TW506864B - Method of cold forging eccentric shaft free from shearing failures - Google Patents

Abstract

This invention is related to a method of cold forging eccentric shaft free from shearing failures, comprising the procedures of: (1) retaining a rod material; (2) applying forces to opposing ends of the rod; (3) fabricating the rod into a final product. By adopting the above three procedures, not only can the problems of insufficient shearing strength of conventional eccentric shafts be eliminated, but this invention is indeed also providing to a method of cold forging eccentric shafts free from shearing failures.

Description

506864 V. Description of the invention (1) The car is cold forged by the cold forging method. The present invention relates to a method that is not damaged by shear force. More specifically, it refers to a way that can quickly and save materials. An eccentric shaft made of eccentric shaft, and the finished product will not be damaged by shear force. In the past, many eccentric parts were used in precision mechanisms. The conventional eccentric shaft manufacturing technology has been used for a long time. Until now, no innovative manufacturing technology with better effects has appeared. The currently used manufacturing methods are as follows. Species. Please refer to the first and the first common partial 10), 1 1) and the industry. Because the cutting method of the Chinese Association will be wasteful; Second, because the car is easy to wear away, Third, the custom bar and mandrel manufacturing method shown in the car drawing is adopted and the bar (1 0 eccentric shaft (1 2) • This can take a long time, and can also cause problems: Turning the eccentric shaft (1 1 Many rods are dropped (10 Bars with excessive cost) (10-bed eccentric lathes are turned into whole rods (1 0) materials, will also produce production costs, the eccentric shaft (1 1) and the schematic diagram of the comparison before and after the work, the lathe eccentric turning the entire root) the two ends of the eccentric shaft used to manufacture the eccentric shaft manufacturers with sufficient strength respectively) and Eccentric shaft (1 2)), therefore, this kind of eccentric) material causes the disadvantages of turning tools when producing finished products (1 0);

Page 4 V. Description of the invention (2) The process is not only time-consuming and labor-intensive for cutting, so it is often used for car celebration, and it will take too much time. The practical and practical method still has a lot of processing time; the goal. This is indeed a pole ;: Question 'In the pursuit of scientific and technological efforts to improve and improve the success, the use of eccentric shaft manufacturing method is adopted, and the conventional forged eccentric vehicle manufacturing square ^ before and after the clothing processing schematic diagram, method, Not only during processing ^ ^ If high-speed high-speed forging of eccentric shafts needs to be cut off many rods, and shrinkage, and because this conventional technology is not available, shortening the processing time ^: This manufacturing method has material savings < Although the formula is also in Weishuang 1 ^, this customary high-pressure fast forging eccentric shaft resolves the subject: ,, using bee for a long time, but there will still be a number of 5 that have not been able to solve one of the 5th from the first end of the bar; It can be known that in the conventional forging process, the shear stress in the conventional forging process will be the relative shear stress of the bar = 11 pressure, and the two opposite shear lines (丄 4) between the thousands of grains (1 3). The strength and resistance of the damaging grain product (14) will seriously affect the eccentric shaft; the state will not reduce the overall quality of the eccentric shaft product damage: crystal = dagger, the middle grain of the bar ( 1 3) There will be H4 in the produced and produced products. 'So here Conventional clothing: The inferior product with cracks (the grain tangent (14 & = & I _ plate · ,,, cracks) born at 1I 1σ midnight, but can be reduced to 0 immediately under the quality control Defective rate, but it produces too many bad inferior products (waste material

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Hidden in the eccentric shaft product, the life of the eccentric shaft after the structural fracture is short,) 'forms the increase of processing cost; Second, if the grain tangent (1 4) is internal', the stress concentration after a period of time Consequences', so the use of forging equipment forging method produces products with poor durability; one or four, please refer to the third figure, the conventional forging process needs to be sequentially forged by three types of molds a, b, c plus 2:妯 (η) I undergoes three positionings and three processings: plus: "It costs 80% of the cost of production and also causes the product price to remain high. In view of this, the inventor of this case has considered it carefully, and ▲ Manufacture of various eccentric shafts and related eccentric shafts. Sales f = expensive materials that are fast in processing and do not waste rods = preparation method, and the primary purpose of the cure t: is to provide-a kind of finished products without shear force After the guide is broken freely, the pressure on the shaft end of ri and the appropriate side shearing and inking will generate natural rigid tortuous deformation of the grains, avoiding the problem of insufficient degree. The consequence of the line can solve the past eccentric shaft strength. Secondary of this invention In the material - is not species-shear collapse without wasting a lot of broken bars of the bar material cutting expensive, more / month and no more prone to < dead of products, the present invention

