An adjustable clamp for drilling holes in a heat exchanger

Abstract

This utility model belongs to the field of fixture technology, and in particular to an adjustable fixture for drilling heat exchangers. It includes a worktable with mounting plates at the four corners of its top. A fixture body is mounted on the top of each mounting plate, and the fixture body is used to clamp the workpiece. Multiple positioning holes are arranged on the top of the worktable, and locking nuts are installed at the bottom of the mounting plates. By setting mounting plates at the four corners of the worktable top, and by having the locking nuts at the bottom of the mounting plates cooperate with the positioning holes on the top of the worktable and the bottom insert rods, this utility model allows the fixture body to be flexibly adjusted on the worktable according to the specific size, shape, and drilling position requirements of the heat exchanger workpiece. This design breaks the limitations of traditional fixtures with fixed positions. Whether it is small-area precision drilling of small heat exchanger workpieces or multi-position drilling of large workpieces, adaptation can be achieved by simply adjusting the position of the mounting plates.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to an adjustable clamp for drilling heat exchangers. Background Technology

[0002] In the heat exchanger manufacturing and related processing industries, drilling is a crucial and frequently performed process. Heat exchangers, as key components of heat exchange equipment, exhibit diverse structures and large size ranges, with drilling locations often distributed across different areas of the workpiece according to varying design requirements. Furthermore, different heat exchanger workpieces utilize different materials, some with fragile surfaces that are highly sensitive to clamping forces during processing. However, existing heat exchanger drilling fixtures generally suffer from several significant drawbacks. Firstly, traditional fixtures are typically fixed in position, lacking flexibility. When faced with heat exchanger workpieces of varying sizes, shapes, and drilling locations, these fixed fixtures cannot meet diverse processing needs. For instance, when drilling multiple locations on irregularly shaped heat exchanger workpieces, the inability to adjust the fixture position forces operators to frequently re-clamp the workpiece, sometimes even requiring the replacement of fixtures of different specifications. This not only significantly reduces production efficiency and increases labor and time costs but may also introduce positioning errors due to repeated clamping, affecting drilling accuracy and quality. On the other hand, existing fixtures struggle to achieve stable and uniform clamping force control during the clamping process. Many fixtures suffer from uneven clamping force distribution due to uneven force distribution, causing the clamping plates to deflect or tilt. For heat exchanger workpieces with fragile surfaces or high surface quality requirements, this uneven clamping force can easily cause indentations, deformation, or even damage to the workpiece surface. For example, when drilling holes in heat exchanger workpieces made of thin-walled materials, the inability of the fixture to effectively buffer the clamping force can lead to localized pressure concentration, potentially causing cracks at areas with uneven wall thickness. This severely affects the workpiece's performance and overall quality, increases the scrap rate, and results in unnecessary economic losses for the company. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes an adjustable clamp for drilling heat exchangers, which more accurately solves the problems mentioned in the background art.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model proposes an adjustable fixture for drilling heat exchangers, including a worktable. Mounting plates are arranged at the four corners of the top of the worktable. A fixture body is mounted on the top of the mounting plates, and the fixture body is used to clamp the workpiece. Multiple positioning holes are arranged on the top of the worktable. A locking nut is installed at the bottom of the mounting plates, and the locking nut is used to limit the position of the mounting plates after being inserted into the positioning holes. A insertion rod is provided at the bottom of the worktable, and the insertion rod is threadedly connected to the locking nut.

[0006] Preferably, the fixture body includes a fixing plate mounted on the top of the mounting plate, a threaded ring is mounted on the side of the fixing plate, a screw is threadedly connected to the inner wall of the threaded ring, and a clamping plate is rotatably connected to the end of the screw via a bearing. The clamping plate is used to clamp the workpiece.

[0007] Preferably, a positioning rod is installed on the side of the clamping plate, and the positioning rod is connected through the fixing plate.

[0008] Preferably, the clamping plate is provided with an elastic pad on the other side of the positioning rod, and the elastic pad is used to elastically clamp the workpiece.

[0009] Preferably, a suspension plate is installed on the top of the elastic pad, and a positioning seat is installed on the side of the clamping plate. The suspension plate is inserted into the positioning seat to limit the movement of the elastic pad.

[0010] Preferably, a fixing nut is installed on the side of the positioning seat, and a fixing bolt is threaded to the inner wall of the fixing nut. The fixing bolt passes through the positioning seat and the suspension plate and is inserted into the clamping plate.

