CN114012826B - PEX pipe fitting processing combination knife rest - Google Patents
PEX pipe fitting processing combination knife rest Download PDFInfo
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- CN114012826B CN114012826B CN202111293564.5A CN202111293564A CN114012826B CN 114012826 B CN114012826 B CN 114012826B CN 202111293564 A CN202111293564 A CN 202111293564A CN 114012826 B CN114012826 B CN 114012826B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2614—Means for mounting the cutting member
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D7/02—Means for holding or positioning work with clamping means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
- F16N7/40—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems in a closed circulation system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D2007/013—Means for holding or positioning work the work being tubes, rods or logs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- General Engineering & Computer Science (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Gripping On Spindles (AREA)
Abstract
The invention discloses a PEX pipe fitting machining combined tool rest, which has the advantages of stable machining and high machining precision, and the technical scheme comprises a fixing frame, a tool bit assembly arranged on the fixing frame and a first driving mechanism for driving the tool bit assembly to rotate, wherein the tool bit assembly comprises: the rotating seat is rotatably arranged in the fixing frame; the tool rest is arranged at the front end of the rotating seat in a radial adjustable manner; the clamping assembly is arranged on the center of the front end of the rotating seat; the tool rest is further provided with a second driving mechanism for driving the tool rest to move radially, and the tool rest is suitable for the technical field of pipe fitting machining.
Description
Technical Field
The invention belongs to the technical field of pipe fitting machining, and particularly relates to a PEX pipe fitting machining combined tool rest.
Background
Workpieces with hollow columnar structures, such as inserts, valves, pipes and the like, are frequently used in the market, and have huge market demands at home and abroad, the quality requirements of the market on the processing of the workpieces are continuously improved, and at present, most of the processing of the parts adopts traditional machine tools, and the processing method also generally adopts a mode that the workpieces rotate and the cutters do not rotate for processing; however, when the workpiece is too large and too long, there are often problems that the working rotation is unstable and the processing precision is low when the workpiece is at the most red, and aiming at the problems, a cutter expanding power head which can realize the processing mode that the workpiece is static and the cutter rotates is developed, as disclosed in application number CN 201010129804.3.
However, it has problems that the pipe wall of a part of the product is thin, the pipe orifice is easily deformed due to radial force generated by a cutter in processing engineering, and processing precision is affected.
Disclosure of Invention
The invention aims to provide a PEX pipe fitting machining combined tool rest which has the advantages of stable machining and high machining precision.
The purpose of the invention is realized in the following way: the utility model provides a PEX pipe fitting processing combination knife rest, includes the mount, installs the tool bit subassembly on the mount and is used for driving the rotatory first actuating mechanism of tool bit subassembly, its characterized in that: the tool bit assembly includes:
the rotating seat is rotatably arranged in the fixing frame;
the tool rest is arranged at the front end of the rotating seat in a radial adjustable manner;
the clamping assembly is arranged on the center of the front end of the rotating seat;
the tool rest is also provided with a second driving mechanism for driving the tool rest to move radially.
The invention is further provided with: the tool bit assembly further comprises:
the movable seat is embedded at the front end of the rotating seat and can radially slide relative to the rotating seat, and the tool rest is arranged on the movable seat;
the fixing seat is fixed at the front end of the rotating seat, and the clamping assembly is arranged on the fixing seat;
the movable seat and the fixed seat are in cross interweaving, the fixed seat is provided with a sliding hole for the movable seat to pass through, and the movable seat is also provided with a wedge block which is arranged at the inner side of the rotating seat and is obliquely arranged;
the second driving mechanism includes:
a pull rod assembly;
a rotary oil hydraulic cylinder;
one end of the pull rod assembly is connected with the wedge block in a matched mode, and the other end of the pull rod assembly is connected to the rotary oil hydraulic cylinder.
The invention is further provided with: the clamping assembly includes:
the clamping head is used for clamping the inner wall of the pipe fitting to be processed;
an adjustment assembly for adjusting radial expansion or retraction of the collet;
a drive system for controlling movement of the adjustment assembly;
the clamping head comprises a clamping seat with an annular structure and a clamping rod with a multi-petal structure, a plurality of sliding grooves are arranged in the clamping seat, one end of the clamping rod is a sliding part positioned in the sliding grooves, a first reset spring which radially abuts against the sliding part is further arranged in the sliding grooves, an annular groove for installing the clamping seat is arranged in the rotating seat, and a ball bearing is further arranged in the annular groove; an adjusting cavity with a conical structure is formed between clamping rods with multiple-petal structures;
the adjusting component comprises an adjusting rod, an adjusting plate and an adjusting column with a conical structure, the adjusting column is rotatably arranged on the adjusting plate, and the adjusting column is positioned in the adjusting cavity;
the driving system comprises a driving cavity arranged at the bottom end of the rotating seat and an oil supply system for supplying oil to the driving cavity, a first piston ring arranged in the driving cavity is arranged at the tail end of the adjusting rod, the driving cavity is divided into a front piston cavity and a rear piston cavity by the first piston ring, and the oil supply system is respectively communicated with the front piston cavity and the rear piston cavity.
