Grinding wheel device for inner hole polishing

Abstract

The utility model discloses a grinding wheel device for inner hole polishing belongs to inner hole polishing technical field, a grinding wheel device for inner hole polishing, including numerical control machine tool main part and transmission mechanism, the transmission mechanism is fixed in the top surface of milling machine of numerical control machine tool main part, the output of transmission mechanism coaxially fixed with transmission rod, the one end away from transmission mechanism of transmission rod coaxially fixed with first connecting disc, the one side fixed with connecting block away from transmission mechanism of first connecting disc, the one side of connecting block away from first connecting disc is equipped with second connecting disc, a plurality of positioning holes are seted up in the one side of second connecting disc, a plurality of mounting holes are seted up in the one side of second connecting disc and first connecting disc. The utility model solves the problem that the surface abrasive wear dulls after high-precision polishing, which leads to the deviation between the actual cutting position and the programmed tool setting point, causing dimensional deviation and shape error, and the use is inconvenient.

Description

Technical Field

[0001] This utility model belongs to the field of internal hole grinding technology, and more specifically, it relates to a grinding wheel device for internal hole grinding. Background Technology

[0002] This is a core tool specifically designed for grinding the internal channels of workpieces. Its core function is to remove excess material, modify shape, reduce roughness, and improve precision of internal holes through the rotation of the grinding wheel for cutting or grinding. It solves the pain points of narrow internal hole space, difficulty in tool access, and easy deviation in machining, laying the foundation for subsequent assembly or functional use. An existing gear internal hole grinding device with publication number CN219293475U uses a slider driven to cooperate with a push plate to make the grinding plate's radius along the axis of the mounting shaft adjustable, thereby expanding or narrowing the grinding range of the grinding plate. However, when performing high-precision grinding, the abrasive grains on the surface of the grinding wheel become dull after wear, causing a deviation between the actual cutting position and the programmed tool setting point, resulting in dimensional deviations and shape errors, which require dressing and are inconvenient to use. Therefore, a grinding wheel device for internal hole grinding is proposed. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a grinding wheel device for internal hole grinding. When the grinding wheel wears out after a period of operation, an external wrench can be used to loosen the second screw and connect it to the next threaded hole, causing the next arc surface of the abrasive block to move to the outermost side, thereby changing the grinding surface. This greatly reduces the frequency of grinding wheel dressing, thus solving the problem mentioned in the background technology that when performing high-precision grinding, the abrasive grains on the grinding wheel surface become dull after wear, causing a deviation between the actual cutting position and the programmed tool setting point, resulting in dimensional and shape errors, requiring dressing, and making it inconvenient to use.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a grinding wheel device for internal hole grinding, comprising a CNC machine tool body and a transmission mechanism. The transmission mechanism is fixed to the top surface of the milling machine of the CNC machine tool body. A transmission rod is coaxially fixed to the output end of the transmission mechanism. A first connecting plate is coaxially fixed to the end of the transmission rod away from the transmission mechanism. A connecting block is fixed to the side of the first connecting plate away from the transmission rod. A second connecting plate is provided on the side of the connecting block away from the first connecting plate. Multiple positioning holes are opened on one side of the second connecting plate. Both the second connecting plate and the first connecting plate have... The device has multiple mounting holes. Multiple locating pins are fixed to the side of the connecting block near the second connecting plate. The connecting block and the second connecting plate are fixedly connected by a first screw. A mounting groove is formed on the outer circumference of the connecting block. A connecting shaft is provided on the inner side of the mounting groove. An abrasive block is fixed to the outer side of the connecting shaft. Four arc surfaces are formed on the outer side of the abrasive block. Multiple gears are rotatably connected to the side of the first connecting plate near the transmission rod. A gear ring is rotatably connected to the outer circumference of the transmission rod. A second screw is threaded onto one side of the gear ring. Multiple threaded holes are also formed on the side of the first connecting plate near the transmission rod.

[0005] As a preferred embodiment of this utility model, one end of each of the locating pins is respectively inserted into a plurality of locating holes.

[0006] As a preferred embodiment of this invention, the positions of the plurality of mounting holes correspond to the positions of the plurality of connecting shafts.

[0007] As a preferred embodiment of this utility model, the mounting groove has a semi-circular structure, and the axis of the connecting shaft coincides with the axis of the mounting groove.

[0008] As a preferred embodiment of this utility model, the curvature of the four arc surfaces is the same, and the center of the outermost arc surface coincides with the center of the transmission rod.

[0009] As a preferred embodiment of this utility model, the inner sides of the plurality of gears are respectively coaxially and fixedly connected to one end of the connecting shaft, and the outer circumference of the gear ring meshes with the outer circumference of the gear.

[0010] As a preferred embodiment of this utility model, the position of the second screw corresponds to the position of the threaded hole.

