A press-fit device for electric drive rotor core

Abstract

This invention belongs to the field of automated assembly technology and discloses a pressing device for an electrically driven rotor core, comprising a frame; a horizontally placed conveying mechanism is fixed on the frame, and a rotor tray for carrying the rotor is placed on the conveying mechanism, which drives the rotor tray to move horizontally; a station rotation mechanism is provided on the frame, the station rotation mechanism includes a horizontally placed fixed platform, and multiple core trays are detachably connected to the upper end of the fixed platform. The multiple core trays are evenly distributed in a ring around the central axis of the fixed platform; a rotation drive unit connected to the fixed platform is provided on the frame, which drives the fixed platform to rotate around the central axis of the fixed platform; a heating mechanism is provided on the frame, the heating mechanism including a support rod fixed on the frame; the invention achieves the purpose of facilitating the hot pressing of the core and rotor, improving the automation level of the pressing of the core and rotor, improving the pressing efficiency, and reducing the danger during hot pressing.

Description

Technical Field

[0001] The invention belongs to the technical field of automated transfer and assembly, and in particular relates to a press-fitting device for an electric drive rotor core. Background Art

[0002] The demand for industrial automation in the development of modernization is becoming more and more urgent. With the increasing requirements for assembly technology, press-fitting is one of the most important processes in automated production. With the rapid development of new energy vehicles, the demand for automated press-fitting of the conductive rings of new energy motors has also increased. As an indispensable part of new energy motors, the rotor plays a vital role in the operation of the motor. Press-fitting of the iron core involves multiple processes. Manual press-fitting will increase labor costs, and manual labor cannot maintain a high yield rate. In particular, the press-fitting of the rotor core is generally an interference fit, and heating is generally required before press-fitting, and the press-fitting force is very large, which increases a certain risk for manual press-fitting; therefore, there is a problem in the prior art that it is not convenient to perform hot press-fitting of the iron core and the rotor. Summary of the invention

[0003] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a press-fitting device for an electric drive rotor core, which solves the problem in the prior art that it is inconvenient to perform hot press fitting of the core and the rotor.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A press-fitting device for an electric drive rotor core comprises a frame;

[0006] A horizontally placed conveying mechanism is fixed on the frame, a rotor tray for carrying the rotor is placed on the conveying mechanism, and the conveying mechanism is used to drive the rotor tray to move horizontally;

[0007] The frame is provided with a station rotation mechanism, which includes a horizontally placed fixed table, a plurality of core trays are detachably connected to the upper end of the fixed table, and the plurality of core trays are evenly distributed in a ring shape around the central axis of the fixed table, and a rotation drive unit connected to the fixed table is provided on the frame, and the rotation drive unit is used to drive the fixed table to rotate around the central axis of the fixed table;

[0008] A heating mechanism is provided on the frame, and the heating mechanism includes a support rod fixed on the frame, a heating head for heating the iron core is provided at one end of the support rod, and the heating head is located directly above any iron core tray, and a first telescopic cylinder placed vertically downward is fixed on the support rod, and an output end of the first telescopic cylinder is fixed to an upper end of the heating head;

[0009] The frame is provided with a press-fitting mechanism located above the conveying mechanism, the press-fitting mechanism comprises a servo press fixed on the frame, the servo press is placed vertically downward, a pressure head is fixed at the output end of the servo press, a connecting piece is fixed on the outer peripheral wall of the pressure head, a first clamping part is fixed on the connecting piece, and the first clamping part is used to clamp the iron core directly below the pressure head;

[0010] The frame is provided with a transfer mechanism, which is used to transfer the iron core heated by the heating mechanism to the bottom of the first clamping part;

[0011] The conveying mechanism includes a pair of symmetrically placed shafts, each of which is in the shape of a shell with a hollow interior and an open upper end, support feet are fixed at both ends of the lower end surface of the shaft, a pair of sprockets are rotatably connected inside the shaft, a conveying chain is meshed and connected between the two sprockets in any shaft, a first rotating shaft is rotatably connected between the two shafts, the sprockets at the corresponding ends of the shafts are fixedly sleeved on the first rotating shaft, a first rotating motor for driving the first rotating shaft to rotate is installed on any shaft, and a rotor tray is placed on the two conveying chains;

