CN111203666B

CN111203666B - Welding jig

Info

Publication number: CN111203666B
Application number: CN202010067379.3A
Authority: CN
Inventors: 宋瑞华
Original assignee: SUZHOU WID ELECTROMECHANICAL AUTOMATION CO Ltd
Current assignee: Jiangsu Weierdi Automation Co ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-11-10
Anticipated expiration: 2040-01-20
Also published as: CN111203666A

Abstract

The invention belongs to the technical field of welding, and discloses a welding jig, which comprises: the base plate, and can cooperate the first clamping subassembly, the second clamping subassembly, a pair of third clamping subassembly, a pair of fourth clamping subassembly, fifth clamping subassembly, sixth clamping subassembly and the seventh clamping subassembly of fixed chassis of waiting to weld. The invention can ensure that the frame, the support rod, the first springbar, the second springbar and the clamping spring of the underframe can have accurate positions during welding, thereby meeting the structural requirements of the underframe and reducing the reject ratio after the welding is finished. Simultaneously, the position of each clamping component except for the first clamping component is adjustable, so that the welding jig is high in adaptability, can meet the welding processing requirements of chassis products of different sizes and types to the maximum extent, avoids the problem that the production line is integrally reformed due to the structural change of the products, and reduces the re-investment cost of the production line.

Description

Welding jig

Technical Field

The invention relates to the technical field of welding, in particular to a welding jig.

Background

As shown in fig. 1, the bottom frame of a treadmill is an important component of a treadmill, and generally, the bottom frame of a conventional treadmill generally comprises a square frame and two support rods connected to one side of the frame, and the bottom frame is generally further provided with connectors for connecting the bottom frame with a handrail frame, a running platform, a damping cylinder and other components of the treadmill, such as clamp springs arranged at two corners of the frame away from the support rods, a first lug spring adjacent to the clamp springs, a second lug spring arranged on the frame between the two support rods, and a bottom wheel seat arranged at the end of the support rods for mounting a bottom wheel of the treadmill.

Since the chassis of the treadmill should bear the weight of the running deck, the handrail frame and the user of the treadmill, the chassis of the treadmill should have a high structural strength.

In view of the above-mentioned, the chassis structure of treadmill is irregular, the various characteristics of specification make it be difficult for through conventional tool clamping on the one hand, and its finished product welding seam of on the other hand distributes in just, anti, the side multiaspect of chassis for conventional welding equipment is difficult to be applicable to the welding production of treadmill chassis. Therefore, the underframe of the existing treadmill is mostly welded and produced by a large amount of manual work in a mode of circulating welding operation in multiple stations.

However, the frame, the square tube, the connector and the like are not fixed by standard jigs during manual welding operation, and the position accuracy after welding is poor. Moreover, the defective rate of the underframe is high due to the influence of welding experience of operators, operation proficiency and the like.

Therefore, the above problems need to be solved.

Disclosure of Invention

The invention aims to provide a welding jig which can clamp an underframe of a treadmill so as to facilitate welding processing of the underframe.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a welding jig for the fixed chassis by the treadmill of welding process, the chassis includes frame, branch, first auricular spring, second auricular spring and presss from both sides the spring, welding jig includes:

a base plate having a working face;

the first clamping assembly is fixedly connected with the bottom plate;

the second clamping assembly is connected with the bottom plate in a sliding mode and can slide along a first direction parallel to the working surface so as to adjust the distance between the second clamping assembly and the first clamping assembly;

the pair of third clamping assemblies are positioned between the first clamping assembly and the second clamping assembly and used for fixing the frame together with the first clamping assembly and the second clamping assembly, and the pair of third clamping assemblies are connected with the bottom plate in a sliding mode and can respectively slide along a second direction which is perpendicular to the first direction and parallel to the working surface;

the pair of fourth clamping assemblies are positioned on one side of the second clamping assembly, which is opposite to the first clamping assembly, and are used for fixing the supporting rod, and the pair of fourth clamping assemblies are connected with the bottom plate in a sliding manner and can slide along a second direction;

a fifth clamping assembly for fixing the first springbar so that the first springbar abuts against the frame;

a sixth clamping assembly for securing the second springbar such that the second springbar abuts the frame; and

and the seventh clamping assembly is used for fixing the clamping spring so as to enable the clamping spring to be abutted against the frame.

Preferably, the first clamping assembly, the second clamping assembly, the third clamping assembly and the fourth clamping assembly comprise clamping jaws, each clamping jaw comprises a first bearing, a first pressing block and a first air cylinder, each first bearing is provided with a bearing groove with an upward opening and two sides penetrating through the corresponding first bearing, each bearing groove is matched with the corresponding frame or the corresponding support rod, each first pressing block is fixed at the output end of the corresponding first air cylinder, and each first air cylinder can drive each first pressing block to abut against the corresponding frame or the corresponding support rod, so that the corresponding frame or the corresponding support rod is locked between the corresponding first pressing block and the corresponding first bearing.

Preferably, the first clamping assembly includes a pair of the clamping jaws arranged along the second direction, and the first sockets and the first cylinders of the pair of the clamping jaws are fixed to the bottom plate.

