JPH0727738U - Follow-up coolant nozzle device - Google Patents

Abstract

(57) [Abstract] [Purpose] Without increasing the size of the spindle head and machining tool, it monitors the machining condition of the machining part of the workpiece and does not cause interference with other tools in the tool storage magazine. A fixing member 2a is fitted over the spindle head 1, a front cover 2b at the tip of the spindle head is attached, and a rotatable body 3 is fitted on the spindle head between the fixing member and the front cover 2b. From the fixing member 2a to the rotating body 3
The coolant passages 4, 5a, 5b, 6, 11a communicating with the coolant nozzle 13 via the above are provided, and the coolant connection port 19 is provided at the end. The coolant nozzle 13 is rotatably provided on the tool body 14, and the rear end portion of the coolant nozzle 13 is formed as an engaging portion 13a that engages and disengages with the coolant connection port 19 when the tool body 14 is attached to and detached from the spindle S. A coolant injection port 13b was provided at the tip.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention controls the injection direction of a coolant nozzle that injects a coolant (cutting fluid) following the movement of the machining area where the workpiece (workpiece) and machining tool come into contact, and the machining position is always adjusted from the optimum position. The present invention relates to a follow-up type coolant nozzle device capable of injecting coolant to a part.

[0002]

[Prior art]

 In cutting or grinding in machine tools, the injection port of the coolant nozzle that ejects coolant is moved to follow the movement of the machining area between the machining tool and the workpiece, and the coolant is always directed to the machining area from the direction suitable for machining. The cutting water supply device disclosed in Japanese Utility Model Laid-Open No. 62-134642 and Japanese Patent Laid-Open No. Sho 64-134642 are designed to prevent curling of the machined surface, clogging of the grindstone, and seizure by making it possible to jet. A water injection device for a machining center and a machining center disclosed in Japanese Patent Publication No. 34637/1992 are known.

[0003]

[Problems to be solved by the device]

 However, in the cutting water supply device of Japanese Utility Model Laid-Open No. 62-134642, since the follow-up mechanism is integrally provided on the spindle head, the spindle head becomes large, and it interferes with other machine components, mounting jigs, etc. There was a possibility of causing it. Further, since the tip of the nozzle is also provided on the spindle head side rotating ring, there is a problem in that it is not possible to establish an appropriate positional relationship depending on the tool diameter (grinding stone diameter). Also, since the rotating ring and control motor are located at the front end of the spindle, they are easily affected by cutting water, etc., causing a problem in the reliability of the equipment. Further, in the water injection device for a machining center disclosed in JP-A-64-34637, an air injection pipe, a coolant injection pipe, etc. are arranged around the tool body, and the structure of the connecting portion such as a connecting block becomes complicated, so that the machining tool side is There is a problem that the size is increased, it is not possible to easily monitor the state of the machining site, and interference with other machining tools occurs in the tool storage magazine.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to easily monitor the processing state of the processing portion of the work without increasing the size of the spindle head and the processing tool. (EN) Provided is a follow-up type coolant nozzle device in which there is no risk of interference with other processing tools in a tool storage magazine.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the follow-up type coolant nozzle device of the present invention is detachably mounted on a spindle head part and another part detachably mounted on a spindle, and straddles a machining tool for machining a workpiece. In the follow-up type coolant nozzle device provided as above, a fixing member fixed to the outer periphery of the spindle head at a position separated from the front portion of the spindle head by a predetermined amount and having a coolant passage formed therein, The rotary head is rotatably provided on the main spindle head between the fixed member and the front portion of the main spindle head, and is provided along a boundary between the fixed member and the rotary body, and a rotary body in which a coolant passage is formed. An annular groove that keeps the coolant passage of the fixed member and the coolant passage of the rotating body in communication at all times, and a coolant that is attached to the end of the rotating body and communicates with the coolant passage of the rotating body. A coupling member having a coolant connection port formed in the vicinity of the tip of the spindle head of the passage and an engaging portion that detachably engages with the coolant connection port of the coupling member are on one end side, and the coolant is directed toward the machining tool. Has a jetting port on the other end side for ejecting as a coolant, and a coolant passage is formed between the engaging portion and the jetting port, and the jetting direction of the coolant jetted from the jetting port is set between the machining tool and the workpiece. A coolant nozzle that is rotatably held by the tool body so as to be directed to a machining portion, a drive body that is provided in the vicinity of the fixed member of the spindle head and that rotates the rotary body, and a drive body that drives the drive body. It consists of a rotation transmission mechanism that transmits the rotation to a rotating body and rotates it, and a control device that controls the drive of the driving body, and follows the movement of the machining site due to the relative movement of the machining tool and the workpiece. Wherein the distal end of the coolant nozzle is to be moved around the working tool.

