CN209886685U - Powder metallurgy shaping upper die - Google Patents
Powder metallurgy shaping upper die Download PDFInfo
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- CN209886685U CN209886685U CN201920565921.0U CN201920565921U CN209886685U CN 209886685 U CN209886685 U CN 209886685U CN 201920565921 U CN201920565921 U CN 201920565921U CN 209886685 U CN209886685 U CN 209886685U
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- upper die
- inner upper
- cushion block
- outer upper
- pressing plate
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Abstract
The utility model discloses an mould on powder metallurgy plastic, mould on the powder metallurgy plastic includes: the movable template comprises an inner upper die assembly, an outer upper die assembly, a movable template, a limiting sleeve and a spring; the inner upper die assembly comprises an inner upper die, an inner upper die cushion block and an inner upper die pressing plate, and the inner upper die is connected with the inner upper die cushion block through the inner upper die pressing plate; the outer upper die assembly comprises an outer upper die, an outer upper die cushion block and an outer upper die pressing plate, and the outer upper die is connected with the outer upper die cushion block through the outer upper die pressing plate; the outer mould, the outer mould cushion that goes up reaches portable template overlaps respectively and establishes interior mould outside, the stop collar cover is established portable template is outside, the spring set up in interior mould cushion with between the portable template, the stop collar is equipped with a spacing portion, spacing portion is right portable template plays limiting displacement. The utility model discloses simple structure has realized accurate plastic, avoids simultaneously causing the mould to damage among the plastic process.
Description
Technical Field
The utility model relates to a powder metallurgy technical field, especially a mould on powder metallurgy plastic.
Background
The powder metallurgy technology perfectly combines the material science and the metal forming technology, becomes a novel processing technology which is wide in quantity, efficient, material-saving, less in energy-saving and free of cutting, and is widely applied to products such as automobiles, agricultural machinery, textile machinery, household electrical appliance products and office machinery.
In recent years, with the rapid development of the automobile industry, powder metallurgy products are increasingly applied to power systems of automobiles due to the advantages of light weight, noise absorption, environmental protection and the like, along with the current development trend, more and more original cast parts are gradually replaced by powder metallurgy parts, higher requirements are provided for powder metallurgy manufacturing enterprises, the product structure is more and more complex, and the precision requirement is higher and higher.
In the powder metallurgy process, because a powder die-cast green body needs to be sintered and fused at high temperature, a sintered product can generate deformation and irregular size change, the product with higher precision requirement is placed in a shaping female die cavity after being sintered, pressure is applied to the product by an upper die and a lower die, and the shape and the size of the pressed product are fitted to a die, so that the precision requirement of the product is met. The finishing process is generally divided into three steps of mold entering, pressing and demolding.
Referring to fig. 1a, 1b and 1c, fig. 1a, 1b and 1c show a product structure used in the prior art. To make such a product structure, a top die structure as shown in fig. 2 is generally used. In the actual finishing process of the product shown in fig. 1a, 1b and 1c, in the mold-in stage, the product is placed on the mold-in mouth of the shaping cavity block and is brought into the cavity-forming section by being pressed down by the upper mold. Due to the particularity of the product structure, the product cannot be righted by the guide of the mold inlet, namely the product is asymmetric in appearance and has height drop, and the product is easy to deflect. Therefore, as shown in fig. 3a and 3b, the inner upper mold presses the product before the outer upper mold during the pressing process of the upper molds, and the product interferes with the mold, thereby causing damage to the mold.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the above-mentioned problem, provide an mould on powder metallurgy plastic, including interior last mould subassembly, outer last mould subassembly, portable template, stop collar and spring, utilize the concertina movement of spring and the limiting displacement of stop collar, make portable template and outer last mould subassembly can be piston reciprocating motion for interior last mould subassembly, realize carrying out the accurate plastic to the pressed compact of the special-shaped hole characteristic of many steps structure, avoid causing the mould to damage in the plastic process simultaneously.
In order to achieve the purpose, the utility model adopts the following technical scheme.
Providing a powder metallurgy plastic upper die, wherein the powder metallurgy plastic upper die comprises:
the device comprises an inner upper die assembly, an outer upper die assembly, a movable template, a limiting sleeve and a spring; the inner upper die assembly comprises an inner upper die, an inner upper die cushion block and an inner upper die pressing plate, the inner upper die is provided with a working end, and the inner upper die is connected with the inner upper die cushion block through the inner upper die pressing plate;
the outer upper die assembly comprises an outer upper die, an outer upper die cushion block and an outer upper die pressing plate, the outer upper die is provided with a working end face, and the outer upper die is connected with the outer upper die cushion block through the outer upper die pressing plate; and wherein the one or more of the one,
the outer upper die, the outer upper die cushion block and the movable template are respectively sleeved outside the inner upper die;
the limiting sleeve is sleeved outside the movable template;
the spring is arranged between the inner upper die cushion block and the movable template; wherein the content of the first and second substances,
one end of the movable template is connected with the outer upper die assembly and can move along the outer wall of the inner upper die and the inner wall of the limiting sleeve; one end of the limiting sleeve is fixed on the inner upper die pressing plate, the other end of the limiting sleeve is provided with a limiting part, and the limiting part limits the movable die plate.
