GB/T 18329.4-2021 English PDFUS$339.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 18329.4-2021: Plain bearings - Metallic multilayer plain bearings - Part 4: Non-destructive ultrasonic transmission testing of bond of thickness greater than or equal to 0.3 mm Status: Valid
Basic dataStandard ID: GB/T 18329.4-2021 (GB/T18329.4-2021)Description (Translated English): Plain bearings - Metallic multilayer plain bearings - Part 4: Non-destructive ultrasonic transmission testing of bond of thickness greater than or equal to 0.3 mm Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J12 Word Count Estimation: 18,159 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 18329.4-2021: Plain bearings - Metallic multilayer plain bearings - Part 4: Non-destructive ultrasonic transmission testing of bond of thickness greater than or equal to 0.3 mm---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Plain bearings - Metallic multilayer plain bearings - Part 4.Non-destructive ultrasonic transmission testing of bond of thickness greater than or equal to 0.3 mm ICS 21.100.10 J12 National Standards of People's Republic of China Multi-layer metal sliding bearings Part 4.Alloy thickness ≥ 0.3mm Combined quality ultrasonic penetration non-destructive testing Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee Table of contentsForeword Ⅲ 1 Scope 1 2 Normative references 1 3 Symbols and abbreviations 1 4 Detection method 2 4.1 Testing of radial sliding bearings 2 4.2 Testing of thrust flanges and flat guide rails 3 5 Detection system 4 5.1 Ultrasonic flaw detector 4 5.2 Liquid immersion probe 4 5.3 Comparison test block 4 5.4 Instrument calibration and system comprehensive performance test 4 6 Personnel qualifications 5 7 Test procedure 5 7.1 Workpiece surface requirements 5 7.2 Testing system debugging 5 7.3 Product testing 7 7.4 Checking the detection sensitivity 7 7.5 Setting of instrument parameters and detection speed 7 8 Combining defect judgment 7 8.1 Discrimination based on penetration wave height 7 8.2 Combining defect classification 8 9 Defect display and marking 9 9.1 Defect alarm 9 9.2 Automatic display and recording 9 9.3 Manual recording 9 10 Marking on the product image 9 11 Test report 9 Appendix A (normative appendix) Comparison test block 10 Appendix B (informative appendix) Test report 13ForewordGB/T 18329 "Multilayer Metal Sliding Bearings for Sliding Bearings" is divided into the following 4 parts. ---Part 1.Ultrasonic non-destructive testing of bond strength; ---Part 2.Destructive test of bond strength of alloy thickness ≥ 2mm; ---Part 3.Non-destructive penetration inspection; ---Part 4.Ultrasonic penetration non-destructive testing of the bonding quality of alloy thickness ≥ 0.3mm. This part is Part 4 of GB/T 18329. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part was proposed by China Machinery Industry Federation. This part is under the jurisdiction of the National Sliding Bearing Standardization Technical Committee (SAC/TC236). Drafting organizations of this section. Hefei Bolin New Materials Co., Ltd., China Machinery Productivity Promotion Center, Shanghai Institute of Materials, Yantai Dafeng Bearing Co., Ltd., Chengdu Shengsanqiang Railway Fittings Co., Ltd., Changzhou Ultrasonic Electronics Co., Ltd., Jinhua Chengkai Alloy Material Co., Ltd. Company, Taiyuan Heavy Industry Co., Ltd. Oil Film Bearing Branch, Hubei Anda Precision Industry Co., Ltd., Yixing Huanyu Bearing Manufacturing Co., Ltd. Company, Zhejiang Changsheng Sliding Bearing Co., Ltd., Zhejiang Shuangfei Oilless Bearing Co., Ltd., Zhejiang Xianfeng Auto Parts Co., Ltd. This part is explained by the National Technical Committee for Standardization of Sliding Bearings. Multi-layer metal sliding bearings Part 4.Alloy thickness ≥ 0.3mm Combined quality ultrasonic penetration non-destructive testing1 ScopeThis part of GB/T 18329 specifies the test method for determining the bonding quality between the bearing alloy and the backing by the liquid immersion ultrasonic penetration method. This section specifies the evaluation of the receiving probe placed on the outside of the backing to receive the penetrating wave emitted by the transmitting probe inside the alloy layer method. If the transmitting probe is outside and the receiving probe is inside, the signal processing method is the same. This part is applicable to flangeless bearings and bushings with alloy layer thickness ≥0.3mm and inner diameter ≥40mm with copper backing and steel backing, as well as alloy layer The combined quality inspection of thrust flange with copper back and steel back and flat guide rail type rectangular sliding bearing with thickness ≥ 0.3mm. Cast iron backing bearings Refer to this section. Due to the inner chamfer at both ends of the sliding bearing and its vicinity, the edge of the facing surface, the oil hole, the oil pocket, the oil groove, the positioning lip and other structures, as well as the dovetail groove There are uncertain reflection waves on the edges of both sides, which affect the intensity of the penetration waves, so this method is not suitable for the detection of such areas. These parts Refer to GB/T 18329.3 for the evaluation method of bonding quality between backing and alloy layer. This section only makes a qualitative evaluation of the quality of the combination of the bearing backing and the alloy layer. The penetration wave height of ultrasonic passing through the backing and alloy bonding surface As a basis for evaluating the quality of the combination.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 9445 Qualification and certification of non-destructive testing personnel GB/T 18329.3 Sliding Bearings Multilayer Metal Sliding Bearings Part 3.Non-destructive Penetration Inspection JB/T 10061 A-type pulse reflection ultrasonic flaw detector general technical conditions JB/T 12466 General Specification for Ultrasonic Probes for Nondestructive Testing3 Symbols and abbreviationsThe symbols and abbreviations given in Table 1 apply to this document. Table 1 Symbols and abbreviations 5.4.2 The automatic ultrasonic testing system should be tested regularly for comprehensive system performance, and the test cycle should be negotiated between the manufacturer and the user. 5.4.3 The automatic ultrasonic testing system should generally meet the following performance index requirements. ---The smallest defect diameter is less than 2mm; ---Indication error of detection of artificial defect area. -10%Ath≤(Ath-Am)/Ath×100%≤10%Ath; ---System stability. After the system has been working continuously for 24h, the detection sensitivity shall not fluctuate more than 2dB compared with that before 24h.6 Personnel qualificationsThe personnel who perform ultrasonic testing according to this part shall be qualified and certified in accordance with GB/T 9445, and obtain the relevant industrial doors of ultrasonic testing. Class qualification level certificate.7 Testing procedures7.1 Workpiece surface requirements The surface of the workpiece to be inspected must not have local depressions and protrusions that affect the inspection; the surface roughness of the alloy layer and the backing surface Ra≤3.2μm; safety The surface roughness of the mounting surface Ra≤6.3μm; the workpiece to be inspected should be cleaned and wiped. 