CN102950522B - A kind of cold drawing die arrangement for grinding and method - Google Patents
A kind of cold drawing die arrangement for grinding and method Download PDFInfo
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- CN102950522B CN102950522B CN201210472731.7A CN201210472731A CN102950522B CN 102950522 B CN102950522 B CN 102950522B CN 201210472731 A CN201210472731 A CN 201210472731A CN 102950522 B CN102950522 B CN 102950522B
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Abstract
The invention discloses a kind of cold drawing die arrangement for grinding and method, this device comprises stand, floating platform and elastic pressuring spring, and described stand comprises base and is fixed on the column on base, arranges an endoporus in the middle of column; Described floating platform comprises workbench and is fixed on the sleeve pipe on workbench, and sleeve pipe and column matched in clearance, be fixed with an alignment pin in the middle part of sleeve pipe, elastic pressuring spring is arranged in the endoporus of column, and its one end is set on alignment pin.The present invention has following beneficial effect: because of the mould to be repaired on this device, be placed on floating platform and can float in the horizontal plane, in grinding process, the axis energy automatic capturing of work nib and bistrique dead in line, guarantee grinding force equiblibrium mass distribution on whole reconditioning face; And grinding force size can be determined according to mold material, damaged condition, abrasive properties, carry out adjustment and effectively control, substantially increase grinding efficiency and grinding quality, reconditioning precision is high.
Description
Technical field
The invention belongs to Making mold maintenance field, be specifically related to a kind of cold drawing die arrangement for grinding and method, the reconditioning of particularly suitable high accuracy, best bright finish Tube Drawing external mold, the reconditioning of the high precision steel tube cold-drawn external mold of such as glomerocryst material.
Background technology
High precision steel tube cold-drawn external mold, due to the dimensional accuracy of draw product and surface quality requirements high, when mould is slightly scared, wearing and tearing, or when adhering to tiny graininess foreign material, all can produce waster, cannot normally use, serious can only scrap.Slight can be repaired by the method for grinding.
Traditional grinding method: mould to be repaired is fixed in the scroll chuck of lathe, is arranged on bistrique on feed support, regulates feed support, is stretched into by bistrique in nib, add grinding fluid at grinding face, starts lathe and carries out grinding.Because the relative position between bistrique and nib is by manually by regulating feed support to set, be difficult to guarantee that bistrique is coaxial with nib, cause the grinding force at each position of whole nib uneven, repairing effect is poor.Supplement grinding fluid with special purpose device to grinding face in grinding, just can remain on grinding fluid on grinding face uninterrupted.
Summary of the invention
The object of the invention is to the defect overcoming above-mentioned prior art, provide a kind of grinding force balanced, controlled, grinding process does not need supplementary grinding fluid, precisely can control the device and method of mould reconditioning precision.
Technical scheme of the present invention comprises device section and method part, specific as follows:
A kind of cold drawing die arrangement for grinding, comprises stand, floating platform and elastic pressuring spring, and described stand comprises base and is fixed on the column on base, arranges an endoporus in the middle of column; Described floating platform comprises workbench and is fixed on the sleeve pipe on workbench, sleeve pipe and column matched in clearance, and be fixed with an alignment pin in the middle part of sleeve pipe, elastic pressuring spring is arranged in the endoporus of column, and its one end is set on alignment pin; Pressure display unit is provided with between described floating platform and stand.
Pressure display unit is made up of the scale be arranged on column and the dynamic chi be arranged on sleeve pipe, two chis are parallel to be drawn close, scale is marked with scale, dynamic chi pointer position is adjustable, to show the relative displacement of floating platform on stand, through adding on floating platform after counterweight is demarcated, displacement is converted into grinding force, pressure display unit zero-bit is adjustable.
