JPS63318239A - Bar turning machine - Google Patents

Abstract

PURPOSE:To increase the life of a byte by guiding cutting liquid jetting from an opening at the end of a cutting liquid injection hole formed in the end surface of a cutter head on the upstream in the work moving direction toward the forward end of a cutting tool by means of a cutting liquid guide matter. CONSTITUTION:Cutting liquid jetting from an opening at the end of a cutting liquid flow hole 22 formed in a guide holder 2 and penetrating into a cutting liquid flow groove 24 formed in a cutter head 5 is energized toward a cutting liquid jetting hole 26 by rotation of the cutter head 5 and jetted from the cutting liquid jetting hole 26 strongly. It reaches around the forward end of a cutting tool (byte) 4. Cutting liquid reaches around a work position without being hindered by a baffle plate 6, so as sufficient quantity of cutting liquid is supplied around the work position. In addition, since cutting liquid is supplied from the front side of the work position, abrasion of the byte 4 can be prevented desirably, while life is increased, and because cutting chips can be removed effectively, finishing precision can be improved without producing flaws in the cutting face.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a method for continuously cutting the outer circumferential surface of a rod-shaped workpiece, such as a wire, bar, or tube, using a cutting tool of a rotating cutter head. The present invention relates to a patterning machine for machining, and particularly to its cutting fluid supply mechanism.

(Prior art and its problems) The conventional patterning machine, as shown in Fig. 4,
The cylindrical guide holder 51 has a hole 53 that opens in the outer peripheral surface of the end of the guide holder 51 opposite to the cutter head 52 side and extends in the radial direction, and a hole that communicates with the hole 53 and extends in the axial direction. 54, an annular groove 55 formed on the outer peripheral surface of the guide holder 51 and communicating with the hole 54, and a plurality of holes 56 communicating with the groove 55 and extending in the radial direction.
A plurality of holes 57 communicating with these holes 56 and extending in the axial direction
and an annular nozzle 58 attached to the end surface of the guide holder 51 on the cutter head 52 side.
A plurality of ejection holes 59 are provided in communication with the number hole 57, and a cutting fluid flow path 60 is constituted by the hole 53.54, the groove 55, the hole 56.57, and the ejection hole 59. The cutting fluid was configured to be ejected from the ejection hole 59 toward the tips of a plurality of cutting tools 61 as cutting tools supported by the cutter head 52 . A baffle plate 62 is fixed to the face of the cutter head 52 facing the nozzle 58, and this baffle plate 62 prevents cutting waste from the workpiece 63 by the cutting tool 61 from entering the inside of the guide holder 51. This is to prevent the The cutter head 52 is attached to one end of a cylindrical rotating shaft 64 that loosely fits on the outer circumferential side of the guide holder 51, and the rotating shaft 64 is mounted on a patterning machine body 65 with a plurality of bearings 66.
It is rotatably supported via. A gear 67 is fitted and fixed on the outer peripheral surface of the rotating shaft 64.
It is rotationally driven around the axis by a drive device (not shown) via 7. 68 is a plurality of rollers that support and position the workpiece 63.

However, with the above conventional patterning machine,
Since the structure is such that the cutting fluid spouted from the spout hole 59 passes through the gap between the baffle plate 62 and the workpiece 63 and reaches the vicinity of the tip of the cutting tool 61, the amount of cutting fluid that reaches the vicinity of the tip of the cutting tool 61 is reduced. The supply amount of cutting fluid is very low, and the cutting fluid is supplied from behind the machining position. As a result, the cutting tool 61 is severely worn and its life is shortened, and the cutting chips are not removed sufficiently, causing scratches on the cutting surface, resulting in a deterioration in the machining accuracy of the finished surface.

Also, attempts have been made to supply cutting fluid in the direction of arrow A in FIG. 4 from the side opposite to the baffle plate 62 of the cutter head 52, but since the cutter head 52 rotates, the cutting fluid is splashed away. Therefore, the above-mentioned inconvenience could not be solved.

The overall structure of a conventional patterning machine is described in, for example, Utility Model Application No. 81-182188.

