CZ20014547A3 - Briquetting process of metal chips and briquetting press therefor - Google Patents

Abstract

The invention relates to a method of operating a briquetting press and to a briquetting press. The aim of the invention is to increase the throughput of compacted articles (10) that are produced from metal shavings (10.1) and the rate of utilization of the hydraulic drive system. To this end, two compaction piston (2) that are operated alternately in the compaction cylinders (1) shape the respective compacted article (10) against the pressure of at least one compaction piston (4) that works in the compaction cylinders (1).

Description

(57)

The method of briquetting of metal chips (10.1) consists of pressing two alternating tens in the press sleeves (1) by working punches (2), each of which deforms the compact (10) in the press sleeve (1) against the pressure of at least one press. the sleeves (1) of the working third punch (4). The briquetting press consists of two pressing sleeves (1) in which the punch (2) and at least one third punch (4) for the back pressure which is guided in the pressing sleeves (1) are sliding back and forth, the first punch (2) it is in the pressing position when the second punch (2) is in the rear position and the third punch (4) is in an analogous position.

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Method of briquetting of metal chips and briquetting press

Technical field

The invention relates to a method for briquetting metal chips in a hydraulic briquetting press and a briquetting press for carrying out the method.

BACKGROUND OF THE INVENTION

According to DE 39 788 A1, in which the pressing of the metal of at least one molding material is carried out in the pressing metal shavings by means of a rammer, the radially assigned method is carried out as follows:

known briquetting presses, briquette chips by means of a sleeve into which the metering device for the bale sleeve is dispensed.

- forward movement of the stamper, housing, filling and closing of the presser

- moving the punch forward and transporting the metal chips into the pressing part of the pressing sleeve,

- compression action by the punch on the metal chips up to the final pressure Pmax or the necessary pressure to achieve Perf,

- any reciprocating movement of the second punch and stamping of the finished compact as a briquette by the first punch, and

moving the first plunger back and possibly the second plunger forward to the starting position.

Compared to existing briquette pressing, the pre-characterized, double-action briquetting press first produces a molding that has a particularly high compaction that reaches close to the metal's own density and, on the other hand, achieves high performance so that optimum between high density and high výkenem. In addition, briquettes of greater length can be produced in comparison with the one-sided pressing, since theoretically still possible stroke lengths have to be limited in practice with regard to the machine design.

However, in double-action briquette pressing, it is problematic to achieve a possible and permissible briquette molding length with an extremely low tolerance. It is then disadvantageous that, although the maximum pressing pressure is applied, the maximum possible filling volume in the pressing sleeve is not usable in terms of the length of the briquette.

In order to solve the problem, the method according to DE 199 17 421.0-14 has been proposed, while maintaining the aforementioned principle of advantageous operation, in which the maximum weight output of the pressed metal chips is achieved by utilizing an achievable nominal briquette length by . The respective briquetting press for carrying out the process is provided with technical means which cause improved metering of the metal chips.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The object of the present invention is to provide a method and a hydraulically operated briquetting press for briquetting metal chips, which is fed to the press sleeve by a rammer in a repeatable cycle, then the press sleeve is closed. The briquetting press has a compact structure, on the one hand reducing the ejection cycle for the compact and optimizing the hydraulic system.

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According to the invention, this object is achieved by a process with the features of claims 1 to 4 and a briquetting press with the features of claims 5 to 12.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is described in principle on two exemplary embodiments by means of the drawings. The drawings show:

FIG. 1 shows a schematic illustration of briquetting pressing with axially positioned press sleeves; FIG. 2 shows the principle of connection through a longitudinal bore and cam between the punch and the bottom of the press sleeve; and FIG. 3 shows a diagram of briquetting pressing with parallel press sleeves.

DETAILED DESCRIPTION OF THE INVENTION

In the method according to the invention, it is typical that the two punches 2 operating in a variable cycle in the two press sleeves 1 against the pressure of at least the third punch 4 operating in the press sleeve 1 alternately deform and eject the metal chip blank 10.1. To this end, two variants of the briquetting molding method as set forth in claim 3a in claim 4a with respect to the arrangement in claim 6 and in claim 7 are used.

According to Figs. 1 and 2, the design variants of briquetting pressing comprise a press sleeve 1 with an upper part 1. 1 and bottom part 1.2. Punches 2 are guided in the press sleeves 1, which act as a building unit in cooperation with the pistons and hydraulic cylinders 2.1. To create back pressure

4 again use the third punches 4, guided in the press sleeves 1, which also work as a building unit in other hydraulic cylinders 4.1.

Above the press housing 1 are formed shafts 5 with openings 6 to the interior of the press housing 1, by means of which they are fed into the press housing 1 by means of a ram 3 driven by a further hydraulic cylinder 3.1 of metal chip 10.1.

The finished molding 10 is ejected by means of an ejection hole

7 below the compression sleeves 1. A corresponding ejection hole 7 is formed when the respective lower part 1.2. 2, which is connected to the punch 2 by means of the longitudinal bore and cam connection shown in FIG. 2, after pressing it moves together with the punch 2 moving back, but is delayed depending on the path. To ensure ejection of the compact 10 and to prevent the compact 10 from dragging back with the returning base 1.2. The upper part 1, 1 is provided with a hydrauck-operated stop 9. This starts to act as the lower part 1.2 moves back and blocks the compact 10 so that it can adapt to the ejection hole 7.

