Automobile metal plate cold rolling forming equipment

Abstract

The invention provides automobile metal plate cold rolling forming equipment, and relates to the technical field of automobile metal plate cold rolling. The automobile metal plate cold rolling forming equipment comprises a rack, a hydraulic system and a control system are arranged on the rack, the automobile metal plate cold rolling forming equipment further comprises a hydraulic cylinder installed in the rack, a locking mechanism is fixedly connected into the hydraulic cylinder, and the locking mechanism comprises a flow guide block, a base, a pressure adjusting block and a plurality of flow guide assemblies; the pressure difference change of the top side and the bottom side of the pressure adjusting block is utilized to enable the pressure adjusting block to generate axial displacement, then hydraulic oil is enabled to be connected, disconnected and changed in a flow channel in the locking mechanism, and meanwhile, the elastic displacement end and the radial flow channel are matched with each other to enable an electronic protection device to lose protection performance and hydraulic equipment cannot normally provide pressure. A sealing cavity is formed between the movable end of the hydraulic cylinder and the locking mechanism, so that stopping of the telescopic end of the hydraulic cylinder is achieved, and the situation that the telescopic end of the hydraulic cylinder freely descends is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of automobile sheet metal cold rolling, and in particular to an automobile sheet metal cold rolling forming equipment. Background Art

[0002] In the prior art, in the cold rolling of automobile sheet metal, the metal blank is usually placed in a cold extrusion die cavity, and pressure is applied to the metal blank through a punch fixed on a hydraulic device at room temperature to cause the metal blank to undergo plastic deformation to obtain the desired parts.

[0003] The hydraulic equipment used requires a large pressure, but in the prior art, hydraulic equipment is mostly protected by electronic devices. First, the performance of the electronic devices is unstable and can be easily damaged by electromagnetic interference, power outages, and other conditions that affect their normal operation. Second, once the hydraulic equipment cannot provide pressure normally and the electronic protection device loses its protective performance, it is difficult for the telescopic end (active end) of the hydraulic equipment to stop effectively and in time, and it is easy to lose pressure and fall freely, causing sudden accidents. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an automobile sheet metal cold rolling forming equipment, including a frame, a hydraulic system and a control system are provided on the frame, and also includes: A hydraulic cylinder installed in the frame cooperates with a mold provided in the frame to apply shaping pressure to the metal blank; A locking mechanism is fixedly connected in the hydraulic cylinder, and the locking mechanism includes a guide block, a base, a pressure regulating block and a plurality of guide components; the guide block and the hydraulic cylinder are coaxially arranged, and an L-shaped flow channel is evenly arranged circumferentially thereon for guiding the flow direction of the hydraulic oil in the hydraulic cylinder; the base is coaxially sealed and fixedly connected to the bottom end of the guide block, and a protruding end plugged into the guide block is arranged on the upper end surface of the base, and radial flow channels corresponding to the L-shaped flow channels are evenly arranged in the circumference of the protruding end, and the axis of the base is through-arranged for the hydraulic oil to flow between the guide block and the base; the pressure regulating block seals and slides between the guide block and the base, and a pressure regulating block is arranged between the pressure regulating block and the guide block A cavity is filled with compressible gas, and radial through holes that are compatible with the radial flow channel are evenly arranged on the side wall of the pressure regulating block in the circumferential direction. The change in the volume of the cavity causes the radial through holes and the radial flow channel to be misaligned, thereby changing the flow direction and path of the hydraulic oil; a plurality of the guide components are evenly arranged in the circumferential direction, and the guide components include a fixed end and an elastic displacement end, wherein the fixed end is fixedly connected to the axial portion of the L-shaped flow channel, and the elastic displacement end and the radial flow channel are sealed and slidably plug-in matched, and the positive and negative hydraulic pressures transmitted from the direction of the hydraulic system cause the elastic displacement end to undergo radial displacement changes, and the on-off changes between the radial flow channel and the radial through holes are coordinated to control the circulation of the hydraulic oil.

[0005] Preferably, the hydraulic oil in the hydraulic cylinder is provided by the hydraulic system, and the inlet and outlet ends of the hydraulic cylinder use the same port, which is connected to the hydraulic system.

[0006] Preferably, the guide block is arranged between the liquid inlet and outlet ports and the telescopic end of the hydraulic cylinder.

[0007] Preferably, the guide block is circular in shape, with an inner recess at its bottom end, and the L-shaped flow channel thereon is divided into two parts, axial and radial, wherein only the upper end of the axial part is connected to the top side of the guide block, and the radial part is connected to the inner recess.

[0008] Preferably, the raised end of the upper end surface of the base is an axial guide wall, the axial guide wall is arranged in a ring shape, and the axial guide wall is arranged on the outer side of the point where the axis of the base passes through.

