CN211362941U - Rotary workbench and bridge cutting machine - Google Patents

Abstract

The utility model relates to the technical field of sheet metal processing, in particular to a rotary table and a bridge cutting machine. On the connection base, the second rotating base is rotatably connected to the first rotating base; the first rotating base is provided with a first rotating mechanism, the second rotating base is provided with a second rotating mechanism, and the first rotating base is provided with a second rotating mechanism. A rotating mechanism drives the second rotating base to rotate, and the second rotating mechanism drives the base to rotate; the utility model drives the second rotating base to rotate through the first rotating mechanism, the second rotating mechanism drives the base to rotate, and can be adjusted in two stages. Realize thickness adjustment; or after the worktable is placed on the plate with the pedestal, one rotating mechanism is used to adjust the angle correction of the plate placement, and the other rotating mechanism is used to adjust the angle during cutting to ensure the accuracy of the finished product; and it can simplify Cutting head structure.

Description

A rotary table and bridge cutting machine

technical field

The utility model relates to the technical field of sheet metal processing, in particular to a rotary table and a bridge cutting machine.

Background technique

The traditional bridge cutting machine mainly includes two side beams, a cross beam erected on the two side beams so as to be movable in the longitudinal direction, a movable seat installed on the cross beam so as to be movable in the lateral direction, and a lifter installed on the movable seat so as to be movable in the vertical direction. frame, the tool holder arranged at the lower end of the lifting frame, the main motor arranged on the lifting frame and connected to drive the rotation of the saw blade in the tool holder, the stone workbench arranged under the tool holder, and the longitudinal movement arranged between the side beam and the cross beam A mechanism, a lateral moving mechanism arranged between the moving base and the beam, a vertical moving mechanism arranged between the moving base and the lifting frame, and a control device respectively connected with each moving mechanism and the main motor. When this type of bridge-type stone cutter is used for stone cutting, since the worktable is a fixed worktable, the plate needs to be manually hoisted and placed on the worktable, and then the stone is processed by controlling the movement of the tool rest along the trajectory, while the manual swinging The accuracy of the placed plates depends on manual experience, and the work efficiency is relatively low. The accuracy of stone processing is also easily affected. At the same time, due to manual layout, the loss of stone is inevitably relatively large.

Utility model content

The technical problem to be solved by the utility model is to provide a worktable capable of rotating and turning over and a bridge cutting machine using the worktable.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a rotary table includes a base, a first rotary base, a second rotary base and a pedestal which are arranged in sequence from bottom to top, and the first rotary base rotates on the connection base, the second rotating base is rotatably connected to the first rotating base;

The first rotating base is provided with a first rotating mechanism, the second rotating base is provided with a second rotating mechanism, the first rotating mechanism drives the second rotating base to rotate, and the second rotating mechanism drives the pedestal to rotate .

The beneficial effect of the utility model is that: the second rotating base is driven to rotate by the first rotating mechanism, and the second rotating mechanism drives the base to rotate, which can be adjusted in two stages to realize coarse adjustment or fine adjustment; After the belt is placed on the pedestal, one of the rotating mechanisms is used to adjust the angle correction of the plate placement, and the other rotating mechanism is used to adjust the angle during cutting, so that the two rotating mechanisms will not interfere with each other and ensure the accuracy of the finished product; and The double rotation mechanism can make the cutting head of the worktable do not need to rotate, that is, no additional rotating shaft is needed, and the structure of the cutting head is simplified. cutting accuracy.

Description of drawings

1 is a schematic structural diagram of a bridge cutting machine according to a specific embodiment of the present utility model;

2 is a schematic structural diagram of a rotary table according to a specific embodiment of the present invention;

3 is a first angle view of an exploded view of a rotary table according to a specific embodiment of the present invention;

4 is a second angle view of an exploded view of a rotary table according to a specific embodiment of the present invention;

5 is a cross-sectional view of a rotary table according to a specific embodiment of the present invention;

Numeral description: 1. Base; 2. First rotating seat; 21. First rotating mechanism; 3. Second rotating seat; 31. Second rotating mechanism; 32. Limit assembly; 4. Base; 41, Limit block 411, connecting part; 412, friction part; 413, reinforcing rib; 42, fixed plate; 43, rotating shaft; 431, limit groove; 432, limit piece; 44, flexible support bar; 45, rigid support bar; 5. Lifting part; 6. Ring part; 7. Roller support seat; 8. Rotating fixing part; 81. Seat body; 82. Bearing; 9. Side beam; 10. Beam; 11. Cutting head; 12. Vision Identification device; 13. Elastic pad.

