A pressure ring integrated top cover sheet forming device and forming process thereof

Abstract

The cam is provided with a plurality of holes, and the cam is provided with a plurality of holes, and the holes are respectively formed on the cam and the cam, and the cam is provided with a plurality of holes.

Description

Technical Field

[0001] The present 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 still need to be welded to connect the top cover and the welding pressure ring. An additional welding process needs to be added 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 lead to scrapping of the material strip. In addition, 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, which increases the workload of the operator. Summary of the Invention

[0003] In view of the shortcomings and defects of the existing technology, a top cover sheet forming device and a forming process thereof are provided. In order 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 camming tool of the present invention is a device for forming a top cover sheet with an integrated pressure ring, comprising an upper die base, a lower die plate and a material strip, the upper die base comprising an upper die plate and a stop plate, the lower die base comprising a lower die plate, a gap being provided between the lower die plate and the stop plate, the material strip being arranged in the gap, and a center hole being punched out of the material strip, the lower die plate being provided with a punching punch assembly, the punching punch assembly comprising a first punching punch and a second punching punch which are arranged in sequence, a return punching assembly being provided on the stop plate, the return punching assembly comprising a first return punch and a second return punch, the gap being reduced when the die is closed, the material strip respectively abuts against the upper end face of the lower die plate and the lower end face of the stop plate, the punching punch assembly punches out toward the stop plate to form a punching hole on the material strip; the upper die plate drives the stop plate to press downward, the return punching assembly punches out toward the lower die plate, the first return punch and the second return punch return the punching hole in sequence, and the punching hole is further processed on the material strip.

[0005] Compared with the prior art, the present application sets 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 head, 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 head is matched and set in the first matching groove, the end of the second punching head is matched and set in the second matching groove, and the end of the third punching head is matched and set in the third matching groove. When the third punching head is punching, the side wall of the punching head is straightened.

[0007] Through the above improvements, the punching assembly includes a third 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 punch is matched and arranged in the first matching groove, and the end of the second punch is matched and arranged in the second matching groove, which facilitates the forming of the punched hole; the end of the third punch is matched and arranged in the third matching groove, which straightens the side wall of the punched hole, facilitates the subsequent re-piercing, and can also reduce the bending angle of the punched hole to prevent the generation of interlayer during subsequent operations, affecting 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 toward the stop plate through the flip hole, and the outer wall of the shaping punch abuts against the inner wall of the flip hole. The first return punch punches out toward the lower template to perform back-piercing shaping on the flip hole.

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

[0010] Furthermore, the return pier punching assembly also includes a forming punch. When the mold is closed, the forming punch punches out toward the lower template, pressing the flip hole downward to achieve final forming.

[0011] Through the above improvements, the return pier stamping assembly also includes a forming punch, and the stamping 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, wherein the molding process specifically comprises the following steps:

[0013] Step 1: Trimming and punching: Feed the material strip into the stamping equipment. During the forward feeding process of the material strip, trimming and punching are performed on the material strip, and trimming holes and center holes are formed on the material strip in sequence.

[0014] Step 2: Forming and punching: During the forward feeding of the material strip, the center hole is punched out toward the stop plate using a two-stage progressive punching method using the first punch and the second punch, and the punched hole is straightened using the third punch to provide forming material for the protruding welding ring portion above the top cover product.

[0015] Step 3, back-press shaping: During the forward feeding of the material strip, the material is squeezed down by a two-stage back-press to facilitate subsequent molding and extrusion. The pole and welding ring are formed on the material strip by the way of pier pressing;

[0016] Step 4, blanking: During the forward feeding of the material strip, the product shape is cut out on the material strip and then blanking is performed to obtain the final product;

[0017] Step 5: Waste removal: During the forward feeding of the material belt, waste is obtained on the material belt after the blanking is completed, and the waste is removed.

[0018] Furthermore, in step 2, the specific steps of turning the hole include:

[0019] 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;

[0020] Step 22, second hole turning: During the process of the material strip being fed forward, the second hole turning punch on the lower die base is used to perform the second hole turning;

[0021] Step 23, straightening the hole: During the forward feeding of the material strip, the third hole punch on the lower die base is used to punch upward to straighten the formed hole.

[0022] 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 realized in two steps, which can prevent the punching from tearing and causing the material strip to be scrapped.

[0023] 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.

[0024] Through the above improvements, the inclination angle of the first punch when the first punch is used to punch the hole is 30 degrees to 45 degrees, and the inclination angle of the second punch when the second punch is used to punch the hole is 60 degrees to 80 degrees. Through gradual stamping and forming, the hole tearing can be prevented.

[0025] Furthermore, in step 3, the specific steps of the back-pier shaping include:

[0026] 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 on the punched hole to reduce the bend angle generated during the straightening of the punched hole in step 23;

[0027] 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.

[0028] Step 33: Pressing and 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.

