JPH0735689Y2 - Turret for lathe - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tool post for a lathe applied to a lathe.

[Conventional technology]

Usually, in turning of a workpiece by a lathe, a chuck is attached to a rotary spindle of the lathe, the workpiece is held on the chuck, and the workpiece is rotated together with the spindle to perform the turning. Therefore, the shape of the work piece must be able to be held by the chuck. As a result, when making one assembly, each part is held on the lathe for turning, and after the turning, each part is finished. The current situation is to make one assembly by sequentially combining.

By the way, in recent years, computer-related equipment, OA equipment, VTR
For parts used for such purposes, small size and high precision are required, and the end face of the workpiece is required to have submicron surface roughness as well as shape precision. Conventionally, in such precision processing, by slightly changing the position of the cutting edge,
Since a predetermined accuracy can be obtained for the surface roughness of the workpiece end surface, a thin plate, that is, a shim or the like is interposed between the cutting tool and the cutting tool holder on the lower surface of the cutting tool, or the tool post is tapped to change the position of the cutting edge. Is the current situation.

[Problems to be solved by the device]

By the way, in general, when forming and polishing the cutting edge of a lathe turning tool to a predetermined radius, rough polishing, medium polishing and upper polishing are repeatedly performed to achieve a predetermined processing operation. Macroscopically observing the polishing state of the cutting edge formed by this polishing, the surface of the cutting edge is uneven. In the case of a diamond bite that is a single crystal, the polishing state of the cutting edge of the bite is not so uneven,
The diamond bite is expensive, and it is difficult to use it for general turning in terms of cost.

Therefore, at present, in general, a lot of Compax subbites are used in turning. The Compax bite is usually manufactured by sintering particles having a particle size of about 1 μm to 2 μm, and peeling may occur during molding of the cutting edge of the bite. When turning an aspherical workpiece with such a cutting tool, an unturned portion, that is, a protrusion may remain at the center of rotation on the end face of the workpiece. In order to eliminate such a turning processing state, the tightening bolt is loosened as described above and a shim or the like is laid on the lower surface of the cutting tool.

However, when tightening the tool on the tool holder with the tool's tightening bolts, the adjusted tool bit tip position changes slightly, and the tool bit tip position needs to be adjusted. Took time and there was a problem.

The purpose of this device is to solve the above problems,
While the tool is fixed to the tool holder, the reference holder is swung, that is, rotationally displaced, on the swivel base to finely adjust the cutting edge angle of the tool bit edge of the tool, and the tool holder is extremely easy to use with respect to the reference holder. The bite cutting edge height of the cutting tool can be finely adjusted by rotationally displacing it.For example, the remaining part is turned by turning, or the cutting tool tip position of the cutting tool is slightly changed by extremely simple adjustment. The required shape accuracy for the end surface of the workpiece such as an aspherical surface can be ensured, and the sub-micron turning accuracy required for the surface roughness can be obtained. Therefore, the accuracy of the finished surface of the workpiece can be improved. It is to provide a tool post for a lathe that can be improved.

[Means for Solving the Problems]

The present invention is configured as follows in order to achieve the above object. That is, according to the present invention, a reference holder placed on a slide base via a swivel base, a bite holder attached to the reference holder, a side surface of the bite holder movably adjustable, and one side surface of the bite. A bite receiving member placed in contact, a swivel pin that rotatably supports the edge of the reference holder on the cutting edge side of the reference holder on the swivel base, detachably fixed to the swivel base and attached to the reference holder. A stopper installed with a gap in the formed groove, a pair of reference holder protrusions protruding from the reference holder so as to face both sides of the stopper, and a through hole of the reference holder protrusion, respectively. Further, the reference holder is brought into horizontal contact with the stopper so that the reference holder is rotated around the swivel pin. About tool lathe stand, characterized in that it consists of swivel fine adjustment screw for.

