An automatic DOC assembly and welding device

Abstract

The present invention discloses a DOC automatic assembly and welding device. It includes a mounting base plate, a right slide rail and a left slide rail. A first connection mechanism is slidably connected to the left slide rail, and a second connection mechanism is slidably connected to the right slide rail. The first connection mechanism is connected to a third pre-positioning wrench for driving the first connection mechanism to displace on the left slide rail. A left positioning disc for fitting against the end face of the connection cylinder is fixed on the first connection mechanism. The second connection mechanism is connected to a first pre-positioning wrench and a return wrench for driving the second connection mechanism to displace on the right slide rail. A right positioning disc for fitting against the end face of the DOC part is fixed on the second connection mechanism. Claws for clamping the side of the DOC part are fixed on the right positioning disc. The present invention can quickly perform pre-positioning of the DOC part and the connection cylinder and fixture clamping positioning, saving assembly time.

Description

Technical Field

[0001] The present invention belongs to the technical field of fixture manufacturing, and particularly relates to a DOC automatic assembly and welding device. Background Art

[0002] There is currently no dedicated national VI DOC automatic assembly and welding device in the prior art. Usually, a simple vertical positioning tool is used. The connecting cylinder is sleeved into the positioning die, the DOC parts are manually placed on the die positioning tray, and the connecting cylinder and the DOC parts are spot-welded using a MIG welding torch.

[0003] When manually assembling by the above method, the assembly parts need to be slowly placed, and the hands need to be fixed during spot welding. At the same time, due to manufacturing errors between the connecting cylinder and the DOC parts, the simple vertical positioning device cannot ensure the concentric position of the DOC parts in the connecting barrel. After spot welding, the two parts will be non-coaxial. During subsequent welding, there is a risk of failure to weld due to eccentricity and air leakage at the weld. The catalytic function of the DOC parts (DOC catalytic unit) fails, resulting in the failure of emission compliance. Moreover, this method can only be used for assembling and spot welding a fixed variety, and it is impossible to adapt to changes in multiple varieties and part sizes. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the above background art and provide a DOC automatic assembly and welding device.

[0005] The technical solution adopted by the present invention is: a DOC automatic assembly and welding device, including a mounting base plate. A right slide rail and a left slide rail are arranged at intervals on the mounting base plate. A first connection mechanism is slidably connected to the left slide rail, and a second connection mechanism is slidably connected to the right slide rail. The first connection mechanism is connected to a third pre-in-place wrench for driving the first connection mechanism to displace on the left slide rail. A left positioning disc for fitting the end face of the connecting cylinder is fixed on the first connection mechanism. A second pre-in-place wrench is fixed on the first connection mechanism. The second pre-in-place wrench is connected to a turning cylinder and a pressing bracket. The turning cylinder is used to drive the pressing bracket to press the side of the connecting cylinder. The second connection mechanism is connected to a first pre-in-place wrench and a return wrench for driving the second connection mechanism to displace on the right slide rail. A right positioning disc for fitting the end face of the DOC parts is fixed on the second connection mechanism. Claws for clamping the side of the DOC parts are fixed on the right positioning disc. The claws are connected to a claw pre-in-place wrench, and the claw pre-in-place wrench is connected to a claw cylinder. The claw cylinder drives the claw pre-in-place wrench to clamp the claws.

[0006] In a further preferably structure, the right slide rail is fixed to the top of the right positioning bracket, and the bottom of the right positioning bracket is fixed to the mounting base plate.

[0007] A further preferred structure is that the left slide rail is fixed to the top surface of the first bracket, and the bottom of the first bracket is fixed to the mounting base plate.

[0008] A further preferred structure is that a safety guard plate is fixed to the second connecting mechanism, and the safety guard plate is located between the claw and the pre-positioning wrench of the claw.

[0009] A further preferred structure is that a left positioning bracket is also fixed to the mounting base plate, and the left positioning bracket is used to support the connecting cylinder from the bottom of the connecting cylinder and contact the connecting cylinder surface.

[0010] A further preferred structure is that positioning rollers for contacting the surface of the connecting cylinder are provided inside the left positioning bracket. The connecting cylinder can roll in the positioning rollers to quickly find the positioning of the differential pressure holes.

[0011] A further preferred structure is that a second bracket is also fixed to the mounting base plate, the second bracket fixes a positioning wrench, and the positioning wrench is connected to a differential pressure hole positioning head for cooperating with the differential pressure holes on the side surface of the connecting cylinder.

