Feeding device of magnetic field forming press

Abstract

The magnetic field forming press feeding device comprises a skip car assembly, a guide rail assembly and a driving mechanism, the skip car assembly comprises a mounting frame, a supporting plate, a powder box and an opening and closing assembly, and the supporting plate is connected to the mounting frame in a liftable mode through a lifting air cylinder; the lifting air cylinder can drive the supporting plate to ascend and descend between the suspension position higher than the upper end face of the mold and the descending position attached to the upper end face of the mold, the powder box is slidably installed on the supporting plate, a discharging channel matched with a feeding port of the mold is formed in the supporting plate, and a discharging port of the powder box and the discharging channel are arranged in a staggered mode. The opening and closing assembly can drive the powder box to move to the discharging port of the powder box to align with the discharging channel. The guide rail assembly is used for guiding the skip car assembly to linearly move between the powder weighing device and the forming device; the driving mechanism is used for driving the skip car assembly to reciprocate between the powder weighing device and the forming device along the guide rail assembly. Through the arrangement, neodymium iron boron powder leakage can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of presses, and particularly to a feeding device for a magnetic field forming press. Background Art

[0002] The magnetic field forming press mainly includes a sealed frame. Inside the frame, a powder weighing device, a feeding device, and a forming device are installed. Neodymium iron boron powder first enters the powder weighing device through a feed hopper. After the powder weighing device weighs a certain amount of neodymium iron boron powder, it is loaded into the feeding device. Finally, it is pushed by the feeding device to the forming device, and the neodymium iron boron powder is loaded into the forming die, and then the neodymium iron boron powder is pressed into shape by the forming device.

[0003] Among them, the feeding device is mainly a material cart, which has a cavity for accommodating powder. An outlet is opened at the bottom of the material cart, and the outlet is flush with the surface of the material cart track. When transporting powder, the material cart loads the powder, and the outlet fits against the track surface to close the outlet through the track surface. The material cart is driven by a linear drive mechanism to move along the track. When the material cart walks above the die and the outlet aligns with the inlet of the die, the powder in the material cart falls into the die to complete the feeding of the die.

[0004] The above feeding device has the following problems: when the material cart runs relative to the surface of the material cart track, the powder in the material cart will leak to the track surface. On the one hand, it will cause waste of powder, resulting in the quantitative powder weighed by the powder weighing device not being accurately transferred into the inlet of the die, thus affecting the qualified rate of the finished product; on the other hand, the powder leaking to the track surface is not easy to clean, affecting the subsequent operation of the material cart. Summary of the Invention

[0005] The purpose of the present invention is to provide a feeding device for a magnetic field forming press. When the material cart assembly moves from the powder weighing device to the forming device, the support plate is in a suspended position, and when the discharge channel aligns with the inlet of the die, the lifting cylinder drives the support plate, the powder box, and the opening and closing assembly to descend synchronously until the support plate moves to the descending position, which can effectively reduce the leakage of neodymium iron boron powder. At this time, the driving mechanism drives the whole material cart assembly to reciprocate horizontally along the guide rail assembly to intermittently discharge powder, so as to ensure that the density of neodymium iron boron powder in the die is more uniform.

[0006] The above technical purpose of the present invention is achieved by the following technical solutions: a feeding device for a magnetic field forming press, used to transfer a certain amount of neodymium iron boron powder weighed by a powder weighing device into the die of a forming device, including The skip assembly, the skip assembly includes a mounting frame, a support plate, a powder box and an opening and closing assembly. The support plate is connected to the mounting frame in a liftable manner through a lifting cylinder. The lifting cylinder can drive the support plate to lift between a suspended position higher than the upper end surface of the mold and a lowered position fitting the upper end surface of the mold. The powder box is slidably mounted on the support plate, and the lower end surface of the discharge port of the powder box fits the upper end surface of the support plate. A discharge channel matching the feed port of the mold is provided on the support plate. The discharge port of the powder box is arranged in a dislocation manner with the discharge channel. The opening and closing assembly can drive the powder box to move to align the discharge port of the powder box with the discharge channel; The guide rail assembly is used to guide the skip assembly to linearly move between the powder weighing device and the molding device; The driving mechanism is used to drive the skip assembly to reciprocate between the powder weighing device and the molding device along the guide rail assembly; When the skip assembly moves from the powder weighing device to the molding device, the support plate is in the suspended position, and when the discharge channel is aligned with the feed port of the mold, the lifting cylinder drives the support plate, the powder box and the opening and closing assembly to synchronously descend until the support plate moves to the lowered position.

