JP6691049B2 - Cover device for tool holders - Google Patents

Description

  The present invention relates to a cover device for a tool holder.

  Machine tools such as automatic lathes are equipped with tools such as cutting tools for machining workpieces. The tool is attached to a tool holder, and the tool holder is attached to a tool rest of a machine tool. The tool holder is attachable to and detachable from the tool rest in order to replace the tool and adjust the position (Patent Document 1).

JP, 2004-142049, A

  Patent Document 1 discloses a tool holder provided with a handle, but the cutting edge of the tool fixed to the tool holder is exposed, and when the tool holder is attached to or detached from the tool rest, it is removed from the tool rest. Careful handling is required when handling a broken tool holder.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cover device for a tool holder that can facilitate handling when the tool holder is attached to or detached from a machine tool or when the tool holder is carried. And

  According to the present invention, a tool having a cutting edge is fixed to a tool holder that is fixed to a machine tool and is detachably attached to the tool holder, a cover portion that covers the cutting edge, and a gripping state when the tool is attached to the tool holder. It is a cover device for a tool holder provided with a handle part that can be.

  According to the cover device for a tool holder according to the present invention, it is possible to facilitate handling when the tool holder is attached to or detached from the machine tool or when the tool holder is carried.

It is a perspective view which shows the tool holder to which the bite was fixed. It is a figure showing the state where the tool holder is attached to the tool rest of the automatic lathe. It is a figure explaining the outer setup by an adjustment jig. It is a perspective view which shows the cover apparatus for tool holders. It is a principal part sectional view (the 1) which shows the operation which attaches the tool holder cover device to the tool holder attached to the tool rest or the external setup device. It is a principal part sectional view (the 2) which shows operation which attaches the tool holder cover device to the tool holder mounted in the tool rest or the external setup device.

  A cover device 100 for a tool holder, which is an embodiment of a cover device for a tool holder according to the present invention, will be described below with reference to the drawings.

<Tool holder>
FIG. 1 is a perspective view showing a tool holder 20 to which a bite 10 which is an example of a tool is fixed, and FIG. 2 shows a state where the tool holder 20 is attached to a tool rest 300 of an automatic lathe which is an example of a machine tool. FIG.
The tool holder 20 shown in FIG. 1 has five bites 10 (bits 11, 12, 13, 14, 15) fixed thereto. The number of cutting tools 10 fixed to the tool holder 20 is an example, and any number of cutting tools 10 may be fixed.
The cutting tool 10 is fixed with the cutting edge 10a protruding from the tool holder 20.

  The tool holder 20 includes a main body portion 21 and a tightening member 22 having a bolt 23 and a shim having a wedge-shaped cross section. When the bolts 23 are tightened to the main body 21, the shims are fitted between the main body 21 and the cutting tool 10, and each cutting tool 10 is fixed to the tool holder 20.

  As shown in FIG. 2, a positioning pin 21e is formed on the back surface 21a of the main body 21 so as to project therefrom. Although two positioning pins 21e are formed, only one positioning pin 21e is shown in FIG. The other one positioning pin 21e is formed on the back side of the paper surface of FIG. 2 at a position overlapping with the exposed positioning pin 21e.

<Automatic lathe>
Two positioning holes 310a are formed in the tool post 300 of the automatic lathe. In the tool holder 20, two positioning pins 21e are fitted in the respective positioning holes 310a to be positioned at a predetermined position of the tool rest 300, and the rear surface 21a is in close contact with the mounting surface 310 which is the front surface of the tool rest 300. Then, the tool holder 20 is tightened and attached to the tool rest 300 by a fixing bolt 24 (an example of a fixing member) passed from the tool holder 20 side.
When the bolt 24 is removed, the tool holder 20 is removed from the tool rest 300. Thus, the tool holder 20 is attachable to and detachable from the tool rest 300.
Although there are four fixing bolts 24, the two lower bolts 24 in FIG. 1 are hidden by the fastening member 22. The number of bolts 24 is not limited to four.

The setup such as replacement of the cutting tool 10 fixed to the tool holder 20 and adjustment of the amount of protrusion of the blade tip 10a with respect to the tool holder 20 is performed with the tool holder 20 removed from the tool rest 300.
The setup of the cutting tool 10 with the tool holder 20 removed from the tool rest 300 is called so-called outer setup, but the outer setup is more work than the setup performed with the tool holder 20 attached to the tool rest 300. Has the advantage that it becomes easier.

<Adjustment jig>
FIG. 3 is a diagram for explaining the external setup by the adjusting jig 200. In the external setup, for example, the adjustment jig 200 shown in FIG. 3 is used.
The adjustment jig 200 includes a base 210 on which the tool holder 20 is placed, a gauge 220, and a fixing screw 230.

