Fixture for guaranteeing welding dimensional tolerance of rear sealing seat assembly

Abstract

The utility model discloses a clamp for guaranteeing welding dimensional tolerance of a rear sealing seat assembly and belongs to the technical field of welding clamps. The bottom plate is connected with the lower end of the pull rod in an inserted mode and fixed to the lower end of the support. The outer side of the pull rod is sleeved with a pressing plate, and a first wedge block is arranged at the upper end of the pressing plate and inserted into the pull rod; the upper end of the support is connected with the lining in an inserted mode, the lining is connected with one end of the mandrel in an inserted mode, the outer wall of the lining is provided with an inserting groove, the second wedge block is arranged in the inserting groove, the wedge face of the second wedge block is matched with one end of the mandrel, a nut is rotationally arranged on the outer side of the other end of the mandrel, and an installation space is formed between the nut and the other end of the mandrel. The oil return seat to be welded is pre-positioned before welding, deformation generated during welding is reduced through limiting of the clamp, and the position degree of the oil return seat assembly is guaranteed through limiting of the pull rod, so that the position degree requirement of a drawing is guaranteed, the part tolerance requirement is met, manual operation is facilitated, and follow-up repeated repair is avoided.

Description

Technical Field

[0001] This utility model relates to a fixture for ensuring the welding dimensional tolerance of the rear sealing seat assembly, and belongs to the field of welding fixture technology. Background Technology

[0002] The dimensional accuracy of the rear sealing seat assembly is crucial to the overall performance and reliability of the equipment. Often, five oil return seats need to be welded to its outer wall to meet specific functional requirements. These oil return seats not only provide support and fixation but also directly affect the return and circulation efficiency of the oil inside the rear sealing seat assembly. Therefore, the welding position and dimensional accuracy between the rear sealing seat assembly and the oil return seats require extremely high precision.

[0003] However, in actual welding processes, the rear sealing seat assembly is prone to deformation due to the numerous and unevenly distributed welding points, the complex structure of the rear sealing seat assembly, the differences in the thermal expansion coefficients of the materials, and the influence of welding thermal stress. This deformation not only causes the dimensions of the welded rear sealing seat assembly to fail to meet design requirements, but also affects its overall performance and service life. Utility Model Content

[0004] To address the problems existing in the background art, this utility model provides a fixture that ensures the welding dimensional tolerances of the rear sealing seat assembly.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a fixture for ensuring the welding dimensional tolerance of the rear sealing seat assembly, comprising a base plate, a pull rod, a bracket, a pressure plate, a wedge block, and an oil return seat support mechanism; the middle part of the base plate is inserted and fixedly connected to the lower end of the vertically arranged pull rod, the outer side of the upper end of the pull rod is slidably fitted with a pressure plate, the upper end of the pressure plate is fitted with a wedge block, and the wedge block is inserted into the upper end of the pull rod; the upper end of the base plate is fixedly connected to the lower ends of four brackets, and each bracket is provided with an oil return seat support mechanism at its upper end.

[0006] Each of the oil return seat support mechanisms includes a bushing, a cylindrical pin, a spindle, a second wedge block, and a nut; the upper end of the bracket is fixed to the bushing by inserting the cylindrical pin, the bushing is inserted into one end of the spindle, the outer wall of the bushing is provided with a slot, the second wedge block is inserted into the slot, the wedge-shaped surface of the second wedge block is configured to cooperate with one end of the spindle, the outer side of the other end of the spindle is rotatably provided with a nut, and there is an installation space between the nut and the other end of the spindle.

[0007] An angular pin is fixedly provided at the upper end of the base plate.

[0008] Compared with the prior art, the beneficial effects of this utility model are:

[0009] This invention prepositions the oil return seat to be welded before welding, reduces the deformation caused during welding by using a fixture, and ensures the positional accuracy of the oil return seat assembly by using a pull rod, thereby ensuring the positional accuracy requirements of the drawing, meeting the part tolerance requirements, facilitating manual operation, and avoiding multiple rework in the future. Attached Figure Description

[0010] Figure 1 This is a top view of the present invention, in which the two oil return seat support mechanisms are not drawn for clarity.

