Blade cylindrical surface grinding fixture and grinding machine for grinding blade cylindrical surface

Abstract

This invention provides a blade cylindrical surface grinding fixture and a dedicated grinding wheel for grinding blade cylindrical surfaces, belonging to the field of grinding technology. It solves the problems of insufficient grinding accuracy and low yield rate in existing blade cylindrical surface grinding methods. The pressing component of this invention includes an upper support body and a lower support body. The upper support body is fixedly connected to the piston rod of the hydraulic cylinder, and the upper and lower support bodies are connected by a horizontally arranged rotating shaft. The lower support body has a vertically arranged guide hole, and the pressing block has a guide post portion passing through the guide hole. The guide hole and the guide post portion are in clearance fit, and the top surface of the guide post portion and the lower support body are in spherical-plane contact. This invention improves the blade clamping accuracy by adjusting the pressing component of the blade cylindrical surface grinding fixture, and achieves grinding of the upper and lower cylindrical surfaces sequentially in a single clamping operation by adjusting the dedicated grinding wheel for grinding blade cylindrical surfaces, thus improving both machining accuracy and machining efficiency.

Description

Technical Field

[0001] This invention belongs to the field of grinding technology and relates to a grinding fixture, particularly a blade cylindrical surface grinding fixture.

[0002] This invention belongs to the field of grinding technology and relates to a grinding wheel grinding machine, particularly a grinding wheel grinding machine specifically for grinding cylindrical surfaces of blades. Background Technology

[0003] A rotary compressor (application number 201080008127.8) and a rotary compressor (application number 202380018936.4) described in Chinese patent documents both include blades, one end of which is a cylindrical part that mates with a groove.

[0004] Grinding wheel grinders are commonly used equipment for grinding various cutting tools and tools, and are also used for grinding, deburring, and cleaning small parts. There are many types of grinding wheel grinders, such as handheld, benchtop, and vertical types. Various specialized grinding wheel grinders have also been developed for different workpieces, such as the diamond tool head bottom surface grinding device (application number 201310246938.7) and a five-axis multi-wheel grinding mechanism (application number 202323651145.1) described in Chinese patent literature.

[0005] Existing diamond tool tips and other workpieces have relatively low grinding precision requirements. The clamping precision in diamond tool tip bottom surface grinding equipment is also low, resulting in low workpiece precision after grinding. Grinding the cylindrical surfaces on both sides of the blade requires two clamping operations. Even when using a general-purpose grinding machine with high grinding precision, the surface roughness Ra of the cylindrical surfaces on both sides of the blade is greater than 0.4 μm, the cylindrical head profile error is ±0.015 mm, and the product qualification rate is only about 90%, indicating a persistent problem of low product qualification rate.

[0006] The machining accuracy of blades directly affects the performance of compressors, especially the grinding accuracy of the cylindrical surfaces on both sides of the blades in oscillating blades. The higher the machining accuracy of the cylindrical surfaces on both sides of the blade, the better the sliding seal formed between the blade and the groove. Therefore, those skilled in the art hope to further improve the above parameters of the blades and increase the yield rate of the ground cylindrical surfaces of the blades. Summary of the Invention

[0007] This invention proposes a blade cylindrical surface grinding fixture. The technical problem to be solved by this invention is how to improve the blade clamping accuracy and thus improve the grinding accuracy of the blade cylindrical surface.

[0008] This invention also proposes a special grinding wheel grinding machine for grinding the cylindrical surface of blades. The technical problem to be solved by this invention is how to improve the grinding accuracy and product qualification rate of the cylindrical surface of blades, especially the surface roughness of the cylindrical surfaces on both sides of the blade and the profile error of the cylindrical head.

[0009] The technical problem to be solved by the present invention can be achieved by the following technical solution: a blade cylindrical surface grinding fixture, comprising a fixture base, a pressing component, and a side pressing component; the fixture base has a workpiece bearing part for horizontal placement of the blade, a rear support part for contact of the rear end face of the blade, and a side support part for contact of a small side face of the blade; the pressing component includes a hydraulic cylinder and a pressing block located above the workpiece bearing part, the bottom surface of the pressing block being a plane, and the pressing component is used to apply downward pressure to the blade; the side pressing component includes a driving component and a side push rod, and the side pressing component is used to apply a horizontal thrust to the blade so that the blade contacts the side support part; characterized in that the pressing component further includes an upper support body and a lower support body, the upper support body being fixedly connected to the piston rod of the hydraulic cylinder, and the upper support body and the lower support body being connected by a horizontally arranged rotating shaft; the lower support body has a vertically arranged guide hole, the pressing block having a guide post part passing through the guide hole, the guide hole and the guide post part being clearance fit, and the top surface of the guide post part and the lower support body being in spherical and planar contact.

[0010] Before clamping, the large flat surface, small side surface, and rear end face of the blade are all ground with high precision to improve the clamping accuracy of the blade. When clamping the blade using a grinding fixture, the blade is first placed horizontally on the workpiece bearing part, that is, the large flat surface of the blade at the bottom contacts the workpiece bearing part; the blade is moved so that the rear end face of the blade contacts and fits against the rear support part, and a small side surface of the blade contacts the side support part; then the drive of the side pressure assembly is operated, and the side push rod acts on the other small side surface of the blade, so that the small side surface of the blade fits against the side support part; finally, the cylinder of the pressing assembly is operated, and the piston rod extends so that the pressing block contacts the large flat surface of the blade at the top, and applies an appropriate amount of pressing force to the blade. During this process, with the large plane at the top of the blade as a reference, the lower support body can swing slightly around the axis of rotation, and the guide column can also swing slightly relative to the lower support body. This significantly improves the fit between the bottom surface of the lower pressure block and the large plane at the top of the blade, improves the uniformity of the blade's force, prevents the blade from being excessively deformed by pressure, and prevents the blade's position from changing. This improves the blade's clamping accuracy and, consequently, improves the grinding accuracy of the blade's cylindrical surface.

[0011] The top surface of the guide column and the lower support body have a spherical and a planar contact, which not only improves the flexibility of the guide column relative to the lower support body in slight swinging, but also ensures that the downward force of the lower support body is efficiently transmitted to the lower pressure block, and improves the consistency of the force applied by the lower pressure block to the blade.

[0012] In the aforementioned blade cylindrical surface grinding fixture, the clearance is 0.1 mm to 0.2 mm.

[0013] In the aforementioned blade cylindrical surface grinding fixture, one or more pressure blocks are mounted on the lower support body.

[0014] In the aforementioned blade cylindrical surface grinding fixture, the lower support body has a clearance space, and the top of the guide post is located within the clearance space. The top surface of the guide post and the top surface of the clearance space are in spherical-planar contact. This structure not only provides sufficient space for the lower pressure block to swing, but also significantly reduces the possibility of the lower pressure block and the lower support body getting stuck. At the same time, the clearance space makes it easier to inject lubricating grease into the guide hole.

[0015] In the aforementioned blade cylindrical surface grinding fixture, the top surface of the guide post is provided with a positioning groove, and the steel ball is placed in the positioning groove. The top surface of the clearance space in the lower support body is a plane for the steel ball to contact; or the top of the guide post is hemispherical, and the top surface of the clearance space in the lower support body is a plane for the steel ball to contact; or the top surface of the clearance space in the lower support body has a hemispherical protrusion, and the top of the guide post is a plane.

[0016] In the aforementioned blade cylindrical surface grinding fixture, a slot is provided on the guide post, and a retaining spring is provided at the slot to contact the bottom surface of the clearance space.

[0017] A special grinding wheel machine for grinding the cylindrical surface of blades includes a base, a column, a fixture mounting base, and a grinding wheel mounting base. The base and column are connected by a Y-axis guide drive assembly with a motor and a horizontally arranged linear slide rail. The fixture mounting base and column are connected by a Z-axis guide drive assembly with a motor and a vertically arranged linear slide rail. The base and grinding wheel mounting base are connected by an X-axis guide drive assembly with a motor and a horizontally arranged linear slide rail. A grinding wheel grinding assembly with a motor, a spindle, and a grinding wheel is mounted on the grinding wheel mounting base. The spindle is parallel to the linear slide rail of the X-axis guide drive assembly. The grinding wheel machine for grinding the cylindrical surface of blades further includes the aforementioned blade cylindrical surface grinding fixture. In the cutting fixture, both the fixture base and the cylinder body of the hydraulic cylinder are fixedly connected to the fixture mounting base. The axis of the cylindrical part of the blade held by the blade cylindrical surface grinding fixture is set parallel to the linear slide rail of the Y-axis guide drive assembly. The outer side of the grinding wheel has a wheel surface that matches the shape of the cylindrical part of the blade. By operating the X-axis guide drive assembly, Y-axis guide drive assembly, and Z-axis guide drive assembly, the wheel surface of the grinding wheel can grind not only the upper cylindrical surface of the cylindrical part of the blade, but also the lower cylindrical surface of the cylindrical part of the blade. A diamond roller is rotatably connected to the fixture mounting base. By operating the X-axis guide drive assembly, Y-axis guide drive assembly, and Z-axis guide drive assembly, the grinding wheel can also contact the diamond roller and be used to correct the wheel surface of the grinding wheel.

