High-temperature electromagnetic forming tool and method for steel-lead composite pipe

Abstract

The invention relates to the technical field of electromagnetic forming, in particular to a high-temperature electromagnetic forming tool and method for a steel-lead composite pipe. The tool comprises a heating mechanism, a first clamping mechanism, a transferring mechanism, a second clamping mechanism and an electromagnetic forming mechanism. The heating mechanism is used for heating the lead pipe; the first clamping mechanism is used for clamping the lead pipe so that the lead pipe can be coaxially kept in the heating mechanism. The transfer mechanism is connected with the first clamping mechanism to drive the first clamping mechanism to move; the second clamping mechanism is used for clamping the steel pipe; the electromagnetic forming mechanism is coaxially arranged in the steel pipe in a penetrating manner; in the working state, the transferring mechanism drives the first clamping mechanism to be close to the second clamping mechanism so that the lead pipe can be arranged in the steel pipe in a penetrating mode and arranged outside the electromagnetic forming mechanism in a sleeving mode. Rapid and accurate operation between the steel-lead pipes can be achieved, and the interface strength and the long-term service stability of the composite pipe can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic forming, and in particular to a high-temperature electromagnetic forming tool and method for a steel-lead composite pipe. Background Art

[0002] In the field of radiation medicine, radiation protection materials are an indispensable component to protect medical staff and patients, and lead alloy materials are commonly used. However, the strength of lead is relatively low and it is difficult to withstand high-intensity loads. To solve this problem, people have proposed a steel / lead layered composite material solution, which meets the requirements of radiation protection of the inner layer and bearing capacity of the outer layer of the radiation protection component, and realizes the combination of the advantages of different metals. Steel-lead composite materials have now become an important radiation protection material and are used in radiation medicine, nuclear power plants and other fields.

[0003] In the prior art, steel-lead composite materials are mainly prepared by indirect connection techniques such as bonding. The bonding method is mainly to connect by epoxy resin adhesive, so that the steel-lead layer is almost completely fitted, and the interface shear strength is high, which is the main way of steel-lead composite at present. However, during long-term use and storage, the bonding layer will have pores, aging and local debonding, resulting in strength degradation problems, which will bring major protection risks to nuclear industrial equipment in severe cases. To solve this problem, the inventor of the present invention has proposed to use electromagnetic forming method to high-speed composite lead pipe and steel pipe, and heat the pipe fittings at the same time to accelerate the diffusion of interface elements, so as to promote the high-strength metallurgical bonding of steel-lead interface, and ensure the long-term service performance between steel pipe and lead pipe. However, after the alloy pipe is heated in the heating furnace, it is more troublesome to transfer it to the electromagnetic forming fixture: the high temperature is not easy to hold and operate accurately, and during the clamping process, the lead alloy is also easy to contact with the discharge coil, damaging the outer protective layer of the coil, causing danger. At the same time, the long assembly and adjustment process causes the temperature of the lead pipe to drop significantly, affecting the bonding strength.

[0004] In view of this, the present invention proposes a high-temperature electromagnetic forming tool for steel-lead composite pipes, which realizes fast and precise operation between steel-lead pipes. During the clamping process, the risk of contact between the lead alloy and the discharge coil and damage to the outer protective layer of the coil is avoided. Summary of the invention

[0005] The present application provides a high-temperature electromagnetic forming tool and method for steel-lead composite pipes, which uses induction heating of lead alloy pipes instead of heating in a heating furnace. With the help of the tool, fast and precise operations between steel-lead pipes are achieved. During the clamping process, the risk of contact between the lead alloy and the discharge coil, which would damage the outer protective layer of the coil, is avoided.

