CN101172325A

CN101172325A - Method for producing angle pin casing tube

Info

Publication number: CN101172325A
Application number: CNA2006101545059A
Authority: CN
Inventors: 吴春茶
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-31
Filing date: 2006-10-31
Publication date: 2008-05-07

Abstract

The invention relates to a production method of a taper pin sleeve, which is characterized in that a wire rod produced by a steel works and not processed through nodularization is adopted as raw material, by the nodularization processing once, and then a cold flow pressing and forming step is passed after being discharged, the discharging wire rod is extruded and formed a sleeve blank, a central inner hole and a surface conical surface are rushed out during the cold flow pressing and forming process, and then an inner hole at the center of a pipe sleeve is generated a thread, a ditch and a groove, and then the inner hole is cutted into at least two equal amounts of demi bodies, at last, an outloading and packaging step is performed, the packaging and the outloading are performed to well processed taper pin sleeve. The process method of the invention is more rational, the production efficiency is high, the energy is saved and the material is saved, thereby the cost is reduced.

Description

A kind of production method of angle pin casing tube

Technical field

The present invention relates to a kind of production method that is used for the angle pin casing tube of prestress system structure.

Background technology

Along with improving constantly of living standards of the people; Communication is more and more flourishing; The parts such as intermediate plate, connected body have been used widely at various highways and elevated bridge or bridge spanning the sea; Owing to limited by the conventional metals machining manufacture; Such securing member pull resistance deficiency; Cause steel strand wires to break or advance to split; And make steel strand wires and intermediate plate or sleeve pipe produce the drawback of sliding or breaking; So; There are scientific and technical personnel that the processing and fabricating method of the prestressed intermediate plate of traditional lifting or angle pin casing tube is improved

As the patent No. is that 03109139.3 Chinese patent " promotes the method for intermediate plate, intermediate plate extruded sleeve and anchor head structural strength ", it is characterized in that: it is raw material that this method adopts rod iron, this rod iron is through the process of a nodularization and cold forging, it comprises following steps: the secondary nodularization: the molecular structure that rod iron is original is broken up, and makes it present less molecular particle; Forge: the less molecular particle after the nodularization is rearranged combination, make it more closely closely knit, and the portal moulding of position, groove or tapering of impact forging in cold forging or hot forging process, promptly finish the making of intermediate plate, intermediate plate extruded sleeve and anchor head.It no doubt has its progressive one side, still, also has a lot of deficiencies, and as adopting rod iron, the length of rod iron generally has only 20 meters long, and continuous processing is caused difficulty, and produces more stub bar and material tail, causes wastage of material; And adopted twice nodularization and high frequency to handle, and both increased processing step, wasted the energy again, caused the cost rising, adopt cold forging or thermal forging technology, cause production efficiency low, production capacity can not finely promote.

As the patent No. is 01138021.7 Chinese patent " a kind of new technology of gripper production for prestressed reinforcement processing ", it comprises the raw material spheroidizing, extruding center thread Pilot hole, cut the end, it is characterized in that the raw material after the spheroidizing pass through extruding center thread Pilot hole, internal material up instead flows through sidewall, the raw material of center thread Pilot hole are added on the height, the clout that equates with side thickness that the bottom is left is cut the end, when shaping outer cone and inner cone, the shaping plug is put into the blank material that squeezes good hole, in forming process, the raw material part of outer cone extends upward, and the side force of another part process tapering is included on the shaping plug its material tightly and forms inner cone.Its a fly in the ointment is need carry out spheroidising to raw material, but increase processing cost, do not adopt quantity-produced multistation single lead screw ex truding briquetting machine in the extrusion process, inefficiency, and, adopt plug to put in the blank material that squeezes good hole, extrusion modling goes out the conical surface again, gets plug then, so, take out the plug process and acquire a certain degree of difficulty, process is not quite reasonable.

Comprehensively above-mentioned, this intermediate plate extruded sleeve technology exists defectives such as working (machining) efficiency is low, energy consumption big, production capacity can not promote well, still requires further improvement.