[0012] A pair of symmetrically placed first grooves are formed on the lower end surface of the rotor tray, and first protrusions matching the first grooves are fixed on the upper ends of the two conveyor chains, and the first protrusions are slidably inserted into the first grooves;

[0013] A plurality of second grooves are provided on the lower end surface of the rotor tray, a second telescopic cylinder placed vertically upward is fixed on the frame, the second telescopic cylinders are located between the two shafts, a support plate is fixed on the driving rod at the output end of the second telescopic cylinder, a plurality of second protrusions adapted to the second grooves are fixed on the support plate, the protrusions correspond to the second grooves one by one, the second protrusions are slidably connected to the corresponding second grooves, and when the driving rod at the output end of the second telescopic cylinder is contracted, the upper end surface of the second protrusion is lower than the lower end surface of the rotor tray;

[0014] The rotary drive unit includes a cam divider fixedly mounted on the frame, the cam divider output shaft is placed vertically upward, the cam divider is located below the fixed platform, the fixed platform is fixedly sleeved on the cam divider output shaft, and a plurality of core trays are evenly distributed in a ring shape around the central axis of the cam divider output shaft;

[0015] The first clamping part comprises a first clamping claw cylinder horizontally fixed on the connecting member, a pair of first clamping plates are connected to the first clamping claw cylinder, the two first clamping plates are symmetrically placed about the vertical plane where the central axis of the pressure head is located, and the first clamping claw cylinder is used to drive the two first clamping plates to move closer to or away from each other;

[0016] The transfer mechanism includes a first electric slide rail horizontally fixed on the frame, a first slider is slidably connected to the first electric slide rail, a second electric slide rail vertically placed downward is fixed to the first slider, a second slider is slidably connected to the second electric slide rail, a second clamping claw cylinder horizontally placed is fixed to the lower end of the second slider, a pair of second clamping plates horizontally symmetrically placed are provided on the second clamping claw cylinder, and the second clamping claw cylinder is located directly above any iron core tray adjacent to the iron core tray corresponding to the heating head;

[0017] The transfer mechanism also includes a base fixed on the frame, the base is located between the conveying mechanism and the workstation rotation mechanism, the base is installed with a second rotating motor, the output end of the second rotating motor is provided with a second rotating shaft placed vertically upward, and a fixed sleeve on the second rotating shaft is provided with a horizontally placed support bar, and the support bar can be rotated away from the second rotating shaft end to directly below the second clamping cylinder or the pressure head.

[0018] Beneficial effects of the present invention:

[0019] The iron core to be heated is placed on the iron core tray, and the rotating drive unit is turned on to drive the iron core tray with the iron core to be heated to rotate to just below the heating head. Preferably, the heating head can be an electric heating head, and the heating head is driven downward by the first telescopic cylinder to heat the iron core just below it. The heated iron core is rotated to the transfer mechanism, and the heated iron core is transported to just below the first clamping part by the transfer mechanism, and the iron core is clamped by the first clamping part. Then the servo press is turned on to drive the pressure head, the first clamping part and the iron core to move downward. After the iron core and the rotor are initially assembled, the first clamping part releases the clamping of the iron core, and the servo press continues to drive the pressure head downward, so as to facilitate the hot pressing of the iron core and the rotor, improve the degree of automation of the pressing of the iron core and the rotor, improve the pressing efficiency, and reduce the danger during hot pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall structure of the present invention from different viewing angles;

[0023] Figure 3 It is a partial structural schematic diagram of the conveying mechanism and the heating mechanism of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the press-fitting mechanism of the present invention;

[0025] Figure 5 It is a partial structural schematic diagram of the second telescopic cylinder of the present invention;

[0026] Figure 6 It is a partial structural schematic diagram of the first groove of the present invention;

[0027] Figure 7 It is a partial structural schematic diagram of the first electric slide rail of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the transfer mechanism of the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, a press-fitting device for an electric drive rotor core includes a frame 100;

