SU1613342A1 - Arrangement for manufacturing abrasive tools - Google Patents

Abstract

The invention relates to the manufacture of an abrasive tool on phenolic binders. The purpose of the invention is to improve the quality of the tool and reduce metal consumption. The device for manufacturing an abrasive tool includes thermo-bimetallic power elements, heaters, a mold with an abrasive mixture, a vacuum chamber, the body of which is made in the form of a welded sealed structure and is additionally equipped with a three-stage movable ring that interacts with an elastic body sealing element. The case of the vacuum chamber consists of a lower solid base 1, vertical support columns 2, hermetically interconnected by thin walls 3 and fastened to the upper fixed plate 4, which is made with a hole and interacts on the inner cylindrical surface with a middle step of a three-stage movable ring 5, the bottom end which is in contact with the upper thermo-bimetallic plate 6. On the lower solid base 1 there are installed the lower thermo-bimetallic plate 7, the heater 8, and also the mold 9 abrasive mixture. A block from the upper thermo-bimetallic plate 6 and the upper heater 10 is mounted on the mold 9, which is connected to an electric power block 12 through contacts. To seal the power bakelizer, a sealing element 13 is installed on the upper end surface of the fixed plate 4, which contacts the bottom end surface of the ring 5. 2 z.p. f-ly, 2 ill.

Description

1

supporting racks 2, hermetically interconnected by thin walls 3 and fastened to the upper fixed plate, which is made with a hole and interacts on the inner cylindrical surface with the middle step of the three-stage movable ring 5, the lower end of which is in contact with the upper thermal-metal plate 6. On the lower solid base 1, a lower thermo-bimetallic plate 7, a heater 8, as well as a mold 9 with an abrasive mixture are installed. A block from the upper thermo-bimetallic plate 6 and the upper heater 10 is mounted on the mold 9, which is connected to an electric power pad 12 through the contacts. To seal the power bakelizer, a sealing element 13 is installed on the upper end surface of the fixed plate 4, which contacts the lower end surface of the ring 5 2 Cf.-ly, 2 ill.

The invention relates to the manufacture of abrasive tools on phenolic binders and can be used to produce high-speed grinding wheels with a diameter of up to 600 mm for cleaning the defective surface of rolled products and ingots in ferrous metallurgy in the processing of structural, tool, corrosion-resistant and heat-resistant steels and alloys.

The purpose of the invention is to improve the quality of the abrasive-abrasive tools and reduce the metal intensity of the process equipment.

Fig, 1 shows the device, axial section; figure 2 - section aa in figure 1.

The vacuum power bakelizer consists of a body, made in the form of a welded hermetic structure and consisting of a bottom solid base 1, vertical support struts 2. hermetically connected; interconnected by thin walls 3 i and fastened to the upper fixed plate; three, which is made with a hole and: interacts on the inner cylindrical surface with the middle stage of a three-stage movable ring 5, the lower end of which is in contact with the upper thermo-bimetallic plate 6. On the bottom solid base In Fig. 1, the bottom thermo-bimetallic plate 7, the heater 8 and the mold with the abrasive mixture 9 are installed. On top of the mold 9 there is a block of the top thermo-bimetallic plate 6 and the top heater 10. On the upper end surface of the fixed plate 4 there is a sealing element 13 is in contact with the lower end surface of the ring 5.

Fixing the position of the three-stage ring 5, and with it the thermo-bimetallic plate 6 and the heater 10, also

the compressed state of the abrasive mixture is carried out after hot pressing by means of a nut 14 and a stud 15, which cooperates with a fixed plate 4. Sealing the internal cavity of the three-stage rolling ring 5 is carried out by a sealing element 16, a cover 17 and bolts 18. For pumping air into the wall of the power bakelizer a pipe 19 is integrated. The upper movable three-stage ring 5 is transported with an eyebolt 20. And the upper heater block — a thermo-bimetallic plate — an eye bolt, m 21, is transported.

Vacuum power bakelizer works as follows.

Before start.y | power supply, temperature measuring device and vacuum pump are connected to a vacuum power bakelizer. The nuts 14 are pre-loosened and the block of the upper thermo-metallic plate 6 and the heater 10 are removed using the eyebolts 21.

Outside of the vacuum power bakelizer, an abrasive mixture is laid in the mold 9 and under the press cold pressing of the workpiece circle PP6x75x203 is performed. Then a mold with an abrasive mass is placed on the lower heater 8. A block of the upper heater 10 and the thermo-bimetallic plate 6 is mounted on the mold with the help of eyebolts 21. The electrical contacts 11 of the upper heater 10 interact with the fixed electrical contacts. A three-stage ring 5 is then installed together with a lid 17. The ring is sealed with the elements 13 by screwing the nuts 14 over the studs 15. The heating, the meter and the vacuum pump are turned on. When the temperature of the abrasive mixture reaches 90-100 ° C, the cover 17 is removed and the vacuum power bakelizer is fed under the press and through the cavity of the ring 5 by the punch

press through the upper thermo-bimetallic disk and the heater, the abrasive mixture is hot pressed at the moment of its greatest fluidity. Simultaneously with the hot pressing, the bakelizer is forcefully closed by tightening the nuts 14 through the studs 15 mounted on the movable plate 4. The interaction of the fixed plate 4, studs 15, nuts 14, the three-stage ring 5 and the upper thermo-bimetallic plate 6 makes it possible to fix the compressed state abrasive mixture and with further heating up to 185 ° C to ensure the force of the tool to be prepared with thermobimetallic plates under the conditions of limiting their deflection by the ring 5.

After hot pressing, the cavity of the ring 5 is sealed with a cover 17 and further heating of the abrasive mixture and the thermo-bimetallic plates is carried out simultaneously to a temperature of 185 ° C with evacuation. After exposure, the apparatus is switched off and the mold is cooled with a crucible preform. After the end of the bakelization and evacuation process, the ring 5 and the upper thermo-bimetallic plate 6 and the heater 10 are removed, the press mold is removed with the tool blank, which is pressed out.

Further, the cycle of operation of the device is repeated.

Claims (3)

Invention Formula 1, A device for making an abrasive tool on an organic binder. including upper and lower thermo-bimetallic power elements, heaters, a mold, a vacuum chamber, characterized in that, in order to improve the quality of the tool and reduce metal consumption, the vacuum chamber body is made in the form of a welded hermetic structure consisting of a lower solid base, which are installed vertical bearing rack, hermetically 5 interconnected by thin walls and fastened to the upper fixed plate and the lid, made in the form of a three-stage ring, with the possibility 0 interaction on the inner cylindrical surface with the upper fixed plate and the possibility of contacting the lower end with the upper bimetallic plate, with axial holes for the threaded hole in the first stage joints of the upper fixed plate, and for sealing on the top end the surface of the fixed plate set. Flax elastic sealing element. 0 2. The POP.1 device is characterized in that the top cover is adapted for axial movement relative to the upper fixed plate. 3. Extrusion pop. 1, differing 5 with the fact that the upper heater and the thermo-bimetallic plate are connected in one block. FIG. 2