CN115647571A - Cast-weld rivet composite connection method and connection structure of T-shaped joint - Google Patents
Cast-weld rivet composite connection method and connection structure of T-shaped joint Download PDFInfo
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- CN115647571A CN115647571A CN202211674758.4A CN202211674758A CN115647571A CN 115647571 A CN115647571 A CN 115647571A CN 202211674758 A CN202211674758 A CN 202211674758A CN 115647571 A CN115647571 A CN 115647571A
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Abstract
The invention provides a cast-weld rivet composite connecting method and a connecting structure of a T-shaped joint. The method comprises the following steps: processing an embedded groove on the plate surface of the first connecting plate; processing a connector matched with the embedding groove on the end face of the second connecting plate; respectively coating high self-propagating heat release coatings on the surfaces of the connector and the embedding groove in a bonding mode, wherein the self-propagating heat release coatings are mixtures of thermite and adhesives; after the self-propagating exothermic paint is dried, the connector is clamped into the embedding groove, and casting liquid is injected into a gap formed between the connector and the embedding groove, so that the self-propagating exothermic paint performs a self-propagating reaction, the surfaces of the connector and the embedding groove are further melted, and the second connecting plate is in metallurgical connection with the first connecting plate in a cast-weld rivet composite mode. Compared with the conventional electric welding method for the T-shaped joint, the connecting method and the connecting structure provided by the invention can improve the joint bonding strength, improve the working efficiency and reduce the welding processing cost.
Description
Technical Field
The application belongs to the technical field of cast welding, and particularly relates to a cast welding and riveting composite connection method and a connection structure of a T-shaped joint.
Background
The T-shaped joint is a joint formed by two steel plates connected in a perpendicular manner, and the shape of the joint is similar to the letter "T", so that the joint is called a "T-shaped joint". In the prior art, the T-shaped joints of the super-thick steel plates are usually welded by electric welding, and in the process of electric welding, grooves need to be machined on two sides of the end portions of the steel plates firstly, and then a welding gun is used for realizing the connection of the two super-thick steel plates in the T-shaped joints by multi-layer welding. The welding process is complicated, the welding quality control difficulty is high, the welding seam strength is low, and the requirements of high efficiency and high quality of the current welding process cannot be met.
Disclosure of Invention
Based on the method, the application provides a cast-weld-rivet composite connecting method and a connecting structure of the T-shaped joint.
In a first aspect of the embodiments of the present invention, a cast-weld-rivet composite connection method for a T-shaped joint is provided, including:
processing an embedded groove on the plate surface of the first connecting plate;
processing a connector matched with the embedding groove on the end face of the second connecting plate; the size of the connector is smaller than that of the embedding groove;
and respectively coating high self-propagating heat release paint on the surfaces of the connector and the embedding groove. After drying, clamping the connector into the embedding groove, injecting high-temperature casting liquid such as molten steel, molten iron and the like into a gap formed between the connector and the embedding groove, enabling the adhesive coating to perform a self-propagating reaction, melting the surfaces of the connector and the embedding groove, and enabling the second connecting plate to be in metallurgical connection with the first connecting plate in a cast-weld rivet composite mode;
the embedded groove is provided with a limiting section, and the limiting section is used for limiting the connector to be separated from the embedded groove.
Optionally, an orthographic projection of the stopper section on a groove bottom of the fitting groove is covered by the groove bottom.
Optionally, an orthographic projection of the notch of the fitting groove on the groove bottom is covered by an orthographic projection of the limiting section on the groove bottom of the fitting groove.
Optionally, before the step of locking the connection head into the fitting groove, the method further includes:
and paving an iron pad layer at the bottom of the embedding groove, so that after the connector is clamped into the embedding groove, the distance between the bottom surface of the connector and the bottom surface of the embedding groove is 10mm to 20mm.
Optionally, before the step of injecting the casting liquid into the gap formed between the connection head and the fitting groove, the method further includes:
and connecting the second connecting plate with the first connecting plate through a position fixing piece so as to ensure that the connecting head and the embedding groove keep relatively static in the injection process of the casting liquid.
Optionally, the plate surface of the first connecting plate includes mold fixing surfaces respectively connected to two sides of the notch of the fitting groove, and after the connector is fitted into the fitting groove and before the step of injecting the casting liquid into the gap formed between the connector and the fitting groove, the method further includes:
respectively fixing a casting steel mould on each mould fixing surface by adopting box sealing mud so as to form a pouring gate between the casting steel mould and the second fishplate plate surface;
blocking openings at two ends of the embedding groove by using the box sealing mud so as to prevent the casting liquid from flowing out in the process of injecting the casting liquid into the gap;
the to the connector with pour into casting liquid in the clearance that forms between the gomphosis groove, include:
and injecting the casting liquid into a gap between the connector and the surface of the embedding groove through the pouring gate.
