Processing device

Abstract

To provide a processing device that can clean the inside of a collet chuck, while suppressing cleaning liquid from flowing into a depth part of a spindle.SOLUTION: A processing device comprises a cleaning unit that cleans a collect chuck. The cleaning unit comprises a nozzle 11b erected upward and provided with a blow-out port 11e which blows out cleaning liquid, and a regulating part 11c2, positioned upper than the blow-out port 11e of the nozzle 11b, which is inserted together with the nozzle 11b into the collet chuck from below when cleaning the collet chuck. The regulating part 11c2 regulates upward flowing of the cleaning liquid, by contacting the cleaning liquid blown out from the blow-out port 11e.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a processing device.

Background Art

[0002] Conventionally, processing devices equipped with a cleaning unit for cleaning chips and the like adhering inside a collet chuck have been devised (see Patent Documents 1 and 2). The cleaning units of these Patent Documents 1 and 2 are provided with a nozzle having a blowing outlet for blowing out a cleaning liquid, compressed air, etc. This nozzle is inserted inside the collet chuck, and by blowing out the cleaning liquid or compressed air, it is configured to clean the chips adhering inside the collet chuck.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when a cleaning liquid or the like is ejected vigorously inside the collet chuck, the cleaning liquid may flow along the wall portion and reach the inner part of the spindle of the spindle. Then, for example, there is a risk of a problem that the grease of the disc spring for closing the collet chuck is washed away by the flowing-in cleaning liquid.

[0005] Therefore, an object of the present invention is to provide a processing device capable of cleaning the inside of a collet chuck while suppressing the inflow of the cleaning liquid to the inner part of the spindle.

Means for Solving the Problems

[0006] One aspect of the present invention includes a spindle having a rotationally driven rotor shaft and a collet chuck provided at the tip of the rotor shaft for holding a tool, and a cleaning unit for cleaning the collet chuck. The cleaning unit is erected upward and whose tip is open a blowout port for ejecting a cleaning liquid is formed and a nozzle. Above the blowout port of the nozzle at there is Kino a baffle a brush portion that extends radially with respect to the axial direction and the brush portion baffle is arranged so as to overlap the blowout port when viewed from the axial direction of the nozzle, and the contacts the cleaning liquid ejected from the blowout port by and restricts the upward flow of the cleaning liquid. The processing apparatus is characterized by this.

Advantages of the Invention

[0007] According to the present invention, it is possible to clean the inside of the collet chuck while suppressing the inflow of the cleaning liquid into the inner part of the spindle.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0009] Hereinafter, a drilling apparatus as a processing apparatus according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the X-axis direction, Y-axis direction, and Z-axis direction are based on the state when the processing object is viewed in a plan view.

[0010] <Schematic Configuration of Drilling Machine> As shown in FIG. 1, the processing apparatus 1 according to the present embodiment is a drilling machine that performs drilling on a printed circuit board W as a processing target, and includes a base 2, a processing table 3 supported by the base 2 so as to be movable in the X-axis direction, and a spindle 5 that performs drilling on the printed circuit board W placed on the processing table 3. The spindle 5 is supported via a cross slide 7 by a gantry column 6 installed on the base 2 so as to straddle the processing table 3. Specifically, the cross slide 7 is attached to the vertical surface of the gantry column 6 so as to be movable in the Y-axis direction. Further, the spindle 5 is attached to the cross slide 7 so as to be movable in the Z-axis direction. Furthermore, on the processing table 3, a supply tool post 8, a discharge tool post 9, a drill cassette 10 for separately storing new drills and old drills, a cleaning unit 11, and the like are provided.

[0011] The processing apparatus 1 also includes a control unit 12 having a storage unit storing various control programs used in drilling and a calculation unit such as a CPU. When performing drilling on the printed circuit board W, the processing apparatus 1 controls a drive device (not shown) that moves the processing table 3 in the X-axis direction and a drive device (not shown) that moves the cross slide 7 in the Y-axis direction by the control unit 12 to position the drill 13 of the spindle 5, and in this state, controls a drive device (not shown) that moves the spindle 5 in the Z-axis direction to lower the spindle 5 and perform drilling on the printed circuit board W.

[0012] When replacing the drill 13 of the spindle 5, similarly, the positions of the processing table 3 and the spindle 5 are controlled to remove the drill 13 at the discharge tool post 9, supply a new drill to the supply tool post 8 using a sub-chuck 15 attached to the spindle 5, and attach the new drill prepared at the supply tool post 8 to the spindle 5.

[0013] <Configuration of Spindle> Next, regarding the configuration of the spindle 5, an explanation will be given centering on the configuration around the collet chuck 51 that holds the tool. As shown in Fig. 2, the spindle 5 includes a rotor shaft 52 as a main shaft and a coil (not shown) for rotationally driving the rotor shaft 52. The rotor shaft 52 is configured to be rotationally driven when a driving current is supplied to the coil.

