CN102950522A - Device and method for grinding cold-drawing die - Google Patents
Device and method for grinding cold-drawing die Download PDFInfo
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- CN102950522A CN102950522A CN2012104727317A CN201210472731A CN102950522A CN 102950522 A CN102950522 A CN 102950522A CN 2012104727317 A CN2012104727317 A CN 2012104727317A CN 201210472731 A CN201210472731 A CN 201210472731A CN 102950522 A CN102950522 A CN 102950522A
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- grinding
- floating platform
- repaired
- bistrique
- mould
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- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a device and method for grinding a cold-drawing die. The device comprises a rack, a floating platform and an elastic compression spring, wherein the rack comprises a base and a vertical column which is fixed on the base; an inner hole is formed in the middle of the vertical column; the floating platform comprises a working platform and a sleeve which is fixed on the working platform; the sleeve is in clearance fit with the vertical column; a positioning pin is fixed at the middle of the sleeve; the elastic compression spring is arranged inside the inner hole of the vertical column; and one end of the elastic compression spring is sleeved on the positioning pin. The device has the beneficial effects that as the die to be polished on the device can float on the water level when being put on the floating platform, and the axis of a working die hole can be automatically aligned and overlapped with the axis of a grinding head in the grinding process, thereby ensuring that the grinding force is uniformly distributed on a whole grinding plane; and moreover the grinding force can be judged according to the die material, the damage degree and the grinding material performance so as to be effectively adjusted and controlled, the grinding efficiency and the grinding quality are greatly improved with high grinding precision.
Description
Technical field
The invention belongs to mould manufacturing maintenance field, be specifically related to a kind of cold drawing die arrangement for grinding and method, the reconditioning of external mold of particularly suitable high accuracy, best bright finish Tube Drawing, for example high precision steel tube cold-drawn of the glomerocryst material reconditioning of external mold.
Background technology
High precision steel tube cold-drawn external mold because that the dimensional accuracy of draw product and surface quality require is high, when mould slightly has scared, wearing and tearing, or when adhering to tiny graininess foreign material, all can produce waster, can't normally use, and serious can only scrap.Slight can be repaired with the method for grinding.
Traditional grinding method: mould to be repaired is fixed in the scroll chuck of lathe, bistrique is installed on the feed support, regulate feed support, bistrique is stretched in the nib, add grinding fluid at grinding face, start lathe and carry out grinding.Because the relative position between bistrique and nib is difficult to guarantee that by manually setting by regulating feed support bistrique and nib are coaxial, cause the grinding force at each position of whole nib uneven, repairing effect is poor.To replenish grinding fluid to grinding face with isolated plant in the grinding, just can remain on the grinding face grinding fluid uninterrupted.
Summary of the invention
The object of the invention is to overcome the defective of above-mentioned prior art, provide a kind of grinding force balanced, controlled, grinding process need not replenish grinding fluid, can precisely control the device and method of mould reconditioning precision.
Technical scheme of the present invention comprises device part and method part, and is 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 the column that is fixed on the base, and an endoporus is set in the middle of the column; Described floating platform comprises workbench and the sleeve pipe that is fixed on the workbench, sleeve pipe and column matched in clearance, and the sleeve pipe middle part is fixed with an alignment pin, and elastic pressuring spring is arranged in the endoporus of column, and the one end is set on the alignment pin; Be provided with pressure display unit between described floating platform and the stand.
Pressure display unit is made of the moving chi that is arranged on the scale on the column and be arranged on the sleeve pipe, two chis are parallel to be drawn close, scale is marked with scale, moving chi pointer position is adjustable, to show the relative displacement of floating platform on stand, after counterweight is demarcated displacement is converted into grinding force through adding at floating platform, the pressure display unit zero-bit is adjustable.
A kind of cold drawing die grinding method, concrete steps are as follows:
To be fixed on the bistrique that die draft to be grinding is complementary in the drill chuck, 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; To be put on the work top of drilling machine at the arrangement for grinding that floating platform has been placed mould to be repaired, mobile this device, the work nib inlet side of mould to be repaired aligned bistrique after, this device of anchoring on the Drilling machines bench face; Pressure display unit on the 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 with bistrique; At this moment, mould to be repaired can level float and automatically locate on the floating platform of device, so that the whole reconditioning face stress equalization of mold work nib; When mould on workbench during position stability, the 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 met grinding process and requires, the locking main spindle's was according to the real surface state of mould to be repaired, determine the reconditioning time, control grinding face temperature is at 150 ℃-250 ℃ in the grinding process.
