CN110039256B - Bearing protrusion process optimization method and device - Google Patents

Abstract

The invention relates to the technical field of bearing processing, in particular to a bearing protrusion process optimization method and a bearing protrusion process optimization device. According to the influence coefficient of the bearing parameters on the bearing protrusion amount and the corresponding process index, the comprehensive lifting coefficient is introduced, and the corresponding parameters are corrected according to the magnitude of the comprehensive lifting coefficient. The invention can quickly, economically and effectively realize the accurate processing of the bearings with different precision grades or special requirements, and simultaneously quickly judge whether the given process drawing is suitable for the existing equipment.

Description

Bearing protrusion process optimization method and device

Technical Field

The invention relates to the technical field of bearing processing, in particular to a bearing protrusion process optimization method and a bearing protrusion process optimization device.

Background

The high-precision machining industry has more and more customized and flexible production requirements, and meanwhile, with the development of intelligent manufacturing, precision machining equipment has the capabilities of self-perception, self-detection, self-analysis and self-adjustment, and can accurately calculate the matching between the inherent process machining capacity and the process requirement. At present, the processing of the bearing is carried out according to the design and the process drawing provided by a designer, and the deviation in the processing process is selected by the designer. The flow from design to processing has lagged behind the development requirements and mainly shows the following points: 1. the traditional processing method based on the design process drawing can not give full play to the capability of processing equipment, can not ensure the processing quality and efficiency, and is not economical and practical; 2. a plurality of designers have low understanding degree on processing equipment, and the deviation of the design process is inconsistent with the actual processing capacity, so that the processing error is caused; 3. when a customer has special requirements on certain parameters of a processed product, whether the existing processing equipment can meet the technical requirements of the customer cannot be judged quickly.

The patent with the authorization number of 100380007C discloses a method for processing the protruding amount of a matched angular contact ball bearing, which analyzes the influence of processing errors of various parameters on the protruding amount of the bearing, thereby effectively improving the one-time matching rate of the matched angular contact ball bearing.

Disclosure of Invention

The invention aims to provide a bearing protrusion process optimization method and a bearing protrusion process optimization device, which are used for solving the problems of low production process efficiency and increased cost caused by the conventional method.

In order to achieve the purpose, the invention provides a bearing protrusion process optimization method, which comprises the following steps:

method aspect one, method aspect one includes the steps of:

calculating the influence coefficient of the bearing parameters on the bearing protrusion amount;

determining the process index of the corresponding process of the parameters in the processing process;

calculating to obtain a comprehensive lifting coefficient according to the influence coefficient and the process index;

and adjusting the parameters according to the comprehensive lifting coefficient.

And in a second method scheme, on the basis of the first method scheme, the parameters comprise the diameter of the steel ball, the radial play of the bearing, the inner ring groove, the outer ring groove, the width of the bearing and the curvature radius of the channel.

In the third method scheme, on the basis of the second method scheme, the calculation formula of the bearing protrusion amount is as follows:

wherein, the bearing protrusion amount is the bearing protrusion amount; b is the width of the bearing; a is_iThe position size of the inner ring groove is obtained; a is_eThe position size of the outer ring groove is adopted; g_rIs the bearing radial play; r_iIs the curvature radius of the inner ring channel; r_eThe curvature radius of the outer ring channel is shown; d_wThe diameter of the steel ball is taken as the diameter of the steel ball;

and solving a deviation derivative of a calculation formula of the bearing protrusion amount to obtain a formula:

Δ＝A₁ΔB-A₂Δa_i-A₃Δa_e+A₄ΔG_r-A₅ΔD_w+A₆ΔR_i+A₇ΔR_e

wherein (A)₁，A₂，…，A₇) For the influence coefficient, set A_i＝(A₁，A₂，…，A₇)，i＝1,2，…7。

In a fourth method aspect, on the basis of any one of the first to third method aspects, the process index calculation formula is:

wherein i is the ith parameter, C_PiThe process index corresponding to the ith parameter; t is_UiThe tolerance upper limit corresponding to the ith parameter; t is_LiThe tolerance lower limit corresponding to the ith parameter; s_iThe standard deviation of the sample corresponding to the ith parameter.

