CN113926888B

CN113926888B - Variable cross-section profiling rolling cold bending equipment and processing method thereof

Info

Publication number: CN113926888B
Application number: CN202111241070.2A
Authority: CN
Inventors: 郑松军; 蒋辉
Original assignee: Liaoning Jintianma Primate Car Manufacturing Co ltd
Current assignee: Liaoning Jintianma Primate Car Manufacturing Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2024-06-11
Anticipated expiration: 2041-10-25
Also published as: CN113926888A

Abstract

The equipment comprises a feeding roller way, a forming unit and a discharging roller way, wherein the feeding roller way is arranged at an inlet at the front end of the forming unit and is used for receiving a workpiece to be subjected to cold bending and conveying the workpiece to be subjected to cold bending into the forming unit; the forming unit is used for rolling and cold-bending the workpiece to form; the blanking roller way is arranged at an outlet of the tail end of the forming unit and is used for receiving the workpiece after cold bending forming. The invention adopts the online equipment conical roller gradual rolling mode to realize the variable cross-section cold bending of the workpiece, and can simultaneously carry out cold bending on the upper surface and the lower surface of the workpiece and form once; the problems of inclination, deviation, inaccurate position judgment, uneven rolling, low processing yield and the like of a workpiece in the cold bending operation due to hoisting, transportation and rolling processes are solved; compared with the yield of 70% of foreign monomer cold bending machines, the method can improve the yield to more than 95%, and has higher production efficiency and low equipment use and maintenance cost.

Description

Variable cross-section profiling rolling cold bending equipment and processing method thereof

Technical Field

The invention belongs to the technical field of metal forming, and particularly relates to variable cross-section profiling rolling cold bending equipment and a processing method thereof.

Background

At present, conventional cold bending equipment in China can only process sectional materials with equal sections, and most of sectional materials used in the application fields have different requirements on the moment of inertia of the sectional materials due to different stress at different positions. If the sections are all equal-section sections, in order to meet the strength requirement, the section of the section must be designed according to the position with the largest section moment of inertia requirement, so that the section with the small moment of inertia requirement has excessive strength, causes waste, and is not beneficial to energy conservation and environmental protection. Particularly in some fields sensitive to weight, such as automobiles and trailer girders, it is particularly necessary to reduce the weight of the vehicle more while ensuring the bearing capacity, so that not only is the production cost reduced for the vehicle enterprise reduced, but also the operation cost is reduced for the vehicle owners and the income is increased.

Disclosure of Invention

In order to solve the problems of lack of economical and practical variable cross-section cold bending equipment and processing technology and low efficiency, the invention provides variable cross-section profiling rolling cold bending equipment and a processing method thereof. The specific technical scheme is as follows:

The variable cross-section profiling rolling cold bending equipment comprises a feeding roller way 1, a forming unit 2 and a discharging roller way 3, wherein the feeding roller way 1 is arranged at an inlet of the front end of the forming unit 2 and is used for receiving a workpiece 4 to be cold bent and conveying the workpiece 4 to be cold bent into the forming unit 2; the forming unit 2 is used for rolling and cold-bending the workpiece 4; the blanking roller way 3 is arranged at an outlet of the tail end of the forming unit 2 and is used for receiving the cold-formed workpiece 4;

in the technical scheme, the feeding roller way 1 comprises a roller way frame I1.1, a guide frame I1.2, a linear guide rail I1.3, a clamping roller I1.4, a clamping roller swing arm I1.5, a clamping roller I1.6, a reducing motor I1.7, a roller transmission chain I1.8, a conveying roller I1.9, a detection sensor I1.10, a cylinder I1.11, a triangular rotating rod I1.12 and a connecting rod I1.13;

The roller way frame I1.1 is a frame structure formed by assembling and welding sectional materials; the two ends of the top surface of the roller way frame I1.1 are respectively provided with a section of linear guide rail I1.3, the linear guide rail I1.3 is provided with a guide frame I1.2, and the guide frame I1.2 can move along the linear guide rail I1.3; two clamping wheel rolling shafts I1.4 are arranged on two longitudinal sides of the middle of the top surface of the roller bed frame I1.1 in parallel, a plurality of clamping wheel swing arms I1.5 with two sides being correspondingly and uniformly distributed are sleeved on the two clamping wheel rolling shafts I1.4, and a clamping wheel I1.6 is arranged on the inner side of the upper part of each clamping wheel swing arm I1.5; the lower ends of the swing arms I1.5 of each pair of clamping wheels corresponding to the two sides are connected with the two ends of the same triangular rotating rod I1.12 through a connecting rod I1.13, and the lower ends of the triangles of the triangular rotating rods I1.12 are connected with a cylinder I1.11; a plurality of uniformly distributed conveying rollers I1.9 are longitudinally arranged between the two clamping roller shafts I1.4, and the roller shafts of the conveying rollers I1.9 are connected with a speed reduction motor I1.7 through roller transmission chains I1.8; the two ends of the roller way frame I1.1 are symmetrically provided with detection sensor brackets, the detection sensor brackets at the two ends are respectively provided with a detection sensor I1.10, and the detection sensors I1.10 can be adjusted in position and fixed along the vertical direction of the detection sensor brackets;

in the above technical scheme, the workpiece 4 comprises a variable cross-section profiling die and a variable cross-section workpiece, and the upper and lower edges to be cold-bent of the variable cross-section workpiece protrude from the upper and lower surfaces of the variable cross-section profiling die;

In the technical scheme, the variable cross-section profiling die is of a three-layer structure and is divided into a middle layer and an outer layer, and variable cross-section workpieces are respectively attached to two sides of the middle layer;

in the above technical solution, when the directions of the cold bending and flanging of the two variable-section workpieces are opposite, the other sides of the two variable-section workpieces are attached with an outer layer, so as to form a workpiece 4 with a five-layer structure;

In the above technical scheme, when the cold bending and flanging directions of the two variable cross-section workpieces are consistent, the other sides of the two variable cross-section workpieces are not provided with outer layers, so that a workpiece 4 with a three-layer structure is formed;

In the technical scheme, the two variable cross-section workpieces are fixed on the variable cross-section profiling die through the clamping bolts, and the clamping bolts do not protrude or protrude on the surfaces of two outer side layers of the variable cross-section profiling die; when the clamping bolts protrude out of the surfaces of two outer layers of the variable-section profiling die, the guide frame I1.2 moves along the linear guide rail I1.3 to avoid the clamping bolts of the workpiece 4, so that the clamping bolts of the workpiece 4 do not correspond to the guide frame I1.2;

In the technical scheme, when the workpiece 4 is hoisted to the feeding roller way 1 by the hoisting tool, the precision requirement of the hoisting position can be reduced by the guide frame I1.2, namely when the workpiece 4 is hoisted and deviates within +/-120 mm of the longitudinal central line of the feeding roller way 1, the guide frame I1.2 can smoothly put the workpiece 4 in place, and the longitudinal central line of the workpiece 4 is aligned with the longitudinal central line of the roller way frame I1.1 and is pressed on the conveying roller wheel I1.9;

In the technical scheme, the swing arm I1.5 of the clamping wheel is in an outward-stretching state initially, when the workpiece 4 is lifted into a loading position, the swing arm I1.5 of the clamping wheel clamps the workpiece 4, and then the lifting appliance is loosened to prevent the workpiece 4 from tilting when the lifting appliance is loosened;

In the technical scheme, the detection sensor I1.10 is used for detecting whether the workpiece 4 is lifted in place, when the detection sensor I1.10 detects that the workpiece 4 is lifted in place, the detection sensor I1.10 sends a signal instruction, the driving cylinder I1.11 stretches and pushes the triangular rotating rod I1.12 to rotate, the connecting rod I1.13 is driven to regulate the rotation of the clamping wheel rolling shafts I1.4 on two sides, the clamping wheel rolling shafts I1.4 drive the clamping wheel swing arms I1.5 to regulate clamping, the clamping wheels I1.6 correct and clamp the workpiece 4, the workpiece 4 is prevented from inclining towards two sides, the workpiece 4 is ensured to always keep a vertical state, and the longitudinal center line of the workpiece 4 coincides with the longitudinal center line of the feeding roller way 1;

In the technical scheme, a plurality of conveying rollers I1.9 are connected through chain wheels, and a gear motor I1.7 drives a plurality of conveying rollers I1.9 to rotate at the same time to convey a workpiece 4 to be subjected to cold bending into a forming unit 2;

