Integrated hinge plate stamping structure and stamping process thereof

Abstract

The invention relates to the technical field of hinge stamping machining, and provides an integrated hinge plate stamping structure and a stamping process thereof. The integrated hinge plate stamping structure comprises an upper die plate assembly and a lower die plate assembly which are used for stamping and forming a hinge plate, and a plurality of punches and a plurality of deep drawing concave parts which are used for stamping and forming a hinge shaft, the punches are arranged on the upper die plate assembly at intervals, and the deep drawing concave parts are arranged on the lower die plate assembly at intervals. A plurality of punches and a plurality of deep drawing concave parts are arranged in a one-to-one correspondence mode, a blank is conveyed between the upper die plate assembly and the lower die plate assembly in a stepping mode under the action of the conveying mechanism, and the blank passes through the punches and the deep drawing concave parts, and the upper die plate assembly and the lower die plate assembly in the die opening and closing process. The hinge plate is formed by stamping the blank, and the hinge shaft is formed by stamping step by step.

Description

Technical Field

[0001] The invention relates to the technical field of hinge stamping processing, and in particular to an integrated hinge plate stamping structure and a stamping process thereof. Background Art

[0002] The refrigerator hinge is generally a step-shaped structure, and a hinge shaft is provided on the refrigerator hinge. The hinge shaft and the refrigerator hinge are difficult to be processed and formed in one step. The existing process is to process the hinge shaft first, and then fix the hinge shaft to the refrigerator hinge plate by welding. The process steps are cumbersome. Summary of the invention

[0003] The present invention proposes an integrated hinge plate stamping structure and a stamping process thereof, wherein a plurality of punches and a plurality of drawing recesses are provided between the upper and lower template components, and the plurality of punches and the plurality of drawing recesses are arranged in a one-to-one correspondence, so that the hinge plate is stamped on the blank and the hinge shaft is gradually processed and formed at the same time, so that the hinge plate and the hinge shaft are set as a whole through stamping and drawing, thereby eliminating the existing processing method of welding the hinge shaft to the hinge plate.

[0004] An integrated hinge plate stamping structure designed for this purpose includes an upper template assembly and a lower template assembly for stamping and forming the hinge plate, and a plurality of punches and a plurality of drawing recesses for stamping and forming the hinge shaft. The plurality of punches are arranged at intervals on the upper template assembly, and the plurality of drawing recesses are arranged at intervals on the lower template assembly. The plurality of punches and the plurality of drawing recesses are arranged in a one-to-one correspondence. The blank is conveyed step by step between the upper template assembly and the lower template assembly under the action of a conveying mechanism, and passes through the plurality of punches and the plurality of drawing recesses. During the opening and closing process of the upper template assembly and the lower template assembly, the blank is stamped to form the hinge plate and the hinge shaft is stamped step by step at the same time.

[0005] The plurality of punches and the plurality of drawing recesses are divided into a hinge shaft pre-stamping forming station and a hinge shaft final drawing forming station, and a plurality of hinge shaft transition drawing and shaping stations are arranged between the hinge shaft pre-stamping forming station and the hinge shaft final drawing forming station to realize the gradual stamping and drawing processing of the hinge shaft.

[0006] The plurality of punches are each provided with a punching end portion acting on the blank, and a diameter D2 of the punching end portion of a rear punch is smaller than a diameter D1 of the punching end portion of a front punch.

[0007] The punch comprises a pre-stamping punch, and the deep-drawing concave part comprises a first pre-drawing concave part. The pre-stamping punch and the first pre-drawing concave part are matched in the upper and lower template assemblies and pre-stamped on the blank to form a groove position.

[0008] The punch comprises a pre-punching and drawing punch, and the drawing concave part comprises a second pre-drawing concave part. The pre-punching and drawing punch and the second pre-drawing concave part are matched in the upper and lower template assemblies and further drawn into a first shaping concave at the concave position of the blank; The punch comprises a first transition drawing punch, and the drawing recess comprises a third pre-drawing recess. The first transition drawing punch and the third pre-drawing recess cooperate with each other in the upper and lower template assemblies and further draw the first shaping recess of the blank into a second shaping recess.

[0009] The punch includes a second transition drawing punch, the drawing recess includes a first shaping drawing recess, the second transition drawing punch is provided with a shaping taper, the second transition drawing punch and the first shaping drawing recess are matched in the upper and lower template assemblies and further draw the first shaping groove of the blank into a third shaping groove.

[0010] The punch includes a third transition drawing punch, the drawing recess includes a second shaping drawing recess, the third transition drawing punch is provided with a first step shaping portion, the third transition drawing punch and the second shaping drawing recess are in a mold-matching state with the upper and lower template assemblies and further draw the third shaping groove of the blank into a fourth shaping groove.