Optionally, after the connector is snapped into the fitting groove, a casting liquid is injected into a gap formed between the connector and the fitting groove, and the method includes:
when the tabling groove and the connector are heated to the target temperature, the connector is clamped into the tabling groove and is kept warm for the first time, so that the integral temperature of the tabling groove and the connector is balanced;
and at the end of the first time, pouring casting liquid into a gap formed between the connector and the embedding groove.
Optionally, the casting liquid is molten steel smelted by a steel furnace or molten iron smelted by an iron furnace, and the chemical composition of the casting liquid is the same as that of the first connecting plate and/or the second connecting plate.
Optionally, after the step of injecting the casting liquid into the gap formed between the connection head and the fitting groove, the method further includes:
and after the casting liquid is solidified, removing the casting liquid higher than the plate surface of the first connecting plate, and keeping the temperature of the connector and the embedding groove for a second time so as to reduce the temperature reduction speed of the connector and the embedding groove.
In a second aspect of the embodiments of the present invention, there is provided a cast-weld-rivet composite connection structure of a T-shaped joint, including:
the connecting device comprises a first connecting plate and a second connecting plate, wherein the plate surface of the first connecting plate is provided with an embedding groove, and the end surface of the second connecting plate is provided with a connector which is matched with the embedding groove to be connected with the first connecting plate;
the size of the connector is smaller than that of the embedding groove, and casting liquid is injected into a gap formed between the connector and the embedding groove.
The invention provides a cast-weld method and a connection structure of a T-shaped joint, wherein the method comprises the following steps: processing an embedded groove on the plate surface of the first connecting plate; processing a connector matched with the embedding groove on the end face of the second connecting plate; the size of the connector is smaller than that of the tabling groove; respectively coating a high self-propagating heat release coating on the surfaces of the connector and the embedding groove in a sticking way, wherein the self-propagating heat release coating is a mixture of a thermite and an adhesive; after the self-propagating exothermic paint is dried, clamping the connector into the embedding groove, and injecting casting liquid into a gap formed between the connector and the embedding groove so that the self-propagating exothermic paint performs a self-propagating reaction, and further melting the surface of the connector and the surface of the embedding groove, so that the second connecting plate is in metallurgical connection with the first connecting plate in a cast-weld rivet compound mode; the embedded groove is provided with a limiting section, and the limiting section is used for limiting the connector to be separated from the embedded groove.
According to the invention, the first connecting plate and the second connecting plate are connected by processing the embedding groove on the plate surface of the first connecting plate and processing the connector matched with the embedding groove on the end surface of the second connecting plate, and meanwhile, the casting liquid is injected into the gap between the embedding groove and the connector by combining a cast welding and riveting composite method, so that the first connecting plate and the second connecting plate are fixed, and finally, the T-shaped connector is quickly welded. In the process, the traditional T-shaped joint connecting method is changed, the connecting process is shortened, meanwhile, the connecting strength of the first connecting plate and the second connecting plate is ensured through the mutual embedding of the embedding groove and the connecting heads, and the welding method is efficient and high in quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of a T-shaped connection structure provided by an embodiment of the present invention;
FIG. 2 is a step diagram of a T-joint cast-weld-rivet composite connection method according to an embodiment of the present invention;
FIG. 3 is a step diagram of another method for cast-on-rivet composite attachment of T-joints according to an embodiment of the present invention;
FIG. 4 is a schematic view of a T-joint cast-weld scenario provided by an embodiment of the present invention;
FIG. 5 is a schematic structural view of a first connecting plate with a dovetail-shaped fitting groove according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second connecting plate with a dovetail connector according to an embodiment of the present invention.
Reference numerals:
1-a first connecting plate, 2-a second connecting plate, 3-an embedding groove, 4-a connector, 5-a sizing block, 6-a casting steel mold, 7-a pouring cup and 8-a casting liquid.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. 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 application.
Fig. 1 shows a schematic view of a T-shaped connection structure, which specifically comprises:
the connecting structure comprises a first connecting plate 1 and a second connecting plate 2, wherein the plate surface of the first connecting plate 1 is provided with an embedded groove 3, and the end surface of the second connecting plate 2 is provided with a connector 4 which is matched with the embedded groove 3 to be connected with the first connecting plate 1; wherein, the size of the connector 4 is smaller than that of the tabling groove 3; the casting liquid 8 is poured into the gap formed between the connector 4 and the fitting groove 3.