[0031] A horizontally placed conveying mechanism 200 is fixed on the frame 100 , a rotor tray 300 for carrying a rotor is placed on the conveying mechanism 200 , and the conveying mechanism 200 is used to drive the rotor tray 300 to move horizontally;

[0032] The frame 100 is provided with a station rotating mechanism 400, which includes a horizontally placed fixed table 401, a plurality of core trays 402 are detachably connected to the upper end of the fixed table 401, and the plurality of core trays 402 are evenly distributed in a ring shape around the central axis of the fixed table 401. The frame 100 is provided with a rotating driving part connected to the fixed table 401, and the rotating driving part is used to drive the fixed table 401 to rotate around the central axis of the fixed table 401;

[0033] The frame 100 is provided with a heating mechanism 500, which includes a support rod 501 fixed on the frame 100, a heating head 502 for heating the iron core is provided at one end of the support rod 501, and the heating head 502 is located directly above any iron core tray 402, and a first telescopic cylinder 503 placed vertically downward is fixed on the support rod 501, and the output end of the first telescopic cylinder 503 is fixed to the upper end of the heating head 502;

[0034] The frame 100 is provided with a press mechanism 600 located above the conveying mechanism 200. The press mechanism 600 includes a servo press 601 fixed on the frame 100. The servo press 601 is placed vertically downward. A pressing head 602 is fixed to the output end of the servo press 601. A connecting piece 603 is fixed to the outer peripheral wall of the pressing head 602. A first clamping portion is fixed to the connecting piece 603. The first clamping portion is used to clamp the iron core directly below the pressing head 602.

[0035] The frame 100 is provided with a transfer mechanism 700, and the transfer mechanism 700 is used to transfer the iron core heated by the heating mechanism 500 to the bottom of the first clamping portion;

[0036] The worker places the rotor to be assembled on the rotor tray 300 , and transports the rotor tray 300 to the position directly below the pressing head 602 through the transport mechanism 200 ;

[0037] The iron core to be heated is placed on the iron core tray 402, and the rotating drive unit is turned on to drive the iron core tray 402 on which the iron core to be heated is placed to rotate to just below the heating head 502. Preferably, the heating head 502 can be an electric heating head 502, and the heating head 502 is driven downward by the first telescopic cylinder 503 to heat the iron core just below it. The heated iron core is rotated to the transfer mechanism 700, and the heated iron core is transported to just below the first clamping part by the transfer mechanism 700, and the iron core is clamped by the first clamping part, and then the servo press 601 is turned on to drive the pressure head 602, the first clamping part and the iron core to move downward. After the iron core and the rotor are initially assembled, the first clamping part releases the clamping of the iron core, and the servo press 601 continues to drive the pressure head 602 downward to complete the press-fitting of the iron core and the rotor, thereby improving the degree of automation of the press-fitting of the iron core and the rotor, improving the press-fitting efficiency, and reducing the danger generated during hot pressing.

[0038] The conveying mechanism 200 includes a pair of symmetrically placed shafts 201, each of which is in the shape of a shell with a hollow interior and an open upper end. Support feet 202 are fixed at both ends of the lower end surface of the shaft 201. A pair of sprockets are rotatably connected inside the shaft 201. A conveying chain 203 is meshed and connected between the two sprockets in any shaft 201. A first rotating shaft 204 is rotatably connected between the two shafts 201. The sprockets at the corresponding ends of the shaft 201 are fixedly sleeved on the first rotating shaft 204. A first rotating motor 205 for driving the first rotating shaft 204 to rotate is installed on any shaft 201. The rotor tray 300 is placed on the two conveying chains 203; by turning on the first rotating motor 205, the first rotating motor 205 drives the first rotating shaft 204, the sprockets, the conveying chain 203 and the rotor tray 300 in turn, so as to facilitate the conveying of the rotor tray 300 carrying the rotor to the position directly below the pressure head 602.

[0039] Preferably, the number of rotor trays 300 on the conveyor chain 203 can be set to two, and the rotation direction of the first rotating motor 205 driving the first rotation can be changed reciprocatingly and alternately, so that the two rotor trays 300 can be controlled to move alternately to the bottom of the pressing head 602, so that when one of the rotor trays 300 is being pressed, the rotor can be loaded and placed on the other rotor tray 300.