[0011] The punch includes a fourth transition drawing punch, the drawing recess includes a third shaping drawing recess, the fourth transition drawing punch is provided with a second step shaping portion, the fourth transition drawing punch and the third shaping drawing recess are in a mold-matching state of the upper and lower template assemblies and further draw the fourth shaping groove of the blank into a fifth shaping groove.

[0012] The punch includes a final drawing punch, the drawing recess includes a final drawing recess, the final drawing punch is provided with a third step shaping portion, the final drawing punch and the final drawing recess are in a mold-matching state of the upper and lower template assemblies and further drawn into a finalized deep groove in the fifth shaping groove of the blank to form a hinge axis on the outer surface of the blank.

[0013] A stamping process for an integrated hinge plate stamping structure includes the following steps: step 1: placing a blank on a conveying mechanism, and the conveying mechanism conveys the blank to a stamping station between an upper template assembly and a lower template assembly in a stepwise manner; Step 2: The blank is gradually stamped at a stamping station between the upper template assembly and the lower template assembly to form a hinge plate, wherein the blank is sequentially and stepwise passed through a plurality of punches and a plurality of drawing recesses correspondingly arranged between the upper and lower template assemblies, so that the hinge plate is stamped and formed between the upper template assembly and the lower template assembly, and the hinge shaft is gradually stamped and formed; Step 3: After the blank is processed, it is transported to the blanking station between the upper and lower template components. The blanking punch acts on the outer periphery of the hinge plate after the blank is formed to punch the hinge plate out of the mold.

[0014] The beneficial technical effects of the present invention are as follows: By arranging a plurality of punches and a plurality of drawing recesses between the upper and lower template components, and the plurality of punches and the plurality of drawing recesses are arranged one by one, the hinge plate is punched on the blank and the hinge shaft is gradually processed and formed at the same time, so that the hinge plate and the hinge shaft are set as a whole through stamping and drawing, and the existing processing method of welding and fixing the hinge shaft to the hinge plate is eliminated, thereby simplifying the processing technology of setting the hinge plate and the hinge shaft as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a schematic diagram of the planar structure of a hinge plate according to an embodiment of the present invention.

[0017] Figure 2 The figure is a schematic diagram of the three-dimensional structure of a hinge plate according to an embodiment of the present invention.

[0018] Figure 3 The figure is a schematic diagram of the planar structure of several punches and a deep-drawn concave part according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0020] See also Figure 1-Figure 3 An integrated hinge plate stamping structure includes an upper template assembly and a lower template assembly for stamping a hinge plate 1, and a plurality of punches 3 and a plurality of drawing recesses 4 for stamping a hinge shaft 2. The plurality of punches 3 are arranged at intervals on the upper template assembly, and the plurality of drawing recesses 4 are arranged at intervals on the lower template assembly. The plurality of punches 3 and the plurality of drawing recesses 4 are arranged in a one-to-one correspondence. The blank is conveyed step by step between the upper template assembly and the lower template assembly under the action of a conveying mechanism, and passes through the plurality of punches 3 and the plurality of drawing recesses 4. During the opening and closing process of the upper template assembly and the lower template assembly, the blank is stamped to form the hinge plate 1 while the hinge shaft 2 is stamped step by step to avoid the situation where the hinge shaft 2 is easily broken in one-step processing.

[0021] By providing a plurality of punches 3 and a plurality of drawing recesses 4 between the upper and lower template components, and the plurality of punches 3 and the plurality of drawing recesses 4 are arranged one by one, the hinge plate 1 is punched on the blank, and the hinge shaft 2 is gradually processed and formed at the same time, so that the hinge plate 1 and the hinge shaft 2 are set as a whole through stamping and drawing, and the existing processing method of welding and fixing the hinge shaft 2 on the hinge plate 1 is eliminated, and the processing technology of setting the hinge plate 1 and the hinge shaft 2 as a whole is simplified.

[0022] In this embodiment, a plurality of punches 3 are fixed on the upper template assembly through an insert structure, and the upper template assembly includes an upper template with a plurality of insert slots, and each punch 3 is assembled on the insert slot of the corresponding upper template. Each punch 3 is fixedly connected to the upper template by a screw.

[0023] In this embodiment, the lower template assembly includes a lower template that cooperates with the upper template, and the lower template is provided with a plurality of mounting grooves for mounting a plurality of deep drawing concave parts 4, and each deep drawing concave part 4 is fixed to the corresponding mounting groove by screws. A guide column and a guide sleeve hole for guiding the opening and closing of the mold are provided between the upper template and the lower template.

