Part Development - Pinion Shaft

Contents

CONTENTS:

Process Part

1. Assigning a Part to a Subassembly

2. Determination of annual output volume and production type

3. Part Constructability Analysis

4. Selection and justification of procurement method

5. Selection of process bases

6. Develop Procurement Route

7. Calculation of operating allowances

8. Calculation of cutting modes

9. Calculation of instrumentation

Design Part

10. Calculation of accessory

Application

List of literature

Process Part

Assigning a Part to a Subassembly

The pinion shaft is used as a high-speed shaft in cylindrical gear reducers. It rotates in the gearbox housing installed on two bearings. During operation, the part is subjected to a bending moment, which appears due to the shape of the teeth, the torque transmitted by the gear shaft from the engine to the wheel. In addition, the teeth are subject to friction in the engagement zone. A feature of this part is the alignment of the shaft and gear, which reduces the range of components, increases the bearing capacity of the shaft-gear connection, and makes the unit more compact.

Cylindrical gear reducers are used to convert the engine torque and speed to the values ​ ​ required by the working elements of the machines. During operation, the resistance to movement of the working element changes, which leads to fluctuations in loads on the whole reduction gear in general and on its elements in particular. In addition, during launches, braking, jerks occur, which are also transmitted to the elements of the reduction gear box.

Selection and justification of procurement method

Considering the most common options for obtaining a blank, I came to the conclusion that the most suitable for my task is a blank obtained from stamping in a closed die on a crank hot stamping press.

Selection of process bases

A process base is a base used to determine the position of a workpiece or article in its manufacture or assembly.

Selection of process bases is one of the complex tasks of process design. The right choice of technological bases largely depends on:

- accuracy of obtaining the specified dimensions;

- correctness of mutual arrangement of surfaces;

- degree of complexity of technological equipment, cutting and measuring tools.

Operation 005 Milling and Centering:

Process base - unprocessed surface ∅40 mm, molding slope.

Operation 010 Turning (Rough):

Process base - processed end face ∅24 mm, centering holes ∅3,15 mm.

Operation 015 Turning (Rough):

Process Base - Processed End Face ∅40 mm Processed Over

wearing ∅37mm.

Operation 020 Turning (Finished):

Process base - alignment holes ∅3,15mm, end face ∅35,4

Operation 025 Turning (Finished):

Process base - alignment holes ∅3,15mm, end face ∅20,4

Operation 030 Turning (Finished):

Process base - Alignment holes ∅3,15mm, end face ∅20,4mm.

Operation 035 Dental:

Process base - alignment holes ∅3,15 mm, end face ∅20,4

Operation 040 Milling:

Process base - treated surface ∅35,4 mm, torets∅20,4mm

Operation 045 Turning:

Process base - treated surface ∅32,4 mm, end face ∅70mm

Operation 050 Round Grinding:

Process base - alignment holes ∅3,15 mm.

Develop Procurement Route

Activity 000 Procurement:

The blank is obtained on a crank hot stamping press.

Operation 005 Milling and Centering:

Process the workpiece in the size of 129mm.

Operation 010 Turning (Rough):

Turn surfaces ∅21mm by length 29,∅37mm by length 45,∅43mm by length 8, ∅71mm, round R2, chamfers.

Operation 015 Turning (Rough):

Turn surfaces ∅37mm by length 17.4, ∅43mm by length 8, round

R2, chamfers.

Operation 020 Turning (Finished):

Turn surfaces ∅35,4mm by length 17.8, ∅42mm by length 8.2, ∅70mm,

R2 round, chamfers, groove ∅34,5mm.

Operation 025 Turning (Finished):

Turn surfaces ∅20,4mm by length 30.3, ∅32,4mm by length 53mm,

∅35,4mm, ∅42mm, ends ∅42mm, ∅70mm, 4 chamfers 1x45, cone 15 by length

3 mm, round R2.

Operation 030 Turning (Finished):

Drill the grooves ∅19,5mm, ∅34,5mm, ∅31,5mm, ∅33mm

Operation 035 Dental:

Mill teeth m = 2.5mm, z = 26.

Operation 040 Milling:

Mill the keyway.

Operation 045 Turning:

Drill the hole, countersink, thread.

Operation 050 Round Grinding:

Grind surface ∅35k6, grind surface ∅35k6,

grinding the surface ∅32h8, grinding the surface ∅20h8,

grind end face ∅40mm, grind end face ∅40mm

List of literature

1. Handbook of engineering technologist. In 2 vols. T.1/Ed. A.G. Kosilova and R.K. Meshcheryakova. - 4th ed., Conversion. and additional - M.: Engineering, 1985. 656 s., Il.

2. 1 Handbook of the technologist-machine engineer. In 2 tons. T. 2/Ed. A.G. Kosilova and R.K. Meshcheryakova. - 4th ed., Conversion. and additional - M.: Engineering, 1985. 656 s., Il.

3. Course design in the subject "Engineering Technology" Dobrydnev I.S. - M: Engineering, 1985. 184 s., Il.

4. Toolmaker's Handbook/I.A. Ordinartsev, G.V. Filippov, A.N. Shevchenko and others; Under the gener. ed. I.A. Ordinartseva. - L.: Engineering. Leningr. department, 1987. 846 p.: il.

5. Devices for metal cutting machines. M.A. Anserov. - M.: Engineering, 1964. 652 p.: il.