[0029] Through the above improvements, the first return punch performs the first return punch on the flipped hole, and the second return punch performs the second return punch on the flipped hole. Through the two-step return punch operation, the wall thickness of the flipped hole is increased, which is convenient for subsequent forming and extrusion operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a process flow chart of a top cover sheet forming process with an integrated pressure ring;

[0031] Figure 2 This is a schematic diagram of the structure of a top cover sheet forming device with an integrated pressure ring during mold closing;

[0032] Figure 3 This is a schematic structural diagram of a top cover sheet forming device with an integrated pressure ring during mold opening;

[0033] Figure 4 This is a diagram showing the forming state of the material strip during the hole-turning process of a top cover sheet with an integrated pressure ring;

[0034] Figure 5 This is a diagram of the material strip forming state during the return process of a top cover sheet with an integrated pressure ring.

[0035] 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 base; 1.1, upper die plate; 1.2, stop plate; 1.21, first matching groove; 1.22, second matching groove; 1 .23. Third matching groove; 2. Lower die base; 2.1. Lower template; 2.2. Gap; 2.3. Shaping punch; 3. Material strip; 3.1. Center hole; 3.2. Folding hole; 3.3. Waste material; 4. Folding punch assembly; 4.1. First folding punch; 4.2. Second folding punch; 4.3. Third folding punch; 5. Return punch assembly; 5.1. First return punch; 5.2. Second return punch; 5.3. Forming punch. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] like Figures 1 to 5 The figure shows an upper die base 1, a lower die base 2 and a material strip 3. 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 provided 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 return punching assembly 5. The return punching assembly 5 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. The punching component for punching the hole 3.2 punches out toward the stop plate 1.2 to form the hole 3.2 on the material strip 3; the upper template 1.1 drives the stop plate 1.2 to press down, and the return punching component 5 punches out toward the lower template 2.1. The first return punch 5.1 and the second return punch 5.2 return the hole 3.2 in turn, and the hole 3.2 is further processed on the material strip 3.

[0039] The punching assembly for turning 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 in the first matching groove 1.21, and the end of the second punch 4.2 is matched in the second matching groove 1.22, which facilitates the forming of the punching hole 3.2.

[0040] The end of the third punch 4.3 is fitted into the third fitting groove 1.23 to straighten the side wall of the punched hole 3.2, facilitating subsequent resetting. At the same time, it can also reduce the bending angle of the punched hole 3.2 to prevent interlayer formation during subsequent operations, which affects the final forming of the product.

[0041] The return punch assembly 5 includes 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 template 2.1, presses down the flip hole 3.2 to achieve the final forming.

[0042] A shaping punch 2.3 is provided on the lower template 2.1. During the first return, the shaping punch 2.3 punches out through the opening 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 opening 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 opening 3.2 and increase the wall thickness of the side wall of the opening 3.2, facilitating subsequent forming.

[0043] The present invention also provides a top cover sheet forming process with an integrated pressure ring, the process flow is as follows: Figure 1 As shown, in the direction of the material strip 3 stepping forward, there are respectively provided with a trimming and punching station 100, a first punching station 101, a second punching station 102, a punching and straightening station 103, a first return station 104, a second return station 105, a punching and forming station 106, a blanking station 107 and a waste cutting station 108.

[0044] Step 1, trimming and punching: the material strip 3 is fed into the punching equipment. During the forward feeding process of the material strip 3, trimming and punching are performed on the material strip 3. The trimming holes and the center hole 3.1 are formed on the material strip 3 in sequence.

[0045] Step 2, forming the hole 3.2: During the forward feeding process of the material strip 3, the center hole 3.1 is turned out toward the stop plate 1.2 by the first hole punch 4.1 and the second hole punch 4.2 using a two-stage progressive hole punch 3.2, and the hole 3.2 is straightened by the third hole punch 4.3 to provide forming material for the protruding welding ring part above the top cover product.

[0046] In step 2, the specific steps of drilling 3.2 include:

[0047] Step 21, first punching 3.2: During the forward feeding process of the material strip 3, 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.

[0048] Step 22, second hole turning 3.2: During the process of feeding the material strip 3 forward, the second hole turning 3.2 is performed by the second hole turning punch 4.2 on the lower die base 2.

[0049] Step 23, straightening the folded hole 3.2: During the forward feeding process of the material strip 3, the third folded hole punch 4.3 on the lower die base 2 punches upward to straighten the formed folded hole 3.2.

[0050] The first punch 4.1 and the second punch 4.2 of the punching assembly punch the material strip 3 respectively, and the punching 3.2 is formed in two steps, which can prevent the punching 3.2 from being torn and causing the material strip 3 to be scrapped.

[0051] In step 21, the first punching punch 4.1 forms a first punching hole 3.2 with an inclination angle of 30 to 45 degrees. In step 22, the second punching hole 3.2 forms a second punching hole 3.2 with an inclination angle of 60 to 80 degrees. By gradually stamping, the punching hole 3.2 can be prevented from tearing.

