TW526112B - Clamping device for rotary table - Google Patents

Abstract

The object of the invention is to provide a clamping device capable of providing a sufficient clamping force even in a small rotary table. The solution of the subject invention involves a rotary table that comprises a spindle rotatably supported on a frame body, a work table fixed to an end part of the spindle, and a driving device for rotatably driving the spindle. This clamping device for such a rotary table comprises a plurality of clamping discs rotated integrally with the spindle and arranged with a specified space in the axial direction of the spindle, a plurality of clamping faces formed at the frame body opposedly to the side faces of the respective clamping discs, and a braking means for pressing each clamping disc to the corresponding clamping face.

Description

^ 6112 V. Description of the invention ⑴ Indicate the technical field to which it belongs] From the screwdriver that performs & degree to the workpiece :: It is about the clamping device used in the machine tool. Known technology] Characteristic: The center of the rotary table In the tightening device, however, the wheel and the structure are used as the rotating table; 2 the problem with non-reversible rotation is used: In the case of the structure, the following question still exists, ^, > Worms and worm wheels are A kind of biting place will still exist, so the backlash between the two rotating tables 5J and 2 will have gaps in the amount of backlash, and the stop state will also cause errors depending on the angle, which will affect the score. Problems such as processing accuracy on the rotary table that have been passed. "In order to solve the above problems, the workpieces held on the rotary table have been registered in Roshi ~ 〇S7〇fiRc ... The previous technology uncovered in 25 70 6 65 is: a chuck is provided, the first is used to convey the rotation motion of the * spinning drive device to the heart of the turntable ', the shaft'-body rotation? '· Clamping Piston, which is set up to work the chuck between: the housing. This makes it possible to apply air pressure to the clamping piston and clamp the disc between the clamping piston and the housing, and use the frictional force generated between the chuck and the housing to restrict the connection to the chuck. Movement of the mandrel to ensure the stationary state of the rotary table connected to the mandrel. [Problems to be Solved by the Invention] However, in the above-mentioned conventional technique, in order to obtain a large clamping force, it is necessary to increase the clamping force. The outer diameter of the disc and the clamping piston is used to increase the frictional torque generated between the chuck and the housing 89117543.ptd Page 4 526112 V. Description of the invention (2), so it is used on a small rotary table. Therefore, the purpose of the present invention is to provide a clamping mechanism that can be clamped on a small rotary table to obtain a sufficient tightening force ^, even if [the means to solve the problem, function] "° In order to achieve the above Purpose, the scope of patent application: Shuang = centering is for a type of drive device that is rotatably supported by two shafts, a table fixed on the end of the mandrel, the core of the main body of the water, and driven by rotation. 'Turn = and = ^, I have: Most of the film chucks are left in the direction of the axis of the mandrel and are contained in the temple, and can be rotated integrally with the mandrel. The chucks are formed on the frame body with a plurality of ^ intervals and the sides of the chucks facing each other · = Surface, separate and set, push each of the above chucks to the corresponding chuck surface, and install the two brakes. The rotation a '3 of the patent application scope item 2 can be used as the patent application scope item The brake device; and complex =, there is a ring-shaped fluid pressure formed around the mandrel / supplied to the fluid supply unit in the fluid pressure chamber; method two = the fluid pressure in the fluid pressure chamber is increased and pushed To the chuck. ', Ling body ^ Moreover, the clamping of the rotary table described in the scope of the patent application No. 3: can be used as the brake split in the scope of the special brake application No. 2, and the second, clamping piston' The adjacent chucks are centered into the above-mentioned mandrel, and extend from the direction of the axis of the above-mentioned mandrel ^ and extend from the -end of the through part toward the direction of the above-mentioned mandrel.

