Harvan Manufacturing is a family owned and operated company that has served industry with high-quality components for over 25 years. We offer a broad range of manufacturing services, including custom precision machining, welding and fabrication, and laser and waterjet cutting, to customers in the agriculture, forestry, military and defense, off-road vehicle and heavy trucking, and valve and control industries. Our expert team—including certified machinists and welders, experienced engineers and technologists, and administrators—leverage their combined knowledge and skills to meet all of the product and production needs of our customers, including for custom machined torsion bars.
What Are Torsion Bars?
A torsion bar is a type of torsion spring—i.e., a flexible spring designed to resist the torque generated when it is twisted. They are generally employed for load-bearing applications that require a flexible component rather than a rigid component that could potentially fail and cause damage, such as in the suspension of vehicles, production machinery, and other precision mechanisms.
When employing a torsion bar in their mechanical system, industry professionals fix one end of the component to another stationary component (e.g., a frame). This configuration prevents the torsion bar from moving completely, allowing it to build up torque as it is twisted along its axis. Once the force is halted and removed, the torsion bar quickly returns to its starting position.
Torsion Bars vs. Coil Springs vs. Leaf Springs
In the automotive industry, industry professionals employ a variety of different springs. In addition to torsion bars (torsion springs), some of the most commonly used include coil springs and leaf springs. Torsion bars different from coil springs and leaf springs in that they do not flatten out (leaf spring) or compress (coil spring). Instead, they twist along their length—causing tension—when force is applied. Once the force is removed, they untwist and return to their original shape.
Compared to coil springs and leaf springs, torsion bars offer unique advantages. For example:
They are highly adjustable, enabling the ride height of a vehicle to be changed. This capacity allows the spring to be adjusted as it wears to maintain the proper ride height and the owner of the car or truck to fit the vehicle to their preferred ride height.
They have a small footprint, making them ideal for applications where space is limited.
One of the most well-known applications of torsion bars is in vehicle suspensions where they absorb shock to provide a smooth, comfortable ride. Many vehicles use them as the primary weight-bearing spring, connecting the body of the vehicle with the wheel axle.
We specialize in heavy-duty torsion bars and stabilizer bars for the defense industry. These items have to go through rigorous testing and be capable or supporting the great weight of armored vehicles.
Custom Machined Torsion Bars From Harvan Manufacturing
Industry professionals typically make torsion bars from forged and heat-treated specialty alloys. They employ a variety of manufacturing techniques to produce components that offer the proper flexibility when torque is applied.
At Harvan Manufacturing, we employ state-of-the-art computer numerical control (CNC) equipment and precision machining processes to produce high-quality torsion bars for our customers. We also have contacts in the industry who specialize in forging, heat treating, peening and testing torsion bars. Our machining capabilities include:
2-, 4-, 5-, and 9-axis turning
Centerless, cylindrical, and surface grinding
Multi-axis horizontal and vertical milling
Secondary services, such as broaching, burnishing, and lapping
With these capabilities, we accommodate a broad selection of materials—including common and exotic metals, precious metals, and food-grade plastics—to meet the needs of our customers.
For over 25 years, we have been manufacturing the highest quality components for our customers. Our team is made up of expert machinists, engineers, administrators, welders, and technologists who will work with you to ensure you’re satisfied with our products. We provide a wide variety of value added machining services, and our CNC equipment allows us to create parts with incredibly tight tolerances. Additionally, we provide secondary machining services for every stage of your project including broaching, lapping, and more.
What Are Some of Our Secondary Machining Services Available?
Broaching is a process through which a cutting tool, or broach, is pushed and pulled through the workpiece. This process can be used for complex and intricate profiles, as well as workpieces that are circular and flat. The broach itself is made up of a series of tools placed along a tool body in the axial direction, with each tooth varying in size to allow for greater precision in the process.
This polishing process creates perfectly flat, polished parts. It functions by rubbing an abrasive between two surfaces, and can be used on a variety of materials, such as metal, ceramic, and glass. While it is often used to create a flat surface, lapping can also create domed surfaces with a great deal of precision.