[0018] When machining blades using a grinding wheel, the blades are clamped in a blade cylindrical surface grinding fixture. Before grinding, a diamond roller contacts and moves with the rotating grinding wheel to correct the wheel's surface shape, improving grinding accuracy. By controlling the X-axis, Y-axis, and Z-axis guide drive components, the grinding wheel grinds both the upper and lower cylindrical surfaces of the blade in any order, achieving grinding of both cylindrical surfaces in a single clamping operation. This reduces the number of clamping operations, improves grinding accuracy, increases product yield, and reduces the grinding time required.

[0019] In the aforementioned grinding machine for grinding cylindrical surfaces of blades, the diamond roller is thicker on the inside and thinner on the outside, with a rounded cutting edge on the outer side; the axis of the diamond roller is inclined relative to the axis of the grinding wheel.

[0020] In the above-mentioned grinding machine for grinding cylindrical surfaces of blades, the grinding machine for grinding cylindrical surfaces of blades also includes a guide cylinder and a push plate. The cylinder body of the guide cylinder is fixed on the grinding wheel mounting seat, and the push plate is fixedly connected to the piston rod of the guide cylinder. The piston rod of the guide cylinder extends to enable the push plate to push the blade against the rear support.

[0021] Compared with existing technologies, this blade cylindrical surface grinding fixture improves blade clamping accuracy and significantly reduces the possibility of blade damage due to clamping, thereby improving the grinding accuracy of blade cylindrical surfaces and increasing the blade grinding pass rate.

[0022] This specialized grinding machine for grinding the cylindrical surfaces of blades improves blade clamping accuracy through improved fixtures, corrects the grinding wheel surface using diamond rollers, and grinds the upper and lower cylindrical surfaces sequentially in a single clamping process. This improves the grinding accuracy of the blade's cylindrical surface, reducing the cylindrical head profile error from ±0.015mm to ±0.005mm, the surface roughness from Ra>0.4μm to Ra≤0.2μm, and increasing the product qualification rate from approximately 90% to approximately 99%. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a grinding machine specifically designed for grinding cylindrical surfaces of blades.

[0024] Figure 2 yes Figure 1 Enlarged view of a local structure.

[0025] Figure 3 This is a schematic diagram showing the structure of the grinding wheel surface in contact with the diamond roller.

[0026] Figure 4 This is a three-dimensional structural diagram of a blade cylindrical surface grinding fixture.

[0027] Figure 5This is a schematic diagram of the main structure of a blade cylindrical surface grinding fixture.

[0028] Figure 6 yes Figure 5 A schematic diagram of the cross-sectional structure of AA.

[0029] In the diagram, 1. Machine base; 2. Column; 3. Fixture mounting base; 4. Grinding wheel mounting base; 5. Y-axis guide drive assembly; 6. Z-axis guide drive assembly; 7. X-axis guide drive assembly; 8. Diamond roller; 8a. Arc correction cutting edge; 10. Grinding wheel grinding assembly; 11. Spindle; 12. Grinding wheel; 12a. Wheel surface; 20. Blade cylindrical surface grinding fixture; 21. Fixture base; 21a. Workpiece bearing part; 21b. Rear support part; 21c. 1. Side support; 22. Hydraulic cylinder; 23. Lower pressure block; 23a. Guide column; 23b. Positioning groove; 24. Driving component; 25. Side push rod; 26. Upper support body; 27. Lower support body; 27a. Guide hole; 27b. Clearance space; 28. Rotating shaft; 29. ​​Steel ball; 30. Snap ring; 40. Guide cylinder; 50. Flat push plate; 60. Blade; 60a. Cylindrical part; 60a1. Upper cylindrical surface; 60a2. Lower cylindrical surface. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] like Figure 1 As shown, a special grinding wheel grinding machine for grinding the cylindrical surface of blades includes a base 1, a column 2, a fixture mounting base 3, a grinding wheel mounting base 4, a blade cylindrical surface grinding fixture 20, a diamond roller 8, and a grinding wheel assembly 10.

