CN118617164A - A rotating fixture for a four-axis machine tool and a processing method thereof - Google Patents

Abstract

The present application relates to the field of fixture technology, in particular to a rotating fixture for a four-axis machine tool and a processing method thereof, wherein a workpiece has a plurality of bolt holes for bolts to pass through, including a base, a chassis and a limit assembly, wherein the chassis is rotatably connected to the surface of the base, and the limit assembly includes a plurality of limit seats and a plurality of limit blocks, wherein the plurality of limit seats are connected to the surface of the chassis at intervals, and the limit blocks correspond to and are connected to the limit seats one by one, and the limit blocks correspond to and are embedded in the bolt holes of the workpiece one by one. The arrangement of the chassis, the limit blocks and the limit seats in the present application drives the other surfaces of the workpiece toward the processing end of the four-axis machine tool, and there is no need to remove the workpiece and readjust the position before clamping it with a fixture, thereby reducing the processing steps for the workpiece, shortening the processing cycle for the workpiece, and thus reducing the processing cost for the workpiece.

Description

Rotating fixture for four-axis machine tool and processing method thereof

Technical Field

The present application relates to the field of fixture technology, and in particular to a rotating fixture for a four-axis machine tool and a processing method thereof.

Background Art

Before using a four-axis machine tool to process a workpiece, it is necessary to install a fixture on the processing table of the four-axis machine tool, and then install the workpiece on the fixture to achieve limit positioning, so as to facilitate the processing of the workpiece.

When it is necessary to process other parts of the workpiece, the position of the workpiece is adjusted and then the workpiece is re-clamped using a fixture. Finally, the machine tool processes the workpiece, which requires the design of an extra mold, resulting in waste of the mold, increasing the processing steps of the workpiece, and extending the processing cycle of the workpiece, thereby increasing the processing cost of the workpiece.

Summary of the invention

In order to improve the problem of processing cost of workpieces, the present application provides a rotating fixture for a four-axis machine tool and a processing method thereof.

In the first aspect, the present application provides a rotating fixture for a four-axis machine tool, which adopts the following technical solution:

A rotating fixture for a four-axis machine tool, wherein a workpiece has a plurality of bolt holes for bolts to pass through, comprises a base, a chassis and a limit assembly, wherein the chassis is rotatably connected to the surface of the base, the limit assembly comprises a plurality of limit seats and a plurality of limit blocks, a plurality of the limit seats are connected to the surface of the chassis at intervals, the limit blocks correspond to and are connected to the limit seats one by one, and the limit blocks correspond to and are embedded in the bolt holes of the workpiece one by one; further comprising a plurality of clamping assemblies, wherein the plurality of clamping assemblies are connected to the surface of the chassis at intervals, the clamping assemblies comprise a clamping cylinder, a clamping connecting rod and a clamping block, the clamping cylinder is connected to the chassis The surface of the clamping cylinder piston rod and the rotation axis of the chassis are parallel to each other, one end of the clamping block is rotatably connected to the clamping cylinder piston rod, and the other end of the clamping block can be pressed against the surface of the workpiece to form a limit, one end of the clamping connecting rod is rotatably connected to the surface of the clamping cylinder, and the other end of the clamping connecting rod is rotatably connected to the surface of the clamping block, and the clamping connecting rod is located on the side of the clamping block close to the limit seat. When the clamping cylinder piston rod is extended, the clamping connecting rod guides the clamping block to rotate in the direction close to the workpiece, and the clamping block surface and the limit block surface clamp the two sides of the workpiece to form a limit.

By adopting the above technical solution, when the workpiece needs to be processed, the base is installed on the processing table of the four-axis machine tool, the workpiece is placed on the chassis, the limit blocks correspond to and are embedded in the bolt holes of the workpiece one by one, and the circumferential outer wall of the limit block is pressed against the inner wall of the bolt hole of the workpiece to form a limit, thereby realizing the limit of the workpiece on the chassis. When the processing end of the four-axis machine tool completes processing on one side of the workpiece, the chassis is rotated to drive the other sides of the workpiece toward the processing end of the four-axis machine tool. There is no need to remove the workpiece, readjust the position, and then clamp it with a fixture, which reduces the processing steps of the workpiece, shortens the processing cycle of the workpiece, and thus reduces the processing cost of the workpiece. ; At the same time, when the limit block corresponds to and is embedded in the bolt hole of the workpiece one by one, the chassis is driven to rotate until the machining surface of the workpiece faces the machining end of the four-axis machine tool, the clamping cylinder piston rod extends, and the clamping connecting rod guides the clamping block to rotate in the direction close to the workpiece. The surfaces of the clamping block and the limit block clamp the two sides of the workpiece to form a limit, so that the workpiece is not easy to deviate on the chassis, thereby improving the machining accuracy of the workpiece; when the machining surface of the workpiece is completed, the clamping cylinder piston rod retracts, and the clamping connecting rod guides the clamping block to rotate in the direction away from the workpiece, and the pressing force between the clamping block and the limit block disappears, thereby facilitating the unloading of the workpiece.

