Industry

Zhejiang Balford Mechatronics Co., ltd focus on difficult stamping & deep drawing. Main product: motor housing and difficult custom deep drawn stampings.

  • Stamping

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    Stamping (also known as pressing) is the process of placing flat sheet metal in either blank or coil form into a stamping press where a tool and die surface forms the metal into a net shape. Stamping includes a variety of sheet-metal forming manufacturing processes, such as punching using a machine press or stamping press, blanking, embossing, bending, flanging, and coining. This could be a single stage operation where every stroke of the press produces the desired form on the sheet metal part, or could occur through a series of stages. The process is usually carried out on sheet metal, but can also be used on other materials, such as polystyrene. Progressive dies are commonly fed from a coil of steel, coil reel for unwinding of coil to a straightener to level the coil and then into a feeder which advances the material into the press and die at a predetermined feed length. Depending on part complexity, the number of stations in the die can be determined.

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  • Precision motor core

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    The iron core is an important part of the motor product, generally made of 0.35mm, 0.5mm thick silicon steel sheet. In all aspects of motor production, core punch production is the key. At present, China’s high-speed precision stamping iron chips and iron cores are automatically riveted, Three cores with twisted slot rivets, Iron core with twist groove and rotary rivet, Core double-turn rivets, iron double-row rotary rivets, Large outer rotor core with twisted slot rivets, Stator core semicircle combination riveting, Stator core multi-piece stack riveting, The combination of high-speed precision stamping production technology such as long straight-bar stator core coils and stacking rivets is not inferior to international advanced technology.

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  • Aluminium Motor Housing

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    We are manufacturing aluminium motor housing that is used in air circulaters, exhaust fan, etc. Padmawati extrusion is acknowledged among the efficient motor aluminium housings manufacturers and suppliers. We offer aluminium motor housings in customer specified sizes. We offer aluminium motor housings with superb strength at market leading prices.
    Features:
    Ability to withstand harsh conditions
    Rust resistance
    Excellent finish

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  • Die Casting Motor Housing

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    Aluminum alloy has been the widest material used in motor housing. This is no surprising, as it has many advantages, such as easily machining, strong, high light-to-weight ratio, aesthetic, durability, as well as recycle characteristic. Those features make it to be an idea option for motor housing material.

    we have specialized in aluminum die casting processing for motor housing for lots of years.

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  • Precision Metal Stamping

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    Zhe Jiang Balford Metal Stamping operates as a prime producer of precision stampings in all shapes, sizes, and materials, striving to consistently meet and exceed the needs and expectations of our customers. 

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  • High Precision Metal Stamping

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    Our in-house tool and die shop enables us to start metal stamping parts as soon as your design is approved. We have the capabilities to robotically transfer parts from die to die in the stamping process, for fast, efficient production. We also utilize progressive dies and hand fed line dies to produce precision metal stamping parts. These capabilities allow us to provide exceptional precision and part-to-part repeatability.

    Our engineering and tech group will work with you as needed to refine your designs and develop a final product that will meet or exceed your expectations.

    Vision can produce metal stamping parts and components from a range of materials and alloys, including carbon steel, stainless steel, aluminum, and others. We work in thicknesses up to 20 mm.

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  • What Is Stamping?

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    Stamping or pressing is a manufacturing process used to convert flat metal sheets into final shapes. In this process, a flat sheet of metal, either in the form of a blank or in the form of a coil, is placed in a stamping press where a tool and die surface forms the metal into a final shape.

    Stamping encompasses a variety of sheet metal forming manufacturing processes, such as punching using a machine press or stamping press, blanking, embossing, bending, flanging, and coining.

    This could be a one-step process where each stroke of the press creates the desired shape on the sheet metal part, or it could be done through a series of steps. The process is usually carried out on sheet metal, but can also be used on other materials such as polystyrene.

    Progressive dies are commonly fed from a coil of steel, coil reel for an unwinding of the coil to a straightener to level the coil and then into a feeder which advances the material into the press and dies at a predetermined feed length. Depending on part complexity, the number of stations in the die can be determined.Stamping is usually done on cold metal sheets. See Forging for hot metal forming operations.

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  • Factors influencing the dimensional accuracy of metal stamping parts

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    Different metal stamping products have different requirements for accuracy. As long as we meet the accuracy requirements of customers and comprehensively consider production costs, we can produce qualified stamping parts. The factors that affect the dimensional accuracy of metal stampings must be known by everyone. Let’s have a look together.The dimensional accuracy of metal stamping parts refers to the difference between the actual size of stamping parts and the basic size. The smaller the difference, the higher the dimensional accuracy of metal stamping parts.

    The influencing factors are as follows:

    1. Manufacturing precision of metal stamping die.

    2. Gap between male and female dies.

    3. Elastic recovery of materials after stamping.

    4. Accidental factors in the production process, such as inaccurate positioning, unstable material performance, etc.

    It can be divided into precision level and ordinary level. The ordinary level is the precision that can be achieved by more economic means, while the precision level is the precision that can be achieved by stamping technology.

    The surface quality of metal stampings shall not be higher than that of raw materials, otherwise, subsequent processing is required to achieve it, increasing production costs.

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  • Motor Housing

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    METALLECA® Motor housings are widely used in generators and electric motor series. The power of motor is range from 1KW to 20KW. The materials of the housing are no longer limited to steel and pig iron as in the past, then the thin and lightweight stainless steel and aluminum alloy are also more popular. Our production of motor housing is made aluminum alloy and common carbon steel. The housing of the motor has a protective effect and functions as a component mounting frame. In addition, some special models of motor housings also have functions with heat dissipation or sound insulation.

