Anti-overcut satellite antenna reflecting surface shearing device

Abstract

The invention discloses an anti-overcut satellite antenna reflecting surface shearing device, and belongs to the technical field of cutting equipment. The device comprises a lathe bed module, a laser cutting module and a bottom preheating module, the bottom preheating module is arranged below a laser cutting head, a trumpet-shaped laser waste heat absorption opening of the preheating device is used for absorbing waste heat of cutting points on the back of a plate, and a blower device is matched with an air heating mechanism to conduct the waste heat to a conical preheating nozzle; the device is provided with a preheating module for preheating plates on a follow-up cutting route, the overcutting risk in the laser cutting process is effectively reduced, the device is further provided with a lifting material preparation module, automatic replacement of a multi-station plate cutting table board can be achieved, and the production efficiency is improved. The method is particularly suitable for machining precise curved surface components such as a satellite antenna reflecting surface, the quality of the cut edge can be remarkably improved, and the subsequent assembly flatness is guaranteed.

Description

Technical Field

[0001] The present invention is applicable to the technical field of cutting equipment and provides a shearing device for a satellite antenna reflector surface to prevent overcutting. Background Art

[0002] The reflecting surface of a satellite antenna is usually a smooth parabolic surface that is concave inward. During production, the metal sheet is usually cut into pieces according to the shape of the curved surface, and then several cut sheets are bent and spliced ​​into a parabolic satellite antenna reflecting surface. The sheet cutting is mostly carried out by laser cutting, but laser cutting is prone to heat accumulation during the continuous cutting process. Excessive energy density will pass through the hollow space and melt the other end face, eventually leading to overcutting, affecting the laser cutting quality. The smoothness of the satellite antenna reflecting surface directly affects its performance. Overcutting the cutting edge will affect the flatness of the subsequent assembly position, especially the bottom center position of the satellite antenna reflecting surface. The spliced ​​sheet is at an acute angle at the bottom center. During laser cutting, due to the large angle change at this point, it is easy to cause overcutting of the bending angle, affecting the final assembly effect. Summary of the Invention

[0003] To this end, the present invention provides a satellite antenna reflector surface shearing device that prevents overcutting. By arranging a bottom preheating module under the laser cutting module, during the laser cutting process, the bottom preheating module absorbs the residual heat from the cutting point on the back of the plate through the preheating device, and uses the residual heat combined with the air heating mechanism to preheat the plate on the subsequent cutting path, thereby reducing the risk of overcutting.

[0004] In order to achieve the above object, the present invention provides the following technical solution: a device for shearing a reflective surface of a satellite antenna to prevent overcutting, comprising:

[0005] The bed module includes a support base, wherein the support base is provided with a table sliding track, a cutting device longitudinal track and a preheating device longitudinal track;

[0006] The laser cutting module includes a longitudinal cutting drive device, a transverse cutting drive device, a cutting lifting drive device, a transverse cutting track, and a laser cutting head. The cutting lifting drive device is used to drive the laser cutting head to move up and down, the transverse cutting drive device is used to drive the cutting lifting drive device to move along the transverse cutting track, and the longitudinal cutting drive device is used to drive the transverse cutting track to move along the longitudinal track of the cutting device.

[0007] The bottom preheating module is arranged in the supporting base below the laser cutting head and comprises a preheating longitudinal driving device, a preheating transverse driving device, a preheating transverse track and a preheating device, the preheating transverse driving device is used to drive the preheating device to move along the preheating transverse track, the preheating longitudinal driving device is used to drive the preheating transverse track to move along the preheating device longitudinal track, and the preheating device comprises a blowing device, the air inlet of the blowing device is connected with the waste heat absorption pipeline, and the air outlet of the blowing device is connected with the plate preheating pipeline.

[0008] Further, the preheating device further comprises a servo rotating base, and the blowing device is fixedly connected with the rotating part of the servo rotating base.

[0009] Further, the waste heat absorption pipeline and the plate preheating pipeline are provided with air heating mechanisms.

[0010] Further, the waste heat absorption pipeline is provided with a horn-shaped laser waste heat absorption opening with gradually increased caliber at the opening away from the blowing device, and the plate preheating pipeline is provided with a tapered preheating spout with gradually reduced caliber at the opening away from the blowing device.