Optionally, the base is connected to a positioning assembly, which includes a plurality of positioning blocks, and the plurality of positioning blocks are connected to the surface of the base at intervals around the axis of the chassis, and the side walls of the positioning blocks can abut against the side walls of the clamping cylinder to form a limit.

By adopting the above technical solution, when the chassis rotates to the point where the workpiece processing surface faces the machine tool processing end, the side wall of the positioning block abuts against the side wall of the clamping cylinder to form a limit, making it difficult for the chassis to deflect on the base surface, thereby further improving the processing accuracy of the workpiece.

Optionally, the base is connected to a clamping assembly, which includes an elastic member 1, a clamping piston and a clamping ring bag, the inner ring of the clamping ring bag is connected to the outer periphery of the limit block, the surface of the limit seat is provided with a sliding cavity for the sliding of the clamping piston, the sliding cavity is connected to the inner cavity of the clamping ring bag, one end of the elastic member 1 in the elastic force direction is connected to the bottom wall of the sliding cavity, and the other end of the elastic member 1 in the elastic force direction is connected to the surface of the clamping piston, the elastic member 1 has the elastic force to drive the clamping piston to slide in the direction away from the limit seat, and the end of the clamping piston tends to protrude from the surface of the limit seat, and the bottom surface of the workpiece can abut the surface of the clamping piston.

By adopting the above technical scheme, when the limit blocks are embedded in the bolt holes of the workpiece one by one, the outer ring of the clamping ring bag abuts against the inner wall of the bolt hole of the workpiece, and the end face of the clamping piston abuts against the bottom surface of the workpiece, the clamping piston slides toward the sliding cavity under the pressure of the workpiece, the air pressure in the sliding cavity increases, the sliding cavity is connected to the inner cavity of the clamping ring bag, the air in the sliding cavity enters the inner cavity of the clamping ring bag, the outer ring of the clamping ring bag is pressurized and expanded and clamps against the inner wall of the bolt hole of the workpiece to form a limit, thereby further improving the clamping force between the workpiece and the limit block, thereby ensuring the processing accuracy of the workpiece.

Optionally, the clamping assembly also includes a clamping block, a clamping connecting rod and a clamping rod, the clamping block is connected to the surface of the base, the surface of the chassis is provided with a clamping groove for the clamping rod to slide, one end of the clamping connecting rod is rotatably connected to the surface of the clamping piston, the other end of the clamping connecting rod is rotatably connected to the surface of the clamping rod, the clamping block is connected to the surface of the base, the surface of the clamping block is provided with a clamping cavity for the end of the clamping rod to be embedded in, when the clamping piston slides toward the sliding cavity, the clamping connecting rod receives the power of the clamping piston and drives the clamping rod to approach the clamping cavity, and the end of the clamping rod is embedded in the clamping cavity.

By adopting the above technical scheme, when the workpiece is placed on the chassis, the limit blocks correspond to and are embedded in the bolt holes one by one, and the clamping piston slides toward the sliding cavity under the pressure of the workpiece. The clamping connecting rod receives the power of the clamping piston and drives the clamping rod to slide along the inner wall of the clamping groove toward the clamping cavity. The end of the clamping rod is embedded in the clamping cavity, and the end of the clamping rod presses against the inner wall of the clamping cavity to form a limit, so that the chassis is not easily offset on the base surface, thereby ensuring the machining accuracy of the machine tool on the workpiece.

Optionally, the clamping assembly also includes a positioning rack and a positioning gear, a positioning cavity for the positioning rack to slide is opened on the surface of the clamping block, the sliding direction of the positioning rack and the sliding direction of the clamping rod are perpendicular to each other, the positioning cavity is connected to the clamping cavity, the positioning gear is rotatably connected to the inner wall of the clamping cavity, the positioning rack meshes with the positioning gear, and a tooth groove meshing with the positioning gear is opened on the surface of the clamping rod, when the end of the clamping rod is embedded in the clamping cavity, the positioning rack is driven to slide in the direction away from the positioning cavity, and the end of the positioning rack protrudes from the surface of the clamping block.

By adopting the above technical solution, when the end of the clamping rod is embedded in the clamping cavity, the inner wall of the tooth groove engages with the wheel surface of the positioning gear and drives the positioning gear to rotate, and the positioning rack engages with the positioning gear, driving the positioning rack to slide in the direction away from the positioning cavity, and the end of the positioning rack protrudes from the surface of the clamping block. The staff can judge the clamping condition of the end of the clamping rod in the clamping cavity according to the position of the positioning rack in the positioning cavity.