[0007] Further, the support plate includes a stainless steel plate and a wear-resistant plate fixedly connected to the lower end of the stainless steel plate. The lower end surface of the discharge port of the powder box fits the upper end surface of the stainless steel plate. The stainless steel plate and the wear-resistant plate cooperate to form a discharge channel.

[0008] Further, a plurality of tension springs are connected between the support plate and the mounting frame, and the tension springs are used to assist the support plate to maintain horizontal.

[0009] Further, a horizontally arranged guide bar is provided on the upper end surface of the support plate. A guiding portion guidingly cooperating with the guide bar is provided on the outer side of the powder box. The opening and closing assembly includes an opening and closing cylinder. The opening and closing cylinder is fixedly connected to the support plate, and the output end of the opening and closing cylinder is connected to the powder box through a connecting block.

[0010] Further, the discharge channel matches the shape of the discharge port of the powder box.

[0011] Further, an air shock device is connected to the side end of the powder box.

[0012] Further, an air gripper assembly and a demolding agent spraying assembly are connected to one end of the mounting frame close to the molding device. The air gripper assembly is used to grasp the molded workpiece in the mold, and the demolding agent spraying assembly is used to spray demolding agent on the feed port of the mold.

[0013] Further, a powder scraping plate is also connected to the mounting frame.

[0014] Further, the guide rail assembly is arranged as a telescopic guide rail. The fixed end of the telescopic guide rail is fixed in the box body of the molding press, and the telescopic end of the telescopic guide rail is fixedly connected to the mounting frame of the skip assembly.

[0015] Furthermore, the guide rail assembly includes one or more guide rail members arranged along a straight line. When there is one guide rail member, the guide rail member extends from the powder weighing device to above the mold of the forming device; when there are more than two guide rail members, the guide rail members extend continuously or intermittently from the powder weighing device to above the mold of the forming device, and the two or more guide rail members cooperate to form a running channel.

[0016] In summary, the present invention has the following beneficial effects: 1. In the feeding device of the magnetic field forming press of the present invention, when the material cart assembly moves from the powder weighing device to the forming device, the support plate is in a suspended position, and when the discharge channel is aligned with the feed port of the mold, the lifting cylinder drives the support plate, the powder box and the opening and closing assembly to descend synchronously until the support plate moves to the descending position, which can effectively reduce the leakage of NdFeB powder. At this time, the driving mechanism drives the material cart assembly as a whole to move back and forth along the guide rail assembly to discharge powder intermittently, thereby ensuring that the density of NdFeB powder in the mold is more uniform. Specifically, when the driving mechanism drives the material cart assembly as a whole to reciprocate in contact with the upper end surface of the mold, the discharge channel of the support plate and the feed port of the mold switch between overlap and offset. It should be noted that when the discharge channel of the support plate is offset from the feed port of the mold, the discharge channel area of ​​the support plate offset from the feed port of the mold is blocked by the upper end surface of the mold, thereby avoiding powder leakage; 2. In the feeding device of the magnetic field forming press of the present invention, due to the weight deviation between the left and right sides of the support plate, the support plate may be higher on one side and lower on the other side, thereby affecting the operation of the lifting cylinder. In the present invention, multiple sets of tension springs are connected between the mounting frame and the support plate, and the tension springs are used to assist the support plate to maintain horizontality, thereby ensuring the normal operation of the lifting cylinder; 3. In the magnetic field forming press feeding device of the present invention, the distance between the closed position and the open position of the powder box discharge port is shorter, so that less NdFeB powder remains in the powder box during the powder feeding process, thereby ensuring that the amount of NdFeB powder transferred to the mold is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the telescopic guide rail of the present invention when it is extended.

[0018] Figure 2 It is a schematic structural diagram of the telescopic guide rail of the present invention when it is partially retracted.

[0019] Figure 3 It is a schematic structural diagram of two guide rail members of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the material car assembly of the present invention.

[0021] Figure 5 It is a side schematic diagram of the skip assembly of the present invention.

[0022] Figure 6 It is a cross-sectional view of the skip assembly of the present invention.

[0023] Figure 7 It is a three-dimensional cross-sectional view of the skip assembly of the present invention.

