A laser measuring device and method for measuring thickness of connecting rod

Abstract

The invention discloses a connecting rod thickness laser measuring device, which comprises a detection platform, a detection bracket, a laser, a standard block, and a transmission component. The slide is driven by the transmission component. The invention also discloses a connecting rod thickness laser measuring device measuring method, which comprises the following steps: a connecting rod positioning process; a standard block alignment process; a laser measuring process. This invention sets up a connecting rod thickness laser measuring device composed of a detection platform, a detection bracket, a laser, a standard block and a transmission component, thereby setting up a standard block on the upper surface of the connecting rod to be detected, measuring the total thickness, and subtracting the thickness value of the connecting rod from the total thickness, thereby realizing the measurement of the connecting rod thickness, thereby avoiding the problem that the highest point spacing value of the connecting rod surface cannot be correctly detected due to the uneven surface of the connecting rod after shot blasting treatment, and compared with manual measurement, the measurement efficiency is higher and the measurement error is smaller.

Description

Technical Field

[0001] The invention relates to the technical field related to automobile parts measurement, and in particular to a connecting rod thickness laser measuring device and a measuring method thereof. Background Art

[0002] Connecting rod is an important component of automobile engine, and its thickness has strict requirements. It is generally inspected by caliper, but manual inspection only detects the geometric dimensions of the connecting rod. As a forging product, the connecting rod needs to be inspected in full size. Although laser measurement can more comprehensively reflect the full size of the connecting rod, the surface of the connecting rod is uneven after shot blasting. When the laser is directly inspected, the actual size measured is the average value between the low point of the concave surface and the high point of the convex surface, which is smaller than the actual thickness of the connecting rod. Therefore, there is a certain measurement error between the measured value and the distance between the highest points of the upper and lower surfaces of the connecting rod workpiece, which causes the actual measured value to not meet the correct size requirements for the required measurement. Summary of the invention

[0003] The object of the present invention is to provide a connecting rod thickness laser measuring device and a measuring method thereof, so as to solve the problem that the connecting rod size detection data mentioned in the above background technology often does not conform to the correct size.

[0004] To achieve the above object, the present invention provides the following technical solution: a connecting rod thickness laser measuring device and a measuring method thereof, the connecting rod thickness laser measuring device comprising:

[0005] A detection platform, wherein linear guide rails are fixedly installed on both sides of the detection platform, and screw mounting seats are arranged at the four corners of the detection platform;

[0006] The detection bracket is arranged in a door shape, and a slide is fixedly installed at both ends of the detection bracket, and the detection bracket is slidably installed on the linear guide rail through the slide, and telescopic electric cylinders are fixedly installed at both ends of the lower side of the crossbeam of the detection bracket;

[0007] A laser, wherein the laser is fixedly mounted on a crossbeam of the detection bracket;

[0008] A standard block, which is a rectangular block and is fixedly mounted on the telescopic rod of the telescopic electric cylinder, and the connecting rod to be tested is placed on the lower side of the standard block;

[0009] Transmission assembly, the slide is driven by the transmission assembly.

[0010] Preferably, the transmission assembly is composed of a first transmission screw, a second transmission screw, a transmission sprocket, a transmission chain, a servo motor, a transmission gear and a driven gear combination, and the servo motor is fixedly mounted on the side of the detection platform through a motor bracket.

[0011] Preferably, both ends of the first transmission screw and the second transmission screw are rotatably mounted on the screw mounting seat, and the first transmission screw and the second transmission screw are fixedly mounted with transmission sprockets, and the two transmission sprockets are transmission connected by a transmission chain, the transmission gear is fixedly mounted on the rotor of the servo motor, the driven gear is fixedly mounted on the first transmission screw, and the transmission gear and the driven gear are meshingly arranged.

[0012] Preferably, a screw hole is provided on the slide seat, and the first transmission screw and the second transmission screw are installed through the screw holes on the slide seats on both sides respectively.

[0013] Preferably, a mounting groove is provided on the standard block, a wiring groove is provided on the top surface of the mounting groove, and a deflection detection component is installed in the mounting groove.

[0014] Preferably, the deflection detection assembly is composed of a mounting tube, a varistor, a reset spring, a guide rod, a connecting plate, a connecting spring and a force-carrying plate. The varistor is connected to the control center via a wire for electrical signal connection, and the laser, telescopic electric cylinder and servo motor are all connected to the control center for electrical signal connection.

[0015] Preferably, an annular plate is integrally formed on the upper end of the tube body of the mounting tube, the varistor is fixedly mounted on the annular plate, the guide rod is connected to the annular plate via a reset spring, the upper end of the guide rod is connected to a connecting spring via a connecting plate, and the upper end of the connecting spring is connected to the force-carrying plate.

