Gradual change forming device of automobile sheet metal part

Abstract

The invention relates to the technical field of automobile sheet metal part machining devices, in particular to an automobile sheet metal part gradient forming device which comprises a rack and at least one rolling mechanism arranged on the rack, the rolling mechanism comprises oppositely-arranged pressing rollers, a rolling gap is formed between the pressing rollers, and the rolling gap is arranged between the pressing rollers. The rolling mechanism further comprises a driving mechanism used for driving the pressing rollers to be close to or away from each other. The rotating sleeve is driven to rotate through the rack-gear, and the vertical displacement of the compression roller is converted into the horizontal displacement of the plug rod by utilizing the matching of the spiral chute and the guide post, so that the effective volume of the infusion tube is continuously changed. When the downward pressing amount (namely rolling pressure) of the pressing roller is increased, the plug rod moves towards the interior of the infusion tube, and under the condition that an external infusion pump provides constant pressure, the internal volume of the infusion tube is forced to be reduced, so that the pressure of liquid in the infusion tube is instantly increased. The increased pressure promotes an increase in the flow rate of the emulsion ejected from the nozzle per unit time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile sheet metal part processing devices, and particularly relates to a gradual forming device for automobile sheet metal parts. BACKGROUND

[0002] Gradual forming (such as rolling) of automobile sheet metal parts is one of the key processes in automobile manufacturing, and its purpose is to roll the sheet metal into parts with gradually changing thickness or specific shapes to meet the requirements of vehicle body structure strength, lightweight and aesthetics, etc. In this forming process, one or more pairs of pressure rollers are usually used to continuously roll the sheet metal. In order to ensure the rolling quality, reduce friction, reduce roller wear and control the temperature of the sheet metal, it is necessary to apply an appropriate amount of lubricating and cooling medium (such as emulsion) in the rolling area.

[0003] However, the traditional lubricating and cooling supply method usually uses a fixed flow or flow adjustment based on simple open-loop control. In the gradual rolling of automobile sheet metal parts, due to the existence of the thickness gradually changing area of the sheet metal, the pressure, heat generated and friction conditions of different sections during rolling are significantly different: in the area where the sheet metal is thicker, the required forming pressure is relatively small, but sufficient lubrication is still needed to avoid scratching; in the area where the sheet metal is thinner or transitional, the rolling pressure increases sharply, and the heat generated by friction is more serious, requiring a stronger and more stable oil film for protection and cooling; in the transition area where the thickness changes, the lubrication demand is also in a state of continuous change. If a constant lubrication supply is used, it is easy to cause surface scratching, color difference, overheating or even abnormal wear of the roller in the high-pressure thin area due to insufficient lubrication; while in the low-pressure thick area, it may cause waste due to excessive lubrication, and too much medium may affect the stability of the rolling process. Although there are some systems that adjust the flow according to the rolling speed or simple signals, they often have difficulty in quickly responding to transient and local pressure changes, and it is difficult to achieve micro-lubrication adjustment that dynamically matches the rolling pressure.

[0004] In addition, the spray hole size of the traditional spray head is usually fixed, or needs to be adjusted by an external independent motor or pneumatic element, which has a lagging response and is difficult to achieve rapid and synchronous self-adaptive changes of the spray hole size according to the pressure fluctuations during rolling. This further limits the ability to form a strong and tough oil film in the high-pressure area. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a gradual forming device for automobile sheet metal parts to solve the technical problems in the prior art.

[0006] Based on the above purpose, the present application provides a gradual forming device for automobile sheet metal parts, comprising a rack and at least one rolling mechanism arranged on the rack, the rolling mechanism comprising oppositely arranged pressure rollers, a rolling gap being formed between the pressure rollers, the rolling mechanism further comprising a driving mechanism for driving the pressure rollers to move closer to or away from each other; the forming device further comprising: at least one liquid delivery pipe arranged on one side of the pressure roller; at least one piston arranged in the liquid delivery pipe, the piston being in sliding connection with the inner wall of the liquid delivery pipe and separating the liquid delivery pipe into a first space and at least one second space; a driving part for driving the piston to slide in the liquid delivery pipe to change the volume of the first space and the second space; a plurality of nozzles arranged on the liquid delivery pipe, the nozzles being in communication with the first space; a liquid delivery pump in communication with the first space, the liquid delivery pump being used to provide the first space with emulsion with constant hydraulic pressure.

