CN112547926A

CN112547926A - Local forming device of C shaped steel

Info

Publication number: CN112547926A
Application number: CN202011345640.8A
Authority: CN
Inventors: 童丹桂
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-03-26

Abstract

The invention belongs to the technical field of production and processing of section bar supports, and particularly relates to a C-shaped steel local forming device which comprises a female die and a male die, wherein the female die comprises a first working surface and a second working surface which are relatively pivoted and matched; the male die comprises a third working surface and a fourth working surface, and the third working surface and the fourth working surface are in pivot joint matching relatively. The invention firstly uses the plane stamping state to stamp the base angle between two gaps into the plane shape, and then uses the angle stamping state to stamp the area between two gaps into the concave sinking groove. The local forming device can directly form the outwards bent bottom corners into the inwards bent sinking grooves, so that the upstream rolling equipment of the C-shaped steel is not required to be modified, the equipment modification cost is reduced, in addition, the local forming device can realize two different stamping states at the same station, the equipment floor area is saved, and the forming efficiency is improved.

Description

Local forming device of C shaped steel

Technical Field

The invention belongs to the technical field of production and processing of section bar supports, and particularly relates to a C-shaped steel local forming device.

Background

The C-shaped steel is widely applied to a plurality of fields of construction, industrial and agricultural production and the like, is mainly used as a framework of construction facilities or industrial equipment, is generally of a long strip structure with consistent section shape, can be rapidly produced by adopting mature roll forming equipment in the prior art, and is suitable for assembly of some special occasions.

Disclosure of Invention

The invention aims to provide a local forming device for C-shaped steel, which can realize the automatic forming of a local sink groove of the C-shaped steel.

The technical scheme adopted by the invention is as follows:

a C-shaped steel local forming device is used for forming a local bottom corner of C-shaped steel into an inwards concave sinking groove, wherein a pre-punched gap is arranged between the local bottom corner and other areas of the bottom corner, and comprises a female die and a male die, the female die comprises a first working surface and a second working surface, the first working surface and the second working surface are provided with edges which are mutually attached, the first working surface and the second working surface form relative pivoting matching by taking the edges which are mutually attached as an axis, the first working surface and the second working surface swing relatively to switch between a first station and a second station, wherein the first working surface and the second working surface are coplanar in a first station state, and the first working surface and the second working surface form a V-shaped groove with an included angle in a second station state; 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 a first station when the areas of the first working surface and the second working surface, which are far away from the hinge axis, are extruded by external force, and enable the first working surface and the second working surface to be kept at a second station when the areas of the first working surface and the second working surface, which are located by the hinge axis, are extruded by external force; the male die comprises a third working surface and a fourth working surface, the third working surface and the fourth working surface are provided with edges which are mutually attached, the third working surface and the fourth working surface form relative pivoting matching by taking the edges which are mutually attached as axes, the third working surface and the fourth working surface swing relatively to switch between a station a and a station b, wherein the third working surface and the fourth working surface are coplanar in the state of the station a, and the third working surface and the fourth working surface form a V-shaped bulge with an included angle in the state of the station b; when the forming is carried out, the female die is positioned on the inner side of the bottom angle of the C-shaped steel, the male die is positioned on the outer side of the bottom angle of the C-shaped steel, when the first working surface and the second working surface are positioned at the working positions, the third working surface and the fourth working surface are positioned at the working position a, the first working surface and the second working surface are obliquely and oppositely arranged with the inner side of the bottom angle of the C-shaped steel, the third working surface and the fourth working surface are obliquely and oppositely arranged with the outer side of the bottom angle of the C-shaped steel, and the female die and the male die are mutually matched for; when the first working face and the second working face are positioned at the second station, the third working face and the fourth working face are positioned at the second station, the first working face and the second working face are respectively vertical to the bottom surface and the side surface of the C-shaped steel, the third working face and the fourth working face are respectively vertical to the bottom surface and the side surface of the C-shaped steel, the first working face and the second working face are movably arranged along the angular bisector direction of the bottom angle, the third working face and the fourth working face are movably arranged along the angular bisector direction of the bottom angle, and the female die and the male die are mutually matched for secondary punching of the flattened local bottom angle into an inwards concave groove.

The first working surface and the second working surface are respectively positioned on the first swing block and the second swing block, the first swing block and the second swing block are rotatably connected with an inner sliding part, the inner sliding part is slidably connected with the inner die base, 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 respectively comprise a body with a right-angled triangle section and a connecting part convexly arranged along the normal direction of one right-angled edge of the body, the first working surface and the second working surface are respectively surfaces corresponding to inclined surfaces of the two body sections, an arc-shaped groove and an arc-shaped convex strip which are mutually matched in a sliding manner are respectively arranged on the connecting part and the inner sliding part, and arc centers of the arc-shaped groove and the arc-shaped convex strip are positioned on an articulated axis of the first working surface and the second working surface; the inner die holder is provided with a slide matched with the inner sliding part, the inner die holder is further provided with a first splicing surface and a second splicing surface which are respectively connected with the bottom surface of the C-shaped steel and the side surface of the C-shaped steel and up to the inner wall, the first splicing surface and the second splicing surface are respectively arranged adjacent to the inner wall of the slide, when the first working surface and the second working surface are positioned at the station two and the first swinging block and the second swinging block are contracted along with the inner sliding part and the slide, the first working surface is parallel and level to the first splicing surface, the second working surface is parallel and level to the second splicing surface, and the surfaces which are perpendicular to the surfaces of the connecting parts on the two bodies are attached to the inner wall of.

