In precision stamping dies, the angle code, as a critical positioning element, has a systematic impact on the dimensional accuracy, form and position tolerances, and surface quality of the stamped product due to deviations in its installation position, affecting the die's closed state, material flow path, and stress distribution. When the angle code's installation position deviates, the closed state of the upper and lower dies changes, disrupting the originally precisely designed die clearance distribution. During stamping, the material flow path deviates from the preset trajectory due to clearance changes, leading to excessive stretching or compression in localized areas of the product. For example, in bending stamping, angle code deviation may cause the bending line to shift, resulting in out-of-tolerance bending angles or imbalance in symmetry, directly affecting the product's assembly compatibility.
Angle code position deviation can also cause misalignment and wear of the die's working parts. When the upper and lower dies are closed, if the angle code installation deviation causes the center lines of the punch and die to shift, the die cutting edge will experience asymmetrical lateral forces during stamping. This abnormal stress accelerates cutting edge wear, forming unilateral burrs or localized chipping, resulting in irregular flash or collapsed corners at the product edges. Simultaneously, the fitting accuracy of mold guiding components such as guide pillars and guide sleeves will decrease due to angle code deviation, potentially leading to mold jamming or premature failure after long-term operation, further deteriorating product quality stability.
In terms of geometric tolerance control, angle code installation deviation has a particularly significant impact on product flatness and perpendicularity. For multi-station progressive dies, angle code deviation is transmitted through accumulated errors between stations, causing the final product's flatness to exceed the design tolerance range. For example, in automotive body panel stamping, angle code deviation may cause localized dents or bulges in the fender, increasing the difficulty and cost of subsequent straightening processes. Furthermore, excessive perpendicularity directly affects product functionality; for example, abnormal insertion and extraction forces in electronic connector terminals may cause reliability issues such as poor contact.
The correlation between surface quality defects and angle code deviation is also significant. When angle code installation deviations cause uneven die clearance, defects such as scratches and orange peel will appear on the material surface during stamping due to localized frictional differences. In deep drawing processes, clearance deviations may lead to uneven material flow, resulting in ripples or wrinkles on the product surface, severely affecting appearance quality. For decorative parts requiring high gloss, such defects will directly lead to product scrapping, increasing production costs.
Angle code position deviations also indirectly affect die life management. Abnormal stress accelerates fatigue damage to critical die components and shortens die maintenance cycles. For example, in continuous stamping production, angle code deviations may increase the wear of the die per 10,000 strokes, causing the die to reach the scrap standard prematurely. This not only increases die replacement costs but may also affect production schedule execution due to downtime for maintenance.
From a process stability perspective, angle code installation deviations reduce the repeatability of the stamping process. In automated production lines, angle code deviations may cause robot gripping position deviations, leading to serious accidents such as incorrect loading or stacked material stamping. For the stamping of precision electronic components, such deviations can directly lead to product malfunctions, such as electrical performance abnormalities caused by chip pin deformation.
To control the impact of angle code installation deviations, comprehensive management is required throughout the entire process, from mold design and assembly debugging to production maintenance. During the mold design phase, the angle code positioning structure should be optimized, and high-precision guiding components should be used to reduce assembly errors.
During assembly, specialized measuring tools should be used for multi-dimensional inspection to ensure that the angle code position meets design requirements. During the production phase, a regular maintenance system should be established, using online testing equipment to monitor the mold status, promptly identify and correct angle code deviations, and ensure the long-term stability of stamped product quality.