V. Description of the invention (4) The knife saves expensive materials for bars. -Kind of re: the purpose is to provide-Kinds of tins in the production tool with a fast processing and manufacturing volume :: / to the present invention can be dared ^ number so the invention can quickly 2 binary ΐ 1 without cutting operation Time '. Rapid production and processing operations with high production efficiency method, package = May 丨 cold forging of an eccentric shaft that is not damaged by shear forces: The manufacturing steps of 歹 'are its characteristics, please refer to The fourth picture (inside; 1) & material position steps: positioning the two ends of the bar on the preset mold (2) the shaft end of the bar to apply pressure to Xiangyou, so that Xihan # = Hurd: Preset molds at the two ends of the bar produce natural rigid tortuosity :: ;; =: Those who produce the preset curvature in the middle section of the mold positioning bar; The middle section of the bar quickly and smoothly deforms into the axle Ii :, For the finished product step: after the second processing, it becomes the default eccentricity. In order to achieve the creation of this case, and other effects, I will list a better #, the technology used, the means are as follows: First, please refer to the drawings

The present invention provides a non-! ΗΓίΗ page 7 506864

: Cold forging of eccentric shaft with force destruction, and according to the following operation steps, preset one bar and two that cannot be eccentrically displaced (shown in (20th, (20) in the hair) lateral deformation (and Let the 3 1) 2) into (the mold of the present invention (move, and the '2) rod six, seven) two sides 4) starting from the section, the bar can be from 3 0) the bar (' and two 3) Add the pre-. 2 6) pressure step ... The front of the ('22) row of pressure-resistant zigzag deformation side (2 2 bar (2 0 (2 4) side smoothly formed 2 0) 2 2 5), (step 1 please refer to the secondary processing to become (4 0), please refer to the post state preset, and (30) pre) to guide the preset curved side (2 6). The eighth figure has Partially to the mold · (2 3) laterally ^ free ㈣ rod positioning step 2 0) two side ends 2 3), (another mold (the opposite end of the shaft is the same plus end (2 1) end Moving inwardly produces a natural rigidity (20)-due to sliding, it will be made by the middle of the mold 20) the bar (eccentric shaft piece (the second shaft piece finished product (21), 2 4) Within, 2 4) Preset side (pictured in Figures 6 and 7). The bar mold (2 3) makes the bar (2). At this time, the mold (2 4 natural rigidity is tortuously bent to the preset direction, the degree of bending ( 2 1), (2; as shown, then, the mandrel member (2 5 means that through the above-mentioned steps of the present invention, the rod (2 shank (2 3), (2 4) shaft end pressure is opposite Rear

Page 8 〇) After presetting ‘the bar (2 0

506864 V. Description of the invention (6)) The natural rigid zigzag deformation (30) is not subjected to shear stress, but the internal material of the bar (20) is subjected to shear bending by ^, so the material crystal of the present invention The pellets can prevent the bar T from generating tangent grains, and can also solve the problem of the strength of the eccentric shaft in the past. On the one hand, because the present invention does not need to cut many rods (A ^; Inferior product of tangent line, so U i material, bar material (20) expensive material. &Amp; β is very worth saving. It is worth mentioning that the shaft end is opposite to the pressure step. It is completed once and then the rapid production plus is, The preset mold (2 3) of the present invention does not have the process of Γ and = lead time! After the second benefit, after the U of the fewest summer production machine needs: after cutting time? &Amp; the present invention can > It is true that those who have relatively high production efficiency. Based on the above steps, (2) · The above-mentioned three shortcomings and problems of the bar material, so the cold forging method of the present invention; so doubt, in addition, the previous has not appeared in effect Increasing facts are in accordance with the law This hair shaft end applies a manufacturing step and can solve the various publications of the present invention, which is the most practical of the present invention. Therefore, the present invention proposes an invention that specifically describes the main pressing steps, not only a previously added embodiment with production examples. I have never said "the basis of the application of Xinli; (3) · Can dismantle the technology and not be exposed to the public to make it clear." Please pray ... (1) The structure of force destruction and utilization, plus "progress, please review the steps of positioning material; the eccentric axis of the various questions about the strength of the mandrel should be indispensable < functional in the application" have been checked Early

Page 9 506864 V. Description of the invention σ) Granting a quasi-patent, a real sense of virtue.

IHRI11 Page 10 506864 Brief description of the drawing Part of the drawing The first drawing is a comparison of before and after conventional bar turning. The second figure is a schematic diagram of the crystal phase after conventional forging. The third figure is a schematic diagram of the conventional forging process. The fourth figure is a flowchart of the steps of the present invention. The fifth figure is a diagram of the positioning steps of the bar of the present invention. The sixth figure is a diagram of the step of applying pressure to the shaft end of the bar of the present invention. The seventh figure is a side forming view of the bar of the present invention. The eighth figure is a perspective view after the completion of the present invention. Figure number part (1 1) eccentric shaft (13) grain (1 5) processing bar (b) mold (10) bar (1 2) eccentric shaft (1 4) grain tangent line (a) mold (c) ) Mould (2 1) Side end (2 3) Mould (2 5) Eccentric shaft piece (2 0) Bar (2 2) Side end (2 4) Mould (2 6) Eccentric shaft piece

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Claims (1)

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