CN112059834B - Plane grinding device of hard alloy female die with steps - Google Patents
Plane grinding device of hard alloy female die with steps Download PDFInfo
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- CN112059834B CN112059834B CN202010837491.0A CN202010837491A CN112059834B CN 112059834 B CN112059834 B CN 112059834B CN 202010837491 A CN202010837491 A CN 202010837491A CN 112059834 B CN112059834 B CN 112059834B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/20—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a plane grinding device for a hard alloy female die with steps, which comprises a magnetic suction disc for placing the female die to be ground and a magnetic conductive stop iron for clamping the female die to be ground, wherein an elongated slot for placing the step surface is arranged on the magnetic suction disc, and the magnetic conductive stop iron is adsorbed on the magnetic suction disc. The invention provides a plane grinding device of a hard alloy female die with steps, which realizes simultaneous grinding of a plurality of parts, improves the processing efficiency and shortens the manufacturing period of the die; meanwhile, the step-shaped female die is guaranteed to be clamped, and the safety is improved.
Description
Technical Field
The invention relates to the technical field of die grinding, in particular to a plane grinding device for a hard alloy female die with steps.
Background
In the processing of hard alloy female dies of square dies and magnetic shoe dies in the magnetic industry, the traditional female die is step-free, the female die is in interference fit with a female die sleeve, the interference magnitude is large, and subsequent processing is carried out after hot matching. Before the female die is in hot fit with the female die sleeve, the periphery of the female die is required to be processed in place through plane grinding according to design requirements, and the verticality is guaranteed. At present, in the design of a die, a former non-step female die is changed into a short-step female die, but when the step female die is machined by plane grinding, flat tongs are required for clamping and machining. Because the blank is rough, each surface is uneven, the female die is easy to tilt up when a plurality of parts are ground, and the female die is overturned to cause danger. In order to ensure the perpendicularity between the periphery of the female die and the bottom surface, approximately half of the time is needed for correction, and generally, only one piece is used for carrying out plane grinding processing, so that the working efficiency is low, and the main problem lies in the clamping and placing of the die.
Most of the surface grinding devices on the market at present grind a step-free mold, for example, the publication No. CN205552160U of "neodymium iron boron magnetic material non-magnetic surface grinding tool" disclosed in the chinese patent document includes a surface grinding machine platform, a baffle, and a clamping block, wherein the baffle is fixedly arranged on three edges of the surface grinding machine platform, so that the neodymium iron boron magnetic product is blocked on the surface grinding machine platform; the baffle comprises a threaded baffle, a baffle A and a baffle B, and a plurality of screw rods are uniformly arranged on the threaded baffle and play a main role in later fixing; the clamp splice is arranged on the flat grinder platform, the clamp splice is arranged between the threaded baffle and the neodymium iron boron magnetic product, the parallel fixing effect is achieved, the clamp splice is fastened through a screw rod of the threaded baffle, and the device is not suitable for a stepped female die.
Disclosure of Invention
The invention provides a plane grinding device of a stepped hard alloy female die, aiming at overcoming the problems of inconvenience in processing, low efficiency and the like when the stepped female die is ground in the prior art, and realizing simultaneous grinding of a plurality of parts, improving the processing efficiency and shortening the manufacturing period of the die; meanwhile, the step-shaped female die is guaranteed to be clamped, and the safety is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a there is plane grinding device of step carbide die, is including being used for placing the magnetic chuck of treating the grinding die, being used for pressing from both sides the magnetic conduction buting iron that treats the grinding die be provided with the elongated slot that is used for placing the step face on the magnetic chuck, the magnetic conduction buting iron adsorbs on the magnetic chuck.