Preferably, the second clamping assembly comprises:

the pair of first sliding rails are fixedly connected with the bottom plate and extend along the first direction;

the pair of first sliding blocks are respectively connected with the pair of first sliding rails in a sliding manner;

the first carrier plate is fixed with the pair of first sliding blocks, and a pair of clamping jaws arranged along the second direction are arranged on the first carrier plate.

Preferably, the third clamping assembly comprises:

the two pairs of second sliding rails are fixedly connected with the bottom plate and extend along the second direction;

the two pairs of second sliding blocks are respectively connected with the two pairs of second sliding rails in a sliding manner;

and the two second carrier plates are respectively fixed with the two pairs of second sliding blocks, and the clamping jaws are arranged on the two second carrier plates.

Preferably, the fourth clamping assembly comprises:

the two pairs of third sliding rails are fixedly connected with the bottom plate and extend along the second direction;

the two pairs of third sliding blocks are respectively connected with the two pairs of third sliding blocks in a sliding manner;

and the two third carrier plates are respectively fixed with the two pairs of third sliding blocks, and a pair of clamping jaws arranged along the first direction are arranged on each of the two third carrier plates.

Preferably, the fifth clamping assembly comprises:

a pair of second air cylinders capable of moving synchronously with the pair of third clamping assemblies, respectively, output shafts of the pair of second air cylinders extending in the first direction;

the output shafts of the pair of third cylinders extend along the direction vertical to the working surface; and

and the pair of second pressing blocks are respectively fixed on the output shafts of the pair of third air cylinders, and each second pressing block is provided with a first embedding groove capable of embedding the first lug spring.

Preferably, the sixth clamping assembly comprises:

the fourth cylinder can move synchronously with the second clamping assembly, and an output shaft of the fourth cylinder extends in a direction perpendicular to the working surface;

the second bearing seat can move synchronously with the second clamping assembly, and is provided with a second embedding groove in which the second springbar can be embedded; and

and the third pressing block is fixed on the output shaft of the fourth cylinder, so that when the fourth cylinder contracts, the third pressing block can be abutted against the part of the second springbar protruding out of the second embedding groove, and the second springbar is locked between the third pressing block and the second bearing seat.

Preferably, the seventh clamping assembly comprises:

a pair of fifth cylinders capable of moving synchronously with the pair of third clamping assemblies, respectively, an output shaft of the pair of fifth cylinders extending in the second direction;

and the pair of positioning plates are fixedly connected with the output shafts of the pair of fifth cylinders respectively, one side of each positioning plate, facing the frame, is provided with a positioning rod matched with the connecting hole of the clamping spring, so that when the fifth cylinders contract, the positioning plates can be abutted against the clamping springs, and the positioning rods can be inserted into the connecting holes.

Preferably, the welding jig further comprises a pair of fool-proof mechanisms, the fool-proof mechanisms can be respectively in pair with the fourth clamping assemblies to move synchronously, each fool-proof mechanism comprises an output shaft extending along the first direction and a fool-proof cylinder, a fool-proof block is fixed on the output shaft of each fool-proof cylinder, the fool-proof block is provided with a fool-proof hole which can be inserted into the support rod in a proper manner, and the fixed position of the fool-proof block and the fixed position of the output shaft of each fool-proof cylinder are adjustable.

The invention has the beneficial effects that:

according to the welding jig provided by the invention, the first clamping assembly, the second clamping assembly, the pair of third clamping assemblies, the pair of fourth clamping assemblies, the fifth clamping assembly, the sixth clamping assembly and the seventh clamping assembly can be matched and fixed with the underframe to be welded, so that the frame, the support rod, the first lug spring, the second lug spring and the clamping spring of the underframe can have accurate positions during welding, the structural requirement of the underframe is met after welding is finished, and the reject ratio is reduced. Simultaneously, the position of each clamping component except for the first clamping component is adjustable, so that the welding jig is high in adaptability, can meet the welding processing requirements of chassis products of different sizes and types to the maximum extent, avoids the problem that the production line is integrally reformed due to the structural change of the products, and reduces the re-investment cost of the production line.

Drawings

FIG. 1 is a schematic structural diagram of a chassis in an embodiment of the invention;

FIG. 2 is a schematic structural view of a welding apparatus in an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a welding jig according to an embodiment of the present invention;

FIG. 4 is a schematic view of a first partial structure of a welding jig according to an embodiment of the present invention;

FIG. 5 is a schematic view of a second partial structure of the welding jig according to the embodiment of the present invention;

FIG. 6 is a schematic view of a third partial structure of the welding jig according to the embodiment of the present invention;

FIG. 7 is a schematic block diagram of a first station in an embodiment of the invention;

fig. 8 is a schematic structural view of a second station in the embodiment of the present invention.

