Custom Stamping Die
In the manufacturing field, custom stamping die plays a crucial role in shaping and transforming raw materials into complex functional components. The requirements for each type of stamping die are different, and each technology has its own unique characteristics.
Assembly of Custom Stamping Die
The assembly of custom stamping die plays a crucial role in the manufacturing process of custom stamping die. The quality of assembly directly affects the quality of the processed stamped parts, the manufacturing status of the mold itself, and the service time.
Assembly Steps of Custom Stamping Die
The assembly steps of custom stamping die mainly include two aspects. The first aspect is to assemble the processed custom stamping die parts according to the design requirements, including overall assembly; The second content is to supplement and repair some of the machining content during the assembly process of custom stamping die. The assembly of stamping die is based on the overall assembly drawing of the custom stamping die design, where all custom stamping die components are assembled and each component is assembled into a whole. Technicians should follow the prescribed assembly process steps during assembly.
1.Preparation Before Assembly of Custom Stamping Die
Operators are proficient in mastering assembly drawings. Clean and inspect the parts of the stamping die. Ensure a clean workplace and prepare standard parts and raw materials.
2.Content of Stamping Die Assembly Components
Component assembly refers to the local assembly task of connecting several different parts of a stamping die into a component according to specified technical requirements before the final assembly. Such as the assembly of mold frames, the assembly of convex or concave molds and their fixing plates, and the assembly of unloading parts. To effectively improve the precision of the entire stamping die, technicians must assemble the above components according to technical requirements.
3.Content of Assembly of Custom Stamping Die
The benchmark components for assembly should be selected, and the installation sequence of the upper and lower molds must not be incorrect. Assembly should be carried out after ensuring the accuracy of the sequence, effectively improving assembly accuracy and meeting the specified technical requirements.
The Method of Assembly of Custom Stamping Die
There are many methods for assembly of custom stamping die, the first step is to determine the reference part based on the dependency relationship of the main components on the mold during assembly. The convex and concave molds, convex molds, concave molds, and discharge plates can all be used as assembly reference components. After selecting the reference parts, assemble the main components. There are several assembly methods:
1.Interchange Assembly Method
The interchange assembly method is an assembly method in which the various components of the dimension chain are assembled during stamping die assembly, without any changes in shape or position. After assembly, it can reach the tolerance range of the closed ring. This method adopts the method of ensuring the dimensional accuracy of parts and controlling their machining errors, intending to improve assembly accuracy. During assembly, the dimensions of each matching part or its assembly unit do not need to be modified or adjusted to meet the accuracy requirements of stamping die assembly.
If large-scale manufacturing of custom stamping die consists of guide pillars and guide sleeves, controlling the machining errors of the outer circle of the guide pillars and the inner hole size of the guide sleeves can help improve interchangeability. Therefore, there is no need to choose and it can meet the assembly requirements. When it is required that the components of the stamping die are damaged, they should be repaired promptly. The interchangeability of component dimensions is very high. At this time, it is necessary to strictly control the manufacturing technology error of component block sizes, to achieve the high-precision requirements of the interchangeability assembly method.
2.Repair and Assembly Method
During assembly, grinding the reserved repair amount on the parts of the designated stamping die, and removing some material from the compensation ring in the dimension chain to change its actual size, so that the closed ring is within the tolerance range and meets the limit deviation requirements, and the method of improving assembly accuracy is called repair assembly method.
There are several characteristics of the repair and assembly method. Technicians should design and calculate the dimensions and tolerances of repair parts to help ensure the repair quantity without making it too large. To reduce labor tasks, other tools such as mechanical processing, electric, and pneumatic repair tools must be used to assist. The manufacturing tolerance range of the workpiece can be large, but the defect is that there is a large amount of repair and assembly, which requires high technical skills from technical workers. Due to high precision, it is difficult to achieve the requirements of high-precision machining of parts. Therefore, the repair and assembly method. It is a commonly used assembly method in stamping die manufacturing. Parts that are only related to the assembly accuracy of this product and unrelated to other assembly projects should be selected as repair objects and workpieces that are easy to install and disassemble and have a smaller repair area should be considered as repair parts.
