Blank manufacturing positioning tool and blank manufacturing method of V-shaped forge piece

Abstract

The invention relates to a blank manufacturing positioning tool and a blank manufacturing method of a V-like forge piece, and belongs to the technical field of V-like forge pieces. The blank making positioning tool is used for positioning a blank of the V-shaped forge piece, the blank is provided with a first supporting arm, a second supporting arm and an arc-shaped protruding part, the first supporting arm and the second supporting arm are connected to form a V-shaped structure with the inner angle larger than 90 degrees, and the arc-shaped protruding part is connected to the connecting position of the first supporting arm and the second supporting arm. The die cavity is formed by splicing a first straight groove, a second straight groove and an arc-shaped groove, the other end of the first straight groove forms a first bayonet, and the other end of the second straight groove forms a second bayonet; when a blank is loaded into the die cavity, the first supporting arm is contained in the first straight groove, the end of the first supporting arm is clamped in the first clamping opening, the second supporting arm is contained in the second straight groove, the end of the second supporting arm is clamped in the second clamping opening, and the arc-shaped convex part is clamped in the arc-shaped groove, so that the blank is positioned in the die cavity. According to the method, the blank-making positioning tool is used for making the blank of the V-shaped forge piece into the rough blank.

Description

Technical Field

[0001] The invention belongs to the technical field of V-shaped forgings, and in particular relates to a blank making tool and a blank manufacturing method of a V-shaped forging. Background Art

[0002] V-shaped forgings are non-standard special-shaped products. The forging process includes blank making, pre-forging and final forging. Blank making and final forging are usually completed with the help of final forging dies and large forging equipment. However, due to its special shape and lack of suitable blank positioning tooling, the existing technology usually adopts the method of die filling to make blanks. The specific method of die filling is as follows:

[0003] First, a larger-sized billet is obtained, and then a mold with a cavity is used to press the billet from the middle, so that the material in the middle of the billet enters the cavity of the mold. The cavity of the mold is adapted to the shape of the blank of the V-shaped forging, and the material entering the mold cavity forms a blank. This process can be understood as using a mold to pick out the blank from the billet. The remaining material after picking out the blank becomes waste, which will lead to serious material waste, thereby increasing the production cost of the enterprise. Moreover, the blank obtained by the above method is limited by the filling rate of the mold cavity, and its shape is quite different from the final forging. Therefore, it is difficult to accurately position the blank in the pre-forging die during pre-forging. Summary of the invention

[0004] The invention provides a blank positioning tool and a blank manufacturing method for V-shaped forgings, which are used to solve the technical problems that the existing method for producing V-shaped forging blanks will cause serious material waste and the shape of the blank is very different from that of the final forging, making it difficult to accurately position it in a pre-forging die.

[0005] The present invention is implemented by the following technical scheme: a blank positioning tool, used for positioning a blank of a V-shaped forging, the blank having a first arm, a second arm and an arc-shaped convex portion, the ends of the first arm and the second arm are connected to form a V-shaped structure with an inner angle greater than 90°, the arc-shaped convex portion is connected to the connection between the first arm and the second arm and is located outside the V-shaped structure, comprising:

[0006] A tire mold, wherein the tire mold is provided with a mold cavity formed by a first straight groove, a second straight groove and an arc groove, wherein one end of the first straight groove is connected with one end of the second straight groove to form a V-shaped groove with an inner angle greater than 90°, the arc groove is arranged on the outside of the V-shaped groove, the other end of the first straight groove forms a first bayonet, and the other end of the second straight groove forms a second bayonet;

[0007] When the blank is loaded into the mold cavity, the first arm is accommodated in the first straight groove and the end of the first arm is clamped in the first bayonet, the second arm is accommodated in the second straight groove and the end of the second arm is clamped in the second bayonet, and the arc-shaped protrusion is clamped in the arc-shaped groove to position the blank in the mold cavity.

