A kind of extruded combined copper nut and processing method thereof

Abstract

The present invention relates to the technical field of extrusion molding, and specifically to an extrusion-molded combined copper nut and a processing method thereof, wherein an extrusion-molded combined copper nut processing method specifically includes the following steps: S1: nut outer pipe processing, S2: nut inner pipe processing, S3: extrusion molding, S4: processing of the outer surface and the inner thread of the nut. The present invention can quickly form a nut outer pipe and a threaded inner pipe respectively through stamping molding and casting molding, and can quickly complete the locking work between the nut outer pipe and the threaded inner pipe by extrusion molding. By adopting this method, not only the problem of low molding efficiency is solved, but also the generation of waste can be effectively reduced, which plays a role in reducing costs.

Description

Technical Field

[0001] The invention relates to the technical field of extrusion molding, and in particular to an extrusion-molded combined copper nut and a processing method thereof. Background Art

[0002] Nowadays, the three-way clamp and other components of the Christmas tree water injection wellhead need to use a nut structure during installation. The existing nut structure is often made by turning and milling. This method has a relatively low processing efficiency and will cause a great waste of materials during the turning and milling process. In addition, since the installation environment of the nut structure of the Christmas tree water injection wellhead is often relatively harsh, the nut structure is prone to get stuck after a certain period of time after use. When maintenance is required, the stuck nut structure will cause great trouble. Therefore, copper nuts are used in actual construction and installation. The softer characteristics of copper nuts can make them quickly disassembled and assembled when stuck. However, the use of all-copper nuts will undoubtedly greatly increase the cost. Therefore, in order to reduce the cost, it is particularly important to design an extruded combined copper nut and a processing method thereof. Summary of the invention

[0003] In order to solve the above problems, the present invention designs an extruded combined copper nut and a processing method thereof. The nut outer pipe fitting and the threaded inner pipe fitting can be quickly made through stamping and casting respectively, and the locking work between the nut outer pipe fitting and the threaded inner pipe fitting can be quickly completed through extrusion molding. By adopting this method, the processing efficiency is greatly improved, and the generation of waste can be greatly reduced, which plays a role in reducing costs.

[0004] In order to solve the above technical problems, the present invention provides an extruded combined copper nut processing method, which specifically comprises the following steps:

[0005] S1: Processing of nut outer pipe fittings: Processing the nut outer pipe fittings by stamping and processing an internal thread for installing the nut inner pipe fittings at one end of the nut outer pipe fittings;

[0006] S2: Processing of the inner pipe fitting of the nut: directly process the inner pipe fitting of the nut by casting, and then process the outer thread of the inner pipe fitting of the nut for connecting the outer pipe fitting of the nut;

[0007] S3: extrusion molding: screwing the inner tube of the nut processed in step S2 into the outer tube of the nut, and then sending the connection part of the inner tube of the nut and the outer tube of the nut into an extrusion molding machine, and locking the inner tube of the nut in the outer tube of the nut by extrusion molding;

[0008] S4: Processing of the outer surface and the inner thread of the nut: After the processing in step S3 is completed, the inner thread of the nut is firstly processed at the inner hole of the inner pipe of the nut, and then the outer surface of the outer pipe of the nut is finely processed.

[0009] Further: the specific steps of step S1: nut outer pipe processing are as follows:

[0010] A1: Process the iron or stainless steel bars into the required length through the cutting device;

[0011] A2: The rod processed in step A1 is then sent to an induction heating device for heating;

[0012] A3: Then the heated bar is sent into the stamping machine, and the nut outer pipe fittings are processed by bidirectional stamping;

[0013] A4: After the nut outer pipe fitting processed in step S3 is cooled, an internal thread for installing the nut inner pipe fitting is processed in one end of the nut outer pipe fitting by a machine tool.

