A device for measuring and adjusting eccentricity of grinding

Abstract

This invention discloses a device for measuring and adjusting the eccentricity of grinding operations, relating to the field of grinding. It includes an upper slide block, a lower slide block, a dial indicator, a transmission worm gear, and a three-jaw chuck. One side of the three-jaw chuck clamps and positions the workpiece to be measured, while the lower slide block is fixed to the other side. An upper slide block is positioned above the lower slide block, and the transmission worm gear is rotatably mounted within the upper slide block, with the worm gear and lower slide block being threadedly driven. A dial indicator is mounted on the upper slide block, with its measuring head resting on the surface of the lower slide block. A positioning rod is mounted on the upper slide block and connected to the grinding machine spindle via a magnetic clamp. This invention provides a simple and easy-to-operate magnetic support device for measuring and adjusting the eccentricity of grinding operations. This device allows for rapid measurement of the specific value of the eccentricity during grinding operations and can be used with a support block to adjust the eccentricity to the required value. This is beneficial for research and analysis of grinding operations, improving product quality, and analyzing product failures.

Description

Technical Field

[0001] This invention relates to the field of grinding, and more specifically to a device for measuring and adjusting the eccentricity of grinding. Background Technology

[0002] Grinding, also known as milling, is a common machining process in the field of mechanical processing. During grinding, the actual center of rotation of the workpiece will deviate from the center of the spindle; the distance of this deviation is called eccentricity. The presence of eccentricity reduces the grinding accuracy of the workpiece, affecting its subsequent processing and use. In the bearing manufacturing industry, the adjustment and measurement of eccentricity in electromagnetic centerless clamps has always been a difficult problem to solve. Currently, there is no dedicated measuring tool for eccentricity measurement; it mainly relies on experienced operators to repeatedly adjust and measure. Traditional measurement methods are very difficult and fail to obtain accurate values, causing many unnecessary troubles in the work. Manual adjustment has a low success rate and is time-consuming, resulting in low overall efficiency. Manual adjustment of the actual eccentricity cannot be precisely controlled; it can only be indirectly verified through trial grinding.

[0003] Chinese patent document (CN205651220U) discloses an eccentric adjustment device for an electromagnetic centerless clamp for bearing rings, comprising a circular eccentric sleeve, a first positioning block fixedly connected to the eccentric sleeve, a circular eccentric ring connected to the eccentric sleeve, and a second positioning block fixedly connected to the eccentric ring; the first positioning block includes an eccentric sleeve connecting part and an adjusting part, and the eccentric ring has a strip-shaped hole formed along the diameter direction that is slidably connected to the adjusting part a on the first positioning block; the second positioning block includes an eccentric ring connecting part and an adjusting part b. By adjusting the distance between the first positioning block and the second positioning block, the eccentricity of the eccentric ring relative to the eccentric sleeve can be easily adjusted, thereby facilitating the adjustment of the eccentricity of the two support blocks.

[0004] However, this technical solution is only used for adjustment and cannot be used to measure eccentricity. Furthermore, the structure is relatively complex, requiring too many fixed actuators for each adjustment. In addition, it is necessary to manufacture eccentricity standard blocks and standard measuring rings, resulting in poor versatility and flexibility. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a device for measuring and adjusting the eccentricity of grinding processes. This device allows for the rapid measurement of the specific value of the eccentricity during grinding and, in conjunction with a support block, the eccentricity can be adjusted to the required value. This is beneficial for the research and analysis of grinding processes, improving product quality, and for the analysis and research of product failures.

[0006] The objective of this invention is achieved through the following technical solution: This device for measuring and adjusting the eccentricity of grinding processes includes an upper slide block, a lower slide block, a dial indicator, a transmission worm gear, and a three-jaw chuck. One side of the three-jaw chuck holds and positions the workpiece to be measured via jaws, and a chuck positioning block is fixed to the other side of the chuck. The lower slide block is fixed to the three-jaw chuck via the chuck positioning block. An upper slide block is positioned above the lower slide block, and the transmission worm gear is rotatably mounted within the upper slide block. One end of the transmission worm gear extends out of the upper slide block, and the other end of the transmission worm gear is threadedly connected to the lower slide block. The lower slide has a guide hole, one end of the guide rod is fixed inside the upper slide, and the other end of the guide rod is supported in the guide hole. When the transmission worm gear drives the lower slide to move relative to the upper slide, it is guided by the guide rod. A dial indicator is installed on the upper slide, and the measuring head of the dial indicator is placed on the surface of the lower slide to measure the distance the lower slide moves relative to the upper slide. A positioning rod is installed on the surface of the upper slide away from the three-jaw chuck. The positioning rod is connected to the grinding machine spindle through a magnetic clamp. When the upper slide and the lower slide are closed, the rotation center of the workpiece being measured coincides with the rotation center of the grinding machine spindle.