[0036] The base 1 and the column 2 are connected by a Y-axis guide drive assembly 5, which has a motor and a horizontally arranged linear slide rail. The fixture mounting base 3 and the column 2 are connected by a Z-axis guide drive assembly 6, which has a motor and a vertically arranged linear slide rail. The blade cylindrical surface grinding fixture 20 is mounted on the fixture mounting base 3. That is, operating the motor in the Y-axis guide drive assembly 5 can move the workpiece clamped on the blade cylindrical surface grinding fixture 20 horizontally back and forth, and operating the motor in the Z-axis guide drive assembly 6 can move the workpiece up and down. The base 1 and the grinding wheel mounting base 4 are connected by an X-axis guide drive assembly 7, which has a motor and a horizontally arranged linear slide rail. The grinding wheel grinding assembly 10 is mounted on the grinding wheel mounting base 4. The grinding wheel grinding assembly 10 includes a spindle 11, a motor, and a grinding wheel 12. The spindle 11 is arranged parallel to the linear slide rail of the X-axis guide drive assembly 7. The outer side of the grinding wheel 12 has a wheel surface 12a that is adapted to the shape of the cylindrical part 60a region of the blade 60. The motor in the Y-axis guide drive assembly 5 can move the grinding wheel 12 horizontally left and right. In general, the motors in the X-axis guide drive assembly 7, the Y-axis guide drive assembly 5, and the Z-axis guide drive assembly 6 can not only grind the upper cylindrical surface 60a1 of the cylindrical portion 60a in the blade 60 using the wheel surface 12a of the grinding wheel 12, but also grind the lower cylindrical surface 60a2 of the cylindrical portion 60a in the blade 60.

[0037] like Figure 1 and Figure 3 As shown, the diamond roller 8 is used to correct the wheel surface 12a of the grinding wheel 12. The diamond roller 8 is thicker on the inside and thinner on the outside, with an arc-shaped correction cutting edge 8a on the outside. The diamond roller 8 is rotatably connected to the fixture mounting base 3 via a shaft, and the axis of the diamond roller 8 is inclined relative to the axis of the grinding wheel 12. Controlling the motor in the X-axis guide drive assembly 7, the motor in the Y-axis guide drive assembly 5, and the motor in the Z-axis guide drive assembly 6 can also make the grinding wheel 12 contact the diamond roller 8 and generate axial movement. During the correction of the wheel surface 12a of the grinding wheel 12, the grinding wheel grinding assembly 10 is simultaneously controlled to rotate the grinding wheel 12, which in turn drives the diamond roller 8 to rotate, improving the correction accuracy of the wheel surface 12a of the grinding wheel 12 and extending the service life of the grinding wheel 12 and the diamond roller 8.

[0038] like Figure 1 , Figures 4 to 6 As shown, the blade cylindrical surface grinding fixture 20 includes a fixture base 21, a pressing assembly, and a side pressing assembly. The fixture base 21 is fixedly connected to the fixture mounting base 3. The pressing assembly includes a hydraulic cylinder 22 and a pressing block 23. The cylinder body of the hydraulic cylinder 22 is also fixedly connected to the fixture mounting base 3. The axis of the cylindrical portion 60a of the blade 60 held by the blade cylindrical surface grinding fixture 20 is parallel to the linear slide rail of the Y-axis guide drive assembly 5.

[0039] The fixture base 21 has a workpiece support 21a for horizontal placement of blades 60, a rear support 21b for contact with the rear end face of blades 60, and a side support 21c for contact with a small side of blades 60. The accompanying drawings show that four blades 60 can be placed simultaneously on the workpiece support 21a. The length of the workpiece support 21a can be schematically adjusted according to actual conditions, thereby increasing or decreasing the number of blades 60 placed simultaneously. In short, the special grinding wheel grinding machine for grinding the cylindrical surface of blades can process multiple blades 60 simultaneously, significantly improving the processing efficiency of blades 60. The accompanying drawings show that the side support 21c is located in the middle of the workpiece support 21a, and there are two sets of side pressure components, respectively located on the front and rear sides of the workpiece support 21a. According to actual conditions, not only can the position of the side support 21c be adjusted, such as if the side support 21c is located in one end area of ​​the workpiece support 21a, but the number of side pressure components can also be adjusted to one set.

[0040] The side pressure assembly includes a drive member 24 and a side push rod 25. The side pressure assembly is used to apply a horizontal thrust to the blade 60 so that the blade 60 contacts the side abutment 21c. The drive member 24 is a cylinder or a solenoid valve and is mounted on the clamp base 21.

