Movable upper pressure head for forming magnetic steel

Abstract

The utility model discloses a magnetic steel forming movable upper pressing head which comprises a fixing plate and a fixing block fixed below the fixing plate, a pressing head is arranged below the fixing block, a movable cavity is arranged in the fixing block, a movable block capable of moving up and down is arranged in the movable cavity, the pressing head is connected to the movable block, and the pressing head is connected to the movable block. A first transverse pin is arranged above the movable block, a limiting groove is formed in the fixed block, the first transverse pin is arranged in the limiting groove in a penetrating mode, and the limiting groove is used for limiting the movement range of the first transverse pin. The movable pressing head is always pressed on the powder in the powder magnetizing motion by utilizing a spring mechanism, and the direction of the magnetic powder cannot be changed due to the micro-pressure of a spring.

Description

Technical Field

[0001] The utility model relates to the technical field of magnet steel forming, in particular to a movable upper pressure head for magnet steel forming. Background Art

[0002] The pressure head for magnet steel forming is a component in a forming device for producing magnetic materials. During the forming process, magnetic powder is put into a mold, and then pressure is applied through the upper pressure head to compact and form the powder in the mold. The pressure and shape of the upper pressure head directly affect the density, shape, and magnetic properties of the formed magnet steel.

[0003] In the prior art, the upper pressure head is fixed. During the forming process, the press drives the upper pressure head to run to the mold cavity to slightly press the powder by the upper oil cylinder, and then magnetization is carried out. During the magnetization process, the powder will have slight movement due to the change of the magnetic field. At this time, since the position of the oil cylinder is fixed, there will be a gap between the fixed pressure head and the powder, which will cause great changes in the product after sintering. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a movable upper pressure head for magnet steel forming. The movable pressure head uses a spring mechanism to always press the pressure head on the powder during the movement of powder magnetization. Since the slight pressure of the spring will not cause the movement direction of the magnetic powder.

[0005] To solve the above technical problem, a movable upper pressure head for magnet steel forming of the utility model includes a fixing plate and a fixing block fixed below it. A pressure head is arranged below the fixing block. An activity cavity is arranged in the fixing block. An activity block that can move up and down is arranged in the activity cavity. The pressure head is connected to the activity block. A first cross pin is arranged above the activity block. A limiting groove is arranged on the fixing block. The first cross pin is arranged in the limiting groove. The limiting groove is used to limit the activity range of the first cross pin.

[0006] The cross section of the first cross pin is a trapezoid with a narrow upper part and a wide lower part. A corresponding first slot is arranged at the upper end of the activity block. The first cross pin is inserted into the first slot.

[0007] A return spring is further arranged in the activity cavity. One end of the return spring abuts against the fixing block, and the other end abuts against the first cross pin.

[0008] A second cross pin integrally formed with the activity block is arranged at the bottom of the activity block. A corresponding second slot is arranged on the pressure head. The second cross pin is inserted into the second slot.

[0009] The cross section of the second cross pin is a trapezoid with a wide upper part and a narrow lower part.

[0010] A third slot is further arranged on the pressure head. The third slot is vertically arranged relative to the second slot.

[0011] A third transverse pin is provided in the third slot.

[0012] A through hole is provided at the lower end of the movable block, and the third transverse pin is inserted into the through hole.

[0013] The cross-section of the third transverse pin is square.

[0014] Groove-shaped channels are provided on the side walls of the movable block.

[0015] When the utility model is in use, first, the fixed block and the fixed plate are fixed with bolts, the spring is placed in the movable cavity of the fixed block, the first transverse pin is inserted into the first slot, the corresponding punch is installed according to the die specifications, and then it is installed on the machine. The magnetic powder material is loaded into the die cavity to prepare for the pressing process. The punch starts to move downward driven by the upper oil cylinder, the movable block drives the punch to move downward, applies pressure to the magnetic powder in the die cavity, and compacts the powder into a predetermined shape. During the pressing process, the magnetic powder material is magnetized in the die. Due to the action of the magnetic field, the powder particles will have slight movement or rearrangement. At this time, the return spring plays a role, and the upper punch can make fine up and down adjustments, so as to eliminate possible gaps and ensure that the punch always maintains uniform pressure on the powder. The product completed with pressing and magnetization is taken out of the die, and then the subsequent sintering process is carried out.

