Lower material ejecting device of press machine and using method of lower material ejecting device

Abstract

The invention discloses a lower material ejecting device of a press machine and a using method of the lower material ejecting device. The lower material ejecting device comprises a machine body, a power mechanism, a transmission mechanism and a material ejecting mechanism. The power mechanism is arranged on the outer side of the machine body; the transmission mechanism is respectively connected with the power mechanism and the ejection mechanism; the material jacking mechanism is integrally arranged in the machine body, protrudes out of the upper end of the machine body to be in contact with a forge piece, and penetrates out of one side of the machine body to be connected with the transmission mechanism; the power mechanism and the transmission mechanism are arranged on the outer side of the machine body, so that long-term pollution of waste liquid and waste oil is avoided, daily cleaning and maintenance are facilitated, the risks of faults and accidental shutdown caused by pollution are reduced, meanwhile, most structures of the material ejecting mechanism are arranged in the machine body, and the material ejecting mechanism is convenient to use. The occupation of the external space of the machine body is avoided, the utilization efficiency of the space is improved, the pollution risk of waste liquid and waste oil is also reduced, and the production efficiency and the economic benefit are remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of forging lower ejection equipment, and more specifically, relates to a press lower ejection device and a use method thereof. Background Art

[0002] The lower ejector device of the press is an important part of the forming process, mainly used to assist in the demoulding process of the workpiece. It is usually installed under the mold. When the workpiece is formed, the ejector device will eject the workpiece from the mold to facilitate the removal of the finished product or semi-finished product and prepare for the next forming cycle. At present, the lower ejector device is mainly divided into two types: hydraulic and pneumatic. Among them, the hydraulic lower ejector device is mainly composed of a power cylinder and an ejector rod. The power cylinder drives the ejector rod to complete the ejection action. It can provide stable and adjustable ejection force to ensure the precise control of the forging during the forming process. It is suitable for large workpieces or applications that require high-precision control. Therefore, it is widely used in various industrial production fields.

[0003] In the prior art, a Chinese patent with document number CN209465642U discloses a lower ejector device for a CNC electric screw press, comprising an ejector bracket, a hydraulic cylinder, a lower ejector plate, and a lower ejector mechanism connected between the cylinder rod of the hydraulic cylinder and the lower ejector plate. The technical key points are: the lower ejector mechanism comprises an ejector crossbeam hinged with the cylinder rod of the hydraulic cylinder and moving in a vertical direction under the drive of the hydraulic cylinder, a lower support plate fixed to the upper surface of the ejector crossbeam, a lower ejector rod group whose lower end contacts the upper surface of the lower support plate and whose upper end passes through the upper support plate of the ejector bracket, an upper support plate fixed to the upper end of the lower ejector rod group, an upper ejector rod group located above the upper support plate and fixedly connected to the lower surface of the lower ejector plate, an upper guide sleeve fixed to the lower surface of the lower pad plate of the press and corresponding to each upper ejector rod of the upper ejector rod group, and a lower guide sleeve fixed to the upper support plate of the ejector bracket and corresponding to each lower ejector rod of the lower ejector rod group.

[0004] The lower ejection device of the above patent has a reasonable structure, reliable use, stable ejection action, good ejection effect, and can eject forgings at multiple positions in one stroke. However, it still does not solve some problems existing in the existing hydraulic lower ejection device: (1) The power cylinder is placed on the bottom of the machine body. During the die forging process, waste liquid and waste oil on the work table flow down along the top hole, which may cause the surface of the power cylinder to be covered with oil stains, thereby affecting the use of the lower ejection device; (2) The power cylinder is usually placed in a pit, which makes it inconvenient to install and maintain later. At the same time, if the water in the pit is not cleaned up in time, the power cylinder will be soaked in oil stains, making it impossible to remove the installation screws, and even causing the piston rod to be contaminated and rusted and unable to be returned, thereby affecting the mold life and product quality. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a lower ejection device for a press machine and a method for using the same. By arranging the power mechanism and the transmission mechanism on the outside of the machine body, they are protected from long-term contamination by waste liquid and waste oil, and are convenient for daily cleaning and maintenance, thereby reducing the risk of failure and unexpected shutdown due to contamination. At the same time, most of the structure of the ejection mechanism is arranged inside the machine body, avoiding the occupation of the external space of the machine body, improving the utilization efficiency of the space, reducing the risk of contamination by waste liquid and waste oil, and significantly improving production efficiency and economic benefits.

