Deep hole machining device

Abstract

The utility model relates to a deep hole processing device which comprises an extending boring rod, an annular support frame and a lubricating system, the extending boring rod penetrates through the annular support frame to be installed, and the lubricating system is connected with the annular support frame. According to the technical scheme, extension of an existing machine tool is achieved, the problem that a high-precision deep hole cannot be machined in the prior art is solved, and the machine tool has the advantages of being simple in structure, convenient to operate and high in machining precision.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a large-diameter and high-precision deep-hole machining device for a compressor cylinder. Background Art

[0002] The compressor cylinder is mainly used for assembling a piston and supporting the reciprocating motion of the piston. Its inner cavity structure is composed of 3-4 sections of large-diameter and high-precision inner holes. The deepest part is more than 2500 mm away from the end face, and the straightness is less than 0.06 mm, and the surface roughness is less than Ra1.6. At present, the maximum depth that a general boring and milling machine can process is 1600 mm. When the machining depth is greater than 1000 mm, the straightness of such equipment is greater than 0.1 mm, and both the stroke and precision cannot meet the machining requirements of high-precision deep holes of a series of products such as compressor cylinders. In the prior art, to solve the problem of high-precision deep-hole machining, the product is usually divided into two sections, processed separately and then assembled into a component, which not only increases the cost but also reduces the product precision. Content of the Utility Model

[0003] Based on the above problems, the utility model provides a deep-hole machining device, which effectively solves the problem that high-precision deep holes cannot be machined, and has the advantages of simple structure, convenient operation and high machining precision.

[0004] A deep-hole machining device includes: an extended boring bar, an annular support frame and a lubrication system. The extended boring bar is installed through the annular support frame, and the lubrication system is connected to the annular support frame.

[0005] In one embodiment, the extended boring bar includes a coupling, a boring bar and a boring tool. The coupling and the boring tool are respectively arranged at both ends of the boring bar.

[0006] In one embodiment, the annular support frame includes a positioning plate, a copper bushing, a tension plate and a tension bolt. The copper bushing is arranged in the inner circle of the positioning plate, and the tension plate is arranged on both sides of the positioning plate through the tension bolt.

[0007] In one embodiment, the extended boring bar is in clearance fit with the inner circle of the annular support frame to ensure the rotational movement of the extended boring bar in the annular support frame.

[0008] In one embodiment, the number of the annular support frames is greater than or equal to 2, which is used for stable support and ensuring the straightness of the extended boring bar.

[0009] In one embodiment, the boring bar is of a hollow structure.

[0010] In one embodiment, both ends of the coupling are provided with connecting flanges, and 2-6 pin holes are uniformly arranged along the circumferential direction at one end.

[0011] In one embodiment, the copper sleeve and the inner circle of the positioning plate are assembled by interference fit.

[0012] In one embodiment, transverse oil holes and longitudinal oil holes that communicate with each other are provided in the annular support frame to supply oil to the inner circle of the annular support frame, so as to form an oil film on the inner circle of the annular support frame, avoid direct contact between metals, and reduce the wear of the boring bar.

[0013] The technical solution adopted by the present utility model can achieve the following beneficial effects:

[0014] The present utility model provides a deep hole processing device, which realizes the extension of the stroke of the existing machine tool, solves the problem of high-precision deep hole processing, and has the advantages of simple structure, convenient operation and high processing precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall assembly drawing;

[0016] Figure 2 is the schematic structural diagram of the extended boring bar;

[0017] Figure 3 is the schematic structural diagram of the annular support frame;

[0018] Figure 4 is the side view of the annular support frame;

[0019] Figure 5 is the schematic structural diagram of the lubrication system.

[0020] DESCRIPTION OF THE REFERENCE NUMERALS:

[0021] 101 - extended boring bar, 102 - first annular support frame, 103 - second annular support frame, 104 - lubrication system;

[0022] 201 - coupling, 202 - boring bar, 203 - boring tool;

[0023] 301 - positioning plate, 302 - copper sleeve, 303 - tensioning plate, 304 - tensioning bolt;

[0024] 401 - high-pressure oil pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", "top", "bottom", "bottom end", "top end" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] An embodiment of the utility model discloses a deep hole processing device, which is applied to the processing of high-precision deep holes of a compressor cylinder, and its stroke and precision both meet the processing requirements of high-precision deep holes of the product. The disclosed deep hole processing device includes: an extended boring bar, an annular support frame and a lubrication system.

[0029] Specifically, as Figure 1 shown, in order to ensure the straightness of the extended boring bar 101 in this embodiment, a two-point support method is adopted. Two support points are designed with two annular support frames. The extended boring bar 101 is installed through the first annular support frame 102 and the second annular support frame 103; the lubrication system is connected to the annular support frame to supply oil to the inner circle of the annular support frame. When in use, an oil film is formed on the inner circle of the annular support frame to avoid contact between metals, which can reduce wear; one end of the extended boring bar 101 is connected to the machine tool spindle, and the other end is used to install the boring tool 203.

[0030] Furthermore, the extended boring bar 101 is in clearance fit with the inner circles of the first annular support frame 102 and the second annular support frame 103, which can ensure the high-speed operation of the extended boring bar 101 during use. It should be noted that the structures and functions of the first annular support frame 102 and the second annular support frame 103 are the same.