In the technical scheme, the forming unit 2 is formed by connecting an N-pass single cold bending machine, wherein N is more than or equal to 12, and each pass of single cold bending machine comprises a base 2.1, a housing frame 2.2, an upper cover plate 2.3, an upper slide seat assembly 2.4, a lower slide seat assembly 2.5, an upper oil cylinder 2.6, a lower oil cylinder 2.7 and a linear guide rail 2.8; the base 2.1 is a bearing component of all parts, the two longitudinal sides of the base 2.1 are provided with the housing frames 2.2, the top of the housing frames 2.2 is provided with the upper cover plate 2.3, and the base 2.1, the housing frames 2.2 and the upper cover plate 2.3 jointly form a rectangular frame structure of the machine body; the inner side surfaces of the housing frames 2.2 at two sides are respectively provided with a linear guide rail 2.8, the linear guide rails 2.8 at two sides are respectively provided with an upper sliding block and a lower sliding block, the upper sliding blocks at two sides are fixedly connected with the upper sliding seat assembly 2.4, the lower sliding blocks at two sides are fixedly connected with the lower sliding seat assembly 2.5, and the upper sliding seat assembly 2.4 and the lower sliding seat assembly 2.5 can move up and down along the linear guide rails 2.8; the top of the upper sliding seat assembly 2.4 is connected with the rod end of the upper oil cylinder 2.6, and the cylinder body of the upper oil cylinder 2.6 is fixed on the upper cover plate 2.3; the upper oil cylinder 2.6 provides power for the upper sliding seat assembly 2.4 to move up and down and downward pressure applied to the workpiece 4; the bottom of the lower slide seat assembly 2.5 is connected with the rod end of a lower oil cylinder 2.7, the cylinder body of the lower oil cylinder 2.7 is fixed on the base 2.1, and the lower oil cylinder 2.7 provides power for the lower slide seat assembly 2.5 to move up and down and upward pressure applied to the workpiece 4;

in the above technical scheme, the upper slide seat assembly 2.4 comprises a roller frame 2.41, a roller side bracket 2.42, a rolling reduction motor 2.43, a roller shaft 2.44, a roller baffle ring 2.45 and a rolling roller 2.46; the roller frame 2.41 is of a four-sided box type structure, the top surface of the roller frame 2.41 is provided with lugs connected with an upper oil cylinder 2.6, the front and rear surfaces of the roller frame 2.41 are provided with arc-shaped openings for a workpiece 4 to pass through, the outer side of the left surface of the roller frame 2.41 is provided with a rolling reduction motor 2.43, the rolling reduction motor 2.43 is connected with a roller shaft 2.44 penetrating through the left surface of the roller frame 2.41, and a bearing is arranged at the left surface section of the roller shaft 2.44 penetrating through the roller frame 2.41; a roller side bracket 2.42 is arranged on the inner side of the right surface of the roller frame 2.41; the other end of the roller shaft 2.44 is connected with a roller side bracket 2.42, and a bearing is arranged at the joint of the roller shaft 2.44 and the roller side bracket 2.42; the roller shaft 2.44 is sleeved with a roller shaft 2.46; one end of a roller side bracket 2.42 of the roller shaft 2.44 is sleeved with a roller baffle ring 2.45, and the roller baffle ring 2.45 is used for limiting the axial movement of the roller 2.46;

In the above technical scheme, the upper slide seat assembly 2.4 is further provided with a linear displacement detection sensor 2.10, a guide rail of the linear displacement detection sensor 2.10 is mounted on the side surface of the housing frame 2.2, a movable reading head of the linear displacement detection sensor 2.10 is fixed on the roller frame 2.41 through a connecting rod, and the linear displacement detection sensor 2.10 can monitor the up-and-down movement position of the upper slide seat assembly 2.4 in real time and control the upper slide seat assembly 2.4 to stop at a system set position through a control system;

In the technical scheme, the lower slide seat assembly 2.5 and the upper slide seat assembly 2.4 have the same structure; the upper slide seat assembly 2.4 and the lower slide seat assembly 2.5 are arranged symmetrically up and down to form a rolling pass;

In the above technical scheme, the upper part of the roller frame of the upper slide seat assembly 2.4 or the lower slide seat assembly 2.5 is also provided with two detection sensor brackets, the two detection sensor brackets are provided with proximity sensors 2.9, the proximity sensors 2.9 are used for detecting the position of the workpiece 4 relative to the roller and the roller, and sending a signal to a control system aiming at the linear displacement position of the workpiece 4 in the forming unit 2, and the control system drives the upper slide seat assembly 2.4 and the lower slide seat assembly 2.5 to ascend, descend, stop or self-lock and the start or stop of the roller and the roller;

In the technical scheme, the rolling reduction motor 2.43 drives the roller 2.46 to rotate through the roller shaft 2.44;

In the technical scheme, the top of the roller side bracket 2.42 is connected with the top of the roller frame 2.41 through bolts, and the bolts can be used for conveniently replacing different roller wheels 2.46;

in the above technical solution, the forming unit 2 has 15 passes, and the forming angle of the rolling roller 2.46 in each pass is different, and gradually increases from 0 ° to the forming angle; the forming angle of the rolling roller 2.46 of the first two passes of the inlet of the forming unit 2 is 0 degrees, and the forming unit plays a role of a guide wheel; the forming angles of the rolling roller 2.46 of the 3 rd pass to the 15 th pass are 11 degrees, 22 degrees, 32 degrees, 42 degrees, 51 degrees, 60 degrees, 68 degrees, 75 degrees, 81 degrees, 86 degrees, 89 degrees, 90 degrees and 91 degrees to 95 degrees in sequence;

in the technical scheme, the housing frame 2.2 is provided with the cable drag chain 2.11 which corresponds to the upper slide seat assembly 2.4 and the lower slide seat assembly 2.5 respectively and is used for supporting and protecting the cables of the motor and the sensor;

In the technical scheme, the blanking roller way 3 comprises a roller way frame II 3.1, a clamping wheel roller II 3.2, a clamping wheel swing arm II 3.3, a clamping wheel II 3.4, a gear motor II 3.5, a roller transmission chain II 3.6, a conveying roller II 3.7, a proximity sensor II 3.8, a cylinder II 3.9, a triangular rotating rod II 3.10 and a connecting rod II 3.11;

The roller way frame II 3.1 is a frame structure formed by assembling and welding sectional materials; two clamping wheel rolling shafts II 3.2 are arranged on two longitudinal sides of the middle of the top surface of the roller way frame II 3.1 in parallel, a plurality of clamping wheel swing arms II 3.3 with two sides being correspondingly and uniformly distributed are sleeved on the two clamping wheel rolling shafts II 3.2, and a clamping wheel II 3.4 is arranged on the inner side of the upper part of each clamping wheel swing arm II 3.3; the lower ends of each pair of clamping wheel swing arms II 3.3 corresponding to the two sides are connected with the two ends of the same triangular rotating rod II 3.10 through a connecting rod II 3.11, and the lower ends of the triangles of the triangular rotating rods II 3.10 are connected with a cylinder II 3.9; a plurality of uniformly distributed conveying rollers II 3.7 are longitudinally arranged between the two clamping roller shafts II 3.2, and the roller shafts of the conveying rollers II 3.7 are connected with a gear motor II 3.5 through roller transmission chains II 3.6; 2-8 detection sensor brackets are arranged from the middle part to the tail end of the roller way frame II 3.1, each detection sensor bracket is provided with a proximity sensor II 3.8, and the positions of the proximity sensors II 3.8 can be adjusted and fixed along the longitudinal direction of the detection sensor bracket;

in the above technical scheme, the distance between adjacent detection sensor brackets is equal to the center distance between two adjacent single cold bending machines of the forming unit 2;

In the above technical scheme, the proximity sensor ii 3.8 is configured to detect and determine a linear displacement state of the workpiece 4, send a signal to the control system for a linear displacement position of the workpiece 4 on the discharging roller table 3, and the control system drives the upper slide seat assembly 2.4 and the lower slide seat assembly 2.5 to rise, fall, stop or self-lock, and start or stop of the rolling roller;

in the technical scheme, the initial state of the clamping wheel swing arm II 3.3 is an adduction state, so that the workpiece 4 after cold bending forming is prevented from toppling when entering the blanking roller way 3, and the clamping wheel swing arm II 3.3 is outwards stretched when the workpiece 4 after cold bending forming is lifted away by the lifting appliance, so that the workpiece 4 after cold bending forming is conveniently lifted out;

