A piston ring size detection machine

Abstract

The utility model belongs to piston ring detection equipment technical field, and disclose a kind of piston ring size detection machine, including centring axle main body, lifting drive mechanism, elastic support assembly and piston ring, centring axle main body is coaxial integrated structure, from top to bottom sequentially including lead-in section, positioning section and connecting section, wherein lead-in section is 15 ° big taper angle structure.Through the above-mentioned scheme, the piston ring centring device of current many using one-way taper angle centring axle is solved, and this only one-way taper angle centring axle is difficult to take into account the dual needs of quick feeding and accurate positioning, if only using big taper angle, positioning precision is insufficient, piston ring is easy to sway during detection, leading to data deviation, if using small taper angle, feeding fault tolerance is low, piston ring is easy to jam and feeding efficiency is low, and using expansion type centring structure can realize positioning, easy to cause inner ring scratch or thin-walled piston ring deformation, and expansion mechanism occupies inner ring space, can interfere with the detection operation of inner ring groove and other key parts problem.

Description

Technical Field

[0001] This utility model belongs to the technical field of piston ring testing equipment, specifically a piston ring size testing machine. Background Technology

[0002] During the production and processing of piston rings, it is necessary to accurately detect key parameters such as their inner diameter, inner groove size, and inner surface quality. The prerequisite for this detection is to achieve stable centering and positioning of the piston rings.

[0003] In existing technologies, piston ring centering devices mostly adopt a single cone-angle centering shaft or a shrinking centering structure. A single cone-angle centering shaft cannot meet the dual requirements of rapid feeding and accurate positioning. If a large cone angle is used, the positioning accuracy is insufficient, and the piston ring is prone to shaking during testing, resulting in data deviation. If a small cone angle is used, the feeding error tolerance is low, the piston ring is prone to jamming, and the feeding efficiency is low. Although the shrinking centering structure can achieve positioning, the centering shaft directly contacts and shrinks the inner ring of the piston ring, which can easily cause scratches on the inner ring or deformation of thin-walled piston rings. Moreover, the shrinking mechanism occupies the inner ring space, which will interfere with the testing operation of critical parts such as the inner ring groove. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a piston ring size inspection machine with a structural design featuring a dual-cone phased positioning system and a coordinated elastic support claw. This design enables rapid insertion, precise centering, and non-destructive fixing of the piston ring, while also providing ample operating space for subsequent inspections.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a piston ring size inspection machine, comprising a centering shaft body, a lifting drive mechanism, an elastic support assembly, and piston rings. The centering shaft body is a coaxial integrated structure, comprising, from top to bottom, an inlet section, a positioning section, and a connecting section. The inlet section is a 15° large cone angle structure, with its large diameter end facing upward and its small diameter end facing downward. The positioning section is a 5° small cone angle structure, with its large diameter end smoothly connected to the small diameter end of the inlet section, and its small diameter end fixed downward to the connecting section. The connecting section is rigidly connected to the lifting drive mechanism.

[0006] Preferably, the elastic support assembly includes six sets of evenly distributed elastic support claws, which are arranged around the centering shaft body and all extend and retract in the direction of the axis of the centering shaft body. The elastic support claws integrate pressure sensors, which are connected to the controller signal of the lifting drive mechanism.

[0007] Preferably, the piston ring has grooves on both its surface and inner diameter, and the contact end of the elastic support claw is made of flexible polyurethane material, with the contact end position corresponding to the ungrooved blank area of ​​the piston ring.

[0008] Preferably, the lifting drive mechanism is a servo electric cylinder, and the connecting section is rigidly fixed to the output end of the servo electric cylinder by a key connection.

[0009] Preferably, the six sets of elastic support claws are evenly distributed around the circumference of the centering shaft body axis, and the included angle between adjacent elastic support claws is 60°.

[0010] Preferably, the diameter of the centering shaft body is smaller than the inner diameter of the piston ring to be tested.

[0011] Preferably, a dimension testing machine is provided on the outer side, wherein the dimension testing machine includes outer diameter measurement, outer groove measurement, plane measurement and inner groove measurement, wherein the outer diameter measurement corresponds to the outer side of the piston ring, the plane measurement corresponds to the size of the piston ring, the inner groove measurement corresponds to the inner groove of the piston ring, and the outer groove measurement corresponds to the outer groove of the piston ring.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention solves the problem of a thin centering shaft failing to provide proper centering, while also ensuring positioning accuracy, product protection, and ease of inspection. It employs a centering shaft to locate the center, elastic support claws to provide support from all sides, and a small cone angle to prevent slippage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the main structure of the centering shaft of this utility model; Figure 3 This is a schematic diagram of the piston ring structure of this utility model; Figure 4 This is a schematic diagram of the structure of the elastic support component of this utility model; Figure 5 This is a schematic diagram of the structure of the elastic support component of this utility model.

