A replaceable abrasive strip type inner hole rough and fine grinding wheel

Abstract

This utility model provides a replaceable grinding wheel for rough and fine grinding of internal holes, belonging to the technical field of grinding equipment. It includes a main body, a circular boss integrally formed on the top of the main body, a locking nut threaded to the circular boss, a T-shaped mounting groove on the side wall of the main body, a spring hole in the inner wall of the T-shaped mounting groove, a spring disposed in the spring hole, and grinding discs inserted into the T-shaped mounting groove. This utility model utilizes the continuous radial elastic force of the spring on the grinding discs to counteract vibration and impact during grinding, avoiding the problem of grinding disc misalignment caused by loosening of traditional bolt fixings. Through the cooperation of the T-shaped mounting groove and the spring, the grinding discs can be directly inserted and removed axially. With the auxiliary ejection action of the spring, the replacement speed of a single grinding disc is fast, improving work efficiency. The six grinding discs of the wheel can be replaced individually, requiring only the replacement of worn parts, reducing consumable costs.

Description

Technical Field

[0001] This utility model belongs to the field of grinding equipment technology, specifically relating to a replaceable grinding wheel for rough and fine grinding of internal holes. Background Technology

[0002] Internal grinding is a crucial process in machining to ensure the accuracy of the inner diameter of a workpiece, and it is widely used in the manufacture of precision parts such as hydraulic cylinders, bearing rings, and mold guide sleeves. Currently, the grinding wheels used in internal grinding are mainly divided into two categories: integral grinding wheels and fixed grinding wheel wheels.

[0003] Traditional fixed-strip grinding wheels, where the grinding strips are glued or bolted to the workpiece, are difficult to replace and have high maintenance costs. Traditional integral grinding wheels, when grinding internal holes, concentrate the contact area between the wheel and the workpiece on a localized annular surface. Over time, this leads to uneven wear or localized abrasive grain shedding, making it impossible to replace worn areas individually, resulting in high consumable costs. Internal hole machining typically requires rough grinding followed by finish grinding. Since integral grinding wheels have a fixed abrasive grain size, separate roughing and finish grinding wheels are needed. Replacing the grinding wheel requires tool resetting and recalibration, leading to low work efficiency. Therefore, a replaceable-strip type of internal roughing and finish grinding wheel has been developed. Utility Model Content

[0004] The purpose of this invention is to provide a replaceable grinding wheel for rough and fine grinding of internal holes, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A replaceable grinding wheel for rough and fine grinding of internal bores includes a main body, a circular boss integrally formed on the top of the main body, a locking nut that engages with the circular boss via a thread, a T-shaped mounting groove formed on the side wall of the main body, a spring hole formed on the inner wall of the T-shaped mounting groove, a spring disposed in the spring hole, and a grinding disc inserted into the T-shaped mounting groove.

[0007] As a preferred embodiment of this utility model, the circular boss has an external thread on its outer periphery, an axially extending circular groove on its top, and a threaded hole for connecting a drive shaft at the bottom of the circular groove.

[0008] As a preferred embodiment of this utility model, the locking nut has a double-flat-edge arc structure, which is convenient for tightening with a wrench; the inner circumference of the locking nut is provided with an internal thread hole, and its inner thread cooperates with the external thread of the circular boss.

[0009] As a preferred embodiment of this utility model, six T-shaped mounting grooves are evenly distributed along the outer periphery of the main body. Each mounting groove axially penetrates the mounting part of the main body, and the groove length is equal to the axial length of the mounting part, forming a long through groove structure.

[0010] As a preferred embodiment of this utility model, six spring holes are evenly distributed circumferentially in the middle of the radial inner sidewall of the T-shaped mounting groove. The axis of each spring hole is perpendicular to the mounting plane of the grinding disc, and the depth direction of the hole is towards the center of the main body. The six spring holes are correspondingly arranged with the six T-shaped mounting grooves.

[0011] In a preferred embodiment of this utility model, there are 6 springs, which are respectively disposed in the 6 spring holes of the main body. The axis of each spring coincides with the radial center line of the corresponding T-shaped mounting groove, and the free end of each spring protrudes from the spring hole inlet and forms contact with the back of the corresponding grinding plate.

[0012] As a preferred embodiment of this utility model, there are 6 grinding discs, each of which is a long strip-shaped wear-resistant body. The working part of each disc has an arc-shaped grinding surface that contacts the workpiece, and the cross-section of the mounting part is a stepped structure that complements the T-shaped mounting groove. The 6 grinding discs are circumferentially and evenly installed in the T-shaped mounting groove of the main body.