The invention is further provided with: the oil supply system includes:
the Y-type three-position four-way valve comprises a first oil inlet P, a first oil return port T, a first working oil port A and a second working oil port B;
the two-position three-way valve comprises a working oil port P, a second working oil port A and a second working oil port B;
the regulating valve comprises a valve body, a valve core and a return spring, wherein the valve core and the return spring are both positioned in the valve body, two ends of the return spring respectively abut against the valve body and the valve core, and a pressure relief channel which axially penetrates through the valve core is further formed in the valve core;
the two ends of the valve body are respectively provided with an oil outlet and a first oil drain port, and the side surface of the valve body is also provided with an oil inlet and a second oil drain port; when the valve core is in a closed state, the top end of the valve core is in abutting sealing with the oil outlet, the peripheral wall of the bottom end of the valve core is in abutting sealing with the second oil drain port, and the oil inlet and the first oil drain port are in an open state; when the valve core is in a half-open state, the top end of the valve core is separated from the oil outlet, the oil inlet is communicated with the oil outlet, and the oil inlet is communicated with the first oil drain port through a pressure relief channel; when the valve core is in a fully-opened state, the oil outlet, the first oil drain port and the second oil drain port are communicated with the oil inlet;
the first working oil port A is communicated with the front piston cavity, the first working oil port B is communicated with the working oil port P, the second working oil port A is directly communicated with the rear piston cavity, the second working oil port B is communicated with the oil inlet, and the oil outlet is also communicated with the rear piston cavity.
The invention is further provided with: the fixing frame further comprises a fixing bracket positioned at the tail end of the rotating seat, the tail end of the rotating seat is rotationally connected with the fixing bracket, and a sealing piece which radially props against the fixing bracket is arranged at the tail end of the rotating seat;
the rotary seat is provided with a front oil passing hole communicated with the front piston cavity and a rear oil passing hole communicated with the rear piston cavity, the fixed support is provided with a first oil groove communicated with the front oil passing hole and a second oil groove communicated with the rear oil passing hole, the oil supply system is communicated with the front oil passing hole through the first oil groove, and the oil supply system is communicated with the rear oil passing hole through the second oil groove.
The invention is further provided with: the fixing frame is internally provided with a mounting cavity for mounting the rotating seat, and the mounting cavity is internally provided with a supporting mechanism which is abutted against the periphery of the rotating seat; the support mechanisms are in a front group and a rear group, each group of support mechanism comprises a plurality of support assemblies which are arranged in a circumferential array, and the fixing frame is provided with a mounting channel for mounting the support assemblies;
the support assembly includes:
the tilting pad is used for abutting against the periphery of the rotating seat;
the support pin is used for radially abutting against the tilting pad;
and the pressurizing assembly is used for performing radial pressurizing compensation on the supporting pin.
The invention is further provided with: the mounting channel comprises an inner reaming section, a shrinkage cavity section and an outer reaming section which are sequentially arranged from inside to outside, and a shrinkage ring is arranged between the shrinkage cavity section and the outer reaming section;
the support pin is arranged in the shrinkage cavity section, the front end of the support pin passes through the inner reaming section and radially abuts against the tilting pad, the rear end of the support pin axially abuts against the shrinkage ring, and the outer peripheral wall of the support pin is provided with a first sealing ring radially abutting against the shrinkage cavity section;
the supporting pin is also sleeved with a pre-tightening spring positioned in the inner reaming section; the pressurizing assembly is arranged on the outer reaming section.
The invention is further provided with: the supercharging assembly includes:
the high-pressure cylinder is positioned at the outer end of the outer reaming section and comprises a cylinder cover;
the balance sliding sleeve can axially slide and pass through the cylinder cover, and two ends of the balance sliding sleeve are respectively provided with a second piston ring;
the balance rod is axially slidably arranged in the center of the balance sliding sleeve, one end of the balance rod is positioned in the high-pressure cylinder, and the other end of the balance rod is axially abutted against the support pin;
the second reset spring is arranged in the outer reaming section and axially abuts against the balance sliding sleeve;
the balance rod is internally provided with a flow guide channel and a flow guide groove which are communicated, the flow guide channel is axially arranged in the balance rod, and the flow guide groove is radially arranged on the abutting end surface of the balance rod and the supporting pin; the guide channel is also internally provided with a one-way valve for high-pressure oil in the high-pressure cylinder to flow to the guide groove.
The invention is further provided with: the fixed support is also provided with an oil filling hole and an oil outlet hole which are communicated with the mounting cavity, the fixed support is also provided with a circulating oil supply device, the circulating oil supply device comprises a circulating pump, a filtering device, a cooling device and a lubricating oil tank, and the oil outlet hole, the filtering device, the cooling device, the lubricating oil tank, the oil supply pump and the oil filling hole are communicated in sequence.
