Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1984-12-28
1987-01-27
Schmidt, Frederick R.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51123G, 51 95GH, B24B 300
Patent
active
046385991
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a gear grinding machine for producing radially or helically toothed spur gears.
From the state of the art there is known a gear grinding machine of this general type which operates according to the generation grinding process (U.S. Pat. No. 4,512,109, issued Nov. 23, 1985 to van de Locht). This prior art gear grinding machine is provided with a rocking drive including an arcuate rolling member and a clamping fixture, and an auxiliary slide coupled to the main slide is linked to a sliding element which is movable in a guide slot. The guide slot is angularly adjustable on the machine bed for determining the side of the base circle diameter of a gear being machined.
It is also generally known to construct gear grinding machines so that they operate according to the formed-wheel grinding process. Such machines are of a special construction suitable to execute gear grinding by the forming process.
By contrast, the object of the present invention is to create a gear grinding machine of the type first referred to in the above which machine is, in a simple manner and without requiring any elaborate changeover, capable of performing both generation and form grinding of gears.
This is accomplished according to the invention in that for the optional employment of the machine for form grinding the guide slot is adapted to be angularly adjustably moved into a position, and locked therein, which is parallel to the direction of movement of the auxiliary slide, that the work slide is mounted on a vertically adjustable slide, and that the auxiliary slide is operable according to the position of the vertically adjustable slide in dependence of the helix angle and the data of a gear.
This has the advantage that a gear grinding machine is created in a convenient manner, which machine is capable of operating according to both the generation and the forming process. In the forming process, the main slide is at rest. The motion of the auxiliary slide merely causes the belt drive to impart rotational motion to the arcuate rolling member, leading to an angular adjustment of the directional position of the guide slot of the sliding element to thereby set the machine up for form grinding.
While it has been proposed heretofore to provide a gear grinding machine with a vertically adjustable slide for angularly adjustably mounting the grinding wheel carrier thereon, this known structure is used for form grinding only and no provision is made for the machine to also operate as a generation grinder.
In further developing the invention, the direction of movement of the auxiliary slide may run at an angle of 45.degree. to the direction of movement of the main slide, and the direction of movement of the sliding element is also at an angle of 45.degree. relative to the direction of movement of the main slide.
According to another feature of the invention, incremental acceleration or deceleration of the rotation of the workpiece table may be attained by the interposition of electronic control means, whereby such incremental speeding up or slowing down of the rotational speed of the workpiece table during the motion of the work slide is variable. Thus, in a simple fashion, chip formation is effected according to the desired direction (left or ride side of the tooth profile). In addition, cambering of the left or right tooth side is easily accomplished.
The invention will be further described in the following with reference to one embodiment illustrated in the drawings, in which:
FIG. 1 is a top plan view of a diagrammatically shown basic construction of the rocking drive mechanism;
FIG. 2 is a diagrammatic view of a gear grinding machine, showing the work slide in a frontal view and the main slide in a top plan view.
FIG. 1 illustrates diagrammatically a basic construction of the rocking/rolling drive mechanism according to the invention. This rocking drive mechanism 1 comprises a main slide or saddle 2 and an auxiliary or cross slide 7. The main slide 2 is mounted in guides 3 on the machine for advancing and r
REFERENCES:
patent: 4393625 (1983-07-01), Bloch et al.
patent: 4512109 (1985-04-01), van de Locht
Rose Robert A.
Schmidt Frederick R.
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