In the technical scheme, the long groove is provided with a step surface which is beneficial to placing a female die, so that the female die is flatly placed on a magnetic chuck, and the magnetic-conducting stop iron is used for extruding and clamping the female die, thereby preventing safety accidents caused by loosening of the female die during grinding; in addition, when the female die is magnetic, the magnetic suction disc attracts the female die, so that the placement firmness and stability of the female die are improved, and the grinding safety is improved; and the magnetic-conducting stop iron has magnetic conductivity, so that the magnetic-conducting stop iron is ensured to tightly attract the magnetic suction disc. In addition, the device can be used for grinding a plurality of female dies in parallel, so that the grinding efficiency is improved.
Preferably, a squeezing plate is arranged in the long groove, and a squeezing and pushing structure is arranged between the squeezing plate and the magnetic suction disc.
The extrusion plate is used for extruding the step surface of the female die, so that the difference between the step surface width and the long groove width is avoided, and the influence on the grinding quality caused by the movement of the female die on the surface of the magnetic suction disc during grinding is avoided.
Preferably, the extrusion propulsion structure includes the extrusion post, is used for controlling the toper extruded piece that the extrusion post removed and drives the rotatory column spinner of toper extruded piece be provided with the helicla flute on the toper extruded piece, extrusion post one end is fixed on the stripper plate, and the other end slides and sets up in the helicla flute, column spinner and the coaxial setting of toper extruded piece, be provided with helicitic texture between column spinner and the magnetism dish, helicitic texture and helicla flute cooperation.
The extrusion post is connected with the stripper plate, and the extrusion post drives the stripper plate and rotates, and the column spinner drives the toper extruded article rotatory, at the rotatory in-process of toper extruded article, because the extrusion post radially can't rotate, only takes place to remove in the axial, along with the rotation of column spinner, the extrusion post removes along the helicla flute, because the toper extruded article is the toper structure, along with the toper extruded article impels forward, the extrusion post promotes the stripper plate, and then presss from both sides tightly the step face of die.
Preferably, the end part of the extrusion column close to the spiral groove is provided with a limiting bulge, and the spiral groove is correspondingly provided with a limiting groove.
The arrangement of the limiting bulge and the limiting groove avoids inconvenience caused by the extrusion column deviating from the spiral groove.
Preferably, the conical pressing members are provided at the ends of the rotary column, one of the conical pressing members being provided; or the conical extrusion parts are provided with a plurality of connecting columns, and the positions of the conical extrusion parts are correspondingly arranged with the extrusion columns.
When one conical extrusion piece is arranged, a plurality of rotary columns need to be rotated, so that the extrusion plate is ensured to be attached to the step surface of the female die, and the firmness is high; when the conical extrusion piece is set to be a plurality of, only one rotating shaft needs to be rotated, the extrusion plate can be pushed, and the device is convenient, fast and efficient.
Preferably, a limiting thread plate is arranged on the magnetic suction disc and matched with the rotary column, and a first mounting groove for mounting the extrusion propulsion structure and a second mounting groove for mounting the limiting thread plate are arranged on the magnetic suction plate.
The arrangement of the limiting thread plate is matched with the rotary column to form a thread structure, so that the rotary column is driven to move, and the rotary column is ensured to be fixed under the state of no force application; in addition, when the installation, at first install toper extruded article and rotary rod in first mounting groove, install spacing screw plate in the second mounting groove again, the installation of being convenient for, spacing screw plate plays limiting displacement simultaneously, prevents effectively that toper extruded article and rotary rod from deviating from first mounting groove.
Preferably, a threaded hole is formed in the limiting threaded plate, and the threaded structure comprises an external thread arranged on the rotary column and an internal thread arranged in the threaded hole.
Internal thread and external screw thread be provided with and do benefit to the column spinner and the toper extruded article and remove in first mounting groove, and the column spinner is fixed motionless under the non-application of force state is guaranteed in the setting of helicitic texture simultaneously, improves overall structure's reliability.
Preferably, the pressing plate is provided with a chamfered structure.
Because the female die blank with the steps is not vertical to the steps, the arrangement of the chamfering structure is favorable for stably placing the female die, and safety accidents during grinding are avoided.
