CN212857208U - Expanding and shaping device for inner hole of MIM sintered blank - Google Patents
Expanding and shaping device for inner hole of MIM sintered blank Download PDFInfo
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- CN212857208U CN212857208U CN202021704420.5U CN202021704420U CN212857208U CN 212857208 U CN212857208 U CN 212857208U CN 202021704420 U CN202021704420 U CN 202021704420U CN 212857208 U CN212857208 U CN 212857208U
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- 238000007493 shaping process Methods 0.000 title claims abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 11
- 239000000047 product Substances 0.000 claims description 77
- 239000011265 semifinished product Substances 0.000 claims description 25
- 238000001125 extrusion Methods 0.000 abstract description 16
- 238000003825 pressing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model relates to a MIM sintering base hole expansion shaping device, comprising a lower die, go up mould and product stopper, the shore is provided with the spring between the lower surface of product stopper and the upper surface of lower mould, the upper surface of product stopper is provided with the spacing step of reaming mold insert, the spacing step of reaming mold insert includes first step bottom surface and first step lateral surface, be provided with two reaming mold inserts on the first step bottom surface at least, the periphery of the spacing step of reaming mold insert still is provided with the spacing step of product, the spacing step of product includes second step bottom surface and second step lateral surface, the reaming mold insert includes the plane of extrusion, still be provided with the through-hole on the first step bottom surface, still include first guide structure on the reaming mold insert, be provided with second guide structure on the profile modeling insert, cross section size from the upper end of profile modeling mold insert to lower extreme. The MIM sintering base hole expansion shaping device of this application can improve the quality of processing product, gets a convenience moreover.
Description
Technical Field
The application relates to an inner hole expanding device field, in particular to an inner hole expanding and shaping device for an MIM sintering blank.
Background
MIM metal fabrication is widely used in manufacturing, and MIM is a molding method in which a plasticized mixture of metal powder and its binder is injected into a mold. The method comprises the steps of mixing the selected metal powder with a binder, granulating the mixture, and then performing injection molding to obtain the required shape. When the MIM metal manufacturing process is adopted for production, after injection molding is finished, the obtained semi-finished product is also subjected to de-bonding and sintering. The semi-finished product can be deformed irregularly during the debinding and sintering, thereby causing the produced product to be unqualified.
For example, in the conventional art, when a conductive harness member for an automobile controller is manufactured, after the semi-finished conductive harness member is sintered, the inner diameter dimension of the conductive harness member is greatly shrunk, and the actual length dimension of the product in the X direction is slightly reduced. Therefore, the inner bore of the wire harness member needs to be subsequently reshaped. And the plastic scheme among the prior art adopts the profile modeling mold insert that has the tapering to carry out direct contact reaming.
The defects of the prior art are that although the size of the inner hole of the product is improved, the appearance is poor, the scratch of the inner wall of the product is serious, and the sizes of the inner hole in other directions are interfered, so that the quality of the produced product is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the purpose of this application provides a MIM sintering base hole expansion shaping device, adopts the device to carry out the product hole expansion and can not cause the fish tail to the inner wall of product, can not cause the interference to other sizes that need not the expansion of product hole moreover, has effectively improved the quality of product, moreover, utilizes spring reaction force to upwards bounce the product stopper and open when taking out the product, conveniently gets the piece.
The above object of the present application is achieved by the following technical solutions:
an inner hole expanding and shaping device for an MIM sintering blank comprises a lower die for fixing a profiling insert, an upper die capable of moving up and down relative to the lower die and a product limiting block arranged between the upper die and the lower die, wherein a spring is supported between the lower surface of the product limiting block and the upper surface of the lower die, and the upper die is used for extruding the product limiting block to move towards the lower die; the upper surface of the product limiting block is provided with a reaming insert limiting step, the reaming insert limiting step comprises a first step bottom surface and a first step outer side surface, at least two reaming inserts are arranged on the first step bottom surface, the periphery of the reaming insert limiting step is also provided with a product limiting step, the product limiting step comprises a second step bottom surface and a second step outer side surface, the reaming insert comprises an extrusion surface for extruding an inner hole of a semi-finished product, other surfaces of the reaming insert are arranged away from the semi-finished product, the extrusion surfaces of the reaming inserts are arranged in a reverse mode, and the extrusion surface, the second step bottom surface and the second step outer side surface form a clamping groove for mounting the semi-finished product; the reaming insert is characterized in that a through hole for the profiling insert to pass through is further formed in the bottom surface of the first step, a first guide structure is further arranged on the reaming insert, a second guide structure which is in guide sliding fit with the first guide structure of each reaming insert is arranged on the profiling insert respectively, the second guide structure extends from the upper end to the lower end of the profiling insert, the upper end of the profiling insert is arranged in the through hole, each reaming insert is arranged at the upper end of the profiling insert, the size of the cross section of the profiling insert from the upper end to the lower end of the profiling insert is gradually increased, and a movable space of the reaming insert is formed among the profiling insert, the bottom surface of the first step and the outer side surface of.
