A double-row tapered roller bearing outer ring shaping process

Abstract

The present application relates to the technical field of bearing ring shaping, in particular to a double-row tapered roller bearing outer ring shaping process. The outer diameter of the double-row tapered roller bearing outer ring near the A end face is measured, and the A end face outer diameter deformation high point and the A end face outer diameter deformation low point are marked to obtain the diameter variation; the outer diameter of the double-row tapered roller bearing outer ring near the B end face is measured, and the B end face outer diameter deformation high point and the B end face outer diameter deformation low point are marked to obtain the diameter variation; the position of the top die is determined, the top die tool is started, and the outer diameter deformation low point becomes the outer diameter deformation high point through the force of the tool; the shaping is finished, and heating and heat preservation are carried out through the annealing furnace. According to the diameter variation of the two side end faces of the double-row tapered roller bearing outer ring, a reasonable top die formula is determined, the shaping position and the top die degree are strictly controlled, and a large reverse deformation amount is adopted to ensure that the diameter variation after shaping is within the allowable range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing ring shaping, in particular to a double-row tapered roller bearing outer ring shaping process. BACKGROUND

[0002] For a long time, there is no uniform shaping method for the heat treatment deformation of the outer ring of the double-row tapered roller bearing, and the shaping effect is uneven. SUMMARY

[0003] In view of the defects of the prior art, the present application provides a double-row tapered roller bearing outer ring shaping process, which strictly controls the shaping position and the degree of the top type according to the diameter variation of the two side end faces of the double-row tapered roller bearing outer ring, and uses a large reverse shaping amount to ensure that the diameter variation after shaping is within the allowable range.

[0004] In order to achieve the above purpose, the technical scheme provided by the present application is a double-row tapered roller bearing outer ring shaping process, the double-row tapered roller bearing outer ring has an A end face and a B end face, and the specific steps include

[0005] S100, measuring the outer diameter of the double-row tapered roller bearing outer ring close to the A end face, and marking the A end face outer diameter deformation high point and the A end face outer diameter deformation low point, to obtain the diameter variation S A ;

[0006] S200, measuring the outer diameter of the double-row tapered roller bearing outer ring close to the B end face, and marking the B end face outer diameter deformation high point and the B end face outer diameter deformation low point, to obtain the diameter variation S B ;

[0007] S300,

[0008] If one of the diameter variation S A and the diameter variation S B is greater than the standard deformation threshold value, the angle between the A end face outer diameter deformation high point and the A end face outer diameter deformation low point is less than 90°, the A end face outer diameter deformation high point corresponds to the B end face outer diameter deformation high point, the A end face outer diameter deformation low point corresponds to the B end face outer diameter deformation low point, and the difference between the diameter variation S A and the diameter variation S B is greater than 1mm, start S300;

[0009] If the diameter variation S A and the diameter variation S B are both greater than the standard deformation threshold value, the angle between the A end face outer diameter deformation high point and the A end face outer diameter deformation low point is less than 90°, the A end face outer diameter deformation high point does not correspond to the B end face outer diameter deformation high point, the A end face outer diameter deformation low point does not correspond to the B end face outer diameter deformation low point, and the difference between the diameter variation S A and the diameter variation SB When the difference between the two is greater than 1mm, start S400;

[0010] S300, for the side of the diameter variation greater than the standard deformation threshold, offset 10-30 degrees from the outer diameter deformation low point to the side away from the deformation high point, start the top die, make the outer diameter deformation low point become the outer diameter deformation high point through the force of the die, and for the side of the diameter variation less than the standard deformation threshold, start another top die, the two top dies are vertically arranged; the shaping is finished, and heating and heat preservation are performed through the annealing furnace;

[0011] S400, compare the diameter variation S A and the diameter variation S B , at the end of the larger diameter variation, offset 10-20 degrees from the outer diameter deformation low point to the side away from the deformation high point, start the top die, make the outer diameter deformation low point become the outer diameter deformation high point through the force of the die, and at the end of the smaller diameter variation, offset 10-20 degrees from the outer diameter deformation low point to the side away from the deformation high point, start the top die, make the outer diameter deformation low point become the outer diameter deformation high point through the force of the die;

[0012] The shaping is finished, and heating and heat preservation are performed through the annealing furnace.

[0013] Further, when the double-row tapered roller bearing outer ring is martensitic high-carbon chromium bearing steel, in step S300, when the diameter variation Y after the top die meets:

[0014] Y=(1.0-2.0)X+(0.0-0.5mm)

[0015] , the top die is finished, wherein X is the diameter variation before the top die.

