Die for producing extrusion part of titanium alloy blade of gas compressor and production method of extrusion part

Abstract

The invention discloses a die for producing an extrusion part of a titanium alloy blade of a gas compressor and a production method of the die, the die is a female die, a stamping hole is formed in the die, the stamping hole penetrates through the whole die, the stamping hole is used for placing a blanking part, and the stamping hole comprises a punch containing hole, a blade tenon transition hole and a blade body containing hole which are sequentially and coaxially arranged and sequentially communicated; according to the method, only one set of die is needed, so that the blank making mode is lower in cost and lower in machining difficulty, while the blank making mode of'extrusion and heading 'in the prior art needs two sets of dies, so that compared with the prior art, the cost is low, and the difficulty is low.

Description

Technical Field

[0001] The invention belongs to the field of blade precision forging, and in particular relates to a die for producing extruded parts of compressor titanium alloy blades and a production method thereof. Background Art

[0002] With the popularization of precision forging technology for aerospace engine blades, the market has put forward higher requirements for its economy and delivery cycle. The blank quality of compressor blades directly affects its final quality, especially the size and appearance quality. This is especially true for the production and delivery process of small precision forged blades.

[0003] In the prior art, the blank making technology is mainly realized through the extrusion + pier head forming technology for the final forging forming stage, and its process route is: cutting → surface cleaning → glass coating → heated extrusion → (cleaning surface → glass coating) → heated pier head; therefore, the prior art has a large number of molds, high processing costs, a long production process, and a long manufacturing cycle, which has a bad impact on the customer's delivery experience. Summary of the invention

[0004] The purpose of the present invention is to provide a die and a production method for producing extruded parts of compressor titanium alloy blades, so as to solve the problems of high blank making cost, large number of dies and long production process of extruded parts of compressor titanium alloy blades.

[0005] The present invention adopts the following technical scheme: a die for producing an extruded part of a compressor titanium alloy blade, the die is a female die, a punching hole is opened on the die, the punching hole runs through the entire die setting, the punching hole is used to place a blanking part, the punching hole includes a punch receiving hole, a blade tenon transition hole, and a blade body receiving hole which are coaxially arranged and connected in sequence; the punch receiving hole is cylindrical, and is used for the punch to enter from top to bottom to punch the blanking part, so that the blanking part is extruded downward along the blade tenon transition hole and the blade body receiving hole, and an extruded part is formed under the constraint of the blade tenon transition hole and the blade body receiving hole;

[0006] The upper opening diameter of the punch receiving hole is larger than the lower opening diameter;

[0007] The diameter of the blade tenon transition hole is continuously reduced from the punch receiving hole to the blade body receiving hole, and the upper end opening diameter is the same as the lower end opening diameter of the punch receiving hole, and the lower end opening diameter is the same as the upper end opening diameter of the blade body receiving hole;

[0008] The blade body receiving hole is cylindrical;

[0009] The height of the punch accommodating hole: the height of the blade tenon transition hole: the height of the blade body accommodating hole is equal to 3:1:1.

[0010] A method for determining die parameters for producing an extruded part of a compressor titanium alloy blade comprises:

[0011] Step 101: according to the three-dimensional model parameters of the finished blade, uniform margins are added to other positions of the tenon and other positions of the blade except the inner edge plate of the tenon and the normal direction of the blade body, so as to obtain the three-dimensional model parameters of the finished blade forging;

[0012] Step 102: obtaining the three-dimensional model parameters of the extruded part according to the three-dimensional model parameters of the finished blade forging part;

[0013] Step 103: Utilizing 3D software to obtain specific parameters of the punching holes of the required mold according to the 3D model parameters of the extruded part and the thermal expansion coefficient of the raw material.

[0014] A method for producing an extruded part of a compressor titanium alloy blade, comprising:

[0015] Step 201: Calculating the volume of the extruded part using 3D software according to the 3D model parameters of the extruded part;

[0016] Step 202: Calculate the diameter of the blank by comparing the diameter of the tenon of the extruded part with a preset value;

[0017] Step 203: Calculate the height of the blanking piece using the diameter of the blanking piece and the volume of the extruded piece;

[0018] Step 204: Select the blank according to its height and diameter, and perform finishing on it;

[0019] Step 205: spraying the finished blank;

[0020] Step 206: using a mold and a punch to extrude the sprayed blank to obtain an extruded part;

[0021] Step 207: Shot peening and pickling of the extruded part;

[0022] The mold in step 206 is the mold of claim 1 or a mold having the mold parameters of claim 2.

