Belt sanding machine

Abstract

The utility model belongs to the field of mechanical processing, and relates to a belt sander, including a frame, a rotary wheel driving member, a first rotary wheel, a grinding belt, a second rotary wheel and a floating connecting member; the rotary wheel driving member is arranged on the frame; the first rotary wheel and the second rotary wheel are both arranged on the frame through a floating connecting member and move synchronously with the floating connecting member; the grinding belt is wound around the outside of the first rotary wheel and the second rotary wheel; the diameter of the second rotary wheel is smaller than the diameter of the first rotary wheel; the rotary wheel driving member is connected to the first rotary wheel and drives the first rotary wheel to rotate. The utility model provides a belt sander that can avoid interference and collision to the maximum extent in a limited space, can realize constant force flexible grinding, and is safe to use.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical processing and relates to a sanding belt machine, in particular to a grabbing type coaxial rotating force-controlled small sanding belt machine. Background Art

[0002] In the field of metal 3D printing and casting, when the surface of rough parts is polished, the automatic polishing process of the outer surface has gradually matured. However, for the polishing of the inner surface of parts, due to the spatial structure limitations of the inner surface of the parts, there is a lack of effective polishing tools, especially tools for polishing the internal annular surfaces of large and medium-sized parts. At present, most of the commonly used polishing tools are grinding head tools or abrasive belt tools. The grinding efficiency of grinding head tools is low and the consumption and wear are too fast; abrasive belt tools cannot be adjusted to the best polishing posture according to the polishing surface, and the abrasive belt cannot be tangentially contacted with the polishing arc surface, but contacts with the edges of both sides of the abrasive belt, and effective polishing cannot be achieved; and the existing pneumatic and electric polishing tools are rigid tools that rotate at high speed. The polishing speed and polishing force cannot be accurately controlled. When polishing aluminum-magnesium alloy and titanium alloy parts, the product may be damaged, accompanied by a large amount of sparks and heat, which may cause fire. Utility Model Content

[0003] In order to solve the above technical problems existing in the background technology, the utility model provides a belt sanding machine which can avoid interference and collision to the maximum extent in a limited space, can realize constant force flexible grinding and is safe to use.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A belt sander, characterized in that: the belt sander comprises a frame, a rotary wheel driving member, a first rotary wheel, a grinding belt, a second rotary wheel and a floating connecting member; the rotary wheel driving member is arranged on the frame; the first rotary wheel and the second rotary wheel are both arranged on the frame through a floating connecting member and move synchronously with the floating connecting member; the grinding belt is wound around the outside of the first rotary wheel and the second rotary wheel; the diameter of the second rotary wheel is smaller than the diameter of the first rotary wheel; the rotary wheel driving member is connected to the first rotary wheel and drives the first rotary wheel to rotate.

[0006] The movement direction of the floating connection member is not parallel to the axial direction of the frame.

[0007] The above-mentioned floating connection member includes a floating connection plate, a slide rail and a translation drive member; the slide rail is fixed at the end of the frame; the axial direction of the slide rail is not parallel to the axial direction of the frame; the floating connection plate is arranged on the slide rail; one end of the translation drive member is fixed to the frame, and the other end is connected to the floating connection plate and drives the floating connection plate to move freely on the slide rail; the first rotating wheel and the second rotating wheel are both arranged on the floating connection plate and move synchronously with the floating connection plate.

[0008] The above-mentioned translation driving member comprises a cylinder and an electric proportional valve connected to the cylinder; one end of the cylinder is fixed on the frame, and the other end is connected to the floating connecting plate.

[0009] The floating connection piece further comprises a grinding wheel floating piece; the second rotating wheel is movably arranged on the floating connection plate through the grinding wheel floating piece.

[0010] The above-mentioned grinding wheel floating part includes a grinding wheel mounting plate; a groove is provided on the floating connecting plate; the plane where the second rotating wheel is located is parallel to the plane where the grinding wheel mounting plate is located; the second rotating wheel is placed in the groove through the grinding wheel mounting plate and can move freely in the groove along the axial direction of the groove; along the moving direction of the grinding wheel mounting plate, a tensioning spring is provided between the grinding wheel mounting plate and the groove.

[0011] Baffles are arranged at both ends of the first rotating wheel along the circumferential direction of the first rotating wheel; the baffles and the first rotating wheel integrally form an embedding groove with a U-shaped cross section; the grinding belt is arranged in the embedding groove.

