CN215543969U - Automobile front door guide groove pre-forming equipment - Google Patents

Abstract

The utility model relates to a pre-forming device for a front door guide groove of an automobile. The automobile front door guide groove pre-piece forming equipment comprises a rack, wherein a rack panel is flatly arranged on the rack, and a main bending part is arranged on the rack panel; the main bending part comprises a first bending mechanism and a second bending mechanism arranged on the first bending mechanism; the second stretch bending mechanism including set up in the crooked hydro-cylinder of the below of the face of putting on the shelf of frame and set up the stretch bending bottom plate above the frame panel, the piston rod parallel stretch bending bottom plate of crooked hydro-cylinder arranges, the face that stretch bending bottom plate inboard runs through the stretch bending bottom plate perpendicularly is provided with the center pin, it sets up the swivel mount to lie in the last face of stretch bending bottom plate on the center pin, it has the center cover to overlap on the lower face of the bottom plate that lies in the stretch bending on the center pin, it has the swing arm to lie in the below of center cover and articulate on the center pin, the below that lies in the swing arm on the center pin sets up the axle sleeve, the overhang end of swing arm articulates there is the swing arm axle, the lower part of swing arm axle articulates there is the stretch bending hydro-cylinder joint.

Description

Automobile front door guide groove pre-forming equipment

Technical Field

The utility model belongs to the technical field of automobile part production and manufacturing, and particularly relates to an automobile front door guide groove pre-forming device.

Background

The automobile front door guide groove is a front guide groove structure in a window glass lifting system on an automobile front door window. The automobile front door guide groove is an important process in the machining and forming stage, namely, the automobile front door guide groove prefabricated part is subjected to stretch bending forming, and the automobile front door guide groove subjected to stretch bending forming is cut to obtain a semi-finished product of the automobile front door guide groove. The existing automobile front door guide groove pre-piece forming structure is directly carried out by adopting a traditional stretch bender, the product process is rough, the production efficiency is limited, and the obtained effective product rate needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide the automobile front door guide groove pre-piece forming equipment, which realizes the high-efficiency and stable stretch bending forming of the automobile front door guide groove pre-piece, has high production efficiency and high effective product rate, and greatly improves the productivity.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a pre-piece forming device for a front door guide groove of an automobile comprises a rack, wherein a rack panel is flatly arranged on the rack, and a main bending part is arranged on the rack panel;

the main bending part comprises a first bending mechanism and a second bending mechanism arranged on the first bending mechanism;

the second stretch bending mechanism comprises a bending oil cylinder arranged below the upper frame surface of the frame and a stretch bending bottom plate arranged above a panel of the frame, a piston rod of the bending oil cylinder is arranged in parallel with the stretch bending bottom plate, a central shaft is arranged on the inner side of the stretch bending bottom plate and vertically penetrates through the surface of the stretch bending bottom plate, a rotating sleeve is arranged on the central shaft and positioned on the upper surface of the stretch bending bottom plate, a central sleeve is sleeved on the lower surface of the stretch bending bottom plate on the central shaft, a swing arm is hinged on the central shaft and positioned below the central sleeve, a shaft sleeve is arranged on the central shaft and positioned below the swing arm, a swing arm shaft is hinged at the overhanging end of the swing arm, a stretch bending oil cylinder joint is hinged at the lower part of the swing arm shaft, a piston rod end of the bending oil cylinder is connected with the stretch bending oil cylinder joint, and the swing arm shaft is arranged in parallel with the central shaft; a stretching oil cylinder frame is arranged on the outer side of the stretch bending bottom plate, a stretching oil cylinder is arranged on the stretching oil cylinder frame, a piston rod of the stretching oil cylinder extends inwards along the length direction of the stretch bending bottom plate, a limiting seat is arranged between the rotary sleeve and the stretching oil cylinder frame, a sliding groove is arranged on the limiting seat along the length direction of the stretch bending bottom plate, a material clamping frame is arranged on the sliding groove, a material clamping opening of the material clamping frame faces towards the inner side of the stretch bending bottom plate, a material clamping opening of the material clamping frame is higher than the upper end of the central shaft, a piston rod of the stretching oil cylinder is fixedly connected with the material clamping frame and drives the material clamping frame to move back and forth along the length direction of the sliding groove, a touch switch is arranged on the inner wall of the material clamping opening of the material clamping frame, lower stop blocks are arranged on two sides of the lower portion of the material clamping frame, upper stop blocks are arranged on the lower stop blocks on the lower side, a lower jaw is arranged on the lower side of the lower jaw, a clamping oil cylinder is arranged on the upper portion of the material clamping frame, and a piston rod of the clamping oil cylinder is connected with the upper jaw, the piston rod of the clamping oil cylinder stretches and retracts to drive the upper jaw to move up and down relative to the lower jaw;

