Self-centering elastic tensioning type frock clamp
Technical field
This utility model relates to a kind of grinding auxiliary device, particularly relates to a kind of self-centering elastic tensioning type frock clamp.
Background technology
Being arranged on independent chuck by the workpiece of processing, make the center of workpiece and the center of rotation of chuck agree, this process is referred to as centering workpiece.When processing longer shaft-like workpiece, relatively machining long workpieces adopts chuck centering, loses time, and, there occurs Reference Transforming, centre bore be transformed into cylindrical, and the grinding length of grinding machine less than Workpiece length time, small-sized machine tool cannot be carried out processing.
Utility model content
Technical problem to be solved in the utility model is: provides a kind of self-centering elastic tensioning type frock clamp, it is achieved process the purpose of machining long workpieces with small-sized machine tool, saves the time of operation chuck centering, improve the machining accuracy of production efficiency and workpiece.
This utility model be the technical scheme is that by the problem that solution is set forth above
A kind of self-centering elastic tensioning type frock clamp, including hold-down bolt 1, holding frame 2, securing member 3, nut 4 and spring 5, hold-down bolt 1 is connected on holding frame 2, described holding frame 2 includes annulus seat 6, annulus seat 6 is evenly equipped with three supporting legs 7, supporting leg 7 is provided with through hole 8, securing member 3 one end is connected through through hole 8 with nut 4, securing member 3 other end is fixed on lathe, securing member 3 between supporting leg 7 and nut 4 is arranged with spring 5, annulus seat 6 is provided with mean for the screwed hole 9 that hold-down bolt 1 is screwed into.
The number of described supporting leg 7 is three, and three supporting legs 7 are uniform with the angle of 120 degree.
The number of described hold-down bolt 1 is three, and annulus seat 6 is evenly equipped with three screwed holes 9 being screwed into for hold-down bolt 1, and three screwed holes 9 are distributed on annulus seat 6 with the angle of 120 degree, and screwed hole 9 is provided with hold-down bolt 1.
Described holding frame 2 material is general steel plate.
The thickness of described holding frame 2 is 0.8-3cm.
Described annulus seat 6 is one-body molded with supporting leg 7.
Described securing member 3 is screw rod.
Operation principle of the present utility model: first have to holding frame to be enclosed within workpiece;Secondly making holding frame and workpiece tighten with hold-down bolt, again the centre bore of workpiece and the top of lathe are close to, finally the through hole of holding frame and spring housing are being fixed on the securing member on lathe, fastening nut pressing spring, makes workpiece press close to top simultaneously.
The beneficial effects of the utility model are in that: realize processing the purpose of machining long workpieces with small-sized machine tool, fixture positioning and clamping simple and fast, save the time of operation chuck centering, reduce the workload of centering greatly, save multiple clamping and on fall the workpiece time, improve production efficiency, alleviate the work load of workman, centering precision is high, improves the machining accuracy of workpiece.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structure enlarged diagram of holding frame in Fig. 1.
Wherein, 1-hold-down bolt, 2-holding frame, 3-securing member, 4-nut, 5-spring, 6-annulus seat, 7-supporting leg, 8-through hole, 9-screwed hole.
Detailed description of the invention
Embodiment of the present utility model is further illustrated below in conjunction with accompanying drawing.
With reference to Fig. 1-2, a kind of self-centering elastic tensioning type frock clamp described in this detailed description of the invention, including hold-down bolt 1, holding frame 2, securing member 3, nut 4 and spring 5, hold-down bolt 1 is connected on holding frame 2, described holding frame 2 includes annulus seat 6, annulus seat 6 is evenly equipped with three supporting legs 7, supporting leg 7 is provided with through hole 8, securing member 3 one end is connected through through hole 8 with nut 4, securing member 3 other end is fixed on lathe, securing member 3 between supporting leg 7 and nut 4 is arranged with spring 5, annulus seat 6 is provided with mean for the screwed hole 9 that hold-down bolt 1 is screwed into.
The number of described supporting leg 7 is three, and three supporting legs 7 are uniform with the angle of 120 degree.
The number of described hold-down bolt 1 is three, and annulus seat 6 is evenly equipped with three screwed holes 9 being screwed into for hold-down bolt 1, and three screwed holes 9 are distributed on annulus seat 6 with the angle of 120 degree, and screwed hole 9 is provided with hold-down bolt 1.
Described holding frame 2 material is general steel plate.
The thickness of described holding frame 2 is 0.8-3cm.
Described annulus seat 6 is one-body molded with supporting leg 7.
Described securing member 3 is screw rod.
The operation principle of this detailed description of the invention: first have to holding frame to be enclosed within workpiece;Secondly making holding frame and workpiece tighten with hold-down bolt, again the centre bore of workpiece and the top of lathe are close to, finally the through hole of holding frame and spring housing are being fixed on the securing member on lathe, fastening nut pressing spring, makes workpiece press close to top simultaneously.
Having the beneficial effects that of this detailed description of the invention: realize processing the purpose of machining long workpieces with small-sized machine tool, fixture positioning and clamping simple and fast, save the time of operation chuck centering, reduce the workload of centering greatly, save multiple clamping and on fall the workpiece time, improve production efficiency, alleviate the work load of workman, centering precision is high, improves the machining accuracy of workpiece.
Specific embodiment of the utility model does not constitute restriction of the present utility model, every employing analog structure of the present utility model and change, all in protection domain of the present utility model.