JPS59219117A - Device for finishing tooth surface of gear - Google Patents

Abstract

PURPOSE:To allow the primary cutting dimensional accuracy of a gear in the step prior to the finish-machining step to be rough and as well to enhance the finished accuracy of the gear, by enabling the contact ratio to be nearly equal to 2. CONSTITUTION:A device for finishing the tooth surface of a gear 1 comprises a gear supporting means 2 for rotatably supporting the gear 1, a rack 4, and a drive device for rectilinearly moving the gear 1 carried by the means 2 and the rack 4 meshed with the gear 1, and therefore, the contact ratio therebetween can be made nearly equal to 2. Therefore, the primary cutting dimensions of the gear in the step prior to the finish-machining may be rough in comparison with a gear rolling. The horizontal movement of the gear 1 and the rack 4 which are meshed each other, may be made in such that the gear 1 is moved to mesh with the rack 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gear tooth surface finishing device using a rack.

Conventionally, as shown in FIG. 1, there is a so-called gear rolling method in which a gear 103 is sandwiched between a pair of shaping gear cutters or tooth width rolling tools 101 and 102, and one or both of the gear cutters or gear rolling tools are rotated. Then, the gear's m-face finish is added to 4rh. However, this method has the following drawbacks.

A) G)'Cutter or Heishin-shaped rolling, the meshing ratio between 1μ and Yamanaka cannot be obtained high, and the addition of the tooth surface nA:S becomes uneven, and the more pressure points are added (,1,lt Since the south face of the gear is uneven, only one round of machining is possible to remove minute irregularities on the tooth surface.For this reason, relatively high precision is required for the A3 gear bottom cut\1 method on one culm before finishing.

Mouth) To achieve a good tooth surface finish for smallpox (J tooth shape correction (i)
A Furukawa Gino's cutter or a gear shape rolling tool is required.

C) Gear cutter or tooth 1p type rolling: It is difficult to achieve high accuracy in tooth surface finishing because it is difficult to achieve a high meshing rate with the single shell.

The purpose of the present invention is to achieve a meshing ratio close to 2. (a) The lower cutting dimension viscosity of the gear in the pre-processing process of raising the gear can be made rougher than in the 1-ring method, and the tooth profile is close to the standard (
・It is possible to finish the tooth profile (1, i-
The teeth of the monkey wheel that will definitely improve your il'i'i degree! m f
l,'-1keg iiJ (1) II donor nial.

The gear tooth surface finishing device of the present invention includes a support means for rotatably supporting the gear to be finished, and a rack cutter or rack type that can perform tooth surface finishing processing (j) with a rack cutter or a rack type that has a tooth profile corresponding to the gear module. It is composed of a rolling tool (hereinafter referred to as a rack) and a drive mechanism that engages with the rack mounted on the support means and reciprocates linearly.

Next, the present invention will be explained based on the embodiment shown in FIGS. 2 and 3.

1 is the center of the south, 2 is a gear support + S two-stage that supports the gear rotatably, 3 is a base that moves up and down and horizontally by hydraulic pressure, and 4 is fastened to the base. It is a rack that has been installed.

This gear tooth surface leveling device 6 takes the gear 1 onto the support means 2, and lifts the base 3 to the level where the rack 4 meshes with the gear 1. ! At the same time, while pressing the rack 4tc with a predetermined spring load on the center plate 1, the base 3 is moved back in the horizontal direction to finish the tooth surface of the U gear 1. d3, move the L4 rack 4 in this example.
! Gear 1 engages with rack 4, and it moves! (Of course there are good things.

In the present invention, by arranging two or more racks 4 in parallel on the beam platform 3, it is possible to easily trim two or more of the central tooth surfaces 11 at the same time; 1. By arranging two or more gear supporting means of the IJ device in series (carrying out two or more gears at the same time), work efficiency can be further improved.

As described below, the device rC for raising the upper surface of the tooth II of the present invention includes means for rotatably supporting the gear, a rack, a tooth mounted on the supporting means, and the chic. It consists of a drive mechanism that moves linearly and reciprocates with the interlocking V, and @ content ratio is 2.
The bottom cut dimension v1 of the gear placed on the culm is rougher than the ring, and the finishing accuracy of the tooth profile is reliably improved. Mark I
Finishing with a tooth profile close to lj is iiJ performance.

[Brief explanation of the drawing]

Figure 1 & 31 Front view of conventional gear tooth surface stub device,
Fig. 2 is a front view of the gear tooth surface finishing device of the present invention;
The figure is a side view of the gear tooth surface finishing device of the present invention. In the figure 1...Gear 2...Tooth i11 support means 3.
... Rack 4 ... Reciprocating drive machine I'I'g 9

Claims (1)

[Claims] 1) supporting means for rotatably supporting the double tooth width to be processed;
A rack having a tooth profile corresponding to the module of the gear that performs the tooth surface A]]-Gearing, and the supporting means 8'! 11 double movement DL in a straight line by meshing with the rack that was installed in the mountain! Gear tooth surface finishing device 6 consisting of a drive mechanism etc.
．． .