[0011] Further, the lifting and standby material module and the table surface transfer driving chain are further included, the lifting and standby material module comprises a standby material base and a table surface lifting device, the table surface lifting frame is movably arranged in the standby material base, the table surface lifting device is used to drive the table surface lifting frame to lift, a plurality of table surface installation tracks are arranged at intervals on the table surface lifting frame, the plate cutting table surface is slidably installed on the table surface installation tracks, one end of the table surface driving chain is arranged at the side of the supporting base, and the other end is arranged at the side of the standby material base, the table surface driving chain is provided with a table surface driving block, the plate cutting table surface is fixedly provided with a table surface driving groove matched with the table surface driving block at the side, and the table surface driving chain can drive the plate cutting table surface to reciprocatingly move between the table surface sliding tracks and the table surface installation tracks through the table surface driving block during rotation.

[0012] Further, the plate cutting table surface comprises a table surface frame body, the table surface frame body is provided with a sawtooth hollow plate mounting anvil, the table surface driving groove is arranged at one side of the table surface frame body, and a plurality of table surface supporting wheels are further arranged at the two sides of the table surface frame body.

[0013] Furthermore, there are two table lifting frames, and the two table lifting frames are respectively arranged on the left and right sides of the material preparation base. The table lifting device includes several eccentric wheel lifting mechanisms and a lifting drive motor. At least two eccentric wheel lifting mechanisms are respectively arranged on both sides of the material preparation base. The eccentric wheel lifting mechanism includes a lifting drive disk rotatably arranged on the material preparation base, and a lifting drive block is rotatably arranged on the lifting drive disk. The rotating shaft of the lifting drive block is eccentrically arranged with the rotating shaft of the lifting drive disk. The lifting drive block is slidingly abutted against the table lifting frame on this side, and the lifting drive motor is drivingly connected to the lifting drive disks of several eccentric wheel lifting mechanisms, and is used to synchronously drive the lifting drive disks of several eccentric wheel lifting mechanisms to rotate synchronously.

[0014] Furthermore, at least one lifting plate locking mechanism is provided on the left and right sides of the material preparation base respectively, and the lifting plate locking mechanism includes a locking shaft and an automatic lock, and the locking shaft is fixedly connected to the rotating shaft of one of the lifting drive plates on this side, and the automatic lock is provided with a locking tongue that can automatically retract and retract, and a plurality of locking slots adapted to the locking tongue are provided on the outside of the locking shaft.

[0015] Furthermore, the support base is provided with several table top positioning clamping devices, and the table top positioning clamping devices include a table top positioning block and a positioning block driving device. The positioning block driving device is used to drive the table top positioning block to move, and the table top frame is provided with several table top positioning slots that are adapted one by one to the table top positioning blocks.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. A bottom preheating module is set up to absorb the residual heat on the back of the plate at the cutting point and preheat the back of the plate on the subsequent cutting path to reduce the risk of overcutting. Specifically, the preheating device is controlled by a horizontal and vertical bidirectional drive mechanism to move synchronously with the laser head. The trumpet-shaped laser residual heat absorption port of the preheating device is always located below the laser head. The air blowing device absorbs the residual heat after the laser beam passes through the plate, and the conical preheating nozzle is used to preheat the plate on the subsequent cutting path to reduce the impact of overcutting.

[0018] 2. Multiple plate cutting tables can be set up at one time through the lifting and preparation module, so that material preparation can be carried out during the cutting process, which improves production efficiency and reduces the safety risks of loading and unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a device for shearing a reflective surface of a satellite antenna to prevent overcutting mentioned in the present invention;

[0020] Figure 2 This is a structural diagram of the bed module and the laser cutting module mentioned in the present invention;

[0021] Figure 3 For Figure 2 Structure diagram of the middle bed module and the bottom preheating module;

[0022] Figure 4 Structure diagram of the table positioning clamping device mentioned in the present application;

[0023] Figure 5 Structure diagram of the bottom preheating module mentioned in the present application;

[0024] Figure 6 For Figure 5 Structure diagram of the preheating device;

[0025] Figure 7 Structure diagram of the laser cutting module mentioned in the present application;

[0026] Figure 8 Structure diagram of the lifting material preparation module after assembling multiple plate cutting table surfaces;

[0027] Figure 9 For Figure 8 Local enlarged diagram of A;

[0028] Figure 10 Structure diagram of the internal structure of the lifting material preparation module mentioned in the present application

[0029] Figure 11 Structure diagram of the lifting disc locking mechanism mentioned in the present application;

[0030] Figure 12 Assembly structure diagram between the eccentric lifting mechanism and the table lifting frame mentioned in the present application;

[0031] Figure 13 Structure diagram of the plate cutting table surface.

