Metal plate surface flatness detection device

Abstract

The invention relates to the technical field of plate detection, in particular to a metal plate surface flatness detection device which comprises a workbench, a to-be-detected metal plate is placed on the upper surface of the workbench, and a detector body is arranged above the to-be-detected metal plate; a pressure-bearing block is fixed to the end of the strip-shaped toothed plate and is of a horizontally-placed right triangle structure. The extrusion plate extrudes the side face of one pressure bearing block and drives the strip-shaped toothed plate to correspond to and be meshed with the driving gear. The device has the beneficial effects that a driving gear is fixedly connected to the end part of a double-thread screw, a vertical plate is arranged on one side of the driving gear, and an extrusion plate is fixedly connected to the lower end of the vertical plate; the position of the detector body can be automatically changed in the width direction of the metal plate to be detected, and all positions of the surface of the metal plate to be detected can be comprehensively detected without additionally arranging power equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate detection, in particular to a metal plate surface flatness detection device. BACKGROUND

[0002] The plate surface flatness is a quality control process for quantitatively measuring and evaluating the deviation of the metal plate surface from an ideal absolute plane. In simple terms, it is to check whether a metal plate is "flat" or "warped", and to accurately measure how much it is "warped" and what type of "warped" it is.

[0003] In the prior art, the metal plate surface flatness detection device is disclosed in Chinese Utility Model No. CN218380942U. The roller rolls on the surface of the metal plate, and the displacement sensor detects the displacement change of the inner rod, so as to judge the flatness of the surface of the metal plate.

[0004] At present, in the use process of the traditional detection equipment, a single detector can only detect the flatness of the metal plate on a single straight line. The movement of the detector along the width direction of the metal plate needs to be driven by an additional power equipment, which leads to the complexity of the equipment volume and the entanglement between the cables of the power equipment, thereby affecting the use. Therefore, the present application provides a metal plate surface flatness detection device to solve the above problems. SUMMARY

[0005] The present application aims to provide a metal plate surface flatness detection device to solve the problem of additional power equipment required for the movement of the traditional detector along the width direction of the metal plate.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a metal plate surface flatness detection device, comprising: a workbench, the upper surface of the workbench is placed with a to-be-tested metal plate, a detector body is arranged above the to-be-tested metal plate, the detector body is fixedly installed at the lower end of a sliding block, a double-headed screw rod is horizontally arranged and movably penetrated through the lower end of the sliding block, a connecting block is movably sleeved on the outer side of both ends of the double-headed screw rod, the connecting block is slidably installed on a sliding guide rail below the connecting block, and an adjusting seat is fixedly arranged at both ends of the sliding guide rail; a strip-shaped tooth plate is slidably installed in the adjusting seat along the length direction of the double-headed screw rod, and the strip-shaped tooth plate is parallel to the sliding guide rail, a pressure block is fixedly arranged at the end of the strip-shaped tooth plate, and the pressure block is a horizontally arranged right-angled triangular structure; Both ends of the double-head screw are fixed with driving gears, the outer side of the driving gears is provided with vertical plates which are fixed relative to the connecting blocks, the lower end of the vertical plate is fixed with an extrusion plate, the extrusion plate extrudes the side of one pressure block and drives the strip-shaped toothed plate to correspond and engage with the driving gear.

[0007] Preferably, the pressure block is provided with two groups of two pressure blocks respectively located at both ends of the strip-shaped toothed plate, the two pressure blocks of one group are distributed in central symmetry around the center of the strip-shaped toothed plate, the extrusion plate extrudes the side of the other pressure block and drives the strip-shaped toothed plate to be horizontally misaligned with the driving gear.

[0008] Preferably, the tooth groove on the strip-shaped toothed plate is located on the upper surface of the strip-shaped toothed plate, the strip-shaped toothed plate is flush with the lower side edge of the driving gear, and the horizontal height of the upper surface of the pressure block is lower than the horizontal height of the tooth groove on the strip-shaped toothed plate.

[0009] Preferably, the extrusion plate is consistent in height with the pressure block, both ends of the extrusion plate are provided with round corners and form extrusion heads, and the middle part of the extrusion plate is rotatably installed with a shaft roller, and the diameter of the shaft roller is larger than the horizontal width of the extrusion plate.

