Retractable electromagnetic induction heating tooling for heating large arc-shaped metal workpieces

Abstract

The present invention relates to a telescopic electromagnetic induction heating tooling for heating large arc-shaped metal workpieces, which comprises a support assembly (1), and a preheating assembly (2) is arranged on the support assembly (1); the support assembly (1) comprises a base (11), and two left and right support frames (12) are arranged on the base (11); the preheating assembly (2) comprises a preheating bracket (21), the preheating bracket (21) is integrally arc-shaped, the preheating bracket (21) is arranged between the two left and right support frames (12), and a plurality of electromagnetic induction heating modules (22) are arranged on the preheating bracket (21) at intervals from front to back. The present invention can make the heating tooling as close as possible to the arc-shaped workpiece to be heated with an irregular diameter that is continuously rotating, and at the same time improve the fault tolerance rate of the induction heating equipment in actual use, thereby improving the production efficiency.

Description

Technical Field

[0001] The present invention relates to a telescopic electromagnetic induction heating tooling for heating large arc-shaped metal workpieces, and belongs to the technical field of electromagnetic induction heating. Background Art

[0002] In traditional manufacturing, it is often necessary to heat metal workpieces. There are generally two traditional heating methods:

[0003] 1. Using flame heating. This heating method requires fuel consumption, and there are waste gas and waste residue emissions during the heating process. Most of the heat is dissipated into the environment during the heating process, wasting a large amount of energy, with low energy utilization rate. Moreover, the workpiece is in contact with the fuel and its oxides during the heating process, which is likely to cause foreign matter intrusion, thus affecting the workpiece quality. In addition, this heating method requires the overall heating of the workpiece and cannot perform local heat treatment, resulting in large energy consumption and large deformation of the workpiece due to overall heating, affecting the finished product quality of the workpiece;

[0004] 2. Using resistance wire heating. Among them, resistance wire heating is more common. However, for resistance wire heating, its heating speed is slow, heat loss is large, thermal efficiency is low, and it is extremely easy to be damaged.

[0005] Electromagnetic induction heating is achieved by passing an alternating current with a certain frequency through an induction coil, generating an alternating magnetic field around the coil. The electromagnetic induction effect of the alternating magnetic field causes a closed induced current, that is, eddy current, to be generated inside the workpiece. The generated eddy current directly heats the metal, thus greatly reducing heat loss and improving energy utilization rate. Therefore, electromagnetic induction is a major development trend for metal workpiece heating.

[0006] Electromagnetic induction heating equipment is a heating equipment manufactured based on the principle of induction heating. The heating tooling is an important component of the induction heating equipment.

[0007] The basic accessories of the existing complete set of electromagnetic induction heating equipment include: an induction heating main unit, a power cord, an extension cord, and an induction heating tooling. Among them, the induction heating main unit converts the input power frequency current into a high-frequency current, creates a high-frequency alternating magnetic field through the heating tooling, and the workpiece to be heated cuts the magnetic force lines, generating a strong eddy current inside, thereby heating itself.

[0008] The commonly used electromagnetic induction heating tooling is composed of a metal wire wrapped with an insulating layer and a support material. First, the metal wire is wound into a spiral shape, and then it is fixed on various types of support materials such as high-silica fabric and epoxy resin materials.

[0009] The electromagnetic induction heating tooling is divided into hard tooling and soft tooling. The soft tooling can arbitrarily change the shape, size, and dimensions of the tooling, but the preparation work before heating and the finishing work after heating are relatively cumbersome. The shape of the hard tooling cannot be changed, but the preparation work before heating and the finishing work after heating are relatively simple.