A kind of cold drawing die grinding method, concrete steps are as follows:
Be fixed in drill chuck by the bistrique matched with die draft to be grinding, the outlet side of grinding tool to be repaired is downward, is placed on the floating platform of above-mentioned cold drawing die arrangement for grinding; The arrangement for grinding that floating platform placed mould to be repaired is put on the work top of drilling machine, this device mobile, after the work nib inlet side of mould to be repaired is aligned bistrique, this device of anchoring on Drilling machines bench face; Pressure display unit on device is adjusted to zero-bit; Grinding fluid is added die inlet to be repaired; The selected speed of mainshaft, starts drilling machine, and the handle of operation drill press spindle, stretches into nib to be repaired by bistrique; Now, mould to be repaired also automatically can be located, to make the whole reconditioning face stress equalization of mold work nib by horizontal float on the floating platform of device; When mould is on workbench during position stability, operating grip main shaft is progressively exerted pressure downwards, grinding force increases thereupon, its large I reads from pressure display unit, when the size of grinding force meet grinding process require time, locking main spindle's, according to the real surface state of mould to be repaired, determine the reconditioning time, control grinding face temperature in grinding process at 150 DEG C-250 DEG C.
Described grinding divides two steps to carry out:
The first step, corase grind: with 1 weight portion W20(20 ~ 14 μm) diadust, 2 weight portion potassium permanganate mix well, add 1-3 weight parts water furnishing pasty state grinding fluid, be added on the grinding face of bistrique and internal mold, grinding 2 ~ 8 hours;
Second step, polishing: with by 1 weight portion W1.0(1.0 ~ 0.5 μm) diadust, 2 weight portion potassium permanganate mix well, add 1-3 weight parts water furnishing pasty state grinding fluid, be added on the grinding face of bistrique and internal mold, polishing 2 ~ 6 hours.
The present invention is a kind of grinding method of cold drawing die, the reconditioning of particularly suitable high accuracy, high rigidity Tube Drawing external mold, the reconditioning of the high precision steel tube cold-drawn external mold of such as glomerocryst material.Because glomerocryst mould has high anti-wear performance, be often used in the finished product road of high accuracy, best bright finish cold drawn steel.Because of the mould to be repaired on this device, be placed on floating platform and can float in the horizontal plane, in grinding process, the axis energy automatic capturing of work nib and bistrique dead in line, guarantee grinding force equiblibrium mass distribution on whole reconditioning face, and grinding force size can be determined according to mold material, damaged condition, abrasive properties, carry out adjustment and effectively control, substantially increase grinding efficiency and grinding quality, reconditioning precision is high.With device of the present invention and grinding method, because grinding force is balanced, controlled, grinding process does not need supplementary grinding fluid, and grinding face is immersed in grinding fluid, potassium permanganate (KMnO in grinding liquid formulation
4) under the state of temperature 150 ~ 250 DEG C, decompose generation oxygen (O
2), there is strong oxidizing property and corrosivity, substantially increase the effect of grinding.With the mould of this invention grinding, surface smoothness R
a0.01 ~ 0.02 μm can be reached.
Accompanying drawing explanation
Fig. 1 is the structural representation of cold drawing die arrangement for grinding of the present invention.
Detailed description of the invention
Embodiment:
Cold drawing die arrangement for grinding of the present invention as shown in Figure 1, comprises stand 1, floating platform 2 and elastic pressuring spring 3, the column 12 that stand 1 comprises base 11 and is fixed on base, arranges an endoporus 13 in the middle of column; The sleeve pipe 22 that floating platform 2 comprises workbench 21 and is fixed on workbench, casing inner diameter is slightly larger than column external diameter and be set in outside column 12, the two matched in clearance, an alignment pin 23 is fixed with in the middle part of sleeve pipe, elastic pressuring spring 3 is arranged in the endoporus of column 12, and its one end is set on alignment pin 23.
Pressure display unit 4 is made up of the scale 41 be arranged on column 12 and the dynamic chi 42 arranged on casing 22, two chis are parallel to be drawn close, scale is marked with scale, and dynamic chi is provided with the adjustable pointer in a position, and pointer can show relative displacement when floating platform moves on stand.Through adding counterweight on floating platform, floating platform floats downwards, and the scale on scale can be become grinding force by the indicating positions pressing pointer on chi.Because pointer position is adjustable, after floating platform is placed mould to be repaired, dynamic chi pointer is transferred to zero-bit.
