An automatic forging press die front stop device

Abstract

This utility model discloses an automatic forging press die front stop device, relating to the field of forging presses. It includes a bed and a female die mounted on the bed. A stop assembly is provided at the discharge port of the female die. The stop assembly includes a vertically arranged connecting plate, which is driven and mounted inside the bed by a dual-axis parallelogram swing mechanism. The output shaft of the dual-axis parallelogram swing mechanism extends out of the bed and is coaxially fitted with a gear. A transmission shaft is positioned above the gear and slides horizontally on the outside of the bed via a support. The transmission shaft has transmission teeth that mesh with the gear. The front side of the transmission shaft extends out of the support and abuts against a cam, which is mounted on a clamping drive shaft. The beneficial effects of this utility model are: the clamping drive shaft, linked to the cam, drives the transmission shaft to reciprocate, causing the dual-axis parallelogram mechanism to swing, ensuring that the stop rod corresponding to the female die discharge port accurately stops the material and synchronizes with the clamping process, achieving reliable clamping of short workpiece blanks.

Description

Technical Field

[0001] This utility model belongs to the field of forging presses, and specifically relates to an automatic forging press die front stop device. Background Technology

[0002] Automatic forging presses, as core manufacturing equipment for fasteners, irregular parts and rolling elements, have been widely used in many key sectors of the national economy, such as electronic information, instrumentation, transportation, light industry and home appliances, aerospace and weapon manufacturing, thanks to their outstanding advantages such as high production efficiency, excellent material utilization, stable product quality and low energy consumption. They play an irreplaceable role in ensuring the production needs of various industries and promoting industrial upgrading.

[0003] In the actual production process of automatic forging presses, upsetting short parts is one of the common processes. However, current automatic forging presses have significant technical challenges in this process: after the blank of the short part is pushed out of the die, it needs to be quickly caught by a clamping mechanism and transferred to the next station for subsequent upsetting. However, due to the dimensional characteristics of the short part and the forging process, the blank is pushed out of the die at a relatively fast speed. Especially for high-speed automatic forging presses, the production pace is fast and the blank pushing speed is even higher. This places extremely high demands on the response speed and motion accuracy of the clamping mechanism. The clamps need to move at a rate exceeding the blank pushing speed to successfully catch the part.

[0004] In actual operation, the clamping mechanism often fails to meet the speed requirements, resulting in the blank material not being caught in time and falling into the finished product collection area. Because automatic forging presses generally have high productivity and large output, the falling blank material mixes quickly with the finished product, and since the two are similar in appearance and size, it is difficult to separate them efficiently and accurately. This not only leads to scrapped finished products and wasted raw materials but also seriously affects production efficiency and product quality stability. Utility Model Content

[0005] This utility model aims to solve the technical problem mentioned above and provides an automatic forging press die front stop device to address the aforementioned technical deficiencies. The clamping drive shaft, linked to a cam, reciprocates, causing a dual-axis parallelogram mechanism to swing. This ensures that the stop bar at the corresponding female die outlet accurately stops the material and synchronizes with the clamping process, achieving reliable clamping of short workpiece blanks.

[0006] The technical solution adopted by this utility model is as follows: An automatic forging press die front stop device is provided, including a bed and a female die mounted on the bed. A stop assembly is provided at the discharge port of the female die. The stop assembly includes a vertically arranged connecting plate, which is driven and installed inside the bed by a dual-axis parallelogram swing mechanism. The number and position of the connecting plates correspond to the female dies, and a stop rod is vertically fixedly installed at the free end of the connecting plate. The stop rod is coaxially arranged with the discharge port of the female die. The output shaft of the dual-axis parallelogram swing mechanism passes through the bed and is coaxially equipped with a gear. A transmission shaft is provided above the gear, and the transmission shaft is horizontally slidably mounted on the outside of the bed by means of a support. Transmission teeth that mesh with the gear are provided on the transmission shaft. The front side of the transmission shaft passes through the support and abuts against a cam, which is mounted on a clamping drive shaft. An elastic member is provided at the rear of the transmission shaft, and the elastic member is connected to the support.