[0007] Preferably, the forming device further comprises: a motor with an output shaft fixedly connected to one end of the pressure roller, both ends of the pressure roller being provided with bearing seats, the motor being fixed to one of the bearing seats, the bearing seats at both ends of one of the pressure rollers being fixed to the inner wall of the rack, and the pressure roller being a force roller, the bearing seats at both ends of the other pressure roller being in sliding connection with a sliding groove arranged on the inner wall of the rack, and the pressure roller being a pressure roller; the driving mechanism comprising a hydraulic cylinder with an output shaft fixedly connected to the bearing seat of the pressure roller, the hydraulic cylinder being fixed to the rack.

[0008] Preferably, two pistons are arranged in the liquid delivery pipe and are close to both ends of the liquid delivery pipe, the space between the two pistons being the first space, the space between the piston and the end of the corresponding liquid delivery pipe being the second space, and the forming device further comprising: a plug rod fixed to the end of the piston, the plug rod penetrating the end of the liquid delivery pipe; a connecting piece corresponding to the plug rod, the connecting piece being fixedly connected to the rack and the liquid delivery pipe, one side of the connecting piece being provided with a sleeve ring, the sleeve ring being provided with a positioning groove penetrating the inner and outer surfaces thereof; a rotating sleeve in rotational connection with the sleeve ring, the outer surface of the rotating sleeve being in rotational connection with the inner surface of the sleeve ring, the rotating sleeve being provided with a helical inclined groove penetrating the inner and outer surfaces thereof, the side surface of the plug rod being in sliding connection with the inner surface of the rotating sleeve; a guide column arranged on the side surface of the plug rod, the guide column penetrating the helical inclined groove and the positioning groove and being in sliding connection with the helical inclined groove and the positioning groove, respectively.

[0009] A gear wheel is arranged on the rotating sleeve and a rack is engaged with the gear wheel, and the rack is fixedly connected with the bearing seat of the pressure roller.

[0010] Preferably, a guiding support is slidably connected with the bottom of the rack, and the guiding support is fixedly connected with the bearing seat of the stress roller.

[0011] Preferably, two infusion tubes are arranged, and the infusion tubes are arranged on the upper and lower sides of the rolling gap, and the spray head is arranged obliquely and the oblique direction is towards the rolling gap.

[0012] Preferably, the gradual forming device further comprises an adjusting mechanism for adjusting the caliber of the spray head, and the adjusting mechanism comprises: An active rod is fixedly connected with the guiding column and located at the outer end of the connecting piece, equidistantly fixed with connecting rods corresponding to the spray heads along the length direction, and the connecting rods are hingedly installed with hinged rods away from the active rod; A fixed ring is fixedly arranged on the inner wall of the spray head nozzle, and a plurality of first guiding grooves in curve shape are equidistantly arranged on the fixed ring along the circumferential direction thereof; A plurality of sector blades are arranged around the central axis of the spray head nozzle, and the sector blades are slidably installed in the corresponding first guiding grooves through a pin, so that the inner side edges of the plurality of sector blades collectively enclose a central spray hole with adjustable size; A control ring is rotatably arranged on the outer wall of the front end of the spray head, and the outer peripheral wall of the control ring is hingedly installed with the hinged rods, and a plurality of second guiding grooves are arranged on the inner wall of the control ring along the radial direction thereof, and the outer side of the sector blades is fixedly arranged with sliding strips slidably matched with the second guiding grooves.

[0013] Preferably, the second guiding grooves are straight grooves, and when the control ring rotates relative to the fixed ring, the sliding strips are slidably matched with the second guiding grooves and the pin is slidably matched with the first guiding grooves, so as to drive all the sector blades to synchronously move radially to change the size of the central spray hole.

[0014] Preferably, the spray hole adjusting mechanism further comprises a detachable connecting assembly arranged between the control ring and the hinged rod, and the detachable connecting assembly comprises: A guiding block is hingedly connected with the hinged rod, and an active groove is arranged in the inner part of the guiding block, and a limiting pin is slidably installed in the active groove; A spring is fixedly arranged in the active groove, and one end of the spring is fixedly installed at one end of the limiting pin; A connecting block is fixedly arranged on the outer peripheral wall of the control ring, and a recess is arranged on the top wall of the connecting block, and the other end of the limiting pin extends into the recess.

