JPH01121168A - Rocking type free abrasive grain finisher - Google Patents

Abstract

PURPOSE:To make a groove base for a dovetail groove, a T-slot or the like accurately finishable in an automatic manner by installing a mechanism for making a surface plate perform its rocking motion in a direction to be crossed in direction of relative motion between the surface plate and a workpiece. CONSTITUTION:Abrasive grains or three grains and grinding fluid are interposed between a surface plate and a workpiece. In this state, a motor 4 is driven, an eccentric shaft 7 is rotated via a reduction gear 5 and gears 6a, 6b, and the surface plate 1 is rocked in a direction to be crossed in direction of relative motion between the surface plate 1 and the workpiece 2. With this rocking motion, a grindstone 8 attached to the surface plate 1 is rocked up to a corner part 9 of a groove base formed in the workpiece 2, and the groove base is uniformly polished for finishing by this grindstone 8.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to free abrasive processing used for precision finishing of surfaces, and in particular to an oscillating free abrasive grinder suitable for processing dovetail grooves, T-shaped grooves, etc. This relates to grain processing equipment.

[Conventional technology]

Conventional surface finishing equipment performs mechanical finishing on flat workpieces, but it is suitable for machining groove bottoms where the groove bottom is wider than the groove entrance, such as dovetail grooves and T-grooves. Traditionally, finishing has been done manually. Note that related devices of this type include, for example, Japanese Patent Application Laid-Open No. 59-227367.

[Problem that the invention seeks to solve]

4. The above-mentioned conventional technology does not take into account the machining of the groove bottom corner, and the finishing of the groove bottom is done manually, which prevents access to the groove bottom corner, resulting in poor workability. In addition, there were problems in ensuring finishing accuracy, such as the fact that the bottom surface of the groove could not be uniformly machined because it depended on the skill level and sensitivity of the operator.

SUMMARY OF THE INVENTION An object of the present invention is to provide an oscillating free abrasive processing device that automates precision finishing of groove bottoms such as dovetail grooves and T-grooves and enables uniform processing.

[Failure to solve the problem]

7. The above purpose is to oscillate the surface plate in a direction perpendicular to the direction of relative motion between the surface plate and the workpiece, using a swing-type loose abrasive processing device using a boater with a reduction gear, gears, and eccentric pins. This is achieved by performing a dynamic movement and finishing the surface of the bottom of grooves such as dovetail grooves and T-grooves.

[For production]

The oscillating free abrasive processing device interposes abrasive grains or abrasive grains and grinding fluid between the surface plate and the workpiece, drives a gear from a motor via a reducer, and further rotates an eccentric shaft. This gives an oscillating motion to the surface plate between the surface plate and the workpiece.

As a result, the grindstone attached to the surface plate can be swung to the corner of the i-bottom, allowing for uniform finishing.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. In FIG. 5, the rotating arm 1 is
1 is rotated to give relative motion in the circumferential direction between the surface plate 1 and the workpiece 2, and a swing-type free abrasive processing device is installed at the tip of the swing arm 11, and the groove bottom surface 3 of the workpiece 2 is rotated. The surface of the groove bottom surface 30 of the workpiece 2 is finished by oscillating the surface plate 1 and the workpiece 2 in a direction that intersects the direction of the relative motion of the surface plate 1 and the workpiece 2 using abrasive grains or abrasive grains and a grinding fluid. . FIG. 1 shows details of the n section of the oscillating free abrasive processing device. The rotation of the motor 4 is transmitted to the eccentric shaft 7 via the reducer 5 and gears 6a and 5b. The motor 4 with the reducer 5 and the eccentric shaft 7 are installed at the tip of the next arm 11, and the eccentricity of the eccentric shaft 7 (e) 13-2
Double the stroke is given to the surface plate 1 as the amount of rocking. A predetermined grindstone 8 is fitted into the surface plate 1. In addition, the eccentric shaft 7
The distal end thereof engages with the surface plate l via a bearing 14, and the eccentric shaft 7 and the swing arm 11 are supported via a bearing 15 so that the eccentric shaft 7 can rotate. According to this embodiment, the finishing of corners such as grooves and T-cuts can be performed automatically, so uniform surface finish accuracy can be ensured without requiring operator skill or sensitivity, and the work time can be reduced. This has the effect of significantly shortening the time. Furthermore, by making the amplitude of the rocking motion variable, there is an effect that machining that can respond to changes in the size of the workpiece is possible.

〔Effect of the invention〕

According to the present invention, the aIl!
It has the effect of automating the X-finishing process and achieving uniform processing.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the oscillating free abrasive processing device of the present invention;
Fig. 2 is a sectional view taken along line H-■ in Fig. 1, Fig. 3 is a sectional view of the dovetail groove of the workpiece, Fig. 4 is a sectional view of the T-groove of the workpiece, and Fig. 5 is the swing of the present invention. FIG. 2 is a schematic diagram of a large processing device using a type a abrasive processing device. 1...Surface plate, 2...Curved plate workpiece, 3...Four groove bottom surface, 4...Motor, 5...Four reducers, 6a, 5
b...Face gear, 7...Eccentric shaft, 8...Curved grindstone,
9...Curved corner part, lO...Curved arm rotation table%11...
Curved swivel arm, n-curved swinging free abrasive processing equipment・4・

Claims (1)

[Claims] 1. A free abrasive that performs surface processing by interposing abrasive grains or abrasive grains and a grinding fluid between the surface plate and the workpiece, and giving relative motion to the surface plate and the workpiece. In grain processing equipment, in the direction intersecting the direction of relative motion between the surface plate and the workpiece,
An oscillating free abrasive processing device characterized by being provided with a mechanism for oscillating a surface plate. 2. In claim 1, the mechanism is a surface plate in which a motor with a speed reducer and an eccentric shaft with a gear are provided on a rotating arm, and a grindstone is inserted into one end of the eccentric shaft with a gear through a bearing. An oscillating free abrasive processing device characterized by being pivotally supported.