[Action]

The tool post for lathe according to the present invention is configured as described above, and operates as follows. That is, this lathe tool rest includes a swivel pin that rotatably supports a reference holder on the bite edge side end of the reference holder, a swivel pin that rotatably supports the reference holder with respect to the swivel base, and the swivel. A stopper that is detachably fixed to the base, a pair of reference holder protrusions that protrude from the reference holder on both sides of the stopper, and a stopper that is respectively screwed into the reference holder protrusion and abuts against the stopper. Since it comprises a swivel fine adjustment screw for horizontally moving the reference holder and rotating the reference holder around the swivel pin, a swivel mechanism is formed between the reference holder and the swivel base, and By adjusting the swivel fine adjustment screw, the cutting edge angle of the cutting edge can be finely adjusted. Moreover, the swivel pin has a pivot point near the edge of the reference holder on the bite edge side, and the distance between the bite edge and the pivot point is compared with the distance between the pivot point and the reference holder moving means. Since it is extremely small, fine adjustment can be performed accurately and easily.

〔Example〕

An embodiment of a lathe tool rest according to the present invention will be described below in detail with reference to the drawings. 1, 2, 3 and 4
FIGS. 5, 5 and 6 show a state in which the lathe tool post according to the present invention is applied to a lathe such as an ultra-precision NC lathe. 1 is a front view of this lathe tool rest, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a left side view of FIG.
4 is a side view on the right side of FIG. 1, FIG. 5 is a front side top view of FIG. 2, and FIG. 6 is a front side top view of FIG.

This lathe tool rest 1 mainly comprises a reference holder 2 mounted on a slide base 55 via a swivel base 37,
Tool holder 3 attached to the reference holder 2, tool holder 5 fixed to the side surface of the tool holder 3 so as to be movable and adjustable, and one side surface of the tool 4 placed in contact with the tool holder, and the cutting edge of the tool.
From the swivel pin 38 that rotatably supports the swivel base 37 near the end of the reference holder 2 on the 15 side, and from the reference holder moving means 60 that moves the other end of the reference holder 2 in the horizontal direction with respect to the swivel base 37. Become.

The reference holder moving means 60 includes a stopper 42 removably fixed to the swivel base 37 and a pair of swivel fine adjustments screwed or screwed into a pair of reference holder protrusions 39 formed at the ends of the reference holder 2. It consists of screws 40 and 41.
As for the positional relationship between the stopper 42 and the screws 40 and 41, the stopper 42 has a gap in a groove 47 formed between the reference holder protrusions 39.
A L _3, L ₄ are installed. Further, the screws 40 and 41 function as swivel fine adjustment members for horizontally moving the reference holder 2 with respect to the stopper 42.

In this lathe tool rest 1, the swivel base 37 is fixed to the slide base 55 of the main body by bolts 53. The reference holder 2 is placed on the swivel base 37,
Although it is fixed by the bolt 44, as shown in FIG. 2, gaps l ₃ , l ₄ are formed between the bolt hole 56 formed in the reference holder 2 and the stem of the bolt 44. The diameter of the bolt hole 56 is set smaller than the diameter of the stem of the bolt 44. Therefore, when the bolt 44 is loosened, the reference holder 2 can move relative to the swivel base 37 by the gap.

Further, the bite holder 3 attached to the reference holder 2
Has a U-shaped cross section and includes a plurality of bolts 11 (first
In the figure, it is fixed to the reference holder 2 by two pieces on the upper part and two pieces on the lower part. In this case, there are gaps l ₁ and l ₂ between the through hole 27 of the bolt 11 drilled in the bite holder 3 and the stem portion of the bolt 11, and when the bolt 11 is loosened, the bite holder 3 Indicates a state in which relative movement is possible with respect to the reference holder 2 by the gap.