[0016] Preferably, when the reset spring and the connecting spring are both in the reset state, the varistor and the force-carrying plate are separated, and at this time, the lower end of the guide rod protrudes out of the outside of the mounting groove.

[0017] Preferably, a protective layer is fixedly glued to the lower surface of the guide rod, and the protective layer is a rubber sheet.

[0018] The measuring method of the connecting rod thickness laser measuring device comprises the following steps:

[0019] Workpiece positioning process: Place the connecting rod to be tested at the specified position of the testing platform;

[0020] Standard block alignment process: drive the transmission assembly to move the standard block to just above one end of the connecting rod;

[0021] The second alignment process of the standard block: drive the telescopic electric cylinder to move, so that the standard block is pressed on the connecting rod;

[0022] Measuring process: Start the laser process measurement;

[0023] Multi-point measurement process: drive the telescopic electric cylinder to return, then drive the transmission component to move the standard block back to the appropriate position, and then cycle through the above steps.

[0024] Compared with the prior art, this application has the following beneficial effects:

[0025] By setting up a connecting rod thickness laser measuring device composed of a detection platform, a detection bracket, a laser, a standard block and a transmission component, a standard block is set up on the upper surface of the connecting rod to be detected, and the total thickness is measured. The thickness value of the connecting rod is subtracted from the total thickness value to measure the thickness of the connecting rod, thereby avoiding the problem of not being able to correctly detect the highest point spacing value on the connecting rod surface due to the uneven surface of the connecting rod after shot blasting. Compared with manual measurement, the measurement efficiency is higher and the measurement error is smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 A half-section view of a standard block of the present invention;

[0028] Figure 3 for Figure 2 A schematic diagram of the enlarged structure in the middle.

[0029] In the figure: detection platform 1, detection bracket 2, laser 3, connecting rod 4, linear guide 5, slide 6, telescopic electric cylinder 7, standard block 8, screw mounting seat 9, first transmission screw 10, second transmission screw 11, transmission sprocket 12, transmission chain 13, servo motor 14, transmission gear 15, driven gear 16, motor bracket 17, mounting groove 18, wiring groove 19, deflection detection component 20, mounting tube 21, varistor 22, reset spring 23, guide rod 24, connecting plate 25, connecting spring 26, load-bearing plate 27, wire 28, protective layer 29. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0031] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit 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.

[0032] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0035] Embodiment 1

[0036] See also Figure 1-3 The present invention provides a technical solution: a connecting rod thickness laser measuring device and a measuring method thereof, the connecting rod thickness laser measuring device comprising:

[0037] The detection platform 1 has linear guide rails 5 fixedly installed on both sides of the detection platform 1, and screw mounting seats 9 are arranged at the four corners of the detection platform 1;

[0038] The detection bracket 2 is arranged in a door shape, and the two ends of the detection bracket 2 are fixedly installed with slide seats 6, and the detection bracket 2 is slidably installed on the linear guide rail 5 through the slide seats 6, and the two ends of the lower side of the crossbeam of the detection bracket 2 are fixedly installed with telescopic electric cylinders 7;

[0039] Laser 3, laser 3 is fixedly mounted on the crossbeam of the detection bracket 2;

[0040] The standard block 8 is a rectangular block, and the standard block 8 is fixedly mounted on the telescopic rod of the telescopic electric cylinder 7, and the connecting rod 4 to be tested is placed on the lower side of the standard block 8;

[0041] The slide 6 is driven by the transmission assembly, and a connecting rod thickness laser measuring device composed of a detection platform 1, a detection bracket 2, a laser 3, a standard block 8 and a transmission assembly is set up, so that the standard block 8 is set up on the upper surface of the connecting rod 4 to be detected, and the total thickness is measured, and the thickness value of the connecting rod 4 is subtracted from the total thickness to measure the thickness of the connecting rod 4, thereby avoiding the problem of not being able to correctly detect the distance value of the highest point on the surface of the connecting rod 4 due to the uneven surface of the connecting rod 4 after shot blasting. Compared with manual measurement, the measurement efficiency is higher and the measurement error is smaller.

[0042] The transmission assembly is composed of a first transmission screw 10, a second transmission screw 11, a transmission sprocket 12, a transmission chain 13, a servo motor 14, a transmission gear 15 and a driven gear 16. The servo motor 14 is fixedly mounted on the side of the detection platform 1 through a motor bracket 17;

[0043] Both ends of the first transmission screw 10 and the second transmission screw 11 are rotatably mounted on the screw mounting seat 9, and the first transmission screw 10 and the second transmission screw 11 are fixedly mounted with a transmission sprocket 12, and the two transmission sprockets 12 are transmission-connected through a transmission chain 13, a transmission gear 15 is fixedly mounted on the rotor of a servo motor 14, and a driven gear 16 is fixedly mounted on the first transmission screw 10, and the transmission gear 15 and the driven gear 16 are meshed with each other;

