JP3462396B2 - Work support device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting a workpiece to be machined. 2. Description of the Related Art Conventionally, as a supporting device for a workpiece to be machined, as disclosed in Japanese Patent Application Laid-Open No. 5-104312, a fluid supplied from an air tube inserted through a shaft of a spindle is known. Through a branch-shaped passage rotating together with the spindle, by switching and feeding the piston to the front side or the rear side of the hollow chamber in the base body to move the piston, and a plurality of pistons arranged in front of the diaphragm with the movement of the piston. The gripping claws are expanded or contracted. In addition, a coolant tube is built in the spindle of the spindle, and coolant liquid and air supplied from the coolant tube are supplied (as sprayed) to the work gripped by the gripping claws. It has become so. As shown in FIG. 5, a coolant tube 63 is connected to the tip of a tube shaft 62 which is incorporated in the shaft of a rotary joint 61 so as to freely rotate, as shown in FIG. , Pipe shaft 6
A cylindrical body 64 protruding from the end wall in the rotary joint 61 is fitted into the end of the tube 2 so as to allow rotation of the tube shaft 62. The tubular body 64 is connected to a coolant or air pressure feed pipe 65. According to the above configuration, since the pipe shaft 62 and the cylindrical body 64 are connected by a fitting method (to allow rotation at the fitting portion), the coolant liquid and air are sent under high pressure. then, the pipe 6 leaks to occur, the leaked coolant and air, which flows into the annular hollow space 66 which is provided in the stationary member 1 terminal, is connected to the hollow chamber 66
7 to be collected. Using such a coolant supply passage, a sensor for accurately seating the work to be gripped by the gripping claws of the air to be supplied to the coolant supply passage (the work is brought into close contact with the air injection hole to prevent the air from flowing out) In this case, air is leaked from the connection part of the above-mentioned fitting type, and the air pressure fluctuates. As a result, the sensor cannot function as a sensor. . [0008] Therefore, it is possible to eliminate by projecting the tube or tube axis at the rear of the rotary joint, the above-mentioned problems by the d APA Lee <br/> flop connected via a rotary joint at its protruding end. [0009] However , even if an attempt is made to jet a high-pressure coolant liquid in order to separate (fly) the cutting edge from the cutting edge at the time of cutting or the cutting edge accompanying the cutting, the purpose cannot be achieved due to leakage. [0010] Therefore, the present invention is to enable high pressure of the coolant fluid is supplied to the up edge injection or chips of withdrawal (skip) injection for. [0011] In order to solve the above-mentioned problems, the present invention comprises a piston built in a hollow chamber provided in a base body which rotates together with a spindle of a machine tool. Providing passages respectively communicating with the hollow chambers, inserting the respective leading ends of the fluid supply tubes into the respective passages through the shaft core of the spindle, fixing an outer peripheral edge to a front peripheral edge of the base, and A diaphragm for transmitting the movement of the piston through appropriate means is provided, a plurality of gripping claws are provided on the front surface of the diaphragm, provided at the end of the spindle, and a rotary joint is provided on a supply path of a fluid supplied from a pipe. A sensor nozzle for connecting the end of the fluid supply tube through the nozzle and closing the injection port by seating the workpiece on the base body is provided. In addition, a tip of the sensor nozzle is connected to supply fluid to the sensor nozzle, and a terminal of a sensor fluid tube inserted into the axis of the spindle and the rotary joint are incorporated into the rotary joint so as to rotate together with the spindle. connecting the tip of the tube axis of the free rotation, together with the supplied fluid sensors from outside in the upper Symbol rotary joint terminal, provided an inlet tube which is connected via a mechanical seal at the end of the pipe shaft the word over click support device
A coolant nozzle is provided on the base, connected to an inflow end of the coolant nozzle so as to receive a fluid supply from a sensor fluid tube, and opened in the middle of the coolant nozzle at a pressure higher than the sensor fluid pressure. A configuration in which a check valve is provided is adopted. Embodiments of the present invention will be described with reference to the accompanying drawings. [0013] In the implementation form of the invention, as shown in FIGS. 1 to 3, the hollow chamber 3 is provided on the base body 2 which rotates together with the spindle 1 of a machine tool, this hollow space 3, the piston 4 Is incorporated. The base 2 is provided with a first passage 5 communicating with the front hollow chamber 3 of the piston 4 and a second passage 6 communicating with the rear hollow chamber 3 of the piston 4. When the fluid (air) is pumped from the second passage 6, the piston 4 moves forward, and when the fluid (air) is pumped from the first passage 5, the piston 4 moves backward. Further, a front surface of the base 2 is opposed to the front surface at a predetermined interval, and an outer periphery is fixed to a peripheral portion of the base 2 via a fixing tool (not shown) such as a bolt. The center part is pushed out by the advance and retreat of the piston 4,
A retractable diaphragm 7 is provided. As the interlocking means for pushing out and pulling back the center of the diaphragm 7 as the piston 4 advances and retracts, a screw cylinder 8 projecting from the front center of the piston 4 and a screw hole 9 at the center of the diaphragm 7 as shown in FIG. Are connected by screwing, and the slide of the piston 4 is directly transmitted to the diaphragm 7.
