Fine grinding method for outer ring raceway of wide bearing

Abstract

The invention relates to an outer ring raceway lapping method, in particular to an outer ring raceway lapping method of a wide bearing. The invention aims to solve the problems that the upper end face of the outer ring interferes with a lapping head and the oscillation position of oilstone is not consistent with the position of a raceway when the raceway of the outer ring of the wide bearing is ground by using the existing lapping machine. Firstly, a grinding tool and an oilstone clamp 1 are optimized, the interference phenomenon during machining is avoided, and the lapping machining condition of the wide bearing outer ring is met; secondly, the original grinding fulcrum 3 is sleeved with the sleeve 3-1, the outer diameter size of the grinding fulcrum 3 is increased, the machining range of the lapping machine is enlarged, and the machining capacity is expanded; and meanwhile, the sleeve made of the non-metal material is low in hardness, so that the influence on the surface quality is avoided, the appearance quality of the bearing outer ring after lapping is improved, and machining marks are completely eradicated. The invention belongs to the technical field of bearing raceway grinding.

Description

Technical Field

[0001] The invention relates to a method for lapping an outer ring raceway, in particular to a method for lapping an outer ring raceway of a wide-width bearing, and belongs to the technical field of bearing raceway grinding. Background Art

[0002] In order to better meet the performance requirements of the bearings, the bearing structure design takes into account the use environment and installation conditions for integrated design, such as spring-supported structure design, structure design with mounting ribs, etc. This increases the difficulty of design and processing, and also places higher demands on the processing capabilities of the equipment.

[0003] The outer ring of a certain type of single-rib short cylindrical roller bearing is integrally provided with a mounting plate, and the width of the outer ring of the bearing is also more than 100 mm. The following problems exist when using the existing CNC lapping machine:

[0004] Due to the excessive width of the outer ring, the lapping head interferes with the upper end surface of the outer ring during the feeding and retracting process during processing; secondly, due to the limitation of the lapping machine's processing stroke, the oscillation position of the oilstone is higher than the ring raceway position, which exceeds the processing range of the existing equipment.

[0005] Secondly, the outer ring accuracy and surface quality requirements of this model are very high. Even if the existing equipment can meet the processing range, the defects of the grinding tooling will result in low product quality and unstable accuracy, which will lead to the failure to meet the product's accuracy requirements.

[0006] In summary, how to propose a refined research method for the above-mentioned technical problems has become an urgent problem to be solved by technicians in this field. Summary of the invention

[0007] In view of the above-mentioned deficiencies in the prior art, the present invention provides a method for fine grinding of the outer ring raceway of a wide-width bearing.

[0008] The technical solution of the present invention is: a method for lapping the outer ring raceway of a wide-width bearing, which is specifically carried out in the following steps:

[0009] Step 1: Optimize grinding tooling

[0010] Step 11: reduce the axial height of the tire cushion, increase the cross-sectional area of ​​the tire cushion, and ensure that the outer diameter of the tire cushion is smaller than the outer diameter of the bearing outer ring;

[0011] Step 1 and 2: Lengthen the length of the oilstone fixture;

[0012] Step 13: Optimize the grinding fulcrum

[0013] The original grinding fulcrum adopts a rolling bearing as the fulcrum, and a sleeve made of non-metallic material is mounted on the outer circumference of the original grinding fulcrum;

[0014] Step 2: Assemble the grinding tool

[0015] Step 21: Install the tire cushion on the lapping machine and fix it;

[0016] Step 22: Place the outer ring of the bearing to be ground coaxially on the tire cushion;

[0017] Step 2: Install and fix several grinding fulcrums on the lapping machine, and ensure that the grinding fulcrums are distributed around the outer ring of the bearing at equal angles, and the outer circumferential surface of the sleeve abuts against the outer circumferential surface of the outer ring of the bearing;

[0018] Step 3: Grinding the raceway

[0019] An oil stone is installed on the oil stone fixture, and the outer ring of the bearing to be ground is subjected to rough grinding, fine grinding, semi-finishing grinding and finishing grinding in sequence.

[0020] Compared with the prior art, the present invention has the following effects:

[0021] 1. The present invention optimizes the grinding tool and the oilstone fixture 1 to avoid interference during processing and meet the conditions for fine grinding of the outer ring of a wide-width bearing.

[0022] 2. The sleeve 3-1 is installed on the original grinding fulcrum 3, which increases the outer diameter of the grinding fulcrum 3, expands the processing range of the lapping machine, and expands the processing capacity.

