Device for detecting flatness of plate at high precision

Abstract

The invention relates to a high-precision plate flatness detection device in the technical field of sheet detection, and the device comprises a vertical frame, and the top of the vertical frame is provided with a clamping part used for clamping the upper edge part of a to-be-detected plate; the vertical frame is further provided with a detection assembly. The detection assembly comprises a front cross rod arranged in front of a to-be-detected plate and a rear cross rod arranged behind the to-be-detected plate, the cross rod is uniformly provided with a plurality of sliding rods which can vertically abut against the plate surface of the to-be-detected plate at intervals in the length direction of the cross rod, and the sliding rods penetrate through the cross rod in a sliding mode; during detection, the plate is in a vertical suspension state, so that the situation that residual stress is reduced due to unevenness of the plate under the mutual cooperation of gravity and supporting force of a platform in the prior art is avoided; and the front and back of the to-be-detected plate are provided with the sliding rods for pressing the to-be-detected plate, so that the plate is not deformed under the pressing of the sliding rods.

Description

Technical Field

[0001] The invention relates to the technical field of thin plate detection, and in particular to a device for detecting the flatness of a plate with high precision. Background Art

[0002] At present, most of the existing aluminum alloy plate flatness detection methods are carried out in accordance with the detection requirements of the GB / T3880 standard. Specifically, the plate is placed freely on the platform, and when it is balanced and stable, a feeler gauge is used to measure the maximum gap between the plate and the platform to obtain the flatness or unevenness value of the plate.

[0003] However, after the qualified products are subsequently slit or cut into small boards, some of the cut strips and small boards may be twisted, which affects their subsequent use.

[0004] After analysis, it is found that when testing the flatness of the plate, after the plate is placed freely on the platform, the gravity of the plate and the supporting force of the platform will cooperate with each other to affect the residual stress that causes its unevenness, resulting in a decrease in the unevenness value in this state, that is, the flatness of the plate is temporarily reduced; after slitting or cutting into small plates, the residual stress is released, resulting in distortion of some cut strips and small plates.

[0005] Therefore, we propose a device for detecting the flatness of a plate with high precision in a vertically suspended state. Summary of the invention

[0006] In order to overcome the deficiencies in the background technology, the present invention discloses a device for detecting the flatness of a plate with high precision.

[0007] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A device for high-precision detection of plate flatness comprises a vertical frame, the top of which is provided with a clamping member for clamping the upper edge of the plate to be detected; the vertical frame is also provided with a detection assembly; The detection assembly comprises a front cross bar arranged in front of the plate to be tested and a rear cross bar arranged behind the plate to be tested, the cross bar is evenly spaced along its length direction with a plurality of sliding rods capable of vertically contacting the plate surface of the plate to be tested, and the sliding rods slide through the cross bar, an end plate is arranged at one end of the sliding rod away from the plate to be tested, a limiting ring is arranged at a position where the sliding rod body is located between the corresponding cross bar and the plate to be tested, and a small elastic spring is matched with the position where the sliding rod body is located between the corresponding cross bar and the limiting ring; the cross bar is also provided with a plurality of displacement sensors connected one by one with the sliding rods in the same direction; The detection assembly also includes a driving device for driving the front cross bar and the rear cross bar to rise and fall.

[0008] Preferably, the sliding rods on the front cross bar are arranged in one-to-one correspondence with the sliding rods on the rear cross bar.

[0009] Preferably, a ball is embedded in one end of the sliding rod corresponding to the plate to be tested.

[0010] Preferably, a pulling piece is provided on the side of the cross bar facing away from the plate to be tested, and a sliding rod in the same direction slides through the pulling piece.

[0011] Preferably, the driving device comprises a lead screw slide pair vertically mounted on the side of the vertical frame, and the moving portion of the lead screw slide pair is connected to the end of the corresponding cross bar; The driving device also includes a driving motor for driving the lead screw of the lead screw slide rail to rotate.

[0012] Preferably, both sides of the vertical frame are provided with lead screw guide rail pairs at the front and rear, and the moving parts of the lead screw guide rail pairs on the same side are fixedly connected correspondingly.

[0013] Preferably, the clamping member includes a transverse positioning plate arranged on the inner top wall of the vertical frame and a transverse slide rail arranged on the top front side of the vertical frame, the transverse slide rail is provided with at least two sliding blocks along its length direction, and the sliding block is provided with a top rod capable of vertically squeezing the front plate surface of the plate to be tested, so as to cooperate with the transverse positioning plate to clamp the upper edge of the plate to be tested.

