Forming method for forging connecting seat and blank making die

Abstract

The invention belongs to the technical field of connecting seat forging methods, and particularly relates to a connecting seat forging forming method which comprises the steps that a square raw material is placed in a V-shaped groove of a lower blank making die, and the upper edge and the lower edge of the square raw material are made to be opposite or staggered; making the square raw material into an L-shaped blank by making a V-shaped bulge on the upper blank making mold contact with the upper edge and pressing downwards; and the L-shaped blank is put into a finish forging die to be subjected to finish forging. The forming method can reduce the waste of raw materials, shorten the processing time and improve the product quality.

Description

Technical Field

[0001] This invention belongs to the technical field of connecting seat forging methods, specifically relating to a forming method and blanking mold for forging connecting seats. Background Technology

[0002] like Figure 5 As shown, the connecting seat of the hydraulic support accessory for coal mines, due to its special geometry, is typically manufactured using two traditional processes: one is casting to obtain the blank, and the other is cutting thick steel plates. However, both of these traditional processes have significant drawbacks, making it difficult for the product to meet requirements in terms of quality, cost, and efficiency.

[0003] Low raw material utilization (for steel plate cutting): When using a thick steel plate cutting method, due to the complex and irregular shape of the connecting seat, a large amount of excess material needs to be removed from the entire steel plate to obtain the required contour. This processing method results in serious material waste, with a raw material utilization rate of usually less than 40%, meaning that more than 60% of the expensive steel becomes scrap during processing, directly increasing production costs.

[0004] Low processing efficiency and high cost (a common problem): Whether it's a cast blank or a cut steel plate, the subsequent machining process is extremely complicated. To achieve the final design precision and complex structural features, multiple processing steps are required. This not only significantly extends processing time but also means investing more manpower, equipment resources, and energy consumption, ultimately resulting in high overall processing costs and low production efficiency.

[0005] High risk of internal quality defects (for cast blanks): When using casting processes to produce blanks, the biggest hidden danger lies in the difficulty of precisely controlling the internal quality of the blanks. Internal defects such as porosity, shrinkage cavities, inclusions, and cold shuts are easily generated during the casting process, and the grain structure of the castings is often relatively coarse or uneven. These inherent defects and structural problems are difficult to completely eliminate in subsequent processing, becoming weak points within the product.

[0006] Poor performance and reliability of finished products: Whether due to internal structural porosity and inclusions from casting, or potential material selection or processing stress issues due to low material utilization, the final machined connector often exhibits poor overall mechanical properties (especially critical impact toughness). During actual equipment operation, this component frequently needs to withstand dynamic loads, vibrations, or impacts. Insufficient performance makes the connector a weak point, leading to frequent fracture failures. This not only affects the normal operation of the equipment but also results in downtime for maintenance, safety hazards, and additional maintenance costs. Summary of the Invention

[0007] To address the aforementioned technical problems, one objective of this invention is to provide a forming method for forging a connecting seat, which can reduce the waste of raw materials, shorten processing time, and improve product quality; another objective of this invention is to provide a blanking mold for implementing the above forming method.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A forming method for forging a connecting seat involves placing a square raw material in a V-shaped groove of a lower blanking mold, such that the upper and lower edges of the square raw material are opposite or staggered; pressing down on the upper blanking mold by contacting the V-shaped protrusions with the upper edges to form an "L"-shaped blank; and finally placing the "L"-shaped blank into a final forging mold for final forging. The upper and lower edges are opposite each other, meaning that the line connecting the upper and lower edges is a vertical line; the upper and lower edges are opposite each other, meaning that the line connecting the upper and lower edges is an inclined line.

[0009] The square raw material is square steel.

[0010] The upper and lower edges of the square raw material are staggered, resulting in an "L"-shaped blank with different thicknesses on both sides.

[0011] The contact surface between the V-shaped protrusion and the upper edge is an arc-shaped surface.

[0012] A forging die for a connecting seat includes an upper die and a lower die; the upper die and the lower die are arranged opposite to each other, the upper die has a V-shaped protrusion, and the lower die has a V-shaped groove.

[0013] The protrusion of the V-shaped protrusion is arc-shaped.

[0014] The lower blanking mold is slidably connected to a pusher block; the blank in the V-shaped groove is pushed out by the movement of the pusher block.

[0015] The upper blanking mold and the lower blanking mold are slidably connected.

[0016] The upper blanking mold is provided with guide posts, and the lower blanking mold is provided with guide grooves that cooperate with the guide posts.

[0017] The lower blanking mold is provided with two guide protrusions, and there is a gap between the two guide protrusions to form a guide groove.

[0018] Compared with the prior art, the beneficial effects of this invention are: 1. Raw material saving: The utilization rate of raw steel plate blanks is low, less than 40%. This invention adopts direct forging and then processing, and the single-sided processing allowance of the blank is only 0-2mm, which saves about 45% of the material compared with the raw steel plate blank.