[0012] The first rotating wheel is provided with a hollow portion; the second rotating wheel is a rubber wheel.

[0013] The above-mentioned rotating wheel driving component includes a speed regulating motor and a universal joint coupling; the speed regulating motor is arranged on the frame; the speed regulating motor is connected to the first rotating wheel through the universal joint coupling; the speed regulating motor is an explosion-proof speed regulating motor; the universal joint coupling is retractable.

[0014] The above-mentioned belt sander also includes a quick-change disc arranged on the frame; the quick-change disc is arranged opposite to the floating connecting piece.

[0015] The advantages of the utility model are:

[0016] The utility model provides a belt sander, comprising a frame, a wheel drive, a first wheel, a grinding belt, a second wheel and a floating connection; the wheel drive is arranged on the frame; the first wheel and the second wheel are arranged on the frame through a floating connection and move synchronously with the floating connection; the grinding belt is wound around the outside of the first wheel and the second wheel; the diameter of the second wheel is smaller than the diameter of the first wheel; the wheel drive is connected to the first wheel and drives the first wheel to rotate. Due to the existence of the floating connection, the first wheel and the second wheel can conveniently move with the movement of the floating connection, and when extending into the interior of the part to be polished, the belt sander is tangent to the arc surface of the inner wall of the part, so that the sanding belt and the belt sander are coaxially rotated and polished, and interference collision is avoided to the maximum extent in a limited space. At the same time, the utility model controls the front end grinding wheel and the sanding belt to float up and down with a constant grinding force in a direction perpendicular to the grinding surface of the part through a slide rail, a cylinder, an electric proportional valve, etc., to prevent rigid collision and realize constant force flexible polishing. In addition, the utility model is driven by an explosion-proof speed regulating motor, so that the speed of the sanding belt is stable and adjustable, avoiding excessive grinding, avoiding a large number of sparks generated by high-speed rotation, and fire and other safety accidents. Moreover, the utility model is connected to the end of the robot through a robot quick-change plate, and performs high-degree-of-freedom automated grinding under the control of a six-axis robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the sanding belt machine provided by the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the belt sander provided by the utility model;

[0019] Figure 3 It is a schematic diagram of the belt sander provided by the utility model during use;

[0020] in:

[0021] 1-quick change plate; 2-frame; 3-speed regulating motor; 4-universal joint coupling; 5-floating connecting plate; 6-slide rail; 7-cylinder; 8-first rotating wheel; 9-grinding belt; 10-second rotating wheel; 11-grinding wheel mounting plate; 12-tensioning spring; 13-parts to be polished. DETAILED DESCRIPTION

[0022] See also Figure 1The utility model provides a belt sander, including a frame 2, a speed regulating motor 3, a universal joint coupling 4, a first rotating wheel 8, a grinding belt 9, a second rotating wheel 10 and a floating connection member; the speed regulating motor 3 is arranged on the frame 2; the first rotating wheel 8 and the second rotating wheel 10 are both arranged on the frame 2 through a floating connection member and move synchronously with the floating connection member; the grinding belt 9 is wound around the outside of the first rotating wheel 8 and the second rotating wheel 10; the speed regulating motor 3 is connected to the first rotating wheel 8 through the universal joint coupling 4 and drives the first rotating wheel 8 to rotate. Exemplarily, the diameter of the second rotating wheel 10 is smaller than the diameter of the first rotating wheel 8. For example, the diameter of the second rotating wheel 10 is generally 20-60mm. If the diameter is too large, the degree of fit with the curved surface of the inner wall of the part is not good, and if the diameter is too small, the rotation speed is too high, which is easy to be damaged, and the frequency and difficulty of replacement are increased; at the same time, the grinding surface of the inner wall of the part will present irregular waves due to the high-speed rotation of the second rotating wheel 10, which is easy to cause the surface of the inner wall of the part to be uneven. At the same time, the first rotating wheel 8 of relatively large size can adjust the length of the sanding belt, extend the service life of the sanding belt, and reduce the replacement frequency.

[0023] The movement direction of the floating connection is not parallel to the axial direction of the frame 2. At this time, when the floating connection moves, different positions of the part to be polished 13 can be polished and polished. Preferably, the two can be set to be perpendicular. Regardless of the direction or angle, the rotation axis direction of the grinding belt 9 can be provided to be tangentially contacted with the inner surface or outer surface of the part to be polished 13 to achieve the purpose of grinding and polishing.