By adopting the technical scheme, the method has the following advantages:
the product can be supported through the arrangement of the central clamping assembly, so that the stability and the precision of the processing process are ensured, and the processing quality is improved;
through the setting of supporting component, can improve the stability of knife rest rotation in-process to improve machining precision.
The machining method of the PEX pipe fitting machining combined tool rest further comprises a translation air cylinder, wherein the translation air cylinder is used for driving the axial movement of the fixing frame, and the machining method comprises the following steps of:
s1, a translation cylinder drives a fixing frame to integrally move forwards to a designated position, when the fixing frame reaches the designated position, an oil supply system supplies oil to a rear piston cavity, and a chuck of a clamping assembly expands and clamps the inner wall of a pipe fitting to be processed;
s2, the second driving mechanism drives the pull rod assembly to axially translate, so that the tool bit on the tool rest can radially translate to a designated position;
s3, the first driving mechanism drives the rotating seat to rotate, and then the second driving mechanism continues to drive the tool rest to gradually approach the outer wall of the pipe fitting, so that machining is achieved.
By adopting the technical scheme, the processing stability and the processing precision can be improved.
Drawings
FIG. 1 is a cross-sectional structural view of the present invention;
FIG. 2 is a schematic left-hand view of the swivel mount of FIG. 1 in accordance with the invention;
FIG. 3 is an enlarged schematic view of the structure of FIG. 1A according to the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 1B according to the present invention;
FIG. 5 is an enlarged schematic view of the structure of FIG. 1 at C in accordance with the present invention;
FIG. 6 is a schematic view of an oil supply system according to the present invention;
FIG. 7 is a schematic illustration of the structure of the regulator valve of FIG. 6 in accordance with the present invention;
the reference numerals in the drawings are: 1. a fixing frame; 2. a rotating seat; 3. a tool holder; 4. a movable seat; 6. a fixing seat; 7. a pull rod assembly; 8. a rotary oil hydraulic cylinder; 9. a chuck; 10. a clamping rod; 11. a clamping seat; 12. a first return spring; 13. a ball bearing; 14. an adjusting rod; 15. an adjusting plate; 16. an adjusting column; 17. a first piston ring; 18. a front piston chamber; 19. a rear piston chamber; 20. y-type three-position four-way valve; 21. a two-position three-way valve; 22. a regulating valve; 23. a valve core; 24. a return spring; 25. a pressure relief channel; 26. an oil outlet; 27. a first oil drain port; 28. an oil inlet; 29. a second oil drain port; 30. a first oil groove; 32. a second oil groove; 33. tilting pad; 34. a support pin; 35. a necking ring; 36. a pre-tightening spring; 37. a high-pressure cylinder; 38. a balance sliding sleeve; 39. a balance bar; 40. a second return spring; 41. an oil guide channel; 42. a diversion trench; 43. a one-way valve.
Detailed Description
The invention is further described in the following embodiments with reference to the figures, see fig. 1-7:
the utility model provides a PEX pipe fitting processing combination knife rest, includes mount 1, installs the tool bit subassembly on mount 1 and is used for driving the rotatory first actuating mechanism of tool bit subassembly, its characterized in that: the tool bit assembly includes:
the rotating seat 2 is rotatably arranged in the fixing frame 1;
the tool rest 3 is arranged at the front end of the rotating seat 2 in a radial adjustable manner;
the clamping assembly is arranged on the center of the front end of the rotating seat 2;
wherein, the tool rest 3 is also provided with a second driving mechanism for driving the tool rest 3 to move radially.
The principle is as follows: the first driving mechanism can be a motor, the motor drives the rotating seat 2 to rotate through a gear or a belt wheel, then the rotating seat 2 drives the tool rest 3 to rotate around the periphery of the pipe fitting, and therefore the tool bit on the tool rest 3 is used for machining the pipe fitting, and the clamping assembly is used for clamping the inner wall of the pipe fitting, so that the stability and the precision of the machining process are guaranteed.
The tool bit assembly further comprises:
the movable seat 4 is embedded at the front end of the rotary seat 2 and can slide radially relative to the rotary seat 2, and the tool rest 3 is arranged on the movable seat 4; i.e. the tool holder 3 can adjust its radial position along with the radial sliding of the movable seat 4;
the fixed seat 6 is fixed at the front end of the rotating seat 2, and the clamping assembly is arranged on the fixed seat 6; the tool rest 3 is positioned at the radial side of the clamping assembly, namely the clamping assembly can be matched with the tool rest 3 for use;
wherein, the movable seat 4 and the fixed seat 6 are arranged in a cross interweaving way, the fixed seat 6 is provided with a sliding hole for the movable seat 4 to pass through, and the movable seat 4 is also provided with a wedge block which is arranged at the inner side of the rotary seat 2 and is obliquely arranged;
the second driving mechanism includes:
a pull rod assembly 7;
a rotary hydraulic cylinder 8;
one end of the pull rod assembly 7 is connected with the wedge block in a matched mode, and the other end of the pull rod assembly 7 is connected to the rotary oil hydraulic cylinder 8.
