CN111118259B

CN111118259B - Base machining method

Info

Publication number: CN111118259B
Application number: CN201911399894.5A
Authority: CN
Inventors: 许顺良
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-12-07
Anticipated expiration: 2039-12-30
Also published as: CN111118259A

Abstract

The invention provides a base processing method, which comprises the following steps: quenching and tempering the fins of the blank piece to obtain a first intermediate with higher elasticity of the fins; and carrying out first surface treatment on the fin of the first intermediate body and obtaining a target workpiece with higher fin surface strength. According to the base processing method provided by the invention, the high-elasticity fin is obtained through quenching and tempering, and then the surface of the fin has higher strength through first surface treatment, so that the fin has higher elasticity and higher strength, the fin is ensured not to be easily damaged in the service process, and the service life of the base is prolonged.

Description

Base machining method

Technical Field

The invention relates to the technical field of buildings, in particular to a base machining method.

Background

In the technical field of buildings, in order to facilitate production and processing and reduce construction time, the length of a precast pile is ensured by adopting a mode of splicing reinforced concrete precast piles. In order to quickly and firmly join two prefabricated reinforced concrete piles, a quick butt joint mechanism is generally adopted to connect the reinforcing steel bars inside the two prefabricated reinforced concrete piles. But the strength of the quick butt joint assembly is not enough, so that the connection between the two pile bodies is not stable, and potential safety hazards exist.

Disclosure of Invention

In view of the above, there is a need for an improved method of machining a susceptor.

A base processing method is used for processing a base in a quick butt joint assembly, the base comprises a second fixing portion and a plurality of fins connected to the second fixing portion, and the fins are arranged in a surrounding mode to form an opening; the base machining method comprises the following steps:

quenching and tempering the fins of the blank piece to obtain a first intermediate with higher elasticity of the fins;

and carrying out first surface treatment on the fin of the first intermediate body and obtaining a target workpiece with higher fin surface strength.

According to the base processing method provided by the invention, the high-elasticity fin is obtained through quenching and tempering, and then the surface of the fin has higher strength through first surface treatment, so that the fin has higher elasticity and higher strength, the fin is ensured not to be easily damaged in the service process, and the service life of the base is prolonged.

In one embodiment of the present invention, the first surface treatment includes surface carburizing; the step of performing the first surface treatment on the fin of the first intermediate body and obtaining the target workpiece with higher fin surface strength comprises the following steps:

and performing surface carburization on the fin of the first intermediate body, and obtaining a target workpiece with higher fin surface strength.

Due to the arrangement, the surface carburization enables carbon atoms to permeate into the steel surface layer, the hardness and the wear resistance of the surface of the fin can be obviously improved, but the core part of the fin still keeps the high elasticity state, so that the fin has excellent elastic expansion capacity, elastic contraction capacity and bearing capacity.

Specifically, the surface carburizing process comprises the following steps: the method is characterized in that a fin of a first intermediate body is placed in an active carburizing medium, the medium is heated to a single-phase austenite region and then is subjected to heat preservation, active carbon atoms decomposed in the active carburizing medium permeate into the surface layer of the fin of the first intermediate body, the surface layer of the fin of the first intermediate body is made to obtain a high-carbon structure, and the core part still keeps the original components.

In one embodiment of the invention, the first surface treatment comprises surface quenching and low temperature tempering; the step of performing the first surface treatment on the fin of the first intermediate body and obtaining the target workpiece with higher fin surface strength comprises the following steps:

and performing surface quenching on the fin of the first intermediate, then performing low-temperature tempering, and obtaining a target workpiece with higher surface strength of the fin.

By the arrangement, the surface quenching can improve the hardness, the wear resistance and the fatigue strength of the surface of the fin in the first intermediate body, and the core still has higher elasticity; the low-temperature tempering can eliminate the stress generated by surface quenching, and avoid the deformation and cracking of the fins in the service process.

It is to be understood that the surface hardening may be one of induction heating surface hardening, flame heating surface hardening, electric contact heating surface hardening, electrolyte heating surface hardening.

In one embodiment of the present invention, the thermal refining includes surface quenching and high-temperature tempering; the step of performing thermal refining on the fins of the blank and obtaining a first intermediate body with higher fin elasticity comprises the following steps of:

and carrying out high-temperature quenching and high-temperature tempering on the fins of the blank to obtain a first intermediate with higher elasticity of the fins.

By the arrangement, the fin subjected to quenching and tempering has high strength and excellent elasticity, and is simple in processing technology and easy for batch production.