[0006] In order to achieve the above-mentioned object, the present invention provides a press bottom ejection device on one hand, comprising: a machine body, a power mechanism, a transmission mechanism and an ejection mechanism, wherein:

[0007] The upper surface of the fuselage is adapted to the forging die, and grooves are provided on both sides of the fuselage in the connection area with the ejection mechanism;

[0008] The power mechanism is arranged outside the fuselage;

[0009] The transmission mechanism is respectively connected to the power mechanism and the ejecting mechanism;

[0010] The ejector mechanism is integrally arranged inside the fuselage, protrudes from the upper end of the fuselage to contact the forging, and passes through one side of the fuselage to connect with the transmission mechanism;

[0011] The power mechanism and the transmission mechanism are arranged outside the fuselage to avoid long-term contamination by waste liquid and waste oil. Meanwhile, most of the structure of the ejecting mechanism is arranged inside the fuselage to further reduce the contamination risk of waste liquid and waste oil.

[0012] Furthermore, the power mechanism includes: a mounting seat, a power cylinder, an upper limit stroke control switch and a lower limit stroke control switch; the power cylinder is arranged on the outside of the fuselage through the mounting seat; the upper limit stroke control switch and the lower limit stroke control switch are arranged on the outside of the fuselage and on the same side of the fuselage as the power cylinder.

[0013] Furthermore, the upper limit stroke control switch and the lower limit stroke control switch include non-contact stroke control switches such as photoelectric switches, magnetic induction switches or inductive proximity switches.

[0014] Furthermore, the transmission mechanism includes: a first connecting member, a first rocker arm, a connecting rod and a second rocker arm; one end of the first rocker arm is connected to the end of the push rod of the power cylinder through the first connecting member, and the other end is connected to the connecting rod through the first connecting member; the other end of the connecting rod is connected to the second rocker arm through the first connecting member.

[0015] Furthermore, the first connecting member includes a connecting component such as a pin or a connecting bolt.

[0016] Furthermore, the transmission mechanism includes at least one group of extension components consisting of the connecting rod and the second rocker arm.

[0017] Furthermore, the ejection mechanism includes: a driving shaft, a shaft sleeve, a roller seat, a roller, a roller shaft and a ejector rod; the driving shaft passes through one side of the fuselage and is respectively connected to the first rocker arm and the second rocker arm, and is rotatably connected to both sides of the fuselage; the roller seat is arranged on the outside of the driving shaft, and includes two ear plates; the roller shaft is connected to the roller seat through the two ear plates; the roller sleeve is arranged on the outside of the roller shaft between the two ear plates and is rotatably connected to the roller shaft; one end of the ejector rod is connected to the roller, and the other end thereof passes through the fuselage through a through hole provided at the upper end of the fuselage.

[0018] Furthermore, the driving shaft is connected to the first swing rod and the second swing rod respectively through expansion sleeves.

[0019] Furthermore, the driving shaft is rotatably connected to both sides of the fuselage through a shaft sleeve;

[0020] The heights of the plurality of driving shafts are the same.

