Adjustable cavity size combined die for neodymium iron boron machining

Abstract

The application discloses a combined die with adjustable die cavity size for neodymium iron boron processing and belongs to the technical field of neodymium iron boron processing, which comprises two main side plates, a vice side plate installed between the two main side plates and a die cavity formed between the two main side plates and the two vice side plates. A sliding groove is arranged on the main side plate. The vice side plate comprises a base plate and push plates symmetrically arranged on the two sides of the base plate. Two trapezoidal grooves symmetrically arranged relative to the base plate are formed between the two push plates. Trapezoidal blocks are slidably installed in the trapezoidal grooves. An active gap is arranged between the trapezoidal blocks and the base plate. Slides matched with the sliding groove are fixedly arranged on the opposite sides of the trapezoidal blocks. A bidirectional screw is rotatably installed on the base plate and located in the trapezoidal groove. The two trapezoidal blocks are threadedly connected to the opposite threads of the bidirectional screw. Springs are fixedly connected between the two push plates. The inclined surfaces of the trapezoidal groove and the trapezoidal block are matched to enable the push plate to be horizontally moved by rotating the bidirectional screw, so that the length of the die cavity is adjusted.

Description

Technical Field

[0001] This invention belongs to the field of neodymium iron boron processing technology, specifically relating to a combined mold with adjustable cavity size for neodymium iron boron processing. Background Technology

[0002] In the existing mold manufacturing field of the sintered NdFeB industry, especially in the production of ordinary molds, the "one-to-one" customized design and production method is commonly used.

[0003] When a product of a specific size (specific mold width, specific orientation) needs to be produced, engineers design and manufacture a unique set of molds that correspond exclusively to that product size. This set of molds includes large and small side plates, and the grooves and depths on the large side plates are not interchangeable with those of other molds. If the product size changes even slightly, a completely new set of molds needs to be redesigned and manufactured, rendering the old mold components completely obsolete, as it is impossible to meet the new requirements by adjusting or reassembling existing components.

[0004] Therefore, it is necessary to propose a combined mold with adjustable cavity size for NdFeB machining to solve the above problems. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a combined mold with adjustable cavity size for NdFeB machining, which solves the problems of high cost, serious material waste, low efficiency and non-interchangeable parts in the existing customized molds.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a combined mold with adjustable cavity size for NdFeB machining, comprising two main side plates and a secondary side plate installed between the two main side plates, forming a mold cavity between the two main side plates and the two secondary side plates. The main side plates are provided with vertically extending grooves. The secondary side plates include a base plate fixedly installed between the two main side plates and push plates symmetrically arranged on both sides of the base plate in the horizontal direction. Two trapezoidal grooves are formed between the two push plates, symmetrically arranged about the horizontal plane of the base plate center. Trapezoidal blocks are slidably installed in the trapezoidal grooves, and there is an movable gap between the trapezoidal blocks and the base plate. Slide plates that cooperate with the grooves are fixedly installed on the side walls of the trapezoidal blocks relative to their respective side walls. A bidirectional screw located in the trapezoidal groove is rotatably installed on the base plate. The two trapezoidal blocks are respectively threaded onto opposite threads of the bidirectional screw. A spring is fixedly connected between the two push plates. Rotating the bidirectional screw can cause the two trapezoidal blocks to move closer or further apart in the vertical direction, and cause the two push plates to move further or closer together in the horizontal direction.

[0007] Furthermore, the push plate has an arc-shaped groove on the side away from the spring, and an arc-shaped block is rotatably connected in the arc-shaped groove. A support plate that is integrally connected with the arc-shaped block is fixedly installed on the side away from the push plate. A gap is provided between the support plate and the push plate, and a first elastic pad for connecting the support plate and the push plate is fixedly installed in the gap.

