A hot header concave die ejection device

Abstract

The utility model relates to a hot header female die ejection device, including the frame, the female die rear section is fixedly connected with the frame upside, the female die rear section is opened in and has the open behind the top rod assembly hole, the top rod assembly hole is slidably provided with the top rod, the top rod rear end extends out the top rod assembly hole, the frame is rotatably connected with the swing arm, the swing arm upper end is equipped with the stroke column on the top rod position near, the stroke column front end is used for with the top rod rear end abuts, the swing arm is fixedly connected with the internal thread sleeve outside the stroke column, the stroke column is screwed on the internal thread sleeve, be equipped with the drive mechanism for pushing the swing arm and swing on the frame, the utility model discloses through simple rotation stroke column can realize the accurate regulation of top rod ejection length, need not to replace the spare part or stoppage and removal, convenient operation, response is quick.

Description

Technical Field

[0001] This utility model relates to the field of hot upsetting machine technology, and in particular to a hot upsetting machine die ejection device. Background Technology

[0002] In the hot upsetting process, a hot upsetting machine applies pressure to a metal blank placed in a die using a punch, causing it to plastically deform at high temperatures and ultimately form the blank. After forming, the workpiece needs to be ejected from the die so that it can be clamped and transferred to the next process or removed from the die area. For this purpose, hot upsetting machines are usually equipped with a die ejection device, which generally includes an ejector pin and a drive mechanism. The ejector pin moves axially along the die to push the workpiece out.

[0003] Existing die ejection devices mostly employ mechanical drive structures, such as using cams, connecting rods, or rocker arms to move the ejector pin. However, these devices generally suffer from a technical drawback: the ejection stroke (i.e., ejection length) of the ejector pin is fixed or inconvenient to adjust. Since different specifications or types of workpieces require different ejection distances after molding, if the ejection stroke is too short, the workpiece cannot completely detach from the die, easily causing jamming or clamping failure; if the stroke is too long, it may cause interference between the ejector pin and the mold or other components, even leading to equipment damage or affecting the stability of equipment operation.

[0004] Although some existing devices attempt to change the stroke by replacing the push rod or adjusting the connecting parts, such methods are cumbersome and time-consuming, making it difficult to adapt to the rapid changeover requirements of multi-variety, small-batch production models.

[0005] Therefore, there is an urgent need to provide a hot upsetting machine die ejection device with a reasonable structure, convenient adjustment and precise control of ejection stroke, so as to meet the needs of flexible adjustment of ejection length in the production process of different products, and improve the equipment versatility and production efficiency. Utility Model Content

[0006] This utility model proposes a hot forging die ejection device that can adjust the ejection length of the ejector rod, thus solving the above-mentioned problems existing in the use of the prior art.

[0007] The technical solution of this utility model is implemented as follows: A hot forging die ejection device includes a frame, a rear section of the die is fixedly connected to the upper side of the frame, a rearward-facing ejector rod assembly hole is opened in the rear section of the die, an ejector rod is slidably disposed in the ejector rod assembly hole, the rear end of the ejector rod extends out of the ejector rod assembly hole, a swing arm is rotatably connected to the frame, a stroke column is provided at the upper end of the swing arm near the ejector rod, the front end of the stroke column is used to abut against the rear end of the ejector rod, an internal threaded sleeve is fixedly connected to the outside of the swing arm on the stroke column, the stroke column is threadedly connected to the internal threaded sleeve, and a drive mechanism for pushing the swing arm to swing is provided on the frame.

[0008] Preferably, a support seat is fixedly connected to the front end of the stroke column, and the support seat has an arc-shaped abutment for abutting against the rear end of the push rod.

[0009] Preferably, the drive mechanism includes a cam rotatably mounted on the frame, and a roller is rotatably connected to the lower end of the swing arm, the roller rolling and engaging with the outer contour of the cam.

[0010] Preferably, a reset sleeve is fixedly connected to the upper side of the rear section of the die, and a reset rod facing the upper end of the rocker arm is slidably connected to the reset sleeve. The reset sleeve is provided with a reset spring for pushing the reset rod towards the rocker arm, and the reset rod is used to push the upper end of the rocker arm away from the push rod.

[0011] Preferably, a roller seat is fixedly connected to one end of the reset rod facing the swing arm, a reset roller is rotatably connected to the roller seat, and the upper end of the swing arm has a roller mating arc surface on the side facing the roller, and the reset roller abuts against the roller mating arc surface.

[0012] Preferably, a retaining ring is fixedly connected to the outer wall of the reset sleeve, and the two ends of the reset spring abut against the roller seat and the retaining ring, respectively.

[0013] Preferably, the rear section of the die is fixedly connected to a guide sleeve on the ejector pin assembly hole, the ejector pin is slidably fitted on the guide sleeve, the rear end of the ejector pin is fixedly connected to a rear top plate, and an ejector pin return spring is provided between the rear top plate and the guide sleeve.