[0010] At present, the electromagnetic induction heating tooling is usually used to heat metal workpieces with corresponding arcs, such as pipes, bearings, etc. Since the distance between the tooling and the workpiece to be heated should be kept within 1 - 3 cm, if the distance exceeds 3 cm, the induction heating host cannot output full power, and if the distance is too large, the host will report an error and stop working; also, since the diameter of the workpiece to be heated reaches 8 m, the existing heating tooling cannot heat the entire weld at the same time, so a mode is adopted where the tooling remains stationary and the workpiece to be heated rolls for heating. However, due to the deviation of processing accuracy, the diameter of large arc-shaped metal workpieces will have deviations, and the distance from the heating tooling cannot be kept uniform. If the distance is too large, it will cause heating interruption, and if the distance is too small, it will damage the heating tooling. Summary of the Invention

[0011] The technical problem to be solved by the present invention is to provide a telescopic electromagnetic induction heating tooling for heating large arc-shaped metal workpieces in view of the above-mentioned prior art. It can make the heating tooling as close as possible to the arc-shaped workpiece to be heated with an irregular diameter that is constantly rotating, while improving the fault tolerance rate in the actual use of the induction heating equipment and increasing the production efficiency.

[0012] The technical solution adopted by the present invention to solve the above problems is as follows: A telescopic electromagnetic induction heating tooling for heating large arc-shaped metal workpieces, which includes a support assembly, and a preheating assembly is arranged on the support assembly; the support assembly includes a base, and there are two left and right support frames arranged on the base; the preheating assembly includes a preheating bracket, the preheating bracket is integrally arc-shaped, the preheating bracket is arranged between the two left and right support frames, and a plurality of electromagnetic induction heating modules are arranged on the preheating bracket at intervals from front to back.

[0013] Preferably, the support frame includes a front vertical support and a rear vertical support, the height of the rear vertical support is greater than that of the front vertical support, a side support pipe is arranged between the tops of the front vertical support and the rear vertical support, the side support pipe is arc-shaped, and a plurality of screws are arranged on the side support pipe at intervals.

[0014] Preferably, an inclined brace is arranged between the middle of the side support pipe and the rear vertical support, and a track groove is arranged inside the inclined brace, and the track groove is arranged along the radial direction of the side support pipe.

[0015] Preferably, the preheating bracket includes two middle side plates arranged in parallel on the left and right. Peripheral side plates are respectively arranged on the front and rear sides of the middle side plates. The peripheral side plates are hinged to the middle side plates. A plurality of first card slots are formed at the top of the middle side plates. First fixing plates are arranged at corresponding positions inside the middle side plates corresponding to the first card slots. A plurality of second card slots are formed at the top of the peripheral side plates. Second fixing plates are arranged at corresponding positions inside the peripheral side plates corresponding to the second card slots. The electromagnetic induction heating module is arranged between two corresponding first fixing plates on the left and right or between two corresponding second fixing plates on the left and right.

[0016] Preferably, a first roller is arranged at the upper part of the outer side of the first fixing plate. The first roller is placed in the first card slot. A second roller is arranged at the upper part of the outer side of the second fixing plate. The second roller is placed in the second card slot.

[0017] Preferably, a hinge hole is arranged on one side of the peripheral side plate close to the middle side plate. The peripheral side plate is hinged to the middle side plate through a first hinge shaft. An arc-shaped guide groove is arranged below the hinge hole. A limit screw is arranged in the arc-shaped guide groove. The limit screw is connected to the middle side plate.

[0018] Preferably, the preheating bracket includes two middle side plates arranged in parallel on the left and right. Peripheral side plates are respectively arranged on the front and rear sides of the middle side plates. The peripheral side plates are hinged to the middle side plates. A plurality of first card slots are formed at the top of the middle side plates. First fixing plates are arranged at corresponding positions inside the middle side plates corresponding to the first card slots. A plurality of second card slots are formed at the top of the peripheral side plates. Second fixing plates are arranged at corresponding positions inside the peripheral side plates corresponding to the second card slots. The electromagnetic induction heating module is arranged between two corresponding first fixing plates on the left and right or between two corresponding second fixing plates on the left and right.

[0019] Preferably, a first long stud is inserted between the lower parts of two corresponding first fixing plates on the left and right. The left and right ends of the first long stud are respectively connected to screws at corresponding positions on the left and right side support pipes through first tension springs. A second long stud is inserted between the lower parts of two corresponding second fixing plates on the left and right. The left and right ends of the second long stud are respectively connected to screws at corresponding positions on the left and right side support pipes through second tension springs.

