Mixed gear grinding method for large-specification gear working procedure

Abstract

The invention discloses a mixed gear grinding method for a large-specification gear working procedure, and relates to the technical field of gear machine tools. In order to solve the problems of uneven accurate grinding of left and right tooth surfaces and the like caused by complex grinding influence factors and large fluctuation between grinding processes in China at present, the invention provides a large-specification gear working procedure mixed tooth grinding method which is used for semi-accurate grinding and accurate grinding processes of a large-specification gear grinding machine tool. A circle of teeth of a gear are equally divided into several required parts, two tooth grooves are ground on each part one by one, all parts of a gear ring are ground, the gear ring is rotated by one circle along with the grinding, then two tooth grooves adjacent to the ground tooth grooves are ground, and the teeth are ground in sequence and step by step. And after the uniform distribution grinding process is selected, two tooth grooves of each part are semi-finely ground, then two same tooth grooves of each part are finely ground, and then other teeth are continuously ground until all the teeth are ground. According to the method provided by the invention, the time interval between semi-fine grinding and fine grinding is reduced, the influence of process system errors such as turntable repeated precision and thermal error on the position of the grinding wheel relative to the tooth space is reduced, and the tooth pitch precision and the tooth grinding efficiency of large gear grinding are improved.

Description

Technical Field

[0001] The present invention relates to a gear grinding process for gear machine tools, and specifically to a method for hybrid grinding of large-sized gear processes. Background Art

[0002] When forming and grinding gears, the general process is divided into rough grinding, semi-finish grinding, and finish grinding. Generally, for semi-finish grinding, 1 - 2 passes are made, and the normal grinding allowance per side of the tooth surface for each pass is 0.01 - 0.02 mm; for finish grinding, 1 - 2 passes are made, and the normal grinding allowance per side of the tooth surface for each pass is 0.005 - 0.015 mm.

[0003] Due to the influence of factors such as the repeatability accuracy of the rotary table, workpiece thermal deformation, and machine tool thermal deformation, the left and right positions of the grinding wheel and the same tooth groove relative to the previous pass fluctuate, resulting in unequal grinding allowances for the left and right tooth surfaces. For example, when the gear diameter is 6 m and the repeat positioning accuracy is 2″, the position fluctuation of the grinding wheel relative to the tooth groove is approximately 0.03 mm. At this time, during finish grinding, the grinding allowance of one tooth surface is small, and that of the other tooth surface is large; it is even possible that one surface cannot be ground, which may lead to problems such as poor tooth surface machining quality, grinding burns, and reduced machining accuracy.

[0004] This problem is particularly obvious when grinding large-sized gears with a diameter of more than 5 meters. One way to deal with it is to increase the number of strokes during finish grinding, increase the grinding allowance for each pass, and at the same time, the first stroke is manually retracted by a certain amount to avoid grinding burns in the first stroke. This method will increase the number of strokes in finish grinding, greatly reduce the processing efficiency, and at the same time, the grinding accuracy will also be reduced due to the wear of the grinding wheel. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for hybrid grinding of large-sized gear processes to solve the problems of uneven left and right allowances, grinding burns, and reduced machining accuracy during finish grinding of large-sized gears with a diameter of more than 5 meters mentioned in the above background art.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A method for hybrid grinding of large-sized gear processes includes the following steps:

[0008] Step 1: First, through the rough grinding process, the gear is ground to remove material until the remaining normal allowance per side is 0.05 mm - 0.20 mm.

[0009] Step 2: The grinding method is selected as uniform distribution grinding. The tooth grooves are equally divided and rounded down, so that the extra tooth grooves will be in the middle between the first part and the last part.

[0010] num_k = floor(z / n)

[0011] odd_k = mod(z / n)

[0012] r = floor(num_k / 2)

[0013] odd_t = mod(num_k / 2)

[0014] Where floor is rounding down, num_k is the rounded number of teeth per part, n is the number of equal divisions, generally selected between 4 and 8, r is the number of turns of the gear ring rotating and rounding down, mod is the remainder function, if odd_k = 0, it is even, if odd_k = 1, it is odd, and odd_t is the same.

[0015] Step 3: Based on uniform grinding, first perform semi - finishing grinding, and grind 2 tooth grooves of each part in sequence.

[0016] Step 4: Then perform finishing grinding, and continue to grind the same 2 tooth grooves that were ground in semi - finishing grinding in Step 3.