[0016] The beneficial effects brought by the utility model are as follows:

[0017] The movable punch uses a spring mechanism to keep the punch pressing on the powder all the time during the powder magnetization movement. Since the micro-pressure of the spring will not cause the movement direction of the magnetic powder.

[0018] The utility model adopts multiple transverse pins and the matching through holes and slot structures to ensure the connection stability between the movable block and the punch.

[0019] The utility model can adapt to the forming requirements of magnetic steels with different specifications and shapes through the adjustable movable block, and has high adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the utility model.

[0021] Figure 2 is an exploded view of the utility model.

[0022] Figure 3 is a schematic structural diagram of the fixed block of the utility model.

[0023] Figure 4 is a schematic structural diagram of the punch of the utility model.

[0024] In the figure: 1. Fixed plate; 2. Fixed block; 3. Pressing head; 4. Movable cavity; 5. Movable block; 6. First cross pin; 7. Limiting groove; 8. First slot; 9. Return spring; 10. Second cross pin; 11. Second slot; 12. Third slot; 13. Third cross pin; 14. Through hole; 15. Grooved channel. Specific implementation manner

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] According to Figures 1 to 4 As shown, a magnetic steel forming movable upper pressing head of the present invention includes a fixed plate 1. A fixed block 2 is connected below the fixed plate 1, and a pressing head 3 for pressing magnetic powder is provided below the fixed block 2. A movable cavity 4 is provided inside the fixed block 2, and a movable block 5 that can move up and down is arranged in the movable cavity 4. The pressing head 3 is fixedly connected above the movable block 5. A first cross pin 6 is provided on the movable block 5, and a limiting groove 7 is provided on the fixed block 2. The first cross pin 6 passes through the limiting groove 7. The function of the limiting groove 7 is to limit the movement range of the first cross pin 6, thereby controlling the movement range of the movable block 5. The cross section of the first cross pin 6 is designed in a trapezoidal shape with a narrow upper part and a wide lower part, and a first slot 8 corresponding to the shape of the cross pin is provided at the upper end of the movable block 5. The first cross pin 6 is inserted into this slot to ensure a stable connection between the movable block 5 and the first cross pin 6. In addition, a return spring 9 is also provided in the movable cavity 4. One end of the return spring 9 abuts against the fixed block 2, and the other end abuts against the first cross pin 6. The function of this return spring 9 is to reset the movable block 5 after it moves, so as to ensure that the upper pressing head 3 can automatically return to the initial position during the forming process. This structure enables the upper pressing head 3 to perform up and down fine adjustment with the slight movement of the powder during the forming process, avoiding the forming quality problems caused by the displacement of the powder due to the change of the magnetic field.

[0027] A second cross pin 10 integrally formed with the movable block 5 is provided at the bottom of the movable block 5, and a second slot 11 corresponding to the second cross pin 10 is provided on the pressing head 3. The second cross pin 10 is inserted into this second slot 11 to firmly connect the movable block 5 and the pressing head 3 together. The cross section of the second cross pin 10 is trapezoidal with a wide upper part and a narrow lower part, ensuring that the connection between the movable block 5 and the pressing head 3 is tight and not easy to loosen or fall off during the forming process.

[0028] In addition to the second slot 11 on the indenter 3, a third slot 12 is provided. The third slot 12 is vertically arranged with the second slot 11. A third cross pin 13 is installed in the third slot 12. A through hole 14 is provided at the lower end of the movable block 5. The third cross pin 13 passes through this through hole 14, further fixing the movable block 5.