[0006]

[Action]

 Since the present invention is configured as described above, it operates as follows. The coolant nozzle is attached to the main shaft by an automatic tool changer (ATC) or the like together with a tool body that holds a processing tool such as a grindstone. At this time, the engaging part of the coolant nozzle engages with the coolant connection port of the connecting member to establish communication with the coolant passage of the connecting member, and the engaging part on the tool body side and the positioning member of the coolant nozzle disengage. As a result, the coolant nozzle can move around the machining tool. When a drive unit provided on the spindle head side is driven by a command from a control device such as an NC unit, the rotary unit rotates through the rotation transmission mechanism and the coolant nozzle moves around the machining tool, It is controlled to the most suitable position for injecting the coolant to the machining area between the workpiece and the workpiece. Coolant supplied from an external coolant supply device, etc. flows through the coolant passages formed in each of the fixed member, rotating body, connecting member, and coolant nozzle, and from the injection port of the coolant nozzle to process the processing tool and workpiece. It is jetted to the part.

[0007]

【Example】

 FIG. 1 is a sectional side view of an embodiment of a follow-up type coolant nozzle device according to the present invention. A fixing member 2a is fitted around the outer periphery of the spindle head 1 that rotatably supports the spindle S, is positioned in the rotational direction by a positioning pin 23, and is fixed by a not shown screw or the like. A front cover 2b is fixed to the tip end of the spindle head 1 with bolts. A first rotating member 3a and a second rotating member 3b are fitted to the outer periphery of the spindle head 1 between the fixed member 2a and the front cover 2b. The first and second rotating members 3a and 3b are rotatably supported by bearings 7a and 7b provided between the fixed member 2a and the front cover 2b, and at the same time, are attached to the spindle head 1. They are connected by a connecting member 21 with a tubular intermediate member 22 fitted over them interposed therebetween. The coolant passage 5a formed inside the first rotating member 3a and the coolant passage 5b formed inside the second rotating member 3b communicate with each other via the coolant passage 4a inside the coolant flow pipe 4. is doing. The first and second rotating members 3a and 3b, the intermediate member 22, the coolant flow pipe 4 and the like constitute the rotating body 3.

A coolant supply pipe 18 which is connected to a coolant supply device (not shown) provided outside and supplies the coolant from the coolant supply device to the follow-up type coolant nozzle device is a coolant passage formed in the fixing member 2 a. 6 is connected to the connection port 6a. An annular groove 5 is formed at the boundary between the fixed member 2a and the first rotating member 3a, and the coolant passages 5a and 6 of the fixed member 2a and the first rotating member 3a are always in communication with each other. A seal member such as an O-ring is fitted on both sides of the annular groove 5 of the first rotating member 3a so that the coolant does not leak from the boundary between the fixed member 2a and the first rotating member 3a. Has become. Reference numeral 17 is a plug.

A driving body 10 such as a servomotor and a reduction gear 10 a are fixedly mounted on a fixed portion near the spindle head 1. A gear 8 that meshes with a toothed gear 9 attached to the output shaft of the speed reducer 10a is attached to the first rotating member 3a by a bolt. The rotation transmission mechanism in this embodiment includes a gear 8 and a gear 9. Reference numeral 28 denotes a cover, which protects the driving body 10 and the rotation transmission mechanism from the scattered objects such as coolant and cutting chips.