\\ 312 \ 2D-CODE \ 89-ll \ 89H7543.ptd Page 5 526112 V. Description of the invention (3): Consisting of moving parts; the second loss-of-tension piston, which extends by & : The above-mentioned through-portion and the chamber 'are formed in contact with the above respectively; the fluid pressure main body, and the i-th and the second loss 2 = the pivot of the outer peripheral surface of the braking section: the section' supplies pressure fluid to the fluid; the chamber; = And the above-mentioned clamping surface is formed on the frame body in a manner that the supply portion of the brake mechanism is provided. The structure according to the present invention, which is inclined to the chuck on the opposite side, is provided by facing each other ... and using the respective chucks to push to the eighth force, so the braking effect can be increased. fine. Afterwards, it can be mounted on a small rotary table with ^ I7 enabler. Clamping with Negative Charge Clamping Force [Embodiment of Invention] Hereinafter, the embodiment of the invention will be described based on the embodiment 'and referring to the drawings. First, referring to Fig. 1, the structure of the rotary table 60 will be described. Inside the frame body 1, a mandrel 2 is rotatably supported by a bearing 20 ', and at the -end of the mandrel 2, a plurality of bolts 31 attached to the circumference at a uniform pitch are provided with a table 3. The pinion wheel 22 is embedded in the central part of the mandrel 2 in a concentric shape, and is fixed by a suitable device (not shown). In addition, the worm 23 is disposed on the rotating shaft, that is, it is disposed on an axis that is at right angles to the axis of the mandrel 2 and is rotatably supported on the frame body 丨 by engaging with the worm wheel 22. In the frame body 1, on the other side of the table,

526112 V. Description of the invention (4) ------ The screw pickup 32 is provided with a casing 24. An oil seal 25 is embedded in the inner peripheral surface of the housing 24, and the oil seal 25 is in contact with the outer periphery of the shaft end of the mandrel 2 to prevent a reduction in friction caused by cutting oil entering the clamping device, etc. phenomenon. In addition, the shaft end portion on the mounting side of the table 3 on the mandrel 2 is also the same as above. The oil seal 26 is embedded in the frame body 1 and contacts the outer periphery of the shaft end portion of the mandrel 2. FIG. 1 is the first The structure of the clamping device 70 is implemented. On the stepped surface 41 of the mandrel 2, the y pin 33 is provided with a first chuck 4, and the first clamping surface 6 is arranged with a small gap and is arranged on the second chuck on an evenly spaced circle. 5 is for the corresponding set. In addition, each of the sandwich surfaces 6, 7 is an intermittent surface. The clamping piston 9 is inserted between the first chuck 4 and the second chuck 5 into the mandrel 2 and is provided. The first clamping piston 8 is composed of a circular braking portion 44 extending toward the through portion 43 and a penetrating portion 43. A ring 46 is fitted in the braking portions 4 4, 4 of the first clamping piston 8. The outer peripheral surface of 5 is the inner peripheral surface of the tether body 1. In addition: The contact surfaces of the disks 4 and 5 are examples, and referring to it, the dagger 1 of the present invention is described at a plurality of positions on the circumference at equal intervals. In addition, a second chuck 5 is mounted on the end face of the hub portion of the wheel 22 with bolts 34. The ring-shaped second pinch surface 7 has a small gap and the system is not limited to a ring-shaped continuation surface. Clamping the piston 8 and the second, and movably aligned with the axial direction of the mandrel 2 in the axial direction, the penetrating end extending in the axial direction of the mandrel 2 is extended toward the radial direction of the mandrel 2 and the circular braking portion 45 is sandwiched by an O-shape. Inside the through portion 43. In addition, each of the circular clamps 0-rings 4 7 and 4 8 and contacting the frame ′ and the clamps on each of the clamping pistons 8 and 9 is not limited to a ring-shaped continuous surface, but may

