TWI281445B - Manufacturing method of trailer ball and structure thereof - Google Patents

Abstract

The present invention provides a manufacturing method of trailer ball and structure thereof, which includes a blanking process, a spheroidizing process, a forge-forming process, a surface treatment process, a product finishing process to complete the manufacture of the trailer ball. As the present invention employs a cold forging, it is unnecessary for an operator to work under exposure to high temperature for a long period of time and a better working efficiency can be secured; moreover, the forged blank has no issue of thermal expansion and cold contraction, and a better dimension precision can be acquired; meanwhile, no flash will be generated around edge while a blank is forged, and simple manufacturing processes further effectively reduce production time, cost and labor, and in other word, the competitive edge of the product is relatively promoted, thereby addressing an invention having industrial utility and progressiveness.

Description

1281445 is made up of several kinds of processing. It can not only report the rapid processing in the process of manufacturing, but also save a lot of time and material cost. The processing technology of each program is billet, spheroidizing, forging and Surface processing, and finally complete the finished product in five steps. When discussing the following process steps, please refer to the second and fourth figures. The above steps are described as follows: "I" blank: Prepare the blank 10 The blank 10 of the appropriate size can be first cut by the cutter. In the first embodiment, the material of the blank 10 is made of low carbon steel. Spheroidizing treatment of "Π": At this stage, the billet 10 is first heat-treated, so that the billet 10 can precipitate spheroidal graphite, so that when the billet is cold forged, it is less likely to be broken or broken. Reduce the defective rate of forged products. "Π" forging and forming: This step is also forged by the spheroidized round bar-shaped blank 1Q, first forging the spherical head 21, then forging the disc-shaped shoulder 22 and non-circular The limit portion 23 is also referred to the fifth figure. It is to be noted that the two ends of the forging forming portion 23 are respectively formed with a solid surface 231, and the limiting portion 23 is formed to be non-circular. "IV" surface processing: In this stage, the forged and formed tow 2 tails 24 are turned and threaded, and polished, plated, etc., to obtain a better surface. "V" finished product:

Claims (1)

1281445 .more) X. Application for patent scope: The manufacturing method of the blank material ball includes the following steps: belly shake • the appropriate size of the blank material; chemical treatment: the raw material is hot ink, so that the shelter is carried out, _ Wei# Turn out the globular stone you ^, 仃 give the day inch, not easy to break or rupture; 1 stem molding: the spheroidized processing of the billet head, shoulder and tail molding; material 仃 (four) 'to make the trailer ball Machining surface processing: At this stage, the towed ball after the forging is subjected to the surface to make the method of manufacturing the tow tree described in the first item, and the material of the crucible is applied as a low carbon steel. In the method for manufacturing the tow ball according to Item 1 of the forging, the '^ 1 11 white^ can forge the lower edge of the shoulder out of a limiting portion, and one end of the limiting leg is formed with a fastening surface. The limit portion is formed into a #circular shape. 4. The method of manufacturing a tow ball as described in claim 1 of the patent application, wherein the tail of the tow ball can be threaded in the surface processing stage. 5. The method of manufacturing the tow ball according to claim 1 of the patent application scope , t; surface processing stage can be used to polish the tow ball, electric mine Menglin '> get the better surface. 6. The method of manufacturing a tow ball according to claim 1, wherein the head of the sea is formed into a spherical shape. The manufacturing method of the tow ball described in claim 1, wherein the shoulder is formed in a disk shape. 10 1281445 VII. Designated representative map: (1) The representative representative of the case is: the third picture. (2) A brief description of the symbol of the representative figure: 8. If there is a chemical formula in this case, please disclose the chemical formula which best shows the characteristics of the invention. 9. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a tow ball, in particular Refers to a method of manufacturing a trailer ball system using cold forging. [Prior Art] With the development and advancement of science and technology, people's demands for things have become quite delicate and demanding from the old thinking of being able to use them. Only the concept of continuous improvement or innovation has produced new ones. In order to improve the added value of products, the brigade can effectively reduce costs and survive in the fierce market competition. The first picture of the tea photo shows the manufacturing process of using the hot forging tow ball. The manufacturing process of the tow ball is the process of blanking, heating, forging and shaping two surface processing, and finally the finished product is completed in six steps. 'Rather, the hot forging trailer surface to make the financial towel, must first avoid the heating and then forging: and the hot forged trailer material finished stalk cooling, due to the impact of the sturdy thing 'the precision of the work size is not # control, So need to go through the whole