Rapid workpiece positioning clamp and numerical control machine tool

Abstract

The invention discloses a rapid workpiece positioning clamp and a numerical control machine tool. The rapid workpiece positioning clamp comprises a fixing base, a mounting base and a clamping assembly. The clamping assembly comprises a first clamping mechanism and a second clamping mechanism. The first clamping mechanism is used for abutting against the inner side surface, in the first direction, of a workpiece. The second clamping mechanism is used for abutting against the outer side surface, in the first direction, of the workpiece and the inner side surface, in the second direction, of the workpiece, the first clamping mechanism is connected with the second clamping mechanism, and the first clamping mechanism is driven so that the first clamping mechanism and the second clamping mechanism can abut against the outer surface of the workpiece at the same time. The first clamping mechanism is driven so that the first clamping mechanism can abut against the inner side surface of the workpiece in the first direction, meanwhile, the second clamping mechanism can be driven to abut against the outer side surface and the inner side surface of the workpiece, the workpiece is positioned on the mounting base while the workpiece is clamped, and therefore the purpose of rapidly clamping the workpiece is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of metal machining, and in particular to a workpiece rapid positioning fixture and a numerically controlled machine tool. Background Art

[0002] Three-axis and four-axis CNC machining machines are generally used to process workpieces with various characteristic structures such as spatial polyhedrons, hollows, thin walls, etc. In traditional three-axis and four-axis machining, for the machining of complex parts, multiple clamping is often required to complete all machining surfaces, which not only increases the machining time, but also reduces the machining accuracy and efficiency. Therefore, a positioning fixture that can quickly clamp the workpiece is urgently needed to meet production needs. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a workpiece rapid positioning fixture, which can quickly clamp special workpieces, shorten the overall processing time, and improve production efficiency.

[0004] The present invention also provides a numerically controlled machine tool having the workpiece rapid positioning fixture.

[0005] According to a first aspect of the present invention, a workpiece rapid positioning fixture comprises: A fixed seat, the fixed seat having a rotation center, and the fixed seat is fixed on the machine tool; A mounting seat, the mounting seat is mounted on the fixing seat, and a mounting surface of the mounting seat has a first direction and a second direction that are perpendicular to each other; and A clamping assembly, the clamping assembly is arranged in the mounting seat, the clamping assembly has two clamping stations, the two clamping stations are arranged opposite to each other along a first direction of the mounting seat, and the clamping assembly is used to clamp and position the workpiece on the clamping stations; Wherein, the clamping assembly comprises: a first clamping mechanism, the first clamping mechanism being arranged at the center of the mounting seat, the center of the first clamping mechanism coinciding with the rotation center of the fixing seat, the first clamping mechanism being used to abut against the inner surface of the workpiece in the first direction; and A second clamping mechanism, the second clamping mechanism is arranged on the mounting seat, the second clamping mechanism is respectively located on two opposite sides of the first clamping mechanism, the second clamping mechanism is used to press against the outer surface of the workpiece in the first direction and the inner surface in the second direction, the first clamping mechanism is connected to the second clamping mechanism, and the first clamping mechanism is driven so that the first clamping mechanism and the second clamping mechanism press against the outer surface of the workpiece at the same time.

[0006] The workpiece rapid positioning fixture according to the embodiment of the present invention has at least the following beneficial effects: the first clamping mechanism is connected to the second clamping mechanism, and by driving the first clamping mechanism so that the first clamping mechanism abuts against the inner surface of the workpiece in the first direction, the second clamping mechanism can also be driven so that the second clamping mechanism abuts against the outer surface of the workpiece in the first direction and the inner surface in the second direction. While the first clamping mechanism and the second clamping mechanism clamp the workpiece at the same time, the workpiece is also accurately positioned on the mounting seat, thereby achieving the purpose of quickly clamping the workpiece, shortening the clamping time, and thereby improving production efficiency.

[0007] According to some embodiments of the present invention, the first clamping mechanism comprises: A first driving member, the first driving member is rotatably disposed on the mounting seat, and a rotation center of the first driving member coincides with a rotation center of the fixing seat; The first clamping block, the first clamping blocks are provided with two pieces, the two first clamping blocks can be slidably arranged on the mounting seat, the two first clamping blocks extend along the second direction, the two first clamping blocks are respectively arranged on both sides of the first direction of the first driving member, the two first clamping blocks are connected by a first elastic member, the outer surface of the first driving member abuts against the inner surface of the first clamping block, and the outer surface of the first clamping block abuts against the inner surface of the workpiece.

[0008] According to some embodiments of the present invention, the first driving member comprises: A first driving part, an upper end of which is located on the mounting seat; and The first rotating part, the lower end of the first driving part is connected to the first rotating part, the first driving part is used to drive the first rotating part, the outer peripheral side of the first rotating part is in a cam shape, and the outer arc surface of the first rotating part abuts against the first clamping block.

[0009] According to some embodiments of the present invention, the first driving member further comprises: a second rotating part, the second rotating part can be movably arranged between the first rotating parts, the second rotating part is provided with two pieces, the two second rotating parts are rotationally symmetrical about the rotation center, the outer peripheral side of the second rotating part is in a cam shape, the two second rotating parts are connected by a second elastic member, and the two second rotating parts can be slidably connected to the first rotating parts; and The second driving part is sleeved on the first driving part, a second driving member is arranged on the outer peripheral side of the lower end of the second driving part, the second driving member is located between the two second rotating parts, the outer peripheral side of the second driving member is in a cam shape, the outer side surface of the second driving member abuts against the inner surface of the second rotating part, the second driving part is used to drive the second driving member, and the second driving member rotates to make the two second rotating parts slide outward relative to the first rotating part.

