Pressing ring integrated top cover sheet forming device and forming process thereof

Abstract

The top cover piece forming device comprises an upper die base, a lower die plate and a material belt, the upper die base comprises an upper die plate and a stop plate, the lower die base comprises a lower die plate, a gap is formed between the lower die plate and the stop plate, the material belt is arranged in the gap, a center hole is punched in the material belt, a hole flanging stamping assembly is arranged on the lower die plate, and the hole flanging stamping assembly is arranged on the lower die plate. The hole flanging stamping assembly comprises a first hole flanging punch and a second hole flanging punch, the backstop plate is provided with a back-upsetting stamping assembly, the back-upsetting stamping assembly comprises a first back punch and a second back punch, the gap is reduced during die assembly, a material belt abuts against the upper end face of the lower die plate and the lower end face of the backstop plate, and the hole flanging stamping assembly punches out in the direction of the backstop plate. Forming a flanged hole in the material belt; the upper die plate drives the stop plate to press downwards, the upsetting and punching assembly punches out towards the lower die plate, the first back-punching head and the second back-punching head conduct upsetting on the flanged hole in sequence, the flanged hole is further machined in the material belt, and the top cover piece and the welding pressing ring are integrally formed.

Description

Technical Field

[0001] The invention relates to the technical field of top cover sheet molding, and in particular to a top cover sheet molding device with an integrated pressure ring and a molding process thereof. Background Art

[0002] On conventional top cover products, only the pole slot is a welded pressure ring split structure, and subsequent processes require welding to connect the top cover and the welding pressure ring. Additional welding processes are required during processing, which increases the production cost during processing; and in the conventional process, a single high-speed stamping method is often used when turning the hole in the manufacturing process, which will cause the hole to tear and cause the material strip to be scrapped, and only a single return is used when returning the pier, which will cause the root to be concave or the turning angle to be too large, requiring subsequent additional processing and correction, increasing the workload of the operator. Summary of the invention

[0003] In view of the shortcomings and defects of the prior art, a top cover sheet forming device and a forming process thereof are provided. To achieve the purpose of integrally forming the top cover sheet and the welding pressure ring, the present invention provides the following technical solutions.

[0004] The top cover sheet forming device with an integrated pressure ring comprises an upper die base, a lower die plate and a material strip, the upper die base comprises an upper die plate and a stop plate, the lower die base comprises a lower die plate, a gap is arranged between the lower die plate and the stop plate, the material strip is arranged in the gap, and a center hole is punched out of the material strip, a hole punching assembly is arranged on the lower die plate, the hole punching assembly comprises a first hole punch and a second hole punch which are arranged in sequence, a return punching assembly is arranged on the stop plate, the return punching assembly comprises a first return punch and a second return punch, the gap is reduced when the die is closed, the material strip is respectively abutted against the upper end surface of the lower die plate and the lower end surface of the stop plate, the hole punching assembly punches out toward the stop plate to form a hole on the material strip; the upper die plate drives the stop plate to press down, and the return punching assembly punches out toward the lower die plate, the first return punch and the second return punch return the hole in sequence, and the hole is further processed on the material strip.

[0005] Compared with the prior art, the present application arranges a hole punching assembly on the stop plate, and the first hole punch and the second hole punch of the hole punching assembly respectively punch the material strip, and realizes the hole forming in two steps, which can prevent the hole from being torn and causing the material strip to be scrapped. At the same time, the first return punch and the second return punch of the return punching assembly return the hole in turn. Through the two-step return, the wall thickness of the hole is increased, which is convenient for the subsequent forming and extrusion operations.

[0006] Furthermore, the punching assembly also includes a third punching punch, and the stop plate is provided with a first matching groove, a second matching groove and a third matching groove. When the mold is closed, the end of the first punching punch is matched and arranged in the first matching groove, the end of the second punching punch is matched and arranged in the second matching groove, and the end of the third punching punch is matched and arranged in the third matching groove. When the third punching punch is punching, the side wall of the punched hole is straightened.

[0007] Through the above improvements, the hole punching assembly includes a third hole punch, and the stop plate is provided with a first matching groove, a second matching groove and a third matching groove. When the mold is closed, the end of the first hole punch is matched and arranged in the first matching groove, and the end of the second hole punch is matched and arranged in the second matching groove, which is convenient for the forming of the hole; the end of the third hole punch is matched and arranged in the third matching groove, and the side wall of the hole is straightened to facilitate the subsequent back-piercing, and at the same time, the bending angle of the hole can also be reduced to prevent the generation of interlayer in subsequent operations, which affects the final forming of the product.

