A drilling tool for end cover

Abstract

The utility model discloses a kind of end cap drilling tool, including workbench and the base vertically arranged on it, and the base is vertical board structure. Tool body is rotatably connected on base by plane bearing, and its circumferential uniformity has multiple positioning lugs, and the edge of lug is vertically provided with the drill jig plate with guide hole. Positioning lug is equipped with positioning protrusion and positioning hole, and realizes circumferential positioning with end cap back structure cooperation. The center of tool body is equipped with pillar, and end cap is compressed by pressing plate and tightening device. The tool structure is stable and compact, realizes the clamping of end cap once, index drilling, with the advantages of accurate positioning, easy operation, high processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, specifically to a tooling for drilling holes in end caps. Background Technology

[0002] In the field of mechanical manufacturing, end cap parts typically require multiple evenly distributed connection holes to be machined on their circumferential flange surface. Currently, the common machining method is to use general-purpose jigs (such as flat-jaw pliers or three-jaw chucks) to clamp the outer circle or end face of the end cap, and then align it by scribing or use ordinary drill jigs to drill the holes one by one.

[0003] The aforementioned existing technology has the following drawbacks: First, for end caps with multiple circumferential holes, the workpiece needs to be loosened and repositioned after each hole is machined, which is cumbersome and inefficient. Second, relying on manual scribing for alignment makes it difficult to guarantee positioning accuracy, easily leading to cumulative errors and uneven hole distribution, thus affecting assembly quality. Finally, general-purpose fixtures are poorly adaptable to end caps with special positioning structures, such as asymmetrical positioning holes / protruding structures, resulting in unstable clamping.

[0004] Therefore, there is an urgent need for a special tooling that can achieve rapid and accurate positioning and support efficient indexing drilling. Summary of the Invention

[0005] The purpose of this utility model is to overcome the above-mentioned defects of the prior art and provide a simple, accurate, and efficient end cap drilling fixture to achieve rapid and precise processing of multiple holes in the circumferential direction of the end cap.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an end cap drilling fixture, comprising a worktable and a base disposed on the worktable, the base being disposed perpendicular to the worktable to form a vertical plate structure; further comprising a fixture body, the fixture body being rotatably connected to the base via a planar bearing; four positioning lugs are evenly distributed around the circumference of the fixture body, and a drilling template is vertically disposed on the edge of the positioning lugs, the drilling template having a guide hole for the drill bit to pass through; the positioning lugs are provided with positioning components for cooperating with corresponding structures on the end cap to achieve circumferential positioning; a support column for supporting the end cap is disposed at the center of the fixture body, and a clamping device for pressing the end cap tightly against the fixture body is disposed above the support column.

[0007] Preferably, the positioning component includes a positioning protrusion disposed on one of the positioning lugs and positioning holes disposed on the other positioning lugs, the positioning protrusion and positioning holes being used for positioning engagement with corresponding holes and protrusions on the end cap.

[0008] Preferably, the clamping device includes a pressure plate detachably connected to the top of the support column and a tightening device for driving the pressure plate to clamp or loosen.

[0009] Compared with existing technologies, the beneficial effects of this invention are as follows: 1. Precise positioning and simple operation: By utilizing the end cap's own structure (holes, bosses) and the positioning protrusions and holes on the tooling, rapid and precise positioning is achieved, effectively ensuring the consistency of the machined hole positions. 2. High processing efficiency: The main body of the tooling is rotatable, and with multiple circumferentially distributed drilling templates, it achieves one-time clamping and indexing drilling of multiple holes on the end cap. This eliminates repeated loading, unloading, and alignment steps, significantly improving processing efficiency. 3. Simple and reasonable overall structure and low manufacturing cost: The central clamping method is stable and reliable, and the manual rotation indexing operation is easy, reducing labor intensity and the technical requirements for operators. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the end cap drilling fixture of this utility model.

[0011] Figure 2 This is a schematic diagram of the end cap structure of this utility model.