[0006] This application is implemented through the following technical solutions:

[0007] In a first aspect, the present application provides a high-temperature electromagnetic forming tool for a steel-lead composite pipe, comprising:

[0008] a heating mechanism for heating the lead pipe;

[0009] a first clamping mechanism, the first clamping mechanism being used to clamp the lead pipe so as to keep the lead pipe coaxially in the heating mechanism;

[0010] A transfer mechanism, wherein the transfer mechanism is connected to the first clamping mechanism to drive the first clamping mechanism to move;

[0011] A second clamping mechanism, the second clamping mechanism is used to clamp the steel pipe;

[0012] An electromagnetic forming mechanism, wherein the electromagnetic forming mechanism is coaxially disposed in the steel pipe;

[0013] In the working state, the transfer mechanism drives the first clamping mechanism to approach the second clamping mechanism so that the lead pipe is inserted into the steel pipe and is sleeved outside the electromagnetic forming mechanism.

[0014] The high-temperature electromagnetic forming tooling for steel-lead composite pipes provided in the present application uses a heating mechanism to uniformly heat the lead pipe to improve its plasticity. The first clamping mechanism stably fixes the lead pipe during the heating process to avoid displacement. The transfer mechanism realizes the convenient transfer of the high-temperature lead pipe from the heating position to the forming position, which solves the risks of temperature loss, low clamping efficiency and contact between the lead pipe and the electromagnetic coil in traditional full manual operation. The second clamping mechanism ensures that the position of the steel pipe is fixed, so that the transferred lead pipe can be quickly and coaxially nested in the inner layer of the steel pipe, and finally realizes efficient metallurgical bonding of the steel-lead bimetallic interface at high temperature, which not only avoids the aging problem of the bonding process, but also overcomes the safety hazards and temperature fluctuation defects in the transfer process of the split tooling, and significantly improves the interface strength and long-term service stability of the composite pipe.

[0015] In some optional embodiments, the heating mechanism is configured as an induction heating coil.

[0016] In some optional embodiments, the transfer mechanism is configured as a crank slider mechanism.

[0017] In some optional embodiments, the transfer mechanism includes:

[0018] Linear slide mechanism;

[0019] A swing rod, one end of which is rotatably connected to the slider in the linear sliding mechanism, and the other end of which is rotatably connected to the first clamping mechanism.

[0020] In some optional embodiments, the first clamping mechanism is configured with a lifting mechanism.

[0021] In some optional embodiments, the lifting mechanism is configured as a scissors lift.

[0022] In some optional embodiments, the first clamping mechanism is connected to the rocker arm via a universal joint.

[0023] In some optional embodiments, the first clamping mechanism includes a first supporting ring and a first fixing bolt, and the first fixing bolt is threadedly connected to the first supporting ring.

[0024] In some optional embodiments, the second clamping mechanism includes a second supporting ring and a second fixing bolt, and the second fixing bolt is threadedly connected to the second supporting ring.

[0025] In a second aspect, the present application provides a steel-lead composite pipe forming method, which is implemented based on any one of the steel-lead composite pipe high-temperature electromagnetic forming tooling described in the first aspect, and includes the following steps:

[0026] The lead pipe is clamped by a first clamping mechanism and is kept in the heating device;

[0027] The steel pipe is clamped by a second clamping mechanism, and the steel pipe is sleeved outside the electromagnetic forming mechanism;

[0028] The lead pipe is heated by a heating device;

[0029] After the lead pipe is heated, the first clamping mechanism is driven to move by the transfer mechanism so that the lead pipe is coaxially inserted into the steel pipe and sleeved outside the electromagnetic forming mechanism;

[0030] The electromagnetic forming mechanism is activated to realize electromagnetic forming of high-temperature lead pipes and steel pipes.

