CN102335889A - Automatic opening and closing die for shaping grinding wheel - Google Patents
Automatic opening and closing die for shaping grinding wheel Download PDFInfo
- Publication number
- CN102335889A CN102335889A CN2011102809125A CN201110280912A CN102335889A CN 102335889 A CN102335889 A CN 102335889A CN 2011102809125 A CN2011102809125 A CN 2011102809125A CN 201110280912 A CN201110280912 A CN 201110280912A CN 102335889 A CN102335889 A CN 102335889A
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- mould
- seat
- girth sheets
- abrasive wheel
- die
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Abstract
The invention discloses an automatic opening and closing die for shaping a grinding wheel, comprising a die seat, wherein a die ring substrate is arranged above the die seat; a back-pressure elastic device is arranged between the die ring substrate and the die seat; the die ring substrate is circumferentially provided with at least three die ring plate fitting seats; the die ring plate fitting seats are respectively fixedly provided with die ring plates; the die ring plates form an intact die ring of the grinding wheel shaping die cavity; a die ring opening and closing device is arranged among the die ring substrate and the die ring plate fitting seats; the bottom of the grinding wheel shaping die cavity is provided with a lower template; the lower template is arranged on a bearing plate; the bottom of the bearing plate is fixedly provided with a back pressure stand column which is supported on the die seat; the die seat is fixedly provided with a grinding wheel shaping core column which penetrates through the bearing plate, the lower template and the grinding wheel shaping die cavity; and an upper die pressing head installed on a press head is arranged above the grinding wheel shaping die cavity. After the machining process is finished, the die ring plate is turned over to be opened, a grinding wheel blank can be directly taken out to prevent from rubbing and damaging the die ring in the demoulding process, and production efficiency is high.
Description
Technical field
The present invention relates to a kind of abrasive wheel forming mould.
Background technology
As shown in Figure 6 and referring to Fig. 7; Tradition abrasive wheel forming mould comprises lower bolster 5, abrasive wheel forming stem stem 8, cope match-plate pattern 18 and mould circle 21; Cope match-plate pattern 18 is located at mould circle inner chamber top, and lower bolster 5 is located at mould circle inner chamber bottom, and cope match-plate pattern 18 is respectively equipped with stem stem installing hole 17 with lower bolster 5 centers; Abrasive wheel forming stem stem 8 two ends are sleeved on the stem stem installing hole 17 of cope match-plate pattern 18 and lower bolster 5; Be placed with upper surface on the said cope match-plate pattern 18 and exceed the trim ring 26 of said mould circle 21, the top of said trim ring 26 is corresponding to the pressure head, and the external diameter of said pressure head 24 is greater than the internal diameter of said mould circle 21.
,, comprise the steps: during the moulding of emery wheel blank to shown in Figure 10 like Fig. 7
The first step is as shown in Figure 7; Place cushion block 20 in mould circle 21 lower edges, abrasive wheel forming stem stem 8 is fixed on the stem stem installing hole of lower bolster, abrasive material is put into abrasive wheel forming die cavity 9; Abrasive material is stirred and the equating arrangement; Cover template 18 then, on cope match-plate pattern 18, place trim ring 26 again, the upper surface of said trim ring 26 exceeds said mould circle 21.
Second step is as shown in Figure 8, and mould is pushed forcing press, and pressure head 24 presses down said trim ring 26; Said trim ring 26 promotes said cope match-plate pattern 18 and moves downward; Be positioned at abrasive material downward compacting from top of abrasive wheel forming die cavity 9, when the pressure head is pressed in 21 last times of said mould circle for 24 times, pressure head 24 no longer moves downward; Press on the abrasive material and finish, this moment, the density of abrasive material after pressure forming on abrasive wheel forming die cavity 9 tops was bigger.
The 3rd step is as shown in Figure 9, lifts pressure head 24, and cushion block 20 is removed, and has raised mould circle 21 because of cushion block 20, and mould circle 21 has had downward space.
