Tool bit special for deep hole drill and capable of carrying guide sleeve and machine tool

Abstract

The utility model belongs to the technical field of deep hole machining, and particularly relates to a deep hole drill special tool bit capable of carrying a guide sleeve and a machine tool, the deep hole drill special tool bit comprises a tool bit, a tool and the guide sleeve, the lower end face of the tool bit is provided with a mounting groove allowing a tool handle of the tool to be fixedly inserted, and the guide sleeve is provided with a penetrating channel allowing the tool to penetrate. The guide sleeve is connected with an external machine frame so that the guide sleeve can be arranged on the tool in a sliding and sleeving mode, and the guide sleeve is detachably installed at the lower end of the tool bit. The machine tool has the advantages that the manufacturing cost of the machine tool is reduced, the space, occupied by a storage warehouse, of the machine tool is reduced, the time for replacing the tool bit and the guide sleeve is greatly shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of deep hole machining, in particular to a special cutting tool head for a deep hole drill capable of carrying a guide sleeve and a machine tool. Background Technique

[0002] In machining, when the ratio of hole depth to hole diameter is greater than 6 mm, it is called a deep hole. The machining of such holes is particularly difficult, so a special drill bit for machining deep holes, namely a deep hole drill bit, is required.

[0003] Due to the increasing maturity and diversification of machine tool machining technology, there is a trend towards increasing the automation of machine tools and production lines. Generally, vertical deep hole drilling machines equipped with automatic tool change and automatic guide sleeve change functions use two tool magazines, one for storing deep hole drill bits and the other for storing guide sleeves. This vertical deep hole drilling machine with two storage magazines requires two tool magazines to complete the replacement of deep hole drill bits and guide sleeves, resulting in an increase in the manufacturing cost of the machine tool. In addition, in terms of the time for replacing deep hole drill bits and guide sleeves, it takes twice as long as the replacement time of a single tool magazine to complete, greatly reducing the machining efficiency.

[0004] Therefore, the prior art needs to be improved. Content of the Utility Model

[0005] In order to make up for the deficiencies of the prior art, this application proposes a special cutting tool head for a deep hole drill capable of carrying a guide sleeve and a machine tool.

[0006] In the first aspect, the following technical solution is adopted for a special cutting tool head for a deep hole drill capable of carrying a guide sleeve:

[0007] A special cutting tool head for a deep hole drill capable of carrying a guide sleeve includes a cutting tool head, a cutting tool, and a guide sleeve. An installation groove for fixedly inserting the tool shank of the cutting tool is provided on the lower end surface of the cutting tool head. The guide sleeve is provided with a through channel for the cutting tool to pass through. The guide sleeve is connected to an external frame so that the guide sleeve is slidably sleeved on the cutting tool, and the guide sleeve is detachably installed at the lower end of the cutting tool head.

[0008] Preferably, a grub screw is provided on the side wall of the cutting tool head, and the grub screw penetrates into the installation groove and tightly abuts against the tool shank of the cutting tool.

[0009] Preferably, an installation ring groove is formed on a side wall of the installation groove close to the guide sleeve. The notch of the installation ring groove communicates with the notch of the installation groove. A disassembly groove is provided on the side wall of the installation ring groove. The cross section of the disassembly groove is L-shaped. One end of the disassembly groove is arranged parallel to the axis of the installation ring groove, and the other end is arranged perpendicular to the axis of the disassembly groove. The end of the disassembly groove parallel to the axis of the installation ring groove communicates with the notch of the installation ring groove. An installation block is provided on a side surface of the guide sleeve close to the tool bit. The installation block is used for rotatably inserting into a side of the installation ring groove close to the notch. An arc-shaped strip is provided on the side wall of the installation block. The arc-shaped strip is used for inserting into the disassembly groove.

[0010] Preferably, a hemispherical groove is formed at the bottom of the installation groove. The bottom of the installation ring groove is used for abutting against the installation block. An elastic knurled screw is provided on the guide sleeve. The rod part of the elastic knurled screw passes through from a side where the installation block abuts against the bottom of the installation groove. The ball of the rod part of the elastic knurled screw is used for being clamped into the hemispherical groove.

[0011] Preferably, a transition hole is provided on a side of the through hole close to the installation groove. The cross-sectional area of the transition hole is larger than that of the through hole.

[0012] Preferably, a boss is provided on a side of the guide sleeve away from the tool bit. The through hole penetrates through the boss.