Further, on the side surface of the bite holder 3, there is formed a substantially U-shaped groove portion 9 in the longitudinal direction in which the bite receiving member 5 and the bite 4 such as Compax bite and diamond bite are arranged. In the groove 9 of the bite holder 3, a bite receiving member 5 having a plurality of elongated holes 7 is fixed by a bolt 8 so as to be vertically movable. The bite receiving member 5 is
It is formed into a square column with a parallelism accurately configured. An adjusting screw 12 capable of adjusting the height of the cutting tool receiving member 5 is screwed into the lower part of the cutting tool holder 3, and the tip end surface of the adjusting screw 12 is in contact with the lower surface 31 of the cutting tool receiving member 5. Therefore, the bolt 8 penetrating the long hole 7 and screwed into the bite holder 3 is loosened, and the adjusting screw 12 is vertically moved in the major axis direction of the long hole 7 to adjust and set the bite receiving member 5 to a predetermined position. After that, by tightening the bolt 8 into the bite holder 3, the bite receiving member 5 can be fixed to the bite holder 3 at a predetermined position. The lower surface 32 of the cutting tool 4 is placed in contact with the upper surface 30 of the cutting tool receiving member 5, and then,
The tool 4 can be detachably fixed by bringing a plurality of tightening bolts 6 screwed from the upper part of the tool holder 3 into contact with the upper surface 33 of the tool 4 and pressing it against the tool receiving member 5.

In this lathe tool rest 1, a pin insertion hole 14 is formed near the front side of the cutting tool holder 3, in other words, near the end on the cutting tool tip 15 side. Further, as shown in FIG. 3, a V-shaped groove 26 is formed in the reference holder 2, and a pin 10 is arranged in the V-shaped groove 26. The pin 10 enables the clamp 13 to be removed from the reference holder 2 by a bolt 16. Set by fixing. In this case, the tightening force of the clamp 13
It is sufficient that 10 can slide in the rotational direction around the pin axis.

The pin 10 is inserted into a pin insertion hole 14 formed in the bite holder 3 as shown in FIG. In other words,
The bite holder 3 is pivotally supported on the reference holder 2 with the pin 10 as the center of rotation. Therefore, the reference holder 2 and the bite holder 3
When the bolt 11 for fixing the tool is loosened, the tool holder 3 can be rotated about the reference holder 2 with the pin 10 as the center of rotation. That is, the center of rotation of the bite holder 3 with respect to the reference holder 2 is constituted by the pin 10 which is detachably fixed to the reference holder 2.

Furthermore, at the rear side of the reference holder 2, in other words, at the end of the bite holder 3 located at the end opposite to the side of the bite cutting edge 15, a groove having a substantially U-shape in a direction substantially perpendicular to the groove 9 is formed. 34 are formed. A substantially U-shaped recess 18 is formed in the reference holder 2, the upper surface 36 of the recess 18 is located below the upper surface 19 of the groove 34 formed in the bite holder 3, and the lower surface 35 of the recess 18 is formed in the bite holder 3. It is located above the lower surface 29 of the groove 34.

A stopper 17 is fitted into a recess 18 formed in the reference holder 2 and fixed by a bolt 21. The end of the stopper 17 projects into the groove 34 formed in the end of the bite holder 3. A gap L ₁ is formed between the upper surface 20 of the stopper 17 and the upper surface 19 of the groove 34, and the lower surface 28 of the stopper 17 and the groove 34 are formed.
A gap L ₂ is formed between the lower surface 29 and the lower surface 29. In the figure,
Upper and lower surfaces 20, 28 of the stopper 17 protruding toward the bite holder 3 side
Is installed so as not to contact the upper and lower surfaces 19 and 29 of the groove 34 formed in the bite holder 3. That is, the stopper 17
Tool holder 3 that is detachably fixed to the reference holder 2
The grooves 34 formed in the above are fitted with gaps L ₁ and L ₂ .

Further, a through hole 23 is formed in the upper part of the bite holder 3,
A bite height fine adjusting screw 22 penetrates the through hole 23 and is screwed into the stopper 17. Therefore, the bite height fine adjusting screw 22 has a function of vertically moving the bite holder 3 and fixing the bite holder 3 and the stopper 17 so as to maintain the gap L ₁ . A through screw hole 25 is formed in the upper part of the bite holder 3, and a bite height fine adjusting screw 24 is screwed into the through screw hole 25. The lower end surface of the bite height fine adjusting screw 24 projects downward so as to contact the upper surface 20 of the stopper 17. Therefore, the bite height fine adjusting screw 24 is provided on the upper surface 19 of the groove 34 formed on the tool holder 3 and the upper surface of the stopper 17.
It has a function of setting the size of the gap L ₁ between the two.

