CN115609029B - Inner taper hole processing cutter - Google Patents
Inner taper hole processing cutter Download PDFInfo
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- CN115609029B CN115609029B CN202110805619.XA CN202110805619A CN115609029B CN 115609029 B CN115609029 B CN 115609029B CN 202110805619 A CN202110805619 A CN 202110805619A CN 115609029 B CN115609029 B CN 115609029B
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- 238000003754 machining Methods 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims description 12
- 230000007423 decrease Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 210000004907 gland Anatomy 0.000 description 9
- 238000003825 pressing Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
Abstract
The invention discloses an inner taper hole machining cutter, which comprises a lower cutter holder, an inner taper hole cutter bar, an upper cutter holder and a profiling wheel, wherein the lower cutter holder is provided with a plurality of grooves; one side of the upper tool apron is movably connected with the lower tool apron through a guide mechanism, so that the upper tool apron can move relative to the lower tool apron; the inner taper hole cutter bar and the profiling wheel are fixed at the other side of the upper cutter holder at intervals along the line; the inner taper hole cutter bar comprises a cutter bar and a blade; the cutter bar is an L-shaped rod body formed by a cross bar fixed in the cutter bar mounting frame and a vertical bar integrally formed with the cross bar; the blade is fixed at the bottom of the vertical rod and is close to one side of the profiling wheel, the blade side of the blade extends out of the cutter bar towards the profiling wheel, and the inclination angle of the blade side is consistent with the inclination angle of the hole wall of the target inner taper hole; the profiling wheel comprises a wheel shaft and a wheel body; one end of the wheel shaft is fixed on the upper tool apron base body, and the other end of the wheel shaft is rotatably fixed in a central hole of the wheel body through two bearings; the inner taper hole processing cutter can realize one-step forming of the inner taper hole type groove, and the stability, the processing precision and the uniformity of the cutter holder meet the process requirements.
Description
Technical Field
The invention relates to the technical field of manufacturing of steel pipes for conveying petroleum and natural gas, in particular to a cutter for machining inner conical holes.
Background
The outer diameter of the bent pipe for conveying petroleum and natural gas is the same as that of the main pipe, and the bent pipe is about 2-5mm thicker than the main pipe, so that a step exists on the inner wall of the bent pipe after the main pipe is welded, the step affects the normal flow of fluid, the abrasion of a welded part can be aggravated, the abrasion of the welded part is reduced in order to counteract the influence of the step on the flow of fluid, and the current equal-weight pipeline such as a ZhongRudong line requires that the inner wall of the pipe end of the bent pipe adopts a groove in the form of an inner taper hole, so that the wall thickness of the welded part of the bent pipe and the main pipe is kept consistent. The original tool apron and the tool bar of the factory can not realize the processing of the bevel in the form of an inner taper hole, and the inner taper hole and the outer bevel are formed by one-step processing, and the inner taper hole can not be trimmed after being formed, so that the requirements on processing precision and processing uniformity are higher. The original cutter holder structure and form cannot process the inner taper hole type groove as shown in figure 1, namely, a groove B with an inner taper hole type is processed on the inner wall of the pipe end A; therefore, in order to develop the processing of the bevel of this type, it is necessary to develop a special tool for processing the inner bevel.
Disclosure of Invention
The invention aims to provide an inner cone hole machining tool for improving machining precision of a chamfering tool apron and realizing one-step forming of machining an outer groove and an inner cone angle.
For this purpose, the technical scheme of the invention is as follows:
An inner taper hole machining tool adopts an outer profiling mode to realize machining of a taper hole in a pipe body; the inner taper hole machining cutter comprises a lower cutter holder, an inner taper hole cutter bar, an upper cutter holder and a profiling wheel. Wherein, the lower tool apron is arranged on a rotary flower disc of the chamfering machine; one side of the upper tool apron is movably connected with the lower tool apron through a guide mechanism, so that the upper tool apron can move along a linear direction relative to the lower tool apron; the inner taper hole cutter bar and the profiling wheel are fixed at the other side of the upper cutter holder at intervals along the line; the inner taper hole cutter bar comprises a cutter bar and a blade; the cutter bar is an L-shaped rod body and is composed of a cross bar arranged and fixed in a cutter bar mounting frame of the upper cutter holder and a vertical bar integrally formed with the cross bar; the length of the vertical rod is matched with the machining length of the taper hole in the pipe body, a mounting groove which is matched with the shape and the size of the blade is formed in the bottom of the vertical rod and is inwards concave near to the rod surface on one side of the profiling wheel, the blade is fixed in the mounting groove, the blade side of the blade extends to the outer side of the cutter rod towards the profiling wheel, and the inclination angle of the blade side is consistent with the inclination angle of the hole wall of the target taper hole; the profiling wheel comprises a wheel shaft and a wheel body; the wheel axle is vertically arranged, and the top end of the wheel axle is fixed on the upper tool apron base body through threads; the wheel body is rotatably fixed at the bottom end of the wheel shaft through two bearings and is formed by integrally forming an upper cylinder and a lower cone; the outer diameter of the lower cone gradually decreases from top to bottom, and the horizontal distance of the conical surface part of the lower cone is matched with the profiling amount.