The 4th step is shown in figure 10; The starting pressure machine; Pressure head, mould circle 21, trim ring 26 and cope match-plate pattern 18 move downward together; Lower bolster 5 moves upward with respect to mould circle 21, then compacting the abrasive material of abrasive wheel forming die cavity 9 bottoms, make that the emery wheel blank compacted density in the abrasive wheel forming die cavity 9 is even.
The 5th step moved on to mould on the dedicated, carried out stripping operation; At first manual work is beaten abrasive wheel forming stem stem 8 and mould circle 21 respectively and is gone out from cope match-plate pattern, emery wheel blank and lower bolster; Remove cope match-plate pattern then, place emery wheel blank supporting plate, again the emery wheel blank is overturn; Remove lower bolster, the emery wheel blank is placed on the moulding of promptly accomplishing the emery wheel blank on the emery wheel blank storage rack together with emery wheel blank supporting plate.
The shortcoming of prior art is:
1. the forcing press in forming process, all the other operations are all artificial to be accomplished, and complex steps is complicated, and production efficiency is low, is inappropriate for production in enormous quantities.
2. produce bigger friction at knockout course medium plain emery wheel blank outer surface and mould circle 21 inner surfaces, mould circle inner surface very easily weares and teares, and has had a strong impact on the service life of mould circle 21, and the size of emery wheel blank is changed.
3. need manual work to beat at knockout course medium plain emery wheel moulding stem stem 8 and go out, consume operating personnel's muscle power in a large number, production efficiency is lower.
4. the security of emery wheel blank moulding is relatively poor.
Summary of the invention
Technical problem to be solved by this invention provides the abrasive wheel forming automatically opening and closing mould that a kind of difficult generation friction damage, automaticity are high, production efficiency is high.
For solving the problems of the technologies described above, technical scheme of the present invention is: the abrasive wheel forming automatically opening and closing mould, comprise the mould seat, and said mould seat top is provided with mould cycle basis seat, is provided with the back-pressure elastic device between said mould cycle basis seat and the said mould seat; Circumferentially be provided with at least three mould girth sheets mount pads on the said mould cycle basis seat; Be installed with the mould girth sheets respectively on the said mould girth sheets mount pad; Said mould girth sheets is formed the mould circle of complete abrasive wheel forming die cavity, is provided with mould girth sheets closing device between said mould cycle basis seat and the said mould girth sheets mount pad; The bottom of said abrasive wheel forming die cavity is provided with lower bolster; Said lower bolster is placed on the bearing plate; The bottom of said bearing plate is installed with the back-pressure pillar; Said back-pressure shore supports is installed with the abrasive wheel forming stem stem that passes said bearing plate, said lower bolster and said abrasive wheel forming die cavity on the said mould seat on said mould seat, the top of said abrasive wheel forming die cavity is provided with the patrix pressure head that is installed on the pressure head.
As optimized technical scheme, said mould girth sheets mount pad circumferentially is evenly arranged on the said mould cycle basis seat.
As optimized technical scheme; Said patrix pressure head comprises the patrix panel seat that is fixedly mounted on the pressure head; Be installed with the cope match-plate pattern that cooperates with the mould ring gap under the said patrix panel seat, the bottom surface of said patrix panel seat be provided with said mould circle on the plane transmit the pressure contact-making surface of pressure.
As optimized technical scheme; Said back-pressure elastic device comprises the lead that is fixedly mounted on the said mould seat; Said mould cycle basis seat is provided with the pilot hole that cooperates with said lead; The top of said lead is provided with mould cycle basis seat stopping means, is set with the back-pressure spring on the lead between said mould seat and the said mould cycle basis seat.
As optimized technical scheme, said mould girth sheets detachably is fixedly mounted on the said mould girth sheets mount pad.
As optimized technical scheme, said mould girth sheets mount pad and said mould girth sheets are integral structure.
As optimized technical scheme; Said mould girth sheets closing device comprises the flip-arm that is hinged between the said mould cycle basis seat and the said mould girth sheets mount pad outside; Said mould girth sheets mount pad inboard is hinged on respectively on the folding drive plate; Said folding drive plate is connected with folding driving mechanism, and said folding drive plate is provided with the hole that supplies said back-pressure pillar and said abrasive wheel forming stem stem to pass.