In one embodiment of the invention, the high temperature tempering temperature is 500-650 ℃; the step of performing high-temperature quenching and high-temperature tempering on the fins of the blank to obtain a first intermediate with higher fin elasticity comprises the following steps of:

and (3) carrying out high-temperature quenching on the fins of the blank piece, and then carrying out high-temperature tempering at the temperature of 500-650 ℃ to obtain a first intermediate with higher elasticity of the fins.

By the arrangement, the elasticity and the strength of the first intermediate obtained after high-temperature tempering are high.

In one embodiment of the present invention, before the step of subjecting the fins of the blank to thermal refining and obtaining the first intermediate body having higher fin elasticity, the method further includes the steps of:

and casting and molding the molten metal material in a mold to obtain a blank.

So set up, the blank processing technology of casting shaping is simple, and the blank shape of producing is accurate, has reduced the cutting output to the extensive low price of raw and other materials sources easily promotes production.

In one embodiment of the present invention, the step of subjecting the fins of the blank to thermal refining to obtain the first intermediate body having higher fin elasticity further includes the following steps:

and performing stress relief annealing on the first intermediate to obtain a second intermediate with smaller internal stress.

By the arrangement, the internal stress of the first intermediate body can be reduced, so that the tendency that the base deforms or even cracks in the service process is reduced, and the service life of the base is prolonged.

In one embodiment of the present invention, before the step of performing the first surface treatment on the fin of the first intermediate body and obtaining the target workpiece with higher fin surface strength, the method further includes the following steps:

and processing external threads on the second fixing part of the first intermediate body to obtain a third intermediate body with external threads.

By the arrangement, the second fixing part can be connected with an external part through threads, and the connection mode is simple and convenient; in addition, when the external thread is machined on the second fixing part, the surface of the first intermediate body is not treated after the modulation treatment, so that the surface of the second fixing part is relatively low in hardness during the machining of the external thread, the machining is convenient, and the abrasion of a tool for machining the external thread such as a lathe can be reduced.

In an embodiment of the present invention, before the step of performing thermal refining on the fins of the blank to obtain the first intermediate body having higher fin elasticity, the method further includes the following steps:

normalizing the fins of the blank to obtain a pre-intermediate with higher toughness.

By such arrangement, the normalizing treatment can refine the crystal grains of the steel, so that the pre-intermediate has higher strength, the cracking tendency of the base is reduced, and the comprehensive mechanical property is improved.

Specifically, the normalizing treatment comprises the steps of heating the steel member to a temperature 30-50 ℃ above the actual phase change temperature, and then keeping the temperature for a period of time, discharging the steel member out of the furnace and air cooling the steel member.

and carrying out second surface treatment on the second fixing part of the first intermediate body to obtain a target workpiece with higher strength.

So set up for the intensity of second fixed part is higher, and is not deformable in the base in-service process, and the length of service of extension base is long.

In one embodiment of the invention, the second surface treatment comprises surface quenching and low temperature tempering; the step of subjecting the second fixing portion of the first intermediate body to a second surface treatment and obtaining a target workpiece having a higher strength includes:

and performing surface quenching and low-temperature tempering on the second fixing part of the first intermediate to obtain a target workpiece with higher strength.

So set up, higher hardness, wear resistance and fatigue strength have been obtained to the second fixed part to its surface treatment is with low costs, easily realizes.

Drawings

FIG. 1 is a schematic structural view of a quick docking assembly according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the docking station shown in FIG. 1;

FIG. 3 is a schematic structural view of the base shown in FIG. 1;

FIG. 4 is a schematic view of a portion of the base shown in FIG. 1;

FIG. 5 is a cross-sectional view of a quick docking mechanism in one embodiment of the present invention;

fig. 6 is a cross-sectional view of a first pile, a reinforcement bar, a first embedded element, and an insert table according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a second pile, a reinforcement bar, a second embedded element, and a base according to an embodiment of the present invention;

FIG. 8 is a schematic view of the quick docking mechanism shown in FIG. 5 in use;

fig. 9 is a cross-sectional view of a precast pile in one embodiment of the present invention.

FIG. 10 is a schematic flow chart of a method for processing a susceptor according to the present invention.

100. A quick docking assembly; 10. inserting a platform; 20. a base; 11. a first fixed part; 12. a plug-in part; 13. an extension portion; 14. a step surface; 21. a second fixed part; 22. a fin; 221. an end face; 200. a quick docking mechanism; 210. a first pre-buried element; 211. an annular projection; 220. a second pre-embedded element; 300. prefabricating a pile; 301. a first pile body; 302. a second pile body; 310. reinforcing steel bars; 311. heading; 320. concrete; 330. and (6) sleeving the pile.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

The invention provides a base machining method which is used for machining a base in a quick butt joint assembly.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a quick docking assembly 100 according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of the docking station 10 shown in FIG. 1; FIG. 3 is a schematic structural view of the base 20 shown in FIG. 1; fig. 4 is a partial structural view of the base 20 shown in fig. 3.

