Automatic tailor-welding device for inner door frame of forklift

Abstract

The utility model relates to the technical field of forklift accessory production, and discloses a forklift inner gantry automatic tailor-welding device which comprises a bottom frame, a first servo motor fixedly installed on the outer side of the bottom frame, a second servo motor fixedly installed on the outer side of the bottom frame, a third servo motor fixedly installed on the outer side of the bottom frame and a fourth servo motor fixedly installed on the outer side of the bottom frame. A fifth servo motor is fixedly installed on the outer side of the bottom frame, and a rotating disc is fixedly installed on the outer side of the bottom frame. According to the automatic tailor-welding device for the inner portal of the forklift, a head and tail frame type position changing machine is adopted, a workpiece is positively installed, the end of the portal is located in the length direction, the inner side of channel steel is located in the width direction, a middle cross beam is located in different modes according to the structure with holes or without holes, and the workpiece is automatically pressed through a corner air cylinder; all the mechanisms are adjusted to the needed positions through servo motor driving devices on all the positioning mechanisms, one-time clamping, tailor-welding and forming of an automatic tool can be achieved, and the situation that the tailor-welding quality is poor is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of forklift parts production, in particular to an automatic welding device for an inner door frame of a forklift. Background Art

[0002] A forklift refers to a variety of wheeled transport vehicles that are used for loading and unloading, stacking and short-distance transportation of palletized goods. The structural characteristics and working performance of the forklift are indicated by technical parameters such as rated lifting capacity, load center distance, and mast inclination angle. It is usually divided into internal combustion forklifts, electric forklifts and other types. During the welding process of the mast inside the forklift, an automatic welding device is required.

[0003] China Utility Model Patent Publication No.: CN 216029003 U, discloses: a forklift inner door frame welding positioning device, the forklift inner door frame welding positioning device can be connected to the support legs, improve the stability of the welding positioning device, and various types of parts can be stored through the storage box, but the forklift inner door frame welding positioning device cannot achieve one-time clamping and welding forming of automated tooling, which easily leads to unstable welding quality, and the forklift inner door frame welding positioning device has low positioning accuracy and cannot meet the high repeated positioning accuracy requirements of robot automatic welding, and has poor practicality. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide an automatic welding device for the inner door frame of a forklift, which can effectively solve the problems of inconvenience in realizing integrated welding and low positioning accuracy in the prior art.

[0005] The technical solution adopted by the utility model is: an automatic welding device for the inner door frame of a forklift, including a chassis, a servo motor 1 is fixedly installed on the outer side of the chassis, a servo motor 2 is fixedly installed on the outer side of the chassis, a servo motor 3 is fixedly installed on the outer side of the chassis, a servo motor 4 is fixedly installed on the outer side of the chassis, a servo motor 5 is fixedly installed on the outer side of the chassis, a turntable is fixedly installed on the outer side of the chassis, an upper beam moving and positioning assembly is arranged on the outer side of the chassis, a lower beam moving and positioning assembly is arranged on the outer side of the chassis, a middle beam positioning assembly with holes and a middle beam positioning assembly without holes are arranged on the outer side of the chassis, a support frame is fixedly installed on the outer side of the chassis, and a welding part body is arranged on the outer side of the chassis.

[0006] Preferably, the upper crossbeam moving positioning assembly includes an upper crossbeam positioning cylinder, an upper crossbeam hole positioning cylinder, an inner side positioning cylinder, a pushing cylinder, a drag chain, a movable clamping cylinder, a rotating clamping cylinder, a demolding device 1, an inner side clamping cylinder, and a base 1. The bottom of the upper crossbeam positioning cylinder is fixedly installed with the base 1, and the top of the base 1 is fixedly installed with the upper crossbeam hole positioning cylinder, the inner side positioning cylinder, a pushing cylinder, a drag chain, a movable clamping cylinder, a rotating clamping cylinder, a demolding device 1 and an inner side clamping cylinder. The servo motor 2 is fixedly installed with the base 1, and the upper crossbeam moving positioning assembly is slidably connected with the chassis.

[0007] Through the above technical solution, through the design of servo motor 2 and base 1, the upper beam moving positioning assembly can be moved before placing the workpiece, which improves the flexibility of the equipment, and the upper cylinder can be opened to fix the upper beam of the welded part body.

