Door-Mounted Guitar Display Fixture

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1 Door-Mounted Guitar Display Fixture Group 2 Submitted to Professor Richard L. Roberts Professor Peter Rourke June 11, 2010 By Eric D. DuComb Derek Iredale Matthew Bury Wentworth Institute of Technology MECH 690 (DuComb) ducombe@wit.edu 1012 High St Palmer MA (Iredale) iredaled@wit.edu 22 Sunset Terrace Merrimac, MA (Bury) burym@wit.edu Dartmouth, MA

2 Introduction & Summary: Breaking of musical instruments during a rock performance has been a spectacle for concert audiences to behold for many years. Unfortunately, this action can be a lot less spectacular when it happens offstage at casual guitar player s home, due to an accidental bump that caused the guitar and its stand to make hard contact with the floor. Customers searching for the appropriate guitar display for their homes have a very limited amount of options with the currently available products. Furthermore, each known product has certain drawbacks or flaws that leave room for accidents to occur. It is for these reasons that the group has decided to create a design that will offer more options to customers seeking to purchase a display fixture for their guitar. The following proposal will demonstrate the plan to create a Door-Mounted Guitar Display Fixture that will allow users to safely mount their guitar behind any interior door. The following sections will describe, in depth, how the group plans to go about researching and developing this system in a logical manner through the use of work planning, design matrix development, and budgeting. Clear objectives and functional requirements have been listed to effectively judge the project upon completion. Additionally, one will find needs assessment, some preliminary research surrounding the flaws of currently available products that aim to be solved in this design, and some further predictions for the future of the Door-Mounted Guitar Display Fixture. 2

3 Table of Contents: Problem Definition Literature Review / Background Research Need Objective Functional Requirements Work Plan Qualifications Budget The Projects Future Bibliography Appendix Appendix

4 Problem Definition: In today s market there is a very limited amount of options when it comes to displaying guitar inside one s home. There are no guitar display fixtures on the market that can keep a guitar off of the floor and out of harm s way, without the requirement of permanent drilling into the wall. The problem to be solved by this project involves using an interior door to safely mount and display an electric guitar. Literature Review / Background Research: When it comes to guitar displays there are currently a few popular designs for musicians to choose from. The first design is a tripod floor stand. This tripod floor stand (also known as GS-1) consists of three legs at a low pitch that support a vertical member. This vertical member holds the guitar with two U-shaped hooks. The hook at the top of the hangar supports the neck of the guitar, making contact with the midsection of the guitar s neck. The second U-shaped hook supports most of the load by holding the guitar at the bottom of its body. The pitch created by these two hooks causes the guitar to lean backwards slightly. These hooks are lined with a soft rubber sleeve to protect the guitars surface from damage and to keep the guitar on the hooks with a high coefficient of friction. 4

This hook is a lot thicker than the hooks used in the tripod floor stand, as it must support a heavy bending load.

5 The wall mount utilizes similar U-hooks like the tripod floor stand but in a very different way. Instead of using two hooks to secure the guitar at the bottom of the base and the neck, the wall mount uses one hook to bear the load of the guitar just below the headstock. This hook is a lot thicker than the hooks used in the tripod floor stand, as it must support a heavy bending load. This hook it attached to a wood or metal base that is fixed to the wall with 2-4 (depending on the brand) wood screws. The last commonly found guitar stand is the A-frame guitar stand. This guitar stand is a folding floor stand in the shape of an A. It has sturdy rubber grips to prevent sliding on the ground. This stand is able to hold many different types of guitars with its uniquely bent velveteen rubber base holders. When designing something that is meant to be low in weight and cost and high in strength, it is important to look at the strength to weight ratio of materials, also known as specific strength. Generally, Ceramics, Composites, and certain Metals and alloys offer the best specific strength. Many of the ceramics with good specific strength are either too expensive or too brittle for the purposes of this project. Composites such as carbon-fiber reinforced polymer (CFRP) and glass-fiber reinforced polymer offer amazing specific strength and have a little more ductility in comparison to the ceramics. As far as metals go, high alloy steels, titanium, and aluminum are undoubtedly some of the best when it comes to specific strength. For the needs 5