[0014] Preferably, there are at least three sliders, and the outermost slider is provided with a hundredth / micrometer indicator whose measuring end can contact the front plate surface of the plate to be measured.

[0015] Preferably, it further comprises a U-shaped bracket, and the two sides of the vertical frame are correspondingly rotatably connected to the two ends of the opening end of the U-shaped bracket; The open end of the U-shaped bracket is also provided with a driving device for driving the vertical frame to rotate, so that the vertical frame is in a vertical, inclined or horizontal state.

[0016] Preferably, vertical slide grooves are provided on the two inner side walls of the vertical frame corresponding to the positions behind the plate to be tested, and a plurality of transverse support rods are slidably connected between the two vertical slide grooves to support the plate to be tested in a horizontal or inclined state.

[0017] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects: 1. In the process of testing the flatness of the plate, since the plate is in a vertically suspended state, the residual stress reduction of the plate caused by the interaction between gravity and the supporting force of the platform in the prior art will not occur; and since there are sliding rods pressing the plate in front and behind, the plate will not be deformed under the pressure of the sliding rods, thereby ensuring the accuracy of the test results; 2. The setting of the clamping part can detect the fit between the upper edge of the plate to be tested and the horizontal positioning plate through the hundredth / micrometer gauge before the plate to be tested is squeezed by the ejector rod. Specifically, when the hundredth / micrometer gauge is moved laterally, at least two places will show the minimum value of the hundredth / micrometer gauge. The place where the minimum value of the hundredth / micrometer gauge appears indicates that the plate to be tested is in contact with the horizontal positioning plate at this place. The ejector rod squeezes the plate to be tested at this place, which will not cause the plate to be tested to deform, that is, it will not affect the temporary change of the flatness of the plate to be tested, thereby ensuring the accuracy of the subsequent test results; 3. The setting of the U-shaped bracket, the driving device and the horizontal support rod can place the plate to be tested when the vertical frame is in a horizontal state. After the plate to be tested is clamped by the clamping member, the vertical frame is driven to become a vertical state for testing, so that the plate to be tested can be easily installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 A local enlarged view of I in FIG. Figure 3 It is a front view of the present invention; Figure 4 for Figure 3 AA section view; Figure 5 for Figure 4 Partial enlarged view of II in the figure; Figure 6 A schematic diagram of another structure of the present invention; Figure 7 for Figure 6 Schematic diagram of the structure from another perspective; Figure 8 for Figure 6 Schematic diagram of the structure before clamping the plate to be tested; Fig. 9 for Figure 6 Schematic diagram of the structure after clamping the plate to be tested.

[0019] In the figure: 1. vertical frame; 11. vertical slide; 2. clamping part; 21. horizontal positioning plate; 22. horizontal slide rail; 23. slider; 24. push rod; 25. hundred / thousandth indicator; 3. detection component; 31. front cross bar; 32. rear cross bar; 33. sliding rod; 331. end plate; 332. ball bearing; 34. limit ring; 35. small elastic spring; 36. driving device; 361. lead screw slide rail pair; 362. driving motor; 37. pulling piece; 38. U-shaped block; 39 adjusting bolt; 4. U-shaped bracket; 5. driving equipment; 6. horizontal support rod. DETAILED DESCRIPTION

[0020] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application and are for the convenience of describing the present invention; it should be understood that if there are terms such as "end", "side", "end portion", "lateral", "lateral", "transverse", "longitudinal", etc. indicating directions or positional relationships, they only correspond to the length and width of the corresponding components, that is, the "end portion" indicates the head and tail areas in the length direction of the corresponding component, and the "side portion" indicates the head and tail areas in the width direction of the corresponding component; this is for the convenience of describing the present invention and is not to indicate or imply that the device or element referred to must have a specific direction.

