CN111774585B - Manufacturing method and cutter for tubular hemming part - Google Patents
Manufacturing method and cutter for tubular hemming part Download PDFInfo
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- CN111774585B CN111774585B CN202010743860.XA CN202010743860A CN111774585B CN 111774585 B CN111774585 B CN 111774585B CN 202010743860 A CN202010743860 A CN 202010743860A CN 111774585 B CN111774585 B CN 111774585B
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- cutter
- arc surface
- flanging
- cutter body
- tubular
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
Abstract
The invention discloses a manufacturing method of a tubular hemming part and a cutter, wherein a machine tool chuck drives a rotating part to rotate, a cutter body is fed towards the direction of the part, the right front end of the part is contacted with a cutter guide end and then guided into a cutter forming arc surface, the arc end surface of the rotating part is extruded at an edge type round corner at the front side of the cutter and then enters the rear corner of the cutter to be hemmed and formed, so that the forming flanging end surface, the flanging arc surface, the arc end surface and the flanging inner arc surface of the rotating part are formed, the flanging arc surface formed by extruding and hemming enters the cutter forming arc surface, and the extruded heat flanging arc surface and the flanging inner arc surface are contacted with air to carry out normal heat exchange when the part rotates to be not contacted with the cutter forming arc surface due to the fact that the flanging arc surface is always contacted with the inner surface of a hemming cutter groove, and the problem that the heat cannot be dissipated to change the organizational performance is solved.
Description
Technical Field
The invention relates to a manufacturing method and a cutter of a tubular hemming part, and belongs to the technical field of pipe fitting production.
Background
In modern part design, the head of the cylindrical pipe is provided with more and more parts with R-shaped flanges, the structural form is single, but the applied materials are various in types and different in size specification, and the traditional manufacturing method comprises the following steps: turning, drilling and material breaking, stamping, mouth expanding, stamping, bending forming, turning and flat end face turning, the production efficiency is low due to the complex manufacturing process, and meanwhile, two auxiliary forming dies are needed only by stamping, so that the production cost is increased;
although the prior art adopted by the present company (chinese patent publication No. CN102825123B discloses a hemming method and apparatus for tubular rivets), has solved the above problems, the problem that the heat cannot be dissipated to change the texture performance because the circular arc surface of the flange is always in contact with the inner surface of the hemming knife slot when the hemming knife is in an integral type and the tubular part is hemmed.
Disclosure of Invention
In order to solve the technical problem, the invention provides a manufacturing method and a cutter for a tubular hemming part.
The invention is realized by the following technical scheme.
The invention provides a manufacturing method of a tubular hemming part, which comprises the following steps:
step one, clamping: clamping a tubular part on a chuck rotating by a machine tool, clamping and fixing the trapezoidal rear end of a cutter body on a tailstock, and superposing the central line axes of the part and the cutter body in a collinear manner;
step two, manufacturing: the machine tool chuck drives a rotating part to rotate, the cutter body is fed towards the direction of the part in a close manner, the right front end of the part is guided into a cutter forming arc surface after contacting with a cutter guide end, the arc end surface of the rotating part enters a cutter rear angle for edge curling forming after being extruded at an edge type fillet on the front surface of the cutter, so that the forming flanging end surface, the flanging arc surface, the arc end surface and the inner arc surface of the flanging of the rotating part enter the cutter forming arc surface;
step three, retracting the cutter: when the feeding amount of the cutter body to the direction of the part reaches the length of the part to be curled, the cutter body retreats away from the direction of the part, and then the machine is stopped to take out the curled part.
The machine tool chuck drives a rotating part to rotate at a rotating speed of 600-800 r/min, the feeding speed of the cutter body close to the direction of the part is 0.16-0.08 r/mm, the rotating speed and the feeding speed are too slow to match, so that the heat generated by extrusion of the arc end surface of the part and the edge-shaped fillet is smaller than the heat dissipated by contact of the arc surface of the flanging and the inner arc surface of the flanging with air during edge curling, the inner arc surface of the flanging and the arc end surface form ripples, the surface quality is influenced, and the production efficiency is low; rotatory rotational speed, feed rate cooperation are too fast, lead to when the turn-up, lead to the arc end face of part and the heat that sword type fillet extrusion produced to be greater than the heat that turn-ups arc surface, turn-ups inner arc surface and air contact gived off, lead to the heat can't give off and change the organizational performance.
