A kind of blank positioning tool and a method for manufacturing a V-shaped forging blank

Abstract

The present application relates to a kind of blank positioning tool and V-shaped forging blank manufacturing method, belong to V-shaped forging technical field.The blank positioning tool is used to position the blank of V-shaped forging, blank has first branch, second branch and arc convex part, first branch and second branch are connected to form V-shaped structure with inner angle greater than 90 °, arc convex part is connected at the junction of first branch and second branch, tooling includes mould, is provided with by first straight slot, second straight slot and arc-shaped slot and is formed cavity, the other end of first straight slot constitutes first clamping port, the other end of second straight slot constitutes second clamping port;When blank is loaded into cavity, first branch is housed in first straight slot and the end of first branch is clamped in first clamping port, second branch is housed in second straight slot and the end of second branch is clamped in second clamping port, arc convex part is clamped in arc-shaped slot, to make blank positioning in cavity.The above method uses the above blank positioning tool to make the blank of V-shaped forging into blank.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of V-shaped forgings, and particularly relates to a blank making tool and a method for manufacturing a rough blank of a V-shaped forging. BACKGROUND

[0002] A V-shaped forging is a non-standard special-shaped product, and the forging process includes blank making, pre-forging and finish forging. The blank making and finish forging are usually completed with the aid of a finish forging die and large-scale forging equipment. However, due to the special shape and lack of a suitable blank positioning tool, the blank making is usually performed by using a die pressing method in the prior art, and the specific method is as follows:

[0003] First, a blank with a large size is obtained, and then the blank is pressed from the middle by using a die with a die cavity, so that the material in the middle of the blank enters the die cavity of the die. The die cavity of the die is matched with the shape of the rough blank of the V-shaped forging, and the material entering the die cavity forms the rough blank. This process can be understood as using the die to cut the rough blank from the blank. The remaining material after cutting the rough blank becomes waste material, which will cause serious material waste, thereby increasing the production cost of the enterprise. Moreover, the shape of the rough blank obtained by the above method is greatly different from that of the finish forging, so it is difficult to accurately position the rough blank in the pre-forging die during pre-forging. SUMMARY

[0004] The present application provides a blank making positioning tool and a method for manufacturing a rough blank of a V-shaped forging, which is used to solve the technical problems that the existing method for producing a rough blank of a V-shaped forging will cause serious material waste and the shape of the rough blank is greatly different from that of the finish forging, thereby being difficult to accurately position in the pre-forging die.

[0005] The present application is implemented by the following technical scheme: a blank making positioning tool for positioning a blank of a V-shaped forging, the blank having a first branch, a second branch and an arc-shaped protrusion, the end portions of the first branch and the second branch are connected to form a V-shaped structure with an inner angle greater than 90°, and the arc-shaped protrusion is connected to the connection position of the first branch and the second branch and located on the outer side of the V-shaped structure, comprising:

[0006] A core 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 with 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 outer side of the V-shaped notch, the other end of the first straight groove forms a first clamping opening, and the other end of the second straight groove forms a second clamping opening.

[0007] When the blank is loaded into the mold cavity, the first branch arm is accommodated in the first straight slot and the end of the first branch arm is clamped in the first clamping hole, the second branch arm is accommodated in the second straight slot and the end of the second branch arm is clamped in the second clamping hole, and the arc-shaped convex part is clamped in the arc-shaped slot, so that the blank is positioned in the mold cavity.

[0008] Further, in order to better realize the present application, the second straight slot is matched with the second branch arm.

[0009] The volume of the first straight slot is greater than the volume of the first branch arm, so as to form two material distribution gaps between the first branch arm and the middle slot wall of the first straight slot, and the two material distribution gaps are respectively located at two sides of the first branch arm.

[0010] Further, in order to better realize the present application, the width of the material distribution gap is 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 the width of the second gap is greater than the width of the first gap.

