CN2131625Y

CN2131625Y - Arc bending apparatus for thin tubes

Info

Publication number: CN2131625Y
Application number: CN 91217500
Authority: CN
Inventors: 楼滨伟; 廖培林
Original assignee: Institute Of Construction Science 12th Engineering Bureau Ministry Of Water Resources And Electric Power
Current assignee: Institute Of Construction Science 12th Engineering Bureau Ministry Of Water Resources And Electric Power
Priority date: 1991-06-27
Filing date: 1991-06-27
Publication date: 1993-05-05
Anticipated expiration: 2001-06-27

Abstract

The utility model relates to an arc bending apparatus for a thin-wall tube, adopting the stretch bending principle of a core rod to prevent the thin-wall tube from creases and collapse in the process of bending an arc. The utility model is composed of a core mold, a rotating disk, a clamping block, the core rod, a tube stopping mechanism, a transmission mechanism, a motor, and a support frame, wherein, the core mold is a screw bolt which is fixedly connected with the rotating disk in the perpendicular direction; the rotating disk is provided with a fixed stake; one surface of the clamping block is provided with a concave groove which is wedged between the core mold and the fixed stake; the bracing bar of the tube stopping mechanism and the vertical bar of the 7-shaped bar of the tube stopping mechanism are connected with the plane of the support frame through axle pins; the external side of the transversal bar of the 7-shaped bar is connected with a moving block through a dovetail groove. The utility model which can carry out arc bend for various thin-wall tubes has the advantages of high rate of finished products and materials saving.

Description

Arc bending apparatus for thin tubes

The utility model belongs to mechanical pressure bend pipe processing technique field.

During the free bend of well-known light-wall pipe, along with the carrying out of BENDING PROCESS, it is flat that its section configuration will become, and then form ellipticity or other shapes, when bigger crooked of deformation extent, produces fold sometimes in the inboard, occurs subsiding in the part sometimes.In order to address the above problem, adopt at present and tamp fine sand or rosin in the pipe, carry out bending again, but this method can't solve fully, and so crooked working strength of workers is big, efficient is low, and crooked simultaneously curvature is subjected to bigger restriction.

The purpose of this utility model is the circular arc bending apparatus of a kind of light-wall pipe of design, employing has the stretch bending principle of plug, rotate light-wall pipe curved on core with core, overcome pipe section distortion in the tube bending process, fold and subsiding, and alleviate working strength of workers, enhance productivity.

This device is made up of core, compact heap, plug, rotating disk, retaining pipe mechanism, transmission mechanism, motor and support.Core is a bolt, and the end diameter of bolt equals to want the interior diameter of bent arc shape, and its thread groove is with consistent by the profile of bend pipe, promptly by half of the sub-section configuration of bend pipe, and its lead; Be pitch, determine according to product needed that it is vertical with rotating disk that the lower end of core is fixed on the center of rotating disk, and a spud pile is arranged above the rotating disk, rotating disk is connected by clutch with transmission mechanism.Compact heap is a wedge, one side is fluted, and tooth is arranged in the groove, and the section configuration of its groove is with half is identical by the bend pipe section configuration, it be wedge between core and the spud pile above the rotating disk, initiating terminal that will bend pipe is clipped between the groove of the thread groove of core and compact heap and clips.Retaining pipe mechanism is made up of a strut and " 7 " font bar and active block stop, the adjustable in length of strut, one end is connected with the support plane by shaft tip, the cross bar of " 7 " font bar can be withstood in the other end, the outside of cross bar has dovetail groove to be connected with active block stop, and promptly active block stop can be along the cross bar activity.The montant adjustable in length of " 7 " font bar, its end is connected with the support plane by shaft tip, and therefore retaining pipe mechanism can rotate at upper edge, support plane shaft tip.The active block stop outside is fluted, and its groove shapes is with half is identical by the section configuration of bend pipe.Plug has the shaping plug, spherical plug, board-like plug of lamination and cable type plug, this device adopts the shaping plug, and one is connected with a long reinforcing bar by screw thread, and hemispherical is made in the other end, its curvature and want the curvature of bent arc shape to be consistent, its thickness is slightly less than by the endoporus of bend pipe.Plug and reinforcing bar penetrate by in the bend pipe during bend pipe, and the afterbody of reinforcing bar exposes that pipe is outer to be fixed on the support, the hemispherical curved surface of plug with contacted by the inner wall outside in the initial knee of bend pipe.By the initial head-clamp of bend pipe between core and compact heap, tangent by bend pipe and core, to keep off pipe mechanism then and regulate and fix, and make by bend pipe to lean against in the outside groove of active block stop, the pipe of sweep does not become a lead angle with horizontal plane (being the support plane) all the time.Starter motor, core clockwise rotates, and is just curved on core by bend pipe, speed (pitch) with helical pitch when core rotates descends, when by bend pipe all after to core, plug just breaks away from pipe, withdraws from curved good pipe again and has just become a hollow spring.Shape as requested (being arc length) cuts turn and gets final product.For example curved circle as long as will bend good hollow spring, is sawed a cutter and has just been become a plurality of circles.