[0024] The plurality of punches 3 and the plurality of drawing recesses 4 are divided into a hinge shaft pre-stamping forming station and a hinge shaft final drawing forming station, and a plurality of hinge shaft transition drawing and shaping stations are arranged between the hinge shaft pre-stamping forming station and the hinge shaft final drawing forming station to realize the gradual stamping and drawing processing of the hinge shaft 2.

[0025] It is formed through 7 consecutive stamping processes, and has special requirements on the stamping stretching depth R to avoid stamping fracture during the stamping process.

[0026] The plurality of punches 3 are each provided with a punching end portion acting on the blank, and a diameter D2 of the punching end portion of a rear punch 3 is smaller than a diameter D1 of the punching end portion of a front punch 3 .

[0027] The punch 3 comprises a pre-punching punch 3.1, and the deep-drawn recess 4 comprises a first pre-drawn recess 4.1. The pre-punching punch 3.1 and the first pre-drawn recess 4.1 are matched in the upper and lower template assemblies and pre-punched on the blank to form a groove position 5.

[0028] In this embodiment, the pre-punching punch 3.1 is provided with a first punching depth R1, which is 2 mm to 3 mm, preferably 3 mm. The punching end diameter of the pre-punching punch 3.1 is D1, which is 9 mm to 9.05 mm, preferably 9.03 mm.

[0029] The punch 3 includes a pre-punching and drawing punch 3.2, and the drawing recess 4 includes a second pre-drawing recess 4.2. The pre-punching and drawing punch 3.2 and the second pre-drawing recess 4.2 are matched in the upper and lower mold assemblies and further drawn on the groove position 5 of the blank into a first shaping groove 6; In this embodiment, the stamping end diameter of the pre-stamping and drawing punch 3.2 is D2, D2 is 6mm to 6.2mm, preferably 6.2mm; the pre-stamping and drawing punch 3.2 is provided with a second stamping and drawing depth R2, the second stamping and drawing depth R2 is 1mm to 2mm, preferably 2mm.

[0030] The punch 3 comprises a first transition drawing punch 3.3, and the drawing recess 4 comprises a third pre-drawing recess 4.3. The first transition drawing punch 3.3 and the third pre-drawing recess 4.3 are matched in the upper and lower template assemblies and further drawn into a second shaping recess 7 on the first shaping recess 6 of the blank.

[0031] In this embodiment, the punching end diameter of the first transition drawing punch 3.3 is D3, and D3 is 3 mm to 4.5 mm, preferably 4.2 mm, so as to gradually narrow and draw the first shaping groove 6, so that the first shaping groove 6 forms the second shaping groove 7. The first transition drawing punch 3.3 is provided with a third punching and stretching depth R3, and the third punching and stretching depth R3 is 1 mm to 1.5 mm, preferably 1.5 mm.

[0032] The punch 3 includes a second transition drawing punch 3.4, and the drawing recess 4 includes a first shaping drawing recess 4.4. The second transition drawing punch 3.4 is provided with a shaping taper 9. The second transition drawing punch 3.4 and the first shaping drawing recess 4.4 are matched in the upper and lower template assemblies and further draw the first shaping groove 6 of the blank into a third shaping groove 8.

[0033] In this embodiment, the stamping end diameter of the second transition drawing punch 3.4 is D4, D4 is 2.8mm to 3mm, preferably 2.8mm, and the second transition drawing punch 3.4 is provided with a fourth stamping and stretching depth R4, R4 is 0.5mm-1mm, preferably 1mm.

[0034] In this embodiment, the intersection angle A of the two ends of the shaping taper 9 is an acute angle, and a circular arc transition portion 16 is provided between the shaping taper 9 and the punching end of the second transition drawing punch 3.4, and the fillet radius R of the circular arc transition portion 16 is 2.8mm to 3mm. By providing the circular arc transition portion 16, when the second transition drawing punch 3.4 cooperates with the first shaping drawing concave part 4.4, the circular arc transition portion 16 further punches the upper two ends of the second shaping groove 7, squeezes the material, and narrows the two sides of the second shaping groove 7 into the third shaping groove 8.

[0035] The punch 3 includes a third transition drawing punch 3.5, and the drawing recess 4 includes a second shaping drawing recess 4.5. The third transition drawing punch 3.5 is provided with a first step shaping portion 10. The third transition drawing punch 3.5 and the second shaping drawing recess 4.5 are in a mold-matching state of the upper and lower template assemblies and are further drawn into a fourth shaping groove 11 on the third shaping groove 8 of the blank.