[0015] Preferably, the end of the extending end of the limiting pin is in arc shape matched with the shape of the recess.

[0016] Preferably, an annular guide groove is formed in the outer peripheral wall of the control ring, and a sliding key that is in sliding fit with the annular guide groove is fixedly arranged on the guide block.

[0017] The beneficial effects of the present application: the gradual forming device for automobile sheet metal parts of the present application, through rack and pinion drive rotating sleeve rotation, and using the helical chute and guide column cooperation with the vertical displacement of the pressure roller into the horizontal displacement of the plug rod, so as to continuously change the effective volume of the infusion tube. When the pressure roller down pressure (i.e. rolling pressure) increases, the plug rod moves to the inside of the infusion tube, under the condition of constant pressure provided by the external infusion pump, the internal volume of the infusion tube is forced to shrink, resulting in the internal liquid pressure of the infusion tube increases momentarily. The increased pressure promotes the flow of emulsion from the nozzle in unit time. The rolling pressure signal is directly and mechanically converted into a flow control signal, which realizes the supply of appropriate lubrication when the pressure is low in the thick area of the plate, and automatically and instantly increases the injection flow and pressure to form a stronger and more stable oil film when the pressure is high in the thin area. The problems of scratching, overheating and roll wear caused by insufficient lubrication in the high pressure area of the traditional fixed flow or response lag system are solved.

[0018] The nozzle adjusting mechanism and the pressure in the infusion tube realize homologous drive and synchronous response. When the rolling pressure increases and needs to increase lubrication, the nozzle opening degree increases slightly, which not only prevents the pipe pressure from being too high, but also optimizes the shape of the injection flow, so that the emulsion can act more uniformly and better cover the contact arc area of the roller and the plate. Conversely, when the pressure decreases, the nozzle decreases slightly, matching the reduced flow, and maintaining the accuracy of the injection. This dynamic nozzle adjustment cooperates with the change of the flow to ensure that the optimal lubrication film state and cooling effect can be obtained in different rolling pressure intervals, further avoiding the problem of waste caused by excessive lubrication in the low pressure area.

[0019] Through the detachable connecting assembly provided in the nozzle adjusting mechanism, when the fan-shaped blade is blocked by impurities and the transmission is blocked, the articulated rod and the connecting block can be automatically disconnected, so as to cut off the transmission chain and prevent the whole adjusting mechanism from being damaged due to overload, thereby improving the reliability and service life of the device. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only a part of the present application, and other drawings can also be obtained by those skilled in the art without creating any inventive labor.

[0021] Figure 1 It is the front view of the present application; Figure 2Right view of the present application; Figure 3 Right view of the present application; Figure 2 Enlarged view of structure at A in the present application; Figure 4 Enlarged view of structure at A in the present application; Figure 5 Right view of the present application; Figure 4 Enlarged view of structure at B in the present application; Figure 6 Right view of the present application; Figure 7 Right view of the present application; Figure 6 Enlarged view of structure at C in the present application; Figure 8 Right view of the present application; Figure 9 Right view of the present application; Figure 8 Enlarged view of structure at D in the present application; Figure 10 Right view of the present application; Figure 8 Enlarged view of structure at E in the present application; Figure 11 Right view of the present application; Figure 12 Right view of the present application; Figure 13 Right view of the present application; Figure 12 Enlarged view of structure at F in the present application; Figure 14 Right view of the present application; Figure 15 Right view of the present application; Figure 14 Right view of the present application.

