JPH0749169B2 - How to remove burr on gear tooth surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The disclosed technology belongs to the field of technology for removing burr-like burrs formed by primary molding inside the tooth surface of gears such as gears and pinions.

<Summary of Summary> Accordingly, the present invention is an invention relating to a method for removing a burr that occurs when chamfering is formed by an end mill or the like to impart a speed change or the like of a gear that forms a gear such as a pinion or a gear. Yes, in particular, a worm having a predetermined diamond abrasive grain electrodeposited by nickel plating or the like is obliquely crossed with respect to the burr portion of the tooth surface of the work by a predetermined angle at a position deviated from the axial center of the worm to form a burr portion. The invention relates to a method for continuously removing the burr by rotating the tooth surface of the worm from the inner side to the outer side and from the upper side to the lower side in an engaged state with the tooth surface of the work.

<Prior Art> As is well known, gears such as pinions and gears are widely used in mechanical devices, in particular, mechanical devices having moving parts, and therefore, the gear forming processing equipment and technology are also highly advanced. It has been developed and put into practical use.

And, except for special cases, most gears are subjected to gear cutting and cutting by a forming device such as a hob, and the work of the material gear is primarily formed by cutting such as light shower die or rice howell, and shaving. The finishing process is done with a cutter.

<Problems to be Solved by the Invention> Thus, in the case of a gear of primary molding, chamfering is formed by an end mill or the like in order to impart a speed change or the like. As shown in the figure, a sharp burr 3 is inevitably formed outward at the end of the tooth surface 2 of the work 1. Therefore, naturally, the burr must be removed in the secondary processing. In order to deal with this, in the past, manual work such as filing with a file or creating chamfering with a grindstone was performed.

Therefore, the manual work for removing the burr has a drawback that it is extremely inefficient, and also requires a great deal of skill, and the finishing accuracy is difficult to achieve uniform reproducibility. There is.

Therefore, as a result, there is a demerit that leads to high cost, and there is also a disadvantage that the quality becomes unstable, and there is a problem that a uniform finishing accuracy cannot be obtained without being linked to a mass production system.

<Object of the Invention> An object of the present invention is to solve the problem of removal of burrs generated at the time of forming chamfering on the tooth surface of the gear after primary molding based on the above-mentioned prior art, which requires technical skill. The burr can be removed without fail with uniform finishing accuracy, and the work can be performed continuously to meet the tact of the line, cost can be reduced, the finishing accuracy can be improved, and the reliability of the product can be increased. It is intended to provide an excellent method for removing the burr on the tooth flank of the gear, which is advantageous in the field of molding technology application in the machine manufacturing industry.

<Means and Actions for Solving the Problem> In order to solve the above-mentioned problems, a gear material such as a pinion or a gear according to a predetermined cutting process is used to solve the above-mentioned problems. The tooth surface of the worm formed by electrodeposition of abrasive grains such as diamond is meshed with the tooth surface of the workpiece at a predetermined angle in an oblique posture with respect to the workpiece after the forming processing of The work is rotated, and the lead of the worm causes a sliding action between the tooth surface of the work and the tooth surface of the work,
A portion of the worm that is off the axis is engaged with a burr portion formed when chamfering the tooth surface of the work to move the burr from the inner side to the outer side, from the front side of the tooth surface to the base side of the tooth surface. The worm is rotated by a predetermined amount to remove the worm, or the worm is rotated in the reverse direction so that the burr at the tooth flank end of the workpiece can be removed continuously with the same accuracy. Is.

<Embodiment> Next, one embodiment of the present invention will be described below with reference to FIGS. It should be noted that parts that are the same as those in FIG. 4 will be described using the same symbols.

Reference numeral 1 is a work of a spur gear type gear that is primarily formed by a predetermined cutting process, and a sharp burr 3 is inevitably formed on the tooth surface 2 of the chamfering imparting surface toward the outside like the conventional mode. Has been done.

The holder 4 is clamped so that the burr 3 can be removed.

Reference numeral 5 denotes a burr removing device, the motor 6 with a reduction gear is fixed to a predetermined base (not shown), and the worm 7 is detachably attached to the output shaft thereof.

Further, abrasive grains 8 such as diamond are fixed to the worm 7 by electrodeposition so as to be uniformly dispersed on the surface by nickel plating or the like.

Thus, the worm 7 and the work 1 are arranged such that the tooth surfaces of the worm 7 cross each other so that the tooth surfaces of the worm 7 mesh with each other, and the tooth surface of the worm 7 causes the workpiece 1 to rotate. The worm 7 is provided with a frictional action on the tooth surface.
The workpiece 1 at the portion where the tooth surface of the
The burr 3 is engaged so as to be removed from the inner side to the outer side, from the front side of the tooth surface to the base side of the tooth surface, and is rotated at a predetermined speed.

Then, when the motor 6 with a reducer is rotated a predetermined amount, the worm 7 rotates and the workpiece 1 is meshingly fed and rotated while the burr 3 is moved from the inner side to the outer side at the end of the tooth flank 2 of the tooth flank. The burr 3 is continuously removed by brushing from the part side to the base side of the tooth surface.

Therefore, the removing work is always made uniform, and the finishing accuracy is as designed.

The shape and size of the worm 7 and the oblique angle with respect to the work 1 are predetermined by design depending on the type of the work 1, and the worm 7 is sequentially changed depending on the kind of the work 1 to adjust the oblique angle. To do.

Incidentally, it goes without saying that the embodiment of the present invention is not limited to the above-mentioned embodiment, and for example, the target gear is not only a pinion or a spur gear, but various gears such as a bevel gear or a partial gear can be applied. Aspects can be adopted.

<Effects of the Invention> As described above, according to the present invention, basically, the chamfering of the chamfering of the end of the tooth surface of the primary-formed gear work is formed in the applied portion is different from the chamfering work. It can be done automatically regardless of work, and because it can be performed continuously, the finishing accuracy is sufficient regardless of skill etc., and
It has the excellent effects that it can be made uniform with reliable reproducibility, the reliability of the product is improved, and the product yield is improved.

Since the tooth surface of the worm and the tooth surface of the work of the gear are obliquely cross-sectioned for automatic molding, the line tact is not affected and good mass productivity can be achieved. It

Further, since it leads to continuous mass production, it has an effect of reducing the cost of the product.

Thus, since the rotation direction of the worm with respect to the work can be engaged with the tooth surface in a constant direction, the meshing of the worm is shifted by the wear of the tooth surface of the worm, and if the opposite surface is also used, the worm There is also an effect that can be used for a long time.

[Brief description of drawings]

1 to 3 are views for explaining one embodiment of the present invention.
The figure is a schematic plan view of the burr removal, FIG. 2 is a partial sectional view of the work, FIG. 3 is a plan view of the tooth surface, and FIG. 4 is a perspective view of the burr molding state of the tooth surface of the work after the primary molding. . 1 ... Workpiece, 2 ... Tooth surface, 3 ... Burr, 7 ... Worm, 8 ... Abrasive grain

Claims (1)

[Claims] 1. A method for continuously removing burrs in a tooth surface of a work after primary molding of a gear, wherein the teeth of a worm having abrasive grains attached thereto are meshed with the teeth of the work in an oblique manner. The tooth surface of the worm causes rotation of the tooth surface of the worm and the work, and the lead of the worm causes a frictional action between the tooth surface of the work and the burr portion of the tooth surface of the work from the inside to the outside. A method for removing burr on a tooth flank of a gear, characterized in that cleaning is performed from the front side of the tooth surface to the base side of the tooth surface.