Cutter module based on bar deep blind hole machining and material core sleeving and taking

Abstract

The invention relates to a tool module based on bar deep blind hole machining and material core sleeving and taking. The tool module comprises an inner tool apron and an outer tool apron arranged on the inner tool apron in a sleeving mode, an elastically movable inner tool assembly is arranged between the inner tool apron and the outer tool apron, and a first blade used for cutting a workpiece is arranged on the outer tool apron; a brake assembly for driving the inner cutter assembly to move is arranged between the inner cutter holder and the outer cutter holder; the cutting ends of the first blade and the inner cutter assembly are located at the outer end of the outer cutter holder and / or the outer end of the inner cutter holder respectively, and the cutting end of the inner cutter assembly has a first state and a second state. The inner cutter assembly and the first blade are distributed on an inner cutter holder and an outer cutter holder in an inner-outer ring manner; the technical problem that in the prior art, the material core cannot be taken out while retracting the tool is effectively solved, and the technical problem that the material core needs to be taken out after retracting the tool is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of deep hole machining, and specifically to a tool module for machining deep blind holes in a bar stock and extracting a core material. Background Art

[0002] After blind hole trepanning, the traditional way to extract the material core is that a fitter uses a wedge-shaped tool to break the core and then take out the core. This method is very inefficient, requires a large trepanning gap, has a low utilization rate of the core material, is prone to damaging the core, and may also damage the machined hole.

[0003] To solve the above technical problems, Chinese Patent No. ZL201921298801.5 discloses a cutting tool for cooperating with blind hole trepanning. It adopts a combined tool shank. The outer tool shank provides power to force the tool bit of the inner tool shank to feed downward along the blade in the vertical groove for cutting. The technical solution adopted by this utility model includes a guide sleeve, an inner tool shank, and an outer tool shank. The outer tool shank is sleeved on the tool shank of the inner tool shank. The push rod of the outer tool shank extends into the groove of the inner tool shank and is arranged in contact with the inclined surface on the cutting blade arranged in the groove of the inner tool shank. The guide sleeve is sleeved on the tool bit of the inner tool shank.

[0004] After cutting the core of the blind hole by this utility model, it is necessary to first retract the tool, and then take out the core, which is not very convenient for taking out the core. In addition, after the trepanning processing is completed by this utility model, the trepanning tool shank is retracted; the cutting blade is placed in the longitudinal groove of the inner tool shank, the guide sleeve is placed on the semi-circle of the inner tool shank, the outer tool shank is sleeved on the inner tool shank, and the push rod on the outer tool shank extends into the transverse groove of the inner tool shank; the tool is fed into the hole; the whole tool rotates including the inner tool shank and the outer tool shank, and the outer tool shank feeds; the processing parameters are a rotational speed of 30 revolutions per minute and a feed rate of 0.1 mm per revolution; the push rod on the outer tool shank contacts the blade, and the inclined surface of the push rod forces the blade to feed downward to start cutting; after cutting is completed, the rotation is stopped, and the outer tool shank is retracted back to the original position. At this time, the blade automatically springs back to the original position under the pressure of the spring; the cutting tool is withdrawn from the inner hole to complete the cutting, that is, after machining the deep blind hole, it is necessary to replace and install the cutting tool to cut the core in the inner hole. The whole process is cumbersome, the production efficiency is low, and there will be a positioning error in the two installations of the tool, which will further affect the machining accuracy.

[0005] Trepanning is a commonly used method in machining, which can obtain both a tube blank and a core material at the same time. The removed core material is further processed as a bar stock. Traditional blind hole trepanning processing usually requires first using trepanning processing for trepanning, and then installing a cutting tool for cutting the material. There will be a positioning error in the two installations, which will further affect the machining accuracy. Such as a cutting tool for cooperating with blind hole trepanning disclosed in Chinese Patent No. ZL201921298801.5 mentioned above.

[0006] Therefore, the present invention designs a set of special tools to realize trepanning of deep blind holes in large-diameter precious metals, which can reduce costs, improve material utilization rate, and improve machining quality.

[0007] Therefore, further improvement is needed. Summary of the Invention

[0008] The purpose of the present invention is to provide a tool module for machining deep blind holes in a bar stock and extracting the core material. After cutting off the core material of the blind hole, the core material can be taken out while retracting the tool, or the core material can be directly taken out before retracting the tool, effectively solving the technical problems that the prior art cannot take out the core material while retracting the tool and that the core material needs to be taken out after retracting the tool first. In addition, there is no need to frequently replace the tool. On the same tool module, it is possible to machine deep blind holes in the bar stock and also cut off the core material in the deep blind hole of the bar stock, overcoming the disadvantages of frequent tool replacement, tooling, low production efficiency, and serious material loss in the above prior art, reducing the tool cost, improving the material utilization rate, and effectively solving the technical problem that positioning errors will occur during two installations of the tool, which will affect the machining accuracy, thereby improving the machining quality and machining accuracy.

