Positioning fixture for three-disc workpiece welding

Abstract

The utility model discloses a positioning fixture for three-disc workpiece welding, including a cover body positioning assembly, a connecting plate positioning assembly and an anti-skid plate positioning assembly; the cover body positioning assembly includes a bottom plate for placing the cover body, a pressing plate pressed on the top surface of the cover body, and a side positioning group arranged on the bottom plate and arranged along the side wall of the cover body for positioning the side wall of the cover body and a reinforcing strip; the side positioning group includes a pad arranged on the bottom plate for placing the side wall of the cover body and the reinforcing strip, an inner support seat for supporting the inner side of the side wall of the cover body, and an external pressure cylinder for pressing the reinforcing strip on the outer side of the side wall of the cover body; the connecting plate positioning assembly includes a pressing clamp installed on the upper surface of the pressing plate and a pressing block arranged on the pressing clamp pressure head and capable of pressing the connecting plate down on the cover body; the anti-skid plate positioning assembly includes a pressing cylinder installed on the bottom plate and a pressing rod arranged on the pressing cylinder and located above the pressing plate and capable of pressing the anti-skid plate on the upper surface of the cover body. The utility model can significantly improve the convenience and accuracy of welding.

Description

Technical Field

[0001] The utility model relates to the field of welding positioning, in particular to a positioning fixture used for three-disc workpiece welding. Background Art

[0002] like Figure 2 The workpiece marked as 100 is a three-blade disc workpiece for a lawn mower. It is the workpiece welded by the second welding process in the production of the three-blade disc assembly. It is mainly composed of a cover body 1 formed by the first welding process, a connecting plate 8 welded to the top surface of the cover body 1, an anti-skid plate 9 welded to the top surface of the cover body, and a reinforcing strip 10 welded to the outer side of the bottom of the cover body side wall 11.

[0003] In the prior art, when welding between various components, they are all positioned by manual hand-holding, that is, the operator presses the component to be welded against the cover with one hand, and holds the welding gun with the other hand to perform the welding operation. This positioning method not only increases the workload of the welder, but also leads to low positioning accuracy, affecting the overall accuracy of the workpiece, and therefore needs further improvement. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a positioning fixture for three-disc workpiece welding, which can significantly improve the convenience and accuracy of welding.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A positioning fixture for three-disk workpiece welding, characterized by comprising a cover body positioning assembly, a connecting plate positioning assembly and an anti-slip plate positioning assembly;

[0007] The cover body positioning assembly includes a bottom plate for placing the cover body, a pressing plate pressed on the top surface of the cover body, and a side positioning group arranged on the bottom plate and arranged along the side wall of the cover body for positioning the side wall of the cover body and the reinforcing strip;

[0008] The side positioning group includes a pad disposed on the bottom plate for placing the side wall of the cover body and the reinforcing strip, an inner support seat for supporting the inner side of the side wall of the cover body, and an external pressure cylinder for pressing the reinforcing strip against the outer side of the side wall of the cover body;

[0009] The connection plate positioning assembly comprises a pressing clamp installed on the upper surface of the pressing plate and a pressing block provided on the pressing head of the pressing clamp and capable of pressing the connection plate down onto the cover body;

[0010] The anti-slide plate positioning assembly comprises a pressing cylinder installed on the bottom plate and a pressing rod arranged on the pressing cylinder and located above the pressing plate and capable of pressing the anti-slide plate onto the upper surface of the cover body.

[0011] Preferably, the bottom plate has a plurality of support columns for supporting the lower surface of the cover body.

[0012] Preferably, the bottom plate is further provided with a plurality of positioning seats, the top surfaces of the positioning seats are used to support the lower surface of the cover body, and the positioning seats are provided with vertical screw rods, and the screw rods are equipped with locking nuts capable of pressing the pressure plate downward.

[0013] Preferably, a plurality of slots are provided on the bottom plate and the pressure plate.

[0014] Preferably, the bottom plate is further provided with a plurality of welding avoidance holes, and the plurality of welding avoidance holes are arranged along the positions of the welding reinforcement strips on the side wall of the cover body.

[0015] Preferably, the piston rod of the clamping cylinder has a rotating shaft, and the clamping rod is connected to the rotating shaft via a connecting rod.

[0016] Preferably, the base plate and the pressure plate are both connected with hanging rings.

[0017] The advantages of the utility model are:

[0018] 1. During welding, each positioning component can position each part to be welded, without the need for workers to hold the parts for positioning, which significantly improves the convenience of welding and the accuracy of positioning;

[0019] 2. The pressure plate is pressed on the upper surface of the cover body, which can shape the cover body as a whole and avoid deformation of the cover body during positioning and welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a positioning fixture for three-disc workpiece welding provided in this embodiment;

[0021] Figure 2 An exploded view of the positioning fixture for three-disc workpiece welding provided in this embodiment. DETAILED DESCRIPTION

[0022] Combination Figure 1 to Figure 2 The utility model is further described for the positioning fixture used for three-knife disc workpiece welding.

[0023] A positioning fixture for three-disk workpiece welding, characterized in that it comprises a cover body positioning component 3, a connecting plate positioning component 2 and an anti-slip plate positioning component 7.

