Straightness automatic detector

Abstract

The utility model discloses a straightness automatic detection instrument, including the detection unit for detecting work piece, set up in the detection unit one side and be used for conveying work piece's loading conveying unit. The detection unit includes the transmission device for detecting work piece transmission, sets up the fixture assembly for clamping work piece on the transmission device, is used for detecting the detection device of work piece straightness on the fixture assembly, is used for sorting the screening device of work piece on the fixture assembly to and be connected on the detection device and screening device. The straightness automatic detection instrument, in the production process, automatically screens the work piece of straightness qualification, avoids the error of artificial factor.

Description

Technical Field

[0001] This application relates to the field of workpiece inspection equipment technology, and more specifically, to an automatic straightness inspection instrument. Background Technology

[0002] In industrial sectors such as machinery manufacturing and automotive parts processing, workpiece straightness is one of the core geometric parameters for measuring product precision and assembly performance. For example, if the straightness error of critical workpieces such as machine tool guideways, engine crankshafts, and aerospace engine blade tenons exceeds the design threshold, it may lead to equipment malfunction, power transmission loss, sealing failure, or even safety accidents. Therefore, efficient and accurate straightness testing is a key link in quality control in industrial production.

[0003] Currently, the straightness of workpieces is still commonly inspected using traditional manual methods. This involves supporting the workpiece on a V-block or runout gauge, with the operator manually rotating it slowly while simultaneously measuring the radial runout at key cross-sections using a dial indicator. The straightness error is then indirectly inferred by observing the pointer deflection range. However, this manual inspection method has significant drawbacks. It fails to meet the precision and efficiency requirements of modern manufacturing. The reading process relies entirely on the operator's visual judgment and experience, leading to significant differences in results between different operators, poor repeatability, and a high risk of misjudgment or missed detections.

[0004] Therefore, those skilled in the art need to improve existing workpiece inspection equipment to solve the aforementioned technical problems. Utility Model Content

[0005] The main purpose of this application is to provide an automatic straightness testing instrument that automatically selects workpieces with qualified straightness during the production process, thereby avoiding errors caused by human factors.

[0006] To achieve the above objectives, in a first aspect, this application provides an automatic straightness testing instrument, including a testing unit for testing workpieces, a feeding and conveying unit disposed on one side of the testing unit for conveying workpieces, the testing unit including a rotating device for conveying workpieces, a clamping assembly disposed on the turntable for clamping workpieces, a screening device for sorting workpieces on the clamping assembly, a testing device for testing the straightness of workpieces, and a control unit for driving the screening device to screen workpieces based on the testing results of the testing unit.

[0007] Optionally, the transmission device includes a drive motor and a turntable fixedly connected to the output end of the drive motor.

[0008] Optionally, the fixture assembly includes a fixture, a receiving groove disposed on the fixture for receiving a workpiece, a positioning port disposed on the side wall of the fixture and communicating with the receiving groove, a positioning cylinder disposed on one side of the fixture, and a positioning element disposed on the positioning cylinder.

[0009] Optionally, the clamp is fixedly connected to the turntable and arranged radially along the turntable. The edges of the positioning members are all rounded. The top wall of the positioning member is inclined, and the height of the top wall near the center of the turntable is less than the height away from the center.

[0010] Optionally, the positioning element is arc-shaped on the side wall near the clamp.

[0011] Optionally, there are multiple clamping assemblies, and the multiple clamping assemblies are arranged in a circumferential array on the turntable.

[0012] Optionally, the detection unit for detecting workpieces further includes a first recycling bin and a second recycling bin disposed at the edge of the detection unit.

[0013] Optionally, there are two screening devices, with the first recycling bin and the second recycling bin corresponding to the two screening devices respectively.

[0014] Optionally, the screening device includes a lifting cylinder, a sorting cylinder disposed on the lifting cylinder, and a stop member disposed on the sorting cylinder, wherein the sorting cylinder is disposed on top of the clamping assembly.

[0015] Optionally, the feeding and conveying unit includes a feeding conveyor belt, a vibratory feeder disposed at one end of the feeding conveyor belt, a transfer table disposed on one side of the vibratory feeder, and a robotic arm disposed on one side of the transfer table.

