A welding fixture for slender frame parts

Abstract

The present application provides a welding fixture for slender frame parts, which relates to the technical field of vehicle body welding tooling, including a workbench, the top of which is provided with a table; a support assembly is fixedly mounted on the table and evenly arranged along a first direction; a clamping assembly is located between two adjacent support assemblies, and includes a base slidably connected to the table; a C-shaped clamping head is provided on the base; a clamping mechanism is provided inside the clamping head corresponding to the workpiece, and relatively retractable extensions are provided on both sides, and a clamping mechanism is provided corresponding to the workpiece; an end of the extension away from the clamping head extends to the top of the support assembly, and the workpiece can be clamped on the support assembly by the clamping mechanism. By arranging the support assemblies at intervals on the workbench, and then cooperating with the clamping mechanism on the clamping assembly, the workpiece can be clamped up and down; at the same time, the clamping assembly is also provided with a clamping mechanism arranged up and down, so that the workpiece can not only be stably fixed and clamped, but also effectively prevent the workpiece from being subjected to concentrated stress.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle body welding tooling, and in particular to a welding fixture for elongated vehicle frame parts. Background Art

[0002] The frame longitudinal beam is an important load-bearing part of the vehicle, bearing the impact load from the road. At present, the mainstream longitudinal beam structure of passenger cars is generally a box-shaped longitudinal beam structure with grooves welded inside and outside. This structure has a large number of parts, long welds, large welding deformation, and is difficult to correct and control. It affects the chassis installation accuracy and suspension hard points, and it is difficult to ensure product consistency and quality.

[0003] The longitudinal beam has a slender structure, including a U-shaped bottom groove and a matching top cover. During welding, the top cover needs to be positioned and installed on the bottom groove and pressed. Since the longitudinal beam has a long structure, it is easy to deform during welding, so the problem of how to clamp it needs to be solved urgently. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a welding fixture for a slender frame part.

[0005] The present application provides a welding fixture for a slender frame part, comprising

[0006] A workbench extending along a first direction and having a table top for mounting a workpiece;

[0007] A supporting assembly, wherein the supporting assembly includes a plurality of supporting assemblies, which are fixedly mounted on the table and evenly arranged along the first direction, and are used to support and position the workpiece;

[0008] A clamping assembly, the clamping assembly is located between two adjacent support assemblies, and includes a base slidably connected to the table top, and the sliding direction is perpendicular to the first direction;

[0009] The base is provided with a C-shaped clamping head for clamping with the workpiece;

[0010] A clamping mechanism is provided inside the clamping head corresponding to the workpiece; two sides of the clamping head are respectively provided with extension parts that can be extended and retracted along the first direction, and a clamping mechanism is provided corresponding to the workpiece;

[0011] One end of the extension portion away from the clamping head extends to above the support assembly, and the workpiece can be pressed onto the support assembly through the clamping mechanism.

[0012] Furthermore,

[0013] The extension portion includes two racks parallel to each other, and the extension direction is parallel to the first direction;

[0014] The clamping head is provided with a matching through hole corresponding to the rack, which is used for sliding connection with the rack.

[0015] Furthermore,

[0016] The clamping head is also provided with a driving wheel corresponding to the two racks;

[0017] The driving wheel is rotatably mounted on the clamping head and is located between the two racks, and is used to synchronously drive the two racks;

[0018] The two racks are meshingly connected with the driving wheel.

[0019] Furthermore,

[0020] The clamping mechanism includes a docking block fixedly mounted on the end of the rack;

[0021] A pressing cylinder is vertically mounted on the docking block;

[0022] The cylinder body of the pressing cylinder is fixedly installed above the docking block, and the piston rod extends to the bottom of the docking block.

[0023] Furthermore,

[0024] A pressing plate is also installed on the pressing cylinder;

[0025] The pressing plate is connected to the pressing cylinder via a threaded sleeve;

[0026] One end of the threaded sleeve is fixedly connected to the pressing plate, and the other end is threadedly connected to the piston rod;

[0027] The piston rod is provided with a matching external thread corresponding to the threaded sleeve, and a locking nut is also provided corresponding to the threaded sleeve.

[0028] Furthermore,

[0029] The clamping mechanism includes a pressure head located above the clamping head;

[0030] The pressure head is connected to the clamping head through a threaded rod;

[0031] The threaded rod is rotatably mounted on the clamping head, one end of which is threadedly connected to the pressure head, and the other end of which is coaxially and fixedly connected to the driving wheel.