[0020] Preferably, at least two guide wheels are arranged on the outer side of the middle side plate along the radial direction. The guide wheels are arranged in a track groove.

[0021] Preferably, the electromagnetic induction heating module includes a wiring groove plate. A plurality of wiring grooves are arranged at intervals from left to right on the wiring groove plate. Metal wires are wound in the plurality of wiring grooves. A wiring groove pressing plate is arranged on the wiring groove plate.

[0022] Compared with the prior art, the advantages of the present invention are as follows:

[0023] 1. The present invention enables the induction heating tooling to be as close as possible to the continuously rotating arc-shaped workpiece with an irregular diameter. The distance between the tooling and the workpiece does not exceed the induction range of 3 cm of the induction heating host, reducing the heating power of the induction heating host and improving the production efficiency.

[0024] 2. The present invention fixes the metal wire wrapped with a heat-insulating and insulating layer on the FR-4 epoxy board to make a rigid tooling, simplifying the preparatory work before heating and the finishing work after heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a retractable electromagnetic induction heating tooling for heating large arc-shaped metal workpieces according to the present invention.

[0026] Figure 2 is Figure 1 a side view of

[0027] Figure 3 is Figure 1 a cross-sectional view at the guide rail groove position of

[0028] Figure 4 is Figure 1 a schematic structural diagram of the support assembly in

[0029] Figure 5 is Figure 4 an A-A cross-sectional view of

[0030] Figure 6 is Figure 5 a B-B cross-sectional view of

[0031] Figure 7 is Figure 1 a three-dimensional structural diagram of the preheating assembly in

[0032] Figure 8 is Figure 7 a front view of

[0033] Figure 9 is Figure 7 a top view of

[0034] Wherein:

[0035] Support assembly 1

[0036] Base 11

[0037] Support frame 12

[0038] Front vertical support 121

[0039] Rear vertical support 122

[0040] Side support pipe 123

[0041] Diagonal brace 124

[0042] Track cushion block 125

[0043] Plug 126

[0044] Longitudinal brace 127

[0045] Cross brace 13

[0046] Track groove 14

[0047] Nut 15

[0048] Screw 16

[0049] Caster 17

[0050] Preheating assembly 2

[0051] Preheating bracket 21

[0052] Electromagnetic induction heating module 22

[0053] Middle side plate 211

[0054] Peripheral side plate 212

[0055] First card slot 213

[0056] First fixing plate 214

[0057] Second card slot 215

[0058] Second fixing plate 216

[0059] First roller 217

[0060] Second roller 218

[0061] Hinge hole 219

[0062] Arc-shaped guide groove 2110

[0063] First tension spring 3

[0064] Second tension spring 4

[0065] Limit stop 5

[0066] First long stud 6

[0067] Second long stud 7

[0068] Guide wheel 8

[0069] First hinge shaft 9

[0070] Limit screw 10. Specific implementation mode

[0071] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings.

[0072] Refer to Figures 1 to 9 , a retractable electromagnetic induction heating tooling for heating large arc-shaped metal workpieces according to the present invention, which includes a support assembly 1, and a preheating assembly 2 is arranged on the support assembly 1;

[0073] The support assembly 1 includes a base 11, two left and right support frames 12 are arranged on the base 11, a cross brace 13 is arranged between the two left and right support frames 12, the support frame 12 includes a front vertical support 121 and a rear vertical support 122, the height of the rear vertical support 122 is greater than that of the front vertical support 121, a side support pipe 123 is arranged between the tops of the front vertical support 121 and the rear vertical support 122, the side support pipe 123 is arc-shaped, an inclined brace 124 is arranged between the middle of the side support pipe 123 and the rear vertical support 122, the inclined brace 124 is arranged along the radial direction of the side support pipe 123, two upper and lower track pads 125 are arranged inside the inclined brace 124, a track groove 14 is arranged between the two upper and lower track pads 125, and a plurality of screws 16 are evenly arranged on the side support pipe 123 at intervals through nuts 15;