[0014] Further, the rotor shaft 52 is provided in a hollow shape, and a collet chuck 51 for holding the drill 13 is provided at its tip. Specifically, an opening 52a1 for inserting the collet chuck (collet) 51 is formed along the rotation axis O at the nose 52a which is the tip of the rotor shaft 52, and this opening 52a1 communicates with the disc spring accommodation space 52b. Also, the inner peripheral surface of the nose 52a is a female tapered surface 52a2 that is inclined so that the inner diameter of the opening 52a1 becomes smaller in the direction away from the tip of the rotor shaft 52 along the rotation axis O (hereinafter referred to as the first direction), that is, toward the disc spring accommodation space 52b.

[0015] The above collet chuck 51 is formed by making a radial cut (slit) in a cylindrical member having a hole 51a for inserting a tool at the center. It includes a chuck portion 51b where the cut is made, and a rod portion 51c that is continuous with the chuck portion 51b in the first direction. The chuck portion 51b serves as a holding portion for holding the tool, and its outer peripheral surface is a male tapered surface 51b1 having the same angle as the tapered surface 52a2 of the rotor shaft 52. Also, the rod portion 51c is located in the disc spring accommodation space 52b when the collet chuck 51 is inserted into the rotor shaft 52, and a guide bush 51d is attached to the end thereof. The disc spring accommodation space 52d is formed as a bottomed hole, and a disc spring 53 is provided between the bottom 52b1 of the disc spring accommodation space 52b and the guide bush 51d. Due to the biasing force of this disc spring 53, the collet chuck 51 is biased and pulled upward in the first direction (upward in FIG. 2), the tapered surface 51b1 engages with the tapered surface 52a2 of the rotor shaft 52 and is tightened, and the chuck portion 51b elastically deforms in the inner diameter direction to hold the shank of the drill 13. Note that a notch portion 51b2 where a part of the tapered surface 51b1 is cut out is formed on the outer peripheral surface of the chuck portion 51b where the tapered surface 51b1 is formed.

[0016] <Configuration of the cleaning unit> Next, the configuration of the above cleaning unit 11 will be described. As shown in FIG. 3, the cleaning unit 11 includes a pedestal 11a supported by the processing table 3, a nozzle 11b erected upward from the pedestal 11a, and a brush 11c attached to the tip of the nozzle 11b. Flow paths 11d through which air and a cleaning agent pass are formed inside the pedestal 11a and the nozzle 11b, respectively, and an air and cleaning agent outlet 11e communicating with the flow path 11d is formed at the tip (upper end) of the nozzle 11b.

[0017] The brush 11c is supported by the pedestal 11a, and includes a shaft portion 11c1 that protrudes from the blowing outlet 11e through the flow path 11d, and a brush portion 11c2 that is spirally wound around the shaft portion 11c1 protruding from the blowing outlet 11e. The brush portion 11c2 is formed of a flexible member and is formed to have the same diameter as the shank of the drill 13 held by the collet chuck 51 or a larger diameter than the shank of this drill. That is, the brush portion 11c2 is formed to have the same diameter as or a larger diameter than the hole 51a for inserting the tool of the collet chuck 51, and when inserted into the hole 51a of the collet chuck 51 together with the nozzle 11b, it is in sliding contact with the inner peripheral surface 51a1 (see FIG. 2) of the collet chuck 51. The circular nozzle 11b is formed to have a smaller diameter than the diameter of the hole 51a of the collet chuck 51 and is not in contact with the inner peripheral surface 51a1 of the collet chuck 51.

[0018] Next, the cleaning operation of the collet chuck 51 by the cleaning unit 11 will be described. For example, when replacing the drill 13 of the spindle 5 with a new drill, before the processing apparatus 1 removes the old drill from the collet chuck 51 and attaches the new drill of the supply tool post 8 to the spindle 5, the processing table 3 and the cross slide 7 are moved to align the brush 11c and the nozzle 11b of the cleaning unit 11 with the hole 51a of the collet chuck 51, and in this state, the spindle 5 is lowered to insert the brush 11c and the nozzle 11b into the collet chuck 51.