[0008] Preferably, the lower beam moving positioning assembly includes a side clamp one, a side clamp two, a demoulder two, a rotary clamp, a limit reference cylinder, an end face aligner, a lower beam clamping cylinder, and a base two; the side clamp one is fixedly installed on the bottom of the base two, and the side clamp two, the demoulder two, the rotary clamp, the limit reference cylinder, the end face aligner and the lower beam clamping cylinder are fixedly installed on the top of the base two; the servo motor three is fixedly installed on the base two, the lower beam moving positioning assembly is slidably connected to the base frame, and the welded component body is adapted to the lower beam moving positioning assembly.

[0009] Through the above technical solution, the horizontal movement of the lower beam moving positioning assembly can be achieved through the lower beam moving positioning assembly and the base frame, and through the design of multiple groups of cylinders above, the lower beam of the welded part body can be fixed to avoid displacement.

[0010] Preferably, the middle crossbeam positioning assembly with a hole includes a fixing frame, a middle crossbeam positioning cylinder, a middle crossbeam pressing cylinder, and a middle crossbeam end face aligning cylinder. The middle crossbeam positioning cylinder is fixedly installed on the top of the fixing frame, the middle crossbeam pressing cylinder is fixedly installed on the top of the fixing frame, and the middle crossbeam end face aligning cylinder is fixedly installed on the top of the fixing frame. The middle crossbeam positioning assembly with a hole is adapted to the hole of the welded component body.

[0011] Through the above technical solution, through the design of the positioning component with a middle crossbeam with a hole, multiple cylinders can be opened after the workpiece is placed, so as to fix the middle crossbeam with a hole of the welded part body, thereby avoiding displacement during the processing and causing the upper component to tip over.

[0012] Preferably, the hole-free middle crossbeam positioning assembly includes two fixing frames, two middle crossbeam positioning cylinders, two middle crossbeam pressing cylinders, and two middle crossbeam end face aligning cylinders. The second fixing frame has two middle crossbeam positioning cylinders fixedly installed on the top, the second fixing frame has two middle crossbeam pressing cylinders fixedly installed on the top, and the second fixing frame has two middle crossbeam end face aligning cylinders fixedly installed on the top. The hole-free middle crossbeam positioning assembly is compatible with the non-hole portion of the welded component body.

[0013] Through the above technical solution, through the design of the hole-free middle crossbeam positioning component, the hole-free part of the workpiece can be fixed and installed to avoid displacement of the workpiece during the assembly process, causing gaps in the welded parts and affecting normal production.

[0014] Preferably, two identical support frames are provided, and the two support frames are fixedly mounted to the base frame by bolts.

[0015] Through the above technical solution, through the design of two support frames, uniform support is provided, the stability of the overall structure is increased, and in combination with bolts, the efficiency of installation can be improved, which is convenient for later maintenance and replacement.

[0016] Preferably, the turntable is fixedly mounted on the support frame by bolts, and the turntable and the support frame are in one-to-one correspondence.

[0017] Through the above technical solution, the precise alignment between the turntable and the support frame is ensured through a one-to-one corresponding design, which has the characteristics of high repeat positioning accuracy and reliable connection, and increases the overall stability.

[0018] Compared with the prior art, the utility model provides an automatic welding device for the inner door frame of a forklift, which has the following beneficial effects:

[0019] 1. The automatic welding device for the inner door frame of the forklift adopts a head and tail frame type positioner. The workpiece is installed upright, with the end of the door frame positioned in the length direction, and the inner side of the channel steel is positioned in the width direction. The middle crossbeam adopts different positioning methods according to the structure with holes or without holes. The workpiece adopts the automatic clamping method of the angle cylinder. Through the servo motor drive device on each positioning mechanism, each mechanism is adjusted to the required position, which can realize the one-time clamping and welding of the automated tooling to avoid poor welding quality;

[0020] 2. The automatic welding device for the inner door frame of the forklift adopts a double-station system to improve production efficiency. The two turntables are respectively connected to the supports of the head and tail frames of the positioner. The tooling frame and the support are locked by screws, which has the characteristics of high repeated positioning accuracy and reliable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the upper crossbeam moving positioning assembly of the utility model;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the lower crossbeam moving positioning assembly of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the positioning assembly of the middle crossbeam with holes of the utility model;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the hole-free middle crossbeam positioning component of the utility model.

