Oil sealing structure of deep hole drilling machine, deep hole drilling machine and workpiece clamping method

Abstract

The invention provides an oil sealing structure of a deep hole drilling machine, the deep hole drilling machine and a workpiece clamping method, and relates to the technical field of deep hole machining equipment.The oil sealing structure of the deep hole drilling machine comprises a clamping table and an oil sealing disc, and the oil sealing disc is installed at the end of the clamping table; the inner wall of the oil sealing disc is provided with a first conical abutting face and a second conical abutting face, the second abutting face is located on the side, away from the clamping table, of the first abutting face, and the diameter of the first abutting face and the diameter of the second abutting face are gradually increased in the direction away from the clamping table. The diameter of the small end of the second abutting face is larger than that of the large end of the first abutting face, and the first abutting face and the second abutting face are used for abutting against the edges of the end faces of workpieces with different outer diameters respectively. The oil sealing structure of the deep hole drilling machine is better in universality, the oil sealing disc does not need to be frequently replaced according to different workpiece outer diameters, replacement time consumption is reduced, and the machining efficiency of workpieces can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of deep hole processing equipment, and in particular to an oil sealing structure of a deep hole drilling machine, a deep hole drilling machine and a workpiece clamping method. Background Art

[0002] During deep hole processing on a deep hole drilling machine, it is often necessary to install an oil seal on the clamping table to prevent the cutting fluid in the inner hole of the workpiece from leaking out in large quantities between the workpiece and the clamping table. However, the same oil seal usually only meets the oil sealing needs of workpieces with a single outer diameter specification.

[0003] Therefore, in order to meet the oil sealing requirements of the workpiece, the related technology often replaces the oil sealing disk according to the outer diameter of the workpiece. Each replacement process is time-consuming, which will affect the overall processing efficiency of the workpiece. Summary of the invention

[0004] The problem solved by the invention is: how to provide an oil sealing structure with better versatility to improve the processing efficiency of workpieces.

[0005] In order to solve the above problems, the present invention provides a deep hole drilling machine oil sealing structure, a deep hole drilling machine and a workpiece clamping method.

[0006] In the first aspect, the present invention provides an oil sealing structure for a deep hole drilling machine, comprising a clamping table and an oil sealing plate, wherein the oil sealing plate is installed at the end of the clamping table, and the inner wall of the oil sealing plate is provided with a conical first tightening surface and a conical second tightening surface, and the second tightening surface is located on the side of the first tightening surface away from the clamping table, and the diameter of the first tightening surface and the diameter of the second tightening surface respectively gradually increase in the direction away from the clamping table, and the small end diameter of the second tightening surface is larger than the large end diameter of the first tightening surface, and the first tightening surface and the second tightening surface are respectively used to abut against the end face edges of workpieces with different outer diameters.

[0007] The beneficial effects of the deep hole drilling machine oil sealing structure of the present invention are as follows: since the first tightening surface is conical and its diameter gradually increases in the direction away from the clamping table, the first tightening surface as a whole will constitute a conical surface with open ends, so that as long as the outer diameter of the workpiece is between the small end diameter and the large end diameter of the first tightening surface, the workpiece can be extended into the first tightening surface to tightly abut against the first tightening surface in the circumferential direction, thereby achieving sealing to meet the oil sealing requirements; in addition, since the second tightening surface is conical and its diameter gradually increases in the direction away from the clamping table, the second tightening surface as a whole will constitute a conical surface with open ends, so that as long as the outer diameter of the workpiece is between the small end diameter and the large end diameter of the second tightening surface, the workpiece can be extended into the second tightening surface to tightly abut against the second tightening surface in the circumferential direction, thereby achieving sealing to meet the oil sealing requirements. Therefore, it can meet the oil sealing needs of all specifications of workpieces whose outer diameters are between the small end diameter and the large end diameter of the first tightening surface, and can also meet the oil sealing needs of all specifications of workpieces whose outer diameters are between the small end diameter and the large end diameter of the second tightening surface, thereby improving the versatility of the oil sealing structure. There is no need to frequently replace the oil sealing plate according to the outer diameters of different workpieces, which reduces the time spent on replacement and is beneficial to improving the processing efficiency of the workpiece.

