CN100500373C - A grinding method of camshaft - Google Patents

Abstract

The invention relates to a method for abrading cam axle, wherein the invention is characterized in that: mounting one annular steel band on one active wheel and one tension wheel, to tension the annular steel band; the steel band has one outer surface adhered with abrasive sands, while its length is longer than annular steel band; one end of sand band is contacted to the steel band, while another end is tensioned by another tension wheel; the work-piece cam axle is contacted at one side of steel band, and another side has one support wheel supports the annular steel band and annular sand band, therefore, the annular sand band will not deform in abrasion; the central line of cam axle is parallel with the central axles of active wheel and tension wheel; the rotation angle of cam axle and its distance between its center position and abrasive plane can be controlled to meet the angle-strike curvature. The invention has simple operation and high accuracy.

Description

A grinding method of camshaft

technical field

The invention belongs to the category of mechanical manufacturing, in particular to a grinding method of a camshaft.

Background technique

The existing cam processing generally uses grinding wheels for grinding. During grinding, the rotation center line of the grinding wheel is parallel to the rotation center line of the cam, and the cam contour line is processed by adjusting the distance between the two. Due to the continuous wear of the grinding wheel, the diameter of the grinding wheel Changes are produced, and the cam profiles generated by the same two centerline variation rules for different grinding wheel diameters are different. In actual processing, due to the change of the cam profile, the high-precision cam can only be processed by an expensive CNC cam grinder, and the high-precision cam must be corrected in time to produce a high-precision cam, which is not economical and practical.

Contents of the invention

The purpose of the present invention is to provide a simple, convenient, ideal effect and high precision camshaft grinding method using abrasive belt processing to address the deficiencies of the prior art.

Technical scheme of the present invention is as follows:

A camshaft grinding method, characterized in that: a ring-shaped steel belt is installed on a driving wheel and a tensioner wheel, so that the ring-shaped steel belt is tensioned, and there is a ring-shaped belt with grinding grains attached to the outer surface of the ring-shaped steel belt. The abrasive belt is longer than the endless steel belt. One end of the endless abrasive belt is close to the endless steel belt, and the other end is tensioned by another tensioner wheel. The workpiece camshaft is close to one side of the endless steel belt. , there is a supporting wheel at the corresponding position on the other side to withstand the annular steel belt and the annular abrasive belt, so that the annular abrasive belt will not be deformed when subjected to grinding force, and the centerline of the camshaft and the central axis of the driving wheel and the tensioning wheel Parallel, the camshaft profile can be ground by controlling the rotation angle of the camshaft and the distance between its center position and the grinding plane of the abrasive belt to conform to the angle-lift curve of the cam.

When the driving wheel of the present invention rotates, it drives the annular steel belt to move, and under the action of the tension wheel, there is enough friction between the annular steel belt and the driving wheel to make the driving wheel drive the annular steel belt to move, and the gap between the annular abrasive belt and the annular steel belt There is also enough friction to make the steel belt drive the abrasive belt to move, and the sand grains on the outer surface of the moving abrasive belt are used to grind the outer surface of the camshaft. At the same time, due to the support of the support wheel, the annular abrasive belt does not deform when grinding, and the camshaft is controlled. The rotation angle and the distance between the center position and the grinding plane of the abrasive belt conform to the angle-lift curve of the camshaft to grind the cam profile. The invention is simple and convenient, easy to operate and high in processing precision.

Description of drawings

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

Detailed ways

As shown in Figure 1, a grinding method of a camshaft is characterized in that: an endless steel belt 1 is installed on a driving wheel 2 and the first tensioner 3, so that the endless steel belt 1 is tensioned, There is an annular abrasive belt 4 with abrasive grains attached to the outer surface of the steel belt 1, the length of which is greater than that of the annular steel belt 1. One end of the annular abrasive belt 4 is close to the annular steel belt 1, and the other end is held by the second tensioning wheel 5. 4 tensioning, the workpiece camshaft 6 is close to one side of the annular steel belt 1, and a supporting wheel 7 on the other side supports the annular steel belt 1 and the annular abrasive belt 4, so that the annular abrasive belt 4 is subjected to grinding force The centerline of the camshaft 6 is parallel to the central axis of the driving wheel 2, the first tensioning pulley 3 and the second tensioning pulley 5. By controlling the rotation angle of the camshaft 6 and its center position and the The camshaft profile can be ground by grinding the distance between the grinding planes according to the angle-lift curve of the cam.

The width of the annular abrasive belt 4 of the present invention is greater than the width of the camshaft 6, and the width of the annular steel belt 1 is greater than the width of the annular abrasive belt 4, so as to facilitate the completion of grinding.

Support wheel 7 of the present invention can have a plurality of as required, is as the criterion with being able to withstand endless steel belt 1 and annular abrasive belt 4.

Claims (3)

1. A grinding method for a camshaft, characterized in that: an endless steel belt (1) is mounted on a driving wheel (2) and the first tensioning pulley (3), so that the endless steel belt (1) Tight, there is an annular abrasive belt (4) with an outer surface attached to grinding grit outside the annular steel belt (1), the length is greater than the annular steel belt (1), and one end of the annular abrasive belt (4) is close to the annular steel belt (1), The other end is tensioned by the second tensioning wheel (5), the workpiece camshaft (6) is close to one side of the endless steel belt (1), and there is a supporting wheel (7) on the other side Hold the annular steel belt (1) and the annular abrasive belt (4) so that the annular abrasive belt (4) will not be deformed when subjected to grinding force, and the center line of the camshaft (6) is in contact with the driving wheel (2), the first The central axes of the tensioning wheel (3) and the second tensioning wheel (5) are parallel, by controlling the rotation angle of the camshaft (6) and the distance between its center position and the grinding plane of the abrasive belt (4) to meet the cam The camshaft profile can be ground out of the angle-lift curve. 2. The grinding method of a camshaft according to claim 1, characterized in that: the width of the annular abrasive belt (4) is greater than the width of the camshaft (6), and the width of the annular steel belt (1) is greater than that of the annular abrasive belt. width. 3. The camshaft grinding method according to claim 1 or 2, characterized in that there are multiple support wheels (7) as required.