Start-stop vibration control device for long and thin grinding rod with large length-diameter ratio

Abstract

The utility model discloses a start-stop vibration control device for a long and thin grinding rod with a large length-diameter ratio, relates to the technical field of high-precision internal grinding machines, and is mainly used for solving the problem that the long and thin grinding rod is easy to instantly swing due to the action of centrifugal force in the start-stop process of a main shaft. According to the main structure, the device comprises a control vibration plate, one side of the control vibration plate is hinged to the upper portion of a mounting base in a vertical swing mode, a grinding rod limiting groove is formed in the lower edge of the other side of the control vibration plate, and a limiting assembly capable of limiting the swing angle of the control vibration plate is further arranged on the mounting base. The utility model provides a start-stop vibration control device for a long and thin grinding rod with a large length-diameter ratio, which can effectively prevent the grinding rod from swinging due to the action of centrifugal force when the grinding rod is started and stopped, and ensures the machining precision of a workpiece while protecting equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision internal grinding machines, in particular to a starting and stopping vibration control device for a slender grinding rod with a large length-diameter ratio. Background Art

[0002] As a key device for precision machining, in order to avoid interference with the workpiece, a high-precision internal grinding machine mainly uses a cantilever-type slender grinding rod with a large length-diameter ratio to cooperate with a grinding wheel for grinding the inner hole of the workpiece.

[0003] However, during the start-up and stop processes of the spindle, the slender grinding rod with this structure is prone to instantaneously swing due to the action of centrifugal force, directly affecting the machining accuracy of the workpiece. Especially in high-precision deep-hole grinding, the overhang of the grinding rod is greater, and its swinging phenomenon is more prominent. Even the grinding rod is prone to break due to large-amplitude vibration. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a starting and stopping vibration control device for a slender grinding rod with a large length-diameter ratio, which can effectively avoid the swinging phenomenon caused by the action of centrifugal force during the start-up and stop of the grinding rod, protect the equipment and ensure the machining accuracy of the workpiece at the same time.

[0005] The technical solution for the utility model to solve the above technical problems is: a starting and stopping vibration control device for a slender grinding rod with a large length-diameter ratio, including a control vibration plate with a vertical plate surface and a long plate structure. One side of the control vibration plate is vertically swingably hinged to the upper part of an installation base, and a grinding rod limiting groove is provided at the lower edge of the other side. The installation base is also provided with a limiting component capable of limiting the swinging angle of the control vibration plate.

[0006] As a further improvement of the utility model, the control vibration plate is vertically swingably hinged to the upper part of the installation base through a pin inserted vertically on its plate surface, and the upper part of the installation base is provided with an installation pin hole for the pin to be inserted and having a clearance fit with the outer wall of the pin.

[0007] As a further improvement of the utility model, the control vibration plate is provided with a fixing pin hole for the pin to be inserted and having an interference fit with the outer wall of the pin.

[0008] As a further improvement of the utility model, the limiting component includes an arc-shaped through groove extending along the swinging direction of the control vibration plate on the installation base. A limiting screw is arranged in the arc-shaped through groove. The screw end of the limiting screw is threadedly connected to the control vibration plate, and the nut end extends to the side of the arc-shaped through groove away from the control vibration plate.

[0009] As a further improvement of the utility model, a limiting screw hole for threadedly matching with the limiting screw is provided on the plate surface of the control vibration plate.

[0010] As a further improvement of the present utility model, an installation groove is provided on the lower surface of the installation base.

[0011] As a further improvement of the present utility model, a positioning screw is provided on the upper surface of the installation base, and the vertical end of the screw extends downward into the installation groove.

[0012] As a further improvement of the present utility model, the installation base is provided with a positioning screw hole for the positioning screw to pass through and threadedly cooperate with the positioning screw.

[0013] As a further improvement of the present utility model, the installation base is in an "L" shape.

