1. A prefabrication process method for connecting a semi-grouting sleeve and a steel bar comprises the semi-grouting sleeve and the steel bar, and is characterized in that the semi-grouting sleeve and the steel bar are welded into a whole by a friction welding process.

2. The prefabrication process of connecting semi-grouted sleeves with steel bars as claimed in claim 1, wherein the semi-grouted sleeves and the steel bars are connected by self-fusion without using welding material during friction welding.

3. The prefabrication process of a semi-grouted sleeve connected with steel bars as claimed in claim 1, wherein the steel bars and the semi-grouted sleeve are prefabricated pieces.

4. The prefabrication process of a semi-grouted sleeve in connection with steel reinforcement as claimed in claim 1, wherein the ends of the steel reinforcement are unthreaded.

5. The prefabrication process of a half-grouted sleeve connected with steel bars as claimed in claim 1, wherein the end of the half-grouted sleeve connected with the steel bars is also free of internal and external threads.

6. The prefabrication process of a semi-grouted sleeve in connection with steel reinforcement as claimed in claim 1, wherein the friction welding fuses the ends of the connected steel reinforcement to form an external crimp; the outer curled edge is reserved or turned to be a flat outer peripheral surface.

7. The prefabrication process method for connecting the semi-grouting sleeve and the steel bar according to claim 1, wherein the semi-grouting sleeve is formed by casting, turning, extruding or rolling, and a grouting nozzle and a grout discharging nozzle are arranged on the semi-grouting sleeve.

Background

The grouting sleeve for connecting the steel bars is widely used in prefabricated assembled house concrete members and is an important part for connecting the steel bars on site, the use of the grouting sleeve greatly improves the construction efficiency, and the time, labor and site cost are saved. The half grouting sleeve is one kind of the half grouting sleeve, the connection between the half grouting sleeve and the steel bar is a threaded connection (refer to the attached figures 3 and 4 in the specification), the end part of the steel bar needs to be machined into a thread, the machining cost is high, and the thread is easy to damage.

For example, in 2018, a roll-formed steel bar half-grouting sleeve and a connection structure thereof are disclosed in the chinese utility model patent (publication No.: CN208251467U), the steel bar half-grouting sleeve is composed of an assembly end sleeve and a prefabricated end sleeve, the assembly end sleeve is formed into a steel pipe with a group of rolling grooves on the outer surface of the cylinder wall through rolling, the cylinder wall of the assembly end sleeve is provided with a grouting port and a grout outlet, the prefabricated end sleeve is formed by integrally turning a steel bar or a thick steel pipe, an inner wall mantle fiber of the prefabricated end sleeve forms an internal thread, and the prefabricated end sleeve is inserted into the assembly end sleeve and is connected into a whole through a circle of welding ring. The connecting structure comprises a steel bar semi-grouting sleeve, an upper-layer prefabricated part and a lower-layer prefabricated part; the utility model discloses a half grout sleeve in need set up the block structure at prefabricated end telescopic tip, is carrying out conventional welding operation after cup jointing, and the structure is comparatively complicated.

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a prefabrication process method for connecting a semi-grouting sleeve and a steel bar, creatively uses a solid-phase welding method of friction welding, so that the sleeve is extremely simple in structure, free of welding materials, high in welding seam quality, firm and reliable in joint, energy-saving, environment-friendly, high in efficiency and low in cost, and is an ideal connecting mode.

In order to achieve the purpose, the invention adopts the technical scheme that:

a prefabrication process method for connecting a semi-grouting sleeve and a steel bar is characterized in that a friction welding process is adopted between the semi-grouting sleeve and the steel bar, and the semi-grouting sleeve and the steel bar are fused into a whole.

The semi-grouting sleeve and steel bar connection prefabrication process has the advantages that through the application of friction welding, welding materials are not needed and welding seams are not filled in the welding process of the steel bars and the semi-grouting sleeve, the raw material cost is saved, the welding is convenient and fast, the welding speed is high, and the site construction efficiency is high. No spark, gas or waste residue is generated in the welding process, the energy is saved, the environment is protected, and the required energy is low.