In the figure:

100. a chassis; 101. a frame; 1011. c-shaped square tubes; 1012. a first square tube; 102. a strut; 1021. a second square tube; 103. a first springbar; 104. a second springbar; 105. a clamp spring; 106. a bottom wheel seat;

1. a first station; 11. a first turntable; 12. a third welding mechanism; 13. a frame jig; 14. a first magazine;

2. a second station; 21. a second turntable; 22. a fourth welding mechanism; 23. a support rod jig; 24. a second magazine;

3. indexing the rotary table;

4. a first welding mechanism;

5. a second welding mechanism;

6. a blanking mechanism;

7. welding a jig;

70. a clamping jaw; 701. a first bearing seat; 702. a first pressing block; 703. a first cylinder;

71. a base plate; 710. a working surface;

72. a first clamping assembly;

73. a second clamping assembly; 731. a first slide rail; 732. a first slider; 733. a first carrier plate;

74. a third clamping assembly; 741. a second slide rail; 742. a second slider; 743. a second carrier plate;

75. a fourth clamping assembly; 751. a third slide rail; 752. a third slider; 753. a third carrier plate;

76. a fifth clamping assembly; 761. a second cylinder; 762. a third cylinder; 763. a second pressing block;

77. a sixth clamping assembly; 771. a fourth cylinder; 772. a second bearing seat; 773. a third pressing block;

78. a seventh clamping assembly; 781. a fifth cylinder; 782. positioning a plate; 7821. positioning a rod;

79. a fool-proof mechanism; 791. a fool-proof cylinder; 792. a fool-proof block;

8. a stacking rack;

9. and (4) cleaning the gun.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

This embodiment provides a welding equipment, and this welding equipment can weld the chassis of processing treadmill high efficiency, high accuracy to can reduce the occupation of land space and the human input of equipment, in order to save manufacturing cost. The structure of the welding apparatus and the welding method will be specifically described below.

The present embodiment takes as an example the chassis 100 of the treadmill shown in fig. 1, the chassis 100 of the treadmill comprising a frame 101, a strut 102 and a first springbar 103, a second springbar 104 and a clamping spring 105.

Specifically, the frame 101 is composed of a C-shaped square pipe 1011 and a first square pipe 1012 that is adapted to the length of the opening side of the C-shaped square pipe 1011, and the C-shaped square pipe 1011 may be formed by bending a straight square pipe after double chamfering. A pair of supporting rods 102 are arranged in parallel on one side of the first square pipe 1012, which is far away from the C-shaped square pipe 1011, and the tail ends of the supporting rods 102 are provided with bottom wheel seats 106 for mounting bottom wheels of the treadmill. The upper surface of the middle section of the C-shaped square pipe 1011 is provided with a first springbar 103 for pivoting the running platform of the running machine. The side of the middle portion of the first tube 1012 is provided with a second springbar 104 for pivotally connecting the treadmill cushion cylinder. The two corners of the C-shaped square tube 1011 are provided with clamping springs 105 for fixing the treadmill handrail frame.

Referring to fig. 2, the welding apparatus provided in this embodiment includes a first station 1, a second station 2, an index turntable 3, a driving mechanism, a first welding mechanism 4, a second welding mechanism 5, and a blanking mechanism 6, where the first station 1 is used for welding a frame 101 of a formed bottom chassis 100. The second station 2 is used for welding the struts 102 of the profiled base frame 100. The indexing turntable 3 is provided with a welding jig 7 for clamping the underframe 100. The driving mechanism can drive the indexing turntable 3 to rotate, so that the welding jig 7 can be opposite to the first station 1, the first welding mechanism 4, the second station 2, the second welding mechanism 5 and the blanking mechanism 6 which are arranged on the peripheral side of the indexing turntable 3 in sequence.

By means of the structure, the specific welding method of the welding equipment can comprise the following steps:

s1, the C-shaped square pipe 1011 and the first square pipe 1012 for forming the frame 101 are fixed and welded to each other at the first station 1 to form the frame 101.

S2, the bottom wheel seat 106 for forming the strut 102 and the second square tube 1021 are fixed at the second station 2 and then welded to form the strut 102.

S3, the driving mechanism drives the welding jig 7 to rotate to face the first station 1, and the frame 101, the first springbar 103 and the clamping spring 105 are manually loaded and clamped on the welding jig 7.

S4, the driving mechanism drives the welding jig 7 to rotate to be opposite to the first welding mechanism 4, and the first welding mechanism 4 connects the frame 101, the first springbar 103 and the clamp spring 105 by welding.

S5, the driving mechanism drives the welding jig 7 to rotate to face the second station 2, and the rod 102 and the second springbar 104 are manually loaded and clamped on the welding jig 7.

And S6, the driving mechanism drives the welding jig 7 to rotate to be opposite to the second welding mechanism 5, and the second welding mechanism 5 connects the frame 101, the support rod 102 and the second springbar 104 in a welding manner.

And S7, the driving mechanism drives the welding jig 7 to rotate to be opposite to the blanking mechanism 6, after the welding jig 7 releases the bottom frame 100, the blanking mechanism 6 takes out the bottom frame 100, transfers and keeps the bottom frame 100 to be opposite to the second welding mechanism 5, and after the first welding jig 7 performs repair welding on the bottom surface of the bottom frame 100, the blanking mechanism 6 stacks the bottom frame 100.

By the welding equipment and the welding method, all work stations and welding mechanisms are annularly distributed by taking the indexing turntable 3 as the center of the equipment, so that the occupied space of the equipment is reduced. The underframe 100 is divided into a frame 101, a support rod 102, a first springbar 103, a second springbar 104, a clamping spring 105 and the like, and the parts are welded in sequence, so that the production cycle time is optimized. Meanwhile, the underframe 100 is fixed by the welding jig 7, so that the problem that the structures of the underframe 100 need to be repeatedly positioned in a production line type welding production mode can be avoided, the matching precision of the structures is improved, the welding quality can be ensured to the maximum extent, and the yield is improved.