The connecting block is arranged at one end of the pull rod assembly 7, which is matched with the wedge block, and the connecting block is provided with a chute matched with the wedge block, and the pull rod assembly 7 is pulled to axially move, so that the wedge block can slide relative to the chute, namely, the radial sliding of the movable seat 4 is realized, the pull rod assembly 7 is movably and rotatably connected with the cylinder rod of the rotary oil hydraulic cylinder 8, namely, the cylinder rod of the rotary oil hydraulic cylinder 8 can drive the pull rod assembly 7 to axially move, and the pull rod assembly 7 can freely rotate relative to the cylinder rod.
The clamping assembly includes:
a chuck 9 for clamping the inner wall of the pipe;
an adjustment assembly for adjusting the radial expansion or retraction of the collet 9;
a drive system for controlling movement of the adjustment assembly;
the clamping head 9 comprises a clamping seat 11 with an annular structure and a clamping rod 10 with a multi-petal structure, wherein a plurality of sliding grooves which are radially arranged are formed in the clamping seat 11, one end of the clamping rod 10 is a sliding part positioned in the sliding groove, a first return spring 12 which radially abuts against the sliding part is further arranged in the sliding groove, a ring groove for installing the clamping seat 11 is formed in the rotating seat 2, and a ball bearing 13 is further arranged in the ring groove; an adjusting cavity with a conical structure is formed between clamping rods 10 with multi-petal structures;
the adjusting assembly comprises an adjusting rod 14, an adjusting plate 15 and an adjusting column 16 with a conical structure, the adjusting column 16 is rotatably arranged on the adjusting plate 15, and the adjusting column 16 is positioned in the adjusting cavity;
the driving system comprises a driving cavity arranged at the bottom end of the rotating seat 2 and an oil supply system for supplying oil to the driving cavity, a first piston ring 17 arranged in the driving cavity is arranged at the tail end of the adjusting rod 14, the driving cavity is divided into a front piston cavity 18 and a rear piston cavity 19 by the first piston ring 17, and the oil supply system is respectively communicated with the front piston cavity 18 and the rear piston cavity 19.
When the clamping head 9 needs to expand and clamp the pipe fitting, the oil supply system supplies oil to the rear piston cavity 19, so that the adjusting rod 14 moves forward, the adjusting plate 15 is driven to move forward, and then the conical adjusting cavity is extruded by the adjusting column 16 on the adjusting plate 15, so that the radial expansion of the clamping head 9 is realized;
conversely, the oil supply system supplies oil to the front piston cavity 18, so that the adjusting rod 14 moves backwards, the adjusting plate 15 is driven to move backwards, namely the adjusting column 16 moves backwards, the clamping head 9 radially retracts under the acting force of the first return spring 12, and the clamping movement of the clamping head 9 is realized.
The fixing frame 1 further comprises a fixing bracket positioned at the tail end of the rotating seat 2, the tail end of the rotating seat 2 is rotationally connected with the fixing bracket, and a sealing piece which radially props against the fixing bracket is arranged at the tail end of the rotating seat 2;
the rotary seat 2 is provided with a front oil passing hole communicated with the front piston cavity 18 and a rear oil passing hole communicated with the rear piston cavity 19, the fixed support is provided with a first oil groove 30 communicated with the front oil passing hole and a second oil groove 32 communicated with the rear oil passing hole, the oil supply system is communicated with the front oil passing hole through the first oil groove 30, and the oil supply system is communicated with the rear oil passing hole through the second oil groove 32.
