CN202290977U

CN202290977U - Punching head of portable manual punching machine

Info

Publication number: CN202290977U
Application number: CN2011203243897U
Authority: CN
Inventors: 李刚; 甘文辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-31
Filing date: 2011-08-31
Publication date: 2012-07-04
Anticipated expiration: 2021-08-31

Abstract

The utility model discloses a punching head of a portable manual punching machine, which comprises a cylindrical punching shear head with the diameter of d. The end face of the punching shear head is concave, a circle of formed edge is an annular edge with certain thickness of k, the annular edge is provided with two sections of symmetric planar edges and two sections of symmetric arc-shaped edges, the arc-shaped edges are adjacent to the planar edges, the arc radius R of the edge surfaces of the arc-shaped edges is equal to d2/32 +1. During punching shear, the two sections of symmetric planar edges are contacted with a round hole to be punched at first, the rest of the round hole to be punched is gradually punched/sheared by the two sections of symmetric arc-shaped edges along with the downward movement of the punching head, the overall edges can be prevented from simultaneously bearing forces during the whole process of the punching shear, the labor can be saved during punching, and the punching head cannot be damaged easily. Moreover, the requirements for the strength of other components of the punching machine are low, and the punching head can be used safely and reliably and is particularly for use on the portable manual punching machine.

Description

Portable manual perforating press drift

Technical field

The utility model relates to a kind of drift, particularly a kind of drift that is applicable to the portable manual perforating press.

Background technology

Portable perforating press is mainly used in the wire clamp, band steel perforate of the row's punching of copper bar, aluminium and the electric equipment of circuit distribution cross-arm, the material punching of iron tower of power transmission line tower and the converting equipment of departments such as electric power, telecommunications, railway etc., is that the high-altitude field operation uses in the open air mostly.Drift and the punch die of being furnished with one group of different size on this perforating press, drift are consumable accessorys wherein.One of major reason that causes the drift rapid wear is, the punching cutting edge of existing drift is ring plain (like Fig. 3 and shown in Figure 4), and cutting edge is simultaneously stressed comprehensively during punching, and resistance is very big, under stressed excessive situation, and the easy off-axis of drift and impaired.And this drift is required great effort when the beginning punching very much, makes troubles to work high above the ground.

Summary of the invention

The purpose of the utility model is to overcome the existing in prior technology defective, propose a kind of punching resistance evenly, portable manual perforating press drift fragile, not easy to use.

The technical scheme that realizes above-mentioned purpose is: a kind of portable manual perforating press drift; Comprise that diameter is the cylindrical punching head of d; Punching end surface indent, a formed circle bead is the annular cutting edge with certain thickness k, has the plane cutting edge of two sections symmetries and the circle of two sections symmetries to lack the shape cutting edge on the said annular cutting edge; It is adjacent with the plane cutting edge that circle lacks the shape cutting edge, and circle lacks the sword face arc radius R=d of shape cutting edge ²/ 32+1.

Described every section plane cutting edge and every section circle lack the shape cutting edge and all account for 1/4 of annular cutting edge.

A said punching diameter d is 9～21mm, the thickness k=0.6～1.2mm of annular cutting edge.

In the punching process, the plane cutting edge of two sections symmetries contact is earlier begun the circular hole punching by the plane of punching object, along with drift is descending; The circle of two sections symmetries lacks the shape cutting edge and contacts gradually by the circular hole remainder of punching, has avoided cutting edge simultaneously stressed comprehensively in the whole punching process, and the punching resistance is even; Punching is laborsaving; Drift is not fragile, and low, safe and reliable to the requirement of strength of the miscellaneous part of perforating press.This drift is particularly suitable for the portable manual perforating press and uses.

Description of drawings

Fig. 1 is the profile of an embodiment of the utility model.

Fig. 2 is that the A of Fig. 1 is to view.

Fig. 3 is a kind of profile of existing drift.

Fig. 4 is that the B of Fig. 3 is to view.

Among the figure: 1. threaded connection hole, 2. guide cylinder body, 3. punching head, 4. plane cutting edge, 5. circle lacks the shape cutting edge.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described further.

As depicted in figs. 1 and 2; The utility model portable manual perforating press drift is a single piece; The punching that guide cylinder body 2, threaded connection hole 1 that guide cylinder body 2 centre of gyration tops are connected with the perforating press associated components is arranged on the drift and be positioned at the end 3; The diameter d of punching 3 is any among 9mm, 11mm, 13mm, 15mm, 17mm, 19mm or the 21mm, and punching 3 end face are indent garden cylinder, and this indent garden cylinder degree of depth is generally 2.5mm; A formed circle bead is the annular cutting edge of thickness k=0.6～1.2mm, and the thickness k of annular cutting edge increases with the diameter d of punching 3.On the annular cutting edge, have the plane cutting edge 4 of two sections symmetries and the circle of two sections symmetries to lack shape cutting edge 5, it is adjacent with plane cutting edge 4 that circle lacks shape cutting edge 5, and circle lacks the sword face arc radius R=d of shape cutting edge 5 ²/ 32+1, every section plane cutting edge 4 lacks shape cutting edge 5 with every section circle and all accounts for 1/4 of annular cutting edge, and promptly every section plane cutting edge 4 equates with the peripheral arc length that every section circle lacks the front projection of shape cutting edge 5 end faces, respectively accounts for 1/4 of the peripheral arc length of annular cutting edge, and is as shown in Figure 2.

When processing the cutting edge of the utility model drift, processing annular as shown in Figure 3 plane cutting edge is pressed radius R=d again on the cutting edge of annular plane earlier ²/ 32+1, the degree of depth are 2.0～2.5mm, and the circle that processes symmetry lacks shape cutting edge 5.

Claims

1. portable manual perforating press drift; Comprise that diameter is the cylindrical punching head of d; Punching end surface indent, a formed circle bead is the annular cutting edge with certain thickness k, it is characterized in that: on said annular cutting edge, have the plane cutting edge of two sections symmetries and the circle of two sections symmetries to lack the shape cutting edge; It is adjacent with the plane cutting edge that circle lacks the shape cutting edge, and circle lacks the sword face arc radius R=d2/32+1 of shape cutting edge.

2. according to the described drift of claim 1, it is characterized in that: described every section plane cutting edge and every section circle lack the shape cutting edge and all account for 1/4 of annular cutting edge.

3. according to claim 1 or 2 described drifts, it is characterized in that: a said punching diameter d is 9-21mm, the thickness k=0.6-1.2mm of annular cutting edge.