The reinforcing steel bar and the end part of the semi-grouting sleeve do not need to be threaded, and the processing cost is saved. Compared with the traditional threaded connection, the torque wrench is not needed, and the connection quality cannot be influenced due to the damaged or screwed threads; compared with the traditional threaded connection, the connection failure caused by the fact that the thread pair is damaged due to too large tightening torque can be avoided, and parts are wasted.

The welding seam after friction welding has high quality, and the problems of conventional welding seam defects, such as incomplete penetration, incomplete fusion, cracks, air holes, slag inclusion and the like, can not occur. The firmness of the connecting part of the end part of the plate grouting sleeve is superior to that of the conventional welding and threaded connection.

The friction welding process can realize high-quality welding among different materials, is beneficial to the optimized combination of different materials, reduces the material cost, and simultaneously realizes the combination of exerting the maximum effect of the mechanical properties of different materials.

Further, the reinforcing steel bars and the semi-grouting sleeves are prefabricated parts and can be respectively and independently prefabricated and produced.

Furthermore, the end part of the semi-grouting sleeve connected with the steel bar is also provided with no internal and external threads.

Specifically, the half grout sleeve is close to the tip of reinforcing bar connection is equipped with the axial blind hole, the axial blind hole is connected with radial row's thick liquid hole, radial row's thick liquid hole is connected with the mud discharging mouth.

Compared with the prior art, the invention has the beneficial effects that: 1. the prefabrication process for connecting the semi-grouting sleeve and the steel bar has the advantages that through the application of friction welding, the implementation result cannot cause the reduction of any section area including the sleeve and the steel bar, and the strength of the joint is higher than that of the connecting end of the steel bar of the threaded semi-grouting sleeve; in the welding process of the steel bar and the semi-grouting sleeve, welding materials are not needed, and no welding seam is filled, so that the raw material cost is saved; 2. the friction welding is convenient and quick, the welding speed is high, the on-site construction efficiency is high, no spark, no gas or waste residue is generated in the welding process, the energy is saved, the environment is protected, and the required energy is low; 3. the end parts of the steel bars and the semi-grouting sleeve do not need to be threaded, so that the processing cost is saved; compared with the traditional threaded connection, the torque wrench is not needed, and the connection quality cannot be influenced due to the damaged or screwed threads; the connection failure caused by the damage of the thread pair due to excessive tightening torque can be avoided, and parts are scrapped; 4. the quality of the welding seam after friction welding is high, and the problems of conventional welding seam defects, such as incomplete penetration, incomplete fusion, cracks, air holes, slag inclusion and the like, can be avoided; the firmness of the connecting end of the semi-grouting sleeve steel bar is superior to that of conventional welding and threaded connection; 5. the friction welding process can realize high-quality welding among different materials, is beneficial to the optimal combination of the materials of the sleeve grouting section and the semi-grouting sleeve steel bar connecting end, reduces the material cost, and simultaneously realizes the combination of exerting the maximum effect of the mechanical properties of different materials; 6. this half telescopic major component of grout sleeve grout section with half grout sleeve steel bar connection end can independent batch production preparation respectively, then carries out friction weld welded connection as required and is in the same place, can improve batch production's efficiency like this, has also simplified the production and processing degree of difficulty of current telescopic.

Drawings

FIG. 1 is a schematic connection diagram of a prefabricated structure for connecting a semi-grouting sleeve and a steel bar according to the present invention;

FIG. 2 is a schematic sectional view of a prefabricated structure in which a semi-grouting sleeve is connected with reinforcing steel bars according to the present invention;

FIG. 3 is a cross-sectional view of a conventional semi-grouting sleeve and a prefabricated steel bar thread connection of a component;

FIG. 4 is an enlarged view of the point B in FIG. 3;

FIG. 5 is a schematic cross-sectional view illustrating another prefabricated structure in which a semi-grouting sleeve is coupled to reinforcing bars according to the present invention;

FIG. 6 is an enlarged view of a portion A of FIG. 5;

