Device for detecting hole of precision part with hole

Abstract

The utility model discloses a device for detecting a hole of a precision part with a hole, and belongs to the technical field of size detection of precision parts. The test bench is arranged on the pressure sensor, and the test bench is provided with a test shaft; the pressing plate is arranged above the test shaft; the pressing plate is connected to the lifting mechanism, and when the hole of the precision part with the hole is aligned with the testing shaft, the lifting mechanism descends to apply pressure to the precision part with the hole through the pressing plate, so that the precision part with the hole is pressed to the testing table along the testing shaft; and the pressure sensor is used for sensing the friction force between the precision part with the hole and the test shaft. According to the device for detecting the hole of the precision part with the hole, whether the size of the hole of the precision part with the hole is qualified or not can be judged simply by detecting the friction force between the precision part with the hole and the test shaft when the precision part with the hole is pressed to the test shaft, so that the detection efficiency is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of measuring and testing equipment, and more specifically, to the technical field of dimension detection of precision parts. Background Art

[0002] Many precision parts in the medical industry are very small in size. For example, the size of the camera used in the ultra-fine endoscope is only about 1mm, so the processing accuracy requirements for the matching perforated parts (such as the front end or the tip end) are very high. When the same batch of perforated parts has size deviations and fails, the traditional manual measurement method for large-scale incoming material inspection has the problems of low efficiency, long time consumption and susceptibility to human errors. Summary of the invention

[0003] The purpose of the present application is to overcome the deficiencies in the prior art and to provide a device for detecting holes in precision parts with holes.

[0004] In order to achieve the above objectives, the technical solution provided by this application is:

[0005] A device for detecting the hole of a precision part with a hole, comprising: a pressure sensor; a test bench, the test bench is placed on the pressure sensor, and the test bench is provided with a test axis; a pressure plate, the pressure plate is arranged above the test axis; and a lifting mechanism, the pressure plate is connected to the lifting mechanism, wherein when the hole of the precision part with a hole is aligned with the test axis, the lifting mechanism is lowered to apply pressure to the precision part with a hole through the pressure plate, so that the precision part with a hole is pressed onto the test bench along the test axis, and the friction between the precision part with a hole and the test axis is sensed by the pressure sensor.

[0006] Furthermore, the size and cross-sectional shape of the hole of the precision part with a hole are matched with the size and cross-sectional shape of the test shaft of the test bench.

[0007] Furthermore, the device for detecting holes of precision parts with holes also includes a fixed base, and the pressure sensor is arranged on the fixed base.

[0008] Further, the fixed base includes one or more pillars, one or more threaded holes are provided on the test bench, and one or more corresponding threaded holes are provided on the one or more pillars, and the test bench is detachably mounted to the fixed base by a screw via the one or more threaded holes of the test bench and the corresponding one or more threaded holes of the one or more pillars, wherein the pressure sensor is arranged below the one or more pillars and connected to the one or more pillars.

[0009] Furthermore, the lifting mechanism and the fixed base are integrally formed.

[0010] Furthermore, the device for detecting holes in precision parts with holes also includes a signal processing element and a display device arranged in the fixed base, and the signal processing element communicates with the pressure sensor and the display device, and is used to process the pressure signal generated by the pressure sensor to generate pressure data, and transmit the pressure data to the display device.

[0011] Furthermore, the signal processing element is integrated into the pressure sensor or the display device.

[0012] Furthermore, the display device includes one or more of the following buttons: a power on / off button, a zero adjustment button, a peak value recording button, a peak value alarm start button, and a mute button.

[0013] Furthermore, one or more of the power on / off button, the zeroing button, the peak value recording button, the peak value alarm start button and the mute button are physical buttons or virtual buttons.

[0014] Compared with the prior art, the technical solution provided by this application has the following beneficial effects:

[0015] By using the device for detecting holes of precision parts with holes according to the present application, the detection efficiency is greatly improved, and at the same time, the tightness of the parts fit can be quantified, providing data support for designers in the design process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view of various components of the device for detecting holes of precision parts with holes according to the present application, wherein the test bench is in a separated state from the fixed base, the precision parts with holes are located directly above the test axis of the test bench, and the pressure plate has not yet applied pressure;

[0017] Figure 2 It is another front view of the various components of the device for detecting holes of precision parts with holes according to the present application, wherein the test bench and the fixed base are in a fixed state, and the pressure plate has pressed the precision parts with holes onto the test axis of the test bench.