[0013] In a second aspect, the following technical solution is adopted for a machine tool:

[0014] A machine tool includes a frame, a spindle box, a tool magazine and a guide sleeve seat. The spindle box is slidably arranged on the frame. The spindle in the spindle box is used for connecting with a tool bit. The tool magazine is arranged on the frame. The tool magazine is used for placing a special deep-hole drill tool bit. The guide sleeve seat is slidably arranged on the spindle box. A fixing ring is provided on the guide sleeve seat. The inner ring of the fixing ring is used for connecting with the guide sleeve so that the guide sleeve slides along the tool axis.

[0015] Preferably, a clamping ring groove is provided on the outer side wall of the guide sleeve. A ball knurled screw is provided on the outer side wall of the fixing ring. The ball of the rod part of the ball knurled screw passes through from the inner side wall of the fixing ring and is clamped into the clamping ring groove.

[0016] Preferably, a flange is provided on a side of the outer side wall of the guide sleeve away from the tool bit. The flange is used for abutting against the lower side surface of the fixing ring.

[0017] Preferably, a notch is provided on the side wall of the flange. A convex block is provided on a side surface of the fixing ring that abuts against the flange. When the flange abuts against the fixing ring, the convex block is inserted into the notch.

[0018] In summary, compared with the prior art, a special drill bit for deep hole drilling with a guide sleeve that can be carried and a machine tool provided in this embodiment, when performing deep hole machining on a workpiece, first lift the spindle box to the tool change position through the machine frame, then move the guide sleeve seat above the spindle end face, that is, the spindle will pass through the fixing ring, and then move the whole drill bit to the spindle end face through the tool magazine. At this time, the spindle will be connected to the drill bit. Then lower the guide sleeve seat so that the marbles on the marble machine screw on the fixing ring are stuck into the clamping ring groove. Then rotate the spindle so that the arc-shaped strip is on the part of the disassembly groove parallel to the axis of the installation groove. Then lower the guide sleeve seat to drive the separation of the guide sleeve and the drill bit. Finally, lower the spindle box so that the bottom end of the guide sleeve is close to the surface of the workpiece, then the tool can perform deep hole machining on the workpiece. In this design method, the drill bit and the guide sleeve are combined, so that the machine tool only needs a single storage library, reducing the manufacturing cost of the machine tool, and reducing the space occupied by the storage library on the machine tool. At the same time, the machine tool uses a single storage library to process the operations of automatically replacing the drill bit and the guide sleeve, greatly shortening the replacement time and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall machine tool in the embodiment of the present application;

[0021] Figure 2 It is another perspective view of the machine tool in the embodiment of the present application;

[0022] Figure 3 It is a cross-sectional view of the special drill bit for deep hole drilling in the embodiment of the present application;

[0023] Figure 4 It is a schematic diagram of the overall drill bit in the embodiment of the present application;

[0024] Figure 5 It is another perspective view of the drill bit in the embodiment of the present application;

[0025] Figure 6 It is a schematic diagram of the guide sleeve in the embodiment of the present application;

[0026] Figure 7 It is another perspective view made to show the bottom structure of the guide sleeve in the embodiment of the present application;

[0027] Figure 8 It is a cross-sectional view of the guide sleeve in the embodiment of the present application;

[0028] Figure 9 Schematic diagram of the fixing ring in the embodiment of the present application;

[0029] Figure 10 During the working process of the machine tool in the embodiment of the present application.

[0030] Explanation of reference numerals: 1, cutting head; 11, mounting groove; 12, machine screw; 13, removal groove; 14, mounting ring groove; 15, hemispherical groove; 2, cutting tool; 3, guide sleeve; 31, through channel; 32, mounting block; 33, arc bar; 34, ball machine screw; 35, transition hole; 36, boss; 37, clamping ring groove; 38, flange; 39, notch; 4, frame; 5, spindle box; 6, tool magazine; 7, guide sleeve seat; 71, fixing ring; 72, convex block. Detailed implementation manners

[0031] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] The embodiment of the present application discloses a special cutting head 1 for deep hole drilling that can carry a guide sleeve 3.