[0007] The cam is mounted on the clamping drive shaft. After being driven to rotate, the outer contour of the cam contacts the drive shaft, thereby pushing the drive shaft to move horizontally. The elastic component at the rear of the drive shaft compensates for the contour changes of the cam during rotation, ensuring that the drive shaft and the cam are always in contact, eliminating transmission gaps, and preventing delays or malfunctions in the material stopping action due to contact failure. When the drive shaft reciprocates, the transmission teeth on it mesh with the gears on the output shaft of the dual-axis parallelogram swing mechanism, thereby causing the output shaft to rotate reciprocally and drive the dual-axis parallelogram swing mechanism to run, and causing the connecting plate and the material stop bar to swing. When the connecting plate and the material stop bar move to the discharge port, they stop the material, preventing the billet from falling and buying time for the clamp to catch the material. When the material stop bar is simultaneously withdrawn from the discharge port, the material avoidance is completed without affecting the transfer of the billet by the clamp, making it flexible in use.

[0008] To further optimize this technical solution, the output shaft of the dual-axis parallelogram swing mechanism is rotatably mounted inside the bed via a support, and a parallel shaft is arranged parallel to the output shaft, which is rotatably mounted on the support. The output shaft and the parallel shaft are respectively equipped with an active swing arm and a driven swing arm corresponding to the position and number of the stop rod. The active swing arm is fixedly mounted to the output shaft, and the driven swing arm is fixedly mounted to the parallel shaft. The free ends of the active and driven swing arms are rotatably hinged to the same connecting rod. The stop rod is fixedly mounted to the connecting rod.

[0009] By utilizing the parallel structure of the output shaft and the parallel shaft, and the corresponding arrangement of the active and driven swing arms, the active and driven swing arms are kept parallel during the movement of the dual-axis parallelogram swing mechanism. This achieves symmetrical swing of the stop bar, effectively preventing the stop bar from tilting during movement and ensuring the consistency of the stop position at each station.

[0010] To further optimize this technical solution, a roller bearing is rotatably mounted on the front side of the transmission shaft, and the roller bearing abuts against the cam.

[0011] By converting the direct sliding friction between the drive shaft and the cam into the rolling friction of the roller bearing, the contact wear between the two is greatly reduced, extending the service life of the cam and the drive shaft. At the same time, the transmission resistance is reduced, making the reciprocating sliding of the drive shaft smoother, avoiding delays in the material stopping action due to friction jamming, and ensuring the accuracy of the material stopping timing.

[0012] To further optimize this technical solution, the elastic component at the rear of the drive shaft is a spring, with one end of the spring abutting against the support and the other end connected to the drive shaft via a connector.

[0013] Choosing a spring as the elastic component has the advantages of low cost, easy availability, and stable reset performance.

[0014] To further optimize this technical solution, the connecting parts are nuts and washers distributed on the outer side of the drive shaft. The nuts are threaded to the drive shaft, the washers abut against the nuts, and the springs abut against the washers.

[0015] By rotating the nut to adjust the position of the washer, the compression of the spring can be changed, thus achieving flexible adjustment of the spring preload to adapt to the transmission requirements of different forging presses. The washer also increases the contact area between the nut and the spring, preventing the spring end from deforming due to excessive local force, extending the service life of the spring, and ensuring that the force exerted by the spring on the drive shaft is uniform, preventing the drive shaft from shifting due to force imbalance.

[0016] To further optimize this technical solution, a support shaft is coaxially connected to the rear side of the transmission shaft. The support shaft is slidably connected to the support on the outer side of the bed. Nuts and washers are both set on the support shaft, and springs are sleeved on the outer wall of the support shaft and abut against the support and washers respectively.

[0017] The support shaft provides a stable guide for the spring, preventing lateral displacement or twisting of the spring during compression and reset, ensuring that the spring's reset direction is consistent with the sliding direction of the drive shaft, improving transmission stability, and facilitating the assembly and maintenance of nuts and washers.

[0018] To further optimize this technical solution, at least two nuts are used, and at least one of them is an eccentric self-locking nut.

[0019] By using double nuts for locking, the single nut is prevented from loosening due to vibration. The addition of an eccentric self-locking nut utilizes its eccentric structure to generate an anti-loosening torque after tightening, enhancing the connection between the nut and the drive shaft. This prevents the nut from loosening due to long-term vibration and changes in spring preload, ensuring that the spring always maintains a stable reset effect and guaranteeing the reliability of the material blocking action.

[0020] To further optimize this technical solution, rotary bearings are fitted on the outer walls of the output shaft and the parallel shaft. The rotary bearings on the output shaft are fitted with the support and the bed, the rotary bearings on the parallel shaft are fitted with the support, and sliding bearings are fitted on the outer walls of the transmission shaft. The sliding bearings are fitted with the supports respectively.