[0026] Among them: 1. chassis; 2. servo motor 1; 3. servo motor 2; 4. servo motor 3; 5. servo motor 4; 6. servo motor 5; 7. turntable; 8. upper crossbeam moving positioning assembly; 801. upper crossbeam positioning cylinder; 802. upper crossbeam hole positioning cylinder; 803. inner side positioning cylinder; 804. push cylinder; 805. drag chain; 806. mobile clamping cylinder; 807. rotating clamping cylinder; 808. demoulding device 1; 809. inner side clamping cylinder; 810. base 1; 9. lower crossbeam moving positioning assembly; 901. side clamp 1; 902. side clamp 2; 903. demoulding device 2; 904, rotary clamp; 905, limit reference cylinder; 906, end face aligner; 907, lower beam clamping cylinder; 908, base 2; 10, middle beam positioning assembly with hole; 1001, fixing frame 1; 1002, middle beam positioning cylinder 1; 1003, middle beam clamping cylinder 1; 1004, middle beam end face aligning cylinder 1; 11, middle beam positioning assembly without hole; 1101, fixing frame 2; 1102, middle beam positioning cylinder 2; 1103, middle beam clamping cylinder 2; 1104, middle beam end face aligning cylinder 2; 12, support frame; 13, weldment body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Embodiment 1: Figure 1-5As shown, the utility model provides an automatic welding device for the inner door frame of a forklift, including a base frame 1, a servo motor 2 is fixedly installed on the outer side of the base frame 1, a servo motor 3 is fixedly installed on the outer side of the base frame 1, a servo motor 3 is fixedly installed on the outer side of the base frame 1, a servo motor 4 is fixedly installed on the outer side of the base frame 1, a servo motor 5 is fixedly installed on the outer side of the base frame 1, a turntable 7 is fixedly installed on the outer side of the base frame 1, an upper beam moving positioning assembly 8 is arranged on the outer side of the base frame 1, a lower beam moving positioning assembly 9 is arranged on the outer side of the base frame 1, a middle beam positioning assembly 10 with holes is arranged on the outer side of the base frame 1, a middle beam positioning assembly 11 without holes is arranged on the outer side of the base frame 1, a support frame 12 is fixedly installed on the outer side of the base frame 1, and a welding part body 13 is arranged on the outer side of the base frame 1.

[0029] Specifically, the upper beam moving positioning assembly 8 includes an upper beam positioning cylinder 801, an upper beam hole positioning cylinder 802, an inner side positioning cylinder 803, a pushing cylinder 804, a drag chain 805, a moving pressing cylinder 806, a rotating pressing cylinder 807, a demoulding device 808, an inner side clamping cylinder 809, and a base 810. The upper beam positioning cylinder 801 is fixedly installed with a base 810 at the bottom, and the upper beam hole positioning cylinder 802, the inner side positioning cylinder 803, the pushing cylinder 804, the drag chain 805, the moving pressing cylinder 806, the rotating pressing cylinder 807, the demoulding device 808, the inner side clamping cylinder 809, and the base 810 are fixedly installed with the upper beam hole positioning cylinder 802, the inner side positioning cylinder 803, the pushing cylinder 804, the drag chain 805, the moving pressing cylinder 806, the rotating pressing cylinder 807, the demoulding device 808, the inner side clamping cylinder 809, and the base 810. The tightening cylinder 804, the chain dragger 805, the movable clamping cylinder 806, the rotating clamping cylinder 807, the demoulding device 808 and the inner side clamping cylinder 809, the servo motor 23 and the base 1 810 are fixedly installed, and the upper beam moving positioning assembly 8 is slidably connected to the base 1. The advantage is that through the design of the servo motor 23 and the base 1, the upper beam moving positioning assembly 8 can be moved before placing the workpiece, which improves the flexibility of the equipment, and the upper cylinder can be opened to fix the upper beam of the weldment body 13.

[0030] Specifically, the lower beam moving positioning assembly 9 includes a side clamp 1 901, a side clamp 2 902, a demoulding device 2 903, a rotary clamp 904, a limit reference cylinder 905, an end face aligner 906, a lower beam clamping cylinder 907, and a base 2 908. The bottom of the side clamp 1 901 is fixedly installed with a base 2 908, and the top of the base 2 908 is fixedly installed with the side clamp 2 902, the demoulding device 2 903, the rotary clamp 904, the limit reference cylinder 905, and the end face aligner 906. The surface aligner 906 and the lower beam clamping cylinder 907, the servo motor three 4 and the base two 908 are fixedly installed, the lower beam moving positioning component 9 and the base frame 1 are slidably connected, and the welding part body 13 is adapted to the lower beam moving positioning component 9. The advantage is that the horizontal movement of the lower beam moving positioning component 9 can be achieved through the lower beam moving positioning component 9 and the base frame 1, and through the design of multiple groups of cylinders on the upper side, the lower beam of the welding part body 13 can be fixed to avoid displacement.