The oil supply system includes:
the Y-shaped three-position four-way valve 20 comprises a first oil inlet 28P, a first oil return port T, a first working oil port A and a second working oil port B;
the two-position three-way valve 21 comprises a working oil port P, a second working oil port A and a second working oil port B;
the regulating valve 22 comprises a valve body, a valve core 23 and a return spring 24, wherein the valve core 23 and the return spring 24 are both positioned in the valve body, two ends of the return spring 24 respectively abut against the valve body and the valve core 23, and a pressure relief channel 25 axially penetrating through the valve core 23 is further arranged on the valve core 23;
wherein, both ends of the valve body are respectively provided with an oil outlet 26 and a first oil drain port 27, and the side surface of the valve body is also provided with an oil inlet 28 and a second oil drain port 29; when the valve core 23 is in a closed state, the top end of the valve core 23 is in abutting closure with the oil outlet 26, the peripheral wall of the bottom end of the valve core 23 is in abutting closure with the second oil drain port 29, and the oil inlet 28 and the first oil drain port 27 are in an open state; when the valve core 23 is in a half-open state, the top end of the valve core 23 is separated from the oil outlet 26, the oil inlet 28 is communicated with the oil outlet 26, and the oil inlet 28 is communicated with the first oil drain port 27 through the pressure relief channel 25; when the valve core 23 is in a fully opened state, the oil outlet 26, the first oil drain port 27 and the second oil drain port 29 are communicated with the oil inlet 28;
the top end of the valve core 23 is in a truncated cone structure, so that an oil cavity is formed between the valve core 23 and the inner peripheral wall of the valve body in a closed state of the valve core 23, oil is conveniently fed into the oil inlet 28, when the pressure of the oil cavity is increased, the return spring 24 is compressed, and accordingly the valve core 23 is gradually opened, the valve core 23 is separated from the oil outlet 26, and hydraulic oil enters the rear piston cavity 19 through the oil outlet 26; through the arrangement of the valve core 23, when oil supply is started, the valve core 23 can play a role in buffering, high-pressure hydraulic oil generated instantaneously is prevented from directly entering the rear piston cavity 19, and when the hydraulic oil pressure is too high, part of the hydraulic oil can be decompressed through the decompression channel 25 by the first oil discharge port 27; when the chuck 9 is clamped, i.e. the first piston ring 17 is moved forward to a proper position, the pressure of hydraulic oil in the oil cavity is gradually increased, and the pressure release amount of the pressure release channel 25 is smaller than the oil inlet amount, so that the return spring 24 is continuously compressed, i.e. the valve core 23 is in a fully opened state, and at the moment, the oil inlet 28 is directly communicated with the second oil outlet 29, so that further pressure release is realized; namely, in the expanded state of the clamping head 9, the pressure maintaining state can be realized through continuous oil feeding of hydraulic oil, so that the clamping head 9 is prevented from loosening;
wherein, first work hydraulic fluid port A communicates with preceding piston chamber 18, and first work hydraulic fluid port B communicates with work hydraulic fluid port P, and second work hydraulic fluid port A communicates with back piston chamber 19 directly, and second work hydraulic fluid port B communicates with oil inlet 28, and oil-out 26 also communicates with back piston chamber 19.
In use, when the chuck 9 needs to be expanded, the Y-shaped three-position four-way valve 20 is switched to the right position, namely the first oil inlet 28P supplies oil to the first working oil port B, and the two-position three-way valve 21 is switched to the left position, namely hydraulic oil flows from the first working oil port B to the working oil port P, flows to the second working oil port B, and then enters the oil inlet 28 of the regulating valve 22;
when the chuck 9 needs to retract, the Y-shaped three-position four-way valve 20 is switched to the left position, and the two-position three-way valve 21 is switched to the right position, so that quick retraction is realized.
A mounting cavity for mounting the rotary seat 2 is arranged in the fixing frame 1, and a supporting mechanism which is in contact with the periphery of the rotary seat 2 is also arranged in the mounting cavity; the support mechanisms are in a front group and a rear group, each group of support mechanism comprises a plurality of support assemblies which are arranged in a circumferential array, and the fixing frame 1 is provided with a mounting channel for mounting the support assemblies;
the support assembly includes:
tilting pads 33 for abutting against the peripheral side of the rotating base 2;
a support pin 34 for radially interfering with the tilting pad 33;
the supercharging assembly is used for performing radial supercharging compensation on the supporting pin 34.
By arranging the tilting pad 33, a bearing oil wedge is easy to form between the tile surface and the outer surface of the main shaft, and the supporting mode of the tilting pad 33 has the advantages of high rotation precision and good stability; the pressurizing assembly is used for avoiding the problem that the rotation precision of the rotating seat 2 is reduced due to the abrasion of the tilting pad 33.
The mounting channel comprises an inner reaming section, a shrinkage cavity section and an outer reaming section which are sequentially arranged from inside to outside, and a shrinkage ring 35 is arranged between the shrinkage cavity section and the outer reaming section;
the supporting pin 34 is installed in the shrinkage cavity section, the front end of the supporting pin 34 passes through the inner reaming section and radially abuts against the tilting pad 33, the rear end of the supporting pin 34 axially abuts against the shrinkage ring 35, and a first sealing ring radially abutting against the shrinkage cavity section is arranged on the peripheral wall of the supporting pin 34; the first sealing ring is used for sealing and isolating the upper part and the lower part of the shrinkage cavity section;
the support pin 34 is also sleeved with a pre-tightening spring 36 positioned in the inner reaming section; the pressurizing assembly is arranged on the outer reaming section.
The pre-tightening spring 36 is mainly used for providing pre-tightening force for the tilting pad 33, so that the tilting pad can be better attached to the rotating seat 2.
The supercharging assembly includes:
the high-pressure cylinder 37, the high-pressure cylinder 37 locates at the outer end of the outer reaming section, the high-pressure cylinder 37 includes the cylinder cover;
the balance sliding sleeve 38 is arranged through the cylinder cover in an axial sliding way, and second piston rings are arranged at two ends of the balance sliding sleeve 38;
the balance rod 39 is axially slidably arranged in the center of the balance sliding sleeve 38, one end of the balance rod 39 is positioned in the high-pressure cylinder 37, and the other end of the balance rod 39 axially abuts against the support pin 34;
the second return spring 40 is arranged in the outer reaming section, and the second return spring 40 axially abuts against the balance sliding sleeve 38;
wherein, the balance bar 39 is internally provided with a flow guide channel and a flow guide groove 42 which are communicated, the flow guide channel is axially arranged in the balance bar 39, and the flow guide groove 42 is radially arranged on the abutting end surface of the balance bar 39 and the supporting pin 34; the diversion channel is also provided with a check valve 43 for high-pressure oil in the high-pressure cylinder 37 to flow to the diversion trench 42.