The base 210 has an upper surface 211 with which the rear surface 21a (see FIG. 2) of the tool holder 20 is in close contact. On the upper surface 211, there are positioning holes (not shown) into which the positioning pins 21e are fitted, and female screws (not shown) that mesh with the fixing bolts 24 while the positioning pins 21e are fitted into the positioning holes, respectively. Has been formed.
The tool holder 20 is arranged on the base 210 so that the back surface 21a is in close contact with the upper surface 211, the positioning pin 21e is fitted in the positioning hole, and the fixing bolt 24 is tightened to the female screw, so that the tool holder 20 is fixed to the base 210. It is positioned and mounted at a predetermined position.

Two columnar pins 223 and 224 are fixed to the gauge 220, and the pins 223 and 224 are inserted into holes 212 and 213 formed in the upper surface 211, respectively.
The hole 212 into which the pin 223 is inserted has an inner diameter substantially the same as the outer diameter of the pin 223, and rotatably supports the pin 223. On the other hand, the hole 213 into which the pin 224 is inserted is formed to be larger than the outer diameter of the pin 224 by several mm. Therefore, the gauge 220 can move with respect to the base 210, with the hole 212 as the center of rotation, by the gap between the hole 213 and the pin 224, as indicated by the arrow.
The pins 223 and 224 can be pulled out from the holes 212 and 213, and the gauge 220 can be attached to and detached from the base 210.

  The fixing screw 230 is attached to the base 210 so as to penetrate from the side surface of the base 210 to the hole 213. When the fixing screw 230 is loosened, the pin 224 can move in the hole 213 and the gauge 220 can move in the arrow direction. On the other hand, when the fixing screw 230 is tightened, the fixing screw 230 comes into contact with the pin 224 and fixes the pin 224 in a state of being brought close to the end of the hole 213, and the gauge 220 is fixed to the base 210.

  Surfaces (hereinafter referred to as abutting surfaces) 221, 222 on which the cutting tools 10 are abutted are formed on the side surfaces of the gauge 220. The abutting surface 221 of the present embodiment is a surface for abutting the cutting edges 10a of the cutting tools 11, 12, 13, and 14 of the tool holder 20 mounted on the base 210. The abutting surface 222 is a surface for abutting the blade edge 10a of the cutting tool 15 of the tool holder 20 mounted on the base 210.

  When adjusting the amount of protrusion of the cutting edge 10a of the cutting tool 10, the bolts 23 of the tool holder 20 mounted on the base 210 are loosened, and the gauge 220 is mounted on the base 210. At this time, the fixing screw 230 is loosened, and the abutting surfaces 221 and 222 of the gauge 220 are kept away from the cutting edge 10a.

Next, the fixing screw 230 is tightened to fix the gauge 220 to the base 210, and the blade tip 10a of the cutting tool 10 is moved so as to abut against the abutting surfaces 221, 222. The length is adjusted according to the position of 222.
After adjusting the amount of protrusion of the cutting edge 10a, the bolt 23 is tightened to fix the cutting tool 10 to the tool holder 20.
Further, the fixing screw 230 is loosened and the gauge 220 is removed from the base 210.

  The abutting surfaces 221 and 222 are formed corresponding to the amount of protrusion of the cutting edge 10a. Therefore, if a plurality of gauges 220 having different abutting surfaces 221 and 222 are prepared, the gauge 220 can be replaced and used. By doing so, the amount of protrusion of the cutting edge 10a can be variously changed according to the positions of the abutting surfaces 221 and 222.

<Structure of cover device>
FIG. 4 is a perspective view showing the cover device 100 for the tool holder 20, and FIG. 5 is a cross-sectional view of essential parts showing an operation of attaching and detaching the cover device 100 to the tool holder 20 mounted on the tool rest 300 or the adjustment jig 200. (No. 1) and FIG. 6 are cross-sectional views (No. 2) of the main parts showing an operation of attaching and detaching the cover device 100 to and from the tool holder 20 attached to the tool rest 300 or the adjustment jig 200.

The cover device 100 is attached to the tool holder 20 when the tool holder 20 is attached to or detached from the tool rest 300 or when the tool holder 20 is carried.
As shown in FIG. 4, the cover device 100 includes a mounting screw 50 as an example of a mounting portion that is detachably mounted to the tool holder 20, a cover portion 60 that covers the cutting edge 10a (see FIG. 1), and the tool holder 20. Two grips 70 as an example of a handle portion that can be gripped in a state of being attached to the.