Detailed ways

In order to describe in detail the technical content, achieved objects and effects of the present invention, the following descriptions are given with reference to the embodiments and the accompanying drawings.

Please refer to FIGS. 1 to 5 , a rotary table includes a base 1 , a first rotating base 2 , a second rotating base 3 and a pedestal 4 arranged in sequence from bottom to top, and the first rotating base 2 is rotatably connected to the base 1, the second rotating base 3 is rotatably connected to the first rotating base 2;

The first rotating base 2 is provided with a first rotating mechanism 21, the second rotating base 3 is provided with a second rotating mechanism 31, the first rotating mechanism 21 drives the second rotating base 3 to rotate, and the first rotating mechanism 21 drives the second rotating base 3 to rotate. The two rotating mechanisms 31 drive the pedestal 4 to rotate.

It can be seen from the above description that the second rotating base 3 is driven to rotate by the first rotating mechanism 21, and the second rotating mechanism 31 drives the base 4 to rotate, which can be adjusted in two stages to realize coarse adjustment or fine adjustment; After placing the belt pedestal 4, one of the rotating mechanisms is used to adjust the angle correction of the plate placement, and the other rotating mechanism is used to adjust the angle during cutting, so that the two rotating mechanisms will not interfere with each other and ensure the accuracy of the finished product. ; And the setting of the double rotation mechanism can make the cutting head 11 of the worktable do not need to rotate, that is, no additional rotating shaft is required, the structure of the cutting head 11 is simplified, and the cutting head 11 will not be caused by vibration. , to further improve the cutting accuracy of the product.

Further, the second rotating base 3 is provided with a limiting assembly 32 , and the lower surface of the base 4 is fixedly provided with a fixing plate 42 cooperating with the second rotating mechanism 31 and a limiting block 41 cooperating with the limiting assembly 32 . .

As can be seen from the above description, through the limiting assembly 32 and the limiting block 41, when the first rotating mechanism 21 drives the second rotating base 3, the limiting assembly 32 and the limiting block 41 can cooperate with each other to realize the second rotating base 3 and the second rotating base 3 at the same time. The pedestals 4 are fixed to each other, so that the first rotating mechanism 21 can drive the pedestal 4 to rotate independently.

Further, a fixed plate 42 is disposed on the lower surface of the base 4 , and the second rotating mechanism 31 includes a second rotating motor, and the second rotating motor drives the fixed plate 42 to rotate.

Further, the second rotating mechanism 31 also includes a precision reducer.

It can be seen from the above description that the use of the precision reducer can ensure the accuracy of the adjustment of the second rotating mechanism 31 .

Further, a rotating shaft 43 is fixedly arranged on the lower surface of the base 4 , and the first rotating base 2 and the second rotating base 3 are respectively provided with through holes for the rotating shaft 43 to pass through. Rotating fixing members 8 are respectively provided;

The rotating shaft 43 is rotatably fixed to the first rotating base 2 and the second rotating base 3 through the rotating fixing member 8 .

Further, the rotating fixing member 8 includes a seat body 81 and a plurality of bearings 82 arranged in the seat body 81, the seat body 81 is fixed on the through hole, and the bearing 82 is sleeved on the rotating shaft 43;

A limiting slot 431 is provided on the portion of the rotating shaft 43 extending out of the through hole of the first rotating base 2 , and a limiting member 432 is arranged on the limiting slot 431 , which is matched with the limiting slot 431 . When 431 cooperates with the limiting member 432 , the limiting member 432 abuts against the rotating fixing member 8 of the first rotating base 2 .

