JPS6218301B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a structure in which a bed, column, etc., having a guideway portion requiring precision in machinery, particularly machine tools, are made of concrete.

Prior art In recent years, cast iron, which has been the main material for structures, has reduced weight and weight.
Steel plate materials have been used to take advantage of their rigidity, but these iron materials have various drawbacks such as poor damping properties and high thermal conductivity, so concrete structures are being put into practical use to improve these problems. be. However, structures such as machine tools require a guideway part that requires precision, and the common method is to attach the guideway directly to the concrete structure, which requires a large amount of man-hours to achieve precision and is expensive. Ta. For this reason, a method of directly casting the guideway into concrete is also used, but with polyester resin concrete, which has good workability and productivity, the curing shrinkage rate is 0.5 in terms of linear shrinkage.
%, and if there are metal fittings or other embedded objects, shrinkage will be restricted and cracks will easily occur during shrinkage.
In addition, the degree of contraction differed depending on the shape and location even within the same part, and the accuracy was unstable. On the other hand, epoxy-based resin concrete has a very small curing shrinkage rate of less than 1/10 of polyester-based resin concrete, so there is no problem with shrinkage and the accuracy is stable, but it is less effective than the former in terms of workability, economy, and environment. It has the disadvantage of being inferior.

Purpose Therefore, the present invention aims to create a resin concrete structure that is accurately stable and inexpensive by combining resin concrete of different materials in order to make the most of the characteristics of resin concrete, which is excellent in terms of damping heat transfer coefficient. It is an attempt to provide the body.

Solution The first invention improves the productivity and productivity of the A block and other base parts, which are made by molding and solidifying the guideway and its support structure, which require precision, with epoxy resin concrete, which is stable in precision. It is made by joining and integrating both blocks of B block, which is made by molding and solidifying polyester resin concrete with good workability.

In the second invention, a guideway centering adjustment member is provided between both blocks, and after centering adjustment, both blocks are joined and integrated.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. The column of the illustrated vertical machining center is divided into parts that require precision and other parts that do not. A frame body 4 is constructed by assembling steel plates 3 in a lattice shape and accurately welding them on a jig so that there is no distortion. Mounting plates 5 and 6 are welded parallel to each other at a predetermined interval on one side of the frame body 4, and ingots are formed in parallel on the upper surface of each of the mounting plates 5 and 6, and hardening is performed if necessary. There is. Steel guideways 1 and 2 are fitted into the studs at the stud portions 1c and 2c, and are strongly fastened in the longitudinal direction by a plurality of bolts 7 and 8. The guideways 1 and 2 have a sliding surface 1a that comes into contact with the mating member,
1b; 2a and 2b are hardened by induction hardening and finished by grinding if necessary. Furthermore, rod pieces 9, 10, 11, and 12 having internal threads for jack bolts are welded to the opposite side of the frame body 4 from the mounting plates 5 and 6 so that their end surfaces are flush with each other.

The frame body 4 constructed in this manner is placed on a jig with the guideways 1 and 2 facing downward, and the four sides of the frame body 4 are surrounded by shape plates. Furthermore, in order to form holes 20 for pouring adhesive concrete later, tapered wooden rods are pulled out and erected at appropriate locations in the longitudinal direction. Next, the prepared epoxy resin concrete material is poured up to the end faces of the jack bolt rod pieces 9, 10, 11, and 12, and solidified and formed to form the A block that requires precision.

On the other hand, in order to manufacture a B block that does not require precision, a jig is set up on a surface plate and the rod pieces 9 and 1 of the A block are manufactured.
The jack bolts 13, 14, 15, and 16 are fixed horizontally so as to have a positional relationship corresponding to 0, 11, and 12. Next, the four circumferences are cylindrically surrounded by a B-block shaped frame, and the frame facing the erection jig is provided with recesses into which the rod pieces 9, 10, 11, and 12 are inserted, and furthermore, the recesses are Jyatsuki bolt 13,1
Drill holes for numbers 4, 15, and 16. In addition, a core frame for providing a cavity 21 that will become the core of the column in the center of the B block is placed upright on a surface plate, and the heads of jack bolts 13, 14, 15, and 16 are protruded from the inside of the core frame so that they can be tightened. . jack bolt 1
3, 14, 15, 16 are composed of rod pieces 9, 10, 1
A flange member in which the through hole for the bolt 17 that is screwed into the female threads 1 and 12 is on the core frame side, and the through hole for the bolt 17 is on the A block side, and a female thread that is screwed into the thick and short jacking bolt 18 is engraved. 19 is embedded in the B block, and a bolt 18 is interposed between it and the bar piece 9, and the A and B blocks are connected with a tightening bolt 17. A polyester resin concrete material is mixed and poured into this form and solidified to form the B block. If A block and B block are sufficiently dried and solidified, if guideways 1 and 2 of A block require mechanical finishing, use a surface grinder, etc. to machine them, then place guideways 1 and 2 on B block with the joint surface facing up. Place the A block on the upper side and screw the four jack bolts 1 into the flange member 19.
8 to center the guideways 1 and 2, and a tightening bolt 17 is inserted through the flange member 19 and screwed into the female threads of the rod pieces 9, 10, 11, and 12 to fix it. And gap 2 between A block and B block
Apply epoxy resin concrete material prepared to bond 2 to the entire gap 2 from gap 23 and hole 20.
Inject it all over 2 to join A block and B block. Since the adhesive is epoxy, there is little shrinkage and there is no need to adjust the centering.

Effects As detailed above, the present invention uses an epoxy resin concrete material with a low shrinkage rate for parts that require precision such as beds and columns, and glues other parts using a polyester resin concrete material to integrate them. Because the concrete material has a built-in reinforcing material and solidifies, it does not crack, and it is possible to obtain stable accuracy comparable to that when the entire concrete is made of epoxy. By taking advantage of these characteristics, it is possible to improve accuracy, workability, and productivity, and also to be economical and reduce costs. Furthermore, weight reduction can be achieved without impairing the high damping properties of concrete. 2 more
Since the centering can be adjusted by inserting a jack bolt between the block configurations, centering is extremely easy and the number of man-hours required for centering can be greatly reduced.Furthermore, even when machining the guideway part, it is possible to adjust the centering. Since the column is also divided, the block to be machined can be made small, and it has the feature that it does not require a large-scale processing machine like the conventional one.

[Brief explanation of the drawing]

FIG. 1 is a front view of the column of the embodiment, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is an enlarged explanatory view of the jack bolt. 1, 2...Guideway, 3...Reinforcement steel material, 4
... Reinforcement frame, 9, 10, 11, 12 ... Rod piece, 1
3, 14, 15, 16...Jatsuki bolt.

Claims (1)

[Scope of Claims] 1. An A block in which a guideway that requires precision and its accompanying support reinforcing material in the bed and columns of a machine is molded and solidified with epoxy resin concrete material, and A resin concrete structure characterized in that a bed and columns are constructed by integrally bonding the other parts with a B block formed and solidified with polyester resin concrete material using an adhesive. 2. Block A is made of epoxy resin concrete that is molded and solidified for the guideway that requires precision in the bed and columns of the machine, as well as the supporting and reinforcing material that accompanies it, and the other parts of the bed and columns are made of polyester. It consists of a B block molded and solidified with resin concrete material, and an adjustment member for centering the guideway provided between the A block and the B block, and after adjusting the centering of the guideway, the A block A resin concrete structure characterized in that a bed, columns, etc. are constructed by bonding and integrating the above-mentioned B block.