[0014] In summary, the beneficial effects of this utility model are as follows: 1. This utility model features an internal threaded sleeve on the swing arm, into which the stroke column is threadedly connected. This allows for stepless adjustment of the stroke column's extension length relative to the swing arm via rotation. When the swing arm oscillates under the action of the drive mechanism, the front end of the stroke column pushes the push rod to complete the ejection action. The actual pushing distance depends on the extension length of the stroke column. Therefore, precise adjustment of the push rod's extension length can be achieved simply by rotating the stroke column, without the need to replace parts or stop the machine for disassembly. Operation is convenient and responsive. This structure is particularly suitable for hot forging production lines that require frequent changes in product models, significantly improving equipment adaptability and production efficiency. Furthermore, the entire adjustment mechanism is integrated into the swing arm assembly, resulting in a compact structure and high reliability.

[0015] 2. This utility model adopts a drive mechanism that combines a cam and a roller, utilizing the rotational motion of the cam to convert the periodic oscillation of the swing arm. It features a simple structure, accurate action, and fast response, meeting the requirements of high-speed reciprocating operation of a hot forging machine. A reset mechanism consisting of a reset sleeve, a reset rod, and a reset spring is provided, which actively pushes the swing arm to reset after the drive mechanism is released, preparing for the next ejection action. A rear plate and a reset spring are installed at the rear end of the ejector rod, ensuring that the ejector rod can quickly and reliably reset automatically after the ejection action is completed. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram: 1. Frame; 2. Rear section of die; 21. Ejector pin assembly hole; 22. Guide sleeve; 3. Ejector pin; 31. Rear top plate; 32. Ejector pin return spring; 4. Swing arm; 41. Roller; 42. Roller mating arc surface; 43. Rotary shaft; 5. Stroke column; 51. Support seat; 52. Arc-shaped support head; 6. Internal threaded sleeve; 7. Cam; 81. Return sleeve; 82. Return rod; 83. Roller seat; 84. Return roller; 85. Return spring; 86. Support ring. Detailed Implementation

[0019] The following will refer to the appendix in the embodiments of this utility model. Figure 1 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Example: like Figure 1As shown, this utility model discloses a hot forging die ejection device, including a frame 1. A rear die section 2 is fixedly connected to the upper side of the frame 1. The rear die section 2 is part of the mold system and forms a complete forming cavity with the front die. An ejector pin assembly hole 21 with a rearward opening is provided axially inside the rear die section 2. This hole extends to the rear of the frame 1 and is used to assemble an ejector pin 3. The ejector pin 3 is a cylindrical rod-shaped structure, and its outer diameter slides in fit with the inner wall of the ejector pin assembly hole 21, ensuring that the ejector pin 3 can slide smoothly back and forth within the hole. The front end of the ejector pin 3 extends into the bottom of the die forming cavity to directly contact and eject the formed workpiece; the rear end extends out of the ejector pin assembly hole 21, exposed in the rear space of the frame 1, to receive external drive.

[0021] A swing arm 4 is rotatably connected to the frame 1 via a rotating shaft 43. The upper end of the swing arm 4 is positioned near the rear end of the push rod 3, and an internal threaded sleeve 6 is fixedly connected to its side near the push rod 3. The stroke column 5 is screwed into the internal threaded sleeve 6 through its outer circumference threads to achieve a threaded connection. By rotating the stroke column 5, its length extending from the internal threaded sleeve 6 can be adjusted, thereby changing the initial distance between its front end and the rear end of the push rod 3. A support seat 51 is welded and fixedly connected to the front end of the stroke column 5. The support seat 51 has an arc-shaped abutment 52 for abutting against the rear end of the push rod 3. The support seat 51 is made of alloy structural steel that has undergone high-frequency quenching. The front end of the stroke column 5 contacts the rear end of the push rod 3 through the arc-shaped abutment 52 of the support seat 51. When the swing arm 4 swings, it pushes the push rod 3 forward to achieve the ejection action.

[0022] To drive the swing arm 4 to swing, a drive mechanism is also provided on the frame 1. This drive mechanism includes a cam 7 driven to rotate by a motor (not shown in the figure), which is fixedly mounted on the frame 1. The cam 7 has a non-circular outer contour curve, which can generate periodic lift changes during its rotation. The lower end of the swing arm 4 is hinged to a roller 41 by a pin, and the outer edge of the roller 41 makes rolling contact with the outer contour surface of the cam 7. When the motor drives the cam 7 to rotate, the height change of the cam 7 profile drives the roller 41 to move up and down, thereby driving the swing arm 4 to swing back and forth around its central pivot point.

[0023] During the ejection process, when cam 7 rotates to its highest position, roller 41 is lifted, forcing the upper end of rocker arm 4 to swing forward (i.e., toward ejector rod 3). At this time, the front end of stroke column 5 abuts against the rear end of ejector rod 3 and pushes it forward, ejecting the workpiece from the die cavity. When cam 7 continues to rotate to its lowest position, roller 41 descends, and the upper end of rocker arm 4 swings back under the action of the reset mechanism, causing stroke column 5 to disengage from the thrust on ejector rod 3.