[0014] As a further improvement of the present utility model, the grinding rod limiting groove is a trapezoidal groove with the short side on the upper side, and the length of the long side of the trapezoidal groove is greater than the diameter of the grinding rod, and the length of the short side is less than the diameter of the grinding rod.

[0015] Beneficial effects

[0016] Compared with the prior art, the advantages of a start-stop vibration control device for a long large aspect ratio slender grinding rod of the present utility model are as follows:

[0017] 1. By lapping the grinding rod limiting groove of the control vibration plate on the grinding rod and cooperating with the limiting component to lock the swinging angle of the control vibration plate, the device can limit the grinding rod during the start and stop processes, thereby avoiding the instantaneous flinging phenomenon of the grinding rod due to the centrifugal force during start and stop, further avoiding the fracture of the grinding rod due to the large-amplitude chatter during start and stop, and at the same time ensuring the machining accuracy of the workpiece.

[0018] 2. Through this device, the operator of a high-precision internal grinding machine can quickly, safely, and accurately achieve efficient vibration control of the grinding rod, and the device also has the advantages of simple structure, convenient operation, and easy maintenance.

[0019] Through the following description and in conjunction with the accompanying drawings, the present utility model will become clearer, and these drawings are used to explain the embodiments of the present utility model. Description of the drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0021] Figure 1 is a perspective view of the present utility model;

[0022] Figure 2 is a front view of the installation base;

[0023] Figure 3 Rear view of the installation base;

[0024] Figure 4 Front view of the control vibration plate.

[0025] Wherein: 1 - installation base; 11 - installation groove; 12 - arc-shaped through groove; 13 - installation pin hole; 14 - positioning screw hole; 2 - control vibration plate; 21 - grinding rod limiting groove; 22 - limiting screw hole; 23 - fixing pin hole; 3 - plug pin; 4 - limiting screw; 5 - positioning screw. Specific implementation manner

[0026] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can be a direct connection or an indirect connection through an intermediate medium, or it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] Now, embodiments of the present utility model will be described with reference to the accompanying drawings.

[0029] Embodiment

[0030] The specific implementation manner of the present utility model is as Figures 1-4 shown. A start-stop vibration control device for a long L / D ratio slender grinding rod includes a control vibration plate 2 with a vertically arranged plate surface and a long plate structure. One side of the control vibration plate 2 is vertically swingably hinged to the upper part of an installation base 1, and a grinding rod limiting groove 21 is provided at the lower edge of the other side. The installation base 1 is also provided with a limiting component capable of limiting the swing angle of the control vibration plate 2.

[0031] Before use, the mounting base 1 of the device needs to be installed on the grinding wheel dressing base of the grinding machine. During use, first rotate the control vibration plate 2, lap the grinding rod limit groove 21 on the grinding rod, and lock the swing angle of the control vibration plate 2 through the limit component, so that the control vibration plate 2 no longer swings randomly; then, start the grinding rod main shaft, and when the grinding rod chatter reaches equilibrium, loosen the limit component, rotate the control vibration plate 2 so that the grinding rod limit groove 21 is separated from the grinding rod, and complete the control of the chatter during the start-up process of the grinding rod; after that, before stopping the grinding rod main shaft, rotate the control vibration plate 2 again, lap the grinding rod limit groove 21 on the grinding rod again, and lock the swing angle of the control vibration plate 2 again through the limit component, so that the control vibration plate 2 no longer swings randomly; finally, stop the grinding rod main shaft, and when the grinding rod chatter reaches equilibrium, loosen the limit component, rotate the control vibration plate 2 so that the grinding rod limit groove 21 is separated from the grinding rod, and complete the control of the chatter during the stop process of the grinding rod.

[0032] Thus, the device can limit the grinding rod during the start-up and stop processes, thereby avoiding the instantaneous whipping phenomenon caused by the centrifugal force during the start and stop of the grinding rod, and further avoiding the fracture of the grinding rod due to the large-amplitude chatter during the start and stop, while also ensuring the machining accuracy of the workpiece.