[0008] Further, in order to better implement the present invention, the second straight groove is adapted to the second support arm;

[0009] The volume of the first straight groove is greater than that of the first support arm, so that two material distribution gaps are formed between the first support arm and the middle groove wall of the first straight groove, and the two material distribution gaps are respectively located on both sides of the first support arm.

[0010] Further, in order to better implement the present invention, the width of the material dividing gap ΔL=0.1W-0.5W, wherein W is the maximum width of the V-shaped forging;

[0011] The two material distribution gaps are respectively a first gap located inside the V-shaped structure and a second gap located outside the V-shaped structure, and a width of the second gap is greater than a width of the first gap.

[0012] Furthermore, in order to better realize the present invention, when the blank is loaded into the mold cavity, the gap between the outer wall of the end of the first arm and the inner wall of the first bayonet is 2-3mm, the gap between the outer wall of the end of the second arm and the inner wall of the second bayonet is 2-3mm, and the gap between the outer wall of the arc-shaped protrusion and the inner wall of the arc-shaped groove is 2-3mm.

[0013] Furthermore, in order to better implement the present invention, the angle between the central axis of the first straight groove and the central axis of the second straight groove is α, wherein 100°≤α≤110°.

[0014] Furthermore, in order to better implement the present invention, the depth of the mold cavity is Δh=0.3h-0.6h, wherein h is the thickness of the blank.

[0015] Furthermore, in order to better implement the present invention, a jaw is provided on the middle groove wall of the first straight groove, and the jaw is located on the outer side of the V-shaped structure.

[0016] Furthermore, in order to better implement the present invention, the cavity opening of the mold cavity is provided with a mold opening radius, and the draft angle of the tire mold is 10°-15°.

[0017] Furthermore, in order to better realize the present invention, arc transition is adopted at the connection position between the groove wall of the first straight groove and the groove wall of the second straight groove, at the connection position between the groove wall of the first straight groove and the groove wall of the arc-shaped groove, and at the connection position between the groove wall of the second straight groove and the groove wall of the arc-shaped groove.

[0018] The blank manufacturing method of the V-shaped forging provided by the present invention comprises:

[0019] Step 1: The bar is subjected to upsetting, flattening and bending in sequence to obtain a blank;

[0020] Step 2: placing the blank obtained in step 1 into the above-mentioned blank positioning tool, so that the first arm of the blank is accommodated in the first straight groove of the tire mold and the end of the first arm is clamped in the first clamping mouth, so that the second arm of the blank is accommodated in the second straight groove of the tire mold and the end of the second arm is clamped in the second clamping mouth, so that the arc-shaped convex part of the blank is clamped in the arc-shaped groove of the tire mold, so as to position the blank in the mold cavity of the tire mold;

[0021] Step 3: Flatten the blank positioned in the die to obtain a V-shaped forging blank.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The blank positioning tool provided by the present invention is used to position a blank of a V-shaped forging, the blank having a first arm, a second arm and an arc-shaped protrusion, the ends of the first arm and the second arm are connected to form a V-shaped structure with an inner angle greater than 90°, the arc-shaped protrusion is connected to the connection between the first arm and the second arm and is located on the outside of the V-shaped structure, the blank positioning tool comprises a die, the die is provided with a die cavity formed by a first straight groove, a second straight groove and an arc-shaped groove, wherein one end of the first straight groove is connected to one end of the second straight groove to form a V-shaped notch with an inner angle greater than 90°, the arc-shaped groove is arranged on the outside of the V-shaped notch, the other end of the first straight groove constitutes a first snap-in, and the other end of the second straight groove constitutes a second snap-in, when the blank is loaded into the die cavity, the first arm allows The first arm is placed in the first straight groove and the end of the first arm is clamped in the first clamping hole, the second arm is accommodated in the second straight groove and the end of the second arm is clamped in the second clamping hole, and the arc-shaped protrusion is clamped in the arc-shaped groove. In this way, the first clamping hole, the second clamping hole and the arc-shaped groove position and limit the blank in different directions, so that the blank can be stably placed in the mold cavity of the blank positioning tool after being loaded into the tire mold cavity. When the blank is processed into a rough billet by the equipment, the blank will not be displaced, so that the shape of the formed rough billet is closer to a V-shaped forging, and then when the rough billet is placed in the pre-forging mold, it can be more easily placed and positioned at the specified position in the mold, so as to ensure the pre-forging quality of the V-shaped forging, which helps to improve the product qualification rate.