[0018] Explanation of the symbols in the schematic diagram:

[0019] 1. Fixed base; 2. Test bench; 3. Test shaft; 4. Precision parts with holes; 5. Lifting mechanism; 6. Press plate; 7. Display device DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. It should be noted that the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0021] The device for detecting the hole of the precision part 4 with a hole according to the present application includes a pressure sensor (not shown); a test bench 2, the test bench 2 is placed on the pressure sensor, and the test bench 2 is provided with a test shaft 3; a pressing plate 6, the pressing plate 6 is arranged above the test shaft 3; and a lifting mechanism 5, the pressing plate 6 is connected to the lifting mechanism 5, wherein when the hole of the precision part 4 with a hole is aligned with the test shaft 3, the lifting mechanism 5 is lowered to apply pressure to the precision part 4 with a hole through the pressing plate 6, so that the precision part 4 with a hole is pressed onto the test bench along the test shaft 3, during which the friction between the precision part 4 with a hole and the test shaft 3 is sensed by the pressure sensor. When the friction sensed by the pressure sensor is greater than a certain threshold, the precision part 4 with a hole is judged to be unqualified; when the friction sensed by the pressure sensor is not greater than a certain threshold, the precision part 4 with a hole is judged to be qualified. In the context of a front end head for an ultra-thin endoscope having a hole with an aperture of about 1 mm, the threshold is 0.8N.

[0022] It should be noted that the alignment of the hole of the precision part 4 with the test shaft 3 can be manually performed by an operator using tools such as tweezers, or by automated equipment such as a robotic arm. Since the gap between the hole of the precision part 4 with a hole and the test shaft 3 is very small, the alignment of the hole of the precision part 4 with a hole and the test shaft 3 should be close to complete alignment, otherwise the precision part with a hole will be stuck. If the force sensed by the pressure sensor when the pressure plate 6 applies pressure to the precision part 4 with a hole is greater than the set threshold due to the misalignment of the hole of the precision part 4 with the test shaft 3, the precision part 4 with a hole can be judged to be unqualified, because misalignment is a low-probability event in the detection process as a whole, and one or several false detection events are acceptable for the detection of a whole batch of materials.

[0023] In one embodiment of the present application, the device for detecting the hole of the precision part 4 with a hole according to the present application may further include a fixed base 1, and the pressure sensor may be arranged on the fixed base 1. Figure 1 As shown in Figure 1 It is a front view of the various components of the device for detecting the hole of the precision part 4 with a hole according to the present application, wherein the test table 2 is separated from the fixed base 1. By providing the fixed base 1, the test table 2 can be placed on the fixed base 1 to facilitate the test operation, and the fixed base 1 is also beneficial to the setting of the lifting mechanism 5, as described later.

[0024] In one embodiment of the present application, the fixed base 1 may include one or more pillars, one or more threaded holes may be provided on the test bench 2, and one or more corresponding threaded holes may be provided on the one or more pillars, and the test bench 2 may be detachably mounted to the fixed base 1 by a screw through one or more threaded holes of the test bench 2 and one or more corresponding threaded holes of the one or more pillars, thereby facilitating subsequent testing operations. In this embodiment, a pressure sensor may be disposed below the one or more pillars and connected to the one or more pillars, and examples of the pressure sensor include a piezoresistive sensor, a piezoelectric sensor, a capacitive sensor, and the like.

[0025] It should be noted that the threaded connection is only one example of a detachable connection between the test bench 2 and the fixed base 1, and there may be other detachable connection methods between the test bench 2 and the fixed base 1, such as snap connection, latch connection, magnetic connection, bonding, etc. Due to the detachable connection between the test bench 2 and the fixed base 1, when the hole of the precision part 4 with a hole is changed, the test shaft 3 of the test bench 2 can be replaced accordingly.

[0026] In one embodiment of the present application, the size and cross-sectional shape of the hole of the precision part 4 with a hole are adapted to the size and cross-sectional shape of the test shaft 3 of the test bench 2, that is, the hole of the precision part 4 with a hole is one-to-one corresponding to the test shaft 3 of the test bench 2, and preferably, the height of the test shaft 3 of the test bench 2 can be configured to basically pass through the hole of the precision part 4 with a hole.

