JPH0196394A - Bearing slider and its production - Google Patents

Abstract

PURPOSE:To produce the title high-precision bearing slider by applying black chromium plating over the whole surface of the formed bearing block body of specified shape, and grinding the mounting reference surface and load transmitting surface. CONSTITUTION:A hardenable steel such as SCM 415 is drawn and cut to specified size, and the profiles of the mounting surfaces such as the load transmitting surface 4 and the inner surface of a sleeve part 3 and the upper surface of a horizontal part 2 are roughly machined. A no-load ball circulating hole 5, tapped holes 6a and 6b, and the mounting hole 7 are bored, and necessary threading and broaching are carried out to form the bearing block body. The block body is hardened, and plated with black chromium to form a black chromium plating layer. One side of the upper surface and one side of the horizontal part 2 are ground to obtain mounting reference surfaces 2a and 2b, the load transmitting surface 4 is further ground based on the mounting reference surfaces 2a and 2b, and a high-precision slider 1 is fabricated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bearing sliding table and its manufacturing method, and particularly relates to a bearing having a black L1 plated surface and excellent rust prevention properties. This article relates to a sliding table and its manufacturing method.

[Prior Art] In recent years, linear motion bearings have been frequently used as means for linearly guiding a movable body to be moved in sliding parts of machine tools such as NC machines and industrial robots.

Such a linear motion bearing has rolling grooves 9 along its longitudinal direction, as shown in FIGS. 5 and 6, for example. /L Comprised of a road rail 8 and an I learning platform 1 that makes a linear reciprocating motion along the track rail 8 via rolling elements 10 such as balls and rollers rolling in the rolling groove 9, For example, the track rail 8 is attached to the fixed side of a mechanical device (not shown), and the swing table 1 is attached to the movable body side of the mechanical device (not shown), so that the movable body is linearly guided.
A load rolling surface 4, a rolling element 10, and a track rail 8, on which the rolling elements 10 roll while loading the cart, are formed on the sliding table 1.
Lubricating oil is constantly supplied between the rolling grooves 9 to ensure smooth single-seize movement.

In particular, regarding the sliding table 1, it is necessary to install a rolling element retainer 11, a side cover 12, etc. to prevent the rolling elements 10 from falling off when the sliding table 1 is separated from the track rail 8. Moreover, since it is necessary to form circulation grooves, circulation holes 5, etc. for infinite movement of the rolling element 10, broach machining, screw machining, etc. are required, and the accuracy of these machinings depends on the linear guide of the movable body. In order to have a significant effect on the lees, it is formed by processing hardenable steel, and the surface treatment of the formed product is not limited to 1. The current situation is to prevent rust on the surface. .

[Problems to be Solved by the Invention] For this reason, conventionally, 1lffJ crushed oil is supplied to the load rolling surface where the rolling elements roll on the sliding table, the circulation groove, or the circulation hole. However, rust does not often occur on the front and sides of the exercise stand where such lubricating oil is not supplied, and this rust can cause contamination inside the mechanical equipment. In addition, when product bearings are released (1), they must be coated with anti-rust oil and then wrapped in oiled paper impregnated with anti-rust oil, making packaging for shipping extremely troublesome. Ta.

In particular, with the recent development of office automation equipment, this type of bearing has come to be used as a mechanical component.
If lubricating oil is used for rust prevention purposes in such cases, dust may adhere to the surface of the bearing sliding table during long-term use, and this may contaminate the paper used in the 0Ala machine. was there.

The present invention was devised in view of this point of view, and its purpose is to prevent rust on the front and side surfaces of bearing slides where lubricant is not supplied during use. An object of the present invention is to provide an occupancy table that can be reliably achieved without using it, and a method for manufacturing the same.

[Means for Solving the Problems] That is, the first invention has a plating layer formed by black chrome plating on all surfaces except at least the outer mounting reference surface and/or the load rolling surface. The second invention is a bearing sliding table provided with a bearing sliding table, and the second invention is a hardenable steel material with rough machining such as its outer shape, machining (1), 4 quasi-shape, etc., load rolling surface, A bearing block body is formed by blowing the circulation grooves or circulation holes for unloaded rolling element circulation, mounting holes, etc., and threading the necessary mounting holes.Then, this bearing block body is hardened, and the above-mentioned mounting brackets are formed. Before the grinding of the reference surface and/or load rolling surface, or after this grinding, black plating is applied to at least all surfaces other than the outer mounting reference surface and/or the load rolling surface. This is a tW-inclusive method for bearing slides in which a plating layer is formed on the bearing.

