Multi-knife co-grinding straight knife grinder

Abstract

The utility model discloses a multi-knife co-grinding straight knife grinder, which comprises a knife grinder frame, a sucking disc workbench and a grinding head assembly, a blade positioning plate is arranged on one side of the sucking disc workbench, the blade positioning plate is rotatably supported on the knife grinder frame through a rotating shaft, a positioning angle limiter is arranged on the blade positioning plate, and a positioning angle is arranged on the positioning angle limiter. When the positioning angle limiter makes contact with the table top of the suction cup workbench, the included angle between the upper positioning face of the blade positioning plate and the table top is equal to the cutting edge slope angle of a to-be-ground straight knife. A plurality of corner pressing cylinders are arranged on the other side of the suction cup workbench in the length direction at intervals, the axis of a piston rod of each corner pressing cylinder is perpendicular to the workbench face of the suction cup workbench, a blade pressing plate is correspondingly installed on the piston rod of each corner pressing cylinder, and one end of each blade pressing plate enters and exits the position above the workbench face of the suction cup workbench along with rotation of the piston rod. By adopting the multi-knife co-grinding straight knife grinder, the cutting edge inclined planes of a plurality of blades can be ground at the same time when the grinding wheel is used for grinding.

Description

Technical Field

[0001] The utility model relates to a grinding machine tool, in particular to a grinding device for a sheet-shaped straight knife. Background Art

[0002] A sheet-shaped straight knife is a widely used cutting tool, which is usually in the shape of a rectangular sheet. The cutting edge of the sheet-shaped straight knife is located on one side in the width direction of the rectangular sheet. On this side, a cutting edge is formed by an edge bevel surface and one side surface of the rectangular sheet. After the side surface of the rectangular sheet is ground, the grinding of the edge bevel surface is the key to whether the sheet-shaped straight knife is sharp or not. In a conventional straight knife grinding machine, one side surface of the sheet-shaped straight knife on which the cutting edge is formed is adsorbed on the sucker workbench, and the edge bevel surface is in a horizontal state through the rotation of the sucker workbench, and the edge bevel surface is ground by the grinding wheel of the grinding machine; since the straight knife to be ground is installed and fixed by the electromagnetic suction force of the sucker workbench, only one blade can be adsorbed and fixed on the sucker workbench, so only one straight knife can be ground for the edge bevel surface when the grinding wheel grinds. In order to improve the efficiency during grinding, several blades can also be arranged in a row along the front and back direction of the sucker workbench, and the edge bevel surfaces of the blades in this row must be in the same plane, but this does not reduce the grinding time of each blade. For straight knife manufacturers with large-scale production and straight knife users with a large number of regrinds, the production efficiency is still not high. Content of the Utility Model

[0003] Aiming at the above-mentioned deficiencies existing in the prior art, the technical problem to be solved by the utility model is to provide a multi-knife co-grinding straight knife grinding machine, which can realize the simultaneous grinding of the edge bevel surfaces of multiple blades when the grinding wheel grinds.

[0004] To solve the above technical problem, a multi-knife co-grinding straight knife grinding machine of the utility model includes a grinding machine frame, a sucker workbench, and a grinding head assembly. A blade positioning plate is arranged on one side of the sucker workbench. A positioning surface is arranged on the side of the blade positioning plate opposite to the sucker workbench. The blade positioning plate is fixedly connected to a rotating shaft, and the rotating shaft is rotatably supported on the grinding machine frame. A positioning angle limiter is installed on the blade positioning plate. When the positioning angle limiter contacts the tabletop of the sucker workbench, the included angle between the positioning surface on the blade positioning plate and the tabletop is equal to the edge bevel surface angle of the straight knife to be ground; a plurality of corner pressing cylinders are installed on the other side of the sucker workbench. The corner pressing cylinders are arranged at intervals along the length direction of the sucker workbench. The axis of the piston rod on the corner pressing cylinder is perpendicular to the tabletop of the sucker workbench. A blade pressing plate is correspondingly installed on the piston rod of each corner pressing cylinder, and one end of the blade pressing plate enters and exits above the tabletop of the sucker workbench along with the rotation of the piston rod.

