Double-row tapered roller bearing outer ring shaping process

Abstract

The invention relates to the technical field of bearing ring shaping, in particular to a double-row tapered roller bearing outer ring shaping process. Measuring the outer diameter of the outer ring of the double-row tapered roller bearing close to the A end face, and marking a high point of deformation of the outer diameter of the A end face and a low point of deformation of the outer diameter of the A end face to obtain diameter variation; measuring the outer diameter of the outer ring of the double-row tapered roller bearing close to the B end face, and marking a high point of deformation of the outer diameter of the B end face and a low point of deformation of the outer diameter of the B end face to obtain diameter variation; the top type position is determined, a top type tool is started to be lifted, and the outer diameter deformation low point is changed into the outer diameter deformation high point through tool stress; and after shaping is finished, heating and heat preservation are conducted through a tempering furnace. According to the diameter variation of the end faces of the two sides of the outer ring of the double-row tapered roller bearing, a reasonable top form formula is determined, the shaping position and the top form degree are strictly controlled, and it is guaranteed that the diameter variation after shaping is within the allowance range through the large inversion amount.

Description

Technical Field

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

[0002] For a long time, there has been no unified shaping method for the heat treatment deformation of the outer ring of double-row tapered roller bearings, and the shaping effects have also been uneven. Summary of the invention

[0003] In view of the defects of the prior art, the present invention provides a double-row tapered roller bearing outer ring shaping process, which strictly controls the shaping position and the degree of top shaping according to the diameter change of the end faces on both sides of the double-row tapered roller bearing outer ring, and adopts a large reverse shaping amount to ensure that the diameter change after shaping is within the tolerance range.

[0004] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention 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: 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 change 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 of the B end face outer diameter deformation and the low point of the B end face outer diameter deformation to obtain the diameter change S B ; S200, The 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 the outer diameter deformation of end face A and the low point of the outer diameter deformation of end face A is less than 90°, the high point of the outer diameter deformation of end face A corresponds to the high point of the outer diameter deformation of end face B, the low point of the outer diameter deformation of end face A corresponds to the low point of the 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; The 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 the outer diameter deformation of end face A and the low point of the outer diameter deformation of end face A is less than 90°, the high point of the outer diameter deformation of end face A does not correspond to the high point of the outer diameter deformation of end face B, the low point of the outer diameter deformation of end face A does not correspond to the low point of the 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, S400 is started; S300, for the side where the diameter variation is greater than the standard deformation variable threshold, the outer diameter deformation low point is offset by 10 to 30 degrees to the side away from the deformation high point, and the top forming tooling is started, and the outer diameter deformation low point is turned into the outer diameter deformation high point by the tooling force, and another top forming tooling is installed on the side where the diameter variation is less than the standard deformation variable threshold, and the two top forming tooling spaces are vertically arranged; after the shaping is completed, the tempering furnace is used for heating and heat preservation; S400, comparison of diameter change S A And diameter variation S B , At the end with a larger diameter change, the outer diameter deformation low point is offset 10 to 20 degrees away from the deformation high point, and the top-type tooling is started. The outer diameter deformation low point is turned into the outer diameter deformation high point by the tooling force. At the end with a smaller diameter change, the outer diameter deformation low point is offset 10 to 20 degrees away from the deformation high point, and the top-type tooling is started. The outer diameter deformation low point is turned into the outer diameter deformation high point by the tooling force. After shaping, it is heated and kept warm in a tempering furnace.

[0005] Further, 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.

[0006] Further, 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.

[0007] Further, when the outer ring of the double-row tapered roller bearing is made of martensitic high-carbon chromium bearing steel, when the end with a larger diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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; When the end with the smaller diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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.

[0008] Further, when the outer ring of the double-row tapered roller bearing is made of bainite high-carbon chromium bearing steel, when the end with a larger diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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; When the end with the smaller diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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.