Optionally, a cooling component is connected to the clamping block, and the cooling component includes a cooling fan, a cooling motor, a thermal expansion and contraction block and a contact switch. The cooling fan is rotatably connected to the surface of the positioning rack facing the workpiece, the cooling motor is connected to the surface of the clamping block, the thermal expansion and contraction block is connected to the motor shaft of the cooling motor facing the cooling fan, the cooling fan rotating shaft is provided with a groove for the thermal expansion and contraction block to be embedded, the contact switch is connected to the inner wall of the groove, the contact switch is electrically connected to the cooling motor, and when the thermal expansion and contraction block heats up and expands and is embedded in the groove, the contact switch abuts the thermal expansion and contraction block and is turned on, and the cooling motor is energized to run and drive the cooling fan to rotate.

By adopting the above technical scheme, when a large amount of heat energy is generated during the processing of the workpiece, the thermal expansion and contraction block heats up and expands and embeds into the groove, the contact switch abuts the thermal expansion and contraction block and is turned on, the cooling motor is energized and drives the cooling fan to rotate, the air outlet of the cooling fan faces the workpiece, the cooling fan drives the air to impact the surface of the workpiece, the air and the workpiece exchange heat, the workpiece is cooled, and the stability of the workpiece processing is ensured.

Optionally, the cooling component further includes a driving plate, and the surface of the abutting block facing the workpiece is provided with a rotating cavity for the driving plate to rotate, and when the driving plate rotates on the inner wall of the rotating cavity, air is driven to impact the surface of the workpiece.

By adopting the above technical solution, the driving plate rotates on the inner wall of the rotating chamber, driving the air to impact the surface of the workpiece, and the air and the workpiece are fully in contact for heat exchange, thereby achieving cooling of the workpiece.

Optionally, the cooling component also includes a worm wheel, a worm, a cam and an elastic member 2, the cam being rotatably connected to the surface of the clamping block, one end of the elastic member 2 in the elastic force direction is connected to the driving plate surface, and the other end of the elastic member 2 in the elastic force direction is connected to the inner wall of the rotating chamber, the elastic member 2 has a tendency to elastically drive the driving plate surface to press against the cam wheel surface, and the cam wheel surface is in rolling contact with the driving plate surface, the worm wheel is coaxially connected to the cam rotating shaft, the worm is coaxially connected to the motor shaft of the cooling motor, and the worm wheel engages with the worm.

By adopting the above technical scheme, when the cooling motor is running, the worm meshes with the worm wheel, driving the worm wheel to rotate around its own axis, and the worm wheel is coaxially fixed on the cam rotating shaft, driving the cam to rotate on the clamping block, and the elastic force of the elastic member drives the driving plate surface to press against the cam wheel surface, and the cam wheel surface and the driving plate surface are in rolling contact, driving the driving plate to rotate on the inner wall of the rotating chamber, driving the air to impact the surface of the workpiece, thereby achieving cooling of the workpiece. There is no need for an external power device to drive the driving plate to rotate, reducing energy loss, thereby embodying the concept of energy saving.

In a second aspect, the present application provides a workpiece processing method, which adopts the following technical solution:

A workpiece processing method, using the above-mentioned rotating fixture for a four-axis machine tool, comprises the following steps:

The four-axis machine tool is installed with a rotating fixture to fix the base to the table top of the four-axis machine tool;

Workpiece installation: Place the workpiece on the chassis, and the limit blocks correspond to the bolt holes one by one and are embedded;

Adjust the workpiece, rotate the chassis, the workpiece processing surface faces the processing end of the four-axis machine tool, and the side wall of the positioning block abuts against the side wall of the clamping cylinder to form a limit;

Workpiece processing: the four-axis machine tool processing end processes the workpiece processing surface.

By adopting the above technical solution, when the four-axis machine tool processing end completes processing of the workpiece processing surface, the chassis is driven to rotate, and the other processing surfaces of the workpiece are driven to face the four-axis machine tool processing end. There is no need to remove the workpiece and adjust the position before clamping it with a fixture, which reduces the waste of molds, reduces the processing steps of the workpiece, shortens the processing cycle of the workpiece, and thus reduces the processing cost of the workpiece.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The setting of the chassis, limit blocks and limit seats drives the other surfaces of the workpiece to face the processing end of the four-axis machine tool. There is no need to remove the workpiece, readjust the position and then clamp it with a fixture, which reduces the processing steps of the workpiece, shortens the processing cycle of the workpiece, and thus reduces the processing cost of the workpiece;

2. The clamping cylinder, clamping connecting rod and clamping block are set up, and the surfaces of the clamping block and the limit block clamp the two sides of the workpiece to form a limit, so that the workpiece is not easy to deviate on the chassis, thereby improving the processing accuracy of the workpiece;

3. The positioning block is set, and the side wall of the positioning block abuts against the side wall of the clamping cylinder to form a limit, so that the chassis is not easy to deflect on the base surface, thereby further improving the processing accuracy of the workpiece.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application.

FIG2 is a partial cross-sectional view of an embodiment of the present application, mainly showing a limit stop assembly.

FIG3 is a partial cross-sectional view of an embodiment of the present application, mainly showing a cooling component.

