Plate bending angle measuring device and method

Abstract

The invention provides a plate bending angle measuring device and method, and relates to the technical field of plate measurement, the plate bending angle measuring device comprises a fixing mechanism, a rotating mechanism and an angle measuring assembly; the fixing mechanism comprises a mounting seat and a first connecting rod; the mounting seat is fixed on the first plate unit; one end of the first connecting rod is connected with the mounting seat; the other end of the first connecting rod exceeds the edge of the mounting seat; the rotating mechanism comprises a supporting platform and a second connecting rod; one end of the second connecting rod is connected with the supporting platform; the other end of the second connecting rod exceeds the edge of the supporting platform and is rotationally connected with the first connecting rod; the supporting platform is used for being in contact with the second plate unit; the angle measuring assembly is used for detecting the rotation angle of the second connecting rod relative to the first connecting rod. The plate bending angle measuring device can adapt to bending angle measurement of plates with different bending angles, so that the universality of the plate bending angle measuring device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plate measurement, and in particular to a device and method for measuring the bending angle of a plate. Background Art

[0002] At present, when steel truss structures adapt to the road line shape, they need to be precisely bent at the node plate or web position to ensure that the structure can smoothly adapt to the curved or oblique road layout. This bending process, also known as "replacing the curve with a straight line", is an important technical requirement in bridge engineering.

[0003] In the prior art, the traditional method for measuring the bending angle of a plate is mainly to perform detection by making a special pallet mold. However, the inventors found that different molds need to be made for different angles, resulting in low utilization of the molds. Summary of the invention

[0004] The problem solved by the present invention is how to improve the versatility of a device for measuring the bending angle of a plate.

[0005] In the first aspect, the present invention provides a plate bending angle measuring device, wherein the plate comprises a first plate unit and a second plate unit arranged at an angle to each other, and the plate bending angle measuring device comprises a fixing mechanism, a rotating mechanism and an angle measuring assembly; the fixing mechanism comprises a mounting seat and a first connecting rod; the mounting seat is used to be fixed to the first plate unit; one end of the first connecting rod is connected to the mounting seat; the other end of the first connecting rod exceeds the edge of the mounting seat; the rotating mechanism comprises a supporting platform and a second connecting rod; one end of the second connecting rod is connected to the supporting platform; the other end of the second connecting rod exceeds the edge of the supporting platform and is rotatably connected to the first connecting rod; the support platform is used to contact the second plate unit; the angle measuring assembly is used to detect the rotation angle of the second connecting rod relative to the first connecting rod.

[0006] Optionally, the first plate unit is made of magnetic material; the fixing mechanism further includes an electromagnetic component, and the electromagnetic component is disposed on the mounting seat; the mounting seat adsorbs the first plate unit through the magnetic component.

[0007] Optionally, a slotted structure is provided at one end of the first connecting rod away from the mounting seat; the second connecting rod is rotatably disposed on the slotted structure at one end away from the support platform, and both end surfaces of the second connecting rod in the direction of the rotation axis are respectively in contact with the inner wall of the slotted structure.

[0008] Optionally, the mounting seat is provided with a first end surface, the first connecting rod extends beyond the edge of the mounting seat from the first end surface, and an extending direction of the first connecting rod is perpendicular to the first end surface.

[0009] Optionally, the cross-sectional area of ​​the support platform gradually decreases in a direction from an end of the support platform connected to the second connecting rod to an end away from the connecting rod.

[0010] Optionally, an end surface of the support platform away from the second connecting rod is a planar structure.

[0011] Optionally, the angle measuring assembly includes an angle measuring instrument and a first angle sensor and a second angle sensor both electrically connected to the angle measuring instrument; the first angle sensor is arranged on the first connecting rod, the second angle sensor is arranged on the second connecting rod, and the angle measuring instrument is installed on the first connecting rod or the second connecting rod.