[0008] Optionally, the inner wall of the oil sealing plate is provided with an annular mounting surface, the inner periphery of the mounting surface is connected to the large end edge of the first tightening surface, and the outer periphery of the mounting surface is connected to the small end edge of the second tightening surface. The oil sealing plate is provided with a first mounting hole which sequentially passes through the end surface of the oil sealing plate close to the clamping platform and the mounting surface, and the end of the clamping platform is provided with a second mounting hole axially opposite to the first mounting hole. The deep hole drilling machine oil sealing structure also includes fasteners which are sequentially penetrated through the first mounting hole and the second mounting hole.

[0009] Optionally, a concave stop coaxial with the oil sealing plate is provided at the end of the clamping platform, and a convex stop cooperating with the concave stop is provided on the oil sealing plate.

[0010] Optionally, the outer wall of the oil sealing plate is provided with an annular surface parallel to the end surface of the oil sealing plate away from the clamping platform, and the oil sealing plate is also provided with a threaded hole that sequentially passes through the end surface of the oil sealing plate away from the clamping platform and the annular surface, and the threaded hole is used for threaded connection of a top screw.

[0011] Optionally, a guide sleeve is further included, which is located in the second tightening surface and is detachably connected to the mounting surface. The inner diameter of the guide sleeve gradually increases in the direction away from the clamping table, and the inner diameter of the end of the guide sleeve close to the first tightening surface is equal to the large end diameter of the first tightening surface.

[0012] Optionally, one end of the guide sleeve away from the first pressing surface protrudes from the oil sealing disk along the axial direction of the oil sealing disk.

[0013] In a second aspect, the present invention provides a deep hole drilling machine, comprising the deep hole drilling machine oil sealing structure as described above.

[0014] In a third aspect, the present invention provides a workpiece clamping method based on the deep hole drilling machine oil sealing structure as described above, the workpiece clamping method comprising:

[0015] When the outer diameter of the workpiece is larger than the small end diameter of the first pressing surface and smaller than the large end diameter of the first pressing surface, the end surface edge of the workpiece is brought into contact with the first pressing surface;

[0016] When the outer diameter of the workpiece is larger than the small end diameter of the second pressing surface and smaller than the large end diameter of the second pressing surface, the end surface edge of the workpiece is brought into contact with the second pressing surface.

[0017] The beneficial effects of the workpiece clamping method of the present invention are as follows: when the outer diameter of the workpiece is larger than the small end diameter of the first tightening surface and smaller than the large end diameter of the first tightening surface, the end face edge of the workpiece is abutted against the first tightening surface to achieve an adaptive fitting seal between the workpiece and the first tightening surface whose outer diameter is between the small end diameter and the large end diameter of the first tightening surface; and when the outer diameter of the workpiece is larger than the small end diameter of the second tightening surface and smaller than the large end diameter of the second tightening surface, the end face edge of the workpiece is abutted against the second tightening surface to achieve an adaptive fitting seal between the workpiece and the second tightening surface whose outer diameter is between the small end diameter and the large end diameter of the second tightening surface, that is, the sealed clamping of workpieces with different outer diameter specifications at the oil sealing structure of the deep hole drilling machine can be achieved, and there is no need to frequently replace the oil sealing plate, which greatly increases the clamping efficiency of the workpiece.

[0018] Optionally, when the outer diameter of the workpiece is larger than the small end diameter of the first pressing surface and smaller than the large end diameter of the first pressing surface, before the end surface edge of the workpiece is brought into contact with the first pressing surface, the method further comprises:

[0019] A chamfer is machined on the end face edge of the workpiece, and the machining amount of the chamfer is less than the machining allowance of the workpiece.

