JPH0938803A - Correcting method for slide surface of lathe, and working device for the correcting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply correct the abrasion of a guide surface, by grinding and correcting the other side guide surface with a guide surface, on which a headstock and a tail stock are placed, as a standard. SOLUTION: First guide surfaces 2a and 2b, on which a headstock and a tail stock are placed, are hardly abraded by 2-3 years by performing lathe working, in contrast to this, a portion of second guide surfaces 3a and 3b, from the nearly intermediate part between the headstock and the tail stock to near to the headstock frequent in a use frequency, is abraded so much to reach about 2-5μm by several years. Consequently, a carriage is inhibited from its linear movement on the surfaces 3a and 3b to affect working accuracy. Accordingly, the surfaces 3a and 3b are grinding-worked, with the unabraded surfaces 2a and 2b as a standard, to surely ensure parallelism with the surfaces 2a and 2b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding machine for a guide surface of a lathe for turning a machine having a cylindrical shape or an axisymmetric rotating body, which is particularly common in cutting machines.

[0002]

2. Description of the Related Art Generally, a lathe bed is driven by a motor, a spindle is provided in a headstock, and a chuck or a face plate for fixing a workpiece is attached to an end of the spindle. The tailstock is placed on the bed, facing the headstock. This headstock is fixed, and the tailstock may be moved according to the size of the workpiece, but in the middle there is a turret with a bite attached and a reciprocating pedestal that reciprocates the turret. It is attached to the upper guideway. Then, at the time of processing, the gear in the apron is rotated by the rotation of the feed rod from the feed conversion box connected to the drive mechanism of the main shaft, the gear is engaged with the rack provided on the side surface of the bed, and the carriage is moved in the front-back direction. Further, the lead screw is provided in parallel with the feed rod, and the carriage has a structure capable of moving in parallel.

By the way, in the lathe work, a cylindrical body or a rotating body whose outer periphery is symmetric with respect to the center axis of the workpiece is mainly rotated by rotating the center axis of the workpiece. Therefore, rather than machining the cutting tool in the front-rear direction, it is more likely that the carriage moves while moving parallel to the lead screw on the guide surface of the bed. For this reason, the two guide surfaces parallel to the lead screw and on the bed, that is, the first guide surface, have the headstock and the tailstock facing each other, while the second guide surface has the first guide surface. It is designed to be parallel to the guide surface and the lead screw and to move the carriage.

A detailed description will be given below with reference to the drawings. FIG. 5 is a perspective view of a general ordinary lathe, and FIG. 6 is a partial side view thereof, showing a headstock mounted on a bed. In FIG. 5, 31 is a lathe bed, 32 is a headstock, 33 is a tailstock, 34 is a carriage, and there is a tool rest 35 for mounting and fixing a bite or the like. Further, reference numeral 36 is a chuck for mounting a workpiece. This chuck also has various chucks, and the tailstock 3
In addition to the rotation center, 3 also has a steady rest to prevent shake due to rotation of the work. In addition, 37 is a lead screw, which is used for automatically running the carriage and for thread cutting. 3
Reference numeral 8 is a feed rod, and 39 is an apron, which is transmitted to a small gear in the apron by the rotation of the feed rod and meshes with a rack on the side of the bed to move the carriage back and forth. 40 is a foot switch for sudden stop.

Next, FIG. 6 is a partial side view of FIG. 5, in which 41 is a direction in which an operator operates a lathe, and 42 is a handle, which is a lever for switching the rotation speed of the chuck 36. Is. Further, 43 indicates a first guide surface, and 44 indicates a second guide surface. The headstock is in contact with the slide surface 45 on the first guide surface and the second guide surface side, but is not in contact with the second guide surface 44 and the slide surface 46 on the first guide surface side. It is in a floating state. This also applies to the tailstock. On the contrary, in the case of a carriage, the second guide surface 44 and the slide surface 46 on the first guide surface 43 side are in contact with each other.

[0006]

However, in the actual work of the lathe, the headstock is fixed to the first guide surface on the bed, and the tailstock is not always moved, so the bed is not always moved. The upper first guide surface is less likely to wear even after long-term use of a lathe. On the other hand, since the second guide surface moves the carriage to the left and right on the second guide surface each time the work piece is cut, if it is constantly operated, it will take about 2 to 3 years. There is also a problem in that the required accuracy cannot be obtained due to wear of up to 5 μm.

Therefore, in order to ensure the accuracy, the owner of the lathe returns it to its manufacturer and performs an overhaul each time. Therefore, the manufacturer first removes the headstock, tailstock, and base plate of the carriage 1 from the bed, and performs scraping work or grinding work on the first guide surface and the second guide surface. In this scraping work or grinding work, the guide surface is also a hardened surface and is hard, and scraping is almost impossible. In addition, in the grinding process, if the machined surface is not leveled accurately, not only can the parallelism between the first guide surface and the second guide surface be maintained, but also accuracy cannot be ensured.
There has been a problem that it takes a lot of man-hours, and further, the transportation cost for delivering the repaired and repaired product to the manufacturer is high.