A cutter comprises a cutter body of the manufacturing method of the tubular hemming part, the cutter body is a trapezoid block, the front face of a trapezoidal front end cutter of the cutter body is provided with an edge type fillet, the front face of the cutter is provided with a cutter front angle, a cutter back angle and a cutter wedge angle, the front end of the trapezoid cutter body is vertically trapezoidal from top to bottom, the upper section symmetrical end and the lower section symmetrical end of the front end of the trapezoid cutter body in the longitudinal direction are provided with cutter forming arc surfaces, the radian radius of the cutter forming arc surfaces is the same as that of the hemming radian of the part, so that a cutter guide end is formed in the longitudinal direction of the cutter body, and the cutter back angle existing on the cutter guide end enables the cutter guide end to form a cutter front end face.
The back angle of the cutter is 5-8 degrees, the too small radial force of the back angle of the cutter is increased, so that the part is easy to bend and the curled edge R is not full in the machining process, the too large back angle cannot play a role in smoothing, and the vibration of a process system is easy to cause to influence the surface machining quality of the part in the machining process.
The radius value of the edge type fillet is 0.3.mm, cutting of parts is avoided, and extrusion deformation and polishing of the parts by the cutter body are achieved, so that the surface quality of the parts is improved.
The invention has the beneficial effects that: because the cutter shaping arc surface is in the open type on the cutter body, when the part rotates to be not contacted with the cutter shaping arc surface, the extruded heat flanging arc surface and the inner arc surface of the flanging are contacted with air to carry out normal heat exchange, thereby solving the problem that the flanging arc surface is contacted with the inner surface of the flanging cutter groove all the time to cause that the heat can not be emitted to change the tissue performance.
Drawings
FIG. 1 is a front view of the tool body of the present invention;
FIG. 2 is a top plan view of the tool body of the present invention based on FIG. 1;
FIG. 3 is a state diagram of the present invention in a separated position of the machined part from the tool body;
in the figure: 1-parts; 2-a tool body; 3-flanging end faces; 4-flanging circular arc surface; 5-arc end surface; 6-flanging the inner arc surface; 10-front end surface of the cutter; 13-tool rake angle; 14-tool relief angle; 15-tool wedge angle; 18-blade type round angle; 19-cutter leading end.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
See fig. 1-3.
The invention relates to a manufacturing method of a tubular hemming part, which comprises the following steps:
step one, clamping: clamping a tubular part 1 on a chuck rotating on a machine tool, clamping and fixing the trapezoidal rear end of a cutter body 2 on a tailstock, and enabling central line axes of the part 1 and the cutter body 2 to be coincided in a collinear mode;
step two, manufacturing: the lathe chuck drives the rotatory part 1 rotation, cutter body 2 is close to and feeds to 1 direction of part, guide to cutter shaping arc surface 9 after the right front end of part 1 contacts with cutter leading end 19, the circular arc terminal surface 5 of rotatory part 1 enters cutter relief angle 14 after the extrusion of the sword type fillet 18 department of cutter front 17 and rolls up the shaping, make 1 shaping turn-ups terminal surface 3 of rotatory part, turn-ups arc surface 4, circular arc terminal surface 5, arc surface 6 in the turn-ups, turn-ups arc surface 4 after the extrusion turn-ups shaping enters into cutter shaping arc surface 9, because cutter shaping arc surface 9 is in open on cutter body 2, when part 1 rotates to not contacting with cutter shaping arc surface 9, extruded heat turn-ups arc surface 4, turn-ups arc surface 6 carries out normal heat exchange with the air contact, the problem that the turn-ups arc surface contacts with the turn-ups inner face all the time and leads to the unable heat of giving off and changes organizational performance is solved.
Step three, retracting the cutter: when the feeding amount of the cutter body 2 to the direction of the part 1 reaches the length of the part 1 to be curled, the cutter body 2 is far away from the direction of the part 1 to withdraw the cutter, and then the machine is stopped to take out the curled part 1.
The difference between the HRC of the material of the cutter body 2 and the HRC of the material of the part 1 is at least 6, for example, when the cutter body 2 is made of HRC58 alloy steel, the part 1 is made of H62 brass, and the situation that the cutter body 2 collapses when the part 1 is subjected to edge curling is avoided.
The machine tool chuck drives the rotating part 1 to rotate at a rotating speed of 600-800 r/min, the feeding speed of the cutter body 2 close to the direction of the part 1 is 0.16-0.08 r/mm, the rotating speed and the feeding speed are too slow to match, so that the heat generated by extruding the arc end face 5 of the part 1 and the edge-shaped fillet 18 is less than the heat dissipated by the contact of the flanging arc face 4 and the flanging inner arc face 6 with air during edge curling, the flanging inner arc face 6 and the arc end face 5 form ripples, the surface quality is influenced, and the production efficiency is low; the cooperation of rotational speed, feed rate is too fast, leads to when the turn-up, leads to the heat that the extrusion of the circular arc terminal surface 5 of part 1 and sword type fillet 18 produced to be greater than the heat that turn-ups arc surface 4, turn-ups inner arc surface 6 and air contact gived off, leads to the heat can't give off and change the organizational performance.