[0027] Still viewing Figure 1 , it can be seen that the precision part 4 with a hole is now located directly above the test axis 3 of the test bench 2, and the pressure plate 6 has not yet applied pressure. When the hole of the precision part 4 with a hole is roughly completely aligned with the test axis 3, pressure is applied to the precision part 4 with a hole by the pressure plate 6 to press the precision part 4 with a hole onto the test bench 2 along the test axis 3, and the friction between the precision part 4 with a hole and the test axis 3 during this process is sensed by the pressure sensor. In various embodiments, the time for the pressure plate 6 to apply force can be determined by an operator, or automatically determined by an automated device with machine vision.

[0028] In one embodiment of the present application, the lifting mechanism 5 can be formed integrally with the fixed base 1. In the process of testing the hole of the precision part with a hole, since the hole of the precision part with a hole 4 needs to be aligned with the test axis 3 first, the pressing plate 6 will not apply downward pressure until the hole is roughly completely aligned. Therefore, once a slight displacement occurs between the lifting mechanism 5 and the fixed base 1, the precision part with a hole 4 will be pressed off or the force applied to it will be uneven. This situation is particularly obvious when the force is applied by the operator. Therefore, forming the lifting mechanism 5 integrally with the fixed base 1 can avoid displacement between the lifting mechanism 5 and the fixed base 1.

[0029] The lifting mechanism 5 may include a spring lifting mechanism 5, a hydraulic lifting mechanism 5, etc. The lifting and lowering of the lifting mechanism 5 may be performed manually by an operator, or automatically by an automated device having a mechanical arm and machine vision.

[0030] The pressing plate 6 is generally a flat metal plate or a plate made of a special material, which has sufficient strength and rigidity to withstand the applied pressure. The pressing plate 6 can be connected to the lifting mechanism 5. Optionally, the portion where the pressing plate 6 contacts the precision part with holes 4 can be equipped with a soft pad or a special pad to disperse the pressure and protect the surface of the precision part with holes from damage.

[0031] In one embodiment of the present application, the device for detecting holes in a precision part 4 with holes according to the present application may also include a signal processing element (not shown) and a display device 7 arranged in a fixed base 1, wherein the signal processing element communicates with the pressure sensor and the display device 7, and is used to process the pressure signal generated by the pressure sensor to generate pressure data, and transmit the pressure data to the display device 7, which can then display the pressure data.

[0032] The signal processing element may include one or more of the following: a signal amplifier, an analog-to-digital converter, a signal filter, a microcontroller, and a communication interface, etc. The pressure signal sensed by the pressure sensor may be amplified to a suitable range by the signal amplifier, and then the amplified pressure signal may be converted into a digital signal by the analog-to-digital converter, and then the noise in the digital signal may be removed by the signal filter, the microcontroller receives the filtered digital signal, and performs necessary calculations and corrections to generate pressure data, and finally transmits the pressure data to the display device 7 through the communication interface for display.

[0033] In one embodiment of the present application, the signal processing element can be integrated into the pressure sensor or the display device 7. Integrating the signal processing element with the pressure sensor or the display device 7 can simplify wiring by reducing the number of connections between the various devices, and reduce the risk of failure due to poor contact by reducing the number of connectors. In addition, integrating the signal processing element with the pressure sensor or the display device 7 can better optimize the management of power consumption.

[0034] The communication between the signal processing element and the pressure sensor and the display device 7 may include wired communication or wireless communication or any combination thereof, wherein wired communication includes cables or optical fibers, etc., and wireless communication includes Wi-Fi, cellular, infrared, Bluetooth, and radio frequency, etc.

[0035] In one embodiment of the present application, the display device 7 further includes one or more of the following buttons: a power button, a zeroing button, a peak recording button, a peak alarm button, and a mute button. Optionally, the display device 7 further includes a speaker and a vibrator. The power button is used to power on and off the device for detecting holes in precision parts 4 with holes of the present application; the zeroing button is used to adjust the reading sensed by the pressure sensor to zero to ensure the accuracy and reliability of the measurement results; the peak recording button is used to record the peak friction force sensed by the pressure sensor during the process of the pressure plate 6 applying force to the precision parts 4 with holes. Optionally, this peak friction force can be recorded for subsequent analysis; the peak alarm button is used to sound an alarm when the friction force sensed by the pressure sensor is greater than a specific threshold value. The alarm can be issued in the form of visual or audible sound or vibration; the mute button is used to turn off the volume of the device for detecting holes in precision parts 4 with holes.