[0033] In this device, in order to achieve the vertical swing hinge connection between the control vibration plate 2 and the upper part of the mounting base 1, the control vibration plate 2 is vertically swing hinged to the upper part of the mounting base 1 through a pin 3 vertically installed on its plate surface. Specifically, the upper part of the mounting base 1 is provided with a mounting pin hole 13 for the pin 3 to be inserted and having a clearance fit with the outer wall of the pin 3. The control vibration plate 2 is provided with a fixing pin hole 23 for the pin 3 to be inserted and having an interference fit with the outer wall of the pin 3. Through the pin 3, the hinge connection between the control vibration plate 2 and the mounting base 1 can be stably achieved, and the flexibility of the rotation of the control vibration plate 2 can be ensured.

[0034] Regarding the specific structure of the limit component, the limit component includes an arc-shaped through groove 12 extending along the swing direction of the control vibration plate 2 on the mounting base 1, and a limit screw 4 is arranged in the arc-shaped through groove 12. The screw end of the limit screw 4 is threadedly connected to the control vibration plate 2, and the nut end extends to the side of the arc-shaped through groove 12 away from the control vibration plate 2. In this embodiment, a limit screw hole 22 threadedly engaged with the limit screw 4 is provided on the plate surface of the control vibration plate 2. Through the threaded engagement between the limit screw 4 and the limit screw hole 22, the operator can adjust the magnitude of the pre-tightening force by screwing the limit screw 4, so as to adjust and lock the working angle of the control vibration plate 2. Therefore, when the control vibration plate 2 is in contact with the grinding rod, the stable support of the grinding rod can be realized by increasing the support points of the long slender grinding rod with a large length-diameter ratio, while improving the natural frequency and rigidity of the control vibration plate 2, and further effectively reducing the chatter during the start and stop processes of the grinding rod.

[0035] In addition, in order to install this device on the grinding wheel dressing base of a grinding machine, an installation groove 11 is provided on the lower surface of the installation base 1. A positioning screw 5 with its end extending vertically downward into the installation groove 11 is provided on the upper surface of the installation base 1. In this embodiment, the installation base 1 is in an "L" shape, the control vibration plate 2 is hinged at the highest point of the installation base 1, and the positioning screw 5 is arranged on the upper surface on one side of the highest point of the installation base 1. At the same time, the installation base 1 is provided with a positioning screw hole 14 through which the positioning screw 5 passes and which is in threaded cooperation with the positioning screw 5. Through the installation groove 11, the installation base 1 can be slidably installed on the guide rail of the grinding wheel dressing base of the grinding machine, so that the horizontal movement of the installation base 1 can be realized. At the same time, the staff can also lock the position of the installation base 1 by turning the positioning screw 5 to prevent it from moving randomly.

[0036] It should be noted that:

[0037] The grinding rod limiting groove 21 is a trapezoidal groove with the short side on the top, and the length of the long side of this trapezoidal groove is greater than the diameter of the grinding rod, and the length of the short side is less than the diameter of the grinding rod. Designed in this way, the two side edges of the trapezoidal groove can respectively abut against the grinding rod from two radial directions of the grinding rod, so as to effectively control the chatter generated when the grinding rod starts and stops. At the same time, by using wire cutting technology to make the grinding rod limiting groove 21 into a trapezoidal structure, it can also meet the requirements of matching with grinding rods of different outer diameter specifications, and has universality and adjustability.

[0038] In this embodiment, the grinding rod limiting groove 21 of the control vibration plate 2 and its surrounding area are made of beryllium bronze material with better wear resistance and stability, and are connected to the main body part of the control vibration plate 2 by welding means.