[0021] Another aspect of the present invention provides a method for using a lower ejection device of a press machine, which is implemented by using the lower ejection device as described above, and comprises the following steps:

[0022] S1: Clean the machine body table and surrounding areas, and check and confirm that the lower ejection device is operating normally;

[0023] S2: After the forging die is placed on the upper end of the fuselage table, the push rod of the power cylinder extends outward from the cylinder body, driving the first swing rod to rotate, and driving the second swing rod to rotate synchronously through the connecting rod, thereby respectively causing the connected driving shafts to rotate;

[0024] S3: The rotation of the driving shaft drives the roller seat and the roller shaft to rotate with it, so that the roller rotatably connected to the roller shaft and the ejector rod fixedly connected to the roller move upward, and then the ejector rod ejects the forging to complete the ejection operation. At the same time, the lower limit stroke control switch detects the end of the push rod of the power cylinder and controls the power cylinder to stop extending the push rod further outward;

[0025] S4: After the ejector forging and the forging die are removed, the power cylinder starts to retract the push rod, and drives the first swing rod and the second swing rod to rotate in the opposite direction, and makes the roller and the push rod move downward and reset through the driving shaft, the roller seat and the roller shaft, and stops the retracting movement of the push rod of the power cylinder when the upper limit stroke control switch detects the end of the push rod of the power cylinder;

[0026] S5: Repeat steps S2 to S4 until all forgings are ejected, and then clean the fuselage table and surrounding areas.

[0027] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0028] 1. The lower ejection device of the present invention stably fixes the power cylinder on one side of the fuselage through the mounting seat, thereby ensuring the stability and reliability of the power cylinder during operation. At the same time, the upper limit stroke control switch and the lower limit stroke control switch are used to monitor the end stroke of the push rod of the power cylinder, so that the push rod operates within a predetermined stroke range, thereby realizing the control of the ejection operation, preventing mechanical damage or workpiece damage that may be caused by excessive stroke, ensuring the consistency and repeatability of the ejection process, helping to reduce material waste, and improving production efficiency, while also reducing energy consumption and maintenance costs.

[0029] 2. The lower ejection device of the present invention stably fixes the power cylinder on one side of the fuselage through the mounting seat, thereby ensuring the stability and reliability of the power cylinder during operation. At the same time, the upper limit stroke control switch and the lower limit stroke control switch are used to monitor the end stroke of the push rod of the power cylinder, so that the push rod operates within a predetermined stroke range, thereby realizing the control of the ejection operation, preventing mechanical damage or workpiece damage that may be caused by excessive stroke, ensuring the consistency and repeatability of the ejection process, helping to reduce material waste, and improving production efficiency, while also reducing energy consumption and maintenance costs.

[0030] 3. The lower ejection device of the present invention connects the power cylinder through the first rocker arm to stably transmit the ejection force generated by the extension and contraction of the push rod to other components, reducing the impact and vibration that may be caused by the traditional direct connection method, thereby extending the service life of the mechanical components. At the same time, the setting of the first rocker arm also helps to achieve a more flexible force transmission angle, so that the mechanical design can be more compact, save space, and avoid pollution. Secondly, the ejection force is extended forward through the extension component composed of the connecting rod and the second rocker arm, so that the uniform distribution and effective transmission of force are achieved, which effectively improves the stability of the ejection operation and helps to achieve more precise control, so that the ejection force can act on the target component more accurately.

[0031] 4. The lower ejection device of the present invention drives the two groups of ejection mechanisms to perform ejection operations through the first rocker arm and the second rocker arm respectively, thereby realizing bilateral synchronous ejection through the linkage mechanism of the rocker arm, ensuring the balance and stability in the ejection process, and at the same time, simplifying the mechanical structure, improving the ejection efficiency, and enhancing the reliability of the system. In addition, through the combined use of the roller and the ejection rod, the ejection action is softer and more controllable, avoiding the damage to the material that may be caused by direct impact.

[0032] 5. The lower ejection device of the present invention ensures a stable connection by connecting the driving shaft to the first rocker arm and the second rocker arm respectively through a clamping sleeve, and can adjust the upper limits of the ejection heights of several ejection rods respectively through the clamping sleeve and manual rotation of the driving shaft, thereby improving the adaptability of the lower ejection device to different ejection operations and improving the practicability of the lower ejection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front view of the lower ejection device according to an embodiment of the present invention;

[0034] Figure 2 It is a side view of the lower ejection device according to an embodiment of the present invention;

[0035] Figure 3 The present invention is a schematic diagram of the steps of the method for using the lower ejection device according to an embodiment of the present invention.