[0010] According to some embodiments of the present invention, the second clamping mechanism comprises: A third driving member, the third driving member is rotatably disposed below the mounting seat, the third driving member is disposed at the lower end of the first driving member, and the first driving member can drive the third driving member to rotate; A transmission member, wherein two transmission members are provided, the two transmission members are arranged below the mounting seat, one end of the two transmission members is connected to the third driving member, and the two transmission members are respectively located on two opposite sides of the third driving member; and A clamping block group, wherein the clamping block groups are slidably arranged on the mounting seat respectively, and two groups of the clamping block groups are arranged. The two groups of the clamping block groups are respectively connected to the other ends of the two transmission members, and the third driving member is used to drive the transmission member to move so that the transmission member drives the clamping block group to respectively press against the outer surface of the workpiece in the first direction and the inner surface in the second direction.

[0011] According to some embodiments of the present invention, the transmission member comprises: a first connecting rod, one end of which is connected to the third driving member; a second connecting rod, the second connecting rod being slidably disposed at the lower end of the mounting seat, one end of the second connecting rod being connected to the other end of the first connecting rod; and A third connecting rod, wherein two third connecting rods are provided, one end of the two third connecting rods is connected to the other end of the second connecting rod, and the other ends of the two third connecting rods are respectively connected to the clamping block groups; and A fourth connecting rod, wherein the fourth connecting rod is slidably disposed in the mounting seat, the clamping block group comprises two second clamping blocks, the two second clamping blocks are respectively connected to the third connecting rod through the fourth connecting rod, and one end of the fourth connecting rod is connected to the second clamping block.

[0012] According to some embodiments of the present invention, the third connecting rod has a waist-shaped hole, the length direction of the waist-shaped hole extends along the length direction of the third connecting rod, and the fourth connecting rod is slidably disposed in the waist-shaped hole.

[0013] According to some embodiments of the present invention, the two third connecting rods are hinged to the second connecting rod, and the fourth connecting rod is rotatably disposed through the other end of the third connecting rod.

[0014] According to some embodiments of the present invention, the second clamping mechanism also includes two adjusting members, which are arranged on the two transmission members and located between the two third connecting rods, and the adjusting members are used to adjust the angle between the two third connecting rods to adjust the initial distance between the two second clamping blocks.

[0015] According to the CNC machine tool of the second aspect of the present invention, the CNC machine tool comprises the workpiece rapid positioning fixture described in any one of the embodiments of the first aspect.

[0016] According to the CNC machine tool of the embodiment of the present invention, there are at least the following beneficial effects: the CNC machine tool is connected with the second clamping mechanism through the first clamping mechanism, so that the first clamping mechanism can be driven to make the first clamping mechanism abut against the inner surface of the workpiece in the first direction, and the second clamping mechanism can be driven by the first clamping mechanism to make the second clamping mechanism abut against the outer surface of the workpiece in the first direction and the inner surface in the second direction. The operator only needs to drive the first clamping mechanism to drive the first clamping mechanism and the second clamping mechanism at the same time. While the first clamping mechanism and the second clamping mechanism clamp the workpiece at the same time, the workpiece is also accurately positioned on the mounting seat, thereby achieving the purpose of quickly clamping the workpiece, shortening the clamping time, and thus improving production efficiency.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 A schematic diagram of a CNC machine tool according to an embodiment of the second aspect of the present invention; Figure 2 for Figure 1 A schematic diagram of a workpiece rapid positioning fixture according to an embodiment of the first aspect is shown; Figure 3 for Figure 2 An exploded schematic diagram of a partial structure of a workpiece rapid positioning fixture is shown; Figure 4 for Figure 3 An exploded schematic diagram of a first driving member of a first clamping mechanism is shown; Figure 5for Figure 3 A schematic diagram showing the cooperation of the first clamping mechanism and the second clamping mechanism; Figure 6 for Figure 5 A schematic diagram of the first clamping mechanism and the second clamping mechanism from another perspective is shown.

[0019] Reference numerals: CNC machine tool 1; workpiece quick positioning fixture 2; workpiece 4; Fixed seat 10; Mounting seat 20; clamping station 21; Clamping assembly 30; first clamping mechanism 31; first driving member 311; first driving part 3111; first rotating part 3112; second rotating part 3113; second elastic member 3113a; second driving part 3114; second driving member 3114a; first clamping block 312; second clamping mechanism 32; third driving member 321; transmission member 322; first connecting rod 3221; second connecting rod 3222; third connecting rod 3223; waist-shaped hole 3223a; fourth connecting rod 3224; clamping block group 323; second clamping block 3231. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] Reference Figures 1 to 3 According to the workpiece rapid positioning fixture 2 of the first embodiment of the present invention, the workpiece rapid positioning fixture 2 includes: a fixed seat 10, a mounting seat 20 and a clamping assembly 30. The fixed seat 10 has a rotation center, and the fixed seat 10 is fixed to the machine tool; the mounting seat 20 is mounted on the fixed seat 10, and the mounting surface of the mounting seat 20 has a first direction (such as the front-to-back direction shown in the figure) and a second direction (such as the left-to-right direction shown in the figure) that are perpendicular to each other; the clamping assembly 30 is arranged in the mounting seat 20, and the clamping assembly 30 has two clamping stations 21, and the positions of the two clamping stations 21 are relatively arranged along the first direction of the mounting surface of the mounting seat 20, and the two clamping assemblies 30 are respectively used to clamp and position the workpiece 4 on the clamping stations 21.

[0025] The clamping assembly 30 includes: a first clamping mechanism 31 and a second clamping mechanism 32. The first clamping mechanism 31 is arranged at the center of the mounting seat 20, the center of the first clamping mechanism 31 coincides with the rotation center of the fixed seat 10, and the first clamping mechanism 31 is used to press against the inner surface of the workpiece 4 in the first direction; the second clamping mechanism 32 is arranged on the mounting seat 20, and the second clamping mechanism 32 is respectively located on the opposite sides of the first clamping mechanism 31, and the second clamping mechanism 32 is used to press against the outer surface of the workpiece 4 in the first direction and the inner surface in the second direction, the first clamping mechanism 31 is connected to the second clamping mechanism 32, and the first clamping mechanism 31 is driven so that the first clamping mechanism 31 and the second clamping mechanism 32 press against the outer surface of the workpiece 4 at the same time.