[0036] In this embodiment, the stamping end diameter of the third transition drawing punch 3.5 is D5, D5 is 1.8mm to 2.1mm, preferably 2.05mm, and the third transition drawing punch 3.5 is provided with a fifth stamping and stretching depth R5, R5 is 0.5mm to 1mm, preferably 0.8mm.

[0037] In this embodiment, the first step shaping portion 10 has a plurality of rounded transition positions to form a drawing buffer before the last drawing of the hinge plate 1 to avoid the occurrence of spikes on the hinge plate 1 after one step of drawing.

[0038] The punch 3 includes a fourth transition drawing punch 3.6, the drawing recess 4 includes a third shaping drawing recess 4.6, the fourth transition drawing punch 3.6 is provided with a second step shaping portion 12, the fourth transition drawing punch 3.6 and the third shaping drawing recess 4.6 are in a mold-matching state of the upper and lower template assemblies and further draw the fourth shaping groove 11 of the blank into a fifth shaping groove 13.

[0039] In this embodiment, the diameter of the stamping end of the fourth transition drawing punch 3.6 is D6, D6 is 1.5mm to 2.05mm, preferably 2.02mm; the fourth transition drawing punch 3.6 is provided with a sixth stamping and stretching depth R6, R6 is 0.3 to 0.8mm, preferably 0.6mm. Similarly, the second step shaping portion 12 has a plurality of rounded transition positions to form a drawing buffer before the last drawing of the hinge plate 1, so as to avoid the phenomenon of spikes on the hinge plate 1 after one step of drawing.

[0040] The punch 3 includes a final drawing punch 3.7, and the drawing recess 4 includes a final drawing recess 4.7. The final drawing punch 3.7 is provided with a third step shaping portion 14. The final drawing punch 3.7 and the final drawing recess 4.7 are in a mold-matching state of the upper and lower template assemblies and further draw the fifth shaping groove 13 of the blank into a fixed deep groove 15 to form a hinge shaft 2 on the outer surface of the blank.

[0041] In this embodiment, the stamping end diameter of the final drawing punch 3.7 is D7, D7 is 1.8 mm to 2 mm, preferably 1.96 mm, and the final drawing punch 3.7 is provided with a seventh stamping depth R7, and the seventh stamping depth R7 is 0.3 mm.

[0042] In this embodiment, the third step shaping portion 14 acts on the fifth shaping groove 13, and the third step shaping portion 14 is provided with a flat portion. The flat portion of the third step shaping portion 14 and the stamping end of the final drawing punch 3.7 are connected by a rounded corner transition to punch out a flat groove at a position corresponding to the hinge axis 2 on the hinge plate 1. In addition, the rounded corner transition is beneficial to the extrusion of the blank by the punch, so that the blank flows smoothly along the rounded corner transition.

[0043] A stamping process for an integrated hinge plate stamping structure includes the following steps: step 1: placing a blank on a conveying mechanism, and the conveying mechanism conveys the blank to a stamping station between an upper template assembly and a lower template assembly in a stepwise manner; Step 2: The blank is gradually punched at a punching station between the upper template assembly and the lower template assembly to form a hinge plate 1, wherein the blank passes through a plurality of punches 3 and a plurality of drawing recesses 4 arranged one by one between the upper and lower template assemblies in a step-by-step manner, so that the hinge plate 1 is punched and formed between the upper template assembly and the lower template assembly, and the hinge shaft 2 is gradually punched and formed; Step 3: After the blank is processed, it is transported to the blanking station between the upper and lower template components, and the blanking punch acts on the outer periphery of the hinge plate 1 after the blank is formed to punch the hinge plate 1 out of the mold.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated hinge plate stamping structure, characterized in that: The invention comprises an upper template assembly and a lower template assembly for punching and forming a hinge plate (1), and a plurality of punches (3) and a plurality of deep drawing recesses (4) for punching and forming a hinge shaft (2). The plurality of punches (3) are arranged at intervals on the upper template assembly, and the plurality of deep drawing recesses (4) are arranged at intervals on the lower template assembly. The plurality of punches (3) and the plurality of deep drawing recesses (4) are arranged in a one-to-one correspondence. Under the action of a conveying mechanism, the blank is conveyed stepwise between the upper template assembly and the lower template assembly, and passes through the plurality of punches (3) and the plurality of deep drawing recesses (4). During the process of opening and closing the upper template assembly and the lower template assembly, the blank is punched and formed into the hinge plate (1) and the hinge shaft (2) is punched and formed step by step.