[0017] Step 5: Then, through the uniform grinding process, grind in sequence according to Step 3 and Step 4 to grind all the tooth grooves.

[0018] Step 6: If there is still stock on the single - side normal of the tooth surface, the finishing grinding process can be selected to grind off the stock.

[0019] The specific steps of Step 2 are as follows:

[0020] Step 2 - 1: For each portion, first grind 2 adjacent tooth grooves, and then grind the next portion. When the gear rotates one circle, all portions of the gear have tooth grooves ground.

[0021] r = 1

[0022] park1_k1 = c1

[0023] park1_k2 = c1 + 360 / z

[0024] park2_k3 = c1 + 360 / z * num_k

[0025] park2_k4 = c1 + 360 / z * (num_k + 1)

[0026] LL

[0027] park(m)_k(2m - 1) = c1 + 360 / z * num_k * (m - 1)

[0028] park(m)_k(2m) = c1 + 360 / z * (num_k * (m - 1)+1)

[0029] Where r = 1, representing the first circle, k1 is the tooth numbered 1, c1 is the angle of the initial tooth No. 1, n is the number of equal parts, z is the number of tooth grooves, and m is the m-th part.

[0030] Step 2-2: Next, continue to grind 2 unground tooth grooves adjacent to the ground tooth grooves in the first part;

[0031] r = 2

[0032] park1_k(2n + 1) = c1 - 360 / z

[0033] park1_k(2n + 2) = c1 + 360 / z * 2

[0034] park2_k(2n + 3) = c1 + 360 / z * (num_k - 1)

[0035] park2_k(2n + 4) = c1 + 360 / z * (num_k + 2)

[0036] LL

[0037] park(m)_k(2n + 2m - 1) = c1 + 360 / z * (m - 1) * (num_k - 1)

[0038] park(m)_k(2n + 2m) = c1 + 360 / z * ((m - 1) * num_k + 2)

[0039] Where r = 2, representing the second circle, k1 is the tooth numbered 1, c1 is the angle of the initial tooth No. 1, n is the number of equal parts, z is the number of tooth grooves, and m is the m-th part.

[0040] Step 2-3: Then grind two unground tooth grooves adjacent to the ground tooth grooves in the next part. The gear rotates one circle, and all parts have tooth grooves ground. Grind them in sequence until all tooth grooves of the gear have been ground, i.e., the uniform grinding ends;

[0041] r = t

[0042] park1_k((r - 1) * 2n + 1) = c1 - 360 / z * (r - 1)

[0043] park1_k((r - 1) * 2n + 2) = c1 + 360 / z * (r)

[0044] park2_k((r - 1) * 2n + 3) = c1 + 360 / z * (num_k - (r - 1))

[0045] park2_k((r - 1) * 2n + 4) = c1 + 360 / z * (num_k + r)

[0046] LL

[0047] park(m)_k((r - 1)*(2n + m)-1)=c1 + 360 / z*((m - 1)*num_k-(r - 1))

[0048] park(m)_k((r - 1)*(2n + m))=c1 + 360 / z*((m - 1)*num_k + r)

[0049] In the formula, r = t, representing the t-th circle, k1 is the tooth with serial number 1, c1 is the angle of the initial tooth No. 1, n is the number of equal parts, z is the number of tooth grooves, and m is the m-th part.

[0050] Step 2 - 4: If odd_t is odd, then perform Step 2 - 4 to carry out the machining of the (t + 1)-th circle. In Step 2 - 4, if odd_k is odd, then perform the (n + 1)-th part, that is, machine in the middle of the first part and the last part. Finally, machine all the teeth of the gear;

[0051] r = t + 1

[0052] if odd_t == 1

[0053] park1_k((r - 1)*2n + 1)=c1 + 360 / z*(r)

[0054] park2_k((r - 1)*2n + 2)=c1 + 360 / z*(num_k + r)

[0055] LL

[0056] park(m)_k((r - 1)*(2n + m))=c1 + 360 / z*((m - 1)*num_k + r)

[0057] end

[0058] if odd_k == 1

[0059] s = z - num_k*n

[0060] park(n + 1)_k((r - 1)*(3n)+1)-c1 + 360 / z*(n*num_k + 1)

[0061] LL

[0062] park(n + 1)_k((r - 1)*(3n)+s)=c1 + 360 / z*(n*num_k + s)

[0063] end

[0064] Where r = t + 1, representing the (t + 1)-th circle, k1 is the tooth numbered 1, c1 is the angle of the initial tooth No. 1, n is the number of equal parts, z is the number of tooth grooves, m is the m-th part, and s is the remaining teeth after rounding the gear.