FIG. 7 is a cross-sectional view of a friction welded half-grout sleeve after turning a turned bead and welding a steel bar;

in the figure: 1. a semi-grouting sleeve; 101. a sleeve grouting section; 2. reinforcing steel bars; 3. connecting ends of semi-grouting sleeve steel bars; 301. an axial blind hole; 302. radial slurry discharge holes; 4. a grouting nozzle; 5. a slurry discharge nozzle; 6. an annular projection; 7. a first outer curl; 8. a first internal bead; 9. a second outer curl; 10. a third outer curl; 11. a threaded sleeve; 12. and (4) threaded reinforcing steel bars.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The first embodiment is as follows:

as shown in fig. 1 and 2, a prefabrication process method for connecting a half grouting sleeve and a steel bar includes the half grouting sleeve and the steel bar, and the half grouting sleeve and the steel bar are fused into a whole by adopting a friction welding process.

The reinforcing steel bars and the semi-grouting sleeves are prefabricated parts. Friction welding the ends of the welded steel bars to form an external curl; the outer curled edges are reserved or turned into flat outer peripheral surfaces.

The friction welding is applied to the connection between the semi-grouting sleeve and the steel bar, the end part of the steel bar does not need to be machined into threads, and the machining cost is saved.

Furthermore, half grout sleeve with the tip of reinforcing bar connection is sealed and do not have the internal and external screw thread setting, half grout sleeve is overall structure.

Specifically, the half grout sleeve is close to the tip of reinforcing bar connection is equipped with the axial blind hole, the axial blind hole is connected with radial row's thick liquid hole, radial row's thick liquid hole is connected with the mud discharging mouth.

Example two:

as shown in fig. 5 and 6, in a prefabrication process method for connecting a semi-grouting sleeve and a steel bar, the semi-grouting sleeve and the steel bar 2 are fused into a whole through a friction welding process; half grout sleeve includes interconnect's sleeve grout section 101 and half grout sleeve steel bar connection end 3, the open end of half grout sleeve steel bar connection end 3 with the open end friction welding fusion connection of sleeve grout section 101, the blind end of half grout sleeve steel bar connection end 3 with the tip friction welding fusion connection of reinforcing bar 2.

This half grout sleeve and steel bar connection's prefabrication process is through friction welding's application, at reinforcing bar 2 and half grout sleeve's welding process, need not to weld material, no welding seam is filled, has practiced thrift raw and other materials cost, and welding convenient and fast moreover, welding speed is fast, and the site operation is efficient. No spark, gas or waste residue is generated in the welding process, the energy is saved, the environment is protected, and the required energy is low.

The reinforcing steel bar 2 and the end part of the semi-grouting sleeve do not need to be threaded, and machining cost is saved. Compared with the traditional threaded connection, the torque wrench is not needed, and the connection quality cannot be influenced due to the damaged or screwed threads; compared with the traditional threaded connection, the connection failure caused by the fact that the thread pair is damaged due to too large tightening torque can be avoided, and parts are wasted.

The welding seam after friction welding has high quality, and the problems of conventional welding seam defects, such as incomplete penetration, incomplete fusion, cracks, air holes, slag inclusion and the like, can not occur. The firmness of the semi-grouting sleeve steel bar connecting end 3 is superior to that of conventional welding and threaded connection.

The friction welding process can realize high-quality welding of different materials, is beneficial to the optimized combination of the materials of the sleeve grouting section 101 and the semi-grouting sleeve steel bar connecting end 3, reduces the material cost, and simultaneously realizes the combination of exerting the maximum effect of the mechanical properties of different materials.

That is to say this half telescopic major component of grout sleeve grout section 101 with half grout sleeve steel bar connection end 3 can independent batch production preparation respectively, then carries out friction weld welded connection as required and be in the same place, can improve batch production's efficiency like this, has also simplified current telescopic production and processing degree of difficulty, and subsequent 2 connections of reinforcing bar are also very convenient, and the steadiness is also higher than current connected mode.

Further, half grout sleeve steel bar connection end 3 is equipped with axial blind hole 301 and radial row's thick liquid hole 302, axial blind hole 301 with radial row's thick liquid hole 302 mutually perpendicular and link up the setting, radial row's thick liquid hole 302 department is provided with row's thick liquid mouth 5.