[0024] (2) The blank manufacturing method of the V-shaped forging provided by the present invention utilizes the above-mentioned blank positioning tool to position the blank, and then flattens the blank installed in the cavity of the blank positioning tool to make it a blank of the V-shaped forging. Because the blank is positioned and limited in the cavity of the blank positioning tool, the blank will not move when flattened, and with the help of the cavity shape of the blank positioning tool, the shape of the blank formed by flattening the blank is closer to the V-shaped forging, so that when the blank is placed in the pre-forging mold, it can be placed and positioned at the specified position in the mold more easily, so as to ensure the pre-forging quality of the V-shaped forging, which helps to improve the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of a blank making positioning tool provided in an embodiment of the present invention;

[0027] Figure 2 is a top view schematic diagram of a blank making positioning tool provided in an embodiment of the present invention;

[0028] Figure 3 1 is a schematic diagram of the structure when the blank is installed in the tire mold cavity in the embodiment of the present invention (when β=α);

[0029] Figure 4 is a cross-sectional view of the blank in the embodiment of the present invention when it is installed in the tire mold cavity (β=α);

[0030] Figure 5 1 is a schematic diagram of the structure when the blank is installed in the tire mold cavity in the embodiment of the present invention (β>α);

[0031] Figure 6 yes Figure 5 AA section view in;

[0032] Figure 7 1 is a schematic structural diagram of a blank in an embodiment of the present invention when it is installed in a tire mold cavity (β<α);

[0033] Figure 8 yes Figure 7 BB section view in.

[0034] In the figure:

[0035] 100-blank, 110-first arm, 120-second arm, 130-arc-shaped convex portion, 200-mold, 210-first straight groove, 211-first bayonet, 220-second straight groove, 221-second bayonet, 230-arc-shaped groove, 240-jaw, 300-material dividing gap. DETAILED DESCRIPTION

[0036] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0037] Embodiment 1:

[0038] The blank positioning tool provided by the present invention is used to position the blank 100 of the V-shaped forging so that the blank 100 does not move during the process of flattening to form a blank and the blank 100 is formed into a blank with a shape and size closer to the V-shaped forging. Figure 3 As shown, the blank 100 of the V-shaped forging has a first arm 110, a second arm 120 and an arcuate protrusion 130. The ends of the first arm 110 and the second arm 120 are connected to form a V-shaped structure with an inner angle greater than 90°. The arcuate protrusion 130 is connected to the connection between the first arm 110 and the second arm 120 and is located on the outside of the V-shaped structure.

[0039] The blank positioning tool provided by the present invention is as follows Figure 1 and Figure 2 As shown, the mold 200 includes a mold cavity formed by a first straight groove 210, a second straight groove 220 and an arc groove 230, wherein one end of the first straight groove 210 is connected to one end of the second straight groove 220 to form a V-shaped groove with an inner angle greater than 90°, and the arc groove 230 is arranged outside the V-shaped groove. The other end of the first straight groove 210 forms a first bayonet 211, and the other end of the second straight groove 220 forms a second bayonet 221. When the blank 100 is loaded into the mold cavity, as shown in FIG. Figure 3 and Figure 4 As shown, the first arm 110 is accommodated in the first straight groove 210 and the end of the first arm 110 is snapped into the first snap hole 211, the second arm 120 is accommodated in the second straight groove 220 and the end of the second arm 120 is snapped into the second snap hole 221, and the arc-shaped protrusion 130 is snapped into the arc-shaped groove 230.