Preferably, the magnetic-conducting iron block is provided with a guide protrusion, the magnetic chuck is provided with a guide groove corresponding to the guide protrusion, and the guide groove is communicated with the elongated groove.
The guide groove and the guide protrusion play a role in guiding, the position of the magnetic conducting stop iron is prevented from changing in the clamping process, meanwhile, the installation position of the magnetic conducting stop iron is convenient to determine, and the efficiency is improved.
Preferably, the magnetic chuck is provided with the lateral wall in both sides, sets up between lateral wall and magnetic conduction stop iron and adjusts fixed knot and construct, adjust fixed knot and construct including setting up first regulation hole on the magnetic conduction stop iron, setting up the second regulation hole on the lateral wall and set up the regulating part in first regulation hole and second regulation hole.
The regulating part is set to be a stud structure, the first regulating hole and the second regulating hole are respectively set to be a threaded hole structure, the position of the magnetic conducting stop iron is adjusted to be beneficial to adjusting by adjusting the fixing structure, and meanwhile, the firmness of the concave die is prevented from being influenced by the fact that the magnetic conducting stop iron is moved.
Therefore, the invention has the following beneficial effects:
(1) a plurality of workpieces are ground simultaneously, the processing efficiency is improved, and the manufacturing period of the die is shortened;
(2) the step-shaped female die is ensured to be clamped, and the safety is improved;
(3) the arrangement of the extrusion plate and the extrusion propulsion structure avoids the influence on grinding quality caused by the movement of the female die on the surface of the magnetic chuck during grinding;
(4) the arrangement of the thread structure is beneficial to improving the reliability of the whole structure;
(5) the adjusting fixing structure is arranged to be beneficial to adjusting the position of the magnetic-conducting stop iron, and meanwhile, the magnetic-conducting stop iron is prevented from moving to influence the firmness of the female die.
Drawings
FIG. 1 is a schematic structural view of a flat grinding device with a stepped cemented carbide female die according to the present invention;
FIG. 2 is a schematic view of an application structure of a plane grinding device with a stepped hard alloy female die;
FIG. 3 is a schematic view of a structure for placing a plurality of stepped female dies during grinding;
FIG. 4 is a schematic view of a magnetic chuck;
FIG. 5 is a schematic view of the structure of an extrusion column;
FIG. 6 is a schematic view of a magnetically conductive stop;
in the figure: 1. the magnetic suction disc comprises a magnetic suction disc 101, a side wall 102, a guide groove 2, an elongated slot 3, a magnetic-conductive stop iron 301, a guide protrusion 4, an extrusion plate 5, an adjusting piece 6, a female die 7, an extrusion column 701, a limiting protrusion 8, a connecting column 9, a conical extrusion piece 10, a rotating column 11 and a limiting threaded plate.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
Example 1:
in embodiment 1 shown in fig. 1 and 3, the plane grinding device for the stepped hard alloy female die comprises a magnetic chuck 1 and a magnetic-conducting stop iron 3, wherein the magnetic chuck 1 is used for placing the female die to be ground, the magnetic-conducting stop iron 3 is used for clamping the female die to be ground, an elongated slot 2 is arranged on the magnetic chuck 1, the elongated slot 2 is used for placing a stepped surface, and the magnetic-conducting stop iron 3 has magnetic conductivity and is adsorbed on the magnetic chuck 1.
In the technical scheme, the device can be used for grinding a plurality of female dies in parallel, so that a plurality of female dies can be simultaneously ground, the grinding efficiency is improved, the long groove 2 is provided to facilitate the placement of the step surface of the female die 6, the female die 6 is flatly placed on the magnetic chuck 1, and the magnetic-conductive stop iron 3 is used for extruding and clamping the female die, so that safety accidents caused by the loosening of the female die during grinding are prevented; in addition, when the female die is magnetic, the magnetic suction disc 1 attracts the female die, so that the placement firmness and stability of the female die are improved, and the safety during grinding is improved; when the female die is not magnetic, the magnetic-conducting stop iron has magnetic conductivity, so that the magnetic sucking disc 1 is tightly sucked by the magnetic-conducting stop iron 3, the female dies are conveniently clamped, and the safety is improved.