The principle is as follows: if the tilting pad 33 is worn, that is, if the gap between the tilting pad 33 and the rotating seat 2 increases, the balance rod 39 moves to the side of the support pin 34 under the high pressure action of the high pressure cylinder 37, after the balance rod moves, a gap is generated between the support pin 34 and the axial direction of the necking ring 35, at this time, under the action of pressure difference, the one-way valve 43 is opened, and part of high pressure oil enters the gap between the support pin 34 and the necking ring 35; because the check valve 43 is present, the high-pressure oil cannot flow back, so the high-pressure oil can play a role in compensating the clearance between the supporting pin 34 and the necking ring 35, that is, the tilting pad 33 can be always abutted against the rotating seat 2, and the stability of the rotating seat 2 during rotation is ensured.
The fixed support is also provided with an oil filling hole and an oil outlet hole which are communicated with the mounting cavity, the fixed support is also provided with a circulating oil supply device, the circulating oil supply device comprises a circulating pump, a filtering device, a cooling device and a lubricating oil tank, and the oil outlet hole, the filtering device, the cooling device, the lubricating oil tank, the oil supply pump and the oil filling hole are communicated in sequence.
Wherein, the circulating pump, the filtering device, the cooling device and the lubricating oil tank can be obtained by outsourcing the existing equipment; through the arrangement of the equipment, the rotating seat 2 pumps lubricating oil into the installation cavity at regular time by the circulating oil supply device in the long-time operation process, and is used for updating the lubricating oil in the installation cavity, so that the lubricating oil can be ensured to be in an optimal state.
The machining method of the PEX pipe fitting machining combined tool rest, wherein the PEX pipe fitting machining combined tool rest 3 further comprises a translation air cylinder, the translation air cylinder is used for driving the axial movement of the fixing frame 1, and the machining method comprises the following steps of:
s1, a translation cylinder drives a fixing frame 1 to integrally move forwards to a designated position, when the fixed frame reaches the designated position, an oil supply system supplies oil into a rear piston cavity 19, and a chuck 9 of a clamping assembly expands and clamps the inner wall of a pipe fitting to be processed;
s2, the second driving mechanism drives the pull rod assembly 7 to axially translate, so that the tool bit on the tool rest 3 can radially translate to a designated position;
s3, the first driving mechanism drives the rotating seat 2 to rotate, and then the second driving mechanism continues to drive the tool rest 3 to gradually approach the outer wall of the pipe fitting, so that machining is achieved.
By the method, the pipe fitting to be machined is stationary, and the machining mode of rotary cutting by the machining tool rest 3 is realized, so that the machining stability is better.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (8)
1. The utility model provides a PEX pipe fitting processing combination knife rest, includes mount (1), installs the tool bit subassembly on mount (1) and is used for driving the rotatory first actuating mechanism of tool bit subassembly, its characterized in that: the tool bit assembly includes:
the rotating seat (2) is rotatably arranged in the fixing frame (1);
the tool rest (3), the tool rest (3) can be radially adjustable and arranged at the front end of the rotating seat (2);
the clamping assembly is arranged on the center of the front end of the rotating seat (2);
wherein, the tool rest (3) is also provided with a second driving mechanism for driving the tool rest (3) to move radially;
the clamping assembly includes:
a chuck (9) for clamping the inner wall of the pipe to be processed;
an adjustment assembly for adjusting the radial expansion or retraction of the collet (9);
a drive system for controlling movement of the adjustment assembly;
the clamping head (9) comprises a clamping seat (11) with an annular structure and a clamping rod (10) with a multi-petal structure, a plurality of sliding grooves which are radially arranged are formed in the clamping seat (11), one end of the clamping rod (10) is a sliding part positioned in the sliding groove, a first reset spring (12) which radially abuts against the sliding part is further arranged in the sliding groove, a ring groove for installing the clamping seat (11) is formed in the rotating seat (2), and a ball bearing (13) is further arranged in the ring groove; an adjusting cavity with a conical structure is formed between clamping rods (10) with multi-petal structures;
the adjusting assembly comprises an adjusting rod (14), an adjusting plate (15) and an adjusting column (16) with a conical structure, the adjusting column (16) is rotatably arranged on the adjusting plate (15), and the adjusting column (16) is positioned in the adjusting cavity;
the driving system comprises a driving cavity arranged at the bottom end of the rotating seat (2) and an oil supply system for supplying oil to the driving cavity, a first piston ring (17) arranged in the driving cavity is arranged at the tail end of the adjusting rod (14), the driving cavity is divided into a front piston cavity (18) and a rear piston cavity (19) by the first piston ring (17), and the oil supply system is respectively communicated with the front piston cavity (18) and the rear piston cavity (19);
the oil supply system includes:
the Y-shaped three-position four-way valve (20) comprises a first oil inlet P, a first oil return port T, a first working oil port A and a second working oil port B;
