The friction welding (FW) special fixture of three bearing pins fork and hollow pipe
The utility model relates to a kind of anchor clamps, the friction welding (FW) special fixture of particularly a kind of three bearing pins fork and hollow pipe.
The friction welding of traditional three bearing pins fork and hollow pipe is to be the big cylindrical that benchmark clamps yoke with the big plane of yoke, be to be the clamping and positioning face with the yoke endoporus owing to the turning of yoke shank, thereby the axiality of yoke shank and yoke endoporus should be relatively good.And finish forge drift and external mold allow the coaxiality error of 0.4mm when finish forge yoke blank, so the cylindrical of yoke and endoporus have the following coaxiality deviation of 0.4mm, thereby the axiality of yoke cylindrical and yoke shank can be very not desirable.Behind the shank that hollow pipe is welded to three bearing pins fork, the circular runout of yoke shank is sometimes greater than 1mm.Especially to yoke shank welded hollow pipe the time, the not reface of yoke shank has been processed, and causes the range estimation of finished product workpiece friction welding (FW) two ends that obvious dislocation is arranged, and not only influences presentation quality, and has influenced packing into of bearing.
And, traditional clamping yoke cylindrical welding, we do not consider that the error of workpiece self only observes the cylindrical anchor clamps and find that three claws only depend on locating piece and screw to be connected on the chuck, a period of time rear jig wearing and tearing, beating of three-jaw self can be very undesirable, needs back cushion pad etc. could guarantee the precision of anchor clamps self.Such adjustment be we can say and wasted time and energy.
The utility model content
The technical problems to be solved in the utility model provides the high three bearing pins fork of a kind of positioning accuracy and the friction welding (FW) special fixture of hollow pipe.
For solving the problems of the technologies described above, the friction welding (FW) special fixture of the utility model three bearing pins fork and hollow pipe comprises pedestal, guide rod, the guiding base plate, spring and at least three guide pillars, the front end of described pedestal is provided with a positioning block, the fixedly connected described guide rod in the rear end of described pedestal, described spring of socket and described guiding base plate on the described guide rod, the front end of described spring is resisted against on the described guiding base plate, the rear end of described spring is resisted against on the described baffle plate, fixedly connected with the guiding base plate in the rear end of described guide pillar, the front end of guide pillar passes described pedestal, described each guide pillar is distributed on the same circumference, and the center line of this circumference overlaps with the rotation centerline of described pedestal, and the front end outside of each guide pillar is provided with chamfering.
Preferably, the matching relationship of described guide pillar and described pedestal is a matched in clearance, causes sliding front and back in pedestal.
Preferably, between described locating piece and the described pedestal pad is set, the pad of use different-thickness can be adjusted the distance between locating piece and the pedestal.Described locating piece and described pad are fixed on the described pedestal by screw.
Preferably, described pedestal comprises an axial region and a shoulder, socket one transition block on the described axial region, and described transition block is fixed on the described shoulder.
Preferably, described pedestal links to each other with the power rotating mechanism.
Clamping and positioning of the present utility model is by the guide pillar self-centering workpiece lumen of finger-type, clamp claw clamp shaft fork handle portion then, such locate mode positioning accuracy can not reduce with the wearing and tearing of anchor clamps, and the location benchmark is consistent with postorder turning, so beating of the workpiece weld that processes can guarantee within 0.2mm.It is consistent with the measuring basis behind the friction welding (FW) that the location clamps benchmark, prevented effectively because the forging runout error causes three bearing pins behind the friction welding (FW) to pitch the problem of wheel body and footstalk decentraction.The utility model is simple in structure, mounting or dismounting are convenient, and clamp-replacing is more laborsaving, convenient.
Description of drawings
Fig. 1 is a use reference diagram of the present utility model.
Reference numeral is as follows:
1, pedestal 41, chamfering
11, axial region 5, locating piece
12, shoulder 51, pad
13, pin 6, guiding base plate
2, guide rod 7, transition block
21, baffle plate 8, screw
3, spring 91, clamping claw
4, guide pillar 92, three bearing pins fork
The specific embodiment
Hereinafter will the friction welding (FW) special fixture of the utility model three bearing pins fork and hollow pipe be described in detail with reference to the accompanying drawings.
As shown in Figure 1, the utility model comprises pedestal 1, guide rod 2, guiding base plate 6, spring 3 and guide pillar 4, and an end of pedestal 1 passes through fixedly a positioning block 5 of soket head cap screw 8, and a pad 51 is set between locating piece 5 and pedestal 1, to adjust the position of locating piece 5.The other end of pedestal 1 is fixed a guide rod 2, cover one spring 3 on the guide rod 2, and the rear end of guide rod 2 fixedly installs baffle plate 21 by screw 8, and spring 3 is resisted against on the baffle plate 21.The other end of spring 3 be provided with one the guiding base plate 6, this guiding base plate 6 is enclosed within on the guide rod 2, with guide rod 2 be matched in clearance.
Fix three guide pillars 4 on the guiding base plate 6, an end of each guide pillar 4 all is provided with a chamfering 41, and this chamfering 41 matches with the inboard chamfering 41 in the end of three bearing pins fork 92.The center line of the chamfering 41 of all guide pillars 4 overlaps with the rotation centerline of described pedestal 1.Guide pillar 4 passes the through hole of pedestal 1, and guide pillar 4 is 16H7/h7 with the matching relationship of pedestal 1, matched in clearance.Guide pillar 4 can slide in pedestal 1 under the situation of the pretightning force that overcomes spring 3.
Said base 1 comprises an axial region 11 and a shoulder 12, and the radial dimension of shoulder 12 is greater than the radial dimension of axial region 11.Socket one transition block 7 on the axial region 11, this transition block 7 is fixed on the shoulder 12 by soket head cap screw 8.Under the normal condition, transition block 7 does not contact with three bearing pins fork, and transition block 7 has limited three bearing pins fork and moved backward along guide pillar 4, is provided with extreme position for three bearing pins fork.Also protected the guiding area of guide pillar in addition, do not allowed rubbish enter.
Pin 13 also is set on pedestal 1, and pin 13 is used for being connected with the power rotating mechanism, to drive rotation of the present utility model.Pin 13 is with being connected of pedestal 1 can be aided with glue special bonding.
When using the utility model that three bearing pins fork 92 is positioned clamping, the part of locating piece 5 and pedestal 1 is placed on three bearing pins and pitches 92 inner chambers the inside, locating piece 5 is resisted against three bearing pins and pitches on the bottom surface of 92 inner chambers, play one at the beginning of positioning action, and hold three bearing pins fork 92.Baffle plate 21 is fixed on the lathe.When carrying out friction welding, central siphon to be welded is withstood the shank of three bearing pins fork 92, at this moment, chamferings 41 tightly touch in three guide pillars 4 and the three bearing pins fork 92, guide pillar 4 drives the spring 3 of guiding base plates 6 compression guiding base plates 6 back, till the locating piece 5 of pedestal 1 front abuts to three bearing pins and pitches the bottom of 92 inner chambers.Like this, utilize the location of three guide pillars 4 to make the center line of rotation centerline of the present utility model and three bearing pins fork 92 coincide, has just finished the location of three bearing pins fork 92.At last, clamp claw 91 clamping shaft fork handle portions, the power rotating mechanism drives the utility model rotation by pin 13, begins welding.
Above-mentioned design example only is used for the utility model is described, and does not constitute the restriction to the claim scope, and other substantial equivalence means that it may occur to persons skilled in the art that are all in the utility model claim scope.