JP2008221388A - Coolant feeding device for machining - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve seizure of a workpiece due to defective cooling and various kinds of problems caused by the seizure, even if an outlet is simply narrowed and high pressure coolant is supplied. <P>SOLUTION: This coolant feeding device 10 is provided with an introducing pipe 11 for introducing cooling liquid and a nozzle 12 connected to the introducing pipe 11. In the nozzle 12, two mutually same surfaces 13 and 14 are provided, four surfaces of the surfaces 13 and 14 are mutually connected at a right angle, and an internal passage is formed at the inside. Each of the surfaces 13 is provided with inclination parts 13a mutually approaching as they becomes closer to the outlet 15. The outlet 15 is formed into a square shape having each of four corners C forming a right angle. The introducing pipe 11 is a U-shaped pipe in which each of four elbows 11 is combined via a piping pipe 11b. The nozzle 12 can be rotated around (an arrow θx direction) the axis O<SB>1</SB>and an axis Ox parallel to the axis O<SB>1</SB>, and the nozzle 12 can be rotated around an axis Oy direction (an arrow θy direction) orthogonal to the axis Ox. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus for supplying a coolant to a workpiece when performing machining such as rolling, cutting, and grinding.

  FIG. 7 is a schematic view illustrating a device D for thread grinding a workpiece and a conventional coolant supply device 30 used for thread grinding.

Symbol G is a pinion reduction which is a component of the automatic transmission (reduction gear), sign W is a pinion reduction G as workpiece, at its shaft end G _S, for grinding the threads S _t It is a grindstone.

In the device D, to rotate the grinding wheel W in the direction of the arrow, forming a thread S _t by pressing the pinion reduction G with great force against the grindstone W to this rotation. For this reason, as shown in the figure, the coolant supply device 30 arranges the introduction pipe 31 that guides the coolant C _L above the grindstone W, and hangs the nozzle 32 from the introduction pipe 31 to cool the coolant C _L. the supplies to the shaft end G _s.

However, if the outlet 35 of the nozzle 32 is circular, although the coolant C _L screw mountain S _t spread over the entire shaft end G _S to be formed, since the coolant C _L gets scattered, the shaft there is a problem that the polishing burnt with cooling defective end portion G _S occurs. Such polishing burn is not preferable in order to shorten the life of the grindstone W.

Therefore, the conventional coolant supply apparatus, by the outlet 35 of the nozzle 32 and the elongated hole shape, is that to be able to spray supplying coolant C _L across the entire portion which requires processing (For example, refer to Patent Document 1).
Japanese Patent Laying-Open No. 2002-178078 (paragraph number [0006], FIG. 1)

However, the conventional apparatus still has a problem that grinding burn occurs in the workpiece. Therefore, instead of the spray supply by squeezing the closer the nozzle 32 to the outlet 35, it was tried cooling by the high-pressure coolant C _L, still did not result in grinding burn is eliminated. This is because increasing the pressure of the coolant C _L in order to achieve a reliable cooling, the coolant C _L is considered can not be appropriately supplied to the desired cooling portion.

  As a result, in addition to the short life of the grindstone W, all the workpieces after grinding must be visually inspected, resulting in a problem that the production process becomes complicated.

  On the other hand, it is considered that the grinding wheel rotation speed is lowered to prevent polishing burn, but if the grinding wheel rotation speed is lowered, a new problem that the processing time becomes longer occurs.

  Moreover, if it is attempted to cover insufficient cooling with the length of the processing time, the life of the grindstone W is further shortened. To eliminate this, a rotary dress ( (This is not shown in the figure).

  The problem to be solved by the present invention is that, even if the exhaust port is simply squeezed and a high coolant is supplied, the work piece is seized due to poor cooling, and the object of the present invention is to It is to prevent seizure and eliminate various problems caused by the seizure.

  The present invention is formed with an introduction pipe for guiding a coolant supplied to a workpiece in machining, and an exhaust passage through which the coolant sent from the introduction pipe passes and communicates with the outside passage. A coolant supply device for machining comprising the nozzles, wherein the nozzles have two sets of two surfaces that are identical to each other, and these four surfaces are connected to each other at a right angle so that the internal passages are formed inside the nozzles. It is formed, and at least one pair of surfaces is provided with inclined portions that are symmetrical to each other as they approach the discharge port, and the discharge port is formed in a quadrangle whose four corners form right angles. is there.

  According to the present invention, the four surfaces are defined as two identical surfaces that form a long side and two identical surfaces that form a short side. Symmetrically inclined portions that approach each other as they approach each other can be provided, and the discharge port can be formed into a rectangle whose four corners form a right angle.

  In the present invention, it is preferable that the nozzle has two sets of two identical plates and is a combination of the plates.

