CN116713773A - Clamping tool for part machining - Google Patents

Abstract

The application provides a clamping tool for part machining, which comprises the following components: a bottom plate on which a loading table is arranged; the clamping assembly comprises two bearing piles and folding plates, wherein the bearing piles are symmetrically arranged and are used for bearing semicircular arc-shaped devices to be processed, the folding plates are symmetrically arranged and are arranged on the loading table in a sliding manner; the driving assembly comprises climbing racks and double-end cylinders, wherein the climbing racks are two, the upper ends of the climbing racks are respectively connected with one ends of the two bearing piles and are radially moved along the semicircular arc devices, the climbing racks are matched with the climbing gears, the climbing gears penetrate through the rotating shafts, power gears penetrate through the rotating shafts, the power gears are matched with the power gears, the power racks are connected to the surfaces of the folded plates, the lower end surfaces of the folded plates are connected with the double-end cylinders, and the double-end cylinders are arranged on the upper surfaces of the loading tables. The clamping of semicircular arc-shaped devices with different radiuses is realized by utilizing the folded plates which can move relatively and the bearing piles which are arranged along the circumference and have adjustable radial positions, so that the stability and the economy during precision processing are improved.

Description

Clamping tool for part machining

Technical Field

The application belongs to the field of precision machining of devices, in particular to a clamping process for machining devices, and particularly relates to a clamping tool for machining parts.

Background

When the device is precisely machined, the machining object is required to be fixedly clamped, so that the device is ensured not to be displaced during machining. For conventional devices, the fixing method mostly comprises a die method and a clamping method, wherein the die method is to customize a die for fixing the device for the device to be processed, and the clamping method is to complete clamping and fixing of devices of different types by using an instrument with adjustable length.

When precisely processing the inside of a cylindrical device, the device is often required to be cut in half, and the cut semicircular arc-shaped part is fixed by adopting a clamping method or a die method; the common clamping method is difficult to clamp the semicircular cambered surface of the device, the custom mold is troublesome, the economic benefit is low, and the clamping method cannot adapt to cylindrical parts of various types.

Disclosure of Invention

In order to solve the defects of the related prior art, the application provides a clamping tool for part machining, which utilizes a folded plate capable of relatively moving and a bearing pile which is arranged along the circumference and has adjustable radial positions to realize the clamping of semicircular arc-shaped devices with different radiuses, and improves the stability and the economy during precision machining.

In order to achieve the object of the application, the following scheme is adopted:

clamping tool for part processing, comprising:

a bottom plate, on which a loading table in a cuboid shape is arranged;

the clamping assembly comprises two bearing piles and folded plates, wherein the bearing piles are symmetrically arranged below the upper end layout of the folded plates and horizontally arranged along the width direction of the bottom plate, the pile surfaces of the clamping assembly are used for bearing semicircular arc-shaped devices to be processed, the folded plates are symmetrically arranged, the cross sections of the folding plates are C-shaped, and the folding plates are slidably arranged on the loading table along the length direction of the bottom plate; when in bearing, the semicircular arc-shaped device is parallel to the width direction of the bottom plate, the concave surface of the semicircular arc-shaped device faces upwards, the two end faces of the semicircular arc-shaped device are parallel to the bottom plate, the symmetrical surfaces of the two bearing piles are overlapped with the symmetrical surfaces of the semicircular arc-shaped device along the width direction of the bottom plate, and the bottom surfaces of flat plates at the upper ends of the folded plates are attached to the two end faces of the semicircular arc-shaped device;

the driving assembly comprises climbing racks and double-end air cylinders, wherein the climbing racks are two and symmetrically arranged, the upper ends of the climbing racks are respectively connected with one ends of two bearing piles and are arranged along radial movement of the semicircular arc-shaped devices, the climbing gears are matched with the upper ends of the climbing racks, the climbing gears penetrate through the rotating shafts, the rotating shafts are arranged on the bottom plate through the supports, the power gears are further arranged on the rotating shafts in a penetrating mode, the power racks are matched with the lower portions of the power gears, the power racks are connected to the surfaces of the folded plates along the length direction of the bottom plate, the lower end faces of the folded plates are connected with driving shafts of the double-end air cylinders, and the double-end air cylinders are arranged in the center of the upper surface of the loading table.

