How are the small rivets tightened tightly? First, let's take a look at how it works. Self-piercing riveting is the process of forming a joint between a sheet and a rivet without pre-punching. The half-empty or solid rivet used is first used as a punching tool and then plastically deformed together with the riveted sheet to achieve the purpose of joining. There are several types of self-piercing riveting. When the semi-tubular rivet is pressed by the punch, the rivet penetrates the upper sheet and expands into the lower sheet, and then the rivet expands together with the lower sheet to form a machine between the two sheets. Interlock the mechanism to complete the connection.
With the development of the automotive industry, the economic requirements of automobiles are becoming higher and higher, which makes automakers pay more attention to the lightweighting of the body assembly and the high quality of the connection, and seeks to reduce the quality of the car body. One of them is to use light weight. Materials such as aluminum, plastic and other raw materials. So far, spot welding (resistance welding) is the main method of connecting steel plate body structure, which is not only conducive to mass production, but also reliable and reliable; but for the connection of black metal and non-ferrous metal, between non-ferrous metals (such as thin aluminum plate) Connections, metal to non-metal connections, non-metal connections, spot welding is difficult or powerless.
As a mass-produced car, in the connection of body parts bonding, welding, riveting, etc., in order to meet the needs of rapid and automated production, in order to connect materials that cannot be spot-welded and difficult to spot-weld, riveting, especially self-piercing riveting, The more you come to be valued and favored.
The self-piercing riveting process of the semi-tubular rivet, the pressing ring first moves downward to pre-compact the riveting material to prevent the material from flowing into the concave mold under the force of the rivet, and the downward punch moves the rivet to puncture downward. Upper material. Under the joint action of the die and the punch, the tail of the rivet is opened in the lower metal to form a bell mouth shape to lock the riveting material for the purpose of connection.
In the manufacture of automobile bodies, the self-pierce riveting process of semi-tubular rivets is mainly used in the lightweight production of automobiles. The semi-hollow riveting process is thicker placed on the lower layer when riveting the same metal material; the plasticity is placed on the lower layer when two layers of different metal materials are used; when the metal and non-metal materials are riveted, the metal material is placed on the lower layer.
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The meter can be connected with computer as follows. Connect the meter and computer with a USB-to-RS485 converter( converter A+ end to transmitter A+ end, B- to B-, and GND to GDN); turn to device manager of the computer to check COM port connected with meter. Start the software, select the right COM port and click Connect; do not change any other parameters (if you do not know the right one, click Automatic options on the left, click Connect, plug & unplug the transmitter, and then check if it is connected). You can click Connect on the tool bar to disconnect or connect again. It will shown Connected/Not Connected at the bottom of this interface.
The flow direction is settable. There are 4 options, forward(default), reverse, absolute value & bi-direction. There is a direction mark on the sensor. Forward means the same direction with the mark on sensor, the meter will only count the flow in this direction; reverse means the opposite direction of the mark, the meter will only count the reverse direction; bidirectional means that the meter will measure both directions, it increases when it is forward and decreases when reverse; absolute means it increases no matter it is forward or reverse.
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