[0014] Furthermore: the cutting device includes a base plate, an upper support plate, a guide roller assembly, a left clamping assembly, a right clamping assembly, an electric cutting tool, a mounting seat and a lifting cylinder. The upper support plate is fixed to the top of the base plate through a column. There are several guide roller assemblies, and the guide roller assemblies are arranged between the upper support plate and the base plate from left to right. The left clamping assembly is composed of an upper left clamping seat, a lower left clamping seat and a first clamping electric cylinder. The lower left clamping seat is fixed to the base plate. The upper left clamping seat is located directly above the lower left clamping seat and is connected to the first clamping electric cylinder installed on the upper support plate. The upper left clamping seat is clamped by the first clamping electric cylinder The driving cover is closed on the lower left clamping seat, and the right clamping assembly is composed of the upper right clamping seat, the lower right clamping seat and the second clamping electric cylinder. The lower right clamping seat is fixed to the bottom plate on the right side of the lower left clamping seat, and the upper right clamping seat is located directly above the lower right clamping seat and is connected to the second clamping electric cylinder installed on the upper support plate. The upper right clamping seat is closed on the lower right clamping seat through the driving cover of the second clamping electric cylinder. A lifting electric cylinder is installed on the upper support plate, and the output shaft end of the lifting electric cylinder passes through the upper support plate and is connected to the mounting seat. The electric cutting tool is connected to the mounting seat, and the electric cutting tool cuts the rods between the left clamping assembly and the right clamping assembly with the cooperation of the lifting electric cylinder.

[0015] Furthermore: a notch is provided on the top of the upper left clamping seat, an adjusting electric cylinder is installed on the top of the upper left clamping seat, the shaft end of the adjusting electric cylinder is connected to the baffle, and the lower end of the baffle extends into the upper left clamping seat from the notch.

[0016] Further: the stamping forming machine includes an outer cylinder, an inner rotating cylinder, a support base, a stamping lower mold, a stamping upper mold, a mold closing electric cylinder, a left support base, a right support base, a first stamping electric cylinder, a second stamping electric cylinder, a first punching head and a second punching head, the outer cylinder is supported by a support base arranged at the bottom, the inner rotating cylinder is driven to rotate and connected in the outer cylinder by a rotary drive mechanism, the stamping lower mold is fixed to the inner wall of one end of the inner rotating cylinder by a first supporting connector, the stamping upper mold is opposite to the stamping lower mold and is connected to the mold closing electric cylinder, and the mold closing electric cylinder is connected to the mold closing electric cylinder by a first supporting connector. Two supporting connecting parts are fixed on the inner wall of the other end of the inner rotating cylinder, the left supporting seat is arranged on the outer wall of the left end of the outer cylinder and is connected to it as a whole, the first stamping electric cylinder is installed on the left supporting seat and is connected to the first stamping head, and a first stamping hole matching the first stamping head is opened on the stamping lower mold relative to the position of the first stamping head, the right supporting seat is arranged on the outer wall of the right end of the outer cylinder and is connected to it as a whole, the second stamping electric cylinder is installed on the right supporting seat and is connected to the second stamping head, and a second stamping hole matching the second stamping head is opened on the stamping upper mold relative to the position of the second stamping head.

[0017] Furthermore: the rotary drive mechanism includes a mounting frame, a driving gear, a rotary drive servo motor and an outer gear ring, the mounting frame is arranged on the top of the outer cylinder and is integrally connected thereto, the rotary drive servo motor is fixed on the mounting frame and is connected to the driving gear, a through groove for the driving gear to extend into the top of the outer cylinder is provided, the outer gear ring is fixed on the outer wall of the inner rotating cylinder, and the lower end of the driving gear extends into the outer cylinder along the through groove and meshes with the outer gear ring.

[0018] Further: the specific steps of step S2: processing the inner pipe of the nut are as follows:

[0019] B1: Casting the inner pipe of the nut through a forming mold;

[0020] B2: After forming, the outer surface of the inner tube of the nut is processed to the required size by a machine tool;

[0021] B3: After the processing in step B2 is completed, an external thread for connecting the nut outer pipe fitting is processed on the outer wall of the nut inner pipe fitting.