[0033] Refer to Figures 1 to 9, the special drill bit 1 for deep hole drilling includes a drill bit 1, a cutting tool 2 and a guide sleeve 3. Specifically, the tapered part above the drill bit 1, the part for installing the pull stud, and the middle part for being held by the tool arm in the tool magazine 6 are the same as those in the prior art, so they will not be elaborated in this application. An installation groove 11 is formed at the lower end face of the drill bit 1. The cross-section of the installation groove 11 is circular when viewed from the groove opening direction, and the axis direction of the installation groove 11 is vertical. The shank of the cutting tool 2 is adapted to the shape of the installation groove 11 for insertion and installation. In this embodiment, a machine screw 12 is provided on the side wall of the drill bit 1. The machine screw 12 is screwed into the drill bit 1 from the side wall. When the shank of the cutting tool 2 is inserted into the installation groove 11, the machine screw 12 will be in close contact with the side wall of the shank to stably install the cutting tool 2 on the drill bit 1. At the same time, the head of the machine screw 12 can extend into the side wall of the drill bit 1 to make the side wall of the drill bit 1 smoother. The guide sleeve 3 is generally cylindrical. A through channel 31 is provided on the guide sleeve 3. The through channel 31 is coaxially arranged with the guide sleeve 3. The through channel 31 is used for the cutting tool 2 to pass through. The guide sleeve 3 is connected to an external frame 4. Under the action of the external frame 4, the guide sleeve 3 is sleeved on the cutting tool 2 and can slide along the length direction of the cutting tool 2. There is a predetermined clearance tolerance between the guide sleeve 3 and the cutting tool 2 to ensure the straightness of the drilling and the accuracy of the hole. And the guide sleeve 3 is detachably installed at the lower end of the drill bit 1. When it is necessary to play a guiding role through the guide sleeve 3 during processing, the external frame 4 is used to move the guide sleeve 3 away from the drill bit 1 until the guide sleeve 3 moves to a predetermined position.

[0034] Refer to Figures 1 to 8, an installation ring groove 14 is provided on one side of the installation groove 11 near its own notch. The notch of the installation ring groove 14 coincides with the notch of the installation groove 11, and at the same time, the installation ring groove 14 is coaxially arranged with the installation groove 11, so that the installation groove 11 looks like a step as a whole. A removal groove 13 is provided in the side wall of the installation ring groove 14. The removal groove 13 is L-shaped when viewed from the notch direction, that is, one end of the removal groove 13 is perpendicular to the axis of the installation ring groove 14, and the other end is parallel to the axis of the installation ring groove 14, and the end of the removal groove 13 parallel to the axis of the installation ring groove 14 is communicated with the notch of the installation ring groove 14; on the side surface of the guide sleeve 3 close to the installation ring groove 14, an installation block 32 is provided. The installation block 32 is integrally arranged on the guide sleeve 3. The installation block 32 is cylindrical. The bottom of the installation ring groove 14 is used to abut against the installation block 32. An arc-shaped strip 33 is provided on the side wall of the installation block 32. The arc-shaped strip 33 is adapted to the shape of the removal groove 13, that is, the length of the arc-shaped strip 33 is less than the width of the end of the removal groove 13 parallel to the axis of the installation ring groove 14, and the width is the same as the width of the end of the removal groove 13 perpendicular to the axis of the installation ring groove 14, so as to facilitate the arc-shaped strip 33 to be clamped into the removal groove 13. At the same time, in this embodiment, there are two groups of the removal groove 13 and the arc-shaped strip 33, and the two groups of arc-shaped strips 33 are symmetrically arranged at 180°. Therefore, when the guide sleeve 3 needs to be used, rotate the tool head 1 to make the arc-shaped strip 33 rotate to the connection part of the two parts of the removal groove 13, and then directly slide the guide sleeve 3 downward to a predetermined position through the external frame 4, so that the tool head 1 and the guide sleeve 3 are in one-to-one correspondence, which is convenient to use.

[0035] In order to improve the stability of the installation of the guide sleeve 3 on the tool head 1, and at the same time, since the removal groove 13 is provided on the side wall of the installation ring groove 14, a hemispherical groove 15 is provided at the bottom of the installation ring groove 14. There are two hemispherical grooves 15, and the two hemispherical grooves 15 are symmetrically arranged along the axis of the installation ring groove 14. Two elastic machine screws 12 are correspondingly penetrated on the guide sleeve 3. The marbles at the front ends of the two elastic machine screws 12 will protrude from the installation block 32. When the guide sleeve 3 is installed on the tool head 1, the marbles of the two elastic machine screws 12 will be respectively clamped into the two hemispherical grooves 15 to prevent the guide sleeve 3 from rotating by itself and separating from the tool head 1, and further improve the connection stability between the guide sleeve 3 and the tool head 1.

[0036] In this embodiment, a boss 36 is provided on the side surface of the guide sleeve 3 away from the installation block 32. The boss 36 is provided to prevent the bottom of the guide sleeve 3 from contacting the surface of the workpiece during workpiece processing.

