JP5136135B2 - Sheet metal processing method - Google Patents

Description

  The present invention relates to a sheet metal processing method, and more specifically, cuts the outer shape of a cut product from a plate-like base material by leaving at least one support joint by laser cutting, and the cut product is stable and accurate. The present invention relates to a sheet metal processing method capable of performing a high bending process.

  Conventionally, the outer shape of the cut product is cut from the plate-shaped base material by laser cutting, leaving at least one support joint, and then the cut product is continuously bent by press and automation and automated. Processing methods are known (see, for example, Patent Document 1 and Patent Document 2).

However, in the case of a shape (for example, a two-dimensional shape or a three-dimensional shape) in which a wrinkle is generated in a cut product when it is bent by press processing of the cut product (for example, a two-dimensional shape or a three-dimensional shape), There is a problem that it is difficult to obtain a desired product shape due to interference with a cut product, and stable bending cannot be performed. In particular, when a large number of products are continuously bent while being automatically fed, there is a problem that the product interferes with the base material or the product accuracy is affected if the positioning is not accurate.
JP 2001-277058 A JP 2000-158166 A

  This invention pays attention to such conventional problems, and when bending a cut product cut by laser cutting, it is possible to perform high-precision bending in a stable state without interfering with the base material. It is an object of the present invention to provide a sheet metal processing method capable of continuously transferring and continuously performing sheet metal processing.

In order to achieve the above object, the present invention cuts the outer shape of a cut product by leaving at least one support joint from a plate-like base material by laser cutting, and then bending the cut product in the next step In the method, when the outer shape of the cut product is cut from the base material by laser cutting, a cutting outer portion of the cut product to be bent in the next step is provided with a cutting gap that does not interfere with the base material, and laser cutting from the base material When cutting the outer shape of the cut product by processing, a positioning pilot hole is formed in the base material for automatic product feed simultaneously with cutting of the cut product, and the support product is deformed when bending the support joint. The gist is to provide a plurality of portions including a portion with a small amount and a portion with a large deformation .

  Here, when cutting the outer shape of the cut product from the base material by laser cutting, a positioning pilot hole is formed in the base material for automatic product feeding simultaneously with the cutting of the cut product, and the support joint is This is a sheet metal working method provided at a plurality of locations of a portion with little deformation and a portion with great deformation of the cut product when bending.

  Furthermore, it is also possible to use the sheet metal processing method described above for a tire molding die blade that is two-dimensionally processed or three-dimensionally processed.

  With this configuration, it is possible to perform highly accurate bending processing in a stable state without interfering with the base material.

The present invention as described above, when cutting the outer shape of the cut product by laser cutting from the base material, provided with a cutting gap which machining contour of the cutting products bending in the next step does not interfere with the base material, the base When cutting the outer shape of the cut product from the material by laser cutting, a positioning pilot hole is formed in the base material for automatic feed of the product simultaneously with the cutting of the cut product, and when the support joint is bent By providing it at multiple locations, one where the deformation of the cut product is low and the other where the deformation is large, when bending a cut product that has been cut by laser cutting, it is stable and highly accurate without interfering with the base material. Bending can be performed, and further, there is an effect that sheet metal processing can be performed continuously by continuously transferring.

  In addition, even a product such as a molding blade for a studless tire having a drawing can be easily subjected to sheet metal processing combined with laser cutting and press processing, and workability and productivity can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 (a), 1 (b) to 3 (a), 3 (b) show process explanatory diagrams of the sheet metal working method of the present invention, and FIGS. 1 (a), 1 (b) show mothers such as metal plates. FIG. 2 is a plan view of a cut product W obtained by laser cutting from a material 1 with a laser processing machine (not shown), and a cross-sectional view of a state in which the cut product W is placed on a mold 2a of a press machine 2 to be bent. (A), (b) is a plan view of a semi-finished bending process (two-dimensional processing, etc.) of the cut product W and a state where the semi-finished bending process is performed on the dies 2a, 2b of the press machine 2 to be bent. FIG. 3A and FIG. 3B are a plan view and a bending process of a finished bending process (two-dimensional processing, three-dimensional processing, etc.) of the cutting product W. Sectional drawing of the state which mounted the finished cut product Wb which performed the bending process on metal mold | die 2a, 2b of the press machine 2 to perform It is.

  In the embodiment of the present invention, when the outer shape of the cut product W is first cut from the base material 1 such as a metal plate by a laser processing machine (not shown), at least one (three in this embodiment) support joints. The outer shape is cut leaving 4a, 4b, 4b, and when the outer shape is cut, the processed outer portion of the cut product W to be bent in the next step (semi-finished bending step) is deformed, and the base material 1 A cutting gap h that does not interfere with is provided for cutting.