[0031] The steel-lead composite pipe forming method provided in the present application, firstly, the first clamping mechanism cooperates with the independent heating station to complete the axial positioning of the lead pipe in the softened state, avoiding the intergranular corrosion of the steel pipe caused by the traditional co-heating; secondly, the double clamping system realizes the spatial decoupling of the steel / lead pipe, and ensures the precise coaxiality of the two pipes before the electromagnetic field acts through the positioning accuracy of the transfer mechanism; finally, with the help of the instantaneous forming pressure generated by the high-frequency electromagnetic pulse, the high-temperature lead pipe and the cold steel pipe produce a metallurgical-mechanical dual combination, the interface shear strength is large, and the electromagnetic forming process synchronously completes the nano-scale crushing of the oxide layer on the surface of the lead pipe to form a gradient diffusion layer. This method can shorten the production cycle of the composite pipe and improve the yield rate.

[0032] Compared with the prior art, this application has the following advantages and beneficial effects:

[0033] 1. The high-temperature electromagnetic forming tooling for steel-lead composite pipes provided in the present application uses a heating mechanism to uniformly heat the lead pipe to improve its plasticity. The first clamping mechanism stably fixes the lead pipe during the heating process to avoid displacement; the transfer mechanism realizes the convenient transfer of the high-temperature lead pipe from the heating position to the forming position, which solves the risks of temperature loss, low clamping efficiency and contact between the lead pipe and the electromagnetic coil in traditional full manual operation; the second clamping mechanism ensures that the position of the steel pipe is fixed, so that the transferred lead pipe can be quickly and coaxially nested in the inner layer of the steel pipe, and finally realizes efficient metallurgical bonding of the steel-lead bimetallic interface at high temperature, which not only avoids the aging problem of the bonding process, but also overcomes the safety hazards and temperature fluctuation defects in the transfer process of the split tooling, and significantly improves the interface strength and long-term service stability of the composite pipe.

[0034] 2. The steel-lead composite pipe forming method provided by the present application, firstly, the first clamping mechanism cooperates with the independent heating station to complete the axial positioning of the lead pipe in the softened state, avoiding the intergranular corrosion of the steel pipe caused by the traditional co-heating; secondly, the double clamping system realizes the spatial decoupling of the steel / lead pipe, and ensures the precise coaxiality of the two pipes before the electromagnetic field acts through the positioning accuracy of the transfer mechanism; finally, with the help of the instantaneous forming pressure generated by the high-frequency electromagnetic pulse, the high-temperature lead pipe and the cold steel pipe produce a metallurgical-mechanical dual combination, the interface shear strength is large, and the electromagnetic forming process synchronously completes the nano-scale crushing of the oxide layer on the surface of the lead pipe to form a gradient diffusion layer. This method can shorten the production cycle of composite pipes and improve the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0036] Figure 1 A schematic diagram of a high-temperature electromagnetic forming tooling structure for a steel-lead composite pipe provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of the transfer mechanism structure provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the structure of a first clamping mechanism provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the structure of a second clamping mechanism provided in an embodiment of the present application;

[0040] Figure 5 Schematic diagram of the steel-lead composite pipe forming method provided in the embodiment of the present application Figure 1 ;

[0041] Figure 6 Schematic diagram of the steel-lead composite pipe forming method provided in the embodiment of the present application Figure 2 ;

[0042] Figure 7 Schematic diagram of the steel-lead composite pipe forming method provided in the embodiment of the present application Figure 3 .

[0043] Marks and corresponding parts names in the attached drawings:

[0044] 1-heating mechanism, 2-first clamping mechanism, 21-first supporting ring, 22-first fastening bolt, 3-transferring mechanism, 31-sliding seat, 32-rocker arm, 33-universal joint, 4-second clamping mechanism, 41-second supporting ring, 42-second fastening bolt, 5-electromagnetic forming mechanism, 6-lead pipe, 7-steel pipe, 8-lifting mechanism. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with examples and drawings. The illustrative implementation scheme of the present application and its description are only used to explain the present application and are not intended to limit the present application.

