Idle stroke contact module for indentation instrument
The idle contact module, which combines a pressure sensor and a positioning switch, enables precise contact control between the indenter and the sample being tested. This solves the problem of inaccurate sensing of the distance between the indenter and the sample in traditional indenters, thus improving testing efficiency and accuracy.
Patent Information
- Application Number
- CN202520232403.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-12
AI Technical Summary
In traditional indentation testers, the distance between the indenter and the test sample cannot be accurately sensed, resulting in cumbersome manual adjustments that affect testing efficiency and accuracy.
The idle contact module, which uses a pressure sensor and a positioning switch, achieves precise contact control between the pressure head and the sample under test by acquiring the time point of deceleration and approach, including the initial position, trigger position and test position, ensuring that the contact speed is within the micron-level accuracy range.
It significantly improves test efficiency, reduces preparation time, avoids impact errors caused by excessively fast contact speed, and improves the stability and accuracy of the test.
Smart Images
Figure CN223756461U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to indentation appearance technical field, especially is involved in a kind of idle path contact module for indentation appearance. BACKGROUND
[0002] With the continuous progress of science and technology, modern instruments and equipment are developing towards more convenient, efficient and fully automated. Especially in the application of fully automatic hardness tester, fully automatic indentation appearance and other precision testing equipment, traditional manual adjustment operation often cannot meet the needs of rapid and efficient testing. A common problem is that before the test starts, the distance between the indenter in the instrument and the test sample usually cannot be accurately perceived, so the operator must manually adjust the gap between the indenter and the sample. This manual adjustment process is not only tedious, but also because the adjustment distance often needs a certain time, which often leads to too long test preparation time, thereby affecting the efficiency of the overall testing process and increasing the operation burden of the staff.
[0003] Especially in the field of indentation method mechanical property testing, the contact process between the indenter and the test sample is crucial. In actual testing, the moving speed of the indenter before contacting the sample usually needs to be kept within the micron-level precision range. If the speed is too fast before contact or not properly controlled, it may cause unnecessary impact or error between the indenter and the sample, affecting the accuracy of the test results. Therefore, accurate control of the distance between the indenter and the sample is particularly important. SUMMARY
[0004] In order to overcome the shortcomings of the prior art, the utility model provides an idle path contact module for indentation appearance, which uses the cooperation of pressure sensor and positioning switch to obtain the time node of deceleration approach, significantly improves the test efficiency on the basis of ensuring the effectiveness of testing.
[0005] The technical solution adopted by the utility model to solve its technical problems is: an idle path contact module for indentation appearance, comprising:
[0006] An installation base body forms a movable cavity inside and forms an installation end for connecting a pressure sensor;
[0007] A movable unit can move in the movable cavity and at least includes a positioning seat for connecting an indenter, and the positioning seat is connected with a positioning switch;
[0008] The movable unit has at least an initial position, a trigger position and a test position;
[0009] In the initial position, the positioning switch and the pressure sensor are away from each other;
[0010] In the trigger position, the positioning switch contacts the pressure sensor, so that the positioning switch is triggered to send a deceleration signal outward;
[0011] In the test position, the active unit is abutted against the mounting base, so that the pressure sensor and the pressure head are rigidly connected.
[0012] The utility model discloses a cooperation of pressure sensor and positioning switch, obtains the deceleration time node of idle stroke contact module after the pressure head contacts the sample to be measured, and the pressure head is quickly and stably lowered to the predetermined contact speed in a short time, which significantly improves the test efficiency and reduces the test time extension caused by the excessively long adjustment process. The distance between the active unit and the mounting base is determined, and the distance between the pressure head and the sample to be tested can be accurately controlled before the pressure head and the pressure sensor are rigidly connected, which ensures that the contact speed of the pressure head and the sample to be tested reaches the predetermined standard after the pressure head and the pressure sensor are rigidly connected. The preparation time before the test is reduced, and the influence of the excessively fast contact speed on the test result is effectively avoided, which improves the stability and accuracy of the test process. After the pressure sensor and the pressure head are rigidly connected, the function of the idle stroke contact module ends, and no interference is generated to the subsequent test, which ensures the accuracy and consistency of the subsequent test process. The positioning switch is arranged in the mounting base, and the overall structure is simple and has little influence from the outside.
[0013] Further, a guide shaft is arranged in the mounting base and is in position-limiting movement cooperation with the active unit, so that the active unit translates along the guide shaft between the initial position, the trigger position and the test position.