As optimized technical scheme, said folding driving mechanism is a hydraulic cylinder.
Owing to adopted technique scheme, the abrasive wheel forming automatically opening and closing mould comprises the mould seat, and said mould seat top is provided with mould cycle basis seat, is provided with the back-pressure elastic device between said mould cycle basis seat and the said mould seat; Circumferentially be provided with at least three mould girth sheets mount pads on the said mould cycle basis seat; Be installed with the mould girth sheets respectively on the said mould girth sheets mount pad; Said mould girth sheets is formed the mould circle of complete abrasive wheel forming die cavity, is provided with mould girth sheets closing device between said mould cycle basis seat and the said mould girth sheets mount pad; The bottom of said abrasive wheel forming die cavity is provided with lower bolster; Said lower bolster is placed on the bearing plate; The bottom of said bearing plate is installed with the back-pressure pillar; Said back-pressure shore supports is installed with the abrasive wheel forming stem stem that passes said bearing plate, said lower bolster and said abrasive wheel forming die cavity on the said mould seat on said mould seat, the top of said abrasive wheel forming die cavity is provided with the patrix pressure head that is installed on the pressure head; Machine the upset of back mould girth sheets closing device drive mould girth sheets and open, the emery wheel blank is directly deviate from the abrasive wheel forming die cavity; Advantage of the present invention is:
1. whole forming process is all accomplished automatically, and production efficiency is higher, is suitable for producing in enormous quantities.
2. do not have relative motion at knockout course medium plain emery wheel blank outer surface and mould circle inner surface, can not produce friction, mould circle inner surface is not easy to wear, has improved the service life of mould circle greatly, and the emery wheel blank uniformity of moulding is better.
3. the abrasive wheel forming stem stem is deviate from from the emery wheel blank automatically, no longer needs manual work to beat and goes out, and greatly reduces labour intensity.
4. the security in the emery wheel blank forming process improves greatly.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the structural representation of embodiment of the invention mould girth sheets closing device;
Fig. 3 is the side view of Fig. 2;
Fig. 4 is an embodiment of the invention matched moulds view;
Fig. 5 is an embodiment of the invention die opening state sketch map;
Fig. 6 is the structural representation of existing design in the background technology;
Fig. 7-Figure 10 is that formed in mould sketch map is carried out in existing design in the background technology;
Among the figure: 1-mould seat; 2-mould cycle basis seat; 3-mould girth sheets mount pad; 4-mould girth sheets; The 5-lower bolster; The 6-bearing plate; 7-back-pressure pillar; 8-abrasive wheel forming stem stem; 9-abrasive wheel forming die cavity; 10-patrix pressure head; The 11-lead; The 12-pilot hole; 13-back-pressure spring; The 14-flip-arm; 15-folding drive plate; The 16-hydraulic cylinder; 17-stem stem installing hole; The 18-cope match-plate pattern; 19-patrix panel seat; The 20-cushion block; 21-mould circle; 22-piston rod installing hole; The 23-piston rod; 24-pressure head; 25-pressure contact-making surface; The 26-trim ring.