[0021] The rotary bearings on the output shaft and parallel shaft can reduce the rotational friction between the output shaft and the support and bed, making the rotation of the output shaft and parallel shaft smoother. The sliding bearings on the transmission shaft can reduce the sliding friction between the transmission shaft and the support, reduce the wear of both, and at the same time ensure the sliding accuracy of the transmission shaft, avoid transmission lag due to excessive frictional resistance, and further improve the smoothness of the operation and service life of the entire device.

[0022] The beneficial effects of this utility model are as follows: 1. The connecting plate and the baffle rod are driven to swing by a dual-axis parallelogram swing mechanism. When the connecting plate and the baffle rod move to the discharge port, they stop the material to prevent the billet from falling and to buy time for the clamp to catch the material. When the baffle rod moves away from the discharge port at the same time, the material avoidance is completed and does not affect the clamp to transfer the billet. 2. The cam rotates synchronously with the clamping drive shaft. Combined with the roller bearing at the front end of the drive shaft, the rotational motion of the cam is converted into the horizontal linear motion of the drive shaft. The roller bearing can convert sliding friction into rolling friction, which greatly reduces the contact wear between the cam and the drive shaft, extends the service life of the components, reduces transmission resistance, and improves motion conversion efficiency. 3. The cam rotates synchronously with the clamping action and works with the spring to ensure that the drive shaft is always in close contact with the cam, achieving stable output of the horizontal reciprocating motion of the drive shaft. The spring preload is adjusted by the nut on the drive shaft (or support shaft). The spring compression can be adjusted by changing the position of the shim to ensure that the drive shaft is always in contact with the cam. At least one nut is an eccentric nut to prevent loosening and ensure transmission stability. The meshing of the drive shaft gear and the output shaft gear drives the output shaft to rotate precisely back and forth, making the material-stopping actions completely synchronized with the clamping process of the forging press, avoiding material-stopping failure caused by timing deviations. 4. When the drive shaft is driven to move back and forth, the transmission teeth on it mesh with the gears to drive the output shaft of the dual-axis parallelogram swing mechanism to rotate back and forth. The active swing rod fixed on its shaft swings synchronously. The swing of the active swing rod is transmitted to the driven swing rod through the connecting rod. Since the active swing rod, the driven swing rod on the parallel shaft, the connecting rod, the output shaft and the parallel shaft constitute a dual-axis parallelogram swing mechanism, the mechanism swings symmetrically and the stop rod swings smoothly, ensuring consistent posture and thus accurately stopping the material. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the automatic forging press die front stop device in this embodiment; Figure 2This is a schematic diagram of the drive structure of the clamping drive shaft and transmission shaft in this embodiment; Figure 3 This is a schematic diagram of the assembly structure of the output shaft and parallel shaft with the bed in this embodiment; Figure 4 This is a schematic diagram of the assembly structure of the drive shaft and spring in this embodiment; Figure 5 This is a schematic diagram of the assembly structure of the drive shaft and support shaft in this embodiment; Figure 6 This is a schematic diagram of the dual-axis parallelogram swing mechanism in this embodiment.