Use said apparatus to carry out reconditioning to a kind of Φ 8mm high precision steel tube cold-drawn external mold below, this deformed area, die inlet side is slightly scared, and adheres to a small amount of, tiny graininess foreign material, have impact on product surface quality, must carry out reconditioning.
Be fixed in drill chuck by the bistrique that this Φ 8mm external mold mates, 45 round steel of bistrique annealed condition are processed into, and bistrique shape and die draft to be repaired coincide; The inlet side treating mill external mold upwards, is placed on the floating platform of above-mentioned arrangement for grinding, is put into by arrangement for grinding on the work top of drilling machine; This device mobile, after the work nib inlet side of mould to be repaired is aligned bistrique, this device of anchoring on Drilling machines bench face; By the grinding force scale pointer regulation on device to zero-bit; Grinding fluid is added die inlet to be repaired; The selected speed of mainshaft 1450 revs/min, starts drilling machine, and the handle of operation drill press spindle, stretches into nib to be repaired by bistrique.Now, mould to be repaired also automatically can be located, to make the whole reconditioning face stress equalization of mold work nib by horizontal float on the floating platform of device; When mould is on workbench during position stability, operating grip main shaft is progressively exerted pressure downwards, and grinding force increases thereupon.Its large I reads from pressure display unit, when grinding force reaches technological requirement, and locking main spindle's.The arrangement for grinding Elastic stage clip 3 of the present embodiment adopts the 65Mn coil of wire of Φ 2.5mm to become, profile Φ 30 × 150mm, pitch 15mm, demarcates elastic force 2kg/10mm.
In grinding process, mould can generate heat, and optimum temperature is 150 ~ 250 DEG C, as too low in found mold temperature, suitably should increase grinding force or improve grinding speed, to reach best grinding state.
By technological requirement, grinding divides two steps to carry out: first use 1 part of W20(20 ~ 14 μm) diadust and 2 parts of potassium permanganate (KMnO
4) mix well, be added on the grinding face of bistrique and internal mold after adding suitable quantity of water furnishing pasty state, roughly grind, grinding checks surface, reconditioning face after 2 ~ 8 hours, as graininess foreign material disappear, then use instead by 1 part of W1.0(1.0 ~ 0.5 μm) diadust and 2 parts of potassium permanganate (KMnO
4) add water the grinding fluid prepared, polishing, after 2 ~ 6 hours, checks external mold reconditioning surface state, surface smoothness R
a0.01 ~ 0.02 μm can be reached.
Associated technical parameters:
The above is preferred embodiment of the present invention, but the present invention should not be confined to the content disclosed in this embodiment and accompanying drawing.The equivalence completed under not departing from principles of this disclosure so every or amendment, all fall into the scope of protection of the invention.
