CN113118364A - Quick die changing device for forging forming die - Google Patents
Quick die changing device for forging forming die Download PDFInfo
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- CN113118364A CN113118364A CN202110433261.2A CN202110433261A CN113118364A CN 113118364 A CN113118364 A CN 113118364A CN 202110433261 A CN202110433261 A CN 202110433261A CN 113118364 A CN113118364 A CN 113118364A
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- sliding
- die holder
- die
- fixed
- slip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
- B21J13/03—Die mountings
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Abstract
The invention belongs to the field of forging processing, and particularly discloses a quick die changing device for a forging forming die, which comprises a fixed die holder and a sliding die holder, wherein one opposite surface of the sliding die holder and the fixed die holder is a working surface, the sliding direction of the sliding die holder is vertical to the working surface, a fixed die is installed on the working surface of the fixed die holder, a sliding die is installed on the working surface of the sliding die holder, the quick die changing device further comprises two groups of positioning assemblies respectively installed on the sliding die holder and the fixed die holder, each positioning assembly comprises a positioning disc, a positioning groove for installing the fixed die or the sliding die is formed in the positioning disc, each positioning assembly further comprises a positioning piece, each positioning piece comprises a sliding block which is connected to the periphery of the positioning disc in a sliding mode, each sliding block comprises a sliding part and a connecting part, each connecting. By adopting the scheme of the invention, the problem that the mold needs to be debugged for a long time when being replaced can be solved.
Description
Technical Field
The invention belongs to the field of forging processing, and particularly relates to a quick die changing device for a forging forming die.
Background
The traditional forging forming die comprises a fixed die holder and a corresponding sliding die holder, wherein a specific fixed die and a specific sliding die are respectively detachably connected to the corresponding fixed die holder and the corresponding sliding die holder, in the prior art, the fixed die and the sliding die are respectively fixed on the fixed die holder and the sliding die holder through a plurality of bolts, when the fixed die and the sliding die are replaced and installed, a plurality of locking bolts at the periphery of the fixed die and the sliding die need to be loosened, then the fixed die or the sliding die is taken out, the replaced new fixed die or the replaced sliding die is put in, the plurality of locking bolts at the periphery are pre-tightened, then the pre-forging debugging needs to be executed, the installation errors of the fixed die and the sliding die are within a certain range, if the installation errors exceed the specified range, the fixed die and the sliding die need to be re-installed again, the debugging process takes time, the time is approximately 20-30 minutes, frequent inspection and debugging are required.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a quick die change device for a forging forming die, which aims to solve the problems of low die change efficiency and long time consumption.
In order to achieve the purpose, the invention adopts the following technical scheme:
the quick die changing device for the forging forming die comprises a fixed die holder and a sliding die holder, wherein one opposite surface of the sliding die holder and the fixed die holder is a working surface, the sliding direction of the sliding die holder is vertical to the working surface, a fixed die is arranged on the working surface of the fixed die holder, a sliding die is arranged on the working surface of the sliding die holder, and the quick die changing device also comprises two groups of dies which are respectively arranged on the sliding die holder, the locating component on the fixed die holder, the locating component is including dismantling the positioning disk of connection on fixed die holder or slip die holder, be equipped with the constant head tank that supplies fixed die or slip die to install on the positioning disk, the locating component is still including setting up the setting element that is used for spacing fixed die or slip die in positioning disk circumference, the setting element includes the slider, the slider includes sliding part and connecting portion, sliding part sliding connection is on fixed die holder or slip die holder, the slip direction of sliding part is along the radial of positioning disk, connecting portion are used for being connected with the positioning disk.
Compared with the prior art, the invention has the following beneficial effects:
in this scheme, fix a position the installation of fixed mould or sliding die through the setting of constant head tank, location time when having reduced traditional retooling, follow-up only need with fixed mould or sliding die fix in the constant head tank can. The fixed mould or the slip mould are supported through the slip of slider in this scheme, and then fix fixed mould or slip mould, and the slider is after sliding, only need connect on the positioning disk can, reduced the time of fixed debugging, simultaneously through the fixed of slider, reduced the dislocation removal that fixed mould or slip mould probably produced after using a period to a certain extent.
Furthermore, a plurality of guide pillars are fixed on the working surface of the fixed die holder, a plurality of guide sleeves matched with the guide pillars are fixed on the working surface of the sliding die holder, and the guide sleeves are used for being sleeved on the guide pillars.
Has the advantages that: when the sliding die holder slides, the guide sleeve is matched with the guide pillar to position the sliding of the sliding die holder so as to limit the sliding direction of the sliding die holder.
Further, still include drawing of patterns subassembly, drawing of patterns subassembly includes the through-hole of seting up on fixed die holder, the fixed mould intercommunication each other, and sliding connection has the ejector pin in the through-hole.
Has the advantages that: when the die is demolded, the sliding ejector rod is more convenient for ejecting the formed workpiece in the fixed die.
Furthermore, the upper end of the ejector rod is provided with an inverted round table-shaped limiting part, and the top of the through hole on the fixed die is provided with a limiting groove for inserting the limiting part.
Has the advantages that: the limiting groove is used for limiting the limiting part and limiting the maximum degree of the downward sliding of the top rod, so that the phenomenon that the bottom of the fixed die is gapped to influence the forming of workpieces is avoided.
Further, there are a plurality of draw-in grooves along the circumference equipartition on the positioning disk, and the draw-in groove internal fixation has first nut, has seted up the bar groove on the connecting portion, and the bar inslot has inserted the guide bar, guide bar lower extreme and first nut threaded connection, and guide bar upper portion cover is equipped with spacing dish, and the external diameter of spacing dish is greater than the width in bar groove, and guide bar upper end threaded connection has the second nut.
Has the advantages that: through the setting of spacing dish, better pressing the slider and carrying out fore-and-aft spacing to the slider.
Furthermore, only one of the two adjacent clamping grooves is internally fixed with a first nut, the mounting positions of the first nuts on the fixed die holder and the sliding die holder are staggered, and the sizes of the first nuts and the second nuts are consistent.
Has the advantages that: after the die is closed, the second nut on the fixed die holder is clamped in the clamping groove on the sliding die holder, and the second nut on the sliding die holder is clamped in the clamping groove of the fixed die holder, so that the mutual limiting effect is realized.
Furthermore, a plurality of wedge blocks respectively positioned between adjacent sliding blocks are fixed on the sliding die holder and the fixed die holder along the circumferential direction of the positioning disc, the wedge blocks are respectively in one-to-one correspondence with the clamping grooves without the first nuts, the wedge surfaces of the wedge blocks face the positioning grooves, and the wedge surfaces incline towards the direction far away from the working surface along the direction from the positioning grooves to the direction far away from the positioning grooves; the wedge block on the sliding die holder is connected with an inserted bar in a sliding way, and the sliding part of the sliding block on the sliding die holder is provided with an insertion hole for the inserted bar to insert.
Has the advantages that: during installation, the sliding block on the sliding die holder slides, so that the sliding block and the sliding die are abutted, the inserted rod slides, the inserted rod is inserted into the insertion hole, and the inserted rod limits the sliding of the sliding block to a certain degree because the wedge block is fixed, so that the sliding die can be fixed by the sliding block. When the die is closed, the sliding die holder slides downwards, the wedge surface of the wedge block on the sliding die holder is abutted against the slide block on the fixed die holder, the slide block on the fixed die holder is pushed to slide towards the direction close to the fixed die and finally abutted against the fixed die, and the wedge block limits the slide block to prevent the slide block from moving in the processing process. The wedge block on the fixed die holder further limits the slide block on the sliding die holder.
In this scheme, during the retooling, only need slide the slider on the slip die holder and slip the inserted bar can, further reduce staff's operation, and then further improvement retooling speed.
Furthermore, one side of the connecting part facing the positioning groove is provided with an arc-shaped groove used for clamping the fixed die or the sliding die.
Has the advantages that: the fixed die or the sliding die is better clamped through the arc-shaped groove, and the fixed die or the sliding die is better limited.
Drawings
Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention.
Fig. 2 is a front sectional view of fig. 1.
Fig. 3 is a front view of embodiment 2 of the present invention.
In the figure: 1. a sliding die holder; 2. a guide sleeve; 3. a guide post; 4. fixing a die holder; 5. positioning a plate; 6. a threaded hole; 7. a card slot; 8. a sliding part; 9. a connecting portion; 10. a slider; 11. a limiting disc; 12. a second nut; 13. a first nut; 14. a fixed mold; 15. sliding the mold; 16. a guide bar; 17. a top rod; 18. a limiting part; 19. a wedge block; 20. a wedge surface; 21. and (4) inserting the rod.
Detailed Description
The invention is further described in detail below with reference to the accompanying drawings, and specific embodiments are given.
Example 1
As shown in fig. 1 and 2, the quick die changing device for a forging forming die comprises an installation component, a positioning component and a demolding component, wherein the installation component comprises a fixed die holder 4 and a sliding die holder 1, one side of the sliding die holder 1 opposite to the fixed die holder 4 is a working surface, the sliding direction of the sliding die holder 1 is perpendicular to the working surface, the fixed die holder 4 is fixed on a machine tool below the sliding die holder, the direction of the sliding die holder 1 in sliding connection above the fixed die holder 4 is described as an example, namely, the upper surface of the fixed die holder 4 and the lower surface of the sliding die holder 1 are working surfaces, and in the actual installation process, the sliding die holder 1 can also be installed on the side of the fixed die holder. In the actual use process, the driving force required by the sliding die holder 1 during sliding can be manual operation or can be driven by conventional structures such as an air cylinder in the prior art.
The working surface of the fixed die holder 4 is fixed with a plurality of guide pillars 3, the working surface of the sliding die holder 1 is fixed with a plurality of guide sleeves 2 matched with the guide pillars 3, the guide sleeves 2 are sleeved on the guide pillars 3, and when the sliding die holder 1 slides, the sliding die holder 1 is positioned by matching of the guide sleeves 2 and the guide pillars 3 so as to limit the sliding direction of the sliding die holder 1. In practical use, the guide pillar 3 can be installed on the sliding die holder 1, and the guide sleeve 2 is installed on the fixed die holder 4, so long as the guide pillar 3 and the guide sleeve 2 are matched.
The locating component includes two sets ofly and installs respectively on the working face of fixed die holder 4 and slip die holder 1, describe for the example locating component on the fixed die holder 4 (locating component on the slide die holder is unanimous with the locating component structure on the fixed die holder 4, only the mounted position of slider 10 is different), locating component includes positioning disk 5, positioning disk 5 can be dismantled and connect on the working face of fixed die holder 4, and is concrete, there are a plurality of screw holes 6 along the circumference equipartition on the positioning disk 5, 6 threaded connection in screw hole has the countersunk bolt, fix positioning disk 5 on fixed die holder 4 through the countersunk bolt.
All be equipped with draw-in groove 7 on the positioning disk 5 between the adjacent screw hole 6, only one draw-in groove 7 internal fixation has first nut 13 among two adjacent draw-in grooves 7, and simultaneously, the first nut 13 mounted position on the fixed die holder 4 and the first nut 13 mounted position on the slip die holder 1 set up in the staggered way. The positioning assembly further comprises a positioning part used for limiting the fixed die 14 or the sliding die 15 in the circumferential direction of the positioning disk 5, the positioning part comprises a sliding block 10 connected to the fixed die holder 4 in a sliding mode, the sliding direction of the sliding block 10 is along the radial direction of the positioning disk 5, and the sliding block 10 is in one-to-one correspondence with the clamping grooves 7 provided with the first nuts 13. The slider 10 includes sliding part 8 and connecting portion 9, and 8 sliding connection of sliding part are on fixed die holder 4, and connecting portion 9 is fixed in 8 upper ends of sliding part, and connecting portion 9 is located 5 tops of positioning disk and connecting portion 9 lower surfaces and 5 upper surfaces of positioning disk paste mutually, and one side that connecting portion 9 faced the constant head tank is equipped with the arc wall that is used for blocking fixed mould 14.
Connecting portion 9 is used for being connected with positioning disk 5, and is concrete, the bar groove has been seted up to connecting portion 9 upper end, bar groove and draw-in groove 7 correspond, bar inslot has inserted guide bar 16, 16 lower extremes of guide bar and 13 threaded connection of first nut, 16 upper portion covers of guide bar are equipped with spacing dish 11, the external diameter of spacing dish 11 is greater than the width in bar groove, 16 upper end threaded connection of guide bar has second nut 12, second nut 12 revolves on guide post upper portion, compress tightly spacing dish 11, spacing dish 11 presses on connecting portion 9, it is spacing to carry out connecting portion 9. The first nut 13 and the second nut 12 are of identical size.
The fixed die 14 is installed on the positioning disk 5 of the fixed die holder 4, the sliding die 15 is installed on the positioning disk 5 of the sliding die holder 1, specifically, the positioning groove is formed in the middle of the positioning disk 5, and the fixed die 14 or the sliding die 15 is placed into the positioning groove and fixed through the positioning assembly.
The drawing of patterns subassembly is including offering at fixed die holder 4, the through-hole of intercommunication each other on the fixed mould 14, sliding connection has ejector pin 17 in the through-hole, ejector pin 17 upper end is equipped with the spacing portion 18 that is the round platform form of handstand, the through-hole top on the fixed mould 14 is equipped with the spacing groove that supplies spacing portion 18 male, spacing to spacing portion 18 through the spacing groove, carry on spacingly to the maximum that ejector pin 17 glided, when spacing portion 18 and spacing groove offset, ejector pin 17 upper surface forms the bottom of fixed mould 14.
When the fixing die is used specifically, the fixed die 14 is placed in the positioning groove of the fixed die holder 4, the sliding block 10 on the fixed die holder 4 slides to abut against the fixed die 14, and the sliding block 10 is fixed by screwing the second nut 12 on the fixed die holder 4, so that the fixed die 14 is fixed. The sliding die 15 is placed in the positioning groove of the sliding die holder 1, the sliding block 10 on the sliding die holder 1 abuts against the sliding die 15, and the sliding block 10 is fixed by screwing the second nut 12 on the sliding die holder 1, so that the sliding die 15 is fixed. When the fixed die 14 or the sliding die 15 needs to be replaced, the second nut 12 is loosened, so that the slide block 10 slides in the direction away from the positioning groove, and the fixed die 14 or the sliding die 15 can be taken down and replaced conveniently.
When a workpiece is processed, the sliding die 15 slides towards the fixed die 14 along with the sliding die holder 1, the sliding die 15 and the fixed die 14 are assembled to form a processing die, at the moment, the second nut 12 on the fixed die holder 4 is clamped in the clamping groove 7 on the sliding die holder 1, and the second nut 12 on the sliding die holder 1 is clamped in the clamping groove 7 on the fixed die holder 4, so that the mutual limiting effect is realized.
After a workpiece is machined and molded, the sliding die holder 1 drives the sliding die 15 to slide towards the direction far away from the fixed die 14, the machining die is opened, the molded workpiece in the fixed die 14 is ejected out through the sliding ejector rod 17, and demolding is completed.
Example 2
In this embodiment, on the basis of embodiment 1, referring to fig. 3, a plurality of wedges 19 respectively located between adjacent sliders 10 are fixed on the sliding die holder 1 and the fixed die holder 4 along the circumferential direction of the positioning disk 5, and the wedges 19 respectively correspond to the slots 7 without the first nuts 13. The wedge surface 20 of the wedge 19 faces the slot and the wedge surface 20 slopes away from the work surface in a direction from close to far from the slot. An insert rod 21 is slidably connected to the wedge 19 of the sliding die holder 1, an insertion hole into which the insert rod 21 is inserted is formed in the sliding portion 8 of the slider 10 of the sliding die holder 1, the sliding direction of the insert rod 21 is not limited, as long as the insert rod 21 can be inserted into the insertion hole to connect the wedge 19 and the slider 10, and therefore the sliding direction of the insert rod 21 cannot be along the radial direction of the positioning disk 5.
In particular, when in use, the second nut 12 does not need to be screwed to press the limiting disc 11, and the guide rod 16 only guides and limits the sliding direction of the slider 10. During installation, the sliding die 15 is placed in the positioning groove in the sliding die holder 1, the sliding block 10 on the sliding die holder 1 slides, the sliding block 10 and the sliding die 15 are abutted, the inserted rod 21 slides, the inserted rod 21 is inserted into the insertion hole, and the inserted rod 21 limits the sliding of the sliding block 10 to a certain extent due to the fact that the wedge block 19 is fixed, and the sliding die 15 can be fixed by the sliding block 10. When the die is closed, the sliding die holder 1 slides downwards, the wedge surface 20 of the wedge block 19 on the sliding die holder 1 abuts against the slide block 10 on the fixed die holder 4, the slide block 10 on the fixed die holder 4 is pushed to slide towards the direction close to the fixed die 14 and finally abuts against the fixed die 14, and the wedge block 19 limits the slide block 10 to prevent the slide block 10 from moving in the machining process. The wedge block 19 on the fixed die holder 4 also further limits the slide block 10 on the sliding die holder 1.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. Forge quick die change device of forming die, including fixed die holder and slip die holder, the one side that slip die holder and fixed die holder are relative is the working face, and the slip direction perpendicular to working face of slip die holder installs the fixed mould on the working face of fixed die holder, installs slip mould, its characterized in that on the working face of slip die holder: still include two sets of install respectively at the slip die holder, the locating component on the fixed die holder, locating component is including dismantling the positioning disk of connection on fixed die holder or slip die holder, be equipped with the constant head tank that supplies fixed mould or slip die installation on the positioning disk, locating component is still including setting up the setting element that is used for spacing fixed mould or slip mould in positioning disk circumference, the setting element includes the slider, the slider includes sliding part and connecting portion, sliding part sliding connection is on fixed die holder or slip die holder, the slip direction of sliding part is along the radial of positioning disk, connecting portion are used for being connected with the positioning disk.
2. The forging forming die rapid die changing device of claim 1, wherein: the working surface of the fixed die holder is fixed with a plurality of guide pillars, the working surface of the sliding die holder is fixed with a plurality of guide sleeves matched with the guide pillars, and the guide sleeves are used for being sleeved on the guide pillars.
3. The forging forming die rapid die changing device of claim 1, wherein: the demolding component comprises through holes which are formed in the fixed die holder and the fixed die and communicated with each other, and a push rod is connected in the through holes in a sliding mode.
4. The forging forming die rapid die changing device as recited in claim 3, wherein: the upper end of the ejector rod is provided with an inverted round table-shaped limiting part, and the top of the through hole in the fixed die is provided with a limiting groove for inserting the limiting part.
5. The forging forming die rapid die changing device of claim 1, wherein: there are a plurality of draw-in grooves along the circumference equipartition on the positioning disk, and the draw-in groove internal fixation has first nut, has seted up the bar groove on the connecting portion, and the bar inslot has inserted the guide bar, guide bar lower extreme and first nut threaded connection, and guide bar upper portion cover is equipped with spacing dish, and the external diameter of spacing dish is greater than the width in bar groove, and guide bar upper end threaded connection has the second nut.
6. The forging forming die rapid die changing device of claim 5, wherein: only one clamping groove is internally fixed with a first nut, the first nut mounting position on the fixed die holder and the first nut mounting position on the sliding die holder are arranged in a staggered mode, and the first nut and the second nut are consistent in size.
