JPH09206863A - Device for manufacturing transmission gear equipped with external gear line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable manufacture of a teeth line corresponding to actual requirement by conically shaping the engaging face of a forming roller towards a work, meshing the forming roller with a jig, and thereby simply synchronizing the rotary part of a work holding tool with that of the forming roller. SOLUTION: Forming rollers 6, 7 are arranged on the outer circumference of a jig 4, with a teeth line 17, 19 provided on the outer circumferential surface. These rollers 6, 7 are designed to rotate together with the jig 4 when it is rotated. The rollers 6, 7 are also arranged freely rotatably around the Y-axis line on a holder 9, 10. The holder 9, 10 is supported vertically movably in the direction of the arrow F2 . In this case, the teeth line of the forming rollers 6, 7 are not disengaged with that of the jig 4; therefore, the forming rollers are rotatably driven regardless of the vertical movement of the holders 9, 10. The engaged face of the forming rollers 6, 7 is conically shaped towards the work 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for manufacturing a transmission part having an external tooth row, which is deformed by feeding and deforming at least one forming roller. A storage tool that holds a workpiece loaded by the rotary drive, and a forming roller that is rotatably supported by a holder and rotatable about an axis oriented parallel to the axis of the storage tool. Provided, the forming roller being of a type which is movable during the rotational movement so as to be fed to the workpiece in the direction of the Y-axis.

[0002]

A device of this type is known from DE-A-4205711. This known device consists mainly of two axes which are driven synchronously. In this case, one shaft holds the storage spindle for the work and the jig,
The other shaft holds the forming roller. The synchronization of these two axes is done by a chain drive. As a result, only one drive motor can be used. The forming of the work by the forming roller fed toward the work requires a large force. In this case, the forming roller moves in the plane of the circular blank on which the dentition is to be formed. This known mechanical structure is very laborious.

German Patent Application Publication No. 4106
From 966, an apparatus for producing toothed belt pulleys is known. The known device works with at least two identical profiled rollers, both the receiving tool and the profiled roller being provided with separate drives which are driven for synchronous rotation. Since this known device requires a computer as a synchronizing device, the construction of this device is not only very costly, it is also very prone to failure in terms of synchronization between different rotationally driven devices. .

[0004]

SUMMARY OF THE INVENTION The object of the present invention is therefore to provide a device which makes it possible to produce a dentition according to actual requirements and which is simple in construction.

[0005]

In order to solve this problem, in the structure of the present invention, the jig for fixing the position of the work to the storage tool has a tooth row, and the engaging surface of the forming roller is the work. It is formed in a conical shape toward the end so that the forming roller meshes with the jig.

[0006]

With the device according to the invention, two rotary parts, namely the rotary part of the tool with the workpiece to be formed,
Synchronization of the rotating parts of the forming roller or rollers is simple.

Advantageously, three forming rollers are used,
This gives good force distribution. Further advantageously, the drive of the device is carried out via the receiving tool. That is, the spindle of the storage tool is driven. The jig is also rotated by the pressing of the accommodation tool performed via the work. On the outer surface of this jig, a tooth row for engaging the tooth row of the forming roller is provided. The dentition of the forming roller has two problems in this device. That is, the teeth of the forming roller mesh on the one hand with the teeth of the jig for driving the forming roller and, on the other hand, form the edge of the workpiece when these teeth are in contact with the workpiece. .

The device according to the invention starts with the use of a simple circular blank, but also from the use of workpieces with pre-curved edges, thick edges. You may leave.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In the drawing, a spindle 1 is shown which rotates about the X axis. The spindle 1 holds a storage tool 2, and the storage tool 2 has a smooth outer surface and holds a work 3. This workpiece 3 may be formed as a circular blank 12, a pre-curved circular blank 14 and a circular blank 15 with thick edges, as shown in FIG.

A jig 4 is located above the storage tool 2. This jig 4 is arranged on a spindle 5 and is thereby made movable up and down as indicated by arrow F ₁ . The jig 4 presses the work 3 firmly onto the storage tool 2, so that when the storage tool 2 is driven, the jig 4 is rotated together.

A tooth row 17 is provided on the outer surface of the jig 4.

The forming rollers 6, 7 and 8 are arranged on the outer periphery of the jig 4 and have a tooth row 18 on the outer surface thereof. In this case, these forming rollers 6, 7 and 8 are adapted to rotate together with the jig 4 when the jig 4 rotates. These forming rollers 6, 7, 8 are the holding bodies 9, 1
It is arranged at 0 and 11 so as to be freely rotatable around the Y axis. These holders 9, 10 and 11 are supported so as to be able to move up and down in the direction of arrow F ₂ shown in FIG. In this case, the tooth rows of the shaping rollers 6, 7, 8 and the tooth rows of the jig 4 are not disengaged, and the shaping rollers 6, 7, 11 are not affected by the lifting movement of the holding bodies 9, 10, 11. , 8 are driven to rotate. The engagement surfaces of the forming rollers 6, 7 and 8 are formed in a conical shape toward the work 3.

In the diagram shown in FIG. 1, the work 3 is shown as if the tooth row 19 to be formed on the work 3 is already provided. This tooth row 19 is obtained as follows. That is, the jig 4, the housing tool 2, and the forming roller 6,
During the rotational movement of 7,8, these forming rollers 6,7,8
Is moved downwards, whereby the forming rollers 6, 7,
8 forcibly forms the dentition in the edge region of the workpiece 3 which projects beyond the receiving tool.

In order to take out the completed work 3, the jig 4 is lifted and the work 3 is removed.

[0016] Advantageously, after the external toothing 19 of the workpiece 3 has been formed, the forming rollers 6, 7, 8 do not move upward again inside the manufactured toothing. Based on this, the holding bodies 9, 10, 11 are also movable in the direction of the arrow F _{3 in} the radial direction with respect to the work 3, so that after forming the external tooth row 19, the forming rollers 6, 7 are formed. , 8 can be moved slightly outward. In this case, the tooth rows of the forming rollers 6, 7, 8 are still engaged with the tooth rows of the jig 4,
A slight gap is created between the outer tooth row of the work 3 and the forming rollers 6, 7 and 8 to allow easy lifting up and removal of the forming rollers 6, 7 and 8. Become.

As described above, while the accommodation tool 2 is driven, the jig 4 may be driven instead of the accommodation tool 2.

[Brief description of drawings]

1 shows a device according to the invention as seen along the line AB in FIG.

FIG. 2 is a plan view of the device according to the invention.

FIG. 3 is a diagram showing various different shapes of a work to be deformed.

[Explanation of symbols]

1 spindle, 2 storage tools, 3 workpieces, 4
Jig, 5 spindle, 6,7,8 forming roller, 9,10,11 holder, 12,14,15
Round blank, 17, 18, 19 teeth

Claims (2)

[Claims] 1. An apparatus for producing a transmission part having an external tooth row, wherein a deformed shape is formed by deforming after feeding at least one forming roller, which comprises a workpiece loaded by a jig. A holding tool which is held and rotationally driven, and a molding which is rotatably supported by a holding body and is rotationally drivable about an axis (Y) oriented parallel to the axis (X) of the receiving tool (2). A jig for fixing the work (3) to the storage tool (2) in the form of a roller, the forming roller being movable so as to be fed to the work in the direction of the Y axis during rotational movement. (4) has a tooth row (17), and the engaging surface of the forming roller (6, 7, 8) is formed in a conical shape toward the work, and the forming roller (6, 7) , 8) mesh with the jig (4) To an apparatus for producing the transmission part with an external toothing. 2. Device according to claim 1, wherein three forming rollers (6, 7, 8) are provided.