[0020] Optionally, the step of bringing the end face edge of the workpiece into contact with the first pressing surface comprises: installing a guide sleeve on a mounting surface, inserting one end of the workpiece into an oil sealing structure of a deep hole drilling machine, and moving the end face edge of the workpiece along an inner wall surface of the guide sleeve until the end face edge of the workpiece abuts against the first pressing surface along a circumferential direction;

[0021] The step of bringing the end face edge of the workpiece into contact with the second tightening surface comprises: removing the guide sleeve from the mounting surface, inserting one end of the workpiece into the oil sealing structure of the deep hole drilling machine, and moving the end face edge of the workpiece along the second tightening surface until the end face edge of the workpiece abuts against the second tightening surface in the circumferential direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the deep hole drilling machine oil sealing structure of the embodiment of the present invention when clamping a φ240mm workpiece;

[0023] Figure 2 This is a schematic diagram of the structure of an oil sealing plate according to an embodiment of the present invention;

[0024] Figure 3 It is a cross-sectional schematic diagram of the deep hole drilling machine oil sealing structure of the embodiment of the present invention when clamping a φ240mm workpiece;

[0025] Figure 4 It is a cross-sectional schematic diagram of the deep hole drilling machine oil sealing structure when clamping a φ300mm workpiece according to an embodiment of the present invention;

[0026] Figure 5 The figure is a schematic diagram of the installation of the guide sleeve of the oil sealing structure of the deep hole drilling machine according to the embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1. Clamping table; 11. Second mounting hole; 12. Concave stopper; 2. Oil sealing plate; 21. First tightening surface; 22. Second tightening surface; 23. Mounting surface; 24. First mounting hole; 25. Fastener; 26. Convex stopper; 27. Annular surface; 28. Threaded hole; 3. Guide sleeve; 4. Tool bar; 5. Workpiece; 51. Chamfer. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0030] The Z axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the X axis in the drawings represents the horizontal direction, and is designated as the front and back position, and the positive direction of the X axis represents the front side, and the reverse direction of the X axis represents the back side; the Y axis in the drawings represents the left and right position, and the positive direction of the Y axis represents the left side, and the reverse direction of the Y axis represents the right side. It should also be noted that the aforementioned Z axis, Y axis, and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0032] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0033] The present invention provides a deep hole drilling machine oil sealing structure, a deep hole drilling machine and a workpiece clamping method, wherein the oil sealing structure has better versatility and can improve the processing efficiency of the workpiece.

[0034] like Figure 1 and Figure 2 As shown, an oil sealing structure for a deep hole drilling machine provided by an embodiment of the present invention includes a clamping table 1 and an oil sealing plate 2, wherein the oil sealing plate 2 is installed at the end of the clamping table 1, and the inner wall of the oil sealing plate 2 is provided with a conical first tightening surface 21 and a conical second tightening surface 22, wherein the second tightening surface 22 is located on the side of the first tightening surface 21 away from the clamping table 1, and the diameters of the first tightening surface 21 and the second tightening surface 22 gradually increase in the direction away from the clamping table 1, respectively, and the small end diameter of the second tightening surface 22 is larger than the large end diameter of the first tightening surface 21, and the first tightening surface 21 and the second tightening surface 22 are respectively used to abut against the end face edges of workpieces 5 with different outer diameters.

[0035] It should be noted that when the clamping table 1 is used in a deep hole drilling machine, the clamping table 1 can be spaced apart from the spindle box of the deep hole drilling machine along the length direction of the deep hole drilling machine, and the clamping table 1 can clamp the workpiece 5 located therebetween together with the spindle box, and the tool bar 4 of the deep hole drilling machine can pass through the clamping table 1 and the oil sealing plate 2, and then extend into the inner hole of the workpiece 5 to process the workpiece 5. Among them, the oil sealing plate 2 can be installed at the end of the clamping table 1 facing the spindle box. In addition, the small end diameter of the second tightening surface 22 refers to the diameter of the smallest diameter end of the second tightening surface 22, that is, the diameter of the end of the second tightening surface 22 close to the first tightening surface 21; the large end diameter of the first tightening surface 21 refers to the diameter of the largest diameter end of the first tightening surface 21, that is, the diameter of the end of the first tightening surface 21 close to the second tightening surface 22. Since the small end diameter of the second pressing surface 22 is larger than the large end diameter of the first pressing surface 21, when the workpiece diameter is within the range of the first pressing surface 21, the end surface edge of the workpiece can be adapted to abut against the first pressing surface 21, for example, Figure 3 , the outer diameter of the φ240mm workpiece is larger than the small end diameter of the first top tightening surface 21 and smaller than the large end diameter of the first top tightening surface 21, so the end face edge of the φ240mm workpiece can be adapted to abut against the first top tightening surface 21; when the workpiece diameter is within the range of the second top tightening surface 22, the end face edge of the workpiece can be adapted to abut against the second top tightening surface 22, for example, refer to Figure 4 The outer diameter of the φ300mm workpiece is larger than the small end diameter of the second top tightening surface 22 and smaller than the large end diameter of the second top tightening surface 22 , so the end face edge of the φ300mm workpiece can be adapted to abut against the second top tightening surface 22 .