[0021] Embodiment 1, in combination with the attached Figure 1-5 , a device for detecting the flatness of a plate with high precision, comprising a vertical frame 1, a clamping member 2 for clamping the upper edge of the plate to be tested is provided on the top of the vertical frame 1; the vertical frame 1 is also provided with a detection component 3; Combined with Figure 2 and 5 The detection component 3 includes a front cross bar 31 arranged in front of the plate to be tested and a rear cross bar 32 arranged behind the plate to be tested. The cross bar is evenly spaced along its length direction and has a plurality of sliding rods 33 that can vertically contact the surface of the plate to be tested, and the sliding rods 33 slide through the cross bar, and an end plate 331 is provided at the end of the sliding rod 33 away from the plate to be tested. A limit ring 34 is provided at a position between the corresponding cross bar and the plate to be tested on the rod body of the sliding rod 33; as needed, the limit ring 34 can be a circular ring welded to the rod body of the sliding rod 33, or a ring groove can be provided on the rod body of the sliding rod 33, a retaining spring clamped in the ring groove, or a screw screwed on the rod body of the sliding rod 33, or other structures that can be provided on the rod body of the sliding rod 33 and limit the end position of the small elastic spring 35. The structure of the limit ring 34 is not specifically limited here.

[0022] The rod body of the sliding rod 33 is located between the corresponding cross bar and the limiting ring 34, and a small elastic spring 35 is provided. It should be noted that: when the elastic force provided by the small elastic spring 35 is greater than the friction between the sliding rod 33 and the corresponding cross bar 31, the smaller the elastic force provided, the better the effect; the cross bar is also provided with a plurality of displacement sensors (not shown in the figure) connected one by one with the sliding rods 33 in the same direction; that is, the displacement of the corresponding sliding rod 33 can be detected by the displacement sensor, and the front and rear dimensions of the corresponding plate surface to be tested can be judged according to the displacement of the sliding rod 33, and then the flatness of the plate to be tested can be seen.

[0023] It should be noted that: a displacement sensor may be provided on one of the cross bars, or may be provided on both cross bars.

[0024] The detection assembly 3 further includes a driving device 36 for driving the front cross bar 31 and the rear cross bar 32 to rise and fall.

[0025] With such arrangement, during the process of detecting the flatness of the plate, since the plate is in a vertically suspended state, the situation in the prior art where the residual stress of the plate is reduced due to the interaction between gravity and the supporting force of the platform, causing the plate to be uneven, will not occur; and since there are sliding rods 33 at the front and rear of the plate to be tested to press it, the plate will not be deformed under the pressure of the sliding rods 33, thereby ensuring the accuracy of the detection result.

[0026] Furthermore, the sliding rods 33 on the front crossbar 31 are arranged in one-to-one correspondence with the sliding rods 33 on the rear crossbar 32. In this way, the sliding rods 33 located in the front and rear directions of the plate to be tested can better offset each other.

[0027] Furthermore, to prevent the sliding rod 33 from scratching the plate to be tested during the lifting process, a ball 332 is embedded in one end of the sliding rod 33 corresponding to the plate to be tested; that is, the sliding rod 33 can generate rolling friction with the plate to be tested through the ball 332.

[0028] Furthermore, in order to better move the sliding rod 33 to a position where it can contact the plate to be tested, a pulling piece 37 is provided on the side of the cross bar away from the plate to be tested, and the sliding rod 33 in the same direction slides through the pulling piece 37; that is, the pulling piece 37 can be pulled, and the pulling piece 37 acts on the end plate 331, thereby causing the sliding rod 33 to move in a direction away from the plate to be tested and compress the corresponding small elastic spring 35. After the sliding rod 33 moves to a position where it can contact the plate to be tested, the pulling piece 37 is slowly released, and the sliding rod 33 moves in a direction close to the plate to be tested under the action of the corresponding small elastic spring 35, and contacts the surface of the plate to be tested.

[0029] In one possible implementation, Figure 1-5 , the driving device 36 includes a screw guide rail pair 361 vertically mounted on the side of the vertical frame 1, and the moving portion of the screw guide rail pair 361 is connected to the corresponding crossbar end; The driving device 36 also includes a driving motor 362 for driving the lead screw of the lead screw slide rail pair 361 to rotate.

[0030] It should be noted that the lead screw guide rail pair 361 can be understood as a combination of a guide rail, a slider and a guide screw, wherein the guide rail is slidably connected to the slider, the slider is transmission-connected to the guide screw, and the guide screw is rotationally connected to the guide rail.

[0031] Furthermore, screw slide pairs 361 are provided at the front and rear sides of both sides of the vertical frame 1, and the moving parts of the screw slide pairs 361 on the same side are fixedly connected correspondingly; that is, there are four screw slide pairs 361, the two moving parts of the screw slide pairs 361 located on the left side of the vertical frame 1 are fixedly connected correspondingly, and the two moving parts of the screw slide pairs 361 located on the right side of the vertical frame 1 are fixedly connected correspondingly; in this way, it can be ensured that the four moving parts of the screw slide pairs 361 are at the same height, thereby ensuring that the front cross bar 31 and the rear cross bar 32 are at the same height, thereby making the front sliding rod 33 and the rear sliding rod 33 correspond one by one and coaxial.