[0019] 2. Time saving: Traditional steel plate blanking involves flame cutting to create the shape before surface processing. This process takes up about 2 / 3 of the total processing time for the connecting seat. In contrast, this invention is forged directly with uniform machining allowance, ensuring the surface finish of the product during later processing. The processing time for the workpiece of this invention is only 1 / 2 of that for free forging blanks, greatly reducing energy consumption and improving production efficiency.

[0020] 3. Improved Product Quality: Traditional processes cut the metal flow lines (fiber structure) of the finished connector in the middle, and the direction of the metal flow lines is parallel to the force direction of the connector body, which greatly weakens the tensile strength and impact resistance of the parts and reduces their service life. This invention uses square steel billets, and then the high-quality alloy steel is placed directly into the mold for multiple blows in the final forging process to finally form the connector body. The metal flow lines (fiber structure) of the connector body are evenly distributed along the shape, and the continuity of the metal flow lines (fiber structure) will not be destroyed in subsequent processing. The direction of the metal flow lines is perpendicular to the force direction of the teeth, which greatly improves the tensile strength and impact resistance of the teeth and increases their service life. Attached Figure Description

[0021] Figure 1 (a) is a schematic diagram of the structure after the square raw material is placed in Embodiment 1 of the present invention; Figure 1 (b) is a schematic diagram of the structure of the square raw material after pressing in Embodiment 1 of the present invention; Figure 2 (a) is a schematic diagram showing the relative state of the upper and lower edges of the square raw material of the present invention; Figure 2 (b) is a schematic diagram of the staggered state of the upper and lower edges of the square raw material of the present invention; Figure 3 This is a schematic diagram of the blanking mold of Embodiment 2 of the present invention; Figure 4 This is a cross-sectional view of the blanking mold of Embodiment 2 of the present invention; Figure 5 This is a structural schematic diagram of the finished connector; Figure 6 This is a partial structural schematic diagram of the final forging die of the present invention; Figure 7 This is a schematic diagram of the metal flow lines of the finished connecting base of the present invention; Wherein: 1 is the upper blanking mold, 2 is the lower blanking mold, 3 is the V-shaped protrusion, 4 is the V-shaped groove, 5 is the protrusion, 6 is the push block, 7 is the guide post, 8 is the guide groove, 9 is the guide protrusion, 10 is the square raw material, 11 is the blank, A is the included angle, 12 is the hinge ear, and 13 is the rod. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example 1

[0023] A forming method for forging a connecting seat involves first placing a square raw material 10 in the V-shaped groove 4 of the lower blanking mold 2, and then supporting the square raw material 10 through the V-shaped groove 4.

[0024] like Figure 1 As shown in Figure a, after the square material 10 is placed in the V-shaped groove 4, the upper edge and the lower edge of the square material 10 are staggered.

[0025] like Figure 1 As shown in Figure b, the V-shaped protrusion 3 on the upper blanking mold 1 contacts and presses down on the upper edge of the square raw material 10, forming an "L"-shaped blank 11. Finally, the "L"-shaped blank 11 is placed into the final forging mold for final forging. The shape of the final forging mold is determined according to the shape of the product (e.g., ...). Figure 5 (As shown in the image) For details, please refer to the design. Figure 6 Design of intermediate and final forging die.

[0026] like Figure 7 As shown, the finished connecting seat body obtained by the above molding method has metal flow lines (fiber structure) evenly distributed in the connecting seat body, and maintains good continuity in subsequent processing. Its direction is perpendicular to the direction of tooth force, which significantly improves the tensile strength, impact resistance and service life of the tooth.

[0027] The aforementioned square raw material 10 refers to a raw material with a square cross-section; "L"-shaped refers to a raw material with an "L"-shaped cross-section.

[0028] like Figure 2 As shown in Figure a, "the upper edge and the lower edge are opposite" means that the line connecting the upper edge and the lower edge is a vertical line; as shown in Figure a. Figure 2 As shown in Figure b, the upper and lower edges being staggered means that the line connecting the upper and lower edges is an inclined line.

[0029] Furthermore, the square raw material 10 is preferably square steel.

[0030] Furthermore, after the square raw material 10 is placed, when its upper and lower edges are staggered, the resulting "L"-shaped billet 11 has different thicknesses on both sides. The thicker side corresponds to the hinge lug 12 area of ​​the connecting seat, while the thinner side corresponds to the rod 13 area of ​​the connecting seat. This ensures that there is sufficient processing material in the hinge lug 12 area during the final forging process, while the rod 13 will not have excessive processing material. This further reduces raw material waste while ensuring the quality of the final forging.

[0031] Furthermore, the contact surface between the V-shaped protrusion 3 and the upper edge is an arc surface; through the contact between the arc surface and the upper edge, the middle part of the "L"-shaped blank 11 can have a smooth transition with an arc chamfer, avoiding defects such as cracks.

