Deep hole forming milling cutter assembly with detachable extension bar

Abstract

The invention relates to the technical field of milling cutters, in particular to a deep hole forming milling cutter assembly with a detachable extension bar, which comprises a milling cutter, a spiral long groove is arranged outside the milling cutter, and a handle ring is fixedly arranged at the upper end of the milling cutter; chip guide holes are formed in the handle ring and the top of the spiral long groove; a connecting assembly is arranged at the top of the handle ring and comprises an outer cover, the outer cover is rotationally connected with the handle ring, a long handle is arranged on the inner wall of the outer cover, and the long handle is fixedly connected with the top of the milling cutter; an extension assembly is connected to the end, away from the milling cutter, of the long handle and comprises a receding ring which is inserted into the inner wall of the end, away from the milling cutter, of the outer cover. Through cooperation of the screw and the first threaded hole, it can be guaranteed that the screw and the long handle are always in a locked state in the process that the milling cutter rotates in one direction, meanwhile, the drilling depth of the milling cutter is increased, the threaded rod can be connected with the first threaded hole and the second threaded hole, the screw can be conveniently connected in, and the machining precision is improved. Therefore, the deep hole can be smoothly processed.

Description

Technical Field

[0001] The invention relates to the technical field of milling cutters, in particular to a deep hole forming milling cutter assembly with a detachable extension rod. Background Art

[0002] A milling cutter is a rotary tool with one or more teeth used for milling. During operation, each tooth cuts off the excess of the workpiece in sequence and intermittently. Milling cutters are mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines. Deep hole forming thread milling cutters are tools with high efficiency for specific deep hole processing.

[0003] In the prior art, the patent with the announcement number CN218476061U discloses a multifunctional vertical milling cutter, which adopts a detachable countersink milling cutter and a drilling milling cutter, so that the milling cutter can be replaced according to the countersink size, and the upper and lower parts of the hole to be processed can be expanded and milled at the same time, so as to process the countersink of the appropriate size, which can reduce the processing time and improve the work efficiency. However, in the actual production and processing process, when the deeper hole is punched from top to bottom, the metal chips generated in the process of drilling the vertical hole will fall to the bottom of the hole due to the effect of gravity, and more metal chips will accumulate at the bottom of the hole. In the process of processing, more metal chips will produce friction with the milling cutter, so that the temperature in the hole rises faster. When the depth of the hole is deep, the above patent needs to pull out the milling cutter, replace the new drilling handle, and then reinstall the cutter head for use, and the operation process is relatively cumbersome. Summary of the invention

[0004] In response to the problems in the prior art, the present invention provides a deep hole forming milling cutter assembly with a detachable extension rod, which can be assembled and extended according to the depth of the hole. The assembly is convenient and quick through the setting of a connecting assembly and an extension assembly. The group connection of the extension assembly can ensure that the milling cutter can extend to a preset depth. At the same time, it can also remove metal chips generated during the processing in the hole, avoiding the phenomenon that all the metal chips are accumulated in the hole.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a deep hole forming milling cutter assembly with a detachable extension rod, comprising a milling cutter, the outer portion of the milling cutter is provided with a spiral long groove, and the upper end of the milling cutter is fixedly provided with a handle ring; A chip guide hole is left at the top of the handle ring and the spiral long groove; a connecting component is arranged at the top of the handle ring, and the connecting component includes an outer cover, the outer cover is rotatably connected to the handle ring, and a long handle is arranged on the inner wall of the outer cover, and the long handle is fixedly connected to the top of the milling cutter; An extension component is connected to the end of the long handle away from the milling cutter, and the extension component includes a clearance ring, which is inserted into the inner wall of the end of the outer cover away from the milling cutter. The end of the clearance ring away from the outer cover is fixedly connected to an extension sleeve, and a soft spiral disk is rotatably arranged in the extension sleeve.

[0006] Specifically, the diameter of the long handle is smaller than the diameter of the milling cutter, the outer wall of the long handle is fixedly connected with an extended spiral disk, the extended spiral disk is placed on the inner wall of the outer cover, and the extended spiral disk contacts the inner wall of the outer cover. Specifically, a first threaded hole is provided in the middle of one end of the long handle away from the milling cutter, an outer platform is provided on the outside of the long handle, an inner sleeve hole is provided in the middle of the outer platform, and the long handle is fixedly connected to the inner sleeve hole.

[0007] Specifically, a plug-in half ring is arranged in the middle of the outer wall of the inner sleeve hole, the outer platform contacts the inner wall of the outer cover through the plug-in half ring, and the outer wall of the plug-in half ring is arranged smoothly.

[0008] Specifically, a sealing ring is fixedly connected to the outer wall of the yield ring, and an outer elastic sleeve is provided on the outer side of the connection end between the outer cover and the extension sheath; A screw rod matched with the first threaded hole is arranged in the middle of the bottom of the soft spiral disk.

[0009] Specifically, the top fixing sleeve of the extension sleeve is provided with a connecting plate, and the middle part of the connecting plate is provided with a collecting box.

[0010] Specifically, a second threaded hole identical to the first threaded hole is opened in the middle of one end of the soft spiral disk away from the yield ring, a threaded rod is threadedly connected in the second threaded hole, and one end of the threaded rod away from the second threaded hole is fixedly connected to a fixing seat.

[0011] Specifically, a guide rail is fixedly connected to one side of the fixing seat close to the connecting plate, a sliding plate is slidably arranged in the middle of the guide rail, a clamping spring is fixedly connected to one side of the sliding plate, and the other end of the clamping spring is fixedly connected to the inner wall of the guide rail.

[0012] Specifically, a side of the sliding plate close to the connecting disk is rotatably connected to a rotating wheel, and the rotating wheel contacts the inner wall of the connecting disk.

[0013] Beneficial effects of the present invention: 1) The extension assembly can be connected to the connection assembly during deep hole processing, and the extension assembly can be connected in multiple groups. The connection process is convenient and quick, thereby ensuring that the milling cutter can reach a preset depth. The cooperation between the screw rod and the first threaded hole can ensure that the screw rod and the long handle are always in a locked state during the rotation of the milling cutter in one direction, and at the same time, the drilling depth of the milling cutter is increased. The first threaded hole and the second threaded hole are exactly the same. The threaded rod can be connected to the first threaded hole and the second threaded hole, so that when drilling a deep hole, the screw rod can be easily connected, thereby ensuring that the deep hole can be processed smoothly; 2) When the milling cutter completely enters the hole, the outer cover will also enter the inside of the hole. At this time, the outer cover will contact the inner wall of the hole due to friction and will not continue to rotate. At this time, the metal chips in the spiral long groove on the side wall of the milling cutter will enter the handle ring through the chip guide hole. At this time, the extended spiral disk placed inside the outer cover rotates relative to the outer cover during the rotation process. At this time, the internal metal chips will push the metal chips placed in the handle ring upward during the rotation process, avoiding the accumulation of metal chips in the hole and ensuring the stability of the drilling process; 3) The rotating wheel will rotate along the inner wall of the connecting disk to ensure the stability of the connecting disk. The collection box is placed in the middle of the connecting disk. When the metal chips are transported to the middle of the connecting disk, they will fall into the collection box due to the centrifugal force for temporary collection and storage; 4) The metal chips in the spiral groove on the side wall of the milling cutter will enter the handle ring through the chip guide hole. At this time, the extended spiral disk placed inside the outer cover rotates relative to the outer cover during the rotation process. At this time, the internal metal chips will push the metal chips in the handle ring upward during the rotation process, avoiding the accumulation of metal chips in the hole and ensuring the stability of the drilling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 An exploded view of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the milling cutter of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the extended spiral disk of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the outer platform of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the soft spiral disk of the present invention; Figure 7 is a position diagram of the connection disk of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the structure at point B in the middle.

[0016] In the figure: 1. connecting component; 10. outer cover; 11. outer elastic sleeve; 12. extended spiral disk; 13. first threaded hole; 14. outer platform; 15. plug-in half ring; 16. inner sleeve hole; 17. long handle; 2. extension component; 25. extension sleeve; 22. yield ring; 23. sealing ring; 24. soft spiral disk; 3. milling cutter; 31. spiral long groove; 32. handle ring; 34. chip guide hole; 4. fixed seat; 41. threaded rod; 42. guide rail; 43. slide; 44. tightening spring; 45. rotating wheel; 5. collection box; 6. connecting disk. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] Example: Figure 1-Figure 8 As shown, a deep hole forming milling cutter assembly with a detachable extension rod of the present invention comprises a milling cutter 3, a spiral long groove 31 is arranged on the outside of the milling cutter 3, and a handle ring 32 is fixedly arranged on the upper end of the milling cutter 3; A chip guide hole 34 is left at the top of the handle ring 32 and the spiral long groove 31; a connecting assembly 1 is provided at the top of the handle ring 32, and the connecting assembly includes an outer cover 10, the outer cover 10 is rotatably connected to the handle ring 32, and a long handle 17 is provided on the inner wall of the outer cover 10, and the long handle 17 is fixedly connected to the top of the milling cutter 3; The end of the long handle 17 away from the milling cutter 3 is connected to the extension component 2, and the extension component 2 includes a clearance ring 22. The clearance ring 22 is inserted into the inner wall of the end of the outer cover 10 away from the milling cutter 3. The end of the clearance ring 22 away from the outer cover 10 is fixedly connected to an extension sleeve 25, and a soft spiral disk 24 is rotatably arranged inside the extension sleeve 25.

[0019] The extension component 2 can be quickly assembled and connected with the connection component 1 through the arrangement, and multiple groups of extension components 2 can also be assembled and connected to increase the extension length of the milling cutter 3, ensuring that the milling cutter 3 can drill a hole of a preset depth.

[0020] The milling cutter 3 rotates and slowly pushes the milling cutter 3 toward the workpiece to drill a hole in the workpiece. Before the outer cover 1 enters the hole, the outer cover 1 rotates with the milling cutter 3. The chips generated at the beginning of drilling will move upward along the spiral groove 31. When moving to the surface of the workpiece, they will be thrown out to the surface of the workpiece due to centrifugal force. When the milling cutter 3 completely enters the hole, the outer cover 1 will also enter the inside of the hole. At this time, the outer cover 1 will contact the inner wall of the hole due to friction and will not continue to rotate. At this time, the metal chips in the spiral groove 31 on the side wall of the milling cutter 3 will enter the handle ring 32 through the chip guide hole 34. At this time, the extended spiral disk 12 placed inside the outer cover 1 rotates relative to the outer cover 1 during the rotation. At this time, the internal metal chips will push the metal chips placed in the handle ring 32 upward during the rotation to avoid metal chips from accumulating in the hole, thereby ensuring stability during the drilling process.

[0021] By extending the spiral disk 12 , the chips can be pushed upward during the rotation, thereby avoiding the accumulation of metal chips and increasing the drilling depth of the milling cutter 3 .

[0022] Specifically, a first threaded hole 13 is formed in the middle of one end of the long handle 17 away from the milling cutter 3 , an outer platform 14 is formed outside the long handle 17 , an inner socket hole 16 is formed in the middle of the outer platform 14 , and the long handle 17 is fixedly connected to the inner socket hole 16 .

[0023] The cooperation between the screw and the first threaded hole 13 can ensure that the screw and the long handle 17 are always in a locked state during the rotation of the milling cutter 3 in one direction, and at the same time increase the drilling depth of the milling cutter 3. At this time, the bottom of the soft spiral disk 24 will contact the upper surface of the outer platform 14 in the outer cover 1, and the yield ring 22 will extend into the outer elastic sleeve 11, and the connection between the outer cover 1 and the extension sleeve 25 is sealed through the outer elastic sleeve 11, so as to prevent iron chips from leaking out of the connection between the outer cover 1 and the extension sleeve 25, and ensure that the metal chips can be quickly transported out.

[0024] Specifically, a plug-in half ring 15 is provided in the middle of the outer wall of the inner sleeve hole 16, the outer platform 14 contacts the inner wall of the outer cover 1 through the plug-in half ring 15, and the outer wall of the plug-in half ring 15 is smoothly provided.

[0025] During the rotation of the long handle 17, the outer platform 14 will also rotate accordingly. The metal chips placed on the upper surface will continue to be transported upward during the rotation of the soft spiral disk 24. The arrangement of the plug-in half ring 15 can prevent the metal chips from falling from the gap between the outer platform 14 and the outer cover 1.

[0026] Specifically, a sealing ring 23 is fixedly connected to the outer wall of the yield ring 22 , and an outer elastic sleeve 11 is sleeved on the outer side of the connecting end between the outer cover 1 and the extension sheath 25 .

[0027] The clearance ring 22 will extend into the outer elastic sleeve 11 and seal the connection between the outer cover 1 and the extension sleeve 25 through the outer elastic sleeve 11 to prevent iron filings from leaking out of the connection between the outer cover 1 and the extension sleeve 25 .

[0028] Specifically, a screw rod matched with the first threaded hole 13 is arranged in the middle of the bottom of the soft spiral disk 24 .

[0029] The bottom of the soft spiral disk 24 will contact the upper surface of the outer platform 14 in the outer cover 1, and can play the role of conveying metal chips when rotating. At the same time, the screw can also be connected to the first threaded hole 13, so as to increase the depth of the hole punched by the milling cutter 3. The disassembly and assembly processes are relatively convenient and quick, and the assembly efficiency can be guaranteed.

[0030] Specifically, a top fixed sleeve of the extension sleeve 25 is provided with a connection plate 6 , and a collection box 5 is provided in the middle of the connection plate 6 .

[0031] The collecting box 5 is placed in the middle of the connecting plate 6. When the metal chips are transported to the middle of the connecting plate 6, they will fall into the collecting box 5 due to the centrifugal force for temporary collection and storage.

[0032] Specifically, a second threaded hole identical to the first threaded hole 13 is opened in the middle of the end of the soft spiral disk 24 away from the yield ring 22, a threaded rod 41 is threadedly connected in the second threaded hole, and a fixing seat 4 is fixedly connected to the end of the threaded rod 41 away from the second threaded hole.

[0033] The first threaded hole 13 and the second threaded hole are completely the same, and the threaded rod 41 can be connected to the first threaded hole 13 and the second threaded hole, so that the screw rod can be easily inserted when drilling a deep hole.

[0034] Specifically, a guide rail 42 is fixedly connected to one side of the fixing seat 4 close to the connecting plate 6 , a slide 43 is slidably provided in the middle of the guide rail 42 , a clamping spring 44 is fixedly connected to one side of the slide 43 , and the other end of the clamping spring 44 is fixedly connected to the inner wall of the guide rail 42 .

[0035] A side of the sliding piece 43 close to the connecting disk 6 is rotatably connected to a rotating wheel 45 , and the rotating wheel 45 contacts the inner wall of the connecting disk 6 .

[0036] During the rotation of the fixed seat 4, the connecting disk 6 will not rotate with it. At this time, the rotating wheel 45 arranged on the side of the fixed seat 4 will rotate along the inner wall of the connecting disk 6 under the push of the clamping spring 44, thereby ensuring the stability of the connecting disk 6. The collecting box 5 is placed in the middle of the connecting disk 6. When the metal chips are transported to the middle of the connecting disk 6, they will fall into the collecting box 5 due to the centrifugal force for temporary collection and storage. The guide rail 42 can play a guiding role, and the slide 43 can slide along the guide rail 42, thereby driving the rotating wheel 45 to move. The rotating wheel 45 can be pressed against the inner wall of the connecting disk 6 during the movement.

[0037] Working principle: When drilling, first clamp the fixing seat 4 on the processing machine, align the milling cutter 3 with the processing part of the workpiece, and drive the fixing seat 4 to rotate through the processing machine to drive the threaded rod 41 to rotate. In the initial state, the threaded rod 41 can be threadedly connected with the first threaded hole 13 set at the end of the long handle 17. The long handle 17 is rotated by the rotation of the threaded rod 41, and then the milling cutter 3 is driven to rotate and slowly pushed toward the workpiece to drill the workpiece. Before the outer cover 1 enters the drilling hole, the outer cover 1 will rotate with the milling cutter 3. The debris generated at the beginning of drilling will be transported upward along the spiral long groove 31. When the milling cutter 3 moves to the surface of the workpiece, it will be thrown out to the surface of the workpiece due to the centrifugal force. When the milling cutter 3 completely enters the hole, the outer cover 1 will also enter the inside of the hole. At this time, the outer cover 1 will contact with the inner wall of the hole due to the friction force and will not continue to rotate. At this time, the metal chips in the spiral long groove 31 on the side wall of the milling cutter 3 will enter the handle ring 32 through the chip guide hole 34. At this time, the extended spiral disk 12 placed inside the outer cover 1 rotates relative to the outer cover 1 during the rotation process. At this time, the internal metal chips will push the metal chips placed in the handle ring 32 upward during the rotation process, so as to avoid the accumulation of metal chips in the hole and ensure the stability of the drilling process.

[0038] When the milling cutter 3 enters the hole to a certain depth, the threaded rod 41 is rotated in the opposite direction to separate from the first threaded hole 13. At this time, the screw arranged at the bottom of the soft spiral disk 24 is rotated and tightened with the first threaded hole 13. The cooperation between the screw and the first threaded hole 13 can ensure that the screw and the long handle 17 are always in a locked state during the rotation of the milling cutter 3 in one direction, and the drilling depth of the milling cutter 3 is also increased. At this time, the bottom of the soft spiral disk 24 will contact the upper surface of the outer platform 14 in the outer cover 1, and the yield ring 22 will extend into the outer elastic sleeve 11, and the connection between the outer cover 1 and the extension sleeve 25 is sealed through the outer elastic sleeve 11 to prevent iron chips from leaking from the connection between the outer cover 1 and the extension sleeve 25, so as to ensure that the metal chips can be quickly transported out.

