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Manufacturing method for special-shaped fishplate and dies

A manufacturing method and fishplate technology, applied in the field of machinery, can solve the problems of poor density, environmental pollution, low yield, etc., and achieve the effects of improving production efficiency, reducing production costs, and stabilizing comprehensive performance.

Inactive Publication Date: 2016-05-04
SHANDONG YUANDA MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The production process of traditional special-shaped fishplate is casting. Due to the decision of the process, the internal structure density is relatively poor compared with rolling and forging, and it is inevitable to have defects such as pores, inclusions, shrinkage cavities, etc., and the yield is low, and it also causes environmental pollution. and other unfavorable factors
[0004] Recently, some manufacturers have tried to use ordinary fishplates (equal section) to roll blanks and carry out partial forging displacement to realize the manufacture of special-shaped fishplates. The problem brought about by this process is: after the secondary forging, due to the partial forging , the mechanical properties and structure of both ends of the product are not uniform, that is, one end is the mechanical properties and structure of rolling, and the other end is the mechanical properties and structure of forging, which has potential safety hazards; at the same time, because it is secondary forging, adding a heating process, There is also an increased waste of resources, energy and manpower

Method used

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  • Manufacturing method for special-shaped fishplate and dies
  • Manufacturing method for special-shaped fishplate and dies
  • Manufacturing method for special-shaped fishplate and dies

Examples

Experimental program
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Effect test

Embodiment 1

[0035] like figure 1 As shown, the present invention provides a special-shaped fishplate forging die, including an upper die 1-1 and a lower die 1-2, wherein a mold is arranged between the upper die 1-1 and the lower die 1-2. A cavity 1-3, the cavity 1-3 is provided with an insert core 1-4, and the insert core 1-4 is respectively fixed with the upper mold 1-1 or the lower mold 1-2 by wedge iron 1-5 Connected, the upper mold 1-1 and the lower mold 1-2 are provided with locks that cooperate with each other, so as to be more fastened when the molds are closed.

[0036] In yet another embodiment, the in-cavity draft angle of the insert core 1-4 is 4.8-5.3 degrees, and the out-cavity draft angle is 2.7-3.3 degrees. Both the bridge portion and the flash bin are made by known techniques.

[0037] In yet another embodiment, the upper and lower mold bases are made of ordinary hot work die steel (such as 5CrNiMo), and the insert core is made of high-end hot work die steel (such as H13...

Embodiment 2

[0039] like figure 2 As shown, the present invention provides a composite mold for punching, trimming, and leveling a special-shaped fishplate, including an upper mold part 2-1 and a lower mold part 2-2, wherein,

[0040] The upper mold part 2-1 includes an upper template 2-101 and a punch 2-102, and the punch 2-102 is connected to the middle of the upper template 2-101;

[0041] The lower mold part 2-2 includes a base 2-201, a support plate 2-202, a support block 2-203, a die 2-204, a supporting plate 2-205, a backing plate 2-206 and an ejector 2-207 , above the base 2-201 are provided with two symmetrical support plates 2-202, between the two support plates 2-202 are provided two support blocks 2-203, above the support blocks 2-203 are connected Die 2-204; the die 2-204 corresponds to the punch 2-102 and is located in the middle of the lower die part 2-2; a supporting plate 2-205 is provided below the die 2-204 and a backing plate 2-206, the upper plane of the supporting ...

Embodiment 3

[0045] To manufacture 136RE-115RE high-strength special-shaped fishplates for export to North America, first process the forging die and punching, trimming and leveling compound die of this model;

[0046] (1) Raw material cutting:

[0047] According to the specifications, it is preferable to use 55# round steel Φ70mm, calculate the required round steel blanking weight of 33kg, and transfer to the next step for use;

[0048] (2) Intermediate frequency heating:

[0049] Put the above-mentioned raw materials into the intermediate frequency induction heating furnace for heating, set the heating temperature of the blank to 1180 ° C, and the heating cycle of a single piece is 4 minutes;

[0050] (3) Die forging:

[0051] First, install the prepared forging die on an 8-ton die forging hammer, and preheat the forging die evenly to 300 °C in advance; the mold cavity is evenly sprayed with graphite milk that is easy to demould, and the heated material is placed in the place. The for...

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Abstract

The invention provides a manufacturing method for a special-shaped fishplate and dies. The special-shaped fishplate forging die and the special-shaped fishplate punching, trimming and leveling composite die are adopted; blanked raw materials are made into a forging stock; then punching, trimming and leveling are conducted, heat treatment is conducted, and after-treatment is conducted; and the high-strength special-shaped fishplate is obtained. The dies are adopted so that the work of punching, trimming and leveling can be achieved on one station, and the defects of an existing casting technology and secondary displacement forging are overcome. The special-shaped fishplate manufactured through the method has higher and more stable comprehensive performance, meanwhile, production cost is reduced, production efficiency is improved, and the very important significance is achieved in the technical field of railways and the die forging technology.

Description

technical field [0001] The invention relates to the field of machinery, in particular to a method for manufacturing a special-shaped fishplate and a mold. Background technique [0002] The special-shaped fishplate is a key component of the railway track system. It is used in the joints of non-same rail type rails. It has a large amount of use and many specifications, but its basic structure and use principle are the same, only due to the adjustment of different rail types. Its dimensions, its structural form such as figure 1 shown. Due to the particularity of its use position, it is related to the safety of train operation, which puts forward higher technical requirements for this product, that is, it has better mechanical properties (not lower than the connected rails), such as good resistance Impact, shear resistance, wear resistance, etc. [0003] The production process of traditional special-shaped fishplate is casting. Due to the decision of the process, the internal...

Claims

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Application Information

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IPC IPC(8): B21J13/02B21D37/10B21K7/10
CPCB21D37/10B21J13/02B21K7/10
Inventor 曹衍学王波顾正李振
Owner SHANDONG YUANDA MATERIAL TECH CO LTD
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