[0019] As shown in FIG. 4, when the brush 11c and the nozzle 11b are inserted into the collet chuck 51, the control unit 12 controls a drive device (not shown) of the cleaning unit 11 to eject cleaning liquid and air from the tip of the nozzle 11b for a predetermined time from a blowout port 11e provided at the tip of the nozzle. Then, as indicated by the arrow X1 in the figure, the cleaning liquid blows upward from the blowout port 11e and contacts the brush portion 11c2 of the brush 11c that radially expands in a flange shape. As shown in the enlarged view of part B in FIG. 4, this brush portion 11c2 is in contact with the inner peripheral surface 51a1 of the collet chuck 51, and since there is no radial gap between the inner peripheral surface 51a1, the cleaning liquid that contacts the brush portion 11c2 has its upward flow restricted, and a pool of cleaning liquid is formed at the lower surface portion of this brush portion 11c2.

[0020] Then, the cleaning liquid in this pool of cleaning liquid flows downward through the gap between the nozzle 11b and the inner peripheral surface 51a1 of the collet chuck 51 to clean foreign matter such as chips adhering to the inner peripheral surface 51a1 of the collet chuck 51. Also, the cleaning liquid in the pool of cleaning liquid flows into the gap between the outer peripheral surface 51b1 of the collet chuck 51 and the inner peripheral surface 52a2 of the rotor shaft 52 through the slit of the chuck portion 51b of the collet chuck 51 to clean the foreign matter between the collet chuck 51 and the rotor shaft 52.

[0021] By the way, as shown in FIG. 5, even if the nozzle of the cleaning unit does not have a brush and the blowout ports for the cleaning liquid and air are provided on the side surface instead of at the tip of the nozzle, as shown in FIG. 6, there is nothing to inhibit the upward flow of the cleaning liquid ejected from the blowout port. For this reason, as shown in FIG. 6, particularly in the enlarged view of part A, the cleaning liquid flows as indicated by the arrow X2, travels along the wall surface, and a part of it may flow upward and flow into the inside of the rotor shaft 52, for example, the disc spring accommodation space 52b.

[0022] On the other hand, in the case of the present embodiment, when the brush 11c of the cleaning unit 11 is above the outlet 11e of the nozzle 11b and at least its lower end is inserted into the collet chuck 51, it is located below the disc spring accommodation space 52b. Further, the brush portion 11c2 extending in the radial direction faces the outlet 11e opening upward in the axial direction of the nozzle 11b, and serves as a regulating portion that contacts the cleaning liquid ejected from the outlet 11e during cleaning of the collet chuck 51 to regulate the upward flow of the cleaning liquid. For this reason, a cleaning liquid pool is formed on the lower surface of the brush portion 11c2 of the brush 11c, and the cleaning liquid whose upward flow is regulated flows downward by gravity and can clean the inside of the collet chuck 51 and the nose 52a of the rotor shaft 52 without flowing into the inner part of the rotor shaft 52.

[0023] In addition, since it becomes difficult for the cleaning liquid to flow into the inner part of the rotor shaft 52 such as the disc spring accommodation space 52b, in the present embodiment, it is possible to prevent the grease of the disc spring 53, which is a biasing member that applies a holding force of a tool such as a drill to the collet chuck 51, from being washed away by the cleaning liquid. For this reason, the collet chuck 51 can be cleaned while suppressing the influence on other parts, and the collet chuck 51 can be operated properly.

[0024] In the above-described embodiment, the outlet 11e is provided at the tip of the nozzle 11b. However, the present invention is not limited to this, and an outlet may be provided on the side surface of the nozzle 11b. In this case, it is desirable that the outlet be provided at a position facing the inner peripheral surface 51a1 of the collet chuck 51. Further, the collet chuck 51 may obtain a tightening force for holding the tool by a biasing member other than the disc spring, and furthermore, the chuck portion may be closed by another tightening mechanism in addition to the biasing member. Also, the collet chuck 51 can hold various tools other than the drill.

Description of Reference Numerals

[0025] 1: Processing apparatus 5: Spindle 11: Cleaning unit 11b: Nozzle 11c2: Regulation part (brush part) 11e: Outlet 51: Collet chuck 52: Rotor shaft

Claims

1. A spindle comprising a rotatably driven rotor shaft, and a collet chuck provided at the tip of the rotor shaft for holding a tool, and a cleaning unit for cleaning the collet chuck, wherein the cleaning unit comprises a nozzle that stands upright upward and has a blowout port formed at its tip for ejecting a cleaning liquid, and a brush portion that extends radially with respect to the axial direction of the nozzle above the blowout port of the nozzle, the brush portion is arranged so as to overlap the blowout port when viewed from the axial direction of the nozzle, and abuts against the cleaning liquid ejected from the blowout port to regulate the upward flow of the cleaning liquid, characterizing a processing apparatus.

2. the brush portion is configured to be in sliding contact with the inner peripheral surface of the collet chuck when inserted into the collet chuck from below, and a cleaning liquid pool is formed in the lower surface portion of the brush portion when the cleaning liquid is ejected, characterizing the processing apparatus according to claim 1.

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