[0011] Compared with the prior art, this utility model provides an adjustable clamp for drilling heat exchangers, which has the following advantages:

[0012] This adjustable fixture for drilling heat exchangers features mounting plates at the four corners of the worktable. The locking nuts at the bottom of these plates engage with positioning holes on the top of the worktable and insert rods at the bottom. This allows the fixture body to be flexibly adjusted in position on the worktable according to the specific size, shape, and drilling location requirements of the heat exchanger workpiece. This design breaks the limitations of traditional fixed-position fixtures, enabling adaptation to both small-area precision drilling of small heat exchanger workpieces and multi-position drilling operations on large workpieces through simple adjustments to the mounting plate positions.

[0013] The adjustable clamping fixture used for drilling the heat exchanger employs a screw and threaded ring to move the clamping plate for clamping. Simultaneously, a positioning rod ensures the stability of the clamping plate's movement, preventing deflection or tilting, allowing the clamping plate to apply a uniform and stable clamping force to the heat exchanger workpiece. Furthermore, the elastic pads on the clamping plate play a crucial role in buffering and protecting the workpiece during clamping. The elastic properties of these pads can adaptively adjust according to the workpiece's surface shape and material, providing sufficient clamping force while preventing indentations, deformation, or even damage to the workpiece surface due to excessive clamping force. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an adjustable clamp for drilling heat exchangers according to the present invention.

[0015] Figure 2 This is a partial front view of the structure of an adjustable clamp for drilling heat exchangers according to the present invention.

[0016] Figure 3 This is a schematic diagram of the main structure of an adjustable clamp for drilling heat exchangers according to the present invention.

[0017] Figure 4 This utility model proposes an adjustable clamp for drilling holes in heat exchangers. Figure 3 Enlarged schematic diagram of region A in the middle.

[0018] In the diagram: 1. Workbench; 2. Mounting plate; 3. Positioning hole; 4. Locking nut; 5. Insert rod; 6. Fixture body; 61. Fixing plate; 62. Threaded ring; 63. Screw; 64. Clamping plate; 65. Positioning rod; 7. Elastic pad; 8. Suspension plate; 9. Positioning seat; 91. Fixing nut; 92. Fixing bolt. Detailed Implementation

[0019] To more clearly and completely illustrate the technical solution of this utility model, the following description, in conjunction with the accompanying drawings, will further explain this utility model. Example

[0020] like Figures 1-4As shown in the figure, an adjustable clamp for drilling heat exchangers according to one embodiment of this utility model includes a worktable 1, which is a rectangular metal table with a mounting plate 2 welded to each of the four corners of its top. The mounting plate 2 is a square metal plate, and a clamp body 6 is fixedly mounted on its top by bolts. The clamp body 6 is used to clamp the heat exchanger workpiece. The top of the worktable 1 has multiple circular positioning holes 3 arranged in a grid pattern. The diameter of the positioning holes 3 is 10mm and the depth is 15mm. A locking nut 4 is welded to the center of the bottom of the mounting plate 2. The outer diameter of the locking nut 4 is 12mm, and the inner diameter matches the positioning holes 3. After being inserted into the positioning holes 3, the outer wall of the locking nut 4 is made to make tight contact with the inner wall of the positioning hole 3 by rotating it, thereby limiting the position of the mounting plate 2. A rod 5 is welded to each of the four corners of the bottom of the workbench 1. The outer diameter of the rod 5 matches the inner diameter of the locking nut 4, and it has a thread that matches the locking nut 4. The rod 5 is threaded to the locking nut 4 to further fix the relative position of the workbench 1 and the mounting plate 2. Through the above design, the fixture can flexibly adjust the position of the mounting plate 2 on the workbench 1 according to the size of the heat exchanger workpiece and the drilling position. Through the cooperation of the locking nut 4 and the rod 5, the stability of the fixture body 6 during the working process is ensured, thereby meeting the drilling requirements of different heat exchanger workpieces.

[0021] In this invention, the fixture body 6 includes a fixing plate 61 welded to the top of the mounting plate 2. The fixing plate 61 is a rectangular metal plate. A threaded ring 62 is welded to the side of the fixing plate 61, and the inner wall of the threaded ring 62 is machined with threads that match those of the screw 63. The screw 63 is a metal rod with external threads, and its end is rotatably connected to a clamping plate 64 via a bearing. The clamping plate 64 is a rectangular metal plate used to clamp the heat exchanger workpiece. When the screw 63 is rotated, due to the fixing effect of the threaded ring 62, the screw 63 will move along its axial direction, thereby driving the clamping plate 64 to clamp or release the workpiece. By rotating the screw 63, the clamping force of the clamping plate 64 on the heat exchanger workpiece can be precisely controlled, ensuring the stability of the workpiece during the drilling process, while avoiding damage to the workpiece due to excessive clamping force.