Further, the lower tool apron comprises a positioning rod arranged on the lower tool apron base body, a locking nut arranged on the positioning rod, an adjusting threaded pipe and a disc spring assembly; the positioning rod is horizontally arranged above the lower cutter holder base body, the rear end of the positioning rod is connected with a first positioning plate fixed on one side of the lower cutter holder base body, the front end of the positioning rod is arranged in an adjusting screw hole formed in the center of an adjusting plate positioned on the other side of the lower cutter holder base body in a penetrating manner, and the disc spring assembly is sleeved on the outer side of the positioning rod and is arranged between the first positioning plate and the adjusting plate; the adjusting threaded pipe and the locking nut are sleeved on the positioning rod sequentially from the front end of the positioning rod; the adjusting threaded pipe is an external threaded pipe with one end provided with an external hexagonal end, external threads of the adjusting threaded pipe are matched with internal threads of the adjusting screw hole, and the threaded end of the adjusting threaded pipe is propped against the end face of the disc spring component; one end of the lock nut is propped against the end face of the outer hexagonal end of the adjusting threaded pipe and is fixedly connected with the positioning rod through threads; the upper cutter holder is movably connected with the upper cutter holder through a guide mechanism and can move along the axial direction of the positioning rod, and the upper cutter holder comprises an upper cutter holder base body and a cutter bar mounting frame; the cutter bar mounting frame and the profiling wheel are arranged on the central line of the plate surface on one side of the upper cutter holder base body at intervals along the axial direction of the positioning rod; the cutter bar mounting frame is a hollow cuboid frame body with an opening towards the profile modeling wheel side, and a jacking bolt is respectively arranged on one side plate surface in three directions.
Further, the guide mechanism is two linear guide mechanisms symmetrically arranged between the lower cutter seat and the upper cutter seat; each linear guide mechanism consists of a linear guide rail pair and a sliding block, and the sliding block is arranged in a slideway of the linear guide rail pair and can move along the axial direction of the linear guide rail pair; the two linear guide rail pairs are fixed on the upper tool apron in a mode that the axes of the two linear guide rail pairs are parallel to the positioning rod, and the two sliding blocks are correspondingly fixed on the lower tool apron.
Further, the disc spring assembly is composed of 20-30 pairs of disc springs, each pair of disc springs is composed of two disc springs which are installed oppositely, and the maximum profiling quantity of the disc spring assembly can reach 45mm.
Further, each disc spring has an arc-shaped structure with a thickness of 2.5mm.
Further, the positioning rod is composed of a screw rod part positioned at the front side and an optical axis part positioned at the rear side; the disc spring assembly, the first positioning plate and the adjusting plate are sleeved outside the optical axis part, and the adjusting threaded pipe and the locking nut are sleeved outside the screw rod part.
Further, second positioning plates and guide blocks are symmetrically arranged on the other side plate surface of the upper tool apron base body along the axial direction of the positioning rod; the second locating plate is sleeved outside the locating rod through a central hole in the second locating plate and is located between the disc spring assembly and the first locating plate, and the guide block is matched with the adjusting plate through a through groove formed in the guide block, so that when the upper tool apron moves relative to the lower tool apron, the adjusting plate moves along the axial direction in the through groove of the guide block.
Further, a knife pad and a knife pressing block are respectively arranged below and above the knife blade, so that the knife blade and the knife pad are arranged in the mounting groove, the knife pressing block is pressed on the knife blade, and the knife blade is fixed in the mounting groove through a fifth screw assembled between the knife pressing block and the vertical rod.
Further, two locking plates are symmetrically arranged between the upper tool apron and the linear guide rail pair; the locking plate is formed by integrally forming a first horizontal plate, a vertical plate and a second horizontal plate which are sequentially connected, so that the axial section of the locking plate is 匚 A ; the two locking plates are symmetrically arranged at two sides of the upper cutter holder and the linear guide rail pair, two ends of the upper cutter holder and the linear guide rail pair are arranged in the through grooves of the two locking plates, and the locking plates are respectively fixed on the side edges of the upper cutter holder through a fastening bolt assembled on the vertical plate; the length of the vertical plate of the locking plate is matched with the thicknesses of the upper cutter seat and the side end of the linear guide rail pair, so that the lower end face of the first horizontal plate and the upper end face of the second horizontal plate of the locking plate are respectively pressed and matched on the top face of the side end of the upper cutter seat and the bottom face of the side end of the linear guide rail pair.
Further, the length of the vertical rod of the cutter bar is matched with the machining length of the taper hole in the pipe body.
Further, a plurality of mounting holes are symmetrically formed at the edges of two sides of the lower tool apron base body, so that the lower tool apron is mounted on a rotary flower disc of the chamfering machine through fixing bolts which are arranged in the mounting holes in a one-to-one correspondence mode.
