Part inner hole size detection equipment based on air pressure value

Abstract

The utility model discloses an air pressure value-based part bore size detection device, which comprises a support, a workpiece seat, an air needle, a first actuator and a second actuator, the first actuator and the second actuator are arranged on the support, the workpiece seat is arranged on the first actuator, the air needle is arranged on the second actuator, and the first actuator and the second actuator are arranged on the support. The first actuator drives the workpiece seat to move to a detection position, the second actuator drives the air needle to move up and down, the air needle is connected with the first sensor and the pressure stabilizing assembly, the pressure stabilizing assembly is used for providing an air source for stabilizing pressure, and the first sensor is used for measuring a current air pressure value; at least two air outlet holes are formed in the side wall of the air needle at equal intervals; a station matched with a part is arranged on the upper surface of the workpiece seat, and a clearance groove which is opened in the circumferential direction is concavely formed in the station; by arranging the air needle, the size of the inner hole is determined according to an air pressure value, the detection efficiency is greatly improved, and the detection precision is high. The gas needle and the workpiece base are provided with protection assemblies, and equipment damage caused by dislocation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of parts inspection equipment, and in particular to a device for inspecting the inner hole size of parts based on air pressure values. Background Technology

[0002] Automotive parts are precision components, therefore, they have high dimensional requirements. For small internal holes, there are two conventional inspection methods. The first is to use go / no-go gauges to check the dimensions of the internal holes; however, the accuracy of go / no-go gauges is low and cannot meet the requirements of automotive parts. The second method is to acquire images using a high-definition camera and compare them with a computer; however, this method is highly dependent on the environment and is subject to significant interference factors. Even slight deviations can affect the inspection results and cause false positives. Utility Model Content

[0003] To address the shortcomings of existing technologies, the main objective of this invention is to overcome these deficiencies by disclosing a device for detecting the inner diameter of a part based on air pressure. The device includes a support, a workpiece seat, an air needle, a first actuator, and a second actuator. The first and second actuators are mounted on the support, the workpiece seat is mounted on the first actuator, and the air needle is mounted on the second actuator. The first actuator drives the workpiece seat to a detection position, and the second actuator drives the air needle to move up and down. The air needle is connected to a first sensor and a pressure stabilizing component, which provides a stable air pressure source. The first sensor measures the current air pressure value. At least two air outlets are evenly spaced on the sidewall of the air needle. The upper surface of the workpiece seat has a work station for cooperating with the part, and the work station has a circumferentially open clearance groove.

[0004] Furthermore, the first actuator is a pneumatic cylinder, and the second actuator is an electric cylinder.

[0005] Furthermore, the air needle is mounted on the second actuator via a first protective assembly; the first protective assembly includes a first fixed base, a first spring, and a floating rod. The floating rod is vertically floating on the first fixed base, and the first spring is mounted on the floating rod, providing a downward thrust to the floating rod. The floating rod has an axially extending air passage, the air needle is mounted on the lower end of the floating rod, and the upper end of the floating rod is connected to the first sensor.

[0006] Furthermore, a vertically penetrating first guide hole is provided on the first fixed base, the floating rod is slidably disposed in the first guide hole, a limiting nut is provided at the upper end of the floating rod, a limiting edge is provided at the lower end of the floating rod, and the two ends of the first spring act on the limiting edge and the first fixed base.

[0007] Furthermore, an adjustment component is provided on the second actuator, and the air needle is disposed on the adjustment component, thereby adjusting the horizontal position of the air needle using the adjustment component.

[0008] Furthermore, the adjustment assembly includes a second fixed base, a first adjustment block, and a second adjustment block. The second fixed base is disposed on the second actuator and has a first oblong hole along the X-axis. The first adjustment block is disposed on the second fixed base and fixed to the first oblong hole by screws. The second adjustment block has a second oblong hole along the Y-axis and is disposed on the first adjustment block. Screws pass through the second oblong hole to fix the first adjustment block and the second adjustment block. The air needle is connected to the second adjustment block.

