CN111842660A - Forming die combination and forming process of double-camber bumper - Google Patents
Forming die combination and forming process of double-camber bumper Download PDFInfo
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- CN111842660A CN111842660A CN202010641419.0A CN202010641419A CN111842660A CN 111842660 A CN111842660 A CN 111842660A CN 202010641419 A CN202010641419 A CN 202010641419A CN 111842660 A CN111842660 A CN 111842660A
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- bumper
- radian
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- blank
- shaping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/22—Auxiliary equipment, e.g. positioning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a forming die combination and a forming process of a double-radian bumper, which are suitable for a bumper which is a hollow part with openings at two ends and is internally provided with a reinforcing rib which is parallel to the thickness direction and extends along the length direction, wherein the forming die combination of the double-radian bumper comprises a primary bending die, a secondary bending die, a rib cutting and punching die and a shaping die.
Description
Technical Field
The invention belongs to the technical field of punch forming, and particularly relates to a forming die assembly and a forming process of a double-radian bumper.
Background
The bumper of the automobile is a main safety component which can protect passengers and a vehicle body when the automobile collides, and the structural design of the bumper not only needs to consider the safety performance, but also needs to consider the structures of other parts around the bumper and the overall appearance design of the automobile. Various automobile bumpers on the market at present are designed to be of a bent structure for matching the shapes of a cabin cover and a front skin, but generally have only one arc, namely, are bent in one direction. In order to better adapt to the design of the front appearance of an automobile, a double-camber bumper is provided at present, the double-camber bumper is bent in two mutually perpendicular directions, the structure is complex, the forming difficulty is high, and therefore a forming process capable of processing the double-camber bumper in batches is urgently needed.
The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a forming die combination and a forming process of a double-radian bumper, which can realize the bending of the secondary radian of the bumper, and have the advantages of few die repairing times, strong product consistency, high product quality, simple operation, high processing efficiency, suitability for mass production of the double-radian bumper and strong practicability.
In order to achieve the above object, in one aspect, the present invention provides a molding die assembly for a double-arc bumper, which is adapted to a bumper having a hollow member with two open ends and having a reinforcing rib inside, the reinforcing rib extending in a length direction and being parallel to a thickness direction, the molding die assembly comprising: the primary bending die comprises a primary female die forming block, a supporting chain and a primary male die forming block, the primary female die forming block is used for placing the bumper, the supporting chain can extend into the bumper from an end opening of the bumper, and the primary male die forming block can be matched with the primary female die forming block to press and extrude the bumper so as to bend the bumper to form a primary radian; the secondary bending die comprises clamping devices, a secondary male die forming block and a material supporting block, the two clamping devices are used for respectively clamping two end parts of the bumper along the length direction, the male die forming block can extrude the upper side of the middle part of the bumper, the clamping devices can rotate around a horizontal axis perpendicular to the length direction of the bumper, and the material supporting block can support the lower side of the bumper so as to bend the bumper to form a secondary radian; the rib cutting and punching die comprises a supporting seat, a supporting core plate, a rib cutting knife and a punching knife head, wherein the supporting seat is used for supporting the end part of the bumper, the supporting core plate and the rib cutting knife can extend into the bumper from an opening at the end part of the bumper and are respectively positioned at the upper side and the lower side of the reinforcing rib, and the rib cutting knife and the punching knife head can synchronously move in a translation mode along the direction vertical to the reinforcing rib so as to cut the reinforcing rib at the end part of the bumper and punch a hole on the upper side face of the bumper parallel to the reinforcing rib; and the shaping mold comprises a shaping female mold forming block, a fixed shaping block, a movable shaping block and a shaping male mold forming block, the shaping female mold forming block is used for placing the bumper, the fixed shaping block can be abutted against the end inward-bent side face of the bumper, the movable shaping block can slide to be close to the shaping female mold forming block so as to match with the inner and outer bent side faces of the bumper, and meanwhile, the shaping male mold forming block can be in pressing extrusion shaping with the shaping female mold forming block to press the upper side face and the lower side face of the bumper.
In one example, the supporting chain of the primary bending die comprises a plurality of movable supporting blocks which are sequentially connected along the length direction of the supporting chain, when the primary male die forming block and the primary female die forming block extrude the bumper, the plurality of movable supporting blocks of the supporting chain extending into the bumper can relatively rotate under external extrusion, and are linearly arranged in a gap between the primary female die forming block and the primary male die forming block so as to support the interior of a bending section of the bumper.
In one example, the clamping device of the secondary bending stamping die comprises a secondary supporting block, the external dimension of the secondary supporting block is matched with the end inner cavity of the bumper, the secondary supporting block can extend into or withdraw from the end opening of the bumper, and the secondary supporting block can support the inner cavity at the end opening of the bumper.
