CN210817458U - Powder metallurgy rotating ring compacting die - Google Patents

Abstract

The utility model relates to a powder metallurgy rotating ring embossing mold utensil relates to the technical field that powder metallurgy mould made, has solved the rotating ring and need can machine-shaping through fixed, many times turning of many times repetition clamping, grinding in man-hour, complex operation, problem that production efficiency hangs down, and it includes: the punching die comprises a female die, a lower punch inserted on the female die and abutted against the inner peripheral wall of the female die, a first core rod inserted on the upper side of the lower punch and abutted against the inner peripheral wall of the lower punch, a second core rod arranged on the upper side of the first core rod and an upper punch inserted between the female die and the second core rod; six forming grooves which are uniformly distributed along the circumferential direction are further formed in the circumferential wall of the second core rod, and six forming blocks which are uniformly distributed along the circumferential direction, mutually attached to the forming grooves and connected in a sliding mode are integrally arranged on the inner circumferential wall of the upper punch. The utility model discloses it is convenient to have production, easy operation has improved the effect of the production efficiency of rotating ring.

Description

A powder metallurgy dynamic ring pressing die

technical field

The utility model relates to the technical field of powder metallurgy mold manufacturing, in particular to a powder metallurgy dynamic ring pressing mold.

Background technique

Powder metallurgy is a process technology for preparing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, after forming and sintering, to manufacture metal materials, composite materials and various types of products.

As shown in FIG. 1, it is an existing mechanical seal moving ring 8, including a ring body 81 and six inner bumps 82 integrally provided on the inner peripheral wall of the ring body 81 and evenly distributed along the circumferential direction. The inner bumps 82 The upper and lower sides of the ring are provided with conical surfaces 83; in the prior art, the moving ring 8 is sequentially processed by cutting machine cutting, lathe turning, and grinding machine grinding.

The above-mentioned prior art solutions have the following defects: the moving ring needs to be processed and formed through repeated clamping and fixing, multiple turning and grinding during processing, the operation is cumbersome, the production efficiency is low, and there is still room for improvement.

Utility model content

The purpose of the utility model is to provide a powder metallurgy moving ring pressing die, which is convenient to produce, simple to operate, and improves the production efficiency of the moving ring.

The above-mentioned utility model purpose of the present utility model is achieved through the following technical solutions:

A powder metallurgy moving ring pressing die, comprising a female die, a lower punch inserted on the female die and abutting with the inner peripheral wall of the female die, and a lower punch inserted into the upper side of the lower punch and abutted with the inner peripheral wall of the lower punch a first core rod, a second core rod arranged on the upper side of the first core rod, and an upper punch inserted between the female die and the second core rod;

The outer peripheral wall of the second core rod is also provided with six forming grooves uniformly distributed along the circumferential direction, and the inner peripheral wall of the upper punch is integrally provided with six uniformly distributed forming grooves along the circumferential direction. Formed blocks for slip connections.

By adopting the above technical solution, the space between the female die and the second core rod is filled with metal powder, and then the upper punch is punched, and the metal powder is squeezed by the upper punch, the lower punch, the female die and the second core rod. After forming, the finished moving ring can be obtained after less connection, the production is convenient, the operation is simple, and the production efficiency of the moving ring is improved.

The utility model is further provided as follows: it further comprises a bottom pad, the bottom pad is provided with an insertion slot for inserting the lower punch, and the female mold is in contact with the bottom pad.

By adopting the above technical solution, the setting of the bottom pad provides support for the female mold, the lower punch and the first core rod, which facilitates the overall movement of the mold and improves the moving efficiency of the mold. Lower the bottom pad, place the die on the platform and press it again by the ordinary press, so that the lower end of the lower punch is flush with the lower end of the first core rod, so as to realize the supplementary pressure, solve the problem of the density gradient of the green compact, and realize the two-way pressure Function.

The utility model is further provided that: a side of the second core rod close to the first core rod is integrally provided with an insertion column, and the first core rod is provided with an insertion hole for the insertion column to be inserted into.

By adopting the above technical solution, the second core rod is installed on the first core rod through the insertion of the insertion post and the socket, which facilitates the installation and positioning of the second core rod, and at the same time makes it difficult for the second core rod to interact with the first core rod. The relative displacement improves the stability of the second core rod when it is used.

The utility model is further configured as follows: a guide surface is arranged on the edge and corner of the female die close to the upper punch.

By adopting the above technical solution, the guide surface is arranged to guide the upper punch to be inserted into the gap between the female die and the second core rod, thereby improving the installation efficiency of the upper punch.

The utility model is further provided as follows: it further comprises a limiting cylinder arranged on the upper side of the female mold.

By adopting the above technical solution, the setting of the limiting cylinder limits the punching stroke of the upper punch, so that the upper punch is not easily punched excessively, resulting in the size of the product being smaller than the predetermined size, and the rejection rate of the product produced by the mold is reduced. , while improving the dimensional accuracy of the product.

The utility model is further provided that: a positioning ring is integrally provided on the end face of the limiting cylinder close to the female mold, and the female mold is provided with a positioning groove for the positioning ring to be inserted.

