A device for machining chamfers of air cooler tube sheet orifice

Abstract

The utility model relates to air cooler heat exchanger equipment field, disclose a kind of for air cooler tube sheet orifice's processing chamfer device, device mainly includes cutter body, depth control mechanism, chamfering tool and inner hole guiding mechanism;Cutter body lower end is sequentially provided with positioning section, tool rest section and guide head;Depth control mechanism contains adjustable depth adjusting screw and depth control bearing, for accurately limiting chamfer depth;Inner hole guiding mechanism contains guide bearing, insert tube sheet hole for cutter body provides axial guidance, ensure that chamfer and hole are coaxial;When working, cutter body obtains power rotation by taper shank connection drilling machine main shaft, inner hole guiding mechanism inserts tube sheet hole and provides guidance, chamfering tool moves down in processing process;When depth adjusting screw contacts tube sheet upper surface, it reaches predetermined depth and completes processing;The utility model accurately and conveniently controls the amount of feed by depth control mechanism, guarantees depth consistency;Utilize inner hole guiding mechanism to ensure that processing coaxiality, significantly improve efficiency, quality and reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger equipment for air coolers, and in particular to a chamfering device for machining the orifices of air cooler tube sheets. Background Technology

[0002] Currently, the tube sheet holes of air coolers are machined using radial drilling machines. During the welding of the tube sheet and heat exchanger tubes, the diameter of the heat exchanger tubes and the chamfer dimensions of the tube sheet holes are clearly defined. Since most employees rely on personal experience, controlling the chamfer depth through observation and intuition, in actual machining, the chamfer depth of the tube sheet holes is too small, resulting in a small feed rate. The dial positioning method cannot meet the chamfering requirements, leading to inconsistent chamfer depths in batches, failing to meet design requirements, and resulting in low machining efficiency, which affects subsequent processing of the heat exchanger. In view of these reasons, a chamfering device for machining tube sheet holes in air coolers is proposed. Utility Model Content

[0003] The purpose of this invention is to overcome the problem of inconsistent chamfer depths in batch processing of tube sheet holes in air coolers due to the small chamfer depth and insufficient feed rate at the tube sheet hole openings, which makes the dial positioning method unsuitable for chamfering. This invention provides a chamfering device for processing tube sheet holes in air coolers through a reasonable design. The feed rate of the tool body is controlled by a depth control mechanism, which is convenient and quick to operate and allows for precise adjustment of the feed rate. The internal hole guiding mechanism guides the workpiece through the tube sheet hole, ensuring axial accuracy in the chamfering process, improving work efficiency, saving time and reducing costs, and enhancing the processing quality of the heat exchanger.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: A chamfering device for machining the bore of an air cooler tube sheet comprises: a tool body, a positioning section, a tool holder section, a guide head, a tool mounting hole, a depth control mechanism, a depth adjusting screw, a locking nut, a hole retaining ring, a depth control bearing, a shaft retaining ring, a chamfering tool, an inner hole guiding mechanism, a guide screw, a guide bearing, a flat washer, a spring washer, a tube sheet, and a tube sheet bore; a tool holder is provided at the upper end of the tool body, and an inner hole guiding mechanism is provided at the lower end of the tool body; the lower part of the tool body is divided into a positioning section, a tool holder section, and a guide head from top to bottom; a depth control mechanism is provided on the outside of the positioning section, and the depth control mechanism is used for controlling the depth of the chamfering tool's feed.

[0005] The tool holder section has a pre-reserved tool mounting hole in the transverse direction. A chamfering tool is installed in the tool mounting hole. The chamfering tool is set along the opening of the tube sheet hole and is used for chamfering along the edge of the tube sheet hole.

[0006] An inner hole guide mechanism is set on the outside of the guide head, and a tube sheet is set at the lower end of the inner hole guide mechanism; a tube sheet hole is reserved on the tube sheet, and an inner hole guide mechanism is set in the tube sheet hole. The inner hole guide mechanism is used to guide the front end of the cutter body to run along the axial direction of the tube sheet hole.

[0007] The lower part of the depth control mechanism is reserved as a bearing sleeve, in which a depth control bearing is installed. A retaining ring for the hole is set on the upper end of the outer sleeve of the depth control bearing, and a retaining ring for the shaft is set on the lower end of the inner sleeve of the depth control bearing. A pair of screw holes are symmetrically reserved on both sides of the depth control mechanism, and a depth adjustment screw is set in each of the two screw holes. The upper end of the depth adjustment screw is set as a nut, and the lower end of the depth adjustment screw is set as a lock nut.