[0009] A tool module for machining deep blind holes in a bar stock and extracting the core material designed according to this purpose includes an inner tool holder, an outer tool holder sleeved on the inner tool holder, an inner tool assembly that is elastically movable between the inner tool holder and the outer tool holder, and a first cutting blade for cutting the workpiece is provided on the outer tool holder;

[0010] A braking assembly for driving the inner tool assembly to move is provided between the inner tool holder and the outer tool holder; the cutting ends of the first cutting blade and the inner tool assembly are respectively located at the outer ends of the outer tool holder and / or the inner tool holder, and the cutting end of the inner tool assembly has a first state and a second state; the inner tool assembly and the first cutting blade are arranged in an inner and outer ring distribution between the inner tool holder and the outer tool holder;

[0011] When the first cutting blade and the inner tool assembly move axially along with the inner tool holder and the outer tool holder towards the rotating workpiece, the cutting end of the inner tool assembly is in the first state, and the cutting end of the first cutting blade relatively extends outside the cutting end of the inner tool assembly, so that the cutting end of the first cutting blade first contacts and cuts the workpiece;

[0012] The first blade and the inner blade assembly enter the rotating workpiece together with the inner blade seat and the outer blade seat, and cut the inside of the workpiece to form an inner ring groove and a core. The first blade is located on the inner ring groove, and the inner blade seat is sleeved on the core. The outer blade seat drives the first blade to move axially in the retraction direction and presses the inner blade assembly elastically towards the inner blade seat. The cutting end of the inner blade assembly extends out of the outer end of the first blade under the elastic movement and is in the second state. The cutting end of the inner blade assembly in the second state abuts against the bottom wall of the inner ring groove. When the outer blade seat rotates under the action of an external force and drives the brake assembly to move, the brake assembly drives the inner blade assembly to move during the movement process, so that the cutting end of the inner blade assembly cuts off the core inside the workpiece, thereby separating the workpiece from the core. The cut core abuts against the inner end face of the cutting end of the inner blade assembly. When the inner blade seat and the outer blade seat move axially in the retraction direction, they drive the core to be taken out of the workpiece, and the core is limited in the inner blade seat; or, the core is directly taken out of the workpiece along the inner blade seat when it is cut, effectively solving the technical problems in the prior art that the core cannot be taken out while retracting the tool, and the core needs to be retracted first and then taken out.

[0013] The workpiece processing steps are as follows:

[0014] Place the workpiece on the clamping and fixing disk of the lathe, and install the assembled tool module on the tailstock of the lathe. The workpiece rotates, and the tailstock of the lathe drives the tool module to feed towards the workpiece. The first blade first contacts the workpiece during the axial movement of the tool die. The first blade cuts the workpiece during the axial movement and processes a blind hole with a corresponding depth on the workpiece. After the first blade completes the processing of the workpiece, the outer blade seat drives the first blade to move axially in the retraction direction along the inner blade seat and presses the inner blade assembly. The cutting end of the inner blade assembly extends out. When the inner blade assembly moves circumferentially with the outer blade seat, it cuts off the core inside the workpiece.

[0015] The inner blade assembly has a first state and a second state. The inner blade assembly is telescopically and swingably arranged between the inner blade seat and the outer blade seat. When cutting and processing the blind hole of the workpiece, the inner blade assembly is in the retracted state, and the first blade is used to process and cut the blind hole of the workpiece. After the blind hole of the workpiece is processed, the inner blade assembly is in the extended state and moves circumferentially along the core to separate the core from the workpiece. Finally, the core abuts against the inner side of the cutting end of the inner blade assembly. When retracting the tool, the core can be taken out of the blind hole of the workpiece at the same time, or the core can be directly taken out from the inner blade seat.

[0016] The inner knife assembly includes a second blade rotatably arranged on the outer end face of the outer knife seat. The braking assembly includes a positioning pin arranged on the inner knife seat and an arc-shaped groove arranged on the outer knife seat. The second blade includes a first arc surface, and one end of the positioning pin extends outside the arc-shaped groove. When the outer knife seat drives the second blade to make a circumferential movement relative to the inner knife seat, the arc-shaped groove moves relative to the positioning pin, and the end of the positioning pin extending out of the arc-shaped groove acts on the first arc surface of the second blade to drive the second blade to move on the outer end face of the outer knife seat and make the second blade perform a circumferential cutting movement along the material core. Moreover, when the outer knife seat makes a circumferential movement relative to the inner knife seat, the positioning pin moves relative to the limit on the arc-shaped groove to control the movement displacement of the second blade.

[0017] The inner knife assembly further includes a locking seat cooperatively connected with the outer knife seat, a pushing member cooperatively connected with the second blade, and a spring. The pushing member is arranged inside the locking seat. There is an installation space for accommodating and installing the locking seat and the spring between the outer knife seat and the inner knife seat. The second blade includes a knife rod inserted into the installation space. The spring is sleeved on the outer peripheral side of the knife rod of the second blade. One end of the spring abuts against one end of the pushing member, and the other end of the spring abuts against the inside of the outer knife seat.

[0018] The outer knife seat drives the second blade and the locking seat to move axially and presses the spring and the pushing member to push the pushing member to push out the second blade.

[0019] The pushing member includes a turntable and a push rod. The locking seat is provided with an accommodating cavity for accommodating the turntable and the push rod. The accommodating cavity is provided with a plurality of clamping ribs, and the plurality of clamping ribs are circumferentially distributed and spaced on the accommodating cavity. The turntable is provided with a plurality of first clamping grooves circumferentially distributed and spaced. The push rod is provided with a plurality of second clamping grooves circumferentially distributed and spaced. The turntable is provided with circumferentially distributed first spiral engaging and guiding teeth, and the push rod is provided with circumferentially distributed second spiral engaging and guiding teeth. When the inner knife assembly is in the first state, each first clamping groove and second clamping groove respectively cooperate with the corresponding clamping rib. The first spiral engaging and guiding teeth are engaged with the second spiral engaging and guiding teeth. When the inner knife assembly is switched from the first state to the second state, the locking seat moves axially relative to the push rod, and the push rod abuts against the turntable. When the first spiral engaging and guiding teeth of the turntable abut against the top of the clamping rib, the turntable extends out to push out the second blade.

