A piston head outer ring groove roughness detection device

Abstract

This utility model discloses a piston head outer ring groove roughness testing device in the field of engine manufacturing technology. It includes a testing component for extending into the piston head outer ring groove to test the upper and lower surfaces of the groove, a rotating mechanism for driving the testing component to rotate circumferentially along the outer ring groove, and a lifting mechanism for driving the testing component to move vertically to adapt to testing the outer ring groove at different heights. The testing component includes a roughness tester body, a column located on one side of the roughness tester body, a measuring rod fixed to one end of the roughness tester body, and a measuring stylus fixed to the end of the measuring rod. This device drives the testing component to rise and fall via the lifting mechanism, enabling testing of the outer ring groove at different heights. The rotating mechanism achieves full-circumference testing of the outer ring groove, and the insertion depth of the testing component is adjustable. It can also flip to test the upper and lower surfaces of the outer ring groove, solving the problem of insufficient representativeness in localized testing in existing technologies.

Description

Technical Field

[0001] This utility model relates to the field of engine manufacturing technology, specifically to a piston head outer ring groove roughness detection device. Background Technology

[0002] In the fields of engine manufacturing and precision parts machining, the piston head is a key component, and the surface roughness of its outer ring groove directly affects its sealing performance, wear resistance, and overall operational stability. Therefore, high-precision and high-efficiency roughness testing of the piston head's outer ring groove is particularly important during the production process.

[0003] Currently, conventional inspection methods mainly rely on manual operation. For example, a handheld roughness tester is used to measure the annular groove locally. Due to the large human error, measurement deviations can easily occur between different batches or different operators, affecting data repeatability. Moreover, it is impossible to achieve comprehensive inspection of multi-layered outer annular grooves. Usually, only a single height of the outer annular groove can be measured, and most can only inspect a single surface (upper or lower surface), which is difficult to meet the inspection requirements of complex piston heads, and it is also difficult to complete the inspection in the circumferential direction.

[0004] To address this issue, a piston head outer ring groove roughness detection device is provided to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a piston head outer ring groove roughness detection device, which solves the problem in the prior art that local detection is difficult to achieve comprehensive detection of multi-layer outer ring grooves.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A piston head outer ring groove roughness testing device includes a testing component for extending into the piston head outer ring groove to test the upper and lower surfaces of the outer ring groove, a rotating mechanism for driving the testing component to rotate circumferentially along the outer ring groove, and a lifting mechanism for driving the testing component to move vertically to adapt to the testing of the outer ring groove at different height positions. The testing component includes a roughness tester body, a column located on one side of the roughness tester body, a measuring rod fixedly disposed at one end of the roughness tester body, and a measuring stylus fixedly disposed at the end of the measuring rod. An adjusting rod is fixedly disposed at the other end of the roughness tester body. The adjusting rod is rotatably disposed inside the column. Fasteners for locking the adjusting rod are provided on the surface of the column.

[0008] As a further optimization of this utility model, the surface of the adjusting rod is provided with scale markings.

[0009] As a further optimization of this utility model, the adjusting rod is provided with a slot along its axial direction, and the column is provided with a positioning pin that passes through the slot.

[0010] As a further optimization of this utility model, the rotating mechanism includes a gear ring, a gear meshing with the gear ring, a motor for driving the gear to rotate, and a mounting bracket for supporting the gear ring and enabling it to rotate around a central axis; the column is fixedly disposed on the top of the gear ring, and the mounting bracket is mounted on the lifting mechanism.

[0011] As a further optimization of this utility model, the detection device also includes a positioning component located below the gear ring, the positioning component being used to drive the gear ring to move so that the rotation center of the gear ring coincides with the center of the piston head.

[0012] As a further optimization of this utility model, the positioning component includes two symmetrically distributed positioning frames and a translation mechanism for driving the two positioning frames to move simultaneously toward or in opposite directions; the positioning frame is provided with a V-shaped surface for contacting the outer circle of the piston head, the center of the gear ring is located at the center of the line connecting the two positioning frames, and the translation mechanism is fixedly mounted on the mounting frame.