[0010] Preferably, the inner cavity of the adjusting seat is fixedly installed with a base at the bottom, the upper surface of the base is fixedly installed with a mounting seat through bolts, the mounting seat is provided in an open upward "Fang" shape, two guide cross bars are fixedly arranged in the inner cavity of the mounting seat, and the lower surface of the strip-shaped toothed plate is fixedly installed with two sleeves which are movably sleeved on the outer side of the two guide cross bars.

[0011] Preferably, the outer side of both ends of the guide cross bar is sleeved with a reset spring, the two ends of the reset spring respectively abut against the end face of the sleeve and the inner side wall of the mounting seat, the reset spring is in a compressed state, the upper surface of the adjusting seat is provided with an avoiding groove, and the extrusion plate and the driving gear correspond to the avoiding groove.

[0012] Preferably, the upper side of the double-head screw is provided with a guide shaft which is parallel to the double-head screw, the two connecting blocks are fixed at both ends of the guide shaft, the outer side of the connecting block is fixed with a protective cover, the vertical plate and the driving gear are located in the inner cavity of the protective cover, and the upper end of the vertical plate is fixedly connected with the guide shaft, and the middle part of the vertical plate is movably sleeved on the outer side of the double-head screw.

[0013] Preferably, the lower end of the connecting block is fixedly connected with a sliding seat, the middle part of the sliding guide rail is provided with a sliding groove, and the upper side of the sliding groove has an opening, and the sliding seat is slidingly installed in the inner cavity of the sliding groove and is adapted thereto.

[0014] Preferably, the middle part of the sliding seat is connected with a driving screw through a threaded penetration, the two ends of the driving screw are movably penetrated into the inner walls of the two ends of the sliding groove through bearings, and one end of the sliding guide rail is provided with a positive and negative motor for driving the rotation of the driving screw.

[0015] Preferably, the upper end of the sliding block is movably sleeved on the outside of the guide shaft, the middle part of the double-headed screw and the middle part of the guide shaft are both fixedly provided with annular baffles, the sliding block is provided with two and is located on the two sides of the annular baffles, and the detector body is provided with two and is fixed to the lower ends of the two sliding blocks through mounting racks.

[0016] Compared with the prior art, the beneficial effects of the present application are: The present application has the beneficial effects that: When the double-headed screw moves along the length direction of the to-be-detected metal plate, the detector body can detect the to-be-detected metal plate, when the driving gear moves close to the strip-shaped toothed plate, the extrusion plate first extrudes the pressure block to make the strip-shaped toothed plate translate, at this time, the driving gear can mesh with the strip-shaped toothed plate, the driving gear drives the double-headed screw to rotate, so that the sliding block moves along the length direction of the double-headed screw, and in turn drives the detector body to move along the width direction of the to-be-detected metal plate, therefore, during the reciprocating movement of the detector body along the length direction of the to-be-detected metal plate, the detector body can automatically change the position along the width direction of the to-be-detected metal plate, without the need of additionally setting a power equipment, and the surface of the to-be-detected metal plate can be comprehensively detected. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the overall structure of the present application; Figure 2 It is an exploded view of the connecting block and the sliding guide rail structure of the present application; Figure 3 It is an installation view of the detector body structure of the present application; Figure 4 It is a view of the driving gear and the strip-shaped toothed plate structure of the present application; Figure 5 It is an exploded view of the strip-shaped toothed plate and the mounting seat structure of the present application; Figure 6 It is a perspective view of the extrusion plate structure of the present application; Figure 7 It is a top view of the overall structure of the present application; Figure 8It is a side view schematic diagram of the metal plate structure to be detected of the present application; Figure 9 It is a plane coordinate system schematic diagram established based on the detection result of the detector body of the present application; Figure 10 It is a space coordinate system schematic diagram established based on the detection result of the detector body of the present application.