Elastic elements are arranged between the first swing block and the inner die base, when the first swing block and the second swing block protrude to the outer side of the slide way, the first swing block and the second swing block can enable the first working face and the second working face to be kept at a first working position under the elastic force action of the elastic elements, and when the first swing block and the second swing block slide towards the slide way along with the inner die base, 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 enable the first working face and the second working face to be switched from the first working position to a second working position; the elastic element is two tension springs respectively arranged between the inner sliding part and the first swing block and between the inner sliding part and the second swing block.

The inner die holder is fixedly connected with the rack, an inner die driving block is further arranged on the rack, the inner die driving block is connected with the rack in a sliding mode along the vertical direction, a driving element for driving the inner die driving block to slide up and down is arranged on the rack, a horizontal waist-shaped hole is formed in the inner die driving block, a pin column is arranged on the inner sliding portion, the pin column is in sliding fit with the horizontal waist-shaped hole, and the inner sliding portion can be driven to slide in the slideway when the inner die driving block slides 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 against the bottom surface and the side surface of the C-shaped steel.

The third working surface and the fourth working surface are respectively positioned on the third swinging block and the fourth swinging block, the third swinging block and the fourth swinging block are in swinging connection with the outer sliding part, and swinging axes of the third swinging block and the fourth swinging block are collinear with the edge where the third working surface and the fourth working surface are mutually attached; the outer sliding part is arranged on the outer die holder in a sliding mode, and the sliding direction of the outer sliding part is parallel to the angular bisector direction of the bottom angle of the C-shaped steel; a linkage mechanism is arranged among the third swinging block, the fourth swinging block, the outer sliding part and the outer die base, the linkage mechanism is assembled to drive the third swinging block and the fourth swinging block to be unfolded to enable the third working surface and the fourth working surface to be switched from the working position b to the working position a when the outer sliding part slides relative to the outer die base in the direction far away from the C-shaped steel, and the outer sliding part has the following two states when sliding relative to the outer die base in the direction close to the C-shaped steel: in the first state, the outer sliding part slides for a first stroke relative to the outer die holder, and in the process, the third swinging block and the fourth swinging block keep unfolded states, namely the third working surface and the fourth working surface are kept at a station a; and in the second state, the outer sliding part continuously slides for a second stroke relative to the outer die holder, and in the process, the third swinging block and the fourth swinging block are folded to enable the third working surface and the fourth working surface to be switched from the station a to the station b.

The part of the linkage mechanism for driving the third swing block and the part of the linkage mechanism for driving the fourth swing block have the same structure, and the linkage mechanism and the fourth swing block are symmetrically arranged relative to a bisection plane between the third working surface and the fourth working surface; the part for driving the third swing block comprises a first swing rod, a second swing rod, a third swing rod, a first connecting rod and a second connecting rod, wherein the first swing rod and the second swing rod are hinged with the outer sliding part; the first connecting rod is respectively pivoted with the first swing rod, the second swing rod and the third swing block, and the connection between the first connecting rod and the pivot axes of the first swing rod, the second swing rod and the third swing block is parallel to the axis connecting line of the hinged shaft of the first swing rod and the second swing rod on the outer sliding part; the second connecting rod is respectively pivoted with the first swing rod and the third swing block, and is also parallel to the axis connecting line of the hinged shaft of the first swing rod and the second swing rod on the outer sliding part with the axis connecting line of the pivot between the first swing rod and the third swing block; the first swing rod and the second swing rod are parallel and are parallel to the axis connecting line of the first connecting rod and the second connecting rod on the pivot of the third swing block; one end of the third oscillating bar, which is far away from the sliding block, is pivoted with the first oscillating bar or the second oscillating bar, so that the sliding block can drive the third oscillating block to oscillate through the oscillating bars and the connecting rod when sliding relative to the outer sliding part, and the oscillating axis is just the relative oscillating axis between the third working surface and the fourth working surface.

The sliding block is provided with a stop pin protruding to the outer side of the outer sliding part, the outer die holder is provided with a stop block connected with the stop pin in a blocking mode, when the outer sliding part slides relative to the outer die holder in the direction far away from the C-shaped steel, the stop block can push the stop pin to enable the sliding block to slide relative to the outer sliding part, and at the moment, the sliding block drives the third swinging block and the fourth swinging block to unfold.