[0024] In the diagram, 1. Bed; 2. Female mold; 3. Connecting plate; 301. Stop bar; 4. Output shaft; 401. Gear; 402. Rotary bearing; 5. Parallel shaft; 6. Driving rocker arm; 7. Driven rocker arm; 8. Connecting rod; 9. Transmission shaft; 901. Transmission gear; 902. Roller bearing; 903. Sliding bearing; 10. Support; 11. Opening clamp drive shaft; 1101. Cam; 12. Spring; 13. Nut; 14. Washer; 15. Support shaft. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Please see the appendix Figure 1 Appendix Figure 3 Appendix Figure 6 An automatic forging press die front stop device includes a bed 1 and a female die 2 mounted on the bed 1. A stop assembly is provided at the discharge port of the female die 2. The stop assembly includes connecting plates 3 driven by a dual-axis parallelogram swing mechanism. The number and position of the connecting plates 3 correspond to the female dies 2. The output shaft 4 of the dual-axis parallelogram swing mechanism is rotatably mounted on the bed 1 via a support 10. A rotary bearing 402 is fitted on the output shaft 4, and the rotary bearing 402 is rotatably mounted to the support 10 to ensure smooth rotation of the output shaft 4. A parallel shaft 5 is arranged parallel to the output shaft 4 below it. 5 is rotatably mounted on support 10 via rotary bearing 402. The output shaft 4 and parallel shaft 5 are respectively provided with active rocker arm 6 and driven rocker arm 7 corresponding to the position and number of stop rod 301. Active rocker arm 6 is fixedly mounted to output shaft 4, and driven rocker arm 7 is fixedly mounted to parallel shaft 5. The free ends of active rocker arm 6 and driven rocker arm 7 are rotatably hinged to the same connecting rod 8. Stop rod 301 is fixedly mounted to connecting rod 8. One end of output shaft 4 extends out of bed 1, and output shaft 4 is assembled to bed 1 via rotary bearing 402 to ensure smooth rotation and is driven by drive structure. Please see the appendix Figure 1-3 and appendix Figure 5After the output shaft 4 passes through the bed 1, a gear 401 is coaxially mounted on it. A transmission shaft 9 is positioned above the gear 401, and transmission teeth 901 that mesh with the gear 401 are provided on the transmission shaft 9. The transmission shaft 9 is horizontally slidably positioned on the outside of the bed 1 by means of a support 10, and reciprocates along the support 10 by means of a reciprocating drive mechanism. The reciprocating drive mechanism includes a cam 1101 mounted on the opening drive shaft 11 of the automatic forging press. The front side of the transmission shaft 9 passes through the support 10 and abuts against the cam 1101, and the rear side is provided with an elastic member and connected to the support 10. When the cam 1101 is driven to run, after the distal end of the cam 1101 contacts the drive shaft 9, it pushes the drive shaft 9 backward. The drive shaft 9 meshes with the gear 401, thereby driving the output shaft 4 to rotate. At the same time, the elastic member undergoes elastic deformation. As the cam 1101 rotates, after the proximal end abuts against the drive shaft 9, the elastic member pushes the drive shaft 9 to maintain contact with the cam 1101. In order to reduce the contact wear between the cam 1101 and the drive shaft 9, a roller bearing 902 is rotatably mounted on the front end of the drive shaft 9, and the roller bearing 902 abuts against the cam 1101. Please see the appendix Figure 4 Appendix Figure 5 The elastic component can be a spring 12. One end of the spring 12 abuts against the support 10, and the other end is connected to the drive shaft 9 through a connector. The connector consists of a nut 13 and a washer 14 distributed on the outside of the drive shaft 9. The nut 13 is threaded to the drive shaft 9, and the spring 12 abuts against the washer 14. The spring 12 supports the washer 14 and the nut 13. The force of the spring 12 can be adjusted by adjusting the position of the nut 13 on the drive shaft 9. There are at least two nuts 13, at least one of which is an eccentric self-locking nut 13, so as to ensure the firmness of the connection of the nut 13 on the drive shaft 9 and ensure the operating effect of the spring 12. Please see the appendix Figure 5 A support shaft 15 is coaxially connected to the rear side of the drive shaft 9. The support shaft 15 is slidably connected to the support 10 on the outer side of the bed 1. Nuts 13 and washers 14 are both set on the support shaft 15. Spring 12 is sleeved on the outer wall of the support shaft 15 and abuts against the support 10 and the washers 14 respectively. There are at least two nuts 13 on the support shaft 15, and at least one of them is an eccentric nut 13, to ensure the firmness of the connection of the nuts 13 on the support shaft 15 and to ensure the support effect of the spring 12.

[0027] The working principle of the automatic forging press die front stop device is as follows: the power source of the stop assembly is bound to the opening drive shaft 11 of the automatic forging press. The cam 1101 mounted on the opening drive shaft 11 rotates synchronously with the opening action. Its contour surface alternately contacts the roller bearing 902 at the front end of the transmission shaft 9, thereby converting the rotational motion of the opening drive shaft 11 into the horizontal linear motion of the transmission shaft 9 along the outer support 10 of the bed 1. That is, when the distal end of the cam 1101 contacts the roller bearing 902, it pushes the transmission shaft 9 to move backward and pushes the spring 12 on the rear side of the transmission shaft 9 to elastically deform and store energy, thereby keeping the transmission shaft 9 in contact with the cam 1101. When the proximal end of the cam 1101 contacts the roller, the spring 12 pushes the transmission shaft 9 to slide forward, thereby converting the rotational motion of the transmission shaft 9 into horizontal reciprocating motion. When the drive shaft 9 reciprocates horizontally, its transmission gear 901 meshes with the gear 401 on the output shaft 4, thereby driving the output shaft 4 to rotate reciprocally. The active rocker arm 6 fixed on the shaft swings synchronously. The swing of the active rocker arm 6 is transmitted to the driven rocker arm 7 through the connecting rod 8. Since the active rocker arm 6, the driven rocker arm 7 on the parallel shaft 5, the connecting rod 8, the output shaft 4, and the parallel shaft 5 form a double-axis parallelogram swing mechanism, the mechanism swings symmetrically. When the output shaft 4 drives the active rocker arm 6 to swing towards the discharge port of the female mold 2, the connecting rod 8 drives the connecting plate 3 and the stop rod 301 to move to the discharge port to stop the material, preventing the blank from falling and giving the clamp time to catch the material. When the output shaft 4 drives the active rocker arm 6 to swing away from the discharge port, the stop rod 301 retracts synchronously to avoid the material, without affecting the clamp's transfer of the blank. In addition, the preload of the spring 12 is adjusted by the nut 13 on the drive shaft 9 (or support shaft 15). The compression of the spring 12 can be adjusted by changing the position of the shim 14, ensuring that the drive shaft 9 is always in contact with the cam 1101. At least one of the nuts 13 is an eccentric nut 13 to prevent loosening and ensure transmission stability.