[0037] Meanwhile, to facilitate the insertion of the tool 2 through the guide sleeve 3, a transition hole 35 is provided at the front end of the insertion channel 31 of the guide sleeve 3, that is, the transition hole 35 is provided on the side close to the installation groove 11. And from the orifice direction, the cross-sectional area of the transition hole 35 is larger than that of the insertion channel 31, and the transition hole 35 and the insertion channel 31 are connected through a tapered hole. Therefore, when the guide sleeve 3 is sleeved on the tool 2, the tool 2 can be first inserted into the transition hole 35. Since the cross-sectional area of the transition hole 35 is larger than that of the insertion channel 31, the tool 2 can be more conveniently guided into the insertion channel 31.

[0038] The embodiment of the present application also discloses a machine tool.

[0039] Refer to Figures 1 to 9 , the machine tool includes a frame 4, a spindle box 5, a tool magazine 6 and a guide sleeve seat 7. Specifically, the spindle box 5 is slidably arranged on the frame 4, and the spindle in the spindle box 5 is used to connect with the tool head 1 so that the tool head 1 moves in the vertical direction. The tool magazine 6 is arranged on the frame 4 and is arranged on one side of the spindle box 5. The tool magazine 6 is a swing arm type tool magazine 6, and the tool magazine 6 is used for placing the special deep hole drill tool head 1. Through the tool magazine 6, the tool 2 is brought into the spindle to realize the operations of machining and tool changing. The guide sleeve seat 7 is arranged on the spindle box 5, and the guide sleeve seat 7 can slide along the vertical direction on the spindle box 5, and the guide sleeve seat 7 is arranged on the lower side of the spindle. A fixing ring 71 is arranged on the guide sleeve seat 7. The fixing ring 71 is circular. A flange 38 is arranged on the outer side surface of the fixing ring 71. The fixing ring 71 and the guide sleeve seat 7 are fixedly connected through the flange 38 and screws. The inner wall of the fixing ring 71 is used to connect with the guide sleeve 3 so that the guide sleeve 3 moves up and down along the tool 2.

[0040] A plurality of ball machine screws 34 are arranged on the fixing ring 71. The balls at the front ends of the ball machine screws 34 will penetrate into the inner wall of the fixing ring 71, and the plurality of ball machine screws 34 are evenly distributed. And a clamping ring groove 37 is arranged on the side wall of the guide sleeve 3. The clamping ring groove 37 is used for inserting the ball machine screws 34 on the fixing ring 71. After the balls on the ball machine screws 34 are clamped into the clamping ring groove 37, the guide sleeve 3 can be driven to move by the movement of the guide sleeve seat 7.

[0041] A flange 38 is arranged on the outer side wall of the guide sleeve 3. The flange 38 is arranged on the side of the guide sleeve 3 away from the mounting block 32. When the guide sleeve 3 is connected to the guide sleeve seat 7, the flange 38 on the guide sleeve 3 will abut against the lower side of the fixing ring 71, which can prevent the guide sleeve 3 from moving upward during the workpiece machining process.

[0042] In addition, in this embodiment, a convex block 72 is provided on one side of the fixed ring 71 that abuts against the upper flange 38 of the guide sleeve 3, and a notch 39 is provided on the side of the flange 38 of the guide sleeve 3. The shape of the notch 39 is adapted to that of the convex block 72. When the upper flange 38 of the guide sleeve 3 abuts against the fixed ring 71, the convex block 72 will be stuck into the notch 39 of the flange 38. Therefore, when the guide sleeve 3 is reinstalled on the tool head 1, since the main shaft needs to drive the tool head 1 to rotate so that the arc-shaped strip 33 is stuck into the deep part of the removal groove 13, the arrangement of the convex block 72 and the notch 39 can prevent the guide sleeve 3 from rotating together with the tool head 1 when the tool head 1 rotates.

[0043] The machine tool provided by the present utility model, referring to Figures 1 to 10 , when performing deep hole machining on a workpiece, first move the spindle box 5 upward to the tool change position through the machine frame 4, and at the same time move the guide sleeve seat 7 to a position higher than the end face of the main shaft, that is, the main shaft will pass through the fixed ring 71. Then connect the special deep hole drill tool head 1 to the main shaft through the tool arm of the tool magazine 6. Then lower the guide sleeve seat 7 so that the fixed ring 71 abuts against the flange 38 on the guide sleeve seat 7. At this time, the marbles at the front ends of the multiple ball machine screws 34 on the fixed ring 71 will be stuck into the clamping ring groove 37 on the outer side wall of the guide sleeve 3, so that the guide sleeve seat 7 is fixedly connected to the guide sleeve 3. Then rotate the tool head 1 with the main shaft so that the arc-shaped strip 33 on the guide sleeve 3 faces the opening of the removal groove 13. Then lower the guide sleeve seat 7 so that the guide sleeve seat 7 drives the guide sleeve 3 away from the tool head 1 and descends to a predetermined position. Finally, lower the spindle box 5 so that the lower end of the guide sleeve 3 is close to the surface of the workpiece, so that the guide sleeve 3 guides the tool 2 to perform deep hole machining on the workpiece. In this design method, the tool head 1 is connected to the guide sleeve 3. During machining, as long as the tool head 1 and the guide sleeve 3 are synchronously connected to the main shaft through the tool magazine 6, and then the guide sleeve 3 is separated from the tool head 1 by rotating the main shaft and moving the guide sleeve seat 7, so that the machine tool only needs to have a single storage library, reducing the manufacturing cost of the machine tool and the space occupied by the storage library on the machine tool. At the same time, using a single storage library for machining and replacing the tool head 1 and the guide sleeve 3 can shorten the replacement time, thereby improving the production efficiency.