A cutter comprises a cutter body 2 used in the manufacturing method of the tubular hemming part, the cutter body 2 is a trapezoid block, the front 17 of the front trapezoidal end of the cutter body 2 is provided with a blade-shaped fillet 18, the front 17 of the cutter is provided with a cutter front angle 13, a cutter back angle 14 and a cutter wedge angle 15, the front vertical end of the front trapezoidal end of the cutter body 2 is trapezoid from top to bottom, the symmetrical ends of the upper and lower longitudinal sections of the front trapezoidal end of the cutter body 2 are provided with cutter forming arc surfaces 9, the radian radius of the cutter forming arc surfaces 9 is the same as the radian radius of the hemming required by the part 1, so that the cutter guide end 19 is formed in the longitudinal direction of the cutter body 2, and the cutter back angle 14 arranged on the cutter guide end 19 enables the cutter guide end 19 to form a cutter front end face 10.
The vertical width L of the tool leading end 19 is smaller than the inner diameter of the tubular part 1, so that the tool leading end 19 provides guidance when the part 1 is axially fed.
The cutter back angle 14 is 5 degrees to 8 degrees, the part is bent and the curled edge R is not full easily due to too small radial force increase of the cutter back angle 14, the back angle is too large, the polishing effect cannot be achieved, and the surface processing quality of the part is affected easily due to the vibration of a process system in the processing process.
The radius value of the edge type fillet 18 is 0.3mm, cutting of the part 1 is avoided, and the cutter body 2 is enabled to extrude and deform the part 1 and smooth the surface of the part, so that the surface quality of the part is improved.
The wedge angle 15 of the cutter is 55-60 degrees, the rigidity of the cutter is guaranteed, and the influence of vibration on the processing quality is avoided.
The front angle 13 of the cutter is-3 degrees to-5 degrees, so that the phenomenon that the wall thickness of a product is uneven after the product is processed due to cutting caused by the Taize Li of the cutter is avoided, and the extrusion polishing effect is realized by adopting a negative front angle, so that the surface quality of the product is facilitated.
Claims (10)
1. A method of manufacturing a tubular beaded part, the steps comprising:
step one, clamping: clamping a tubular part (1) on a chuck rotating on a machine tool, clamping and fixing the trapezoidal rear end of a cutter body (2) on a tailstock, and enabling central line axes of the part (1) and the cutter body (2) to be coincided in a collinear mode;
step two, manufacturing: the machine tool chuck drives a rotating part (1) to rotate, a cutter body (2) is close to and feeds the part (1) in the direction, the right front end of the part (1) is in contact with a cutter guide end (19) and then is guided into a cutter forming arc surface (9), an arc end surface (5) of the rotating part (1) is extruded at a blade type fillet (18) of a cutter front surface (17) and then enters a cutter rear angle (14) for edge curling forming, so that the rotating part (1) is formed into a flanging end surface (3), a flanging arc surface (4), an arc end surface (5) and a flanging inner arc surface (6), the flanging arc surface (4) after edge curling is extruded enters the cutter forming arc surface (9), and the flanging arc surface (9) is in an open type on the cutter body (2), when the part (1) rotates to be not in contact with the cutter forming arc surface (9), the extruded heat flanging arc surface (4) and the inner arc surface (6) are in contact with air to carry out normal heat exchange;
step three, retracting the cutter: when the feeding amount of the cutter body (2) to the direction of the part (1) reaches the length of the part (1) to be curled, the cutter body (2) is far away from the direction of the part (1) to withdraw the cutter, and then the machine is stopped to take out the curled part (1).
2. A method of manufacturing a tubular hemming part of claim 1 wherein: the difference between the HRC of the material of the cutter body (2) and the HRC of the material of the part (1) is at least 6.
3. A method of manufacturing a tubular hemming part of claim 1 wherein: the cutter body 2 is made of HRC58 alloy steel with material hardness.
4. A method of manufacturing a tubular crimping part according to claim 1, characterized in that: the machine tool chuck drives the rotating part (1) to rotate at the rotating speed of 600-800 r/min; the feeding speed of the cutter body (2) close to the direction of the part (1) is 0.16-0.08 r/mm.