Claims

1. A die front material blocking device of an automatic forging press, comprising a bed (1) and a female die (2) mounted on the bed (1), characterized in that: The discharge port of the female mold (2) is provided with a baffle assembly, which includes a vertically arranged connecting plate (3). The connecting plate (3) is driven and installed in the bed (1) by a dual-axis parallelogram swing mechanism. The number and position of the connecting plates (3) correspond to those of the female mold (2), and a baffle rod (301) is vertically fixedly installed on the free end of the connecting plate (3). The baffle rod (301) is coaxially arranged with the discharge port of the female mold (2). The output shaft (4) of the dual-axis parallelogram swing mechanism passes through the bed (1) and is coaxially equipped with gears. A drive shaft (9) is provided above the wheel (401) and gear (401). The drive shaft (9) is horizontally slidably disposed on the outside of the bed (1) by means of a support (10), and the drive shaft (9) is provided with a drive tooth (901) that meshes with the gear (401). The front side of the drive shaft (9) extends out of the support (10) and abuts against a cam (1101). The cam (1101) is mounted on the clamping drive shaft (11). An elastic member is provided at the rear of the drive shaft (9), and the elastic member is connected to the support (10).

2. An automatic forging press die front material blocking device according to claim 1, characterized in that: The output shaft (4) of the dual-axis parallelogram swing mechanism is rotatably mounted inside the bed (1) via a support (10), and a parallel shaft (5) is arranged parallel below the output shaft (4), which is rotatably mounted on the support (10). The output shaft (4) and the parallel shaft (5) are respectively provided with an active swing rod (6) and a driven swing rod (7) corresponding to the position and number of the stop rod (301). The active swing rod (6) is fixedly mounted to the output shaft (4), and the driven swing rod (7) is fixedly mounted to the parallel shaft (5). The free ends of the active swing rod (6) and the driven swing rod (7) are rotatably hinged to the same connecting rod (8). The stop rod (301) is fixedly mounted to the connecting rod (8).

3. An automatic forging press die front material blocking device according to claim 1, characterized in that: A roller bearing (902) is rotatably mounted on the front side of the drive shaft (9), and the roller bearing (902) abuts against the cam (1101).

4. An automatic forging press die front material blocking device according to claim 1, characterized in that: The elastic component at the rear of the drive shaft (9) is a spring (12). One end of the spring (12) abuts against the support (10), and the other end is connected to the drive shaft (9) by means of a connector.

5. An automatic forging press die front material blocking device according to claim 4, characterized in that: The connecting parts are a nut (13) and a washer (14) distributed on the outside of the drive shaft (9). The nut (13) is threaded to the drive shaft (9), the washer (14) abuts against the nut (13), and the spring (12) abuts against the washer (14).

6. The automatic forging press die front stop device according to claim 4, characterized in that: The drive shaft (9) is coaxially connected to a support shaft (15) on its rear side. The support shaft (15) is slidably connected to a support (10) on the outer side of the bed (1). Nuts (13) and washers (14) are both set on the support shaft (15). Springs (12) are sleeved on the outer wall of the support shaft (15) and abut against the support (10) and the washers (14) respectively.

7. An automatic forging press die front material blocking device according to claim 5, characterized in that: The nuts (13) are at least two, and at least one is an eccentric self-locking nut (13).

8. An automatic forging press die front material blocking device according to claim 1, characterized in that: Rotary bearings (402) are fitted on the outer wall of the output shaft (4) and the outer wall of the parallel shaft (5). The rotary bearings (402) on the output shaft (4) are fitted with the support (10) and the bed (1). The rotary bearings (402) on the parallel shaft (5) are fitted with the support (10). The outer wall of the transmission shaft (9) is fitted with sliding bearings (903). The sliding bearings (903) are fitted with the support (10) respectively.

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