[0026] The workpiece quick positioning fixture 2 provided by the present invention mainly includes three parts: a fixed seat 10, a mounting seat 20 and a clamping assembly 30. The fixed seat 10 is fixed on the machine tool and has a rotation center; the mounting seat 20 is mounted on the fixed seat 10, and its mounting surface is provided with a first direction and a second direction perpendicular to each other, and is provided with two clamping stations 21 arranged oppositely along the first direction; the clamping assembly 30 is arranged in the mounting seat 20, and is used to clamp and position the workpiece 4 on the clamping station 21.

[0027] Specifically, the fixed seat 10 is the basic part of the fixture, which is ensured to have an accurate rotation center through precision machining and is firmly mounted on the machine tool. The design of the fixed seat 10 needs to consider compatibility with the machine tool to ensure that the fixture can work stably. The mounting seat 20 is mounted on the fixed seat 10, and its mounting surface is designed with precise first and second directions, which are perpendicular to each other and provide an accurate reference for the positioning of the workpiece 4. Two clamping stations 21 are provided on the mounting seat 20, which are arranged relative to each other along the first direction for placing and positioning the workpiece 4. The clamping assembly 30 is the core part of the fixture, including a first clamping mechanism 31 and a second clamping mechanism 32. The first clamping mechanism 31: is arranged at the center position of the mounting seat 20, and its center coincides with the rotation center of the fixed seat 10. The first clamping mechanism 31 is designed to abut the inner surface of the workpiece 4 in the first direction, and through precise adjustment, ensure that the workpiece 4 maintains an accurate position during the clamping process. The second clamping mechanism 32 is arranged on the mounting seat 20, respectively on both sides of the first clamping mechanism 31. The second clamping mechanism 32 is used not only to press against the outer surface of the workpiece 4 in the first direction, but also to press against the inner surface of the workpiece 4 in the second direction. The first clamping mechanism 31 is connected to the second clamping mechanism 32. When the first clamping mechanism 31 is driven, the second clamping mechanism 32 can be driven to move at the same time, so that the workpiece 4 can be clamped in multiple directions at the same time.

[0028] When in use, the workpiece 4 is first placed on the clamping station 21 of the mounting seat 20, and the position of the workpiece 4 is adjusted to match the contact surface of the first clamping mechanism 31 and the second clamping mechanism 32. Then, the driving mechanism of the clamping assembly 30 is started to drive the first clamping mechanism 31 to move toward the inside of the workpiece 4, and at the same time drive the second clamping mechanism 32 to move toward the outside and the other inside of the workpiece 4 until the workpiece 4 is completely clamped. Since the first clamping mechanism 31 coincides with the rotation center of the fixed seat 10, the fixture can maintain the stability of the position of the workpiece 4 during the rotation process, thereby improving the processing accuracy and efficiency.

[0029] It is understandable that the workpiece rapid positioning fixture 2 of the present invention has the following significant advantages: through the precise design of the clamping station 21 and the clamping assembly 30, the workpiece 4 can be quickly positioned and clamped, greatly shortening the processing preparation time. The fixture design takes into account the rotation center of the machine tool and the positioning accuracy of the workpiece 4, ensuring high precision during the processing. The clamping station 21 and the clamping assembly 30 of the fixture can be adjusted according to the shape and size of different workpieces 4, improving the versatility and flexibility of the fixture.

[0030] It can also be understood that the workpiece rapid positioning fixture 2 according to the embodiment of the present invention has at least the following beneficial effects: the first clamping mechanism 31 is connected to the second clamping mechanism 32, and by driving the first clamping mechanism 31 so that the first clamping mechanism 31 presses against the inner surface of the workpiece 4 in the first direction, the second clamping mechanism 32 can also be driven so that the second clamping mechanism 32 presses against the outer surface of the workpiece 4 in the first direction and the inner surface in the second direction. While the first clamping mechanism 31 and the second clamping mechanism 32 clamp the workpiece 4 at the same time, the workpiece 4 is also accurately positioned on the mounting seat 20, thereby achieving the purpose of quickly clamping the workpiece 4, shortening the clamping time, and thereby improving production efficiency.

[0031] Reference Figures 2 to 4 In some embodiments of the present invention, the first clamping mechanism 31 includes: a first driving member 311 and a first clamping block 312. The first driving member 311 can be rotatably arranged on the mounting seat 20, and the rotation center of the first driving member 311 coincides with the rotation center of the fixed seat 10; the first clamping block 312 is provided with two pieces, and the two first clamping blocks 312 can be slidably arranged on the mounting seat 20, and the two first clamping blocks 312 extend along the second direction. The two first clamping blocks 312 are respectively arranged on both sides of the first driving member 311 in the first direction, and the two first clamping blocks 312 are connected by a first elastic member, and the outer surface of the first driving member 311 abuts against the inner surface of the first clamping block 312, and the outer surface of the first clamping block 312 abuts against the inner surface of the workpiece 4.

[0032] According to the workpiece rapid positioning fixture 2 of the above embodiment, the embodiment of the present invention further provides a specific structure of the first clamping mechanism 31, which includes a first driving member 311 and a first clamping block 312, which is described in detail below.

[0033] The first driving member 311 is a core component that drives the first clamping block 312 to move. It can be rotatably set on the mounting seat 20, and its rotation center coincides with the rotation center of the fixed seat 10. Such a design ensures that the first driving member 311 can maintain overall coordination with the fixture and the machine tool when driving the first clamping block 312 to move, avoiding the generation of additional torque or offset, thereby ensuring the accuracy and stability of the positioning of the workpiece 4. The first driving member 311 can take a variety of forms, such as a motor-driven rotating wheel, a hydraulic or pneumatic driven rotating cylinder, etc. The specific selection depends on the actual application scenario and the requirements for the fixture performance. The first clamping block 312 is a component that directly contacts the workpiece 4 and applies a clamping force. In the present invention, two first clamping blocks 312 are provided, which can be slidably set on the mounting seat 20 and extend along the second direction. The two first clamping blocks 312 are respectively arranged on both sides of the first driving member 311 in the first direction. Such a layout enables the first driving member 311 to evenly push the two first clamping blocks 312 to move inwardly of the workpiece 4 when rotating, thereby clamping the workpiece 4.

[0034] In order to improve the flexibility and adaptability of clamping, the two first clamping blocks 312 are connected by a first elastic member (not shown in the figure, such as a spring). In this way, when the first driving member 311 rotates and pushes the first clamping block 312 to clamp the workpiece 4, once the driving force disappears or decreases, the first elastic member will use its elastic recovery force to pull the first clamping block 312 back to the initial position to prepare for the next clamping operation. The outer side of the first clamping block 312 is designed with a contact surface that matches the inner surface of the workpiece 4 to ensure that the clamping force can be evenly transmitted during the clamping process to prevent the workpiece 4 from being deformed or displaced due to uneven force.

[0035] When the workpiece 4 needs to be clamped, the first driving member 311 is started to rotate. Since the rotation center of the first driving member 311 coincides with the rotation center of the fixed seat 10, its rotation can be smoothly transmitted to the first clamping block 312. The outer surface of the first driving member 311 abuts against the inner surface of the first clamping block 312, pushing the first clamping block 312 to slide along the mounting seat 20 and move toward the inner side of the workpiece 4. At the same time, since the two first clamping blocks 312 are connected by the first elastic member, the first elastic member is compressed and stores elastic potential energy. When the processing is completed or the workpiece 4 needs to be released, the first driving member 311 stops rotating or reverses. Due to the reset effect of the first elastic member, the two first clamping blocks 312 will automatically move in the opposite direction, releasing the clamping force on the workpiece 4, so that the workpiece 4 can be easily taken out. Through the cooperation of the two first clamping blocks 312 and the first elastic member, the uniform clamping of the inner surface of the workpiece 4 is achieved, avoiding deformation or displacement caused by uneven force. The rotation center of the first driving member 311 coincides with the rotation center of the fixing seat 10, ensuring stability and reliability during the clamping process. The design of the first clamping block 312 and the first elastic member enables the clamp to adapt to workpieces 4 of different shapes and sizes, improving the versatility and flexibility of the clamp.

[0036] Further, refer to Figures 3 to 6 In some embodiments of the present invention, the first driving member 311 includes: a first driving portion 3111 and a first rotating portion 3112. The upper end of the first driving portion 3111 is located on the mounting seat 20; the lower end of the first driving portion 3111 is connected to the first rotating portion 3112, and the first driving portion 3111 is used to drive the first rotating portion 3112. The outer peripheral side of the first rotating portion 3112 is in a cam shape, and the outer arc surface of the first rotating portion 3112 abuts against the first clamping block 312.

[0037] Specifically, the first driving member 311, as a key component for driving the first clamping block 312 to move, is composed of a first driving portion 3111 and a first rotating portion 3112. The upper end of the first driving portion 3111 is fixed on the mounting seat 20, and its stable combination with the mounting seat 20 is ensured by an appropriate connection method. The lower end of the first driving portion 3111 is connected to the first rotating portion 3112, which is responsible for driving the first rotating portion 3112 to rotate. The first driving portion 3111 is the part that provides the driving force, and it can adopt a variety of driving methods according to actual needs, such as motor drive, hydraulic drive or pneumatic drive. In the present invention, the specific form of the first driving portion 3111 is not strictly limited, as long as it can stably and reliably drive the first rotating portion 3112 to rotate. The first rotating portion 3112 is the part of the first driving member 3111 that directly acts on the first clamping block 312, and its outer peripheral side is designed to be cam-shaped. This design enables the outer arc surface of the first rotating portion 3112 to evenly abut against the inner surface of the first clamping block 312 when the first rotating portion 3112 rotates, thereby pushing the first clamping block 312 to slide along the mounting seat 20 to clamp the workpiece 4. The cam-shaped design not only ensures that the contact area between the first rotating portion 3112 and the first clamping block 312 is large and even, but also enables continuous and stable clamping force to be generated during the driving process, thereby avoiding damage to the workpiece 4 or damage to the fixture itself due to too few contact points or uneven clamping force.

[0038] When the workpiece 4 needs to be clamped, the first driving part 3111 is activated and provides driving force to drive the first rotating part 3112 to start rotating. Since the outer peripheral side of the first rotating part 3112 is in the shape of a cam, as it rotates, the outer arc surface gradually abuts against the inner surface of the first clamping block 312, pushing the first clamping block 312 to slide toward the inside of the workpiece 4. At the same time, since the two first clamping blocks 312 are connected by the first elastic member, when the first driving part 311 rotates and pushes the first clamping block 312 to clamp the workpiece 4, once the driving force disappears or decreases, the first elastic member will use its elastic restoring force to pull the first clamping block 312 back to the initial position to prepare for the next clamping operation. When the processing is completed or the workpiece 4 needs to be released, the first driving part 3111 stops providing driving force or reverse driving, and the first rotating part 3112 stops rotating or reverses rotating. At this time, due to the resetting effect of the first elastic member, the two first clamping blocks 312 will automatically move in opposite directions, releasing the clamping force on the workpiece 4, so that the workpiece 4 can be easily taken out.