It can be seen from the above description that the arrangement of the bearing 82 can ensure that the first rotating mechanism 21 and the second rotating mechanism 31 can drive the rotation of the pedestal 4 and play a limiting role, ensure the speed and accuracy of the rotation, and reduce noise and rotational speed. friction force.

Further, the limit assembly 32 includes a limit reciprocating member, a friction block and a connecting seat, the connecting seat is fixedly connected to the second rotating seat 3, and the limit reciprocating member is arranged on the connecting seat to drive the friction block to do so. Reciprocating motion.

It can be seen from the above description that when the second rotating base 3 is driven to rotate by the first rotating mechanism 21 , the limiting block 41 cooperates with the friction block.

Further, the limiting block 41 includes a connecting portion 411 and a friction portion 412, the connecting portion 411 is connected to the lower surface of the base 4, the friction portion 412 is connected to the connecting portion 411, and the friction portion 412 It includes a first surface matched with the friction block and a second surface opposite to the first surface, the second surface is provided with a reinforcing rib 413 connected with the connecting portion 411 , and the first surface is arc-shaped.

As can be seen from the above description, the arrangement of the reinforcing ribs 413 can ensure the connection strength of the connecting portion 411 and the friction portion 412, and avoid excessive deformation caused by the long-term stress of the friction portion 412, thereby failing to meet the friction requirements.

Further, the first rotating mechanism 21 includes a rotating hydraulic rod, one end of the rotating hydraulic rod is rotatably fixed on the first rotating base 2 , and the other end is rotatably fixed on the second rotating base 3 .

Further, the first rotating mechanism 21 includes a first rotating power source, and the first rotating power source is an electric motor or a hydraulic motor; the first rotating power source is fixed on the first rotating base 2, and the first rotating power source is The rotating power source drives the second rotating base 3 to rotate.

Further, between the first rotating base 2 and the second rotating base 3 and between the second rotating base 3 and the pedestal 4 are matching spaces, and the matching spaces are provided with matching components;

The matching assembly includes a ring member 6 and a plurality of roller support seats 7 corresponding to the ring member 6 . The ring member 6 is provided at the top of the matching space, and the roller support seat 7 is provided at the bottom of the matching space.

It can be seen from the above description that the arrangement of the roller support base 7 and the ring member 6 can ensure the rotational stability among the first rotating base 2 , the second rotating base 3 and the pedestal 4 .

Further, the first rotating base 2 includes a flip side, and the flip side is hinged to the base 1;

The workbench also includes a jacking piece 5, one end of the jacking piece 5 is rotatably connected to the base 1, and the other end is rotatably connected to the swivel base;

The upper surface of the base 1 is provided with a plurality of elastic pads 13 , and the lower surface of the first rotating base 2 is provided with elastic pads 13 opposite to the elastic pads 13 .

It can be seen from the above description that the setting of the lifting member 5 makes the pedestal 4 and the second rotating base 3 turn over at an angle between 0° and 90°, which is convenient for the placement and reclaiming of the plate, and can pass through the first rotating base 2 And the second rotating base 3 rotates the plate in the horizontal direction, so that it can meet the different cutting directions of the workbench, saving labor; the setting of the elastic pad 13 can ensure the stability of the workbench and avoid rigid collisions. damage or damage to the workbench.

Further, the pedestal 4 includes a surface layer and a support layer, the support layer is a layer facing the swivel base, and the surface layer includes a plurality of flexible support bars 44 arranged in parallel;

The support layer includes a plurality of rigid support bars 45, and the plurality of the rigid support bars 45 form a grid.

It can be seen from the above description that the arrangement of the flexible support bars 44 can evenly absorb the weight of the board and avoid excessive local stress. The rigid support bars 45 are used to form a grid-like support layer, which can ensure the light weight and the structure at the same time. strength, reducing power consumption.

A bridge cutting machine, including the above-mentioned rotary table, the bridge cutting machine also includes two side beams 9, a cross beam 10 erected on the two side beams 9 in a longitudinally movable manner, and a transverse beam 10 which can be moved along the lateral direction. The movable seat is installed on the beam 10 and the cutting head 11 is installed on the movable seat to move in the vertical direction.

