Our model HSA hydrostatic bearing is interchangeable with other free-standing type guide bearings and has an 18,000 lb dynamic load capacity and an 8,000 lb static load capacity. It requires a 2500 PSI hydraulic power supply. It can be made to order with up to a 2-3/8″ maximum stroke.
Model HVGS-60 Dual Shaker Horizontal & Vertical Guided Table System
This system features both a vertical guided head expander and an isolated platform and slip table. It utilizes two independent electrodynamic shakers which can be configured for either dual in-axis vibration or independent dual-axis vibration.
Model VTLS-120 Vertical Guided Head Expander
For extreme overturning moment restraint we offer our VTLS system. Capable of restraining over 3 million in-lbs of overturning force at up to 3-1/4″ of stroke.
Manufactured from solid magnesium billet stock. Larger Cubes, 12.0″ and up, are constructed from welded magnesium tooling plate, internally gussetted to minimize the overall weight and maintain strength and stiffness.
Baughn Engineering’s model MST MonoBase, with its dual I-Beam style steel construction, provides maximum stiffness between the shaker and the horizontal slip table for improved controllability and dynamic response during high frequency and/or high acceleration testing.
The MonoBase System incorporates our standard oil film table technology to provide a highly damped, horizontal slip surface. The basic system includes an in-line drive magnesium slip plate with perimeter extensions that cover the oil recovery moat. This design protects the operator from exposure to the hydraulic oil while keeping fingers and clothing from accidental contact with moving components.
The in-line slip plate design attaches to the horizontal row of inserts on the shaker armature. Our optional welded ‘Bullnoses’ or removable Drive Adapters are available for interfacing of the slip plate to the entire shaker armature face.
Special attention is given to operator safety including non-skid surfaces, plastic edge molding, heavily chamfered or radiused edges, and a UL approved pumping system.
The low-cost MonoBase System comes complete with a precision ground natural granite slip surface, extra large internal oil reservoir, adjustable trunnion mounting blocks, and an oversized magnesium slip plate. Also included is perimeter oil filtration, neoprene ‘waffle pad’ isolation (optional low frequency isolators available), swivel lifting rings, built-in oil pump system, and multi-coat polyurethane finish for maximum corrosion protection.
Model STC – MiniBase
The model STC MiniBase system offers the same basic features of the MonoBase System, but is designed to mount the entire shaker assembly, including the shaker’s standard support base, directly to a common steel and concrete platform. The common platform also supports one of our standard Stand Alone Slip Table Assemblies. The MiniBase allows our customers to incorporate their existing shakers ‘in-house’ using an overhead hoist and simple hand tools. Each MiniBase is specifically designed to match our customer’s individual shaker model for easy installation.
Model ST – Stand Alone Slip Tables
The Model ST Stand Alone Slip Table Assembly was designed with simplicity in mind to provide years of trouble-free operation. Only the highest quality materials and components are used to produce our standard slip table models, including; precision ground, natural granite slip surfaces; low volume, continual operation oil pumping systems; AZ31B magnesium alloy slip plates; 100% welded steel base construction; and high gloss polyurethane finishes.
Construction of the slip table includes a steel outer housing filled with steel reinforced concrete. Heavy duty, swivel lifting rings are included for easy moving.
The ST Slip Tables include four each leveling jackscrews for easy alignment to existing shakers. Tie-down mounting locations are also provided for permanent attachment to the lab floor or optional isolated base.
Our standard slip tables are also available in custom sizes to meet our customer’s specific test requirements. Optional internal self-lubricating linear guide bearings or hydrostatic bearing guidance is available for restraint of large load applications.
Model IP – Isolated Platforms
The steel and concrete filled Isolated Platform used in our MiniBase Slip Table Systems is available as a separate product to support existing shakers and/or auxiliary test equipment. The standard platform provides simple isolation from the laboratory floor down to 10 Hz. Low frequency isolators that provide isolation down to 3.5 Hz, is also available.
Our standard Isolated Platforms have a heavy steel top plate and include tapped holes per the customer’s requirements for attachment of shakers and/or equipment. Swivel lifting rings are also included for handling.