[0052] Step 3, back-press shaping: During the forward feeding process of the material strip 3, the material is squeezed down by a two-stage back-press to facilitate 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.

[0053] In step 3, the specific steps of the back-pier shaping include:

[0054] 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 to reduce the bend angle generated during the straightening of the punched hole 3.2 in step 23.

[0055] 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 hole 3.2. The second return punch increases the wall thickness of the hole 3.2 to prevent the root from sinking.

[0056] Step 33, pier forming: During the forward feeding 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.

[0057] 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 and extrusion operations.

[0058] Step 4, blanking 107: During the forward feeding process of the material strip 3, blanking 107 is performed after the product shape is cut out on the material strip 3 to obtain the final product.

[0059] Step 5, cutting off the waste 3.3: During the forward feeding process of the material belt 3, after the blanking 107 of the product is completed, waste 3.3 is obtained on the material belt 3, and the waste is cut off.

[0060] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that improvements and modifications that do not depart from the principles of the present invention are within the scope of protection of the present invention.

Claims

1. A top cover sheet forming device with an integrated pressure ring, characterized in that: The invention comprises an upper die base (1), a lower die base (2) and a material strip (3); the upper die base (1) comprises an upper template (1.1) and a stop plate (1.2); the lower die base (2) comprises a lower template (2.1); a gap (2.2) is provided between the lower template (2.1) and the stop plate (1.2); the material strip (3) is provided in the gap (2.2); a center hole (3.1) is punched out of the material strip (3); a punching assembly for turning a hole (3.2) is provided on the lower template (2.1); the punching assembly for turning a hole (3.2) comprises a first punching head (4.1) and a second punching head (4.2) which are arranged in sequence; a return punching assembly (5) is provided on the stop plate (1.2); the return punching assembly (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 pressed against the upper end surface of the lower template (2.1) and the lower end surface of the stop plate (1.2); the punch assembly for punching the hole (3.2) is punched out in the direction of the stop plate (1.2), and the 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, and the return punch 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 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 the hole (3.2) further comprises 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 die is closed, the end of the first punch (4.1) is matched and arranged in the first matching groove (1.21); the end of the second punch (4.2) is matched and arranged in the second matching groove (1.22); the end of the third punch (4.3) is matched and arranged in the third matching groove (1.23); and the third punch (4.3) straightens the side wall of the punching hole (3.2) when punching.

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

4. The top cover sheet forming device with integrated pressure ring according to claim 1, characterized in that: The return pier punching assembly (5) also includes 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 flip hole (3.2) downward to achieve final forming.

5. A process for forming a top cover sheet with an integrated pressure ring, used to control the device for forming a top cover sheet with an integrated pressure ring according to any one of claims 1 to 4, characterized in that: The molding method specifically includes the following steps: Step 1: trimming and punching: feeding the material strip (3) into the punching equipment, and performing trimming and punching on the material strip (3) while the material strip (3) is being fed forward, and forming trimming holes and a center hole (3.1) on the material strip (3) in sequence; Step 2: Forming the hole (3.2): During the forward feeding of the material strip (3), the center hole (3.1) is turned out toward the stop plate (1.2) by using a two-stage progressive hole turning (3.2) through the first hole turning punch (4.1) and the second hole turning punch (4.2), and the hole (3.2) is straightened by the third hole turning punch (4.3), thereby providing 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. The pole and welding pressure ring are formed on the material strip (3) by means of pier pressing; Step 4: Blanking (107): During the forward feeding process of the material strip (3), the product shape is cut out on the material strip (3) and then blanking (107) is performed 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 blanked (107) and the waste is removed.

6. The process for forming 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 hole 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 hole punch (4.1) on the lower die base (2); Step 22: Second hole turning (3.2): During the process of the material strip (3) being fed forward, the second hole turning punch (4.2) on the lower die base (2) is used to perform the second hole turning (3.2); Step 23: Straightening the folded hole (3.2): During the forward feeding process of the material strip (3), the third folded hole punch (4.3) on the lower die base (2) is punched upward to straighten the formed folded hole (3.2).

7. The process for forming 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 process for forming a top cover sheet with an integrated pressure ring according to claim 5, characterized in that: In step 3, the specific steps of the back-pier shaping include: Step 31: First back-pressing: 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-pressing on the hole (3.2), thereby reducing the bend angle generated during the straightening of the hole (3.2) in step 23; Step 32: Second back-pressing: During the forward feeding process of the material strip (3), the second back-punch (5.2) on the stop plate (1.2) performs a second back-pressing on the hole (3.2). The second back-pressing increases the wall thickness of the hole (3.2) and prevents the root from sinking. Step 33: Pressing and forming: During the forward feeding 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).

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