[0013] As a further optimization of this utility model, the positioning component also includes a support frame, an electromagnetic chuck fixedly disposed on the top of the support frame, and a metal block fixedly disposed on the bottom of the lifting mechanism; the electromagnetic chuck adsorbs the metal block when energized to achieve rigid fixation of the lifting mechanism, and a telescopic rod is provided between the lifting mechanism and the side plate of the support frame, with both ends of the telescopic rod being hinged to the lifting mechanism and the support frame respectively.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model uses a lifting mechanism to drive the detection component to rise and fall, so as to detect the outer ring groove at different height positions. The rotation mechanism realizes full circumference detection of the outer ring groove, and the insertion depth of the detection component is adjustable. It can flip the detection of the upper and lower surfaces of the outer ring groove, thus solving the problem of insufficient representativeness of local detection in the prior art.

[0016] 2. This utility model uses a positioning component to achieve automatic centering of the detection component, reducing manual intervention and ensuring that the probe always rotates and scans around the central axis of the piston head. This effectively avoids measurement errors caused by eccentric rotation, significantly improves the consistency and repeatability of detection data, and the entire device has high detection efficiency and automation level, making it suitable for online or semi-online detection needs in mass production environments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the practical application of this utility model.

[0018] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the detection component structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the rotating mechanism structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the positioning component structure of this utility model. Figure 1 ;

[0023] Figure 7 This is a schematic diagram of the positioning component structure of this utility model. Figure 2 .

[0024] In the picture:

[0025] 1. Detection Components; 101. Roughness Tester Body; 102. Measuring Rod; 103. Measuring Stylus; 104. Adjusting Rod; 105. Column; 106. Fastener; 107. Slot; 108. Positioning Pin; 2. Rotation Mechanism; 201. Gear Ring; 202. Gear; 203. Motor; 204. Mounting Frame; 3. Lifting Mechanism; 4. Positioning Components; 401. Positioning Frame; 402. Translation Mechanism; 403. Support Frame; 404. Electromagnetic Chuck; 405. Metal Block; 406. Telescopic Rod. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0027] Example 1

[0028] To address the limitation of existing manual inspection methods in achieving comprehensive inspection of multi-layered outer ring grooves, please refer to [link to relevant documentation]. Figures 1-4 This utility model provides a piston head outer ring groove roughness detection device, including a detection component 1 for extending into the piston head outer ring groove to detect the upper and lower surfaces of the outer ring groove, a rotating mechanism 2 for driving the detection component 1 to rotate circumferentially along the outer ring groove, and a lifting mechanism 3 for driving the detection component 1 to move vertically to adapt to the detection of the outer ring groove at different height positions. The rotating mechanism 2 drives the detection component 1 to rotate to achieve continuous measurement of the outer ring groove circumferentially. The lifting mechanism 3 can be implemented using an electric lead screw module, a pneumatic push rod, or a servo lifting column, etc.

[0029] The testing assembly 1 includes a roughness tester body 101, a column 105 located on one side of the roughness tester body 101, a measuring rod 102 fixedly disposed at one end of the roughness tester body 101, and a measuring stylus 103 fixedly disposed at the end of the measuring rod 102. An adjusting rod 104 is fixedly disposed at the other end of the roughness tester body 101. The adjusting rod 104 is rotatably disposed inside the column 105. The surface of the adjusting rod 104 is provided with scale markings to indicate the depth of the measuring stylus 103 inserted into the outer annular groove. The surface of the column 105 is provided with fasteners 106 for locking the adjusting rod 104, so as to realize the axial extension and retraction adjustment function of the measuring stylus 103, thereby adjusting the insertion amount according to the actual width and depth of the outer annular groove, ensuring that the measuring stylus 103 stably contacts the measured surface without deviation or interference, and adapting to outer annular groove structures of different shapes and sizes.

[0030] The adjusting rod 104 has a slot 107 along its axial direction, and the column 105 has a positioning pin 108 that passes through the slot 107.

