CN-121972623-A - Heavy-duty large-aspect-ratio machine tool body casting and manufacturing method thereof

CN121972623ACN 121972623 ACN121972623 ACN 121972623ACN-121972623-A

Abstract

The invention discloses a heavy machine tool body casting with a large height-width ratio and a manufacturing method thereof, wherein a pit is used for modeling, vertical side faces are used as parting faces, guide rail faces and bases are arranged at two side positions, inclined side faces face downwards, a pouring system, a chiller component, a core support and the like are arranged in the manufacturing process of a sand mold, a side core is arranged on a sand core on the side where the bases are arranged, an air outlet rope is arranged in the sand core, the air outlet rope is led to the side core and is used for air outlet through the sand mold, a pouring gate and a plurality of compression risers are arranged on a cover box, the pouring gate is connected and communicated with the pouring system, and the compression risers are communicated with a casting cavity.

Inventors

Deng Guyu
YE WENHUA
ZHANG JIANZHI
LI PING
ZHAO ZHIYUAN
Wang Xiunong
YANG YANG
ZHANG KE
CAI JINLONG
MA YUKE
PAN MI
YANG HUA
FANG QI
GUO WENQING
XU YUJIA

Assignees

武汉武重铸锻有限公司

Dates

Publication Date: 20260505
Application Date: 20251230

Claims (10)

1. The utility model provides a heavy lathe foundry goods of big aspect ratio, its characterized in that includes the lathe bed main part, the below of lathe bed main part is equipped with the base, the upper end of lathe bed main part is the guide surface, the guide surface integration has integral guide rail and grating mount pad, one side of lathe bed main part along length direction is the oblique side, the opposite side is the vertical side, the lathe bed main part is equipped with the oil return groove structure along length direction's both sides face respectively, the oil return groove structure is close to the guide surface is arranged, the inside top of lathe bed main part is equipped with interior chamfer structure, the average width of lathe bed main part with the ratio of lathe bed main part's height does not exceed 1:2.
2. The heavy duty high aspect ratio machine tool bed casting of claim 1, wherein the overall height of the machine tool bed casting is not less than 1.5m.
3. The heavy-duty high aspect ratio machine tool body casting according to claim 1, wherein the body is divided into an upper section, a middle section and a lower section, windows are respectively arranged on the outer walls of the two ends of each section, criss-cross rib plates are respectively arranged at the intersection of each section, and a plurality of communicated cavities are separated from the interior of the body.
4. The heavy duty high aspect ratio machine tool bed casting of claim 1 wherein the bottom surface of the base is an assembly surface and wherein the base is provided with a screw wrap structure.
5. The heavy-duty high aspect ratio machine tool body casting of claim 1, wherein an inclined rib plate connected with the body is arranged below the oil return groove structure, and the inner chamfer structure and the oil return groove structure are arranged in the same height section.
6. The method for manufacturing the heavy-duty large-aspect-ratio machine tool body casting according to any one of claims 1 to 5, characterized by comprising the following steps: Manufacturing a modeling wood die according to the shape and the size of a machine tool body, and manufacturing a plurality of sand cores according to the internal structure of the machine tool body; Adopting pit modeling, taking the vertical side surface as a parting surface, manufacturing a sand mold and a cover box in the pit according to the modeling wood mold, wherein the guide rail surface and the base are arranged at two sides, and the inclined side surface faces downwards; setting a pouring system in the manufacturing process of the sand mold, setting a chill component when manufacturing the sand mold and the sand core, putting the sand core into the sand mold, setting a plurality of chaplets at a plurality of positions between the two, setting a side core head on the sand core close to the side where the base is positioned, setting an air outlet rope in the sand core, leading the air outlet rope to the side core head, and discharging air through the sand mold; The positions of the sand cores are adjusted, the cover boxes are covered to obtain casting cavities, pouring gates and a plurality of compression risers are arranged on the cover boxes, the pouring gates are connected and communicated with the pouring system, and the compression risers are communicated to the casting cavities; Smelting molten iron, pouring the molten iron into the casting cavity, and obtaining the machine tool body casting after solidification molding.
7. The method for manufacturing the heavy-duty large-height-width-ratio lathe bed casting according to claim 6, wherein the pouring system comprises a sprue arranged in the sand mold, the upper end of the sprue is connected with the gate, a cross runner is arranged below the sprue, the length of the cross runner is larger than the width of the casting cavity, the cross runner is arranged in the sand mold below the casting cavity, a plurality of first inner runners and a plurality of second inner runners are arranged on the cross runner, the first inner runners are communicated with the casting cavity from the position of the base, the second inner runners are communicated with the casting cavity from the position of an oil return groove structure on the side of the inclined side, the height of the second inner runners is larger than the height of the first inner runners, and the second inner runners are arranged close to the side of the sprue.
8. The method for manufacturing the heavy-duty large-height-to-width-ratio machine tool body casting according to claim 7, wherein the second inner pouring channel is of a bushing structure and comprises an outer fire-resistant pipe and an inner fire-resistant pipe, one end of the inner fire-resistant pipe is sleeved in the outer fire-resistant pipe, the other end of the inner fire-resistant pipe is connected to the casting cavity, the lower end of the outer fire-resistant pipe is connected with the transverse pouring channel, the length of an exposed part of the inner fire-resistant pipe from the outer fire-resistant pipe is the same as the length of the first inner pouring channel, and the inner diameter of the outer fire-resistant pipe is larger than the inner diameter of the first inner pouring channel.
9. The method for manufacturing the heavy-duty high aspect ratio machine tool body casting according to claim 6, wherein the chiller assembly comprises a plurality of first welding and hanging chills arranged in the sand mold, a plurality of second welding and hanging chills arranged in the sand core, and a third welding and hanging chiller arranged in the sand core, wherein the first welding and hanging chiller is arranged at the positions of the guide rail surface and the guide rail, the second welding and hanging chiller is arranged at the position of the assembly surface of the base, and the third welding and hanging chiller is arranged at the position of the inner chamfer structure.
10. The method for manufacturing the heavy-duty large-aspect-ratio machine tool body casting according to claim 6, wherein the compression riser is distributed at the positions of the oil return groove structure and the base, the compression riser is of a truncated cone-shaped structure with a small bottom and a large top, a riser neck is arranged below the compression riser, the inclination of the outer wall of the riser neck is larger than that of the outer wall of the compression riser, and a cylindrical channel is further arranged below the riser neck.

Description

Heavy-duty large-aspect-ratio machine tool body casting and manufacturing method thereof Technical Field The invention relates to the technical field of machine tool parts and casting, in particular to a heavy machine tool body casting with a large height-width ratio and a manufacturing method thereof. Background The machine tool body is one of important parts in the machine tool, and is generally provided with structures such as a guide rail surface, a guide rail and the like, and is used as a core supporting part, and is mainly used for bearing a processing part and a moving mechanism, so that the stability and the processing precision of the machine tool are concerned. Most beds are cast by casting to produce a blank of the bed casting and then machined to produce the desired bed product. For a small lathe bed, the casting process is relatively simple, the manufacturing difficulty is low, the precision is easy to control, and for a large lathe bed, the manufacturing difficulty is increased, in order to ensure the product quality of a lathe bed casting, the large lathe bed is designed to be a regular structure, the bottom surface is upwards used as a parting surface during casting, and the guide rail surface is downwards arranged, so that the quality of the guide rail surface can be ensured, however, for some non-regular or large-aspect-ratio lathe beds, the casting mode is not suitable, problems exist in modeling, core making, gas outlet, casting head design and chill arrangement, and the longer guide rail surface is easy to deform, and needs to be additionally controlled by taking measures. Disclosure of Invention The invention aims to solve the problems in the prior art and provides a heavy machine tool body casting with a large height-width ratio and a manufacturing method thereof. In order to achieve the above purpose, the invention adopts the following technical scheme: The utility model provides a heavy lathe foundry goods of big aspect ratio, includes the lathe bed main part, the below of lathe bed main part is equipped with the base, the upper end of lathe bed main part is the guide surface, the guide surface integration has integral guide rail and grating mount pad, one side of lathe bed main part along length direction is the oblique side, the opposite side is the vertical side, the lathe bed main part is equipped with the oil return groove structure along length direction's both sides face respectively, the oil return groove structure is close to the guide surface is arranged, the inside top of lathe bed main part is equipped with interior chamfer structure, the average width of lathe bed main part with the ratio of lathe bed main part's height does not exceed 1:2. Further, the overall height of the machine tool body casting is not less than 1.5m. Furthermore, the lathe bed main body is divided into an upper section, a middle section and a lower section, windows are respectively arranged on the outer walls of the two ends of each section, criss-cross rib plates are respectively arranged at the junction of each section, and a plurality of communicated cavities are separated from the inside of the lathe bed main body. Further, the bottom surface of base is the fitting surface, be equipped with spiral shell package structure on the base. Furthermore, an inclined rib plate connected with the lathe bed main body is arranged below the oil return groove structure, and the inner chamfer structure and the oil return groove structure are arranged in the same height section. A method for manufacturing a heavy-duty large-aspect-ratio machine tool body casting, comprising the following steps: Manufacturing a modeling wood die according to the shape and the size of a machine tool body, and manufacturing a plurality of sand cores according to the internal structure of the machine tool body; Adopting pit modeling, taking the vertical side surface as a parting surface, manufacturing a sand mold and a cover box in the pit according to the modeling wood mold, wherein the guide rail surface and the base are arranged at two sides, and the inclined side surface faces downwards; setting a pouring system in the manufacturing process of the sand mold, setting a chill component when manufacturing the sand mold and the sand core, putting the sand core into the sand mold, setting a plurality of chaplets at a plurality of positions between the two, setting a side core head on the sand core close to the side where the base is positioned, setting an air outlet rope in the sand core, leading the air outlet rope to the side core head, and discharging air through the sand mold; The positions of the sand cores are adjusted, the cover boxes are covered to obtain casting cavities, pouring gates and a plurality of compression risers are arranged on the cover boxes, the pouring gates are connected and communicated with the pouring system, and the compression risers are communicated to the casting cavities; Smelting molten iron, pou