Sheet Metal Processing
Product Name
Sheet metal is a comprehensive cold-working process for metal materials (usually under 6mm plate). Including cutting, punching/cutting/composite, folding, riveting, splicing, forming (such as car body) and so on. Its distinguishing feature is the uniform thickness of the part.
Sheet metal processing, sheet metal processing manufacturers, stainless steel sheet metal processing, chassis sheet metal processing, sheet metal manufacturers, precision sheet metal processing, sheet metal processing, sheet metal bending processing, Sheet metal molding
Sheet metal processing includes conventional methods such as cutting blanking, blanking, bending and forming, and various process parameters. It also includes various cold stamping die structure and process parameters, various equipment working principles and operating methods, and also includes new stamping techniques. And new technology.
Technology
1. Non-mold processing:
Through NCT (CNC punching), laser (laser cutting machine), CNC bending machine tools, rivets and other processing tools for processing sheet metal, generally used for sample production, the cost is higher.
2. Mold processing:
Through the fixed mold, processing sheet metal. Generally, there are blanking molds and forming molds, which are mainly used for mass production and have lower costs.
3. NCT (CNC machine) processing
Common uses of CNC machine tools: blanking, punching net holes, punching convex hulls, trimming edges, bumps, pressure ribs, pressure lines, pumping holes. (Pressing line, is a variety of post-embossing processing methods, such as bronzing, convex, embossed, plastic, pressure line, beer, stick, cut, etc. are all postpress processing.
The minimum distance between two pressure lines is generally 3mm, but it also varies slightly depending on the processing object. ) CNC machining accuracy: +/- 0.1mm.
4. Laser (laser cutting) processing
Laser cutting is the use of electron discharge as the energy source, through He, N2, CO2 and other mixed gases as the excitation medium, the use of a group of mirrors to produce a focused laser beam, so as to cut the material.
Driven by a programmable servo motor, the cutting head moves according to a predetermined path to cut various shapes of workpieces. Common Uses of Laser Machines: Cutting, Shape Cutting, Secondary Cutting, Cutting Lines, Machining Accuracy of Cutting Shaped Hole Laser Machine: +/-0.1mm
5. Folding bed processing
Bending processing fixes the upper and lower molds on the upper and lower worktables of the folding bed, and uses hydraulic transmission to drive the relative movement of the worktable. In combination with the shape of the lower die, bending of the sheet is achieved.
It is generally divided into up and down movements. The basic principle of the bending process sequence: bending from inside to outside. Bending from small to large. First fold the special shape, then fold the general shape.
After the former process is formed, there is no interference with the subsequent process.
Bend processing accuracy:
One fold: +/-0.1mm
Two fold: +/-0.2mm
Tri-fold: +/-0.3mm
6. Clamp processing
Crossed, Chisel cut, Sawing, Tumble, drilling, Reaming, Countersink holes,Tapping threads and sets of threads, straightening and bending, riveting, scraping, grinding, technical measurement, simple heat treatment, etc., and can be assembled, commissioning and maintenance of the machine or parts.
1) Processed parts:
Some machining methods that are not suitable or cannot be solved by mechanical methods can be completed by fitters. Such as: the part of the process of marking, precision processing (for example, scraping and cutting template and making molds, etc.) and inspection and repair and so on.
2) Assembly:
Parts are assembled according to assembly technology requirements for mechanical equipment, component assembly and final assembly. And make adjustments, inspections and commissioning, etc. to become qualified machinery equipment
3) Equipment maintenance: When the machinery is in use, there is a fault, damage occurs or the precision is reduced after long-term use. When affecting the use, it is also necessary to carry out maintenance and repairs through fitters.
4) Manufacturing and repair of tools: Manufacturing and repairing various tools, fixtures, measuring tools, molds and various specialized equipment.
7. Sheet metal connection
The connection methods between sheet metal parts mainly include: locking screws, rivet pull rivets, pumping holes riveting, hook card slot, spot welding and hinged connections.
(1) Lock screw: The lock screw is the most commonly used connection method at present
① Principle: In the connected two parts, there is a part of the tooth hole, only punch on the other part; Tapping on tooth extraction (Tapping in two ways: Self-tapping - Tapping a screw while tapping a screw with a tapping screw; A tapping machine tapping.) Finally connected with screws.
(2) Pull rivets:
① Principle: As shown in FIG 3, the two parts of the pull stud is inserted into a corresponding hole, Pull the pull rod 4 with a pull gun until it breaks. The pull rod head 1 moves downwards, so that the outer pull sleeve 3 that is outsourced becomes larger and larger than the diameter of the hole. In order to achieve the purpose of connecting two parts.
(3) Suction hole riveting:
① Principle: As shown in Figure 5, Part 1 (with C'sink hole) and Part 2 (with Extrude hole), Extrude hole is opened by a mold and filled in the corner hole of the C'sink hole to connect the two parts together.
(4) Spot welding:
① Advantages: Spot welding fastening, for suppliers to complete, easy production line operation, low cost (about 0.05HKD for spot welding); parts without complicated structure, simple mold
(5)Clasp card position
① Features: Clasp card position connection is generally prepositioned, can not directly fasten the parts, usually with the lock screw and rivet pull riveting and other connections with the use.
(6) Hinge connection:
① Advantages: The connected parts can be rotated around the shaft for easy assembly and disassembly.
Structure Description: the hinge connection method includes a hinge bracket. The hinge bracket is fixed on one part by a pull nail or a screw. The other part has a hinge sleeve hole. The hinge bracket and the hinge sleeve hole are connected through the rotating shaft, and the collar holds the spindle on the bracket. prevent it from falling off.