[0014] Further, the mounting base comprises a bottom cover and a connecting piece which are combined to form an active cavity, the guide shaft is connected with the bottom cover and the connecting piece respectively, and the connecting piece forms a mounting end for connecting the pressure sensor.
[0015] Further, the active unit further comprises a sliding member which is in sliding cooperation with the guide shaft, and the sliding member is connected with the positioning seat.
[0016] Further, the sliding member comprises a body which is sleeved around the positioning seat, and extension parts which are symmetrically arranged on both sides of the body, and the number of the guide shafts is two, which are arranged in the two extension parts respectively. The guide shaft and the sliding member cooperate to form effective constraint on the overall stability of the sliding member, reduce the frictional interference possibly generated by the positioning seat, the sliding member and the positioning switch during movement, ensure the efficiency and accuracy of the positioning seat during movement, and make the contact trigger time point of the positioning switch and the pressure sensor more accurate.
[0017] Further, the inner diameter of the perforation of the extension part is equal to the outer diameter of the guide shaft, and the guide shaft is a shaft body with smooth outer wall.
[0018] Further, the positioning seat has a limiting flange, and the limiting flange is arranged in the bottom cover in an initial position.
[0019] Further, the positioning seat has a limiting flange, and the limiting flange is arranged in the bottom cover in an initial position.
[0020] Further, the connecting piece extends to the bottom cover to form a mounting sleeve, and the positioning switch extends into the mounting sleeve; and in a test position, the stop step surface abuts against a lower end surface of the mounting sleeve.
[0021] Further, the mounting end has an internal thread, and the pressure sensor is threadedly connected with the internal thread.
[0022] The utility model discloses the preparation process before the indentation appearance carries out the mechanical property test is optimized, improves whole test efficiency, reduces unnecessary manual intervention, improves the degree of automation and operation convenience of indentation appearance, and the influence of friction on test is reduced by using the cooperation of guide shaft and sliding part. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is the perspective view of the utility model.
[0024] Figure 2 It is the exploded structure schematic view of the utility model.
[0025] Figure 3 It is the sectional view of the utility model. Figure 1 .
[0026] Figure 4 It is the sectional view of the utility model. Figure 2 .
[0027] Figure 5 It is the perspective view of the sliding part in the utility model.
[0028] Wherein, 1 - installation base body, 11 - mounting end, 12 - bottom cover, 13 - connecting piece, 131 - mounting sleeve, 2 - movable cavity, 3 - pressure sensor, 4 - movable unit, 41 - positioning seat, 411 - limiting flange, 412 - stop step surface, 42 - sliding part, 421 - main body, 422 - extension, 423 - perforation, 5 - pressure head, 6 - positioning switch, 7 - guide shaft. DETAILED DESCRIPTION
[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.
[0030] like Figures 1-3 As shown, an idle contact module for an indenter includes a mounting base 1 with an internal movable cavity 2, a movable unit 4 that can move within the movable cavity 2, and a guide shaft 7 that cooperates with the movable unit 4 for limiting movement.
[0031] The mounting base 1 forms a mounting end 11 for connecting the pressure sensor 3. In this embodiment, for ease of assembly, the mounting base 1 includes a bottom cover 12 that is assembled to form a movable cavity 2 and a connector 13. The connector 13 forms a mounting end 11 for connecting the pressure sensor 3. In this embodiment, the mounting end 11 has an internal thread that is threadedly connected to the pressure sensor 3. Of course, in other embodiments, the mounting end 11 and the pressure sensor 3 can be connected in any way.
[0032] The guide shaft 7 is disposed inside the mounting base 1 and is connected to the bottom cover 12 and the connector 13 respectively. It is a shaft with a smooth outer wall. The guide shaft 7 is in a limiting movement cooperation with the movable unit 4, so that the movable unit 4 can move and switch between the initial position, the trigger position and the test position along the guide shaft 7.
[0033] The movable unit 4 includes at least a positioning seat 41 for connecting the pressure head 5. To prevent the positioning seat 41 from detaching from the mounting base 1, a limiting flange 411 is formed on the outer wall of the positioning seat 41. In the initial position, the limiting flange 411 is mounted on the bottom of the bottom cover 12. Axially above the limiting flange 411, the positioning seat 41 has a stop step surface 412, which abuts against the connector 13 in the test position.
