Neodymium-iron-boron forming die floating presser

Abstract

The utility model provides a kind of neodymium iron boron forming die floating type pressure rod, include guide block, connecting block, the top of guide block is provided with several first countersunk head hole, the top of connecting block is provided with first screw hole, guide bolt is arranged in first countersunk head hole, guide bolt includes nut, connecting rod, threaded connection end, threaded connection end is connected on first screw hole, linear bearing matched with connecting rod is arranged in first countersunk head hole, connecting rod is movably arranged on linear bearing, the bottom of connecting block is provided with clamping groove, the longitudinal section of clamping groove is isosceles trapezoidal shape, two ends of clamping groove respectively extend to the two end faces of connecting block.The stress of powder material to the head can drive connecting block to float together, avoid the degree of orientation of powder material to be influenced, avoid the insufficient orientation of powder material to reduce the remanence parameter of magnet, avoid the distribution density difference of powder material in lower mould cavity to be larger, sintered magnet will not be deformed, and smaller product can be processed.

Description

Technical Field

[0001] This utility model relates to the field of magnet mold technology, and more particularly to a floating pressure bar for a neodymium iron boron molding mold. Background Technology

[0002] Neodymium magnets, also known as neodymium iron boron magnets, are tetragonal crystals composed of neodymium, iron, and boron. These magnets have a higher magnetic energy product than samarium cobalt magnets, making them the material with the highest magnetic energy product in the world at the time. They are currently the second most powerful permanent magnets after holmium magnets at absolute zero, and are also the most commonly used rare-earth magnets. Neodymium iron boron magnets are widely used in electronic products such as hard drives, mobile phones, headphones, and battery-powered tools.

[0003] In the manufacture of neodymium iron boron magnets, powdered material is first pressed into the desired shape using a mold, and then the pressed material is sintered. The pressing mold for neodymium iron boron magnets mainly consists of a lower mold cavity and a pressing head. The shape of the pressing head matches the lower mold cavity, and the pressing head is mounted on a pressing rod, which is mounted on the movable end of a stamping machine. During pressing, the powdered material is first added to the lower mold cavity, and then the pressing machine drives the pressing rod down, which in turn drives the pressing head into the lower mold cavity to press the powdered material.

[0004] Currently, the pressure bar and pressure head are rigidly connected. During product pressing, the pressure bar cannot float, affecting the powder orientation and leading to insufficient powder orientation, thus reducing the remanence of the magnet. When the powder in the lower mold cavity is pressed by the pressure head, it flows to both sides of the lower mold cavity under the influence of the magnetic field during orientation. The powder density at the center of the lower mold cavity will be much lower than that at the sides. For products with a thickness of less than 10mm, deformation and bulging will occur after pressing and sintering, requiring subsequent processing for correction, increasing the complexity of the production process. Utility Model Content

[0005] The problem to be solved by this utility model is to provide a floating pressure bar for neodymium iron boron molding mold, which avoids product deformation and bulging, reduces subsequent processes, and simplifies the production process.

[0006] To solve the above technical problems, a floating pressure rod for a neodymium iron boron molding die provided by this utility model is provided, comprising a guide block and a connecting block. The top of the guide block is provided with a plurality of first countersunk holes. The top of the connecting block is provided with a first screw hole corresponding to the first countersunk hole. A guide bolt is provided in the first countersunk hole. The guide bolt includes a nut, a connecting rod connected to one end of the nut, and a threaded connection end connected to one end of the connecting rod. The threaded connection end is connected to the first screw hole. A linear bearing matching the connecting rod is provided in the first countersunk hole. The connecting rod is movably mounted on the linear bearing. A groove is provided at the bottom of the connecting block. The longitudinal section of the groove is an isosceles trapezoidal shape. The two ends of the groove extend to the two end faces of the connecting block, respectively.

[0007] Preferably, the top of the card slot is connected to a dividing groove, one end of the dividing groove is connected to a cylindrical expansion groove, one side of the connecting block is provided with two second countersunk holes communicating with the dividing groove, the other side of the connecting block is provided with a second screw hole corresponding to the second countersunk hole and communicating with the dividing groove, and a locking bolt is connected between the second countersunk hole and the second screw hole.

[0008] Preferably, the top of the guide block is provided with several third screw holes.

