SU1636167A1 - Repair shackle - Google Patents

Abstract

Invention Refers to the repair and restoration of body and sheet metal parts of machines with cracks, splits, breaks. The purpose of the invention is to increase labor productivity by eliminating the operation of bending the ends of the legs from the inside into hard-to-reach places and increasing the reliability of fixing the splinters. The bracket is a jumper 1 with curved legs 2, the Jumper is bent in the middle of the inside of the bracket, and the legs are bent radially out of the bracket. At the ends of the legs there are spikes 3, the slope of which is directed towards the center line of the bracket. Under the action of force P on the shoulders of the lintel, a staple is inserted by elastic legs with a tension into the holes of the part until the studs with the edges of the hole are secured from the inside of the part. The staple allows for a rigid fixation of spalls, reliable tightening of the edges of the separation line, and an increase in labor productivity. 3 sludge. ё о 00 Os 4

Description

1

The invention relates to the repair and restoration of carcass and sheet metal parts of machines with cracks, splits, breaks.

The aim of the invention is to increase labor productivity by eliminating the operation of bending the ends of the legs from the inside into hard-to-reach places and increasing the reliability of fixing the splinters.

FIG. 1 shows the bracket in free condition before repair; in FIG. 2, a bracket inserted into the hole of the part; in fig. 3 is a scheme for fixing a spall using a device in the form of several clips-latches.

The bracket for the removal of parts consists of a jumper 1, made with a deflection angle n in the middle, of legs 2 with a bend radius R, spikes 3 at the ends of the legs 2. reliable fixation of spikes 3 with the edges of the hole on the side of the internal cavity of the part.

Example. Consider the repair of body parts with a chip thickness of 35 mm.

For the manufacture of the proposed bracket, a wire of 05 mm round section is chosen to obtain a more flexible bracket than a bracket of rectangular section, as well as ease of insertion of the formed legs 2 from this wire into the holes 4 of part 5. Before drilling the holes along the spall line, we determine the diameter of the holes. rep. which is determined by the formula

It is dressed ot - L + I + Kshchip.

where A - (0.02-0.05) H.

As laboratory tests show, the lower limit is chosen for the thickness of the parts. Includes 30 mm. top - Enters 30 mm,

therefore I 0.05 N, where H (1.3-1.5) enters,

those. H 50 mm, whence JA1 2.5 mm, selects a KShip of 2 mm, and an OD of 9.5 mm, taking into account that b Oprovok is 5 mm. Common

arrow deflection legs I 2 I1 5 mm, radi

2500

the bend of the legs R -tut - TTTs 41 mm Jumper 1 is bent in the middle under

- 9 ° ° angle of deflection a, from where, o. arctg {and

where h N - Enter - b 10 mm, find Е (0,8-0,9) VDet 30 mm. The ends of the legs are deformed to form the necessary configuration of spikes.

The staples are then subjected to a quenching operation to impart elastic properties. The use of 12 brackets with the above ratios makes it possible to reliably fix and squeeze the breakaway part to the separation line with difficult access from the inside. The subsequent welding with the wire of the PANCH-11 allows to complete the repair process and install the body part in the engine, which is operated in real conditions without failures.

As laboratory tests have shown

H2 of the prototype, the choice of radius R - g - t.

H2

for example, does not allow for

get satisfactory conditions

fixing breakaway parts with

large weight and torn line spalling. With

H

H

R-for example, R 32 mm, the insertion of the legs is extremely difficult, it is necessary to increase the diameter of the holes and make deeper chamfers in the upper part of the holes, which weakens the cross-section of the part, impairs the performance indicators.

As shown by the test sample, the device acts as a secure latch that allows, in addition to rigid fixation of spalls, reliable tightening of the edges of the separation line and even closing it, which increases productivity by eliminating the operation of bending the ends of the legs in the inner cavity of the part. the account of the elastic properties of the bracket, which allows to completely reproduce the line and the area of separation when applied, did not take up to 10% of the total time.

Claims (1)

Invention Formula Parts repair bracket, consisting of a lintel and curved legs, characterized in that, in order to increase labor productivity by eliminating the operations of bending the ends of the legs from the inside in hard-to-reach places and increasing the reliability of fixing the splinters, the jumper is made with a deflection in the middle inside the bracket, and the legs are bent radially outwards brackets and made with spikes at the ends, the slope of which is directed to the center line of the bracket. FIG. I fig.Z