[0032] Furthermore,

[0033] The clamping head is also provided with a guide rod corresponding to the pressure head;

[0034] The guide rod is parallel to the threaded rod, one end of which is fixedly mounted on the clamping head, and the other end of which is slidably connected to the pressure head;

[0035] The pressure head is provided with a matching docking hole corresponding to the guide rod.

[0036] Furthermore,

[0037] A contact plate is also provided on one side of the pressure head away from the guide rod;

[0038] A connecting pipe is provided on one side of the abutment plate close to the pressure head;

[0039] The connecting pipe is provided with an external thread for threaded connection with the pressure head;

[0040] The pressure head is provided with a matching threaded hole corresponding to the connecting pipe.

[0041] Furthermore,

[0042] The clamping mechanism also includes a lifting cylinder installed below the clamping head;

[0043] The cylinder body of the lifting cylinder is fixedly installed below the clamping head, the piston rod passes through the clamping head and a support plate is installed at the end;

[0044] The support plate is connected to the piston rod via a universal joint;

[0045] One end of the universal joint is fixedly connected to the support plate, and the other end is threadedly connected to the piston rod.

[0046] Furthermore,

[0047] The support assembly includes a support seat;

[0048] One end of the support base is fixedly mounted on the workbench, and the other end is mounted with a docking rod;

[0049] The extension direction of the docking rod is perpendicular to the first direction, one end of the docking rod is hinged with a first screw rod, and the other end is provided with a strip hole along the axial direction;

[0050] A pin is slidably installed in the strip-shaped hole for connecting the second screw rod;

[0051] The support seat is provided with a third screw rod with opposite rotation direction corresponding to the first screw rod and the second screw rod respectively;

[0052] The third screw rod is connected to the first screw rod and the second screw rod respectively via matching butt sleeves;

[0053] The two ends of the docking sleeve are respectively provided with internal threads with opposite rotation directions, which are used to adjust the height and angle of the docking rod.

[0054] The advantages and positive effects of this application are:

[0055] This technical solution can not only position and support the bottom groove, but also effectively avoid concentrated stress by arranging support components at intervals on the workbench; the clamping mechanism on the clamping component can then clamp the workpiece up and down; at the same time, the clamping component is also provided with a clamping mechanism arranged up and down, which can also clamp the workpiece up and down, so that the workpiece can not only be stably fixed and clamped, but also effectively avoid concentrated stress on the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A schematic diagram of the structure of a welding fixture for elongated frame parts provided in an embodiment of the present application;

[0057] Figure 2 A schematic diagram of the structure of a clamping assembly of a welding fixture for elongated vehicle frame parts provided in an embodiment of the present application;

[0058] Figure 3 A schematic diagram of the structure of a clamping mechanism of a welding fixture for a slender frame part provided in an embodiment of the present application;

[0059] Figure 4 A schematic structural diagram of a support assembly of a welding fixture for elongated vehicle frame parts provided in an embodiment of the present application.

[0060] The text markings in the figure are as follows: 100-workbench; 200-base; 210-clamping head; 220-rack; 221-clamping cylinder; 222-pressure plate; 223-threaded sleeve; 230-driving wheel; 240-pressure head; 241-guide rod; 242-abutment plate; 250-lifting cylinder; 251-support plate; 300-support seat; 310-docking rod; 320-first screw rod; 330-second screw rod; 340-third screw rod; 350-docking sleeve. DETAILED DESCRIPTION

[0061] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is described in detail below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present application.

[0062] Please refer to Figure 1-4The present embodiment provides a welding fixture for slender frame parts, including a workbench 100, which extends along a first direction and has a table top on the top for mounting a workpiece; a supporting assembly, including a plurality of supporting assemblies, which are fixedly mounted on the table top and evenly arranged along the first direction for supporting and positioning the workpiece; a clamping assembly, which is located between two adjacent supporting assemblies and includes a base 200 slidably connected to the table top, and the sliding direction is perpendicular to the first direction; a C-shaped clamping head 210 is provided on the base 200 for clamping with the workpiece; a clamping mechanism is provided inside the clamping head 210 corresponding to the workpiece; extension portions that can be telescopic along the first direction are respectively provided on both sides of the clamping head 210, and a clamping machine is provided corresponding to the workpiece; an end of the extension portion away from the clamping head 210 extends to the top of the supporting assembly, and the workpiece can be clamped on the supporting assembly by the clamping mechanism.

[0063] In this embodiment, the workbench 100 extends along the first direction and has a relatively long length and a relatively short width, so that it can support the long strip beam and facilitate welding of both sides of the beam.