[0034] The portion of the positioning seat 41 located within the movable cavity 2 is connected to a positioning switch 6. Specifically, an existing CHM6A5 positioning sensor can be used. To ensure the stability of the positioning switch 6, the connecting member 13 extends towards the bottom cover 12 to form a mounting sleeve 131. Both the positioning switch 6 and a portion of the positioning seat 41 covering the periphery of the positioning switch 6 extend into this mounting sleeve 131. At the test position, specifically, the stop step surface 412 abuts against the lower end face of the mounting sleeve 131.
[0035] The moving unit 4 further comprises a sliding piece 42 in sliding fit with the guide shaft 7, which is connected with the positioning seat 41, specifically fixedly assembled. Figure 5 As shown in the figure, the sliding piece 42 comprises a body 421 sleeved on the periphery of the positioning seat 41, and two extension parts 422 symmetrically arranged on both sides of the body 421, and the guide shaft 7 is in number of two, which are respectively slidably arranged in the two extension parts 422. Specifically, the inner diameter of the through hole 423 of the extension part 422 is equal to the outer diameter of the guide shaft 7. The guide shaft 7 is arranged in the through hole 423 of the extension part 422, and the two form a radial limiting fit, which effectively restricts the overall stability of the sliding piece 42, reduces the frictional interference that may be generated during the movement of the positioning seat 41, the sliding piece 42 and the positioning switch 6, ensures the efficiency and accuracy of the movement, and makes the contact triggering time point of the positioning switch 6 and the pressure sensor 3 more accurate.
[0036] During the movement of the moving unit 4, it has at least an initial position, a triggering position and a testing position. In the initial position, the positioning switch 6 on the positioning seat 41 is away from the pressure sensor 3, i.e. the two are not in contact; in the triggering position, the positioning switch 6 is in contact with the pressure sensor 3, so that the positioning switch 6 is triggered to send a deceleration signal outward; in the testing position, the moving unit 4 is in abutment with the mounting base 1, so that the pressure sensor 3 and the indenter 5 are rigidly connected.
[0037] Specifically, as shown in the figure, Figure 3 In the initial position, under the action of gravity, the limiting flange 411 of the positioning seat 41 is arranged on the inner bottom edge of the bottom cover 12, and remains in a stationary state. Since the positioning switch 6 is fixedly assembled with the positioning seat 41, at this time the positioning switch 6 is a certain distance away from the pressure sensor 3, and the two are away from each other and will not be in contact.
[0038] Under the drive of the indenter actuator, the whole air travel contact module quickly approaches the test sample. When the indenter 5 begins to contact the test sample, the positioning seat 41, the sliding piece 42 and the positioning switch 6 fixedly assembled as a whole start to move stably upward along the guide shaft 7 under the accurate guidance of the two guide shafts 7, until the displacement of the positioning switch 6 relative to the mounting base 1 reaches 0.3mm, the probe at the top of the positioning switch 6 contacts the lower plane of the pressure sensor 3, triggering the high-level signal of the positioning switch 6, the positioning switch 6 sends a deceleration signal outward, and the control system of the indenter receives the signal from the positioning switch 6, indicating that the contact process of the air travel contact module is about to enter the deceleration stage, ensuring that the contact speed is accurately controlled before contact, and avoiding excessive impact force between the indenter 5 and the test sample. The above-mentioned positioning switch 6 sending a deceleration signal outward and the control system of the indenter receiving the signal from the positioning switch 6 are realized by the prior art, and will not be described in detail.
[0039] As shown in the figure, Figure 4As shown, the idle contact module is precisely controlled by the control system, when the stop step surface 412 on the positioning seat 41 is about to contact the lower end surface of the mounting sleeve 131, the contact speed has been reduced to the target contact speed, through the cooperation of the positioning switch 6 and the pressure sensor 3, the idle contact module can realize high-speed approaching to the test sample and reducing to the target speed before contacting the test sample, ensuring the stability and accuracy of the contact process; after the stop step surface 412 contacts the lower end surface of the mounting sleeve 131, the pressure sensor 3 and the pressure head 5 are rigidly connected through the connecting piece 13 and the positioning seat 41, at this time the function of the idle contact module ends, and it no longer interferes with the subsequent test, ensuring the accuracy and consistency of the subsequent test process. It should be noted that the rigid connection of the pressure sensor 3 and the pressure head 5 means that the pressure sensor 3 and the pressure head 5 are connected through hard components such as the connecting piece 13 and the positioning seat 41, not just through the contact connection of the positioning switch 6.
