具体实施方式

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。

需要说明的是，本实施例中所提供的图示仅以示意方式说明本发明的基本构想，遂图式中仅显示与本发明中有关的组件而非按照实际实施时的组件数目、形状及尺寸绘制，其实际实施时各组件的型态、数量及比例可为一种随意的改变，且其组件布局型态也可能更为复杂。

当异形注水孔进行涨型工序时，需要对异形注水孔进行密封处理，异形注水孔的密封方式有可以下两种：

一种是硬密封直接封堵待加工件的管端两头的方式，该种密封方式密封效果差，对设备控制精度要求极高，无法满足加工件的管端斜口状态下对涨型介质的密封。

另一种是使用软密封，由于使用的聚氨酯容易损坏，需经常更换，易造成设备停机，且密封空间和位置均需要占用更多尺寸的管材，同等情况下比硬密封多出至少40MM料长，成本增加明显。

为了提高异形注水孔中的密封性能，请参考图1，本发明提供一种注水杆组件，其包括：转接板1，注水杆2，转向硬顶头3，密封圈4，螺栓5。转接板1固定连接注水杆2，转向硬顶头3嵌设在注水杆2的一端，密封圈4设置在转向硬顶头3内，螺栓5贯穿在转向硬顶头3，且插设在注水杆2内。

请参考图1及图2，在本发明的一实施例中，转接板1安装在密封油缸的法兰面上，注水杆2通过螺钉安装在转接板1的法兰面上，转向硬顶头3设置在注水杆2的一端内，密封圈4放置在转向硬顶头3内，螺栓5依次贯穿转向硬顶头3及密封圈4。

请参考图2及图3，在本发明的实施例中，转接板1的形状例如是圆柱体，方便用于安装油缸。转接板1例如可以是油缸转接板，转接板1上设置有第一通孔11及第二通孔12，第一通孔11贯穿于转接板1，且位于转接板1较大圈层位置。第一通孔11的数量例如至少是六个，第一通孔11用于将若干个螺栓件紧固在密封油缸的法兰面上。第二通孔12设置在临近第一通孔11圈层位置，相对于第一通孔11且位于内圈，第二通孔12用于将若干个螺栓件紧固在转接板1上。

请参考图1、图4及图5，在本发明的实施例中，注水杆2通过若干个螺栓件固定在转接板1上，注水杆2用于向待加工件内部补液增压。注水杆2可包括注水口21，注水孔22，凹槽23及固定孔24，注水口21垂直连接注水孔22，注水孔22连接凹槽23，固定孔24设置在注水孔22的两侧。

如图1至图5所示，注水口21开设于靠近转接板1的一侧，方便连接增压设备。注水口21设置在注水杆2的一端，且垂直贯穿注水杆2，注水口21外接高压水管，用于将液体的输送至注水杆2中的注水孔22内，使得待加工件执行涨型工序。注水口21可包括第一通管211及第二通管212，第一通管211连接第二通管212。第一通管211的形状为空心圆柱，用于注入高压液体。第二通管212的上部件为空心圆柱，第二通管212的下部件为中空锥形体。其中，第二通管212的上部件的直径小于第二通管212的下部件的直径，方便高压液体聚集注入注水孔22内。第二通管212贯穿于注水孔22的上表面，第二通管212将由经注水口21流入的涨型介质传输至注水孔22内。

如图4至图5，注水孔22设置在注水杆2内，注水孔22用于流通孔内涨型介质。注水孔22可包括第一注水孔221及第二注水孔222，第一注水孔221连接第二注水孔222，如图5所示，第一注水孔212连接第二通管212，来自第二通管212的高压液体由第一注水孔221流经第二注水孔222，并将高压液体传送至相应的螺栓件。第一注水孔212的直径小于第二注水孔222的直径，便于第二注水孔222容置螺栓件，使得第二注水孔222用于容纳螺栓件的一端。