[0046] Unlike common layered composite materials such as steel-aluminum, steel-magnesium, aluminum-magnesium, steel-copper, and aluminum-copper, steel-lead materials neither react nor dissolve in each other in liquid or solid states, and are prone to stratification. Therefore, it is difficult to form metallurgical bonding between steel-lead composite layers, which is also the reason why transition layers such as bonding and welding are used in the prior art. To solve this problem, the inventor has proposed to use electromagnetic composite technology to achieve high-strength bonding of steel and lead. However, through experiments, the inventor found that after the steel-lead material is directly electromagnetically composited, the interface metallurgical reaction is not obvious. Through experiments and theoretical analysis, the inventor proposed a method of electromagnetic forming under a high temperature field, which promotes the melting and mixing of steel and lead on the interface and the diffusion of elements by heating the steel pipe 7, and realizes a transitional bonding layer of a certain depth. At the same time, the temperature gradient residual stress is used to improve the mechanical bonding strength, and a reliable bonding of steel and lead is realized. However, this scheme has the following problems: after the lead alloy tube is heated in the heating furnace, it is more troublesome to transfer it to the electromagnetic forming fixture. The high temperature makes it difficult to hold and operate accurately. During the clamping process, the lead alloy is also easy to contact with the discharge coil, damaging the outer protective layer of the coil, causing danger. At the same time, the long assembly and adjustment process causes the temperature of the lead pipe to drop significantly, which affects the bonding strength. The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0047] First, as Figure 1 to Figure 4As shown, an embodiment of the present application provides a high-temperature electromagnetic forming tool for a steel-lead composite pipe, comprising a heating mechanism 1, a first clamping mechanism 2, a transfer mechanism 3, a second clamping mechanism 4 and an electromagnetic forming mechanism 5; the heating mechanism 1 is used to heat the lead pipe 6; the first clamping mechanism 2 is used to clamp the lead pipe 6 so that the lead pipe 6 is coaxially maintained in the heating mechanism 1; the transfer mechanism 3 is connected to the first clamping mechanism 2 to drive the first clamping mechanism 2 to move; the second clamping mechanism 4 is used to clamp the steel pipe 7; the electromagnetic forming mechanism 5 is coaxially penetrated in the steel pipe 7; in a working state, the transfer mechanism 3 drives the first clamping mechanism 2 to approach the second clamping mechanism 4 so that the lead pipe 6 is penetrated in the steel pipe 7, and is sleeved outside the electromagnetic forming mechanism 5.

[0048] The high-temperature electromagnetic forming tooling for steel-lead composite pipes provided in the embodiment of the present application uniformly heats the lead pipe 6 through the heating mechanism 1 to improve its plasticity. The first clamping mechanism 2 stably fixes the lead pipe 6 during the heating process to avoid displacement. The transfer mechanism 3 realizes the convenient transfer of the high-temperature lead pipe 6 from the heating position to the forming position, which solves the risks of temperature loss, low clamping efficiency and contact between the lead pipe 6 and the electromagnetic coil in the traditional full manual operation. The second clamping mechanism 4 ensures that the position of the steel pipe 7 is fixed, so that the transferred lead pipe 6 can be quickly and coaxially nested in the inner layer of the steel pipe 7, and finally realizes efficient metallurgical bonding of the steel-lead bimetallic interface at high temperature, which not only avoids the aging problem of the bonding process, but also overcomes the safety hazards and temperature fluctuation defects in the transfer process of the split tooling, and significantly improves the interface strength and long-term service stability of the composite pipe.

[0049] In some optional embodiments, the heating mechanism 1 is configured as an induction heating coil, and when the lead pipe 6 is heated in the induction heating coil, the lead pipe 6 is coaxially arranged with the induction heating coil.

