Conversion detection error-proofing device

Abstract

A conversion detection mistake proofing device comprises a clamping and positioning mechanism and an amplification distance measuring mechanism, the clamping and positioning mechanism is used for clamping and positioning a to-be-measured piece, and the amplification distance measuring mechanism is arranged on one side of the clamping and positioning mechanism; the amplification distance measurement mechanism comprises a mounting frame, an amplification rod is rotationally connected to the mounting frame, the two sides of a connection point of the amplification rod are a short rod end and a long rod end respectively, and the short rod end abuts against a to-be-tested piece during testing; a distance sensor is also arranged on the mounting frame and is used for detecting the movement of the long rod end; the height of the boss can be converted into the movement distance of the long rod end of the boss through the amplification distance measuring mechanism, the movement distance is multiple times of the height of the boss, the low height of the boss can be amplified and detected, the requirement for a sensor is lower, and the misjudgment rate and the equipment cost are effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to a conversion detection error-proofing device. Background Art

[0002] The threshold component of a passenger car is located under the door and includes a threshold beam and a threshold strip. Its main function is to enhance the sturdiness of the vehicle body and also includes cooperating with the vehicle body frame to improve the overall rigidity. The side threshold component of a passenger car is provided with a flange edge with a boss feature formed on the flange edge. Its main function is to facilitate the matching and overlapping of parts such as the A-pillar, the inner panel of the B-pillar, and the vehicle floor reinforcement. The production process of the threshold assembly is to perform pressing after rolling to process the boss. The height of the boss after processing is 1.2mm.

[0003] After the boss processing is completed, in order to ensure that the processed boss can be well matched and overlapped, the height of the boss needs to be detected; the current detection method is that after the press process, the welding fixture of the robot resistance welding workstation uses a distance sensor for detection, specifically, the height of the part boss is directly sensed and detected. During the detection, due to the low height of the boss, the detector required is a high-precision distance sensor. For example, the M4 small distance sensor has a detection distance of 0.8mm.

[0004] However, during actual testing, the robot resistance welding will generate a strong electromagnetic field, which will affect the service life of the high-precision ranging sensor. In actual research, it was found that the service life of the M4 small ranging sensor will be much lower than its normal service life; at the same time, due to the influence of part size fluctuations (the boss surface profile is ±0.5mm), the boss will not be able to meet the detection of the M4 small ranging sensor or will be misjudged, affecting normal production. Summary of the invention

[0005] 1. Technical Problems Solved

[0006] The present invention proposes a conversion detection and error prevention device, which can convert the height of the boss into the movement distance of its long rod end through an amplifying distance measuring mechanism, wherein the movement distance is several times the height of the boss. The lower boss height can be amplified and detected, and the requirements for the sensor are lower, which effectively reduces the misjudgment rate and equipment cost.

[0007] 2. Specific technical solutions

[0008] A conversion detection error prevention device comprises a clamping and positioning mechanism and an amplifying and ranging mechanism, wherein the clamping and positioning mechanism is used for clamping and positioning a workpiece to be tested, and the amplifying and ranging mechanism is arranged on one side of the clamping and positioning mechanism; the amplifying and ranging mechanism comprises a mounting frame, and an amplifying rod is rotatably connected to the mounting frame, and the two sides of the connection point of the amplifying rod are respectively a short rod end and a long rod end, and the short rod end abuts against the workpiece to be tested during testing; a distance sensor is also arranged on the mounting frame, and the distance sensor is used to detect the movement of the long rod end.

[0009] Implementation principle and working principle:

[0010] In this solution, by setting up the clamping and positioning mechanism, the workpiece to be tested can be clamped and fixed during detection, thereby reducing the possibility of deviation during detection; when the workpiece to be tested is detected, the short rod end will be pushed downward, and then the long rod end at the other end will rotate upward, and the downward movement of the short rod end is the height of the boss of the workpiece to be tested, which is magnified several times by the length ratio of the short rod end and the long rod end to become the displacement of the long rod end, which is more conducive to the detection of the distance sensor and realizes amplified output. At the same time, it avoids the influence of size fluctuations of the workpiece to be tested, and can use sensors with lower precision, effectively reducing the cost of detection equipment while ensuring the accuracy of detection.