[0009] Preferably, when the top surface of the connecting block contacts the bottom surface of the guide block, the top surface of the nut is located inside the top surface of the first countersunk hole.

[0010] Preferably, when the top surface of the connecting block contacts the bottom surface of the guide block, the distance between the bottom surface of the nut and the top surface of the linear bearing is 16mm.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a floating pressure bar for neodymium iron boron molding dies. To facilitate the use of the pressure bar, a connecting part matching the shape of the slot should be provided on the top of the pressure head. When assembling the pressure head onto the pressure bar, the connecting part of the pressure head is locked into the slot of the connecting block, which can realize the quick connection between the pressure head and the pressure bar. Due to the gravity of the connecting block and the pressure head, the guide block and the connecting block will automatically separate in the mold-opening state, and the nut will be locked at the top of the linear bearing to limit the opening and closing distance between the guide block and the connecting block. When pressing the powder material in the lower mold cavity, the press rod moves downward through the press, and the press head enters the lower mold cavity to press the powder material. Since the connecting block is blocked by the press head and cannot continue to descend, the guide block and the connecting block will close together, ensuring that the press head applies sufficient pressure to the powder material in the lower mold cavity and presses it into the required shape and size. Then, the press moves the guide block to a certain height to separate the guide block and the connecting block. When magnetizing and oriented the product in the lower mold cavity, the press head can hold the powder material under its own weight and the weight of the connecting block. Since the guide block and the connecting block are separated, when the press head is subjected to the upward stress of the powder material, it can drive the connecting block to float up together, avoiding affecting the orientation degree of the powder material, avoiding insufficient orientation of the powder material and reducing the remanent magnet parameters of the magnet, avoiding large differences in the distribution density of the powder material in the lower mold cavity, and ensuring that the sintered magnet will not deform, allowing for the processing of smaller products. Attached Figure Description

[0012] Figure 1 A front view of the present invention is shown.

[0013] Figure 2 A cross-sectional view of the present invention is shown.

[0014] Figure 3 The right view of this utility model is shown as an example.

[0015] Figure 4 A top view of the present invention is shown.

[0016] Figure 5 A schematic diagram illustrating the structure of the connecting block of this utility model is shown.

[0017] Figure 6 A schematic diagram illustrating the structure of the guide block of this utility model is shown.

[0018] The reference numerals in the attached diagram are as follows: guide block 1, first countersunk hole 10, third screw hole 11, connecting block 2, first screw hole 20, slot 21, dividing slot 22, cylindrical expansion slot 23, second countersunk hole 24, second screw hole 25, guide bolt 3, nut 30, connecting rod 31, threaded connection end 32, linear bearing 4, locking bolt 5. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure.

[0020] Based on the embodiments described in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0021] refer to Figures 1-6 .

[0022] This utility model provides a floating pressure bar for a neodymium iron boron molding die, comprising a guide block 1 and a connecting block 2. The top of the guide block 1 is provided with a plurality of first countersunk holes 10. The top of the connecting block 2 is provided with a first screw hole 20 corresponding to the first countersunk holes 10. A guide bolt 3 is provided in the first countersunk hole 10. The guide bolt 3 includes a nut 30, a connecting rod 31 connected to one end of the nut 30, and a threaded connection end 32 connected to one end of the connecting rod 31. The threaded connection end 32 is connected to the first screw hole 20. A linear bearing 4 matching the connecting rod 31 is provided in the first countersunk hole 10. The connecting rod 31 is movably mounted on the linear bearing 4. The bottom of the connecting block 2 is provided with a groove 21. The longitudinal section of the groove 21 is an isosceles trapezoidal shape. The two ends of the groove 21 extend to the two end faces of the connecting block 2, respectively.