All Isolated Platforms and Table Systems offer the following optional features: air flotation for easy moving, power tow units for the added safety of controlled maneuverability (typically used in conjunction with air flotation), casters and rails for chamber installation. Of course all tables and bases are available with special features to meet our customer’s specific requirements.
Model DA – Drive Adapters
Our standard magnesium Drive Adapters attach to the entire shaker armature pattern (some exceptions apply) for maximum transmissibility between the shaker armature and the slip plate.
Interfacing to the slip plate is accomplished using standard socket head cap screws installed at an easily accessible 20° angle. No special, high cost, expansion pins or other devices are required. The stepped interface between the slip plate and the Drive Adapter provides the appropriate pre-load for 100% energy transmission from the shaker.
Baughn Engineering “Universal Multi-Line System” is truly one of the most unique and revolutionary multiple axes test systems on the market to date. Many multiple axes systems have been developed in past years, but most have utilized some form of mechanical linkage arms, spherical bearings and other types of linkage devices to allow for the simultaneous three axes movement of the system.
Baughn Engineering’s “Universal Multi-Line System” does not utilize the past design methods and therefore eliminates the foreshortening hang-ups and dynamic glitches experienced with previous design approaches to multiple axes vibration testing. In addition to this, the “Universal Multi-Line System” protects the shaker armatures from cross-axes forces.
The development of the Universal Multi-Line Vibration Test System was part of Baughn Engineering’s continuous effort to provide the test industry with innovative and unique designs.
Baughn Engineering’s “Universal Multi-Line System” is the only system to date that has solved the limitations of the past systems. The “Universal Multi-Line System” permits the test industry to examine the dynamic response of test components vibrating in three simultaneous axes out to 2,000 Hz at the full capacity of three shaker systems.
The Universal Multi-Line System has the following features:
Multiple axes testing
Simultaneous 3 axes linear vibration
Utilizes existing shaker and control systems
Capable of working with all shaker types
Capable of working with isolated shaker trunnions
Capable of performing out to 2,000 Hz
Capable of typical 2″ stroke (optional long stroke available)
4′ x 4′ working area (optional sizes available)
Eliminates side loading on the shaker armature assembly
When testing components in the vertical test axis it is important to be aware of the cross-axis restraint capabilities and load support capacities of your shaker’s internal and external guidance and load support systems. Exceeding the capacity of these guidance and load support systems can cause serious damage to your shaker and to your test specimen.
Baughn Engineering has developed several types of guidance systems which can be used in conjunction with our standard magnesium head expanders or vertical test fixtures. Standard designs are also available to provide guidance for our customer’s existing head expanders and vertical test fixtures.
VERTICAL GUIDED HEAD EXPANDER SYSTEMS
Baughn Engineering offers a complete line of vertically guided head expander systems. There are 4 basic guidance systems available, depending upon the cross-axis load or moment restraint requirements need to meet our customer’s test specifications. These guidance systems provide additional cross-axis restraint to protect the shaker’s armature and internal guidance components. All guidance systems are available with integral airbag load support for testing large test articles that exceed the shaker’s load carrying capabilities.
HYDROSTATIC PAD BEARING GUIDANCE:
Our original, uniquely designed, hydrostatic pad bearing guidance system, in combination with the shaker’s internal guidance system, restrains large side moment loads using high-pressure hydrostatic pad bearings. The one-piece welded steel frame design provides the necessary strength and stiffness required for high load applications while maintaining a compact overall size.
The frame, bearing, and head expander assembly can be sealed for cleanroom applications, as shown on page 5 of our catalog.
An optional airbag load support system is available to re-center the shaker’s armature when large, heavy test articles are mounted to the head expander. Stroke limitation and special lockout devices are incorporated into the system to prevent overloading of the shaker. A secondary airbag load support system is available for those shakers with isolated trunnions.
HYDROSTATIC JOURNAL BEARING GUIDANCE:
The “Verti-Line” Guidance System provides maximum moment restraint for large shaker systems with up to 3.0″ stroke capacities. The system, developed by Baughn Engineering, utilizes two large capacity hydrostatic journal bearings positioned directly above the shaker armature. The magnesium head expander surrounds the bearings for maximum stiffness and dynamic response. The head expanders and guidance system can be easily removed to allow for horizontal testing.