[0036] In all the drawings, the same figure marks represent the same technical features, specifically: 1-body, 2-mounting seat, 3-power cylinder, 4-first connecting piece, 5-upper limit stroke control switch, 6-lower limit stroke control switch, 7-first rocker arm, 8-expansion sleeve, 9-driving shaft, 10-connecting rod, 11-second rocker arm, 12-sleeve, 13-roller seat, 14-roller, 15-roller shaft, 16-top rod. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a press lower ejection device, including: a body 1, a power mechanism, a transmission mechanism and an ejection mechanism; the power mechanism is arranged outside the body 1; the transmission mechanism is respectively connected to the power mechanism and the ejection mechanism; the ejection mechanism is arranged inside the body 1 as a whole, protrudes from the upper end of the body 1 to contact the forging, and passes through one side of the body 1 to connect with the transmission mechanism. In actual use, by arranging the power mechanism and the transmission mechanism outside the body 1, they are protected from long-term contamination by waste liquid and waste oil, and are convenient for daily cleaning and maintenance, thereby reducing the risk of failure and unexpected shutdown caused by contamination. At the same time, most of the structure of the ejection mechanism is arranged inside the body 1, avoiding the occupation of the external space of the body 1, improving the utilization efficiency of the space, and reducing the pollution risk of waste liquid and waste oil, significantly improving production efficiency and economic benefits.

[0039] Specifically, Figure 1 and Figure 2 As shown, the upper surface of the fuselage 1 is adapted to the forging die, and grooves are provided on both sides of the fuselage 1 in the connection area with the ejection mechanism, which are used to stably support the forging die, the power mechanism, the transmission mechanism and the ejection mechanism, while preventing the transmission mechanism from being contaminated by waste liquid and waste oil, thereby reducing maintenance costs.

[0040] Preferably, the fuselage 1 is mainly made of rust-proof metal parts to adapt to the working environment, reduce maintenance costs and increase service life.

[0041] Specifically, Figure 1 and Figure 2 As shown, the power mechanism is arranged outside the fuselage 1 to provide a stable and adjustable ejection force to ensure accurate control of the forging during the forming process. The power mechanism includes: a mounting seat 2, a power cylinder 3, an upper limit stroke control switch 5 and a lower limit stroke control switch 6; wherein, the power cylinder 3 is arranged outside the fuselage 1 through the mounting seat 2; the upper limit stroke control switch 5 and the lower limit stroke control switch 6 are arranged outside the fuselage 1 and are arranged on the same side of the fuselage 1 as the power cylinder 3. In actual use, the power cylinder 3 is stably fixed to one side of the fuselage 1 through the mounting seat 2 to ensure the stability and reliability of the power cylinder 3 during operation. At the same time, the upper limit stroke control switch 5 and the lower limit stroke control switch 6 monitor the end stroke of the push rod of the power cylinder 3, so that the push rod runs within a predetermined stroke range, realizes the control of the ejection operation, prevents mechanical damage or workpiece damage that may be caused by excessive stroke, ensures the consistency and repeatability of the ejection process, helps to reduce material waste, improve production efficiency, and also reduces energy consumption and maintenance costs.

[0042] Preferably, the fuselage 1 and the mounting base 2, as well as the mounting base 2 and the power cylinder 3 are fixedly connected by bolts for stable fixation and convenience for subsequent maintenance and overhaul.

[0043] Preferably, the power cylinder 3 is stably connected to a nearby hydraulic pump station to realize the extension and retraction of the push rod at one end thereof. The hydraulic pump station is connected to the press control system. At the same time, the control system is communicatively connected to the upper limit stroke control switch 5 and the lower limit stroke control switch 6 to realize the operation process of regulating the lower ejecting device.

[0044] Preferably, the upper limit stroke control switch 5 and the lower limit stroke control switch 6 include non-contact stroke control switches such as photoelectric switches, magnetic induction switches or inductive proximity switches.

