KR101897794B1 - Clamping device for fixing position of workpiece - Google Patents

Abstract

The present invention relates to a clamping device to fix a workpiece. According to the present invention, a workpiece clamping device comprises: a rotational divided plate connected to a rotary shaft for rotating a workpiece and having a divided gear tooth with a constant pitch formed on an outer ring; and a clamping means disposed on one side of the rotational divided plate and having a clamping gear tooth engaged with the divided gear tooth to fix the rotational divided plate. A brake means closely adhered to a surface of the rotational divided plate to stop rotation of the rotational divided plate is disposed on the front surface of the rotational divided plate. A clamping adjustment means to horizontally move the clamping gear tooth is disposed on the lower side of the clamping means. Accordingly, when the rotational divided plate is rotated by an angle of integer times than the pitch of the divided gear tooth, the brake means and the clamping means are operated to fix the rotational divided plate. When the rotational divided plate is rotated by other angles, the brake means and the clamping means are operated and, at the same time, the position of the clamping gear tooth is adjusted and fixed by the clamping adjustment means.

Description

[0001] The present invention relates to a clamping device for fixing a workpiece,

The present invention relates to a clamping device, and more particularly, to a clamping device, which is provided in an index table for rotating a workpiece at an angle and position necessary for machining in a machine tool, To a clamping device.

In general, when a workpiece is to be machined by a machine tool such as a drilling machine, a milling machine, or a machining center (MCT), the workpiece is fixed by using a jig fixed to the table, and the tool is rotated or moved to perform machining.

At this time, in order to perform machining work such as hole, counter boring and cutting on the same circumference of the workpiece at a predetermined angle, an index table for rotating the workpiece at a predetermined angle is required.

The machining operation of such a workpiece is required to process increasingly complicated shapes according to the development of the industry. Accordingly, the machining portion of the workpiece having a complex shape is rotated at a predetermined angle so as to be suitable for the operation of the tool, Since the jig and the rotary shaft are fixed so as not to be rotated and the workpiece is processed by the tool, the fixing device for fixing the rotary shaft of the jig is a necessary device in the index table.

Particularly, the machining center is provided with a rotating partition plate which is provided with a main rotation axis for rotating the workpiece up and down and can rotate the workpiece by a required angle so that the workpiece can be fixed at a desired angle and position, Is mounted.

1 is a front view showing a conventional partition plate fixing structure disclosed in the following prior art document.

As the rotary shaft 10 rotates about its fixed axis,

The shingling portion 21 is connected to or disconnected from the connection protrusion 2 around the partitioning plate 1 and the center of the rotating shaft 10 is provided on the tangent extension line of the partitioning plate 1 and connected to the partitioning plate 1 A partition plate connection port (20) in which the connection ends of the partition plate fixture (21) coincide; A release spring 30 elastically pressing the spring pressing portion 22 protruded from the partition plate connection port 20 in the direction of releasing the partition plate fixing portion 21 of the partition plate connection port from the partition plate 1, ; And a fixing slide (40) for transmitting or releasing a pressing force for connecting the divided plate fixing part (21) of the partitioning plate connection port to the connection projection (2) of the partitioning plate as it is moved up and down. It is possible to improve the life of the apparatus by minimizing the damage of the connection protrusion of the partition plate and the partition plate connection port and to improve the accuracy of the processing and stability .

However, in this case, since the connection port of the partition plate is coupled out of the center axis of the partition plate in the direction of the arc, severe uneven wear occurs in the teeth, which causes backlash and low accuracy. Also, the release spring is frequently used and the function of the springs is deteriorated.

2 is a cross-sectional view showing a conventional jig fixing device for indexes disclosed in the following two prior art documents.