[0031] like Figures 5-6 As shown, the rotating mechanism 2 includes a gear ring 201, a gear 202 meshing with the gear ring 201, a motor 203 for driving the gear 202 to rotate, and a mounting bracket 204 for supporting the gear ring 201 and allowing it to rotate around a central axis. A column 105 is fixedly mounted on the top of the gear ring 201, and the mounting bracket 204 is mounted on the lifting mechanism 3, allowing the entire rotating mechanism 2 to move up and down with the lifting mechanism 3 to adapt to different height positions of the outer ring groove for detection. In use, the motor 203 is started, driving the gear 202 to rotate. The gear 202 drives the gear ring 201 to rotate, which in turn drives the detection assembly 1 to rotate uniformly around the central axis of the piston head. The probe 103 continuously scans one circle along the contour of the outer ring groove, collecting surface roughness data.

[0032] The piston head to be tested is transported to the bottom of the testing device by the conveying assembly. The lifting mechanism 3, controlled manually or automatically, lowers the testing assembly 1 to the vicinity of the target outer ring groove. The adjusting rod 104 is pushed to insert the probe 102 into the outer ring groove. Then, the fastener 106 is tightened to lock it. The lifting mechanism 3 is then slowly adjusted up and down to ensure that the probe 103 stably contacts the upper or lower surface of the outer ring groove, ensuring good contact between the probe 103 and the surface being measured during the measurement process. The rotating mechanism 2 is started to drive the testing assembly 1 to rotate uniformly around the central axis of the piston head for one revolution. The probe 103 continuously scans along the contour of the outer ring groove to collect surface roughness data (such as Ra, Rz, etc.) and records it through the roughness meter body 101. After analysis and measurement, loosen the fastener 106, pull the measuring rod 102 out of the outer ring groove, then pull out the positioning pin 108, manually flip the adjusting rod 104, causing the roughness tester body 101 and the measuring rod 102 to flip 180° synchronously, then reinsert it into the outer ring groove and lock the fastener 106. Repeat the above measurement steps to complete the inspection of the other side of the outer ring groove. If it is necessary to inspect multiple outer ring grooves of different heights, the lifting mechanism 3 can be used to drive the detection component 1 to rise or fall to the target outer ring groove position, and repeat the steps of insertion, adjustment, measurement and flipping to complete the inspection of the upper and lower sides of each layer of outer ring groove in sequence, solving the problem that local inspection in the prior art is difficult to achieve comprehensive inspection of multiple layers of outer ring grooves.

[0033] Example 2

[0034] Based on Example 1, in order to ensure that the probe 103 can scan around the central axis of the piston head during rotation, thereby improving detection accuracy and consistency, such as... Figures 1-3 , Figures 6-7 As shown, the detection device also includes a positioning component 4 located below the gear ring 201. The positioning component 4 is used to drive the gear ring 201 to move so that the rotation center of the gear ring 201 coincides with the center of the piston head, ensuring that the probe 103 always moves along the circular trajectory during rotation, thereby improving detection accuracy and data repeatability.

[0035] The positioning assembly 4 includes two symmetrically distributed positioning frames 401 and a translation mechanism 402 for driving the two positioning frames 401 to move simultaneously towards or in opposite directions. The positioning frames 401 have V-shaped surfaces for contacting the outer circle of the piston head. The center of the gear ring 201 is located at the center of the line connecting the two positioning frames 401. The translation mechanism 402 is fixedly mounted on the mounting bracket 204. The translation mechanism 402 can be a bidirectional screw drive structure, equipped with a drive component and a limit sensor, capable of precisely adjusting the position of the positioning frames 401 under the coordination of the control system.

[0036] The positioning component 4 also includes a support frame 403, an electromagnetic chuck 404 fixedly mounted on the top of the support frame 403, and a metal block 405 fixedly mounted on the bottom of the lifting mechanism 3. The electromagnetic chuck 404 attracts the metal block 405 when energized, thereby achieving rigid fixation of the lifting mechanism 3. A telescopic rod 406 is provided between the side plate of the lifting mechanism 3 and the support frame 403. The two ends of the telescopic rod 406 are respectively hinged to the lifting mechanism 3 and the support frame 403, which are used to provide auxiliary guidance during horizontal movement and maintain the stability of the lifting mechanism 3.