The specific embodiment
Like Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, the abrasive wheel forming automatically opening and closing mould comprises mould seat 1, and said mould seat 1 top is provided with mould cycle basis seat 2, is provided with the back-pressure elastic device between said mould cycle basis seat 2 and the said mould seat 1; Circumferentially be provided with three mould girth sheets mount pads 3 on the said mould cycle basis seat 2, said mould girth sheets mount pad 3 circumferentially is evenly arranged on the said mould cycle basis seat 2.Be installed with mould girth sheets 4 respectively on the said mould girth sheets mount pad 3, said mould girth sheets 4 detachably is fixedly mounted on the said mould girth sheets mount pad 3, and said mould girth sheets 4 can be an integral structure with said mould girth sheets mount pad also; Dismountable said mould girth sheets 4 its advantages are to make the emery wheel blank of various outer diameter through changing the mould girth sheets of different inner diameters.Said mould girth sheets 4 is formed the mould circle of complete abrasive wheel forming die cavity 9, is provided with mould girth sheets closing device between said mould cycle basis seat 2 and the said mould girth sheets mount pad 3; The bottom of said abrasive wheel forming die cavity 9 is provided with lower bolster 5; Said lower bolster 5 is placed on the bearing plate 6; The bottom of said bearing plate 6 is installed with back-pressure pillar 7; Said back-pressure pillar 7 is supported on the said mould seat 1, is installed with the abrasive wheel forming stem stem 8 that passes said bearing plate 6, said lower bolster 5 and said abrasive wheel forming die cavity 9 on the said mould seat 1, and the top of said abrasive wheel forming die cavity 9 is provided with the patrix pressure head 10 that is installed on the pressure head 24.
Said patrix pressure head 10 comprises the patrix panel seat 19 that is fixedly mounted on the pressure head 24; Said patrix panel seat is installed with the cope match-plate pattern 18 that cooperates with the mould ring gap for 19 times; The bottom surface of said patrix panel seat 19 be provided with said mould circle on the plane transmit the pressure contact-making surface 25 of pressure; Said pressure head also can doublely be done said patrix panel seat; At this moment, be installed with the cope match-plate pattern that cooperates with the mould ring gap under the said pressure head, the lower surface of said pressure head be provided with said mould circle on the plane transmit the pressure contact-making surface of pressure.
Said back-pressure elastic device comprises the lead 11 that is fixedly mounted on the said mould seat 1; Said mould cycle basis seat 2 is provided with the pilot hole 12 that cooperates with said lead 11; The top of said lead 11 is provided with mould cycle basis seat stopping means; Said mould cycle basis seat stopping means comprises the stop nut that is located at said lead upper end, is set with back-pressure spring 13 on the lead 11 between said mould seat 1 and the said mould cycle basis seat 2.
Said mould girth sheets closing device comprises the flip-arm 14 that is hinged between the said mould cycle basis seat 2 and said mould girth sheets mount pad 3 outsides; Said mould girth sheets mount pad 3 inboards are hinged on respectively on the folding drive plate 15; Said folding drive plate 15 is connected with folding driving mechanism, and said folding drive plate 15 is provided with the hole that supplies said back-pressure pillar 7 and said abrasive wheel forming stem stem 8 to pass.
Said folding driving mechanism is a hydraulic cylinder 16, and said hydraulic cylinder comprises three piston rods 23, and said piston rod 23 upper ends are installed in respectively on the piston rod installing hole 22; Support said folding drive plate lower surface, mould girth sheets closing device has been realized the automatic folding of mould girth sheets, during matched moulds; Folding driving mechanism drives the folding drive plate and moves downward; The mould girth sheets mount pad 3 that is hinged with the folding drive plate draws in to the centre downwards under the assistance of flip-arm, accomplishes matched moulds; During die sinking, folding driving mechanism drives the folding drive plate and moves upward, and mould girth sheets mount pad 3 is outwards upset upwards, accomplishes die sinking.
When carrying out the abrasive wheel forming operation; Under the matched moulds state; Abrasive material is fills up to the abrasive wheel forming die cavity, and said pressure head 24 drives patrix pressure head 10 and moves downward, and is positioned at abrasive material downward compacting from top of abrasive wheel forming die cavity 9; Effect because of the back-pressure elastic device; The gap that has vertical direction between the mould circle that the mould girth sheets is formed and the said bearing plate 6, along with the pressure head continue move downward, the pressure contact-making surface 25 that the forcing press head drives patrix panel seat 19 acts on the mould circle upper surface of mould girth sheets composition mutually; The elastic bearing effect that the mould circle that mould girth sheets 4 is formed overcomes the back-pressure elastic device moves downward with pressure head 24, patrix pressure head 10; Emery wheel blank in the die cavity will be positioned at the abrasive material compacting of abrasive wheel forming die cavity 9 bottoms again because the mould circle that the support of bearing plate 6 is formed with respect to the mould girth sheets is upwards pushed by bearing plate, make that the emery wheel blank compacted density in the abrasive wheel forming die cavity 9 is even.