Burnishing is a finishing process in which a hard roller is rolled across a metal surface. This process completely smooths the surface of the workpiece, eliminating peaks and valleys and resulting in a mirror-like finish. Parts that have been burnished tend to be more durable and wear-resistant. They are also less prone to corrosion due to their lack of cracks.
This grinding method is unique in that the workpiece is supported by a workblade rather than mechanically constrained. It is then ground with a grinding wheel and a regulating wheel. The goal of this process is to create a perfectly round workpiece, with a smooth surface finish and tight tolerances. Experts using this technique can finish workpieces with incredible precision.
Cylindrical grinding is a specialized technique designed for cylindrical or rod-shaped workpieces. The workpiece is set up to rotate in one direction while the grinding wheel rotates the opposite way. The wheel and table may move up and down or side to side. Cylindrical grinders can be controlled by a computer, providing a highly precise final finish.
This technique uses a grinding wheel to remove material from the surface of a workpiece. There are a variety of different methods of surface grinding, including vertical swivel head grinding and horizontal spindle single disk grinding. This method is utilized to produce flat surfaces, sharpen cutting tools, and provide specific thickness tolerances or surface finishes. It can also be used to remove material from hard surfaces.
Milling is a process through which a high speed rotating cutter chips unwanted material away from a workpiece. It’s ideal for asymmetric workpieces that may have complicated features such as pockets, holes, and complex three dimensional contouring. Milling is highly precise and is often used to add details to workpieces that have already been shaped using other methods.
Similar to milling, turning is a material removal process that is often used to refine features on complex workpieces. The cutting tool used in this process is generally a single-point tool, although multi-point tools may be used as well.
In addition to our array of secondary machining services, we also offer a variety of finishing and assembly services to create the perfect final product.
Contact Us for More Information
At Harvan, we provide quality techniques and expertise during every step of the manufacturing process. To learn more about broaching, lapping, and all the secondary machining services we offer, contact us today!
What many people don’t realize is that welding can be far more complicated than it looks from the outside. What material are you using? What are the physical properties of that material? What’s the application for the finished component? These are just some of the factors that can affect how the welding project needs to get done, and what kind of welding process a manufacturer will have to use.
Some welding processes work better with different materials
The properties of the material are one of the most important things to take into account before starting the jobs. As you’ll see later on, some welding processes work better with different materials. Different materials are better suited to different industries and applications, and the choice of material can affect the welding process. For example, one material that we work with, aluminum, is perfect for industries where a manufacturer may want to reduce weight.
Gas Metal Arc Welding & Gas Tungsten Arc Welding
One type of welding we do is called gas metal arc welding. It’s an ideal process to use when you’re working with materials like aluminum, carbon steel, and stainless steel. It’s also important to mention that this particular welding process is generally faster than some other processes. Another welding process is known as gas tungsten arc welding, which can be used with all of the materials that we work with, from aluminum to stainless steel and carbon steel. One notable thing about this welding technique is that it’s known for its finer technique and slower process.
Our extensive experience in this field ensures that we choose the best, most efficient technique every time. That’s why we can confidently say that we’re your one stop shop for any manual or robotic welding needs.
At Harvan Manufacturing, we offer both laser cutting and waterjet cutting services. You may be wondering, just what are the differences between the two? While both methods can be used for applications in a wide range of industries, like aerospace, transportation, and energy, they differ in a few key ways.
The Difference Between Laser Cutting Materials and Waterjet Cutting Materials
Waterjet cutting is the use of a high pressure stream of water and sand, and, while the procedure may be slower than laser cutting, it’s more suited for cutting thicker material. Additionally, it can handle some applications that laser cutting cannot.
Our laser cutting machines are used only for metal materials, with the exception of aluminum—which can be more difficult to cut on a laser. We use waterjet cutting for aluminum and non-metallic materials, like plastics, wood, and even stone.
While new advancements in laser cutting technology have increased the power of the equipment and have allowed lasers to make deeper cuts in thick materials like steel, waterjets are still the ideal way to cut through much thicker materials.
