CN112517750B - Female die for local secondary forming of section steel - Google Patents
Female die for local secondary forming of section steel Download PDFInfo
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- CN112517750B CN112517750B CN202011345656.9A CN202011345656A CN112517750B CN 112517750 B CN112517750 B CN 112517750B CN 202011345656 A CN202011345656 A CN 202011345656A CN 112517750 B CN112517750 B CN 112517750B
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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
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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
- B21D37/08—Dies with different parts for several steps in a process
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- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention belongs to the technical field of section bar support production and processing, and particularly relates to a female die for local secondary molding of section bar, which comprises a first working surface and a second working surface, wherein the first working surface and the second working surface form relative pin joint fit, the first working surface and the second working surface swing relatively to switch between a first station and a second station, the first working surface and the second working surface are coplanar in the first station state, and the first working surface and the second working surface form a V-shaped groove with an included angle in the second station state. The female die can be switched between two states of a plane and a groove, and can sequentially realize flattening and inward turning of the bottom angle of the C-shaped steel when being matched with the male die, so that automatic forming of the C-shaped steel sink is realized.
Description
Technical Field
The invention belongs to the technical field of production and processing of profile brackets, and particularly relates to a female die for local secondary molding of profile steel.
Background
The invention relates to a C-shaped steel which is widely applied to a plurality of fields of construction, industrial and agricultural productions and the like, and is mainly used as a framework of construction facilities or industrial equipment, wherein the traditional C-shaped steel is of a long strip structure with a consistent section shape, and the C-shaped steel can be rapidly produced by adopting mature roll forming equipment in the prior art.
Disclosure of Invention
The invention aims to provide a female die for partial secondary molding of section steel, which can be matched with a male die to realize two actions of flattening and inward turning of a bottom corner of C-shaped steel.
The technical scheme adopted by the invention is as follows:
the female die for the local secondary molding of the section steel comprises a first working surface and a second working surface, wherein the first working surface and the second working surface are provided with mutually attached edges, the first working surface and the second working surface are in relative pivot joint fit by taking the mutually attached edges as axes, the first working surface and the second working surface swing relatively to switch between a first working position and a second working position, the first working surface and the second working surface are coplanar in the first working position, and the first working surface and the second working surface form a V-shaped groove with an included angle in the second working position; the first working surface and the second working surface are assembled to enable the first working surface and the second working surface to be kept at the first working position when the area, away from the hinge axis, of the first working surface and the second working surface is extruded by external force, and enable the first working surface and the second working surface to be kept at the second working position when the area, where the hinge axis of the first working surface and the second working surface is located, of the first working surface and the second working surface is extruded by external force.
The female die is used for forming a local bottom angle of the C-shaped steel into an inward concave sink, wherein a pre-punched gap is arranged between the local bottom angle and other areas of the bottom angle; the die is positioned at the inner side of the bottom angle of the C-shaped steel during forming, when the first working surface and the second working surface are positioned at a station, the first working surface and the second working surface are obliquely and oppositely arranged with the bottom angle of the C-shaped steel, and at the moment, the die is matched with a plane die arranged at the outer side of the C-shaped steel to flatten the local bottom angle; when the first working surface and the second working surface are positioned at the second station, the first working surface and the second working surface are respectively perpendicular to the bottom surface and the side surface of the C-shaped steel, the first working surface and the second working surface are movably arranged along the angular bisector direction of the base angle, and at the moment, the female die is matched with the angular male die on the outer side of the C-shaped steel to be used for secondarily stamping the flattened local base angle into a concave sink.
The first working surface and the second working surface are respectively positioned on the first swinging block and the second swinging block, the first swinging block and the second swinging block are rotationally connected with an inner sliding part, the inner sliding part is in sliding connection with the inner die seat, and the sliding direction is parallel to the bottom angle bisector direction of the C-shaped steel.
The first swing block and the second swing block both comprise a body with a right triangle section and a connecting part which is arranged along the normal direction of one right-angle side of the body in a protruding way, the first working surface and the second working surface are surfaces corresponding to inclined planes of the two body sections respectively, the connecting part and the inner sliding part are respectively provided with an arc groove and an arc convex strip which are in sliding fit with each other, and the arc centers of the arc groove and the arc convex strip are positioned on the hinge axes of the first working surface and the second working surface.