[0009] Preferably, the radial flow channel is a radial return channel, and the radial return channel is evenly arranged on the axial guide wall in the circumferential direction and radially penetrates the axial guide wall.

[0010] Preferably, the pressure regulating block comprises a circular top plate and an annular cylinder fixed to the bottom side of the circular top plate, wherein the circular top plate and the inner recess of the guide block are sealingly slidably connected, and the annular cylinder is sealingly slidably inserted into the axial guide wall.

[0011] Preferably, the radial through hole is a radial guide channel, and the radial guide channel runs through the annular tube; when the annular tube seal slides on the axial guide wall, the radial guide channel and the radial return channel overlap and are axially misaligned, and the radial guide channel is located on the top side of the axial guide wall.

[0012] Preferably, the fixed end of the guide assembly is a radial guide rod, which is arranged along the radial direction of the guide block and fixedly connected to the axial part of the L-shaped flow channel. The elastic displacement end of the guide assembly includes a radial sealing block and a spring. The radial sealing block sealingly slides on the radial guide rod and is sealingly plugged into the radial return channel. The spring limiting sleeve is arranged on the radial guide rod and abuts against the radial sealing block.

[0013] Preferably, the hydraulic oil forms two circulation channels in the locking mechanism; channel one flows from the L-shaped flow channel to the circular top plate, and flows from the radial guide channel located on the upper side of the axial guide wall to the axial penetration point of the base; channel two flows from the axial penetration point of the base to the radial guide channel, and after passing through the radial return channel overlapping with the radial guide channel, flows to the L-shaped flow channel, and finally flows back to the top side of the locking mechanism.

[0014] The beneficial effects of the present invention are: 1. The pressure difference between the top and bottom sides of the pressure regulating block is used to cause the pressure regulating block to undergo axial displacement, thereby causing the flow channel of the hydraulic oil in the locking mechanism to be switched on and off and changed. At the same time, the sealing sliding plug-in relationship between the elastic displacement end and the radial flow channel is used to form a sealed cavity between the movable end of the hydraulic cylinder and the locking mechanism when the electronic protection device loses its protection performance and the hydraulic equipment cannot provide pressure normally, thereby achieving the stopping of the telescopic end of the hydraulic cylinder and preventing it from falling freely. 2. The compressible gas in the cavity on the top side of the pressure regulating block is used to make the pressure regulating block have elastic reset performance, and the axial displacement change of the pressure regulating block is used to realize the change of the hydraulic oil channel, so that the locking mechanism has the normal hydraulic oil reciprocating circulation effect and the sealing function; 3. The elastic displacement of the elastic displacement end in radial direction is utilized to enable it to have self-reset performance, so as to realize the on-off and direction change of the oil channel.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of an automobile sheet metal cold rolling forming equipment according to an embodiment of the present application; Figure 2 It is a schematic diagram of the internal structure of an automobile sheet metal cold rolling forming equipment according to an embodiment of the present application; Figure 3 is a schematic diagram of a hydraulic cylinder and its internal structure according to an embodiment of the present application; Figure 4 is a schematic diagram of the internal structure of a locking mechanism according to an embodiment of the present application; Figure 5 is a structural exploded diagram of a locking mechanism and a reinforcement assembly according to an embodiment of the present application; Figure 6 is an exploded view of a partial structure of a locking mechanism and a reinforcement component according to an embodiment of the present application; Figure 7 According to the embodiment of the present application Figure 6 A is an enlarged schematic diagram; Figure 8 According to the embodiment of the present application Figure 6 A magnified schematic diagram of B; Fig. 9 is a schematic structural diagram of a voltage regulating block according to an embodiment of the present application; Fig.10 According to the embodiment of the present application Figure 6 A magnified schematic diagram of middle C; Fig.11 According to the embodiment of the present application Figure 6 A magnified schematic diagram of D in the middle; Fig.12 The structural explosion of the strengthening component and the loss-reducing ball according to the embodiment of the present application Figure 1 ; Fig.13 The structural explosion of the strengthening component and the loss-reducing ball according to the embodiment of the present application Figure 2 .