FIG. 4 is a schematic diagram of a local structure in an embodiment of the present application, mainly showing elastic member 2. FIG.

FIG. 5 is a schematic diagram of the partial structure of the cooling component and the tightening component in the embodiment of the present application.

Description of the accompanying drawings: 1, workpiece; 11, bolt hole; 2, base; 21, tightening groove; 3, chassis; 4, limit assembly; 41, limit seat; 411, sliding cavity; 42, limit block; 5, positioning assembly; 51, positioning block; 6, clamping assembly; 61, clamping cylinder; 62, clamping connecting rod; 63, clamping block; 7, power motor; 8, tightening assembly; 81, elastic member 1; 82, tightening piston; 83, tightening ring capsule; 8 4. Clamping block; 841. Clamping cavity; 842. Positioning cavity; 843. Rotating cavity; 85. Clamping connecting rod; 86. Clamping rod; 861. Tooth groove; 87. Positioning rack; 88. Positioning gear; 9. Cooling component; 91. Cooling fan; 911. Embossed groove; 92. Cooling motor; 93. Thermal expansion and contraction block; 94. Contact switch; 95. Drive plate; 96. Worm gear; 97. Worm; 98. Cam; 99. Elastic member II.

DETAILED DESCRIPTION

The present application is further described in detail below in conjunction with Figures 1-5.

The embodiment of the present application discloses a rotating fixture for a four-axis machine tool. Referring to FIG1 , a workpiece 1 is provided with a plurality of bolt holes 11 for bolts to penetrate in the circumferential direction. A rotating fixture for a four-axis machine tool comprises a base 2, a chassis 3, a limit assembly 4, a positioning assembly 5 and a plurality of clamping assemblies 6. The bottom of the base 2 can be mounted and fixed on the table of the four-axis machine tool. The chassis 3 is rotatably connected to the top surface of the base 2. The rotation axis of the chassis 3 and the height direction of the base 2 are parallel to each other. A power motor 7 is fixed to the bottom of the base 2 by bolts. The end of the motor shaft of the power motor 7 penetrates the bottom of the base 2 and is coaxially fixed to the rotation axis of the chassis 3. The power motor 7 is fixed to the bottom of the base 2 by bolts. The machine 7 can drive the chassis 3 to rotate on the top surface of the base 2, so as to realize the precise rotation of the chassis 3 on the top surface of the base 2; the limit component 4 is installed on the top surface of the chassis 3, and the limit component 4 can limit the workpiece 1 to the top surface of the chassis 3; a plurality of clamping components 6 are fixed at intervals around the axis of the chassis 3, and the clamping component 6 can tightly fix the workpiece 1 on the limit component 4; the positioning component 5 is installed on the top surface of the base 2, and the positioning component 5 can abut against the clamping component 6 and limit the rotation of the chassis 3, so that the four-axis machine tool can accurately process the workpiece 1, thereby improving the processing accuracy of the workpiece 1.

Referring to Figure 2, the limiting assembly 4 includes a plurality of limiting seats 41 and a plurality of limiting blocks 42. The ends of the plurality of limiting seats 41 are fixed on the top surface of the chassis 3 at intervals around the axis of the chassis 3. The limiting blocks 42 correspond to and are fixed to the tops of the limiting seats 41 one by one. The limiting blocks 42 can be embedded in the bolt holes 11 of the workpiece 1. When the workpiece 1 is placed on the surface of the chassis 3, the limiting blocks 42 correspond to and are embedded in the bolt holes 11 of the workpiece 1 one by one. The circumferential outer wall of the limiting block 42 presses against the inner wall of the bolt hole 11 of the workpiece 1 to form a limit, so that the workpiece 1 is not easily offset on the surface of the chassis 3, thereby realizing the limitation of the workpiece 1 on the top surface of the chassis 3.

1 and 2, the clamping assembly 6 includes a clamping cylinder 61, a clamping connecting rod 62 and a clamping block 63. The clamping cylinder 61 is fixed to the top surface of the chassis 3. The axis of the piston rod of the clamping cylinder 61 and the rotation axis of the chassis 3 are parallel to each other. One end of the clamping block 63 is rotatably connected to the end of the piston rod of the clamping cylinder 61, and the other end of the clamping block 63 can be pressed against the surface of the workpiece 1. One end of the clamping connecting rod 62 is rotatably connected to the surface of the clamping cylinder 61, and the other end of the clamping connecting rod 62 is rotatably connected to the surface of the clamping block 63. The clamping connecting rod 62 is located on the side of the clamping cylinder 61 close to the workpiece 1; when the piston rod of the clamping cylinder 61 is extended, the clamping connecting rod 62 guides the clamping block 63 to rotate in the direction close to the workpiece 1, and the end of the clamping block 63 and the surface of the limit block 42 clamp the two sides of the workpiece 1 to form a limit, thereby increasing the pressing force between the workpiece 1 and the limit block 42.