2. The integrated hinge plate stamping structure according to claim 1, characterized in that: The plurality of punches (3) and the plurality of deep drawing recesses (4) are divided into a hinge shaft pre-stamping and forming station and a hinge shaft final deep drawing and forming station, and a plurality of hinge shaft transition deep drawing and shaping stations are arranged between the hinge shaft pre-stamping and forming station and the hinge shaft final deep drawing and forming station to achieve the step-by-step stamping and deep drawing processing of the hinge shaft (2).

3. The integrated hinge plate stamping structure according to claim 1, characterized in that: The plurality of punches (3) are each provided with a punching end portion acting on the blank, and a diameter D2 of the punching end portion of a rear punch (3) is smaller than a diameter D1 of the punching end portion of a front punch (3).

4. The integrated hinge plate stamping structure according to claim 1, characterized in that: The punch (3) comprises a pre-punching punch (3.1), the deep-drawn recess (4) comprises a first pre-drawn recess (4.1), the pre-punching punch (3.1) and the first pre-drawn recess (4.1) are matched in the upper and lower mold components and pre-punched on the blank to form a groove position (5).

5. The integrated hinge plate stamping structure according to claim 4, characterized in that: The punch (3) comprises a pre-punching and drawing punch (3.2), the drawing recess (4) comprises a second pre-drawing recess (4.2), the pre-punching and drawing punch (3.2) and the second pre-drawing recess (4.2) are matched in the upper and lower mold assemblies and further drawn on the groove position (5) of the blank into a first shaping groove (6); The punch (3) comprises a first transition drawing punch (3.3), the drawing recess (4) comprises a third pre-drawing recess (4.3), the first transition drawing punch (3.3) and the third pre-drawing recess (4.3) are matched in the upper and lower mold assemblies and further drawn on the first shaping recess (6) of the blank into a second shaping recess (7).

6. The integrated hinge plate stamping structure according to claim 5, characterized in that: The punch (3) comprises a second transition drawing punch (3.4), the drawing recess (4) comprises a first shaping drawing recess (4.4), the second transition drawing punch (3.4) is provided with a shaping taper (9), the second transition drawing punch (3.4) and the first shaping drawing recess (4.4) are matched in the upper and lower mold assembly and further drawn into a third shaping recess (8) on the first shaping recess (6) of the blank.

7. The integrated hinge plate stamping structure according to claim 6, characterized in that: The punch (3) comprises a third transition drawing punch (3.5), the drawing recess (4) comprises a second shaping drawing recess (4.5), the third transition drawing punch (3.5) is provided with a first step shaping portion (10), the third transition drawing punch (3.5) and the second shaping drawing recess (4.5) are in a mold-matching state with the upper and lower mold plate assemblies and are further drawn on the third shaping recess (8) of the blank to form a fourth shaping recess (11).

8. The integrated hinge plate stamping structure according to claim 7, characterized in that: The punch (3) comprises a fourth transition drawing punch (3.6), the drawing recess (4) comprises a third shaping drawing recess (4.6), the fourth transition drawing punch (3.6) is provided with a second step shaping portion (12), the fourth transition drawing punch (3.6) and the third shaping drawing recess (4.6) are in a mold-matching state with the upper and lower mold plate assemblies and are further drawn on the fourth shaping recess (11) of the blank to form a fifth shaping recess (13).

9. The integrated hinge plate stamping structure according to claim 8, characterized in that: The punch (3) comprises a final drawing punch (3.7), the drawing recess (4) comprises a final drawing recess (4.7), a third step shaping portion (14) is provided on the final drawing punch (3.7), the final drawing punch (3.7) and the final drawing recess (4.7) are in a mold-matching state of the upper and lower template assemblies and further drawn into a finalized deep groove (15) at the fifth shaping groove (13) of the blank, so as to form a hinge shaft (2) on the outer surface of the blank.

10. A stamping process for an integrated hinge plate stamping structure, characterized in that: The steps include: step 1: placing the blank on a conveying mechanism, and the conveying mechanism conveys the blank to a stamping station between an upper template assembly and a lower template assembly in a stepwise manner; Step 2: The blank is gradually punched at a punching station between the upper template assembly and the lower template assembly to form a hinge plate (1), wherein the blank passes through a plurality of punches (3) and a plurality of drawing recesses (4) arranged one by one between the upper and lower template assemblies in a step-by-step manner, so that the hinge plate (1) is punched and formed between the upper template assembly and the lower template assembly, and the hinge shaft (2) is gradually punched and formed; Step 3: After the blank is processed, it is transported to the blanking station between the upper and lower template components, and the blanking punch acts on the outer periphery of the hinge plate (1) after the blank is formed, so as to punch the hinge plate (1) out of the mold.

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