Automatic sharpening machine for curved cutting edges, primarily of cutter knives

Abstract

FIELD: knife sharpening.SUBSTANCE: invention relates to an automatic machine for sharpening curved cutting edges of a knife. The machine comprises a housing, a knife drive, a knife holder, a knife mounting table, a grinding block with a grinding tool and a sensor for detecting contact of the grinding tool with the knife blade being sharpened, a system for supplying lubricating and cooling liquid, a control panel and an automatic cleaning module. The automatic cleaning module includes a brush with a jet of cleaning liquid, installed above the surface of the knife mounting table. The knife mounting table is made with a barrier wall located on the side opposite to the direction of the cleaning liquid stream, and with holes for draining the cutting fluid and cleaning liquid. The machine control panel is configured to control modules that provide operation in automatic mode, operation in manual mode, and operation in washing mode.EFFECT: level of contamination of the sensors inside the machine body is reduced.1 cl, 3 dwg

Description

[0001] Field of technology to which the invention relates

[0002] The invention relates to a machine for sharpening rotary knives used for machine separation of food products, made in the form of circular or sickle-shaped knives, and can be used for sharpening knives of meat processing machines, such as mincers, cutters and the like, as well as for sharpening knives of machines for slicing food products.

[0003] Technology Level

[0004] A copy sharpening machine is known, described in patent RU 2332336 C1, B24B 3 / 40, published on April 20, 2008. The machine comprises a table on which the processing tool is mounted, a template defining the tool's trajectory, and a drive in the form of an electric motor. This machine does not provide the required sharpening quality and has limited functionality. For example, it cannot resharpen knives that have already lost their edge during use, and there is no grinding mechanism.

[0005] Also known is a grinding machine with a device for grinding knives, described in patent DE 3617523 A1, 24B 3 / 40, published 11.12.1986.The invention relates to a grinding machine with a control device for sharpening crown knives, in particular cutter knives, in which the knife is fixed on a holding plate, which is adjustable mounted on a lifting lever and can rotate back and forth around the axis of a support pin fixed on the lifting lever, and in which the lifting lever makes lifting movements in both directions perpendicular to the rotating grinding surface during grinding, so that the edge of the knife rolls over the grinding surface, creating grinding zones, the sharpening angles of which determine the contour of the crown profile, and in which, in addition, the stroke size and the stroke frequency can be determined by controlling a servomotor, which drives the lifting spindle, and the grinding zones are overlapped by the reciprocating movement of the holding plate with the knife.

[0006] This controlled grinding machine has gained recognition in the specialized industry due to its design and functional advantages. This is due, in particular, to the fact that the crown grinding control device replaces previously uncertain, intuitive, and customized grinding with semi-automated control of functions, which in itself ensures precise grinding of crowns in a shorter time and at a specified sharpening angle.

[0007] However, as practice has shown, a disadvantage is that each change to the set cutting angle requires reconfiguring the functions or adjusting the controls. These so-called semi-automatic or automatic knife sharpening devices can only sharpen knives of a specific shape and are not suitable for sharpening knives with variable radii, such as sickle-shaped cutter knives.

[0008] The closest one, accepted as a prototype, is the Sharpening machine for a rotating blade used in food machines, described in patent DE 102005013363 B4, B24B 3 / 36; B24B 3 / 44; B24B 3 / 46, published on 08.12.2005. The machine contains

[0009] Housing, knife drive, knife holder, knife mounting table, grinding unit, including a sensor for detecting contact between the grinding tool and the blade being sharpened, coolant supply system, and control panel. The main drawback of the well-known automatic cutter blade sharpening machine is that the location of the sensors in the coolant splash zone and the lack of a cleaning system for the machine's interior reduce sharpening performance due to the need to stop the process to clean the sensors.

[0010] Disclosure of the essence of the invention

[0011] To solve the specified technical problem in a known automatic machine for sharpening cutter knives, comprising a housing, a knife drive, a knife holder, a knife mounting table, a grinding unit, including a sensor for detecting contact of the grinding tool with the blade being sharpened, a coolant supply system and a control panel, it is proposed to introduce an automatic cleaning module, including a brush with a supply of cleaning liquid, installed above the surface of the knife mounting table, wherein the knife mounting table has a barrier wall located on the side opposite to the direction of the stream of cleaning liquid, and a drain hole, and the control of the module is output to the control panel of the machine.

[0012] Brief description of drawings

[0013] The drawings show a schematic representation of an embodiment of the control device according to the invention. Since the structural details of the corresponding grinding machine are known, the illustration is limited to the main units deemed necessary to explain the invention. Figure 1 shows a general view of the machine without the front housing wall; Figure 2 shows the knife mounting table with a barrier wall and drainage holes for the cutting fluid and cleaning agent; Figure 3 shows a fragment of the circuit diagram of the automatic cleaning module protection.

[0014] Implementation of the invention

[0015] The claimed invention can be implemented as follows. Inside the housing 1, a knife mounting table 3 is installed in the form of a metal sheet with a flange 15 on the corresponding side. A knife drive 2 is attached to the table 3 from below, and a knife holder 4 is attached to the table 3 from above, on which a knife 5 to be sharpened is installed. In the upper part of the housing 1, a grinding block 6 is installed, as well as a polishing block 7 and a burr removal block 8. A tray 9 is provided for draining the used cutting fluid. A signal from the contact sensor of the grinding tool with the blade to be sharpened (not shown) is sent to the control panel 10, which is a control action for the knife drive 2. The software control provides three different programs: for operation in automatic mode - module 14, for operation in manual mode - module 17 and for operation in washing mode - module 16.Safety control module 24 is connected to protective cover 21 in cleaning mode, responding to air pressure sensor 22 in the line. Such a device, characterized by the combination of essential features of the formula, is unknown in the prior art and allows for the creation of an automatic sharpening machine with an automatic cleaning function for the working area, thereby increasing the machine's productivity.

Claims

An automatic machine for sharpening curved cutting edges of a knife, comprising a housing, a knife drive, a knife holder, a knife mounting table, a grinding block with a grinding tool and a sensor for detecting contact of the grinding tool with the knife blade being sharpened, a system for supplying a lubricating and cooling liquid and a control panel, characterized in that it is equipped with an automatic cleaning module, including a brush with a supply of a jet of washing liquid, installed above the surface of the knife mounting table, wherein the knife mounting table is made with a barrier wall located on the side opposite to the direction of the jet of washing liquid, and with holes for draining the lubricating and cooling liquid and the washing liquid, and the control panel of the machine is made with the possibility of controlling modules that ensure operation in automatic mode, operation in manual mode and operation in washing mode.

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