Thread detection device and photoelectric sensor assembly equipment
The optical fiber amplifier detects whether there are threads in the workpiece through hole, which solves the problems of low detection accuracy and low efficiency in the prior art, realizes efficient and accurate thread detection, and simplifies the detection process.
Patent Information
- Application Number
- CN202422286996.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-09-19
AI Technical Summary
In the prior art, the method of detecting whether there are threads in the circular hole of the workpiece has low accuracy and low efficiency, and is prone to damage the test tool, and has high labor cost.
A thread detection device is used to detect whether there are threads in the workpiece through holes using an optical fiber amplifier, and the existence of threads is judged by optical signals. Combined with the ratio of the incoming light amount and the output amount of the optical fiber amplifier, and a warning device is used to remind you that there are threads.
It improves the accuracy and efficiency of detection, reduces labor costs, simplifies detection steps, and saves time and space.
Smart Images
Figure CN223284391U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical processing, in particular to a thread detection device and photoelectric sensor assembly equipment with the thread detection device. Background Art
[0002] Threads are used to secure screws and are typically tapped into circular holes in workpieces. In actual production operations, threads in circular holes may be missed. Conventional methods for detecting the presence of threads in circular holes typically include visual inspection, thread gauge testing, and screw testing.
[0003] Visual inspection requires workers to use a magnifying glass or microscope to observe the inner wall of the circular hole of the workpiece to check for the shape and outline of the thread. Workers are inevitably tired and make mistakes during batch operations. This detection method has low accuracy and high labor costs. In thread gauge testing and screw testing, a thread gauge or screw that matches the thread in the circular hole of the workpiece needs to be screwed into the circular hole of the workpiece. Whether the thread gauge or screw can be smoothly screwed into the circular hole of the workpiece is determined to determine whether there is a thread in the circular hole of the workpiece. However, this type of thread gauge test or screw test is inefficient, and if there is no thread in the circular hole, it is easy to damage the thread gauge and screw used for testing. Summary of the Invention
[0004] In response to the above problems, the technical solution of the present utility model provides a thread detection device and a photoelectric sensor assembly device having the thread detection device, which can accurately and efficiently detect whether there are threads in the connecting hole of a workpiece.
[0005] The present invention provides a thread detection device for detecting the presence of threads in a through-hole of a workpiece. The thread detection device includes a fixture for positioning the workpiece and a fiber optic amplifier. The fixture is used to position the workpiece; the fiber optic amplifier is disposed at the end of the thread detection device opposite the fixture, with the input and output ends of the fiber optic amplifier facing the interior of the through-hole of the workpiece, which is secured in a predetermined position by the fixture.
[0006] According to the technical solution of the present invention, when the thread detection device detects whether there are threads in the through hole of the workpiece, the workpiece is fixed on the fixing device, and the input and output ends of the optical fiber amplifier emit optical signals to the workpiece on the fixing device and receive optical signals reflected by the workpiece. The threads of the through hole are formed by turning the inner wall of the through hole, and the inner diameter of the through hole with turned threads is larger than the inner diameter of the through hole without turning. Therefore, the amount of light entering the optical signal through the through hole with turned threads is larger than the amount of light entering the optical signal through the through hole without turning, so that it is possible to directly determine whether there are threads in the through hole of the workpiece based on the amount of light entering the optical signal received by the optical fiber amplifier. The thread detection device can simplify the detection steps, improve the detection efficiency, and save time and labor costs while ensuring the accuracy of the detection results by performing detection through optical signals.
[0007] In the technical solution of the present invention, the optical fiber amplifier in the thread detection device has a preset proportional threshold. If the ratio of the input light amount to the output light amount of the optical fiber amplifier is greater than the proportional threshold, it is judged that there is a thread in the through hole; otherwise, it is judged that no thread is formed in the through hole.