[0024] See also Figure 2 The floating connection member used in the utility model includes a floating connection plate 5, a slide rail 6 and a cylinder 7; the slide rail 6 is fixed to the end of the frame 2; the axial direction of the slide rail 6 is not parallel to the axial direction of the frame 2; the floating connection plate 5 is arranged on the slide rail 6; one end of the cylinder 7 is fixed to the frame 2, and the other end is connected to the floating connection plate 5 and drives the floating connection plate 5 to move freely on the slide rail 6; the first rotating wheel 8 and the second rotating wheel 10 are both arranged on the floating connection plate 5 and move synchronously with the floating connection plate 5, that is, the floating connection plate 5 is flexibly connected to the frame 2 through the slide rail, and can move in a direction perpendicular to the grinding surface.

[0025] The speed regulating motor 3 provides rotational power to the first rotating wheel 8 through the universal joint coupling 4. Since the first rotating wheel 8 and the second rotating wheel 10 are installed on the floating connecting plate 5, and the floating connecting plate 5 is connected to the front end surface of the frame 2 through the slide rail 6, the floating connecting plate 5 can drive the first rotating wheel 8, the second rotating wheel 10 and the grinding belt 9 to move on the slide rail 6. At the same time, since the floating connecting member also includes an electrical proportional valve connected to the air circuit of the cylinder 7, when the cylinder 7 pushes the floating connecting plate 5 downward, the electrical proportional valve is used to accurately adjust the downward thrust of the cylinder 7, thereby adjusting the grinding pressure, so as to facilitate the final grinding and polishing operation through constant force downward pressure. Preferably, the slide rail 6 can be a two-parallel structure, which enhances the stability of the utility model. At the same time, there can also be two cylinders 7, and the two cylinders 7 are evenly distributed on the top of the floating connecting plate 5, which are used to smoothly link the floating connecting plate 5.

[0026] In addition, the floating connection member further comprises a grinding wheel floating member; the second rotating wheel 10 is movably arranged on the floating connection plate 5 through the grinding wheel floating member. Figure 3 The grinding wheel floating part includes a grinding wheel mounting plate 11; a groove is provided on the floating connecting plate 5; the plane where the second rotating wheel 10 is located is parallel to the plane where the grinding wheel mounting plate 11 is located; the second rotating wheel 10 is placed in the groove through the grinding wheel mounting plate 11 and moves freely in the groove along the axial direction of the groove; along the moving direction of the grinding wheel mounting plate 11, a tension spring 12 is provided between the grinding wheel mounting plate 11 and the groove. When the second rotating wheel 10 is pushed upward, the second rotating wheel 10 can be retracted upward, and the grinding belt 9 is installed at this time. After the second rotating wheel 10 is released, the grinding belt 9 is automatically tightened by rebounding under the action of the tension spring 12 at the top of the grinding wheel mounting plate 11. At the same time, the grinding belt 9 can also be replaced or tensioned by moving the second rotating wheel 10.

[0027] Baffles are provided at both ends of the first rotating wheel 8 along the circumferential direction of the first rotating wheel 8; the baffles and the first rotating wheel 8 integrally form an embedding groove with a U-shaped cross section; the grinding belt 9 is arranged in the embedding groove to prevent the grinding belt 9 from falling off during grinding. Exemplarily, the first rotating wheel 8 and the floating connecting plate 5 can both be made of aluminum alloy, and the surface thereof can be hollowed out to reduce the overall weight; the second rotating wheel 10 is a rubber wheel. Of course, the first rotating wheel 8 provided by the utility model is replaceable, for example, a first rotating wheel 8 of different diameters can be selected, the length of the grinding belt can be increased or decreased, and the use time and frequency of the grinding belt can be changed.

[0028] Exemplarily, the speed regulating motor 3 is an explosion-proof speed regulating motor, and the universal joint coupling 4 is retractable. The explosion-proof speed regulating motor is connected to the first rotating wheel of the sanding belt through a retractable universal joint to absorb the axial deviation caused by floating.

