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 yqgm@yongqiang-group.com ;sales@yongqiang-group.com

Compression spring geometry size detection

by:Yongqiang     2020-09-21
Compression spring geometry inspection compression spring geometry size of project, and the representative, the following are expounded in detail the test methods and requirements.


1. Inspection of the diameter of the spring material testing spring material with vernier caliper or dry points feet in diameter, and may, when necessary, USES the tool microscope, such as measuring a finer wire diameter or non circular cross section shape and so on. To adopt automatic spring coiling machine winding is less to rotate and annealing state alloy spring steel wire, especially should pay attention to the test. This is because increased after feeding force and pressure feeding roller, frequent wire squashed into elliptical, affecting load (smaller) And the spring pressure and height from ( Larger) 。


2. Freedom spring height or the length of the detection of spring generally put in horizontal position measurement, only when confirm the spring stand self-respect had no significant effect of spring height or length, allowed in the upright position measurement. Spring free height or length H0 & gt; 500 mm in the ordinary steel tape measure, in addition to free height measurement by common measuring tool, in batch production often use separator height gage or free height detection. The tolerances of the freedom spring height or length according to the provisions of the national standard. When spring characteristics requirement, free height or length as a reference.


3. Spring in the test pattern with outer diameter and the diameter of the diameter size of the spring, the measured diameter size shall prevail, pattern with inner diameter of the spring, the measured diameter size shall prevail, pattern along with spring inside, middle and outer diameter, more than any one in the measured diameter size shall prevail. Variable diameter spring besides pattern has special provisions, to measure the ends a quarter the size of the circle position shall prevail. Spring diameter measurement, use vernier caliper, one of the measurements at least should be brought into contact with two spring coil, measure the claw should maintain vertical position with the end ring plane. The measured maximum points shall prevail when measuring diameter, measuring inner diameter, the measured minimum point shall prevail. When spring production batch big, inspection can adopt special spring spindle sleeve or inspection. Use the sleeve or spindle can find spring damping swell and shrink and burr and other quality problems. Some situations can also be used with a certain length of sleeve or spindle ( Also known as test sample ring or sample) Can be free to check diameter by spring.


4. The number of spring coil detection, spring the total number of turns of general use visual, when the total number of turns allowed error is less than or equal to 0. 1 lap, using special measuring tool detection. The tolerances of the spring to the total number of laps according to the provisions of the national standard. When required by the properties of spring, total number of turns as a reference.





5. Spring end clearance and side thickness detection of end clearance: insert the feeler from end clearance, just free through shall prevail. End thickness detection: insert spring clearance with a feeler, just plug the shall prevail, slide the tail end of the piece of feet against feeler, feet and perpendicular to the end, measure the thickness of the end.


6. Spring pitch evenness testing in accordance with the efd to calculate full deformation of spring, and then put a spring in load test on compression to the regulation of deformation, and the lights in the spring, according to the pervious to light degree judgment have normal pitch without contact. Hot coil spring quality rating according to the provisions of the JB/JQ26005.


7. Spring pressure and the height of the test will be spring in a load test on measuring the high pressure and to tight. Spring pressure and seven rules not high principle, but face grinding about 3/4 of the spring, when the required pressure and highly H0, its maximum value according to the formula.


8. Detection of face grinding degree of the spring grinding: Angle gauge is used to inspect its face grinding degree. Detection of grinding surface roughness: put spring vertical surface roughness tester test bed, adjusted by the regulation of GB1031 auspicious length, probe into spring grinding sampling, according to the instruction from the instrument to determine the contours of the arithmetic average deviation roughness R value. At risk of grinding surface roughness measurement, allowed to compare with other grinding surface after determination of evaluation, in case of dispute, the roughness tester is measured data shall prevail. On both ends of the coil and tight and flat spring bearing ring grinding flat part is greater than or equal to three-quarters of circle; The roughness R. No more than 12. 5Um. The bucket thick, not small dry 1/8 d


9. Spring verticality of testing spring vertically on the tablet. In the condition of no load, spring rotates to wide Angle square, find the coil spring end with the largest gap between wide seating square ( End to 1/2 of the inspection) adjacent to the second circle With cold feet the size of the measuring gap, one end of the test after the measurement at the other end. Two end face after grinding of spring, in a free state, the spring axis on both ends the vertical degree according to the provisions of the national standard.


10. On both ends of the spring coil of parallelism between testing spring vertically on the tablet, with a dial indicator to measure the circle grinding face value change, its the difference between the maximum and minimum, is the parallel degree of deviation between the spring ring on both ends.


11. Spring straightness inspection will spring placed on the plate, roll a week, determine its maximum bending parts, measured with a feeler of the gap between maximum bend and tablet. The measured gap is the parallel degree of deviation.
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