The inner taper hole processing cutter mainly comprises a lower cutter holder which is relatively fixed, an upper cutter holder which can move relative to the lower cutter holder, and an inner taper hole cutter bar and a profiling wheel which are arranged at the bottom side of the upper cutter holder in structural design; specifically, the profiling wheel and the cutter bar with the inner taper hole are arranged in a right opposite way, so that profiling errors caused by overlarge spacing between the profiling wheel and the cutter bar are eliminated; the cutter bar is designed to be L-shaped, so that the rigidity of the cutter bar is ensured, and meanwhile, the problem of cutter vibration caused by poor rigidity when the original cutter bar is in a hook shape is solved; the disc spring assemblies with a certain number are arranged on the upper tool apron and used as a floating mechanism, so that the floating amount of the tool apron is effectively increased, and profiling can be performed when the ovality deviation is large; the two linear guide mechanisms are additionally arranged between the upper cutter seat and the lower cutter seat, so that the directionality of relative movement is ensured, and the installation mode of the linear guide mechanisms is relatively improved, so that the maintenance is convenient; the wheel shaft 1 is arranged on the upper tool apron 4 by adopting threads, so that the gap between the wheel shaft and the upper tool apron is larger, and the problem of frequent chip plugging is solved.
Compared with the prior art, the motion mechanism of the inner taper hole machining tool is relatively simple, the probability of equipment failure is effectively reduced, the requirement of one-step forming of the inner taper hole type groove can be met, the stability of the tool apron is improved, meanwhile, the machining precision and uniformity meet the process requirement, and the grinding amount after forming is obviously reduced.
Drawings
FIG. 1 is a schematic view of a partial structure of a pipe end in the form of an internal taper;
FIG. 2 (a) is a schematic structural view of the inner cone hole machining tool of the present invention;
FIG. 2 (b) is a side view of the inner cone hole machining tool of the present invention;
FIG. 3 is a schematic view of the structure of the lower tool holder body of the lower tool holder of the inner cone hole machining tool of the present invention;
FIG. 4 is a schematic view of the structure of the lower seat of the inner cone hole machining tool of the present invention;
FIG. 5 (a) is a front view of the inner cone cutter bar of the inner cone cutter of the present invention;
FIG. 5 (b) is a bottom view of the inner cone cutter bar of the inner cone cutter of the present invention;
FIG. 6 is a schematic structural view of an upper seat of the inner cone hole machining tool of the present invention;
FIG. 7 is a schematic view of the profile wheel of the inner cone hole machining tool of the present invention;
FIG. 8 is a schematic view of the structure of a linear guide pair of the inner cone hole machining tool of the present invention;
fig. 9 is a schematic structural view of a locking plate of the inner cone hole machining tool of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and specific examples, which are in no way limiting.
As shown in fig. 2 (a) and 2 (b), the inner taper hole processing cutter comprises a lower cutter holder 1, an inner taper hole cutter bar 3, an upper cutter holder 4, a profile wheel 5 and two linear guide mechanisms 6; the linear guide mechanism 6 is composed of a linear guide rail pair 6a and a slide block 6b, wherein the slide block 6b is arranged in a slideway of the linear guide rail pair 6a and can move along the axial direction of the linear guide rail pair 6 a; wherein,
As shown in fig. 4, the lower tool holder 1 includes a positioning rod 1a, a lock nut 1b, an adjusting screw pipe 1c, a lower tool holder base 1d, a disc spring assembly 1e, and a first positioning plate 1f; in particular, the method comprises the steps of,
As shown in fig. 3 and 4, the lower tool holder base 1d is formed by integrally molding a first square table horizontally arranged and a second square table horizontally and centrally arranged on the first square table, so that the longitudinal section of the lower tool holder base 1d is in a 'convex' shape; two linear guide mechanism mounting grooves 1i are symmetrically formed in the two sides of the top surface of the second square table along the long side direction of the second square table, and an adjusting plate 1j is vertically fixed at the edge of one side of the second square table between the two linear guide mechanism mounting grooves 1 i; an adjusting screw hole is formed in the center of the adjusting plate 1j, and the axial direction of the adjusting screw hole is parallel to the axial directions of the two linear guide mechanism mounting grooves 1 i;
Three axial mounting holes 1h are uniformly distributed on the first square table at two sides of the second square table along the long side direction of the first square table, so that the lower tool apron 1 can be mounted on a rotary flower disc of a chamfering machine through six fixing bolts 2 which are arranged in the mounting holes 1h in a one-to-one correspondence manner.
