JPS5813415A - Method and device for forming of rectangular corrugated sheet - Google Patents

Abstract

PURPOSE:To shorten fabrication hours and improve qualities by forming a product preformed by the first stage gears into a rectangular shaped corrugated sheet at the second stage. CONSTITUTION:A plate 11 to be formed is preformed into a corrugated form by a pair of gears 12 and 13 which rotate while meshing with each other. Next, the preformed product 11a preformed in the first stage is inserted between a comb tooth-shaped lower die 14 and an upper die 15 which meshes with the die 14 and is movable up- and down-wards and pressed and formed. A plurality of projected intervals provided on the above dies 14 and 15 is made adjustable. Thus a rectangular-shaped corrugated sheet having good qualities is obtained in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention (d) relates to a method and apparatus for forming a rectangular corrugated plate.

Originally, structures having a large number of rectangular protrusions on the same plane were mainly made by casting or hot casting.

However, in recent years, in order to save resources, save energy, and maintain a sanitary work environment, we have decided to replace the solid structure by casting or hot casting by forming the plate material into a rectangular corrugated sheet P as shown in Figure 1. A method is being used to do so.

Conventionally, methods for forming the rectangular corrugated plate P with deep grooves include a method using one step for each groove and a method using multiple steps for each groove. That is, in the former molding method, as shown in FIG. 2, the plate 1 to be molded is pressed by lowering the upper mold 3 against the lower mold 2, and in this molding method, the material of the unformed part is pressed into the mold. Since the material to be formed has a low tensile strength, there is a risk of it breaking, and since the material is pushed from one side, the residual stress after forming becomes uneven, causing the side of the groove to break. There was a drawback that the edges were warped. -Also, for obvious reasons, molding each groove requires a lot of processing time when there are a large number of grooves. On the other hand, in the latter molding method, as shown in Figure 3, the molded product 1a is first processed using upper and lower molds 4 and 5 with a gentle slope as shown in Figure (\), and then molded as shown in Figure 0. The molded product 1a is formed into the molded product 1b using the upper and lower molds 4a and 5b, which have steep slopes, and finally the molded product 1b is molded into the upper and lower molds 4.
b, 51) to form a rectangular corrugated plate 1c. Although this method avoids the occurrence of warpage on the sides of the groove, it is not suitable for mass production because the molding involves multiple steps.

As mentioned above, the conventional method for forming rectangular corrugated sheets requires a large amount of forming time, and has various drawbacks such as a low product yield and dimensional accuracy due to breakage and curling of the molded product. .

This BA was made to eliminate the drawbacks of the conventional ones as described above, and includes a first step of pre-processing the plate to be formed into a wave shape using a pair of gears that rotate while meshing with each other;
The final product is manufactured in the second step of forming the above-mentioned corrugated plate into a rectangular corrugated plate using a comb-shaped lower mold and an upper mold that can be raised and lowered to engage with the lower mold. The purpose of the present invention is to provide a method and apparatus for forming a rectangular corrugated plate that is mechanically simple and suitable for mass production.

An embodiment of the present invention will be described below with reference to FIGS. 4 to 6. FIG. 4 shows a cross-sectional view of the main part of the first step, which is preforming using gears. In the figure, 11 is a plate to be formed, 11a is a molded product obtained by preforming the plate to be formed into a wave shape using gears, 12 is an upper gear that rotates in the direction of the arrow by a rotary drive device (not shown), and 13 is meshed with this upper gear 12. This is the upper gear. That is, the plate 11 to be formed, which is inserted between the upper and lower gears 12 and 13 that mesh and rotate with each other in the first step, comes out as a preformed product 11a in a wave-like shape.

Figure 5 and Figure 5, ):□',:,9. ．． The figure shows the second step of forming the preformed product 11a into a rectangular corrugated plate. In the figure, 11b is a final molded product obtained by molding the preformed product 11a into a rectangular corrugated plate, and 14 is the rectangular corrugated plate 11b.
The lower mold consists of the same number of pieces as the mountain, 14a is the lower mold 14.
Each of the comb-shaped convex portions separates the convex portions 14a of the lower mold 14, and the crests of the rectangular corrugated plate 11b are formed by these convex portions. Reference numeral 14b denotes stepped portions at the left and right shoulders of each convex portion 14a, and adjacent stepped portions 14b form valleys of the corrugated sheet 11b. 15 is the same number of upper molds as the number of valleys of the rectangular corrugated plate 11b, 15a is each comb-shaped convex part of the upper mold 15, and each convex part is separated from each other,
This convex portion 15a and the stepped portion 14b form a valley of the corrugated sheet 11b. 15b is a step formed on the left shoulder of each convex portion 15a, and this step 15b and the above-mentioned convex portion 14a form the corrugated plate 11b.
form a mountain. 16 is a roller that makes it easy to move each lower mold 14 from side to side; 17 is a push rod that pushes the lower mold 14 to the right by a pressurizing ram (not shown); and 18 is a support rod for supporting the lower mold 14. 19 is a roller for facilitating the movement of each upper mold 15 from side to side; 20 is an upper mold support for supporting the upper mold 15; 21 is provided on the upper surface of this support 20; The block 22 is an elastic body made of rubber or the like, which is also provided on the upper surface of the support base 20, and is higher than the above-mentioned block 21. 23 is a guide rod erected on both end faces of the support base 2°; 24
25 is a pressure ram that pressurizes the pressure plate 24; 26 is a base supporting the support base 18 of the lower mold 14; 27 is each lower mold 14. 28 is a return spring, and 29 is a guide rod that passes through each upper mold 15 and moves this mold 14 from side to side.
30 is a return spring.