[0016] Further, when the double-row tapered roller bearing outer ring is bainitic high-carbon chromium bearing steel, in step S300, when the diameter variation Y after the top die meets:

[0017] Y=(0.5-2.0)X+(0.0-0.5mm)

[0018] , the top die is finished, wherein X is the diameter variation before the top die.

[0019] Further, when the double-row tapered roller bearing outer ring is martensitic high-carbon chromium bearing steel, in step S400, when the diameter variation at the larger end is top die, when the diameter variation Y after the top die meets:

[0020] Y=(1.0-2.0)X+(0.0-0.5mm)

[0021] , the top die is finished, wherein X is the diameter variation before the top die.

[0022] When the diameter variation Y after the sizing meets:

[0023] Y = (0.5~1.5) X + (0.0~0.5mm)

[0024] when the sizing is performed at the end with a smaller diameter variation in step S400, where X is the diameter variation before the sizing.

[0025] Further, when the double-row tapered roller bearing outer ring is a bainite high-carbon chromium bearing steel, when the sizing is performed at the end with a larger diameter variation in step S400, when the diameter variation Y after the sizing meets:

[0026] Y = (0.5~2.0) X + (0.0~0.5mm)

[0027] where X is the diameter variation before the sizing;

[0028] When the diameter variation Y after the sizing meets:

[0029] Y = (0.5~1.5) X + (0.0~0.5mm)

[0030] when the sizing is performed at the end with a smaller diameter variation in step S400, where X is the diameter variation before the sizing.

[0031] Further, measuring the diameter variation of the outer diameter of the double-row tapered roller bearing outer ring comprises: rotating a measuring pipe gauge along the circumferential direction of the double-row tapered roller bearing outer ring, determining the low point and the high point of the sleeve ring through the number of rotations of the pointer of the dial gauge, and determining the diameter variation.

[0032] Further, when measuring the outer diameter of the double-row tapered roller bearing outer ring, the measuring position is 10mm~15mm away from the end face.

[0033] Further, the measuring pipe gauge comprises a pipe gauge body, an abutting component slidably fixed to the pipe gauge body, and a measuring table component slidably fixed to the pipe gauge body.

[0034] Further, when the double-row tapered roller bearing outer ring is a martensite high-carbon chromium bearing steel, the sizing and tempering temperature of the tempering furnace in step S300 is 180°C~200°C, and the sizing and tempering time is 10h~15h;

[0035] When the double-row tapered roller bearing outer ring is a bainite high-carbon chromium bearing steel, the sizing and tempering temperature of the tempering furnace in step S300 is 250°C~270°C, and the sizing and tempering time is 10h~15h.

[0036] Further, when the double row tapered roller bearing outer ring is a martensitic high carbon chromium bearing steel, the shaping tempering temperature of the heating and holding in the tempering furnace in step S400 is 180°C-200°C, and the shaping tempering time is 10h-15h;

[0037] When the double row tapered roller bearing outer ring is a bainitic high carbon chromium bearing steel, the shaping tempering temperature of the heating and holding in the tempering furnace in step S400 is 250°C-270°C, and the shaping tempering time is 10h-15h.

[0038] The present application has the following beneficial effects: according to the diameter variation amount and the high point and low point positions of the two side end faces of the double row tapered roller bearing outer ring, the shaping position and the degree of the top type are strictly controlled, and a large reverse shaping amount is adopted to ensure that the diameter variation amount after shaping is within the allowable range. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 FIG. 1 is a structural schematic diagram of the outer diameter deformation high point and the outer diameter deformation low point of the double row tapered roller bearing outer ring in an embodiment of the present application;

[0040] Figure 2 FIG. 2 is a structural schematic diagram of the outer diameter deformation high point and the outer diameter deformation low point of the double row tapered roller bearing outer ring in another embodiment of the present application;

[0041] Figure 3 FIG. 3 is a structural schematic diagram of the double row tapered roller bearing outer ring during measurement in an embodiment of the present application;

[0042] Figure 4 FIG. 4 is a structural schematic diagram of the double row tapered roller bearing outer ring during installation of the top type tooling in an embodiment of the present application;

[0043] Figure 5 FIG. 5 is a ring outer diameter allowable variation amount table in an embodiment of the present application;

[0044] Figure 6 FIG. 6 is a parameter table of embodiment 1-embodiment 4 of the present application;

[0045] In the figure: a1, A end face outer diameter deformation high point, a2, A end face outer diameter deformation low, b1, B end face outer diameter deformation high point, b2, B end face outer diameter deformation low point,

[0046] 10, top type tooling, 20, measuring pipe ruler, 21, pipe ruler body, 22, abutting component, 23, measuring table component. DETAILED DESCRIPTION