A block body 11 as a connecting member is attached to the second rotating member 3b, and a coolant passage 11a communicating with the coolant passage 5b of the second rotating member 3b is formed inside the block body 11. Has been done. The other end of the coolant passage 11a is formed as a coolant connection port 19 having an opening in a plane orthogonal to the axis of the main shaft S. Reference numeral 16 is a plug. On the other hand, the coolant nozzle 13 is parallel to the axis of the main shaft S at the protruding portion 12a of the holding member 12 that is rotatably loosely fitted around the tool body 14 to which the processing tool 15 such as a grindstone is detachably attached. It is attached to the front end of the nozzle body 27 which is fixed as described above. The rear end of the nozzle body 27 is formed as an engaging portion 13a which can be engaged with and disengaged from the coolant connection port 19 as the tool body 14 moves along the axis of the main shaft S. Further, the tip of the coolant nozzle 13 is bent in an L shape toward the machining tool 15, and a coolant injection port 13b for ejecting the coolant to the machining tool and the work is provided at the tip thereof.

The coolant passage 13c formed inside the nozzle body 27 communicates with the coolant passage 11a of the block body 11 when the engagement portion 13a and the coolant connection port 19 are engaged with each other. There is. A seal member 19a is fixed to the inner peripheral surface of the coolant connection port 19 so that the coolant does not leak out. Further, the coolant passage 13c is formed so as to penetrate through the coolant passage 11a so that the pressure receiving areas of the coolant passage 13c are the same, and the pressure is balanced even when a high pressure coolant is used. That is, in the state where the engaging portion 13a is inserted into the coolant connection port 19, even if the high pressure coolant is supplied, an unnecessary load is not applied to the holding member 12, the processing tool 15 and the like.

An advancing / retreating member 26 is provided on the nozzle body 27 so as to be capable of advancing / retreating in the axial direction. A spring 25 is provided between the nozzle body 27 and the advancing / retreating member 26, and always biases the advancing / retreating member 26 toward the engaging portion 13a. A positioning member 20a is projectingly provided on the side of the advancing / retreating member 26, and an engaging member 20b engaging with and disengaging from the positioning member 20a is projectingly provided on the side of the tool body 14. That is, when the engagement portion 13a is inserted into the coolant connection port 19, the positioning member 20a and the engagement member 20 are disengaged, and when the engagement portion 13a is disengaged from the coolant connection port 19, the positioning member 20a and the engagement member 20 are disengaged. 20 and 20 are engaged. When the tool body 14 is stored in a tool storage magazine (not shown), the positioning member 20a and the engaging member 20b are engaged with each other, and the nozzle body 27 and the coolant nozzle 13 are positioned at a predetermined angular position. Positioned and held.

In the follow-up type coolant nozzle device of the present invention configured as described above, the drive body 10 and the fixing member 2a are attached and fixed to the fixed portion of the spindle head 1, and the spindle head 1 is rotated from the tip side. After the body 3 is fitted, the front cover 2b can be attached to the tip of the spindle head 1 with bolts, so that it can be easily retrofitted. Next, the follow-up type coolant nozzle device of the present invention configured as described above will be described. An automatic tool changer (not shown) is used to insert the tool body 14 into the tip of the spindle S that is oriented in the spindle direction for positioning in the rotational direction for tool exchange. Clamp with. At this time, the engaging portion 13a of the coolant nozzle 13 is inserted into and engaged with the coolant connection port 19 of the block body 11. Further, the engagement between the engaging member 20b of the tool body 14 and the positioning member 20a of the coolant nozzle 13 is released, and the coolant nozzle 13 can move around the machining tool 15 together with the holding member 12.

Since the coolant supply pipe 18 is connected to the coolant passage 6 provided in the fixed member 2a, the coolant supplied with a predetermined pressure from the coolant supply device (not shown) provided outside is not supplied. , And is supplied to the follow-up type coolant nozzle device through the coolant pipe 18. The coolant flows to the coolant nozzle 13 through the coolant passage 6 of the fixed member 2a, the annular groove 5, the coolant passage 5a of the rotating body 3, the coolant distribution pipe 4, the coolant passage 5b and the coolant passage 11a of the block body 11, and the coolant. The nozzle 13 is jetted toward the machining tool 15 and the workpiece from the jet port 13b provided at the tip of the nozzle 13.

