Workpiece thickness detection device

Abstract

The utility model relates to the technical field of dimension detection, and discloses a machined part thickness detection device which comprises a base, a belt conveyor is arranged on the base and comprises a belt roller, one end of the belt roller is fixedly connected with an output shaft of a gear motor, the gear motor is fixed on the upper portion of the base, and a guide rail A and a guide rail B are arranged on the base. A guide rail A and a guide rail B are arranged on the left side and the right side of the belt conveyor respectively, a lifting mechanism A is installed on the guide rail A, an infrared distance measuring sensor A is arranged on the side, facing the belt conveyor, of the lifting mechanism A, and a datum plate A is arranged on the right side of the lifting mechanism A; a lifting mechanism B is installed on the guide rail B. An infrared distance measuring sensor B is arranged on the side, facing the belt conveyor, of the lifting mechanism B. A datum plate B is arranged on the left side of the lifting mechanism B. Infrared rays of the infrared distance measuring sensor A point to the center of the datum plate B.

Description

Technical Field

[0001] This utility model relates to the technical field of dimensional inspection, and specifically relates to a thickness inspection device for workpieces. Background Art

[0002] In machining, especially for workpieces processed by planers and milling machines, detecting their thickness tolerances is a necessary means to control the quality of workpieces. Currently, an infrared ranging sensor is used to detect the numerical difference between the height value of the workpiece and the value of the platform to calculate the thickness of the workpiece. For some precision workpieces, extremely high requirements are imposed on the entire thickness surface. The flatness of the platform itself cannot guarantee the detection accuracy. For precision workpieces, extremely high requirements are imposed on the dimensional tolerances of the entire thickness surface. Detecting the thickness at only one point or a few points obviously cannot meet the detection requirements. Content of the Utility Model

[0003] In order to overcome the above deficiencies, this utility model provides a thickness inspection device for workpieces.

[0004] The technical solution adopted by this utility model is as follows:

[0005] A thickness inspection device for workpieces includes a base. A belt conveyor is arranged on the base. The belt conveyor includes belt rollers, and one end of a belt roller is fixedly connected to the output shaft of a reduction motor. The reduction motor is fixed on the upper part of the base. Guide rails A and B are arranged on the base. Guide rails A and B are respectively on the left and right sides of the belt conveyor. A lifting mechanism A is installed on guide rail A. The lifting mechanism A is provided with an infrared ranging sensor A on the side facing the belt conveyor, and a reference plate A is arranged on the right side of the lifting mechanism A. A lifting mechanism B is installed on guide rail B. The lifting mechanism B is provided with an infrared ranging sensor B on the side facing the belt conveyor, and a reference plate B is arranged on the left side of the lifting mechanism B. The infrared rays of the infrared ranging sensor A point to the center of the reference plate B, and the infrared rays of the infrared ranging sensor B point to the center of the reference plate A. The infrared rays of the infrared ranging sensor A and the infrared ranging sensor B are parallel to the belt rollers.

[0006] The lifting mechanism A and the lifting mechanism B have the same structure, and the guide rail A and the guide rail B have the same structure. The guide rail B is a square cylindrical structure, and a rack is set on the outer wall of the guide rail B. The lifting mechanism B includes a shell, which is sleeved on the outside of the guide rail B. The outer wall of the shell is fixedly connected to a servo motor, and the output shaft of the servo motor is fixedly connected to a gear. The gear is meshed with the rack, and the rack is in a notch. The notch is set on the side wall of the shell, and guide rollers are respectively set on both sides of the guide rail B. The two guide rollers are respectively rotatably connected to the left and right inner walls of the shell. The left and right outer walls of the guide rail B respectively have grooves, and the two guide rollers are respectively abutted against the grooves on both sides. Two elastic rollers are set on the outer wall of the shell. Assembly, two elastic roller assemblies are located on both sides of the rack, the elastic roller assembly includes a fixed support plate, a movable support plate, a bearing group and a roller, the roller is against the outer wall of the guide rail B, the inner end face of the guide rail B is gap-matched with the inner wall of the shell, the movable support plate is plugged into the fixed support plate, the movable support plate has a support shaft on one side of the plug-in, the support shaft is plugged into the support plate, the support shaft and the support plate are slidingly matched, the movable support plates are rotatably connected to the rollers by the bearing group, one side of the fixed support plate has a countersunk hole, and the other side of the fixed support plate is fixedly connected to the inner wall of the shell, a compression spring is provided in the countersunk hole, and the support shaft is in the countersunk hole and abuts against the end of the compression spring.

[0007] The tolerance grade of the flatness and straightness of the sliding connection surface between the guide rail B and the housing is one to two grades higher than the form and position tolerance of the workpiece being inspected.

[0008] The outer wall of the shell is fixedly connected to the protective cover, and the servo motor and the gear are inside the protective cover.