[0039] It should be noted that the outer peripheral side of the first rotating part 3112 is designed to be in the shape of a cam, and this shape is not randomly selected, but is based on profound mechanical principles and practical application requirements. The characteristic of the cam shape is that its surface contour line can change according to a predetermined rule, thereby generating a continuous and stable driving force during the rotation process. This design enables the first rotating part 3112 to evenly press against the first clamping block 312 when rotating, ensuring uniform distribution of the clamping force and preventing the workpiece 4 from being deformed or damaged due to uneven force.

[0040] It is understandable that the Archimedean spiral is a special curve, and its polar coordinate equation is r = a + bθ, where r is the polar diameter, θ is the polar angle, and a and b are constants. An important characteristic of the Archimedean spiral is that when a force is applied along the spiral direction, the spiral can produce a self-locking effect, that is, in the absence of external force, the object can remain in the current position and will not slide or fall off by itself. Therefore, combining the cam shape with the self-locking principle of the Archimedean spiral is a major innovation of the present invention. During the rotation of the cam shape of the first rotating part 3112, the contact point between its outer arc surface and the first clamping block 312 will move along a path similar to the Archimedean spiral. This design allows the first clamping block 312 to be stably maintained in the clamping position due to the self-locking characteristics of the cam shape when clamping the workpiece 4, even if there is no additional locking mechanism outside, and will not easily loosen due to vibration or external force.

[0041] Specifically, when the first rotating part 3112 rotates to a certain position, the contact force formed between the outer arc surface of the cam shape and the first clamping block 312 will generate a component along the spiral direction. This component is balanced with other forces on the first clamping block 312 (such as the reaction force of the workpiece 4, the reset force of the first elastic member, etc.), thereby achieving a self-locking effect. This self-locking mechanism not only improves the stability and reliability of the clamp, but also reduces the use of external locking mechanisms, simplifies the structure of the clamp, and reduces manufacturing costs.

[0042] Furthermore, refer to Figures 3 to 6In some embodiments of the present invention, the first driving member 311 further includes: a second rotating portion 3113 and a second driving portion 3114. The second rotating portion 3113 can be movably arranged between the first rotating portion 3112, and the second rotating portion 3113 is provided with two pieces, and the two second rotating portions 3113 are rotationally symmetrical about the rotation center, and the outer peripheral side of the second rotating portion 3113 is in a cam shape, and the two second rotating portions 3113 are connected by a second elastic member 3113a, and the two second rotating portions 3113 can be slidably connected to the first rotating portion 3112; the second driving portion 3114 is sleeved on the first driving portion 3111, and the second driving portion 3114 is sleeved on the first driving portion 3111, and the second driving portion 3114 is sleeved on the first driving portion 3111. A second driving member 3114a is provided on the outer peripheral side of the lower end of the part 3114, and the second driving member 3114a is located between the two second rotating parts 3113. The outer peripheral side of the second driving member 3114a is in a cam shape, and the outer side surface of the second driving member 3114a abuts against the inner surface of the second rotating part 3113. The second driving part 3114 is used to drive the second driving member 3114a, and the second driving member 3114a rotates to make the two second rotating parts 3113 slide outward relative to the first rotating part 3112.

[0043] According to the workpiece rapid positioning fixture 2 of the above embodiment, the present invention designs and optimizes the first driving member 311 in more detail, especially introduces the second rotating part 3113 and the second driving part 3114, and the following is an explanation of its detailed structure and working principle.

[0044] In addition to the first driving part 3111 and the first rotating part 3112, the first driving member 311 also includes two second rotating parts 3113. The two second rotating parts 3113 can be movably arranged between the first rotating part 3112, and are rotationally symmetrically distributed with the rotation center as the symmetry point. The outer peripheral side of the second rotating part 3113 is also designed to be cam-shaped. This design is not only beautiful, but more importantly, it can ensure smooth contact and pushing with adjacent parts during the rotation process. The two second rotating parts 3113 are connected by a second elastic member 3113a (such as a spring). This design enables the second rotating part 3113 to have a certain buffering and reset ability when subjected to external force. At the same time, the second rotating part 3113 can also be slidably connected to the first rotating part 3112. This sliding connection method ensures that the second rotating part 3113 can slide independently and smoothly relative to the first rotating part 3112 when driven. The second driving part 3114 is a key component for driving the second rotating part 3113 to move, and is sleeved on the first driving part 3111. A second driving member 3114a is provided on the outer peripheral side of the lower end of the second driving part 3114, and the driving member is located between the two second rotating parts 3113, and its outer peripheral side is also in a cam shape. This design enables the outer side surface of the second driving member 3114a to evenly abut the inner surface of the second rotating part 3113 when rotating, thereby pushing the second rotating part 3113 to slide. The second driving part 3114 provides a driving force through an appropriate driving method (such as a motor, hydraulic pressure or air pressure, etc.) to drive the second driving member 3114a to rotate. As the second driving member 3114a rotates, the two second rotating parts 3113 will be subjected to a uniform thrust and slide outward relative to the first rotating part 3112. This sliding motion not only increases the clamping range of the clamp, but also enables the clamp to more flexibly adapt to workpieces 4 of different shapes and sizes.

[0045] When it is necessary to clamp the workpiece 4, the first driving part 3111 is first started to drive the first rotating part 3112 to rotate, and the outer peripheral side of the cam shape thereof abuts against the first clamping block 312 to achieve preliminary clamping. Then, the second driving part 3114 is started to drive the second driving member 3114a to rotate. As the second driving member 3114a rotates, the outer side surface of the cam shape thereof will evenly abut against the inner surface of the two second rotating parts 3113, pushing the second rotating part 3113 to slide outward relative to the first rotating part 3112. This sliding motion further pushes the first clamping block 312 to move toward the inner side of the workpiece 4, achieving a tighter and more uniform clamping. When the processing is completed or the workpiece 4 needs to be released, the driving of the second driving part 3114 is first stopped, so that the second rotating part 3113 returns to the initial position under the resetting action of the second elastic member 3113a. Then, the driving of the first driving part 3111 is stopped to stop the rotation of the first rotating part 3112 , and the first clamping block 312 releases the clamping force on the workpiece 4 under the resetting action of the first elastic member, so that the workpiece 4 can be easily taken out.