  In the present invention, the introduction pipe is connected to the nozzle in a suspended state, and includes at least a mechanism for rotating the nozzle around its axis, and a mechanism for rotating the nozzle around its width direction. It is preferable to have. In particular, in this case, the introduction pipe is preferably a U-shaped pipe in which four elbows are combined.

  According to the coolant supply device of the present invention, a coolant having a high pressure can be appropriately supplied to a desired location, so that seizure of a workpiece due to poor cooling is prevented, and the tool life represented by a grindstone or the like is reduced. Can be extended.

  In addition, according to the present invention, it is not necessary to visually inspect all the workpieces after machining, and the production process can be simplified.

  Further, according to the present invention, since the cooling can be appropriately performed, it is not necessary to lengthen the machining time for each workpiece in consideration of seizure, and therefore the machining time can be shortened. In addition, by shortening the machining time, the life of other tools represented by a rotary dress or the like can be extended.

  The above-described effect is that the nozzle according to the present invention has two sets of two surfaces that are identical to each other, and these four surfaces are connected to each other at right angles to form an internal passage on the inside thereof. Since each surface flows through the internal passage evenly interfering with each other, turbulence in the passage is unlikely to occur, and at least one pair of surfaces approach each other as they approach the discharge port. Since the nozzle has a throttle on the discharge port side, turbulent flow is unlikely to occur in the passage while the pressure of the coolant is increased, and the discharge port has a quadrangular shape with four corners forming right angles. This is because the twist is not generated when the coolant is discharged due to the four corners of the discharge port being rounded.

  Further, in the present invention, the four surfaces are composed of two identical surfaces having long sides and two identical surfaces having short sides, and each of the two surfaces having long sides is divided into the two surfaces. By providing symmetrically inclined portions that approach each other as they approach the exit, and forming the discharge port in a rectangle whose four corners form a right angle, the contact surface between the workpiece and the tool is almost a line as in, for example, grinding. It is effective for supplying the coolant when it becomes a shape.

  In the present invention, if the nozzle has two sets of two plates that are identical to each other and is a combination of four such plates, a nozzle that exhibits the above-described effects can be realized by a simple assembly operation. Can do.

  In the present invention, the introduction pipe is connected to the nozzle in a suspended state, and includes at least a mechanism for rotating the nozzle around its axis, and an axis around the axis orthogonal to the axis. If a mechanism for rotating the workpiece is provided, fine adjustment of the coolant supply in the vertical and horizontal directions of the workpiece can be realized by a simple nozzle operation by the user.

  In this case, if the introduction pipe is a U-shaped pipe formed by combining four elbows, the shape of the introduction pipe can be changed in a complex manner regardless of the simple configuration. It can be realized with higher accuracy.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  1A to 1C are a front view, a left side view, and a bottom view, respectively, of the coolant supply apparatus 10 according to one embodiment of the present invention shown in orthographic projection, and FIG. FIGS. 7A and 7B are a perspective view showing a nozzle 12 described later according to the present embodiment from the plane side and a perspective view showing the bottom surface side, respectively.

  In the following description, reference is made to FIG. 7, and the same parts as those in FIG.

  In FIG. 1, reference numeral 11 denotes an introduction pipe that guides a coolant supplied to a workpiece during thread grinding. The introduction pipe 11 is a U-shaped pipe in which four elbows 11a are combined through a pipe 11b. In the present embodiment, the four elbows 11a each select a low pressure elbow as the three elbows 11a sequentially arranged from the introduction side of the coolant, and only the elbow 11a connected to the nozzle 12 described later selects the high pressure elbow.

  Each of the elbow 11a and the piping pipe 11b is rotatably connected by, for example, a mechanism constituted by screw portions that engage with each other. Thereby, the position of the elbow 11a and the piping pipe 11b can be finely adjusted.

Thus, the inlet pipe 11 itself, it is possible to rotate about the rotation (arrow θx direction) parallel axis Ox around its axis O ₁ and the axis O _1, the nozzle 12 relative to the axis Ox It can be rotated around an orthogonal axis Oy direction (arrow θy direction).

Reference numeral 12 denotes a nozzle connected to the introduction pipe 11. The nozzle 12 is composed of two identical surfaces 13 having long sides and two identical surfaces 14 having short sides, and these surfaces 13 and 14 are perpendicular to each other as shown in FIG. connected with, on its inside, an internal passage R through which the coolant C _L sent from the inlet pipe 11, the four corners C is formed so as to form a right angle.

  In addition, each of the two long surfaces 13 is provided with symmetrically inclined portions 13a that approach each other as they approach the discharge port 15 that allows the internal passage R to communicate with the outside. The discharge port 15 is formed in a rectangle whose four corners C form a right angle.

