Cover device

Abstract

The cover device (2) includes a base (10), a first cover (12), and a second cover (14). The base (10) is disposed on the machine body (5) of a rotary machining machine (1). The rotary machining machine (1) has a rotating part (8) that rotates about an axis (C) extending in the front-rear direction. The first cover (12) is disposed on the base (10) via a connecting part (11) and covers the rotating part (8). The second cover (14) is disposed on the first cover (12) in the front-rear direction via an axial sliding mechanism (13). The connecting part (11) supports the first cover (12) in a way that can be extended radially outward from the rotating part (8).

Description

Technical Field

[0001] This disclosure relates to a cover device for a rotary machining machine that rotates a workpiece or cutting tool to perform machining of the workpiece. Background Technology

[0002] For example, in rotary machining, which uses a cutting tool to perform cutting operations like a boring machine, the cutting tool is rotated in an exposed state to machine the part.

[0003] Furthermore, even in rotary machining centers like lathes, where the workpiece is rotated, the rotating workpiece remains exposed.

[0004] Generally, in rotary machining centers, there are no covers covering the rotating parts such as the cutting tool or the workpiece. Even if there are, they are either jump-up or rotary sliding types.

[0005] Prior technology documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Publication No. 3153369

[0008] Patent Document 2: Japanese Patent Publication No. 49-069894 Summary of the Invention

[0009] The technical problem that the invention aims to solve

[0010] Furthermore, for safety, a cover with a rotating body is preferred.

[0011] However, when a pop-up cover is positioned around the rotating body, lifting the cover during tool changes becomes difficult. Furthermore, the range of the cover over the rotating body cannot be adjusted according to operation or tool, potentially compromising operability.

[0012] Therefore, this disclosure was made in view of the above circumstances, and its object is to provide a cover device that improves operability.

[0013] Technical means for solving technical problems

[0014] According to one aspect of this disclosure, a cover device is provided, characterized in that it comprises:

[0015] The base is disposed on the machining body of a rotary machining machine, which has a rotating part that rotates about an axis extending in the front-rear direction.

[0016] The first cover, which is disposed on the base via a connecting portion, and covers the rotating portion, and

[0017] The second cover is disposed on the first cover in the front-rear direction by means of an axial sliding mechanism;

[0018] The connecting portion supports the first cover so that it extends radially outward from the rotating portion.

[0019] Preferably, the base includes a fixed base and a rotating base, the fixed base being disposed on the rotary machining machine, and the rotating base being disposed on the fixed base in a circumferential direction along a circle centered on the axis;

[0020] The first cover is disposed on the rotating base via the connecting portion.

[0021] Preferably, the rotating base is supported to slide between a circumferentially shielded position and a circumferentially open position, wherein the circumferentially shielded position is the position of the first cover above and to the left of the axis in the circumferential direction, and the circumferentially open position is the position of the first cover below and to the right of the axis in the circumferential direction.

[0022] The fixed base has a circumferential blocking stop and a circumferential opening stop. The circumferential blocking stop locks the rotating base in the circumferential blocking position and the circumferential opening stop locks the rotating base in the circumferential opening position.

[0023] Preferably, at least one of the first cover and the second cover is formed as a grid extending in the front-rear direction and circumferentially extending along a circle centered on the axis.

[0024] Preferably, the connecting portion supports the first cover so that it can be unfolded upwards.

[0025] Invention Effects

[0026] According to the above scheme, the possibility of damaging operability can be suppressed. Attached Figure Description

[0027] Figure 1 This is a perspective view of a cover device according to one embodiment of the present disclosure.

[0028] Figure 2 yes Figure 1 A-A line sectional view.

[0029] Figure 3 yes Figure 2 Sectional view along line B-B.

[0030] Figure 4 yes Figure 3 The C-C line sectional view.

[0031] Figure 5It is a three-dimensional view of the shield device with the shield shortened.

[0032] Figure 6 yes Figure 5 The D-D line sectional view.

[0033] Figure 7 This is a three-dimensional diagram of a cover device that rotates the cover with the rotating body as the center.

[0034] Figure 8 yes Figure 7 Sectional view along the E-E line.

[0035] Figure 9 This is a three-dimensional diagram of a cover device that makes the cover jump upwards.