In the fifth method, on the basis of the fourth method, the comprehensive lifting coefficient is as follows:

K_i＝A_i*(C_Pi-1)

wherein K_iAnd the comprehensive lifting coefficient corresponding to the ith parameter.

The invention also provides a bearing protrusion process optimization device, which comprises the following steps:

in a first embodiment, the first embodiment comprises a processor and a memory, the processor is configured to execute a program stored in the memory to implement the method of:

calculating the influence coefficient of the bearing parameters on the bearing protrusion amount;

determining the process index of the corresponding process of the parameters in the processing process;

calculating to obtain a comprehensive lifting coefficient according to the influence coefficient and the process index;

and adjusting the parameters according to the comprehensive lifting coefficient.

And in the second device scheme, on the basis of the first device scheme, the parameters comprise the diameter of the steel ball, the radial internal clearance of the bearing, the inner ring groove, the outer ring groove, the width of the bearing and the curvature radius of the channel.

And on the basis of the second device scheme, the calculation formula of the bearing protrusion amount is as follows:

wherein, the bearing protrusion amount is the bearing protrusion amount; b is the width of the bearing; a is_iThe position size of the inner ring groove is obtained; a is_eThe position size of the outer ring groove is adopted; g_rIs the bearing radial play; r_iIs the curvature radius of the inner ring channel; r_eThe curvature radius of the outer ring channel is shown; d_wThe diameter of the steel ball is taken as the diameter of the steel ball;

and solving a deviation derivative of a calculation formula of the bearing protrusion amount to obtain a formula:

Δ＝A₁ΔB-A₂Δa_i-A₃Δa_e+A₄ΔG_r-A₅ΔD_w+A₆ΔR_i+A₇ΔR_e

wherein (A)₁，A₂，…，A₇) For the influence coefficient, set A_i＝(A₁，A₂，…，A₇)，i＝1,2，…7。

In the fourth device scheme, on the basis of any one of the first device scheme to the third device scheme, the process index calculation formula is as follows:

wherein i is the ith parameter, C_PiThe process index corresponding to the ith parameter; t is_UiThe tolerance upper limit corresponding to the ith parameter; t is_LiThe tolerance lower limit corresponding to the ith parameter; s_iThe standard deviation of the sample corresponding to the ith parameter.

And in the fifth device scheme, on the basis of the fourth device scheme, the comprehensive lifting coefficient is as follows:

K_i＝A_i*(C_Pi-1)

wherein K_iAnd the comprehensive lifting coefficient corresponding to the ith parameter.

The invention has the beneficial effects that: according to the influence coefficient of the bearing parameter on the bearing protrusion amount and the corresponding process index, the comprehensive lifting coefficient is introduced, the corresponding parameter is corrected according to the size of the comprehensive lifting coefficient, the accurate processing of the bearing with different precision grades or special requirements can be quickly, economically and effectively realized, and meanwhile, whether the given process drawing is suitable for the existing equipment or not is quickly judged.

Drawings

FIG. 1 is a flow chart of the method of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The invention provides a bearing protrusion process optimization method and a device thereof, which are used for carrying out process optimization based on equipment processing capacity so as to quickly, economically and effectively realize the accurate processing of bearings with different precision grades or special requirements. Firstly, the degree of influence of each parameter deviation on the performance of the bearing is calculated, and then matching optimization is carried out according to the numerical value of the equipment process capability index.

The invention takes an angular contact ball bearing as an example, the technical scheme adopted by the invention is that a flow chart is shown in figure 1, a customer customizes that the protrusion amount is a very small value, and the degree of influence of each parameter on the bearing is firstly calculated according to the type of the bearing. The amount of protrusion of the angular contact ball bearing can be calculated by the following equation:

wherein, the bearing protrusion amount is the bearing protrusion amount; b is the width of the bearing; a is_iThe position size of the inner ring groove is obtained; a is_eThe position size of the outer ring groove is adopted; g_rIs the radial play of the bearing; r_iIs the curvature radius of the inner ring channel; r_eIs an outer ringRadius of curvature of the channel; d_wIs the diameter of the steel ball.