The inner die holder is provided with a slide way matched with the inner sliding part, the inner die holder is also provided with a first splicing surface and a second splicing surface which are respectively parallel to the bottom surface and the side surface of the C-shaped steel and are adjacent to two opposite inner walls of the slide way, when the first working surface and the second working surface are positioned at a second station and the first swinging block and the second swinging block shrink along with the inner sliding part and are in the slide way, the first working surface is parallel to the first splicing surface, the second working surface is parallel to the second splicing surface, and the surfaces, perpendicular to the surfaces where the connecting parts are positioned, of the two bodies are attached to the inner walls of the slide way.
The first swing block and the second swing block are provided with elastic elements, when the first swing block and the second swing block are protruded to the outer side of the slideway, the first swing block and the second swing block can enable the first working face and the second working face to be kept at the first station under the elastic action of the elastic elements, when the first swing block and the second swing block slide in the slideway along with the inner die seat, the first swing block and the second swing block can swing under the blocking action of the first splicing face and the second splicing face, and the first working face and the second working face are enabled to be switched from the first station to the second station.
The elastic element is two tension springs respectively arranged between the inner sliding part and the first swinging block and between the inner sliding part and the second swinging block.
The internal mold seat is fixedly connected with the frame, the frame is also provided with an internal mold driving block, the internal mold driving block is in sliding connection with the frame along the vertical direction, the frame is provided with a driving element for driving the internal mold driving block to slide up and down, the internal mold driving block is provided with a horizontal waist-shaped hole, the internal mold driving block is provided with a pin column, and the pin column is in sliding fit with the horizontal waist-shaped hole, so that the internal mold driving block can drive the internal sliding part to slide in the slideway when sliding up and down.
And the inner die holder is also provided with a horizontal positioning surface and a vertical positioning surface which are respectively abutted with the bottom surface and the side surface of the C-shaped steel.
A C-shaped steel local forming device comprises the female die for local secondary forming of the shaped steel.
The invention has the technical effects that: the female die can be switched between two states of a plane and a groove, and can sequentially realize flattening and inward turning of the bottom angle of the C-shaped steel when being matched with the male die, so that automatic forming of the C-shaped steel sink is realized.
Drawings
FIG. 1 is a schematic view of a partial forming process of a profile provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of a partial forming apparatus provided by an embodiment of the present invention;
FIG. 3 is a schematic view of another state of the partial forming apparatus provided by the embodiment of the present invention;
FIG. 4 is a schematic view of a further state of the partial forming apparatus provided by an embodiment of the present invention;
FIG. 5 is a perspective view of a female mold provided by an embodiment of the present invention;
FIG. 6 is an exploded view of a female mold provided by an embodiment of the present invention;
FIG. 7 is a perspective view of a male mold provided by an embodiment of the present invention;
FIG. 8 is an exploded view of a male mold provided by an embodiment of the present invention;
FIG. 9 is a perspective view of a male die linkage provided by an embodiment of the present invention;
FIG. 10 is an exploded view of a male die linkage provided by an embodiment of the present invention;
fig. 11 is a perspective view of an outer slide and a locking mechanism provided by an embodiment of the present invention.
Detailed Description
The present invention will be specifically described with reference to examples below in order to make the objects and advantages of the present invention more apparent. It should be understood that the following text is intended to describe only one or more specific embodiments of the invention and does not limit the scope of the invention strictly as claimed.
