1. Thread rolling plate, 2. Thread rolling area, 3. Avoidance groove, 4. Thread plate body, 5. Feeding area, 6. Shaping area, 7. Forming area, 8. Discharging area. DETAILED DESCRIPTION

[0048] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0049] A thread rolling device for a double-ended stud comprises two thread rolling plates 1; the two thread rolling plates 1 are relatively spaced apart; each of the thread rolling plates 1 comprises a thread plate body 4; an avoidance groove 3 is provided on the thread plate body 4; two thread rolling areas 2 are provided on the thread plate body 4; the two thread rolling areas 2 are spaced apart and parallel to each other and are located on both sides of the avoidance groove 3; the two thread rolling areas 2 on each thread rolling plate 1 are of different sizes; the thread rolling device for a double-ended stud disclosed in the present invention can realize the thread rolling forming of threads at both ends of the double-ended stud through the coordinated use of the two thread rolling plates 1.

[0050] In addition, because the thread rolling device disclosed in the present invention is provided with two thread rolling areas 2 on each thread rolling plate 1, and the sizes of the corresponding areas of the thread rolling areas 2 are different, in the subsequent use, the two kinds of threads at both ends of the double-headed stud can be realized through a one-time thread forming process, which can save processing and turnover time, improve production efficiency and capacity, and save costs.

[0051] Specifically, the thread rolling device for the double-headed stud disclosed in the present invention mainly includes two thread rolling plates 1; in the present invention, one thread rolling plate 1 is a fixed thread rolling plate 1, that is, a static thread rolling plate 1, and the other thread rolling plate 1 is a movable thread rolling plate 1, that is, a dynamic thread rolling plate 1. The movable thread rolling plate 1 and the fixed thread rolling plate 1 can move relative to each other, and the subsequent thread rolling operation is realized through the relative movement of the two.

[0052] Meanwhile, in the present invention, the two thread rolling plates 1 are relatively spaced apart; the specific spacing size can be selected as required.

[0053] In addition, in the present invention, each of the thread rolling plates 1 includes a thread rolling plate body 4; the thread rolling plate body 4 is the main structure of the thread rolling plate 1, and an avoidance groove 3 is provided on the thread rolling plate body 4; the setting of the avoidance groove 3 plays a good avoidance role, which is convenient for avoiding the gasket or flange in the middle area of ​​the stud, avoiding interference between the stud and the thread rolling plate 1 in operation.

[0054] At the same time, in the present invention, two thread rolling areas 2 are provided on the wire plate body 4; the two thread rolling areas 2 are distributed in parallel and staggered manner at intervals; and are located on both sides of the avoidance groove 3; in the present invention, a thread rolling area 2 is provided at the upper right corner and the lower left corner of the wire plate body 4 respectively; the upper left corner and the lower right corner of the wire plate body 4 are smooth planes. Based on this design, the two thread rolling areas 2 and the two smooth planes are distributed in a cross shape, forming two thread rolling positions and two idle positions; for the convenience of subsequent use, the two thread rolling positions can be used for thread rolling and forming of the threaded sections at both ends of the double-headed stud; the idle position plays a good transition role.

[0055] In the present invention, the above two smooth planes can also be used to straighten the studs, so that the studs can be straightened while being threaded; the coaxiality of the studs at both ends is ensured. Based on this design, a separate straightening process does not need to be set during actual processing and production.

[0056] At the same time, in the present invention, the two thread rolling areas 2 on each thread rolling plate 1 have different sizes; based on this design, the thread rolling operation at both ends of the double-headed stud can be realized, and the thread rolling processing of threads of different specifications can also be realized; specifically, the specific sizes of the two thread rolling areas 2 can be designed according to needs.

[0057] Furthermore, in the present invention, the horizontal projections of the two thread rolling areas 2 on each thread rolling plate 1 partially overlap; in actual arrangement, the thread rolling plates 1 of the present invention are arranged along the longitudinal direction; the thread rolling areas 2 are distributed on the sides of the thread rolling plates 1, and in the present invention, although each thread rolling plate 1 is required to be distributed at intervals in the longitudinal space, from a top view, the two thread rolling areas 2 on each thread rolling plate 1 partially overlap, and such an arrangement can achieve a smooth transition of the stud in the two thread rolling areas 2.