To achieve the purpose of clamping the bottom frame 100, referring to fig. 3, in the present embodiment, the welding fixture 7 includes a bottom plate 71, a first clamping assembly 72, a second clamping assembly 73, a pair of third clamping assemblies 74, a pair of fourth clamping assemblies 75, a fifth clamping assembly 76, a sixth clamping assembly 77, and a seventh clamping assembly 78.

The bottom plate 71 has a flat working surface 710, and the working surface 710 is used as a mounting and operating reference surface for the seven clamping assemblies.

The first clamping assembly 72 is used for clamping the middle section of the C-shaped square pipe 1011 and fixedly connected with the bottom plate 71, so that the whole underframe has a positioning reference line relative to the bottom plate 71.

The second clamping assembly 73 is used for clamping a first square pipe 1012, is connected with the bottom plate 71 in a sliding mode, and can slide along a first direction parallel to the working surface 710 so as to adjust the distance between the second clamping assembly 73 and the first clamping assembly 72 and adapt to the structures of the bottom plates 71 with different models and specifications.

The pair of third clamping assemblies 74 are located between the first clamping assembly 72 and the second clamping assembly 73 and used for clamping two end portions of the C-shaped square pipe 1011, so that the frame 101 can be fixed together with the first clamping assembly 72 and the second clamping assembly 73, and the pair of third clamping assemblies 74 are connected with the bottom plate 71 in a sliding mode and can slide along a second direction perpendicular to the first direction and parallel to the working face 710 respectively to be adapted to structures of the bottom plates 71 with different models and specifications.

The pair of fourth clamping assemblies 75 are located on one side, opposite to the first clamping assembly 72, of the second clamping assembly 73 and are used for fixing the supporting rod 102, and the pair of fourth clamping assemblies 75 are connected with the bottom plate 71 in a sliding mode and can slide along the second direction to be adapted to structures of the bottom plates 71 of different models and specifications.

The fifth clamping assembly 76 is used for fixing the first springbar 103, so that the first springbar 103 abuts against the frame 101, and the first springbar 103 and the frame 101 can have a fixed relative position meeting a preset requirement during welding.

The sixth clamping assembly 77 is used for fixing the second springbar 104, so that the second springbar 104 abuts against the frame 101, and the second springbar 104 and the frame 101 can have a fixed relative position meeting the preset requirement during welding.

The seventh clamping assembly 78 is used for fixing the clamp spring 105, so that the clamp spring 105 abuts against the frame 101, and the clamp spring 105 and the frame 101 can have a fixed relative position meeting a preset requirement during welding.

Through the structure, the first clamping assembly 72, the second clamping assembly 73, the pair of third clamping assemblies 74, the pair of fourth clamping assemblies 75, the fifth clamping assembly 76, the sixth clamping assembly 77 and the seventh clamping assembly 78 are matched with and fixed on the underframe 100, so that the frame 101, the support rod 102, the first springbar 103, the second springbar 104 and the clamping spring 105 can be ensured to have accurate positions during welding, the structural requirements of the underframe 100 are met after welding is completed, and the reject ratio is reduced.

Meanwhile, the positions of the clamping assemblies except the first clamping assembly 72 are adjustable, so that the welding jig 7 is high in adaptability, the welding processing of underframe 100 products of different sizes and types can be met to the maximum extent, the production line is prevented from being integrally changed after the product structure is changed, and the re-investment cost of the production line is reduced.

Specifically, in this embodiment, each of the first clamping assembly 72, the second clamping assembly 73, the third clamping assembly 74, and the fourth clamping assembly 75 includes a clamping jaw 70, the clamping jaw 70 includes a first seat 701, a first pressing block 702, and a first cylinder 703, the first seat 701 has a receiving slot with an upward opening and two sides penetrating through the first seat 701, the receiving slot is adapted to the frame 101 or the support rod 102, the first pressing block 702 is fixed at an output end of the first cylinder 703, and the first cylinder 703 can drive the first pressing block 702 to press against the frame 101 or the support rod 102, so that the frame 101 or the support rod 102 is locked between the first pressing block 702 and the first seat 701.

It will be appreciated that the width of the socket is equal to or slightly larger than the width of the square pipe used to form the frame 101 or the support rod 102, and the output shaft of the first cylinder 703 is extended such that the distance between the first socket 701 and the first pressing block 702 is suitable for placing or taking the frame 101 or the support rod 102 into or out of the socket.

Illustratively, the first clamping assembly 72 includes a pair of clamping jaws 70 arranged along the second direction, and the first seats 701 and the first air cylinders 703 of the pair of clamping jaws 70 are fixed to the bottom plate 71, so that the C-shaped square pipe 1011 can be smoothly placed between the two first seats 701 of the first clamping assembly 72, and the C-shaped square pipe 1011 has an accurate positioning reference.