FLEXURE GUIDANCE:
Provides basic guidance for off-center loads using laminated and wrapped leaf flexure assemblies. These systems generally use four sets of two each flexures mounted at 90 degrees to one another. The flexures are supported by a steel frame structure which attaches directly to the lab floor or to the shaker body. An integrated airbag load support system is available.
NON-LUBRICATED BEARING GUIDANCE:
Provides basic guidance using a compact space saving design. These bearings function without lubrication and provide a clean, simple method of guidance. They are ideally suited for cleanroom and ‘squeek and rattle’ testing. An integrated airbag load support system is available.
MODEL MPF SERIES – “STACKER” MODULAR CIRCUIT BOARD FIXTURES
Pat. No. 4,912,980
The patented ‘Stacker’ Circuit Board Fixture provides the electronics industry a unique way to test virtually any circuit board. The MPF series fixture is a totally mechanical system that eliminates the added costs of maintenance associated with hydraulic or pneumatic systems. Unlike a hydraulically operated fixture, the Stacker allows total custom tailoring in the test lab to adjust to varying sized and quantities of circuit boards.
Each mounting layer has a ½ grid of ¼-20 threaded holes for mounting of Delrin (included) or Aluminum clamping strips. The clamping strips fit virtually any circuit board. For applications where clamping of the circuit boards is not allowed, special circuit board interface hardware is available.
Since all Stacker components are interchangeable, each fixture assembly can expand to fit all future testing and budget needs. The modular design permits the flow of individual components to various test stations to meet varying production requirements. The individual mounting layers can be used for handling, storage, and transporting of the circuit boards to various test stations without the additional contact with the test items.
The assembly of seven or more mounting layers forms a “cube” which can be rotated to achieve three mutually perpendicular test axes. Cable access is provided for each mounting layer as well as finger slots for lifting and handling. Optional spacer layers are available, which provide an additional 1.50″ of clearance between the layers for circuit boards with large IC components. The spacer layers also incorporate large holes around the perimeter to provide air circulation in thermal environments.
Also available is a specially designed “Stacker Head Expander” (HE/MPF) to interface the Stacker to small shaker armatures. The HE/MPF incorporates perimeter clamping bars and heavy duty threaded inserts to allow testing of larger components using straps and clamping bars. The same tapped grid pattern that exists on each Stacker mounting layer, also exists on the top surface of the HE/MPF. Typically test applications have included shipping containers and lightweight electronic components.
MODEL MSF SERIES – “MINI STACKER” TEST FIXTURES
The Mini-Stacker Test Fixture is a universal fixture designed to hold multiple IC’s or other small components in a layered format similar to our larger MPF Stacker Fixture. The multiple test items are ‘sandwiched’ between pocketed layers of frangible foam material. The foam layers replace the traditional beeswax to hold tiny components, therby eliminating contamination.
The Mini-Stacker, when all layers are assembled, forms a cube that can be rotated to any 90° angle to achieve 3 axes of vibration or 6 axes of shock testing without further contact with the test components. Access is provided to the foam cavities for accelerometer or electrical connector cables.
The Mini-Stacker is supplied complete with an adapter plate that mounts directly to a shaker armature or to a horizontal slip plate. Foam inserts and all necessary hardware for assembly is provided with the Mini-Stacker.
MODEL LF & TF – “L” & “T” FIXTURES
Multi-axis vibration testing can be accomplished in several ways. One of the least expensive methods is through the use of ‘L’ and ‘T’ Fixtures. These fixtures provide at least one vertical mounting surface to allow two axes of vibration by rotation of the test article.
Our ‘L’ Fixture provides a single vertical mounting surface for most test applications, while our ‘T’ Fixtures are designed with two vertical mounting surfaces. The ‘L’ Fixture can also be designed without gussets beyond the mounting surface, providing total access for easy mounting of components and clearance for cables, ducts, and connectors.
The ‘L’ and ‘T’ Fixtures often eliminate the need for more costly horizontal slip tables and hydrostatic bearings systems since multiple test axes can be achieved on the shaker in the fixed vertical position.
Baughn Engineering’s ‘L’ and ‘T’ Fixtures are manufactured from AZ31B magnesium tooling plate for maximum stiffness and minimum weight. All mounting or attachment holes include either heavy-duty stainless steel threaded inserts or B.E.’s standard permanently installed heavy-duty stainless steel washers for additional strength and durability.
