Deep hole machining high pressure water feeding device and boring machine

Abstract

The present application relates to a kind of high-pressure water supply device of deep hole machining, belong to deep hole machining technical field, solve the problem of the low efficiency of deep hole machining caused by the wear of the sealing element of the existing high-pressure water supply device and fast consumption, the high-pressure water supply device of deep hole machining includes inlet pipe and the sleeve assembly of the sleeve of boring bar outer periphery, the sleeve assembly includes the inner sleeve assembly and outer sleeve assembly sequentially arranged away from the outer wall of boring bar;The inner sleeve assembly includes tail sleeve assembly away from workpiece, and the tail sleeve assembly includes axial movement sealing assembly and circumferential rotation sealing assembly sequentially arranged away from the outer wall of boring bar;When boring bar axially moves, the axial movement sealing assembly is sealed to boring bar;When boring bar circumferentially rotates, the axial movement sealing assembly rotates with boring bar, and the circumferential rotation sealing assembly is circumferentially sealed to the side of axial movement sealing assembly away from boring bar.The present application can reduce the wear of sealing element, to improve the efficiency of deep hole machining.

Description

Technical Field

[0001] This invention relates to the field of deep hole machining technology, and in particular to a high-pressure water supply device and a boring machine for deep hole machining. Background Technology

[0002] Nuclear power pipeline products are high value-added products. Due to reliability requirements, the pipelines need to be forged as a whole, and then the forgings are machined into deep holes to form the required products.

[0003] Deep hole machining is typically performed using a boring machine. During deep hole machining, the iron filings generated in the workpiece need to be flushed out by high-pressure water, which requires a high-pressure water supply device.

[0004] In existing technologies, high-pressure water supply devices consist of a single-layer shell surrounding the boring bar, with direct contact and sealing between the shell and the boring bar. The end of the shell closest to the workpiece forms a water inlet chamber through a sealed contact with the workpiece. This method suffers from rapid wear and tear on the seals, requiring frequent shutdowns for seal replacement, resulting in low efficiency in deep hole machining. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a high-pressure water supply device and boring machine for deep hole machining, in order to solve the problem of high wear and rapid consumption of seals in existing high-pressure water supply devices, resulting in low efficiency of deep hole machining.

[0006] On one hand, embodiments of the present invention provide a high-pressure water supply device for deep hole machining. The high-pressure water supply device for deep hole machining includes a water inlet pipe and a sleeve assembly sleeved on the outer periphery of a boring bar. The sleeve assembly includes an inner sleeve assembly and an outer sleeve assembly arranged sequentially in the direction away from the outer wall of the boring bar.

[0007] The inner sleeve assembly includes a tail sleeve assembly located away from the workpiece, and the tail sleeve assembly includes an axial motion sealing assembly and a circumferential rotation sealing assembly arranged sequentially along the direction away from the outer wall of the boring bar.

[0008] When the boring bar moves axially, the axial movement sealing assembly provides an axial seal to the boring bar; when the boring bar rotates circumferentially, the axial movement sealing assembly rotates together with the boring bar, and the circumferential rotation sealing assembly provides a circumferential rotation seal to the side of the axial movement sealing assembly away from the boring bar.

[0009] Preferably, the inner sleeve assembly further includes an end sleeve assembly near the workpiece, the end sleeve assembly being sealed to the workpiece, and the end sleeve assembly rotating together with the workpiece when the workpiece rotates.

[0010] Preferably, the axial motion sealing assembly includes a tapered sleeve and a tail sleeve;

[0011] A boring bar seal is provided between the end of the tail sleeve closest to the workpiece and the boring bar, and the tapered sleeve is provided between the end of the tail sleeve furthest from the workpiece and the boring bar.

[0012] Preferably, the axial motion sealing assembly further includes a clamping bearing, which is disposed at the end of the tapered sleeve away from the workpiece. The clamping bearing is disposed inside the screw cap, and the clamping bearing and the screw cap press the tapered sleeve between the tail sleeve and the boring bar.

[0013] Preferably, the circumferential rotary sealing assembly includes a rear sealing cover, a tail bearing, and a tail cover disposed on the side of the tail sleeve away from the boring bar;

[0014] A rear end seal is provided between the end of the tail sleeve near the workpiece and the rear sealing cover, and the tail bearing is located between the rear sealing cover and the tail cover.

[0015] Preferably, the circumferential rotary sealing assembly further includes a gland, which is disposed on the side of the tail cap away from the workpiece.

[0016] Preferably, the end sleeve assembly includes an end seal, an end sleeve, an end sleeve bearing, and an end sleeve pressure bearing;

[0017] The end seal is disposed between the end sleeve and the workpiece, and the end sleeve bearing and the end sleeve pressure bearing are disposed on the side of the end sleeve away from the boring bar.

[0018] Preferably, the outer cover assembly includes a front cover and a back cover;

[0019] The front sleeve is disposed on the side of the end sleeve assembly away from the boring bar; one end of the rear sleeve is disposed on the side of the end sleeve assembly away from the boring bar, and the other end is disposed on the side of the tail sleeve assembly away from the boring bar.

[0020] Preferably, the outer sleeve assembly, the end sleeve assembly away from the workpiece, the end sleeve assembly near the workpiece, and the boring bar form a first water inlet cavity; the end sleeve assembly and the boring bar form a second water inlet cavity;

[0021] The water inlet pipe, the first water inlet chamber, the second water inlet chamber, the cutting chamber between the boring head and the workpiece, and the inner cavity of the boring bar are connected in sequence.

[0022] Secondly, the present invention also provides a boring machine, wherein the boring bar of the boring machine is provided with the above-mentioned high-pressure water supply device for deep hole machining.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0024] 1. In the high-pressure water supply device for deep hole machining of the present invention, when the boring bar moves axially, the axial motion sealing component seals the surface of the boring bar. With repeated axial movements, only axial scratches are formed on the surface of the boring bar, and the seal can still seal within these scratches, minimizing the impact on the seal. When the boring bar rotates circumferentially, the axial motion sealing component rotates together with the boring bar, and the circumferential rotation sealing component performs axial rotation sealing on the side of the axial motion sealing component away from the boring bar, minimizing wear on the circumferential rotation sealing component. In other words, the present invention transforms the existing sealing component, which simultaneously undertakes axial and circumferential sealing, into using different sealing components to undertake axial and circumferential sealing respectively, reducing wear on the rear-end seal and reducing the frequency of downtime for seal replacement, thereby improving the efficiency of deep hole machining.

[0025] 2. The high-pressure water supply device for deep hole machining of the present invention has a seal between the end sleeve assembly and the workpiece. When the workpiece rotates, the end sleeve assembly rotates together with the workpiece, reducing wear at the front end and further improving the efficiency of deep hole machining.

[0026] 3. The high-pressure water supply device for deep hole machining of the present invention can adjust the clamping degree of the pressure bearing on the tapered sleeve by adjusting the screw cap when machining different workpieces, thereby adjusting the friction between the tapered sleeve and the boring bar, ensuring that the tapered sleeve and the tail sleeve can rotate together with the boring bar, making the device suitable for deep hole machining of different workpieces and with a wide range of applications.

[0027] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0028] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0029] Figure 1 The present invention relates to a high-pressure water delivery device for deep hole machining.

[0030] Figure label:

[0031] 1-Workpiece; 2-Bore boring head; 3-Bore boring bar; 4-End seal; 5-End sleeve; 6-Front cover O-ring seal; 7-Front cover; 8-End sleeve bearing; 9-End sleeve pressure bearing; 10-Front sleeve; 11-Rear sleeve front bearing; 12-Front end seal; 13-Conduit; 14-Rear end external O-ring seal; 15-Rear end seal; 16-Bore boring bar seal; 17-Tail bearing; 18-Spacer ring; 19-Tail cover external O-ring seal; 20-Tail cover; 21-Pressure cap; 22-Tail cover inner O-ring seal; 23-Guide sleeve; 24-Conical sleeve; 25-Tail sleeve; 26-First water inlet chamber; 27-Rear sleeve; 28-Front sleeve bolt; 29-Front cover bolt; 30-Cutting chamber; 31-Screw cap; 32-Pressure bearing; 33-Pressure cap bolt; 34-Rear sealing cap; 35-Second water inlet chamber. Detailed Implementation

