JPS5976756A - Working device of generating gear for internal peripheral surface of work with oblong sectional configuration - Google Patents

Abstract

PURPOSE:To generate the gear in the internal peripheral surface of the work with oblong section with a high accuracy by a method wherein the work is moved along the oblong trace by utilizing the planetary rotating motion of planetary gears while a tool having an axial line parallel to the axial lines of the planetary gears is rotated. CONSTITUTION:When a spindle 8 and a driving gear 17 are rotated, the planetary gears 27 is revolved through a rotation regulating gear 21 and a crank shaft 20 while the planetary gear 27' is revolved through the rotation regulating gear 21, a free rotation gear 15, the rotation regulating gear 21' and the crank shaft 20' respectively. According to these motions, each pins 35, 35' on respective planetary gears 27, 27' describe the trace 35a of the long-circle, therefore, a slide-contact base plate 33 and the work W, fixed to the base plate 33, are moved along the oblong trace without accompanying rotations. The internal surface 39 of the work W is created into the oblong sectional configuration by the rotation of a cutter edge 9 on the spindle 8.

Description

Detailed Description of the Invention The present invention utilizes the planetary rotational motion of the planetary gear to cause the workpiece to perform an elliptical motion, that is, an elliptical motion while maintaining a constant directionality. The present invention relates to an apparatus for generating an inner circumferential surface of a workpiece having an oval cross-sectional shape, which generates a cylindrical inner circumferential surface having an oval cross-sectional shape.

Conventionally, it has not been easy to process the inner circumferential surface of a workpiece with high accuracy so that it has an oval cross-sectional shape. It has been desired to develop an apparatus for generating the inner circumferential surface of a workpiece having an oval cross-sectional shape that is simple in construction and inexpensive.

Therefore, the main object of the present invention is to obtain a generating processing device for the inner circumferential surface of a workpiece having an oval cross-sectional shape, which has high processing accuracy, is simple in construction, and can be provided at low cost. be.

Embodiments of the present invention will be described below with reference to the drawings.

First, in FIG. 1, a spindle through hole 2 and a pair of crankshaft support holes 3 and 4 are formed in a surface plate 1 in a direction perpendicular to the working surface of the surface plate 10. Inside the spindle through hole 2, the spindle case 5 is connected to the surface plate 1.
It is supported by a support device (not shown) so that it can reciprocate in a direction perpendicular to the working surface. Inside this spindle case 5, a spindle 8 is rotatably supported via a pair of bearings 6.7 about an axis perpendicular to a working surface rC of constant m1.

A tool insertion hole is formed on the tip side of the spindle 8, and the root portion 11 of the cutter tool 1/), which has a full cutter blade 9 on its outer periphery, is inserted into the tool insertion hole and the set screw is inserted. It is fixed in place. This cutter tool 10 is replaceable, and tools for grinding, polishing, honing, etc. can be selectively employed and installed as required.

On the outer peripheral surface of the gear shaft support 12 of the spindle 8 between the pair of bearings 6 and 7, teeth 16 having a sufficient width in the axial direction are provided via the pair of bearings 13 and 14. A rotating gear 15 is pivotally supported. The spindle 8 and the free rotation gear 15 can reciprocate in the axial direction together with the spindle case 5, and the spindle 8 is driven by a rotation drive device (not shown) connected to the base end side of the spindle 8. Spindle case 5
and is configured to be driven and rotated around the axis of the spindle 8 relative to the free rotation gear 15.

A crankshaft 20 is inserted into each crankshaft support hole 3, 4 via a pair of bearings 18, 19 and 18', 19', respectively.
, 20' are pivotally supported, and each of these crankshafts 20.
Spline 22 formed on the outer peripheral surface of the proximal end of 20'
．． Rotation adjustment gears 21 and 21' as timing gears spline-coupled to 22' are in mesh with the free rotation gear 15, and one of the rotation adjustment gears 21
-: Also meshes with a drive gear 17 that is driven and rotated by a drive device (not shown). Each rotation adjustment gear 21° 21' has the same number of teeth. therefore,
While the rotation adjustment gear 21 is driven and rotated by the drive gear 17 and rotates once, the other rotation adjustment gear 21' also rotates exactly as the rotation adjustment gear 21 in synchronization with the rotation of the rotation adjustment gear 21.
rotate once in the same direction.

Each crankshaft support hole 3 is provided on the work surface side of the surface plate 1.
, 4 are formed concentrically with concave portions 23, 23',
In each of these concave portions 23, 23', a crank arm 24 formed at the tip of each crankshaft 20, 20'
, 24' have gear support shafts 25 and 25, respectively.
A planetary gear 27, 27' that meshes with an internal gear 26 formed along a plane parallel to the working surface of the surface plate 1 is pivotally supported on the side circumferential surface of each concave portion 23, 23'. There is.

The number of teeth of each internal gear 26.26' is equal to each other, and the number of teeth of each planetary gear 27.27' is equal to each other.
Moreover, each planetary gear 27, 27' meshes with a corresponding internal gear 26, 26' so as to revolve in the same phase around the corresponding crankshaft 20, 20'. Each of the planetary gears 27 and 27' has the same structure, and as shown in FIG. A plurality of pin insertion holes 29.30, 31.32 and 2g, 30', 31 with different distances from the center, for example, 4 pin insertion holes.
'.

It has 32'.

mutually corresponding pin insertion holes of each planetary gear 27, 27';
For example, one end of the pin 35.35' inserted into the pin insertion hole 34.34' of the adjacent board 33 is inserted into the pin insertion hole 29.29' so that the fluid can freely flow on the working surface of the surface plate 1. side is inserted. The creeping substrate 33 has an opening 36 for preventing interference with the spindle 8 during synovial fluid movement on the working surface of the surface plate 1, and has an opening 36 for preventing interference with the spindle 8, and allows each planetary gear 27, 27' to be connected by each pin 35, 35'. As a result of being pivotally supported by each planetary gear, it moves synovially on the work surface of the surface plate 1 while maintaining a constant directionality without rotation and wobbling.