By adjusting these bite height fine adjustment screws 22 and 24,
The end of the bite holder 3 can be moved vertically with respect to the reference holder 2. Therefore, if the bolt 11 for fixing the bite holder 3 to the reference holder 2 is loosened and the bite height fine adjustment screws 22 and 24 are adjusted to move the bite holder 3 with respect to the reference holder 2, the bite holder 3 Is pin 10
It is possible to rotate or pivot with respect to the reference holder 2 about the rotation center, then tighten the bite height fine adjusting screw 22 to the stopper 17 and tighten the bolt 11 to firmly fix the bite holder 3 to the reference holder 2. it can. By this, the cutting edge of the cutting tool 4 fixed to the cutting tool holder 3
The height of 15 will be fine-tuned.

Further, the lathe tool rest 1 is characterized in that it has a structure capable of rotating the reference holder 2 with respect to the swivel base 37, that is, a swivel mechanism.

In the swivel mechanism, the pin insertion hole 54 is provided near the front side of the reference holder 2, in other words, near the end on the bite cutting edge 15 side.
Are formed. Further, as shown in FIG. 5, a V-shaped groove 51 is formed in the swivel base 37, a swivel pin 38 is arranged in the V-shaped groove 51, and the swivel pin 38 is detached from the swivel pin pressing clamp 45 with the bolt 46 to the swivel base 37. Set by fixing possible.

In this case, the tightening force of the swivel pin pressing clamp 45 is
It is sufficient that the swivel pin 38 can rotate in the rotation direction about the pin axis. The swivel pin 38 is shown in FIG.
As shown in the figure, the pin insertion hole formed in the reference holder 2
It is press-fitted and fixed to 54. In other words, the reference holder 2
Is pivotally supported on a swivel base 37 with a swivel pin 38 as the center of rotation.

Therefore, when the bolt 44 for fixing the reference holder 2 to the swivel base 37 is loosened, the reference holder 2 can be rotated with respect to the swivel base 37 with the swivel pin 38 as the center of rotation. That is, the center of rotation of the reference holder 2 with respect to the swivel base 37 is detachably attached to the swivel base 37, and a swivel pin pressing clamp 45 and a fixing bolt are provided.
It is constituted by a swivel pin 38 fixed by 46.

Further, at the end of the reference holder 2 located at the rear side of the reference holder 2, in other words, at the end opposite to the bite cutting edge 15 side, a pair of reference holder projecting portions 39, 3 horizontally spaced from each other.
9 protrudes, and a substantially U-shaped groove portion 47 is formed between the reference holder protruding portions 39, 39 in a substantially vertical direction.

A substantially U-shaped recess 48 is formed in the swivel base 37, and a stopper 42 is fitted into the recess 48 and fixed by a bolt 43. The horizontal length of the recess 48 is smaller than the horizontal length of the groove 47 formed in the reference holder 2. Further, the end portion of the stopper 42 projects into the groove portion 47 formed in the end portion of the reference holder 2.

There should be a gap between the side surface 50 of the stopper 42 and the side surface 49 of the groove 47.
L _3, L ₄ are formed. In the figure, both side surfaces 50, 50 of the stopper 42 protruding toward the reference holder 2 side are installed in a state of not contacting both side surfaces 49 of the groove portion 47 formed in the reference holder 2. That is, the stopper 42 is detachably fixed to the swivel base 37 and fitted in the groove portion 47 formed in the reference holder 2 with gaps L ₃ and L ₄ .

Further, the pair of reference holder protrusions 39, 39 have through-holes 52, 52.
The swivel fine adjustment screws 40 and 41 are respectively inserted and screwed into these through holes 52, and the tip end portions of these swivel fine adjustment screws 40 and 41 abut on both side surfaces of the stopper 42. ing. Therefore, swivel fine adjustment screws 40, 4
Reference numeral 1 denotes the reference holder 2 and the stopper so that the reference holder 2 is moved in the horizontal direction and the predetermined gaps L ₃ and L ₄ formed between the stopper 42 and the reference holder protrusion 39 are maintained. Performs the function of fixing 42 and.