(Means for Solving the Problems) In order to solve the above problems, the patterning machine of the present invention guides the workpiece by loosely fitting it around the outer circumference of a rod-shaped workpiece that moves in the longitudinal direction. A cylindrical guide holder, a cylindrical rotating shaft that loosely fits on the outer circumference of the guide holder, and a blade tool that is attached to the upper end of the rotating shaft in the direction of movement of the workpiece and processes the workpiece. An annular cutter head that supports the cutter head, and an annular cutter head that is installed between the cutter head and the upper end surface of the guide holder in the direction of movement of the workpiece, so that debris from the workpiece produced by the blade tool enters the inside of the guide holder. In a burning machine equipped with an annular baffle plate that prevents the cutter head from moving, a cutting fluid flow hole is formed in the guide holder, the end of which opens on the upper end surface of the guide holder in the workpiece movement direction; A cutting fluid circulation groove is formed on a surface on the downstream side in the direction of movement of the workpiece, and has a circular arc shape concentric with the outer periphery of the cutter head and can face the terminal opening of the cutting fluid circulation hole, A cutting fluid jetting hole is formed that passes through the cutter head in the axial direction at an upper end position in the cutter head rotation direction of the fluid flow groove, and the cutting fluid jetting hole is formed on the upper surface of the cutter head in the workpiece movement direction. A cutting fluid guide body is attached to guide the cutting fluid ejected from the hole toward the tip of the cutting tool.

(Function) The cutting fluid that is ejected from the end opening of the cutting fluid flow hole formed in the guide holder and enters the cutting fluid flow groove formed in the cutter head is urged toward the cutting fluid jet hole side by the rotation of the cutter head. The cutting fluid is then vigorously jetted out from the cutting fluid spouting hole, and the direction is changed by the cutting fluid guide and reaches the vicinity of the tip of the cutting tool.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

FIG. 1 is a longitudinal sectional side view of the main parts of a patterning machine according to an embodiment of the present invention, and FIG. 2 is a front view of the same. It is transported in the direction of the arrow in FIG. 1 by the transport device. A cylindrical guide holder 2 for guiding the workpiece 1 is loosely fitted on the outer circumference of the workpiece 1, and a cylindrical rotating shaft 3 is loosely fitted on the outer circumference of the guide holder 2. There is. This rotating shaft 3
is rotatably supported by a patterning machine main body (not shown), and at the upper end in the moving direction of the workpiece 1, there is a blade tool as an example of a cutting tool for cutting the outer peripheral surface of the workpiece 1. An annular cutter head 5 supporting a plurality of cutting tools 4 is fixed. On the end surface of the cutter head 5 on the lower side in the moving direction of the workpiece 1, that is, on the guide holder 2 side,
An annular baffle plate 6 is fixed to the guide holder 2 to prevent machining debris from the workpiece 1 cut by the cutting tool 4 from entering the guide holder 2. The cutter head 5 is rotationally driven by the rotating shaft 3 in the direction of the arrow in FIG.

The guide holder 2 has a cylindrical guide holder body 8.
and an annular nozzle portion 9 that is removably fixed to the upper side of the guide holder main body 8 in the moving direction of the workpiece 1, that is, on the cutter head 5 side. Four protrusions 10 are protruded from the upper end surface of the workpiece 1 in the moving direction at equal intervals in the circumferential direction to form four substantially cross-shaped parts, and each protrusion 10 has a long hole 11 formed therein. The rotary shaft 3 is fixed to the upper end surface of the rotating shaft 3 in the moving direction of the workpiece 1 by a bolt 12 passing through the rotary shaft 3.

In each of the recesses of the cutter head 5, adjustment plates 15 having protrusions 14 that protrude outward in the radial direction from the outer periphery of the cutter head 5 are disposed, and each of these adjustment plates 1
A cutting tool holder 17 is fixed to 5 with two bolts 16. Each of these cutting tool holders 17 has the cutting tool 4 fixed at its tip, and by moving the adjustment ring 18 in the axial direction of the rotating shaft 3 using an adjustment mechanism not shown, the adjustment plate 15 is moved in the radial direction of the cutter head 5. As a result, the position of the cutting tool 4 changes together with the cutting tool holder 17, so that the amount of cutting can be finely adjusted. Of both sides of each tool holder 17, the side on the upper side in the direction of rotation of the cutter head 5 contacts the side wall of the convex portion 10, and the side near the side on the lower side in the direction of rotation of the cutter head 5 contacts the cutter of the presser foot 19. The head 5 is pressed down and fixed near the side surface on the upper side in the direction of rotation. These six presser feet 19 are fixed to the cutter head 5 with two bolts 20,
The side surface of the cutter head 5 on the lower side in the rotational direction is provided with the convex portion 10.
is in contact with the side wall of