如图1及图4所示，凹槽23设置在注水杆2内的另一端，用于容纳安装转向硬顶头3。凹槽23的侧面投影形状为半圆形，凹槽23的开口处是出水口231，出水口231的直径等于注水杆2的直径，方便出水口231连接转向硬顶头3，使得转向硬顶头3的外壁与凹槽23内壁紧密贴合。

如图5及图6，固定孔24开设在注水杆2内的一端，且临近注水口21的位置，若干个螺栓件通过固定孔24安装在转接板1上。固定孔24设置在注水孔22的四周，以注水孔22位圆心，固定孔24向四周散射，且临近位于注水孔22的两侧。固定件24用于安装螺栓件。固定孔24的数量例如至少是四个，使得螺栓件可稳定紧固在转接板1上。

请参考图7及图9，在本发明的一实施例中，转向硬顶头3嵌设在注水杆2内的一端，当注水杆组件经由油缸驱动靠近待加工件的端面时，此时转向硬顶头3的中轴线与注水杆2处于同轴状态，且转向硬顶头3的前锥面导入待加工件的管壁内部。如图9所示，转向硬顶头3可一体成型，当一体成型的转向硬顶头3与注水杆2紧密耦合后，转向硬顶头3可以紧密贴合注水杆2的一端，便于提高转向硬顶头3的密封性。进一步地，转向硬顶头3可包括下半球体31及顶柱32，顶柱32设置在下半球体31上，下半球体31连接顶柱32，两者之间可以相互连接。其中，下半球体31的侧向投影是半圆形，当下半球体31的中轴线与顶柱32的中轴线重合时，转向硬顶头3保持水平，方便涨型介质顺利流入转向硬顶头3的孔3A内。由于下半球体31与顶柱32为非对称结构，顶柱32的直径等于下半球体31的直径，下半球体31与顶柱32结合后也可以一体成型，形成一体成型的转向硬顶头3。当待加工件的一端可能出现管端具有斜口现象，在待加工件的管端的反作用力作用下，随着转动下半球体31至某个角度时，顶柱32并与之随着下半球体31的转动轨迹同步转动，进而可形成一体成型的转向硬顶头3。此时，转向硬顶头3自动调整轴向，使得下半球体31的外壁紧密贴合凹槽23的内壁，实现转向硬顶头3与注水杆2之间贴合面的密封性。然不限于此，转向硬顶头3也可根据待加工件材料内部应力实际情况，自动调整轴向，实现外侧内侧的补料量，有效解决弯管成型中内部起皱，外部开裂的问题。

如图9-图10所示，在本发明的一实施例中，当注水杆组件经由油缸驱动靠近待加工件的端面时，当转向硬顶头3可调整的角度为0°时，待转向硬顶头3与注水杆2的中轴线重合后，转向硬顶头3的下半球体31下部分311紧密贴合凹槽23内壁，下部分311与下半球体31的上部分312的重合处与出水口231重合，使得上部分312位于在注水杆2与代加工件之间，进而提高注水杆组件的密封性。具体地，转向硬顶头3沿轴向方向开设有孔3A，孔3A可包括通孔313，柱孔314及开孔321，通孔313连接柱孔314，且贯穿于下半球体31形成容纳空间，容纳空间用于容纳螺栓件。其中，通孔313的径向投影形状可为梯形，且轴向投影是圆形，待下部分311发生转动后，容纳空间内的螺栓件的中轴线仍与下部分311的原中轴线重合，使得下部分311可旋转至某一特定角度。当注水杆组件经由油缸驱动靠近待加工件的端面时，柱孔314的中轴线与通孔313的中轴线重合后，用于耦合待加工件的顶柱32中轴线处开设有开孔321，开孔321连接柱孔314，开孔321可将流经柱孔314内的高压液体注入至待加工件的加工模具型腔内。顶柱32的顶部一侧开设有斜锥面322，斜锥面322便于待加工件更容易套设在顶柱32上。斜锥面322的周向边缘开设有倒角323，倒角323使得待加工件的内壁顺利套滑过斜锥面322，方便待加工件套设在顶柱32上。斜锥面322的外侧壁与下半球体31顶部之间具有台阶33，台阶33将顶柱32连接下半球体31，当待加工件全面覆盖台阶33及顶柱32的上表面及其侧面，待加工件的端口与注水杆2端口连接贴合的更加紧密。