Summary of the invention

Technical problem to be solved by this invention provides a kind of production method of angle pin casing tube, and its process is more reasonable, the production efficiency height, and energy-conservation material-saving reduces cost.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of production method of angle pin casing tube, it is characterized in that adopting steel plant produce not through the wire rod of spheroidising as raw material, through a spheroidising, pass through cold extrusion shaped step after the blanking again, with blanking wire rod extrusion modling packaged tube blank, in cold extrusion shaped process, go out the central bore and the surperficial conical surface, then the pipe box central bore is made screw thread and ditch, groove, cut open the lamellar body of at least two equal portions again, pack the shipment step at last, the angle pin casing tube that processes is packed shipment.

Described multi-location cold extruding forming machine adopts the cold extrusion shaped machine of six merit positions, and it is located merit position, extruding gradient simultaneously by leveling merit position, leveling merit position, extruding gradient successively to the blanking wire rod and locatees merit position, extruding gradient simultaneously extrusion deep hole merit position, extruding gradient are carried out cold extrusion shaped processing in through hole merit position simultaneously simultaneously.Like this can be progressively to the blank extrusion modling that stretches, mold the conical surface of outside and the through hole and the conical surface of the inside, all disposable finishing can reduce wear, and can keep high-speed production efficiency simultaneously, reduce cost.

Described extruding gradient is located simultaneously in the merit position and earlier the sleeve pipe blank is squeezed out the big gradient conical surface, locatees simultaneously in the merit position in next extruding gradient again, and the big gradient conical surface with the sleeve pipe blank is squeezed into the relatively little gradient conical surface again, and the sleeve pipe blank is elongated.The density and the intensity on angle pin casing tube surface can be improved like this, the fineness of the conical surface can be fully guaranteed simultaneously.

Described sleeve pipe carries out refine processing with lathe before the system screw thread, comprise and scrape the hole step, the pulling eye step, the big plane of car step, turning and chamfering, tack step, degree of moving back, car arc chord angle and cut the groove step, degree of moving back and arc chord angle step in the car, adopt instrument lathe or numerically controlled lathe to process, and selectivity is handled as required, some flaws that may exist at extrusion forming process middle sleeve blank with further elimination.

The dish circle that passes through spheroidising that described wire rod adopts steel plant to buy is expected as raw material, carried out a spheroidising in the past earlier in blanking, make the blanking wire rod before processing, keep softer state, be convenient to cold extrusion shaped processing, and the wearing and tearing of minimizing mould, and reduce stub bar and material tail, conservation.

Compared with prior art, the invention has the advantages that: 1) adopted wire rod dish raw material to replace rod iron, wire gage on the wire rod dish can reach 2000 kilograms/dish, and rod iron is 20 kilograms/, so, stub bar material tail still less in making process, patented method in the background technology, wastage of material can reach 20%, and the application's method has only 2%, conservation reduces cost more; 2) adopt the multi-location cold extruding forming machine to carry out moulding, process velocity can reach 60/minute, and the patented method process velocity in the background technology can only obtain 6-10/minute, 3) original arts demand manual operations, and new technology one-shot forming is a full-automatic molding, so the production efficiency of the application's method is more increased, can reduce production costs widely; 4) the application's method need not twice nodularization and high frequency treatment step, is at most a nodularization, has reduced processing step, simultaneously, greatly reduces energy consumption, reduces process time, has improved production efficiency.

Description of drawings

Fig. 1 is the flow process chart of invention;

Fig. 2 is the cold extrusion shaped process schematic diagram of six merit positions.

The specific embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

Illustrate as Fig. 1-2, a kind of production method of angle pin casing tube, it adopts expecting as raw material through the wire rod dish circle of spheroidising of steel plant's production, only carry out a spheroidising, make its deliquescing, be fit to processing, reduce die wear, carry out blanking again, and process next coming in order step:

The extrusion modling step adopts the multi-location cold extruding forming machine that wire rod is processed, and the multi-location cold extruding forming machine adopts the cold extrusion shaped machine of six merit positions, extrusion modling packaged tube blank;

The cold extrusion shaped machine of six merit positions is located merit position, extruding gradient simultaneously by leveling merit position, leveling merit position, extruding gradient successively to the blanking wire rod and is located merit position, extruding gradient simultaneously extrusion deep hole merit position, extruding gradient are carried out cold extrusion shaped processing in through hole merit position simultaneously simultaneously, detailed process is referring to Fig. 2, and wherein arrow is illustrated in the main machined surface in each merit position.Like this can be by the multi-location cold extruding forming machine with wire rod blanking one-shot forming packaged tube blank, efficient height.Certainly, the multi-location cold extruding forming machine also is confined to six merit positions, can be five merit positions, seven merit positions, suitably adjusts in technological process.

