Spindle box die convenient to take

Abstract

The utility model discloses a spindle box die convenient to take. The spindle box die comprises a support (1), a bottom plate (2), a positioning plate (3) and a die body (4). The shape of the die body (4) is consistent with that of a spindle box, a spindle hole groove (5) is formed in the die body (4), a die taking ring (6) is placed in the spindle hole groove (5) and composed of two half ring sleeves which are oppositely opened, semi-cylindrical holes are formed in the inner walls (8) of the half ring sleeves in the vertical direction, and after the two half ring sleeves abut against each other, a cylindrical hole is formed in the interior of each half ring sleeve, and a circular-truncated-cone-shaped face is formed in the outer side face of each half ring sleeve. The size and the shape of the main shaft hole are formed by the mold taking ring (6), the mold taking ring (6) is in movable fit with the main shaft hole groove (5), during mold taking, the mold body (4) is taken out firstly, the mold taking ring (6) is combined with molding sand of a sand box, and then the mold taking ring (6) is taken out from the surface of the molding sand, so that the problem that the mold is difficult to take out at the part of the main shaft hole is well solved; and complete casting of a main shaft hole without inclination of a casting can be formed, so that the casting is more accurate in size and more attractive in appearance.

Description

Technical Field

[0001] The utility model relates to the technical field of sand casting, in particular to a clay sand line pouring device. Background Art

[0002] The headstock is an important component of various machine tools and is used to arrange the working spindle of the machine tool, its transmission parts and corresponding additional mechanisms; the headstock is a complex transmission component, including a spindle assembly, a reversing mechanism, a transmission mechanism, a braking device, an operating mechanism, a lubricating device, etc.; its main function is to support the spindle and make it rotate, realizing functions such as starting, braking, speed change and reversing of the spindle. As an important component of the machine tool, its quality and dimensional accuracy determine the working stability and machining accuracy of the machine tool. The headstock casting has a complex structure, a large difference in wall thickness, and high technical requirements. There are no casting defects such as sand inclusion, crack, shrinkage porosity and shrinkage cavity allowed inside the casting, especially in important parts such as shaft holes, jaws and guide rails. During casting, since the envelope surface of the molding sand and the mold are tightly bonded together, especially the envelope surface in the mold removal direction, the mold cannot be smoothly removed from the molding sand, and the molding sand can only be loosened by repeatedly knocking on the mold to remove the mold. In this way, the mold removal is very difficult, resulting in damage to the mold and inaccurate contour dimensions of the casting. Summary of the Invention

[0003] The utility model provides a headstock mold that is convenient for transportation and has a simple structure and is convenient for mold removal. Through the design of the mold removal ring, the final formed casting spindle hole has no slope, the mold removal ring has a long service life and high precision.

[0004] The utility model adopts the following technical scheme: A headstock mold convenient for mold removal, including a bracket 1, a bottom plate 2, a positioning plate 3 and a mold main body 4; the bracket 1 is a "well"-shaped bracket, which is convenient for hoisting and transportation; the bottom plate 2 is located on the bracket 1, the middle of the bottom plate 2 is a flat plate, and triangular convex blocks 201 are respectively arranged at the four corners of the flat plate; a positioning plate 3 is placed on the bottom plate 2, and the positioning plate 3 is located inside the triangular convex blocks 201 on the bottom plate 2.

[0005] The mold main body 4 is in the same shape as the headstock, and a spindle hole groove 5 is arranged thereon. A mold removal ring 6 is placed in the spindle hole groove 5. The upper plane of the mold removal ring 6 is in the same plane as the upper plane of the spindle hole groove 5. The mold removal ring 6 is composed of two split semi-ring sleeves, and the openings of the two semi-ring sleeves are abutted against each other to form an abutting portion 7. A semi-cylindrical hole is vertically opened on the inner wall 8 of the semi-ring sleeve, and the thickness between the outer circumferential wall 9 and the inner wall 8 of the semi-ring sleeve gradually decreases from top to bottom, so that the outer wall 9 inclines inwards by 3 degrees. After the two semi-ring sleeves are abutted, a cylindrical hole is formed inside, and a frustum-shaped surface is formed on the outer side.

[0006] The modulus-taking ring 6 is located in the main shaft hole groove 5, and a distance of 0.1 - 0.5 mm is left between the outer side wall of the modulus-taking ring 6 and the main shaft hole groove 5. The cylindrical hole of the modulus-taking ring 6 is filled with molding sand.

[0007] Preferably, the end face of the abutting portion 7 facing the other half-ring sleeve is parallel to the end face of the half-ring sleeve where it is located.

[0008] Beneficial effects: The utility model has the characteristics of simple and compact structure, simple operation and low manufacturing cost. The size and shape of the main shaft hole are formed by the modulus-taking ring 6. There is a movable fit between the modulus-taking ring 6 and the main shaft hole groove 5. When taking the mold, first take out the mold body 4, and the modulus-taking ring 6 is together with the molding sand in the sand box, and then take out the modulus-taking ring 6 from the surface of the molding sand. It well solves the problem of difficult mold-taking at the main shaft hole part, and can form a complete casting of the main shaft hole of the casting without taper, making the casting size more accurate and the appearance more beautiful. Description of the Drawings

[0009] Figure 1 It is a schematic structural diagram of the utility model.