[0012] Further, in order to better realize the present application, when the blank is loaded into the mold cavity, the gap between the end outer wall of the first branch arm and the inner wall of the first clamping hole is 2-3mm, the gap between the end outer wall of the second branch arm and the inner wall of the second clamping hole is 2-3mm, and the gap between the outer wall of the arc-shaped convex part and the inner wall of the arc-shaped slot is 2-3mm.

[0013] Further, in order to better realize the present application, the included angle between the central axis of the first straight slot and the central axis of the second straight slot is α, wherein 100°≤α≤110°.

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

[0015] Further, in order to better realize the present application, a clamping jaw is arranged on the middle slot wall of the first straight slot, and the clamping jaw is located outside the V-shaped structure.

[0016] Further, in order to better realize the present application, a die opening fillet is arranged on the cavity opening of the mold cavity, and the draft angle of the tire mold is 10°-15°.

[0017] Further, in order to better realize the present application, the position where the groove wall of the first straight groove meets the groove wall of the second straight groove, the position where the groove wall of the first straight groove meets the groove wall of the arc-shaped groove, and the position where the groove wall of the second straight groove meets the groove wall of the arc-shaped groove are all transitioned by a circular arc.

[0018] The present application provides a blank manufacturing method of a V-shaped type forging piece, which comprises the following steps:

[0019] Step 1: a bar is sequentially upset, flattened and bent to obtain a blank;

[0020] Step 2: the blank obtained in step 1 is placed in the blank manufacturing positioning tool, so that the first branch arm of the blank is accommodated in the first straight groove of the die and the end of the first branch arm is clamped in the first clamping opening, so that the second branch arm of the blank is accommodated in the second straight groove of the die and the end of the second branch arm is clamped in the second clamping opening, and so that the arc-shaped convex part of the blank is clamped in the arc-shaped groove of the die, so as to position the blank in the cavity of the die;

[0021] Step 3: the blank positioned in the die is flattened to obtain a blank of a V-shaped type forging piece.

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

[0023] (1) The blank manufacturing positioning tool is used for positioning the blank of a V-shaped type forging piece, the blank has a first branch arm, a second branch arm and an arc-shaped convex part, the ends of the first branch arm and the second branch arm meet to form a V-shaped structure with an inner angle greater than 90°, and the arc-shaped convex part is connected to the meeting position of the first branch arm and the second branch arm and is located on the outside of the V-shaped structure, the blank manufacturing positioning tool comprises a die, the die is provided with a cavity formed by a first straight groove, a second straight groove and an arc-shaped groove, one end of the first straight groove meets one end of the second straight groove to form a V-shaped opening with an inner angle greater than 90°, the arc-shaped groove is arranged on the outside of the V-shaped opening, the other end of the first straight groove forms a first clamping opening, and the other end of the second straight groove forms a second clamping opening, when the blank is loaded into the cavity, the first branch arm is accommodated in the first straight groove and the end of the first branch arm is clamped in the first clamping opening, the second branch arm is accommodated in the second straight groove and the end of the second branch arm is clamped in the second clamping opening, and the arc-shaped convex part is clamped in the arc-shaped groove, so that the first clamping opening, the second clamping opening and the arc-shaped groove position and limit the blank in different directions, so that the blank can be stably placed in the cavity after being loaded into the cavity of the die of the blank manufacturing positioning tool, and the blank will not displace when the blank is processed into a blank by using equipment, so that the shape of the formed blank is closer to the V-shaped type forging piece, and the blank can be more easily placed and positioned to a specified position in the die when being loaded into a preforming die, so as to ensure the preforming quality of the V-shaped type forging piece and help to improve the product qualification rate.