[0029] Grooved channels 15 are provided on the side walls of the movable block 5. These channels allow air to circulate around the movable block 5, enabling the air to be discharged more easily and preventing excessive pressure in the movable cavity 4.

[0030] When the utility model is in use, first, the fixed block 2 and the fixed plate 1 are fixed with bolts. The spring is placed into the movable cavity 4 of the fixed block 2. The first cross pin 6 is inserted into the first slot 8. The corresponding indenter 3 is installed according to the die specifications and then installed on the machine. The magnetic powder material is loaded into the die cavity, and the pressing process is ready to start. The indenter 3 starts to move downward driven by the upper oil cylinder. The movable block 5 drives the indenter 3 to move downward, applying pressure to the magnetic powder in the die cavity and compacting the powder into a predetermined shape. During the pressing process, the magnetic powder material is magnetized in the die. Due to the action of the magnetic field, the powder particles will have slight movement or rearrangement. At this time, the return spring 9 plays a role, and the upper indenter 3 can make fine up and down adjustments, thereby eliminating possible voids and ensuring that the indenter 3 always maintains uniform pressure on the powder. The products that have completed pressing and magnetization are taken out of the die and then subjected to subsequent sintering processes.

[0031] The beneficial effects brought by the utility model are as follows:

[0032] The movable indenter utilizes a spring mechanism to keep the indenter always pressing on the powder during the powder magnetization movement. Since the slight pressure of the spring will not cause the movement direction of the magnetic powder.

[0033] The utility model adopts multiple cross pins and the matching through holes and slot structures, ensuring the connection stability between the movable block and the indenter.

[0034] The utility model can adapt to the forming requirements of magnetic steels with different specifications and shapes through adjustable movable blocks, having high adaptability.

[0035] The above is only the preferred embodiment of the utility model. Therefore, all equivalent changes or modifications made according to the structures, features and principles described in the scope of the utility model patent application are included in the scope of the utility model patent application.

Claims

1. A movable upper punch for magnetic steel forming, comprising a fixing plate and a fixing block fixed below it, and a punch is arranged below the fixing block, characterized in that: An activity cavity is provided in the fixed block. An activity block that can move up and down is provided in the activity cavity. The pressing head is connected to the activity block. A first horizontal pin is provided above the activity block. A limiting groove is provided on the fixed block. The first horizontal pin is inserted into the limiting groove. The limiting groove is used to limit the movement range of the first horizontal pin. A return spring is further provided in the activity cavity. One end of the return spring abuts against the fixed block, and the other end abuts against the first horizontal pin.

2. The movable upper pressure head for magnetic steel forming according to claim 1, wherein: The cross-section of the first horizontal pin is a trapezoid with a narrow upper part and a wide lower part. A corresponding first slot is provided at the upper end of the activity block. The first horizontal pin is inserted into the first slot.

3. A movable upper pressure head for magnetic steel forming according to claim 1, characterized in that: A second horizontal pin integrally formed with the activity block is provided at the bottom of the activity block. A corresponding second slot is provided on the pressing head. The second horizontal pin is inserted into the second slot.

4. The movable upper punch for magnet steel forming according to claim 3, wherein: The cross-section of the second horizontal pin is a trapezoid with a wide upper part and a narrow lower part.

5. A movable upper punch for magnetic steel forming according to claim 3, characterized in that: A third slot is further provided on the pressing head. The third slot is vertically arranged relative to the second slot.

6. The movable upper punch for magnet steel forming according to claim 5, wherein: A third horizontal pin is provided in the third slot.

7. The movable upper pressure head for magnet steel forming according to claim 6, wherein: A through hole is provided at the lower end of the activity block. The third horizontal pin is inserted into the through hole.

8. A movable upper punch for magnetic steel forming according to claim 6, characterized in that: The cross-section of the third horizontal pin is square.

9. A movable upper pressure head for magnetic steel forming according to claim 1, characterized in that: Groove-shaped channels are provided on the side walls of the activity block.

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