SU1209419A1 - Method of adjusting plastic shock absorbers - Google Patents

Description

1 The invention relates to a machine ™ structure, to methods of adjusting plastic shock absorbers consisting of pipes, along which the mandrels are moved along the same direction as the tension,

The purpose of the invention is to reduce the laboriousness of the adjustment by reducing the number of grooves in the mandrel.

The bottom of the adjustable shock absorber, the specific deformation energy P in the preliminary section, is defined as the ratio of the deformation energy E to the deformed volume

E.

R .

Go

Dp of the cylindrical tube, the average specific strain energy in the preliminary section of length 1 becomes equal to

Ro-cf

e

RS

SP

i () t - n ()

where PCP is the average strain force; DO is the diameter of the mandrel; df is the internal diameter of the pipe.

Since the average specific deformation energy for a set of values of the geometric characteristics and material of a material of a custom plastic element is constant over the entire length of the pipe, and hence its value in the preliminary section is equal to the value on any section of the pipe, t.

.R „p,., .. RI const.

It follows that the strain force is proportional to the area of the pr deformed section

PH-PO-S ,.

Dp of a given nominal value of the deformation effort and a tortuous specific energy value of the deformation p determine the cross-sectional area from which the required diameter of the mandrel is calculated. the complexity of the settings plastic plasticizer,

Figure 1 shows a plastic shock absorber, longitudinal slit

O

five

0

five

0

five

0

50

five

1.92

pepper section of the pipe in the deformed section without mandrel; Fig. 2 shows the calculated relationship between the deformation force and the area of the deformed section.

The plastic shock absorber consists of a pipe and a road 2 with a variable diameter placed in it. The pipe 1 has a technological section 3 for the selection of deformation forces P, a working section 4 and a preliminary section 5.

The straight line 1 shown in FIG. 2 has an inclination angle corresponding to the average specific strain energy Po. For a given nominal value of the deformation stress PH and direct I, the required cross-sectional area & , which calculate the required value of the diameter of the mandrel D,

The method is carried out as follows.

The incoming pipe to the assembly measures the internal diameter d -, -. Using a hydraulic press in the pipe, Dorn is pulled for a predetermined length (E for I, 5 lengths for the mandrel). When moving the mandrel, the average strain force is measured using elastic dynamometers and a statistical average indicator (CMC). According to the nomogram, the SIS readings are translated into medium strain forces P ° p. Then the mandrel is removed from the pipe and the diameter Do is measured at the projections of an inflated section So of section 5 (FIG. 1). plot p calculate the value of the extra diameter of the mandrel by the formula

1 CR

On the round-grinding machine, the allowance at the mandrel is removed to the value of DI. Next, the Sch7. Static shock absorber is collected and the setting is controlled on the hydraulic press.

The use of the proposed method provides adjustment of the plastic shock absorber in one attempt, thereby reducing the laboriousness of the adjustment work, reducing the energy costs of moving the mandrel, and also saving pipe material by reducing the length of the process section.

/

Editor A. Shandor

Compiled by V.Kuznetsov Tehred A. Boyko

Order 368/19 Circulation 739 Subscription

VNIIL of the USSR State Committee

for inventions and discoveries 113033, Moscow, Zh-35, Raushsk nab., 4/5

and

Branch ShSh Patent, Uzhgorod, Proektna St., 4

FIG. g

Proofreader E. Sirohman

Claims (1)

METHOD FOR ADJUSTING PLASTIC SHOCK ABSORBERS, according to which the deformation is carried out when the mandrel is moved in an interference fit, the deformation forces are measured, the outer diameters of the mandrels are measured by dimensional processing, characterized in that, in order to reduce the complexity of the adjustment by reducing the number of broaches, as a criterion the settings select the average specific strain energy, and after measuring the deformation force and removing the mandrel from the pipe, the parameters of the deformed section t are additionally measured the ruby. SU, "1209419 1 120941-9