[0018] Icons: 1. Frame; 11. Bottom support; 12. Guide column; 13. Top support; 14. Pressure end; 15. Auxiliary hydraulic parts; 2. Hydraulic system; 3. Cooling system; 4. Control system; 5. Mold; 51. Bottom mold; 52. Top mold; 6. Hydraulic cylinder; 61. Cylinder body; 62. Sliding column; 63. Piston; 64. Liquid supply end; 7. Locking mechanism; 71. Guide block; 711. Guide channel; 712. Air cavity; 72. Base; 721. Boss; 72 2. Axial guide wall; 723. Radial baffle; 724. Radial return channel; 725. Radial slideway; 73. Pressure regulating block; 731. Sealing plate; 732. Axial sliding wall; 733. Radial guide channel; 74. Guide assembly; 741. Radial guide rod; 742. Radial blocking block; 743. Spring; 744. Limiting ring; 8. Strengthening assembly; 81. Wedge block; 811. Loss reduction groove; 82. Wedge strip; 821. Ball hole; 9. Loss reduction ball. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0020] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] Embodiment 1, as Figure 1-Figure 13 As shown, an automobile sheet metal cold rolling forming equipment according to an embodiment of the present application includes a frame 1, on which a hydraulic system 2 and a control system 4 are provided.

[0022] It should be noted that if Figure 1 and Figure 2 As shown, in a specific embodiment of the present application, the frame 1 is also equipped with a cooling system 3 for cooling the hydraulic oil in the hydraulic system 2 .

[0023] Among them, a bottom support part 11 is provided at the bottom of the frame 1, and a plurality of guide columns 12 are fixedly inserted on it. A top support part 13 is fixedly sleeved on the top of the guide column 12. A pressure end 14 is slidably provided on the part of the guide column 12 located between the bottom support part 11 and the top support part 13. At least two auxiliary hydraulic components 15 are fixedly inserted on the top support part 13. It should be noted that the auxiliary hydraulic component 15 can be a hydraulic cylinder, and its hydraulic oil is provided by the hydraulic system 2.

[0024] Specifically, an automobile sheet metal cold rolling forming equipment according to an embodiment of the present application further includes a hydraulic cylinder 6 installed in a frame 1 , which cooperates with a mold 5 provided in the frame 1 to apply shaping pressure to the metal blank.

[0025] It should be noted that if Figure 2 As shown, the mold 5 includes a bottom mold 51 fixedly connected to the upper end surface of the bottom support portion 11, and a top mold 52 fixedly connected to the bottom end surface of the pressure end 14, both of which can be disassembled and replaced according to the actual product shape, wherein the telescopic end of the hydraulic cylinder 6 and the upper end surface of the pressure end 14 are fixedly connected.

[0026] Further, such as Figure 3-Figure 6 As shown, a locking mechanism 7 is fixedly connected in the hydraulic cylinder 6 , and the locking mechanism 7 includes a guide block 71 , a base 72 , a pressure regulating block 73 and a plurality of guide components 74 .

[0027] The guide block 71 is coaxially arranged with the hydraulic cylinder 6 , and L-shaped flow channels are evenly arranged circumferentially thereon for guiding the flow direction of the hydraulic oil in the hydraulic cylinder 6 .

[0028] The base 72 is coaxially sealed and fixed to the bottom end of the guide block 71, and the upper end surface of the base 72 is provided with a protruding end plugged into the guide block 71, radial flow channels corresponding to the L-shaped flow channels are evenly arranged in the circumference of the protruding end, and the axial center of the base 72 is through-set to allow hydraulic oil to flow between the guide block 71 and the base 72.

[0029] The pressure regulating block 73 is sealed and slides between the guide block 71 and the base 72. A cavity is arranged between the pressure regulating block 73 and the guide block 71. The cavity is filled with compressible gas. Radial through holes that match the radial flow channel are evenly arranged on the side wall of the pressure regulating block 73. The change of the cavity volume causes the radial through holes and the radial flow channel to be misaligned, thereby changing the flow direction and path of the hydraulic oil.

[0030] It should be noted that the provision of the compressible gas enables the pressure regulating block 73 to have elastic reset performance.

[0031] Multiple guide components 74 are evenly arranged around the circumference, and the guide components 74 include a fixed end and an elastic displacement end, wherein the fixed end is fixedly connected to the axial portion of the L-shaped flow channel, and the elastic displacement end and the radial flow channel are sealed and slidably plugged in cooperation, and the positive and negative hydraulic pressures transmitted from the hydraulic system in two directions cause the elastic displacement end to undergo radial displacement changes, and the on-off changes between the radial flow channel and the radial through hole are cooperated to control the circulation of the hydraulic oil.

[0032] In addition, an automobile sheet metal cold rolling forming equipment according to an embodiment of the present application also has the following additional technical features: like Figure 3As shown, the hydraulic oil in the hydraulic cylinder 6 is provided by the hydraulic system 2 , and the inlet and outlet ends of the hydraulic cylinder 6 use the same port, which is connected to the hydraulic system 2 .

