Railway signal relay contact surface roughness test analysis method
By designing a test analysis method for measuring and analyzing the surface roughness of the contacts of railway signal relays, the problem of unreliable contact between the contacts is solved, and the reliability and safety of signal transmission are improved.
Patent Information
- Application Number
- CN202411812835.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-03-14
AI Technical Summary
The contact between the contacts of the railway signal relay contacts is unreliable, resulting in unstable signal transmission.
By designing a railway signal relay contact surface roughness test analysis method, including enhanced dynamic and static contact surface roughness test analysis method, ordinary static contact surface roughness test analysis method, ordinary dynamic contact surface roughness test analysis method, and contact measurement analysis method and judgment principle of square contact surface roughness. This method ensures that it meets industry standards by measuring and analyzing the surface roughness of the contacts.
It effectively reduces the risk of contact unreliable contacts to relay contacts, and improves the reliability and safety of signal transmission.
Smart Images
Figure CN119618147A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a railway signal relay contact surface roughness testing and analysis technology, in particular to a railway signal relay contact surface roughness testing and analysis method. Background Art
[0002] By measuring surface roughness, the surface characteristics of the product can be fed back to the processing and manufacturing process to help control and optimize the manufacturing process, determine and reflect functional characteristics, and thus realize a closed-loop system of quality control.
[0003] The measurement and characterization of surface morphology plays a bridging role in industry: on the one hand, it connects the production links and helps control the processing technology to produce qualified products; on the other hand, it connects the application links, quantitatively expresses the actual functions of the products, and evaluates the performance of the products. Summary of the invention
[0004] The object of the present invention is to provide a method for testing and analyzing the surface roughness of a railway signal relay contact which can effectively reduce the risk of unreliable contact between the contact and the relay contact.
[0005] The object of the present invention is achieved by a method for testing and analyzing the surface roughness of a railway signal relay contact, comprising: a method for testing and analyzing the surface roughness of a strengthened moving and static contact, a method for testing and analyzing the surface roughness of a common static contact, a method for testing and analyzing the surface roughness of a common moving contact, and a contact measurement and analysis method and determination of the surface roughness of a square contact: 1) Strengthen the contact test analysis method of the surface roughness of the dynamic and static contacts. The sampling length and evaluation length are determined according to the size of the rivet-type contact for measurement and analysis: including the following steps: a) Place the rivet-type contact in the corresponding socket of the fixed fixture, ensuring that the contact surface to be tested remains horizontal and static; b) Place the front end of the roughness tester sensor on the contact surface to be tested (avoid sliding after contact to protect the sensor), and start measuring after the sensor position display mark is at the center of the coordinate axis; c) For the contact surface diameter less than 2mm, set the sampling length to 0.08mm and the evaluation length to 5 times the sampling length. Randomly select 10 locations for testing and record the test data in detail; d) For the contact surface diameter greater than 2mm, set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length. Test in four directions with an angle of 90° between each direction, and record the test data in detail; e) Compare the roughness data tested in the above two ways with the roughness value specified in the drawing. If one of the data is found to be greater than the value required by the drawing, it will be judged as unqualified.
[0006] 2) The contact test and analysis method of the surface roughness of ordinary static contacts is mainly due to the particularity of the contact shape. The measurement and analysis steps are: a) Place the silver wire contact in the corresponding socket of the fixed fixture, ensuring that the contact surface to be tested remains horizontal and static; b) Place the front end of the roughness tester sensor on the contact surface to be tested, and start measuring after the sensor position display mark is at the center of the coordinate axis; c) Set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length, and test in four directions with an angle of 90° between each direction. Record the test data in detail; d) In view of the particularity of the material and processing of the silver wire contact, try to avoid external interference and slight movement of the sample during the test to ensure the accuracy and stability of the test results; e) Compare the tested roughness data with the roughness value specified in the drawing. If one of the data is found to be greater than the value required by the drawing, it will be judged as unqualified.
[0007] 3) The contact test and analysis method of the surface roughness of the ordinary moving contact is mainly due to the particularity of the contact shape. The measurement and analysis steps are: a) Place the question mark-shaped contact in the corresponding socket of the fixed fixture, ensuring that the contact surface to be tested remains horizontal and static; b) Place the front end of the roughness tester sensor on the contact surface to be tested, and start measuring after the sensor position display mark is at the center of the coordinate axis; c) Set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length, perform linear testing along the direction of actual application, and record the test data in detail; d) In view of the particularity of the question mark-shaped contact structure and processing, try to avoid external interference and slight movement of the sample during the test to ensure the correctness and stability of the test results; e) Compare the tested roughness data with the roughness value specified in the drawing. If one of the data is found to be greater than the value specified in the drawing, it is judged as unqualified; 4) The contact analysis method for the surface roughness test of the square contact is mainly due to the particularity of the contact shape. The measurement and analysis steps are: a) Place the square contact in the corresponding socket of the fixed fixture, ensuring that the contact surface to be tested remains horizontal and static; b) Place the front end of the roughness tester sensor on the contact surface to be tested, and start measuring after the sensor position display mark is at the center of the coordinate axis; c) Set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length, test in 6 directions, and record the test data in detail; d) In view of the particularity of the material and processing of the square contact, try to avoid external interference and slight movement of the sample during the test to ensure the accuracy and stability of the test results; e) Compare the tested roughness data with the roughness value specified in the drawing. If one of the data is found to be greater than the value required by the drawing, it will be judged as unqualified.