In this embodiment, the quick docking assembly 100 is used to connect the reinforcing bars 310 in the precast pile 300. It is understood that in other embodiments, the quick docking assembly 100 may be used in other engineering fields, such as fabricated buildings, etc., and may also be used to connect the reinforcing bars 310 in other applications, such as pouring concrete, etc.

The quick docking assembly 100 comprises a docking station 10 and a base 20, the docking station 10 comprises a first fixing portion 11, a docking portion 12 and an extending portion 13 located between the first fixing portion 11 and the docking portion 12, the docking portion 12 is convexly arranged on the extending portion 13, and a step surface 14 is formed between the docking portion 12 and the extending portion 13; the base 20 includes a second fixing portion 21 and a plurality of fins 22 connected to the second fixing portion 21, and the plurality of fins 22 are disposed to surround each other; the insert table 10 can pass through the openings defined by the plurality of fins 22 by elastic expansion of the fins 22, the fins 22 can elastically contract and close the extension 13, and the end surfaces 221 of the fins 22 and the step surface 14 of the insert table 10 are disposed to face each other.

The socket 10 is a cylindrical component, the first fixing portion 11 is used for fixing with an external component, and the inserting portion 12 is used for inserting into the buckle. To facilitate plugging, the platform 10 is preferably generally cylindrical; in other embodiments, the platform 10 may have other shapes such as a square column and a tapered column. In order to increase the bearing capacity of the quick docking assembly 100, the platform 10 is made of a solid material. It is understood that in other embodiments, the platform 10 may be made of hollow material according to different bearing requirements.

The first fixing portion 11 is used for connecting with the first embedded element 210. In this embodiment, the outer peripheral wall of the first fixing portion 11 is provided with an external thread, and the inner peripheral wall of the first embedded element 210 is provided with an internal thread, which are fixedly connected by a thread. It is understood that in other embodiments, the first fixing portion 11 and the first embedded element 210 may be connected by other methods, such as welding, clamping, riveting, and the like.

The insertion part 12 can penetrate and abut against the end surface 221 of the base 20, the insertion part 12 can enable the base 20 to be elastically expanded when penetrating the base 20, and after the insertion part 12 penetrates through the base 20, the base 20 elastically contracts and encloses the extension part 13, so that the effect of limiting the circumferential movement of the insertion table 10 can be achieved.

The extending portion 13 is used for connecting the first fixing portion 11 and the inserting portion 12, and after the inserting portion 12 is inserted into the base 20, the extending portion 13 is enclosed and fixed by the base 20.

The base 20 is substantially hollow and cylindrical, and is fitted to the cradle 10. Preferably, the base 20 is substantially hollow cylindrical. It is understood that in other embodiments, the base 20 may be configured with the socket 10 in other shapes such as a square cylinder, a cone cylinder, etc.

The second fixing portion 21 is used for being connected with the second embedded element 220, in this embodiment, an outer circumferential wall of the second fixing portion 21 is provided with an external thread, an inner circumferential wall of the second embedded element 220 is provided with an internal thread, and the two are fixedly connected through the thread. It is understood that in other embodiments, the second fixing portion 21 and the second embedded element 220 may be connected by other methods such as welding, clamping, riveting, and the like.

The plurality of fins 22 are enclosed and form a hollow column shape, and a certain gap is formed between every two adjacent fins 22 for elastic expansion and elastic contraction of the fins 22; the fins 22 can be penetrated by the inserting part 12 through elastic expansion, and after the inserting part 12 penetrates through the fins 22, the fins 22 elastically contract and enclose the extension part 13 of the inserting table 10. Preferably, the plurality of fins 22 are circumferentially and uniformly arranged around the axis of the base 20 in order to balance the force applied to the plurality of fins 22.

In the present embodiment, the socket 10 and the base 20 are made of ferrous metal. Preferably, the socket 10 and the base 20 are made of carbon steel or alloy steel. Specifically, the platform 10 and the base 20 are made of carbon steel, chromium vanadium steel, chromium nickel steel, chromium molybdenum steel, chromium nickel molybdenum steel, chromium manganese silicon steel, ultra-high strength steel, or stainless steel. It is understood that other materials may be used in other embodiments.

