Adjustment and Maintenance of Camless Spring Making Machine

Camless spring making machine is a new type of wire forming machine equipment, which is widely used for its advantages such as easy debugging, fast and stable production, and suitable for the production of shaped springs.

Adjustment and maintenance of camless spring making machines

The adjustment of the camless spring making machine can be divided into a single adjustment of each mechanism and an overall adjustment that links the various mechanisms together. When adjusting the camless spring making machine, the necessary tools should be correctly selected and installed, and then adjusted one by one according to the process requirements. The individual adjustments are as follows:

1. Adjustment of spring outer diameter:

It is mainly for adjusting the external warp mechanism. When the cylindrical spring is rolled, the ejector rod is fixed up or down or rotated to a suitable position. Only adjusting the ejector rod inside or outside is required, so it is not necessary to install a reducing cam, and the adjustment is relatively simple. When rolling a conical spring or a convex spring, a reducing cam must be installed.

The conical spring starts from the small-diameter end to the large-diameter end. The running process of the reducing cam is from the highest point to the low point. The ejector rod is continuously retracted to form a small-diameter ring to a large-diameter ring. , The ejector rod returns to the position of the small head of the roll, and starts a new cycle.

(1) Sharpening of the mandrel:

With a double ejector spring machine, the mandrel only serves to cut the edge of the spring, so it is sometimes called a core knife, and its sharpening is relatively simple. The outer diameter of the mandrel should be smaller than the inner diameter of the spring, but it should not be too small, otherwise, it will cause a hoe phenomenon when the spring is cut. At the same time, the gap between the cutter and the mandrel cannot be too large.

(2) Adjustment of ejector rod:

The ejector rod controls the diameter of the spring. When the upper ejector rod moves toward the core axis, the diameter of the spring becomes smaller, otherwise the diameter is larger, and the lower ejector rod moves toward the core axis, and the diameter becomes smaller.

2. Adjustment of feeding length and total number of turns:

The feeding length depends on the number of teeth of the selected gear. For a coil spring machine with incomplete gear feeding, the number of teeth of its incomplete gear is controlled, and the length of the spring is unfolded.

Number of gear teeth (Z) = unrolled length of spring (mm) / feeding factor

The unrolled length of the spring (L) = (outer diameter of the spring-wire diameter) × ∏ × total number of turns.

After obtaining the gear of the required gear, install the flange (note that the gap position of the gear is left in the working position of the cutter), and the required total number of turns can be obtained.

3. Adjustment of free height, pitch and effective number of turns:

There are two types of spring length adjustment: internal push and external pitch: internal push is the adjustment of the straight rod pushed inside to drive the ejector pin to open the spring, so as to open the spring's pitch. It is also adjusted by the unequal cam and the lever. The principle is to push a straight rod to open the pitch. The length of the push rod can be adjusted by the screw under the jumper driven by the cam; the outer pitch is the cam driven by the pitch knife, and the ejector spring opens the spring.

Free height and pitch are adjusted by adjusting bolts under the pitch knife. With the adjustment screw down, the height becomes shorter and the pitch becomes smaller. On the other hand, the length is longer, the pitch becomes larger, and the number of effective turns is adjusted by the variable-pitch cam. The larger the working surface of the cam is, the more effective turns increase, and vice versa.

4. Adjustment of tight force between support rings

When rolling a compression spring, both ends of the ring are required to be tight, and there is a certain requirement for the close length, otherwise the working characteristics of the spring will be affected, and a certain tight force is required to prevent the end gap. When rolling a tension spring with initial tension, it is also required that there is no gap between the coils. In both cases, it is necessary to adjust the tightening force of the parallel ring.

When adjusting and tightening the machine, first check whether the wire is in a straight line and let the wire pass smoothly, then adjust the angle of the ejector rod, the upper ejector rod turns inward and the tightening force increases, otherwise there is a gap. But the tightening force should not be too large, so as not to increase the diameter when it touches the lead plate.

5. Adjustment of cutting mechanism:

The cutting mechanism is a cutter that uses a vertical cutting method to work simultaneously with the core to complete the finished spring. The gap between the cutter and the cutting plane of the mandrel should be 0.05mm-0.1mm. If the gap is too large, cutting burrs will occur. The cutting plane should pass through the spring. The center of the ring, otherwise the end ring will be deformed when it is cut, or the size of the center of the coil will be unstable. When a large spiral spring is rolled, the size of the mandrel can be increased, allowing the spring coil to be supported at the same time.

Selection and reasonable use of camless spring making machine tooling

The tooling of the camless spring making machine mainly includes feeding rollers, guide plates, ejectors, cams, mandrels, cutters, pitch knives, incomplete gears, etc. Whether the tooling selection is reasonable will directly affect the quality of roll yellow.

Precautions

1. Whether the rotation of the motor is consistent with the rotation of the machine sprocket.

2. The first tooth of the incomplete gear is half tooth lower than the second tooth, as the transition tooth, otherwise it will touch the tooth.

3. Before turning on the machine, you must turn the handwheel to check whether it is operating normally.