Therefore, if the fixing bolt 44 that fixes the reference holder 2 to the swivel base 37 is loosened and the swivel fine adjustment screws 40 and 41 are adjusted to move the reference holder 2 with respect to the swivel base 37, the reference holder 2 will be By rotating or pivoting the swivel pin 38 about the swivel base 37 with respect to the swivel base 37 and then tightening the fixing bolt 44, the reference holder 2 can be firmly fixed to the swivel base 37.

In this way, when the reference holder 2 is horizontally rotated with respect to the swivel base 37, as shown in FIG. 7, the cutting tool tip 15 of the cutting tool 4 attached to the reference holder 2 via the tool holder 3 is cut. Fine adjustment of the blade angle is required.

FIG. 7 schematically shows the relationship between the workpiece 57 and the cutting edge 15 of the cutting tool 4. Byte 4 for workpiece 57
That is, when the bite shank is moved in the direction of arrow G,
Reference symbol E indicates the side cutting edge angle, and reference symbol F indicates the front cutting edge angle. As an example, the reference holder protrusion of the reference holder 2
While measuring the amount of movement by applying a dial gauge to the side surface of 39, operate the swivel fine adjustment screws 40 and 41, and, for example, move the rear portion of the reference holder 2, that is, the end portion on the opposite side of the cutting edge 15
When moved by 10μ, the cutting edge of the cutting tool 4 15
And the distance between the rotation center of the swivel pin 38 and X is Y, and the distance between the rotation center of the swivel pin 38 and the swivel fine adjustment screws 40, 41 is Y, the movement amount Z of the cutting tool edge 15 is Z = 10X /
It becomes Y. In this case, since X is much smaller than Y, it is compared with the moving amount of the rear portion of the reference holder 2 by the cutting tool 4
The moving amount of the bite cutting edge 15 is extremely small, and the bite cutting edge 15 can be finely adjusted.

This lathe tool rest 1 is configured as described above,
It can be roughly assembled as follows. Byte 4
The height H of the cutting tool edge 15, for example, the length from the surface of the slide base 55 to which the reference holder 2 is attached to the upper surface of the cutting tool edge 15 is roughly set using a height gauge.
Then, the length from the points C and D on the lower surface of the cutting tool receiving member 5 to the upper surface of the cutting tool edge 15, that is, the height h, is adjusted with the cutting tool height adjusting screw 12 using a measuring instrument such as a dial gauge. Set roughly. In this case, the bite receiving member 5
Also adjust the parallelism, in other words, the horizontality. Thus, the height h of the cutting edge 15 and the cutting tool receiving member 5
After roughly setting the parallelism, the bolt 8 penetrating the long hole 4 is tightened to firmly fix the bite receiving member 5 to the bite holder 3. Further, the cutting tool 4 is firmly fixed by a bolt 6 screwed into the upper part of the cutting tool holder 3.

Next, when finely adjusting the height H of the cutting tool tip 15 of the cutting tool 4, for example, when turning the workpiece and adjusting the height H of the cutting tool tip 15, the tool holder 3 Slightly loosen the bolt 11 that is fixed to the reference holder 2 from the tightened state. The tool 4 and the tool receiving member 5 are fixed to the tool holder 3, and the tool height fine adjusting screws 22 and 24 acting on the stopper 17 are operated and adjusted. In this case, for example, a dial gauge is placed on the upper surface 19 of the groove portion 34 formed in the bite holder 3 at a position B, and the upper surface 20 of the stopper 17 and the upper surface 19 of the groove portion 34 of the bite holder 3 are in a positional relationship. Measure.

First, the bite height fine adjustment screw 22 is loosened, and the bite height fine adjustment screw 24 is tightened to project the tip of the bite height fine adjustment screw 24 into the groove 34 of the bite holder 3. Since the tip end contacts the upper surface 20 of the stopper 17, and the stopper 17 is fixed to the reference holder 2 by the bolt 21, the point B of the cutting tool holder 3 has the bite height fine adjustment screw 24 on the upper surface 20 of the stopper 17. The reference holder 2 by the reaction force to press
Move up against. That is, the point B of the bite holder 3 rises.

