RU2027605C1 - Spamping press with pulsed loading - Google Patents

Abstract

FIELD: forging and pressing machine building. SUBSTANCE: toroidal shell is moved by compressed air along section 2 of cylinder body and brings torus 7 up to speed. The torus moves rod 8. The rod is accelerated and transfers kinetic energy to stamp 9. EFFECT: high productivity. 1 dwg

Description

 The invention relates to forging and pressing engineering.

 A device is known for stamping with a pulsating load, comprising a fixed part of a stamp mounted on a bed, a slider with a movable part of the stamp, a slider drive made in the form of a worm-screw mechanism with a hydraulic safety device.

 As a prototype, a hammer was selected containing a bed with a fixed part of the stamp and the drive stamp, while the drive of the stamp is made in the form of a cylinder, piston and rod, one end interacting with the piston, and the other end with the rod.

 A disadvantage of the known devices is the low efficiency.

 The purpose of the invention is improving efficiency.

 The goal is achieved by the fact that in the press for stamping operations with a pulsating load containing the frame, the power cylinder with a housing mounted on the frame, a piston and a rod, while in the housing from the rod and piston cavities are made channels for supplying compressed air, according to the invention, the housing made with a stepped inner cavity, the larger diameter of which is made on the site located on the side of the rod cavity, the piston is made of elastic material in the form of a toroidal and annular hollow shells, filled with a working medium under pressure and installed one after another on the rod in the direction of the working stroke with the possibility of rolling between the body and the rod, while the annular shell is made with a larger outer diameter than the toroidal one and is located in the cavity of the large diameter cylinder body. An additional channel for supplying compressed air adjacent to the area with a small diameter is also made in the housing.

 The drawing schematically shows the proposed press for stamping operations with a pulsating load.

 The press contains a cylindrical body, which is made with a stepped internal cavity and includes a section 1 of a cylinder of large diameter, a section 2 of a cylinder of a smaller diameter and a section 3 from the side of the rod cavity. A channel 4 for supplying compressed air is made in the housing in section 1 of the cavity of a large-diameter cylinder adjacent to section 2 with a small diameter. Section 2 of the cavity of the cylinder of small diameter communicated with the channel 5 for supplying compressed air. An annular 6 and toroidal 7 hollow shells, which are made of an elastic material, are filled with a working medium under pressure, and are installed one after another on the rod 8 with the possibility of rolling. A stamp 9 is installed on the stem 8. A second stamp 10 is mounted on the bed 11. A portion 1 of the cavity of the large-diameter cylinder is in communication with the channel 12 for supplying compressed air. Section 2 of the cylinder body is equipped with a valve 13, and section 1 of the cylinder body with valves 14, 15.

 The press operates as follows.

 Channel 4 injects compressed air into section 1 of the cavity of the cylinder of large diameter. Through channel 5, compressed air is pumped into section 2 of the cavity of the cylinder of smaller diameter. The toroidal hollow shell 7 begins to move along the portion 2 of the cylinder cavity. The friction surface of the toroidal hollow shell 7 against the cylindrical body in section 2 decreases all the time, as soon as it reaches a critical area, the toroidal hollow shell 7 begins to slide over section 2. The pressure force of the compressed air acting on the annular hollow shell 6 grows, and the annular shell 6 begins to roll over in section 1 of the cylinder body, accelerating the toroidal hollow shell 7. The speed of the toroidal hollow shell 7 is twice the speed of the annular hollow shell 6. When rolling the toroidal hollow shell 7, the rod 8 begins to move, the speed of which is twice the speed of the toroidal hollow shell. The rod accelerates and its kinetic energy, the annular hollow shell 6 and the toroidal hollow shell 7 is transferred to the stamp 9. High-pulse stamping occurs. Then, compressed air is pumped through channel 12 into a portion 1 of the cylinder cavity and the system is returned to its original position. The exhaust air is squeezed out by an annular hollow shell 6 and a toroidal hollow shell 7 through valves 13, 14, 15.

 The use of the invention provides an increase in efficiency due to synchronous pressing. In this case, uniform pressing of the material occurs over the entire height of the product.

Claims (1)

 PRESS FOR STAMPING WITH PULSE LOAD, comprising a bed, a power cylinder with a body mounted on the bed, a piston and a rod, while channels for supplying compressed air are made in the body from the side of the rod and piston cavities, characterized in that, in order to increase the efficiency , the housing is made with a stepped inner cavity, the larger diameter of which is made on the site located on the side of the rod cavity, and the piston is made of elastic material in the form of a toroidal and annular hollow shells, fill pressure medium and installed one after the other on the rod in the direction of the working stroke with the possibility of rolling between the body and the rod, while the annular shell is made with a larger outer diameter than toroidal, and is located in the cavity of the cylinder body of large diameter, and in the body is made an additional channel for supplying compressed air located on a portion of the cavity of the cylinder of large diameter adjacent to the area with a small diameter