Furthermore, the limiting part is a boss, the diameter of the joint of the movable template and the limiting part is changed, and the boss is connected with the movable template in a sliding type clamping manner.
Furthermore, one end of the inner upper die abuts against the inner upper die cushion block, the peripheral surface of the end of the inner upper die is connected with one end of the inner upper die pressing plate, the other end of the inner upper die pressing plate is connected with one end of the inner upper die cushion block, and the other end of the inner upper die cushion block is used for being connected with a machine tool template.
Furthermore, one end of the outer upper die abuts against the outer upper die cushion block, the peripheral surface of the end of the outer upper die is connected with one end of the outer upper die pressing plate, and the other end of the outer upper die pressing plate is connected with the outer upper die cushion block.
Further, the inner wall of the inner upper die is in close contact with the outer wall of the core rod, the outer upper die cushion block and the inner wall of the movable template are in close contact with the outer wall of the inner upper die, and the inner wall of the limiting sleeve is in close contact with the outer wall of the movable template.
In the powder metallurgy shaping upper die of the utility model,
utilize interior last mould subassembly, movable mould board, stop collar, spring, outer last mould subassembly, realize accurate plastic, can avoid simultaneously causing the damage of mould in the plastic process.
Simple structure, the practicality is strong, can be used to the shaping to have the multi-step compact structure spare of dysmorphism hole characteristic.
Drawings
Fig. 1a is a front sectional view of a prior art green compact.
Fig. 1b is a top view of the compact of fig. 1 a.
Fig. 1c is a schematic view of the structure of the compact of fig. 1 a.
Fig. 2 is a schematic view showing the assembly of a prior art swage.
Fig. 3a is a schematic diagram of the shaping process.
Figure 3b is a schematic view of the mold interfering with the product during the reforming process.
Fig. 4 is an assembly schematic diagram of a plastic upper die of the present invention.
Fig. 5 is a different state diagram of the upper shaping die according to the present invention.
Fig. 6a, 6b, 6c are usage effect diagrams of the upper mold for shaping in the present invention.
The reference numerals in the figures are respectively:
1. an upper die; 2. A core rod;
3. a female die; 4. A lower die;
5. pressing the blank; 11. An inner upper die assembly;
111. an inner upper die; 112. An inner upper mold platen;
113. an inner upper die cushion block; 12. An outer upper die assembly;
121. an outer upper die; 122. An outer upper mold platen;
123. an outer upper die cushion block; 13. A movable template;
14. a limiting sleeve; 141. A limiting part;
15. a spring.
Detailed Description
The concrete implementation mode of the utility model discloses a mould is gone up in powder metallurgy plastic is given below in combination with the attached drawing, but need point out: the described embodiments are not intended to limit the practice of the invention. All adopt the utility model discloses a similar structure and similar change all should go into the utility model discloses a protection scope. The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the embodiments, directional terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc. refer to directions of the attached drawings only. Accordingly, the directional terms used are used for describing and understanding the present invention, and are not used for limiting the present invention.
Referring to fig. 6a, 6b and 6c, the utility model provides a powder metallurgy shaping upper die, the powder metallurgy shaping upper die comprises an upper die 1, the upper die 1 is matched with a core rod 2, a female die 3 and a lower die 4, a pressed blank 5 is arranged among the upper die 1, the core rod 2, the female die 3 and the lower die 4, and the pressed blank 5 is a multi-step structural member with special-shaped hole characteristics; in the die entering stage and the pressing stage of the powder metallurgy finishing process, the upper die 1 is matched with the pressed compact 5 and the female die 3 to realize the precise shaping of the pressed compact 5.
Referring to fig. 4, the upper mold 1 includes: an inner upper die assembly 11, an outer upper die assembly 12, a movable die plate 13, a stop collar 14 and a spring 15.