As shown in fig. 4, the first positioning plate 1f is disposed parallel to the adjustment plate 1j and is fixed to the side wall of the second square table by two first screws 1g disposed at intervals on the lower side of the first positioning plate 1 f; a locating rod mounting hole is formed in the upper side plate surface of the first locating plate 1f, and the central axis of the locating rod mounting hole coincides with the central axis of the adjusting screw hole;
The disc spring assembly 1e is composed of 20-30 pairs of disc springs; wherein, the single disc spring is of an arc structure, and the thickness of the single disc spring is 2.5mm; each pair of disc springs are installed oppositely, and the maximum profiling quantity provided is 1.5mm, so that the maximum profiling quantity provided by the whole disc spring assembly 1e reaches 45mm;
The positioning rod 1a is a cylindrical rod, one side of the positioning rod is a light shaft part, the other side of the positioning rod is an M16 screw rod part with external threads machined on the outer wall, and the external threads are matched with the internal threads of the lock nut 1 b; a first annular boss is arranged on the outer wall of the optical axis part end side of the positioning rod 1a, and the outer diameter of the first annular boss is larger than the aperture of the positioning rod mounting hole; the end side of the screw part of the positioning rod 1a sequentially passes through a positioning rod mounting hole on the first positioning plate 1f, a central hole of the second positioning plate 4b, a central hole of the disc spring assembly 1e, an adjusting screw hole on the adjusting plate 1j, a central hole of the adjusting threaded pipe 1c and a central hole of the locking nut 1b, so that the positioning rod 1a is arranged above the lower tool apron base 1d in a manner parallel to the top surface of the lower tool apron base 1d, and one side end surface of a first annular boss on the positioning rod 1a abuts against the outer side plate surface of the first positioning plate 1 f;
the adjusting threaded pipe 1c is an external threaded pipe with an external hexagonal end, the central hole of the adjusting threaded pipe is a unthreaded hole, and the aperture of the external hexagonal end is smaller than that of the threaded pipe part; the external threaded pipe is inserted into the adjusting screw hole and matched with the internal thread of the adjusting screw hole, and the threaded end of the external threaded pipe abuts against one end face of the disc spring component 1 e; when the adjusting device is used, the outer hexagonal end of the adjusting threaded pipe 1c is adjusted by using a wrench to rotate, the threaded end of the adjusting threaded pipe extends out or retracts relative to the adjusting plate, and the threaded end is kept to be abutted against one end face of the disc spring assembly 1e, so that the tightness of the adjusting disc spring assembly 1e is adjusted;
The lock nut 1b is in threaded connection with the screw portion of the positioning rod 1a, and after the tightness of the disc spring assembly 1e is adjusted by the adjusting threaded tube 1c, the positioning rod 1a is tensioned, and one end face of the lock nut 1b is tightly attached to the end face of the outer hexagonal end of the adjusting threaded tube 1 c.
As shown in fig. 6, the upper tool holder 4 includes a second positioning plate 4b, an upper tool holder base 4c, a tool holder mounting bracket 4d, and a guide block 4e; in particular, the method comprises the steps of,
The upper tool holder base body 4c is a square plate which is arranged parallel to the lower tool holder base body 1a, and the size of the square plate is matched with that of a first square table of the lower tool holder base body 1 a; the second positioning plate 4b and the guide block 4e are arranged on one side plate surface of the upper cutter holder base body 4c, and the cutter bar mounting frame 4d is arranged on the other side plate surface of the upper cutter holder base body 4 c; wherein,
The second positioning plate 4b is vertically arranged and is centrally fixed at one side edge of the plate surface in a welding mode, a through hole which is matched with the outer diameter of the positioning rod 1a is formed in the second positioning plate 4b, the second positioning plate 4b can be arranged outside the optical axis part of the positioning rod 1a in a penetrating way through the through hole and is positioned between the first positioning plate 1f and the disc spring assembly 1e, and the end side of the disc spring assembly 1e is propped against the plate surface of the second positioning plate 4 b;
The guide block 4e is welded and fixed on the side edge of the plate surface and provided with a through groove with an axial section corresponding to the shape of the adjusting plate 1j, so that when the second positioning plate 4 is arranged on the positioning rod 1a, the guide block 4e is lapped on the adjusting plate 1j and slides along the adjusting plate 1 j;
The cutter bar mounting frame 4d and the profiling wheel 5 are respectively arranged below the second positioning plate 4b and the guide block 4e, the cutter bar mounting frame 4d is welded and fixed on the bottom surface of the upper cutter holder base body 4c, and the profiling wheel 5 is detachably fixed on the bottom surface of the upper cutter holder base body 4 c; in particular, the method comprises the steps of,
The cutter bar mounting frame 4d is a hollow cuboid frame body with an opening towards the profile modeling wheel side; the hollow frame body consists of four mounting plates and three jacking bolts 4 a; the four mounting plates are connected with each other, wherein two plates are welded on the upper cutter holder base body 4c, the left side plate and the lower side plate are connected with the welding plates through screws to form a hollow cuboid frame body with openings on the top and the right side, and the top of the frame body is welded and fixed on the bottom surface of the upper cutter holder base body 4c so that the opening on the right side faces the direction of the profiling wheel 5; the three jacking bolts 4a are respectively assembled in screw holes formed in the centers of the left side mounting plate, the front side mounting plate and the bottom side mounting plate of the frame body from outside to inside, and a cutter bar inserted in the cutter bar mounting frame 4d is fixed in the hollow frame body under the jacking acting force of the three jacking bolts 4a through fine adjustment;
As shown in fig. 8, the linear guide mechanism 6 is composed of a linear guide pair 6b and a slider 6 a; the slide block 6a is mounted on the linear guide rail pair 6b and can axially move along the linear guide rail pair 6 b; the sliding blocks 6a of the two linear guide mechanisms 6 are respectively fixed in two linear guide mechanism mounting grooves 1i formed in the first square table of the lower tool apron 1 through a plurality of fourth screws 9, correspondingly, two linear guide rail pairs 6b are symmetrically fixed on the top surface of the upper tool apron base body 4c through a plurality of fastening screws 8, so that when the upper tool apron 4 moves along the axial direction of the positioning rod 1a relative to the lower tool apron 1, the two linear guide mechanisms 6 serve as guide mechanisms of the two linear guide mechanisms, and the moving direction of the upper tool apron 4 is ensured to be always kept along the axial direction of the positioning rod 1 a.
