Size control structure for neodymium iron boron powder press

Abstract

The utility model relates to a size control structure for a neodymium iron boron powder press, which comprises a die, a pressing assembly, a stroke measuring piece and a numerator connected with the stroke measuring piece, the die is provided with a die cavity, the pressing assembly is detachably connected to an external press, and the pressing assembly is matched with the die to press neodymium iron boron powder. A stroke measuring piece is arranged on one side of the pressing assembly, the stroke measuring piece is connected with the pressing assembly to acquire a stroke value and output the stroke value to the reading device, and the reading device displays the stroke value for an operator to read. And the conditions that the density of the pressed neodymium iron boron block is not uniform, when the stroke of the pressing head needs to be adjusted, it is difficult for operators to understand that the stroke of the pressing head needs to be adjusted and corrected by engineers one by one, and when the pressing specifications of products are different, more time needs to be consumed for replacing the mold, replacing the pressing head and adjusting the stroke of the pressing machine, and consequently the production efficiency is not high in the prior art are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of press molding, in particular to a size control structure for a NdFeB powder press. Background Art

[0002] The molding methods of NdFeB magnets include extrusion molding, injection molding and press molding, among which press molding is suitable for producing magnets with larger sizes.

[0003] In the related art, the pressing molding method mainly involves fixing an upper pressing head on a special press, placing NdFeB powder in the mold cavity of the molding mold, and then the upper pressing head penetrates into the mold cavity to apply pressure to the NdFeB powder and press it into the target size.

[0004] When NdFeB powder is pressed into NdFeB blocks, although the size of the NdFeB blocks can meet the target size, due to the uneven force on the upper and lower sides of the NdFeB powder during the pressing process of the upper pressing head, the internal density distribution of the pressed NdFeB blocks is uneven, affecting their application performance and even causing the defective rate to be higher than expected.

[0005] Before actual pressing, a pre-pressing operation is required. The depth of the ram is adjusted based on the size of the NdFeB blocks obtained during the pre-pressing operation. Adjusting the stroke of the dedicated press requires engineers to calibrate the stroke of the ram, a task difficult for operators to understand. In smaller processing plants, one engineer is often responsible for multiple machines. Under tight production schedules, engineers adjusting the stroke of the upper ram machine by machine is detrimental to efficient production.

[0006] In addition, when the product pressing specifications are different, it takes a lot of time to replace the mold, replace the pressing head, and adjust the press stroke, resulting in low production efficiency. Utility Model Content

[0007] In order to improve the problem in the related art that the density of the NdFeB blocks after pressing is uneven, when the pressure head stroke needs to be adjusted, it is difficult for the operators to understand, and engineers need to adjust and calibrate each device. When the product pressing specifications are different, it takes a lot of time to replace the mold, replace the pressure head, and adjust the press stroke, resulting in low production efficiency. The present application provides a size control structure for the NdFeB powder press to make the density distribution of the NdFeB blocks after pressing more uniform, avoid the need for multiple pressings to ensure the uniform density of the NdFeB blocks, reduce the defective rate, and facilitate the operators to understand and adjust the pressure head stroke, improve the efficiency of adjusting the pressure head stroke after pre-pressing, and thus improve production efficiency.

[0008] The present application provides a size control structure for a NdFeB powder press, which adopts the following technical solutions:

[0009] A size control structure for a NdFeB powder press includes a mold, a pressing assembly, a stroke measuring element, a processor connected to the stroke measuring element, and a digital indicator connected to the processor. The mold has a mold cavity, and the pressing assembly is detachably connected to an external press. The pressing assembly cooperates with the mold to press the NdFeB powder. A stroke measuring element is provided on one side of the pressing assembly. The stroke measuring element is connected to the pressing assembly to collect a stroke value and output it to the processor. The processor processes the stroke value, the mold height value, and the diameter value of the blank product obtained after pre-pressing to obtain a debugging value. The digital indicator displays the stroke value and the debugging value for an operator to read and debug the stroke of the press.

