CN2208459Y

CN2208459Y - Hydraulic pipe flaring and flanging machine

Info

Publication number: CN2208459Y
Application number: CN 94242676
Authority: CN
Inventors: 顾晓宁
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-10-08
Filing date: 1994-10-08
Publication date: 1995-09-27
Anticipated expiration: 2004-10-08

Abstract

The utility model relates to a hydraulic pressure flaring flanging machine for carry out the hem to the flaring end in the pipe fitting flaring is connected, make it become hem type flaring. The machine head of the machine comprises a bending pressure head and a forming pressure head, the end face of the bending pressure head is an inner conical surface, a cylinder is arranged in the center, the forming pressure head is a cone, the two pressure heads are fixed on a sliding block, the sliding block is connected with a piston rod through a sliding groove, and a hydraulic mechanism is provided with an oil way reversing rotary valve to realize the conversion between a positive oil circuit, a negative oil circuit and a no-load circuit of oil. The machine can implement double-layer flaring on the pipe fitting, compared with the existing single-layer flaring, the strength and the sealing performance of the flaring are improved, and the thinner pipe fitting can be selected, so that the material is saved.

Description

Hydraulic flaring and edge folding machine for pipes

The utility model relates to a kind of hydraulic tube piece enlarging folding brake, is the machinery of enlarging type joint connecting tube being implemented the operation of enlarging flanging.

The pipeline that the enlarging type pipe joint connected mode of pipe fitting has been widely used in fluid compression engine tools such as hydraulic machinery, gas compressor connects, and pipe fitting mostly is copper tube, and a pipe fitting is pegged graft with the conic pipe joint of enlarging and another pipe fitting, screws collar nut then.After the pipe fitting enlarging, the tube wall exhibition is thin, for remedying the deficiency that enlarging place intensity reduces, must select the purple pipe of thicker red copper for use, material is increased, and sealing is also relatively poor.If adopt flanging type enlarging (see figure 2), make enlarging place be folded into bilayer, the thickness of enlarging and elasticity are increased, sealing and intensity also can improve, thereby can select thin tubing for use, save material greatly.

The purpose of this utility model provides a kind of hydraulic tube piece enlarging folding brake, so that pipe fitting is implemented the operation of enlarging flanging.

The utility model hydraulic pressure enlarging folding brake is made up of hydraulic mechanism, head, anchor clamps, hydraulic mechanism comprises motor, oil pump and oil cylinder, anchor clamps contain clamping, head includes a bending pressure head and a contour squeeze, the end face of bending pressure head is an inner conical surface, cylinder of the umbo of inner conical surface, contour squeeze is a cone; Two pressure heads are fixed on the slide block, and slide block links to each other with piston rod by chute, and can slide along chute, and hydraulic mechanism is provided with the oil circuit reversing rotary valve, and the spool of rotary valve can rotate in 90 ° of angles by valve handle, realize the conversion between positive and negative, the idle loop of fluid.Before the cylindrical valve spool surface of this rotary valve has, in, three the radial slot L in back, M, N, anteposition groove and position, back groove respectively have an axial groove L-1 who extends to meta, N-1, the meta groove has two to extend forward and an axial groove M-2 who extends back, M-3, M-1, valve body has P, Q, A, four valve openings of B, valve opening P communicates with the meta radial slot M of spool, valve opening Q by vertical slot R with spool before, back radial slot L, N communicates, valve opening A and B communicate with N-2 groove and N-1 groove respectively for 45 ° by spool dextrorotation, or communicate with L-1 groove and M-1 groove respectively for left-handed 45 ° by spool.In the utility model pipe fitting enlarging folding brake, the central cylinder band tapering of bending pressure head is convenient to pressure head and is withdrawed from, and the interior cone angle * of bending pressure head is 10-15 °.