As a preferred technical scheme of the embodiment, in order to facilitate fastening and disassembling of each fastening screw 8 and fourth screw 9, a plurality of threaded holes are formed on a sliding block 6a of the linear guide mechanism 6, so that the plurality of fastening screws 8 sequentially penetrate and are fixed on the sliding block 6a and the lower tool apron 1 to connect and fix the two together, and nuts of the fastening screws 8 are also positioned in the screws of the sliding block 6 a; the linear guide rail pair 6b of the linear guide mechanism 6 and the upper tool apron 4 are provided with a plurality of threaded holes in a one-to-one correspondence manner, so that a plurality of fourth screws 9 respectively penetrate through the threaded holes of the upper tool apron 4 and the linear guide rail pair 6b in a one-to-one correspondence manner in sequence to connect and fix the two into a whole.
As a preferable technical scheme of the embodiment, two locking plates 7 are further arranged between the upper tool apron 4 and the linear guide rail pair 6 b; as shown in fig. 9, the locking plate 7 is formed by integrally forming a first horizontal plate, a vertical plate and a second horizontal plate which are sequentially connected, so that the axial section of the locking plate is 匚 A ; the two locking plates 7 are symmetrically arranged at two sides of the upper cutter holder 4 and the linear guide rail pair 6b, two ends of the upper cutter holder 4 and the linear guide rail pair 6b are arranged in through grooves of the two locking plates 7, and the locking plates 7 are fixed on the side edges of the upper cutter holder 4 through fastening bolts assembled on the vertical plates respectively; wherein, the riser length of locking plate 7 suits with the thickness of last blade holder 4 and linear guide pair 6b end side, makes the lower terminal surface of locking plate 7 first horizontal plate and the up end of second horizontal plate press fit respectively on the end side top surface of last blade holder 4 and the end side bottom surface of linear guide pair 6 b.
As shown in fig. 5a and 5b, the inner cone hole cutter bar 3 includes a cutter bar 3a, a cutter pressing block 3b, a fifth screw 3c, a blade 3d, and a shim 3e; the cutter bar 3a is an L-shaped rod body formed by integrally forming a cross bar and a vertical bar positioned on the right side of the cross bar; the shape and the size of the cross rod are respectively matched with the shape and the size of the inner side of the cutter bar mounting frame 4d, so that the cutter bar 3a is fixed in position by fixing the cross rod in the cutter bar mounting frame 4 d; the bottom of the vertical rod and the surface of the rod near one side of the profiling wheel are concavely provided with mounting grooves which are matched with the shapes and the sizes of the blades, so that the cutter pad 3e and the blades 3d are arranged in the mounting grooves from bottom to top, the cutter pressing block 3b is pressed on the blades 3d, and the blades 3d are fixed in the mounting grooves through fifth screws 3c which are assembled between the cutter pressing block 3b and the vertical rod; the blade 3d adopts a composite bevel blade, the blade side of the composite bevel blade is opposite to the wheel body of the profiling wheel 5 and protrudes out of the cutter bar 3a, and the inclination angle of the blade side is consistent with the inclination angle of the hole wall of the target inner taper hole; the length of the vertical rod determines the machining length of the inner cone hole; the distance between the profiling wheel 5 and the vertical rod determines the residual wall thickness of the pipe end after the inner taper hole is processed.
When the inner conical hole cutter bar 3 is used for carrying out inner conical hole processing on the inner wall of a steel pipe, the bottom end of a vertical rod of the inner conical hole cutter bar 3 gradually stretches into a port of the steel pipe fixed on a chamfering machine tool, the whole cutter rotates along with a rotary disc chuck, and is axially fed along with the chamfering machine tool at a certain speed along with the working of the chamfering machine tool, so that the blade 3d realizes layer-by-layer cutting and finally realizes the processing of the inner conical hole; wherein, the blade forms a certain angle with the parallel part of the inner wall, thereby avoiding the problem of the knife vibrating caused by the scratch of the blade and the inner wall of the tube during cutting.
