CN208083410U - A kind of shaping dies of semi-solid squeeze casting shaft sleeve parts - Google Patents

Abstract

The utility model discloses a kind of shaping dies of semi-solid squeeze casting shaft sleeve parts, belongs to semi-solid-state shaping field.Mold described in the utility model includes upper mold, left cavity plate, right cavity plate etc.；Upper mold is connected with hydraulic press top, and hydraulic press control upper mold moves up and down；The pressure head diameter of upper mold corresponds to shaft sleeve parts interstitial hole internal diameter, and pressure head length corresponds to axle sleeve part height；Left cavity plate is connect with left hydraulic control system, right cavity plate is connect with right hydraulic control system, there are one cavities among lower die, cavity diameter corresponds to shaft sleeve parts flange diameter, the bottom end of feeding rod is connected with hydraulic press, hydraulic press control feeding rod moves up and down, and feeding shank diameter corresponds to the cavity internal diameter of lower die, feeding rod and lower die clearance fit；The cavity and lower die cavity formed after upper mold, left cavity plate, the molding of right cavity plate is point-blank.Mold described in the utility model using bottom filling squeeze, extrusion three received strength, drip molding good mechanical property, and it is easy to operate, easy to control, flow is short, can be achieved mechanization control, for forming Model For The Bush-axle Type Parts have certain guidance meaning.

Description

A Forming Die for Semi-solid Squeeze Casting Axle Sleeve Parts

technical field

The utility model relates to a forming die for semi-solid extrusion casting shaft sleeve parts, which belongs to the field of semi-solid forming.

Background technique

With the development of national industrialization, environmental protection, energy saving and consumption reduction are becoming more and more urgent, rational and effective use of resources, and improvement of product production efficiency are becoming more and more important. Metal semi-solid forming technology is one of the most promising forming technologies in the 21st century. Its short process and high efficiency have important guiding significance for saving resources and protecting the environment.

Metal semi-solid forming technology is a method of forming semi-solid metal paste in the solid-liquid two-phase temperature range. Compared with traditional casting and forging, metal semi-solid forming technology has a higher comprehensive utilization rate of materials, and can form parts with complex shapes and high precision and performance quality requirements. Semi-solid metal forming methods mainly include rheological forming and thixoforming. Among them, rheological forming is to use the semi-solid slurry obtained after the dendrites are broken during the metal solidification process to directly perform forming processing, which can realize rapid forming. Shaft sleeve parts have the functions of supporting the rotary shaft, positioning and guiding, and are often used in automobiles, high-speed rail, aerospace and other fields. The traditional bushing parts production method generally adopts liquid forming tubular blanks, and then through mechanical processing, the tubular blanks are turned into the required shape of the bushing parts. The bushing parts formed by this method, on the one hand, due to the uneven structure of the liquid forming , it is easy to produce defects such as shrinkage cavity and shrinkage porosity; on the other hand, the material utilization rate is low, and it is easy to generate a lot of waste, resulting in waste of resources. The semi-solid metal forming technology is used to squeeze and cast the bushing parts, the forming temperature is low, the extrusion force is small, and the near-net forming can be realized. Traditional extrusion casting of semi-solid metal parts usually adopts a top-to-bottom positive extrusion process. During the extrusion process, it is found that the solid-liquid two phases are easily separated, resulting in solid-liquid segregation and uneven organization of the formed sleeve parts. The use of bottom injection extrusion, that is, back extrusion, can make the filling more stable. During the bottom injection extrusion process, the slurry will not have solid-liquid separation due to gravity, which solves the problem of liquid-solid separation to a certain extent. It has a certain guiding significance for extrusion casting to form bushing parts, so it is very necessary to design a mold suitable for bottom injection extrusion.

Contents of the invention

The purpose of the utility model is to provide a forming mold for semi-solid extrusion casting shaft sleeve parts, including an upper mold 1, a left concave mold 2, a left hydraulic control system 3, a lower mold 5, a feeding rod 6, a right concave mold 7, Right hydraulic control system 8; the upper die 1 is connected to the top of the hydraulic press, and the hydraulic press controls the upper die 1 to move up and down; the diameter of the indenter of the upper die 1 corresponds to the inner diameter of the middle hole of the sleeve part 4, and the length of the indenter corresponds to the height of the sleeve part 4; the left concave The mold 2 is connected with the left hydraulic control system 3, the right die 7 is connected with the right hydraulic control system 8, and there is a cavity in the middle of the lower mold 5, the diameter of the cavity corresponds to the flange diameter of the sleeve part 4, and the bottom end of the feed rod 6 is connected to the The hydraulic machine is connected, and the hydraulic machine controls the feeding rod 6 to move up and down. The diameter of the feeding rod 6 corresponds to the inner diameter of the cavity of the lower die 5, and the feeding rod 6 and the lower die 5 have a clearance fit; after the upper die 1, the left die 2, and the right die 7 are closed The mold cavity formed is on a straight line with the lower mold 5 mold cavities, and the mold cavity formed after the upper mold 1, the left die 2, and the right die 7 is matched with the shaft sleeve part 4 shapes is corresponding.

The upper die 1 described in the utility model is fixed at the top of the hydraulic press through a T-shaped plate, and the lower die 5 is fixed at the bottom work surface of the hydraulic press through a T-shaped plate.

Ceramic heating coils are provided on the outsides of upper die 1, left die 2, lower die 5, feeding rod 6 and right die 7 described in the utility model.

The utility model described patrix 1, left die 2, lower die 5, feeding bar 6 and right die 7 die materials select H13 mold steel for use.

The left die 2 and the right die 7 described in the utility model are provided with a fixed slideway below, the left hydraulic control system 3 controls the left die 2 to move left and right, and the right hydraulic control system 8 controls the right die 7 to move left and right. The hydraulic system can accurately control the displacement vectors of the left die 2 and the right die 7. The left die 2 and the right die 7 move left and right along the fixed slideway without deviation. The left die 2 and the right die 7 can be combined with each other. When separated and combined, the left die 2 and the right die 7 are accurately butted.

The beneficial effects of the utility model:

(1) The mold described in the utility model adopts the bottom injection type extrusion to form the shaft sleeve parts. During the extrusion process, the semi-solid slurry is extruded from bottom to top, which solves the problem of the gravity of the semi-solid slurry during extrusion casting. The problem of liquid-solid separation caused by the impact, at the same time, the filling is stable and the structure of the formed parts is uniform.

(2) The mold described in this utility model uses the left hydraulic control system and the right hydraulic control system to control the opening and closing of the left and right concave dies. On the one hand, during the extrusion process, the semi-solid slurry is subjected to three-way force , so that the filling is more complete, and at the same time, it solves the problem of solid-liquid two-phase segregation during the forming process; on the other hand, after the extrusion is completed, the mechanical control of the demoulding is simple and convenient, and solves the difficult problem of traditional extrusion casting. , which has certain guiding significance for squeeze casting small bushing parts.

(3) The left hydraulic control system and the right hydraulic control system in the mold described in the utility model control the movement of the left die and the right die on the fixed slideway without deviation, which can realize precise docking and improve the forming of shaft sleeve parts. Accuracy is also important for protecting molds and improving product quality.

(4) The mold of the utility model is suitable for a variety of metal semi-solid slurries, the forming temperature is low, the extrusion force required for forming is small, the service life of the mold is improved, and the formed parts have uniform structure and good performance.

(5) The mold described in the utility model has reasonable structure, simple and convenient operation, can realize mechanized control, reduces labor cost, can realize continuous production, saves cost and improves efficiency.

(6) The shaft sleeve parts obtained by the extrusion molding of the mold described in the utility model are nearly finalized, do not need too much post-processing machining, the production efficiency and material utilization rate are greatly improved, the process is short, and it is suitable for mass production , has a certain guiding significance for saving resources and protecting the environment.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the three-dimensional structure of the left half of the forming die described in the present invention.

Fig. 3 is a schematic diagram of the structure of the forming sleeve part of the utility model.

In Figure 1: 1-upper die; 2-left die; 3-left hydraulic control system; 4-shaft sleeve parts; 5-lower die; 6-feed rod; 7-right die; 8-right hydraulic control system.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the utility model is not limited to the content described.

Mold upper die 1, left die 2, lower die 5, feeding rod 6 and right die 7 in the utility model embodiment 1~2 are made of H13 die steel and processed through heat treatment.

Example 1

The forming die of a semi-solid squeeze casting bushing part described in this embodiment, as shown in Figure 1, includes an upper die 1, a left die 2, a left hydraulic control system 3, a lower die 5, a feed rod 6, a right Die 7, right hydraulic control system 8; upper die 1 is connected to the top of the hydraulic press, and the hydraulic press controls the upper die 1 to move up and down; the diameter of the pressure head of the upper die 1 corresponds to the inner diameter of the middle hole of the sleeve part 4, and the length of the pressure head corresponds to the shaft sleeve part 4 Height; the left die 2 is connected with the left hydraulic control system 3, the right die 7 is connected with the right hydraulic control system 8, there is a cavity in the middle of the lower die 5, the diameter of the cavity corresponds to the flange diameter of the sleeve part 4, and the feed rod 6 The bottom end is connected with the hydraulic press, and the hydraulic press controls the feeding rod 6 to move up and down. The diameter of the feeding rod 6 corresponds to the inner diameter of the cavity of the lower die 5, and the feeding rod 6 and the lower die 5 are in clearance fit; the upper die 1, the left die 2, and the right die 7 The cavity formed after mold closing is in a straight line with the cavity of lower mold 5, and the cavity formed after mold closing of upper mold 1, left concave mold 2, and right concave mold 7 corresponds to the shape of shaft sleeve part 4, as shown in the figure 1~3 shown.

The upper die 1 described in this embodiment is fixed on the top of the hydraulic press through a T-shaped plate, and the lower die 5 is fixed on the working table at the bottom of the hydraulic press through a T-shaped plate.

Ceramic heating coils are provided on the outer surfaces of the upper die 1, the left die 2, the lower die 5, the feeding rod 6 and the right die 7 described in this embodiment.

H13 die steel is selected as the die material of the upper die 1, the left die 2, the lower die 5, the feeding rod 6 and the right die 7 described in this embodiment.

Example 2

The structure of the forming mold of the semi-solid squeeze casting bushing parts described in this embodiment is the same as that of Embodiment 1, the difference is that a fixed slideway is provided under the left die 2 and the right die 7, and the design of the fixed slideway, Make the left die 2 and the right die 7 not shift when moving left and right, the left die 2 and the right die 7 can be merged and separated, when merging, the left die 2 and the right die 7 are accurate butt.

The forming die of the semi-solid squeeze casting bushing part described in this embodiment will be further described in detail below in conjunction with the specific use process.

The use process of the mold described in the utility model: before squeezing and casting the bushing parts, the hydraulic machine controls the feed rod 6 to retreat to the bottom but not beyond the bottom position of the lower die 5, and the cavity space formed by the feed rod 6 and the lower die 5 Enough to place the semi-solid slurry required for forming parts, the left hydraulic control system 3 and the right hydraulic control system 8 control the separation of the left die 2 and the right die 7, and at the same time, the hydraulic press controls the upper die 1 to retreat to the top of the hydraulic press; Before die-casting the shaft sleeve parts, preheat the mold as a whole, the preheating temperature is 350~400°C, and at the same time, spray the inner surface of the upper mold 1, the left concave mold 2, the lower mold 5, the feeding rod 6 and the right concave mold 7 Graphite release agent; pour the heated and heat-preserved semi-solid slurry into the cavity of the lower mold 5 quantitatively, and then the left hydraulic control system 3 and the right hydraulic control system 8 control the left die 2 and the right die 7 to close the mold, and the hydraulic press controls The upper die 1 moves downward until the bottom of the upper die 1 is in close contact with the tops of the left die 2 and the right die 7; then, the hydraulic press controls the feed rod 6 to move upward, and the feed rod 6 drives the semi-solid slurry to move upward, and the semi-solid slurry The solid slurry is squeezed into the cavity formed by the left die 2, the right die 7 and the upper die 1 until the slurry fills the cavity, and the sleeve parts are extruded; finally, the hydraulic press controls the upper die 1 to return to the top of the hydraulic press , and then, the left hydraulic control system 3 and the right hydraulic control system 8 control the separation of the left die 2 and the right die 7 to complete the demoulding process; the entire extrusion casting process is simple to operate, realizes mechanized control, and can be continuously produced. The production efficiency is greatly improved, and at the same time, the extruded shaft sleeve parts have uniform structure and good performance.

Claims (5)

1. A forming die for semi-solid squeeze casting bushing parts, characterized in that it includes an upper die (1), a left die (2), a left hydraulic control system (3), a lower die (5), and a feeding rod (6), right die (7), right hydraulic control system (8); the upper die (1) is connected to the top of the hydraulic press, and the hydraulic press controls the upper die (1) to move up and down; the diameter of the pressure head of the upper die (1) corresponds to the shaft The inner diameter of the middle hole of the sleeve part (4), the length of the pressure head corresponds to the height of the sleeve part (4); the left die (2) is connected with the left hydraulic control system (3), the right die (7) is connected with the right hydraulic control system (8) ) connection, there is a cavity in the middle of the lower mold (5), the cavity diameter corresponds to the flange diameter of the sleeve part (4), the bottom end of the feed rod (6) is connected to the hydraulic press, and the hydraulic press controls the feed rod (6) to move up and down, The diameter of the feeding rod (6) corresponds to the inner diameter of the cavity of the lower die (5), and the feeding rod (6) and the lower die (5) are in clearance fit; the upper die (1), the left die (2), and the right die (7) The cavity formed after mold closing and the cavity of the lower mold (5) are in a straight line, and the cavity and bushing parts formed after the upper mold (1), left concave mold (2) and right concave mold (7) are closed (4) Corresponding shapes. 2. According to claim 1, the forming mold of the semi-solid squeeze casting bushing parts is characterized in that: the upper mold (1) is fixed on the top position of the hydraulic press through a T-shaped plate, and the lower mold (5) is fixed on the top of the hydraulic press through a T-shaped plate. The position of the working table at the bottom of the hydraulic press. 3. According to claim 1, the forming mold of the semi-solid squeeze casting bushing part is characterized in that: the upper mold (1), the left die (2), the lower mold (5), the feeding rod (6) and the right The outside of the die (7) is provided with a ceramic heating coil. 4. According to claim 1, the forming mold of semi-solid squeeze casting bushing parts is characterized in that: the upper mold (1), the left die (2), the lower mold (5), the feeding rod (6) and the right The die material of die (7) is H13 die steel. 5. The forming die for the semi-solid extrusion casting bushing parts according to claim 1, characterized in that: fixed slideways are provided under the left die (2) and the right die (7).