[0024] (2) The rough blank manufacturing method of the V-shaped type forging provided by the application uses the blank manufacturing positioning tool to position the blank, and then flattens the blank in the cavity of the blank manufacturing positioning tool, so that the blank is called the rough blank of the V-shaped type forging. Because the blank is positioned and limited in the cavity of the blank manufacturing positioning tool, the blank will not move when it is flattened. In addition, the shape of the cavity of the blank manufacturing positioning tool makes the rough blank formed by flattening the blank closer to the V-shaped type forging, so that the rough blank can be placed and positioned in the specified position in the die more easily when it is put into the preforming die, thereby ensuring the preforming quality of the V-shaped type forging and helping to improve the product qualification rate. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0026] Figure 1 is a structural schematic view of the blank manufacturing positioning tool provided by the embodiment of the application;

[0027] Figure 2 is a top view of the blank manufacturing positioning tool provided by the embodiment of the application;

[0028] Figure 3 is a structural schematic view of the blank when the blank is placed in the cavity of the die provided by the embodiment of the application (β=α);

[0029] Figure 4 is a sectional view of the blank when the blank is placed in the cavity of the die provided by the embodiment of the application (β=α);

[0030] Figure 5 is a structural schematic view of the blank when the blank is placed in the cavity of the die provided by the embodiment of the application (β>α);

[0031] Figure 6 is a sectional view of A-A in Figure 5 ;

[0032] Figure 7 is a structural schematic view of the blank when the blank is placed in the cavity of the die provided by the embodiment of the application (β<α);

[0033] Figure 8 is a sectional view of B-B in Figure 7 ;

[0034] In the drawings:

[0035] 100-billet, 110-first arm, 120-second arm, 130-arc-shaped protrusion, 200-die, 210-first straight slot, 211-first clamping hole, 220-second straight slot, 221-second clamping hole, 230-arc-shaped slot, 240-jaw. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0037] Embodiment 1

[0038] The billet positioning tool provided by the present application is used for positioning the billet 100 of the V-shaped forging, so that the billet 100 does not move in the process of being flattened to form a rough billet, and the billet 100 is shaped to be closer to the rough billet of the V-shaped forging in shape and size. Figure 3 As shown in the drawings, the above-mentioned billet 100 of the V-shaped forging has a first arm 110, a second arm 120 and an arc-shaped 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°, and the arc-shaped protrusion 130 is connected to the connection position of the first arm 110 and the second arm 120 and is located on the outside of the V-shaped structure.

[0039] The billet positioning tool provided by the present application, as shown in the drawings, comprises a die 200, which is provided with a die cavity formed by a first straight slot 210, a second straight slot 220 and an arc-shaped slot 230. Figure 1 And Figure 2 The other end of the first straight slot 210 forms a first clamping hole 211, and the other end of the second straight slot 220 forms a second clamping hole 221. When the billet 100 is loaded into the die cavity, as shown in the drawings, the first arm 110 is accommodated in the first straight slot 210 and the end of the first arm 110 is clamped in the first clamping hole 211, the second arm 120 is accommodated in the second straight slot 220 and the end of the second arm 120 is clamped in the second clamping hole 221, and the arc-shaped protrusion 130 is clamped in the arc-shaped slot 230. Figure 3 And Figure 4

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

[0041] Optionally, the second straight slot 220 is adapted to the second arm 120, but the volume of the first straight slot 210 is greater than the volume of the first arm 110, and when the blank 100 is accommodated in the cavity of the die 200, two blank separation gaps are formed between the outer wall of the first arm 110 and the middle slot wall of the first straight slot 210, and the two blank separation gaps are respectively located on the two sides of the first arm 110. Because the metal flows to both sides when the blank 100 is flattened, the width of the blank 100 increases, and generally, the amount of metal flowing at the first arm 110 is greater than that at the second arm 120 when the blank is flattened, so the blank separation gaps are arranged on both sides of the first arm 110, and the metal flowing when the blank is flattened can enter the blank separation gaps, thereby eliminating the risk of folding of the blank 100 when the blank is flattened.

[0042] In the embodiment, the width ΔL of the blank separation gap is 0.1W-0.5W, where W is the maximum width of the V-shaped forging, and the two blank separation gaps are respectively defined as 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. For example, the width of the second gap is 0.5W, and the width of the 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 the 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 2-3 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 arcuate protrusion 130 and the inner wall of the arcuate groove 230 is 2-3 mm. 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 2 mm, 2.5 mm, or 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 set to 2 mm, 2.5 mm, or 3 mm, and the gap between the outer wall of the arcuate protrusion 130 and the inner wall of the arcuate groove 230 is set to 2 mm, 2.5 mm, or 3 mm.