[0008] Furthermore, the push plate is provided with an adjustment chamber communicating with the arc-shaped groove. A strip-shaped toothed plate that can slide in the vertical direction is slidably installed in the adjustment chamber. A fan-shaped toothed plate that meshes with the strip-shaped toothed plate is fixedly installed on the arc-shaped block. An adjustment screw is threadedly connected to the push plate. The adjustment screw is rotatably connected to the strip-shaped toothed plate. Rotating the adjustment screw can make the strip-shaped toothed plate slide in the vertical direction to make the arc-shaped plate rotate.

[0009] Furthermore, a pressing plate for contacting NdFeB powder is slidably installed on the support plate near the mold cavity side. A plurality of first trapezoidal strips are fixedly arranged side by side on the support plate near the pressing plate side. A plurality of second trapezoidal strips are fixedly arranged side by side on the pressing plate near the support plate side. A gap is formed between two adjacent first trapezoidal strips to cooperate with the second trapezoidal strips and to allow the second trapezoidal strips to slide vertically. The cooperation between the first trapezoidal strips and the second trapezoidal strips can limit the horizontal displacement of the second trapezoidal strips.

[0010] Furthermore, the horizontal widths of the push plates on both sides of the substrate are inconsistent.

[0011] Furthermore, the substrate has multiple through holes arranged side by side on both sides of the bidirectional screw, which penetrate the substrate in a horizontal direction. A connecting rod extending into the through hole is fixedly provided on the push plate, and the spring is fixedly provided between the two connecting rods.

[0012] Furthermore, a vibrator is fixedly installed inside the first trapezoidal strip, and the output direction of the vibrator is set along the arrangement direction of the plurality of first trapezoidal strips.

[0013] Furthermore, the arc-shaped groove is connected to the adjustment chamber through an arc-shaped notch, the fan-shaped toothed plate is slidably installed in the arc-shaped notch, and a second elastic pad is fixedly connected between the fan-shaped toothed plate and the side wall of the arc-shaped notch.

[0014] The beneficial effects of this invention are as follows: In this invention, both the cross-section of the trapezoidal groove and the cross-section of the trapezoidal block are isosceles trapezoids. The inclined surfaces of the trapezoidal groove and the trapezoidal block engage to allow the push plate to move horizontally by rotating the bidirectional screw, thereby adjusting the length of the mold cavity. This enables the interchangeability and reuse of mold components between different products, significantly reducing costs and improving material utilization and production efficiency. Furthermore, the trapezoidal groove and the trapezoidal block form a surface contact, ensuring the load-bearing capacity of the push plate during the molding process. During demolding, rotating the bidirectional screw allows the push plates on the two secondary side plates to move away from each other, facilitating demolding. Attached Figure Description

[0015] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a schematic diagram of the secondary side plate structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the combined mold structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the mating structure of the first trapezoidal strip and the second trapezoidal strip in an embodiment of the present invention.

[0016] The following components are labeled in the attached diagram: main side plate 1, slide groove 101, secondary side plate 2, base plate 201, push plate 202, trapezoidal groove 203, trapezoidal block 204, slide plate 205, bidirectional screw 206, spring 207, arc groove 208, arc block 209, support plate 210, gap 211, first elastic pad 212, adjustment chamber 213, strip toothed plate 214, fan toothed plate 215, adjustment screw 216, pressing plate 217, first trapezoidal strip 218, second trapezoidal strip 219, through hole 220, connecting rod 221, arc notch 222, second elastic pad 223, mold cavity 3. Detailed Implementation