[0012] In a second aspect, the present invention provides a plate bending angle measurement method, which is applied to the plate bending angle measurement device as described above, and the plate bending angle measurement method comprises the following steps:

[0013] Determine the fixed position of the mounting seat of the plate bending angle measuring device on the first plate unit of the plate according to the bending line of the bent plate;

[0014] Fixing the mounting base to a fixed position of the first plate unit;

[0015] Rotating the rotating mechanism of the bending angle measuring assembly until the supporting platform of the rotating mechanism contacts the second plate unit of the plate;

[0016] When the flatness of the plate body where the second plate unit contacts the support platform is not within a preset range, adjusting the fixed position of the mounting base on the first plate unit until the flatness is within the preset range, and fixing the mounting base again;

[0017] When the flatness is within the preset range, the rotation angle of the second connecting rod relative to the first connecting rod of the bending angle measuring assembly is obtained through the angle measuring assembly of the bending angle measuring assembly.

[0018] Optionally, determining the fixed position of the mounting seat of the plate bending angle measuring device on the first plate unit of the plate according to the bending line of the bent plate comprises:

[0019] Marking a bending line of the plate after bending;

[0020] The position of the mounting seat on the first plate unit is adjusted until the vertical distances from the two end points of the lower end of the first plane of the mounting seat to the bending line are equal.

[0021] Optionally, adjusting the fixing position of the mounting base on the first plate unit until the flatness is within a preset range, and fixing the mounting base again comprises:

[0022] Release the fixed connection between the mounting seat and the first plate unit;

[0023] Move the mounting seat on the first plate unit, and keep the vertical distances from the two end points of the lower end of the first plane of the mounting seat to the bending line equal;

[0024] After the flatness is within the preset range, the mounting base is fixed to the first plate unit again.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] In the structure of the plate bending angle measuring device, the mounting seat of the fixing mechanism can be used to fix the first plate unit of the bent plate; one end of the first connecting rod of the fixing mechanism is connected to the mounting seat; the other end of the first connecting rod exceeds the edge of the mounting seat; one end of the second connecting rod of the rotating mechanism is connected to the support platform; the other end of the second connecting rod exceeds the edge of the support platform and is rotatably connected to the first connecting rod to realize the rotation of the support platform, thereby adapting to plates with different bending angles; the support platform is used to contact the second plate unit to play a supporting role; the angle measuring component is used to detect the rotation angle of the second connecting rod relative to the first connecting rod. In this way, when the plate bending angle measuring device is used, the mounting seat is first fixed to the first plate unit, and then the rotating mechanism is rotated until the support platform contacts the second plate unit, and when the flatness of the second plate unit here is within the preset range, the rotation angle of the second connecting rod relative to the first connecting rod is obtained by the angle measuring component. In summary, the plate bending angle measuring device can adapt to the bending angle measurement of plates with different bending angles, thereby improving the versatility of the plate bending angle measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a diagram showing the use status of the plate bending angle measuring device according to an embodiment of the present invention;

[0028] Figure 2 It is a structural schematic diagram of a plate bending angle measuring device according to an embodiment of the present invention;

[0029] Figure 3 is a structural schematic diagram of a fixing mechanism according to an embodiment of the present invention;

[0030] Figure 4 A connection diagram of an angle measurement assembly according to an embodiment of the present invention;