[0011] This utility model provides a grinding wheel device for grinding internal holes, which has the following beneficial effects: This grinding wheel device for internal grinding can loosen the second screw and connect it to the next threaded hole using an external wrench when the grinding wheel becomes worn after working for a period of time. This allows the next arc surface of the abrasive block to move to the outermost side, thereby changing the grinding surface. This greatly reduces the frequency of grinding wheel dressing and to some extent solves the problem that when high-precision grinding is performed, the abrasive grains on the grinding wheel surface become dull after wear, causing deviations between the actual cutting position and the programmed tool setting point, resulting in dimensional and shape errors that require dressing and are inconvenient to use.

[0012] 2. The grinding wheel device for grinding internal holes has a reasonable and compact structure and good performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a grinding wheel device for grinding internal holes according to the present invention.

[0014] Figure 2 This is a schematic diagram showing the disassembled structure of a grinding wheel device for grinding internal holes according to the present invention.

[0015] Figure 3 This utility model relates to a grinding wheel device for grinding internal holes. Figure 2 Enlarged diagram of point A in the diagram.

[0016] Figure 4 This is a schematic diagram of the connection relationship of the connecting blocks of the grinding wheel device for grinding internal holes according to the present invention.

[0017] In the diagram: 1. CNC machine tool body; 2. Transmission mechanism; 3. Transmission rod; 4. First connecting plate; 5. Connecting block; 6. Second connecting plate; 7. Positioning hole; 8. Positioning pin; 9. Mounting groove; 10. Connecting shaft; 11. Abrasive block; 12. Arc surface; 13. Gear; 14. Gear ring; 15. Second screw; 16. Threaded hole; 17. Mounting hole; 18. First screw. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0019] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see Figures 1 to 4This utility model provides a technical solution: a grinding wheel device for internal hole grinding, including a CNC machine tool body 1 and a transmission mechanism 2. The transmission mechanism 2 is fixed to the top surface of the milling machine of the CNC machine tool body 1. A transmission rod 3 is coaxially fixed to the output end of the transmission mechanism 2. A first connecting plate 4 is coaxially fixed to the end of the transmission rod 3 away from the transmission mechanism 2. A connecting block 5 is fixed to the side of the first connecting plate 4 away from the transmission rod 3. A second connecting plate 6 is provided on the side of the connecting block 5 away from the first connecting plate 4. Multiple positioning holes 7 are opened on one side of the second connecting plate 6. Multiple mounting holes 17 are opened on one side of both the second connecting plate 6 and the first connecting plate 4. Multiple positioning pins 8 are fixed to the side of the connecting block 5 near the second connecting plate 6. The connecting block 5 and the second connecting plate 6 are fixedly connected by a first screw 18. An mounting groove 9 is opened on the outer circumference of the connecting block 5. A connecting shaft 10 is provided on the inner side of the mounting groove 9. An abrasive block 1 is fixed to the outer side of the connecting shaft 10. 1. The abrasive block 11 has four arc surfaces 12 on its outer side. The first connecting plate 4 is rotatably connected to multiple gears 13 on the side near the transmission rod 3. The outer circumference of the transmission rod 3 is rotatably connected to a gear ring 14. A second screw 15 is threadedly connected to one side of the gear ring 14. The first connecting plate 4 is also provided with multiple threaded holes 16 on the side near the transmission rod 3. One end of multiple positioning pins 8 is respectively inserted into multiple positioning holes 7. The positions of multiple mounting holes 17 are respectively corresponding to the positions of multiple connecting shafts 10. The mounting groove 9 has a semi-circular structure. The axis of the connecting shaft 10 coincides with the axis of the mounting groove 9. The curvature of the four arc surfaces 12 is the same. The center of the outermost arc surface 12 coincides with the center of the transmission rod 3. The inner sides of multiple gears 13 are coaxially fixedly connected to one end of the connecting shaft 10. The outer circumference of the gear ring 14 meshes with the outer circumference of the gear 13. The position of the second screw 15 corresponds to the position of the threaded hole 16. In use, firstly, the workpiece to be ground is fixed on the three-jaw chuck of the CNC machine tool body 1. Then, by adjusting the milling machine, the outer side of the grinding wheel is brought into contact with the inner side of the workpiece's inner hole. While the three-jaw chuck rotates the workpiece, the transmission mechanism 2 drives the grinding wheel to rotate along the inner side of the workpiece's inner hole, thereby grinding the inner hole. When the grinding wheel wears out after working for a period of time, the second screw 15 is loosened using an external wrench and threaded into the next threaded hole 16. At this time, the gear ring 14 drives multiple gears 13 and the connecting shaft 10 to rotate 90 degrees synchronously, causing the next arc surface 12 of the abrasive block 11 to move to the outermost position. The center of the arc surface 12 coincides with the center of the transmission rod 3. Multiple arc surfaces 12 are located on the same circle. Through the above process, when the grinding wheel wears out after working for a period of time, the second screw 15 can be loosened by an external wrench and threaded into the next threaded hole 16, so that the next arc surface 12 of the abrasive block 11 moves to the outermost side, thereby changing the grinding surface. This greatly reduces the frequency of grinding wheel dressing and to a certain extent solves the problem that when high-precision grinding is performed, the abrasive grains on the grinding wheel surface become dull after wear, causing the actual cutting position to deviate from the programmed tool setting point, resulting in dimensional deviations and shape errors, requiring dressing and making it inconvenient to use.