[0040] A pair of symmetrically placed first grooves 301 are provided on the lower end surface of the rotor tray 300, and first protrusions adapted to the first grooves 301 are fixed at the upper ends of the two conveying chains 203, and the first protrusions are slidably inserted into the first grooves 301; through the matching arrangement of the first protrusions and the first grooves 301, the stability of the rotor tray 300 during transportation on the conveying chain 203 is improved.

[0041] The lower end surface of the rotor tray 300 is provided with a plurality of second grooves 302, and a second telescopic cylinder 800 placed vertically upward is fixed on the frame 100, and the second telescopic cylinder 800 is located between the two shaft bars 201. A support plate is fixed on the driving rod at the output end of the second telescopic cylinder 800, and a plurality of second protrusions 801 adapted to the second grooves 302 are fixed on the support plate, and the protrusions correspond to the second grooves 302 one by one, and the second protrusions 801 are slidably connected with the corresponding second grooves 302, and when the driving rod at the output end of the second telescopic cylinder 800 is contracted, the second protrusions 801 The upper end surface is lower than the lower end surface of the rotor tray 300; when the rotor tray 300 is conveyed to the top of the second protrusion 801, the first rotating motor 205 is turned off, and the second telescopic cylinder 800 is turned on to drive the second protrusion 801 to move upward, so that the second protrusion 801 is inserted into the second groove 302. Through the matching arrangement of the second protrusion 801 and the second groove 302, the second telescopic cylinder 800 lifts the rotor tray 300 to separate from the conveying chain 203, so as to provide effective support for the rotor tray 300 during press-fitting, and at the same time avoid the pressure generated during press-fitting from damaging the conveying mechanism 200.

[0042] The rotating drive unit includes a cam divider 403 fixedly mounted on the frame 100, the output shaft of the cam divider 403 is placed vertically upward, the cam divider 403 is located below the fixed table 401, the fixed table 401 is fixedly sleeved on the output shaft of the cam divider 403, and a plurality of core trays 402 are evenly distributed in a ring shape around the central axis of the output shaft of the cam divider 403; through the setting of the cam divider 403, the fixed table 401 and the core tray 402 are driven to rotate, and at the same time, the cam divider 403 can accurately control the rotation angle of the fixed table 401 each time, so as to realize the intermittent rotation of the fixed table 401 and the core tray 402.

[0043] The first clamping part includes a first clamping cylinder 604 horizontally fixed on the connecting piece 603, and a pair of first clamping plates 605 are connected to the first clamping cylinder 604. The two first clamping plates 605 are symmetrically placed about the vertical plane where the central axis of the pressure head 602 is located. The first clamping cylinder 604 is used to drive the two first clamping plates 605 to move closer to or away from each other, so as to realize the clamping function of the first clamping part on the heated iron core.

[0044] The transfer mechanism 700 includes a first electric slide rail 701 horizontally fixed on the frame 100, a first slider 702 is slidably clamped on the first electric slide rail 701, a second electric slide rail 703 vertically placed downward is fixed on the first slider 702, a second slider 704 is slidably clamped on the second electric slide rail 703, a second clamping claw cylinder 705 horizontally placed is fixed at the lower end of the second slider 704, a pair of second clamping plates 706 horizontally symmetrically placed are provided on the second clamping claw cylinder 705, and the second clamping claw cylinder 705 is located directly above any core tray 402 adjacent to the core tray 402 corresponding to the heating head 502;

[0045] The transfer mechanism 700 further includes a base 707 fixed on the frame 100, the base 707 is located between the conveying mechanism 200 and the station rotating mechanism 400, the base 707 is installed with a second rotating motor 708, the output end of the second rotating motor 708 is provided with a second rotating shaft placed vertically upward, a horizontally placed support bar 709 is fixedly sleeved on the second rotating shaft, and the support bar 709 is away from the second rotating shaft end and can be rotated to the second clamping jaw cylinder 705 or directly below the pressure head 602;

[0046] When the heated iron core rotates to the bottom of the second clamping claw cylinder 705, the second electric slide rail 703 is turned on to drive the second slider 704 to move downward, and the second slider 704 drives the second clamping claw cylinder 705 and the second clamping plate 706 to move downward. Then, after the two second clamping plates 706 move downward to both sides of the iron core on the iron core tray 402, the second clamping claw cylinder 705 drives the two second clamping plates 706 to move closer to each other to clamp and fix the iron core.

