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Horizontal Hydraulic Press Officially Put into Use, Stable Hot Forging Quality of Hexagon Bolts

发布时间：

2026-06-01

Recently, a key equipment for our company’s hexagon bolt production line — the horizontal hydraulic press — was officially put into production and operation. This equipment is mainly used for the hot forging forming process of hexagon bolts, adopting a horizontal forging method to press the heated bar stock once to form its head into a hexagonal shape. After continuous multi-batch production verification, the horizontal hydraulic press operates stably, and the produced hexagon bolt blanks have accurate dimensions and full heads, with the product qualification rate reaching the expected target.

Entering the forging workshop, the horizontal hydraulic press is installed between the heating furnace and the subsequent conveyor chain. The operator feeds the bar stock heated to the process temperature into the mold station. After the horizontal hydraulic press is started, the indenter advances horizontally to extrude the end of the bar stock into a hexagonal head. The whole process features uniform striking force and stable movement. The formed workpiece is pushed out by the ejection device, falls into the conveyor chain and is transported to the material frame.

According to on-site technical personnel, compared with traditional vertical presses, the horizontal hydraulic press has certain advantages in the production of long rod bolts or bolts with high head forming requirements: horizontal feeding is smoother, mold positioning accuracy is high, and it is easy to dock with automatic feeding mechanisms. The horizontal hydraulic press put into use this time has been parameter-optimized specifically for the hot forging process of hexagon bolts, and can cover multiple specifications of products from M10 to M30.

From the perspective of actual production data, the effects brought by the horizontal hydraulic press are reflected in three aspects:

First, the hexagonal head is fully formed. The equipment has a stable pressing process, and the metal material fully fills the mold cavity. The hexagonal edges are clear, free of missing corners or burrs, and the matching surface with the subsequent wrench has good accuracy.

Second, good dimensional consistency. After continuous multi-batch production, the distance between opposite sides of the product head, thickness and coaxiality of the rod are all controlled within the drawing tolerance range, with small fluctuations between batches.

Third, the equipment operates with low noise and small impact. Compared with mechanical presses, hydraulic transmission is more stable, with less impact on molds and foundations, which helps to extend the service life of molds.

"We spent a lot of time in the commissioning stage of this horizontal hydraulic press, mainly matching the heating temperature and pressing speed. Now it is running smoothly, the hexagon bolt heads produced are very beautiful, and the inspection basically passes once," said the on-site operation team leader.

Quality inspection personnel regularly conduct sampling inspections on the hexagon bolts produced by the horizontal hydraulic press, including head hardness, dimensions and appearance. The results show that the key characteristic indicators of the products all meet customer requirements. During a recent factory inspection, customers also specially watched the actual production process of the horizontal hydraulic press and expressed recognition for the forming effect.

The company’s technical person in charge said that the successful commissioning of the horizontal hydraulic press has enriched the hot forging process methods of the company’s hexagon bolts. For some orders with high requirements on head symmetry, the horizontal hydraulic press can provide more reliable forming guarantee. Next, the team will continue to optimize the pressing speed and pressure holding time of the hydraulic system to further improve production efficiency.

The put-into-use of the horizontal hydraulic press in the hot forging production of hexagon bolts marks another pragmatic step for the company in the application of fastener forging equipment. The stable and efficient horizontal hydraulic press will operate in coordination with the existing production line to provide customers with more diversified and reliable bolt products. The technical person in charge introduced that according to different material specifications and conveying distances, the company has selected conveyor chains of different materials and structures, including high-temperature resistant chains, chains with baffles and wear-resistant coated chains, to ensure long-term reliable operation in the high-temperature environment of hot forging. In addition, the lubrication and tensioning mechanisms of the conveyor chain are also designed with convenient maintenance interfaces for daily inspection.

In the future, with the advancement of more automation transformation projects, the conveyor chain will be further integrated with manipulators, vision systems, etc., to realize more intelligent material scheduling and shunting. However, no matter how the technology upgrades, the basic role of the conveyor chain as the "artery of the production line" will never change. Its natural cooling function during transportation is also a simple and practical additional value.