[0031] Figure 5Schematic diagram of the process of the plate bending angle measurement method according to an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 100, first plate unit; 200, second plate unit; 300, plate bending angle measuring device; 301, fixing mechanism; 3011, mounting seat; 3012, first connecting rod; 3013, slotting structure; 302, rotating mechanism; 3021, supporting platform; 3022, second connecting rod; 303, angle measuring assembly; 3031, angle measuring instrument; 3032, first angle sensor; 3033, second angle sensor. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0035] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0036] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0037] The embodiment of the present invention provides a plate bending angle measuring device 300, wherein the plate comprises a first plate unit 100 and a second plate unit 200 arranged at an angle to each other, and the plate bending angle measuring device 300 comprises a fixing mechanism 301, a rotating mechanism 302 and an angle measuring assembly 303; the fixing mechanism 301 comprises a mounting seat 3011 and a first connecting rod 3012; the mounting seat 3011 is used to be fixed to the first plate unit 100; one end of the first connecting rod 3012 is connected to the mounting seat 3011; the first connecting rod 301 2 exceeds the edge of the mounting base 3011; the rotating mechanism 302 includes a supporting platform 3021 and a second connecting rod 3022; one end of the second connecting rod 3022 is connected to the supporting platform 3021; ​​the other end of the second connecting rod 3022 exceeds the edge of the supporting platform 3021 and is rotatably connected to the first connecting rod 3012; the supporting platform 3021 is used to contact the second plate unit 200; the angle measuring component 303 is used to detect the rotation angle of the second connecting rod 3022 relative to the first connecting rod 3012.

[0038] Specifically, the plate bending angle measuring device 300 of this embodiment is mainly used to detect the bending angle of a single bent plate. Figure 1 , 2 As shown, the fixing mechanism 301 includes a mounting seat 3011 and a first connecting rod 3012; the mounting seat 3011 is used to be fixed to the first plate unit 100, and its shape can be square, trapezoidal or other shapes, which are not limited here and are determined according to actual needs; one end of the first connecting rod 3012 is connected to the mounting seat 3011, and the connection method between the two includes but is not limited to integral manufacturing, screw connection or plug-in, etc.; the other end of the first connecting rod 3012 exceeds the edge of the mounting seat 3011, and the length of the exceeding distance ranges from 10cm to 15cm; the rotating mechanism 302 includes a supporting platform 3021 and a second connecting rod 3022; the first connecting rod 3022 is connected to the first connecting rod 3012; the first connecting rod 301 ... One end of the second connecting rod 3022 is connected to the supporting platform 3021, and the connection method between the two includes but is not limited to integral manufacturing, screw connection or plug-in, etc.; the other end of the second connecting rod 3022 extends beyond the edge of the supporting platform 3021 and is rotatably connected to the first connecting rod 3012, and the length of the extending distance ranges from 10cm to 15cm; the supporting platform 3021 is used to contact the second plate unit 200, and its shape can be square, trapezoidal or other shapes, which is not limited here and depends on actual needs; the angle measurement component 303 is used to detect the rotation angle of the second connecting rod 3022 relative to the first connecting rod 3012.

[0039] In this embodiment, in the structure of the plate bending angle measuring device 300, the mounting seat 3011 of the fixing mechanism 301 can be used to fix the first plate unit 100 of the bent plate; one end of the first connecting rod 3012 of the fixing mechanism 301 is connected to the mounting seat 3011; the other end of the first connecting rod 3012 exceeds the edge of the mounting seat 3011; one end of the second connecting rod 3022 of the rotating mechanism 302 is connected to the supporting platform 3021; ​​the other end of the second connecting rod 3022 exceeds the edge of the supporting platform 3021 and is rotatably connected to the first connecting rod 3012 to realize the rotation of the supporting platform 3021, thereby adapting to plates with different bending angles; the supporting platform 3021 is used to contact the second plate unit 200 to play a supporting role; the angle measuring component 303 is used to detect the rotation angle of the second connecting rod 3022 relative to the first connecting rod 3012. Thus, when the plate bending angle measuring device 300 is used, the mounting seat 3011 is first fixed to the first plate unit 100, and then the rotating mechanism 302 is rotated until the supporting platform 3021 contacts the second plate unit 200, and when the flatness of the second plate unit 200 here is within a preset range, the rotation angle of the second connecting rod 3022 relative to the first connecting rod 3012 is obtained through the angle measuring component 303. In summary, the plate bending angle measuring device 300 can adapt to the bending angle measurement of plates with different bending angles, thereby improving the versatility of the plate bending angle measuring device 300.