[0074] Plug heads 126 are arranged at both the upper and lower ends of the side support pipe 123;

[0075] A longitudinal brace 127 is further arranged between the front vertical support 121 and the rear vertical support 122, and the longitudinal brace 127 is located below the side support pipe 123;

[0076] A plurality of casters 17 are arranged at the bottom of the base 11;

[0077] The preheating assembly 2 includes a preheating bracket 21, the preheating bracket 21 is integrally arc-shaped, and a plurality of electromagnetic induction heating modules 22 are arranged on the preheating bracket 21 at intervals from front to back;

[0078] The preheating bracket 21 includes two left and right parallel middle side plates 211, peripheral side plates 212 are arranged on the front and rear sides of the middle side plates 211 respectively, the peripheral side plates 212 are hinged to the middle side plates 211, a plurality of first card slots 213 are opened at the top of the middle side plates 211, first fixing plates 214 are arranged at the corresponding positions inside the middle side plates 211 in the first card slots 213, a plurality of second card slots 215 are opened at the top of the peripheral side plates 212, second fixing plates 216 are arranged at the corresponding positions inside the peripheral side plates 212 in the second card slots 215, and the electromagnetic induction heating module 22 is arranged between two corresponding first fixing plates 214 on the left and right or between two corresponding second fixing plates 216 on the left and right;

[0079] On the upper part of the outer side of the first fixing plate 214, a first roller 217 is provided, and the first roller 217 is placed in the first card slot 213. On the upper part of the outer side of the second fixing plate 216, a second roller 218 is provided, and the second roller 218 is placed in the second card slot 215;

[0080] A first long stud 6 is installed between the lower parts of the left and right corresponding first fixing plates 214. The left and right ends of the first long stud 6 are respectively connected to the screws 16 at the corresponding positions on the left and right side support pipes 123 through first tension springs 3. A second long stud 7 is installed between the lower parts of the left and right corresponding second fixing plates 216. The left and right ends of the second long stud 7 are respectively connected to the screws 16 at the corresponding positions on the left and right side support pipes 123 through second tension springs 4;

[0081] On the side of the peripheral side plate 212 close to the middle side plate 211, a hinge hole 219 is provided, and the peripheral side plate 212 is hinged to the middle side plate 211 through a first hinge shaft 9;

[0082] Below the hinge hole 219, an arc-shaped guide groove 2110 is provided, and a limit screw 10 is arranged in the arc-shaped guide groove 2110. The limit screw 10 is connected to the middle side plate 211;

[0083] The electromagnetic induction heating module 22 includes a wiring groove plate 221. A plurality of wiring grooves 222 are arranged at intervals from left to right on the wiring groove plate 221. Metal wires wrapped with a heat-insulating and insulating layer are wound in the plurality of wiring grooves 222. A wiring groove pressing plate 223 is arranged on the wiring groove plate 221;

[0084] Both the wiring groove plate 221 and the wiring groove pressing plate 223 are made of FR-4 epoxy boards;

[0085] At least two guide wheels 8 are arranged radially on the outer side of the middle side plate 211, and the guide wheels 8 are arranged in the track grooves 14;

[0086] A limit stop block 5 is arranged at the lower end of the track groove 14.

[0087] Working principle:

[0088] When a large arc-shaped metal workpiece needs to be heated, first place the large arc-shaped metal workpiece on the roller rack, then place the electromagnetic induction heating tooling under the workpiece to be heated, and place the electromagnetic induction tooling close to the minimum radius of the workpiece to be heated. The tooling remains stationary, and the workpiece to be heated is heated while rolling. Since the preheating bracket has elasticity under the action of the tension spring, it can always ensure that the heating module is close to the workpiece to be heated, ensuring normal heating and good heating uniformity; even when the maximum radius of the workpiece to be heated turns to the electromagnetic induction heating tooling, the tension spring can disperse the pressure and will not cause the tooling to be damaged.

[0089] In addition to the above embodiments, the present invention also includes other embodiments. Any technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present invention.

