Positioning process for double bending of embedded switch cabinet panel
A switchgear, built-in technology, applied in the field of double-bending positioning process of the built-in switchgear panel, can solve the problems that affect the appearance and quality of the product, fail to meet the requirements of the drawing, and the processing technology is complicated, etc., to achieve convenient processing , reduce the scrap rate, improve the effect of economic benefits
Active Publication Date: 2005-03-02
STATE GRID CORP OF CHINA +2
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Problems solved by technology
Most of the parts are sheet metal parts and most of them have complicated processing technology, especially whether the double bending is correct or not directly affects the appearance and quality of the product
In the past, the sheet was double-bent after shearing, punching, drilling and other processes. Since the verticality of the cut sheet itself is not particularly good, if one side is used as the benchmark when bending, plus the Accumulated errors can easily cause the original hole to deviate from a certain distance after bending, which cannot meet the requirements of the drawing
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[0009] According to the accompanying drawing 1, after the plate is cut, two semi-rectangular notches 1 with the same shape and symmetrical distribution are punched on both sides of the double-bent edge with the center of the edge as the axis of symmetry, and the notch is punched with a CNC punching machine. Then all the holes 2 on the plate all take this notch as the datum of punching, and also take this notch 1 as the datum of bending when the edge is bent. This eliminates the misalignment of the holes at the double bend due to the verticality error of the sheet itself.
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The production process of double bent embedded switch cabinet panel includes the shearing, punching, drilling and double bending of plate material. The present invention features shearing the double bent edges about the edge center as symmetrical axis, punching two semi-rectangular notches in the same shape symmetrically, and punching hole and bending edges with the semi-rectangular notches as positioning datum line. The present invention has unified hole-punching and bending datum line and thus has less error, convenient machining and raised product quality.
Description
1. Technical field: [0001] The invention relates to a switch cabinet panel processing technology, in particular discloses a double-bending positioning process for an embedded switch cabinet panel, which is applied in the panel production process of the switch cabinet. 2. Background technology: [0002] A KYN28A type embedded and removable metal-enclosed switchgear is the main product of the switch industry. Most of the parts are sheet metal parts and most of them have complicated processing technology, especially whether the double bending is correct or not directly affects the appearance and quality of the product. In the past, the sheet was double-bent after shearing, punching, drilling and other processes. Since the verticality of the cut sheet itself is not particularly good, if one side is used as the benchmark when bending, plus the Accumulated errors can easily cause the original hole to deviate from a certain distance after bending, which cannot meet the requirement...
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IPC IPC(8): B21D5/00B21D11/22
Inventor 张承波周萍
Owner STATE GRID CORP OF CHINA