[0009] Furthermore, a fixing plate is provided on the side of the second fixing base, and a first adjusting screw is provided on the fixing plate. The first adjusting screw acts on the first adjusting block and pushes the first adjusting block to move along the X-axis. An adjusting screw hole is provided on the second adjusting block, and a second adjusting screw is provided on the adjusting screw hole. One end of the second adjusting screw acts on the second fixing base and pushes the second adjusting block to move along the Y-axis.

[0010] Furthermore, the first actuator is mounted on the bracket via an adjustment plate. The adjustment plate has third oblong holes on both sides of its surface. The adjustment plate is fixed to the bracket with screws, and the position of the adjustment plate in the Z-axis direction is adjusted using the third oblong holes.

[0011] Furthermore, the workpiece seat is mounted on the first actuator via a second protective assembly. The second protective assembly includes a third fixed seat, a first limiting block, a second limiting block, and a second spring. The third fixed seat is mounted on the first actuator and has a second guide hole that mates with the workpiece seat. The first limiting block and the second limiting block are located at the lower end and middle of the workpiece seat, respectively. The second spring is mounted on the workpiece seat and provides an upward thrust to the workpiece seat.

[0012] Furthermore, an axial exhaust channel is provided between two adjacent air outlets.

[0013] The beneficial effects achieved by this utility model are:

[0014] This invention significantly improves detection efficiency and accuracy by using an air needle to determine the inner hole size based on air pressure. Both the air needle and the workpiece holder are equipped with protective components to prevent misalignment and equipment damage. The air needle's outlet has circumferentially designed air channels to facilitate gas discharge and further enhance detection accuracy. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a part inner hole size detection device based on air pressure value according to this utility model;

[0016] Figure 2 This is a schematic diagram showing the interaction between the second actuator, the adjustment component, and the first protection component;

[0017] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0018] Figure 4 A cross-sectional view of the second actuator, the adjustment assembly, and the first protection assembly;

[0019] Figure 5 To adjust the exploded view of the components;

[0020] Figure 6 A schematic diagram showing the interaction between the first actuator, the workpiece holder, and the second protective assembly;

[0021] Figure 7 for Figure 6 Enlarged view of A in the middle;

[0022] The attached figures are labeled as follows:

[0023] 1. Bracket, 2. Workpiece seat, 3. Air needle, 4. First actuator, 5. Second actuator, 6. First sensor, 7. First protection component, 8. Adjustment component, 9. Second protection component, 11. Adjustment plate, 12. Third oblong hole, 21. Station, 22. Clearance groove, 31. Air outlet, 32. Exhaust duct, 71. First fixed seat, 72. Second spring, 73. Floating rod, 74. Limit nut, 75. Second sensor, 731. Air passage, 732. Limit edge, 81. Second fixed seat, 82. First adjusting block, 83. Second adjusting block, 84. Fixed plate, 85. First adjusting screw, 86. Second adjusting screw, 811. First oblong hole, 831. Second oblong hole, 91. Third fixed seat, 92. First limit block, 93. Second limit block, 94. Second spring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] A method for detecting the inner hole size of a part based on air pressure values ​​uses the following detection mechanism: the detection mechanism includes a support 1, a workpiece seat 2, an air needle 3, a first actuator 4, and a second actuator 5. The first actuator 4 and the second actuator 5 are mounted on the support 1, the workpiece seat 2 is mounted on the first actuator 4, and the air needle 3 is mounted on the second actuator 5. The first actuator 4 drives the workpiece seat 2 to move to the detection position, and the second actuator 5 drives the air needle 3 to move up and down. The air needle 3 is connected to a first sensor 6 and a pressure stabilizing component. The pressure stabilizing component provides a stable air pressure source, and the first sensor 6 measures the current air pressure value. At least two air outlets 31 are evenly spaced on the side wall of the air needle 3. The upper surface of the workpiece seat 2 has a work station 21 that mates with the part, and the work station 21 has a circumferentially open clearance groove 22. The clearance groove 22 with an open structure promotes gas discharge and avoids obstructing gas discharge, which would affect the measured air pressure value. The first sensor 7 is a gas pressure sensor.