In one example, a supporting groove for placing the bumper is arranged at the top of the supporting seat of the cut rib punching die, the end opening of the bumper is positioned at the end of the supporting groove, and one side face of the bumper parallel to the reinforcing rib faces upwards; and the supporting grooves can respectively support two end parts of the bumper, so that the reinforcing ribs at the two end parts of the bumper can be respectively cut off by the rib cutting and punching die, and two ends of the upper side surface of the bumper, which is parallel to the reinforcing ribs, can be respectively punched.
In one example, the shaping mold further comprises a support member having a cross-sectional shape and size adapted to the shape and size of the end opening of the bumper, the support member being capable of being inserted into or withdrawn from the end opening of the bumper and supporting the inner side wall pressing against the end opening of the bumper to shape the end cavity of the bumper.
On the other hand, the invention also provides a molding process of the double-camber bumper, which adopts the molding die combination of the double-camber bumper as described in any one of the above examples, and comprises the following steps: primary bending: bending the bumper blank along a direction perpendicular to a reinforcing rib of the bumper blank by using a primary bending die to form a primary radian, so as to obtain a single-radian bumper blank; secondary bending: bending the single-radian bumper blank along the direction, perpendicular to the length direction and parallel to the reinforcing ribs, of the single-radian bumper blank by using a secondary bending die to form a secondary radian, so as to obtain a double-radian bumper blank; rib cutting and punching: cutting the reinforcing ribs in the openings at the two ends of the double-radian bumper blank by using a rib cutting and punching die, and simultaneously punching two ends of the upper side surface of the double-radian bumper blank parallel to the reinforcing ribs to obtain a semi-finished product of the double-radian bumper; stamping and shaping: and (3) extruding and shaping the semi-finished product of the double-radian bumper in the primary bending direction and the secondary bending direction of the semi-finished product of the double-radian bumper by using a shaping die to obtain a finished product of the double-radian bumper.
In one example, the one-time bending specifically comprises the following steps: placing the bumper blank on the primary female die forming block of the primary bending die, enabling one side, parallel to the reinforcing ribs, of the bumper blank to face upwards, and enabling an opening at the end of the bumper blank to be positioned at the end of the primary female die forming block; feeding the support chain into the interior of the bumper blank from an end opening of the bumper blank; the primary male die forming block presses the primary female die forming block downwards to extrude the bumper blank to be parallel to two opposite sides of the reinforcing rib in a matched mode, so that the bumper blank is bent in a direction perpendicular to the reinforcing rib of the bumper blank to form a primary radian, and the single-radian bumper blank is obtained; the primary male die forming block moves upwards to be far away from the primary female die forming block, and the supporting chain is pulled away from the inner cavity of the single-radian bumper blank, so that the single-radian bumper blank is released.
In one example, the secondary bending specifically comprises the following steps of respectively clamping and supporting two end parts of the single-radian bumper blank along the length direction by using two clamping devices of the secondary bending die, and enabling one side of the single-radian bumper blank, which is perpendicular to the reinforcing rib, to face upwards; the secondary male die forming block downwards extrudes the upper side of the middle part of the single-radian bumper blank, meanwhile, the clamping device rotates around a horizontal axis perpendicular to the length direction of the single-radian bumper blank to bend two ends of the single-radian bumper blank, and the material supporting block supports the lower side of the single-radian bumper blank so as to bend the single-radian bumper blank along the direction, perpendicular to the length direction of the single-radian bumper blank and parallel to the reinforcing ribs, to form a secondary radian, so that a double-radian bumper blank is obtained; the secondary male die forming block goes upwards and is far away from the material supporting block, and the clamping mechanism loosens the end part of the double-radian bumper blank so as to release the double-radian bumper blank.
In one example, the bar cutting and punching specifically comprises the following steps: one end of the double-radian bumper blank is supported and placed on the supporting seat of the rib cutting and punching die and sleeved on the supporting core plate and the peripheries of the rib cutting knives, one side of the double-radian bumper blank parallel to the reinforcing ribs faces upwards, and the supporting core plate and the rib cutting knives are respectively positioned on the upper side and the lower side of the reinforcing ribs; the rib cutting knife and the punching tool bit synchronously move in a translational motion along a direction vertical to the reinforcing ribs, the rib cutting knife cuts off the reinforcing ribs in the openings at the ends of the double-radian bumper blanks, and the punching tool bit punches holes at the ends of the upper side faces, parallel to the reinforcing ribs, of the double-radian bumper blanks; the punching tool bit moves upwards to be far away from the supporting seat so as to release the double-radian bumper blank; taking down the double-radian bumper blank, supporting the other end of the double-radian bumper blank on the supporting seat, sleeving the supporting core plate and the periphery of the rib cutter, enabling one side of the double-radian bumper blank parallel to the reinforcing rib to face upwards, and enabling the supporting core plate and the rib cutter to be respectively positioned at the upper side and the lower side of the reinforcing rib; the rib cutting knife and the punching knife head synchronously move in a translational motion along a direction vertical to the reinforcing ribs, the rib cutting knife cuts the reinforcing ribs in the openings at the ends of the double-radian bumper blanks, and the punching knife head punches holes at the ends of the upper side surfaces, parallel to the reinforcing ribs, of the double-radian bumper blanks to obtain semi-finished products of the double-radian bumper; the punching tool bit moves upwards to be far away from the supporting seat so as to release the semi-finished product of the double-radian bumper.
