CN102653989B - Steel bar rolling straight-thread sleeve connection construction method - Google Patents
Steel bar rolling straight-thread sleeve connection construction method Download PDFInfo
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- CN102653989B CN102653989B CN 201210121195 CN201210121195A CN102653989B CN 102653989 B CN102653989 B CN 102653989B CN 201210121195 CN201210121195 CN 201210121195 CN 201210121195 A CN201210121195 A CN 201210121195A CN 102653989 B CN102653989 B CN 102653989B
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Abstract
The invention discloses a steel bar rolling straight-thread sleeve connection construction method which comprises the following steps of: step 1, processing steel bar straight-thread joints; and step 2, connecting the steel bar joints. The method has the advantages of high joint strength, high connection speed, simple equipment operation, stable and reliable performance, wide application range, convenience in construction, low joint price and the like; and meanwhile, the steel bar joint formed by the method has high reliability and stable structure, all performance indexes can meet the requirements of the technical regulations, and the steel bar joint is particularly suitable for connecting large-batch large-diameter steel bars at some important parts.
Description
Technical field
The present invention relates to the method for attachment of bar splice in a kind of building operations, be specifically related to a kind of rolling bar straight screw sleeve connection construction method.
Background technology
In existing construction process, mechanical connection technique of reinforcement is that a new reinforcing steel bar connects technique, be called as " third generation bar splice " after colligation, electric welding, have strength of joint higher than parent material of reinforcement rebar, speed than fast 5 times of electric welding, pollution-free, save the advantage such as steel 20%.
The technique of reinforced bar mechanical connector mainly contains following several: cover letter extruding connection, taper thread sleeve connection, upsetting straight connection etc.; Sleeve extruding jointing: the joint that makes the plastic strain of connector steel bushing and the tight interlock formation of Ribbed Bar by extruding force.Two kinds of forms are arranged, and radial compression connects and is connected with axial compression.Due to axial compression connect the site operation inconvenience and joint quality stable not, be not promoted; And the radial compression link technique, jointing has obtained the spread use, and the sleeve extruding jointing that uses in engineering now is all that radial compression connects.
Taper thread jointing: the joint that forms by the special tapered thread of steel bar end and the interlock of connector tapered thread.The birth of taper threaded connection technique has overcome the deficiency that the sleeve extruding link technique exists.Taper thread silk head is prefabricated in advance fully, and it is short that joint connection in site takies the duration, and on-the-spot only the need used the moment wrench operated, need not move equipment and pull electric wire, deeply is subjected to the favorable comment of each unit in charge of construction.But taper thread jointing quality is stable not.Weaken the cross-sectional area of mother metal due to the path of machining screw, thereby reduced strength of joint, generally can only reach 85～95% of the actual tensile strength of mother metal.
Upsetting straight jointing: by the joint of the latter made straight thread of steel bar end jumping-up and the formation of connector threaded engagement.Its advantage of upsetting straight jointing is that intensity is high, and site operation speed is fast, and labor strength is low, and reinforced bar straight thread silk head is all prefabricated in advance, and joint connection in site is assembling work.Its weak point is to be prone in upsetting process the inclined to one side phenomenon of upsetting, in case upsetting must be cut away heavily upsetting partially; Produce internal stress in upsetting process, steel bar thick part ductility reduces, and easily produces the brittle failure phenomenon, and screw thread processing needs two procedures two complete equipments to complete.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, provide a kind of rolling bar straight screw sleeve connection construction method, the advantage such as the method has that strength of joint is high, connection speed is fast, equipment operating is simple, stable and reliable for performance, applied widely, easy construction, joint are cheap.