[0008] Furthermore, a shaping punch is provided on the lower template. When the mold is closed, the shaping punch punches out through the turned hole toward the stop plate, and the outer wall of the shaping punch abuts against the inner wall of the turned hole. The first return punch punches out toward the lower template to perform back-piercing shaping on the turned hole.

[0009] Through the above improvements, a shaping punch is provided on the lower template. When the first return punch is performed, the shaping punch punches out toward the stop plate through the hole, and the outer wall of the shaping punch abuts against the inner wall of the hole. At this time, the first return punch punches out toward the lower template, which can further reduce the bending angle of the hole and increase the wall thickness of the side wall of the hole, which is convenient for subsequent forming.

[0010] Furthermore, the return pier punching assembly also includes a forming punch, and when the mold is closed, the forming punch punches out toward the lower mold plate, and presses the hole downward to achieve final forming.

[0011] Through the above improvements, the return pier punching assembly also includes a forming punch, and the punching of the forming punch is used for the final forming of the product.

[0012] The present application also relates to a molding process for a top cover sheet with an integrated pressure ring, and the molding process specifically comprises the following steps: Step 1, trimming and punching: Feed the material strip into the stamping equipment, and perform trimming and punching on the material strip while the material strip is being fed forward, and trimming holes and center holes are formed on the material strip in sequence; Step 2, forming and punching holes: in the process of feeding the material strip forward, the center hole is punched out toward the stop plate by a two-stage progressive punching method using the first punching punch and the second punching punch, and the punched hole is straightened by the third punching punch to provide forming material for the welding ring part protruding above the top cover product; Step 3, back-pier shaping: During the forward feeding of the material strip, the material is squeezed down through the two-stage back-pier to facilitate the subsequent molding and extrusion. The pole and welding pressure ring are formed on the material strip by the pier pressing method; Step 4, blanking: During the forward feeding of the material belt, the product shape is cut out on the material belt and blanking is performed to obtain the final product; Step 5, waste removal: During the forward feeding of the material belt, waste is obtained on the material belt after the product is blanked, and the waste is removed.

[0013] Furthermore, in step 2, the specific steps of punching the hole include: Step 21, first punching: During the process of feeding the material strip forward, the center hole on the material strip is punched for the first time by the first punching punch on the lower die base; Step 22, second hole punching: During the process of the material strip being fed forward, the second hole punching is performed by the second hole punch on the lower die base; Step 23, straightening the punched holes: During the forward feeding of the material strip, the third punched hole punch on the lower die base is used to punch upward to straighten the formed punched holes.

[0014] Through the above improvements, the first punch and the second punch of the punch assembly punch the material strip respectively, and the punching forming is divided into two steps, which can prevent the punching from tearing and causing the material strip to be scrapped.

[0015] Furthermore, in step 21, the inclination angle of the first punching and forming is 30 degrees to 45 degrees; in step 22, the inclination angle of the second punching and forming is 60 degrees to 80 degrees.

[0016] Through the above improvements, the inclination angle of the first punching punch for the first punching is 30 to 45 degrees, and the inclination angle of the second punching punch for the second punching is 60 to 80 degrees. Through gradual stamping, tearing of the punching can be prevented.

[0017] Furthermore, in step 3, the specific steps of the back-pier shaping include: Step 31, first back punching: during the forward feeding of the material strip, the first back punch on the stop plate performs the first back punching pressure on the punched hole, so as to reduce the bending angle generated in the process of straightening the punched hole in step 23; Step 32, second return punch: During the forward feeding of the material strip, the second return punch on the stop plate performs a second return punch on the hole. The second return punch increases the wall thickness of the hole and prevents the root from sinking. Step 33, pier forming: During the forward feeding of the material strip, the final features of the product are formed on the material strip by the forming punch on the stop plate.

[0018] Through the above improvements, the first return punch performs the first return punch on the hole, and the second return punch performs the second return punch on the hole. Through the two-step return punch operation, the wall thickness of the hole is increased, which is convenient for subsequent molding extrusion operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The process flow chart of a top cover sheet forming process with an integrated pressing ring is shown; Figure 2 It is a schematic diagram of the structure of a top cover sheet forming device with an integrated pressure ring when the mold is closed; Figure 3 It is a schematic diagram of the structure of a top cover sheet forming device with an integrated pressure ring when the mold is opened; Figure 4 This is a diagram showing the forming state of the material strip during the hole turning process of a top cover sheet forming process with an integrated pressure ring; Figure 5 This is a diagram of the material strip forming state when returning to the pier during the forming process of a top cover sheet with an integrated pressure ring.