[0047] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0048] Referring to Figures 1-4 A double-row tapered roller bearing outer ring shaping process can be applied to martensitic high-carbon chromium bearing steel and bainitic high-carbon chromium bearing steel. The double-row tapered roller bearing outer ring has an A end face and a B end face. The specific steps of the shaping process include:

[0049] Step S100, measure the outer diameter of the double-row tapered roller bearing outer ring near the A end face, and mark the A end face outer diameter deformation high point a1 and the A end face outer diameter deformation low point a2, to obtain the diameter variation S A ;

[0050] Measure the outer diameter of the double-row tapered roller bearing outer ring near the B end face, and mark the B end face outer diameter deformation high point b1 and the B end face outer diameter deformation low point b2, to obtain the diameter variation S B .

[0051] In an embodiment, the diameter variation of the outer diameter of the double-row tapered roller bearing outer ring measured in step S100 includes: using a measuring pipe gauge 20 to rotate in the circumferential direction of the double-row tapered roller bearing outer ring, determining the low point and the high point of the sleeve by the number of revolutions of the pointer of the dial indicator, and determining the diameter variation. The measuring pipe gauge 20 is used to detect the outer diameter near the two end faces respectively.

[0052] In an embodiment, the measuring pipe gauge 20 includes a pipe gauge body 21, an abutting assembly 22 slidably fixed to the pipe gauge body 21, and a measuring table assembly 23 slidably fixed to the pipe gauge body 21.

[0053] Referring to Figure 1 and Figure 4 Step S200, one of the diameter variation S A and the diameter variation S B is greater than the standard deformation threshold value, the angle between the A end face outer diameter deformation high point and the A end face outer diameter deformation low point is less than 90° (m in Figure 1 is less than 90°), the A end face outer diameter deformation high point corresponds to the B end face outer diameter deformation high point, the A end face outer diameter deformation low point corresponds to the B end face outer diameter deformation low point, and the difference between the diameter variation S A and the diameter variation S B is greater than 1 mm, step S300 is started.

[0054] See also Figure 2 , such as diameter variation S A and diameter variation S B are greater than the standard deformation threshold, and the angle between the high point of the outer diameter deformation of the A end face and the low point of the outer diameter deformation of the A end face is less than 90° ( Figure 2 The m in the figure is less than 90°), the high point of the outer diameter deformation of the end face A does not correspond to the high point of the outer diameter deformation of the end face B, the low point of the outer diameter deformation of the end face A does not correspond to the low point of the outer diameter deformation of the end face B, and the diameter change S A and diameter variation S B When the difference between them is greater than 1 mm, step S400 is started.

[0055] The correspondence between the high and low points of the outer diameter deformation of the two end faces means that the high point a1 of the outer diameter deformation of end face A corresponds to the high point b1 of the outer diameter deformation of end face B, and the low point a2 of the outer diameter deformation of end face A corresponds to the low point b2 of the outer diameter deformation of end face B. Whether they correspond is determined by determining whether the axial projection of the high point a1 of the outer diameter deformation of end face A on the plane where end face B is located coincides with the high point b1 of the outer diameter deformation of end face B. Similarly, whether the axial projection of the low point a2 of the outer diameter deformation of end face A on the plane where end face B is located coincides with the low point b2 of the outer diameter deformation of end face B. If they coincide, they correspond; if they do not coincide, they do not correspond.

[0056] It should be noted that the standard deformation threshold is determined according to the national standard JB / T1255-2014 version, or can be specified based on the national standard. In this embodiment, the standard deformation threshold can be Figure 5 The table in is read out.

[0057] See also Figure 1 and Figure 4 Step S300: For the side where the diameter variation is greater than the standard deformation threshold, the outer diameter deformation low point is shifted 10 to 30 degrees away from the deformation high point ( Figure 1 n), start the top tooling 10, installed in Figure 1 At L1 in the figure, the axis of the top tool coincides with L1. The top tool 10 is subjected to force to make the outer diameter deformation low point become the outer diameter deformation high point. For the other top tool on the side where the diameter change is less than the standard deformation threshold, it is installed Figure 1 At L2 in the figure, the axis of the top tooling coincides with L2, and the two top tooling spaces are arranged vertically; after the shaping is completed, it is heated and kept warm in the tempering furnace.