Example 1
As shown in fig. 2, 3 and 4, a local forming device of C-shaped steel is used for forming a local bottom corner 2 of the C-shaped steel 1 into an inward concave sink 4 shown in fig. 1, wherein a pre-punched gap 3 is arranged between the local bottom corner 2 and other areas of the bottom corner 2, the device comprises a female die and a male die, the female die comprises a first working surface 11 and a second working surface 12, the first working surface 11 and the second working surface 12 are provided with a mutually attached edge, the first working surface 11 and the second working surface 12 form relative pivot joint with the mutually attached edge as an axis, the first working surface 11 and the second working surface 12 relatively swing to switch between a first working position and a second working position, the first working surface 11 and the second working surface 12 are coplanar in a first working position, and the first working surface 11 and the second working surface 12 form a V-shaped groove with an included angle in a second working position; the first working surface 11 and the second working surface 12 are assembled to enable the first working surface 11 and the second working surface 12 to be kept at the first working position when the area of the first working surface 11 and the second working surface 12 far from the hinge axis is extruded by external force, and enable the first working surface 11 and the second working surface 12 to be kept at the second working position when the area of the first working surface 11 and the second working surface 12 where the hinge axis is located is extruded by external force; the male die comprises a third working surface 21 and a fourth working surface 22, the third working surface 21 and the fourth working surface 22 are provided with mutually attached edges, the third working surface 21 and the fourth working surface 22 form relative pivot joint fit by taking the mutually attached edges as axes, the third working surface 21 and the fourth working surface 22 relatively swing to switch between a station a and a station b, wherein the third working surface 21 and the fourth working surface 22 are coplanar in a station a state, and the third working surface 21 and the fourth working surface 22 form V-shaped bulges with included angles in a station b state; the female die is positioned at the inner side of the bottom corner 2 of the C-shaped steel 1 during forming, the male die is positioned at the outer side of the bottom corner 2 of the C-shaped steel 1, the third working face 21 and the fourth working face 22 are positioned at a station a when the first working face 11 and the second working face 12 are positioned at a station, the first working face 11 and the second working face 12 are obliquely arranged opposite to the inner side of the bottom corner 2 of the C-shaped steel 1, the third working face 21 and the fourth working face 22 are obliquely arranged opposite to the outer side of the bottom corner 2 of the C-shaped steel 1, and the female die and the male die are mutually matched for flattening the local bottom corner 2; when the first working surface 11 and the second working surface 12 are at the second station, the third working surface 21 and the fourth working surface 22 are at the second station, at this time, the first working surface 11 and the second working surface 12 are respectively perpendicular to the bottom surface and the side surface of the C-shaped steel 1, the third working surface 21 and the fourth working surface 22 are respectively perpendicular to the bottom surface and the side surface of the C-shaped steel 1, the first working surface 11 and the second working surface 12 are movably arranged along the angular bisector direction of the bottom angle 2, the third working surface 21 and the fourth working surface 22 are movably arranged along the angular bisector direction of the bottom angle 2, and at this time, the female die and the male die are mutually matched to secondarily stamp the flattened partial bottom angle 2 into the concave sink 4.
The invention firstly adopts a blanking die to punch a gap 3 for separating the region of the sinking groove 4 on the steel belt, then uses rolling forming equipment to roll the steel belt into C-shaped steel, and then uses a local forming device to independently punch and form the region of the sinking groove 4. The partial forming device of the invention has two working states, namely plane stamping and angular stamping, as shown in figures 1, 2 and 3, firstly the bottom angle 2 between two slits 3 is stamped into a plane shape by using the plane stamping state, and then the area between the two slits 3 is stamped into a concave sink 4 by using the angular stamping state as shown in figure 4. The local forming device can directly form the bottom angle 2 which is bent outwards into the sink groove 4 which is bent inwards, so that the upstream rolling equipment of the C-shaped steel 1 is not required to be modified, the local forming equipment can be directly added at the downstream of the existing rolling equipment, the equipment modification cost is reduced, and in addition, the local forming device can realize two different stamping states at the same station, the occupied area of the equipment is saved, and meanwhile, the forming efficiency is improved.
