Direct-connection grinding tool of boring and milling machine

Abstract

The utility model discloses a boring and milling machine direct-connection grinding tool, which belongs to the technical field of grinding processing, and comprises a main handle, a first conical surface, a second conical surface, a third conical surface and a fourth conical surface, the grinding wheel is detachably installed at the other end of the main handle through a connecting assembly, and the grinding wheel and the main handle are coaxially arranged; the balance cover is coaxially mounted on the grinding wheel; the balance block is detachably installed on the balance cover, the general cutter handle structure is directly connected with a machine tool spindle, and compared with an existing grinding device driven by an external motor, the connecting mode is more convenient and faster. The machine tool spindle is used for direct driving, the problems that an existing external motor is small in power and low in grinding efficiency are solved, and the grinding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of grinding technology, and in particular to a direct-drive grinding tool for boring and milling machines. Background Technology

[0002] Existing grinding devices for boring and milling machines mainly adopt an external motor drive, which has the following drawbacks:

[0003] 1. Cumbersome connection method: The external motor needs to be connected to the machine tool spindle through a complicated adapter mechanism, which is inconvenient to operate and poses a risk of loosening or falling off.

[0004] 2. Insufficient power and low efficiency: The power of external motors is generally small, which makes it difficult to meet the requirements of high-efficiency grinding, especially when grinding precision parts.

[0005] 3. Poor stability: The external motor vibrates significantly, affecting the grinding quality and making it difficult to achieve precise, fast, and efficient grinding.

[0006] The aforementioned shortcomings of existing externally driven grinding devices limit the expansion of machine tool processing capabilities and the improvement of grinding accuracy. Due to the continuous improvement in processing accuracy and efficiency, there is an urgent need for a grinding device that is simple to connect, has high grinding efficiency, and low vibration to meet practical requirements. Utility Model Content

[0007] This utility model provides a direct-drive grinding tool for boring and milling machines to solve the problems in the prior art.

[0008] The present invention adopts the following technical solution: a direct-drive grinding tool for a boring and milling machine, comprising: a main shank, one end of which is configured with a first conical surface, and coaxially mounted on the spindle of the boring and milling machine via a tool holder structure; a grinding wheel, which is detachably mounted on the other end of the main shank via a connecting component, and the grinding wheel is coaxially arranged with the main shank; a balance cover, which is coaxially mounted on the grinding wheel; and a balance block, at least one of which is detachably mounted on the balance cover.

[0009] Preferably, the connecting assembly includes at least: a grinding wheel holder having a tapered hole, the other end of the main shank being configured as a second tapered surface and coaxially embedded in the tapered hole; and a locking bolt, the screw structure of which passes through the through hole of the grinding wheel holder and is threadedly connected to the first threaded hole at the other end of the main shank, the head structure of the locking bolt abutting against the first limiting wall on the grinding wheel holder to achieve axial limiting of the grinding wheel holder relative to the main shank.

[0010] Preferably, the connecting assembly further includes a locking nut, the grinding wheel seat has an outer annular wall and an external threaded end; the grinding wheel is sleeved on the outer annular wall and abuts against the second limiting wall on the grinding wheel seat, the balance cover is sleeved on the grinding wheel seat and abuts against one end of the grinding wheel, and the locking nut is threadedly connected to the external threaded end; by tightening the locking nut, the grinding wheel is axially limited between the balance cover and the second limiting wall.

[0011] Preferably, the tightening direction of the locking bolt is opposite to the working rotation direction of the grinding wheel.

[0012] Preferably, the balance cover has an annular groove coaxial with the grinding wheel, the bottom surface of the annular groove being larger than the opening size of the annular groove, the balance block being embedded in the annular groove and movable relative to the trajectory of the annular groove, the balance block having a second threaded hole pointing directly to the bottom surface of the annular groove, and being threadedly connected to the second threaded hole by a second bolt and pressed against the bottom surface of the annular groove.

[0013] Preferably, the annular groove has a notch at one point, through which the balance block enters the annular groove.

[0014] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0015] The universal tool holder structure connects directly to the machine tool spindle, offering a more convenient and faster connection compared to existing externally driven grinding devices. Direct spindle drive solves the problems of low power and low grinding efficiency associated with existing externally driven motors, thus improving grinding efficiency.