[0046] Reference Figures 3 to 6 In some embodiments of the present invention, the second clamping mechanism 32 includes: a third driving member 321, a transmission member 322, and a clamping block group 323. The third driving member 321 is rotatably arranged below the mounting seat 20, and the third driving member 321 is arranged at the lower end of the first driving member 311, and the first driving member 311 can drive the third driving member 321 to rotate; there are two transmission members 322, and the two transmission members 322 are arranged below the mounting seat 20, one end of the two transmission members 322 is connected to the third driving member 321, and the two transmission members 322 are respectively located on opposite sides of the third driving member 321; the clamping block group 323 is respectively slidably arranged on the mounting seat 20, and there are two groups of clamping block groups 323, and the two groups of clamping block groups 323 are respectively connected to the other ends of the two transmission members 322, and the third driving member 321 is used to drive the transmission member 322 to move, so that the transmission member 322 drives the clamping block group 323 to respectively press against the outer surface of the workpiece 4 in the first direction and the inner surface in the second direction.

[0047] The core component of the second clamping mechanism 32 is the third driving member 321, which is designed to be rotatably arranged below the mounting seat 20 and located at the lower end of the first driving member 311. This arrangement enables the first driving member 311 to drive the third driving member 321 to rotate while driving the first rotating part 3112. The third driving member 321 can be driven by a motor, a hydraulic motor or a pneumatic motor, and the specific selection depends on the actual application scenario and requirements. The transmission member 322 is a key component connecting the third driving member 321 and the clamping block group 323. Two transmission members 322 are provided in the present invention, and they are respectively located on opposite sides of the third driving member 321. One end of the transmission member 322 is connected to the third driving member 321, and the transmission member 322 can be driven to move through the rotational movement of the third driving member 321. The specific form of the transmission member 322 can be a connecting rod, a gear rack mechanism, a chain sprocket mechanism, etc., as long as the transmission of force and the conversion of displacement can be achieved. The clamping block group 323 is a component that directly acts on the surface of the workpiece 4. In the present invention, two groups of clamping block groups 323 are provided, which are slidably arranged on the mounting seat 20. The two groups of clamping block groups 323 are respectively connected to the other ends of the two transmission members 322. When the transmission member 322 is driven to move by the third driving member 321, the clamping block group 323 will also move accordingly. The inner surface of the clamping block group 323 is designed with a clamping surface that matches the shape of the workpiece 4 to ensure that it can closely fit the surface of the workpiece 4 during the clamping process and provide a stable clamping force.

[0048] When the workpiece 4 needs to be clamped, the first driving member 311 is first started to drive the first rotating part 3112 to rotate, and the outer peripheral side of the cam shape thereof abuts against the first clamping block 312, thereby realizing the preliminary clamping of the workpiece 4 in the first direction (such as the inner side). At the same time, the rotational movement of the first driving member 311 will also drive the third driving member 321 to rotate. Then, the rotational movement of the third driving member 321 will drive the two transmission members 322 to move. Since one end of the transmission member 322 is connected to the third driving member 321 and the other end is connected to the clamping block group 323, the movement of the transmission member 322 will drive the clamping block group 323 to slide on the mounting seat 20. One group of clamping block groups 323 will move toward the first direction (such as the outer side) of the workpiece 4, and the other group of clamping block groups 323 will move toward the second direction (such as the inner side, but different from the surface acted by the first clamping block 312) of the workpiece 4, thereby realizing the simultaneous clamping of the workpiece 4 in two directions. When the processing is completed or the workpiece 4 needs to be released, it is only necessary to stop driving the first driving member 311, so that the first rotating part 3112 and the third driving member 321 stop rotating. At this time, due to the connection between the transmission member 322 and the clamping block group 323 and the sliding design on the mounting seat 20, the clamping block group 323 will automatically return to the initial position under the action of gravity or an appropriate reset mechanism, releasing the clamping force on the workpiece 4, and the workpiece 4 can be easily taken out.

[0049] Further, see Figure 3 as well as Figures 5 and 6 In some embodiments of the present invention, the transmission member 322 includes a first connecting rod 3221, a second connecting rod 3222, a third connecting rod 3223 and a fourth connecting rod 3224. One end of the first connecting rod 3221 is connected to the third driving member 321; the second connecting rod 3222 is slidably disposed at the lower end of the mounting seat 20, and one end of the second connecting rod 3222 is connected to the other end of the first connecting rod 3221; two third connecting rods 3223 are provided, one end of the two third connecting rods 3223 is connected to the other end of the second connecting rod 3222, and the other ends of the two third connecting rods 3223 are respectively connected to the clamping block group 323; the fourth connecting rod 3224 is slidably disposed in the mounting seat 20, and the clamping block group 323 includes two second clamping blocks 3231, and the two second clamping blocks 3231 are respectively connected to the third connecting rod 3223 through the fourth connecting rod 3224, and one end of the fourth connecting rod 3224 is connected to the second clamping block 3231.