The T-shaped connection structure shown in fig. 1 can be obtained by a T-shaped joint cast-weld-rivet composite connection method provided in an embodiment of the present invention, which specifically includes the following steps:
in a first aspect of the present invention, an embodiment is provided, and fig. 2 shows a step diagram of a T-joint cast-weld-rivet composite connection method, as shown in fig. 2, the method specifically includes:
step S101, processing a fitting groove 3 on a plate surface of the first connecting plate 1, wherein the fitting groove 3 has a limiting section, and the limiting section is used for limiting the connector 4 from coming out of the fitting groove 3.
The first connecting plate 1 is a super-thick steel plate, the thickness of which is usually more than 20mm, and the fitting groove 3 can be machined on the plate surface of the first connecting plate 1 by a common machining method, specifically, the machining is usually performed by multi-step grooving, slotting or plunge cutting.
The depth of the embedding groove 3 is larger than one third of the thickness of the first connecting plate 1 and smaller than or equal to two thirds of the thickness of the first connecting plate 1, so that on the basis that the embedding effect of the embedding groove 3 is fully exerted, the strength of the first connecting plate 1 is not influenced, and the first connecting plate 1 is prevented from obviously deforming in the cast-weld-rivet composite connection process to influence the connection effect.
The length of the fitting groove 3 is smaller than or equal to the length of the first connecting plate 1, and one end surface thereof is aligned with the end surface of the first connecting plate 1 to form a groove body having an opening at least at one end.
Meanwhile, the fitting groove 3 should further have a limiting section, the length of which is less than half of the length of the fitting groove 3, and the limiting section can be located at any position of the fitting groove 3 and used for limiting the connector 4 from coming out of the fitting groove 3, namely, limiting the movement of the connector in the direction perpendicular to the plate surface of the first connecting plate 1.
Alternatively, in order to reduce the difficulty of machining and improve the versatility between the connecting members, the fitting groove 3 may be a groove body that meets the mechanical industry standards, such as a dovetail-shaped fitting groove, and a cross-sectional view of the dovetail-shaped fitting groove is shown in fig. 5. In the design process, the size parameter of the dovetail-shaped embedding groove matched with the thickness of the first connecting plate 1 can be selected by a table look-up method and the like.
Step S102, processing a connector 4 matched with the embedding groove 3 on the end face of the second connecting plate 2; wherein the size of the connector 4 is smaller than that of the fitting groove 3.
The second connecting plate 2 is a super-thick steel plate, the thickness of the second connecting plate is usually more than 20mm, and the connecting head 4 matched with the embedding groove 3 can be processed on the body of the second connecting plate 2 by adopting methods such as hot forging, hot upsetting and the like. The width and depth of the connector 4 should be smaller than those of the fitting groove 3, and the length of the connector 4 may be smaller than or equal to that of the fitting groove 3.
After the connector 4 is inserted into the fitting groove 3 from the end of the fitting groove 3 having the opening, the relative position between the connector 4 and the fitting groove 3, specifically, the relative position between the connector 4 and the fitting groove 3 in the direction perpendicular to the plate surface of the first connecting plate 1, is limited by the limiting section of the connector 4 for cooperating with the limiting section of the fitting groove 3, so as to connect the first connecting plate 1 and the second connecting plate 2.
Alternatively, the shape of the connecting head 4 that fits the fitting groove 3 and meets the mechanical industry standard may be selected, and the size parameter of the connecting head 4 may be determined by table lookup or the like.
And step S103, respectively coating high self-propagating heat release coatings on the surfaces of the connector 4 and the embedding groove 3, wherein the self-propagating heat release coatings are a mixture of thermite and adhesive.
When the self-propagating exothermic paint is subjected to self-propagating reaction, the temperature of the self-propagating exothermic paint can reach 3000 ℃ at most, and the self-propagating exothermic paint can melt an ultra-thick steel plate made of metal such as steel or iron at high temperature.
And S104, after the self-propagating exothermic paint is dried, clamping the connector 4 into the embedding groove 3, and injecting casting liquid 8 into a gap formed between the connector 4 and the embedding groove 3 so that the self-propagating exothermic paint performs a self-propagating reaction, and further melting the connector 4 and the surface of the embedding groove 3, so that the second connecting plate 2 is metallurgically connected with the first connecting plate 1 in a cast-weld rivet compound mode.