[0016] Furthermore, the entire tool set can perform multi-station grinding along with the machine tool spindle. Depending on the specifications of the grinding wheels, it can grind various features and is suitable for various equipment such as milling machines, boring machines, mill-turn centers, and multi-axis machining centers, expanding the machine tool's processing capabilities and achieving integrated milling and grinding. Meanwhile, the design of the balance cover and balance block effectively reduces vibration during the grinding process, ensuring grinding quality. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention;

[0020] Figure 3This is an assembly diagram of the main handle, grinding wheel seat, and locking bolt of this utility model;

[0021] Figure 4 This is an assembly diagram of the grinding wheel, grinding wheel seat, balance cover and locking nut of this utility model;

[0022] Figure 5 This is a perspective view of the balance cover and balance block of this utility model;

[0023] Figure 6 This is a three-dimensional structural cross-sectional view of the balance cover and balance block of this utility model.

[0024] Figure Labels

[0025] 1-Main shank; 11-First conical surface; 12-Second conical surface; 13-First threaded hole; 2-Grinding wheel; 3-Connecting assembly; 31-Grinding wheel seat; 311-Conical hole; 312-Through hole; 313-First limiting wall; 314-Outer annular wall; 315-External threaded end; 316-Second limiting wall; 32-Locking bolt; 33-Locking nut; 4-Balance cap; 41-Annular groove; 42-Notch; 5-Balance block; 51-Second threaded hole; 6-Second bolt. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0027] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0028] Reference Figures 1 to 6 As shown, this utility model embodiment provides a direct-drive grinding tool for a boring and milling machine, which includes a main shank 1, a grinding wheel 2, a balance cover 4, and a balance block 5.

[0029] One end of the main shank 1 is configured with a first conical surface 11, which is coaxially mounted on the boring and milling machine spindle via the tool holder structure, achieving connection with the machine tool spindle and providing a power source for the entire grinding tool; the other end is used to mount the grinding wheel 2, ensuring that the grinding wheel 2 is coaxial with the main shank 1 and guaranteeing grinding accuracy. It should be noted that the tool holder structure, as prior art, is not shown in the figure. Taking a boring tool holder as an example, it is mainly used to connect the boring bar (i.e., equivalent to the main shank 1 of this application) and the machine tool spindle. One end is an interface that matches the machine tool spindle. This interface usually follows certain standards to ensure accurate installation on different models of boring machine spindles. The other end of the boring tool holder is the part connected to the boring bar, and the connection method varies depending on the type and requirements of the boring bar. For example, for some small boring bars, a straight shank insertion connection may be used, with the boring bar fixed by a set screw; for large boring bars, a tapered shank connection may be used, utilizing the self-locking property of the tapered surface to ensure a tight connection.

[0030] The grinding wheel 2 is detachably installed on the other end of the main shank 1 via the connecting component 3, and the grinding wheel 2 is coaxially arranged with the main shank 1. The grinding wheel 2 is the component that directly performs grinding operations. Depending on its size and specifications, it can grind features such as the outer circle, inner hole, and plane of the workpiece.

[0031] The balance cover 4 is coaxially mounted on the grinding wheel 2, and at least one balance block 5 is configured and detachably mounted on the balance cover 4. By adjusting the position and number of balance blocks 5, the grinding wheel 2 can be further precisely balanced, thereby enhancing the stability of grinding.

[0032] In actual operation, the main shank 1 is coaxially mounted on the boring and milling machine spindle via its first conical surface 11 at one end, utilizing a tool holder structure. The grinding wheel 2 is detachably mounted on the other end of the main shank 1 using the connecting assembly 3, ensuring coaxiality between the grinding wheel 2 and the main shank 1. Depending on the actual grinding requirements, appropriate balance blocks 5 are detachably installed on the balance cover 4 to adjust the balance of the grinding wheel 2. The machine spindle is started, and the grinding wheel 2 rotates via the main shank 1, performing grinding operations on the workpiece for different features such as outer diameters, inner holes, and planes.

[0033] In this embodiment, the grinding device is directly connected to the machine tool spindle via a universal tool holder structure, which is more convenient and faster than existing externally driven grinding devices. Direct drive from the machine tool spindle solves the problems of low power and low grinding efficiency associated with existing externally driven motors, thus improving grinding efficiency.

[0034] In addition, the entire tool set can perform multi-station grinding along with the machine tool spindle. Depending on the different specifications of the grinding wheel 2, it can grind a variety of features and is suitable for various equipment such as milling machines, boring machines, turning and milling centers, and multi-axis machining centers, thus expanding the machine tool's processing capabilities and realizing integrated milling and grinding.

[0035] Meanwhile, the design of the balance cover 4 and the balance block 5 effectively reduces vibration during the grinding process and ensures grinding quality.

[0036] In some practical applications, refer to Figures 1 to 4 As shown, the connecting component 3 includes at least a grinding wheel 2 seat and a locking bolt 32, which is mainly used to connect the grinding wheel 2 seat to the main handle 1.

[0037] The grinding wheel 2 holder has a tapered hole 311, and the other end of the main shank 1 is configured as a second tapered surface 12 and coaxially embedded in the tapered hole 311; the locking bolt 32 has a screw structure that passes through the through hole 312 of the grinding wheel 2 holder and is threadedly connected to the first threaded hole 13 at the other end of the main shank 1, and the head structure of the locking bolt 32 abuts against the first limiting wall 313 on the grinding wheel 2 holder to achieve axial limiting of the grinding wheel 2 holder relative to the main shank 1.

[0038] The end of the main shank 1 with the second conical surface 12 is coaxially inserted into the conical hole 311 of the grinding wheel 2 seat to complete the initial positioning. The screw of the locking bolt 32 is then passed through the through hole 312 of the grinding wheel 2 seat and screwed into the first threaded hole 13 at the other end of the main shank 1. The bolt is tightened until the bolt head is firmly against the first limiting wall 313 of the grinding wheel 2 seat, achieving axial limiting of the grinding wheel 2 seat relative to the main shank 1, thus completing the connection between the grinding wheel 2 seat and the main shank 1. It should be noted that the tightening direction of the locking bolt 32 is opposite to the working rotation direction of the grinding wheel 2.

[0039] The dual protection of the conical surface fit and the axial limiting of the locking bolt 32 ensures a firm connection between the grinding wheel 2 seat and the main shank 1. This allows the wheel to withstand significant forces during grinding, preventing loosening and ensuring stable grinding operations. The coaxial fit between the conical surfaces of the main shank 1 and the grinding wheel 2 seat helps guarantee their coaxiality, thereby improving grinding accuracy and meeting the requirements of high-precision machining.

[0040] In some practical applications, refer to Figures 1 to 4 As shown, the connecting assembly 3 further includes a locking nut 33. The grinding wheel 2 seat has an outer annular wall 314 and an external threaded end 315. The grinding wheel 2 is sleeved on the outer annular wall 314 and abuts against the second limiting wall 316 on the grinding wheel 2 seat. The balance cover 4 is sleeved on the grinding wheel 2 seat and abuts against one end of the grinding wheel 2. The locking nut 33 is threadedly connected to the external threaded end 315. By tightening the locking nut 33, the grinding wheel 2 is axially limited between the balance cover 4 and the second limiting wall 316.

[0041] The locking nut 33 is threaded onto the external thread end 315 of the grinding wheel 2 holder. By tightening, the grinding wheel 2 is axially confined between the balance cover 4 and the second limiting wall 316 of the grinding wheel 2 holder, thus fixing the grinding wheel 2 and the balance cover 4 and ensuring that the grinding wheel 2 will not undergo axial displacement during grinding. At the same time, it completes the installation and positioning of the balance cover 4, ensuring the stability of the entire grinding assembly.

[0042] The balance cover 4 is fitted onto the grinding wheel 2 and abuts against one end of the grinding wheel 2, directly contacting the grinding wheel 2 to ensure the contact area for tightening force and prevent the grinding wheel 2 from being crushed due to excessive local force when tightening the locking nut 33. At the same time, it assists the locking nut 33 in axially limiting the grinding wheel 2, ensuring the balance of the grinding wheel 2 during rotation, reducing vibration, and improving grinding quality.

[0043] The locking nut 33 not only completes the installation of the balance cover 4, but also enables the installation of the grinding wheel 2, reducing the number of parts, simplifying the assembly process, and improving assembly efficiency.

[0044] In some practical applications, refer to Figures 5 to 6 As shown, the connection between the balance cover 4 and the balance block 5 is designed as follows: Specifically, the balance cover 4 has an annular groove 41 coaxial with the grinding wheel 2. The bottom surface of the annular groove 41 is larger than the opening surface of the annular groove 41. The balance block 5 is embedded in the annular groove 41 and can move relative to the trajectory of the annular groove 41. The balance block 5 has a second threaded hole 51 pointing to the bottom surface of the annular groove 41. It is threadedly connected to the second threaded hole 51 by a second bolt 6 and pressed against the bottom surface of the annular groove 41.

[0045] It should be noted that a notch 42 may be provided at one point of the annular groove 41 if necessary, through which the balance block 5 enters the annular groove 41.

[0046] In the actual assembly process, the balance block 5 is inserted into the annular groove 41 through the notch 42. Based on the balance state of the grinding wheel 2 during rotation, the position of the balance block 5 within the annular groove 41 is moved. By changing the position of the balance block 5, the center of gravity distribution of the entire grinding tool is adjusted to achieve the purpose of balancing the grinding wheel 2. After the balance block 5 is moved to the appropriate position, the second bolt 6 is screwed into the second threaded hole 51 of the balance block 5 until the second bolt 6 abuts against the bottom surface of the annular groove 41, fixing the position of the balance block 5 and completing the balance adjustment.

[0047] The balance block 5 can move flexibly within the annular groove 41, precisely adjusting the balance of the grinding wheel 2, effectively reducing vibration during grinding wheel 2 rotation, improving grinding accuracy and machining quality, and extending the service life of the grinding wheel 2 and the machine tool. The annular groove 41 has a notch 42 for easy installation and removal of the balance block 5.

[0048] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A direct-drive grinding tool for a boring and milling machine, characterized in that, include: The main shank (1) has one end configured as a first conical surface (11) and is coaxially mounted on the spindle of the boring and milling machine; The grinding wheel (2) is detachably mounted on the other end of the main shank (1) via the connecting assembly (3), and the grinding wheel (2) is coaxial with the main shank (1); The balance cover (4) is coaxially mounted on the grinding wheel (2); At least one balance block (5) is provided and is detachably mounted on the balance cover (4).

2. The direct-drive grinding tool for boring and milling machines according to claim 1, characterized in that, The connection component (3) includes at least: The grinding wheel (2) holder has a conical hole (311), and the other end of the main shank (1) is configured as a second conical surface (12) and coaxially embedded in the conical hole (311); The locking bolt (32) has a screw structure that passes through the through hole (312) of the grinding wheel (2) seat and is threaded into the first threaded hole (13) at the other end of the main handle (1). The head structure of the locking bolt (32) abuts against the first limiting wall (313) on the grinding wheel (2) seat to achieve axial limiting of the grinding wheel (2) seat relative to the main handle (1).

3. A direct-drive grinding tool for boring and milling machines according to claim 2, characterized in that, The connecting assembly (3) further includes a locking nut (33), the grinding wheel (2) seat has an outer annular wall (314) and an external thread end (315); the grinding wheel (2) is sleeved on the outer annular wall (314) and abuts against the second limiting wall (316) on the grinding wheel (2) seat, the balance cover (4) is sleeved on the grinding wheel (2) seat and abuts against one end of the grinding wheel (2), and the locking nut (33) is threaded to the external thread end (315); by tightening the locking nut (33), the grinding wheel (2) is axially limited between the balance cover (4) and the second limiting wall (316).

4. A direct-drive grinding tool for boring and milling machines according to claim 2, characterized in that, The tightening direction of the locking bolt (32) is opposite to the working rotation direction of the grinding wheel (2).

5. A direct-drive grinding tool for boring and milling machines according to claim 1, characterized in that, The balance cover (4) has an annular groove (41) coaxial with the grinding wheel (2). The bottom surface of the annular groove (41) is larger than the opening of the annular groove (41). The balance block (5) is embedded in the annular groove (41) and can move relative to the trajectory of the annular groove (41). The balance block (5) has a second threaded hole (51) pointing to the bottom surface of the annular groove (41). It is threadedly connected to the second threaded hole (51) by a second bolt (6) and pressed against the bottom surface of the annular groove (41).

6. A direct-drive grinding tool for a boring and milling machine according to claim 5, characterized in that, The annular groove (41) has a notch (42) at one point, through which the balance block (5) enters the annular groove (41).

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