[0005] After adopting the above technical scheme, multiple blades can be overlapped in the up and down direction on the table top of the suction cup workbench. When the blade is clamped, the table top of the suction cup workbench can be in a horizontal state. The blade positioning plate turns to the suction cup workbench, and contacts with the table top of the suction cup workbench through the positioning angle limiter so that the required angle between the positioning surface and the table top of the suction cup workbench is obtained and maintained. The cutting edge bevels on each blade are fitted with the positioning surface on the blade positioning plate, so that the cutting edge bevels of the overlapping multiple blades can be in the same plane. At this time, the blades are staggered in the width direction of the table top of the suction cup workbench. After multiple blades are overlapped and installed on the suction cup workbench, the suction force generated by the electromagnetic suction cup of the suction cup workbench cannot guarantee that Each blade is firmly adsorbed, and may be offset from each other under the action of grinding force. For this reason, the corner pressure cylinders installed on the other side of the suction cup workbench will press the overlapping blades through the blade pressure plates, thereby ensuring that each blade is clamped firmly and reliably. When the overlapping blades are positioned, the corner pressure cylinders will drive the blade pressure plates to enter the top of the suction cup workbench and press each blade against the suction cup workbench. Under the dual action of the suction force of the electromagnetic suction cup of the suction cup workbench and the pressure of the corner pressure cylinders, the clamping of the overlapping blades is guaranteed, thereby meeting the grinding requirements and achieving the purpose of simultaneously grinding the cutting edge bevels of multiple blades during grinding of the grinding wheel.

[0006] In a preferred embodiment of the utility model, a shaft driving device is installed on the knife sharpener frame, and the shaft driving device is connected to the shaft. In this embodiment, the shaft on which the blade positioning plate is installed is driven by the shaft driving device, so that the blade positioning plate can automatically enter the positioning position state, which is convenient for realizing the automatic control of the knife sharpener.

[0007] In another preferred embodiment of the utility model, the two shaft driving devices are respectively arranged at both ends of the shaft. With this embodiment, both ends of the shaft can be driven simultaneously to ensure the stability of the position of the blade positioning plate, which is particularly suitable for the use occasions where multiple blades are installed in the length direction of the suction cup workbench.

[0008] In another preferred embodiment of the utility model, the shaft driving device is a rotary cylinder, and the output shaft of the rotary cylinder is connected to the shaft through a coupling. In this embodiment, the rotary cylinder can drive the shaft to rotate through the coupling, and after the positioning angle limiter on the blade positioning plate contacts the suction cup workbench, the positioning angle limiter on the blade positioning plate is tightly pressed against the table surface of the suction cup workbench through the air pressure of the rotary cylinder, so as to keep the position state of the blade positioning plate stable during the blade installation and positioning process.

[0009] In a further preferred embodiment of the utility model, positioning angle limiters are respectively installed at both ends of the blade positioning plate in the length direction. With this embodiment, the consistency of the angle position of the blade positioning plate in the entire length direction can be ensured.

[0010] Another further preferred embodiment of the present utility model is that the positioning angle limiter is a member with a triangular cross-section fixedly installed on the blade positioning plate. One side of the member with a triangular cross-section is a surface that fits the surface of the suction cup workbench, and another side adjacent to this side fits the positioning surface. With this embodiment, the positioning angle limiter has a simple structure. The angle between the plane that fits the positioning surface and the plane that fits the surface of the suction cup workbench on it is the angle of the edge bevel of the blade to be ground. For blades with different edge bevel angles, only the corresponding triangular member needs to be directly replaced.

[0011] Another further preferred embodiment of the present utility model is that the positioning angle limiter is a positioning angle adjusting member screwed onto the blade positioning plate. The lower end of the positioning angle adjusting member is a part that contacts the surface of the suction cup workbench, and this part is spherical. With this embodiment, by adjusting the protruding length of the positioning angle adjusting member screwed onto the blade positioning plate, the angle between the blade positioning plate and the surface of the suction cup workbench can be immediately changed, so as to meet the positioning requirements of blades with different edge bevel angles at any time, which is especially suitable for the requirements of multi-variety and small-batch production.

[0012] A further preferred embodiment of the present utility model is that one end of the blade pressing plate is fixedly connected to the piston rod of the corner pressing cylinder, and the extended end of the blade pressing plate enters above the surface of the suction cup workbench as the piston rod rotates and presses down. With this embodiment, when the extended end of the blade pressing plate enters above the surface of the suction cup workbench as the corner pressing cylinder rotates and presses down, it is used to contact and press the blade. After grinding, the blade pressing plate will rise with the piston rod and rotate out of the workbench surface, and the structure is simple.

