CN103978408A - Off-machine pre-adjusted circular arc-shaped centreless supporter for bearing grinders - Google Patents

Abstract

An off-machine pre-adjusted circular arc-shaped centreless supporter for bearing grinders comprises a base, an L-shaped plate and an off-machine pre-adjusting mechanism, the L-shaped plate and the off-machine pre-adjusting mechanism are fixed on the base, and the off-machine pre-adjusting mechanism is positioned by positioning bolts on the L-shaped plate and fixedly mounted on the L-shaped plate. The off-machine pre-adjusted circular arc-shaped centreless supporter is fixed by the included angle between guide ways of a left circular arc-shaped support guide block and a right circular arc-shaped support guide block, meanwhile, the off-machine pre-adjusting mechanism is adopted to carry out off-machine adjustment and positioning, and therefore the positioning precision is high; because the conventional design method that supports can rotate is changed, the rigidity of the supports is increased, the scratches of the supports are reduced, abrasion is decreased, and thereby the frequency of adjustment is decreased; moreover, because off-machine pre-adjustment is adopted, grinding precision can be increased, and grinding efficiency can be greatly increased.

Description

A centerless support device for external pre-adjusting circular arc of a bearing grinder

technical field

The invention relates to a centerless support device for a bearing grinder, in particular to a centerless support device for external preset arcs of a bearing grinder.

Background technique

In rolling bearing processing, grinding equipment is the key equipment in each process, accounting for more than 60% of the entire production labor. Bearing rings are typical disk and ring parts, especially suitable for mass production, while electromagnetic centerless fixtures have the following characteristics: 1. High repeat positioning accuracy; 2. High-efficiency self-positioning; 3. No clamping deformation; 4. The radial and axial runout of the main shaft is not 1:1 to transmit the processing error; 5. It is easy to load and unload the workpiece, which is convenient for automatic production; so it is widely used in the field of rolling bearing grinding.

During the grinding process of bearing rings, the precision requirements are very high, and the centering and pressing of ordinary machine tools can no longer meet the precision requirements of bearing grinding. Therefore, in advanced CNC bearing grinding machines, electromagnetic centerless fixture structures are generally used. Grinding method.

The electromagnetic centerless fixture is composed of a fixture seat, an electromagnetic coil, a magnetic pole, and a centerless support. An electromagnetic coil is installed on the outer side of the rotating shaft at the front end of the workpiece shaft, and a magnetic pole is installed on the end surface of the front end of the workpiece shaft. During the grinding process, the electromagnetic coil is energized, and the generated magnetic force attracts the workpiece to the magnetic pole, so that the workpiece is on the workpiece shaft and the support. Under the action, it rotates around its own center of rotation.

Under the action of the support, the center of rotation of the workpiece deviates from the center of rotation of the workpiece shaft, that is, there is a certain distance between the two centers of rotation, that is, the eccentricity. Due to the eccentricity and eccentric direction, the outer surface of the workpiece can be reliably positioned on the centerless support surface. the

Contents of the invention

The purpose of the present invention is to solve the problems of low positioning and support accuracy, low support rigidity, and many adjustment times of the previous support device, and provide a kind of centerless support device with pre-adjusted arc outside the bearing grinding machine. The present invention uses the left arc to support the guide block and The included angle of the guide groove of the right circular arc support guide block is fixed, and the external pre-adjustment mechanism is used to adjust and position outside the machine. , lighter support scratches, reduced wear, thereby reducing the number of adjustments, and the use of external pre-adjustment can improve the grinding accuracy and greatly improve the grinding efficiency.

The present invention is for solving the deficiencies of the above-mentioned technical problems, and the technical scheme adopted is:

An external pre-adjustment circular arc centerless support device for a bearing grinder, including a base, an L-shaped plate fixed on the base and an external pre-adjustment mechanism. The external pre-adjustment mechanism passes through the positioning nails on the L-shaped plate Position and fix on the L-shaped plate, the external pre-adjustment mechanism includes a support base plate, a left arc support and a right arc support, and a left arc support guide block and a right arc support are fixedly installed on the support base plate The guide block, the left arc support guide block and the right arc support guide block are provided with guide grooves along the radial direction of the bearing to be processed, and the left arc support and the right arc support are slidably arranged on the left arc support The guide block and the right arc support are in the guide groove of the guide block to adapt to the processed parts of different diameters and adjust the eccentricity, and are fixed by fasteners to limit the free sliding of the left arc support and the right arc support in the guide groove.

There are three positioning nails, two of which are installed on one end of the L-shaped plate connected to the base, and the other is installed on the other end of the L-shaped plate.

The contact surfaces between the left arc support and the right arc support and the workpiece to be processed are arc surfaces.

The guide grooves of the left arc support guide block and the right arc support guide block form an included angle of 0-90°.