Further, because there is the step die blank piece can not be perpendicular in step department, the die will be unstable on arranging flat grinder magnetic chuck in, produces the incident easily during the grinding, carries out the chamfer at the notch of magnetic chuck elongated slot, and the chamfer is the C1 chamfer, makes the die steadily place on magnetic chuck, improves the security.
Example 2:
as shown in fig. 4, the embodiment 2 is basically the same as the embodiment 1, except that: be provided with stripper plate 4 in elongated slot 2, be provided with extrusion propulsion structure between stripper plate 4 and magnetic chuck 1, stripper plate 4 is used for the step face of extrusion die, avoids step face width and elongated slot 2 width to have the difference, and then takes place to remove when avoiding the die to grind on magnetic chuck 1 surface and influence grinding quality. The extrusion propulsion structure comprises an extrusion column 7, a conical extrusion piece 9 for controlling the movement of the extrusion column 7 and a rotary column 10 for driving the conical extrusion piece 9 to rotate, a spiral groove is formed in the conical extrusion piece 9, one end of the extrusion column 7 is fixed on an extrusion plate 4, the other end of the extrusion column is arranged in the spiral groove in a sliding manner, the rotary column 10 and the conical extrusion piece 9 are coaxially arranged, a thread structure is arranged between the rotary column 10 and a magnetic chuck 1, the thread structure is matched with the spiral groove, the extrusion column 7 is connected with the extrusion plate 4, the extrusion column 7 drives the extrusion plate 4 to rotate, the rotary column 10 drives the conical extrusion piece 9 to rotate, in the rotating process of the conical extrusion piece 9, as the extrusion column 7 cannot rotate in the radial direction, only moves in the axial direction, along with the rotation of the rotary column 10, the extrusion column 7 moves along the conical extrusion piece 9, as the conical extrusion piece 9 is in a conical structure, the conical extrusion piece 9 forwards propels, the extrusion column 7 pushes the extrusion plate 4, and then the step surface of the female die is clamped.
In addition, a limiting thread plate 11 is arranged on the magnetic chuck 1, the limiting thread plate 11 is matched with the rotary column 10, a first mounting groove for mounting an extrusion propulsion structure and a second mounting groove for mounting the limiting thread plate 11 are formed in the magnetic chuck, a threaded hole is formed in the limiting thread plate 11, the threaded structure comprises an external thread arranged on the rotary column 10 and an internal thread arranged in the threaded hole, the limiting thread plate 11 is matched with the rotary column 10 to form a threaded structure, the internal thread and the external thread are arranged to facilitate the rotary column 10 and the conical extrusion piece 9 to move in the first mounting groove, and meanwhile, the threaded structure ensures that the rotary column 10 is fixed in an unapplied state, so that the reliability of the whole structure is improved; in addition, when the installation, at first install toper extruded article 9 and rotary rod in first mounting groove, install spacing threading board 11 again in the second mounting groove, the installation of being convenient for, spacing threading board 11 plays limiting displacement simultaneously, prevents effectively that toper extruded article 9 and rotary rod from deviating from first mounting groove.
In addition, the chamfer structure is arranged on the extrusion plate 4, and the step female die blank is not vertical to the step, so that the chamfer structure is favorable for stably placing the female die, and safety accidents during grinding are avoided.
Example 3:
as shown in fig. 5, the embodiment 3 is basically the same as the embodiment 1, except that: the end part of the extrusion column 7 close to the spiral groove is provided with a limiting protrusion 701, the spiral groove is correspondingly provided with a limiting groove, and the arrangement of the limiting protrusion 701 and the limiting groove avoids inconvenience caused by the extrusion column 7 deviating from the spiral groove.