In one example, the press-shaping specifically includes the following steps; placing the semi-finished product of the double-radian bumper on the shaping female die forming block, enabling one side, parallel to the reinforcing rib, of the semi-finished product of the double-radian bumper to face upwards, positioning an opening at the end part of the semi-finished product of the double-radian bumper at the end part of the shaping female die forming block, and enabling the end part of the inner bent side surface of the semi-finished product of the double-radian bumper to abut against the fixed shaping block; the shaping male die forming block presses the shaping female die forming block downwards to match with extrusion and shape the upper side and the lower side of the semi-finished product of the double-radian bumper, and meanwhile, the movable shaping block slides to be close to the shaping female die forming block to match with extrusion and shape the inner and outer curved sides of the semi-finished product of the double-radian bumper to obtain a finished product of the double-radian bumper; the shaping male die forming block ascends to be far away from the shaping female die forming block, and the movable shaping block slides to be far away from the shaping female die forming block, so that the finished double-radian bumper is released.
The forming die combination and the forming process of the double-radian bumper provided by the invention can bring the following beneficial effects:
1. the forming die combination of the double-radian bumper is divided into four independent dies, the four independent dies can be separately and independently operated to independently process different procedures to form flow line production, the number of the independent dies can be flexibly adjusted according to different processing efficiencies of the different procedures, and the flexibility is strong; the bending of bumper secondary radian can be realized through the forming die combination of double-radian bumper, the machine-shaping of double-radian bumper is accomplished, and it is few to repair the mould number of times moreover, and product stability and uniformity are strong, and the product quality is high, easy operation, and machining efficiency is high, is applicable to the mass production of double-radian bumper, and the practicality is strong.
2. The supporting chain can be arranged linearly in the space between the female die forming block and the male die forming block, the supporting chain supports the inside of the bending part when the bumper is stressed to bend, the bending part is even and avoids collapsing, the inside of the bumper is effectively supported in the bending process, the bumper is effectively prevented from being collapsed and deformed, the production operation is simple, the bending effect is good, the forming quality is high, the product quality is improved, the rejection rate and the production cost are reduced, the production efficiency is high, and the practicability is high.
3. The secondary supporting block can avoid the collapse deformation of the end part of the bumper under external force in the bending and forming process, and meanwhile, the clamping device is more compact in clamping the end part of the bumper and easy to bend, so that the consistency of products is improved, the defective rate of the products is reduced, the quality of the products is improved, the production cost is reduced, and the practicability is high.
4. The supporting groove supports the lower side surface of the bumper, so that the influence of gravity on the clamping of the end part of the bumper can be reduced, the processing effect is ensured, the product quality is ensured, meanwhile, the deformation of the clamped part of the bumper relative to other parts is avoided, the product quality is ensured, the placement of the bumper in the processing process is facilitated, and the processing efficiency is improved; the both sides that support the groove simultaneously respectively with the both ends adaptation of bumper for bar cutting cut-out press can be applicable to the bar cutting at bumper both ends and punch a hole, realizes that a mould accomplishes the bumper both ends bar cutting and the twice process that punches a hole, saves mould quantity, reduces mould and human cost, improves economic benefits, and the practicality is strong.
5. Support piece can support the opening at bumper both ends, effectively avoids bumper tip opening to collapse and warp, and support piece can exert pressure to bumper tip inner wall simultaneously to the tip of outside extrusion plastic bumper promotes the plastic effect, improves the product uniformity, reduces the defective percentage, guarantees product quality, and the practicality is strong.
6. The forming process of the double-radian bumper can complete the machining forming of the double-radian bumper, the process is reasonable in design, simple in operation, few in steps and easy to realize, mutual influence between the front and the back of each process is fully considered, the product quality and the production efficiency are guaranteed, the number of dies is saved, the production cost is reduced, the economic benefit is improved, and the practicability is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic perspective view of a primary bending mold according to the present invention;
FIG. 2 is a schematic perspective view of a support chain in the single-stage bending mold according to the present invention;
FIG. 3 is a schematic perspective view of a secondary bending mold according to the present invention;
FIG. 4 is a schematic perspective view of a clamping device in a secondary bending mold according to the present invention
FIG. 5 is a schematic perspective view of the cutting and punching mold of the present invention;
FIG. 6 is a schematic diagram showing the partial structural matching of the shearing and punching die of the present invention
FIG. 7 is a schematic perspective view of a support seat of the present invention;
FIG. 8 is a schematic perspective view of a reforming mold according to the present invention;
FIG. 9 is a schematic perspective view of a movable shaping block in the shaping mold according to the present invention;
FIG. 10 is a perspective view of a support member of the reforming mold of the present invention;
fig. 11 is a flow chart of a molding shape of a double-arc bumper in a molding process of the double-arc bumper according to the present invention.