[0036] Figure 10 yes Figure 9 Sectional view along the F-F line. Detailed Implementation

[0037] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. Furthermore, in the embodiments described later, the directions of front, back, left, right, up, and down are taken as the front end direction of the rotating part of the rotary machining center, and are used as a reference. However, these directions are used only for ease of explanation and represent the relative positional relationships between the components described later.

[0038] Figure 1 This is a perspective view of the cover device 2 installed on the rotary machining machine 1. Figure 2 yes Figure 1 A sectional view along line A-A. First, the rotary machining machine 1 with regard to the application cover device 2 will be described.

[0039] like Figure 1 As shown, the rotary machining center 1 is, for example, a horizontal jig boring machine. The rotary machining center 1 includes: a worktable 4 for holding a workpiece 3; and a machining center body 5 for performing cutting operations on the workpiece 3 on the worktable 4. The worktable 4 is slidably mounted on a base (not shown) in the front-back and left-right directions. The machining center body 5 includes: a fixed body 6 fixed to a floor (not shown); a movable body 7 movably mounted on the fixed body 6 in the front-back direction; and a rotating part 8 rotatably mounted on the movable body 7 about an axis C extending in the front-back direction.

[0040] The rotating part 8 is formed such that the front end of the main body shaft 7a, which extends forward from the movable main body 7, extends forward. A tool 9 is detachably held in the rotating part 8. The types of tools 9 that can be detachably attached to and detached from the rotating part 8 include boring tools, end mills, face mills, drills, etc. The tool 9 is appropriately selected according to the type of machining performed by the rotary machining machine 1. Furthermore, the main body shaft 7a is formed as a circular cross-section coaxial with the shaft C. The operator's standing position relative to the rotary machining machine 1 of this embodiment is formed to the left of the rotating part 8. That is, the operator operates from the left position of the rotating part 8.

[0041] Furthermore, the rotary machining machine 1 is not limited to the rotary machining machine 1 described above. The rotary machining machine 1 can be any machine that has a rotating part 8 that rotates about an axis C extending in the front-rear direction; for example, it can be a lathe. In this case, the workpiece to be cut is held in the rotating part 8.

[0042] Furthermore, for safety, it is preferable to have a cover that covers the rotating part 8 and the cutting tool 9.

[0043] However, with a cover (not shown) surrounding the rotating part 8 and the cutting tool 9, lifting the cover during cutting tool 9 switching is difficult. Furthermore, the inability to adjust the area covering the rotating part 8 and the cutting tool 9 according to operation or the cutting tool may impair operability.

[0044] Therefore, in this embodiment, the cover device 2, described later, is provided on the rotary machining machine 1. This improves operability. The cover device 2 will now be described.

[0045] The cover device 2 includes: a base 10 which is detachably disposed on the main body shaft portion 7a; a first cover 12 which is disposed on the base 10 via a connecting portion 11; and a second cover 14 which is disposed on the first cover 12 via an axial sliding mechanism 13.

[0046] like Figure 2 and Figure 3 As shown, the base 10 includes: a fixed base 15 disposed on the main body shaft 7a; and a rotating base 16 disposed on the fixed base 15 in a circumferential direction that can slide freely along a circle centered on the axis C.

[0047] The fixing base 15 is formed in an annular shape and is coaxially fixed to the outer periphery of the main body shaft portion 7a. Furthermore, the fixing base 15 includes an inner peripheral portion 17 and an outer peripheral portion 18. The outer peripheral portion 18 is formed as a plate of uniform thickness, and its thickness in the front-to-back direction is thinner than that of the inner peripheral portion 17. Furthermore, an outer peripheral surface 17b of the inner peripheral portion 17 is formed between the front surface 17a of the inner peripheral portion 17 and the front surface 18a of the outer peripheral portion 18. The outer peripheral surface 17b of the inner peripheral portion 17 is formed at right angles to both the front surface 17a of the inner peripheral portion 17 and the front surface 18a of the outer peripheral portion 18. Furthermore, a slit 19 is formed in the outer peripheral portion 18 for guiding the rotating base 16. The slit 19 is formed as an arc shape coaxial with the fixing base 15. That is, the slit 19 extends circumferentially along a circle centered on axis C.

