SU1202762A1 - Piercing tool - Google Patents

Description

1202762

2. The fastener according to claim 1, characterized by cutting edges, representing the fact that at the end of the cutting protrusions of the cylindrical body, there are additional elements.

one

The invention relates to metalworking and can be used in the processing of casting bays parts.

The purpose of the invention is the expansion of technological capabilities by ensuring the removal of technological ribs and caps in the holes

Figure 1 shows the firmware, a general view; figure 2 - section aa in figure 1; fig.Z - firmware in the process; on - section bb in figure 3 | on fig.Z - view In figure 1

The firmware consists of the working part 1 and the front guide 2, carrying the cutting element 3, made in the form of a polyhedron. Thus, that two planes 4 are parallel to each other and parallel to the axis of the firmware, plane 5 is perpendicular to the planes 4, and two planes 6 are located between planes 4 and 5 at an angle d to the axis of the firmware. At the same time between the two / m planes 4c of the opposite side there is a cylindrical surface 7, which is made according to the shape of the hole to be machined 8., has a foundry lintel 9 and a solid 10 film formed by gulfs into the locking part of the mold rods

The end face of the cutting element 3 is made in the form of two wedges 11, formed by the edges 12 of the trapezoidal groove.

The tool works as follows.

The firmware is supplied to the cylindrical holes 8 of the machined part, while the end of the cutting element 3 enters the space between the web 9 and the surface of the hole 8, the wedge 1 penetrates

5, the capstan 10 inlet 3 at the same time the cutting element 3 self-aligns j with the surface 7 on the cylindrical surface of the hole 8. And with the planes 6 on the vertical intersection 9. With further forward movement of the firmware, the connecting element 3 undermines, cleaves and separates the first 9, at the same time captivity 10.

2- Thus, a preparation is made, holes for further processing by the working part I of the broach, which finally along the contour cleans the hole.

FIG.

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Compiled by I.Lihopoy Editor O.Pushnenkova Tehred Z.Kastelevich Proofreader V.Sinitska

Order 8357/14 Circulation 1085 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. D. 4/5

Branch ran Patent, Uzhgorod, st. Project, 4

Claims (2)

I. FIRMWARE, including the working part and the front guide, with the aim of expanding technological capabilities, the cutting element is made in the form of a polyhedron, two faces of which are parallel to each other and parallel to the axis of the firmware, the third face is perpendicular to the first two, the fourth face mating with the first two is made of cylindrical shape , and the fifth and sixth faces 2 “Firmware in accordance with π.1, which entails that additional cutting edges are made on the end face of the cutting element, which are protrusions of a cylindrical shape.