CN107597934B - Stamping tool and stamping method - Google Patents
Stamping tool and stamping method Download PDFInfo
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- CN107597934B CN107597934B CN201710629089.1A CN201710629089A CN107597934B CN 107597934 B CN107597934 B CN 107597934B CN 201710629089 A CN201710629089 A CN 201710629089A CN 107597934 B CN107597934 B CN 107597934B
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Abstract
The invention discloses a stamping tool and a stamping method, and belongs to the field of machining. The punching press frock includes: terrace die and die, the top of terrace die is equipped with the processing boss, the bottom of die is equipped with and processes boss matched with processing recess, the punching press frock still includes two at least fixed modules, two at least fixed modules use the axis of die to arrange along the outward flange symmetry of die as the axle, every fixed module all includes mounting and voussoir, the mounting includes fixture block and plug-in components, the plug-in components cartridge is on terrace die and die, the one end of plug-in components is outstanding in the bottom of terrace die, the one end and the fixture block fixed connection of plug-in components, the other end of plug-in components is outstanding in the top of die, and the other end of plug-in components is equipped with the spout, and the first inner wall of spout is arranged towards the die, the inclined plane of voussoir and the first inner wall sliding fit of spout, the. The invention ensures the dimensional accuracy of the stamping workpiece.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to a stamping tool and a stamping method.
Background
The punch forming is a common machining process and is mainly used for machining thin-walled parts. Common punching press frock mainly includes terrace die and die, and the terrace die is placed on the processing platform, and the die is installed on the punching machine, adds man-hour, will wait to process the work piece and place on the terrace die, then moves to the terrace die through punching machine drive die for wait to process the work piece by terrace die and die extrusion, in order to obtain fashioned punching press work piece.
However, for a workpiece to be processed made of a high-strength martensitic stainless steel material, due to high material toughness, the processed stamped workpiece is very easy to rebound under the action of self stress, so that the dimensional accuracy of the stamped workpiece cannot be guaranteed.
Disclosure of Invention
In order to solve the problem that the dimensional accuracy of a stamped workpiece cannot be guaranteed, the embodiment of the invention provides a stamping tool and a stamping method. The technical scheme is as follows:
in one aspect, an embodiment of the present invention provides a stamping tool, where the stamping tool includes: the stamping tool comprises a male die, a female die, a processing boss and at least two fixing modules, wherein the top of the male die is provided with the processing boss, the processing boss protrudes out of the top of the male die, the bottom of the female die is provided with a processing groove, the inner wall of the processing groove is opposite to and matched with the outer wall of the processing boss, the stamping tool further comprises at least two fixing modules, each fixing module is arranged along the outer edge of the female die at intervals, each fixing module comprises a fixing piece and a wedge block, each fixing piece comprises a clamping block and an inserting piece, the inserting pieces are inserted on the male die and the female die, one end of each inserting piece protrudes out of the bottom of the male die, one end of each inserting piece is fixedly connected with the clamping block, the clamping block abuts against the bottom of the male die, the other end of each inserting piece protrudes out of the top of the female die, the other end of, the inclined plane of the wedge block is in sliding fit with an inner wall of the sliding groove, and the wedge block is clamped between the sliding groove and the top of the female die.
In one implementation mode of the invention, a matching through hole is formed in the middle of the female die, a blank holder is arranged in the matching through hole, and the blank holder is fixedly installed at the top of the processing boss.
In another implementation manner of the invention, a chamfer is arranged on the outer edge of the top of the blank holder, and the outer peripheral wall of the blank holder is in clearance fit with the inner peripheral wall of the fit through hole.
In another implementation manner of the invention, a positioning groove is arranged at the bottom of the blank holder, a positioning protrusion is arranged at the top of the processing boss, and the positioning protrusion is inserted into the positioning groove.
In another implementation manner of the invention, the stamping tool further comprises a transition support, the bottom of the transition support and the top of the female die are mounted together, the bottom of the transition support is provided with a limiting block, and the limiting block and the blank holder are arranged oppositely.
In another implementation manner of the present invention, the stamping tool further includes a mounting bracket, the mounting bracket is mounted together with the top of the transition bracket, and the transition bracket is mounted on the stamping machine through the mounting bracket.