The utility model is simple in structure, and is easy to use, utilizes not fold of these various circular arcs that install crooked light-wall pipe, do not subside, and improves the quality of products and yield rate, alleviates working strength of workers simultaneously, saves material, raises the efficiency.Fig. 1 is the utility model structural representation.

Description of drawings, in the accompanying drawing 1, the 1st, core and rotating disk 2 central vertical are affixed, and rotating disk 2 is connected by clutch with transmission mechanism.The 3rd, compact heap, one side is fluted, and the wedge shape of tooth is arranged in the groove, be wedge between spud pile 4 and core 1, initial head-clamp that will bend pipe 7 is tight, spud pile 4 is a certain positions that are fixed on above the rotating disk 2.The 5th, plug, one head and reinforcing bar 6 are by being threaded, the hemispherical identical with the curvature of wanting bent arc made in the other end, plug 5 and reinforcing bar 6 all penetrate by in bend pipe 7, the snaphead of plug 5 places just by the initial knee of bend pipe 7, and the afterbody of reinforcing bar 6 exposes manages outer being fixed on the support 12.The 8th, " 7 " font bar, its montant length can be regulated, and tail end is connected with support 12 planes by shaft tip 13, there is dovetail groove in the cross bar outside of " 7 " font bar 8, be connected with active block stop 11 by dovetail groove, there is a groove in the outside of active block stop 11, by bend pipe 7 along this groove around to core 1.The 9th, strut, the cross bar of " 7 " font bar 8 is lived on the one crown, and the other end is connected with support 12 planes by shaft tip 10.

Embodiment, this device are used for curved circle, are 19 millimeters by bend pipe diameter (external diameter), and tube wall is 12 millimeters welded pipe, curve internal diameter and be 57 millimeters circle.Diameter is 55 millimeters (because this material has 2 millimeters resilience) at the bottom of the core of this device, and the lead of core (pitch) is 20 millimeters, and thread groove is semicircle, and the radius of groove is 95 millimeters.The groove of compact heap also is semicircle, and its radius is 95 millimeters, and tooth is arranged in the groove.Plug adopts the shaping plug, diameter is 155 millimeters, length is 150 millimeters, one of plug is connected with a reinforcing bar with screw thread, and hemispherical is made in the other end of plug, penetrates simultaneously by in the bend pipe, the reinforcing bar afterbody exposes manages outer being fixed on the support, the hemispherical circular arc head of plug is in just by the initial crooked position of bend pipe, and the initial head-clamp of pipe regulates retaining pipe mechanism and fixing then between core and compact heap.Actuating motor, core and rotating disk clockwise rotate, and on core, core and rotating disk descend with the speed of helical pitch (pitch) with pipe, last pipe is all around to core, plug just breaks away from by bend pipe, and the pipe of backing off and winding promptly becomes a multi-turn hollow spring, again one side of spring is cut, promptly become a plurality of circles, this circle has been exactly the circle of standard one by one through suitable shaping and welding.Its yield rate height is saved material, reduces working strength of workers, and efficient improves 2～3 times.

Claims

1, a kind of circular arc bending apparatus of light-wall pipe is by core, rotating disk, compact heap, plug, retaining pipe mechanism, transmission mechanism, motor and support are formed, it is characterized in that core (1) is a bolt, the end diameter of bolt equals to want the interior diameter of bent arc shape, its thread groove is with consistent by the profile of bend pipe, core (1) is vertical affixed with rotating disk (2), one spud pile (4) is arranged on the rotating disk (2), rotating disk (2) is connected by clutch with transmission mechanism, compact heap (3) one side is fluted, tooth is arranged in the groove, its groove section configuration is with half is identical by the section configuration of bend pipe (7), wedge is between core (1) and spud pile (4), clamp by the initial head of bend pipe (7), (5) one of plugs are hemisphericals, other end and reinforcing bar (6) are threaded, and retaining pipe mechanism is " 7 " font bar (8), and active block stop (11) and strut (9) are formed.

2, the circular arc bending apparatus of a kind of light-wall pipe according to claim 1, it is characterized in that, plug (5) and reinforcing bar (6) all penetrate by in bend pipe (7), the hemispherical curved surface of plug (5) with contacted by the inner wall outside in the initial knee of bend pipe (7), the afterbody of reinforcing bar (6) passes by the fixed outside of bend pipe (7) on support (12).

3, the circular arc bending apparatus of a kind of light-wall pipe according to claim 1, it is characterized in that, the cross bar outside of " 7 " font bar (8) has dovetail groove to be connected with active block stop (11), the active block stop outside is fluted, the montant of strut (9) and " 7 " font bar (8), its length all can be regulated, and one is connected with (13) plane with support (12) by shaft tip (10), and the cross bar of " 7 " font bar (8) is withstood in the other end of strut (9).