[0022] Marked as: 1, frame; 101, hydraulic cylinder; 102, sliding groove; 2, compression roller; 3, liquid delivery pipe; 4, piston; 5, spray head; 6, motor; 7, bearing seat; 8, plug rod; 801, connecting piece; 802, collar; 803, positioning groove; 9, rotating sleeve; 901, helical chute; 10, guide column; 11, gear; 12, rack; 13, movable rod; 14, connecting rod; 15, articulated rod; 16, fixed ring; 1601, first guide groove; 17, pin; 18, fan-shaped blade; 1801, sliding bar; 19, control ring; 1901, second guide groove; 1902, annular guide groove; 20, guide block; 2001, movable groove; 21, limit pin; 22, spring; 23, connecting block; 2301, recess. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] In a first aspect, the present invention provides a gradient forming device for automotive sheet metal parts, such as... Figures 1-15 As shown, the apparatus includes a frame 1 and at least one rolling mechanism mounted on the frame 1. The rolling mechanism includes opposing pressure rollers 2, with a rolling gap formed between the pressure rollers 2. The rolling mechanism also includes a drive mechanism for driving the pressure rollers 2 closer together or further apart. The forming device further includes: At least one infusion pipe 3 is provided on one side of the pressure roller 2; At least one piston 4 is disposed inside the infusion tube 3, the piston 4 is slidably connected to the inner wall of the infusion tube 3, and isolates the infusion tube 3 into a first space and at least one second space; The driving part is used to drive the piston 4 to slide inside the infusion tube 3 to change the volume of the first space and the second space; the sliding fit between the piston 4 and the end of the infusion tube 3 is provided with a double O-ring sealing structure, specifically: two annular sealing grooves are opened on the inner wall of the end of the infusion tube 3, and O-rings (made of emulsion-resistant nitrile rubber) are embedded in the sealing grooves. The distance between the two sealing grooves is 5-8mm to ensure that there is no leakage of emulsion when the piston 4 slides axially.

[0026] Multiple nozzles 5 are installed on the infusion tube 3, and the nozzles 5 are connected to the first space; An infusion pump connected to the outlet of the first space is used to supply a hydraulically constant emulsion into the first space. A hose connects to the middle of infusion line 3, providing a stable pressure and flow rate to ensure a continuous source of emulsion for the system. Specifically, the middle part of the infusion tube 3 is connected with the outlet of the external infusion pump through a high-pressure rubber hose, and the two ends of the hose are respectively fastened with the infusion tube 3 and the infusion pump interface by using a clamping sleeve connector, the material of the clamping sleeve is stainless steel, and the sealing performance of the connection is ensured. The infusion pump selects a constant pressure variable pump, the output pressure adjustment range is 0.5-2.0 MPa, and the infusion tube 3 is made of stainless steel.

[0027] In the embodiment, the forming device further comprises: The motor 6 is fixedly connected with the output shaft and one end of the compression roller 2, the two ends of the compression roller 2 are provided with bearing seats 7, and the motor 6 is fixed to one of the bearing seats 7; the bearing seats 7 at the two ends of one of the compression rollers 2 are fixed to the inner wall of the rack 1, and the compression roller 2 is a force roller; the bearing seats 7 at the two ends of the other compression roller 2 are in sliding connection with the sliding groove 102 arranged on the inner wall of the rack 1, and the compression roller 2 is a pressure roller. The driving mechanism comprises hydraulic cylinders 101 fixedly connected with the bearing seats 7 of the output shaft and the pressure roller, and the hydraulic cylinders 101 are fixed to the rack 1. The two hydraulic cylinders 101 are synchronous hydraulic cylinders 101.

[0028] In the embodiment, the piston 4 in the infusion tube 3 is provided with two, and is respectively close to the two ends of the infusion tube 3, the infusion tube space between the two pistons 4 is a first space, the infusion tube space between the piston 4 and the end of the corresponding infusion tube 3 is a second space, and the forming device further comprises: A plug rod 8 is fixedly connected with the end of the piston 4, and the plug rod 8 penetrates the end of the infusion tube 3; A connecting piece 801 corresponding to the plug rod 8, the connecting piece 801 is fixedly connected with the rack 1 and the infusion tube 3 respectively, one side of the connecting piece 801 is provided with a sleeve ring 802, and the sleeve ring 802 is provided with a positioning groove 803 penetrating the inner and outer surfaces thereof; A rotating sleeve 9 in rotational connection with the sleeve ring 802, the outer surface of the rotating sleeve 9 is in rotational connection with the inner surface of the sleeve ring 802, the rotating sleeve 9 is provided with a helical inclined groove 901 penetrating the inner and outer surfaces thereof, and the side surface of the plug rod 8 is in sliding connection with the inner surface of the rotating sleeve 9; it should be noted that the sliding section surface of the plug rod 8 is plated with chromium to reduce the sliding friction and improve the sealing performance, and the total volume of the section of the infusion tube 3 can be flexibly adjusted by changing the positions of the plug rods 8 at the two ends; in addition, the two end outer walls of the rotating sleeve 9 and the inside of the sleeve ring 802 are rotatably installed through bearings, which can further improve the stability of the rotation of the rotating sleeve 9.

[0029] A guide column 10 is arranged on the side surface of the plug rod 8, the guide column 10 penetrates the helical inclined groove 901 and the positioning groove 803, and is in sliding connection with the helical inclined groove 901 and the positioning groove 803 respectively.

[0030] A gear 11 is arranged on the rotating sleeve 9, and a rack 12 engaged with the gear 11, the rack 12 is fixedly connected with the bearing seat 7 of the pressure roller.

[0031] In operation, sheet metal is fed between the two pressure rollers 2. When the hydraulic cylinder 101 drives the pressure roller to press down on the sheet metal for gradual forming, the bearing seat 7 on the pressure roller moves downward, driving the rack 12 to move downward synchronously. The downward movement of the rack 12 drives the upper gear 11 and the lower gear 11 to rotate. The gear 11 drives the rotating sleeve 9 to rotate. Since the guide column 10 is limited from rotating by the positioning groove 803, the side surface of the helical chute 901 on the rotating sleeve 9 pushes the guide column 10, forcing the piston 4 at the end of the plug rod 8 to move towards the inside of the delivery pipe 3, thereby changing the effective volume inside each delivery pipe 3. The more the pressure roller is pressed down (the greater the forming pressure is), the greater the displacement of the plug rod 8 is, and the greater the volume change is, so as to realize that the supply amount increases with the increase of the pressure, dynamically fine-tune the supply amount of the emulsion in the delivery pipe 3, and ensure that the automobile sheet metal part is provided with sufficient lubrication in the thick area during rolling, forms a stronger oil film in the thin area under high pressure and high temperature, realizes smooth transition in the transition area, avoids sudden change of lubrication, maximizes the surface defects (such as scratches and color difference) caused by uneven lubrication, and stabilizes the friction coefficient, thereby improving the thickness control precision and the sheet shape quality. The same applies to the reverse movement.

[0032] In this embodiment: the bottom of the rack 12 is slidingly connected with a guide bracket, and the guide bracket is fixedly connected with the bearing seat 7 of the force roller. Through the guide bracket, the stability of the movement of the rack 12 is improved.

[0033] In this embodiment: two delivery pipes 3 are arranged, and the delivery pipes 3 are located on the upper and lower sides of the rolling gap, the spray head 5 is inclinedly arranged, and the inclination direction is towards the rolling gap. In this way, the emulsion can accurately cover the frictional contact surface.

[0034] In this embodiment: the gradual forming device further comprises an adjusting mechanism for adjusting the caliber of the spray head 5, and the adjusting mechanism comprises: An active rod 13 is fixedly connected to the guide column 10 and located at one end outside the connecting piece 801, equidistantly fixed with a connecting rod 14 corresponding to each spray head 5 along the length direction of the active rod 13, and the connecting rod 14 is hingedly installed with a hinged rod 15 away from the active rod 13; through further optimization, a positioning sleeve is slidingly installed at both ends of the connecting rod 14, and the positioning sleeve is fixedly installed on the surface of the corresponding connecting piece 801 at the bottom, in addition, a plurality of rolling balls are rollingly installed equidistantly along the circumference of the inner circle of the positioning sleeve, and the rolling balls are in close contact with the outer wall of the connecting rod 14, thereby improving the stability of the movement of the connecting rod 14 and reducing the friction of the movement of the connecting rod 14.

[0035] A fixed ring 16 is fixedly arranged on the inner wall of the nozzle of the spray head 5, and a plurality of first guide grooves 1601 in a curved shape are equidistantly arranged on the fixed ring 16 along the circumferential direction thereof; A plurality of sector blades 18 are arranged around the center axis of the nozzle 5, and the sector blades 18 are slidably installed in corresponding first guide grooves 1601 by a pin 17, so that the inner side edges of the plurality of sector blades 18 jointly enclose a center spray hole with adjustable size; Specifically, the number of sector blades 18 is six, which are evenly distributed in the circumferential direction of the fixed ring 16, and the edges of adjacent sector blades 18 are matched in a lap joint manner with a lap joint gap of 0.1-0.2 mm to avoid leakage of emulsion from the gap. The curvature radius of the curved first guide groove 1601 on the fixed ring 16 is 15-20 mm, and the gap between the width of the guide groove and the diameter of the pin 17 is 0.05-0.1 mm, which ensures smooth sliding of the pin 17 without radial deviation. The inner side edges of the sector blades 18 are arc-shaped and have the same curvature as the inner wall curvature of the nozzle 5, and the center spray hole enclosed by the inner side edges has a size of 5 mm-15 mm.