[0041] The pressing assembly is located above the workpiece bearing portion 21a and is used to apply downward pressure to the blade 60. The bottom surface of the pressing block 23 is flat. To reduce the contact area between the pressing block 23, the workpiece bearing portion 21a, and the blade 60, grooves are provided on the bottom surface of the pressing block 23 and the workpiece bearing portion 21a. The number of pressing blocks 23 corresponds to the number of blades 60 that can be clamped; that is, the attached drawings show that there are 4 sets of pressing blocks 23.

[0042] The pressing assembly also includes an upper support body 26 and a lower support body 27. The upper support body 26 is fixedly connected to the piston rod of the hydraulic cylinder 22. The upper support body 26 and the lower support body 27 are connected by a horizontally arranged rotating shaft 28. The axis of the rotating shaft 28 is parallel to the linear slide rail of the X-axis guide drive assembly 7, that is, the lower support body 27 can swing back and forth slightly relative to the upper support body 26.

[0043] The lower support body 27 has a vertically oriented guide hole 27a. The lower pressure block 23 has a guide post 23a that passes through the guide hole 27a. The guide hole 27a and the guide post 23a are in clearance fit, with a clearance of 0.1mm to 0.2mm. The top surface of the guide post 23a and the lower support body 27 are in spherical-plane contact. The accompanying drawings show that the lower support body 27 has a clearance space 27b. The top of the guide post 23a is located within the clearance space 27b. The top surface of the guide post 23a has a positioning groove 23b, and the steel ball 29 is placed in the positioning groove 23b. The top surface of the clearance space 27b in the lower support body 27 is a plane for the steel ball 29 to contact. Depending on the actual situation, the spherical and planar contact structure can be adjusted so that the top of the guide column 23a is hemispherical and the top surface of the clearance space 27b in the lower support 27 is a planar surface for the steel ball 29 to contact; or the top surface of the clearance space 27b in the lower support 27 has a hemispherical protrusion and the top of the guide column 23a is a planar surface.

[0044] A slot is provided on the guide column 23a, and a retaining spring 30 is provided at the slot to contact the bottom surface of the clearance space 27b. This structure prevents the lower pressure block 23 from falling and the steel ball 29 from rolling off, thereby improving the stability of the fixture.

[0045] The accompanying drawings in the instruction manual show that there are two hydraulic cylinders 22, two upper support bodies 26, and two lower support bodies 27. These are arranged in a one-to-one correspondence, with two pressing blocks 23 mounted on each lower support body 27. The number of lower hydraulic cylinders 22, two upper support bodies 26, and two lower support bodies 27 can be adjusted according to actual needs. For example, the hydraulic cylinders 22, two upper support bodies 26, two lower support bodies 27, and pressing blocks 23 can all be arranged in a one-to-one correspondence, or more pressing blocks 23 can be mounted on a single lower support body 27.

[0046] like Figure 2As shown, the special grinding wheel grinding machine for grinding the cylindrical surface of blades also includes a guide cylinder 40 and a flat push plate 50. The cylinder body of the guide cylinder 40 is fixed on the grinding wheel mounting seat 4, and the flat push plate 50 is fixedly connected to the piston rod of the guide cylinder 40. When the piston rod of the guide cylinder 40 extends, the flat push plate 50 can push the blade 60 against the rear support part 21b, improving the clamping accuracy of the blade 60.

Claims

1. A blade cylindrical surface grinding fixture, comprising a fixture base (21), a pressing assembly, and a side pressing assembly; the fixture base (21) has a workpiece bearing portion (21a) for horizontal placement of the blade (60), a rear support portion (21b) for contact with the rear end face of the blade (60), and a side support portion (21c) for contact with a small side surface of the blade (60); the pressing assembly includes a hydraulic cylinder (22) and a pressing block (23) located above the workpiece bearing portion (21a), the bottom surface of the pressing block (23) being a plane, and the pressing assembly is used to apply downward pressure to the blade (60); the side pressing assembly includes a driving member (24) and a side push rod (25), and the side pressing assembly is used to apply a horizontal thrust to the blade (60) so that the blade (60) contacts the side support portion (21c); characterized in that, The pressing assembly also includes an upper support body (26) and a lower support body (27). The upper support body (26) is fixedly connected to the piston rod of the oil cylinder (22). The upper support body (26) and the lower support body (27) are connected by a horizontally arranged rotating shaft (28). The lower support body (27) has a vertically arranged guide hole (27a). The pressing block (23) has a guide post (23a) that passes through the guide hole (27a). The guide hole (27a) and the guide post (23a) are in clearance fit. The top surface of the guide post (23a) and the lower support body (27) are in spherical and planar contact.