By adopting the above technical solution, the limit cylinder is installed on the female die through the insertion of the positioning ring and the positioning groove, the structure is simple, and the installation is convenient. barrel stability.

The utility model is further provided that: the end surface of the second core rod away from the first core rod is provided with at least one first indication groove indicating the position of the forming groove, and the end surface of the upper punch away from the lower punch is provided with an indicator The second indicating groove corresponding to the position of the forming block and the first indicating groove.

By adopting the above technical solution, the first indication groove indicates the position of the forming groove, the second indication groove indicates the position of the forming block, and the first indication groove and the second indication groove cooperate to indicate the alignment position of the forming groove and the forming block, so as to facilitate the installation For the upper punch, the installation efficiency of the second core rod is improved.

The utility model is further provided that: both the first indication groove and the second indication groove are arranged in a triangular shape.

By adopting the above technical solution, when the tip of the first indicator groove is aligned with the tip of the second indicator slot, the forming block is aligned with the forming groove, and at this time, the upper punch can be directly inserted and installed between the female die and the second core rod. time, the installation efficiency of the second core rod is improved.

To sum up, the beneficial technical effects of the present utility model are:

1. The production is convenient, the operation is simple, and the production efficiency of the moving ring is improved;

2. The bottom pad provides support for the female mold, the lower punch and the first core rod, which facilitates the overall movement of the mold, improves the moving efficiency of the mold, and can supplement the pressure to solve the density gradient problem of the green compact;

3. The setting of the limit cylinder limits the punching stroke of the upper punch, so that the upper punch is not easy to punch excessively and the size of the product is smaller than the predetermined size, which improves the dimensional accuracy of the product.

Description of drawings

Figure 1 is a schematic structural diagram of a mechanical seal moving ring.

Figure 2 is a schematic structural diagram of a powder metallurgy dynamic ring pressing die of the present invention.

Figure 3 is a schematic diagram of the explosion of a powder metallurgy moving ring pressing die.

FIG. 4 is an enlarged view of part A in FIG. 3 .

FIG. 5 is an enlarged view of part B in FIG. 3 .

Figure 6 is an exploded schematic view of the upper punch and the second core rod.

FIG. 7 is an enlarged view of the portion C in FIG. 6 .

FIG. 8 is an enlarged view of a portion D in FIG. 6 .

In the figure, 1, female mold; 11, guide surface; 12, positioning groove; 2, lower punch; 3, first core rod; 31, socket; 4, second core rod; 41, forming groove; 42, Insertion column; 43, first indicator slot; 5, upper punch; 51, forming block; 52, second indicator slot; 6, bottom pad; 61, insertion slot; 7, limit cylinder; 71, positioning ring 8, moving ring; 81, ring body; 82, inner bump; 83, tapered surface.

Detailed ways

The present utility model will be described in further detail below in conjunction with accompanying drawings 2-8.

Referring to FIG. 2 , a powder metallurgy dynamic ring pressing die disclosed by the utility model includes a female die 1 , a lower punch 2 , a first core rod 3 , an upper punch 5 , a bottom pad 6 and a limit cylinder 7 .

2 and 3, the bottom pad 6 can be either plate-shaped or disc-shaped, and the bottom pad 6 is preferably disc-shaped here; the lower punch 2 is arranged on the upper side of the bottom pad 6, and the lower punch 2 is cylindrical The upper side of the bottom pad 6 is provided with an insertion slot 61, the insertion slot 61 is arranged in a ring shape, and the insertion slot 61 and the bottom pad 6 are arranged concentrically. Install the lower punch 2 on the bottom pad 6 .

The female die 1 is sleeved on the lower punch 2, the lower end surface of the female die 1 is in contact with the bottom pad 6, the female die 1 and the bottom pad 6 are arranged concentrically, the inner peripheral wall of the female die 1 and the outer peripheral wall of the lower punch 2 Abutting, the first core rod 3 is inserted into the lower punch 2 , the outer peripheral wall of the first core rod 3 is in contact with the inner peripheral wall of the lower punch 2 , and the second core rod 4 is arranged on the top of the first core rod 3 On the side, the second core rod 4 and the first core rod 3 are arranged concentrically, the side of the second core rod 4 close to the first core rod 3 is integrally provided with a plug column 42 , and the first core rod 3 is provided with an insertion hole 31 , the socket 31 is used for the insertion post 42 to be inserted, so as to install the second core rod 4 on the first core rod 3 .

3 and 4, the upper punch 5 is inserted between the female die 1 and the second core rod 4, the upper punch 5 is arranged in a cylindrical shape, and the upper punch 5 and the second core rod 4 are arranged concentrically; The position cylinder 7 is sleeved on the upper punch 5, the lower end face of the position limit cylinder 7 is in contact with the upper end face of the female die 1, the lower end face of the position limit cylinder 7 is integrally provided with a positioning ring 71, and the positioning ring 71 and the position limit cylinder 7 are arranged concentrically.