Preferably, as shown in fig. 2-6, the first working surface 11 and the second working surface 12 are respectively located on the first swinging block 13 and the second swinging block 14, the first swinging block 13 and the second swinging block 14 are rotatably connected with an inner sliding part 15, the inner sliding part 15 is slidably connected with the inner die holder 10, and the sliding direction is parallel to the bisector direction of the bottom angle 2 of the C-shaped steel 1; the first swinging block 13 and the second swinging block 14 both comprise a body with a right triangle section and a connecting part arranged along the normal direction of one right-angle side of the body in a protruding way, the first working surface 11 and the second working surface 12 are respectively corresponding surfaces of inclined planes of the two body sections, the connecting part and the inner sliding part 15 are respectively provided with an arc groove and an arc convex strip which are in sliding fit with each other, and the arc centers of the arc groove and the arc convex strip are positioned on the hinge axes of the first working surface 11 and the second working surface 12; the inner die holder 10 is provided with a slide way 16 matched with the inner sliding part 15, the inner die holder 10 is also provided with a first splicing surface 101 and a second splicing surface 102 which are respectively parallel to the bottom surface and the side surface of the C-shaped steel 1, the first splicing surface 101 and the second splicing surface 102 are respectively adjacent to two opposite inner walls of the slide way 16, when the first working surface 11 and the second working surface 12 are positioned at a second station and the first swinging block 13 and the second swinging block 14 shrink along with the inner sliding part 15 and are in the slide way 16, the first working surface 11 is parallel to the first splicing surface 101, the second working surface 12 is parallel to the second splicing surface 102, and the surfaces perpendicular to the surfaces where the connecting parts are positioned on the two bodies are attached to the inner walls of the slide way 16.
An elastic element 17 is arranged between the first swinging block 13 and the second swinging block 14 and the inner die holder 10, when the first swinging block 13 and the second swinging block 14 extend to the outer side of the slideway 16, the first swinging block 13 and the second swinging block 14 can keep the first working surface 11 and the second working surface 12 at the first station under the elastic action of the elastic element 17, and when the first swinging block 13 and the second swinging block 14 slide along the inner die holder 10 into the slideway 16, the first swinging block 13 and the second swinging block 14 can swing under the blocking action of the first splicing surface 101 and the second splicing surface 102 and can enable the first working surface 11 and the second working surface 12 to be switched from the first station to the second station; the elastic element 17 is two tension springs respectively provided between the inner slide 15 and the first pendulum 13 and between the inner slide 15 and the second pendulum 14.
The inner die seat 10 is fixedly connected with the frame, the frame is also provided with an inner die driving block 18, the inner die driving block 18 is in sliding connection with the frame along the vertical direction, the frame is provided with a driving element for driving the inner die driving block 18 to slide up and down, the inner die driving block 18 is provided with a horizontal waist-shaped hole, the inner die driving block 15 is provided with a pin column, and the pin column is in sliding fit with the horizontal waist-shaped hole, so that the inner die driving block 18 can drive the inner sliding part 15 to slide in the slideway 16 when sliding up and down; the inner die seat 10 is also provided with a horizontal positioning surface and a vertical positioning surface which are respectively abutted with the bottom surface and the side surface of the C-shaped steel 1.
The working principle of the female die is as follows: as shown in fig. 2 in the initial state, the first swinging block 13 and the second swinging block 14 are contracted in the slideway 16, when the area between the two gaps 3 on the C-shaped steel 1 reaches the female mold position, the inner mold driving block 18 descends to drive the first swinging block 13 and the second swinging block 14 to extend outwards, in the process, the first swinging block 13 and the second swinging block 14 are mutually opened under the action of the elastic element 17 until reaching the state shown in fig. 3, at the moment, the piston cylinder above the inner mold driving block 18 maintains pressure, the male mold is switched to the state shown in fig. 2 and 3, and then the bottom angle 2 between the two gaps 3 is extruded to deform into the state shown in fig. 3; then the male mold is switched to the state shown in fig. 4, a piston cylinder above the inner mold driving block 18 is depressurized, the male mold pushes the first swing block 13 and the second swing block 14 to shrink inwards, the first swing block 13 and the second swing block 14 are mutually folded to the state shown in fig. 4 under the blocking of the end part of the slideway 16 in the shrinking process, when the male mold reaches the state shown in fig. 4, the sinking groove 4 is formed, and finally the male mold is driven to reset to the state shown in fig. 2.