Here, FIG. 3 (a), (b), respectively, upon threaded grinding shaft end G _s of the pinion reduction G, with respect to the rotation axis O of the state grindstone W when using the coolant supply device 10 FIG. 2 is a schematic diagram showing from a direction orthogonal to each other, and FIG.

According to the coolant supply device 10, a high coolant C _L of the pressure can be supplied to the entire region of the contact surface F of mating and the shaft end G _s and the grindstone W.

Furthermore, FIG. 4 (a), (b), respectively, schematic views illustrating the state of supply of the coolant C _L by the nozzle 12 according to the present embodiment and, cooling by conventional long hole nozzle 32 outlet is long hole it is a schematic view illustrating the state of supply of agent C _L.

As shown in FIG. 6 (a), according to the nozzle 12 according to the present embodiment, while the contact surface F of the shaft end G _s and the grindstone W is substantially linear, the coolant C _L discharge port to be injected without kinking 15, the supply area of the coolant C _L covers the entire contact surface F as shown by the broken line a.

On the other hand, according to the conventional long hole nozzle 32, since the four corners of the outlet 35 is charged with R or some rounded rather than right angle, as shown in FIG. (B), the coolant C _L discharge port Since it is injected with twisting from 35, the supply region of the coolant C _L is deviated from the contact surface F as indicated by a broken line B.

That is, according to one embodiment a is coolant supply apparatus 10 of the present invention, since the high coolant C _L of the pressure can be appropriately supplied to the shaft end G _s, grinding at the shaft end G _s with cooling failure Burning is prevented and the life of the grindstone W can be extended.

In addition, in this case, it is not necessary to visually inspect the processed shaft end portion G _s , and the production process can be simplified.

  Further, according to the coolant supply device 10, since cooling can be appropriately performed, it is not necessary to lengthen the processing time for each pinion reduction G in consideration of grinding burn, and therefore the processing time can be shortened. In addition, by shortening the machining time, the life of other tools represented by a rotary dress or the like can be extended.

The above-described effect is that the nozzle 12 according to the present invention has two sets of a pair of two surfaces 13 that are identical to each other and a pair of two surfaces 14 that are identical to each other, and these four surfaces are connected to each other at right angles. since it obtained by forming an internal passage R inside, in a coolant C _L the to flows through the internal passage R while equally interfere with each other, respectively the rear surface 14f of the rear surface 13f and the surface 14 of the face 13 passage R turbulence hardly occurs, moreover, each of the two surfaces 13, since the provision of the mutually symmetrical inclined portion 13a approaching toward the discharge port 15, the coolant C _L by the outlet 15 side is the aperture The turbulent flow in the passage R hardly occurs even when the pressure is increased, and the discharge port 15 is formed in a quadrangle whose four corners C form a right angle. Thus, like the conventional nozzle 32, the four corners of the discharge port 35 are formed. Because twisting does not occur when coolant is discharged due to roundness A.

  By the way, according to the present invention, the nozzle 12 can be manufactured by cutting or the like from a solid square or the like, but the surface 13 and the surface 14 are respectively the same two plates 13 ′ and plates. It is preferable to combine the plates 13 'and 14' as 14 '.

  Here, FIG. 5 (a) is a front view and a right side view when a later-described front plate (back plate) 13 'constituting the nozzle 12 is shown by orthographic projection, and FIG. ) Are a front view and a right side view when a later-described right side plate (left side plate) 14 ′ constituting the nozzle 12 is shown by orthographic projection.

  As a specific example, for example, as shown in FIG. 5, an edge 13 ′ e (a broken line portion and a surface shown in FIG. 5) extending along the longitudinal direction of the back surface 13 ′ f of the front plate (back plate) 13 ′. 13) and the side surface 14 ′s of the right side plate (left side plate) 14 ′ are welded.

  As described above, if the nozzle 12 is formed by combining the four plates 13 'and 14', the nozzle 12 having the above-described effects can be realized by a simple assembly operation. In manufacturing the plates 13 'and 14', ready-made plate steel materials may be used as they are, but the back surfaces 13'f and 14'f of the plates 13 'and 14' are made using an abrasive such as a buff. It is preferable to subject the surface to a surface treatment.

Further, as shown in FIG. 1, the introduction pipe 11 according to the present invention is connected to a state in which the nozzle 12 is suspended, and at least a fine adjustment mechanism that rotates the nozzle 12 around its axis O ₁ ; because they have a fine adjustment mechanism for rotating the axis Oy around orthogonal the nozzle 12 relative to the axis O _1, the coolant C _L in the vertical direction of the pinion reduction G (radial) and horizontal direction (axial direction) Fine adjustment to the supply can be realized by a simple nozzle operation by the user.

