Constant-pressure grinding and overload protection device for wide abrasive belt

Abstract

The utility model relates to a constant-pressure grinding and overload protection device for a wide abrasive belt. The constant-pressure grinding and overload protection device comprises a grinding abrasive frame, a back pressure roller, a supporting seat, a hinged support and a constant-pressure air cylinder, the grinding sand frame and the back pressure roller are oppositely arranged, the grinding sand frame is used for grinding the surface of one side of a workpiece, the back pressure roller is used for supporting the surface of the other side of the workpiece, the back pressure roller is rotationally connected between the supporting seats at the two ends, one side of each supporting seat is fixedly connected with a rack through the hinged support, and the other side of each supporting seat is fixedly connected with the rack through the hinged support. And the other side of the supporting seat is fixedly connected with the rack through the constant-pressure air cylinder, and the constant-pressure air cylinder is configured to be controlled to apply pressure to the supporting seat, so that the back pressure roller keeps constant pressure to the workpiece. The grinding pressure of the ultra-thin plate is constant, and the protection problem when two plates enter by mistake is solved, so that the grinding uniformity of the plate surface is ensured, and meanwhile, the abrasive belt is effectively protected and is prevented from bursting.

Description

Technical Field

[0001] The utility model relates to the field of sanding and grinding, in particular to a wide-width sanding belt constant-pressure grinding and overload protection device. Background Art

[0002] Wide-band grinding is widely used in the surface processing of plates and strips due to its high processing efficiency, processing accuracy and high surface finish. In the artificial board and furniture industry, grinding is divided into fixed thickness grinding and constant pressure grinding. Fixed thickness grinding is mostly used for grinding of density boards, particle boards and multi-layer plywood. After grinding, the thickness accuracy of the finished workpiece is required to be high. Constant pressure grinding means that the abrasive belt always maintains a constant grinding force (i.e. contact pressure) with the workpiece during the grinding process. It is suitable for uniform roughening grinding of the back plate of fireproof board in the furniture decoration industry, surface polishing of veneer decorative ultra-thin boards, etc.

[0003] If a fixed-thickness grinding structure is used to polish the surface of an ultra-thin plate, excessive sanding may cause sand penetration on the plate surface, or insufficient grinding may cause sand leakage, and the plate surface quality may not meet the requirements.

[0004] At present, constant pressure grinding uses rubber sand rollers for grinding, and the deformation of the rubber is used to compensate for the change in pressure. This method is suitable for thicker workpieces.

[0005] Some also use airbag grinding pad polishing, or rubber soft pad grinding pad polishing, which is also suitable for thicker workpieces, and the thickness accuracy is unstable. Utility Model Content

[0006] The utility model is proposed to solve the problem of pressure change caused by abrasive loss and uneven thickness of the workpiece itself. The utility model can also release and protect two ultra-thin plates from mistakenly entering the grinding area, effectively protecting the sanding belt and preventing the sanding belt from bursting.

[0007] In order to achieve the above-mentioned purpose of the utility model, an embodiment of the utility model provides a wide-width abrasive belt constant-pressure grinding and overload protection device, including a grinding sand frame, a back-pressure roller, a support seat, a hinge support and a constant-pressure cylinder; the grinding sand frame and the back-pressure roller are arranged opposite to each other, the grinding sand frame is used to grind one side surface of the workpiece, and the back-pressure roller is used to support the other side surface of the workpiece, the back-pressure roller is rotatably connected between the support seats at both ends, one side of the support seat is connected and fixed to the frame through the hinge support, and the other side of the support seat is connected and fixed to the frame through the constant-pressure cylinder, and the constant-pressure cylinder is configured to apply pressure to the support seat in a controlled manner so that the back-pressure roller maintains a constant pressure on the workpiece.

[0008] Furthermore, it also includes: a reference fine-tuning mechanism, which is arranged between the support seat and the constant-pressure cylinder and is used to adjust the reference position of the counter-pressure roller when it falls.

[0009] Furthermore, it also includes: a cleaning roller, which is arranged on one side of the back-pressure roller, and the cleaning roller has bristles that are in contact with the back-pressure roller and are used to clean the back-pressure roller.

[0010] Furthermore, it also includes: a cleaning fine-adjustment mechanism, which is movably connected to the cleaning roller and is used to keep the relative position between the cleaning roller and the back-pressure roller fixed.

[0011] Furthermore, it also includes: a sanding belt, which is arranged on the grinding sand frame and is used for grinding the workpiece.

[0012] Furthermore, the counter-pressure roller is a rubber-coated roller.

[0013] Furthermore, the hardness of the counter-pressure roller is 80 degrees Shore.

[0014] The wide-width abrasive belt constant pressure grinding and overload protection device of the embodiment of the utility model always maintains a constant pressure during the workpiece grinding process. During abrasive belt grinding, when the abrasive grains contact the workpiece at a certain speed and pressure, the abrasive grain surface is also worn while cutting material from the workpiece, and the material removal rate, wear rate, and workpiece quality of the abrasive belt will also change accordingly. The utility model solves the pressure changes caused by abrasive grain loss and uneven thickness of the workpiece itself, and at the same time releases and protects two ultra-thin plates from mistakenly entering the grinding area, effectively protecting the abrasive belt and preventing the abrasive belt from bursting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a wide-width abrasive belt constant-pressure grinding and overload protection device according to an embodiment of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of a wide-width abrasive belt constant-pressure grinding and overload protection device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The description of the embodiments of this specification should be combined with the corresponding drawings, which should be considered as part of the complete specification. In the drawings, the shape or thickness of the embodiments may be enlarged and indicated for simplification or convenience. Furthermore, the parts of each structure in the drawings will be described separately. It is worth noting that the elements not shown in the drawings or not described in words are in a form known to ordinary technicians in the relevant technical field.

