What Is an Automatic Center Punch?
Full-automatic punching machine is a device for controlling the punching of the window cage of the bearing cage. It consists of two parts: punching die (connected to the punch) and electronic control system. The control system consists of a computer control part, a photoelectric input circuit, an electromagnet control circuit, a display circuit, and a stepper motor drive circuit.
The automatic punching machine system completes various functions under the control of a unified clock pulse. When the switch is turned on
The traditional punching of the cap of the fuse tube is: the worker places the workpiece one by one Figure 1 Parts of the fuse cap
On the punching die, the punching action completes the punching, and the worker removes the workpiece. The method is simple in structure, but low in efficiency, high in cost and prone to accidents. A company in Xiamen commissioned the design and processing of a fully automatic punching machine. The machine requires that it can automatically punch a small hole of 0.8mm in a safety tube cap with an outer diameter of 3.59mm and a wall thickness of 0.2mm (as shown in Figure 1). The deviation of the hole from the center of the part cannot exceed ± 0.01mm, and 3 pieces are punched per second.
Working principle of automatic punching machine
Simple mechanical structure of the automatic punching machine (as shown in Figure 2). Simple working principle of the system Figure 2 Mechanical schematic of the automatic punching machine
The description is as follows: Start the power switch, and the system is electrified: (1) Start the vibration hopper switch first, the vibration hopper 1 starts to vibrate and feed, and enters the nozzle after passing through the hopper chute 2. The feed nozzle is connected to the feed slot of the indexing plate 5, and exactly one incoming material (safety tube cap) enters the feed slot of the indexing plate at a time. (2) When the punching switch is adjusted, the motor 10 starts to rotate. Through the coupling 11, the main shaft 12 drives the eccentric 15 and the bevel gear 16 to rotate. At this time, the movement is divided into two parts: a. The eccentric wheel 15 drives the bearing block 13, the bearing 14, and the upper mold part of the mold 7. When punching, the eccentric wheel gives forward displacement, and the spring in the mold discharge plate is compressed. The punch 6 completes punching; when discharging, the spring in the discharge plate is extended, the punch moves backward, and the discharge plate removes the punched insurance tube cap. b. The two bevel gears mesh to change the direction of movement, and the shaft 17 rotates. The shaft 17 drives the incompletely driven gear 3, the incompletely driven gear 4 and the index plate 5 fixed on the incompletely driven gear 4 for rotational movement. The main shaft rotates once, and the incomplete driven gear rotates 1/4 turn, so that the ordered materials from the vibration hopper can be sent to the die one by one. The main shaft rotates once to punch a safety tube cap, so as to realize automatic punching.
Features and advantages of automatic punching machine
Figure 3 Incomplete gear mechanism
(1) The incomplete gear mechanism (as shown in Figure 3) is adopted as the gap movement mechanism. When the driving gear 1 makes one revolution, the driven gear 2 makes one quarter of a revolution, and the driven gear stops four times per revolution. When the driven gear stops, the locking arc on the driving gear and the locking arc on the driven gear cooperate to lock to ensure that the driven gear stops in the locked position. When the motor rotates at high speed (Figure 3) when the gear mechanism is incomplete, the angular velocity of the driving gear increases, the angular velocity of the driven gear also increases, and the inertial force increases during operation, and the gears are prone to jam at this time. To this end, we have added an elastic damping system to the system (see Figure 4).
The inertia force of the gear is overcome by adjusting the spring force. If it is necessary to run at high speed, the inertia force of the gear is large, the spring force of the spring should be increased, otherwise, the spring force should be reduced. This guarantees that incomplete gears can operate normally at high speeds.
(2) This mechanism uses the guiding function of the punching die, eliminating the slider mechanism of the punch; because the punching force is small, the flywheel mechanism of the punch is omitted, so the entire mechanism is simplified and the processing is convenient.
(3) The mold is usually installed vertically on the punch to complete the stamping task. While the agency makes use of existing models Figure 4 Elastic damping system
Frame, and considering that the safety tube cap coming out of the vibration hopper is horizontal, the punching die should be placed horizontally, that is, the punching task should be completed in the horizontal direction.
(4) This mechanism itself is a small punch and feeding mechanism, which solves the contradiction of occupying other punches.
(5) In the past production, manual feeding was used, which was often not delivered in place, and there was also a public injury accident involving pressing hands. This mechanism solves the problem of pressing hands and improves the feeding accuracy.
(6) The punch used in the past has large power, large power consumption during production, and high cost. The power consumption of this institution is 500W, which greatly saves energy and reduces costs.
(7) The invention adopts stepless speed change, which can adjust the punching speed arbitrarily. [3]