[0058] See also Figure 2 Step S400: compare the diameter variation S A and diameter variation S B , at the end with the larger diameter change, the outer diameter deformation low point is offset 10 to 20 degrees away from the deformation high point (Figure 2 The upper top die is installed at L1 in the middle of the outer ring, i.e., the axis of the top die coincides with L1, and the outer diameter deformation low point becomes the outer diameter deformation high point through the force of the die. Figure 2 The upper top die is installed at L1 in the middle of the outer ring, i.e., the axis of the top die coincides with L1, and the outer diameter deformation low point becomes the outer diameter deformation high point through the force of the die. Figure 2 The upper top die is installed at L1 in the middle of the outer ring, i.e., the axis of the top die coincides with L1, and the outer diameter deformation low point becomes the outer diameter deformation high point through the force of the die.

[0059] The shaping is completed, and heating and heat preservation are performed through a tempering furnace.

[0060] The double-row tapered roller bearing outer ring shaping process strictly controls the shaping position and the degree of top die according to the diameter variation of the two sides of the double-row tapered roller bearing outer ring and the corresponding relationship between the high point and the low point, avoids redundant measurement steps, and uses a large reverse shaping amount to ensure that the diameter variation after shaping is within the allowable range.

[0061] Further, when the double-row tapered roller bearing outer ring is a martensitic high-carbon chromium bearing steel, the diameter variation Y after top die in step S300 satisfies:

[0062] Y=(0.5~2.0)X+(0.0~0.5mm)

[0063] to end the top die, wherein X is the diameter variation before top die.

[0064] Further, when the double-row tapered roller bearing outer ring is a martensitic high-carbon chromium bearing steel, the diameter variation Y after top die in step S300 satisfies:

[0065] Y=(0.5~2.0)X+(0.0~0.5mm)

[0066] to end the top die, wherein X is the diameter variation before top die.

[0067] Further, when the double-row tapered roller bearing outer ring is a martensitic high-carbon chromium bearing steel, the diameter variation Y after top die in step S400 satisfies:

[0068] Y=(0.5~2.0)X+(0.0~0.5mm)

[0069] to end the top die, wherein X is the diameter variation before top die;

[0070] The diameter variation Y after top die in step S400 satisfies:

[0071] Y=(0.5~1.5)X+(0.0~0.5mm)

[0072] Y=(0.5~1.5)X+(0.0~0.5mm)

[0073] In an embodiment, when the double-row tapered roller bearing outer ring is a bainite high-carbon chromium bearing steel, the step S400 is ended when the diameter variation Y after the sizing meets:

[0074] Y=(0.5~1.5)X+(0.0~0.5mm)

[0075] Y=(0.5~1.5)X+(0.0~0.5mm)

[0076] In an embodiment, when the diameter variation Y after the sizing meets:

[0077] Y=(0.5~1.5)X+(0.0~0.5mm)

[0078] Y=(0.5~1.5)X+(0.0~0.5mm)

[0079] The sizing process of the double-row tapered roller bearing outer ring determines the sizing formula corresponding to the martensite high-carbon chromium bearing steel and the bainite high-carbon chromium bearing steel according to the type of the organizational structure, and the allowed range of the diameter variation Y after the sizing can be calculated according to the sizing formula, so that the double-row tapered roller bearing outer rings of different types can be sized more specifically, and the sizing effect can be further optimized.

[0080] In an embodiment, when measuring the outer diameter of the double-row tapered roller bearing outer ring, the measuring position is 10mm~15mm away from the end face.

[0081] Referring to Figure 1 and Figure 4 Taking the embodiment of vertical upward sizing as an example, specifically, the sizing tool 10 is a screw support, when the sizing operation is performed, the sizing tool 10 is installed on the determined position L1 or L2 of the sizing tool 10, that is, the axis of the sizing tool 10 coincides with the position L1 or L2 of the sizing tool, the nut on the screw support is adjusted to start the sizing, after the sizing is completed, the screw support is not disassembled, the deformed amount Y after the sizing is measured again by using the measuring tube ruler 20, if the deformed amount Y after the sizing does not meet the sizing formula, the nut is continuously adjusted to perform the sizing, until the deformed amount Y meets the sizing formula. Specifically, the range of the diameter variation Y after the sizing can be calculated according to the sizing formula, when the diameter variation Y measured after the sizing falls within the range, it is considered that the outer diameter deformation low point becomes the outer diameter deformation high point by the force of the tool. Figure 2 The same applies to the embodiment of parallel upward sizing.

[0082] Preferably, in an embodiment, when the double row tapered roller bearing outer ring is made of martensitic high carbon chromium bearing steel, the temperature of the shaping tempering in the tempering furnace in step S300 is 180°C-200°C, and the shaping tempering time is 10h-15h.

[0083] When the double row tapered roller bearing outer ring is made of bainitic high carbon chromium bearing steel, the temperature of the shaping tempering in the tempering furnace in step S300 is 250°C-270°C, and the shaping tempering time is 10h-15h.

