JPH02266112A - Guide rail for linear guide device - Google Patents

Abstract

PURPOSE:To prevent dents from being made and eliminate disadvantage in installation by quench hardening part of opposing pair of side surfaces excluding opposing pair of side surface to serve as sliding surfaces. CONSTITUTION:Right and left side surfaces 1a, 1b of a guide rail 1 as sliding surfaces of a guide rail 1 are quench hardened. Furthermore, upper and lower surfaces 1c, 1d excluding the areas around the positions where through holes 3a, 3d in the direction transversing the guide rail 1 are to be drilled are quench treated. As a result, the number of dents is reduced as practicably as possible, disadvantage in installation is eliminated, sealing section of a slider is prevented rom being damaged, and machining of holes is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application in Industry-1) The present invention relates to a guide rail for a linear guide device used as a component of an industrial machine such as a robot.

(Prior Art) Conventionally, this type of guide rail has been described, for example, in a catalog published by the applicant of the present application (Linear Guide for Industrial Machines (High Load Capacity 7+) Type 1, 11 Series): 1f Published in October 1888) has been done. This guide rail has a long prismatic shape, and is arranged in a row (1
A ball transfer raceway groove is formed on the 111 surface along the length direction of the rail, and a 1
); A ball transfer raceway groove is formed on the slider j, and a transfer path consisting of both ball transfer raceway grooves and the slider are 1)
A large number of holes are formed in the endless circulation path consisting of a ball return perforation hole penetrating in the length direction of the rail and a 1-11 arc-shaped ball path provided in the end cap fixed to the end face of the slider. are arranged.

Both side surfaces of the guide rail where the ball transfer raceway grooves are formed are hardened by quenching.

In this case, a through hole for a dowel bolt that passes through the guide rail in the transverse direction is formed on the remaining pair of opposing side surfaces (usually arranged as the upper surface), excluding both quench-hardened side surfaces. One side (top surface) is always exposed before the through-hole is formed, and the other side (bottom surface) is often used so as to be in direct contact with the digit 1.

(Problems to be Solved by the Invention) However, according to the conventional guide rail, both sides where the ball transfer track groove is formed are hardened, but the guide rail is not formed on both sides of the pond; While the through holes for inserting the bolts for 1 are added, the 111 gigantic deformation caused by heat treatment of long rails can be corrected by pressing. Therefore, it is necessary to prevent the top and bottom surfaces of the guide rail from being hardened. In other words, from the perspective of machining 1, it is desirable to drill through holes for J bolts on the guide rail before hardening. When hardened, the mechanical strength of the through hole portion becomes weaker, and when the bending is straightened, double bending occurs, making it impossible to make a straight guide rail. On the other hand, if the side surface where the through hole is formed (-1-lower surface) is not hardened and machined to form the through hole after completing the 1110 straightening, the surface where the through hole will be formed ( Because the hardness of the top and bottom surfaces of the guide rail is low, it is difficult to use, for example, for assembling the rail or for parts that have not been hardened;] Holes for bolts can be easily machined; The hardened parts, excluding the hardened parts, have a higher hardness and are less likely to be dented.

(Example) As shown in FIG. 1, a guide rail 1 according to an example of the present invention has a prismatic shape as a whole. -1-[-Phantom ball transfer track grooves 2a, 2b and 2c, 2(+) along the rail length direction are formed on both the left and right side surfaces 1a, 1() as moving parts, respectively. -Jz lower lower side surface 1c1 (1 is hardened and bent in the direction crossing the guide rail 1 as described later), and then the through holes 3a, 3b, 3C13 (1 are spaced apart) 11 times are worn.

For example, induction hardening is used for the hardening, and the left and right pair of high frequency coils 4a, 4b and the lower pair of high frequency coils 4<:, /lc3 is n;
1) and -1-F are arranged so as to face each other on both sides 1c and 1d. Here, the high frequency coil /Ia, 41) is likely to be scratched or scratched (so-called J'J marks) by the first quenching control section 5a when the high frequency coil is assembled or transported. If such dents are formed on the bottom surface of the guide rail, it will cause a deterioration of the accuracy between the guide rail and the seal part of the slider. It causes

The present invention has been made in order to solve the problems of the prior art. 1<<
It is an object of the present invention to provide a guide rail which eliminates the problems of the slider and prevents damage to the seal portion of the slider.

(Step -r for Solving the Problems) In order to achieve the purpose of the present invention, a pair of opposing side surfaces are used as sliding surfaces that are held on a slider, and the pair of side surfaces are hardened by a lamp. This guide rail for a linear kite device is characterized in that the pair of side surfaces of the pond except for the side surfaces in column n; J are partially quenched and hardened.

(Function) Both side surfaces along the length direction of the rail are hardened, and the remaining both side surfaces are hardened by I'il1. This is 4c
, 4d are respectively controlled by the second hardening control section 5L+. The quenching device consists of a driving section for moving the guide rail 1 in the rail length direction, an energizing section for energizing the high-frequency coil during quenching, and a water discharging section for supplying cooling water [9]. , its immediate action, energization, and water discharge are performed automatically according to a predetermined program.

Next, one order of C insertion will be explained.

Both left and right sides 1a and 1b are to be hardened on their entire surface.
While the guide rail 1 is moved by the control section, a tllll fall is performed by the first hardening control section 5a so that the high frequency coils 4a, 4+) are energized. −
・For both the upper and lower sides lc and Id, energizing the high frequency coil A<:, A(1)
31), :3 c , :3 +,] except for the vicinity of the planned drilling site. High frequency coil (4F!
, /11).

4c and 4d), the guide rail is heated, moves in the axial direction in the heated state, and is rapidly cooled by cooling water from the water discharge lTl1 to perform hardening. In other words, the hardening of the -1-downhill side IC 11d by the second hardening control section 51 is performed intermittently.

It is recommended to insert the force "C" before drilling it.
1. This is because double bending occurs at ',

When the hardening of the guide rail is completed, the necessary f′
Ij 111 in the opposite direction to the bend caused by using a straightening machine such as a press according to 1 degree! It is deformed slightly beyond the P11 limit, and while inspecting for bending using an inspection device such as an electric micrometer or a dial gauge, it is corrected by 1110 degrees so that a predetermined straightness is obtained. Next, the through holes 3a, 31), 30.3() are sequentially drilled using an old drilling machine such as a NO machining center or a drilling machine.In this case, the through holes 3a, 31), 3C
13 (The vicinity of the drilling site in 1 is not hardened,
Since it is not hardened, drilling can be easily performed.

In this embodiment, the hardening process is performed by induction hardening, and l- indicates the soil surface and bottom surface of the guide rail Lli Jr.
)/ (= Quenched except for the part of the I-bolt through-hole, but the rider is moistened) A nipple 8 is provided for the fluid.

As a supplementary note, in the figure, the glue C insertion areas on both left and right sides 1a, + 1) are indicated by light dots α and β, and -1-downhill side (
13.1 The quenched area on the upper surface 10 (only the upper surface 10 is shown) is light point C.
It is indicated by ■ζ.

(Effects of the Invention) As described above, according to the present invention, a pair of opposing side surfaces are used as vibration surfaces that engage with the slider, and the pair of side surfaces are applied with force.
In the guide rail for a linear guide device that has been hardened by zero people, the pair of side surfaces of the pond except for the pair of side surfaces are partially quenched and hardened, so that the parts excluding the parts that do not require curdling are R111, which performs quenching of chisels,]
” The formation of marks is reduced as much as possible, eliminating the problem of Inquiry-1, and the seal part of the slider is
On the one hand, there is no risk of overturning +, and on the other hand, drilling holes is a mechanical addition to Kadokasa.
We present a guide rail that is extremely useful for linear guide devices, leaving room for easy implementation of the following steps when necessary.
I can do J1.

[Brief explanation of drawings]

For example, the hardening may be performed by heating by scanning with a laser beam. 2 and 3 show a state in which the slider 5 is engaged with the guide lathe H which has been hardened in the above-mentioned manner. 1b
Pole transfer raceway grooves 28, 21) and 2C formed in
12 (] and the 11 L through grooves 2a, 2b, 2c, 2d
An endless circulation path is defined as a transfer path consisting of a ball transfer track 71.7 (not shown) formed on the slider 6 side so as to face each other, and a ball return perforation hole passing through the slider 6 in the rail length direction. A large number of rolling balls are interposed, so that the slider 6 slides along the rail length direction of the guide rail 1 in an internally cooled manner. In this case, the slider 6 is provided with a rubber seal 7 that contacts the guide rail 6, but the left and right side surfaces 11) are fully hardened, and there are 4j marks on the descending side 10 and Icl. Chikara J
Therefore, there is no risk of damage to the rubber seal 7 even if the rubber seal 7 comes into contact with the side surface of the guide rail 1 when the slider 6 moves. In addition, FIG. 1 is a perspective view showing an embodiment of the guide 1 knoll according to the present invention, FIG. 2 is a perspective view showing a state in which the slider is engaged with the guide rail shown in FIG. 1, and FIG. 3 is a side view of the guide 1 knoll shown in FIG. 2, viewed from the end face in the length direction of the 1 knoll. 1. Guide rail, 1a, l 1) Left and right sides, Ic,
1d -1, bottom surface, 6... slider, α, β - hardened area, △, 13.1), 11',... hardened area.

Claims (1)

[Claims] 1. In a guide rail for a linear guide device in which a pair of opposing side surfaces are used as sliding surfaces to engage with a slider, and the pair of side surfaces are quench-hardened, the other pair of side surfaces excluding the pair of side surfaces are partially A guide rail for a linear guide device characterized by being quench-hardened.