Technical scheme: a kind of rolling bar straight screw sleeve connection construction method of the present invention comprises the steps: the processing of step 1, reinforced bar straight thread joint; Comprise following operation:
(1-1) reinforcing steel bar rib-stripping rolled thread machine is marched into the arena and is installed and the raw material of reinforcement rebar check;
(1-2) carry out Steel Reinforcing Bar Material according to charger sheet; At first the steel bar stretching straightening should be used the red line sign in the cut place, then cut reinforcing bar with cutting machine, the otch end face should be vertical with the reinforcing bar axis, with fine grinding wheel polishing reinforcing bar end face, makes it smooth smooth at last;
(1-3) with reinforcing steel bar rib-stripping rolled thread machine, steel bar end is carried out the roll forming mantle fiber,
At first steel bar end is immersed in water-soluble lubricating liquid and soaked 1-2 minute,
Then reinforcing bar is eliminated by the reinforcing steel bar rib-stripping rolled thread machine rib line that it is surperficial of adjusting in advance direct and length,
Take out reinforcing bar, again it immersed in water-soluble lubricating liquid and soaked 2-5 minute, make its Cooling and Lubricator surperficial, again steel bar end is inserted reinforcing steel bar rib-stripping rolled thread machine and carry out the roll extrusion mantle fiber,
Use at last the sand papering termination, make silk mouthful bright and clean, smooth, and with coarse plain emery wheel with the port hacking;
The strict length of controlling the silk mouth in process, a silk mouthful diameter surely closes mutually with sleeve silk mouth diameter;
(1-4) self check of a silk quality, at first carry out the presentation quality inspection, the snaggletooth number of end reinforced screw thread must be less than 3 teeth, must be less than 1/4 week in the every circumference of screw thread part defects in teeth, then detect a silk length with calliper, detect a silk diameter with ring gauge, qualified silk head is filled in detection record and carried out the location colour-marking line, the plastic protective sleeve of screwing in bar splice, the nose heave new processing of underproof silk;
(1-5) sampling observation of a silk quality to the random examination at random 10% of its minute lot number, and is no less than 10, use the specialized barrel verification, and is defective if any a silk, and namely to this processing batch exhaustive test, defective silk should be processed again through again using after the assay was approved;
(1-6) termination test specimen mechanical property test, the mechanical property field test of termination is undertaken by checking and accepting to criticize, adopt the ad eundem of same material under same execution conditions, same pattern, the same specification joint, check and accept batch take 500 as one, also checking and accepting as one of 500 of less thaies batch calculated, continuous 10 examinations are criticized when the scene, by electronic tension tester, it is carried out tensile strength, elongation rate and yield strength detect, when whole test specimens once are when qualified, check and accept batch joint quantity and can expand as 1500, each of butt joint is checked and accepted and is criticized, should randomly draw 3 test specimens and do the simple tension strength test, its performance indications must all reach A level joint performance requirement in " reinforcing steel bar machinery connection universal tecnical regulations " JGJ107-96, undesirable if any a test specimen tensile strength, should randomly draw 6 test specimens reviews again, as still have a test specimen tensile strength undesirable, this is checked and accepted batch is defective,
Step 2, connecting reinforcement joint; Comprise following operation:
(2-1) examination of branch sleeve;
(2-2) protective cap on assembling reinforcement, recovery reinforcing bar to be connected;
(2-3) reinforcing bar is connected by branch sleeve; At first steel bar end is smeared one deck wheel lubricating oil,
Then the end with branch sleeve is arranged on the termination of reinforcing bar, with the work spanner, it is tightened to colour-marking line, again another steel bar end be screwed into the branch sleeve other end and tighten to colour-marking line, during operation, with work spanner revoling tube or reinforcing bar, the silk head is held out against at the sleeve pipe middle position, complete connection, the socket end limit should be dropped on a leader colo(u)r streak, and must not have the above complete silk mouth of two buttons to expose;
(2-4) check with torque spanner, carry out the paint sign on the joint that connects, the expression inspected is completed;
(2-5) mechanical property of bar splice test specimen experiment, under same execution conditions, adopt the ad eundem of same material, same pattern, the same specification joint, test and check and accept take 300 of continuous productions as an inspection lot, the inspection lot of also pressing that less than is 300 calculates, to each inspection lot joint, must intercept at random 3 joint test pieces in the engineering structures of Hot work in progress and make tensile strength and compression test, the result of steel bar connector field trial, should meet the pertinent regulations in existing industry standard " reinforcing steel bar machinery connection universal tecnical regulations " JGJ107-2003,
(2-6) the antirust processing of bar splice is smeared one deck waterproof agent with the two ends of sleeve and the contact position of reinforcing bar, makes water in concrete can't enter joint inside.
(2-7) at the outside of bar splice parcel layer of steel wire net, the reinforcing bar packages length at this gauze wire cloth and sleeve two ends is respectively 10-15cm.
Further, in described step 2, the examination of branch sleeve should be tested by DBJ/CT005-2002 5.1.7 bar regulation, sleeve non-corroding, defects i.e.cracks, on screw thread without pollutions such as greasy dirts, the sleeve visual inspection is checked and accepted as one with 500 joints and is criticized, and inspects by random samples by 10% for every batch, and probability of acceptance of spot check should be not less than 95%, otherwise this sleeve is answered one by one inspection, can use after qualified.