As shown in fig. 7, the cam 5 includes a wheel shaft 5a, two bearings 5b, a wheel body 5d, and a gland 5e; wherein,
The wheel body 5d is formed by integrally forming an upper cylinder and a lower cone; wherein the outer diameter of the lower cone gradually decreases from top to bottom, and the horizontal distance of the conical surface part of the lower cone determines the profiling amount, namely the maximum moving distance of the upper tool apron 4 relative to the upper tool apron 1; an axial through hole is formed in the center of the wheel body 5d, the inner diameter of the lower side of the axial through hole is larger than the inner diameter of the upper side of the axial through hole, and an annular step is formed at the reducing position;
The wheel shaft 5a is of a cylindrical structure with a second annular boss on the outer wall, external threads are arranged on the outer wall of the cylinder above the second annular boss, so that the wheel shaft 5a is arranged in a mounting hole axially formed in the bottom surface of the upper tool apron base body 4c in a threaded mode, the second annular boss is processed into an external hexagonal structure, the wheel shaft 5a is convenient to detach by a wrench, the cylinder below the second annular boss is an optical axis, two bearings 5b are sleeved on the outer wall of the optical axis in an interference fit mode, and the optical axis of the wheel shaft 5a can be automatically rotatably arranged in the axial through hole of the sleeve 5 c; specifically, tapered roller bearings are adopted for both bearings 5 b;
as a preferable technical scheme of the embodiment, a sleeve 5c is also sleeved and fixed outside the optical axis and between the two bearings 5 b;
The gland 5e is arranged in the axial through hole of the wheel body 5d, is of a circular disc-shaped structure, has an upper outer diameter smaller than a lower outer diameter and is provided with an annular step at the reducing position; specifically, the upper outer diameter of the gland 5e is slightly smaller than the upper inner diameter of the axial through hole of the wheel body 5d, the lower outer diameter of the gland 5e is the same as the lower outer diameter of the axial through hole of the wheel body 5d, the annular step edge of the gland 5e is abutted against the lower end face of the annular step of the axial through hole of the wheel body 5d, the gland 5e is fixed on the wheel shaft 5a through a third screw 5f assembled along the axial direction, and the two bearings 5b are pressed by the second annular boss of the wheel shaft 5a and the gland 5 e. Wherein the compression amount of the bearing can be optionally adjusted by adding an adjusting gasket before the gland 5e is installed. As a preferable technical scheme of the embodiment, a circular groove corresponding to the outer diameter of the optical axis of the axle 5a is further formed on the top surface of the gland 5e, so that the bottom end of the optical axis is inserted into the circular groove.
The working process and the working principle of the inner taper hole processing cutter for processing the inner taper hole type groove shown in fig. 1 are as follows:
Firstly, adjusting the quantity and the tightness of the disc spring assemblies 1e through adjusting the threaded pipes 1c so as to adjust the sliding force and the floating quantity of the disc spring assemblies 1e and adjust the threaded pipes 3; selecting a proper profiling wheel 5 according to the pipe diameter of the bent pipe to be processed, so that the horizontal distance of the conical surface part of the lower conical body is matched with the size of the set profiling amount; the distance between the cutter bar 3 of the inner cone hole and the profiling wheel 5 is adjusted according to the residual wall thickness of the bent pipe to be processed, so that the adjustment of the cutting thickness is realized; in addition, a gasket is added between the lower tool apron 1 and the flower disc of the chamfering machine, so that the adjustment of the machining length of the inner taper hole can be realized;
Then, fixing the bent pipe to be processed on a clamping device of a chamfering machine tool, and adjusting the position of the steel pipe to align the pipe end at the side of the inner taper hole to be processed with a vertical rod of the inner taper hole cutter bar 3; in the initial state, the outer wall of the pipe end is contacted with the outer wall of the lower conical surface of the lower conical body of the profiling wheel 5; then, under the driving of the chamfering lathe bed, the outer wall of the side conical surface of the lower conical body of the profiling wheel 5 gradually moves to the outer wall of the upper conical surface of the lower conical body, and simultaneously the cutting edge side of the inner conical hole cutter bar 3 continuously extends into the inner side of the pipe body along the axial direction of the pipe body for cutting; in the process, as the whole cutter rotates along with the rotary flower disc, the blade of the inner taper hole cutter bar 3 cuts the inner wall of the pipe end layer by layer, and finally the inner taper hole processing is completed; because the upper tool holder 4 can freely move along the axial direction of the positioning rod 1a relative to the lower tool holder 1, when the cutter bar moves, the upper tool holder 4 is driven by the conical surface of the lower cone of the profile wheel 5 to move relative to the lower tool holder 1; in the process, the profiling wheel 5 is enabled to rotate freely relative to the wheel shaft all the time, so that the wheel body and the outer wall of the pipe are kept pressed all the time, profiling processing is achieved, and meanwhile friction force between the wheel body 5a and the outer wall of the pipe body is reduced.
