CN2097710U - Grip device - Google Patents

Abstract

The utility model relates to a workpiece clamping device for welding cylinder-shaped workpieces. The end wall of the outer circle of an opening seam is provided with a conic decrescent convex part or an increasing hollow fastening head, the outer circle of the opening seam is sheathed with a fastening sleeve, and the fastening sleeve and the fastening head correspondingly slide. One inner circle end of the opening seam is provided with a hollow part or a convex part matched with the convex part or the hollow part of the fastening head, and the other outer circle end of the opening seam is provided with a flange with a welding electrical conducting wire. The relative sliding can be driven by an air pressure or hydraulic mechanism or a spring mechanism. The utility model has the advantages of strong and durable clamping force, reliable work and simple structure, and can be matched with portable welding tools and various welding machines.

Description

Grip device

The utility model relates to a kind of Workpiece clamping device that is used for the cylindrical workpiece welding.

In the known technology, on welded part, often need cylindrical workpieces such as welding screw, bearing pin, the outward appearance of these workpiece welding, geometric accuracy, coordinate position etc. directly affect product quality, so people are for the welding of bulk article, majority adopts Workpiece clamping device on welding machine or portable soldering set.Common structure has plenty of dop and is thin cylindrical shape and has open seam, relies on the distortion resilient clamp workpiece of himself, the nose circle suit annular helical spring outside open seam that also has.Yet because the wearing and tearing of dop internal diameter, cylindrical workpiece especially double-screw bolt manufacturing has reasons such as negative common difference value, and the formation chucking power is showing not enough even do not having, and except that influencing work quality, also causes the scaling loss of discharging between dop inwall and the workpiece.

The purpose of this utility model is to overcome the weak point of known technology and a kind of improved clamping device is provided.

The purpose of this utility model is achieved in that the dop that is shaped on conical gradually little protuberance or gradually big recessed sky on the wall of rounded ends outside open seam.Its cylindrical is set with cylindrical shape and cutting ferrule that can relative slip with dop, jacket wall one in rounded ends be shaped on recessed sky or protuberance with the said protuberance of dop or recessed Kongxiang coupling, another outer rounded ends be equipped with have welding electric conductors and can be for the fixing ring flange of usefulness.Said relative slip can be driven by air pressure or hydraulic mechanism, also can be formed by spring mechanism.

Air pressure or hydraulic mechanism are set in the forward and backward cylinder cap of cutting ferrule cylindrical by movable sealing, and front end housing is fixed with the pin and the dop that pass the cutting ferrule pilot hole, back cylinder cover is can be for the fixing flange dish type of usefulness, clamp cylinder barrel and the piston that is installed in the cutting ferrule cylindrical between lid, piston ring also is housed between piston and cylinder barrel forms.

Spring mechanism has welding electric conductors and for the fixedly ring flange and the adjusting nut of usefulness, the spring composition is housed between nut and the cutting ferrule by being shaped on screw thread at dop away from the outer rounded ends of protuberance or recessed sky, being equipped with on it.

Advantage of the present utility model: chucking power is strong and lasting, reliable operation; Be assigned on portable soldering set or the various welding machine, have wide range of applications; Simple in structure being easy to promoted.

Description of drawings:

Fig. 1 is a kind of air pressure or hydraulic-driven and the cross-sectional schematic that is in the clamping device of clamped condition;

Fig. 2 is the cross-sectional schematic of another kind of clamping device part;

Fig. 3 is that Fig. 1 side-looking is that the dop internal diameter is the profile of tooth schematic diagram;

Fig. 4 is the cross-sectional schematic that spring mechanism formed and be in the clamping device of clamped condition.

Below in conjunction with Fig. 1--4 describe details and the working condition according to the concrete device that the utility model proposes in detail.

This device selects for use good conductive material such as brass, bronze to make the dop 1 that integral body is round copper shape or approximate circle tubular, its a part of internal diameter is or cylindrical or 3--6 limit shape, or the profile of tooth at 20 places, this part circumference uniform distribution has the axially open seam, and start at from end face on the wall of excircle and be shaped on conical gradually little protuberance or gradually big in 21 recessed sky, its tapering is 12 ° to 120 °.Be set with on the dop cylindrical with good conductive material make can relative slip with dop cylindrical circular cutting ferrule 2, jacket wall one in rounded ends be shaped on recessed sky that the protuberance with said dop is complementary or with the protuberance at 22 places of recessed Kongxiang, dop 21 places coupling, another outer rounded ends is shaped on screw thread, be fixed with the lead 3 that has electricity for welding and can be for the fixing ring flange 4 of usefulness.

