A cold heading die for an ultra-high pressure oil pipe ball head

Abstract

The utility model provides a kind of cold heading die for superhigh pressure oil pipe ball head, including the first spherical surface die assembly for processing formation superhigh pressure oil pipe ball head and the male die assembly for processing formation superhigh pressure oil pipe second spherical surface, concave die assembly includes locking screw rod, mould core and concave die cover, locking screw rod and concave die cover connection mould core clamping and fixing, mould core cooperates male die assembly and processes formation superhigh pressure oil pipe first spherical surface and second spherical surface.The utility model solves the problem of how to reduce the die cost of ball head in superhigh pressure oil pipe in the prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of ultra-high pressure oil pipe processing molds, and in particular to a cold heading mold for ultra-high pressure oil pipe ball heads. Background Technology

[0002] Currently, the requirements for the ball head 310 in the ultra-high pressure oil pipe 300 are relatively high because the ball head 310 and the pipe joint are hard-sealed and the pressure is high. Once there are defects such as wire drawing or indentation on the ball head 310 (especially the first spherical surface 311 on the ball head 310), it will cause system leakage and spontaneous combustion of automobile engine.

[0003] The ball head 310 is formed by a mold. The die assembly 400, used to form the first spherical surface, is a single piece made of common materials (such as Cr12 mold steel). Together with the punch assembly 500, it completes the machining of the ball head 310 in the ultra-high pressure oil pipe 300 (see...). Figures 1 to 5 However, the mold has low hardness and short lifespan, requiring complete replacement each time, resulting in high costs.

[0004] Therefore, how to reduce the mold cost of the ball head in ultra-high pressure oil pipes has become a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of this utility model is to provide a cold heading mold for ultra-high pressure oil pipe ball heads, mainly to solve the problem of how to reduce the mold cost of ball heads in ultra-high pressure oil pipes in the existing technology, and to provide a cold heading mold for ultra-high pressure oil pipe ball heads.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a cold heading die for an ultra-high pressure oil pipe ball head, comprising a die assembly for processing a first spherical surface of an ultra-high pressure oil pipe ball head and a punch assembly for processing a second spherical surface of an ultra-high pressure oil pipe ball head, characterized in that: the die assembly includes a locking screw, a die core and a die sleeve, and the outer side of the locking screw is provided with an external thread;

[0007] The mold core includes a support part and a first protrusion. The first protrusion is located on one side of the support part, and a first forming groove is provided in the middle of the first protrusion for processing to form a first spherical surface for forming an ultra-high pressure oil pipe ball head.

[0008] A positioning groove is provided on one end of the die sleeve, and a first cavity is provided inside the other side of the die sleeve. The inner surface of the first cavity is provided with an internal thread. Between the first cavity and the positioning groove is a second protrusion provided inside the die sleeve. The second protrusion forms a positioning hole, and the first cavity, the positioning hole and the positioning groove are connected.

[0009] The external thread of the locking screw matches the internal thread of the die sleeve. The first protrusion of the die core is embedded in the positioning hole of the die sleeve, and the second protrusion of the die sleeve and the locking screw clamp the support part of the die core.

[0010] Furthermore, the mold core is made of tungsten steel.

[0011] Furthermore, the surface of the mold core is coated with a PVD coating, the coating material being aluminum chromium nitride.

[0012] A cold heading die for an ultra-high pressure oil pipe ball head includes a die assembly for forming a first spherical surface of the ultra-high pressure oil pipe ball head and a punch assembly for forming a second spherical surface of the ultra-high pressure oil pipe ball head. The die assembly includes a locking screw, a die core, and a die sleeve. The locking screw and the die sleeve are connected to clamp and fix the die core. The die core cooperates with the punch assembly to form the first and second spherical surfaces of the ultra-high pressure oil pipe ball head.

[0013] In view of the above technical features, the present invention has the following beneficial effects:

[0014] 1. This utility model discloses a cold heading mold for ultra-high pressure oil pipe ball heads. The die assembly is a split type, including a locking screw, a die core, and a die sleeve. The locking screw and the die sleeve are connected and clamp the die core. The die core, together with the punch assembly, processes the ultra-high pressure oil pipe ball head to form the first spherical surface. Even if the locking screw, die core, and die sleeve are made of ordinary materials, each time the mold is replaced (e.g., when the die core is damaged), only the die core needs to be replaced. The locking screw and die sleeve can be used for a long time and can be reused, which can effectively reduce the mold cost of ball heads in ultra-high pressure oil pipes.

[0015] 2. The present invention relates to a cold heading mold for ultra-high pressure oil pipe ball head. The mold core is made of tungsten steel material, which has high hardness. After processing, the first spherical surface of the ball head has high quality and will not have defects such as wire drawing or imprinting. It can also improve the mold life and save mold costs.

[0016] 3. The present invention relates to a cold heading mold for ultra-high pressure oil pipe ball head, wherein the surface of the mold core is coated with a PVD coating, which makes the mold core more wear-resistant, improves the mold life, and can save mold costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a die assembly in the prior art. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the structure of a die assembly in the prior art. Figure 2 .

