RU2572916C2 - Machine for chains sharpening - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: machine contains bedplate, cutting gear, gear feeding sharpening disk for cutting with hinge joint, and gears for saw chain positioning to ensure angle of chain tooth sharpening in plan, and tooth cutting angle. There is gear for saw chain positioning to ensure angle of direction of tooth sharpening mechanically connected with said hinge joint. Gear feeding sharpening disk for cutting is made with possibility of movement in the direction perpendicular to direction of its feeding, with assurance of angle of direction of tooth sharpening.

EFFECT: chain sharpening is ensured with keeping of the angle of direction of sharpening without increasing of the machine dimensions.

5 cl, 3 dwg

Description

The invention relates to machines for sharpening saw chains and can be used at manufacturing enterprises and in everyday life.

A well-known machine for sharpening saw chains of the brand OREGON 519789, manufacturer OREGON, country of manufacture Italy. Adopted for the analogue.

The analogue, like the claimed invention, contains a bed, a feed mechanism for the grinding wheel for cutting, positioning mechanisms of the sharpened teeth for sharpening the angle of the tooth in plan, the angle of cutting of the tooth and the angle of direction of sharpening. In contrast to the claimed invention, in an analogue, the sharpening angle mechanism is a cylinder segment lying on a rotary platform, and the chain guides are located along its axis of rotation. When the cylinder segment is rotated 10 degrees, the sharpened chain also turns 10 degrees, thereby achieving the recommendations of the chain manufacturer.

The disadvantages of this machine - analogue are its large dimensions, which is due to its design (layout).

As the closest analogue, the machine for sharpening chains EG 180-C was selected. Rezer, manufacturer REZER, country of origin China, was adopted as a prototype, as it is closer in design and layout of the main mechanisms.

The prototype, like the claimed invention, contains a bed, a cutting mechanism with a grinding wheel, a feeding mechanism for the grinding wheel for cutting, positioning mechanisms of the angle of sharpening of the tooth in plan and the angle of cutting of the tooth.

The disadvantages of this prototype device include the fact that the machine does not have a mechanism for positioning the angle of sharpening direction. Therefore, when sharpening low-profile chains (0.325 inches), the recommendations of the chain manufacturer on sharpening parameters are not followed, namely, to direct tangent cutting at an angle of 10 degrees to the longitudinal horizontal plane of the chain. Failure to do so will result in damage to the chain link and the feed stop of the machine. It should be noted that it is low-profile chains that are widely used in domestic conditions.

The objective of the invention is the ability to position the angle of the sharpening direction without increasing the dimensions of the machine.

The following are technical concepts used in the description and claims:

- the direction of sharpening - the direction of movement of the cutting or in relation to the grinding wheel - this is tangent cutting,

- sharpening area - the area of the peripheral part of the grinding disc, directly processing the sharpened tooth,

- longitudinal vertical plane of the chain - a plane running along the chain perpendicular to the rivets and dividing it in half,

- the longitudinal horizontal plane of the chain - the plane is perpendicular to the longitudinal vertical plane and tangent to the upper point of the leading link of the chain,

- the angle of sharpening direction (UNZ) is the angle between the longitudinal horizontal plane of the chain and the direction of sharpening.

The problem is solved due to the fact that in the machine for sharpening chains containing a bed, a cutting mechanism, a mechanism for feeding the grinding wheel for cutting, positioning mechanisms for sharpening the teeth, such as the angle of sharpening of the tooth in plan, the angle of cutting of the tooth and the angle of direction of sharpening, the following differences:

1. when positioning the angle of the direction of sharpening, the feed mechanism of the grinding disc for cutting by means of a mechanical connection moves perpendicular to its feed direction of movement,

2. in the machine for sharpening chains, the mechanical connection is made in the form of a kinematic pair of a linear type, with the possibility of fixing in the desired position,

3. in the machine for sharpening chains, the elements of the mechanism for feeding the grinding disc for cutting are simultaneously mechanisms for positioning the angle of the sharpening direction,

4. in the machine for sharpening chains as a kinematic pair, the axis of rotation and support on the bed of the feed mechanism of the grinding wheel for cutting are used,

5. in the machine for sharpening chains, the axis of rotation of the feed mechanism of the grinding disc for cutting can move along its axis relative to the supports on the bed, while the positioning of the axis in extreme positions is limited by stoppers, and the average position by a spring-loaded ball and a recess made in the axis,

6. in the machine for sharpening chains, fixing the axis of rotation of the feed mechanism of the grinding wheel for cutting in any position is carried out by a screw.