A rotary type gear 11a of a clutch type protruding to one side is formed on the front surface of the vertical synchronous body 7 fixed to the vertical rotary shaft 7 of the jig 2 or the horizontal rotary shaft 6 of the index table horizontal bracket 5 The fixed plate 12 is fixed by the fixing bolt 12a so as to be spaced apart from the index table 1 by a predetermined distance and the teeth 11a of the fixed plate 12 are connected to the rotary gear 11a of the rotary plate 11, And a fixed gear 13a spaced apart from each other are formed integrally with the stationary plate 12 by the cylinder 14 in which the stationary plate 12 is inserted. Is provided with several needle bearings (15) so as to linearly reciprocate in the axial direction of the rotary shaft (7) or the horizontal rotary shaft (6), and the inner groove (18) of the position fixture (13) and the position fixture Both ends are resiliently supported on the support bolt 19 fixed to the fixed plate 12 The elasticity spring 17 is used to more firmly fix the jig 2 while minimizing damage to the rotary gear 11a and the fixed gear 13a and to prolong the life of the jig 2 fixing device 10. [ The rotary plate 11 is fixed in the axial direction so that the vertical rotary shaft 7 or the horizontal rotary shaft 6 does not need to be tight and the jig 2 can be fixed at a desired position, can do.

However, in this structure, the rotating plate and the two face gears of the position fixture are in close contact with each other to operate as a clutch. In order to control the angle of the fine teeth, the number of rotations of the rotary plate and the number of fixed teeth of the position fixture must be increased.

The prior art is a structure in which the outer ring gear teeth are formed on the partition plate, and the division accuracy (rotation angle division performance) is also determined by the number of gear teeth. In the case of a partition plate of the same size, the larger the gear teeth, the more stable the rotation of the partition plate by a small angle.

For example, if the gear value is 360, it is possible to rotate the dividing plate in units of 1 deg. If it is 720 pieces, it is possible to rotate the divided plate in 0.5 degree increments.

However, as the number of gears or gears increases, the accuracy of division increases. However, gear processing time is increased and wear of gears increases, resulting in a shorter replacement period and, of course, cost increase.

In addition, when machining an actual workpiece with high accuracy, it is necessary to rotate at an accurate angle. If the rotation angle is not equal to the basic division angle of the partition plate, that is, There is a serious problem falling.

For example, if the angle of rotation required for the workpiece to be machined is 91.3˚, the splitter plate should be rotated to 91.3˚ and clamped with clamping means. However, when the gear teeth of the partition plate are 360, it is necessary to rotate at either 91 ° or 92 °, so that it is difficult to completely engage with the gear teeth of the clamping unit, which causes complete clamping and error in machining.

(Prior Art 1) Korean Registered Patent No. 10-0627833 (Sep. 18, 2006) " (Prior Art 2) Korean Registration Practice 20-0456169 (October 10, 2011) "Jig Fixing Device for Index Table" (Prior art 3) Korean Registered Patent No. 10-1346464 (December 23, 2013) "High-speed and high-efficiency NC index table"

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a clamping device and a brake device that fix and operate when a split rotary plate, The clamping means, the brake means, and the separate clamping adjusting means are further operated to complement the incomplete engagement state of the split rotary plate, thereby providing a clamping device for fixing the workpiece position .

According to another aspect of the present invention, there is provided a workpiece position clamping apparatus comprising: a rotary partition plate coupled to a rotary shaft for rotating a workpiece, the partition plate having a predetermined pitch at an outer ring; And a clamping means for clamping the rotary partition plate so as to be coupled to the rotary partition plate, wherein the rotary partition plate is brought into close contact with the rotary partition plate, The clamping means is provided on the lower side of the clamping means so that the clamping gear can be moved laterally. When the rotary partition plate rotates at an integral multiple of the pitch of the dividing element pitches, And the clamping means are operated to fix the rotary partition plate, and the angle The brake means and the clamping means are operated and the position of the clamping gear teeth can be adjusted and fixed by the clamping adjusting means.