[0040] Since the gap between the stop step surface 412 and the mounting sleeve 131 is a fixed value at the moment when the positioning switch 6 is triggered, the control system of the indentation instrument only needs to set a reasonable deceleration according to the known displacement to ensure that the pressure head 5 can reach the predetermined target contact speed before the stop step surface 412 contacts the lower end surface of the mounting sleeve 131, which can be achieved by the prior art and will not be described in detail. By using the positioning switch 6 and the pressure sensor 3, the contact triggering of the two is used as a control time node, which can assist in achieving the above-mentioned deceleration control, effectively avoiding the instability caused by too fast or too slow speed during the contact process, ensuring the accuracy and reliability of the test. Through this process, the idle contact module can realize fast approaching and smooth transition to the target contact speed, thereby providing a stable starting point for the subsequent accurate test.
[0041] Moreover, before the pressure sensor 3 and the pressure head 5 are rigidly connected through the connecting piece 13 and the positioning seat 41, although the pressure head 5 will exert a certain force on the test sample, the force mainly comes from the gravity of the sliding piece 42, the positioning seat 41, the positioning switch 6, and the pressure head 5 itself, and since the gravity of these components is small, the force generated during the movement before the rigid connection will not significantly affect the subsequent test results and will not interfere with the final accuracy of the test.
[0042] The above specific embodiments are used to explain and illustrate the present application, rather than limit the present application, any modifications and changes made to the present application within the spirit and protection scope of the claims of the present application, fall within the protection scope of the present application.
Claims
1. A fly height contact module for an indentation meter, characterized by, The utility model relates to a pressure sensor test device, comprising: a mounting base (1) internally forming a movable cavity (2) and forming a mounting end (11) for connecting a pressure sensor (3); a movable unit (4) movable in the movable cavity (2) and comprising at least a positioning seat (41) for connecting a pressure head (5), the positioning seat (41) being connected with a positioning switch (6); the movable unit (4) having at least an initial position, a trigger position and a test position; in the initial position, the positioning switch (6) is away from the pressure sensor (3); in the trigger position, the positioning switch (6) is in contact with the pressure sensor (3) so that the positioning switch (6) is triggered to send a deceleration signal outwardly; in the test position, the movable unit (4) is in abutment with the mounting base (1) so that the pressure sensor (3) and the pressure head (5) are rigidly connected.
2. The air contact module for an indentation instrument of claim 1, wherein: a guide shaft (7) is further provided on the mounting base (1) and is in position-limiting movement cooperation with the movable unit (4) so that the movable unit (4) is translated along the guide shaft (7) between the initial position, the trigger position and the test position.
3. The air contact module for an indentation instrument of claim 2, wherein: the mounting base (1) comprises a bottom cover (12) and a connecting piece (13) which are split to form the movable cavity (2), the guide shaft (7) is connected with the bottom cover (12) and the connecting piece (13) respectively, and the connecting piece (13) forms the mounting end (11) for connecting the pressure sensor (3).
4. The air contact module for an indentation instrument of claim 2, wherein: the movable unit (4) further comprises a sliding piece (42) in sliding cooperation with the guide shaft (7), the sliding piece (42) being connected with the positioning seat (41).
5. The air contact module for an indentation instrument of claim 4, wherein: the sliding piece (42) comprises a body (421) sleeved on the periphery of the positioning seat (41) and extension portions (422) symmetrically arranged on both sides of the body (421), the number of the guide shaft (7) is two, and the guide shaft (7) is arranged in the two extension portions (422) respectively.
6. The air contact module for an indentation instrument of claim 5, wherein: the inner diameter of a through hole (423) of the extension portion (422) is equal to the outer diameter of the guide shaft (7), and the guide shaft (7) is a shaft body with a smooth outer wall.
7. The air contact module for a notch press according to claim 3, wherein: the positioning seat (41) has a limiting flange (411), in the initial position, the limiting flange (411) is arranged on the inner bottom of the bottom cover (12).
8. The air contact module for an indentation instrument of claim 3, wherein: the positioning seat (41) has a stop step surface (412), in the test position, the stop step surface (412) is in abutment with the connecting piece (13).
9. The air contact module for a notch press according to claim 8, wherein: the connecting piece (13) extends to the direction of the bottom cover (12) to form a mounting sleeve (131), the positioning switch (6) extends into the mounting sleeve (131), and in the test position, the stop step surface (412) is in abutment with the lower end surface of the mounting sleeve (131).
10. The air contact module for an indentation instrument of claim 1, wherein: the mounting end (11) has an internal thread, and the internal thread is in threaded connection with the pressure sensor (3).