Described grinding divided for two steps carried out:
The first step, corase grind: with 1 weight portion W20(20～14 μ m) diadust, 2 weight portion potassium permanganate are mixed well, and add 1-3 weight parts water furnishing pasty state grinding fluid, are added on the grinding face of bistrique and internal mold grinding 2～8 hours;
Second step, polishing: use by 1 weight portion W1.0(1.0～0.5 μ m) diadust, 2 weight portion potassium permanganate are mixed well, and add 1-3 weight parts water furnishing pasty state grinding fluid, are added on the grinding face of bistrique and internal mold, polish 2～6 hours.
The present invention is a kind of grinding method of cold drawing die, particularly suitable high accuracy, the cold-drawn of the high rigidity steel pipe reconditioning of external mold, for example high precision steel tube cold-drawn of the glomerocryst material reconditioning of external mold.Because the glomerocryst mould has high anti-wear performance, often is used in the finished product road of high accuracy, best bright finish cold drawn steel.Mould to be repaired on the Yin Ben device, be placed on the floating platform and can float at horizontal plane, in grinding process, axis energy automatic capturing and the bistrique dead in line of work nib, guarantee grinding force equiblibrium mass distribution on whole reconditioning face, and can determine the grinding force size according to mold material, damaged condition, abrasive properties, regulate and effectively control, greatly improved grinding efficiency and grinding quality, the reconditioning precision is high.With device of the present invention and grinding method, because grinding force is balanced, controlled, grinding process need not replenish grinding fluid, and grinding face is immersed in the grinding fluid, potassium permanganate (KMnO in the grinding liquid formulation
4) decomposition generation oxygen (O under the state of 150～250 ℃ of temperature
2), have strong oxidizing property and corrosivity, greatly improved the effect of grinding.With the mould of this invention grinding, surface smoothness R
aCan reach 0.01～0.02 μ m.
Description of drawings
Fig. 1 is the structural representation of cold drawing die arrangement for grinding of the present invention.
The specific embodiment
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, and stand 1 comprises base 11 and the column 12 that is fixed on the base, and an endoporus 13 is set in the middle of the column; Floating platform 2 comprises workbench 21 and the sleeve pipe 22 that is fixed on the workbench, casing inner diameter is slightly larger than the column external diameter and is set in outside the column 12, the two matched in clearance, the sleeve pipe middle part is fixed with an alignment pin 23, elastic pressuring spring 3 is arranged in the endoporus of column 12, and the one end is set on the alignment pin 23.
Pressure display unit 4 consists of by being arranged on the scale 41 on the column 12 and the moving chi 42 that is arranged on the sleeve pipe 22, two chis are parallel to be drawn close, scale is marked with scale, and moving chi is provided with a pointer that the position is adjustable, and pointer can show the relative displacement of floating platform when stand moves.Through adding counterweight at floating platform, floating platform floats downwards, and the indicating positions of pressing pointer on the chi can become grinding force with the scale on the scale.Because pointer position is adjustable, after floating platform is placed mould to be repaired, will moves the chi pointer and be transferred to zero-bit.
The below use said apparatus to a kind of Φ 8mm high precision steel tube cold-drawn carry out reconditioning with external mold, this die inlet side deformed area slightly has scared, and adheres to a small amount of, tiny graininess foreign material, has affected product surface quality, must carry out reconditioning.
The bistrique of this Φ 8mm external mold coupling is fixed in the drill chuck, and bistrique is processed into 45 round steel of annealed condition, and bistrique shape and die draft to be repaired coincide; The inlet side of external mold to be ground upwards is placed on the floating platform of above-mentioned arrangement for grinding, arrangement for grinding is put on the work top of drilling machine; Mobile this device, the work nib inlet side of mould to be repaired aligned bistrique after, this device of anchoring on the Drilling machines bench face; Grinding force scale pointer on the device is adjusted to zero-bit; Grinding fluid is added die inlet to be repaired; 1450 rev/mins of the selected speeds of mainshaft start drilling machine, and the handle of operation drill press spindle stretches into nib to be repaired with bistrique.At this moment, mould to be repaired can level float and automatically locate on the floating platform of device, so that the whole reconditioning face stress equalization of mold work nib; When mould on workbench during position stability, the operating grip main shaft is progressively exerted pressure downwards, grinding force increases thereupon.Its large I reads from pressure display unit, when grinding force reaches technological requirement, and the 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, and pitch 15mm demarcates elastic force 2kg/10mm.
In grinding process, mould can generate heat, and optimum temperature is 150～250 ℃, as finding that mold temperature is excessively low, should suitably increase grinding force or improve grinding speed, to reach best grinding state.