the first stretch bending mechanism comprises a base plate arranged on the panel of the rack and a pressing oil cylinder arranged below the upper rack surface of the rack, the pressing oil cylinder is arranged perpendicular to the panel of the rack, and a piston rod of the pressing oil cylinder is arranged upwards; a female die bottom plate is arranged above the base plate, a female die is arranged above the female die bottom plate, a strip-shaped inverted ladder groove is arranged on the female die along the plate length direction of the stretch bending bottom plate of the second stretch bending mechanism, and the strip-shaped inverted ladder groove is aligned to the lower jaw; a material pressing plate is arranged above the female die, a support core is arranged on the lower plate surface of the material pressing plate, the support core is positioned right above the strip-shaped inverted ladder groove, and the core shape of the support core is consistent with the groove shape of the strip-shaped inverted ladder groove; the side that the higher authority of frame panel is located the backing plate sets up the rocker base, and the higher authority of rocker base sets up articulated seat, and articulated on the articulated seat have a swing span, the swing span including the two triangular supports that the symmetry set up, two triangular supports all arrange along the vertical direction in bar groove of falling the ladder, set up the rotation axis between two triangular supports, the below apex angle of triangular support with articulated seat articulated, set up the rocker front end plate on the inboard apex angle in the top both sides apex angle of triangular support and the piston rod end hinge of the pressure cylinder, the outside apex angle, the pressure flitch set up in the rocker front end plate on.

Furthermore, the side surface of the frame is fixedly provided with an auxiliary bending part; the first stretch bending mechanism is arranged close to the auxiliary stretch bending part, the auxiliary stretch bending part comprises a supporting suspension frame arranged along the frame length direction of the upper frame surface of the rack, a supporting inclined frame is arranged on the upper frame surface of the supporting suspension frame, a supporting jacking cylinder is arranged on the inner side of the supporting inclined frame on the upper frame surface of the supporting suspension frame, a jacking rod of the supporting jacking cylinder stretches upwards, and a rod end of the jacking rod of the supporting jacking cylinder is provided with a supporting limiting claw.

Preferably, the tail end of the bending oil cylinder is provided with a hinge frame, the tail end of the bending oil cylinder is hinged in the bending oil cylinder frame of the hinge frame through a pin shaft, a locking plate is arranged on the pin shaft, the pin shaft is arranged in parallel with the central shaft, a bending oil cylinder bottom plate is arranged on the bending oil cylinder frame, a strip-shaped hole is formed in the bending oil cylinder bottom plate along the arrangement direction of the bending oil cylinder, a fastening nut is arranged on the strip-shaped hole, and the oil cylinder bottom plate is fixedly connected with the lower portion of the upper portion of the rack.

Preferably, the upper cylinder body of the pressing oil cylinder is connected with a pressing frame side plate, a pressing frame bottom plate is fixedly arranged on the upper side of the pressing frame side plate, and the pressing frame bottom plate is fixedly connected with the lower surface of the upper frame surface of the frame.

Further preferably, the bottom of the rack is provided with a machine foot screw, a reinforcing fastening sleeve is arranged between the upper end of the machine foot screw and the bottom surface of the rack, and the lower end of the machine foot screw is fastened with a machine foot base.

Preferably, the top angle of the inner side is hinged with a pressing oil cylinder joint in a rotating mode, and the piston rod end of the pressing oil cylinder is fixedly connected with the pressing oil cylinder joint.

Further preferably, the upper plate surface of the female die bottom plate is perpendicular to the bar-shaped inverted ladder groove, a limiting convex block is arranged below the female die, and a locking unit is arranged on the limiting convex block and between the limiting convex block and the limiting concave groove.