By derivation of the formula (1) and introduction of a coefficient A of influence of each parameter on the protrusion amount_iTo obtain formula (2):

Δ＝A₁ΔB-A₂Δa_i-A₃Δa_e+A₄ΔG_r-A₅ΔD_w+A₆ΔR_i+A₇ΔR_e (2)

wherein (A)₁，A₂，…，A₇) For the influence coefficient, set A_i＝(A₁，A₂，…，A₇) I is the ith parameter, i is 1,2, … 7.

And then calculating the process indexes corresponding to the parameters:

wherein, C_PiThe process index corresponding to the ith parameter; t is_UiThe tolerance upper limit corresponding to the ith parameter; t is_LiThe tolerance lower limit corresponding to the ith parameter; s_iThe standard deviation of the sample corresponding to the ith parameter.

Capacity improvement factor B of introduction process_iLet B_i＝C_Pi1, i.e. the difference between the actual process index of the parameters influencing the protrusion and 1 (rounded off below zero), then K_i＝A_i*B_iThe coefficient is comprehensively improved for the working procedure. In the optimization of parameter deviation in the machining process, the process comprehensive improvement coefficient of the influence weight of the parameter deviation on the protrusion amount and the actual process capacity is considered, and the parameter with the larger process comprehensive improvement coefficient is preferentially adjusted.

Taking angular contact ball bearing 7005C/P4 as an example, substituting the bearing parameters into the above equations (1) and (2), judging whether the protrusion amount meets the requirement according to the calculation result of the equation (1), and obtaining the influence coefficient of each parameter on the bearing protrusion amount according to the equation (2), wherein the equation is as follows:

Δ＝ΔB-Δa_i-Δa_e+1.93ΔG_r-3.76ΔD_w+0.81ΔR_i+0.81ΔR_e (4)

therefore, the influence coefficient A of each parameter on the bearing protrusion amount can be accurately obtained_iThat is, the influence coefficient of the diameter of the steel ball on the bearing protrusion is-3.76, the influence coefficient of the radial play of the bearing on the protrusion is 1.93, and the groove positions a of the inner ring and the outer ring_i、a_eAnd the coefficient of influence of the bearing width B on the protrusion is 1, and the curvature radius R of the channel_i、R_eThe coefficient of influence on the protrusion amount was 0.81.

If the calculated protrusion amount does not meet the requirement, according to the design drawing, C is calculated by using the formula (3)_PiAnd B_iThat is, the process capability improvement coefficient of the steel ball diameter is 0.4, the process capability improvement coefficient of the radial clearance is 0.3, and the positions a of the inner ring groove and the outer ring groove_iAnd a_eThe process capacity improvement coefficients of (1) and (B) are all 0.25, the process capacity improvement coefficient of the bearing width B is 0.5, and the curvature radius R of the channel is_iAnd R_eAll the process capacity improvement coefficients of (2) are 0.1.

Calculating the comprehensive lifting coefficient K_i＝A_i*B_iThe overall lift coefficient of the steel ball diameter is 1.504, the overall lift coefficient of the radial play is 0.579, and the inner and outer ring groove positions a_iAnd a_eThe comprehensive lifting coefficient of (A) is 0.25, the comprehensive lifting coefficient of the bearing width B is 0.5, and the curvature radius R of the channel_iAnd R_eThe overall lift coefficient of (2) is 0.081. Analysis by Synthesis K_iThe value of the comprehensive lifting coefficient of the diameter of the steel ball is larger than that of other comprehensive lifting coefficients, so that the diameter of the steel ball is adjusted firstly, for example, the set value of the diameter of the steel ball is reduced, and then the bearing clearance is adjusted; while other parameters, e.g. radius of curvature R of the channel_iAnd R_eThe comprehensive lifting coefficients are all 0.081, the numerical values are too small, and the influence on the protrusion amount is small, so that the adjustment significance is not large, and the adjustment can be omitted.

And after the parameters are adjusted, the protrusion amount is recalculated, and if the requirement of the protrusion amount cannot be met, the adjustment is continued according to the method until the requirement of the protrusion amount is met. The method can be used for quickly adjusting to meet the requirements of customers, avoids meaningless adjustment, and is economical and practical.