[0033] Specifically, in the specific embodiment of the present application, the hydraulic cylinder 6 includes a cylinder body 61, a sliding column 62, a piston 63 and a fluid supply end 64. Figure 2 and 3 As shown, the cylinder body 61 is fixedly inserted on the top support part 13, the sliding column 62 is sealingly slidably inserted at the bottom end of the cylinder body 61, one end of the sliding column 62 inserted in the cylinder body 61 is fixedly connected to the piston 63, the piston 63 is sealingly sliding inside the cylinder body 61, and the liquid supply end 64 is fixedly connected to the top of the cylinder body 61 and connected to the hydraulic system 2.

[0034] like Figure 3 and Figure 4 As shown, the guide block 71 is arranged between the inlet and outlet ports and the telescopic end of the hydraulic cylinder 6 to facilitate the control of the hydraulic oil located on the top side of the piston 63 in the cylinder body 61.

[0035] like Figure 3-Figure 7 As shown, the guide block 71 is arranged in a circular shape, and an inner recess is arranged at its bottom end. The L-shaped flow channel thereon is divided into two parts, axial and radial. Only the upper end of the axial part is connected to the top side of the guide block 71, and the radial part is connected to the inner recess.

[0036] Specifically, in the embodiment of the present application, the L-shaped flow channel on the guide block 71 is a guide channel 711 , and the inner recess is an air cavity 712 .

[0037] like Figure 4-Figure 8 As shown, the raised end of the upper end surface of the base 72 is an axial guide wall 722 . The axial guide wall 722 is arranged in a ring shape. The axial guide wall 722 is arranged on the outer side of the position where the axis of the base 72 passes through.

[0038] It should be noted that, in the specific embodiment of the present application, a boss 721 is coaxially arranged on the upper end surface of the base 72, so that the bottom end surface of the L-shaped guide channel 711 and the upper end surface of the boss 721 are in the same plane, thereby reducing the flow resistance of the hydraulic oil. The annular axial guide wall 722 is fixed to the boss 721, and a plurality of radial baffles 723 are evenly fixed to the outer circumference of the annular axial guide wall 722, and the plurality of radial baffles 723 are sealed and fitted with the inner wall of the air cavity 712.

[0039] Furthermore, the radial flow channel is a radial return channel 724 , which is evenly arranged on the axial guide wall 722 in the circumferential direction and radially penetrates the axial guide wall 722 .

[0040] It should be noted that the above-mentioned multiple radial baffles 723 are alternately arranged with the multiple radial return channels 724, so that an independent space is formed between the L-shaped guide channel 711 and the radial return channel 724 (when the pressure regulating block 73 abuts against the top of the axial guide wall 722).

[0041] like Figure 4-Figure 9 As shown, the pressure regulating block 73 includes a circular top plate and an annular cylinder fixed to the bottom side of the circular top plate, wherein the circular top plate and the inner recess of the guide block 71 are sealingly slidably connected, and the annular cylinder is sealingly slidably inserted into the axial guide wall 722.

[0042] Furthermore, the radial through hole is a radial guide channel 733, which passes through the annular tube. When the annular tube seal slides on the axial guide wall 722, the radial guide channel 733 and the radial return channel 724 will overlap and be axially misaligned, and the radial guide channel 733 is located on the top side of the axial guide wall 722 (at this time, the annular tube slides upward from the axial guide wall 722, otherwise the above-mentioned reverse position change will occur).

[0043] It should be noted that, in the specific embodiment of the present application, the circular top plate is the sealing plate 731 , and the annular cylinder is the axial sliding wall 732 .

[0044] like Figure 4-Figure 10 As shown, the fixed end of the guide component 74 is a radial guide rod 741, which is arranged along the radial direction of the guide block 71 and fixedly connected to the axial part of the L-shaped flow channel (specifically, the axial part of the guide channel 711). The elastic displacement end of the guide component 74 includes a radial blocking block 742 and a spring 743. The radial blocking block 742 is sealingly slid on the radial guide rod 741 and is sealingly plugged into the radial return channel 724. The spring 743 is limitedly sleeved on the radial guide rod 741 and abuts against the radial blocking block 742.

[0045] It should be noted that a limit ring 744 is fixedly sleeved on the radial guide rod 741, and a spring 743 is sleeved between the limit ring 744 and the radial blocking block 742, so that the radial displacement stroke of the radial blocking block 742 is limited and the radial blocking block 742 has self-reset and elastic displacement changes.

[0046] It can be understood that the hydraulic oil forms two circulation channels in the locking mechanism 7: Channel 1, flowing from the L-shaped flow channel (guide channel 711) to the circular top plate (sealing plate 731), and flowing from the radial guide channel 733 located on the upper side of the axial guide wall 722 to the axial penetration point of the base 72; Channel 2, flowing from the axial penetration point of the base 72 to the radial guide channel 733, and passing through the radial return channel 724 overlapping with the radial guide channel 733, and finally flowing to the L-shaped flow channel (guide channel 711), and then flowing back to the top side of the locking mechanism 7.