the two-position three-way valve (21), the two-position three-way valve (21) comprises a working oil port P, a second working oil port A and a second working oil port B;
the regulating valve (22), the regulating valve (22) comprises a valve body, a valve core (23) and a return spring (24), the valve core (23) and the return spring (24) are both positioned in the valve body, two ends of the return spring (24) are respectively abutted against the valve body and the valve core (23), and a pressure relief channel (25) axially penetrating through the valve core (23) is further formed in the valve core (23);
the two ends of the valve body are respectively provided with an oil outlet (26) and a first oil drain port (27), and the side surface of the valve body is also provided with an oil inlet (28) and a second oil drain port (29); when the valve core (23) is in a closed state, the top end of the valve core (23) is in abutting sealing with the oil outlet (26), the peripheral wall of the bottom end of the valve core (23) is in abutting sealing with the second oil drain port (29), and the oil inlet (28) and the first oil drain port (27) are in an open state; when the valve core (23) is in a half-open state, the top end of the valve core (23) is separated from the oil outlet (26), the oil inlet (28) is communicated with the oil outlet (26), and the oil inlet (28) is communicated with the first oil drain port (27) through the pressure relief channel (25); when the valve core (23) is in a fully-opened state, the oil outlet (26), the first oil drain port (27) and the second oil drain port (29) are communicated with the oil inlet (28);
the first working oil port A is communicated with the front piston cavity (18), the first working oil port B is communicated with the working oil port P, the second working oil port A is directly communicated with the rear piston cavity (19), the second working oil port B is communicated with the oil inlet (28), and the oil outlet (26) is also communicated with the rear piston cavity (19).
2. The PEX pipe machining composite tool rest of claim 1, wherein: the tool bit assembly further comprises:
the movable seat (4) is embedded at the front end of the rotary seat (2) and can slide radially relative to the rotary seat (2), and the tool rest (3) is arranged on the movable seat (4);
the fixing seat (6), the fixing seat (6) is fixed at the front end of the rotating seat (2), and the clamping assembly is arranged on the fixing seat (6);
the movable seat (4) and the fixed seat (6) are arranged in a cross interweaving way, a sliding hole for the movable seat (4) to pass through is formed in the fixed seat (6), and a wedge block which is arranged at the inner side of the rotary seat (2) and is obliquely arranged is also arranged on the movable seat (4);
the second driving mechanism includes:
a pull rod assembly (7);
a rotary hydraulic cylinder (8);
one end of the pull rod assembly (7) is connected with the wedge block in a matched mode, and the other end of the pull rod assembly (7) is connected to the rotary oil hydraulic cylinder (8).
3. The PEX pipe machining composite tool rest of claim 1, wherein: the fixing frame (1) further comprises a fixing bracket positioned at the tail end of the rotating seat (2), the tail end of the rotating seat (2) is rotationally connected with the fixing bracket, and a sealing piece which radially props against the fixing bracket is arranged at the tail end of the rotating seat (2);
the rotary seat (2) is provided with a front oil passing hole communicated with the front piston cavity (18) and a rear oil passing hole communicated with the rear piston cavity (19), the fixed support is provided with a first oil groove (30) communicated with the front oil passing hole and a second oil groove (32) communicated with the rear oil passing hole, the oil supply system is communicated with the front oil passing hole through the first oil groove (30), and the oil supply system is communicated with the rear oil passing hole through the second oil groove (32).
4. The PEX pipe machining composite tool rest of claim 1, wherein: a mounting cavity for mounting the rotating seat (2) is arranged in the fixing frame (1), and a supporting mechanism which is in contact with the periphery of the rotating seat (2) is also arranged in the mounting cavity; the support mechanisms are in a front group and a rear group, each group of support mechanism comprises a plurality of support assemblies which are arranged in a circumferential array, and the fixing frame (1) is provided with a mounting channel for mounting the support assemblies;
the support assembly includes:
tilting pad (33) for abutting against the peripheral side of the rotating base (2);
a support pin (34) for radially interfering with the tilting pad (33);
and the pressurizing assembly is used for performing radial pressurizing compensation on the supporting pin (34).
5. The PEX pipe machining composite tool rest of claim 4, wherein: the mounting channel comprises an inner reaming section, a shrinkage cavity section and an outer reaming section which are sequentially arranged from inside to outside, and a shrinkage ring (35) is arranged between the shrinkage cavity section and the outer reaming section;
the supporting pin (34) is arranged in the shrinkage cavity section, the front end of the supporting pin (34) penetrates through the inner reaming section and radially abuts against the tilting pad (33), the rear end of the supporting pin (34) axially abuts against the shrinkage ring (35), and a first sealing ring radially abutting against the shrinkage cavity section is arranged on the peripheral wall of the supporting pin (34);
the support pin (34) is also sleeved with a pre-tightening spring (36) positioned in the inner reaming section; the pressurizing assembly is arranged on the outer reaming section.