The first elastic unit is arranged between the sliding block and the outer sliding portion, the elastic force of the first elastic unit can drive the sliding block to slide in a mode of driving the third swing block and the fourth swing block to be folded, the locking mechanism is arranged between the sliding block and the outer sliding portion, the locking mechanism is arranged to enable the sliding block to be kept at the station when the sliding block slides to drive the third swing block and the fourth swing block to be unfolded, and when the outer sliding portion slides towards the direction close to the C-shaped steel and enters a second stroke, the locking mechanism can release the sliding block to enable the sliding block to drive the third swing block and the fourth swing block to be folded under the action of the first elastic unit.

The locking mechanism comprises a lock tongue arranged on the outer sliding part, the lock tongue is connected with the outer sliding part in a sliding mode, the sliding direction of the lock tongue is perpendicular to that of the sliding block, a second elastic unit is arranged between the lock tongue and the outer sliding part, and the second elastic unit is assembled in a mode that the elastic force of the second elastic unit can drive the lock tongue to protrude and extend on the movement path of the stop pin; when the sliding block drives the third swing block and the fourth swing block to unfold under the interaction of the stop block and the stop pin, the stop pin can push the lock tongue away from the movement path of the stop pin through the inclined surface of the lock tongue, and after the stop pin passes through the lock tongue, the lock tongue can rebound to the movement path of the stop pin under the action of the second elastic unit and organize the return stroke of the stop pin; still be equipped with the first wedge that is used for the unblock on the spring bolt, be equipped with the second wedge on the outer die holder, first wedge contradicts with the second wedge and the second wedge can push away the spring bolt from the return stroke route of backing pin when the outer slip portion slides to the direction that is close to C shaped steel and gets into the second stroke, makes the slider can slide under the effect of first elastic element and fold with drive third pendulum piece and fourth pendulum piece.

The outer sliding part is arranged on a pressing plate in a sliding mode along the horizontal direction, the pressing plate is movably arranged on the rack in the vertical direction, a driving element used for driving the pressing plate to move up and down is arranged on the rack, the outer die holder is movably arranged relative to the pressing plate in the vertical direction, a third elastic unit used for driving the outer die holder and the pressing plate to be away from each other is arranged between the outer die holder and the pressing plate, a horizontal extrusion surface used for compressing the bottom surface of the C-shaped steel is further arranged on the outer die holder, and a vertical extrusion surface used for compressing the side surface of the C-shaped steel is further arranged on the outer sliding.

The invention has the technical effects that: the local forming device has two working states, namely plane stamping and angular stamping, firstly, the bottom angle between two gaps is stamped into a plane shape by using the plane stamping state, and then, the area between the two gaps is stamped into an inward sunken groove by using the angular stamping state. The local forming device can directly form the outwards bent bottom corners into the inwards bent sinking grooves, so that the upstream rolling equipment of the C-shaped steel is not required to be modified, the local forming equipment can be directly additionally arranged at the downstream of the existing rolling equipment, the equipment modification cost is reduced, in addition, the local forming device can realize two different stamping states at the same station, the equipment floor area is saved, and the forming efficiency is improved.

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 molding apparatus provided by an embodiment of the present invention;

FIG. 3 is a schematic view of another state of a partial molding apparatus provided in an embodiment of the present invention;

FIG. 4 is a schematic diagram of another state of a partial molding 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;

figure 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 lock mechanism provided in an embodiment of the present invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.

Example 1

As shown in fig. 2, 3 and 4, a partial forming apparatus for C-section steel, for forming a partial base angle 2 of C-section steel 1 into an inwardly depressed 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, and 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 edges which are mutually attached, the first working surface 11 and the second working surface 12 form relative pivot joint matching by taking the edges which are mutually attached as axes, the first working surface 11 and the second working surface 12 swing relatively to switch between a first station and a second station, the first working surface 11 and the second working surface 12 are coplanar in the first station state, and the first working surface 11 and the second working surface 12 form a V-shaped groove with an included angle in the second station state; 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 a first working position 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 a second working position when the area of the hinge axis of the first working surface 11 and the second working surface 12 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 edges which are mutually attached, the third working surface 21 and the fourth working surface 22 are in relative pivot joint matching by taking the edges which are mutually attached as axes, the third working surface 21 and the fourth working surface 22 swing relatively 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 the state of the station a, and the third working surface 21 and the fourth working surface 22 form a V-shaped bulge with an included angle in the state of the station b; when in molding, the female die is positioned on the inner side of the bottom corner 2 of the C-shaped steel 1, the male die is positioned on the outer side of the bottom corner 2 of the C-shaped steel 1, when the first working surface 11 and the second working surface 12 are positioned at the working positions, the third working surface 21 and the fourth working surface 22 are positioned at the working position a, the first working surface 11 and the second working surface 12 are obliquely and oppositely arranged with the inner side of the bottom corner 2 of the C-shaped steel 1, the third working surface 21 and the fourth working surface 22 are obliquely and oppositely arranged with 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; when the first working surface 11 and the second working surface 12 are positioned at the second station, the third working surface 21 and the fourth working surface 22 are positioned 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 base angle 2, the third working surface 21 and the fourth working surface 22 are movably arranged along the angular bisector direction of the base angle 2, and at this time, the female die and the male die are mutually matched for punching the flattened local base angle 2 into the concave sinking groove 4 for the second time.

