A trimming concave die for a brushless claw pole blank

Abstract

The utility model discloses a kind of trimming die of brush claw pole blank, it is related to trimming die technical field, and its technical scheme main points include die body, the middle part of the die body is equipped with trimming cavity, the side wall of the trimming cavity is integrally formed with the trimming projection matched with brush claw pole trimming, contact block is fixedly connected at the trimming projection at the bottom of trimming cavity, the thickness of the contact block is 0.5mm-1mm, effect is to greatly extend the service life of mould, reduce mould replacement frequency, improve production continuity.

Description

Technical Field

[0001] This utility model relates to the field of edge trimming die technology, and more specifically, it relates to an edge trimming die for a brushless claw electrode blank and its processing technology. Background Technology

[0002] In the hot-cutting process of brushless claw electrode blanks, the performance and lifespan of the die have long been key factors affecting production efficiency, cost, and product quality. Traditional brushless claw electrode cutting dies mostly adopt a straight-up-down cavity structure design. In actual production, due to the large contact area between the cavity sidewall and the claw electrode, material flow is obstructed during hot cutting, and the die cutting edge must withstand extremely high compressive stress and thermal wear. On the one hand, poor material flow easily leads to unstable cutting quality, resulting in defects such as burrs and material shortages, increasing the cost of subsequent burr removal processes, and even affecting the final assembly and performance of the product. On the other hand, the die cutting edge is frequently subjected to high stress and thermal wear, and usually becomes scrapped due to severe wear after processing more than 1,000 pieces, requiring frequent die replacements. This not only interrupts the production process and reduces production efficiency, but also significantly increases the procurement and management costs of dies, restricting the enterprise's large-scale and efficient production. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cutting die for a brushless claw electrode blank and its processing technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A cutting edge die for a brushless claw electrode blank includes a die body, a cutting edge cavity is formed in the middle of the die body, the side wall of the cutting edge cavity is integrally formed with a cutting edge protrusion that matches the cutting edge of the brushless claw electrode, and a contact block is fixedly connected to the cutting edge protrusion at the bottom of the cutting edge cavity, the thickness of the contact block being 0.5mm-1mm.

[0006] Preferably, the slit protrusions are arranged circumferentially and equidistantly on the sidewall of the slit cavity.

[0007] Preferably, the height of the die body is 1.5-10mm.

[0008] A processing method for a brushless claw electrode blank, the processing method comprising the following steps:

[0009] The raw material is heated to the forging temperature;

[0010] Upsetting process is performed on the heated raw material blank;

[0011] The blank that has been upset is pre-forged in a pre-forging die so that the shape and size of the pre-forged blank meet the forging requirements.

[0012] The pre-forged blank is placed in the precision forging die for precision forging, so that the shape and size of the precision forged blank meet the forging requirements.

[0013] The precision forging blank is trimmed using a trimming punch and a trimming die for the brushless claw blank.

[0014] Preferably, it further includes: controlling the material temperature of the billet when it exits the furnace after upsetting to 1150℃±35℃.

[0015] Preferably, it further includes: requiring the upper and lower die runout of the pre-forging part to be ≤1.2mm and the upper and lower die misalignment to be ≤1.2mm during the pre-forging process.

[0016] Preferably, it further includes: requiring the runout of the upper and lower dies of the precision forging part to be ≤0.6mm during precision forging.

[0017] Preferably, it further includes: deburring the blank after red-cutting.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The contact block in this application reduces the contact area between the cavity sidewall and the claw pole. During hot cutting, the die cutting edge is a critical stress-bearing part. With a reduced contact area, the material flows more smoothly, the extrusion pressure that was originally generated by the large contact area is dispersed, the extrusion stress on the die cutting edge is significantly reduced, and thermal wear is also reduced accordingly. This avoids the die from rapid failure due to stress concentration and excessive wear, thereby greatly extending the die's service life, reducing the frequency of die replacement, and improving production continuity. Attached Figure Description

[0020] Figure 1 This utility model provides a schematic diagram of a cutting die for a brushless claw electrode blank. Figure 1 ;

[0021] Figure 2 This utility model provides a schematic diagram of a cutting die for a brushless claw electrode blank. Figure 2 .

[0022] In the diagram: 1. Die body; 2. Trimmed cavity; 3. Trimmed protrusion; 4. Contact block. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0026] Reference Figures 1-2 As shown.

[0027] The embodiments further illustrate the edge-cutting die and processing technology of the brushless claw electrode blank proposed in this utility model.

[0028] A cutting edge die for a brushless claw electrode blank includes a die body 1, a cutting edge cavity 2 is provided in the middle of the die body 1, the side wall of the cutting edge cavity 2 is integrally formed with a cutting edge protrusion 3 that matches the cutting edge of the brushless claw electrode, and a contact block 4 is fixedly connected to the cutting edge protrusion 3 at the bottom of the cutting edge cavity 2, the thickness of the contact block 4 being 0.5mm-1mm.

[0029] The trimming cavity 2, located in the middle of the die body 1, is used to accommodate the brushless claw electrode blank to be processed. During the trimming operation, the brushless claw electrode blank is placed inside the trimming cavity 2. The trimming protrusion 3, integrally formed on the side wall of the trimming cavity 2, matches the trimming part of the brushless claw electrode and conforms to the contour of the claw electrode to be trimmed. At this time, the contact block 4, with a thickness controlled between 0.5mm and 1mm, is fixedly connected to the trimming protrusion 3 at the bottom of the trimming cavity 2. The contact block 4 first contacts the claw electrode blank. Under the action of the cutting force, the cutting protrusion 3 cooperates with the contact block 4 to guide the material flow and perform cutting operation on the claw pole. The appropriate thickness of the contact block 4 not only ensures effective contact with the claw pole and transmits the cutting force to achieve cutting, but also reduces the contact area with the claw pole due to its thin size, thereby reducing the extrusion pressure and friction generated during the cutting process, making the cutting smoother. This helps the cutting die to complete the cutting process of the brushless claw pole blank efficiently and stably, ensuring the dimensional accuracy and quality of the claw pole after cutting. At the same time, the reasonable structural design also helps to improve the overall durability and service life of the die.

[0030] Meanwhile, the design of contact block 4 reduces the contact area between the cavity sidewall and the claw pole, making the material flow smoother during hot cutting. The compressive stress and thermal wear on the die cutting edge are significantly reduced, thus greatly extending the die life.

[0031] The cutting edge protrusions 3 are arranged in a circular pattern at equal intervals on the side wall of the cutting edge cavity 2.

[0032] In this application, the cutting protrusions 3 are circumferentially and equidistantly arranged on the sidewall of the cutting cavity 2. This arrangement allows the cutting force to be evenly distributed around the claw electrode. When the claw electrode blank is placed into the cavity for cutting, the cutting protrusions 3 precisely fit the part of the claw electrode to be cut. Under the action of the cutting force, the circumferentially and equidistantly arranged cutting protrusions 3 perform the cutting action on the edge of the claw electrode, causing the material to flow along a reasonable path. In conjunction with the contact block at the bottom of the cavity, the stress and material flow state during cutting are optimized, making the cutting process smoother, improving cutting quality and efficiency, and helping the mold to stably and efficiently complete the cutting of the brushless claw electrode blank.

[0033] The height of the die body 1 is 1.5-10mm, which is compatible with the size of the brushless claw electrode blank and the edge trimming process requirements.

[0034] A processing method for a brushless claw electrode blank, the processing method comprising the following steps:

[0035] The raw material is heated to the forging temperature;

[0036] Upsetting process is performed on the heated raw material blank;

[0037] The blank that has been upset is pre-forged in a pre-forging die so that the shape and size of the pre-forged blank meet the forging requirements.

[0038] The pre-forged blank is placed in the precision forging die for precision forging, so that the shape and size of the precision forged blank meet the forging requirements.

[0039] The precision forging blank is trimmed using a trimming punch and a trimming die for the brushless claw blank.

[0040] This application first heats the raw material to the forging temperature, creating conditions for subsequent plastic deformation and making the material malleable. Next, upsetting is performed, using pressure to change the shape of the material and initially regulate the blank's form. In the pre-forging stage, the upset blank is placed in a pre-forging die, and pressure is applied through the die cavity constraint. During finish forging, the pre-forged blank is placed in a finish forging die, ensuring that the blank's shape and dimensions strictly conform to the forging requirements. Using a trimming punch and a trimming die, the finish-forged blank is trimmed to remove excess material, ensuring the brushless claw blank reaches the final dimensional and appearance standards.

[0041] It also includes: the temperature of the billet when it exits the furnace after the upsetting process is controlled at 1150℃±35℃.

[0042] This application utilizes billets within this temperature range after upsetting. On one hand, the suitable high temperature maintains the billet's good plasticity, laying the foundation for subsequent pre-forging and precision forging processes. On the other hand, it ensures more stable hot working properties of the billet throughout the entire processing flow, facilitating smooth transitions between processes, improving the processing quality and efficiency of brushless claw electrode blanks, and ensuring that the final product, after edge trimming and other treatments, meets production requirements.

[0043] It also includes: during the pre-forging process, the runout of the upper and lower dies of the pre-forged part should be ≤1.2mm, and the misalignment of the upper and lower dies should be ≤1.2mm.

[0044] During pre-forging, the molds must be properly aligned. Controlling the runout of the upper and lower molds within a reasonable range ensures uniform force distribution when the molds close, preventing uneven pressure on the billet during pre-forging due to excessive local runout, thus avoiding inconsistent local deformation of the billet. Furthermore, the strict limitation of misalignment between the upper and lower jaws ensures precise alignment of the mold cavities, allowing the billet to deform according to the preset shape and size within the pre-forging mold. This guarantees that the outline and dimensions of the pre-forged billet meet the requirements of the precision forging process.

[0045] It also includes: requiring the runout of the upper and lower dies of the precision forging part to be ≤0.6mm during precision forging.

[0046] This application limits the runout of the upper and lower dies in precision forging, which plays a crucial role in machining quality. When the precision forging process initiates the upper and lower die closing to perform secondary shaping on the pre-forged blank, the minimal die set runout ensures precise mold cavity fit. The stable and precise die fit allows the blank to be evenly stressed during precision forging, preventing localized pressure anomalies caused by die runout and ensuring the dimensional accuracy, shape accuracy, and surface quality of the finished precision-forged blank.

[0047] It also includes: deburring the blank after red-cutting.

[0048] In the processing of brushless gripper blanks, the red-edge trimming process can cause burrs to form on the edges of the blank due to material separation. If these burrs remain, they can affect subsequent assembly and performance, and may even pose safety hazards. Therefore, a deburring operation is added after red-edge trimming. Appropriate processes such as grinding and cutting are used to clean the burrs on the blank edges, making the blank surface smoother, ensuring smooth operation of subsequent processes, and improving the overall quality of the brushless gripper blank.

[0049] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A cutting die for a brushless claw electrode blank, comprising a die body (1), characterized in that, The die body (1) has a slit cavity (2) in the middle. The side wall of the slit cavity (2) is integrally formed with a slit protrusion (3) that matches the slit edge of the brushless claw pole. A contact block (4) is fixedly connected to the slit protrusion (3) at the bottom of the slit cavity (2). The thickness of the contact block (4) is 0.5mm-1mm.

2. The edge-cutting die for a brushless claw electrode blank according to claim 1, characterized in that, The tangent protrusions (3) are arranged circumferentially and equidistantly on the sidewall of the tangent cavity (2).

3. The edge-cutting die for a brushless claw electrode blank according to claim 2, characterized in that, The height of the die body (1) is 1.5-10mm.

Images