RU219170U1 - Fiberglass composite stud - Google Patents

Abstract

The utility model relates to the design of fasteners such as studs and can be used to assemble threaded connections in mechanical engineering. The technical result is to increase the stability of the threaded and edge connection of the stud by improving the rigidity of epoxy composites. The technical result is achieved by a stud made of a composite fiberglass material, containing a threaded part up to the shoulder and a threaded part at the opposite end of the stud, a shoulder for the stop, a hexagon and a cylindrical part, while the stud is made of a composite material, including a fiberglass base in the form of a fiber impregnated with binder resins, the hexagon is formed by a stamp from a heated workpiece, and the fiberglass base in the form of a fiber impregnated with binder resins is made with the addition of quartz powder, previously evenly mixed in the resin. 1 ill.

Description

Technical field

The utility model relates to the design of fasteners such as studs and can be used to assemble threaded connections in mechanical engineering.

State of the art

A bolt made of composite material is known (patent RU 214624 MPK E04C 5/12. Published: 11/08/2022, Bull. No. 31), containing a hexagonal head and a rod with smooth and threaded parts, while the bolt is made of a composite material, including a basalt base in in the form of a fiber, impregnated with binding resins, the hexagonal head is formed by a stamp from a heated billet, and the basalt base in the form of a fiber, impregnated with binding resins, is made with the addition of basalt powder, pre-mixed in the resin.

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

The closest known device is a continuous carbon fiber composite bolt (CN patent 111621119, published 09/04/2020), characterized in that continuous carbon fibers are used as the reinforcing body of a continuous bolt of carbon fiber composite material, imidazole epoxy resin is used as a matrix for prepreg, the prepreg is made from 60-70% continuous carbon fibers, 20-30% imidazole epoxy resin and 5-15% curing agent by weight percent, and the continuous carbon fiber composite bolt is formed by curing the prepreg.

The disadvantage of the closest device is the low stability of the threaded and edge connections.

Utility Model Disclosure

The technical result of the utility model is to increase the stability of the threaded and faceted connection of the stud by improving the rigidity of epoxy composites.

The present technical result is achieved in a stud device made of composite fiberglass material, containing a threaded part up to the shoulder and a threaded part at the opposite end of the stud, a shoulder for stop, a hexagon and a cylindrical part, while the stud is made of a composite material, including a fiberglass base in the form of a fiber impregnated binder resins, the hexagon is formed by a stamp from a heated workpiece, and the fiberglass base in the form of a fiber impregnated with binder resins is made with the addition of quartz powder, previously evenly mixed in the resin.

The hallmarks are

a fiberglass base in the form of a fiber impregnated with binder resins is made with the addition of quartz powder, the use of such a material increases the stability of the threaded joint by improving the rigidity of epoxy composites by combining fiberglass fibers with quartz powder [3];

preliminary uniform mixing of quartz powder in a binder resin, this preserves the stability of the threaded and edge joints due to the rigidity of hybrid epoxy composites [4].

Comparison of the proposed solution with analogues and the prototype did not reveal in them the features that distinguish the proposed solution, this allows us to conclude that the criterion of "novelty" is met.

Brief description of the figure

The figure shows a frontal view of the stud, including: 1 - threaded part to the collar, impregnated with binder resins with the addition of quartz powder; 2 - shoulder for emphasis; 3 - cylindrical part; 4 - hexagon, 5 - threaded part at the opposite end of the stud.

Implementation of the utility model

The main raw material for the production of fiberglass studs is glass roving. In addition, for the manufacture of a hairpin from a composite, it is required: resin; winding rope in the form of glass roving, which goes to the winding of the stud rod to create a thread and a shoulder; ethanol; acetone; dicyandiamide; quartz powder obtained from quartz chips by grinding it in an AGO-2S planetary ball mill and sieving a fraction up to 100 microns. The technology for the production of fiberglass studs is as follows. Roving threads from a special creel device go to the tension mechanism, in which they are arranged in the appropriate order. Arranged in a given order, the threads go through the stage of drying and preheating with hot air. Heated roving is immersed in an impregnation bath with resin, previously evenly mixed with quartz powder in a mixer. A continuous composite bar is passed through a pulling mechanism, at the exit of which the bar is cut to a predetermined size. After the impregnation bath, the material is pulled through the die to obtain the body of the stud of the cylindrical part 3, the given cross-sectional area of the rod and its length, taking into account the formation of the hexagon 4 by the stamp from the heated billet at a distance below the thread. The profiling die can be made, for example, in the form of a detachable steel structure, consisting of two rectangles with a half-figure milled and grooved 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. Next, a glass roving winding bundle is applied to the workpiece for the manufacture of the stud, which goes to the winding of the stud rod to create threads 1 and 5 on both sides, and the bead 4 is wound by winding.

In the production of composite studs, a three-position automatic press is used. Hot stamping of hexagon 4 is performed in three positions of technological transitions. At the first stamping position, the workpiece is calibrated and the formation of a hexagon 4 begins. Starting from the second stamping position, an internal hexagon 4 with ribs and edges is formed. At the third stamping position, the formation of the calibration of the rod for the shoulder 2 in the stud blank is completed. To work as a knurler, the rod is made along the average thread diameter 1 and 5. The knurler 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 by knurling by extrusion from both ends of the stud.

The prepared pin passes into a tunnel oven designed to accelerate the polymerization process of impregnating resins. The hot hairpin is sent to the chilled bathroom, where it is completely cooled under running water. The cooled stud on the automatic lathe is calibrated for threads 1 and 5 and the stop at the shoulder 2. In this case, the hexagon 4 is located between the cylindrical part 3 and the threaded part 5 at the opposite end.

The strength of quartz for uniaxial compression averages 280 MPa [5], which increases the surface stability of the device.

The inventive stud made of composite fiberglass material increases the stability of the threaded and edge connection of the key during its operation and eliminates their possible weakening.

Information sources

1. Patent RU 214624 IPC E04C 5/12. Published: 08.11.2022 Bull. No. 31.

2. Patent CN 111621119, Published 09/04/2020.

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

4. Gavrilov M.A. Production technology and chemical and biological stability of epoxy composites based on production waste. Dis. cand. 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 massif state control. Portsevsky A.K., Katkov G.A. UMO stamp (No. 51-73 dated 06/28/2004) Registered with the Federal Agency for Education (No. 5374 dated 11/16/2005), 120 pages. 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 stud made of a composite fiberglass material, containing a threaded part up to the shoulder and a threaded part at the opposite end of the stud, a shoulder for a stop, a hexagon and a cylindrical part, while the stud is made of a composite material, including a fiberglass base in the form of a fiber impregnated with binder resins, the hexagon is formed by a stamp from a heated billet, characterized in that the fiberglass base in the form of a fiber impregnated with binder resins is made with the addition of quartz powder, previously evenly mixed in the resin.

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