[0016] The automatic straightness testing instrument provided by this utility model has the following advantages compared with the prior art: The automatic straightness testing instrument transfers workpieces to the testing unit via a loading transfer sheet. The transfer device in the testing unit sequentially transfers the fixture assembly to the testing device. The testing device sequentially tests the workpieces on the fixture assembly and transmits the test signals to the control unit. The control unit analyzes the test signals to obtain the test results and transmits the test results to the screening device. The screening device ejects workpieces with accurate straightness and workpieces with straightness errors respectively, realizing automatic separation of workpieces and avoiding inaccurate manual judgment. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 Yes: A schematic diagram of this automatic straightness testing instrument; Figure 2 Yes: A schematic diagram of the detection unit in this automatic straightness tester; Figure 3 Yes: A schematic diagram of the positioning cylinder in this automatic straightness testing instrument; Figure 4 Yes: A schematic diagram of the fixture structure in this automatic straightness testing instrument. The components are as follows: 1. Detection unit; 11. Transmission device; 111. Drive motor; 112. Turntable; 12. Fixture assembly; 121. Fixture; 122. Receiving slot; 123. Positioning port; 124. Positioning cylinder; 125. Positioning component; 13. Detection device; 14. Screening device; 141. Lifting cylinder; 142. Sorting cylinder; 143. Pushing component; 144. Pushing rod; 145. Pushing head; 15. Control unit; 2. Feeding and transmission unit; 21. Feeding conveyor belt; 22. Vibrating plate; 23. Transfer table; 231. Positioning slot; 24. Robotic arm; 3. First recycling bin; 4. Second recycling bin; 5. Workpiece. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] In addition, the term "multiple" should mean two or more.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figures 1-4 As shown, an automatic straightness testing instrument includes a testing unit 1 for testing workpieces, a feeding and conveying unit 2 disposed on one side of the testing unit 1 for conveying workpieces, and a first recycling bin 3 and a second recycling bin 4 disposed on the edge of the testing unit 1.

[0025] The detection unit 1 includes a transmission device 11 for detecting workpiece transmission, a clamping assembly 12 disposed on the transmission device for clamping workpiece 5, a detection device 13 for detecting the straightness of the workpiece on the clamping assembly, a screening device 14 for sorting the workpiece 5 on the clamping assembly 12, and a control unit 15 connected to the detection device 13 and the screening device 14.

[0026] The transmission device 11 includes a drive motor 111 and a turntable 112 fixedly connected to the output end of the drive motor 111. The drive motor 111 drives the turntable 112 to rotate cyclically, thereby moving the clamp assembly 12 to different workstations. The connection structure between the drive motor 111 and the turntable 112 is a prior art and will not be described in detail here.

[0027] The clamping assembly 12 includes a clamp 121 disposed on the transmission device 11, a receiving groove 122 disposed on the clamp 121 for accommodating the workpiece 5, a positioning port 123 disposed on the side wall of the clamp 121 and communicating with the receiving groove 122, a positioning cylinder 124 disposed on one side of the clamp 121, and a positioning element 125 disposed on the positioning cylinder 124.

[0028] The clamp 121 is fixedly connected to the turntable 112 and arranged radially along the turntable 112. The clamp 121 is arranged on the edge of the turntable 112 so that the robotic arm 24 can transfer the workpiece 5 to the clamp 121. The connection structure between the clamp 121 and the turntable 112 is a prior art and will not be described in detail here.

[0029] The receiving groove 122 is used to receive the workpiece 5. The outer contour of the receiving groove 122 is consistent with the outer contour of the workpiece 5, so that the position of the workpiece 5 in the receiving groove 122 is stable. One end of the receiving groove 122 is flush with one end of the fixture 121. The receiving groove 122 is a prior art and will not be described in detail here.

[0030] The positioning port 123 is located on one side edge of the receiving groove 122 and communicates with the receiving groove 122. The positioning port 123 is used to receive the positioning member 125, which is inserted into the positioning port 123 to restrict the position of the workpiece 5 in the receiving groove 122. The driving direction of the positioning cylinder 124 is perpendicular to the extension direction of the positioning port 123, so that the positioning cylinder 124 can drive the positioning member 125 to be inserted into the positioning port 123, so that one end of the positioning member 125 abuts against one side of the workpiece 5 in the receiving groove 122 to restrict the position of the workpiece 5 in the receiving groove 122.

[0031] The positioning member 125 has an arc-shaped sidewall near the clamp 121 so that its free end can fit against the edge of the workpiece 5, ensuring that the positioning member 125 stabilizes the position of the workpiece 5 within the receiving groove 122. The positioning member 125 is fixedly connected to the drive end of the positioning cylinder 124, so that the positioning cylinder 124 drives the positioning member 125 to move. The connection structure between the positioning member 125 and the positioning cylinder 124 is existing technology and will not be described in detail here.