[0009] Beneficial effects of the utility model:

[0010] The belt conveyor drives the workpiece to move slowly. At this time, the servo motors of the lifting mechanism A and the lifting mechanism B run synchronously. The lifting mechanism A and the lifting mechanism B move up and down at the same time to scan and detect the thickness of the workpiece, so that the detection is expanded to the entire surface of the workpiece, meeting the detection requirements of precision workpieces. The guide rails A and B with high processing precision can reduce detection errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 yes Figure 1 Left view of;

[0013] Figure 3 This is a schematic structural diagram of the lifting mechanism B and the guide rail B in the utility model;

[0014] Figure 4 This is a structural diagram of the elastic roller assembly in the utility model;

[0015] Figure 5It is a schematic structural diagram of the outer shell of the utility model.

[0016] In all the attached drawings, the reference numerals are specifically as follows: 1, base; 2, belt conveyor; 3, guide rail A; 4, lifting mechanism A; 5, infrared distance measuring sensor A; 6, guide rail B; 61, rack; 7, reference plate B; 8, lifting mechanism B; 9, reference plate A; 10, infrared distance measuring sensor B; 11, outer shell; 12, guide roller assembly; 13, gear; 14, servo motor, 15, elastic roller assembly; 151, fixed support plate; 1511, counterbore; 152, moving support plate; 1521, support shaft; 153, compression spring; 154, roller; 16, reduction motor; 17, protective cover; 18, belt roller; 19, groove; 20, notch. Specific embodiments

[0017] As Figures 1-5 shown: A workpiece thickness detection device includes a base 1; a belt conveyor 2 is arranged on the base 1. The belt conveyor 2 includes a belt roller 18. One end of the belt roller 18 is fixedly connected to the output shaft of a reduction motor 16. The reduction motor 16 is fixed on the upper part of the base 1. Guide rail A 3 and guide rail B 6 are arranged on the base 1. Guide rail A 3 and guide rail B 6 are respectively on the left and right sides of the belt conveyor 2. A lifting mechanism A 4 is installed on the guide rail A 3. The lifting mechanism A 4 is provided with an infrared distance measuring sensor A 5 on the side facing the belt conveyor 2. A reference plate A 9 is arranged on the right side of the lifting mechanism A 4; a lifting mechanism B 8 is installed on the guide rail B 6. The lifting mechanism B 8 is provided with an infrared distance measuring sensor B 10 on the side facing the belt conveyor 2. A reference plate B 7 is arranged on the left side of the lifting mechanism B 8. The infrared ray of the infrared distance measuring sensor A 5 points to the center of the reference plate B 7. The infrared ray of the infrared distance measuring sensor B 10 points to the center of the reference plate A 9. The infrared rays of the infrared distance measuring sensor A 5 and the infrared distance measuring sensor B 10 are parallel to the belt roller 18;

[0018] The structures of the lifting mechanism A4 and the lifting mechanism B8 are the same, and the structures of the guide rail A3 and the guide rail B6 are the same. The guide rail B6 is of a square column structure, and a rack 61 is provided on the outer wall of the guide rail B6. The lifting mechanism B8 includes a housing 11, the housing 11 is sleeved outside the guide rail B6, a servo motor 14 is fixedly connected to the outer wall of the housing 11, an output shaft of the servo motor 14 is fixedly connected with a gear 13, the gear 13 meshes with the rack 61, the rack 61 is within a notch 20, the notch 20 is provided on the side wall of the housing 11, guide rollers 12 are respectively arranged on both sides of the guide rail B6, and the two guide rollers 12 are respectively rotatably connected to the left and right inner walls of the housing 11. Grooves 19 are respectively provided on the outer walls of the left and right sides of the guide rail B6, and the two guide rollers 12 respectively abut within the grooves 19 on both sides. Two elastic roller assemblies 15 are provided on the outer wall of the housing 11, the two elastic roller assemblies 15 are located on both sides of the rack 61, the elastic roller assembly 15 includes a fixed support plate 151, a movable support plate 152, a bearing group and a roller 154, the roller 154 abuts against the outer wall of the guide rail B6, the inner side end face of the guide rail B6 and the inner wall of the housing 11 are in clearance fit, the movable support plate 152 is inserted into the fixed support plate 151, the movable support plate 152 has a support shaft 1521 on the inserted side, the support shaft 1521 is inserted into the support plate 151, the support shaft 1521 and the support plate 151 are in sliding fit, the roller 154 is rotatably connected between the movable support plates 152 through the bearing group, a counterbore 1511 is provided on one side of the fixed support plate 151, the other side of the fixed support plate 151 is fixedly connected to the inner wall of the housing 11, a compression spring 153 is arranged in the counterbore 1511, and the support shaft 1521 is within the counterbore 1511 and abuts against the end of the compression spring 153.

[0019] The tolerance grades of the flatness and straightness of the sliding connection surface between the guide rail B6 and the housing 11 are one to two grades higher than the geometric tolerance of the workpiece to be detected.

[0020] A protective cover 17 is fixedly connected to the outer wall of the housing 11, and the servo motor 14 and the gear 13 are inside the protective cover 17.

