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公开(公告)号：US5829568A
公开(公告)日：1998-11-03
申请号：US857737
申请日：1997-05-16
IPC分类号： B23Q11/00 , B21D5/01 , B21D5/02 , B21D7/02 , B21D7/024 , B23Q3/06 , B25B5/08 , F16P3/12 , B21D55/00
摘要： A tube bending machine having a rotatable bend die, a pressure die, a clamp die, an actuator and a controller. A clamp assembly holds the clamp die and includes a base, a clamp die holder which is spring biased away from and slideably engageable with the base. A spacer is also attached to the base and is moveable between positions. A gear rotatably mounted to the base is attached to a first and second cam by a shaft and the gear moves on a rack. The first cam is followed by a cam follower which moves to allow the spacer to change positions. The clamp die holder may move toward the housing in case the clamp die engages an obstruction, thus avoiding damage or injury to the obstruction. A second position of the spacer substantially blocks the space between the clamp die holder and the base, thus making a substantially rigid connection between them. The second position is used during the tube bending process. A microswitch senses the clamp die holder position and stops or opens the clamp die holder assembly if an obstruction is present. A set up mode is also provided by disengaging the gear from the rack and moving the spacer to the second position.
摘要翻译： 一种具有可旋转弯曲模具，压力模具，夹具模具，致动器和控制器的弯管机。 夹具组件夹持夹具，并包括基座，夹具模具保持器，其弹簧偏压远离可滑动地与基座接合。 间隔件也附接到基座并且可在位置之间移动。 可旋转地安装到基座的齿轮通过轴连接到第一和第二凸轮，齿轮在机架上移动。 第一凸轮之后是凸轮从动件，其移动以允许间隔件改变位置。 在夹具与接合障碍物接触的情况下，夹具模具座可朝向壳体移动，从而避免对障碍物的损伤或损伤。 间隔件的第二位置基本上阻挡了夹紧模座和底座之间的空间，从而在它们之间形成了基本刚性的连接。 在管弯曲过程中使用第二个位置。 如果存在障碍物，微动开关感测夹具模具座的位置并停止或打开夹具模具座组件。 还通过使齿轮与齿条脱离并将间隔件移动到第二位置来提供安装模式。
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公开(公告)号：US5617753A
公开(公告)日：1997-04-08
申请号：US540545
申请日：1995-10-06
CPC分类号： B21D7/024
摘要： A tube bending machine is provided which includes a rotatable bend die about which the tube is bent and a rotatable clamp die disposed outwardly of said bend die and movable to secure the tube between the clamp die and the bend die. A clamp die positioning system is provided which includes a drop-away clamp die holder supporting the clamp die, a hydraulic cylinder directly attached to the die clamp holder which advances and retracts the clamp die holder, and an electro-pneumatic control system which drives the cylinder at preselected pressures. The electro-hydraulic control system includes a hydraulic pump, a directional valve which varies the direction of flow of the hydraulic fluid to the cylinder, a proportional pressure reducing valve which varies the pressure of the hydraulic fluid, and a microprocessor controller which provides control signals to set the pressure to the preselected levels. The control also includes an encoder for providing the actual position of the clamp die to the controller which monitors a following error of the clamp die. The clamp die is moved from a retracted position to a position near a clamping position at a low pressure. If the clamp die encounters an obstacle, indicated by the following error increasing to a level above a predetermined level, it is automatically returned to the retracted position. Once the clamp die is near the clamping position, the pressure is increased to a required clamping pressure for the bend and the clamp die is moved to the clamping position.
