SK1432020A3 - Jig for measuring mechanical properties of welded joint in tearing machine - Google Patents

Abstract

The device for measuring the mechanical properties of a weld joint in a tear-off machine includes a cutter (11), a cutter (5) and a replaceable cutter (6), where the cutter (11) includes a mutually releasably connected base (7), a cover (8) and means for attaching the cutter (11) to the drawbar (1) of the shredder, the base (7) having a groove (13) for the shear (5), the lid (8) having a hole (15) for the shear (6) and with a hole (15) for the shear ( 6) corresponds to the fixing element (3) of the cutter (6), the cutter (5) is slidably stored in the cutter (11), while it contains the cutting edge (21) formed in the groove (20) for inserting the sample (12) and means for connecting the cutter (5) to the pull rod (1) of the shredder, and the replaceable shear (6) includes a recess (23) for the sample (12) and a cutting edge (22) that corresponds to the cutting edge (21) of the cutter (5).

Description

The field of technology

This invention relates to the field of measuring the mechanical properties of a welded joint.

Current state of the art

A weld joint consists of three basic parts - the base material, the heat-affected area and the weld metal. The technological conditions of the welding process affect its properties, therefore it is necessary to determine them. Currently, a tensile test of the welded joint is performed, while usually, in the case of its high-quality execution, there is a violation in the area of the basic material - a technological test is performed. However, this does not say anything about the influence of the technological conditions of the welding process on the properties of the individual parts of the joint, for which a test of its mechanical properties is necessary.

The goal of this invention is to design a device that can measure the shear strength of a welded joint in any place - in the base material, the heat-affected area, and in the weld metal in the case of a butt joint.

The essence of the invention

The stated goal is achieved by the device for measuring the mechanical properties of the weld joint in the blasting machine according to. The essence of the preparation according to the present invention is that it includes a clipper, a clipper and a replaceable clipper, where the clipper includes a mutually detachable connected base, a lid and means for connecting the clipper to the pull rod of the shredding machine, the base includes a groove for the clipper, the lid includes an opening for the clipper and the fixing element of the shear corresponds to the hole for the shear. The cutter is slidably stored in the cutter, while it contains a cutting edge formed in a groove for inserting the test sample and means for connecting the cutter to the pulling rod of the shredding machine. The replaceable cutter contains a recess for the test sample and a cutting edge that corresponds to the cutting edge of the cutter.

To ensure the loading of the tested sample in one axis, the means for connecting the cutter to the pulling rod of the tearing machine are formed by a cross joint at one end of which is connected to the fixing pin, which is passed through the hole in the base and lid of the cutter and at the other end of it is connected to the pulling rod of the tearing machine machine, and the means for connecting the cutter to one drawbar of the shredding machine is formed by a cross joint at one end of which is connected to a fixing pin which is passed through the hole in the cutter and at the other end of it is connected to the other drawbar of the shredder.

Overview of images on drawings

The invention is also explained in the attached drawings, which show:

fig. 1 side view in section of the fixture fixed with cross joints to the drawbars;

fig. 2 top view of the preparation from fig. 1;

fig. 3 top view of the cutter base;

fig. 4 section of the base of the cutter along plane A-A from fig. 3;

fig. 5 section of the base of the cutter along the plane C-C from fig. 3;

fig. 6 top view of the cutter lid;

fig. 7 side view in section of the lid of the cutter from fig. 6;

fig. 8 top view of the shearer;

fig. 9 side view of the clipper from fig. 8;

fig. 10 top view of the shearing room;

fig. 11 side view in section of the shearing machine from fig. 10;

fig. 12 a detailed side view in section of the shearing part of the preparation with inserted test sample with butt weld joint before shearing;

fig. 13 view from fig. 12 after cutting the tested sample;

fig. 14 detailed side view in section of the shearing part of the preparation with inserted tested sample with lapped weld joint before shearing;

fig. 15 view from fig. 14 after cutting the tested sample.

SK 143-2020 A3

Examples of implementation of the invention

The preparation, according to this invention, according to fig. 1 to 11, for measuring the mechanical properties of the weld joint in the tearing machine, contains three main parts: the cutter (11), which ensures the clamping of the test sample (12) with the weld joint, also the clamping of the shear (6) and the guidance of the shear (5), the shear (5) and shear (6).

The trimmer (11) includes a base (7), which is separately shown in fig. 3 to 5, and the cover (8), which is separately shown in fig. 6 and 7.

The base (7) of the cutter (11) contains a groove (13) for the cutter (5) and a hole (14) for the fastening pin (9).

The lid (8) of the cutter (11) contains a hole (15) for the cutter (6) and a hole (14) for the fastening pin (9). The opening (15) for the cutter (6) in the transverse direction of the groove (13) for the cutter (5) has a larger dimension than the width of this groove (13). The yoke (4) of the fixing element (3) of the shear (6) is placed above the opening (15) for the shear (6). In the example shown, the stirrup (4) is preferably fixed to the lid (8) with screws. The fixing element (3), which in the illustrated example is in the form of a cylinder, corresponds to the hole (15) for the shear (6) and in the illustrated example it is fixed from the yoke (4) by a fixing screw (16).