In addition, in the case of this embodiment, since the introduction pipe 11 is a U-shaped pipe that is a combination of four elbows 11a, the shape of the introduction pipe 11 can be changed in a complicated manner regardless of the simple configuration, and thus the coolant. the fine adjustment for the supply of C _L can be achieved with higher accuracy.

  By the way, according to the present invention, the four surfaces 13 and 14 (plates 13 ′ and 14 ′) can be the same surface (plate).

  Here, FIGS. 6A and 6B are a perspective view and a bottom view, respectively, schematically showing the other nozzle 22 according to the present invention from the bottom side when shown in orthographic projection.

  According to the nozzle 22 of the present invention, the four surfaces are formed of the same surface 23, and the inclined surfaces 23a that are close to each other as they approach the discharge port 25 are provided on these surfaces 23, respectively. Is formed into a square with four corners C forming a right angle.

Also in this case, if the four corners of the discharge port 25 are not right angles but rounded or slightly rounded, the coolant C _L is twisted from the discharge port 25 in the same manner as described in FIG. while being, according to the nozzle 22 according to this embodiment, similar to that described in FIG. 4 (a), the coolant C _L is injected without kinking from the discharge port 25.

  The above description exemplifies a preferred embodiment of the present invention, but various modifications can be made by those skilled in the art within the scope of the claims. For example, each configuration and technical idea adopted in each of the above-described forms are, for example, the same form or the form described in FIG. 6 on the two surfaces 14 according to the form described in FIGS. Adopting the configuration of such an inclined portion, or as shown in FIG. 5, the nozzle 22 is composed of four plates and assembled by welding or the like, as described in FIG. , Changes, diversions, or combinations.

  The present invention is not limited to grinding, and can be applied to general machining that involves supplying a coolant, such as cutting and rolling.

(a)-(c) is the front view, left side view, and bottom view when the coolant supply apparatus which is one form of this invention is shown by orthographic projection. (a), (b) is the perspective view shown from the plane side, and the perspective view shown from the bottom side, respectively, when the nozzle which concerns on the same form is shown by orthographic projection. (a), (b) is a schematic diagram showing the state when using the coolant supply device of the same form from the direction orthogonal to the rotation axis of the grindstone when thread grinding on the shaft end of the pinion reduction, respectively. FIG. 6 is a schematic diagram showing from a direction along the rotation axis. (a), (b) is the schematic diagram which illustrates the supply state of the coolant by the nozzle which concerns on the same form, respectively, and the schematic diagram which illustrates the supply state of the coolant by the conventional long hole nozzle. (a) is a front view and a right side view when the front plate (back plate) constituting the nozzle of the same form is shown in orthographic projection, and (b) is a nozzle of the same form. It is the front view and right view when a right side plate (left side plate) which comprises is shown by orthographic projection. (a), (b) is the perspective view and bottom view which show typically the other nozzle based on this invention from the bottom face side, when shown by orthographic projection. It is a schematic diagram which illustrates the apparatus for thread grinding a workpiece, and the conventional coolant supply apparatus used in thread grinding.

Explanation of symbols

10 Coolant supply device
11 Introduction pipe
11a High pressure elbow
11b Piping pipe
12 nozzles
13 Long side
13´ front plate, back plate
13a Slope
14 Short side
14´ right side plate, left side plate
15 outlet
22 nozzles
23 faces (plate)
23a Inclined part C Outlet corner R Internal passage

Claims (5)

An introduction pipe for guiding a coolant supplied to the workpiece in machining, and a nozzle having an internal passage through which the coolant sent from the introduction pipe passes and formed with a discharge port for communicating the internal passage to the outside. A coolant supply device for machining, comprising:
The nozzle has two sets of two surfaces that are identical to each other, and these four surfaces are connected to each other at right angles to form the internal passage inside thereof.
A coolant supply device for machining, wherein at least one pair of surfaces is provided with inclined portions that are symmetrical to each other as they approach the discharge port, and the discharge port is formed in a quadrangle having four right corners. . In claim 1, the four surfaces are composed of two identical surfaces having long sides and two identical surfaces having short sides,
A coolant for machining, wherein two long surfaces are provided with symmetrically inclined portions that approach each other as they approach the discharge port, and the discharge port is formed in a rectangular shape having four right angles. Feeding device.   3. The coolant supply device for machining according to claim 1, wherein the nozzle has two sets of two plates that are identical to each other and is a combination of the plates.   4. The introduction pipe according to claim 1, wherein the introduction pipe is connected in a state where the nozzle is suspended, and at least a mechanism for rotating the nozzle around an axis parallel to the axis thereof, and the nozzle A coolant supply device for machining, characterized in that it has a mechanism for rotating the shaft around an axial direction orthogonal to an axis parallel to the axis.   5. The coolant supply device for machining according to claim 4, wherein the introduction pipe is a U-shaped pipe in which four elbows are combined.

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