[0048] The rotating base 16 is formed as an arc coaxial with the fixed base 15 and has a rectangular cross-section. The radius Ri1 of the inner circumferential surface of the rotating base 16 is set to be slightly larger than the radius Ri2 of the outer circumferential surface 17b of the inner circumferential portion 17, and the radius Ro1 of the outer circumferential surface of the rotating base 16 is set to be approximately the same as the radius Ro2 of the outer circumferential portion 18. Figure 3 and Figure 4 As shown, a plurality of guide pins 20 (three in this embodiment) are rotatably and circumferentially arranged in the rotating base 16, and these guide pins 20 are guided by the slit 19. Furthermore, the rotating base 16 is formed in an arc shape, but is not limited thereto. For example, the rotating base 16 may also be formed in an annular shape coaxial with the fixed base 15.

[0049] The guide pin 20 includes: a pin shaft portion 21 inserted into the slit 19; and a pin head 22 integrally disposed at the rear end of the pin shaft portion 21. Figure 3 and Figure 8 As shown, the pin portion 21 guides the movement of the rotating base 16 by moving along the slit 19. Furthermore, the pin portion 21 limits the range of movement of the rotating base 16 by contacting its end in the extending direction of the slit 19. Thus, the rotating base 16 is stopped at a predetermined position. Specifically, the predetermined position refers to the circumferentially shielded position of the first cover 12 above and to the left of axis C (see reference). Figure 1 and Figure 3 ), and the position of the first cover 12 in the circumferential direction is the circumferential open position below and to the right of axis C (refer to Figure 7 and Figure 8 That is, at one end of the slit 19, a circumferential blocking stop 23 is formed, which stops the rotating base 16 in the circumferential blocking position, and at the other end of the slit 19, a circumferential opening stop 24 is formed, which stops the rotating base 16 in the circumferential opening position.

[0050] In addition, such as Figure 4 As shown, a bearing 25 is provided at the front end of the pin portion 21. The bearing 25 is a radial bearing. The bearing 25 includes: an inner ring 26, which is fixed to the outer periphery of the pin portion 21; an outer ring 27, which is disposed on the outer periphery of the inner ring 26; and a plurality of balls 28, which are disposed between the inner ring 26 and the outer ring 27. The outer peripheral surface 27a of the outer ring 27 abuts against the outer peripheral surface 17b of the inner peripheral portion 17. Thus, when the pin portion 21 moves along the slit 19, the bearing 25 moves along the outer peripheral surface 17b of the inner peripheral portion 17. As a result, the rotating base 16 slides smoothly relative to the fixed base 15.

[0051] The pin head 22 is formed into a disk shape with a larger diameter than the pin shaft portion 21 and abuts against the rear end face 18b of the outer peripheral portion 18. The pin head 22 functions as an anti-disengagement element by abutting against the rear end face 18b. As a result, the forward movement of the rotating base 16 relative to the fixed base 15 is restricted.

[0052] like Figure 1 and Figure 2 As shown, the first cover 12 is used to cover the rotating part 8 and the tool 9 held by the rotating part 8, and is formed as a grid extending forward (axially) from the rotating base 16 and circumferentially along a circle centered on axis C. Specifically, the first cover 12 includes: a plurality of rod members 12a extending parallel to each other axially; a base end side support frame 12b spanning between the base ends of these rod members 12a; and a front end side support frame 12c spanning between the front ends of the rod members 12a. The base end side support frame 12b and the front end side support frame 12c are formed in an arc shape and are formed in a rectangular cross section. The inner diameter and outer diameter of the base end side support frame 12b and the front end side support frame 12c are set to be approximately the same as those of the rotating base 16. Furthermore, the front-rear length L1 of the first cover 12 is set to be shorter than that of the tool 9 with the shortest axial length among the tools 9 that can be held by the rotating part 8. Therefore, when the cutting tool 9 is milling the workpiece 3 in front, it is possible to prevent the first cover 12 from becoming an obstacle.

