Auto roll punching machine review notes r
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This document describes the design and construction of an automatic roll punching machine that uses a geneva wheel mechanism to feed metal sheets automatically for punching. The machine aims to reduce setup and punching times compared to conventional manual punching. It consists of two sections - a geneva wheel and chain drive that moves metal sheets, and a crank wheel and connecting rod that converts rotational motion into linear reciprocating motion of the punch tool. When switched on, the motor rotates the crank wheel to punch holes in the automatically fed metal sheet. The geneva wheel indexes with each revolution to advance the sheet for the next punch. This low-cost automatic punching machine reduces labor costs and improves output efficiency.
Auto roll punching machine review notes r
- 1. FABRICATION OF GENEVA WHEEL BASED AUTO ROLL PUNCHING MACHINE OBJECTIVE; 1. To reduce the job setting ,marking and punching time 2. To reduce the labour cost by providing automatic job feeding and punching machine. DEFINITION OF PROBLEM; In conventional punching machine, the job is to marked before punching operation and set the alignment of the work piece with the punch tool. Moreover the job is feeded manually for every punch holes. Due to the above reasons, the entire process takes more time for series of punching hole operations. In this geneva wheel intermittent drive, the job is feeding automatically during the return stroke of punching operation. SCOPE OF THE PROJECT; Operation is very smooth and in this system we can get more output by applying less effort. Simple construction by introducing geneva wheel disc drive transmission. The job is feeded automatically. Low cost automation Less maitenance ABSTRACT; In this auto roll punching machine consists of two sections.One sections is automatic metal sheet feeding mechanism and the second section is conversion of rotary motion into linear reciprocating motion of punching tool . The first section consists of geneva wheel disc keyed with a shaft at one end and the other end is
- 2. connected with chain sprocket wheel. This geneva wheel shaft is supported on two plummer block bearings. This sprocket wheel transmit the rotary motion from the geneva wheel to the metal sheet feeding rollers through a chain drive. Hence when the geneva wheel is rotated , the metal sheet also moved for punching operation. Working principle; When the switch is ON , the motor rotates the crank wheel. Hence the punching slide with punching tool moved up and down and make a punch on the metal sheet. The crank wheel face have a pin which touches the slot in the geneva wheel and also rotates (indexing) the geneva wheel .Due to the rotation or indexing of geneva wheel , the metal sheet feeding rollers are rotated through the chain drive mechanism and hence the metal sheet is feeded automatically. Construction; In this auto roll punching machine consists of two sections.One sections is automatic metal sheet feeding mechanism and the second section is conversion of rotary motion into linear reciprocating motion of punching tool . The first section consists of geneva wheel disc keyed with a shaft at one end and the other end is connected with chain sprocket wheel. This geneva wheel shaft is supported on two plummer block bearings. This sprocket wheel transmit the rotary motion from the geneva wheel to the metal sheet feeding rollers through a chain drive. Hence when the geneva wheel is rotated , the metal sheet also moved for punching operation. The second section consists of electrically operated DC motor,plummer block bearings, crank wheel with a pin ,connecting rod and punching tool. The second section is used to convert the rotary motion of the crank wheel into reciprocating motion of punching tool. The rotating shaft is keyed to the crank wheel at one end and the other end is connected to DC motor. This shaft is supported on two
- 3. plummer block bearings. The punch tool slide is reciprocated by the connecting the crank wheel through the connecting rod .The metal sheet is feeded automatically by the rotation of geneva wheel. ADVANTAGES ; Compared to hydraulic and ,pneumatic system, it is economical. No extra skill is required for operating this system. Operation is very smooth and in this system we can get more output by applying less effort. APPLICATIONS It is very much useful for making series of holes of same diameter and constant pitch. Thus it can be useful for punching application COMPONENTS USED FOR AUTO ROLL PUNCHING MACHINE S.NO COMPONENTS USED MATERIAL SIZE QUANTITY 1 M.S.FABRICATED STAND(SQUARE TUBE) MILD STEEL 500X750X300 MM 1
- 4. 25MM (WXHXD) 2 24 VDC MOTOR ALUMINIUM 10 KG TORQUE 1 3 CRANK DISC PLATE 8MM THICKNESS MILD STEEL 150MM DIA 1 4 GENEVA WHEEL DISC 8MM THICKNESS MILD STEEL 150MM DIA 1 5 PLUMMER BLOCK BEARING CASTING BODY(COVER) 20MM DIA 2 PAIRS 6 PAINT ENAMEL 500 ML 1 7. CONNECTING ROD MILD STEEL 25MM X 6MMX 1200 WXTXL 1 8 CHAIN WITH SPROCKET CARBON STEEL 1600MMX 20MM 1 SET 9 JOB FEED ROLLERS MILD STEEL 25MM DIAX 250MM 2 10 PUNCH TOOL HARDENED MILD STEEL 6MM DIA 1 11 METAL PRIMER PAINT ½ LITRE 1