[0008] According to the technical solution of the present invention, the optical fiber amplifier can pre-detect an unthreaded through-hole to obtain the ratio of the incoming light to the outgoing light when emitting a light signal into the unthreaded through-hole, and set a ratio threshold based on the ratio. A threaded through-hole has a larger inner diameter, meaning a greater amount of incoming light. Accordingly, when the optical fiber amplifier emits the same light signal into a threaded through-hole, the ratio of the incoming light to the outgoing light is greater than the ratio threshold. Therefore, based on the ratio of the incoming light to the outgoing light and the ratio threshold, it is possible to accurately and conveniently determine whether a workpiece through-hole has threads.
[0009] Preferably, in the technical solution of the present invention, the optical fiber amplifier in the thread detection device includes a first optical fiber amplifier and a second optical fiber amplifier, the first optical fiber amplifier is arranged toward the through hole of the workpiece, and the second optical fiber amplifier is arranged toward the body of the workpiece.
[0010] According to the technical solution of the present invention, the first optical fiber amplifier is arranged toward the through hole of the workpiece to detect whether there is a thread in the through hole of the workpiece; the second optical fiber amplifier is arranged toward the main body of the workpiece to detect whether a workpiece is placed at a specified position of the fixing device.
[0011] Furthermore, in the technical solution of the present invention, the first optical fiber amplifier and the second optical fiber amplifier corresponding to the same fixing device in the thread detection device are communicatively connected.
[0012] According to the technical solution of the present invention, the second optical fiber amplifier detects whether a workpiece is placed at a specified position of the fixture and sends the detection result to the first optical fiber amplifier corresponding to the same fixture; after the first optical fiber amplifier receives the signal that a workpiece is placed at the specified position of the fixture, the first optical fiber amplifier starts to emit an optical signal to the workpiece placed on the fixture to detect whether there is a thread in the through hole of the workpiece.
[0013] Preferably, in the technical solution of the present invention, the thread detection device also includes an optical fiber fixing device, which is arranged close to the fixing device. The optical fiber fixing device is provided with a plurality of optical fiber mounting holes, and the input and output ends of the first optical fiber amplifier and the input and output ends of the second optical fiber amplifier both pass through the optical fiber mounting holes.
[0014] According to the technical solution of the present invention, the optical fiber fixing device can limit and fix the input and output ends of each optical fiber amplifier, namely the optical fiber head, to ensure that its setting position accurately corresponds to the through hole of the workpiece on the fixing device or the main body of the workpiece.
[0015] Furthermore, in the technical solution of the present invention, the thread detection device also includes a fixed guide rail, which is arranged between the optical fiber amplifier and the fixing device, and the optical fiber fixing device is movably mounted on the fixed guide rail.
[0016] According to the technical solution of the present invention, the optical fiber fixing device can move between the optical fiber amplifier and the fixing device along the fixed guide rail, that is, along the light emission direction of the optical fiber amplifier, so as to adjust the distance between the input and output ends of the optical fiber amplifier and the workpiece, thereby facilitating the dimming correction of the optical fiber amplifier.
[0017] In the technical solution of the present invention, the thread detection device also includes an alarm device, which is communicatively connected to the optical fiber amplifier. When the thread detection device detects that there is no thread in the through hole of the workpiece, the alarm device reminds the operator that the workpiece is unqualified by means of sound signals, light signals, etc.
[0018] The technical solution of the present invention further provides a photoelectric sensor assembly device having the above-mentioned thread detection device for detecting whether there is a thread in the connecting hole of the photoelectric sensor.
[0019] Preferably, in the technical solution of the present invention, the photoelectric sensor assembly equipment further comprises a welding device for welding the workpiece fixed on the fixing device.
[0020] According to the technical solution of the present utility model, the photoelectric sensor assembly equipment not only detects whether the connection hole of the photoelectric sensor has threads, but also uses a fixture that serves as a receiving platform for the welding cable. After the inspection is completed, the cable welding to the workpiece can be completed directly on the fixture. By combining the threaded hole inspection step with the cable welding step in the photoelectric sensor production process, it can save space and time costs in the production process.
[0021] In the technical solution of the present utility model, the workpiece is a semi-finished assembly product of the photoelectric sensor. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of a thread detection device provided in an embodiment of the present utility model.
[0023] Figure 2 It is a schematic diagram of a workpiece provided in an embodiment of the present utility model.