5. A cutter comprises a cutter body (2) used for the manufacturing method of the tubular hemming part as claimed in any one of claims 1 to 4, the cutter body (2) is a trapezoid block, a front cutter face (17) at the trapezoid front end of the cutter body (2) is provided with a blade-shaped fillet (18), a front cutter face (17) is provided with a front cutter corner (13), a rear cutter corner (14) and a wedge cutter corner (15), the front trapezoid front end of the cutter body (2) is vertically trapezoid from top to bottom, the symmetrical ends of the upper and lower sections in the longitudinal direction of the front trapezoid front end of the cutter body (2) are provided with a cutter forming arc surface (9), the radian radius of the cutter forming arc surface (9) is the same as the needed hemming radian radius of the part (1), so that a cutter guide end (19) is formed in the longitudinal direction of the cutter body (2), and the cutter rear cutter corner (14) existing on the cutter guide end (19) enables the cutter guide end (19) to form a cutter front end surface (10).
6. The tool according to claim 5, wherein: the vertical width L of the cutter guide end (19) is smaller than the inner diameter of the tubular part (1).
7. The tool according to claim 5, wherein: the radius value of the blade-shaped round angle (18) is 0.3mm.
8. The tool according to claim 5, wherein: the cutter back angle (14) is 5-8 degrees.
9. The tool according to claim 5, wherein: the wedge angle (15) of the cutter is 55-60 degrees.
10. The tool according to claim 5, wherein: the front angle (13) of the cutter is-3 degrees to-5 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010743860.XA CN111774585B (en) | 2020-07-29 | 2020-07-29 | Manufacturing method and cutter for tubular hemming part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010743860.XA CN111774585B (en) | 2020-07-29 | 2020-07-29 | Manufacturing method and cutter for tubular hemming part |
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| Publication Number | Publication Date |
|---|---|
| CN111774585A CN111774585A (en) | 2020-10-16 |
| CN111774585B true CN111774585B (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010743860.XA Active CN111774585B (en) | 2020-07-29 | 2020-07-29 | Manufacturing method and cutter for tubular hemming part |
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| CN (1) | CN111774585B (en) |
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| SU1400718A1 (en) * | 1986-12-24 | 1988-06-07 | Центральное Технико-Конструкторское Бюро Министерства Речного Флота | Arrangement for flanging tube edges |
| CN2264627Y (en) * | 1996-02-29 | 1997-10-15 | 南京化学工业(集团)公司化工机械厂 | Pipe orifice turn-up edge rotary pressing forming device on general lathe |
| CN101214558A (en) * | 2008-01-18 | 2008-07-09 | 丁阳明 | Cutting tool special for processing covers or tubes parts |
| CN201760617U (en) * | 2010-08-06 | 2011-03-16 | 威士精密工具(上海)有限公司 | CBN pore boring and milling cutter |
| CN102825123B (en) * | 2011-06-13 | 2015-07-08 | 贵州航天精工制造有限公司 | Hemming method and device for tubular rivet |
| CN102489617A (en) * | 2011-12-02 | 2012-06-13 | 王平安 | Metal tube seal process |
| CN102975085B (en) * | 2012-11-22 | 2015-04-01 | 珠海格力电器股份有限公司 | Pipe flanging equipment |
| CN203330245U (en) * | 2013-06-16 | 2013-12-11 | 刘文全 | Novel pipe fitting pipe opening inside flanging tool |
| CN203936199U (en) * | 2014-06-13 | 2014-11-12 | 永康市鸿基工贸有限公司 | Bowl crimping process tool frock |
| CN203900199U (en) * | 2014-06-17 | 2014-10-29 | 山西利民工业有限责任公司 | Edge curling forming device for pipe ends of thin-wall pipe fittings |
| CN104607673A (en) * | 2014-12-09 | 2015-05-13 | 上海航天精密机械研究所 | Turning tool for improving quality of surface of flange end face sealing groove |
| KR101714256B1 (en) * | 2015-11-04 | 2017-03-08 | 현대자동차주식회사 | Swivel jig cam for machining burring hole of door inner panel and operation method thereof |
| CN205147330U (en) * | 2015-12-02 | 2016-04-13 | 九江财兴卫浴实业有限公司 | Metal straight tube expands flanger soon |
| CN107598199A (en) * | 2017-11-06 | 2018-01-19 | 启东锦桥轴承有限公司 | Convex spheroid machining combination forming cutter |
| CN207873157U (en) * | 2017-12-29 | 2018-09-18 | 浙江长兴和良智能装备有限公司 | A kind of cut-out chamfering tool and numerical control cutting edge turning chamfering machine |
| CN210132103U (en) * | 2019-05-30 | 2020-03-10 | 厦门金鹭特种合金有限公司 | Indexable profiling milling blade and profiling cutter thereof |
| CN110935805B (en) * | 2019-11-21 | 2021-05-18 | 贵州华烽电器有限公司 | Riveting method for duplicate gear |
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2020
- 2020-07-29 CN CN202010743860.XA patent/CN111774585B/en active Active
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