[0023] Furthermore, the blanking piece is a columnar piece, and the center position of one end thereof protrudes outward to form a positioning column. The positioning column is used to extend into the blade tenon transition hole when other parts of the blanking piece are located in the punch accommodating hole, so that when the punch squeezes the blanking piece, the blanking piece moves downward as a whole, and the positioning column moves upward relative to the punch until it fills the punch accommodating hole and then continues to move downward; the other end of the blanking piece is squeezed into the blade body accommodating hole, which is convenient for the punch to squeeze.

[0024] Furthermore, the polishing time in step 204 is 4 hours, and the drying time after polishing is 45 minutes.

[0025] Furthermore, in step 205, the blank is preheated to 90-110°C before spraying; the spraying thickness is 0.025-0.035mm.

[0026] Furthermore, in step 206, the blank is heated before extrusion, the heating temperature is 950°C ± 10°C, the heating time is 6 to 10 minutes, and the extrusion speed is 16 to 25 rpm.

[0027] Furthermore, during extrusion in step 206, the temperature of the mold is 180°C to 230°C.

[0028] Furthermore, in step 206, the extrusion is completed within 5 seconds after the heating of the blank is completed.

[0029] Furthermore, the shot peening time in step 207 is 45-60 minutes.

[0030] The beneficial effects of the present invention are:

[0031] The present invention only needs one set of molds, so the blank making method of the present invention has lower cost and less processing difficulty, while the blank making method of the prior art "extrusion + upsetting" requires two sets of molds, so compared with the prior art, the cost is lower and the difficulty is less;

[0032] The present invention not only saves a whole set of molds, but also saves the upsetting process corresponding to the mold, reduces the number of heating times, and because the extrusion process is a three-dimensional compressive stress deformation process, it can effectively prevent defects such as cracking caused by poor plasticity of the material, thereby improving the pass rate of finished products;

[0033] The material utilization rate of the present invention is high. Since the diameter dimensions of the parts except the length dimension are all determined by the mold dimension, the dimensional accuracy is high, which provides a greater guarantee for the subsequent process and can also reduce the waste of raw materials.

[0034] The present invention reduces the upsetting process, reduces the auxiliary processes between extrusion and upsetting, and also reduces the turnover time of parts in the production process, reduces the difficulty of production management, and shortens the entire production cycle of parts;

[0035] The blank making process route of the present invention is: blanking → surface cleaning → glass coating → heating and extrusion. Considering that the processing difficulty of a general pier head mold is greater than that of an extrusion mold, compared with the prior art, the number of molds, processing costs, production process management costs, time costs, and intermediate cleaning process costs of the present invention are more than half less than those of the prior art, thereby shortening the manufacturing cycle;

[0036] The present invention utilizes the extrusion process to simultaneously complete the forming of the blade body stem of the forging and the one-time forming of the tenon part and the tenon positioning boss part. The design structure is simple, the deformation process is simple, the design and operation are easy, and the part size is accurate, which is of great benefit to improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of the finished blade of the present invention;

[0038] Figure 2 It is a schematic structural diagram of the finished blade forging of the present invention;

[0039] Figure 3 is a cross-sectional view of the mold of the present invention;

[0040] Figure 4 It is a structural schematic diagram of the blanking part of the present invention;

[0041] Figure 5 It is a schematic diagram of the structure of the extrusion part of the present invention;

[0042] Figure 6 It is a schematic diagram of the structure of the extrusion part of the present invention;

[0043] Figure 7 It is a structural schematic diagram of the extrusion process of the present invention;

[0044] Figure 8 It is a schematic structural diagram of the punch of the present invention.

[0045] Among them: 10, punch receiving hole; 11, blade tenon transition hole; 12, blade body receiving hole. DETAILED DESCRIPTION

[0046] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. The "direction" in the present invention is based on the position of the present invention in a certain direction. Figure 1 Description of the trend in the state.

[0048] The present invention discloses a die for producing an extruded part of a compressor titanium alloy blade, such as Figure 3 As shown, the mold is a female mold, and a punching hole is opened on the mold. The punching hole runs through the entire mold setting, and the punching hole is used to place the blanking parts. The punching holes include a punch accommodating hole 10, a blade tenon transition hole 11, and a blade body accommodating hole 12 which are coaxially arranged and connected in sequence; the punch accommodating hole 10 is cylindrical and is used for the punch to enter from top to bottom to punch the blanking parts, so that the blanking parts are extruded downward along the blade tenon transition hole 11 and the blade body accommodating hole 12, and an extruded part is formed under the constraints of the blade tenon transition hole 11 and the blade body accommodating hole 12.

