Bend pipe is used interior core
The present invention relates to a kind of interior core, relate in particular to a kind of bend pipe and use interior core.
At present domestic when producing bend pipe, the general core that adopts comprises core print and core bar, and when producing bend pipe, the blank pipe is under the promotion of hydraulic jack, and the blank pipe is along the core thick stick, and the angle of bend of core print carries out hole enlargement, and bending forms the blank of elbow gradually; But (for example: DN800-1400 wall thickness S >=70mm) is difficulty just when heavy construction needs the elbow of high temperature resistant, high pressure of heavy caliber, heavy wall; Because need to enlarge the blank caliber, the control temperature is 880 ℃～1020 ℃, under this temperature; The tensile strength of core print material descends rapidly; When pushing wall thickness＞70mm elbow, the phenomenon that the place of link of core print and core thick stick is torn often takes place, cause stop production to overhaul; Need another kind of method production, promptly the hot blank pipe of elder generation is heated to 900～1000 ℃ when producing bend pipe for this reason; Take out then in the mould that is placed on the head that bends, blank is pressed into elbow by the Pneumatic hydraulic oil cylinder; For avoiding tube wall to subside, blank pipe domestic demand is placed heavy supporting mould.Because supporting mould will be passed out while hot, therefore, " demoulding program " relies on the operator to beat, vibrate with iron rod, wooden stick fully, the some minutes time, inner mold and elbow thrown off; Its support force is inhomogeneous, and demoulding program is loaded down with trivial details, and labor strength is high, and demould time is long, and production efficiency is low, and the elbow inner surface is often wounded, and influences product quality.
Summary of the invention
To above-mentioned shortcoming, the object of the invention be to provide a kind of support force evenly, demoulding program simple and clear quick, can alleviate labor strength, the short bend pipe of demould time is used interior core.
Technology contents of the present invention is: a kind of bend pipe is used interior core, it is characterized in that it comprises supporting disk, ball arc dish, pulling force ball, Rotational Cylindrical, upper pin, lower bearing pin, upper spring and lower spring; Its both sides at supporting disk respectively are provided with an arc groove, and equidistance is provided with some grooves on the periphery of supporting disk; Top at ball arc dish is provided with a perforation; The pulling force bag is drawn together ball core and connecting rod, and connecting rod one end is connected with the ball core; The ball core of pulling force ball is installed in the arc groove of supporting disk, and ball arc disk cover is contained in the arc groove outside of supporting disk, and the connecting rod of pulling force ball passes from the perforation of ball arc dish; Respectively be provided with a Rotational Cylindrical in the groove on the periphery of supporting disk; Above Rotational Cylindrical, be provided with a shrinkage pool; In shrinkage pool, be provided with upper spring, upper pin is located in the shrinkage pool of upper spring outboard end, below Rotational Cylindrical, is provided with a through hole vertical with shrinkage pool; In through hole, be provided with lower spring, in the through hole at lower spring two ends, respectively be provided with a lower bearing pin.
The advantage that is compared with prior art had of the present invention is: after being placed on the present invention in the elbow material after the heating, when by the Pneumatic hydraulic oil cylinder blank being pressed into elbow, the support force of supporting disk is even; When taking out this bend pipe with interior core, only need that it is pulled out elbow and get final product, convenient and swift; Can alleviate the labor strength height thus, demould time is short, and the production efficiency of bend pipe is improved; Since need not be to beaing, the elbow inner surface is difficult for wounding, and product quality is improved.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is a use sketch map of the present invention.
A kind of bend pipe as depicted in figs. 1 and 2 is used interior core, it is characterized in that it comprises supporting disk 1, ball arc dish 2, pulling force ball 3, Rotational Cylindrical 4, upper pin 5, lower bearing pin 6, upper spring 7 and lower spring 8; Its both sides at supporting disk 1 respectively are provided with an arc groove 1.1, and equidistance is provided with some grooves 1.2 on the periphery of supporting disk; Be provided with a perforation 2.1 at the top of ball arc dish 2; Pulling force ball 3 comprises ball core 3.1 and connecting rod 3.2, and connecting rod 3.2 1 ends are connected with ball core 3.1; The ball core 3.1 of pulling force ball 3 is installed in the arc groove 1.1 of supporting disk 1, and ball arc disk cover 2 is contained in arc groove 1.1 outsides of supporting disk 1, and the connecting rod 3.2 of pulling force ball 3 passes from the perforation 2.1 of ball arc dish 2; Respectively be provided with a Rotational Cylindrical 4 in the groove 1.2 on the periphery of supporting disk 1; Above Rotational Cylindrical 4, be provided with a shrinkage pool 4.1; In shrinkage pool 4.1, be provided with upper spring 7; Upper pin 8 is located in the shrinkage pool 4.1 of upper spring 7 outboard ends; Below Rotational Cylindrical 4, be provided with a through hole 4.2 vertical, in through hole 4.2, be provided with lower spring 8, in the through hole 4.2 at lower spring 8 two ends, respectively be provided with a lower bearing pin 6 with shrinkage pool 4.1.
Operation principle of the present invention does; As shown in Figure 3ly after being interconnected by connecting rod 3.2 through attaching nut 10 with interior core 9, several bend pipes put into elbow material; After treating elbow material is pressed into bend pipe 11, should go out bend pipe with the inner core mode pulling by some bend pipes through traction.