[0017] like Figures 1-3 As shown, this invention discloses a combined mold with adjustable cavity size for NdFeB machining, comprising: two main side plates 1 and a secondary side plate 2 installed between the two main side plates 1, forming a mold cavity 3 between the two main side plates 1 and the two secondary side plates 2. The main side plates 1 are provided with vertically extending grooves 101. The secondary side plates 2 include a base plate 201 fixedly installed between the two main side plates 1 and push plates 202 symmetrically arranged on both sides of the base plate 201 in a horizontal direction. Two trapezoidal grooves 2 are formed between the two push plates 202, symmetrically arranged about the horizontal plane of the center of the base plate 201. 03. A trapezoidal block 204 is slidably installed in the trapezoidal groove 203. The trapezoidal block 204 has a sliding plate 205 that cooperates with the sliding groove 101 fixedly installed on its opposite side walls. A bidirectional screw 206 located in the trapezoidal groove 203 is rotatably installed on the base plate 201. The two trapezoidal blocks 204 are respectively threaded onto opposite threads on the bidirectional screw 206. A spring 207 is fixedly connected between the two push plates 202. Rotating the bidirectional screw 206 can make the two trapezoidal blocks 204 move closer or further away in the vertical direction, and make the two push plates 202 move further or closer in the horizontal direction.

[0018] In this design, the cross-sections of the trapezoidal groove 203 and the trapezoidal block 204 are both isosceles trapezoids. The inclined surfaces of the trapezoidal groove 203 and the trapezoidal block 204 are engaged to allow the push plate 202 to move horizontally by rotating the bidirectional screw 206, thereby adjusting the length of the mold cavity 3. This enables the interchangeability and reuse of mold components between different products, significantly reducing costs and improving material utilization and production efficiency. Furthermore, the trapezoidal groove 203 and the trapezoidal block 204 form a surface contact, ensuring the load-bearing capacity of the push plate 202 during the molding process. During demolding, rotating the bidirectional screw 206 can move the push plates 202 that are close to each other on the two secondary side plates 2 away from each other, facilitating demolding.

[0019] In one embodiment of the present invention, an arc-shaped groove 208 is provided on the side of the push plate 202 away from the spring 207, and an arc-shaped block 209 is rotatably connected in the arc-shaped groove 208. A support plate 210 is fixedly provided on the side of the arc-shaped block 209 away from the push plate 202 and is integrally connected with the arc-shaped block 209. A gap 211 is provided between the support plate 210 and the push plate 202, and a first elastic pad 212 for connecting the support plate 210 and the push plate 202 is fixedly provided in the gap 211.

[0020] In this design, a mold cavity 3 is formed between the adjacent support plates 210 on the two secondary side plates 2 and the two main side plates 1. By rotating the arc block 209, a trapezoid is formed between the two adjacent support plates 210. When applied to upward demolding, the arc block 209 is rotated to form an isosceles trapezoid that is wider at the top and narrower at the bottom between the two adjacent support plates 210. When applied to downward demolding, the arc block 209 is rotated to form an isosceles trapezoid that is narrower at the top and wider at the bottom between the two adjacent support plates 210. For example, in an automatic metal powder forming mold disclosed in Chinese Patent No. CN209736630U, the arc block 209 is adjusted to make the mold cavity 3 form a certain taper, which reduces the chance of powder getting stuck in the gaps of the inner wall of the mold cavity 3 and avoids scratches and wear of the mold cavity by the powder during the forming process.

[0021] In one embodiment of the present invention, the push plate 202 is provided with an adjustment chamber 213 communicating with the arc-shaped groove 208. A strip-shaped toothed plate 214 capable of sliding in the vertical direction is slidably installed in the adjustment chamber 213. A fan-shaped toothed plate 215 that meshes with the strip-shaped toothed plate 214 is fixedly provided on the arc-shaped block 209. An adjustment screw 216 is threadedly connected to the push plate 202. The adjustment screw 216 is rotatably connected to the strip-shaped toothed plate 214. Rotating the adjustment screw 216 can cause the strip-shaped toothed plate 214 to slide in the vertical direction, thereby causing the arc-shaped plate 209 to rotate.

[0022] In this scheme, the above structure is used to drive the arc plate 209 to rotate. The first elastic pad 212 can seal the gap 211 and compensate for the range of motion of the tooth meshing between the strip tooth plate 214 and the fan tooth plate 215, so that the strip tooth plate 214 and the fan tooth plate 215 mesh more tightly, avoiding the pressure during the molding process from causing the arc block 209 to rotate. In addition, the moving parts of the entire structure are all in surface contact, which improves the compressive strength of the secondary side plate 2.

[0023] In one embodiment of the present invention, a pressing plate 217 for contacting NdFeB powder is slidably installed on the support plate 210 near the mold cavity 3. A plurality of first trapezoidal strips 218 are fixedly arranged side by side on the support plate 210 near the pressing plate 217. A plurality of second trapezoidal strips 219 are fixedly arranged side by side on the pressing plate 217 near the support plate 210. A gap is formed between two adjacent first trapezoidal strips 218 to cooperate with the second trapezoidal strips 219 and to allow the second trapezoidal strips 219 to slide vertically. The cooperation between the first trapezoidal strips 218 and the second trapezoidal strips 219 can limit the horizontal displacement of the second trapezoidal strips 219.

[0024] In this design, the second trapezoidal strip 219 on the pressing plate 217 is slid into the gap between the two first trapezoidal strips 218, and the pressing plate 217 is fixed to the support plate 210. The pressing plate 217 serves as the plate surface in contact with the NdFeB powder. After the pressing plate 217 is worn due to frequent use, it is easy to replace the pressing plate 217, reducing replacement costs. Furthermore, through the cooperation of the first trapezoidal strip 218 and the second trapezoidal strip 219, the pressing plate 217 and the support plate 210 are tightly fitted together, avoiding deformation of the pressing plate 217 caused by heat or uneven stress, thereby ensuring the flatness of the plane of the pressing plate 217 near the mold cavity 3.

[0025] In one embodiment of the present invention, the horizontal widths of the push plates 202 on both sides of the substrate 201 are inconsistent.

[0026] In this scheme, one of the two push plates 202 on the same secondary side plate 2 is called the shorter push plate 202, and the other longer push plate 202 is called the second push plate. The horizontal width of the first push plate and the horizontal width of the second push plate deviate by 0.15mm. By different combination modes, the adjustable range of the mold cavity 3 can be improved. For example, the first push plate and the second push plate can be matched on both sides of the mold cavity 3, the first push plate and the first push plate can be matched, and the second push plate and the second push plate can be matched, so as to achieve precise fine adjustment within the range of 0.3mm without any additional processing.

[0027] In one embodiment of the present invention, a plurality of through holes 220 extending horizontally through the substrate 201 are arranged side by side on both sides of the bidirectional screw 206, and a connecting rod 221 extending into the through hole 220 is fixedly arranged on the push plate 202, and the spring 207 is fixedly arranged between two connecting rods 221.

[0028] In one embodiment of the present invention, a vibrator is fixedly installed inside the first trapezoidal strip 218, and the output direction of the vibrator is arranged along the arrangement direction of the plurality of first trapezoidal strips 218.

[0029] In this solution, the vibrator is a conventional technical means in the field, and will not be illustrated or described in detail here. This embodiment only restricts the output direction of the vibrator. The vibrator acts along the arrangement direction of the multiple first trapezoidal strips 218, that is, the vibrator does not act perpendicularly to the pressing plate 217. Instead, it acts on the multiple second trapezoidal strips 219 to transmit the vibration force to the pressing plate 217. Before or during the pressing process, the vibrator is activated to make the powder evenly distributed and to avoid the vibration force acting directly perpendicularly to the pressing plate 217, which would affect the flatness of the pressing plate 217 near the powder.

[0030] In one embodiment of the present invention, the arc-shaped groove 208 and the adjustment chamber 213 are connected through the arc-shaped notch 222, the fan-shaped toothed plate 215 is slidably installed in the arc-shaped notch 222, and a second elastic pad 223 is fixedly connected between the fan-shaped toothed plate 215 and the side wall of the arc-shaped notch 222.

[0031] In this scheme, the rotation range of the sector toothed plate 215 is limited by the arc-shaped notch 222, while the rotation range of the support plate 210 is limited by the gap 211; and the joint action of the first elastic pad 212 and the second elastic pad 223 is used to enhance the meshing tightness between the strip toothed plate 214 and the sector toothed plate 215, and to enhance the stability of the support plate 210.