The beneficial effects of the present invention are: the present invention fixes the included angle of the guide grooves of the left arc support guide block and the right arc support guide block, and at the same time adopts an external pre-adjustment mechanism to adjust and position outside the machine, with high positioning accuracy. Due to the change of the previous design method in which the support can be rotated, the rigidity of the support is increased, the scratches of the support are lighter, the wear is reduced, and the number of adjustments is reduced, and the external pre-adjustment is used to improve the grinding accuracy. Greatly improved the grinding efficiency.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Icon marks: 1. Left circular arc support; 2. Right circular arc support; 3. Support bottom plate; 4. L-shaped plate; 5. Base. the

Detailed ways

As shown in the figure, the specific implementation method is as follows:

An external pre-setting arc centerless support device for a bearing grinder, including a base 5, an L-shaped plate 4 fixed on the base 5 and an external pre-setting mechanism, the external pre-setting mechanism passes through the L-shaped plate 4 The positioning nails on the top are positioned and fixedly installed on the L-shaped plate 4. The external pre-adjustment mechanism includes a support base plate 3, a left arc support 1 and a right arc support 2, and a left circle is fixedly installed on the support base plate 3. The arc support guide block and the right arc support guide block, the left arc support guide block and the right arc support guide block are provided with guide grooves along the radial direction of the bearing to be processed, the left arc support 1 and the right arc support guide block The arc support 2 is respectively slidably set in the guide grooves of the left arc support guide block and the right arc support guide block to adapt to processing parts with different diameters and adjust the eccentricity, and is fixed by fasteners to limit the left arc support 1 And the right arc bearing 2 slides freely in the guide groove.

There are three positioning nails, two of which are installed on the end where the L-shaped plate 4 is connected to the base 5 , and the other is installed on the other end of the L-shaped plate 4 .

The contact surfaces between the left arc support 1 and the right arc support 2 and the workpiece to be processed are arc surfaces.

The guide grooves of the left arc support guide block and the right arc support guide block form an included angle of 0-90°.

The lower arc support 2 and the left arc support 1 are fixed in the guide groove of the corresponding guide block on the support base plate 3 with screws, and the angle between the lower arc support 2 and the left arc support 1 is adjusted according to the requirements of the grinding parts Fixed, that is, the support angle is fixed and cannot be adjusted to obtain higher support rigidity and support accuracy. The lower circular arc support 2 and the left circular arc support 1 can move up and down along the radial direction of the workpiece in the guide groove of the support base plate 3, so as to adapt to the needs of workpiece size change and adjustment eccentricity. The lower arc support 2, the left arc support 1 and the support base plate 3 are composed of components. On the special grinding table outside the machine, the required eccentricity is called out in advance, and then the lower arc support The 3 components of the bottom plate are positioned and fixed on the positioning nails on the L plate as a whole, and can be used without adjustment on the machine. At the same time, the supporting surfaces of the lower support and the left support are all arc surfaces, which are in precise surface contact with the outer surface of the workpiece to achieve high-precision, high-reliability, and high-efficiency positioning.

The technical solutions and implementation methods listed in the present invention are not limiting, and solutions that are equivalent to or have the same effect as the technical solutions and implementation methods listed in the present invention are within the protection scope of the present invention.

Claims (4)

1. A centerless support device for external preset circular arc of a bearing grinder, including a base (5), characterized in that it is also provided with an L-shaped plate (4) fixed on the base (5) and an external preset mechanism, The external pre-adjustment mechanism is positioned and fixed on the L-shaped plate (4) through the positioning nails on the L-shaped plate (4). The external pre-adjustment mechanism includes a support base plate (3), a left arc Support (1) and right arc support (2), the left arc support guide block and the right arc support guide block are fixedly installed on the support base plate (3), and the left arc support guide block and the right arc support The guide blocks are provided with guide grooves along the radial direction of the bearing to be processed, and the left arc support (1) and the right arc support (2) are slidably set on the guide blocks of the left arc support guide block and the right arc support guide block. In the groove, to adapt to the processing parts of different diameters and adjust the eccentricity, and fixed by fasteners to limit the free sliding of the left arc support (1) and the right arc support (2) in the guide groove. 2. A bearing grinding machine external preset arc centerless support device according to claim 1, characterized in that: there are three positioning nails, two of which are installed on the L-shaped plate (4) and the base ( 5) On one end of the connection, the other is installed on the other end of the L-shaped plate (4). 3. A bearing grinding machine external preset arc centerless support device according to claim 1, characterized in that: the left arc support (1) and the right arc support (2) are in contact with the workpiece to be processed The surface is an arc surface. 4. A bearing grinding machine external preset arc centerless support device according to claim 1, characterized in that: the guide grooves of the left arc support guide block and the right arc support guide block are 0-90 ° Angle.