Polishing device

Abstract

The polishing device comprises a sleeve rod and a grinding wheel, the sleeve rod can rotate along the axis of the sleeve rod, the sleeve rod comprises an extending part, the grinding wheel is located on the radial outer side of the extending part, the grinding wheel can be close to or away from the circumferential outer wall of the extending part in the radial direction of the extending part, the grinding wheel can move in the axial direction of the extending part, and the extending part is used for installing a workpiece. The workpiece is sleeved with the extending part, the inner circumferential wall of the workpiece is attached to the outer circumferential wall of the extending part, the grinding wheel is close to the workpiece and abuts against the workpiece at the P point, the tangential direction of the grinding wheel at the P point is parallel to the axial direction of the extending part, and when the grinding wheel rotates, the acting force generated by the grinding wheel at the P point to the workpiece is in the direction where the workpiece breaks away from the extending part; the sleeve rod is provided with a runner, the workpiece comprises a first end face, the interior of the runner is in a negative pressure state, and the first end face seals one axial end of the runner. The utility model provides a polishing device which avoids indentation and improves surface quality.

Description

Technical Field

[0001] This utility model relates to the field of polishing technology, and more specifically, to a polishing device. Background Technology

[0002] Currently, a cylindrical sleeve product has an opening at one axial end and an end face at the other axial end. During the polishing operation of its circumference, it is fitted into a mandrel, and a limiting component is used to hold its end face in place, thereby preventing it from moving during polishing with a grinding wheel. However, since the end face of this sleeve product is the outer wall surface when it is being held in place, it is prone to pressure marks, which can affect the surface quality of the product. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a polishing device that avoids indentation and improves surface quality.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a polishing device, including a sleeve rod and a grinding wheel. The sleeve rod is rotatable along its own axis. The sleeve rod includes an extension portion. The grinding wheel is located radially outside the extension portion. The grinding wheel is rotatable radially towards or away from the circumferential outer wall of the extension portion, and the grinding wheel is axially movable along the extension portion. The extension portion is used to install a workpiece. The workpiece is fitted into the extension portion, and the inner circumferential wall of the workpiece fits against the outer circumferential wall of the extension portion. The grinding wheel approaches the workpiece and abuts against the workpiece at point P. The tangent direction of the grinding wheel at point P is parallel to the axial direction of the extension portion. When the grinding wheel rotates, the force exerted by the grinding wheel on the workpiece at point P is along the direction in which the workpiece leaves the extension portion. The sleeve rod is provided with a flow channel. The workpiece includes an end face. The flow channel is under negative pressure. The end face closes one end of the flow channel axially.

[0005] The present invention is further configured such that the flow channel is coaxial with the sleeve rod, one end face is perpendicular to the flow channel axis, one end face is in contact with the end face of the extension, and the flow channel passes through the end face of the extension.

[0006] The present invention is further configured such that an air pipe is installed on the side of the flow channel away from the extension, and a negative pressure generating device is connected to the air pipe.

[0007] The present invention is further configured such that the sleeve rod has a stepped surface, and the workpiece includes an end face two, which abuts against the stepped surface.

[0008] The present invention is further configured to include a driving component, which is connected to a gear pair, and the gear pair is connected to a sleeve rod to drive the sleeve rod to rotate.

[0009] The present invention is further configured to include a fixed seat, with the sleeve inserted into the fixed seat and the sleeve connected to the fixed seat via a bearing.

[0010] The present invention is further configured such that the inner diameter of the end face is smaller than the outer diameter of the stepped surface.

[0011] In summary, this utility model has the following beneficial effects:

[0012] 1. After the workpiece is inserted into the sleeve rod, the inner wall surface of the workpiece is held in place by negative pressure, thereby avoiding the pressure on the outer wall surface of the workpiece and improving the surface quality of the workpiece.

[0013] 2. When the grinding wheel rotates, the force exerted by the grinding wheel on the workpiece at point P is along the direction of the workpiece separating from the extension, which reduces the force between end face one and the upper end face of the extension, thereby reducing the stress deformation of end face one. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of an embodiment;

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0016] Reference numerals: sleeve 1, flow channel 11, air pipe 111, extension 12, stepped surface 13, driving component 2, gear pair 21, grinding wheel 3, workpiece 4, end face 1 41, end face 2 42, fixed seat 5, bearing 51. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1 , Figure 2 As shown, this embodiment discloses a polishing device, including a sleeve rod 1, which is rotatable along its own axis and has a cylindrical structure. A fixed seat 5 is installed at the bottom of the sleeve rod 1, and the sleeve rod 1 is inserted into the fixed seat 5. The sleeve rod 1 and the fixed seat 5 are connected by a bearing 51. A gear pair 21 is connected to the sleeve rod 1, and the gear pair 21 is driven by a driving component 2. The driving component 2 is electrolytic, and the sleeve rod 1 rotates under the action of the driving component 2.