[0008] The upper part of the inner hole guiding mechanism is reserved as a bearing sleeve, a guide bearing is set in the bearing sleeve, and a guide screw is set in the guide bearing. The bearing sleeve, guide bearing, and guide screw constitute the inner hole guiding mechanism. The lower end of the guide screw is set as a nut, and the upper end of the guide screw is set as a screw rod. A spring washer, a flat washer, and a guide bearing are set on the screw rod. A guide head is set in the guide bearing, and a screw hole is reserved in the center of the guide head. The screw rod is set in the screw hole. The guide head and the guide screw are used to fix the guide bearing.

[0009] Working principle: Before machining, a chamfering tool is installed on the tool body, an internal hole guide mechanism is installed at the front end of the tool body, and a depth control mechanism is installed on the tool body; the inner ring of the bearing of the depth control mechanism is fixed on the tool body, a chamfering depth adjustment support is installed on the outer ring of the bearing, and a depth adjustment screw is installed on the adjustment support. The chamfering depth of the hole is controlled by adjusting the depth adjustment screw.

[0010] During machining, the tapered shank at the tail of the cutter body is Morse taper and is connected to the radial drill spindle. The rotation of the radial drill spindle provides power to drive the cutter body and chamfering tool to rotate and machine the chamfer of the hole opening. The inner hole guide mechanism is inserted into the tube sheet hole and moves downward to ensure the coaxiality of the chamfer and the inner hole. During the downward movement of the cutter body, when the depth adjustment screw contacts the top of the tube sheet, the chamfering of the tube sheet hole is completed.

[0011] Beneficial effects: The feed rate of the tool body of this utility model adopts a depth control mechanism, which is convenient and quick to operate and can accurately adjust the feed rate of the tool body; the inner hole guiding mechanism guides the workpiece through the tube sheet hole, which can ensure the axial accuracy of the chamfering of the tube sheet hole, improve work efficiency, save time and reduce costs, and improve the processing quality of the heat exchanger. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the overall assembly structure;

[0014] Figure 2 yes Figure 1 A schematic diagram of the operational state structure;

[0015] Figure 3 yes Figure 1 A schematic diagram of a partial structure of the blade;

[0016] Figure 4 yes Figure 1 A schematic diagram of the decomposed structure;

[0017] Figure 1 , 2 In sections 3 and 4: Tool body 1, positioning section 1-1, tool holder section 1-2, guide head 1-3, tool mounting hole 1-4, depth control mechanism 2, depth adjustment screw 201, locking nut 202, hole retaining ring 203, depth control bearing 204, shaft retaining ring 205, chamfering tool 3, inner hole guiding mechanism 4, guide screw 401, guide bearing 402, flat washer 403, spring washer 404, tube sheet 5, tube sheet hole 5-1. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] The upper end of the cutter body 1 is provided with a tool holder, and the lower end of the cutter body 1 is provided with an inner hole guide mechanism 4. The lower part of the cutter body 1 is divided into sections from top to bottom as a positioning section 1-1, a tool holder section 1-2, and a guide head 1-3. A depth control mechanism 2 is provided on the outside of the positioning section 1-1. The depth control mechanism 2 is used to control the depth of the chamfering tool 3.

[0020] Tool holder section 1-2 has a transversely reserved tool mounting hole position 1-4. A chamfering tool 3 is set in the tool mounting hole position 1-4. The chamfering tool 3 is set along the opening of the tube sheet hole 5-1. The chamfering tool 3 is used for chamfering along the edge of the tube sheet hole 5-1.

[0021] An inner hole guide mechanism 4 is provided on the outer side of the guide head 1-3, and a tube sheet 5 is provided at the lower end of the inner hole guide mechanism 4; a tube sheet hole 5-1 is reserved on the tube sheet 5, and an inner hole guide mechanism 4 is provided in the tube sheet hole 5-1. The inner hole guide mechanism 4 is used to guide the front end of the cutter body 1 to run along the axial direction of the tube sheet hole 5-1.

[0022] The lower part of the depth control mechanism 2 is reserved as a bearing sleeve, and a depth control bearing 204 is installed in the bearing sleeve. A retaining ring 203 for holes is installed on the upper end of the outer sleeve of the depth control bearing 204, and a retaining ring 205 for shafts is installed on the lower end of the inner sleeve of the depth control bearing 204. A pair of screw holes are symmetrically reserved on both sides of the depth control mechanism 2. A depth adjustment screw 201 is installed in each of the two screw holes. The upper end of the depth adjustment screw 201 is set as a nut, and the lower end of the depth adjustment screw 201 is set as a lock nut 202.

