CN-224222355-U - Shaft closed extrusion molding device

CN224222355UCN 224222355 UCN224222355 UCN 224222355UCN-224222355-U

Abstract

The utility model discloses a shaft closed extrusion molding device, which comprises an upper die plate and a lower die plate, wherein a lower die core with a lower core hole is fixedly connected to the top surface of the lower die plate, a sliding seat is fixedly connected to the bottom surface of the upper die plate and positioned above the lower die core, a sliding hole is arranged on the sliding seat in a penetrating manner along the vertical direction, an upper die core with the upper core hole is in sliding fit in the sliding hole, a limiting part capable of limiting the lower end of the upper die core, which is used for sliding out of the lower end of the sliding hole, is arranged on the sliding seat, when the upper die plate moves downwards, the upper die core and the lower die core can be clamped, the upper core hole and the lower core hole can be communicated to form a molding die cavity, an extrusion rod which is arranged on the bottom surface of the upper die plate and is coaxial with the upper core hole is fixedly connected to the lower end of the extrusion rod, the lower end of the extrusion rod can extend into the upper core hole and be in sliding fit with the upper core hole along the vertical direction, and after the upper die core and the lower die core are clamped, the upper die plate moves downwards, so that the lower end of the extrusion rod can extend into the molding die cavity to be extruded and molded.

Inventors

CHEN ZHONG
JING YONG
HU BIN
CHEN YIMING

Assignees

重庆升科精锻科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250516

Claims (7)

1. The shaft closed extrusion molding device is characterized in that a lower mold core is fixedly connected to the top surface of the lower mold core, a lower core hole is formed in the top surface of the lower mold core in a vertical direction, a slide seat is fixedly connected to the bottom surface of the upper mold core and located above the lower mold core, a slide hole penetrates through the slide seat in the vertical direction, an upper mold core is slidably matched in the slide hole in the vertical direction, a limiting part capable of limiting the lower end of the upper mold core in a sliding mode is arranged on the slide seat, an upper core hole which is arranged on the upper mold core in a mode of being coaxial with the lower core hole is penetrated through the upper mold core, when the upper mold core moves downwards, the upper mold core and the lower mold core can be communicated to form a molding mold cavity, the height of the molding mold cavity is larger than that of an extrusion rod which is arranged on the bottom surface of the upper mold core hole in a mode, the lower end of the extrusion rod can extend into the upper core hole and be slidably matched with the upper core hole in the vertical direction, and the lower end of the extrusion rod can extend into the molding mold cavity after the upper mold core hole and the lower mold core hole are moved downwards.
2. The shaft closed type extrusion molding device according to claim 1, wherein a limit seat is fixedly connected to the top surface of the lower die plate, a limit hole is formed in the limit seat in a penetrating manner in the vertical direction, a mounting hole is concavely formed in the position, located in the limit hole, of the top surface of the lower die plate, a base plate is arranged on the bottom of the mounting hole, the lower die core is arranged on the top surface of the base plate, a pressing block which can be in sliding fit with the lower die core in the vertical direction and is pressed on the lower die core is sleeved on the lower die core, the lower end of the pressing block extends into the limit hole and can be in sliding fit with the limit hole in the vertical direction, a pressing plate which is pressed on the pressing block is sleeved on the position, located above the limit seat, of the pressing block, and the pressing plate is connected with the limit seat through a fastening bolt and can enable the pressing plate to press the lower die core on the base plate through the pressing block.
3. The shaft type closed extrusion molding device according to claim 1, wherein the lower core hole is a perforation, a top block with the same cross-sectional shape as the lower end hole of the lower core hole is arranged at the lower end hole of the lower core hole, the top block is arranged on the lower die plate and can move in the lower core hole along the vertical direction, a top rod hole communicated with the lower core hole is penetrated in the vertical direction at the position of the lower die plate corresponding to the lower core hole, and a top rod which extends downwards vertically and penetrates through the top rod hole is arranged on the bottom surface of the top block.
4. The closed-type extrusion molding device for shafts of claim 1, wherein a notch is concavely arranged on the bottom surface of the upper mold core along the vertical direction, and when the upper mold plate moves downwards, the top of the lower mold core can extend into the notch and is in sliding fit with the notch along the vertical direction.
5. The shaft closed type extrusion molding device of claim 1, wherein the limiting part comprises a plurality of sliding grooves which are arranged on the inner wall of the sliding hole and uniformly arranged at intervals around the central line direction of the sliding hole, the sliding grooves extend downwards from the upper end of the sliding hole along the vertical direction, sliding blocks are respectively formed at the upper end of the outer wall of the upper mold core in a protruding mode at positions corresponding to the sliding grooves, and the sliding blocks extend into the corresponding sliding grooves and can be in sliding fit with the sliding grooves along the extending direction of the sliding grooves.
6. The shaft type closed extrusion molding device according to claim 1, wherein a plurality of telescopic springs are arranged in the sliding hole and positioned between the upper mold core and the upper mold plate, the telescopic springs are uniformly arranged at intervals around the central line direction of the sliding hole, and two ends of the telescopic springs are respectively abutted against the upper mold core and the upper mold plate.
7. The shaft type closed extrusion molding device of claim 1, wherein the bottom surface of the upper die plate is fixedly connected with a guide pipe which extends vertically downwards, the top surface of the lower die plate is fixedly connected with a guide post which is arranged with the same center line as the guide pipe, and the upper end of the guide post stretches into an inner hole of the guide pipe and can be in sliding fit with the guide pipe along the vertical direction.

Description

Shaft closed extrusion molding device Technical Field The utility model relates to the field of shaft part machining, in particular to a shaft closed extrusion molding device. Background Under the existing open die structure, the metal material is extremely easy to generate transverse overflow along the parting surface of the die under the action of high-pressure extrusion pressure, so that irregular flash burrs are formed. The technical defects are mainly caused by insufficient mold closing precision, uneven cavity pressure distribution and lack of material flow control. The generation of flash not only reduces the dimensional accuracy and the surface quality of parts, but also forces the production enterprises to increase secondary processing procedures such as subsequent cutting, polishing and the like, thereby increasing the production cost by about 15-20 percent and reducing the utilization rate of raw materials. Particularly in a mass production scene, the secondary processing link can obviously prolong the production period, simultaneously generate a large amount of metal scraps and increase the waste treatment cost. The existing improvement scheme mostly adopts a mode of improving the processing precision of the die, but the manufacturing cost of the die can be obviously improved. Therefore, how to realize the effective control of the flash without obviously increasing the process complexity becomes a technical bottleneck for restricting the development of the shaft part extrusion process. Disclosure of utility model Aiming at the defects of the prior art, the utility model aims to provide a shaft closed type extrusion molding device which can realize the precise guiding control of the flow of metal materials, realize the one-time extrusion molding of shaft parts and does not need secondary processing. In order to solve the technical problems, the utility model adopts the following technical scheme: The utility model provides a shaft class closed extrusion forming device, including upper template and lower bolster relatively set up from top to bottom, fixedly connected with lower mold core on the top surface of lower bolster, be provided with down the core hole along vertical direction on the top surface of lower mold core, just be located the position fixedly connected with slide of lower mold core top on the bottom surface of upper template, wear to be equipped with the slide hole along vertical direction on the slide, along vertical direction sliding fit there being the upper mold core in the slide hole, be provided with the spacing portion that can carry out spacing to the upper end of upper mold core slide out the slide hole on the slide, wear to be equipped with on the upper mold core with the upper core hole that lower core hole is with the central line setting, when the upper template moves down, can make upper mold core and lower mold core carry out the compound die and make upper core hole and lower core hole can communicate and form the shaping die cavity, the height of shaping die cavity is greater than waiting to process the height of embryo, fixedly connected with the extrusion rod that sets up with upper core hole and be located the bottom surface of upper mold core hole, the lower extreme of extrusion rod can stretch into in the upper mold core hole and can be followed vertical direction and upper mold core hole sliding fit, when upper mold core hole and lower die core hole extrusion rod are gone into shaping die cavity. When the shaft blank extrusion device is used, firstly, the lower end of the shaft blank is inserted into the lower core hole to limit the shaft blank, then the upper die plate is driven to move downwards, firstly, the upper die core can be contacted with the lower die core downwards to complete die assembly with the lower die core, and the whole shaft blank is also accommodated in the molding die cavity, and along with continuous descending of the upper die plate, the upper die core is kept motionless, and the extrusion rod extends downwards into the molding die cavity from the upper end hole of the upper die core hole, so that extrusion of the shaft blank is realized. Because the axle embryo belongs to a closed space in the shaping die cavity, consequently when the extrusion pole extrudees it, can control the flow of material, closed shaping die cavity also avoids the overlap that the horizontal overflow that traditional open mould die joint produced formed simultaneously, has improved shaping quality. As the optimization, fixedly connected with spacing seat on the top surface of lower bolster, wear to be equipped with spacing hole along vertical direction on the spacing seat, the top surface of lower bolster just is located the concave mounting hole that is equipped with in position in spacing hole, has placed in the backing plate on the hole bottom of mounting hole, the lower mold core is placed in on the top surface of backing plate, the cover be equipped with o