[0031] Specifically, the middle beam positioning assembly 10 with a hole includes a fixing frame 1001, a middle beam positioning cylinder 1002, a middle beam pressing cylinder 1003, and a middle beam end face aligning cylinder 1004. The middle beam positioning cylinder 1002 is fixedly installed on the top of the fixing frame 1001, the middle beam pressing cylinder 1003 is fixedly installed on the top of the fixing frame 1001, and the middle beam end face aligning cylinder 1004 is fixedly installed on the top of the fixing frame 1001. The middle beam positioning assembly 10 with a hole is adapted to the hole of the welding part body 13. The advantage is that, through the design of the middle beam positioning assembly 10 with a hole, multiple cylinders can be opened after being placed on the workpiece to fix the middle beam with a hole of the welding part body 13, thereby avoiding displacement during the processing process and causing the upper assembly to tip over.

[0032] Embodiment 2: Figure 1-5 As shown, as an improvement on the previous embodiment, specifically, the hole-free middle beam positioning assembly 11 includes a second fixing frame 1101, a second middle beam positioning cylinder 1102, a second middle beam pressing cylinder 1103, and a second middle beam end face aligning cylinder 1104. The second middle beam positioning cylinder 1102 is fixedly installed on the top of the second fixing frame 1101, the second middle beam pressing cylinder 1103 is fixedly installed on the top of the second fixing frame 1101, and the second middle beam end face aligning cylinder 1104 is fixedly installed on the top of the second fixing frame 1101. The hole-free middle beam positioning assembly 11 is adapted to the non-hole portion of the weldment body 13. The advantage is that, through the design of the hole-free middle beam positioning assembly 11, the hole-free portion of the workpiece can be fixedly installed to avoid displacement of the workpiece during the assembly process, resulting in gaps in the welded joints and affecting normal production.

[0033] Specifically, two identical support frames 12 are provided, and the two support frames 12 are fixedly installed with the base frame 1 by bolts. The advantage is that the design of the two support frames 12 provides uniform support, increases the stability of the overall structure, and in combination with the bolts, improves the efficiency of installation, and facilitates later maintenance and replacement.

[0034] Specifically, the turntable 7 is fixedly installed on the support frame 12 by bolts, and the turntable 7 and the support frame 12 are one-to-one corresponding. The advantage is that the one-to-one corresponding design ensures the precise alignment between the turntable 7 and the support frame 12, and has the characteristics of high repeat positioning accuracy and reliable connection, and increases the overall stability.

[0035] Working principle: When in use, according to the length of the workpiece, servo motor 1 2, servo motor 2 3, servo motor 3 4, servo motor 4 5 and servo motor 5 6 move to drive the upper beam moving positioning component 8, the lower beam moving positioning component 9, the middle beam positioning component with holes 10 and the middle beam positioning component without holes 11 to the corresponding positions, and then the user loads the material. After the loading is completed, the clamping button is manually pressed to push the workpiece through the upper beam positioning cylinder 801, the upper beam hole positioning cylinder 802, the side clamp 1 901 and the side clamp 2 902, and then cooperate with the upper middle beam positioning cylinder 1002, the middle The crossbeam clamping cylinder 1003, the middle crossbeam end face aligning cylinder 1004, the middle crossbeam positioning cylinder 1102, the middle crossbeam clamping cylinder 1103 and the middle crossbeam end face aligning cylinder 1104 clamp the workpiece again, and then the workpiece is clamped by rotating the clamping cylinder 807 and the rotating clamp 904, and then the upper crossbeam and the middle crossbeam are loaded, and the above steps are repeated. After clamping the middle crossbeam, the robot can start spot welding the lower crossbeam, the upper crossbeam and the middle crossbeam, and then spot welding is performed first, and welding is performed again. After welding is completed, the above-mentioned fixing cylinders are released, and then the workpiece is lifted and demolded, waiting for unloading.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for a forklift inner door frame, comprising a base frame (1), characterized in that: A servo motor one (2) is fixedly mounted on the outer side of the base frame (1), a servo motor two (3) is fixedly mounted on the outer side of the base frame (1), a servo motor three (4) is fixedly mounted on the outer side of the base frame (1), a servo motor four (5) is fixedly mounted on the outer side of the base frame (1), a servo motor five (6) is fixedly mounted on the outer side of the base frame (1), a turntable (7) is fixedly mounted on the outer side of the base frame (1), an upper beam moving positioning assembly (8) is arranged on the outer side of the base frame (1), a lower beam moving positioning assembly (9) is arranged on the outer side of the base frame (1), a middle beam positioning assembly with a hole (10) and a middle beam positioning assembly without a hole (11) are arranged on the outer side of the base frame (1), a support frame (12) is fixedly mounted on the outer side of the base frame (1), and a welding part body (13) is arranged on the outer side of the base frame (1).