6. The PEX pipe machining composite tool rest of claim 4, wherein: the supercharging assembly includes:
the high-pressure cylinder (37), the high-pressure cylinder (37) is located at the outer end of the outer reaming section, and the high-pressure cylinder (37) comprises a cylinder cover;
the balance sliding sleeve (38) can axially slide through the cylinder cover, and second piston rings are arranged at two ends of the balance sliding sleeve (38);
the balance rod (39) is axially slidably arranged in the center of the balance sliding sleeve (38), one end of the balance rod (39) is positioned in the high-pressure cylinder (37), and the other end of the balance rod (39) axially abuts against the support pin (34);
the second reset spring (40) is arranged in the outer reaming section, and the second reset spring (40) axially abuts against the balance sliding sleeve (38);
wherein, a flow guide channel and a flow guide groove (42) which are communicated are arranged in the balance rod (39), the flow guide channel is axially arranged in the balance rod (39), and the flow guide groove (42) is radially arranged on the abutting end surface of the balance rod (39) and the supporting pin (34); the diversion channel is also internally provided with a one-way valve (43) for high-pressure oil in the high-pressure cylinder (37) to flow to the diversion trench (42).
7. The PEX pipe machining composite tool rest of claim 1, wherein: the fixed support is also provided with an oil filling hole and an oil outlet hole which are communicated with the mounting cavity, the fixed support is also provided with a circulating oil supply device, the circulating oil supply device comprises a circulating pump, a filtering device, a cooling device and a lubricating oil tank, and the oil outlet hole, the filtering device, the cooling device, the lubricating oil tank, the oil supply pump and the oil filling hole are communicated in sequence.
8. A machining method for a PEX pipe machining composite tool rest according to any one of claims 1 to 7, characterized in that: the PEX pipe fitting machining combined tool rest (3) further comprises a translation air cylinder, wherein the translation air cylinder is used for driving the axial movement of the fixing frame (1), and the machining method comprises the following steps of:
s1, a translation cylinder drives a fixing frame (1) to integrally move forwards to a designated position, when the designated position is reached, an oil supply system supplies oil into a rear piston cavity (19), and a chuck (9) of a clamping assembly expands and clamps the inner wall of a pipe fitting to be processed;
s2, the second driving mechanism drives the pull rod assembly (7) to axially translate, so that the tool bit on the tool rest (3) can radially translate to a designated position;
s3, the first driving mechanism drives the rotating seat (2) to rotate, and then the second driving mechanism continues to drive the tool rest (3) to gradually approach the outer wall of the pipe fitting, so that machining is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111293564.5A CN114012826B (en) | 2021-11-03 | 2021-11-03 | PEX pipe fitting processing combination knife rest |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111293564.5A CN114012826B (en) | 2021-11-03 | 2021-11-03 | PEX pipe fitting processing combination knife rest |
Publications (2)
| Publication Number | Publication Date |
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| CN114012826A CN114012826A (en) | 2022-02-08 |
| CN114012826B true CN114012826B (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111293564.5A Active CN114012826B (en) | 2021-11-03 | 2021-11-03 | PEX pipe fitting processing combination knife rest |
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| CN (1) | CN114012826B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1038111A1 (en) * | 1981-12-21 | 1983-08-30 | Предприятие П/Я А-3633 | Apparatus for dismounting expanded tubes |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4235525A1 (en) * | 1992-10-21 | 1994-05-05 | Eichener Maschinenfabrik Gmbh | Cutting device esp. for thin walled pipes - has circular blades mounted on free ends of blade arms which are forced against tube wall by drive on adjusting bush through rotor base |
| CN201543735U (en) * | 2009-10-12 | 2010-08-11 | 东莞永大制冷配件有限公司 | Portable tube expander |
| CN105127501B (en) * | 2015-09-18 | 2017-07-18 | 合肥工业大学 | The method that rotary-cut is carried out for the automatic rotary cutting device of thin-wall pipe and using it |
| CN107283814B (en) * | 2017-07-12 | 2018-08-03 | 台州半城暖通科技有限公司 | A kind of effective tube expansion head of flexibility |
| CN108188467B (en) * | 2018-03-19 | 2024-04-09 | 江苏科技大学 | Self-propelled device for cutting corrugated pipe |
| CN108673577A (en) * | 2018-05-21 | 2018-10-19 | 宁波恒元精工管阀科技有限公司 | A kind of pipe fitting cutter device |
| CN109692997A (en) * | 2018-12-27 | 2019-04-30 | 苏州华尔普机械有限公司 | A kind of interior clamping pipe fitting rotary cutting mechanism |
-
2021
- 2021-11-03 CN CN202111293564.5A patent/CN114012826B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1038111A1 (en) * | 1981-12-21 | 1983-08-30 | Предприятие П/Я А-3633 | Apparatus for dismounting expanded tubes |
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