The braking means includes a friction disk coupled to the front face of the rotary partition plate, a fixed plate spaced apart from the rotary partition plate, a disc-shaped reciprocating plate provided between the friction disc and the fixed plate, A brake cylinder inserted in the fixed plate to reciprocate the reciprocating plate, and a brake pad attached to the surface of the reciprocating plate and in close contact with the friction disk to fix the rotary partition.

A restoring spring may be interposed between the reciprocating plate and the fixing plate so that the brake pad is spaced apart from the friction disc.

The clamping unit may include a clamping block having an arcuate tooth meshing surface having a curvature equal to a curvature of the rotary diaphragm and clamping gear teeth having the same pitch as that of the dividing gear on the tooth meshing surface, A clamping cylinder reciprocating to engage the clamping gear with the divider element, and a guide pin guiding the reciprocating motion of the clamping block.

The clamping unit may include a guide rail horizontally provided below the clamping unit, a guide block coupled to a lower portion of the clamping unit and seated on the guide rail, And a fixed cylinder which is provided to press and fix the clamping unit.

According to the present invention configured as described above, when the split rotary plate for determining the rotation angle and position of the jig for fixing the workpiece for accurate machining of the workpiece rotates at an integral multiple of the pitch of the splitter pitch, only the clamping means operates, And in the case of rotating at an angle that is not an integral multiple, the separate breaking means in addition to the clamping means is further controlled to be operated so that the clamping of the split rotary plate can be completed in any case. Therefore, there is an advantage that the machining error can be minimized.

Further, the wear due to the coupling state of the splitter teeth and the clamping gear teeth can be reduced, and the lifetime of the apparatus can be increased.

1 is a front view showing a conventional divided plate fixing structure
2 is a sectional view showing a conventional jig fixing device for an index
3 is a cross-sectional view showing an index including a workpiece position clamping device according to an embodiment of the present invention
4 is a front view showing a workpiece position fixing clamping device according to an embodiment of the present invention;
Fig. 5 is a side view of the present invention shown in Fig. 4
6 is a cross-sectional view showing a coupling state of a clamping gear tooth and a divider value according to the rotation angle of the rotation dividing plate
Fig. 7 is a diagram showing the operating state of the brake means of the present invention
8 is a diagram showing an operating state of the clamping adjusting means of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

For a better understanding of the present invention, the description with reference to the drawings is not intended to limit the scope of the present invention. In the following description, a detailed description of related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

The present invention relates to a workpiece position fixing clamping device which is included in an index on which a jig for fixing a workpiece is fixed when machining a workpiece in a machine tool, and which can be rotated at a required angle of the workpiece, will be.

First, in order to facilitate understanding of the present invention, the index will be briefly described with reference to FIG. 3 is a sectional view showing an index including a workpiece position fixing clamping device according to an embodiment of the present invention.

An index table 500 in which both ends are fixed to both sides of a horizontal rotation axis 400 installed so as to be opposed to the left and right sides of the support frame 300 on both sides, And a jig 700 fixed to the upper end of each of the vertical rotation shafts 600 to clamp the workpiece.

The horizontal rotation axis 400 and the vertical rotation axis 600 are rotated by an angle necessary for machining the workpiece and then fixed completely so as not to move so that the position and angle of the workpiece can be maintained during machining of the workpiece. The clamping device 100 is installed. At this time, the horizontal rotation axis 400 and the vertical rotation axis 600 can be rotated by a certain angle by a separate controllable rotation motor (servo motor, not shown).

FIG. 4 is a front view of a workpiece position clamping apparatus according to an embodiment of the present invention, and FIG. 5 is a side view of the present invention shown in FIG.

The workpiece position fixing clamping apparatus 100 according to the present invention may be configured to include a rotation partition plate 110, a clamping unit 120, and a brake unit 130.

First, the rotation-dividing plate 110 is a spur gear and a plurality of divider teeth 110a are formed on the outer ring. The rotary partition plate 110 may be coupled to the vertical rotary shaft 600 or the horizontal rotary shaft 400 by a fastening bolt 111 and may be controlled to rotate at a predetermined angle by a separate rotary motor (not shown).

The divider element 110a formed in the rotary divider 110 divides the circumference at a constant pitch at a constant pitch. That is, the pitch corresponds to the minimum division angle.

For example, when the number of divider teeth 110a is 360, the pitch becomes 360 degrees / 360 and becomes 1 degree. That is, the minimum division angle becomes 1 degree, and the rotation division plate 110 can be controlled to rotate by 1 degree. Therefore, it is possible to rotate at an integral multiple of 1 degree.

In the case of the present invention, the number of the divider devices 110a is 192, and a pitch (minimum division angle) of 360 deg. / 192 = 1.875 deg. Can be used.

This is obtained through a long trial and error. If the number of divider teeth 110a is 192 or more, the minimum division angle becomes small to increase the rotation angle accuracy, but the number of divider teeth 110a becomes too large, It is very difficult to do. Since the dividing device 110a is small, there is a problem that abrasion increases in a short period of time.

On the other hand, if the number of divider devices 110a is set to be smaller than 192, there is a problem that the minimum division angle increases and the accuracy of the rotation angle decreases. This causes an error in the angle and positioning of the workpiece, resulting in a machining error.

Next, the clamping means 120 will be described.

The clamping unit 120 is installed adjacent to one side of the rotary partition plate 110 to fix the rotary partition plate 110.

Specifically, the clamping unit 120 includes a clamping block 121 having a clamping gear tooth 121a, a clamping cylinder 122, a guide pin 123, a cylinder block 124, a needle bearing 125, (126).

The clamping block 121 is provided adjacent to one side of the outer ring of the rotary partition plate 110 and can be reciprocally slidable to advance or retract toward the rotary partition plate 110. The width of the clamping block 121 is smaller than that of the rotary partition plate 110, As shown in FIG.

The clamping surface of the clamping block 121 facing the divider element 110a of the rotary divider 110 may have a curved surface. Preferably, the clamping block 121 has a curvature equal to the curvature of the rotary divider 110 And may be formed in a circular arc shape. The clamping block 121 has a plurality of clamping gear teeth 121a.

At this time, the clamping gear teeth 121a may have the same pitch so as to exactly match the dividing teeth 110a.

In addition, the center line of the clamping block 121 should be aligned with the center of the rotary parting plate 110 so that the tooth surface may be in close contact with the outer ring of the rotary parting plate 110.

Of course, although not shown, the mating surfaces of the clamping block 121 may be a flat surface such as a rack, not a curved surface, and the clamping gear teeth 121a may be arranged horizontally side by side.

Meanwhile, the clamping block 121 is reciprocally driven by the clamping cylinder 122.

The clamping cylinder 122 is installed in the cylinder block 124 and connected to the clamping block 121 to reciprocate the clamping block 121. A hydraulic pressure supply port 122a for supplying hydraulic pressure to the clamping cylinder 122 is formed at one side of the cylinder block 124. [

At this time, the guide pin 123, which guides the clamping block 121 so as not to deviate from the reciprocating path, is provided to connect the cylinder block 124 and the clamping block 121. More specifically, the guide pin 123 is fastened to a fixing bolt 126 coupled to the cylinder block 124, and the guide pin 123 is slidably connected to the clamping block 121. A needle bearing 125 may be interposed between the clamping block 121 and the guide pin 123.

Therefore, when the clamping block 121 is advanced by the driving of the clamping cylinder 122 after the rotation of the rotary partitioning plate 110 by a predetermined angle and the fitting surface is brought into close contact with the outer ring of the rotary partitioning plate 110, The divider gear 110a and the clamping gear teeth 121a are completely engaged. The clamping block 121 is supported by the cylinder block 124 so as not to move left and right.

Next, the break means 130, which is one of the technical features of the present invention, will be described.

The brake 130 is a means for braking the rotary parting plate 110 primarily before clamping the rotary parting plate 110 by the clamping unit 120.