Essential features and their functional characteristics

1. When positioning the angle of the sharpening direction, the feed mechanism of the sharpening disk for cutting through the mechanical connection moves perpendicular to its feed direction. This essential feature allows you to shift the grinding wheel so that the processing of the sharpened tooth is carried out by the grinding zone, where the tangent cutting is directed under the necessary UZ relative to the longitudinal horizontal plane of the chain.

2. In the machine for sharpening saw chains, the mechanical connection is made in the form of a kinematic pair of a linear type, with the possibility of fixing in the desired position. This essential feature allows you to determine the type of mechanical connection.

3. In the machine for sharpening saw chains, the elements of the feed mechanism of the grinding disc for cutting are simultaneously mechanisms for positioning the angle of sharpening direction. This essential feature allows the use of existing elements within the dimensions.

4. In the machine for sharpening saw chains as a kinematic pair, the axis of rotation and support on the bed of the feed mechanism of the grinding wheel for cutting are used. This essential feature allows you to determine which elements of the machine are used in mechanical connection.

5. In the machine for sharpening saw chains, the axis of rotation of the feeding mechanism of the grinding disc for cutting can move along its axis relative to the supports on the bed, while the positioning of the axis in extreme positions is limited by stoppers, and the average position by a spring ball and a recess made in the axis. This essential feature allows you to determine which elements you need to add to the design of the machine.

6. In the machine for sharpening chains, fixing the axis of rotation of the feed mechanism of the grinding wheel for cutting in any position is carried out by a screw. This essential feature allows you to determine how the axis is fixed.

Between the set of essential features of the claimed object and the achieved technical result there is a causal relationship, namely:

1. processing of the sharpened tooth is carried out by the sharpening zone, where the tangent cutting is directed under the necessary UNZ relative to the longitudinal horizontal plane of the chain. This makes it possible to comply with UNZ,

2. determine the type of mechanical connection. This makes it possible to calculate the interaction of elements,

3. use the existing elements of the machine within the dimensions. This makes it possible not to increase the dimensions of the machine,

4. determine which elements of the machine are used in mechanical connection. This allows you to make a mechanical connection,

5. allows you to determine which elements you need to add to the design of the machine. This allows you to make a mechanical connection,

6. allows you to determine which elements you need to add to the design of the machine. This allows you to make a mechanical connection.

The invention allows the sharpening of saw chains in compliance with UNZ without increasing the dimensions of the machine.

The technical nature and principle of operation of the proposed machine are illustrated by drawings, on which:

FIG. 1. The relative position of the grinding wheel and the sharpened tooth.

FIG. 2. The hinge of the feed mechanism of the grinding wheel to the depth of cut, combined with the positioning mechanism of the UNZ (horizontal section along the axis of the hinge).

FIG. 3. Machine for sharpening saw chains.

The possibility of carrying out the claimed invention is shown by the following examples.

FIG. 1. The relative position of the grinding wheel and the sharpened tooth, where 1 is the grinding wheel, 2 is the grinded tooth, 3 is the longitudinal vertical plane of the chain, 4 is the longitudinal horizontal plane of the chain, 5 is the cutting direction (tangent), 6 is the sharpening area of the left tooth, 7 - grinding zone of the right tooth, 8 - grinding zone of the prototype, 9 - guides for the chain, O - axis of rotation of the grinding wheel, B - linear displacement, b - UNZ.

FIG. 2. The hinge of the mechanism for feeding the grinding wheel to the depth of insertion combined with the positioning mechanism of the UNZ (horizontal section along the axis of the hinge) where 10 is the first support, 11 is the axis of the hinge of the mechanism for feeding the grinding wheel to the depth of penetration, 12 is the axis fixing screw, 13 is the mechanism hinge feeding the grinding wheel to the depth of cut, 14 - keyway, 15 - stopper (2 pcs.), 16 - spring-loaded ball, 17 - groove for the ball, 18 - second support, B - displacement to the left - to the right, the arrow shows that the hinge can move left - right.

FIG. 3. A machine for sharpening chains where 1 is the grinding wheel, 9 is the chain guide, 10 is the first support, 11 is the axis of the hinge of the grinding wheel feed mechanism to the depth of cut, 12 is the axis fixing screw, 13 is the hinge of the grinding wheel feed mechanism to the depth cutting, 19 - rotary platform, 20 - chain fixing screw, 21 - rotary platform fixing nut, 22 - bed, 23 - grinding wheel adjustment screw for cutting depth, 24 - cutting mechanism motor, 25 - tooth feed stop, 26 - adjustment screw thickness of the removed layer.