[0040] In this way, the first bayonet 211, the second bayonet 221 and the arc groove 230 position and limit the blank 100 in different directions, so that the blank 100 can be stably placed in the cavity after being loaded into the die 200 of the blank positioning tooling. When the blank 100 is processed into a rough billet by the equipment (specifically, the rough billet 100 is flattened to obtain the rough billet), the blank 100 will not be displaced, so that the shape of the formed rough billet is closer to a V-shaped forging, and then when the rough billet is placed in the pre-forging die, it can be more easily placed and positioned to the specified position in the pre-forging die, so as to ensure the pre-forging quality and help improve the product qualification rate.

[0041] Optionally, the second straight groove 220 is adapted to the second arm 120, but the volume of the first straight groove 210 is greater than that of the first arm 110. When the blank 100 is accommodated in the mold cavity of the tire mold 200, two material dividing gaps 300 are formed between the outer wall of the first arm 110 and the middle groove wall of the first straight groove 210, and the two material dividing gaps 300 are respectively located on both sides of the first arm 110. Because when the blank 100 is flattened, the metal flows to both sides to increase the width of the blank 100, usually, when flattened, the amount of metal flowing at the first arm 110 is greater than that of the second arm 120, so the material dividing gaps 300 are set on both sides of the first arm 110, and the flowing metal during flattening can enter the above-mentioned material dividing gaps 300, thereby eliminating the risk of folding of the blank 100 during flattening.

[0042] In this embodiment, the width of the above-mentioned material dividing gap 300 is ΔL=0.1W-0.5W, wherein W is the maximum width of the V-shaped forging, and the two above-mentioned material dividing gaps 300 are defined as a first gap located on the inner side of the above-mentioned V-shaped structure and a second gap located on the outer side of the above-mentioned V-shaped structure, and the width of the above-mentioned second gap is greater than the width of the above-mentioned first gap. For example, the width of the above-mentioned second gap is 0.5W, and the width of the above-mentioned first gap is 0.4W; or, the width of the first gap is 30mm, and the width of the second gap is 40mm. Of course, the width values ​​of the first gap and the second gap need to be determined according to the forging and Deform simulation results.

[0043] Optionally, in this embodiment, when the blank 100 is loaded into the mold cavity, the gap between the outer wall of the end of the first arm 110 and the inner wall of the first bayonet 211 is 2-3mm, the gap between the outer wall of the end of the second arm 120 and the inner wall of the second bayonet 221 is 2-3mm, and the gap between the outer wall of the arc-shaped protrusion 130 and the inner wall of the arc-shaped groove 230 is 2-3mm. For example, the gap between the outer wall of the end of the first arm 110 and the inner wall of the first bayonet 211 is set to 2mm, 2.5mm or 3mm, the gap between the outer wall of the end of the second arm 120 and the inner wall of the second bayonet 221 is set to 2mm, 2.5mm or 3mm, and the gap between the outer wall of the arc-shaped protrusion 130 and the inner wall of the arc-shaped groove 230 is set to 2mm, 2.5mm or 3mm.

[0044] The angle between the center axis of the first arm 110 and the center axis of the second arm 120 of the blank 100 is defined as β, which is actually the internal angle of the V-shaped structure. The angle between the center axis of the first straight groove 210 and the center axis of the second straight groove 220 is defined as α, which is actually the internal angle of the V-shaped notch, wherein 100°≤α≤110°, for example, α=100° or α=105° or α=110°.