[0058] In addition, based on the above design, the present invention can ensure the continuity of thread rolling during the thread rolling process at both ends of the stud. After the stud passes through the first thread rolling zone 2, the above overlapping part can help the stud to smoothly transition to the second thread rolling zone 2, thereby realizing continuous thread rolling operation at both ends of the stud.

[0059] Furthermore, in the present invention, each of the thread rolling areas 2 includes a shaping area 6 and a forming area 7; the shaping area 6 is connected to the forming area 7, and the shaping area 6 and the forming area 7 are distributed in sequence on the wire plate body 4; when in use, the shaping area 6 first contacts the forming area 7 with the stud to be thread rolled; based on this design, the stud can be shaped first and then formed.

[0060] In the present invention, based on the above design, the shaping and preforming of the stud can be achieved: the main function of the shaping zone 6 is to perform preliminary shaping and preforming treatment on the stud.

[0061] During the thread rolling process, the shaping zone 6 first contacts the stud to extrude and shape the material so that its shape is closer to the shape of the final thread.

[0062] Ensure thread quality: The shaping zone 6 can reduce uneven deformation of the material by pre-shaping the stud, thereby ensuring that the subsequent forming zone 7 can form high-quality threads.

[0063] Reducing material waste: Through the pre-shaping effect of the shaping zone 6, the waste of material in the thread rolling process can be reduced.

[0064] The shaping zone 6 can ensure that the material is in a suitable shape before entering the forming zone 7, thereby reducing material waste due to inappropriate shape.

[0065] Improve production efficiency: The existence of the shaping zone 6 makes the thread rolling process smoother, reduces processing interruptions caused by inappropriate material shape, and thus improves production efficiency.

[0066] Improvement of thread forming effect: The continuous design of shaping zone 6 and forming zone 7 helps to improve the thread forming effect; after the shaping zone 6 performs preliminary shaping on the material, the forming zone 7 can further accurately shape it on this basis to form a thread that meets the specification requirements.

[0067] Reducing tool wear: The pre-shaping effect of the shaping zone 6 can reduce the wear of the forming zone 7, because the material has been preliminarily shaped before entering the forming zone 7, reducing the additional wear of the forming zone 7 caused by the irregular shape of the material.

[0068] Furthermore, in the present invention, each of the thread rolling areas 2 also includes a feed area 5 and a discharge area 8; the feed area 5, shaping area 6, forming area 7 and discharge area 8 in each thread rolling area 2 are arranged in sequence and connected in sequence; the feed area 5 is used for guiding the feed of the double-headed stud to be threaded; the shaping area 6 is used for squeezing and shaping the double-headed stud to be threaded; the forming area 7 is used to form a corresponding thread segment on the double-headed stud after shaping; the discharge area 8 is used to separate the double-headed stud that has been threaded once from the corresponding thread rolling area 2.

[0069] In the present invention, the feeding area 5 has the following functions: the feeding area 5 mainly guides the studs to be threaded into the thread rolling plate 1 .

[0070] It ensures that the bolt is correctly aligned and can enter the subsequent shaping area smoothly6.

[0071] The design of the feed zone 5 usually includes guide grooves or guide surfaces to ensure the centering and smooth entry of the bolts.

[0072] Function of shaping zone 6: Shaping zone 6 is used to squeeze and shape the stud to make its shape closer to the final thread shape.

[0073] This step helps to pre-form the bolt, reduce uneven deformation of the material, and prepare for thread forming in the forming area 7.

[0074] Function of forming zone 7: forming zone 7 is the most critical part in the thread rolling process, which is used to form the corresponding thread segment on the stud after shaping.

[0075] The design of the thread rolling plate 1 in the forming area 7 must be accurate to ensure that the formed threads meet the specification requirements and have the correct pitch, tooth shape and size.

[0076] Function of the discharging area 8: the discharging area 8 is used to enable the stud bolts which have been threaded once to be smoothly separated from the corresponding threading area 2.

[0077] It ensures that the stud can be smoothly moved out of the thread rolling plate 1 after the thread rolling is completed, making room for the processing of the next stud.