[0045] In an optional embodiment, the upper limit stroke control switch 5 and the lower limit stroke control switch 6 are both magnetic induction switches, and the operation status of the power cylinder 3 is controlled by the cooperation of a magnetic part provided at the end of the push rod of the power cylinder 3.

[0046] Specifically, Figure 1 and Figure 2 As shown, the transmission mechanism is connected to the power mechanism and the ejection mechanism respectively, and is used to stably transmit the power of the power cylinder to the ejection mechanism. The transmission mechanism includes: a first connecting member 4, a first swing rod 7, a connecting rod 10 and a second swing rod 11; one end of the first swing rod 7 is connected to the end of the push rod of the power cylinder 3 through the first connecting member 4, and the other end is connected to the connecting rod 10 through the first connecting member 4; the other end of the connecting rod 10 is connected to the second swing rod 11 through the first connecting member 4. During actual use, the power cylinder 3 is connected to the first rocker arm 7 to stably transmit the ejecting force generated by the extension and contraction of the push rod to other components, reducing the impact and vibration that may be caused by the traditional direct connection method, thereby extending the service life of the mechanical components. At the same time, the setting of the first rocker arm 7 also helps to achieve a more flexible force transmission angle, so that the mechanical design can be more compact, save space, and avoid pollution. Secondly, the ejecting force is extended forward through the extension component composed of the connecting rod 10 and the second rocker arm 11, so that the force is evenly distributed and effectively transmitted, which effectively improves the stability of the ejecting operation and helps to achieve more precise control, so that the ejecting force can act on the target component more accurately.

[0047] Preferably, the first connecting member 4 includes a connecting component such as a pin or a connecting bolt.

[0048] Preferably, the first rocker arm 7 is an arc-shaped push rod as a whole, and a first connecting hole for connecting the ejecting mechanism is provided in the middle thereof, and two second connecting holes are arranged in mirror symmetry with the first connecting hole, and the second connecting holes are connected to the first connecting member 4 for stably transmitting the ejecting force.

[0049] Preferably, one end of the second rocker arm 11 is provided with a third connecting hole for connecting to the ejecting mechanism, and the other end is provided with a fourth connecting hole adapted to the first connecting member 4 for extending the transmission mechanism.

[0050] Preferably, the transmission mechanism includes at least one group of extension components consisting of the connecting rod 10 and the second rocker rod 11, which is used to extend the transmission distance of the transmission mechanism and realize connection with multiple ejection mechanisms.

[0051] Specifically, Figure 1 and Figure 2 As shown, the ejection mechanism is integrally arranged inside the fuselage 1, protruding from the upper end of the fuselage 1 to contact the forging, and passing through one side of the fuselage 1 to connect with the transmission mechanism, so as to eject the forging from the forging die cavity in a cyclic and stable manner. The ejection mechanism comprises: a driving shaft 9, a shaft sleeve 12, a roller seat 13, a roller 14, a roller shaft 15 and an ejector rod 16; the driving shaft 9 passes through one side of the fuselage 1 and is respectively connected to the first swing rod 7 and the second swing rod 11, and is rotatably connected to both sides of the fuselage 1; the roller seat 13 is arranged outside the driving shaft 9, and comprises two ear plates; the roller shaft 15 is connected to the roller seat 13 through the two ear plates; the roller 14 is sleeved outside the roller shaft 15 between the two ear plates and is rotatably connected to the roller shaft 15; one end of the ejector rod 16 is connected to the roller 14, and the other end thereof passes through the fuselage 1 through the through hole provided at the upper end of the fuselage 1. During actual use, the two groups of the pushing mechanisms are driven by the first rocker arm 7 and the second rocker arm 11 to perform pushing operations, so that the synchronous pushing of the materials on both sides is realized through the linkage mechanism of the rocker arm, thereby ensuring the balance and stability in the pushing process. At the same time, the mechanical structure is simplified, the pushing efficiency is improved, and the reliability of the system is enhanced. In addition, the combined use of the roller 14 and the pushing rod 16 makes the pushing action softer and more controllable, avoiding the damage to the materials that may be caused by direct impact.