[0024] Figure 3 It is a three-dimensional diagram of a thread detection device provided in an embodiment of the present utility model.
[0025] Explanation of the accompanying drawings: 100-workpiece, 101-through hole, 1-thread detection device, 2-fixing device, 3-optical fiber amplifier, 30-input and output ends, 31-first optical fiber amplifier, 32-second optical fiber amplifier, 33-first optical fiber amplifier, 34-first optical fiber amplifier, 35-second optical fiber amplifier, 36-first optical fiber amplifier, 4-optical fiber fixing device, 41-optical fiber mounting hole, 5-alarm device. DETAILED DESCRIPTION
[0026] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.
[0027] Figure 1 It is a schematic diagram of a thread detection device provided in an embodiment of the present utility model.
[0028] Figure 2 It is a schematic diagram of a workpiece provided in an embodiment of the present utility model.
[0029] like Figure 1 As shown, in an embodiment of the present invention, a thread detection device 1 is provided, which includes a fixing device 2, an optical fiber amplifier 3, an optical fiber fixing device 4 and an alarm device 5.
[0030] like Figure 2 As shown, the workpiece 100 in this embodiment is a photoelectric sensor component, generally rectangular in shape. Workpiece 100 has a through hole 101 at each end. Through holes 101 are threaded to facilitate the installation and fixation of the photoelectric sensor. The threads within through holes 101 are formed by turning the inner sidewalls of through holes 101. The inner diameter of the threaded through hole 101 is larger than the inner diameter of the unthreaded through hole 101. The thread detection device 1 is used to detect whether through holes 101 in a workpiece 100 have threads.
[0031] refer to Figure 1 and Figure 2 In this embodiment, the thread detection device 1 is provided with two fixtures 2, arranged side by side at one end of the thread detection device 1. Each fixture 2 can fix a workpiece 100 in a specified position. Six fiber amplifiers 3 are arranged at the other end of the thread detection device 1 opposite the fixtures 2, so that the fiber amplifiers 3 and the workpiece 100 are arranged opposite each other in the direction of light emission from the fiber amplifiers 3.
[0032] Preferably, in this embodiment, the six fiber amplifiers 3 include four first fiber amplifiers, namely, a first fiber amplifier 31, a first fiber amplifier 33, a first fiber amplifier 34, and a first fiber amplifier 36, and two second fiber amplifiers, namely, a second fiber amplifier 32 and a second fiber amplifier 35. The first fiber amplifiers 31, 33, 34, and 36 are positioned toward the through hole 101 of the workpiece 100 and are used to detect whether the through hole 101 of the workpiece 100 contains threads. The second fiber amplifiers 32 and 35 are positioned toward the body of the workpiece 100 and are used to detect whether the workpiece 100 is placed at a specified position on the fixture 2.
[0033] Specifically, in this embodiment, the first optical fiber amplifier 31, the second optical fiber amplifier 32 and the first optical fiber amplifier 33 correspond to the first workpiece 100 ( Figure 1 The first fiber amplifier 31 and the first fiber amplifier 33 are respectively arranged toward the two through holes 101 of the first workpiece 100, and the second fiber amplifier 32 is arranged toward the main body of the first workpiece 100. The first fiber amplifier 34, the second fiber amplifier 35 and the first fiber amplifier 36 correspond to the second workpiece 100 ( Figure 1The first fiber amplifier 34 and the first fiber amplifier 36 are respectively positioned toward the two through-holes 101 of the second workpiece 100, while the second fiber amplifier 35 is positioned toward the main body of the second workpiece 100. The first and second fiber amplifiers corresponding to the same fixture 2, and therefore the same workpiece 100, are communicatively connected. Specifically, the first fiber amplifier 31 and the first fiber amplifier 33 are respectively communicatively connected to the second fiber amplifier 32; and the first fiber amplifier 34 and the first fiber amplifier 36 are respectively communicatively connected to the second fiber amplifier 35. It is worth noting that the communication connection between the fiber amplifiers 3 can be either direct or indirect via a module such as a control chip.