请参考图2及图9，在本发明的一实施例中，将待加工件套筒在加工件模具内，在满足转接板1连接的油缸内形成所需条件后，待注水杆组件内压力达到预设的型腔压力，待加工件的管口通过转向硬顶头3连接注水杆2的一端，实施执行涨型工序，此时由于注水杆2内的涨型介质压力，使得转向硬顶头3发生转动，转向硬顶头3偏离其中轴线一定的角度，涨型介质通过插设在转向硬顶头3内的螺栓5流入待加工件，随着涨型介质的流量减少，通过转向硬顶头3安装在注水杆2上的加工件，加工件与加工件模具之间的压力缓慢卸荷，直至卸荷结束，将加工件模具型腔开启，取出加工件，完成涨型工序。由于密封圈4的作用力可将转向硬顶头3回复至初始位置，转向硬顶头3的轴向与注水杆2的轴向处于同轴状态，等待下一次的涨型工序。

请参考图2及图9，在本发明的实施例中，密封圈4嵌设在转向硬顶头3内，且位于顶柱32的开孔321的底部，密封圈4贴合下半球体31的上表面，使得密封圈4处于螺栓5头部与转向硬顶头3中间位置，且处于预压紧状态。密封圈4用于提高转向硬顶头3与待加工件之间的空间密封性，密封结构简单。

如图9所示，中空结构的螺栓5插设于转向硬顶头3的中轴线上，使得螺栓5的尾部位于下半球体31的通孔313及柱孔314内，螺栓5的头部卡设于顶柱32的开孔321内。螺栓5设置有第一孔51，第一孔51贯穿螺栓5的中轴线，第一孔51用于输入液体至待加工件内部。螺栓5例如可以是六角法兰面螺栓，螺栓5用于将转向硬顶头3与注水杆2进行紧固。

请参考图1、图5及图9，在本发明的一实施例中，转接板1，注水杆2，转向硬顶头3，密封圈4，螺栓5组合形成注水杆组件。注水杆组件经由油缸驱动靠近待加工件端面，使得转向硬顶头3的轴向与注水杆2处于同轴状态。转向硬顶头3的顶柱32导入待加工件的管壁内部，随着油缸继续推进，转向硬顶头3的台阶33逐渐贴附待加工件的管端。

另外，当注水杆2形成达到合适的密封位置时，增压设备通过高压管路通过注水口21将液体向注水杆2内注入，液体流经螺栓5的第一孔51，将高压液体注入待加工件的毛坯管内，当待加工件管内充盈涨型介质后，增压缸持续提供压力至待加工件管内，与此同时，密封油缸适当前行进行补料工序，使得待加工件被胀形至与加工件模具型腔贴合，完成涨型工序。

如图9所示，当待加工件的管端是倾斜状态时，则待加工件的管端存在斜口，在待加工件管端的反作用力的作用下，转向硬顶头3自动调整轴向，转向硬顶头3可调整的最大角度范围是0-10°，转向硬顶头3可自动调整角度例如可以是5°，6°，7°，8°，转向硬顶头3可自动调整的最大角度在本发明中是7°。调整后的转向硬顶头3的台阶33能与待加工件的斜口端面接触，进而达到密封条件，与此同时，密封圈4整体处于压缩状态，且局部压缩比更大，进而提高注水杆组件整体的密封性。