Machine the upset of back mould girth sheets closing device drive mould girth sheets and open, the emery wheel blank is directly deviate from the abrasive wheel forming die cavity, and advantage of the present invention comprises:
1. whole forming process is all accomplished automatically, and production efficiency is higher, is suitable for producing in enormous quantities.
2. do not have relative motion at knockout course medium plain emery wheel blank outer surface and mould circle 21 inner surfaces, can not produce friction, mould circle inner surface is not easy to wear, has improved the service life of mould circle greatly, and the emery wheel blank uniformity of moulding is better.
3. the abrasive wheel forming stem stem is deviate from from the emery wheel blank automatically, no longer needs manual work to beat and goes out, and greatly reduces labour intensity.
4. the security in the emery wheel blank forming process improves greatly.
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (8)
1. the abrasive wheel forming automatically opening and closing mould comprises the mould seat, it is characterized in that: said mould seat top is provided with mould cycle basis seat, is provided with the back-pressure elastic device between said mould cycle basis seat and the said mould seat; Circumferentially be provided with at least three mould girth sheets mount pads on the said mould cycle basis seat; Be installed with the mould girth sheets respectively on the said mould girth sheets mount pad; Said mould girth sheets is formed the mould circle of complete abrasive wheel forming die cavity, is provided with mould girth sheets closing device between said mould cycle basis seat and the said mould girth sheets mount pad; The bottom of said abrasive wheel forming die cavity is provided with lower bolster; Said lower bolster is placed on the bearing plate; The bottom of said bearing plate is installed with the back-pressure pillar; Said back-pressure shore supports is installed with the abrasive wheel forming stem stem that passes said bearing plate, said lower bolster and said abrasive wheel forming die cavity on the said mould seat on said mould seat, the top of said abrasive wheel forming die cavity is provided with the patrix pressure head that is installed on the pressure head.
2. abrasive wheel forming automatically opening and closing mould as claimed in claim 1 is characterized in that: said mould girth sheets mount pad circumferentially is evenly arranged on the said mould cycle basis seat.
3. abrasive wheel forming automatically opening and closing mould as claimed in claim 1; It is characterized in that: said patrix pressure head comprises the patrix panel seat that is fixedly mounted on the pressure head; Be installed with the cope match-plate pattern that cooperates with the mould ring gap under the said patrix panel seat, the bottom surface of said patrix panel seat be provided with said mould circle on the plane transmit the pressure contact-making surface of pressure.
4. abrasive wheel forming automatically opening and closing mould as claimed in claim 1; It is characterized in that: said back-pressure elastic device comprises the lead that is fixedly mounted on the said mould seat; Said mould cycle basis seat is provided with the pilot hole that cooperates with said lead; The top of said lead is provided with mould cycle basis seat stopping means, is set with the back-pressure spring on the lead between said mould seat and the said mould cycle basis seat.
5. abrasive wheel forming automatically opening and closing mould as claimed in claim 1 is characterized in that: said mould girth sheets detachably is fixedly mounted on the said mould girth sheets mount pad.
6. abrasive wheel forming automatically opening and closing mould as claimed in claim 1 is characterized in that: said mould girth sheets mount pad and said mould girth sheets are integral structure.
7. like the described abrasive wheel forming automatically opening and closing mould of the arbitrary claim of claim 1 to 6; It is characterized in that: said mould girth sheets closing device comprises the flip-arm that is hinged between the said mould cycle basis seat and the said mould girth sheets mount pad outside; Said mould girth sheets mount pad inboard is hinged on respectively on the folding drive plate; Said folding drive plate is connected with folding driving mechanism, and said folding drive plate is provided with the hole that supplies said back-pressure pillar and said abrasive wheel forming stem stem to pass.
