RU2387624C2 - Installation for group pressing - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: installation comprises hydraulic press, on fixed plate of which there are the following components fixed - reinforced chamber and rigid support for transfer of press force to puncheons of dies. Reinforced chamber is equipped with split bottom in the form of carriage installed on technological plate of press movable table. Carriage is equipped with drive and cassette with separate cells for dies. Outer longitudinal walls of cells are arranged as perforated. Transverse walls are arranged in the form of limiters of press movable table stroke. Mentioned limiters interact with rigid support. Cells are pairwise covered by detachable covers with holes for puncheons of dies.

EFFECT: invention provides for the possibility of safe highly efficient pressing in presence of service personnel directly near press.

3 cl, 3 dwg

Description

The claimed technical solution relates to the field of material processing by pressure and can be used in group pressing of low-power charges from explosive compositions (AC).

Known hydraulic press mod. DO437 for pressing products from asbestos, rubber and other materials, having a fence that protects the workshop air from gas contamination formed during the pressing of products (Forge-and-press machines. Catalog. Scientific-Research Institute of Information on Mechanical Engineering, 1976).

These hydraulic presses are widely used for pressing products from various materials, however, they cannot be used for pressing aircraft in the presence of maintenance personnel, since in case of an emergency the products of aircraft explosion can injure workers.

A known installation is the pressing of thermoplastic materials, including aircraft, which contains two hydraulic presses placed in a reinforced concrete armored car, while the molds are fed into the armored car via a gateway gate device using a step conveyor (RF patent 2207953, July 10, 2003). , В29С 43/04, В30В 11/00, С06В 21/00).

Installation during pressing of the aircraft provides reliable protection for staff who are outside the armored car, however, the high cost of a protective reinforced concrete armored car with a sluice gate device in combination with a large auxiliary cycle time, which determines the low productivity of the installation, makes the known technical solution unjustified and inappropriate for pressing small low power charges.

Also known is the installation of single-piece pressing of low-power charges from the aircraft, which contains a hydraulic press, an armored chamber with a protective gate and an exhaust pipe mounted on a movable table of the press, and a hard stop on a fixed press plate interacting with the mold through an opening in the lid of an armored car (RF patent 2242368, 12/10/2004, B30B 11/06, C06B 21/06 - prototype).

The installation provides reliable protection for staff, allows the process of pressing low-power charges from the aircraft in the presence of people directly at the press and ensures their safety in the event of an emergency, but has the following disadvantages:

a) a movable exhaust pipe of an armored camera (together with a press table), which requires an appropriate opening in the wall or window of the room, in particular, insulation of the opening in the cold season;

b) the movable coupling of the hard stop and the seal of the opening of the upper cover of the armored chamber, which leads to wear of the seal and its periodic replacement;

c) piece pressing charges, which inhibits the growth of plant productivity;

d) the impossibility of organizing group pressing of charges, since in the event of the operation of one of the charges (emergency), detonation can be transferred to neighboring charges;

e) manual exchange of molds for pressing positions inside the armored chamber with the manual drive of the protective gate, which increases the complexity of the process and the monotony of the staff;

e) the inability to extinguish a possible fire of the aircraft inside the armored camera in an emergency;

g) the lack of protection of the working area of the staff in case of exhaust of individual particles of the air-gas mixture through the clearance gaps of the armored chamber and the protective gate in an emergency.

The objective of the proposed technical solution is to create an inexpensive compact unit with increased productivity for group pressing of low-power charges from the aircraft, allowing the process of pressing charges in the presence of people directly at the press and to ensure the safety of staff in case of emergency.

The essence of the inventive installation for group pressing, providing a solution to the problem, is as follows:

- the armored chamber, together with the rigid stop, is fixed on the fixed plate of the press and equipped with a detachable bottom in the form of a carriage with a drive mounted on the technological plate of the movable table of the press of the press for moving between the pressing positions and preparing the molds and the cassette with separate mold cells;

- the outer longitudinal walls of the cassette cells are perforated to divert the shock wave and the air-gas mixture from the cells into the armored chamber in case of an emergency, and the transverse walls are made in the form of limiters of the working table of the press table interacting with the rigid stop to prevent recharging of charges;

- cassette cells are paired with removable covers with holes for mold punches that hold the products of the explosion in a separate cell in the event of an emergency and help to remove the shock wave and air-gas mixture in the armored chamber through perforation of the longitudinal wall of the cell;

- a protective screen mounted on the upper fixed plate and the lower fixed base of the press, provides protection for the working area of the staff in case of exhaust of individual particles of the gas-air mixture through the clearance gaps of the walls of the armored chamber and the carriage under shock pressure in an emergency;

- an autonomous local fire extinguishing system with a constant supply of water ensures quick filling of all carriage cells with molds and charges in case of emergency fire dust during pressing, eliminating the development of possible thermal processes.

The proposed installation for group pressing does not require any special conditions for use and can be used in almost any production room.

Other technical solutions with signs partially coinciding with the distinguishing features of the inventive installation for group pressing, not identified.

Figure 1 shows a General view of the installation for group pressing;

figure 2 - section aa in figure 1,

figure 3 is a section bB in figure 1.