请参考1及图10，在本发明的一实施例中，本发明提供一种注水杆组件的工作时，油缸驱动注水杆2使得转向硬顶头3插入需要高压涨型的待加工件的端口部，调整油缸进给位置使得转向硬顶头3的下半球体31与待加工件内壁及端部充分贴合，起到密封作用。增压设备产生高压液体，高压液体通过高压管路将高压液体由经注水口21向注水杆2内注入，待加工件内部进行补液增压，从而使待加工件表面充分贴敷在成型模具型腔内，完成待加工件的涨型工序。

请参考1、图9及图10，在本发明的另一实施例中，由于L型待加工件在执行涨型工序之前，需要在前道工序增加弯管，当注水杆组件涨型L型待加工件时，待L型待加工件增加弯管后，L型待加工件的管端口处于倾斜状态，使得L型待加工件的隆起区域A发生开裂现象，L型待加工件的凹陷区域B发生褶皱现象。

如图10所示，执行涨型工序过程中，在满足L型待加工件外侧增加补料，L型待加工件内侧尽力减少补料的条件后，转向硬顶头3的端面根据待加工件的材料成分及其内部应力实际情况进行自动调整轴向，使得L型待加工件外侧的补料量增至10mm，L型待加工件内侧补料量增至3mm，用于提高L型待加工件的管壁厚度，预防隆起区域A产生开裂现象，凹陷区域B产生褶皱现象。

请参考1、图9及图10，在本发明的另一实施例中，由于S型待加工件在执行涨型工序之前，亦需要在前道工序增加弯管。当注水杆组件涨型S型待加工件时，增加弯管后的S型待加工件的管端口处于倾斜状态，导致S型待加工件的端口具有斜口，使得S型待加工件的隆起区域A发生开裂现象，S型待加工件的凹陷区域B发生褶皱现象。

如图10所示，执行涨型工序过程中，在满足S型待加工件外侧增加补料，S型待加工件内侧尽力减少补料的条件后，转向硬顶头3的端面根据待加工件的材料成分及其内部应力实际情况进行自动调整轴向，使得S型待加工件外侧的补料增至10mm，S型待加工件内侧补料增至3mm，用于提高S型待加工件的管壁厚度，预防隆起区域A产生开裂现象，凹陷区域B产生褶皱现象。

综上所述，本发明提供一种注水杆组件，该装置密封结构简单，简单的密封结构降低了制造成本和生产成本。该装置设有可调节角度的转向硬顶头，可满足待加工件的加工形状，增强待加工件的端口的密封效果。该装置可以根据待加工件材料内应力进行自动调节内外侧的补料量，解决待加工件涨型过程中的待加工件内部起皱现象和其外部开裂现象。

以上公开的本发明优选实施例只是用于帮助阐述本发明。优选实施例并没有详尽叙述所有的细节，也不限制该发明仅为所述的具体实施方式。显然，根据本说明书的内容，可作很多的修改和变化。本说明书选取并具体描述这些实施例，是为了更好地解释本发明的原理和实际应用，从而使所属技术领域技术人员能很好地理解和利用本发明。本发明仅受权利要求书及其全部范围和等效物的限制。

Mode of execution

, Technical solutions in the embodiments of the present invention will be apparent from the accompanying drawings in the embodiments of the present invention. , It will be apparent that the described embodiments are only part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the illustration provided in this embodiment illustrates only the basic idea of the present invention in a schematic manner, and only the components related to the present invention rather than the number, shape, and size of the components in actual practice are shown.

When the special-shaped water injection hole is expanded, the special-shaped water injection hole needs to be sealed, and the sealing mode of the special-shaped water injection hole can be divided into two types.

The sealing mode is poor in sealing effect, high in requirement on equipment control precision and incapable of meeting the sealing of a bulging medium in a pipe end inclined port state of a machined part.