1 , the positioning assembly 5 includes a plurality of positioning blocks 51, which are fixed on the surface of the base 2 at intervals around the axis of the chassis 3. The positioning blocks 51 correspond to the clamping cylinders 61 one by one. The side walls of the positioning blocks 51 can abut against the side walls of the clamping cylinders 61 to form a positioning and limit the rotation of the chassis 3, thereby ensuring the processing accuracy of the four-axis machine tool on the workpiece 1.

2 and 3, a tightening assembly 8 is installed on the base 2, and the tightening assembly 8 can limit the rotation of the chassis 3. The tightening assembly 8 includes an elastic member 81, a tightening piston 82, a tightening ring capsule 83, a tightening block 84, a tightening connecting rod 85, a tightening rod 86, a positioning rack 87 and a positioning gear 88. The material of the tightening ring capsule 83 can be rubber or silicone. In the embodiment of the present application, the material of the tightening ring capsule 83 is rubber, which has a certain deformation ability. The inner ring of the tightening ring capsule 83 is coaxially fixed to the outside of the limiting block 42, and the outer ring of the tightening ring capsule 83 can abut against the inner wall of the bolt hole 11 of the workpiece 1. The material of the tightening piston 82 can be rubber or silicone. In the embodiment of the present application, the material of the tightening piston 82 is rubber, which has a certain deformation ability. The top surface of the limiting seat 41 is provided with a sliding cavity 411 for the sliding movement of the tightening piston 82, and the sliding cavity 411 is connected to the inner cavity of the tightening ring capsule 83. The shifting direction and the rotation axis of the chassis 3 are parallel to each other. The elastic member 81 can be a compression spring or a tension spring. In the embodiment of the present application, the elastic member 81 is a compression spring with a certain deformation ability. One end of the elastic member 81 in the elastic direction is fixed to the bottom wall of the sliding chamber 411, and the other end of the elastic member 81 in the elastic direction is fixed to the surface of the clamping piston 82. The elastic member 81 has the elastic force to drive the clamping piston 82 to slide in the direction away from the sliding chamber 411, and the end of the clamping piston 82 protrudes from the top surface of the limit seat 41. The bottom of the workpiece 1 can abut against the surface of the clamping piston 82 and drive the clamping piston 82 to slide in the direction close to the sliding chamber 411. The air pressure in the sliding chamber 411 increases, and the air in the sliding chamber 411 enters the inner cavity of the clamping ring bag 83. The outer ring of the clamping ring bag 83 is pressurized and expanded and presses against the inner wall of the bolt hole 11 of the workpiece 1 to form a limit, thereby increasing the clamping force between the workpiece 1 and the limit block 42.

2 and 3, the clamping block 84 is welded and fixed on the surface of the base 2, a clamping groove 21 is provided on the surface of the chassis 3 for the sliding movement of the clamping rod 86, the sliding direction of the clamping rod 86 and the rotation axis of the chassis 3 are perpendicular to each other, the clamping rod 86 is located between the limit seat 41 and the clamping block 84, and a clamping cavity 841 is provided on the surface of the clamping block 84 for the end of the clamping rod 86 to be embedded, one end of the clamping connecting rod 85 is rotatably connected to the surface of the clamping piston 82, and the other end of the clamping connecting rod 85 is rotatably connected to the surface of the clamping piston 82. The surface of the clamping rod 86; when the clamping piston 82 slides toward the sliding chamber 411 due to the pressure of the workpiece 1, the clamping connecting rod 85 receives the power of the clamping piston 82 and drives the clamping rod 86 to slide along the inner wall of the clamping groove 21 toward the clamping chamber 841, and the end of the clamping rod 86 is embedded in the clamping chamber 841, and the circumferential outer wall of the clamping rod 86 presses against the inner wall of the clamping chamber 841 to form a limit, so that the chassis 3 is not easily offset on the top surface of the base 2, thereby improving the processing accuracy of the workpiece 1.

2 and 3, a positioning cavity 842 is provided on the top surface of the clamping block 84 for the sliding movement of the positioning rack 87. The sliding direction of the positioning rack 87 and the height direction of the clamping block 84 are parallel to each other. The positioning cavity 842 is connected to the clamping cavity 841, and the positioning gear 88 is rotatably connected to the inner wall of the clamping cavity 841. The positioning rack 87 meshes with the positioning gear 88, and the rod surface of the clamping rod 86 is provided with a tooth groove 861 that meshes with the positioning gear 88; when the end of the clamping rod 86 is embedded in the clamping cavity 841, the inner wall of the tooth groove 861 meshes with the wheel surface of the positioning gear 88, driving the positioning gear 88 to rotate on the inner wall of the clamping cavity 841, the positioning rack 87 meshes with the positioning gear 88, driving the positioning rack 87 to slide in the direction away from the positioning cavity 842, and the end of the positioning rack 87 protrudes from the top surface of the clamping block 84, so that the staff can directly judge the embedding condition of the clamping rod 86 in the clamping cavity 841 by the position of the positioning rack 87 in the positioning cavity 842.

