CN2164554Y - Cold bending experiment machine for reinforced bar - Google Patents

Abstract

The utility model provides a cold bending test machine for reinforced bars. The top end of a piston rod of a hydraulic jack is provided with a punching seat stacked with a punching head; a base and a cross beam are connected through four vertical columns; the middle of the cross beam is provided with two support roller seats whose one end forms loose joint with a threaded rod whose the other end is connected with an adjusting hand wheel, and the other end of the support roller seats is provided with a support roller shaft whose outer part is sheathed with a support roller cylinder whose periphery is provided with an arc groove; the support roller seats are provided with an indicating needle; an upstroke switch controls an electromagnetic reversing valve. The machine has simple structure and convenient operation; a test part is up-bending type, and the distance between the bend angle and the support roller cylinder can be adjusted and indicated; the utility model can bend the reinforced bar whose diameter is between 8 millimeters and 40 millimeters or other metallic material, and the grade of the reinforced bar is between the first grade and the fourth grade.

Description

Cold bending experiment machine for reinforced bar

The utility model belongs to the reinforcing bar cold bend test technical field in the building installation engineering.

The ordinary test chamber is nearly all adopted universal testing machine to carry out, but special-purpose drift and anchor clamps must be arranged the cold bend test of reinforcing bar and other metal material at present.And drift is outstanding divinatory symbol formula, and the position is higher, thus drift is installed and mobile branched roller seat work heavy, operation inconvenience often needs just can finish more than two people large diameter reinforcing bar cold bend test of high strength, security is relatively poor, often has the test specimen brittle failure to fly out to hurt sb.'s feelings or the accident that smashes equipment takes place.

The purpose of this utility model is to provide a kind of simple in structure, roll spacing from can regulating, have the indication of a roller clear distance and angle of bend according to testing requirements, red seat be plug-in type, drift for repeatedly put formula, piston has automatic whereabouts to reset, be provided with the curved formula test unit of going up of safety cage, lowering energy-saving easy and simple to handle.

This device is by oil hydraulic system, crossbeam, and a roller system, indication mechanism, drift, red seat column and support are formed.Wherein oil hydraulic system is by motor, oil pump, fuel tank, oil pipe line, unidirectional intercepting valve of solenoid directional control valve and hydraulic jack are formed wherein, and piston is divided into upper cylinder half and following cylinder with oil cylinder, the motor-driven oil pump, oil in the fuel tank enters the following oil cylinder of hydraulic jack through oil pipe line and solenoid directional control valve, and the oil of upper cylinder unidirectional intercepting valve of process and oil pipe line and solenoid directional control valve are got back in the fuel tank, and the piston of hydraulic jack rises; The collision pointer is run into upper limit position switch, then solenoid directional control valve commutation, and the oil in the fuel tank enters upper cylinder through oil pipe line, solenoid directional control valve and unidirectional intercepting valve, and the oil of oil cylinder is got back to fuel tank through the oil pipe line solenoid directional control valve down, the piston of hydraulic jack descends.The control line of solenoid directional control valve is received on the upper limit position switch.Piston rod stretches out the support end face, and gasket ring and collision pointer are equipped with in the piston rod top, and gasket ring has the center pit red seat to be inserted on the center pit, repeatedly puts drift on the punch holder.It is parallel with piston axis that mark post is housed on the end face of support, and upper limit position switch is equipped with on mark post top, can move up and down the position along mark post, and lower position switch is equipped with in the mark post bottom.Also have four root posts on the end face of support, affixed by nut and support, crossbeam is arranged at the top of column also is affixed by nut.Crossbeam is to be spliced by the head plate of two joist steel by the termination, there is nut bore at the center of head plate, (in the abdomen) dress roller system in the middle of the crossbeam, two branched roller seats can be in crossbeam move left and right, one of branched roller seat with active a connection of screw rod, the other end of screw rod is connected with the outer control hand wheel of crossbeam end by the center nut hole of head plate.The head in addition of branched roller seat is equipped with a roll shaft, is with a roller in a roll shaft outside, and a roller middle part periphery has a circular groove, and test specimen two is supported in groove and can not slided partially, reduces the friction of fulcrum simultaneously.Pointer also is housed on branched roller seat, points to horizontal staff above the crossbeam, indicate the clear distance between two rollers, the rotatable as requested control hand wheel of a roller clear distance is realized.Turnover safety cage is equipped with on crossbeam top.Drift be one cylindrical, in order to adapt to the reinforcing bar requirement of different specification of clod wash and diameter, the diameter of its drift is also different, the drift of this device adopts cylinder or pipe nested form so both can save material, and do not weaken the drift load-bearing capacity, drift is that the position that repeatedly is placed on the red seat is low, and is easy to loading and unloading.Punch diameter is according to the description of reinforcing bar (test specimen) during test, strength grade or welding, the cold working situation is selected for use and is regulated the stroke of the distance (the horizontal staff indication is arranged) of a roller by required angle of bend adjustment piston according to drift and bar diameter, it is the position of the upper limit position switch on the mark post, choosing drift repeatedly is placed on the red seat, the center of test specimen is placed on the drift, two of test specimen is bearing in the groove of roller, starter motor, oil in the fuel tank enters the following oil cylinder of hydraulic jack through oil pipe line and solenoid directional control valve, piston rises, the oil of upper cylinder is got back in the fuel tank through unidirectional intercepting valve oil pipe line and solenoid directional control valve, drift rises, test specimen is curved to upper punch, when test specimen bends to the angle of requirement, collision pointer on the gasket ring is run into upper limit position switch, then solenoid directional control valve commutation, be that oil in the fuel tank enters upper cylinder through oil pipe line and solenoid directional control valve and unidirectional intercepting valve, and the oil of oil cylinder is got back to fuel tank through oil pipe line and solenoid directional control valve down, drift descends with piston, falls back to the origin-location, and the collision pointer is run into lower position switch, motor shuts down, and finishes test.