摘要翻译： 提供了一种弯管机，其包括可旋转的弯曲模具，管弯曲在该模具上，以及设置在所述弯曲模具外侧的可旋转的夹具，并且可移动以将管固定在夹具模具和弯曲模具之间。 提供一种夹模定位系统，其包括支撑夹模的掉落夹模夹持器，直接附接到模夹夹持器的液压缸，其使夹模夹持器前进和后退;以及电动气动控制系统，其驱动 气瓶在预选压力下。 电液控制系统包括液压泵，改变液压流体与气缸的流动方向的方向阀，改变液压流体压力的比例减压阀，以及提供控制信号的微处理器控制器 将压力设定为预选水平。 该控制器还包括一个用于将夹具的实际位置提供给控制器的编码器，该控制器监测夹具的跟随误差。 夹紧模具从缩回位置移动到靠近压紧位置的位置处。 如果夹具遇到障碍物，由以下误差指示，增加到高于预定水平的水平，则其自动返回到缩回位置。 一旦夹紧模具接近夹紧位置，压力就会增加到弯曲所需的夹紧压力，夹具模具移动到夹紧位置。
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公开(公告)号：US5937687A
公开(公告)日：1999-08-17
申请号：US118632
申请日：1998-07-17
IPC分类号： B23Q11/00 , B21D5/01 , B21D5/02 , B21D7/02 , B21D7/024 , B23Q3/06 , B25B5/08 , F16P3/12 , B21D7/04
摘要： A tube bending machine having a rotatable bend die, a pressure die, a clamp die, an actuator and a controller. A clamp assembly holds the clamp die and includes a base, a clamp die holder which is spring biased away from and slideably engageable with the base. A spacer is also attached to the base and is moveable between positions. A gear rotatably mounted to the base is attached to a first and second cam by a shaft and the gear moves on a rack. The first cam is followed by a cam follower which moves to allow the spacer to change positions. The clamp die holder may move toward the housing in case the clamp die engages an obstruction, thus avoiding damage or injury to the obstruction. A second position of the spacer substantially blocks the space between the clamp die holder and the base, thus making a substantially rigid connection between them. The second position is used during the tube bending process. A first microswitch senses the clamp die holder position and stops or opens the clamp die holder assembly if an obstruction is present. A set up mode is also provided by disengaging the gear from the rack and moving the spacer to the second position.
摘要翻译： 一种具有可旋转弯曲模具，压力模具，夹具模具，致动器和控制器的弯管机。 夹具组件夹持夹具，并包括基座，夹具模具保持器，其弹簧偏压远离可滑动地与基座接合。 间隔件也附接到基座并且可在位置之间移动。 可旋转地安装到基座的齿轮通过轴连接到第一和第二凸轮，齿轮在机架上移动。 第一凸轮之后是凸轮从动件，其移动以允许间隔件改变位置。 在夹具与接合障碍物接触的情况下，夹具模具座可朝向壳体移动，从而避免对障碍物的损伤或损伤。 间隔件的第二位置基本上阻挡了夹紧模座和底座之间的空间，从而在它们之间形成了基本刚性的连接。 在管弯曲过程中使用第二个位置。 如果存在阻塞，第一微型开关感测夹具模具座的位置并停止或打开夹具模具座组件。 还通过使齿轮与齿条脱离并将间隔件移动到第二位置来提供安装模式。
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公开(公告)号：US5784913A
公开(公告)日：1998-07-28
申请号：US540064
申请日：1995-10-06
申请人： Ajay K. Bhandari
发明人： Ajay K. Bhandari
摘要： A machine for cold bending a thick walled tube is provided which includes a rotatable bend die around which the tube is bent and a pressure die which engages an outer side wall of the tube tangential to the bend. The pressure die has a pinch-type tube groove with multiple radiuses which receives the tube and substantially prevents relative movement between the pressure die and the outer side wall of the tube. The machine also includes a pressure die boost system which linearly advances the pressure die in a forward direction as the bend die is rotated. The boost system includes a linear actuator and an electro-hydraulic control system which automatically drives the linear actuator in accordance with a pre-programmed profile of pressure and flow parameters. The linear actuator has a hydraulic cylinder with a piston, a pusher coupling the piston to the pressure die, and ports in the cylinder on opposite sides of the piston. The electro-hydraulic control system has a hydraulic pump which provides hydraulic fluid to the cylinder, a proportional flow directional valve which varies flow of the hydraulic fluid from the hydraulic pump to each of the ports, a proportional pressure control valve which varies pressure of the hydraulic fluid in the cylinder, a sensor which detects a rotational angle of the bend die, and a microprocessor based controller. The controller receives a signal from the sensor representative of the rotational angle of the bend die and sends control signals to the valves to set the flow and pressure of the hydraulic fluid to pre-programmed levels at pre-programmed rotational angles of the bend die.