[0018] In the figure: 1, workbench; 11, metal plate to be detected; 2, detector body; 21, mounting frame; 3, sliding block; 4, double-head screw rod; 41, driving gear; 42, annular baffle; 5, connecting block; 51, guide shaft; 52, sliding seat; 53, driving screw; 54, protective cover; 6, sliding guide rail; 61, sliding groove; 7, adjusting seat; 71, strip-shaped toothed plate; 711, pressure block; 712, sleeve; 72, mounting seat; 721, guide cross bar; 722, return spring; 73, base; 74, avoiding groove; 8, vertical plate; 81, extrusion plate; 82, extrusion head; 83, shaft roller. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme of the present application clear and complete, and the advantages more clear and obvious, the embodiments of the present application are further described in detail below in combination with the drawings. It should be understood that the specific embodiments described here are part of the embodiments of the present application, not all the embodiments, and are only used to explain the embodiments of the present application, and are not used to limit the embodiments of the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the scope of protection of the present application.

[0020] Please refer to Figures 1 to 10 The present application provides a technical scheme: Embodiment one, a metal plate surface flatness detection device, comprising: a workbench 1.

[0021] Specifically, the upper surface of the workbench 1 is placed with a to-be-tested metal plate 11, the upper side of the to-be-tested metal plate 11 is provided with a detector body 2, the detection end of the detector body 2 is vertically downward, used for detecting the distance between the surface of the to-be-tested metal plate 11, the lower end of the detector body 2 is fixedly installed on the sliding block 3, the lower end of the sliding block 3 is through-threaded with a horizontally placed double-headed screw rod 4, the double-headed screw rod 4 can rotate by itself, when the double-headed screw rod 4 rotates, it can drive the sliding block 3 to slide along the length direction of the double-headed screw rod 4 through the thread, and further drive the detector body 2 to adjust the position along the width direction of the to-be-tested metal plate 11, so that the detector body 2 can detect a larger area of the surface of the to-be-tested metal plate 11, the outer side of both ends of the double-headed screw rod 4 is movably sleeved with a connecting block 5, the connecting block 5 is slidably installed on the sliding guide rail 6 below it, the connecting block 5 can only slide along the length direction of the sliding guide rail 6, and further drive the double-headed screw rod 4 to move along the length direction of the to-be-tested metal plate 11, that is, when the connecting block 5 of the device moves along the length direction of the sliding guide rail 6, the double-headed screw rod 4, the sliding block 3 and the detector body 2 can be driven to move along the length direction of the to-be-tested metal plate 11, and when the double-headed screw rod 4 rotates, the detector body 2 can be driven to move along the width direction of the to-be-tested metal plate 11; Secondly, the two ends of the sliding guide rail 6 are fixedly provided with an adjusting seat 7, the inner cavity of the adjusting seat 7 is slidably installed with a strip-shaped toothed plate 71 along the length direction of the double-headed screw rod 4, and the strip-shaped toothed plate 71 is parallel to the sliding guide rail 6, the end of the strip-shaped toothed plate 71 is fixedly provided with a pressure-bearing block 711, and the pressure-bearing block 711 is a horizontally placed right triangle structure; Further, the two ends of the double-headed screw rod 4 are fixedly provided with a driving gear 41, the outer side of the driving gear 41 is provided with a vertical plate 8 which is relatively fixed with the connecting block 5, the lower end of the vertical plate 8 is fixedly provided with an extrusion plate 81, the extrusion plate 81 extrudes the side surface of one pressure-bearing block 711 and drives the strip-shaped toothed plate 71 to be engaged with the driving gear 41, as shown in Figure 1 and Figure 4 As shown, when the connecting block 5 slides between the two adjusting seats 7, the driving gear 41 does not contact the strip-shaped toothed plate 71, the driving gear 41 and the double-headed screw rod 4 are fixed in position and do not rotate, when the connecting block 5 slides and approaches the adjusting seat 7, the extrusion plate 81 at the lower end of the vertical plate 8 will first contact and extrude the inclined side surface of the pressure-bearing block 711 at one end of the strip-shaped toothed plate 71, at this time, the strip-shaped toothed plate 71 slides along the length direction of the double-headed screw rod 4 until it is aligned with the driving gear 41, then the driving gear 41 is engaged with the strip-shaped toothed plate 71, the driving gear 41 drives the double-headed screw rod 4 to rotate, and further drives the sliding block 3 and the detector body 2 to move; As can be seen from the above, when the detector body 2 reciprocally moves along the length direction of the metal plate 11, the detector body 2 can automatically adjust the position along the width direction of the metal plate 11. By arranging two detector bodies 2 at the two ends of the double-end screw rod 4, the moving path of the detector body 2 can be as shown by the dotted line in Figure 7 . After the detection result of the detector body 2 is introduced into an external computer for processing, a rectangular coordinate system as shown in Figure 9 is established, in which the position of the detector body 2 along the length direction of the metal plate 11 is taken as the x-axis coordinate, and the vertical distance between the detector body 2 and the metal plate 11 is taken as the y-axis coordinate. In the figure, the same curve represents a plurality of groups of data detected when the detector body 2 moves along the length direction of the metal plate 11, and different curves represent a plurality of groups of data detected when the detector body 2 moves along the length direction of the metal plate 11 again after adjusting the position along the width direction of the metal plate 11. The data in Figure 9 is further processed, as shown in Figure 10 . A space coordinate system is established, in which the offset of the detector body 2 of the device along the width direction of the metal plate 11 is taken as the z-axis. The curves in Figure 9 are translated along the z-axis direction, so as to simulate the three-dimensional structure of the surface of the metal plate 11. In this way, the flatness of the surface of the metal plate 11 can be clearly and intuitively displayed; In addition, based on the plurality of groups of data detected by the detector body 2, the flatness of the surface of the metal plate 11 is calculated, and the plate shape of the metal plate is represented by a warping waveform, i.e., warping degree:

