Changzhou Stamping parts are rich in processing types and complex shapes, and bad problems are solved
One is to open materials according to production needs. After opening, some small parts such as small parts can be produced by punching and then gong cutting or CNC processing. This is a lot in the production of glasses accessories and auto parts. When making a container, it is necessary to burn and weld after cutting and punching, then sanding and spraying, and then assembling the accessories before shipment. For small parts, many polished surfaces are processed, electroplated or sprayed with oil. Then welding or screwing assembly packaging and shipping.
Changzhou stamping parts processing methods include turning, milling, planing, grinding, clamp, stamping, casting and other methods.
Stamping: Stamping uses pre-made molds to perform cold punching processing, mainly for sheet metal processing, that is, most of the processed materials are sheet materials, and the processing efficiency is relatively high and suitable for mass production. The processing technology is divided into engineering molds and continuous molds. Engineering molds are also called single-punch dies. Some more complex parts require several sets of molds. The continuous mold is in the cavity of the mold to split the shape of the product into several parts. In a mold, one stroke processed by such a punch is a finished product. The high-speed continuous punching machine can process three to four hundred products per minute.
Lathe: Lathe is a precision processing machine, divided into ordinary lathe, automatic lathe, instrument lathe and computer lathe. It uses the turning tool to perform radial or axial machining by clamping the material and then rotating it. Nowadays, automatic lathes and computer lathes are more and more widely used. Because both of these are fully automatic processing, the accuracy error caused by human operation is reduced to the bottom, and the processing speed is fast, which is used for mass production. Most of the current computerized lathes are equipped with side-rotating tools and back-rotating tools, which means that the lathe can also be milled.
The production terms of Changzhou stamping parts processing
- 1. Pillow position-the sealing part where the cavity protrudes from the parting surface;-
- 2. Wipe through position-the part where the front and back molds are in the vertical direction (usually 3-5 mold exit angles).
The pillow position appears when the PL position jumps. In order to better seal the glue (anti-pick-up front), it must be pulled out horizontally.
The straight cut is inserted through, which is easy to wear, and the FIT mold is also a bit troublesome, and it is easy to leak glue from the inserted position and produce a sharp edge.
Therefore, a major principle of mold parting is-never penetrate what can be touched.
The long side is the pillow position, and the side is the penetrating position.
- Row Position-Slider
- Ranking-product layout on the mold
- Glue position-the cavity of the product on the mold
- Bone position-tendons on the product
- Column position-column on the product
- Vacant position-gap
- Tube position-the part used to limit the position-
- Buckle-hook for product connection
- Impact position-the part of the mold that is close to the middle of the front and rear molds.
Stamping processing is the production technology of using the power of conventional or special stamping equipment to directly subject the sheet metal to the deformation force and deform in the mold, so as to obtain product parts with a certain shape, size and performance. Sheet materials, molds and equipment are the three elements of stamping processing. Stamping is a method of metal cold deformation processing. Therefore, it is called cold stamping or sheet metal stamping, or stamping for short. It is one of the main methods of metal plastic processing (or pressure processing), and it also belongs to material forming engineering technology. The die used for stamping parts is called Stamping Die, or die for short. The die is a special tool for batch processing of materials (metal or non-metal) into the required stamping parts. Punching dies are very important in stamping. Without a die that meets the requirements, mass stamping production will be difficult; without advanced stamping dies, advanced stamping processes cannot be realized. The stamping process and die, stamping equipment and stamping materials constitute the three elements of stamping processing. Only when they are combined can stamping parts be obtained.
The punching process of the middle protective surface bracket is: blanking and punching-punching incision-flanging forming-incision-flanging. There are various forms of tearing and skew during the forming process of the middle protective surface bracket. The tearing parts are mainly distributed at the hole pattern of the workpiece, and the R arc at the corner of the side wall and the junction of the wall neck, etc., due to the forming of the stamping parts
The production process conditions are different, and the proportion of each fractured part is different. The tear can be a one-time forming tear, or a tear caused by the development of fatigue cracks, that is, invisible cracks.
According to the actual situation of the site, by inspecting the tearing position, fracture shape and degree of crushing of the part, it is believed that the tearing and skewing behavior of the part is mainly reflected in the flanging forming process. The reasons for this process are as follows:
1. Defects in the design of the flanging forming die
This mold is shared by the left and right parts of a mold with two cavities. Because the content of this process is not only the flanging, but also the shape forming content, and the part is particularly complex, the curved surface is narrow, and the forming requires that the concave die press core and the forming surface match, etc. As a result, the mold structure condition has a large forming stroke and a small pressing area. In the initial mold design, the designer only considered the feature of small blanking surface, but ignored the guiding slip stroke of blanking core.
2. There are errors in mold processing parts and drawing design
Since the blanking core is a complex surface, the guide surface is machined after the casting is formed, which results in a gap error after the machining surface and the guiding surface of the die are slidingly matched. The blanking core left/right appears during the normal operation of the mold. swing.
Since the guiding gap of this structure is the adjustment sliding gap, once it is damaged, there will be no more effective adjustment means, which will affect the forming quality of the part for a long time and bring potential safety hazards. Moreover, instead of using a special guide slide at the guiding part, it adopts a mutual guiding structure of the processing profile. There is a defect that the gap can not be adjusted after the gap is too large, resulting in tearing and skewing of the parts.
3. The forming process parameters are not in place
In the process of forming parts, the process requires that the die, the blanking core and the two parts must be tightly attached together, and the sheet material is forced to plastically deform when the machine tool slides down to realize the forming. However, due to the shortcomings of the pressed parts such as unstable quality, it shows that the pressure of the machine tool is in a state of unbalanced pressure fluctuation during the production process. The main reason is that the processing technicians did not adjust the pressure of the machine tool at this stage in time according to the requirements of the process designation, or did not communicate with each other about the pressure stability information of the machine tool during the handover of each shift, resulting in poor quality of the parts. Stablize.
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