Detailed Description
In order to more clearly explain the overall concept of the invention, the following detailed description is given by way of example in conjunction with the accompanying drawings. In the description of the present invention, it is to be understood that the terms "central," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings for ease of description and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description of the present specification, reference to the description of the terms "one aspect," "some aspects," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same solution or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.
As shown in fig. 1 to 10, the embodiment of the present invention provides a forming die assembly for a double-curvature bumper, which is suitable for a bumper 200 which is a hollow member with two open ends and has reinforcing ribs inside, the reinforcing ribs extending parallel to the thickness direction and along the length direction, and the bumper 200 includes a primary bending die 110, a secondary bending die 120, a rib cutting and punching die 130 and a shaping die 140; the primary bending die 110 comprises a primary female die forming block 111, a support chain 112 and a primary male die forming block 113, the primary female die forming block 111 is used for placing the bumper 200, the support chain 112 can extend into the bumper 200 from an end opening of the bumper 200, and the primary male die forming block 113 can be matched with the primary female die forming block 111 to press and extrude the bumper 200 so as to bend the bumper 200 to form a primary radian; the secondary bending die 120 comprises a clamping device 121, a secondary male die forming block 122 and a material supporting block 123, wherein the two clamping devices 121 are used for respectively clamping two end parts of the bumper 200 along the length direction, the secondary male die forming block 122 can press the upper side of the middle part of the bumper 200, the clamping device 121 can rotate around a horizontal axis perpendicular to the length direction of the bumper 200, and the material supporting block 123 can support the lower side of the bumper 200 so as to bend the bumper 200 to form a secondary radian; the rib cutting and punching die 130 comprises a supporting seat 131, a supporting core plate 132, a rib cutting knife 133 and a punching tool bit 134, wherein the supporting seat 131 is used for supporting the end part of the bumper 200, the supporting core plate 132 and the rib cutting knife 133 can extend into the bumper 200 from the opening at the end part of the bumper 200 and are respectively positioned at the upper side and the lower side of the reinforcing rib, and the rib cutting knife 133 and the punching tool bit 134 can synchronously move in a translation mode along the direction vertical to the reinforcing rib so as to cut off the reinforcing rib at the end part of the bumper 200 and punch a hole on the upper side face, parallel to the reinforcing rib, of the; the shaping mold 140 comprises a shaping female mold forming block 141, a fixed shaping block 142, a movable shaping block 143 and a shaping male mold forming block 144, the shaping female mold forming block 141 is used for placing the bumper 200, the fixed shaping block 142 can be abutted by the inward-bent side face of the end part of the bumper 200, the movable shaping block 143 can slide close to the shaping female mold forming block 141 to match the inward-outward-bent side face of the extrusion shaping bumper 200, and meanwhile, the shaping male mold forming block 144 can press the upper side face and the lower side face of the extrusion shaping bumper 200 together with the shaping female mold forming block 141.
The forming die combination of the double-radian bumper is divided into four independent dies, the four independent dies can be separately and independently operated to independently process different procedures to form flow line production, the number of the independent dies can be flexibly adjusted according to different processing efficiencies of the different procedures, and the flexibility is strong; the bending of bumper secondary radian can be realized through the forming die combination of double-radian bumper, the machine-shaping of double-radian bumper is accomplished, and it is few to repair the mould number of times moreover, and product stability and uniformity are strong, and the product quality is high, easy operation, and machining efficiency is high, is applicable to the mass production of double-radian bumper, and the practicality is strong.
Specifically, the support chain 112 of the primary bending die 110 includes a plurality of movable support blocks 1121 sequentially connected along the length direction of the support chain 112, and when the primary male die forming block 113 and the primary female die forming block 111 extrude the bumper 200, the plurality of movable support blocks 1121 of the support chain 112 extending into the bumper 200 can relatively rotate under external extrusion, and are linearly arranged in a gap between the primary female die forming block 111 and the primary male die forming block 113 to support the inside of the bending section of the bumper 200. Support chain 112 can be at a time the cavity between die shaping piece 111 and a terrace die shaping piece 113 linear arrangement in the space, there is support chain 112 in the inside of bending part when bumper 200 atress is crooked and crooked even and avoid collapsing, thereby effectively support the inside of bumper 200 at the in-process of buckling, effectively prevent that bumper 200 from being collapsed and being out of shape, production easy operation, it is crooked effectual, the shaping quality is high, improve product quality, reduce rejection rate and manufacturing cost, high production efficiency, therefore, the clothes hanger is strong in practicability.