The guide holder 2 includes the guide holder main body 8.
Four cutting fluid circulation holes 22 are formed across the nozzle portion 9 and the starting end of each of these cutting fluid circulation holes 22 is not shown, but the starting end of each cutting fluid circulation hole 22 is connected to the cutting fluid opening on the outer circumferential surface of the guide holder main body 8. The terminal end, which communicates with the inflow port and is located inside the nozzle section 9, is slightly bent toward the outside in the radial direction of the nozzle section 9 and opens into the tapered outer circumferential surface of the nozzle section 9. . On the end surface of the cutter head 5 on the lower side in the moving direction of the workpiece 1, that is, on the guide holder 2 side,
Four cutting fluid distribution grooves 24 that can face the terminal opening of each of the cutting fluid distribution holes 22 are formed, and each of these cutting fluid distribution grooves 24 is formed in the same arc shape as the outer periphery of the cutter head 5. has been done. At the end of each of these cutting fluid distribution grooves 24 on the upper side in the direction of rotation of the cutter head 5, a starting end opens at the bottom surface of the cutting fluid distribution groove 24, and a terminal end opens at the above-mentioned convex portion 10.
Cutting fluid ejection holes 26 opening on the surface of the cutter head 5
A cutting fluid guide body 28 is fixed to the surface of each convex portion 10 . As shown in detail in FIG. 3, each of these cutting fluid guide bodies 28 has an arcuate portion 28a facing the cutting fluid jet hole 26,
The cutting fluid spouted from the cutting fluid spout hole 26 is guided toward the tip of the cutting tool 4 as shown by the arrow in FIG. Although the cutting fluid guiding body 28 is provided corresponding to each cutting fluid jetting hole 26, only one cutting fluid guide body 28 is shown in FIG. 2 in order to make the drawing easier to understand.

Next, the effect will be explained. The workpiece 1 is conveyed in the direction of the arrow in FIG. 1, and is moved by the cutting tool 4, which is fixed via the cutting tool holder 17 to the cutter rad 5, to the cutter which is rotationally driven in the direction of the arrow in FIG. 2 by the rotating shaft 3. The outer circumferential surface is continuously machined. On the other hand, cutting fluid such as water or oil supplied from a cutting fluid inlet (not shown) passes through the cutting fluid distribution hole 22 of the guide holder 2 and is ejected from the end of the cutting fluid distribution hole 22, causing the cutter head 5 to cut. The liquid flows into the liquid flow groove 24. At this time, the cutting fluid distribution hole 22 does not move, and the cutting fluid distribution groove 24 rotates together with the cutter head 5, but the cutting fluid distribution groove 24 is formed in an arc shape that is the same as the outer periphery of the cutter head 5. Since each cutting fluid flow hole 22 almost always faces one of the cutting fluid flow grooves 24, most of the cutting fluid flows into the cutting fluid flow groove 24. Since the cutter head 5 is rotating in the direction of the arrow in FIG. 2, the cutting fluid that has flowed into each of the cutting fluid distribution grooves 24 is urged in the opposite direction to the arrow direction in FIG. The cutting fluid flows into the starting end opening of the cutting fluid jetting hole 26, passes through the cutting fluid jetting hole 26, and is vigorously jetted out from the terminal opening of the cutting fluid jetting hole 26.

This cutting fluid flows through the arc-shaped portion 28 of the cutting fluid guide body 28.
It collides with a, changes its direction, reaches near the tip of the cutting tool 4, and lubricates, cools, and cleans the workpiece 1 and the cutting tool 4.