[0029] See also Figure 1The belt sander provided by the utility model also includes a quick-change disc 1 arranged on the frame 2; the quick-change disc 1 is arranged opposite to the floating connector, and the quick-change disc 1 can be quickly docked with the six-axis robot. The six-axis robot is quickly connected to the belt sander through the quick-change disc 1 at the end of the frame 2. After installing the grinding belt 9, it can not only grind the outer surface of the part 13 to be polished, but also extend into the inner side of the part 13 to be polished, and control the belt sander to coaxially rotate and polish in the inner cavity of the part 13 to be polished. The belt sander is in tangential contact with the inner surface to achieve the best polishing effect. That is, the utility model can integrate the frame 2 at the end of the six-axis robot through the quick-change disc 1, conveniently extend into the interior of the part 13 to be polished, and automatically rotate coaxially with the six-axis robot, and finally realize the polishing of the inner surface of the part 13 to be polished.

Claims

1. A belt sander, characterized in that: The sanding machine comprises a frame (2), a rotary wheel driving member, a first rotary wheel (8), a grinding belt (9), a second rotary wheel (10) and a floating connecting member; the rotary wheel driving member is arranged on the frame (2); the first rotary wheel (8) and the second rotary wheel (10) are both arranged on the frame (2) through the floating connecting member and move synchronously with the floating connecting member; the grinding belt (9) is wound around the outside of the first rotary wheel (8) and the second rotary wheel (10); the diameter of the second rotary wheel (10) is smaller than the diameter of the first rotary wheel (8); the rotary wheel driving member is connected to the first rotary wheel (8) and drives the first rotary wheel (8) to rotate.

2. The belt sander according to claim 1, characterized in that: The movement direction of the floating connection piece is non-parallel to the axial direction of the frame (2).

3. The belt sander according to claim 2, characterized in that: The floating connection member comprises a floating connection plate (5), a slide rail (6) and a translation drive member; the slide rail (6) is fixed to the end of the frame (2); the axial direction of the slide rail (6) is not parallel to the axial direction of the frame (2); the floating connection plate (5) is arranged on the slide rail (6); one end of the translation drive member is fixed to the frame (2), and the other end is connected to the floating connection plate (5) and drives the floating connection plate (5) to move freely on the slide rail (6); the first rotating wheel (8) and the second rotating wheel (10) are both arranged on the floating connection plate (5) and move synchronously with the floating connection plate (5).

4. The belt sander according to claim 3, characterized in that: The translation drive member comprises a cylinder (7) and an electric proportional valve connected to the cylinder (7); one end of the cylinder (7) is fixed on the frame (2), and the other end is connected to the floating connection plate (5).

5. The belt sander according to claim 4, characterized in that: The floating connection piece also includes a grinding wheel floating piece; the second rotating wheel (10) is movably arranged on the floating connection plate (5) through the grinding wheel floating piece.

6. The belt sander according to claim 5, characterized in that: The grinding wheel floating member comprises a grinding wheel mounting plate (11); a groove is provided on the floating connecting plate (5); the plane where the second rotating wheel (10) is located is parallel to the plane where the grinding wheel mounting plate (11) is located; the second rotating wheel (10) is placed in the groove through the grinding wheel mounting plate (11) and can move freely in the groove along the axial direction of the groove; along the moving direction of the grinding wheel mounting plate (11), a tensioning spring (12) is provided between the grinding wheel mounting plate (11) and the groove.

7. The belt sander according to any one of claims 1 to 6, characterized in that: Baffles are arranged at both ends of the first rotating wheel (8) along the circumferential direction of the first rotating wheel (8); the baffles and the first rotating wheel (8) integrally form an embedding groove with a U-shaped cross section; and the grinding belt (9) is arranged in the embedding groove.

8. The belt sander according to claim 7, characterized in that: The first rotating wheel (8) is provided with a hollow portion; the second rotating wheel (10) is a rubber wheel.

9. The belt sander according to claim 8, characterized in that: The rotating wheel driving component comprises a speed regulating motor (3) and a universal joint coupling (4); the speed regulating motor (3) is arranged on a frame (2); the speed regulating motor (3) is connected to a first rotating wheel (8) via the universal joint coupling (4); the speed regulating motor (3) is an explosion-proof speed regulating motor; and the universal joint coupling (4) is retractable.

10. The belt sander according to claim 9, characterized in that: The belt sander also includes a quick-change disc (1) arranged on the frame (2); the quick-change disc (1) is arranged opposite to the floating connection piece.

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