A grinding device for machining a generator cylinder head

Abstract

The present invention relates to the technical field of cylinder head grinding, and discloses a grinding device for processing a generator cylinder head, comprising an external drive motor and a rotating shaft arranged at the output end of the external drive motor. The rotating shaft is provided with a grinding annular belt for grinding the generator cylinder head, the grinding annular belt being bent into a C-shape and coaxially arranged with the rotating shaft, and the rotating shaft is coaxially fixed with two end expansion rings through a bracket assembly. The present invention adopts a structure in which an outer semi-ring arc plate rotates on a C-shaped ring via a rotating support semi-ring arranged in a rotating groove, wherein the outer semi-ring arc plate is reset and rotated on the C-shaped ring by a reset spring and a rotating support semi-ring. In the initialization state, the outer semi-ring arc plate is vertically arranged, and multiple outer semi-ring arc plates cooperate with the inner notched ring to form a ring. Therefore, when the outer semi-ring arc plate rotates and opens on the outer wall of the C-shaped ring through the supporting semi-ring, the end expansion rings originally as a whole will be in an expanded state.

Description

Technical Field

[0001] The invention relates to the technical field of cylinder head grinding, and in particular to a grinding device for machining a generator cylinder head. Background Art

[0002] During the machining of the generator cylinder head, a grinding device is required to grind the generator cylinder head. The following problems are usually encountered during the grinding of the generator cylinder head surface:

[0003] First, there are some cylindrical grooves in the generator cylinder head, which requires grinding the side walls of these cylindrical grooves. However, conventional grinding devices grind only on the surface of the generator cylinder head, which makes it difficult to reach into the corresponding cylindrical grooves. Therefore, secondary grinding is required, that is, the surface of the generator cylinder head is initially ground, and then the side walls of the cylindrical grooves in the generator cylinder head are ground again. However, for grinding the side walls of the cylindrical grooves, the circular grinding disc in the prior art cannot change the abrasive particle size of the side walls, and this grinding method usually involves multiple switching of the grinding device, resulting in low grinding efficiency.

[0004] Secondly, the existing grinding is not completed in one go. It requires the use of multiple grinding devices with different abrasive grain sizes to grind the generator cylinder head surface and the inner wall of the cylindrical groove multiple times. This requires constant replacement of grinding tools. At the same time, the degree of contact between the corresponding grinding tools and the inner wall of the cylindrical groove also needs to be adjusted accordingly. That is, when using a low-mesh grinding tool for grinding, the degree of contact between the grinding tool and the inner wall of the cylindrical groove should be slightly smaller than the degree of contact between the grinding tool and the inner wall of the cylindrical groove of a high-mesh grinding tool. In this way, it can be ensured that in the process of changing from a low-mesh grinding tool to a high-mesh grinding tool, the grinding tool always presses against the inner wall of the cylindrical groove, so that the grinding of the inner wall of the cylindrical groove can proceed smoothly.

[0005] Therefore, we designed a grinding device for generator cylinder head processing. Summary of the Invention

[0006] The purpose of the present invention is to solve the problem of using grinding devices with different abrasive particle sizes to grind the generator cylinder head surface and the inner wall of the cylindrical groove multiple times, thereby requiring continuous replacement of grinding tools, and to propose a grinding device for generator cylinder head processing.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A grinding device for machining a generator cylinder head comprises an external drive motor and a rotating shaft disposed at the output end of the external drive motor. The rotating shaft is provided with an annular grinding belt for grinding the generator cylinder head. The annular grinding belt is bent into a C-shape and is coaxially arranged with the rotating shaft. The rotating shaft is coaxially fixed with two end expansion rings through a bracket assembly. The C-shaped grinding belt is passed through the two end expansion rings.

[0009] The grinding annular belt comprises a first grinding belt, a second grinding belt and a third grinding belt which are connected end to end in sequence. The bracket assembly is provided with a limiting clamping assembly for displacing and positioning the grinding annular belt.

[0010] Preferably, the first grinding belt, the second grinding belt and the third grinding belt are grinding belts with successively increasing abrasive grain sizes, and the grinding annular belts are wound around the outer side wall of the end expansion ring.

[0011] Preferably, the bracket assembly comprises:

[0012] Two end plates, the end plates are fixed coaxially with the rotating shaft, and the end expansion rings are connected to the end plates through a connecting frame;

[0013] A brush disc is slidably mounted on the rotating shaft, and the brush disc is provided with bristles that abut against the polishing annular belt. An electric push rod for driving the brush disc to rise and fall is arranged on one end disc.

[0014] Preferably, the end expansion ring comprises:

[0015] Arc-shaped end block and C-shaped ring, the C-shaped ring is disassembled and installed on both sides of the arc-shaped end block, and the bottom of the C-shaped ring is flush with the bottom of the arc-shaped end block;

[0016] The inner notch ring and the outer half ring arc plate, the inner notch ring is fixed on the C-shaped ring, and the two ends of the inner notch ring are fixed on the two ends of the arc end block, and the outer half ring arc plate is set in multiple positions, and is equidistant around the circumference and rotatably set on the C-shaped ring.

[0017] Preferably, a plurality of rotation grooves are provided on the inner notch ring, and the plurality of rotation grooves are equidistantly arranged around the circumference, and the outer semi-ring arc plate rotates on the C-shaped ring through a rotation support semi-ring arranged in the rotation groove.

[0018] Preferably, a lifting arc hole is opened on the arc-shaped end block, and an annular plate slides in the lifting arc hole. A pushing annular plate is provided on the side of the annular plate facing the outer semi-annular arc plate to push the outer semi-annular arc plate to flip.

[0019] Preferably, a connecting tube is provided between the two end expansion rings, and the connecting tube is installed on the top of the arc-shaped end block through a mounting groove, a through hole connected to the lifting arc hole is provided on the mounting groove, a rotating rod driven by an external driving device is coaxially provided in the connecting tube, a first threaded hole is provided on the annular plate, and a spiral block is provided at one end of the rotating rod, which extends into the lifting arc hole and is adapted to the first threaded hole on the annular plate.

[0020] Preferably, the position limiting clamping assembly includes:

[0021] The first clamping plate and the second clamping plate, the first clamping plate is arranged at the opposite ends of the C-shaped grinding annular belt, the second clamping plate is arranged in two and symmetrically arranged on both sides of the first clamping plate, the second clamping plate moves on the first clamping plate through the driving member and clamps the grinding annular belt.

[0022] Preferably, the position limiting clamping assembly further comprises:

[0023] A rotating screw and a lifting plate are provided, wherein a second threaded hole is provided on the lifting plate, the rotating screw is connected to the lifting plate through the second threaded hole, and the lifting plate is connected to the first clamping plate;

[0024] The driving motor is used to drive the screw rod to rotate forward and reverse to drive the first clamping plate to move up and down.

[0025] Preferably, the driving member is a hydraulic rod, the output end of the hydraulic rod is connected to the second clamping plate, and drives the second clamping plate to move toward the first clamping plate, and the grinding annular belt is located between the second clamping plate and the first clamping plate.

[0026] The beneficial effects of the present invention are:

[0027] The present invention adopts a structure in which the outer semi-ring arc plate rotates on the C-shaped ring through a rotating support semi-ring set in a rotating groove, wherein the outer semi-ring arc plate resets and rotates on the C-shaped ring through a reset spring and a rotating support semi-ring. In the initialization state, the outer semi-ring arc plate is vertically arranged, and multiple outer semi-ring arc plates cooperate with the inner notched ring to form a ring. Therefore, during the process of the outer semi-ring arc plate rotating and opening on the outer side wall of the C-shaped ring through the supporting semi-ring, the end expansion ring originally as a whole will be in an expanded state.