Push gradient in the first time and locate simultaneously in the merit position, earlier the sleeve pipe blank is squeezed out the big gradient conical surface, push gradient in the second time again and locate simultaneously in the merit position, the big gradient conical surface with the sleeve pipe blank is squeezed into the relatively little gradient conical surface again, and the sleeve pipe blank is elongated.Make the blanking wire rod like this in the manufacturing processing of sleeve pipe blank, by cold extrusion method, underhardening has improved the intensity of angle pin casing tube again, and improves its surface smoothness.

In the time of necessary, the sleeve pipe blank can be carried out refine processing with lathe, wherein increase step and scrape the hole, adopt instrument lathe or numerically controlled lathe and drill bit to scrape the hole and handle; Pulling eye carries out pulling eye with instrument lathe or numerically controlled lathe; The big plane of car, with instrument lathe or numerically controlled lathe that the big bottom face car of sleeve pipe blank is flat; Turning and chamfering, tack, with instrument lathe or numerically controlled lathe with the sleeve pipe blank near big end periphery turning and chamfering, and flat to the small end head car of sleeve pipe blank; Degree of moving back, car arc chord angle and cut groove become to meet the conical surface of precision with instrument lathe or numerically controlled lathe with the male cone (strobilus masculinus) car of sleeve pipe blank, go out the R angle at the small end car, go out annular groove at big end conical surface car; Degree of moving back and arc chord angle in the car adopt instrument lathe or numerically controlled lathe, the inner conical surface on the car small end centre bore, and precision up to specification, and carry out chamfering.Above step, carrying out selectivity according to the sleeve pipe blank quality of producing in the cold extrusion shaped process uses, some defective flaws that the sleeve pipe blank eliminated produce in the various extrusion processes, concrete any refine procedure of processing need to use, and adjust according to the production actual conditions.Specifically see Fig. 1, arrow is illustrated in the processing face in the step.

Make screw thread and produce ditch and groove with relevant device again at the sleeve pipe centre bore with the tapping machine.

Casing mill is cut the lamellar body that cuts open at least two equal portions with milling machine then.

Pack shipment at last, the taper thimble that processes is packed shipment.

Claims

1. the production method of an angle pin casing tube, it is characterized in that adopting steel plant produce not through the wire rod of spheroidising as raw material, through a spheroidising, pass through cold extrusion shaped step after the blanking again, with blanking wire rod extrusion modling packaged tube blank, in cold extrusion shaped process, go out the central bore and the surperficial conical surface, then the pipe box central bore is made screw thread and ditch, groove, cut open the lamellar body of at least two equal portions again, pack the shipment step at last, the angle pin casing tube that processes is packed shipment.

2. production method according to claim 1, it is characterized in that described cold extrusion shaped step adopts the cold extrusion shaped machine of multi-functional position, it is located merit position, extruding gradient simultaneously by leveling merit position, leveling merit position, extruding gradient successively to the blanking wire rod and locatees merit position, extruding gradient simultaneously extrusion deep hole merit position, extruding gradient are carried out cold extrusion shaped processing in through hole merit position simultaneously simultaneously.

3. production method according to claim 2, it is characterized in that described extruding gradient is located in the merit position simultaneously earlier squeezes out the big gradient conical surface to the sleeve pipe blank, locate simultaneously in the merit position in next extruding gradient again, the big gradient conical surface with the sleeve pipe blank is squeezed into the relatively little gradient conical surface again, and the sleeve pipe blank is elongated.

4. production method according to claim 3 is characterized in that the wire rod that described wire rod employing dish circle is expected.

5. production method according to claim 4, it is characterized in that described sleeve pipe carries out refine processing with lathe before the system screw thread, comprise and scrape the hole step, the pulling eye step, the big plane of car step, turning and chamfering, tack step, degree of moving back, car arc chord angle and cut the groove step, degree of moving back and arc chord angle step in the car adopt instrument lathe or numerically controlled lathe to process, and selectivity are handled as required.