[0032] By directly forging the connecting seat, less machining allowance is required, saving materials, reducing machining steps and time, and improving processing efficiency. The metal flow lines (fibrous structure) of the die-forged connecting seat are evenly distributed along the outer shape, and the continuity of the metal flow lines (fibrous structure) will not be destroyed during subsequent processing. The direction of the metal flow lines is perpendicular to the direction of force, which greatly improves the tensile strength and impact resistance of the teeth and extends service life. Example 2

[0033] like Figure 3 and 4 As shown, a blanking mold includes an upper blanking mold 1 and a lower blanking mold 2. The upper blanking mold 1 and the lower blanking mold 2 are arranged opposite to each other and are installed on a hydraulic press during use. The upper blanking mold 1 has a V-shaped protrusion 3, and the lower blanking mold 2 has a corresponding V-shaped groove 4. After a square raw material 10 is placed in the V-shaped groove 4, the square raw material 10 is pressed down by the V-shaped protrusion 3 on the upper blanking mold 1 contacting the upper edge of the square raw material 10, thus forming an "L"-shaped blank 11.

[0034] Specifically: the angle of the V-shaped groove 4 is 90°; by changing the included angle A between the V-shaped groove 4 and the horizontal plane, the upper and lower edges of the square material 10 can be made to be opposite or staggered after the square material 10 is placed.

[0035] like Figure 2 The included angle A shown in the middle a is greater than Figure 2 Angle A shown in b, Figure 2 The upper and lower edges of the square raw material 10 corresponding to 'a' are opposite each other, while Figure 2 The upper and lower edges of the square raw material 10 corresponding to b are staggered.

[0036] Furthermore, the protrusion 5 of the V-shaped protrusion 3 is arc-shaped, that is, the contact surface between the V-shaped protrusion 3 and the square raw material 10 is an arc-shaped surface.

[0037] Furthermore, the lower blanking mold 2 is slidably connected to a push block 6; the push block 6 is connected to the ejection cylinder of the hydraulic press, and the push block 6 is moved by the ejection cylinder to eject the "L"-shaped blank 11 made in the V-shaped groove 4.

[0038] Furthermore, the upper blanking mold 1 and the lower blanking mold 2 are slidably connected, which can prevent the upper blanking mold 1 from shifting during its downward movement.

[0039] Furthermore, various structures can be used to achieve a sliding connection between the two, for example: a guide post 7 is provided on the upper blanking mold 1, and a guide groove 8 that cooperates with the guide post 7 is provided on the lower blanking mold 2.

[0040] Furthermore, a guide groove 8 can be directly opened on the lower blanking mold 2; however, in order to avoid reducing the strength of the lower blanking mold 2, two guide protrusions 9 can be set on the lower blanking mold 2, with a gap between the two guide protrusions 9, and the guide groove 8 is formed by the two spaced guide protrusions 9.

[0041] The above description only illustrates preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

Claims

1. A forming method for forging a connecting seat, characterized in that: The square raw material is placed in the V-shaped groove of the lower blanking mold, so that the upper and lower edges of the square raw material are opposite or staggered; the square raw material is formed into an "L" shaped billet by contacting and pressing down with the V-shaped protrusion on the upper blanking mold; the "L" shaped billet is placed into the final forging mold for final forging. The upper and lower edges are opposite each other, meaning that the line connecting the upper and lower edges is a vertical line; the upper and lower edges are opposite each other, meaning that the line connecting the upper and lower edges is an inclined line.

2. The forming method for forging a connecting seat according to claim 1, characterized in that: The square raw material is square steel.

3. The forming method for forging a connecting seat according to claim 1, characterized in that: The upper and lower edges of the square raw material are staggered, resulting in an "L"-shaped blank with different thicknesses on both sides.

4. The forming method for forging a connecting seat according to claim 1, characterized in that: The contact surface between the V-shaped protrusion and the upper edge is an arc-shaped surface.

5. A forging die for a connecting seat, characterized in that: It includes an upper blanking mold (1) and a lower blanking mold (2); the upper blanking mold (1) and the lower blanking mold (2) are arranged opposite to each other, the upper blanking mold (1) is provided with a V-shaped protrusion (3), and the lower blanking mold (2) is provided with a V-shaped groove (4).

6. The forging die for a connecting seat according to claim 5, characterized in that: The protrusion (5) of the V-shaped protrusion (3) is arc-shaped.

7. A forging die for a connecting seat according to claim 5, characterized in that: The lower blanking mold (2) is slidably connected to a pusher block (6); the blank (11) in the V-shaped groove (4) is pushed out by the movement of the pusher block (6).

8. A forging die for a connecting seat according to claim 5, characterized in that: The upper blanking mold (1) and the lower blanking mold (2) are slidably connected.

9. A forging die for a connecting seat according to claim 8, characterized in that: The upper blanking mold (1) is provided with a guide post (7), and the lower blanking mold (2) is provided with a guide groove (8) that cooperates with the guide post (7).

10. A forging die for a connecting seat according to claim 8, characterized in that: The lower blanking mold (2) is provided with two guide protrusions (9), and there is a gap between the two guide protrusions (9) to form a guide groove (8).

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