[0053] Furthermore, the connecting part 11 is composed of a hinge with a brake (torque hinge). For example... Figure 9 and Figure 10 As shown, the connecting portion 11 supports the first cover 12 so that it can extend radially outward from the rotating portion 8. Specifically, the connecting portion 11 supports the first cover 12 so that it can jump up (extend upward) when the rotating base 16 is in the circumferentially shielded position. Furthermore, the connecting portion 11 is configured to hold the first cover 12 in a specific posture. Here, the specific posture refers to a shielding posture in which the front end and the base end of the first cover 12 are at approximately the same height (see reference). Figure 1), and the front end of the first cover 12 is positioned higher and further back than the base end in an open posture (refer to Figure 9 That is, when the rotating base 16 is in the circumferentially shielded position, the first cover 12 can switch to either the shielded posture or the open posture. In addition, the open posture can also be the posture in which the front end of the first cover 12 is vertically above the base end.

[0054] Furthermore, the first cover 12 can be locked by a locking mechanism 29, which is located at one end of the circumferential direction of the rotating base 16. Figure 3 As shown, the locking mechanism 29 includes: a locking base 30, which is provided forward at one circumferential end of the rotating base 16; a locking pin 31, which is configured to pass through the locking base 30 circumferentially along the rotating base 16; a spring (not shown), which is provided in the locking base 30 and elastically supports the locking pin 31 in a state protruding towards the base end side support frame 12b; and a pin hole 32, which is formed in the base end side support frame 12b and into which the locking pin 31 is inserted. When the locking pin 31 is inserted into the pin hole 32, the first cover 12 is locked in a shielding posture (see reference). Figure 1 When the locking pin 31 is pulled out of the pin hole 32, the first cover 12 can allow for a change in posture from the shielding posture.

[0055] like Figure 1 and Figure 2 As shown, the second cover 14 is used to cover the tool 9 held by the rotating part 8 and is disposed radially outside the first cover 12. The second cover 14 is formed as a grid extending forward (axially) and circumferentially extending along a circle centered on axis C. Specifically, the second cover 14 includes: a plurality of rod members 14a extending parallel to each other axially; a base end side support frame 14b spanning between the base ends of these rod members 14a; a front end side support frame 14c spanning between the front ends of the rod members 14a; and an intermediate support frame 14d spanning between the middle portions of the rod members 14a. The base end side support frame 14b, the front end side support frame 14c, and the intermediate support frame 14d are formed in an arc shape and are formed in a rectangular cross-section. The radius r2 of the inner circumferential surface of the base-side support frame 14b, the front-side support frame 14c, and the intermediate support frame 14d is set to be approximately the same as the radius r1 of the outer circumferential surface of the first cover 12. In addition, the front-rear length L2 of the second cover 14 is set to be approximately the same as the front-rear length L1 of the first cover 12.

[0056] Furthermore, the axial sliding mechanism 13 includes: a guide rail 33 spanning between the base-side support frame 12b and the front-side support frame 12c of the first cover 12; and a slider 34 disposed at the base end of the second cover 14 and movable along the guide rail 33. A pair of guide rails 33 are disposed separately in the first cover 12 along its circumference. The guide rails 33 are formed in a "C" shape and include a slit 33a for inserting the slider 34. The slider 34 spans between the base-side support frame 14b and the intermediate support frame 14d of the second cover 14 and is positioned in the circumference of the second cover 14 at a position corresponding to each guide rail 33. After being inserted into the guide rail 33, the slider 34 is engaged in a manner that prevents it from disengaging from the guide rail 33. Furthermore, the slider 34 is slidably pressed against the inner surface of the guide rail 33. Thus, when the slider 34 is subjected to a force F along the guide rail 33, it moves along the guide rail 33; when it is not subjected to the force F, it is locked by the frictional force from the inner surface of the guide rail 33. That is, the slider 34 is configured to move along the guide rail 33 and to lock at any position on the guide rail 33. However, the slider 34 is not limited to this. For example, the slider 34 may also include a locking mechanism that can freely disengage from the guide rail 33.

[0057] Next, the function of this embodiment will be described.