Specifically, the brake unit 130 may include a friction disc 131, a fixed plate 132, a reciprocating plate 133, a brake cylinder 134, and a brake pad 135.

The friction disk 131 has a circular plate-like configuration that is coupled to the front surface of the rotary partition plate 110. That is, the rotary parting plate 110 may be coupled to the rotary shaft of the machine tool at the rear side and the friction disk 131 may be coupled to the opposite side.

The friction disc 131 may be fastened with a fastening bolt 111 so as to be replaceable.

The friction disc 131 may be made of a metal material, and may be made of cast iron or cast steel excellent in abrasion resistance and crack resistance. Since the friction disc 131 can be installed using an established product, the friction disc 131 can be easily replaced.

The fixing plate 132 is spaced apart from the rotary partition plate 110 and is fixed in a circular plate shape.

That is, a brake operation space may be formed between the fixed plate 132 and the rotary partition plate 110. The brake operating space is formed to be larger than the width of the reciprocating plate 133, and the clearance L allows the reciprocating plate 133 to reciprocate by a large space.

A reciprocating plate 133 is provided in the brake operating space. The reciprocating plate 133 is interposed between the friction disc 131 and the fixed plate 132.

At this time, the reciprocating plate 133 is coupled to the fixing plate 132, and is fastened by the fixing pin 137 so as to be reciprocated from the fixing plate 132.

The fixing pin 137 penetrates the fixing plate 132 and protrudes toward the reciprocating plate 133 and is inserted into the needle bearing 137a inserted through the reciprocating plate 133, Are slidably engaged.

Therefore, since the reciprocating plate 133 can reciprocate from the fixed plate 132, it can advance to the friction disk 131 side or move back to its original position.

Preferably, at least one of the fixing pin 137 and the needle bearing 137a may be provided along the circumference of the fixing plate 132 and the reciprocating plate 133.

A brake cylinder 134 may be installed in the fixed plate 132 to reciprocate the reciprocating plate 133.

The brake cylinder 134 may be a hydraulic cylinder, and a hydraulic pressure supply port 134a through which hydraulic pressure can be supplied is formed at one side.

It is preferable that a plurality of brake cylinders 134 are also provided to uniformly apply a pressing force to the entire surface of the reciprocating plate 133. And may be arranged at regular intervals along the circumference of the fixing plate 132 as shown in FIG.

A brake pad 135 is embedded in the reciprocating plate 133.

The brake pad 135 may be provided in at least one manner to cause braking while being in surface contact with the friction disc 131. As shown in the figure, a plurality of the first and second plates may be arranged at regular intervals along the circumference of the reciprocating plate 133.

At this time, it is preferable that the brake pads 135 are disposed so as to overlap with the brake cylinders 134. In this case, the pressing force applied by the brake cylinders 134 is directly applied to the brake pads 135 It can be delivered.

A restoring spring 136 may be further provided between the reciprocating plate 133 and the fixing plate 132.

The restoring spring 136 is configured to restore the returning plate 133 to its original position after the reciprocating plate 133 is brought into close contact with the friction disc 131 by the brake cylinder 134. That is, since the brake cylinder 134 is configured to discharge the hydraulic pressure through the hydraulic pressure supply port 134a, the hydraulic pressure is discharged by the restoring force of the return spring 136, and the reciprocating plate 133 is returned.

For this, a spring groove 136a into which the restoration spring 136 can be inserted may be formed at a position corresponding to the reciprocating plate 133 and the fixing plate 132.

And a spring fixing bolt 136b inserted into the fixing plate 132 and the reciprocating plate 133 at the same time to guide and support the return spring 136. [

Accordingly, when the reciprocating plate 133 is operated, the restoring spring 136 is pulled, and the reciprocating plate 133 is returned to its original position by the restoring force. In addition, the reciprocating plate 133 is brought into a state of being in tight contact with the fixed plate 132 so as to maintain a state away from the friction disc 131.

Next, the clamping adjustment means, which is another technical feature of the present invention, will be described.

