Adjustable universal profiling die

Abstract

The utility model belongs to the field of vehicle sheet metal part forming and manufacturing, and particularly relates to an adjustable universal profiling die which comprises an upper die plate, a lower die plate, a male die, a female die, a lower die fixing plate, an adjusting pad, an ejector rod, an ejector plate, a striker plate, a guide sleeve and a guide column. A female die is arranged between the male die and the upper surface of the lower die plate, grooves are formed in the symmetrical positions of the two sides of the upper surface of the lower die plate and used for installing a lower die fixing plate, a row of through holes are formed in the middle of the lower die plate in combination with a hydraulic machine and used for ejection of an ejection rod, an adjusting pad is placed between the lower die fixing plate and the female die, and the ejection rod is arranged in the middle of the lower die plate. The ejector rod is placed at a corresponding position of an oil press when the die is used. Various parts can be produced through one set of die, universality is achieved, the production efficiency of products can be effectively improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of forming and manufacturing of vehicle sheet metal parts, in particular to an adjustable universal pressing die suitable for forming and processing of vehicle sheet metal parts. Background Art

[0002] In the prior art, many U-shaped pressed parts appear in the design of prototype vehicles. Although they can be formed by a bending machine, there are the following disadvantages: some parts have requirements on the coaxiality of the holes, and the coaxiality of the holes cannot be guaranteed when the bending machine is used for bending; some parts will interfere when the bending machine is used for bending, and welding is required, which affects the strength and appearance of the parts; and some parts will squeeze the holes on the side when the bending machine is used for bending, causing the holes to deform.

[0003] For example, the size and shape of a vehicle part product 1 are shown in Figure 1-3 As shown, the material is 20CrMnTi steel plate with a thickness of 3mm. According to the drawing requirements, if laser cutting and bending machine forming are used for production, the coaxiality of the hole and the accuracy of the product shape cannot be guaranteed; if the hole is processed after forming, since the thickness of the plate is only 3mm, machine processing still cannot guarantee the accuracy of the hole; and the base number is large, both the labor cost of bending with a bending machine and the cost of machine processing are too large.

[0004] Another example is a U-shaped pressed part, i.e. product 2, whose size and shape are shown in Figure 4 As shown in the figure, the material is BS700MC steel plate with a thickness of 8mm. According to the drawing requirements, due to the notch on the bending edge, the dimension from the short side to the bottom is only 15mm. When the bending machine is used for bending, the notch cannot be subjected to force, which will cause the notch to tear and fail to be fully formed. According to the previous thinking, a square plate will be cut out, and the notch will be cut out by flame after bending. In this way, manual operation cannot guarantee the precision and roughness of the forming size, affecting the quality and appearance of the product. Utility Model Content

[0005] In order to solve the problems existing in the above-mentioned prior art, the utility model proposes an adjustable universal pressing mold, comprising an upper mold plate (1), a lower mold plate (3), a punch (2), a die (6), a lower mold fixing plate (4), an adjustment pad (5), a material ejection rod (7), a material ejection plate (8), a material blocking plate (9), a guide sleeve (18) and a guide column (19), wherein a groove is arranged in the middle position of the lower surface of the upper mold plate (1) for installing the punch (2), and the upper mold plate (1) and the punch (2) are fixed by screws (17) and pins (16); a die (6) is arranged between the punch (2) and the upper surface of the lower mold plate (3), and two screws (17) are arranged on the upper surface of the lower mold plate (3). A groove is set at a symmetrical position of the edge for installing a lower mold fixing plate (4). The lower mold plate (3) is fixed to the lower mold fixing plate (4) by bolts. A row of through holes is set in the middle position of the lower mold plate (3) in combination with a hydraulic press for a push rod (7) to push the material. An adjustment pad (5) is placed between the lower mold fixing plate (4) and the concave mold (6). The baffle plate (9) is fixed to the lower mold fixing plate (4) by using screws (11) and washers (12). A push rod (7) is set in the middle of the lower mold plate (3). The push rod (7) is placed in the corresponding position of the hydraulic press when the mold is used. The guide sleeve (18) and the guide column (19) are sleeved between the upper mold plate (1) and the lower mold plate (3).

[0006] Furthermore, the punch (2) is T-shaped, and the length and height of the punch (2) can be adjusted according to the actual size of the part. A row of threaded holes is arranged in the middle of the upper part of the punch (2) to cooperate with the upper template (1). Pin holes are arranged on the punch (2) for installing the upper template (1). The hole positions on the punch (2) are fixed structural designs and do not change with changes in the punch (2) except for the length. The lower part of the punch (2) is a molding part, which is used for part molding and changes according to the size and shape of the part.

[0007] Furthermore, the length of the concave die (6) is 500 mm per piece, with three pieces on each side. The number of concave dies used is determined according to the size of the parts, and the adjustment pad (5) is used to adjust the spacing of the concave dies (6).

[0008] Furthermore, the bolt (13) passes through the lower die fixing plate (4), the adjustment pad (5) and the concave die (6) for fixing, and a washer 2 (14) is arranged between the bolt (13) and the lower die fixing plate (4).

[0009] Furthermore, a ejector plate (8) is arranged between the ejector rod (7) and the punch (2), and the ejector plate (8) cooperates with the ejector rod (7) to eject the pressed part out of the mold. A long hole is arranged in the middle of the ejector plate (8) to adjust the position so that the part is centered.

[0010] Furthermore, a row of through holes is provided on the upper mold plate (1) for passing bolts to install the male mold (2).

[0011] Furthermore, lifting screws (15) are arranged on the outer sides of the upper template (1) and the lower template (3), and are respectively tightened with the upper template (1) and the lower template (3).

[0012] Furthermore, the guide sleeve (18) and the upper template (1) are fixed by means of an interference fit, and the guide post (19) and the lower template (3) are fixed by means of an interference fit.

[0013] The beneficial effects of the utility model are: in order to ensure product quality and production efficiency, it is also possible to save costs as much as possible, so that a set of molds can produce multiple parts. This set of molds can also be used in the subsequent production process, because of its versatility, it can effectively improve product production efficiency and reduce production costs. At the same time, it pays attention to the human-machine environment design, the mold is easy to use, safe and fast, and the labor intensity of the operator is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main view of product 1;

[0015] Figure 2 It is a top view of product 1;

[0016] Figure 3 This is the left view of product 1;

[0017] Figure 4 This is a schematic diagram of product 2;

[0018] Figure 5 It is a structural diagram of the utility model, wherein: 1. upper template, 2. punch, 3. lower template, 4. lower template fixing plate, 5. adjustment pad, 6. die, 7. ejector rod, 8. ejector plate, 9. baffle plate, 10. screw 1, 11. screw 2, 12. washer 1, 13. bolt, 14. washer 2, 15. lifting screw, 16. pin, 17. screw 3, 18. guide sleeve, 19. guide column;

[0019] Figure 6 These are two views of a U-shaped pressed part, where (a) is the right view and (b) is the main view. DETAILED DESCRIPTION

[0020] In order to better understand the purpose, technical solution and function of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings, but the utility model can be implemented in a variety of different ways defined and covered by the claims. The drawings that constitute a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation of the utility model.

[0021] 1. Overall idea of ​​mold

[0022] (1) Determine the mold size. In order to ensure that the mold can simultaneously complete the U-shaped parts pressing production of the vehicle model, the mold must have sufficient length, a large enough adjustment width, and sufficient depth.

[0023] (2) In order to meet the requirements of pressing parts of different materials and thicknesses, the mold must have sufficient strength.

[0024] (3) The mold must have a certain degree of versatility to maximize the utilization of the mold.

[0025] (4) The mold adjustment operation should be simple and clear to reduce the difficulty of operation.

[0026] (5) Pay attention to the human-machine environment design, the mold is easy, safe and quick to use, and the labor intensity of the operator is reduced.

[0027] 2. Mould solution

[0028] 2.1 Equipment determination

[0029] The selection of equipment directly affects a series of issues such as the effect, safety, product quality, service life of the mold, production efficiency and manufacturing cost of the finished product.

[0030] The important parameters to be considered for the press are: the allowable load of the press; the pressure required to complete the process; the stroke and number of strokes; the maximum die loading height; the work surface size of the press should be larger than the plane size of the mold, and there should be room for fixing the mold and the accuracy of the press.

[0031] In order to adapt to the hardness, thickness and size of various materials and maximize the versatility of the pressing die, and also for safety reasons, this set of molds should be used on a hydraulic press. Because the hydraulic press works slowly, has a pressure holding function, and will not overload, the YH27-500T hydraulic press is selected.