7.2 Testing system debugging 7.2.1 According to the requirements of Appendix A, enter the relevant parameters of the comparison test block. 7.2.2 Place the comparison test block that meets the requirements of 5.3 on the workpiece positioning device. 7.2.3 According to the thickness of the test block, adjust the opposite transmitting and receiving probes so that the focus falls on the bonding layer and keep the probes perpendicular to the test block. 7.2.4 Adjust the starting positions of the two probes so that their movement strokes are at least half the probe diameter at both ends of the bearing width B. 7.2.5 Adjust the instrument gain or attenuation so that the penetration wave height h=80%H (see Figure 3) in the best combined area, which is the detection sensitivity. 7.2.6 Automatically scan the artificial defect position of ϕ2mm in the comparison test block, h should be ≤40%H (see Figure 4). Note. For different types of testing equipment, the maximum limit value of h selected through negotiation between the supplier and the buyer can also be used as the basis for defect judgment. 7.2.7 Automatically scan and compare the test block three times, and print the inspection record. The area indication error of each type II artificial defect (type II hole) should meet The provisions of 5.4.3. 7.3 Product testing 7.3.1 Installation of the inspected workpiece Remove the comparison test block and replace it with the product to be inspected. If it is a bearing product, it should be installed in pairs, and according to the free elastic tensor, the two ends should be opposite to each other. Keep approximately equal gaps between them, so that the surface of the inspected workpiece is basically a perfect circle. 7.3.2 Workpiece scan Start the inspection system equipment to drive the coordinated movement of the inspected workpiece and the probe to scan the workpiece to ensure 100% coverage of the inspected surface. The scanning parameters are as follows. a) When the workpiece is rotating, the probe moves continuously or intermittently in the axial direction of the workpiece, and the scanning overlap width is greater than or equal to the focus of the probe. 20% of zone width or beam diameter. b) When the workpiece is moving in a straight line, the probe will make a transverse intermittent movement parallel to the surface of the workpiece after the workpiece has completed a longitudinal stroke, and the scanning will be repeated. Stack width ≥ 20% of the focal zone width of the focus probe or the diameter of the sound beam. c) On the premise that the detection sensitivity and system performance requirements are met, the scanning parameters can also be determined through negotiation. 7.4 Checking the detection sensitivity 7.4.1 Workpiece detection every 2h and at the end of each day, the detection sensitivity of the system should be checked with a comparison test block. Combine the most The penetration wave height in the good area shall not drop more than 2dB from the beginning. Otherwise, the equipment should be re-commissioned and tested, and the The workpieces inspected after the last inspection are re-inspected. 7.4.2 After the specification of the inspected workpiece is replaced, the key components of the system are replaced, the inspector is changed, the inspection parameter is changed, and the system failure is repaired, All need to check the detection sensitivity and other performance parameters. 7.5 Setting of instrument parameters and detection speed In the process of testing system debugging, product testing, and testing sensitivity verification, the instrument parameters and testing speed should be consistent.8 Combining defect identification8.1 Judging based on the penetration wave height When the penetration wave height of the inspected area h≤40%H (see Figure 5), it is regarded as a combined defect area, and the defect is determined by this area range area. Note. For different types of testing equipment, the maximum limit value of h selected through negotiation between the supplier and the buyer can also be used as the basis for defect judgment.9 Defect display and marking9.1 Defect alarm It is advisable to set up an automatic alarm function. Once the penetration wave height reaches the set defect range, the instrument will immediately sound and light alarm. 9.2 Automatic display and recording Priority is given to automatic display and recording to realize computer control, real-time display of test results, and test record printing. Displaying and recording The exact position of the single largest defect should be marked---the X and Y coordinate values on the scan area diagram, as well as the single largest defect area and total Defect area, etc.; unqualified is marked with waste identification. (see Appendix B for the record format). 9.3 Manual record For products specified as Class A defects, automatic recording may not be performed. Only for products that are judged to have combined defects, use manual waste 10 Marks on the product image According to this section, the bearing defect level is expressed as follows. Level B2 defects. test GB/T 18329.4 B2 11 Test report The test report should include the following. a) Testing standards; b) Bearing dimensions and materials; c) Ultrasonic flaw detector model and number; d) Probe model and serial number; e) The pulse repetition frequency of the ultrasonic flaw detector and the detection speed of the detection system; f) Test results. batch number, qualified number, number of various defects and brief description of the situation; g) Bearing manufacturer; h) Testing personnel, qualifications and testing date; i) For all bearings with combined defects that exceed the standard, an inspection report with automatic recording graphics should be given (see Appendix B). ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 18329.4-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 18329.4-2021_English as soon as possible, and keep you informed of the progress. 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