According to the invention, a blanking die is adopted to punch a gap 3 for separating a sink groove 4 area on a steel strip, then the steel strip is rolled into C-shaped steel by using roll forming equipment, and the sink groove 4 area is separately punched and formed by using a local forming device. The local 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 corner 2 between two gaps 3 is stamped into a plane shape by using the plane stamping state, and then, the area between the two gaps 3 is stamped into an inward sunken groove 4 by using the angular stamping state as shown in figure 4. The local forming device can directly form the outwards bent bottom corners 2 into the inwards bent sinking grooves 4, 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 additionally arranged at the downstream of the existing rolling equipment, the equipment modification cost is reduced, in addition, the local forming device can realize two different stamping states at the same station, the equipment floor area is saved, and the forming efficiency is improved.

Preferably, as shown in fig. 2 to 6, the first working surface 11 and the second working surface 12 are respectively located on a first swing block 13 and a second swing block 14, the first swing block 13 and the second swing block 14 are rotatably connected with an inner sliding portion 15, the inner sliding portion 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 swing block 13 and the second swing block 14 both comprise a body with a right-angled triangle cross section and a connecting part convexly arranged along the normal direction of one right-angled side of the body, the first working surface 11 and the second working surface 12 are respectively surfaces corresponding to inclined surfaces of the cross sections of the two bodies, an arc-shaped groove and an arc-shaped convex strip which are in sliding fit with each other are respectively arranged on the connecting part and the inner sliding part 15, and the arc centers of the arc-shaped groove and the arc-shaped convex strip are positioned on the hinge axis of the first working surface 11 and the second working surface 12; the inner die holder 10 is provided with a slide 16 matched with the inner sliding portion 15, the inner die holder 10 is further provided with a first splicing surface 101 and a second splicing surface 102 which are respectively up 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 arranged adjacent to two inner walls of the slide 16, when the first working surface 11 and the second working surface 12 are positioned at the second station and the first swinging block 13 and the second swinging block 14 are contracted along with the inner sliding portion 15 and are arranged in the slide 16, the first working surface 11 is parallel and level to the first splicing surface 101, the second working surface 12 is parallel and level to the second splicing surface 102, and the surfaces perpendicular to the surfaces where the connecting portions are positioned on the two bodies are attached to the inner walls of the slide 16.

An elastic element 17 is arranged between the first swing block 13 and the inner die holder 10 and between the second swing block 14 and the inner die holder 10, when the first swing block 13 and the second swing block 14 protrude to the outer side of the slide way 16, the first swing block 13 and the second swing block 14 can enable the first working surface 11 and the second working surface 12 to be kept at a first station under the elastic force action of the elastic element 17, and when the first swing block 13 and the second swing block 14 slide in the slide way 16 along with the inner die holder 10, the first swing block 13 and the second swing 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; the elastic element 17 is two tension springs respectively disposed between the inner slide portion 15 and the first swing block 13 and between the inner slide portion 15 and the second swing block 14.

The inner die holder 10 is fixedly connected with a rack, an inner die driving block 18 is further arranged on the rack, the inner die driving block 18 is connected with the rack in a sliding mode along the vertical direction, a driving element for driving the inner die driving block 18 to slide up and down is arranged on the rack, a horizontal waist-shaped hole is formed in the inner die driving block 18, a pin is arranged on the inner sliding portion 15 and is in sliding fit with the horizontal waist-shaped hole, and the inner sliding portion 15 can be driven to slide in the slideway 16 when the inner die driving block 18 slides up and down; and the inner die holder 10 is also provided with a horizontal positioning surface and a vertical positioning surface which are respectively abutted against the bottom surface and the side surface of the C-shaped steel 1.

The working principle of the female die is as follows: in the initial state, as shown in fig. 2, the first swing block 13 and the second swing block 14 are contracted in the slideway 16, when the area between the two gaps 3 on the C-shaped steel 1 reaches the position of a female die, the inner die driving block 18 descends to drive the first swing block 13 and the second swing block 14 to extend outwards, in the process, the first swing block 13 and the second swing block 14 are mutually opened under the action of the elastic element 17 until the state shown in fig. 3 is reached, at the moment, the pressure of the piston cylinder above the inner die driving block 18 is maintained, the male die 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 to the state shown in fig. 3; and then the male die is switched to the state shown in fig. 4, the pressure of a piston cylinder above the internal die driving block 18 is relieved, the male die pushes the first swing block 13 and the second swing block 14 to contract inwards, the first swing block 13 and the second swing block 14 are mutually folded under the blocking of the end part of the slideway 16 in the contraction process to be the state shown in fig. 4, when the male die reaches the state shown in fig. 4, the forming of the sinking groove 4 is finished, and finally the male die 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 located on a third swing block 23 and a fourth swing block 24, the third swing block 23 and the fourth swing block 24 are connected with the outer sliding part 20 in a swinging manner, and the swinging axes of the third swing block and the fourth swing block are collinear with the mutually attached sides of 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 mode, and the sliding direction of the outer sliding part is parallel to the direction of the angular bisector of the base angle 2 of the C-shaped steel 1; a linkage mechanism is arranged among the third swinging block 23, the fourth swinging block 24, the outer sliding part 20 and the outer die holder 26, the linkage mechanism is assembled to drive the third swinging block 23 and the fourth swinging block 24 to unfold so that the third working surface 21 and the fourth working surface 22 are switched from the working position b to the working position 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 outer sliding part 20 has the following two states when sliding 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 relative to the outer die holder 26 for a first stroke, and in the process, the third swing block 23 and the fourth swing block 24 keep the unfolding state, that is, the third working surface 21 and the fourth working surface 22 are kept at the station a; and in the second state, the outer sliding part 20 continuously slides relative to the outer die holder 26 for a second stroke, and in the process, the third swinging block 23 and the fourth swinging block 24 are folded to enable the third working surface 21 and the fourth working surface 22 to be switched from the working position a to the working position b.