8. abrasive wheel forming automatically opening and closing mould as claimed in claim 7 is characterized in that: said folding driving mechanism is a hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102809125A CN102335889A (en) | 2011-09-09 | 2011-09-09 | Automatic opening and closing die for shaping grinding wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102809125A CN102335889A (en) | 2011-09-09 | 2011-09-09 | Automatic opening and closing die for shaping grinding wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102335889A true CN102335889A (en) | 2012-02-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102809125A Pending CN102335889A (en) | 2011-09-09 | 2011-09-09 | Automatic opening and closing die for shaping grinding wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102335889A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117935A (en) * | 2014-07-18 | 2014-10-29 | 卡帕亚洲科技（嘉善）有限公司 | Fixing support for grinding wheel production |
| CN106392919A (en) * | 2016-11-08 | 2017-02-15 | 郭飚 | Embossing machine |
| CN111975662A (en) * | 2020-08-13 | 2020-11-24 | 江苏丰锐磨料磨具有限公司 | Grinding wheel grinding tool with stirring structure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5118269A (en) * | 1990-10-09 | 1992-06-02 | Cooper Tire & Rubber Company | Mold clamps for a vulcanization press |
| CN2255907Y (en) * | 1996-05-09 | 1997-06-11 | 第二砂轮厂深圳联合公司 | Combined fixed capacity moulds for grind wheels |
| US5645783A (en) * | 1996-04-19 | 1997-07-08 | Ansari; Naseem A. | Apparatus and method for molding grinding wheels |
| US20020167113A1 (en) * | 2000-03-15 | 2002-11-14 | Patent Holding Company | System for co-molding a thermoplastic material with a thermoplastic sandwich material and article produced thereby |
| CN101797726A (en) * | 2010-02-02 | 2010-08-11 | 卓士豪 | Grinding wheel die |
| CN201693789U (en) * | 2010-06-24 | 2011-01-05 | 河南龙威耐火材料有限公司 | Hydraulic forming machine |
| CN201792516U (en) * | 2010-05-27 | 2011-04-13 | 李新迎 | Automatic opening-closing concave mould |
| CN202240965U (en) * | 2011-09-09 | 2012-05-30 | 李新迎 | Automatic opening-closing mould for grinding wheel molding |
-
2011
- 2011-09-09 CN CN2011102809125A patent/CN102335889A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5118269A (en) * | 1990-10-09 | 1992-06-02 | Cooper Tire & Rubber Company | Mold clamps for a vulcanization press |
| US5645783A (en) * | 1996-04-19 | 1997-07-08 | Ansari; Naseem A. | Apparatus and method for molding grinding wheels |
| CN2255907Y (en) * | 1996-05-09 | 1997-06-11 | 第二砂轮厂深圳联合公司 | Combined fixed capacity moulds for grind wheels |
| US20020167113A1 (en) * | 2000-03-15 | 2002-11-14 | Patent Holding Company | System for co-molding a thermoplastic material with a thermoplastic sandwich material and article produced thereby |
| CN101797726A (en) * | 2010-02-02 | 2010-08-11 | 卓士豪 | Grinding wheel die |
| CN201792516U (en) * | 2010-05-27 | 2011-04-13 | 李新迎 | Automatic opening-closing concave mould |
| CN201693789U (en) * | 2010-06-24 | 2011-01-05 | 河南龙威耐火材料有限公司 | Hydraulic forming machine |
| CN202240965U (en) * | 2011-09-09 | 2012-05-30 | 李新迎 | Automatic opening-closing mould for grinding wheel molding |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117935A (en) * | 2014-07-18 | 2014-10-29 | 卡帕亚洲科技（嘉善）有限公司 | Fixing support for grinding wheel production |
| CN106392919A (en) * | 2016-11-08 | 2017-02-15 | 郭飚 | Embossing machine |
| CN106392919B (en) * | 2016-11-08 | 2019-01-04 | 郭飚 | Embossing machine |
| CN111975662A (en) * | 2020-08-13 | 2020-11-24 | 江苏丰锐磨料磨具有限公司 | Grinding wheel grinding tool with stirring structure |
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Application publication date: 20120201 |