In the present invention, the sliding table (for example, 30M as A trade)
A hardenable steel side such as 415 or 555C is used, and is usually first formed by means such as drawing (rough cross-sectional shape is formed, then cut to predetermined dimensions 111, and then a conventional swinging table is used. Machining applied during manufacturing, such as rough machining of the external shape and mounting reference surface, load rolling surface, circulation grooves or circulation holes for unloaded rolling element circulation, mounting holes, etc. A bearing block body is formed by machining and threading the required mounting holes, and then hardening is performed on this bearing block body.

For the bearing block body that has been hardened in this way, a plating layer is formed on the entire outer surface by black chrome plating treatment, and then grinding is performed, so that the mounting surface and σ/or load Either form a sliding table with a raceway surface, or grind the mounting reference surface and/or the load rolling surface and then apply black chrome plating to the mounting reference surface and/or the load rolling surface. t including running surface
'fA A sliding table having a surface coating layer is formed on the entire surface of the sliding table.

The former method is best when extremely precise high-precision machining is required for the mounting reference surface and/or load rolling surface, and the latter method is preferred when particularly excellent rust prevention effects are required. The method is preferred.

The black chromium plating treatment may be performed by any conventionally known method, but preferably includes (1) a degreasing process using trichloroethane, (2) a process for attaching a hook with an auxiliary anode to a jig, ■ Reverse electrolysis step (anodization step) performed by immersing the plate in a plating bath and applying a reverse voltage; ■ plating layer [culm] performed by applying a positive voltage in the plating bath; During this process, the second step is to attach the jig (in step 1, it is best to modify the shape of the anode and auxiliary anode so that the black chrome plating can be applied almost evenly to the lKi Sendai surface. , and the reverse voltage vR-T
If it is over-polished, free carbon will be generated and the density of the plating layer will be lost.
It is best to carry out the plating process under the conditions of 2 and 15 to 30 seconds.
-36, BC-37, BC-381>, bath Wu
'tl 15~30℃, current density 10~100A/d...
2 and energization +1. It is best to do this in 3 to 20 minute increments.

[Function] According to the present invention, a black chrome plating layer that adheres closely to the front and side surfaces of the sliding table of the bearing, where lubricating oil is not normally supplied, and has an excellent rust prevention effect is formed, thereby preventing rust. This can be prevented, and it is only necessary to apply lubricating oil to the load rolling surfaces of the rolling elements, circulation grooves, or circulation holes that should be supplied with lubricating oil, and rust-proofing treatment and packaging when shipping product bearings are extremely effective. becomes easier.

[Examples] The present invention will be specifically described below based on examples shown in the accompanying drawings.

1 to 3, a bearing slide 1 according to an embodiment of the invention is shown.

This sliding table 1 has a horizontal portion 2 and two pairs of oil portions 3 hanging downward from both ends of the horizontal portion 2, and has a shape in which a concave portion opens downward. (, Each oil portion 3 of this sliding table 1 is formed with a pair of upper and lower arcuate load rolling surfaces 4 along the longitudinal direction of its inner surface, and corresponds to each of these load rolling surfaces 4. A no-load ball circulation hole 5 is provided in the position along the longitudinal direction.Roughly speaking, there are screws on both front and rear end surfaces of the 18-movement base 1 for attaching beneficial bodies (not shown) to these front and rear end surfaces. Sub-holes 6a and 6b are formed, and four mounting holes 7 are provided in the horizontal portion 2 on the front, rear, left and right sides for mounting the 18-motion table 1 on a table or the like.

In addition, this one training table 1 has a load rolling surface 4, and a horizontal part 2 on one side of the top surface and one side of the side surface, which serves as a reference for attaching this one training table 1 to a table or the like. A black chrome plating layer is formed on all surfaces except the reference surfaces 2a and 2b by black chrome plating.

As shown in FIG. 4, the manufacture of the 18-motion base 1 of this embodiment involves first handling hardenable steel materials such as 80M415 and 355C, cutting them to predetermined dimensions, and then After rough machining of the external shape of the load rolling surface 4 on the inner surface of the part 3, the take-up surface 1 on the upper surface of the horizontal part 2, etc., the blank 4jj ball circulation hole 5 is formed.
, drilling of the screw holes 6a, 6b and the mounting hole 7 [pudding 1: and necessary screw threading 2] and 1 day - drilling [[] to form a bearing block body, and then the bearing block body is After hardening the surface and further black chrome plating to form a black chrome plating layer on the entire surface of the module, install it on one side of the top surface and one side of the horizontal section 2. j
'+' = 1 (ii 2 a, 2b grinding,
A highly accurate F moving base 1 is manufactured by further grinding the load rolling surface 4 based on these mounting reference surfaces 2a and 2b.