The utility model has the technical effects that: the automobile front door guide groove prefabricated part is arranged on a rack panel of a rack, specifically, a piston rod of a pressing oil cylinder on a first stretch bending mechanism retracts, a hinged seat on a swing frame base is used as a rotating fulcrum, and a swing frame front end plate on a swing frame is lifted to drive a material pressing plate to turn up; and the piston rod of the clamping oil cylinder on the second bending mechanism retracts, the piston rod of the stretching oil cylinder retracts, the automobile front door guide groove prefabricated part is arranged in the strip-shaped inverted ladder groove of the female die on the first bending mechanism, the bending section of the automobile front door guide groove prefabricated part is arranged on a lower jaw between lower stop blocks of a clamping port of a clamping frame of the second bending mechanism, the end part of the bending section of the automobile front door guide groove prefabricated part is limited by the lower stop block and an upper stop block, the piston rod of the stretching oil cylinder extends out to drive the clamping frame to translate along a limiting seat until the end part of the bending section of the automobile front door guide groove prefabricated part contacts a touch switch of the inner wall of the clamping port of the clamping frame, the piston rod of the stretching oil cylinder stops extending out, and simultaneously, the piston rod of the clamping oil cylinder extends out to drive the upper stop and move downwards to form the clamping of the end part of the bending section of the automobile front door guide groove prefabricated part, thus, the primary locking of the automobile front door guide groove prefabricated part is formed, meanwhile, a piston rod of the pressing oil cylinder extends out, a hinged seat on a swing frame base is also used as a rotating fulcrum to drive a material pressing plate on a front end plate of the swing frame to press downwards, and due to the action of a supporting core, the automobile front door guide groove prefabricated part is effectively and stably clamped on the first stretch bending mechanism to form secondary locking of the automobile front door guide groove prefabricated part, so that the automobile front door guide groove prefabricated part is firmly locked due to the common synchronous action of the second stretch bending machine and the first stretch bending machine; meanwhile, a piston rod of the bending oil cylinder stretches and retracts to drive the swing arm to swing, so that the stretch bending bottom plate on the central shaft is driven to rotate, high-efficiency and stable stretch bending forming of the automobile front door guide groove prefabricated part is achieved, production efficiency is high, the effective product rate is high, and productivity is greatly improved. In practice, the stretch-bending portion may be stretch-bent against the central axis of the rotating sleeve. And (4) after the stretch bending process, namely performing the next cutting process after the pre-formed piece of the automobile front door guide groove is stretch bent and formed, and obtaining a semi-finished product of the automobile front door guide groove.

Drawings

FIG. 1 is a perspective view of a first embodiment of the present invention;

FIG. 2 is a front view structural diagram of a second embodiment of the present invention;

FIG. 3 is a perspective view of the second stretch bending mechanism of FIG. 1;

fig. 4 is a perspective view of the first stretch bending mechanism in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to figures 1, 3 and 4, a first embodiment of the utility model: a pre-piece forming device for an automobile front door guide groove comprises a rack 36, wherein a rack panel 37 is flatly arranged on the rack 36, and a main bending part is arranged on the rack panel 37;

the main bending part comprises a first bending mechanism and a second bending mechanism arranged on the first bending mechanism;

the second stretch bending mechanism comprises a bending oil cylinder 33 arranged below the upper frame surface of the frame 36 and a stretch bending bottom plate 13 arranged above a frame panel 37, a piston rod of the bending oil cylinder 33 is arranged in parallel with the stretch bending bottom plate 13, a central shaft 15 vertically penetrates through the surface of the stretch bending bottom plate 13 at the inner side of the stretch bending bottom plate 13, a rotating sleeve 14 is arranged on the upper surface of the stretch bending bottom plate 13 on the central shaft 15, a central sleeve 16 is sleeved on the lower surface of the stretch bending bottom plate 13 on the central shaft 15, a swing arm 17 is hinged below the central sleeve 16 on the central shaft 15, a shaft sleeve 18 is arranged below the swing arm 17 on the central shaft 15, a swing arm shaft 20 is hinged at the overhanging end of the swing arm 17, and a stretch bending oil cylinder joint 19 is hinged at the lower part of the swing arm shaft 20, the piston rod end of the bending oil cylinder 33 is connected with a stretch bending oil cylinder joint 19, and the swing arm shaft 20 is arranged in parallel with the central shaft 15; a stretching oil cylinder frame 21 is arranged on the outer side of the stretch bending bottom plate 13, a stretching oil cylinder 39 is arranged on the stretching oil cylinder frame 21, a piston rod of the stretching oil cylinder 39 extends inwards along the plate length direction of the stretch bending bottom plate 13, a limiting seat 22 is arranged between the rotary sleeve 14 and the stretching oil cylinder frame 21, a sliding groove is arranged on the limiting seat 22 along the plate length direction of the stretch bending bottom plate 13, a material clamping frame 23 is arranged on the sliding groove, a material clamping opening of the material clamping frame 23 faces the inner side of the stretch bending bottom plate 13, a material clamping opening of the material clamping frame 23 is higher than the upper end of the central shaft 15, the piston rod of the stretching oil cylinder 39 is fixedly connected with the material clamping frame 23 and drives the material clamping frame 23 to move back and forth along the groove length direction of the sliding groove, a trigger switch is arranged on the inner wall of the material clamping opening of the material clamping frame 23, lower stop blocks 25 are arranged on two sides of the material clamping opening of the material clamping frame 23, an upper stop block 28 is arranged on the lower stop block 25, a lower jaw 24 is arranged between the lower stop blocks 25, an upper stop jaw 26 is arranged right above the lower stop jaw 24, a clamping oil cylinder 27 is arranged above the material clamping frame 23, a piston rod of the clamping oil cylinder 27 is connected with the upper jaw 26, and the upper jaw 26 is driven by the extension and contraction of the piston rod of the clamping oil cylinder 27 to move up and down relative to the lower jaw 24;

