A Calculation Method of the Process Parameters for Strengthening Shot Peening of Cylindrical Gears
A technology of process parameters and calculation methods, applied in the direction of strength characteristics, testing material strength by applying repeated force/pulsation force, instruments, etc., can solve problems such as inability to completely eliminate blind areas of strong spraying, long time for intensive shot peening, unstable quality, etc. , to achieve the effect of improving the efficiency of intensive shot peening, precise control of consistency, and avoiding blind areas of strong spraying
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Embodiment 1
[0037] see figure 1 As shown, the present invention is a calculation method of cylindrical gear strengthening shot peening process parameters, and the specific implementation is as follows:
[0038] Step S1, according to the design requirements of the selected cylindrical gear, determine its preset shot peening intensity A 0 =0.55A, the preset coverage rate is greater than or equal to 200%;
[0039] Step S2, select a spray gun with a spray gun diameter of d=10mm, and when carrying out the process test, first select the rotary speed RPM=10r / min, then according to the calculation formula of the Z-axis moving speed v:
[0040] v=10×10=100mm / min
[0041] Step S3, measure the part tooth width L of the clamping arc height A test piece S After = 100mm, first set the air pressure P = 0.40MPa, the shot peening flow M = 10kg / min, the spray gun distance i = 150mm, and perform 10 times of intensive shot peening on the arc height A test piece, and the shot peening times of 10 times of ...
Embodiment 2
[0046]By adjusting air pressure and spray gun distance, set air pressure P=0.45MPa, shot peening flow M=10kg / min, spray gun distance i=120mm, repeat the process test of embodiment 1, process test data are shown in Table 2;
[0047] Table 2 Process test results
[0048]
[0049] As can be seen from the results in Table 2, the eighth measured shot peening intensity A 8 Compared with the measured shot peening intensity A of the 4th time 4 The ratio is less than 1.1, this group of process parameters reached the saturation point when the cycle was 4 times, the measured shot peening intensity A 4 =0.56A, greater than the preset shot peening intensity A 0 =0.55A, so as to determine the air pressure P=0.45MPa, shot peening flow M=10kg / min, and spray gun distance i=120mm for the process test;
[0050] Step S4, under the same material, surface hardness and shot peening intensity as the metal part to be processed, select the turning diameter D M =400mm, part tooth width L M = 100...
Embodiment 3
[0061] In order to verify the accuracy of the calculation method, a metal part with the same material composition and surface hardness as the simulated sample is selected, and the preset shot peening intensity A is required 0 = 0.55A, the preset coverage rate is greater than or equal to 200% of the metal parts of any rotary diameter for verification, taking the rotary diameter and part tooth width as 330×230mm as an example, substituting the calculation formula of the rotary speed RPM can be obtained:
[0062]
[0063] Actual turntable speed RPM S The value is the integer part of the theoretical calculation value, and the actual rotation speed of the turntable is RPM S =7r / min, substituting into the calculation formula of Z-axis moving speed v can get:
[0064] v=10×7=70mm / min
[0065] Actual Z-axis moving speed v S The value is 90-95% of the theoretical calculation value, then the actual Z-axis speed v S =65mm / min, substituting into the calculation formula of shot peen...
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