[0022] Furthermore: the molding mold is composed of a molding lower mold and a molding upper mold, the molding lower mold is fixed on the rotating shaft through a connecting piece, the rotating shaft is horizontally connected between the left support frame and the right support frame, the left support frame is equipped with a flipping motor, the flipping motor is connected to the rotating shaft, the molding lower mold flips along with the rotating shaft under the action of the flipping motor, the molding upper mold is fixed on the bottom of the top plate, and the top plate is connected to the left support frame and the right support frame through a telescopic electric cylinder.

[0023] Furthermore: a condensing agent storage box is fixed on the top of the top plate, and a discharging pump is installed at the bottom of the condensing agent storage box, and the discharging pump is respectively connected with the left cooling hood and the right cooling hood through a diverter, and a cavity for filling the condensing agent is provided in the side walls of the left cooling hood and the right cooling hood, and the condensing agent storage box is connected with the condenser fixed at the bottom of the top plate, and the top of the left cooling hood and the right cooling hood are provided with a first joint and a second joint connected with the diverter, and the bottom of the left cooling hood and the right cooling hood are both provided with an electromagnetic switch valve, and the condenser is respectively connected to the electromagnetic switch valve at the bottom of the left cooling hood and the right cooling hood through a confluence, and the left support frame and the right support frame are both installed with a translation electric cylinder, and the left cooling hood and the right cooling hood are respectively connected to the translation electric cylinders on both sides, and the right end surface of the left cooling hood and the left end surface of the right cooling hood are provided with a groove matching the molding mold, and the left cooling hood and the right cooling hood are provided with a through hole relative to the rotating shaft.

[0024] Furthermore: an extruded combined copper nut made by the above-mentioned processing method includes a nut outer tube and a nut inner tube, and the ends of the nut outer tube and the nut inner tube are extruded and locked by an extrusion molding machine. The nut outer tube is composed of a nut outer end, a first transition part and a tubular connecting part connected in sequence, and the nut inner tube is composed of a matching part, a second transition part, a threaded part and a positioning part connected in sequence. An external thread for connection is provided on the outer wall of the threaded part, and an internal thread matching the external thread is provided on the inner wall of the tubular connecting part relative to the position of the threaded part.

[0025] After adopting the above structure, the beneficial effects of the present invention are as follows:

[0026] The present invention can respectively quickly form a nut outer pipe fitting and a threaded inner pipe fitting through stamping and casting, and can quickly complete the locking work between the nut outer pipe fitting and the threaded inner pipe fitting through extrusion molding. By adopting this method, the processing efficiency is greatly improved, and the generation of waste can be greatly reduced, which plays a role in reducing costs.

[0027] The present invention replaces conventional turning and milling processing by bidirectional stamping, which greatly speeds up the forming of the nut outer pipe fitting.

[0028] The invention can automatically adjust the length of the required cutting rod according to the size of the nut outer pipe part, thereby increasing the practical performance.

[0029] The present invention can accelerate the cooling of the threaded inner pipe fitting by means of the left cooling cover and the right cooling cover when the threaded inner pipe fitting is formed, thereby achieving the purpose of accelerating the casting and forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Figure 1 It is a structural schematic diagram of the combined copper nut.

[0032] Figure 2 This is a structural diagram of the pipe fitting inside the nut.

[0033] Figure 3 This is the structural diagram of the nut outer pipe fitting.

[0034] Figure 4 This is the structural diagram of the stamping machine.

[0035] Figure 5 for Figure 4 A is an enlarged view of the middle image.

[0036] Figure 6 This is a structural diagram of the cutting device.

[0037] Figure 7 This is the connection structure diagram of the molding die.