3.Adjusting the Assembly Method
When using the adjustment assembly method of stamping the die for assembly, the actual size or position of the compensation ring is adjusted. The compensation ring has many components, including adjusting the clearance of connecting parts, oblique washers, and bolts, to make the closed ring meet the tolerance and limit deviation requirements.
The adjustment assembly method is increasingly used in the assembly of custom stamping die. When assembling combined custom stamping die, to ensure the clearance between convex and concave parts and form the cutting edge, the method of adjusting bolts and inclined surfaces is often used to change and fix the position of the assembled components, to meet the requirements of stamping die assembly.
4.Assembly and Assembly Method
There is a method for the assembly of custom stamping die, which is called subassembly and matching: The actual dimensions of each component ring in the size chain are grouped according to their different sizes, and parts in the same group can be assembled interchangeably. The assembly method requires that the fitting tolerances of each group of matching parts are within the allowable range.
This method is commonly used in small batches of workpieces and has extremely high assembly accuracy requirements. It is generally not necessary to control machining errors to ensure interchangeability and assembly accuracy. For the production of guide pillars and guide sleeves, in most cases, the grouping assembly method is used to efficiently amplify the errors of the processed parts. The interchange assembly method is generally not used because it requires high precision in part machining.
Processing and Assembly of Custom Stamping Die
Try to have one technician complete the processing of each part on a stamping die. When cutting the first convex mold, the actual size must be measured and tested with the concave mold after cutting. It is necessary to ensure that the fit gap meets the standard requirements, and after gaining experience, other convex molds can be cut. After cutting, do a good job of inspection to ensure that the actual size difference between the convex and concave molds, i.e. the gap value, fully meets the requirements of the drawing on the entire set of custom stamping die.
The size and accuracy of the step distance play a crucial role in the machining process of progressive custom stamping die and must meet the requirements of the drawing design. At present, the step accuracy of general progressive custom stamping die cannot exceed 0.01 millimeters, which can be guaranteed by ordinary wire-cutting processing. The step precision requirement for progressive custom stamping die with high precision characteristics cannot exceed 0.005 millimeters, which can be guaranteed by high-precision CNC wire cutting or coordinate grinding.
The six sides of the template shape should have smoothness, and the two sides should be perpendicular to each other and not parallel. This is to be useful as a reference for future custom stamping die. For complex holes and threading holes, there should be a process diagram showing the coordinate position of the threading hole center, which has a significant impact on marking and inspection.
The discharge plate has two main functions in ordinary progressive custom stamping die, such as pressing and discharging. In multi-station precision progressive custom stamping die, the unloading plate has many functions, such as pressing and unloading, and it also plays a protective and guiding role on small convex molds. Therefore, alloy tool steel is commonly used and processed through quenching and hardening treatment.
The processing accuracy of the discharge plate has high requirements in multi-station precision progressive custom stamping die. It reflects good accuracy, such as position accuracy and fit accuracy with the convex mold, as well as secondary guidance accuracy between the discharge plate and the concave mold. The secondary guide fit clearance is not only smaller than the fit clearance between the mold base guide pillar and guide sleeve but also smaller than the fit clearance between the convex and concave molds to be reasonable.
The processing method of forming holes is related to many factors, mainly related to the structural form of the concave mold. The most commonly used processing method for overall concave molds is wire cutting, with inlay parts processed by forming grinding, and inlay concave molds processed by wire cutting and forming grinding, that is, the frame body processed by wire cutting.
The assembly requirements of custom stamping die are mainly to ensure the uniformity of the punching clearance, which is the key to meeting the standard requirements for custom stamping die assembly. Assembly technology mainly ensures the accuracy of custom stamping die.
Related News
Applied’s expertise in modifying materials at atomic levels and on an ihdustrial scaleenables our customers to transform possibilities into reality.