[0012] The markings in the diagram are: 1-workbench, 2-base, 3-tool body, 4-positioning lug, 5-drill template, 6-positioning protrusion, 7-positioning hole, 8-pressure plate, 9-tightening device, 10-end cap, 11-drilling position. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0014] like Figure 1 and Figure 2 As shown, the end cap drilling fixture provided by this utility model mainly includes a workbench 1, a base 2, a fixture body 3, a positioning lug 4, a drilling template 5, a pressure plate 8, and a tightening device 9.

[0015] The worktable 1 serves as a horizontal mounting base. The base 2 is perpendicular to the worktable 1 and is fixed by welding or bolts to form a stable vertical plate. This vertical plate structure makes the overall center of gravity of the fixture more stable and provides a vertical mounting plane for subsequent components. The fixture body 3 is rotatably connected to the base 2 via a thrust ball bearing. This thrust ball bearing allows the fixture body 3 to rotate easily and smoothly relative to the base 2, while also withstanding the axial pressure generated during drilling.

[0016] Four radially extending positioning lugs 4 are evenly distributed around the circumference of the fixture body 3. A drill template 5 is vertically fixed to the edge of each positioning lug 4. Guide holes (corresponding to…) are precisely machined on the drill template 5. Figure 2 The drilling position 11 is used to guide the drill bit and ensure the positional accuracy and verticality of the drilling.

[0017] To achieve precise angular positioning of the end cap 10 on the tooling, a positioning protrusion 6 is machined on one positioning lug 4, and positioning holes 7 are machined on the other three positioning lugs 4. The positions of the positioning protrusion 6 and the positioning holes 7 correspond one-to-one with the positions of the inherent process holes or bosses on the back of the flange of the end cap 10 to be processed. During clamping, the holes on the back of the end cap 10 are fitted onto the positioning protrusion 6, and at the same time, the bosses on the end cap fall into the corresponding positioning holes 7, thus achieving rapid and precise circumferential positioning of the end cap 10 without the need for alignment.

[0018] The main body 3 of the tooling has a support column at its center, which supports the center part of the end cap 10 from below. The top of the support column is connected to a pressure plate 8, and a bolt can be screwed downward by a tightening device 9, thereby firmly pressing the end cap 10 onto the shoulder of the support column and completing the axial fixation.

[0019] During operation, with the back of the end cap 10 facing the fixture body 3, align the positioning holes on it with the positioning protrusions 6 on the fixture and lower it, allowing the protrusions on the end cap to fall into the corresponding positioning holes 7, achieving circumferential positioning. Then, place the pressure plate 8 and tighten it with the tightening device 9 (bolts) to press the end cap 10 firmly. When drilling begins, the drill bit passes through the guide hole of the drill template 5 on the first positioning lug 4 to machine the first hole on the end cap 10. After completion, manually rotate the fixture body 3 until the drill template 5 on the next positioning lug 4 aligns with the drill bit. Since the fixture body 3 can rotate easily and the end cap 10 is completely fixed to the body, the rotation process is the indexing process, eliminating the need to reposition the workpiece. Repeating this process allows for the rapid and accurate machining of all holes in the circumferential direction of the end cap.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tooling for drilling holes in end caps, characterized in that: The device includes a workbench (1) and a base (2) mounted on the workbench (1). The base (2) is perpendicular to the workbench (1) and forms a vertical plate structure. It also includes a tooling body (3), which is rotatably connected to the base (2) via a planar bearing. Four positioning lugs (4) are evenly distributed around the circumference of the tooling body (3). A drill template (5) is vertically mounted on the edge of each positioning lug (4), and the drill template (5) has a guide hole for the drill bit to pass through. The positioning lugs (4) are provided with a guide hole for connecting to the end cap. (10) The corresponding structure on the positioning component is matched to achieve circumferential positioning; the center of the tooling body (3) is provided with a support column for supporting the end cap (10), and a clamping device is provided above the support column for pressing the end cap (10) against the tooling body (3). The positioning component includes a positioning protrusion (6) on one of the positioning lugs (4) and a positioning hole (7) on the other positioning lugs (4). The positioning protrusion (6) and the positioning hole (7) are used to position and cooperate with the corresponding hole and protrusion on the end cap (10).

2. The end cap drilling fixture according to claim 1, characterized in that: The clamping device includes a pressure plate (8) detachably connected to the top of the support column and a tightening device (9) for driving the pressure plate (8) to clamp or loosen.

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