[0009] Furthermore, measuring the diameter variation of the outer diameter of the outer ring of the double-row tapered roller bearing includes: using a measuring tube ruler to rotate along the circumferential direction of the outer ring of the double-row tapered roller bearing, determining the low point and high point of the ring through the number of rotations of the pointer of the dial indicator, and determining the diameter variation.

[0010] Furthermore, when measuring the outer diameter of the outer ring of the double-row tapered roller bearing, the measuring position is 10 mm to 15 mm away from the end face.

[0011] Furthermore, 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.

[0012] Furthermore, 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 heat preservation 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.

[0013] Furthermore, 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 heat preservation in step S400 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 S400 is 250°C to 270°C, and the shaping and tempering time is 10h to 15h.

[0014] The beneficial effects of the present invention are as follows: the shaping position and the degree of top shaping are strictly controlled according to the diameter variation of the end faces on both sides of the outer ring of the double-row tapered roller bearing and the positions of the high and low points, and a large reverse shaping amount is used to ensure that the diameter variation after shaping is within the tolerance range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It 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 one embodiment of the present invention; Figure 2 It 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 invention; Figure 3 It is a schematic structural diagram of measuring the outer ring of a double-row tapered roller bearing in one embodiment of the present invention; Figure 4 It is a structural schematic diagram of a top-type tooling for mounting the outer ring of a double-row tapered roller bearing in one embodiment of the present invention; Figure 5 A table showing the allowable variation of the outer diameter of the ferrule in one embodiment of the present invention; Figure 6 Parameter table of Embodiment 1 to Embodiment 4 of the present invention; In the figure: a1, the deformation point of the outer diameter of the A end surface is high, a2, the deformation point of the outer diameter of the A end surface is low, b1, the deformation point of the outer diameter of the B end surface is high, b2, the deformation point of the outer diameter of the B end surface is low, 10. Top tooling, 20. Measuring pipe ruler, 21. Pipe ruler body, 22. Abutment assembly, 23. Measuring table assembly. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0017] See also Figure 1-Figure 4 A double-row tapered roller bearing outer ring shaping process is applicable 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: Step S100, measure the outer diameter of the double row tapered roller bearing outer ring near the A end face, and mark the high point a1 of the outer diameter deformation of the A end face and the low point a2 of the outer diameter deformation of the A end face 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 b1 and the low point b2 of the outer diameter deformation of the B end face to obtain the diameter change S B .

[0018] In one embodiment, measuring the diameter variation of the outer diameter of the outer ring of the double-row tapered roller bearing in step S100 includes: using a measuring ruler 20 to rotate along the circumferential direction of the outer ring of the double-row tapered roller bearing, determining the low point and the high point of the ring by the number of revolutions of the pointer of the dial indicator, and determining the diameter variation. Using the measuring ruler 20 to detect the outer diameters close to the two end faces respectively.

[0019] In one embodiment, the measuring ruler 20 includes a ruler body 21 , an abutment assembly 22 slidably fixed to the ruler body 21 , and a measuring gauge assembly 23 slidably fixed to the ruler body 21 .

[0020] See also Figure 1 and Figure 4 Step S200, such as the diameter change S A And diameter variation S B One of them is 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 1 m is less than 90°), the high point of the outer diameter deformation of the A end face corresponds to the high point of the outer diameter deformation of the B end face, the low point of the outer diameter deformation of the A end face corresponds to the low point of the outer diameter deformation of the B end face, and the diameter change S A And diameter variation S B When the difference between them is greater than 1 mm, step S300 is started.

[0021] See also Figure 2 , such as diameter change S A And diameter variation S B 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 m is less than 90°), the high point of the outer diameter deformation of the A end face does not correspond to the high point of the outer diameter deformation of the B end face, the low point of the outer diameter deformation of the A end face does not correspond to the low point of the outer diameter deformation of the B end face, 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.