[0024] In the figure: 10, skip assembly; 11, mounting frame; 12, support plate; 121, discharge channel; 122, stainless steel plate; 123, wear-resistant plate; 124, guide strip; 13, powder box; 131, air shock device; 132, discharge port; 14, opening and closing assembly; 15, lifting cylinder; 16, tension spring; 17, air gripper assembly; 18, demoulding agent spraying assembly; 19, powder scraping plate; 20, guide rail assembly; 21, guide rail part. Specific embodiments

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] As Figures 1 - 7 shown, a feeding device for a magnetic field forming press is used to transfer a fixed amount of neodymium iron boron powder weighed by a powder weighing device into a mold of a forming device. The feeding device includes a skip assembly 10, a guide rail assembly 20 and a driving mechanism, which constitute the basic structure of the present invention.

[0027] The skip assembly 10 includes a mounting frame 11, a support plate 12, a powder box 13 and an opening and closing assembly 14. The support plate 12 is connected to the mounting frame 11 in a liftable manner through a lifting cylinder 15. The lifting cylinder 15 can drive the support plate 12 to lift between a suspended position higher than the upper end face of the mold and a descending position fitting the upper end face of the mold. That is to say, under normal conditions, the skip assembly 10 is suspended above the mold, and the skip assembly 10 can reciprocate between the powder weighing device and the mold of the forming device. On the one hand, it can reduce the friction with the upper end face of the mold. On the other hand, since the skip assembly 10 moves reciprocally as a whole, the discharge port 132 of the powder box 13 remains closed during the reciprocating movement, that is, the discharge port 132 is misaligned with the discharge channel 121, so as to reduce the leakage of neodymium iron boron powder. The powder box 13 is slidably installed on the support plate 12, and the lower end face of the discharge port 132 of the powder box 13 fits the upper end face of the support plate 12. A discharge channel 121 matching the feed port of the mold is provided on the support plate 12. The discharge port 132 of the powder box 13 is misaligned with the discharge channel 121. The opening and closing assembly 14 can drive the powder box 13 to move until the discharge port 132 of the powder box 13 is aligned with the discharge channel 121.

[0028] The guide rail assembly 20 is used to guide the trolley assembly 10 to linearly move between the powder weighing device and the molding device; the driving mechanism is used to drive the trolley assembly 10 to reciprocate between the powder weighing device and the molding device along the guide rail assembly 20. The driving mechanism includes, but is not limited to, a lead screw mechanism. For example, it can also be a cylinder, which is not drawn in the present invention.

[0029] When the trolley assembly 10 moves from the powder weighing device to the molding device, the support plate 12 is in a suspended position. And when the discharge channel 121 is aligned with the feed port of the mold, the lifting cylinder 15 drives the support plate 12, the powder box 13 and the opening and closing assembly 14 to synchronously descend until the support plate 12 moves to the descending position. At this time, the opening and closing assembly 14 drives the powder box 13 to move from the closed position that blocks the discharge port 132 of the powder box 13 to the open position that conducts the discharge port 132 of the powder box 13, that is, from the position where the discharge port 132 is misaligned with the discharge channel 121 to the position where the discharge port 132 coincides with the discharge channel 121.

[0030] In some embodiments, the support plate 12 includes a stainless steel plate 122 and a wear-resistant plate 123 fixedly connected to the lower end of the stainless steel plate 122. The material of the wear-resistant plate 123 includes, but is not limited to, a tetrafluoroethylene plate. The lower end surface of the discharge port 132 of the powder box 13 is attached to the upper end surface of the stainless steel plate 122. The stainless steel plate 122 and the wear-resistant plate 123 cooperate to form a discharge channel 121. Specifically, a set of lifting cylinders 15 are respectively arranged around the mounting frame 11, and the output end of each set of lifting cylinders 15 is connected to the stainless steel plate 122. By arranging multiple sets of lifting cylinders 15, the smoothness of the lifting of the support plate 12 can be improved, and the wear-resistant plate 123 of the support plate 12 can reduce the friction with the upper end surface of the mold.

[0031] In some embodiments, multiple sets of tension springs 16 are connected between the support plate 12 and the mounting frame 11. The tension springs 16 are used to assist the support plate 12 to maintain horizontal. Specifically, two sets of tension springs 16 are respectively arranged on both sides of the mounting frame 11. One end of the tension spring 16 is connected to the mounting frame 11, and the other end of the tension spring 16 is connected to the support plate 12. Due to the weight deviation on the left and right sides of the support plate 12, the problem that one side of the support plate 12 is high and the other side is low will occur, which will affect the operation of the lifting cylinder 15. In the present invention, multiple sets of tension springs 16 are connected between the mounting frame 11 and the support plate 12, and the tension springs 16 are used to assist the support plate 12 to maintain horizontal, so as to ensure the normal operation of the lifting cylinder 15.