The cover portion 60 is made of metal or the like. The cover part 60 includes a lower cover part 61, a front cover part 62 (an example of a face cover part), an upper cover part 63, a back cover part 64, and a side plate part 65.
The lower cover portion 61 covers the blade tip 10a in a state of being attached to the tool holder 20. The front cover portion 62 covers most of the front surface 21b of the tool holder 20 (the surface opposite to the back surface 21a: see FIG. 2). The upper cover portion 63 covers the upper portion of the front surface 21b above the front cover portion 62 and is formed to have a short distance from the front surface 21b of the tool holder 20 due to a step. The back cover portion 64 is connected to the lower cover portion 61 and is formed to face the front cover.
The side plate portion 65 is formed by connecting the lower cover portion 61 to the front cover portion 62 and the rear cover portion 64 on both side surfaces of the cover portion 60.

  Further, the cover part 60 is provided in parallel with the side plate part 65, and includes two support plates 66 connected to the front cover part 62, the lower cover part 61, and the back cover part 64. The upper end surface 66 a of the support plate 66 and the support surface 68 formed on substantially the same surface as the upper end surface 66 a are support portions that support the lower end surface 21 c of the tool holder 20. On the upper end portion of the support plate 66 on the rear cover portion 64 side, a hooking portion 67 protruding upward from the upper end surface 66a is formed. The hook portion 67 is hooked on a corner portion 21d between the lower end surface 21c and the back surface 21a of the tool holder 20.

The two handles 70 are attached to the front cover portion 62. Each handle 70 is formed so as to extend in the vertical direction and can be gripped by both hands at the same time.
The mounting screw 50 has a male screw 51 that meshes with the female screw portion 25 provided on the tool holder 20. The mounting screw 50 is provided so as to penetrate the upper cover portion 63. The mounting screw 50 is designed so as not to come off from a hole penetrating the upper cover portion 63.

  The mounting screw 50 is arranged at a position corresponding to the female screw portion 25 provided on the tool holder 20, with the upper end surface 66 a of the support plate 66 supporting the lower end surface 21 c of the tool holder 20.

Further, each of the front cover portion 62 and the upper cover portion 63 has two access holes 69 (an example of an access portion). These access holes 69 are formed in the portions facing the four fixing bolts 24 in the state where the cover device 100 is attached to the tool holder 20.
These access holes 69 allow the bolts 23 to be accessed from the outside of the cover device 100 through a wrench 400 that tightens and loosens the bolts 24.

<Operation of cover device>
As shown in FIG. 5, the cover device 100 is held by holding one handle 70 with the left hand and holding the other handle 70 (not shown) with the right hand.
Then, the cover device 100 is brought closer to the tool holder 20 mounted on the tool rest 300 from the lower side. That is, first, the cutting edge 10a is housed in the space 60a surrounded by the back cover portion 64, the lower cover portion 61, and the front cover portion 62. At this time, if the upper portion of the cover device 100 is tilted toward you, the blade tip 10a can be easily housed in the space 60a.

  After the cutting edge 10a is housed in the space 60a, the hook portion 67 is hooked on the corner portion 21d, and the tilted cover device 100 is set up with the corner portion 21d as the center of rotation. As a result, as shown in FIG. 6, the abutting surface 60b on the back side of the cover device 100 abuts the front surface 21b of the tool holder 20.

Further, the upper end surface 66 a of the support plate 66 of the cover device 100 abuts the lower end surface 21 c of the tool holder 20.
In this state, one hand is released from the handle 70, and the mounting screw 50 is screwed into the female screw portion 25 with that hand. Thereby, the cover device 100 is attached to the tool holder 20.

  Next, while holding the cover device 100 by grasping one of the handles 70 by hand, the other hand is used to pass the wrench 400 through the access hole 69 from the outside of the cover device 100 to access the fixing bolt 24, and then the wrench 400. Loosen the bolt 24 with. When all the four bolts 24 are loosened, the tool holder 20 is disconnected from the tool rest 300.

At this time, the tool holder 20 has the lower end surface 21c supported by the upper end surface 66a of the support plate 66 and the support surface 68, and is fixed by the mounting screw 50.
When the handle 70 is grasped with both hands and pulled toward you, the tool holder 20 moves together with the cover device 100, and the tool holder 20 is removed from the tool rest 300.

  The tool holder 20 removed from the tool rest 300 is moved while holding the handle 70 by hand, and the cover device 100 is still attached to the tool holder 20 at a predetermined position on the upper surface 211 of the base 210 of the adjustment jig 200 ( The abutting surface 60b is placed in close contact with the position where the positioning pin 21e is fitted in the positioning hole). In this state, FIG. 6 is viewed horizontally. When the tool holder 20 is attached to or detached from the adjustment jig 200, the gauge 220 is removed from the base 210.

  Next, the wrench 400 is passed through the access hole 69 from the outside of the cover device 100 to access the fixing bolt 24, and the bolt 24 is screwed into the female screw of the base 210 by the wrench 400, and the tool holder 20 is attached to the adjustment jig 200. It Then, the cover screw 100 is removed from the tool holder 20 by loosening the mounting screw 50 and pulling it out from the female screw portion 25.