[0050] In the embodiment of the present application, the electromagnetic induction principle is used to generate eddy currents inside the lead pipe 6 to achieve non-contact rapid heating. The heating process is precisely controllable (such as by adjusting the frequency to match the resistance characteristics of the lead pipe 6), which can not only avoid surface oxidation or local overheating caused by traditional resistance heating, but also maintain the overall temperature uniformity of the lead pipe 6; at the same time, the induction coil can be integrated with the tooling in the same axial space, so that the lead pipe 6 can be directly transferred to the electromagnetic forming position without being separated from the clamping mechanism after heating, significantly shortening the heat conduction path, ensuring that the temperature loss during the transfer of the lead pipe 6 is small, thereby ensuring the critical temperature conditions required for interface diffusion and improving the stability of metallurgical bonding strength. In addition, the instantaneous start-stop characteristics of induction heating also reduce energy consumption and avoid the external heating furnace occupying site space, which meets the design requirements of compact tooling.

[0051] In some optional embodiments, the transfer mechanism 3 is configured as a crank slider mechanism.

[0052] In the embodiment of the present application, the rotary motion of the crank is converted into the precise linear reciprocating motion of the slider, so that the lead pipe 6 moves smoothly along the preset trajectory with small synchronization error; the rigid transmission characteristics effectively avoid the position drift problem in the pneumatic / hydraulic drive, and ensure the automatic centering accuracy of the high-temperature lead pipe 6 and the axis of the steel pipe 7; when driving with a servo motor, variable speed movement can also be achieved - moving quickly when leaving the heating station to reduce heat dissipation, and switching to a low-speed slow-advance mode when approaching the electromagnetic forming station, so that the end of the lead pipe 6 and the shoulder of the steel pipe 7 can achieve progressive press-in contact, which is more energy-efficient than the traditional linear motor solution. This mechanical drive solution has outstanding anti-electromagnetic interference capabilities in high-temperature environments, and has lower maintenance costs than pneumatic systems. It is particularly suitable for industrial scenarios that require high-frequency continuous production.

[0053] In actual implementation, the transfer mechanism 3 includes a linear sliding mechanism and a rocker arm 32; the linear sliding mechanism includes a slide seat 31 and a slider, a slide slot is provided on the slide seat 31, and the slider cooperates with the slide slot to slide freely along the length direction of the slide slot; one end of the rocker arm 32 is rotatably connected to the slider in the linear sliding mechanism, which means that the rocker arm 32 can rotate around one end of itself, the length of the rocker arm 32 is parallel to the rotation plane of the rocker arm 32, and the other end of the rocker arm 32 is rotatably connected to the first clamping mechanism 2.

[0054] In the embodiment of the present application, when the first clamping mechanism 2 is pulled forward and backward along the axial direction of the lead pipe 6, the slider in the linear sliding mechanism can slide under the drive of the rocker arm 32 to adapt to the position of the first clamping mechanism 2. At this time, the connection between the slider and the rocker arm 32 can form a limit on the first clamping mechanism 2 in the left and right directions, which means that if the height of the first clamping mechanism 2 is fixed, then when the first clamping mechanism 2 is pulled forward and backward, it can be ensured that the lead pipe 6 does not contact the heating mechanism 1, so as to avoid collision and damage between the two, thereby ensuring the shape of the lead pipe 6 under high temperature.

[0055] In some optional embodiments, the first clamping mechanism 2 is provided with a lifting mechanism 8 .

[0056] In the embodiment of the present application, through the configuration of the lifting mechanism 8, when the first clamping mechanism 2 is close to the electromagnetic forming position, the height of the lead pipe 6 can be quickly adjusted by the lifting mechanism 8 so that the coaxiality of the lead pipe 6 and the steel pipe 7 meets the requirements, thereby reducing the time for aligning the lead pipe 6 and the steel pipe 7 and reducing temperature loss.

[0057] In some optional embodiments, the lifting mechanism 8 is configured as a scissors lift.

[0058] In the embodiment of the present application, the lifting mechanism 8 is configured as a scissors lift, which has a relatively low cost.

[0059] In some optional embodiments, the first clamping mechanism 2 is connected to the rocker arm 32 via a universal joint 33 .