[0032] In some embodiments, a horizontally arranged guiding strip 124 is provided on the upper end surface of the supporting plate 12. The guiding strip 124 extends in the direction where the material outlet 132 of the powder box 13 coincides with the material outlet channel 121 of the supporting plate 12. A guiding portion that is guidingly engaged with the guiding strip 124 is provided on the outer side of the powder box 13. The opening and closing assembly 14 includes an opening and closing air cylinder. The opening and closing air cylinder is fixedly connected to the supporting plate 12, and the output end of the opening and closing air cylinder is connected to the powder box 13 through a connecting block. The guiding strip 124 functions to limit and guide, thereby defining the movement track of the powder box 13 and improving the stability of the powder box 13 during movement.

[0033] In some embodiments, the material outlet channel 121 matches the shape of the material outlet 132 of the powder box 13. This can avoid the residual neodymium iron boron powder on the supporting plate 12 and ensure that the neodymium iron boron powder in the powder box 13 can effectively enter the feed port of the mold through the material outlet channel 121.

[0034] In some embodiments, an air shock device 131 is connected to the side end of the powder box 13. The air shock device 131 can shake off the neodymium iron boron powder remaining on the inner wall of the powder box 13, thereby reducing the residual neodymium iron boron powder in the powder box 13.

[0035] In some embodiments, an air gripper assembly 17 and a demolding agent spraying assembly 18 are connected to one end of the mounting frame 11 close to the molding device. The air gripper assembly 17 is used to grasp the molded workpiece in the mold, and the demolding agent spraying assembly 18 is used to spray the demolding agent on the feed port of the mold. Specifically, the air gripper assembly 17 includes a gripper air cylinder and gripper arms arranged at both ends of the gripper air cylinder. The air gripper assembly 17 facilitates the blanking of the molded workpiece.

[0036] In some embodiments, a powder scraping plate 19 is further connected to the mounting frame 11. In the present invention, the powder scraping plate 19 is arranged between the air gripper assembly 17 and the demolding agent spraying assembly 18, and the powder scraping plate 19 is used to scrape flat the neodymium iron boron powder in the mold cavity.

[0037] In some embodiments, the guide rail assembly 20 is provided as a telescopic guide rail. The fixed end of the telescopic guide rail is fixed in the box body of the molding press, and the telescopic end of the telescopic guide rail is fixedly connected to the mounting frame 11 of the material cart assembly 10.

[0038] In some embodiments, the guide rail assembly 20 includes one or more than two guide rail members 21 arranged in a straight line. When there is one guide rail member 21, the guide rail member 21 extends from the powder weighing device to above the mold of the molding device; when there are more than two guide rail members 21, the guide rail members 21 extend from the powder weighing device continuously or intermittently to above the mold of the molding device, and an operation channel is formed by the cooperation among more than two guide rail members 21.

[0039] In summary, the present invention has the following beneficial effects: in the feeding device of the magnetic field forming press of the present invention, when the trolley assembly 10 moves from the powder weighing device to the forming device, the support plate 12 is in a suspended position, and when the discharge channel 121 is aligned with the feed port of the mold, the lifting cylinder 15 drives the support plate 12, the powder box 13 and the opening and closing assembly 14 to descend synchronously until the support plate 12 moves to the descending position, which can effectively reduce the leakage of NdFeB powder. At this time, the driving mechanism drives the trolley assembly 10 as a whole to reciprocate and move horizontally along the guide rail assembly 20 to intermittently discharge powder. At this time, the lower driving cylinder of the molding press will drive the mold to move downward gradually, so as to achieve a more uniform density of the NdFeB powder in the mold. Specifically, when the driving mechanism drives the trolley assembly 10 to reciprocate as a whole in contact with the upper end surface of the mold, the discharge channel 121 of the support plate 12 and the feed port of the mold switch between overlap and offset. It should be noted that when the discharge channel 121 of the support plate 12 is offset from the feed port of the mold, the discharge channel 121 area of ​​the support plate 12 that is offset from the feed port of the mold is blocked by the upper end surface of the mold, thereby avoiding powder leakage.

[0040] In the magnetic field forming press feeding device of the present invention, the distance between the closed position and the open position of the discharge port 132 of the powder box 13 is shorter, so that less NdFeB powder remains in the powder box 13 during the powder feeding process, thereby ensuring that the amount of NdFeB powder transferred to the mold is more accurate.

