JPS5890325A - Cutting method for plate - Google Patents

Abstract

PURPOSE:To enable cutting in a short time through plastic working by pressing of a thick plate material in cutting a thick plate material such as a flange part of a plate spoke wheel by using a general purpose press having specified structure. CONSTITUTION:In a general purpose press, an upper tool 18 and a lower tool 14 having tip edges 18a, 14a are attached to an upper die and a lower die respectively to constitute a plastic working die for cutting. Further, an upper die 17 and a lower die 13 are held in vertical direction allowing sliding and the upper die 17 is enabled to make vertical relative movement in relation to the upper tool 18 by a hydraulic cylinder incorporated in the upper die. At the same time, a spring 37 of the lower die 13 is enabled to make vertical relative movement in relation to the lower tool 14 by air pressure. In cutting by plastic working, after working a V-groove for cutting outline by edges 18a, 14a of the upper and lower tools, the upper die 17 is pressed downward by the cylinder 20, and the thick plate is cut along the V-groove.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cutting plate materials, particularly thick plate materials.

For example, in a wheel with many loose spokes,
The flange of the rim is used to fasten the spokes and rim, but as long as it does not impair the required wheel strength,
In order to reduce the weight of the wheel, it is necessary to cut and remove a portion of the flange due to design considerations. (Figure 1)
Therefore, conventionally, cutting using a milling machine or the like has been used to remove a portion of the seven flange portions, but the machining time is long and the -3 stroke becomes very high.

Therefore, a method using plastic working can be considered,
As a processing method similar to removing part of the flange part, notching the valve seat by plastic processing is currently being performed. There is an immovable state IIK, and after processing the area KV groove to be removed with the first pair of tools and reducing the wall thickness, by decreasing the pressure of one tool or increasing the pressure of the other tool, the V This method involves shearing the groove. If the flange section were to be suppressed and sheared using the above method, a large high-pressure press would be required, unlike when removing a relatively small volume such as a valve seat notch.
Moreover, general general-purpose presses cannot be used, and a double-acting high-pressure press with reverse insertion, such as a fine blanking press, must be used, and because of the reverse insertion, it is inconvenient to remove chips. be.

Therefore, the present invention uses a general-purpose press to suppress and shear thick plate materials such as the flange portion, and aims to shorten the processing time and to improve the plasticity of the plate material with the aim of facilitating the removal of sheared chips. This is a cutting method by processing.

The following is an example of the cutting method according to the present invention.

Taking cutting of a flange portion as an example, a detailed explanation will be given based on the drawings.

First, to describe the configuration of the mold used in the cutting method according to the present invention, it is made into a gusset as shown in the assembly diagram in Figure 3, and the lower mold has a lower padding on the lower pace (//). (
/J) and then the lower stand (sword).

The upper tool (/4Qt) is fixed, and the lower die (/3) is slidable in the vertical direction as a guide on the outer circumference of the lower stand (23).
It is supported downwardly by a knockout bin (33) K via a spring (J7) or air pressure, while the upper 1iK
The upper puffkin (/6) is joined under the upper pace (/ri), and the upper stand (7) and upper tool (/L!r) are fixed,
Outer circumference of the base (song) Kti upper die (/7) t guide (
1) as the guide surface in the vertical direction KfI! It is movably attached.

There is a cavity in the center of the upper pace (β), and the upper pace (/
6) Insert and fix a block (/ri) in the connection with the block (/ri), insert a hydraulic cylinder CI)) into the outer periphery of the block (/ri), penetrate the upper gasket (/4), and insert the 9-bin (J/). The upper die (/) is inserted into the guide (U) and is slidable.
7) IlcI! It matches.

The upper tool (/I) and the upper tool (/4t) can be used for (/o) (/ff) and (/o) as shown in (a) and (b) in Figure 3, depending on the shape of the flange to be removed. 4) (/1
ffi), and the tool may be easily removed depending on the size and type of the rim, as well as due to wear of the tool.

The base (main and lower stand (23)) [fixed with bolts (K). The above-mentioned mold is attached to the bolster of a general press (regardless of whether it is a hydraulic press or a mela press)) and a ram (lower mold, The upper mold is a wood guide pole.In order to explain the press shearing method for the flange part using the mold, the mold attached to the upper tool (/l
) and the upper tool (/), remove the inserted guide pole (x) from the guide hole (J'), insert the rim (1), and remove the lower die (/3) from the fixed stopper guide C2. ), and then fix the rim (1) in place with the movable stopper guide (3/) sliding by the air cylinder (305K), press or ram (→
Due to the movement of , the upper die and lower die approach the next 111, and the upper tool (
/l), press the upper tool (/ri's edge (zza) (/A) [therefore on the flange part to be removed), and machine KV grooves on both sides of the 7/edge part Sakaki. (Depending on the workpiece material, a KV groove may be provided on only one side.) However, even if only the earth tool (/r) and upper tool (/4t) as mentioned above are machined with high pressure by K, there will be no gap between the drawing tools. A small amount of the inside remains, and it cannot be used as a shearing edge for the flange part to be removed.On the other hand, if the remaining wall thickness is reduced by pressing with the upper tool ('r) and the upper tool (/41) K, As the tool surface pressure increases, the life of the tool becomes extremely short, so the reduction in wall thickness due to the compression is suppressed to a certain extent, and then the reduced wall thickness is removed by shearing. The gold INK reduces wall thickness to control
The upper and lower WiK have a lifter (34Q) attached to the upper packing (/j;) and the lower packing (/2).