As shown in fig. 9 and 10, the part of the linkage mechanism for driving the third swing block 23 and the part for driving the fourth swing block 24 are the same in 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 swing block 23 comprises a first swing link 202, a second swing link 203, a third swing link 204, a first connecting rod 205 and a second connecting rod 206, wherein the first swing link 202, the second swing link 203 are hinged with the outer sliding part 20, the third swing link 204 is hinged with a sliding block 207, when viewed along the relative swing axis direction of the third working surface 21 and the fourth working surface 22, the axle center of a hinge shaft between the first swing link 202 and the second swing link 203 as well as the outer sliding part 20, the axle center of a hinge shaft between the third swing link 204 and the sliding block 207, and the relative swing axle center of the third working surface 21 and the fourth working surface 22 are all arranged in a collinear manner, and the sliding direction of the sliding block 207 is parallel to the axle center connecting line of the hinge shafts of the first swing link 202 and the second swing link 203 on the outer sliding part 20; the first connecting rod 205 is respectively pivoted with the first swing link 202, the second swing link 203 and the third swing block 23, and the connection between the axes of the pivots of the first swing link 202 and the second swing link 203 is parallel to the axis connecting line of the hinge shafts of the first swing link 202 and the second swing link 203 on the outer sliding part 20; the second connecting rod 206 is respectively pivoted with the first swing link 202 and the third swing block 23, and a connecting line of the axle centers of the pivot between the first swing link 202 and the third swing link 23 is also parallel to a connecting line of the axle centers of the hinge shafts of the first swing link 202 and the second swing link 203 on the outer sliding part 20; the first swing link 202 and the second swing link 203 are parallel and are parallel to an axis connecting line of pivots of the first connecting rod 205 and the second connecting rod 206 on the third swing block 23; one end of the third oscillating bar 204, which is far away from the slider 207, is pivotally connected with the first oscillating bar 202 or the second oscillating bar 203, so that when the slider 207 slides relative to the outer sliding portion 20, the third oscillating block 23 can be driven to oscillate through each oscillating bar and the connecting rod, and the oscillation axis is just the relative oscillation axis between the third working surface 21 and the fourth working surface 22.

Further, as shown in fig. 10 and 11, a stop pin 209 protruding to the outside of the outer sliding portion 20 is disposed on the slider 207, a stop 262 contacting with the stop pin 209 is disposed on the outer die holder 26, when the outer sliding portion 20 slides relative to the outer die holder 26 in a direction away from the C-shaped steel 1, the stop 262 can push the stop pin 209 to slide the slider 207 relative to the outer sliding portion 20, and at this time, the slider 207 drives the third swing block 23 and the fourth swing block 24 to unfold.

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 to enable the elastic force of the first elastic unit 208 to drive the sliding block 207 to slide in a mode of driving the third swing block 23 and the fourth swing block 24 to close, a locking mechanism 25 is arranged between the sliding block 207 and the outer sliding part 20, the locking mechanism 25 is assembled to enable the sliding block 207 to be kept at the position when the sliding block 207 slides to drive the third swing block 23 and the fourth swing block 24 to open, and the locking mechanism 25 can release the sliding block 207 to enable the sliding block 207 to drive the third swing block 23 and the fourth swing block 24 to close under the action of the first elastic unit 208 when the outer sliding part 20 slides towards the direction close to the C-shaped steel 1 and enters a second stroke.

As shown in fig. 11, the locking mechanism 25 includes a locking tongue 251 disposed on the outer sliding portion 20, the locking tongue 251 is slidably connected to the outer sliding portion 20 and has a sliding direction perpendicular to the sliding direction of the sliding block 207, a second elastic unit 252 is disposed between the locking tongue 251 and the outer sliding portion 20, and the second elastic unit 252 is assembled such that an elastic force thereof can drive the arrangement to protrude on a moving path of the stopper pin 209; a slope is arranged on one side of the locking tongue 251, when the sliding block 207 drives the third swing block 23 and the fourth swing block 24 to unfold under the interaction of the stop block 262 and the stop pin 209, the stop pin 209 can push the locking tongue 251 away from the movement path of the stop pin 209 through the slope of the locking tongue 251, and after the stop pin 209 passes through the locking tongue 251, the locking tongue 251 can rebound to the movement path of the stop pin 209 under the action of the second elastic unit 252 and organize the return stroke of the stop pin 209; the locking bolt 251 is further provided with a first wedge-shaped block 253 for unlocking, the outer die holder 26 is provided with a second wedge-shaped block 261, when the outer sliding portion 20 slides towards the direction close to the C-shaped steel 1 and enters a second stroke, the first wedge-shaped block 253 is abutted against the second wedge-shaped block 261, the second wedge-shaped block 261 can push the locking bolt 251 away from a return path of the stop pin 209, and 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 fold.