[0064] In this embodiment, the support assembly is fixedly installed on the table top of the workbench 100, and the number includes multiple support assemblies that are evenly arranged along the first direction, so as to provide multi-point support for the bottom groove of the beam, thereby effectively preventing the bottom groove from being deformed.

[0065] In this embodiment, the clamping assembly is installed between two adjacent supporting assemblies; the base 200 is slidably connected to the workbench 100 through a slide rail, and the sliding direction is perpendicular to the first direction; when the workpiece needs to be loaded and unloaded, the base 200 needs to first slide to the side away from the workpiece, so as to complete the clamping assembly's avoidance of the workpiece.

[0066] In this embodiment, the clamping head 210 is C-shaped, fixedly mounted on the base 200, and has an opening facing the side close to the workpiece; when the base 200 slides toward the side close to the workpiece, the clamping head 210 will be clamped with the workpiece.

[0067] In this embodiment, both sides of the clamping head 210 are respectively provided with extension parts extending to the top of the support assembly; the ends of the extension parts are provided with clamping mechanisms corresponding to the support assembly for clamping the top cover onto the bottom groove.

[0068] In a preferred embodiment, the extension portion includes two racks 220 parallel to each other, and the extension direction is parallel to the first direction; a matching through hole is provided on the clamping head 210 corresponding to the rack 220 for sliding connection with the rack 220 .

[0069] In this embodiment, the clamping head 210 is provided with two through holes parallel to each other, and the extension direction of the through holes is parallel to the first direction; the rack 220 is slidably installed in the through holes, and the sliding direction is parallel to the first direction; when the two ends of the two racks 220 are in an aligned state, they are in a retracted state; when one end of the rack 220 is at the end position of the through hole, it is in an extended state.

[0070] In this embodiment, a supporting mechanism is provided on the clamping head 210 corresponding to the rack 220; the supporting mechanism includes a sliding sleeve mounted on the rack 220; the sliding sleeve is fixedly connected to the clamping head 210 through a connecting rod, and the length of the connecting rod is relatively less than half the length of the rack 220, thereby ensuring that the rack 220 will not detach from the sliding sleeve when in a retracted state.

[0071] In a preferred embodiment, a driving wheel 230 is further provided on the clamping head 210 corresponding to the two racks 220; the driving wheel 230 is rotatably mounted on the clamping head 210 and is located between the two racks 220 for synchronously driving the two racks 220; the two racks 220 are meshingly connected with the driving wheel 230.

[0072] In this embodiment, the driving wheel 230 is rotatably mounted on the clamping head 210, located between the two racks 220, and meshingly connected with the two racks 220; thus, by controlling the rotation of the driving wheel 230, the two racks 220 can be effectively driven to slide synchronously.

[0073] In a preferred embodiment, the clamping mechanism includes a docking block fixedly mounted on the end of the rack 220; a clamping cylinder 221 is vertically mounted on the docking block; the cylinder body of the clamping cylinder 221 is fixedly mounted above the docking block, and the piston rod extends to the bottom of the docking block.

[0074] In this embodiment, a docking block is respectively provided at one end of the two racks 220 that are away from each other; at the same time, a clamping cylinder 221 is installed on the docking block; the cylinder body of the clamping cylinder 221 is fixedly installed above the docking block, and the piston rod passes through the docking block and extends to the bottom of the docking block, so as to press the top cover onto the bottom groove.

[0075] In a preferred embodiment, a pressure plate 222 is also installed on the clamping cylinder 221; the pressure plate 222 is connected to the clamping cylinder 221 through a threaded sleeve 223; one end of the threaded sleeve 223 is fixedly connected to the pressure plate 222, and the other end is threadedly connected to the piston rod; a matching external thread is provided on the piston rod corresponding to the threaded sleeve 223, and a locking nut is also provided on the corresponding threaded sleeve 223.

[0076] In this embodiment, an external thread is also provided on the end of the piston rod away from the cylinder body; the pressure plate 222 is connected to the piston rod through a threaded sleeve 223; one end of the threaded sleeve 223 is fixedly mounted on the pressure plate 222, and the other end is threadedly connected to the piston rod; when the piston rod is in a fully extended state, the downward pressure height of the pressure plate 222 can be effectively adjusted by rotating the threaded sleeve 223.

[0077] In this embodiment, a locking nut is also threadedly installed on the piston rod; when the downward pressing height of the pressure plate 222 is adjusted by the threaded sleeve 223, the threaded sleeve 223 can be effectively locked on the piston rod by rotating the locking nut, thereby preventing the threaded sleeve 223 from rotating accidentally.