6 of this project, the group will be taking a more in depth look at certain composite materials and alloys when designing the structural frame of the guitar display. It would be near impossible and very inefficient to design a display fixture that accommodated every known guitar model being sold today. It was discovered that the maximum weight guitar for the popular models was around 13 pounds. The group rounded this number up and decided to design for 15lbs before any safety factors. In order to design this product to get the most use, the needs of the display fixture must meet the requirements set forth by the most widely sold models in the US. Research shows that the two leading competitors in guitar sales are companies, Fender and Gibson. Based on sales, Fender sells more guitars every year than any other leading guitar manufacturer. The Stratocaster, Telecaster, Precision Bass, and Jazz Bass models make up most of these sales. Gibson s top selling models include the ES-175, ES-335, Flying V, Explorer, Firebird, SGs and Les Paul. Other brands, such as Schecter, Ibanez, Yamaha, and Jackson also make up a large percentage of guitar sales in the US. Many of these electric guitar models have the same features in terms of body thickness, average length, and width at the headstock. Designing the fixture to accommodate the majority of the guitar models being sold by this company, within reasonably similar dimensions, would yield the greatest benefit to the overall usefulness in the design of the product. Need: Upon examination of the current available options, one will find that there is a definite need for the proposed solution. The current models for guitar display all have inherent flaws in their design when put in certain indoor environments. Floor stand displays are good when there is a lot of indoor floor space in one s apartment. However, having a floor stand guitar display can prove to be very cumbersome in cramped settings such as small apartment bedrooms or college dormitories. Additionally, the floor stand is not a very safe way to display a guitar. The presence of small children or pets can prove to be very dangerous and unstable for the guitar, as well as the child or pet, when using a floor stand display. The other available option in stores is the wall mounted guitar display. The wall mount is very effective at eliminating the drawbacks introduced with the floor stand. When on the wall, the guitar is no longer in harm s way, nor taking up floor space. Unfortunately, the wall mount is considered to be a somewhat permanent fixture as it has to be mounted to an interior wall with 2-4 wood screws. Thoughtfully developing this proposed product would yield another option to musicians that are unsatisfied with the currently available products for guitar display. 6

7 Objective: The objectives for the Door-Mounted Guitar display fixture is to provide guitar playing musicians with a safe, cost-efficient, and effective alternative to display their instrument. This product is aimed to eliminate the flaws that have been examined in the currently available guitar displays such as taking up floor space, leaving the guitar open to dangerous environments, and causing damage to interior walls. The goal is to create an aesthetically pleasing product that meets the functional requirements of the project. Functional Requirements: - To be able to hold a guitar of up to 15 lbs. - To be able to be portable. - To accommodate most Fender, Gibson, Schecter, Ibanez, Yamaha, and Jackson electric guitars models (specific dimensions to be decided.) - Able to fit on door thicknesses ranging from To protect the guitar from any surface or structural damage that could occur from opening or closing of the door in which it is mounted to. - To not cause any surface damage to the door in which it is mounted to. - For the finished product to weigh less than 10 lbs. If all of these objectives are met at a low cost, and safely protects the guitar, the result of the project would be considered a success. Work Plan: A work plan timeline can be found in (Appendix 1) of this proposal. Extensive research regarding different sizes of electric guitars and different types of guitar stands/holders will be assessed. Additionally, research on shock absorption methods, in order to protect the door, guitar, adjacent wall, will need to be done. An all inclusive size for the guitar neck, length of the guitar, and thickness of the guitar needs to be chosen based on top selling guitar models. Once the group knows what they are designing for, they will begin to look at different ways to fix the guitar on a door. Design sketches of the system and its safety mechanisms will need to be thought of and held aside for later considerations in the design matrix. Thorough static and strength analysis will be conducted to insure the stability of each component and member in the fixture in order to support at least a 15 lb guitar. At this point, the group will begin to look at materials to incorporate in the design that can offer high strength at a low cost and weight. Once a few design concepts are deemed as viable, the group will begin to look more carefully at the design matrix and chose one or two high ranking designs 7