  That is, the cutting gap h is obtained by measuring the amount of deformation of the cut product W when the cut product W cut from the base material 1 is bent and processed by the press machine 2 (bending machine) in the next process. The cutting gap h is formed with a dimension corresponding to the amount of deformation.

  Further, when the outer shape of the cut product W is cut from the base material 1 by laser cutting, a positioning pilot hole 3 for automatic product feeding is formed in the base material 1 simultaneously with the cutting of the cut product W. Is desirable. Further, the support joints 4a, 4b, 4b need to be provided at a plurality of locations of a portion 4a having a small deformation and a portion 4b, 4b having a large deformation when the bending process is performed. On the other hand, the cut product W is held, and the portion 4a with particularly little deformation is cut in the final punching step.

  For example, a plurality of cut products W (in this embodiment, five cut products W are shown) are laser-cut from one base material 1 to perform two-dimensional processing (bending step 1: bending of semi-finished product Wa) Process) and three-dimensional processing (bending step 2: bending step of the finished product Wb), as shown in FIGS. 6 (a) and 6 (b), from the base material 1 to the laser processing machine (FIG. The outer shape of the cut product W having a predetermined shape is cut by a not shown). At this time, as described above, the outer shape of the cut product W is laser-cut while leaving the support joints 4a, 4b and 4b, and the positioning pilot hole 3 for automatic product feed is formed simultaneously.

  Next, the base material 1 of the cut product W that has been laser-cut while leaving the support joints 4a, 4b, and 4b is sequentially inserted into the first process, the second process, and the punching process of the press machine 2 to be bent first. In the process, as shown in FIGS. 6A and 6B, a semi-finished product Wa is manufactured by performing two-dimensional processing (bending process 1) on the molds 2a and 2b from the first cut product W. Then, in the second bending step, the finished product Wb is manufactured by performing three-dimensional processing (bending step 2) on the molds 2a ′ and 2b ′.

  When the bending steps 1 and 2 are performed, by providing a cutting gap h between the base material 1 and the cut product W that has been cut in advance as described above, the cut product W is deformed during bending. However, the deformed portion can be easily bent without interfering with the cut-out portion of the base material 1, and the bending accuracy can be maintained. Further, the feeding and positioning of the base material 1 can be performed accurately by using the positioning pilot holes 3 formed in the base material 1 in advance.

  The sheet metal working method as described above is effective when used for a tire molding die blade having two steps or three or more steps in terms of the number of presses, and is not particularly limited to the tire molding die blade.

  Since the present invention performs sheet metal processing by the method described above, when bending a cut product cut by laser cutting, it is possible to perform highly accurate bending in a stable state without interfering with the base material. In addition, the sheet metal can be continuously processed by continuously transferring.

  In addition, even for products such as molding blades for studless tires with a drawing, it is possible to easily perform sheet metal processing combining laser cutting processing and press processing, and to improve workability and productivity. .

(A), (b) is a plan view of a cut product obtained by laser cutting a base material such as a metal plate with a laser processing machine (not shown), and the cut product is mounted on a die of a press machine for bending. It is sectional drawing of the state put. (A), (b) is a plan view of a semi-finished bending process (two-dimensional processing, etc.) of a cut product and a semi-finished cut product in a state where the semi-finished bending process is performed on a die of a press machine to be bent. It is sectional drawing of the state which mounted. (A), (b) is sectional drawing of the state which mounted the semi-finished cut product of the state which performed the semi-finished bending process on the metal mold | die of the press machine to be bent and the bending process of a cut product It is. It is the top view which cut | disconnected the external shape of the some cutting product to the base material with the laser processing machine. It is process explanatory drawing of the process of bending a cut product with a press machine. (A) is the top view of the base material of the laser cutting process with respect to a base material, the bending process 1, and the bending process 2, (b) is sectional drawing of the bending process 1 and the bending process 2 of a cut product.

Explanation of symbols

1 Base material 2 Press machine 2a, 2b Die 3 Positioning pilot hole 4a, 4b Support joint W Cutting product Wa Semi-finished cutting product Wb Finished cutting product h Cutting gap

Claims (2)

In the sheet metal working method of cutting the outer shape of the cut product leaving at least one support joint from the plate-like base material by laser cutting, and bending the cut product in the next step,
When cutting the outer shape of the cut product from the base material by laser cutting, the cutting outer shape of the cut product to be bent in the next process is provided with a cutting gap that does not interfere with the base material, and cutting from the base material by laser cutting processing When cutting the outer shape of the product, a positioning pilot hole for automatic product feeding is formed in the base material at the same time as cutting the cut product, and the support joint is bent when the bent product is bent. And a sheet metal working method characterized by being provided at a plurality of locations of a portion with large deformation . The sheet metal processing method according to claim 1 , wherein the sheet metal processing method is used for a tire molding die blade for two-dimensional processing or three-dimensional processing or more.

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