[0013] Compared with existing technologies, the advantages of this invention are as follows: The continuous radial elastic force of the spring on the grinding disc can counteract the vibration and impact during grinding, avoiding the grinding disc misalignment problem caused by loosening of traditional bolt fixings. Through the T-shaped mounting groove and spring cooperation, the grinding disc can be directly inserted and removed axially. With the spring's auxiliary ejection action, the replacement speed of a single grinding disc is fast, improving work efficiency. The six grinding discs of the grinding wheel can be replaced individually, requiring only the replacement of worn parts, reducing consumable costs. Furthermore, by changing grinding discs of different grit sizes, continuous rough and fine grinding of the inner hole can be achieved on the same grinding wheel body without replacing the entire grinding wheel, adapting to the processing needs of various workpiece specifications. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the locking nut structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the main structure of this utility model.

[0019] In the diagram: 101, main body; 102, circular boss; 103, locking nut; 104, T-shaped mounting groove; 105, spring hole; 106, spring; 107, grinding disc. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0023] Example

[0024] Reference Figures 1-4 This embodiment of the present invention provides a replaceable grinding wheel for rough and fine grinding of inner bores, comprising a main body 101, a circular boss 102 integrally formed on the top of the main body 101, a locking nut 103 that engages with the circular boss 102 via threads, a T-shaped mounting groove 104 formed on the side wall of the main body 101, a spring hole 105 formed on the inner wall of the T-shaped mounting groove 104, a spring 106 disposed in the spring hole 105, and a grinding disc 107 inserted into the T-shaped mounting groove 104.

[0025] The main body 101 is made of high-strength alloy steel and has a stepped cylindrical structure, including a connecting part for connecting the equipment and a mounting part for mounting the grinding disc; a circular boss 102 is integrally formed with the top of the connecting part of the main body 101, the diameter of the boss is smaller than the diameter of the connecting part of the main body, and extends upward along the axial direction of the main body; the locking nut 103 is a ring-shaped metal part with an internal thread on its inner circumference, which engages with the external thread on the outer circumference of the circular boss 102, and is used to fasten the main body 101 to the drive shaft of the grinding equipment; a T-shaped mounting groove 104 is formed in the main body. The side wall of the mounting part 101 has a T-shaped groove cross section to accommodate the mounting part of the grinding disc 107; the spring hole 105 is opened on the inner side wall of the T-shaped mounting groove 104 and is a cylindrical blind hole for installing the spring 106; the spring 106 is a high-strength compression spring, which is assembled in the spring hole 105 and its end abuts against the bottom of the spring hole 105; the grinding disc 107 is made of diamond wear-resistant material, and the cross-sectional shape of its mounting end matches the T-shaped mounting groove 104. It is inserted into the T-shaped mounting groove 104 by plugging in to achieve a detachable connection.

[0026] Specifically, there are 6 T-shaped mounting grooves 104 evenly distributed along the outer periphery of the main body 101. Each mounting groove axially penetrates the mounting part of the main body 101, and the groove length is equal to the axial length of the mounting part, forming a long through groove structure.

[0027] Furthermore, there are 6 T-shaped mounting grooves 104 evenly distributed along the outer periphery of the mounting part of the main body 101. The circumferential angle between two adjacent grooves is 60°. Each T-shaped mounting groove 104 extends through the entire length of the mounting part of the main body 101 along the axial direction. The groove length is equal to the axial length of the mounting part, forming a long through groove structure that is adapted to the mounting part size of the grinding disc 107.

[0028] Preferably, there are 6 grinding discs 107, each of which is a long strip-shaped wear-resistant body. The working part of each disc has an arc-shaped grinding surface that contacts the workpiece, and the cross-section of the mounting part is a stepped structure that complements the T-shaped mounting groove 104. The 6 grinding discs 107 are circumferentially and evenly installed in the T-shaped mounting groove 104 of the main body 101.

[0029] It should be noted that the grinding disc 107 consists of six elongated wear-resistant bodies made of diamond grinding wheels; its working part has an arc-shaped grinding surface adapted to the inner hole workpiece, and the grinding surface grit size; the cross-section of its mounting part has a stepped structure complementary to the T-shaped mounting groove 104, ensuring a snug fit with the T-shaped groove; during assembly, the six grinding discs 107 are respectively inserted into the six T-shaped mounting grooves 104 along the axial direction, and pressed against the radial outer wall of the T-shaped groove by the elastic force of the spring 106, forming a circumferentially uniformly distributed grinding surface; during replacement, simply pull out the old grinding disc along the axial direction, the spring 106 automatically resets, and then insert the new grinding disc to complete the replacement.