[0023] 3. The appearance quality of the bearing outer ring 4 after fine grinding is improved, and processing marks are eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a top view of the grinding tooling of the present invention after optimization;

[0025] Figure 2 It is a schematic diagram of the sleeve 3-1 of the grinding fulcrum 3 of the present invention;

[0026] Figure 3 is a schematic diagram of a tire pad 2 of the present invention;

[0027] Figure 4 is a cross-sectional view of the grinding tooling of the present invention after optimization;

[0028] Figure 5 It is a schematic diagram of the present invention when grinding the raceway.

[0029] In the figure: 1. Oilstone fixture; 2. Tire pad; 3. Grinding fulcrum; 3-1. Sleeve; 4. Bearing outer ring. DETAILED DESCRIPTION

[0030] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] Specific implementation method 1: Combination Figures 1 to 5 The present embodiment is described. The present embodiment is a method for lapping the outer ring raceway of a wide-width bearing. The method is specifically performed in the following steps:

[0032] Step 1: Optimize grinding tooling

[0033] Step 11: lower the axial height of the tire cushion 2, increase the cross-sectional area of ​​the tire cushion 2, and ensure that the outer diameter of the tire cushion 2 is smaller than the outer diameter of the bearing outer ring 4. This arrangement increases the contact area between the tire cushion 2 and the end surface of the bearing outer ring 4, enhances the clamping stability during processing, and reduces the depth of the mark caused by the tire cushion 2 on the end surface of the bearing outer ring 4;

[0034] Step 1 and 2, lengthen the length of the oilstone fixture 1. By setting it in this way, by "lowering the height of the tire cushion 2 + lengthening the length of the oilstone fixture 1", the oilstone is exactly at the position of the raceway, and no interference will occur during the processing;

[0035] Step 13: Optimize grinding fulcrum 3

[0036] The original grinding fulcrum 3 uses a rolling bearing as a fulcrum, and a non-metallic sleeve 3-1 is mounted on the outer circumferential surface of the original grinding fulcrum 3; since the original grinding fulcrum 3 is tightly against the bearing outer ring 4 during the grinding process and rotates at high speed with the bearing outer ring 4, it is easy to cause obvious marks on the outer circumferential surface of the bearing outer ring 4, thereby affecting the surface quality of the product; the non-metallic sleeve 3-1 has a low hardness, which avoids affecting the surface quality, and at the same time increases the outer diameter of the grinding fulcrum 3, expanding its scope of use.

[0037] Step 2: Assemble the grinding tool

[0038] Step 21: Install the tire pad 2 on the lapping machine and fix it;

[0039] Step 22: Place the bearing outer ring 4 to be ground coaxially on the tire cushion 2;

[0040] Step 23: Install and fix several grinding fulcrums 3 on the lapping machine, and ensure that the grinding fulcrums 3 are distributed around the bearing outer ring 4 at equal angles, and the outer circumferential surface of the sleeve 3-1 abuts against the outer circumferential surface of the bearing outer ring 4;

[0041] Step 3: Grinding the raceway

[0042] An oil stone is installed on the oil stone fixture 1, and the outer ring 4 of the bearing to be ground is subjected to rough grinding, fine grinding, semi-finishing grinding and finishing grinding in sequence.

[0043] Specific implementation method 2: Combination Figure 1 , Figure 4 and Figure 5 To illustrate this embodiment, in steps one and two of this embodiment, the oilstone fixture 1 is lengthened by 30 mm; since the width of the bearing outer ring 4 exceeds the conventional size, the oilstone fixture 1 needs to be lengthened as a whole, and the working stroke of the equipment needs to be considered to avoid interference during processing; according to the height of the tire pad 2, the working stroke of the oilstone fixture 1 and other dimensions, the oilstone fixture 1 is lengthened by 30 mm, which not only meets the processing conditions of the bearing outer ring 4, but also ensures the processing quality.

[0044] Furthermore, in step 1-3, the material of the sleeve 3-1 is nylon.

[0045] Furthermore, in steps two and three, three grinding fulcrums 3 are installed on the lapping machine.

[0046] Furthermore, in step three, a Dalmann CB6 or CB12 oilstone is used to grind the raceway; in this embodiment, the thickness of the oilstone is 16 mm, the thickness of the oilstone is small, the contact surface of the lapping is reduced, and the linearity of the lapping is improved.

[0047] Other components and connection relationships are the same as those in the first specific implementation method.

[0048] Specific implementation method three: Combination Figures 1 to 5 To illustrate this embodiment, in step 3 of this embodiment, a Dalman CB12 oilstone is used for rough grinding of the raceway, and the processing parameters are:

[0049] The processing time is 10s, the spindle speed is 125r / min, the oilstone oscillation frequency is 1200 times / min, and the oilstone pressure is 100N.