[0084] Preferably, in an embodiment, when the double row tapered roller bearing outer ring is made of martensitic high carbon chromium bearing steel, the temperature of the shaping tempering in the tempering furnace in step S400 is 180°C-200°C, and the shaping tempering time is 10h-15h.

[0085] When the double row tapered roller bearing outer ring is made of bainitic high carbon chromium bearing steel, the temperature of the shaping tempering in the tempering furnace in step S400 is 250°C-270°C, and the shaping tempering time is 10h-15h.

[0086] It should be noted that when measuring, the measurement can be made at a distance of 15 mm from the A end face, and similarly, the measurement can be made at a distance of 15 mm from the B end face.

[0087] Referring to Figure 6 In embodiment 1, a double row tapered roller bearing outer ring shaping process, the double row tapered roller bearing outer ring has an A end face and a B end face, and is made of bainitic high carbon chromium bearing steel, the standard deformation threshold value determined according to the type and size is 1.16 mm, and the specific steps of the shaping process include:

[0088] Step S100, measure the outer diameter of the double row tapered roller bearing outer ring close to the A end face, and mark the A end face outer diameter deformation high point a1 and the A end face outer diameter deformation low point a2, to obtain a diameter variation of 2.6 mm;

[0089] Measure the outer diameter of the double row tapered roller bearing outer ring close to the B end face, and mark the B end face outer diameter deformation high point b1 and the B end face outer diameter deformation low point b2, to obtain a diameter variation of 1.1 mm.

[0090] Step S200, the diameter variation of the A end face is greater than the standard deformation threshold value, and the diameter variation of the B end face is less than the standard deformation threshold value, and the angle between the A end face outer diameter deformation high point and the A end face outer diameter deformation low point is less than 90°. Figure 1m in FIG. 6 is less than 90°), the A-end-face outer diameter deformation high point corresponds to the B-end-face outer diameter deformation high point, the A-end-face outer diameter deformation low point corresponds to the B-end-face outer diameter deformation low point, and the deformation difference between the two end faces is greater than 1 mm, and step S300 is started.

[0091] In step S300, for the A-end face, the outer diameter deformation low point is offset by 10-30 degrees away from the deformation high point (n in FIG. 6), and the upper die tool 10 is installed at L1 in FIG. 6, that is, the axis of the upper die tool coincides with L1, and the outer diameter deformation low point is changed into the outer diameter deformation high point by the force of the upper die tool 10. Figure 1 Figure 1 In step S300, for the A-end face, the outer diameter deformation low point is offset by 10-30 degrees away from the deformation high point (n in FIG. 6), and the upper die tool 10 is installed at L1 in FIG. 6, that is, the axis of the upper die tool coincides with L1, and the outer diameter deformation low point is changed into the outer diameter deformation high point by the force of the upper die tool 10. Figure 1

[0092] The diameter variation Y after the upper die in step S300 is 3.9 mm:

[0093] X = 2.6 mm, Y = 1.5 * 2.6 mm + 0.0 = 3.9 mm.

[0094] The deformation after the shaping and tempering is measured, the A-end-face deformation is 0.8 mm, and the B-end-face deformation is 0.6 mm, both of which are less than the standard deformation threshold of 1.16 mm, meeting the shaping requirements.

[0095] Referring to FIG. 6, Figure 6 In example 2, a double-row tapered roller bearing outer ring shaping process, the double-row tapered roller bearing outer ring has an A-end face and a B-end face, and is made of martensitic high-carbon chromium bearing steel, the standard deformation threshold determined according to the type and size is 1.6 mm, and the specific steps of the shaping process include:

[0096] In step S100, the outer diameter of the double-row tapered roller bearing outer ring close to the A-end face is measured, and the A-end-face outer diameter deformation high point a1 and the A-end-face outer diameter deformation low point a2 are marked, and the diameter variation is 2.9 mm.

[0097] The outer diameter of the double-row tapered roller bearing outer ring close to the B-end face is measured, and the B-end-face outer diameter deformation high point b1 and the B-end-face outer diameter deformation low point b2 are marked, and the diameter variation is 1.3 mm.

[0098] In step S200, the diameter variation of the A-end face is greater than the standard deformation threshold, and the diameter variation of the B-end face is greater than the standard deformation threshold, and the angle between the A-end-face outer diameter deformation high point and the A-end-face outer diameter deformation low point is less than 90° (n in FIG. 6), and step S300 is started. Figure 1 ​​m in the figure is less than 90°), the A end face outer diameter deformation high point corresponds to the B end face outer diameter deformation high point, the A end face outer diameter deformation low point corresponds to the B end face outer diameter deformation low point, and the deformation difference between the two end faces is greater than 1 mm, and step S300 is started.