[0044] The slide 6 is provided with a screw hole, and the first transmission screw 10 and the second transmission screw 11 are respectively installed through the screw holes on the slides 6 on both sides;

[0045] Working principle: A connecting rod thickness laser measuring device composed of a detection platform 1, a detection bracket 2, a laser 3, a standard block 8 and a transmission component is set up, so that the standard block 8 is set up on the upper surface of the connecting rod 4 to be detected, and the total thickness is measured, and the thickness value of the connecting rod 4 is subtracted from the total thickness value to measure the thickness of the connecting rod 4, thereby avoiding the problem that the surface of the connecting rod 4 after shot blasting cannot correctly detect the highest point spacing value of the connecting rod 4 surface. Compared with manual measurement, its measurement efficiency is higher and the measurement error is smaller. In actual use, first The connecting rod 4 to be tested is placed at the specified position of the testing platform 1, and then the transmission assembly is driven to move the standard block 8 to just above one end of the connecting rod 4, and then the telescopic electric cylinder 7 is driven to move in process, so that the standard block 8 is pressed on the connecting rod 4, and then the laser 3 is started for process measurement. When the thickness measurement of the section is completed, the telescopic electric cylinder 7 is driven to return, and then the transmission assembly is driven to move the standard block 8 back a distance, and then the above steps are cycled to measure each fill position of the connecting rod 4, so as to ensure that each position of the connecting rod 4 meets the product quality requirements, thereby effectively ensuring product quality.

[0046] Embodiment 2

[0047] The standard block 8 is provided with a mounting groove 18, and a wiring groove 19 is provided on the top surface of the mounting groove 18. A deflection detection component 20 is installed in the mounting groove 18. The deflection detection component 20 is composed of a mounting tube 21, a varistor 22, a reset spring 23, a guide rod 24, a connecting plate 25, a connecting spring 26 and a load plate 27. The varistor 22 is connected to the control center through an electrical signal through a wire 28. The laser 3, the telescopic electric cylinder 7, and the servo motor 14 are all connected to the control center through electrical signals. The upper end of the tube body of the mounting tube 21 is integrally formed with an annular plate, the varistor 22 is fixedly mounted on the annular plate, and the guide rod 24 is connected to the control center through a reset spring 23. The guide rod 24 is connected to the annular plate, and the upper end of the guide rod 24 is connected to the connecting spring 26 through the connecting plate 25. The upper end of the connecting spring 26 is connected to the load plate 27. When the reset spring 23 and the connecting spring 26 are in the reset state, the varistor 22 and the load plate 27 are separated, and the lower end of the guide rod 24 protrudes from the outside of the mounting groove 18 at this time, and the deflection of the connecting rod 4 is detected, so as to better ensure the quality of the connecting rod 4. The lower surface of the guide rod 24 is fixedly glued with a protective layer 29, and the protective layer 29 is a rubber plate to avoid crushing the connecting rod 4, so as to play a certain protective role on the connecting rod 4.

[0048] First, place the connecting rod 4 to be tested at the specified position of the testing platform 1, and then drive the transmission component to move the standard block 8 to the top of one end of the connecting rod 4, and then drive the telescopic electric cylinder 7 to move in the process, so that the standard block 8 is pressed on the connecting rod 4, and then judge whether the left and right sides of the section of the connecting rod 4 are deflected according to the force value of the varistor 22 on the deflection detection component 20 on both sides of the standard block 8. If there is no overall deflection of the connecting rod 4 workpiece, then start the laser 3 for process measurement. After the thickness measurement of the section is completed, drive the telescopic electric cylinder 7 to return, and then drive the transmission component to move the standard block 8 back one end distance, and then cycle the above steps to measure each fill position of the connecting rod 4, so as to ensure that each position of the connecting rod 4 meets the product quality requirements.

[0049] The remaining technical features and technical effects of the measuring device of this embodiment are the same as those of the first embodiment.

[0050] Embodiment 3

[0051] The measuring method of the connecting rod thickness laser measuring device comprises the following steps:

[0052] Workpiece positioning process: placing the connecting rod 4 to be tested at the specified position of the testing platform 1;

[0053] Standard block alignment process: drive the transmission assembly to move the standard block 8 to just above one end of the connecting rod 4;

[0054] The second alignment process of the standard block: drive the telescopic electric cylinder 7 to move, so that the standard block 8 is pressed on the connecting rod 4;

[0055] Measuring process: Start the laser 3 process measurement;

[0056] Multi-point measurement process: drive the telescopic electric cylinder 7 to return, then drive the transmission assembly to move the standard block 8 back to a suitable position, and then cycle through the previous steps;

[0057] The remaining technical features and technical effects of the measuring device of this embodiment are the same as those of the second embodiment.