[0058] When the cutting tool 9, held by the rotating part 8, is used to mill the workpiece 3 placed on the worktable 4, such as Figure 1 and Figure 2 As shown, the rotating base 16 is positioned in a circumferentially shielded position, and the first cover 12 is set in a shielded posture. Then, the position of the second cover 14 in the front-rear direction is adjusted so that the front end of the second cover 14 is positioned further back than the front end of the tool 9. The axial sliding mechanism 13 can slide freely in the front-rear direction and can lockably support the second cover 14 at any position. Therefore, the length of the cover consisting of the first cover 12 and the second cover 14 can be freely adjusted according to the front-rear length of the tool 9 or the front-rear dimension of the workpiece 3. For example, when the front-rear length of the tool 9 is short, such as... Figure 5 and Figure 6 As shown, the second cover 2 is slid backward. This allows the tip of the cutter 9 to protrude forward from the front end of the second cover 14.

[0059] Then, while rotating the rotating part 8, the movable main body 7 moves forward. Milling begins when the cutting tool 9 contacts the workpiece 3. At this time, the rotating part 8 and the cutting tool 9 are covered above and to the left by the first cover 12 and the second cover 14. Therefore, accidental contact between the operator and the rotating part 8 or the cutting tool 9 is prevented or suppressed. Furthermore, because the first cover 12 and the second cover 14 are formed in a grid shape, they will not be soiled by oil or damaged by debris, as would be the case if the first cover 12 and the second cover 14 were made of transparent resin, thus preventing the area around the cutting tool 9 from becoming invisible. Therefore, the first cover 12 and the second cover 14 can maintain good visibility for a long period of time.

[0060] like Figure 7 and Figure 8 As shown, when switching the tool 9 to a larger or heavier tool, the locking pin 31 is inserted into the pin hole 32 while the rotating base 16 is rotated to the right. At this time, the pin shaft portion 21 of the guide pin 20 is guided along the slit 19, and the bearing 25 moves along the outer peripheral surface 17b of the inner peripheral portion 17. Therefore, the rotating base 16 rotates smoothly. Furthermore, since the pin shaft portion 21 of the guide pin 20 abuts against the circumferential opening stop 24, the rotating base 16 is stopped in the circumferentially open position. As a result, the upper and left sides of the rotating part 8 can be opened more fully. Moreover, even if the tool 9 is a large tool, it can be easily switched. In addition, even if the tool 9 is heavy and a crane (not shown) is required for switching, it is possible to prevent the first cover 12 and the second cover 14 from becoming obstacles to the hooking operation, and to prevent interference with the crane's lifting rope, etc.

[0061] like Figure 9 and Figure 10 As shown, when the tool 9 is manually switched, the second cover 14 is moved from... Figure 1 and Figure 2 Sliding the second cover 14 backwards, the locking pin 31 is pulled out of the pin hole 32, and the first cover 12 jumps up (rotates upwards) with the connecting part 11 as the center. At this time, because the second cover 14 is slid backwards, the maximum height H1 of the jump of the cover consisting of the first cover 12 and the second cover 14 can be suppressed, and the height H2 of the cover after jumping can be suppressed. As a result, the force required for the jump operation of the cover can be reduced. Furthermore, the first cover 12 will be in an open position with simple operation, and the top and left sides of the rotating part 8 will be opened. As a result, the tool 9 can be easily removed from the rotating part 8, and a new tool 9 can be easily installed on the rotating part 8.

[0062] Thus, the cover device 2 in this embodiment includes: a first cover 12, which is disposed on the base 10 via a connecting portion 11; and a second cover 14, which is slidably disposed on the first cover 12 along the axial direction via an axial sliding mechanism 13. Furthermore, the connecting portion 11 supports the first cover 12 so that it can expand radially outward from the rotating portion 8. Therefore, during machining, the position of the second cover 14 in the front-rear direction can be adjusted according to the length of the tool 9 in the front-rear direction or the dimension of the workpiece 3 in the front-rear direction, and the first cover 12 can be made open during tool switching. Therefore, the possibility of the cover device 2 impairing the operability of the cutting operation or tool switching operation can be suppressed.

[0063] The embodiments of this disclosure have been described in detail above, but this disclosure can also be implemented in other ways as follows.

[0064] (1) The base 10 is configured to include a fixed base 15 and a rotating base 16, but the rotating base 16 may be omitted as needed. In this case, the first cover 12 may be provided on the fixed base 15 via the connecting part 11.

