JPS5810451A - Finishing equipment for curved surface - Google Patents

Abstract

PURPOSE:To improve machining accuracy in such a way that grinding stone pieces are fitted to be freely movable upward and slantly against springs onto the rear face of a flange which is installed to be freely movable vertically through a universal coupling so that contacting pressure of the grinding stone pieces to a work is kept constant. CONSTITUTION:A housing 3 is pivotally supported to be freely movable slantly by a shaft 4 on a bracket 2. And, a grinding stone flange 13 is provided through a universal coupling 12 at the lower end of a piston rod 10 which is freely movable up and down, a pluraity of grinding stone pieces 14 are provided to be freely movable upward and slantly against each spring 15 at the rear face of the flange 13. Thus, the grinding stone pieces 14 are tured while being brought into contact with a work (a) under a proper pressure, and are moved along the work (a) while following up freely to the changes a curved surface of the work (a), thus the full area of the work (a) can be machined with high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to an apparatus for finishing a curved surface of a mold using a grindstone.

Conventionally, finishing machining of this type of workpiece has generally been carried out manually, mainly using a sander or the like, which is inefficient and has disadvantages such as inconsistent machining accuracy.

The object of the present invention is to obtain a device free from the disadvantages of the present invention, which includes a rotary cylinder driven by a pneumatic rotary tool and a rotary cylinder that rotates in a housing supported by a bracket, and a rotary cylinder that is rotated by a pneumatic rotary tool. A piston rod is provided inside the piston rod that can be moved up and down and rotated by a piston rod, and a grindstone 7 flange is provided at the lower end of the set with a universal joint valve, and a grindstone piece is moved upwardly against the spring on the lower surface of the 7 flange. It is installed so that it can tilt freely.

An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawing, (1) shows the balance arm, (21Fi) the bracket at the tip, and the housing (2) is attached to the bracket (2).
3J' is pivotally supported by a shaft (4) so as to be tiltable, and can be fixed at an appropriate tilting position by a clamp grip (5). In the drawing, (6) indicates a rotary cylinder that is rotatable within the housing (3), and the cylinder (6)
is connected to a removable pneumatic rotary tool (7) via a gear mechanism (8) and is driven and rotated by the tool (7) K, and the inside thereof further includes a p-tally valve (9) at the top. through which an external source of pressurized air was seated, thus allowing the interior to be maintained at the appropriate pressure by channeling air from the shell source. In the drawing, αI indicates a vertically movable screw inside the cylinder (6): 10, and the nuclear rod α
It is of the type that engages with the cylinder (6) through the ut and rotates with it, and has a whetstone 7 lange 0 connected to it through the universal joint α3 at its lower end, and furthermore, the 7 lange 0 is connected to the cylinder (6) through the universal joint α3. A plurality of grindstone pieces A4, for example three pieces, are provided on the lower surface of the grindstone so as to be tiltable in the upper movable hook against the respective springs α9.

More specifically, the seven langes α are located on the outer periphery of the lower end of the skeleton rod a1, and are arranged on the lower surface at three locations on the circumference, and each grindstone piece α4 is attached via a grindstone holder (14a). did.

To explain its operation, in order to process a mold curved surface or other workpiece a, first the rotary cylinder (6) is rotated and pressurized air is introduced into the cylinder (6). For example, when this is made to straddle the upper surface of the core workpiece a as indicated by the chain line in Figure 1, each grindstone piece a4 rotates with the cylinder (6) while In other words, each grindstone piece α is pressed against the workpiece a with an appropriate pressure and rotates once to finish the workpiece. Thus, by moving this along the workpiece aK, the entire surface of the workpiece aK can be machined, but during such operation, each grindstone piece α
4 is allowed to tilt toward the upper movable hook against the spring α9, and is also allowed to oscillate in the flange 0 of the whetstone 7, thus freely following changes in the curved surface of the skeleton work 1. This can be achieved without any unreasonableness.

In this way, according to the present invention, it is sufficient to simply place the grinding wheel over the workpiece and move it along the workpiece, making the work simple and highly efficient. The grinding wheel piece is pressed against the workpiece by keeping the pressure constant at all times to improve machining accuracy, and the grinding wheel piece also allows tilting of the upper movable hook against the spring and neck vibration due to the universal joint. It has the effect of well following changes in the curved surface.

[Brief explanation of drawings]

Figure 1 is a front view of one example of the device of the present invention, and Figure 2 is a VW
3 is a side view thereof, and FIG. 4 is a sectional view taken along the line IV--IV of FIG. 2. (2)...Bracket (3)...Housing (61...Rotary cylinder Ql...Piston red 0ri...Universal joint 03...Whetstone 7 lange A4-/Whetstone piece 0!9 ...2 people outside the spring

Claims (1)

[Claims] A rotary cylinder that is driven by a pneumatic rotary tool or the like to rotate, and a piston rod that is movable up and down inside the cylinder and rotates with the cylinder are provided in the housing that is supported by the racket. A finishing device for a curved surface, in which a grindstone 7 flange is provided via a universal joint, and a grindstone piece is attached to the lower surface of the 7 flange in an upwardly movable and a tilting milling manner against a spring.