The positioning principle is based on the following.

FIG. 1. The relative position of the grinding wheel and the sharpened tooth. We shift the cutting zone from the grinding zone of the prototype 8 to the grinding zone 6 according to the invention, while the offset along the arc of the circumference of the grinding wheel 1 is equal to the length of the arc b (UNZ). We take the length of the arc b equal to 10 degrees, as manufacturers of low-profile chains recommend. Then, when sharpening the left tooth 2, the cutting direction (tangent) 5 will be located to the longitudinal horizontal plane of the chain 4 at an angle b. At an angle of b equal to 10 degrees, the recommendations of manufacturers of low-profile chains are followed. The right tooth is sharpened in the grinding zone 7. The value of the linear displacement B is easy to calculate, it is necessary to multiply the largest radius of the grinding wheel by the sine of angle b. With wear of the grinding wheel, the UNZ increases, but, as practice has shown, this does not affect the quality of sharpening. The guides for the chain 9 remain in place, and the grinding wheel 1 is shifted to the left - to the right.

The positioning mechanism of the UNZ is implemented as follows.

In FIG. 2 - hinge of the mechanism for feeding the grinding wheel to the depth of cut, combined with the positioning mechanism of the УЗЗ (horizontal section along the axis of the hinge). The hinge axis 11 is mounted on two supports 10 and 18 with the possibility of movement along the longitudinal axis. The longitudinal stroke of the axis 11 is limited by two stoppers 15. The middle position is set by a spring-loaded ball 16, which, falling into the groove for the ball 17, delays the longitudinal free movement of the axis 11. In the required position, the axis 11 is held by the fixing screw of the axis 12. The axis 11 is moved by hand. The size of the displacement of the axis 11 is equal to twice the value B (see Fig. 1), and the groove 17 for the spring ball 16 is made for fixation in the middle position. At the moment when the ball enters the groove, the displacement force increases sharply, so the average position is determined.

The chain sharpening machine described above is used as follows.

FIG. 3. The machine for sharpening chains. The nut 21 is loosened, the sharpened chain is installed in the guides 9. The axis 11 is loosened by the screw 12. For sharpening the left teeth by pressing the cutting mechanism motor 24, the hinge 13 is displaced to the left and locked by the screw 12, for sharpening the right teeth, it is shifted to the right. The rotary platform 19 sets the angle of sharpening of the tooth in plan and is fixed with a nut 21. The screw 23 controls the flow of the grinding wheel to the depth of cut, and the stop 25 adjusts the thickness of the layer to be removed using the screw 26. The screw 20 chain is fixed in the guides 9, the motor of the cutting mechanism 24 is turned on and the feed of the grinding wheel 1 is sharpening the tooth. The screw 20 is loosened and the next tooth is sharpened. If you want to sharpen the chain, in which the UNZ is equal to zero, then the hinge 13 is set in the middle position. To do this, when moving left to right, it is necessary at the moment when the movement force increases (see Fig. 2) from aligning the spring ball 16 with the groove on the axis for the ball 17, fix the axis 11 with the screw 12.

Claims (5)

1. A machine for sharpening saw chains, comprising a bed, a cutting mechanism, a mechanism for feeding the grinding wheel for cutting with a hinge and chain positioning mechanisms for providing a chain tooth sharpening angle in plan and a tooth cutting angle, characterized in that it is equipped with a saw chain positioning mechanism to ensure the angle of direction of the sharpening of the tooth mechanically connected with the aforementioned hinge, while the feed mechanism of the grinding wheel for cutting is made with the possibility of movement in the direction perpendicular to the direction its filing, with the provision of the angle of the direction of sharpening the tooth.  2. The machine according to claim 1, characterized in that the said mechanical connection is made in the form of a kinematic pair of a linear type with the possibility of fixing it in the desired position. 3. The machine according to claim 2, characterized in that, as a kinematic pair, the axis of the aforementioned hinge of the feed mechanism of the grinding wheel for cutting is used, which is installed in the supports of the bed. 4. The machine according to claim 3, characterized in that the axis of the hinge of the feed mechanism of the grinding wheel for cutting is installed in the supports of the bed with the ability to move along its axis, while the longitudinal stroke of the axis of the hinge is limited by stoppers, and its average position is set by a spring-loaded ball and made in hinge axis notch. 5. The machine according to p. 4, characterized in that the fixation of the said axis of the hinge in the desired position is carried out by means of a screw.

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