The Scotch Yoke (also known as slotted link mechanism) is a reciprocating motion mechanism, converting the linear motion of a slider into rotational motion, or vice versa.The piston or other reciprocating part is directly coupled to a sliding yoke with a slot that engages a pin on the rotating part. As per the requirement of a shaper machine, the velocity of forward and return strokes must be different. As the bull gear rotates causing the crankpin to rotate, the sliding block fastened to the crankpin will rotate on the crank pin circle. It operates almost on the same principle as that of a shaper.. The shaper machine is a type of machine tool which uses the relative motion between workpiece and cutting tool. one is a forward stroke or cutting stroke and the second is backward or return stroke. To reduce the full machining time it is important to reduce the time taken by the return stroke. The table can also swivel in its own axis. If you have any doubts, you can feel free to ask and we will reply you as soon as possible. Against this, a finer feed is employed in finishing operations. In shaper, during working (cutting) stroke the tool block rests on the (a). A little consideration will show that the time taken during the right movement of the ram (i.e. In the forward stroke/cutting stroke, the tool has to travel at optimum cutting velocity for removing the material from the workpiece whereas in return stroke because it is idle stroke, the tool has to travel at maximum possible velocity to minimize the production time. In a shaper machine, the mechanism for tool feed is . The work piece is held rigidly in a vice (or clamped directly on the table). In other words, the mean speed of the ram during a cutting stroke is less than the mean speed during the return stroke. Since the crank link CA rotates at a uniform angular velocity, thus, the time taken during the cutting stroke (or forward stroke) is more than the time taken during the return stroke. This machine has linear motion and cuts in a linear toolpath. Shaper machine works on the quick return mechanism. Also, we have a great variety of pre-made project kits â¦ Or overhead line shaft through a. tool base (d). This site uses Akismet to reduce spam. Shaper machine works on the quick return mechanism. The shaper holds the single point cutting tool in ram and workpiece is fixed in the table. We have also Facebook community for you guys, if you want, you can join our community, here is the link to our Facebook group. A tool head holds the cutting tool and make its movement in vertical and Angular directions. The ratchet and pawl mechanism will be used for obtaining the intermittent-feed in shaping operation. Shaper machine works on the quick return mechanism. In shaping machine the vertical slots are provide on one side of the shaping machine. DEPARTMENT OF Page 6 A shaper is a type of machine tool that uses linear relative motion between the work piece and a single-point cutting tool to machine a linear tool path. It has a base, column, saddle, clapper box, cross rail, reciprocating ram holding the tool adjustable for cutting stroke, tool head at front of the ram etc. Nowadays, Industries try to achieve high ï¶ The tool reciprocates over the work. Shaper consists of a hollow machine bed made of cast iron which rests on the ground. The bull gear is a large gear mounted within the column. Which of the following mechanism is used in shaper machine (a). Abstract:- A shaper is used to machine a single job by using a single point cutting tool and hence it cannot be used for high production rate. The explanation for this concept was presented under types of Shaper machines. The ram holding the â¦ To do this job, a mechanism called a clapper box with the Rocker ARM will be used to minimize the tool wear. Here the work piece is fixed on the machine table and the cutting tool is placed on the work piece. In this post, you'll learn what is Jig Boring Machine. In a shaper, the rotary movement of the drive is converted into the reciprocating movement. The shaping machine is used to machine flat metal surfaces especially where a large amount of metal has to be removed. In some latest types of shapers, can driven feed mechanisms are provided which are more efficient and provide a wider range of feed.