JPH03161216A - Hobbing machine for working screw rotor - Google Patents

Abstract

PURPOSE:To accurately operate a hobbing machine for working screw rotor, efficiently, by providing two hobbing heads and two tables on one hobbing machine, so as to perform working on both parts, at the same time. CONSTITUTION:Two hobbing heads 7a, 7b as well as two tables 2a, 2b are provided on one hobbing machine, so as to perform working on both parts, at the same time, and, by receiving the influence of the relative error between the tables 2a, 2b and a column 3, in common, a work 5 of less relative error can be obtained. Two hobbing heads 7a, 7b are installed on one saddle 6, by which the accuracy for the vertical sending of the hobbing heads 7 is received in common, and the work 5 of less relative error can thus be obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is suitable for machining gears that mesh in pairs, particularly rotor machining of screw fluid machines that have long tooth widths and require high-precision machining. Regarding hobbing machines.

[Conventional technology]

Normally, a hobbing machine is equipped with one hob head and one table, and for example, parts such as gears that are used in pairs are processed individually. In the case of the rotor of a screw fluid machine, the male rotor and female rotor are paired, and in order to seal the gas at the meshing part, high precision machining with little mutual error is required, but this machining has also been done individually. It is processed individually. The method of machining screw rotors in pairs is described in Japanese Unexamined Patent Publication No. 47
- Co-printing processing as described in No. 36091 has also been proposed, but the processing efficiency is extremely low and it is not suitable for mass production.

[The invention tries to solve 1! ! [Problem] The purpose of the present invention is to process gears that mesh in pairs, particularly screw rotors, with higher precision and efficiency than the conventional hobbing machine process. Our goal is to provide a hobbing machine that can. [Means for solving the problem] In order to achieve the above purpose, one hobbing machine is equipped with two hob heads and two tables so that the pair can work simultaneously and reduce mutual errors. .

Moreover, two hob heads are attached to one saddle in order to further reduce mutual errors.

[Effect]

Normally, in hobbing machines, errors in the depth of cut or taper errors occur due to thermal deformation of the bed, collapse of the column, etc. If one hobbing machine is equipped with two hob heads and two tables, and the pairs are processed at the same time, the errors occurring in both will be the same, and as a result, the same quality of processing will be possible, and when combined in pairs, the mutual errors will be reduced. It can be much more functional than processing it alone.

Also, if you attach two hob heads to one saddle,
Errors in the hob head feeding system can also be absorbed, making it possible to perform processing with fewer mutual errors.

〔Example〕

First of all, the f1 of a normal hobbing machine! II'Ii will be explained using Fig. 3. Table 2 and column 3 on top of bed 1
is provided, and the table and/or column can be moved horizontally in the cutting direction. A workpiece 5 is attached to the upper surface of the table 2 by rotating a jig 4. On the other hand, a saddle 6 is attached to the column 3 so as to be movable in the vertical direction, and a hob head 7 is also installed. A hob 8, which is a processing tool, is attached to the hob head 7, and the workpiece is cut using this hob 8. In the case of a hollow workpiece with a narrow tooth width, it is possible to stack several pieces and process them simultaneously, but if the workpiece has a wide tooth width like a screw rotor,
However, each shaft workpiece is machined one by one. An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Figure 1 shows two hob heads 7a on one hobbing machine.
, 7b and two tables 2a, 2b@: are provided. Thereby, the pair can be processed simultaneously, and by being affected by the relative error between the table and the column in common, it is possible to obtain a workpiece with little mutual error.

Figure 2 shows two hob heads 7 at 7 on one saddle 6.
b is attached. As a result, the hob head's upper and lower feed accuracy is also shared, making it possible to obtain a workpiece with fewer mutual errors.

〔Effect of the invention〕

According to the present invention, the male rotor and female rotor of a screw fluid machine can be simultaneously machined as a pair, so that highly accurate and efficient machining with little mutual error can be achieved.

[Brief explanation of the drawing]

1 and 2 are top views (a
) and side view (b), and Figure 3 is a top view (a) of a conventional hobbing machine.
) and side view (b). 1...Bed, 2...Table, 3...Column, 4...Jig, 5...Work, 6...Saddle, 7...Bob head, No. 2 Diagram (cL冫(4冫6 ￥ 3 口(叉ノ(4) 6

Claims (1)

[Claims] 1. A hobbing machine for machining screw rotors, which includes a hobhead, a saddle, a column, and a table, and is characterized by being provided with two hobheads and two tables. 2. The hobbing machine for rotor processing according to claim 1, wherein two hob heads are attached to one saddle.