As can be seen from the above description, by only moving the cutting head 11 in the vertical direction, during the cutting process, the torque generated by the reaction force of the saw blade can be prevented from being directly transmitted to the rotating shaft of the traditional rotary cutting head 11, thereby avoiding causing the cutting machine The slight shaking of the head 11 makes the cutting gap smaller, which in turn makes the machining accuracy higher, the product cutting gap is larger, and the machining consumption is small, and at the same time, it also avoids the reaction force from affecting the stability and service life of the cutting motor.

Further, the bridge cutting machine also includes a control device and a visual recognition device 12 for collecting plate information. The visual recognition device 12 is connected to the side beam 9 and is arranged above the workbench; the visual recognition device 12 is connected to The control device is electrically connected.

Example 1

A rotary table, comprising a base, a first rotary base, a second rotary base and a pedestal arranged in sequence from bottom to top, the first rotary base is rotatably connected to the base, and the second rotary base is rotatably connected to the first rotary base. on the rotating seat;

The first rotating base is provided with a first rotating mechanism, the second rotating base is provided with a second rotating mechanism, the first rotating mechanism drives the second rotating base to rotate, and the second rotating mechanism drives the pedestal to rotate .

The second rotating base is provided with a limiting component, and a lower surface of the pedestal is fixedly provided with a fixing plate cooperating with the second rotating mechanism and a limiting block cooperating with the limiting component.

A fixed plate is arranged on the lower surface of the pedestal, and the fixed plate is a gear plate. The second rotating mechanism includes a second rotating motor and a second output gear, and the second rotating motor is driven and fixed by the second output gear. disc turns.

The second rotating mechanism also includes a precision reducer.

A rotating shaft is fixedly arranged on the lower surface of the pedestal, the first rotating base and the second rotating base are respectively provided with through holes for the rotating shafts to pass through, and a rotating fixing member is respectively arranged in the through holes;

The rotating shaft is rotatably fixed with the first rotating base and the second rotating base through the rotating fixing member.

The rotating fixing piece includes a seat body and two bearings arranged in the seat body, the seat body is fixed on the through hole, and the bearings are sleeved on the rotating shaft;

A limit slot is provided on the part of the rotating shaft extending out of the through hole of the first rotating seat, and a limit piece that cooperates with the limit slot is arranged on the limit slot. When the limit slot is matched with the limit piece , the limiting piece is in contact with the rotating fixing piece of the first rotating seat.

The limit assembly includes a limit reciprocating member, a friction block and a connecting seat, the connecting seat is fixedly connected to the second rotating seat, and the limit reciprocating member is arranged on the connecting seat to drive the friction block to reciprocate.

The limiting block includes a connection part and a friction part, the connection part is connected to the lower surface of the pedestal, the friction part is connected to the connection part, and the friction part includes a first surface matched with the friction block and a friction part. The second surface opposite to the first surface is provided with a reinforcing rib connected with the connecting portion, and the first surface is arc-shaped.

The first rotating mechanism includes a first rotating power source, and the first rotating power source is a motor; the first rotating power source is fixed on the first rotating seat, and the first rotating power source drives the second rotating power source. The swivel base rotates.

A matching space is formed between the first rotating seat and the second rotating seat and between the second rotating seat and the pedestal, and the matching space is provided with a matching component;

The matching assembly includes a ring member and a plurality of roller support seats corresponding to the ring members, the ring member is provided at the top of the matching space, and the roller support seat is positioned at the bottom of the matching space.

The first rotating seat includes a flip side, and the flip side is hinged with the base;

The workbench further comprises a jacking piece, one end of the jacking piece is rotatably connected to the base, and the other end is rotatably connected to the swivel base;

The upper surface of the base is provided with a plurality of elastic pads, and the lower surface of the first rotating seat is provided with elastic pads opposite to the elastic pads.

The pedestal includes a surface layer and a support layer, the support layer is a layer facing the swivel base, and the surface layer includes a plurality of flexible support bars arranged in parallel;

The support layer includes a plurality of rigid support bars, and the plurality of the rigid support bars form a grid.

Embodiment 2

A rotary table, comprising a base, a first rotary base, a second rotary base and a pedestal arranged in sequence from bottom to top, the first rotary base is rotatably connected to the base, and the second rotary base is rotatably connected to the first rotary base. on the rotating seat;

The first rotating base is provided with a first rotating mechanism, the second rotating base is provided with a second rotating mechanism, the first rotating mechanism drives the second rotating base to rotate, and the second rotating mechanism drives the pedestal to rotate .

The second rotating base is provided with a limiting component, and a lower surface of the pedestal is fixedly provided with a fixing plate cooperating with the second rotating mechanism and a limiting block cooperating with the limiting component.

A fixed plate is arranged on the lower surface of the pedestal, and the fixed plate is a gear plate. The second rotating mechanism includes a second rotating motor and a second output gear, and the second rotating motor is driven and fixed by the second output gear. disc turns.

The second rotating mechanism also includes a precision reducer.

A rotating shaft is fixedly arranged on the lower surface of the pedestal, the first rotating base and the second rotating base are respectively provided with through holes for the rotating shafts to pass through, and a rotating fixing member is respectively arranged in the through holes;

The rotating shaft is rotatably fixed with the first rotating base and the second rotating base through the rotating fixing member.

The rotating fixing piece includes a seat body and two bearings arranged in the seat body, the seat body is fixed on the through hole, and the bearings are sleeved on the rotating shaft;

A limit slot is provided on the part of the rotating shaft extending out of the through hole of the first rotating seat, and a limit piece that cooperates with the limit slot is arranged on the limit slot. When the limit slot is matched with the limit piece , the limiting piece is in contact with the rotating fixing piece of the first rotating seat.

The limit assembly includes a limit reciprocating member, a friction block and a connecting seat, the connecting seat is fixedly connected to the second rotating seat, and the limit reciprocating member is arranged on the connecting seat to drive the friction block to reciprocate.

The limiting block includes a connection part and a friction part, the connection part is connected to the lower surface of the pedestal, the friction part is connected to the connection part, and the friction part includes a first surface matched with the friction block and a friction part. The second surface opposite to the first surface is provided with a reinforcing rib connected with the connecting portion, and the first surface is arc-shaped.

The first rotating mechanism includes a rotating hydraulic rod, one end of the rotating hydraulic rod is rotatably fixed on the first rotating seat, and the other end is rotatably fixed on the second rotating seat.

A matching space is formed between the first rotating seat and the second rotating seat and between the second rotating seat and the pedestal, and the matching space is provided with a matching component;

The matching assembly includes a ring member and a plurality of roller support seats corresponding to the ring members, the ring member is provided at the top of the matching space, and the roller support seat is positioned at the bottom of the matching space.

The first rotating seat includes a flip side, and the flip side is hinged with the base;

The workbench further comprises a jacking piece, one end of the jacking piece is rotatably connected to the base, and the other end is rotatably connected to the swivel base;

The upper surface of the base is provided with a plurality of elastic pads, and the lower surface of the first rotating seat is provided with elastic pads opposite to the elastic pads.

The pedestal includes a surface layer and a support layer, the support layer is a layer facing the swivel base, and the surface layer includes a plurality of flexible support bars arranged in parallel;

The support layer includes a plurality of rigid support bars, and the plurality of the rigid support bars form a grid.

Embodiment 3

A rotary table, comprising a base, a first rotary base, a second rotary base and a pedestal arranged in sequence from bottom to top, the first rotary base is rotatably connected to the base, and the second rotary base is rotatably connected to the first rotary base. on the rotating seat;

The first rotating base is provided with a first rotating mechanism, the second rotating base is provided with a second rotating mechanism, the first rotating mechanism drives the second rotating base to rotate, and the second rotating mechanism drives the pedestal to rotate .

The second rotating base is provided with a limiting component, and a lower surface of the pedestal is fixedly provided with a fixing plate cooperating with the second rotating mechanism and a limiting block cooperating with the limiting component.

A fixed plate is arranged on the lower surface of the pedestal, and the fixed plate is a gear plate. The second rotating mechanism includes a second rotating motor and a second output gear, and the second rotating motor is driven and fixed by the second output gear. disc turns.