3 and 4, a cooling component 9 is installed on the abutting block 84, and the cooling component 9 can dissipate heat for the workpiece 1. The cooling component 9 includes a cooling fan 91, a cooling motor 92, a thermal expansion and contraction block 93, a contact switch 94, a drive plate 95, a worm gear 96, a worm 97, a cam 98 and an elastic member 99. The cooling fan 91 is rotatably connected to the surface of the positioning rack 87 facing the workpiece 1, and the air outlet end of the cooling fan 91 faces the surface of the workpiece 1. The cooling motor 92 is fixed to the top surface of the abutting block 84 by bolts, and the motor axis of the cooling motor 92 coincides with the rotation axis of the cooling fan 91. The material of the thermal expansion and contraction block 93 can be rubber or nylon. In the embodiment of the present application, the thermal expansion and contraction The material of block 93 is nylon, which has a certain thermal expansion coefficient. The end of the thermal expansion and contraction block 93 is fixed to the end of the motor shaft of the cooling motor 92. The end surface of the rotating shaft of the cooling fan 91 is provided with a groove 911 for the thermal expansion and contraction block 93 to be embedded. The contact switch 94 is installed on the inner wall of the groove 911, and the contact switch 94 is electrically connected to the cooling motor 92; when the thermal expansion and contraction block 93 heats up and expands, the end of the thermal expansion and contraction block 93 is embedded in the groove 911, the contact switch 94 abuts against the thermal expansion and contraction block 93 and is turned on, the cooling motor 92 is powered on and drives the cooling fan 91 to rotate, the cooling fan 91 drives the air to impact the surface of the workpiece 1, the workpiece 1 exchanges heat with the air, and the cooling of the workpiece 1 is achieved.

4 and 5, a rotating cavity 843 for rotating the driving plate 95 is provided on the surface of the clamping block 84 facing the workpiece 1, and the driving plate 95 faces the workpiece 1. The cam 98 is rotatably connected to the top surface of the clamping block 84, and the rotation axis of the cam 98 and the height direction of the clamping block 84 are parallel to each other. The elastic member 99 can be a tension spring or a torsion spring. In the embodiment of the present application, the elastic member 99 is a torsion spring with a certain deformation ability. One end of the elastic member 99 in the elastic force direction is fixed on the inner wall of the rotating cavity 843, and one end of the elastic member 99 in the elastic force direction is fixed on the rotating shaft of the driving plate 95. The elastic member 99 has the elastic force to drive the driving plate 95 to rotate in the direction close to the cam 98, and the driving plate 95 surface tends to press against the wheel surface of the cam 98.

3 and 4, the cam 98 has a large end and a small end, and the wheel surface of the cam 98 is in rolling contact with the surface of the driving plate 95. When the large end of the cam 98 abuts against the surface of the driving plate 95, the driving plate 95 is driven to rotate in a direction close to the workpiece 1. When the small end of the cam 98 abuts against the surface of the driving plate 95, the driving plate 95 is rotated in a direction away from the workpiece 1, thereby realizing the back and forth swing of the driving plate 95 in the rotating chamber 843, driving the air to impact the surface of the workpiece 1, and the workpiece 1 exchanges heat with the air to achieve cooling of the workpiece 1.

4 and 5, the worm wheel 96 is coaxially fixed on the rotating shaft of the cam 98, and the worm 97 is coaxially fixed on the motor shaft of the cooling motor 92. The worm 97 engages with the worm wheel 96. When the cooling motor 92 is running, it drives the worm 97 to rotate around its own axis. The worm 97 engages with the worm wheel 96, driving the worm wheel 96 to rotate around its own axis, driving the cam 98 to rotate on the surface of the abutting block 84. No external power device is required to drive the cam 98 to rotate, thereby reducing energy loss, thereby embodying the concept of energy saving.

The implementation principle of a rotating clamp for a four-axis machine tool in the embodiment of the present application is as follows: a workpiece 1 is placed on a chassis 3, a limit block 42 corresponds to and is embedded in the bolt hole 11 of the workpiece 1 one by one, and the circumferential outer wall of the limit block 42 is pressed against the inner wall of the bolt hole 11 of the workpiece 1 to form a limit, the power motor 7 drives the chassis 3 to rotate on the surface of the base 2, and the processing surface of the workpiece 1 faces the processing end of the four-axis machine tool, the piston rod of the clamping cylinder 61 extends, and the clamping connecting rod 62 guides the clamping block 63 to rotate in the direction close to the workpiece 1, and the surface of the clamping block 63 and the surface of the limit block 42 clamp the two sides of the workpiece 1 to form a limit, so that the workpiece 1 is not easily offset on the surface of the chassis 3, thereby improving the processing accuracy of the workpiece 1, and when it is necessary to process other surfaces of the workpiece 1, the power motor 7 drives the chassis 3 to continue to rotate, so that the other processing surfaces of the workpiece 1 face the processing end of the four-axis machine tool, and there is no need to remove the workpiece 1 and readjust the position and then use the clamp to clamp it, thereby reducing the processing steps of the workpiece 1, shortening the processing cycle of the workpiece 1, and reducing the processing cost of the workpiece 1.