Further, the periphery of the upper surface of the loading table is provided with a limiting plate, two side surfaces of the folded plate are attached to the limiting plate arranged along the length direction of the bottom plate, and a notch is formed in the center of the limiting plate arranged along the width direction of the bottom plate and used for passing through the power rack.

Further, the bearing pile is also provided with at least one bearing pile which is lower than the layout at the upper end of the folded plate and is arranged around the circle center axis of the semicircular device in an array mode, the number of climbing racks and climbing gears is matched with that of the bearing pile, the climbing gears arranged at the two ends penetrate through the rotating shaft, and the rest climbing gears penetrate through the supporting shaft.

Further, if the number of the bearing piles is even, the rotating shafts and one end of the supporting shaft are respectively provided with rotating wheels, and the rotating wheels at the left half part and the rotating wheels at the right half part are respectively sleeved with a rotating belt for driving the rotating wheels at the two parts to move in the same trend;

if the number of the bearing piles is odd, the rotating wheels are arranged at the center except the rotating wheels arranged at the center, the rotating wheels arranged on the supporting shafts at the center are arranged at one ends of the rotating shafts and the supporting shafts, the rotating wheels arranged on the supporting shafts at the center are arranged at the other ends of the rotating shafts, the rotating wheels at the left half part and the rotating wheels at the right half part are respectively sleeved with a rotating belt, the rotating wheels are also arranged at the other ends of the supporting shafts, which are closest to the other ends of the supporting shafts, of the opposite sides of the gear teeth of the climbing racks arranged vertically at the center, and the rotating belts are sleeved on the rotating wheels at the center.

Further, the climbing rack is arranged on the sliding plate in a sliding manner, the sliding plate is arranged on the opening side of the climbing rail, the climbing rail is arranged parallel to the climbing rack, one end of the climbing rail is connected to the bottom plate, and the other end of the climbing rail is connected to the arc-shaped plate.

Further, a slider is connected to one side of the climbing rack facing the climbing track through a connecting rod, and the slider is slidably arranged inside the climbing track.

Further, bear the weight of the flexible end that the stake other end is connected in the telescopic link, the telescopic link sets up towards the centre of a circle axle of semicircle arc device, and its stiff end is connected in the bottom plate.

Further, the power rack slides and locates the support rail, and the support rail passes through the support column of vertical setting and connects in the bottom plate.

The application has the beneficial effects that:

1. through the cooperation of clamping assembly and drive assembly, use single power supply can accomplish the centre gripping of semicircle arc device in radial and circumference fixedly, and mechanical device is more easily the debugging than electric installation, reduces the unstable factor in the centre gripping in-process when the energy saving, avoids influencing machining effect and yield.

2. The climbing racks are synchronized in movement by utilizing the cooperation of the rotating belt and the climbing gears, so that the bearing columns are always positioned on the same arc, the application range of the lifting device is widened, the semicircular arc parts of different types can be effectively clamped, and the lifting device has higher economical efficiency compared with a die method.

Drawings

The drawings described herein are for illustration of selected embodiments only and not all possible implementations, and are not intended to limit the scope of the application.

Fig. 1 is a perspective view of an embodiment of the present application.

Fig. 2 is a partial view of a rear view of an embodiment of the present application.

Fig. 3 is a partial view of a top view of an embodiment of the present application.

Fig. 4 is a partial view at a in fig. 1 of an embodiment of the present application.

FIG. 5 is a partial view of the cross-sectional view of the B-B side of FIG. 3 in accordance with an embodiment of the present application.

FIG. 6 is a partial view of the cross-sectional view of the C-C side of FIG. 5 in accordance with an embodiment of the present application.

Fig. 7 is a perspective view of an installation position of a feeding device according to an embodiment of the present application.

Fig. 8 is a perspective view of a feeding device according to an embodiment of the present application.

Fig. 9 is a partial view of the embodiment of the present application at D in fig. 8.