[0049] The upper opening diameter of the punch accommodating hole 10 is larger than the lower opening diameter; the diameter of the blade tenon transition hole 11 continuously decreases from the punch accommodating hole 10 to the blade body accommodating hole 12, and its upper opening diameter is the same as the lower opening diameter of the punch accommodating hole 10, and its lower opening diameter is the same as the upper opening diameter of the blade body accommodating hole 12; the blade body accommodating hole 12 is cylindrical; the height of the punch accommodating hole 10: the height of the blade tenon transition hole 11: the height of the blade body accommodating hole 12 is equal to 3:1:1.

[0050] The present invention also discloses a method for determining die parameters for producing extruded parts of compressor titanium alloy blades, comprising:

[0051] Step 101: Based on the three-dimensional model parameters of the finished blade, Figure 1 As shown in FIG. 1 , except for the inner edge plate of the tenon and the normal direction of the blade body, uniform margins are added to other positions of the tenon and other positions of the blade to obtain the three-dimensional model parameters of the finished blade forging; as shown in FIG. Figure 2 shown.

[0052] Step 102: obtaining the three-dimensional model parameters of the extruded part according to the three-dimensional model parameters of the finished blade forging part;

[0053] Step 103: Utilizing 3D software to obtain specific parameters of the punching holes of the required mold according to the 3D model parameters of the extruded part and the thermal expansion coefficient of the raw material.

[0054] The present invention also discloses a method for producing an extruded part of a compressor titanium alloy blade, comprising:

[0055] Step 201: Calculating the volume of the extruded part using 3D software according to the 3D model parameters of the extruded part;

[0056] Step 202: Calculate the diameter of the blank by comparing the diameter of the tenon of the extruded part with a preset value;

[0057] Step 203: Calculate the height of the blanking piece using the diameter of the blanking piece and the volume of the extruded piece;

[0058] Step 204: Select the blank according to its height and diameter, and perform finishing on it; Figure 4 As shown,

[0059] Step 205: spraying the finished blank;

[0060] Step 206: Figure 7 As shown, the sprayed blank is extruded using a die and a punch to obtain an extruded part; Figure 5 and 6 As shown;

[0061] Step 207: Shot peening and pickling of the extruded part;

[0062] The mold in step 206 is the mold of claim 1 or a mold having the mold parameters of claim 2.

[0063] Among them, Figure 8 As shown, a recess is provided on the punch of the punching machine from bottom to top, and the recess is used for the blank to extend upward into the recess during the process of being squeezed by the punch, thereby making the tenon position of the blade bulge outward, which is convenient for later processing.

[0064] Among them, the blanking piece is a columnar piece, and the center position of one end thereof protrudes outward to form a positioning column. The positioning column is used when other parts of the blanking piece are located in the punch accommodating hole 10. The positioning column extends into the blade tenon transition hole 11, so that when the punch squeezes the blanking piece, the blanking piece moves downward as a whole, and the positioning column moves upward relative to the punch until it fills the punch accommodating hole 10 and then continues to move downward; the other end of the blanking piece is squeezed into the blade body accommodating hole 12, which is convenient for the punch to squeeze.

[0065] Among them, the polishing time in step 204 is 4 hours, and the drying time after polishing is 45 minutes. In step 205, the blank is preheated to 90-110°C before spraying; the spraying thickness is 0.025-0.035mm. In step 206, the blank is heated before extrusion, the heating temperature is 950°C±10°C, the heating time is 6-10min; the extrusion speed is 16-25 rpm. The temperature of the mold during extrusion in step 206 is 180°C-230°C. In step 206, the extrusion is completed within 5 seconds after the blank is heated. The shot peening time in step 207 is 45-60min.

[0066] Example 1

[0067] First, determine the specific parameters of the mold. The specific steps are as follows:

[0068] Step 101: According to the three-dimensional model parameters of the finished blade provided by the customer, the thickness of the inner edge plate of the tenon and the normal direction of the blade body is not increased, and a 2.5 mm margin is evenly added to other positions of the tenon and other positions of the blade, that is, the blade root, blade tip positioning boss and blade tip extension area are respectively increased to obtain the three-dimensional model parameters of the finished blade forging.

[0069] Step 102: Obtain the three-dimensional model parameters of the extruded part according to the three-dimensional model parameters of the finished blade forging part.

[0070] According to the requirements in the customer's drawings, select the specified raw materials; according to the 3D model of the finished blade forging, use the 3D design software to calculate the cross-sectional area of ​​the finished blade forging in the length direction, and add 20mm to each section. 2 The burr area is based on the circle area = πR 2 Calculate the radius of the equivalent circle equal to the area of ​​each cross-section; according to the above method, calculate the radius of the equivalent circle of each part of the finished blade forging in turn, connect each equivalent circle, and add two tangent arcs with radii of R3.0mm and R10.0mm at the blade body and tenon positions to obtain the three-dimensional model parameters of the extrusion.