[0022] In combination with Figure 8 , the metal plate 11 is regarded as a sine wave, Rv is the amplitude, and Lv is the wavelength; The length of the curve part corresponding to the straight line part of Lv is , and it is considered that the curve changes according to the sine rule:

[0023] Therefore, the length of the curve part can be calculated by line integral:

[0024] After the above formula is arranged, the relative length difference between the curve part and the straight line part is:

[0025]

[0026] wherein, is the warping degree, is the relative length difference. Formula simplification: according to the principle of band type, it is basically considered that the band type is a regular sine wave, then the relative difference between the waveform part and the straight line part is calculated by using the method of line integral, and then the relative difference is multiplied by 10 to quantify the degree of band type (i.e. converted into band type I value); 5 According to the principle, only the wave height and wave distance of the waveform part need to be measured, and then the waveform value can be calculated:

[0027] In addition, it needs to be known that the actual band type of the to-be-measured metal plate 11 is not a regular sine wave, so when measuring the wave height and wave distance, the adjacent two positions are always calculated and measured, and the I value calculated is also multiple, and each I value corresponds to the flatness of different positions on the to-be-measured metal plate 11. By comparing the sizes of multiple I values, the maximum deformation degree of the to-be-measured metal plate 11 can be known. The present application only provides a device for detecting the to-be-measured metal plate 11. As for the multiple groups of data obtained after calculation, corresponding analysis and processing can be carried out based on the conventional technical means for data processing in the prior art, which will not be enumerated one by one here.

[0028] In order to control the meshing and separation between the driving gear 41 and the strip-shaped toothed plate 71, the pressure blocks 711 of the present application are arranged in two groups and located at two ends of the strip-shaped toothed plate 71 respectively. The two pressure blocks 711 of one group are distributed in a central symmetry around the center of the strip-shaped toothed plate 71. The extrusion plate 81 extrudes the side surface of the other pressure block 711 and drives the strip-shaped toothed plate 71 to be horizontally dislocated from the driving gear 41, in combination with Figure 4 As shown, when the extrusion plate 81 extrudes the pressure block 711 at one end of the strip-shaped toothed plate 71, the strip-shaped toothed plate 71 can be moved to correspond to and mesh with the driving gear 41. Then the driving gear 41 and the extrusion plate 81 pass over the strip-shaped toothed plate 71 (i.e. Figure 4 As shown in the state), then when the double-headed screw 4 moves reversely, the extrusion plate 81 extrudes the pressure block 711 at the other end of the strip-shaped toothed plate 71. At this time, the strip-shaped toothed plate 71 is away from the driving gear 41 and dislocated from it, so as to avoid the position of the detector body 2 being reset due to the reverse rotation of the driving gear 41.