Advantage of the present utility model, simple in structure, volume is little, but one man operation's test, drift is a cylinder pipe sleeve type, and as long as repeatedly be placed on the red seat, therefore installs very convenient and safe.The formula that is bent into of test specimen, distance can be regulated arbitrarily between its angle of bend and the roller, and indication is all arranged.Solenoid directional control valve and unidirectional intercepting valve are arranged in oil hydraulic system, and piston can automatic falling the after rise of certain speed reset.The scope that this device adapts to test specimen is big, can carry out cold bend test to the I～ⅣJi Gang muscle of 8-40 millimeter, and can be used as the cold bend test of other metal materials.

Description of drawings and embodiment, accompanying drawing 1 is a kind of front elevation of reinforcing bar cold bending test machine.1 is support among the figure, the 2nd, and solenoid directional control valve, the 3rd, hydraulic jack, the 4th, oil pipe, the 26th, unidirectional intercepting valve, the 21st, motor, the 22nd, oil pump; The 23rd, fuel tank, motor 21 drives oil pump 22, the oil inlet pipe of oil pump 22 feeds fuel tank 23, the flowline of oil pump 22 and solenoid directional control valve 2 oil-ins are communicated with, the oil return opening of solenoid directional control valve 2 is communicated with by oil pipe 4 and fuel tank 23, and following oil cylinder and unidirectional intercepting valve that solenoid directional control valve 2 also has two hydraulic fluid ports to link hydraulic jack 3 respectively by oil pipe 4 pass to upper cylinder by oil pipe 4.In the oil cylinder of hydraulic jack 3 piston is arranged, oil cylinder is divided into oil cylinder and upper cylinder down, piston rod stretches out the end face of support, the affixed gasket ring in the top of piston rod, gasket ring side are equipped with collision pointer 19, and a mark post 18 and piston rod line parallel are arranged on the end face of support 1, on the mark post 18 scale is arranged, upper limit position switch 17 is arranged at its top, can move up and down along mark post 18, and there is lower position switch 20 its underpart.The gasket ring center hole on piston rod top is inserted with red seat 6, be repeatedly to put drift 7 on it, also have four root posts 5 on the end face of support 1, affixed by nut and support, the top of column 5 is affixed by nut and crossbeam 13, crossbeam 13 is by two joist steel, be spliced with head plate 10 in its termination, there is a nut bore at the center of head plate 10, (in the abdomen) has two branched roller seats 16 in the middle of the crossbeam 13, can be in the middle of crossbeam 13 move left and right, 16 1 of branched roller seats and 9 active connections of screw rod, the other end of screw rod 9 is connected the center nut hole of head plate 10 and screw rod 9 screw-threaded engagement by the center nut hole of head plate 10 with the outer control hand wheel 8 of crossbeam 13 ends.A roll shaft 12 is equipped with in the other end of branched roller seat 6, and its outside is with a roller 11, and roller 11 a middle part periphery has circular groove.Also have pointer 15 on the branched roller seat 6, point to the horizontal staff 24 on the crossbeam 13.The 14th, test specimen, its center is on drift 7, and two is in the circular groove of a roller 11.There is safety cage 25 crossbeam 13 tops.

