Cross-shaped piercing hole flanging structure

Abstract

The utility model provides a cross-shaped piercing hole flanging structure. The cross-shaped piercing hole flanging structure comprises an upper die holder and a lower die holder, an upper clamping plate and a stripper plate are arranged on the upper die base, a cross-shaped punch is arranged on the upper clamping plate, and the stripper plate is connected with the upper die base through a stripper spring. A plurality of floating pins are arranged on the lower die base and correspond to the edges of the two sides of the blank, and the floating pins are connected with the lower die base through floating springs. The cross-shaped punch is matched with the stripper plate, piercing of blanks and flanging of holes are completed in the one-time punching process, the original two procedures are combined into one step, the punching preparation technology is effectively simplified, and manpower and die cost is reduced.

Description

Technical Field

[0001] The utility model relates to a punching structure of a threaded hole, in particular to a cross-puncture punching hole structure. Background Art

[0002] There are many ways to process threaded holes. One of them is to prepare threaded holes by punching and flanging, which is generally suitable for small threaded holes below M5.

[0003] The method of preparing threaded holes is to pre-punch the blank first, then flanging the hole, and finally tapping the hole to form the thread. The disadvantage of this method is that the preparation process is divided into three steps, which has many steps and high cost.

[0004] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0005] The utility model provides a cross-puncture hole-turning structure to solve the above-mentioned problem.

[0006] A technical solution adopted by the utility model is to provide a cross-puncture hole-turning structure, including: an upper die base and a lower die base;

[0007] The upper die seat is provided with an upper clamping plate and a stripping plate, the upper clamping plate is provided with a cross punch, the stripping plate is connected to the upper die seat through a stripping spring, presses the blank during stamping, and helps the cross punch to separate from the blank during die opening;

[0008] The lower die seat is provided with a plurality of floating pins corresponding to the edges of both sides of the blank. The floating pins are connected to the lower die seat through floating springs and are used to support the blank and float the blank after the die is opened.

[0009] Furthermore, the cross punch includes a straight section and a pointed head, the pointed head is a cross cone with four inclined surfaces and four beveled edges, the beveled edges and the vertical line include an angle of 30°, and during punching, the pointed head pierces the blank and the straight section completes the flanging.

[0010] Furthermore, the diameter of the straight section is not less than that of the pointed head.

[0011] Furthermore, the diameter of the straight section is smaller than the diameter of the threaded hole, so that the hole can be cut to form threads later.

[0012] Furthermore, the diameter of the straight section is larger than the diameter of the threaded hole, so that the hole can be extruded to form threads later.

[0013] The beneficial effects of the cross-puncture hole-turning structure of the utility model are:

[0014] 1. The cross punch is used in conjunction with the stripper plate to complete the puncture of the blank and the flanging of the hole in one stamping process, combining the original two steps into one step, effectively simplifying the stamping preparation process and reducing manpower and mold costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a cross-puncture hole-turning structure of the first embodiment of the utility model;

[0016] Figure 2 It is a schematic diagram of a cross punch in the first embodiment of the utility model;

[0017] The markings of the components in the accompanying drawings are as follows: 1. upper die base, 2. upper clamping plate, 3. stripping plate, 4. cross punch, 5. lower die base, 6. lifting pin, 7. blank, 41. straight section, 42. pointed head. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "horizontal", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention. They cannot indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0020] See also Figure 1 and Figure 2 The first embodiment of the utility model provides a cross-puncture hole-turning structure, including: an upper die base 1 and a lower die base 5;

[0021] An upper clamping plate 2 and a stripping plate 3 are provided on the upper die base 1, a cross punch 4 is provided on the upper clamping plate 2, the stripping plate 3 is connected to the upper die base 1 through a stripping spring, and a plurality of floating pins 6 are provided on the lower die base 5, corresponding to the edges of both sides of the blank 7, for placing and supporting the blank 7, and the floating pins 6 are connected to the lower die base 5 through a floating spring;

[0022] The cross punch 4 includes a straight body section 41 and a pointed head 42. The pointed head 42 is designed as a cross cone, having four inclined surfaces and four oblique edges. The angle between the oblique edges and the vertical line is 30°. During punching, the pointed head 42 will first pierce the blank 7, and the straight body section 41 will complete the flanging.

[0023] During stamping, the stripper plate 3 will first contact and press the blank 7, then the pointed tip 42 of the cross punch 4 will pierce the blank 7, and the straight section 41 will flanging the pierced part of the blank 7. During die opening, the cross punch 4 will first rise with the clamping plate 2 and separate from the blank 7, then the stripper plate 3 will release the blank 7 and rise.

[0024] Specifically, the diameter of the straight section 41 is slightly larger than the pointed head 42 so as to fully flange the material at the puncture site.

[0025] Two types of tapping taps can be used when tapping the hole after flanging, one is a squeeze tap and the other is a cutting tap. When using a cutting tap, the diameter of the straight section 41 is set to be smaller than the diameter of the threaded hole, so that the hole can be cut and threaded later; when using a squeeze tap, the diameter of the straight section 41 is set to be larger than the diameter of the threaded hole, so that the hole can be squeezed and threaded later.

[0026] Specifically, taking the M5 thread hole as an example, when a cutting tap is used, the diameter of the straight section 41 is set to the thread hole diameter - 0.1 mm, and when a squeeze tap is used, the diameter of the straight section 41 is set to the thread hole diameter + 0.35 mm.

[0027] The beneficial effects of the cross-puncture hole-turning structure of the utility model are:

[0028] 1. The cross punch is used in conjunction with the stripper plate to complete the puncture of the blank and the flanging of the hole in one stamping process, combining the original two steps into one step, effectively simplifying the stamping preparation process and reducing manpower and mold costs.

[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cross-puncture hole-turning structure, characterized in that: include: Upper die base and lower die base; The upper die base is provided with an upper clamping plate and a stripping plate, the upper clamping plate is provided with a cross punch, and the stripping plate is connected to the upper die base via a stripping spring; The lower die seat is provided with a plurality of floating pins corresponding to the edges of both sides of the blank, and the floating pins are connected to the lower die seat through floating springs; The cross punch comprises a straight body section and a pointed head, wherein the pointed head is a cross cone having four inclined surfaces and four inclined edges.

2. A cross-puncture punching structure according to claim 1, characterized in that: The angle between the hypotenuse and the vertical line is 30°.

3. A cross-puncture punching structure according to claim 2, characterized in that: The diameter of the straight section is not less than that of the pointed head.

4. A cross-puncture punching structure according to claim 3, characterized in that: The diameter of the straight section is smaller than the diameter of the threaded hole.

5. The cross-puncture punching structure according to claim 3, characterized in that: The diameter of the straight section is greater than the diameter of the threaded hole.

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