SU1620209A1 - Casting line - Google Patents

Abstract

The invention relates to foundry, in particular to casting lines for the manufacture of castings under single and small batch production conditions. The goal is to increase the stability of the line and reduce its size. Forms from the mold assembly site are mounted on a trolley equipped with a form weighing device. The form distribution analyzer distributes them according to a specific program so that on each branch of the conveyor there are so many forms that their total metal consumption is equal to the metal intensity of the pouring bucket. The invention of eco-, mit production space and liquid metal. 2 hp f-ly, 1 ill.

Description

The invention relates to foundry, in particular to casting lines for the manufacture of castings under single and small batch production conditions.

The aim of the invention is to increase the stability in the operation of the line and reduce its size.

The drawing schematically shows the casting area of the casting line.

The site consists of three branches 1 of the mold casting with filling platforms 2 and two transborder carriages 3 and 4. The conveyor of the mold assembly section 5 and the mold cooling section 6 adjoin the mold casting section. The device for weighing the finished molds can be located either at the last position of the mold assembly section 5, or on the transferring vehicle — the transferor cart 3.

As a weighing device, any weighing device can be used, in which the weighing result is converted into an electrical signal, for example, weighing devices equipped with tensors. A signal corresponding in size to the weight of the form is transmitted to an analyzer (not shown), for which a microprocessor or mini-computer can be used.

Lini works as follows.

The molds produced at the molding section after they are finished and the cores are inserted are assembled at the assembly section (not shown) and transferred to the mold casting section. At the last position of section 5 of the assembly or on the transborder carriage 3, the forms are weighed, and the results of the weighing of the forms are transmitted to the analyzer, in which the summation

determined by weighing the masses of the forms M and comparing them with the sum of the methods. MAY COP

possible masses of the forms M y and with the metal intensity of the casting ladle Mfc according to the equation

4 M "with 4-h f

.Max

The maximum mass of the M form is equal to the mass of the flasks and the mass of the mixture in the mold without a cavity for casting. When making a mold with a cavity for casting, the mass of the mold is reduced by the amount absent in the form of a mixture, i.e. on

m cw voTft, where “see the density of the mixture in the form; VOT is the volume of the casting and the gating system, while the mass of the mixture withdrawn from the mold becomes equal to M, and the mass of the mixture

u max withdrawn from n forms is equal to n m

fi

- 5 M. Mass of metal that i t

can

fill cavities in all forms, bu $ c

det is equal to -A (-Mj and OSAL T, t

must be equal or several

less than the mass of the metal t in kov- / A

higher (density of metal).

Therefore, the analyzer is

comparison of the total weight of n forms 2Kh

 ™

max with predetermined values

and with a predetermined mass of metal, in a ladle t, taken with a coefficient

o e / c / o m - As soon as for any mln and ..

weighed form size p M m -

1 L - becomes more important

h

I,

P

A 1

h "/ ohm t, the analyzer gives the command m V k50

do the switching of vehicles, the installation of this form and the forms following it to another casting branch and begins to produce a new summation of the masses of the forms, including the mass of the given, form, and also gives a signal that the forms are ready for the branches to be filled.

Due to this switch, each branch of the conveyor sets 0

s

0

five

thirty

7e

40

45

50

,

with exactly as many shapes as can be poured from one bucket. In this case, if not all the molds installed on the branches have the minimum metal consumption, some of the positions on the branches remain free, and the molds ready for pouring are directed to another casting branch, on which they stand idle until the beginning of the mold casting on this branch. In this case, the filling of the second filling branch with forms begins and ends in less time than in the case of filling out each of the filling branches with forms completely.

The analyzer's program of work may also provide for a comparison of the mass of the forms arriving at the second branch after filling the first branch with the difference between the metal intensity of the bucket and the metal intensity established on the first branch of the forms. In case the metal content of the form to be weighed is less than this difference, the form may additionally be directed to the first branch.

As a result, stable conditions for metal casting appear, when for each bucket with metal supplied to the casting area, the metal intensity of the molds is required for the most complete casting of the metal, as well as conditions for increasing the line capacity and saving the liquid metal, since this reduces the discharge of the metal remaining in the ladle.

The application of the proposed line will increase the stability of work and the productivity of the manufacture of castings in single and small-scale production and will save liquid metal.

Claims (3)

1. The casting line, mainly for the manufacture of castings in single and small-scale production, containing located in the technological sequence of the areas for forming, finishing molds, inserting the assembly rods, the device for distributing molds to the pouring section, located perpendicular to the mold assembly section and connecting parallel branches of the casting section , as well as the areas of knocking out of the molds and the return of flasks, connected with transport driven roller conveyors, characterized in that, in order to increase the stability in the operation of the line and with increments its dimensions, it is provided with a weighing device assembled shapes, arranged between the assembly and filling portions of shapes and distribution analyzer formulations for pour branch portion. 2. Line according to claim 1, characterized in that the weighing device of the assembled molds is located at the last position of the mold assembly portion. 3. Lines according to claim 1, characterized in that the weighing device of the assembled forms is mounted on the form distribution device. E T four 7 I