Calculation of exhaust press mechanism - DBE, Drawings

Contents

Task

Introduction

1. Kinematic Mechanism Analysis

1.1. Design of crank-slider mechanism

1.2. Structural study of the mechanism

1.3. Building a Mechanism Diagram

1.4. Build mechanism speed plans

1.5. Build mechanism acceleration plans

1.6. Flywheel Calculation

2. Power calculation of lever mechanism

2.1. Determination of driving force P (force of gas pressure on piston)

2.2. Defining Link Inertia Forces

2.3. Definition of reactions in kinematic pairs of Assur II class groups of the 2nd form

2.4. Power calculation of the mechanism driving link

2.5. Determination of balancing force by the Zhukovsky method

3. Design of cam mechanism with translational pusher

3.1. Defining Minimum Cam Radius Rmin

3.2. To Create a Cam Profile

4. Planetary Mechanism and Gear Design

4.1. Kinematic study of the planetary mechanism

4.2. Planetary mechanism design

4.3. Involute Engagement Design

List of literature

Introduction

The object of the study is the mechanisms of the exhaust press .

The mechanisms of the exhaust press include various mechanisms from which to study - lever, gear, planetary and cam.

The lever mechanism serves to convert the reciprocating movement of the slider 5 from the rotational movement of the crank 1.

From the crank, rotational motion is transmitted through the gearing z1 and z2. In lever mechanisms angular velocity is unstable and flywheel is installed on crank shaft for more uniform movement.

To control the clamping of parts, a cam mechanism is used, which is used to convert rotational motion into translational motion of the driven link.

3.2. To Create a Cam Profile

From an arbitrary point O, we draw a circle of radius Rmin. From point 0 up, we postpone the movements of the pusher taken from the graph. Get points 1, 2, 3.... 15, 18. The farthest point 9 is connected by a straight line to the point O and this radius conducts a circle. From the line O-9 we lay phase angles fu = 65 °, ° and = 65 °. Angles must be set aside against cam rotation. Circular arcs. corresponding to the phase angles fu and divided into 9 equal parts, we obtain respectively points 1 *, 2 *,.... 8,*, 9*. 10*, . . . ,18*. These points are connected to the center of O. Then, from point O (center of cam rotation), we conduct arcs with radii O1, O2, O3, etc., before intersecting with the corresponding segments. Get points 10, 20, 3o,..., 18o. By connecting these points of a smooth curve, we get a theoretical cam profile.