[0029] In order to avoid the movement interference between the driving gear 41 and the pressure block 711, the tooth groove on the strip-shaped toothed plate 71 of the present application is located on the upper surface of the strip-shaped toothed plate 71. The strip-shaped toothed plate 71 is flush with the lower side edge of the driving gear 41. Therefore, after the strip-shaped toothed plate 71 is aligned with the driving gear 41, the driving gear 41 can mesh with the strip-shaped toothed plate 71. The horizontal height of the upper surface of the pressure block 711 is lower than the horizontal height of the tooth groove on the strip-shaped toothed plate 71. During the movement of the double-headed screw 4, the movement interference will not be caused between the driving gear 41 and the pressure block 711.

[0030] ​In order to avoid the extrusion plate 81 being stuck, the extrusion plate 81 of the application is consistent with the height dimension of the pressure block 711, the two ends of the extrusion plate 81 are provided with a round corner and form an extrusion head 82, the setting of the extrusion head 82 can avoid the extrusion plate 81 and the pressure block 711 being stuck when they are in contact, the shaft roller 83 is rotatably installed in the middle of the extrusion plate 81, and the diameter dimension of the shaft roller 83 is greater than the horizontal width dimension of the extrusion plate 81, the setting of the shaft roller 83 can be used to reduce the friction between the side surface of the extrusion plate 81 and the side surface of the strip-shaped toothed plate 71.

[0031] In order to guide the movement of the strip-shaped toothed plate 71, the application also has a base 73 fixedly installed at the bottom of the inner cavity of the adjusting seat 7, the upper surface of the base 73 is fixedly installed with a mounting seat 72 through bolts, a plurality of bolt holes are formed in the base 73, which can be used to adjust the position of the mounting seat 72 when it is installed, the mounting seat 72 is set as an open upward "Fang" shape, two guide cross bars 721 are fixedly arranged in the inner cavity of the mounting seat 72, two sleeves 712 are fixedly installed on the lower surface of the strip-shaped toothed plate 71, and the two sleeves 712 are movably sleeved outside the two guide cross bars 721, the cooperation of the guide cross bars 721 and the sleeves 712 makes the strip-shaped toothed plate 71 only be able to slide along the length direction of the guide cross bars 721.

[0032] In order to reset the movement of the strip-shaped toothed plate 71, the application also has a reset spring 722 sleeved outside both ends of the guide cross bar 721, the two ends of the reset spring 722 abut against the end surface of the sleeve 712 and the inner side wall of the mounting seat 72 respectively, the reset spring 722 is in a compressed state, and the reset spring 722 is mainly used for resetting the strip-shaped toothed plate 71, so that the strip-shaped toothed plate 71 can automatically return to the initial position after being separated from the extrusion plate 81, in order to facilitate the contact with the extrusion plate 81 next time, the avoiding groove 74 is formed in the upper surface of the adjusting seat 7, the extrusion plate 81 and the driving gear 41 correspond to the avoiding groove 74, and the avoiding groove 74 is mainly used for avoiding the collision between the driving gear 41, the extrusion plate 81 and the adjusting seat 7.

[0033] In order to install and position the extrusion plate 81 and the vertical plate 8, the application also has a guide shaft 51 parallel to the double-headed screw rod 4, two connecting blocks 5 are respectively fixed to the two ends of the guide shaft 51, the guide shaft 51 is arranged to fix and connect the two connecting blocks 5 together, thereby reducing the shaking and deformation of the equipment, a protective cover 54 is fixed to the outside of the connecting block 5, the vertical plate 8 and the driving gear 41 are located in the inner cavity of the protective cover 54, and the upper end of the vertical plate 8 is fixedly connected with the guide shaft 51, the protective cover 54 can be arranged to protect the driving gear 41, so as to avoid water and dust entering, the middle part of the vertical plate 8 is movably sleeved outside the double-headed screw rod 4, and the vertical plate 8 is relatively fixed with the connecting block 5 through the guide shaft 51, so that the positions of the vertical plate 8 and the extrusion plate 81 can be kept stable, and the positions of the vertical plate 8 and the extrusion plate 81 will not be deviated due to extrusion between the vertical plate 8 and the pressure block 711.