摘要翻译： 提供了一种用于冷弯的厚壁管的机器，其包括可旋转的弯曲模具，管弯曲在该模具周围;以及压力模具，其与管弯曲的切线的外侧壁接合。 压力模具具有多个半圆形的夹管式管槽，其接收管并且基本上防止压力模与管的外侧壁之间的相对运动。 该机器还包括一个压力模具升压系统，当压模旋转时，压力模具在向前方向上线性前进。 升压系统包括线性致动器和电液控制系统，其根据压力和流量参数的预编程轮廓自动驱动线性致动器。 线性致动器具有带有活塞的液压缸，将活塞连接到压力模的推动器以及活塞相对侧上的气缸中的端口。 电液控制系统具有向液压缸提供液压流体的液压泵，将液压泵从液压泵流向每个端口的比例流量换向阀，比例压力控制阀， 气缸中的液压流体，检测弯曲模具的旋转角度的传感器以及基于微处理器的控制器。 控制器从传感器接收代表弯管的旋转角度的信号，并向阀门发送控制信号，以将液压流体的流量和压力设定为预编程的水平，以预弯曲模具的旋转角度。
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5.发明授权
公开(公告)号：US5632176A
公开(公告)日：1997-05-27
申请号：US540065
申请日：1995-10-06
申请人： Ajay K. Bhandari
发明人： Ajay K. Bhandari
摘要： A tube bending machine is provided which includes a rotatable bend die about which the tube is bent, a mandrel insertable into the tube adjacent the bend, and a mandrel rod fixed to a rear end of the mandrel. A mandrel extractor system is also included which linearly advances and retracts the mandrel. The mandrel extractor system includes a linear actuator connected to the mandrel rod and an electro-hydraulic control system which automatically drives the linear actuator at variable pressures. The linear actuator includes a hydraulic cylinder with a piston connected to the mandrel rod. The electro-hydraulic control system includes a hydraulic pump which provides hydraulic fluid to the cylinder, a directional valve which selectively feeds the hydraulic fluid to opposite sides of the piston, a proportional pressure control valve which varies pressure of the hydraulic fluid, and a microprocessor based controller in electrical communication with the valves which provides control signals to vary the pressure of the hydraulic fluid. The controller is pre-programmed with several preselected pressure levels for the mandrel extractor. The tube is loaded over the mandrel while the mandrel is at a system pressure. The mandrel is moved within the tube at a very low pressure, below that of the system pressure, to the tangent point of the tube and the bend die. After reaching the tangent point, the mandrel pressure is increased back to the system pressure. During the bending operation, the mandrel pressure can be maintained at the system pressure or varied. At the end of the bend operation, the pressure is increased to a level above the system pressure to pull the mandrel out of the tube.
摘要翻译： 提供了一种管弯曲机，其包括可弯曲的弯曲模具，管弯曲在其周围，心轴可插入到邻近弯曲部的管中，以及芯棒，固定到心轴的后端。 还包括一个心轴提取器系统，其使线轴前进和缩回心轴。 心轴提取器系统包括连接到芯棒的线性致动器和电液控制系统，其可以以可变的压力驱动线性致动器。 线性致动器包括具有连接到芯棒的活塞的液压缸。 电动液压控制系统包括：液压泵，其向液压缸提供液压流体;选择性地将液压流体供给到活塞的相对侧的方向阀;改变液压流体压力的比例压力控制阀;以及微处理器 基于控制器与阀电连通，其提供控制信号以改变液压流体的压力。 控制器预先编程有多个预选的压力水平用于心轴提取器。 当心轴处于系统压力时，将管装载在心轴上。 心轴在管内以非常低的压力（低于系统压力的压力）移动到管和弯管的切点。 在达到切点之后，心轴压力增加回系统压力。 在弯曲操作期间，心轴压力可以保持在系统压力或变化。 在弯曲操作结束时，压力增加到高于系统压力的水平以将心轴从管中拉出。
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