[0032] As required, the driving motor 362 is a reduction motor; preferably, the driving motor 362 has a reduction gear with two output shafts, and the two output shafts of the reduction gear are respectively connected to the lead screws of the two lead screw guide rail pairs 361 on the same side.

[0033] In one possible implementation, Figure 5 The clamping member 2 includes a transverse positioning plate 21 arranged on the inner top wall of the vertical frame 1 and a transverse slide rail 22 arranged on the top front side of the vertical frame 1. The transverse slide rail 22 is provided with at least two sliders 23 along its length direction. The slider 23 is provided with a top rod 24 that can vertically squeeze the front surface of the plate to be tested, so as to cooperate with the transverse positioning plate 21 to clamp the upper edge of the plate to be tested.

[0034] As required, the push rod 24 may be a clamping bolt screwed to the slider 23 , or may be a cylinder or an electric telescopic rod. The structure of the push rod 24 is not specifically limited herein.

[0035] Since the lateral positioning plate 21 is a reference plate for positioning the front-rear direction of the upper edge of the substrate to be measured, preferably, in this embodiment, a displacement sensor is provided on the rear cross bar 32 .

[0036] In this embodiment, U-shaped blocks 38 are provided at both ends of the front cross bar 31 for slidingly cooperating therewith front and rear, and the ends of the front cross bar 31 are connected to the driving part of the driving device 36 through the U-shaped blocks 38, and the U-shaped blocks 38 are rotatably connected with adjusting bolts 39, and the adjusting bolts 39 are threadedly cooperating with the corresponding ends of the front cross bar 31; that is, by rotating the adjusting bolts 39, the adjusting bolts 39 can drive the front cross bar 31 to move forward to compensate for the size occupied by the thickness of the plate to be measured, so that the distance between the front cross bar 31 and the plate to be measured is consistent with the distance between the rear cross bar 32 and the plate to be measured, that is, the extrusion force of the front sliding rod 33 on the plate to be measured is consistent in magnitude with the extrusion force of the rear sliding rod 33 on the plate to be measured, and the directions are opposite.

[0037] Embodiment 2, combined with the attached Figure 2-5A device for detecting the flatness of a plate with high precision. Based on the first embodiment, the slider 23 has at least three sliders, and the outermost slider 23 is provided with a hundred / micrometer 25 whose measuring end can contact the front plate surface of the plate to be tested.

[0038] In this way, before the plate to be tested is squeezed by the push rod 24, the fit between the upper edge of the plate to be tested and the horizontal positioning plate 21 can be detected by the hundredth / micrometer 25. Specifically, when the hundredth / micrometer 25 is moved laterally, at least two places will have minimum values ​​of the hundredth / micrometer 25. The places where the minimum values ​​of the hundredth / micrometer 25 appear indicate that the plate to be tested is in fit with the horizontal positioning plate 21 at that place. The push rod 24 squeezes the plate to be tested at this place, which will not cause deformation of the plate to be tested, that is, it will not affect the temporary change of the flatness of the plate to be tested, thereby ensuring the accuracy of subsequent test results.

[0039] Embodiment 3, in combination with the attached Figure 6-9 , a device for high-precision detection of plate flatness, based on the first or second embodiment, further comprising a U-shaped bracket 4, and two sides of the vertical frame 1 are correspondingly rotatably connected to the two ends of the opening end of the U-shaped bracket 4; The open end of the U-shaped bracket 4 is also provided with a driving device 5 for driving the vertical frame 1 to rotate, so that the vertical frame 1 is in a vertical, inclined or horizontal state.

[0040] As required, the driving device 5 may be a rotary positioner, that is, the fixed portion of the driving device 5 is connected to the U-shaped bracket 4 , and the rotating portion of the driving device 5 is connected to the vertical frame 1 .

[0041] Furthermore, vertical slide grooves 11 are provided on the two inner side walls of the vertical frame 1 corresponding to the positions behind the plate to be tested, and a plurality of transverse support rods 6 are slidably connected between the two vertical slide grooves 11 to support the plate to be tested in a horizontal or inclined state.