To remove the tool holder 20 from the adjustment jig 200, the above-described mounting operation may be performed in the reverse order.
The operation of attaching the cover device 100 to the tool holder 20 attached to the adjustment jig 200 is the same as the operation of attaching the cover device 100 to the tool holder 20 attached to the tool rest 300, and was viewed sideways in FIG. It becomes a state.

The tool holder 20 removed from the adjusting jig 200 is moved while holding the grip 70 with both hands, and with the cover device 100 still attached, a predetermined position of the tool rest 300 (positioning pin in the positioning hole 310a). 21e is installed).
While holding the handle 70 with one hand, the wrench 400 is passed through the access hole 69 from the outside of the cover device 100 with the other hand to access the fixing bolt 24, and the bolt 24 is tightened with the wrench 400. When all the four bolts 24 are tightened, the tool holder 20 is mounted on the tool rest 300.
Then, the cover screw 100 is removed from the tool holder 20 by loosening the mounting screw 50 and pulling it out from the female screw portion 25.

  As described above in detail, according to the cover device 100 for the tool holder 20 of the present embodiment, the blade tip 10a is covered when the tool holder 20 is attached to or detached from the tool rest 300 or when the tool holder 20 is carried. Therefore, the cutting edge 10a can be handled without paying special attention.

Further, according to the cover device 100, when the tool holder 20 is attached to or detached from the tool rest 300 or when the tool holder 20 is carried, the handle 70 of the cover device 100 can be grasped and handled by hand, and thus the weight is heavy. The tool holder 20 can be easily held, and handling can be facilitated.
Moreover, since the handle 70 constitutes a part of the cover device 100, the handle 70 may be an obstacle to use when the tool holder 20 is mounted on the tool rest 300 or the adjustment jig 200 for use. Absent.

  Since the handle 70 is provided on the front cover portion 62, the operation of holding the handle 70 by hand and pulling it toward the front side separates the tool holder 20 from the tool rest 300 and pushes the tool holder 20 forward (toward the back side). Can be brought into contact with the tool rest 300. This makes it easy to attach and detach the tool holder 20 to and from the tool rest 300.

  In the cover device 100 of the present embodiment, the handle 70 is applied as an example of the handle portion, but the handle portion is not limited to the handle 70, and may be gripped by the cover portion 60, for example. It is also possible to form a concave portion that can be used as a handle portion.

  Further, since the cover device 100 has the access hole 69 for accessing the bolt 24 for mounting the tool holder 20 on the tool rest 300 in the state where the cover device 100 is attached to the tool holder 20, the cover device 100 is attached to the tool holder 20. The tool holder 20 can be attached to and detached from the tool rest 300 while being attached.

  The cover device 100 functions as an attachment portion because the lower end surface 21c of the tool holder 20 is supported from below by the upper end surface 66a of the support plate 66 and the support surface 68. Therefore, the weight of the tool holder 20 can be dispersed and held, and the posture of the tool holder 20 can be stabilized, as compared with the case where the tool holder 20 is fixed only by the mounting screw 50.

Cross-reference of related applications

  This application claims priority based on Japanese Patent Application No. 2014-204643 filed with the Japan Patent Office on October 3, 2014, the entire disclosure of which is incorporated by reference herein in its entirety.

10 bytes (an example of tool)
10a Blade edge 20 Tool holder 50 Mounting screw (an example of mounting part)
60 cover part 60a space 69 access hole (an example of access part)
70 Handle (an example of handle)
100 Cover device 200 Adjustment jig 300 Turret 400 of automatic lathe (an example of machine tool) 400 Wrench

Claims (5)

Can be a tool having a cutting edge for gripping a mounting portion detachably mounted to the tool holder to be attached to the machine tool is fixed, and a cover portion covering the cutting edge, in a state of being attached to the front Symbol toolholder A cover device for a tool holder, comprising a handle part and an access part for accessing a fixing member for mounting the tool holder on the machine tool while being attached to the tool holder. Claims wherein Engineering tools Hol da is said by the fixing member, wherein the machine tool and the machine tool to adjust the position of the cutting edge is alternatively mounted to one of the provided separately from adjusting jig The cover device for the tool holder according to 1.   The surface cover part which covers at least one part of the surface on the opposite side to the surface mounted to the said machine tool of the said tool holder is provided, The said handle part is provided in the said surface cover part. The cover device for the tool holder according to item 2. 4. The mounting portion is provided on the cover portion, and has a male screw that meshes with a female screw formed on the tool holder and a retainer that prevents the male screw from coming off from a hole penetrating the cover portion. A cover device for a tool holder according to item.   The cover device for a tool holder according to claim 1, wherein the attachment portion supports the tool holder at two or more places.

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