[0099] Step S300, for the A end face, offset 10 degrees to 30 degrees from the outer diameter deformation low point to the side away from the deformation high point Figure 1 n shown in the figure), start the upper die tool 10, installed at Figure 1 L1 in the figure, that is, the axis of the upper die tool coincides with L1, and the outer diameter deformation low point becomes the outer diameter deformation high point through the force of the upper die tool 10, and for the B end face, another upper die tool is installed at Figure 1 L2 in the figure, that is, the axis of the upper die tool coincides with L2, and the two upper die tools are vertically arranged in space; the shaping is completed, and heating and heat preservation are carried out through a tempering furnace, the shaping and tempering temperature is 200 degrees, and the time is 10 hours.

[0100] The diameter variation Y after the upper die in step S300 is 5.7 mm:

[0101] X = 2.9 mm, Y = shaping ratio 1.97 * 2.9 mm + 0.0 = 5.7 mm.

[0102] The deformation after shaping and tempering is measured, the A end face deformation is 1.2 mm, and the B end face deformation is 0.8 mm, all of which are less than the standard deformation threshold of 1.6 mm, meeting the shaping requirements.

[0103] Referring to Figure 6 In embodiment 3, a double-row tapered roller bearing outer ring shaping process, the double-row tapered roller bearing outer ring has an A end face and a B end face, and is a high-carbon chromium bearing steel of bainite structure, the standard deformation threshold determined according to the type and size is 1.16 mm, and the specific steps of the shaping process include:

[0104] Step S100, measure the outer diameter of the double-row tapered roller bearing outer ring close to the A end face, and mark the A end face outer diameter deformation high point a1 and the A end face outer diameter deformation low point a2, to obtain a diameter variation of 2.9 mm;

[0105] Measure the outer diameter of the double-row tapered roller bearing outer ring close to the B end face, and mark the B end face outer diameter deformation high point b1 and the B end face outer diameter deformation low point b2, to obtain a diameter variation of 1.8 mm.

[0106] Step S200, the diameter variation of both end faces is greater than the standard deformation threshold 1.16 mm, the angle between the outer diameter deformation high point of the A end face and the outer diameter deformation low point of the A end face is less than 90°, the outer diameter deformation high point of the A end face does not correspond to the outer diameter deformation high point of the B end face, the outer diameter deformation low point of the A end face does not correspond to the outer diameter deformation low point of the B end face, and the difference between the diameter variation S A and the diameter variation S B is greater than 1 mm, starting S400;

[0107] Step S400, on the side close to the A end face, offseting 10-20 degrees from the outer diameter deformation low point to the side away from the deformation high point (n shown in Figure 2 ), starting the upper top die tooling, installed at L1 in Figure 2 , that is, the axis of the top die tooling coincides with L1, and the outer diameter deformation low point becomes the outer diameter deformation high point through the force of the tooling, on the side close to the B end face, offseting 10-20 degrees from the outer diameter deformation low point to the side away from the deformation high point, starting the upper top die tooling, installed at L2 in Figure 2 , that is, the axis of the top die tooling coincides with L2, and the outer diameter deformation low point becomes the outer diameter deformation high point through the force of the tooling;

[0108] The shaping is completed, and heating and heat preservation are performed through a tempering furnace, the shaping and tempering temperature is 270 degrees, and the time is 10 hours.

[0109] In step S400, the diameter variation of both end faces is greater than the standard deformation threshold 1.16 mm, the diameter variation Y after the top die is 4.4 mm:

[0110] X =2.9mm, Y = shaping ratio 1.52 *2. 9 mm +0.0=4.4mm.

[0111] When the top die is performed on the end with smaller diameter variation, the diameter variation Y after the top die is 2.5 mm:

[0112] X =1.8mm, Y = shaping ratio 1.39 *1.8mm +0.0=2.5mm

[0113] The deformation after shaping and tempering is measured, the A end face deformation is 0.9 mm, and the B end face deformation is 0.6 mm, all of which are less than the standard deformation threshold 1.16 mm, meeting the shaping requirements.

[0114] Referring to Figure 6 , in embodiment 4, a double-row tapered roller bearing outer ring shaping process, the double-row tapered roller bearing outer ring has an A end face and a B end face, and is made of martensitic high-carbon chromium bearing steel, the determined standard deformation threshold is 1.6 mm, and the specific steps of the shaping process include:

[0115] Step S100, measure the outer diameter of the double-row tapered roller bearing outer ring close to the A end face, and mark the A end face outer diameter deformation high point a1 and the A end face outer diameter deformation low point a2, and obtain the diameter variation of 3.5mm;

[0116] Measure the outer diameter of the double-row tapered roller bearing outer ring close to the B end face, and mark the B end face outer diameter deformation high point b1 and the B end face outer diameter deformation low point b2, and obtain the diameter variation of 2.4mm.