Through adopting above-mentioned technical scheme, the MIM sintering base hole expansion shaping device of this application is when using, move the relative lower mould of extrusion product stopper through last mould relative lower mould and move, and then make the reaming mold insert from the upper end of profile modeling mold insert to lower extreme direction removal, along with the cross section size crescent of profile modeling mold insert, the reaming mold insert is extruded by the profile modeling mold insert and is outwards removed in the horizontal direction, and then treat reaming semi-manufactured goods hole through the extrusion face extrusion, realize semi-manufactured goods reaming, it can not lead to the fact the fish tail to the inner wall of product to stably extrude semi-manufactured goods hole through the extrusion face, and the size that need not to enlarge to other of product hole can not lead to the fact the interference, the quality of product has effectively been improved, moreover, utilize spring reaction force to upwards bounce out the product stopper when taking out the.
The application can be further configured in a better example, and a guide post is further arranged among the upper die, the product limiting block and the lower die.
Through adopting above-mentioned technical scheme, can realize the direction removal between the three, avoid appearing the deviation, influence product quality.
The application can be further configured in a better example, the upper surface of the lower die is provided with a spring mounting hole for mounting the spring, and the upper end of the spring is fixedly connected with the lower surface of the product limiting block.
Through adopting above-mentioned technical scheme, can be so that the spring is more stable in compression process, avoid appearing crooked.
The application can be further configured in a preferred example, the second guiding structure is a U-shaped sliding groove, and the first guiding structure is a sliding block matched with the U-shaped sliding groove.
This application can further configure to in a preferred example, the upper surface of product stopper still is provided with the step hole, and the downthehole stop screw that is provided with restriction product stopper home range of motion of step, stop screw's screw rod pass step hole and lower mould threaded connection.
Through adopting above-mentioned technical scheme, the distance that the product stopper was opened by the spring bullet can be controlled in the setting of stop screw.
The application can be further configured in a preferred example, the number of the springs is at least 3, the number of the spring mounting holes is at least three, and the spring mounting holes are circumferentially and uniformly arranged on the upper surface of the lower die by taking the center of the upper surface as a circle center at intervals.
Through adopting above-mentioned technical scheme for the application of force of spring is more even.
This application can further configure to in a preferred example, the bottom and the lower mould fixed connection of guide post, be provided with the guiding hole that corresponds from top to bottom with the guide post on product stopper and the last mould.
In a preferred example of the present application, the lower surface of the upper die is further provided with a pressing groove for pressing the semi-finished product and the reaming insert, and a side wall of the pressing groove is opposite to an outer side surface of the second step from top to bottom.
By adopting the technical scheme, only the reaming insert and the semi-finished product to be reamed can be prevented from being taken as stress points when the upper die is jacked and pressed on the product limiting block, so that the reaming insert and the semi-finished product to be reamed are protected.
Drawings
Fig. 1 is a schematic structural diagram of an overall internal hole expanding and reshaping device of an MIM sintered compact according to an embodiment of the present application.
Fig. 2 is a schematic sectional view of the inner hole expanding and shaping device of the MIM sintered compact of fig. 1.
Fig. 3 is a partial schematic structural view of the inner hole expanding and shaping device of the MIM sintered compact of fig. 1.
Fig. 4 is a schematic view of the assembled structure of the copying insert and the reaming insert of fig. 1.