[0020] The turntable, the push rod, the locking seat, and the spring are equivalent to a pressing and rebounding device to push out the second blade.

[0021] The outer knife seat is provided with a matching groove, and the locking seat is provided with a convex rib that matches the matching groove. The convex rib is embedded in the matching groove. A gasket is provided on the second blade, and one end of the spring abuts against the gasket. When the outer knife seat drives the first blade to move axially in the direction of retraction and presses the inner knife assembly toward the inner knife seat, the outer knife seat drives the locking seat to move axially through the matching groove and the convex rib. The push rod remains in position and abuts against the turntable. The locking rib inside the locking seat gradually disengages from the first locking groove of the turntable. When the turntable disengages from the engagement of the locking rib inside the locking seat, a radial force is generated at the contact between the tip inclined surface of the push rod head and the inclined surface of the turntable to force the turntable to rotate. The first spiral buckle guide tooth of the turntable cooperates with the top of the locking rib in the push rod to push out the second blade; and when the inner knife assembly is driven to move during the movement of the brake assembly, the convex rib limits the movement on the matching groove.

[0022] The inner knife assembly includes a second blade extending from the outer knife seat, the second blade includes a second arc surface, the first blade includes a third arc surface, the inner knife seat and the outer knife seat are in a sleeve-shaped structure, and both the inner knife seat and the outer knife seat are provided with an inner cavity. When the inner knife assembly is in a pending state, the center of the second arc surface of the second blade is M1, the center of the third arc surface of the first blade is M2, the center of the inner cavity of the inner knife seat is M3, and the center of the inner cavity of the outer knife seat is M4. M1, M2, M3, and M4 are all on the same axis.

[0023] The inner knife seat is inserted into the inner cavity of the outer knife seat, and the outer knife seat is provided with an axial hole. The second blade includes a knife rod inserted into the axial hole. When the inner knife assembly is driven to move during the movement of the brake assembly, the knife rod is limited to rotate on the axial hole. When the second blade extends out of the outer end of the outer knife seat, the knife rod moves axially along the axial hole.

[0024] The outer tool holder is provided with a first opening for discharging cutting chips of the workpiece, and the first opening is connected to the inner cavity of the inner tool holder.

[0025] The inner tool holder is provided with a second opening for connecting to the inner cavity of the inner tool holder. The coolant enters the tool module through the second opening to effectively cool the tool module; or, the workpiece cutting chips are discharged from the inner cavity of the inner tool holder through the second opening to avoid the accumulation of cutting chips in the tool mold.

[0026] A number of first inclined blocks are arranged on the inner side of the outer tool holder, and a number of second inclined blocks are arranged on the outer side of the inner tool holder. The inclined surfaces of the first inclined blocks and the second inclined blocks are in opposite directions. When the outer tool holder makes axial movement, the first inclined blocks and the second inclined blocks are used to make a retracting movement along the inner tool holder; or, the outer tool holder drives the inner tool holder to make a forward movement through the first inclined blocks and the second inclined blocks. When the workpiece is rotating and the outer tool holder makes circumferential movement under the action of external force, the first inclined blocks are separated from the corresponding second inclined blocks. The first inclined blocks and the second inclined blocks effectively prevent the cutting chips from being blocked between the outer tool holder and the inner tool holder.

[0027] The external tool holder is driven by the tailstock of the machine tool.

[0028] When the outer tool holder retracts, it can drive the second blade to extend. When the outer tool holder moves circumferentially, it can rotate the second blade.

[0029] Working principle:

[0030] When the tool module performs nesting machining on the workpiece, the pressing and rebounding device at the lower end of the inner tool assembly is in a retracted state. At this time, the first blade extends outward compared to the second blade of the inner tool assembly. When the tool module moves towards the workpiece, the workpiece rotates simultaneously. The outer tool holder cooperates with the inner tool holder through the first inclined block and the second inclined block. When the outer tool holder feeds towards the workpiece, it drives the inner tool holder to move axially along the workpiece simultaneously. The outer tool holder and the inner tool holder move inside the workpiece at the same time. At this time, the first blade cuts an annular notch (inner ring groove) on the workpiece, and the chips are discharged along the opening of the tool module.

[0031] After the blind hole machining is completed, pull the outer tool holder axially outward along the workpiece. The outer tool holder performs an axial retraction movement along the inner tool holder through the first inclined block and the second inclined block. At this time, the outer tool holder drives the first blade and the inner tool assembly to move axially outward along the workpiece. By pressing the push rod of the inner tool holder, the push rod ejects the turntable. When the engagement between the turntable and the locking seat is disengaged, the radial force generated at the contact between the inclined surface tip of the push rod head and the inclined surface of the turntable forces the turntable to rotate. The turntable rotates to the clamping rib of the locking seat. At this time, the second blade is ejected, making the second blade extend outward relative to the first blade.