[0019] Figure 3 yes Figure 2 Sectional view of AA.

[0020] Figure 4 This is a schematic diagram of the ball joint structure in an ultra-high pressure oil pipe.

[0021] Figure 5 This is a schematic diagram of the machining of the ball head in an ultra-high pressure oil pipe using a concave die assembly and a convex die assembly in the prior art.

[0022] Figure 6 This is a schematic diagram of the cavity mold assembly in specific embodiment 1.

[0023] Figure 7 This is a cross-sectional view of the die assembly in specific embodiment 1. Figure 1 .

[0024] Figure 8 This is a cross-sectional view of the die assembly in specific embodiment 1. Figure 2 (with pins)

[0025] Figure 9 This is a schematic diagram of the machining of the ball head in the ultra-high pressure oil pipe by the concave die assembly and the convex die assembly in specific embodiment 1.

[0026] In the diagram: 100, die assembly;

[0027] 110. Locking screw; 111. External thread; 112. Second cavity; 113. Second through hole;

[0028] 120. Mold core; 121. Support part; 122. First protrusion; 123. First forming groove; 124. First through hole;

[0029] 130. Die sleeve; 131. Positioning groove; 132. First cavity; 133. Internal thread; 134. Second protrusion; 135. Positioning hole;

[0030] 140. Pin;

[0031] 200. Punch assembly;

[0032] 210. Punch base; 211. Positioning protrusion; 212. Second forming groove; 213. Third cavity;

[0033] 300. Ultra-high pressure oil pipe;

[0034] 310. Ball head; 311. First spherical surface; 312. Second spherical surface; 313. Oil passage hole; 314. Oil inlet;

[0035] 320. Pipe body;

[0036] 400. A die assembly in the prior art; 410. A pin in the prior art; 500. A punch assembly in the prior art. Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0038] See Figures 6 to 9 In specific embodiment 1, this embodiment 1 provides a cold heading die for an ultra-high pressure oil pipe ball head, including a die assembly 100 for processing a first spherical surface 311 for forming an ultra-high pressure oil pipe ball head 310 and a punch assembly 200 for processing a second spherical surface 312 for forming an ultra-high pressure oil pipe ball head 310. The die assembly 100 includes a locking screw 110, a die core 120 and a die sleeve 130. The outer side of the locking screw 110 is provided with an external thread 111.

[0039] The mold core 120 includes a support part 121 and a first protrusion 122. The first protrusion 122 is disposed on one side of the support part 121. The first protrusion 122 is provided in the middle of a first forming groove 123 for processing a first spherical surface 311 for forming a ball head 310 of an ultra-high pressure oil pipe 300.

[0040] A positioning groove 131 is provided on one end of the die sleeve 130, and a first cavity 132 is provided inside the other side of the die sleeve 130. The inner surface of the first cavity 132 is provided with an internal thread 133. Between the first cavity 132 and the positioning groove 131 is a second protrusion 134 provided inside the die sleeve 130. The second protrusion 134 forms a positioning hole 135. The first cavity 132, the positioning hole 135 and the positioning groove 131 are connected.

[0041] The external thread 111 of the locking screw 110 matches the internal thread 133 of the die sleeve 130, thereby connecting the locking screw 110 and the die sleeve 130. The first protrusion 122 of the die core 120 is embedded in the positioning hole 135 of the die sleeve 130, and the second protrusion 134 of the die sleeve 130 and the locking screw 110 clamp the support portion 121 of the die core 120.

[0042] In this embodiment 1, the die assembly 100 is a split type. The die assembly 100 includes a locking screw 110, a die core 120 and a die sleeve 130. The locking screw 110 and the die sleeve 130 are connected and clamp the die core 120. The die core 120 cooperates with the punch assembly 200 to process the ball head 310 of the ultra-high pressure oil pipe 300 to form the first spherical surface 311. Even if the locking screw 110, the die core 120 and the die sleeve 130 are made of ordinary materials (such as Cr12 mold steel), each time the mold is replaced (such as when the die core 120 is damaged), only the die core 120 needs to be replaced. The locking screw 110 and the die sleeve 130 can be used for a long time and can be reused, which can effectively reduce the mold cost of the ball head 310 in the ultra-high pressure oil pipe 300.

[0043] When processing the ball head 310 of the ultra-high pressure oil pipe 300, the first protrusion 122 of the mold core 120 is first inserted into the positioning hole 135 of the die sleeve 130. At this time, the first forming groove 123 of the mold core 120 faces the positioning groove 131. One side of the support part 121 of the mold core 120 abuts against the second protrusion 134. The locking screw 110 is inserted into the first cavity 132 of the die sleeve 130. The locking screw 110 is pressed against the other side of the support part 121 of the mold core 120. At this time, the locking screw 110 and the second protrusion 134 together clamp the support part 121 of the mold core 120 to fix the mold core 120.