Specifically, the clamping device 121 of the secondary bending stamping die 120 includes a secondary support block 1211, the external dimension of the secondary support block 1211 is adapted to the end inner cavity of the bumper 200, the secondary support block 1211 can extend into or extend out of the end opening of the bumper 200, and the secondary support block 1211 can support the inner cavity of the end opening of the bumper 200. The secondary support block 1211 can prevent the end portion of the bumper 200 from collapsing and deforming under external force in the bending and forming process, and meanwhile, the clamping device 121 can clamp the end portion of the bumper 200 more tightly and is easy to bend, so that the consistency of products is improved, the defective rate of the products is reduced, the quality of the products is improved, the production cost is reduced, and the practicability is high.
Specifically, the top of the support seat 131 of the cut rib punching die 130 is provided with a support groove 1311 for placing the bumper 200, the end opening of the bumper 200 is positioned at the end of the support groove 1311, and the bumper 200 is made to face upward parallel to one side of the reinforcing ribs; and the supporting grooves 1311 can support both end portions of the bumper 200, respectively, so that the cut rib-punching die 130 can cut off the reinforcing ribs at both end portions of the bumper 200, respectively, and punch holes at both ends of the upper side of the bumper 200 parallel to the reinforcing ribs, respectively. The supporting groove 1311 supports the lower side surface of the bumper 200, so that the influence of gravity on clamping of the end portion of the bumper 200 can be reduced, the processing effect is guaranteed, the product quality is guaranteed, meanwhile, deformation of the clamped portion of the bumper 200 relative to other portions is avoided, the product quality is guaranteed, the bumper 200 can be conveniently placed in the processing process, and the processing efficiency is improved; support the both sides of groove 1311 simultaneously respectively with the both ends adaptation of bumper 200 for bar cutting cut-out press 130 can be applicable to the bar cutting and punching a hole at bumper 200 both ends, realizes that a mould accomplishes the twice process of bar cutting and punching a hole at bumper 200 both ends, saves mould quantity, reduces mould and human cost, improves economic benefits, and the practicality is strong.
Specifically, the shaping mold 140 further includes a support member 145, the support member 145 having a cross-sectional shape and size adapted to the end opening shape and size of the bumper 200, the support member 145 being capable of extending into or out of the end opening of the bumper 200 and supporting the inner sidewall of the end opening of the bumper 200 to shape the end cavity of the bumper 200. Support piece 145 can support the opening at bumper 200 both ends, effectively avoids bumper 200 tip opening to collapse and warp, and support piece 145 can exert pressure to bumper 200 tip inner wall simultaneously to outside extrusion plastic bumper 200's tip promotes the plastic effect, improves the product uniformity, reduces the defective percentage, guarantees product quality, and the practicality is strong.
As shown in fig. 1 to 11, by using the molding die assembly for a double-curvature bumper provided in any of the above embodiments, another embodiment of the present invention further provides a molding process for a double-curvature bumper, including the following steps:
primary bending: the bumper blank 201 is bent in a direction perpendicular to the reinforcing ribs of the bumper blank 201 using the primary bending die 110 to form a primary arc, resulting in a single arc bumper blank 202.
Wherein, once bending specifically includes the following step:
Placing a bumper blank 201 on a primary female die forming block 111 of a primary bending die 110, enabling one side, parallel to the reinforcing ribs, of the bumper blank 201 to face upwards, and enabling an opening at the end part of the bumper blank 201 to be positioned at the end part of the primary female die forming block 111;
feeding the support chain 112 into the bumper blank 201 from the end opening of the bumper blank 201;
the primary male die forming block 113 presses the primary female die forming block 111 downwards to extrude the bumper blank 201 to be parallel to the two opposite sides of the reinforcing rib in a matched mode, so that the bumper blank 201 is bent in a direction perpendicular to the reinforcing rib of the bumper blank 201 to form a primary radian, and a single-radian bumper blank 202 is obtained;
the primary male die forming block 113 moves upwards to be away from the primary female die forming block 111, and the support chain 112 is pulled away from the inner cavity of the single-radian bumper blank 202, so that the single-radian bumper blank 202 is released.
Secondary bending: the single arc bumper blank 202 is bent in a direction perpendicular to the length direction of the single arc bumper blank 202 and parallel to the reinforcing ribs using the secondary bending die 120 to form a secondary arc, resulting in a double arc bumper blank 203.
