CN2115847U - Hydraulic ring channel cold riveting machine - Google Patents

Abstract

The utility model relates to a hydraulic ring channel cold riveting machine for the cold riveting art, comprising a power cylinder, a push-out oil cylinder, a quick releasing rivet head and a grab handle. The quick releasing rivet head is composed of a rivet barrel, a cone barrel and a jaw; the power cylinder is driven to displace in axial direction by the cone barrel, and a rivet rod is tightly clamped by the jaw; the cone barrel displaces continuously, and relative extrusion friction between a rivet sleeve and a rivet head is generated. Part of the rivet sleeve is permanently embedded in the annular groove of the rivet rod, and thus the workpiece is riveted. The utility model has the advantages of good riveting quality, high riveting speed, energy saving, noiselessness and pollution-free.

Description

Hydraulic ring channel cold riveting machine

The utility model relates to the hydraulic pressure annular groove cold riveting rifle that uses in a kind of riveting process.

The domestic structural member riveted joint of present China is made and is prolonged with traditional hot riveting technology always, and hot riveting is that the jarring of using the generation of air pressure gun head is with rivet head jumping-up, moulding, with the cooled convergent force clamping work pieces of rivet with after the rivet heating.Its shortcoming is that hot riveting must be heated rivet with coke, with compressed air is power, the working site is seriously polluted, noise is deafening, have a strong impact on operating personnel's physical and mental health, nail of hot riveting riveting in average 30 seconds, inefficiency, the cooperative operation personnel are many simultaneously, and must have higher heating, riveting technology level could guarantee riveting quality.Adopted advanced cold riveting technology the latter stage eighties abroad.

It is power at normal temperatures with hydraulic oil that the purpose of this utility model is to provide a kind of, the hydraulic pressure annular groove cold riveting rifle that workpiece is riveted into one with the rivet that has groove and riveting cover.

Hydraulic pressure annular groove cold riveting rifle of the present utility model comprises actuator cylinder, ejects oil cylinder, quick-release die and lever, actuator cylinder is made up of cylinder body, cylinder cap, piston and buffer gear, ejecting oil cylinder is cylinder body with the piston of actuator cylinder, and the valve piston that promptly ejects oil cylinder is installed in the cavity at actuator cylinder piston center.The quick-release die is positioned at actuator cylinder one end, it comprises riveting tube, awl tube, claw, stop collar and back-moving spring, riveting tube and awl tube flexibly connect with the cylinder cap and the piston rod of actuator cylinder respectively, and the awl tube is installed in the riveting tube, and claw closes with the inner conical surface cunning of awl tube, when the awl tube moves vertically, back-moving spring forces claw along awl tube inner conical surface radial contraction rivet to be clamped, and the claw front end is a stop collar, and its rear end is a back-moving spring, riveting nozzle door is cambered surface, is processed with ring-shaped groove on the clamping area of claw.Lever is installed on the actuator cylinder cylinder body, and the electric switch of hydraulic oil pipeline and control solenoid directional control valve is housed in the lever.Operation principle of the present utility model is: hydraulic pressure annular groove cold riveting rifle is connected with hydraulic power unit, under electrical control, pressure oil enters the actuator cylinder ante-chamber, promoting piston moves backward, the awl tube that is connected with piston with after move, under the effect of back-moving spring, force claw along boring tube inner conical surface radial contraction until the crimping rivet afterbody, at this moment produce relative motion between awl tube and the riveting tube, with rivet, riveting cover and by the riveting parts pretension, the riveting tube continues relative motion with the awl tube, because riveting tube internal diameter overlaps external diameter less than riveting, thus under powerful system oil pressure effect, the riveting tube with produced relative extrusion friction between riveting is overlapped, make the riveting cover produce permanent metal flow, a riveting cover part is permanently embedded in the cannelure of rivet bar, and this moment, system oil pressure continued to raise, until rivet is broken from the undergauge incision.After rivet is broken, make pressure oil enter the actuator cylinder back cavity by solenoid directional control valve, promote piston and the reach of awl tube, claw unclamps clamped rivet bar, meanwhile, it is the oil cylinder that ejects of cylinder body that pressure oil also enters with the piston of actuator cylinder, and promotes its valve piston and travel forward, the rivet bar that piston rod will remain in the claw ejects the riveting gun mouth, and all riveting process finishes.

The utility model has the advantages that: 1, riveting quality is good, can produce the pretightning force of 88000N during riveted joint, and it is seamless that sheet material is riveted under the pretightning force effect, and have extremely strong anti-vibration, anti-shear ability, improved the service life of riveting parts.2, riveted joint speed is fast, gets final product nail of riveting 3 seconds, and its production efficiency is 8-10 times of traditional hot riveting technique.3, cold riveting technology need not heat, and saves the energy, non-environmental-pollution, and alleviated labor intensity of operating personnel greatly.4, the work noiselessness helps operating personnel's physical and mental health.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is rivet, riveting cover and riveting parts assembling schematic diagram.