The base (7) and the lid (8) are removably connected to each other, preferably by screw connections, as shown in the figures. The base (7) serves to guide the cutter (5) in the axial direction, and the lid (8) serves to define the shear clearance, which can be adjusted with washers (not shown in the pictures) of suitable dimensions between the base (7) and the lid (8). At the same time, the lid (8) also serves to place the shear (6).

Clipper (5), shown in fig. 8 and 9, includes a stem (17) and a handle (18) with a hole (19) for a fixing pin (10). The stem (17) of the cutter (5) corresponds to the groove (13) in the base (7) of the cutter (11), and contains a cutting edge (21) created, for example, by a milled groove (20). The groove (20) simultaneously serves to place one part of the tested sample (12) with a weld joint.

The shear (6), shown in fig. 10 and 11, is a replaceable body that corresponds in shape and size to the opening (15) for the cutter (6) in the lid (8) of the cutter (11). A recess (23) for the tested sample (12) and a cutting edge (22) corresponding to the cutting edge (21) of the cutter (5) are created in the cutting machine (6). The shear (6) can have a different thickness, which makes it possible to use tested samples (12) of different dimensions. Choosing the size of the tested sample (12) with a weld joint and its removal enables the placement of the shear plane in the desired location of the tested sample (12). The shear (6) is placed in the opening (15) of the lid (8), where it is fixed in this opening (15) by means of a fixing element (3) fixed by a yoke (4) with a fixing screw (16).

When measuring the mechanical properties of a weld joint using the preparation according to the present invention, as shown in fig. 12 to 15, the test sample (12) with the weld joint is inserted through the opening (15) of the lid (8) and the recess (23) in the inserted cutter (6) so that it reaches the bottom of the groove (20) in the cutter (5). The position of the tested sample (12) with the cutting plane in the required place of the sample (12) is fixed using a fixing element (3) and a yoke (4) also used to fix the shear (6). The size of the tested sample (12) with a welded joint is given by the distance between the bottom of the groove (20) in the cutter (5) and the face of the fixing element (3).

The entire fixture is placed in the blasting machine by means of cross joints (2) and drawbars (1), which is used for deriving and at the same time measuring the drawing force and measuring the displacement. Cross joints (2) ensure loading in one axis.

As shown in fig. 1 and 2, at one end the jig is connected to the joint (2) by means of a pin (9) passed through the hole (14) for the pin (9) in the base (7) and lid (8) of the cutter (11). This pin (9) transmits the force generated by the blasting machine in one direction. At the other end, the fixture is connected to the joint (2) by means of a pin (10) passed through the hole (19) for the pin (10) in the cutter (5). This pin (10) transmits the force generated by the blasting machine in the other direction. The displacement, cut, on the sample (12), which occurs due to the action of opposite forces derived by the tearing machine on one side on the cutter (11) and on the other side on the cutter (3) is shown in fig. 12 to 15 shown by an arrow. At the same time, fig. 12 and 13 together show a diagram of shearing of a butt weld joint in the region of the weld metal, and fig. 14 and 15 together show a diagram of shearing of a lap weld joint.

SK 143-2020 A3

List of reference marks pull rod of shredder cross joint clipper fixing element clamp clipper clipper clipper clipper base clipper cover clipper fixing pin clipper fixing pin clipper test sample clipper base groove clipper fixing pin hole clipper hole in clipper lid clipper fixing bolt clipper shank cutter holder cutter holder hole for cutter fixing pin groove with cutter cutting edge cutter cutting edge cutter cutting edge cutter recess

Claims (2)

PATENT CLAIMS 1. A device for measuring the mechanical properties of a weld joint in a blasting machine, characterized in that it includes a cutter (11), a cutter (5) and a replaceable cutter (6), where the cutter (11) includes a mutually detachable connected base (7), a lid (8) and means for connecting the cutter (11) to the pulling rod (1) of the shredder, the base (7) having a groove (13) for the cutter (5), the lid (8) having an opening (15) for the cutter (6) ) and the fixing element (3) of the cutter (6) corresponds to the hole (15) for the cutter (6), the cutter (5) is slidably placed in the cutter (11) while it contains the cutting edge (21) created in the groove (20) for inserting the tested samples (12) and means for connecting the cutter (5) to the pulling rod (1) of the tearing machine, and the replaceable cutter (6) contains a recess (23) for the test sample (12) and a cutting edge (22) which corresponds to the cutting by the edge (21) of the cutter (5). 2. The preparation according to claim 1, characterized in that the means for connecting the cutter (11) to the pulling rod (1) of the shredding machine are formed by a cross joint (2) at one end connected to a fixing pin (9) which is passed through an opening (14) in the base (7) and lid (8) of the cutter (11) and at its other end connected to one drawbar (1) of the shredder, and means for connecting the cutter 15 (5) to the drawbar (1) of the shredder of the machine are formed by a cross joint (2) at one end of which is connected to the fastening pin (10), which is passed through the hole (19) in the cutter (5) and at the other end of it is connected to the second drawbar (1) of the shredding machine.