[0028] The present invention turns on the external driving device, allowing the external driving device to rotate the spiral block on the rotating rod, thereby driving the annular plate to lift. During the lifting process of the annular plate, it will also lift the pushing ring plate and push the outer semi-annular arc plate to flip, and its flipping direction is outward, ultimately achieving the outer diameter of the polished annular belt slightly increased compared to before. At this time, the mesh number of the second polishing belt is increased, and the outer diameter of the polishing annular belt is slightly increased, so it will fit more closely to the inner wall of the cylindrical groove on the surface of the generator cylinder head, allowing the second polishing belt with multiple meshes to continue to polish the inner wall of the cylindrical groove for the second time, and then repeat the above operation, allowing the third polishing belt to once again cling to the inner wall of the cylindrical groove for three times of polishing. In this process, the outer diameter of the polishing annular belt will be enlarged three times in sequence after the initial polishing, secondary polishing and tertiary polishing, so that the subsequent polishing can better fit the polishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of a grinding device for machining a generator cylinder head proposed by the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure at center A;

[0031] Figure 3 This is a schematic structural diagram of a grinding annular belt in a grinding device for machining a generator cylinder head proposed by the present invention;

[0032] Figure 4 This is a schematic structural diagram of an end expansion ring in a grinding device for machining a generator cylinder head proposed by the present invention;

[0033] Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0034] Figure 6 for Figure 4 A magnified schematic diagram of the structure at C in the middle;

[0035] Figure 7 This is a partial exploded view of an end expansion ring in a grinding device for machining a generator cylinder head proposed by the present invention;

[0036] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at D in the middle.

[0037] In the figure: 1, rotating shaft; 2, end plate;

[0038] 3. Grinding annular belt; 31. First grinding belt; 32. Second grinding belt; 33. Third grinding belt;

[0039] 4. End expansion ring; 41. Arc-shaped end block; 42. Inner notch ring; 43. Outer half ring arc plate; 44. Rotation groove; 45. Rotation support half ring; 46. C-shaped ring;

[0040] 5. Connecting cylinder; 6. Rotating screw; 7. Brush plate; 8. Electric push rod; 9. Connecting frame; 10. Driving motor; 11. Lifting plate; 12. First clamping plate; 13. Driving member; 14. Second clamping plate; 15. Rotating rod; 16. Screw block; 17. Mounting slot; 18. Lifting arc hole; 19. Ring plate; 20. Pushing ring plate. DETAILED DESCRIPTION

[0041] Reference Figures 1-8 A grinding device for processing a generator cylinder head includes an external drive motor and a rotating shaft 1 arranged at the output end of the external drive motor. Therefore, when the external drive motor is started, the rotating shaft 1 will rotate together. Since a grinding annular belt 3 for grinding the generator cylinder head is provided on the outer sleeve of the rotating shaft 1, the grinding annular belt 3 can be rotated together and can play a role in grinding the surface of the generator cylinder head.

[0042] Reference Figure 1 In this state, the rotating shaft 1 rotates with the grinding annular belt 3, so that the annular area where the grinding annular belt 3 contacts the surface of the generator cylinder head can be polished. Therefore, it is necessary to continuously move the external drive motor to move the rotating shaft 1 on the surface of the generator cylinder head.

[0043] Reference Figure 1 and Figure 3 State, the grinding annular belt 3 is bent into a C shape and is coaxially arranged with the rotating shaft 1. The rotating shaft 1 is coaxially fixed with two end expansion rings 4 through a bracket assembly. The grinding annular belt 3 arranged in a C shape is passed through the two end expansion rings 4. The two end expansion rings 4 are coaxially arranged up and down, wherein the grinding annular belt 3 is passed through the two end expansion rings 4 to provide support for the vertical setting of the grinding annular belt 3 arranged in a C shape. Therefore, the grinding annular belt 3 covered by the outer wall of the end expansion ring 4 close to the surface of the generator cylinder head is the area used for grinding.

[0044] Reference Figure 3 State, the grinding annular belt 3 includes a first grinding belt 31, a second grinding belt 32 and a third grinding belt 33 which are connected end to end in sequence, wherein the mesh size of the abrasive particles on the first grinding belt 31, the second grinding belt 32 and the third grinding belt 33 increases successively, so the grinding annular belt 3 will grind the surface of the generator cylinder head multiple times, so that the surface of the motor cylinder head forms a state with different surface roughness.

