JPH071226Y2 - Gear type deburring tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a gear-type deburring tool for removing burrs that occur after finishing of gears and dents that occur during transportation.

(Prior Art) In gear cutting or shaving of gears, splines, etc., burrs may occur on the ridge lines of the tooth portion of the workpiece after processing, or they may come into contact with each other during transport and cause damage. . After heat treatment, a treatment such as sand plast is applied to remove them, but they cannot be completely removed.
Further, if a gear with burrs or scratches is used, smooth rotation of the gear is hindered and proper fitting is hindered in the spline. In order to mechanically solve such a problem, as disclosed in Japanese Utility Model Laid-Open No. 61-201732, a pair of side edge portions and a root edge portion of a tool tooth surface are left to leave a tooth tip from a tooth root edge. A deburring tool having reliefs provided along the tooth surface is used.

(Problems to be solved by the invention) Since such a tool meshes a gear to be processed with a deburring tool and rotates at high speed, an oil pool is formed between the tooth flank of the gear to be machined and the tooth flank of the tool to allow cutting with grinding powder mixed. Oil is hard to drain. Therefore, the cutting oil to be discharged enters the contact surface on the contrary, and the polishing powder mixed with the oil damages the tooth surface of the workpiece and causes the clogging of the abrasive grain surface. Also, in order to process the above relief on the tooth flank of the tool, it must be formed on both left and right sides of each tooth, and a special machine must be used for this machining work, which is troublesome and man-hour Costly and costly.

(Means for Solving the Problem) In order to solve such a problem, in the present invention, each tooth of the gear-shaped tool tempered to HRC35 to 65 has a recessed portion which is formed in a circumferential direction from the tip to the root. The present invention relates to a gear type deburring tool in which hard abrasive grains are attached to at least one side of each tooth surface, and discharges cutting oil mixed with grinding powder well.

(Operation) When the deburring tool and the work piece are meshed and either one is rotated, the tool body is tempered to HRC35-65 and has hardness and toughness at a speed. Without being buried in the main body or peeling off, the teeth are slipped due to the meshing with the work piece,
Be sure to grind the tooth surface of the work piece to remove burrs and nicks.

Further, the grinding oil is completely discharged together with the grinding powder from the through recess at the center of the tooth of the tool.

(Example) Next, the Example of this invention is described about drawing. The deburring tool according to the present invention has a gear shape and is tempered to HRC35-65. FIG. 1 is an enlarged view of one of the teeth (5) formed on the outer circumference of the main body of the tool.
Each tooth (5) is provided with a U-shaped through recess (4) in the circumferential direction from the tooth tip (13) toward the tooth bottom (16), and each tooth surface (14) has a pair of side edge portions. That is, the left side edge portion (1), the right side edge portion (2) and the tooth bottom edge portion (3) are formed. Hard abrasive grains such as diamond or CBN are attached to the tooth surface by electrodeposition.

Further, as shown in FIG. 2, the through recess (4) has a substantially U-shape intersecting with a curved line instead of the U-shape, so that stress concentration at the time of cutting to the corner portion can be avoided.

The hard abrasive grains may be applied to both surfaces of one surface (14), or may be applied to one surface if necessary.

Now, as shown in FIG. 3, the deburring tool (5) and the workpiece (6) are engaged with each other without backlash, and the arrow (A) is shown.
When the rotation is applied in the direction of, the slip effectively acts in the direction of arrow (7) on the tip side of the tooth height direction and in the direction of arrow (9) on the tooth bottom side. There is a place where the slip is near zero in the vicinity of the pitch circle (8), but even in that case, the tooth surface (14) of the deburring tool (5) presses the tooth surface (15a) of the workpiece, and the pressing pressure and hard Deburring can be performed by the action of the abrasive grains.

Thus, the left ridgeline (1
1), burrs and scratches along the right ridgeline (12) and the tip ridgeline (10) are completely removed. To deburr the other tooth surface (15b) of the workpiece (6), deburr the arrow (A) in FIG.
If it is rotated in the opposite direction, the undepicted teeth of the deburring tool meshing with the teeth of the workpiece perform deburring by the action of pressing pressure and hard abrasive grains.

Furthermore, in the case where hard abrasive grains are adhered only to the tooth surface on one side of the deburring tool, after the deburring processing on one side is finished, the workpiece is turned upside down and the deburring tool is re-engaged and rotated, As a result, the processed product is free from burrs and dents on both tooth surfaces.

(Effect) As described above, according to the present invention, a through recess is provided in the circumferential direction from the tooth tip of the tool toward the tooth bottom to form a pair of side edge portions and tooth root edge portions on the tooth surface, and at the same time, on the tooth surface. Since hard abrasive grains are attached, burrs and dents along the ridge line of the work piece can be removed very easily by simply engaging the work piece with the deburring tool and rotating it, and the cutting oil enters the meshing section. , The discharge was done smoothly and there was no scratch on the tooth surface of the work piece due to the grinding powder. Furthermore, since the through recess at the center of the tooth portion of the deburring tool can be machined with a general lathe etc., the number of machining man-hours is greatly reduced, and the cost of the deburring tool is reduced.

Moreover, since the tool body is tempered to HRC35-65, hard abrasive grains will not be embedded in the tool body or peeled off during processing, so deburring can be performed reliably and without any hindrance. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an embodiment of the present invention, FIG. 2 is a perspective view of an essential part of another embodiment, and FIG. 3 is a meshing state of a deburring tool and a workpiece according to the present invention. A schematic view and FIG. 4 are partial perspective views of a tooth portion of a workpiece. 1 ... left edge, 2 ... right edge, 3 ... root edge, 4
…… Through recess, 5 …… Tooth, 13 …… Tooth tip, 14 …… Tooth surface, 16
…… The bottom of the tooth.

Claims (3)

[Scope of utility model registration request] 1. A tooth-shaped tool main body tempered to HRC35 to 65 is provided with a recessed portion in the circumferential direction from the tip of the tooth toward the root of the tooth, and a pair of side edge portions and a root edge are provided on the tooth surface. A gear type deburring tool in which a hard abrasive grain is adhered to at least one side of each tooth surface while forming a portion. 2. The gear type deburring tool according to claim 1, wherein the through recess is substantially U-shaped. 3. The gear type deburring tool according to claim 1, wherein a side edge portion and a tooth bottom edge portion of the through recess intersect with each other in a curved line.