[0022] Among them, the correspondence between the high point and the low point of the outer diameter deformation of the two end faces means that the high point a1 of the outer diameter deformation of the A end face corresponds to the high point b1 of the outer diameter deformation of the B end face, and the low point a2 of the outer diameter deformation of the A end face corresponds to the low point b2 of the outer diameter deformation of the B end face. Whether it corresponds is to determine whether the projection of the high point a1 of the outer diameter deformation of the A end face along the axial direction on the plane where the B end face is located coincides with the high point b1 of the outer diameter deformation of the B end face. Similarly, determine whether the projection of the low point a2 of the outer diameter deformation of the A end face along the axial direction on the plane where the B end face is located coincides with the low point b2 of the outer diameter deformation of the B end face. If they coincide, they correspond, and if they do not coincide, they do not correspond.

[0023] It should be noted that the standard deformation threshold is determined according to the national standard JB / T1255-2014 version, or is specified based on the national standard. In this embodiment, the standard deformation threshold can be Figure 5 Read out the table in .

[0024] 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 is shifted from the low point of deformation to the side away from the high point of deformation by 10 to 30 degrees ( 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, install 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, the tempering furnace is used for heating and insulation.

[0025] 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 is offset from the low point of deformation to the side away from the high point of deformation by 10 to 20 degrees ( Figure 2 n), start the top tooling and install it on Figure 2 At L1 in the figure, the axis of the top tool coincides with L1. The tool is subjected to force to make the outer diameter deformation low point become the outer diameter deformation high point. At the end with smaller diameter change, the top tool is offset 10 to 20 degrees from the outer diameter deformation low point to the side away from the deformation high point, and the top tool is installed. Figure 2 At L2 in the figure, the axis of the top tool coincides with L2, and the tool is subjected to force to turn the low point of outer diameter deformation into the high point of outer diameter deformation; After shaping, it is heated and kept warm in a tempering furnace.

[0026] The above-mentioned double-row tapered roller bearing outer ring shaping process strictly controls the shaping position and the degree of top shaping according to the diameter change of the end faces on both sides of the double-row tapered roller bearing outer ring and the corresponding relationship between the positions of the high point and the low point, avoids redundant measurement steps, and uses a large anti-shaping amount to ensure that the diameter change after shaping is within the tolerance range.

[0027] Further, 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.

[0028] Further, 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.

[0029] Further, when the outer ring of the double-row tapered roller bearing is made of martensitic high-carbon chromium bearing steel, when the end with a larger diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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; When the end with the smaller diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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.

[0030] In one embodiment, when the outer ring of the double-row tapered roller bearing is made of bainite high-carbon chromium bearing steel, when the end with a larger diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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; When the end with the smaller diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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.

[0031] The above-mentioned double-row tapered roller bearing outer ring shaping process determines the top shape formula corresponding to martensitic high-carbon chromium bearing steel and bainitic high-carbon chromium bearing steel according to the organizational structure type. The allowable range of the corresponding diameter change Y after shaping can be calculated according to the top shape formula, and the outer rings of different types of double-row tapered roller bearings can be shaped more specifically to further optimize the shaping effect.

[0032] In one embodiment, when measuring the outer diameter of the outer ring of the double-row tapered roller bearing, the measuring position is 10 mm to 15 mm away from the end surface.

[0033] See also Figure 1 and Figure 4 , take the vertical top-up embodiment as an example, specifically, the top-type tooling 10 is a screw top support. When performing the top-up operation, the top-type tooling 10 is installed to the determined position L1 or L2 of the top-type tooling 10, that is, the axis of the top-type tooling 10 coincides with the position L1 or L2 of the top-type tooling, and the nut on the screw top support is adjusted to perform the top-up. After the top-up is completed, the screw top support is not removed, and the measuring tube ruler 20 is used again to measure the deformation Y after the top-up. If the deformation Y after the top-up does not satisfy the top-up formula, the nut is continued to be adjusted for top-up until the deformation Y satisfies the top-up formula. In specific operations, the range of the diameter change amount Y after the top-up can be calculated according to the top-up formula. When the diameter change amount Y measured after the top-up falls within the range, it is considered that the low point of the outer diameter deformation is changed to the high point of the outer diameter deformation through the tooling force. Figure 2 The same applies to the embodiment of parallel top in the middle.