[0032] The clamping assembly 12 comprises at least three parts. During rotation, one clamping assembly 12 receives the workpiece 5 transferred by the feeding and conveying unit 2. The other two clamping assemblies 12 correspond to the screening device 14, which transfers workpieces 5 with accurate straightness and those with straightness errors respectively, thus completing the screening of the workpieces 5. The clamping assembly 12 will be described in detail in conjunction with the screening device 14.

[0033] The detection device 13 is disposed on top of the turntable 112 in the transmission device 11, thereby facilitating the detection of the straightness of the workpiece 5. The detection device 13 is a prior art and will not be described in detail here. In this embodiment, the detection device 13 is an industrial camera used to acquire images of the surface of the workpiece 5. The images are transmitted to the control unit 15, which extracts the workpiece contour using an edge extraction algorithm, fits a reference straight line to the contour, and calculates the deviation of each contour point from the reference straight line. The detection device 13 is a prior art and will not be described in detail here.

[0034] The screening device 14 includes a lifting cylinder 141, a sorting cylinder 142 disposed on the lifting cylinder, and a stopper 143 disposed on the sorting cylinder 142. In this embodiment, the lifting cylinder 141 is disposed on the edge of the conveying device 11, and the sorting cylinder 142 is fixedly connected to the lifting cylinder 141. The lifting cylinder 141 drives the sorting cylinder 142 to rise and fall, and ensures that the sorting cylinder 142 is disposed on the top of the clamping assembly 12, so that the sorting cylinder 142 drives the stopper 143 to abut against the workpiece 5 on the clamping assembly 12. The screening device 14 screens the workpiece 5 on the clamping assembly 12 according to the signal sent by the control unit 15.

[0035] The driving direction of the sorting cylinder 142 is consistent with the transmission direction of the receiving groove 122. The sorting cylinder 142 drives the abutment 143 to move the workpiece 5 in the receiving groove 122 along the extension direction of the receiving groove 122. The connection structure between the sorting cylinder 142 and the abutment 143 is a prior art and will not be described in detail here.

[0036] The abutting member 143 includes an abutting rod 144 hinged to the sorting cylinder 142, and an abutting head 145 disposed at the free end of the abutting rod 144. One end of the abutting rod 144 is hinged to the drive end of the sorting cylinder 142, allowing the abutting rod 144 to rotate freely. Thus, when the abutting rod 144 abuts against the edge of the positioning member 125, the abutting rod 144 rotates along the edge of the positioning member 125, thereby achieving continuous transmission of the abutting rod 144. The edges of the positioning member 125 are all rounded. The top wall of the positioning member 125 is inclined. The height of the top wall near the center of the turntable 112 is less than the height away from the center. When the sorting cylinder 142 drives the abutment member 143, it slides from the center of the turntable 112 to the edge of the turntable 112. Thus, when the abutment rod 144 abuts against the top wall of the positioning member 125, it avoids jamming between the abutment rod 144 and the positioning member 125.

[0037] The abutment head 145 corresponds to the receiving groove 122. When the screening device 14 is working, the abutment head 145 abuts against one end of the workpiece 5 contained in the receiving groove 122. Thus, when the sorting cylinder 142 drives the abutment member 143 to slide, the workpiece 5 in the receiving groove 122 moves along the extension direction of the receiving groove 122.

[0038] The control unit 15 controls the screening device 14 to screen workpieces 5 based on the detection results of the detection device 13. The control unit 15 collects data from the detection device 13 to control the operation of the screening device 14. The control unit 15 is a PLC, a digital electronic device with a microprocessor, which controls mechanical equipment or production processes through program control logic. Therefore, the control unit 15 is existing technology. In this embodiment, the control scheme of the control unit 15 does not involve any technical improvements and will not be described further. The transmission device 11 sequentially transmits the clamping assembly 12 to the detection device 13. The detection device 13 transmits the detection images to the control unit 15. The control unit 15 detects the detection images and transmits the detection signals to the screening device 14. In this embodiment, there are two screening devices 14. One screening device 14 ejects workpieces 5 with accurate straightness, and the other screening device 14 ejects workpieces 5 with straightness errors. The transmission device 11 sequentially transmits the clamping assembly 12 to the positions of the two screening devices 14. The two screening devices 14 operate according to the signals from the control unit 15.

[0039] The feeding and conveying unit 2 includes a feeding conveyor belt 21, a vibratory plate 22 disposed at one end of the feeding conveyor belt, a transfer table 23 disposed on one side of the vibratory plate, and a robotic arm 24 disposed on one side of the transfer table 23.