[0032] In the figure:

[0033] 100, bed module, 110, support base, 120, table positioning clamping device, 121, table positioning clamping block, 122, positioning clamping block driving device, 130, table transfer driving chain, 131, table driving block, 140, cutting device longitudinal rail, 150, preheating device longitudinal rail, 160, table sliding rail;

[0034] 200, lifting material preparation module, 210, material preparation base, 220, table lifting frame, 230, lifting driving disc, 240, lifting driving block, 250, table lifting device, 260, lifting disc locking mechanism, 261, locking shaft, 262, automatic locking;

[0035] 300, laser cutting module, 310, longitudinal cutting drive device, 320, transverse cutting track, 330, transverse cutting drive device, 340, lifting cutting drive device, 350, laser cutting head;

[0036] 400, plate cutting table, 410, table frame, 420, sawtooth hollow plate mounting cutting board, 430, table support wheel, 440, table positioning slot, 450, table drive slot;

[0037] 500. Bottom preheating module, 510. Preheating longitudinal drive device, 520. Preheating transverse track, 530. Preheating transverse drive device, 540. Preheating device, 541. Blowing device, 542. Trumpet-shaped laser waste heat absorption port, 543. Conical preheating nozzle, 544. Servo rotating base. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0039] Embodiment, the present invention provides a device for preventing overcutting of a satellite antenna reflector surface. Figure 1 , Attachment Figure 2 The content includes a bed module 100, a laser cutting module 300, a bottom preheating module 500 and a lifting and preparing module 200. The laser cutting module 300 and the bottom preheating module 500 are installed in the bed module 100. The lifting and preparing module 200 is used to store multiple plate cutting tables 400. A table transfer drive chain 130 is set between the lifting and preparing module 200 and the bed module 100. The table transfer drive chain 130 can drive the plate cutting table 400 to reciprocate between the lifting and preparing module 200 and the bed module 100;

[0040] The following describes the solution of this embodiment in combination with the specific structure:

[0041] As attached Figure 3 As shown, the bed module 100 includes a support base 110, which is provided with a table sliding rail 160 for mounting and sliding the plate cutting table 400, a cutting device longitudinal rail 140 for supporting and longitudinally moving the laser cutting module 300, and a preheating device longitudinal rail 150 for supporting and longitudinally moving the bottom preheating module 500;

[0042] As attached Figure 7As shown, the laser cutting module 300 includes a longitudinal cutting drive device 310, a transverse cutting drive device 330, a lifting cutting drive device 340, a transverse cutting track 320 and a laser cutting head 350. The laser cutting head 350 can emit a high-energy laser beam for plate cutting. The lifting cutting drive device 340 is used to drive the laser cutting head 350 to move up and down. The transverse cutting drive device 330 is used to drive the lifting cutting drive device 340 to move along the transverse cutting track 320. The longitudinal cutting drive device 310 is used to drive the transverse cutting track 320 to move along the longitudinal cutting track 140. The lifting cutting drive device 340, the transverse cutting drive device 330 and the longitudinal cutting drive device 310 all adopt a servo motor in combination with a gear set transmission mechanism and a rack and pinion transmission mechanism to ensure the accuracy of displacement.

[0043] As attached Figure 5 As shown, the bottom preheating module 500 is arranged in the support base 110 and is located below the laser cutting head 350, including a preheating longitudinal drive device 510, a preheating transverse drive device 530, a preheating transverse track 520, a servo rotating base 544 and a preheating device 540. The preheating transverse drive device 530 is used to drive the preheating device 540 to move along the preheating transverse track 520, and the preheating longitudinal drive device 510 is used to drive the preheating transverse track 520 to move along the preheating device longitudinal track 150, as shown in the attached figure. Figure 6 As shown, the preheating device 540 includes a blast device 541 and a servo rotating base 544. The servo rotating base 544 is driven to move by the preheating transverse driving device 530. The blast device 541 is fixedly connected to the rotating part of the servo rotating base 544. The air inlet of the blast device 541 is connected to the waste heat absorption pipe. The air outlet of the blast device 541 is connected to the plate preheating pipe. The waste heat absorption pipe is opened away from the blast device 541 on one side and is provided with a trumpet-shaped laser waste heat absorption port 542 with a gradually increasing diameter. The plate preheating pipe is opened away from the blast device 541 on one side. There is a conical preheating nozzle 543 with a gradually decreasing diameter. At the same time, an air heating mechanism is provided in the waste heat absorption pipe and the plate preheating pipe. A waste heat absorption and discharge channel is constructed from the trumpet-shaped laser waste heat absorption port 542 to the conical preheating nozzle 543 through a blower. The trumpet-shaped laser waste heat absorption port 542 can expand the waste heat absorption range, and the conical preheating nozzle 543 can improve the concentration of the hot air flow when it is discharged. At the same time, an air heating mechanism such as a heating wire is used to perform secondary heating on the absorbed waste heat air flow, so that it can quickly preheat the plate part of the subsequent cutting line.