After the connector 4 is inserted into the fitting groove 3 from the opening at one end of the fitting groove 3, a gap is formed between the surface of the connector 4 and the surface of the fitting groove 3 because the depth and width of the connector 4 are smaller than those of the fitting groove 3. The casting liquid 8 is injected into the gap to promote the self-propagating reaction of the self-propagating exothermic paint, so that the surfaces of the connecting head 4 and the embedding groove 3 are melted under the action of high temperature released by the self-propagating exothermic paint reaction, the connection tightness between the surfaces and the casting liquid 8 is enhanced, the cast welding of the first connecting plate 1 and the second connecting plate 2 is realized, and the second connecting plate 2 is welded to the first connecting plate 1.
In the embodiment, the first connecting plate 1 and the second connecting plate 2 are connected by processing the embedded groove 3 on the surface of the first connecting plate 1 and processing the connector 4 matched with the embedded groove 3 on the end surface of the second connecting plate 2, and simultaneously, the casting liquid 8 is injected into the gap between the embedded groove 3 and the connector 4 by combining the cast welding and riveting composite connection method, so that the first connecting plate 1 and the second connecting plate 2 are fixed, and the T-shaped joint is welded quickly. In the process, the welding steps are reduced, the welding process is shortened, meanwhile, the connection strength of the first connecting plate 1 and the second connecting plate is ensured through the mutual embedding of the embedding groove 3 and the connecting head 4, and the welding method is efficient and high in quality.
In a second aspect of the present invention, an embodiment is provided, and fig. 3 shows a step diagram of another T-shaped joint cast-weld-rivet composite connection method, as shown in fig. 3, the method specifically includes:
step S201, processing a fitting groove 3 on the plate surface of the first connecting plate 1, wherein the fitting groove 3 has a limiting section, the limiting section is used for limiting the connector 4 to be separated from the fitting groove 3, an orthogonal projection of the limiting section on the groove bottom of the fitting groove 3 is covered by the groove bottom, an orthogonal projection of the notch of the fitting groove 3 on the groove bottom is covered by an orthogonal projection of the limiting section on the groove bottom of the fitting groove 3.
The first connecting plate 1 is a super-thick steel plate, the thickness of which is usually more than 20mm, and the fitting groove 3 can be machined on the plate surface of the first connecting plate 1 by a common machining method, specifically, the machining is usually performed by multi-step grooving, slotting or plunge cutting.
The depth of the embedding groove 3 is larger than one third of the thickness of the first connecting plate 1 and smaller than or equal to two thirds of the thickness of the first connecting plate 1, so that on the basis of ensuring the embedding effect of the embedding groove 3, the strength of the first connecting plate 1 is not influenced, and the first connecting plate 1 is prevented from generating obvious deformation in the cast-weld process to influence the connection effect.
The length of the embedding groove 3 is less than or equal to that of the first connecting plate 1, and one end surface of the embedding groove is aligned with the end surface of the first connecting plate 1 to form a groove body with an opening at least at one end.
Meanwhile, the fitting groove 3 should also have a limiting section, the length of which is less than half of the length of the fitting groove 3, and the limiting section can be located at any position of the fitting groove 3, so as to limit the connector 4 from coming out of the fitting groove 3, i.e. to limit the movement in the direction perpendicular to the plate surface of the first connecting plate 1.
In order to ensure the limiting function of the limiting section, the orthographic projection of the limiting section on the groove bottom of the embedding groove 3 is covered by the groove bottom, and the orthographic projection of the notch of the embedding groove 3 on the groove bottom is covered by the orthographic projection of the limiting section on the groove bottom of the embedding groove 3.
Alternatively, in order to reduce the processing difficulty and improve the versatility among the connecting members, the fitting groove 3 may be a groove body that meets the mechanical industry standards, such as a dovetail-shaped fitting groove. In the design process, the size parameter of the dovetail-shaped embedding groove matched with the thickness of the first connecting plate 1 can be selected by a table look-up method and the like.
Step S202, processing a connector 4 matched with the embedding groove 3 on the end face of the second connecting plate 2; wherein the size of the connector 4 is smaller than that of the fitting groove 3.
The second connecting plate 2 is a super-thick steel plate, the thickness of the second connecting plate is usually more than 20mm, and the connecting head 4 matched with the embedding groove 3 can be processed on the body of the second connecting plate 2 by adopting methods such as hot forging, hot upsetting and the like. The width and depth of the connector 4 should be smaller than those of the fitting groove 3, and the length of the connector 4 may be smaller than or equal to that of the fitting groove 3.
