Multiple spindle rotation automatic screw tighten machine

A new multiple spindle rotation automatic screw tighten machine is a novel technology, which can relieve human toil and improve production efficiency. In the market of China, this type of machine is favored by manufacturers who want to automate the process of assembly.

In recent years, people's living standard has been constantly upgraded. Lots of commercial sectors have been developed rapidly resulting from the upgrading process. For example, supermarkets are becoming popular with people all around China nowadays because it simplifies their lives and provides convenience for them. Consequently, more pressure has been put on the manufacturing industry in our country as well as on enterprises running factories in China due to increased demand for products from consumers nationwide.

So, assembly factories are always busy doing mass production. However, due to the fact that the demand for goods is getting higher and higher. The growth of global trade also implies that many manufacturers wish to reduce the production cost to improve their profit margins. So, assembly workers are required to work faster and harder than before.

Moreover, assembling process often requires workers to tighten screws by hand which will damage their hands or wrists if they don't slow down soon enough after reaching peak velocity. If screws are not tightened sufficiently it may cause accidents due to poor quality control; therefore, it is important that this stage of manufacture is handled efficiently and safely.

For the aforementioned reasons, it is necessary for manufacturers to develop an automatic screw tightening technology so that they can work faster and more efficiently than ever before.

Fig.1 The structure of the proposed machine is shown in figure 1(a). And its principle is as follows: When the screw starts to turn, the spindle will move forward by the motor automatically. And then, when it begins to rotate, it will push back automatically until tightened accurately. The speed of rotation will be adjusted by the speed reducer accordingly. The rotating angle also can be regulated by changing rotary encoder within certain range or controlling other parameters by PLC or software.

Fig. 2(a) shows the proposed machine working process. In fig. 2(b), the screw moves backward automatically and then brings back to the former position automatically. Any process can be made automatically by programmable controller or a PLC system or a software. It also can be operated manually with a switch for easier inspection and maintenance work.

Fig. 3 shows a practical example of operation of this machine with AB screw head, A is motor spindle Rotation Machine, B is sensor pick up arm way, C is motor, D is encoder or rotation angle regulation unit and E is screw carrying base frame(screws are not shown in the proposed machine).