[0034] In order to slide the connecting block 5 with the sliding rail 6, the application also has a sliding seat 52 fixedly connected to the lower end of the connecting block 5, the middle part of the sliding rail 6 is provided with a sliding groove 61, and the upper side of the sliding groove 61 has an opening, the sliding seat 52 is slidably installed in the inner cavity of the sliding groove 61 and is matched with the sliding groove 61, as shown in Figure 1 and 2 As shown, the sliding seat 52 and the sliding groove 61 can guide the horizontal sliding of the guide shaft 51 and the double-headed screw rod 4, and ensure that the double-headed screw rod 4 and the connecting block 5 can only move along the length direction of the metal plate 11 to be detected.

[0035] In order to drive the connecting block 5 to slide back and forth, the application also has a driving screw rod 53 threadedly penetrating the middle part of the sliding seat 52, the two ends of the driving screw rod 53 are movably penetrated through the inner walls of the two ends of the sliding groove 61 through bearings, one end of the sliding rail 6 is provided with a forward and reverse motor for driving the driving screw rod 53 to rotate, the forward and reverse motor is used to drive the driving screw rod 53 to rotate forward and reverse when working, so as to drive the connecting block 5 to slide back and forth along the length direction of the metal plate 11 to be detected, and then drive the detector body 2 to move back and forth above the metal plate 11 to be detected.

[0036] In order to improve the detection efficiency of the metal plate 11 to be detected, the upper end of the sliding block 3 is movably sleeved outside the guide shaft 51, the sliding block 3 can only slide along the length direction of the double-headed screw rod 4 and the guide shaft 51, and the sliding block 3 itself will not rotate and deviate, the middle part of the double-headed screw rod 4 and the middle part of the guide shaft 51 are both fixedly provided with an annular baffle 42, the sliding block 3 is provided with two and located on the two sides of the annular baffle 42, the detector body 2 is provided with two and fixedly connected to the lower ends of the two sliding blocks 3 through the mounting frames 21, and the two sliding blocks 3 and the two detector bodies 2 can improve the detection efficiency of the metal plate 11 to be detected, and the detection routes of the two mounting frames 21 can be as shown in Figure 7by the dashed line in FIG. 1.

[0037] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A metal sheet surface flatness detection device, characterized by: Include: Workbench (1), the upper surface of the workbench (1) is placed with a to-be-tested metal plate (11), the upper side of the to-be-tested metal plate (11) is provided with a detector body (2), the lower end of the detector body (2) is fixedly installed on the sliding block (3), the lower end of the sliding block (3) is provided with a horizontally placed double-headed screw rod (4) through threaded movement, the outer side of both ends of the double-headed screw rod (4) is movably sleeved with a connecting block (5), the connecting block (5) is slidably installed on the sliding guide rail (6) below the connecting block (5), and both ends of the sliding guide rail (6) are fixedly provided with an adjusting seat (7). The inner cavity of the adjusting seat (7) is slidably installed with a strip-shaped toothed plate (71) along the length direction of the double-headed screw rod (4), and the strip-shaped toothed plate (71) is parallel to the sliding guide rail (6), the end of the strip-shaped toothed plate (71) is fixedly provided with a pressure block (711), and the pressure block (711) is a horizontally placed right triangle structure. Both ends of the double-headed screw rod (4) are fixedly provided with a driving gear (41), the outer side of the driving gear (41) is provided with a vertical plate (8) which is relatively fixed with the connecting block (5), the lower end of the vertical plate (8) is fixedly provided with an extrusion plate (81), the extrusion plate (81) extrudes the side of one pressure block (711) and drives the strip-shaped toothed plate (71) to correspond and engage with the driving gear (41).