the first stretch bending mechanism comprises a cushion plate 9 arranged on a rack panel 37 and a pressing oil cylinder 38 arranged below the upper rack surface of the rack 36, wherein the pressing oil cylinder 38 is arranged vertical to the rack panel 37, and a piston rod of the pressing oil cylinder 38 is arranged upwards; a female die bottom plate 10 is arranged above the backing plate 9, a female die 11 is arranged above the female die bottom plate 10, a strip-shaped inverted ladder groove is arranged on the female die 11 along the plate length direction of a stretch bending bottom plate 13 of the second stretch bending mechanism, and the strip-shaped inverted ladder groove is aligned with the lower jaw 24; a pressure plate 8 is arranged above the female die 11, a support core 12 is arranged on the lower plate surface of the pressure plate 8, the support core 12 is positioned right above the strip-shaped inverted ladder groove, and the core shape of the support core 12 is consistent with the groove shape of the strip-shaped inverted ladder groove; the side that the higher authority of frame panel 37 is located backing plate 9 sets up rocker base 3, and the higher authority of rocker base 3 sets up articulated seat, and articulated on the articulated seat have a swing span 4, swing span 4 including the two tripods that the symmetry set up, two tripods all arrange along the vertical direction in bar groove of falling the ladder, set up rotation axis 5 between two tripods, the below apex angle of tripod with articulated seat articulated, set up rocker front end plate 7 on the inboard apex angle in the top both sides apex angle of tripod and the piston rod end of clamping cylinder 38 articulated, the outside apex angle, pressure flitch 8 set up in rocker front end plate 7 on.

In fig. 1, the automobile front door guide slot preform is placed on a rack panel 37 of a rack 36, specifically, a piston rod of a pressing cylinder 38 on a first stretch bending mechanism retracts, a hinged seat on a swing frame base 3 is used as a rotation fulcrum, a swing frame front end plate 7 on a swing frame 4 is lifted, and a material pressing plate 8 is driven to turn up; and the piston rod of the clamping cylinder 27 on the second stretch bending mechanism retracts, the piston rod of the stretching cylinder 39 retracts, the automobile front door guide groove prefabricated part is arranged in the strip-shaped inverted ladder groove of the upper female die 11 of the first stretch bending mechanism, the stretch bending section of the automobile front door guide groove prefabricated part is arranged on the lower jaw 24 between the lower stop blocks 25 of the material clamping opening of the material clamping frame 23 of the second stretch bending mechanism, the end part of the stretch bending section of the automobile front door guide groove prefabricated part is limited by the lower stop blocks 25 and the upper stop blocks 28, the piston rod of the stretching cylinder 39 extends out to drive the material clamping frame 23 to translate along the limiting seat 22 until the end part of the stretch bending section of the automobile front door guide groove prefabricated part contacts the touch switch of the inner wall of the material clamping opening of the material clamping frame 23, the piston rod of the stretching cylinder 39 stops extending, meanwhile, the piston rod of the clamping cylinder 27 extends out to drive the upper jaw 26 to move downwards to form the clamping of the end part of the stretch bending section of the automobile front door guide groove prefabricated part, the pre-piece of the automobile front door guide groove is locked once, meanwhile, a piston rod of the pressing oil cylinder 38 extends out, a hinged seat on the swing frame base 3 is also used as a rotating fulcrum to drive the material pressing plate 8 on the swing frame front end plate 7 to press downwards, and the pre-piece of the automobile front door guide groove is effectively and stably clamped on the first stretch bending mechanism under the action of the supporting core 12 to lock the pre-piece of the automobile front door guide groove for the second time, so that the pre-piece of the automobile front door guide groove is firmly locked under the common synchronous action of the second stretch bending machine and the first stretch bending machine; meanwhile, a piston rod of the bending oil cylinder 33 stretches and retracts to drive the swing arm 17 to swing, so that the stretch bending bottom plate 13 on the central shaft 15 is driven to rotate, efficient and stable stretch bending forming of the automobile front door guide groove prefabricated part is achieved, production efficiency is high, the effective product rate is high, and productivity is greatly improved. Referring to fig. 3, in practice, the stretch-bending portion may be stretch-bent against the central shaft 15 of the rotary sleeve 14. And (4) after the stretch bending process, namely performing the next cutting process after the pre-formed piece of the automobile front door guide groove is stretch bent and formed, and obtaining a semi-finished product of the automobile front door guide groove.