The clamping adjusting means 140 operates when the clamping gear teeth 121a and the divider teeth 110a are not correctly engaged with each other. The clamping adjusting means 140 moves the clamping means 120 leftward and rightward, 121a and the dividing device 110a so as to be fixed so as not to move.

As described in the background art, since the divider element 110a of the rotary parting plate 110 has a constant pitch, when the rotation parting plate 110 is rotated by an angle corresponding to an integral multiple of the pitch, (121a) and the divider device (110a) are completely engaged to complete clamping.

However, when the rotary parting plate 110 needs to be rotated at an angle that is not an integer multiple of the pitch, there is a high possibility that the clamping gear teeth 121a and the divider teeth 110a are not correctly engaged.

In this case, since the clamping state of the rotary partitioning plate 110 may be released or loosened, the clamping state can be supplemented by using the clamping adjustment means 140 as an auxiliary.

Specifically, the clamping adjustment means 140 may include a guide rail 141, a guide block 142, and a fixed cylinder 142.

The guide rails 141 are provided below the cylinder block 124 of the clamping unit 120, and a pair of the guide rails 141 may be installed horizontally and parallel.

A guide block 142 is slidably provided on the upper surface of the guide rail 141 so as to be reciprocatable right and left along the guide rail 141.

The guide block 142 may be mounted on the guide rail 141 and two guide rails 141 may be provided at both ends of the guide rail 141. In other words, a total of four guide blocks 142 are provided, each of which is engaged with the lower surface of the cylinder block 124.

Accordingly, the cylinder block 124 is slidably reciprocated along the guide rails 141.

In addition, fixed cylinders 142 are installed on both sides of the cylinder block 124 of the clamping unit 120 at predetermined intervals. At this time, the rods of the fixed cylinders 142 are arranged to face the cylinder block 124.

Therefore, when the rod of both the fixed cylinders 142 is advanced, the cylinder block 124 is pressed. When the cylinder block 124 stops in this state, the cylinder block 124 is fixed between the two rods, It can not move along.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 6, 7 and 8. FIG.

Fig. 6 is a cross-sectional view showing a state in which a splitter gear and a clamping gear tooth according to the rotation angle of the rotation dividing plate are engaged with each other. Fig. 6A shows a case where the rotation splitter plate is rotated at an integral multiple of the splitter pitch, Represents a case where the rotary partition plate is rotated at an angle other than an integer multiple of the pitch of the divider pitch. And Fig. 7 is an operating state view of the brake means of the present invention, and Fig. 8 is an operating state view of the clamping adjusting means of the present invention.

6A, only the brake 130 and the clamping unit 120 are controlled to operate when the divider gear 110a and the clamping gear teeth 121a are correctly engaged with each other.

Specifically, when the rotary parting plate 110 rotates at an integral multiple of the pitch of the dividing unit 110a, the brake unit 130 firstly operates to primarily brake the rotary parting plate 110. [ That is, when hydraulic pressure is supplied to the brake cylinder 134 of the brake unit 130 so that the brake cylinder 134 is driven, when the reciprocating plate 133 advances and contacts the friction disc 131, (135) is brought into close contact with the surface of the friction disc (131).

The hydraulic pressure is supplied to the clamping cylinder 122 so that the clamping block 121 advances and approaches the outer ring of the rotary partitioning plate 110 so that the clamping gear teeth 121a engage with the dividing element 110a And is completely adhered.

Therefore, the rotary parting plate 110 is completely fixed by the brake 130 and the clamping unit 120 so that the jig 700 is not moved, and the workpiece is processed in this state. When the machining operation is completed, the clamping cylinder 121 is returned and the clamping block 121 is moved backward so that the clamping gear teeth 121a and the divider gear 110a are released. When the brake cylinder is returned, 133) is also released, the braking is released.

