Improvement method of bearing steel ball crushing load detection positioning protection device

Abstract

The invention discloses an improvement method of a bearing steel ball crushing load detecting, positioning and protecting device, and relates to the technical field of part positioning and protecting device optimization and improvement. The objective of the invention is to solve the problem of low steel ball crushing load detection efficiency in a traditional detection method. The method comprises the following steps: processing the height of a steel ball feeding guide cylinder to be 2D according to the diameter D of a measured steel ball to obtain a cylindrical steel ball feeding guide cylinder; dividing along the diameter of the end face of the steel ball feeding guide cylinder to obtain two semi-cylinders; according to the structural design that 2D = R + D + R, transverse ball sockets in the shape of sugar-coated haws are machined in the cross sections of the two semi-cylinders in the axial direction; welding the outer diameter surfaces of the two semi-cylinders with the jaw of the clamp respectively; longitudinal ball sockets with the same curvature as the transverse ball sockets of the steel ball feeding guide cylinder are machined on the lower end face of the hydraulic rod and the upper surface of the base respectively. The improved method of the bearing steel ball crushing load detecting, positioning and protecting device can be obtained.

Description

Technical Field

[0001] This invention relates to the field of optimization and improvement technology of part positioning and protection devices, specifically to an improved method for a bearing steel ball crushing load detection, positioning and protection device. Background Technology

[0002] As a crucial component of ball bearings, steel balls have a significant impact on the bearing's lifespan, precision, vibration, and operational characteristics. The crushing load of a steel ball refers to the pressure it withstands when it breaks; it is an important indicator of the steel ball's overall performance and plays a vital role in ensuring the bearing's lifespan and dynamic performance.

[0003] When conducting crushing load testing, the industry-standard "three-ball method" is commonly used: three steel balls of the same size are placed coaxially (vertically) in each group, and the crushing load test is completed by continuously applying pressure to the group of steel balls through bottom hydraulic loading. The traditional method involves wrapping three steel balls with industrial paper towels, holding them longitudinally, placing the bottom ball on the testing machine platform, and applying pre-tightening force to the top ball with a hydraulic device to ensure the group of steel balls is fixed. Testing is then conducted after personnel have moved to a safe area. While this method meets the testing requirements, it has certain drawbacks and defects: 1. The preliminary preparation work is too cumbersome, affecting testing efficiency. Furthermore, using industrial paper towels as a simple fixing fixture leads to steel ball residue and paper towel fragments flying everywhere after the test, making them difficult to separate and clean. 2. It cannot be guaranteed that the center of each group of steel balls is coaxial with the hydraulic device: First, during the pressurization process, a certain steel ball may bounce before it is broken, causing damage to surrounding equipment and personnel; second, if the pressure is not applied in the direction of the maximum vector of the steel ball, the test results will not be consistent, which will lead to misjudgment of the performance indicators of the batch of steel balls.

[0004] Therefore, there is an urgent need to improve the positioning and protection device to solve the above-mentioned problems that occur during the bearing steel ball crushing load detection process. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of low efficiency in steel ball crushing load detection in traditional detection methods, and to provide an improved method for positioning and protecting bearing steel ball crushing load detection.

[0006] The improved method for the bearing steel ball crushing load detection and positioning protection device is carried out according to the following steps:

[0007] Step S1:

[0008] Based on the diameter D of the steel ball 7 being tested, the height of the steel ball feeding guide cylinder is 2D, resulting in a cylindrical steel ball feeding guide cylinder 4.

[0009] Step S2:

[0010] Divide along the diameter of the end face of the steel ball feeding guide cylinder 4 obtained in step S1 to obtain two semi-cylinders;

[0011] Step S3:

[0012] In step S2, the cross-sections of the two semi-cylinders are machined axially with a transverse spherical cavity consisting of a circular spherical cavity and two semi-circular spherical ...

[0013] Step S4:

[0014] The outer diameter surfaces of the two semi-cylinders are welded to the jaws of the clamp 3 respectively. The steel ball feeding guide cylinder 4 is clamped by manipulating the clamp 3, thereby fixing the steel ball 7 to be tested.

[0015] Step S5:

[0016] Longitudinal ball sockets with the same curvature as the transverse ball sockets of the steel ball feeding guide cylinder 4 are machined on the lower end face of the hydraulic rod 5 and the upper surface of the base 6 respectively, to ensure that half of the steel ball 7 being tested is placed in the longitudinal ball socket.

[0017] The beneficial effects of this invention are:

[0018] (1) The present invention provides a positioning protection device to replace the existing manual positioning method, while ensuring the safety and reliability of the test process and the high consistency of the test data, thus solving the problem of low efficiency in steel ball crushing load detection.

[0019] (2) The improved bearing steel ball crushing detection, positioning and protection device of the present invention can replace the traditional manual clamping and positioning method. It is simple to operate and can be reused. At the same time, it improves the phenomenon that vertical feeding can easily cause the steel balls to slip.