Further, with reference to fig. 2, a second embodiment of the present invention: the side surface of the frame 36 is fixedly provided with an auxiliary bending part; the first stretch bending mechanism is arranged close to the auxiliary stretch bending part, the auxiliary stretch bending part comprises a supporting suspension 40 arranged along the frame length direction of the upper frame surface of the frame 36, a supporting inclined frame 41 is arranged on the upper frame surface of the supporting suspension 40, a supporting jacking cylinder 42 is arranged on the inner side of the supporting inclined frame 41 on the upper frame surface of the supporting suspension 40, a jacking rod of the supporting jacking cylinder 42 extends upwards, and a supporting limiting claw 43 is arranged at the rod end of the jacking rod of the supporting jacking cylinder 42.

In the embodiment, the auxiliary bending part is arranged to perform auxiliary locking on the overhanging end of the automobile front door guide groove prefabricated part, namely the supporting and limiting of the supporting inclined frame 41 are performed, and the supporting and jacking cylinder 42 pushes the supporting and limiting claw 43 to the equal-height locking position of the first bending mechanism and the second bending mechanism, so that the first bending mechanism and the second bending mechanism are better matched, and the bending forming is more stably and effectively completed.

Preferably, a hinge frame is arranged at the tail end of the bending oil cylinder 33, the tail end of the bending oil cylinder 33 is hinged in a bending oil cylinder frame 31 of the hinge frame through a pin shaft 32, a locking plate is arranged on the pin shaft 32, the pin shaft 32 is arranged in parallel with the central shaft 15, a bending oil cylinder bottom plate 29 is arranged on the bending oil cylinder frame 31, a strip-shaped hole is formed in the bending oil cylinder bottom plate 29 along the arrangement direction of the bending oil cylinder 33, a fastening nut 30 is arranged on the strip-shaped hole, and the oil cylinder bottom plate 29 is fixedly connected with the lower portion of the upper portion of the frame 36.

Therefore, the stretch bending driving mechanism of the second stretch bending mechanism can drive the stretch bending bottom plate 13 to move more stably and smoothly, the stretch bending driving mechanism of the second stretch bending mechanism is limited in the direction of the rotating plane, and can be adjusted along with the stretch bending force on the rotating plane, namely, the over-rotation on the rotating plane is buffered, and the work per se is more stable.

Further preferably, the upper cylinder body of the pressing cylinder 38 is connected with a pressing frame side plate 2, a pressing frame bottom plate 1 is fixedly arranged on the upper side of the pressing frame side plate 2, and the pressing frame bottom plate 1 is fixedly connected with the lower surface of the upper frame surface of the frame 36.

Thus, the locking driving mechanism of the first stretch bending mechanism is smoothly arranged. Therefore, the locking driving mechanism of the first stretch bending mechanism acts more stably, and the stability and effectiveness of the work of the first stretch bending mechanism are guaranteed.

More preferably, a foot screw 35 is disposed at the bottom of the frame 36, a reinforcing fastening sleeve is disposed between the upper end of the foot screw 35 and the bottom surface of the frame 36, and a foot base 34 is fastened to the lower end of the foot screw 35.