Next, the operation will be explained. In Fig. 4, upper gear 1
The center distance between 2 and the upper gear 13 is preliminarily increased by the thickness of the plate 11 to be formed plus a predetermined clearance. In this way, when the upper gear 12 is driven and rotated together with the upper gear 13 and the plate 11 to be formed is inserted between the gears from the left, it is bent into a wave shape as it passes between the teeth of both gears 12 and 13. According to the results of the experiment, the shape of the molded product 11a is the tooth profile of a desired gear. Therefore, in the forming method according to the first step, since forming is performed using rotating gears, the forming operation is performed continuously, and therefore it is possible to make the plate 11 to be formed into a call shape, which is very efficient. Above, since the shape of the molded product 11a is that of a solenoid gear, any tooth profile can be selected when determining the shape of the molded product. It should be noted that the gear molded product 11a has different shapes in the peaks and valleys as shown in FIG. 1, and in the case of a rectangular corrugated plate with deep grooves, the predetermined shape cannot be obtained only by forming from the southeast direction.

Therefore, in a second step, a rectangular corrugated plate is formed in order to form a predetermined shape. 1. In FIG. 5, the ridged portion of the molded product 11a obtained in the first step is placed on the top of the convex portion 14a of the lower mold 14 so as to be circled. After that, the pressure plate 24 is moved to the pressure ram 25.
When the upper mold 15 is moved downward by the operation of
is inserted into the valley part of the molded product 11a and pressurized. When this pressurizing force reaches a predetermined pressure, the pressurizing ram 25 is stopped.

This pressure is continuously applied for a certain period of time by an elastic body 22 disposed between the upper mold support stand 20 and the pressure plate 24.

In this state, when the left end of the molded product 11a is pressed with the push rod 17, the upper mold 15 and the lower mold 1 are pushed through the molded product 11a.
4, both molds contract the return springs 28 and 30 and move along the guide rods 27 and 29, respectively, and finally the 6th mold
As shown in the figure, both molds 14 and 1.5 are engaged and joined together. At this time, the lower mold 14. The upper mold 15 is smoothly moved by rollers 16 and 19. Furthermore, since the molded product 1a is pushed laterally, for example, the pitch between the ridges is reduced, and the depth of the molded product 11a is accordingly increased. Note that as the depth of the molded product 11a increases, the upper mold 15 further descends downward, but a predetermined pressure is applied to the elastic body 22.
Since the load is applied by When the pressure plate 24 is pressurized and the upper mold is lowered with the lower mold 14 joined in this manner, the peaks and valleys of the rectangular corrugated plate 11b are finally processed accurately. At this time, the lowering and pressing of the upper mold 15 is performed via the rollers 19, so that the centering when entering between the lower molds 4 can be automatically adjusted and the process proceeds smoothly. Also, rectangular corrugated plate], 1. Since the load applied to b is transmitted by block 21, the final pressure can be applied reliably.

When the molding is completed in this way, the pressurizing ram 25 is pulled up and the -E mold 15 is moved upward, and the upper mold is moved along the guide rod 29 by the elastic force of the return spring 30 to return to its original state before molding. Return to the position. Next, the rectangular corrugated plates 1 ] and b are taken out from the lower mold 14 and the push rod 17 is returned to the left, and the lower mold 14 returns to its original shape along the guide rod 27 by the elastic force of the return spring 28. Return to previous separated position. In addition, return spring 2
If the free length of 8.30 is set to a predetermined length, the mutual positions of the lower mold 15 and the lower mold 14 will be automatically determined and the state before molding will be achieved.