[0045] The bracket assembly is provided with a limit clamping assembly for displacing and positioning the polishing annular belt 3, wherein the limit clamping assembly is used to drive the polishing annular belt 3 to slide on the end expansion rings 4 arranged above and below. The limit clamping assembly is an existing technology, which drives the displacement and positioning of the polishing annular belt 3 and will not be elaborated on here.

[0046] Reference Figure 1 As shown, the bracket assembly includes two end plates 2, which are coaxially fixed to the rotating shaft 1, and the end expansion ring 4 is connected to the end plate 2 through a connecting frame 9, thereby providing stable support for the setting of the end expansion ring 4. At the same time, when the rotating shaft 1 rotates, it can also rotate with the end expansion ring 4, and finally rotate with the grinding annular belt 3 on the end expansion ring 4.

[0047] A brush disc 7 is provided on the rotating shaft 1 and slides along the axis, and the brush disc 7 is provided with bristles that are against the polishing annular belt 3. One of the end discs 2 is provided with an electric push rod 8 that drives the brush disc 7 to rise and fall. Therefore, in the process of the polishing annular belt 3 completing the repositioning, part of the debris generated by the polishing annular belt 3 will be attached to the polishing annular belt 3. As the polishing annular belt 3 shifts, the side with the debris faces the rotating shaft 1. Therefore, the electric push rod 8 is turned on to drive the brush disc 7 to rise and fall, so that the bristles on the outer wall of the brush disc 7 are against the polishing annular belt 3. In the process of the brush disc 7 rising and falling, the bristles will clean and remove the attached debris, which is convenient for subsequent continuous polishing.

[0048] Therefore, originally located Figure 2 In the process, the first grinding belt 31 wrapped around the surface of the end expansion ring 4 close to the surface of the generator cylinder head is pulled and shifted, and moves out of the surface of the end expansion ring 4 close to the surface of the generator cylinder head. When the second grinding belt 32 moves to the surface of the end expansion ring 4 close to the surface of the generator cylinder head, the driving limit clamping assembly is stopped, thereby completing the switching and replacement of the grinding belts with different abrasive grits in the grinding area.

[0049] Among them, the first grinding belt 31, the second grinding belt 32 and the third grinding belt 33 are grinding belts with increasing abrasive particle size. The grinding annular belt 3 is wrapped around the outer wall of the end expansion ring 4. Therefore, when the first grinding belt 31 or the second grinding belt 32 or the third grinding belt 33 moves to the surface of the end expansion ring 4 close to the surface of the generator cylinder head, the corresponding grinding roughness will be changed, and finally the change of the grinding roughness is completed without stopping the grinding, thereby improving the grinding adaptability and grinding diversity.

[0050] Reference Figure 4-Figure 8State, the end expansion ring 4 includes an arc-shaped end block 41 and a C-shaped ring 46. The C-ring 46 is disassembled and installed on both sides of the arc-shaped end block 41, and the bottom of the C-shaped ring 46 is flush with the bottom of the arc-shaped end block 41. This arrangement ensures that the surface where the arc-shaped end block 41 and the bottom of the C-ring 46 are located is a plane. In this way, when the rotating shaft 1 rotates, the end expansion ring 4 is rotated with the grinding annular belt 3, and the area connected with the grinding annular belt 3 is the arc-shaped end block 41 and the bottom of the C-ring 46 is a plane. Therefore, the surface where the grinding annular belt 3 to be ground is located is a plane, making the grinding smoother.

[0051] The end expansion ring 4 also includes an inner notch ring 42 and an outer semi-ring arc plate 43. The inner notch ring 42 is fixed on the C-shaped ring 46, and the two ends of the inner notch ring 42 are fixed on the two ends of the arc-shaped end block 41. The setting of the inner notch ring 42 provides a smooth curved surface for the movement of the grinding annular belt 3, making the displacement of the first grinding belt 31, the second grinding belt 32 and the third grinding belt 33 smoother and smoother.