[0078] The above design enables the thread rolling process to be carried out continuously, and each area has a clear function, ensuring the efficiency and precision of the thread rolling process.

[0079] The stud bolt enters from the feeding area 5, is processed in the shaping area 6 and the forming area 7, and finally exits from the discharging area 8, completing the entire thread rolling process; such a design not only improves production efficiency, but also helps to ensure the quality and consistency of the thread.

[0080] In addition, in the present invention, in order to facilitate the feeding of materials, the feeding area 5 and the shaping area 6 are often engraved with anti-skid teeth to increase the friction force and prevent the stud from slipping under the pressure.

[0081] The design of the feeding area 5 helps to ensure that the material enters the processing area smoothly and is ready for subsequent forming.

[0082] Shaping zone 6: After the stud bolt passes through the feeding zone 5, the function of the shaping zone 6 is to squeeze and shape the stud bolt to ensure that its shape meets the requirements before entering the forming zone 7.

[0083] The provision of the shaping area 6 helps to adjust and correct the shape of the stud to make it more regular, thus providing a basis for forming precise threads.

[0084] Forming area 7: After passing through the feeding area 5 and the shaping area 6, the stud enters the forming area 7.

[0085] In the forming area 7, the stud is extruded into a screw according to the design features of the groove, tooth edge, tip and tail angle on the straightening plate.

[0086] The forming area 7 is the most critical area in the thread rolling process, which directly affects the shape and accuracy of the final thread.

[0087] Discharging area 8: This is the part where the studs are discharged after being formed.

[0088] The design of the discharge area 8 is to ensure that the formed stud bolt can be smoothly separated from the thread rolling plate 1 while avoiding damage to the finished thread.

[0089] Furthermore, in the present invention, the discharge area 8 in one of the two thread rolling areas 2 coincides with the horizontal projection of the feed area 5 in the other thread rolling area 2; this design has the following functions and advantages. First, it can realize continuous processing of the double-headed stud: this design allows the double-headed stud to directly enter the next thread rolling area 2 for thread processing at the other end after completing the thread processing in one thread rolling area 2 without additional positioning or adjustment.

[0090] This ensures the continuity and smoothness of the processing.

[0091] The above operation can improve the production efficiency of the double-ended studs. Since the double-ended studs directly enter the feeding area 5 of the next thread rolling area 2 from the discharge area 8 of one thread rolling area 2, the pause and repositioning time in the processing process are reduced, thereby improving the overall production efficiency; reducing the complexity of operation. The overlapping design simplifies the transfer process of the double-ended studs between the two thread rolling areas 2, reduces the complexity of operation, and reduces the work intensity of the operators; saving space. By overlapping the horizontal projections, the processing of the threads at both ends of the double-ended studs can be achieved in a limited space, saving the equipment footprint; improving precision: since the transfer of the bolts between the two thread rolling areas 2 is continuous, this can reduce the errors caused by repositioning and improve the precision of thread processing.

[0092] A double-headed stud processing method, the processing method comprising the following steps:

[0093] Step 1: Material modification: modify the raw materials to meet the requirements of stud processing to form a blank; specifically, modify the metallographic structure, grain size, strength and size to meet the requirements of cold extrusion molding of studs;

[0094] Step 2: Main body forming: The main body of the stud is formed by setting the processing technology to form a semi-finished stud;

[0095] Step 3: rolling the thread; forming a thread section on the semi-finished stud; forming a thread section on the semi-finished stud by using a thread rolling device for the stud;

[0096] Step 4: Appearance selection;

[0097] Step 5: Pack the studs selected in step 4 and put them into storage.

[0098] Based on the above design, the present invention facilitates the processing and production of stud bolts.

[0099] Furthermore, the processing technology in step 2 of the present invention includes the following steps:

[0100] S1: cold heading;

[0101] S2: degreasing;

[0102] S3: pull rod, plane chamfering;

[0103] S4: dephosphorization and heat treatment;

[0104] S5: grinding blank diameter;

[0105] S6: Straightening.