[0047] Then, the second slider 704 is driven upward by the second electric slide rail 703, and the second rotating motor 708 is turned on to drive the support bar 709 to rotate to the bottom of the second clamping claw cylinder 705, and the two second clamping plates 706 release the clamping of the iron core and place it on the support bar 709; then, the second rotating motor 708 is turned on to drive the support bar 709 and the iron core to rotate to the bottom of the first clamping part, so as to realize the transportation and delivery of the iron core after the heating outside;

[0048] After the first clamping part completes clamping and fixing the iron core on the support bar 709, the second rotating motor 708 drives the support bar 709 to move out from between the pressure head 602 and the rotor on the rotor tray 300;

[0049] Preferably, when the core and the rotor do not need to be hot-pressed, multiple cores can be placed on any core tray 402, and when the multiple cores are rotated to the bottom of the second clamping jaw cylinder 705, they are arranged along the axis direction of the first electric slide rail 701; the first slider 702 can be driven to move by the first electric slide rail 701, so as to facilitate the sequential clamping of each core on the core tray 402;

[0050] Preferably, both the first electric slide rail 701 and the second electric slide rail 703 are provided with screw rods, the first slider 702 and the second slider 704 are threadedly mounted on the corresponding screw rods, and one end of the screw rods is connected to a driving motor to drive the first slider 702 and the second slider 704 to move.

[0051] Preferably, a slide is fixedly provided on the output end of the servo press 601, a pair of guide rails placed vertically downward are fixed on the frame 100, a third slider is slidably connected to the guide rails, the third slider is fixedly connected to the slide, a third telescopic cylinder placed vertically downward is fixed on the frame 100, and the output end of the third telescopic cylinder is fixed to the upper end of the slide; so as to improve the guiding performance of the pressure head 602 during the lifting and lowering process, and at the same time reduce the force on the servo press 601 when the pressure head 602 moves upward.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A press-fitting device for an electric drive rotor core, comprising a frame (100), characterized in that: A horizontally placed conveying mechanism (200) is fixed on the frame (100), a rotor tray (300) for carrying a rotor is placed on the conveying mechanism (200), and the conveying mechanism (200) is used to drive the rotor tray (300) to move horizontally; A workstation rotating mechanism (400) is provided on the frame (100), the workstation rotating mechanism (400) comprises a horizontally placed fixed platform (401), a plurality of core trays (402) are detachably connected to the upper end of the fixed platform (401), the plurality of core trays (402) are evenly distributed in a ring shape around the central axis of the fixed platform (401), and a rotating driving unit connected to the fixed platform (401) is provided on the frame (100), the rotating driving unit is used to drive the fixed platform (401) to rotate around the central axis of the fixed platform (401); A heating mechanism (500) is provided on the frame (100), and the heating mechanism (500) comprises a support rod (501) fixed on the frame (100), a heating head (502) for heating the iron core is provided at one end of the support rod (501), and the heating head (502) is located directly above any iron core tray (402), and a first telescopic cylinder (503) placed vertically downward is fixed on the support rod (501), and an output end of the first telescopic cylinder (503) is fixed to the upper end of the heating head (502); The frame (100) is provided with a press-fitting mechanism (600) located above the conveying mechanism (200), the press-fitting mechanism (600) comprising a servo press (601) fixed on the frame (100), the servo press (601) being placed vertically downward, a pressing head (602) being fixed at the output end of the servo press (601), a connecting piece (603) being fixed on the outer peripheral wall of the pressing head (602), a first clamping portion being fixed on the connecting piece (603), and the first clamping portion being used to clamp the iron core directly below the pressing head (602); A transfer mechanism (700) is provided on the frame (100), and the transfer mechanism (700) is used to transfer the iron core heated by the heating mechanism (500) to the position directly below the first clamping portion.

2. The press-fitting device for the electric drive rotor core according to claim 1, characterized in that: The conveying mechanism (200) comprises a pair of symmetrically placed shafts (201), each of the shafts (201) being in the shape of a shell having a hollow interior and an open upper end, support feet (202) being fixed at both ends of the lower end surface of the shafts (201), a pair of sprockets being rotatably connected inside the shafts (201), a conveying chain (203) being meshedly connected between the two sprockets in any shaft (201), a first rotating shaft (204) being rotatably connected between the two shafts (201), the sprockets at the corresponding ends of the shafts (201) being fixedly sleeved on the first rotating shaft (204), a first rotating motor (205) for driving the first rotating shaft (204) to rotate being installed on any shaft (201), and a rotor tray (300) being placed on the two conveying chains (203).

3. The press-fitting device for the electric drive rotor core according to claim 2, characterized in that: A pair of symmetrically placed first grooves (301) are formed on the lower end surface of the rotor tray (300), and first protrusions matching the first grooves (301) are fixed on the upper ends of the two conveying chains (203), and the first protrusions are slidably inserted into the first grooves (301).

4. The press-fitting device for the electric drive rotor core according to claim 3, characterized in that: The lower end surface of the rotor tray (300) is provided with a plurality of second grooves (302); a second telescopic cylinder (800) placed vertically upward is fixed on the frame (100); the second telescopic cylinder (800) is located between the two shafts (201); a support plate is fixed on the driving rod at the output end of the second telescopic cylinder (800); a plurality of second protrusions (801) adapted to the second grooves (302) are fixed on the support plate; the protrusions correspond to the second grooves (302) one by one; the second protrusions (801) are slidably connected to the corresponding second grooves (302); and when the driving rod at the output end of the second telescopic cylinder (800) is contracted, the upper end surface of the second protrusion (801) is lower than the lower end surface of the rotor tray (300).

5. The press-fitting device for the electric drive rotor core according to claim 4, characterized in that: The rotary drive unit comprises a cam divider (403) fixedly mounted on the frame (100); the output shaft of the cam divider (403) is placed vertically upward; the cam divider (403) is located below a fixed platform (401); the fixed platform (401) is fixedly sleeved on the output shaft of the cam divider (403); and a plurality of core trays (402) are evenly distributed in a ring shape around the central axis of the output shaft of the cam divider (403).

6. The press-fitting device for the electric drive rotor core according to claim 5, characterized in that: The first clamping part includes a first clamping cylinder (604) horizontally fixed on the connecting member (603), and a pair of first clamping plates (605) are connected to the first clamping cylinder (604). The two first clamping plates (605) are symmetrically placed about the vertical plane where the central axis of the pressure head (602) is located. The first clamping cylinder (604) is used to drive the two first clamping plates (605) to move closer to or away from each other.

7. The press-fitting device for the electric drive rotor core according to claim 6, characterized in that: The transfer mechanism (700) comprises a first electric slide rail (701) fixed horizontally on the frame (100), a first slider (702) slidably connected to the first electric slide rail (701), a second electric slide rail (703) placed vertically downward is fixed to the first slider (702), a second slider (704) slidably connected to the second electric slide rail (703), a second clamping claw cylinder (705) placed horizontally is fixed at the lower end of the second slider (704), a pair of second clamping plates (706) placed horizontally and symmetrically are provided on the second clamping claw cylinder (705), and the second clamping claw cylinder (705) is located directly above any iron core tray (402) adjacent to the iron core tray (402) corresponding to the heating head (502); The transfer mechanism (700) further comprises a base (707) fixed on the frame (100), the base (707) being located between the conveying mechanism (200) and the station rotating mechanism (400), the base (707) being provided with a second rotating motor (708), the output end of the second rotating motor (708) being provided with a second rotating shaft placed vertically upward, a fixed sleeve on the second rotating shaft being provided with a horizontally placed supporting bar (709), the supporting bar (709) being able to rotate away from the end of the second rotating shaft to directly below the second clamping jaw cylinder (705) or the pressure head (602).

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