[0045] The blank 100 in this embodiment is produced from a bar stock, and the bar stock needs to be upset, flattened and bent in sequence to form the above-mentioned blank 100. During the bending process, due to many factors, the above-mentioned β angles of different blanks 100 are different, but under normal circumstances, it can be guaranteed that 90°≤β≤120°, that is, β and the above-mentioned α may have a certain deviation. By setting the gap between the end outer wall of the first arm 110 and the inner wall of the first bayonet 211 to 2-3mm, the gap between the end outer wall of the second arm 120 and the inner wall of the second bayonet 221 to 2-3mm, and the gap between the outer wall of the arc-shaped protrusion 130 and the inner wall of the arc-shaped groove 230 to 2-3mm, even if the above-mentioned β angle of the blank 100 deviates from the above-mentioned α angle, under the action of gravity and / or the beating force applied when flattening, the metal of the blank 100 can automatically flow into the designated position in the mold cavity to achieve rapid and stable positioning, that is, when the consistency of the blank 100 is not high, accurate positioning can also be achieved, thereby improving the fault tolerance rate and further reducing the probability of scrapping the blank 100. If β<α, such as Figure 7 and Figure 8 As shown, the metal of the blank 100 flows toward the side outside the V-shaped structure; if β>α, as Figure 5 and Figure 6 As shown, the metal of the billet 100 flows toward one side within the V-shaped structure.

[0046] Optionally, in this embodiment, the depth of the mold cavity is Δh=0.3h-0.6h, where h is the thickness of the blank 100 (100). For example, Δh=0.3h or Δh=0.5h or Δh=0.6h.

[0047] In order to facilitate the removal of the blank from the mold cavity, in this embodiment, a jaw 240 is provided on the middle groove wall of the first straight groove 210, and the jaw 240 is located on the outside of the V-shaped structure. In addition, in this embodiment, a die fillet is provided at the cavity of the mold cavity, and the draft angle of the mold 200 is 10°-15°, which is more conducive to removing the blank from the mold cavity. Optionally, the radius of the die fillet is 20mm-80mm, such as 20mm, 50mm, 60mm, 80mm, etc., and the draft angle can be 10°, 12° or 15°.

[0048] In this embodiment, the connecting positions of the groove wall of the first straight groove 210 and the groove wall of the second straight groove 220, the connecting positions of the groove wall of the first straight groove 210 and the groove wall of the arc groove 230, and the connecting positions of the groove wall of the second straight groove 220 and the groove wall of the arc groove 230 all adopt arc transition.

[0049] Embodiment 2:

[0050] This embodiment provides a method for manufacturing a blank of a V-shaped forging, which is used to prepare a blank of a V-shaped forging. The method comprises:

[0051] Step 1: The bar is subjected to upsetting, flattening and bending in sequence to obtain the blank 100. The flattening in this step is the flattening in the process of making the blank 100 from the bar.

[0052] Step 2: Place the blank 100 obtained in step 1 into the above-mentioned blank positioning tool, so that the first arm 110 of the blank 100 is accommodated in the first straight groove 210 of the tire mold 200 and the end of the first arm 110 is clamped in the first bayonet 211, the second arm 120 of the blank 100 is accommodated in the second straight groove 220 of the tire mold 200 and the end of the second arm 120 is clamped in the second bayonet 221, and the arc-shaped protrusion 130 of the blank 100 is clamped in the arc-shaped groove 230 of the tire mold 200, so as to position the blank 100 in the mold cavity of the tire mold 200.

[0053] Step 3: Flatten the blank 100 positioned in the die 200 to obtain a blank of a V-shaped forging. The flattening in this step is the flattening of the blank 100 during the process of preparing the blank.

[0054] Through the above method, since the blank 100 is positioned and limited in the cavity of the blank positioning tool, the blank 100 will not move when flattened, and with the help of the cavity shape of the blank positioning tool, the shape of the blank formed by flattening the blank 100 is closer to the V-shaped forging, so that when the blank is placed in the pre-forging mold, it can be more easily placed and positioned at the designated position in the mold, so as to ensure the pre-forging quality of the V-shaped forging, which helps to improve the product qualification rate.