The marks in the figure: 1-bottom plate, 11-loading platform, 12-limiting plate, 21-bearing pile, 211-telescopic rod, 22-folded plate, 31-climbing rack, 311-climbing gear, 312-rotating shaft, 313-sliding plate, 314-climbing track, 315-arc plate, 316-sliding block, 317-rotating wheel, 318-rotating belt, 319-supporting shaft, 32-double-head cylinder, 321-power rack, 322-power gear, 323-supporting track, 4-semicircular arc device, 511-tripod, 512-rotating shaft, 513-rotating plate, 521-rolling shaft, 522-pressing shaft, 523-L-shaped rod, 524-first sleeve, 525-second sleeve, 526-screw rod, 527-rotating head.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of the embodiments of the present application will be given with reference to the accompanying drawings, but the described embodiments of the present application are some, but not all embodiments of the present application.

Example 1

As shown in fig. 1, this embodiment provides a clamping tool for part processing, including: a base plate 1, a clamping assembly and a driving assembly.

Specifically, as shown in fig. 1, the bottom plate 1 is rectangular, the upper surface of the bottom plate is provided with a loading platform 11 which is rectangular, the periphery of the upper surface of the loading platform 11 is provided with a limiting plate 12, the horizontal height of the upper end of the limiting plate 12 is higher than that of the upper surface of the loading platform 11, and a notch is arranged at the center of the limiting plate 12 which is arranged along the width direction of the bottom plate.

Specifically, as shown in fig. 1, the clamping assembly includes two bearing piles 21 and folding plates 22, the bearing piles 21 are symmetrically arranged and horizontally arranged along the width direction of the bottom plate 1, the pile surfaces of the bearing piles are used for bearing semicircular arc devices 4 to be processed, the folding plates 22 are symmetrically arranged, the cross section of the folding plates is in a C shape, the folding plates are slidably arranged on the loading table 11 along the length direction of the bottom plate 1, and the two side surfaces of the folding plates are attached to limiting plates 12 arranged along the length direction of the bottom plate 1; when in bearing, the semicircular arc-shaped device 4 is parallel to the width direction of the bottom plate 1, the concave surface is upwards arranged, the two end faces of the semicircular arc-shaped device 4 are parallel to the bottom plate 1, the symmetrical surfaces of the two bearing piles 21 along the width direction of the bottom plate are overlapped with the symmetrical surfaces of the semicircular arc-shaped device 4 along the width direction of the bottom plate, the bearing piles 21 are used for limiting the semicircular arc-shaped device 4 in the radial direction, and the flat bottom surfaces at the upper ends of the folded plates 22 are attached to the two end faces of the semicircular arc-shaped device 4 and used for limiting the semicircular arc-shaped device 4 in the circumferential direction; more specifically, when the clamping assembly is installed, the distance from the upper end of the folded plate 22 to the circular spindle of the semicircular arc-shaped device 4 is smaller than or equal to the distance from the bearing pile 21 to the circular spindle of the semicircular arc-shaped device 4.

Specifically, as shown in fig. 1 and fig. 4, the driving assembly comprises climbing racks 31 and double-headed cylinders 32, wherein two climbing racks 31 are symmetrically arranged, the upper ends of the climbing racks 31 are respectively connected with one ends of two bearing piles 21 and are respectively arranged along the radial movement of a semicircular arc device 4, climbing gears 311 are cooperatively arranged above the climbing racks 31, the climbing gears 311 are coaxially arranged on a rotating shaft 312 in a penetrating manner, the rotating shaft 312 is arranged on the bottom plate 1 through a first bracket, and the first bracket is used for supporting the rotating shaft 312 so that the rotating shaft 312 is always parallel to the width direction of the bottom plate 1; the rotating shaft 312 is also coaxially provided with a power gear 322 in a penetrating way, a power rack 321 is arranged below the power gear 322 in a matching way, the power rack 321 is arranged on a supporting rail 323 in a sliding way, the supporting rail 323 is connected to the bottom plate through a vertically arranged supporting column, the power rack 321 is connected to the surface of the folded plate 22 along the length direction of the bottom plate 1, and more specifically, when the power rack 321 moves to the maximum distance outwards, one end of the supporting rail 323 facing the device does not contact the folded plate 22; the lower end surface of the folded plate 22 is horizontally connected to a driving shaft of a double-head cylinder 32, and the double-head cylinder 32 is arranged in the center of the upper surface of the loading table 11 and is used for driving the folded plate 22 to reciprocate along the length direction of the bottom plate 1; more specifically, the driving assembly is further used for ensuring that the radial displacement distance of the bearing pile 21 and the displacement distance of the folded plate 22 along the length direction of the bottom plate 1 are always equal.