Wherein, secondary bending specifically includes the following steps:
respectively clamping and supporting two end parts of the single-radian bumper blank 202 along the length direction by using two clamping devices 121 of the secondary bending die 120, so that one side of the single-radian bumper blank 202, which is vertical to the reinforcing ribs, faces upwards;
The secondary male die forming block 122 downwards extrudes the upper side of the middle part of the single-radian bumper blank 202, meanwhile, the clamping device 121 rotates around a horizontal axis perpendicular to the length direction of the single-radian bumper blank 202 to bend two ends of the single-radian bumper blank 202, and the material supporting block 123 supports the lower side of the single-radian bumper blank 202 so as to bend the single-radian bumper blank 202 along the direction, perpendicular to the length direction and parallel to the reinforcing ribs, of the single-radian bumper blank 202 to form a secondary radian, so that a double-radian bumper blank 203 is obtained;
the secondary punch-forming block 122 moves up away from the carrier block 123 and the clamping mechanism 121 releases the end of the double arc bumper blank 203, thereby releasing the double arc bumper blank 203.
And (3) rib cutting and punching, namely cutting off the reinforcing ribs in the openings at the two ends of the double-radian bumper blank 203 by using a rib cutting and punching die 130, and simultaneously punching holes at the two ends of the upper side surface, parallel to the reinforcing ribs, of the double-radian bumper blank 203 to obtain a semi-finished product 204 of the double-radian bumper.
The rib cutting and punching method specifically comprises the following steps: one end of a double-radian bumper blank 203 is supported and placed on a supporting seat 131 of the rib cutting and punching die 130 and sleeved on the peripheries of a supporting core plate 132 and a rib cutting knife 133, one side of the double-radian bumper blank 203, which is parallel to the reinforcing ribs, faces upwards, and the supporting core plate 132 and the rib cutting knife 133 are respectively positioned at the upper side and the lower side of the reinforcing ribs;
The rib cutting knife 133 and the punching tool head 134 synchronously move in a translational motion along the direction vertical to the reinforcing ribs, the rib cutting knife 133 cuts the reinforcing ribs in the openings at the end parts of the double-radian bumper blanks 203, and the punching tool head 134 punches holes at the end parts of the upper sides of the double-radian bumper blanks 203, which are parallel to the reinforcing ribs;
the punch head 134 moves up away from the support seat 131 to release the double arc bumper blank 203;
taking down the double-radian bumper blank 203, supporting the other end of the double-radian bumper blank 203 on the supporting seat 131, sleeving the supporting core plate 132 and the periphery of the bar cutter 133, wherein one side of the double-radian bumper blank 203, which is parallel to the reinforcing ribs, faces upwards, and the supporting core plate 132 and the bar cutter 133 are respectively positioned at the upper side and the lower side of the reinforcing ribs;
the rib cutting knife 133 and the punching tool bit 134 synchronously move in a translational motion along a direction vertical to the reinforcing ribs, the rib cutting knife 133 cuts the reinforcing ribs in the openings at the end parts of the double-radian bumper blanks 203, and the punching tool bit 134 punches holes at the end parts of the upper sides, parallel to the reinforcing ribs, of the double-radian bumper blanks 203 to obtain double-radian bumper semi-finished products 204;
the punch head 134 moves up away from the support seat 131 to release the double arc bumper blank 204.
Stamping and shaping: and (3) using the shaping die 140 to simultaneously extrude and shape the double-radian semi-finished bumper product 204 in the primary bending direction and the secondary bending direction of the double-radian semi-finished bumper product 204 to obtain a double-radian finished bumper product 205.
The stamping and shaping method specifically comprises the following steps: placing the semi-finished product 204 of the double-radian bumper on the shaping concave die forming block 141, enabling one side of the semi-finished product 204 of the double-radian bumper parallel to the reinforcing rib to face upwards, positioning an opening at the end part of the semi-finished product 204 of the double-radian bumper at the end part of the shaping concave die forming block 141, and enabling the end part of the inward-bent side surface of the semi-finished product 204 of the double-radian bumper to abut against the fixed shaping block 142;
the shaping male die forming 144 blocks go downwards to press the shaping female die forming block 141 to match with the upper and lower side faces of the semi-finished product 204 of the extruded and shaped double-radian bumper, and meanwhile, the movable shaping block 143 slides to be close to the shaping female die forming block 141 to match with the inner and outer curved side faces of the semi-finished product of the extruded and shaped double-radian bumper 204 to obtain a finished product 205 of the double-radian bumper;
the shaping male die forming block 144 ascends away from the shaping female die forming block 141, and the movable shaping block 143 slides away from the shaping female die forming block 141, so that the double-radian finished bumper 205 is released.