Choose Harvan Manufacturing for Industrial Cutting Services
We recommend using laser cutting because it’s a bit faster, but you can see that the material used, plus the thickness of said materials are the main considerations when deciding between the two. No matter the method, we pride ourselves on the ability to deliver high-quality components on time, whether it’s just a prototype or a small to mid-sized order of parts.
We’ve thoroughly demonstrated our capability to take an idea and make it a reality in a quick and efficient manner in a previous blog, therefore, it should come as no surprise that we are highly skilled at every level. In order to better understand what we do at each production step, continue reading about our manufacturing process!
A Complete Breakdown of the Harvan Manufacturing Process
Stage 1: Prototyping
At times as a first step, we get requests from clients for prototyping work. With our in-house 3D printer, we take the design and print it out for the customer – according to their drawing and specifications. Then the customer can take the printed prototype and “interference fit” it into the assembly, to make sure it performs the job that they want it to do.
Harvan will sometimes find issues with the drawings that make it difficult to manufacture (adding to the cost), so Harvan engineers will make suggestions for modifications to the drawing/part in order for it to work from a manufacturing aspect.
Suggestions to remove details that add costs without changing the part’s function can be a part of the first step of prototyping.
Stage 2: Manufacturing Quote
The engineers then prepare a quote. They go out to source the material and then find good pricing for the material and incorporate that into their quote. Of course, the time to manufacture the part is factored into the final quote on the product.
Harvan will develop a “Bill of Operations” which is a detailed listing of what steps that it takes to make a part. Harvan uses Activity-Based Costing – each activity will have a particular cost associated with it based on the expense of the equipment used and the skill of the employee using that equipment.
Stage 3: Manufacturing the Part
Once the order is received, the quoted method of manufacturing is once again reviewed by Harvan’s engineering staff to ensure that all the materials being used are the proper ones based on the TDP. In addition, the manufacturing process is also reviewed to make certain it is correct before going to production. This is a second line of quality control put in place in order to make sure all the specs are adhered to before the work order goes forward into production.
After engineering has a look, the engineers will qualify any welding to the standards recommended by either the Canadian Welding Board (CWB) or the American Welding Society (AWS).
Stage 4: Quality Control Checks
First-off Inspection – we run off one piece, and the machine operator will have someone other than the operator review to make certain it is correct. Afterward they do a 10% Inspection – so that every 10th part is inspected to make certain that the tolerance remains in place or if the machines need to be readjusted to meet the drawing. Finally, before the part is shipped to the customer, there is a Final Inspection to make certain the part meets the client’s full requirements.
Whatever your application or part may be, we want you to be assured that our engineering staff will piece together the perfect parts from beginning to end. We leave no step behind!
In today’s hectic business and manufacturing world, there isn’t any time to waste. Being the best is not enough anymore; you must also be the fastest and most cost-effective. At Harvan Manufacturing, we know a thing or two about being the best, being timely, and getting the job done for the right price from idea to completion. However, it is important to understand that the process that one must go through to bring a product from idea to creation to delivery can be tricky.
We take care of any and all obstacles for our clients.
To start, there is getting all the right forms filled out, quotes delivered, and materials picked out. With the expertise of our team, we know what can go wrong, such as hard-to-reach subcontractors, and we take care of any and all obstacles for our clients. It is important to know that Harvan handles massive projects from the world’s biggest military contractors, so putting together even the most complex quote is part of our daily routine.
Once we get you all settled in, the prototype stage comes next. Our Spectrum Z510 3D printer is perfect for creating quick and accurate prototypes. We know the prototype stage is a great opportunity to work closely with our customers to make sure all of their needs and demands are met. It gives you the chance to put your prototype through its paces. Many of our larger government customers have to go through tens, if not hundreds, of different tests in conjunction with an often-exhausting approval process. Harvan is there to make sure nothing enters the manufacturing stage unless it is perfect. This attention to detail saves our client’s both time and money wasted on mid-production changes.
Harvan is there to make sure nothing enters the manufacturing stage unless it is perfect.