A workpiece W having a workpiece surface 39 on the inner periphery is fixed on the synovial fluid substrate 33 with a fixing bolt 37 and a position setting pin 38.
The planetary gear 27 driven by 0 is connected to the other crankshaft 2
When the pin 35 is closest to the other crankshaft 20', the pin 35 is also closest to the other crankshaft 20'. A planetary gear 2 in which the axes of the planetary gear 27 and the pin 35 are aligned on the same plane and are simultaneously driven by the crankshaft 20'.
7' and pin 35' are adjusted to be the most distant from the other crankshaft 20, and the axes of crankshaft 20', planetary gear 27', and pin 35' are aligned on the same plane.

Since the illustrated embodiment is configured as described above,
When the spindle 8 is rotated and the drive gear 17 is rotated, the planetary gear 27 is rotated through the rotation adjustment gear 21 and the crankshaft 20, and the planet gear 27' is connected to the rotation adjustment gear 21. The free rotation gear 151 is rotationally driven via the rotation adjustment gear 21' and the crankshaft 20'. At this time, as shown in FIG. but,
As the gear support shaft 25 revolves around the axis O of the crankshaft 20 along the locus circle 25a of the axis, the axis of the pin 35 is drawn in an elliptical locus 35a' (ir. Geometry As is clear from the above, the radius of the long axis of the elliptical locus 35a is
When the diameter of the pitch circle 27a of the planetary gear 27 passing through the axis of the pin 35 is divided into 92 by the axis of the pin 35, the length of the longer line segment is equal to t, and the radius of the short axis is equal to The diameter of the pitch circle 27a of the planetary gear 27 passing through the axis of pin 3
It is equal to the length m of the shorter line segment when divided into 92 parts by the axis of 5.

Since the planetary gear 27' also rotates while maintaining the same phase as the planetary gear 27, the pin 35' is arranged so that its axial center draws an elliptical locus congruent with the elliptical locus 35a of the axis of the pin 35. , move while maintaining the same phase as the pin 35. Therefore, the synovial fluid substrate 33 and the workpiece W fixed to the synovial fluid substrate 33 move along an elliptical trajectory congruent with the elliptical trajectory 35a while maintaining a constant directionality without rotational movement. exercise. This means that, as shown in FIG. 4, the axis of the spindle 8 is a normal elliptical locus 8a along the processing surface 39 of the workpiece, which is relatively congruent with the elliptical locus 35α.
This corresponds to drawing .

As a result, on the workpiece surface 39, where r is the distance from the axis of the spindle 8 to the cutting edge of the cutter blade 9, the outer envelope of a group of circles with a radius r and centered on the normal elliptical locus 8α. A smooth continuous circumferential surface with an oval cross-sectional shape is created. In this way, by moving the spindle 8 in the axial direction together with the spindle case 5 and the free rotation gear 15, the entire surface 39 of the workpiece W can be processed.

Also, the pin insertion holes 29° and 30° of each planetary gear 27 and 27'.
31, 32 and 29', 30', 31', 3S'
By arbitrarily selecting and inserting the pin 35.35''k, it is possible to obtain elliptical trajectories of the workpiece W having different major and minor axes.

Furthermore, the same control of each planetary gear 27, 27' may be performed by any other arbitrary means other than the one shown in the drawings, such as electrical control.

As described above, according to the present invention, the planetary rotational motion of the planetary gear is used to move the workpiece along an elliptical locus while maintaining a constant directionality, and the gear of the planetary gear A cylindrical inner circumferential surface with an oval cross-sectional shape is created on the inner circumferential side of the workpiece by a tool that is driven and rotated around the circumference of the axis parallel to the axis, allowing for simple machining. The apparatus can generate a cylindrical inner circumferential surface having a smooth continuous oval cross-sectional shape with high processing accuracy.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a generating processing device for the inner circumferential surface of a workpiece having an oval cross-sectional shape based on an embodiment of the present invention;
Fig. 2 is a plan view showing an example of the planetary gear used in the device shown in Fig. 1, and Fig. 3 is the motion trajectory of the planetary gear and the pin inserted into the pin insertion hole of the planetary gear in the device shown in Fig. 1. FIG. 4 is a diagram for explaining the relative movement trajectory of the spindle and cutter blade with respect to the workpiece in the apparatus shown in FIG. 1.2 1...Surface plate 10. ...Cutter tool 26.
26'...Internal gear 27.27'...Planetary gear 33...Synovial fluid substrate 39...Work surface W...Workpiece patent applicant Honda Motor Co., Ltd.

Claims (1)

[Claims] The internal gears (26, 26') are arranged along a plane parallel to the working surface of the surface plate (1), and the internal gears have a number of teeth that is 1/2 of the number of teeth of 26° and 26'. and the internal gear (26, 2
A planetary gear (27,
27') and the planetary gear (27°27') at a position radially apart from the rotation axis of the planetary gear (27°27').
7, 27'), and the planetary gears (27, 2
7') A parallel substrate (33) that moves synovially on the working surface of the surface plate (1) while receiving a driving force and maintaining a constant directionality without rotational movement. Connecting board (33
) The workpiece surface (39) of the workpiece V) fixed to
A cutter tool (10) that is driven and rotated around an axis parallel to the gear axis of the planetary gear (27, 27)
An apparatus for creating an inner circumferential surface of a workpiece having an oval cross-sectional shape, comprising: