Telescopic supporting assembly for reducing boring cutter

Abstract

The telescopic supporting assembly comprises a supporting seat embedded in a cutter bar, a supporting head arranged on the supporting seat in a sleeving mode and a shell connected with the supporting seat through a fixing mechanism and used for limiting the supporting head, the supporting seat is of a T-shaped structure, and an oil groove I is formed in the extending end of the supporting seat; a guide column capable of extending into the oil groove I is arranged in the center of the supporting head; a preset gap is formed between the outer side wall of the supporting head and the inner side wall of the shell, so that an oil groove II is obtained; the oil groove I and the oil groove II are communicated with an external hydraulic unit through a hydraulic control oil way arranged in the cutter bar. According to the telescopic supporting assembly for the variable-diameter boring cutter, the telescopic state of the telescopic supporting assembly is controlled in a hydraulic mode, compared with the prior art, the supporting range of the telescopic supporting assembly can be achieved through adjustment of compressed oil, the supporting effect is stable, and workpieces with different heights can be supported.

Description

Technical Field

[0001] This utility model relates to the field of deep hole machining. More specifically, this utility model relates to a telescopic support assembly for a variable diameter boring tool used for machining deep holes or large diameter holes. Background Technology

[0002] In current hole machining or deep hole machining, some holes require high machining accuracy and surface quality, while others often become a major challenge in production due to the poor machinability of the workpiece material. Therefore, to ensure smooth hole and deep hole machining and achieve the required machining quality, a guide support device is added to the outside of the tool. However, this device is generally designed to be fixed. When machining some special cavities (such as bullet-shaped structures or bottle-shaped internal holes), the fixed support device may either be able to pass through the hole but not support the tool body, or it may be able to support the tool but not pass through the hole. Therefore, in deep hole machining, the inability of the support device to function will inevitably affect the machining effect of the tool.

[0003] Of course, some technologies solve this problem by setting a matching telescopic support mechanism on the tool holder. For example, the prior art with patent application number 202110971698.1, entitled "Modular Boring Tool," uses a sulfide body, an expansion body, a support component, and rollers to flexibly support the boring tool during drilling operations. This allows for smoother and more stable relative rotation between the boring tool and the hole wall. However, because the sulfide body is elastic and can undergo elastic deformation, in practical applications, the operator adjusts the direction and degree of deformation of the sulfide body to... The support performance of each support component is adjusted. When the vulcanized body is compressed due to increased axial pressure, it diffuses radially outward, thus providing stronger support to the inner wall of the accommodating cavity. When the vulcanized body is stretched due to decreased axial pressure, it contracts radially inward, thus weakening its support to the inner wall of the first accommodating cavity. However, the support obtained through this structure is a fixed support. Although the support pressure can be adjusted to achieve flexible support, it cannot change with the aperture for the same support module, that is, it cannot achieve variable diameter support. Utility Model Content

[0004] One object of this invention is to solve the above-mentioned problems and / or defects, and to provide the advantages that will be described later.

[0005] To achieve these objectives and other advantages of this utility model, a telescopic support assembly for a variable diameter boring tool is provided, including a support base embedded inside the tool holder and a support head sleeved on the support base, a housing connected to the support base by a fixing mechanism, and a housing that limits the support head. The support base has a T-shaped structure and an oil groove I is provided in its extended end.

[0006] A guide post that can extend into the oil tank I is provided at the center of the support head;

[0007] The outer side wall of the support head and the inner side wall of the outer shell have a predetermined gap to form the oil groove II, and the support head has a stepped end face that is convex at one end near the support seat and is in clearance fit with the gap of the inner side wall of the outer shell.

[0008] The oil tanks I and II are connected to an external hydraulic unit via a hydraulic control circuit located inside the cutter bar.

[0009] Preferably, a bullseye ball bearing is provided at the top center of the support head.

[0010] Preferably, the top of the support head is provided with multiple wrench holes.

[0011] Preferably, the outer casing is provided with threads that mate with the module slots on the tool holder.

[0012] The present invention has at least the following beneficial effects: First, the present invention provides a telescopic support component applied to a variable diameter boring tool, which uses hydraulic means to control its telescopic state. Compared with the existing technology, its support range can be achieved by adjusting the compressed oil, and the support effect is stable and can support workpieces of different heights.

[0013] Specifically, the extension amount of the support in this invention changes dynamically with the diameter of the hole in the workpiece. If the hole diameter increases, the support extends further, requiring more hydraulic oil to enter, eventually reaching the set pressure value. Maintaining a constant pressure value ensures the stability of the support. In practical applications, the pressure value can be adjusted to better suit the workpiece's hardness and wall thickness. Generally, a higher pressure value results in greater support force and the ability to withstand greater cutting forces. The support force can be adjusted slightly to achieve better support performance based on actual application needs.

[0014] Secondly, the telescopic support assembly of this utility model adopts a modular design. Only the corresponding installation interface of the telescopic support assembly needs to be machined on the tool holder for installation and use.

[0015] Thirdly, the telescopic support component of this utility model is controlled by a hydraulic system. The telescopic support component can be controlled to extend and retract simply by switching the hydraulic pressure on and off, without any extra complicated operations in between.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a telescopic support assembly for a variable diameter boring tool, as shown in one embodiment of the present invention.

[0018] Figure 2 This is a side view of the telescopic support assembly for a variable diameter boring tool in one embodiment of the present invention.

[0019] Figure 3 This is a top view of the telescopic support assembly for a variable diameter boring tool in one embodiment of the present invention.

[0020] Figure 4 This is a cross-sectional view of the telescopic support assembly in the extended state, as shown in one embodiment of the present invention.

[0021] Figure 5 This is a side view of the telescopic support assembly in the extended state, as shown in one embodiment of the present invention.

[0022] Figure 6 This is an exploded structural diagram of the telescopic support assembly;

[0023] Figure 7 This is a schematic diagram of the telescopic support assembly in the extended state when switched to its extended state under the action of hydraulic oil, as shown in one embodiment of the present invention.

[0024] Figure 8 This is a diagram showing the tool holder with a set of telescopic support components fully extended.

[0025] Figure 9 This is a schematic diagram of the telescopic support assembly in a retracted state when switched to a retracted state under the action of hydraulic oil, as shown in one embodiment of the present invention.

[0026] Figure 10 This is a diagram showing the state of the tool holder after a set of telescopic support components has been retracted. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0028] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0029] It should be noted that in the description of this utility model, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0031] Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] Example 1

[0033] A telescopic support assembly for a variable diameter boring tool, the structure of which is as follows: Figures 1-6 As shown, it includes a support base 1 embedded inside the tool holder and a support head 2 sleeved on the support base 1, a housing 3 connected to the support base 1 by a fixing mechanism (i.e., a connecting screw 9) and limiting the support head 2. The support base 1 has a T-shaped structure and an oil groove I 7 is provided in its extended end.

[0034] The support head 2 is provided with a guide post 4 that can extend into the oil tank I at its center;

[0035] The outer side wall of the support head 1 and the inner side wall of the outer shell 3 have a predetermined gap to form an oil groove II 8. The support head 2 has a stepped end face 11 that is outwardly protruding at one end near the support base 1 and is in clearance fit with the gap of the inner side wall of the outer shell. In actual application, various O-rings 6 are provided between the structures to ensure their sealing performance.

[0036] The oil grooves I7 and II4 are connected to an external hydraulic unit (not shown) through a hydraulic control oil circuit (not shown) inside the tool holder. The support head is controlled by hydraulic means to ensure that its control accuracy and stability meet the usage requirements.

[0037] A bullseye ball bearing 5 is provided at the top center of the support head. The support head is supported by the ball bearing, which can effectively prevent scratching the inner hole wall.

[0038] Working principle: Assemble all components according to... Figure 6 Assemble the components in the order indicated by the arrows to complete the assembly. The module assembly process is simple: first, place the various sealing rings into the corresponding grooves, then assemble the accessory support base 1, support head 2, and outer shell 3 together in sequence and connect them with screws. Finally, insert the guide post 4 from the bottom of the support base 1 to complete the installation of the entire module. When using it, simply screw the telescopic support assembly into the module slot reserved by the tool. The entire telescopic support assembly structure is simple to assemble and easy to maintain.

[0039] like Figures 7-8 As shown, in practical applications, when the telescopic support assembly extends, hydraulic oil needs to be controlled from the hydraulic station to enter the oil tank I7, thereby providing power to the guide column 4. The guide column 4 then controls the support head 2 to extend to the position that needs support. At the same time, when the support head 2 extends, the hydraulic oil in the oil tank II8 will flow back to the hydraulic station, leaving space for the support head 2 to extend. Throughout the process, the support height of a single telescopic support assembly can be flexibly changed according to the workpiece, and its support range can be increased or decreased as needed.

[0040] like Figures 9-10 As shown, in practical applications, when the telescopic support assembly retracts, hydraulic oil needs to be controlled from the hydraulic station to enter the oil tank Ⅱ8. At this time, the hydraulic oil will act on the stepped end face on the circumference of the support head 2, thereby controlling the retraction of the support head 2. At the same time, when the support head 2 retracts, the hydraulic oil in the retraction hydraulic chamber 7 will flow back to the hydraulic station, leaving space for the support head 2 to retract.

[0041] In this design, the telescopic support assembly functions as follows: The support head 2, under hydraulic pressure, adheres and presses against the hole wall with a fixed pressure to resist vibrations generated during tool cutting. The hydraulic unit ensures a constant supporting pressure between the support head and the hole wall and can float freely as the inner hole shape changes. The hydraulic support is stable and provides significant support force, effectively guaranteeing machining accuracy, and it can float freely as the inner hole shape changes.

[0042] Example 2

[0043] This second embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1-2 As shown, it discloses the following improvements based on implementation method 1:

[0044] The top of the support head is provided with multiple wrench holes 10.

[0045] Working principle: Its function is to enable the telescopic support assembly to be quickly engaged with the cutting tool when it is installed, that is, the wrench and the wrench holes are matched to install the telescopic support assembly on the cutting tool.

[0046] Example 3

[0047] This third embodiment, as a preferred embodiment of the present invention, discloses the following improvements based on embodiment 1:

[0048] The outer casing is provided with a thread 12 that mates with the module slot on the tool holder.

[0049] Working principle: When a support mechanism is needed for the cutting tool during machining, simply select the appropriate size telescopic support assembly, and then pre-reserve the corresponding screw-in mounting slot on the cutting tool according to the interface of the telescopic support assembly. Furthermore, leveraging the modularity of the support mechanism, the number of modules can be freely selected according to machining requirements (i.e., multiple sets can be set on a single tool holder, with multiple sets at the same diameter in each set; for example, two sets of hydraulic support seats can be equipped on the tool holder, with each set of support seats extending and retracting synchronously controlled by an external hydraulic unit). Multiple support holes at the same diameter can extend and retract simultaneously, providing excellent support for workpieces with various inner diameters (i.e., machining irregularly shaped holes), making the machining process more stable.

[0050] The above solutions are merely illustrative examples of preferred embodiments, but are not limited thereto. When implementing this invention, appropriate substitutions and / or modifications can be made according to the user's needs.

[0051] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0052] Although embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. A telescopic support assembly for a variable diameter boring tool, comprising a support seat embedded in the interior of a tool bar and a support head sleeved on the support seat, the support head being connected to the support seat by a fixing mechanism, and a limiting shell for the support head, characterized in that, The support base is T-shaped structure, and an oil groove I is arranged in the extension end of the support base; A guide column which can extend into the oil groove I is arranged at the center of the support head; The outer side wall of the support head and the inner side wall of the shell have a predetermined gap to form an oil groove II, and the support head is provided with a stepped end surface which is in gap cooperation with the gap between the outer side wall of the support head and the inner side wall of the shell in the form of outward protrusion at one end close to the support base; The oil groove I and the oil groove II are communicated with the hydraulic unit outside through the hydraulic control oil circuit arranged inside the cutter bar.

2. The telescopic support assembly for a variable diameter boring tool of claim 1, wherein, A bull eye ball is arranged at the center of the top of the support head.

3. The telescopic support assembly for a variable diameter boring tool of claim 1, wherein, A plurality of wrench holes are arranged on the top of the support head.

4. The telescopic support assembly for a variable diameter boring tool of claim 1, wherein, A screw thread which is matched with the module groove on the cutter bar is arranged on the shell.

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