[0078] In a preferred embodiment, the clamping mechanism includes a pressure head 240 located above the clamping head 210; the pressure head 240 is connected to the clamping head 210 through a threaded rod; the threaded rod can be rotatably mounted on the clamping head 210, one end of which is threadedly connected to the pressure head 240, and the other end is coaxially and fixedly connected to the driving wheel 230.

[0079] In this embodiment, the pressure head 240 is installed above the opening of the clamping head 210 and is connected to the clamping head 210 through a threaded rod; the threaded rod can be rotatably installed on the clamping head 210, one end of which is threadedly connected to the pressure head 240, and the other end passes through the clamping head 210 and is coaxial and fixedly connected to the driving wheel 230.

[0080] In this embodiment, the threaded rod is driven by a stepper motor; the output end of the stepper motor is connected to the threaded rod through a synchronous belt; a matching synchronous wheel is provided at the end of the threaded rod located at the driving wheel 230 away from the pressure head 240 corresponding to the synchronous belt.

[0081] In a preferred embodiment, a guide rod 241 is further provided on the clamping head 210 corresponding to the pressing head 240; the guide rod 241 is parallel to the threaded rod, one end of which is fixedly mounted on the clamping head 210 and the other end is slidably connected to the pressing head 240; a matching docking hole is provided on the pressing head 240 corresponding to the guide rod 241.

[0082] In this embodiment, the pressing head 240 is restricted in rotation by a guide rod 241; the guide rod 241 is parallel to the threaded rod, one end of which is fixedly mounted on the clamping head 210 and the other end is slidably connected to the pressing head 240; a docking hole with a matching diameter is provided on the pressing head 240 corresponding to the guide rod 241.

[0083] In a preferred embodiment, an abutment plate 242 is further provided on the side of the pressing head 240 away from the guide rod 241; a connecting tube is provided on the side of the abutment plate 242 close to the pressing head 240; the connecting tube is provided with an external thread for threaded connection with the pressing head 240; and a matching threaded hole is provided on the pressing head 240 corresponding to the connecting tube.

[0084] In this embodiment, the abutment plate 242 is circular and is integrally formed with the connecting pipe; at the same time, the connecting pipe is also provided with an internal thread matching the threaded hole, which can be connected to the pressure head 240 by rotating it and the height can be adjusted.

[0085] In this embodiment, a first locking nut is further sleeved on the connecting pipe. When the height adjustment of the abutting plate 242 is completed, the first locking nut can be rotated to lock it, thereby preventing the height of the abutting plate 242 from changing.

[0086] In a preferred embodiment, the clamping mechanism also includes a lifting cylinder 250 installed below the clamping head 210; the cylinder body of the lifting cylinder 250 is fixedly installed below the clamping head 210, the piston rod passes through the clamping head 210 and a support plate 251 is installed at the end; the support plate 251 is connected to the piston rod through a universal joint; one end of the universal joint is fixedly connected to the support plate 251, and the other end is threadedly connected to the piston rod.

[0087] In this embodiment, the lifting cylinder 250 is installed below the opening of the clamping head 210, and the cylinder body is located at the bottom of the clamping head 210, and is connected to and supported by the workpiece through the piston rod.

[0088] In a preferred embodiment, the support assembly includes a support seat 300; one end of the support seat 300 is fixedly mounted on the workbench 100, and the other end is mounted with a docking rod 310; the extension direction of the docking rod 310 is perpendicular to the first direction, one end is hinged with a first screw rod 320, and the other end is provided with a strip hole along the axial direction; a pin is slidably installed in the strip hole for connecting the second screw rod 330; the support seat 300 is provided with a third screw rod 340 with opposite rotation directions corresponding to the first screw rod 320 and the second screw rod 330; the third screw rod 340 is connected to the first screw rod 320 and the second screw rod 330 respectively through matching docking sleeves 350; the two ends of the docking sleeve 350 are provided with internal threads with opposite rotation directions for adjusting the height and angle of the docking rod 310.

[0089] In this embodiment, by rotating the docking sleeve 350, not only the height of the docking rod 310 but also the angle of the docking rod 310 can be adjusted, thereby ensuring the installation stability with the workpiece and further ensuring the pressing stability of the workpiece.