Furthermore, the inner circumference of the axial blind hole 301 is provided without threads, and the inner diameter of the axial blind hole 301 is smaller than that of the sleeve grouting section 101, so that the size of the annular end face of the semi-grouting sleeve steel bar connecting end 3 is larger than that of the annular end face of the sleeve grouting section 101, and butt joint of friction welding is facilitated; the slurry discharging nozzle 5 is fixedly sleeved in the radial slurry discharging hole 302, and the depth extending into the radial slurry discharging hole 302 is not more than the hole depth of the radial slurry discharging hole 302, so that the influence of the too deep insertion on the flow of subsequent slurry is avoided.

An axial blind hole 301 and a radial grout discharging hole 302 without threads are formed in the connecting end 3 of the semi-grouting sleeve steel bar, so that the method is simple and simplifies the processing procedure; the axial blind hole 301 is communicated with the sleeve grouting section 101, and the radial grout outlet hole 302 is used for connecting the grout outlet nozzle 5, so that the grout in the sleeve grouting section 101 can be discharged from the grout outlet nozzle 5; the sleeve grouting section 101 is not provided with a grout outlet, so that the integrity of the sleeve grouting section 101 is better, and the strength is higher.

Furthermore, the outer circumference of the steel bar connecting end 3 of the semi-grouting sleeve, the inner circumference and the outer circumference of the sleeve grouting section 101 and the end part of the steel bar 2 are also in thread-free arrangement.

Such half grout sleeve rebar connecting end 3's raw materials easily acquire, and raw and other materials are with low costs, and the amount of processing in later stage is also not big, and the outer circumference need not too much to decorate and the structural change.

Further, a grouting nozzle 4 is connected to the outer circumference of one end of the sleeve grouting section 101, which is far away from the semi-grouting sleeve steel bar connection end 3. The grouting nozzle 4 is arranged on the sleeve grouting section 101, so that the grouting sleeve is simpler than the traditional grouting sleeve, and the forming and processing difficulty is reduced.

Further, during friction welding, the annular end face of the sleeve grouting section 101 directly abuts against the end face of the semi-grouting sleeve steel bar connecting end 3, and the end portion of the steel bar 2 directly abuts against the middle position of the other end face of the semi-grouting sleeve steel bar connecting end 3.

Further, sleeve grout section 101, half grout sleeve rebar connecting end 3 with the axis of reinforcing bar 2 all is on same axis.

The arrangement can ensure that the three parts are positioned on the same axis, and is favorable for keeping the stability and the coaxiality of connection; the end face is directly butted with the end face, a clamping structure is not needed, and the butt joint is simpler.

Further, the annular end part of the sleeve grouting section 101 of the friction welding fusion connection is provided with a first inner turned edge 8 and a first outer turned edge 7, the periphery of the end face of the steel bar connecting end 3 of the half grouting sleeve is provided with a second outer turned edge 9, and the end part of the steel bar 2 fusion connection forms a third outer turned edge 10; the first external bead 7 and the second external bead 9 are oppositely arranged, and the first external bead 7, the second external bead 9 and the third external bead 10 can be left in place.

Further, a plurality of annular protrusions 6 are arranged on the peripheral wall of the sleeve grouting section 101, and the sleeve grouting section 101 is formed in a rolling mode.

Example three:

as shown in fig. 7, the outside curl formed by friction welding is cut in this embodiment. After the first external turned edge 7 and the second external turned edge 9 are cut, the appearance of the joint of the semi-grouting sleeve steel bar connecting end 3 and the sleeve grouting section 101 is more attractive, the outer diameters of the semi-grouting sleeve steel bar connecting end and the sleeve grouting section are basically consistent, and the semi-grouting sleeve steel bar connecting end and the sleeve grouting section are convenient to use.

Example four:

the present embodiment provides a welding process.

The implementation method comprises the following steps: fix reinforcing bar 2, half grout sleeve 1 is rotatory, and the axis of reinforcing bar 2 and half grout sleeve 1's central line collineation, half grout sleeve 1's steel bar connection end and reinforcing bar friction fuse, and half grout sleeve 1 becomes an organic whole with reinforcing bar 2, accomplishes the prefabrication of half grout sleeve and reinforcing bar.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.