The variable cross-section profiling rolling cold bending processing method using the variable cross-section profiling rolling cold bending equipment comprises the following steps:

step 1, assembling a workpiece:

Two variable cross-section workpieces are fixed on two sides of a variable cross-section profiling die through clamping bolts to form a workpiece 4;

Step 2, hoisting:

The workpiece 4 is hoisted into the feeding roller way 1 through a lifting appliance, and the position and the inclination of the workpiece 4 are adjusted through the guide frame I1.2 and the clamping wheel I1.6, so that the workpiece 4 is ensured not to deviate or incline;

Step 3, input processing:

starting the forming unit 2, gradually conveying the workpiece 4 into the forming unit 2 through a conveying roller I1.9, and rolling the upper edge and the lower edge of the variable-section workpiece;

the upper oil cylinder 2.6 and the lower oil cylinder 2.7 of each single cold bending machine work or stop at the same time, the upper oil cylinder 2.6 and the lower oil cylinder 2.7 of each single cold bending machine are gradually involved in rolling work from the inlet of the forming unit 2, and the time for the N single cold bending machine to reach the simultaneous working state is 5-8 s; then, starting from the inlet of the forming unit 2, gradually stopping rolling;

step 4, outputting:

The workpiece 4 is continuously rolled and gradually output to the blanking roller way 3 from the outlet of the forming unit 2, and when the workpiece 4 is completely output to the blanking roller way 3, the workpiece 4 after cold bending forming is formed.

In the step 3 of the technical scheme, the cylinder diameters of the upper cylinder 2.6 and the lower cylinder 2.7 are 80-140 mm, the stroke of the upper cylinder 2.6 is less than or equal to 500mm, and the stroke of the lower cylinder 2.7 is less than or equal to 200mm; the maximum retraction speed of the upper oil cylinder 2.6 is less than or equal to 250mm/s, and the maximum retraction speed of the lower oil cylinder 2.7 is less than or equal to 250mm/s; the pressure heads of the upper oil cylinder 2.6 and the lower oil cylinder 2.7 are equal to the surface pressure of the workpiece 4;

In step 3 of the above technical solution, the 1 st and 2 nd passes of the forming unit 2 are not rolled, and the forming angles of the workpiece 4 are 0 °; the workpiece 4 is rolled in the 3 rd pass to the 15 th pass of the forming unit 2, and the forming angles of the cold bending edges of the workpiece 4 are 11 degrees, 22 degrees, 32 degrees, 42 degrees, 51 degrees, 60 degrees, 68 degrees, 75 degrees, 81 degrees, 86 degrees, 89 degrees, 90 degrees and 91 degrees to 95 degrees in sequence;

In the step 3 of the above technical solution, the running speed of the workpiece 4 is more than 10 m/min;

in the step 3 of the technical scheme, the operation time of the forming unit 2 for rolling and cold-bending two 13 m long workpieces 4 at one time is less than 80s;

The variable cross-section profiling rolling cold bending equipment and the processing method thereof are suitable for cold bending processing of constant cross-section workpieces or variable cross-section workpieces, in particular for cold bending processing of C-shaped or Z-shaped girders of automobiles or trailers.

Compared with the prior art, the variable cross-section profiling rolling cold bending equipment and the processing method thereof have the beneficial effects that:

1. according to the invention, the feeding roller way is arranged between workpiece processing, the inclination of the workpiece is restrained by the feeding roller way, the workpiece can enter the forming unit in a longitudinal vertical state, and the transportation trend is not deviated, so that the accuracy of rolling processing is ensured, and the rolling angle and the size of the cold-formed edge are kept consistent. There is currently no effective method in the art to ensure workpiece processing accuracy.

2. According to the invention, the guide frame is arranged on the feeding roller way, so that the workpiece is convenient to hoist and mount, and the hoisting offset is corrected. The hoisting device can correct the positioning when the hoisting offset range is +/-120 mm, effectively reduces the difficulty of hoisting operation, and improves the working efficiency and the positioning precision.

3. The linear guide rail is arranged on the feeding roller way and used for displacement of the guide frame, so that the position of the clamping bolt of the guide frame and the position of the workpiece 4 are prevented from being blocked by collision, the workpiece can be smoothly put into place by sliding the position of the guide frame, and the problem of the clamping of the workpiece into place is solved.

4. According to the invention, the detection sensor is arranged on the feeding roller way to detect the workpiece in-place state, and when the workpiece is inclined or deviated due to installation or transportation, the operation can be stopped in time or the workpiece state can be adjusted through the clamping wheel, so that the rolling processing quality of the workpiece is ensured.

5. The rolling roller forming angle of the first two passes of the inlet of the forming unit is 0 degree, the angle rolling is not carried out, but the roller forming angle plays a role of a guide wheel, and the roller forming angle is used for correcting the state of a workpiece entering the forming unit in the early stage, ensuring that the trend is not deviated and not inclined, further improving the accuracy for the subsequent rolling and ensuring that the rolling surface is not inclined.

6. The invention is provided with the linear displacement detection sensor which moves up and down along with the upper slide seat assembly and the lower slide seat assembly, is used for monitoring the positions of the upper slide seat assembly and the lower slide seat assembly in real time, controlling the rolling interval and the rolling force, ensuring that the system pressure of each pass of single cold bending machine can effectively roll, and improving the uniformity and the accuracy of rolling workpieces.

7. According to the invention, the forming unit and the blanking roller way are provided with the plurality of proximity sensor, so that the running progress position of a workpiece in the forming unit can be monitored in real time, and the starting or stopping of each pass of single cold bending machine can be accurately and sequentially judged, the smooth proceeding of the whole processing process is ensured, the operation accidents are effectively reduced, and the energy is saved. The problems of inaccurate manual judgment, irregular workpiece operation and uneven processing quality in the prior art and energy waste caused by idle running of part of equipment are solved.

8. The invention designs a rolling monomer machine with more than 12 times, preferably 15 times, the effective rolling operation is more than 13 times, the rolling monomer machine is particularly suitable for workpieces with the forming angle of 90 degrees of high-strength steel plates, such as variable-section cold roll processing of special stringers, and designs rolling angles of 11 degrees, 22 degrees, 32 degrees, 42 degrees, 51 degrees, 60 degrees, 68 degrees, 75 degrees, 81 degrees, 86 degrees, 89 degrees, 90 degrees and 91-95 degrees, each pass of accurate rolling is realized, the production efficiency and the precision are ensured, the cold roll forming can be gradually realized, the workpieces are ensured not to deform or break due to cold roll pressure, the use and operation quality of subsequent vehicles is ensured, the upper pressure and the lower pressure are equal, and the quality consistency of upper bending edges and lower bending edges of the workpieces is ensured. In the prior art, the fixed cross section is formed by cold roll forming, the few variable cross section forming is also single machine rolling or less pass rolling (the number of rolling passes is less than 10), the rolling force is large and unbalanced, the forming quality is poor, and the rebound is large.

In addition, the final rolling angle is 91-95 degrees, and the bending angle is used for counteracting bending angle rebound deformation of the cold bending edge of the variable-section workpiece after rolling or in the subsequent use process, so that the bending angle of the cold bending edge is not less than 90 degrees, and the service performance of the workpiece can be effectively improved.

9. The device can realize one-step forming of the upper surface and the lower surface of the variable-section workpiece, and has uniform pressure and quality. The prior art is single-sided rolling, two-pass operation, and the flatness is poor after molding, especially in the area with variable cross section.

10. The invention can cold-bend two workpieces at one time, and compared with single-sided cold bending of a single machine, the invention can improve 4 times of cold bending efficiency; and calculating the time of die installation, hoisting, transportation and the like, and improving the overall processing efficiency by more than 2 times.

11. The invention has the advantages that the die investment is more, the tooling cost is high, the purchasing cost can be greatly reduced compared with imported equipment, the investment cost of the whole equipment is reduced, the working efficiency and the quality of the equipment are improved, the work time for rolling 13 m long workpieces is less than 80s, the running speed of the whole workpiece is increased by more rolling passes and the average rolling pressure of each cold bending machine is small, the whole rolling cold bending speed is high, and the cold bending processing of two 13 m large special-purpose vehicle longitudinal beams can be completed within 80 s.