In addition, if it is a hydraulic press, the movement of the ram (b) is temporarily stopped at the final point of pressing, and if it is a mechanical press, the movement of the ram (b) is taken into consideration and the pressure is pressed. At the final point in time, the cylinder (J) built into the upper pace (β)
)) to the oil sump (3) K by applying hydraulic pressure and sliding it into the bottle (
The upper die (/7) is pushed down via the upper die (/7) and the rim (4 ear (applied to 45, reduced flange part by pressing) is sheared.During this shearing, the upper tool (/41) remains stationary. Ashi, by the movement of the upper die (/7), the rim (4,
Stopper guide (29)% ′-stratification←
■ To 11 (11・t also comes, movable stopper guide (J/) s air cylinder (2) and lower die (/3) and lower die (/3)
) is also moved at the same time. The sheared flange part) has an air hole (
The air that passes through the
, the lower packing (/2) and the lower pace (//) are provided in the center and fall through the nine cavities (Otsu), while the upper mold falls through the ram (→
The K-air is raised by the movement of the ring-shaped air chamber (J4) provided between the guide (22) and the upper die (/7). Feed it up and return the cylinder (2) to its original position through the bottle (#) t-. Air cylinder (J
)) Release the movable stopper guide (3/) from K and take out the rim (1) cut into a predetermined shape. Although cutting has been described, it is performed as described above using the above-mentioned gold 11, and the following effects can be obtained.

(1) Compared to the conventional cutting process using a milling machine, etc., it is a major advantage in plastic working that the process can be performed in a very short time. The process consists of two types of processes: a suppression process using an upper tool and a shearing process using an upper die, but it does not require a high-pressure or high-load double-acting press, and can be used in a general-purpose press. It is possible to process it using

(Ugami) Also, the lower part of the mold has a large cavity in the center, and the flange part removed by compression and shearing is
Air injected from the air hole can pass through the cavity and fall downward, and if a scrap conveyor or the like is installed under the press body, no human power is required to process the flange portion, that is, the scrap to be removed.

(b) Furthermore, the processing method varies depending on the type of rim size.
It is possible to correspond by changing only the upper tool, the upper tool, the base, the lower stand, the upper die, the lower die, and the stop horn (-guide) of the above-mentioned mold.

(b) Above, we have described examples of how this processing method is used, limiting it to the suppression and shearing of the rim and flange, but the scope of application of this processing method is very wide, and since the processing is suppressed before shearing, it is generally used. The processing method according to the present invention is very useful for a wide range of plastic processing, as it does not generate dust, which is a big problem with shearing, and is suitable for ordinary punching, especially for punching thick plates. .

[Brief explanation of the drawing]

Fig. 1 shows a plate spoke rim, Fig. 2 shows an embodiment of the conventionally used lub seat notch method, and Fig. 3 shows a mold used for processing according to the present invention. (a) shows the lower mold; (e) shows the front view and cross-sectional view of the upper and lower molds; and d) shows the side view. Patent applicant Daido Kogyo Co., Ltd. Agent Hikoji Hirasaki Figure 1 Figure 2

Claims (1)

[Claims] In the cutting process of plate materials, especially thick plate materials, by plastic working,
An upper tool (/l) and an upper tool (/4t) having a tip of 111 IK edge (/, ja), (/guhata) are fixed to the upper mold and lower mold, and the upper die is further slidable in the vertical direction. (/7)
and the lower die (/J), and hold the upper die (/7).
Hydraulic cylinder (20) with K built into the upper mold.
The upper tool (/7) is capable of relative movement in the vertical direction with respect to K, and the lower die (/3) has a t-spring (,?7).
) or a mold that allows vertical movement relative to the upper tool (/) using air pressure. First, the upper mold attached to the ram (→ The contour to be cut is machined using the edges (71 &) and (/Rin) K of the upper mtc tool (/l) and the lower 5.c tool (/4t) on one or both sides of the workpiece material, and then the cylinder ( A method for cutting a plate material, characterized in that the upper die (/7) is lowered by the operation of the J+) and the plate material thinned by V-groove processing is sheared.