[0032] Adjust the position of the second blade so that one end face of the second blade contacts the bottom of the blind hole. At this time, the workpiece rotates, and the convex limit movement of the outer tool holder is on the circumferential arc groove. The outer tool holder drives the second blade to rotate circumferentially along the core. The inner tool holder remains stationary. The tip of the second blade touches the positioning pin and moves radially inward under the action of the radial force provided by the positioning pin. The second blade cuts circumferentially along the core, machining a radial notch on the core. Continue to rotate the second blade. When cutting to the center position of the core, the core is separated from the workpiece. At this time, the second blade is at the end position. Move the tool module axially outward. The second blade provides an axial support force for the core and drives the core to move out. After moving out, reset the tool module.

[0033] The beneficial effects of the present invention are as follows:

[0034] The inner tool assembly has a first state and a second state. The inner tool assembly is telescopically and swingably arranged between the inner tool holder and the outer tool holder. When cutting and machining the blind hole of the workpiece, the inner tool assembly is in a retracted state, and the first blade is used to machine and cut the blind hole of the workpiece. After the blind hole of the workpiece is machined, the inner tool assembly is in an extended state and moves circumferentially along the core to separate the core from the workpiece. Finally, the core abuts against the inner side of the cutting end of the inner tool assembly, and the core can be taken out of the blind hole of the workpiece simultaneously during retraction, or the core can be directly taken out from the inner tool holder.

[0035] In addition, there is no need to frequently replace the cutting tools. On the same cutting tool module, it is possible to machine deep blind holes in the bar stock and also cut off the core material inside the deep blind hole of the bar stock, overcoming the disadvantages of frequently replacing cutting tools, tooling, low production efficiency, and serious material loss existing in the above-mentioned prior art. It has the advantages of reducing tooling costs, improving material utilization rate, and effectively solving the technical problem that positioning errors will occur during the two-time installation of cutting tools, thereby affecting the machining accuracy, and further improving the machining quality and machining accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic perspective view of a cutting tool module according to an embodiment of the present invention.

[0037] Figure 2 Schematic perspective sectional view of an outer tool holder of a cutting tool module according to an embodiment of the present invention.

[0038] Figure 3 Schematic perspective view of an inner tool holder and a push rod assembly of a cutting tool module according to an embodiment of the present invention.

[0039] Figure 4 Exploded assembly structure schematic diagram of an inner tool holder and a push rod assembly according to an embodiment of the present invention.

[0040] Figure 5 Schematic perspective view of a locking seat according to an embodiment of the present invention.

[0041] Figure 6 Schematic diagram of a turntable according to an embodiment of the present invention.

[0042] Figure 7 Schematic diagram of a push rod according to an embodiment of the present invention.

[0043] Figure 8 Schematic diagram of the extension of a second cutting blade according to an embodiment of the present invention.

[0044] Figure 9 Schematic diagram of the end position of the movement of a second cutting blade according to an embodiment of the present invention.

[0045] Figure 10 Schematic diagram of machining a blind hole in a workpiece according to an embodiment of the present invention.

[0046] Figure 11 Schematic diagram of cutting and removing the core material according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] The present invention will be further described below in conjunction with the drawings and embodiments.

[0048] Refer to Figures 1-11, a tool module based on processing deep blind holes in a bar stock and extracting the core material, including an inner tool holder 1, an outer tool holder 2 sleeved on the inner tool holder 1. An elastically movable inner tool assembly 3 is provided between the inner tool holder 1 and the outer tool holder 2. A first cutting blade 5 for cutting a workpiece 4 is provided on the outer tool holder 2;

[0049] A braking assembly 6 for driving the movement of the inner tool assembly 3 is provided between the inner tool holder 1 and the outer tool holder 2; The cutting ends of the first cutting blade 5 and the inner tool assembly 3 are respectively located at the outer ends of the outer tool holder 2 and / or the inner tool holder 1. The cutting end of the inner tool assembly 3 has a first state and a second state; The inner tool assembly 3 and the first cutting blade 5 are arranged in an inner and outer ring distribution between the inner tool holder 1 and the outer tool holder 2;

[0050] When the first cutting blade 5 and the inner tool assembly 3 move axially along with the inner tool holder 1 and the outer tool holder 2 towards the rotating workpiece 4, the cutting end of the inner tool assembly 3 is in the first state, and the cutting end of the first cutting blade 5 relatively extends outside the cutting end of the inner tool assembly 3, so that the cutting end of the first cutting blade 5 first contacts and cuts the workpiece 4;

[0051] The first cutting blade 5 and the inner tool assembly 3 enter the rotating workpiece 4 along with the inner tool holder 1 and the outer tool holder 2, and cut and process the inside of the workpiece 4 into an inner ring groove 7 and a core 8; The first cutting blade 5 is located on the inner ring groove 7, and the inner tool holder 1 is sleeved on the core 8; The outer tool holder 2 drives the first cutting blade 5 to move axially in the retracting direction and presses the inner tool assembly 3 elastically towards the inner tool holder 1. The cutting end of the inner tool assembly 3 extends out of the outer end of the first cutting blade 5 under the elastic movement and is in the second state. The cutting end of the inner tool assembly 3 abuts against the bottom wall of the inner ring groove 7 in the second state. When the outer tool holder 2 rotates under the action of an external force and drives the braking assembly 6 to move, the braking assembly 6 drives the inner tool assembly 3 to move during the movement, so that the cutting end of the inner tool assembly 3 cuts off the core 8 inside the workpiece 4, thereby separating the workpiece 4 from the core 8. The cut core 8 abuts against the inner end face of the cutting end of the inner tool assembly 3. When the inner tool holder 1 and the outer tool holder 2 move axially in the retracting direction, they drive the core 8 to be taken out of the workpiece 4, and the core 8 is limited in the inner tool holder 1; Or, the core 8 is directly taken out of the workpiece 4 along the inner tool holder 1 when it is cut off.

[0052] The processing steps of the workpiece 4 are as follows:

[0053] Place the workpiece 4 on the clamping and fixing disc of the lathe, and install the assembled tool module on the tailstock of the lathe. The workpiece 4 rotates, and the tailstock of the lathe drives the tool module to feed towards the workpiece 4. The first cutting blade 5 first contacts the workpiece 4 during the axial movement of the tool die. The first cutting blade 5 cuts the workpiece 4 during the axial movement and processes a blind hole with a corresponding depth on the workpiece 4. After the first cutting blade 5 finishes processing the workpiece 4, the outer tool holder 2 drives the first cutting blade 5 to perform an axial retraction movement along the inner tool holder 1 and presses the inner tool assembly 3. The cutting end of the inner tool assembly 3 extends out, and the inner tool assembly 3 cuts off the core 8 inside the workpiece 4 when performing a circumferential movement with the outer tool holder 2.

[0054] The inner tool assembly 3 includes a second cutting blade 9 rotatably arranged on the outer end face of the outer tool holder 2. The braking assembly 6 includes a positioning pin 10 arranged on the inner tool holder 1 and an arc-shaped groove 11 arranged on the outer tool holder 2. The second cutting blade 9 includes a first arc surface 12, and one end of the positioning pin 10 extends out of the arc-shaped groove 11. When the outer tool holder 2 drives the second cutting blade 9 to perform a circumferential movement relative to the inner tool holder 1, the arc-shaped groove 11 moves relative to the positioning pin 10, and the end of the positioning pin 10 extending out of the arc-shaped groove 11 acts on the first arc surface 12 of the second cutting blade 9 to drive the second cutting blade 9 to move on the outer end face of the outer tool holder 2 and make the second cutting blade 9 perform a circumferential cutting movement along the core 8. Moreover, when the outer tool holder 2 performs a circumferential movement relative to the inner tool holder 1, the positioning pin 10 performs a limiting movement relative to the arc-shaped groove 11 to control the movement displacement of the second cutting blade 9.

[0055] In this embodiment, a connecting shaft is provided on the first cutting blade 5, and the first cutting blade 5 is fixed on the outer tool holder 2 through an external thread on the connecting shaft, so that the first cutting blade 5 is detachably installed on the outer tool holder 2 to facilitate the later replacement or grinding of the first cutting blade 5.

[0056] In this embodiment, the other end of the positioning pin 10 is fixed on the inner tool holder 1.

[0057] The inner tool assembly 3 further includes a locking seat 17 cooperatively connected with the outer tool holder 2, a pushing member cooperatively connected with the second cutting blade 9, and a spring 20. The pushing member is arranged inside the locking seat 17. An installation space 21 for accommodating and installing the locking seat 17 and the spring 20 is provided between the outer tool holder 2 and the inner tool holder 1. The second cutting blade 9 includes a tool rod 16 inserted into the installation space 21. The spring 20 is sleeved on the outer peripheral side of the tool rod 16 of the second cutting blade 9. One end of the spring 20 abuts against one end of the pushing member, and the other end of the spring 20 abuts against the inside of the outer tool holder 2.

[0058] In this embodiment, a pressing gap (spring elastic deformation space) is left between the end faces of the locking seat 17 and the inner tool holder 1 to press the push rod 19. The locking seat 17 is provided with a hole position for inserting the fixed shaft of the push rod 19, and one end of the fixed shaft of the push rod 19 abuts against the end face of the inner tool holder 1.

[0059] The outer blade seat 2 drives the second blade 9 and the locking seat 17 to move axially and pushes the second blade 9 out of the pushing member by pressing the spring 20 and the pushing member.

[0060] The pushing member includes a rotating disk 18 and a push rod 19. The locking seat 17 is provided with a receiving cavity 22 for receiving the rotating disk 18 and the push rod 19. The receiving cavity 22 is provided with a plurality of positioning ribs 23, which are circumferentially distributed and spaced on the receiving cavity 22. The rotating disk 18 is provided with a plurality of circumferentially distributed and spaced first positioning grooves 24, and the push rod 19 is provided with a plurality of circumferentially distributed and spaced second positioning grooves 25. The rotating disk 18 is provided with a circumferentially distributed first spiral buckle guide tooth 26, and the push rod 19 is provided with a circumferentially distributed second The spiral buckle guide teeth 27; when the inner knife assembly 3 is in the first state, each first locking groove 24 and the second locking groove 25 are respectively matched with the corresponding locking rib 23; the first spiral buckle guide teeth 26 are buckled with the second spiral buckle guide teeth 27; when the inner knife assembly 3 switches from the first state to the second state, the locking seat 17 moves axially relative to the push rod 19, and the push rod 19 abuts against the rotating disk 18. When the first spiral buckle guide teeth 26 of the rotating disk 18 abut against the top of the locking rib 23, the rotating disk 18 extends axially to position and push out the second blade 9.