Preferably, as shown in fig. 3 and 6, the climbing rack 31 is slidably arranged on the sliding plate 313, and the sliding plate 313 is arranged on the opening side of the climbing rail 314 and is used for supporting and limiting the climbing rack 31 in the vertical direction; the climbing rail 314 is arranged parallel to the climbing rack 31 and is used for limiting the climbing rack 31 in the horizontal direction; the climbing rail 314 has one end connected to the base plate 1 and the other end connected to the arc plate 315.

Preferably, as shown in fig. 3 and 6, a slider 316 is connected to a side of the climbing rack 31 facing the climbing rail 314 through a horizontally arranged connecting rod, the slider 316 is slidably disposed inside the climbing rail 314, and specifically, the slider 316 is limited by the climbing rail 314 to perform only linear movement along the length direction of the climbing rail 314, thereby limiting the movement direction of the climbing rack 31.

Preferably, as shown in fig. 2 and 3, the other end of the bearing pile 21 is connected to the telescopic end of the telescopic rod 211, the circular central axis of the semicircular arc-shaped device 4 of the telescopic rod 211 is coplanar and perpendicular to the circular central axis of the semicircular arc-shaped device 4, and parallel to the climbing rack 31 connected to the same bearing pile 21, the fixed end of the climbing rack 31 is connected to the bottom plate 1, and in particular, the telescopic rod 211 is used for supporting the bearing pile 21 to maintain the horizontal state of the bearing pile 21.

The present example, when applied, may operate as follows:

the semicircular arc device 4 to be processed is horizontally placed on the bearing pile 211 from one end of the telescopic rod 211, the double-head cylinder 32 is started, the folded plate 22 is driven to move inwards, meanwhile, the power rack 321 is driven to move inwards, one side of the climbing track 314 is taken as a front view angle, the right-end power rack 321 drives the power gear 322 to rotate clockwise, accordingly, the climbing gear 311 is driven to rotate clockwise, the left-end power rack 321 drives the power gear 322 to rotate anticlockwise, the climbing gear 311 is driven to rotate anticlockwise, the climbing gear 311 drives the climbing rack 31 to move linearly towards the center axis of the semicircular arc device 4, the bearing pile 21 is driven to move radially towards the center axis of the semicircular arc device 4, the double-head cylinder 32 is closed when the upper flat bottom surface of the folded plate 22 is attached to two end surfaces of the semicircular arc device 4, and limiting of the semicircular arc device 4 in the radial direction and the circumferential direction is completed through limiting of the folded plate 22 and the bearing pile 21, and processing can be performed.

Example 2:

as shown in fig. 1 to 6, as a further preferable embodiment of the present application, there may be a plurality of bearing piles 21 arranged in an array around the center axis of the semicircular arc-shaped device 4 on the basis of embodiment 1, for further stable clamping, and in this example, five bearing piles 21 are provided in total.

Specifically, as shown in fig. 1, 3 and 4, when there are a plurality of bearing piles 21, the number of climbing racks 31 and climbing gears 311 is matched with that of the bearing piles 21, and two climbing gears 311 positioned at the most edge penetrate through a rotating shaft 312 to provide power for the rest climbing gears 311; the rest of the climbing gears 311 penetrate through the support shafts 319, the support shafts 319 are connected to the bottom surface 1 through vertically arranged second struts, the second struts are used for supporting the support shafts 319, and the support shafts 319 can do circular motion around the axes thereof under the restraint of the second struts.

Specifically, as shown in fig. 1, 4 and 5, except for the rotating wheel 317 arranged in the middle, the rotating wheel 317 is disposed at the outer end of the rotating shaft 312 and the supporting shaft 319, the rotating wheel 317 arranged on the supporting shaft 319 in the middle is disposed at the inner end, and a rotating belt 318 is respectively sleeved on the rotating wheel 317 in the left half and the rotating wheel 317 in the right half; the central climbing rack 31 is vertically arranged, one end, opposite to the gear teeth, of the opposite side, facing the inner side of the nearest supporting shaft 319 is also provided with a rotating wheel 317, a rotating belt 318 is sleeved on the rotating wheel 317 and positioned at the central position, and the rotating belt 318 is specifically used for synchronizing the rotation of the rotating wheel 317, so that the rotation of the climbing gear 311 is synchronized, and the circumferential movement rates of the climbing gear 311 are equal.