[0012] A further preferred structure is that a cylinder body housing positioning wrench is fixed to the second bracket, and the cylinder body housing positioning wrench is connected to a first positioning cylinder.

[0013] A further preferred structure is that a DOC part positioning support rod is also fixed to the mounting base plate, and the DOC part positioning support rod is used to support the DOC part from the bottom of the DOC part and contact the side surface of the DOC part.

[0014] A further preferred structure is that the second connecting mechanism is connected to a second positioning cylinder.

[0015] The present invention can quickly perform pre-positioning of the DOC part and the connecting cylinder and fixture clamping positioning, saving assembly time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is the front view of the present invention;

[0018] Figure 3 is the top view of the present invention;

[0019] Figure 4 is the side view of the present invention;

[0020] Figure 5 is the assembly drawing of the DOC part and the connecting cylinder of the present invention.

[0021] In the figure, 1 - mounting base plate, 2 - right slide rail, 3 - first pre - in - place wrench, 4 - jaw pre - in - place wrench, 5 - safety guard plate, 6 - jaw, 7 - connecting cylinder (7 - 1 - differential pressure hole), 8 - pressing support, 9 - second pre - in - place wrench, 10 - left positioning disc, 11 - third pre - in - place wrench, 12 - first connecting mechanism, 13 - left slide rail, 14 - first support, 15 - left positioning support, 16 - second support, 17 - positioning wrench, 18 - right positioning support, 19 - flipping cylinder, 20 - first positioning cylinder, 21 - positioning roller, 22 - DOC part, 23 - differential pressure hole positioning head, 24 - return wrench, 25 - cylinder housing positioning wrench, 26 - jaw cylinder, 27 - second positioning cylinder, 28 - DOC part positioning support rod, 29 - right positioning disc, 30 - second connecting mechanism. Detailed implementation mode

[0022] The present invention will be further described in detail below with reference to the drawings and specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0023] As Figures 1-4 shown, the present invention includes a mounting base plate 1. A right slide rail 2 and a left slide rail 13 are arranged at intervals on the mounting base plate 1. A first connecting mechanism 12 is slidably connected to the left slide rail 13, and a second connecting mechanism 30 is slidably connected to the right slide rail 2. The first connecting mechanism 12 is connected to a third pre - in - place wrench 11 for driving the first connecting mechanism 12 to displace on the left slide rail 13. A left positioning disc 10 for fitting the end face of the connecting cylinder 7 is fixed on the first connecting mechanism 12. A second pre - in - place wrench 9 is fixed on the first connecting mechanism 12. The second pre - in - place wrench 9 is connected to a flipping cylinder 19 and a pressing support 8. The flipping cylinder 19 is used to drive the pressing support 8 to press the side of the connecting cylinder 7. The second connecting mechanism 30 is connected to a first pre - in - place wrench 3 and a return wrench 24 for driving the second connecting mechanism 30 to displace on the right slide rail 2. A right positioning disc 29 for fitting the end face of the DOC part 22 is fixed on the second connecting mechanism 30. A jaw 6 for clamping the side of the DOC part 22 is fixed on the right positioning disc 29. The jaw 6 is connected to a jaw pre - in - place wrench 4, and the jaw pre - in - place wrench 4 is connected to a jaw cylinder 26. The jaw cylinder 26 drives the jaw pre - in - place wrench 4 to clamp the jaw 6.

[0024] The right slide rail 2 is fixed to the top of the right positioning support 18, and the bottom of the right positioning support 18 is fixed to the mounting base plate 1.

[0025] The left slide rail 13 is fixed to the top surface of the first support 14, and the bottom of the first support 14 is fixed to the mounting base plate 1.

[0026] The safety guard plate 5 is fixed on the second connecting mechanism 30, and the safety guard plate 5 is located between the clamping jaw 6 and the pre-positioning wrench 4 of the clamping jaw.

[0027] The left positioning bracket 15 is also fixed on the mounting base plate 1. The left positioning bracket 15 is used to support the connecting cylinder 7 from the bottom of the connecting cylinder 7 and is in contact with the cylinder surface of the connecting cylinder 7.

[0028] A positioning roller 21 for contacting the cylinder surface of the connecting cylinder 7 is provided inside the left positioning bracket 15.