[0010] The pressing assembly includes mounting platforms provided on both sides of the mold and a pressing head unit detachably connected to the mounting platforms. The press is provided with output ends on both sides of the mold, and the mounting platforms are fixed to the output ends.

[0011] A T-slot is provided on the side of the mounting platform facing the mold, and the pressure head unit is slidably connected to the T-slot. A positioning piece is provided on one side of the pressure head unit, and the positioning piece is abutted against the side wall of the mounting platform. A positioning column is also provided on the end surface of the pressure head unit facing the mounting platform, and a positioning groove for the positioning column to be engaged is provided on the groove wall of the T-slot. The pressure head unit is provided with a control component on the same side of the positioning piece that drives the positioning column to enter or exit the positioning groove.

[0012] Optionally, the pressure head unit includes a connecting seat and a sub-pressure head screwed to the connecting seat, the connecting seat is slidably connected to the T-slot, and the positioning piece and the control assembly are fixed on the same side of the connecting seat;

[0013] The connecting seat is provided with a mounting groove on one side facing the mounting platform, a holding ring is fixed on the side wall of the mounting groove, and the positioning column is inserted into the holding ring and is slidably connected to the holding ring;

[0014] The control assembly includes a push plate slidably connected to the bottom wall of the mounting slot, one end of the push plate extends out of the mounting slot, and the other end of the push plate is detachably connected to the connecting seat. The push plate has an ejection block on the end face facing the positioning column, and the ejection block moves to the bottom of the positioning column to drive one end of the positioning column to insert into the positioning slot.

[0015] Optionally, an L-shaped limit baffle is provided on the side of the connecting seat away from the positioning piece, a clamping foot is provided on the side of the push plate away from the sub-pressure head, and the limit baffle is provided with a groove for the clamping foot to be engaged.

[0016] Optionally, the press includes a frame, the stroke measuring part includes a scale and two detection platforms slidably connected to the scale, one end of the scale is installed on the upper side of the frame, the detection platform corresponds to the mounting platform one by one, and a rigid connecting rod is connected between the detection platform and the corresponding mounting platform, so that the two detection platforms follow the corresponding mounting platform respectively, and the sub-pressing head has a corresponding reference position, so the stroke value represents the displacement of the sub-pressing head compared to the reference position after pressing.

[0017] Optionally, the stroke measuring component also includes a displacement sensor connected to the processor, the displacement sensor is installed on the frame and arranged vertically toward the detection platform, the displacement sensor collects the displacement of the detection platform, and the processor obtains the stroke value and the debugging value based on the preset ideal stroke value, the reference position and the displacement.

[0018] Optionally, a mold table is provided in the middle of the frame, and the mold can be detachably mounted on the mold table. The mold table is provided with a mounting hole for mounting the mold. A support table is provided on the lower side of the mold table, and a pressure block is provided on the upper side of the mold table. The support table and the pressure block cooperate to limit the mold in the vertical direction.

[0019] Optionally, a guide groove for the mold to be moved into is provided on the upper side of the mold platform, the guide groove is connected to the mounting hole, a column is provided on the bottom wall of the guide groove, the pressure block is screwed to the column, and a positioning nut is provided on the side of the column away from the bottom wall of the guide groove.

[0020] By adopting the above technical solution, after pre-pressing to obtain the rough product, the operator can directly read the debugging value and stroke value through the indicator and adjust the stroke of the press according to the debugging value. This is easy for the operator to understand and get started quickly. There is no need for engineers to debug the equipment one by one, which improves production efficiency.

[0021] When pressing products of different specifications and sizes, matching molds and sub-pressing heads are required. The operator can unlock the locking state between the press unit and the mounting table through the control component, and then move the press unit as a whole from the mounting table along the T-slot. The sub-pressing head screwed to the connecting seat can then be removed for replacement, which has the advantage of easy disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying any creative work.

[0023] Figure 1 It is a structural diagram of the size control structure of the NdFeB powder press.

[0024] Figure 2 This is an exploded view of the space between the pressure head unit and the mounting table.