Claims (2)
1. a cold drawing die grinding method, is characterized in that, concrete steps are as follows:
Prepare cold drawing die arrangement for grinding, described cold drawing die arrangement for grinding comprises stand (1), floating platform (2) and elastic pressuring spring (3), described stand (1) comprises base (11) and is fixed on the column (12) on base, arranges an endoporus in the middle of column; Described floating platform (2) comprises workbench (21) and is fixed on the sleeve pipe (22) on workbench, sleeve pipe (22) and column (12) matched in clearance, an alignment pin (23) is fixed with in the middle part of sleeve pipe, elastic pressuring spring (3) is arranged in the endoporus of column (12), and its one end is set on alignment pin (23); Pressure display unit (4) is provided with between described floating platform (2) and stand (1); Pressure display unit (4) is made up of the scale (41) be arranged on column (12) and the dynamic chi (42) be arranged on sleeve pipe (22), two chis are parallel to be drawn close, scale (41) is marked with scale, dynamic chi (42) pointer position is adjustable, to show floating platform (2) relative displacement on stand, through adding on floating platform (2) after counterweight is demarcated, displacement is converted into grinding force, pressure display unit (4) zero-bit is adjustable;
Be fixed in drill chuck by the bistrique matched with die draft to be grinding, the outlet side of mould to be repaired is downward, is placed on the floating platform (2) of described cold drawing die arrangement for grinding; The arrangement for grinding that floating platform (2) placed mould to be repaired is put on the work top of drilling machine, this device mobile, after the work nib inlet side of mould to be repaired is aligned bistrique, this device of anchoring on Drilling machines bench face; By dynamic for the pressure display unit (4) on device chi (42) pointer regulation to zero-bit; Grinding fluid is added die inlet to be repaired; The selected speed of mainshaft, starts drilling machine, and the handle of operation drill press spindle, stretches into nib to be repaired by bistrique; Now, mould to be repaired also can be located at the upper horizontal float of the floating platform of device (2), to make the whole reconditioning face stress equalization of mold work nib automatically; When mould is on workbench during position stability, operating grip main shaft is progressively exerted pressure downwards, grinding force increases thereupon, its large I reads from pressure display unit (4), when the size of grinding force meet grinding process require time, locking main spindle's, according to the real surface state of mould to be repaired, determine the reconditioning time, control grinding face temperature in grinding process at 150 DEG C-250 DEG C.
2. cold drawing die grinding method according to claim 1, is characterized in that, described grinding divides two steps to carry out:
The first step, corase grind: mix well with 1 weight portion W20 diadust, 2 weight portion potassium permanganate, add 1-3 weight parts water furnishing pasty state grinding fluid, be added on the grinding face of bistrique and internal mold, grinding 2 ~ 8 hours;
Second step, polishing: mix well with by 1 weight portion W1.0 diadust, 2 weight portion potassium permanganate, adds 1-3 weight parts water furnishing pasty state grinding fluid, is added on the grinding face of bistrique and internal mold, polishing 2 ~ 6 hours.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210472731.7A CN102950522B (en) | 2012-11-20 | 2012-11-20 | A kind of cold drawing die arrangement for grinding and method |
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|---|---|---|---|
| CN201210472731.7A CN102950522B (en) | 2012-11-20 | 2012-11-20 | A kind of cold drawing die arrangement for grinding and method |
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| CN102950522A CN102950522A (en) | 2013-03-06 |
| CN102950522B true CN102950522B (en) | 2016-01-27 |
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| CN104084747B (en) * | 2014-06-13 | 2016-05-18 | 唐山市丰南区天泽科技有限公司 | A kind of restorative procedure of inner die for cold-drawn process |
| CN105538132B (en) * | 2015-12-10 | 2017-10-20 | 哈尔滨理工大学 | Constant force griding instrument is used in a kind of car panel die type face grinding |
| CN106181650A (en) * | 2016-08-24 | 2016-12-07 | 吉林省北欧重型机械股份有限公司 | Universal telescopic kerb grinding tool actuating device |
| CN108081099A (en) * | 2017-12-13 | 2018-05-29 | 杨季维 | Electromechanical integration polishing machine |
| CN114603482B (en) | 2020-12-03 | 2023-03-21 | 长鑫存储技术有限公司 | Pressure detection system and pressure detection method |
| CN114603474B (en) * | 2020-12-03 | 2023-06-09 | 长鑫存储技术有限公司 | Pressure detection system |
| US12042902B2 (en) | 2020-12-03 | 2024-07-23 | Changxin Memory Technologies, Inc. | Force measurement system |
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Address after: 201400, 858, five-star village, South Bridge Town, Shanghai, Fengxian District Applicant after: SHANGHAI FENGXIAN STEEL PIPE FACTORY Address before: 201400, 858, five-star village, South Bridge Town, Shanghai, Fengxian District Applicant before: Shanghai Fengxian District Steel Pipe Factory |
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Free format text: CORRECT: APPLICANT; FROM: FENGXIAN STEEL TUBING MILL, SHANGHAI TO: SHANGHAI FENGXIAN STEEL TUBE CO., LTD. |
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