[0034] Preferably, in one embodiment, when the outer ring of the double-row tapered roller bearing is martensitic high-carbon chromium bearing steel, the shaping and tempering temperature of the tempering furnace for heating and heat preservation 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.

[0035] Preferably, in one embodiment, when the outer ring of the double-row tapered roller bearing is martensitic high-carbon chromium bearing steel, the shaping and tempering temperature of the tempering furnace for heating and heat preservation in step S400 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 S400 is 250°C to 270°C, and the shaping and tempering time is 10h to 15h.

[0036] It should be noted that, during specific measurements, the measurement can be performed at a distance of 15 mm from the A end surface. Similarly, the measurement can be performed at a distance of 15 mm from the B end surface.

[0037] See also Figure 6 In Example 1, a double-row tapered roller bearing outer ring shaping process is provided. The double-row tapered roller bearing outer ring has an A end face and a B end face and is made of high-carbon chromium bearing steel with a bainite structure. The standard deformation threshold value determined according to the type and size is 1.16 mm. The specific steps of the shaping process include: Step S100, measuring the outer diameter of the outer ring of the double-row tapered roller bearing close to the A end face, and marking the high point a1 of the outer diameter deformation of the A end face and the low point a2 of the outer diameter deformation of the A end face, and obtaining a diameter variation of 2.6 mm; Measure the outer diameter of the outer ring of the double-row tapered roller bearing close to the B end face, mark the high point b1 of the outer diameter deformation of the B end face and the low point b2 of the outer diameter deformation of the B end face, and obtain a diameter change of 1.1 mm.

[0038] Step S200: The diameter variation of end face A is greater than the standard deformation threshold, and the diameter variation of end face B is less than the standard deformation threshold, and 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° ( Figure 1 Where m is less than 90°), the high point of the outer diameter deformation of end face A corresponds to the high point of the outer diameter deformation of end face B, the low point of the outer diameter deformation of end face A corresponds to the low point of the outer diameter deformation of end face B, and the difference in deformation between the two end faces is greater than 1 mm, start step S300.

[0039] Step S300: for the A end face, shift the outer diameter deformation low point to the side away from the deformation high point by 10 to 30 degrees ( 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 low point of the outer diameter deformation become the high point of the outer diameter deformation. For the other top tool on the B end surface, 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, and the shaping tempering temperature is 270 degrees and the time is 10 hours.

[0040] The diameter variation Y after top forming in step S300 is 3.9 mm: X = 2.6 mm, Y = shaping ratio 1.5 * 2.6 mm + 0.0 = 3.9 mm.

[0041] The deformation after shaping and tempering was measured. The deformation of end face A was 0.8 mm, and the deformation of end face B was 0.6 mm. Both were smaller than the standard deformation threshold of 1.16 mm, meeting the shaping requirements.

[0042] See also Figure 6 In Example 2, a double-row tapered roller bearing outer ring shaping process is provided. 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 value determined according to the type and specification size is 1.6 mm. The specific steps of the shaping process include: Step S100, measuring the outer diameter of the outer ring of the double-row tapered roller bearing close to the A end face, and marking the high point a1 of the outer diameter deformation of the A end face and the low point a2 of the outer diameter deformation of the A end face, and obtaining a diameter variation of 2.9 mm; Measure the outer diameter of the double-row tapered roller bearing outer ring near the B end face, and mark the high point b1 and the low point b2 of the outer diameter deformation of the B end face, and obtain a diameter change of 1.3 mm.

[0043] Step S200: The diameter variation of end face A is greater than the standard deformation threshold, and the diameter variation of end face B is greater than the standard deformation threshold, and 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° ( Figure 1 Where m is less than 90°), the high point of the outer diameter deformation of end face A corresponds to the high point of the outer diameter deformation of end face B, the low point of the outer diameter deformation of end face A corresponds to the low point of the outer diameter deformation of end face B, and the difference in deformation between the two end faces is greater than 1 mm, start step S300.