[0031] Furthermore, the extended boring bar 101 can be lengthened according to the requirement of the hole depth. In order to ensure the stability of the extended boring bar 101, two or more support points can be set according to the requirement of the hole depth, and two or more annular support frames are added.

[0032] As Figure 2As shown in the figure, the extended boring bar 101, as a carrier for transmitting the rotary and linear motions of the machine tool, includes a coupling 201, a boring bar 202, and a boring tool 203. Both ends of the coupling 201 are provided with connecting flanges. One end flange is used to connect to the boring bar 202, adopting a bolt connection method; the other end flange is used to connect to the machine tool spindle, and 2 - 6 pin holes are evenly arranged along the circumferential direction at this end, and the connection with the machine tool spindle is made by using a positioning pin and bolts, ensuring that the coupling 201 is always concentric with the machine tool spindle; one end of the boring bar 202 is connected to the coupling 201, and the other end is provided with a tapered hole for installing the boring tool 203.

[0033] Further, the boring bar 202 is of a hollow structure, with the outer diameter accuracy of g6 and is precision - ground to a roughness of Ra0.8.

[0034] As Figure 3-4 shown in the figure, the annular support frame is used to support the extended boring bar 101, and specifically includes a positioning plate 301, a copper bushing 302, a tensioning plate 303, and tensioning bolts 304. The outer diameter of the positioning plate 301 is designed with an interference fit according to the inner diameter of the cylinder, and the interference fit gap is 0.01 - 0.05 mm; multiple through - holes are evenly arranged along the circumference of the positioning plate 301 for the assembly of the tensioning bolts 304; the copper bushing 302 is assembled with the inner circle of the positioning plate 301 by an interference fit. After the copper bushing 302 is cryogenically frozen, it is inserted into the inner circle of the positioning plate 301, and its diameter is designed with an interference fit with the outer diameter of the extended boring bar 101; the tensioning plate 303 is provided with through - holes corresponding to the positions and quantities of the through - holes on the positioning plate 301, and the tensioning plate 303 is fixed on both sides of the positioning 301 through the tensioning bolts 304.

[0035] As Figure 1 and Figure 5 shown in the figure, 2 longitudinal oil holes are drilled on the end face of the positioning plate 301, and threaded holes are designed at the orifice for the assembly of the high - pressure oil pipe 401. After the positioning plate 301 and the copper bushing 302 are assembled, 2 transverse oil holes are drilled. The transverse oil holes are communicated with the longitudinal oil holes on the end face of the positioning plate 301. The high - pressure oil pipe 401 is connected to an external high - pressure oil pump to realize the injection of high - pressure lubricating oil into the inner circle of the copper bushing 302.

[0036] A deep hole processing device disclosed by the utility model, during operation, first assembles the annular support frame in the inner circle of the cylinder. After fixing the annular support frame with the tensioning bolt 304, installs the extended boring bar 101 through the inner circle of the annular support frame. One end of the extended boring bar 101 is connected to the machine tool spindle. Adjust the position of the machine tool spindle to make the center of the positioning pin hole of the machine tool spindle coincide with the center of the pin hole of the coupling 201. Install the positioning pin and assemble the bolt to fasten the coupling 201 between the machine tool spindle and the extended boring bar 101. Then connect the high-pressure oil pipe to the oil hole of the annular support frame and externally connect a high-pressure oil pump to continuously supply oil. Finally, assemble the boring tool 203 in the tapered hole at the other end of the boring bar 202. Start the machine tool, transfer the rotary and linear motion of the machine tool to the extended boring bar 101, and continuously inject high-pressure lubricating oil to form an oil film in the inner circle of the copper sleeve 302 of the annular support frame, avoiding direct contact between metals, reducing the wear of the device while achieving high-precision deep hole boring processing.

[0037] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0038] The above-described embodiments only represent several implementation manners of the utility model, and the description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A deep hole machining device, characterized in that, The deep hole machining device includes an extended boring bar, an annular support frame, and a lubrication system. The extended boring bar is installed through the annular support frame, and the lubrication system is connected to the annular support frame.

2. The deep hole processing device according to claim 1, wherein, The extended boring bar includes a coupling, a boring bar, and a boring tool. The coupling and the boring tool are respectively arranged at both ends of the boring bar.

3. The deep hole machining device according to claim 1, characterized in that, The annular support frame includes a positioning plate, a copper bushing, a tension plate, and a tension bolt. The copper bushing is arranged in the inner circle of the positioning plate, and the tension plate is arranged on both sides of the positioning plate through the tension bolt.

4. The deep hole machining device according to claim 1, characterized in that, The extended boring bar is in clearance fit with the inner circle of the annular support frame.

5. The deep hole machining device according to claim 1, characterized in that, The number of the annular support frames is greater than or equal to 2.

6. The deep hole machining device according to claim 2, characterized in that, The boring bar is of a hollow structure.

7. The deep hole machining device according to claim 2, wherein Both ends of the coupling are provided with connecting flanges, and 2-6 pin holes are uniformly arranged along the circumferential direction at one end.

8. The deep hole machining device according to claim 3, characterized in that, The copper bushing and the inner circle of the positioning plate are assembled by an interference fit method.

9. The deep hole machining device according to any one of claims 1 or 3, characterized in that, Transverse oil holes and longitudinal oil holes that communicate with each other are arranged in the annular support frame for supplying oil to the inner circle of the annular support frame.

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