[0007] As a further technical solution, a baffle is installed at the position where the transmission worm extends out of the upper slider. The baffle is used to limit the stroke of the axial movement of the transmission worm.

[0008] As a further technical solution, the chuck positioning block is fixed and positioned at the center hole of the three-jaw chuck by a positioning post.

[0009] As a further technical solution, the guide holes are symmetrically opened on both sides of the lower slider, and a sleeve-type linear ball bearing is installed in the guide hole by a snap ring, and the guide rod is supported by the sleeve-type linear ball bearing.

[0010] As a further technical solution, the positioning rod is fixed on the upper slider by a central positioning block.

[0011] As a further technical solution, an avoidance groove is provided on the lower slider at a position corresponding to the positioning rod.

[0012] The beneficial effects of this invention are as follows:

[0013] 1. The distance between the rotation center of the workpiece to be measured and the rotation center of the grinding machine spindle is converted into the distance of relative movement between the upper and lower sliders, and displayed visually using a dial indicator to realize the measurement of grinding eccentricity;

[0014] 2. This device can quickly and easily detect and adjust the specific value of the eccentricity in grinding. At the same time, the device has a simple structure, is easy to operate, and has strong versatility, making it suitable for various measurement scenarios. It is beneficial for the research and analysis of grinding processes, improving product quality, and conducting analysis and research after product failure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0017] Figure 3 This is a schematic diagram of the left-side structure of the present invention.

[0018] Figure 4 for Figure 3 AA sectional view.

[0019] Figure 5 This is a schematic diagram of the structure during measurement according to the present invention.

[0020] Figure 6 This is a schematic diagram of the connection structure between the chuck positioning block and the three-jaw chuck in this invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Upper slider; 2. Lower slider; 3. Sleeve-type linear ball bearing; 4. Guide rod; 5. Snap ring; 6. Dial indicator; 7. Transmission worm gear; 8. Positioning rod; 9. Three-jaw chuck; 10. Baffle; 11. Workpiece to be measured; 12. Magnetic clamp; 13. Chuck positioning block; 14. Chuck center hole; 15. Positioning pin; 16. Guide hole; 17. Shaft positioning block; 18. Clearance groove. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings:

[0023] Example: As attached Figures 1-6 As shown, this device for measuring and adjusting the eccentricity of grinding includes an upper slider 1, a lower slider 2, a sleeve-type linear ball bearing 3, a guide rod 4, a retaining ring 5, a dial indicator 6, a transmission worm gear 7, a positioning rod 8, a three-jaw chuck 9, a baffle 10, a workpiece to be measured 11, a magnetic clamp 12, a chuck positioning block 13, a chuck center hole 14, a positioning pin 15, a guide hole 16, a shaft positioning block 17, and a clearance groove 18.

[0024] like Figure 5 As shown, the left side of the three-jaw chuck 9 holds and positions the workpiece 11 to be measured via jaws, and the axis of rotation of the workpiece 11 is the axis of rotation. Figure 5 In the middle O1, a chuck positioning block 13 is fixed to the right side of the three-jaw chuck 9, and the lower slider 2 is fixed to the three-jaw chuck 9 through the chuck positioning block 13. (See attached reference.) Figure 1 An upper slide block 1 is positioned above the lower slide block 2. A transmission worm gear 7 is rotatably mounted inside the upper slide block 1. The upper end of the transmission worm gear 7 extends out of the upper slide block 1, allowing the inspector to hold and rotate it. The lower end of the transmission worm gear 7 is connected to the lower slide block 2 via a threaded connection. Figure 4As shown, guide holes 16 are opened on both sides of the lower slider 2. The upper end of the guide rod 4 is fixed (interference fit) inside the upper slider 1, and the lower end of the guide rod 4 is supported in the guide hole 16. Preferably, a sleeve-type linear ball bearing 3 is installed in the guide hole 16 by a retaining ring 5, and the guide rod 4 is supported by the sleeve-type linear ball bearing 3 (allowing relative sliding). When the transmission worm gear 7 drives the lower slider 2 to move relative to the upper slider 1, along... Figure 1 When the dial indicator opens or closes vertically, it is guided by the guide rod 4. The dial indicator 6 is mounted on the upper slider 1, and the measuring head of the dial indicator 6 passes through the upper slider 1 and rests on the upper surface of the lower slider 2 (e.g., Figure 4 As shown in the figure, dial indicator 6 can measure the distance that the lower slider 2 moves relative to the upper slider 1. This distance is equal to the distance between the rotation center O1 of the workpiece 11 and the rotation center O2 of the grinding machine spindle, i.e., the eccentricity of the grinding process. (See attached figure) Figure 5 A positioning rod 8 is installed on the surface of the upper slider 1 away from the three-jaw chuck 9. The positioning rod 8 is connected to the grinding machine spindle through the magnetic clamp 12. When the upper slider 1 and the lower slider 2 are fully closed, the rotation center O1 of the workpiece 11 being measured coincides with the rotation center O2 of the grinding machine spindle. At this time, the reading of the dial indicator 6 is set to zero.