[0052] The outer half-ring arc plate 43 is provided in multiple configurations and is equidistant from the circumference and is rotatably provided on the C-shaped ring 46. Figure 6 In the initialization state, a plurality of rotation grooves 44 are provided on the inner notch ring 42, and the plurality of rotation grooves 44 are equidistantly arranged on the circumference, and the outer semi-ring arc plate 43 rotates on the C-shaped ring 46 through the rotation support semi-ring 45 arranged in the rotation groove 44, wherein the outer semi-ring arc plate 43 is reset and rotated on the C-shaped ring 46 by the reset spring and the rotation support semi-ring 45. In the initialization state, the outer semi-ring arc plate 43 is vertically arranged, and the plurality of outer semi-ring arc plates 43 cooperate with the inner notch ring 42 to form a ring. Therefore, when the outer semi-ring arc plate 43 rotates and opens on the outer side wall of the C-shaped ring 46 through the support semi-ring 45, the end expansion ring 4 originally as a whole will be in an expanded state.

[0053] The arc-shaped end block 41 is provided with a lifting arc hole 18, and an annular plate 19 slides in the lifting arc hole 18, so the annular plate 19 slides vertically on the arc-shaped end block 41 through the lifting arc hole 18, wherein a connecting tube 5 is provided between the two end expansion rings 4, and the connecting tube 5 is installed on the top of the arc-shaped end block 41 through the mounting groove 17, and the mounting groove 17 is provided with a through hole connected to the lifting arc hole 18, and a rotating rod 15 driven by an external driving device is coaxially provided in the connecting tube 5, and a first threaded hole is provided on the annular plate 19, and one end of the rotating rod 15 is provided with a spiral block 16 that extends into the lifting arc hole 18 and is adapted to the first threaded hole on the annular plate 19. It should be noted that the spiral blocks 16 arranged at both ends of the rotating rod 15 rotate in opposite directions, and the external driving device is a driving motor. Therefore, after the external driving device is turned on, the rotating rod 15 is driven to rotate, and the spiral block 16 extending through the lifting arc hole 18 rotates, and drives the annular plate 19 to rise and fall in the lifting arc hole 18.

[0054] The annular plate 19 is provided with a pushing ring plate 20 on the side facing the outer semi-annular arc plate 43 for pushing the outer semi-annular arc plate 43 to flip over. Therefore, when the annular plate 19 is lifted, the pushing ring plate 20 will also be lifted together. It should be noted that when the pushing ring plate 20 is not lifted in the initial position, the pushing ring plate 20 is against the inner wall of the outer semi-annular arc plate 43. When the pushing ring plate 20 is lifted, the pushing ring plate 20 will push the inner wall of the outer semi-annular arc plate 43 and push the outer semi-annular arc plate 43 to flip over. The flipping direction is outward. Therefore, at this time, the outer wall of the end expansion ring 4 as a whole tends to expand, and pushes the polished annular belt 3 originally located on the outer side wall of the end expansion ring 4 to open, that is, it is originally as Figure 3 The outer diameter of the polished annular belt 3 in this state will increase compared to before.

[0055] It should be noted that as the pushing ring plate 20 is lifted, the outer semi-annular arc plate 43 is pushed to flip over, thereby slightly tightening the grinding annular belt 3, which does not affect the grinding of the generator cylinder head surface by the grinding annular belt 3.

[0056] Furthermore, due to the expansion of the outer diameter of the grinding annular belt 3, it adapts to different grinding states. The specific adaptation states are as follows:

[0057] First, the C-shaped grinding annular belt 3 is extended into the cylindrical groove on the surface of the generator cylinder head to complete the preliminary grinding of the inner wall of the cylindrical groove. Then, the grinding area of the grinding annular belt 3 is adjusted, that is, after switching the first grinding belt 31 to the second grinding belt 32 in the grinding area, the external driving device is turned on to rotate the spiral block 16 on the rotating rod 15, thereby driving the annular plate 19 to rise. In the process of the annular plate 19 rising, the pushing ring plate 20 will also be lifted, and the outer semi-annular arc plate 43 will be flipped, and its flipping direction is outward, finally achieving the grinding annular plate. The outer diameter of the annular belt 3 will be slightly larger than before. At this time, the mesh number of the second polishing belt 32 is increased, and the outer diameter of the polished annular belt 3 is slightly increased, so it will fit more closely to the inner wall of the cylindrical groove on the surface of the generator cylinder head, so that the second polishing belt 32 with multiple meshes continues to polish the inner wall of the cylindrical groove for the second time, and then repeat the above operation, so that the third polishing belt 33 is once again close to the inner wall of the cylindrical groove for three times of polishing. In this process, the outer diameter of the polished annular belt will be enlarged three times in sequence after the initial polishing, secondary polishing and tertiary polishing, so that the subsequent polishing can better fit the polishing.

[0058] Reference Figure 2In this state, the limit clamping assembly includes a first clamping plate 12 and a second clamping plate 14. The first clamping plate 12 is arranged at the opposite end of the C-shaped grinding annular belt 3, and the second clamping plate 14 is arranged in two and symmetrically arranged on both sides of the first clamping plate 12. The first clamping plate 12 is lifted and slid on the outer wall of the connecting tube 5 through the connecting rod and the slide groove, and the second clamping plate 14 moves on the first clamping plate 12 through the driving member 13 and clamps the grinding annular belt 3. In this state, the first clamping plate 12 and the second clamping plate 14 clamp the third grinding belt 33 to provide clamping force for pulling and lifting. Due to the clamping of the driving members 13 at both ends of the first clamping plate 12, it can ensure that the grinding annular belt 3 provides stable support in the end expansion ring 4 setting, prevent the grinding annular belt 3 from rotating around the rotating shaft 1, and provide side support for the stable grinding of the grinding annular belt 3.

[0059] The limit clamping assembly also includes a rotating screw 6 and a lifting plate 11. A second threaded hole is provided on the lifting plate 11. The rotating screw 6 is connected to the lifting plate 11 through the second threaded hole. The lifting plate 11 is connected to the first clamping plate 12. The driving member 13 is a hydraulic rod. The output end of the hydraulic rod is connected to the second clamping plate 14 and drives the second clamping plate 14 to move toward the first clamping plate 12. The grinding annular belt 3 is located between the second clamping plate 14 and the first clamping plate 12. Therefore, by rotating the screw 6 forward and reverse, the clamped grinding annular belt 3 can be driven to shift. The driving motor 10 is used to drive the rotating screw 6 to rotate forward and reverse to drive the first clamping plate 12 to rise and fall. When the replacement is completed, the driving member 13 is used to move the second clamping plate 14 away from the first clamping plate 12 to loosen the grinding annular belt 3. Then the rotating screw 6 is reversed to allow the first clamping plate 12 to move the second clamping plate 14 down, and the driving member 13 is opened again to allow the first clamping plate 12 and the second clamping plate 14 to clamp the first grinding belt 31. At this time, the lower end expansion ring 4 is covered with the second grinding belt 32, and the secondary grinding is started to complete the replacement.

[0060] The working principle of the present invention is as follows:

[0061] First, the external drive motor is turned on to rotate the rotating shaft 1. Under the driving action, the rotating shaft 1 rotates with the grinding annular belt 3, thereby grinding the annular area where the grinding annular belt 3 contacts the surface of the generator cylinder head.

[0062] For the grinding of the inner wall of the cylindrical groove on the surface of the generator cylinder head, the end expansion ring 4 that is adapted to the cylindrical groove can be selected and adjusted, and the outer wall of the end expansion ring 4 is covered with a grinding annular belt 3. Therefore, when the rotating shaft 1 is reciprocated and lifted in the cylindrical groove, the inner wall of the cylindrical groove on the surface of the generator cylinder head is ground.

[0063] By means of the limiting clamping assembly, the position of the first grinding belt 31, the second grinding belt 32 or the third grinding belt 33 on the end expansion ring 4 moved out close to the surface of the generator cylinder head is changed, and finally the corresponding grinding roughness is changed. Finally, the change of the grinding roughness is achieved without stopping the grinding, thereby improving the grinding adaptability and grinding diversity.