Fig. 5 is a schematic structural view of the product stopper in fig. 1.
Fig. 6 is a schematic structural view of the upper mold and the upper mold fixing plate in fig. 1.
In the figure, 1, a copying insert; 11. a U-shaped chute; 2. a lower die; 21. a lower die fixing plate; 3. an upper die; 31. an upper die fixing plate; 4. a product stop block; 41. a reaming insert limiting step; 42. a product limiting step; 43. a through hole; 44. a card slot; 45. a product limiting plate; 46. a limit screw; 5. a spring; 6. reaming the insert; 61. extruding surface; 62. a slider; 7. a guide post; 8. semi-finished products; 9. and (6) pressing the groove.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
Referring to fig. 1 to 5, the present application discloses an MIM sintering blank inner bore expanding and shaping device, which includes a profiling insert 1, a lower mold 2 for fixing the profiling insert 1, a lower mold fixing plate 21, an upper mold 3 capable of moving up and down relative to the lower mold 2, an upper mold fixing plate 31, and a product limiting plate 45 disposed between the upper mold 3 and the lower mold 2. The lower die 2 is fixed on the lower die fixing plate 21 by bolts, and the upper die 3 is fixed on the upper die fixing plate 31 by bolts. The product limiting plate 45 is provided with two mounting holes, and each product limiting block 4 is fixedly mounted in each mounting hole 1. The spring 5 is arranged between the lower surface of the product limiting plate 45 and the upper surface of the lower die 2 in a supporting mode, and the upper die 3 is used for extruding the product limiting block 4 and the product limiting plate 45 to move towards the lower die 2. The upper surface of lower mould 2 is provided with the spring mounting hole that is used for installing spring 5, and the upper end and the product limiting plate 45 fixed connection of spring 5. Spring 5 is provided with 4, and the spring mounting hole is provided with 4, and each spring 5 sets up respectively in the central point at each edge of product limiting plate 45 puts and surrounds product stopper 4 for spring 5's application of force is more even.
Referring to fig. 2-5, the upper surface of the product limiting block 4 is provided with a reaming insert limiting step 41, the reaming insert limiting step 41 includes a first step bottom surface and a first step outer side surface, and at least two reaming inserts 6 are provided on the first step bottom surface. The periphery of the reaming insert limiting step 41 is further provided with a product limiting step 42, and the product limiting step 42 comprises a second step bottom surface and a second step outer side surface. Reaming insert 6 includes the face of extrusion 61 that is used for extrudeing the hole of semi-manufactured goods 8, and the face of extrusion 61 of each reaming insert 6 sets up back to back, and other faces and the semi-manufactured goods 8 of reaming insert 6 keep away empty the setting, and other faces and the semi-manufactured goods 8 of reaming insert 6 do not contact promptly to guarantee that reaming insert 6 can not lead to the fact the interference to other sizes that need not to enlarge of product hole. The pressing surface 61, the second step bottom surface and the second step outer side surface form a clamping groove 44 for mounting the semi-finished product 8. When the semi-finished product 8 is used, the semi-finished product 8 is placed in the clamping groove 44, and the extrusion surface 61 is attached to the part to be shaped of the inner hole of the semi-finished product 8. The bottom surface of the first step is further provided with a through hole 43 for the profile modeling insert 1 to pass through, the reaming insert 6 is further provided with a first guide structure, the profile modeling insert 1 is provided with a second guide structure which is respectively in guide sliding fit with the first guide structure of each reaming insert 6, the second guide structure is a U-shaped sliding groove 11 extending from the upper end to the lower end of the profile modeling insert 1, and the first guide structure is a sliding block 62 matched with the U-shaped sliding groove 11. The upper end of the copying insert 1 is arranged in the through hole 43, each reaming insert 6 is arranged at the upper end of the copying insert 1, the cross section size of the copying insert 1 is gradually increased from the upper end to the lower end of the copying insert 1, and a moving space of the reaming insert 6 is formed among the copying insert 1, the bottom surface of the first step and the outer side surface of the first step. During the use, remove extrusion product limiting plate 45 and remove relative lower mould 2 through last mould 3 relative lower mould 2, and then make reaming mold insert 6 from the upper end of profile modeling mold insert 1 to lower extreme direction removal, along with profile modeling mold insert 1's cross section size crescent, reaming mold insert 6 is by profile modeling mold insert 1 extrusion outwards removal in the horizontal direction, and then extrudees through extrusion face 61 and treats reaming 8 hole of reaming semi-manufactured goods, realizes 8 reaming of semi-manufactured goods.