[0061] In this embodiment, a gasket 30 is provided on the blade rod 16 of the second blade 9, one end of the spring 20 abuts against the gasket, the gasket presses the rotating disk 18, and one end of the spring 20 indirectly abuts against the pushing member through the gasket.

[0062] The shank 16 of the second blade 9 is provided with an external thread, and the inner hole of the gasket 30 is provided with an internal thread. The gasket 30 is fixedly sleeved on the shank 16 through the internal and external threads.

[0063] The outer knife seat 2 is provided with a matching groove 28, and the locking seat 17 is provided with a convex rib 29 that matches the matching groove 28. The convex rib 29 is embedded in the matching groove 28. The second blade 9 is provided with a gasket 30, and one end of the spring 20 abuts against the gasket 30. When the outer knife seat 2 drives the first blade 5 to move axially in the direction of retreat and presses the inner knife assembly 3 toward the inner knife seat 1, the outer knife seat 2 drives the locking seat 17 to move axially through the matching groove 28 and the convex rib 29, and the push rod 19 remains in position and abuts against the turntable 18, and the locking seat 1 7, the internal retaining rib 23 gradually disengages from the rotating disk 18. When the first retaining groove 24 of the rotating disk 18 disengages from the meshing position of the retaining rib 23 inside the locking seat 17, the tip inclined surface of the push rod 19 and the inclined surface of the rotating disk 18 generate radial force at the contact point to force the rotating disk 18 to rotate. The first spiral buckling guide tooth 26 of the rotating disk 18 cooperates with the top of the retaining rib in the push rod 19 to push out the second blade 9; and when the brake assembly 6 drives the inner knife assembly 3 to move during the movement, the convex rib 29 limits the movement on the matching groove 28.

[0064] ​The inner cutter assembly 3 includes a second blade 9 extending from the outer cutter seat 2. The second blade 9 includes a second arc surface 13, and the first blade 5 includes a third arc surface 14. The inner cutter seat 1 and the outer cutter seat 2 are in a sleeve-like structure, and both the inner cutter seat 1 and the outer cutter seat 2 are provided with inner cavities. When the second blade 9 is in the undetermined state of the inner cutter assembly 3, the center of the second arc surface 13 of the second blade 9 is M1, the center of the third arc surface 14 of the first blade 5 is M2, the center of the inner cavity of the inner cutter seat 1 is M3, and the center of the inner cavity of the outer cutter seat 2 is M4. M1, M2, M3, and M4 are all on the same axis.

[0065] The inner cutter seat 1 is inserted into the inner cavity of the outer cutter seat 2. The outer cutter seat 2 is provided with a shaft hole 15, and the second blade 9 includes a cutter bar 16 inserted into the shaft hole 15. When the braking assembly 6 drives the inner cutter assembly 3 to move during the movement process, the cutter bar 16 is rotationally limited on the shaft hole 15. When the second blade 9 extends out of the outer end of the outer cutter seat 2, the cutter bar 16 moves axially along the shaft hole 15.

[0066] The outer cutter seat 2 is provided with a first opening for discharging the cutting chips of the workpiece 4, and the first opening communicates with the inner cavity of the inner cutter seat 1.

[0067] The inner cutter seat 1 is provided with a second opening for communicating with the inner cavity of the inner cutter seat 1, and the coolant enters the tool module along the second opening; or, the cutting chips of the workpiece 4 are discharged out of the inner cavity of the inner cutter seat 1 along the second opening.

[0068] A plurality of first inclined blocks 31 are provided on the inner side of the outer cutter seat 2, and a plurality of second inclined blocks 32 are provided on the outer side of the inner cutter seat 1. The inclined surface directions of the first inclined blocks 31 and the second inclined blocks 32 are opposite. When the outer cutter seat 2 moves axially, it makes a retracting movement along the inner cutter seat 1 through the first inclined blocks 31 and the second inclined blocks 32; or, the outer cutter seat 2 drives the inner cutter seat 1 to make a feeding movement through the first inclined blocks 31 and the second inclined blocks 32; when the workpiece 4 is in a rotating state and the outer cutter seat 2 makes a circumferential movement under an external force, the first inclined blocks 31 are disengaged from the corresponding second inclined blocks 32.

[0069] In this embodiment, a plurality of first inclined blocks 31 are circumferentially and spacedly arranged on the inner side of the outer cutter seat 2; a plurality of second inclined blocks 32 are circumferentially and spacedly arranged on the outer side of the inner cutter seat 1;

[0070] In the initial position (when the tool module is in an undetermined state), each first inclined block 31 and each second inclined block 32 are in one-to-one correspondence (aligned). When making a circumferential movement, the first inclined block 31 will be disengaged from the corresponding second inclined block 32.