[0064] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A grinding device for machining a generator cylinder head, comprising an external drive motor and a rotating shaft arranged at the output end of the external drive motor, characterized in that: The rotating shaft outer sleeve is provided with a grinding annular belt for grinding the generator cylinder head. The grinding annular belt is bent into a C shape and is coaxially arranged with the rotating shaft. The rotating shaft is coaxially fixed with two end expansion rings through a bracket assembly. The C-shaped grinding annular belt is passed through the two end expansion rings. The grinding annular belt includes a first grinding belt, a second grinding belt and a third grinding belt connected in sequence end to end. The bracket assembly is provided with a limit clamping assembly for shifting and positioning the grinding annular belt. The end expansion ring includes: Arc-shaped end block and C-shaped ring, the C-shaped ring is disassembled and installed on both sides of the arc-shaped end block, and the bottom of the C-shaped ring is flush with the bottom of the arc-shaped end block; The inner notch ring and the outer semi-ring arc plate, the inner notch ring is fixed on the C-shaped ring, and the two ends of the inner notch ring are fixed on the two ends of the arc end block, the outer semi-ring arc plate is set in multiple ways, and is equidistant around the circumference and rotatably set on the C-shaped ring, the first grinding belt, the second grinding belt and the third grinding belt are grinding belts with increasing abrasive grain size, the grinding annular belt is wrapped around the outer wall of the end expansion ring, a lifting arc hole is opened on the arc end block, and an annular plate slides in the lifting arc hole, and a pushing ring plate is provided on the side of the annular plate facing the outer semi-ring arc plate to push the outer semi-ring arc plate to flip, a connecting tube is provided between the two end expansion rings, and the connecting tube is installed on the top of the arc end block through a mounting groove, a through hole connected to the lifting arc hole is opened on the mounting groove, a rotating rod driven by an external driving device is coaxially provided in the connecting tube, a first threaded hole is opened on the annular plate, and a spiral block is provided at one end of the rotating rod that extends into the lifting arc hole and adapts to the first threaded hole on the annular plate.

2. A grinding device for machining a generator cylinder head according to claim 1, characterized in that: The bracket assembly includes: Two end plates, the end plates are fixed coaxially with the rotating shaft, and the end expansion rings are connected to the end plates through a connecting frame; A brush disc is slidably mounted on the rotating shaft, and the brush disc is provided with bristles that abut against the polishing annular belt. An electric push rod for driving the brush disc to rise and fall is arranged on one end disc.

3. A grinding device for machining a generator cylinder head according to claim 1, characterized in that: A plurality of rotation grooves are provided on the inner notch ring, and the plurality of rotation grooves are arranged equidistantly around the circumference. The outer semi-ring arc plate rotates on the C-shaped ring through a rotation support semi-ring arranged in the rotation groove.

4. The grinding device for machining a generator cylinder head according to claim 1, characterized in that: The limit clamping assembly includes: The first clamping plate and the second clamping plate, the first clamping plate is arranged at the opposite ends of the C-shaped grinding annular belt, the second clamping plate is arranged in two and symmetrically arranged on both sides of the first clamping plate, the second clamping plate moves on the first clamping plate through the driving member and clamps the grinding annular belt.

5. A grinding device for machining a generator cylinder head according to claim 4, characterized in that: The limit clamping assembly also includes: A rotating screw and a lifting plate are provided, wherein a second threaded hole is provided on the lifting plate, the rotating screw is connected to the lifting plate through the second threaded hole, and the lifting plate is connected to the first clamping plate; The driving motor is used to drive the screw rod to rotate forward and reverse to drive the first clamping plate to move up and down.

6. The grinding device for machining a generator cylinder head according to claim 1, characterized in that: The driving member is a hydraulic rod, the output end of which is connected to the second clamping plate and drives the second clamping plate to move toward the first clamping plate. The grinding annular belt is located between the second clamping plate and the first clamping plate.

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