RU2264906C2 - Device for dressing grinding disks - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: device comprises two dressing tools which are axially aligned and secured to the ends of the flexible members. The other ends of the members are secured to the lever. The flexible members are made of flat springs provided with projections mounted on the inner surfaces that face each other. The double-sided wedge-shaped member is mounted for permitting controllable movement between the flat springs and cooperates with the projections.

EFFECT: enhanced efficiency.

4 cl, 3 dwg

Description

The invention relates to the field of grinding processing of the end surfaces of cylindrical parts, mainly to grinding processing of the ends of the rollers of roller bearings on two-side end grinding machines and the simultaneous editing of grinding wheels on these machines.

A device is known for dressing grinding wheels on surface grinding machines with a magnetic table (see processing schemes of the ends of parts on page 101, Fig. 76, Fig. A, b, c, c and d) book "Grinding metals" V.V. Loskutov, Moscow, Mechanical Engineering, 1985, the Seventh revised and revised edition). The device for dressing grinding wheels on such machines is a metal case with a ruling tool mounted on it, which is installed directly on the magnetic table of the machine. Such a device for dressing grinding wheels is unacceptable for two-sided end grinding machines.

Also known is the closest in its technical essence to the proposed device for dressing grinding wheels on two-sided end grinding machines (see AS No. 285539, IPC 24 V 53/06, published on 10/29/1970, Bull. No. 33) containing two power tools associated with a lever swinging on the shaft by means of elastic elements, while the elastic elements are two elastic legs of the power tool holder, formed by cutting it, having at one end a socket for securing the tool, setting emogo their cutting edges at opposite sides and at the other end - the projections interacting with established at the top of almazoderzhatelya adjusting elements.

The disadvantage of this device is primarily its very complex adjustment to the size of the workpiece, because it is necessary to adjust this size with four screws. When machining precision parts with double-sided face grinding machines with a tolerance of, for example, 0.02 mm, this is absolutely impossible to achieve. In addition, the adjusting elements are located in the working area of the machine, closed by the guards against the spray of coolant, and to adjust the size you still have to stop the grinding process. Misalignment of the location of diamond tools can lead to the fact that the working surfaces of the grinding wheels are not identical, as a result of which the part, passing in the movement between the wheels, can be skewed, which will lead to a distortion of its geometry (non-perpendicularity of the end face to the forming cylindrical surface of the part). These shortcomings practically do not allow using this device for dressing grinding wheels on two-sided end grinding machines in the course of processing parts.

The basis of the invention is the task of such an improvement of the device for dressing grinding wheels on two-sided end grinding machines, in which due to the coaxial installation of the cutting tools and the adjustment of the size of the workpiece outside the working area of the machine with its simultaneous simplification, it is possible to dress grinding wheels during processing parts without stopping the machine to adjust it to the size of the parts while improving accuracy and manufacturer spine treatment.

To solve this problem, in a device for dressing grinding wheels on face grinding machines containing two counter-mounted cutting tools connected with a lever swinging on the shaft by means of elastic elements, according to the invention, two cutting tools are mounted coaxially to each other and are fixed at one end of the elastic elements made in in the form of two flat springs, on the inner surfaces of which are facing each other, there are protrusions with which the adjustable longitudinal movement between the said flat springs is a two-sided wedge-shaped element, and the other ends of the flat springs are attached to the lever, while the wedge-shaped element is a two-pin fork located on mutually perpendicular axes with a shaft, the two arms of which form a two-sided wedge, the wedge-shaped element in a plane perpendicular to the plane flat springs, limited by a guide ruler placed in the groove of the wedge-shaped element, to adjust the axial movement of the wedge-shaped element it is equipped with a handwheel with a limb mounted coaxially to the wedge-shaped element, which can be tuned to a predetermined angle, the end of which interacts with the end of the wedge-shaped element facing it, it is equipped with upper and lower bars adjacent to the flat springs, with the upper bar kinematically connected with a handwheel and has a protrusion designed to limit the progress of the handwheel.

The causal relationship between the proposed set of features and the achieved technical effects is as follows.

Due to the use of flat springs for securing the ruling tools on them and providing remote (not in the working area) regulation of the distance between the two oppositely directed cutting edges of the ruling tools by placing a double-sided wedge with the possibility of longitudinal movement between these springs, it is possible to edit grinding wheels and at the same time highly accurate grinding parts, while reducing the dimensions of the control device in the direction perpendicular working planes of grinding wheels in the position of their editing. This embodiment of the device for dressing grinding wheels on a two-sided end grinding machine allows you to fully automate the grinding process on these machines, to stabilize the process as much as possible by minimizing the influence of the human factor on it, without stopping it for changeovers to the size of the workpiece, thereby increasing the productivity of dressing and quality of machined parts.

The implementation of the wedge in the form of a two-console fork and the location of the ruling tools and the interaction points of the wedge and the protrusions on the inner surfaces of the springs in one plane provides rigidity and reliability of the device.

Figure 1 shows a General view of the proposed device for dressing grinding wheels on a two-sided end grinding machine; figure 2 is a section aa in figure 1; figure 3 - section bb in figure 1.