FIG. 7 shows another embodiment of the second process apparatus according to the present invention. The principle is the same as that described above, but in this case, after the final molding, the upper mold 15 and the lower mold 14 are designed to completely return to their positions before molding. In addition, figure (a
) is a front cross-sectional view of the upper mold 15, and (b) is a side cross-sectional view, but the same applies to the lower mold 14. That is, the sliding movement between the upper mold 15 and the upper mold support 20 is mainly caused by the upper mold 15
The bearing is held by a bearing 32 fitted to a shaft 31 fixed to.

The positioning pin 33 is attached to a hole 20a provided at a predetermined position of the support base 20 via an elastic body 34. Positioning bin 3
The lower end of the bottle 33 is cut diagonally, and when the upper mold 15 is moved for molding, the bottle 33 is attached to the support stand 20.
When the upper mold 15 returns to its original position after molding is completed, the upper mold 1
It enters the hole 15a provided in 5 and is accurately positioned. Incidentally, since the bins 33 are provided in each of the upper molds 15, each upper mold will surely return to its predetermined position.

As mentioned above, in the second process equipment, -
Forming can be done all at once using a set of equipment, and since the forming operation is performed continuously, it is extremely efficient, and since the forming process is effortless, stable processing is possible at all times, producing high-quality rectangular corrugated plates. can.

In the embodiments of the present invention, the gears 12 and 13 are described as standard spur gears, but as long as they rotate, they can be changed to a tooth profile suitable for the shape of the molded product. Dimensions elastic body 22
has been explained using an example using rubber, but the invention is not limited to this. Furthermore, the final molded product, the rectangular corrugated plate, can have any shape other than the deep groove shape shown in FIG. 1, and can have the same effect.

As described above, according to the present invention, a rectangular corrugated plate is obtained by performing preforming using gears in the first step, and then final forming the preformed product in the second step, so that the forming process requires two steps. Ability to perform tasks and operations that require continuous and efficient work. Although it is still a mechanically simple device, it can be used for mass production, so the effects of shortening molding processing time, improving product quality, and ultimately reducing product costs are enormous.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a rectangular corrugated plate, Fig. 2 is a conventional forming method using one step per groove, Fig. 3 is a forming method using multiple steps per groove, and No. 4n is the first step according to the present invention. Figure 5 is a cross-sectional view of the second process equipment before molding; Figure 6 is a cross-sectional view of the 50000 finished, middle 000 cross-sectional view; Figures 7 (a) and (b) are other embodiments of this invention. It is an IF plane sectional view and a side sectional view of a mold showing an example. 11... Board to be formed, 11a... Preformed product, llb
... Rectangular corrugated plate, 12 ... Lower width wheel, 13 ... Upper gear, 14 ... Lower mold, 15 ... Upper mold, 16.19
... Roller, 17 ... Push rod, 22 ... Elastic body, 2
4... Pressure plate, 27° 29... Guide rod, 28.3
0... Return spring, 31... Shaft, 32... Bearing, 33... Positioning pin, 34... Elastic body. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Shin Kuzuno -,・i. Figure 1 Figure 2 Section 3 Procedural amendment (voluntary) Commissioner of the Japan Patent Office 1, Indication of the case Special IQllIi'356 10
9144 No. 2, Name of the invention Method and apparatus for forming a rectangular corrugated plate 3, Table for making amendments (Contact number 03 (2) 3) 342] Patent Department) 5, Detailed description of the invention in the specification subject to amendment Column. 6. Correction details tl+ "Hot casting" on page 2, line 4 "Hot forging"
and correct it. (2) Page 2, lines 6 to 7, “Heat l1iJ casting j ke [corrected as hot fs casting. +31 m3 page 6 line) r top, Tm4 a, 5
b Jk “Correct as upper and lower molds 4a, 5aJ. (4) Correct the 7th negative 1st line “Make the plate to be formed 11 into a call shape” “Use a coil ladle as the plate to be formed 11” do.

Claims (3)

[Claims] (1) A pair of gears that rotate while meshing with each other, a first step in which the plate to be formed is pre-processed into a corrugated shape, and a comb-shaped lower mold and a comb-shaped lower mold, and a first process in which the plate to be formed is pre-processed into a wave shape; A method for forming a rectangular corrugated sheet, comprising a second step of forming a rectangular corrugated sheet by using an upper mold that can be raised and lowered to engage with each other. (2) A pair of gears for preforming the plate to be formed into a wave shape by passing between teeth that mesh with each other, and a plurality of two convex portions that mesh with each other, and the plate to be formed by the preforming A molding apparatus for a rectangular corrugated sheet, comprising a pair of molds that are placed between the convex portions and pressurized to form a rectangular corrugated sheet. (3) The apparatus for forming a rectangular corrugated plate according to claim 2, wherein the distance between the plurality of convex portions of each of the molds is adjustable.