Referring to fig. 2 and 3, still be provided with guide post 7 between last mould 3, product limiting plate 45 and the lower mould 2, the bottom and the lower mould 2 fixed connection of guide post 7, be provided with the guiding hole that corresponds from top to bottom with guide post 7 on product limiting plate 45 and the last mould 3, the direction that sets up between the three is removed can be guaranteed in the setting of guide post 7. The upper surface of the product limiting plate 45 is also provided with a step hole, a limiting screw 46 for limiting the vertical moving range of the product limiting plate 45 is arranged in the step hole, and a screw rod of the limiting screw 46 penetrates through the step hole to be in threaded connection with the lower die 2. When the product is taken, the upper die 3 moves upwards, the product limiting plate 45 moves upwards under the action of the spring 5, and when the product moves to the farthest position in the moving range, the head of the limiting screw 46 is in stop fit with the step surface of the step hole to limit the movement of the product limiting block 4, so that the distance of the product limiting block 4 bounced off by the spring 5 is controlled. The lower surface of the upper die 3 is also provided with a jacking groove 9 for jacking the semi-finished product 8 and the reaming insert 6, and the side wall of the jacking groove 9 is arranged opposite to the outer side surface of the second step up and down. When the reaming insert 6 and the semi-finished product 8 to be reamed enter the jacking groove 9 during use, the bottom wall of the jacking groove 9 jacks the semi-finished product, and the rest of the upper die 3 jacks the rest of the product limiting plate 45, so that only the reaming insert 6 and the semi-finished product 8 to be reamed serve as stress points when the upper die 3 jacks the product limiting plate 45, and the reaming insert 6 and the semi-finished product 8 to be reamed are protected.
The implementation principle of the embodiment is as follows: when the inner hole expanding and shaping device for the MIM sintering blank is used, the upper die 3 is driven to move relative to the lower die 2 to extrude a product limiting block 4 to move relative to the lower die 2, so that a reaming insert 6 is guided to move from the upper end to the lower end of the profiling insert 1, the reaming insert 6 is extruded by the profiling insert 1 to move outwards in the transverse direction along with the gradual increase of the cross section size of the profiling insert 1, an inner hole of a semi-finished product 8 to be reamed is extruded through an extrusion surface 61, the reaming of the semi-finished product 8 is realized, the inner hole of the semi-finished product 8 is stably extruded through the extrusion surface 61 without scratching the inner wall of the product, and no interference is caused to other sizes of the inner hole of the product which do not need to be reamed, the quality of the product is effectively improved, in addition, the reaction force of a spring 5 is utilized to spring the product limiting, the reaming insert 6 does not extrude the product any more, and the product is convenient to take down.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a hole expansion shaping device in MIM sintering base, includes profile modeling mold insert (1), its characterized in that: the profiling mold comprises a lower mold (2) for fixing a profiling mold insert (1), an upper mold (3) capable of moving up and down relative to the lower mold (2) and a product limiting block (4) arranged between the upper mold (3) and the lower mold (2), wherein a spring (5) is arranged between the lower surface of the product limiting block (4) and the upper surface of the lower mold (2) in a supporting manner, and the upper mold (3) is used for extruding the product limiting block (4) to move towards the lower mold (2);
the upper surface of the product limiting block (4) is provided with a reaming insert limiting step (41), the reaming insert limiting step (41) comprises a first step bottom surface and a first step outer side surface, at least two reaming inserts (6) are arranged on the first step bottom surface, a product limiting step (42) is further arranged on the periphery of the reaming insert limiting step (41), the product limiting step (42) comprises a second step bottom surface and a second step outer side surface, the reaming insert (6) comprises a squeezing surface (61) for squeezing an inner hole of a semi-finished product (8), other surfaces of the reaming insert (6) and the inner hole of the semi-finished product (8) are arranged in a clearance mode, the squeezing surfaces (61) of the reaming inserts (6) are arranged in a reverse mode, and the squeezing surface (61), the second step bottom surface and the second step outer side surface form a clamping groove (44) for mounting the semi-finished product (8);
the reaming insert is characterized in that a through hole (43) for the profiling insert (1) to pass through is further formed in the bottom surface of the first step, a first guide structure is further arranged on the reaming insert (6), a second guide structure which is respectively in guide sliding fit with the first guide structure of each reaming insert (6) is arranged on the profiling insert (1), the second guide structure extends from the upper end to the lower end of the profiling insert (1), the upper end of the profiling insert (1) is arranged in the through hole (43), each reaming insert (6) is arranged at the upper end of the profiling insert (1), the size of the cross section of the profiling insert (1) is gradually increased from the upper end to the lower end of the profiling insert (1), and a movable space of the reaming insert (6) is formed among the profiling insert (1), the bottom surface of the first step and the outer side surface of the first step.