As shown in fig. 2, 3, 4 and 7-11, the third working surface 21 and the fourth working surface 22 are respectively positioned on a third swinging block 23 and a fourth swinging block 24, the third swinging block 23 and the fourth swinging block 24 are in swinging connection with the outer sliding part 20, and the swinging axes of the third swinging block 23 and the fourth swinging block 24 are collinear with the mutually attached sides between the third working surface 21 and the fourth working surface 22; the outer sliding part 20 is arranged on the outer die holder 26 in a sliding manner, and the sliding direction is parallel to the direction of an angular bisector of the bottom angle 2 of the C-shaped steel 1; the third swinging block 23, the fourth swinging block 24, the outer sliding part 20 and the outer die holder 26 are provided with a linkage mechanism, the linkage mechanism is assembled to drive the third swinging block 23 and the fourth swinging block 24 to be unfolded so that the third working surface 21 and the fourth working surface 22 are switched from the station b to the station a when the outer sliding part 20 slides relative to the outer die holder 26 in the direction away from the C-shaped steel 1, and the linkage mechanism has the following two states when the outer sliding part 20 slides relative to the outer die holder 26 in the direction close to the C-shaped steel 1: in the first state, the outer sliding part 20 slides for a first stroke relative to the outer die holder 26, and in the process, the third swinging block 23 and the fourth swinging block 24 keep the unfolded state, namely, the third working surface 21 and the fourth working surface 22 keep at the station a; and in the second state, the outer sliding part 20 continues to slide for a second stroke relative to the outer die holder 26, and in the process, the third swinging block 23 and the fourth swinging block 24 are mutually folded to enable the third working surface 21 and the fourth working surface 22 to be switched from the station a to the station b.
As shown in fig. 9 and 10, the part of the linkage mechanism for driving the third swinging block 23 and the part for driving the fourth swinging block 24 have the same structure and are symmetrically arranged about the bisector between the third working surface 21 and the fourth working surface 22; the part for driving the third swinging block 23 comprises a first swinging rod 202, a second swinging rod 203, a third swinging rod 204, a first connecting rod 205 and a second connecting rod 206, wherein the first swinging rod 202, the second swinging rod 203 and the outer sliding part 20 are hinged, the third swinging rod 204 and a sliding block 207 are hinged, and the sliding direction of the sliding block 207 is parallel to the axis connecting line of the hinging shafts of the first swinging rod 202 and the second swinging rod 203 on the outer sliding part 20 and the hinging shafts of the third swinging rod 204 and the sliding block 207 and the hinging shafts of the first swinging rod 202 and the second swinging rod 203 on the outer sliding part 20 as seen along the direction of the hinging axes of the third working surface 21 and the fourth working surface 22; the first connecting rod 205 is pivoted with the first swing rod 202, the second swing rod 203 and the third swing block 23 respectively, and the connection between the pivot axes of the first swing rod 202 and the second swing rod 203 and the connection between the pivot axes of the first swing rod 202, the second swing rod 203 and the third swing block are parallel to the axis connecting line of the hinge shafts on the outer sliding part 20; the second connecting rod 206 is pivoted with the first swing rod 202 and the third swing block 23 respectively, and the pivot axis connecting line between the second connecting rod and the first swing rod 202 and the third swing block is also parallel to the axis connecting line of the hinge shafts of the first swing rod 202 and the second swing rod 203 on the outer sliding part 20; the first swing rod 202 is parallel to the second swing rod 203 and is parallel to the axis connecting line of the pivot shafts of the first connecting rod 205 and the second connecting rod 206 on the third swing block 23; the end of the third swing rod 204 far away from the sliding block 207 is pivoted with the first swing rod 202 or the second swing rod 203, so that the third swing block 23 can be driven to swing through each swing rod and connecting rod when the sliding block 207 slides relative to the outer sliding part 20, and the swing axis is just the relative swing axis between the third working surface 21 and the fourth working surface 22.
Further, as shown in fig. 10 and 11, the slide block 207 is provided with a stop pin 209 protruding to the outside of the outer slide portion 20, the outer die holder 26 is provided with a stopper 262 in contact with the stop pin 209, and when the outer slide portion 20 slides away from the C-shaped steel 1 relative to the outer die holder 26, the stopper 262 can push the stop pin 209 to slide the slide block 207 relative to the outer slide portion 20, and at this time, the slide block 207 drives the third swing block 23 and the fourth swing block 24 to be extended.