After the connector 4 is inserted into the fitting groove 3 from the end of the fitting groove 3 having the opening, the relative position between the connector 4 and the fitting groove 3, specifically, the relative position between the connector 4 and the fitting groove 3 in the direction perpendicular to the plate surface of the first connecting plate 1, is limited by the limiting section of the connector 4 for cooperating with the limiting section of the fitting groove 3, so as to connect the first connecting plate 1 and the second connecting plate 2.
Alternatively, the connector 4 may be in a shape which is matched with the fitting groove 3 and meets the mechanical industry standard, and the size parameters of the connector 4 may be determined by table lookup and the like, wherein the height and the width of the connector 4 should be 30-40mm smaller than those of the fitting groove 3.
Step S203, laying an iron pad layer on the bottom of the fitting groove 3, so that after the connector 4 is fitted into the fitting groove 3, the distance between the bottom surface of the connector 4 and the bottom surface of the fitting groove 3 is 10mm to 20mm.
Laying a layer of sizing block layer at the bottom of the processed embedded groove 3, wherein the sizing block layer comprises at least one sizing block 5, the sizing block 5 is fixed at the bottom of the embedded groove 3 through spot welding, the height of the sizing block 5 is within the range of 10-20mm, the width of the sizing block 5 is smaller than one half of the width of the bottom of the embedded groove 3, the length of the sizing block 5 is smaller than one twentieth of the length of the embedded groove 3, the total occupied area of all the sizing blocks 5 in the sizing block layer is smaller than one fiftieth of the area of the bottom of the embedded groove 3, and in addition, the chemical composition of the sizing block 5 is the same as that of the first connecting plate 1 or the second connecting plate 2.
The iron gasket layer raises the height of the connector 4, so that a gap which can flow through and contain the casting liquid 8 is formed between the bottom surface of the connector 4 and the bottom surface of the embedding groove 3, and the connecting strength of the connector 4 and the embedding groove 3 is increased.
Step S204, when the embedding groove 3 and the connector 4 are heated to the target temperature, the connector 4 is clamped into the embedding groove 3 and is kept warm for the first time, so that the overall temperature of the embedding groove 3 and the connector 4 is balanced; at the end of the first period, a casting liquid 8 is poured into a gap formed between the connector 4 and the fitting groove 3.
The casting steel mold 6, the fitting groove 3 and the connector 4 are heated to a target temperature of a minimum temperature of more than 300 degrees celsius by using a flame gun or other devices, and the target temperature should be selected within a temperature range that does not affect the welding quality and does not cause deformation of the fitting groove 3 and the connector 4. After the casting steel mold 6, the fitting groove 3, and the connector 4 are heated to a target temperature, the connector 4 is fitted into the fitting groove 3.
Along the upper surface of the shim iron layer, the connector 4 is clamped into the embedding groove 3 through an opening at one end of the embedding groove 3 along the direction parallel to the notch of the embedding groove 3, and a gap with the width equal to the height of the shim iron 5 is formed between the bottom surface of the connector 4 and the bottom surface of the embedding groove 3 through the shim iron layer.
Step S205, respectively fixing a casting steel mold 6 on each mold fixing surface by adopting box sealing mud so as to form a sprue gate between the casting steel mold 6 and the second connecting plate 2; and the sealing box mud is adopted to block the openings at the two ends of the embedding groove 3 so as to prevent the casting liquid 8 from flowing out laterally in the process of injecting the casting liquid into the gap.
The casting steel mold 6 is a metal rod-shaped object with a triangular cross section and a length greater than or equal to the length of the embedding groove 3. In order to fix casting steel mould 6 on the mould stationary plane through spot welding's mode, wherein the mould stationary plane be on the face of first connecting plate 1 with the plane of the both sides of gomphosis groove 3 notch, simultaneously, use joint sealing mud to block up the opening at gomphosis groove 3 both ends to form the cavity that can hold the liquid material between gomphosis groove 3 and the connector 4, prevent that casting liquid 8 from flowing.
Step S206, connecting the second connecting plate 2 and the first connecting plate 1 by a position fixing member, so that the connecting head 4 and the fitting groove 3 are kept relatively still during the injection process of the casting liquid 8.
