Closed punch guards compared with the open-punch

     Compared with open punch, punch with a closed large tonnage, long stroke, slow, table size and other characteristics. Closed punch clutch, brake friction structure, manipulating the way for the electric steering, you can control the slider at any position of travel stop. Closed practices are also open punch punch different, more jobs for the people, hand feeding, hand out the pieces. Due to the large size of the workpiece, the larger the magnitude of the workers operating the operation. Because of the closed punching slow, operator efficiency and give full play to maintain good clutch brake system devices, often carried out by continuous stroke operation, which makes the operation extremely tense. Some large installed closed punching a few pair dies, many operators to work simultaneously on a single punch, action officers require more coordination between Gao.

Because of these characteristics, guards closed and open punch punching setting have a lot of do not ask requirements.

        (1) Closed punch guards should be able to meet the job specification continuous stroke, so that the operator presses haste continued under operating conditions can get effective protection.

        (2) Closed punch guards should be able to meet the needs of more than a job, workers should make all participants can effectively control the movement of the slider (in particular responsible for the feeding, the staff will be expected to master the punch slider should start and stop).

        (3) Closed punch guards adaptation tune easy installation, standardized can be adjusted to meet the needs of a variety of jobs.

    Closed presses equipped with protective devices, than open punch in a simple structure without transformation of the clutch brake system.

    Closed punch slider velocity than steamed bread, the threat to the operator's feeling inferior to open serious punch. But closed punch brake angle is large (10 degrees -15 degrees), slide large decline, from sender to complete braking time is longer, and this is an important and open-punch different points.

    Closed punch danger zone around the crank angle range of 30 degrees to -100 degrees, enough to carry out all kinds of protective devices are protected within this range. Protector of the whole trip in a closed punch too much interference on the job, often resulting in punch parking, and therefore can not work properly.