[0040] Optionally, the first plate unit 100 is made of magnetic material; the fixing mechanism 301 further includes an electromagnetic component, which is disposed on the mounting seat 3011; and the mounting seat 3011 adsorbs the first plate unit 100 through the magnetic component.

[0041] Specifically, the first plate unit 100 is made of magnetic material, such as steel or iron. In one embodiment, the fixing mechanism 301 further includes an electromagnetic component, which is disposed on the mounting seat 3011. The electromagnetic component can be embedded in the lower end surface of the mounting seat 3011 or located inside the mounting seat 3011. When the electromagnetic component is located inside the mounting seat 3011, the mounting seat 3011 needs to be made of a magnetic conductive material.

[0042] In this optional embodiment, when the mounting base 3011 needs to be fixed to the first board unit 100, the mounting base 3011 is first moved to the fixed position of the first board unit 100, and then the electromagnetic component is energized, at which time the electromagnetic component generates magnetic force to adsorb the board. With this design, there is no need to set a fixing structure, such as a fixing hole, on the first board unit 100, thereby reducing damage to the first board unit 100.

[0043] In other embodiments, the fixing mechanism 301 further includes a negative pressure suction cup and an air pump, and the negative pressure suction cup is disposed on the mounting seat 3011 and connected to the air pump. Thus, when the negative pressure suction cup contacts the first plate unit 100, the air pump is started, and the air pump discharges the air at the connection between the negative pressure suction cup and the first plate unit 100, thereby causing negative pressure to be formed at the connection between the negative pressure suction cup and the first plate unit 100, so as to achieve the fixation of the two.

[0044] Optionally, a slotted structure 3013 is provided at one end of the first connecting rod 3012 away from the mounting seat 3011; the second connecting rod 3022 is rotatably disposed on the slotted structure 3013 at one end away from the supporting platform 3021, and the two end surfaces of the second connecting rod 3022 in the direction of the rotation axis are respectively in contact with the inner wall of the slotted structure 3013.

[0045] Specifically, Figure 3 As shown, the end of the first connecting rod 3012 away from the mounting seat 3011 is provided with a slotted structure 3013, and the slotted structure 3013 here can be regarded as a double-ear plate structure; the end of the second connecting rod 3022 away from the supporting platform 3021 is rotatably set on the slotted structure 3013. In one embodiment, the end of the second connecting rod 3022 away from the supporting platform 3021 is provided with a first through hole along the direction of the rotation axis of the second connecting rod 3022, and the end of the first connecting rod 3012 away from the mounting seat 3011 is provided with a second through hole connected to the slotted structure 3013 along the rotation axis of the second connecting rod 3022. The rotating shaft passes through the first through hole and the second through hole to rotatably connect the first connecting rod 3012 and the second connecting rod 3022, and the two end surfaces of the second connecting rod 3022 located in the direction of its own rotation axis are respectively in contact with the inner wall of the slotted structure 3013.

[0046] In this optional embodiment, during the rotation of the rotating mechanism 302, the first connecting rod 3012 rotates at the slotted structure 3013. Since the two end surfaces of the second connecting rod 3022 in the direction of the rotation axis are respectively in contact with the inner walls of the slotted structure 3013, the displacement of the second connecting rod 3022 along its own rotation axis is limited, thereby reducing the probability of the second connecting rod 3022 being offset and resulting in poor detection accuracy.

[0047] Optionally, the mounting seat 3011 is provided with a first end surface, the first connecting rod 3012 extends beyond the edge of the mounting seat 3011 from the first end surface, and the extension direction of the first connecting rod 3012 is perpendicular to the first end surface.

[0048] Specifically, Figure 2As shown, a first end face is provided at one end of the mounting seat 3011 facing the second plate unit 200. After the mounting seat 3011 is placed on the first plate unit 100, the first end face is perpendicular to the second plate unit 200. The first connecting rod 3012 extends beyond the edge of the mounting seat 3011 from the first end face, and the extension direction of the first connecting rod 3012 is perpendicular to the first end face.