[0025] Figure 3 It is an exploded view between the connection seat and the sub-pressure head.

[0026] Figure 4 This is a cross-sectional view of the pressure head unit.

[0027] Figure 5 yes Figure 4 Enlarged view of part A in the middle.

[0028] Figure 6 It is a structural diagram of the mold table, mold and tablet pressing.

[0029] Figure 7 It is a structural diagram of the mold platform from an upward perspective.

[0030] Figure 8 It is a structural diagram of the mounting platform when viewed from an upward angle.

[0031] In the figure: 1. mold; 2. counter; 3. mold cavity; 4. mounting table; 5. pressure head unit; 6. T-slot; 7. positioning plate; 8. positioning column; 9. positioning groove; 51. connecting seat; 52. sub-pressure head; 10. mounting groove; 11. holding ring; 12. push plate; 13. ejector block; 14. limit baffle; 15. clamping foot; 16. groove; 17. frame; 18. ruler; 19. detection table; 20. rigid connecting rod; 21. displacement sensor; 22. mold table; 23. mounting hole; 24. support table; 25. pressure block; 26. guide groove; 27. column; 28. positioning nut. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions of various embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The embodiment of the utility model provides a size control structure for NdFeB powder press, such as Figures 1 to 8As shown, it includes a mold 1, a pressing assembly, a stroke measuring piece, a processor connected to the stroke measuring piece, and a digital indicator 2 connected to the processor. The mold 1 has a mold cavity 3. The pressing assembly is detachably connected to an external press. The pressing assembly cooperates with the mold 1 to press the NdFeB powder. A stroke measuring piece is provided on one side of the pressing assembly. The stroke measuring piece is connected to the pressing assembly to collect a stroke value and output it to the processor. The processor processes the stroke value, the height value of the mold 1, and the diameter value of the blank product obtained after pre-pressing to obtain a debugging value. The digital indicator 2 displays the stroke value and the debugging value for the operator to read and debug the stroke of the press.

[0034] The pressing assembly includes mounting platforms 4 provided on both sides of the mold 1 and a pressing head unit 5 detachably connected to the mounting platforms 4. The press is provided with output ends on both sides of the mold 1, and the mounting platforms 4 are fixed to the output ends.

[0035] A T-slot 6 is provided on the side of the mounting platform 4 facing the mold 1, and the pressure head unit 5 is slidably connected to the T-slot 6. A positioning piece 7 is provided on one side of the pressure head unit 5, and the positioning piece 7 is abutted against the side wall of the mounting platform 4. A positioning column 8 is also provided on the end face of the pressure head unit 5 facing the mounting platform 4. A positioning groove 9 for the positioning column 8 to be engaged is provided on the groove wall of the T-slot 6. A control component for driving the positioning column 8 to enter or exit the positioning groove 9 is provided on the same side of the positioning piece 7 of the pressure head unit 5.

[0036] Specifically, in this embodiment, after pre-pressing to obtain the blank product, the indicator 2 directly displays the debugging value and the stroke value. The operator can adjust the stroke of the press according to the debugging value, which is easy for the operator to understand, quick to get started, and improves production efficiency.

[0037] Before the pressing operation, the ram unit 5 located at the lower side of the mold 1 enters the mold cavity 3. The ram unit 5 and the mold cavity 3 form a space for the operator to fill the powder. During the pressing process, the two ram units 5 press against each other to perform the pressing operation on the NdFeB powder.

[0038] When installing the pressure head unit 5 onto the mounting platform 4, the pressure head unit 5 is inserted along the T-slot 6 until the positioning piece 7 abuts against the outer wall of the mounting platform 4, and then the positioning column 8 is driven into the positioning groove 9 by the control component. The installation method is simple and fast; when disassembling the pressure head unit 5, the positioning column 8 is first driven out of the positioning groove 9 by the control component, and then the pressure head unit 5 is moved out of the T-slot 6, which has the advantage of quick disassembly.

