V-shaped connector pipe nozzle machining method and heat setting device

Abstract

The invention discloses a V-shaped connector pipe nozzle machining method and a heat setting device. The heat setting device comprises a base, a hoop, a pull rod, a baffle, a spring, a positioning support, a positioning mandrel, an adapter mandrel and a mounting support. After being welded, the V-shaped connector pipe nozzle is assembled and positioned with the heat setting device, preliminary alignment is performed through the outer conical surface at the tail of the positioning mandrel, after the V-shaped connector pipe nozzle enters a vacuum furnace to be gradually heated, materials can be softened along with temperature rise, a spring in the heat setting device serves as a power source for continuously providing pre-pressing pressure until the conical surface guiding part is completely attached, and the V-shaped connector pipe nozzle is welded. And the size of the softened pipe nozzle is gradually aligned through the conical surface matching of the switching mandrel and the positioning mandrel, and the position degree meets the size precision requirement. And after being taken out of the vacuum furnace, the V-shaped connector nozzle is cooled at room temperature along with the heat setting device until the stress is completely released. By means of the machining method, the V-shaped connector pipe nozzles made of the titanium alloy material are correctly machined, and it is guaranteed that the position degrees of the two pipe nozzles on the V-shaped connector pipe nozzles meet the technical requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of radiator processing, in particular to the processing of a titanium alloy V-shaped interface pipe nozzle of a radiator, in particular to a heat setting device and a processing method of the V-shaped interface pipe nozzle. Background Art

[0002] like Figure 1 The figure shows a V-shaped interface nozzle for an annular radiator. The V-shaped interface nozzle belongs to a large thin-plate titanium alloy welding product. The position accuracy of the V-shaped interface nozzle is required to be controlled within the range of ±0.2mm. Titanium alloy materials have poor thermal conductivity. Heat cannot be quickly conducted away during welding. The local temperature is too high, which will cause large uneven thermal expansion in the welding area, leading to welding deformation. Titanium alloy has a low elastic modulus, poor plasticity, and high strength. It is generally not recommended to use cold working correction and hammering correction after titanium alloy deformation. Summary of the invention

[0003] In view of the problems existing in the background technology, the present invention aims to provide a V-shaped interface nozzle processing method and a heat setting device, which can realize the correct processing of the V-shaped interface nozzle made of titanium alloy and ensure that the position of the two nozzles thereon meets the technical requirements.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A V-shaped interface nozzle heat setting device, the V-shaped interface nozzle is a sheet metal part made of titanium alloy, and is mainly composed of a curved panel and two nozzles distributed in a V shape on the curved panel, the heat setting device includes:

[0006] A base, wherein a mounting support and a positioning support are arranged on the upper end surface of the base at intervals, a surface of the mounting support opposite to the positioning support serves as a mounting surface of the V-shaped interface nozzle and fits with the arc-shaped panel of the V-shaped interface nozzle, and two positioning holes are formed on the positioning support, and the angle between the axes of the two positioning holes is equal to the angle between the two V-shaped nozzles;

[0007] A transfer mandrel, wherein the first axial ends of the two transfer mandrels are respectively plugged into the two nozzles, and the end faces of the second axial ends are provided with an inner cone surface, and the inner cone surface is coaxial with the transfer mandrel;

[0008] A clamp, the clamp is used to fix the transfer mandrel and the nozzle;

[0009] Positioning mandrels, two of which are respectively installed in two positioning holes on the positioning support, and the first axial end of the positioning mandrel has an outer cone surface, the second axial end has a stepped shaft, and the outer cone surface of the positioning mandrel is matched with the inner cone surface of the transfer mandrel;

[0010] A baffle, wherein the baffle is connected to a surface of the positioning support facing away from the mounting support through a plurality of tie rods, and the plurality of tie rods are connected to the baffle through threads, and nuts are installed at the ends of the tie rods;

[0011] A spring is sleeved on the stepped shaft at the second axial end of the positioning mandrel, and the first axial end of the spring is fitted on the baffle surface, and the second axial end is fitted on the shoulder of the stepped shaft at the second axial end of the positioning mandrel.

[0012] Furthermore, the surface of the adapter core shaft also includes a circle of annular positioning protrusions coaxial with the adapter core shaft, and the annular positioning protrusions fit with the end surface of the nozzle to form an installation and tightening position of the clamp.

[0013] Furthermore, the clamp is composed of a left and a right halves, which are fastened by bolts and nuts.

[0014] Furthermore, the interior of the transfer core shaft also includes a through hole, and one end of the through hole passes through the axial first end surface of the transfer core shaft, and the second end is connected to the inner cavity formed by the inner conical surface.

[0015] Furthermore, the mounting surface of the mounting support is consistent with the back surface of the arc-shaped panel of the V-shaped interface nozzle.