[0039] During the rotation of the soft spiral disk 24 and the extended spiral disk 12, the metal chips are pushed into the collection box 5 near the side of the fixed seat 4 for collection. One end of the connecting disk 6 is sleeved on the outer wall of the extended sleeve 25. During the rotation of the fixed seat 4, the connecting disk 6 will not rotate with it. At this time, the rotating wheel 45 arranged on the side of the fixed seat 4 will rotate along the inner wall of the connecting disk 6 under the push of the tightening spring 44 to ensure the stability of the connecting disk 6. The collection box 5 is placed in the middle of the connecting disk 6. When the metal chips are transported to the middle of the connecting disk 6, they will fall into the collection box 5 due to the action of centrifugal force for temporary collection and storage.

[0040] During the rotation of the long handle 17, the outer platform 14 will also rotate accordingly. The metal chips placed on the upper surface will continue to be transported upward during the rotation of the soft spiral disk 24. The arrangement of the plug-in half ring 15 can prevent the metal chips from falling from the gap between the outer platform 14 and the outer cover 1.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A deep hole forming milling cutter assembly with a detachable extension rod, comprising a milling cutter (3), characterized in that: The milling cutter (3) is provided with a spiral long groove (31) on the outside, and a handle ring (32) is fixedly provided on the upper end of the milling cutter (3); A chip guide hole (34) is provided at the top of the handle ring (32) and the spiral long groove (31); a connecting assembly (1) is provided at the top of the handle ring (32), and the connecting assembly comprises an outer cover (10), the outer cover (10) is rotatably connected to the handle ring (32), and a long handle (17) is provided on the inner wall of the outer cover (10), and the long handle (17) is fixedly connected to the top of the milling cutter (3); The end of the long handle (17) away from the milling cutter (3) is connected to an extension component (2), and the extension component (2) comprises a clearance ring (22). The clearance ring (22) is inserted into the inner wall of the end of the outer cover (10) away from the milling cutter (3). The end of the clearance ring (22) away from the outer cover (10) is fixedly connected to an extension sleeve (25), and a soft spiral disk (24) is rotatably arranged in the extension sleeve (25).

2. The deep hole forming milling cutter assembly according to claim 1, characterized in that: The diameter of the long handle (17) is smaller than the diameter of the milling cutter (3); an extension spiral disk (12) is fixedly connected to the outer wall of the long handle (17); the extension spiral disk (12) is placed on the inner wall of the outer cover (10), and the extension spiral disk (12) is in contact with the inner wall of the outer cover (10).

3. The deep hole forming milling cutter assembly according to claim 2, characterized in that: A first threaded hole (13) is provided in the middle of one end of the long handle (17) away from the milling cutter (3), an outer platform (14) is provided outside the long handle (17), an inner sleeve hole (16) is provided in the middle of the outer platform (14), and the long handle (17) is fixedly connected to the inner sleeve hole (16).

4. The deep hole forming milling cutter assembly according to claim 3, characterized in that: A plug-in half ring (15) is provided in the middle of the outer wall of the inner sleeve hole (16), the outer platform (14) contacts the inner wall of the outer cover (10) through the plug-in half ring (15), and the outer wall of the plug-in half ring (15) is smoothly arranged.

5. The deep hole forming milling cutter assembly according to claim 3, characterized in that: The outer wall of the clearance ring (22) is fixedly connected with a sealing ring (23), and the connecting end between the outer cover (10) and the extension sheath (25) is externally sleeved with an outer elastic sleeve (11); A screw rod matching the first threaded hole (13) is arranged in the middle of the bottom of the soft spiral disk (24).

6. The deep hole forming milling cutter assembly according to claim 4, characterized in that: The top fixing sleeve of the extension sleeve (25) is provided with a connection plate (6), and the middle part of the connection plate (6) is provided with a collection box (5).

7. The deep hole forming milling cutter assembly according to claim 5, characterized in that: A second threaded hole identical to the first threaded hole (13) is formed in the middle of one end of the soft spiral disk (24) away from the yield ring (22); a threaded rod (41) is threadedly connected in the second threaded hole; and a fixing seat (4) is fixedly connected to one end of the threaded rod (41) away from the second threaded hole.

8. The deep hole forming milling cutter assembly according to claim 7, characterized in that: A guide rail (42) is fixedly connected to one side of the fixing seat (4) close to the connection plate (6); a sliding plate (43) is slidably provided in the middle of the guide rail (42); a pressing spring (44) is fixedly connected to one side of the sliding plate (43); and the other end of the pressing spring (44) is fixedly connected to the inner wall of the guide rail (42).

9. The deep hole forming milling cutter assembly according to claim 8, characterized in that: A side of the sliding plate (43) close to the connecting plate (6) is rotatably connected to a rotating wheel (45), and the rotating wheel (45) is in contact with the inner wall of the connecting plate (6).

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