Further, as shown in fig. 7 and 8, the outer sliding portion 20 is slidably disposed on a press plate 27 along a horizontal direction, the press plate 27 is movably disposed on a frame along a vertical direction, and a driving element for driving the press plate 27 to move up and down is disposed on the frame, the outer die holder 26 is movably disposed relative to the press plate 27 along the vertical direction, a third elastic unit 263 for driving the outer die holder 26 and the press plate 27 to be away from each other is disposed between the outer die holder 26 and the press plate 27, the outer die holder 26 is further provided with a horizontal extrusion surface for compressing the bottom surface of the C-shaped steel 1, and the outer sliding portion 20 is further provided with a vertical extrusion surface for compressing the side surface of the C-shaped steel 1.

The working principle of the male die is as follows: in the initial state, the pressing plate 27 and the outer die holder 26 are away from each other in the vertical direction, so that the two outer sliding portions 20 are away from each other in the horizontal direction, and the third swing block 23 and the fourth swing block 24 are in the flat state shown in fig. 2; when the area between the two gaps 3 of the C-shaped steel 1 reaches the male die, the pressing plate 27 moves upwards, and at the same time, drives the outer die holder 26 to move upwards, when the outer die holder 26 abuts against the bottom surface of the C-shaped steel 1, the outer die holder 26 stops moving upwards, the pressing plate 27 continues to move upwards to drive the two outer sliding portions 20 to be folded together, at this time, the female die is in the unfolded state shown in fig. 3, the male die and the female die are matched to flatten the bottom corner 2 of the C-shaped steel 1, then, the pressing plate 27 continues to move upwards to enable the first wedge-shaped block 253 to abut against the second wedge-shaped block 261 to push the lock tongue 251 away from the return path of the stop pin 209, at this time, the slider 207 drives the third swing block 23 and the fourth swing block 24 to be folded into the state shown in fig. 4 under the action of the first elastic unit 208, at the same time.

Example 2

A section bar comprises a strip-shaped object with a C-shaped section, which is formed by bending a steel plate, wherein concave sinking grooves 4 are arranged at the positions of bottom angles 2 of the section bar at intervals along the length direction of the strip-shaped object; the section bar is prepared by adopting the following method:

step 1: punching two parallel gaps 3 on the steel strip by using a punching die, wherein the length directions of the two gaps 3 are parallel to the width direction of the steel strip;

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 midline of the gap 3;

and step 3: the folded angle between the two gaps 3 is folded inwards by using the local forming device in the embodiment 1 to form the sinking groove 4; during forming, the bottom corner 2 between the two gaps 3 is firstly flattened, then the bottom surface and the side surface of the bottom corner 2 are turned inwards along the crease of the original bottom corner 2, and the turning angles of the bottom surface and the side surface are both 90 degrees.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. The utility model provides a local forming device of C shaped steel for become inside sunken heavy groove (4) with local base angle (2) shaping of C shaped steel (1), wherein be equipped with gap (3) that punch out in advance between the other region of local base angle (2) and base angle (2), its characterized in that: the die comprises a female die and a male die, wherein 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 edges which are mutually attached, the first working surface (11) and the second working surface (12) form relative pivoting fit by taking the edges which are mutually attached as axes, the first working surface (11) and the second working surface (12) swing relatively to switch between a first station and a second station, the first working surface (11) and the second working surface (12) are coplanar in the first station state, and the first working surface (11) and the second working surface (12) form a V-shaped groove with an included angle in the second station state; 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 a first working position 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 a second working position when the area of the hinge axis of the first working surface (11) and the second working surface (12) 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 edges which are attached to each other, the third working surface (21) and the fourth working surface (22) are in relative pivot joint matching by taking the edges which are attached to each other as axes, the third working surface (21) and the fourth working surface (22) swing relatively 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 the state of the station a, and the third working surface (21) and the fourth working surface (22) form a V-shaped protrusion with an included angle in the state of the station b; when in molding, the female die is positioned on the inner side of the bottom angle (2) of the C-shaped steel (1), the male die is positioned on the outer side of the bottom angle (2) of the C-shaped steel (1), when the first working surface (11) and the second working surface (12) are positioned at a station, the third working surface (21) and the fourth working surface (22) are positioned at a station a, at the moment, the first working surface (11) and the second working surface (12) are obliquely and oppositely arranged with the inner side of the bottom angle (2) of the C-shaped steel (1), the third working surface (21) and the fourth working surface (22) are obliquely and oppositely arranged with the outer side of the bottom angle (2) of the C-shaped steel (1), and the female die and the male die are mutually matched for flattening the local bottom angle (2); when the first working surface (11) and the second working surface (12) are located at the second station, the third working surface (21) and the fourth working surface (22) are located at the second station, at the moment, the first working surface (11) and the second working surface (12) are perpendicular to the bottom surface and the side surface of the C-shaped steel (1) respectively, the third working surface (21) and the fourth working surface (22) are perpendicular to the bottom surface and the side surface of the C-shaped steel (1) respectively, 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 the moment, the female die and the male die are matched with each other to punch the flattened local bottom angle (2) into the concave sinking groove (4) for the second time.

