SU1250389A1 - Reinforcing insert - Google Patents

Description

one

. The invention relates to foundry production, namely to processes for producing bimetallic castings.

The purpose of the invention is to reduce the cracking and closure of the tightness of castings.

Figure 1 shows reinforcement insert, incision; figure 2 - node I in figure 1.

The reinforcement insert 1 is made in the form of a ring with an annular groove 2 of trapezoidal section with a layer of copper 3 (shown by a gatry-dash line) on a contact surface with a thickness of 0.01-0.5 mm. The annular groove with the inner and narzan sides of the ring is formed with the formation of shoulders 4 of triangular cross section with the ratio of the width of the base of the shoulder to their height equal to 0.4-0.6. At a ratio of less than 0.4, the shoulders are straightened, thereby violating the tightness of the casting, and at a ratio of greater than 0.6, cracks occur and due to the disintegrating effect of the reinforcing insert as a result of shrinkage

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processes in the casting. At a thickness of the copper layer on the contact surface of more than 0.5 mm, spontaneous occurrences at the site of contact due to the high thermal conductivity of copper, and tol1cin O, O G mm is minimal, technologically necessary.

The proposed reinforcement insert is used as follows.

10 On a casting or any other alloy of copper or aluminum, a layer is applied to the molded part of the insert by electroplating or any other method.

15 copper 0.01-0.05 mm thick. The insert is then placed in the coclice and is filled with melt. At this time, the annular groove is poured with melt, and the copper plating creates conditions for forming a hermetically tight transition layer. Due to the dissolution of copper in the melt, a continuous transition layer is formed, thereby preventing cracking.

25 in the contact zone of the casting material with an insert.

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Compiled by O.Belkov Editor M.Petrova Tehred L.Serdyukova Proofreader A.Zimokosov

Order 4362/11 Circulation 757 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Manufacturing and printing company, Uzhgorod, st. Project, 4

Claims (1)

REINFORCING INSERT mainly for the manufacture of bimetallic castings, made in the hermeticity of the castings, the annular groove on the inner and outer sides of the ring is made with the formation of flanges of triangular section with a ratio of the width of the base of the flanges to their height equal to 0.4-0.6, and the surface of the annular groove, as well as the inner and outer surfaces of the ring are covered with a layer of copper 0.01-0.5 mm thick. lo SL about GO Q0 SO fie, 1