[0071] The above is the preferred embodiment of the present invention, which 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 by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A tool module for machining deep blind holes in bar materials and for sleeving material cores, comprising an inner tool holder (1) and an outer tool holder (2) sleeved on the inner tool holder (1), characterized in that: An elastically movable inner knife assembly (3) is provided between the inner knife seat (1) and the outer knife seat (2), and a first blade (5) for cutting a workpiece (4) is provided on the outer knife seat (2); A brake assembly (6) for driving the inner knife assembly (3) to move is provided between the inner knife seat (1) and the outer knife seat (2); the cutting ends of the first blade (5) and the inner knife assembly (3) are respectively located at the outer end of the outer knife seat (2) and / or the inner knife seat (1), and the cutting end of the inner knife assembly (3) has a first state and a second state; the inner knife assembly (3) and the first blade (5) are arranged in an inner and outer circle distribution on the inner knife seat (1) and the outer knife seat (2); When the first blade (5) and the inner blade assembly (3) move axially with the inner blade holder (1) and the outer blade holder (2) toward the rotating workpiece (4), the cutting end of the inner blade assembly (3) is in a first state, and the cutting end of the first blade (5) extends relatively outside the cutting end of the inner blade assembly (3), so that the cutting end of the first blade (5) first contacts and cuts the workpiece (4); The first blade (5) and the inner knife assembly (3) enter the rotating workpiece (4) along with the inner knife seat (1) and the outer knife seat (2), and cut the inside of the workpiece (4) into an inner ring groove (7) and a material core (8); the first blade (5) is located on the inner ring groove (7), and the inner knife seat (1) is sleeved on the material core (8); the outer knife seat (2) drives the first blade (5) to perform axial movement in the direction of knife withdrawal and presses the inner knife assembly (3) toward the inner knife seat (1) for elastic movement, and the cutting end of the inner knife assembly (3) extends out of the outer end of the first blade (5) under the elastic movement and is in a second state, and the cutting end of the inner knife assembly (3) abuts against the inner ring groove (7) in the second state. On the bottom wall, the outer knife seat (2) rotates under the action of external force and drives the brake assembly (6) to move. During the movement of the brake assembly (6), the inner knife assembly (3) is driven to move, so that the cutting end of the inner knife assembly (3) cuts off the material core (8) inside the workpiece (4), thereby separating the workpiece (4) and the material core (8). The cut material core (8) abuts against the inner end surface of the cutting end of the inner knife assembly (3). When the inner knife seat (1) and the outer knife seat (2) move axially in the direction of retraction, the material core (8) is driven to be taken out of the workpiece (4), and the material core (8) is limited in the inner knife seat (1); or, when cutting, the material core (8) is directly taken out of the workpiece (4) along the inner knife seat (1); The processing steps of workpiece (4) are as follows: The workpiece (4) is placed on a clamping plate of a lathe, and the assembled tool module is installed on the tailstock of the lathe. The workpiece (4) rotates, and the tailstock of the lathe drives the tool module to feed toward the workpiece (4). The first blade (5) first contacts the workpiece (4) during the axial movement of the tool module. The first blade (5) cuts the workpiece (4) during the axial movement and processes a blind hole of a corresponding depth on the workpiece (4). After the first blade (5) completes the processing of the workpiece (4), the outer tool holder (2) drives the first blade (5) to move along the inner tool holder (1) to withdraw the tool axially, and presses the inner tool assembly (3). The cutting end of the inner tool assembly (3) extends out, and the inner tool assembly (3) cuts off the material core (8) in the workpiece (4) while moving circumferentially with the outer tool holder (2).

2. According to claim 1, the tool module for machining deep blind holes in bar materials and sleeving material cores is characterized in that: The inner blade assembly (3) comprises a second blade (9) rotatably arranged on the outer end surface of the outer blade seat (2); the brake assembly (6) comprises a positioning pin (10) arranged on the inner blade seat (1) and an arc groove (11) arranged on the outer blade seat (2); the second blade (9) comprises a first arc surface (12); one end of the positioning pin (10) extends out of the arc groove (11); when the outer blade seat (2) drives the second blade (9) to make a circumferential motion relative to the inner blade seat (1), the arc groove (11) moves relative to the inner blade seat The positioning pin (10) moves, and one end of the positioning pin (10) extending out of the arc groove (11) acts on the first arc surface (12) of the second blade (9) to drive the second blade (9) to move on the outer end surface of the outer blade seat (2), and make the second blade (9) perform circumferential cutting movement along the material core (8). When the outer blade seat (2) performs circumferential movement relative to the inner blade seat (1), the positioning pin (10) performs relative limiting movement on the arc groove (11) to control the movement displacement of the second blade (9).

3. According to claim 2, the tool module for machining deep blind holes in bar materials and sleeving material cores is characterized in that: The inner blade assembly (3) further comprises a locking seat (17) connected to the outer blade seat (2), and a pushing member and a spring (20) connected to the second blade (9); the pushing member is arranged in the locking seat (17); an installation space (21) for accommodating and installing the locking seat (17) and the spring (20) is arranged between the outer blade seat (2) and the inner blade seat (1); the second blade (9) comprises a blade rod (16) inserted into the installation space (21); the spring (20) is sleeved on the outer peripheral side of the blade rod (16) of the second blade (9); one end of the spring (20) abuts against one end of the pushing member, and the other end of the spring (20) abuts against the inside of the outer blade seat (2); The outer blade seat (2) drives the second blade (9) and the locking seat (17) to move axially and pushes the pushing member out of the second blade (9) through the pressing spring (20) and the pushing member.