The present application also discloses a workpiece processing method, which uses the above-mentioned rotating fixture for a four-axis machine tool, and includes the following steps:

The four-axis machine tool is installed with a rotating fixture to fix the base 2 on the processing table of the four-axis machine tool;

The workpiece 1 is installed by placing the workpiece 1 on the chassis 3, and the limit blocks 42 are corresponding to the bolt holes 11 one by one and embedded;

The workpiece 1 is adjusted, the chassis 3 is rotated, the machining surface of the workpiece 1 faces the machining end of the four-axis machine tool, and the side wall of the positioning block 51 abuts against the side wall of the clamping cylinder 61 to form a limit position;

Workpiece 1 is processed, and the four-axis machine tool processing end processes the processing surface of workpiece 1.

The implementation principle of a workpiece processing method in an embodiment of the present application is as follows: when the four-axis machine tool processing end completes processing of the processing surface of the workpiece 1, the chassis 3 is driven to rotate, and the other processing surfaces of the workpiece 1 are driven to face the four-axis machine tool processing end. There is no need to remove the workpiece 1 and adjust the position before clamping it with a clamp, which reduces the waste of the mold, reduces the processing steps of the workpiece 1, shortens the processing cycle of the workpiece 1, and thus reduces the processing cost of the workpiece 1.

The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims (9)