[0036] In this embodiment, since the first tightening surface 21 is conical and its diameter gradually increases in the direction away from the clamping table 1, the first tightening surface 21 as a whole will constitute a conical surface with open ends, so that as long as the outer diameter of the workpiece 5 is between the small end diameter and the large end diameter of the first tightening surface 21, the workpiece 5 can be extended into the first tightening surface 21 to tightly abut against the first tightening surface 21 along the circumferential direction, thereby achieving sealing to meet the oil sealing requirement; in addition, since the second tightening surface 22 is conical and its diameter gradually increases in the direction away from the clamping table 1, the second tightening surface 22 as a whole will constitute a conical surface with open ends, so that as long as the outer diameter of the workpiece 5 is between the small end diameter and the large end diameter of the second tightening surface 22, the workpiece 5 can be extended into the second tightening surface 22 to tightly abut against the second tightening surface 22 along the circumferential direction, thereby achieving sealing to meet the oil sealing requirement. Thus, it can meet the oil sealing needs of all specifications of workpieces whose outer diameters are between the small end diameter and the large end diameter of the first tightening surface 21, and can also meet the oil sealing needs of all specifications of workpieces whose outer diameters are between the small end diameter and the large end diameter of the second tightening surface 22, thereby improving the versatility of the oil sealing structure. There is no need to frequently replace the oil sealing plate 2 according to different workpiece outer diameters, which reduces the time consumption for replacement and is beneficial to improving the processing efficiency of the workpiece 5.

[0037] Alternatively, if Figure 2 , Figure 3 and Figure 4 As shown, the inner wall of the oil sealing plate 2 is provided with an annular mounting surface 23, the inner periphery of the mounting surface 23 is connected to the large end edge of the first tightening surface 21, and the outer periphery of the mounting surface 23 is connected to the small end edge of the second tightening surface 22. The oil sealing plate 2 is provided with a first mounting hole 24 which sequentially passes through the end surface of the oil sealing plate 2 close to the clamping platform 1 and the mounting surface 23, and the end of the clamping platform 1 is provided with a second mounting hole 11 axially opposite to the first mounting hole 24. The deep hole drilling machine oil sealing structure also includes a fastener 25 which is sequentially penetrated through the first mounting hole 24 and the second mounting hole 11.

[0038] Specifically, the fastener 25 can be a bolt, which is not limited here.

[0039] In this optional embodiment, by sequentially inserting the fastener 25 into the first mounting hole 24 and the second mounting hole 11, a detachable connection between the oil sealing plate 2 and the clamping platform 1 can be achieved, thereby facilitating the removal and replacement of the oil sealing plate 2 from the clamping platform 1. In addition, since the inner wall of the oil sealing plate 2 is provided with an annular mounting surface 23, and the inner peripheral edge of the mounting surface 23 is connected to the large end edge of the first tightening surface 21, and the outer peripheral edge of the mounting surface 23 is connected to the small end edge of the second tightening surface 22, and the first mounting hole 24 sequentially penetrates the end face and the mounting surface 23 of the clamping platform 1, the first mounting hole 24 can avoid the first tightening surface 21 and the second tightening surface 22 at the penetration point of the inner wall of the oil sealing plate 2, and will not cause damage to the first tightening surface 21 and the second tightening surface 22, which is beneficial to improving the abutment sealing effect between the workpiece 5 and the tightening surface.

[0040] Specifically, the first mounting hole 24, the second mounting hole 11 and the fastener 25 are recorded as fastening structures. A plurality of fastening structures may be provided in the oil sealing structure of the deep hole drilling machine. The plurality of fastening structures may be arranged in sequence and spaced apart along the circumference of the oil sealing plate 2 to improve the connection strength between the oil sealing plate 2 and the clamping table 1. For example, six fastening structures may be provided, and the six fastening structures may be arranged in sequence and spaced apart along the circumference of the oil sealing plate 2.

[0041] Alternatively, if Figure 3 and Figure 4 As shown, a concave stop 12 coaxial with the oil sealing plate 2 is provided at the end of the clamping platform 1 , and a convex stop 26 cooperating with the concave stop 12 is provided on the oil sealing plate 2 .

[0042] Specifically, the female stopper 12 may be a short hole, and the male stopper 26 may be a short cylinder.

[0043] In this optional embodiment, through the above-mentioned setting, the stopper cooperation between the oil sealing plate 2 and the clamping table 1 can be achieved, and the stopper is conducive to ensuring the correct alignment and positioning between the oil sealing plate 2 and the clamping table 1, thereby improving the installation accuracy of the oil sealing plate 2 relative to the clamping table 1.

[0044] Alternatively, if Figure 3 and Figure 4 As shown, the outer wall of the oil sealing plate 2 is provided with an annular surface 27 parallel to the end surface of the oil sealing plate 2 away from the clamping platform 1, and the oil sealing plate 2 is also provided with a threaded hole 28 that sequentially passes through the end surface of the oil sealing plate 2 away from the clamping platform 1 and the annular surface 27, and the threaded hole 28 is used for threaded connection of a top screw.

[0045] Specifically, the top screw piece can be a bolt. It is understandable that, since the threaded hole 28 is provided on the oil sealing plate 2, when the oil sealing plate 2 needs to be removed from the clamping platform 1, the fastener 25 can be removed first, and then the top screw piece can be screwed to the threaded hole 28, and then the top screw piece can be screwed into the clamping platform 1 along the threaded hole 28 until the end of the top screw piece contacts the clamping platform 1, and then the top screw piece can be screwed in. At this time, the top screw piece will drive the oil sealing plate 2 to move away from the clamping platform 1, thereby driving the convex stop 26 to separate from the concave stop 12, and finally the oil sealing plate 2 can be disassembled.

[0046] In this optional embodiment, the convex stop 26 and the concave stop 12 may be stuck to each other during actual use, resulting in the need to apply a large external force for separation. However, in this solution, a threaded hole 28 is provided on the oil sealing plate 2, and the threaded hole 28 sequentially passes through the end surface of the oil sealing plate 2 away from the clamping table 1 and the annular surface 27. Therefore, the operator only needs to screw the top screw into the threaded hole 28 and lightly tighten it to overcome the resistance caused by the stuck stop to achieve the separation of the convex stop 26 and the concave stop 12, thereby making it easier to disassemble the oil sealing plate 2.

[0047] Alternatively, if Figure 5 As shown, the deep hole drilling machine oil sealing structure also includes a guide sleeve 3, which is located in the second tightening surface 22 and is detachably connected to the mounting surface 23, and the inner diameter of the guide sleeve 3 gradually increases in the direction away from the clamping table 1, and the inner diameter of the end of the guide sleeve 3 close to the first tightening surface 21 is equal to the large end diameter of the first tightening surface 21.

[0048] It should be noted that the guide sleeve 3 can be detachably connected to the mounting surface 23 by, for example, bolt connection, which is not limited here.

[0049] It is understandable that if the guide sleeve 3 is not provided, when the outer diameter of the workpiece 5 is between the small end diameter and the large end diameter of the first tightening surface 21, the end face edge of the workpiece 5 needs to abut against the first tightening surface 21, so after one end of the workpiece 5 is inserted into the oil sealing structure of the deep hole drilling machine, it must pass through the second tightening surface 22 and the mounting surface 23 in sequence until it reaches the first tightening surface 21. And because the workpiece 5 must pass through the mounting surface 23, the workpiece 5 may directly abut against the mounting surface 23 during the movement, and the position of the workpiece 5 relative to the oil sealing plate 2 needs to be repeatedly adjusted so that one end of the workpiece 5 can smoothly pass through the mounting surface 23, which will affect the clamping efficiency of the workpiece 5 in the oil sealing structure of the deep hole drilling machine.