[0032] 2.2 Mould structure

[0033] like Figure 5 As shown in the figure, the key structures of the adjustable universal pressing die are the concave die and the convex die. After analysis, the concave die needs to adjust the spacing to adapt to different parts, which can be adjusted by adding or removing adjustment pads; the convex die is the main force-bearing structure and the key structure of the part molding quality. It needs to be integrally molded to increase its service life, and it is also extremely difficult to adjust its size. Therefore, the convex die is replaced to adapt to different parts.

[0034] The main structure of the mold includes the upper mold plate, the lower mold plate, the punch, the die, the lower mold fixing plate, the adjustment pad, the guide pin, the guide sleeve, etc. First, the size of the mold is determined, combined with the table size of the press and the size of the parts in the model and to maximize the versatility of the mold, and finally the size of the mold is determined to be 1500mm×800mm, and the mold height is 370mm.

[0035] 2.3 Design of main components

[0036] 2.3.1 Upper and lower template design

[0037] The upper and lower templates are the general outline of the entire mold, and the size is preferably determined to be 1500mm×800mm. Since the mold is relatively large, lifting screws need to be set on both sides of the upper and lower templates. In order to facilitate mold installation and improve mold accuracy, guide pins and guide sleeves are set to correct the mold. A groove is set in the middle of the upper template for installing the punch, and a row of through holes is set for passing bolts to install the punch. Two pin holes are also required for installing positioning pins to facilitate positioning and installation of the punch. The lower template is set with grooves on both sides for installing the lower mold fixing plate, and a row of through holes is set in the middle position in combination with the hydraulic press for the ejector rod to eject the material; in order to improve the accuracy of the die spacing, the upper surface of the lower template needs to be fine-machined.

[0038] 2.3.2 Punch design

[0039] The punch is designed in T-shape, and the length and height of the punch can be adjusted according to the actual part size. A row of threaded holes is set in the middle of the upper part to match the upper template, and two pin holes are set for installation on the upper template; the hole position of this structure is a fixed structural design, and does not change with the change of the punch except for the length; the lower part is the forming part, which is used for part forming and changes according to the size and shape of the part.

[0040] 2.3.3 Design of lower die fixing plate, concave die and adjustment pad

[0041] The length of the die is 500mm per piece, with three pieces on each side. The number of dies to be used can be determined according to the size of the part. The adjustment pad is a key part for adjustment. The left and right sides are fine-machined to achieve excellent flatness and finish. The fewer the number of adjustment pads used, the better, to minimize the impact of tolerance accumulation on the die spacing. The lower die fixing plate is used to fix the die, and the die spacing can be adjusted in combination with the adjustment pad. The lower die fixing plate is fixed to the lower mold plate with bolts. When the die spacing is adjusted with the adjustment pad, use long bolts to fix the lower die fixing plate, adjustment pad, and die.

[0042] 2.3.4 Baffle plate design

[0043] The lower die fixing plate is the part on the outside of the lower die and is a fixed structure, so the baffle plate can be fixed to the lower die fixing plate with bolts; since the die is 500mm per piece, the convex and concave dies are generally longer than the part size during design, and the part can be manually centered in the length direction; a baffle plate is required in the width direction to position the part. Since the parts are of different sizes, a long hole is required in the middle of the ejector plate to adjust the position so that the part is centered.

[0044] 2.3.5 Design of top plate

[0045] The ejector plate is usually a long plate with a thickness of 30mm. It is mainly used to cooperate with the ejector rod to knock the pressed parts out of the mold. If there are special needs, it can also be used for positioning. For example, product 1 has requirements for the coaxiality of the hole, so using the ejector plate for positioning is the best choice.

[0046] 2.3.6 Selection of standard parts

[0047] Guide pins, guide sleeves, bolts, washers, pins, lifting screws, etc. are selected as standard parts according to the international standard manual and cold stamping die standard manual.

[0048] 2.3.7 Assembly methods of various components

[0049] The upper template 1 and the punch 2 are fixed by means of screw three 17 and pin 16, the lower template 3 and the lower mold fixing plate 4 are fixed by bolts, an adjustment pad 5 is placed between the lower mold fixing plate 4 and the die 6 and fixed by bolts 13 and washer two 14, the baffle plate 9 is fixed to the lower mold fixing plate 4 by screw two 11 and washer one 12, the guide sleeve 18 and the upper template 1 are fixed by interference fit, the guide column 19 and the lower template 3 are fixed by interference fit, the lifting screws 15 can be tightened with the upper template 1 and the lower template 3 respectively, and the ejector rod 7 needs to be placed in the corresponding position of the hydraulic press when the mold is in use.

[0050] 2.4 Selection of materials for main components

[0051] 2.4.1 Selection of convex and concave die materials

[0052] In order to maximize the versatility of this set of molds, considering that the material, thickness and hardness of the parts to be manufactured are all possible, the materials of the male and female molds are both T10A, a tool steel with good machinability and low price, with heat treatment hardness of 58~62HRC.

[0053] 2.4.2 Materials of ejector rod, ejector plate and lower die fixing plate

[0054] The ejector rod, ejector plate and lower die fixing plate are all parts that are often subjected to stress, so 45 steel with high strength, good plasticity and toughness is selected, which is low in cost; heat treatment hardness: 40~45HRC.

[0055] 2.4.3 The materials for other parts of the mold are carbon structural steel Q235, which has low production cost.

[0056] 2.5 Closing height of mold

[0057] The mold closing height refers to the distance between the upper and lower mold bases when the mold is in the lowest working position. It should also be adapted to the mold loading height of the press.

[0058] The die height of a press refers to the distance between the ground of the slide and the plane on the worktable when the slide is at the bottom dead center. Generally, the connecting rod in the slide of a press has a certain adjustment amount. When the connecting rod of the press is adjusted to the shortest, it is the maximum die height of the press; when the connecting rod of the press is adjusted to the longest, it is the minimum die height of the press.

[0059] The die loading height of the press must meet the requirements of the die closing height. The relationship is:

[0060] H max -5≥H≥H min +10, where H max , H min are the maximum and minimum die loading heights of the press, and H is the closing height of the mold.

[0061] If the mold closing height is too small, a pad must be added to the workbench of the press when using it. The mold closing height must be less than the mold loading height of the selected press.

[0062] The closing height of this set of compound mold = upper mold plate + punch - 20 + part thickness + ejector plate + lower mold plate = 370mm.

[0063] 2.6 Mould Installation

[0064] The workbench of the press has two platforms, upper and lower. When installing the mold, the upper mold of the mold is installed on the upper platform of the press, and the lower mold of the mold is installed on the lower platform of the press. The lower platform usually has bolt holes and installation slots, and is fixed and connected by pressing plates and bolts. The upper platform depends on the structure of the workbench of the press.

[0065] (1) Die handle connection

[0066] There is a round hole in the center of the upper table, which is used to lock the mold handle connection. Usually, a pressure plate and bolts are used to tighten and fix the connection.

[0067] (2) Pressure plate and bolt connection

[0068] There are bolt through holes and installation slots on the upper platform, which need to be tightened and fixed by pressing plates and bolts.

[0069] (3) Dovetail connection

[0070] There is a T-slot on the upper platform, which needs to be connected with a dovetail groove.

[0071] This compound mold equipment uses a YH27-500T hydraulic press. The upper and lower platforms have bolt holes and installation slots, which can be fixed and connected by pressing plates and bolts.

[0072] 2.7 Mould working process

[0073] At the beginning of the working stroke, the upper die moves downward, and stops when the part is completely within the gap between the concave dies. The upper die moves upward, and finally the ejector pin is used to knock the part out.

[0074] 2.8 Versatility of mold

[0075] This set of molds can produce U-shaped pressed parts, such as Figure 6 As shown, the parts that can be produced meet the following conditions: H≤170, 30≤W≤200, L≤1500, and unfolded width≤480.

[0076] The utility model can not only ensure production efficiency and improve product quality, but also save costs, and has the following main features:

[0077] 1. The die spacing can be adjusted by adjusting pads, which is convenient and easy to operate.

[0078] 2. The punch can be replaced.

[0079] 3. A variety of U-shaped profiles can be manufactured to save costs.

[0080] 4. It has certain versatility, which provides convenience for subsequent production.