7. The forging forming die rapid die changing device of claim 1, wherein: a plurality of wedge blocks respectively positioned between adjacent sliding blocks are fixed on the sliding die holder and the fixed die holder along the circumferential direction of the positioning disc, the wedge blocks respectively correspond to the clamping grooves without the first nuts one by one, the wedge surfaces of the wedge blocks face the positioning grooves, and the wedge surfaces incline towards the direction far away from the working surface along the direction from the positioning grooves to the direction far away from the positioning grooves; the wedge block on the sliding die holder is connected with an inserted bar in a sliding way, and the sliding part of the sliding block on the sliding die holder is provided with an insertion hole for the inserted bar to insert.
8. The forging forming die rapid die changing device of claim 1, wherein: and an arc-shaped groove for clamping the fixed die or the sliding die is formed in one side of the connecting part facing the positioning groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110433261.2A CN113118364B (en) | 2021-04-22 | 2021-04-22 | Quick die changing device for forging forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110433261.2A CN113118364B (en) | 2021-04-22 | 2021-04-22 | Quick die changing device for forging forming die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113118364A true CN113118364A (en) | 2021-07-16 |
| CN113118364B CN113118364B (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110433261.2A Active CN113118364B (en) | 2021-04-22 | 2021-04-22 | Quick die changing device for forging forming die |
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| CN (1) | CN113118364B (en) |
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| CN103170568A (en) * | 2013-04-07 | 2013-06-26 | 浙江正昌锻造股份有限公司 | Forging die holder kit |
| CN203508753U (en) * | 2013-08-22 | 2014-04-02 | 中国第一汽车股份有限公司 | Male die quick-changing structure |
| CN204430119U (en) * | 2014-12-11 | 2015-07-01 | 重庆全悦祥精密锻造机械工业有限公司 | A kind of novel die for two gear driven tooth |
| CN109365709A (en) * | 2018-12-03 | 2019-02-22 | 刘婧 | A kind of crawler belt guide forging mold |
| CN109570313A (en) * | 2019-02-06 | 2019-04-05 | 桐乡市阑悦服饰有限公司 | A kind of automobile processing mold and its control method |
| CN210817244U (en) * | 2019-10-12 | 2020-06-23 | 无锡嘉亿锻造有限公司 | High-stability upper die and lower die mounting structure of forging die |
| CN211071651U (en) * | 2019-10-24 | 2020-07-24 | 济南鑫伟锻造有限公司 | Friction press |
| CN211072637U (en) * | 2019-12-09 | 2020-07-24 | 秦皇岛戴卡兴龙轮毂有限公司 | Machining center tool for clamping bottom die |
-
2021
- 2021-04-22 CN CN202110433261.2A patent/CN113118364B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170568A (en) * | 2013-04-07 | 2013-06-26 | 浙江正昌锻造股份有限公司 | Forging die holder kit |
| CN203508753U (en) * | 2013-08-22 | 2014-04-02 | 中国第一汽车股份有限公司 | Male die quick-changing structure |
| CN204430119U (en) * | 2014-12-11 | 2015-07-01 | 重庆全悦祥精密锻造机械工业有限公司 | A kind of novel die for two gear driven tooth |
| CN109365709A (en) * | 2018-12-03 | 2019-02-22 | 刘婧 | A kind of crawler belt guide forging mold |
| CN109570313A (en) * | 2019-02-06 | 2019-04-05 | 桐乡市阑悦服饰有限公司 | A kind of automobile processing mold and its control method |
| CN210817244U (en) * | 2019-10-12 | 2020-06-23 | 无锡嘉亿锻造有限公司 | High-stability upper die and lower die mounting structure of forging die |
| CN211071651U (en) * | 2019-10-24 | 2020-07-24 | 济南鑫伟锻造有限公司 | Friction press |
| CN211072637U (en) * | 2019-12-09 | 2020-07-24 | 秦皇岛戴卡兴龙轮毂有限公司 | Machining center tool for clamping bottom die |
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| CN113118364B (en) | 2023-05-23 |
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