Illustratively, the second clamping assembly 73 includes a pair of first slide rails 731, a pair of first sliders 732, and a first carrier plate 733. The pair of first slide rails 731 are both fixedly connected to the bottom plate 71, and the first slide rails 731 extend along a first direction. The pair of first sliders 732 are slidably connected to the pair of first slide rails 731, respectively. The first carrier 733 is fixed to the pair of first sliders 732, and the pair of clamping jaws 70 arranged along the second direction is disposed on the first carrier 733, so that the pair of clamping jaws 70 disposed on the first carrier 733 can be driven to slide along the first direction. As shown in fig. 3, the first carrier 733 may be fixed to an output shaft (arranged in a first direction) of a cylinder so as to move by the telescopic action of the output shaft of the cylinder.

Illustratively, the third clamping assembly 74 includes two pairs of second slide rails 741, two pairs of second sliders 742, and two second carrier plates 743. The two pairs of second slide rails 741 are fixedly connected to the bottom plate 71, and the second slide rails 741 extend along the second direction. The two pairs of second sliders 742 are slidably connected to the two pairs of second slide rails 741 respectively. The two second carrier plates 743 are respectively fixed to the two pairs of second sliders 742, and the two second carrier plates 743 are both provided with the clamping jaws 70, so that the second carrier plates 743 can drive the clamping jaws 70 arranged thereon to slide along the second direction. As shown in fig. 3, the second carrier 743 can also be fixed with the output shaft of another cylinder (arranged in the second direction) so that the purpose of movement is achieved by the telescopic action of the output shaft of the cylinder.

Illustratively, the fourth clamping assembly 75 includes two pairs of third slide rails 751, two pairs of third sliders 752, and two third carrier plates 753. Two pairs of third sliding rails 751 are fixedly connected with the bottom plate 71, and the third sliding rails 751 extend along the second direction. The two pairs of third sliders 752 are slidably connected to the two pairs of third sliders 752, respectively. The two third carrier plates 753 are respectively fixed to the two pairs of third sliders 752, and a pair of clamping jaws 70 arranged along the first direction are disposed on each of the two third carrier plates 753, so that the clamping jaws 70 disposed on the third carrier plates 753 can be driven to slide along the second direction. Similarly, as shown in fig. 3, the third carrier plate 753 may be fixed with the output shaft of another cylinder (arranged in the second direction) for movement by the telescopic action of the cylinder output shaft.

Illustratively, referring to fig. 3 and 4, the fifth clamping assembly 76 includes a pair of second air cylinders 761, a pair of third air cylinders 762, and a pair of second pressing pieces 763. The pair of second cylinders 761 are movable in synchronization with the pair of third clamp assemblies 74, respectively, and output shafts of the pair of second cylinders 761 extend in the first direction. The pair of third cylinders 762 are fixed to output shafts of the pair of second cylinders 761, respectively, and the output shafts of the pair of third cylinders 762 extend in a direction perpendicular to the working surface 710. The pair of second pressing pieces 763 are fixed to output shafts of the pair of third cylinders 762, respectively, and the second pressing pieces 763 have first fitting grooves into which the first springbar 103 can be fitted. Therefore, during operation, the second air cylinder 761 can make the second pressing block 763 avoid the first bearing seat 701 after extending out, the welding jig 7 is conveniently put into the C-shaped square pipe 1011, the third air cylinder 762 can make a space for putting in the first springbar 103 formed between the second pressing block 763 and the C-shaped square pipe 1011 after extending out, the first springbar 103 is conveniently and manually embedded in the first embedding groove, and after the third air cylinder 762 contracts, the first springbar 103 is connected with the C-shaped square pipe 1011 in an abutting mode.

Referring to fig. 3 and 5, the sixth clamping assembly 77 includes a fourth cylinder 771, a second seat 772, and a third press block 773. The fourth cylinder 771 can move in synchronization with the second gripper assembly 73, and the output shaft of the fourth cylinder 771 extends in a direction perpendicular to the working surface 710. The second socket 772 is capable of moving synchronously with the second clamping assembly 73, and the second socket 772 has a second insertion groove capable of inserting the second springbar 104. The third pressing block 773 is fixed to the output shaft of the fourth cylinder 771, so that when the fourth cylinder 771 contracts, the third pressing block 773 can press against the portion of the second springbar 104 protruding out of the second embedding groove, so that the second springbar 104 is locked between the third pressing block 773 and the second seat 772. Therefore, during operation, the output shaft of the fourth cylinder 771 extends out, so that a space for the second springbar 104 to be placed in the second embedding groove is formed between the second bearing 772 and the third pressing block 773, and after the second springbar 104 is manually placed in the second embedding groove, the output shaft of the fourth cylinder 771 contracts, so that the third pressing block 773 can press and fix the second springbar 104. It will be appreciated that the second socket 772 is disposed at a position such that the second springbar 104 is just abutted against the side of the first square tube 1012 after the second springbar 104 is placed in the second insertion groove.

Referring again to fig. 3 and 4, the seventh clamping assembly 78 includes a pair of fifth pneumatic cylinders 781 and a pair of positioning plates 782, for example. The pair of fifth air cylinders 781 are movable in synchronization with the pair of third clamping assemblies 74, respectively, and output shafts of the pair of fifth air cylinders 781 extend in the second direction. A pair of locating plate 782 links firmly with the output shaft of a pair of fifth cylinder 781 respectively, and one side that a pair of locating plate 782 faced frame 101 all is provided with the locating lever 7821 with the connecting hole adaptation of pressing from both sides spring 105 to when fifth cylinder 781 contracts, locating plate 782 can with press from both sides spring 105 butt, and locating lever 7821 can insert and arrange in the connecting hole. Therefore, during operation, the clamp spring 105 can be conveniently clamped on the C-shaped square pipe 1011 manually and then the clamp spring 105 is fixed through the seventh clamping component 78.