Example 4:
the embodiment 4 is basically the same as the embodiment 1, except that: the conical extrusion parts 9 are arranged at the end parts of the rotary columns 10, one conical extrusion part 9 is arranged, when one conical extrusion part 9 is arranged, a plurality of rotary columns 10 need to be rotated, the extrusion plate 4 is ensured to be attached to the step surface of the female die, and meanwhile, the firmness is high;
example 5:
the embodiment 5 is basically the same as the embodiment 3, except that: toper extruded article 9 sets up a plurality of, is provided with spliced pole 8 between the toper extruded article 9, and toper extruded article 9 position corresponds the setting with extrusion post 7, when toper extruded article 9 sets up to a plurality of, only needs to rotate a rotation axis, both can promote stripper plate 4, and convenient and fast is efficient.
Example 6:
the embodiment 6 is basically the same as the embodiment 3, except that: the magnetic-conducting stop iron 3 is provided with a guide protrusion 301, the magnetic chuck 1 is provided with a guide groove 102 corresponding to the guide protrusion 301, and the guide groove 102 is communicated with the long groove 2. The guide groove 102 and the guide protrusion 301 play a role in guiding, so that the position of the magnetic-conducting stop iron 3 is prevented from changing in the clamping process, meanwhile, the installation position of the magnetic-conducting stop iron 3 is convenient to determine, and the efficiency is improved.
Further, 1 both sides of magnetism sucking disc are provided with lateral wall 101, set up between lateral wall 101 and magnetic conduction buting iron 3 and adjust fixed knot and construct, adjust fixed knot and construct including setting up first regulation hole on magnetic conduction buting iron 3, setting up the second regulation hole on lateral wall 101 and set up regulating part 5 in first regulation hole and second regulation hole. The adjusting part 5 is of a stud structure, the first adjusting hole and the second adjusting hole are respectively of a threaded hole structure, the position of the magnetic-conducting stop iron 3 can be adjusted conveniently by adjusting the fixing structure, and meanwhile the firmness of the concave die is prevented from being influenced by the fact that the magnetic-conducting stop iron 3 is moved.
In addition, the height of the magnetic-conducting stop iron is lower than the width of the blank female die, the length size of the magnetic-conducting stop iron is larger than the height of the two female dies, and the magnetic-conducting stop iron is made of No. 45 steel for reducing cost.
Example 7:
as shown in fig. 2, example 7 is an application example of a flat grinding apparatus having a stepped cemented carbide female die: when the grinding tool is used, one step surface of the female die faces upwards, the other step surface faces downwards and is placed in the groove, the female dies can be placed in double rows, one step surface of the female die in the second row faces downwards and is placed in the groove and is close to the front and the back of the female die in the first row, the quantity of the female die is the same as that of the female die in the first row, 8-20 female dies can be conveniently ground simultaneously, the coarse grinding efficiency and the semi-fine grinding efficiency are improved by 3-10 times, and after the grinding of the first step surface is completed, the female die is turned over for 180 degrees to grind the other step surface. Before grinding, two adjacent female dies are abutted against each other by proper knocking so as to avoid gaps. In addition, the length of the long groove is 400mm, so that a proper amount of female dies can be conveniently placed. The female die is made of hard alloy materials, if too many blank hard alloy female dies are placed together, the female dies are scraped by grinding due to large stress of rough grinding processing and easy to bow, the female dies are scraped by grinding if the rough grinding processing is light, and the female dies are scraped by grinding if the rough grinding processing is heavy, and the grinding wheel can also crack to generate mechanical equipment and personal safety accidents. .