[0044] As attached Figure 8 , Attachment Figure 10As shown, the lifting material preparation module 200 is arranged on one side of the bed module 100, including a material preparation base 210 and a table lifting device 250. A table lifting frame 220 is movably arranged in the material preparation base 210. The number of the table lifting frames 220 is preferably two, and the two table lifting frames 220 are respectively arranged on the left and right sides of the material preparation base 210. The table lifting device 250 is used to drive the table lifting frame 220 to move up and down. The table lifting device 250 includes several eccentric wheel lifting mechanisms and a lifting drive motor. At least two eccentric wheel lifting mechanisms are respectively arranged on both sides of the material preparation base 210, as shown in the attached figure. Figure 12 As shown, the eccentric wheel lifting mechanism includes a lifting drive disk 230 rotatably arranged on the material preparation base 210, and a lifting drive block 240 is rotatably arranged on the lifting drive disk 230. The rotating shaft of the lifting drive block 240 is eccentrically arranged with the rotating shaft of the lifting drive disk 230, and the lifting drive block 240 slides and abuts against the table lifting frame 220 on this side. The lifting drive motor can be driven and connected with the lifting drive disks 230 of several eccentric wheel lifting mechanisms at the same time through the synchronous rod transmission mechanism and the synchronous belt transmission mechanism, so as to synchronously drive the lifting drive disks 230 of several eccentric wheel lifting mechanisms to rotate synchronously. The lifting drive block 240 can achieve height change as the lifting drive disk 230 rotates, and the lifting drive block 240 can drive the table lifting frame 220 to rise and fall during the height change process. The synchronous rotation of the lifting drive disks 230 of several eccentric wheel lifting mechanisms can realize the synchronous lifting of two table lifting frames 220. The table lifting frame 220 is provided with several table mounting rails at intervals above and below, and the plate cutting table 400 is slidably mounted on the table mounting rails, as shown in the attached figure. Figure 13 As shown, the plate cutting table 400 includes a table frame 410, a sawtooth hollow plate mounting cutting board 420 is provided in the table frame 410, a table driving groove 450 is provided on one side of the table frame 410, and a plurality of table support wheels 430 are provided on both sides of the table frame 410. Both sides of the plate cutting table 400 are respectively installed on the table mounting rails of two table lifting frames 220 through the table support wheels 430, one end of the table driving chain is provided on the side of the support base 110, and the other end is provided on the side of the material preparation base 210, as shown in the attached figure. Figure 9 As shown, the table drive chain is provided with a table drive block 131. During the operation of the table drive chain, the table drive block 131 will move accordingly. A table drive groove 450 adapted to the table drive block 131 is fixedly provided on the side of the plate cutting table 400. During the rotation of the table drive chain, the table drive block 131 can drive the plate cutting table 400 to move back and forth between the table sliding track 160 and the table mounting track. The specific operation is that the plate cutting table 400 to be transferred is lifted and lowered so that the table drive block 131 is inserted into the table drive groove 450 of the plate cutting table 400, and then the plate cutting table 400 is driven to move by the operation of the table drive chain.

[0045] In one embodiment, in order to ensure that the table lifting frame 220 is locked and fixed in the non-lifting stage, at least one lifting plate locking mechanism 260 is provided on the left and right sides of the material preparation base 210, as shown in the attached figure. Figure 11 As shown, the lifting plate locking mechanism 260 includes a locking shaft 261 and an automatic lock 262. The locking shaft 261 is fixedly connected to the rotating shaft of one of the lifting drive plates 230 on this side. The automatic lock 262 is provided with a locking tongue that can automatically retract and retract. A plurality of locking slots adapted to the locking tongue are provided on the outside of the locking shaft 261. In the non-lifting stage of the table lifting frame 220, the locking tongue is locked in the locking slot to achieve the locking of the lifting drive plate 230, thereby fixing the table lifting frame 220. The multiple locking slots correspond to different locking heights of the table lifting frame 220.

