Design and Development:Swing frame testing fixture for Bandsaw Machine.

Created By: Mr. KOLI VAIBHAV S. Mr. ZADE VIKAS R. Mr. DATAR SHREEKAR R. Mr. BHOSALE DHANANJAY B.

Guided By: Prof. Mr. P. S. BADAKAR

Abstract: The aim of project is to reduce the inspection timing with proper alignment & drilling holes . Also with increase in accuracy, precision & reliability on fixture of swing arm of band saw type machine. This proposed method has to design & fabricate the fixture to reduce the manufacturing cycle time.

Testing Fixtures for Swing Frame

Company Profile

Name : SPM tools Pvt. Ltd.

Address : Plot No. 2 to 8, Sector ‘A’, Parvati Co-op. Ind. Estate,

YADRAV-416145. Dist.- Kolhapur, Maharashtra (India).

Type of Firm : CNC, Band Saw & Special Purpose Machines.

Website – www.spmtools.co.in

Year of Establishment – 1984

Total Shifts – General

Horizontal Band Saw Machine (HBM250)

Band saw machine is power tool, uses blade to cut the metal rods (250 mm).

The cutting blade rotating on 2 wheels in the same plane.

Swing Arm

Two wheels are mounted on swing arm.

Overall weigh approx 35-40 Kg.

Introduction Fixture is work holding device that holds,

supports & locates the work piece for a specific operation but does not guide the cutting tool.

. The main purpose of a fixture is to locate & in some cases hold a work piece during either a machining operation or some other industrial process

Need of Fixture Easy, quick and consistently accurate

locating, supporting and clamping. Guidance to the cutting tool like drill,

reamer etc. To reduce operator’s labor and skill –

requirement To reduce measurement and its cost. Increase in productivity and maintain

product quality consistently.

Material Selection

Fixture

Resting Pad

Clamping

Locating Pin

Mild Steel

EN24

EN8

EN353

Purpose of Selection MS for Fixture: High strength & malleability, quite soft. Desirable weldability & machinability. EN24 for Resting Pad: Excellent machinability & wear resistance. Good hardness & tensile strength. EN8 for Clamping: Good tensile strength, machinable in any

condition, enhanced wear resistance.

Design Principles Total machining time for workpiece is

minimize. Easy & quick loading & unloading of

workpiece. The fixture should be open as possible to

minimize cheap or burr accumulation. Sufficiently stiff to secure the preset

accuracy of machining.

Experimental Drafting

Jigs & Fixtures in Aircraft Industries

Experimental Design

Final Drafting

Final Design

Fixture Fabrication

Working Procedure First of all two pieces of 5 m long "C"

channels along with 1 m extra channel is taken for cutting process.

These pieces are fabricated (welded) with number of joints to form a bed.

Plates are welded above base at respective positions.

Cylindrical components attached to the plates by screws & welding joints.

Assembly Drafting

Assembly Design

Testing Procedure

SWING

FRAME

LEFT

WING

RIGHT

WING

DECISION

A +1 +0 -2 +0 +2 +3 +4 +0 -1 Accepted

B -2 +3 +5 -3 +2 +1 +0 -6 +4 Rejected

C -1 +4 +0 -1 -2 +0 +1 +3 -2 Accepted

Swing frame mounted on fixture with horizontal zero level stoppers attached.

Drilling tool of machine is placed over points where drilling should be done and values of bend tested as below.

Allocation Plates Designs

‘E’ Plate ‘C’ Plate ‘O’ Plate

Plate Allocation

‘E’ Plate ‘C’ Plate ‘O’ Plate

Cost Estimation

Sr.

No.

Name of component Price in Rupees

1 Welding cost 19000

2 Machining cost 5000

3 Clamping 400

4 Resting 10000

5 Locating 700

Advantages Minimize the possibility of human error. Permit the use of medium-skilled labour. Reduce the manufacturing time. Allow the production of repeat orders

without retooling. The directions of motion for make drill is organised

& deterministic. The total time for make fix work piece & release in

short.

Conclusion The fixtures are very important part of

manufacturing systems. The fixtures of appropriate design may be used to restrict certain of the unbalanced forces, and thus reduce the requirements of control by the operator.

Understanding how to design and development of inspection fixture will help to get more accuracy, alignment & testing measurements along with production of swing frame.

References www.spmtools.ac.in User manual of respective machine. Reference book of Production Engineering by P.

C. Sharma. Reference book of Manufacturing Engineering by

P. G. Deshpande. Brochure and Catalogues

Thank

You