After everything is in place, Harvan offers finishing (including in-house lapping, burnishing and grinding) and assembly capabilities for the final touches. Our production facilities can handle everything from 1 to 10,000 products a year and when combined with our highly skilled workforce, you know the job will be done right, on-time, and on-budget.
No matter the industry you excel in, be it defense, agriculture, or industrial valves and controls, if you need to take a product quickly, efficiently, and cost-effectively from idea to completion, you know you can count on the Harvan team.
As providers of customized manufacturing solutions, we at Harvan Engineering are heavily involved in all aspects of our clients’ projects, and we are constantly working very closely with them from start to finish. In that aspect, we can be considered a one-stop-shop.
This means that sometimes we are asked to prototype parts, and sometimes we are prototyping without actually being aware of it. How so? A client might bring us a drawing and ask us to fix any problems and make it work, and we create a solution and are the first to actually make the part. In basic terms, this is prototyping, but for us, it’s just what we do to ensure our clients’ needs are fully met.
Oftentimes when we receive drawings, we see mistakes in the design—perhaps the tolerances don’t meet the overall dimension, or several design details mean something isn’t actually feasible. Perhaps with the tooling that is commonly available, something can’t be made as specified, or the material selection won’t work for how the part is made. Sometimes the standards don’t make sense; there can be different standards for the bar, sheet, and rod, and these details must be correct for drawing clarity.
Our job is to make the part manufacturable and to do so in a way that meets all of our customer’s needs and specifications. We draw upon over 25 years of experience and expertise in materials and manufacturing, so we can look at a drawing and help contribute to the design, giving solid solutions. We know that what is on paper has to be able to be manufactured, and that you can’t leave things open to interpretation. The TDP (total drawing package) needs to explain how a part is made.
Through our help in this process, we can save both time and money, ensuring no mistakes are made and that everything is easily achievable. Different departments within our company all have a role in reviewing the drawings and making sure everything makes sense, providing a complete, hands-on solution backed by true expertise.
We know that at the end of the day, time is precious and your product’s design must be flawless. Our experience and commitment ensures both your time and design’s integrity will be saved.
Having a view of our world that includes being a sustainable member of the business community has increased over the past few years. Throughout the manufacturing and engineering fields, companies are working to make contributions toward a cleaner environment and a sustainable future. Everything from new approaches to manufacturing that reduce demand for resources that are scarce to the development of alternative energy sources like solar and wind are being tested and used by companies small and large.
We’ve seen companies use new advances in technology to use energy in a smart manner via automation systems. Engineers are constantly re-engineering systems and equipment in order to eliminate wasted materials, energy consumption, and even motion.
Here are a few of the things that we at Harvan Engineering have taken on over the past few years to become a more sustainable operation:
Recycle all of our scraps.
Recycling initiatives throughout our operations.
Reduce amount of paper that we use.
We have been working to ensure that any chemicals we use in processes are as environmentally safe as is available on the market.
We continually work to remove processes if they are unhealthy to our employees, our neighbors and to the environment in general.
Our lighting has been upgraded in the shop to save energy.
We have instituted an Environmental Policy, as part of our Health and Safety Management System, in order to have guiding principles to work from each day.
We are committed to becoming more sustainable for our employees, our community, and especially for our customers. We believe that we can develop and build products that are as good if not better via sustainable methodologies and practices. We look forward to progressing forward down this path in the New Year. Happy 2014!
Automation is utilized in many processes of today’s manufacturing sector. Many factories that are creating components and parts for a variety of industries have some type of the process automated. Robots are often used in more hazardous applications or in extremely repetitive actions that can be ergonomically problematic for human workers.
What are the advantages of automation and what are some of the disadvantages? Below is a list of advantages, with more information in this article, with some caveats to why each may be also a disadvantage if viewed from a larger perspective.
1. Decreased Overhead Costs – When a manufacturing company adds some element of automation into its production or fabrication of products, the competitive advantage is increased for the company. Through automation, the company will be able to reduce costs through elimination of staff and an increase in productivity (many robots can run 24/7). However, it is important to note that many automated systems and equipment are expensive, so these additional costs will have to be compared to the overall reduction of cost in the long run.