[0046] In one embodiment, in order to ensure the accuracy of the working position of the plate cutting table 400 on the bed module 100, a plurality of table positioning clamping devices 120 are provided on the support base 110, as shown in the attached Figure 4 As shown, the table positioning clamping device 120 includes a table positioning block 121 and a positioning block driving device 122. The positioning block driving device 122 generally adopts the form of a cylinder driving mechanism. The positioning block driving device 122 is used to drive the table positioning block 121 to move. The table frame 410 is provided with a number of table positioning slots 440 that are adapted to the table positioning blocks 121 one by one. When the plate cutting table 400 reaches the working position of the bed module 100, the table positioning block 121 is clamped into the table positioning slot 440 to achieve precise positioning.

[0047] The operating principle of this embodiment is as follows:

[0048] In the initial state, several plate cutting tables 400 are installed in sequence between several table mounting rails of two table lifting frames 220, and the plate to be cut is placed on the top plate cutting table 400. At this time, the table driving block 131 of the table driving chain is located near the plate cutting table 400, and the plate cutting table 400 is lifted and lowered by the table lifting frame 220, so that the table driving block 131 is inserted into the table driving slot 450 of the plate cutting table 400, and then the table driving chain is operated. , so that the table driving block 131 drives the plate cutting table 400 to move to the table sliding track 160 of the support base 110, and when it reaches the designated position, the table positioning block 121 is engaged with the table positioning slot 440 to realize positioning locking. At this time, the laser cutting module 300 can drive the laser cutting head 350 along the predetermined route through the cutting longitudinal drive device 310, the cutting transverse drive device 330, and the cutting lifting drive device 340. During the cutting operation, the bottom preheating module The preheating device 540 of 500 follows the position of the laser cutting head 350 through the preheating longitudinal drive device 510 and the preheating transverse drive device 530. During the cutting process, the horn-shaped laser waste heat absorption port 542 is always located below the laser cutting head 350, and the conical preheating nozzle 543 rotates in conjunction with the servo rotating base 544 to make it run along the position where cutting is required in the future, so as to preheat the position of the plate to be cut in the future. During the cutting process, the next plate cutting table 400 is used to place the plate to be cut, and the plate to be cut is placed on the next plate cutting table. After the plate cutting of a plate cutting table 400 is completed, the table driving block 131 drives the previous plate cutting table 400 to move back to the table mounting track of the material preparation base 210, and then the table lifting frame 220 is lifted to insert the table driving block 131 into the table driving slot 450 of the next plate cutting table 400, and then drive the next plate cutting table 400 to the bed module 100 for laser cutting. While cutting, the unloading and loading operations of the previous plate cutting table 400 can be completed, and this cycle is repeated.

[0049] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0050] The above are merely preferred embodiments of the present invention. Anyone skilled in the art may utilize the above-described technical solutions to modify the present invention or modify them into equivalent technical solutions. Therefore, any simple modification or equivalent replacement based on the technical solutions of the present invention falls within the scope of protection claimed by the present invention.

Claims

1. A device for preventing overcutting of a satellite antenna reflector surface, characterized in that: include: A bed module (100) comprises a support base (110), wherein the support base (110) is provided with a tabletop sliding track (160), a cutting device longitudinal track (140), and a preheating device longitudinal track (150); The laser cutting module (300) comprises a longitudinal cutting drive device (310), a transverse cutting drive device (330), a lifting cutting drive device (340), a transverse cutting track (320), and a laser cutting head (350), wherein the lifting cutting drive device (340) is used to drive the laser cutting head (350) to move up and down, the transverse cutting drive device (330) is used to drive the lifting cutting drive device (340) to move along the transverse cutting track (320), and the longitudinal cutting drive device (310) is used to drive the transverse cutting track (320) to move along the longitudinal cutting track (140). The bottom preheating module (500) is arranged in the support base (110) below the laser cutting head (350), and includes a preheating longitudinal drive device (510), a preheating transverse drive device (530), a preheating transverse track (520), and a preheating device (540), wherein the preheating transverse drive device (530) is used to drive the preheating device (540) to move along the preheating transverse track (520), and the preheating longitudinal drive device (510) is used to drive the preheating transverse track (520) to move along the preheating device longitudinal track (150). The preheating device (540) includes an air blowing device (541), an air inlet of the air blowing device (541) is connected to the waste heat absorption pipeline, and an air outlet of the air blowing device (541) is connected to the plate preheating pipeline.

2. The device for preventing overcutting of a satellite antenna reflector according to claim 1, characterized in that: The preheating device (540) further comprises a servo rotating base (544), and the air blowing device (541) is fixedly connected to the rotating part of the servo rotating base (544).

3. The device for preventing overcutting of a satellite antenna reflective surface according to claim 2, characterized in that: An air heating mechanism is provided in the waste heat absorption pipe and the plate preheating pipe.

4. The device for preventing overcutting of a satellite antenna reflective surface according to claim 3, characterized in that: The opening of the waste heat absorption pipe on one side away from the blasting device (541) is provided with a trumpet-shaped laser waste heat absorption port (542) with a gradually increasing diameter, and the opening of the plate preheating pipe on one side away from the blasting device (541) is provided with a conical preheating nozzle (543) with a gradually decreasing diameter.

5. The device for preventing overcutting of a satellite antenna reflective surface according to claim 4, characterized in that: The machine also includes a lifting material preparation module (200) and a table transfer drive chain (130). The lifting material preparation module (200) includes a material preparation base (210) and a table lifting device (250). A table lifting frame (220) is movably provided in the material preparation base (210). The table lifting device (250) is used to drive the table lifting frame (220) to move up and down. The table lifting frame (220) is provided with a plurality of table mounting rails at intervals above and below. The table mounting rails are slidably mounted with a plate cutting table (400). One end of the table drive chain is arranged on the side of the support base (110), and the other end is arranged on the side of the material preparation base (210). The table drive chain is provided with a table drive block (131). The side of the plate cutting table (400) is fixedly provided with a table drive groove (450) adapted to the table drive block (131). During the rotation of the table drive chain, the plate cutting table (400) can be driven by the table drive block (131) to move back and forth between the table sliding track (160) and the table mounting track.

6. The device for preventing overcutting of a satellite antenna reflective surface according to claim 5, characterized in that: The plate cutting table (400) comprises a table frame (410), a sawtooth hollow plate mounting cutting board (420) is provided in the table frame (410), the table driving groove (450) is provided on one side of the table frame (410), and a plurality of table support wheels (430) are respectively provided on both sides of the table frame (410).

7. The device for preventing overcutting of a satellite antenna reflective surface according to claim 6, characterized in that: There are two tabletop lifting frames (220), and the two tabletop lifting frames (220) are respectively arranged on the left and right sides of the material preparation base (210). The tabletop lifting device (250) includes several eccentric wheel lifting mechanisms and a lifting drive motor. At least two eccentric wheel lifting mechanisms are respectively arranged on both sides of the material preparation base (210). The eccentric wheel lifting mechanism includes a lifting drive disk (230) rotatably arranged on the material preparation base (210), and a lifting drive block (240) is rotatably arranged on the lifting drive disk (230). The rotating shaft of the lifting drive block (240) is eccentrically arranged with the rotating shaft of the lifting drive disk (230). The lifting drive block (240) is in sliding contact with the tabletop lifting frame (220) on this side. The lifting drive motor is drivingly connected to the lifting drive disks (230) of the several eccentric wheel lifting mechanisms, and is used to synchronously drive the lifting drive disks (230) of the several eccentric wheel lifting mechanisms to rotate synchronously.

8. The device for preventing overcutting of a satellite antenna reflective surface according to claim 7, characterized in that: At least one lifting plate locking mechanism (260) is respectively provided on the left and right sides of the material preparation base (210), and the lifting plate locking mechanism (260) includes a locking shaft (261) and an automatic lock (262), wherein the locking shaft (261) is fixedly connected to the rotating shaft of one of the lifting drive plates (230) on the side, and the automatic lock (262) is provided with a locking tongue that can automatically retract, and a plurality of locking slots adapted to the locking tongue are provided on the outer side of the locking shaft (261).

9. The device for preventing overcutting of a satellite antenna reflective surface according to claim 8, characterized in that: The support base (110) is provided with a plurality of tabletop positioning clamping devices (120), wherein the clamping devices of the tabletop positioning clamping devices (120) include a tabletop positioning clamping block (121) and a positioning clamping block driving device (122), wherein the positioning clamping block driving device (122) is used to drive the tabletop positioning clamping block (121) to move, and the tabletop frame (410) is provided with a plurality of tabletop positioning clamping slots (440) that are matched one by one with the tabletop positioning clamping blocks (121).

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