[0047] It should be noted that, in the specific embodiment of the present application, the axial guide wall 722 is located in the solid part above the radial return channel 724, and its height is greater than the height of the radial guide channel 733. When the radial guide channel 733 is located within the range of the axial guide wall 722 above the radial return channel 724, the pressure on both sides of the sealing plate 731 is balanced (when the sliding column 62 carries the top mold 52).

[0048] It should be further explained that, in another embodiment of the present application, a pipeline can be added to the top of the air cavity 712, and a sealed device for adjusting the air pressure to the outside world that passes through the top of the cylinder body 61 (not shown in the figure, the adjustment of the gas pressure is a very mature prior art, which is imaginable to the relevant technical personnel in this field, so it will not be elaborated here), so that the gas pressure value in the air cavity 712 changes with the change of the weight of the top mold 52 carried by the sliding column 62, and always remains in a load-bearing state. When the radial guide channel 733 is located within the range of the axial guide wall 722 above the radial return channel 724, the pressure on both sides of the sealing plate 731 is balanced.

[0049] The following describes the use process of an automobile sheet metal cold rolling forming device according to an embodiment of the present application with reference to the accompanying drawings: During specific use, the metal blank is placed on the bottom mold 51 through an external automatic handling device (which can be a robot or other related existing technologies), and hydraulic oil is transported to the cylinder body 61 through the hydraulic system 2. The hydraulic oil will flow into the air cavity 712 below the sealing plate 731 through the multiple guide channels 711 on the guide block 71. At this time, under the action of the hydraulic oil and the elastic force of the spring 743, the radial blocking block 742 will be inserted into the radial return channel 724 to form a blockage at the radial return channel 724. Under the pressure provided by the hydraulic system 2, the hydraulic oil will force the sealing plate 731 to undergo an upward axial displacement and squeeze the compressible gas in the air cavity 712 above it to seal. The rise of plate 731 will drive the axial sliding wall 732 to follow the synchronous displacement until the multiple radial guide channels 733 thereon are higher than the upper end surface of the axial guide wall 722. At this time, the hydraulic oil will pass through the radial guide channel 733 and flow to the through-hole at the axis of the base 72, and pressurize the piston 63, forcing the piston 63 to drive the sliding column 62 to make a downward axial displacement. Then, through the displacement of the sliding column 62, the pressure end 14 will be driven along the guide column 12 to drive the top die 52 thereon to press against the metal blank located on the bottom die 51, and force it to be formed. After cold rolling forming, the hydraulic system 2 is reversely controlled, and the hydraulic oil flows back from the cylinder 61 to the hydraulic system 2. In this process, the seal The hydraulic oil at the bottom side of plate 731, the inner side of air cavity 712, and the outer side of axial sliding wall 732 loses the upward pressure on sealing plate 731. Therefore, under the action of the pressure difference on both sides of sealing plate 731, sealing plate 731 will drive axial sliding wall 732 to make downward axial displacement until it is reset (radial guide channel 733 is located at axial guide wall 722 above radial return channel 724). Under the action of negative pressure continuously provided in the direction of hydraulic system 2, sealing plate 731 will be forced to continue to move downward until radial guide channel 733 and radial return channel 724 coincide with each other (i.e., communicate with each other). Under the influence of the return negative pressure generated in the direction of hydraulic system 2, the radial The blocking block 742 is radially displaced outward along the radial guide rod 741 and squeezes the spring 743 until the radial blocking block 742 is separated from the radial guide channel 733, so that the radial guide channel 733, the radial return channel 724 and the guide channel 711 are connected, so that the hydraulic oil between the base 72 and the piston 63 can flow back to the hydraulic system 2, and under the action of negative pressure, the piston 63 drives the sliding column 62 to move axially upward, so that the top die 52 and the cold-rolled metal blank are separated, and then the formed metal blank is moved away from the bottom die 51 by an external automatic handling device, completing a cold-rolling forming action; During the cold rolling forming operation, once the electronic protection device installed on the original hydraulic system 2 and the hydraulic cylinder 6 fails, or the hydraulic system 2 fails and cannot normally provide the required pressure of the hydraulic cylinder 6, the hydraulic oil in the direction of the guide channel 711 has no pressure or the pressure value cannot be maintained as required. At this time, under the pressure value of the compressible gas in the air cavity 712, the sealing plate 731 will be reset, so that the radial guide channel 733 is located in the range of the axial guide wall 722 above the radial return channel 724. At this time, the radial guide channel 733 and the radial return channel 724 are 4, and at the same time, under the elastic action of the spring 743, the radial blocking block 742 will be reset and the state of being sealed and plugged in the radial guide channel 733 will be restored. The direction of the guide channel 711 and the direction of the axial penetration part of the base 72 will form a blocking state, that is, a sealing state will be formed between the base 72 and the piston 63 at this time, so that the piston 63 and the sliding column 62 will be kept stopped, and will not fall due to the self-weight and the load in the direction of the sliding column 62 due to the loss of the required pressure value, which plays a certain protective role in the stability of the equipment.