[0036] In one embodiment of the present application, one or more of the above buttons may be physical buttons or virtual buttons. That is, when the display device 7 is a touch screen, one or more of the above buttons may be set on the touch screen. Physical buttons may be more intuitive, have tactile feedback, and have better reliability and durability, while virtual buttons may be implemented through software programming, and the layout and functions may be easily modified to adapt to different application scenarios. Moreover, virtual buttons do not require physical space, which may make the entire device more compact. In addition, the layout and functions of the buttons may be adjusted according to the user's preferences or needs.

[0037] In summary, the device for detecting the hole of the precision part 4 with a hole according to the present application can simply determine whether the size of the hole of the precision part 4 with a hole is qualified by detecting the friction between the precision part 4 with a hole and the test shaft 3 when the precision part 4 with a hole is pressed onto the test shaft 3. This can greatly improve the detection efficiency in the case of large-scale incoming material inspection. Moreover, during the test process, the tightness of the fit between the precision part 4 with a hole and the test shaft 3 can be quantified, providing data support for the designers of the precision part 4 with a hole in the design process.

[0038] The above schematically describes the present application and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and, without departing from the purpose of the present application, designs a structure and an embodiment similar to the technical solution without creativity, they shall all fall within the protection scope of the present application.

Claims

1. A device for detecting holes of precision parts with holes, characterized in that: include: Pressure sensor; A test bench (2), the test bench (2) being placed on the pressure sensor, and the test bench (2) being provided with a test axis (3); a pressing plate (6), the pressing plate (6) being arranged above the test shaft (3); and A lifting mechanism (5), wherein the pressing plate (6) is connected to the lifting mechanism (5), When the hole of the precision part with a hole is aligned with the test axis (3), the lifting mechanism (5) is lowered to apply pressure to the precision part with a hole through the pressure plate (6), so that the precision part with a hole is pressed onto the test bench (2) along the test axis (3), and the friction force between the precision part with a hole and the test axis (3) is sensed by the pressure sensor.

2. The device for detecting holes of precision parts with holes according to claim 1, characterized in that: The size and cross-sectional shape of the hole of the precision part with a hole are matched with the size and cross-sectional shape of the test shaft (3) of the test bench (2).

3. The device for detecting holes of precision parts with holes according to claim 2, characterized in that: It also comprises a fixed base (1), and the pressure sensor is arranged on the fixed base (1).

4. The device for detecting holes of precision parts with holes according to claim 3, characterized in that: The fixed base (1) includes one or more pillars, one or more threaded holes are provided on the test bench (2), and one or more corresponding threaded holes are provided on the one or more pillars, and the test bench (2) is detachably mounted to the fixed base (1) by means of a screw via the one or more threaded holes of the test bench (2) and the corresponding one or more threaded holes of the one or more pillars, wherein the pressure sensor is arranged below the one or more pillars and connected to the one or more pillars.

5. The device for detecting holes of precision parts with holes according to claim 4, characterized in that: The lifting mechanism (5) and the fixed base (1) are integrally formed.

6. The device for detecting holes of precision parts with holes according to claim 5, characterized in that: It also includes a signal processing element and a display device (7) arranged in the fixed base, wherein the signal processing element communicates with the pressure sensor and the display device (7) and is used to process the pressure signal generated by the pressure sensor to generate pressure data, and transmit the pressure data to the display device (7).

7. The device for detecting holes of precision parts with holes according to claim 6, characterized in that: The signal processing element is integrated in the pressure sensor or the display device (7).

8. The device for detecting holes of precision parts with holes according to claim 7, characterized in that: The display device (7) comprises one or more of the following buttons: a power on / off button, a zero adjustment button, a peak value recording button, a peak value alarm start button and a mute button.

9. The device for detecting holes of precision parts with holes according to claim 8, characterized in that: One or more of the power on / off button, the zero adjustment button, the peak value recording button, the peak value alarm start button and the mute button are physical buttons or virtual buttons.

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