The system in which the reciprocating motion of the piston is applied via a slider that slides via a ball may be adopted. Further, on the front surface of the diaphragm 7, there are provided gripping claws 10 of the work A arranged appropriately. The gripping claws 10 are radial (not shown).
The bolts 12 are screwed into screw holes 11 of the diaphragm 7 and attached. The diaphragm 7 is made of, for example, a precipitation hardened alloy material, is machined in a solution treatment state, is heat-aged and hardened by age, and has an appropriate hardness and a large notch tensile strength. Further, a rotary joint 15 having a first fluid supply path 13 and a second fluid supply path 14 is connected to the end of the spindle 1.
A fluid supply pipe 16 is connected to the supply path 14. The outlet of the first supply passage 13 and the first passage 5
The two ends of a tube 18 inserted into a through hole 17 in the axis of the spindle 1 are connected to an inlet of the second supply passage 14 and an inlet of the second passage 6. The tube 18 is made of, for example, nylon or other soft and light material.
Any material that can be easily cut or bent may be used. As the connecting means, for example, as shown in the figure, the fitting means is fitted in the hole 19 or the cylindrical part on the other side, and is attached in an airtight manner with an application adhesive, or by using a cylindrical screw-in type fastener 20. Do. Further, a plurality of sensor nozzles 21 are provided on the front surface of the base member, and when the work A is accurately grasped and seated by the grasping claws 10, the injection port is closed by the work A. A sensor fluid tube 23 inserted through the shaft of the spindle 1 is connected between the tip of the tube shaft 22 that rotates together with the spindle 1 incorporated in the shaft of the rotary joint 15 and the end of the sensor nozzle 21. Connected. The connection of the above-mentioned sensor fluid tube 23 is performed by a fitting method with the opposite end. Further , the supply of the sensor fluid to the tube shaft 22 is supplied from a pipe 25 to an inlet tube 24 provided in the end of the rotary joint 15, and the end of the tube shaft 22 and the tip of the inlet tube 24 are supplied. Are connected via a mechanical seal 26 to supply a fluid (air) and coolant air to the sensor nozzle 21 from the inlet tube 24 to the tube shaft 22 and the tube 23, and a coolant liquid by switching as necessary. The reason is that high-pressure air for the purpose of blowing off cutting chips and high-pressure coolant for extending the cutting conditions and the life of the blade can be switched as required. As described above, the mechanical seal 26 is provided with the rotary joint 15 (shown in FIGS. 1 and 3).
Of the hollow chamber 27, a passage 28 provided so as to communicate from the rear end wall of the hollow chamber 27 toward the rear with the pipe 25, and an inflow tube 24 fitted into the outlet side of the passage 28. A leakage preventing O-ring 30 interposed between the end of the cylinder and the collar 29, and an engaging means 31 (in the illustrated case, the flow restricting member is configured to stop the rotation of the inlet tube 24 and allow the inlet tube 24 to slide). Notch 33 provided in flange 32 of inlet tube 24
And a screw 34 screwed into the rear wall of the hollow chamber 27 and fitted into the notch 33).
A spring 35 for applying a protruding pressing force to the inlet tube 24 so as to press (press) the distal end surface of the tube 4 against the distal end surface of the tube shaft 22.