[0044] Step S300: for the A end face, shift the outer diameter deformation low point to the side away from the deformation high point by 10 to 30 degrees ( 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 low point of the outer diameter deformation become the high point of the outer diameter deformation. For the other top tool on the B end surface, 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, and the shaping tempering temperature is 200 degrees and the time is 10 hours.

[0045] The diameter variation Y after top forming in step S300 is 5.7 mm: X = 2.9 mm, Y = shaping ratio 1.97 * 2.9 mm + 0.0 = 5.7 mm.

[0046] The deformation after shaping and tempering was measured. The deformation of end face A was 1.2mm, and the deformation of end face B was 0.8mm. Both were smaller than the standard deformation threshold of 1.6mm, meeting the shaping requirements.

[0047] See also Figure 6In Example 3, a double-row tapered roller bearing outer ring shaping process is provided. The double-row tapered roller bearing outer ring has an A end face and a B end face and is made of high-carbon chromium bearing steel with a bainite structure. The standard deformation threshold value determined according to the type and specification size is 1.16 mm. The specific steps of the shaping process include: Step S100, measuring the outer diameter of the outer ring of the double-row tapered roller bearing close to the A end face, and marking the high point a1 of the outer diameter deformation of the A end face and the low point a2 of the outer diameter deformation of the A end face, and obtaining a diameter variation of 2.9 mm; Measure the outer diameter of the double-row tapered roller bearing outer ring near the B end face, mark the high point b1 and the low point b2 of the outer diameter deformation of the B end face, and obtain a diameter change of 1.8 mm.

[0048] Step S200: The diameter variation of both end faces is greater than the standard deformation threshold of 1.16 mm; the angle between the high point of the outer diameter deformation of end face A and the low point of the outer diameter deformation of end face A is less than 90°; the high point of the outer diameter deformation of end face A does not correspond to the high point of the outer diameter deformation of end face B; the low point of the outer diameter deformation of end face A does not correspond to the low point of the 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; Step S400: On the side close to the A end face, the outer diameter is offset from the low point of deformation to the side away from the high point of deformation by 10 to 20 degrees ( Figure 2 n), start the top tooling and install it on Figure 2 At L1 in the figure, the axis of the top tool coincides with L1. The tool is subjected to force to make the outer diameter deformation low point become the outer diameter deformation high point. On the side close to the B end face, the top tool is offset 10 to 20 degrees from the outer diameter deformation low point to the side away from the deformation high point. Figure 2 At L2 in the figure, the axis of the top tool coincides with L2, and the tool is subjected to force to turn the low point of outer diameter deformation into the high point of outer diameter deformation; After shaping, it is heated and kept warm in a tempering furnace. The shaping and tempering temperature is 270 degrees and the time is 10 hours.

[0049] In step S400, at the end with the larger diameter variation, the diameter variation Y after top forming is 4.4 mm: X = 2.9 mm, Y = shaping ratio 1.52 * 2.9 mm + 0.0 = 4.4 mm.

[0050] When the top forming is performed at the end with the smaller diameter change, the diameter change Y after top forming is 2.5 mm: X = 1.8mm, Y = shaping ratio 1.39 * 1.8mm + 0.0 = 2.5mm The deformation after shaping and tempering was measured. The deformation of end face A was 0.9mm, and the deformation of end face B was 0.6mm. Both were smaller than the standard deformation threshold of 1.16mm, meeting the shaping requirements.

[0051] See also Figure 6 In Example 4, a double-row tapered roller bearing outer ring shaping process is provided. When 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. The specific steps of the shaping process include: Step S100, measuring the outer diameter of the outer ring of the double-row tapered roller bearing close to the A end face, and marking the high point a1 of the outer diameter deformation of the A end face and the low point a2 of the outer diameter deformation of the A end face, and obtaining a diameter variation of 3.5 mm; Measure the outer diameter of the outer ring of the double-row tapered roller bearing close to the B end face, mark the high point b1 of the outer diameter deformation of the B end face and the low point b2 of the outer diameter deformation of the B end face, and obtain a diameter change of 2.4 mm.