On the contrary, loosen the bite height fine adjustment screw 24 and raise it inside the bite holder 8,
When 22 is tightened, the upper surface 19 of the groove 34 of the cutting tool holder 3 is brought closer to the upper surface 20 of the stopper 17, and the point B of the cutting tool holder 3 moves downward with respect to the reference holder 2.

As described above, by moving the end portion of the bite holder 3 in the vertical direction with respect to the reference holder 2, the bite holder 3 makes a rotational movement, that is, a pivot movement with respect to the reference holder 2 about the pin 10 as a rotation center. The point A of the cutting edge 15 fixed to the cutting tool holder 3 moves vertically with respect to the reference holder 2. That is, if the point B of the cutting tool holder 3 moves upwards, the point A of the cutting tool tip 15 moves downward, and if the point B of the cutting tool holder 3 moves downwards, the point A of the cutting tool tip 15 moves.
The point will move upwards. Moreover, since the position where the pin 10 is attached is in the vicinity of the bite cutting edge 15, as compared with the moving amount of the point B of the bite holder 3, the cutting edge 15
The amount of movement of point A becomes extremely small. Therefore, the height H of the cutting edge 15 can be adjusted very easily, with high precision and accuracy.

[Effect of device]

The lathe tool post according to the present invention is configured as described above and has the following effects. That is, as described above, this lathe tool post is configured so that the reference holder is rotatable with respect to the swivel base by pivotally supporting the bite edge side end portion of the reference holder on the swivel pin. A swivel mechanism is formed between the swivel base and
By adjusting the swivel mechanism, the cutting edge angle of the cutting edge can be finely adjusted. Moreover, the pivot point is on the bite side, and the distance between the cutting edge and the pivot point is extremely small compared to the distance between the pivot point and the reference holder moving means. It can be done easily. Further, by rotating the reference holder with respect to the swivel base while the tool is fixed to the tool holder, the cutting edge angle of the tool cutting edge can be easily finely adjusted.

Further, the reference holder moving means is detachably fixed to the swivel base, and the stopper is installed with a gap in the groove formed in the reference holder, and the swivel fine adjustment screw for horizontally moving the reference holder with respect to the stopper. With this configuration, the position can be accurately set by the fine adjustment screw for swivel, and the reference holder can be securely and firmly fixed to a predetermined position.

[Brief description of drawings]

1 is a front view of the lathe tool rest 1, FIG. 2 is a side view of the left side of FIG. 1, FIG. 3 is a side view of the left side of FIG.
1 is a side view on the right side of FIG. 1, FIG. 5 is a front side top view of FIG. 2, FIG. 6 is a front side top view of FIG. 4, and FIG. It is a schematic diagram showing a relation of. 1 ... Lathe turret, 2 ... Reference holder, 3 ... Tool holder, 4 ... Tool, 5 ... Tool receiving member, 45 ...
Clamp, 15 …… bite cutting edge, 42 …… Stopper, 37 ……
Swivel base, 38 …… Swivel pin, 39 …… Reference holder protrusion, 40,41 …… Swivel fine adjustment screw, 55 …… Slide base.

Claims (1)

[Scope of utility model registration request] 1. A reference holder mounted on a slide base via a swivel base, a bite holder attached to the reference holder, fixed to a side surface of the bite holder so as to be movable and adjustable, and contacting one side surface of the bite. In position, a swivel pin that rotatably supports the swivel base near the end of the reference holder on the cutting edge side, and a groove that is detachably fixed to the swivel base and is formed in the standard holder. A stopper installed with a gap in between, a pair of reference holder protrusions protruding from the reference holder so as to face both sides of the stopper, and a stopper screwed into each of the through holes of the reference holder protrusions. Abutting against the stopper to move the reference holder horizontally with respect to the stopper to rotate the reference holder around the swivel pin. Tool rest for lathes, characterized in that it consists of swivel fine adjustment screw.