[0040] The feeding conveyor belt 21 is a mechanical device for continuously conveying materials. It mainly consists of a belt body, a drive device, and a support structure. A motor drives the belt, chain, or other material to move, transporting items or bulk materials from the starting point to the ending point. In this embodiment, the feeding conveyor belt 21 is positioned between the previous workstation and the vibratory feeder 22. The feeding conveyor belt 21 is used to sequentially transfer the workpiece 5 from the previous workstation to the vibratory feeder 22. The feeding conveyor belt 21 is existing technology and will not be described in detail here.

[0041] The vibratory feeder 22 is an auxiliary feeding device for automatic assembly or automatic processing machinery. It can arrange various products in an orderly manner and cooperate with the detection unit 1 to complete the detection of workpiece 5. The discharge port of the vibratory feeder 22 corresponds to the transfer table 23. The vibratory feeder 22 sequentially transfers the workpieces to be detected onto the transfer table 23. The connection structure between the vibratory feeder 22 and the transfer table 23 is existing technology and will not be described in detail here.

[0042] The transfer platform 23 is provided with a positioning groove 231 for accommodating workpieces. The vibratory feeder 22 sequentially transfers the workpieces to the positioning groove 231 of the transfer platform 23, thereby limiting the position of the workpieces. The transfer platform 23 and the positioning groove 231 are both existing technologies and will not be described in detail here.

[0043] The robotic arm 24 is a mechatronic device that simulates the function of a human arm. It achieves multi-degree-of-freedom motion through programming control and is used to perform tasks such as grasping, handling, and assembly in industrial or special environments. The robotic arm 24 is a prior art technology. In this embodiment, the robotic arm 24 is positioned between the transfer platform 23 and the detection unit 1. The robotic arm 24 is used to grip the workpiece on the transfer platform 23 and place the workpiece on the clamping assembly 12. The robotic arm 24 is a prior art technology and will not be described in detail here.

[0044] The first recycling bin 3 and the second recycling bin 4 cooperate with the screening device 14. There are two screening devices 14, with the first recycling bin 3 and the second recycling bin 4 corresponding to two screening devices 14. One screening device 14 pushes the workpiece with accurate straightness into the first recycling bin 3, and the other screening device 14 pushes the workpiece with straightness error into the second recycling bin 4. The first recycling bin 3 and the second recycling bin 4 are both existing technologies and will not be described in detail here.

[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automatic straightness testing instrument, characterized in that: The device includes a detection unit for detecting workpieces, a feeding and conveying unit disposed on one side of the detection unit for conveying workpieces, the detection unit including a conveying device for detecting workpiece conveying, a clamping assembly disposed on the conveying device for clamping workpieces, a detection device for detecting the straightness of workpieces on the clamping assembly, a screening device for sorting workpieces on the clamping assembly, and a control unit connected to the detection device and the screening device. The transmission device includes a drive motor and a turntable fixedly connected to the output end of the drive motor. The fixture assembly includes a fixture, a receiving groove disposed on the fixture for receiving a workpiece, a positioning port disposed on the side wall of the fixture and communicating with the receiving groove, a positioning cylinder disposed on one side of the fixture, and a positioning element disposed on the positioning cylinder. The screening device includes a lifting cylinder, a sorting cylinder disposed on the lifting cylinder, and a stopper disposed on the sorting cylinder, wherein the sorting cylinder is disposed on the top of the clamping assembly.

2. The automatic straightness testing instrument as described in claim 1, characterized in that: The clamp is fixedly connected to the turntable and is arranged radially along the turntable. The edges of the positioning components are all rounded. The top wall of the positioning component is inclined, and the height of the top wall near the center of the turntable is less than the height away from the center.

3. The automatic straightness testing instrument as described in claim 1, characterized in that: The side wall of the positioning element near the clamp is arc-shaped.

4. The automatic straightness testing instrument as described in claim 1, characterized in that: The clamping components are multiple, and the multiple clamping components are arranged in a circumferential array on the turntable.

5. The automatic straightness testing instrument as described in claim 1, characterized in that: The detection unit for detecting workpieces also includes a first recycling bin and a second recycling bin disposed at the edge of the detection unit.

6. The automatic straightness testing instrument as described in claim 5, characterized in that: There are two screening devices, with the first recycling bin and the second recycling bin corresponding to the two screening devices respectively.

7. The automatic straightness testing instrument as described in claim 1, characterized in that: The feeding and conveying unit includes a feeding conveyor belt, a vibratory feeder at one end of the feeding conveyor belt, a transfer platform at one side of the vibratory feeder, and a robotic arm at one side of the transfer platform.

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