[0050] In this optional embodiment, the guide sleeve 3 is additionally provided, and the guide sleeve 3 is located in the second tightening surface 22 and is detachably connected to the mounting surface 23. At the same time, the inner diameter of the guide sleeve 3 gradually increases in the direction away from the clamping table 1, and the inner diameter of the end of the guide sleeve 3 close to the first tightening surface 21 is equal to the large end diameter of the first tightening surface 21. Therefore, when it is necessary to clamp the workpiece 5 whose outer diameter is between the small end diameter and the large end diameter of the first tightening surface 21 in the oil sealing structure of the deep hole drilling machine, one end of the workpiece 5 can be inserted into the guide sleeve 3 first and then the end face edge of the workpiece 5 can be moved along the inner wall surface of the guide sleeve 3. At this time, the end face edge of the workpiece 5 can smoothly enter the first tightening surface 21 along the inner wall surface of the guide sleeve 3, and there will be no situation of contact with the mounting surface 23, thereby avoiding repeated adjustment of the workpiece 5, thereby improving the clamping efficiency of the workpiece 5.

[0051] Alternatively, if Figure 5 As shown, one end of the guide sleeve 3 away from the first pressing surface 21 protrudes from the oil sealing plate 2 along the axial direction of the oil sealing plate 2 .

[0052] In this optional embodiment, through the above-mentioned arrangement, it can be ensured that the end of the guide sleeve 3 is exposed outside the oil sealing plate 2, which is conducive to more accurate insertion of one end of the workpiece 5 into the guide sleeve 3.

[0053] A deep hole drilling machine provided by an embodiment of the present invention includes the deep hole drilling machine oil sealing structure as described above.

[0054] Specifically, the deep hole drilling machine may also include a bed, a spindle box, and a tool bar 4. The spindle box and the clamping table 1 are arranged on the bed at intervals along the length direction of the bed, and the oil sealing plate 2 is located at the end of the clamping table 1 facing the spindle box. The clamping table 1 and the spindle box jointly clamp the workpiece 5 located therebetween. The tool bar 4 passes through the clamping table 1 and the oil sealing plate 2 in sequence from the side of the clamping table 1 away from the spindle box, and then extends into the inner hole of the workpiece 5 to process the workpiece 5. In addition, the clamping table 1 is slidably arranged on the bed along the length direction of the bed to adjust the distance between itself and the spindle box according to the length of the workpiece 5.

[0055] In this embodiment, since the deep hole drilling machine includes the above-mentioned deep hole drilling machine oil sealing structure, it has all the beneficial effects brought by all the embodiments of the above-mentioned deep hole drilling machine oil sealing structure, which will not be described one by one here.

[0056] An embodiment of the present invention provides a workpiece clamping method based on the deep hole drilling machine oil sealing structure as described above, such as Figure 3 and Figure 4 As shown, the workpiece clamping method comprises:

[0057] Step S1 : when the outer diameter of the workpiece 5 is larger than the small end diameter of the first pressing surface 21 and smaller than the large end diameter of the first pressing surface 21 , the end surface edge of the workpiece 5 is brought into contact with the first pressing surface 21 .

[0058] Step S2: when the outer diameter of the workpiece 5 is larger than the small end diameter of the second pressing surface 22 and smaller than the large end diameter of the second pressing surface 22 , the end surface edge of the workpiece 5 is brought into contact with the second pressing surface 22 .

[0059] Among them, step S1 can be specifically referred to Figure 3 For details of step S2, please refer to Figure 4 In step S1, the end face edge of the workpiece 5 is brought into contact with the first top tightening surface 21, and one end of the workpiece 5 can be inserted into the oil sealing structure of the deep hole drilling machine by hoisting so that the end face edge of the workpiece 5 is brought into contact with the first top tightening surface 21 along the circumferential direction. In step S2, the end face edge of the workpiece 5 is brought into contact with the second top tightening surface 22, and one end of the workpiece 5 can be inserted into the oil sealing structure of the deep hole drilling machine by hoisting so that the end face edge of the workpiece 5 is brought into contact with the second top tightening surface 22 along the circumferential direction.

[0060] In this embodiment, when the outer diameter of the workpiece 5 is larger than the small end diameter of the first tightening surface 21 and smaller than the large end diameter of the first tightening surface 21, the end face edge of the workpiece 5 is abutted against the first tightening surface 21 to achieve an adaptive fitting seal between the workpiece 5 and the first tightening surface 21 whose outer diameter is between the small end diameter and the large end diameter of the first tightening surface 21; and when the outer diameter of the workpiece 5 is larger than the small end diameter of the second tightening surface 22 and smaller than the large end diameter of the second tightening surface 22, the end face edge of the workpiece 5 is abutted against the second tightening surface 22 to achieve an adaptive fitting seal between the workpiece 5 and the second tightening surface 22 whose outer diameter is between the small end diameter and the large end diameter of the second tightening surface 22, that is, the sealed clamping of workpieces with different outer diameter specifications at the oil sealing structure of the deep hole drilling machine can be achieved, and there is no need to frequently replace the oil sealing plate 2, which greatly increases the clamping efficiency of the workpiece 5.

[0061] Alternatively, if Figure 3 and Figure 4As shown, when the outer diameter of the workpiece 5 is larger than the small end diameter of the first pressing surface 21 and smaller than the large end diameter of the first pressing surface 21, before the end surface edge of the workpiece 5 is brought into contact with the first pressing surface 21, the method further includes:

[0062] Step S0: machining a chamfer 51 on the end surface edge of the workpiece 5 , and the machining amount of the chamfer 51 is less than the machining allowance of the workpiece 5 .

[0063] Specifically, the angle of the chamfer 51 can be 45° or 30°, which is not limited here. It should also be noted that when the end face edge of the workpiece 5 is processed with a chamfer 51, the edge of the inclined surface formed by the chamfer 51 away from the clamping table 1 can be used as the edge that subsequently abuts against the first top tightening surface 21 or the second top tightening surface 22 for sealing.

[0064] In this optional embodiment, by processing a chamfer 51 on the end face edge of the workpiece 5, a guiding slope can be formed to help the workpiece 5 to be more easily inserted into the oil sealing structure of the deep hole drilling machine, thereby improving the clamping efficiency.

[0065] Alternatively, if Figure 4 and Figure 5 As shown, the method of making the end face edge of the workpiece 5 abut against the first tightening surface 21 includes: installing the guide sleeve 3 on the mounting surface 23, inserting one end of the workpiece 5 into the oil sealing structure of the deep hole drilling machine, and moving the end face edge of the workpiece 5 along the inner wall surface of the guide sleeve 3 until the end face edge of the workpiece 5 abuts against the first tightening surface 21 along the circumferential direction; the method of making the end face edge of the workpiece 5 abut against the second tightening surface 22 includes: removing the guide sleeve 3 from the mounting surface 23, inserting one end of the workpiece 5 into the oil sealing structure of the deep hole drilling machine, and moving the end face edge of the workpiece 5 along the second tightening surface 22 until the end face edge of the workpiece 5 abuts against the second tightening surface 22 along the circumferential direction.

[0066] In this optional embodiment, in the specific step of abutting the end face edge of the workpiece 5 with the first tightening surface 21, the guide sleeve 3 is installed first and then the workpiece 5 is clamped, so that the guide sleeve 3 can provide a guiding effect for the insertion process of the workpiece 5 into the oil sealing structure of the deep hole drilling machine, which can avoid the workpiece 5 from abutting on the mounting surface 23, thereby helping the workpiece 5 to abut against the first tightening surface 21 more easily. In addition, in the specific step of abutting the end face edge of the workpiece 5 with the second tightening surface 22, the guide sleeve 3 is removed first and then the workpiece 5 is clamped, which can prevent the guide sleeve 3 from affecting the normal abutment between the workpiece 5 and the second tightening surface 22.

[0067] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A deep hole drilling machine oil sealing structure, characterized in that: The invention comprises a clamping platform (1) and an oil sealing plate (2), wherein the oil sealing plate (2) is installed at the end of the clamping platform (1), and the inner wall of the oil sealing plate (2) is provided with a conical first tightening surface (21) and a conical second tightening surface (22), wherein the second tightening surface (22) is located on the side of the first tightening surface (21) away from the clamping platform (1), and the diameters of the first tightening surface (21) and the second tightening surface (22) respectively increase gradually in the direction away from the clamping platform (1), and the small end diameter of the second tightening surface (22) is larger than the large end diameter of the first tightening surface (21), and the first tightening surface (21) and the second tightening surface (22) are respectively used for abutting against the end face edges of workpieces (5) with different outer diameters.

