All-fiber die forging method for titanium alloy reducing pipe

Abstract

The invention relates to the technical field of die forging, in particular to a titanium alloy reducing pipe all-fiber die forging method. A titanium alloy reducing pipe all-fiber die forging method comprises a titanium alloy reducing pipe and a reducing pipe die, and is characterized in that the specific die forging method comprises the following steps that S1, the titanium alloy reducing pipe conforming to the process size is placed into the special reducing pipe die; s2, performing an upsetting process; s3, after upsetting is completed, a punching process is carried out; s4, after punching is completed, a broaching process is carried out; and S5, after broaching is completed, an integrally-formed forge piece is forged. Compared with the prior art, the all-fiber die forging method for the titanium alloy reducing pipe is provided, a precision die forging integrated forming mode is adopted for forging, the performance is improved by changing the forging mode and reserving the whole metal streamline, and the strength of the titanium alloy reducing pipe is improved in the forging process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of die forging, in particular to a full-fiber die forging method for titanium alloy reducing pipe. BACKGROUND

[0002] TC4 material has high specific strength (light and high strength), good corrosion resistance, low forging temperature (about 900 DEG C ~ 970 DEG C), high strength, high hardness and poor thermal conductivity, so the die forging of TC4 material is difficult.

[0003] At present, rectangular cross-section ring material is welded, and after welding, it is spliced with two end flanges, and there are hidden dangers in the welding position, and the welding difficulty is high, and the processing cycle is long; and the machining method is used to build, which has the problems of large machining allowance, long building cycle, low material utilization rate and high comprehensive cost. SUMMARY

[0004] In order to overcome the defects of the prior art, a full-fiber die forging method for titanium alloy reducing pipe is provided, which is forged by precise die forging integrated molding, the performance is improved by changing the forging method and retaining the metal whole streamline, and the strength of the titanium alloy reducing pipe is increased in the forging process.

[0005] In order to achieve the above purpose, a full-fiber die forging method for titanium alloy reducing pipe is designed, which comprises a titanium alloy reducing pipe and a reducing pipe die, characterized in that the specific die forging method is as follows: S1, the titanium alloy reducing pipe meeting the process size is put into the special reducing pipe die; S2, upsetting process is carried out; S3, after upsetting is completed, punching process is carried out; S4, after punching is completed, hole expanding process is carried out; S5, after hole expanding is completed, an integrated molding forging piece is forged.

[0006] The blank of the titanium alloy reducing pipe is a round bar.

[0007] The reducing pipe die comprises a pad, a die sleeve, a die core one, a die core two, a die core three and a punch, the pad and the die sleeve are in a hollow cylindrical structure, the die core one, the die core two and the die core three are embedded in the die sleeve from bottom to top, the inner surfaces of the die core one, the die core two and the die core three form a reducing cavity, the punch is located in the reducing cavity, the pad is embedded at the bottom of the die core one, and the lower part of the die sleeve is provided with a groove.

[0008] The die core one, the die core two and the die core three are an integral structure.

[0009] The structure of the punch is a reducing structure.

[0010] Based on the shape and size of the reducing pipe forging, the reducing pipe mold adopts a vertical parting method.

[0011] Compared with the prior art, the present invention provides a full fiber die forging method for titanium alloy reducers, which adopts a precision die forging integral forming method. By changing the forging method, the overall flow lines of the metal are preserved to improve performance and increase the strength of the titanium alloy reducer during the forging process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the shape of the billet after upsetting in the process of this invention.

[0013] Figure 2 This is a schematic diagram of the shape after punching in the process of this invention.

[0014] Figure 3 This is a schematic diagram of the shape after hole enlargement in the process of this invention.

[0015] Figure 4 This is a schematic diagram of the original process shape in the process of this invention.

[0016] Figure 5 This is a schematic diagram of the reducer mold structure in this invention. Detailed Implementation

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] like Figures 1 to 5 As shown, a method for forging a titanium alloy reducer using full fiber die includes a titanium alloy reducer and a reducer die. The specific forging method is as follows: S1, Place the titanium alloy reducer that meets the process dimensions into a special reducer mold; S2, proceed with the upsetting process; S3, After upsetting, punching process is performed; S4, After punching, perform hole reaming process; S5, after the hole is expanded, is forged into an integral forging.

[0019] The blank for titanium alloy reducers is a round bar.

[0020] The reducing pipe mold includes a pad, a mold sleeve, a mold core 1, a mold core 2, a mold core 3, and a punch. The pad 1 and the mold sleeve 2 are hollow cylindrical structures. The mold sleeve 2 is fitted with mold core 1 3, mold core 2 4, and mold core 3 5 from bottom to top. The inner surfaces of mold core 1 3, mold core 2 4, and mold core 3 5 form reducing cavities. The punch 6 is located in the reducing cavity. The pad 1 is embedded at the bottom of mold core 1 3. The mold sleeve 2 has a groove at the bottom.