In another implementation manner of the present invention, the stamping tool is a stainless steel structural member.
On the other hand, an embodiment of the present invention provides a stamping method, where the stamping method is applicable to the stamping tool described above, and the stamping method includes:
mounting the stamping tool on a stamping machine;
placing a workpiece to be processed on the male die;
controlling the punching machine to enable the workpiece to be processed to be formed under the extrusion of the female die and the male die;
maintaining the relative position between the female die and the male die by the fixing module;
and carrying out stress relief operation on the workpiece to be processed clamped between the female die and the male die to obtain a formed stamping workpiece.
Further, install the punching press frock to the punching machine on, include:
placing the male die on a platform of the stamping machine;
fixing the female die on the female die;
mounting the female die and the transition support together;
the transition bracket is mounted on the punch by a mounting bracket.
Further, before placing the workpiece to be machined on the punch, the method comprises the following steps:
designing the workpiece to be processed into a circular structural member;
and polishing the outer edge of the workpiece to be machined and the inner edge of the workpiece to be machined into smooth transition.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
after a workpiece to be processed is extruded through a male die and a female die to obtain a stamping workpiece with a standard size, firstly, a plug-in is inserted into the male die and the female die, so that a clamping block is abutted against the bottom of the male die, one end, provided with a sliding groove, of the plug-in extends out of the top of the female die, then a wedge block is inserted into the sliding groove, the wedge block is clamped between the top of the sliding groove and the top of the female die, relative displacement between the male die and the female die is limited through the wedge block and the clamping block, and then the stamping workpiece can keep the standard size for a long time, so that the rebound of the stamping workpiece is avoided, and the size of.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a stamped workpiece provided by an embodiment of the invention;
fig. 2 is a cross-sectional view of a stamping tool provided in an embodiment of the present invention;
fig. 3 is a partial cross-sectional view of a stamping tool provided in an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a fixing member provided in an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a binder ring provided in accordance with an embodiment of the present invention;
FIG. 6 is a flow chart of a stamping method provided by an embodiment of the present invention;
the symbols in the drawings represent the following meanings:
1-male die, 11-processing boss, 111-positioning boss, 2-female die, 2 a-matching through hole, 21-processing groove, 3-fixing module, 31-fixing piece, 311-clamping block, 312-plug-in piece, 313-sliding groove, 313 a-first inner wall, 32-wedge block, 4-blank holder, 41-positioning groove, 5-transition support, 51-limiting block, 6-mounting support, A-punching machine and B-workbench.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The embodiment of the invention provides a stamping tool, which is used for stamping a thin-wall workpiece, wherein the thin-wall workpiece is a high-strength martensitic stainless steel structural member, and referring to fig. 1, the shape of the thin-wall workpiece can be regarded as the side wall of a circular truncated cone structure, namely the remaining part of the hollow circular truncated cone structure after the top wall and the bottom wall are removed.
Fig. 2 is a cross-sectional view of a stamping tool, see fig. 2, comprising: the device comprises a male die 1 and a female die 2, wherein a processing boss 11 is arranged at the top of the male die 1, a processing groove 21 matched with the processing boss 11 is arranged at the bottom of the female die 2, and the inner wall of the processing groove 21 is arranged opposite to the outer wall of the processing boss 11.
FIG. 3 is a partial cross-sectional view of a stamping tool, and referring to FIG. 3, the stamping tool further includes at least two fixing modules 3, each fixing module 3 is symmetrically arranged along the outer edge of the female die 2 with the central axis of the female die 2 as the axis, each fixing module 3 includes a fixing member 31 and a wedge 32, the fixing member 31 includes a fixture block 311 and an insert 312, the insert 312 is inserted into the male die 1 and the female die 2, one end of the insert 312 protrudes out of the bottom of the male die 1, one end of the insert 312 is fixedly connected with the fixture block 311, the other end of the insert 312 protrudes out of the top of the female die 2, and the other end of the insert 312 is provided with a sliding groove 313 (see fig. 4), a first inner wall 313a of the sliding groove 313 is arranged towards the female die 2, the inclined surface of the wedge 32 is in sliding fit with the first inner wall 313a of the sliding groove 313, and the wedge 32 is clamped between the sliding groove 313 and the top of the female die 2, so that the clamping block 311 is abutted against the bottom of the male die 1.
After a workpiece to be machined is extruded through the male die 1 and the female die 2 to obtain a punching workpiece with a standard size, the plug-in piece 312 is firstly inserted into the male die 1 and the female die 2, so that the clamping block 311 is abutted against the bottom of the male die 1, one end, provided with the sliding groove 313, of the plug-in piece 312 extends out of the top of the female die 2, then the wedge block 32 is inserted into the sliding groove 313, the wedge block 32 is clamped between the sliding groove 313 and the top of the female die 2, relative displacement between the male die 1 and the female die 2 is limited through the wedge block 32 and the clamping block 311, and the punching workpiece can be kept with the standard size for a long time, so that rebound of the punching workpiece is avoided, and the size of the.
Preferably, the stamping tool can be a stainless steel structural member, and the linear expansion coefficient of the stamping tool is ensured to be the same as that of the workpiece to be processed, so that the influence on the size precision of the stamping workpiece caused by the inconsistent linear expansion coefficients on the stamping tool is avoided.
With continued reference to fig. 3, in this embodiment, the middle portion of the female die 2 is provided with a matching through hole 2a, the top portion of the processing boss 11 is provided with a blank holder 4, the blank holder 4 is coaxially arranged with the processing boss 11, and the outer peripheral wall of the blank holder 4 is in clearance fit with the inner peripheral wall of the matching through hole 2 a.
In the above implementation manner, the workpiece to be processed is sleeved on the blank holder 4, and the inner edge of the workpiece to be processed is in contact with the outer edge of the blank holder 4, so that the function of positioning the inner edge of the workpiece to be processed is achieved. In addition, when the female die 2 moves towards the male die 1 to extrude a workpiece to be processed, the blank holder 4 must be inserted into the matching through hole 2a of the female die 2, so that the matching between the blank holder 4 and the matching through hole 2a can play a role in aligning and aligning the male die 1 and the female die 2.
Specifically, the outer edge of one end face of the blank holder 4, which faces away from the processing boss 11, is provided with a chamfer so as to facilitate the insertion alignment between the blank holder 4 and the matching through hole 2 a.
Specifically, a positioning groove 41 (see fig. 5) is arranged on one end face of the blank holder 4 facing the processing boss 11, a positioning protrusion 111 is arranged at the top of the processing boss 11, and the positioning protrusion 111 is inserted into the positioning groove 41.
In the above implementation, since the function of the blank holder 4 is to realize alignment between the male die 1 and the female die 2 by cooperation with the fitting through hole 2a, it is necessary to ensure a correct relative positional relationship between the blank holder 4 and the male die 1. Therefore, when assembling the blank holder 4, the relative position between the blank holder 4 and the punch 1 is first determined by the fit between the positioning groove 41 and the positioning projection 111, and then the blank holder 4 is fixed to the punch 1 by the bolt.
It should be noted that, in the present embodiment, the correct relative positional relationship between the holder 4 and the punch 1 may be such that the holder 4 and the punch 1 are arranged coaxially with respect to each other.
Referring to fig. 2 again, specifically, the stamping tool further includes a transition support 5, the bottom of the transition support 5 is mounted together with the top of the female die 2, the bottom of the transition support 5 is provided with a limit block 51 (see fig. 3), and the limit block 51 is arranged opposite to the blank holder 4.
In the above implementation manner, in the process that the transition support 5 drives the female die 2 to press down, the female die 2 firstly contacts with the workpiece to be processed and extrudes the workpiece to be processed, and the limiting block 51 abuts against the top of the blank holder 4 along with the continuous pressing of the transition support 5 and the female die 2, so that the excessive extrusion of the workpiece to be processed by the female die 2 is avoided.
Specifically, the bottom of the transition support 5 and the top of the female die 2 are fixedly installed together through bolts.
Specifically, the punching tool further comprises a mounting bracket 6, the mounting bracket 6 is mounted together with the top of the transition bracket 5, and the transition bracket 5 is mounted on the punching machine through the mounting bracket 6.
Fig. 6 is a flowchart of a stamping method, and in conjunction with fig. 6, the present embodiment provides a stamping method, where the stamping method is applied to the stamping tool, and the stamping method includes:
step 101: the female die 2 is mounted on the punch a, and the male die 1 is mounted on the table B (see fig. 2).
Specifically, step 101 may be implemented by:
first, the male die 1 is placed on the table of the press.
Then, fixing the female die 2 on the male die 1;
then, the female die 2 and the transition support 5 are installed together;
finally, the transition support 5 is mounted on the punch a by means of the mounting support 6.
Thus, the female die 2 and the male die 1 are firstly fixed together, so that the relative position relation between the female die 2 and the male die 1 is not changed in the process of assembling the female die 2 and the transition support 5, and the male die 1 and the female die 2 can be accurately aligned and assembled equivalently.
Step 102: when the workpiece to be machined is the circular ring structural member shown in fig. 1, the outer edge of the workpiece to be machined and the inner edge of the workpiece to be machined are polished to be in smooth transition.
Therefore, the workpiece to be processed is prevented from cracking due to stress concentration in the stamping process.
Step 103: the die 2 is detached from the punch 1, and the die 2 is raised by the punch a.
Thus, the subsequent operation of installing the workpiece to be machined can be facilitated.
Step 104: a workpiece to be machined is placed on the punch 1.
Step 105: by controlling the punch A, the workpiece to be processed is formed under the extrusion of the female die 2 and the male die 1.
Step 106: the relative position between the female die 2 and the male die 1 is maintained by the fixing module 3.
Specifically, step 106 may be implemented by:
first, the insert 312 is sequentially passed through the punch 1 and the die 2 such that the insert 312 protrudes from the top of the die 2.
Then, the wedge 32 is interposed between the slide groove 313 and the top of the die 2, the inclined surface of the wedge 32 abuts against the first inner wall 313a of the slide groove 313, and the bottom surface of the wedge 32 abuts against the top of the die 2, so that the wedge 32 and the block clamp the die 2 and the punch 1.
Step 107: the work piece to be processed, which is clamped between the female die 2 and the male die 1, is subjected to a stress relieving operation to obtain a formed punched work piece.
In step 107, the stress relieving operation may be performed by performing an overall annealing heat treatment, so as to ensure the maximum stress relief, so that the final and live stamped workpiece can obtain a stable forming size, and the stamped workpiece is prevented from springing back.
After a workpiece to be machined is extruded through the male die 1 and the female die 2 to obtain a punching workpiece with a standard size, the plug-in piece 312 is firstly inserted into the male die 1 and the female die 2, so that the clamping block 311 is abutted against the bottom of the male die 1, one end, provided with the sliding groove 313, of the plug-in piece 312 extends out of the top of the female die 2, then the wedge block 32 is inserted into the sliding groove 313, the wedge block 32 is clamped between the sliding groove 313 and the top of the female die 2, relative displacement between the male die 1 and the female die 2 is limited through the wedge block 32 and the clamping block 311, and the punching workpiece can be kept with the standard size for a long time, so that rebound of the punching workpiece is avoided, and the size of the.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a punching press frock, punching press frock includes: the male die and the female die are characterized in that a processing boss is arranged at the top of the male die, a processing groove matched with the processing boss is arranged at the bottom of the female die,
the stamping tool further comprises at least two fixing modules, the at least two fixing modules are symmetrically arranged along the outer edge of the female die by taking the central axis of the female die as an axis, each fixing module comprises a fixing piece and a wedge block, each fixing piece comprises a clamping block and an inserting piece, the inserting pieces are inserted into the male die and the female die, one end of each inserting piece protrudes out of the bottom of the male die, one end of each inserting piece is fixedly connected with the corresponding clamping block, the other end of each inserting piece protrudes out of the top of the female die, a sliding groove is formed in the other end of each inserting piece, a first inner wall of each sliding groove faces the female die, the inclined surface of each wedge block is in sliding fit with the first inner wall of each sliding groove, and the wedge block is clamped between the corresponding sliding groove and the top of the female die so that the corresponding clamping block;
the middle part of the female die is provided with a matching through hole, the top of the processing boss is provided with a blank holder, the blank holder and the processing boss are coaxially arranged, and the outer peripheral wall of the blank holder is in clearance fit with the inner peripheral wall of the matching through hole;
a positioning groove is formed in one end face, facing the processing boss, of the blank holder, a positioning protrusion is arranged at the top of the processing boss, and the positioning protrusion is inserted into the positioning groove;
and a chamfer is arranged on the outer edge of one end face of the blank holder, which faces away from the processing boss.
2. The punching tool according to claim 1, further comprising a transition support, wherein the bottom of the transition support is mounted with the top of the female die, and a limiting block is arranged at the bottom of the transition support and is arranged opposite to the blank holder.
3. The stamping tool of claim 2, further comprising a mounting bracket mounted with a top of the transition bracket, the transition bracket being mounted on a stamping machine via the mounting bracket.
4. The stamping tool according to any one of claims 1 to 3, wherein the stamping tool is a stainless steel structural member.
5. A stamping method, which is applied to the stamping tool of claim 1, and comprises the following steps:
mounting the female die on a punching machine, and mounting the male die on a workbench;
placing a workpiece to be processed on a processing boss of the male die;
controlling the punching machine to enable the workpiece to be processed to be formed under the extrusion of the processing groove of the female die and the processing boss of the male die;
maintaining the relative position between the female die and the male die by the fixing module;
and carrying out stress relief operation on the workpiece to be processed clamped between the female die and the male die to obtain a formed stamping workpiece.
6. The stamping method of claim 5, wherein maintaining the relative position between the female die and the male die by the stationary module comprises:
sequentially penetrating the insert through the male die and the female die, so that the insert protrudes out of the top of the female die;
and clamping the wedge block between the sliding groove and the top of the female die, wherein the inclined surface of the wedge block abuts against the first inner wall of the sliding groove, and the bottom surface of the wedge block abuts against the top of the female die, so that the wedge block and the clamping block clamp the female die and the male die.
7. The punching method according to claim 5, wherein before placing the workpiece to be machined on the machining boss of the punch, the punching method further comprises:
and when the workpiece to be machined is a circular ring structural member, polishing the outer edge of the workpiece to be machined and the inner edge of the workpiece to be machined into smooth transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710629089.1A CN107597934B (en) | 2017-07-28 | 2017-07-28 | Stamping tool and stamping method |
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| CN201710629089.1A CN107597934B (en) | 2017-07-28 | 2017-07-28 | Stamping tool and stamping method |
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| CN107597934A CN107597934A (en) | 2018-01-19 |
| CN107597934B true CN107597934B (en) | 2020-03-31 |
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| CN114918309B (en) * | 2022-07-20 | 2022-10-18 | 泰州市华驰不锈钢制品有限公司 | Stamping device of stainless steel spare |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5372027A (en) * | 1989-11-29 | 1994-12-13 | Armco Steel Company, L.P. | Controlled material flow hydroforming |
| CN102416419B (en) * | 2011-07-27 | 2014-04-23 | 中南大学 | Vibrating creep forming method for metal member |
| CN103272924B (en) * | 2013-04-16 | 2015-04-15 | 西安交通大学 | Cooling machining die capable of maintaining pressure and used for top-layer foil of elastic foil gas bearing |
| CN203360515U (en) * | 2013-06-24 | 2013-12-25 | 大连冶金轴承股份有限公司 | Cemented steel cylindrical hole bearing ring quenching assembling die |
| CN203635772U (en) * | 2013-12-30 | 2014-06-11 | 贵州遵义驰宇精密机电制造有限公司 | Flying wheel disc punch forming die |
| CN106694633A (en) * | 2016-11-28 | 2017-05-24 | 北京动力机械研究所 | High-temperature alloy precise molding cold pressing thermal stability process method |
| CN107685110A (en) * | 2017-09-06 | 2018-02-13 | 芜湖博康新材料技术有限公司 | A kind of top cover rapid forming mold location locking mechanism |
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