RU2090664C1 - Suspension for polishing on mechanized lines - Google Patents

Abstract

FIELD: treatment of metal surface, in particular, electrochemical polishing on mechanized lines with transfer arms. SUBSTANCE: suspension has a twin casing, frame with a hinge connected through turning bars providing for parallel movement of the frame relative to the casing, current conductor, turnable workpiece holders that are attached to the turning bars connecting the casing and frame. EFFECT: enhanced efficiency. 2 dwg

Description

 The invention relates to the treatment of a metal surface, namely, electrochemical polishing on mechanized lines with auto operators, and can be used for coating in galvanic production using mechanized or automated lines with auto operators.

 Known two-crank mechanisms (parallelograms), the bar of which moves parallel to the line connecting the centers of the axes of the bases [1] The mechanism exhibits the property of parallel movement of the lines connecting the centers of the axes, which is used to achieve the purpose of the invention.

 Known pendants for electropolishing parts [2] which process parts in baths with electrolyte.

 Their disadvantages are, firstly, the fixed location of the fixtures of the parts relative to the suspension housing, and secondly, the need to tilt them over to pour the solution from the concave surfaces when lifting the parts from the bath. These disadvantages make it difficult or impossible to use mechanized lines for parts having concave surfaces. The auto operator lifts the suspension vertically upward and the parts scoop out the solution from the bathtubs with their concave surfaces, polluting them with bathtubs following the technological cycle.

 Known pendants for automated lines [3] tipping parts for pouring the solution when lifting them from the bath.

 Their disadvantage is the impossibility of obtaining high quality polishing. Details are placed in the suspension holder (basket) horizontally. Hydrogen generated due to electrolysis, disrupting contact between the electrolyte and the surfaces of parts, will leave unpolished bands on them.

 The aim of the invention is to increase labor productivity when electropolishing parts with concave surfaces through the use of mechanized or automated lines, as well as improving working conditions and safety of staff.

 This goal is achieved in that the suspension is divided into two parts, a double casing and a frame, interconnected by rotary rails with component holders, on which the workpieces and, if necessary, additional cathodes are mounted. The tool holders are connected by flexible current leads to both parts of the housing, through which positive and negative working electric currents respectively pass. Parts of the body are connected by dielectric rods, a frame made of dielectric material. A loop is fixed to the frame for capturing the suspension by an auto operator. Positive and negative electric currents from contacts on the bath seats are fed through the corresponding parts of the double housing, current leads and component holders to the workpieces and additional cathodes.

 When the operator lifts the suspension from the bath, the initially rising frame turns the rotary bars with holders attached to them, which overturn the processed parts, pouring the solution into the bath from their concave cavities. This prevents scooping it out of the bath and contaminating it with the next baths in the process cycle.

 The new property of suspension being shown to tip over vertically fastened parts to obtain high quality parts, pouring the solution from the concavities into the bath when the suspension is lifted from it, ensures its use on mechanized and automated lines with automatic operators for processing parts with concavities.

 A comparable analysis of the claimed solution with the prototype shows that the claimed suspension consists of two parts connected by rotary arms and moving parallel to each other with the vertical movement of the suspension. The workpieces are fixed with the holder parts to the rotary bars in a position that ensures high quality polishing, and rotate with them when lifting the suspension, pouring the solution from the concavities into the bathtub. This allows us to conclude that the claimed design meets the criterion of "novelty."

 Comparison of the claimed solution with the prototype and other known solutions in the field of electric polishing of metal surfaces shows that it shows a new property to pour the solution from the concavities of the parts into the bath, to prevent its increased consumption and pollution by the bathtubs following the technology, and at the same time to ensure high quality processing does not repeat the distinguishing features known from other solutions. The design creates a new consumer property, which allows us to conclude that its criterion of "significant differences" is met.

 The invention is illustrated by drawings. In FIG. 1 pendant with parts, as an example taken pouring spoons of the kitchen set, and additional cathodes in the bath in working condition. In FIG. 2 its top view.

 The suspension consists of a double housing 1, on one part of which passes a positive, and on the other a negative electric current. Both parts are interconnected by dielectric rods 2. A frame 6 with a loop 7 is fixed to the housing 1 by rotary bars 3 and axes 4, 5 for the line to be captured by the operator. On the strips 3 there are installed tool holders 8 for fastening the workpieces 9 and additional cathodes 10, which are connected by flexible current leads 11, for example, antenna cables, to both parts of the housing 1. Moreover, each component 8 is connected to only one part of the housing 1. To the double housing 1 is attached counterweight 12 for better turning of parts. A suspension with parts is mounted on seats 13 with electrical contacts 14, 15 of the bath 16.

 Suspension works as follows. At the starting position of the line, on the one side of the frame 6, parts 9 are installed in the component holders 8, additional cathodes 10 are installed on the other. 10. The auto operator, capturing the suspension by the loop 7, transfers and installs it on the seats 13 of the bath 16, connecting the parts 9 and additional cathodes 10 through component holders 8 and current leads 11 to the contacts of the positive 14 and negative 15 working electric current at the seats 13 of the bath 16. The process of electro polishing begins. After graduation, the operator takes the suspension by the loop 7 and raises it up. At first, the frame 6 rises, while the counterweight 12 holds the twin body in place, the trims 3 rotate around the axes 4, 5 until they occupy a vertical position. When the strips 3 are rotated, the component holders 8 mounted on them rotate the parts 9 by an angle of about 90 degrees, pouring the solution into the bath from the concave cavities. Next, the auto operator lifts the entire suspension and transfers it to the next technological operation. In the bath, the parts during processing are in a vertical position, which ensures high quality polishing.

 The claimed suspension, providing the pouring into the bath of the solution from the concave surfaces of the parts, eliminates scooping it out of the bath and contaminating it with the next baths in the technological cycle. At the same time, it allows vertical concavity upward placement of parts in the bath, providing high quality polishing. Under the concavities, when they are "up", hydrogen is collected, isolates the electrolyte from the surface of the part, leaving an unpolished spot in this place. When the part is arranged with concavity "to the side", the generated hydrogen, rising by a trickle along the concavity, will leave an unpolished strip on it. The indicated properties shown by the suspension determine its use for processing parts on lines with auto operators and thereby increase labor productivity in comparison with manual loading and unloading, which are forced to be used to prevent electrolyte scooping. The workplace of the maintenance personnel using the declared suspension was transferred to the beginning of the line to its starting position from the bath with harmful fumes and the inevitable contact with electrolyte on a person. This allowed to improve the safety and working conditions of staff.

Literature
1. A. F. Krainev. Dictionary reference to mechanisms. M. Engineering, 1987 p. 88 89.

 2. RD5. 9864-81. Electrochemical polishing. Technical requirements and typical technological processes, p.17, Fig.3.

 3. Copyright certificate of the USSR N 1002414, cl. C25D 17/06, 1983.

Claims (1)

 Suspension for polishing on mechanized lines, containing a double casing, a frame with a loop connected by rotary strips providing parallel movement of the frame relative to the casing, current leads, rotatable parts, characterized in that the parts are fixed on the pivots connecting the frame and the frame.

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