[0090] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the application to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A welding fixture for a slender frame part, characterized in that: include A workbench (100), the workbench (100) extending along a first direction, with a table surface for mounting a workpiece provided on the top; A supporting assembly, wherein the supporting assembly includes a plurality of supporting assemblies, which are fixedly mounted on the table and evenly arranged along the first direction, and are used to support and position the workpiece; A clamping assembly, the clamping assembly is located between two adjacent support assemblies, and comprises a base (200) slidably connected to the tabletop, and the sliding direction is perpendicular to the first direction; The base (200) is provided with a C-shaped clamping head (210) for clamping with the workpiece; A clamping mechanism is provided inside the clamping head (210) corresponding to the workpiece; two sides of the clamping head (210) are respectively provided with extension parts that can be extended and retracted along the first direction, and a clamping mechanism is provided corresponding to the workpiece; One end of the extension portion away from the clamping head (210) extends to above the support assembly, and the workpiece can be pressed onto the support assembly through the clamping mechanism; The extension portion comprises two racks (220) parallel to each other, and the extension direction is parallel to the first direction; The clamping head (210) is provided with a matching through hole corresponding to the rack (220) for sliding connection with the rack (220); The clamping head (210) is further provided with a driving wheel (230) corresponding to the two racks (220); The driving wheel (230) is rotatably mounted on the clamping head (210) and is located between the two racks (220) and is used to synchronously drive the two racks (220); The two racks (220) are meshingly connected with the driving wheel (230); The support assembly comprises a support seat (300); One end of the support seat (300) is fixedly mounted on the workbench (100), and the other end is provided with a docking rod (310); The extension direction of the docking rod (310) is perpendicular to the first direction, one end of the docking rod is hingedly connected to the first screw rod (320), and the other end is provided with a strip-shaped hole along the axial direction; A pin is slidably mounted in the strip-shaped hole and is used to connect the second screw rod (330); The support seat (300) is provided with third screw rods (340) with opposite rotation directions, corresponding to the first screw rod (320) and the second screw rod (330); The third screw rod (340) is connected to the first screw rod (320) and the second screw rod (330) respectively via matching butt sleeves (350); Both ends of the docking sleeve (350) are respectively provided with internal threads with opposite rotation directions, which are used to adjust the height and angle of the docking rod (310).

2. The welding fixture for the elongated frame parts according to claim 1 is characterized in that: The clamping mechanism comprises a docking block fixedly mounted on the end of the rack (220); A pressing cylinder (221) is vertically mounted on the docking block; The cylinder body of the pressing cylinder (221) is fixedly mounted above the docking block, and the piston rod extends to the bottom of the docking block.

3. The welding fixture for the elongated frame parts according to claim 2 is characterized in that: A pressing plate (222) is also mounted on the pressing cylinder (221); The pressing plate (222) is connected to the pressing cylinder (221) via a threaded sleeve (223); One end of the threaded sleeve (223) is fixedly connected to the pressing plate (222), and the other end is threadedly connected to the piston rod; The piston rod is provided with a matching external thread corresponding to the threaded sleeve (223), and a locking nut is also provided corresponding to the threaded sleeve (223).

4. The welding fixture for the elongated frame parts according to claim 1 is characterized in that: The clamping mechanism comprises a pressure head (240) located above the clamping head (210); The pressing head (240) is connected to the clamping head (210) via a threaded rod; The threaded rod is rotatably mounted on the clamping head (210), one end of which is threadedly connected to the pressing head (240), and the other end of which is coaxially and fixedly connected to the driving wheel (230).

5. The welding fixture for the elongated frame parts according to claim 4 is characterized in that: The clamping head (210) is further provided with a guide rod (241) corresponding to the pressing head (240); The guide rod (241) is parallel to the threaded rod, one end of which is fixedly mounted on the clamping head (210) and the other end of which is slidably connected to the pressing head (240); The pressure head (240) is provided with a matching docking hole corresponding to the guide rod (241).

6. The welding fixture for the elongated frame parts according to claim 5, characterized in that: A contact plate (242) is also provided on a side of the pressure head (240) away from the guide rod (241); A connecting pipe is provided on one side of the abutment plate (242) close to the pressure head (240); The connecting pipe is provided with an external thread for threaded connection with the pressure head (240); The pressure head (240) is provided with a matching threaded hole corresponding to the connecting pipe.

7. The welding fixture for the elongated frame parts according to claim 4, characterized in that: The clamping mechanism further comprises a lifting cylinder (250) installed below the clamping head (210); The cylinder body of the lifting cylinder (250) is fixedly mounted below the clamping head (210); the piston rod passes through the clamping head (210) and a support plate (251) is mounted on the end thereof; The support plate (251) is connected to the piston rod via a universal joint; One end of the universal joint is fixedly connected to the support plate (251), and the other end is threadedly connected to the piston rod.

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