[0044] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A special cutting tool head for deep hole drilling that can carry a guide sleeve, characterized in that: It includes a tool bit, a tool, and a guide sleeve. An installation groove for fixedly inserting the tool shank is provided on the lower end face of the tool bit. The guide sleeve is provided with a through-channel for the tool to pass through. The guide sleeve is connected to an external machine frame so that the guide sleeve is slidably sleeved on the tool, and the guide sleeve is detachably installed at the lower end of the tool bit.

2. The special cutting head for deep hole drilling that can carry a guide sleeve according to claim 1, characterized in that: A setscrew is provided on the side wall of the tool bit. The setscrew penetrates into the installation groove and tightly abuts against the tool shank.

3. The special cutting head for deep hole drills capable of carrying a guide sleeve according to claim 1, characterized in that: An installation ring groove is formed on a side wall of the installation groove close to the guide sleeve. The notch of the installation ring groove communicates with the notch of the installation groove. A disassembly groove is provided on the side wall of the installation ring groove. The cross-section of the disassembly groove is L-shaped. One end of the disassembly groove is arranged parallel to the axis of the installation ring groove, and the other end is perpendicular to the axis of the disassembly groove. The end of the disassembly groove parallel to the axis of the installation ring groove communicates with the notch of the installation ring groove; an installation block is provided on a side face of the guide sleeve close to the tool bit. The installation block is used for rotatably inserting into a side of the installation ring groove close to the notch. An arc-shaped strip is provided on the side wall of the installation block. The arc-shaped strip is used for inserting into the disassembly groove.

4. The special cutting head for deep hole drilling that can carry a guide sleeve according to claim 3, wherein: A hemispherical groove is provided at the bottom of the installation groove. The bottom of the installation ring groove is used for abutting against the installation block. An elastic setscrew is provided on the guide sleeve. The rod part of the elastic setscrew passes through from a side where the installation block abuts against the bottom of the installation groove. The ball of the rod part of the elastic setscrew is used for being clamped into the hemispherical groove.

5. The special cutting head for deep hole drilling capable of carrying a guide sleeve according to claim 1, characterized in that: A transition hole is provided on a side of the through-channel close to the installation groove. The cross-sectional area of the transition hole is larger than the cross-sectional area of the through-channel.

6. The special cutting head for deep hole drill capable of carrying a guide sleeve according to claim 1, wherein: A boss is provided on a side of the guide sleeve far from the tool bit. The through-channel passes through the boss.

7. A machine tool, characterized in that: It includes a machine frame, a spindle box, a tool magazine, and a guide sleeve seat. The spindle box is slidably arranged on the machine frame. The spindle in the spindle box is used for connecting with the tool bit according to any one of claims 1-6. The tool magazine is arranged on the machine frame. The tool magazine is used for placing special deep-hole drill tool bits. The guide sleeve seat is slidably arranged on the spindle box. A fixing ring is provided on the guide sleeve seat. The inner ring of the fixing ring is used for connecting with the guide sleeve so that the guide sleeve slides along the axis of the tool.

8. A machine tool according to claim 7, characterized in that: A clamping ring groove is provided on the outer side wall of the guide sleeve; a ball setscrew is provided on the outer side wall of the fixing ring. The ball of the rod part of the ball setscrew passes through from the inner side wall of the fixing ring and is clamped into the clamping ring groove.

9. A machine tool according to claim 7, characterized in that: A flange is provided on a side of the outer side wall of the guide sleeve far from the tool bit. The flange is used for abutting against the lower side face of the fixing ring.

10. A machine tool according to claim 9, characterized in that: A notch is provided on the side wall of the flange; a convex block is provided on a side face of the fixing ring abutting against the flange. When the flange abuts against the fixing ring, the convex block is inserted into the notch.

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