[0023] The specific operating principle is as follows: to facilitate the use of the pressure rod, a connecting part matching the shape of the slot 21 should be provided on the top of the pressure head. When assembling the pressure head onto the pressure rod, the connecting part of the pressure head is locked into the slot 21 of the connecting block 2, which can realize the quick connection between the pressure head and the pressure rod. Due to the gravity of the connecting block 2 and the pressure head, the guide block 1 and the connecting block 2 will automatically separate in the mold opening state, and the nut 30 will be locked at the top of the linear bearing 4 to limit the opening and closing distance between the guide block 1 and the connecting block 2. When pressing the powder material in the lower mold cavity, the press rod moves downward through the press, and the press head enters the lower mold cavity to press the powder material. Since the connecting block 2 is blocked by the press head and cannot continue to descend, the guide block 1 and the connecting block 2 will close together, ensuring that the press head applies sufficient pressure to the powder material in the lower mold cavity and presses it into the required shape and size. Then, the press moves the guide block 1 to a certain height so that the guide block 1 and the connecting block 2 can separate. When magnetizing and oriented the product in the lower mold cavity, the press head can press the powder material under its own weight and the weight of the connecting block 2. Since the guide block 1 and the connecting block 2 are separated, when the press head is subjected to the upward stress of the powder material, it can drive the connecting block 2 to float up together, avoiding affecting the orientation degree of the powder material, avoiding insufficient orientation of the powder material and reducing the remanent magnet parameters of the magnet, avoiding large differences in the distribution density of the powder material in the lower mold cavity, and preventing the sintered magnet from deforming. Smaller products can be processed, which is worth promoting and using.

[0024] Based on the above embodiment, a dividing groove 22 is connected to the top of the slot 21, and a cylindrical expansion groove 23 is connected to one end of the dividing groove 22. Two second countersunk holes 24 communicating with the dividing groove 22 are provided through one side of the connecting block 2, and a second screw hole 25 corresponding to the second countersunk holes 24 and communicating with the dividing groove 22 is provided through the other side of the connecting block 2. A locking bolt 5 is connected between the second countersunk holes 24 and the second screw hole 25. After the connecting part of the pressure head is assembled into the slot 21, the width of the dividing groove 22 is reduced by tightening the locking bolt 5, thereby allowing the slot 21 to tighten and hold the connecting part of the pressure head, which can improve the connection stability between the connecting block 2 and the pressure head.

[0025] Based on the above embodiments, the top of the guide block 1 is provided with several third screw holes 11, which facilitates the connection between the movable end of the press and the guide block 1 by screws.

[0026] Based on the above embodiments, when the top surface of the connecting block 2 contacts the bottom surface of the guide block 1, the top surface of the nut 30 is located inside the top surface of the first countersunk hole 10, so as to prevent the top of the nut 30 from extending beyond the first countersunk hole 10 when the connecting block 2 and the guide block 1 are closed, and thus will not interfere with the opening and closing of the connecting block 2.

[0027] Based on the above embodiments, when the top surface of the connecting block 2 contacts the bottom surface of the guide block 1, the distance between the bottom surface of the nut 30 and the top surface of the linear bearing 4 is 16mm, so as to control the opening and closing height range of the connecting block 2 and the guide block 1.

[0028] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A floating plunger for a neodymium-iron-boron forming die, characterized in that The device includes a guide block and a connecting block. The top of the guide block has several first countersunk holes. The top of the connecting block has a first threaded hole corresponding to the first countersunk holes. A guide bolt is installed in the first countersunk hole. The guide bolt includes a nut, a connecting rod connected to one end of the nut, and a threaded connection end connected to one end of the connecting rod. The threaded connection end is connected to the first threaded hole. A linear bearing matching the connecting rod is installed in the first countersunk hole. The connecting rod is movably mounted on the linear bearing. The bottom of the connecting block has a groove with an isosceles trapezoidal cross-section. Both ends of the groove extend to the two end faces of the connecting block.

2. The floating pressure bar for a neodymium iron boron forming mold according to claim 1, characterized in that, The top of the slot is connected to a dividing groove, one end of the dividing groove is connected to a cylindrical expansion groove, one side of the connecting block is provided with two second countersunk holes that communicate with the dividing groove, and the other side of the connecting block is provided with a second screw hole that corresponds to the second countersunk hole and communicates with the dividing groove. A locking bolt is connected between the second countersunk hole and the second screw hole.

3. The floating pressure bar for a neodymium iron boron forming mold according to claim 2, characterized in that, The top of the guide block is provided with several third screw holes.

4. The floating pressure bar for NdFeB molding die according to claim 3, characterized in that, When the top surface of the connecting block contacts the bottom surface of the guide block, the top surface of the nut is located inside the top surface of the first countersunk hole.

5. A floating pressure bar for a neodymium iron boron forming mold according to claim 4, characterized in that, When the top surface of the connecting block contacts the bottom surface of the guide block, the distance between the bottom surface of the nut and the top surface of the linear bearing is 16mm.

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