[0050] Furthermore, in step 3, a Dalman CB12 oilstone is used for grinding the raceway, and the processing parameters are:

[0051] The processing time is 8s, the spindle speed is 138r / min, the oilstone oscillation frequency is 1100 times / min, and the oilstone pressure is 100N.

[0052] Furthermore, in step 3, the semi-finishing grinding of the raceway is performed using a Dahlmann CB6 oilstone, and the processing parameters are:

[0053] The processing time is 6s, the spindle speed is 138r / min, the oilstone oscillation frequency is 1000 times / min, and the oilstone pressure is 100N.

[0054] Furthermore, in step 3, a Dalman CB6 oilstone is used for grinding the raceway, and the processing parameters are:

[0055] The processing time is 3s, the spindle speed is 156r / min, the oilstone oscillation frequency is 450 times / min, and the oilstone pressure is 100N.

[0056] The other components and connection relationships are the same as those in the first or second specific implementation.

[0057] The present invention has been disclosed as above in the form of a preferred embodiment, but it is not intended to limit the present invention. Any simple modification, equivalent changes and modifications made to the above implementation cases by any professional and technical personnel who do not deviate from the content of the technical solution of the present invention and based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for lapping the outer ring raceway of a wide bearing, characterized in that: The method is specifically carried out in the following steps: Step 1: Optimize grinding tooling Step 11: lowering the axial height of the tire cushion (2), increasing the cross-sectional area of ​​the tire cushion (2), and ensuring that the outer diameter of the tire cushion (2) is smaller than the outer diameter of the bearing outer ring (4); Step 1 and 2, lengthen the oilstone fixture (1); Step 13: Optimize grinding fulcrum (3) The original grinding fulcrum (3) uses a rolling bearing as a fulcrum, and a sleeve (3-1) made of a non-metallic material is sleeved on the outer circumferential surface of the original grinding fulcrum (3); Step 2: Assemble the grinding tool Step 21: Install the tire cushion (2) on the lapping machine and fix it; Step 22: Place the outer ring of the bearing to be ground (4) coaxially on the tire cushion (2); Step 2-3: install and fix a plurality of grinding fulcrums (3) on a lapping machine, and ensure that the grinding fulcrums (3) are distributed around the outer ring (4) of the bearing at equal angles, and the outer circumferential surface of the sleeve (3-1) abuts against the outer circumferential surface of the outer ring (4) of the bearing; Step 3: Grinding the raceway An oil stone is installed on an oil stone fixture (1) to sequentially grind the raceway, grind the raceway, grind the semi-finishing raceway and grind the raceway of the outer ring of the bearing (4) to be ground.

2. The method for lapping the outer ring raceway of a wide bearing according to claim 1, characterized in that: In the steps 1 and 2, the oilstone fixture (1) is lengthened by 30 mm.

3. The method for lapping the outer ring raceway of a wide bearing according to claim 1, characterized in that: The material of the sleeve (3-1) in step 1-3 is nylon.

4. The method for lapping the outer ring raceway of a wide bearing according to claim 1, characterized in that: In the steps 2 and 3, three grinding fulcrums (3) are installed on the lapping machine.

5. The method for lapping the outer ring raceway of a wide bearing according to claim 1, characterized in that: In the step 3, a Dalman CB6 or CB12 oilstone is used to grind the raceway.

6. The method for lapping the outer ring raceway of a wide bearing according to claim 1, characterized in that: In the step 3, the Dalman CB12 oilstone is used for rough grinding of the raceway, and the processing parameters are: The processing time is 10s. The spindle speed is 125r / min, The oilstone oscillation frequency is 1200 times / min. The oilstone pressure is 100N.

7. The method for lapping the outer ring raceway of a wide bearing according to claim 1, characterized in that: In the step 3, the raceway is finely ground using a Dalman CB12 oilstone, and the processing parameters are: The processing time is 8s. The spindle speed is 138r / min, The oilstone oscillation frequency is 1100 times / min. The oilstone pressure is 100N.

8. The method for lapping the outer ring raceway of a wide bearing according to claim 1, characterized in that: In the step 3, the semi-finishing grinding of the raceway is performed by using a Dalman CB6 oilstone, and the processing parameters are: The processing time is 6s. The spindle speed is 138r / min, The oilstone oscillation frequency is 1000 times / min. The oilstone pressure is 100N.

9. The method for lapping the outer ring raceway of a wide bearing according to claim 1, characterized in that: In the step 3, the raceway is ground with a Dalman CB6 oilstone, and the processing parameters are: The processing time is 3s. The spindle speed is 156r / min, The oilstone oscillation frequency is 450 times / min. The oilstone pressure is 100N.

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