[0052] Preferably, the driving shaft 9 is respectively connected to the first rocker arm 7 and the second rocker arm 11 through a clamping sleeve 8 to ensure a stable connection, and the upper limits of the lifting heights of several of the ejector rods 16 can be adjusted respectively through the clamping sleeve 8 and manual rotation of the driving shaft 9, thereby improving the adaptability of the lower ejection device to ejection operations at different heights and improving the practicality of the lower ejection device.

[0053] Preferably, the plurality of driving shafts 9 have the same height to ensure accurate operation of the jacking operation.

[0054] Preferably, the driving shaft 9 is rotatably connected to both sides of the fuselage 1 through a bushing 12, so as to reduce the friction between the driving shaft 9 and the fuselage 1, and at the same time, position the driving shaft 9 to ensure its running stability.

[0055] Preferably, a sealing ring is provided at the sliding connection between the ejector rod 16 and the upper surface of the fuselage 1 to prevent waste liquid and waste oil from falling into the interior of the fuselage 1, thereby reducing maintenance costs and ensuring the accuracy of ejection operations.

[0056] like Figure 3 As shown, another embodiment of the present invention provides a method for using a lower ejection device of a press, comprising the following steps:

[0057] S1: Clean the table top and surrounding area of ​​the machine body 1, and check and confirm that the lower ejection device is operating normally;

[0058] S2: After the forging die is placed on the upper end of the table of the fuselage 1, the push rod of the power cylinder 3 extends outward from the cylinder body, driving the first swing rod 7 to rotate, and driving the second swing rod 11 to rotate synchronously through the connecting rod 10, thereby respectively causing the connected driving shaft 9 to rotate;

[0059] S3: The rotation of the driving shaft 9 drives the roller seat 13 and the roller shaft 15 to rotate with it, so that the roller 14 rotatably connected to the roller shaft 15 and the push rod 16 fixedly connected to the roller 14 move upward, and then the push rod 16 pushes out the forging to complete the ejection operation. At the same time, the lower limit stroke control switch 6 detects the end of the push rod of the power cylinder 3 and controls the power cylinder 3 to stop continuing to extend the push rod outward;

[0060] S4: After the ejector forging and the forging die are removed, the power cylinder 3 starts to retract the push rod, and drives the first swing rod 7 and the second swing rod 11 to rotate in the opposite direction, and makes the roller 14 and the push rod 16 move downward and reset through the driving shaft 9, the roller seat 13 and the roller shaft 15, and stops the retracting movement of the push rod of the power cylinder 3 when the upper limit stroke control switch 5 detects the end of the push rod of the power cylinder 3;

[0061] S5: Repeat steps S2 to S4 until all forgings are ejected, and then clean the table top and surrounding areas of the fuselage 1.

[0062] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0063] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0064] In this patent, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art will readily understand that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A press bottom ejection device, characterized in that: include: A fuselage (1), a power mechanism, a transmission mechanism and a material ejection mechanism, wherein: The upper surface of the body (1) is adapted to the forging die, and grooves are provided on both sides of the body in the areas connected to the ejection mechanism; The power mechanism is arranged outside the fuselage (1); The transmission mechanism is respectively connected to the power mechanism and the ejecting mechanism; The ejection mechanism is integrally arranged inside the fuselage (1), protrudes from the upper end of the fuselage (1) to contact the forging, and passes through one side of the fuselage (1) to connect with the transmission mechanism; By arranging the power mechanism and the transmission mechanism outside the fuselage (1), they are protected from long-term contamination by waste liquid and waste oil. At the same time, most of the structure of the ejection mechanism is arranged inside the fuselage (1), further reducing the risk of contamination by waste liquid and waste oil.

2. The lower ejection device according to claim 1, characterized in that: The power mechanism comprises: a mounting seat (2), a power cylinder (3), an upper limit stroke control switch (5) and a lower limit stroke control switch (6); the power cylinder (3) is arranged on the outside of the machine body (1) through the mounting seat (2); the upper limit stroke control switch (5) and the lower limit stroke control switch (6) are arranged on the outside of the machine body (1) and are arranged on the same side of the machine body (1) as the power cylinder (3).