[0117] Step S200, the diameter variation of both end faces is greater than the standard deformation threshold value of 1.6mm, the angle between the A end face outer diameter deformation high point and the A end face outer diameter deformation low point is less than 90°, the A end face outer diameter deformation high point does not correspond to the B end face outer diameter deformation high point, the A end face outer diameter deformation low point does not correspond to the B end face outer diameter deformation low point, and the difference between the diameter variation S A and the diameter variation S B is greater than 1mm, start S400;

[0118] Step S400, on the side close to the A end face, offset 10-20 degrees (n shown in Figure 2 ) from the outer diameter deformation low point to the side away from the deformation high point, start the upper top die tooling, and install it at L1 in Figure 2 , that is, the axis of the top die tooling coincides with L1, and through the force of the tooling, the outer diameter deformation low point becomes the outer diameter deformation high point, on the side close to the B end face, offset 10-20 degrees from the outer diameter deformation low point to the side away from the deformation high point, start the upper top die tooling, and install it at L2 in Figure 2 , that is, the axis of the top die tooling coincides with L2, and through the force of the tooling, the outer diameter deformation low point becomes the outer diameter deformation high point.

[0119] After shaping, heat and hold in a tempering furnace, the shaping and tempering temperature is 200 degrees, and the time is 10h.

[0120] In step S400, on the end with larger diameter variation, the diameter variation Y after top shaping is 6.5mm:

[0121] X=3.5mm, Y=shaping ratio 1.86*6.5mm+0.0=6.5mm.

[0122] When top shaping is performed on the end with smaller diameter variation, the diameter variation Y after top shaping is 3.12mm:

[0123] X=2.4mm, Y=shaping ratio 1.3*2.4mm+0.0=3.12mm

[0124] The deformation after the shaping and tempering is measured, the deformation of the A end face is 1.1 mm, and the deformation of the B end face is 0.8 mm, both of which are less than the standard deformation threshold of 1.6 mm, meeting the shaping requirements.

[0125] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0126] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0127] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0128] In the present application, unless otherwise explicitly specified and limited, a first feature is "on", "over", or "above" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact with an intermediate medium. Moreover, the first feature "over", "above", and "on" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature "under", "below", and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature. It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

Claims

1. A double-row tapered roller bearing outer ring shaping process, wherein the double-row tapered roller bearing outer ring has an A end face and a B end face, characterized in that: The specific steps include S100, measure the outer diameter of the double row tapered roller bearing outer ring near the A end face, and mark the high point of the A end face outer diameter deformation and the low point of the A end face outer diameter deformation to obtain the diameter variation S A ; Measure the outer diameter of the double-row tapered roller bearing outer ring near the B end face, and mark the high point and low point of the outer diameter deformation of the B end face to obtain the diameter variation S B ; S200、 Such as diameter change S A and diameter variation S B One of them is greater than the standard deformation threshold, the angle between the high point of outer diameter deformation of end face A and the low point of outer diameter deformation of end face A is less than 90°, the high point of outer diameter deformation of end face A corresponds to the high point of outer diameter deformation of end face B, the low point of outer diameter deformation of end face A corresponds to the low point of outer diameter deformation of end face B, and the diameter change S A and diameter variation S B When the difference between them is greater than 1 mm, S300 is started; Such as diameter change S A and diameter variation S B The values ​​are all greater than the standard deformation threshold, the angle between the high point of outer diameter deformation of end face A and the low point of outer diameter deformation of end face A is less than 90°, the high point of outer diameter deformation of end face A does not correspond to the high point of outer diameter deformation of end face B, the low point of outer diameter deformation of end face A does not correspond to the low point of outer diameter deformation of end face B, and the diameter variation S A and diameter variation S B When the difference between them is greater than 1 mm, S400 is started; S300: For the side where the diameter variation is greater than the standard deformation threshold, a top-forming tool is installed by shifting 10 to 30 degrees from the low point of the outer diameter deformation to the side away from the high point of the deformation. The tool is subjected to force to turn the low point of the outer diameter deformation into the high point of the outer diameter deformation. For the side where the diameter variation is less than the standard deformation threshold, another top-forming tool is installed. The two top-forming tool spaces are arranged vertically. After shaping, it is heated and kept warm in a tempering furnace; S400, compare diameter variation S A and diameter variation S B , At the end with larger diameter variation, offset 10 to 20 degrees from the low point of outer diameter deformation to the side away from the high point of deformation, start to install the ejection tooling, and make the low point of outer diameter deformation become the high point of outer diameter deformation through the force of the tooling. At the end with smaller diameter variation, offset 10 to 20 degrees from the low point of outer diameter deformation to the side away from the high point of deformation, start to install the ejection tooling, and make the low point of outer diameter deformation become the high point of outer diameter deformation through the force of the tooling. After shaping, it is heated and kept warm in a tempering furnace.