[0036] A control ring 19 is rotatably sleeved on the front end outer wall of the nozzle 5, and the outer peripheral wall of the control ring 19 is hingedly installed with the hinge rod 15. A plurality of second guide grooves 1901 are formed in the inner wall of the control ring 19 in the radial direction thereof, and the outer side of the sector blade 18 is fixedly provided with a sliding bar 1801 which slidably cooperates with the second guide groove 1901. It should be noted that the inner wall of the control ring 19 and the outer wall of the nozzle 5 are rotatably installed through a sealing bearing, which improves the sealing performance of the control ring 19 and the nozzle 5 and improves the stability of the rotation of the control ring 19.

[0037] In this embodiment, the second guide groove 1901 is a straight groove. When the control ring 19 rotates relative to the fixed ring 16, the sliding cooperation of the sliding bar 1801 with the second guide groove 1901 and the sliding cooperation of the pin 17 with the first guide groove 1601 drive all the sector blades 18 to move radially synchronously to change the size of the center spray hole.

[0038] In this embodiment, the nozzle adjusting mechanism further comprises a detachable connecting assembly arranged between the control ring 19 and the hinge rod 15, and the detachable connecting assembly comprises: A guide block 20 is hingedly connected to the hinge rod 15, and an active groove 2001 is formed in the interior of the guide block 20, and a limiting pin 21 is slidably installed in the active groove 2001; A spring 22 is fixed in the active groove 2001, and one end of the spring 22 is fixedly installed on one end of the limiting pin 21; A connecting block 23 is fixed to the outer peripheral wall of the control ring 19, and a recess 2301 is formed in the top wall of the connecting block 23, and the other end of the limiting pin 21 extends into the recess 2301.

[0039] When the plug rod 8 moves due to the pressure roller pressing (corresponding to the need to increase the flow), the guide column 10 moves and drives the movable rod 13 and the connecting rod 14 to move horizontally in the direction of the plug rod 8. The connecting rod 14 pulls the connecting block 23 through the hinged rod 15 and the detachable connecting assembly. The connecting block 23 drives the control ring 19 to rotate around the axis of the nozzle 5. The rotation of the control ring 19 causes the slot wall of the linear second guide groove 1901 on the inner wall of the control ring 19 to generate a radial thrust on the sliding strip 1801 on the sector-shaped blade 18. At the same time, the pin 17 on the back of the sector-shaped blade 18 is constrained by the curved first guide groove 1601 on the fixed ring 16. Under the combined action of the two guides, all the sector-shaped blades 18 slide synchronously to the radial outside of the central axis, so that the central nozzle opening formed by the inner edges of the sector-shaped blades 18 slightly increases. Conversely, when the plug rod 8 moves outward, through a series of reverse transmissions, all the sector-shaped blades 18 slide towards the center, and the central nozzle opening slightly decreases. The nozzle size continuously and synchronously changes with the displacement of the plug rod 8 (i.e. the position of the pressure roller), achieving self-adaptive adjustment of the nozzle 5 outlet size, realizing the coordinated improvement of "pressure" and "flow", and effectively preventing the thin area from being insufficiently lubricated, causing roll wear, plate surface scratches and overheating, thereby automatically converting the rolling pressure signal into the most suitable emulsion supply parameter, achieving efficient, energy-saving and self-adaptive lubrication cooling.

[0040] Wherein, in the normal working state, the end of the limit pin 21 is clamped into the groove 2301 under the action of the spring 22; when the tension of the hinged rod 15 exceeds the preset threshold, the limit pin 21 can overcome the elastic force of the spring 22 and be detached from the groove 2301.

[0041] The spring 22 is selected as a cylindrical helical compression spring, the material is 65Mn, the elastic coefficient k=5-8N / mm, and the pre-compression amount during installation is 5mm, and the corresponding pre-tightening force is 25-40N. The pre-tightening force is the preset threshold of the tension of the hinged rod 15. The end of the protruding end of the limit pin 21 has an arc radius of 4mm, which is matched with the arc radius of the groove 2301, so as to ensure stable clamping and smooth disengagement.