[0021] An elastic roller assembly 15 is arranged inside the housing 11, and the roller 154 of the elastic roller assembly 15 abuts against the outer wall of the guide rail B6, so that the guide rail B6 and the housing 11 are always kept in close sliding connection, that is, the housing 11 moves up and down in a straight line, eliminating the clearance and vibration during the transmission of the gear 13 and the rack 61, and ensuring that the distance between the infrared distance measuring sensor B10 and the reference plate A9 remains unchanged.

[0022] The distance between the infrared distance measuring sensor B10 and the reference plate A9 is L, the distance between the infrared distance measuring sensor A5 and the reference plate B7 is L, the distance detected by the infrared distance measuring sensor A5 for the workpiece is L1, the distance detected by the infrared distance measuring sensor B10 for the workpiece is L2, then the thickness of the workpiece is equal to L - L1 - L2.

[0023] During actual detection, the belt conveyor 2 drives the workpiece to move slowly. At this time, the servo motors 14 of the lifting mechanism A4 and the lifting mechanism B8 operate synchronously, and the lifting mechanism A4 and the lifting mechanism B8 move up and down simultaneously to scan and detect the thickness of the workpiece, so that the detection is extended to the entire surface of the workpiece, meeting the detection requirements of precision workpieces.

[0024] The flatness and straightness tolerance grades of the sliding connection surface between the guide rail B6 and the housing 11 are one to two grades higher than the geometric tolerance of the workpiece to be detected, ensuring the detection accuracy.

[0025] The housing 11 is provided with a protective cover 17 outside the servo motor 14 and the gear 13.

Claims

1. A thickness detection device for a workpiece, comprising a base (1), characterized in that: A belt conveyor (2) is provided on a base (1). The belt conveyor (2) includes a belt roller (18). One end of the belt roller (18) is fixedly connected to the output shaft of a reduction motor (16). The reduction motor (16) is fixed on the upper part of the base (1). A guide rail A (3) and a guide rail B (6) are provided on the base (1). The guide rail A (3) and the guide rail B (6) are respectively on the left and right sides of the belt conveyor (2). A lifting mechanism A (4) is installed on the guide rail A (3). The lifting mechanism A (4) is provided with an infrared distance measuring sensor A (5) on the side facing the belt conveyor (2), and a reference plate A (9) is provided on the right side of the lifting mechanism A (4). A lifting mechanism B (8) is installed on the guide rail B (6). The lifting mechanism B (8) is provided with an infrared distance measuring sensor B (10) on the side facing the belt conveyor (2), and a reference plate B (7) is provided on the left side of the lifting mechanism B (8). The infrared ray of the infrared distance measuring sensor A (5) points to the center of the reference plate B (7), and the infrared ray of the infrared distance measuring sensor B (10) points to the center of the reference plate A (9). The infrared rays of the infrared distance measuring sensor A (5) and the infrared distance measuring sensor B (10) are parallel to the belt roller (18). The lifting mechanism A (4) and the lifting mechanism B (8) have the same structure, and the guide rail A (3) and the guide rail B (6) have the same structure. The guide rail B (6) is of a square column structure, and a rack (61) is provided on the outer wall of the guide rail B (6). The lifting mechanism B (8) includes a housing (11), and the housing (11) is sleeved outside the guide rail B (6). A servo motor (14) is fixedly connected to the outer wall of the housing (11), and a gear (13) is fixedly connected to the output shaft of the servo motor (14). The gear (13) meshes with the rack (61). The rack (61) is within a notch (20), and the notch (20) is provided on the side wall of the housing (11). Guide rollers (12) are respectively arranged on both sides of the guide rail B (6), and the two guide rollers (12) are respectively rotatably connected to the left and right inner walls of the housing (11). Grooves (19) are respectively provided on the left and right outer walls of the guide rail B (6), and the two guide rollers (12) respectively abut within the grooves (19) on both sides. Two elastic roller assemblies (15) are provided on the outer wall of the housing (11), and the two elastic roller assemblies (15) are located on both sides of the rack (61). The elastic roller assembly (15) includes a fixed support plate (151), a movable support plate (152), a bearing group, and a roller (154). The roller (154) abuts against the outer wall of the guide rail B (6). The inner side end surface of the guide rail B (6) has a clearance fit with the inner wall of the housing (11). The movable support plate (152) is inserted into the fixed support plate (151). The movable support plate (152) has a support shaft (1521) on the inserted side, and the support shaft (1521) is inserted into the support plate (151). The support shaft (1521) has a sliding fit with the support plate (151). The roller (154) is rotatably connected between the movable support plates (152) through the bearing group. A counterbore (1511) is provided on one side of the fixed support plate (151), and the other side of the fixed support plate (151) is fixedly connected to the inner wall of the housing (11). A compression spring (153) is provided in the counterbore (1511), and the support shaft (1521) is within the counterbore (1511) and abuts against the end of the compression spring (153).

2. The thickness detection device for a workpiece according to claim 1, wherein: A protective cover (17) is fixedly connected to the outer wall of the housing (11), and the servo motor (14) and the gear (13) are inside the protective cover (17).

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