[0011] Preferably, a connecting rod is further provided on the mounting frame, and the other end of the connecting rod is folded upward to form a mounting end, and the magnifying rod is rotatably connected to the mounting end; the beneficial effect of this preferred embodiment is that through the folding design of the connecting rod, sufficient displacement space is left for the long rod end, so that the integration of the mechanism is higher and the integrity is better.

[0012] Preferably, one side of the long rod end of the magnifying rod is folded downward and then folded horizontally to form a placement portion. When the magnifying rod is not working, the placement portion fits with the side where the connecting rod is connected to the mounting frame. The beneficial effect of this preferred embodiment is that the placement portion fits with the side where the connecting rod is connected to the mounting frame, which can effectively avoid direct collision between the end of the long rod end of the magnifying rod and the connecting rod, reduce wear and extend service life.

[0013] Preferably, the end of the short rod end is provided with a rounded corner; the end of the long rod end is also provided with a rounded corner; the beneficial effect of this preferred embodiment is that the rounded corner treatment at both ends of the enlarged rod can effectively reduce the wear of the equipment and ensure the accuracy during long-term use.

[0014] Preferably, the distance sensor is arranged at the upper end of the placement portion.

[0015] Preferably, the clamping and positioning mechanism comprises a base, receiving parts are arranged on both sides of the upper part of the base, and the receiving parts are arranged opposite to the two sides of the workpiece to be tested respectively; a telescopic rod is fixedly arranged on one side of the lower part of the base, a crossbeam is fixedly arranged on the end of the telescopic end of the telescopic rod, and buckling parts corresponding to the receiving parts are arranged on both sides of the crossbeam in the length direction; the beneficial effect of this preferred embodiment is that when the workpiece to be tested is placed, the telescopic rod drives the crossbeam downward, and then the receiving part and the buckling part are aligned and the workpiece to be tested are clamped, so as to fix the workpiece to be tested; after the detection is completed, the telescopic rod drives the crossbeam upward to remove the workpiece to be tested, which is simple and convenient.

[0016] Preferably: the spacing of the receiving part on the base is adjustable; a screw pair is arranged on the upper part of the base, and two screw nuts with different rotation directions from the screw pair are arranged on the screw pair, and the bottoms of the two receiving parts are respectively fixedly connected to the corresponding screw nuts; the telescopic rod is any one of a hydraulic telescopic rod, a pneumatic telescopic rod or an electric telescopic rod; the beneficial effect of this preferred embodiment is: when facing different specifications of the workpieces to be tested, by rotating the screw, the two screw nuts and the upper receiving part are moved in relative or opposite directions to meet the detection of workpieces to be tested with different specifications.

[0017] Preferably, a slide groove is also provided on the side of the beam opposite to the base, the upper part of the buckling part is slidably connected in the slide groove, the outer side of the slide groove is threadedly connected with a locking screw, and the locking screw passes through the side wall of the slide groove and abuts against the upper end of the buckling part. The beneficial effects of the present invention are: through the mechanical mechanism, on the one hand, the position adjustment of the buckling part can be realized, and on the other hand, the simple mechanical structure is simple and convenient to maintain and has strong versatility.

[0018] Preferably, there are two clamping and positioning mechanisms, which are arranged along the length direction of the workpiece to be tested; a positioning pin is arranged on the base of one of the clamping and positioning mechanisms, and a positioning hole corresponding to the positioning pin is opened on the workpiece to be tested; a limiting lever is also arranged on the base where the positioning pin is located, and when the workpiece to be tested is tested, the end of the workpiece to be tested abuts against the limiting lever; the advantage of this preferred embodiment is that, through the cooperation of the snap-fitting part and the receiving part, the setting of the positioning pin and the setting of the limiting lever, the workpiece to be tested can be limited in multiple degrees of freedom, so that during testing, the offset of the workpiece to be tested is smaller and the accuracy is higher.

[0019] The beneficial effects of this program are:

[0020] 1. In this solution, by setting the clamping positioning mechanism, the cooperation of the snap-fitting part and the receiving part, the setting of the positioning pin and the setting of the limit lever can realize the limitation of the workpiece to be tested in multiple degrees of freedom, so that during the detection, the displacement of the workpiece to be tested is smaller and the accuracy is higher.