In this way, the cutting fluid ejected from the terminal opening of the cutting fluid jet hole 26 formed on the upper end surface of the cutter head 5 in the moving direction of the workpiece 1 is directed to the cutting tool 4 by the cutting fluid guide 28.
Since the cutting fluid is guided toward the tip of the machining position, the cutting fluid reaches the vicinity of the machining position without being obstructed by the baffle plate 6, and a sufficient amount of cutting fluid is supplied to the vicinity of the machining position. Since cutting fluid is supplied to the machining position where cutting fluid is most needed and the vicinity in front of it, it is possible to effectively prevent wear of the cutting tool 4 and extend its life, as well as to reduce the amount of chips. Since it can be removed quickly, there will be no scratches on the cut surface, and finishing accuracy can be improved.

(Another Embodiment) In the above embodiment, four cutting tools 4 are attached to the cutter head 5, and four cutting fluid circulation holes 22, cutting fluid circulation grooves 24, cutting fluid spouting holes 26, cutting fluid guide bodies 28, etc. Although an example in which four pieces are provided has been described, the number of these pieces is not limited to four, and any number may be provided depending on various design conditions.

Further, in the above embodiment, an example was explained in which the guide holder 2 was composed of the guide holder main body 8 and the nozzle part 9, but in this case, the cutter head 5 could be replaced when processing workpieces 1 having different diameters. If the cutter head 5 is not designed to be replaceable, the guide holder main body 8 and the nozzle part 9 may be integrated.

(Effects of the Invention) As explained above, according to the present invention, the cutting fluid ejected from the end opening of the cutting fluid jet hole formed on the upper end face of the cutter head in the workpiece movement direction is guided through the cutting fluid. Since the body guides the cutting fluid toward the tip of the cutting tool, the cutting fluid reaches the vicinity of the machining position without being obstructed by the baffle plate, and a sufficient amount of cutting fluid is supplied to the vicinity of the machining position. Since the cutting fluid is supplied from the side, the cutting fluid is well supplied to the machining position where cutting fluid is most needed and near the front of the machining position, which can effectively prevent wear of the cutting tool and extend its life. Since powder can be removed well, there will be no scratches on the machined surface, and finishing accuracy can be improved.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view of essential parts of a patterning machine according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a sectional view taken along the line FIG. 4 is a longitudinal sectional side view of the main parts of a conventional patterning machine. 1... Workpiece, 2... Guide holder, 3...
Rotating shaft, 4... Bit (blade tool), 5... Cutter head, 6... Baffle plate, 22... Cutting fluid flow hole, 2
4... Cutting fluid distribution groove, 26... Cutting fluid spout hole, 28
...Cutting fluid guide

Claims (1)

[Claims] A cylindrical guide holder that loosely fits on the outer circumference of a rod-shaped workpiece that moves in the longitudinal direction and guides the workpiece, a cylindrical rotating shaft that loosely fits on the outer circumference of this guide holder, and a cylindrical rotating shaft that loosely fits on the outer circumference of the guide holder. an annular cutter head that is attached to an end of the shaft on the upper side in the direction of movement of the workpiece and supports a blade tool for machining the workpiece; and an end surface of the cutter head and the guide holder on the upper side in the direction of movement of the workpiece; and an annular baffle plate installed between the guide holder and the annular baffle plate to prevent the machining debris of the workpiece produced by the blade tool from entering the guide holder, the burning machine having a ring-shaped baffle plate installed between the guide holder and the guide holder, the annular baffle plate being installed between the guide holder and A cutting fluid flow hole is formed in the upper end surface of the cutter head in the workpiece movement direction, and the cutting fluid flow hole is formed in an arc shape concentric with the outer periphery of the cutter head and is formed on the lower end surface of the cutter head in the workpiece movement direction. A cutting fluid distribution groove that can be opposed to the end opening of the distribution hole is formed, and a cutting fluid is ejected from the cutter head to pass through the cutter head in the axial direction at an upper end position of the cutting fluid distribution groove in the direction of rotation of the cutter head. A cutting fluid guide body having a hole formed therein and guiding the cutting fluid ejected from the cutting fluid spouting hole toward the tip of the cutting tool is attached to the upper surface of the cutter head in the workpiece movement direction. A bar turning machine featuring: