Die structure for negative angle flanging

Abstract

The application discloses a die structure for negative angle flanging, which comprises an upper die part and a lower die part, the upper die part is provided with a side flanging structure, and the lower die part is provided with a negative angle interaction mechanism; the side flanging mechanism comprises an upper slider arranged on an upper die base, and the upper slider is provided with a flanging punch; a gun-shaped carrier loaded by the flanging punch is provided with a slider retreat pressure source, the lower die base is provided with a driving block matched with a gun handle part of the gun-shaped carrier, the driving block is provided with an inclined working surface, and the inclined working surface of the driving block is provided with a sliding matched driving guide plate; the negative angle interaction mechanism comprises a flanging die assembly arranged on the lower die base, a trolley assembly arranged on the lower side of the flanging die assembly and a driving assembly. The die structure can complete a small flanging action through the cooperation of the side flanging mechanism and the negative angle interaction mechanism, and the product can be smoothly taken out even if the product has a negative angle after the flanging action is completed.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and in particular to a die structure for negative angle flanging. Background Technology

[0002] For special types of stamped parts (such as automotive door and window frame sheet metal parts), the upper negative angle flange (which is used to install corresponding parts inside the automotive door) has a large mold size due to space and angle issues, and it is difficult to adjust the stamping angle within the same mold. The present invention aims to provide a mold mechanism for negative angle flanges of stamping molds to realize negative angle flanges of stamped parts, which is of great significance for reducing the size of tooling and reducing the number of molds. Summary of the Invention

[0003] The present invention aims to solve the above-mentioned technical problems and provide a mold structure for negative angle flanging, which facilitates the completion of small flanging actions and allows the product to be easily removed even if the product has a negative angle after the flanging action is completed.

[0004] To solve the above-mentioned technical problems, embodiments of the present invention provide a mold structure for negative angle flanging, comprising:

[0005] The upper die part is installed on the upper press and moves up and down and reciprocates synchronously with the upper press. The upper die part is equipped with a stamping unit for forming the sheet metal parts of the car door and window frame.

[0006] The lower die part is installed on the lower press and cooperates with the upper die part. The lower die part is equipped with a lower forming stamping unit for the sheet metal parts of the car door and window frame.

[0007] The upper mold part is equipped with a side flange structure, and the lower mold part is equipped with a negative angle interaction mechanism;

[0008] The side-flanging mechanism includes an upper slide block disposed on the upper mold base. The upper slide block is provided with a flanging punch. The upper slide block includes a gun-shaped carrier. The flanging punch is installed at the V-shaped insert structure of the gun-shaped carrier. The gun-shaped carrier includes a gun handle and a gun body. The gun body is provided with a limiting screw located at the limiting screw hole provided on the upper mold base. The limiting screw can prevent the cover plate from falling off and the slide block from falling off, thus playing a safety prevention role in preventing the slide block from falling off. The gun handle has a side limiting block with a hook on its side. The drive block has a drive block side guide block that cooperates with the side limiting block. The belly of the gun handle has a working boss with a slope. The flanging punch has a flanging punch seat head that is obliquely arranged on the gun carrier. A square block is provided at one corner of the flanging punch seat head. A column extends vertically from the square block. A Z-shaped forming surface structure is provided at the front end of the column. The upper die base is provided with a flanging punch stroke groove. An obliquely arranged flanging punch column moving hole is provided in the flanging punch stroke groove.

[0009] The flanging punch is equipped with a gun-shaped carrier with a slide retraction pressure source. The lower die base is equipped with a drive block that cooperates with the gun handle of the gun-shaped carrier. The drive block is equipped with an inclined working surface. The inclined working surface of the drive block is equipped with a sliding drive guide plate. The upper die base is equipped with an anti-dropping guide mechanism to guide the upper slide and prevent the upper slide from falling off.

[0010] The negative angle interaction mechanism includes a flanging die assembly mounted on the lower die base, a trolley assembly mounted on the lower side of the flanging die assembly, and a drive assembly. The drive assembly includes a drive wedge insert device mounted on the upper die base, and the drive wedge insert device is equipped with an anti-side guide plate. The flanging die assembly includes a flanging die fixing seat and a flanging die mounted on the flanging die fixing seat. One of the seats of the flanging die fixing seat is equipped with a reset pressure block, and a reset spring is provided between the reset pressure block and the flanging die. The two cantilever end faces of the flanging die fixing seat are equipped with wedge cover plates for limiting the flanging die. The bottom of the flanging die is equipped with a wedge insert plate. The trolley assembly includes a trolley guide plate mounted on the lower die base and a trolley body mounted on the sliding guide plate. The sliding body is equipped with a return spring, and a spring stop block that cooperates with the return spring is provided on the lower die base. The U-shaped drive assembly protective seat of the lower die base is equipped with an anti-side boss that cooperates with the anti-side guide plate.

[0011] As can be seen from the above, this mold structure, through the combination of the side-flipping mechanism and the negative angle interaction mechanism, can complete a small-scale flipping action while ensuring smooth product removal even when the product has a negative angle after the flipping action is completed. Except for the need for nitrogen springs to reset the side-flipping mechanism and the negative angle interaction mechanism, the entire small-scale flipping action requires no additional power source, greatly reducing the complexity of the structure.

[0012] Furthermore, the trolley body is L-shaped, and a passive wedge plate with a guide ramp is installed at the step position of the vertical trolley arm of the trolley body. The lateral trolley seat of the trolley body is provided with a lateral trapezoidal guide block with a guide ramp.

[0013] In the mold structure for negative angle flanging provided by the present invention, a buffer block for an upper slider is provided on the upper surface of the gun body of the gun-shaped carrier. The buffer block has a trapezoidal rear seat body, and an L-shaped front seat body is provided on the front side of the trapezoidal rear seat body facing the gun body. After the punching work is completed and the wedge is reset, the slider is subjected to a large impact force due to the pressure source being a nitrogen spring. The buffer block is designed to buffer the impact force on the slider and improve its service life.

[0014] The upper mold base has a passive guide groove in which a stop block that cooperates with the buffer block is installed through a U-shaped stop block fixing seat.

[0015] In the mold structure for negative angle flanging provided by the present invention, the two sides of the gun body are respectively provided with a square elongated first side wing and a second side wing;

[0016] The rear of the gun body is provided with an upward-raising rear platform, and the front of the gun body is provided with an upward-raising front platform.

[0017] Z-shaped elevated step structures are located at the bottom of the first and second side wings.

[0018] In the mold structure for negative angle flanging provided by the present invention, the upper mold base is provided with an upper slider mounting position, the upper slider mounting position includes a passive guide upper groove body, the groove end of the passive guide upper groove body is provided with a stepped cylinder assembly seat, the passive guide upper groove body is provided with a first upper slider cover plate assembly seat and a second upper slider cover plate assembly seat distributed along the movement direction of the upper slider, the top of the passive guide upper groove body is provided with a gun body front lifting platform slider mounting seat and a gun body rear lifting platform slider mounting seat, the side of the first upper slider cover plate assembly seat is provided with a protruding first gun body side slider mounting seat, and the side of the second upper slider cover plate assembly seat is provided with a protruding second gun body side slider mounting seat;

[0019] The passive guide groove is equipped with a multi-directional guide system for the upper slider that cooperates with the upper slider.

[0020] In the mold structure for negative angle flanging provided by the present invention, the flanging die fixing seat includes a horizontally arranged rear fixing seat tail, the rear fixing seat is provided with an arm seat body, the arm seat body is suspended with two upwardly curved and inclined seat arms, and the maintenance space of the arm seat body and the two seat arms is the oblique movement space of the flanging die.

[0021] The two arm seats are provided with a side slider mounting seat for the flanging die on the side wall facing the oblique motion space of the flanging die, and a back slider mounting seat for the flanging die is provided on the side wall facing the oblique motion space of the flanging die.

[0022] The two armrests and the corner of the armrest body form a D-shaped channel structure.

[0023] The present invention provides a mold structure for negative angle flanging, in which the negative angle interaction mechanism is a non-standard mechanism specifically designed for product characteristics. It is primarily used when conventional standard mechanisms cannot achieve the desired result, or when the negative angle of the product prevents part removal. The negative angle interaction mechanism is mainly located in the lower mold section. The most important reason is that after the small flanging action is completed, the product needs to be removed. If the lower mold is fixed, although the flanging action can be achieved, the flanged product, due to its negative angle, will be "stuck" in the lower mold and cannot be removed. Therefore, the movable die needs to retract along the stamping square to disengage from the negative angle area of ​​the product before it can be removed. Thus, the negative angle interaction mechanism provided by the inventor mainly consists of a flanging die assembly, a trolley assembly, and a drive assembly, converting the vertical force of the machine tool into a force at a certain angle to the stamping direction, thereby realizing the stamping operation of the product characteristics.

[0024] The present invention provides a mold structure for negative angle flanging. The flanging die assembly is assembled from various parts. The flanging die is confined within a fixed block and can reciprocate in the punching direction as much as possible during the stamping process, thereby avoiding the negative angle, forming the product features and removing parts during the production process.

[0025] The present invention provides a mold structure for negative angle flanging, wherein the main body of the flanging die is a casting integrally machined, and the material is ICD-5. The main machining includes 3D surface, guide plate mounting surface, cover plate limiting guide surface, reset spring (flanging die reset pressure source) mounting thread, etc.

[0026] The present invention provides a mold structure for negative angle flanging, in which the trolley assembly mainly consists of a trolley body, a drive body, and related components, and is key to converting the vertical pressure of the machine tool into the punching direction pressure. The trolley body is preferably made of FCD550 material. The sliding direction of the flanging die is controlled by NC machining of the installation angle of the wedge plate, realizing the conversion of the vertical pressure of the machine tool into the punching direction force. Here, the slider only reciprocates relative to the lower die holder in the X-axis direction. The movement trend of the flanging die is controlled by the sliding stroke of the wedge plate, realizing the retraction and reset of the negative angle feature surface of the product. Attached Figure Description

[0027] Figure 1 This is a 3D drawing of the sheet metal parts for car door and window frames.

[0028] Figure 2 for Figure 1 A schematic diagram of the stamping direction of sheet metal parts for automobile door and window frames.

[0029] Figure 3 This is a schematic diagram of the upper negative angle flange of a car door and window frame sheet metal part before it is flipped.

[0030] Figure 4 for Figure 3 A schematic diagram showing the completed flanging of the upper negative angle of the sheet metal part of the car door and window frame.

[0031] Figure 5 For the three-dimensional mold structure used for negative angle flanging Figure 1 .

[0032] Figure 6 For the three-dimensional mold structure used for negative angle flanging Figure 2 .

[0033] Figure 7 This is a schematic diagram of the upper punch in a mold structure used for negative angle flanging.

[0034] Figure 8This is a schematic diagram of the lower die structure used for negative angle flanging.

[0035] Figure 9 Side flanging mechanism structure for mold structure used for negative angle flanging Figure 1 .

[0036] Figure 10 Side flanging mechanism structure for mold structure used for negative angle flanging Figure 2 .

[0037] Figure 11 This is a schematic diagram of the negative angle interaction mechanism structure for a mold structure used for negative angle flanging.

[0038] Figure 12 This is a schematic diagram of the flange concave mold component in the negative angle interactive mechanism structure.

[0039] Figure 13 This is a schematic diagram of the trolley component in the negative angle interactive mechanism structure.

[0040] Figure 14 This is a three-dimensional view of the flanging punch in the side flanging mechanism.

[0041] Figure 15 This is a magnified view of a portion of the flanging punch in the side flanging mechanism.

[0042] Figure 16 A schematic diagram of the limiting screw structure for the upper mold base.

[0043] Figure 17 A schematic diagram of the mounting hole for the limiting screw of the upper mold base.

[0044] Figure 18 The diagram shows the structure of the rear flanging mechanism and the negative angle interaction mechanism, omitting the upper mold base structure.

[0045] Figure 19 for Figure 18 The diagram is shown with part of the side flange mechanism omitted.

[0046] Figure 20 for Figure 19 The diagram after omitting the upper mold base is omitted.

[0047] Figure 21 This is a three-dimensional view of the main body of the trolley.

[0048] Figure 22 This is a schematic diagram of the main body of the trolley after omitting the lower mold base.

[0049] Figure 23 This is a schematic diagram of a side guide block for a drive block that is located on the side of the drive block and cooperates with a side limit block.

[0050] Figure 24 For flanging die 3D Figure 1.

[0051] Figure 25 This is a magnified view of a portion of the flanging die.

[0052] Figure 26 For flanging die 3D Figure 2 .

[0053] Figure 27 This is a magnified view of the side protrusions of the flanging die.

[0054] Figure 28 This is a three-dimensional view of the wedge-shaped panel.

[0055] Figure 29 This is a schematic diagram of the interaction mechanism at a negative angle.

[0056] Figure 30 This is a magnified view of the upper slider assembly position of the upper mold base.

[0057] Figure 31 This is a partial bottom view of the slide retraction pressure source and the upper slide mounting position on the upper mold base.

[0058] Figure 32 Three-dimensional carrier for gun Figure 1 .

[0059] Figure 33 Three-dimensional carrier for gun Figure 2 .

[0060] Figure 34 Three-dimensional carrier for gun Figure 3 .

[0061] Figure 35 This is a magnified view of a portion of the stroke groove of the flange punch on the upper die holder.

[0062] Figure 36 for Figure 35 A top view of the movement hole position of the columnar body of the flanging punch set in the stroke groove of the middle flanging punch.

[0063] Figure 37 for Figure 35 A bottom view of the movement hole of the columnar body of the flanging punch set in the stroke groove of the middle flanging punch.

[0064] Figure 38 This is a partial enlarged view of the stop block fixing seat of the upper mold base and the stop block installed on the stop block fixing seat.

[0065] Figure 39 A diagram showing the effect of the stop block set for the upper mold base and the buffer block of the gun-shaped carrier working together.

[0066] Figure 40 The diagram shows the effect of the Z-shaped elevated step structure of the gun-shaped carrier combined with the gun-shaped carrier.

[0067] Figure 41 This is a schematic diagram of the slider distribution in the groove of the passive guide.

[0068] Figure 42 This is a perspective view of the drive block installed on the lower mold base.

[0069] Figure 43 This is a side view of the flange die holder.

[0070] Figure 44 Three-dimensional flange die fixing base Figure 1 .

[0071] Figure 45 Three-dimensional flange die fixing base Figure 2 .

[0072] Figure 46 This is a partially enlarged view of the flange die holder installed on the lower die holder.

[0073] Figure 47 A perspective view of the drive wedge insert device at the drive assembly.

[0074] Figure 48 A schematic diagram of the U-shaped drive assembly protective seat for the lower mold base.

[0075] Figure 49 This is a schematic diagram showing the fit between the trolley body and the trolley cover.

[0076] Figure 50 This is a schematic diagram showing the interaction between the flanging punch and the flanging die. Detailed Implementation

[0077] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific embodiments.

[0078] Figure 1 The automotive door window frame sheet metal part P in this invention comprises two finished parts simultaneously processed using this invention. The automotive door window frame sheet metal part P has a first window frame side P1 forming the upper frame, a second window frame side P2 forming the lower frame, and a third window frame side P3 forming the rear frame. The third window frame side P3 connects to the first window frame side P1 and the second window frame side P2. Since the first window frame side P1 is a gradually decreasing curved component with a decreasing distance from the second window frame side P2, a connecting plate P4 is provided at the other converging end of the first window frame side P1 and the second window frame side P2. It should be noted that there is a negative angle flange M at the adjacent position of the first window frame side P1 and the third window frame side (see...). Figure 4 ),exist Figure 3 The image shows the state of the negative angle flange before it was flipped. Figure 2 It can be seen that the stamping direction T of the two car door and window frame sheet metal parts P is completed. After the negative angle flanging action is completed, the car door and window frame sheet metal part P needs to be removed from the mold. However, because the flanging action is negative, it will be "stuck" in the lower mold and cannot be removed. Therefore, traditional structural designs cannot meet the processing needs of such parts, hence the mold structure of this invention.

[0079] Figure 5 , Figure 6 This is a perspective view of a mold structure for negative angle flanging. The mold structure for negative angle flanging includes an upper mold part 1, which is installed on an upper press and moves up and down synchronously with the upper press, and a lower mold part 2, which is installed on a lower press and cooperates with the upper mold part. The upper mold part 1 is provided with an upper forming stamping unit for the car door and window frame sheet metal parts, and the lower mold part 2 is provided with a lower forming stamping unit for the car door and window frame sheet metal parts. The shapes of the upper punch 100-1 of the upper forming stamping unit and the lower die 200-1 of the lower forming stamping unit are matched with the car door and window frame sheet metal parts. Figure 5 A coordinate reference system for the X, Y, and Z axes is given. The left-right direction of the mold is the X-axis (i.e., the direction of the long side of the mold is the X-axis), the front-back direction of the mold is the Y-axis (i.e., the direction of the short side of the mold is the Y-axis), and the height direction of the mold is the Z-axis.

[0080] In this embodiment, the upper and lower mold parts use two cavities (the cavities are composed of an upper punch and a lower die) to simultaneously process two automotive door and window frame sheet metal parts P. Therefore, it is necessary to complete the operation of two negative angle flanges M at the same time. The following is combined with Figure 5-50 A detailed explanation of the structure for completing the negative angle flange M is provided.

[0081] Figure 7 A schematic diagram of the upper punch in a mold structure used for negative angle flanging; Figure 8 This is a schematic diagram of the lower die for a mold structure used for negative angle flanging. Normally, after the negative angle flanging M is formed, it is an integral part of the entire door / window frame sheet metal part. The negative angle flanging M can easily get stuck in the mold structure used for flanging, preventing the product from being easily removed from the mold. During the mold closing process of the upper punch 100-1 and the lower die 200-1, the door / window frame sheet metal part can be formed simultaneously. More importantly, it can also complete the negative angle flanging action, allowing the molds used for performing the negative angle flanging to separate and enabling the door / window frame sheet metal part to be properly removed from the mold. This prevents the problem of the negative angle flanging M getting stuck and preventing the part from being removed from the mold.

[0082] See Figure 11 The upper mold section is equipped with a side-flanged structure 3, and the lower mold section is equipped with a negative angle interaction mechanism 4 (see the action process). Figure 29 , Figure 29 State T1 is the mold opening process, and state T2 is the mold closing process. Due to the negative angle feature of the product (i.e., negative angle flange M), the flange angle differs from the Z-axis angle by 25° (i.e., the punching angle is 65°). The side flange structure 3 can realize the punching work of the negative angle feature after the negative angle interaction mechanism is in place. The upper mold part 1 has an upper mold base 100, and the lower mold part 2 has a lower mold base 200. The lower mold base 200 is installed on the lower press and does not move during the production process. It is used to support the installation of all components of the lower mold, etc. The upper mold base has a first upper lifting lug 100a at the corner of its front and right edges, a second upper lifting lug 100b at the corner of its front and right edges, a third upper lifting lug 100c at the corner of its rear and left edges, and a fourth upper lifting lug 100d at the corner of its rear and right edges. These four lifting lugs facilitate the lifting of the upper mold base. Each of the four lifting lugs has a pin hole for inserting lifting pins. The lifting lugs work in conjunction with the lifting rings of the crane to complete the lifting operation of the upper mold base. Similarly, the lower mold base has a first lower lifting lug 200a at the corner of its front and left edges, a second lower lifting lug 200b at the corner of its front and right edges, a third lower lifting lug 200c at the corner of its rear and left edges, and a fourth lower lifting lug 200d at the corner of its rear and right edges. The four lower lifting lugs have lifting pin holes. When lifting the lower mold base, the lifting pin is inserted into the pin hole and used in conjunction with the lifting ring to carry out the lifting operation.

[0083] See Figure 9 The side-flanging mechanism 3 includes an upper slide block 301 mounted on the upper slide block mounting position of the upper mold base 100. The upper slide block is provided with a flanging punch 300. The upper slide block includes a gun-shaped carrier. The flanging punch 300 is mounted on the V-shaped insert structure of the gun-shaped carrier 301-1. During the downward pressing of the upper mold base, the gun-shaped carrier moves towards... Figure 9 As the die moves to the right, the flanging punch enters the die cavity to perform the flanging action. During the upward movement of the upper die holder, the nitrogen spring... Figure 9 The left side pushes the gun-shaped carrier, causing the flanging punch to disengage from the die. The gun-shaped carrier 301-1 includes a handle portion 301-1a and a body portion 301-1b. The body portion 301-1b is provided with a limiting screw 301-1e located at the limiting screw hole 301-1e′ provided on the upper die base. The limiting screw has the effect of suspending the gun-shaped carrier and can only move back and forth within the limiting screw hole with a stroke of only 20mm. A side limiting block 301-1c with a hook is provided on the side of the handle portion 301-1a. The side limiting block is obliquely distributed, and one end of the side limiting block 301-1c is fixed to the side of the handle portion by a screw. Figure 23It can be seen that the drive block is equipped with a drive block side guide block 301-1c′ that cooperates with the side limiting block. This ensures that the gun handle of the gun-shaped carrier does not detach during the oblique sliding along the drive block, while simultaneously cooperating with the side limiting block 301-1c to reset. The belly of the gun handle has a working boss 301-1d with an inclined surface. The flanging punch 300 has a flanging punch seat head 300a obliquely arranged on the gun-shaped carrier. A square block 300b is provided at one corner of the flanging punch seat head 300a, and a columnar body 300c extends vertically from the square block. A Z-shaped forming surface structure 300d is provided at the front end of the columnar body. (See [reference]). Figure 50 The diagram illustrates the interaction between the flanging punch and die. The die is hollow, and the Z-shaped punch ensures that the raised portion of the flanging surface contacts the die first, allowing the punch to counteract lateral forces during flanging. Note that... (See also...) Figures 35-37 The upper mold base is provided with a flanging punch travel groove 100-3, and the flanging punch travel groove is provided with obliquely arranged flanging columnar body movement holes 100-3a.

[0084] It is worth mentioning that during the downward movement of the gun-shaped carrier along with the upper mold base, the Z-shaped forming surface structure 300d can be moved into the corresponding flanging die assembly 400 on the lower mold base by utilizing the sliding engagement of the gun handle with the drive block. After the flanging action is completed, the gun-shaped carrier needs to move upward with the upper mold base. At this time, the following structure is required for resetting: the gun-shaped carrier mounted on the flanging punch 301 is equipped with a slider return pressure source 302. This slider return pressure source 302 includes, but is not limited to, a nitrogen spring. The nitrogen spring cylinder seat and the telescopic part are integrated and are a standard part, and the entire standard part is fixed on the gun-shaped carrier (of course, this standard part can also be fixed on the upper mold base in principle, but due to structural space limitations, the optimal structure must be placed on the gun-shaped carrier). During the resetting process of the gun-shaped carrier by the nitrogen spring, a buffer block can be used to buffer the action. The lower die base 200 is provided with a drive block 304 that mates with the handle portion of the gun-shaped carrier. The drive block 304 is mounted on the lower die base and its main function is to control the upper slider and the flanging punch to flanging along the negative angle characteristic normal (a guide plate is mounted on the drive block for guiding). The drive block 304 is fixed to the drive block assembly seat of the lower die base by screws. The drive block 304 has an inclined working surface 304-1, and the bottom of the inclined working surface 304-1 has a stop structure. A sliding drive guide plate 305 is mounted on the inclined working surface of the drive block 304 by screws. This drive guide plate is located between the inclined working surface of the drive block and the handle portion. The upper die base is provided with an anti-fall-off guide mechanism 306 to guide the upper slider and prevent it from detaching. In this embodiment, the anti-fall-off guide mechanism 306 is composed of multiple upper slider cover plates, which are locked on the upper die base and mainly serve to guide the slider during movement and prevent it from falling off. Figure 40A diagram showing the effect of the upper slider cover plate and the gun-shaped carrier being used together is provided. The upper slider cover plate is fixed to the upper mold base with screws, and the gun-shaped carrier is supported by the upper surface of the upper slider cover plate to achieve the reciprocating stroke.

[0085] See Figure 19 The negative angle interaction mechanism 4 includes a flanging die assembly 400 disposed on the lower die base, a trolley assembly 401 disposed on the lower side of the flanging die assembly, and a drive assembly 402. The drive assembly includes a drive wedge insert device 402a mounted on the upper die base, and the drive wedge insert device is provided with an anti-side guide plate 401e. See also Figure 12 as well as Figure 20 The flanging die assembly 400 includes a flanging die holder 400a and a flanging die 400b disposed on the flanging die holder 400a. See [link to previous section] Figure 24-25 The flanging die 400b has a flanging die working cavity 400b-1. At the four corners of the working cavity 400b-1 are circular outward-expanding ears 400b-2. These four circular outward-expanding ears are tooling clearances designed to facilitate machining during NC (Non-CNC) machining. An inner worktable 400b-3 is provided within the working cavity 400b-1. This inner worktable mates with the Z-shaped forming surface of the punch to complete the negative angle flanging. Flanging is performed on one side, while the other side counteracts lateral forces. The top of the inner worktable has a rounded chamfer and an upper inclined surface 400b-3a, and a lower vertical surface 400b-3b located below the upper inclined surface. The two sides of the flanging die 400b are provided with side-protruding ribs 400b-4. At the bottom of the flanging die is a wedge-shaped insert positioning groove 400b-5. (See [reference]). Figure 27 The side protruding ribs 400b-4, in conjunction with the wedge cover plate 400e, allow the flanging punch to perform lifting and lowering actions within the oblique motion space of the flanging die fixed seat (the wedge plate 400f at the bottom of the flanging die is lifted by the trolley assembly, thereby lifting the flanging die; after the upper die seat rises and the external force disappears, the trolley assembly is reset downward by the return spring 400d).

[0086] See Figure 20 One of the arms of the flanging die fixing seat 400a is equipped with a reset pressure block 400c. A reset spring 400d is installed between the reset pressure block 400c and the flanging die. After the external force is removed, the reset spring 400d presses down to reset the flanging die downwards. The two cantilever end faces of the flanging die fixing seat 400a are equipped with inclined wedge cover plates 400e for limiting the flanging die. The inclined wedge cover plates are mainly made of copper alloy and graphite. The inclined wedge cover plates 400e mainly serve two functions: a. guiding the sliding fit in the processing direction; b. disassembling and limiting the flanging die. The inclined wedge cover plates 400e can be fixed with screws. The inclined wedge cover plates 400e can limit the flanging die within the inclined movement space of the flanging die fixing seat 400a, allowing it to move up and down. Figure 27As can be seen, a sliding guide plate assembly for the flanging die is provided within the oblique motion space of the flanging die fixing seat 400a. A wedge plate 400f is provided at the bottom of the flanging die, located at the wedge plate positioning groove 400b-5. The wedge plate 400f can be fixed to the wedge plate positioning groove 400b-5 at the bottom of the flanging die with screws. (See also...) Figure 28 The wedge plate 400f has a lifting ramp 400f-1, which can lift the flanging die upward under the lifting action of the transverse trapezoidal guide block 401b-2 of the trolley assembly.

[0087] See Figure 21-22 The trolley assembly 401 includes a trolley guide plate 401a disposed on the lower mold base and a trolley body 401b disposed on the sliding guide plate. The sliding body is provided with a return spring 401c, and a spring stop block 401d cooperating with the return spring is provided on the lower mold base. The U-shaped drive assembly protective seat 200-3 of the lower mold base is provided with an anti-side boss 200-3b cooperating with the anti-side guide plate 401e. The anti-side boss 200-3b has a lower mold anti-side side facing the anti-side guide plate. The anti-side bosses 200-3b are centrally and vertically distributed on the working side 200-3a of the U-shaped drive assembly protective seat facing the trolley assembly. The upper mold base is provided with a drive wedge insert device 402a cooperating with the trolley body, and the drive wedge insert device is provided with the anti-side guide plate 401e. (Continue to see...) Figure 21 The trolley body 401b is L-shaped. A passive wedge plate 401b-1 with a guide ramp is installed at the step position of the vertical trolley arm of the trolley body. A transverse trapezoidal guide block 401b-2 with a guide ramp is provided on the transverse trolley seat of the trolley body. When the transverse trapezoidal guide block cuts into the wedge plate 400f at the bottom of the flanging die through the ramp, the upper surface of the transverse trapezoidal guide block abuts against the lower surface of the wedge plate 400f (see the state at this time). Figure 13 As shown in the diagram, at this point, the flanging die completes its upward ejection action, and the flanging punch enters the flanging die, thus completing the flanging process. Afterwards, a reverse motion completes their respective resets, allowing the upper and lower die holders to separate, and the part can be easily removed from the mold. The sidewall of the trolley body is equipped with trolley side wings 400b-3, which facilitate sliding with the trolley cover plate and provide a limiting effect. The trolley cover plate and guide plate restrict the trolley to reciprocating motion only in the X-axis direction (a buffer polyurethane and spring-loaded blocks are designed in the X-axis direction to limit the trolley's travel in the X-axis).

[0088] In this embodiment, since two parts complete the side flanging, there are also two side flanging mechanisms 3. The upper slider 301 of the upper mold base 100 is distributed along the length of the mold. It reciprocates with the upper mold base relative to the X-axis, and the stroke of the upper slider 301 is 20mm. The upper slider is provided with a flanging punch 300, see [reference]. Figure 14 As shown in the figure, the flanging punch 300 of the side flanging mechanism is mounted on the gun-shaped carrier 301-1. The gun-shaped carrier 301-1 includes a gun handle part 301-1a and a gun body part 301-1b. A side limiting block 301-1c with a hook part is provided on the side of the gun handle part 301-1a. A working boss 301-1d with a bevel is provided on the belly of the gun handle part. The flanging punch 300 has a flanging punch seat head 300a arranged obliquely. A square block 300b is provided at one corner of the flanging punch seat head 300a. A columnar body 300c extends vertically from the square block, such as a square column. A Z-shaped forming surface structure 300d is provided at the front end of the columnar body. The corner of the Z-shaped forming surface structure adopts an arc chamfer.

[0089] See also Figure 9 The sliding block retraction pressure source 302 provided on the flanging punch 300 can be a nitrogen spring. This nitrogen spring is located at the tail end of the gun-shaped carrier 301-1. The upper die holder has clearance space at the head end of the gun-shaped carrier 301-1 to facilitate the nitrogen spring driving the gun-shaped carrier, thereby allowing the flanging punch 300 on the gun-shaped carrier to cooperate with the flanging die assembly 400. Figure 9 This is the instant the side flanging is completed; the next movement of the punch will begin the reset process.

[0090] The drive block 304 provided on the lower mold base 200 is fixed to the lower mold base by screws. The drive block 304 is provided with an inclined working surface, and the inclined working surface of the drive block 304 is provided with a slidingly fitted drive guide plate 305.

[0091] The negative angle interaction mechanism 4 includes a flanging die assembly 400 disposed on the lower die base, a trolley assembly 401 disposed on the lower side of the flanging die assembly, and a drive assembly 402. The upper drive body containing the drive assembly 402 is mounted on the upper die base and moves up and down reciprocally in the vertical direction with the upper die base during the mold closing process, providing driving force to the trolley. The preferred material is HT300 or FCD550.

[0092] The flanging die assembly 400 includes a flanging die holder 400a and a flanging die 400b disposed on the flanging die holder 400a. One of the arm supports of the flanging die holder 400a is provided with a reset pressure block 400c (see [link]). Figure 20The reset pressure block is mainly used in mold closing to compress the nitrogen spring to provide pressure for resetting the flanging die and to limit the position of the flanging die. A reset spring 400d is provided between the reset pressure block 400c and the flanging die. The two cantilever end faces of the flanging die fixing seat 400a are provided with inclined wedge cover plates 400e to limit the position of the flanging die. An inclined wedge insert 400f is provided at the bottom of the flanging die. The main function of the inclined wedge insert 400f is to transmit the pressure of the trolley to the flanging die during the stamping process, control the stroke of the flanging die, and change the direction of the stamping pressure. Due to the compact structure space, commonly used standard parts cannot meet the requirements, so the part specifications are: 70*70*35 (copper plus graphite, unit mm).

[0093] The trolley assembly 401 includes a trolley guide plate 401a disposed on the lower mold base, a trolley body 401b disposed on the sliding guide plate, a spring stop 401c disposed at one end of the sliding guide plate, and a spring stop 401d disposed on the lower mold base that cooperates with the return spring. The U-shaped drive assembly protective seat of the lower mold base is provided with a lower mold anti-side surface, which can be formed by the surface of the anti-side boss 200-3b. The lower mold base is provided with a trolley body cover plate 401h for limiting the movement of the trolley body. Figure 42 The lower mold base is provided with a trolley component assembly position, which includes a trolley component assembly slot 200-2. On both sides of the trolley component assembly slot are trolley main body cover plate mounting seats 200-2a, which are arranged at different heights. Figure 49 As can be seen, the side wings of the trolley assembly are not at the same horizontal height, therefore the trolley main body cover plate mounting seat is adapted to it. A trolley main body side slider 200-2b is provided in the trolley assembly assembly slot, and a trolley main body bottom slider 200-2c is added in the trolley assembly assembly slot.

[0094] As a reciprocating motion mechanism, the mounting position of the upper slider is crucial. In this embodiment, the upper slider assembly position of the upper mold base is not only used to install the upper slider, but also needs to accommodate the assembly and positioning of the limit screw. Figure 30 This is a bottom view of the upper slider mounting position. The upper mold base is provided with an upper slider mounting position 100-2. The upper slider mounting position 100-2 includes a passive guide upper groove body 100-2a. The groove end of the passive guide upper groove body is provided with a stepped cylinder assembly seat 100-2b, combined with... Figure 31The cylinder mounting base can be used to install the slider retraction pressure source 302. Since a nitrogen spring is selected in this embodiment, the stepped cylinder mounting base can be used to fix the nitrogen spring with screws. The nitrogen spring can drive the upper slider to achieve a reset action at the upper slider mounting position. The passive guide upper groove body is provided with a first upper slider cover plate mounting base 100-2c and a second upper slider cover plate mounting base 100-2d distributed along the movement direction of the upper slider. Figure 30 It can be seen that the first upper slider cover plate assembly seat 100-2c and the second upper slider cover plate assembly seat 100-2d are distributed on both sides (length direction) of the passive guide upper groove body. Upper slider cover plate fixing screw holes are provided on the surfaces of the first upper slider cover plate assembly seat 100-2c and the second upper slider cover plate assembly seat 100-2d, which facilitates fixing the upper slider cover plate to the corresponding slider cover plate assembly seat using screws, etc., thereby restricting the sliding of the first and second side wings of the upper slider within the passive guide upper groove body. The top of the passive guide upper groove body is provided with a gun body front lifting platform slider mounting seat 100-2e and a gun body rear lifting platform slider mounting seat 100-2f. The side of the first upper slider cover plate assembly seat 100-2c is provided with a protruding first gun body side slider mounting seat 100-2g, and the side of the second upper slider cover plate assembly seat 100-2d is provided with a protruding second gun body side slider mounting seat 100-2h. Combined with... Figure 41 The passive guide groove 100-2a is equipped with a multi-directional upper slider guidance system 307 that cooperates with the upper slider. The multi-directional upper slider guidance system 307 includes multiple upper slider guide plates. The upper slider guide plates provide guidance during the reciprocating motion of the slider and reduce the resistance encountered by the slider during the motion, ensuring smooth reciprocating motion of the upper slider. A square first upper slider guide plate 307a is horizontally mounted on the front upper platform slider mounting seat 100-2e of the gun body by screws. A square second upper slider guide plate 307b is horizontally mounted on the rear upper platform slider mounting seat 100-2f of the gun body by screws. The first upper slider guide plate 307a and the second upper slider guide plate 307b slide in cooperation with the rear upper platform 301-1b3 and the front upper platform 301-1b4 of the gun body to achieve a horizontal sliding guidance effect. The first gun body side slider mounting seat 100-2g has two first upper slider side guide plates 307d vertically mounted with screws, and the second gun body side slider mounting seat 100-2h has two second upper slider side guide plates 307c vertically mounted with screws. This multi-segment upper slider side guide plate achieves the lateral sliding guidance effect of the upper slider.

[0095] See Figures 32-34The upper surface of the gun body 301-1b of the gun-type carrier 301-1 is provided with a buffer block 303 for sliding upper blocks. The buffer block 303 is an integral structure with the gun-type carrier. The buffer block 303 has a trapezoidal recoil body 303a, which is distributed along the width direction of the gun body. An L-shaped front recoil body 303b is provided on the front side of the trapezoidal recoil body facing the gun body. The width of the L-shaped front recoil body 303b is the same as the width of the upper bottom surface of the system-like recoil body (the upper bottom surface dimension of the trapezoidal recoil body is smaller than the lower bottom surface dimension), thereby allowing the two waists of the system-like recoil body to be exposed without colliding head-on with the stop block. See also Figure 38 The passive guide groove 100-2a of the upper mold base is equipped with a stop block 303' that mates with the buffer block, which is installed in the U-shaped stop block fixing seat 303'-1. The width of the stop block 303' is smaller than the width of the L-shaped front seat 303b. Figure 39 As can be seen, when the gun-shaped carrier returns to its rightward position, the left end face of the stop block 303', which is fixed to the upper mold base by bolts, can directly block the buffer block. This not only buffers the upper slider but, more importantly, limits the stroke of the upper slider, preventing damage to the mold due to excessive travel during the upper slider's return. Here, the buffer block 303 utilizes its L-shaped front seat 303b to buffer the impact with the stop block, achieving the effect of front buffering and rear strong support.

[0096] See also Figures 32-34 The two sides of the gun body 301-1b are respectively provided with a rectangular strip-shaped first side wing 301-1b1 and a second side wing 301-1b2. The length of the first side wing 301-1b1 is less than that of the second side wing 301-1b2, and a Z-shaped elevated step structure 301-1b5 is provided at the bottom of the first side wing and the second side wing. This Z-shaped elevated step structure is... Figure 40 As can be seen, the first and second side wings can only contact the upper slider cover plate through the Z-shaped overhead step structure, without the upper slider cover plate contacting other parts of the side of the gun-shaped carrier. This design minimizes the contact area between the two, reduces friction during the sliding process, and improves the reliability and stability of the upper slider operation.

[0097] The rear of the gun body is provided with an upward-lifting rear platform 301-1b3, and the front of the gun body is provided with an upward-lifting front platform 301-1b4. This dual-platform lifting structure is conducive to sliding with the guide plate while avoiding problems such as internal structural interference.

[0098] See Figures 43-46 The flanging die holder 400a includes a horizontally arranged rear holder tail 400a-2, which has multiple screw holes for easy assembly using screws. Figure 46As can be seen, the flanging die fixing seat 400a is mounted on the support seat of the lower die seat by screws. The rear fixing seat is equipped with an arm seat 400a-4, the width of which is approximately the same as the tail of the rear fixing seat to ensure overall structural strength. The arm seat 400a-4 suspends two upward-curving, inclined arm seats 400a-3. The maintenance space between the arm seat 400a-4 and the two arm seats 400a-3 is the flanging die inclined movement space 400a-5. This inclined arm seat structure can adapt to the characteristics of the flanging structure and cooperate with the flanging punch to enter the die to complete the flanging action. The side walls of the two arm seats facing the flanging die inclined movement space are equipped with flanging die side slider mounting seats 400a-6, and the side walls of the arm seat facing the flanging die inclined movement space are equipped with flanging die back slider mounting seats 400a-7. (See [reference]). Figure 27 The lateral slider mounting seat 400a-6 of the flanging die is fixed with a lateral sliding guide plate 400a-6′ of the flanging die by screws, while the rear slider mounting seat 400a-7 of the flanging die is fixed with a rear sliding guide plate 400a-7′ of the flanging die. A D-shaped channel structure 400a-1 is formed at the corner of the two arm seats and the arm seat body. This D-shaped channel structure can both prevent sliding interference during the movement of the flanging die and allow for sliding installation of the flanging die. Since the two wedge cover plates 400e mounted on the arm seats are cantilevered, the wedge cover plates 400e partially press against the side protruding ribs 400b-4 of the flanging die. This effectively confines the flanging die within its oblique movement space, and the corresponding mechanisms at the bottom cooperate to complete the lifting or retraction / lowering actions.

[0099] See Figure 47 The trolley assembly drives the flanging die assembly to rise or fall (i.e., rise or fall to reset). The drive wedge insert device is the driving structure of the trolley assembly. Specifically, the drive wedge insert device 402a includes a drive component fixing seat 402a-1 fixed to the upper die base and a columnar drive column 402a-2 vertically installed on the drive component fixing seat. The drive component fixing seat 402a-1 is provided with screw holes for assembly, while the columnar drive column 402a-2 is generally a square column structure. It can move smoothly up and down under the drive of the upper mold base. The side of the columnar drive column 402a-2 is provided with a stepped drive wedge mounting part. The stepped drive wedge mounting part is detachably mounted with a drive wedge plate 402a-3. The lower part of the drive wedge plate 402a-3 is a drive inclined surface, while the upper part of the drive inclined surface of the drive wedge plate 402a-3 can allow the trolley body to move forward to the maximum movement position (i.e., when it abuts against the passive wedge plate provided on the trolley body). Figure 13 (Move to the right to the maximum travel position). It is worth mentioning that the edge of the trolley assembly mounting position is provided with a buffer mechanism 401f that cooperates with the columnar drive column, such as a buffer polyurethane (polyurethane buffer).

[0100] The working principle of this invention is as follows: During the mold closing process, the upper press begins to descend. Figure 48 Side guide plate 401e in the columnar drive column 402-a assembly ( Figure 47 As shown, the anti-side guide plate 401e (installed on the columnar drive column 402-a) first contacts the lower mold anti-side surface, thus counteracting the lateral force of the drive block. When the distance from the bottom dead center is 135mm (unless otherwise specified in this article, the bottom dead center refers to the extreme termination position of the downward movement of the columnar drive column 402a-2), Figure 48 The driving wedge plate 402a-3 on the right side of the columnar drive column 402a-2 contacts the passive wedge plate 401b-1 of the trolley assembly, and the trolley begins to move forward. When it is 128.4mm from the bottom dead center, the flanging die begins to move. When it is 83.3mm from the bottom dead center, the flanging die is in place. The columnar drive column 402a-2 continues to press down with the upper die, pushing the trolley forward. When it is 40mm from the bottom dead center, the pressure plate contacts the lower die surface and stops moving during the downward movement of the upper press, while the nitrogen spring of the pressure plate is in a continuously compressed state. At the same time, when it is 42.89mm from the bottom dead center, the side-tilting mechanism begins to move. As the press moves downward, when it is 12.5mm from the bottom dead center, the side-tilting cutter block (i.e., Figure 14 The flanging punch 300 begins flanging from the Z-shaped working surface at its lower end. The flanging is completed at the bottom dead center. Then, the upper press moves upward, driving the wedge plate 402a-3 to gradually detach from the trolley assembly along with the columnar drive column 402a-2. The wedge components enter the retraction process, and the flanging punch also retracts along the flanging direction and detaches from the product. The upper die pressure plate rises, releasing the pressure action. The flanging die moves in the opposite direction along the flanging, detaching from the negative angle area of ​​the product. After all the components of the lower die are reset, the robotic arm enters the press to grab the part (i.e., the sheet metal part of the car door and window frame) and sends it to the conveyor belt, thus completing one punching process.

[0101] The negative angle stamping mechanism described above is mainly used in flanging products where negative angles exist and affect normal production. Its main feature is that the negative angle interaction mechanism needs to be in place first during the mold closing process, and then the side flanging mechanism performs the stamping work. After the mold opens, the side flanging mechanism (in this case, the main part is in the upper mold) retracts first, and the negative angle interaction mechanism (in this case, the main part is in the lower mold) moves then.