Referring to fig. 6, since the supporting rod 102 is used for mounting the bottom wheel, the supporting rod 102 has a specific placing posture, that is, cannot be inverted up and down, so as to prevent the supporting rod 102 from being welded by mistake due to manual incorrect placement, the welding jig 7 may further include a pair of fool-proof mechanisms 79, the pair of fool-proof mechanisms 79 may respectively move synchronously with the pair of fourth clamping assemblies 75, the fool-proof mechanisms 79 include fool-proof cylinders 791 having output shafts extending along the first direction, fool-proof blocks 792 are fixed on the output shafts of the fool-proof cylinders 791, the fool-proof blocks 792 have fool holes adapted to be plugged into the supporting rod 102 with correct placing posture, and fixing positions of the fool-proof blocks 792 and the output shafts of the fool-proof cylinders 791. Therefore, during operation, if the fool-proof hole can be plugged with the fool-proof block 792 in a matching manner when the support rod 102 is placed manually, the support rod 102 can be placed into the clamping jaw 70 of the fourth clamping assembly 75, otherwise, the support rod 102 cannot be placed, and therefore the bad situation that the support rod 102 is welded incorrectly due to manual incorrect placement is avoided. In addition, the fixed position of the fool-proof block 792 and the output shaft of the fool-proof cylinder 791 is adjustable, so that the fool-proof mechanism 79 can be adapted to the base frames 100 of different specifications and sizes.

The work stations and the work station arrangement of the welding mechanism are described in detail below.

Referring to fig. 2, in the present embodiment, a first station, a second station, a third station, a fourth station, a fifth station and a sixth station may be sequentially disposed around the indexing turntable 3, and the six stations are uniformly divided around the indexing turntable 3, so that the driving mechanism drives the turntable to rotate at an equal angle each time, and then the welding jig 7 is sequentially opposite to the six stations.

Alternatively, the driving mechanism may be a cam divider or an Rv reducer, etc., to drive the indexing rotary disk 3 to rotate equally.

Preferably, six welding jigs 7 are uniformly arranged on the indexing rotary table 3, so that when the driving mechanism drives the indexing rotary table 3 to rotate, each jig can be alternately opposite to the first station, the second station, the third station, the fourth station, the fifth station and the sixth station, and each station can be simultaneously subjected to welding, loading and unloading operation and the like.

The first station is provided with a first station 1 and a first magazine 14, and the first magazine 14 is used for storing a clamp spring 105 and a first springbar 103. This arrangement mode can be convenient for artifical the turning can load the frame 101 that first worker station 1 welding obtained, and clamp spring 105 and first springbar 103 in first magazine 14 to welding jig 7 of first station department, shortens the website beat of first station.

Alternatively, the number of first magazine 14 may be two to store clip spring 105 and first springbar 103, respectively. Of course, first magazine 14 may also have two pockets for storing clamp spring 105 and first springbar 103, respectively.

Alternatively, first magazine 14 may be suspended above the portion of indexing carousel 3 located at the first station, so as to facilitate manual access to clamp spring 105 and first springbar 103 within first magazine 14, reducing the time from access to assembly of clamp spring 105 and first springbar 103 to frame 101.

Referring to fig. 7, in the embodiment, the first station 1 includes a first rotary table 11 and a third welding mechanism 12, frame jigs 13 are respectively disposed at two opposite ends of the first rotary table 11, the frame jigs 13 can fix a C-shaped square pipe 1011 and a first square pipe 1012 for forming the frame 101, and the first rotary table 11 can alternately move the two frame jigs 13 to be opposite to the third welding mechanism 12 after rotating, so that the third welding mechanism 12 can weld the C-shaped square pipe 1011 and the first square pipe 1012 together.

In view of the above structure, the welding method provided by the present embodiment may further include: when the third welding mechanism 12 welds the C-shaped square pipe 1011 and the first square pipe 1012 on one of the frame jigs 13, the C-shaped square pipe 1011 and the first square pipe 1012 to be welded are manually loaded on the other frame jig 13.

Optionally, the structure of the frame fixture 13 may refer to the structure of the first clamping assembly 72, the second clamping assembly 73, and the third clamping assembly 74 for fixing the C-shaped square tube 1011 and the first square tube 1012 in the welding fixture 7, which is not described herein again.

The first welding mechanism 4 is disposed at a second station adjacent to the first station, so that the first welding mechanism 4 can weld the clamp spring 105 and the first springbar 103 to the frame 101 in advance, and the welding operation is divided.

A third station, which is adjacent to the second station, is provided with a second station 2 and a second magazine 24 for storing a second springbar 104.

The second magazine 24 can be arranged in the middle of the second station 2 and the indexing turntable 3 to manually take the second springbar 104 for loading, and the second magazine 24 can be placed on the magazine carrier, so that manual quick taking and quick replenishment are facilitated.

