After all the parts of the stamping die are processed, an assembly operation is required. The assembly must be strictly in accordance with the specifications. If it is not assembled as required, the mold will be easily damaged during the mold test, causing irreparable losses. The specific operating points are as follows:

1. After the guide post is installed normally, it should be 1-2mm away from the lower end face of the die die seat. If you choose B guide sleeve, it should be 1-2mm away from the upper end face of the die die seat.

2. The matching gap between the concave and convex molds is uniform and consistent with the design requirements.

3. The top material and unloading device are correctly assembled to ensure that the waste materials and stamping parts are not stuck inside the stamping die.

4. The stamping dies that have been completely assembled have been stamped through the trial die, and the stamped parts punched out meet the requirements.

5. After the stamping die is assembled, first measure whether its overall height meets the design requirements. If there is a height, the cause should be carefully checked.

6. The matching clearance between the guide post and the guide sleeve should meet the design requirements, and each part is uniform.

7. After the guide post and the guide sleeve are turned into the upper and lower concave-convex molds, their axis lines must be perpendicular to the end surfaces of the concave-convex molds, and the end surfaces of the upper and lower concave-convex molds are parallel.

8. After the mold base is assembled, observe whether the upper mold base slides up and down along the guide post smoothly.

9. After the mold handle is installed in the upper mold seat, its axis line must be perpendicular to the end face of the punch, and the error should not exceed 0.05mm.

In addition, in order to improve the strength of the stamping die, a process after the stamping die is manufactured needs to finish the surface of the die to eliminate small cracks on the surface of the die and prevent the cracks from being enlarged to damage the stamping die during the strong impact of the press. . The following describes several commonly used finishing methods for stamping dies.

1. Manual grinding and polishing. Traditional mold surface processing methods mainly rely on the operator's experience and technology. Manual polishing is time-consuming and inefficient. Some more complex curved surfaces or seam grinding and polishing will be more difficult to handle.

2. Mechanical finishing—NC milling machine. The stamping die surface processing method is fast without processing, and the processing quality is good. Except for the cavity with an acute angle inside and the extremely narrow and deep cavity, other aspects can be competent. It has become the mainstream technology of stamping die processing abroad, and China is also actively developing.

3. Mechanical finishing—grinding. Common grinding processing equipment includes surface grinders, internal and external circular grinders, and tool grinders. In order to ensure accuracy, numerical control is generally used for processing. Select the appropriate type of grinder according to the shape of the part. Use flat surface grinder for plate type parts, internal and external circular grinder or tool grinder for arc surface and rotary surface parts.

4. There are also some non-mechanical finishing methods, such as ultrasonic machining, electric spark polishing, laser finishing, chemical polishing, and electrochemical polishing.

In addition, after the processing of the various parts of the stamping mold is completed, the assembly phase can be entered. Due to the high precision and small error of the mold parts, in addition to accurate positioning, the correct installation order must be arranged to ensure the normal work of the stamping mold. The upper and lower die seats of the punching die are installed, the upper die seat is installed on the slide of the punch or press, and the lower die seat is installed on the work surface of the punch or press. After the upper and lower mold bases are fixed, the mold parts can be installed on the mold bases to ensure the correct and precise installation position, to avoid errors that may cause the molds to not work properly. When installing the concave-convex die, a uniform blanking gap must be left in between to ensure the stamping quality and prolong the service life of the stamping die. The assembly sequence of the upper and lower molds should be determined according to the mold structure, and different installation methods are determined for mold installation with and without guide pillars. For the installation of complex stamping molds, a reasonable assembly order needs to be determined according to the limit of the upper and lower mold parts installation. Sometimes the improper installation sequence not only affects the subsequent installation work, but also may not be installed, so the correct installation sequence is very important.