The present invention is not limited to the described embodiments, for example, the formula in the invention is equivalently modified, and the technical solution formed by the above embodiment is formed by fine adjustment, and the technical solution still falls into the protection scope of the present invention.

Claims (2)

1. The method for optimizing the bulging process of the bearing is characterized by comprising the following steps of:

calculating the influence coefficient of the bearing parameters on the bearing protrusion amount;

determining the process index of the corresponding process of the parameters in the processing process;

calculating to obtain a comprehensive lifting coefficient according to the influence coefficient and the process index;

adjusting the parameters according to the comprehensive lifting coefficient;

of the parameters, the first parameter is the width B of the bearing, and the second parameter is the position size a of the inner ring groove_iThe third parameter is the outer ring groove position size a_eThe fourth parameter is the radial clearance G of the bearing_rThe fifth parameter is the curvature radius R of the inner ring channel_iThe sixth parameter is the curvature radius R of the outer ring channel_eThe seventh parameter is the diameter D of the steel ball_w；

The calculation formula of the bearing protrusion amount is as follows:

wherein, the bearing protrusion amount is the bearing protrusion amount;

and solving a deviation derivative of a calculation formula of the bearing protrusion amount to obtain a formula:

Δ＝A₁ΔB-A₂Δa_i-A₃Δa_e+A₄ΔG_r-A₅ΔD_w+A₆ΔR_i+A₇ΔR_e

wherein A is₁，A₂，…，A₇For the influence coefficient, set A_i＝(A₁，A₂，…，A₇)，i＝1,2，…7；

The process index calculation formula is as follows:

wherein i is the number of the parameter, C_PiThe process index corresponding to the ith parameter; t is_UiThe tolerance upper limit corresponding to the ith parameter; t is_LiThe tolerance lower limit corresponding to the ith parameter; s_iThe standard deviation of a sample corresponding to the ith parameter;

the comprehensive lifting coefficient is as follows:

K_i＝A_i*(C_Pi-1)

wherein K_iThe comprehensive lifting coefficient corresponding to the ith parameter;

the method for adjusting the parameters according to the comprehensive lifting coefficient is to preferentially adjust the parameters with larger comprehensive lifting coefficients in the working procedure.

2. The utility model provides a protrusion amount technology optimization device of bearing which characterized in that: comprising a processor and a memory, the processor being configured to execute a program stored in the memory to implement the method of:

calculating the influence coefficient of the bearing parameters on the bearing protrusion amount;

determining the process index of the corresponding process of the parameters in the processing process;

calculating to obtain a comprehensive lifting coefficient according to the influence coefficient and the process index;

adjusting the parameters according to the comprehensive lifting coefficient;

of the parameters, the first parameter is the width B of the bearing, and the second parameter is the position size a of the inner ring groove_iThe third parameter is the outer ring groove position size a_eThe fourth parameter is the radial clearance G of the bearing_rThe fifth parameter is the curvature radius R of the inner ring channel_iThe sixth parameter is the curvature radius R of the outer ring channel_eThe seventh parameter is the diameter D of the steel ball_w；

The calculation formula of the bearing protrusion amount is as follows:

wherein, the bearing protrusion amount is the bearing protrusion amount;

and solving a deviation derivative of a calculation formula of the bearing protrusion amount to obtain a formula:

Δ＝A₁ΔB-A₂Δa_i-A₃Δa_e+A₄ΔG_r-A₅ΔD_w+A₆ΔR_i+A₇ΔR_e

wherein A is₁，A₂，…，A₇For the influence coefficient, set A_i＝(A₁，A₂，…，A₇)，i＝1,2，…7；

The process index calculation formula is as follows:

wherein i is the number of the parameter, C_PiThe process index corresponding to the ith parameter; t is_UiThe tolerance upper limit corresponding to the ith parameter; t is_LiThe tolerance lower limit corresponding to the ith parameter; s_iThe standard deviation of a sample corresponding to the ith parameter;

the comprehensive lifting coefficient is as follows:

K_i＝A_i*(C_Pi-1)

wherein K_iThe comprehensive lifting coefficient corresponding to the ith parameter;

the method for adjusting the parameters according to the comprehensive lifting coefficient is to preferentially adjust the parameters with larger comprehensive lifting coefficients in the working procedure.

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