[0020] This invention provides an improved method for detecting and protecting bearing steel ball crushing load. Attached Figure Description

[0021] Figure 1 This diagram shows the crushing test results of a steel ball with a fixed specification using the original device.

[0022] Figure 2 The image shows the crushing test results of a steel ball of fixed specifications using an improved device.

[0023] Figure 3 This diagram shows the crushing test results of two steel balls with fixed specifications using the original device.

[0024] Figure 4 This diagram shows the crushing test results of a steel ball of fixed specification using an improved device.

[0025] Figure 5 This diagram shows the crushing test results of three steel balls with fixed specifications using the original device.

[0026] Figure 6 This diagram shows the crushing test results of three steel balls of fixed specifications using an improved device.

[0027] Figure 7 This is a schematic diagram of the bearing steel ball crushing load detection and positioning protection device of the present invention;

[0028] Figure 8 This is a three-dimensional diagram showing the bearing steel ball crushing load detection and positioning protection device of the present invention. Detailed Implementation

[0029] Specific Implementation Method 1: The improved method for the bearing steel ball crushing load detection and positioning protection device in this implementation method is carried out according to the following steps:

[0030] Step S1:

[0031] Based on the diameter D of the steel ball 7 being tested, the height of the steel ball feeding guide cylinder is 2D, resulting in a cylindrical steel ball feeding guide cylinder 4.

[0032] Step S2:

[0033] Divide along the diameter of the end face of the steel ball feeding guide cylinder 4 obtained in step S1 to obtain two semi-cylinders;

[0034] Step S3:

[0035] In step S2, the cross-sections of the two semi-cylinders are machined axially with a transverse spherical cavity consisting of a circular spherical cavity and two semi-circular spherical ...

[0036] Step S4:

[0037] The outer diameter surfaces of the two semi-cylinders are welded to the jaws of the clamp 3 respectively. The steel ball feeding guide cylinder 4 is clamped by manipulating the clamp 3, thereby fixing the steel ball 7 to be tested.

[0038] Step S5:

[0039] Longitudinal ball sockets with the same curvature as the transverse ball sockets of the steel ball feeding guide cylinder 4 are machined on the lower end face of the hydraulic rod 5 and the upper surface of the base 6 respectively, to ensure that half of the steel ball 7 being tested is placed in the longitudinal ball socket.

[0040] Specific Implementation Method Two: The difference between this implementation method and Specific Implementation Method One is that the diameter Ф of the steel ball 7 being tested is 3mm~50mm.

[0041] The other steps are the same as in Specific Implementation Method 1.

[0042] Specific Implementation Method 3: The difference between this implementation method and Specific Implementation Method 1 or 2 is that the clamps 3 are stainless steel fire tongs.

[0043] The other steps are the same as in Specific Implementation Method 1 or 2.

[0044] Specific Implementation Method Four: The difference between this implementation method and Specific Implementation Methods One to Three is that the bearing steel ball crushing load detection and positioning protection device is equipped with a protective cover 2.

[0045] The other steps are the same as those in Specific Implementation Methods One to Three.

[0046] Specific Implementation Method 5: The difference between this implementation method and Specific Implementation Methods 1 to 4 is that an annular clamp seat 1 is provided on the outer diameter of the hydraulic rod 5.

[0047] The other steps are the same as those in Specific Implementation Methods One through Four.

[0048] Specific Implementation Method Six: The difference between this implementation method and Specific Implementation Methods One to Five is that the annular clamp seat 1 and the hydraulic rod 5 are in clearance fit.

[0049] The other steps are the same as those in Specific Implementation Methods 1 to 5.

[0050] The beneficial effects of the present invention are verified using the following embodiments:

[0051] Example 1: An improved method for a bearing steel ball crushing load detection and positioning protection device, which is carried out according to the following steps:

[0052] Inspired by the ancient Chinese concepts of "copper coins" and "candied hawthorn skewers," a steel ball feeding guide cylinder was designed and further optimized to form a combined device with ball sockets. The "copper coin" refers to the cylindrical shape of the steel ball feeding guide cylinder 4 viewed from above, with a square hole at the top. The "candied hawthorn skewer structure" refers to the resemblance of the horizontal and vertical ball sockets to the shape of a candied hawthorn skewer.

[0053] Step S1:

[0054] Based on the diameter D of the steel ball 7 to be tested, and to meet the requirement that three steel balls need to be stacked during testing, the height of the steel ball feeding guide cylinder is 2D, resulting in a cylindrical steel ball feeding guide cylinder 4.

[0055] Step S2:

[0056] Divide the steel ball feeding guide cylinder 4 along the diameter of the end face obtained in step S1, and divide the steel ball feeding guide cylinder 4 into two parts to obtain two semi-cylinders.

[0057] Step S3:

[0058] According to the structural design of 2D=R+D+R (R is the radius of the steel ball), the cross-sections of the two semi-cylinders obtained in step S2 are machined along the axial direction with a transverse spherical cavity in the shape of a "candied hawthorn" consisting of a circular spherical cavity and two semi-circular spherical ...