The position fixing member is a rigid member, and may be in the form of a rod or a plate, which is not limited in the present invention. The first connecting plate 1 and the second connecting plate 2 are connected through the connecting heads 4 at the two ends of the position fixing piece, so that the first connecting plate and the second connecting plate are kept in a relatively static state, and the casting liquid 8 is ensured to be uniformly distributed in a gap between the connecting heads 4 and the embedding grooves 3.
Step S207, the casting liquid 8 is injected into the gap between the connector 4 and the surface of the fitting groove 3 through the pouring gate, wherein the casting liquid 8 is prepared through thermite reaction, and the chemical composition of the casting liquid 8 is the same as that of the first connecting plate 1 and/or the second connecting plate 2.
The casting liquid 8 used in this embodiment is used for smelting molten steel or molten iron in a small-sized steel or iron making furnace, and corresponding chemical elements may be added in steel making or iron making according to the chemical composition of the first connecting plate 1 and the second connecting plate 2, so that the chemical composition of the weld is the same as that of the first connecting plate 1 and the second connecting plate 2.
After the casting steel mould 6 is fixed on the mould fixing surface, a diversion port higher than the notch of the embedding groove 3 is formed on the surface of the casting steel mould 6 and the surface of the second connecting plate 2, one end of the diversion port is taken as a pouring port, and casting liquid 8 is poured into a gap between the connector 4 and the surface of the embedding groove 3.
And in the process of pouring the casting liquid 8, taking the other end of the flow guide port as an exhaust port, and exhausting air in the gap between the connector 4 and the surface of the embedding groove 3. After the pouring of the casting liquid 8 is completed, the pouring gate is used as a riser, and the casting liquid 8 is supplemented to the gap between the connector 4 and the surface of the embedding groove 3 in the process of cooling the casting liquid 8 through the redundant casting liquid 8 stored in the pouring gate so as to prevent shrinkage cavity.
Step S208, after the casting liquid 8 is solidified, removing the casting liquid 8 higher than the plate surface of the first connecting plate 1, and keeping the temperature of the connecting head 4 and the embedding groove 3 for a second time to reduce the temperature reduction speed of the connecting head 4 and the embedding groove 3.
When observing that casting liquid 8 solidifies, and casting liquid 8's temperature more than or equal to 900 degrees centigrade time, use hydraulic pressure to push away the neoplastic machine and clear up casting liquid 8 that have solidified that is higher than 1 face of first connecting plate to carry out heat preservation processing to the welding seam, heat-retaining time length should be greater than the second time, the cooling rate is the same everywhere in order to guarantee the welding seam, prevents the production of welding seam internal stress.
In a third aspect of the present invention, an embodiment is provided, and fig. 4 shows a scene schematic diagram of T-joint cast-weld, where as shown in fig. 4, the T-joint cast-weld method specifically includes the steps of:
the length is 2000mm, the width is 1000mm, the thickness is 200mm, a gomphosis groove 3 is processed on the first connecting plate 1 that the model is XTP550, through looking up the table, select the depth 100mm in the mechanical industry standard, the width 300mm, the swallow-tail form gomphosis groove 3 that the base angle is 60 degrees is the gomphosis groove 3 that this embodiment used, as shown in the schematic structural diagram of a first connecting plate with swallow-tail form gomphosis groove that figure 5 shows, gomphosis groove 3 is the open type cell body that both ends are open, the axis of cell body is parallel with the minor face of first connecting plate 1.
The length is 2000mm, the width is 1000mm, the thickness is 200mm, a connector 4 matched with the embedding groove 3 is processed on the first connecting plate 12 with the model of XTP550, as shown in a structural schematic diagram of a second connecting plate with a dovetail connector shown in FIG. 6, the cross section of the connector 4 is dovetail, and through table lookup, the connector 4 with the depth of 70mm, the width of 260mm and the bottom angle of 60 degrees is selected in the mechanical industry standard and is the connector 4 used in the embodiment.
Two sizing blocks 5 are placed at the bottom of the fitting groove 3, the sizing blocks 5 are rectangular solids with a length of 30mm, a width of 30mm and a height of 15mm, and after the fitting groove 3 and the sizing blocks 5 are heated to 300 ℃ by using oxyacetylene combustion gas, the sizing blocks 5 are fixed at the bottom of the fitting groove 3 by spot welding.
After the sizing block 5 is fixed, the connector 4 heated to 300 degrees centigrade is inserted into the fitting groove 3 from the opening at one end of the fitting groove 3 along the longitudinal direction of the fitting groove 3. After the connector 4 is clamped into the embedding groove 3, the positions of the two sides of the notch of the embedding groove 3 on the plate surface of the first connecting plate 1 are respectively fixed on the two sides of the notch of the embedding groove 3 through two casting steel molds 6 which are heated to 300 ℃ through sealing mud along the length direction of the embedding groove 3, wherein the casting steel molds 6 are triangular prisms with triangular cross sections. Meanwhile, the openings at both ends of the fitting groove 3 are sealed with box sealing mud to prevent the casting liquid 8 from overflowing.