Referring to fig. 8, in the present embodiment, the second station 2 includes a second rotary table 21 and a fourth welding mechanism 22, two opposite ends of the second rotary table 21 are respectively provided with a support rod fixture 23, the support rod fixture 23 can fix the bottom wheel seat 106 and the second square tube 1021 for forming the support rod 102, and the second rotary table 21 can alternately move the two support rod fixtures 23 to be opposite to the fourth welding mechanism 22 after rotating, so that the fourth welding mechanism 22 can weld and connect the bottom wheel seat 106 and the second square tube 1021.

In view of the above structure, the welding method provided by the present embodiment may further include: when the fourth welding mechanism 22 welds the bottom wheel seat 106 and the second square tube 1021 on one of the support bar jigs 23, the bottom wheel seat 106 and the second square tube 1021 to be welded are manually loaded on the other support bar jig 23.

It should be noted that, since the number of struts 102 and frames 101 in each base frame 100 is 2:1, the rate of welding the production struts 102 at the second station 2 is at least twice the rate of welding the production frames 101 at the first station 1 to meet the tact requirement.

In this embodiment, in order to adapt to and improve the production tact of the production line, the second welding mechanisms 5 are disposed at the fourth station and the fifth station, and the two second welding mechanisms 5 are used for welding and connecting the frame 101, the support rod 102, and the second springbar 104. Among them, the bonding wires of the frame 101, the first springbar 103, the second springbar 104 and the clamp spring 105 can be uniformly distributed to the two second welding mechanisms 5, so as to improve the welding efficiency.

In view of the above structure, the second welding mechanism 5 at the fourth station is also used to perform the first repair welding of the frame 101, the first springbar 103, and the clamp spring 105. And, the second welding mechanism 5 at the fifth station is also used for performing second repair welding on the frame 101, the first springbar 103 and the clamp spring 105. Thereby further differentiating the wire distribution of frame 101, first springbar 103, second springbar 104 and clamping spring 105 and improving the welding efficiency.

Referring to fig. 2, a blanking mechanism 6 is disposed at the sixth station, and the blanking mechanism 6 is used for transferring the chassis 100.

Alternatively, the blanking mechanism 6 may include a manipulator, a clamp and a driving portion, the clamp includes a substrate fixedly connected to the movable end of the manipulator, and two clamping blocks disposed at an interval and slidably connected to the substrate, and the driving portion is configured to drive the two clamping blocks to move toward or away from each other, so as to clamp or release the chassis 100.

In particular, the blanking mechanism 6 can transfer and hold the bottom chassis 100 to the bottom surface opposite to the second welding mechanism 5 at the fifth station, so that the repair welding can be performed on the bottom surface of the bottom chassis 100 in this manner.

In order not to interrupt the blanking process of the welding equipment, the welding equipment further comprises at least two stacking racks 8 which are arranged adjacent to the blanking mechanism 6, the stacking racks 8 are provided with a plurality of bearing positions for bearing the underframe 100, so that the stacking racks 8 can be manually transferred after one stacking rack 8 is fully loaded, and the other empty stacking rack 8 can be used as a spare for uninterruptedly receiving the welded underframe 100.

In this embodiment, to enable automatic welding, the first welding mechanism 4, the second welding mechanism 5, the third welding mechanism 12, and the fourth welding mechanism 22 each include a welding robot for automatically welding the undercarriage 100, and a gun cleaner 9 for removing welding slag on a welding gun of the welding robot. The gun cleaner 9 can be an automatic gun cleaner 9, and the gun cleaning time interval can be adjusted according to the actual welding condition and the finally configured welding power supply setting. The welding robot and the gun cleaner 9 are both prior art and are not described herein.

In addition, for the purpose of reducing space occupation and compact layout as much as possible, in order to ensure efficient operation and prevent conduit and cable scratches, the first welding mechanism 4, the second welding mechanism 5, the third welding mechanism 12 and the fourth welding mechanism 22 may all adopt cable built-in manipulators.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a welding tool for fix chassis (100) by the treadmill of welding process, chassis (100) include frame (101), branch (102), first springbar (103), second springbar (104) and clamp spring (105), its characterized in that, welding tool includes:

a base plate (71) having a working surface (710);

a first clamping assembly (72) fixedly connected with the bottom plate (71);

a second clamping assembly (73) slidably connected to the base plate (71) and slidable in a first direction parallel to the working surface (710) to adjust the distance between the second clamping assembly and the first clamping assembly (72);

a pair of third clamping assemblies (74) which are positioned between the first clamping assembly (72) and the second clamping assembly (73) and used for fixing the frame (101) together with the first clamping assembly (72) and the second clamping assembly (73), wherein the pair of third clamping assemblies (74) are connected with the bottom plate (71) in a sliding manner and can respectively slide along a second direction which is perpendicular to the first direction and is parallel to the working surface (710);

the pair of fourth clamping assemblies (75) are positioned on one side, opposite to the first clamping assembly (72), of the second clamping assembly (73) and are used for fixing the support rod (102), and the pair of fourth clamping assemblies (75) are connected with the bottom plate (71) in a sliding mode and can slide along the second direction;

a fifth clamping assembly (76) for securing the first springbar (103) such that the first springbar (103) abuts the frame (101);

a sixth clamping assembly (77) for fixing the second springbar (104) so that the second springbar (104) abuts the frame (101); and

a seventh clamping assembly (78) for securing the clamping spring (105) such that the clamping spring (105) abuts the frame (101).