[0029] The second bracket 16 is also fixed on the mounting base plate 1. The second bracket 16 fixes the positioning wrench 17, and the positioning wrench 17 is connected to a differential pressure hole positioning head 23 for cooperating with the differential pressure hole 7-1 (as shown in Figure 5 the figure) on the side of the connecting cylinder 7.

[0030] The cylinder housing positioning wrench 25 is fixed on the second bracket 16, and the cylinder housing positioning wrench 25 is connected to the first positioning cylinder 20.

[0031] The DOC part positioning support rod 28 is also fixed on the mounting base plate 1. The DOC part positioning support rod 28 is used to support the DOC part 22 from the bottom of the DOC part 22 and is in contact with the side of the DOC part 22.

[0032] The first connecting mechanism 12 is connected to the second positioning cylinder 27.

[0033] The self-adaptive centering clamping jaw 6 of the present invention keeps the assembled parts in a coaxial position all the time.

[0034] The bottom of the device of the present invention is arranged on the left slide rail 13 and the right slide rail 2 to ensure that the position is adjustable and adapt to the changes in the lengths of different varieties.

[0035] The present invention adds a profiling bracket (left positioning bracket 15) and a differential pressure hole positioning head 23 in the device to prevent the connecting cylinder from rolling and moving axially.

[0036] The working process of the present invention:

[0037] The first pre-positioning wrench 3, the jaw pre-positioning wrench 4, the second pre-positioning wrench 9, the third pre-positioning wrench 11, the positioning wrench 17, and the return wrench 24 are in the open state; the connecting cylinder 7 is placed, and the third pre-positioning wrench 11 is pulled to drive the first connecting mechanism 12 to make the left positioning disc 10 and the end face of the connecting cylinder 7 coincide; the differential pressure hole positioning head 23 is pulled to push the positioning wrench 17 into the differential pressure hole 7-1 of the connecting cylinder 7, the second pre-positioning wrench 9 is pulled to drive the pressing bracket 8 to pre-press the connecting cylinder 7, and the flipping cylinder 19 pushes the pressing bracket 8 to clamp; after the return wrench 24 is pushed in place, the DOC part 22 is placed, the jaw pre-positioning wrench 4 is pulled to pre-clamp, and the jaw cylinder 26 acts to clamp the DOC part 22; after the first pre-positioning wrench 3 is pulled in place, the second positioning cylinder 27 acts to push the second connecting mechanism 30 and the right positioning disc 29 in place; the cylinder body outer shell positioning wrench 25 is pulled to position the outer circle of the connecting cylinder 7; after positioning and clamping are completed, the rotary table rotates for welding, and after welding is completed, it enters the next cycle.

[0038] In this embodiment, the mounting base plate 1 fixes the fixture on the welding rotating arm, the left / right push-pull the left positioning disc 10 and the right positioning disc 29 are used to clamp / loosen the parts, which is convenient for taking and placing the parts. The left positioning bracket 15 is provided with positioning rollers 21, which can quickly position the connecting cylinder 7; the manual quick wrench can quickly approach the jaws 6 and the left / right positioning discs to the parts and then the cylinder acts to clamp; the linkage mechanism has an anti-retreat function, and when reaching the positioning, the linkage angle is 180°; after the parts to be assembled are fixed, the second positioning cylinder 27 acts to move the right part fixture as a whole to the left, install the DOC part 22 into the connecting cylinder 7 and maintain the position dimensions; after welding is completed, the clamping cylinder is loosened, the second positioning cylinder 27 drives the fixture to move to the right, the flipping cylinder 19 is opened, and the positioning is manually loosened to take out the welded whole part.

[0039] It should be noted that the above embodiments are only relatively representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and there can be many variations. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention should be considered to fall within the protection scope of the present invention.

[0040] Here, it should be noted that the description of the above technical solutions is exemplary. This specification can be embodied in different forms and should not be construed as limited to the technical solutions described herein. On the contrary, providing these descriptions will make the disclosure of the present invention complete and thorough, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are only limited by the scope of the claims.

[0041] The shapes, sizes, ratios, angles, and numbers disclosed for describing aspects of this specification and the claims are merely examples, and thus, this specification and the claims are not limited to the details shown. In the following description, when the detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of this specification and the claims, the detailed description will be omitted.

[0042] When using the terms "comprising", "having", and "including" described in this specification, unless otherwise stated that it may also have another part or other parts, the terms used are generally singular but may also represent plural forms.