[0014] In the diagram: 1. Centering shaft body; 11. Inlet section; 12. Positioning section; 13. Connecting section; 2. Lifting drive mechanism; 3. Elastic support component; 31. Elastic support claw; 4. Piston rings; 41. Grooveless blank area; 5. Dimensional testing machine; 51. Outer diameter measurement; 52. Outer groove measurement; 53. Plane measurement; 54. Inner groove measurement. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1 to 5 As shown, this utility model provides a piston ring size inspection machine, including a centering shaft body 1, a lifting drive mechanism 2, an elastic support assembly 3, and a piston ring 4. The centering shaft body 1 is a coaxial integrated structure, which includes an inlet section 11, a positioning section 12, and a connecting section 13 from top to bottom. The inlet section 11 is a 15° large cone angle structure, with its large diameter end facing up and its small diameter end facing down. The positioning section 12 is a 5° small cone angle structure, with its large diameter end smoothly connected to the small diameter end of the inlet section 11, and its small diameter end facing down and fixed to the connecting section 13. The connecting section 13 is rigidly connected to the lifting drive mechanism 2. In this example, after piston ring 4 is fitted onto the centering shaft, the top 15° large cone angle guides piston ring 4 to slide down quickly. The top 15° large cone angle quickly corrects large deviations in piston ring, achieving rapid fitting and initial centering, solving the problem of feeding efficiency. The second stage, which requires precise positioning, involves the bottom 5° small cone angle to further calibrate micron-level deviations, achieving precise centering. In layman's terms, even if the piston ring is fitted off-center or slightly crooked when manually or by machine, the 15° gentle slope will generate a pulling force towards the center, automatically straightening piston ring 4 and allowing it to slide quickly along the slope to the middle position of the shaft, which is also the point of connection with the small cone angle.

[0017] Specifically, the elastic support component 3 includes six evenly distributed elastic support claws 31. The six elastic support claws 31 are arranged around the centering shaft body 1, and the extension and retraction directions are all pointing towards the axis of the centering shaft body 1. The elastic support claws 31 integrate pressure sensors 32, which are electrically connected to the controller of the lifting drive mechanism 2. The contact end of the support claw is designed with a narrow surface, only pressing against the grooveless part. Even if the inner groove is very close to the support point, it will not block the detection surface of the groove. The support claw is made of polyurethane material, which only gently presses against the inner ring and will not squeeze or damage the edge and surface of the inner groove. Furthermore, grooves are provided on the surface and inner diameter of the piston ring 4. The contact end of the elastic support claw 31 is made of flexible polyurethane material, and the position of the contact end corresponds to the grooveless blank area 41 of the piston ring 4. The 5° small cone angle slope will give the piston ring 4 an upward support force. Combined with the radial pushing force of the elastic support claw 31, the piston ring 4 is like being stuck in a precise invisible groove and will not move no matter what.

[0018] Furthermore, the lifting drive mechanism 2 is a servo electric cylinder with high precision. During the lifting process, it drives the connecting section 13 to lift and lower, ensuring no shaking during the lifting process. The up and down movement realizes the loading, unloading and positioning of the piston ring 4.

[0019] It is worth noting that the six sets of elastic support claws 31 are evenly distributed around the axis of the centering shaft body 1, and the included angle between adjacent elastic support claws 31 is 60°. Each elastic support claw 31 faces the grooveless blank area 41 of the inner ring of the piston ring 4, specifically avoiding the inner groove to be tested, so as not to block the way.

[0020] It is worth noting that the diameter of the centering shaft body 1 is smaller than the inner diameter of the piston ring 4 to be tested.

[0021] It is worth mentioning that a dimensional testing machine 5 is set on the outside of the piston ring 4. The dimensional testing machine 5 includes an outer diameter measuring machine 51, an outer groove measuring machine 52, a flatness measuring machine 53, and an inner groove measuring machine 54. The outer diameter measuring machine 51 corresponds to the outer side of the piston ring 4, the flatness measuring machine 53 corresponds to the size of the piston ring 4, the inner groove measuring machine 54 corresponds to the inner groove of the piston ring 4, and the outer groove measuring machine 52 corresponds to the outer groove of the piston ring 4. It measures the width of the groove, the distance between the two sides of the groove opening, and the groove depth, which is the distance from the inner ring surface to the bottom of the groove, from the horizontal direction close to the inner ring groove. It is used to measure various positions of the piston ring 4. Moreover, the inner ring groove detection and the outer diameter, outer groove, and flatness detection can be performed simultaneously. Multiple dimensional measurement sensors work at the same time without increasing the detection time.