[0060] In the embodiment of the present application, the universal joint 33 is highly operable and can quickly adjust the posture of the first clamping mechanism 2. For example, the induction heating position and the electromagnetic forming position are in two relative positions. When the lead pipe 6 is withdrawn from the induction heating coil, the first clamping mechanism 2 can be quickly operated to turn the lead pipe 6 180 degrees, and then it can be quickly matched with the steel pipe 7 to reduce temperature loss. In actual implementation, the universal joint 33 is a universal joint 33 with a self-locking function. For example, when its rotation function is not needed, the ball on the universal joint 33 can be kept relatively fixed with the shell by tightening screws. Of course, at this time, the universal joint 33 and the swing rod 32 are connected by a rotating shaft, and the universal structure and the swing rod 32 can rotate relatively, so that the lead pipe 6 can be smoothly withdrawn from the induction heating coil.

[0061] In some optional embodiments, the first clamping mechanism 2 includes a first supporting ring 21 and a first fastening bolt 22 , and the first fastening bolt 22 is threadedly connected to the first supporting ring 21 .

[0062] In the embodiment of the present application, a cushion seat can be set under the first support ring 21 so that the first support ring 21 has a certain height. The first tightening bolts 22 are larger in size, and the number of the first tightening bolts 22 can be set to at least two. The two first tightening bolts 22 are arranged at intervals along the axial direction of the first support ring 21, thereby ensuring the stability of the lead pipe 6 after being fixed.

[0063] In some optional embodiments, the second clamping mechanism 4 includes a second supporting ring 41 and a second fixing bolt 42 , and the second fixing bolt 42 is threadedly connected to the second supporting ring 41 .

[0064] In the embodiment of the present application, a cushion seat can be set under the second support ring 41 so that the second support ring 41 has a certain height. The second fixing bolts 42 are larger in size, and the number of the second fixing bolts 42 can be set to at least two. The two second fixing bolts 42 are arranged at intervals along the axial direction of the second support ring 41, thereby ensuring the stability of the steel pipe 7 after being fixed.

[0065] In the second aspect, the present application provides a method for forming a steel-lead composite pipe, which can be referred to in conjunction with Figure 1 as well as Figure 5 to Figure 7 , based on any one of the steel-lead composite pipe high temperature electromagnetic forming tooling described in the first aspect, comprising the following steps:

[0066] The lead pipe 6 is clamped by the first clamping mechanism 2 and is kept in the heating device;

[0067] The steel pipe 7 is clamped by the second clamping mechanism 4, and the steel pipe 7 is sleeved outside the electromagnetic forming mechanism 5;

[0068] The lead pipe 6 is heated by a heating device;

[0069] After the lead pipe 6 is heated, the first clamping mechanism 2 is driven by the transfer mechanism 3 to move so that the lead pipe 6 is coaxially inserted into the steel pipe 7 and sleeved outside the electromagnetic forming mechanism 5;

[0070] The electromagnetic forming mechanism 5 is started to realize electromagnetic forming of the high-temperature lead pipe 6 and the steel pipe 7 .

[0071] The steel-lead composite pipe forming method provided in the embodiment of the present application, firstly, the first clamping mechanism 2 cooperates with the independent heating station to complete the axial positioning of the lead pipe 6 in the softened state, avoiding the intergranular corrosion of the steel pipe 7 caused by the traditional co-heating; secondly, the double clamping system realizes the spatial decoupling of the steel / lead pipe 6, and the positioning accuracy of the transfer mechanism 3 ensures that the two pipes are precisely coaxial before the electromagnetic field acts; finally, with the help of the instantaneous forming pressure generated by the high-frequency electromagnetic pulse, the high-temperature lead pipe 6 and the cold steel pipe 7 are metallurgically and mechanically combined, the interface shear strength is large, and the electromagnetic forming process simultaneously completes the nano-scale crushing of the surface oxide layer of the lead pipe 6 to form a gradient diffusion layer. This method can shorten the production cycle of the composite pipe and improve the yield rate.