[0049] In this optional embodiment, since the first connecting rod 3012 extends beyond the edge of the mounting seat 3011 from the first end face, the first end face faces the bending line α at the bending point of the first plate unit 100 and the second plate unit 200. Therefore, the first end face and the bending line α can be used as a reference for positioning the mounting seat 3011, thereby quickly positioning the mounting seat 3011.

[0050] Optionally, the cross-sectional area of ​​the support platform 3021 gradually decreases in a direction from an end of the support platform 3021 connected to the second connecting rod 3022 to an end away from the connecting rod.

[0051] Specifically, Figure 2 As shown, the overall shape of the support platform 3021 is a right-angled trapezoid; along the direction from one end of the support platform 3021 connected to the second connecting rod 3022 to the end away from the connecting rod, the cross-sectional area of ​​the support platform 3021 gradually decreases, that is, the support platform 3021 is a structure that is wide at one end and narrow at the other end.

[0052] In this optional embodiment, after the support platform 3021 is rotated into position, the narrower end face of the support platform 3021 contacts the second board unit 200. Since the contact area is relatively narrow, it is convenient to observe the gap between the narrower end face of the support platform 3021 and the second board unit 200, thereby judging the flatness of the second board unit 200 at this position.

[0053] Furthermore, the end surface of the support platform 3021 away from the second connecting rod 3022 is a planar structure, so as to facilitate cooperation with the second board unit 200 so as to observe the flatness of the second board unit 200 .

[0054] Optionally, the angle measuring component 303 includes an angle measuring instrument 3031 and a first angle sensor 3032 and a second angle sensor 3033 both electrically connected to the angle measuring instrument 3031; the first angle sensor 3032 is arranged on the first connecting rod 3012, the second angle sensor 3033 is arranged on the second connecting rod 3022, and the angle measuring instrument 3031 is installed on the first connecting rod 3012 or the second connecting rod 3022.

[0055] Specifically, Figure 4As shown, the angle measuring component 303 includes three parts, namely an angle measuring instrument 3031 and a first angle sensor 3032 and a second angle sensor 3033 both electrically connected to the angle measuring instrument 3031; the first angle sensor 3032 is arranged on the first connecting rod 3012, and the connection method between the two includes but is not limited to bonding, plugging or snapping; the second angle sensor 3033 is arranged on the second connecting rod 3022, and the connection method between the two includes but is not limited to bonding, plugging or snapping; the angle measuring instrument 3031 is installed on the first connecting rod 3012 or the second connecting rod 3022. In one embodiment, the second connecting rod 3022 is provided with a mounting platform at one end connected to the first connecting rod 3012, and the angle measuring instrument 3031 is installed on the mounting platform, and the connection method between the two includes but is not limited to bonding, snapping or snapping.

[0056] In this optional embodiment, during the rotation of the second connecting rod 3022 relative to the first connecting rod 3012, the first angle sensor 3032 and the second angle sensor 3033 respectively transmit signals to the angle measuring instrument 3031, and the angle measuring instrument 3031 obtains and displays the angle value through the signals transmitted by the first angle sensor 3032 and the second angle sensor 3033.

[0057] An embodiment of the present invention provides a plate bending angle measurement method, which is applied to the plate bending angle measurement device 300 as described above. Figure 5 As shown, the plate bending angle measurement method includes the following steps:

[0058] Determine the fixed position of the mounting seat 3011 of the plate bending angle measuring device 300 on the first plate unit 100 of the plate according to the bending line α of the bent plate;

[0059] Fix the mounting base 3011 to a fixed position of the first board unit 100;

[0060] Rotate the rotating mechanism 302 of the bending angle measuring assembly 303 until the supporting platform 3021 of the rotating mechanism 302 contacts the second plate unit 200 of the plate;

[0061] When the flatness of the plate body of the second plate unit 200 in contact with the supporting platform 3021 is not within the preset range, the fixing position of the mounting seat 3011 on the first plate unit 100 is adjusted until the flatness is within the preset range, and the mounting seat 3011 is fixed again;

[0062] When the flatness is within the preset range, the angle of rotation of the second connecting rod 3022 relative to the first connecting rod 3012 of the bending angle measuring assembly 303 is obtained by the angle measuring assembly 303 of the bending angle measuring assembly 303 .