[0021] 2. The amplified distance measuring mechanism will push the short rod end downward when the workpiece is detected, and then the long rod end at the other end will rotate upward. The downward displacement of the short rod end is the height of the boss of the workpiece to be tested. The length ratio of the short rod end and the long rod end is magnified several times to become the displacement of the long rod end, which is more conducive to the detection of the distance sensor and realizes amplified output. At the same time, it avoids the influence of size fluctuations of the workpiece to be tested, and can use sensors with lower precision, effectively reducing the cost of detection equipment while ensuring the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an axonometric schematic diagram of the conversion detection error prevention device of the present invention.

[0023] Figure 2 It is a front view schematic diagram of the conversion detection error prevention device of the present invention.

[0024] Figure 3 It is a schematic diagram of the connection of the receiving part of the conversion detection error prevention device of the present invention.

[0025] Figure 4 It is a schematic diagram of the installation of the buckling part of the conversion detection error prevention device of the present invention.

[0026] Description of reference numerals:

[0027] Clamping and positioning mechanism 1, magnifying and ranging mechanism 2, piece to be measured 3, distance sensor 4, base 101, receiving part 102, telescopic rod 103, cross beam 104, buckling part 105, lead screw pair 106, lead screw nut 107, locking screw 108, positioning pin 109, limit stop rod 110, mounting frame 201, magnifying rod 202, short rod end 203, long rod end 204, connecting rod 205, mounting end 206, placement part 207. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more explicit definition of the protection scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1-Figure 4 As shown:

[0030] A conversion detection error-proofing device is used for clamping and detecting the boss of a test piece 3, and can also be used for other test pieces with small volume and distance measurement requirements. The test piece 3 in this embodiment is specifically the boss of a door sill assembly.

[0031] During implementation, the conversion detection error prevention device of the present scheme comprises a clamping and positioning mechanism 1, an amplifying and ranging mechanism 2 and a distance sensor 4, wherein the clamping and positioning mechanism 1 is used for clamping and positioning the object to be measured 3, and the amplifying and ranging mechanism 2 is fixedly connected to the left side of the clamping and positioning mechanism 1 by bolts;

[0032] The magnifying distance measuring mechanism 2 includes a mounting frame 201. The mounting frame 201 in this solution directly adopts the base 101 of the clamping positioning mechanism 1. An amplifying rod 202 is rotatably connected to the mounting frame 201. Specifically, the amplifying rod 202 is installed through a connecting rod 205; one end of the connecting rod 205 is fixed to the mounting frame 201 by bolts, and the other end is folded upward to form a mounting end 206. The amplifying rod 202 is pivotally or hinged to the end of the mounting end 206. The folding design of the connecting rod 205 leaves sufficient displacement space for the installation of the amplifying rod 202, so that the amplifying distance measuring mechanism 2 has a higher degree of integration and better integrity.

[0033] In specific implementation, the magnifying rod 202 is installed on the left and right sides of the hinge point, wherein the right side is divided into a short rod end 203 and the left side is a long rod end 204. In specific implementation, the length ratio of the short rod end 203 and the long rod end 204 is preferably 1:5, and the ratio of the long rod end 204 can be larger, so that the magnification effect is better. In this solution, the ratio is specifically 1:5. While ensuring the magnification effect, the rotation is also smoother and more coordinated;

[0034] During specific implementation, one side of the end of the long rod end 204 of the magnifying rod 202 is folded downward and then folded horizontally to form a placement portion 207. When the test piece 3 is not being tested, the placement portion 207 is in contact with the side of the connecting rod 205 that is close to the mounting frame 201. The advantage of this is that, by virtue of the placement portion 207 being in contact with the side of the connecting rod 205 that is close to the mounting frame 201, a direct collision between the end of the long rod end 204 of the magnifying rod 202 and the connecting rod 205 can be effectively avoided, thereby reducing wear during testing and extending its service life. Furthermore, in order to better reduce wear, the ends of the short rod end 203 and the long rod end 204 are both rounded.

[0035] Specifically, when the workpiece 3 to be tested is being tested, the workpiece 3 to be tested is clamped, and then the short rod end 203 is directly in contact with the boss of the workpiece 3 to be tested, so that the long rod end 204 will move upward, wherein a distance sensor 4 is also provided on the mounting frame 201, and the distance sensor is located above the long rod end 204, so that the distance change or movement distance change between the long rod end 204 and the distance sensor can be well detected. The principle of detection is: the workpiece 3 to be tested pushes the short rod end 203 to move downward, and then the long rod end 204 at the other end will rotate upward, and the downward movement amount of the short rod end 203 is the boss height of the workpiece 3 to be tested. The boss height is magnified several times by the length ratio of the short rod end 203 and the long rod end 204 to obtain the displacement of the long rod end 204, thereby realizing the amplified output, and at the same time avoiding the influence of the size fluctuation (contour) of the workpiece 3 to be tested. Even if a distance sensor 4 with lower precision is used, the accuracy of detection can be guaranteed while effectively reducing the cost of the detection equipment, and the situation of sensor detection deviation caused by too low boss height is avoided.

