Pole forming method
Through the multi-stage pier press forming method and the multi-stage pier press forming method, the problem of high manufacturing cost of the existing pole column forming method is solved, and lower manufacturing cost and higher manufacturing efficiency are achieved.
Patent Information
- Application Number
- CN202510395418.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-06-20
AI Technical Summary
The existing pole column forming methods have high manufacturing costs, mainly due to the low CNC machining utilization rate and the need for large-scale equipment in the pier pressing process, which leads to the initial investment in the Yamato molds that are prone to damage.
A multi-stage pier pressing method is adopted, including forming a blasting piece in a flattening mold, then forming a rough blasting piece in a thick pier mold, and finally forming a pole column in a fine pier mold. This method promotes material flow and uniformity of the mold by forming specific structures on the embryo material and the crude embryo, such as flat surface bottom surfaces, bosses and inclined annular surfaces.
The manufacturing cost of pole forming is reduced, manufacturing efficiency is improved, the risk of mold damage is reduced, and the difficulty of pier forming is reduced.
Smart Images
Figure CN120169998A_ABST
Abstract
Description
Technical Field
[0001] This invention patent relates to the technical field of pole riveting, and specifically, to a method for forming a pole. Background Art
[0002] The pole is an important component in a battery. It is arranged in the top cover piece and is used to achieve the connection between the battery and the outside. One end of the pole is connected to the bus bar inside the battery, and the other end is connected to an external conductor.
[0003] Currently, poles are divided into positive poles and negative poles. The negative pole is generally made of copper or a copper-aluminum composite material, and the positive pole is generally made of aluminum.
[0004] In the prior art, the methods for forming poles mainly include upsetting or CNC machining. Since the materials used for poles are copper and aluminum, the utilization rate of poles processed by CNC machining is low, resulting in a relatively high manufacturing cost for poles processed by CNC machining. The upsetting process requires a large equipment tonnage to achieve the compression deformation of the metal. The initial investment in equipment is large, and the mold bears a large pressure, which may cause the mold to wear or be damaged and needs to be replaced regularly, resulting in a high manufacturing cost. Summary of the Invention
[0005] The purpose of this invention is to provide a method for forming a pole, aiming to solve the problem of high manufacturing cost in the prior art for the method of forming a pole.
[0006] This invention is implemented as follows. The method for forming a pole includes the following forming steps:
[0007] 1), Provide a cylindrical round bar made of a metal material, place the round bar in a flattening mold and upset it to form a blank piece, and the bottom of the blank piece is upset to form a flat bottom surface.
[0008] 2), Place the blank piece in a rough upsetting mold and upset it into a rough blank piece. A rough blank plate is formed at the lower part of the rough blank piece. Two spaced-apart and side-by-side convex platforms are formed by the protrusion at the top of the rough blank plate. An upper column is formed on the convex platform. A waste ring is formed on the outer periphery of the rough blank plate. An inclined ring surface is formed at the top of the convex platform. Along the upper column to the outer periphery of the convex platform, the inclined ring surface is arranged to slope downward.
[0009] 3), Place the rough blank piece in a fine upsetting mold and upset it into a fine blank piece. The convex platforms of the rough blank plate are upset to be flat, the rough blank plate forms a column plate body, the upper column is upset to a set height to form a column head docked on the column plate body, the column plate body and the column head form a pole, and the waste ring is formed on the outer periphery of the column plate body.
[0010] 4), Cut off the waste ring to obtain two formed poles.
[0011] Further, in the forming step 1), the flattening die includes a flattening lower die and a flattening upper die located above the flattening lower die. A flattening lower cavity is formed in the flattening lower die, and a flat groove bottom surface is formed at the bottom of the flattening lower cavity. The lower part of the round rod body is placed in the flattening lower cavity, and the bottom of the round rod body is placed on the groove bottom surface. The flattening upper die presses the round rod body from top to bottom until the round rod body is upset to form the blank part.
[0012] Further, in the forming step 1), a flattening upper cavity is provided in the flattening upper die, and the top of the flattening upper cavity is arranged in an arc shape. After the lower part of the round rod body is placed in the flattening lower cavity, the flattening upper die moves towards the flattening lower die, the upper part of the round rod body is placed in the flattening upper cavity, and the top of the flattening upper cavity is arranged in contact with the upper part of the round rod body.
[0013] Further, in the forming step 1), a longitudinal groove is formed in the flattening lower die. The longitudinal groove penetrates the bottom of the flattening lower cavity to form a groove opening. A punch plate is fixedly arranged in the longitudinal groove, and the upper part of the punch plate passes through the groove opening and extends into the longitudinal groove.
[0014] In the forming step 1), after the round rod body is placed in the flattening lower cavity, the bottom of the round rod body abuts against the punch plate. During the process of the flattening upper die upsetting the round rod body, the punch plate forms a positioning groove in the middle of the round rod body.
[0015] Further, in the forming step 2), the rough upsetting die includes a rough upsetting lower die and a rough upsetting upper die located above the rough upsetting lower die. A rough upsetting lower cavity is formed in the rough upsetting lower die, and the bottom of the rough upsetting lower cavity is flat. A rough upsetting upper cavity is formed in the rough upsetting upper die. A rough upsetting column cavity is formed in the upper part of the rough upsetting upper cavity, and a rough upsetting table cavity is formed in the lower part of the rough upsetting upper cavity.
[0016] In the forming step 2), the bottom surface of the blank part abuts against the bottom of the rough upsetting lower cavity. The rough upsetting upper die upsets the blank part, and the blank part flows towards the rough upsetting upper cavity to form the rough blank part. The rough blank plate is placed in the rough upsetting lower cavity, the convex platform is placed in the rough upsetting table cavity, the upper column is placed in the rough upsetting column cavity, and the waste ring is formed between the rough upsetting upper die and the rough upsetting lower die.
[0017] Further, in the forming step 2), the inclination angle range of the inclined ring surface is between 8° and 15°.
[0018] Further, in the forming step 3), the fine upsetting die includes a fine upsetting lower die and a fine upsetting upper die located above the fine upsetting lower die. A fine upsetting upper cavity is formed in the fine upsetting upper die, and a fine upsetting lower cavity is formed in the fine upsetting lower die.
[0019] In the forming step 3), the rough blank plate of the rough blank part is placed in the fine upsetting lower cavity, and the fine upsetting upper die presses against the rough blank part to form the fine blank part from the rough blank part. The column plate body is formed in the fine upsetting lower cavity, and the column head is formed in the fine upsetting upper cavity.
[0020] Further, in the construction step 3), during the process that the fine upsetting upper die presses downward on the rough blank part, the fine upsetting upper die presses on the inclined annular surface of the upsetting boss until the inclined annular surface is pressed into a flat shape, and the rough blank plate forms the column plate body.
[0021] Further, during the process that the fine upsetting upper die presses downward on the rough blank part, the upper column is placed in the fine upsetting upper cavity, and the fine upsetting upper die presses on the upper column until the upper column is pressed to a set height to form the column head.
[0022] Further, in the forming step 2), after the blank part is upset into the rough blank part by the rough upsetting die, a rounded corner transition part is formed between the bottom of the upper column and the boss. The rounded corner transition part is arranged in a circumferential direction around the upper column;
[0023] In the forming step 3), during the process that the fine upsetting upper die presses downward on the rough blank part, after the inclined annular surface is pressed into a flat shape, the rounded corner transition part is pressed into a right angle shape.
[0024] Compared with the prior art, for the pole column forming method provided by the present invention, firstly, a flat bottom surface is formed on the blank part, which is convenient for positioning the blank part and preventing it from moving during the upsetting process; secondly, a boss is formed on the rough blank part, and the boss has an inclined annular surface. When the rough blank part is upset into the fine blank part, it is convenient for the flow of materials, reduces the deformation of materials, reduces the pressure on the fine upsetting die, and reduces the difficulty of upsetting and forming; in addition, two bosses arranged side by side at intervals are formed on the rough blank part, which is convenient for the flow of materials, and the force on the die is more uniform, reducing the risk of die damage, reducing the manufacturing cost, and greatly improving the manufacturing efficiency. Description of the Drawings
[0025] Figure 1 is the three-dimensional flow chart of pole column forming of the pole column forming method provided by the present invention;
[0026] Figure 2 is the three-dimensional flow chart of the pole column forming process of the pole column forming method provided by the present invention;
[0027] Figure 3 is the three-dimensional schematic diagram of the flattening lower die provided by the present invention. Detailed Embodiments
[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0029] The implementation of the present invention is described in detail below in conjunction with specific embodiments.
[0030] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0031] Reference Figures 1-3 The figure shows a preferred embodiment of the present invention.
[0032] The pole forming method comprises the following forming steps:
[0033] 1) Provide a cylindrical round rod 100 made of metal material, place the round rod 100 in a flattening mold to form a blank 200, and press the bottom of the blank 200 to form a flat bottom surface 201;
[0034] 2) placing the blank 200 in a rough forging mold and forming it into a rough blank 300, the lower part of the rough blank 300 forms a rough blank plate, the top of the rough blank plate bulges to form two spaced and side-by-side bosses 305, the bosses 305 are formed with upper columns 301, and the outer periphery of the rough blank plate is formed with a waste ring 303; the top of the boss 305 forms an inclined annular surface 302, and the inclined annular surface 302 is arranged downward along the upper column 301 to the outer periphery of the boss 305;
[0035] 3) The rough blank 300 is placed in a fine blank mold and pressed to form a fine blank 400. The boss 305 of the rough blank is pressed to a flat state, the rough blank forms a column body 402, the upper column 301 is pressed to a set height, and a column head 401 is formed to dock with the column body 402. The column body 402 and the column head 401 form a pole 500, and a waste ring 303 is formed on the outer periphery of the column body 402;
[0036] 4) Cut off the waste ring 303 to obtain two formed poles 500.
[0037] For the above - provided pole - forming method, first, a flat bottom surface 201 is formed on the blank part 200, which facilitates the positioning of the blank part 200 and prevents it from moving during the upsetting process of the blank part 200. Second, a boss 305 is formed on the rough blank part 300, and the boss 305 has an inclined annular surface 302. When the rough blank part 300 is upset into the fine blank part 400, it facilitates the flow of materials, reduces the deformation of materials, reduces the pressure on the fine - upsetting die, and reduces the difficulty of upset - forming. Additionally, two bosses 305 arranged side - by - side with a gap are formed on the rough blank part 300, which facilitates the flow of materials, makes the force on the die more uniform, reduces the risk of die damage, reduces the manufacturing cost, and greatly improves the manufacturing efficiency.
[0038] Before manufacturing, according to the size of the pole 500 and the forming steps, select the corresponding bar. Calculate the required length of the bar based on the volume of the pole 500, and cut the bar to the required length using a cutting device to form a round bar body 100.
[0039] In this embodiment, in forming step 1), the flattening die includes a flattening lower die 602 and a flattening upper die 601 located above the flattening lower die 602. A flattening lower cavity 604 is formed in the flattening lower die 602, and a flat - surface - shaped groove bottom surface 605 is formed at the bottom of the flattening lower cavity 604. The lower part of the round bar body 100 is placed in the flattening lower cavity 604, and the bottom of the round bar body 100 is placed on the groove bottom surface 605. The flattening upper die 601 presses the round bar body 100 from top to bottom until the round bar body 100 is upset to form the blank part 200.
[0040] During the upsetting process of the round bar body 100 in the flattening die, since the groove bottom surface 605 is flat - surface - shaped, the bottom of the round bar body 100 is formed into the corresponding bottom surface 201.
[0041] In this embodiment, in forming step 1), a flattening upper cavity is provided in the flattening upper die 601, and the top of the flattening upper cavity is arranged in an arc - surface shape. After the lower part of the round bar body 100 is placed in the flattening lower cavity 604, the flattening upper die 601 moves towards the flattening lower die 602, the upper part of the round bar body 100 is placed in the flattening upper cavity, and the top of the flattening upper cavity is arranged in contact with the upper part of the round bar body 100.
[0042] In this way, the shape of the flattening upper cavity is arranged in contact with the upper part of the round bar body 100. During the upsetting process of the round bar body 100, the upper part of the round bar body 100 does not deform, and the deformation is concentrated at the bottom of the round bar body 100, so that the bottom of the round bar body 100 is formed into the bottom surface 201.
[0043] In this embodiment, in forming step 1), the flattening lower die 602 has longitudinal grooves 607. The longitudinal grooves 607 penetrate through the bottom of the flattening lower cavity 604 to form groove openings. A punch plate 606 is fixedly arranged in the longitudinal grooves 607. The upper part of the punch plate 606 passes through the groove opening and extends into the longitudinal grooves 607.
[0044] In forming step 1), after the round rod body 100 is placed in the flattening lower cavity 604, the bottom of the round rod body 100 abuts against the punch plate 606. During the process of the flattening upper die 601 pressing down on the round rod body 100, the punch plate 606 forms a positioning groove 202 in the middle of the round rod body 100.
[0045] By arranging the punch plate 606, a positioning groove 202 is formed in the middle of the formed blank part 200, so that the two sides of the blank part 200 are symmetrically arranged, and it is convenient for the subsequent placement and positioning of the blank part 200.
[0046] In this embodiment, the rough pressing die includes a rough pressing lower die 702 and a rough pressing upper die 701 located above the rough pressing lower die 702. The rough pressing lower die 702 has a rough pressing lower cavity, and the bottom of the rough pressing lower cavity is flat. The rough pressing upper die 701 has a rough pressing upper cavity. The upper part of the rough pressing upper cavity forms a rough pressing column cavity, and the lower part of the rough pressing upper cavity forms a rough pressing platform cavity.
[0047] In forming step 2), the bottom surface 201 of the blank part 200 abuts against the bottom of the rough pressing lower cavity. The rough pressing upper die 701 presses the blank part 200, and the blank part 200 flows towards the rough pressing upper cavity to form a rough blank part 300. The rough blank plate is placed in the rough pressing lower cavity, the convex platform 305 is placed in the rough pressing platform cavity, the upper column 301 is placed in the rough pressing column cavity, and a waste ring 303 is formed between the rough pressing upper die 701 and the rough pressing lower die 702.
[0048] The rough pressing die serves as a processing transition between the flattening die and the fine pressing die, presses the blank part 200 into a rough blank part 300, and forms a convex platform 305 on the rough blank plate, so as to facilitate the subsequent further pressing and processing of the rough blank part 300 to form a fine blank part 400.
[0049] In this embodiment, in forming step 2), the inclination angle range of the inclined ring surface 302 is between 8° and 15°. In this way, the pressure during the pressing process can be reduced, which is convenient for the flow of the material.
[0050] In this embodiment, in forming step 3), the fine pressing die includes a fine pressing lower die 802 and a fine pressing upper die 801 located above the fine pressing lower die 802. The fine pressing upper die 801 has a fine pressing upper cavity, and the fine pressing lower die 802 has a fine pressing lower cavity.
[0051] In forming step 3), the blank plate of the blank part 300 is placed in the fine upsetting lower cavity, and the fine upsetting upper die 801 presses against the blank part 300 so that the blank part 300 forms the fine blank part 400. The column plate body 402 is formed in the fine upsetting lower cavity, and the column head 401 is formed in the fine upsetting upper cavity.
[0052] In this embodiment, in construction step 3), during the process that the fine upsetting upper die 801 presses downward on the blank part 300, the fine upsetting upper die 801 presses the inclined ring surface 302 of the boss 305 until the inclined ring surface 302 is pressed into a flat shape, and the blank plate forms the column plate body 402.
[0053] By forming the inclined ring surface 302 on the boss 305, during the process that the fine upsetting upper die 801 presses the blank part 300, it first presses against the inclined ring surface 302, causing the material flow of the boss 305.
[0054] In this embodiment, during the process that the fine upsetting upper die 801 presses downward on the blank part 300, the upper column 301 is placed in the fine upsetting upper cavity, and the fine upsetting upper die 801 presses the upper column 301 until the upper column 301 is pressed to the set height to form the column head 401.
[0055] During the process that the fine upsetting upper die 801 presses the blank part 300, it presses the boss 305 to cause the material flow of the boss 305, and the blank plate forms the column plate body 402. Moreover, it should be noted that the upper column 301 is also pressed and formed to the set height to form the column head 401.
[0056] In this embodiment, in forming step 2), after the blank part 200 is pressed into the blank part 300 by the rough upsetting die, a fillet transition part 304 is formed between the bottom of the upper column 301 and the boss 305, and the fillet transition part 304 is arranged around the circumference of the upper column 301. In forming step 3), during the process that the fine upsetting upper die 801 presses downward on the blank part 300, after the inclined ring surface 302 is pressed into a flat shape, the fillet transition part 304 is pressed into a right-angled shape.
[0057] During the process that the blank part 200 is pressed to form the blank part 300, the upper column 301 and the boss 305 arch and form a stepped transition. At this time, a fillet transition part 304 is naturally formed between the upper column 301 and the boss 305, which is beneficial to the material flow.
[0058] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A pole forming method, characterized in that: The molding process includes the following steps: 1) Providing a cylindrical round rod made of metal material, placing the round rod in a flattening mold to form a blank, and pressing the bottom of the blank to form a flat bottom surface; 2) placing the blank in a rough forging mold and forming it into a rough blank, wherein the lower part of the rough blank forms a rough blank plate, the top of the rough blank plate protrudes to form two bosses arranged side by side at intervals, an upper column is formed on the boss, and a waste ring is formed on the periphery of the rough blank plate; an inclined annular surface is formed on the top of the boss, and the inclined annular surface is arranged to tilt downward along the upper column to the periphery of the boss; 3) placing the rough blank in a fine blank mold and forming it into a fine blank, the boss of the rough blank is pressed to a flat state, the rough blank forms a column body, the upper column is pressed to a set height to form a column head docked on the column body, the column body and the column head form a pole, and the waste ring is formed on the outer periphery of the column body; 4) Cut off the waste ring to obtain two formed poles.
2. The pole forming method according to claim 1, characterized in that: In the forming step 1), the flattening mold includes a flattening lower mold and a flattening upper mold located above the flattening lower mold, a flattening lower cavity is formed in the flattening lower mold, and the bottom of the flattening lower cavity forms a flat groove bottom surface; the lower part of the round rod body is placed in the flattening lower cavity, the bottom of the round rod body is placed on the groove bottom surface, and the flattening upper mold presses the round rod body from top to bottom until the round rod body is pressed to form the blank.
3. The pole forming method according to claim 2, characterized in that: In the forming step 1), a flattening upper cavity is provided in the flattening upper die, and the top of the flattening upper cavity is arranged in an arc shape; when the lower part of the round rod body is placed in the flattening lower cavity, the flattening upper die moves toward the flattening lower die, and the upper part of the round rod body is placed in the flattening upper cavity, and the top of the flattening upper cavity is arranged in a fit with the upper part of the round rod body.
4. The pole forming method according to claim 2, characterized in that: In the molding step 1), the flattening lower die has a longitudinal groove, the longitudinal groove passes through the bottom of the flattening lower cavity to form a groove opening; a fixed punch plate is provided in the longitudinal groove, and the upper part of the punch plate passes through the groove opening and extends into the longitudinal groove; In the forming step 1), after the round rod is placed in the flattening lower cavity, the bottom of the round rod abuts against the punch plate, and during the process of the flattening upper die pressing the round rod, the punch plate forms a positioning groove in the middle of the round rod.
5. The pole forming method according to any one of claims 1 to 4, characterized in that: In the forming step 2), the rough pier mold includes a rough pier lower mold and a rough pier upper mold located above the rough pier lower mold, the rough pier lower mold has a rough pier lower cavity, and the bottom of the rough pier lower cavity is flat; the rough pier upper mold has a rough pier upper cavity, the upper part of the rough pier upper cavity forms a rough pier column cavity, and the lower part of the rough pier upper cavity forms a rough pier abutment cavity; In the forming step 2), the bottom surface of the blank piece abuts against the bottom of the rough pier lower cavity, the rough pier upper mold presses the blank piece, and the blank piece flows toward the rough pier upper cavity to form the rough blank piece, the rough blank plate is placed in the rough pier lower cavity, the boss is placed in the rough pier abutment cavity, the upper column is placed in the rough pier column cavity, and the waste ring is formed between the rough pier upper mold and the rough pier lower mold.
6. The pole forming method according to any one of claims 1 to 4, characterized in that: In the molding step 2), the inclination angle of the inclined annular surface ranges from 8° to 15°.
7. The pole forming method according to any one of claims 1 to 4, characterized in that: In the molding step 3), the fine pier mold includes a fine pier lower mold and a fine pier upper mold located above the fine pier lower mold, the fine pier upper mold has a fine pier upper cavity, and the fine pier lower mold has a fine pier lower cavity; In the forming step 3), the rough blank of the rough blank is placed in the lower cavity of the fine blank, and the upper mold of the fine blank presses the rough blank to form the fine blank from the rough blank, the column plate body is formed in the lower cavity of the fine blank, and the column head is formed in the upper cavity of the fine blank.
8. The pole forming method according to claim 7, characterized in that: In the construction step 3), during the process of the fine pier upper die pressing the rough blank downward, the fine pier upper die presses the inclined annular surface of the boss until the inclined annular surface is pressed into a flat shape, and the rough blank plate forms a column plate body.
9. The pole forming method according to claim 7, characterized in that: During the process of the upper die of the fine pier pressing the rough blank downward, the upper column is placed in the upper cavity of the fine pier, and the upper die of the fine pier presses the upper column until the upper column is pressed to a set height to form the column head.
10. The pole forming method according to any one of claims 1 to 4, characterized in that: In the forming step 2), after the blank is pressed into a rough blank by the rough pressing mold, a rounded transition portion is formed between the bottom of the upper column and the boss, and the rounded transition portion is arranged around the circumference of the upper column; In the forming step 3), during the process of the fine punch upper die pressing the rough blank downward, when the inclined annular surface is pressed into a flat shape, the rounded transition portion is pressed into a right angle shape.