[0024] The cover body positioning assembly 3 includes a bottom plate 32 for placing the cover body 1, a pressure plate 31 pressed on the top surface of the cover body 1, and a side positioning group 6 arranged on the bottom plate 32 and arranged along the side wall 11 of the cover body 1 for positioning the side wall 11 and the reinforcing strip 10 of the cover body 1; the side positioning group 6 includes a pad 62 arranged on the bottom plate 32 for placing the side wall 11 of the cover body 1 and the reinforcing strip 10, an inner support seat 63 for supporting the inner side of the side wall 11 of the cover body 1, and an external pressure cylinder 61 for pressing the reinforcing strip 10 against the outer side of the side wall 11 of the cover body 1; the connecting plate positioning assembly 2 includes a pressing clamp 21 installed on the upper surface of the pressing plate 31 and a pressing block 22 arranged on the pressure head of the pressing clamp 21 and capable of pressing the connecting plate 8 down on the cover body; the anti-slip plate positioning assembly 7 includes a pressing cylinder 71 installed on the bottom plate 32 and a pressing rod 72 arranged on the pressing cylinder 71 and located above the pressing plate 31 and capable of pressing the anti-slip plate 9 against the upper surface of the cover body 1.

[0025] Specifically, the bottom plate 32 has a plurality of support columns 15 for supporting the lower surface of the cover body 1. The lower end of each support column 15 is fixed to the bottom plate 32 by bolts, and the upper end surface supports the lower surface of the cover body 1. The plurality of support columns are evenly distributed on the bottom plate 32, so that the cover body 1 is evenly supported.

[0026] The bottom plate 32 is also provided with three positioning seats 14, the top surfaces of the positioning seats 14 are provided to support the lower surface of the cover body 1, and the positioning seats 14 are provided with vertical screws 12, and the screws 12 are provided with locking nuts 13 capable of pressing down the pressing plate 31. The positioning seats 14 include two vertical plates 141 fixed on the bottom plate 32 in a vertical state and a top plate 142 fixed on the top of the two vertical plates 141 in a parallel state, and the top surface of the top plate 142 can support the lower surface of the cover body 1 to further improve the stability of the cover body 1. The position of the screw 12 corresponds to the position of the mounting hole 16 on the cover body 1, and the screw 12 can pass through the cover body 1. At the same time, a corresponding avoidance hole is opened on the pressure plate 31 for the upper end of the screw 12 to pass through. Therefore, when the cover body 1 is supported on the positioning seat 14 and the pressure plate 31 is pressed on the upper surface of the cover body 1, the locking nut 13 is installed and tightened to press the pressure plate 31 on the cover body 1 to position the cover body 1 and avoid deformation of the cover body 1 when it is subjected to lateral pressure.

[0027] In this embodiment, the top view shape of the pressure plate 31 is similar to the top view shape of the cover body 1, and the only difference is that the pressure plate 31 is provided with an avoidance notch at the position of the welding component on the upper surface of the cover body 1. This structure can enable the pressure plate 31 to cover the upper surface of the cover body 1 as much as possible, thereby improving the positioning and shaping effects.

[0028] A plurality of slots are provided on the bottom plate 32 and the pressing plate 31. The slots can reduce the material and overall weight of the pressing plate 31 and the bottom plate 32, and can also help release stress of the bottom plate 32 and the pressing plate 31 themselves.

[0029] When the cover body 1 is in the positioning state, its cover opening is in the downward state, that is, the side wall 11 of the cover body 1 extends downward. Therefore, in order to enable the bottom of the side wall 11 and the bottom of the reinforcing strip 10 to be welded, a plurality of welding avoidance holes 321 are also opened on the bottom plate 32. The plurality of welding avoidance holes 321 are arranged along the position of the welding reinforcing strip 10 on the side wall 11 of the cover body 1. During welding, the welding gun can pass through the welding avoidance holes 321 from the back of the bottom plate 32 to weld the bottom surface of the reinforcing strip 10 and the bottom surface of the side wall 11 of the cover body 1, which significantly improves the convenience of welding; at the same time, the welding avoidance holes 321 can also save materials.

[0030] The pressing pliers 21 in the connecting plate positioning assembly 2 are of the prior art, and include a base, a connecting rod structure mounted on the base, a pressing head connected to the connecting rod structure and for the pressing block 22 to be mounted, and a driving handle connected to the connecting rod structure and capable of driving the pressing head to loosen or tighten. The base is fixed to the upper surface of the pressing plate through a mounting block. In this embodiment, the connecting plate positioning assembly 2 is provided with four groups, which respectively press down and position the four connecting plates 8 on the upper surface of the cover body 1, namely, the connecting plates 8 at the left front, left rear, right front, and right rear positions.

