Basic Concept of Fixture design

Fixture Design

        A fixture is a complicated device. Whose role it is to hold the work piece for the machining operation so that the machine tool may readily machine the work piece. Engineers that enjoy difficult tasks welcome the challenge, understanding how critical fixturing is in CNC machining. Making dependable CNC fittings necessitates some science and a touch of art, in addition to competent engineering.

Software for Fixture Design

​               The fixture may be designed using any CAD/CAM programme (such as Autocad, SolidWork, Catia, etc.), or you can draw it out on paper.

Method of Fixture

·        Identify and comprehend the needs

·        Develop a design concept

·        Assess and improve the design

·        Complete the design

·        Build the fixture

·        Test and validate the fixture

·     Implement and maintain the fixture

1. Identify and comprehend the needs: The identification and comprehension of the fixture's requirements is the first step in the fixture design process. This entails being aware of the product, the manufacturing procedure, the materials utilised, and any other unique fixture requirements.

2. Develop a design concept: After determining the requirements, the fixture's design concept must be developed. This include generating concepts, making rough sketches of designs, and choosing the fixture's general structure and shape.

3. Assess and improve the design: After developing the design concept, it's critical to assess it and make any necessary improvements. In order to do this, the design may need to be put to the test, modified, and adjusted based on input from stakeholders.

4. Complete the design: The design can be completed when it has been assessed and improved. This comprises choosing materials, choosing comprehensive designs and specifications for the fixture, and figuring out any tweaks or revisions that are required.

5. Build the fixture: Now that the design is complete, the fixture may be constructed. This comprises building the fixture, making sure it complies with all essential specifications, and choosing the right tools and materials.

6. Test and validate the fixture: Once the fixture has been constructed, it must be tested and verified to make sure it works properly and complies with all regulations. To make that the fixture functions as expected, this may entail carrying out stress tests, quality control checks, and other tests.

7. Implement and maintain the fixture: Lastly, the fixture can be installed and maintained after it has been tested and certified. In order to accomplish this, staff must be trained on how to use the fixture, it must be properly maintained and repaired as necessary, and it must also undergo any necessary modifications or enhancements over time.

The Most Important Aspect of Fixture Design

I can give you some simple steps that can help you design a fixture:

1. Identify the fixture's purpose: Before you begin designing the fixture, you must first define its function. You must understand the task or process for which the fixture will be employed; this will inform your design choices.

2. Consider the part or component to be fixed: The design of the fixture should be dependent on the size, shape, and weight of the part or component to be held. The fixture must be sturdy and solid enough to hold the part securely in place while it is being worked on.

3. Choose materials: Pick materials that are long-lasting, sturdy, and able to endure the stresses exerted by the procedure.

4. Determine the configuration of the fixture: Decide whether the fixture will be fixed or moveable. Determine the amount of components required for the fixture as well as their placement.

5. Produce a thorough design: Sketch out a detailed sketch of the fixture, including all measurements and details. Ascertain that the fixture is appropriate for the workplace and that all parts are properly aligned.

6. Prototype and test: Create and test a prototype. Make any necessary changes and retest until you reach the desired outcome.

7. Complete the design: Once you've selected the perfect fixture design, complete it with fully detailed drawings, specifications, and production instructions

Keep in mind that designs will differ depending on the type of fixture and its intended usage. To guarantee that your fixture design is practical, safe, and cost-effective, you must be as detailed as possible and collaborate closely with specialists in the industry.

Let's begin creating the fixture now that we are aware of all these factors. We locate the component and repeat it to bring the grip into motion. in order for the component to always be clamped in place. There should always be two locations. for the purpose of locking the part's X- and Y-direction. Alternately, we may state that the part's orientation can be locked. Afterward, decide where to place the clamp. Always keep in mind that the part may be put into the fixture with ease. and can be drawn out. Moreover, the machine's tool holder must never contact the fixture while it is being machined; otherwise, a serious accident may occur.

How to apply pneumatic clamping to a fixture

        Pneumatic clamping in a fixture is a popular method of holding workpieces during machining operations. Here are the steps to use pneumatic clamping in a fixture:

1  Check that the compressed air supply is connected to the pneumatic clamping system.
2.  Place the workpiece into the fixture and position it correctly for machining.
3.  Move the clamps into position using the pneumatic control valve.
4.  Apply pressure to the clamps until they are securely holding the workpiece.
5.  Start the machining process while making sure the clamps are securely fastened.
6.  Using the pneumatic control valve, release the clamps' pressure after the machining is finished.
7.  Remove the workpiece from the fixture with care.
8.   Repeat the process for subsequent workpieces.

Keep in mind that for best performance, the pneumatic clamping system needs to be properly maintained and adjusted on a regular basis.

How to Apply Hydraulic Clamp to a Fixture

        Hydraulic clamping is an effective way to secure workpieces in a fixture. Here are the steps to use hydraulic clamping in a fixture:

First, mount the hydraulic clamps securely in the fixture. Make sure they are positioned at the right locations to hold the workpiece firmly.

Make sure the hydraulic lines are attached to the clamps securely and tightly.

Connect the hydraulic pump to the hydraulic lines and turn it on. The pump will generate pressure that will be used to clamp the workpiece.

 Place the workpiece in the fixture and align it properly.

After the workpiece has been properly positioned, operate the hydraulic clamps to clamp it. The hydraulic pressure will produce a firm and solid grip.

 Change the clamping force as needed by altering the hydraulic pressure. Increased pressure results in a tighter grip, but be careful not to damage the workpiece.

When the workpiece is finished, turn off the hydraulic pump and release the clamps to remove the workpiece from the fixture.

        You can utilise hydraulic clamping in a fixture to firmly hold and machine workpieces by following these procedures.

 How to apply Work support to a fixture

            There are some fixtures in which we occasionally must install work support. We then do so in the fixture. when the part is not supported on the side of the machining face opposite from the part. Then, under those circumstances, we apply work support. It is used when a part is in a unique condition.

            We've learned from this experience how crucial it is to be able to view and confirm that the part is in alignment with the work support. Similarly, practical experience demonstrates the importance of adequate chip removal and fixture upkeep. The engineer, who has manufacturing expertise, optimizes the design from their point of view, which takes into account efficiency, ergonomics, and usability in addition to cost, strength, and aesthetics.