RU222281U1 - Fiberglass composite screw - Google Patents

Abstract

The utility model relates to devices for connecting composite structures and can be used in assembling threaded connections. A screw made of a composite fiberglass material, containing a cone-shaped head with slots for a Phillips screwdriver, made with a stamp from a heated workpiece, and a rod with smooth and threaded parts, wherein the screw is made of fiberglass material, including a fiberglass base in the form of a fiber, impregnated with binding resins, and fiberglass the base in the form of a fiber, impregnated with binding resins, is made with the addition of quartz powder, pre-mixed in the resin. The technical result of the utility model is to increase the stability of threaded and spline connections by improving the rigidity of epoxy composites. 1 ill.

Description

Field of technology

The utility model relates to devices for connecting composite structures and can be used in assembling threaded connections.

State of the art

The known device is a carbon fiber composite material continuous bolt (CN Patent 111621119, Published 2020-09-04), characterized by using continuous carbon fibers as the reinforcing body of a carbon fiber composite material continuous bolt, imidazole epoxy resin is used as a matrix to prepare prepreg, the prepreg is prepared from 60-70% continuous carbon fibers, 20-30% imidazole epoxy resin and 5-15% curing agent by weight percentage, and a continuous carbon fiber composite material bolt is formed by curing the prepreg.

A disadvantage of the known device is the low stability of the threaded screw connection.

The closest known device is a screw made of composite basalt material (Patent RU 218713 MPK E04S 5/12. Published: 06.06.2023 Bulletin No. 16.), containing a cone-shaped head with slots for a Phillips screwdriver and a rod with smooth and threaded parts, while the screw made of a composite material, including a basalt base in the form of a fiber, impregnated with binding resins, a cone-shaped head with slots for a Phillips screwdriver, made with a stamp from a heated workpiece, and the basalt base in the form of a fiber, impregnated with binding resins, is made with the addition of 90 microns of basalt powder, pre-mixed in resin. The disadvantage of the closest device is the low stability of the threaded screw connection.

Disclosure of utility model

The technical result of the utility model is to increase the stability of threaded and spline connections by improving the rigidity of epoxy composites.

This technical result is achieved in a device - a screw made of composite fiberglass material, containing a cone-shaped head with slots for a Phillips screwdriver, made with a stamp from a heated workpiece, and a rod with smooth and threaded parts, while the screw is made of fiberglass material, including a fiberglass base in the form of a fiber , impregnated with binding resins, and the fiberglass base in the form of fiber, impregnated with binding resins, is made with the addition of quartz powder, pre-mixed in the resin.

Distinctive features are a fiberglass base in the form of a fiber, impregnated with binding resins, made with the addition of quartz powder; the use of a device made of such material increases the stability of the threaded connection by improving the rigidity of epoxy composites by combining fiberglass fibers with quartz powder [3];

preliminary uniform mixing of quartz powder in the binder resin allows maintaining the stability of the threaded bolt connection due to the rigidity of hybrid epoxy composites, and also maintains the stability of the slots for a Phillips screwdriver [4].

A comparison of the proposed solution with analogues and a prototype did not allow us to identify in them the features that distinguish the proposed solution; this allows us to draw a conclusion about compliance with the “novelty” criterion.

Brief description of the drawing

In fig. the frontal and profile views of the screw are shown, including: 1 - a screw body made of a material with a fiberglass base, impregnated with binding resins with the addition of quartz powder; 2 – cone-shaped head of the vita; 3 - smooth part of the screw rod; 4 - threaded part of the Vita rod; 5 - slots for a Phillips screwdriver.