2. The partial forming apparatus of C-shaped steel according to claim 1, wherein: the first working surface (11) and the second working surface (12) are respectively positioned on a first swing block (13) and a second swing block (14), the first swing block (13) and the second swing 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 of the inner sliding part is parallel to the bisector direction of the bottom angle (2) of the C-shaped steel (1); the first swing block (13) and the second swing block (14) both comprise a body with a right-angled triangle cross section and a connecting part convexly arranged along the normal direction of one right-angled side of the body, the first working surface (11) and the second working surface (12) are respectively surfaces corresponding to inclined surfaces of the cross sections of the two bodies, an arc-shaped groove and an arc-shaped convex strip which are in sliding fit with each other are respectively arranged on the connecting part and the inner sliding part (15), and the arc centers of the arc-shaped groove and the arc-shaped convex strip are positioned on the hinge axis 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 further provided with a first splicing surface (101) and a second splicing surface (102) which are respectively up 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 arranged adjacent to the two 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 along with the inner sliding part (15) and in the slide way (16), the first working surface (11) is parallel and level with the first splicing surface (101), the second working surface (12) is parallel and level with 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).

3. The partial forming apparatus of C-shaped steel according to claim 2, wherein: an elastic element (17) is arranged between the first swing block (13) and the inner die holder (10), when the first swing block (13) and the second swing block (14) protrude to the outer side of the slide way (16), the first swing block (13) and the second swing block (14) can enable the first working surface (11) and the second working surface (12) to be kept at a first station under the elastic force action of the elastic element (17), and when the first swing block (13) and the second swing block (14) slide towards the slide way (16) along with the inner die holder (10), the first swing block (13) and the second swing 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; the elastic element (17) is two tension springs respectively arranged between the inner sliding part (15) and the first swing block (13) and between the inner sliding part (15) and the second swing block (14).

4. The partial forming apparatus of C-shaped steel according to claim 3, wherein: the inner die holder (10) is fixedly connected with the rack, an inner die driving block (18) is further arranged on the rack, the inner die driving block (18) is connected with the rack in a sliding mode along the vertical direction, a driving element for driving the inner die driving block (18) to slide up and down is arranged on the rack, a horizontal kidney-shaped hole is formed in the inner die driving block (18), a pin is arranged on the inner sliding portion (15), and the pin is in sliding fit with the horizontal kidney-shaped hole, so that the inner sliding portion (15) can be driven to slide in the slide way (16) when the inner die driving block (18) slides up and down; and the inner die holder (10) is also provided with a horizontal positioning surface and a vertical positioning surface which are respectively abutted against the bottom surface and the side surface of the C-shaped steel (1).

5. The partial forming apparatus of C-shaped steel according to claim 1, wherein: the third working surface (21) and the fourth working surface (22) are respectively positioned on a third swing block (23) and a fourth swing block (24), the third swing block (23) and the fourth swing block (24) are connected with the outer sliding part (20) in a swinging mode, and the swinging axes of the third swing block and the fourth swing block are collinear with the mutually jointed edges of 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 mode, and the sliding direction of the outer sliding part is parallel to the angular bisector direction of the bottom angle (2) of the C-shaped steel (1); and a linkage mechanism is arranged among the third swinging block (23), the fourth swinging block (24), the outer sliding part (20) and the outer die holder (26), the linkage mechanism is assembled to drive the third swinging block (23) and the fourth swinging block (24) to be unfolded to enable the third working surface (21) and the fourth working surface (22) to be switched to a working position a from a working position b when the outer sliding part (20) slides relative to the outer die holder (26) in a direction far 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 a 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 unfolding state, namely the third working surface (21) and the fourth working surface (22) are kept at a station a; and in the second state, the outer sliding part (20) continuously slides 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 folded to enable the third working surface (21) and the fourth working surface (22) to be switched from the working position a to the working position b.