[0042] When the sector-shaped blades 18 are stuck due to impurities in the nozzle 5, if the piston rod 8 continues to move, the tension on the hinged rod 15 will increase dramatically. When the tension exceeds the pre-tightening force of the spring 22, the limit pin 21 will be pulled out of the groove 2301, so that the hinged rod 15 is disconnected from the connecting block 23, thereby cutting off the transmission and protecting the nozzle adjusting mechanism from damage due to overload, thereby improving the reliability and service life of the device.

[0043] In the embodiment, the end of the protruding end of the limit pin 21 is arc-shaped and matched with the shape of the groove 2301.

[0044] In the embodiment, the outer peripheral wall of the control ring 19 is provided with an annular guide groove 1902, and the guide block 20 is fixedly provided with a sliding key in sliding cooperation with the annular guide groove 1902.

[0045] In normal operation, the limiting pin 21 is clamped into the groove 2301 under the action of the spring 22, thereby achieving the rigid connection between the guide block 20 and the connecting block 23.

[0046] The guide block 20 is provided with a sliding key embedded in the annular guide groove 1902 of the outer peripheral wall of the control ring 19, so that the guide block 20 can move circumferentially with the connecting block 23, thereby enhancing the stability of the connection between the guide block 20 and the control ring 19; and the guide block 20 can also slide along the annular guide groove 1902, so that when the hinged rod 15 drives the guide block 20 to deflect when the fan-shaped blade 18 is stuck, the limiting pin 21 on the guide block 20 can smoothly disengage from the clamping of the connecting block 23 fixed on the outer peripheral wall of the control ring 19, and is not interfered.

[0047] It should be understood by those skilled in the art that the above discussion of any embodiment is only exemplary and is not intended to imply that the scope (including claims) of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above. In order to be brief, they are not provided in details.

[0048] The present application is intended to cover all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Accordingly, any and all such modifications, variations, permutations, improvements, and the like are intended to be included within the scope of the present application. Therefore, it is intended that the application be construed as including all such modifications, variations, permutations, improvements, and the like as fall within the scope of the present application.

Claims

1. A device for the gradual forming of an automobile sheet metal part, comprising a frame (1) and at least one rolling mechanism arranged on the frame (1), the rolling mechanism comprising oppositely arranged pressure rollers (2) which form a rolling gap between them, characterized in that, The rolling mechanism further comprises a driving mechanism for driving the compression rollers (2) to move towards or away from each other; the forming device further comprises: at least one infusion pipe (3) arranged on one side of the compression roller (2); at least one piston (4) arranged in the infusion pipe (3), the piston (4) being in sliding connection with the inner wall of the infusion pipe (3) and separating the infusion pipe (3) into a first space and at least one second space; a driving part for driving the piston (4) to slide in the infusion pipe (3) so as to change the volume of the first space and the second space; a plurality of spray heads (5) arranged on the infusion pipe (3), the spray heads (5) being in communication with the first space; an infusion pump in communication with the first space, the infusion pump being used to provide the first space with emulsion with constant hydraulic pressure.

2. The device according to claim 1, wherein The forming device further comprises: a motor (6) with an output shaft fixedly connected with one end of the compression roller (2), both ends of the compression roller (2) being provided with bearing seats (7), the motor (6) being fixed on one of the bearing seats (7); one of the bearing seats (7) of the compression roller (2) being fixed on the inner wall of the rack (1), and the compression roller (2) being a force roller; the other bearing seat (7) of the compression roller (2) being in sliding connection with a sliding groove (102) arranged on the inner wall of the rack (1), and the compression roller (2) being a compression roller; the driving mechanism comprising a hydraulic cylinder (101) with an output shaft fixedly connected with the bearing seat (7) of the compression roller, the hydraulic cylinder (101) being fixed on the rack (1).