[0106] Based on the above processing technology, the present invention facilitates the processing and production of semi-finished studs. Specific embodiment 1:

[0108] Step 1: Material modification: modifying the raw material to meet the requirements of stud processing to form a blank;

[0109] Step 2: Main body forming: The main body of the stud is formed by setting the processing technology to form a semi-finished stud;

[0110] Step 3: Degreasing: Remove the residual oil on the surface of the product during forming

[0111] Step 4: rolling the thread; forming a thread section on the semi-finished stud; forming a thread section on the semi-finished stud by the stud thread rolling device according to any one of claims 1 to 5;

[0112] Step 5: Dephosphorization and heat treatment; dephosphorization is to remove the residual phosphate film on the surface of the product, and heat treatment is performed to obtain the required metallographic structure and improve the comprehensive mechanical properties of the product;

[0113] Step 6: Surface treatment; obtaining the required surface protective layer;

[0114] Step 7: Appearance selection;

[0115] Step 8: Pack the studs selected in step 7 and store them in warehouse.

[0116] In the present invention, 1. Material modification: Function: modifying the raw materials to meet the requirements for stud processing to form blanks; specifically, modifying the metallographic structure, grain size, strength and size to meet the requirements for cold extrusion molding of studs; preparing for the subsequent cold heading process;

[0117] 2. Cold heading: Function: Pressure processing of metal materials through a die at room temperature to form the basic shapes of the head and rod of the stud;

[0118] 3. Degreasing: Function: Remove grease and dirt from the surface of the studs to provide a clean surface for subsequent processing and surface treatment;

[0119] 4. Rod pulling and plane chamfering: Function: Rod pulling is to further process the semi-finished parts after cold heading to make their size and shape more accurate; plane chamfering is to chamfer the end face of the semi-finished parts to facilitate subsequent processing and assembly;

[0120] 5. Dephosphorization and heat treatment: Function: Dephosphorization is to remove the oxide scale and impurities on the surface of the material to improve the surface quality;

[0121] Heat treatment improves the hardness, strength and wear resistance of materials by changing their internal structure.

[0122] 6. Grinding diameter: Function: Precision grinding the diameter of the stud to ensure dimensional accuracy and surface finish;

[0123] 7. Straightening: Function: Correct the bending or twisting that may occur in the semi-finished studs during the previous processing to ensure straightness, which is very important for the assembly and load-bearing capacity of the studs;

[0124] 8. Thread rolling function: processing threads on semi-finished studs;

[0125] 9. Surface treatment, generally zinc-nickel alloy plating, dull black: Function: zinc-nickel alloy plating is an electroplating process used to improve the corrosion resistance of studs; dull black treatment is a surface treatment used to improve the wear resistance and aesthetics of studs;

[0126] 10. Appearance selection: Function: Check the appearance of the studs, remove defective products, and ensure that only studs that meet quality standards enter the market;

[0127] 11. Packaging and warehousing: Function: Pack the qualified studs for easy transportation and storage, and then store them in warehouse waiting for shipment.

[0128] Furthermore, during the straightening in S6 of the present invention, a straightening structure is used to perform a straightening operation on the semi-finished stud after forming; based on this design, it is convenient to perform a thread rolling operation on the semi-finished stud using a thread rolling device.

[0129] Furthermore, the straightening structure in the present invention includes two straightening plates arranged relatively to each other, and the two straightening plates are relatively spaced apart from each other; each of the straightening plates includes a straightening body; a middle groove is provided on the straightening body; the inner side surface of the straightening body is a smooth plane; in the present invention, the two straightening plates are relatively spaced apart and parallel to each other, and the middle groove plays a good avoidance role. At the same time, a smooth plane is provided on the inner side surface of the straightening body, and the smooth plane is a precise plane; based on this design, the straightening operation of the stud is achieved by relative extrusion of the two straightening plates.

[0130] The main structure of the straightening structure in the present invention is similar to the thread rolling device disclosed in the present invention in terms of overall structure, the difference being that the thread rolling plate 1 in the thread rolling device has a thread rolling area 2, while the straightening plate is not provided with a thread rolling area 2.