[0050] The first connecting rod 3221 is the starting component in the transmission member 322, and one end of the first connecting rod 3221 is directly connected to the third driving member 321. When the third driving member 321 is driven to rotate, the first connecting rod 3221 will rotate or swing accordingly, thereby transmitting the driving force to the subsequent components. The material and size of the first connecting rod 3221 need to be selected according to actual needs to ensure that it can withstand sufficient driving force and torque. The second connecting rod 3222 can be slidably arranged at the lower end of the mounting seat 20, and this sliding design enables the second connecting rod 3222 to move along a predetermined trajectory when subjected to a driving force. One end of the second connecting rod 3222 is connected to the other end of the first connecting rod 3221, and the second connecting rod 3222 is driven to slide by the rotation or swing of the first connecting rod 3221. The sliding direction and distance of the second connecting rod 3222 depend on the rotation angle of the first connecting rod 3221 and the driving mode of the third driving member 321. Two third connecting rods 3223 are provided, and they are respectively connected to the other end of the second connecting rod 3222. One end of the two third connecting rods 3223 is connected to the second connecting rod 3222 to form a bifurcated structure. This design enables the driving force to be transmitted to the two clamping block groups 323 at the same time. The other end of the third connecting rod 3223 is respectively connected to the clamping block group 323. Through the transmission of the third connecting rod 3223, the clamping block group 323 is subjected to the driving force and moves to achieve the clamping or release of the workpiece 4. The fourth connecting rod 3224 is a key component connecting the third connecting rod 3223 and the second clamping block 3231. It is slidably arranged in the mounting seat 20. This sliding design enables the fourth connecting rod 3224 to move stably when subjected to the driving force. The clamping block group 323 includes two second clamping blocks 3231, which are respectively connected to the third connecting rod 3223 through the fourth connecting rod 3224. One end of the fourth connecting rod 3224 is connected to the second clamping block 3231, and the other end is connected to the third connecting rod 3223. Through the transmission of the fourth connecting rod 3224 , the driving force of the third connecting rod 3223 is converted into the moving force of the second clamping block 3231 , thereby achieving the clamping or release of the workpiece 4 .

[0051] When the third driving member 321 is driven to rotate, the first connecting rod 3221 will rotate or swing accordingly. The rotation or swinging of the first connecting rod 3221 will drive the second connecting rod 3222 to slide at the lower end of the mounting seat 20. The sliding of the second connecting rod 3222 will drive the two third connecting rods 3223 to move. Since the third connecting rod 3223 is connected to the clamping block group 323, the clamping block group 323 will also be driven and move. At the same time, the fourth connecting rod 3224 slides in the mounting seat 20, and transmits the driving force of the third connecting rod 3223 to the second clamping block 3231, so that the second clamping block 3231 moves and presses against the workpiece 4. Through the above connection relationship and working principle, the present invention realizes the stable driving and precise control of the clamping block group 323 by the transmission member 322. When it is necessary to clamp the workpiece 4, it is only necessary to start the third driving member 321 to drive the clamping block group 323 to move and clamp the workpiece 4 through the transmission member 322; when it is necessary to release the workpiece 4, it is only necessary to stop the third driving member 321 so that the clamping block group 323 can return to the initial position under the action of the reset mechanism and release the workpiece 4.

[0052] Reference Figure 5 as well as Figure 6 In some embodiments of the present invention, the third connecting rod 3223 has a waist-shaped hole 3223a, the length direction of the waist-shaped hole 3223a extends along the length direction of the third connecting rod 3223, and the fourth connecting rod 3224 is slidably disposed in the waist-shaped hole 3223a.

[0053] The third connecting rod 3223 is an important component of the transmission member 322, and its structural design is directly related to the transmission efficiency and stability of the clamp. In the present invention, the third connecting rod 3223 is specially designed to have a waist-shaped hole 3223a. The waist-shaped hole 3223a is a long strip of hole, and its length direction extends along the length direction of the third connecting rod 3223. This design not only reduces the weight of the third connecting rod 3223 and reduces the manufacturing cost, but also provides enough space for the sliding of the fourth connecting rod 3224. The fourth connecting rod 3224 is a key component connecting the third connecting rod 3223 and the second clamping block 3231. The stability and accuracy of its sliding setting directly affect the clamping effect of the clamp. In the present invention, the fourth connecting rod 3224 is cleverly slidably set in the waist-shaped hole 3223a of the third connecting rod 3223. This arrangement enables the fourth connecting rod 3224 to stably slide along the length direction of the waist-shaped hole 3223a when receiving a driving force, thereby accurately transmitting the driving force to the second clamping block 3231. When the third driving member 321 is driven to rotate, the first connecting rod 3221 will rotate or swing accordingly, thereby driving the second connecting rod 3222 to slide. The sliding of the second connecting rod 3222 will drive the two third connecting rods 3223 to move. Since the third connecting rod 3223 is provided with a waist-shaped hole 3223a, and the fourth connecting rod 3224 is slidably arranged in the waist-shaped hole 3223a, when the third connecting rod 3223 moves, the fourth connecting rod 3224 will slide along the waist-shaped hole 3223a. This sliding design not only ensures the connection stability between the fourth connecting rod 3224 and the third connecting rod 3223, but also enables the fourth connecting rod 3224 to accurately transmit the driving force to the second clamping block 3231, thereby achieving accurate clamping or release of the workpiece 4.

[0054] Referring to some embodiments of the present invention, two third connecting rods 3223 are hinged to the second connecting rod 3222 , and the fourth connecting rod 3224 is rotatably disposed through the other end of the third connecting rod 3223 .