Preferably, as shown in fig. 4 and 5, if the number of the bearing piles 21 is even, only the rotating shafts 312 and the supporting shafts 319 need to be provided with rotating wheels 317 at the outer ends, and a rotating belt 318 is sleeved on the rotating wheels 317 at the left half and the rotating wheels 317 at the right half respectively.

The present example, when applied, may operate as follows:

when the climbing gear 311 at the edge rotates, the rotating wheels 317 drive the other rotating wheels 317 to rotate at the same speed through the rotating belt 318, so as to drive the climbing gear 311 to rotate at the same speed, thereby driving the climbing rack 31 to do linear motion towards the center axis of the semicircular arc device 4 at the same speed, driving the bearing piles 21 to do radial motion at the same speed, and ensuring that the distance from the axis of each bearing pile 21 to the center axis of the semicircular arc device 4 is equal; when the gear teeth of the climbing rack 31 arranged in the middle face one side, the moving direction and the moving speed of the climbing rack 31 arranged in the middle are consistent with those of the climbing rack 31 arranged in the middle under the constraint of the rotating wheel 317 and the rotating belt 318, so that the distance from the axis of the bearing pile 21 arranged in the middle to the center axis of the semicircular arc-shaped device 4 is ensured to be equal to that of the rest bearing piles 21.

Example 3:

as shown in fig. 7 to 9, as a further preferable scheme of the application, on the basis of embodiment 1, a feeding device of a semicircular arc device 4 is added, and the feeding device comprises a supporting mechanism and a limiting mechanism, wherein the two end surfaces of the semicircular arc device 4 are always positioned on the same plane through the cooperation of the limiting mechanism and gravity, and the feeding device is more accurate and more convenient than manual feeding.

Specifically, as shown in fig. 7 to 9, the supporting mechanism includes two triangular frames 511 and two rotating shafts 512, the two triangular frames 511 are symmetrically arranged, the top ends of the triangular frames are provided with mounting holes, the round spindles of the mounting holes are overlapped with the round spindles of the semicircular arc-shaped devices 4, the rotating shafts 512 are rotatably inserted into the two mounting holes, the rotating shafts 512 are in a cross shape, the outer surfaces of the vertical portions of the rotating shafts 512 are rotatably provided with rotating plates 513, the rotating plates 513 are centrally symmetrical about the central axes of the vertical portions of the rotating shafts 512, the lower surfaces of the rotating plates are attached to two end surfaces of the semicircular arc-shaped devices 4, the two ends of the rotating plates 513 extend out of the two end surfaces of the semicircular arc-shaped devices 4, and screw holes are formed in the vertical portions of the rotating shafts 512 in a penetrating manner.

Specifically, as shown in fig. 7 to 9, the limiting mechanism includes a roller 521 and a pressing shaft 522, the roller 521 has four symmetrical axes along two symmetrical planes of the semicircular arc-shaped device 4, the circular axes of the roller 521 are parallel to the circular axes of the semicircular arc-shaped device 4, and specifically, the axial plane of the roller 521 is made of rubber with high friction coefficient; the opposite ends of the two rolling shafts 521 overlapped by the round mandrel are fixed in a matching way through key grooves, the other ends of the two rolling shafts 521 are rotatably connected with one end of an L-shaped rod 523, the L-shaped rod 523 is rotatably arranged around the center axis of the semicircular arc device 4, the other ends of the L-shaped rod 523 are connected with a first sleeve 524 or a second sleeve 525, more specifically, the L-shaped rods 523 positioned on the same plane are connected with the first sleeve 524 or the second sleeve 525, and the L-shaped rods 523 positioned on different planes are respectively connected with the first sleeve 524 and the second sleeve 525; the first sleeve 524 and the second sleeve 525 are both T-shaped, and each comprise a cylindrical connecting portion and a rotating portion, the rotating portion is coaxial with the rotating shaft 512, the connecting portion is perpendicular to the rotating portion, more specifically, the other end of the L-shaped rod 523 is slidably connected to the connecting portion of the first sleeve 524 through a spring, and the other end 523 of the L-shaped rod disposed on the other side is slidably connected to the connecting portion of the second sleeve 525 through a spring; the first sleeve 524 is slidably disposed along the length direction of the rotating shaft 512, the rotating portion thereof is rotatably sleeved on the rotating shaft 512, two ends of the rotating portion thereof are provided with limiting rings, the rotating portion of the second sleeve 525 is rotatably sleeved on the rotating portion of the first sleeve 524, two ends of the rotating portion thereof are attached to the limiting rings, an annular opening is formed in the middle section of the second sleeve 525 and is used for penetrating through the connecting portion of the first sleeve 524, and more specifically, when the connecting portion of the first sleeve 524 and the connecting portion of the second sleeve 525 are in an original state, the end faces of the connecting portion of the first sleeve 524 and the second sleeve 525 are attached to the horizontal portion of the L-shaped rod 523; the pressing shaft 522 is arranged along the length direction of the rotating shaft 512, a screw rod 526 is rotatably connected above the pressing shaft 522, the screw rod 526 is perpendicular to the pressing shaft 522 and is matched with a screw hole in the rotating shaft 512, the upper end of the screw rod 526 extends out of the rotating shaft 512 and is connected with a rotating head 527, and the rotating head 527 is used for controlling the rotation of the screw rod 526 and further controlling the movement of the pressing shaft 522 in the vertical direction.

The present example, when applied, may operate as follows:

penetrating one end of the semicircular arc-shaped device 4 parallel to a circular mandrel of the semicircular arc-shaped device from between a pressing shaft 522 and a roller 521 on one side, penetrating the pressing shaft 522 and the roller 521 on the other side, twisting a rotary head 527, enabling the pressing shaft 522 to slowly descend, enabling the roller to slowly roll towards two ends along the outer cambered surface of the semicircular arc-shaped device 4, stirring a rotary plate 513 when the two ends are approaching, adjusting the circumferential position of the semicircular arc-shaped device 4, enabling the lower surface of the rotary plate 513 to be simultaneously attached to two end surfaces of the semicircular arc-shaped device 4, continuing twisting the rotary head 527, stopping twisting when the roller 521 contacts the lower surface of the rotary plate 513, and standing the feeding device at the moment, wherein the two end surfaces of the semicircular arc-shaped device 4 in clamping can be located in the same horizontal plane under the action of gravity; specifically, because the friction coefficient of the surface of the roller 521 is larger, the outer arc surface of the semicircular arc-shaped device 4 and the lower surface of the rotating plate 513 are restrained at the same time, and the semicircular arc-shaped device 4 does not fall down; preferably, the restraint position of the roller 521 is close to two ends of the outer arc surface of the semicircular arc device 4, so that the position of the roller 521 is not overlapped with the bearing pile 21 when the semicircular arc device 4 is mounted to the clamping tool for part processing.

Placing the feeding device downwards from the right upper direction of the clamping tool for part processing, respectively positioning the triangular frames 511 at two sides of the length direction of the bottom plate 1, starting the double-head air cylinders 32, and slowly stirring the rotating plate 513 until the folded plate 22 approaches to be parallel to the round mandrel of the semicircular arc-shaped device 4; when the pressing shaft 522 and the bearing pile 21 simultaneously contact the two cambered surfaces of the semicircular arc-shaped device 4, the pushing cylinder is closed, the two rollers 521 coaxially arranged in the key slot matching are pulled out in the opposite directions, and the feeding device is lifted upwards after the rollers are pulled out, so that the semicircular arc-shaped device 4 is installed.

The foregoing description of the preferred embodiments of the application is merely exemplary and is not intended to be exhaustive or limiting of the application. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the application.

Claims (8)

1. Clamping tool for part processing, which is characterized by comprising:

a bottom plate (1) on which a loading table (11) having a rectangular parallelepiped shape is provided;

the clamping assembly comprises two bearing piles (21) and folded plates (22), wherein the bearing piles (21) are symmetrically arranged below the upper end layout of the folded plates (22) and horizontally arranged along the width direction of the bottom plate (1), the pile surfaces of the clamping assembly are used for bearing semicircular arc devices (4) to be processed, the folded plates (22) are symmetrically arranged, the cross sections of the folded plates are C-shaped, and the folded plates are slidably arranged on the loading table (11) along the length direction of the bottom plate (1); when in bearing, the semicircular arc-shaped device (4) is parallel to the width direction of the bottom plate (1) and the concave surface is upwards, the two end surfaces of the semicircular arc-shaped device are parallel to the bottom plate (1), the symmetrical surfaces of the two bearing piles (21) are overlapped with the symmetrical surfaces of the semicircular arc-shaped device (4) along the width direction of the bottom plate, and the bottom surfaces of the flat plates at the upper ends of the folded plates (22) are attached to the two end surfaces of the semicircular arc-shaped device (4);