[0025] Preferably, a baffle 10 is installed at the position where the transmission worm 7 extends out of the upper slider 1. When the transmission worm 7 is rotated, the baffle 10 can limit the stroke of the axial movement of the transmission worm 7.

[0026] Reference Appendix Figure 6 The chuck positioning block 13 is fixed and positioned at the chuck center hole 14 of the three-jaw chuck 9 by the positioning pin 15. The lower slide block 2 is then fixed to the chuck positioning block 13 by a threaded connection. Preferably, the positioning rod 8 is threaded to and fixed to the upper slide block 1 by the axial positioning block 17. A clearance groove 18 is provided on the lower slide block 2 at a position corresponding to the positioning rod 8 to facilitate clearance of the positioning rod 8 when the upper slide block 1 and the lower slide block 2 are fully closed.

[0027] The working process of this invention is as follows: During measurement, the workpiece 11 to be measured is clamped and positioned by the jaws of the three-jaw chuck 9. Then, the transmission worm gear 7 is rotated so that the upper slider 1 and the lower slider 2 are fully closed. At this time, the rotation center O1 of the workpiece 11 coincides with the rotation center O2 of the grinding machine spindle (positioning rod), that is, the eccentricity is 0. The dial indicator 6 is then set to zero. Then, the transmission worm gear 7 is gradually turned so that the upper slider 1 slides relative to the lower slider 2, as follows. Figure 5 As shown, the rotation center O1 of the workpiece 11 being measured is eccentric to the rotation center O2 of the positioning rod 8. At this time, the reading of the dial indicator 6 is the eccentricity, which can be used to measure or adjust the eccentricity.

[0028] It is understood that, for those skilled in the art, any equivalent substitutions or modifications to the technical solutions and inventive concepts of this invention should fall within the scope of protection of the appended claims.

Claims

1. A device for measuring and adjusting the eccentricity of grinding processes, characterized in that: The device includes an upper slider (1), a lower slider (2), a dial indicator (6), a transmission worm gear (7), and a three-jaw chuck (9). One side of the three-jaw chuck (9) holds and positions the workpiece (11) to be measured through jaws, and the other side of the three-jaw chuck (9) is fixed with a chuck positioning block (13). The lower slider (2) is fixed to the three-jaw chuck (9) through the chuck positioning block (13). The upper slider (1) is set above the lower slider (2). The transmission worm gear (7) is rotatably installed in the upper slider (1). One end of the transmission worm gear (7) extends out of the upper slider (1), and the other end of the transmission worm gear (7) is threaded to the lower slider (2). The lower slider (2) has a guide hole (16), and one end of the guide rod (4) is connected to the guide rod. The guide rod (4) is fixed inside the upper slider (1) and supported in the guide hole (16). When the transmission worm (7) drives the lower slider (2) to move relative to the upper slider (1), it is guided by the guide rod (4). The dial indicator (6) is installed on the upper slider (1) and the measuring head of the dial indicator (6) is on the surface of the lower slider (2) to measure the distance of the movement of the lower slider (2) relative to the upper slider (1). A positioning rod (8) is installed on the surface of the upper slider (1) away from the three-jaw chuck (9). The positioning rod (8) is connected to the grinding machine spindle through the magnetic clamp (12). When the upper slider (1) and the lower slider (2) are closed, the rotation center of the workpiece (11) being measured coincides with the rotation center of the grinding machine spindle.

2. The device for measuring and adjusting the eccentricity of grinding according to claim 1, characterized in that: A baffle (10) is installed at the position where the transmission worm (7) extends out of the upper slider (1). The baffle (10) is used to limit the stroke of the axial movement of the transmission worm (7).

3. The device for measuring and adjusting the eccentricity of grinding according to claim 2, characterized in that: The chuck positioning block (13) is fixed and positioned at the chuck center hole (14) of the three-jaw chuck (9) by the positioning pin (15).

4. The device for measuring and adjusting grinding eccentricity according to claim 3, characterized in that: The guide holes (16) are symmetrically opened on both sides of the lower slider (2). A sleeve-type linear ball bearing (3) is installed in the guide hole (16) through a snap ring (5). The guide rod (4) is supported by the sleeve-type linear ball bearing (3).

5. The device for measuring and adjusting the eccentricity of grinding according to claim 4, characterized in that: The positioning rod (8) is fixed on the upper slider (1) by the axial positioning block (17).

6. The device for measuring and adjusting the eccentricity of grinding according to claim 5, characterized in that: An clearance groove (18) is provided on the lower slider (2) at a position corresponding to the positioning rod (8).

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