[0041] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A feeding device for a magnetic field forming press, used to transfer a quantitative amount of NdFeB powder weighed by a powder weighing device to a mold of a forming device, characterized in that: include The material cart assembly (10) comprises a mounting frame (11), a support plate (12), a powder box (13) and an opening and closing assembly (14). The support plate (12) is connected to the mounting frame (11) in a manner that it can be lifted and lowered by a lifting cylinder (15). The lifting cylinder (15) can drive the support plate (12) to be lifted and lowered between a suspended position higher than the upper end surface of the mold and a lowered position that is in contact with the upper end surface of the mold. The powder box (13) is slidably mounted on the support plate. (12) and the lower end surface of the discharge port (132) of the powder box (13) is in contact with the upper end surface of the support plate (12), a discharge channel (121) matching the feed port of the mold is provided on the support plate (12), the discharge port (132) of the powder box (13) and the discharge channel (121) are staggered, and the opening and closing assembly (14) can drive the powder box (13) to move until the discharge port (132) of the powder box (13) is aligned with the discharge channel (121); A guide rail assembly (20), the guide rail assembly (20) is used to guide the trolley assembly (10) to move linearly between the powder weighing device and the forming device; A driving mechanism, the driving mechanism is used to drive the trolley assembly (10) to move back and forth along the guide rail assembly (20) between the powder weighing device and the forming device; When the material cart assembly (10) moves from the powder weighing device to the molding device, the support plate (12) is in a suspended position, and when the discharge channel (121) is aligned with the feed port of the mold, the lifting cylinder (15) drives the support plate (12), the powder box (13) and the opening and closing assembly (14) to descend synchronously until the support plate (12) moves to the descending position.

2. A feeding device for a magnetic field forming press according to claim 1, characterized in that: The support plate (12) comprises a stainless steel plate (122) and a wear-resistant plate (123) fixedly connected to the lower end of the stainless steel plate (122); the lower end surface of the discharge port (132) of the powder box (13) is in contact with the upper end surface of the stainless steel plate (122); the stainless steel plate (122) and the wear-resistant plate (123) cooperate to form a discharge channel (121).

3. A feeding device for a magnetic field forming press according to claim 1, characterized in that: A plurality of tension springs (16) are connected between the support plate (12) and the mounting frame (11), and the tension springs (16) are used to assist the support plate (12) in maintaining horizontality.

4. A feeding device for a magnetic field forming press according to claim 1, characterized in that: The upper end surface of the support plate (12) is provided with a transversely arranged guide strip (124), the outer side of the powder box (13) is provided with a guide portion that cooperates with the guide strip (124) for guiding, and the opening and closing assembly (14) comprises an opening and closing cylinder, which is fixedly connected to the support plate (12), and the output end of the opening and closing cylinder is connected to the powder box (13) through a connecting block.

5. A feeding device for a magnetic field forming press according to claim 1, characterized in that: The shape of the discharge channel (121) matches that of the discharge port (132) of the powder box (13).

6. A feeding device for a magnetic field forming press according to claim 1, characterized in that: The side end of the powder box (13) is connected to a gas shock device (131).

7. A feeding device for a magnetic field forming press according to claim 1, characterized in that: An end of the mounting frame (11) close to the molding device is connected to an air gripper assembly (17) and a mold release agent spraying assembly (18), wherein the air gripper assembly (17) is used to grasp the molded workpiece in the mold, and the mold release agent spraying assembly (18) is used to spray the mold release agent on the feed port of the mold.

8. A feeding device for a magnetic field forming press according to claim 7, characterized in that: The mounting frame (11) is also connected to a powder scraping plate (19).

9. A feeding device for a magnetic field forming press according to any one of claims 1 to 8, characterized in that: The guide rail assembly (20) is configured as a telescopic guide rail, the fixed end of the telescopic guide rail is fixed in the box of the forming press, and the telescopic end of the telescopic guide rail is fixedly connected to the mounting frame (11) of the trolley assembly (10).

10. A feeding device for a magnetic field forming press according to any one of claims 1 to 8, characterized in that: The guide rail assembly (20) comprises one or more guide rail members (21) arranged along a straight line. When there is one guide rail member (21), the guide rail member (21) extends from the powder weighing device to above the mold of the molding device. When there are more than two guide rail members (21), the guide rail members (21) extend continuously or discontinuously from the powder weighing device to above the mold of the molding device. A running channel is formed between the two or more guide rail members (21).

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