2. The deep hole drilling machine oil sealing structure according to claim 1 is characterized in that: The inner wall of the oil sealing plate (2) is provided with an annular mounting surface (23), the inner peripheral edge of the mounting surface (23) is connected to the large end edge of the first pressing surface (21), and the outer peripheral edge of the mounting surface (23) is connected to the small end edge of the second pressing surface (22). The oil sealing plate (2) is provided with a first mounting hole (24) which sequentially passes through the end surface of the oil sealing plate (2) close to the clamping platform (1) and the mounting surface (23), and the end of the clamping platform (1) is provided with a second mounting hole (11) axially opposite to the first mounting hole (24). The deep hole drilling machine oil sealing structure also includes a fastener (25) which is sequentially penetrated through the first mounting hole (24) and the second mounting hole (11).

3. The deep hole drilling machine oil sealing structure according to claim 2 is characterized in that: The end of the clamping platform (1) is provided with a concave stopper (12) coaxial with the oil sealing plate (2), and the oil sealing plate (2) is provided with a convex stopper (26) matching with the concave stopper (12).

4. The deep hole drilling machine oil sealing structure according to claim 3 is characterized in that: The outer wall of the oil sealing plate (2) is provided with an annular surface (27) parallel to the end surface of the oil sealing plate (2) away from the clamping platform (1), and the oil sealing plate (2) is also provided with a threaded hole (28) which passes through the end surface of the oil sealing plate (2) away from the clamping platform (1) and the annular surface (27) in sequence, and the threaded hole (28) is used for threaded connection of a top screw member.

5. The deep hole drilling machine oil sealing structure according to claim 2 is characterized in that: It also includes a guide sleeve (3), which is located in the second tightening surface (22) and is detachably connected to the mounting surface (23), the inner diameter of the guide sleeve (3) gradually increases in the direction away from the clamping platform (1), and the inner diameter of the end of the guide sleeve (3) close to the first tightening surface (21) is equal to the large end diameter of the first tightening surface (21).

6. The deep hole drilling machine oil sealing structure according to claim 5, characterized in that: One end of the guide sleeve (3) away from the first pressing surface (21) protrudes from the oil sealing plate (2) along the axial direction of the oil sealing plate (2).

7. A deep hole drilling machine, characterized in that: It comprises the deep hole drilling machine oil sealing structure as described in any one of claims 1 to 6.

8. A workpiece clamping method based on the deep hole drilling machine oil sealing structure according to any one of claims 1 to 6, characterized in that: The workpiece clamping method comprises: When the outer diameter of the workpiece (5) is larger than the small end diameter of the first pressing surface (21) and smaller than the large end diameter of the first pressing surface (21), the end face edge of the workpiece (5) is brought into contact with the first pressing surface (21); When the outer diameter of the workpiece (5) is larger than the small end diameter of the second pressing surface (22) and smaller than the large end diameter of the second pressing surface (22), the end face edge of the workpiece (5) is brought into contact with the second pressing surface (22).

9. The workpiece clamping method according to claim 8, characterized in that: When the outer diameter of the workpiece (5) is larger than the small end diameter of the first pressing surface (21) and smaller than the large end diameter of the first pressing surface (21), before the end surface edge of the workpiece (5) is brought into contact with the first pressing surface (21), the method further comprises: A chamfer (51) is machined on the end face edge of the workpiece (5), and the machining amount of the chamfer (51) is less than the machining allowance of the workpiece (5).

10. The workpiece clamping method according to claim 8, characterized in that: The step of bringing the end face edge of the workpiece (5) into contact with the first pressing surface (21) comprises: installing a guide sleeve (3) on a mounting surface (23), inserting one end of the workpiece (5) into an oil sealing structure of a deep hole drilling machine, and moving the end face edge of the workpiece (5) along the inner wall surface of the guide sleeve (3) until the end face edge of the workpiece (5) abuts against the first pressing surface (21) along the circumferential direction; The step of bringing the end face edge of the workpiece (5) into contact with the second pressing surface (22) comprises: removing the guide sleeve (3) from the mounting surface (23), inserting one end of the workpiece (5) into the oil sealing structure of the deep hole drilling machine, and moving the end face edge of the workpiece (5) along the second pressing surface (22) until the end face edge of the workpiece (5) is brought into contact with the second pressing surface (22) along the circumferential direction.

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