The air cylinder is used to provide the impact force for the gantry punch, and the others are driven by the mechanical structure or the motor. The gantry punch can realize the function of crankshaft stopping at any position, with good performance and high stability coefficient. When it is connected with the electrical system, it can realize automatic feeding, photoelectric protection and other protection functions. The mechanical (rigid) clutch can not stop at any position, it can only stop at the top dead center, so it has poor performance and low stability coefficient. The cost of pneumatic clutch is higher than that of mechanical clutch. At present, pneumatic clutch has the tendency to replace mechanical clutch. The automatic feeding device of the gantry punch is convenient for the automation transformation of the commonly used medium and small stamping machines. It can automatically produce small type of plate stamping parts. It can not only form the automatic shutdown state of the stamping machine, but also carry out the counting function and the alarm function in case of lack of materials, In addition, the automatic feeding device enables the stamping machine to work continuously, enhances the labor productivity of the enterprise, and extends the service life of the brake belt.

In order to use the gantry punch products well, it is necessary to carry out a series of function tests for the punch to ensure that it works in safe mode and prolong the service life of the machine. The main detection is as follows:

1、 Load capacity: limit the tonnage of output required for working to the nominal capacity of the punch. Oil pressure overload protection is a safe device to prevent stamping errors. Before operation, calculate the tonnage required for work in advance. During long-term blanking operation, please maintain the capacity of less than 70% to extend the life of the machine.

2、 Pressure capacity: it varies according to the stroke position of punch, "capacity stroke curve". When using gantry punch, the working tonnage shall be less than the stamping capacity shown in the curve, otherwise, it will damage the clutch.

3、 Energy capacity: the energy consumed by each stroke depends on the balance between the released energy of flywheel and the energy supplied by the motor in each cycle. Therefore, if the operation of exceeding "energy capacity" is carried out for a long time, the phenomenon of motor post trip will occur. In order to prevent this obstacle, it is necessary to operate under the condition of less than rated working energy.

In the process of designing the automatic feeding device, we understand that gantry punch is relatively sufficient in power. Therefore, in the application scheme of power source, we can use gantry punch to promote the normal operation of the feeding device. We use single chip microcomputer to form the automatic shutdown state in the design process, It can also realize the function of counting and the function of alarm when the material is not available. The automatic feeding device shall be designed as the existence of the rack during the design. In the device setting, it is necessary to determine that the tray, dial, adjustable and driving of the automatic feeding are various. In the process of design and assembly operation, the pallet device shall be fixed on the rack, and the track of workpiece sliding shall be provided in the prerequisite steps of normal installation, That is, the dial device groove can provide conditions for the workpiece to slide under the punch on the pallet, and then make the feeding device run automatically. First, the steps of the stamping machine operation are carried out. The dial drive device can perform the indexing circle movement, all of which are due to the borrowing of the power of the gantry punch and further moving the dial device, Then, the workpiece falling into the notch of dial device can be driven by dial, and slide down the designed track to the lower part of the punch of gantry punch in design, and then punch the sliding workpiece. During the continuous normal operation of the device involved, the workpiece will slide down to the notch of the next tray device with the designed track, Thus, the workpiece products enter the finished product warehouse along the corresponding track.