In addition, due to the fact that the used polyurethane is easy to damage, frequent replacement is needed, equipment is easy to stop, the sealing space and the position are required to occupy more sizes of pipes, and at least 40 mm materials are longer than the hard seal in the same condition, and the cost is increased obviously.

To FIG. 1, the present invention provides a water injection rod assembly comprising: an adapter plate 1, a water injection rod 2, a steering hard top head 3, a seal ring 4, and a bolt 5. The adapter plate 1 is fixedly connected with the water injection rod 2, the steering hard top head 3 is embedded at one end of the water injection rod 2, the sealing ring 4 is arranged in the steering hard top head 3, and the bolt 5 penetrates through the steering hard top head 3 and is inserted into the water injection rod 2.

To FIGS 1 and 2, in an embodiment of the present invention, the adapter plate 1 is mounted on the flange surface of the sealing cylinder, and the water injection rod 2 is mounted on the flange surface of the adapter plate 1 by screws, and the steering hard top head 3 is disposed inside the steering hard top head 2. The bolt 4 passes through the steering hard top head 3 and the sealing ring 5 4 3 in this order.

Please refer to FIG. 2 and FIG. 3. In an embodiment of the invention, the adapter plate 1 is shaped, for example, as a cylinder, conveniently for mounting an oil cylinder. The adapter plate 1 is, for example, an oil cylinder adapter plate, 1 through holes first and 11 through holes second are formed in the adapter plate 12, first through holes 11 penetrate through the adapter plate 1, and the adapter plate 1 is located at a larger ring layer position. The first Through-holes 11 are, for example, at least six, first through-holes 11 for fastening several bolt members on the flange face of the sealing cylinder. The second Through-holes 12 are provided adjacent first through-holes 11, with respect to first through holes 11 and on the inner ring, second through holes 12 for fastening several bolt members. On the adapter plate 1.

To FIG. 1, FIG. 4 and FIG. 5, in an embodiment of the present invention, the water injection rod 2 is fixed to the adapter plate 1 through several bolt members, and the water injection rod 2 is configured to pressurize the interior of the workpiece to be machined. Water injection rod 2 can include water injection port 21, water injection hole 22, recess 23 and fixed orifices 24, water injection port 21 perpendicular connection water injection hole 22, water injection hole 22 connect recess 23, and fixed orifices 24 are provided on both sides of water injection hole 22.

As shown 1 through 5, there is shown. The water injection port 21 is arranged on one side of the adapter plate 1 to facilitate connection of supercharging equipment. Water inlet 21 is arranged at one end of water injection rod 2, penetrates through water injection rod 2 vertically, and water injection nozzle 21 is externally connected with high pressure water pipe for conveying liquid into water injection hole 2 in water injection rod 22. The water injection port 21 may include first through pipes 211 and second through pipes 212, first through pipes 211, and second through pipes 212. The first The tube 211 is in the form of a hollow cylinder for injecting high pressure liquid. The upper part second of the pipe 212 is a hollow cylinder, and the lower part second of the pipe 212 is a hollow cone. Wherein. The second Through-tube 212 has a diameter smaller than the diameter second of the lower part of tube 212, facilitating high-pressure liquid build-up into injection hole 22. The second Through pipe 212 runs through the upper surface of water injection hole 22, second through pipe 212 transmits the expansion type medium that flows into through injection nozzle 21 into water injection hole 22.

As shown 4 through 5, FIGS. Water injection hole 22 is arranged in water injection rod 2, and water injection hole 22 is used for interior expansion type medium of circulation hole. Water holes 22 may include first water injection holes 221 and second water injection holes 222, first water injection holes 221 and second water injection holes 222, 5 water injection holes first are connected 212 through pipes second high pressure liquid from 212 pipe second flows through 212 water injection holes first through 221 water injection holes second 222, and high pressure liquid is conveyed to corresponding bolt parts. The first Water injection hole 212 is less than second water injection hole 222's diameter, is convenient for second water injection hole 222 accommodation bolt spare for second water injection hole 222 is used for. One end of the receiving bolt member.