[0081] In the specific implementation, the material of product 1 is 20CrMnTi steel plate with a thickness of 3mm. According to the requirements of the drawings, if you want to ensure the coaxiality of the hole and the accuracy of the product shape and save costs, the best way is to use a press mold for production. The material of product 2 is BS700MC steel plate with a thickness of 8mm. According to the requirements of the drawings, due to the notch on its bending edge, the size from the short side to the bottom is only 15mm. When the bending machine is used for bending and forming, the notch cannot be subjected to force, which will cause the notch to tear and cannot be fully formed. According to the previous thinking, a square plate will be cut out, and the notch will be flame cut out after bending and forming. In this way, manual operation cannot guarantee the accuracy and roughness of the forming size, affecting the quality and aesthetics of the product. Therefore, the best way for product 2 is still to use a press mold for production. In addition, this model has other U-shaped parts that need to be produced. In summary, it fully meets the design requirements of an adjustable universal press mold. A variety of parts can be produced through a set of press molds to achieve the purpose of saving production costs and improving production efficiency.

[0082] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An adjustable universal pressing die, characterized in that: The invention comprises an upper mold plate (1), a lower mold plate (3), a punch (2), a die (6), a lower mold fixing plate (4), an adjustment pad (5), a material ejection rod (7), a material ejection plate (8), a material blocking plate (9), a guide sleeve (18) and a guide column (19); a groove is arranged in the middle of the lower surface of the upper mold plate (1) for installing the punch (2); the upper mold plate (1) and the punch (2) are fixed by screws (17) and pins (16); a die (6) is arranged between the punch (2) and the upper surface of the lower mold plate (3); grooves are arranged at symmetrical positions on both sides of the upper surface of the lower mold plate (3) for installing the lower mold fixing plate The lower mold plate (4) is fixed to the lower mold fixing plate (4) by bolts. A row of through holes is arranged in the middle of the lower mold plate (3) in combination with a hydraulic press for a material ejection rod (7). An adjustment pad (5) is placed between the lower mold fixing plate (4) and the concave mold (6). The baffle plate (9) is fixed to the lower mold fixing plate (4) by screws (11) and washers (12). A material ejection rod (7) is arranged in the middle of the lower mold plate (3). The material ejection rod (7) is placed in the corresponding position of the hydraulic press when the mold is used. A guide sleeve (18) and a guide column (19) are sleeved between the upper mold plate (1) and the lower mold plate (3).

2. The adjustable universal pressing die according to claim 1, characterized in that: The punch (2) is T-shaped, and the length and height of the punch (2) can be adjusted according to the actual size of the part. A row of threaded holes is arranged in the middle of the upper half of the punch (2) to cooperate with the upper template (1). Pin holes are arranged on the punch (2) for installing the upper template (1). The hole positions on the punch (2) are fixed structural designs and do not change with the change of the punch (2) except for the length. The lower half of the punch (2) is a molding part, which is used for part molding and changes according to the size and shape of the part.

3. The adjustable universal pressing die according to claim 1, characterized in that: The length of the concave die (6) is 500 mm per piece, and there are three pieces on each side. The number of concave dies to be used is determined according to the size of the parts. The adjustment pad (5) is used to adjust the spacing of the concave dies (6).

4. The adjustable universal pressing die according to claim 1, characterized in that: The bolt (13) passes through the lower die fixing plate (4), the adjustment pad (5) and the concave die (6) for fixing, and a washer 2 (14) is arranged between the bolt (13) and the lower die fixing plate (4).

5. The adjustable universal pressing die according to claim 1, characterized in that: A ejector plate (8) is arranged between the ejector rod (7) and the punch (2). The ejector plate (8) cooperates with the ejector rod (7) to eject the pressed part out of the mold. A long hole is arranged in the middle of the ejector plate (8) to adjust the position so that the part is centered.

6. The adjustable universal pressing die according to claim 1, characterized in that: The upper mold plate (1) is provided with a row of through holes for passing bolts to install the convex mold (2).

7. The adjustable universal pressing die according to claim 1, characterized in that: Lifting screws (15) are arranged on the outer sides of the upper template (1) and the lower template (3) and are respectively tightened with the upper template (1) and the lower template (3).

8. The adjustable universal pressing die according to claim 1, characterized in that: The guide sleeve (18) and the upper template (1) are fixed by means of interference fit, and the guide post (19) and the lower template (3) are fixed by means of interference fit.

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