2. The metal plate surface flatness detection device according to claim 1, characterized in that: The pressure block (711) is provided with two groups, and is respectively located at both ends of the strip-shaped toothed plate (71), the two pressure blocks (711) of one group are centrally symmetrically distributed around the center of the strip-shaped toothed plate (71), and the extrusion plate (81) extrudes the side of the other pressure block (711) and drives the strip-shaped toothed plate (71) to be horizontally misaligned with the driving gear (41).

3. The metal sheet surface flatness detection device according to claim 2, characterized in that: The tooth groove on the strip-shaped toothed plate (71) is located on the upper surface of the strip-shaped toothed plate (71), the strip-shaped toothed plate (71) is flush with the lower side edge of the driving gear (41), and the horizontal height of the upper surface of the pressure block (711) is lower than the horizontal height of the tooth groove on the strip-shaped toothed plate (71).

4. The metal plate surface flatness detection device according to claim 3, characterized in that: The height dimension of the extrusion plate (81) and the pressure block (711) is consistent, both ends of the extrusion plate (81) are provided with a round corner and form an extrusion head (82), and a shaft roller (83) is rotatably installed on the middle part of the extrusion plate (81), and the diameter dimension of the shaft roller (83) is greater than the horizontal width dimension of the extrusion plate (81).

5. The metal sheet surface flatness detection device according to claim 4, characterized in that: The inner cavity bottom of the adjusting seat (7) is fixedly installed with a base (73), the upper surface of the base (73) is fixedly installed with a mounting seat (72) through bolts, the mounting seat (72) is provided in a " " character shape with the opening upward, two guide cross bars (721) are fixedly arranged in the inner cavity of the mounting seat (72), and two sleeves (712) are fixedly installed on the lower surface of the strip-shaped toothed plate (71), and the two sleeves (712) are movably sleeved outside the two guide cross bars (721).

6. The metal plate surface flatness detection device according to claim 5, characterized in that: Both ends of the guide crossbar (721) are sleeved with reset springs (722), both ends of the reset spring (722) abut against the end face of the sleeve (712) and the inner side wall of the mounting seat (72) respectively, the reset spring (722) is in a compressed state, the upper surface of the adjusting seat (7) is provided with an avoiding slot (74), and the extrusion plate (81) and the driving gear (41) correspond to the avoiding slot (74).

7. The metal sheet flatness detection device according to claim 6, characterized in that: The upper portion of the double-headed screw rod (4) is provided with a guide shaft (51) parallel to the double-headed screw rod (4), two connecting blocks (5) are fixed to the two ends of the guide shaft (51), the outer side of the connecting block (5) is fixed with a protective cover (54), the vertical plate (8) and the driving gear (41) are located in the inner cavity of the protective cover (54), and the upper end of the vertical plate (8) is fixedly connected with the guide shaft (51), and the middle portion of the vertical plate (8) is movably sleeved on the outer side of the double-headed screw rod (4).

8. The metal sheet flatness detection device according to claim 7, characterized in that: The lower end of the connecting block (5) is fixedly connected with a sliding seat (52), the middle portion of the sliding guide rail (6) is provided with a sliding groove (61), and the upper side of the sliding groove (61) has an opening, the sliding seat (52) is slidingly installed in the inner cavity of the sliding groove (61) and is matched with the sliding groove (61).

9. The metal sheet flatness detection device according to claim 8, characterized in that: The middle portion of the sliding seat (52) is connected with a driving screw rod (53) through threads, both ends of the driving screw rod (53) are movably penetrated through the inner walls of both ends of the sliding groove (61) through bearings, and one end of the sliding guide rail (6) is provided with a forward and reverse motor for driving the driving screw rod (53) to rotate.

10. The metal sheet surface flatness detection device according to claim 9, characterized in that: The upper end of the sliding block (3) is movably sleeved on the outer side of the guide shaft (51), the middle portion of the double-headed screw rod (4) and the middle portion of the guide shaft (51) are fixedly connected with annular baffles (42), the sliding block (3) is provided with two sliding blocks (3) and is located on both sides of the annular baffle (42), and the detector body (2) is provided with two detectors (2) and is fixed to the lower ends of the two sliding blocks (3) through mounting frames (21).

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