[0039] The usage method of this large aspect ratio slender grinding rod start-stop vibration control device specifically includes the following steps:

[0040] S1. Install the installation base 1 on the guide rail of the grinding wheel dressing base of the grinding machine and fasten it with the positioning screw 5;

[0041] S2. Install the control vibration plate 2 on the installation base 1, and pre-adjust the angle of the control vibration plate 2 through the limit screw 4. After ensuring that the trapezoidal groove of the control vibration plate 2 contacts the grinding rod, tighten the limit screw 4 to fix the angle of the control vibration plate 2;

[0042] S3. During the startup process of the grinding rod spindle, when the chatter of the grinding rod reaches equilibrium, loosen the limit screw 4 to separate the trapezoidal groove of the control vibration plate 2 from the grinding rod;

[0043] S4. When the grinding rod spindle needs to stop, adjust the angle of the control vibration plate 2 to make the trapezoidal groove of the control vibration plate 2 contact the grinding rod, and tighten the limit screw 4; after the grinding rod spindle stops rotating, then loosen the limit screw 4 to separate the trapezoidal groove of the control vibration plate 2 from the grinding rod.

[0044] The present utility model has been described in conjunction with the preferred embodiments, but the present utility model is not limited to the disclosed embodiments above, and should cover various modifications and equivalent combinations made according to the essence of the present utility model.

Claims

1. A starting, stopping and vibration control device for a slender grinding rod with a large length-diameter ratio, characterized in that, It includes a control vibration plate (2) with a vertical plate surface and a long plate structure. One side of the control vibration plate (2) is vertically swing-hinged to the upper part of a mounting base (1), and a grinding rod limiting groove (21) is provided at the lower edge of the other side. The mounting base (1) is also provided with a limiting component capable of limiting the swing angle of the control vibration plate (2).

2. The start-stop vibration control device for a slender grinding rod with a large length-diameter ratio according to claim 1, wherein The control vibration plate (2) is vertically swing-hinged to the upper part of the mounting base (1) through a pin (3) vertically installed on its plate surface. The upper part of the mounting base (1) is provided with a mounting pin hole (13) for the pin (3) to insert into and having a clearance fit with the outer wall of the pin (3).

3. The start-stop vibration control device for a slender grinding rod with a large length-diameter ratio according to claim 2, characterized in that, The control vibration plate (2) is provided with a fixing pin hole (23) for the pin (3) to insert into and having an interference fit with the outer wall of the pin (3).

4. The start-stop vibration control device for a long aspect ratio slender grinding rod according to any one of claims 1-3, characterized in that, The limiting component includes an arc-shaped through groove (12) extending along the swing direction of the control vibration plate (2) and provided on the mounting base (1). A limiting screw (4) is arranged in the arc-shaped through groove (12). The screw end of the limiting screw (4) is threadedly connected to the control vibration plate (2), and the nut end extends to the side of the arc-shaped through groove (12) away from the control vibration plate (2).

5. The start-stop vibration control device for a slender grinding rod with a large length-diameter ratio according to claim 4, characterized in that, A limiting screw hole (22) threadedly engaged with the limiting screw (4) is provided on the plate surface of the control vibration plate (2).

6. The start-stop vibration control device for a slender grinding rod with a large length-diameter ratio according to claim 1, characterized in that, A mounting groove (11) is provided on the lower surface of the mounting base (1).

7. The start-stop vibration control device for a slender grinding rod with a large length-diameter ratio according to claim 6, characterized in that, A positioning screw (5) with its screw end extending vertically downward into the mounting groove (11) is provided on the upper surface of the mounting base (1).

8. The start-stop vibration control device for a long aspect ratio slender grinding rod according to claim 7, characterized in that, The mounting base (1) is provided with a positioning screw hole (14) for the positioning screw (5) to pass through and having a threaded fit with the positioning screw (5).

9. The start-stop vibration control device for a long aspect ratio slender grinding rod according to claim 1, characterized in that, The mounting base (1) is in an "L" shape.

10. The start-stop vibration control device for a long aspect ratio slender grinding rod according to claim 1, characterized in that, The grinding rod limiting groove (21) is a trapezoidal groove with the short side on the top. The length of the long side of the trapezoidal groove is greater than the diameter of the grinding rod, and the length of the short side is less than the diameter of the grinding rod.

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