[0034] Figure 3 It is a three-dimensional diagram of a thread detection device 1 provided in an embodiment of the present utility model.
[0035] like Figure 3 As shown, in this embodiment, a fiber fixture 4 is positioned adjacent to the fixture 2 and defines six fiber mounting holes 41. The input and output ends 30, i.e., fiber tips, of the six fiber amplifiers 3 are positioned through the fiber mounting holes 41. The input and output ends 30, i.e., fiber tips, of the first fiber amplifiers 31, 33, 34, and 36 are positioned toward the interior of the through-hole 101 of the workpiece 100 secured in a predetermined position by the fixture 2, while the input and output ends 30, i.e., fiber tips, of the second fiber amplifiers 32 and 35 are positioned toward the main body of the workpiece 100 secured in a predetermined position by the fixture 2. The fiber fixture 4 can positionally secure the input and output ends 30, i.e., fiber tips, of each fiber amplifier 3, ensuring that their positions accurately correspond to the through-hole 101 or the main body of the workpiece 100 on the fixture 2. Both the output and input fibers of the fiber amplifiers 3 are integrated into the input and output ends 30.
[0036] Furthermore, in this embodiment, the thread detection device 1 further includes a fixed guide rail (not shown) disposed between the optical fiber amplifier 3 and the fixture 2, along the light emission direction of the optical fiber amplifier 3. The optical fiber fixture 4 is movably mounted on the fixed guide rail. The optical fiber fixture 4 can move along the fixed guide rail, i.e., along the light emission direction of the optical fiber amplifier 3, between the optical fiber amplifier 3 and the fixture 2, thereby adjusting the distance between the input and output ends 30 of the optical fiber amplifier 3 and the workpiece 100, thereby facilitating dimming and calibration of the optical fiber amplifier 3.
[0037] In this embodiment, the alarm device 5 is communicatively connected to the optical fiber amplifier 3. When the thread detection device 1 detects that there is no thread in the through hole 101 of the workpiece 100, the alarm device 5 can be provided with a combination of one or more devices such as a buzzer and an LED light to remind the operator that the workpiece 100 is unqualified by means of sound signals, light signals, etc.
[0038] In an embodiment of the present invention, when detecting whether a workpiece 100 has threads in its through hole 101, the thread detection device 1 first secures the workpiece 100 to the fixture 2. The second fiber amplifier 32 and the second fiber amplifier 35 detect in real time whether the workpiece 100 is placed at the designated position of their corresponding fixture 2, and transmit the detection results to the first fiber amplifiers 31 and 33 (or first fiber amplifiers 34 and 36) corresponding to the same fixture 2. If the second fiber amplifier 32 detects that a workpiece 100 is placed at the designated position of its corresponding fixture 2, the corresponding first fiber amplifiers 31 and 33, upon receiving this signal, begin emitting optical signals to the workpiece 100 placed on the fixture 2 and receiving return optical signals, thereby detecting whether the through hole 101 of the workpiece 100 has threads.
[0039] Because the inner diameter of the threaded through hole 101 is larger than that of the unthreaded through hole 101, the amount of light entering the threaded through hole 101 is greater than that entering the unthreaded through hole 101. Therefore, the presence of threads in the through hole 101 of the workpiece 100 can be directly determined based on the amount of light received by the optical fiber amplifier 3. The thread detection device 1, which uses optical signals for detection, simplifies the detection process, improves detection efficiency, and saves time and labor costs while ensuring the accuracy of the detection results.
[0040] Preferably, in an embodiment of the present invention, the optical fiber amplifier 3 in the thread detection device 1 has a preset proportional threshold. If the ratio of the input light amount to the output light amount of the optical fiber amplifier 3 is greater than the proportional threshold, it is judged that there is a thread in the through hole 101; otherwise, it is judged that there is no thread in the through hole 101.