[0038] In the figure: 1 is a nut outer pipe, 1-1 is a tubular connecting part, 1-2 is a first transition part, 1-3 is a nut outer end, 2 is a nut inner pipe, 2-1 is a matching part, 2-2 is a second transition part, 2-3 is a threaded part, 2-4 is a positioning part, 3 is a support base, 4 is an outer cylinder, 5 is an inner rotating cylinder, 6 is a first supporting connecting part, 7 is a second supporting connecting part, 8 is a stamping lower die, 9 is a stamping upper die, 10 is a clamping electric cylinder, 11 is a mounting frame, 12 is a driving gear, 13 is a left support seat, 14 is a right support seat, 15 is a first punch head, 16 is a second punch head, 17 is an outer gear ring, 19 is an upper support plate, 20 21 is the bottom plate, 22 is the upper right clamping seat, 23 is the lower right clamping seat, 24 is the upper left clamping seat, 25 is the lower left clamping seat, 26 is the adjusting electric cylinder, 27 is the baffle, 28 is the lifting electric cylinder, 29 is the mounting seat, 30 is the electric cutting tool, 31 is the second clamping electric cylinder, 32 is the first clamping electric cylinder, 33 is the left support frame, 34 is the right support frame, 35 is the forming lower mold, 36 is the forming upper mold, 37 is the flip motor, 38 is the left cooling cover, 39 is the right cooling cover, 40 is the top plate, 41 is the condensate storage box, 42 is the discharge pump, 43 is the condenser, 44 is the telescopic electric cylinder, and 45 is the translation electric cylinder. DETAILED DESCRIPTION

[0039] The present invention provides a method for processing an extruded combined copper nut, which specifically comprises the following steps:

[0040] S1: Processing of nut outer pipe fittings: Processing the nut outer pipe fittings by stamping and processing an internal thread for installing the nut inner pipe fittings at one end of the nut outer pipe fittings;

[0041] S2: Processing of the inner pipe fitting of the nut: directly process the inner pipe fitting of the nut by casting, and then process the outer thread of the inner pipe fitting of the nut for connecting the outer pipe fitting of the nut;

[0042] S3: extrusion molding: screwing the inner tube of the nut processed in step S2 into the outer tube of the nut, and then sending the connection part of the inner tube of the nut and the outer tube of the nut into an extrusion molding machine, and locking the inner tube of the nut in the outer tube of the nut by extrusion molding;

[0043] S4: Processing of the outer surface and the inner thread of the nut: After the processing in step S3 is completed, the inner thread of the nut is firstly processed at the inner hole of the inner pipe of the nut, and then the outer surface of the outer pipe of the nut is finely processed.

[0044] The above-mentioned step S1: the specific steps of processing the nut outer pipe fitting are as follows:

[0045] A1: Process the iron or stainless steel bars into the required length through the cutting device;

[0046] A2: The rod processed in step A1 is then sent to an induction heating device for heating;

[0047] A3: Then the heated bar is sent into the stamping machine, and the nut outer pipe fittings are processed by bidirectional stamping;

[0048] A4: After the nut outer pipe fitting processed in step S3 is cooled, an internal thread for installing the nut inner pipe fitting is processed in one end of the nut outer pipe fitting by a machine tool.

[0049] like Figure 6The cutting device shown includes a base plate 20, an upper support plate 19, a guide roller assembly 21, a left clamping assembly, a right clamping assembly, an electric cutting tool 30, a mounting seat 29 and a lifting cylinder 28. The upper support plate 19 is fixed to the top of the base plate 20 through a column. There are a plurality of guide roller assemblies 21, which are arranged from left to right between the upper support plate 19 and the base plate 20. The left clamping assembly is composed of an upper left clamping seat 24, a lower left clamping seat 25 and a first clamping cylinder 32. The lower left clamping seat 25 is fixed to the base plate 20. The upper left clamping seat 24 is located above the lower left clamping seat 25 and is connected to the first clamping cylinder 32 installed on the upper support plate 19. The upper left clamping seat 24 is driven by the first clamping cylinder 32. Covered on the lower left clamping seat 25, the right clamping assembly is composed of the upper right clamping seat 22, the lower right clamping seat 23 and the second clamping electric cylinder 31. The lower right clamping seat 23 is fixed on the bottom plate on the right side of the lower left clamping seat 25. The upper right clamping seat 22 is located directly above the lower right clamping seat 23 and is connected to the second clamping electric cylinder 31 installed on the upper support plate 19. The upper right clamping seat 22 is covered on the lower right clamping seat 23 by the drive of the second clamping electric cylinder 31. A lifting electric cylinder 28 is installed on the upper support plate 19. The output shaft end of the lifting electric cylinder 28 passes through the upper support plate 19 and is connected to the mounting seat 29. The electric cutting tool 30 is connected to the mounting seat 29. The electric cutting tool 30 cuts the rods between the left clamping assembly and the right clamping assembly with the cooperation of the lifting electric cylinder 28. The bar is transported to the left along with the guide roller assembly. After the bar extends into the lower left clamping seat for a certain length, the first clamping electric cylinder and the second clamping electric cylinder are started to clamp the bar using the left clamping assembly and the right clamping assembly. Then the electric cutting tool is started, and the electric cutting tool is raised and lowered under the action of the lifting electric cylinder, and the cutting of the bar is completed by cooperating with the lifting electric cylinder.