[0044] The tube body 320 of the ultra-high pressure oil pipe 300 is embedded in the third cavity 213 of the punch seat 210 in the punch assembly 200. Then, the pin 140 is inserted into the second cavity 112. The end of the pin 140 passes through the second through hole 113 of the locking screw 110 and the first through hole 124 of the mold core 120 and is embedded in the oil port 314 of the ball head 310 in the ultra-high pressure oil pipe 300 to prevent damage to the oil port 314 during processing. The oil port 314 is connected to the oil hole 313 in the tube body 320.

[0045] The positioning protrusion 211 of the punch seat 210 is embedded in the positioning groove 131 of the inner die sleeve 130. At this time, the front end of the ball head 310 to be processed is embedded in the first forming groove 123 of the mold core 120, and the second forming groove 212 of the punch seat 210 is pressed on the rear end of the ball head 310 to be processed. After processing, the front end of the ball head 310 forms the first spherical surface 311, and the rear end of the ball head 310 forms the second spherical surface 312.

[0046] Preferably, the mold core 120 is made of tungsten steel, which has high hardness. After processing, the first spherical surface 311 of the ball head 310 has high quality and will not have defects such as wire drawing or imprinting. It can also improve the mold life and save mold costs.

[0047] Preferably, the surface of the mold core 120 is coated with a PVD coating (Physical Vapor Deposition), and the coating material is AICrN (aluminum chromium nitride), which has higher hardness and a lower coefficient of friction, making the mold core 120 more wear-resistant, improving mold life, and saving mold costs.

[0048] Specific embodiment 2 provides a cold heading die for an ultra-high pressure oil pipe ball head, including a die assembly 100 for forming a first spherical surface 311 of an ultra-high pressure oil pipe ball head 310 and a punch assembly 200 for forming a second spherical surface 312 of an ultra-high pressure oil pipe ball head 310. The die assembly 100 includes a locking screw 110, a die core 120 and a die sleeve 130. The locking screw 110 and the die sleeve 130 are connected to clamp and fix the die core 120. The die core 120 cooperates with the punch assembly 200 to form the first spherical surface 311 and the second spherical surface 312 of the ultra-high pressure oil pipe ball head 310.

[0049] The die assembly 100 is a split type, including a locking screw 110, a die core 120 and a die sleeve 130. The locking screw 110 and the die sleeve 130 are connected and clamp the die core 120. The die core 120 works with the punch assembly 200 to process the ball head 310 of the ultra-high pressure oil pipe 300 to form the first spherical surface 311. Even if the locking screw 110, the die core 120 and the die sleeve 130 are made of ordinary materials, each time the mold is replaced (for example, when the die core 120 is damaged), only the die core 120 needs to be replaced. The locking screw 110 and the die sleeve 130 can be used for a long time and can be reused, which can effectively reduce the mold cost of the ball head 310 in the ultra-high pressure oil pipe 300.

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A cold heading die for an ultra-high pressure oil pipe ball head, comprising a die assembly (100) for machining a first spherical surface (311) of an ultra-high pressure oil pipe ball head (310) and a punch assembly (200) for machining a second spherical surface (312) of the ultra-high pressure oil pipe ball head (310), characterized in that: The die assembly (100) includes a locking screw (110), a die core (120) and a die sleeve (130), and the locking screw (110) has an external thread (111) on its outer side; The mold core (120) includes a support part (121) and a first protrusion (122) around it. The first protrusion (122) is disposed on one side of the support part (121), and the first protrusion (122) has a first forming groove (123) in the middle for processing a first spherical surface (311) for forming an ultra-high pressure oil pipe ball head (310). A positioning groove (131) is provided on one end of the die sleeve (130), and a first cavity (132) is provided inside the other side of the die sleeve (130). The inner surface of the first cavity (132) is provided with an internal thread (133). Between the first cavity (132) and the positioning groove (131) is a second protrusion (134) provided inside the die sleeve (130). The second protrusion (134) forms a positioning hole (135). The first cavity (132), the positioning hole (135) and the positioning groove (131) are connected. The external thread (111) of the locking screw (110) matches the internal thread (133) of the die sleeve (130). The first protrusion (122) of the die core (120) is embedded in the positioning hole (135) of the die sleeve (130). The second protrusion (134) of the die sleeve (130) and the locking screw (110) clamp the support part (121) of the die core (120).

2. The cold heading die for an ultra-high pressure oil pipe ball joint according to claim 1, characterized in that: The mold core (120) is made of tungsten steel.

3. The cold heading die for an ultra-high pressure oil pipe ball joint according to claim 2, characterized in that: The surface of the mold core (120) is coated with a PVD coating, and the coating material is aluminum chromium nitride.

4. A cold heading die for an ultra-high pressure oil pipe ball head, comprising a die assembly (100) for machining a first spherical surface (311) of an ultra-high pressure oil pipe ball head (310) and a punch assembly (200) for machining a second spherical surface (312) of the ultra-high pressure oil pipe ball head (310), characterized in that: The die assembly (100) includes a locking screw (110), a die core (120), and a die sleeve (130). The locking screw (110) and the die sleeve (130) are connected to clamp and fix the die core (120). The die core (120) is processed in conjunction with the punch assembly (200) to form the first spherical surface (311) and the second spherical surface (312) of the ultra-high pressure oil pipe ball head (310).

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