[0032] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A combined mold with adjustable cavity size for NdFeB machining, comprising two main side plates and a secondary side plate installed between the two main side plates, characterized in that, A mold cavity is formed between two main side plates and two secondary side plates. The main side plates are provided with vertically extending grooves. The secondary side plates include a base plate fixedly installed between the two main side plates and push plates symmetrically arranged on both sides of the base plate in the horizontal direction. Two trapezoidal grooves are formed between the two push plates and symmetrically arranged about the center horizontal plane of the base plate. Trapezoidal blocks are slidably installed in the trapezoidal grooves. There is an movable gap between the trapezoidal blocks and the base plate. Slide plates that cooperate with the grooves are fixedly installed on the side walls of the trapezoidal blocks. A bidirectional screw located in the trapezoidal groove is rotatably installed on the base plate. The two trapezoidal blocks are respectively threaded onto the opposite threads of the bidirectional screw. A spring is fixedly connected between the two push plates. Rotating the bidirectional screw can make the two trapezoidal blocks move closer or further away in the vertical direction and make the two push plates move further or closer in the horizontal direction.

2. The combined mold with adjustable cavity size for NdFeB machining according to claim 1, characterized in that: The push plate has an arc-shaped groove on the side away from the spring. An arc-shaped block is rotatably connected in the arc-shaped groove. A support plate, which is integrally connected to the arc-shaped block, is fixedly installed on the side away from the push plate. A gap is provided between the support plate and the push plate. A first elastic pad for connecting the support plate and the push plate is fixedly installed in the gap.

3. The combined mold with adjustable cavity size for NdFeB machining according to claim 2, characterized in that: The push plate is provided with an adjustment chamber that communicates with the arc-shaped groove. A strip toothed plate that can slide in the vertical direction is slidably installed in the adjustment chamber. A fan-shaped toothed plate that meshes with the strip toothed plate is fixedly installed on the arc-shaped block. An adjustment screw is threadedly connected to the push plate. The adjustment screw is rotatably connected to the strip toothed plate. Rotating the adjustment screw can make the strip toothed plate slide in the vertical direction to make the arc plate rotate.

4. The combined mold with adjustable cavity size for NdFeB machining according to claim 3, characterized in that: The support plate is slidably mounted with a pressing plate for contacting NdFeB powder near the mold cavity side. Multiple first trapezoidal strips are fixedly arranged side by side on the support plate near the pressing plate side. Multiple second trapezoidal strips are fixedly arranged side by side on the pressing plate near the support plate side. A gap is formed between two adjacent first trapezoidal strips to cooperate with the second trapezoidal strips and to allow the second trapezoidal strips to slide vertically. The cooperation between the first trapezoidal strips and the second trapezoidal strips can limit the horizontal displacement of the second trapezoidal strips.

5. The combined mold with adjustable cavity size for NdFeB machining according to claim 1, characterized in that: The horizontal widths of the push plates on both sides of the substrate are inconsistent.

6. The combined mold with adjustable cavity size for NdFeB machining according to claim 1, characterized in that: The substrate has multiple through holes arranged side by side on both sides of the bidirectional screw, which penetrate the substrate in a horizontal direction. A connecting rod extending into the through hole is fixedly provided on the push plate, and the spring is fixedly provided between the two connecting rods.

7. The combined mold with adjustable cavity size for NdFeB machining according to claim 4, characterized in that: A vibrator is fixedly installed inside the first trapezoidal strip, and the output direction of the vibrator is set along the arrangement direction of the plurality of first trapezoidal strips.

8. The combined mold with adjustable cavity size for NdFeB machining according to claim 4, characterized in that: The arc-shaped groove is connected to the adjustment chamber through an arc-shaped notch. The fan-shaped toothed plate is slidably installed in the arc-shaped notch, and a second elastic pad is fixedly connected between the fan-shaped toothed plate and the side wall of the arc-shaped notch.

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