[0050] Embodiment 2. In the related art, in this automobile sheet metal cold rolling forming equipment, the elastic reset of the radial blocking block 742 is provided by the spring 743, and the spring 743 will inevitably decay or even be damaged during long-term use. Once the radial blocking block 742 loses its original elastic reset function, its blocking effect in protecting the sliding column 62 from stopping will be greatly reduced or even fail, thereby reducing the stopping effect of the sliding column 62 and affecting the overall stability of the equipment.

[0051] According to some embodiments of the present application, Figure 4-Figure 6 , Figure 8 , Figure 11-13 As shown, the upper end surface of the base 72 is provided with a plurality of radially distributed grooves, which extend to both sides of the raised end provided thereon, and the plurality of grooves are evenly arranged circumferentially, and a reinforcing component 8 is arranged between the plurality of grooves and one end (axial sliding wall 732) of the pressure regulating block 73 inserted in the base 72, and the reinforcing component 8 is constructed into a radial displacement end and an axial displacement end, and the inward displacement of the radial displacement end drives the axial displacement end to cause an upward axial displacement, and the downward axial displacement of the axial displacement end drives the radial displacement end to cause an outward radial displacement.

[0052] It should be noted that in the specific embodiment of the present application, the groove is a radial slideway 725 .

[0053] The axial displacement end of the strengthening component 8 is a plurality of wedge blocks 81 , which are evenly fixed to one end (axial sliding wall 732 ) of the pressure regulating block 73 inserted in the base 72 , and the wedge blocks 81 are axially inserted in the groove.

[0054] The radial displacement end of the reinforcing component 8 is a plurality of wedge strips 82 , which are evenly arranged around the circumference. The wedge strips 82 are slidably arranged in the grooves and are fixedly connected to the elastic displacement end (radial blocking block 742 ) of the guide component 74 .

[0055] Furthermore, the wedge block 81 and the wedge strip 82 abut against each other, and one end of the abutting ends of the two are wedge-fitted.

[0056] Therefore, it can be understood that when the sealing plate 731 undergoes axial displacement downward (the hydraulic oil flows from the direction of the piston 63 to the direction of the guide channel 711), the multiple wedge blocks 81 fixed at the bottom end thereof will be driven to displace synchronously in the same direction through the axial sliding wall 732, i.e., plugged into the radial slideway 725. In this process, the radial blocking block 742 originally plugged into the radial guide channel 733 (it can be understood that the wedge strip 82 fixed below it is located at the inner end of the radial slideway 725 at this time), the wedge strip 82 thereon will be resisted by the wedge block 81 displaced downward, and the wedge strip 82 will be forced to displace radially outward under the action of the sliding fit of the wedge surface, i.e., displace outward along the radial slideway 725. In this way, the radial blocking block 742 will be displaced synchronously in the same direction and squeeze the spring 743. On the contrary, when the hydraulic oil flows from the guide channel 711 to the piston 63, the radial guide channel 733 is at least located at the axial guide wall 722 above the radial return channel 724 (to maintain the pressure balance on both sides of the two sealing plates 731). Even if the spring 743 loses its elastic function at this time, the radial guide channel 733 and the radial return channel 724 are not connected. Therefore, under the action of the pressure of the hydraulic oil, the sealing plate 731 will be forced to move axially upward until the radial guide channel 733 leaks out from the top side of the axial guide wall 722. During this process, the wedge block 81 will move axially upward synchronously with the axial sliding wall 732, leaving the inner side of the radial slide 725 empty.

[0057] During the process of the hydraulic oil being transported in the forward and reverse directions with normal pressure, the loss of elasticity of the spring 743 does not affect the circulation of the hydraulic oil.