8 to put to the test in a SolidWorks FEA and Motion Study. Based on the results of the FEA, Motion Study, and design matrix, a final design will be chosen and fabricated in the projects lab for presentation. Qualifications: Experience in the following courses will enable the group to complete the project Statics Knowledge of statics will allow the group to calculate the forces created within the system when the weight of the guitar is introduced to the fixture. Strength of Materials Being able to determine the stresses in each member caused by the forces will allow proper material selection and proper size selection of the components that makeup the system. Mechanical CAD Applications SolidWorks FEA and motion study will be used before fabrication to ensure proper design and operation of the final design. Manufacturing Processes When the final design has been decided upon, being able to run the machinery in the projects lab during product fabrication with be very advantageous to the group. Dynamics + Machine Design Design knowledge of any moving parts, and considerations of multiple stresses within the system will help ensure an effective product design. Individual Group Member Qualifications can be found in (Appendix 2) Budget: The budget for the Door-Mounted Guitar Display Fixture is to be funded through the three group members Eric, Derek and Matt. The budget is going to aim for a minimum overall cost. Considerations of strength, weight, and cost will be taken into account to ensure the most effective product at a reasonable cost. As a good portion of the cost depends on the amount of material used in a design that is unknown as of now, the group is unable to come up with a certain number. However, it can be estimated that the overall cost of the project will be at a maximum of $150. This cost does not necessarily indicate the marketing price of the final product. The following was included in the budget - Impact Testing equipment - Material Costs - Shipping - Shop Overhead - Machining 8

9 The Project s Future: The future of this project could be a marketable product. The main focus of this project is to design a fixture that will secure and display electric guitars safely. Once this has been done successfully, the scope of the project could be improved further and be sold in music stores around the world. The design goals of this project were to design a Door-Mounted Guitar Display Fixture to accommodate most Fender, Gibson, Schecter, Ibanez, Yamaha, and Jackson electric guitars models. Further development of this model could lead to accommodating acoustic and specialty guitars. The design final design matrix for this project may exclude certain models based on production cost and machinability. It would be interesting to see if any of these designs would prove to be more valuable in the matrix is the product was to be mass manufactured on an assembly line, therefore reducing the significance of machinability and certain other factors. It is the group s hope that, in addition to creating a well designed product, that this idea be taken further to possibly provoke even more ideas for safely displaying musical instruments in an indoor environment. 9

10 Bibliography: "10 Best Guitar Brands." All News about Guitar. Revolution, 17 Apr Web. 10 June < "About Fender." Welcome to Fender.com. Fender Musical Instruments Corporation. Web. 10 June < "GFRP - Glass Fiber Reinforced Polymer. Lightweight, Durable Architectural Fiberglass." Custom Architectural Products in Cast Stone, GFRP, GFRC, GFRG and GFRS Stromberg Architectural Products. Stromberg Architectural. Web. 9 June < "Gibson USA." Gibson Guitar: Electric, Acoustic and Bass Guitars, Baldwin Pianos. Gibson USA. Web. 10 June < Mott, Robert L. Applied Strength of Materials. 5th Ed. New Jersey: Prentice Hall, Print. Mott, Robert L. Machine Elements in Mechanical Design. 4th ed. Upper Saddle River, N.J.: Pearson/Prentice Hall, Print. "Specific Stiffness - Specific Strength." Cambridge University Engineering Dept - Materials Group. Cambridge University. Web. 8 June < Tabellion, Jan. "Carbon Fibre Reinforced Plastic (CFRP) Ingenieurparadies." Welcome ww.ingenieurparadies.de. Schunk Group. Web. 9 June < 10