[0022] In this invention, two positioning rods 65 are welded to the side of the clamping plate 64. The positioning rods 65 are cylindrical metal rods that are connected through the fixing plate 61. Two circular holes are opened on the fixing plate 61 corresponding to the positions of the positioning rods 65. The positioning rods 65 pass through these two circular holes and slide freely within them. The design of the positioning rods 65 ensures the stability of the clamping plate 64 during movement, preventing it from deflecting or tilting due to uneven force, thereby improving the clamping accuracy and stability of the fixture.

[0023] In this utility model, the clamping plate 64 is located on the other side of the positioning rod 65 and an elastic pad 7 is glued on it. The elastic pad 7 is made of rubber and is used to elastically clamp the heat exchanger workpiece. The design of the elastic pad 7 can provide a certain buffering effect when clamping the workpiece, avoid damage to the workpiece due to direct contact with the metal clamping plate, and improve the stability and reliability of clamping.

[0024] In this invention, a hanging plate 8, which is a rectangular metal plate, is glued to the top of the elastic pad 7. A positioning seat 9, a U-shaped metal frame, is welded to the side of the clamping plate 64, with its opening facing the hanging plate 8. When the hanging plate 8 is inserted into the positioning seat 9, the positioning seat 9 limits the elastic pad 7, preventing it from falling off or shifting during use. The cooperation between the hanging plate 8 and the positioning seat 9 ensures the stability of the elastic pad 7 during clamping, improving the overall performance and reliability of the clamp.

[0025] In this invention, a fixing nut 91 is welded to the side of the positioning seat 9. The inner wall of the fixing nut 91 is machined with threads that match those of the fixing bolt 92. The fixing bolt 92 is a metal rod with external threads that passes through the positioning seat 9 and the suspension plate 8 and is inserted into a pre-drilled threaded hole in the clamping plate 64. By rotating the fixing bolt 92, it is tightly connected to the fixing nut 91 and the threaded hole in the clamping plate 64, thereby further fixing the position of the suspension plate 8 and the elastic pad 7. Through the cooperation of the fixing bolt 92 and the fixing nut 91, the stability of the suspension plate 8 and the elastic pad 7 during the clamping process is ensured, preventing them from loosening or falling off due to force, thereby improving the clamping accuracy and stability of the fixture.

[0026] Finally, it should be noted that the basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification, and therefore, such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this specification. Furthermore, this specification uses specific terms to describe embodiments of this specification. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined. Moreover, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods of this specification.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjustable clamp for heat exchanger drilling, comprising a worktable (1), characterized in that, The top of the workbench (1) is provided with mounting plates (2) at four corners. The top of the mounting plates (2) is provided with a clamp body (6). The clamp body (6) is used to clamp the workpiece. The top of the workbench (1) is provided with multiple positioning holes (3). The bottom of the mounting plates (2) is provided with locking nuts (4). The locking nuts (4) are used to limit the position of the mounting plates (2) after being inserted into the positioning holes (3). The bottom of the workbench (1) is provided with a plug rod (5). The plug rod (5) is threadedly connected to the locking nut (4).

2. The adjustable clamp for heat exchanger drilling according to claim 1, wherein The fixture body (6) includes a fixing plate (61) mounted on the top of the mounting plate (2). A threaded ring (62) is mounted on the side of the fixing plate (61). A screw (63) is threadedly connected to the inner wall of the threaded ring (62). A clamping plate (64) is rotatably connected to the end of the screw (63) through a bearing. The clamping plate (64) is used to clamp the workpiece.

3. The adjustable clamp for heat exchanger drilling according to claim 2, wherein A positioning rod (65) is installed on the side of the clamping plate (64), and the positioning rod (65) is connected through the fixing plate (61).

4. The adjustable clamp for drilling a heat exchanger according to claim 3, wherein The clamping plate (64) is provided with an elastic pad (7) on the other side of the positioning rod (65), and the elastic pad (7) is used to elastically clamp the workpiece.

5. The adjustable clamp for heat exchanger drilling according to claim 4, wherein A suspension plate (8) is installed on the top of the elastic pad (7), and a positioning seat (9) is installed on the side of the clamping plate (64). The suspension plate (8) is inserted into the positioning seat (9) to limit the elastic pad (7).

6. The adjustable clamp for heat exchanger drilling according to claim 5, wherein A fixing nut (91) is installed on the side of the positioning seat (9), and a fixing bolt (92) is threaded on the inner wall of the fixing nut (91). The fixing bolt (92) passes through the positioning seat (9) and the suspension plate (8) and is inserted into the clamping plate (64).

Images