[0026] In one embodiment, the first actuator 4 is a pneumatic cylinder, and the second actuator 5 is an electric cylinder. The first actuator 4 controls the workpiece seat to switch between the retracted and inspection positions. Both positions are fixed. Using a pneumatic cylinder reduces equipment costs and provides a fast response. The second actuator 5 drives the air needle 3 to move up and down. The electric cylinder collects the current displacement, i.e., the height position of the air needle 3, and records it along with the currently collected air pressure value, enabling axial full inspection of the inner hole of the part.

[0027] In one embodiment, the air needle 3 is mounted on the second actuator 5 via a first protective component 7. The first protective component 7 includes a first fixed base 71, a first spring 72, and a floating rod 73. The floating rod 73 is vertically floating on the first fixed base 71, and the first spring 72 is mounted on the floating rod 73. The first spring 72 provides a downward thrust to the floating rod 73. The floating rod 73 is axially provided with a through air passage 731. The air needle 3 is mounted on the lower end of the floating rod 73, and the upper end of the floating rod 73 is connected to the first sensor 6.

[0028] In the above embodiment, a vertically penetrating first guide hole is provided on the first fixed base 71, and the floating rod 73 is slidably disposed in the first guide hole. A limiting nut 74 is provided at the upper end of the floating rod 73; a limiting edge 732 is provided at the lower end of the floating rod 73, and the two ends of the first spring 72 act on the limiting edge 732 and the first fixed base 71. When the air needle 3 is misaligned with the part, the second actuator 5 drives the air needle to move downward, preventing the air needle 3 from inserting into the hole of the part, thus avoiding damage to the air needle and the part. The floating rod 73 remains stationary, and the first fixed base 71 continues to move downward. During this process, the first spring 72 is compressed. When the second actuator 5 resets, the floating rod 73 is reset by the restoring force of the first spring 72.

[0029] In the above embodiment, a second sensor 75 is also provided on the first protective component 7. The second sensor 75 is mounted on the first fixed base 71 and is used to sense the movement of the floating rod 73. Specifically, the second sensor 75 is a proximity switch, using a limit nut as an identification block. When the air needle 3 is blocked, the floating rod 73 stops, while the first fixed base 71 continues to move downward, causing the second sensor 75 to detect the limit nut 74, indicating that the air needle 3 is not aligned with the part at this time.

[0030] In one embodiment, an adjustment component 8 is provided on the second actuator 5, and the air needle 3 is disposed on the adjustment component 8, and the horizontal position of the air needle 3 is adjusted by the adjustment component 8.

[0031] In the above embodiment, the adjustment assembly 8 includes a second fixed base 81, a first adjustment block 82, and a second adjustment block 83. The second fixed base 81 is disposed on the second actuator 5 and has a first oblong hole 811 along the X-axis. The first adjustment block 82 is disposed on the second fixed base 81 and fixed to the first oblong hole 811 by screws. The second adjustment block 83 has a second oblong hole 831 along the Y-axis and is disposed on the first adjustment block 82. Screws pass through the second oblong hole 831 to fix the first adjustment block 82 and the second adjustment block 83. The air needle 3 is connected to the second adjustment block 83. The position of the air needle 3 in the X-axis and Y-axis directions can be adjusted by the adjustment assembly 8.

[0032] Preferably, the second fixed seat 81 and the second adjusting block 83 are provided with guide grooves that cooperate with the first adjusting block 82. The first adjusting block 82 is placed in the guide groove, and the guide groove guides the first adjusting block 82 to move along the X-axis and guides the second adjusting block 82 to move along the Y-axis.