[0032] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0033] The inventors discovered during their research that in deep hole machining, the boring bar and workpiece move in two ways: 1. The workpiece rotates rapidly, and the torque generated by this rapid rotation causes the boring bar to rotate slowly, and it also moves axially as the deep hole machining progresses; 2. The workpiece remains stationary, the boring bar rotates rapidly, and it also moves axially as the deep hole machining progresses. Regardless of the method, the boring bar undergoes both circumferential and axial rotation. In existing technologies, when the workpiece rotates, the housing remains stationary. The seal between the housing and the boring bar must simultaneously withstand rotational and axial friction, resulting in sharp, spiral-shaped scratches on the boring bar surface. These sharp scratches easily damage the rear seal. Furthermore, because the housing remains stationary while the workpiece rotates, the seal between the housing and the workpiece is also subject to significant damage, meaning the front seal is also easily damaged. This leads to rapid and high wear on the seals, requiring machine downtime for replacement, resulting in low efficiency in deep hole machining.

[0034] Based on this, on the one hand, the present invention provides a high-pressure water delivery device for deep hole machining, such as... Figure 1 As shown, the deep hole machining high-pressure water supply device includes a water inlet pipe 13 and a sleeve assembly sleeved on the outer periphery of the boring bar 3. The sleeve assembly includes an inner sleeve assembly and an outer sleeve assembly arranged sequentially in the direction away from the outer wall of the boring bar 3.

[0035] The inner sleeve assembly includes a tail sleeve assembly located away from the workpiece 1. The tail sleeve assembly includes an axial motion sealing assembly and a circumferential rotation sealing assembly arranged sequentially along the direction away from the outer wall of the boring bar 3.

[0036] When the boring bar 3 moves axially, the axial movement sealing assembly provides an axial seal to the boring bar 3; when the boring bar 3 rotates circumferentially, the axial movement sealing assembly rotates together with the boring bar 3, and the circumferential rotation sealing assembly provides an axial rotation seal to the side of the axial movement sealing assembly away from the boring bar 3.

[0037] Compared with existing technologies, the high-pressure water supply device for deep hole machining of the present invention, when the boring bar moves axially, the axial motion sealing component seals the surface of the boring bar. With repeated axial movements, only axial scratches are formed on the surface of the boring bar, and the seal can still seal within these scratches, minimizing the impact on the seal. When the boring bar rotates circumferentially, the axial motion sealing component rotates together with the boring bar, and the circumferential rotation sealing component performs axial rotation sealing on the side of the axial motion sealing component away from the boring bar, resulting in less wear on the circumferential rotation sealing component. In other words, the present invention transforms the existing method of using a seal that simultaneously undertakes axial and circumferential sealing into using different sealing components to undertake axial and circumferential sealing respectively, reducing wear on the rear-end seal and the frequency of downtime for seal replacement, thereby improving the efficiency of deep hole machining.

[0038] For example, the inner sleeve assembly also includes an end sleeve assembly near the workpiece 1, the end sleeve assembly being sealed to the workpiece 1. When the workpiece 1 rotates, the end sleeve assembly rotates together with the workpiece 1, reducing wear at the front end and further improving the efficiency of deep hole machining.

[0039] For example, the axial motion sealing assembly includes a tapered sleeve 24 and a tail sleeve 25.

[0040] For example, the tapered sleeve 24 is made of one of copper, copper alloy and Babbitt metal.

[0041] A boring bar seal 16 is provided between the end of the tail sleeve 25 near the workpiece 1 and the boring bar 3, and the tapered sleeve 24 is provided between the end of the tail sleeve 25 away from the workpiece 1 and the boring bar 3.

[0042] For example, the axial motion sealing assembly further includes a clamping bearing 32, which is disposed at the end of the tapered sleeve 24 away from the workpiece 1. The clamping bearing 32 is disposed inside the screw cap 31, and the clamping bearing 32 and the screw cap 31 press the tapered sleeve 24 between the tail sleeve 25 and the boring bar 3. Adjusting the screw cap 31 can adjust the engagement force between the tapered sleeve 24 and the boring bar 3, so that the boring bar 3 is centered and allows the boring bar 3 to make axial movements, while allowing the tapered sleeve 24 and the tail sleeve 25 to rotate together when the boring bar 3 rotates circumferentially.

[0043] For example, two boring bar seals 16 are provided along the axial direction of the boring bar 3.

[0044] For example, the circumferential rotary sealing assembly includes a rear sealing cover 34, a tail bearing 17, and a tail cover 20 disposed on the side of the tail sleeve 25 away from the boring bar 3; a rear end seal 15 is disposed between the end of the tail sleeve 25 near the workpiece 1 and the rear sealing cover 34, and the tail bearing 17 is disposed between the rear sealing cover 34 and the tail cover 20.

[0045] A rear end seal 15 is provided between the end of the tail sleeve 25 near the workpiece 1 and the rear sealing cover 34. The tail bearing 17 is located between the rear sealing cover 34 and the tail cover 20. The tail bearing 17 allows the tapered sleeve 24, tail sleeve 25, boring bar seal 16 and boring bar 3 to rotate circumferentially together. When the boring bar 3 rotates circumferentially, the rear end seal 15 plays a sealing role.

[0046] For example, two tail bearings 17 are provided, which are arranged along the axial direction of the boring bar and separated by a spacer ring 18.

[0047] The surface of the tail sleeve 25 away from the boring bar 3 can be a smooth surface to reduce wear on the rear seal 15.

[0048] For example, two rear end seals 15 are provided along the axial direction of the boring bar 3.

[0049] For example, the circumferential rotary sealing assembly further includes a pressure cap 21 disposed on the side of the tail cap 20 away from the workpiece 1.

[0050] For example, the side of the pressure cap 21 near the boring bar contacts the side of the screw cap 31 away from the boring bar, and they are threaded together. There is a gap between the screw cap 31 and the boring bar 3, and the engagement force between the tapered sleeve 24 and the boring bar 3 is adjusted by turning the screw cap 31.

[0051] For example, an O-ring seal 22 is provided inside the tail cap 20 between the tail cap 20 and the tail sleeve 25.

[0052] For example, the end sleeve assembly includes an end seal 4, an end sleeve 5, an end sleeve bearing 8, and an end sleeve pressure bearing 9;

[0053] The end seal 4 is disposed between the end sleeve 5 and the workpiece 1, and the end sleeve bearing 8 and the end sleeve pressure bearing 9 are disposed on the side of the end sleeve 5 away from the boring bar 3. The end seal 4 and the end sleeve 5 press against the workpiece 3, and when the workpiece 3 rotates, the end seal 4, the end sleeve 5 and the workpiece 3 rotate together.

[0054] Among them, the end sleeve bearing 8 is circumferentially centered and is used to bear radial force and support the rotational movement of the end sleeve 5; the end sleeve pressure bearing 9 is used to bear axial force, because the end seal 4 requires axial pressure to have good contact with the workpiece 1 and to play a sealing role. At the same time, there is relative rotational movement between the end sleeve 5 and the front sleeve 10, so a sleeve pressure bearing 9 is needed for connection.

[0055] For example, the outer garment assembly includes a front cover 10 and a back cover 27;

[0056] The front sleeve 10 is located on the side of the end sleeve assembly away from the boring bar 3; one end of the rear sleeve 27 is located on the side of the end sleeve assembly away from the boring bar 3, and the other end is located on the side of the tail sleeve assembly away from the boring bar 3.

[0057] For example, the outer sleeve assembly, the end sleeve assembly away from the workpiece 1, the end sleeve assembly close to the workpiece 1, and the boring bar 3 form a first water inlet cavity 26; the end sleeve assembly and the boring bar 3 form a second water inlet cavity 35;

[0058] The water inlet pipe 13, the first water inlet chamber 26, the second water inlet chamber 35, the cutting chamber 30 between the boring head 2 and the workpiece 1, and the inner cavity of the boring bar 3 are connected in sequence.

[0059] Specifically, the end sleeve bearing 8 and the end sleeve pressure bearing 9 are located between the front sleeve 10 and the end sleeve 5. The end sleeve bearing 8 is close to the workpiece 1, and the end sleeve pressure bearing 9 is far away from the workpiece 1.

[0060] Specifically, the end sleeve bearing 8 is disposed in the cavity formed by the end of the front sleeve 10 near the workpiece, the front cover 7 and the end sleeve 5 near the workpiece, and the front cover 7 is fixed to the front sleeve 10 by the front cover bolt 29.

[0061] For example, a front cover O-ring seal 6 is provided between the front cover 7 and the end sleeve 5.

[0062] For example, the end of the front sleeve 10 away from the workpiece 1 and the end of the rear sleeve 27 close to the workpiece 1 are fixedly connected by the front sleeve bolt 28.

[0063] For example, a front bearing 11 of the rear sleeve 27 is provided between the end of the rear sleeve 27 near the workpiece 1 and the end sleeve 5.

[0064] For example, a front sealing element 12 is also provided between the rear sleeve 27 and the workpiece 1, and the front sealing element 12 keeps the end sleeve bearing 8, the end sleeve pressure bearing 9, and the rear sleeve front bearing 11 in a waterless environment.

[0065] Specifically, the rear sealing cover 34, the tail bearing 17, and the tail cover 20 are located between the end of the rear sleeve 27 away from the workpiece 1 and the tail sleeve 25.

[0066] For example, a rear external O-ring seal 14 is provided between the end of the rear sleeve 27 away from the workpiece 1 and the rear sealing cover 34. The rear external O-ring seal 14 and the rear seal 15 keep the tail bearing 17 in a waterless environment.

[0067] For example, an external O-ring seal 19 is provided between the end of the rear sleeve 27 away from the workpiece 1 and the tail cover 20.

[0068] For example, the end of the pressure cap 21 and the rear sleeve 27 away from the workpiece 1 is fixedly connected by the pressure cap bolt 33.

[0069] The screw cap 31 and the pressure cap 21 are threaded together. Adjusting the screw cap 31 can adjust the fit between the tapered sleeve 24 and the boring bar 3.

[0070] For example, a guide sleeve 23 is provided between the end sleeve 5 and the boring bar 3, and the guide sleeve 23 is used to guide the boring head 2 in the initial stage of drilling.

[0071] In this invention, O-ring seals are used for static and circumferential sealing, and U-ring seals are used for axial motion sealing.

[0072] Specifically, the end seal 4, the front cover O-ring seal 6, the front end seal 12, the rear end external O-ring seal 14, the rear end seal 15, the tail cover external O-ring seal 19, and the tail cover internal O-ring seal 22 are all O-ring seals; the boring bar seal is a U-shaped seal.

[0073] During implementation, high-pressure water in conduit 13 sequentially enters the first water inlet chamber 26, the second water inlet chamber 35, and the cutting chamber 30, flushing the iron filings in the cutting chamber 30 into the inner cavity of the boring bar 3, and then discharging them through the boring bar 3, thus completing the process of flushing out the iron filings with high-pressure water. During this process, if the workpiece 1 rotates rapidly, the end sleeve 5 and the end seal 4 rotate together with the workpiece 1, reducing wear on the front end seal. Rapid rotation of the workpiece 1 causes the boring bar 3 to rotate slowly circumferentially, and the boring bar seal 16, the tapered sleeve 24, and the tail sleeve 25 rotate together with the boring bar 3, providing a circumferential seal. Simultaneously, the boring bar 3 moves axially, and the boring bar seal 16 provides an axial seal, reducing wear on the rear end seal.

[0074] Secondly, the present invention also provides a boring machine, wherein the boring bar of the boring machine is provided with the above-mentioned high-pressure water supply device for deep hole machining.

[0075] The following specific embodiments further illustrate the high-pressure water supply device and boring machine for deep hole machining of the present invention.

[0076] Example 1

[0077] This embodiment provides a high-pressure water supply device for deep hole machining and a boring machine, wherein the high-pressure water supply device for deep hole machining is mounted on the boring bar of the boring machine.

[0078] The high-pressure water supply device for deep hole machining includes an inlet pipe 13 and a sleeve assembly fitted around the outer periphery of the boring bar 3. The sleeve assembly includes an inner sleeve assembly and an outer sleeve assembly arranged sequentially away from the outer wall of the boring bar 3. The inner sleeve assembly includes a tail sleeve assembly away from the workpiece 1. The tail sleeve assembly includes an axial motion sealing assembly and a circumferential rotation sealing assembly arranged sequentially along the direction away from the outer wall of the boring bar 3. When the boring bar 3 moves axially, the axial motion sealing assembly provides an axial seal to the boring bar 3. When the boring bar 3 rotates circumferentially, the axial motion sealing assembly rotates together with the boring bar 3, and the circumferential rotation sealing assembly provides an axial rotation seal to the side of the axial motion sealing assembly away from the boring bar 3. The inner sleeve assembly also includes an end sleeve assembly close to the workpiece 1, which seals against the workpiece 1. When the workpiece 1 rotates, the end sleeve assembly rotates together with the workpiece 1.

[0079] The axial motion sealing assembly includes a tapered sleeve 24 and a tail sleeve 25. A boring bar seal 16 is disposed between the end of the tail sleeve 25 near the workpiece 1 and the boring bar 3. The tapered sleeve 24 is disposed between the end of the tail sleeve 25 away from the workpiece 1 and the boring bar 3. The axial motion sealing assembly also includes a clamping bearing 32, which is disposed at the end of the tapered sleeve 24 away from the workpiece 1 and is located inside a screw cap 31. The clamping bearing 32 and the screw cap 31 press the tapered sleeve 24 between the tail sleeve 25 and the boring bar 3. Two boring bar seals 16 are disposed along the axial direction of the boring bar 3. The circumferential rotation sealing assembly includes a rear sealing cover 34 disposed on the side of the tail sleeve 25 away from the boring bar 3, a tail bearing 17, and a tail cover 20. Two tail bearings 17 are disposed, arranged along the axial direction of the boring bar, and separated by a spacer ring 18. The surface of the tail sleeve 25 away from the boring bar 3 can be a smooth surface. Two rear end seals 15 are provided along the axial direction of the boring bar 3. The circumferential rotary sealing assembly also includes a pressure cap 21, which is located on the side of the tail cover 20 away from the workpiece 1. The side of the pressure cap 21 near the boring bar contacts the side of the screw cap 31 away from the boring bar and is threaded together. An O-ring seal 22 is provided between the tail cover 20 and the tail sleeve 25. The tapered sleeve 24 is made of copper.

[0080] The end sleeve assembly includes an end seal 4, an end sleeve 5, an end sleeve bearing 8, and an end sleeve pressure bearing 9. The end seal 4 is disposed between the end sleeve 5 and the workpiece 1. The end sleeve bearing 8 and the end sleeve pressure bearing 9 are disposed on the side of the end sleeve 5 away from the boring bar 3. The end seal 4 and the end sleeve 5 press against the workpiece 3. When the workpiece 3 rotates, the end seal 4, the end sleeve 5, and the workpiece 3 rotate together. The outer sleeve assembly includes a front sleeve 10 and a rear sleeve 27. The front sleeve 10 is disposed on the side of the end sleeve assembly away from the boring bar 3. One end of the rear sleeve 27 is disposed on the side of the end sleeve assembly away from the boring bar 3, and the other end is disposed on the side of the tail sleeve assembly away from the boring bar 3. The outer sleeve assembly, the end sleeve assembly away from the workpiece 1, the end sleeve assembly near the workpiece 1, and the boring bar 3 form a first water inlet cavity 26; the end sleeve assembly and the boring bar 3 form a second water inlet cavity 35; the water inlet pipe 13, the first water inlet cavity 26, the second water inlet cavity 35, the cutting cavity 30 between the boring head 2 and the workpiece 1, and the inner cavity of the boring bar 3 are sequentially connected. An end sleeve bearing 8 and an end sleeve pressure bearing 9 are located between the front sleeve 10 and the end sleeve 5, with the end sleeve bearing 8 near the workpiece 1 and the end sleeve pressure bearing 9 away from the workpiece 1. The end sleeve bearing 8 is disposed in the cavity formed by the end of the front sleeve 10 near the workpiece, the front cover 7, and the end sleeve 5 near the workpiece. The front cover 7 is fixed to the front sleeve 10 by a front cover bolt 29. A front cover O-ring seal 6 is provided between the front cover 7 and the end sleeve 5. The end of the front sleeve 10 away from the workpiece 1 and the end of the rear sleeve 27 near the workpiece 1 are fixedly connected by a front sleeve bolt 28. A rear sleeve front bearing 11 is installed between the end of the rear sleeve 27 closest to the workpiece 1 and the end sleeve 5. A front sealing element 12 is also installed between the rear sleeve 27 and the workpiece 1. A rear sealing cover 34, a tail bearing 17, and a tail cover 20 are installed between the end of the rear sleeve 27 furthest from the workpiece 1 and the tail sleeve 25. A rear external O-ring seal 14 is installed between the end of the rear sleeve 27 furthest from the workpiece 1 and the rear sealing cover 34. A tail cover external O-ring seal 19 is installed between the end of the rear sleeve 27 furthest from the workpiece 1 and the tail cover 20. A pressure cap 21 is fixedly connected to the end of the rear sleeve 27 furthest from the workpiece 1 by a pressure cap bolt 33. The adjusting screw cap 31 can not only adjust the fit between the tapered sleeve 24 and the boring bar 3, but also adjust the sealing pressure of the end sealing element 4, thereby enabling the workpiece 1 and the end sleeve 5 to rotate together. A guide sleeve 23 is installed between the end sleeve 5 and the boring bar 3.

[0081] When performing deep hole machining on a workpiece (material: 45 steel) using the boring machine of this embodiment, the adjusting cap 31 is used to press the tapered sleeve 24 tightly against the boring bar, and the end seal 4 presses the workpiece tightly. High-pressure water in the conduit 13 sequentially enters the first water inlet chamber 26, the second water inlet chamber 35, and the cutting chamber 30, flushing the iron filings in the cutting chamber 30 into the inner cavity of the boring bar 3, and then discharging them through the boring bar 3, thus completing the process of flushing out the iron filings with high-pressure water. The front end seal is replaced approximately every 400 hours, and the rear end seal is replaced approximately every 1300 hours.

[0082] Example 2

[0083] This embodiment is similar to the deep-hole machining high-pressure water supply device and boring machine in Embodiment 1, except that it does not have an end sleeve assembly. The end of the front sleeve 10 closest to the workpiece directly contacts the workpiece, and a front-end seal is provided between them. When the workpiece 1 rotates, the front sleeve 10 and the front-end seal do not rotate.

[0084] The front seal should be replaced approximately every 24 hours, while the rear seal should be replaced approximately every 1300 hours.

[0085] Example 3

[0086] This embodiment is similar to the deep hole machining high-pressure water supply device and boring machine in Embodiment 1, except that the workpiece is made of low-carbon steel.

[0087] The front seal is replaced approximately every 400 hours, and the rear seal is replaced approximately every 1300 hours.

[0088] Comparative Example 1

[0089] The comparative example provides an existing high-pressure water supply device and boring machine for deep hole machining, wherein the high-pressure water supply device for deep hole machining is mounted on the boring bar of the boring machine.

[0090] The high-pressure water supply device includes a single-layer shell installed outside the boring bar, with direct contact and sealing between the shell and the boring bar, and the end of the shell closest to the workpiece in sealed contact with the workpiece to form a water inlet chamber.