[0039] In a preferred embodiment of the present invention, the pressure head unit 5 includes a connecting seat 51 and a sub-pressure head 52 screwed to the connecting seat 51, the connecting seat 51 is slidably connected to the T-slot 6, and the positioning piece 7 and the control assembly are fixed on the same side of the connecting seat 51;

[0040] The connecting seat 51 is provided with a mounting groove 10 on one side facing the mounting platform 4. A ring 11 is fixed to the side wall of the mounting groove 10. The positioning column 8 is inserted into the ring 11 and is slidably connected to the ring 11.

[0041] The control assembly includes a push plate 12 that is slidably connected to the bottom wall of the mounting groove 10, one end of the push plate 12 extends out of the mounting groove 10, and the other end of the push plate 12 is detachably connected to the connecting seat 51, and the push plate 12 has an ejection block 13 on the end face facing the positioning column 8, and the ejection block 13 moves to the bottom of the positioning column 8 to drive one end of the positioning column 8 to insert into the positioning groove 9.

[0042] Specifically, in this embodiment, when the push plate 12 slides along the mounting groove 10, the ejection block 13 moves accordingly. When the ejection block 13 is located beside the positioning column 8, the positioning column 8 naturally falls to the lower part of the push plate 12 under the action of its own gravity. The ejection block 13 pushes the positioning column 8 to be partially inserted into the positioning groove 9, thereby playing the role of a limiting connecting seat 51. When the positioning column 8 is located at the lower part of the push plate 12, the positioning column 8 exits the positioning groove 9.

[0043] Since the positioning post 8 is inserted into the holding ring 11 , the positioning post 8 can only slide in the vertical direction, thereby preventing the positioning post 8 from tilting and failing to fit into the positioning groove 9 in the machine.

[0044] In addition, the positioning column 8 bears less weight and is mainly subjected to radial shear force. In addition to guiding the positioning column 8 to move along its axial direction, the holding ring 11 also reduces the probability of the positioning column 8 breaking under the action of radial shear force, thereby protecting the positioning column 8.

[0045] In a preferred embodiment of the present invention, an L-shaped limit baffle 14 is provided on the side of the connecting seat 51 away from the positioning piece 7, and a clamping foot 15 is provided on the side of the push plate 12 away from the sub-pressure head 52, and the limit baffle 14 is provided with a groove 16 for the clamping foot 15 to be engaged.

[0046] Specifically, in this embodiment, when one end of the push plate 12 slides to the stop plate 14 and the latching foot 15 engages in the groove 16, the ejection block 13 moves to the bottom of the positioning post 8 to ensure that the positioning post 8 is inserted into the positioning groove 9, and the push plate 12 is engaged with the stop plate 14, preventing it from shifting. When the operator needs to release the locking state between the connecting seat 51 and the mounting platform 4, he can slightly bend the stop plate 14 away from the end of the mounting groove 10, and then move the push plate 12 in the opposite direction to disengage the latching foot 15 from the groove 16.

[0047] In a preferred embodiment of the present invention, the press includes a frame 17, the stroke measuring part includes a scale 18 and two detection platforms 19 slidably connected to the scale 18, one end of the scale 18 is installed on the upper side of the frame 17, the detection platform 19 corresponds to the mounting platform 4 one by one, and a rigid connecting rod 20 is connected between the detection platform 19 and the corresponding mounting platform 4, so that the two detection platforms 19 follow the corresponding mounting platform 4 respectively, and the sub-pressing head 52 has a corresponding reference position, so the stroke value represents the displacement of the sub-pressing head 52 compared to the reference position after pressing.

[0048] Specifically, in this embodiment, a rigid connecting rod 20 is provided to allow the detection platform 19 to follow the movement of the mounting platform 4. When the sub-indenter 52 is pressed downward, the detection platform 19 moves accordingly to collect the stroke value. The mounting platform 4 also has a small hole on the side facing the scale 18 for the rigid connecting rod 20 to be inserted.