[0016] Furthermore, there are at least three pull rods, and the connection points between the pull rods and the baffle are distributed on the same circumference of the baffle.

[0017] A method for processing a V-shaped interface nozzle, wherein the V-shaped interface nozzle is a sheet metal part made of titanium alloy and mainly consists of a curved panel and two nozzles distributed in a V shape on the curved panel. The processing method comprises:

[0018] S1, welding two nozzles to the curved panel;

[0019] S2, the angle of the V-shaped angle between the two nozzles is corrected by heat setting.

[0020] As an option, in S2, the aforementioned heat setting device is used, and the following steps are included:

[0021] S21, attaching the back side of the curved panel of the V-shaped interface nozzle to the mounting surface of the mounting support;

[0022] S22, inserting the axial first end of the transfer mandrel into the nozzle, and fixing the transfer mandrel and the nozzle with a clamp;

[0023] S23, taking the positioning mandrel and passing it through the mounting hole of the positioning support, and then inserting the outer conical surface of the positioning mandrel into the inner conical surface of the transfer mandrel;

[0024] S24, tighten the nut at the end of the pull rod, drive the baffle to compress the spring, and then push the outer cone surface of the positioning mandrel to further fit the inner cone surface of the transfer mandrel and press the V-shaped interface nozzle onto the mounting surface of the mounting support;

[0025] S25, placing the V-shaped interface nozzle and the heat setting device together in a vacuum furnace for heating and heat setting;

[0026] S26, after the heat setting is completed, the V-shaped interface nozzle and the heat setting device are taken out of the vacuum furnace together, until they are cooled to room temperature, and then the V-shaped interface nozzle is disassembled from the heat setting device.

[0027] Compared with the prior art, the present invention has the following characteristics:

[0028] 1. The heat setting device is relatively simple to assemble and manufacture, and is relatively convenient to use;

[0029] 2. Ensure the processing technology requirements of the V-shaped interface nozzle products, and achieve the position accuracy of the two V-shaped nozzles controlled within the range of ±0.2mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of a V-shaped interface nozzle product;

[0031] Figure 2 It is a plan view of a heat setting device;

[0032] Figure 3 It is a three-dimensional stereogram of the heat setting device;

[0033] Figure 4 This is a schematic diagram of the state where the transfer mandrel is installed on the V-shaped interface nozzle through a clamp;

[0034] Figure 5 It is a schematic diagram of the cooperation between the baffle, spring, positioning mandrel and transfer mandrel in the heat setting device;

[0035] Figure 6 The diagram is a matching diagram of a baffle, a pull rod, a spring, a positioning mandrel, a transfer mandrel, a clamp and a V-shaped interface nozzle in a heat setting device;

[0036] Figure 7 It is a cross-sectional schematic diagram of the heat setting device and the V-shaped interface nozzle after assembly;

[0037] In the figure, 1-base, 2-clamp, 3-pull rod, 4-baffle, 5-spring, 6-positioning support, 7-positioning mandrel, 8-transfer mandrel, 9-installation support. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0039] like Figure 1 As shown, the V-shaped interface nozzle to be processed in the present invention includes an arc panel and two nozzles welded on the arc panel. The two nozzles are distributed in a V shape. The technical requirement is that the position accuracy of the V nozzle is controlled within the range of ±0.2mm. Since the V-shaped interface nozzle is a thin plate titanium alloy welded part, the present invention adopts overall heat treatment correction, and the V-shaped interface nozzle is placed in a vacuum furnace under the protection of inert gas and heated to a certain temperature, and then slowly cooled, and the deformation is corrected by changing the residual stress distribution inside the V-shaped interface nozzle.

[0040] See also Figure 1 The present invention mainly solves the problem of controlling the position accuracy of the titanium alloy V-shaped interface nozzle within the size range of ±0.2mm. Considering that the nozzle position will deform irregularly after welding, it is necessary to correct the position accuracy of the two nozzles distributed in the V-shape to the size range of ±0.2mm through subsequent heat setting.

[0041] The following key issues need to be addressed during the heat setting temperature heating process:

[0042] 1. How to locate the nozzle position after welding before the V-shaped nozzle enters the vacuum furnace for heating?

[0043] 2. How to design the power source for position correction when the V-shaped interface nozzle enters the vacuum furnace and is heated in the high-temperature vacuum furnace?

[0044] 3. After the V-shaped interface nozzle is taken out of the vacuum furnace, how to accurately control the position accuracy of the V-shaped interface nozzle within the size range of ±0.2mm after thermal expansion and contraction.

[0045] Based on the fact that the curved panel and the two nozzles on the curved panel are both made of titanium alloy, the present invention adopts a welding method to weld the two nozzles to the curved panel, and then corrects the V-shaped angle between the two nozzles by heat setting, thereby controlling the position accuracy within the range of ±0.2mm.

[0046] like Figure 2 to Figure 7 As shown, the present invention designs a heat setting assembly device, which includes a base 1, a clamp 2, a pull rod 3, a baffle 4, a spring 5, a positioning support 6, a positioning mandrel 7, a transfer mandrel 8 and a mounting support 9.

[0047] The upper end surface of the base 1 is provided with a mounting support 9 and a positioning support 6 at intervals. The surface of the mounting support 9 opposite to the positioning support 6 serves as the mounting surface of the V-shaped interface nozzle and fits with the arc panel of the V-shaped interface nozzle. The positioning support 6 has two positioning holes, and the angle between the axes of the two positioning holes is equal to the angle between the two V-shaped nozzles. The axial first ends of the two transfer mandrels 8 are respectively plugged with the two nozzles, and the end surface of the axial second end is provided with an inner cone surface, and the inner cone surface is coaxial with the transfer mandrel 8. The clamp 2 is used to fix the transfer mandrel 8 and the nozzle. The two positioning mandrels 7 are respectively installed in the two positioning holes on the positioning support 6 , and the first axial end of the positioning mandrel 7 has an outer cone surface, and the second axial end has a stepped shaft, and the outer cone surface of the positioning mandrel 7 is matched with the inner cone surface of the transfer mandrel 8; the baffle 4 is connected to the surface of the positioning support 6 facing away from the mounting support 9 through four tie rods 3, and the four tie rods 3 are connected to the baffle 4 through threads, and nuts are installed at the ends of the tie rods 3, and the connection points between the tie rods 3 and the baffle 4 are distributed on the same circumference of the baffle 4; the spring 5 is sleeved on the stepped shaft at the second axial end of the positioning mandrel 7, and the first axial end of the spring 5 fits on the surface of the baffle 4, and the second axial end fits on the shoulder of the stepped shaft at the second axial end of the positioning mandrel 7. The surface of the transfer mandrel 8 also includes a circle of annular positioning protrusions coaxial with the transfer mandrel 8, and the annular positioning protrusions fit with the end face of the nozzle to form the installation clamping position of the clamp 2. The clamp 2 is composed of left and right petals, and the left and right petals are locked by bolts and nuts. The adapter core shaft 8 also includes a through hole, one end of which passes through the first axial end face of the adapter core shaft 8, and the second end is connected to the inner cavity formed by the inner conical surface. The mounting surface of the mounting support 9 is consistent with the back surface shape of the arc panel of the V-shaped interface nozzle.

[0048] The assembly process of the heat setting device and the V-shaped interface nozzle is as follows:

[0049] 1. The two nozzles of the V-shaped interface nozzle are respectively connected to the transfer mandrel 8 through the clamp 2, see Figure 4 As shown;

[0050] 2. The positioning mandrel 7 and the transfer mandrel 8 are connected by a conical surface, see Figure 5 As shown;

[0051] 3. The spring 5 is preloaded by adjusting the pull rod 3 to preload the positioning mandrel 7 and the transfer mandrel 8. Figure 6 As shown;

[0052] 4. Use pre-compression pressure to fit the back of the V-shaped interface nozzle to the surface of the mounting support 9. Figure 7 As shown;

[0053] 5. Place the heat setting device and the V-shaped interface nozzle into a vacuum furnace for heating;

[0054] 6. Take the heat setting device and the V-shaped interface nozzle out of the vacuum furnace and cool them to room temperature.

[0055] Before the V-shaped interface nozzle enters the vacuum furnace for heating, it is first assembled and positioned with the heat setting device. First, the transfer mandrel 8 is connected to the nozzle, and the outer cone surface at the tail of the positioning mandrel 7 is used for preliminary alignment. At this time, the outer cone surface and the inner cone surface are affected by the nozzle welding deformation. The cone surface ( Figure 5 The guide part (the position indicated by the letter A in the middle) is not fully matched. After the V-shaped interface nozzle enters the vacuum furnace and is gradually heated, the material will soften as the temperature rises. A high-temperature resistant spring 5 is designed in the heat setting device. The spring 5 serves as a power source to continuously provide pre-compression pressure until the conical guide part is fully fitted. The softened nozzle size is gradually aligned through the conical surface matching of the adapter mandrel 8 and the positioning mandrel 7, and the position accuracy returns to the dimensional accuracy requirements. After the V-shaped interface nozzle is taken out of the vacuum furnace, it is cooled at room temperature together with the heat setting device. After the temperature cools to room temperature, the stress of the V-shaped interface nozzle is completely released. After being taken out, the position accuracy of the two nozzles of the V-shaped interface nozzle no longer changes, which meets the technical requirements.

[0056] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A V-shaped interface nozzle heat setting device, wherein the V-shaped interface nozzle is a sheet metal part made of titanium alloy and mainly consists of a curved panel and two nozzles distributed in a V shape on the curved panel, characterized in that: The heat setting device includes: A base (1), wherein an upper end surface of the base (1) is provided with a mounting support (9) and a positioning support (6) at intervals, a surface of the mounting support (9) opposite to the positioning support (6) serving as a mounting surface of the V-shaped interface nozzle and being in contact with the arc-shaped panel of the V-shaped interface nozzle, and the positioning support (6) is provided with two positioning holes, and the angle between the axes of the two positioning holes is equal to the angle between the two V-shaped nozzles; A transfer mandrel (8), wherein the first axial ends of the two transfer mandrels (8) are respectively plugged into the two nozzles, and the end faces of the second axial ends thereof are provided with an inner conical surface, and the inner conical surface is coaxial with the transfer mandrel (8); A clamp (2), wherein the clamp (2) is used to fix the transfer mandrel (8) and the nozzle; A positioning mandrel (7), wherein two positioning mandrels (7) are respectively installed in two positioning holes on the positioning support (6), and the first axial end of the positioning mandrel (7) has an outer conical surface, and the second axial end has a stepped shaft, and the outer conical surface of the positioning mandrel (7) is matched with the inner conical surface of the transfer mandrel (8); A baffle (4), wherein the baffle (4) is connected to a surface of the positioning support (6) facing away from the mounting support (9) through a plurality of tie rods (3), and the plurality of tie rods (3) are all connected to the baffle (4) through threads, and nuts are installed at the ends of the tie rods (3); A spring (5), wherein the spring (5) is sleeved on the stepped shaft at the second axial end of the positioning core shaft (7), and the first axial end of the spring (5) is in contact with the surface of the baffle (4), and the second axial end is in contact with the shoulder of the stepped shaft at the second axial end of the positioning core shaft (7).

2. A V-shaped nozzle heat setting device according to claim 1, characterized in that: The surface of the transfer mandrel (8) also includes a circle of annular positioning protrusions coaxial with the transfer mandrel (8), and the annular positioning protrusions fit with the end surface of the nozzle to form the installation clamping position of the clamp (2).

3. A V-shaped nozzle heat setting device according to claim 2, characterized in that: The clamp (2) is composed of a left and a right halves spliced ​​together, and the left and right halves are locked by bolts and nuts.

4. A V-shaped nozzle heat setting device according to claim 2, characterized in that: The transition core shaft (8) further comprises a through hole inside, and one end of the through hole passes through the axial first end face of the transition core shaft (8), and the second end is connected to the inner cavity formed by the inner conical surface.

5. A V-shaped nozzle heat setting device according to claim 1, characterized in that: The mounting surface of the mounting support (9) is consistent with the back surface of the arc-shaped panel of the V-shaped interface nozzle.

6. A V-shaped nozzle heat setting device according to claim 1, characterized in that: There are at least three pull rods (3), and the connection points between the pull rods (3) and the baffle (4) are distributed on the same circumference of the baffle (4).

7. A method for processing a V-shaped interface nozzle, wherein the V-shaped interface nozzle is a sheet metal part made of titanium alloy and mainly consists of a curved panel and two nozzles distributed in a V shape on the curved panel, characterized in that: include: S1, welding two nozzles to the curved panel; S2, the angle of the V-shaped angle between the two nozzles is corrected by heat setting.

8. A method for processing a V-shaped interface nozzle according to claim 7, characterized in that: In S2, the heat setting device according to claim 1 is used, and the steps are as follows: S21, attaching the back side of the curved panel of the V-shaped interface nozzle to the mounting surface of the mounting support (9); S22, inserting the axial first end of the transfer core shaft (8) into the nozzle, and fixing the transfer core shaft (8) and the nozzle with a clamp (2); S23, passing the positioning mandrel (7) through the mounting hole of the positioning support (6), and then inserting the outer conical surface of the positioning mandrel (7) into the inner conical surface of the transfer mandrel (8); S24, tighten the nut at the end of the pull rod (3), drive the baffle (4) to compress the spring (5), thereby pushing the outer conical surface of the positioning mandrel (7) to further fit the inner conical surface of the transfer mandrel (8) and press the V-shaped interface nozzle onto the mounting surface of the mounting support (9); S25, placing the V-shaped interface nozzle and the heat setting device together in a vacuum furnace for heating and heat setting; S26, after the heat setting is completed, the V-shaped interface nozzle and the heat setting device are taken out of the vacuum furnace together, until they are cooled to room temperature, and then the V-shaped interface nozzle is disassembled from the heat setting device.

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