12. Because the processing material is clamped by the profiling mould, the profiling mould is of a three-layer clamp structure, and is of a five-layer workpiece structure after assembly forming, the two sides of the workpiece are provided with mould surface limiting, and the flatness, the forming angle and the dimensional accuracy of each surface of the workpiece after forming are higher. The workpiece in the prior art is not provided with a profiling die, or the profiling die is not of a three-layer structure, and the limiting effect is poor.

13. The single cold bending machine is convenient and quick to maintain and replace, more than 12 cold bending machines are rolled, average abrasion of each cold bending machine is small, and compared with the single cold bending machine, the single cold bending machine has longer overall service life, is not easy to damage, and greatly saves maintenance cost.

14. The equipment can process variable cross-section workpieces, can be used for processing workpieces with equal cross sections, has high equipment utilization rate, and can cover thin plates, middle plates and thick plates by processing materials; the method can be widely applied to cold-bending forming processing of various aluminum alloy plates, stainless steel plates, common steel plates and high-strength steel plates, the total number of passes can be arranged according to the characteristics of processed workpieces, and the method is particularly suitable for cold-bending processing of C-shaped or Z-shaped girders of automobiles or trailers.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a variable cross-section profiling roll cold bending device according to embodiment 1 of the present invention;

Fig. 2 is a schematic diagram of a feeding roller way structure of a variable cross-section profiling rolling cold bending device according to embodiment 1 of the present invention;

fig. 3 is an enlarged view of the head end of a feeding roller table of a variable cross-section profiling rolling cold bending device in embodiment 1 of the invention;

Fig. 4 is an enlarged view of the inlet end of a feeding roller table of a variable cross-section profiling rolling cold bending device in embodiment 1 of the invention;

fig. 5 is a side view of the head end of a feeding roller table of the variable cross-section profiling rolling cold bending device in embodiment 1 of the invention;

Fig. 6 is a side view of the inlet end of a feeding roller table of the variable cross-section profiling rolling cold bending device in embodiment 1 of the invention;

fig. 7 is a schematic diagram of a structure of a blanking roller table of a variable cross-section profiling rolling cold bending device in embodiment 1 of the present invention;

fig. 8 is an enlarged view of the tail end of a discharging roller table of a variable cross-section profiling rolling cold bending device in embodiment 1 of the present invention;

fig. 9 is a side view of the tail end of a discharging roller table of a variable cross-section profiling rolling cold bending device in embodiment 1 of the invention;

fig. 10 is a side view of the outlet end of a discharging roller table of the variable cross-section profiling rolling cold bending device in embodiment 1 of the present invention;

FIG. 11 is a schematic perspective view showing the on-line structure of a 5-pass single cold-bending machine of a forming unit of a variable cross-section profiling rolling cold-bending device according to embodiment 1 of the present invention;

FIG. 12 is an on-line left side view of a 5-pass single cold roll forming machine of a forming unit of a variable cross-section profiling rolling cold roll forming device according to example 1 of the present invention;

FIG. 13 is a top plan view of section A of FIG. 12;

fig. 14 is a schematic structural perspective view of a single cold bending machine of a variable cross-section profiling rolling cold bending device in embodiment 1 of the present invention;

FIG. 15 is a left side view of a single cold bending machine of a variable cross-section profiling roll cold bending device according to example 1 of the present invention;

FIG. 16 is an enlarged view of the carriage assembly of FIG. 15;

FIG. 17 is a top plan view of the section B of FIG. 15, i.e., a top plan view of the lower carriage assembly;

FIG. 18 is a front view of an upper carriage assembly of a variable cross-section profiling roll cold bending apparatus according to embodiment 1 of the present invention;

FIG. 19 is a top view of an upper carriage assembly of a variable cross-section profiling roll cold bending apparatus according to embodiment 1 of the present invention;

FIG. 20 is an elevational view of the upper carriage assembly of FIG. 18 after installation of a roller;

FIG. 21 is a top plan view of the upper carriage assembly of FIG. 19 with a roller wheel mounted;

fig. 22 is a schematic view of the structure of the workpiece 4 in embodiment 1 of the present invention;

FIG. 23 is a schematic view of an intermediate layer of a profiling mold of example 1 of the present invention;

FIG. 24 is a schematic view of the outer layer of the profiling mold of example 1 of the present invention;

FIG. 25 is a schematic view of a variable cross-section workpiece;

in the figure: 1-a feeding roller way, 1.1-a roller way frame I, 1.2-a guide frame I, 1.3-a linear guide rail I, 1.4-a clamping roller I, 1.5-a clamping roller swing arm I, 1.6-a clamping roller I, 1.7-a gear motor I, 1.8-a roller transmission chain I, 1.9-a conveying roller I, 1.10-a detection sensor I, 1.11-a cylinder I, 1.12-a triangular rotating rod I and 1.13-a connecting rod I; 2-forming units, 2.1-bases, 2.2-housing frames, 2.3-upper cover plates, 2.4-upper slide assemblies, 2.5-lower slide assemblies, 2.6-upper oil cylinders, 2.7-lower oil cylinders, 2.8-linear guide rails, 2.9-proximity sensors, 2.10-linear displacement detection sensors, 2.11-cable drag chains, 2.41-roller frames, 2.42-roller side supports, 2.43-rolling speed reducing motors, 2.44-roller shafts, 2.45-roller retainer rings and 2.46-rolling rollers; 3-blanking roller way, 3.1-roller frame II, 3.2-clamping roller II, 3.3-clamping roller swing arm II, 3.4-clamping roller II, 3.5-reducing motor II, 3.6-roller driving chain II, 3.7-conveying roller II, 3.8-proximity sensor II, 3.9-cylinder II, 3.10-triangle rotary rod II and 3.11-connecting rod II; 4-a workpiece.

Detailed Description

The invention will be further described with reference to specific embodiments and figures 1-25, but the invention is not limited to these embodiments.

Example 1

As shown in fig. 2-6, the feeding roller way 1 comprises a roller way frame i 1.1, a guide frame i 1.2, a linear guide rail i 1.3, a clamping roller i 1.4, a clamping roller swing arm i 1.5, a clamping roller i 1.6, a gear motor i 1.7, a roller transmission chain i 1.8, a conveying roller i 1.9, a detection sensor i 1.10, a cylinder i 1.11, a triangular rotating rod i 1.12 and a connecting rod i 1.13; the roller way frame I1.1 is a frame structure formed by assembling and welding sectional materials; the two ends of the top surface of the roller way frame I1.1 are respectively provided with a section of linear guide rail I1.3, the linear guide rail I1.3 is provided with a guide frame I1.2, and the guide frame I1.2 can move along the linear guide rail I1.3; two clamping wheel rolling shafts I1.4 are arranged on two longitudinal sides of the middle of the top surface of the roller bed frame I1.1 in parallel, a plurality of clamping wheel swing arms I1.5 with two sides being correspondingly and uniformly distributed are sleeved on the two clamping wheel rolling shafts I1.4, and a clamping wheel I1.6 is arranged on the inner side of the upper part of each clamping wheel swing arm I1.5; the lower ends of the swing arms I1.5 of each pair of clamping wheels corresponding to the two sides are connected with the two ends of the same triangular rotating rod I1.12 through a connecting rod I1.13, and the lower ends of the triangles of the triangular rotating rods I1.12 are connected with a cylinder I1.11; a plurality of uniformly distributed conveying rollers I1.9 are longitudinally arranged between the two clamping roller shafts I1.4, and the roller shafts of the conveying rollers I1.9 are connected with a speed reduction motor I1.7 through roller transmission chains I1.8; the two ends of the roller way frame I1.1 are symmetrically provided with detection sensor brackets, the detection sensor brackets at the two ends are respectively provided with a detection sensor I1.10, and the detection sensors I1.10 can be adjusted in position and fixed along the vertical direction of the detection sensor brackets;

22-25, the workpiece 4 comprises a variable-section profiling die and a variable-section workpiece, wherein the upper and lower edges to be cold-bent of the variable-section workpiece protrude above and below the variable-section profiling die; the variable cross-section profiling die is of a three-layer structure and is divided into an intermediate layer and an outer layer, and variable cross-section workpieces are respectively attached to two sides of the intermediate layer; the cold bending flanging directions of the two variable-section workpieces are opposite, and an outer layer is attached to the other side of the two variable-section workpieces to form a workpiece 4 with a five-layer structure; the two variable cross-section workpieces are fixed on the variable cross-section profiling die through clamping bolts, and the clamping bolts protrude out of the surfaces of two outer side layers of the variable cross-section profiling die;