2. The automatic welding device for inner mast of a forklift according to claim 1, characterized in that: The upper crossbeam moving positioning assembly (8) comprises an upper crossbeam positioning cylinder (801), an upper crossbeam hole positioning cylinder (802), an inner side positioning cylinder (803), a pushing cylinder (804), a drag chain (805), a moving clamping cylinder (806), a rotating clamping cylinder (807), a demoulding device (808), an inner side clamping cylinder (809), and a base (810). The base (810) is fixedly installed at the bottom of the upper crossbeam positioning cylinder (801). The top of the base 1 (810) is fixedly installed with an upper beam hole positioning cylinder (802), an inner side positioning cylinder (803), a pushing cylinder (804), a drag chain (805), a movable clamping cylinder (806), a rotating clamping cylinder (807), a demoulder 1 (808) and an inner side clamping cylinder (809); the servo motor 2 (3) is fixedly installed with the base 1 (810); and the upper beam movable positioning assembly (8) is slidably connected with the base frame (1).

3. The automatic welding device for inner mast of a forklift according to claim 1, characterized in that: The lower cross beam moving and positioning assembly (9) comprises a side clamp one (901), a side clamp two (902), a demoulding device two (903), a rotary clamp (904), a limit reference cylinder (905), an end face aligner (906), a lower cross beam pressing cylinder (907), and a base two (908); the side clamp one (901) is fixedly mounted on the bottom of the base two (908); the side clamp two (902), the demoulding device two (903), the rotary clamp (904), the limit reference cylinder (905), the end face aligner (906) and the lower cross beam pressing cylinder (907) are fixedly mounted on the top of the base two (908); the servo motor three (4) is fixedly mounted on the base two (908); the lower cross beam moving and positioning assembly (9) is slidably connected to the base frame (1); and the welded component body (13) is adapted to the lower cross beam moving and positioning assembly (9).

4. The automatic welding device for inner mast of a forklift according to claim 1, characterized in that: The middle crossbeam positioning assembly (10) with a hole comprises a fixing frame (1001), a middle crossbeam positioning cylinder (1002), a middle crossbeam pressing cylinder (1003), and a middle crossbeam end face aligning cylinder (1004). The middle crossbeam positioning cylinder (1002) is fixedly installed on the top of the fixing frame (1001), the middle crossbeam pressing cylinder (1003) is fixedly installed on the top of the fixing frame (1001), and the middle crossbeam end face aligning cylinder (1004) is fixedly installed on the top of the fixing frame (1001). The middle crossbeam positioning assembly (10) with a hole is matched with the hole of the welding part body (13).

5. The automatic welding device for inner mast of a forklift according to claim 1, characterized in that: The hole-free middle crossbeam positioning assembly (11) comprises a second fixing frame (1101), a second middle crossbeam positioning cylinder (1102), a second middle crossbeam pressing cylinder (1103), and a second middle crossbeam end face aligning cylinder (1104). The second middle crossbeam positioning cylinder (1102) is fixedly installed on the top of the second fixing frame (1101), the second middle crossbeam pressing cylinder (1103) is fixedly installed on the top of the second fixing frame (1101), and the second middle crossbeam end face aligning cylinder (1104) is fixedly installed on the top of the second fixing frame (1101). The hole-free middle crossbeam positioning assembly (11) is compatible with the non-hole portion of the weldment body (13).

6. The automatic welding device for inner mast of a forklift according to claim 1, characterized in that: The support frames (12) are provided with two identical ones, and the two support frames (12) are fixedly mounted to the base frame (1) by means of bolts.

7. The automatic welding device for inner mast of a forklift according to claim 1, characterized in that: The turntable (7) is fixedly mounted on the support frame (12) by means of bolts, and the turntable (7) and the support frame (12) are in one-to-one correspondence.

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