[0065] In the second step, in the uniform grinding method, the gear tooth grooves are equally divided, and 2 tooth grooves of each part are ground in sequence.

[0066] In the second step, in the uniform grinding method, after the second circle starts, two tooth grooves adjacent to the tooth grooves ground in the previous circle are ground in sequence.

[0067] In the fourth and fifth steps, first, a semi-finishing grinding is carried out for one circle, and 2 tooth grooves of all uniformly distributed parts of the gear have been ground. Then, a finishing grinding is selected and carried out on the ground tooth grooves. Grinding is carried out in sequence until all tooth grooves are ground, that is, the grinding of the gear mixing process is completed.

[0068] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0069] This process method of the present invention can reduce the time interval between semi-finishing grinding and finishing grinding of the same tooth groove, reduce the influence of process system errors such as the repeatability accuracy and thermal error of the turntable on the relative position of the grinding wheel to the tooth groove, and improve the pitch accuracy and grinding efficiency of large-scale gear grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 is a flowchart of a method for hybrid grinding of large-scale gear processes of the present invention;

[0071] Figure 2 is a flowchart of the uniform grinding of the present invention;

[0072] Figure 3 is a schematic diagram of 36 teeth evenly distributed in 6 for the uniform grinding of the present invention;

[0073] Figure 4 is a schematic diagram of 53 teeth evenly distributed in 8 for the uniform grinding of the present invention;

[0074] Figure 5 is a schematic diagram of 56 teeth evenly distributed in 6 for the uniform grinding of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0075] The technical solutions of the present invention will be clearly and completely described below with reference to the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention. Specific Embodiment 1

[0077] Workpiece parameters: module m = 18, number of teeth z = 36, helix angle beta = 0, tooth thickness b = 100, equally distributed number of teeth n = 6, as Figure 3 shown.

[0078] Step 1: First, through the rough grinding process, grind the gear to remove material until the remaining unilateral normal allowance is 0.10 mm;

[0079] Step 2: Select the equally distributed grinding method, divide the tooth spaces equally, and round down. In this way, the extra tooth spaces will be in the middle of the first part and the last part;

[0080] num_k = floor(36 / 6) = 6

[0081] odd_k = mod(36 / 6) = 0

[0082] t = floor(6 / 2) = 3

[0083] odd_t = mod(6 / 2) = 0

[0084] 1) For each part, first grind the adjacent 2 tooth spaces, and then grind the next part. When the gear rotates one circle, all parts of the gear will have the tooth spaces ground;

[0085] r = 1

[0086] park1_k1 = 0°

[0087] park1_k2 = 0 + 360 / 36 = 10°

[0088] park2_k3 = 0 + 360 / 36*6 = 60°

[0089] park2_k4 = 0 + 360 / 36*(6 + 1) = 70°

[0090] LL

[0091] park(m)_k(2m - 1) = 0 + 360 / 36*6*(m - 1) = 6*(m - 1)*10°

[0092] park(m)_k(2m) = 0 + 360 / 36*(6*(m - 1) + 1) = (6*(m - 1) + 1)*10°

[0093] In the formula, r = 1 represents the first circle, k1 is the tooth with serial number 1, and m is the mth part.

[0094] 2) Next, continue to grind the 2 unground tooth spaces adjacent to the ground tooth spaces in the first part;

[0095] r = 2

[0096] park1_k(12 + 1) = 0 - 360 / 36 = -10°

[0097] park1_k(12 + 2) = 0 + 360 / 36 * 2 = 20°

[0098] park2_k(12 + 3) = 0 + 360 / 36 * (6 - 1) = 50°

[0099] park2_k(12 + 4) = 0 + 360 / 36 * (6 + 2) = 80°

[0100] LL

[0101] park(m)_k(2m + 12 - 1) = 0 + 360 / 36 * (m - 1) * (6 - 1) = (m - 1) * 50°

[0102] park(m)_k(2m + 12) = 0 + 360 / 36 * (m - 1) * (6 + 2) = (m - 1) * 80°

[0103] Where r = 2, representing the second circle, k1 is the tooth with serial number 1, and m is the m-th part.

[0104] 3) Then grind the two unground tooth grooves adjacent to the ground tooth grooves of the next part. The gear rotates one circle, and all parts have tooth grooves ground. Grind them in sequence until all tooth grooves of the gear have been ground, i.e., the uniform grinding ends;

[0105] r = t

[0106] park1_k((r - 1) * 12 + 1) = 0 - 360 / 36 * (r - 1) = -(r - 1) * 10°

[0107] park1_k((r - 1) * 12 + 2) = 0 + 360 / 36 * r = -r * 10°

[0108] park2_k((r - 1) * 12 + 3) = 0 + 360 / 36 * (6 - (r - 1)) = (7 - r) * 10°

[0109] park2_k((r - 1) * 12 + 4) = 0 + 360 / 36 * (6 + r) = (6 + r) * 10°

[0110] LL

[0111] park(m)_k((r - 1) * (12 + m) - 1) = 0 + 360 / 36 * ((m - 1) * 6 - (r - 1))

[0112] park(m)_k((r - 1)*(12 + m)) = 0 + 360 / 36*((m - 1)*6 + r)

[0113] Where r = t, representing the t-th circle, k1 is the tooth numbered 1, and m is the m-th part.

[0114] 4) If both odd_t and odd_k are 0, it means the gear grinding is completed, with a total of 3 circles.

[0115] Step Four: Based on uniform grinding, first semi-finish grind one circle, and sequentially grind 2 tooth grooves of each part, such as Figure 3 tooth grooves 1 - 12;

[0116] Step Five: Then finish grind one circle, and continue to grind the 2 tooth grooves that have been semi-finished ground in Step Four, such as Figure 3 tooth grooves 1 - 12;

[0117] Step Six: Then sequentially grind according to Step Four and Step Five until all tooth grooves are ground. Sequentially grind tooth grooves 13 - 36; Specific Embodiment 2

[0119] Workpiece parameters: module m = 18, number of teeth z = 53, helix angle beta = 8, tooth thickness b = 100. The uniformly distributed number of teeth n = 8, as Figure 4 shown..

[0120] Step One: First, through rough grinding process, grind the gear to remove material until the remaining unilateral normal allowance is 0.10 mm;

[0121] Step Two: Select the grinding method as uniform grinding, divide the tooth grooves equally, and round down. In this way, the extra tooth grooves will be in the middle of the first part and the last part;

[0122] num_k = floor(53 / 8) = 6

[0123] odd_k = mod(53 / 8) = 1

[0124] t = floor(6 / 2) = 3

[0125] odd_t = mod(6 / 2) = 0

[0126] 1) For each part, first grind 2 adjacent tooth grooves, and then grind the next part. When the gear rotates one circle, all parts of the gear have tooth grooves ground;

[0127] r = 1

[0128] park1_k1 = 0°

[0129] park1_k2 = 0 + 360 / 53 = 6.7925°

[0130] park2_k3 = 0 + 360 / 53 * 6 = 40.7547°

[0131] park2_k4 = 0 + 360 / 53 * (6 + 1) = 47.5472°

[0132] LL

[0133] park(m)_k(2m - 1) = 0 + 360 / 53 * 6 * (m - 1) = 6 * (m - 1) * 6.7925°

[0134] park(m)_k(2m) = 0 + 360 / 53 * (6 * (m - 1) + 1) = (6 * (m - 1) + 1) * 6.7925°

[0135] 2) Next, continue to grind the 2 unground tooth grooves adjacent to the first part of the ground tooth grooves;

[0136] r = 2

[0137] park1_k(12 + 1) = 0 - 360 / 53 = -6.7925°

[0138] park1_k(12 + 2) = 0 + 360 / 53 * 2 = 13.5849°

[0139] park2_k(12 + 3) = 0 + 360 / 53 * (6 - 1) = 33.9623°

[0140] park2_k(12 + 4) = 0 + 360 / 53 * (6 + 2) = 54.3396°

[0141] LL

[0142] park(m)_k(2m + 12 - 1) = 0 + 360 / 53 * (m - 1) * (6 - 1) = (m - 1) * 33.9623°

[0143] park(m)_k(2m + 12) = 0 + 360 / 53 * (m - 1) * (6 + 2) = (m - 1) * 54.3396°

[0144] 3) Then grind the two unground tooth grooves adjacent to the next part of the ground tooth grooves. When the gear rotates one circle, all parts have tooth grooves ground. Grind them in turn until all tooth grooves of the gear have been ground, that is, the uniform grinding ends;

[0145] r = t

[0146] park1_k((r - 1)*16 + 1) = 0 - 360 / 53*(r - 1) = -(r - 1)*6.7925°

[0147] park1_k((r - 1)*16 + 2) = 0 + 360 / 53*(r) = -r*6.7925°

[0148] park2_k((r - 1)*16 + 3) = 0 + 360 / 53*(6 - (r - 1)) = (7 - r)*6.7925°

[0149] park2_k((r - 1)*16 + 4) = 0 + 360 / 53*(6 + r) = (6 + r)*6.7925°

[0150] LL

[0151] park(m)_k((r - 1)*(16 + m) - 1) = 0 + 360 / 53*((m - 1)*6 - (r - 1))

[0152] park(m)_k((r - 1)*(16 + m)) = 0 + 360 / 53*((m - 1)*6 + r)

[0153] 4) If odd_t is odd, then perform Step Two - 4, perform the machining of the (t + 1)-th revolution, and odd_t = 0. In Step Two - 4, if odd_k is odd, then perform the (n + 1)-th part, where odd_k = 1. That is, perform the machining between the first part and the last part. Finally, all the teeth of the gear are machined.

[0154] r = t + 1

[0155] s = z - num_k*n = 5

[0156] park(9)_k(r*(16) + 1) = 0 + 360 / 53*(6*8 + 1)

[0157] LL

[0158] park(9)_k(r*(16) + s) = 0 + 360 / 53*(6*8 + s)

[0159] Step Four: Based on the basis of uniform grinding, first semi - finish grind one revolution, and successively grind 2 tooth grooves of each part, such as Figure 4 tooth grooves 1 - 16;

[0160] Step Five: Then finish grind one revolution, and continue to grind the 2 tooth grooves that have been semi - finished ground in Step Four, such as Figure 4 tooth grooves 1 - 16;

[0161] Step 6: Then, perform grinding in accordance with Step 4 and Step 5 in sequence to grind all the tooth grooves. Grind the tooth grooves from groove 17 to groove 53 in sequence; Specific Embodiment 3

[0163] Workpiece parameters: module m = 18, number of teeth z = 56, helix angle beta = 0, tooth thickness b = 120. The equally distributed number of teeth n = 6, as Figure 5 shown.

[0164] Step 1: First, through the rough grinding process, grind the gear to remove material until the remaining unilateral normal allowance is 0.10 mm;

[0165] Step 2: Select the equally distributed grinding method, divide the tooth grooves equally, and round down. In this way, the extra tooth grooves will be in the middle of the first part and the last part;

[0166] num_k = floor(56 / 6) = 9

[0167] odd_k = mod(56 / 6) = 1

[0168] t = floor(9 / 2) = 4

[0169] odd_t = mod(9 / 2) = 1

[0170] 1) For each part, first grind the adjacent 2 tooth grooves, and then perform the grinding of the next part. When the gear rotates one circle, all parts of the gear will have the tooth grooves ground;

[0171] r = 1

[0172] park1_k1 = 0°

[0173] park1_k2 = 0 + 360 / 56 = 6.4286°

[0174] park2_k3 = 0 + 360 / 56*6 = 38.5714°

[0175] park2_k4 = 0 + 360 / 56*(6 + 1) = 45°

[0176] LL

[0177] park(m)_k(2m - 1) = 0 + 360 / 56*6*(m - 1) = 6*(m - 1)*6.4286°

[0178] park(m)_k(2m) = 0 + 360 / 56*(6*(m - 1) + 1) = (6*(m - 1) + 1)*6.4286°

[0179] 2) Next, continue to grind the 2 unground tooth grooves adjacent to the tooth grooves that have been ground in the first part;

[0180] r = 2

[0181] park1_k(12 + 1)=0 - 360 / 56=-6.4286°

[0182] park1_k(12 + 2)=0 + 360 / 56 * 2 = 12.8571°

[0183] park2_k(12 + 3)=0 + 360 / 56 * (6 - 1)=32.1429°

[0184] park2_k(12 + 4)=0 + 360 / 56 * (6 + 2)=51.4286°

[0185] LL

[0186] park(m)_k(2m + 12 - 1)=0 + 360 / 56 * (m - 1)*(6 - 1)=(m - 1)*32.1429°

[0187] park(m)_k(2m + 12)=0 + 360 / 56 * (m - 1)*(6 + 2)=(m - 1)*51.4286°

[0188] 3) Then grind the two unground tooth grooves adjacent to the next part of the ground tooth groove. When the gear rotates one circle, all parts have tooth grooves ground. Grind them in sequence until all the tooth grooves of the gear have been ground, that is, the uniform grinding ends;

[0189] r = t

[0190] park1_k((r - 1)*12 + 1)=0 - 360 / 56*(r - 1)=-(r - 1)*6.4286°

[0191] park1_k((r - 1)*12 + 2)=0 + 360 / 56*(r)=-r*6.4286°

[0192] park2_k((r - 1)*12 + 3)=0 + 360 / 56*(6-(r - 1))=(7 - r)*6.4286°

[0193] park2_k((r - 1)*12 + 4)=0 + 360 / 56*(6 + r)=(6 + r)*6.4286°

[0194] LL

[0195] park(m)_k((r - 1)*(12 + m)-1)=0 + 360 / 56*((m - 1)*6-(r - 1))

[0196] park(m)_k((r - 1)*(12 + m)) = 0 + 360 / 56*((m - 1)*6 + r)

[0197] 4) If odd_t is odd, then perform Step 2-4, carry out the machining for the (t + 1)-th revolution, and odd_t = 1. In Step 2-4, if odd_k is odd, then perform the (n + 1)-th part, where odd_k = 1. That is, the machining is carried out between the first part and the last part. Finally, all the teeth of the gear are machined.

[0198] r = t + 1

[0199] park1_k(r*6 + 1) = 0 + 360 / 56*(t)

[0200] park2_k(r*6 + 2) = 0 + 360 / 56*(6 + r)

[0201] LL

[0202] park(m)_k(r*(m + 6)) = 0 + 360 / 56*((m - 1)*6 + r)

[0203] s = z - num_k*n = 2

[0204] park(9)_k(r*(16) + 1) = 0 + 360 / 56*(6*9 + 1)

[0205] LL

[0206] park(9)_k(r*(16) + s) = 0 + 360 / 56*(6*9 + s)

[0207] Step 4: Based on the uniform grinding, first semi-finish grind one revolution, and successively grind 2 tooth grooves of each part, such as Figure 3 tooth grooves 1 - 12;

[0208] Step 5: Then finish grind one revolution, and continue to grind the 2 tooth grooves that have been semi-finished ground in Step 4, such as Figure 3 tooth grooves 1 - 12;

[0209] Step 6: Then successively carry out the grinding according to Step 4 and Step 5 to grind all the tooth grooves. Successively grind the tooth grooves 13 - 56;

[0210] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the invention, and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for hybrid gear grinding of large-sized gears, characterized in that, It includes the following steps: Step 1: First, through the rough grinding process, grind the gear to remove material until the remaining unilateral normal allowance is 0.05 mm - 0.20 mm; Step 2: Select the uniform grinding method. Divide the tooth spaces equally and round down. In this way, the extra tooth spaces will be in the middle of the first part and the last part; num_k = floor(z / n) odd_k = mod(z / n) r = floor(num_k / 2) odd_t = mod(num_k / 2) In the formula, floor is to round down, num_k is the rounded number of teeth in each part, n is the number of equal parts, generally selected between 4 and 8, r is the number of circles of the gear ring rotating and rounding down, mod is the remainder function. If odd_k = 0, it is an even number; if odd_k = 1, it is an odd number. The same applies to odd_t; Step 3: Based on the uniform grinding, first perform semi-finishing grinding, and grind 2 tooth spaces in each part in turn; Step 4: Then perform finishing grinding, and continue to grind the same 2 tooth spaces that were ground in semi-finishing grinding in Step 3; Step 5: Then, through the uniform grinding process, grind in turn according to Step 3 and Step 4 to grind all the tooth spaces; Step 6: If there is still allowance on the unilateral normal of the tooth surface, the finishing grinding process can be selected to grind off the allowance.