[0020] Among them, 100, trimming and punching station; 101, first punching station; 102, second punching station; 103, punching and straightening station; 104, first return station; 105, second return station; 106, punching and forming station; 107, blanking; 108, scrap removal station; 1, upper die seat; 1.1, upper die plate; 1.2, stop plate; 1.21, first matching groove; 1.22, second matching groove; 1 .23, the third matching groove; 2, the lower die base; 2.1, the lower template; 2.2, the gap; 2.3, the shaping punch; 3, the material strip; 3.1, the center hole; 3.2, the hole; 3.3, the waste material; 4, the hole punching assembly; 4.1, the first hole punch; 4.2, the second hole punch; 4.3, the third hole punch; 5, the return punching assembly; 5.1, the first return punch; 5.2, the second return punch; 5.3, the forming punch. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] like Figures 1 to 5 The upper die base 1, the lower die base 2 and the material strip 3 are shown. The upper die base 1 includes an upper die plate 1.1 and a stop plate 1.2. The lower die base 2 includes a lower die plate 2.1. A gap 2.2 is provided between the lower die plate 2.1 and the stop plate 1.2. The material strip 3 is arranged in the gap 2.2, and a center hole 3.1 is punched out of the material strip 3. The lower die plate 2.1 is provided with a punching assembly 3.2. The punching assembly 3.2 includes a first punching punch 4.1 and a second punching punch 4.2 arranged in sequence. The stop plate 1.2 is provided with a back-piercing punching assembly 5. The back-piercing punching assembly 5 includes a first punching punch 4.1 and a second punching punch 4.2 arranged in sequence. The component 5 includes a first return punch 5.1 and a second return punch 5.2. When the mold is closed, the gap 2.2 is reduced, and the material strip 3 is respectively abutted against the upper end surface of the lower template 2.1 and the lower end surface of the stop plate 1.2, and the punching assembly 3.2 punches out toward the stop plate 1.2 to form the punching hole 3.2 on the material strip 3; the upper template 1.1 drives the stop plate 1.2 to be pressed downward, and the return punching assembly 5 punches out toward the lower template 2.1, and the first return punch 5.1 and the second return punch 5.2 return the punching hole 3.2 in turn, and the punching hole 3.2 on the material strip 3 is further processed.

[0024] The punching assembly for forming the hole 3.2 includes a first punch 4.1, a second punch 4.2 and a third punch 4.3. The stop plate 1.2 is provided with a first matching groove 1.21, a second matching groove 1.22 and a third matching groove 1.23. When the mold is closed, the end of the first punch 4.1 is matched and arranged in the first matching groove 1.21, and the end of the second punch 4.2 is matched and arranged in the second matching groove 1.22, so as to facilitate the forming of the punching hole 3.2.

[0025] The end of the third punch 4.3 is arranged in the third matching groove 1.23 to straighten the side wall of the punched hole 3.2, which is convenient for subsequent back-piercing and can also reduce the bending angle of the punched hole 3.2 to prevent interlayer from being generated during subsequent operations and affect the final forming of the product.

[0026] The return punch assembly 5 comprises a first return punch 5.1, a second return punch 5.2 and a forming punch 5.3. When the mold is closed, the forming punch 5.3 punches out toward the lower mold plate 2.1 to press the hole 3.2 downward to achieve the final forming.

[0027] A shaping punch 2.3 is provided on the lower template 2.1. When the first return punch is performed, the shaping punch 2.3 punches out toward the stop plate 1.2 through the hole 3.2, and the outer wall of the shaping punch 2.3 abuts against the inner wall of the hole 3.2. At this time, the first return punch 5.1 punches out toward the lower template 2.1, which can further reduce the bending angle of the hole 3.2 and increase the wall thickness of the side wall of the hole 3.2, which is convenient for subsequent forming.

[0028] The present invention also provides a forming process for a top cover sheet with an integrated pressure ring, the process flow is as follows: Figure 1 As shown, in the direction in which the material strip 3 is fed forward in steps, there are respectively provided a trimming and punching station 100, a first hole punching station 101, a second hole punching station 102, a hole punching and straightening station 103, a first return to the pier station 104, a second return to the pier station 105, a piercing and forming station 106, a blanking station 107 and a scrap cutting station 108.

[0029] Step 1, trimming and punching: the material strip 3 is fed into a punching device, and in the process of feeding the material strip 3 forward, trimming and punching are performed on the material strip 3, and trimming holes and a center hole 3.1 are formed on the material strip 3 in sequence.

[0030] Step 2, forming the punched hole 3.2: During the forward feeding of the material strip 3, the center hole 3.1 is punched out toward the stop plate 1.2 by the first punched hole punch 4.1 and the second punched hole punch 4.2 using a two-stage progressive punching method 3.2, and the punched hole 3.2 is straightened by the third punched hole punch 4.3 to provide forming material for the protruding welding ring portion above the top cover product.