To form a black chrome plating layer using the above black chrome plating process, first, the hardened bearing block body is immersed in trichloroethane to sufficiently remove oil adhering to the surface, then dried, and then auxiliary plating is applied. Attach the hook with 4 to the jig and apply black chrome plating solution (product name: M&T Chrome BC-35, BC-36 manufactured by Japan M&T@).
, BC-37, BC-38, etc.), and first, a reverse voltage was applied at room temperature under conditions of a current density of 30 A/dm2 and 20 seconds to perform a reverse electric current W (processing). The surface of the bearing block body is subjected to so-called etching treatment, and then the bath temperature is 25℃ and the current density is 50A.
/dm2 and conduction time of 10 minutes with a positive voltage applied to the strip '1' to blacken the surface.

In this embodiment, when manufacturing the 18-movement base 1, after performing black chrome plating treatment, 1 standard parts 2a and 2b are used.
The mounting reference surfaces 2a, 2b and the load raceway surface 4 are rust-prevented by means such as applying lubricating oil or anti-corrosion oil. However, as shown by the broken line in Figure 4, when extremely high corrosion resistance is required, grinding of the reference surface [and grinding of the load rolling surface] is required. Grinding - [-
After that, a black chrome plating layer may be formed by applying blackening treatment to the entire surface of IS1S2O.

[Effects of the Invention] According to the present invention, bearings! Since the front and sides of the turntable are covered with a black chrome plating layer, rust can be reliably prevented even when no lubricating oil is supplied during use, making it possible to prevent mechanical equipment using this bearing. The inside of the bearing is no longer contaminated with rust, and the application of F11 lubricating oil or anti-corrosion oil when shipping product bearings is only required to a minimum, and it is extremely easy to immediately pack the bearings with anti-rust treatment before shipping. Become.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a rotary table according to an embodiment of the present invention;
Fig. 2 is a side view of Fig. 1, Fig. 3 is a sectional view taken along the line ■-■ of Fig. 1, Fig. 4 is a flowchart showing the procedure for manufacturing the sliding table of the above embodiment, and Fig. 5. 6 is a partially cutaway side view of FIG. 5; FIG. 6 is a partially cutaway side view of FIG. 5; FIG. Explanation of symbols (1)...Sliding table, (2a) (2b)...Tori-i'-standing surface, (4)...Loaded rolling surface, (5)...No-load ball circulation Hole, (7)...Mounting hole. Special accommodation applicant Hiroshi Teramachi

Claims (1)

[Scope of Claims] (1) A bearing characterized in that a plating layer formed by black chrome plating is provided on at least all surfaces other than the outer mounting reference surface and/or the load rolling surface. Sliding table for use. (2) For a bearing according to claim 1, which has a mounting reference surface and/or a load rolling surface without a plating layer, which is obtained by forming a plating layer on the entire outer surface by black chrome plating and then grinding it. Sliding table. (3) After grinding the mounting reference surface and/or the load rolling surface, the mounting reference surface and/or the load rolling surface are subjected to black chrome plating treatment, and a plating layer is formed on the entire outer surface including the mounting reference surface and/or the load rolling surface. Sliding platform for bearings as described in section. (4) Rough machining of the outer shape and mounting reference surface of hardenable steel materials, broaching of loaded raceway surfaces, circulation grooves or holes for unloaded rolling element circulation, mounting holes, etc., and necessary mounting holes. A bearing block body is formed by threading the bearing block body, and then this bearing block body is hardened and subjected to black chrome plating treatment prior to or after the grinding process of the mounting reference surface and/or load rolling surface. A method for manufacturing a bearing slide, comprising: forming a plating layer on all surfaces except at least the outer mounting reference surface and/or the load rolling surface. (5) The sliding base for a bearing according to claim 1, wherein the mounting reference surface and/or the load rolling surface are ground after forming a plating layer by black chrome plating. (6) The bearing sliding table according to claim 1, wherein the mounting reference surface and/or the load rolling surface are subjected to black chrome plating after grinding.