In the utility model, the conversion of two pressure heads can promote slide block by handle and slide and realize, wherein the bending pressure head at first with the pipe fitting enlarging and with flared end to the center bending, with contour squeeze flanging is overlapped into double-deck enlarging to the extruding of enlarging inwall then.The hydraulic circuit conversion realizes that by the valve handle operation of reversing rotary valve during forward, piston drives head and advances, pressure head work, in the time of oppositely, piston drives head and retreats, and pressure head withdraws from workpiece, when unloaded, handle is in meta, and fluid is from the direct oil sump tank of oil pump, and oil pump is in unloading condition, oil hydraulic system efficient is improved, and the fuel tank temperature rise is little.This machine can be implemented pipe fitting enlarging flanging easily, makes double-deck enlarging, enlarging intensity and sealing is improved, thereby can select slim pipe fitting for use, saves tubing, both has been applicable to copper tube, also can be used for the enlarging of mild steel seamless steel pipe.

Below in conjunction with description of drawings structure of the present utility model.

Fig. 1 is existing individual layer flared pipe fitting annexation schematic diagram.

Fig. 2 is a pipe fitting flanging type enlarging schematic diagram.

Fig. 3 is the utility model hydraulic tube piece enlarging folding brake structural representation.

Fig. 4 is that the A of annexation between slide block in the presentation graphs 3, chute and two pressure heads is to view.

Fig. 5 represents the original state of bending pressure head work.

Fig. 6 represents bending pressure head end-of-job state.

Fig. 7 represents the duty of contour squeeze.

Fig. 8 represents hydraulic circuit operation principle schematic diagram.

Fig. 9 is the sectional structure chart of oil circuit reversing rotary valve.

Figure 10 is the spool face expanded view.

Figure 11 is the contour structures schematic diagram of oil circuit switching valve.

Figure 12 is the B-B profile of Fig. 9.

Among Fig. 1, the 1st, flared pipe fitting, enlarging is the individual layer enlarging among the figure, the 3rd, conic pipe joint, the 2nd, attaching nut.Fig. 2 is a flanging type flared pipe fitting, and 1-1 is the flanging of enlarging among the figure.Fig. 3 represents the structure of this enlarging folding brake, is fixed with anchor clamps 9 and oil cylinder 4 on the frame 11, and piston 5 is arranged in the oil cylinder, and the groove 6 of living links to each other with piston rod, and pressure head 8 is fixed on the slide block 3, slide block 7 by handle 7-1 can be in chute 6 the slip (see figure 4).Be fixed with clamping 10 in the anchor clamps 9, the clamping front end is extended to horn mouth 10-1(and sees Fig. 5), there are fuel tank 14, motor 12 and oil circuit reversing rotary valve 13 in the below of frame, and rotary valve has valve handle 13-1.Two pressure heads 8 are housed on the slide block 3.From Fig. 4 as seen, bending pressure head 81 and contour squeeze 82 are by handle 7-1 push-and-pull slide block 7 interchangeable positions.Slide block two ends are equipped with alignment pin 15.By Fig. 5, Fig. 6 as seen, bending pressure head 81 has the inner conical surface 81-1 of indent and the cylinder 81-2 of projection, interior cone angle *=15 °, and cylinder 81-2 is tapering slightly, is convenient to pressure head and withdraws from.When pressure head when the direction of arrow is advanced, pipe end is squeezed along the conical surface to center slippage bending, when finishing, extruding becomes Fig. 6 state, withdraw from pressure head 81 this moment, driving handle 7-1 conversion pressure head again, as Fig. 7, contour squeeze 82 is started working, continue extruding to the direction of arrow, make flanging type enlarging as shown in Figure 2.The hydraulic principle is seen Fig. 8, and the spool of rotary valve 13 can rotate in three positions, left, center, right by valve handle 13-1 among Fig. 8, and among the figure, oil pump 16 is driven by motor 12 and extract fluid from fuel tank 14.Oil circuit P ' joins with oil pump 16, and oil circuit Q ' communicates with fuel tank, and oil circuit A ' and B ' communicate with the big chamber, a left side and the right loculus of oil cylinder 4 respectively.When rotary valve 13 was in illustrated meta, oil circuit P ' communicated with Q ', and A ' and B ' open circuit, and fluid is from the direct oil sump tank 14 of oil pump, the piston transfixion, and oil pump is in unloaded unloading condition.When rotary valve went to right position, oil circuit Q ' communicated with B ', and P ' communicates with A ', and this moment, fluid was sent into the big chamber, a left side of oil cylinder 4 from P ' through A, and piston 5 is promoted to the right, and pressure head 8 advances, the interior fluid of while oil cylinder right side loculus from oil circuit B ' through Q ' oil sump tank 14.When valve goes to a when position left side, oil circuit P ' communicates with B ', and A ' communicates with Q ', and fluid is sent into the right loculus of oil cylinder from P ', B ', promotes piston and is moved to the left, and pressure head 8 withdraws from workpiece, simultaneously the left chamber inner fluid greatly of oil cylinder from A ' through Q ' oil sump tank 14.The structure of reversing rotary valve 13 is seen Fig. 9,10,11,12.As shown, cylindrical valve spool 13-3 in the valve body 13-2 can rotate in three positions, left, center, right, 90 ° of angles by handle 13-1, spool can automatically reset by the effect of left and right two spring 13-4, and promptly handle does not have external force and does the time spent, and spool is in meta.Three radial slot L, M, N before, during and after spool has, anteposition groove and position, back groove respectively have axial groove L-1, a N-1 who extends to meta, the meta groove has two axial groove M-2, the M-3 and the M-1 that extend forward, valve body has P, Q, four valve openings of A, B, each hole respectively with Fig. 8 in corresponding joining of oil circuit P ', Q ', A ', B ', the inner in P hole communicates with the meta radial slot M of spool, and the Q hole is by vertical slot R and radial slot L, N communicate simultaneously (seeing Figure 12).The operation principle of rotary valve is seen Figure 10, among this figure spool is pressed 360 ° of planar developments, and P, Q, A, B are fixed four valve openings among the figure, spool is in meta among the figure, and this moment, P communicated by groove M-3 with Q, and A and B are in the room, fluid is in Light Condition from the direct oil sump tank of oil pump.When spool during to 45 ° of right rotations, hole A communicates with M-2, hole B communicates with N-1, fluid is gone into the M groove from the P hole, go into the big chamber of oil cylinder through the A hole by M-2, oil cylinder loculus fluid is gone into N-1 from the B hole, advance by Q hole oil sump tank pressure head by N, R, in like manner, after spool rotates to 45 ° left by meta, B hole and M-1, the A hole communicates with L-1, and fluid is pressed P → M → M-1 → B → oil cylinder loculus, again by the big chamber → A of oil cylinder → L-1 → L → R → Q fuel tank, pressure head retreats, realize thus oil circuit positive and negative, idle running between conversion.