[0055] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A blank positioning tool, used for positioning a blank (100) of a V-shaped forging, wherein the blank (100) comprises a first arm (110), a second arm (120) and an arc-shaped protrusion (130), wherein the ends of the first arm (110) and the second arm (120) are connected to form a V-shaped structure with an inner angle greater than 90°, and the arc-shaped protrusion (130) is connected to the connection between the first arm (110) and the second arm (120) and is located outside the V-shaped structure, characterized in that: include: A tire mold (200), the tire mold (200) is provided with a mold cavity formed by a first straight groove (210), a second straight groove (220) and an arc-shaped groove (230), wherein one end of the first straight groove (210) is connected to one end of the second straight groove (220) to form a V-shaped groove with an inner angle greater than 90 degrees, the arc-shaped groove (230) is arranged on the outside of the V-shaped groove, the other end of the first straight groove (210) forms a first bayonet (211), and the other end of the second straight groove (220) forms a second bayonet (221); When the blank (100) is loaded into the mold cavity, the first arm (110) is accommodated in the first straight groove (210) and the end of the first arm (110) is clamped in the first bayonet (211), the second arm (120) is accommodated in the second straight groove (220) and the end of the second arm (120) is clamped in the second bayonet (221), and the arc-shaped protrusion (130) is clamped in the arc-shaped groove (230); The second straight groove (220) is adapted to the second support arm (120); The volume of the first straight groove (210) is greater than the volume of the first support arm (110), so as to form two material distribution gaps (300) between the first support arm (110) and the middle groove wall of the first straight groove (210), and the two material distribution gaps (300) are respectively located on both sides of the first support arm (110).

2. The blank positioning tool according to claim 1, characterized in that: The width of the material dividing gap (300) is ΔL=0.1W-0.5W, wherein W is the maximum width of the V-shaped forging; The two material dividing gaps (300) are respectively a first gap located inside the V-shaped structure and a second gap located outside the V-shaped structure, and the width of the second gap is greater than the width of the first gap.

3. The blank positioning tool according to claim 1, characterized in that: When the blank (100) is loaded into the mold cavity, the gap between the outer wall of the end of the first arm (110) and the inner wall of the first bayonet (211) is 2-3 mm, the gap between the outer wall of the end of the second arm (120) and the inner wall of the second bayonet (221) is 2-3 mm, and the gap between the outer wall of the arc-shaped protrusion (130) and the inner wall of the arc-shaped groove (230) is 2-3 mm.

4. The blank positioning tool according to claim 3 is characterized in that: The angle between the central axis of the first straight groove (210) and the central axis of the second straight groove (220) is α, wherein 100°≤α≤110°.

5. The blank positioning tool according to claim 1, characterized in that: The depth of the mold cavity Δh=0.3h-0.6h, wherein h is the thickness of the blank (100).

6. The blank positioning tool according to claim 1, characterized in that: A jaw (240) is provided on the middle groove wall of the first straight groove (210), and the jaw (240) is located outside the V-shaped structure.

7. The blank positioning tool according to claim 6, characterized in that: The cavity opening of the mold cavity is provided with a mold opening radius, and the draft angle of the tire mold is 10°-15°.

8. The blank positioning tool according to claim 1, characterized in that: Arc transitions are used at the positions where the groove wall of the first straight groove (210) and the groove wall of the second straight groove (220), at the positions where the groove wall of the first straight groove (210) and the groove wall of the arc-shaped groove (230), and at the positions where the groove wall of the second straight groove (220) and the groove wall of the arc-shaped groove (230) are connected.

9. A method for manufacturing a blank of a V-shaped forging, characterized in that: include: Step 1: The bar is subjected to upsetting, flattening and bending in sequence to obtain a blank (100); Step 2: placing the blank (100) obtained in step 1 into a blank positioning tool as described in any one of claims 1 to 8, so that the first arm (110) of the blank (100) is accommodated in the first straight groove (210) of the tire mold (200) and the end of the first arm (110) is clamped in the first bayonet (211), so that the second arm (120) of the blank (100) is accommodated in the second straight groove (220) of the tire mold (200) and the end of the second arm (120) is clamped in the second bayonet (221), so that the arc-shaped protrusion (130) of the blank (100) is clamped in the arc-shaped groove (230) of the tire mold (200), so as to position the blank (100) in the mold cavity of the tire mold (200); Step 3: Flatten the blank (100) positioned in the die (200) to obtain a blank of a V-shaped forging.

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