Hydraulic cylinders 2.1. 3.1 and 4.1 are connected by hydraulic lines 11. These are connected to the hydraulic pump 12 and the hydraulic reservoir 13. The lines 11 are provided with control and / or honest valves 14, respectively. The control of the movement and function takes place according to the usual hydraulic rules.

The invention exists in two constructional variants. FIG. 1 shows a briquetting press in which the press sleeves 1 lie on one axis and have a double-acting third punch 1 in only one other FIG. According to a press in which the presses are parallel, for which 9 9 9 9

9 9 9 9

1111911 9

19 9 9

9 99 ·

In the arrangement, each pressing sleeve 1 is provided with a third punch 4 for back pressure.

As is common in briquetting presses, the assemblies described, as well as the corresponding pressure sources, are provided with a base, frame or casing (not shown).

The invention is characterized by the alternating cycle of the pressing and ejecting moldings 10 produced in two pressing sleeves 10. In comparison with existing, also double-action briquetting presses, higher power and shorter cycle times are achieved, since no separate ejection stroke is realized.

Furthermore, the hydraulic system can be operated with higher efficiency and pump utilization.

By means of the movable lower part 1.2 of the pressing sleeve 1, a large filling volume for the pressed metal chips 10.1 can be used.

There is also a new aspect for abrasion protection, since the abrasion on the upper part 1.1 is small. This can optimize the design of the parts in terms of abrasion, including material selection and surface treatment.

Industrial applicability

In particular, the design variant according to FIG. 3 is compact and manufactured with few building blocks, since common roller bearings and a common charging and transport for both compression sleeves 1 are possible. The short path for hydraulic oil transmission ensures greater efficiency of the hydraulic operating system.

Claims (12)

PATENT CLAIMS A method of briquetting metal chips in a hydraulic briquetting press by pressurizing the molding (10) with a punch (2) in a press sleeve (1), wherein metal chips (10.1) are fed to the press sleeve (10.1) by a ram (3) comprising the following method steps: - forward movement of the ram (3), filling and closing of the compression sleeve, - moving the punch (2) forward and transporting the metal chips (10.1) into the pressing part of the pressing sleeve (1), pressure action by the punch (2) on the metal chips (10.1), and the reciprocating movement of the punch (2) and the embossing of the finished blank (10), and - moving the punch (2) back to its starting position, characterized in that it is pressed by two punches (2) alternating in cycle in the pressing sleeves (1), each of which deforms the molding (10) in the pressing sleeve (1) against pressure at least one of the third punch (4) operating in the press sleeves (1). Method according to claim 1, characterized in that the at least one third punch (4) is ejected alternately and presses the compact (10). Method according to claim 1, characterized in that the third punch (4) is used as a structural unit for alternating action in operation both in the first press sleeve (1) and in the second press sleeve (1). Method according to claim 1, characterized in that the third punches (4) are used separately for alternating action to work in the respective press sleeve (1). of Claims • · · · · · · · · · · · · · · · 9 9 9999 · · · · · · 98 9 «· * - 7 A briquetting press for carrying out the method according to one of 1 to 4, comprising functional assemblies such as - compression sleeves (1) with holes (6) for dosing metal chips (10.1) by means of rammers (3), - punches (2) guided in the press sleeves (1), and - the assemblies and the respective pressure source supporting the pedestal, frame or casing, characterized in that it consists of two press bushes (1) in which the punch (2) is slidably guided back and forth and at least one third punch (4) ) for the back pressure which is guided in the press sleeves (1), the first punch (2) being in the pressing position when the second punch (2) is in the rear position and the third punch (4) is in an analogous position. A briquetting press according to claim 5, characterized in that the press sleeves (1) are arranged coaxially, the third punch (4) being designed as a double action. A briquetting press according to claim 5, characterized in that the pressing sleeves (1) are arranged parallel to each other, wherein each pressing sleeve (1) is provided with a third die (4). Briquetting press according to one of Claims 5 to 7, characterized in that the pressing sleeves (1) are divided axially and consist of an upper part (1.1) and a lower part (1.2), the upper part (1.1) being fixed and the lower part (1.2) is displaceably mounted following the punches (2). A briquetting press according to claim 8, characterized in that a shaft (5) with openings (6) for filling the pressed metal chips (10.1) in which the stamper (3) is arranged is formed in the upper parts (1.1). ································· The briquetting press according to claim 8, characterized in that the lower parts (1.2) are placed in the closed end position when the punch (2) begins to move with a delay depending on the travel, so that an ejection opening (2) is formed 7) for molding (10). Briquetting press according to claim 10, characterized in that the third punch (4) and the lower part (1.2) are coupled to each other by means of a connection (8) by means of a longitudinal bore and a cam. A briquetting press according to claim 10, characterized in that stoppers (9) are provided on the upper parts (1.1), which are in the position blocking the molding (10) when the lower parts (1, 2) are moved back so that the molding ( 10) corresponds to the ejection opening (7).