The use process of the quick docking assembly 100 is as follows: extending the inserting part 12 and the extending part 13 of the inserting table 10 into the inner wall of the base 20 and moving along the inserting direction alpha, wherein the inserting part 12 of the inserting table 10 applies pressure on the fin 22, so that the fin 22 is elastically expanded until the inserting part 12 passes through the fin 22; when the fin 22 elastically contracts and closes the extension 13 at the moment when the socket 12 passes through the fin 22, and a force in the opposite direction of the insertion direction α is applied to the socket 10, the end of the fin 22 abuts against the step surface 14 between the socket 12 and the extension 13 to limit the socket 10.

The insertion direction α in the present invention is a direction in which the fixing portion is directed to the mating part 12, i.e., a direction of an arrow shown in fig. 1. It is understood that the insertion direction α may be, but is not limited to, the above-mentioned directions, and even a partial angular offset should be included in the scope of the present invention.

The quick butt joint assembly 100 is simple to install, after the inserting part 12 of the inserting table 10 is inserted into the base 20, the fins 22 can elastically contract and enclose the extending part 13 of the base 20, the end parts of the fins 22 abut against the step surface 14 of the inserting table 10, and the abutting surfaces between the end parts of the fins 22 and the step surface 14 of the inserting table 10 are approximately annular, so that the abutting area is large, the joint strength between the first embedded element 210 and the second embedded element 220 can be ensured, and particularly, the tensile property is greatly improved; the fins 22 not only can enclose the extension 13 of the insertion stage 10, but also can limit the extension 13 to prevent the extension 13 from shaking in the circumferential direction. In addition, the rapid docking assembly 100 provided by the invention is simple in processing technology, low in cost and wide in application scene.

Referring to fig. 5 to 9, fig. 5 is a cross-sectional view of a quick docking mechanism 200 according to an embodiment of the present invention; fig. 6 is a cross-sectional view of the first pile 301, the reinforcement bar 310, the first embedded element 210 and the platform 10 according to an embodiment of the present invention; fig. 7 is a cross-sectional view of the second pile 302, the reinforcement bar 310, the second fastener element 220 and the base 20 according to an embodiment of the present invention; FIG. 8 is a schematic view of the quick docking mechanism 200 shown in FIG. 5 in use; fig. 9 is a partially enlarged view of a portion a in fig. 8.

A fast docking mechanism 200 comprises a first pre-embedded element 210, a second pre-embedded element 220 and the fast docking assembly 100; the fixing part of the inserting table 10 is connected to the first pre-buried element 210, the base 20 is connected to the second pre-buried element 220, and one end of the steel bar 310 is connected to the first pre-buried element 210 or the second pre-buried element 220; the reinforcing steel bars 310 connected with the first embedded elements 210 and the reinforcing steel bars 310 connected with the second embedded elements 220 are connected through the quick butt joint assembly 100.

The quick butt joint mechanism 200 can quickly connect the first embedded element 210 and the second embedded element 220, so that the construction time is saved, and the connected first embedded element 210 and the connected second embedded element 220 are high in firmness and particularly good in tensile property.

In an embodiment of the present invention, the outer wall of the first embedded element 210 relatively close to one end of the steel bar 310 is a non-circular polygon; and/or the presence of a catalyst in the reaction mixture,

the outer wall of the second embedded element 220 close to one end of the steel bar 310 is a non-circular polygon.

Thus, the first embedded element 210 and the second embedded element 220 are convenient to install and fix.

In an embodiment of the present invention, the ends of the first fastener insert 210 or the second fastener insert 220 connected to the reinforcing bars 310 each have a constriction, and the ends of the reinforcing bars 310 connected to the first fastener insert 210 or the second fastener insert 220 have an upset 311, and the constrictions are used for limiting the upset 311 of the reinforcing bars 310.

So set up, it is simple and convenient to be connected between first pre-buried component 210 or second pre-buried component 220 and the reinforcing bar 310, and the engineering time is short, and the fastness of connection is high.

In one embodiment, the inner walls of the first fastener insert 210 or the second fastener insert 220 are tapered inwardly to form a tapered opening. It is understood that in other embodiments, both the inner wall and the outer wall of the first fastener insert 210 or the second fastener insert 220 may be shrunk inward to form a shrink opening.

In an embodiment of the present invention, the first fastener insert 210 or the second fastener insert 220 is threadedly connected to the reinforcing bar 310.

So set up, be provided with the screw thread on the reinforcing bar 310 and can increase the adhesive force between reinforcing bar 310 and the concrete 320 for combine closely between reinforcing bar 310 and the concrete 320, the two can coordinate the cooperation, bear external force jointly, increase precast pile 300's stress strength.

It is understood that other connection forms, such as welding, riveting, gluing, etc., may also be used between the first embedded element 210 and the platform 10 and between the second embedded element 220 and the base 20.