As shown 1 and 4, the groove 23 is provided at the other end inside the water injection rod 2 for receiving and mounting the steering hard ejection head 3. The groove 23 is semicircular, the opening of the groove 23 is a water outlet 231, the diameter of the water outlet 231 is equal to that of the water injection rod 2, the water outlet 231 is conveniently connected to the hard top head 3, and the outer wall of the steering hard top head 3 is closely attached to the inner wall of the groove 23.

As 5 and 6, the fixing hole 24 is formed at one end inside the water injection rod 2 and adjacent to the water injection port 21, and a plurality of bolt members are mounted on the adapter plate 24 through the fixing holes 1. A fixing hole 24 is provided around the water injection hole 22 to center the water injection hole 22, and the fixing hole 24 is scattered around the water injection hole 22. The fixing member 24 is for mounting a bolt member. The number of fixing holes 24 is, for example, at least four so that the bolt member can be stably fastened to the adapter plate 1.

Please refer to FIG. 7 and FIG. 9. In one embodiment of the present invention, the steering hard ejection head 3 is embedded at one end inside the water injection rod 2, and when the water injection rod assembly drives the end surface close to the workpiece to be machined via the oil cylinder, the central axis of the steering hard top head 3 3 and the water injection rod 2 are in a coaxial state. As shown 9, the steering hard top head 3 may be integrally formed, and when the integrally formed steering hard top head 3 and the water injection rod 2 are tightly coupled, the steering hard top head 3 may closely contact one end of the water injection rod 2 to facilitate improving the sealing property of the steering hard top head 3. Further, the steering hard top head 3 may include a lower hemisphere 31 and a top pillar 32. The top pillar 32 is disposed on the lower hemisphere 31, the lower hemisphere 31 is connected to the top pillar 32, and may be connected to each other. The lateral projection of the lower hemisphere 31 is semicircular, and when the central axis of the lower hemisphere 31 coincides with the central axis of the top post 32, the steering hard top head 3 keeps horizontal, so that the expanding medium smoothly flows into the hole 3A of the steering hard top head 3. Since the lower hemisphere 31 and the top post 32 are asymmetrical, the diameter of the top post 32 is equal to that of the lower hemisphere 31, and the lower hemisphere 31 and the top post 32 are combined to form an integrally formed steering hard top head 3. When one end of a to-be-machined part is likely to have an oblique opening phenomenon. Under the action of the reaction force of the pipe end of the to-be-machined part, as the lower hemisphere 31 rotates to a certain angle, the top column 32 and the lower hemisphere 31 rotate synchronously, so that the integrally formed steering hard top head 3 can be formed. At this time, the steering hard top head 3 automatically adjusts the axial direction so that the outer wall of the lower hemisphere 31 fits tightly against the inner wall of the groove 23, and the sealing property of the bonding surface between the hard top head 3 and the water injection rod 2 is realized. However, the steering hard top head 3 can automatically adjust the axial direction according to the actual situation of the internal stress of the material to be machined, and realize the compensation amount on the inner side of the outer side. The problem of inside creping, external fracture in the bent pipe shaping effectively is solved.