[0033] In one embodiment, a fixing plate 84 is provided on the side of the second fixing base 81, and a first adjusting screw 85 is provided on the fixing plate 84. The first adjusting screw 85 acts on the first adjusting block 82, and pushes the first adjusting block 82 to move along the X-axis. An adjusting screw hole is provided on the second adjusting block 83, and a second adjusting screw 86 is provided on the adjusting screw hole. One end of the second adjusting screw 86 acts on the second fixing base 81, and pushes the second adjusting block 83 to move along the Y-axis. The second fixing base 81 is L-shaped, and the second adjusting screw 86 acts on the vertical plate of the second fixing base 81.

[0034] In the above embodiment, the fixing plate 84 is disposed on both sides of the second fixing base 81, and the two fixing plates 84 are provided with first adjusting screws 85, so as to facilitate the selection of the corresponding first adjusting screws 85 according to the adjustment direction of the first adjusting block 82.

[0035] In one embodiment, the first actuator 4 is mounted on the bracket 1 via an adjusting plate 11, and third oblong holes 12 are provided on both sides of the surface of the adjusting plate 11. The adjusting plate 11 is fixed to the bracket 1 with screws, and the position of the adjusting plate 11 in the Z-axis direction is adjusted using the third oblong holes 12. In this embodiment, three oblong holes are provided on each side of the third oblong holes 12, thereby improving the reliability of the installation of the adjusting plate 11 and the bracket 1.

[0036] In one embodiment, the workpiece holder 2 is mounted on the first actuator 4 via a second protective component 9. The second protective component 9 includes a third fixed seat 91, a first limiting block 92, a second limiting block 93, and a second spring 94. The third fixed seat 91 is mounted on the first actuator 4 and has a second guide hole that mates with the workpiece holder 2. The first limiting block 92 and the second limiting block 93 are located at the lower end and middle of the workpiece holder 2, respectively. The second spring 94 is mounted on the workpiece holder 4 and provides an upward thrust to the workpiece holder 2. When the first actuator 4 drives the workpiece holder 2 to move upward, if the workpiece holder 2 is not aligned with the workpiece, it will contact the rotating disk, preventing the workpiece holder 2 from continuing to move upward. The second spring 94 protects the workpiece holder 2 and prevents damage to the workpiece holder 2 or the rotating disk.

[0037] In one embodiment, an axial exhaust channel 32 is provided between two adjacent air outlets 31. The exhaust channel 31 allows the air discharged from the air outlets 31 to be quickly discharged, avoiding any impact on the accuracy of the measurement.

[0038] In one embodiment, three vents 31 are provided.

[0039] In the above embodiments, the pressure stabilizing component is used to provide a stable pressure air supply to the needle. The pressure stabilizing component is a conventional component; in this embodiment, the pressure stabilizing component includes an air source processor, a valve island, a pressure stabilizing tank, and a precision pressure reducing valve connected in sequence.

[0040] This utility model discloses a detection method based on a detection device, comprising the following steps:

[0041] Step 1: Rotate the part to the inspection mechanism using a rotary table;

[0042] Step 2: Drive the workpiece seat to lift using the first actuator to lift the part on the rotating disk to the detection position;

[0043] Step 3: The second actuator drives the air needle to move up and down, and the gas is ejected from the air outlet. The gas pressure value is monitored by the first sensor.

[0044] Step 4: Based on the monitored data, compare it with the pre-stored qualified data range in the computer. If it is within the range, the part is qualified; otherwise, it is unqualified.

[0045] The air pressure value detected by the first sensor corresponds to the displacement distance of the air needle 3 driven by the second actuator, thereby measuring the size of any position in the monitored axis and improving the detection range.

[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Any modifications or equivalent substitutions to the present utility model without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present utility model.