When the driving body 10 is driven, the gear 8 that meshes with the gear 9 rotates via the reduction gear device 10 a, so that the rotating body 3, the block body 11, the nozzle body 27, and the coolant nozzle 13 that fix the gear 8 rotate. To do. Therefore, when the tool body 14 is inserted into the spindle S and the work tool 15 mounted on the tool body 14 is used for cutting or grinding the workpiece, this machining site moves, and the coolant nozzle 13 The position of can be changed, and the coolant can be always sprayed from an appropriate position toward the machining site of the workpiece and the machining tool 15. The control of the movement of the coolant nozzle 13 by the driving of the driving body 10 is controlled by a control device such as an NC device (not shown). In such a follow-up type coolant nozzle device, the nozzle body 27 and the coolant passage of the block body 11 can be reliably connected only by inserting the tool main body 14 into the main shaft S. When the workpiece is machined by the machining tool 15 such as a cutting tool or a grinding tool, the coolant can be sprayed to the machined portion from an appropriate direction.

Although a preferred embodiment of the follow-up type coolant nozzle device of the present invention has been described, the present invention is not limited to the above embodiment. For example, although the rotation transmission mechanism has been described as consisting of the gear 8 and the gear 9, it may be constituted by a sprocket and a chain, or a toothed belt and a toothed pulley. In addition, since the driving body and the like are located away from the processed portion, the cover 28 and the like can surely prevent scattering of scattered materials such as coolant and cutting chips, thereby improving the reliability of the device. To be

[0017]

[Effect of device]

 In the follow-up type coolant nozzle device of the present invention, since the rotating body and the rotation transmission mechanism are arranged on the spindle head side, only the movable coolant nozzle is arranged around the machining portion, and the coolant of the nozzle body is also arranged. Since the passage is shaped in consideration of the pressure balance, the structure of the connection part of the coolant passage can be simply formed despite supplying high-pressure coolant, and the machining tool equipped with the coolant nozzle can be made compact. Can be changed to Therefore, it becomes easy to monitor the processing site when processing the workpiece. Even if the coolant nozzle and the machining tool are integrated, the machining tool side can be downsized, and when storing in a tool storage magazine, etc., the machining tool having the coolant nozzle and other machining tools This makes it easy to create programs without interfering with and. In addition, retrofitting can be easily performed, and the vicinity of the front end of the spindle head does not become large.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of an embodiment of a follow-up type coolant nozzle device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Spindle head 2a ... Fixed member 2b ... Front cover 3 ... Rotating body 3a, 3b ... Rotating member 4 ... Coolant distribution pipe 5 ... Annular groove 5a, 5b, 6, 11a ... Coolant passage 8 ... Gear (rotation transmission mechanism) 9 ... Gear (rotation transmission mechanism) 10 ... Driving body 11 ... Block body (connecting member) 12 ... Holding member 13 ... Coolant nozzle 15 ... Machining tool 19 ... Coolant connection port 20a ... Engaging member 20b ... Positioning member

Claims (1)

[Scope of utility model registration request] 1. A follow-up type coolant nozzle device in which a part is detachably mounted on a spindle head and another part is detachably mounted on a spindle, and which is provided across a machining tool for machining a workpiece. A fixing member that is fixedly provided on the outer periphery of the head at a position spaced apart from the spindle head front portion of the spindle head by a predetermined amount, and has a coolant passage formed therein, and the spindle head between the fixing member and the spindle head front portion. A rotary body rotatably provided with a coolant passage formed therein, and a coolant passage of the fixed member and a coolant passage of the rotary body provided along the boundary between the fixed member and the rotary body. An annular groove that is in a continuous communication state, and a coolant connection port formed near the tip of the spindle head of the coolant passage that is attached to the end portion of the rotor and that communicates with the coolant passage of the rotor. A coupling member and an engaging portion that removably engages with the coolant connection port of the coupling member are provided on one end side, and an injection port that ejects coolant toward the processing tool is provided on the other end side, and the engagement portion is provided. Coolant that is rotatably held by the tool body so that a coolant passage is formed between the tool body and the injection port, and the injection direction of the coolant that is injected from the injection port is directed to the machining site of the machining tool and the workpiece. A nozzle; a drive member that is provided near the fixed member of the spindle head to rotate the rotating body; a rotation transmission mechanism that transmits the drive of the drive body to the rotating body to rotate the rotation body; And a control device for controlling the drive, so that the tip of the coolant nozzle can move around the machining tool by following the movement of the machining site due to the relative movement of the machining tool and the workpiece. Tracking type coolant nozzle device, characterized in that the.