The horn mouth crank bearing dismantling device

The horn mouth crank bearing disassembling tools - 2019 01 - 25' Project background. For further advance the authors synergies, ZhongYan industrial co. , LTD in hanzhong city in shaanxi province cigarette factories wrap workshop in order to eliminate all kinds of waste, optimize the allocation of resources, promote efficiency and benefit as the main target, further promote lean management in the workshop. Roll bag workshop KDF2 filter molding machine crank connecting rod mechanism is the cutting system of the machine drive, filter rod cutting work done by the horn mouth auxiliary cutter, the part is a typical of the crank rocker mechanism. Trumpet nozzle is installed on the rocker, rocker in the role of crank, approximate reciprocating linear motion. The needle roller bearing in the high frequency ( 8000 times/min) Reciprocating motion process, the reciprocating impact effect, bearing failure. The limited space, and when disassembling parts need to be that is associated with bearing, connecting rod are all removed, so bearing dismantling laborious. For the realization of the needle roller bearing quick disassembling positioning, shorten the disassembling time, improve work efficiency, in April, 2017, volume package workshop innovation QC team decided to make the bearing special removal tool. 【 Root cause analysis) Team analyzed the cause of the bearing are disassembling time-consuming, it is concluded that the main reasons are as follows: more than a change is bearing removal step. Need to loosen the drive pin shaft clamping screw, remove the pin and the nozzle, remove the counterweight block, remove the crank plate 15 steps, such as an average of 40. 3 minutes. Second, the needle roller bearing adjustment installation is difficult. The bearing must be installed in a hole in the center position, the position accuracy of & plusmn; 0. 02 mm, due to differences in mechanic proficiency, the guy on the difference is larger, the number of needle bearing adjustment manual operation is difficult to guarantee its middle and lead to the maintenance for a long time. 【 Countermeasures 】 First, make the horn mouth crank bearing positioning tool. For rapid and ensure that no damage of the demolition of the bearing parts, group for the freedom of connecting rod end constraint, will otherwise unstable cantilever structure into more stable four-bar linkage, supported by frame, the connecting rod free end cap on the rack, when directly remove the connecting rod bearing, prevent the connecting rod bending deformation or damage parts. In order to facilitate the use of different machines, making the sleeve separate tools, through the way of threaded knob to adjust the cantilever closely contact with rack. Second, make the horn mouth crank bearing removal tool. According to the size of inside diameter of the bearing, the use of bearing on steps. Telescopic removable design tools, ensure that force can evenly applied to the bearing. Third, make the horn mouth crank bearing installation tools. Refer to remove the tool structure, using the sleeve as the structure of the installation tools, the size of the installation tools and remove the tool. Will install tool design into three parts: the needle roller bearing in the front, the front slightly bigger than the size needle roller bearing, can drive bearing; The needle roller bearing in the bearing hole, can locate make the crank bearing; Hand the back-end, tap on a back-end, bearing in the bearing hole. 【 Project effect 】 After using the new tool, the installation precision of needle roller bearings, bearing service life by the original 59 days up to now 182 days, each year for every machine with only two needle roller bearing. Needle roller bearing dismantling steps by steps 15 reduced to 8, the average time from 40. Three minutes to eight minutes, reducing the impact on downstream production. （ Source: the Oriental tobacco)