3. The lower ejection device according to claim 2, characterized in that: The upper limit stroke control switch (5) and the lower limit stroke control switch (6) include non-contact stroke control switches such as photoelectric switches, magnetic induction switches or inductive proximity switches.

4. The lower ejection device according to claim 2, characterized in that: The transmission mechanism comprises: a first connecting member (4), a first swing rod (7), a connecting rod (10) and a second swing rod (11); one end of the first swing rod (7) is connected to the end of the push rod of the power cylinder (3) through the first connecting member (4), and the other end is connected to the connecting rod (10) through the first connecting member (4); the other end of the connecting rod (10) is connected to the second swing rod (11) through the first connecting member (4).

5. The lower ejection device according to claim 4, characterized in that: The first connecting member (4) comprises a connecting component such as a pin or a connecting bolt.

6. The lower ejection device according to claim 4, characterized in that: The transmission mechanism includes at least one group of extension components consisting of the connecting rod (10) and the second rocker rod (11).

7. The lower ejection device according to claim 4, characterized in that: The ejection mechanism comprises: a driving shaft (9), a shaft sleeve (12), a roller seat (13), a roller (14), a roller shaft (15) and an ejector rod (16); the driving shaft (9) passes through one side of the machine body (1) and is respectively connected to the first swing rod (7) and the second swing rod (11), and is rotatably connected to the two sides of the machine body (1); the roller seat (13) is arranged on the outside of the driving shaft (9), and comprises two ear plates; the roller shaft (15) is connected to the roller seat (13) through the two ear plates; the roller (14) is sleeved on the outside of the roller shaft (15) between the two ear plates and is rotatably connected to the roller shaft (15); one end of the ejector rod (16) is connected to the roller (14), and the other end thereof passes through the machine body (1) through a through hole provided at the upper end of the machine body (1).

8. The lower ejection device according to claim 7, characterized in that: The driving shaft (9) is respectively connected to the first swing rod (7) and the second swing rod (11) via a tightening sleeve (8).

9. The lower ejection device according to claim 8, characterized in that: The driving shaft (9) is rotatably connected to both sides of the fuselage (1) via a shaft sleeve (12) The plurality of driving shafts (9) have the same height.

10. A method for using a lower ejection device of a press machine, which is implemented by using the lower ejection device according to any one of claims 1 to 9, characterized in that: The steps include: S1: Clean the table top and surrounding area of ​​the machine body (1), and check and confirm that the lower ejection device is operating normally; S2: After the forging die is placed on the upper end of the table of the machine body (1), the push rod of the power cylinder (3) extends outward from the cylinder body, driving the first swing rod (7) to rotate, and driving the second swing rod (11) to rotate synchronously through the connecting rod (10), thereby respectively causing the connected driving shaft (9) to rotate; S3: The rotation of the driving shaft (9) drives the roller seat (13) and the roller shaft (15) to rotate with it, so that the roller (14) rotatably connected to the roller shaft (15) and the push rod (16) fixedly connected to the roller (14) move upward, and then the push rod (16) pushes out the forging to complete the ejection operation. At the same time, the lower limit stroke control switch (6) detects the end of the push rod of the power cylinder (3) and controls the power cylinder (3) to stop continuing to extend the push rod outward; S4: After the ejector forging and the forging die are removed, the power cylinder (3) starts to retract the push rod, and drives the first swing rod (7) and the second swing rod (11) to rotate in the opposite direction, and through the driving shaft (9), the roller seat (13) and the roller shaft (15), the roller (14) and the push rod (16) are reset downward, and when the upper limit stroke control switch (5) detects the end of the push rod of the power cylinder (3), the retracting movement of the push rod of the power cylinder (3) is stopped; S5: Repeat steps S2 to S4 until all forgings are ejected, and then clean the machine body (1) table and surrounding areas.

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