Installation for group pressing (figure 1, 2, 3) contains a hydraulic press 1, on a movable table which cantilevered technological plate 2 with a carriage 3.

On the basis of the carriage 3, which is the detachable bottom of the armored car 6, a cartridge 4 is rigidly fixed, in each of the six cells of which one interchangeable compression mold 5 is installed for pressing charges. The longitudinal walls of the cassette on the outside of each cell have perforations in the form of holes for depressurizing and air-gas mixture in the armored chamber 6 in case of emergency.

The pneumatic actuator 7 is designed to move the carriage 3 on the technological plate 2 between the position of pressing charges and the position of preparing the molds 5.

On the worker’s side, a protective screen 8 with a pneumatic drive is fixed on the upper fixed plate and the lower fixed base of the press 1, a technological plate 2 is cantilevered in the window of the protective screen for moving the carriage 3.

An exhaust pipe 9 is mounted on the rear wall of the armored camera 6, passing through the wall of the industrial building to remove the explosion products (in case of emergency) outside the premises.

Inside the armored chamber 6, a fixed stop 10 is fixed for transferring the press force to the punches of the molds 5 when pressing charges, interacting at the end of the working stroke of the press table with the transverse walls of the cassette cells (limiters of the working stroke of the press table) to prevent recharging of the charges, while the walls of the armored chamber 6 located with a minimum clearance around the perimeter inside the walls of the carriage 3 to localize the products of the explosion inside the armored car 6 in case of emergency.

The cells of the cassette 4 are pairwise closed by removable covers 11 to hold the explosion products inside the cell in case of an emergency and deflect the shock wave pressure through the perforation of the outer wall of the cell in the armored chamber 6. The removable covers 11 have through holes for the punches of the molds 5.

On the back wall of the fixed press plate 1, a tank 12 of an autonomous local fire extinguishing system with a constant supply of water is installed, which ensures high performance while filling all the cells of the carriage 3 together with molds 5 and cases with aircraft charges in case of emergency.

The tank 12 is connected to the armored chamber 6 with two water pipes 13, the outlets of which inside the armored chamber are closed by flange knockout plugs 14.

The worker servicing the installation is located directly near the press 1 and manually ensures the exchange of product bodies with charges in the molds of 5 cells of the carriage 3 at the position of preparation of the molds outside the armored chamber.

The installation is as follows. At the position of preparing the molds outside the armored chamber, the employee installs the body of the product into which the aircraft hinge is filled; in pairs, closes the cells with removable covers 11, through the openings in which it installs punches in the molds, and presses the "Start" button of the control system that determines the start of the automatic part of the full working cycle.

The pneumatic actuator 7 moves the carriage 3 to the pressing position, the protective screen 8 is closed; the press table 1 moves upward together with the technological plate 2 and the carriage 3; the armored chamber 6 enters with a minimum clearance along the perimeter into the walls of the carriage 3; the punches of the molds 5 interact with the hard stop 10, providing pressing charges into the body of the product. At the end of the working stroke of the press table with a hard stop 10, the transverse walls of the cassette 4 (limiters of the working stroke of the press) interact, excluding the re-charging of charges in the product bodies; then the movable table of the press 1 returns to its original position, the protective screen 8 opens, the pneumatic actuator 7 returns the carriage 3 to its original position at the position of preparation of the molds.

In the event of a charge explosion in one of the carriage cells during pressing (emergency), the worker is reliably protected by the rigid steel walls of the armored chamber 6 and carriage 3, as well as a protective screen 8; the explosion products through the perforated outer wall of the cell under the pressure of the shock wave enter the armored chamber 6 and then through the exhaust pipe 9 are removed outside the production room.

In this case, a local fire extinguishing system is activated, water from the tank 12 under pressure of compressed air (0.4 ... 0.6 MPa) moves through the pipes 13, pushes the plugs 14 inside the armored camera and fills all the cells of the cartridge 4 on the carriage 3 together with the molds and cases of products with charges from the sun.

After the carriage 3 is returned to its initial position, the worker removes the punches of the molds 5 and the cover 11, removes the finished product bodies from the molds with pressed charges, installs the next ones prepared for pressing the product body with the aircraft hinges, installs removable covers 11 and punches of molds 5. Next, after pressing the “Start” button, the work cycle is repeated.

Thus, the installation provides group pressing of low-power charges from the aircraft in the presence of service personnel directly at the press, which determines high productivity with low installation cost and safe process control.

Claims (3)

1. Installation for group pressing low-power charges from explosive compositions, containing a hydraulic press, molds with punches, an armored chamber with an exhaust pipe and a hard stop for transferring the force of the hydraulic press to the punches of the molds, characterized in that the armored chamber is fixed with a rigid emphasis on a fixed plate of the press and is equipped with a detachable bottom in the form of a carriage with a drive and a cassette with separate cells for molds mounted on the technological plate of the movable table of the press, with external longitudinal walls cells ki perforated their transverse walls are designed as stroke limiters press the movable table having the ability to interact with the rigid stop, while cells blocked in pairs with removable covers for openings punches molds. 2. Installation according to claim 1, characterized in that it is equipped with a protective screen mounted on a fixed plate and the base of the press. 3. Installation according to claim 1, characterized in that the armored camera is equipped with an autonomous local fire extinguishing system.

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