Implementation of a utility model

The main raw material for the production of fiberglass propellers is glass roving. In addition, to make a screw from a composite you need: resin; winding harness in the form of glass roving, which goes to winding the body of the screw to create a rod, thread and head; ethanol; acetone; dicyandiamide; quartz powder obtained from quartz chips by grinding them in an AGO-2S planetary ball mill and sifting the fraction to 100 microns. The technology for producing a fiberglass screw is as follows. The roving threads from a special creel device enter the tension mechanism, in which they are arranged in the appropriate order. The threads arranged in a given order go through the stage of drying and preheating with hot air. The heated roving is immersed in an impregnation bath with resin, pre-evenly mixed with quartz powder in a mixer. A continuous composite rod is passed through a drawing mechanism, at the exit of which the rod is cut according to a given size. After the bath, the material is pulled through a die to obtain a screw body 1 of a given cross-sectional area of the rod and its length, taking into account the formation of a conical head 2. A stamp from a heated workpiece is used to make a conical head 2 and slots 5 for a Phillips screwdriver.

The profiling die can be made, for example, in the form of a detachable steel structure, consisting of two rectangles with a milled and grooved half-figure along the length of each part, which, when closed, form a surface in the form of a circle corresponding to the area of the target device. Hot stamping of the screw head blank 2 is carried out in three positions of technological transitions. At the first stamping position, the workpiece is calibrated and the formation of the screw head 2 begins. Starting from the second stamping position, the formation of a cone-shaped screw head 2 begins and its formation continues to the smooth part 3 of the rod and the threaded part of the screw body 4. At the third stamping position, the formation of a part of the rod is completed for the thread in the screw blank. To work with a knurling rod, the rod is made along the average diameter of the thread. The knurling has a intake cone with the same profile when viewed from the end, and with the full height of the thread. The thread is made using a knurled extrusion tool.

When producing a composite screw, a three-position automatic press is used.

The prepared screw goes through a tunnel oven designed to speed up the polymerization process of impregnating resins. The hot propeller is sent into a cooled bath, where it is completely cooled under running water. Cooled screws on a lathe undergo thread calibration 4. The uniaxial compressive strength of quartz is on average 280 MPa [5], this increases the surface stability of the device.

The inventive device increases the stability of the threaded connection during its operation and eliminates their possible weakening due to the addition of quartz powder pre-mixed in resin.

Information sources

1. Patent CN 111169038. Published 2020-01-03;

2. Patent RU 218713 IPC E04C 5/12. Published: 06.06.2023 Bulletin. No. 16;

3. Hybrid effect of basalt fibers and basalt powder on the thermomechanical properties of epoxy composites. Composites Part B: Mechanical Engineering, Vol. 125, 2017, pp. 157-164.

4. Gavrilov M.A. Production technology and chemical and biological resistance of epoxy composites based on industrial waste. dis. Ph.D. tech. Sciences, p. 278 p. 128,133-134. http://dissovet.pguas.ru/files/212-184-01/Gavrilov/Dissertaciya_GavrilovMA.pdf.

5. Fundamentals of rock physics, geomechanics and rock mass control. Portsevsky A.K., Katkov G.A. UMO stamp (No. 51-73 dated June 28, 2004) Registered with the Federal Agency for Education (No. 5374 dated November 16, 2005), 120 p. With. 21. https://yandex.ru/search/?text=%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B0+%D0%B3%D0%BE%D1% 80%D0%BD%D1%8B%D1%85+%D0%BF%D0%BE%D1%80%D0%BE%D0%B4+%D1%83%D1%87%D0%B5%D0%B1 %D0%BD%D0%B8%D0%BA+%D0%B4%D0%BB%D1%8F+%D0%B2%D1%83%D0%B7%D0%BE%D0%B2&clid=2233626&search_source=dzen_desktop_safe&src=suggest_Pers&lr =212153.

Claims (1)

A screw made of a composite fiberglass material, containing a cone-shaped head with slots for a Phillips screwdriver, made with a stamp from a heated workpiece, and a rod with smooth and threaded parts, wherein the screw is made of a fiberglass material, including a fiberglass base in the form of a fiber, impregnated with binding resins, characterized in that that the fiberglass base in the form of fiber, impregnated with binding resins, is made with the addition of quartz powder, pre-mixed in the resin.