Claims

1. A telescopic electromagnetic induction heating tooling for heating large arc-shaped metal workpieces, Characterized in that: It includes a support assembly (1), and a preheating assembly (2) is arranged on the support assembly (1); the support assembly (1) includes a base (11), and there are two left and right support frames (12) arranged on the base (11); the preheating assembly (2) includes a preheating bracket (21), the preheating bracket (21) is integrally arc-shaped, the preheating bracket (21) is arranged between the two left and right support frames (12), and a plurality of electromagnetic induction heating modules (22) are arranged on the preheating bracket (21) at intervals from front to back; The support frame (12) includes a front vertical support (121) and a rear vertical support (122), the height of the rear vertical support (122) is greater than that of the front vertical support (121), and a side support pipe (123) is arranged between the tops of the front vertical support (121) and the rear vertical support (122), the side support pipe (123) is arc-shaped, and a plurality of screws (16) are arranged on the side support pipe (123) at intervals; An inclined strut (124) is arranged between the middle of the side support pipe (123) and the rear vertical support (122), and a track groove (14) is arranged inside the inclined strut (124), and the track groove (14) is arranged along the radial direction of the side support pipe (123); The preheating bracket (21) includes two left and right middle side plates (211) arranged in parallel, peripheral side plates (212) are respectively arranged on the front and rear sides of the middle side plates (211), the peripheral side plates (212) are hinged to the middle side plates (211), a plurality of first card slots (213) are opened at the top of the middle side plates (211), a first fixing plate (214) is arranged on the inner side of the middle side plates (211) at the corresponding positions of the first card slots (213), a plurality of second card slots (215) are opened at the top of the peripheral side plates (212), a second fixing plate (216) is arranged on the inner side of the peripheral side plates (212) at the corresponding positions of the second card slots (215), and the electromagnetic induction heating module (22) is arranged between two corresponding first fixing plates (214) on the left and right or between two corresponding second fixing plates (216) on the left and right; A first long stud (6) is installed between the lower parts of two corresponding first fixing plates (214) on the left and right, and the left and right ends of the first long stud (6) are respectively connected to the screws (16) at the corresponding positions on the two left and right side support pipes (123) through first tension springs (3); a second long stud (7) is installed between the lower parts of two corresponding second fixing plates (216) on the left and right, and the left and right ends of the second long stud (7) are respectively connected to the screws (16) at the corresponding positions on the two left and right side support pipes (123) through second tension springs (4).

2. The telescopic electromagnetic induction heating tooling for heating large arc-shaped metal workpieces according to claim 1, Characterized in that: A first roller (217) is arranged on the upper part of the outer side of the first fixing plate (214), and the first roller (217) is placed in the first clamping groove (213). A second roller (218) is arranged on the upper part of the outer side of the second fixing plate (216), and the second roller (218) is placed in the second clamping groove (215).

3. The retractable electromagnetic induction heating tooling for heating large arc-shaped metal workpieces according to claim 1, characterized in that: A hinge hole (219) is arranged on one side of the peripheral side plate (212) close to the middle side plate (211), and the peripheral side plate (212) is hinged to the middle side plate (211) through a first hinge shaft (9); an arc-shaped guide groove (2110) is arranged below the hinge hole (219), a limit screw (10) is arranged in the arc-shaped guide groove (2110), and the limit screw (10) is connected to the middle side plate (211).

4. The retractable electromagnetic induction heating tooling for heating large arc-shaped metal workpieces according to claim 1, characterized in that: At least two guide wheels (8) are arranged on the outer side of the middle side plate (211) along the radial direction, and the guide wheels (8) are arranged in the track groove (14).

5. The retractable electromagnetic induction heating tooling for heating large arc-shaped metal workpieces according to claim 1, characterized in that: The electromagnetic induction heating module (22) includes a wiring groove plate (221), a plurality of wiring grooves (222) are arranged on the wiring groove plate (221) at intervals from left to right, metal wires are wound in the plurality of wiring grooves (222), and a wiring groove pressing plate (223) is arranged on the wiring groove plate (221).

Images