Embodiment: referring to Fig. 1,2, the utility model comprises actuator cylinder, ejects oil cylinder, quick-release die and lever.Actuator cylinder comprises cylinder body 18, cylinder cap 16, piston 15, sealing 17 and buffer gear.Cylinder body 18 front openings, opening part is equipped with cylinder cap 16, and cylinder cap 16 is fixing by special snap ring 23.Pressurized gland bush are adopted in sealing 17, do not have leak and in let out.Buffer gear is the double buffering safety device, the one, and at cylinder body 18 and piston 15 end processing buffer grooves and buffering boss, the 2nd, be provided with buffer bar 19, guarantee the complete machine stable working.Piston 15 and valve piston 14 compositions eject oil cylinder, and valve piston 14 is installed in the cavity at piston 15 centers, and this cavity is communicated with the actuator cylinder back cavity, when pressure oil enters the actuator cylinder back cavity, enters the cavity at piston 15 centers simultaneously, and valve piston is promoted forward.The quick-release die comprises riveting tube 10, awl tube 3, claw 4, back-moving spring 6, top cover 5 and stop collar 1,2, and riveting tube 10 materials are Cr12MnV, and awl tube 3 and claw 4 materials are 30CrMnSi.Awl tube 3 is installed in the riveting tube 10, the piston rod of awl tube 3 and piston 15 is to be threaded, and hold out against by screw, riveting tube 10 flexibly connects by semi-ring formula quick-release mechanism and the cylinder cap of being made up of two semi-rings 12, the collar 13 and snap ring 11 16, two semi-rings 12 that have a cannelure are stuck on the end face of riveting tube 10 and cylinder cap 16 the two are connected, the collar 13 is enclosed within two semi-ring 12 outsides and is fixed, and it is moving that snap ring 11 is stuck on the riveting tube 10 the restriction collar 13 strings.Claw 4 is made up of three lobes, is processed with the cannelure consistent with rivet bar on the clamping area of every lobe claw, so that crimping rivet bar more firmly.Claw 4 cooperates with awl tube 3 inner conical surfaces, claw 4 front ends are stop collar 1 and 2, and its rear end is top cover 5, back-moving spring 6, baffle plate 8 and the sealing ring 9 that is enclosed within on the intermediate sleeve 7, after rivet is broken, awl tube 3 resets under the pressure oil effect, and 4 of claws reset under spring 6 effects.Riveted joint workpiece difference, employed rivet, riveting cover size is also inequality, for the ease of riveting various workpiece fast, be provided with the quick-release die of different size, when changing die, only need in order snap ring 11, the collar 13 and semi-ring 12 to be taken off, riveting tube 10 promptly separates voluntarily with cylinder cap 16, screws out and holds out against screw, from piston 15, revolve slower conical tube 3, only need 5 minutes whole dies promptly all to change.Lever comprises shell 21, oil pipe line 22 and electric switch 20.Riveting gun integral body is pistol type.Among Fig. 2: 24 is that rivet, 25 is that workpiece, 26 is the riveting cover.

Claims (3)

1, a kind of hydraulic pressure annular groove cold riveting rifle, it is characterized in that it comprises actuator cylinder, eject oil cylinder, quick-release die and lever, described actuator cylinder comprises cylinder body 18, cylinder cap 16, piston 15 and buffer gear, the described oil cylinder that ejects is that piston 15 with actuator cylinder is a cylinder body, its valve piston 14 is installed in the cavity at piston 15 centers, described quick-release die is positioned at actuator cylinder one end, it comprises riveting tube 10, awl tube 3, claw 4, stop collar 1,2 and back-moving spring 6, riveting tube 10 and awl tube 3 flexibly connect with the cylinder cap 16 of actuator cylinder and the piston rod of piston 15 respectively, awl tube 3 is enclosed within the riveting tube 10, claw 4 closes with the inner conical surface cunning of awl tube 3, claw 4 front ends are stop collars 1,2, its rear end is a back-moving spring 6,10 mouthfuls of doors of riveting tube are cambered surface, be processed with cannelure on the clamping area of claw 4, described lever comprises shell 21, oil pipe line 22 and electric switch 20.

2, hydraulic pressure annular groove cold riveting rifle according to claim 1 and 2, the buffer gear that it is characterized in that described actuator cylinder is the double buffering safety device, it comprises dashpot and the buffering boss and the buffer bar 19 of cylinder body 18 and piston 15 ends.

3, hydraulic pressure annular groove cold riveting rifle according to claim 1 and 2 is characterized in that its riveting tube 10 of described quick-release die is that cylinder cap 16 by the semi-ring formula quick-release mechanism be made up of semi-ring 12, the collar 13 and snap ring 11 and actuator cylinder flexibly connects; The piston rod of its awl tube 3 and piston 15 holds out against with screw to be threaded.

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