The guide frame I1.2 moves along the linear guide rail I1.3 to avoid the clamping bolt of the workpiece 4, so that the clamping bolt of the workpiece 4 does not correspond to the guide frame I1.2; when the workpiece 4 is hoisted to the feeding roller way 1 by a hoisting tool, the precision requirement of the hoisting position can be reduced by the guide frame I1.2, namely when the workpiece 4 is hoisted and deviates within +/-120 mm of the longitudinal central line of the feeding roller way 1, the guide frame I1.2 can smoothly put the workpiece 4 into position, and the longitudinal central line of the workpiece 4 is aligned with the longitudinal central line of the roller way frame I1.1 and is pressed on the conveying roller wheel I1.9; the initial state of the clamping wheel swing arm I1.5 is an outward-opening state, when the workpiece 4 is lifted into a loading position, the clamping wheel swing arm I1.5 clamps the workpiece 4, then the lifting appliance is loosened, and the workpiece 4 is prevented from tilting when the lifting appliance is loosened; the detection sensor I1.10 is used for detecting whether the workpiece 4 is lifted in place, when the detection sensor I1.10 detects that the workpiece 4 is lifted in place, the detection sensor I1.10 sends a signal instruction, the driving cylinder I1.11 stretches and drives the triangular rotating rod I1.12 to rotate, the connecting rod I1.13 is driven to adjust the clamping roller I1.4 on two sides to rotate, the clamping roller I1.4 drives the clamping roller swing arm I1.5 to adjust clamping, the clamping roller I1.6 corrects and clamps the workpiece 4, the workpiece 4 is prevented from inclining towards two sides, the workpiece 4 is ensured to always keep a vertical state, and the longitudinal center line of the workpiece 4 coincides with the longitudinal center line of the feeding roller way 1; the conveying rollers I1.9 are connected through chain wheels, the gear motor I1.7 drives the conveying rollers I1.9 to rotate at the same time, and a workpiece 4 to be subjected to cold bending is conveyed to enter the forming unit 2;

As shown in fig. 11-21, the forming unit 2 is formed by connecting a 15-pass single cold bending machine, and each pass single cold bending machine comprises a base 2.1, a housing frame 2.2, an upper cover plate 2.3, an upper slide seat assembly 2.4, a lower slide seat assembly 2.5, an upper oil cylinder 2.6, a lower oil cylinder 2.7 and a linear guide rail 2.8; the base 2.1 is a bearing component of all parts, the two longitudinal sides of the base 2.1 are provided with the housing frames 2.2, the top of the housing frames 2.2 is provided with the upper cover plate 2.3, and the base 2.1, the housing frames 2.2 and the upper cover plate 2.3 jointly form a rectangular frame structure of the machine body; the inner side surfaces of the housing frames 2.2 at two sides are respectively provided with a linear guide rail 2.8, the linear guide rails 2.8 at two sides are respectively provided with an upper sliding block and a lower sliding block, the upper sliding blocks at two sides are fixedly connected with the upper sliding seat assembly 2.4, the lower sliding blocks at two sides are fixedly connected with the lower sliding seat assembly 2.5, and the upper sliding seat assembly 2.4 and the lower sliding seat assembly 2.5 can move up and down along the linear guide rails 2.8; the top of the upper sliding seat assembly 2.4 is connected with the rod end of the upper oil cylinder 2.6, and the cylinder body of the upper oil cylinder 2.6 is fixed on the upper cover plate 2.3; the upper oil cylinder 2.6 provides power for the upper sliding seat assembly 2.4 to move up and down and downward pressure applied to the workpiece 4; the bottom of the lower slide seat assembly 2.5 is connected with the rod end of a lower oil cylinder 2.7, the cylinder body of the lower oil cylinder 2.7 is fixed on the base 2.1, and the lower oil cylinder 2.7 provides power for the lower slide seat assembly 2.5 to move up and down and upward pressure applied to the workpiece 4;

the upper slide seat assembly 2.4 comprises a roller frame 2.41, a roller side bracket 2.42, a roller reduction motor 2.43, a roller shaft 2.44, a roller retainer 2.45 and a roller 2.46; the roller frame 2.41 is of a four-sided box type structure, the top surface of the roller frame 2.41 is provided with lugs connected with an upper oil cylinder 2.6, the front and rear surfaces of the roller frame 2.41 are provided with arc-shaped openings for a workpiece 4 to pass through, the outer side of the left surface of the roller frame 2.41 is provided with a rolling reduction motor 2.43, the rolling reduction motor 2.43 is connected with a roller shaft 2.44 penetrating through the left surface of the roller frame 2.41, and a bearing is arranged at the left surface section of the roller shaft 2.44 penetrating through the roller frame 2.41; a roller side bracket 2.42 is arranged on the inner side of the right surface of the roller frame 2.41; the other end of the roller shaft 2.44 is connected with a roller side bracket 2.42, and a bearing is arranged at the joint of the roller shaft 2.44 and the roller side bracket 2.42; the roller shaft 2.44 is sleeved with a roller shaft 2.46; one end of a roller side bracket 2.42 of the roller shaft 2.44 is sleeved with a roller baffle ring 2.45, and the roller baffle ring 2.45 is used for limiting the axial movement of the roller 2.46; the upper slide seat assembly 2.4 is also provided with a linear displacement detection sensor 2.10, a guide rail of the linear displacement detection sensor 2.10 is arranged on the side surface of the housing frame 2.2, a movable reading head of the linear displacement detection sensor 2.10 is fixed on the roller frame 2.41 through a connecting rod, and the linear displacement detection sensor 2.10 can monitor the up-and-down movement position of the upper slide seat assembly 2.4 in real time and control the upper slide seat assembly 2.4 to stop at a system set position through a control system; the rolling reduction motor 2.43 drives the roller 2.46 to rotate through the roller shaft 2.44; the top of the roller side bracket 2.42 is connected with the top surface of the roller frame 2.41 through bolts, and the bolts can be used for conveniently replacing different roller rollers 2.46; the forming angle of the rolling roller 2.46 is different in each pass, and gradually increases from 0 degree to the forming angle; the forming angle of the rolling roller 2.46 of the first two passes of the inlet of the forming unit 2 is 0 degrees, and the forming unit plays a role of a guide wheel; the forming angles of the rolling roller 2.46 from the 3 rd pass to the 15 th pass are 11 degrees, 22 degrees, 32 degrees, 42 degrees, 51 degrees, 60 degrees, 68 degrees, 75 degrees, 81 degrees, 86 degrees, 89 degrees, 90 degrees and 92 degrees in sequence;

The lower slide seat assembly 2.5 and the upper slide seat assembly 2.4 have the same structure; the upper slide seat assembly 2.4 and the lower slide seat assembly 2.5 are arranged symmetrically up and down to form a rolling pass; as shown in fig. 17, the upper part of the roller frame of the lower slide seat assembly 2.5 is further provided with two detection sensor brackets, the two detection sensor brackets are provided with proximity sensors 2.9, the proximity sensors 2.9 are used for detecting the position of the workpiece 4 relative to the roller frame, a signal is sent to a control system aiming at the linear displacement position of the workpiece 4 in the forming unit 2, and the control system drives the upper slide seat assembly 2.4 and the lower slide seat assembly 2.5 to ascend, descend, stop or self-lock and start or stop of the roller frame;

The housing frame 2.2 is provided with a cable drag chain 2.11 which corresponds to the upper slide seat assembly 2.4 and the lower slide seat assembly 2.5 respectively and is used for supporting cables for protecting a motor and a sensor;

As shown in fig. 7-10, the blanking roller way 3 comprises a roller frame ii 3.1, a clamping wheel roller ii 3.2, a clamping wheel swing arm ii 3.3, a clamping wheel ii 3.4, a gear motor ii 3.5, a roller transmission chain ii 3.6, a conveying roller ii 3.7, a proximity sensor ii 3.8, a cylinder ii 3.9, a triangular rotating rod ii 3.10 and a connecting rod ii 3.11; the roller way frame II 3.1 is a frame structure formed by assembling and welding sectional materials; two clamping wheel rolling shafts II 3.2 are arranged on two longitudinal sides of the middle of the top surface of the roller way frame II 3.1 in parallel, a plurality of clamping wheel swing arms II 3.3 with two sides being correspondingly and uniformly distributed are sleeved on the two clamping wheel rolling shafts II 3.2, and a clamping wheel II 3.4 is arranged on the inner side of the upper part of each clamping wheel swing arm II 3.3; the lower ends of each pair of clamping wheel swing arms II 3.3 corresponding to the two sides are connected with the two ends of the same triangular rotating rod II 3.10 through a connecting rod II 3.11, and the lower ends of the triangles of the triangular rotating rods II 3.10 are connected with a cylinder II 3.9; a plurality of uniformly distributed conveying rollers II 3.7 are longitudinally arranged between the two clamping roller shafts II 3.2, and the roller shafts of the conveying rollers II 3.7 are connected with a gear motor II 3.5 through roller transmission chains II 3.6; as shown in fig. 8, 5 detection sensor brackets with intervals are arranged from the middle part to the tail end of the roller way frame ii 3.1, the distance between every two adjacent detection sensor brackets is equal to the center distance of two adjacent single cold bending machines of the forming unit 2, each detection sensor bracket is provided with a proximity sensor ii 3.8, and the position of each proximity sensor ii 3.8 can be adjusted and fixed along the longitudinal direction of the detection sensor bracket; the proximity sensor II 3.8 is used for detecting and judging the linear displacement state of the workpiece 4, sending a signal to the control system aiming at the linear displacement position of the workpiece 4 on the blanking roller way 3, and driving the upper slide seat assembly 2.4 and the lower slide seat assembly 2.5 to ascend, descend, stop or self-lock by the control system, and starting or stopping the rolling roller; the initial state of the clamping wheel swing arm II 3.3 is an adduction state, so that the workpiece 4 after cold bending forming is prevented from toppling when entering the blanking roller way 3, and the clamping wheel swing arm II 3.3 is outwards stretched when the workpiece 4 after cold bending forming is lifted by a lifting appliance, so that the workpiece 4 after cold bending forming is conveniently lifted out;

step 1, assembling a workpiece:

Step 2, hoisting:

Step 3, input processing:

the upper oil cylinder 2.6 and the lower oil cylinder 2.7 of each single cold bending machine work or stop at the same time, the upper oil cylinder 2.6 and the lower oil cylinder 2.7 of each single cold bending machine are gradually involved in rolling work from the inlet of the forming unit 2, and the time for the N single cold bending machine to reach the simultaneous working state is 6s; then, starting from the inlet of the forming unit 2, gradually stopping rolling;

step 4, outputting:

The variable cross-section workpiece of the embodiment is a special longitudinal beam with the length of 13 meters, as shown in fig. 25; the cylinder diameter of the upper cylinder 2.6 and the lower cylinder 2.7 of the forming unit 2 is 125mm, the stroke of the upper cylinder 2.6 is 400mm, and the stroke of the lower cylinder 2.7 is 50mm; the maximum speed of retraction of the upper oil cylinder 2.6 is 200mm/s, and the maximum speed of retraction of the lower oil cylinder 2.7 is 20mm/s; the pressure heads of the upper oil cylinder 2.6 and the lower oil cylinder 2.7 are equal to the surface pressure of the workpiece 4;

In the forming machine set 2 of the embodiment, the rolling is not performed in the 1 st pass and the 2 nd pass, and the forming angle of the workpiece 4 is 0 degrees; rolling the workpiece 4 from the 3 rd pass to the 15 th pass, wherein the forming angles of the cold-formed edges of the workpiece 4 are 11 degrees, 22 degrees, 32 degrees, 42 degrees, 51 degrees, 60 degrees, 68 degrees, 75 degrees, 81 degrees, 86 degrees, 89 degrees, 90 degrees and 92 degrees in sequence;

The running speed of the workpiece 4 of the embodiment is 10m/min;

the operation time of the two special vehicle longitudinal beams with the length of 13 meters for one-time rolling cold bending of the forming unit 2 is 78s, the angle of the cold bending surface of the special vehicle longitudinal beam after cold bending forming is consistent, and the flatness of the transition position of the variable cross section is particularly good.

Example 2

The drawing is the same as that of the embodiment 1, and as shown in fig. 1, the variable cross-section profiling rolling cold bending equipment comprises a feeding roller way 1, a forming unit 2 and a discharging roller way 3, wherein the feeding roller way 1 is arranged at an inlet at the front end of the forming unit 2 and is used for receiving a workpiece 4 to be cold-bent and conveying the workpiece 4 to be cold-bent into the forming unit 2; the forming unit 2 is used for rolling and cold-bending the workpiece 4; the blanking roller way 3 is arranged at an outlet of the tail end of the forming unit 2 and is used for receiving the cold-formed workpiece 4;

22-25, the workpiece 4 comprises a variable-section profiling die and a variable-section workpiece, wherein the upper and lower edges to be cold-bent of the variable-section workpiece protrude above and below the variable-section profiling die; the variable cross-section profiling die is of a three-layer structure and is divided into a middle layer and an outer layer, variable cross-section workpieces are respectively attached to two sides of the middle layer, cold bending flanging directions of the two variable cross-section workpieces are consistent, and the outer layer is not arranged on the other side of the two variable cross-section workpieces, so that a workpiece 4 of the three-layer structure is formed; the two variable cross-section workpieces are fixed on the variable cross-section profiling die through clamping bolts, and the clamping bolts protrude out of the surfaces of two outer side layers of the variable cross-section profiling die;

The upper slide seat assembly 2.4 comprises a roller frame 2.41, a roller side bracket 2.42, a roller reduction motor 2.43, a roller shaft 2.44, a roller retainer 2.45 and a roller 2.46; the roller frame 2.41 is of a four-sided box type structure, the top surface of the roller frame 2.41 is provided with lugs connected with an upper oil cylinder 2.6, the front and rear surfaces of the roller frame 2.41 are provided with arc-shaped openings for a workpiece 4 to pass through, the outer side of the left surface of the roller frame 2.41 is provided with a rolling reduction motor 2.43, the rolling reduction motor 2.43 is connected with a roller shaft 2.44 penetrating through the left surface of the roller frame 2.41, and a bearing is arranged at the left surface section of the roller shaft 2.44 penetrating through the roller frame 2.41; a roller side bracket 2.42 is arranged on the inner side of the right surface of the roller frame 2.41; the other end of the roller shaft 2.44 is connected with a roller side bracket 2.42, and a bearing is arranged at the joint of the roller shaft 2.44 and the roller side bracket 2.42; the roller shaft 2.44 is sleeved with a roller shaft 2.46; one end of a roller side bracket 2.42 of the roller shaft 2.44 is sleeved with a roller baffle ring 2.45, and the roller baffle ring 2.45 is used for limiting the axial movement of the roller 2.46; the upper slide seat assembly 2.4 is also provided with a linear displacement detection sensor 2.10, a guide rail of the linear displacement detection sensor 2.10 is arranged on the side surface of the housing frame 2.2, a movable reading head of the linear displacement detection sensor 2.10 is fixed on the roller frame 2.41 through a connecting rod, and the linear displacement detection sensor 2.10 can monitor the up-and-down movement position of the upper slide seat assembly 2.4 in real time and control the upper slide seat assembly 2.4 to stop at a system set position through a control system; the rolling reduction motor 2.43 drives the roller 2.46 to rotate through the roller shaft 2.44; the top of the roller side bracket 2.42 is connected with the top surface of the roller frame 2.41 through bolts, and the bolts can be used for conveniently replacing different roller rollers 2.46; the forming angle of the rolling roller 2.46 is different in each pass, and gradually increases from 0 degree to the forming angle; the forming angle of the rolling roller 2.46 of the first two passes of the inlet of the forming unit 2 is 0 degrees, and the forming unit plays a role of a guide wheel; the forming angles of the rolling roller 2.46 from the 3 rd pass to the 15 th pass are 11 degrees, 22 degrees, 32 degrees, 42 degrees, 51 degrees, 60 degrees, 68 degrees, 75 degrees, 81 degrees, 86 degrees, 89 degrees, 90 degrees and 93 degrees in sequence;

step 1, assembling a workpiece:

Step 2, hoisting:

Step 3, input processing:

step 4, outputting:

In the forming machine set 2 of the embodiment, the rolling is not performed in the 1 st pass and the 2 nd pass, and the forming angle of the workpiece 4 is 0 degrees; rolling the workpiece 4 from the 3 rd pass to the 15 th pass, wherein the forming angles of the cold-formed edges of the workpiece 4 are 11 degrees, 22 degrees, 32 degrees, 42 degrees, 51 degrees, 60 degrees, 68 degrees, 75 degrees, 81 degrees, 86 degrees, 89 degrees, 90 degrees and 93 degrees in sequence;

the running speed of the workpiece 4 of the embodiment is 10.2m/min;

The operation time of the two special vehicle longitudinal beams with the length of 13 meters for one-time rolling cold bending of the forming unit 2 is 76s, the angle of the cold bending surface of the special vehicle longitudinal beam after cold bending forming is consistent, and especially the flatness of the transition part of the variable cross section is good, and the 15-pass gradual rolling has good cold bending deformation effect, low bending rebound rate and improved use performance.