[0052] Step S200: The diameter variation of both end faces is greater than the standard deformation threshold of 1.6 mm; the angle between the high point of the outer diameter deformation of end face A and the low point of the outer diameter deformation of end face A is less than 90°; the high point of the outer diameter deformation of end face A does not correspond to the high point of the outer diameter deformation of end face B; the low point of the outer diameter deformation of end face A does not correspond to the low point of the 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; Step S400: On the side close to the A end face, the outer diameter is offset from the low point of deformation to the side away from the high point of deformation by 10 to 20 degrees ( Figure 2 n), start the top tooling and install it on Figure 2 At L1 in the figure, the axis of the top tool coincides with L1. The tool is subjected to force to make the outer diameter deformation low point become the outer diameter deformation high point. On the side close to the B end face, the top tool is offset 10 to 20 degrees from the outer diameter deformation low point to the side away from the deformation high point. Figure 2 At L2 in the figure, the axis of the top tool coincides with L2, and the tool is subjected to force to turn the low point of outer diameter deformation into the high point of outer diameter deformation; After shaping, it is heated and kept warm in a tempering furnace. The shaping and tempering temperature is 200 degrees and the time is 10 hours.

[0053] In step S400, at the end with the larger diameter variation, the diameter variation Y after top forming is 6.5 mm: X = 3.5mm, Y = shaping ratio 1.86 * 6.5mm + 0.0 = 6.5mm.

[0054] When the top forming is performed at the end with smaller diameter variation, the diameter variation Y after top forming is 3.12mm: X = 2.4 mm, Y = shaping ratio 1.3 * 2.4 mm + 0.0 = 3.12 mm The deformation after shaping and tempering was measured. The deformation of end face A was 1.1mm, and the deformation of end face B was 0.8mm. Both were smaller than the standard deformation threshold of 1.6mm, meeting the shaping requirements.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Claims

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, 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 change 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 of the B end face outer diameter deformation and the low point of the B end face outer diameter deformation to obtain the diameter change S B ; S200、 The 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 the outer diameter deformation of end face A and the low point of the outer diameter deformation of end face A is less than 90°, the high point of the outer diameter deformation of end face A corresponds to the high point of the outer diameter deformation of end face B, the low point of the outer diameter deformation of end face A corresponds to the low point of the 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; The 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 the outer diameter deformation of end face A and the low point of the outer diameter deformation of end face A is less than 90°, the high point of the outer diameter deformation of end face A does not correspond to the high point of the outer diameter deformation of end face B, the low point of the outer diameter deformation of end face A does not correspond to the low point of the 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, S400 is started; S300, for the side where the diameter variation is greater than the standard deformation variable threshold, the outer diameter deformation low point is offset by 10 to 30 degrees to the side away from the deformation high point, and the top-type tooling is started, and the outer diameter deformation low point is turned into the outer diameter deformation high point by the tooling force, and another top-type tooling is installed for the side where the diameter variation is less than the standard deformation variable threshold, and the two top-type tooling spaces are vertically arranged; After shaping, it is heated and kept warm in a tempering furnace; S400, comparison of diameter change S A And diameter variation S B , At the end with a larger diameter change, the outer diameter deformation low point is offset 10 to 20 degrees away from the deformation high point, and the top-type tooling is started. The outer diameter deformation low point is turned into the outer diameter deformation high point by the tooling force. At the end with a smaller diameter change, the outer diameter deformation low point is offset 10 to 20 degrees away from the deformation high point, and the top-type tooling is started. The outer diameter deformation low point is turned into the outer diameter deformation high point by the tooling force. 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 is 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 the end with the larger diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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; When the end with the smaller diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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 the end with the larger diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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; When the end with the smaller diameter variation is subjected to top forming in step S400, when the diameter variation Y after top forming 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 through the number of rotations of the pointer of the dial indicator, 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 1, characterized in that: The measuring ruler comprises 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 heat preservation 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 heat preservation in step S400 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 S400 is 250°C to 270°C, and the shaping and tempering time is 10h to 15h.

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