[0131] Furthermore, in step 3 described in the present invention, when a thread segment is formed on the stud using a thread rolling device for the stud, it is required to first perform a thread rolling operation on the end with a larger nominal diameter on the stud; in the present invention, the thread rolling operation is first performed on the end with a larger nominal diameter on the stud in order to ensure processing accuracy and stability, control material deformation, and improve production efficiency.

[0132] In the present invention, a larger nominal diameter means a larger pitch of the thread, and machining the large diameter end first can ensure a more accurate starting position of the thread, thereby improving the machining accuracy of the entire stud.

[0133] Larger thread ends usually require greater pressure from the thread rolling plate 1 to form threads. Processing the large diameter end first can ensure the stability of the stud during the thread rolling process and avoid thread tilting or scrapping due to uneven pressure.

[0134] Material deformation control: During the thread rolling process, the material will deform to a certain extent. Processing the large diameter end first can better control the material deformation, because after the large diameter end thread is formed, the processing of the small diameter end can use the formed large diameter thread as a reference, reducing the problems caused by material deformation.

[0135] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A thread rolling device for a stud, characterized in that: It includes two thread rolling plates; the two thread rolling plates are arranged at a relative interval; Each of the thread rolling plates comprises a thread rolling plate body; an avoidance groove is provided on the thread rolling plate body; The thread plate body is provided with two thread rolling areas; the two thread rolling areas are spaced apart and parallel and staggered; and are located on both sides of the avoidance groove; The two thread rolling areas on each thread rolling plate are of different sizes.

2. A thread rolling device for a stud according to claim 1, characterized in that: The horizontal projections of the two thread rolling areas on each thread rolling plate partially overlap.

3. A thread rolling device for a stud according to any one of claims 1 to 2, characterized in that: Each thread rolling area includes a shaping area and a forming area; the shaping area is connected to the forming area, and the shaping area and the forming area are distributed on the thread plate body in sequence; when in use, the shaping area first contacts the forming area and the stud to be threaded.

4. A thread rolling device for a stud according to claim 3, characterized in that: Each of the thread rolling areas further comprises a feeding area and a discharging area; the feeding area, shaping area, forming area and discharging area in each thread rolling area are arranged in sequence and connected in sequence; The feeding area is used for guiding the feeding of the studs to be threaded; The shaping area is used for squeezing and shaping the stud to be threaded; The forming area is used to form corresponding thread segments on the shaped stud bolt; The discharging area is used for the stud bolts which have been threaded once to be separated from the corresponding threading area.

5. A thread rolling device for a stud according to claim 4, characterized in that: The discharge area in one of the two thread rolling areas overlaps with the horizontal projection of the input area in the other thread rolling area.

6. A method for processing a double-ended stud, characterized in that: The processing method comprises the following steps: Step 1: Material modification: modifying the raw material to meet the requirements of stud processing to form a blank; Step 2: Main body forming: The main body of the stud is formed by setting the processing technology to form a semi-finished stud; Step 3: rolling the thread; forming a thread section on the semi-finished stud; forming a thread section on the semi-finished stud by the stud thread rolling device according to any one of claims 1 to 5; Step 4: Appearance selection; Step 5: Pack the studs selected in step 4 and put them into storage.

7. A method for processing a double-ended stud according to claim 6, characterized in that: The processing technology in step 2 includes the following steps: S1: cold heading; S2: degreasing; S3: pull rod, plane chamfering; S4: dephosphorization and heat treatment; S5: grinding blank diameter; S6: Straightening.

8. A method for processing a double-ended stud according to claim 7, characterized in that: During the straightening in S6, the straightening structure is used to perform a straightening operation on the semi-finished stud bolt after being formed.

9. A method for processing a double-ended stud according to claim 8, characterized in that: The straightening structure comprises two straightening plates arranged opposite to each other, and the two straightening plates are spaced apart from each other; Each of the straightening plates comprises a straightening body; a middle groove is provided on the straightening body; The inner side surface of the straightening body is a smooth plane.

10. A method for processing a double-ended stud according to claim 1, characterized in that: In step 3, when a thread section is formed on a semi-finished stud using a thread rolling device for the stud, it is required to firstly perform a thread rolling operation on the end of the stud with a larger nominal diameter.

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