A first elastic unit 208 is arranged between the sliding block 207 and the outer sliding part 20, the first elastic unit 208 is assembled so that the elastic force of the first elastic unit 208 can drive the sliding block 207 to slide in a mode of driving the third swinging block 23 and the fourth swinging block 24 to be folded, a locking mechanism 25 is arranged between the sliding block 207 and the outer sliding part 20, the locking mechanism 25 is assembled so that the sliding block 207 can be kept at the station when the sliding block 207 slides to drive the third swinging block 23 and the fourth swinging block 24 to be unfolded, and the locking mechanism 25 can release the sliding block 207 when the outer sliding part 20 slides to a direction approaching to the C-shaped steel 1 and enters a second stroke so that the sliding block 207 drives the third swinging block 23 and the fourth swinging block 24 to be folded under the action of the first elastic unit 208.
As shown in fig. 11, the locking mechanism 25 includes a latch 251 disposed on the outer sliding portion 20, the latch 251 is slidably connected with the outer sliding portion 20, and the sliding direction of the latch 251 is perpendicular to the sliding direction of the slider 207, a second elastic unit 252 is disposed between the latch 251 and the outer sliding portion 20, and the second elastic unit 252 is assembled such that the elastic force thereof can drive the arrangement to protrude on the movement path of the stop pin 209; one side of the latch 251 is provided with a bevel, the latch 209 can push the latch 251 away from the movement path of the latch 209 through the bevel of the latch 251 in the process that the slide block 207 drives the third swing block 23 and the fourth swing block 24 to be unfolded under the interaction of the stop 262 and the latch 209, and the latch 251 can rebound to the movement path of the latch 209 and organize the return stroke of the latch 209 under the action of the second elastic unit 252 after the latch 209 passes the latch 251; the lock tongue 251 is further provided with a first wedge 253 for unlocking, the outer die holder 26 is provided with a second wedge 261, when the outer sliding part 20 slides towards the direction close to the C-shaped steel 1 and enters a second stroke, the first wedge 253 is in contact with the second wedge 261, and the second wedge 261 can push the lock tongue 251 away from a return path of the stop pin 209, so that the sliding block 207 can slide under the action of the first elastic unit 208 to drive the third swing block 23 and the fourth swing block 24 to close.
Further, as shown in fig. 7 and 8, the outer sliding portion 20 is slidably disposed on a pressing plate 27 along a horizontal direction, the pressing plate 27 is movably disposed on the frame along a vertical direction, a driving element for driving the pressing plate 27 to move up and down is disposed on the frame, the outer die holder 26 is movably disposed relative to the pressing plate 27 along the vertical direction, a third elastic unit 263 for driving the outer die holder 26 and the pressing plate 27 to separate from each other is disposed between the outer die holder 26 and the pressing plate 27, a horizontal pressing surface for pressing the bottom surface of the C-shaped steel 1 is further disposed on the outer die holder 26, and a vertical pressing surface for pressing the side surface of the C-shaped steel 1 is further disposed on the outer sliding portion 20.
The working principle of the male die is as follows: the pressing plate 27 and the outer die holder 26 are vertically separated from each other to separate the two outer sliding portions 20 from each other in the horizontal direction in the initial state, and the third swing block 23 and the fourth swing block 24 are in the flattened state shown in fig. 2; when the area between the two gaps 3 of the C-shaped steel 1 reaches the male mold, the pressing plate 27 moves upwards and drives the outer mold base 26 to move upwards, when the outer mold base 26 is abutted against the bottom surface of the C-shaped steel 1, the outer mold base 26 stops moving upwards, the pressing plate 27 moves upwards continuously to drive the two outer sliding parts 20 to fold mutually, at the moment, the female mold is in a flattened state shown in fig. 3, the male mold and the female mold cooperate to flatten the bottom corner 2 of the C-shaped steel 1, then the pressing plate 27 moves upwards continuously, the first wedge 253 is abutted against the second wedge 261 to push the lock tongue 251 away from the return path of the stop pin 209, at the moment, the sliding block 207 drives the third swing block 23 and the fourth swing block 24 to fold into a state shown in fig. 4 under the action of the first elastic unit 208, and simultaneously the female mold is also contracted into a state shown in fig. 4, and the two cooperate to reversely fold the flattened plate surface into a state shown in fig. 4 again.