[0008]

As a method for solving the above-mentioned problems, the present invention creates a dedicated grinder based on the first guide surface and grinds the second guide surface for abrasion. The linearity of the part is ensured.

Since the dedicated grinding machine of the present invention processes the second guide surface while traveling on the first guide surface with reference to the first guide surface, the second guide with respect to the first guide surface is processed. The parallelism of the surfaces can be reliably maintained.

[0010]

[Embodiment 1] An embodiment of the present invention will be described below with reference to FIGS.
This will be described below. FIG. 1 is a side view of the present invention, and FIG. 2A is a front view. Also, FIG. 2B shows the first guide surface and the second guide surface of the bed.
3 is a side view of the guide surface of FIG. In FIG. 1, 1 is a bed,
2a and 2b are first guide surfaces, and 2c is a slide surface, 3
Reference numerals a and 3b are second guide surfaces, 3c is a slide surface, θ ₁ is an angle of the first guide surface, and θ ₂ is an angle of the second guide surface. The arrow 4 indicates the front of the lathe, which is the position where the operator is normally located. 5 is the first guide surface 2a, 2b
Is a first reference block for mounting the roller shafts 7a, 7b corresponding to, 6a is mounted on the roller shaft 7a,
The roller is in contact with the first guide surface 2a. Well, 8a
Is an L-shaped angle for fixing the roller shaft 7a, and is fixed to the first reference plate 5 with a screw. Similarly, 6b is a roller that is attached to the roller shaft 7b and is in contact with the first guide surface 2b, and 8b is an L-shaped angle that fixes the roller shaft 7b, and is fixed to the first reference plate 5 with a screw. Further, 9 is a fixed plate fixed to the first reference plate 5.

Next, 10 is a grindstone for processing the slide surface 2c corresponding to the second guide surfaces 3a and 3b provided on the first guide surface side, and the grindstone shaft 11 is directly connected to the motor 15a or connected by a belt ( The holder 12 of the grindstone shaft 11 is fixed to the first reference block 5 with a screw. By adjusting the handle 13, the holder 12 can be finely adjusted up and down. I am trying. 1
Reference numeral 4 is a nut for preventing a predetermined cut from changing.

L is the apex (2a, 2b) of the first guide surface.
Of the lathe) and the apex of the second guide surface (the point of intersection of 3a and 3b), which has different values depending on the size of the lathe. Therefore, the dedicated grinding machine according to the present invention can be shared within a range up to the required L value. That is, 16 is the first reference block 5a.
And a left and right guide portion fixed to the fixed plate 9,
Is a movable part that can be expanded and contracted. Then, the handle is moved by 18 and the fixed plate 9 and the movable part are fixed by 19 nuts.

Next, reference numeral 5b is a second reference block, which is fixed to the movable portion 17 which can expand and contract. The second reference block 5b has grindstones 19a and 19b attached to the tip ends of the spindles 20a and 20b, the angle of which is θ ₂ , and the second guide surfaces 3a and 3b having 19a and 19b, respectively. Can handle and grind.
21a and 21b are belts, and 21a is 1
The drive from the motor 5c and the drive 21b from the motor 15b are transmitted to the grindstones 19a and 19b, respectively, and processed. In addition, the above-mentioned grindstones 10, 19
The grindstones a and 19b may be the same, and a cup-shaped grindstone is used. However, a flat grindstone may be used, and in this case, the holder 12 of the grindstone shaft and the spindles 20a and 20b are θ _2. It is feasible even though the structure changes a little because it has to be changed. Further, θ ₁ and θ ₂ are generally 90 degrees to 120 degrees although they differ depending on the design.

FIG. 2A is a front view and FIG. 2B is a rail on the bed. In FIGS. 1 and 2, 21a and 21b are configured to rotate the grindstones of 19b and 19a at a predetermined peripheral speed via a motor 15c and a belt of the motor 15c, respectively. In FIG. 2, the motor 15a rotates the grindstone 10. Next, 22 is a rotary roller attached to a shaft 23, which is a grindstone 19 for traveling while rotating on the intersection of the second guide surfaces 3a and 3b (that is, the tip of the crest).
This is for controlling the cut amount of a and 19b.
The shaft 23 can be adjusted up and down by a handle 24a, and the shaft 24b is fixed by a nut. Further, the grindstone 19b is designed to grind the second guide surface 3b side, and the grindstone 19a is grinded to the first guide surface side, and the rotary roller 22 is arranged at a substantially intermediate portion thereof.