[0036] During implementation, the clamping and positioning mechanism 1 includes a base 101, and receiving portions 102 are provided on both sides of the upper part of the base 101, wherein the two receiving portions 102 are arranged opposite to each other and are both L-shaped, so that the workpiece 3 to be tested can be directly clamped between the L-shaped receiving portions 102, and the receiving portions 102 are specifically distributed on both sides of the width direction of the workpiece 3 to be tested; a telescopic rod 101 is fixedly provided on one side of the lower part of the base 101, wherein the telescopic rod 103 is any one of a hydraulic telescopic rod, a pneumatic telescopic rod or an electric telescopic rod, and this scheme is a pneumatic telescopic rod. In this embodiment, the telescopic rod 10 The base end of the test piece 3 is fixedly connected to the base 101 by bolts, and a crossbeam 104 is fixedly provided at the end of the telescopic end or the end of the piston rod end, and the crossbeam 104 is perpendicular to the piston rod end. Buckling parts 105 corresponding to the receiving part 102 are provided on both sides of the length direction of the crossbeam 104. When clamping and fixing, the telescopic rod 103 drives the crossbeam 104 to move downward, so that the buckling part 105 and the receiving part 102 clamp and fix the two ends of the test piece 3 in the width direction. After the detection is completed, the telescopic rod 103 drives the crossbeam 104 to move upward, and the test piece 3 is removed, which is simple and convenient.

[0037] In specific implementation, in order to cope with different specifications of the test pieces, the spacing of the receiving part 102 on the base 101 is adjustable; specifically, a screw pair 106 is provided on the upper part of the base 101, and two screw nuts 107 with different rotation directions from the screw pair 106 are provided on the screw pair 106, and the bottoms of the two receiving parts 102 are fixedly connected to the corresponding upper end faces of the screw nuts 107 by screws or welding; when dealing with different specifications of the test pieces 3, the screw width 106 is rotated in different directions, and the two screw nuts 107 will approach or move away, so as to realize the adjustment of the spacing between the two receiving parts 102, so as to cope with the installation and placement of the test pieces 3 of different specifications.

[0038] During specific implementation, since the spacing of the receiving part 102 changes, the position of the corresponding snapping part should also change. The setting of the snapping part 105 can be consistent with the setting method of the receiving part 102, that is, both are connected by a screw nut. There is a difference in this embodiment. A slide groove is also provided on the side opposite to the base 101 of the crossbeam 104, wherein the slide groove is a T-shaped groove to prevent it from falling off. The upper part of the snapping part 105 is slidably connected in the T-shaped slide groove, and a threaded hole is provided on the outer side wall of the slide groove. A locking screw 108 is threadedly connected in the threaded hole. The locking screw 108 passes through the side wall of the slide groove and abuts against the upper end of the snapping part 105 to prevent the snapping part 105 from loosening. The snapping part 105 is also L-shaped, and the setting is consistent with the receiving part 102.

[0039] In specific implementation, there are two clamping and positioning mechanisms 1, which are arranged along the length direction of the workpiece 3 to fix the two ends of the workpiece 3 to be tested respectively; a positioning pin 109 is arranged on the base 101 of one of the clamping and positioning mechanisms 1, and a positioning hole corresponding to the positioning pin 109 is opened on the workpiece 3 to be tested; a limiting stopper rod 110 is also arranged on the base 101 where the positioning pin 109 is located, and when the workpiece 3 to be tested is tested, the end of the workpiece 3 to be tested abuts against the limiting stopper rod 101; through the cooperation of the buckling part 105 and the receiving part 102, the setting of the positioning pin 109 and the setting of the limiting stopper rod 110, the workpiece 3 to be tested can be limited in multiple degrees of freedom, so that during detection, the offset of the workpiece 3 to be tested is smaller and the accuracy is higher.