[0037] The piston head to be tested is transported to the bottom of the testing device by the conveying assembly. The lifting mechanism 3 is controlled to drive the testing assembly 1 down to the vicinity of the target outer ring groove. At this time, the piston head is placed in the middle area between the two positioning frames 401 and is not completely centered. The electromagnetic chuck 404 is de-energized and the translation mechanism 402 is started, which drives the two positioning frames 401 with V-shaped surfaces to move inward synchronously. The positioning frames 401 clamp the outer circular surface of the piston head. As the positioning frames 401 move, they drive the mounting frame 204, the rotating mechanism 2 and the lifting mechanism 3 connected to them to move together, so that the central axis of the piston head coincides with the rotation center of the gear ring 201, and the automatic centering is completed. After the centering is completed, the electromagnetic chuck 404 is energized and the electromagnetic chuck 404 attracts the metal block 405, so that the entire lifting mechanism 3 and the support frame 403 form a rigid connection. At this time, the probe 103 is inserted into the outer ring groove and begins to rotate and measure.

[0038] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A device for detecting the roughness of the outer ring groove of a piston head, comprising a detection assembly (1) for extending into the outer ring groove of the piston head to detect both the upper and lower faces of the outer ring groove, characterized in that: It also includes a rotating mechanism (2) for driving the detection assembly (1) to rotate circumferentially along the outer ring groove, and a lifting mechanism (3) for driving the detection assembly (1) to move vertically to adapt to the detection of the outer ring groove at different height positions. The detection assembly (1) includes a roughness tester body (101), a column (105) located on one side of the roughness tester body (101), a measuring rod (102) fixedly disposed at one end of the roughness tester body (101), and a measuring stylus (103) fixedly disposed at the end of the measuring rod (102). An adjusting rod (104) is fixedly disposed at the other end of the roughness tester body (101). The adjusting rod (104) is rotatably disposed inside the column (105). Fasteners (106) for locking the adjusting rod (104) are provided on the surface of the column (105).

2. A piston head outer ring groove roughness detection device according to claim 1, characterized in that, The adjustment rod (104) has scale markings on its surface.

3. A piston head outer ring groove roughness detection device according to claim 1, wherein The adjusting rod (104) has a slot (107) along its axial direction, and the column (105) has a positioning pin (108) that passes through the slot (107).

4. A piston head outer ring groove roughness detection device according to claim 1, wherein The rotating mechanism (2) includes a gear ring (201), a gear (202) meshing with the gear ring (201), a motor (203) for driving the gear (202) to rotate, and a mounting bracket (204) for supporting the gear ring (201) and enabling it to rotate about a central axis. The column (105) is fixedly mounted on the top of the gear ring (201), and the mounting bracket (204) is mounted on the lifting mechanism (3).

5. A piston head outer ring groove roughness detection device according to claim 4, wherein The detection device also includes a positioning component (4) located below the gear ring (201), the positioning component (4) being used to drive the gear ring (201) to move so that the rotation center of the gear ring (201) coincides with the center of the piston head.

6. A piston head outer ring groove roughness detection device according to claim 5, wherein The positioning component (4) includes two symmetrically distributed positioning frames (401) and a translation mechanism (402) for driving the two positioning frames (401) to move simultaneously toward or in opposite directions. The positioning frame (401) is provided with a V-shaped surface for contacting the outer circle of the piston head. The center of the gear ring (201) is located at the center of the line connecting the two positioning frames (401). The translation mechanism (402) is fixedly mounted on the mounting frame (204).

7. A piston head outer ring groove roughness detection device according to claim 6, wherein The positioning component (4) also includes a support frame (403), an electromagnetic chuck (404) fixed on the top of the support frame (403), and a metal block (405) fixed on the bottom of the lifting mechanism (3). The electromagnetic chuck (404) adsorbs the metal block (405) when energized, so as to achieve rigid fixation of the lifting mechanism (3). A telescopic rod (406) is provided between the side plate of the lifting mechanism (3) and the support frame (403). The two ends of the telescopic rod (406) are respectively hinged to the lifting mechanism (3) and the support frame (403).

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