Improvement of the test equipment for the shuttle bottom spring
Strength, energy conservation and operational safety.
0 Introduction The bottom plate spring (hereinafter referred to as the “bottom springâ€) is an important accessory of the shuttle, which supports, positions and resets the bobbin in the shuttle. The height of the spring of the spring determines whether the shuttle can be used normally; therefore, testing the elasticity of the spring is a test procedure, which becomes an important process in the manufacturing process of the spring, and the spring test equipment becomes a key equipment.
We have designed and manufactured a test machine with excellent performance by thoroughly renovating the original backward equipment, and achieved good practical results.
1 The necessity of the test bomb The bottom spring is heated by a certain size of medium carbon steel and extruded by a special mold. As shown, A is the bottom spring support arm and B is the bottom spring pressure arm. The formed bottom spring has a certain hardness and elasticity after heat treatment. In the process of production and processing, due to the limitations of the heat treatment process equipment, the treated reed spring needs to be tested to test the spring with insufficient elasticity or excessive hardness to cause breakage; another important role of the test shell is to correct the shape of the spring. To achieve the size and shape accuracy specified in the industry standards.
A-support arm; pressure arm.
The bottom plate spring indicates that the original equipment of the original test equipment is a 10t punch with a special mold. The shape of the template under the mold is similar to the contour of the bottom spring pressing arm B. When the upper punch presses down the recess of the spring support arm A (see the description), the worker feeds the springs one by one with each finger. Into one, pedal the pedal pedal, press the punch down once, complete the test bomb on a bottom spring. In this way, the finger punching punching danger zone is only 9mm (the width of a bottom spring). The hands and feet of the workers are used together. According to the quota, the feeding, pedaling and punching test of a bottom spring are completed every 3s to make the spirit highly concentrated and nervous. It is very prone to stamping injury accidents; at the same time, it has high labor intensity and low labor efficiency. In addition, because the bottom spring has no positioning during the test, the centering effect is poor, easy to bias, missed inspection, product quality is difficult to guarantee.
3 improve the principle and use of the equipment for the above-mentioned equipment defects, we use 7t punch for redesign. The external gear-toothed ratchet rocker mechanism is used to drive the turntable to complete the test process of the workpiece, that is, feeding, punching and unloading.
The improved organization diagram is as shown. The turntable 10 is coupled to the support disk 9 by a shaft 11 having dozens of stations thereon. When the punch slider 2 moves up and down, the swash plate 4 reciprocates accordingly, pushing the roller 3 on the connecting rod 8 to roll, thereby driving the connecting rod 8 to reciprocately swing, and the pawl 7 on the connecting rod moves the ratchet 5 to rotate through a certain angle. The turntable 10 is also rotated through the same angle to complete the feeding of the workpiece. A check pawl 6 is fixed in the 90* direction with the pawl to prevent the ratchet from rotating in the reverse direction.
During operation, the worker is away from the stamping danger zone, and the spring is simply placed in the turntable, and the workpiece is accurately fed into the machining position as the turntable rotates to perform the stamping test. If the elastic spring is good, the support arm A is pressed down, and its outer dimensions can meet the requirements of the industry standard, which is regarded as a good product; if the elastic state is poor, the support arm A is pressed down, the outer dimensions are not up to If the requirements are required or a break occurs, it is considered as a non-conforming product.
4 improved effect 4.1 improve the product quality of the turntable under the ratchet, the workpiece position is accurate, neutral (downward page 50) 0.08%, combed strip is 0. 03% ~ 0.05%; Advantages; 4 reduce fiber loss by 5%; 5 eliminate pre-compaction, roll, roll, and combing multiple processes, greatly shortening the spinning process.
3 Conclusions 3.1 Traditional carding machine doffers have insurmountable defects.
The main performance is that it is easy to produce a large number of fiber hooks, and it is a high-incidence area of ​​cotton neps. The doffer speed is inversely related to the improvement of production quality.
3.2 Two new doffer organizations have overcome the traditional deficiencies of the doffers, and have pointed out ideas for further shortening the process flow to improve product quality and output, which provide a reference for us to further study the new doffer institutions. 3.3 Carding workers should pay attention to the above new trends in order to speed up the development of new doffer institutions with Chinese characteristics and contribute to the development of China's carding machines to catch up with the new level of world carding machines.
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