Further, in described step 2, the examination of branch sleeve comprises that also adopting logical feeler gauge and detent plug to advise to the sampling test specimen carries out an acceptance inspection, and described logical feeler gauge can screw in smoothly, and detent plug rule screw-in length is no more than 3P, is up to the standards.
The screw-down torque of bar splice is the important guarantee of strength of joint and deformation performance, when joint screw-down torque value reaches the standard-required value, screw thread fit clearance each other disappears, could satisfy intensity and the deformation requirements of joint, the performance of the excessive too small all butt joints of screw-down torque is unfavorable, so the operation that checks with torque spanner in described step 2 is when the reinforcing bar of different-diameter connects, to different screw-down torque values should be arranged.
Further, the operation that checks with torque spanner in described step 2, when the diameter of connecting reinforcement was 36-40mm, corresponding screw-down torque value was 360Nm.
The present invention compared with prior art, its beneficial effect is: the advantage such as rolling bar straight screw sleeve connection construction method of the present invention, the method have that strength of joint is high, connection speed is fast, equipment operating is simple, stable and reliable for performance, applied widely, easy construction, joint are cheap; The bar splice reliability that forms by the method simultaneously is high, Stability Analysis of Structures, and each phase performance indications all can reach the requirement of tecnical regulations, are particularly suitable for the large batch of Large-size rebar of some significant points and connect.
Description of drawings
Fig. 1 is the process flow chart of step 1 of the present invention.
Fig. 2 is the process flow chart of step 2 of the present invention.
The specific embodiment
The below is elaborated to technical solution of the present invention, but protection scope of the present invention is not limited to described embodiment.
A kind of rolling bar straight screw sleeve connection construction method comprises the steps:
The processing of step 1, reinforced bar straight thread joint; As shown in Figure 1, comprise following operation:
(1) check of march into the arena installation and the raw material of reinforcement rebar of reinforcing steel bar rib-stripping rolled thread machine; Take " decide the people and decide machine, special messenger be responsible for " system, the accredited upper machine of reinforcing steel bar rib-stripping rolled thread machine operation personnel, the support staff forbids start, and raw material of reinforcement rebar must have product certificate, and mutatis mutandis card is rechecked and can be used after qualified;
(2) carry out Steel Reinforcing Bar Material according to charger sheet, at first the steel bar stretching straightening should be used the red line sign in the cut place, then cut reinforcing bar with cutting machine, the otch end face should be vertical with the reinforcing bar axis, with fine grinding wheel polishing reinforcing bar end face, makes it smooth smooth at last; Can facilitate steel bar end stripping rib roll forming mantle fiber by above-mentioned technique, the positional precision of raising silk mouth and the quality of silk mouth are convenient to the connection of sleeve, thereby are improved the mechanical property that whole reinforcing bar connects.
(3) with reinforcing steel bar rib-stripping rolled thread machine, steel bar end is carried out the roll forming mantle fiber,
At first steel bar end is immersed in water-soluble lubricating liquid and soaked 1-2 minute, make the termination be stained with sliding agent, be convenient to follow-up rib line and eliminate, reduce its temperature.
Then reinforcing bar is eliminated by the reinforcing steel bar rib-stripping rolled thread machine rib line that it is surperficial of adjusting in advance direct and length,
Take out reinforcing bar, again it immersed in water-soluble lubricating liquid and soaked 2-5 minute, make its Cooling and Lubricator surperficial, again steel bar end is inserted reinforcing steel bar rib-stripping rolled thread machine and carry out the roll extrusion mantle fiber,
Use at last the sand papering termination, make silk mouthful bright and clean, smooth, and with coarse plain emery wheel with the port hacking;
To shell rib and the roll extrusion mantle fiber operates respectively, further improve the quality of silk mouthful, increase the reliability of joint.