the driving assembly comprises climbing racks (31) and double-end air cylinders (32), wherein the climbing racks (31) are two in number and symmetrically arranged, the upper ends of the climbing racks are respectively connected with one ends of two bearing piles (21) and are arranged along radial movement of a semicircular arc device (4), the climbing racks (31) are matched with the climbing gears (311), the climbing gears (311) are arranged on a rotating shaft (312) in a penetrating mode, the rotating shaft (312) is arranged on a base plate (1) through a first support, power gears (322) are further arranged on the rotating shaft (312) in a penetrating mode, power racks (321) are arranged below the power gears (322) in a matching mode, the power racks (321) are connected to the surfaces of folded plates (22) along the length direction of the base plate (1), the lower end faces of the folded plates (22) are connected with driving shafts of the double-end air cylinders (32), and the double-end air cylinders (32) are arranged in the center of the upper surfaces of the loading table (11).

2. The clamping tool for machining parts according to claim 1, wherein a limiting plate (12) is arranged on the periphery of the upper surface of the loading table (11), two side surfaces of the folded plate (22) are attached to the limiting plate (12) arranged along the length direction of the bottom plate (1), and a notch is formed in the center of the limiting plate (12) arranged along the width direction of the bottom plate and used for passing through the power rack (321).

3. The clamping tool for part machining according to claim 1, wherein the bearing pile (21) is further provided with at least one bearing pile which is lower than the upper end layout of the folded plate (22) and is arranged in an array around the center axis of the semicircular arc-shaped device (4), the number of climbing racks (31) and climbing gears (311) is matched with that of the bearing pile (21), the climbing gears (311) arranged at two ends penetrate through the rotating shaft (312), the rest climbing gears (311) penetrate through the supporting shaft (319), and the supporting shaft (319) is arranged on the bottom plate (1) through the second support.

4. A clamping fixture for machining parts according to claim 3, wherein if the number of the bearing piles (21) is even, the rotating shafts (312) and one end of the supporting shaft (319) are respectively provided with rotating wheels (317), and the rotating wheels (317) of the left half part and the rotating wheels (317) of the right half part are respectively sleeved with a rotating belt (318) for driving the rotating wheels (317) of the two parts to move in the same trend;

if the number of the bearing piles (21) is odd, the rotating shafts (312) and one end of the supporting shaft (319) are respectively provided with rotating wheels (317) except the rotating wheels (317) arranged in the middle, the rotating wheels (317) arranged on the supporting shaft (319) in the middle are respectively sleeved with a rotating belt (318), one side, opposite to the gear teeth, of the climbing rack (31) in the vertical arrangement is also provided with the rotating wheels (317) at the other end, closest to the supporting shaft (319), of the rotating wheels (317), and the rotating wheels (317) positioned in the middle are sleeved with a rotating belt (318).

5. The clamping tool for machining parts according to claim 1, wherein the climbing rack (31) is slidably arranged on a sliding plate (313), the sliding plate (313) is arranged on the opening side of a climbing rail (314), the climbing rail (314) is arranged parallel to the climbing rack (31), one end of the climbing rail is connected to the bottom plate (1), and the other end of the climbing rail is connected to the arc plate (315).

6. The clamping tool for machining parts according to claim 5, wherein a slider (316) is connected to one side of the climbing rack (31) facing the climbing rail (314) through a connecting rod, and the slider (316) is slidably disposed inside the climbing rail (314).

7. The clamping tool for part machining according to claim 1, wherein the other end of the bearing pile (21) is connected to a telescopic end of a telescopic rod (211), the telescopic rod (211) is arranged towards a center axis of the semicircular arc-shaped device (4), and a fixed end of the telescopic rod is connected to the bottom plate (1).

8. The clamping tool for machining parts according to claim 1, wherein the power rack (321) is slidably arranged on a support rail (323), and the support rail (323) is connected to the base plate (1) through a vertically arranged support column.