The foot base 34 effectively supports and buffers the working action on the frame 36, and further ensures the high-strength, stable and effective work of the automobile front door guide groove pre-piece stretch bending molding.

Further preferably, the inner vertex angle is rotatably and hingedly provided with a pressing oil cylinder joint 6, and a piston rod end of the pressing oil cylinder 38 is fixedly connected with the pressing oil cylinder joint 6. Thus, the hinge connection between the hold-down cylinder 38 and the swing frame 4 is stable, and the drive of the extension and contraction of the piston rod of the hold-down cylinder 38 is more stable.

Further preferably, the upper plate surface of the female die bottom plate 10 is perpendicular to the bar-shaped inverted ladder groove, a limiting convex block is arranged below the female die 11, and a locking unit is arranged on the limiting convex block and between the limiting convex block and the limiting concave groove. Therefore, the assembly between the die base plate 10 and the die 11 is more direct, simple and convenient, adjustable and stable after adjustment.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof.

Claims (7)

1. The utility model provides a car qianmen guide slot preforming former, includes frame (36), and the higher authority of frame (36) is the tie has frame panel (37), is provided with the main portion of bending that draws on frame panel (37), its characterized in that:

the main bending part comprises a first bending mechanism and a second bending mechanism arranged on the first bending mechanism;

the second stretch bending mechanism comprises a bending oil cylinder (33) arranged below the upper frame surface of the frame (36) and a stretch bending bottom plate (13) arranged above a frame panel (37), a piston rod of the bending oil cylinder (33) is arranged in parallel with the stretch bending bottom plate (13), a central shaft (15) is arranged on the inner side of the stretch bending bottom plate (13) and vertically penetrates through the surface of the stretch bending bottom plate (13), a rotating sleeve (14) is arranged on the upper surface of the stretch bending bottom plate (13) on the central shaft (15), a central sleeve (16) is sleeved on the lower surface of the stretch bending bottom plate (13) on the central shaft (15), a swing arm (17) is hinged on the central shaft (15) below the central sleeve (16), a shaft sleeve (18) is arranged on the central shaft (15) below the swing arm (17), a swing arm shaft (20) is hinged on the overhanging end of the swing arm (17), and a stretch bending oil cylinder joint (19) is hinged on the lower part of the swing arm shaft (20), the piston rod end of the bending oil cylinder (33) is connected with a bending oil cylinder joint (19), and the swing arm shaft (20) is arranged in parallel with the central shaft (15); a stretching oil cylinder frame (21) is arranged on the outer side of the stretch bending bottom plate (13), a stretching oil cylinder (39) is arranged on the stretching oil cylinder frame (21), a piston rod of the stretching oil cylinder (39) extends inwards along the plate length direction of the stretch bending bottom plate (13), a limiting seat (22) is arranged between the rotary sleeve (14) and the stretching oil cylinder frame (21), a sliding groove is formed in the limiting seat (22) along the plate length direction of the stretch bending bottom plate (13), a material clamping frame (23) is arranged on the sliding groove, a material clamping opening of the material clamping frame (23) faces towards the inner side of the stretch bending bottom plate (13), a material clamping opening of the material clamping frame (23) is higher than the upper end of the central shaft (15), the piston rod of the stretching oil cylinder (39) is fixedly connected with the material clamping frame (23) and drives the material clamping frame (23) to move back and forth along the groove length direction of the sliding groove, a touch switch is arranged on the inner wall of the material clamping frame (23), and lower stop blocks (25) are arranged on two sides of the lower portion of the material clamping opening of the material clamping frame (23), an upper stop block (28) is arranged on the lower stop block (25), a lower jaw (24) is arranged between the lower stop blocks (25) on two sides, an upper jaw (26) is arranged right above the lower jaw (24), a clamping cylinder (27) is arranged above the material clamping frame (23), a piston rod of the clamping cylinder (27) is connected with the upper jaw (26), and the upper jaw (26) can move up and down relative to the lower jaw (24) under the driving of the extension of the piston rod of the clamping cylinder (27);