[0022] The specific usage and function of this embodiment: When using this utility model, firstly, the workpiece to be ground is fixed on the three-jaw chuck of the CNC machine tool body 1. Then, by adjusting the milling machine, the outer side of the grinding wheel is brought into contact with the inner side of the workpiece's inner hole. While the three-jaw chuck drives the workpiece to rotate, the transmission mechanism 2 drives the grinding wheel to rotate along the inner side of the workpiece's inner hole, thereby grinding the inner hole. When the grinding wheel wears out after working for a period of time, the second screw 15 is loosened using an external wrench and threaded into the next threaded hole 16. At this time, the gear ring 14... Multiple gears 13 and connecting shaft 10 rotate synchronously by 90 degrees, causing the next arc surface 12 of the abrasive block 11 to move to the outermost position. Since the center of the outermost arc surface 12 coincides with the center of the transmission rod 3, multiple arc surfaces 12 are located on the same circle. Through the above process, when the grinding wheel wears out after working for a period of time, the second screw 15 can be loosened by an external wrench and threaded into the next threaded hole 16, causing the next arc surface 12 of the abrasive block 11 to move to the outermost position, thereby changing the grinding surface and greatly reducing the frequency of grinding wheel dressing.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A grinding wheel device for internal hole grinding, comprising a CNC machine tool body (1) and a transmission mechanism (2), characterized in that: The transmission mechanism (2) is fixed to the top surface of the milling machine of the CNC machine tool body (1). The output end of the transmission mechanism (2) is coaxially fixed with a transmission rod (3). The end of the transmission rod (3) away from the transmission mechanism (2) is coaxially fixed with a first connecting plate (4). The side of the first connecting plate (4) away from the transmission rod (3) is fixed with a connecting block (5). The side of the connecting block (5) away from the first connecting plate (4) is provided with a second connecting plate (6). A plurality of positioning holes (7) are opened on one side of the second connecting plate (6). A plurality of mounting holes (17) are opened on one side of both the second connecting plate (6) and the first connecting plate (4). A plurality of positioning pins (8) are fixed on the side of the connecting block (5) near the second connecting plate (6). The connecting block (5) and the second connecting plate (6) are fixedly connected by the first screw (18). The outer circumference of the connecting block (5) is provided with an installation groove (9). The inner side of the installation groove (9) is provided with a connecting shaft (10). The outer side of the connecting shaft (10) is fixed with an abrasive block (11). The outer side of the abrasive block (11) is provided with four arc surfaces (12). The side of the first connecting plate (4) near the transmission rod (3) is rotatably connected with multiple gears (13). The outer circumference of the transmission rod (3) is rotatably connected with a gear ring (14). The side of the gear ring (14) is threaded with a second screw (15). The side of the first connecting plate (4) near the transmission rod (3) is also provided with multiple threaded holes (16).

2. The grinding wheel device for internal hole grinding according to claim 1, characterized in that: One end of each of the locating pins (8) is respectively inserted into a plurality of locating holes (7).

3. The grinding wheel device for internal hole grinding according to claim 1, characterized in that: The positions of the plurality of mounting holes (17) correspond to the positions of the plurality of connecting shafts (10).

4. The grinding wheel device for internal hole grinding according to claim 1, characterized in that: The mounting groove (9) has a semi-circular structure, and the axis of the connecting shaft (10) coincides with the axis of the mounting groove (9).

5. The grinding wheel device for internal hole grinding according to claim 1, characterized in that: The four arc surfaces (12) have the same curvature, and the center of the outermost arc surface (12) coincides with the center of the transmission rod (3).

6. The grinding wheel device for internal hole grinding according to claim 1, characterized in that: The inner sides of the plurality of gears (13) are respectively coaxially fixedly connected to one end of the connecting shaft (10), and the outer circumference of the gear ring (14) meshes with the outer circumference of the gear (13).

7. The grinding wheel device for internal hole grinding according to claim 1, characterized in that: The position of the second screw (15) corresponds to the position of the threaded hole (16).

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