Beehive Coal Forming Machine 1, working principle and process action process Stamping type honeycomb coal molding machine is the main production equipment of China's towns and cities honeycomb coal (usually also known as coal cake, a number of through holes punched out of the cylindrical cake coal) production plant, which will be added to the powdered coal on the turntable in the mold cylinder, through the punch stamping into a honeycomb coal.　　　　In order to realize the honeycomb coal stamping molding, stamping type honeycomb coal molding machine must complete the following actions: powdered coal feeding; punch will be honeycomb coal compression molding; clearing the punch and out of the coal tray of the accumulation of debris of the chip sweeping movement; will be in the mold cylinder after the stamping of the honeycomb coal demolding; will be pressed into shape honeycomb coal conveying carton.　　　　2, the original data and design requirements of the production capacity of the honeycomb coal molding machine: 30 times / min; drive motor: Y180L-8, power N = 11 kW, rotational speed of n = 730 r / min; stamping and molding of the production resistance to reach 50,000 N; in order to improve the quality of the honeycomb coal molding machine, I hope that after stamping there is a short time to hold the pressure; as the punch To produce a larger pressure, it is hoped that the stamping mechanism has the function of increasing force, in order to increase the effective effect and reduce the power of the prime mover.3, design scheme hints stamping honeycomb coal molding machine should be considered for the selection and design of the three mechanisms; stamping and demolding mechanism, chip sweeping mechanism and intermittent movement mechanism of the mold cylinder turntable. The stamping and demolding mechanism can adopt centering crank-slider mechanism, offset crank-slider mechanism, and six-bar stamping mechanism; the chip-sweeping mechanism can adopt additional slider-rocker mechanism, and fixed-moving cam-moving follower mechanism; and the intermittent motion mechanism of the die cylinder turntable can adopt grooved-wheel mechanism, incomplete-gear mechanism, and cam-type intermittent motion mechanism. In order to reduce the speed fluctuation of the machine and select a smaller power motor, can be attached to the flywheel. 4, the design task according to the process action requirements of the motion cycle diagram; stamping mold release mechanism, sweeping and brushing mechanism, die cylinder carousel intermittent motion mechanism selection; mechanical motion program evaluation and selection; flywheel design (optional); according to the selected motor and actuator parameters of the motion of the proposed mechanical transmission program; draw the mechanical motion program sketch; on the transmission of the program (optional). Mechanical motion program sketch; drive mechanism and actuator motion size calculation. (8) Provide a design summary statement (not less than 3000 words).　　　　　　　　　　　　　　　　　　　　　Stamping type honeycomb coal molding machine motion scheme design guidance I. Stamping type honeycomb coal molding machine function and design requirements 1, the function of stamping type honeycomb coal molding machine is the main production equipment of China's towns and cities honeycomb coal (usually also known as coal cake, a number of through holes punched out of a cylindrical cake of coal) production plant, which will be added to the powdered coal in the die cylinder on the turntable, through the punch stamping into a honeycomb coal. In order to realize the press molding of honeycomb coal, the press type honeycomb coal molding machine must complete the following actions: coal powder charging; punch to press the honeycomb coal into shape; chip sweeping movement to remove the accumulated chips from the punch and the coal discharging plate; demolding of the stamped honeycomb coal inside the die cylinder; and delivery of the stamped honeycomb coal to be packed in boxes.2, the original is the data and the design requirements 1) the production capacity of the honeycomb coal molding machine: 30 times / min; 2) Drive motor: Y180L-8, power N = 11 kW, speed n = 730 r/min; 3) As shown in Figure 1 bit punch 3, demolding disk 5, chip sweeping brush 4, mold cylinder turntable 1 mutual position situation. In fact, the punch and the demolding disk are integrated with the up and down moving sliding beam 2, when the sliding beam is downward punching the punch presses the coal powder into honeycomb coal, and the demolding disk demolds the honeycomb coal that has been pressed into the mold. During the upward movement of the slide beam, the sweeping brush removes the coal dust adhering to the punch and the demolding disk. The die cylinder is evenly distributed on the die cylinder turntable, and the intermittent movement of the turntable makes the die cylinder after charging enter the pressurized position, the die cylinder after forming enter the demolding position, and the empty die cylinder enter the charging position; 4) In order to improve the quality of the honeycomb coal forming machine, it is hoped that there will be a short holding time after stamping; 5) Since the punch pressure is large when punching two coal cakes at the same time, the maximum can be up to 50,000N, and the pressure change is approximated to be half of the punch entering stamping, and the pressure is in the range of 1 to 3 times the pressure. The pressure change is approximated as half of the stroke into the stamping, and the pressure changes linearly from zero value to the maximum value. Therefore, it is hoped that the punching mechanism has the function of increasing force to reduce the speed fluctuation of the machine and reduce the power of the prime mover. 6) The mechanical movement program should strive to be simple. Second, the working principle and process action decomposition according to the above analysis, stamping type honeycomb coal molding machine requires the completion of the process action has the following six actions: 1) feeding: this action can be used to open the hopper of the gravity of the coal powder to automatically add material; 2) stamping molding: the requirements of the punch head up and down reciprocating movement, one-half of the stroke of the punch for the stamping of molding; 3) demolding: the requirements of the demolding plate up and down reciprocating movement, the stamping of the molded coal cake and press down and out of the mold. (3) Mold release: the release disk is required to move up and down to press the stamped coal cake down and out of the mold cylinder. Generally it can be fixed with the punch in the up and down movement of the sliding beam; 4) chip sweeping: the requirements of the punch, demolding disk upward movement of the process of sweeping brush will be swept out of the coal dust; 5) mold cylinder intermittent movement: to complete the stamping, demolding and feeding of the three stations of the conversion; 6) conveying: the molded coal cake demolded on the conveyor belt after the drop to send out the finished product, in order to be boxed up and ready for use. The above six actions, feeding and conveying action is relatively simple, not to be considered for the time being, demolding and stamping can be completed with a mechanism. Therefore, the press type honeycomb coal molding machine motion program design focus on stamping and demolding agencies, chip sweeping agencies and mold cylinder turntable intermittent rotation mechanism of the three institutions selection and design issues. Third, according to the process action sequence and coordination requirements for the development of motion cycle diagram for stamping type honeycomb coal molding machine motion cycle diagram is mainly to determine the stamping and demolding plate, sweeping brush, mold cylinder rotary plate of the three executive components of the sequence, phase, in order to facilitate the design of the actuator, assembly and commissioning. The stamping mechanism of the press-type honeycomb molding machine is the main mechanism, with the zero angle of its main body as the starting point of the horizontal coordinates, and the vertical coordinates indicate the starting and ending positions of the displacement of each actuating member. Figure 2 represents the motion cycle diagrams of the three actuators of the press type honeycomb coal forming machine. Both the punch and the demolding disk consist of two parts: the working stroke and the return stroke. The working stroke of the die cylinder turntable is completed in the second half of the return stroke of the punch and in the first half of the working stroke, so that the intermittent rotation is completed before stamping. The chip sweeping brush is required to complete the chip sweeping movement from the second half of the return stroke of the punch to the first half of the working stroke. Fourth, the selection of actuators according to the punch and demolding plate, die cylinder turntable, sweeping brush of the three executive components of the action requirements and structural characteristics, you can choose Table 1 of the commonly used institutions, this table is also known as the actuator of the morphological matrix. Table 1 Morphological matrix of the three actuators punch and stripper plate mechanism centering crank slider mechanism offset crank slider mechanism six-bar stamping mechanism chip sweeping brush mechanism additional slider rocker mechanism fixed moving cam moving follower mechanism die cylinder turntable intermittent motion mechanism grooved wheel mechanism incomplete gear mechanism cam-type intermittent motion mechanism Fig. 3 (a) represents the additional slider rocker mechanism. The up and down movement of the slide beam is utilized to make the chip sweeping brush on the rocker OB sweep away the pulverized coal chips on the punch and the bottom of the stripper plate. Figure 3 (b) shows the fixed moving cam using the slide beam to move up and down so that the moving follower with the chip sweeping brush ejects to remove the chips on the punch and the bottom of the demolding plate. V. Selection and Evaluation of Mechanical Motion Programs According to the morphological matrix of the three actuators shown in Table 1, the number of mechanical motion programs of the pressed honeycomb coal molding machine can be found as follows: N = 3 × 2 × 3 = 18 Now, we can select the programs by giving the conditions, the compatibility of the various institutions and try to make the institutions as simple as possible and other requirements. As a result, two schemes with simpler structure can be selected. Scheme Ⅰ: the stamping mechanism is a centering crank slide mechanism, the die cylinder turntable is a grooved wheel mechanism, and the chip sweeping mechanism is a fixed cam moving follower mechanism. Scheme Ⅱ: the stamping mechanism is an offset crank slider mechanism, the die cylinder turntable is an incomplete gear mechanism, and the chip sweeping mechanism is an additional slider rocker mechanism. The two programs we can use the fuzzy comprehensive evaluation method to assess the preference, which is omitted here. Finally, scheme Ⅰ is selected as the mechanical motion scheme of the press type honeycomb coal forming machine. Sixth, the transmission ratio and variable speed mechanism of the mechanical transmission system are based on the selected driving motor speed and the production capacity of the pressed honeycomb coal forming machine. The total transmission ratio of their mechanical transmission system is as follows: the first stage of the mechanical transmission system adopts belt transmission, and its transmission ratio is 4.866, and the second stage adopts gear transmission, and its transmission ratio is 5. vii. Draw the mechanical motion scheme sketch according to the selected three actuator types and mechanical transmission system, draw the mechanical motion schematic diagram of the pressed type honeycomb coal molding machine. Which three actuators part can also be called mechanical motion scheme schematic sketch. As shown in Fig. 4, which includes the mechanical transmission system, the combination of the three actuators. If we add the feeding mechanism and conveying mechanism, it can be a complete representation of the mechanical motion scheme diagram of the whole machine. With the mechanical motion plan, you can carry out the movement of the mechanism size design calculations and the overall design of the machine. Eight, the mechanical transmission system and actuator size calculation in order to achieve specific mobile requirements, must be on the belt drive, gear drive, crank slider mechanism (stamping mechanism), groove wheel mechanism (die cylinder turntable intermittent movement mechanism) and sweeping cam mechanism kinematics calculations, if necessary, but also for kinetic calculations. 1, belt drive calculations (omitted, the mechanical design of a special explanation). 2, gear drive Calculation take Z1 = 22, Z2 = i × 22 = 5 × 22 = 110. Calculated according to the steel gear, take the module m = 5mm. Then d1 = Z1m = 110 mm. d2 = Z2m = 550 mm. the rest of the dimensions, according to the gear mechanism related to the calculation form to find out. 3, crank slide mechanism is known to stamping type honeycomb coal molding machine sliding beam stroke s = 300mm, crank and connecting rod length than that of the rod coefficient of λ = 0.175, then the radius of the crank is: R = δ / 2 = 150mm connecting rod length is: L = R /λ=955.41mm Therefore, it is not difficult to find out the change of speed and acceleration of the sliding beam (slider) in the crank-slider mechanism.4. Calculation of the grooved wheel mechanism1) The number of slots Z is selected as 6 according to the requirements of the work station.2) The center distance α is determined by the structural condition α=300mm.3) The radius of the round pin r is determined according to the structural condition r=30mm.4) The rotating angle of the active member in the grooved wheel each time of rotation 2α 2α=180 ( 1-2/z)=1205) slot angle 2β 2β= 360/z=606) the active part of the circular pin center radius R1 R1=αsinβ=150mm7) R1 and α ratio λ λ=R1/α8) grooved wheel outer radius R2 9) grooved wheel groove depth h h=80mm. 10) coefficient of movement k k=(z-2)/2z=1/3 (n=1, n for the number of circular pin) 5 、Sweeping chip cam mechanism calculation fixed cam adopts beveled shape, its length in up and down direction should be greater than the stroke s of the sliding beam, and its height in left and right direction should be able to make the sweeping brush meet the range of activity of sweeping the pulverized coal. Specifically according to the structure to design. Nine, stamping type honeycomb coal molding machine flywheel design due to the hope that the stamping mechanism has the function of increasing the force to reduce the speed fluctuation of the machine and reduce the power of the prime mover, so it is necessary to carry out the design of the flywheel in order to meet the functional requirements. The specific design process is omitted.