[0050] like Figure 6 The top of the upper left clamping seat 24 is provided with a notch, and an adjusting electric cylinder 26 is installed on the top of the upper left clamping seat 24. The shaft end of the adjusting electric cylinder 26 is connected to a baffle 27, and the lower end of the baffle 27 extends from the notch into the upper left clamping seat 24. The present invention adopts the above structure to accurately adjust the cutting length of the bar material, which plays a role in increasing practical performance.

[0051] like Figure 4The stamping forming machine shown includes an outer cylinder 4, an inner rotating cylinder 5, a support base 3, a stamping lower mold 8, a stamping upper mold 9, a mold closing electric cylinder 10, a left support base 13, a right support base 14, a first stamping electric cylinder, a second stamping electric cylinder, a first punching head 15 and a second punching head 16. The outer cylinder 4 is supported by a support base 3 arranged at the bottom, the inner rotating cylinder 5 is driven to rotate and connected in the outer cylinder 4 by a rotary drive mechanism, the stamping lower mold 8 is fixed to the inner wall of one end of the inner rotating cylinder 5 by a first supporting connector 6, the stamping upper mold 9 is opposite to the stamping lower mold 8 and is connected to the mold closing electric cylinder 10, and the mold closing electric cylinder 10 is connected to the mold closing electric cylinder 10 by a first supporting connector 6. The second supporting connector 7 is fixed on the inner wall of the other end of the inner drum 5, the left supporting seat 13 is arranged on the outer wall of the left end of the outer drum 4 and connected to it, the first stamping electric cylinder is installed on the left supporting seat 13 and connected to the first punching head 15, the lower stamping die 8 is provided with a first punching hole matching the first punching head 15, the right supporting seat 14 is arranged on the outer wall of the right end of the outer drum 4 and connected to it, the second stamping electric cylinder is installed on the right supporting seat 14 and connected to the second punching head 16, and the upper stamping die 9 is provided with a second punching hole matching the second punching head 16. The heated bar is first placed in the lower stamping die, and then the closing die electric cylinder is started to cover the upper stamping die on the lower stamping die, and then the inner drum is rotated as a whole so that the upper stamping die and the lower stamping die are arranged horizontally, and then the stamping electric cylinders on both sides are started, and the forming work of the nut outer pipe fitting is completed by the cooperation of the two stamping heads with the upper stamping die and the lower stamping die. The present invention replaces conventional turning and milling processing by bidirectional stamping, which greatly speeds up the forming of the nut outer pipe fitting.

[0052] like Figure 5 The rotary drive mechanism shown includes a mounting frame 11, a driving gear 12, a rotary drive servo motor and an outer gear ring 17. The mounting frame 11 is arranged on the top of the outer cylinder 4 and is connected to it as a whole. The rotary drive servo motor is fixed on the mounting frame 11 and connected to the driving gear 12. A through slot for the driving gear 12 to extend into the top of the outer cylinder 4 is provided. The outer gear ring 17 is fixed on the outer wall of the inner drum 5. The lower end of the driving gear 12 extends into the outer cylinder 4 along the through slot and meshes with the outer gear ring 17. This design has the advantages of simple structure, easy manufacturing, practicality and high efficiency.