[0031] In the anti-slip plate positioning assembly 7, the piston rod of the clamping cylinder 71 has a rotating shaft, and the pressure rod 72 is connected to the rotating shaft through a connecting rod. Under this structure, the pressure rod 72 can rotate horizontally around the rotating shaft, which is convenient for placing and removing the cover body 1 and the anti-slip plate 9. That is, when the cover body 1 is not positioned, the pressure rod 72 is rotated outward so that the cover body 1 can be placed on the bottom plate 32 from top to bottom, and then the anti-slip plate 9 is placed to the position where it needs to be welded on the upper surface of the cover body 1, and then the pressure rod 72 is rotated inward to the top of the anti-slip plate 9. After the clamping cylinder 71 is contracted, the anti-slip plate 9 can be pressed on the cover body 1. After the welding is completed, the clamping cylinder 71 is extended, and the pressure rod 72 is rotated outward, and the cover body 1 can be taken out upward.

[0032] In order to improve the stability of the positioning of the anti-skid plate 9, two groups of anti-skid plate positioning components 7 are provided.

[0033] In the side positioning group 6, the inner support seat 63 has an inner support surface 631 for supporting the inner side of the side wall 11 of the cover body 1, and the outer pressure block 64 is provided on the external pressure cylinder 61. The outer pressure block 64 has an external pressure surface that matches the outer side surface of the reinforcement strip 10 or the outer side surface of the side wall 11 of the cover body 1. The shapes of the inner support surface 631 and the external pressure surface are adaptively matched with the shapes of the inner and outer side surfaces of the side wall 11 and the outer side surface of the reinforcement strip 10.

[0034] In this embodiment, in order to improve the positioning accuracy of the connecting plate 8 and the anti-slip plate 9 on the upper surface of the cover body 1, a positioning groove is provided at the position where the connecting plate 8 and the anti-slip plate 9 are welded on the upper surface of the cover body 1, and a pin that can be inserted into the slot is provided at the bottom of the connecting plate 8 and the anti-slip plate 9.

[0035] In order to facilitate the movement of the bottom plate 32 and the pressing plate 31 , the bottom plate 32 and the pressing plate 31 are both connected with hanging rings 5 ​​.

[0036] In order to facilitate the positioning of the tool on other devices such as welding machines, a quadrilateral mounting frame 4 is also connected to the back of the base plate 32 .

[0037] During the use of this tooling, the cover body positioning assembly 3, the connecting plate positioning assembly 2 and the anti-slip plate positioning assembly 7 can respectively position the cover body 1, the reinforcing plate 10, the connecting plate 8 and the anti-slip plate 9, so as to realize the overall positioning of the three-knife disc workpiece 100, without the need for staff to hold the positioning, which significantly improves the convenience of welding for the staff and the accuracy of positioning; the pressing plate 31 is pressed on the upper surface of the cover body 1, which can shape the cover body as a whole and avoid the problem of deformation of the cover body 1 during positioning and welding.

[0038] Unless otherwise specified, in the present utility model, if there are terms such as "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or position relationship in the present utility model are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0039] Unless otherwise specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A positioning fixture for three-disc workpiece welding, characterized by: It includes a cover body positioning component, a connecting plate positioning component and an anti-skid plate positioning component; The cover body positioning assembly includes a bottom plate for placing the cover body, a pressing plate pressed on the top surface of the cover body, and a side positioning group arranged on the bottom plate and arranged along the side wall of the cover body for positioning the side wall of the cover body and the reinforcing strip; The side positioning group includes a pad disposed on the bottom plate for placing the side wall of the cover body and the reinforcing strip, an inner support seat for supporting the inner side of the side wall of the cover body, and an external pressure cylinder for pressing the reinforcing strip against the outer side of the side wall of the cover body; The connection plate positioning assembly comprises a pressing clamp installed on the upper surface of the pressing plate and a pressing block provided on the pressing head of the pressing clamp and capable of pressing the connection plate down onto the cover body; The anti-slide plate positioning assembly comprises a pressing cylinder installed on the bottom plate and a pressing rod arranged on the pressing cylinder and located above the pressing plate and capable of pressing the anti-slide plate onto the upper surface of the cover body.

2. The positioning fixture for three-disc workpiece welding according to claim 1 is characterized in that: The bottom plate is provided with a plurality of support columns for supporting the lower surface of the cover body.

3. The positioning fixture for three-disc workpiece welding according to claim 1 is characterized in that: The bottom plate is also provided with a plurality of positioning seats, the top surfaces of the positioning seats are used to support the lower surface of the cover body, and the positioning seats are provided with vertical screw rods, and the screw rods are matched with locking nuts that can press the pressing plate downward.

4. The positioning fixture for three-disc workpiece welding according to claim 1 is characterized in that: The bottom plate and the pressing plate are both provided with a plurality of slots.

5. The positioning fixture for three-disc workpiece welding according to claim 1 is characterized in that: The bottom plate is also provided with a plurality of welding avoidance holes, which are arranged along the positions of the welding reinforcement strips on the side wall of the cover body.

6. The positioning fixture for three-disc workpiece welding according to claim 1 is characterized in that: The piston rod of the pressing cylinder is provided with a rotating shaft, and the pressing rod is connected to the rotating shaft through a connecting rod.

7. The positioning fixture for three-disc workpiece welding according to claim 1 is characterized in that: The bottom plate and the pressing plate are both connected with lifting rings.

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