[0022] The piston ring 4 is existing technology and will not be described further. Additionally, this utility model also includes a power supply, controller, and switch, which are not the main technical points of this patent and will not be described further. The "front, rear, left, and right" views of this device are... Figure 1 The direction shown in the diagram is the reference.

[0023] Working principle: The controller inside the testing machine issues a feeding command, and the lifting drive mechanism 2 drives the centering shaft body 1 to rise, so that the large diameter end of the inlet section 11 extends above the fixture support surface. The piston ring 4 is put into the inlet section 11 by manual or automated feeding mechanism. The piston ring 4 slides down along the inlet section 11. During the sliding process, if the piston ring 4 has a center offset tilt, the inclined surface with a large cone angle of 15° generates a radial component force, which pushes the piston ring 4 to automatically correct the deviation and slide down along the inclined surface until it enters the positioning section 12. Next, the positioning stage enters the precision positioning stage. When the piston ring 4 slides to the positioning section 12, its inner wall fits against the 5° small cone angle inclined surface, the downward resistance increases and triggers the limit switch of the lifting drive mechanism 2, the servo cylinder stops rising, the controller issues a support command, and the six sets of elastic support claws 31 extend synchronously. The contact head at one end of the support claw 31 contacts the grooveless blank area 41 of the piston ring 4. When the pressure sensor 32 detects that the support force reaches 0.2MPa, it sends a feedback signal to the controller, and the elastic support claws 31 stop extending. At this time, the coaxiality of the piston ring 4 is completed, and the precision centering is achieved. After the piston ring 4 is positioned, the outer diameter measurement 51, outer groove measurement 52, plane measurement 53 and inner groove measurement 54 measure the inner and outer sides of the piston ring 4 respectively, and record and provide feedback. Once the test is complete, the controller issues a reset command, the elastic support claw 31 retracts, the lifting drive mechanism 2 drives the centering shaft body 1 to descend and exit from the inner ring of the piston ring 4. The piston ring 4 is removed manually or by a sorting mechanism, and the centering shaft body 1 resets to wait for the next work cycle, completing the recording of the current values.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piston ring size inspection machine, comprising a centering shaft body (1), a lifting drive mechanism (2), an elastic support assembly (3), and a piston ring (4), characterized in that, The centering shaft body (1) is a coaxial integrated structure, which includes an inlet section (11), a positioning section (12) and a connecting section (13) from top to bottom. The inlet section (11) is a 15° large cone angle structure with its large diameter end facing up and its small diameter end facing down. The positioning section (12) is a 5° small cone angle structure with its large diameter end smoothly connected to the small diameter end of the inlet section (11), and its small diameter end facing down is fixed to the connecting section (13). The connecting section (13) is rigidly connected to the lifting drive mechanism (2).

2. The piston ring size inspection machine according to claim 1, characterized in that: The elastic support assembly (3) includes six sets of evenly distributed elastic support claws (31). The six sets of elastic support claws (31) are arranged around the centering shaft body (1), and the extension and retraction directions are all pointing to the axis of the centering shaft body (1). The elastic support claws (31) integrate pressure sensors (32), and the pressure sensors (32) are connected to the lifting drive mechanism (2).

3. A piston ring size inspection machine according to claim 2, characterized in that: The piston ring (4) has grooves on its surface and inner diameter. The contact end of the elastic support claw (31) is made of flexible polyurethane material, and the position of the contact end corresponds to the grooveless blank area (41) of the piston ring (4).

4. A piston ring size inspection machine according to claim 1, characterized in that: The lifting drive mechanism (2) is a servo electric cylinder, and the connecting section (13) is rigidly fixed to the output end of the servo electric cylinder by a key connection.

5. A piston ring size inspection machine according to claim 3, characterized in that: The six sets of elastic support claws (31) are evenly distributed around the axis of the centering shaft body (1), and the included angle between adjacent elastic support claws (31) is 60°.

6. A piston ring size inspection machine according to claim 5, characterized in that: The diameter of the centering shaft body (1) is smaller than the inner diameter of the piston ring (4) to be tested.

7. A piston ring size inspection machine according to claim 6, characterized in that: A size testing machine (5) is provided on the outside of the piston ring (4). The size testing machine (5) includes an outer diameter measurement (51), an outer groove measurement (52), a plane measurement (53), and an inner groove measurement (54). The outer diameter measurement (51) corresponds to the outer side of the piston ring (4), the plane measurement (53) corresponds to the size of the piston ring (4), the inner groove measurement (54) corresponds to the inner groove of the piston ring (4), and the outer groove measurement (52) corresponds to the outer groove of the piston ring (4).

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