[0102] In the design of the self-made wedge, the starting point of the component movement and the stroke relationship are mainly controlled according to the needs of the product and production, so as to solve the problems encountered in the mold and enable the mold to complete the punching work with special features. The corresponding processing requirements for the main body are also relatively high. If the processing accuracy cannot be guaranteed, it will greatly affect the assembly, fitting and debugging process. Other components are made using standard parts such as coiled wedges, MISUMI, and Sankyo (in the case of space constraints, the specifications of standard parts can also be customized to meet the feasibility of the overall wedge design and the functional requirements of the stamping action).

[0103] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A mold structure for negative angle flanging, comprising: The upper die part is installed on the upper press and moves up and down and reciprocates synchronously with the upper press. The upper die part is provided with a stamping unit for forming sheet metal parts of car door and window frames. The lower die part is installed on the lower press and cooperates with the upper die part, and the lower die part is provided with a lower forming stamping unit for the sheet metal parts of the car door and window frame. The upper mold portion is characterized by having a side flange structure, and the lower mold portion is characterized by having a negative angle interaction mechanism; The side-flanging structure includes an upper slider disposed on an upper mold base, the upper slider being provided with a flanging punch, the upper slider including a gun-shaped carrier, the flanging punch being installed at a V-shaped insert structure of the gun-shaped carrier, the gun-shaped carrier including a gun handle and a gun body, the gun body being provided with a limiting screw located at a limiting screw hole provided on the upper mold base, the side of the gun handle being provided with a side limiting block with a hook, the driving block being provided with a driving block side guide block that cooperates with the side limiting block, the belly of the gun handle having a working boss with a bevel, the flanging punch having a flanging punch seat head obliquely arranged on the gun-shaped carrier, a square block being provided at one corner of the flanging punch seat head, the square block extending vertically into a columnar body, the front end of the columnar body being provided with a Z-shaped forming surface structure, the upper mold base being provided with a flanging punch stroke groove, and the flanging punch stroke groove being provided with obliquely arranged flanging punch columnar body movement holes; The flanging punch is equipped with a gun-shaped carrier and a slider return pressure source. The lower die base is equipped with a drive block that cooperates with the gun handle of the gun-shaped carrier. The drive block is equipped with an inclined working surface and a sliding drive guide plate. The upper die base is equipped with an anti-drop guide mechanism to guide the upper slider and prevent the upper slider from falling off. The negative angle interaction mechanism includes a flanging die assembly disposed on the lower die base, a trolley assembly disposed on the lower side of the flanging die assembly, and a drive assembly; the drive assembly includes a drive wedge insert device mounted on the upper die base, the drive wedge insert device being provided with an anti-side guide plate; the flanging die assembly includes a flanging die fixing seat and a flanging die disposed on the flanging die fixing seat; one of the seat arms of the flanging die fixing seat is provided with a reset pressure block, and a reset spring is provided between the reset pressure block and the flanging die; the flanging die assembly includes a flanging die fixing seat and a flanging die disposed on the lower die base. The two cantilever end faces of the edge die fixing seat are provided with inclined wedge cover plates to limit the flanging die, and the bottom of the flanging die is provided with an inclined wedge insert; the trolley assembly includes a trolley guide plate provided on the lower die seat and a trolley body provided on the sliding guide plate, the trolley body is provided with a return spring and a spring stop block that cooperates with the return spring is provided on the lower die seat, the U-shaped drive assembly protective seat of the lower die seat is provided with an anti-side boss that cooperates with the anti-side guide plate, and the lower die seat is provided with a trolley body cover plate to limit the trolley body.

2. The mold structure for negative angle flanging according to claim 1, characterized in that, The trolley body is L-shaped. A passive wedge plate with a guide slope is installed at the step position of the vertical trolley arm of the trolley body. A horizontal trapezoidal guide block with a guide slope is provided on the horizontal trolley seat of the trolley body. Trolley side wings are provided on the side wall of the trolley body.

3. The mold structure for negative angle flanging according to claim 1, characterized in that, The upper mold base is provided with an upper slider mounting position, which includes a passive guide upper groove body. The groove end of the passive guide upper groove body is provided with a stepped cylinder assembly seat. The passive guide upper groove body is provided with a first upper slider cover plate assembly seat and a second upper slider cover plate assembly seat distributed along the movement direction of the upper slider. The top of the passive guide upper groove body is provided with a gun body front lifting platform slider mounting seat and a gun body rear lifting platform slider mounting seat. The side of the first upper slider cover plate assembly seat is provided with a protruding first gun body side slider mounting seat, and the side of the second upper slider cover plate assembly seat is provided with a protruding second gun body side slider mounting seat. The passive guide groove is equipped with a multi-directional guide system for the upper slider that cooperates with the upper slider.

4. The mold structure for negative angle flanging according to claim 1, characterized in that, The upper surface of the gun body of the gun carrier is provided with a buffer block with an upper slider. The buffer block has a trapezoidal rear body, and the trapezoidal rear body is provided with an L-shaped front body facing the front side of the gun body. The upper mold base has a passive guide groove in which a stop block that cooperates with the buffer block is installed through a U-shaped stop block fixing seat.

5. The mold structure for negative angle flanging according to claim 4, characterized in that, The two sides of the gun body are respectively provided with a square elongated first side wing and a second side wing; The rear of the gun body is provided with an upward-lifting rear platform, and the front of the gun body is provided with an upward-lifting front platform. Z-shaped elevated step structures are located at the bottom of the first and second side wings.

6. The mold structure for negative angle flanging according to claim 1, characterized in that, The flanging die fixing seat includes a horizontally arranged rear fixing seat tail. The rear fixing seat is provided with an arm seat body. The arm seat body is suspended with two upward-curving and inclined seat arms. The maintenance space of the arm seat body and the two seat arms is the oblique movement space of the flanging die. The two arm seats are provided with a side slider mounting seat for the flanging die facing the oblique action space of the flanging die, and the arm seat body is provided with a back slider mounting seat for the flanging die facing the oblique action space of the flanging die. The two armrests and the corner of the armrest body form a D-shaped channel structure.

7. The mold structure for negative angle flanging according to claim 1, characterized in that, The driving wedge mounting device includes a driving component fixing seat fixed to the upper mold base and a columnar driving column vertically installed on the driving component fixing seat. The side of the columnar driving column is provided with a stepped driving wedge mounting part, and a driving wedge plate is detachably installed on the stepped driving wedge mounting part. The edge of the trolley assembly mounting position is provided with a buffer mechanism that cooperates with the columnar drive column.

Images