Claims

1. A device for detecting the inner hole size of a part based on air pressure value, characterized in that, The device includes a support, a workpiece holder, an air needle, a first actuator, and a second actuator. The first and second actuators are mounted on the support, the workpiece holder is mounted on the first actuator, and the air needle is mounted on the second actuator. The first actuator drives the workpiece holder to move to a detection position, and the second actuator drives the air needle to move up and down. The air needle is connected to a first sensor and a pressure stabilizing component. The pressure stabilizing component provides a stable air source, and the first sensor measures the current air pressure value. At least two air outlets are evenly spaced on the side wall of the air needle. The upper surface of the workpiece holder has a work station for cooperating with the part, and the work station has a circumferentially open clearance groove.

2. The device for detecting the inner hole size of a part based on air pressure value according to claim 1, characterized in that, The first actuator is a pneumatic cylinder, and the second actuator is an electric cylinder.

3. The device for detecting the inner hole size of a part based on air pressure value according to claim 1, characterized in that, The air needle is mounted on the second actuator via a first protective assembly. The first protective assembly includes a first fixed base, a first spring, and a floating rod. The floating rod is vertically floating on the first fixed base. The first spring is mounted on the floating rod and provides a downward thrust to the floating rod. The floating rod has an axially extending air passage. The air needle is mounted on the lower end of the floating rod, and the upper end of the floating rod is connected to the first sensor.

4. The device for detecting the inner hole size of a part based on air pressure value according to claim 3, characterized in that, The first fixed base is provided with a vertically penetrating first guide hole, the floating rod is slidably disposed in the first guide hole, and a limiting nut is provided at the upper end of the floating rod; a limiting edge is provided at the lower end of the floating rod, and the two ends of the first spring act on the limiting edge and the first fixed base.

5. The device for detecting the inner hole size of a part based on air pressure value according to claim 1, characterized in that, An adjustment component is provided on the second actuator, and the air needle is disposed on the adjustment component. The horizontal position of the air needle is adjusted by the adjustment component.

6. The device for detecting the inner hole size of a part based on air pressure value according to claim 5, characterized in that, The adjustment assembly includes a second fixed base, a first adjustment block, and a second adjustment block. The second fixed base is disposed on the second actuator and has a first oblong hole along the X-axis. The first adjustment block is disposed on the second fixed base and fixed to the first oblong hole by screws. The second adjustment block has a second oblong hole along the Y-axis and is disposed on the first adjustment block. Screws pass through the second oblong hole to fix the first adjustment block and the second adjustment block. The air needle is connected to the second adjustment block.

7. A device for detecting the inner hole size of a part based on air pressure value according to claim 6, characterized in that, A fixing plate is provided on the side of the second fixing base, and a first adjusting screw is provided on the fixing plate. The first adjusting screw acts on the first adjusting block and pushes the first adjusting block to move along the X-axis. An adjusting screw hole is provided on the second adjusting block, and a second adjusting screw is provided on the adjusting screw hole. One end of the second adjusting screw acts on the second fixing base and pushes the second adjusting block to move along the Y-axis.

8. The device for detecting the inner hole size of a part based on air pressure value according to claim 1, characterized in that, The first actuator is mounted on the bracket via an adjustment plate. The adjustment plate has third oblong holes on both sides of its surface. The adjustment plate is fixed to the bracket with screws, and the position of the adjustment plate in the Z-axis direction is adjusted using the third oblong holes.

9. The device for detecting the inner hole size of a part based on air pressure value according to claim 8, characterized in that, The workpiece holder is mounted on the first actuator via a second protective assembly. The second protective assembly includes a third fixed seat, a first limiting block, a second limiting block, and a second spring. The third fixed seat is mounted on the first actuator and has a second guide hole that mates with the workpiece holder. The first limiting block and the second limiting block are located at the lower end and middle of the workpiece holder, respectively. The second spring is mounted on the workpiece holder and provides an upward thrust to the workpiece holder.

10. The device for detecting the inner hole size of a part based on air pressure value according to claim 1, characterized in that, An axial exhaust channel is provided between two adjacent air outlets.

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