[0091] The front seal should be replaced approximately every 24 hours, and the rear seal should be replaced approximately every 60 hours.

[0092] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-pressure water delivery device for deep hole machining, characterized in that, The deep hole machining high-pressure water supply device includes a water inlet pipe (13) and a sleeve assembly sleeved on the outer periphery of the boring bar (3). The sleeve assembly includes an inner sleeve assembly and an outer sleeve assembly arranged sequentially in the direction away from the outer wall of the boring bar (3). The inner sleeve assembly includes a tail sleeve assembly away from the workpiece (1), and the tail sleeve assembly includes an axial motion sealing assembly and a circumferential rotation sealing assembly arranged sequentially along the direction away from the outer wall of the boring bar (3); When the boring bar (3) moves axially, the axial movement sealing assembly seals the boring bar (3) axially; when the boring bar (3) rotates circumferentially, the axial movement sealing assembly rotates together with the boring bar (3), and the circumferential rotation sealing assembly performs axial rotation sealing on the side of the axial movement sealing assembly away from the boring bar (3); The axial motion sealing assembly includes a tapered sleeve (24) and a tail sleeve (25); A boring bar seal (16) is provided between the end of the tail sleeve (25) near the workpiece (1) and the boring bar (3), and the tapered sleeve (24) is provided between the end of the tail sleeve (25) away from the workpiece (1) and the boring bar (3); The axial motion sealing assembly also includes a clamping bearing (32), which is disposed at the end of the tapered sleeve (24) away from the workpiece (1). The clamping bearing (32) is disposed inside the screw cap (31). The clamping bearing (32) and the screw cap (31) press the tapered sleeve (24) between the tail sleeve (25) and the boring bar (3). The circumferential rotary sealing assembly includes a rear sealing cover (34), a tail bearing (17), and a tail cover (20) disposed on the side of the tail sleeve (25) away from the boring bar (3). A rear end seal (15) is provided between the end of the tail sleeve (25) near the workpiece (1) and the rear sealing cover (34), and the tail bearing (17) is provided between the rear sealing cover (34) and the tail cover (20); The circumferential rotary sealing assembly also includes a gland (21) disposed on the side of the tail cap (20) away from the workpiece (1).

2. The high-pressure water delivery device for deep hole machining according to claim 1, characterized in that, The inner sleeve assembly also includes an end sleeve assembly near the workpiece (1), the end sleeve assembly being sealed to the workpiece (1), and the end sleeve assembly rotating together with the workpiece (1) when the workpiece (1) rotates.

3. The high-pressure water delivery device for deep hole machining according to claim 2, characterized in that, The end sleeve assembly includes an end seal (4), an end sleeve (5), an end sleeve bearing (8), and an end sleeve pressure bearing (9). The end seal (4) is disposed between the end sleeve (5) and the workpiece (1), and the end sleeve bearing (8) and the end sleeve pressure bearing (9) are disposed on the side of the end sleeve (5) away from the boring bar (3).

4. The high-pressure water delivery device for deep hole machining according to claim 2, characterized in that, The outer garment assembly includes a front cover (10) and a back cover (27); The front sleeve (10) is located on the side of the end sleeve assembly away from the boring bar (3); one end of the rear sleeve (27) is located on the side of the end sleeve assembly away from the boring bar (3), and the other end is located on the side of the tail sleeve assembly away from the boring bar (3).

5. The high-pressure water delivery device for deep hole machining according to claim 4, characterized in that, The outer sleeve assembly, the end sleeve assembly away from the workpiece (1), the end sleeve assembly close to the workpiece (1), and the boring bar (3) form a first water inlet cavity (26); the end sleeve assembly and the boring bar (3) form a second water inlet cavity (35). The water inlet pipe (13), the first water inlet chamber (26), the second water inlet chamber (35), the cutting chamber (30) between the boring head (2) and the workpiece (1) and the inner cavity of the boring bar (3) are connected in sequence.

6. A boring machine, characterized in that, The boring bar of the boring machine is provided with a high-pressure water supply device for deep hole machining as described in any one of claims 1-5.

Images