2. The outer ring shaping process of a double-row tapered roller bearing according to claim 1, characterized in that: When the outer ring of the double-row tapered roller bearing is made of martensitic high-carbon chromium bearing steel, the diameter change Y after top forming in step S300 satisfies: Y=(1.0~2.0)X +(0.0~0.5mm) The top forming is ended when X is the diameter change before the top forming.

3. The outer ring shaping process of a double-row tapered roller bearing according to claim 1, characterized in that: When the outer ring of the double-row tapered roller bearing is made of bainite high-carbon chromium bearing steel, the diameter change Y after top forming in step S300 satisfies: Y=(0.5~2.0)X +(0.0~0.5mm) The top forming is ended when X is the diameter change before the top forming.

4. The outer ring shaping process of a double-row tapered roller bearing according to claim 1, characterized in that: When the outer ring of the double-row tapered roller bearing is made of martensitic high-carbon chromium bearing steel, when forming is performed at the end with the larger diameter variation in step S400, the diameter variation Y after forming satisfies: Y=(1.0~2.0)X +(0.0~0.5mm) The top is finished when X is the diameter change before the top; When the end with the smaller diameter variation is subjected to the ejection molding in step S400, the diameter variation Y after ejection molding satisfies: Y=(1.0~1.5)X +(0.0~0.5mm) The top forming is ended when X is the diameter change before the top forming.

5. The outer ring shaping process of a double-row tapered roller bearing according to claim 1, characterized in that: When the outer ring of the double-row tapered roller bearing is made of bainite high-carbon chromium bearing steel, when forming is performed at the end with the larger diameter variation in step S400, the diameter variation Y after forming satisfies: Y=(0.5~2.0)X +(0.0~0.5mm) The top is finished when X is the diameter change before the top; When the end with the smaller diameter variation is subjected to the ejection molding in step S400, the diameter variation Y after ejection molding satisfies: Y=(0.5~1.5)X +(0.0~0.5mm) The top forming is ended when X is the diameter change before the top forming.

6. The outer ring shaping process of a double-row tapered roller bearing according to claim 1, characterized in that: Measuring the diameter variation of the outer diameter of the double-row tapered roller bearing outer ring includes: using a measuring tube ruler to rotate along the circumferential direction of the double-row tapered roller bearing outer ring, determining the low point and high point of the ring by the number of revolutions of the dial indicator pointer, and determining the diameter variation.

7. The outer ring shaping process of a double-row tapered roller bearing according to claim 6, characterized in that: When measuring the outer diameter of the outer ring of a double-row tapered roller bearing, the measuring position should be 10 mm to 15 mm away from the end face.

8. The outer ring shaping process of a double-row tapered roller bearing according to claim 6, characterized in that: The measuring ruler includes a ruler body, an abutment assembly slidably fixed to the ruler body, and a measuring table assembly slidably fixed to the ruler body.

9. The outer ring shaping process of a double-row tapered roller bearing according to claim 1, characterized in that: When the outer ring of the double-row tapered roller bearing is made of martensitic high-carbon chromium bearing steel, the shaping and tempering temperature of the tempering furnace for heating and holding in step S300 is 180°C to 200°C, and the shaping and tempering time is 10h to 15h; When the outer ring of the double-row tapered roller bearing is made of bainite high-carbon chromium bearing steel, the shaping and tempering temperature of the tempering furnace for heating and heat preservation in step S300 is 250°C to 270°C, and the shaping and tempering time is 10h to 15h.

10. The outer ring shaping process of a double-row tapered roller bearing according to claim 1, characterized in that: When the outer ring of the double-row tapered roller bearing is made of martensitic high-carbon chromium bearing steel, the shaping and tempering temperature of the tempering furnace for heating and holding in step S400 is 180° C. to 200° C., and the shaping and tempering time is 10 hours to 15 hours; When the outer ring of the double-row tapered roller bearing is made of bainite high-carbon chromium bearing steel, the shaping and tempering temperature of the tempering furnace for heating and holding in step S400 is 250°C to 270°C, and the shaping and tempering time is 10h to 15h.

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