[0008] The present invention has the following beneficial effects and advantages: 1. The present invention systematically summarizes the roughness test method and judgment principle of railway signal relay contacts.
[0009] 2. By testing the roughness of the relay contacts, the surface quality of the raw materials of the contacts can be determined, which can effectively reduce the risk of unreliable contact between the contacts and the relay contacts.
[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention is further described below in conjunction with the accompanying drawings of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the appearance of a rivet-type contact; Figure 2 It is a schematic diagram of the appearance of the silver wire type contact; Figure 3 It is a schematic diagram of the appearance of a question mark-shaped contact; Figure 4 This is a schematic diagram of the square contact test. DETAILED DESCRIPTION
[0012] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The described drawings only represent several embodiments implemented based on the technical solution of the present invention. Detailed implementation methods and specific operation processes are given, but the application scope of the present invention is not limited to the following embodiments.
[0013] The invention relates to a method for testing and analyzing the surface roughness of a railway signal relay contact, comprising: a method for testing and analyzing the surface roughness of reinforced moving and static contacts (rivet type), a method for testing and analyzing the surface roughness of ordinary static contacts (silver line type), a method for testing and analyzing the surface roughness of ordinary moving contacts (question mark type), and a contact measurement and analysis method and judgment principle for the surface roughness of square contacts.
[0014] like Figures 1 to 4As shown, the present invention provides four implementation cases of rivet-type contacts, silver-wire-type contacts, question-mark-type contacts and square-type contacts. The test and analysis content includes: the surface roughness and judgment principle of ordinary moving contacts (question-mark-type), ordinary static contacts (silver-wire-type), reinforced moving and static contacts (rivet-type) and square contacts of railway signal relays. The method aims to ensure that the surface quality of railway signal relay contacts meets industrial standards through precise measurement and analysis, thereby ensuring the reliability and safety of railway signal systems.
[0015] 1) Reference Figure 1 As shown, the sampling length and the evaluation length are mainly determined according to the size of the rivet-type contact for measurement and analysis. The present invention provides a contact-type test and analysis method for strengthening the surface roughness of dynamic and static contacts (rivet type), including the following steps: a). Place the rivet-type contact in the corresponding socket of the fixed fixture to ensure that the contact surface to be tested remains horizontal and static; b). Place the front end of the roughness tester sensor on the contact surface to be tested (avoid sliding after contact to protect the sensor), and start measuring after the sensor position display mark is at the center of the coordinate axis; c). For the contact surface diameter less than 2mm, set the sampling length to 0.08mm and the evaluation length to 5 times the sampling length. Take 10 points at random for testing and record the test data in detail; d). For the contact surface diameter greater than 2mm, set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length. Test in four directions with an angle of 90° between each direction, and record the test data in detail; e). Compare the roughness data tested in the above two ways with the roughness value specified in the drawing. If one of the data is found to be greater than the value required by the drawing, it will be judged as unqualified.
[0016] 2) Reference Figure 2 As shown, mainly because of the particularity of the contact shape, it is measured and analyzed. The present invention provides a contact test and analysis method for the surface roughness of a common static contact (silver line type), comprising the following steps: a). Place the silver wire contact in the corresponding socket of the fixed fixture, and ensure that the contact surface to be tested remains horizontal and static; b). Place the front end of the roughness tester sensor on the contact surface to be tested (avoid sliding after contact to protect the sensor), and start measuring after the sensor position display mark is at the center of the coordinate axis; c). Set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length, test in four directions with an angle of 90° between each direction, and record the test data in detail; d). In view of the particularity of the material and processing of the silver wire contact, try to avoid external interference and slight movement of the sample during the test to ensure the correctness and stability of the test results; e). Compare the tested roughness data with the roughness value specified in the drawing. If one of the data is found to be greater than the value required by the drawing, it will be judged as unqualified.
[0017] 3) Reference Figure 3 As shown, mainly because of the particularity of the contact shape, it is measured and analyzed. The present invention provides a contact test and analysis method for the surface roughness of a common moving contact (question mark type), including the following steps: a). Place the question mark-shaped contact in the corresponding socket of the fixed fixture, and ensure that the contact surface to be tested remains horizontal and static; b). Place the front end of the roughness tester sensor on the contact surface to be tested (avoid sliding after contact to protect the sensor), and start measuring after the sensor position display mark is at the center of the coordinate axis; c). Set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length, perform linear testing along the direction of actual application, and record the test data in detail; d). In view of the particularity of the question mark contact structure and processing, try to avoid external interference and slight movement of the sample during the test to ensure the correctness and stability of the test results; e). Compare the tested roughness data with the roughness value specified in the drawing. If one of the data is found to be greater than the value required by the drawing, it will be judged as unqualified.
