JPH03189101A - Preparation of wooden frame - Google Patents

Abstract

PURPOSE:To prepare simply and in a short time a wooden frame with a three dimensional shape wherein a curved face is smoothly changed by processing the wooden frame from the inner and outer sides thereof while the width of the wooden frame is changed by using two-dimensionally movable router bits. CONSTITUTION:At first, eight pieces of wood pieces are adhered to form a wooden frame 1m and a groove 1a wherein a glass and a supporting plate are fitted is formed on the bottom face. Then, the traces which router bits 2 and 3 for processing the inner and outer sides of the wooden frame should follow are stored in an NC router which is exclusively used for two dimensional processing. Then, the wooden frame 1m before processing is fixed on a table and the router bit 2 for processing the inner side is fitted on a jig chuck to perform a processing on the inner side face 1b of the wooden frame 1m while the router bit 2 is two-dimensionally moved in following the stored trace line and to form thereby a processed face 1c. Then, the bit 2 for the inner side and the router bit 3 for processing the outer side is fitted on a jig chuck to perform a processing on the outer side face 1d of the wooden frame 1m in the same way as the proceeding procedure in following the stored trace line and to form thereby a processed face 1e.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of manufacturing a wooden frame used for a watch frame, a mirror frame, etc.

[Prior art] Conventionally, when forming a three-dimensional shape on a wooden frame such as a clock frame or a mirror frame, a three-dimensional NC router is used to change the bit position vertically, horizontally, and heightly. In some cases, a swinging motion was also added to form a three-dimensional shape. In addition, the ball bit shown in Figure 9 is attached to a two-dimensional NC router, and one plane is machined at one height position, and then another plane is machined at another height position. In some cases, a three-dimensional shape was formed by changing the height each time.

[Problem to be solved] However, when using a 3D-dedicated NC router, a very expensive capital investment is required, and there is a problem that the capital investment cannot be made if the production quantity of wooden frames is small. Ta.

Furthermore, when attaching a ball bit to a two-dimensional NC router, the bit moves a lot, so the machining time takes a long time, and since the vertical movement is not continuous, the machining surface becomes wavy, which increases the polishing time. If a large width is applied and the tip of the bit is used to grind, there is no circumferential speed, so fuzzing and scuffing are likely to occur, and in this case, there is a problem in that extra polishing time is required.

SUMMARY OF THE INVENTION An object of the present invention is to easily and quickly form a three-dimensional wooden frame by simply moving router bits two-dimensionally.

[Means for Solving the Problems] In order to achieve the above object, the wooden frame manufacturing method of the present invention processes a wooden frame while moving a router bit two-dimensionally from the inside and outside of the wooden frame. At this time, by changing the width of the wooden frame, a three-dimensional shape is formed on the wooden frame by changing the intersection position of the surfaces processed by the inner and outer router bits, and changing the height of the intersection position. That's how it is.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

In this example, a wooden frame for a wall clock is manufactured.

First, as shown in Figures 3 and 4, eight pieces of wood are glued together to form a 1 m wooden frame. Next, as shown in the second figure, a groove 1a for attaching a glass (not shown) and a support plate (not shown) is formed on the bottom surface of this wooden frame 1m by a predetermined method.

Next, as shown in FIGS. 5 and 6, a router bit 2 for processing the inner surface 1b of the wooden frame 1m and a router bit 3 for processing the outer surface 1d of the wooden frame 1m are prepared. The shape of the grinding surface 2a of the internal router bit 2 is such that the grinding surface progresses outward as it goes upward. Similarly, the shape of the grinding surface 3a of the outside router bit 3 is such that the grinding surface progresses outward as it goes upward.

Next, a two-dimensional dedicated NC router (not shown) stores the trajectories that the router bits 2 and 3 for inner and outer machining should follow within the plane of the table (not shown). At this time, the processing surface of the wooden frame body 1m processed by the grinding surface 2a of the router bit 2 for inner processing and the router bit 3 for outer processing
The grinding surface 3a intersects with the processing surface of the wooden frame 1m to form the top of the mountain, and the router bit 2 for inner processing and the router bit 3 for outer processing It is stored so that the width between the trajectories traced with changes along the trajectory line.