11 Appendix 1: Figure 1: Work plan/layout 11

12 Appendix 2: Matthew Bury 26 Longview Dr. Dartmouth, MA (508) EDUCATION Wentworth Institute of Technology, Boston, MA Bachelor of Science in Mechanical Engineering Technology August 2010 exp. COURSEWORK Statics Heat Transfer Computer Aided Manufacturing Strength of Materials Fluid Mechanics I & II Mechanical CAD Applications I &II Machine Design I & II Calculus I & II & III Manufacturing Processes TECHNICAL COMPETENCIES Engineering: [ProtoTrak] Machining, CNC lathe, Welding, Casting, CMM, Hard Gauging, Optical Comparators Design Software: Mechanical Graphics, AutoCAD, SolidWorks, Unigraphics, Benchman Software, EES Information Tech: Microsoft FrontPage, Word, Excel, and PowerPoint WORK EXPERIENCE Massachusetts Bay Transportation Authority October December 2009 Subway Operations Department Intern Drafted parts for the Type 7 and 8 subway trains such as sander tubes and brake calipers Participated in brake testing and maintenance procedures for the trains Performed measurements and inspected incoming parts Symmetry Medical, New Bedford, MA January May 2009 Quality Engineer Co-op Developed a Material Matrix based on raw material usage & industry standards for chemical and physical properties Performed part measurement and inspection Compiled data and performed statistical analysis on critical part feature to determine part verification to blueprint requirements Hawthorne Country Club, Dartmouth, MA June August 2009 Prep-Cook, Clubroom Cook and Dishwasher Prepared food for events such as weddings, banquets and bar mitzvahs Cooked food for members and golfers Cleaned dishes after events LAB EXPERIENCE Wood Block Design January May 2008 Programmed NC-Code on Benchman Software, then initiated it on the Techno-Isle gantry machine Redesign Air Engine September December 2007 Increased the net power output of the air engine to drive a particular conveyer system Collaborated with four classmates; particularly focused on the tolerance analysis and designing location of exhaust/intake holes Air Engine January May 2007 Machined a one cylinder piston air engine and casted the base from aluminum alloys 12

13 Derek J. Iredale 22 Sunset Terrace Merrimac MA, (978) Education Wentworth Institute of Technology Boston, MA Bachelor of Science in Mechanical Engineering Technology August 2010 exp. GPA: 3.55/4.00 Dean s List Fall 2005-Spring 2008 Coursework Strength of Materials Thermodynamics I & II Dynamics Materials Science Cad Applications Fluid Mechanics Mechanical Design Intro to HVAC Manufacturing Processes Business Ethics Tech. Communications Electricity and Electronics Lab Experience Intro to HVAC Studied heating and humidification processes in an air conditioning demonstrator to detect sensible and latent heat changes and the affect on the output air. Calculated heating loads for sample buildings by quantifying heat loss through convection, conduction, and infiltration. Thermodynamics Analyzed heat transfer in various systems by collecting data and balancing energy equations to determine system efficiency and entropy gain. Determined the performance of a diesel charged engine by evaluating the unit output, thermal efficiency, fuel consumption, and cost of operation for power production. Technical Competencies Software- SolidWorks, AutoCAD, Microsoft Office (Word, Excel, and PowerPoint), and some experience with LabVIEW. Machining- Engine lathe, Vertical mill, Drill press, and Band saw. Experience Nuvera Fuel Cells. Billerica, MA 1/09-5/09: Research & Design Lab Intern. Maintained the stack durability testing lab by monitoring voltage changes and ensuring proper test stand performance. Disassembled hydrogen fuel cell packages at end of life and prepared data for failure analysis reports. Sullivan, Bazinet, and Bongio Inc. Ipswich, MA 05/07-09/07: Certification Trainee Maintained clean room environments using particle counters and adjusting airflows for Biogen Idec in Cambridge, MA. Helped install HVAC systems for companies such as Luminus in Billerica, MA, and Bio- Concept in Derry, NH. 13

Door Mounted Guitar Display Fixture

Door Mounted Guitar Display Fixture Transmittal Letter MECH 690 Senior Design Summer 2010 Mr. Peter Rourke Mr. Richard Roberts Associate Professor Department of Electronics and Mechanical Wentworth Institute