[0063] In this embodiment, the plate bending angle measurement method is based on the bending line α of the plate, so that the first connecting rod 3012 and the second connecting rod 3022 are located on the normal plane β of the bending line α, thereby reducing the probability of large angle measurement errors caused by the offset of the measuring plane, and improving accuracy.

[0064] Optionally, determining the fixed position of the mounting seat 3011 of the plate bending angle measuring device 300 on the first plate unit 100 of the plate according to the bending line α of the bent plate includes:

[0065] Mark the bending line α of the bent plate;

[0066] The position of the mounting seat 3011 on the first plate unit 100 is adjusted until the vertical distances from the two end points of the lower end of the first plane of the mounting seat 3011 to the bending line α are equal.

[0067] In this embodiment, after the two end points of the lower end of the first plane of the mounting base 3011 are adjusted to be equal to the vertical distance from the bending line α, the plane where the first connecting rod 3012 and the second connecting rod 3022 are located can be regarded as the normal plane β of the bending line α. In this way, the fixed position of the mounting base 3011 in the first plate unit 100 of the plate can be quickly identified.

[0068] Optionally, adjusting the fixing position of the mounting base 3011 on the first board unit 100 until the flatness is within a preset range, and fixing the mounting base 3011 again comprises:

[0069] Release the fixed connection between the mounting seat 3011 and the first plate unit 100;

[0070] Move the mounting seat 3011 on the first plate unit 100, and keep the vertical distances from the two end points of the lower end of the first plane of the mounting seat 3011 to the bending line α equal;

[0071] After the flatness is within the preset range, the mounting base 3011 is fixed to the first board unit 100 again.

[0072] In this embodiment, when adjusting the fixed position of the mounting base 3011 in the first plate unit 100, the vertical distances from the two end points of the lower end of the first plane of the mounting base 3011 to the bending line α are always equal, so the plane where the first connecting rod 3012 and the second connecting rod 3022 are located is always perpendicular to the bending line α, thereby reducing the subsequent alignment process and improving the installation efficiency.

[0073] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A device for measuring the bending angle of a plate, the plate comprising a first plate unit (100) and a second plate unit (200) arranged at an angle to each other, characterized in that: The plate bending angle measuring device comprises a fixing mechanism (301), a rotating mechanism (302) and an angle measuring assembly (303); the fixing mechanism (301) comprises a mounting seat (3011) and a first connecting rod (3012); the mounting seat (3011) is used to be fixed to the first plate unit (100); one end of the first connecting rod (3012) is connected to the mounting seat (3011); the other end of the first connecting rod (3012) exceeds the edge of the mounting seat (3011); the rotating mechanism (302) comprises a supporting member (3011) and a first connecting rod (3012); the first connecting rod (3012) is connected to the first plate unit (100); the first connecting rod (3012) is connected to the first plate unit (100); the second ... A supporting platform (3021) and a second connecting rod (3022); one end of the second connecting rod (3022) is connected to the supporting platform (3021); the other end of the second connecting rod (3022) extends beyond the edge of the supporting platform (3021) and is rotatably connected to the first connecting rod (3012); the supporting platform (3021) is used to contact the second plate unit (200); the angle measuring component (303) is used to detect the rotation angle of the second connecting rod (3022) relative to the first connecting rod (3012).