[0071] Step 103: Utilizing 3D software to obtain specific parameters of the punching holes of the required mold according to the 3D model parameters of the extruded part and the thermal expansion coefficient of the raw material.

[0072] Therefore, the punch accommodating hole 10 of the mold obtained in this embodiment has an upper opening diameter of Ф20.9mm and a lower opening diameter of Ф20.6mm; the blade tenon transition hole 11 is transitioned by arcs with radii of R3.0mm and R10.0mm, which are tangent to each other; the diameters of the upper and lower openings of the blade body accommodating hole 12 are both Ф6.9mm, and the lower opening of the blade body accommodating hole 12 has a draft angle of 4°; the height of the punch accommodating hole 10 is 30mm, the height of the blade tenon transition hole 11 is 10mm, and the height of the blade body accommodating hole 12 is 10mm.

[0073] The steps to obtain the extrusion include:

[0074] Step 201: Calculating the volume of the extruded part using 3D software according to the 3D model parameters of the extruded part;

[0075] Step 202: Calculate the difference between the diameter of the leaf tenon of the extruded part and the preset value to obtain the diameter of the blank;

[0076] During extrusion, in order to facilitate the placement of the blank into the mold, the diameter of the blank should be smaller than the diameter of the punch accommodating hole 10, and its aspect ratio should be ≤3. For the economy of raw materials, the diameter of the blank is selected as Ф20.0±0.1mm according to the size of the extruded part head, and the preset value is 0.1-0.4mm.

[0077] Step 203: Calculate the height of the blank using the diameter of the blank and the volume of the extruded part; that is, the height of the blank is the volume of the extruded part divided by the bottom area of ​​the blank. After calculation, the height of the blank is 15.0.

[0078] Step 204: Select the blank according to its height and diameter, and perform finishing on it;

[0079] Step 205: spraying the finished blank;

[0080] Step 206: using a mold and a punch to extrude the sprayed blank to obtain an extruded part;

[0081] Step 207: Shot peening and pickling of the extruded parts are performed.

[0082] The specific parameters of the finishing in step 204 are:

[0083] Equipment: ROSLER R320

[0084] Ceramic media: RSD 22 / 08 35%, RSD22 / 24 35%, RX15 / 4 15%, RSX15 / 06 15%.

[0085] Cleaning agent: KMCST01A

[0086] Maximum loading quantity per time: 2000 pieces

[0087] Polishing time: 4 hours, including cleaning time: 20 minutes

[0088] Water volume regulation: 30 liters / hour

[0089] The equipment frequency is adjusted to: 1500r.pm

[0090] Cleaning: Time: 20 minutes; adjust the water flow rate to 200-220 liters / hour; dry for 45 minutes after cleaning.

[0091] The specific parameters of the spraying in step 205 are:

[0092] The purpose of spraying is to protect the raw materials, reduce oxidation and hydrogen absorption during heating; increase the lubrication performance during the subsequent pressurization process and improve the surface quality of parts.

[0093] Heat the parts to be sprayed to 90℃-110℃;

[0094] The coating on the side surface and one end face of the blank must be uniform. The distance between the spray gun and the sprayed part is 40cm, and the parts are prohibited from touching each other. Wait for 0.5 hours after spraying until the paint is dry, put the parts into the packaging box and separate the parts by layer with packaging paper, and seal the parts with large packaging paper or special covers to prevent dust and other debris from falling onto the surface of the parts. Ensure that the coating thickness is 0.025-0.035mm.

[0095] The specific parameters of step 206 are:

[0096] A 400T eccentric press was selected for this process, and the extrusion speed was 16-25 rpm;

[0097] Heating parameters: Part heating temperature 950℃±10℃, Part heating time: 6-10 minutes, Mold heating temperature: 180℃-230℃.

[0098] Maximum loading capacity: 40 pieces

[0099] Extrusion process: start timing after the first part is placed in the heating furnace, put one part in every 9-15 seconds, and put a maximum of 40 parts in. When the first part is heated for 6-10 minutes, it can be clamped out with tongs and placed in the mold to start extrusion. It should not take more than 5 seconds from the time the part is clamped out of the heating furnace to the completion of pressurization, and the subsequent parts will be carried out in turn.