6. The partial forming apparatus of C-shaped steel according to claim 5, wherein: the part of the linkage mechanism for driving the third swing block (23) and the part of the linkage mechanism for driving the fourth swing block (24) are the same in structure and are symmetrically arranged relative to a bisector between the third working surface (21) and the fourth working surface (22); wherein the part for driving the third swing block (23) comprises a first swing link (202), a second swing link (203), a third swing link (204), a first connecting rod (205) and a second connecting rod (206), wherein the first swing rod (202), the second swing rod (203) are hinged with the outer sliding part (20), the third swing rod (204) is hinged with a sliding block (207), and the axle center of a hinge shaft between the first swing rod (202), the second swing rod (203) and the outer sliding part (20), the axle center of a hinge shaft between the third swing rod (204) and the sliding block (207) and the relative swinging axle center of the third working surface (21) and the fourth working surface (22) are arranged in a collinear way when viewed along the relative swinging axial direction of the third working surface (21) and the fourth working surface (22), the sliding direction of the sliding block (207) is parallel to the axis connecting line of the hinged shafts of the first swing rod (202) and the second swing rod (203) on the outer sliding part (20); the first connecting rod (205) is respectively pivoted with the first swing rod (202), the second swing rod (203) and the third swing block (23), and the connection between the first connecting rod and the third swing rod and the pivot axes of the first swing rod (202) and the second swing rod (203) is parallel to the axis connecting line of the hinged shafts of the first swing rod (202) and the second swing rod (203) on the outer sliding part (20); the second connecting rod (206) is respectively pivoted with the first swing rod (202) and the third swing block (23), and is also parallel to the axis connecting line of the hinging shafts of the first swing rod (202) and the second swing rod (203) on the outer sliding part (20) with the axis connecting line of the pivot between the first swing rod and the third swing block; the first swing rod (202) and the second swing rod (203) are parallel and are parallel to the axis connecting line of the pivots of the first connecting rod (205) and the second connecting rod (206) on the third swing block (23); one 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 sliding block (207) can drive the third swing block (23) to swing through the swing rods and the connecting rod when sliding 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).

7. The partial forming apparatus of C-shaped steel according to claim 6, wherein: the sliding block (207) is provided with a stop pin (209) protruding to the outer side of the outer sliding portion (20), the outer die holder (26) is provided with a stop block (262) connected with the stop pin (209), when the outer sliding portion (20) slides relative to the outer die holder (26) in the direction away from the C-shaped steel (1), the stop block (262) can push the stop pin (209) to enable the sliding block (207) to slide relative to the outer sliding portion (20), and at the moment, the sliding block (207) drives the third swinging block (23) and the fourth swinging block (24) to unfold.

8. The partial forming apparatus of C-shaped steel according to claim 7, wherein: 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 to enable the elastic force of the first elastic unit to drive the sliding block (207) to slide in a mode of driving the third swing block (23) and the fourth swing 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 to enable the sliding block (207) to be kept at the station when the sliding block (207) slides to drive the third swing block (23) and the fourth swing block (24) to be unfolded, and when the outer sliding part (20) slides towards the direction close to the C-shaped steel (1) and enters a second stroke, the locking mechanism (25) can release the sliding block (207) to enable the sliding block (207) to drive the third swing block (23) and the fourth swing block (24) to be folded under the action of the first elastic unit (208).

9. The partial forming apparatus of C-shaped steel according to claim 8, wherein: the locking mechanism (25) comprises a locking tongue (251) arranged on the outer sliding part (20), the locking tongue (251) is connected with the outer sliding part (20) in a sliding mode, the sliding direction of the locking tongue (251) is perpendicular to that of the sliding block (207), a second elastic unit (252) is arranged between the locking tongue (251) and the outer sliding part (20), and the second elastic unit (252) is assembled in a mode that the elastic force of the second elastic unit can drive the locking tongue (251) to be arranged and protrude on the moving path of the stop pin (209); one side of the lock tongue (251) is provided with a slope, when the sliding block (207) drives the third swing block (23) and the fourth swing block (24) to unfold under the interaction of the stop block (262) and the stop pin (209), the stop pin (209) can push the lock tongue (251) away from the movement path of the stop pin (209) through the slope of the lock tongue (251), and after the stop pin (209) passes through the lock tongue (251), the lock tongue (251) can rebound to the movement path of the stop pin (209) under the action of the second elastic unit (252) and organize the return stroke of the stop pin (209); still be equipped with first wedge (253) that are used for the unblock on spring bolt (251), be equipped with second wedge (261) on the die holder (26), when outer sliding part (20) slide to the direction that is close to C shaped steel (1) and get into the second stroke first wedge (253) contradict with second wedge (261) and second wedge (261) can push away spring bolt (251) from the return route of backing pin (209), make slider (207) can slide under the effect of first elastic element (208) in order to drive third pendulum (23) and fourth pendulum (24) and fold.

10. The partial forming apparatus of C-shaped steel according to claim 9, wherein: outer sliding part (20) slide along the horizontal direction and set up on a clamp plate (27), clamp plate (27) set up in the frame and be equipped with the drive element who is used for driving clamp plate (27) up-and-down motion in the frame along vertical direction activity, outer die holder (26) set up along vertical direction and clamp plate (27) relative activity, and be equipped with between outer die holder (26) and clamp plate (27) and be used for driving third elastic unit (263) that both kept away from each other, still be equipped with the horizontal extrusion face that is used for compressing tightly C shaped steel (1) bottom surface on outer die holder (26), still be equipped with the vertical extrusion face that is used for compressing tightly C shaped steel (1) side on outer sliding part (20).