Claims

1. The variable cross-section profiling rolling cold bending equipment is characterized by comprising a feeding roller way (1), a forming unit (2) and a discharging roller way (3), wherein the feeding roller way (1) is arranged at an inlet of the front end of the forming unit (2) and is used for receiving a workpiece (4) to be cold-bent and conveying the workpiece (4) to be cold-bent into the forming unit (2); the forming unit (2) is used for rolling and cold-bending the workpiece (4); the blanking roller way (3) is arranged at an outlet of the tail end of the forming unit (2) and is used for receiving the cold-formed workpiece (4);

The feeding roller way (1) comprises a roller way frame I (1.1), a guide frame I (1.2), a linear guide rail I (1.3), a clamping roller I (1.4), a clamping roller swing arm I (1.5), a clamping roller I (1.6), a gear motor I (1.7), a roller transmission chain I (1.8), a conveying roller I (1.9), a detection sensor I (1.10), a cylinder I (1.11), a triangular rotating rod I (1.12) and a connecting rod I (1.13);

The roller way frame I (1.1) is a frame structure formed by assembling and welding sectional materials; a section of linear guide rail I (1.3) is respectively arranged at two ends of the top surface of the roller way frame I (1.1), a guide frame I (1.2) is arranged on the linear guide rail I (1.3), and the guide frame I (1.2) can move along the linear guide rail I (1.3); two clamping wheel rolling shafts I (1.4) are arranged on two longitudinal sides of the middle of the top surface of the roller way frame I (1.1) in parallel, a plurality of clamping wheel swing arms I (1.5) with two sides being correspondingly and uniformly distributed are sleeved on the two clamping wheel rolling shafts I (1.4), and a clamping wheel I (1.6) is arranged on the inner side of the upper part of each clamping wheel swing arm I (1.5); the lower ends of each pair of clamping wheel swing arms I (1.5) corresponding to the two sides are connected with the two ends of the same triangular rotating rod I (1.12) through a connecting rod I (1.13), and the triangular lower ends of the triangular rotating rods I (1.12) are connected with a cylinder I (1.11); a plurality of uniformly distributed conveying rollers I (1.9) are longitudinally arranged between the two clamping roller shafts I (1.4), and the roller shafts of the conveying rollers I (1.9) are connected with a gear motor I (1.7) through roller transmission chains I (1.8); the two ends of the roller way frame I (1.1) are symmetrically provided with detection sensor brackets, the detection sensor brackets at the two ends are respectively provided with a detection sensor I (1.10), and the detection sensor I (1.10) can be adjusted in position and fixed along the vertical direction of the detection sensor brackets;

The workpiece (4) comprises a variable-section profiling die and a variable-section workpiece, and the upper and lower edges to be cold-bent of the variable-section workpiece are protruded above and below the variable-section profiling die; the variable cross-section profiling die is of a three-layer structure and is divided into an intermediate layer and an outer layer, and variable cross-section workpieces are respectively attached to two sides of the intermediate layer;

When the cold bending flanging directions of the two variable-section workpieces are opposite, an outer layer is attached to the other side of the two variable-section workpieces to form a workpiece (4) with a five-layer structure; when the cold bending flanging directions of the two variable-section workpieces are consistent, an outer layer is not arranged on the other side of the two variable-section workpieces, so that a workpiece (4) with a three-layer structure is formed;

the two variable cross-section workpieces are fixed on the variable cross-section profiling die through clamping bolts, and the clamping bolts do not protrude or protrude on the surfaces of two outer side layers of the variable cross-section profiling die; when the clamping bolts protrude out of the surfaces of two outer layers of the variable-section profiling die, the guide frame I (1.2) moves along the linear guide rail I (1.3) to avoid the clamping bolts of the workpiece (4), so that the clamping bolts of the workpiece (4) do not correspond to the guide frame I (1.2);

when a workpiece (4) is hoisted to a feeding roller way (1) by a hoisting tool, the precision requirement of a hoisting position can be reduced by the guide frame I (1.2), namely when the longitudinal center line of the feeding roller way (1) is deviated to within +/-120 mm during hoisting of the workpiece (4), the workpiece (4) can be smoothly placed in the guide frame I (1.2), and the longitudinal center line of the workpiece (4) is aligned with the longitudinal center line of the roller way frame I (1.1) and is pressed on the conveying roller wheel I (1.9);

The material clamping wheel swing arm I (1.5) is in an outward-opening state initially, when the workpiece (4) is lifted into position, the material clamping wheel swing arm I (1.5) clamps the workpiece (4), then the lifting appliance is loosened, and the workpiece (4) is prevented from tilting when the lifting appliance is loosened;

The detection sensor I (1.10) is used for detecting whether the workpiece (4) is lifted in place, when the detection sensor I (1.10) detects that the workpiece (4) is lifted in place, the detection sensor I (1.10) sends a signal instruction, the driving cylinder I (1.11) stretches and drives the triangular rotating rod I (1.12) to rotate, the connecting rod I (1.13) is driven to adjust the clamping roller I (1.4) on two sides to rotate, the clamping roller I (1.4) drives the clamping roller swing arm I (1.5) to adjust and clamp, the clamping roller I (1.6) corrects and clamps the workpiece (4) to prevent the workpiece (4) from inclining towards two sides, the workpiece (4) is ensured to be always kept in a vertical state, and the longitudinal center line of the workpiece (4) coincides with the longitudinal center line of the feeding roller way (1);

The conveying rollers I (1.9) are connected through chain wheels, the gear motor I (1.7) drives the conveying rollers I (1.9) to rotate at the same time, and workpieces (4) to be subjected to cold bending are conveyed to enter the forming unit (2);

the forming unit (2) is formed by online N-pass single cold bending machines, N is more than or equal to 12, each pass of single cold bending machine comprises a base (2.1), a housing frame (2.2), an upper cover plate (2.3), an upper slide seat assembly (2.4), a lower slide seat assembly (2.5), an upper oil cylinder (2.6), a lower oil cylinder (2.7) and a linear guide rail (2.8);

the base (2.1) is a bearing member of all parts, the two longitudinal sides of the base (2.1) are provided with housing frames (2.2), the tops of the housing frames (2.2) are provided with upper cover plates (2.3), and the base (2.1), the housing frames (2.2) and the upper cover plates (2.3) jointly form a rectangular frame structure of the machine body; the two sides of the inner side surface of the housing frame (2.2) is respectively provided with a linear guide rail (2.8), the two sides of the linear guide rail (2.8) are respectively provided with an upper sliding block and a lower sliding block, the two sides of the upper sliding block are fixedly connected with an upper sliding seat assembly (2.4), the two sides of the lower sliding block are fixedly connected with a lower sliding seat assembly (2.5), and the upper sliding seat assembly (2.4) and the lower sliding seat assembly (2.5) can move up and down along the linear guide rail (2.8); the top of the upper sliding seat assembly (2.4) is connected with the rod end of the upper oil cylinder (2.6), and the cylinder body of the upper oil cylinder (2.6) is fixed on the upper cover plate (2.3); the upper oil cylinder (2.6) provides power for the upper sliding seat assembly (2.4) to move up and down and downward pressure applied to the workpiece (4); the bottom of the lower slide seat assembly (2.5) is connected with the rod end of a lower oil cylinder (2.7), the cylinder body of the lower oil cylinder (2.7) is fixed on the base (2.1), and the lower oil cylinder (2.7) provides power for the lower slide seat assembly (2.5) to move up and down and upward pressure applied to the workpiece (4);

The upper sliding seat assembly (2.4) comprises a roller frame (2.41), a roller side bracket (2.42), a rolling reduction motor (2.43), a roller shaft (2.44), a roller baffle ring (2.45) and a rolling roller (2.46);

