Punch Press -The Primary Machinery For Bicycle Tool Production
The production of traditional bike tools doesn’t need many machines. That is the reason why raw materials will influence the final price deeply. Although production machines are simple and user-friendly, some machines also need skilled workers to operate. Now we will introduce the most basic and most important machine- Mechanical Power Press.
The design principle of the punch press is to convert circular motion into linear motion. The main motor drives the flywheel to drive the gear, crankshaft (or eccentric gear), connecting rod, etc. through the clutch to achieve the linear motion of the slider. The motion from the main motor to the connecting rod is circular motion. The operation of the press requires certain skills and proficiency. After a period of mechanical training, the workers can operate the punch press by normative steps according to the production standards to produce semi-finished bicycle tools.
There are 5 main functions of punch press:
1. Bending:
A molding method is a processing method that bends metal plates, pipe fittings, and profiles to a certain angle, curvature, and shape. Bending is one of the main processes widely used in the production of stamping parts. The bending of metal materials is essentially an elastic-plastic deformation process.
After unloading, the workpiece will have elastic recovery deformation in the direction, called rebounding. The rebounding affects the accuracy of the workpiece, which is the technical key that must be considered in the bending process.
2. Deep Drawing:
Deep drawing, also known as drawing or calendaring, is a stamping method that uses a die to make the flat blank after blanking become an open hollow part. Thin-walled parts with cylindrical, stepped, conical, spherical, box and other irregular shapes can be made by the deep drawing process. If combined with other stamping processes, parts with extremely complex shapes can also be manufactured. Due to its different geometric characteristics, the location of deformation zone, the nature of deformation, the distribution of deformation, and the stress state and distribution law of each part of the blank are quite different, even essential.
3. Stretching:
It is to exert tension on the sheet through the stretching molding so that the sheet produces uneven tensile stress and tensile strain, and then the joint surface of the sheet and the stretching die gradually expands until it completely fits with the stretching model surface. Stretching is mainly used to manufacture hyperbolic skin with certain plasticity, large surface area, gentle and smooth curvature change and high-quality requirements. Due to the simple process equipment and equipment, the material utilization rate and productivity are low.
4 Spinning:
It is a metal rotary processing process. In the process of processing, the blank actively rotates with the spinning die or the spinning head actively rotates around the blank and the spinning die, and the spinning head feeds relative to the core mold and the blank, making the blank produce continuous local deformation to obtain the required hollow rotating parts.
5. Shaping: It refers to the secondary trimming of the product shape by using the established grinding tool shape. It is mainly reflected in the pressure plane, spring foot, etc. Re-processing is used when some materials are elastic and cannot guarantee the quality of one-time molding.
Our company mainly uses a punch to cut materials and reshape edges. There is a built-in template in the punch press. The worker puts the material (usually, the material is a metal panel) on the working platform, and controls the machine moving with his feet. He put forward the material and stamps one foot at once. The stay time is determined according to the production needs.
In the process of using the press, the edge needs to be reshaped to ensure that the edge is smooth and tidy. In the process of using the press, some rough edges of bicycle tools cannot be completely avoided. Our company will add fitter procedures for repair or properly conduct heat treatment to improve the material processing performance. The most important thing is to regularly check the molding situation inside, then replace or improve them in time.
At present, our company has 38 mechanical punches, 6 automatic punch lines, and 5 CNC punches. It can meet the demand of 500000 parts per month.