Referring to fig. 4, the inner upper die assembly 11 includes an inner upper die 111, an inner upper die pressing plate 112 and an inner upper die cushion block 113, the inner upper die 111 is a "T" -shaped tubular structural member, an inner wall of the inner upper die 111 is in close contact with an outer wall of the mandrel 2, and the inner upper die 111 is connected to the inner upper die cushion block 113 through the inner upper die pressing plate 112 in a fixed connection manner. Specifically, one end of the inner upper die 111 having a step surface is abutted against the inner upper die cushion block 113, the outer peripheral wall of the end of the inner upper die 111 is connected to one end of the inner upper die pressing plate 112 in a step surface engagement manner, the other end of the inner upper die 111 is a working end (not numbered) for shaping the cavity of the green compact 5; the other end of the inner upper die pressing plate 112 is connected with one end of the inner upper die cushion block 113 in a bolt fastening manner, the inner upper die 111, the inner upper die pressing plate 112 and the inner upper die cushion block 113 of the inner upper die assembly 11 are fixedly connected, the powder metallurgy shaping upper die is fixed on a machine tool template (not numbered), and the machine tool template is provided with a press (not shown).
Referring to fig. 4, the outer upper die assembly 12 includes an outer upper die 121, an outer upper die pressing plate 122 and an outer upper die cushion block 123, the outer upper die 121 and the outer upper die cushion block 123 are respectively sleeved outside the inner upper die 111, an inner wall of the outer upper die 121 and an inner wall of the outer upper die cushion block 123 are respectively in close contact with an outer wall of the inner upper die 111, the outer upper die 121 has a working end surface (not numbered), and the working end surface of the outer upper die 121 is matched with the green compact 5 to shape the surface of the green compact 5; the outer upper die 121 is connected with the outer upper die cushion block 123 through the outer upper die pressing plate 122 in a fixed connection mode. Specifically, one end of the outer upper die 121 abuts against the outer upper die cushion block 123, and the outer peripheral surface of the end of the outer upper die 121 is in stepped surface clamping connection with one end of the outer upper die pressing plate 122; the other end of the outer upper die pressing plate 122 is connected with one end of the outer upper die cushion block 123 in a bolt fastening manner, so that the outer upper die 121 can be fixed on the outer upper die cushion block 123 by the outer upper die pressing plate 122, and the outer upper die 121, the outer upper die pressing plate 122 and the outer upper die cushion block 123 of the outer upper die assembly 12 are fixedly connected.
Referring to fig. 4, the movable die plate 13 is sleeved outside the inner upper die 111, an inner wall of the movable die plate 13 is in close contact with an outer wall of the inner upper die 111, one end of the movable die plate 13 is connected to the outer upper die assembly 12 and is movable along the outer wall of the inner upper die 111 and the inner wall of the limiting sleeve 14, and the other end of the movable die plate 13 is a movable end; the movable template 13 is connected with an outer upper die cushion block 123 of the outer upper die assembly 12 in a bolt fastening manner.
Referring to fig. 4, the limiting sleeve 14 is sleeved outside the movable mold plate 13, an inner wall of the limiting sleeve 14 is in close contact with an outer wall of the movable mold plate 13, one end of the limiting sleeve 14 is connected with the inner upper mold cushion block 113 in a bolt fastening manner, the other end of the limiting sleeve 14 is provided with a limiting portion 141, and the limiting portion 141 can limit the movable mold plate 13. In this embodiment, the limiting portion 141 is a boss, the diameter of the joint between the movable die plate 13 and the limiting portion 141 is changed, the diameter of the joint is smaller than the diameter of the movable end of the movable die plate 13, and the limiting portion 141 and the movable die plate 13 are slidably engaged to prevent the movable die plate 13 from being separated from the limiting sleeve 14.
Referring to fig. 4, the spring 15 is disposed between the movable mold plate 13 and the inner upper mold pad 113, counterbores (not numbered in the drawings) are respectively formed at the opposite positions of the movable mold plate 13 and the inner upper mold pad 113, the counterbores are used for accommodating the spring 15, two ends of the spring 15 are respectively fixedly connected with the movable mold plate 13 and the inner upper mold pad 113, and the spring 15 can drive the outer upper mold assembly 12 and the movable mold plate 13 to perform a telescopic motion.
Referring to fig. 4 and 5, in the present embodiment, the inner upper die assembly 11 is fixedly connected to the machine tool template, the stop collar 14 is fixedly connected to the inner upper die cushion block 113, and the outer upper die assembly 12, the movable template 13 and the spring 15 are movable relative to the inner upper die assembly 11; by utilizing the principle of an automobile engine, the spring 15 can drive the movable template 13 to perform piston type reciprocating motion in the limiting sleeve 14 by analogy with the motion form that the crankshaft drives the piston in the piston cylinder.
The method for using the powder metallurgy shaping upper die of the present invention is described in detail below with reference to fig. 6a, 6b, and 6 c.
Referring to fig. 6a, in the die-entering stage of the powder metallurgy finishing process, the green compact 5 is placed on the die-entering opening of the female die 3, the upper die 1 is pressed down by a press on the die plate of the machine tool, and the green compact 5 is brought into the forming section of the female die 3, i.e. the outer upper die 121 is firstly pressed onto the green compact 5, the working end surface of the outer upper die 121 is matched with the surface of the green compact 5, the upper die 1 is continuously pressed down, the outer upper die 121 shapes the green compact 5, and the inner upper die 111 is completely placed in the cavity of the outer upper die 121 in the die-entering process.