[0049] In a preferred embodiment of the present invention, the stroke measuring component also includes a displacement sensor 21 connected to the processor, the displacement sensor 21 is installed on the frame 17 and is arranged vertically toward the detection platform 19, the displacement sensor 21 collects the displacement of the detection platform 19, and the processor obtains the stroke value and the debugging value according to the preset ideal stroke value, the reference position and the displacement.

[0050] Specifically, in this embodiment, the displacement sensor 21 is a non-contact laser displacement sensor 21. When the sub-pressing head 52 reaches a preset stroke, the displacement sensor 21 collects the displacement of the detection platform 19 and outputs it as a corresponding stroke value.

[0051] In a preferred embodiment of the present invention, a mold table 22 is provided in the middle of the frame 17, and the mold 1 can be detachably mounted on the mold table 22. The mold table 22 is provided with a mounting hole 23 for mounting the mold 1. A support table 24 is provided on the lower side of the mold table 22, and a pressure block 25 is provided on the upper side of the mold table 22. The support table 24 and the pressure block 25 cooperate to limit the mold 1 in the vertical direction.

[0052] Specifically, in this embodiment, when installing the mold 1, it is inserted along the mounting hole 23 and placed on the support 24, and then the pressing block 25 is adjusted so that the pressing block 25 is pressed against the surface of the mold 1, thereby improving the installation efficiency of the mold 1; when disassembling the mold 1, the pressing assembly is first returned to its initial position to make space, and then the pressing block 25 is adjusted so that the pressing block 25 is deflected to the side away from the mold 1, and then the mold 1 is moved out of the mounting hole 23, thereby improving the disassembly efficiency of the mold 1.

[0053] In a preferred embodiment of the present invention, a guide groove 26 for the mold 1 to move into is provided on the upper side of the mold platform 22, the guide groove 26 is connected to the mounting hole 23, a column 27 is provided on the bottom wall of the guide groove 26, the pressure block 25 is screwed to the column 27, and a positioning nut 28 is provided on the side of the column 27 away from the bottom wall of the guide groove 26.

[0054] Specifically, in this embodiment, after the mold 1 has been inserted into the mounting hole 23 , the pressing block 25 is rotated so that the pressing block 25 is partially located above the mold 1 , and then the positioning nut 28 is tightened so that the pressing block 25 presses the mold 1 to achieve the purpose of fixing the mold 1 .

[0055] In summary, after pre-pressing to obtain the rough product, the operator can directly read the debugging value and stroke value through the indicator 2 and adjust the stroke of the press according to the debugging value. This is easy for the operator to understand and get started quickly. There is no need for engineers to debug the equipment one by one, thereby improving production efficiency.

[0056] Depending on the size of the product, the shapes of the sub-pressing head 52 and the mold cavity 3 used are different, and they need to be replaced with matching mold 1 and sub-pressing head 52. The operator can unlock the locking state between the press unit 5 and the mounting platform 4 through the control component, and then move the press unit 5 as a whole out of the mounting platform 4 along the T-slot 6. Then, the sub-pressing head 52 screwed to the connecting seat 51 can be removed for replacement, which has the advantage of easy disassembly.

Claims

1. A size control structure for a NdFeB powder press, characterized by: The invention comprises a mold (1), a pressing assembly, a stroke measuring piece, a processor connected to the stroke measuring piece, and a digital indicator (2) connected to the processor, wherein the mold (1) has a mold cavity (3), the pressing assembly can be detachably connected to an external press, the pressing assembly cooperates with the mold (1) to press the NdFeB powder, a stroke measuring piece is provided on one side of the pressing assembly, the stroke measuring piece is connected to the pressing assembly to collect a stroke value and output it to the processor, the processor processes the stroke value, the height value of the mold (1), and the diameter value of the blank product obtained after pre-pressing to obtain a debugging value, and the digital indicator (2) displays the stroke value and the debugging value for an operator to read and debug the stroke of the press; The pressing assembly comprises mounting platforms (4) respectively arranged on both sides of the mold (1) and a pressing head unit (5) detachably connected to the mounting platforms (4); the press is provided with output ends on both sides of the mold (1), and the mounting platforms (4) are fixed to the output ends; The mounting platform (4) is provided with a T-shaped slot (6) on one side facing the mold (1); the pressure head unit (5) is slidably connected to the T-shaped slot (6); a positioning piece (7) is provided on one side of the pressure head unit (5); the positioning piece (7) abuts against the side wall of the mounting platform (4); a positioning column (8) is further provided on the end face of the pressure head unit (5) facing the mounting platform (4); a positioning slot (9) for the positioning column (8) to be engaged is provided on the slot wall of the T-shaped slot (6); and a control component for driving the positioning column (8) to enter or exit the positioning slot (9) is provided on the same side of the pressure head unit (5) as the positioning piece (7).