[0018] 4) Reference Figure 4 As shown, due to the particularity of the square contact shape, it is measured and analyzed. The present invention provides a contact analysis method for testing the surface roughness of the square contact, including the following steps: a). Place the square contact in the corresponding socket of the fixed fixture to ensure that the contact surface to be tested remains horizontal and static; b). Place the front end of the roughness tester sensor on the contact surface to be tested (avoid sliding after contact to protect the sensor), and start measuring after the sensor position display mark is at the center of the coordinate axis; c). Set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length, test in 6 directions, and record the test data in detail; d). In view of the particularity of the material and processing of the square contact, try to avoid external interference and slight movement of the sample during the test to ensure the correctness and stability of the test results; e). Compare the tested roughness data with the roughness value specified in the drawing. If one of the data is found to be greater than the value required by the drawing, it will be judged as unqualified.
[0019] The embodiments described in detail above are preferred specific embodiments of the present invention. It should be understood that a person skilled in the art can make various modifications and adjustments based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.
Claims
1. A method for testing and analyzing the surface roughness of a railway signal relay contact, comprising: Strengthen the test and analysis methods for the surface roughness of moving and static contacts, the test and analysis methods for the surface roughness of ordinary static contacts, the test and analysis methods for the surface roughness of ordinary moving contacts, and the contact measurement and analysis methods and judgments for the surface roughness of square contacts: 1) Strengthen the contact test analysis method of the surface roughness of the dynamic and static contacts. The sampling length and evaluation length are determined according to the size of the rivet-type contact for measurement and analysis: including the following steps: a) Place the rivet-type contact in the corresponding socket of the fixed fixture, ensuring that the contact surface to be tested remains horizontal and static; b) Place the front end of the roughness tester sensor on the contact surface to be tested (avoid sliding after contact to protect the sensor), and start measuring after the sensor position display mark is at the center of the coordinate axis; c) For the contact surface diameter less than 2mm, set the sampling length to 0.08mm and the evaluation length to 5 times the sampling length. Randomly select 10 locations for testing and record the test data in detail; d) For the contact surface diameter greater than 2mm, set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length. Test in four directions with an angle of 90° between each direction, and record the test data in detail; e) Compare the roughness data tested in the above two ways with the roughness value specified in the drawing. If one of the data is found to be greater than the value required by the drawing, it is judged as unqualified; 2) The contact test and analysis method of the surface roughness of ordinary static contacts is mainly due to the particularity of the contact shape. The measurement and analysis steps are: a) Place the silver wire contact in the corresponding socket of the fixed fixture, ensuring that the contact surface to be tested remains horizontal and static; b) Place the front end of the roughness tester sensor on the contact surface to be tested, and start measuring after the sensor position display mark is at the center of the coordinate axis; c) Set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length, and test in four directions with an angle of 90° between each direction. Record the test data in detail; d) In view of the particularity of the material and processing of the silver wire contact, try to avoid external interference and slight movement of the sample during the test to ensure the correctness and stability of the test results; e) Compare the tested roughness data with the roughness value specified in the drawing. If one of the data is found to be greater than the value specified in the drawing, it is judged as unqualified; 3) The contact test and analysis method of the surface roughness of the ordinary moving contact is mainly due to the particularity of the contact shape. The measurement and analysis steps are: a) Place the question mark-shaped contact in the corresponding socket of the fixed fixture, ensuring that the contact surface to be tested remains horizontal and static; b) Place the front end of the roughness tester sensor on the contact surface to be tested, and start measuring after the sensor position display mark is at the center of the coordinate axis; c) Set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length, perform linear testing along the direction of actual application, and record the test data in detail; d) In view of the particularity of the question mark-shaped contact structure and processing, try to avoid external interference and slight movement of the sample during the test to ensure the correctness and stability of the test results; e) Compare the tested roughness data with the roughness value specified in the drawing. If one of the data is found to be greater than the value specified in the drawing, it is judged as unqualified; 4) The contact analysis method for the surface roughness test of the square contact is mainly due to the particularity of the contact shape. The measurement and analysis steps are: a) Place the square contact in the corresponding socket of the fixed fixture, ensuring that the contact surface to be tested remains horizontal and static; b) Place the front end of the roughness tester sensor on the contact surface to be tested, and start measuring after the sensor position display mark is at the center of the coordinate axis; c) Set the sampling length to 0.25mm and the evaluation length to 5 times the sampling length, test in 6 directions, and record the test data in detail; d) In view of the particularity of the material and processing of the square contact, try to avoid external interference and slight movement of the sample during the test to ensure the accuracy and stability of the test results; e) Compare the tested roughness data with the roughness value specified in the drawing. If one of the data is found to be greater than the value required by the drawing, it will be judged as unqualified.
2. The method for testing and analyzing the surface roughness of a railway signal relay contact according to claim 1 is characterized in that: The common moving contact is a question mark type moving contact.
3. The method for testing and analyzing the surface roughness of a railway signal relay contact according to claim 1 is characterized in that: The common static contact is a silver wire type static contact.
4. The method for testing and analyzing the surface roughness of a railway signal relay contact according to claim 1 is characterized in that: The reinforced moving and static contacts are rivet-type moving contacts.