SU759887A1 - Impact-testing machine - Google Patents

Description

The invention relates to the field of testing equipment, and the name of the copra mainly for impact testing of products and samples of materials, '·

Known Koper for testing on the shock, consisting of a rotor, made in the form of a hollow cylinder, on which there is a firing pin, a pipe, for outputting the striker mounted on the side wall of the rotor, and the braking device [1].

During acceleration of the rotor, under the action of centrifugal loads, the barrow is pressed against the side walls of the rotor and, when suddenly braked, enters the pipe where it collides with the test object.

ί The disadvantage of the well-known copra is the low reliability caused by shock braking at high

speeds.

Closest to the invention

the technical essence and the achieved effect is a pile driver, containing a hammer, a rotor, made with a central axial opening for loading the hammer into it and channels for striker exit to the periphery of the rotor,

rotor-covering cylinder having

2

A guide leading to the "striking end" formed by an annular and helical grooves on its inner surface [275 The rotor is set in motion and accelerates to a given speed, then the pipe is fed to the central opening of the rotor by a centrifugal force

10; forces, goes into the annular groove in any place along its length [circumference and, having done a part, a turn at the bottom, ”goes to the helical groove, and then collides with the test specimen through the window in the cylinder,.

However, the design of the Known CoPra does not prevent the striker from returning after a collision with the test sample to the periphery of the test sample quickly.

20 of the rotating rotor, which leads to local deformations of the rotor and unwanted secondary "shots ¹¹ .

In addition, the movement speed of the striker is greater than the circumferential speed of the rotor, therefore the striker strikes the rotor protrusions, because the ring groove does not remove the striker from the plane of rotation of the rotor during one revolution, which does not provide sufficient reliability.

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759887

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The purpose of the Invention is to improve the reliability of the copra.

This goal is achieved by the fact that the annular groove on the inner surface of the cylinder is a continuation of the helical groove, and a second window is made in the cylinder for "the striker output located at the transition point of the helical groove to the annular one".

Moreover, the cylinder is made along the length, and the inner surface of its part, covering the rotor, is a truncated cone, the larger base of which is turned to the helical groove.

Figure 1 shows the headframe, a longitudinal section; in fig. 2 - section A-A on fig. one.

The pile driver contains the striker 1, the rotor 2 with a central hole 3 and curved slots 4 and 5, a cylinder encompassing the rotor, having on its inner surface a window 6 that leads to the striker’s output, formed by an annular 7 and a helical 8 grooves. The second window 9 for outputting the bde is located at the junction of the helical groove in the annular groove. The cylinder is made detachable of the rings 10 - 12.

The inner surface of the ring 10 is made in the shape of a truncated cone, the larger base of which is directed toward the helical groove.

Koper works as follows.

The rotor 2 accelerates to the required rotational speed, then, at the operator’s command, the electromagnetic cutter 13 is triggered, and the firing pin 1 from the feeder 14 enters the central hole 3 of the rotor 2 through the pipe, after which under the action of centrifugal force it accelerates in curved slots 4 and 5 and goes out without impact on the conical surface of the ring 10.

Further, the striker 1 is moved to the helical groove 8, is captured it srezennymi early windings minutes, moving on it by the window 9, goes into the annular groove 7, causing central impact on the end face of the waveguide 15, causing therein a shock wave compression feedback ⁴ conductive for product 16. After the collision with the waveguide, the firing pin moves back and directed by the annular groove 7 flies out of the window 9, after which it can be used again.

Thus, the possibility of returning the striker to the fast-rotating rotor and strikes of the striker against the rotor is eliminated in the copra, which significantly increases the reliability of work.

The implementation of the cylinder, covering the rotor 'composite simplifies the technology of its manufacture.

In addition, the described design allows the striker to collide with the sample directly in the cylinder under the protection of its walls, which eliminates the need to install additional cumbersome operator protection.

Claims (2)

Claim 1. Pile driver, mainly for impact tests, containing, face, rotor, made with central axial hole for loading the head into it, and channels to exit the head to the periphery of the rotor, covering the rotor cylinder, having a guide formed by the ring and helical grooves on its inner surface, from l and h and y and n and th with i the fact that, in order to increase the reliability of However, the annular groove on the inner surface of the cylinder is a continuation of the helical groove, and a second window is made in the cylinder for outputting the striker, located at the transition point of the helical groove to the annular groove. 2. Koper on π. 1, that the cylinder is made composite in length, and the inner surface of its part, embracing the rotor, is a truncated cone, the larger base of which is turned to the helical groove.