Claims (6)
1. The inner taper hole machining cutter is characterized by comprising a lower cutter holder (1), an inner taper hole cutter bar (3), an upper cutter holder (4) and a profiling wheel (5); wherein, the lower tool apron (1) is arranged on a rotary flower disc of the chamfering machine; one side of the upper cutter holder (4) is movably connected with the lower cutter holder (1) through a guide mechanism, so that the upper cutter holder can move along a linear direction relative to the lower cutter holder (1); the inner taper hole cutter bar (3) and the profiling wheel (5) are fixed at the other side of the upper cutter holder (4) at intervals along the line; the inner taper hole cutter bar (3) comprises a cutter bar (3 a) and a blade (3 d); the cutter bar (3 a) is an L-shaped rod body and is composed of a cross bar arranged and fixed in a cutter bar mounting frame (4 d) of the upper cutter holder (4) and a vertical bar integrally formed with the cross bar; the length of the vertical rod is matched with the machining length of the taper hole in the pipe body, a mounting groove which is matched with the shape and the size of the blade is formed in the bottom of the vertical rod and is inwards concave near to the rod surface on one side of the profiling wheel, the blade (3 d) is fixed in the mounting groove, the blade side of the vertical rod extends out to the outer side of the cutter rod (3 a) towards the profiling wheel (5), and the inclination angle of the blade side is consistent with the inclination angle of the hole wall of the target taper hole; the profiling wheel (5) comprises a wheel shaft (5 a) and a wheel body (5 d); the wheel shaft (5 a) is vertically arranged, and the top end of the wheel shaft is fixed on the upper tool apron base body (4 c) through threads; the wheel body (5 d) is rotatably fixed at the bottom end of the wheel shaft (5 a) through two bearings (5 b), and is formed by integrally forming an upper cylinder and a lower cone; the outer diameter of the lower cone gradually decreases from top to bottom, and the horizontal distance of the conical surface part of the lower cone is matched with the profiling amount;
The lower tool apron (1) comprises a positioning rod (1 a) arranged on a lower tool apron base body (1 d), a locking nut (1 b) arranged on the positioning rod (1 a), an adjusting threaded pipe (1 c) and a disc spring assembly (1 e); the positioning rod (1 a) is horizontally arranged above the lower cutter holder base body (1 d), the rear end of the positioning rod is connected with a first positioning plate (1 f) fixed on one side of the lower cutter holder base body (1 d), the front end of the positioning rod is arranged in an adjusting screw hole formed in the center of an adjusting plate (1 j) positioned on the other side of the lower cutter holder base body (1 d) in a penetrating mode, and the disc spring assembly (1 e) is sleeved on the outer side of the positioning rod (1 a) and is arranged between the first positioning plate (1 f) and the adjusting plate (1 j); the adjusting threaded pipe (1 c) and the locking nut (1 b) are sleeved on the positioning rod (1 a) from the front end of the positioning rod (1 a) in sequence; the adjusting threaded pipe (1 c) is an external threaded pipe with an external hexagonal end at one end, external threads of the adjusting threaded pipe are matched with internal threads of the adjusting screw hole, and the threaded end of the adjusting threaded pipe is propped against the end face of the disc spring assembly (1 e); one end of the lock nut (1 b) is propped against the end face of the outer hexagonal end of the adjusting threaded pipe (1 c) and is fixedly connected with the positioning rod (1 a) through threads; the upper cutter holder (4) is movably connected with the upper cutter holder (4) through a guide mechanism and can move along the axial direction of the positioning rod, and the upper cutter holder comprises an upper cutter holder base body (4 c) and a cutter bar mounting frame (4 d); the cutter bar mounting frame (4 d) and the profiling wheel (5) are arranged on the central line of one side plate surface of the upper cutter holder base body (4 c) at intervals along the axial direction of the positioning rod; the cutter bar mounting frame (4 d) is a hollow cuboid frame body with an opening towards the profiling wheel (5), and a jacking bolt (4 a) is respectively arranged on one side plate surface in three directions; the positioning rod (1 a) is composed of a screw rod part positioned at the front side and an optical axis part positioned at the rear side; the disc spring assembly (1 e), the first positioning plate (1 f) and the adjusting plate (1 j) are sleeved outside the optical axis part of the disc spring assembly, and the adjusting threaded pipe (1 c) and the locking nut (1 b) are sleeved outside the screw part of the disc spring assembly; a second positioning plate (4 b) and a guide block (4 e) are symmetrically arranged on the other side plate surface of the upper tool apron base body (4 c) along the axial direction of the positioning rod; the second positioning plate (4 b) is sleeved outside the positioning rod (1 a) through a central hole on the second positioning plate and is positioned between the disc spring assembly (1 e) and the first positioning plate (1 f), the guide block (4 e) is matched with the adjusting plate (1 j) through a through groove formed in the guide block, and when the upper tool apron (4) moves relative to the lower tool apron (1), the adjusting plate (1 j) moves along the axial direction in the through groove of the guide block (4 e);
The guide mechanism is two linear guide mechanisms (6) symmetrically arranged between the lower cutter holder (1) and the upper cutter holder (4); each linear guide mechanism (6) is composed of a linear guide rail pair (6 b) and a sliding block (6 a), and the sliding block (6 a) is arranged in a slideway of the linear guide rail pair (6 b) and can move along the axial direction of the linear guide rail pair (6 b); the two linear guide rail pairs (6 b) are fixed on the upper tool apron (4) in a mode that the axes of the two linear guide rail pairs are parallel to the positioning rod, and the two sliding blocks (6 a) are correspondingly fixed on the lower tool apron (1).