[0011] Figure 2 yes Figure 1 AA section view;

[0012] Figure 3 yes Figure 1 BB cross-sectional view;

[0013] Figure 4 yes Figure 1 CC section view;

[0014] Figure 5 yes Figure 1 DD sectional view;

[0015] Figure 6 This is a schematic diagram of the oil return seat support mechanism. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0017] A fixture for ensuring the welding dimensional tolerance of a rear sealing seat assembly includes a base plate 1, a pull rod 3, a bracket 4, a pressure plate 7, a wedge block 8, and an oil return seat support mechanism. The middle part of the base plate 1 is fixedly connected to the lower end of the vertically arranged pull rod 3 by a connecting pin 2. The pressure plate 7 is slidably fitted on the outer side of the upper end of the pull rod 3. The upper end of the pressure plate 7 is fitted with a wedge block 8, which is inserted into the upper end of the pull rod 3. The upper end of the base plate 1 is fixedly connected to the lower end of four brackets 4 along its circumference. Each bracket 4 has an oil return seat support mechanism at its upper end.

[0018] Each of the aforementioned oil return seat support mechanisms includes a bushing 5, a cylindrical pin 6, a spindle 9, a second wedge block 10, and a nut 11. The upper end of the bracket 4 is fixed to the bushing 5 by inserting the cylindrical pin 6. The four brackets 4 have different shapes, and the specific shape is set according to the corresponding oil return seat installation requirements. The cylindrical pin 6 is used to restrict the bushing 5 and prevent the bushing 5 from moving. The bushing 5 is inserted into one end of the spindle 9. The outer wall of the bushing 5 has a slot that runs through it radially. The second wedge block 10 is inserted into the slot. The wedge-shaped surface of the second wedge block 10 is configured to cooperate with one end of the spindle 9. The other end of the spindle 9 has a nut 11 that is rotatably mounted on its outer side. There is an installation space between the nut 11 and the other end of the spindle 9. The installation space is used for the installation of the oil return seat.

[0019] An angular pin 20 is fixedly provided at the upper end of the base plate 1, and the angular pin 20 can limit the sealing seat assembly in an angular direction.

[0020] When using this utility model, the sealing seat assembly is fitted onto the outside of the pull rod 3 and then placed on the base plate 1. The base plate 1 provides radial limitation for the sealing seat assembly, and the angular pin 20 provides angular limitation for the sealing seat assembly. The sealing seat assembly is fixed to the base plate 1 by the pressure plate 7, and then the sealing seat assembly is fixed by the movable wedge block 8.

[0021] Insert one end of the oil return seat into the corresponding installation space, so that the external thread of the oil return seat is screwed into the internal thread of the corresponding nut 11. Then, push the mandrel 9 to pre-adjust the position of the oil return seat by the corresponding wedge block 10. Finally, adjust the oil return seat to the position required for welding by rotating the corresponding nut 11.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fixture for ensuring welding dimensional tolerances of a rear sealing seat assembly, characterized in that: The system includes a base plate (1), a tie rod (3), a bracket (4), a pressure plate (7), a wedge block (8), and a return oil seat support mechanism. The middle part of the base plate (1) is inserted and fixed to the lower end of the vertically arranged tie rod (3). The outer side of the upper end of the tie rod (3) is slidably fitted with a pressure plate (7). The upper end of the pressure plate (7) is fitted with a wedge block (8), which is inserted into the upper end of the tie rod (3). The upper end of the base plate (1) is fixedly connected to the lower end of four brackets (4). Each bracket (4) has a return oil seat support mechanism at its upper end. Each return oil seat support mechanism... The structure includes a bushing (5), a cylindrical pin (6), a spindle (9), a second wedge block (10), and a nut (11). The upper end of the bracket (4) is fixed to the bushing (5) by inserting the cylindrical pin (6). The bushing (5) is inserted into one end of the spindle (9). The outer wall of the bushing (5) is provided with a slot. The second wedge block (10) is inserted into the slot. The wedge surface of the second wedge block (10) is fitted with one end of the spindle (9). The nut (11) is rotatably provided on the outer side of the other end of the spindle (9). There is an installation space between the nut (11) and the other end of the spindle (9).

2. The fixture for ensuring welding dimensional tolerances of the rear sealing seat assembly according to claim 1, characterized in that: An angular pin (20) is fixedly provided at the upper end of the base plate (1).

Images