[0059] Step S4:

[0060] To reduce the danger of personnel handling the feeding guide cylinder by hand, the outer diameter surfaces of the two semi-cylinders are welded to the jaws of the clamp 3. The steel ball feeding guide cylinder 4 is clamped by manipulating the clamp 3, thereby fixing the steel ball 7 to be tested. At the same time, it saves the time and steps of moving the guide cylinder after the hydraulic system applies pre-tightening force to the group of steel balls.

[0061] Step S5:

[0062] Longitudinal ball sockets with the same curvature as the transverse ball sockets of the steel ball feeding guide cylinder 4 are machined on the lower end face of the hydraulic rod 5 and the upper surface of the base 6, respectively, to ensure that half of the steel ball 7 being tested is placed in the longitudinal ball socket. From the geometric relationship, it can be deduced that the combined device at this time has achieved the requirement of fixing the group of steel balls and that the steel ball in the middle position is in contact with the top and bottom steel balls at the same time.

[0063] The principle of this embodiment:

[0064] After clamping the three steel balls with clamps, place half of the bottom steel ball in the longitudinal ball socket, and then drive the hydraulic rod to fall down and contact the top steel ball to achieve coaxial fixation of the three steel balls, and then perform steel ball crushing test.

[0065] Field tests verified that the device achieved the expected safety and practicality. The test process was safe and reliable; the hydraulic device did not bounce during the pressurization of the steel balls, causing no harm to surrounding equipment or personnel. Furthermore, this device ensures that the center of each group of steel balls is coaxial with the hydraulic device, resulting in high consistency of test data without significant fluctuations. The efficiency of steel ball crushing load testing is improved by over 70%. Multiple sets of this device can be designed and customized for steel balls ranging from Ф3mm to Ф50mm to meet the needs of scientific research and production tasks. While the original device also yielded acceptable test values, it could not guarantee that the center of each group of steel balls was coaxial with the hydraulic device, leading to excessive fluctuations in the test values ​​and making the test data unreliable.

[0066] Table 1: Comparison of crushing test results for steel balls of specification 1;

[0067]

[0068] Table 2: Comparison of crushing test results for steel balls of specification 2;

[0069]

[0070] Table 3: Comparison of crushing test results for steel balls of specification three;

[0071]

[0072] Note: The original device involved wrapping three steel balls in industrial paper or a rag, placing them between the lower end of the hydraulic rod 5 and the upper surface of the base 6, and then removing the paper or rag. The drawback of this method is that it is difficult to ensure that the centers of the three steel balls are coaxial with the hydraulic device, resulting in inaccurate positioning. Furthermore, manually moving the steel balls could pose a danger to the operator.

Claims

1. Improved method for detecting the crushing load of a bearing steel ball positioning protection device, characterized in that, The improved method is carried out in the following steps: Step S1: According to the diameter D of the measured steel ball (7), the height of the steel ball feeding cylinder is 2D, and a cylindrical steel ball feeding cylinder (4) is obtained; Step S2: The end face of the steel ball feeding cylinder (4) obtained in step S1 is segmented along the diameter to obtain two half cylinders; Step S3: The cross section of the two half cylinders obtained in step S2 is processed in the axial direction to form a transverse ball socket composed of a circular ball socket and two semicircular ball sockets, and the two semicircular ball sockets are arranged at the two ends of the circular ball socket; the middle ball socket of the steel ball feeding cylinder (4) can hold the entire measured steel ball (7), and the upper and lower semicircular ball sockets each hold 1 / 2 of the measured steel ball (7), and a square hole is formed on each end face of the steel ball feeding cylinder (4) and communicates with the transverse ball socket, and the side length of the square hole is equal to the diameter D of the measured steel ball (7); Step S4: The outer diameter surfaces of the two half cylinders are respectively welded with the jaws of the clamp (3), the clamp (3) is controlled to realize the clamping of the steel ball feeding cylinder (4), and then the fixation of the measured steel ball (7) is realized; Step S5: A longitudinal ball socket with the same curvature as the transverse ball socket of the steel ball feeding cylinder (4) is respectively formed on the lower end face of the hydraulic rod (5) and the upper surface of the base (6), so that 1 / 2 of the measured steel ball (7) is placed in the longitudinal ball socket.

2. The improved method of bearing steel ball crush load detection positioning guard according to claim 1, wherein, The diameter of the measured steel ball (7) is Ф3mm-50mm.

3. The improved method of claim 1, wherein, The clamp (3) is a stainless steel tongs.

4. The improved method of claim 1, wherein, The bearing steel ball crushing load detection positioning protection device is provided with a protective cover (2).

5. The improved method of claim 1, wherein, The outer diameter of the hydraulic rod (5) is provided with an annular clamp seat (1).

6. The improved method of claim 5, wherein, The annular clamp seat (1) is in clearance fit with the hydraulic rod (5).

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