The roller frame (2.41) is of a four-sided box type structure, the top surface of the roller frame (2.41) is provided with lugs connected with an upper oil cylinder (2.6), the front and rear surfaces of the roller frame (2.41) are provided with arc-shaped openings for a workpiece (4) to pass through, the outer side of the left surface of the roller frame (2.41) is provided with a rolling reduction motor (2.43), the rolling reduction motor (2.43) is connected with a roller shaft (2.44) penetrating through the left surface of the roller frame (2.41), and a bearing is arranged at the left surface section of the roller shaft (2.44) penetrating through the roller frame (2.41); a roller side bracket (2.42) is arranged on the inner side of the right surface of the roller frame (2.41); the other end of the roller shaft (2.44) is connected with a roller side bracket (2.42), and a bearing is arranged at the joint of the roller shaft (2.44) and the roller side bracket (2.42); the roller shaft (2.44) is sleeved with a roller (2.46); one end of a roller side bracket (2.42) of the roller shaft (2.44) is sleeved with a roller retainer ring (2.45), and the roller retainer ring (2.45) is used for limiting the axial movement of the roller (2.46);

The upper slide seat assembly (2.4) is also provided with a linear displacement detection sensor (2.10), a guide rail of the linear displacement detection sensor (2.10) is arranged on the side surface of the housing frame (2.2), a movable reading head of the linear displacement detection sensor (2.10) is fixed on the roller frame (2.41) through a connecting rod, and the linear displacement detection sensor (2.10) can monitor the up-and-down movement position of the upper slide seat assembly (2.4) in real time and control the upper slide seat assembly (2.4) to stop at a position set by the system through a control system;

the lower slide seat assembly (2.5) has the same structure as the upper slide seat assembly (2.4); the upper slide seat assembly (2.4) and the lower slide seat assembly (2.5) are symmetrically arranged up and down to form a rolling pass;

The upper sliding seat assembly (2.4) or the lower sliding seat assembly (2.5) is characterized in that two detection sensor brackets are further arranged on the upper portion of a roller frame, a proximity sensor (2.9) is arranged on each detection sensor bracket, the proximity sensor (2.9) is used for detecting the position of a workpiece (4) relative to a roller and roller wheel, a signal is sent to a control system aiming at the linear displacement position of the workpiece (4) in a forming unit (2), and the control system drives the upper sliding seat assembly (2.4) and the lower sliding seat assembly (2.5) to ascend, descend, stop or self-lock and start or stop of the roller and roller wheel.

2. A variable cross-section profiling rolling cold bending apparatus as claimed in claim 1, characterized in that the rolling speed reduction motor (2.43) drives the roller (2.46) to rotate through the roller shaft (2.44);

The top of the roller side support (2.42) is connected with the top surface of the roller frame (2.41) through bolts, and the bolts can be used for conveniently replacing different roller rollers (2.46).

3. A variable cross-section profiling rolling cold-rolling device according to claim 1 or 2, characterized in that the forming unit (2) is 15 passes, the forming angles of the rolling rollers (2.46) of each pass being different, gradually increasing from 0 ° to forming angles; the forming angle of the rolling roller (2.46) of the first two passes of the inlet of the forming unit (2) is 0 degrees, and the forming unit plays a role of a guide wheel; the forming angles of the rolling rollers (2.46) of the 3 rd pass to the 15 th pass are 11 degrees, 22 degrees, 32 degrees, 42 degrees, 51 degrees, 60 degrees, 68 degrees, 75 degrees, 81 degrees, 86 degrees, 89 degrees, 90 degrees and 91 degrees to 95 degrees in sequence.

4. The variable cross-section profiling rolling cold bending equipment according to claim 1, wherein the blanking roller way (3) comprises a roller frame II (3.1), a clamping roller II (3.2), a clamping roller swing arm II (3.3), a clamping roller II (3.4), a gear motor II (3.5), a roller transmission chain II (3.6), a conveying roller II (3.7), a proximity sensor II (3.8), a cylinder II (3.9), a triangular rotating rod II (3.10) and a connecting rod II (3.11);

The roller way frame II (3.1) is a frame structure formed by assembling and welding sectional materials; two clamping wheel rolling shafts II (3.2) are arranged on two longitudinal sides of the middle of the top surface of the roller way frame II (3.1) in parallel, a plurality of clamping wheel swing arms II (3.3) with two sides being correspondingly and uniformly distributed are sleeved on the two clamping wheel rolling shafts II (3.2), and a clamping wheel II (3.4) is arranged on the inner side of the upper part of each clamping wheel swing arm II (3.3); the lower ends of each pair of clamping wheel swing arms II (3.3) corresponding to the two sides are connected with the two ends of the same triangular rotating rod II (3.10) through a connecting rod II (3.11), and the triangular lower ends of the triangular rotating rods II (3.10) are connected with a cylinder II (3.9); a plurality of uniformly distributed conveying rollers II (3.7) are longitudinally arranged between the two clamping roller shafts II (3.2), and the roller shafts of the conveying rollers II (3.7) are connected with a speed reduction motor II (3.5) through roller transmission chains II (3.6); 2-8 detection sensor brackets are arranged from the middle part to the tail end of the roller way frame II (3.1), the distance between every two adjacent detection sensor brackets is equal to the center distance of two adjacent single-pass cold bending machines of the forming unit (2), each detection sensor bracket is provided with a proximity sensor II (3.8), and the position of each proximity sensor II (3.8) can be adjusted and fixed along the longitudinal direction of the detection sensor bracket;

the proximity sensor II (3.8) is used for detecting and judging the linear displacement state of the workpiece (4), sending a signal to the control system aiming at the linear displacement position of the workpiece (4) on the blanking roller way (3), and driving the upper slide seat assembly (2.4) and the lower slide seat assembly (2.5) to ascend, descend, stop or self-lock by the control system, and starting or stopping the rolling roller wheels;

The initial state of clamp material wheel swing arm II (3.3) is the adduction state, takes place to empty when preventing work piece (4) after the cold bending shaping entering unloading roll table (3), and work piece (4) after the cold bending shaping is hung away by the hoist and is pressed from both sides material wheel swing arm II (3.3) and stretch out, and work piece (4) after the convenient cold bending shaping hangs out.

5. A variable cross-section profiling rolling cold bending processing method, which uses the variable cross-section profiling rolling cold bending equipment as claimed in claim 1, and is characterized in that the processing method comprises the following steps:

step 1, assembling a workpiece:

Two variable cross-section workpieces are fixed on two sides of a variable cross-section profiling die through clamping bolts to form a workpiece (4);

Step 2, hoisting:

The method comprises the steps that a workpiece (4) is hoisted into a feeding roller way (1) through a hoisting tool, the position and the inclination of the workpiece (4) are adjusted through a guide frame I (1.2) and a clamping wheel I (1.6), and the workpiece (4) is guaranteed not to deviate or incline;

Step 3, input processing:

Starting a forming unit (2), and gradually conveying the workpiece (4) into the forming unit (2) through a conveying roller I (1.9) to roll the upper edge and the lower edge of the variable-section workpiece;

The upper oil cylinder (2.6) and the lower oil cylinder (2.7) of each single cold bending machine work or stop at the same time, the upper oil cylinder (2.6) and the lower oil cylinder (2.7) of each single cold bending machine start to gradually intervene in rolling work from the inlet of the forming unit (2), and the time for the N single cold bending machines to reach the simultaneous working state is 5-8 s; then, starting from the inlet of the forming unit (2), gradually stopping rolling;

step 4, outputting:

the workpiece (4) is continuously rolled and gradually output to the blanking roller way (3) from the outlet of the forming unit (2), and when the workpiece (4) is completely output to the blanking roller way (3), the workpiece (4) after cold bending forming is formed.

6. The variable cross-section profiling rolling cold bending processing method according to claim 5, wherein in the step 3, the cylinder diameters of the upper cylinder (2.6) and the lower cylinder (2.7) are 80-140 mm, the stroke of the upper cylinder (2.6) is less than or equal to 500mm, and the stroke of the lower cylinder (2.7) is less than or equal to 200mm; the maximum retraction speed of the upper oil cylinder (2.6) is less than or equal to 250mm/s, and the maximum retraction speed of the lower oil cylinder (2.7) is less than or equal to 250mm/s; the pressure heads of the upper oil cylinder (2.6) and the lower oil cylinder (2.7) are equal to the surface pressure of the workpiece (4).

7. The variable cross-section profiling rolling cold bending processing method according to claim 5 or 6, characterized in that in step 3, the running speed of the workpiece (4) is more than 10 m/min;

the operation time of the forming unit (2) for rolling and cold bending two 13 m long workpieces (4) at one time is less than 80s.