Next, fix the unprocessed wooden frame 1m on the table, for example,
First, attach the router bit 2 for inner machining to a jig chuck (not shown), and while moving the router bit 2 two-dimensionally according to the memorized trajectory line, move the router bit 2 to the wooden frame as shown in the seventh figure. Processing is performed on the inner surface 1b of 1 m, and the processed surface 1c
form.

Next, remove the bit 2 for the inside, attach the router bit 3 for outside machining to the jig chuck, and similarly follow the memorized trajectory line to the outside surface of the wooden frame 1m as shown in Figure 8. 1d is processed to form a processed surface 1e. At this time, since the width between the trajectories traced by the inner router focus 2 and the outer router bit 3 is made to change along the trajectory line, in the place W where the width between the trajectories is wide, the machined surface 1c
The intersecting position H between the machining surfaces 1c and 1e becomes high, and the intersecting position H between the machined surfaces 1c and 1e becomes low at a place N where the width between the trajectories is narrow.

The wooden frame 1 in Figures 1 and 2 processed by the above method has a narrow width (N) where the height L of the wooden frame is also lower, and where the width of the wooden frame is widened, the wooden frame 1 is The height H of the frame is increased, and the wooden frame becomes constricted and has an undulating shape, resulting in a beautiful three-dimensional shape.

In the above embodiment, the router bit 2 for inside machining and the router bit 3 for outside machining were of different shapes.
The same bits may be used. Furthermore, in the above embodiments, all the bits were shaped to move outward as the grinding surface went upward, but the router bit 2 for inner machining was shaped to move outward as it went upward, and for outer machining The router bit 3 may have a shape that moves inward as it goes upward, and the angle may be gentler than the angle of the grinding surface of the router bit 2 for inner machining. This results in a processed surface shape of the wooden frame that expands outward. In this way, various shapes of the bit can be considered.

Furthermore, in the above embodiment, both the router bit 2 for inner processing and the router bit 3 for outer processing have machining trajectories stored, but for example, the outer surface 1d of the wooden frame 1m
When machining, a copy chamfering cutter machining may be used.

Further, in the above embodiment, the unprocessed wooden frame 1 m was formed by laminating a plurality of wooden pieces together, but a single solid board, verticle board, etc. may also be used.

[Effects] The present invention uses a router bit that moves two-dimensionally from the inside and outside of the wooden frame to process the wooden frame while changing its width. It is possible to manufacture a wooden frame having a three-dimensional shape whose curved surface changes smoothly. Furthermore, since machining can be performed at a higher circumferential speed with a molded bit, the machined surface becomes cleaner and polishing in subsequent steps becomes easier than when using a ball bit.

[Brief explanation of drawings]

Figures 1 to 8 show one embodiment of the present invention.
Figures and Figure 2 are the plan view and A- of the completed wooden frame, respectively.
A sectional view taken along line A, Figures 3 and 4 are a plan view and a sectional view taken along line B-B of the wooden frame before machining, respectively. Figure 5 is a front view of the router bit for inside machining, and Figure 6 shows the outside. Router for processing
A front view of the bit, Figure 7 is a sectional view showing a wooden frame being machined with a router bit for inside machining, and Figure 8 is a state in which a wooden frame is being machined with a router bit for outside machining. 9 is a front view of a conventional ball bit, and FIG. 10 is a sectional view showing a wooden frame being processed using the ball bit of FIG. 9. 1...Wooden frame, 1b...Inside of the wooden frame, 1c...Surface processed by the inner router bit, 1d...Outside of the wooden frame, 1e...By the outer router bit Processed surface, 1m... Wooden frame before processing, 2.3... Router bit, H... High intersection position of machined surface, L... Low intersection position of machined surface, N... Narrow part of the wooden frame, W... wide part of the wooden frame. Above 3-p ±stain stain

Claims (1)

[Claims] The wooden frame is machined while moving the router bit two-dimensionally from the inside and outside of the wooden frame, and at this time, by changing the width of the wooden frame, the surface to be machined by the inside and outside router bits can be changed. A method for manufacturing a wooden frame, comprising changing the height of the crossing position while changing the crossing position to form a three-dimensional shape in the wooden frame.