[0019] The sleeve rod 1 is provided with a flow channel 11, which is coaxial with the sleeve rod 1 and extends through the sleeve rod 1 axially. An air pipe 111 is installed at the bottom of the flow channel 11, and a negative pressure generating device is connected to the air pipe 111 to enable a negative pressure state to be formed in the flow channel 11.

[0020] like Figure 1 , Figure 2As shown, the sleeve rod 1 includes an extension 12 located at the top. The extension 12 is a cylindrical structure with an outer diameter smaller than that of the sleeve rod 1. The sleeve rod 1 has a stepped surface 13, the outer diameter of which is larger than that of the extension 12. The extension 12 is used to install a workpiece 4. The workpiece 4 has a cylindrical structure with an opening at one axial end. The workpiece 4 is inserted into the extension 12 with the opening facing downwards, and the inner circumferential wall of the workpiece 4 fits against the outer circumferential wall of the extension 12. The workpiece 4 includes an end face 41 and an end face 42 located at both axial ends. The end face 42 abuts against the stepped surface 13, and the inner diameter of the end face 42 is smaller than the outer diameter of the stepped surface 13. By having the end face 42 abut against the stepped surface 13, the entry of external gas into the flow channel 11 is reduced, thereby ensuring a negative pressure effect within the flow channel 11. Under negative pressure, end face 41 is pressed against the upper end face of extension 12 and held in place by external air pressure. End face 41 is perpendicular to the axis of flow channel 11 and seals the upper end of flow channel 11 to prevent workpiece 4 from easily detaching from extension 12. There may be a small gap between end face 41 and the upper end face of extension 12 to ensure that end face 42 abuts against step surface 13.

[0021] like Figure 1 As shown, the grinding wheel 3 is located radially outside the extension 12. Driven by the driving device, the grinding wheel 3 can move radially closer to or further away from the outer wall of the extension 12. The grinding wheel 3 can also move axially along the extension 12. After the grinding wheel 3 rotates, it polishes the outer wall of the workpiece 4.

[0022] like Figure 2 As shown, the grinding wheel 3 approaches the workpiece 4 and abuts against the workpiece 4 at point P. The tangential direction of the grinding wheel 3 at point P (i.e., Figure 2 The direction of the middle arrow Q is parallel to the axis of the extension 12. When the grinding wheel 3 rotates, the force exerted by the grinding wheel 3 on the workpiece 4 at point P is along the direction of the workpiece 4 away from the extension 12 (i.e., Figure 2 (In the upward direction), the force between end face 41 and the upper end face of extension 12 is reduced, thereby reducing the stress deformation of end face 41.

[0023] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A polishing apparatus, characterized in that, Includes a sleeve (1) and a grinding wheel (3). The sleeve (1) is rotatable along its own axis. The sleeve (1) includes an extension (12). The grinding wheel (3) is located radially outside the extension (12). The grinding wheel (3) is rotatable radially towards or away from the circumferential outer wall of the extension (12), and the grinding wheel (3) is axially movable along the extension (12). The extension (12) is used to mount a workpiece (4). 4) The extension (12) is fitted into the workpiece (4), the inner peripheral wall of the workpiece (4) is in contact with the outer peripheral wall of the extension (12), the grinding wheel (3) is close to the workpiece (4) and abuts against the workpiece (4) at point P, the tangent direction of the grinding wheel (3) at point P is parallel to the axial direction of the extension (12), when the grinding wheel (3) rotates, the force exerted by the grinding wheel (3) on the workpiece (4) at point P is along the direction in which the workpiece (4) moves away from the extension (12); The sleeve (1) is provided with a flow channel (11), and the workpiece (4) includes an end face (41). The flow channel (11) is under negative pressure, and the end face (41) closes one end of the flow channel (11) axially.

2. The polishing apparatus according to claim 1, characterized in that, The flow channel (11) is coaxial with the sleeve (1), the first end face (41) is perpendicular to the axial direction of the flow channel (11), the first end face (41) is in contact with the end face of the extension (12), and the flow channel (11) passes through the end face of the extension (12).

3. The polishing apparatus according to claim 1, characterized in that, An air pipe (111) is installed on the side of the flow channel (11) away from the extension (12), and the air pipe (111) is connected to a negative pressure generating device.

4. The polishing apparatus according to claim 1, characterized in that, The sleeve (1) has a stepped surface (13), and the workpiece (4) includes an end face (42), which abuts against the stepped surface (13).

5. A polishing apparatus according to claim 1, characterized in that, It also includes a drive component (2), which is connected to a gear pair (21), which is connected to the sleeve rod (1) to drive the sleeve rod (1) to rotate.

6. The polishing apparatus according to claim 1, characterized in that, It also includes a fixed seat (5), into which the sleeve (1) is inserted, and the sleeve (1) and the fixed seat (5) are connected by a bearing (51).

7. A polishing apparatus according to claim 4, characterized in that, The inner diameter of the second end face (42) is smaller than the outer diameter of the stepped surface (13).

Images