Referring to fig. 6b, as the machine tool template and the upper die 1 continue to be pressed down and enter the shaping and pressing stage, the green compact 5 presses the outer upper die 121 to achieve the preload pressure on the outer upper die 121, the outer upper die assembly 12 shown in fig. 4 moves, the movable template 13 slides relatively in the stop collar 14, and the spring 15 shown in fig. 4 is in a gradually compressed state until the surface profile of the green compact 5 completely fits the outer upper die 121, and the shaping of the surface profile of the green compact 5 is completed.
Referring to fig. 6c, the machine tool die plate is further pressed, the outer upper die 121 presses the green compact 5 further, the spring 15 shown in fig. 5 contracts further, and the movable die plate 13 shown in fig. 5 slides along the stop collar 14 and the inner upper die 111 further until the movable end of the movable die plate 13 shown in fig. 5 abuts on the inner upper die pad 113, at which time the movable die plate 13 and the outer upper die assembly 12 shown in fig. 5 are no longer movable; after that, the working end of the inner upper die 111 contacts with the green compact 5, the inner upper die 111 extends out of the cavity of the outer upper die 121 and enters the inner hole of the green compact 5, until the upper die 1 presses the green compact 5 into the forming section of the female die 3 completely, the green compact 5 can be centered in the forming section of the female die 3, and the green compact 5 becomes a symmetrical structural member without height difference. Thereby, powder metallurgy plastic go up the mould, can realize carrying out the plastic to the multi-step pressed compact structure spare that has the dysmorphism hole characteristic.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the structure of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The powder metallurgy plastic upper die is characterized by comprising:
the device comprises an inner upper die assembly, an outer upper die assembly, a movable template, a limiting sleeve and a spring; wherein the content of the first and second substances,
the inner upper die assembly comprises an inner upper die, an inner upper die cushion block and an inner upper die pressing plate, the inner upper die is provided with a working end, and the inner upper die is connected with the inner upper die cushion block through the inner upper die pressing plate;
the outer upper die assembly comprises an outer upper die, an outer upper die cushion block and an outer upper die pressing plate, the outer upper die is provided with a working end face, and the outer upper die is connected with the outer upper die cushion block through the outer upper die pressing plate; and wherein the one or more of the one,
the outer upper die, the outer upper die cushion block and the movable template are respectively sleeved outside the inner upper die;
the limiting sleeve is sleeved outside the movable template;
the spring is arranged between the inner upper die cushion block and the movable template; wherein the content of the first and second substances,
one end of the movable template is connected with the outer upper die assembly and can move along the outer wall of the inner upper die and the inner wall of the limiting sleeve; one end of the limiting sleeve is fixed on the inner upper die pressing plate, the other end of the limiting sleeve is provided with a limiting part, and the limiting part limits the movable die plate.
2. The upper die for powder metallurgy reshaping according to claim 1, wherein the limiting part is a boss, the diameter of the joint of the movable die plate and the limiting part is changed, and the boss is in sliding type clamping connection with the movable die plate.
3. The upper die for powder metallurgy shaping as set forth in claim 1, wherein one end of the inner upper die abuts against the inner upper die cushion block, the outer peripheral surface of the end of the inner upper die is connected to one end of the inner upper die pressing plate, the other end of the inner upper die pressing plate is connected to one end of the inner upper die cushion block, and the other end of the inner upper die cushion block is used for being connected to a machine tool template.
4. The upper die for powder metallurgy shaping of claim 1, wherein one end of the outer upper die abuts against the outer upper die cushion block, the outer peripheral surface of the end of the outer upper die is connected with one end of the outer upper die pressing plate, and the other end of the outer upper die pressing plate is connected with the outer upper die cushion block.
5. The upper die for powder metallurgy shaping of claim 1, wherein the inner wall of the inner upper die is in close contact with the outer wall of the mandrel, the inner walls of the outer upper die, the outer upper die cushion block and the movable die plate are in close contact with the outer wall of the inner upper die, and the inner wall of the limiting sleeve is in close contact with the outer wall of the movable die plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920565921.0U CN209886685U (en) | 2019-04-24 | 2019-04-24 | Powder metallurgy shaping upper die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920565921.0U CN209886685U (en) | 2019-04-24 | 2019-04-24 | Powder metallurgy shaping upper die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209886685U true CN209886685U (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920565921.0U Active CN209886685U (en) | 2019-04-24 | 2019-04-24 | Powder metallurgy shaping upper die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209886685U (en) |
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- 2019-04-24 CN CN201920565921.0U patent/CN209886685U/en active Active
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