[0013] Another further preferred embodiment of the present utility model is that the middle of the blade pressing plate is hinged to the piston rod of the corner pressing cylinder, and a pressing plate support member is provided on one side of the corner pressing cylinder. When one end of the blade pressing plate enters above the surface of the suction cup workbench as the piston rod rotates and presses down, the other end of the blade pressing plate is supported on the pressing plate support member. With this embodiment, the blade pressing plate hinged in the middle of the piston rod end will rotate and swing with the corner pressing cylinder and move up and down at the same time. When one end of it rotates with the corner pressing cylinder into the surface of the suction cup workbench and presses down the blade to be ground, the other end will be supported on the pressing plate support member. In this way, the piston rod of the corner pressing cylinder will basically only bear axial force, which is beneficial to extending the service life of the corner pressing cylinder.

[0014] A further more preferred embodiment of the present utility model is that the corner of the corner pressing cylinder is 90°. By adopting this embodiment, the length direction of the blade pressing plate entering above the suction cup workbench can be perpendicular to the length direction of the suction cup workbench, and the blade pressing plate exiting above the suction cup workbench during the work clamping process will be parallel to the length direction of the suction cup workbench. In this way, the blade to be ground will not be affected by the blade pressing plate during the clamping process, and the operation space is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The multi-knife co-grinding straight knife sharpener of the present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0016] Figure 1 is a schematic structural diagram of a specific embodiment of the multi-knife co-grinding straight knife sharpener of the present utility model in the grinding processing state;

[0017] Figure 2 is Figure 1 a sectional view taken along the line A-A of the structure shown;

[0018] Figure 3 is Figure 1 a schematic structural diagram of the blade to be ground in the installed and positioned state of the structure shown;

[0019] Figure 4 is Figure 3 a sectional view taken along the line B-B of the structure shown;

[0020] Figure 5 is Figure 1 a schematic structural diagram of another embodiment of the positioning angle limiter and the blade positioning plate of the structure shown.

[0021] In the figure: 1 - grinding machine frame, 2 - suction cup workbench, 3 - blade pressing plate, 4 - corner pressing cylinder, 5 - rotating shaft, 6 - blade positioning plate, 7 - positioning angle limiter, 8 - rotating shaft driving device, 9 - positioning surface, 10 - table surface, 11 - pressing plate support. SPECIFIC EMBODIMENTS

[0022] In Figure 1 and Figure 2In the multi-blade straight knife sharpening machine shown, the sharpening machine frame 1 is the basic supporting component of the straight knife sharpening machine, and the left and right sides above it are bed guide surfaces for supporting a grinding head assembly (not shown in the figure) to move along the length direction of the sharpening machine frame 1 for grinding. A suction cup worktable 2 is rotatably supported below between the two bed guide surfaces of the sharpening machine frame 1. The suction cup worktable 2 is usually driven by a servo motor to change its circumferential position, so as to utilize the electromagnetic suction force thereon to absorb the straight knife blade to be ground. During the clamping process of the straight knife blade to be ground, the table surface 10 of the suction cup worktable 2 is usually in a horizontal state. After clamping is completed, it is rotated at a certain angle so that the cutting edge bevel on the straight knife blade to be ground is in a horizontal state and is ground by the grinding wheel on the grinding head assembly.

[0023] See also Figure 3 and Figure 4 A blade positioning plate 6 is provided on one side of the suction cup workbench 2, and the length of the blade positioning plate 6 corresponds to the length of the suction cup workbench 2. The blade positioning plate 6 is fixedly connected to a rotating shaft 5, and the rotating shaft 5 is rotatably supported on the sharpening machine frame 1. A rotating shaft driving device 8 is installed on the sharpening machine frame 1. The two rotating shaft driving devices 8 are respectively arranged at both ends of the rotating shaft 5. The rotating shaft driving device 8 is preferably a rotary cylinder, and the output shaft of the rotary cylinder is connected to the rotating shaft 5 through a coupling transmission; the side of the blade positioning plate 6 opposite to the suction cup workbench 2 is a positioning surface 9, and a positioning angle limiter 7 is installed on the blade positioning plate 6. The two positioning angle limiters 7 are respectively installed at both ends of the length direction of the blade positioning plate 6, such as Figure 2 and Figure 4 As shown, the positioning angle limiter 7 is a member with a triangular cross section fixedly mounted on the blade positioning plate 6. One side of the member with a triangular cross section is a surface that fits with the table surface of the suction cup workbench 2, and the other side adjacent to the side fits with the positioning surface 9. The positioning angle limiter 7 can also be as follows Figure 5The structure shown is such that the positioning angle limiter 7 is a positioning angle adjusting member rotatably connected to the blade positioning plate 6. The lower end of the positioning angle adjusting member is the part that contacts the tabletop 10 of the suction cup workbench 2, and this part is spherical. When the positioning angle limiter 7 contacts the tabletop 10 of the suction cup workbench 2, the angle between the positioning surface 9 on the blade positioning plate 6 and the tabletop 10 is equal to the edge bevel angle of the straight knife to be ground. In this way, when the straight knife blade to be ground is installed and positioned on the tabletop 10 of the suction cup workbench 2 (at this time, the tabletop 10 of the suction cup workbench 2 is in a horizontal state), the rotating shaft driving device 8 drives the blade positioning plate 6 to turn towards the suction cup workbench 2 through the rotating shaft 5 so that the positioning angle limiter 7 contacts the tabletop 10 of the suction cup workbench 2, and the required angle equal to the blade edge bevel between the positioning surface 9 on the blade positioning plate 6 and the tabletop 10 of the suction cup workbench 2 will be obtained and maintained. After that, only by pushing the edge bevels of the straight knife blades stacked on top of each other towards the positioning surface 9 of the blade positioning plate 6 and fitting them, the edge bevels of the upper and lower straight knife blades can be conveniently made to be in the same plane.

[0024] See Figure 3 and Figure 4 , on the other side of the suction cup workbench 2, several corner pressing cylinders 4 are installed through a cylinder seat fixedly connected to the side of the suction cup workbench 2. The corner pressing cylinders 4 are a special type of hydraulic or pneumatic cylinder, preferably a hydraulic cylinder, which can make the piston rod rotate a certain angle in both forward and reverse directions while reciprocating axially. The corner pressing cylinders 4 are arranged at intervals along the length direction of the suction cup workbench 2. Each stack of straight knife blades corresponds to two corner pressing cylinders 4. The axis of the piston rod on each corner pressing cylinder 4 is perpendicular to the tabletop 10 of the suction cup workbench 2. A blade pressing plate 3 is correspondingly installed on the piston rod of each corner pressing cylinder 4. One end of the blade pressing plate 3 enters and exits above the tabletop 10 of the suction cup workbench 2 as the piston rod rotates, as Figure 2 and Figure 3 shown. One end of the blade pressing plate 3 is fixedly connected to the piston rod of the corner pressing cylinder 4. The extended end of the blade pressing plate 3 presses down into the space above the tabletop 10 of the suction cup workbench 2 as the piston rod rotates, pressing the straight knife blades that are overlapped and positioned by the blade positioning plate 6 towards the suction cup workbench 2, and jointly with the electromagnetic suction force of the suction cup workbench 2, clamping the mutually overlapped straight knife blades to ensure the smooth progress of the grinding process. The rotation angle of the corner pressing cylinder 4 is 90°. In this way, during the installation and positioning process of the straight knife blades, the blade pressing plate 3 installed on the piston rod of the corner pressing cylinder 4 is in a position parallel to the length direction of the suction cup workbench 2, ensuring a relatively large operating space during the installation and positioning process of the straight knife blades. The blade pressing plate 3 can also be as Figure 5As shown, its middle part is hinged to the piston rod of the corner downward pressing cylinder 4. A pressing plate support 11 is provided on one side of the corner downward pressing cylinder 4. The pressing plate support 11 is installed on the corresponding cylinder seat. When one end of the blade pressing plate 3 presses down and enters above the table surface 10 of the suction cup workbench 2 as the piston rod rotates, the other end of the blade pressing plate 3 is supported on the pressing plate support 11.

[0025] After the installation, positioning and clamping of each straight knife blade to be ground are completed, the rotating shaft driving device 8 will drive the blade positioning plate 6 to rotate in the reverse direction and separate from the suction cup workbench 2 through the rotating shaft 5. The suction cup workbench 2 rotates by a corresponding angle to make the edge inclined surface of the straight knife blade in a horizontal state, and then multi-knife co-grinding can be realized by the grinding head assembly.