A rotating shaft is fixedly arranged on the lower surface of the pedestal, the first rotating base and the second rotating base are respectively provided with through holes for the rotating shafts to pass through, and a rotating fixing member is respectively arranged in the through holes;

The rotating shaft is rotatably fixed with the first rotating base and the second rotating base through the rotating fixing member.

The rotating fixing piece includes a seat body and two bearings arranged in the seat body, the seat body is fixed on the through hole, and the bearings are sleeved on the rotating shaft;

A limit slot is provided on the part of the rotating shaft extending out of the through hole of the first rotating seat, and a limit piece that cooperates with the limit slot is arranged on the limit slot. When the limit slot is matched with the limit piece , the limiting piece is in contact with the rotating fixing piece of the first rotating seat.

The limit assembly includes a limit reciprocating member, a friction block and a connecting seat, the connecting seat is fixedly connected to the second rotating seat, and the limit reciprocating member is arranged on the connecting seat to drive the friction block to reciprocate.

The limiting block includes a connection part and a friction part, the connection part is connected to the lower surface of the pedestal, the friction part is connected to the connection part, and the friction part includes a first surface matched with the friction block and a friction part. The second surface opposite to the first surface is provided with a reinforcing rib connected with the connecting portion, and the first surface is arc-shaped.

The first rotating mechanism includes a rotating hydraulic rod, one end of the rotating hydraulic rod is rotatably fixed on the first rotating seat, and the other end is rotatably fixed on the second rotating seat.

A matching space is formed between the first rotating seat and the second rotating seat and between the second rotating seat and the pedestal, and the matching space is provided with a matching component;

The matching assembly includes a ring member and a plurality of roller support seats corresponding to the ring members, the ring member is provided at the top of the matching space, and the roller support seat is positioned at the bottom of the matching space.

The first rotating seat includes a flip side, and the flip side is hinged with the base;

The workbench further comprises a jacking piece, one end of the jacking piece is rotatably connected to the base, and the other end is rotatably connected to the swivel base;

The upper surface of the base is provided with a plurality of elastic pads, and the lower surface of the first rotating seat is provided with elastic pads opposite to the elastic pads.

The pedestal includes a surface layer and a support layer, the support layer is a layer facing the swivel base, and the surface layer includes a plurality of flexible support bars arranged in parallel;

The support layer includes a plurality of rigid support bars, and the plurality of the rigid support bars form a grid.

Embodiment 4

A bridge cutting machine, comprising the workbench described in the first embodiment, the second embodiment or the third embodiment, and the bridge cutting machine further comprises two side beams, and the bridge cutting machine can be erected on the two side beams in a longitudinally movable manner. A beam, a movable seat arranged on the transverse beam movably along the transverse direction, and a cutting machine head arranged on the movable seat movably along the vertical direction.

The bridge cutting machine also includes a control device and a visual recognition device for collecting plate information, the visual recognition device is connected to the side beam and arranged above the rotary table; the visual recognition device is electrically connected with the control device, The control device includes a control system for receiving the information collected by the visual recognition device, analyzing and processing the collected information, and controlling the rotary table.

The above are only the embodiments of the present utility model, and are not intended to limit the scope of the present utility model patent. All equivalent transformations made by using the contents of the present utility model description and accompanying drawings, or directly or indirectly applied in related technical fields, are the same as The principles are included in the scope of patent protection of the present invention.

Claims (15)