[0065] (2) The fixed base 15 is set to be formed in a ring shape and provided on the main body shaft portion 7a, but is not limited thereto. The fixed base 15 can be provided on the main body portion supporting the rotating portion 8 (in this embodiment, it is the movable main body portion 7), for example, it can be formed in other shapes such as "U".

[0066] (3) The first cover 12 is configured to cover the rotating part 8 and the cutting tool 9, but is not limited thereto. The first cover 12 may also cover only the rotating part 8. In this case, the second cover 14 may be used to cover the cutting tool 9.

[0067] (4) The first cover 12 and the second cover 14 are configured to be formed in a grid shape, but are not limited thereto. The first cover 12 and the second cover 14 may also be formed of a transparent resin or the like, provided that oil or damage will not be applied to them. Alternatively, it may be possible, as needed, that only one of the first cover 12 and the second cover 14 is formed in a grid shape, while the other is formed of a transparent resin or the like.

[0068] (5) The first cover 12 and the second cover 14 are set to extend circumferentially along a circle centered on axis C, but are not limited thereto. For example, the first cover 12 and the second cover 14 may also be formed in an "L" shape in the main view.

[0069] (6) The second cover 14 is configured to be located radially outside the first cover 12, but it can also be configured to be located radially inside the first cover 12.

[0070] (7) The connecting part 11 is configured to hold the first cover 12 in a specific posture, but is not limited thereto. The connecting part 11 may be configured to hold the first cover 12 in any posture, or it may be a hinge without a braking function.

[0071] (8) The circumferential blocking stop 23 is formed at one end of the slit 19, and the circumferential opening stop 24 is formed at the other end of the slit 19, but is not limited thereto. The circumferential blocking stop 23 and the circumferential opening stop 24 may also be formed separately on the outer periphery 18. For example, the circumferential blocking stop 23 and the circumferential opening stop 24 may be formed by a protrusion that protrudes forward from the front surface 18a of the outer periphery 18.

[0072] (9) Alternatively, the rotary machining center 1 may be composed of other types of horizontal machining centers such as horizontal milling machines or horizontal drilling machines. In addition, the rotating part 8 may also hold the workpiece.

[0073] This application is based on Japanese Patent Application No. 2020-115819, filed on July 3, 2020, the contents of which are incorporated herein by reference.

[0074] Industrial availability

[0075] According to this disclosure, a cover device that improves operability can be provided.

[0076] Explanation of reference numerals in the attached figures

[0077] 1. Rotary machining center

[0078] 2. Cover device

[0079] 5. Main body of the processing machine

[0080] 8 Rotating part

[0081] 10 Base

[0082] 11 Connecting parts

[0083] 12th Cover

[0084] 13 Axial sliding mechanism

[0085] 14 Second Cover

[0086] C-axis

Claims

1. A cover device, characterized in that, include: The base is disposed on the machining body of a rotary machining machine, which has a rotating part that rotates about an axis extending in the front-rear direction. The first cover, which is disposed on the base via a connecting portion, and covers the rotating portion, and The second cover is disposed on the first cover in the front-rear direction by means of an axial sliding mechanism; The connecting portion supports the first cover so that it can unfold radially outward from the rotating portion. The base includes a fixed base and a rotating base. The fixed base is disposed on the rotary machining machine, and the rotating base is slidably disposed on the fixed base along a circumferential direction of a circle centered on the axis. The first cover is disposed on the rotating base via the connecting portion.

2. The cover device as claimed in claim 1, wherein, The rotating base is supported to slide between a circumferentially shielded position and a circumferentially open position, wherein the circumferentially shielded position is the position of the first cover above and to the left of the axis, and the circumferentially open position is the position of the first cover below and to the right of the axis. The fixed base has a circumferential blocking stop and a circumferential opening stop. The circumferential blocking stop locks the rotating base in the circumferential blocking position and the circumferential opening stop locks the rotating base in the circumferential opening position.

3. The cover device as claimed in claim 1 or 2, wherein, At least one of the first cover and the second cover is formed as a grid extending in the front-back direction and circumferentially along a circle centered on the axis.

4. The cover device as claimed in claim 1 or 2, wherein, The connecting part supports the first cover so that it can be unfolded upwards.

5. The cover device as claimed in claim 3, wherein, The connecting part supports the first cover so that it can be unfolded upwards.

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