2. The plate bending angle measuring device according to claim 1, characterized in that: The first plate unit (100) is made of magnetic material; the fixing mechanism (301) further comprises an electromagnetic component, and the electromagnetic component is arranged on the mounting seat (3011); the mounting seat (3011) adsorbs the first plate unit (100) via the magnetic component.

3. The plate bending angle measuring device according to claim 1, characterized in that: A slotted structure (3013) is provided at one end of the first connecting rod (3012) away from the mounting seat (3011); an end of the second connecting rod (3022) away from the supporting platform (3021) is rotatably disposed on the slotted structure (3013), and both end surfaces of the second connecting rod (3022) in the direction of the rotation axis are respectively in contact with the inner wall of the slotted structure (3013).

4. The plate bending angle measuring device according to claim 1, characterized in that: The mounting seat (3011) is provided with a first end surface, the first connecting rod (3012) extends beyond the edge of the mounting seat (3011) from the first end surface, and the extension direction of the first connecting rod (3012) is perpendicular to the first end surface.

5. The plate bending angle measuring device according to claim 1, characterized in that: In a direction from one end of the support platform (3021) connected to the second connecting rod (3022) to one end away from the connecting rod, the cross-sectional area of ​​the support platform (3021) gradually decreases.

6. The plate bending angle measuring device according to claim 5, characterized in that: The end surface of the supporting platform (3021) away from the second connecting rod (3022) is a planar structure.

7. The plate bending angle measuring device according to claim 1, characterized in that: The angle measuring component (303) comprises an angle measuring instrument (3031) and a first angle sensor (3032) and a second angle sensor (3033) both electrically connected to the angle measuring instrument (3031); the first angle sensor (3032) is arranged on the first connecting rod (3012), the second angle sensor (3033) is arranged on the second connecting rod (3022), and the angle measuring instrument (3031) is installed on the first connecting rod (3012) or the second connecting rod (3022).

8. A plate bending angle measuring method, applied to the plate bending angle measuring device according to any one of claims 1 to 7, characterized in that: The plate bending angle measurement method comprises the following steps: Determining the fixed position of the mounting seat (3011) of the plate bending angle measuring device on the first plate unit (100) of the plate according to the bending line of the bent plate; Fixing the mounting seat (3011) at a fixed position of the first plate unit (100); Rotating the rotating mechanism (302) of the bending angle measuring assembly (303) until the supporting platform (3021) of the rotating mechanism (302) contacts the second plate unit (200) of the plate; When the flatness of the plate body of the second plate unit (200) in contact with the supporting platform (3021) is not within a preset range, adjusting the fixed position of the mounting seat (3011) on the first plate unit (100) until the flatness is within the preset range, and fixing the mounting seat (3011) again; When the flatness is within the preset range, the rotation angle of the second connecting rod (3022) relative to the first connecting rod (3012) of the bending angle measuring assembly (303) is obtained by the angle measuring assembly (303) of the bending angle measuring assembly (303).

9. The plate bending angle measurement method according to claim 8, characterized in that: The method of determining the fixed position of the mounting seat (3011) of the plate bending angle measuring device on the first plate unit (100) of the plate according to the bending line of the bent plate comprises: Marking a bending line of the plate after bending; The position of the mounting seat (3011) on the first plate unit (100) is adjusted until the vertical distances from the two end points of the lower end of the first plane of the mounting seat (3011) to the bending line are equal.

10. The plate bending angle measurement method according to claim 8, characterized in that: The step of adjusting the fixing position of the mounting seat (3011) on the first plate unit (100) until the flatness is within a preset range, and fixing the mounting seat (3011) again comprises: releasing the fixed connection between the mounting seat (3011) and the first plate unit (100); Moving the mounting seat (3011) on the first plate unit (100), and maintaining the vertical distances from two end points of the lower end of the first plane of the mounting seat (3011) to the bending line to be equal; After the flatness is within the preset range, the mounting seat (3011) is fixed to the first plate unit (100) again.

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