Our standard ‘L’ and ‘T’ Fixtures are available in many standard sizes ranging from a 4.00″ square working surface to a 24.0″ square working surface. Custom sizes and shapes are also available.
Our larger ‘L’ Fixtures utilize our exclusive ‘truncated box’ design, which was originally created for our standard Head Expanders. The ‘truncated box’ design encloses all open cavities of the fixture for maximum stiffness and uniform energy transmission to the mounting surface. This procedure results in superior shaker efficiency and performance.
MODEL IF – I-FIXTURES
Our standard I-Fixture provides a lightweight alternative to the standard magnesium Cube Fixture. The I-Fixture permits simultaneous X, Y, and Z axes of test on a single vibration fixture while attached to the shaker in the vertical orientation. The I-Fixture provides the benefits of lightweight magnesium with its natural high damping characteristics, combined with the rigidity and strength of a solid one-piece weldment.
Three separate precision-machined mounting surfaces permit simultaneous testing of components, each in a different test axis. Heavy duty, stainless steel hardware, including permanently installed B.E. washers, provide added strength and durability to the I-Fixture.
Vibration Fixtures
We utilize many techniques to improve overall fixture performance. For high frequency testing we often incorporate our “Q-Damp” damping material into the finished fixture for improved controllability and reduced vibration amplification levels during resonant conditions. We also use various interface materials, such as, anodized aluminum, stainless steel, and resin based materials, to either improve wear characteristics or protect the test article’s critical contact surfaces during product installation and testing.
Operator safety is a major concern when designing our fixtures. All sharp edges and surface imperfections that could cause injury to the technician while handling the fixture are removed during the finishing operation.
Heavy fixtures include provisions for eyebolts or lifting rings, allowing the handler to use cranes or overhead hoists. All fixtures are stamped with reference numbers, dates, and actual weights to simplify storage and retrieval, and to calculate proper loading of test equipment.
Most of our fixtures and support equipment products include surface treatments such as polyurethane coatings, anodizing, and chemical treatments to protect surfaces from corrosion and to maintain the product’s integrity. All mounting holes in our magnesium products are permanently lined with our standard heavy duty, stainless steel washers or solid body threaded inserts for greater strength and extended durability.
Each order is assigned a permanent project engineer who interfaces directly with our customer to guarantee a common understanding of the test requirements and to assure proper interfacing with the existing test equipment.
HEAD PLATES
The simplest text fixture, our standard magnesium Head Plate, provides a universal mounting surface for test items. When used in conjunction with a horizontal slip table the Head Plate can provide 3 axes of vibration, without adding additional specimen mounting inserts to the horizontal slip plate.
Custom insert patterns and special machining is available to meet our customer’s unique testing requirements.
MAGNESIUM HEAD EXPANDERS
Our most popular test fixture, the standard magnesium Head Expander, provides a horizontal mounting surface that increases the shaker’s available surface area to allow testing of large test articles or multiple items. The original “truncated box” design of our standard Head Expander represents years of evolution in head expander design. This design encloses all open cavities of the Head Expander between its base and top mounting plate. This arrangement provides direct energy transmission between the shaker and the perimeter of the top mounting surface. The truncated box design also provides added strength and rigidity, while allowing the use of thinner, lighter weight internal gussets.
Baughn Engineering’s “Q-Damp” damping process is incorporated into all our standard magnesium Head Expanders, except low frequency designs, to provide improved dynamic response characteristics during high frequency testing. This process guarantees controllability of all of our standard high frequency Head Expanders, up to 2000 Hz.
Head Expanders are available in our standard shapes; round, square, and octagonal, as well as special shapes such are rectangular or triangular.
We also offer optional features, including removable extensions that provide a temporary increase in the top mounting surface to mount the occasional test specimen that requires a larger mounting surface area. Also available are thermal barriers, raised mounting inserts, special machining, custom finishes, and multiple shaker armature mounting patterns.
Our standard Head Expanders are available in all sizes up to 60.0″. Special larger sizes are also available. Our custom designs have included: dual shaker designs, square mounting surfaces up to 108″ across the flats, combination vertically/horizontally guided systems, and many others.