3. The device according to claim 2, wherein The piston (4) in the infusion pipe (3) is provided with two, and is arranged close to both ends of the infusion pipe (3), the space between the two pistons (4) being the first space, the space between the piston (4) and the end of the corresponding infusion pipe (3) being the second space, the forming device further comprising: a plug rod (8) fixedly connected with the end of the piston (4), the plug rod (8) penetrating the end of the infusion pipe (3); a connecting piece (801) corresponding to the plug rod (8), the connecting piece (801) being fixedly connected with the rack (1) and the infusion pipe (3), one side of the connecting piece (801) being provided with a sleeve ring (802), the sleeve ring (802) being provided with a positioning groove (803) penetrating the inner and outer surfaces thereof; a rotating sleeve (9) in rotational connection with the sleeve ring (802), the outer surface of the rotating sleeve (9) being in rotational connection with the inner surface of the sleeve ring (802), and the rotating sleeve (9) being provided with a helical inclined groove (901) penetrating the inner and outer surfaces thereof, the side surface of the plug rod (8) being in sliding connection with the inner surface of the rotating sleeve (9); a guide column (10) arranged on the side surface of the plug rod (8), the guide column (10) penetrating the helical inclined groove (901) and the positioning groove (803) and being in sliding connection with the helical inclined groove (901) and the positioning groove (803) respectively; a gear (11) arranged on the rotating sleeve (9) and a rack (12) in meshing connection with the gear (11), the rack (12) being fixedly connected with the bearing seat (7) of the compression roller.

4. The gradual forming device for an automobile sheet metal part according to claim 3, characterized in that, The bottom of the rack (12) is in sliding connection with a guide bracket, and the guide bracket is fixedly connected with the bearing seat (7) of the force roller.

5. The device according to claim 2 or 3, wherein the device is a device for the gradual forming of an automobile panel. The infusion tube (3) is provided with two, and the infusion tube (3) is located on the upper and lower sides of the rolling gap, the spray head (5) is inclinedly arranged, and the inclined direction is towards the rolling gap.

6. The device according to claim 5, wherein the device is characterized by, The gradual change forming device further comprises an adjusting mechanism for adjusting the caliber of the spray head (5), and the adjusting mechanism comprises: An end of the movable rod (13) is fixedly connected to the guide column (10) and located at one end outside the connecting piece (801), equidistantly fixed with a connecting rod (14) corresponding to each spray head (5) along the length direction of the movable rod (13), and the connecting rod (14) is hingedly installed with a hinge rod (15) away from the movable rod (13); A fixed ring (16) is fixedly arranged on the inner wall of the spray port of the spray head (5), and a plurality of first guide grooves (1601) in curve shape are equidistantly arranged on the fixed ring (16) along the circumferential direction thereof; A plurality of sector blades (18) are arranged around the central axis of the spray port of the spray head (5), and the sector blades (18) are slidably installed in the corresponding first guide grooves (1601) through a pin (17), so that the inner side edges of the plurality of sector blades (18) collectively enclose a center spray hole with adjustable size; A control ring (19) is rotatably sleeved on the outer wall of the front end of the spray head (5), and the outer peripheral wall of the control ring (19) is hingedly installed with the hinge rod (15), a plurality of second guide grooves (1901) are arranged on the inner wall of the control ring (19) along the radial direction thereof, and the outer side of the sector blade (18) is fixedly provided with a sliding bar (1801) slidably matched with the second guide groove (1901).

7. The device according to claim 6, wherein the device is characterized by, The second guide groove (1901) is a straight groove, when the control ring (19) rotates relative to the fixed ring (16), the sliding bar (1801) and the second guide groove (1901) are slidably matched, and the pin (17) and the first guide groove (1601) are slidably matched, driving all the sector blades (18) to move radially synchronously, so as to change the size of the center spray hole.

8. The device according to claim 7, wherein the device is characterized by, The spray port adjusting mechanism further comprises a detachable connecting assembly arranged between the control ring (19) and the hinge rod (15), and the detachable connecting assembly comprises: A guide block (20) is hingedly connected to one end of the hinge rod (15), and a movable groove (2001) is arranged in the interior of the guide block (20), and a limiting pin (21) is slidably installed in the movable groove (2001); A spring (22) is fixedly arranged in the movable groove (2001), and one end of the spring (22) is fixedly installed at one end of the limiting pin (21); A connecting block (23) is fixedly arranged on the outer peripheral wall of the control ring (19), and a recess (2301) is arranged on the top wall of the connecting block (23), and the other end of the limiting pin (21) extends into the recess (2301).

9. The device according to claim 8, wherein the device is a device for gradual forming of an automobile panel. The end of the extending end of the limiting pin (21) is in arc shape matched with the shape of the recess (2301).

10. The device according to claim 8, wherein the device is characterized by, An annular guide groove (1902) is arranged on the outer peripheral wall of the control ring (19), and a sliding key is fixedly arranged on the guide block (20) and slidably matched with the annular guide groove (1902).

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