It is composed of [0029] Once you that causes closed condensation of the gripping claws 10 while backward the piston 4 from the first passage 5 from the pipe 16 f of the tube 18 to supply fluid to the piston 4 the front side of the hollow chamber 3, Chijimi閉Work A (shown in FIG. 4) on the outside of the gripping claws 10
And presses the piston 4 to release the backward fluid, and supplies the fluid from the second passage 6 to the rear of the piston 4 of the hollow chamber 3 from the second passage 6 via the pipe 16 to the tube 18. The workpiece A is gripped by expanding the gripping claws 10 while moving forward. While maintaining this gripping state, the pipe 25
When the sensor fluid is pressure-fed, the fluid is directed from the passage 28 to the sensor nozzle 21 through the inflow tube 24, the pipe shaft 22, and the tube 23. When closed, there is no outflow of fluid, and when the seating of the work A is not accurate, the fluid flows out from the ejection port of the sensor nozzle 21. Then, whether there is leakage of the sensor fluid,
Whether the work A is accurately seated or uncertain seating can be detected depending on whether or not the work A is seated. Of course, a stable and constant flow pressure is directed from the inlet tube 24 to the pipe shaft 22 by the mechanical seal 26. Therefore, malfunction as a sensor due to fluid leakage is eliminated. A coolant nozzle 41 is provided on the front surface of the substrate 2 of the work supporting apparatus as described above, and the coolant nozzle 41 communicates with the coolant nozzle 41 from the tube 23 through the passage 43 so as to receive the supply of the sensor fluid. The coolant nozzle 41 is provided with a check valve 42 that opens at a pressure higher than the sensor fluid pressure. With the above configuration, when processing the work A, the fluid is fed to the tube 23 at a pressure higher than the sensor fluid pressure. Then, the check valve 42 is opened, and the fluid is sprayed from the coolant nozzle 41. The above-mentioned coolant fluid supplies a coolant liquid other than air. The work supporting apparatus according to the present invention has a base
The coolant nozzle is provided on the front of the sensor, and the coolant nozzle is provided with a check valve that opens at a pressure higher than the fluid pressure for the sensor. Coolant supply becomes possible. Therefore, in addition to spraying the coolant to the cutting edge, chips can be blown off, and high-speed rotation can be performed, so that the accuracy is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal side view a front view of FIG. 2 Id. Figure 3 is a longitudinal enlarged side view of the mechanical seal 4 shows the coolant nozzle portion of this inventions embodiments Enlarged vertical cross-sectional view [FIG. 5] Longitudinal cross-sectional view of conventional example [Description of symbols] 1 Spindle 2 Base 3 Hollow chamber 4 Piston 5 First passage 6 Second passage 7 Diaphragm 8 Screw cylinder 9 Screw hole 10 Gripping claw 13 First Supply path 14 Second supply path 15 Rotary joint 16 Pipe 17 Through hole 18 Tube 21 Sensor nozzle 23 Sensor fluid tube 24 Inlet tube 25 Pipe 26 Mechanical seal 27 Hollow chamber 28 Passage 29 Collar 30 O-ring 31 Engaging means 32 Flange 33 Notch 34 Screw 35 Spring 41 Coolant nozzle 42 Check valve

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23B 31/32 B23B 31/30 B23B 31/02 B23Q 11/10 B23Q 17/00

Claims (1)

(57) [Claim 1] A piston is built in a hollow chamber provided in a base that rotates together with a spindle of a machine tool, and passages respectively communicating with the hollow chamber before and after the piston are provided.
The respective ends of the fluid supply tubes are connected to the respective passages by being inserted into the axis of the spindle, the outer peripheral edge is fixed to the peripheral edge of the front surface of the base, and the movement of the piston at the center through appropriate means. Providing a diaphragm for transmission, providing a plurality of gripping claws on the front surface of the diaphragm, providing at the end of the spindle, connecting the end of the fluid supply tube to the supply path of the fluid supplied from the pipe via a rotary joint, A sensor nozzle for closing the injection port by seating the work on the base body, and a tip of a sensor fluid tube inserted into the axis of the spindle by connecting a tip so as to supply a fluid to the sensor nozzle and A free-running rotary assembly incorporated into the rotary joint to rotate with the spindle Connecting the distal end of the shaft, the upper Symbol with receiving a supply of fluid sensors from the outside into the rotary joint terminal, word over click support provided with the inlet tube which is connected via a mechanical seal at the end of the pipe shaft Equipment smell
A coolant nozzle is provided on the base, and connected to an inflow end of the coolant nozzle so as to receive a fluid supply from a sensor fluid tube; and a valve is opened in the middle of the coolant nozzle at a pressure higher than the sensor fluid pressure. A work supporting device, characterized in that a check valve is provided.