4. The tool module for machining deep blind holes in bar materials and sleeving material cores according to claim 3 is characterized in that: The pushing member comprises a rotating disk (18) and a push rod (19); the locking seat (17) is provided with a receiving cavity (22) for receiving the rotating disk (18) and the push rod (19); the receiving cavity (22) is provided with a plurality of positioning ribs (23), and the plurality of positioning ribs (23) are circumferentially distributed and spaced apart on the receiving cavity (22); the rotating disk (18) is provided with a plurality of first positioning grooves (24) circumferentially distributed and spaced apart, and the push rod (19) is provided with a plurality of second positioning grooves (25) circumferentially distributed and spaced apart; the rotating disk (18) is provided with a circumferentially distributed first spiral buckle guide tooth (26), and the push rod (19) is provided with a circumferentially distributed second spiral buckle guide tooth (26). The inner blade assembly (3) is in the first state, each of the first locking groove (24) and the second locking groove (25) is respectively matched with the corresponding locking rib (23); the first spiral locking guide tooth (26) is locked with the second spiral locking guide tooth (27); when the inner blade assembly (3) is switched from the first state to the second state, the locking seat (17) moves axially relative to the push rod (19), and the push rod (19) abuts against the rotating disk (18), and when the first spiral locking guide tooth (26) of the rotating disk (18) abuts against the top end of the locking rib (23), the rotating disk (18) extends axially to position and push out the second blade (9).

5. The tool module for machining deep blind holes in bar materials and sleeving material cores according to claim 4, characterized in that: The outer knife seat (2) is provided with a matching groove (28), and the locking seat (17) is provided with a convex rib (29) matching with the matching groove (28). The convex rib (29) is embedded in the matching groove (28). The second blade (9) is provided with a gasket (30). One end of the spring (20) abuts against the gasket (30). When the outer knife seat (2) drives the first blade (5) to move axially in the direction of retreating and presses the inner knife assembly (3) toward the inner knife seat (1), the outer knife seat (2) drives the locking seat (17) to move axially through the matching groove (28) and the convex rib (29). The push rod (19) remains in position and abuts against the rotating disk (18). The locking seat The internal retaining rib (23) of the rotating disk (18) gradually disengages from the meshing position of the first retaining groove (24) of the rotating disk (18) and the retaining rib (23) inside the locking seat (17). When the meshing position of the first retaining groove (24) of the rotating disk (18) and the retaining rib (23) inside the locking seat (17) is disengaged, a radial force is generated at the contact point between the tip inclined surface of the head of the push rod (19) and the inclined surface of the rotating disk (18) to force the rotating disk (18) to rotate. The first spirally engaged guide tooth (26) of the rotating disk (18) cooperates with the top end of the retaining rib in the push rod (19) to push out the second blade (9); and when the braking assembly (6) drives the internal knife assembly (3) to move during movement, the convex rib (29) limits the movement on the matching groove (28).

6. The tool module for machining deep blind holes in bar materials and sleeving material cores according to claim 1, characterized in that: The inner blade assembly (3) comprises a second blade (9) extending from the outer blade seat (2), the second blade (9) comprises a second curved surface (13), the first blade (5) comprises a third curved surface (14), the inner blade seat (1) and the outer blade seat (2) are in a sleeve-shaped structure, and the inner blade seat (1) and the outer blade seat (2) are both provided with an inner cavity, when the second blade (9) is in a pending state of the inner blade assembly (3), the center of the second curved surface (13) of the second blade (9) is M1, the center of the third curved surface (14) of the first blade (5) is M2, the center of the inner cavity of the inner blade seat (1) is M3, and the center of the inner cavity of the outer blade seat (2) is M4, and M1, M2, M3, and M4 are all on the same axis.

7. The tool module for machining deep blind holes in bar materials and sleeving material cores according to claim 4, characterized in that: The inner blade seat (1) is inserted into the inner cavity of the outer blade seat (2), and the outer blade seat (2) is provided with an axial hole (15). The second blade (9) includes a blade rod (16) inserted into the axial hole (15); when the brake assembly (6) drives the inner blade assembly (3) to move during movement, the blade rod (16) is limitedly rotated on the axial hole (15), and when the second blade (9) extends out of the outer end of the outer blade seat (2), the blade rod (16) moves axially along the axial hole (15).

8. The tool module for machining deep blind holes in bar materials and sleeving material cores according to claim 1, characterized in that: The outer tool holder (2) is provided with a first opening for discharging cutting chips of the workpiece (4), and the first opening is connected to the inner cavity of the inner tool holder (1).

9. The tool module for machining deep blind holes in bar materials and sleeving material cores according to claim 1, characterized in that: The inner tool holder (1) is provided with a second opening for communicating with the inner cavity of the inner tool holder (1), and the coolant enters the tool module through the second opening; or the cutting chips of the workpiece (4) are discharged outside the inner cavity of the inner tool holder (1) through the second opening.

10. The tool module for machining deep blind holes in bar materials and sleeving material cores according to claim 1, characterized in that: A plurality of first inclined blocks (31) are arranged on the inner side of the outer tool seat (2), and a plurality of second inclined blocks (32) are arranged on the outer side of the inner tool seat (1). The inclined surfaces of the first inclined blocks (31) and the second inclined blocks (32) are in opposite directions. When the outer tool seat (2) makes an axial movement, it makes a retracting movement along the inner tool seat (1) through the first inclined blocks (31) and the second inclined blocks (32); or, the outer tool seat (2) drives the inner tool seat (1) to make an advancing movement through the first inclined blocks (31) and the second inclined blocks (32). When the workpiece (4) is in a rotating state, when the outer tool seat (2) makes a circumferential movement under the action of an external force, the first inclined blocks (31) are separated from the corresponding second inclined blocks (32).

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