[0030] In use, align the circular boss 102 on the top of the main body 101 with the end of the drive shaft of the grinding equipment, aligning the threaded hole 109 at the bottom of the boss with the external thread of the drive shaft. Manually screw the main body 101 in until its connecting end face is in contact with the shoulder of the drive shaft, ensuring axial positioning of the main body 101. Take the lock nut 103, align its internal thread with the external thread of the circular boss 102, use an open-end wrench to hold the double flat edges of the lock nut, and tighten clockwise until the end face of the nut is in contact with the shoulder of the drive shaft to prevent axial movement when the grinding wheel rotates at high speed. Select 6 grinding discs 107 that match the inner hole to be machined. Align the mounting end of each grinding disc 107 with the T-shaped mounting groove 104 of the main body 101, and insert it axially from the top of the mounting part of the main body until the entire length of the grinding disc matches the long through groove of the T-shaped mounting groove 104. At this time, the back of the grinding disc 107 contacts the free end of the spring 106, and the spring 106 is compressed to generate radial elastic force, pressing the grinding disc 107 tightly on the radial outer side wall of the T-shaped mounting groove 104. Align the inner hole of the workpiece to be processed with the grinding surface of the grinding disc of the grinding wheel, start the equipment to make the grinding wheel rotate, and slowly advance the workpiece to complete the rough grinding. After the rough grinding, replace with a fine-grit grinding disc and repeat the above operation to complete the fine grinding.

[0031] In summary, the continuous radial force exerted by spring 106 on grinding disc 107 can counteract vibration and impact during grinding, ensuring that grinding disc 107 remains in contact with the T-slot 104. This avoids the grinding disc misalignment problem caused by loosening of traditional bolt fixings. The six T-slots 104 and grinding disc 107 are evenly distributed circumferentially along the main body 101. Combined with the symmetrical force of spring 106, this ensures uniform radial force during grinding wheel rotation, preventing workpiece ellipticity deviations due to excessive localized force. Furthermore, the grinding disc 107 can be directly inserted and removed axially via the T-slots and springs. With the auxiliary ejection action of spring 106, individual grinding disc replacement is fast, improving work efficiency. The six grinding discs 107 can be replaced individually, requiring only the replacement of worn parts, reducing consumable costs. Simultaneously, by replacing grinding discs of different grit sizes, continuous rough and fine grinding of inner holes can be achieved on the same grinding wheel body without replacing the entire grinding wheel, adapting to the processing needs of various workpiece specifications.

[0032] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0033] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0034] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A replaceable grinding wheel for rough and fine grinding of internal bores, characterized in that: It includes a main body (101), a circular boss (102) integrally formed on the top of the main body (101), a locking nut (103) that engages with the circular boss (102) by a thread, a T-shaped mounting groove (104) opened on the side wall of the main body (101), a spring hole (105) opened on the inner wall of the T-shaped mounting groove (104), a spring (106) disposed in the spring hole (105), and a grinding disc (107) inserted into the T-shaped mounting groove (104).

2. The replaceable grinding wheel for rough and fine grinding of internal holes according to claim 1, characterized in that: The circular boss (102) has an external thread on its outer periphery and an axially extending circular groove on its top. The bottom of the circular groove has a threaded hole (109) for connecting the drive shaft.

3. The replaceable grinding wheel for rough and fine grinding of internal holes according to claim 2, characterized in that: The locking nut (103) has a double flat-edge arc structure, which makes it easy to tighten with a wrench; the locking nut (103) has an internal thread hole on its inner circumference, and its inner thread matches the external thread of the circular boss (102).

4. The replaceable grinding wheel for rough and fine grinding of internal holes according to claim 3, characterized in that: The T-shaped mounting groove (104) is evenly distributed in six places along the outer periphery of the main body (101). Each mounting groove axially penetrates the mounting part of the main body (101), and the groove length is equal to the axial length of the mounting part, forming a long through groove structure.

5. The replaceable grinding wheel for rough and fine grinding of internal holes according to claim 4, characterized in that: The T-shaped mounting groove (104) has six spring holes evenly distributed circumferentially in the middle of its radial inner sidewall. The axis of each spring hole (105) is perpendicular to the mounting plane of the grinding disc (107), and the depth direction of the hole is towards the center of the main body (101). The six spring holes are correspondingly arranged with the six T-shaped mounting grooves (104).

6. The replaceable grinding wheel for rough and fine grinding of internal holes according to claim 5, characterized in that: There are 6 springs (106), which are respectively set in the 6 spring holes of the main body (101). The axis of each spring (106) coincides with the radial center line of the corresponding T-shaped mounting groove (104), and the free end of each spring (106) protrudes from the spring hole inlet and forms contact with the back of the corresponding grinding plate (107).

7. The replaceable grinding wheel for rough and fine grinding of internal holes according to claim 6, characterized in that: There are 6 grinding discs (107), each of which is a long strip-shaped wear-resistant body. Its working part has an arc-shaped grinding surface that contacts the workpiece, and its mounting part has a stepped structure that is complementary to the T-shaped mounting groove (104). The 6 grinding discs (107) are evenly installed in the T-shaped mounting groove (104) of the main body (101) in a circumferential direction.

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