[0042] This arrangement allows the plate to be placed in a horizontal position on the vertical frame 1. After the plate to be tested is clamped by the clamping member 2, the vertical frame 1 is driven to a vertical position for testing, so that the plate to be tested can be installed conveniently.

[0043] It should be noted that after the vertical frame 1 becomes vertical, the transverse support rod 6 will move to the bottom of the vertical frame 1 under the action of gravity, so it will not contact the plate to be tested and will not have any impact on the detection of the plate to be tested.

[0044] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A device for high-precision detection of plate flatness, characterized in that: It comprises a vertical frame (1), the top of which is provided with a clamping member (2) for clamping the upper edge of a plate to be tested; the vertical frame (1) is also provided with a detection component (3); The detection assembly (3) comprises a front cross bar (31) arranged in front of the plate to be tested and a rear cross bar (32) arranged behind the plate to be tested. The cross bar is evenly spaced along its length direction and is provided with a plurality of sliding rods (33) capable of vertically contacting the plate surface of the plate to be tested, and the sliding rods (33) slide through the cross bar. An end of the sliding rod (33) facing away from the plate to be tested is provided with an end plate (331). A position where the sliding rod (33) is located between the corresponding cross bar and the plate to be tested is provided with a limit ring (34). A position where the sliding rod (33) is located between the corresponding cross bar and the limit ring (34) is matched with a small elastic spring (35). The cross bar is also provided with a plurality of displacement sensors connected one-to-one with the sliding rods (33) in the same direction. The detection assembly (3) further comprises a driving device (36) for driving the front crossbar (31) and the rear crossbar (32) to rise and fall.

2. The device for high-precision detection of plate flatness according to claim 1 is characterized in that: The sliding rods (33) on the front cross bar (31) and the sliding rods (33) on the rear cross bar (32) are arranged in a one-to-one correspondence.

3. The device for high-precision detection of plate flatness according to claim 1 is characterized in that: A ball (332) is embedded in one end of the sliding rod (33) corresponding to the plate to be tested.

4. The device for high-precision detection of plate flatness according to claim 1 is characterized in that: A pulling piece (37) is provided on the side of the crossbar facing away from the plate to be tested, and a sliding rod (33) in the same direction slides through the pulling piece (37).

5. The device for high-precision detection of plate flatness according to claim 1 is characterized in that: The driving device (36) comprises a lead screw slide rail pair (361) vertically mounted on the side of the vertical frame (1), and the moving part of the lead screw slide rail pair (361) is connected to the end of the corresponding cross bar; The driving device (36) further comprises a driving motor (362) for driving the lead screw of the lead screw slide rail pair (361) to rotate.

6. The device for high-precision detection of plate flatness according to claim 1 is characterized in that: The vertical frame (1) is provided with a lead screw slide rail pair (361) at the front and rear of both side portions, and the movable portions of the lead screw slide rail pair (361) on the same side are fixedly connected correspondingly.

7. The device for high-precision detection of plate flatness according to claim 1 is characterized in that: The clamping member (2) comprises a transverse positioning plate (21) arranged on the inner top wall of the vertical frame (1) and a transverse slide rail (22) arranged on the top front side of the vertical frame (1), the transverse slide rail (22) being provided with at least two slide blocks (23) along its length direction, the slide block (23) being provided with a push rod (24) capable of vertically pressing the front plate surface of the plate to be tested, so as to cooperate with the transverse positioning plate (21) to clamp the upper edge of the plate to be tested.

8. The device for high-precision detection of plate flatness according to claim 7 is characterized in that: The sliders (23) are at least three in number, and the outermost slider (23) is provided with a 100 / 1000 gauge (25) whose measuring end can abut against the front surface of the plate to be measured.

9. The device for high-precision detection of plate flatness according to claim 1 is characterized in that: It also comprises a U-shaped bracket (4), and the two sides of the vertical frame (1) are correspondingly rotatably connected to the two ends of the opening of the U-shaped bracket (4); The open end of the U-shaped bracket (4) is also provided with a driving device (5) for driving the vertical frame (1) to rotate, so that the vertical frame (1) is in a vertical, inclined or horizontal state.

10. The device for high-precision detection of plate flatness according to claim 9, characterized in that: Vertical slide grooves (11) are provided at positions on the two inner side walls of the vertical frame (1) corresponding to the rear of the plate to be tested, and a plurality of transverse support rods (6) are slidably connected between the two vertical slide grooves (11) to facilitate supporting the plate to be tested in a horizontal or inclined state.

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