[0100] The specific parameters of step 207 are:

[0101] Equipment: crawler shot blasting machine

[0102] After putting the parts into the equipment, set the working time to 45 minutes and start working. When the equipment stops working, open the equipment and check the parts. If any forgings are found to be not cleaned, continue to shot blast until they are cleaned.

[0103] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A die for producing extruded parts of compressor titanium alloy blades, characterized in that: The mold is a female mold, on which a punching hole is provided, the punching hole runs through the entire mold setting, the punching hole is used to place a blanking piece, and the punching hole comprises a punch receiving hole (10), a blade tenon transition hole (11), and a blade body receiving hole (12) which are coaxially arranged and connected in sequence; the punch receiving hole (10) is cylindrical and is used for the punch to enter from top to bottom to punch the blanking piece, so that the blanking piece is extruded downward along the blade tenon transition hole (11) and the blade body receiving hole (12), and an extruded piece is formed under the constraints of the blade tenon transition hole (11) and the blade body receiving hole (12); The upper opening diameter of the punch receiving hole (10) is larger than the lower opening diameter; The diameter of the blade tenon transition hole (11) decreases continuously from the punch receiving hole (10) to the blade body receiving hole (12), and the diameter of the upper opening is the same as the diameter of the lower opening of the punch receiving hole (10), and the diameter of the lower opening is the same as the diameter of the upper opening of the blade body receiving hole (12); The blade body receiving hole (12) is cylindrical; The height of the punch receiving hole (10): the height of the blade tenon transition hole (11): the height of the blade body receiving hole (12) is equal to 3:1:

1.

2. A method for determining die parameters for producing extruded parts of compressor titanium alloy blades, characterized in that: include: Step 101: according to the three-dimensional model parameters of the finished blade, uniform margins are added to other positions of the tenon and other positions of the blade except the inner edge plate of the tenon and the normal direction of the blade body, so as to obtain the three-dimensional model parameters of the finished blade forging; Step 102: obtaining the three-dimensional model parameters of the extruded part according to the three-dimensional model parameters of the finished blade forging part; Step 103: Utilizing 3D software to obtain specific parameters of the punching holes of the required mold according to the 3D model parameters of the extruded part and the thermal expansion coefficient of the raw material.

3. A method for producing an extruded part of a compressor titanium alloy blade, characterized in that: include: Step 201: Calculating the volume of the extrusion part using 3D software according to the 3D model parameters of the extrusion part; Step 202: Calculate the diameter of the blank by comparing the diameter of the tenon of the extruded part with a preset value; Step 203: Calculate the height of the blanking piece using the diameter of the blanking piece and the volume of the extruded piece; Step 204: Select the blank according to its height and diameter, and perform finishing on it; Step 205: spraying the finished blank; Step 206: using a mold and a punch to extrude the sprayed blank to obtain an extruded part; Step 207: Shot peening and pickling of the extruded part; The mold in step 206 is the mold described in claim 1 or a mold having the mold parameters described in claim 2.

4. A method for producing an extruded part of a compressor titanium alloy blade according to claim 3, characterized in that: The blanking piece is a columnar piece, and the center position of one end thereof protrudes outward to form a positioning column. The positioning column is used to extend into the blade tenon transition hole (11) when other parts of the blanking piece are located in the punch receiving hole (10), so that when the punch squeezes the blanking piece, the blanking piece as a whole moves downward, and the positioning column moves upward relative to the punch until it fills the punch receiving hole (10) and then continues to move downward; the other end of the blanking piece is squeezed into the blade body receiving hole (12) to facilitate the punch squeezing.

5. A method for producing an extruded part of a compressor titanium alloy blade according to claim 3, characterized in that: The polishing time in step 204 is 4 hours, and the drying time after polishing is 45 minutes.

6. A method for producing an extruded part of a compressor titanium alloy blade according to claim 3, characterized in that: In step 205, the blank is preheated to 90-110°C before spraying; the spraying thickness is 0.025-0.035mm.

7. A method for producing an extruded part of a compressor titanium alloy blade according to claim 3, characterized in that: In step 206, the blank is heated before extrusion, the heating temperature is 950°C ± 10°C, the heating time is 6 to 10 minutes, and the extrusion speed is 16 to 25 rpm.

8. A method for producing an extruded part of a compressor titanium alloy blade according to claim 3, characterized in that: The temperature of the mold during extrusion in step 206 is 180°C to 230°C.

9. A method for producing an extruded part of a compressor titanium alloy blade according to claim 3, characterized in that: In step 206, the extrusion is completed within 5 seconds after the heating of the blank is completed.

10. A method for producing an extruded part of a compressor titanium alloy blade according to claim 3, characterized in that: The shot peening time in step 207 is 45-60 minutes.

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