[0021] Mold core 1 (3), mold core 2 (4), and mold core 3 (5) form a single integrated structure.

[0022] The structure of the punch 6 is a reducer type structure.

[0023] According to the shape and size of the reducer pipe forging, the mold adopts a vertical parting mode.

[0024] The reducer pipe mold for multi-directional forging is usually complex in structure, as it needs to adapt to the forging pressure in multiple directions. The reducer pipe mold is composed of a mold core, a mold sleeve, a punch, and a cushion block, etc. Accurate cooperation between each part is required to ensure the accuracy and quality of the forging.

[0025] According to the shape and size of the reducer pipe forging, the mold design can adopt a vertical parting mode. The appropriate parting mode is very important for ensuring smooth ejection of the forging and improving the service life of the mold.

[0026] The extrusion punch is a key component in the multi-directional forging mold, which directly extrudes the titanium alloy billet to form the required shape. The extrusion punch is designed according to the size of the forging.

[0027] Since multi-directional precision forging requires high precision and high wear resistance, high-performance mold materials and advanced processing techniques should be considered in mold design to improve the precision and wear resistance of the mold.

[0028] In order to ensure that the mold maintains good working condition during long-term use, an effective cooling and lubrication system needs to be designed. This helps to reduce the temperature of the mold, reduce wear and improve the quality of the forging.

[0029] The production of titanium alloy reducer pipes uses round bars as raw materials, which can be directly punched and expanded by using special mold forging. The forging is a reducer pipe, which cannot be achieved by using traditional ring rolling process.

[0030] The method has the following advantages: 1. Shortening of processing cycle: more than two months of welding and machining time can be saved.

[0031] 2. The existing technology uses plate and ring materials for welding, which can save 4-5 tons of raw materials, greatly improving the material utilization rate. The weight of the two specifications of reducer pipe ring material is 5517kg / 2125kg, and the weight of the mold forging is reduced to 2430kg / 900kg, with a material utilization rate of 46% and 35%.

[0032] 3. Enhanced tensile strength: along the metal flow line (longitudinal direction), the tensile strength of the metal material is usually higher. This is because the flow line organization is continuously distributed, and when it is consistent with the stress direction, it can more effectively resist tensile load.

[0033] 4. No weld heat affected zone, reducing the possibility of subsequent material failure, regarding the problem of heat affected zone, residual stress will be formed inside the material after the temperature of the area decreases, thus reducing the strength of the whole structure, and the non-welding effectively avoids such defects.

[0034] 5. Since there is no connection point or weld joint, the integrally formed product has better corrosion resistance. This feature is particularly important in harsh conditions such as marine environment or chemical industry.

[0035] The present application is mainly in the aspect of multi-directional die forging, and titanium alloy forgings have not been manufactured by using this method before. By changing the forging method, the performance is improved by retaining the overall metal streamline, and the strength of the titanium alloy reducer is increased during the forging process, rather than using other subsequent electroplating methods to strengthen the product performance.

Claims

1. A method for forging a titanium alloy reducer using all-fiber die, comprising a titanium alloy reducer and a reducer die, characterized in that: The specific forging method is as follows: S1, Place the titanium alloy reducer that meets the process dimensions into a special reducer mold; S2, proceed with the upsetting process; S3, After upsetting, punching process is performed; S4, After punching, perform hole reaming process; S5, after the hole is expanded, is forged into an integral forging.

2. The method for all-fiber die forging of a titanium alloy reducer according to claim 1, characterized in that: The blank for the titanium alloy reducer is a round bar.

3. The method for all-fiber die forging of a titanium alloy reducer according to claim 1, characterized in that: The reducing pipe mold includes a pad, a mold sleeve, a mold core 1, a mold core 2, a mold core 3, and a punch. The pad (1) and the mold sleeve (2) are hollow cylindrical structures. The mold sleeve (2) is embedded with mold core 1 (3), mold core 2 (4), and mold core 3 (5) from bottom to top. The inner surfaces of mold core 1 (3), mold core 2 (4), and mold core 3 (5) form reducing cavities. The punch (6) is located in the reducing cavity. The pad (1) is embedded at the bottom of mold core 1 (3). The mold sleeve (2) has a groove at the bottom.

4. The method for all-fiber die forging of a titanium alloy reducer according to claim 3, characterized in that: The mold core one (3), mold core two (4), and mold core three (5) are an integral structure.

5. The method for all-fiber die forging of a titanium alloy reducer according to claim 1, characterized in that: The punch (6) has a variable diameter structure.

6. The method for all-fiber die forging of a titanium alloy reducer according to claim 1, characterized in that: Based on the shape and size of the reducing pipe forging, the reducing pipe mold adopts a vertical parting method.

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