[0058] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A connecting rod thickness laser measuring device, characterized in that: The connecting rod thickness laser measuring device comprises: A detection platform (1), wherein linear guide rails (5) are fixedly installed on both sides of the detection platform (1), and screw mounting seats (9) are arranged at the four corners of the detection platform (1); A detection bracket (2), the detection bracket (2) is arranged in a door shape, and a slide seat (6) is fixedly installed at both ends of the detection bracket (2), and the detection bracket (2) is slidably installed on the linear guide rail (5) through the slide seat (6), and a telescopic electric cylinder (7) is fixedly installed at both ends of the lower side of the cross beam of the detection bracket (2); A laser (3), wherein the laser (3) is fixedly mounted on a crossbeam of the detection bracket (2); A standard block (8), wherein the standard block (8) is a rectangular block, and the standard block (8) is fixedly mounted on the telescopic rod of the telescopic electric cylinder (7), and the connecting rod (4) to be tested is placed on the lower side of the standard block (8); A transmission assembly, wherein the slide seat (6) is driven by the transmission assembly; The transmission assembly is composed of a first transmission screw (10), a second transmission screw (11), a transmission sprocket (12), a transmission chain (13), a servo motor (14), a transmission gear (15) and a driven gear (16), and the servo motor (14) is fixedly mounted on the side of the detection platform (1) through a motor bracket (17); The standard block (8) is provided with a mounting groove (18), a wiring groove (19) is provided on the top surface of the mounting groove (18), and a deflection detection component (20) is installed in the mounting groove (18); The deflection detection assembly (20) is composed of a mounting tube (21), a varistor (22), a reset spring (23), a guide rod (24), a connecting plate (25), a connecting spring (26) and a force-carrying plate (27); the varistor (22) is connected to a control center via an electrical signal through a wire (28); and the laser (3), the telescopic electric cylinder (7) and the servo motor (14) are all connected to the control center via an electrical signal. The connecting rod (4) to be tested is placed at a specified position on the testing platform (1), and the transmission component is driven to move the standard block (8) to the position directly above one end of the connecting rod (4). The telescopic electric cylinder (7) is then driven to move, so that the standard block (8) is pressed on the connecting rod (4). Then, based on the force values ​​of the varistors (22) on the deflection detection components (20) on both sides of the standard block (8), it is determined whether the left and right sides of the section of the connecting rod (4) are deflected.

2. A connecting rod thickness laser measuring device according to claim 1, characterized in that: Both ends of the first transmission screw (10) and the second transmission screw (11) are rotatably mounted on a screw mounting seat (9), and a transmission sprocket (12) is fixedly mounted on the first transmission screw (10) and the second transmission screw (11), and the two transmission sprockets (12) are connected in transmission via a transmission chain (13), the transmission gear (15) is fixedly mounted on a rotor of a servo motor (14), the driven gear (16) is fixedly mounted on the first transmission screw (10), and the transmission gear (15) and the driven gear (16) are meshed with each other.

3. A connecting rod thickness laser measuring device according to claim 2, characterized in that: The slide seat (6) is provided with a lead screw hole, and the first transmission lead screw (10) and the second transmission lead screw (11) are respectively installed through the lead screw holes on the slide seats (6) on both sides.

4. The connecting rod thickness laser measuring device according to claim 1, characterized in that: An annular plate is integrally formed at the upper end of the tube body of the mounting tube (21), the varistor (22) is fixedly mounted on the annular plate, the guide rod (24) is connected to the annular plate via a reset spring (23), the upper end of the guide rod (24) is connected to a connecting spring (26) via a connecting plate (25), and the upper end of the connecting spring (26) is connected to a force-carrying plate (27).

5. A connecting rod thickness laser measuring device according to claim 4, characterized in that: When the reset spring (23) and the connecting spring (26) are both in the reset state, the varistor (22) and the load-bearing plate (27) are separated, and at this time, the lower end of the guide rod (24) protrudes outside the mounting groove (18).

6. A connecting rod thickness laser measuring device according to claim 5, characterized in that: A protective layer (29) is fixedly glued to the lower surface of the guide rod (24), and the protective layer (29) is a rubber plate.

7. A method for measuring connecting rod thickness by a laser measuring device according to any one of claims 1 to 6, characterized in that: The measuring method of the connecting rod thickness laser measuring device comprises the following steps: Workpiece positioning process: placing the connecting rod (4) to be tested at a designated position on the testing platform (1); The first alignment process of the standard block: driving the transmission assembly to move the standard block (8) to just above one end of the connecting rod (4); The second alignment process of the standard block: driving the telescopic electric cylinder (7) to move, so that the standard block (8) is pressed on the connecting rod (4); Measuring process: start the laser (3) process measurement; Multi-point measurement process: drive the telescopic electric cylinder (7) to return, then drive the transmission component to move the standard block (8) back to a suitable position, and then cycle through the above steps.

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