CNC Spring End Grinding Machines Spring Material
CNC Spring End Grinding Machines Spring material
When the spring material through the alignment mechanism and feeding mechanism, hit the top of the plunger groove, forcing the spring material bending deformation, the coil is the material to withstand the three friction points and winding forming. For the single-pin CNC spring end grinding machine, the three friction points are the spring material and the wire plate, mandrel, mandrel cut point; for double mandrel CNC spring end grinding machine, the three friction points are spring material and Wire plate, two curves of the tangent point of contact. During the bending of the spring material into the loop, the wire will come into contact with the slope of the pitch block. The pitch of the helical compression spring is made when the pitch mechanism of the NC spring end grinding machine moves the pitch block in the direction of the axis of the spring winding. When the coil spring is compressed and the head (support ring) or the helical tension spring is retracted, the pitch block is retreated and the coil spring is formed by the front coil. When a spring is rolled, the feed mechanism stops feeding, and the cutter control machine forces the cutter to cut off the spring. So the reciprocating operation to achieve the automatic spring forming.
Curve gauge Under the control of the spring diameter changing mechanism, it can be moved back and forth to adjust the diameter of the spring or to adjust the coil spring. When the coil spring is curled, the corresponding variable diameter cam must be used. As the spring material is continuously wound into a coil, the variable cam is also rotated accordingly to control the mandrel for proper movement, rolling out the required adjustable coil spring.
When you want to roll the pitch (commonly known as unequal pitch) of the spiral compression spring or other coil spring, the use of variable pitch cam; in the role of variable pitch cam, through a set of pendulum mechanism to promote the block before and after the block movement, To achieve the spring of the variable pitch.
From the NC spring end grinding machine working principle can be seen: single pendulum CNC spring end grinding machine has the advantage of only need to adjust a curve gauge, in the exchange of spring varieties when the machine to adjust the time to adjust less, and can roll higher The initial stress of the spiral tension spring, in the left and right spin spring exchange is even more convenient; double mandrel CNC spring end grinding machine has the advantage of the mandrel is no longer a forming coil of a friction point, but play a role in cutting the wire when the auxiliary role , So in the production of different diameter of the spring, do not have to frequently swap mandrel. In addition, the double mandrel CNC spring end grinding machine three friction points corresponding to the central angle is larger than the single rod, so the volume is relatively large spring when the spring is more convenient and stable. But the double mandrel CNC spring end grinding machine in the left and right spin spring exchange is very troublesome, need to modify the entire diameter change mechanism.