[0043] It should be noted that although the terms "first", "second", "top", "bottom", "one side", "the other side", "one end", "the other end", etc. may appear and be used in this specification to describe various different components, these components and parts should not be limited by these terms. These terms are only used to distinguish one component and part from another. For example, without departing from the scope of this specification, the first component may be referred to as the second component, and similarly, the second component may be referred to as the first component. In certain cases, the components at the top and bottom may also be swapped or converted with each other; the components at one end and the other end may have the same or different performances.

[0044] In addition, when constructing components, although there is no explicit description, it can be understood that there must be a certain error range.

[0045] When describing positional relationships, for example, when the positional order is described as "on...", "above...", "below...", and "next to...", unless words or terms such as "exactly" or "directly" are used, otherwise it may include the cases where they do not touch or touch each other. If it is mentioned that the first element is located "on" the second element, it does not mean that the first element must be located above the second element in the figure. The upper and lower parts of the component will change according to the change of the observation angle and orientation. Therefore, in the drawings or in the actual structure, if the situation where the first element is located "on" the second element is involved, it may include the situation where the first element is located "below" the second element and the situation where the first element is located "above" the second element. When describing temporal relationships, unless "exactly" or "directly" is used, when describing "after", "subsequent", "then", and "before", it may include the cases where the steps are not continuous. The features of various embodiments of the present invention can be combined or spliced partially or wholly with each other, and can be implemented in various different configurations as can be fully understood by those skilled in the art. The embodiments of the present invention can be implemented independently of each other, or can be implemented together in a mutually dependent relationship.

[0046] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. An automatic DOC assembly and welding device, characterized in that: It includes an installation base plate (1), on which a right slide rail (2) and a left slide rail (13) are arranged at intervals. A first connection mechanism (12) is slidably connected to the left slide rail (13), and a second connection mechanism (30) is slidably connected to the right slide rail (2). The first connection mechanism (12) is connected to a third pre-in-place wrench (11) for driving the first connection mechanism (12) to displace on the left slide rail (13). A left positioning disc (10) for fitting the end face of the connecting cylinder (7) is fixed on the first connection mechanism (12). A second pre-in-place wrench (9) is fixed on the first connection mechanism (12). The second pre-in-place wrench (9) is connected to a flipping cylinder (19) and a pressing bracket (8). The flipping cylinder (19) is used to drive the pressing bracket (8) to press the side of the connecting cylinder (7). The second connection mechanism (30) is connected to a first pre-in-place wrench (3) and a return wrench (24) for driving the second connection mechanism (30) to displace on the right slide rail (2). A right positioning disc (29) for fitting the end face of the DOC part (22) is fixed on the second connection mechanism (30). A claw (6) for clamping the side of the DOC part (22) is fixed on the right positioning disc (29). The claw (6) is connected to a claw pre-in-place wrench (4), and the claw pre-in-place wrench (4) is connected to a claw cylinder (26). The claw cylinder (26) drives the claw pre-in-place wrench (4) to clamp the claw (6). The right slide rail (2) is fixed to the top of the right positioning bracket (18), and the bottom of the right positioning bracket (18) is fixed to the installation base plate (1). The left slide rail (13) is fixed to the top surface of the first bracket (14), and the bottom of the first bracket (14) is fixed to the installation base plate (1). A safety guard plate (5) is fixed on the second connection mechanism (30), and the safety guard plate (5) is located between the claw (6) and the claw pre-in-place wrench (4). A left positioning bracket (15) is also fixed on the installation base plate (1), and the left positioning bracket (15) is used to support the connecting cylinder (7) from the bottom and contact the cylindrical surface of the connecting cylinder (7). A positioning roller (21) for contacting the cylindrical surface of the connecting cylinder (7) is arranged inside the left positioning bracket (15). A second bracket (16) is also fixed on the installation base plate (1). The second bracket (16) fixes a positioning wrench (17), and the positioning wrench (17) is connected to a differential pressure hole positioning head (23) for cooperating with the differential pressure hole (7-1) on the side of the connecting cylinder (7). A cylinder body outer shell positioning wrench (25) is fixed on the second bracket (16), and the cylinder body outer shell positioning wrench (25) is connected to a first positioning cylinder (20). A DOC part positioning support rod (28) is also fixed on the installation base plate (1), and the DOC part positioning support rod (28) is used to support the DOC part (22) from the bottom and contact the side of the DOC part (22). The second connection mechanism (30) is connected to a second positioning cylinder (27).

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