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In the present paper we describe the operation of the automatic press tool for calibrating cermet bushings and rings, The tool was made and tested at the Base Laboratory of the Belorussian Polyteehnical Institute; it is approved by the Special Commission of the Ministry of Higher and Secondary Technical Education of the USSR and was shown in the Education Pavilion at the Exhibition of the Achievements of National Economy.
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The automatic press die is fundamentally new in design and is intended for calibrating cermet bushings with a height to external diameter ratio H/D - 1/2. Its design is based on the ca-libration method described by us in the journal Poroshkovaya Metallurgiya, No. 3, 1961 in the article entitled: "New Method of Calibration of GermetParts".
The automatic calibration die (Fig. 1) consists of two main parts: the loading unit and the die proper. Both parts are mounted on a general-purpose hydraulic or any other press of suitable size. Each cycle of the die is performed during a double stroke of the press. The hopper-type loading unit feeds inpidual parts into the die. The feed plate 1 is operated by the connecting member 2 which is secured to rod 4 of the press. During the upward motion the plate 1 takes from the hopper several parts 5, which roll in chute 3 to the feeder (Fig. 2). During a double stroke of the press ram the feeder supplies only one part through the helical chute into the calibration die. The helical chute changes the part from a vertical into a horizontal position. Thereupon the part fails through thecatching tube 6 onto the receiving platform of pusher 7 operated by wedge 8. At the required moment the pusher rotates lever 9 which, in turn, moves plate 10 acting as a support for the self- aligning punch 11.
Fig. 1. Automatic calibration die (axiometric representation). For explanation see text.
During the upward motion of the wedge the pusher is returned by springs 12 into the initiat position, moving at the same time one part into the calibration zone. The spherical surface of the moving punch automatically aligns the bushing. During the calibration, plate 10 is pressed against the base of the tool by the moving die. After the pressure has been released the shock absorber 14 slightly lifts die 13 with the self-aligning punch, thus releasing plate 10, which during the reciprocating motion pushes the calibrated part out from the tool. Figure 3 shows the drawing of the press tool,
The automatic calibration die is to some extent universal. It can be used for calibrating ring-type parts with an external diameter from 10 to 50 ram. The change to other diameters is effected by replacing the exchangeable calibrating parts of the device. The working parts of the stationary die and the punch can be made from alloy steels or cermets.
The output of the tool depends on the number of strokes per minute of the press ram, When used with the RUE-40 press its output is about 1000 parts per hour.
在本论文中，我们描述的自动冲压模具的操作校准套餐衬套和环，工具制造和测试在白俄罗斯理工学院基础实验室进行；它是由苏联高等和中等职业教育特别委员会批准，用以在展览馆中展示国民经济成就。8428
自动冲压模具在设计上基本上都采用了新的设计方法，用于校准金属陶瓷衬套高度与外部直径比H/D- 1/2.它的设计是基于电磁场振动方法，在1961年的“粉末烧结冶金”这本书中的第三期可以找到关于它的描述，文章的标题是“关于硬质合金钢校准的新方法”
自动校准模(图1)包括两个主要部分:加载单元和模具适当。这两个部分是安装在一个通用的液压或任何其他出版社的合适的尺寸。每个周期的死是一个双中风期间执行的新闻。料斗式加载单元提要的各个部分到死。提要板1是由连接成员2这是固定在杆4的新闻。在向上运动的板1需要从料斗几部分5,卷在溜槽3到给料机(图2)。在双冲程的压力机滑块的给料机只提供一部分通过螺旋溜槽进入校准模。螺旋溜槽的变化从一个垂直的部分到水平位置。于是部分材料部能用推杆7，使之经过链接管到达推楔8的操作接收平台。在所需的力矩的推杆式旋转杆9,这反过来,移动板10作为支持自我调整冲头11。