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  • What is motor housing?

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    As the benefits and proportion of motor housing production become increasingly prominent in the manufacturing industry, it is very necessary to understand and master the design and manufacturing process of motor housings.

    Deep drawing is a processing method in which punched flat blanks are pressed into hollow pieces with various openings or the finished hollow pieces with openings are processed into hollow pieces of other shapes. The force process of the motor housing deepening is similar to the change of the fan-shaped blank being pulled through a wedge-shaped slot. While being elongated in the diameter direction, the tangential direction is compressed. In the actual drawing process, of course, there are no wedge-shaped grooves, and the fan-shaped small unit bodies on the blank do not exist alone but are in an interconnected and tightly integrated whole blank.

    The thickness of the workpiece obtained after the deep drawing is different from the bottom to the mouth. The thickness of the upper part of the sidewall of the cylinder increases the most, about 30%; the thickness of the sheet is the smallest at the corner of the cylinder wall and the bottom, and the thickness is reduced by nearly 10%, where it is most likely to be broken during deep drawing. When the stress of the section exceeds the strength limit of the material at this time, the part will crack here. Even if the drawn part is not cracked, the product may be scrapped due to excessive thinning of the material.

    At present, a large-area motor casing is being processed. The original process is to align the shape of one end to straighten the middle, position the hole, and process the end to form the motor casing through the four-jaw clamp for vertical vehicles. When this method is not easy to operate and the vertical processing is not accurate, the production efficiency is low. How to shorten its production cycle, improve labor productivity, and reduce its production cost under the premise of ensuring the quality of parts processing is particularly important.

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  • Causes of deformation in metal stamping

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    Hardware stamping processes include blanking, bending, stretching, forming, etc. Common processing materials include stainless steel, iron, aluminum, copper and other metal materials. Hardware stamping manufacturers will encounter some quality problems during stamping, such as deformation. Next, Xiaobian will explain the reasons for the deformation of metal stamping.1. Stereo pressing: redistribute the volume and transfer the material to change the blank shape or height thickness.

    2. Bending: turn the flat sheet into a bending part, further change the shape of the bending part, including bending, curling, twisting, etc.

    3. Rolling: Punch the flat blank into the hollow part of the required shape, or further change the size of the hollow part.

    4. Cutting and blanking: unclosed or unclosed to separate part of the material from another part, including blanking, punching, trimming, cutting, sectioning, cutting, etc.

    5. Forming: change the shape of the workpiece or blank with local deformation of various properties. The forming deformation includes undulating forming, flanging, necking, protruding belly, rolling and shaping.

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  • Deep drawing

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    Deep drawing is a sheet metal forming process in which a sheet metal blank is radially drawn into a forming die by the mechanical action of a punch. It is thus a shape transformation process with material retention.

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  • How to deal with the rebound of metal stamping parts

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    When the metal stamping parts spring back, which is commonly referred to as springback, elastic deformation occurs due to insufficient plastic deformation during the stamping process. Once this problem occurs, it should be corrected in time, otherwise the shape and size of the stamping parts produced by processing will have a large error, which does not meet the requirements of the stamping process. Here are some solutions.1. Improve some structures in the workpiece design to reduce the rebound angle;

    2. Consider reducing springback in mold design;

    3. Adopt stretch bending process;

    4. Use other process methods.

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  • Introduction of Hardware Stamping Die Blank Holder

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    The blank holder of the metal stamping die is a pressing device mainly used to prevent the wrinkling of the stamping and drawing products in the drawing process. Variable blank holder control through blank holder can greatly reduce the cost and has strong practicability. The following is a brief introduction to the blank holder by the hardware stamping parts manufacturer.1. The blank holder is a kind of pressing part on the die used for metal stamping and drawing, which is used to prevent the wrinkling of the workpiece wall or flange during the drawing.

    2. Structure

    It mainly includes the upper layer, small top pillar and lower layer. The upper layer is elastic material, the upper layer is in contact with the flange area of the slab blank, and the lower layer is connected with the top bar. A number of small top pillars are embedded between the upper layer and the lower layer through the sink. There is a small length difference between the small top pillars, generally 0.1mm. According to the actual needs, different numbers and lengths of small top pillars are embedded in different areas.

    3. Two kinds of common blank holder

    (1) Elastic blank holder is divided into spring pad, rubber pad and air cushion blank holder of the press itself, which is used for processing shallow drawing parts;

    (2) The rigid blank holder is applicable to the stretching or forming of large pieces with large height.

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  • The difference between steel stamping and copper aluminum stamping

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    Zhejiang Baifudu Precision, a manufacturer of precision metal stamping, stretching and precision overtime, high-quality raw materials, good product quality, rich customization experience and timely delivery. The processing materials we use include stainless steel, aluminum, copper, nonferrous metals and some alloys, which are commonly used by stamping manufacturers. Here is a brief introduction to the difference between steel stamping and copper aluminum stamping.The commonly used steel plates are carbon steel and stainless steel, and the non-ferrous metal plates include aluminum, copper and their alloys. They have high plasticity and low deformation resistance, and are suitable for cold stamping.

    (1) Copper aluminum and its alloys are widely used as components of electrical equipment because of their good ductility and excellent conductivity.

    (2) The stamping process of carbon steel and stainless steel is often used to manufacture equipment shells, structural parts, boxes, etc., but because of its strong stiffness, stamping oil is usually used to improve the process.

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