[0041] In the embodiment of the present invention, the ratio threshold value can be tested and set according to conditions such as the material of the workpiece 100, the shape and size of the through hole 101, and the standard specifications of the thread. For example, the optical fiber amplifier 3 can be pre-tested on the through hole 101 without turning threads to obtain the ratio of the amount of light entering and the amount of light exiting when emitting an optical signal to the through hole 101 without turning threads, and the ratio threshold value can be set accordingly. The inner diameter of the through hole 101 with turning threads is larger, that is, the amount of light entering is larger. Accordingly, when the optical fiber amplifier 3 emits the same optical signal to the through hole 101 with threads, the ratio of the amount of light entering and the amount of light exiting is greater than the ratio threshold value. Therefore, it is possible to accurately and conveniently determine whether there is a thread in the through hole 101 of the workpiece 100 based on the ratio of the amount of light entering and the amount of light exiting and the ratio threshold value.
[0042] It is worth noting that in this embodiment, the technical solution of the present invention is illustrated by the detection mode of the optical fiber amplifier 3 detecting the amount of incoming and outgoing light. In other applications of the present invention, the optical fiber amplifier 3 can also be replaced with an optical signal detection device such as a photoelectric sensor. The optical signal detection device can measure the input and output light intensity, spot size, etc. to determine whether the through hole 101 of the workpiece 100 has a thread, without limitation here.
[0043] In an embodiment of the present invention, a photoelectric sensor assembly device is also provided, which has the above-mentioned thread detection device 1 for detecting whether there are threads in the connecting hole of the workpiece 100, wherein the workpiece 100 is a semi-finished assembly product of the photoelectric sensor.
[0044] Preferably, in an embodiment of the present invention, the photoelectric sensor assembly equipment further includes a welding device for performing cable welding on the workpiece 100 secured to the fixture 2 in the thread detection device 1. This photoelectric sensor assembly equipment is capable of not only detecting the presence of threads in the photoelectric sensor's connection hole, but also serves as a receiving platform for the cable welding. After the inspection is complete, the cable welding to the workpiece 100 is completed directly on the fixture 2. Combining the threaded hole detection step with the cable welding step during the photoelectric sensor production process can save space and time during production.
[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A thread detection device for detecting whether there is a thread in a through hole of a workpiece, characterized in that: include: a fixing device, provided at one end of the thread detection device, for fixing the workpiece; An optical fiber amplifier is provided at the other end of the thread detection device opposite to the fixing device, and the input and output ends of the optical fiber amplifier are arranged toward the inside of the through hole of the workpiece fixed at a specified position by the fixing device.
2. The thread detection device according to claim 1, characterized in that: The optical fiber amplifier has a preset ratio threshold. If the ratio of the input light amount to the output light amount of the optical fiber amplifier is greater than the ratio threshold, it is determined that the through hole has the thread; otherwise, it is determined that the through hole does not have the thread.
3. The thread detection device according to claim 1, characterized in that: The optical fiber amplifier includes a first optical fiber amplifier and a second optical fiber amplifier. The first optical fiber amplifier is arranged toward the through hole of the workpiece, and the second optical fiber amplifier is arranged toward the main body of the workpiece.
4. The thread detection device according to claim 3, characterized in that: The first optical fiber amplifier and the second optical fiber amplifier corresponding to the same fixing device are communicatively connected.
5. The thread detection device according to claim 4, characterized in that: It also includes an optical fiber fixing device, which is arranged near the fixing device. The optical fiber fixing device is provided with a plurality of optical fiber installation holes, and the input and output ends of the first optical fiber amplifier and the input and output ends of the second optical fiber amplifier both pass through the optical fiber installation holes.
6. The thread detection device according to claim 1, wherein: It also includes an alarm device, which is communicatively connected to the optical fiber amplifier.
7. The thread detection device according to claim 5, characterized in that: It also includes a fixed guide rail, which is arranged between the optical fiber amplifier and the fixing device, and the optical fiber fixing device is movably installed on the fixed guide rail.
8. A photoelectric sensor assembly device, characterized in that: A thread detection device according to any one of claims 1 to 7.
9. The photoelectric sensor assembly equipment according to claim 8, wherein: It also includes a welding device for welding the workpiece fixed on the fixing device.
10. The photoelectric sensor assembly equipment according to claim 8, wherein The workpiece is a semi-finished assembly product of a photoelectric sensor.