[0072] The above specific embodiments illustrate the implementation methods of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation methods. On the contrary, the purpose of introducing the application in conjunction with the implementation methods is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide an in-depth understanding of the present application, the above description contains many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0073] It should be noted that in this specification, similar numbers and letters represent similar items in the above drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of this application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0074] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A high temperature electromagnetic forming tool for steel-lead composite pipe, characterized in that: include: A heating mechanism (1), the heating mechanism (1) being used to heat the lead pipe (6); A first clamping mechanism (2), the first clamping mechanism (2) being used to clamp the lead pipe (6) so as to keep the lead pipe (6) coaxially in the heating mechanism (1); A transfer mechanism (3), the transfer mechanism (3) being connected to the first clamping mechanism (2) so as to drive the first clamping mechanism (2) to move; A second clamping mechanism (4), the second clamping mechanism (4) being used for clamping the steel pipe (7); An electromagnetic forming mechanism (5), wherein the electromagnetic forming mechanism (5) is coaxially disposed in the steel pipe (7); In the working state, the transfer mechanism (3) drives the first clamping mechanism (2) to approach the second clamping mechanism (4) so ​​that the lead pipe (6) is inserted into the steel pipe (7) and is sleeved outside the electromagnetic forming mechanism (5).

2. The high temperature electromagnetic forming tool for steel-lead composite pipe according to claim 1 is characterized in that: The heating mechanism (1) is configured as an induction heating coil.

3. The high temperature electromagnetic forming tool for steel-lead composite pipe according to claim 1 is characterized in that: The transfer mechanism (3) is configured as a crank slider mechanism.

4. The high temperature electromagnetic forming tool for steel-lead composite pipe according to claim 3 is characterized in that: The transfer mechanism (3) comprises: Linear slide mechanism; A swing rod (32), one end of which is rotationally connected to a slider in the linear sliding mechanism, and the other end of which is rotationally connected to the first clamping mechanism (2).

5. The high temperature electromagnetic forming tool for steel-lead composite pipe according to claim 3 is characterized in that: The first clamping mechanism (2) is provided with a lifting mechanism (8).

6. The high temperature electromagnetic forming tooling for steel-lead composite pipe according to claim 5 is characterized in that: The lifting mechanism (8) is configured as a scissor lift.

7. The high temperature electromagnetic forming tool for steel-lead composite pipe according to claim 4, characterized in that: The first clamping mechanism (2) is connected to the rocker rod (32) via a universal joint (33).

8. The high temperature electromagnetic forming tool for steel-lead composite pipe according to claim 1 is characterized in that: The first clamping mechanism (2) comprises a first supporting ring (21) and a first fixing bolt (22), wherein the first fixing bolt (22) is threadedly connected to the first supporting ring (21).

9. The high temperature electromagnetic forming tool for steel-lead composite pipe according to claim 1, characterized in that: The second clamping mechanism (4) comprises a second supporting ring (41) and a second fixing bolt (42), wherein the second fixing bolt (42) is threadedly connected to the second supporting ring (41).

10. A steel-lead composite pipe forming method, which is implemented based on the steel-lead composite pipe high-temperature electromagnetic forming tooling according to any one of claims 1 to 9, characterized in that: The following steps are involved: The lead pipe (6) is clamped by a first clamping mechanism (2) and the lead pipe (6) is kept in the heating device; The steel pipe (7) is clamped by a second clamping mechanism (4), and the steel pipe (7) is sleeved outside the electromagnetic forming mechanism (5); heating the lead pipe (6) by means of a heating device; After the lead pipe (6) is heated, the first clamping mechanism (2) is driven to move by the transfer mechanism (3) so that the lead pipe (6) is coaxially inserted into the steel pipe (7) and sleeved outside the electromagnetic forming mechanism (5); The electromagnetic forming mechanism (5) is started to realize electromagnetic forming of the high-temperature lead pipe (6) and the steel pipe (7).

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