[0026] Only some preferred embodiments of the present invention are listed above, but the present invention is not limited thereto, and many improvements and transformations can also be made. As long as the improvements and transformations are made on the basis of the basic principle of the present invention, they should be regarded as falling within the protection scope of the present invention.

Claims

1. A straight knife sharpening machine for multiple knives, comprising a sharpening machine frame (1), a suction cup workbench (2), and a grinding head assembly, characterized in that: A blade positioning plate (6) is provided on one side of the suction cup workbench (2), and a positioning surface (9) is provided on the blade positioning plate (6) on a side opposite to the suction cup workbench (2). The blade positioning plate (6) is fixedly connected to a rotating shaft (5), and the rotating shaft (5) is rotatably supported on the knife sharpening machine frame (1). A positioning angle limiter (7) is installed on the blade positioning plate (6). When the positioning angle limiter (7) contacts the table surface (10) of the suction cup workbench (2), the positioning surface (9) on the blade positioning plate (6) and the table surface (10) are in contact with each other. The angle between the two corner pressing cylinders is equal to the angle of the cutting edge bevel of the straight knife to be ground; a plurality of corner pressing cylinders (4) are installed on the other side of the suction cup worktable (2), and the corner pressing cylinders (4) are arranged at intervals along the length direction of the suction cup worktable (2); the axis of the piston rod on the corner pressing cylinder (4) is perpendicular to the table surface (10) of the suction cup worktable (2); a blade pressing plate (3) is correspondingly installed on the piston rod of each corner pressing cylinder (4), and one end of the blade pressing plate (3) enters and exits above the table surface (10) of the suction cup worktable (2) as the piston rod rotates.

2. The multi-blade straight knife sharpening machine according to claim 1, characterized in that: A rotating shaft driving device (8) is installed on the knife sharpening machine frame (1), and the rotating shaft driving device (8) is drivingly connected to the rotating shaft (5).

3. The multi-blade straight knife sharpening machine according to claim 2, characterized in that: The two rotating shaft driving devices (8) are respectively arranged at two ends of the rotating shaft (5).

4. The multi-blade straight knife sharpening machine according to claim 2 or 3, characterized in that: The rotating shaft driving device (8) is a rotating cylinder, and the output shaft of the rotating cylinder is connected to the rotating shaft (5) via a coupling.

5. The multi-blade straight knife sharpening machine according to claim 1, characterized in that: Positioning angle limiters (7) are respectively installed at both ends of the blade positioning plate (6) in the length direction.

6. The multi-blade straight knife sharpening machine according to claim 1 or 5, characterized in that: The positioning angle limiter (7) is a component with a triangular cross section fixedly mounted on the blade positioning plate (6); one side surface of the component with a triangular cross section is a surface that fits with the table surface of the suction cup workbench (2), and the other side surface adjacent to the side surface fits with the positioning surface (9).

7. The multi-blade straight knife sharpening machine according to claim 1 or 5, characterized in that: The positioning angle limiter (7) is a positioning angle adjusting member screwed onto the blade positioning plate (6), the lower end of the positioning angle adjusting member is a portion in contact with the table surface (10) of the suction cup workbench (2), and the portion is in the shape of a ball head.

8. The multi-blade straight knife sharpening machine according to claim 1, characterized in that: One end of the blade pressing plate (3) is fixedly connected to the piston rod of the corner pressing cylinder (4), and the extended end of the blade pressing plate (3) is pressed down into the upper part of the table surface (10) of the suction cup workbench (2) as the piston rod rotates.

9. The multi-blade straight knife sharpening machine according to claim 1, characterized in that: The middle part of the blade pressing plate (3) is hinged on the piston rod of the corner pressing cylinder (4), and a pressing plate support (11) is provided on one side of the corner pressing cylinder (4). When one end of the blade pressing plate (3) is pressed down into the top of the table surface (10) of the suction cup workbench (2) as the piston rod rotates, the other end of the blade pressing plate (3) is supported on the pressing plate support (11).

10. The multi-blade straight knife sharpening machine according to claim 1, 8 or 9, characterized in that: The turning angle of the turning downward pressing cylinder (4) is 90°.

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