[0019] The description of the embodiments herein and any reference to directions and orientations are only for the convenience of description and are not to be construed as any limitation on the scope of protection of the present invention. The following description of the preferred embodiments may involve combinations of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0020] like Figure 1 and Figure 2 As shown, the wide-width abrasive belt constant pressure grinding and overload protection device of the embodiment of the utility model includes a grinding sand frame 1, a back-pressure roller 2, a support seat 3, a hinge support 4, a constant pressure cylinder 5, a reference fine-tuning mechanism 6, a cleaning roller 7, a cleaning fine-tuning mechanism 8, an abrasive belt 9 and a workpiece 10.

[0021] When the workpiece 10 is ground by the device, the grinding sand frame 1 grinds the bottom surface of the workpiece 10 through the sand belt 9, and the back pressure roller 2 is used to support the back surface of the workpiece 10 to obtain a certain grinding pressure. The back pressure roller 2 is relatively rotated in the support seat 3 on both sides. The back pressure roller 2 with driving force is more conducive to the introduction of the ultra-thin workpiece 10 to prevent arching, wrinkling, etc. The back pressure roller 2 can be a rubber-coated roller with a rubber hardness of 80 degrees Shore to adapt to the unevenness of the workpiece to achieve uniform sanding of the board surface. The support seat 3 at both ends of the back pressure roller 2 is a rotating type, one side is hinged and fixed to the frame through a hinge support 4, and the other side is hinged and fixed to the frame through a constant pressure cylinder 5. The force of the back pressure roller 2 to support the workpiece 10 is set by the pressure regulation of the constant pressure cylinder 5 and the air circuit protection circuit. After setting, the workpiece is ground by always maintaining a constant pressure. When two ultra-thin workpieces mistakenly enter the grinding area, the back pressure roller 2 can continue to lift to let them pass, preventing the grinding pressure from overloading and tearing the sand belt 9. A reference fine-tuning mechanism 6 is provided under the support seat 3 on one side of the constant pressure cylinder 5, which can quickly and accurately adjust the reference position of the counter-pressure roller 2 when it falls. A fast-rotating cleaning roller 7 and a cleaning fine-tuning mechanism 8 are provided next to the counter-pressure roller 2, which are used to clean the surface of the counter-pressure roller 2 in real time to ensure the smoothness of the grinding reference. The cleaned frosted dust is sucked away through the centralized dust removal pipeline. The cleaning fine-tuning mechanism 8 is used to quickly compensate and adjust the position of the cleaning roller brush after wear to ensure the effectiveness of cleaning the surface of the counter-pressure roller 2.

[0022] The wide-width abrasive belt constant-pressure grinding and overload protection device of the utility model realizes constant grinding pressure for ultra-thin plates, solves the protection problem when two plates enter by mistake, thereby ensuring the uniformity of plate surface grinding, and effectively protects the abrasive belt to prevent it from bursting.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wide belt constant pressure grinding and overload protection device, characterized in that: It comprises a grinding sand frame (1), a counter-pressure roller (2), a support seat (3), a hinge support seat (4) and a constant pressure cylinder (5); The grinding frame (1) and the back pressure roller (2) are arranged opposite to each other. The grinding frame (1) is used for grinding the surface of one side of the workpiece (10), and the back pressure roller (2) is used for supporting the surface of the other side of the workpiece (10). The back pressure roller (2) is rotatably connected between the support seats (3) at both ends. One side of the support seat (3) is connected and fixed to the frame through the hinge support (4), and the other side of the support seat (3) is connected and fixed to the frame through the constant pressure cylinder (5). The constant pressure cylinder (5) is configured to controllably apply pressure to the support seat (3) so that the back pressure roller (2) maintains a constant pressure on the workpiece (10).

2. The wide belt constant pressure grinding and overload protection device according to claim 1 is characterized in that: It also comprises a reference fine-tuning mechanism (6), which is arranged between the support seat (3) and the constant-pressure cylinder (5) and is used to adjust the reference position of the counter-pressure roller (2) when it falls.

3. The wide belt constant pressure grinding and overload protection device according to claim 1 is characterized in that: It also comprises a cleaning roller (7), which is arranged on one side of the back-pressure roller (2), and has bristles on the cleaning roller (7) which are in contact with the back-pressure roller (2) and are used to clean the back-pressure roller (2).

4. The wide belt constant pressure grinding and overload protection device according to claim 3 is characterized in that: It also comprises a cleaning fine-adjustment mechanism (8), which is movably connected to the cleaning roller (7) and is used to keep the relative position between the cleaning roller (7) and the back-pressure roller (2) fixed.

5. The wide belt constant pressure grinding and overload protection device according to claim 1 is characterized in that: It also comprises a sanding belt (9), wherein the sanding belt (9) is arranged on the grinding frame (1) and is used for grinding the workpiece (10).

6. The wide belt constant pressure grinding and overload protection device according to any one of claims 1 to 5, characterized in that: The counter-pressure roller (2) is a rubber-coated roller with a hardness of 80 degrees Shore.

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