[0031] In step 2, the specific steps of drilling 3.2 include: Step 21, first punching 3.2: During the process of feeding the material strip 3 forward, the center hole 3.1 on the material strip 3 is punched 3.2 for the first time by the first punching punch 4.1 on the lower die base 2.

[0032] Step 22, second hole punching 3.2: During the process of feeding the material strip 3 forward, the second hole punching 3.2 is performed by the second hole punch 4.2 on the lower die base 2.

[0033] Step 23, straightening the punched hole 3.2: During the forward feeding of the material strip 3, the third punching punch 4.3 on the lower die base 2 punches upward to straighten the formed punched hole 3.2.

[0034] The first punch 4.1 and the second punch 4.2 of the punching assembly for punching the hole 3.2 punch respectively punch the material strip 3, and the punching of the hole 3.2 is formed in two steps, which can prevent the punching of the hole 3.2 from being torn and causing the material strip 3 to be scrapped.

[0035] In step 21, the first punching punch 4.1 forms a first punching hole 3.2 at an inclination angle of 30 to 45 degrees. In step 22, the second punching hole 3.2 forms a second punching hole 3.2 at an inclination angle of 60 to 80 degrees. The punching hole 3.2 is prevented from tearing by gradual stamping.

[0036] Step 3, back-pressing and shaping: During the forward feeding process of the material strip 3, the material is squeezed down through the two-stage back-pressing to facilitate the subsequent molding and extrusion. The forming of the pole and the welding pressure ring is completed on the material strip 3 by the pier pressing method.

[0037] In step 3, the specific steps of the back-pier shaping include: Step 31, first back punching: During the forward feeding of the material strip 3, the first back punch 5.1 on the stop plate 1.2 performs the first back punching on the punched hole 3.2 to reduce the bending angle generated during the straightening of the punched hole 3.2 in step 23.

[0038] Step 32, second return punch: During the forward feeding of the material strip 3, the second return punch 5.2 on the stop plate 1.2 performs a second return punch on the punched hole 3.2. The second return punch increases the wall thickness of the punched hole 3.2 to prevent the root from sinking.

[0039] Step 33, pier forming: During the forward feeding process of the material strip 3, the final features of the product are formed on the material strip 3 by the forming punch 5.3 on the stop plate 1.2.

[0040] The first return punch 5.1 performs the first return punching on the turned hole 3.2, and the second return punch 5.2 performs the second return punching on the turned hole 3.2. Through the two-step return punching operation, the wall thickness of the turned hole 3.2 is increased, which is convenient for subsequent molding extrusion operations.

[0041] Step 4, blanking 107: During the process of feeding the material strip 3 forward, blanking 107 is performed after the product shape is cut out on the material strip 3 to obtain the final product.

[0042] Step 5, cutting off the waste 3.3: During the forward feeding process of the material belt 3, after the product is blanked 107, waste 3.3 is obtained on the material belt 3, and the waste is cut off.

[0043] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A top cover sheet forming device with integrated pressure ring, characterized in that: The invention comprises an upper die base (1), a lower die base (2) and a material strip (3), wherein the upper die base (1) comprises an upper die plate (1.1) and a stop plate (1.2), the lower die base (2) comprises a lower die plate (2.1), a gap (2.2) is arranged between the lower die plate (2.1) and the stop plate (1.2), the material strip (3) is arranged in the gap (2.2), and a center hole (3.1) is punched out on the material strip (3), the lower die plate (2.1) is provided with a punching assembly for punching holes (3.2), the punching assembly for punching holes (3.2) comprises a first punching punch (4.1) and a second punching punch (4.2) which are arranged in sequence, the stop plate (1.2) is provided with a punching assembly for punching holes (5), and the punching assembly for punching holes (5) is provided with a punching assembly for punching holes (5). The invention comprises a first return punch (5.1) and a second return punch (5.2); when the mold is closed, the gap (2.2) is reduced, the material strip (3) is respectively abutted against the upper end surface of the lower template (2.1) and the lower end surface of the stop plate (1.2), the punching assembly for forming the hole (3.2) is punched out in the direction of the stop plate (1.2), and the punching hole (3.2) is formed on the material strip (3); the upper template (1.1) drives the stop plate (1.2) to be pressed downward, the return punching assembly (5) is punched out in the direction of the lower template (2.1), the first return punch (5.1) and the second return punch (5.2) are used to return the hole (3.2) in turn, and the punching hole (3.2) is further processed on the material strip (3).