The strict length of controlling the silk mouth in process, a silk mouthful diameter surely closes mutually with sleeve silk mouth diameter, guarantees the quality of joint;
(4) self check of a silk quality, at first carry out the presentation quality inspection, the snaggletooth number of end reinforced screw thread should be greater than 3 teeth, should be greater than 1/4 week in the every circumference of screw thread part defects in teeth, then detect a silk length with calliper, detect a silk diameter with ring gauge, qualified silk head is filled in detection record and carried out the location colour-marking line, the plastic protective sleeve of screwing in bar splice, the nose heave new processing of underproof silk;
(5) sampling observation of a silk quality is through the qualified steel bar head of self check, to the random examination at random 10% of its minute lot number, and be no less than 10, use the specialized barrel verification, defective if any a silk, namely to this processing batch exhaustive test, defective silk head should be processed again through again using after the assay was approved;
(6) termination test specimen mechanical property test, the mechanical property field test of termination is undertaken by checking and accepting to criticize, adopt the ad eundem of same material under same execution conditions, same pattern, the same specification joint, check and accept batch take 500 as one, also checking and accepting as one of 500 of less thaies batch calculated, continuous 10 examinations are criticized when the scene, by electronic tension tester, it is carried out tensile strength, elongation rate and yield strength detect, when whole test specimens once are when qualified, check and accept batch joint quantity and can expand as 1500, each of butt joint is checked and accepted and is criticized, should randomly draw 3 test specimens and do the simple tension strength test, its performance indications must all reach A level joint performance requirement in " reinforcing steel bar machinery connection universal tecnical regulations " JGJ107-96, undesirable if any a test specimen tensile strength, should randomly draw 6 test specimens reviews again, as still have a test specimen tensile strength undesirable, this is checked and accepted batch is defective,
Step 2, connecting reinforcement joint as shown in Figure 2, comprise following operation:
(1) examination of branch sleeve, sleeve must have product certificate and onsite acceptance qualified, the examination of sleeve should be tested by DBJ/CT005-2002 5.1.7 bar regulation, the sleeve non-corroding, defects i.e.cracks, on screw thread without pollutions such as greasy dirts, the sleeve visual inspection is checked and accepted as one with 500 joints and is criticized, every batch by 10% sampling observation, probability of acceptance of spot check should be not less than 95%, otherwise this sleeve is answered one by one inspection, and adopt logical feeler gauge and detent plug rule to carry out an acceptance inspection to the sampling test specimen, described logical feeler gauge can screw in smoothly, detent plug rule screw-in length is no more than 3P, be up to the standards,
(2) protective cap on assembling reinforcement, recovery reinforcing bar to be connected, be transported to structure with reinforcing bar to be connected and use the position emplace, guarantees that the silk mouth stands intact, and protective cap taken off be put in fixing collection box;
(3) reinforcing bar is connected by branch sleeve; At first steel bar end is smeared one deck wheel lubricating oil,
Then the end with branch sleeve is arranged on the termination of reinforcing bar, with the work spanner, it is tightened to colour-marking line, again another steel bar end be screwed into the branch sleeve other end and tighten to colour-marking line, during operation, with work spanner revoling tube or reinforcing bar, the silk head is held out against at the sleeve pipe middle position, complete connection, the socket end limit should be dropped on a leader colo(u)r streak, and must not have the above complete silk mouth of two buttons to expose;
(4) check with torque spanner, carry out the paint sign on the joint that connects, expression has connected to be completed;
(5) mechanical property of bar splice test specimen experiment, under same execution conditions, adopt ad eundem, same pattern, the same specification joint of same material, test and check and accept take 300 of continuous productions as an inspection lot, the inspection lot of also pressing that less than is 300 calculates, to each inspection lot joint, must intercept at random 3 joint test pieces in the engineering structures of Hot work in progress and make tensile strength and compression test, the result of steel bar connector field trial should meet the pertinent regulations in existing industry standard " reinforcing steel bar machinery connection universal tecnical regulations " JGJ107-2003.
(6) the antirust processing of bar splice is smeared one deck waterproof agent with the two ends of sleeve and the contact position of reinforcing bar, makes water in concrete can't enter joint inside, guarantees mechanical property and the durability of joint;
(7) at the outside of bar splice parcel layer of steel wire net, the reinforcing bar packages length at this gauze wire cloth and sleeve two ends is respectively 10-15cm, joint is fully contacted with concrete, bring into play more fully the mechanical property of joint, increase the stability of joint.
The screw-down torque of bar splice is the important guarantee of strength of joint and deformation performance, when joint screw-down torque value reaches the standard-required value, screw thread fit clearance each other disappears, could satisfy intensity and the deformation requirements of joint, the performance of the excessive too small all butt joints of screw-down torque is unfavorable, so operation that checks with torque spanner in described step 2, when the reinforcing bar of different-diameter connects, to different screw-down torque values should be arranged, when the diameter of connecting reinforcement was 36-40mm, corresponding screw-down torque value was 360Nm.