Example 2
A section bar comprises a strip-shaped object with a C-shaped section formed by bending a steel plate, wherein concave sinking grooves 4 are arranged at the bottom corner 2 of the section of the strip-shaped object at intervals along the length direction of the strip-shaped object; the section bar is prepared by the following method:
step 1: punching two parallel gaps 3 on the steel belt by using a punching die, wherein the length direction of the two gaps 3 is parallel to the width direction of the steel belt;
step 2: rolling the steel strip into C-shaped steel 1 by using a rolling forming machine, wherein the folded edge at the bottom corner 2 of the C-shaped steel 1 is just positioned on the vertical middle branching line of the gap 3;
step 3: the partial forming device in the embodiment 1 is utilized to fold the folding angle between the two gaps 3 inwards to form the sinking groove 4; during forming, the bottom angle 2 between the two gaps 3 is flattened firstly, then the bottom surface and the side surfaces of the bottom angle 2 are turned inwards along the crease of the original bottom angle 2, and the turning angles of the bottom surface and the side surfaces are 90 degrees.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.
Claims (10)
1. A female die for shaped steel local secondary molding, its characterized in that: the working machine comprises a first working surface (11) and a second working surface (12), wherein the first working surface (11) and the second working surface (12) are provided with mutually-attached edges, the first working surface (11) and the second working surface (12) are in relative pivot joint fit by taking the mutually-attached edges as axes, the first working surface (11) and the second working surface (12) relatively swing to switch between a first working position and a second working position, the first working surface (11) and the second working surface (12) are coplanar in the first working position, and the first working surface (11) and the second working surface (12) form a V-shaped groove with an included angle in the second working position; the first working surface (11) and the second working surface (12) are assembled to enable the first working surface (11) and the second working surface (12) to be kept at the first station when the area of the first working surface (11) and the second working surface (12) far away from the hinge axis is extruded by external force, and enable the first working surface (11) and the second working surface (12) to be kept at the second station when the area of the first working surface (11) and the second working surface (12) where the hinge axis is extruded by external force.
2. The female die for partial overmoulding of section steel according to claim 1, wherein: the female die is used for forming a local bottom corner (2) of the C-shaped steel (1) into an inward concave sinking groove (4), wherein a pre-punched gap (3) is arranged between the local bottom corner (2) and other areas of the bottom corner (2); the female die is positioned at the inner side of a bottom corner (2) of the C-shaped steel (1) during forming, when the first working surface (11) and the second working surface (12) are positioned at a station, the first working surface (11) and the second working surface (12) are obliquely arranged opposite to the bottom corner (2) of the C-shaped steel (1), and at the moment, the female die is matched with a plane die arranged at the outer side of the C-shaped steel (1) to flatten the local bottom corner (2); when the first working surface (11) and the second working surface (12) are positioned at the second station, the first working surface (11) and the second working surface (12) are respectively perpendicular to the bottom surface and the side surface of the C-shaped steel (1), the first working surface (11) and the second working surface (12) are movably arranged along the angular bisector direction of the base angle (2), and at the moment, the female die is matched with an angular male die at the outer side of the C-shaped steel (1) to be used for secondarily stamping the flattened local base angle (2) into a concave sink (4).
3. The female die for partial overmoulding of section steel according to claim 2, wherein: the first working surface (11) and the second working surface (12) are respectively positioned on the first swinging block (13) and the second swinging block (14), the first swinging block (13) and the second swinging block (14) are rotationally connected with an inner sliding part (15), the inner sliding part (15) is in sliding connection with the inner die holder (10), and the sliding direction is parallel to the bisector direction of the bottom angle (2) of the C-shaped steel (1).
4. A female mould for the partial overmoulding of profiled bars according to claim 3, characterized in that: the first swinging block (13) and the second swinging block (14) both comprise a body with a right triangle section and a connecting part which is arranged along the normal direction of one right-angle side of the body in a protruding mode, the first working surface (11) and the second working surface (12) are surfaces corresponding to inclined planes of the two body sections respectively, an arc groove and an arc convex strip which are in sliding fit with each other are arranged on the connecting part and the inner sliding part (15) respectively, and the arc centers of the arc groove and the arc convex strip are located on the hinge axes of the first working surface (11) and the second working surface (12).