[0040] Working principle:

[0041] In the present solution, by setting the clamping and positioning mechanism 1, the workpiece to be tested 3 can be clamped and fixed during detection, thereby reducing the possibility of deviation during detection; when the workpiece to be tested 3 is detected, the short rod end 203 will be pushed downward, and then the long rod end 204 at the other end will rotate upward, and the downward displacement of the short rod end 203 is the height of the boss of the workpiece to be tested 3. The length ratio of the short rod end 203 and the long rod end 201 is magnified several times to become the displacement of the long rod end 204, which is more conducive to the detection of the distance sensor 4 and realizes amplified output. At the same time, it avoids the influence of size fluctuations of the workpiece to be tested, and can use sensors with lower precision, effectively reducing the cost of detection equipment while ensuring the accuracy of detection.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims.

Claims

1. A conversion detection error-proofing device, characterized in that: The invention comprises a clamping and positioning mechanism (1) and an amplifying and ranging mechanism (2), wherein the clamping and positioning mechanism (1) is used for clamping and positioning a workpiece (3) to be tested, and the amplifying and ranging mechanism (2) is arranged on one side of the clamping and positioning mechanism (1); the amplifying and ranging mechanism (2) comprises a mounting frame (201), an amplifying rod (202) is rotatably connected to the mounting frame (201), the two sides of the connection point of the amplifying rod (202) are respectively a short rod end (203) and a long rod end (204), and the short rod end (203) is in contact with the workpiece (3) to be tested during testing; and a distance sensor (4) is also arranged on the mounting frame (201), and the distance sensor (4) is used to detect the movement of the long rod end (204).

2. The conversion detection error-proofing device according to claim 1, characterized in that: The mounting frame (201) is also provided with a connecting rod (205), the other end of the connecting rod (205) is folded upward to form a mounting end (206), and the amplifying rod (202) is rotatably connected to the mounting end (206).

3. The conversion detection error prevention device according to claim 2, characterized in that: One side of the end of the long rod end (204) of the magnifying rod (202) is folded downward and then folded horizontally to form a placement portion (207); when the magnifying rod (202) is not in operation, the placement portion (207) fits with the side of the connecting rod (205) connected to the mounting frame (201).

4. The conversion detection error-proofing device according to claim 1, characterized in that: The end of the short rod end (203) is provided with a rounded corner; the end of the long rod end (204) is also provided with a rounded corner.

5. The conversion detection error prevention device according to claim 1, characterized in that: The distance sensor (4) is arranged at the upper end of the placement portion (207).

6. The conversion detection error prevention device according to claim 1, characterized in that: The clamping and positioning mechanism (1) comprises a base (101), receiving parts (102) are arranged on both sides of the upper part of the base (101), and the receiving parts (102) are arranged opposite to both sides of the test piece (3); a telescopic rod (103) is fixedly arranged on one side of the lower part of the base (101), a crossbeam (104) is fixedly arranged at the end of the telescopic end of the telescopic rod (103), and buckling parts (105) corresponding to the receiving parts (102) are arranged on both sides of the crossbeam (104) in the length direction.

7. The conversion detection error prevention device according to claim 6, characterized in that: The spacing between the receiving portion (102) and the base (101) is adjustable; a lead screw pair (106) is arranged on the upper part of the base (101); two lead screw nuts (107) with different rotation directions from the lead screw pair (106) are arranged on the lead screw pair (106); the bottoms of the two receiving portions (102) are respectively fixedly connected to the corresponding lead screw nuts (107); and the telescopic rod (103) is any one of a hydraulic telescopic rod, a pneumatic telescopic rod or an electric telescopic rod.

8. The conversion detection error prevention device according to claim 6, characterized in that: A slide groove is also provided on the side of the cross beam (104) opposite to the base (101), and the upper part of the buckling part (105) is slidably connected in the slide groove. The outer side of the slide groove is threadedly connected with a locking screw (108), and the locking screw (108) passes through the side wall of the slide groove and abuts against the upper end of the buckling part (105).

9. The conversion detection error prevention device according to claim 6, characterized in that: There are two clamping and positioning mechanisms (1), which are arranged along the length direction of the test piece (3); a positioning pin (109) is arranged on the base (101) of one of the clamping and positioning mechanisms (1), and a positioning hole corresponding to the positioning pin (109) is opened on the test piece (3); a limit stop rod (110) is also arranged on the base (101) where the positioning pin (109) is located, and when the test piece (3) is tested, the end of the test piece (3) abuts against the limit stop rod (110).

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