[0058] When the sliding column 62 loses the normal pressure of the hydraulic oil and needs to stop, at this time, because the hydraulic oil in the hydraulic oil guide channel 711 does not have the pressure change applied by the hydraulic system 2, affected by the damage of the local spring 743, part of the radial blocking block 742 cannot be reset at this time, that is, it may cause the local radial guide channel 733 and the radial return channel 724 to be in a connected state (in the process of the hydraulic oil returning to the hydraulic system 2). At this time, under the action of the gas pressure in the air cavity 712, the sealing plate 731 will be forced to move upward and reset. At the same time, the hydraulic oil flowing into the direction of the piston 63 from the guide channel 711 will also push the radial blocking block 742 into the radial return channel 724 to form a blockage when passing through the radial guide channel 733 and the radial return channel 724 (in the process of resetting the sealing plate 731, the wedge block 81 will follow the axial sliding wall 732 to move axially upward synchronously, so that the inner side of the radial slideway 725 is vacant). In this way, the wedge strip 82 connected below the radial blocking block 742 has space for displacement; In addition, when the hydraulic oil is transported from the hydraulic system 2 to the cylinder body 61, the radial guide channel 733 is located on the upper side of the axial guide wall 722. During this process, the radial blocking block 742 and the radial return channel 724 will be forced to form a blockage shape under the action of the flow of hydraulic oil. Even if the hydraulic oil on the outside of the radial blocking block 742 loses pressure at this time, the hydraulic oil on the inside has a certain suction force, so the radial blocking block 742 will not be separated from the radial return channel 724.

[0059] It should be further explained that, when the radial guide channel 733 is located at the axial guide wall 722 above the radial return channel 724, the wedge block 81 at this time will not cause the wedge strip 82 to move, that is, the radial blocking block 742 will not be separated from the radial return channel 724, so that the radial blocking block 742 and the radial return channel 724 remain in a sealed state at this time.

[0060] Embodiment three, in the related art, this kind of automobile sheet metal cold rolling forming equipment, because the two surfaces abutting each other between the wedge block 81 and the wedge strip 82 are wedge-shaped sliding fit, it can realize radial displacement driving axial displacement, or axial displacement driving radial displacement. The wedge-shaped sliding fit makes there is a large friction between the wedge block 81 and the wedge strip 82. Under long-term use, it is inevitable that wear will occur between the two. Over time, it will affect the stroke of radial displacement or axial displacement, and affect the stability of the equipment in actual use.

[0061] According to some embodiments of the present application, Figure 11-13 As shown, a loss reducing ball 9 is provided between the wedge block 81 and the wedge strip 82 . The loss reducing ball 9 is rotatably embedded in the wedge strip 82 , and the loss reducing ball 9 and the wedge block 81 are in rolling contact.

[0062] A loss reducing groove 811 is provided on one side of the wedge-shaped fit between the wedge block 81 and the wedge strip 82, and the loss reducing groove 811 and the loss reducing ball 9 are in rolling fit.

[0063] Furthermore, a ball hole 821 is provided on one side of the wedge-shaped fit between the wedge strip 82 and the wedge block 81 , and the loss-reducing ball 9 is rotatably embedded in the ball hole 821 .

[0064] It should be noted that the rolling fit between the wear reducing ball 9 and the wear reducing groove 811 forms a clearance fit between the wedge block 81 and the wedge strip 82, thereby reducing the wear caused by direct contact between the two.

[0065] Therefore, during specific use, through the rolling fit between the reduction ball 9 and the reduction groove 811, a clearance fit is formed between the wedge block 81 and the wedge strip 82, thereby reducing the contact area between the two, and then reducing the friction between the two, which helps to cause radial displacement or axial displacement between the two, and reduces the wear between the two caused by the wedge sliding fit, thereby ensuring the accuracy of the radial displacement or axial displacement stroke to a certain extent, and ensuring the stability of the equipment operation.

[0066] It should be noted that the specific models and specifications of the auxiliary hydraulic parts 15, hydraulic system 2, cooling system 3, control system 4, bottom mold 51, top mold 52, piston 63, spring 743 and wear reduction ball 9 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail.