5. The female die for partial overmoulding of shaped steel according to claim 4, wherein: the inner die holder (10) is provided with a slide way (16) matched with the inner sliding part (15), the inner die holder (10) is also provided with a first splicing surface (101) and a second splicing surface (102) which are respectively parallel to the bottom surface and the side surface of the C-shaped steel (1), the first splicing surface (101) and the second splicing surface (102) are respectively adjacent to the opposite inner walls of the slide way (16), when the first working surface (11) and the second working surface (12) are positioned at a second station, and the first swinging block (13) and the second swinging block (14) are contracted with the inner sliding part (15) and are aligned with the slide way (16), the first working surface (11) is aligned with the first splicing surface (101), the second working surface (12) is aligned with the second splicing surface (102), and the surfaces perpendicular to the surfaces of the connecting parts on the two bodies are attached to the inner walls of the slide way (16).
6. The female die for partial overmoulding of section steel according to claim 5, wherein: elastic elements (17) are arranged between the first swinging block (13) and the second swinging block (14) and the inner die holder (10), when the first swinging block (13) and the second swinging block (14) are protruded to the outer side of the slideway (16), the first swinging block (13) and the second swinging block (14) can enable the first working surface (11) and the second working surface (12) to be kept at the first station under the elastic action of the elastic elements (17), and when the first swinging block (13) and the second swinging block (14) slide along with the inner die holder (10) into the slideway (16), the first swinging block (13) and the second swinging block (14) can swing under the blocking action of the first splicing surface (101) and the second splicing surface (102) and enable the first working surface (11) and the second working surface (12) to be switched from the first station to the second station.
7. The female die for partial overmoulding of section steel according to claim 6, wherein: the elastic element (17) is two tension springs respectively arranged between the inner sliding part (15) and the first swinging block (13) and between the inner sliding part (15) and the second swinging block (14).
8. The female die for partial overmoulding of section steel according to claim 7, wherein: the inner die holder (10) is fixedly connected with the frame, the frame is further provided with an inner die driving block (18), the inner die driving block (18) is in sliding connection with the frame along the vertical direction, the frame is provided with a driving element for driving the inner die driving block (18) to slide up and down, the inner die driving block (18) is provided with a horizontal waist-shaped hole, the inner die driving block (18) is provided with a pin column, the pin column is in sliding fit with the horizontal waist-shaped hole, and the inner die driving block (18) can drive the inner sliding part (15) to slide in the slideway (16) when sliding up and down.
9. The female die for partial overmoulding of section steel according to claim 8, wherein: the inner die holder (10) is also provided with a horizontal positioning surface and a vertical positioning surface which are respectively abutted with the bottom surface and the side surface of the C-shaped steel (1).
10. The utility model provides a local forming device of C shaped steel which characterized in that: comprising a negative mold for partial overmoulding of section steel according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011345656.9A CN112517750B (en) | 2020-11-26 | 2020-11-26 | Female die for local secondary forming of section steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011345656.9A CN112517750B (en) | 2020-11-26 | 2020-11-26 | Female die for local secondary forming of section steel |
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| Publication Number | Publication Date |
|---|---|
| CN112517750A CN112517750A (en) | 2021-03-19 |
| CN112517750B true CN112517750B (en) | 2023-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011345656.9A Active CN112517750B (en) | 2020-11-26 | 2020-11-26 | Female die for local secondary forming of section steel |
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| CN (1) | CN112517750B (en) |
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| CN112517750A (en) | 2021-03-19 |
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Effective date of registration: 20230322 Address after: 252500 Northeast corner of the intersection of Wuxun Avenue and Ranzi Road, Guanxian Economic Development Zone, Liaocheng City, Shandong Province Applicant after: Shandong Dehao Transportation Facilities Co.,Ltd. Address before: 301600 in No.9 Taibo South Road, Jinghai Economic Development Zone, Jinghai District, Tianjin Applicant before: Tong Dangui |
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