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Nishida Spring Machinery introduces the production principle of computerized spring coiling machine

Source: Time:2019-07-22 15:55:00 views:

When the spring material passes through the straightening mechanism and the feeding mechanism, and hits the slot at the front end of the ejector rod, the spring material is forced to bend and deform , Spring coil is wound into three friction points supported by the material.

When the spring material passes through the straightening mechanism and the feeding mechanism, and hits the slot at the front end of the ejector rod, the spring material is forced to bend and deform , Spring coil is wound into three friction points supported by the material. For the single ejector spring coiling machine, the three friction points are the spring material and the wire plate, the mandrel, and the top The tangent point of the rod; for the double ejector spring coiling machine, the three friction points are the tangent points where the spring material contacts the wire plate and the two curve gauges. In the process of bending the spring material into a loop, the steel wire will contact the inclined surface of the pitch block. When the pitch change mechanism of the spring coiling machine moves the pitch block along the axis of the spring winding forming, the pitch of the helical compression spring is made. When coiling a helical compression spring (support ring) or a helical extension spring, the pitch block is retracted to the back. When the spring is coiled, the next coil is formed against the previously coiled coil. When a spring is rolled, the feeding mechanism stops feeding, and the cutter control machine forces the cutter to cut the spring. Such reciprocating operation realizes the automatic forming of the spring.
The curve gauge can be moved back and forth under the control of the spring diameter changing mechanism to adjust the diameter of the spring or to roll the diameter-reducing coil spring. When rolling a reducing coil spring, a corresponding reducing cam must be used. As the spring material is continuously rolled into a coil, the diameter-reducing cam also rotates correspondingly to control the ejector rod to move appropriately to roll out the required diameter-reducing coil spring.
When coil compression springs with variable pitch (commonly known as unequal pitch) or other spiral springs are to be rolled, a variable pitch cam is required; under the action of the variable pitch cam, a set of swing rod mechanism is used to push the pitch The block moves back and forth to realize the coiling of variable-pitch springs.
It can be seen from the working principle of the spring coiling machine: The advantage of the single ejector spring coiling machine is only Need to adjust a curve gauge, the machine tool adjustment time is less when changing the spring varieties, and the spiral tension spring with higher initial stress can be rolled, which is more convenient when the left and right spiral springs are exchanged; double ejector coil springs The advantage of the machine is that the mandrel no longer becomes a friction point of the formed coil, but only plays an auxiliary role when cutting the steel wire. Therefore, it is not necessary to frequently exchange the mandrel when producing springs of different diameters. In addition, the center angle corresponding to the three friction points of the double ejector spring coiling machine is also larger than that of the single ejector. Therefore, it is more convenient and stable to wind a relatively large spring. However, the double ejector spring coiling machine is very troublesome when the left and right coil springs are exchanged, and the entire outer diameter changing mechanism needs to be modified.
Affect the quality of computer spring coiling machine There are many factors, such as the tensile strength, elongation, elastic modulus, yield ratio of the spring material, the dimensional accuracy grade and surface condition of the material, the accuracy of the machine tool, the friction condition of the auxiliary tool and the metal wire contact part , The length of the feed, the winding speed and the technical level of the operator.

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