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the claims definition, can make in the form and details various variations to it.
Claims (5)
1. a rolling bar straight screw sleeve connection construction method, is characterized in that, comprises the steps: the processing of step 1, reinforced bar straight thread joint; Comprise following operation:
(1-1) reinforcing steel bar rib-stripping rolled thread machine is marched into the arena and is installed and the raw material of reinforcement rebar check;
(1-2) carry out Steel Reinforcing Bar Material according to charger sheet; At first the steel bar stretching straightening should be used the red line sign in the cut place, then cut reinforcing bar with cutting machine, the otch end face should be vertical with the reinforcing bar axis, with fine grinding wheel polishing reinforcing bar end face, makes it smooth smooth at last;
(1-3) with reinforcing steel bar rib-stripping rolled thread machine, steel bar end is carried out the roll forming mantle fiber,
At first steel bar end is immersed in water-soluble lubricating liquid and soaked 1-2 minute,
Then the reinforcing steel bar rib-stripping rolled thread machine by adjusting in advance diameter and length eliminates the rib line of its cross cut end (of a beam) with reinforcing bar,
Take out reinforcing bar, again it immersed in water-soluble lubricating liquid and soaked 2-5 minute, make its Cooling and Lubricator surperficial, again steel bar end is inserted reinforcing steel bar rib-stripping rolled thread machine and carry out the roll extrusion mantle fiber,
Use at last the sand papering termination, make silk mouthful bright and clean, smooth, and with coarse plain emery wheel with the port hacking;
The strict length of controlling the silk mouth in process, a silk mouthful diameter surely closes mutually with sleeve silk mouth diameter;
(1-4) self check of a silk quality, at first carry out the presentation quality inspection, the snaggletooth number of end reinforced screw thread must be less than 3 teeth, must be less than 1/4 week in the every circumference of screw thread part defects in teeth, then detect a silk length with calliper, detect a silk diameter with ring gauge, qualified silk head is filled in detection record and carried out the location colour-marking line, the plastic protective sleeve of screwing in bar splice, the nose heave new processing of underproof silk;
(1-5) sampling observation of a silk quality to the random examination at random 10% of its minute lot number, and is no less than 10, use the specialized barrel verification, and is defective if any a silk, and namely to this processing batch exhaustive test, defective silk should be processed again through again using after the assay was approved;
(1-6) termination test specimen mechanical property test, the mechanical property field test of termination is undertaken by checking and accepting to criticize, adopt the ad eundem of same material under same execution conditions, same pattern, the same specification joint, check and accept batch take 500 as one, also checking and accepting as one of 500 of less thaies batch calculated, continuous 10 examinations are criticized when the scene, by electronic tension tester, it is carried out tensile strength, elongation rate and yield strength detect, when whole test specimens once are when qualified, check and accept batch joint quantity and can expand as 1500, each of butt joint is checked and accepted and is criticized, should randomly draw 3 test specimens and do the simple tension strength test, its performance indications must all reach A level joint performance requirement in " reinforcing steel bar machinery connection universal tecnical regulations " JGJ107-96, undesirable if any a test specimen tensile strength, should randomly draw 6 test specimens reviews again, as still have a test specimen tensile strength undesirable, this is checked and accepted batch is defective,
Step 2, connecting reinforcement joint; Comprise following operation:
(2-1) examination of branch sleeve;
(2-2) protective cap on assembling reinforcement, recovery reinforcing bar to be connected;
(2-3) reinforcing bar is connected by branch sleeve; At first steel bar end is smeared one deck lubrication oil,
Then the end with branch sleeve is arranged on the termination of reinforcing bar, with the work spanner, it is tightened to colour-marking line, again another steel bar end be screwed into the branch sleeve other end and tighten to colour-marking line, during operation, with work spanner revoling tube or reinforcing bar, the silk head is held out against at the sleeve pipe middle position, complete connection, the socket end limit should be dropped on a leader colo(u)r streak, and must not have the above complete silk mouth of two buttons to expose;
(2-4) check with torque spanner, carry out the paint sign on the joint that connects, the expression inspected is completed;
(2-5) mechanical property of bar splice test specimen experiment, under same execution conditions, adopt the ad eundem of same material, same pattern, the same specification joint, test and check and accept take 300 of continuous productions as an inspection lot, the inspection lot of also pressing that less than is 300 calculates, to each inspection lot joint, must intercept at random 3 joint test pieces in the engineering structures of Hot work in progress and make tensile strength and compression test, the result of steel bar connector field trial, should meet the pertinent regulations in existing industry standard " reinforcing steel bar machinery connection universal tecnical regulations " JGJ107-2003,
(2-6) the antirust processing of bar splice is smeared one deck waterproof agent with the two ends of sleeve and the contact position of reinforcing bar, makes water in concrete can't enter joint inside;
(2-7) at the outside of bar splice parcel layer of steel wire net, the reinforcing bar packages length at this gauze wire cloth and sleeve two ends is respectively 10-15cm.