[0010] Figure 2 It is a three-dimensional structural diagram of the modulus-taking ring of the utility model.

[0011] Figure 3 It is a schematic structural diagram of the half-ring sleeve of the modulus-taking ring of the utility model.

[0012] In the figure: support 1, bottom plate 2, triangular convex block 201, positioning plate 3, mold body 4, main shaft hole groove 5, modulus-taking ring 6, abutting portion 7, inner wall 8, outer wall 9. Detailed Embodiment

[0013] The following further describes the utility model with reference to the drawings and embodiments.

[0014] Embodiment 1: A main shaft box mold convenient for mold-taking, including a support 1, a bottom plate 2, a positioning plate 3 and a mold body 4; the support 1 is a "well"-shaped support, which is convenient for lifting and transporting; the bottom plate 2 is located on the support 1, the middle of the bottom plate 2 is a flat plate, and triangular convex blocks 201 are respectively arranged at the four corners of the flat plate; a positioning plate 3 is placed on the bottom plate 2, and the positioning plate 3 is located inside the triangular convex blocks 201 on the bottom plate 2.

[0015] The mold body 4 is identical in shape to the headstock, and is provided with a spindle hole groove 5. A mold removal ring 6 is placed in the spindle hole groove 5. The upper plane of the mold removal ring 6 is in the same plane as the upper plane of the spindle hole groove 5. The mold removal ring 6 is composed of two split half-ring sleeves, and the openings of the two half-ring sleeves are in contact with each other to form a contact part 7. The end face of the contact part 7 facing the other half-ring sleeve is parallel to the end face of the half-ring sleeve where it is located. A semi-cylindrical hole is vertically formed in the inner wall 8 of the half-ring sleeve, and the thickness between the outer circumferential wall 9 and the inner wall 8 of the half-ring sleeve gradually decreases from top to bottom, so that the outer wall 9 inclines inwards by 3 degrees. After the two half-ring sleeves are in contact, a cylindrical hole is formed inside, and a frustum-shaped surface is formed on the outer side. The mold removal ring 6 is located in the spindle hole groove 5, and a distance of 0.1 mm is left between the outer side wall of the mold removal ring 6 and the spindle hole groove 5. The cylindrical hole of the mold removal ring 6 is filled with molding sand.

[0016] During use, a spindle hole groove 5 is reserved at the position of the spindle hole on the mold body 4, and the mold removal ring 6 is installed in the spindle hole groove 5. When the resin sand filled in the mold body 4 hardens and is demolded, the mold removal ring 6 and the sand core formed by the resin sand are taken out together. When removing the sand core, the inward inclination angle of the outer wall 9 of the mold removal ring 6 ensures the smooth removal of the core. After removing the sand core, the two half-ring sleeve parts of the mold removal ring 6 ensure the smooth demolding of the mold removal ring 6. The two half-ring sleeves are taken out along both sides to form a sand core with a non-tapered spindle hole for the casting. The prepared core is placed on the positioning plate 3. After the sand cores are assembled in the mold and poured, finally, a headstock with a non-tapered spindle hole is formed through the sand core.

Claims

1. A spindle box mold that is convenient for taking molds, characterized by: The mold comprises a bracket (1), a base plate (2), a positioning plate (3) and a mold body (4); the bracket (1) is a "well"-shaped bracket, the base plate (2) is located on the bracket (1), the middle of the base plate (2) is a flat plate, and the four corners of the flat plate are respectively provided with triangular protrusions (201); a positioning plate (3) is placed on the base plate (2), and the positioning plate (3) is located on the inner circle of the triangular protrusions (201) on the base plate (2); The mold body (4) is consistent with the shape of the spindle box, and is provided with a spindle hole groove (5). A mold ring (6) is placed in the spindle hole groove (5). The upper plane of the mold ring (6) and the upper plane of the spindle hole groove (5) are in the same plane. The mold ring (6) is composed of two half-ring sleeves, and the openings of the two half-ring sleeves are mutually abutted to form an abutment portion (7). The inner wall (8) of the half-ring sleeve is vertically provided with a semi-cylindrical hole. The thickness between the circumferential outer wall (9) of the half-ring sleeve and the inner wall (8) is gradually reduced from top to bottom, so that the outer wall (9) is inclined inwardly by 3 degrees. After the two half-ring sleeves are abutted, a cylindrical hole is formed inside, and a truncated cone surface is formed on the outer side surface; the mold ring (6) is located in the spindle hole groove (5), and a distance of 0.1-0.5 mm is left between the outer wall of the mold ring (6) and the spindle hole groove (5).

2. The spindle box mold for convenient mold removal according to claim 1 is characterized in that: The end surface of the abutment portion (7) facing the other half-ring is parallel to the end surface of the half-ring where the abutment portion (7) is located.

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