The operation and operation will be specifically described below. By performing the lathe work, the first guide surface hardly wears in 2 to 3 years, while the second guide surface is close to the headstock from the approximately middle portion of the frequently used headstock and tailstock. A lot of parts are worn, and wears around 2 to 5 μm in several years. For this reason, the carriage cannot move linearly on the second guide surface, which affects the processing accuracy. For example,
When it is abraded by 5 μm, the lathe is a process centered on the center axis of the work piece, so an error of 10 μm occurs in the diameter and the desired shape cannot be obtained. Therefore, although it is overhauled, in the present invention, the second guide surface is machined with reference to the first guide surface which is not worn, so that the parallelism with the first guide surface is surely secured. . On the other hand, conventionally, it is usual to return the product to the manufacturer because of an overhaul. When overhauling, the manufacturer removes the headstock, tailstock, and carriage on the first and second guide surfaces on the bed and scrapes or grinds the first and second guide surfaces. However, in this method, only the working range of the carriage is parallel to the first guide surface, and if the accuracy is secured, the headstock and tailstock can be machined without removing them from the bed. The workability can also be improved. In addition, after the overhaul, the transportation cost to bring to the factory, the period during the overhaul, the operation of the equipment will be closed, and the processing by the dedicated grinding machine can reduce the transportation cost, shorten the vacation period, etc. The effect is great.

Next, the processing device, which is a dedicated grinding machine, is provided with a plurality of drive wheels for moving the guide surface on the first guide surface, and the drive wheels are provided on the left and right sides of the first guide surface. The width is wider than the width in which a plurality of motors, spindles, and grindstones that are arranged so as to cross over the second guide surface are machined, and are stably driven on the first guide surface. Is done. And a plurality of motors on the second guide surface,
The spindle and grindstone can be adjusted individually,
Adjust and fix this so that it evenly hits the left and right sides of the guide surface,
A cutting adjustment roller is provided at the apex portion of the guide surface, and grinding is performed until there is no part worn by the cutting adjustment roller.

Since the lathe has different distances between the first guide surface and the second guide surface depending on the size manufacturer,
Since the drive wheel on the first guide surface and the spindle on the second guide surface must be parallel or perpendicular to the inclined surfaces of the respective guide surfaces, the first reference block on the first guide surface. And the centers of the second reference blocks on the second guide surface must be parallel, so that the first reference block and the second reference block can be telescopically adjusted.

After the second guide surface is machined, the machining amount thereof, for example, Δh, is not cut and the worn portion disappears, and when a uniform ground surface is obtained, the sliding portion of the first guide surface is hX√2. It is only necessary to process it (however, when the left and right inclination angles of the second guide surface are 90 °).

[0019]

Example 2 Above

In the first embodiment, the accuracy of the lathe is ensured by grinding the second guide surface and the slide surface with the first guide surface as a reference, while the present invention is the first guide surface. Further, the second guide surface, that is, the fixed base is provided with reference to both ends of the two guide surfaces, and the fixed base is provided with the guide surfaces parallel to the two guide surfaces.

A description will be given below with reference to the drawings. FIG. 3 is a side view showing another embodiment, and FIG. 4 is a plan view thereof. FIG.
In the figure, 25 is the two guide surfaces 2a, 2b of the bed 1,
3a, 3b have fulcrum at 4 places which straddle both end surface parts, and have one guide surface 27a and 27b and slide surface 2 at the upper part.
One guide surface 27a, 27b having 7c is a fixed base parallel to the guide surfaces 2a, 2b, 3a, 3b of the bed 1.
A fixing plate 26 is fixed from the lower portion of the bed 1 by bolts, as in the case of fixing a tailstock, for example.
Further, 28a is a left and right moving plate at the upper part,
Reference numeral 8b is a notch adjusting base plate on the upper portion thereof. And between the left and right moving base plate 28a and the cutting adjustment base plate 28b,
The leaf spring 29 and the side surface thereof have a guide portion 28c for preventing lateral movement, and 30 is a micrometer for adjusting a cutting depth.

That is, the second reference block 5b, the grindstone shaft 11 and the motor 15c are fixed to the cutting adjustment base plate 28b with the cutting adjustment being "0".
(Note, the cutting adjustment mechanism is not shown because it uses a dovetail-shaped guide surface.) Then, the cutting adjustment handle 30 is used to make a minute cut, and the left and right moving base plate 28a is moved to move on the bed. The two guide surfaces can be processed.

This method is advantageous, for example, when the first guide surface on the bed is worn or when the surface accuracy of the first guide surface is not obtained due to unevenness due to dents. Yes, the accuracy can be ensured. further,
Since a plurality of grinding mechanisms are fixedly adjusted on the cutting adjustment base plate, it is possible to set the cutting amount while observing the cutting adjustment micrometer. Has the effect that it can always be machined to the same height, which means that a short work time is sufficient.

In addition to the guide surface having the shape shown in the figure, the guide surface for imparting a linear motion has several shapes such as an inverted V-shaped guide surface and a rectangular guide surface.
It goes without saying that the present invention only needs to develop a dedicated grinder so that these guide surfaces can be machined.

[0024]

According to the present invention, with a dedicated grinder,
The second guide surface can be processed with the first guide surface of the lathe as a reference, or can be processed with reference to both ends of the double guide surface on the bed of the lathe. There is no need to return the maintenance of accuracy deterioration due to surface wear to the manufacturer for repair, and the effects of the invention are as follows. It eliminates the need to return the lathe to the manufacturer, which leads to a reduction in transportation time and a reduction in equipment holidays, that is, an increase in operating rate. There is no freight cost when returning to the manufacturer.

[Brief description of drawings]

FIG. 1 is a side view of the device of the present invention.

FIG. 2A is a front view of the device of the present invention.

FIG. 2B is a side view of the guide surface in the device of the present invention.

FIG. 3 is a side view of an apparatus showing another embodiment of the present invention.

4 is a plan view of the apparatus of FIG. 3 of the present invention.

FIG. 5 is a perspective view of a normal lathe.

6 is a partial side view of the apparatus of FIG. 3 of the present invention.

[Explanation of symbols]

1 Bed 2a 1st guide surface 2b 1st guide surface 3a 2nd guide surface 3b 2nd guide surface 4 Front of lathe 5a 1st reference block 5b 2nd reference block 6a Roller 6b Roller 7a Roller shaft 7b Roller shaft 8a L-shaped angle 8b L-shaped angle 9 Fixed plate 10 Grindstone 11 Grindstone shaft 12 Holder 13 Handle 14 Nut 15a Motor 15b Motor 15c Motor 16 Expansion / contraction part 17 Moving part of expansion / contraction part 18 Handle 18a Nut 20a Spindle 20b Spindle 21a Belt 21a Belt 22 Rotating roller 23 Shaft 24a Handle 24b Nut 25 Fixing base 27a Third guide surface 27b Third guide surface 27c Third sliding surface 28a Left and right moving base plate 28b Cutting adjustment 29 Leaf spring 30 Cutting adjustment micromeme 31 bed 32 headstock 33 tailstock 34 reciprocating table 35 tool post 36 chuck 37 lead screw 38 feed rod 39 apron 40 foot switch 41 lathe operating direction 42 handle 43 first guide surface 44 second guide surface 45 slide Surface 46 Sliding surface θ ₁ Angle of first guide surface θ ₂ Angle of second guide surface L Distance between guide of first guide surface and second guide surface

Claims (4)

[Claims] 1. A correction method for preventing deterioration of two sliding surfaces and a sliding surface (hereinafter referred to as a guide surface) which are opposed to each other on a bed of a lathe used for two to three years or more. , Without removing the headstock and tailstock, remove only the tool post with the bite and its carriage from the bed, and use the first guide surface on which the headstock and tailstock are mounted as the second A method for correcting a bed sliding surface and a sliding surface of a lathe, which comprises correcting the guide surface by grinding. 2. The method for correcting a bed sliding surface and a sliding surface of a lathe according to claim 1, wherein the reference guide surface is 4
A drive wheel of at least K is provided, a grinding mechanism consisting of a plurality of motors, spindles and grindstones is arranged on the other guide surface for processing, and a cutting adjustment roller is provided on the guide surface to be further processed. A lathe guide surface processing device characterized in that 3. The processing apparatus according to claim 2, wherein a distance on a second guide surface on a side to be processed can be adjusted with respect to a first guide surface serving as a reference, and a cutting adjustment roller is provided. It is possible to finely adjust the cutting of the grindstone, and further it is possible to finely adjust the predetermined cutting even for the slide surface of the second guide surface. Processing equipment. 4. The headstock, tailstock, and shuttle carriage are all removed from the bed of the lathe, and the two on the bed are removed.
The first base plate, which is based on four points at both ends of the guide surface of the strip, is provided, and the first base plate is fixed on the bed, and is parallel to the guide surface on the bed on the first base plate. In addition, it has a single sliding surface and a sliding surface where the height is uniform at the reference point, and a grinding mechanism for processing two guiding surfaces on the bed is provided on the second base plate on the sliding surface. , The plurality of grinding mechanisms are provided on the second base plate and can reciprocate left and right, and the height between the first base plate and the second base plate can be finely adjusted by 1 A lathe guide surface grinding machine characterized in that it can be done at one or more places.