526112 V. Description of the invention (5) Resting surface. Each of the clamping pistons 8, 9 and the frame body i 0, 48, 49 maintains airtightness and forms a ^ face ^ interval 'with a 0-shaped ring as follows: so that the air is recognized by the frame 1 and the soil to 1 u . With this, the composition is up to it. The present invention is not limited to the inflow pressure of the through-hole 49. Oil can also be used for working milk. Next, the operation of the clamping device will be described. When a driving motor (not shown) is used and the worm 23 is rotated to engage with the worm wheel 22 engaged by the worm 23, as i and so on, it rotates 2, the table 3, the first chuck 4 and the second chuck 5 and so on. Also rotate ^ operation = when the axis has reached a predetermined angle, even if it is stopped, so that *, two * its rotation flows into the air pressure chamber! Within 0. At this point, the air pressure chamber 10 is within;; = 气 =, press each of the tightening pistons 8 and 9 and press: to the corresponding clamping surfaces 6 and 7. At this time, the pushing parts of the chucks 4, 5 and 5 are elastically deformed, and are pushed onto the chuck faces 6, 7, and 仏 + generates friction on the end faces of the chucks 4, 5 and 5 to brake the chucks 4, 5, and Mandrel. The% contact causes external force to be applied to the workpiece during machining, and the table 3 can be maintained at a predetermined position regardless of the backlash existing in P. The thief claimed that in order to rotate the table 3, the air pressure in the air pressure chamber 丨 0 may be released. As a result, the pressure acting on each clamping piston 8 is also released, and the pressure is released, and each of the chucks 4, 5 is returned to its original position with the force of 9 $ S that it has. The parts contacted by the faces 6 and 7 are away from each other and lose their friction. As a result, the worktable 3 turns to be able to rotate. In addition, as shown in FIG. 2, the compression springs 3, 5, 36 are stored in

526112 V. Description of the invention (6), the majority of the concave compression springs 35, 36 formed in the circumferential direction at the upper part of the 6 and 7 each of the clamping pistons 8 and 9 are directed inwardly, and the direction of the stop ring 37 is entered. If it is energized, a predetermined gap can be maintained between the clamped pistons 4, 5 and clamped pistons 8, 9 between non-^ = persons, because the chuck contact will be more ideal. This structure makes it non-braking. Therefore, the two are not connected. 8, 9 compresses the chucks 4, 5 against the compression impulse 3 5, and each of the depressing pistons presses onto the clamping surfaces 6, 7 but compresses. The capacity of the springs 35 and 36 and the capacity of the springs 35 and 36 are still two compared to the force exerted on each of the chucks 4 and 5, which is a problem in terms of operation. Because of its small size, the two chucks 4 are not configured in the case of this embodiment, and there is only one air pressure chamber. The i-type brake can also be used, so it is the same as the previous technology. Using a 2 efficiency pass can get about twice the braking effect. In comparison, in addition, by miniaturizing the design of the chuck and making the disk, even in a small rotary table, a clamping device with a large-scale brake function can be mounted on it. . That is to say, a large chuck with a diameter of 20 Cm is in contact with an outer diameter of 20 (^ and inner j °, the condition of the ring-shaped clamping surface, and a diameter of 15 cm (that is, only the diameter of the above cm) The small chuck is in contact with a ring with an outer diameter of 丨 5 cm, where +2 > ^ ^ 1 is a 13cm ring ίί? Intersection, and suppose each chuck is pushed to the push of each chuck surface = The friction coefficients on the contact surfaces are the same, that is, on the shaft periphery: the friction torque of the bearing, which is proportional to the product of the contact area and the half of the axis from the point of action. Therefore, the friction torque ratio of the two is: (Friction torque of small diameter chuck)