6 (b), it is difficult to accurately align the clamping gear teeth 121a with the splitter teeth 110a. In other words, when the rotation splitting plate 110 is rotated at an angle that is not an integral multiple of the pitch of the splitter teeth 110a When it is necessary to rotate, the clamping adjustment means 140 is further operated together with the brake means 130 and the clamping means 120.

Specifically, the brake unit 130 first operates to brakes the rotary partition plate 110 primarily. Although the clamping unit 120 operates in the same manner as described above, the clamping gear teeth 121a and the divider gear unit 110a are incompletely engaged with each other to be in the same state as in (b).

The cylinder block 124 slidably mounted on the guide rail 141 when the clamping cylinder 122 is operated and the clamping block 121 advances, The position is shifted as shown in Fig. 8 in a direction in which it is engaged with the teeth 110a. For reference, the dotted line in FIG. 8 shows the state before the operation of the clamping adjustment means and the solid line shows the state after operation.

That is, since the clamping block 121 can slightly adjust the position to the left or right, the clamping gear teeth 121a and the divider teeth 110a can be completely engaged.

In this state, the rod of the fixed cylinders 142 on both sides is advanced so as to press the cylinder block 124 from both sides so as not to move leftward and rightward, so that the clamping block 121 is moved to the rotation partition plate 110, Lt; / RTI >

In other words, when the clamping gear teeth 121a and the divider teeth 110a are not fully engaged with each other, the clamping adjusting means 140 can completely mate the clamping gear teeth 121a and the dividing gear teeth 110a, Can be achieved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims, as well as the appended claims.

100: workpiece position fixing clamping device 300: support frame
400: Horizontal rotation axis 500: Index table
600: vertical rotation axis 700: jig
110: Rotation partition plate 110a:
111: fastening bolt
120: Clamping means
121: Clamping block 121a: Clamping gear
122: Clamping cylinder 122a: Hydraulic supply port
123: guide pin 124: cylinder block
125: Needle bearing 126: Fixing bolt
130: Brake means 131: Friction disk
131a: fastening bolt 132: fastening plate
133: reciprocating plate 134: brake cylinder
134a: Hydraulic supply port 135: Brake pad
136: restoring spring 136a: spring groove
136b: spring fixing bolt 137: fixing pin
137a: Needle Bearing
140: clamping adjusting means 141: guide rail
142: guide block 143: fixed cylinder
L: Clearance

Claims (5)

A workpiece position clamping apparatus, comprising: a rotary partition plate connected to a rotary shaft for rotating a workpiece, the partition plate having a pitch at a predetermined pitch on an outer ring,
A rotary plate coupled to a front surface of the rotary plate, a fixed plate spaced apart from the rotary plate, a reciprocating plate disposed between the friction plate and the plate, A brake cylinder for reciprocally driving the reciprocating plate, and a brake pad attached to the surface of the reciprocating plate and brought into surface-contact with the friction disk for braking the rotation of the rotary partition plate;
A clamping block having an arcuate tooth meshing surface having a curvature equal to the curvature of the rotary diaphragm and having a clamping gear tooth having the same pitch as the divider tooth on the tooth meshing surface; A clamping cylinder for engaging with the divider element, and a guide pin for guiding the reciprocating drive of the clamping block; And
A guide block which is horizontally disposed below the clamping unit, a guide block which is coupled to a lower portion of the clamping unit and which is seated on the guide rail and is capable of being horizontally conveyed, and a guide block provided on both sides of the clamping unit, And clamping adjusting means for moving the clamping gear teeth horizontally, including a fixed cylinder to be fixed,
When the rotary partition plate rotates at an integral multiple of the pitch of the divider pitch, the brake means and the clamping means are operated to fix the rotary partition plate, and when the rotary partition plate is rotated at an angle other than the predetermined angle, the brake means and the clamping means are operated, And the position of the clamping gear teeth is adjusted and fixed by the adjusting means. delete The method according to claim 1,
And a restoring spring is interposed between the reciprocating plate and the fixing plate so that the brake pad is spaced apart from the friction disk. delete delete

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