2. The MIM sintered compact bore expansion reshaping device of claim 1, wherein: and guide columns (7) are also arranged among the upper die (3), the product limiting block (4) and the lower die (2).
3. The MIM sintered compact bore expansion reshaping device of claim 2, wherein: the upper surface of lower mould (2) is provided with and is used for installing the spring mounting hole of spring (5), the upper end and the product stopper (4) fixed connection of spring (5).
4. The MIM sintered compact bore expansion reshaping device of claim 1, wherein: the second guide structure is a U-shaped sliding groove (11), and the first guide structure is a sliding block (62) matched with the U-shaped sliding groove (11).
5. The MIM sintered compact bore expansion reshaping device of claim 1, wherein: the upper surface of the product limiting block (4) is further provided with a step hole, a limiting screw (46) limiting the moving range of the product limiting block (4) is arranged in the step hole, and a screw rod of the limiting screw (46) penetrates through the step hole to be in threaded connection with the lower die (2).
6. The MIM sintered compact bore expansion reshaping device of claim 3, wherein: the number of the springs (5) is at least 3, the number of the spring mounting holes is at least three, and the spring mounting holes are circumferentially and uniformly arranged on the upper surface of the lower die (2) at intervals by taking the center of the upper surface as a circle center.
7. The MIM sintered compact bore expansion reshaping device of claim 2, wherein: the bottom and the lower mould (2) fixed connection of guide post (7), be provided with the guiding hole that corresponds from top to bottom with guide post (7) on product stopper (4) and last mould (3).
8. The MIM sintered compact bore expansion reshaping device of claim 1, wherein: the lower surface of the upper die (3) is also provided with a jacking groove (9) for jacking the semi-finished product (8) and the reaming insert (6), and the side wall of the jacking groove (9) and the outer side surface of the second step are arranged in a vertically opposite mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021704420.5U CN212857208U (en) | 2020-08-14 | 2020-08-14 | Expanding and shaping device for inner hole of MIM sintered blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021704420.5U CN212857208U (en) | 2020-08-14 | 2020-08-14 | Expanding and shaping device for inner hole of MIM sintered blank |
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| Publication Number | Publication Date |
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| CN212857208U true CN212857208U (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021704420.5U Active CN212857208U (en) | 2020-08-14 | 2020-08-14 | Expanding and shaping device for inner hole of MIM sintered blank |
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| CN (1) | CN212857208U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111957767A (en) * | 2020-08-14 | 2020-11-20 | 上海富驰高科技股份有限公司 | Expanding and shaping device for inner hole of MIM sintered blank |
| CN114918276A (en) * | 2022-05-16 | 2022-08-19 | 苏州中耀科技有限公司 | Parts shaping device and method |
-
2020
- 2020-08-14 CN CN202021704420.5U patent/CN212857208U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111957767A (en) * | 2020-08-14 | 2020-11-20 | 上海富驰高科技股份有限公司 | Expanding and shaping device for inner hole of MIM sintered blank |
| CN111957767B (en) * | 2020-08-14 | 2024-05-24 | 上海富驰高科技股份有限公司 | MIM sintering blank inner hole expansion shaping device |
| CN114918276A (en) * | 2022-05-16 | 2022-08-19 | 苏州中耀科技有限公司 | Parts shaping device and method |
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