89117543.ptd

DZOUJ V. Description of the invention (7) / (Friction torque of large-diameter chuck (2〇2-1δ2 9.5 丨 0.5: upper 152): Is the force the friction torque of large-diameter chuck, because of small-duty chuck? The friction twist chuck can be obtained with; = 2 = half, so use two pieces of small diameter. In addition, although the above needles; =: friction torque. It can also be increased to three pieces with two pieces + chuck. It will be explained, but it will also be improved. However, due to the increase in the number of chucks ^ Pf, its efficacy is even more suitable for three pieces ^ two restrictions, and the number of chucks is second, as a deformation case, the use of inflammation Clamp the cylinder! Instead: See the second and third embodiments and disclose the second embodiment. The plug 8 is inserted into the mandrel 2 to send the first clamp frame body already described in the example and faces the inner surface of the body. Axial side = embedded in the tightly-cylinder cylinder 11 and the block 12 with a 0-ring 47 inserted together: aerodynamically configured and sandwiched between two or three or even ten, even if The same effect as the configuration example. In addition, you can also get the same shape as the first implementation on each chuck. On the chucks, as in the first embodiment, each 1Υ_10 'is constructed as much as the pressure chamber 10 described above, so that it is ideal to reduce the space occupied by the air between the chucks, which is ideal. Cost, and can save [effect of the invention] As described above, 'the majority is arranged according to the fixed interval of the present invention; leave r = h in the direction of the axis of the mandrel and use each ;;: faces', which are opposed to each other, so the All braking effects can be added up :: Force is page 10 \\ 312 \ 2D-CODE \ 89.11 \ 89li7543.ptd 526112 V. Description of the invention (8) It can also be loaded on the rotating table with sufficient clamping force [Description of component number] 1 Frame body 2 Mandrel 3 Table 4 1st chuck 5 2nd chuck 6 1st clamping surface 7 2nd clamping surface 8 1st clamping piston 9 2nd clamping Tight piston 10 Pneumatic chamber 11 Clamping cylinder 12 Block 20 Bearing 22 Worm gear 23 Worm 24 Housing 25 Oil seal 26 Oil seal 31 Bolt 32 Bolt 33 Bolt 34 Bolt

\\ 312 \ 2D-CODE \ 89-ll \ 89117543.ptd Page 11 526112 V. Description of the invention (9) 35 Compression spring 36 Compression spring 37 Contact ring 41 Stepped surface 42 Hub end face 43 Pass-through 44 Round Braking section 4 5 Round braking section 46 0-ring 4 7 0-ring 48 0-ring 49 Vent hole 60 Rotary table 70 Clamping device ❿

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89117543.ptd Page 13

Claims (1)

yibin —E 89i] 7543_ 月 E 6. Application scope— 1 · A clamping device for a rotary table, which is composed of a mandrel of a rotatable body and fixed on the end of the mandrel: △ teeth The frame is composed of a driving device for rotating and driving the mandrel, and the == and 有 will be: /, the symbol m includes a plurality of disks, and a predetermined interval is left toward the axis of the mandrel. The shaft rotates integrally; most of the clamping surfaces are respectively on the side bodies of the above-mentioned chucks; and they are formed on the frame braking mechanism to push the above-mentioned chucks onto the 2. 2. If the scope of application for patent i item ^ &Quot; Zhuang \ Jian nianganshang / The above braking mechanism includes [formed in the above mandrel = middle 2 fluid 1 chamber; a ring that supplies pressure fluid to the fluid pressure and is arranged in the fluid The pressure chamber and its corresponding chuck, = version i, and the corresponding part, ΐ Ϊ 3 'follow the flow in the fluid pressure chamber; heart: the second block, to the chuck. It is pushed on top of the earth's force. 3. If the second braking mechanism mentioned in the patent application scope, the above-mentioned braking mechanism includes a clamping device of 疋 牦 σ, among which 苐 1 clamps the piston in the above-mentioned mandrel, 1 It consists of a penetrating portion that is penetrated between the chucks facing upwards and / or connected to one end of the penetrating portion and extends in the axial direction of the mandrel; D. The circle extending in the radial direction of the mandrel and the second clip The tight piston is composed of a 51-shaped circular garment extending in the radial direction, the penetrating portion and the fluid pressure chamber formed in the eight-moving portion; " U, the vehicle contacts the outer periphery of the circular braking portions 89] H543. Ptc Page 14 526112 ^ Case No. 89117543 _ month and month amends_ VI. Between the main body of the patent application and the first and second clamping pistons mentioned above; and the supply unit to supply pressure fluid into the fluid pressure chamber The clamping surface is formed on the frame body in a manner opposite to the chuck on the opposite side of the braking mechanism. 4. For the clamping device of the rotary table as claimed in item 1 of the scope of patent application, wherein: 丄 the above-mentioned driving device is composed of a worm gear mechanism which gives non-reversible rotation to the mandrel. 5. For the clamping device of the rotary table as described in the second item of the patent application, wherein the above pressure fluid is air. 6. For the clamping device of the rotary table as described in the second item of the patent application, wherein the above pressure fluid is oil. 89117543.ptc Page 15