Exactly what is a gear rack?

Gear rack is a particular gear whose teeth are distributed on the strip.
1. The basic concept:
The rack can be divided into a spur gear rack and a helical gear rack, which are paired with a spur gear and a helical gear, respectively; the tooth profile of the rack is a straight line rather than an involute (planar for the tooth surface) , equivalent to the indexing circle radius is infinite cylindrical gear.
2. The main features:
(1) Since the tooth profile of the rack is direct, each point in the tooth profile has the same pressure position and is add up to the inclination angle of the tooth profile. This angle is named the tooth angle and the Rotary Air Compressor typical value is 20°.
(2) The same pitch and modulus are provided on any of the straight lines parallel to the top line.
(3) A series parallel to the top line of the tooth and having a tooth thickness add up to the width of the tooth groove is called a dividing range (middle line), which really is a reference range for calculating how big is the rack.
3. The main parameters:
Groove width, high tooth tip, high root height, tooth elevation, tooth thickness, root radius, etc.
4. The decision of parameters:
(1) Whether the equipment is beating, the full tooth depth, the normal normal range, the tooth path is qualified, the tooth pitch is poor, and the circumferential section error has gone out of tolerance.
(2) If the installation distance after the gears and racks are installed is suitable.
(3) The rack and gear meshing clearance should be 0.25* modulus.
(4) Whether the full tooth depth, runout, and common normal line of the rack are competent.
5. Processing methods:
Gear rack and pinion machining method:
(1) hobbing
(2) gear shaping
(3) shaving
(4) grinding teeth
(5) molars