In addition, in order to prevent the relative position of the first connecting plate 1 and the second connecting plate 2 from being changed during the pouring of the casting liquid 8, a position fixing member should be used to connect the first connecting plate 1 and the second connecting plate 2 so that the two plates are kept relatively still.
Placing thermite in a crucible with a hole at the bottom, plugging the hole at the bottom of the crucible by a choke plug before reaction, initiating thermite reaction by using oxyacetylene flame to obtain casting liquid 8, and adding chemical elements into the casting liquid 8 so as to ensure that the chemical composition of a welding line is the same as that of the first connecting plate 1 and the second connecting plate 2.
After the pouring of the casting liquid 8 is completed, the choke plug is removed, and the casting liquid 8 is drained through the pouring cup 7 and then flows into the gap formed between the fitting groove 3 and the connecting head 4. When the liquid level of the casting liquid 8 is 2-3mm higher than the notch of the embedding groove 3, stopping pouring the casting liquid 8, observing that the casting liquid 8 is solidified, and when the temperature of the casting liquid 8 is more than or equal to 900 ℃, cleaning the solidified casting liquid 8 higher than the plate surface of the first connecting plate 1 by using a hydraulic tumor pushing machine. And then, carrying out heat preservation treatment on the welding line, wherein the heat preservation duration is 3 hours, so as to ensure that the cooling speed of each part of the welding line is the same and prevent the generation of internal stress of the welding line.
A fourth aspect of the present invention provides an embodiment, as shown in a schematic diagram of a T-shaped connection structure shown in fig. 1, the structure including:
the connecting structure comprises a first connecting plate 1 and a second connecting plate 2, wherein the plate surface of the first connecting plate 1 is provided with an embedded groove 3, and the end surface of the second connecting plate 2 is provided with a connector 4 which is matched with the embedded groove 3 to be connected with the first connecting plate 1;
wherein, the size of the connector 4 is smaller than that of the tabling groove 3; the casting liquid 8 is poured into the gap formed between the connector 4 and the fitting groove 3.
According to the cast-weld method and the connection structure of the T-shaped joint, the first connecting plate 1 and the second connecting plate 2 are connected in a mode that the embedding groove 3 is machined in the plate surface of the first connecting plate 1, and the connecting head 4 matched with the embedding groove 3 is machined in the end surface of the second connecting plate 2, meanwhile, the casting liquid 8 is injected into a gap between the embedding groove 3 and the connecting head 4 by combining the cast-weld method, so that the first connecting plate 1 and the second connecting plate 2 are fixed, and finally the T-shaped joint is quickly welded. In the process, the welding steps are reduced, the welding process is shortened, meanwhile, the connection strength of the first connecting plate 1 and the second connecting plate 2 is ensured through the mutual embedding of the embedding groove 3 and the connector 4, and the welding method is efficient and high in quality.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or terminal apparatus that comprises the element.
The above-mentioned details of the method for cast-welding a T-shaped joint and the connection structure provided by the present invention are introduced, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above-mentioned examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A cast-weld rivet composite connection method of a T-shaped joint is characterized by comprising the following steps:
processing an embedded groove on the plate surface of the first connecting plate;
processing a connector matched with the embedding groove on the end face of the second connecting plate; the size of the connector is smaller than that of the tabling groove;
respectively coating a high self-propagating heat release coating on the surfaces of the connector and the embedding groove in a bonding manner, wherein the self-propagating heat release coating is a mixture of a thermite and an adhesive;
after the self-propagating exothermic paint is dried, clamping the connector into the embedding groove, and injecting casting liquid into a gap formed between the connector and the embedding groove so that the self-propagating exothermic paint performs a self-propagating reaction, and further melting the surface of the connector and the surface of the embedding groove, so that the second connecting plate is in metallurgical connection with the first connecting plate in a cast-weld rivet compound mode;
the embedded groove is provided with a limiting section, and the limiting section is used for limiting the connector to be separated from the embedded groove.
2. The method according to claim 1, wherein an orthographic projection of the stopper section at a groove bottom of the fitting groove is covered by the groove bottom.
3. The method according to claim 2, wherein an orthographic projection of the notch of the fitting groove on the groove bottom is covered by an orthographic projection of the stopper section on the groove bottom of the fitting groove.
4. The method according to claim 1, wherein before the step of snapping the connection head into the fitting groove, the method further comprises:
and paving an iron pad layer at the bottom of the embedding groove, so that after the connector is clamped into the embedding groove, the distance between the bottom surface of the connector and the bottom surface of the embedding groove is 10mm to 20mm.
5. The method according to claim 1, wherein before the step of injecting the casting liquid into the gap formed between the connection head and the fitting groove, the method further comprises:
and connecting the second connecting plate with the first connecting plate through a position fixing piece so as to ensure that the connecting head and the embedding groove keep relatively static in the injection process of the casting liquid.
6. The method according to claim 1, wherein the plate surface of the first connection plate includes mold fixing surfaces connected to both sides of the notch of the fitting groove, respectively, and after the step of fitting the connector into the fitting groove and before the step of injecting the casting liquid into the gap formed between the connector and the fitting groove, the method further comprises:
respectively fixing a casting steel mould on each mould fixing surface by adopting box sealing mud so as to form a pouring gate between the casting steel mould and the second connecting plate surface;
blocking openings at two ends of the embedding groove by using the box sealing mud so as to prevent the casting liquid from flowing out in the process of injecting the casting liquid into the gap;
the to the connector with pour into casting liquid in the clearance that forms between the gomphosis groove, include:
and injecting the casting liquid into a gap between the connector and the surface of the embedding groove through the pouring gate.
7. The method according to any one of claims 1 to 6, wherein injecting a casting liquid into a gap formed between the connector and the fitting groove after the connector is fitted into the fitting groove comprises:
when the tabling groove and the connector are heated to the target temperature, the connector is clamped into the tabling groove and is kept warm for the first time, so that the integral temperature of the tabling groove and the connector is balanced;
and at the end of the first time, pouring casting liquid into a gap formed between the connector and the embedding groove.
8. The method according to claim 1, wherein the casting liquid is molten steel smelted by a steel furnace or molten iron smelted by an iron furnace, and the chemical composition of the casting liquid is the same as that of the first connecting plate and/or the second connecting plate.
9. The method according to claim 1, wherein after the step of injecting the casting liquid into the gap formed between the connection head and the fitting groove, the method further comprises:
and after the casting liquid is solidified, removing the casting liquid higher than the plate surface of the first connecting plate, and keeping the temperature of the connector and the embedding groove for a second time so as to reduce the temperature reduction speed of the connector and the embedding groove.
10. A cast-weld-rivet composite connecting structure of a T-shaped joint is characterized by comprising a first connecting plate and a second connecting plate, wherein the plate surface of the first connecting plate is provided with an embedding groove, and the end surface of the second connecting plate is provided with a connector which is matched with the embedding groove to be connected with the first connecting plate;
the size of the connector is smaller than that of the embedding groove, and casting liquid is injected into a gap formed between the connector and the embedding groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211674758.4A CN115647571A (en) | 2022-12-26 | 2022-12-26 | Cast-weld rivet composite connection method and connection structure of T-shaped joint |
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| CN202211674758.4A CN115647571A (en) | 2022-12-26 | 2022-12-26 | Cast-weld rivet composite connection method and connection structure of T-shaped joint |
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| WO2007038651A1 (en) * | 2005-09-28 | 2007-04-05 | Cabot Corporation | Inertial bonding method of forming a sputtering target assembly and assembly made therefrom |
| CN101927336A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Large extra thick plate blank and production method thereof |
| WO2011131712A1 (en) * | 2010-04-23 | 2011-10-27 | Rheinisch-Westfälische Technische Hochschule Aachen | Metal hybrid composite casting |
| CN115213381A (en) * | 2022-09-19 | 2022-10-21 | 北京坤飞装备科技有限公司 | Connecting method for super-thick steel plates |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007038651A1 (en) * | 2005-09-28 | 2007-04-05 | Cabot Corporation | Inertial bonding method of forming a sputtering target assembly and assembly made therefrom |
| CN101927336A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Large extra thick plate blank and production method thereof |
| WO2011131712A1 (en) * | 2010-04-23 | 2011-10-27 | Rheinisch-Westfälische Technische Hochschule Aachen | Metal hybrid composite casting |
| CN115213381A (en) * | 2022-09-19 | 2022-10-21 | 北京坤飞装备科技有限公司 | Connecting method for super-thick steel plates |
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Application publication date: 20230131 |