SU1412877A1 - Holder for single-impact riveting - Google Patents

Abstract

The invention relates to gluing-assembling works, in particular, to hand tools, which are used for riveting with a single-hammer. The purpose of the invention is to improve the quality of riveting by increasing the size of the radial tension in the area of the insetting head. The support contains a core cd start 1, in which a cylindrical axial recess is made to accommodate the anvil 2, which surrounds the cavity 3. The anvil 2 has an axial channel 5 with an emphasis 6, in which a stepped punch 7 with a working surface 8 is placed, spring-loaded with respect to the anvil by a spring 9. The cavity 3 is filled with an incompressible working medium 12. During the upsetting process of the closing head, the rivet 13, the bag 5 and the anvil 2 move in the direction of impact. Moving the latter due to the inertia of the body 1 creates pressure the working medium in the cavities 3 and 5. Under the influence of the pressure punch 7 is moved in the opposite direction 14 and broken down in the working surface performs deformation compensator mortgage or rivet head 13. 4 z.p.f BACKGROUND yl 4. iO fi J / X / L ///// 4 §KN- -4 // V / (O (L 00 00 vl 7 // ph5.1 2

Description

The invention relates to riveting and jointing works, in particular, to a hand tool used for riveting with single-impact hammers.

The purpose of the invention is to improve the quality of riveting due to the fact that when striking a protruding part of the rivet and forming a closing head of the joint, a force is applied to it simultaneously. mortgage the head through the punch, placed in the axial channel of the anvil.

- In FIG. Figure 1 shows the support in the initial state, general view; in fig. 2 shows the formation of a rivet joint; in fig. 3 shows an embodiment of the end surface of the anvil and the working surface of the punch for a spherical embedded head with a compensator; in fig. 4 - the same, under the flat embedded head with a compensator.

The support includes a body 1 in which a cylindrical axial recess is made, where a core anvil 2 is placed with the possibility of axial movement, forming a cavity 3 with the body. The anvil thrust surface is made in the form of a recess 4 corresponding in shape to the rivet head. An anvil 2 has an axial channel 5 with an emphasis 6, in which a stepped punch 7 with a working surface 8 is placed. The punch 7 is spring-loaded with a spring 9 relative to the anvil 2 in the direction of the abutment 6, i.e. in the direction opposite to its working surface. The tightness of cavity 3 is provided by means of sealing elements 10 and 11, and the cavity itself is filled with an incompressible working medium 12, for example mineral oil.

The attribution of the surface area of the anvil located in the recess of the housing 1 to the area of the greater punch stage is determined by the ratio of their movements, based on the condition of preserving the volume of the working medium.

Technologically; For example, the movement of the punch required to deform the compensator or move the insetting head is between 0.4 and 1.2 mm. The results of the high-speed shooting of the single-impact riveting process show that the movement of the -2 kg anvil is 0.2-0.4 mm. Thus, the ratio of the surface area of the anvil to the area of the larger step is determined by the ratio

... D2 ps.,

uT.i; - The working surface of the punch can be made of various shapes, for example, in the form of a cone with hemispherical rounding (Fig. 1 and 2), as well as in the form of a spherical (Fig. 3) or flat (Fig. 4)

surfaces corresponding to the shape of the protruding rivet heads. The use of deforming punches with a cone-shaped working surface with hemispherical rounding is preferable for conventional rivets that do not contain compensators, and other forms (Fig. 3 and 4) are for rivets with compensators in order to ensure that a mortar is obtained after deforming the compensator; heads correspond, form.

Support for single impact riveting works as follows.

Before riveting, support is established by a recess 4 on the base of the rivet 13 (direct riveting method). 065 the single-impact rim press 14 is mounted on the protruding rivet rod and strikes. During the upsetting process of the closing head, the rivet 13, bag 5, anvil and n 2 move in the direction of impact (deformation).

The movement of the anvil 2 due to the inertia of the support body creates pressure of the working medium — in cavity 3 and the axial channel 5. Under the action of pressure on the end face

5 of the larger step of the deforming punch 7, the latter is moved in the counter swaging direction 14 and the working surface deforms the compensator or the fixing head of the rivet 13 (Fig. 2).

0 Due to the fact that g: the surface of the embedded rivet head is covered by a corresponding anvil groove, the material of the co-compensator of the rivet or the material of the mortgage head itself, deformed, under the influence of the punch, creates an increased radial tension of the g. (by the amount of movement of the punch), which is ensured by selecting the ratios of the anvil areas and the end of the greater punch stage, to ensure optimal compounds resource value ha radial tension in the mortgage rivet head and its distribution over the thickness ck; 1eg1yvaemogo pa5 chum.

Claims (5)

1. Support for single-impact riveting, comprising a body made with a cylindrical axial recess, a core anvil with axial passage and an anvil surface that can be axially moved, and a core with a working surface placed in the anvil axial channel.  characterized in that, in order to improve the quality of riveting, the punch is made stepwise and spring-loaded relative to 0 coals in the direction opposite to its working surface, and the cylindrical recess of the body and the end surfaces of the anvil and punch form a closed hermetic cavity filled with incompressible working medium. 2. Support according to claim 1, characterized in that the ratio of the area of the end surface of the anvil to the area of the greater step of the punch is in the range of 1: 1-6: 1. 3. A support according to claim 1, characterized in that the working surface of the punch is made in the form of a cone with a rounded apex. 4. A support according to claim 1, wherein the working surface of the punch is made with a spherical recess. 5.Support under item 1, different from. that the working surface of the punch is perfectly flat. physical (rig 2 fae.