[0053] The above-mentioned step S2: the specific steps of processing the inner tube of the nut are as follows:

[0054] B1: Casting the inner pipe of the nut through a forming mold;

[0055] B2: After forming, the outer surface of the inner tube of the nut is processed to the required size by a machine tool;

[0056] B3: After the processing in step B2 is completed, an external thread for connecting the nut outer pipe fitting is processed on the outer wall of the nut inner pipe fitting.

[0057] like Figure 7 The molding die shown is composed of a molding lower die 35 and a molding upper die 36. The molding lower die 35 is fixed on a rotating shaft through a connecting piece. The rotating shaft is horizontally connected between the left support frame 33 and the right support frame 34. A flip motor 37 is installed on the left support frame 33. The flip motor 37 is connected to the rotating shaft. The molding lower die 35 flips along with the rotating shaft under the action of the flip motor 37. The molding upper die 36 is fixed at the bottom of the top plate 40. The top plate 40 is connected to the left support frame 33 and the right support frame 34 through a telescopic electric cylinder 44. When working, the telescopic electric cylinder is started to cover the molding upper die on the molding lower die, and then copper water is injected into the molding die. After the copper water is cooled and formed, the telescopic electric cylinder is reversely started to separate the molding upper die from the molding lower die, and then the flip motor is started to automatically demould by the gravity of the pipe fitting inside the nut.

[0058] like Figure 7 A condensing agent storage box 41 is fixed on the top of the top plate 40, and a discharge pump 42 is installed at the bottom of the condensing agent storage box 41. The discharge pump 42 is connected to the left cooling cover 38 and the right cooling cover 39 through a splitter. The side walls of the left cooling cover 38 and the right cooling cover 39 are provided with cavities for filling the condensing agent. The condensing agent storage box 41 is connected to a condenser 43 fixed to the bottom of the top plate 40. The tops of the left cooling cover 38 and the right cooling cover 39 are provided with a first joint and a second joint connected to the splitter. The bottom of the cooling cover 39 is provided with an electromagnetic switch valve, the condenser 43 is connected to the electromagnetic switch valves at the bottom of the left cooling cover 38 and the right cooling cover 39 through a confluence, the left support frame 33 and the right support frame 34 are both installed with a translation electric cylinder 45, the left cooling cover 38 and the right cooling cover 39 are respectively connected to the translation electric cylinders 45 on both sides, the right end face of the left cooling cover 38 and the left end face of the right cooling cover 39 are provided with grooves matching the forming mold, and the left cooling cover 38 and the right cooling cover 39 are provided with through holes at positions relative to the rotating shaft. The present invention can accelerate the cooling of the threaded inner pipe fittings through the left cooling cover and the right cooling cover when the threaded inner pipe fittings are formed, thereby achieving the purpose of accelerating the casting and forming.

[0059] like Figure 1 , Figure 2 and Figure 3The extruded combined copper nut includes an outer nut pipe 1 and an inner nut pipe 2. The ends of the outer nut pipe 1 and the inner nut pipe 2 are extruded and locked by an extrusion molding machine. The outer nut pipe 1 is composed of an outer nut end 1-3, a first transition portion 1-2 and a tubular connecting portion 1-1 connected in sequence. The inner nut pipe 2 is composed of a matching portion 2-1, a second transition portion 2-2, a threaded portion 2-3 and a positioning portion 2-4 connected in sequence. An external thread for connection is arranged on the outer wall of the threaded portion 2-3, and an internal thread matching the external thread is arranged on the inner wall of the tubular connecting portion 1-1 relative to the threaded portion 2-3. The inner nut pipe in the present invention is made of copper, while the outer nut pipe is made of iron or stainless steel. In this way, not only can the nut assembly be disassembled quickly when it is stuck, but also the cost is greatly reduced, which plays a role in increasing practical performance.

[0060] In summary, the present invention can quickly form nut outer pipe fittings and threaded inner pipe fittings respectively through stamping and casting, and can quickly complete the locking work between the nut outer pipe fittings and the threaded inner pipe fittings through extrusion molding. By adopting this method, the processing efficiency is greatly improved, and the generation of waste can be greatly reduced, thereby reducing costs.