Claims

1, hydraulic tube piece enlarging folding brake, form by hydraulic mechanism, head, anchor clamps, hydraulic mechanism comprises motor, oil pump and oil cylinder, and anchor clamps contain clamping, it is characterized in that head includes a bending pressure head and a contour squeeze, the end face of bending pressure head is an inner conical surface, cylinder of the umbo of inner conical surface, contour squeeze is a cone, two pressure heads are fixed on the slide block, slide block links to each other with piston rod by chute, and hydraulic mechanism is provided with the oil circuit reversing rotary valve.

2, hydraulic tube piece enlarging folding brake according to claim 1, before the cylindrical valve spool surface that it is characterized in that said oil circuit reversing rotary valve has, in, three the radial slot L in back, M, N, anteposition groove and position, back groove respectively have an axial groove L-1 to the meta extension, N-1, the meta groove has two to extend forward and an axial groove M-2 who extends back, M-3, M-1, valve body has P, Q, A, four valve openings of B, valve opening P communicates with the meta radial slot of spool, valve opening Q by vertical slot R with spool before, back two radial slot L, N communicates, valve opening A and B communicate with N-2 and N-1 groove respectively for 45 ° by spool dextrorotation, or communicate with L-1 groove and M-1 respectively by left-handed 45 °.

3,, it is characterized in that the central cylinder band tapering of bending pressure head according to the hydraulic tube piece enlarging folding brake of claim 1 or 2.

4, hydraulic tube piece enlarging folding brake according to claim 3 is characterized in that the interior cone angle * of bending pressure head is 10-15 °.