2. Increased Productivity – As mentioned above, many automated systems can work long hours, into the night and on weekends, which provides an overall increase in productivity. This increase in productivity, although beneficial, may be slowed by other non-automated factors, such as product finishing, final packaging, and shipping. A cost comparison of skilled workers versus an automated system with all the factors from start to finish is the best analysis to determine if increased productivity can offset any human staff-related costs.
3. Consistency, Reliability, and Accuracy – Automated equipment and robotics can manufacture and continually repeat consistent final product results. The addition of automation eliminates the common issue of human error that may detract from the overall quality of production. Manufacturing processes can be carefully regulated and manipulated in order to maintain overall quality. This is a key advantage of automated equipment—the human error element is greatly reduced providing assurance that parts and components will be of consistent high quality.
4. High Volume Production – Automation is a valuable resource when a manufacturer is producing high volumes of components or parts. However, it isn’t very useful for lower volume production, as the expense for tooling and operating the machines can often outweigh the overall cost of the finished product.
5. Increase in Safety – The use of robotics and automated equipment is an effective way to prevent worker injuries. Many of today’s automated production devices keep workers a safe distance from the more hazardous areas of work. Human staff is still needed to operate and program the equipment, but the actual hands-on work is left to the machine, protecting the health and safety of staff. In addition, robots are able to work in extreme environments such as very hot or cold areas of a manufacturing plant. This allows workers to be free of additional harm from elements harmful to humans.
Today’s manufacturing incorporates the skills of trained workers with the precision of automated equipment and robotics. This combination of automation and a skilled work force provides a strong operational base for North American companies to be competitive both here and overseas. What do you think? Is automation providing advantages for manufacturing or are there long-term potential disadvantages? Let us know!
In less than a decade, North America has under gone a massive economic transformation thanks to the boom in the natural gas and oil industries. A recent report from the influential global information company IHS gives some insight into just how big the changes have been in the past six years. According to the IHS, this seismic shift in the global energy landscape gets credit for adding an average of $1,200 of discretionary income to the U.S. families, along with supporting upwards of 1.2 million jobs and contributing $284 billion to the GDP. In Canada, the oil and gas industry currently supports 550,000 jobs across the country and should create close to another 1 million jobs by 2035, according to this article.
With all of this oil close to home, what is the best way to distribute it across North America? Does it make more sense for the oil to be refined more locally and then distributed at that point? For years, North America’s relatively moribund domestic energy industry had little need for new infrastructure. However, that has all changed, and it has changed in a blink of an eye. Energy giant Exxon believes that North America will be exporting 15% of its natural gas and 5% of its oil by 2040. The two main forms of transporting oil and gas from the field to North America’s ports and transportation hubs are through pipelines and via rail or truck. Both forms of product movement have their benefits and their limitations.
Rail and Road
The first thing to point out is that there is already a vast network of rails and road throughout North America. Everyday 42% of our ton/miles of U.S. freight travels by rail, as seen in this article, while trucking freight saw a 3.9% jump in 2012 alone. As far as safety, while train accidents have declined 26% since 2000, they still occur. As we witnessed with Canada’s recent July train disaster, they can create high levels of doubt in the communities that they run through.
As of 2013, there are 409,000 miles of pipelines in the U.S. alone. This vast network of above ground and below ground pipelines carries roughly 17% of all ton/miles of U.S. freight. Pipelines do have some downsides, like higher initial expense; however, their pros generally outweigh the cons. The positives include:
Dedicated use and cost-effectiveness
Ability to transport large volumes
Unaffected by weather and can operate 24-7
Can reach more isolated oil and gas fields
Of course, as we mentioned, the cost of constructing a pipeline can be quite high, but they do provide less of a risk than rail transport.
In the end, both pipelines and rail/road transportation will continue to play critical roles in supporting the ever-growing North American oil and gas industries as long as they can maintain their feasibility, cost-effectiveness, and ultimately, a high-level of safety.