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

[0045] The blank 100 in this embodiment is produced from a bar stock, which needs to be sequentially upset, flattened, and bent to form the above-mentioned blank 100. During the bending process, due to many factors, the above-mentioned β angle of different blanks 100 is different. However, under normal circumstances, it can be guaranteed that 90°≤β≤120°, that is, there may be a certain deviation between β and the above-mentioned α. By setting the gap between the outer wall of the end of the first arm 110 and the inner wall of the first bayonet 211 to 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 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 there is a deviation between the above-mentioned β angle and the above-mentioned α angle of the blank 100, 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, 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 the embodiment, the depth of the 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] To facilitate the removal of the finished blank from the cavity, in the embodiment, a jaw 240 is arranged on the middle wall of the first straight groove 210, which is located outside the V-shaped structure. In addition, in the embodiment, a round corner is arranged at the opening of the cavity, and the draft angle of the die 200 is 10°-15°, which is more conducive to the removal of the finished blank from the cavity. Optionally, the radius of the round corner is 20mm-80mm, for example, 20mm, 50mm, 60mm, 80mm, etc., and the draft angle can be 10°, 12°, or 15°.

[0048] In the embodiment, the junctions of the walls of the first straight groove 210 and the walls of the second straight groove 220, the junctions of the walls of the first straight groove 210 and the walls of the arc-shaped groove 230, and the junctions of the walls of the second straight groove 220 and the walls of the arc-shaped groove 230 all adopt a circular arc transition.

[0049] Embodiment 2:

[0050] The embodiment provides a method for manufacturing a V-shaped blank, which is used for manufacturing a V-shaped blank, and the method comprises the following steps:

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

[0052] Step 2: The blank 100 obtained in step 1 is placed in the blank manufacturing positioning tool, so that the first branch arm 110 of the blank 100 is accommodated in the first straight groove 210 of the die 200 and the end of the first branch arm 110 is clamped in the first jaw 211, so that the second branch arm 120 of the blank 100 is accommodated in the second straight groove 220 of the die 200 and the end of the second branch arm 120 is clamped in the second jaw 221, and so that the arc-shaped convex part 130 of the blank 100 is clamped in the arc-shaped groove 230 of the die 200, so as to position the blank 100 in the cavity of the die 200.

[0053] Step 3: The blank 100 positioned in the die 200 is flattened to obtain a V-shaped blank. The flattening in this step is the flattening in the process of manufacturing the blank 100 into a V-shaped blank.

[0054] Through the above method, because the blank 100 is positioned and limited in the cavity of the blank positioning tooling, when flattening, the blank 100 will not move, and by means of the cavity shape of the blank positioning tooling, the shape of the rough blank formed by flattening the blank 100 is closer to the V-shaped forging, and then the rough blank can be more easily placed and positioned to the specified position in the die when put into the pre-forging die, so as to ensure the pre-forging quality of the V-shaped forging, and help to improve the product qualification rate.

[0055] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A blank positioning tool for positioning a blank (100) of a V-shaped forging to obtain a blank of the V-shaped forging, wherein the blank (100) has a first arm (110), a second arm (120) and an arcuate 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 arcuate protrusion (130) is connected to the junction of 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) is provided with a mold cavity formed by a first straight groove (210), a second straight groove (220), and an arcuate 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 notch with an inner angle greater than 90°, the arcuate groove (230) is provided on the outside of the V-shaped notch, 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 between the first support arm (110) and the middle groove wall of the first straight groove (210), and the two material distribution gaps 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 ΔL=0.1W-0.5W, wherein W is the maximum width of the V-shaped forging; 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 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, characterized in that: The included 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 adopted at 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-shaped groove (230), and the connecting positions of the groove wall of the second straight groove (220) and the groove wall of the arc-shaped groove (230).

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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