Drive that dop is relative with cutting ferrule to slide, many technical schemes are arranged, air pressure or hydraulic mechanism at first are described, it is to be slidingly matched to be set with front end housing 5 steel or aluminium alloy on the cutting ferrule cylindrical, between the back cylinder cover 6 of flange plate type, the two and cutting ferrule rubber seal 7 is housed respectively.Install the cylinder barrel 10 that is shaped on screw socket 8 and screw socket 9 with bolt 23 between two lids, and be fixed with piston 11 on that section cutting ferrule cylindrical between lid, the sealing ring 12 that is fixed on the piston is housed between piston and cylinder barrel.Be provided with the pilot hole 13 of restriction stroke in that section cutting ferrule wall of front end housing containing and stroke, front end housing, dop be solidified as a whole with the pin 14 that passes pilot hole.

If ring flange 4 is fixed on portable soldering set or the welding machine correct position, the dop inner chamber inserts double-screw bolt 15, aims at and is put by welding position.It is that the back cavity of cylinder enters medium that screw socket 9 enters medium (as: compressed air, oil, soap lye etc.), opens screw socket 8, and piston and cutting ferrule are in stationary state, then promote back cylinder cover, cylinder barrel, front end housing, pin, dop etc. and slide backward.By the conical protuberance of dop end, will make the dop wall to the internal strain double-screw bolt that locks.Lead 3 energisings, double-screw bolt is welded in needs the position.Weldering finish to have a power failure, and it is that the ante-chamber of cylinder enters medium that screw socket 8 enters medium, opens screw socket 9, then promotes associated parts such as front end housing and dop to front slide.Said dop protuberance and the recessed Kongxiang of cutting ferrule coincide or throw off, and dop unclamps double-screw bolt, extractor according to self elastic recovery.It should be noted that if adopt structure shown in Figure 2, need on the contrary, also can realize equally the locking of double-screw bolt or unclamp with the described medium order that enters.If not adopting fixed flange, but back cylinder cover is fixed in correct position, then associated part such as dop is in stationary state.Screw socket 9 enters medium so, promotes piston and cutting ferrule to front slide, dop locking double-screw bolt.Welding back screw socket 8 enters medium, and piston and cutting ferrule slide backward, and dop unclamps double-screw bolt.

Second kind of scheme also is air pressure or hydraulic mechanism (not shown), is same as first scheme substantially, just only is shaped on a screw socket on the cylinder barrel, but is between piston and the lid in the chamber corresponding with screw socket, is set with helical spring on cutting ferrule.Screw socket enters medium, promotes to compress when associated part slides spring.Open screw socket after the welding, recover the elastic force promotion associated part of initial state by spring and do opposite slip, to realize locking or to unclamp double-screw bolt.

The structure of third party's case spring mechanism is, has on dop 16 cylindricals of conical protuberance, and suit has the cutting ferrule 17 that can form conical secondary recessed sky with protuberance.Be fixed with on another outer rounded ends screw thread of dop the lead 3 that has electricity for welding and for the fixing ring flange 4 of usefulness, and adjusting nut 18 is housed.Be set with helical spring 19 on that section dop cylindrical between nut and the cutting ferrule end.Screw nut forward, the compression spring to having certain operational forces, then will push up cutting ferrule to front slide, cause the dop inner chamber to have suitable and enough chucking powers.The insertion of double-screw bolt or disengaging are all carried out under this constant state.If the wearing and tearing of dop internal diameter, cylindrical workpiece diameter negative common difference are worth situation appearance such as excessive, need continue to screw nut.

Claims (3)

1, a kind of Workpiece clamping device that is used for the cylindrical workpiece welding, form by tubular and the dop that is shaped on open seam, it is characterized in that being shaped on the wall of rounded ends outside open seam the conical gradually little protuberance or the dop of big recessed sky gradually, its cylindrical is set with cylindrical shape and cutting ferrule that can relative slip with dop, one interior rounded ends of jacket wall is shaped on recessed sky or the protuberance with said protuberance of dop or recessed Kongxiang coupling, another outer rounded ends be equipped with have welding electric conductors and can be for the fixing ring flange of usefulness, said relative slip can be driven by air pressure or hydraulic mechanism, also can be formed by spring mechanism.

2, clamping device according to claim 1, it is characterized in that air pressure or hydraulic mechanism are set in the forward and backward cylinder cap of cutting ferrule cylindrical by movable sealing, front end housing is fixed with the pin and the dop that pass the cutting ferrule pilot hole, back cylinder cover is can be for the fixing flange dish type of usefulness, clamp cylinder barrel between lid and be installed in the piston of cutting ferrule cylindrical, between it and cylinder barrel piston ring is housed also and forms.

3, clamping device according to claim 1, it is characterized in that spring mechanism is shaped on screw thread by dop away from the outer rounded ends of protuberance or recessed sky, be equipped with on it and have welding electric conductors and, be set with the spring composition between nut and the cutting ferrule for the fixedly ring flange and the adjusting nut of usefulness.

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