[0061] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A method for processing an extruded combined copper nut, characterized in that: The specific steps include: S1: Processing of nut outer pipe fittings: Processing the nut outer pipe fittings by stamping and processing an internal thread for installing the nut inner pipe fittings at one end of the nut outer pipe fittings; S2: Processing of the inner pipe fitting of the nut: directly process the inner pipe fitting of the nut by casting, and then process the outer thread of the inner pipe fitting of the nut for connecting the outer pipe fitting of the nut; S3: extrusion molding: screwing the inner tube of the nut processed in step S2 into the outer tube of the nut, and then sending the connection part of the inner tube of the nut and the outer tube of the nut into an extrusion molding machine, and locking the inner tube of the nut in the outer tube of the nut by extrusion molding; S4: Processing of the outer surface and the inner thread of the nut: After the processing in step S3 is completed, the inner thread of the nut is firstly processed at the inner hole of the inner pipe of the nut, and then the outer surface of the outer pipe of the nut is finely processed; The specific steps of step S1: nut outer pipe processing are as follows: A1: Process the iron or stainless steel bars into the required length through the cutting device; A2: The rod processed in step A1 is then sent to an induction heating device for heating; A3: Then the heated bar is sent into the stamping machine, and the nut outer pipe fittings are processed by bidirectional stamping; A4: After the nut outer pipe fitting processed in step S3 is cooled, an internal thread for installing the nut inner pipe fitting is processed in one end of the nut outer pipe fitting by a machine tool; The stamping forming machine comprises an outer cylinder, an inner rotating cylinder, a support base, a stamping lower mold, a stamping upper mold, a mold-closing electric cylinder, a left support base, a right support base, a first stamping electric cylinder, a second stamping electric cylinder, a first punching head and a second punching head. The outer cylinder is supported by a support base arranged at the bottom. The inner rotating cylinder is driven to rotate and connected in the outer cylinder by a rotary drive mechanism. The stamping lower mold is fixed to the inner wall of one end of the inner rotating cylinder by a first support connector. The stamping upper mold faces the stamping lower mold and is connected to the mold-closing electric cylinder. The mold-closing electric cylinder is connected to the outer cylinder by a second support connector. The connecting piece is fixed on the inner wall of the other end of the inner drum, the left support seat is arranged on the outer wall of the left end of the outer cylinder and is connected to it as a whole, the first stamping electric cylinder is installed on the left support seat and is connected to the first stamping head, the stamping lower die is provided with a first stamping hole matching the first stamping head at a position relative to the first stamping head, the right support seat is arranged on the outer wall of the right end of the outer cylinder and is connected to it as a whole, the second stamping electric cylinder is installed on the right support seat and is connected to the second stamping head, and the stamping upper die is provided with a second stamping hole matching the second stamping head at a position relative to the second stamping head; The rotary drive mechanism includes a mounting frame, a driving gear, a rotary drive servo motor and an outer gear ring. The mounting frame is arranged on the top of the outer cylinder and is connected to it as an integral unit. The rotary drive servo motor is fixed on the mounting frame and is connected to the driving gear. A through groove for the driving gear to extend into the top of the outer cylinder is provided. The outer gear ring is fixed on the outer wall of the inner rotating cylinder. The lower end of the driving gear extends into the outer cylinder along the through groove and meshes with the outer gear ring.