The use process of the quick docking mechanism 200 is as follows: the first embedded element 210 is installed at the end of the steel bar 310 in the first pile body 301 through a shrink-fit or threaded connection in a factory or a construction site, and the second embedded element 220 is installed at the end of the steel bar 310 in the second pile body 302 through a shrink-fit or threaded connection. Installing the inserting table 10 on the first embedded element 210 and the base 20 on the second embedded element 220 in a construction site; burying the second pile 302 underground, keeping the second pre-buried element 220 above the horizontal plane (generally, the height of the part of the second pile 302 above the horizontal plane is about 1 m), coating a glue coating (not shown) on the surface of the second pile 302, and making the glue coating flow into the inner cavity of the second pre-buried element 220; the first pile body 301 is spliced with the second pile body 302 through a crane or other modes, during splicing, the axes of the first embedded element 210 and the second embedded element 220 are approximately aligned, pressure is applied to the first embedded element, so that the inserting platform 10 is inserted into the base 20 (the butt joint process of the quick butt joint assembly 100 can be completed only by the weight of the first precast pile per se on part of construction sites, external force does not need to be applied), and when the inserting part 12 of the inserting platform 10 penetrates through the base 20, sound is generated, so that the installation completion can be judged. Most of the glue coating layers are extruded between the first embedded element 210 and the second embedded element 220, between the base 20 and the second embedded element 220, between the inserting table 10 and the second embedded element 220, and between the inserting table 10 and the base 20 in the installation process, and a small part of the glue coating layers are extruded between the inserting table 10 and the first embedded element 210. It will be appreciated that, because there are typically multiple rebars 310 in the precast pile 300, it is necessary to simultaneously dock the quick docking mechanisms 200 on multiple rebars 310.

In one embodiment, the inserting table 10 is connected with the first embedded element 210 by a thread; and/or, the base 20 is connected with the second embedded element 220 by a screw thread.

In one embodiment, for convenience of processing, the first embedded element 210 or the second embedded element 220 may be directly provided with through threads, one end of which is used for connecting the reinforcing bars 310, and the other end of which is used for connecting the quick docking assembly 100.

It is understood that in other embodiments, other connection methods, such as snap connection, welding, riveting, etc., may be adopted between the socket 10 and the first fastener element 210, and between the base 20 and the second fastener element 220.

In one embodiment, an annular protrusion 211 is disposed at one end of the first embedded element 210 and/or the second embedded element 220 connected to the quick connection assembly.

So set up, annular lug 211 can homogenize prestressing force for the prestressing force that the steel reinforcement cage can bear when prestretching is carried out is bigger, prevents that first embedded component 210 or second embedded component 220 from damaging.

In one embodiment, the outer diameter of the annular protrusion 211 gradually decreases from the end of the first fastener element 210 and/or the second fastener element 220 to the middle.

With such an arrangement, the annular bump 211 can further homogenize the prestress, and the phenomenon of abrupt change of the angle of the outer wall surface (such as two mutually perpendicular surfaces) does not exist, so that the prestress loss can be prevented.

It is understood that in other embodiments, the annular protrusion 211 with other shapes, such as rectangular or trapezoidal annular protrusion 211 with a cross section in the axial direction, may be used.

Preferably, the outer peripheral wall of the annular protrusion 211 is a curved surface. It is understood that in other embodiments, the outer peripheral wall of the annular protrusion 211 may have other shapes such as a slope.

So set up, can further reduce the loss of stress, and have excellent homogeneous prestress effect.

It should be noted that the first embedded element 210 and the second embedded element 220 may be of the same type or different types, and may be selected according to a working condition.

Referring to fig. 10, fig. 10 is a cross-sectional view of a precast pile 300 according to an embodiment of the present invention.

The precast pile 300 is manufactured by arranging the steel bars 310 according to the stress requirement after forming to form a steel bar cage, pre-stretching the steel bar cage to generate prestress to offset or reduce the tensile stress generated by external load, so that no crack is generated or the time for generating the crack is prolonged under the condition of normal use of the steel bars 310; the reinforcement cage is placed into a mold after being formed, then concrete 320 is poured into the mold, a centrifugal mode is started if a hollow precast pile 300 needs to be made, the precast pile is placed in the mold in a standing mode if an entity pile needs to be made, and the precast pile 300 is formed after drying and demolding after being formed. The pile manufacturing method is simple, and the manufactured precast pile 300 is high in strength, flexible in construction site and low in cost.

The precast pile 300 is connected by opposing the reinforcing bars 310 connected to the first pre-embedded elements 210 to the reinforcing bars 310 connected to the second pre-embedded elements 220 and using the quick coupling assembly 100 when connecting two precast piles 300.