2. The inner cone hole machining tool according to claim 1, wherein the disc spring assembly (1 e) is composed of 20-30 pairs of disc springs, each pair of disc springs is composed of two disc springs installed in an opposite mode, and the maximum profiling amount of the disc spring assembly (1 e) is 45mm.
3. The tool according to claim 2, wherein each disc spring has an arcuate configuration with a thickness of 2.5mm.
4. The internal taper hole machining tool according to claim 1, wherein a shim (3 e) and a presser (3 b) are provided below and above the insert (3 d), respectively, such that the insert (3 d) and the shim (3 e) are provided in the mounting groove, the presser (3 b) is press-fitted on the insert (3 d) and the insert (3 d) is fixed in the mounting groove by a fifth screw (3 c) fitted between the presser (3 b) and the vertical rod.
5. The internal taper hole machining tool according to claim 1, characterized in that two locking plates (7) are also symmetrically arranged between the upper tool holder (4) and the linear guide pair (6 b); the locking plate (7) is formed by integrally forming a first horizontal plate, a vertical plate and a second horizontal plate which are sequentially connected, so that the axial section of the locking plate is 匚; the two locking plates (7) are symmetrically arranged at two sides of the upper cutter holder (4) and the linear guide rail pair (6 b), the two ends of the upper cutter holder (4) and the linear guide rail pair (6 b) are arranged in through grooves of the two locking plates (7), and the locking plates (7) are fixed on the side edges of the upper cutter holder (4) through fastening bolts assembled on vertical plates respectively; the length of the vertical plate of the locking plate (7) is matched with the thicknesses of the upper tool apron (4) and the end side of the linear guide rail pair (6 b), so that the lower end face of the first horizontal plate of the locking plate (7) and the upper end face of the second horizontal plate are respectively pressed and matched on the top face of the end side of the upper tool apron (4) and the bottom face of the end side of the linear guide rail pair (6 b).
6. The inner cone hole machining tool according to claim 1, wherein a plurality of mounting holes (1 h) are symmetrically formed at both side edges of the lower tool holder base body (1 d), so that the lower tool holder (1) is mounted on a rotary disc chuck of the chamfering machine through fixing bolts (2) which are arranged in the mounting holes (1 h) in a one-to-one correspondence manner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110805619.XA CN115609029B (en) | 2021-07-16 | 2021-07-16 | Inner taper hole processing cutter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110805619.XA CN115609029B (en) | 2021-07-16 | 2021-07-16 | Inner taper hole processing cutter |
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| CN115609029A CN115609029A (en) | 2023-01-17 |
| CN115609029B true CN115609029B (en) | 2024-04-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704132A (en) * | 2009-10-30 | 2010-05-12 | 中海石油金洲管道有限公司 | Externally profiling steel tube flat head chamfering device |
| CN103386497A (en) * | 2013-07-31 | 2013-11-13 | 辽宁石油化工大学 | Automatic cutter-feeding pipeline profiling groove tool device |
| CN104096914A (en) * | 2013-04-08 | 2014-10-15 | 沈阳透平机械股份有限公司 | Adjustable floating reamer integrating universal adjusting, rough machining and finish machining |
| CN107363294A (en) * | 2017-07-18 | 2017-11-21 | 山东威达重工股份有限公司 | A kind of inner driving system is from boring tapered hole apparatus |
| EP3509781A2 (en) * | 2016-09-09 | 2019-07-17 | Gühring KG | Multi-edged machining tool and method for machining a bearing track |
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2021
- 2021-07-16 CN CN202110805619.XA patent/CN115609029B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704132A (en) * | 2009-10-30 | 2010-05-12 | 中海石油金洲管道有限公司 | Externally profiling steel tube flat head chamfering device |
| CN104096914A (en) * | 2013-04-08 | 2014-10-15 | 沈阳透平机械股份有限公司 | Adjustable floating reamer integrating universal adjusting, rough machining and finish machining |
| CN103386497A (en) * | 2013-07-31 | 2013-11-13 | 辽宁石油化工大学 | Automatic cutter-feeding pipeline profiling groove tool device |
| EP3509781A2 (en) * | 2016-09-09 | 2019-07-17 | Gühring KG | Multi-edged machining tool and method for machining a bearing track |
| CN107363294A (en) * | 2017-07-18 | 2017-11-21 | 山东威达重工股份有限公司 | A kind of inner driving system is from boring tapered hole apparatus |
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| CN115609029A (en) | 2023-01-17 |
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