Accompanying drawing 2 is side views of a kind of reinforcing bar cold bending test machine, 1 is support among the figure, 5 is four columns, it connects support 1 and crossbeam 13, the 6th, red seat is inserted in the gasket ring center pit on piston rod top, repeatedly puts drift 7 on the red seat 6, and the piston rod adjacency erects mark post 18, upper limit position switch 17 is arranged at top, can move up and down the position along mark post 18, lower position switch 20,19th is arranged at mark post 18 bottoms, is contained in the collision pointer of gasket ring side, lifting along with piston rod, the collision pointer is along mark post 18 liftings, the 14th, reinforcing bar test specimen, the 16th, branched roller seat, a roll shaft 12 is equipped with in the bottom, its outside is with a roller 11, and a roller middle part periphery has a circular groove, also has pointer 15 on the branched roller seat 16, point to horizontal staff 24 above the crossbeam 13, there is safety cage 25 crossbeam 13 tops.

Claims (3)

1, a kind of reinforcing bar cold bending test machine is by oil hydraulic system, crossbeam, a roller system, indication mechanism, drift, red seat, column and support group line.It is characterized in that, oil hydraulic system is by motor (21), oil pump (22), fuel tank (23), oil pipe (4), solenoid directional control valve (2), hydraulic jack (3) and unidirectional intercepting valve (26) are formed, gasket ring and collision pointer (19) are equipped with in the piston rod top of hydraulic jack (3), the gasket ring center hole is inserted with red seat (6), repeatedly put drift (7) on the red seat (6), it is parallel with piston axis that mark post (18) is housed on the end face of support (1), upper limit position switch (17) is arranged at mark post (18) top, lower position switch (20) is arranged at the bottom, the control line of solenoid directional control valve (2) is received on the upper limit position switch (17), have four root posts (5) affixed by nut and support (1) on the end face of support (1), top and crossbeam (13) are affixed by nut.(in the abdomen) is equipped with a roller system in the middle of the crossbeam, and control hand wheel (8) is arranged outside its two ends, and safety cage (25) is equipped with on crossbeam (13) top.

2, a kind of reinforcing bar cold bending test machine according to claim 1, it is characterized in that, (16) one of branched roller seats and screw rod (9) loose joint, the other end of screw rod (9), the nut bore at head plate (10) center by crossbeam (13) is connected with control hand wheel (8), screw rod (9) and nut bore engagement, a roll shaft (12) is equipped with in the other end of branched roller seat (16), its outside is with a roller (11), propping up roller (11) middle part periphery has a circular groove, pointer (15) also is housed on the branched roller seat (16) points to the top horizontal staff (24) of crossbeam (13).

3, a kind of reinforcing bar cold bending test machine according to claim 1 is characterized in that, red seat (6) is inserted on the center hole of gasket ring, and drift (7) repeatedly is placed on the red seat (6).

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