Preferably, the steel bar 310 is a steel bar for prestressed concrete 320. The PC steel bar has the advantages of high strength and toughness, low looseness, strong bond force with the concrete 320, good weldability and upsetting property, material saving and the like.

It is understood that in other embodiments, other types of rebar 310 are possible, such as stainless steel rods, hot rolled steel rods, medium strength pre-stressed wires, stress-relief wires, steel strands, pre-stressed threaded rebar, and the like.

In an embodiment of the present invention, the reinforcing bars 310, the first embedded element 210 and the second embedded element 220 are embedded in the concrete 320 in advance to form embedded elements.

It is understood that in other embodiments, the reinforcing bars 310, the first fastener element 210 and the second fastener element 220 can be driven into the concrete 320 to become fastener elements, and the reinforcing bars 310 are driven into the concrete 320 first, and then the first fastener element 210 or the second fastener element 220 is connected to the end of the reinforcing bars 310.

In one embodiment of the present invention, the precast pile 300 is a hollow tubular pile.

It is understood that in other embodiments, the precast pile 300 may also be a hollow square pile, a solid tubular pile, a solid square pile, a solid pointed pile or other special-shaped piles.

In one embodiment, the reinforcement cage is subjected to a tensioning step and a relaxation step. The tensioning step is to apply prestress to the reinforcement cage in advance so that the reinforcement cage bears compressive stress and further generates certain deformation to improve the load which can be borne by the reinforcement cage, wherein the load comprises the self weight of a component, wind load, snow load, earthquake load action and the like; because the prestress applied in the tensioning step is larger, in order to reduce the prestress loss of the reinforcement cage, the tensioning step is required.

In one embodiment, after the first pile body 301 and the second pile body 302 are butted, a pile hoop 330 is arranged on the peripheral wall of the precast pile 300 after the butting is completed, and the pile hoop 330 is used for fastening the butted part of the first pile body 301 and the second pile body 302 to prevent the first pile body 301 and the second pile body 302 from being misplaced in service.

The quick butt joint mechanism 200 provided by the invention has the advantages that only one end of the steel bar 310 is connected with the first embedded element 210 or the second embedded element 220, the two steel bars 310 can be connected through the quick butt joint component 100, the connection is simple and convenient, the joint strength is high, and particularly, the tensile property is excellent.

Referring to fig. 10, fig. 10 is a flow chart illustrating a method for processing the base 20 according to the present invention.

The invention provides a base 20 processing method, which is used for processing a base 20 in a quick docking assembly 100, and the base 20 processing method comprises the following steps:

s1, carrying out thermal refining on the fins 22 of the blank to obtain a first intermediate body with higher elasticity of the fins 22;

and S2, performing first surface treatment on the fin 22 of the first intermediate body to obtain a target workpiece with higher surface strength of the fin 22.

In the processing method of the base 20 provided by the invention, the high-elasticity fins 22 are obtained through quenching and tempering treatment, and then the surface of the fins 22 has higher strength through first surface treatment, so that the fins 22 have higher elasticity and higher strength, the fins 22 are ensured not to be easily damaged in the service process, and the service life of the base 20 is prolonged.

In one embodiment of the present invention, the first surface treatment includes surface carburizing; the step of subjecting the fin 22 of the first intermediate body to the first surface treatment and obtaining the target workpiece having the fin 22 with higher surface strength includes:

and S2-1, performing surface carburization on the fin 22 of the first intermediate body, and obtaining a target workpiece with higher surface strength of the fin 22.

With such an arrangement, the surface carburization causes carbon atoms to permeate into the steel surface layer, so that the hardness and the wear resistance of the surface of the fin 22 can be remarkably improved, but the core part of the fin 22 still keeps the high elasticity state, so that the fin 22 has excellent elastic expansion capability, elastic shrinkage capability and force bearing capability.

Specifically, the surface carburizing process comprises the following steps: the fins 22 of the first intermediate body are placed in an active carburizing medium, heated to a single-phase austenite region and then insulated, so that active carbon atoms decomposed in the active carburizing medium permeate into the surface layer of the fins 22 of the first intermediate body, the surface layer of the fins 22 of the first intermediate body is in a high carbon structure, and the core part still keeps the original components.

At this time, the base 20 processing method includes the steps of:

In one embodiment of the invention, the first surface treatment comprises surface quenching and low temperature tempering; the step of subjecting the fin 22 of the first intermediate body to the first surface treatment and obtaining the target workpiece having the fin 22 with higher surface strength includes:

and S2-2, performing surface quenching on the fin 22 of the first intermediate, and then performing low-temperature tempering, and obtaining a target workpiece with higher surface strength of the fin 22.

