Cold-Forged Hitch Ball Head With Reduced Material Waste
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Solution Overview
Problem
The traditional hot forging process for manufacturing hitch ball heads results in significant material waste, accounting for about 40% of the total material, leading to increased costs and inefficiencies.
Innovation Solution
A method involving a series of cold forging steps, including pre-forging, first and second forging, forming, and final forming steps, which eliminates the need for subsequent cutting and polishing, thereby reducing material waste and improving material utilization through a process that maintains the hitch ball head's structural integrity without heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hot forging process is used to manufacture hitch ball head, then the hitch ball head can be formed with high strength, but material waste accounts for about 40% of total material
Solution Approach 1:
The method performs preliminary forming operations (pre-forging, first forging, second forging) to gradually shape the blank into the final hitch ball head geometry before final forming. This preliminary action allows the material to be progressively shaped into the exact final form, eliminating the need for subsequent cutting and polishing that would generate waste, while maintaining the high strength properties through cold working
Solution Approach 2:
The invention changes the temperature parameter from hot forging to cold forming operations. By performing all forming steps at room temperature, the material is shaped into the final hitch ball head geometry without heating, eliminating the need for post-forming cutting and polishing operations that generate 40% material waste, while the cold working process actually enhances strength through work hardening
2Ease of manufacture
If hot forging process with heating is used, then the hitch ball head can be formed, but the manufacturing process becomes complex and time-consuming
Solution Approach 1:
The invention merges multiple separate operations (heating, forming, cutting, polishing) into a single integrated cold forming process. All forming steps (pre-forging, first forging, second forging, first forming, second forming) are performed sequentially at room temperature, eliminating the need for separate heating and post-processing operations, thereby simplifying the manufacturing process and reducing total cycle time
Solution Approach 2:
The invention extracts and eliminates the heating step from the traditional hot forging process. By performing all forming operations at room temperature, the complex thermal management requirements (heating, maintaining temperature, cooling) are removed, simplifying the manufacturing process while the cold working mechanism ensures the hitch ball head is formed with the required precision without subsequent polishing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method significantly reduces material waste, enhances the yield rate of hitch ball heads, and simplifies the manufacturing process by eliminating the need for heating, thus improving the overall efficiency and cost-effectiveness of the production.
Implementation Method 1
a first forging step, in which the pre-forged blank is extruded and drawn to form a first forged portion, and a second forged portion connected to the first forged portion
Implementation Method 2
a first forming step, in which the pre-forged blank is extruded to form the first forged portion into a ball head portion and to form the columnar base section into a connecting segment
Data Source
AI summary
A method for forming a hitch ball head includes a pre-forging step, in which a columnar blank is prepared and is extruded to form a pre-forged blank; a first forging step, in which the pre-forged blank is extruded and drawn to form first and second forged portions; a second forging step, in which the pre-forged blank is extruded and drawn to shorten a length of the first forged portion and to form the second forged portion into a to-be-formed section and a columnar base section; a first forming step, in which the pre-forged blank is extruded to form the first forged portion into a ball head portion and to form the columnar base section into a connecting segment and a columnar segment; and a second forming step, in which the pre-forged blank is extruded to form the to-be-formed section into a seat section to thereby obtain the hitch ball head.