9 - Is shown 10. In an embodiment of the present invention, when the water injection rod assembly is driven toward the end surface of the workpiece to be machined via the cylinder, the lower portion 3 of the steering hard top head 0° fits tightly against the center axis of the water injection rod 3, and the lower portion 2 and the upper portion 3 31 of the lower hemisphere 231 312 31 coincide with the 312 water outlet 311 such that 2 the upper portion 23 is positioned between the water injection rod 311 and the replacement part. , The steering hard top head 3 is provided with holes 3A in the axial direction. The hole 3A may include a through hole 313, a pillar hole 314 and an opening 321, through 313 connecting the pillar hole 314, and through the lower hemisphere 31 to receive a space for receiving a bolt member. The radial projection shape of the through hole 313 may be trapezoidal, and the axial projection is circular, and the central axis of the bolt member in the receiving space may still overlap the original central axis of the lower portion 311 after the lower portion 311 is rotated, so that the lower portion 311 may be rotated to a certain angle. When the water injection rod assembly drives the end face close to the workpiece to be machined via the oil cylinder, the central axis of the column hole 314 coincides with the central axis of the through hole 313. The central axis of the top post 32 used for coupling the workpiece to be processed is provided with an opening 321, the opening 321 is connected with the column hole 314, and the opening 321 can inject the high pressure liquid flowing through the column hole 314 into a machining mold cavity to be machined. The top side of the top post 32 is provided with an inclined conical surface 322, and the inclined cone 322 is convenient for being sleeved on the top column 32 more easily. The circumferential edge of the inclined cone 322 is provided with a chamfer 323, the chamfer 323 enables the inner wall of the workpiece to be machined to smoothly slide over the inclined cone 322, and the workpiece to be machined is conveniently sleeved on the top column 32. The inclined cone 322 has a step 31 between the outer side wall and the top of the lower hemisphere 33. The step 33 connects the top post 32 to the lower hemisphere 31, and when the workpiece to be machined covers the step 33 and the upper surface of the top post 32 and the side thereof, the port to be machined is attached to the port of the water injection rod 2 more closely.

Please refer to FIG. 2 and FIG. 9. In an embodiment of the present invention, after a desired condition is formed in an oil cylinder connected to the adapter plate 1, the pipe orifice of the to-be-machined part is connected to one end of the water injection rod 3 through the steering hard top head 2. The steering hard top head 2 is rotated to deviate from the axis by a certain angle in the water injection rod 3, and the expansion type medium is installed on the water injection rod 3 through the steering hard top head 3 3 at a certain angle in the steering hard top head 2 5. The pressure between the workpiece and the workpiece die is slowly unloaded until the unloading is finished, the machined part die cavity is opened, the machined part is taken out, and the expansion process is completed. Since the force of the sealing ring 4 can return the steering hard top head 3 to the initial position, the axial direction of the steering hard top head 3 and the axial direction of the water injection rod 2 are in a coaxial state, and the next expansion process is awaited.

To FIGS 2 and 9, in the embodiment of the present invention, the seal ring 4 is embedded in the steering hard top head 3 and located at the bottom of the opening 32 of the top pillar 321, and the seal ring 4 fits the upper surface of the lower hemisphere 31 such that the seal ring 4 is in the middle of the bolt 5 head and the knuckle head 3. The sealing ring 4 is used for improving the space sealing between the steering hard top head 3 and the to-be-machined part and is simple in sealing structure.

As shown 9, the bolt 5 of the hollow structure is inserted into the center axis of the steering hard top head 3 such that the tail of the bolt 5 is located in the through hole 31 and the column hole 313 of the lower hemisphere 314, and the head of the bolt 5 is engaged in the opening 32 of the top pillar 321. The bolt 5 is provided with first holes 51 through which first holes 51 penetrate the center axis of the bolt 5, first holes 51 for inputting liquid to the inside of the workpiece to be machined. The bolt 5 may be, for example, a hexagonal flange bolt, and the bolt 5 is used to fasten the steering hard top head 3 with the water injection rod 2.

To FIG. 1, FIG. 5 and FIG. 9, in one embodiment of the present invention, the adapter plate 1, the water injection rod 2, the steering hard ejection head 3, the seal ring 4, and the bolt 5 are combined to form a water injection rod assembly. The water injection rod assembly drives the end face close to the workpiece to be machined via the oil cylinder, so that the axial direction of the steering hard top head 3 and the water injection rod 2 are in a coaxial state. The top pillar 3 of the steering hard top head 32 is introduced into the pipe wall of the workpiece to be machined, and the step 3 of the steering hard top head 33 gradually adheres to the pipe end of the workpiece to be machined as the oil cylinder continues to advance.