[0067] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An automobile sheet metal cold rolling forming equipment, comprising a frame (1), wherein the frame (1) is provided with a hydraulic system (2) and a control system (4), characterized in that: Also includes: A hydraulic cylinder (6) installed in the frame (1) cooperates with a mold (5) provided in the frame (1) to apply shaping pressure to the metal blank; A locking mechanism (7) is fixedly connected inside the hydraulic cylinder (6), and the locking mechanism (7) comprises a guide block (71), a base (72), a pressure regulating block (73), and a plurality of guide components (74); The guide block (71) and the hydraulic cylinder (6) are coaxially arranged, and L-shaped flow channels are evenly arranged circumferentially thereon, for guiding the flow direction of the hydraulic oil in the hydraulic cylinder (6); The base (72) is coaxially sealed and fixedly connected to the bottom end of the guide block (71), and the upper end surface of the base (72) is provided with a protruding end plugged into the guide block (71), radial flow channels corresponding to the L-shaped flow channels are evenly arranged in the circumferential direction of the protruding end, and the axis of the base (72) is penetrated so that hydraulic oil can flow between the guide block (71) and the base (72); The pressure regulating block (73) is sealingly slidable between the guide block (71) and the base (72); a cavity is provided between the pressure regulating block (73) and the guide block (71); the cavity is filled with compressible gas; radial through holes that are compatible with the radial flow channel are evenly provided on the side wall of the pressure regulating block (73) in a circumferential direction; a change in the volume of the cavity causes a misalignment between the radial through holes and the radial flow channel, thereby changing the flow direction and path of the hydraulic oil; A plurality of the guide components (74) are evenly arranged in the circumferential direction, and the guide components (74) include a fixed end and an elastic displacement end, wherein the fixed end is fixedly connected to the axial portion of the L-shaped flow channel, and the elastic displacement end and the radial flow channel are sealed and slidably plugged together, so that the elastic displacement end undergoes radial displacement changes in coordination with the positive and negative hydraulic pressures transmitted from the hydraulic system (2), and the circulation of hydraulic oil is controlled in coordination with the on-off changes between the radial flow channel and the radial through hole.

2. The automotive sheet metal cold rolling forming equipment according to claim 1, characterized in that: The hydraulic oil in the hydraulic cylinder (6) is provided by the hydraulic system (2), and the hydraulic inlet and outlet ends of the hydraulic cylinder (6) use the same port, which is in communication with the hydraulic system (2).

3. The automotive sheet metal cold rolling forming equipment according to claim 1, characterized in that: The guide block (71) is arranged between the liquid inlet and outlet ports and the telescopic end of the hydraulic cylinder (6).

4. The automotive sheet metal cold rolling forming equipment according to claim 1, characterized in that: The guide block (71) is arranged in a circular shape, and an inner concave portion is arranged at its bottom end, and the L-shaped flow channel thereon is divided into two parts, an axial part and a radial part, wherein only the upper end of the axial part is in communication with the top side of the guide block (71), and the radial part is in communication with the inner concave portion.

5. The automobile sheet metal cold rolling forming equipment according to claim 4, characterized in that: The raised end of the upper end surface of the base (72) is an axial guide wall (722), the axial guide wall (722) is arranged in a ring shape, and the axial guide wall (722) is arranged outside the point where the axis of the base (72) passes through.

6. The automobile sheet metal cold rolling forming equipment according to claim 5, characterized in that: The radial flow channel is a radial return channel (724), and the radial return channel (724) is evenly arranged on the axial guide wall (722) in the circumferential direction and radially penetrates the axial guide wall (722).

7. The automobile sheet metal cold rolling forming equipment according to claim 6, characterized in that: The pressure regulating block (73) comprises a circular top plate and an annular cylinder fixed to the bottom side of the circular top plate, wherein the circular top plate and the inner recess of the guide block (71) are sealingly slidably connected, and the annular cylinder is sealingly slidably plugged into the axial guide wall (722).

8. The automobile sheet metal cold rolling forming equipment according to claim 7, characterized in that: The radial through hole is a radial flow guide channel (733), and the radial flow guide channel (733) runs through the annular cylinder; When the annular sleeve seal slides on the axial guide wall (722), the radial guide channel (733) and the radial return channel (724) overlap and are axially misaligned, and the radial guide channel (733) is located on the top side of the axial guide wall (722).

9. The automobile sheet metal cold rolling forming equipment according to claim 8, characterized in that: The fixed end of the flow guide component (74) is a radial guide rod (741), and the radial guide rod (741) is arranged along the radial direction of the flow guide block (71) and is fixedly connected to the axial part of the L-shaped flow channel. The elastic displacement end of the flow guide component (74) comprises a radial blocking block (742) and a spring (743). The radial blocking block (742) is sealingly slidable on the radial guide rod (741) and is sealingly plugged into the radial return channel (724). The spring (743) is limitedly sleeved on the radial guide rod (741) and abuts against the radial blocking block (742).

10. The automobile sheet metal cold rolling forming equipment according to claim 9, characterized in that: The hydraulic oil forms two circulation channels in the locking mechanism (7); Channel 1, flowing from the L-shaped flow channel to the circular top plate, and flowing from the radial flow guide channel (733) located on the upper side of the axial guide wall (722) to the point where the axis of the base (72) passes through; Channel 2 flows from the axial penetration point of the base (72) to the radial guide channel (733), passes through the radial return channel (724) that overlaps with the radial guide channel (733), flows to the L-shaped flow channel, and finally flows back to the top side of the locking mechanism (7).

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