2. Welding jig according to claim 1, characterized in that the first clamping assembly (72), the second clamping assembly (73), the third clamping assembly (74) and the fourth clamping assembly (75) each comprise a clamping jaw (70), the clamping jaw (70) comprises a first bearing seat (701), a first pressing block (702) and a first air cylinder (703), the first bearing seat (701) is provided with a bearing groove with an upward opening and two sides penetrating through the first bearing seat (701), the bearing groove is matched with the frame (101) or the support rod (102), the first pressing block (702) is fixed at the output end of the first air cylinder (703), the first air cylinder (703) can drive the first pressing block (702) to press against the frame (101) or the supporting rod (102), so that the frame (101) or the strut (102) is locked between the first pressing piece (702) and the first socket (701).

3. The welding jig according to claim 2, characterized in that the first clamping assembly (72) comprises a pair of said clamping jaws (70) arranged along the second direction, the first seats (701) of the pair of clamping jaws (70) and the first cylinder (703) being fixed with the bottom plate (71).

4. The welding jig of claim 2, wherein the second clamping assembly (73) comprises:

a pair of first sliding rails (731) fixedly connected to the bottom plate (71), wherein the first sliding rails (731) extend along the first direction;

a pair of first sliders (732) slidably connected to the pair of first slide rails (731), respectively;

and the first carrier plate (733) is fixed with the pair of first sliding blocks (732), and the pair of clamping jaws (70) arranged along the second direction are arranged on the first carrier plate (733).

5. The welding jig of claim 2, wherein the third clamping assembly (74) comprises:

two pairs of second sliding rails (741) which are fixedly connected with the bottom plate (71), wherein the second sliding rails (741) extend along the second direction;

two pairs of second sliding blocks (742) which are respectively connected with the two pairs of second sliding rails (741) in a sliding manner;

and the two second carrier plates (743) are respectively fixed with the two pairs of second sliding blocks (742), and the clamping jaws (70) are arranged on the two second carrier plates (743).

6. The welding jig of claim 2, wherein the fourth clamping assembly (75) comprises:

two pairs of third sliding rails (751) which are fixedly connected with the bottom plate (71), wherein the third sliding rails (751) extend along the second direction;

two pairs of third sliding blocks (752) which are respectively connected with the two pairs of third sliding blocks (752) in a sliding way;

and the two third carrier plates (753) are respectively fixed with the two pairs of third sliding blocks (752), and a pair of clamping jaws (70) arranged along the first direction are arranged on each of the two third carrier plates (753).

7. The welding jig of claim 1, wherein the fifth clamping assembly (76) comprises:

a pair of second cylinders (761) that are movable in synchronization with the pair of third clamp assemblies (74), respectively, an output shaft of the pair of second cylinders (761) extending in the first direction;

a pair of third cylinders (762) fixed to output shafts of the pair of second cylinders (761), respectively, and having output shafts of the pair of third cylinders (762) extending in a direction perpendicular to the working surface (710); and

and a pair of second pressing pieces (763) respectively fixed to output shafts of the pair of third cylinders (762), wherein the second pressing pieces (763) have first fitting grooves into which the first springbars (103) can be fitted.

8. Welding jig according to claim 1, characterized in that the sixth clamping assembly (77) comprises:

a fourth cylinder (771) movable in synchronization with the second gripper assembly (73), an output shaft of the fourth cylinder (771) extending in a direction perpendicular to the work surface (710);

a second seat (772) capable of moving synchronously with the second clamping assembly (73), wherein the second seat (772) is provided with a second embedding groove capable of embedding the second springbar (104); and

a third pressing block (773) fixed to the output shaft of the fourth cylinder (771), so that when the fourth cylinder (771) contracts, the third pressing block (773) can press against the part of the second springbar (104) protruding out of the second embedding groove, and the second springbar (104) is locked between the third pressing block (773) and the second seat (772).

9. The welding jig of claim 1, wherein the seventh clamping assembly (78) comprises:

a pair of fifth cylinders (781) capable of moving synchronously with the pair of third clamping assemblies (74), respectively, an output shaft of the pair of fifth cylinders (781) extending in the second direction;

a pair of locating plate (782), it is a pair of respectively with the output shaft of fifth cylinder (781) links firmly, and is a pair of locating plate (782) orientation one side of frame (101) all be provided with locating lever (7821) of the connecting hole adaptation of clamp spring (105), with when fifth cylinder (781) contracts, locating plate (782) can with press from both sides spring (105) butt, just locating lever (7821) can insert and arrange in the connecting hole.

10. The welding jig of claim 1, further comprising a pair of fool-proof mechanisms (79), wherein the pair of fool-proof mechanisms (79) can move synchronously with the pair of fourth clamping assemblies (75), the fool-proof mechanisms (79) comprise fool-proof cylinders (791) with output shafts extending along the first direction, fool-proof blocks (792) are fixed on the output shafts of the fool-proof cylinders (791), the fool-proof blocks (792) are provided with fool-proof holes which can be inserted into the support rods (102) with correct placement postures, and the fixed positions of the fool-proof blocks (792) and the output shafts of the fool-proof cylinders (791) are adjustable.