It should be noted that as used in the foregoing description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The above examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention. Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (8)
1. The plane grinding device for the hard alloy female die with the steps is characterized by comprising a magnetic suction disc (1) for placing the female die to be ground and a magnetic-conductive stop iron (3) for clamping the female die to be ground, wherein an elongated slot (2) for placing the step surface is formed in the magnetic suction disc (1), and the magnetic-conductive stop iron (3) is adsorbed on the magnetic suction disc (1); an extrusion plate (4) is arranged in the long groove (2), and an extrusion propulsion structure is arranged between the extrusion plate (4) and the magnetic suction disc (1); extrusion propulsion structure includes extrusion post (7), is used for controlling toper extruded article (9) that extrusion post (7) removed and drives rotatory column spinner (10) of toper extruded article (9) be provided with the helicla flute on toper extruded article (9), extrusion post (7) one end is fixed on stripper plate (4), and the other end slides and sets up in the helicla flute, column spinner (10) and toper extruded article (9) coaxial setting, be provided with helicla configuration between column spinner (10) and magnetic chuck (1).
2. A plane grinding device of a stepped hard alloy female die according to claim 1, characterized in that the end part of the extrusion column (7) close to the spiral groove is provided with a limit bulge (701), and a limit groove is correspondingly arranged on the spiral groove.
3. A flat grinding apparatus for a stepped cemented carbide female die according to claim 1, wherein said tapered pressing members (9) are provided at the end of the rotary cylinder (10), one of said tapered pressing members (9); or the conical extrusion parts (9) are provided with a plurality of connecting columns (8) between the conical extrusion parts (9), and the positions of the conical extrusion parts (9) are correspondingly arranged with the extrusion columns (7).
4. A flat grinder with step carbide die as claimed in claim 1, wherein a limit screw plate (11) is installed on said magnetic chuck (1), the limit screw plate (11) is engaged with the rotary column (10), said magnetic chuck is provided with a first installation groove for installing the extrusion pushing structure and a second installation groove for installing the limit screw plate (11).
5. A flat grinding device of a stepped cemented carbide female die according to claim 4, wherein the limit thread plate (11) is provided with a threaded hole, and the thread structure comprises an external thread provided on the rotary column (10) and an internal thread provided in the threaded hole.
6. A flat grinding device with a stepped cemented carbide female die according to any one of claims 1 to 5, characterized in that a chamfer structure is provided on the pressing plate (4).
7. A flat grinder with a stepped hard metal female die according to any one of claims 1 to 5, wherein the magnetic conductive iron block (3) is provided with a guide protrusion (301), the magnetic chuck (1) is provided with a guide groove (102) corresponding to the guide protrusion, and the guide groove (102) is communicated with the elongated slot (2).
8. A flat grinder with step carbide die as claimed in any one of claims 1 to 5, wherein said magnetic chuck (1) is provided with side walls (101) on both sides, and an adjusting fixing structure is provided between the side walls (101) and the magnetic conductive iron (3), said adjusting fixing structure comprising a first adjusting hole provided on the magnetic conductive iron (3), a second adjusting hole provided on the side walls (101) and an adjusting piece (5) provided in the first adjusting hole and the second adjusting hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837491.0A CN112059834B (en) | 2020-08-19 | 2020-08-19 | Plane grinding device of hard alloy female die with steps |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837491.0A CN112059834B (en) | 2020-08-19 | 2020-08-19 | Plane grinding device of hard alloy female die with steps |
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| CN112059834A CN112059834A (en) | 2020-12-11 |
| CN112059834B true CN112059834B (en) | 2022-03-25 |
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| KR101738747B1 (en) * | 2015-03-27 | 2017-05-22 | 박찬문 | Position adjustable for easy clamping jig |
| CN108161629A (en) * | 2017-12-26 | 2018-06-15 | 佛山智达思佳机电科技有限公司 | A kind of automatic-lifting type auto parts and components flange sleeve inner ring workpiece polishing mechanism |
| CN108687660A (en) * | 2018-04-04 | 2018-10-23 | 江苏大学 | A kind of one-way clutch cavity flat stone mill tooling |
| CN111266966A (en) * | 2018-12-03 | 2020-06-12 | 新沂经济开发区建设发展有限公司 | Grinding device for die manufacturing |
| CN210081464U (en) * | 2019-03-05 | 2020-02-18 | 东莞市欧莱溅射靶材有限公司 | Electromagnetic clamp for grinding nonmagnetic planar target |
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