3, 5, the upper end face of the female mold 1 is provided with a positioning groove 12, and the positioning groove 12 is used for the positioning ring 71 to be inserted, so as to install the limit cylinder 7 on the female mold 1; the limit cylinder 7 is used to limit the upper In the downward pressing stroke of the punch 5, when the punching end of the punching device abuts the upper end face of the limiting cylinder 7, the punching of the upper punch 5 is completed.

The upper side of the female die 1 is also provided with a guide surface 11 , and the guide surface 11 guides the upper punch 5 to be inserted between the female die 1 and the second core rod 4 , so as to facilitate the installation of the upper punch 5 .

6, the outer peripheral wall of the second core rod 4 is provided with six forming grooves 41, and the forming grooves 41 are evenly distributed along the circumferential direction of the second core rod 4; the inner peripheral wall of the upper punch 5 is also integrally provided with six forming grooves 41. The forming block 51, the forming block 51 and the forming groove 41 are attached to each other and slide, and the upper punch 5, the lower punch 2, the first core rod 3, the second core rod 4 and the female mold 1 are formed to be filled with metal powder. Extrusion to form the cavity of the moving ring 8 .

6, 7, the upper end surface of the second core rod 4 is provided with at least one first indicating groove 43, the first indicating groove 43 is used to indicate the position of the forming groove 41, and the first forming groove 41 is arranged in a triangular shape.

6, 8, the upper end face of the upper punch 5 is provided with a second indicating block, the second indicating block is used to indicate the position of the forming block 51, the second indicating block is arranged in a triangular shape, the first indicating block and the second indicating block are arranged in a triangle shape. The tips of the indicating blocks are disposed opposite to each other to match the alignment position of the indicating forming block 51 and the forming groove 41 , so as to facilitate inserting the upper punch 5 between the female die 1 and the second core rod 4 .

The implementation principle of this embodiment is:

Fill the metal powder into the cavity formed by the upper punch 5, the lower punch 2, the first core rod 3, the second core rod 4 and the female die 1, punch the upper punch 5 through the punching equipment, and squeeze the cavity. The metal powder is formed into the semi-finished moving ring 8, then the bottom pad 6 is removed, the mold and the semi-finished moving ring 8 are placed on the platform, and then the limit cylinder 7 is punched by an ordinary press, so that the lower end of the lower punch 2 is connected to the first core. The lower end of the rod 3 is flush to realize the supplementary pressure and solve the problem of the density gradient of the green compact. After the final sintering, the finished moving ring 8 can be obtained.

The examples of this specific embodiment are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention are not It should be covered within the protection scope of the present invention.

Claims (8)

1. A powder metallurgy dynamic ring pressing die, characterized in that it comprises a female die (1), a lower punch (2) inserted on the female die (1) and abutting with the inner peripheral wall of the female die (1), A first core rod (3) that is inserted into the upper side of the lower punch (2) and is in contact with the inner peripheral wall of the lower punch (2), and a second core rod (4) arranged on the upper side of the first core rod (3) ) and the upper punch (5) inserted between the female die (1) and the second core rod (4); The outer peripheral wall of the second core rod (4) is also provided with six forming grooves (41) evenly distributed along the circumferential direction, and the inner peripheral wall of the upper punch (5) is integrally provided with six circumferentially-distributed forming grooves (41). Forming blocks (51) that are evenly distributed and that are mutually abutted with the forming grooves (41) and are slidably connected. 2 . The powder metallurgy dynamic ring pressing die according to claim 1 , further comprising a bottom pad ( 6 ), and a bottom pad ( 6 ) is provided with a socket for the lower punch ( 2 ) to be plugged in. 3 . An insertion slot (61), the female mold (1) is in contact with the bottom pad (6). 3. A powder metallurgy dynamic ring pressing die according to claim 1, characterized in that: a side of the second core rod (4) close to the first core rod (3) is integrally provided with a plug-in column (42). ), the first core rod (3) is provided with an insertion hole (31) for the insertion column (42) to be inserted into. 4 . The powder metallurgy dynamic ring pressing die according to claim 1 , wherein a guide surface ( 11 ) is provided on the edge of the female die ( 1 ) close to the upper punch ( 5 ). 5 . 5. The powder metallurgy dynamic ring pressing die according to claim 1, characterized in that it further comprises a limiting cylinder (7) arranged on the upper side of the female die (1). 6 . The powder metallurgy dynamic ring pressing die according to claim 5 , wherein a positioning ring ( 71 ) is integrally provided on the end surface of the limiting cylinder ( 7 ) close to the female die ( 1 ). 7 . The female mold (1) is provided with a positioning groove (12) for inserting the positioning ring (71). 7. A powder metallurgy dynamic ring pressing die according to claim 1, characterized in that: at least one indicating molding groove ( 41) position of the first indicating groove (43), the end face of the upper punch (5) away from the lower punch (2) is provided with a position indicating the forming block (51) and corresponding to the first indicating groove (43). The second indicator slot (52). 8 . The powder metallurgy moving ring pressing die according to claim 7 , wherein the first indicator groove ( 43 ) and the second indicator groove ( 52 ) are both arranged in a triangular shape. 9 .

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