[0023] The upper part of the inner hole guide mechanism 4 is reserved as a bearing sleeve, and a guide bearing 402 is set in the bearing sleeve. A guide screw 401 is set in the guide bearing 402. The bearing sleeve, the guide bearing 402, and the guide screw 401 constitute the inner hole guide mechanism 4. The lower end of the guide screw 401 is set as a nut, and the upper end of the guide screw 401 is set as a screw rod. A spring washer 404, a flat washer 403, and the guide bearing 402 are set on the screw rod. A guide head 1-3 is set in the guide bearing 402. A screw hole is reserved in the center of the guide head 1-3, and a screw rod is set in the screw hole. The guide head 1-3 and the guide screw 401 are used to fix the guide bearing 402.

Claims

1. A device for processing chamfer of air cooler tube sheet orifice, which is composed of cutter body (1), positioning section (1-1), cutter seat section (1-2), guide head (1-3), cutter mounting hole (1-4), depth control mechanism (2), depth adjustment screw (201), locking nut (202), hole retainer ring (203), depth control bearing (204), shaft retainer ring (205), chamfer cutter (3), inner hole guide mechanism (4), guide screw (401), guide bearing (402), flat washer (403), spring washer (404), tube sheet (5), tube sheet hole (5-1); the device is characterized in that: The upper end of the cutter body (1) is provided with a tool holder, and the lower end of the cutter body (1) is provided with an inner hole guide mechanism (4); the lower part of the cutter body (1) is divided into sections from top to bottom as a positioning section (1-1), a tool holder section (1-2), and a guide head (1-3); a depth control mechanism (2) is provided on the outside of the positioning section (1-1), and the depth control mechanism (2) is used for the depth control of the chamfering tool (3) infeed.

2. A chamfering device for machining tube sheet orifices of an air cooler according to claim 1; characterized in that: The tool holder section (1-2) has a horizontally reserved tool mounting hole (1-4). A chamfering tool (3) is set in the tool mounting hole (1-4). The chamfering tool (3) is set along the opening of the tube sheet hole (5-1). The chamfering tool (3) is used for chamfering along the edge of the tube sheet hole (5-1).

3. A chamfering device for machining tube sheet orifices in an air cooler according to claim 1; characterized in that: An inner hole guide mechanism (4) is provided on the outside of the guide head (1-3), and a tube sheet (5) is provided at the lower end of the inner hole guide mechanism (4); a tube sheet hole (5-1) is reserved on the tube sheet (5), and an inner hole guide mechanism (4) is provided in the tube sheet hole (5-1). The inner hole guide mechanism (4) is used to guide the front end of the cutter body (1) to run along the axial direction of the tube sheet hole (5-1).

4. A chamfering device for machining tube sheet orifices of an air cooler according to claim 1; characterized in that: The lower part of the depth control mechanism (2) is reserved as a bearing sleeve, and a depth control bearing (204) is set in the bearing sleeve. A retaining ring (203) for the hole is set on the upper end of the outer sleeve of the depth control bearing (204), and a retaining ring (205) for the shaft is set on the lower end of the inner sleeve of the depth control bearing (204). A pair of screw holes are reserved symmetrically on both sides of the depth control mechanism (2), and a depth adjustment screw (201) is set in the pair of screw holes respectively. The upper end of the depth adjustment screw (201) is set as a nut, and the lower end of the depth adjustment screw (201) is set as a lock nut (202).

5. A chamfering device for machining tube sheet orifices of an air cooler according to claim 1; characterized in that: The upper part of the inner hole guide mechanism (4) is reserved as a bearing sleeve, and a guide bearing (402) is set in the bearing sleeve. A guide screw (401) is set in the guide bearing (402). The bearing sleeve, the guide bearing (402), and the guide screw (401) constitute the inner hole guide mechanism (4). The lower end of the guide screw (401) is set as a nut, and the upper end of the guide screw (401) is set as a screw rod. A spring washer (404), a flat washer (403), and a guide bearing (402) are set on the screw rod. A guide head (1-3) is set in the guide bearing (402). A screw hole is reserved in the center of the guide head (1-3). A screw rod is set in the screw hole. The guide head (1-3) and the guide screw (401) are used to fix the guide bearing (402).

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