the first stretch bending mechanism comprises a cushion plate (9) arranged on a rack panel (37) and a pressing oil cylinder (38) arranged below the upper rack surface of a rack (36), wherein the pressing oil cylinder (38) is arranged vertical to the rack panel (37), and a piston rod of the pressing oil cylinder (38) is arranged upwards; a female die bottom plate (10) is arranged above the backing plate (9), a female die (11) is arranged above the female die bottom plate (10), a strip-shaped inverted ladder groove is arranged on the female die (11) along the plate length direction of a stretch bending bottom plate (13) of the second stretch bending mechanism, and the strip-shaped inverted ladder groove is aligned to the lower jaw (24); a pressure plate (8) is arranged above the female die (11), a support core (12) is arranged on the lower plate surface of the pressure plate (8), the support core (12) is positioned right above the strip-shaped inverted ladder groove, and the core type of the support core (12) is consistent with the groove type of the strip-shaped inverted ladder groove; the side that the higher authority of frame panel (37) is located backing plate (9) sets up rocker base (3), and the higher authority of rocker base (3) sets up articulated seat, and articulated on the articulated seat have swing span (4), swing span (4) including two triangular supports that the symmetry set up, two triangular supports all arrange along the perpendicular direction in bar falling ladder groove, set up rotation axis (5) between two triangular supports, the below apex angle of tripod with articulated seat articulated, set up rocker front end plate (7) on the inboard apex angle in the top both sides apex angle of tripod and the piston rod end of compressing cylinder (38) articulated, the outside apex angle, pressure flitch (8) set up in rocker front end plate (7) on.

2. The apparatus for forming a pre-fabricated part of a front door guide of an automobile according to claim 1, wherein: the side surface of the frame (36) is fixedly provided with an auxiliary bending part; the first stretch bending mechanism is close to the auxiliary stretch bending part and is arranged, the auxiliary stretch bending part comprises a supporting suspension (40) arranged along the frame length direction of the upper frame surface of the rack (36), a supporting inclined frame (41) is arranged on the upper frame surface of the supporting suspension (40), a supporting jacking cylinder (42) is arranged on the inner side of the supporting inclined frame (41) on the upper frame surface of the supporting suspension (40), a jacking rod supporting the jacking cylinder (42) stretches upwards, and a rod end of the jacking rod supporting the jacking cylinder (42) is provided with a supporting limiting claw (43).

3. The apparatus for forming a guide pre-form for a front door of an automobile according to claim 1 or 2, wherein: the tail end of crooked hydro-cylinder (33) set up the hinge frame, the tail end of crooked hydro-cylinder (33) articulates in crooked hydro-cylinder frame (31) of hinge frame through round pin axle (32), is provided with the locking plate on round pin axle (32), round pin axle (32) and center pin (15) parallel arrangement, set up crooked hydro-cylinder bottom plate (29) above crooked hydro-cylinder frame (31), seted up the bar hole along the direction of arranging of crooked hydro-cylinder (33) on crooked hydro-cylinder bottom plate (29), set up fastening nut (30) on the bar hole, hydro-cylinder bottom plate (29) and the below of the above-mentioned of frame (36) link firmly.

4. The apparatus for forming a guide pre-form for a front door of an automobile according to claim 1 or 2, wherein: the upper cylinder body of the pressing oil cylinder (38) is connected with a pressing frame side plate (2), a pressing frame bottom plate (1) is fixedly arranged on the upper side of the pressing frame side plate (2), and the pressing frame bottom plate (1) is fixedly connected with the lower surface of the upper frame surface of the rack (36).

5. The apparatus for forming a guide pre-form for a front door of an automobile according to claim 1 or 2, wherein: the bottom of the frame (36) is provided with a machine foot screw rod (35), a reinforcing fastening sleeve is arranged between the upper end of the machine foot screw rod (35) and the bottom surface of the frame (36), and a machine foot base (34) is fastened at the lower end of the machine foot screw rod (35).

6. The apparatus for forming a guide pre-form for a front door of an automobile according to claim 1 or 2, wherein: the inner side vertex angle is rotatably and hingedly provided with a pressing oil cylinder joint (6), and the piston rod end of the pressing oil cylinder (38) is fixedly connected with the pressing oil cylinder joint (6).

7. The apparatus for forming a guide pre-form for a front door of an automobile according to claim 1 or 2, wherein: the last face of die bottom plate (10) is perpendicular the bar groove of falling the ladder be provided with spacing lug, die (11) below set up spacing recess, spacing recess arrange in spacing lug on and set up the locking unit between spacing lug and the spacing recess.

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