2. The blade cylindrical surface grinding fixture according to claim 1, characterized in that, The gap is 0.1 mm to 0.2 mm.

3. The blade cylindrical surface grinding fixture according to claim 1, characterized in that, One or more pressure blocks (23) are installed on the lower support (27).

4. The blade cylindrical surface grinding fixture according to claim 1, 2, or 3, characterized in that, The lower support (27) has a clearance space (27b), the top of the guide column (23a) is located in the clearance space (27b), and the top surface of the guide column (23a) and the top surface of the clearance space (27b) are in spherical and planar contact.

5. The blade cylindrical surface grinding fixture according to claim 4, characterized in that, The top surface of the guide column (23a) is provided with a positioning groove (23b), and the steel ball (29) is placed in the positioning groove (23b). The top surface of the clearance space (27b) in the lower support body (27) is a plane for the steel ball (29) to contact. The top of the guide column (23a) is hemispherical, and the top surface of the clearance space (27b) in the lower support (27) is a plane for the steel ball (29) to contact. The lower support (27) has a hemispherical protrusion on the top surface of the clearance space (27b), and the top of the guide column (23a) is flat.

6. The blade cylindrical surface grinding fixture according to claim 4, characterized in that, A slot is provided on the guide post (23a), and a retaining spring (30) is provided at the slot to contact the bottom surface of the clearance space (27b).

7. A grinding wheel grinding machine for grinding cylindrical surfaces of blades, comprising a machine base (1), a column (2), a fixture mounting base (3), and a grinding wheel mounting base (4), wherein the machine base (1) and the column (2) are connected by a Y-axis guide drive assembly (5) having a motor and a horizontally arranged linear slide rail, the fixture mounting base (3) and the column (2) are connected by a Z-axis guide drive assembly (6) having a motor and a vertically arranged linear slide rail, and the machine base (1) and the grinding wheel mounting base (4) are connected by an X-axis guide drive assembly (7) having a motor and a horizontally arranged linear slide rail; a grinding wheel grinding assembly (10) having a motor, a spindle (11), and a grinding wheel (12) is mounted on the grinding wheel mounting base (4), and the spindle (11) is arranged parallel to the linear slide rail of the X-axis guide drive assembly (7); characterized in that, The grinding machine for grinding the cylindrical surface of blades also includes the blade cylindrical surface grinding fixture (20) as described in any one of claims 1 to 6; the fixture base (21) and the cylinder body of the oil cylinder (22) in the blade cylindrical surface grinding fixture (20) are fixedly connected to the fixture mounting seat (3); the axis of the cylindrical part (60a) of the blade (60) held by the blade cylindrical surface grinding fixture (20) is arranged parallel to the linear slide rail of the Y-axis guide drive assembly (5); The outer side of the grinding wheel (12) has a wheel surface (12a) that matches the shape of the cylindrical part (60a) region of the blade (60). By manipulating the X-axis guide drive assembly (7), the Y-axis guide drive assembly (5) and the Z-axis guide drive assembly (6), the wheel surface (12a) of the grinding wheel (12) can grind the upper cylindrical surface (60a1) of the cylindrical part (60a) in the blade (60), and the wheel surface (12a) of the grinding wheel (12) can also grind the lower cylindrical surface (60a2) of the cylindrical part (60a) in the blade (60). A diamond roller (8) is rotatably connected to the fixture mounting base (3). The X-axis guide drive assembly (7), Y-axis guide drive assembly (5) and Z-axis guide drive assembly (6) can also make the grinding wheel (12) contact the diamond roller (8) and be used to correct the wheel surface (12a) of the grinding wheel (12).

8. The grinding machine for grinding cylindrical surfaces of blades according to claim 7, characterized in that, The diamond roller (8) is thicker on the inside and thinner on the outside, and the outer side is a rounded correction cutting edge (8a); the axis of the diamond roller (8) is inclined relative to the axis of the grinding wheel (12).

9. The grinding machine for grinding cylindrical surfaces of blades according to claim 7 or 8, characterized in that, The grinding machine for grinding the cylindrical surface of blades also includes a guide cylinder (40) and a flat push plate (50). The cylinder body of the guide cylinder (40) is fixed on the grinding wheel mounting seat (4), and the flat push plate (50) is fixedly connected to the piston rod of the guide cylinder (40). The piston rod of the guide cylinder (40) extends so that the flat push plate (50) pushes the blade (60) against the rear support part (21b).

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