The forming process of the double-radian bumper 200 can be completed, the process is reasonable in design, simple in operation, few in steps and easy to realize, mutual influence between the front and the back of each process is fully considered, product quality and production efficiency are guaranteed, the number of dies is saved, production cost is reduced, economic benefits are improved, and practicability is high.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a forming die combination of double arc degree bumper, is applicable to and is both ends open-ended hollow member and inside have the bumper that is on a parallel with thickness direction and follows the strengthening rib of length direction extension, a serial communication port, forming die combination includes:
the primary bending die comprises a primary female die forming block, a supporting chain and a primary male die forming block, the primary female die forming block is used for placing the bumper, the supporting chain can extend into the bumper from an end opening of the bumper, and the primary male die forming block can be matched with the primary female die forming block to press and extrude the bumper so as to bend the bumper to form a primary radian;
The secondary bending die comprises clamping devices, a secondary male die forming block and a material supporting block, the two clamping devices are used for respectively clamping two end parts of the bumper along the length direction, the secondary male die forming block can extrude the upper side of the middle part of the bumper, the clamping devices can rotate around a horizontal axis perpendicular to the length direction of the bumper, and the material supporting block can support the lower side of the bumper so as to bend the bumper to form a secondary radian;
the rib cutting and punching die comprises a supporting seat, a supporting core plate, a rib cutting knife and a punching knife head, wherein the supporting seat is used for supporting the end part of the bumper, the supporting core plate and the rib cutting knife can extend into the bumper from an opening at the end part of the bumper and are respectively positioned at the upper side and the lower side of the reinforcing rib, and the rib cutting knife and the punching knife head can synchronously move in a translation mode along the direction vertical to the reinforcing rib so as to cut the reinforcing rib at the end part of the bumper and punch a hole on the upper side face of the bumper parallel to the reinforcing rib; and
the shaping die comprises a shaping female die forming block, a fixed shaping block, a movable shaping block and a shaping male die forming block, wherein the shaping female die forming block is used for placing the bumper, the fixed shaping block can be abutted against the end inward-bent side face of the bumper, the movable shaping block can slide to be close to the shaping female die forming block to match with the inner and outer bent side faces of the bumper, and meanwhile, the shaping male die forming block can be in pressing extrusion shaping with the shaping female die forming block to press the upper side face and the lower side face of the bumper.
2. The combination of claim 1, wherein the supporting chain of the primary bending die comprises a plurality of movable supporting blocks sequentially connected along the length direction of the supporting chain, and when the primary male die forming block and the primary female die forming block extrude the bumper, the plurality of movable supporting blocks of the supporting chain extending into the bumper can relatively rotate under external extrusion, and are linearly arranged in a gap between the primary female die forming block and the primary male die forming block to support the inside of the bending section of the bumper.
3. The mold assembly of claim 1, wherein the holding device of the secondary bending and stamping mold comprises a secondary support block, the outer dimension of the secondary support block is adapted to the end cavity of the bumper, the secondary support block can extend into or extend out of the end opening of the bumper, and the secondary support block can support the cavity at the end opening of the bumper.
4. The combination of claim 1, wherein a supporting groove for placing the bumper is formed at the top of the supporting seat of the cut rib punching die, and the end opening of the bumper is positioned at the end of the supporting groove, so that the bumper faces upward parallel to one side of the reinforcing rib; and the supporting grooves can respectively support two end parts of the bumper, so that the reinforcing ribs at the two end parts of the bumper can be respectively cut off by the rib cutting and punching die, and two ends of the upper side surface of the bumper, which is parallel to the reinforcing ribs, can be respectively punched.
5. The mold assembly of claim 1, further comprising a support member having a cross-sectional shape and size adapted to the shape and size of the end opening of the bumper, the support member being capable of being inserted into or withdrawn from the end opening of the bumper and supporting against the inner side wall of the end opening of the bumper to shape the end cavity of the bumper.
6. A process for molding a double-arc bumper using the mold assembly of any one of claims 1 to 5, comprising the steps of:
primary bending: bending the bumper blank along a direction perpendicular to a reinforcing rib of the bumper blank by using a primary bending die to form a primary radian, so as to obtain a single-radian bumper blank;
secondary bending: bending the single-radian bumper blank along the direction, perpendicular to the length direction and parallel to the reinforcing ribs, of the single-radian bumper blank by using a secondary bending die to form a secondary radian, so as to obtain a double-radian bumper blank;
rib cutting and punching: cutting the reinforcing ribs in the openings at the two ends of the double-radian bumper blank by using a rib cutting and punching die, and simultaneously punching two ends of the upper side surface of the double-radian bumper blank parallel to the reinforcing ribs to obtain a semi-finished product of the double-radian bumper;
Stamping and shaping: and (3) extruding and shaping the semi-finished product of the double-radian bumper in the primary bending direction and the secondary bending direction of the semi-finished product of the double-radian bumper by using a shaping die to obtain a finished product of the double-radian bumper.