In addition, when the water injection rod 2 is formed into a proper sealing position, the pressurizing device injects the liquid into the blank pipe 21 through the water injection nozzle 2, and the liquid flows through 5 holes first of the bolt 51.

As shown 9. When the pipe end of the to-be-machined part is in an inclined state, the step 3 of the steering hard top head 3 can automatically adjust the axial direction and the steering hard top head 0 - 10° can be automatically adjusted. 3. The steering hard top head 5° can be automatically adjusted by 6°, 7°, 8°, 3, and the steering hard top head 7°. 33 3 can be automatically adjusted to the maximum angle range of the workpieces to be machined to achieve the sealing condition, and meanwhile, the local compression ratio is larger. 4 Furthermore, the integral sealing performance of the water injection rod assembly is improved.

Please refer 1 and FIG. 10. In one embodiment of the present invention, the oil cylinder drives the water injection rod 2 so that the steering hard top head 3 is inserted into an end opening part of a to-be-machined part requiring a high-pressure expansion type, and the oil cylinder feeding position is adjusted so that the lower hemisphere 3 of the steering hard top head 31 is fully attached to the inner wall and the end part to be machined. The high-pressure liquid is injected into the water injection rod 21 through the water injection nozzle 2 through the high-pressure pipeline, and the inner part of the to-be-machined part is fully applied to the molding die cavity to finish expansion of the to-be-machined part. Step.

Please refer 1, FIG. 9 and FIG. 10, in another embodiment of the present invention, since L-type to-be-machined part needs to be increased in an inclined state before expanding L type to be machined, L type of workpiece to be machined is in an inclined state, so that the raised area L of L type to be machined is cracked, and the concave area A of L B type to be machined is wrinkled.

As shown 10, the end surface of the steering hard top head L automatically adjusts the axial direction according to the actual conditions of the material component and the internal stress of L to be machined, so as to increase the thickness of the pipe wall 3 to treat the workpiece. L. The inner side of 10 mm-shaped workpiece to be machined is increased to L to prevent the bulging area 3 mm A from cracking phenomenon and wrinkle phenomenon in the concave area B L.

To 1, FIG. 9, and FIG. 10, in another embodiment of the present invention, since S-type workpieces to be machined are before the expansion process, a bend is also required to be increased in the prost order. When the water injection rod assembly rises S type to be machined, the pipe end opening of S type to be machined after the return bend is in an inclined state, causing S type ports to be machined to have oblique openings, so that the bulging region S of A type to be machined has a cracking phenomenon and S type of sunken area B to be machined is wrinkled.

As shown 10, the end face of the steering hard top head S automatically adjusts the axial direction according to the actual conditions of the material component and the internal stress of S to be machined, so as to increase the thickness of the pipe wall 3 to treat the workpiece. S, to prevent the bulging area 10 mm from cracking. The concave area S generates a wrinkle phenomenon S in accordance with the actual conditions of the material A component and the internal stress of B the 3 mm-type workpiece to be machined.

To sum up, the invention provides a water injection rod assembly which is simple and simple in sealing structure, and the manufacturing cost and the production cost are reduced. The device is provided with a steering hard top head with an adjustable angle, and can meet the machining shape of a to-be-machined part and enhance the sealing effect of the port to be machined. The device can automatically adjust the feeding amount of the inner and outer sides according to the internal stress of the material to be machined, and solves the phenomenon of wrinkling of the workpieces to be processed and the external cracking phenomenon in the expanding process of the to-be-machined parts.

The preferred embodiments of the present invention disclosed above are merely used to help explain the present invention. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , Many modifications and variations can be made in light of the present specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, and thus enable those skilled in the art to understand and utilize the present invention well. The invention is limited only by the claims and their full scope and equivalents.