With such an arrangement, the surface quenching can improve the hardness, wear resistance and fatigue strength of the surface of the fin 22 in the first intermediate body, while the core still has high elasticity; the low temperature tempering can eliminate the stress generated by the surface quenching and avoid the deformation and cracking of the fins 22 in the service process.

At this time, the base 20 processing method includes the steps of:

In one embodiment of the present invention, the thermal refining includes surface quenching and high-temperature tempering; the step of subjecting the fins 22 of the blank to thermal refining and obtaining a first intermediate body having higher elasticity of the fins 22 includes:

s1-1, carrying out high-temperature quenching and high-temperature tempering on the fins 22 of the blank to obtain a first intermediate body with higher elasticity of the fins 22.

With the arrangement, the fin 22 subjected to thermal refining has high strength and excellent elasticity, and is simple in processing technology and easy for mass production.

At this time, the base 20 processing method includes the steps of:

s1-1, carrying out high-temperature quenching and high-temperature tempering on the fins 22 of the blank to obtain a first intermediate body with higher elasticity of the fins 22; and S2-1, performing surface carburization on the fin 22 of the first intermediate body, and obtaining a target workpiece with higher surface strength of the fin 22.

Alternatively, the first and second electrodes may be,

s1-1, carrying out high-temperature quenching and high-temperature tempering on the fins 22 of the blank to obtain a first intermediate body with higher elasticity of the fins 22; and S2-2, performing surface quenching on the fin 22 of the first intermediate, and then performing low-temperature tempering, and obtaining a target workpiece with higher surface strength of the fin 22.

In one embodiment of the present invention, in the step S1-1, the temperature of the high temperature tempering is 500 to 650 ℃.

In an embodiment of the present invention, before the thermal refining of the fin 22 of the blank and obtaining the first intermediate body with higher elasticity of the fin 22, the method further includes the following steps:

and S0, casting and molding the molten metal material in the mold to obtain a blank.

At this time, the base 20 processing method includes the steps of:

s0, casting and molding the molten metal material in a mold to obtain a blank piece;

Alternatively, the first and second electrodes may be,

In an embodiment of the present invention, before the step of performing the first surface treatment on the fin 22 of the first intermediate body and obtaining the target workpiece with higher surface strength of the fin 22, the method further includes the following steps:

p2, performing external thread machining on the second fixing part 21 of the first intermediate body to obtain a third intermediate body with external threads.

With the arrangement, the second fixing part 21 can be connected with an external part through threads, and the connection mode is simple and convenient; further, since the first intermediate body is not subjected to surface treatment after the preparation treatment when the male screw is machined in the second fixing portion 21, the surface of the second fixing portion 21 is relatively low in hardness when the male screw is machined, which facilitates machining and reduces wear of a tool for machining the male screw such as a lathe.

At this time, the base 20 processing method includes the steps of:

s1-1, carrying out high-temperature quenching and high-temperature tempering on the fins 22 of the blank to obtain a first intermediate body with higher elasticity of the fins 22;

p1, performing stress relief annealing on the first intermediate to obtain a second intermediate with smaller internal stress;

p2, processing external threads on the second fixing part 21 of the second intermediate body to obtain a third intermediate body with external threads;

and S2-1, performing surface carburization on the fin 22 of the third intermediate body, and obtaining a target workpiece with higher surface strength of the fin 22.

Alternatively, the first and second electrodes may be,

and S2-2, performing surface quenching on the fin 22 of the third intermediate, and then performing low-temperature tempering, and obtaining a target workpiece with higher surface strength of the fin 22.

In an embodiment of the present invention, before the step of performing thermal refining on the fin 22 of the blank to obtain the first intermediate body having the higher elasticity of the fin 22, the method further includes the following steps:

p0, normalizing the fins 22 of the blank and obtaining a pre-intermediate with higher toughness of the fins 22.

By such arrangement, the normalizing treatment can refine the crystal grains of the steel, so that the pre-intermediate has higher strength, the cracking tendency of the base 20 is reduced, and the comprehensive mechanical property is improved.

At this time, the base 20 processing method includes the steps of:

p0, normalizing the fins 22 of the blank to obtain a pre-intermediate body with higher toughness of the fins 22;

s1-1, carrying out high-temperature quenching on the fins 22 of the pre-intermediate and then carrying out high-temperature tempering to obtain a first intermediate with higher elasticity of the fins 22;

Alternatively, the first and second electrodes may be,

p0, normalizing the fin 22 of the pre-intermediate to obtain a pre-intermediate with higher toughness of the fin 22;

In an embodiment of the present invention, after the step of subjecting the fin 22 of the blank to thermal refining to obtain the first intermediate body having the higher elasticity of the fin 22, the method further includes the steps of:

and S3, performing second surface treatment on the second fixing part 21 of the first intermediate body to obtain a target workpiece with higher strength.