7. The molding process of a double-curvature bumper according to claim 6, wherein the one-time bending specifically comprises the following steps:
placing the bumper blank on the primary female die forming block of the primary bending die, enabling one side, parallel to the reinforcing ribs, of the bumper blank to face upwards, and enabling an opening at the end of the bumper blank to be positioned at the end of the primary female die forming block;
feeding the support chain into the interior of the bumper blank from an end opening of the bumper blank;
the primary male die forming block presses the primary female die forming block downwards to extrude the bumper blank to be parallel to two opposite sides of the reinforcing rib in a matched mode, so that the bumper blank is bent in a direction perpendicular to the reinforcing rib of the bumper blank to form a primary radian, and the single-radian bumper blank is obtained;
the primary male die forming block moves upwards to be far away from the primary female die forming block, and the supporting chain is pulled away from the inner cavity of the single-radian bumper blank, so that the single-radian bumper blank is released.
8. The molding process of a double-curvature bumper according to claim 6, wherein the secondary bending comprises the following steps:
respectively clamping and supporting two end parts of the single-radian bumper blank along the length direction by using two clamping devices of the secondary bending die, and enabling one side of the single-radian bumper blank, which is vertical to the reinforcing rib, to be upward;
the secondary male die forming block downwards extrudes the upper side of the middle part of the single-radian bumper blank, meanwhile, the clamping device rotates around a horizontal axis perpendicular to the length direction of the single-radian bumper blank to bend two ends of the single-radian bumper blank, and the material supporting block supports the lower side of the single-radian bumper blank so as to bend the single-radian bumper blank along the direction, perpendicular to the length direction of the single-radian bumper blank and parallel to the reinforcing ribs, to form a secondary radian, so that a double-radian bumper blank is obtained;
the secondary male die forming block goes upwards and is far away from the material supporting block, and the clamping mechanism loosens the end part of the double-radian bumper blank so as to release the double-radian bumper blank.
9. The molding process of a double-curvature bumper according to claim 6, wherein the rib cutting and punching specifically comprises the following steps:
One end of the double-radian bumper blank is supported and placed on the supporting seat of the rib cutting and punching die and sleeved on the supporting core plate and the peripheries of the rib cutting knives, one side of the double-radian bumper blank parallel to the reinforcing ribs faces upwards, and the supporting core plate and the rib cutting knives are respectively positioned on the upper side and the lower side of the reinforcing ribs;
the rib cutting knife and the punching tool bit synchronously move in a translational motion along a direction vertical to the reinforcing ribs, the rib cutting knife cuts off the reinforcing ribs in the openings at the ends of the double-radian bumper blanks, and the punching tool bit punches holes at the ends of the upper side faces, parallel to the reinforcing ribs, of the double-radian bumper blanks;
the punching tool bit moves upwards to be far away from the supporting seat so as to release the double-radian bumper blank;
taking down the double-radian bumper blank, supporting the other end of the double-radian bumper blank on the supporting seat, sleeving the supporting core plate and the periphery of the rib cutter, enabling one side of the double-radian bumper blank parallel to the reinforcing rib to face upwards, and enabling the supporting core plate and the rib cutter to be respectively positioned at the upper side and the lower side of the reinforcing rib;
The rib cutting knife and the punching knife head synchronously move in a translational motion along a direction vertical to the reinforcing ribs, the rib cutting knife cuts the reinforcing ribs in the openings at the ends of the double-radian bumper blanks, and the punching knife head punches holes at the ends of the upper side surfaces, parallel to the reinforcing ribs, of the double-radian bumper blanks to obtain semi-finished products of the double-radian bumper;
the punching tool bit moves upwards to be far away from the supporting seat so as to release the semi-finished product of the double-radian bumper.
10. The process for forming a double-curvature bumper according to claim 6, wherein the stamping and shaping specifically comprises the following steps;
placing the semi-finished product of the double-radian bumper on the shaping female die forming block, enabling one side, parallel to the reinforcing rib, of the semi-finished product of the double-radian bumper to face upwards, positioning an opening at the end part of the semi-finished product of the double-radian bumper at the end part of the shaping female die forming block, and enabling the end part of the inner bent side surface of the semi-finished product of the double-radian bumper to abut against the fixed shaping block;
the shaping male die forming block presses the shaping female die forming block downwards to match with extrusion and shape the upper side and the lower side of the semi-finished product of the double-radian bumper, and meanwhile, the movable shaping block slides to be close to the shaping female die forming block to match with extrusion and shape the inner and outer curved sides of the semi-finished product of the double-radian bumper to obtain a finished product of the double-radian bumper;
The shaping male die forming block ascends to be far away from the shaping female die forming block, and the movable shaping block slides to be far away from the shaping female die forming block, so that the finished double-radian bumper is released.
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| CN111842660B (en) | 2022-06-07 |
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