2. The top cover sheet forming device with integrated pressure ring according to claim 1, characterized in that: The punching assembly for punching holes (3.2) further comprises a third punching hole (4.3); the stop plate (1.2) is provided with a first matching groove (1.21), a second matching groove (1.22) and a third matching groove (1.23); when the mold is closed, the end of the first punching hole (4.1) is matched and arranged in the first matching groove (1.21); the end of the second punching hole (4.2) is matched and arranged in the second matching groove (1.22); the end of the third punching hole (4.3) is matched and arranged in the third matching groove (1.23); and when the third punching hole (4.3) is punched, the side wall of the punching hole (3.2) is straightened.

3. The top cover sheet forming device with integrated pressing ring according to claim 1, characterized in that: The lower template (2.1) is provided with a shaping punch (2.3). When the mold is closed, the shaping punch (2.3) punches out through the punch hole (3.2) toward the stop plate (1.2), and the outer wall of the shaping punch (2.3) abuts against the inner wall of the punch hole (3.2). The first return punch (5.1) punches out toward the lower template (2.1) to perform return shaping on the punch hole (3.2).

4. The top cover sheet forming device with integrated pressing ring according to claim 1, characterized in that: The return punching assembly (5) also includes a forming punch (5.3). When the mold is closed, the forming punch (5.3) punches out in the direction of the lower mold plate (2.1) to press the hole (3.2) downward to achieve final forming.

5. A pressure ring integrated top cover sheet forming process, used to control any one of the pressure ring integrated top cover sheet forming devices of claims 1-4, characterized in that: The molding method specifically comprises the following steps: Step 1, trimming and punching: feeding the material strip (3) into a punching device, and performing trimming and punching on the material strip (3) while the material strip (3) is being fed forward, and trimming holes and a center hole (3.1) are sequentially formed on the material strip (3); Step 2, forming and punching the hole (3.2): during the process of feeding the material strip (3) forward, the center hole (3.1) is punched out toward the stop plate (1.2) by a first punching punch (4.1) and a second punching punch (4.2) using a two-stage progressive punching method (3.2), and the punching hole (3.2) is straightened by a third punching punch (4.3) to provide forming material for the welding ring portion protruding above the top cover product; Step 3, back-pressing and shaping: during the forward feeding process of the material strip (3), the material is squeezed down by a two-stage back-pressing method to facilitate subsequent molding and extrusion, and the forming of the pole and the welding pressure ring is completed on the material strip (3) by means of pier pressing; Step 4, blanking (107): during the process of the material strip (3) being fed forward, blanking (107) is performed after the product shape is cut out on the material strip (3) to obtain the final product; Step 5, waste removal: During the forward feeding process of the material belt (3), waste is obtained on the material belt (3) after the product is dropped (107), and the waste is removed.

6. The forming process of a top cover sheet with an integrated pressure ring according to claim 5, characterized in that: In step 2, the specific steps of hole turning (3.2) include: Step 21, first punching (3.2): during the process of feeding the material strip (3) forward, the center hole (3.1) on the material strip (3) is punched for the first time (3.2) by the first punching punch (4.1) on the lower die base (2); Step 22, second hole punching (3.2): During the process of the material strip (3) being fed forward, the second hole punching (3.2) is performed by the second hole punch (4.2) on the lower die base (2); Step 23, straightening the punched hole (3.2): during the process of feeding the material strip (3) forward, the third punched hole punch (4.3) on the lower die base (2) punches upward to straighten the formed punched hole (3.2).

7. The forming process of a top cover sheet with an integrated pressure ring according to claim 6, characterized in that: In step 21, the first hole punching (3.2) is formed at an inclination angle of 30 to 45 degrees; in step 22, the second hole punching (3.2) is formed at an inclination angle of 60 to 80 degrees.

8. The forming process of a top cover sheet with an integrated pressing ring according to claim 5, characterized in that: In step 3, the specific steps of the back-pier shaping include: Step 31, first back-punching: during the forward feeding of the material strip (3), the first back-punching head (5.1) on the stop plate (1.2) performs the first back-punching on the punched hole (3.2), so as to reduce the bending angle generated during the straightening of the punched hole (3.2) in step 23; Step 32, second back punching: during the forward feeding process of the material belt (3), the second back punch (5.2) on the stop plate (1.2) performs a second back punching and back punching on the hole (3.2). The second back punching increases the wall thickness of the hole (3.2) and prevents the root from being sunken. Step 33, pier forming: During the process of the material strip (3) being fed forward, the final features of the product are formed on the material strip (3) by the forming punch (5.3) on the stop plate (1.2).

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