By technological requirement, grinding divided for two steps carried out: use first 1 part of W20(20～14 μ m) 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 reconditioning face surface after 2～8 hours, disappear such as the graininess foreign material, use instead again by 1 part of W1.0(1.0～0.5 μ m) diadust and 2 parts of potassium permanganate (KMnO
4) add the grinding fluid that water is prepared, polish after 2～6 hours, check external mold reconditioning surface state, surface smoothness R
aCan reach 0.01～0.02 μ m.
The correlation technique parameter:
The above is preferred embodiment of the present invention, but the present invention should not be confined to the disclosed content of this embodiment and accompanying drawing.So everyly do not break away from the equivalence of finishing under the principles of this disclosure or revise, all fall into the scope of protection of the invention.
Claims (4)
1. a cold drawing die arrangement for grinding is characterized in that, comprises stand (1), floating platform (2) and elastic pressuring spring (3), and described stand (1) comprises base (11) and is fixed on column (12) on the base, an endoporus is set in the middle of the column; Described floating platform (2) comprises workbench (21) and is fixed on sleeve pipe (22) on the workbench, sleeve pipe (22) and column (12) matched in clearance, the sleeve pipe middle part is fixed with an alignment pin (23), elastic pressuring spring (3) is arranged in the endoporus of column (12), and the one end is set on the alignment pin (23); Be provided with pressure display unit (4) between described floating platform (2) and the stand (1).
2. cold drawing die arrangement for grinding claimed in claim 1, it is characterized in that, pressure display unit (4) is made of the moving chi (42) that is arranged on the scale (41) on the column (12) and be arranged on the sleeve pipe (22), two chis are parallel to be drawn close, scale is marked with scale, and moving chi pointer position is adjustable, to show the relative displacement of floating platform on stand, after counterweight is demarcated displacement is converted into grinding force through adding at floating platform, the pressure display unit zero-bit is adjustable.
3. a cold drawing die grinding method is characterized in that, concrete steps are as follows:
To be fixed on the bistrique that die draft to be grinding is complementary in the drill chuck, the outlet side of grinding tool to be repaired is downward, is placed on the floating platform of cold drawing die arrangement for grinding as claimed in claim 1 or 2; To be put on the work top of drilling machine at the arrangement for grinding that floating platform has been placed mould to be repaired, mobile this device, the work nib inlet side of mould to be repaired aligned bistrique after, this device of anchoring on the Drilling machines bench face; The moving chi pointer of pressure display unit on the 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 with bistrique; At this moment, mould to be repaired can level float and automatically locate on the floating platform of device, so that the whole reconditioning face stress equalization of mold work nib; When mould on workbench during position stability, the 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 met grinding process and requires, the locking main spindle's was according to the real surface state of mould to be repaired, determine the reconditioning time, control grinding face temperature is at 150 ℃-250 ℃ in the grinding process.
4. cold drawing die grinding method claimed in claim 3 is characterized in that, described grinding divided for two steps carried 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: use by 1 weight portion W1.0 diadust, 2 weight portion potassium permanganate and mix well, add 1-3 weight parts water furnishing pasty state grinding fluid, be added on the grinding face of bistrique and internal mold, polished 2～6 hours.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102950522A true CN102950522A (en) | 2013-03-06 |
| CN102950522B CN102950522B (en) | 2016-01-27 |
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| CN201210472731.7A Active CN102950522B (en) | 2012-11-20 | 2012-11-20 | A kind of cold drawing die arrangement for grinding and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084747A (en) * | 2014-06-13 | 2014-10-08 | 唐山市丰南区天泽科技有限公司 | Repair method for cold drawing internal die |
| CN105538132A (en) * | 2015-12-10 | 2016-05-04 | 哈尔滨理工大学 | Constant-force grinding tool for grinding molded surface of vehicle covering part mold |
| 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 |
| WO2022116529A1 (en) * | 2020-12-03 | 2022-06-09 | 长鑫存储技术有限公司 | Pressure measuring system |
| US12042902B2 (en) | 2020-12-03 | 2024-07-23 | Changxin Memory Technologies, Inc. | Force measurement system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104084747A (en) * | 2014-06-13 | 2014-10-08 | 唐山市丰南区天泽科技有限公司 | Repair method for cold drawing internal die |
| 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 |
| CN105538132A (en) * | 2015-12-10 | 2016-05-04 | 哈尔滨理工大学 | Constant-force grinding tool for grinding molded surface of vehicle covering part mold |
| 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 |
| WO2022116529A1 (en) * | 2020-12-03 | 2022-06-09 | 长鑫存储技术有限公司 | Pressure measuring system |
| US12042902B2 (en) | 2020-12-03 | 2024-07-23 | Changxin Memory Technologies, Inc. | Force measurement system |
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| CN102950522B (en) | 2016-01-27 |
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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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