1. A rotary table, characterized in that it comprises a base, a first rotary base, a second rotary base and a pedestal set in sequence from bottom to top, the first rotary base is rotatably connected to the base, and the second rotary base The seat is rotatably connected to the first rotating seat; The first rotating base is provided with a first rotating mechanism, the second rotating base is provided with a second rotating mechanism, the first rotating mechanism drives the second rotating base to rotate, and the second rotating mechanism drives the pedestal to rotate . 2 . The rotary workbench according to claim 1 , wherein a limit component is provided on the second rotary base, and a fixed plate for cooperating with the second rotary mechanism and a limiter are fixed on the lower surface of the base. 3 . The limit block that the assembly is matched with. 3 . The rotary table according to claim 2 , wherein a fixed disk is provided on the lower surface of the pedestal, the second rotating mechanism comprises a second rotating motor, and the second rotating motor drives the fixed disk. 4 . turn. 4. The rotary table according to claim 3, wherein the second rotary mechanism further comprises a precision reducer. 5 . The rotary table according to claim 2 , wherein a rotating shaft is fixedly arranged on the lower surface of the base, and the first rotating base and the second rotating base are respectively provided with a rotating shaft passing through. 6 . The through holes of the through holes are respectively provided with rotating fixing parts; The rotating shaft is rotatably fixed with the first rotating base and the second rotating base through the rotating fixing member. 6 . The rotary table according to claim 5 , wherein the rotary fixing member comprises a seat body and a plurality of bearings arranged in the seat body, the seat body is fixed on the through hole, and the bearings are sleeved on the rotary table. 7 . on the shaft; A limit slot is provided on the part of the rotating shaft extending out of the through hole of the first rotating seat, and a limit piece that cooperates with the limit slot is arranged on the limit slot. When the limit slot is matched with the limit piece , the limiting piece is in contact with the rotating fixing piece of the first rotating seat. 7 . The rotary table according to claim 2 , wherein the limit assembly comprises a limit reciprocating member, a friction block and a connecting seat, the connecting seat is fixedly connected to the second rotating seat, and the limit The reciprocating piece is arranged on the connecting seat to drive the friction block to reciprocate. 8 . The rotary table according to claim 2 , wherein the limiting block comprises a connecting portion and a friction portion, the connecting portion is connected to the lower surface of the base, and the friction portion is connected to the connecting portion. 9 . On the other hand, the friction part includes a first surface that cooperates with the friction block and a second surface opposite to the first surface, the second surface is provided with a reinforcing rib connected to the connecting part, and the first surface is arc-shaped . 9 . The rotary table according to claim 2 , wherein the first rotating mechanism comprises a rotating hydraulic rod, one end of the rotating hydraulic rod is rotatably fixed on the first rotating seat, and the other end is rotatably fixed on the first rotating seat. 10 . on the second rotating seat. 10 . The rotary table according to claim 2 , wherein the first rotary mechanism comprises a first rotary power source, and the first rotary power source is an electric motor or a hydraulic motor; the first rotary power source It is fixed on the first rotating base, and the first rotating power source drives the second rotating base to rotate. 11 . The rotary table according to claim 2 , wherein a matching space is formed between the first rotating seat and the second rotating seat and between the second rotating seat and the pedestal, and the matching space is provided with a matching space. 12 . component; The matching assembly includes a ring member and a plurality of roller support seats corresponding to the ring members, the ring member is provided at the top of the matching space, and the roller support seat is positioned at the bottom of the matching space. 12. The rotary table according to any one of claims 1-11, wherein the first rotary base comprises a flip side, and the flip side is hinged to the base; The workbench further comprises a jacking piece, one end of the jacking piece is rotatably connected to the base, and the other end is rotatably connected to the swivel base; The upper surface of the base is provided with a plurality of elastic pads, and the lower surface of the first rotating seat is provided with elastic pads opposite to the elastic pads. 13. The rotary table according to any one of claims 1-11, wherein the pedestal comprises a surface layer and a support layer, the support layer is a layer facing the rotary base, and the surface layer includes multiple layers. Flexible support bars arranged in parallel; The support layer includes a plurality of rigid support bars, and the plurality of the rigid support bars form a grid. 14. A bridge cutting machine, characterized in that it comprises the rotary table according to any one of claims 1-13, and the bridge cutting machine further comprises two side beams, which are erected on two sides movably along the longitudinal direction. A beam on the side beam, a movable seat arranged on the transverse beam movably along the transverse direction, and a cutting machine head arranged on the movable seat movably along the vertical direction. 15. The bridge cutting machine according to claim 14, characterized in that, the bridge cutting machine further comprises a control device and a visual recognition device for collecting plate information, the visual recognition device is connected to the side beam and arranged on the side beam. Above the workbench; the visual recognition device is electrically connected with the control device.

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