2. The large-scale gear process hybrid gear grinding method according to claim 1, characterized in that: The specific steps of Step 2 include the following steps: Step 2-1: For each part, first grind 2 adjacent tooth spaces, and then grind the next part. When the gear rotates one circle, all parts of the gear have tooth spaces ground; r＝1 park1_k1 = c1 park1_k2 = c1 + 360 / z park2_k3 = c1 + 360 / n park2_k4 = c1 + 360 / n + 360 / z LL park(m)_k(2m - 1) = c1 + 360 / n * (m - 1) park(m)_k(2m) = c1 + 360 / n * (m - 1) + 360 / z In the formula, r = 1 represents the first circle, k1 is the tooth with serial number 1, c1 is the angle of the initial No. 1 tooth, n is the number of equal parts, z is the number of tooth spaces, and m is the mth part. Step 2-2: Next, continue to grind 2 unground tooth spaces adjacent to the tooth spaces that have been ground in the first part; r＝2 park1_k(2m + 1) = c1 - 360 / z park1_k(2m + 2) = c1 + 360 / z * 2 park2_k(2m + 3) = c1 + 360 / n - 360 / z park2_k(2m + 4) = c1 + 360 / n + 360 / z * 2 LL park(m)_k(4m - 1) = c1 + 360 / n * (m - 1) - 360 / z park(m)_k(4m) = c1 + 360 / n * (m - 1) + 360 / z * 2 In the formula, r = 2 represents the second circle, k1 is the tooth with serial number 1, c1 is the angle of the initial No. 1 tooth, n is the number of equal parts, z is the number of tooth spaces, and m is the mth part. Step 2-3: Subsequently, grind the two unground tooth grooves adjacent to the next part of the ground tooth grooves. Rotate the gear one full circle so that all parts have tooth grooves ground. Grind them in sequence until all tooth grooves of the gear have been ground, i.e., the uniform grinding is completed; r＝t park1_k(t*m + 1) = c1 - 360 / z*(t - 1) park1_k(t*m + 2) = c1 + 360 / z*(t) park2_k(t*m + 3) = c1 + 360 / n - 360 / z*(t - 1) park2_k(t*m + 4) = c1 + 360 / n + 360 / z*(t) LL park(m)_k(2*t*m - 1) = c1 + 360 / n*(m - 1) - 360 / z*(t - 1) park(m)_k(2*t*m) = c1 + 360 / n*(m - 1) + 360 / z*(t) In the formula, r = t, representing the t-th circle, k1 is the tooth numbered 1, c1 is the angle of the initial tooth No. 1, n is the number of equal parts, z is the number of tooth grooves, and m is the m-th part. Step 2-4: If odd_t is odd, then perform Step 2-4 for the (t + 1)-th circle processing. In Step 2-4, if odd_k is odd, then perform the (n + 1)-th part, i.e., process in the middle of the first part and the last part. Finally, all teeth of the gear are processed. r＝t+1 if odd_t == 1 park1_k((r - 1)*2n + 1) = c1 + 360 / z*(r) park2_k((r - 1)*2n + 2) = c1 + 360 / z*(num_k + r) LL park(m)_k((r - 1)*(2n + m)) = c1 + 360 / z*((m - 1)*num_k + r) end if odd_k == 1 s = z - num_k*n park(n + 1)_k((r - 1)*(3n) + 1) - c1 + 360 / z*(n*num_k + 1) LL park(n + 1)_k((r - 1)*(3n) + s) = c1 + 360 / z*(n*num_k + s) end In the formula, r = t + 1, representing the (t + 1)-th circle, k1 is the tooth numbered 1, c1 is the angle of the initial tooth No. 1, n is the number of equal parts, z is the number of tooth grooves, m is the m-th part, and s is the remaining teeth after rounding the gear.

3. A method for hybrid gear grinding of large-sized gears according to claim 1, characterized in that: In Step 2, in the uniform grinding method, the tooth grooves of the gear are equally divided, and two tooth grooves of each part are ground in sequence.

4. A method for hybrid gear grinding of large-sized gears according to claim 1, characterized in that: In Step 2, in the uniform grinding method, after the second circle starts, two tooth grooves adjacent to the ground tooth grooves of the previous circle are ground in sequence.

5. A method for hybrid gear grinding of large-sized gears according to claim 1, characterized in that: In Step 4 and Step 5, first perform semi-finishing grinding for one circle so that two tooth grooves are ground for all uniformly distributed parts of the gear, and then select to perform finishing grinding on the ground tooth grooves. Then, through the uniform grinding process, grind all tooth grooves in sequence, i.e., the grinding of the gear mixing process is completed.

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