1. A rotating fixture for a four-axis machine tool, wherein a workpiece (1) has a plurality of bolt holes (11) for bolts to pass through, characterized in that: it comprises a base (2), a chassis (3) and a limit assembly (4), wherein the chassis (3) is rotatably connected to the surface of the base (2), the limit assembly (4) comprises a plurality of limit seats (41) and a plurality of limit blocks (42), wherein the plurality of limit seats (41) are connected to the surface of the chassis (3) at intervals, the limit blocks (42) correspond to and are connected to the limit seats (41) one by one, and the limit blocks (42) correspond to and are embedded in the bolt holes (11) of the workpiece (1); and further comprises a plurality of clamping assemblies (6), wherein the plurality of clamping assemblies (6) are connected to the surface of the chassis (3) at intervals, the clamping assemblies (6) comprise a clamping cylinder (61), a clamping connecting rod (62) and a clamping block (63), and the clamping cylinder ( The clamping block (63) is connected to the surface of the chassis (3), the axis of the piston rod of the clamping cylinder (61) and the rotation axis of the chassis (3) are parallel to each other, one end of the clamping block (63) is rotationally connected to the piston rod of the clamping cylinder (61), and the other end of the clamping block (63) can be pressed against the surface of the workpiece (1) to form a limit, one end of the clamping connecting rod (62) is rotationally connected to the surface of the clamping cylinder (61), and the other end of the clamping connecting rod (62) is rotationally connected to the surface of the clamping block (63), and the clamping connecting rod (62) is located on a side of the clamping block (63) close to the limit seat (41). When the piston rod of the clamping cylinder (61) is extended, the clamping connecting rod (62) guides the clamping block (63) to rotate in a direction close to the workpiece (1), and the surface of the clamping block (63) and the surface of the limit block (42) clamp the two sides of the workpiece (1) to form a limit. 2. A rotating clamp for a four-axis machine tool according to claim 1, characterized in that: the base (2) is connected to a positioning assembly (5), the positioning assembly (5) includes a plurality of positioning blocks (51), the plurality of positioning blocks (51) are connected to the surface of the base (2) at intervals around the axis of the chassis (3), and the side walls of the positioning blocks (51) can abut against the side walls of the clamping cylinder (61) to form a limit. 3. A rotating clamp for a four-axis machine tool according to claim 1, characterized in that: the base (2) is connected to a clamping assembly (8), the clamping assembly (8) includes an elastic member (81), a clamping piston (82) and a clamping ring capsule (83), the inner ring of the clamping ring capsule (83) is connected to the outer periphery of the limit block (42), the surface of the limit seat (41) is provided with a sliding cavity (411) for the clamping piston (82) to slide, and the sliding cavity (411) is connected to the clamping ring capsule (83) inner cavity, one end of the elastic member (81) in the elastic force direction is connected to the bottom wall of the sliding cavity (411), and the other end of the elastic member (81) in the elastic force direction is connected to the surface of the pressing piston (82), the elastic member (81) has the elastic force to drive the pressing piston (82) to slide in the direction away from the limit seat (41), and the end of the pressing piston (82) tends to protrude from the surface of the limit seat (41), and the bottom surface of the workpiece (1) can abut the surface of the pressing piston (82). 4. A rotating clamp for a four-axis machine tool according to claim 3, characterized in that: the clamping assembly (8) also includes a clamping block (84), a clamping connecting rod (85) and a clamping rod (86), the clamping block (84) is connected to the surface of the base (2), the surface of the chassis (3) is provided with a clamping groove (21) for the clamping rod (86) to slide, one end of the clamping connecting rod (85) is rotatably connected to the surface of the clamping piston (82), and the other end of the clamping connecting rod (85) is rotatably connected to the surface of the clamping piston (82). On the rod surface of the clamping rod (86), the clamping block (84) is connected to the surface of the base (2), and the surface of the clamping block (84) is provided with a clamping cavity (841) for the end of the clamping rod (86) to be embedded. When the clamping piston (82) slides in the direction close to the sliding cavity (411), the clamping connecting rod (85) receives the power of the clamping piston (82) and drives the clamping rod (86) to approach the clamping cavity (841), and the end of the clamping rod (86) is embedded in the clamping cavity (841). 5. A rotating fixture for a four-axis machine tool according to claim 4, characterized in that: the clamping assembly (8) further comprises a positioning rack (87) and a positioning gear (88), a positioning cavity (842) for the positioning rack (87) to slide is provided on the surface of the clamping block (84), the sliding direction of the positioning rack (87) and the sliding direction of the clamping rod (86) are perpendicular to each other, the positioning cavity (842) is connected to the clamping cavity (841), and the positioning gear (88) is provided on the surface of the clamping block (84). (88) is rotatably connected to the inner wall of the clamping cavity (841), the positioning rack (87) meshes with the positioning gear (88), and the surface of the clamping rod (86) is provided with a tooth groove (861) meshing with the positioning gear (88). When the end of the clamping rod (86) is embedded in the clamping cavity (841), it drives the positioning rack (87) to slide in the direction away from the positioning cavity (842), and the end of the positioning rack (87) protrudes from the surface of the clamping block (84). 6. A rotating fixture for a four-axis machine tool according to claim 5, characterized in that: a cooling component (9) is connected to the abutting block (84), and the cooling component (9) includes a cooling fan (91), a cooling motor (92), a thermal expansion and contraction block (93) and a contact switch (94); the cooling fan (91) is rotatably connected to the surface of the positioning rack (87) facing the workpiece (1); the cooling motor (92) is connected to the surface of the abutting block (84); the thermal expansion and contraction block (93) is connected to the surface of the cooling motor (92) facing the workpiece (1); On the motor shaft of the cooling fan (91), the rotating shaft of the cooling fan (91) is provided with an embedding groove (911) for embedding the thermal expansion and contraction block (93), the contact switch (94) is connected to the inner wall of the embedding groove (911), and the contact switch (94) is electrically connected to the cooling motor (92). When the thermal expansion and contraction block (93) heats up and expands and embeds into the embedding groove (911), the contact switch (94) abuts against the thermal expansion and contraction block (93) and is turned on, and the cooling motor (92) is powered on and drives the cooling fan (91) to rotate. 7. A rotating fixture for a four-axis machine tool according to claim 6, characterized in that: the cooling component (9) also includes a driving plate (95), and the surface of the clamping block (84) facing the workpiece (1) is provided with a rotating cavity (843) for the driving plate (95) to rotate, and when the driving plate (95) rotates on the inner wall of the rotating cavity (843), it drives air to impact the surface of the workpiece (1). 8. A rotating fixture for a four-axis machine tool according to claim 7, characterized in that: the cooling component (9) also includes a worm wheel (96), a worm (97), a cam (98) and an elastic member 2 (99), the cam (98) is rotatably connected to the surface of the clamping block (84), one end of the elastic member 2 (99) in the elastic force direction is connected to the drive plate (95) plate surface, and the other end of the elastic member 2 (99) in the elastic force direction is connected to the inner wall of the rotating chamber (843), the elastic member 2 (99) has a tendency to elastically drive the drive plate (95) plate surface to press against the cam (98) wheel surface, and the cam (98) wheel surface is in rolling contact with the drive plate (95) plate surface, the worm wheel (96) is coaxially connected to the cam (98) rotating shaft, the worm (97) is coaxially connected to the motor shaft of the cooling motor (92), and the worm wheel (96) engages with the worm (97). 9. A workpiece processing method, characterized in that: using a rotating fixture for a four-axis machine tool according to any one of claims 1 to 8, comprising the following steps: The four-axis machine tool is installed with a rotating fixture to fix the base (2) on the table top of the four-axis machine tool processing table; The workpiece (1) is installed by placing the workpiece (1) on the chassis (3), and the limit blocks (42) are corresponding to the bolt holes (11) one by one and embedded; The workpiece (1) is adjusted, the chassis (3) is rotated, the machining surface of the workpiece (1) faces the machining end of the four-axis machine tool, and the side wall of the positioning block (51) abuts against the side wall of the clamping cylinder (61) to form a limit position; The workpiece (1) is processed by a four-axis machine tool processing end to process the processing surface of the workpiece (1).