RU2756813C1 - Manual press for the production of indium wire - Google Patents

Abstract

FIELD: tool engineering.SUBSTANCE: invention relates to the processing of metals by pressure and can be used for the manufacture of indium wire, used, for example, when sealing blocks of electronic products. The manual press contains a lever of the second kind in the form of two handles pivotally connected at one end, a working cylinder, a plunger with a die and a crank. The working cylinder is pivotally fixed on the handle and installed with the possibility of sliding along the walls of the crank with the formation of a crank-rocker mechanism with it. The plunger, pivotally fixed on the handle, is rigidly fixed on the swing axis of the crank coaxially with the working cylinder.EFFECT: design of the press is simplified, the loading of the initial workpiece is facilitated and the pressing force is reduced.1 cl, 2 dwg

Description

The invention relates to the processing of metals by pressure, namely for the manufacture of wire from indium.

When sealing blocks, for example, electronic equipment, indium wire is often used as a sealing gasket. In this case, the wire must be made immediately before use, since long-term storage of the wire promotes the adsorption of substances in the atmosphere on its surface, which significantly impairs the quality of sealing. Therefore, there is a need for devices that allow the production of indium wire immediately before the sealing operation.

A typical design for handheld devices for this application, commonly referred to as hand held indium wire presses, employs a compression molding scheme in which the die is located at the bottom of the cylinder. During direct pressing (extrusion) of metal (indium) through a die, large friction forces of the metal against the cylinder walls arise at the bottom of the cylinder, which leads to the need to use a screw pair to move the plunger in the cylinder with a high transmission ratio. An example of a typical design of a hand press for the manufacture of indium wire is the sample presented in the book by B.S. Danilina "Vacuum deposition of thin films" Energiya Moscow 1967, p. 174.

Such typical devices have a number of disadvantages: they are difficult to manufacture, require great efforts to implement the drive, it is difficult for them to load the original metal blank into the cylinder, the need to lubricate the screw pair violates cleanliness during the extrusion process.

The aim of the invention is to simplify the design of the press to ensure lightweight manufacturing and convenient loading of the initial workpiece, as well as the necessary cleanliness of the process and a significant reduction in efforts to implement the drive.

This goal is achieved by the fact that it is proposed to use a back-pressing scheme in combination with a lever mechanism of the second type and a rocker mechanism. When the metal is back pressed through the die in the plunger head, there are no friction forces against the cylinder walls, and it becomes possible to use a drive mechanism with a small transmission ratio (lever mechanism). The solution to the problem of ensuring the alignment of the cylinder and plunger during their joint movement can be achieved by using a rocker mechanism, in which the cylinder acts as a "rocker rock", and the plunger is rigidly fixed to the link of the rocker.

Figure 1 shows a hand press in two sections.

Figure 2 shows a rocker mechanism with a cylinder and a plunger.

A manual press for the manufacture of indium wire contains a working cylinder 1, a plunger 2 with a die 3, a link 4, a swing axis 5, a travel stop 6, a drive handle 7, a handle bar 8, a cylinder axis 9.

The device works as follows.

With the handles 7 fully diluted to the stop, a workpiece from indium is loaded into the travel stop 6 into the opened hole of cylinder 1. Further, the upper handle, which has an axis of rotation on the linkage bar of the handles 8, is set in motion. The cylinder 1 slides along the walls of the link 4 towards the plunger 2, while simultaneously turning on the axis of the cylinder 9, which is fixed on the swing axis of the link 5 coaxially with the axes of the link and the cylinder. After the plunger enters the cylinder, the indium blank is squeezed out through the plunger die 3.

Since the mechanisms of this hand press do not require any lubrication, the process is completely clean and there is no contamination of the produced indium wire with a lubricant. Due to the use of the reverse pressing method, pressing forces are significantly reduced, which allows the use of a lever mechanism for the drive with the necessary force on the handle provided by one human hand.

The design of the press is high-tech. The use of a rocker mechanism with a cylinder as a "rocker stone" and a plunger fixed on the swing axis of the rocker, being an original solution, ensures the alignment of the cylinder and the plunger.

Claims (1)

A manual press for the manufacture of indium wire, containing a lever of the second kind in the form of two handles pivotally connected at one end, a working cylinder and a plunger with a die, characterized in that it is equipped with a rocker mounted on the swing axis, while the working cylinder is hinged on the handle is installed with the ability to slide along the walls of the link with the formation of a link mechanism with it, and the plunger, hinged on the handle, is rigidly fixed on the swing axis of the link coaxially with the working cylinder.

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