2. The method for processing an extruded combined copper nut according to claim 1, characterized in that: The cutting device includes a base plate, an upper support plate, a guide roller assembly, a left clamping assembly, a right clamping assembly, an electric cutting tool, a mounting seat and a lifting cylinder. The upper support plate is fixed to the top of the base plate through a column. A plurality of guide roller assemblies are provided, and the plurality of guide roller assemblies are sequentially arranged between the upper support plate and the base plate from left to right. The left clamping assembly is composed of an upper left clamping seat, a lower left clamping seat and a first clamping electric cylinder. The lower left clamping seat is fixed to the base plate. The upper left clamping seat is located directly above the lower left clamping seat and is connected to the first clamping electric cylinder installed on the upper support plate. The upper left clamping seat is connected to the first clamping electric cylinder through the driving cover of the first clamping electric cylinder. The right clamping assembly is composed of an upper right clamping assembly, a lower right clamping assembly and a second clamping electric cylinder. The lower right clamping assembly is fixed to the bottom plate on the right side of the lower left clamping assembly. The upper right clamping assembly is located directly above the lower right clamping assembly and is connected to the second clamping electric cylinder installed on the upper support plate. The upper right clamping assembly is closed on the lower right clamping assembly through the driving cover of the second clamping electric cylinder. A lifting electric cylinder is installed on the upper support plate. The output shaft end of the lifting electric cylinder passes through the upper support plate and is connected to the mounting seat. The electric cutting tool is connected to the mounting seat. The electric cutting tool cuts the rods between the left clamping assembly and the right clamping assembly with the cooperation of the lifting electric cylinder.

3. The method for processing an extruded combined copper nut according to claim 2, characterized in that: A notch is provided on the top of the upper left clamping seat, an adjusting electric cylinder is installed on the top of the upper left clamping seat, the shaft end of the adjusting electric cylinder is connected to the baffle, and the lower end of the baffle extends into the upper left clamping seat from the notch.

4. The method for processing an extruded combined copper nut according to claim 1, characterized in that: The specific steps of step S2: processing the inner tube of the nut are as follows: B1: Casting the inner pipe of the nut through a forming die; B2: After forming, the outer surface of the inner tube of the nut is processed to the required size by a machine tool; B3: After the processing in step B2 is completed, an external thread for connecting the nut outer pipe fitting is processed on the outer wall of the nut inner pipe fitting.

5. The method for processing an extruded combined copper nut according to claim 4, characterized in that: The molding mold is composed of a molding lower mold and a molding upper mold. The molding lower mold is fixed on the rotating shaft through a connecting piece. The rotating shaft is horizontally connected between the left support frame and the right support frame. A flip motor is installed on the left support frame. The flip motor is connected to the rotating shaft. The molding lower mold flips along with the rotating shaft under the action of the flip motor. The molding upper mold is fixed on the bottom of the top plate. The top plate is connected to the left support frame and the right support frame through a telescopic electric cylinder.

6. The method for processing an extruded combined copper nut according to claim 5, characterized in that: A condensing agent storage box is fixed on the top of the top plate, and a discharging pump is installed at the bottom of the condensing agent storage box, and the discharging pump is respectively connected with the left cooling cover and the right cooling cover through a diverter, and a cavity for filling the condensing agent is provided in the side walls of the left cooling cover and the right cooling cover, and the condensing agent storage box is connected with the condenser fixed at the bottom of the top plate, and the tops of the left cooling cover and the right cooling cover are provided with a first joint and a second joint connected with the diverter, and the bottoms of the left cooling cover and the right cooling cover are both provided with an electromagnetic switch valve, and the condenser is respectively connected with the electromagnetic switch valve at the bottom of the left cooling cover and the right cooling cover through a confluence, and the left supporting frame and the right supporting frame are both installed with a translation electric cylinder, and the left cooling cover and the right cooling cover are respectively connected to the translation electric cylinders on both sides, and the right end surface of the left cooling cover and the left end surface of the right cooling cover are provided with a groove matching the molding mold, and the left cooling cover and the right cooling cover are provided with a through hole at a position relative to the rotating shaft.

7. A method for processing an extruded combined copper nut according to any one of claims 1 to 6, characterized in that: The extruded combined copper nut made by the above-mentioned processing method specifically includes a nut outer pipe fitting and a nut inner pipe fitting. The ends of the nut outer pipe fitting and the nut inner pipe fitting are extruded and locked by an extrusion molding machine. The nut outer pipe fitting is composed of a nut outer end, a first transition part and a tubular connecting part connected in sequence, and the nut inner pipe fitting is composed of a matching part, a second transition part, a threaded part and a positioning part connected in sequence. An external thread for connection is provided on the outer wall of the threaded part, and an internal thread matching the external thread is provided on the inner wall of the tubular connecting part relative to the position of the threaded part.

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