[0024] To ensure reliable reset of the rocker arm 4, a reset sleeve 81 is fixedly connected to the upper side of the rear section 2 of the die. A reset rod 82 facing the upper end of the rocker arm 4 is slidably connected to the reset sleeve 81. Furthermore, a reset spring 85 is provided on the reset sleeve 81 for pushing the reset rod 82 towards the rocker arm 4. The reset rod 82 is used to push the upper end of the rocker arm 4 away from the push rod 3.

[0025] Specifically, a roller seat 83 is fixedly connected to one end of the reset rod 82 facing the swing arm 4, and a reset roller 84 is rotatably connected to the roller seat 83. Correspondingly, the upper end of the swing arm 4 has a roller mating arc surface 42 on the side facing the roller 41, and the reset roller 84 abuts against the roller mating arc surface 42.

[0026] Specifically, the reset spring 85 is configured such that a retaining ring 86 is fixedly connected to the outer wall of the reset sleeve 81, and the two ends of the reset spring 85 abut against the roller seat 83 and the retaining ring 86 respectively.

[0027] When the swing arm 4 is not driven or is in the return state, the elastic force of the return spring 85 acts on the roller mating arc surface 42 through the return roller 84, forcing the upper end of the swing arm 4 away from the push rod 3.

[0028] Furthermore, a guide sleeve 22 is fixedly connected to the ejector pin assembly hole 21 in the rear section 2 of the die cavity, and the ejector pin 3 slides on the guide sleeve 22. The guide sleeve 22 improves the straightness and stability of the ejector pin 3's movement. The rear ejector plate 31 is located behind the guide sleeve 22. An ejector pin return spring 32 is provided between the rear ejector plate 31 and the guide sleeve 22. The spring is sleeved on the outer periphery of the ejector pin 3, and its two ends abut against the rear end faces of the rear ejector plate 31 and the guide sleeve 22, respectively. When the external thrust disappears, the ejector pin return spring 32 pushes the rear ejector plate 31 to move backward, causing the ejector pin 3 to quickly return to its initial position, completing the reset.

[0029] In actual operation, the operator can pre-rotate the stroke column 5 according to the required ejection length of different workpieces, and adjust the length of its extension beyond the internal thread sleeve 6 to set the maximum ejection stroke. When the hot forging machine is running, the cam 7 rotates synchronously with the main shaft. Each revolution drives the swing arm 4 to complete one swing, which in turn drives the stroke column 5 to push the ejector rod 3 to complete one ejection action. After ejection, the cam 7 enters the low point area, and the return spring 85 pushes the return roller 84 to press the swing arm 4 to return it to its original position. At the same time, the ejector rod return spring 32 also pulls the ejector rod 3 back to its original position, ready for the next cycle.

[0030] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", 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 utility model 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 limiting the scope of protection of this utility model.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hot forging machine die ejection device, comprising a frame, characterized in that: The upper side of the frame is fixedly connected to a rear section of a die. The rear section of the die has a rearward-facing ejector pin assembly hole. An ejector pin is slidably disposed in the ejector pin assembly hole. The rear end of the ejector pin extends out of the ejector pin assembly hole. A swing arm is rotatably connected to the frame. The upper end of the swing arm has a stroke column near the ejector pin. The front end of the stroke column is used to abut against the rear end of the ejector pin. An internal threaded sleeve is fixedly connected to the outside of the stroke column of the swing arm. The stroke column is threaded onto the internal threaded sleeve. The frame is provided with a drive mechanism for pushing the swing arm to swing.

2. The hot heading machine die ejection device according to claim 1, characterized in that: The front end of the stroke column is fixedly connected to a support seat, and the support seat has an arc-shaped abutment for abutting against the rear end of the push rod.

3. The hot heading machine die ejection device according to claim 1, characterized in that: The drive mechanism includes a cam rotatably mounted on the frame, and a roller is rotatably connected to the lower end of the swing arm, the roller rolling and engaging with the outer contour of the cam.

4. A hot heading machine die ejection device according to claim 1 or 3, characterized in that: A reset sleeve is fixedly connected to the upper side of the rear section of the die. A reset rod is slidably connected to the reset sleeve toward the upper end of the rocker arm. A reset spring is provided on the reset sleeve for pushing the reset rod toward the rocker arm. The reset rod is used to push the upper end of the rocker arm away from the push rod.

5. The hot heading machine die ejection device according to claim 4, characterized in that: A roller seat is fixedly connected to one end of the reset rod facing the swing arm, and a reset roller is rotatably connected to the roller seat. The upper end of the swing arm has a roller mating arc surface on the side facing the roller, and the reset roller abuts against the roller mating arc surface.

6. The hot heading machine die ejection device according to claim 5, characterized in that: A retaining ring is fixedly connected to the outer wall of the reset sleeve, and the two ends of the reset spring abut against the roller seat and the retaining ring, respectively.

7. The hot heading machine die ejection device according to claim 3, characterized in that: The rear section of the die is fixedly connected to a guide sleeve on the ejector pin assembly hole. The ejector pin is slidably fitted on the guide sleeve. The rear end of the ejector pin is fixedly connected to a rear top plate. An ejector pin return spring is provided between the rear top plate and the guide sleeve.

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