A device for dressing grinding wheels on two-side end grinding machines contains a lever 1, rigidly mounted on the shaft 2, elastic elements 4 are fastened to the lever 1 with two screws 3 in the form of two flat springs, at one ends of which two opposing and coaxially mounted ruling tools 5 are fixed by means of they have threaded shanks and nuts 6. On the inner surfaces of the flat springs 4 facing each other, there are protrusions 7 with which a two-sided wedge 8 interacts, which can be moved Between two flat springs 4, the other ends of which are attached to the lever 1, holding it from lateral movement in one direction, while moving it in the other direction perpendicular to the first is held by a guide ruler 9, which is located in the groove of the wedge 8 (see figure 3). The working part of the wedge 8 is made in the form of a two-console faceted fork, the two consoles of which form a two-sided wedge, and the contact points of the wedge 8 with the protrusions 7 are mainly in the same plane with the cutting faces of the ruling tools 5 (see figure 2). This embodiment of the device provides the necessary rigidity and reliability. Moving the wedge 8 in the longitudinal direction to ensure the adjustment of the ruling tools 5 to size H between the working surfaces of the grinding wheels 10 in the position of their dressing thereby provides the necessary size "L" of the workpiece 11 (shown in figure 1 conditionally). For ease of assembly of the described device for dressing grinding wheels, two flat springs 4, a guide bar 9, a wedge 8, an upper bar 12 and a lower bar 13 are pre-assembled and pulled together by a screw 14. The upper bar 12 is kinematically connected with the handwheel and has a protrusion designed to limit the stroke flywheel 15 with a limb applied on it.

A device for dressing grinding wheels on a two-side end grinding machine works as follows. When during the grinding of parts 11, the working surfaces of the grinding wheels 10 wear out to a limit value (usually 1/3 ... 1/2 of the tolerance on the length of the workpieces 11), it is necessary for the grinding headstock to report longitudinal movement pulses by the amount of wear compensation for the grinding wheels 10 At the same time, the device for dressing grinding wheels is also included in the work. In this case, the lever 1 is rotated on the shaft 2, and the ruling tools 5 are moved along an arc of a circle from the periphery of the grinding wheels 10 to their center until they exit into the inner zone of the grinding wheels 10, after which the reverse is given and the lever 1 returns to its original position. The amount of compensation for wear of the grinding wheels 10 slightly exceeds the value of their actual wear, so excess abrasive is removed by editing them. This is repeated until the governing tools 5 are worn out by a limit value (this value is also approximately equal to 1/2 ... 1/3 of the tolerance for machining parts). In this case, it is necessary to compensate for the wear of the ruling tools 5 by rotating the handwheel 15 by the required angle. In this case, the wedge 8 will move forward in the direction of the ruling tools 5 and, acting on the protrusions 7, will open the flat springs 4 with the ruling tools fixed on them 5. The entire process of adjusting the size of the workpieces 11, wear compensation of the grinding wheels 10 and the ruling tools 5 is carried out in the process grinding one turn of the handwheel 15, which can be removed from the working area, as shown in the drawing (figure 1).

In addition, due to the choice of lifting at the working part of the wedge 8 and the pitch of the screw pair of the wedge 8 - handwheel 15, it is possible to obtain an arbitrarily small compensation for the wear of the grinding tool 10, which will make it possible to use the proposed device in any grinding mode, both rough and fine.

Thus, the proposed device for dressing grinding wheels on two-side end grinding machines provides the ability to dress grinding wheels in the process of high-precision machining of parts, which makes it possible to fully automate the process, increase its stability, almost completely eliminate the influence of the human factor on it and, as a result, increase productivity processing with a significantly simpler and more reliable design.

Claims (5)

1. A device for dressing grinding wheels on face grinding machines, containing two counter-mounted ruling tools associated with a lever swinging on the shaft by means of elastic elements, characterized in that the two ruling tools are mounted coaxially to each other and are fixed at one end of the elastic elements, made in the form two flat springs, on the facing inner surfaces of which there are protrusions with which interacts having the possibility of adjustable longitudinal movement between the aforementioned flat springs sided wedge member and the other ends of leaf springs attached to a lever. 2. The device according to claim 1, characterized in that the wedge-shaped element is a two-pin plug located on mutually perpendicular axes with a shaft, the two consoles of which form a two-sided wedge. 3. The device according to claim 1, characterized in that the wedge-shaped element in a plane perpendicular to the plane of the location of the flat springs is limited by a guide ruler placed in the groove of the wedge-shaped element. 4. The device according to claim 1, characterized in that for adjusting the axial movement of the wedge-shaped element, it is equipped with a handwheel with a limb mounted coaxially to the wedge-shaped element, which can be tuned to a predetermined angle, the end of which interacts with the end face of the wedge-shaped element. 5. The device according to claim 1 or 3, characterized in that it is provided with upper and lower bars adjacent to the flat springs on two opposite sides, the upper bar being kinematically connected with the handwheel and has a protrusion designed to limit the flywheel.

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