2. rolling bar straight screw sleeve connection construction method according to claim 1, it is characterized in that, in described step 2, the examination of branch sleeve should be tested by DBJ/CT005-2002 5.1.7 bar regulation, sleeve non-corroding, crack defect, on screw thread, without oil pollution, the sleeve visual inspection is checked and accepted as one with 500 joints and is criticized, every batch by 10% sampling observation, probability of acceptance of spot check should be not less than 95%, otherwise this sleeve is answered one by one inspection, can use after qualified.
3. rolling bar straight screw sleeve connection construction method according to claim 2, it is characterized in that, in described step 2, the examination of branch sleeve comprises that also adopting logical feeler gauge and detent plug to advise to the sampling test specimen carries out an acceptance inspection, described logical feeler gauge can screw in smoothly, detent plug rule screw-in length is no more than 3P, is up to the standards.
4. rolling bar straight screw sleeve connection construction method according to claim 1, is characterized in that, the operation that checks with torque spanner in described step 2 is when the reinforcing bar of different-diameter connects, to different screw-down torque values should be arranged.
5. rolling bar straight screw sleeve connection construction method according to claim 4, is characterized in that, the operation that checks with torque spanner in described step 2, and when the diameter of connecting reinforcement was 36-40mm, corresponding screw-down torque value was 360Nm.
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| CN 201210121195 CN102653989B (en) | 2012-04-24 | 2012-04-24 | Steel bar rolling straight-thread sleeve connection construction method |
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| CN 201210121195 CN102653989B (en) | 2012-04-24 | 2012-04-24 | Steel bar rolling straight-thread sleeve connection construction method |
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| CN109057340B (en) * | 2018-09-10 | 2023-11-24 | 中国建筑第二工程局有限公司 | Building site is appurtenance for prewetting brick |
| CN109433832A (en) * | 2018-10-25 | 2019-03-08 | 盐城市联鑫钢铁有限公司 | It solves screw-thread steel screw thread during mantle fiber and the process of gap problem occurs |
| CN110992600A (en) * | 2019-12-06 | 2020-04-10 | 万翼科技有限公司 | Building material dispensing and receiving method and related equipment |
| CN112845997A (en) * | 2020-12-29 | 2021-05-28 | 天门天晟新型材料科技有限公司 | Bending processing technology for anti-theft net guardrail |
| CN113216522B (en) * | 2021-05-17 | 2022-12-23 | 吉林建筑大学 | Steel bar connecting method |
| CN114043250A (en) * | 2022-01-07 | 2022-02-15 | 中建八局第二建设有限公司 | Integrated steel bar mechanical connection machining operation platform and operation method |
| CN115110700A (en) * | 2022-06-30 | 2022-09-27 | 中铁二十局集团第一工程有限公司 | Main rib threaded mechanical connection structure |
| CN117627364A (en) * | 2022-08-16 | 2024-03-01 | 上海宝冶集团有限公司 | Connecting method of steel bar straight thread sleeve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2081650A1 (en) * | 1992-01-24 | 1993-07-25 | Geoffrey M. Bowmer | High dynamic strength reinforcing bar splice and method of making |
| CN1160167C (en) * | 1999-08-26 | 2004-08-04 | 中国建筑科学研究院建筑机械化研究分院 | Equistrength link technique and equipment of ribbed reinforcing bars by removing ribs and rolling threads |
| CN2626645Y (en) * | 2003-07-18 | 2004-07-21 | 张有龙 | Equal strength rib peeling and rolling external thread mechanism for steel bar with rib |
| CN201224954Y (en) * | 2008-07-16 | 2009-04-22 | 浙江勤业建工集团有限公司 | Bar reinforcement sleeve connection structure |
| CN101554697B (en) * | 2008-08-27 | 2012-05-23 | 建研科技股份有限公司 | Improve thread machining device of steel bar joint resistance to deformation ability |
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