By such arrangement, the strength of the second fixing part 21 is higher, the second fixing part is not easy to deform in the service process of the base 20, and the service time of the base 20 is prolonged.

At this time, the base 20 processing method includes the steps of:

s2-1, carburizing the surface of the fin 22 of the third intermediate;

and S3, performing second surface treatment on the second fixing part 21 of the third intermediate body to obtain a target workpiece with higher surface strength of the fin 22.

Alternatively, the first and second electrodes may be,

s2-2, performing surface quenching on the fins 22 of the third intermediate, and then performing low-temperature tempering;

In one embodiment of the invention, the second surface treatment comprises surface quenching and low temperature tempering; the step of subjecting the second fixing portion 21 of the first intermediate body to the second surface treatment and obtaining the target workpiece higher in strength includes:

s3-1, performing surface quenching and low-temperature tempering on the second fixing part 21 of the first intermediate body to obtain a target workpiece with higher strength.

With this arrangement, the second fixing portion 21 obtains higher hardness, wear resistance, and fatigue strength, and the surface treatment thereof is low in cost and easy to implement.

At this time, the base 20 processing method includes the steps of:

s2-1, carburizing the surface of the fin 22 of the third intermediate;

and S3-1, performing surface quenching on the second fixing part 21 of the third intermediate body, and then performing low-temperature tempering to obtain a target workpiece with higher surface strength of the fin 22.

Alternatively, the first and second electrodes may be,

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims

1. A base processing method is used for processing a base in a quick butt joint assembly, the base comprises a second fixing portion and a plurality of fins connected to the second fixing portion, and the fins are arranged in a surrounding mode to form an opening; the base machining method comprises the following steps:

performing stress relief annealing on the first intermediate to obtain a second intermediate with smaller internal stress;

performing first surface treatment on the fins of the second intermediate to improve the surface strength of the fins;

and carrying out second surface treatment on the second fixing part of the second intermediate body to obtain a target workpiece with higher strength.

2. The method of machining a base according to claim 1, wherein the first surface treatment includes surface carburizing; the step of subjecting the fins of the second intermediate body to a first surface treatment and making the surface strength of the fins higher includes:

performing surface carburization on the fin of the second intermediate, and obtaining a target workpiece with higher surface strength of the fin;

alternatively, the first and second electrodes may be,

the first surface treatment comprises surface quenching and low-temperature tempering; the step of subjecting the fins of the second intermediate body to a first surface treatment and making the surface strength of the fins higher includes:

and performing surface quenching on the fins of the second intermediate, and then performing low-temperature tempering, and obtaining a target workpiece with higher surface strength of the fins.

3. The susceptor processing method according to claim 2, wherein the surface hardening is one of induction heating surface hardening, flame heating surface hardening, electric contact heating surface hardening, and electrolyte heating surface hardening.

4. The susceptor processing method according to claim 1, wherein the thermal refining includes surface quenching and high-temperature tempering; the step of performing thermal refining on the fins of the blank and obtaining a first intermediate body with higher fin elasticity comprises the following steps of:

5. The susceptor processing method according to claim 4, wherein the high temperature tempering temperature is 500 ℃ to 650 ℃; the step of performing high-temperature quenching and high-temperature tempering on the fins of the blank to obtain a first intermediate with higher fin elasticity comprises the following steps of:

6. The base processing method according to claim 1, wherein before the step of subjecting the fins of the blank to thermal refining and obtaining the first intermediate body having higher elasticity of the fins, the method further comprises the steps of:

and casting and molding the molten metal material in a mold to obtain a blank.

7. The base processing method according to claim 1, wherein before the step of subjecting the fins of the second intermediate body to the first surface treatment to make the surface strength of the fins higher, the method further comprises the steps of:

and processing external threads on the second fixing part of the second intermediate body to obtain a third intermediate body with external threads.

8. The base processing method according to claim 1, wherein before the step of quenching and tempering the fins of the blank member to obtain the first intermediate body having higher elasticity of the fins, the method further comprises the steps of:

9. The susceptor processing method of claim 8, wherein the normalizing step comprises: the fins of the blank are heated to 30 to 50 ℃ above the actual temperature of the phase change.

10. The susceptor processing method according to claim 1, wherein the second surface treatment includes surface quenching and low-temperature tempering; the step of subjecting the second fixing portion of the second intermediate body to a second surface treatment and obtaining a target workpiece higher in strength includes:

and performing surface quenching and low-temperature tempering on the second fixing part of the second intermediate to obtain a target workpiece with higher strength.