2. The size control structure according to claim 1, characterized in that: The pressure head unit (5) comprises a connecting seat (51) and a sub-pressure head (52) screwed to the connecting seat (51); the connecting seat (51) is slidably connected to the T-slot (6); the positioning piece (7) and the control assembly are fixed on the same side of the connecting seat (51); The connecting seat (51) is provided with a mounting groove (10) on one side facing the mounting platform (4), a holding ring (11) is fixed on the side wall of the mounting groove (10), and the positioning column (8) is inserted into the holding ring (11) and is slidably connected to the holding ring (11); The control assembly includes a push plate (12) slidably connected to the bottom wall of the mounting groove (10), one end of the push plate (12) extends out of the mounting groove (10), and the other end of the push plate (12) is detachably connected to the connecting seat (51), and the push plate (12) has an ejection block (13) facing the end surface of the positioning column (8), and the ejection block (13) moves to the bottom of the positioning column (8) to drive one end of the positioning column (8) to insert into the positioning groove (9).

3. The size control structure according to claim 2, characterized in that: An L-shaped limiting baffle (14) is provided on the side of the connecting seat (51) away from the positioning piece (7), and a clamping foot (15) is provided on the side of the push plate (12) away from the sub-pressing head (52). The limiting baffle (14) is provided with a groove (16) for the clamping foot (15) to be clamped.

4. The size control structure according to claim 3, characterized in that: The press comprises a frame (17), the stroke measuring part comprises a scale (18) and two detection platforms (19) slidably connected to the scale (18), one end of the scale (18) is mounted on the upper side of the frame (17), the detection platform (19) corresponds to the mounting platform (4) one by one, a rigid connecting rod (20) is connected between the detection platform (19) and the corresponding mounting platform (4), and the two detection platforms (19) respectively follow the corresponding mounting platform (4), the sub-pressing head (52) has a corresponding reference position, and the stroke value represents the displacement of the sub-pressing head (52) compared to the reference position after pressing.

5. The size control structure according to claim 4, characterized in that: The stroke measuring component further includes a displacement sensor (21) connected to the processor, the displacement sensor (21) being mounted on the frame (17) and arranged vertically toward the detection platform (19), the displacement sensor (21) collecting the displacement of the detection platform (19), and the processor obtaining the stroke value and the debugging value based on a preset ideal stroke value, the reference position, and the displacement.

6. The size control structure according to claim 5, characterized in that: A mold platform (22) is provided in the middle of the frame (17), and the mold (1) can be detachably mounted on the mold platform (22). The mold platform (22) is provided with a mounting hole (23) for mounting the mold (1). A support platform (24) is provided on the lower side of the mold platform (22), and a pressure block (25) is provided on the upper side of the mold platform (22). The support platform (24) and the pressure block (25) cooperate to limit the mold (1) in the vertical direction.

7. The size control structure according to claim 6, characterized in that: A guide groove (26) for the mold (1) to move into is provided on the upper side of the mold platform (22), the guide groove (26) is connected to the mounting hole (23), a column (27) is provided on the bottom wall of the guide groove (26), the pressure block (25) is screwed to the column (27), and a positioning nut (28) is provided on the side of the column (27) away from the bottom wall of the guide groove (26).

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