[0055] In the present invention, a hinged connection is adopted between the two third connecting rods 3223 and the second connecting rod 3222. Hinge is a connection method that allows two components to rotate relative to each other within a certain range, which can not only transmit driving force, but also adapt to certain angle changes. Specifically, hinge holes are respectively provided at both ends of the second connecting rod 3222, and a hinge shaft matching the hinge hole is provided at one end of the two third connecting rods 3223. Through the cooperation of the hinge shaft and the hinge hole, the two third connecting rods 3223 can be flexibly connected to the second connecting rod 3222 and rotate relative to each other under the action of the driving force. The fourth connecting rod 3224, as a key component connecting the third connecting rod 3223 and the second clamping block 3231, is designed in the present invention to be rotatably penetrated at the other end of the third connecting rod 3223. Specifically, a through hole is provided at the other end of the third connecting rod 3223, and the diameter of the through hole is slightly larger than the diameter of the fourth connecting rod 3224, so that the fourth connecting rod 3224 can smoothly pass through the through hole. At the same time, a rotating part such as a bearing or a bushing is provided between the through hole and the fourth connecting rod 3224 to ensure that the fourth connecting rod 3224 can maintain a stable rotation state when passing through the through hole. This design not only ensures the connection stability between the fourth connecting rod 3224 and the third connecting rod 3223, but also makes the fourth connecting rod 3224 more flexible and efficient in transmitting driving force.

[0056] When the third driving member 321 is driven to rotate, the first connecting rod 3221 will rotate or swing accordingly, thereby driving the second connecting rod 3222 to slide. Since the second connecting rod 3222 and the two third connecting rods 3223 are connected in an articulated manner, when the second connecting rod 3222 slides, the two third connecting rods 3223 will rotate relative to each other around the hinge point. At the same time, since the fourth connecting rod 3224 can be rotatably arranged at the other end of the third connecting rod 3223, when the third connecting rod 3223 rotates, the fourth connecting rod 3224 will rotate accordingly and transmit the driving force to the second clamping block 3231. In this way, through the articulation and rotation connection between the third connecting rod 3223, the second connecting rod 3222 and the fourth connecting rod 3224, the clamp can realize fast and accurate clamping or release of the workpiece 4.

[0057] In some embodiments of the present invention, the second clamping mechanism 32 also includes two adjusting members (not shown in the figure), which are arranged on the two transmission members 322 and located between the two third connecting rods 3223, and the adjusting members are used to adjust the angle between the two third connecting rods 3223 to adjust the initial distance between the two second clamping blocks 3231.

[0058] The adjusting member is an important component newly added in the present invention, which is mainly used to adjust the angle between the two third connecting rods 3223. Specifically, the two adjusting members are respectively arranged on the two transmission members 322 and are located between the two third connecting rods 3223. The adjusting member can be designed in various forms, such as bolts, nuts, adjusting screws, adjusting blocks, etc., as long as the function of angle adjustment can be achieved. In a preferred embodiment of the present invention, the adjusting member is in the form of an adjusting screw, one end of which is fixedly connected to the transmission member 322, and the other end is connected to the third connecting rod 3223. By rotating the adjusting screw, the relative position between the adjusting screw and the third connecting rod 3223 can be changed, thereby adjusting the angle between the two third connecting rods 3223.

[0059] When the initial distance between the two second clamping blocks 3231 needs to be adjusted, it can be achieved by operating the adjusting member. Specifically, first loosen the fixed connection between the adjusting member and the transmission member 322 or the third connecting rod 3223 (such as loosening the nut), and then rotate the adjusting member (such as rotating the adjusting screw) to move it along the set direction. Since the adjusting member is located between the two third connecting rods 3223, its movement will cause the angle between the two third connecting rods 3223 to change. By accurately controlling the moving distance and direction of the adjusting member, the angle between the two third connecting rods 3223 can be accurately adjusted, thereby adjusting the initial distance between the two second clamping blocks 3231.

[0060] In order to better illustrate the adjusting member of the present invention and its adjusting function, a specific embodiment is given below. In this embodiment, the adjusting member is in the form of an adjusting screw, one end of which is fixedly connected to the transmission member 322 through a threaded connection, and the other end is connected to the third connecting rod 3223 through a bearing or a bushing. When it is necessary to adjust the initial distance between the two second clamping blocks 3231, it is only necessary to rotate the adjusting screw to change the relative position between it and the third connecting rod 3223, thereby achieving the adjustment of the angle. By accurately controlling the number of rotations and direction of the adjusting screw, the initial distance between the two second clamping blocks 3231 can be accurately adjusted.

[0061] After the introduction of the adjusting member, the workpiece quick positioning fixture 2 of the present invention has the following significant effects: by operating the adjusting member, the angle between the two third connecting rods 3223 can be easily adjusted, thereby realizing the flexible adjustment of the initial distance between the two second clamping blocks 3231, meeting the clamping requirements of different workpieces 4. The precise adjustment function of the adjusting member enables the initial distance between the two second clamping blocks 3231 to be more accurately controlled, thereby improving the clamping accuracy and processing efficiency of the fixture. The design of the adjusting member enables the fixture to adapt to workpieces 4 of different shapes, sizes and processing requirements, thereby enhancing the versatility and adaptability of the fixture. The operation of the adjusting member is simple and convenient, does not require complex tools or skills, and reduces the difficulty of operation and the cost of use.

[0062] Reference Figure 1 According to the numerically controlled machine tool 1 of the second embodiment of the present invention, the numerically controlled machine tool 1 includes the workpiece rapid positioning fixture 2 of any one of the embodiments of the first aspect. The present invention also provides a numerically controlled machine tool 1, the important feature of which is that it is equipped with the workpiece rapid positioning fixture 2 described in any one of the first aspects. The following is a detailed description of the specific implementation of the numerically controlled machine tool 1.

[0063] The CNC machine tool 1 of the present invention is mainly composed of a machine tool body, a control system, a drive system, and a workpiece rapid positioning fixture 2. The machine tool body is the basic structure of the CNC machine tool 1, carrying all other components and providing a stable processing environment. The control system is responsible for receiving operating instructions and controlling the coordinated operation of various parts of the machine tool. The drive system provides power for the machine tool, drives the tool and the workpiece 4 to move relative to each other, and completes the processing task. The workpiece rapid positioning fixture 2 is one of the key components of the CNC machine tool 1 of the present invention. It is responsible for quickly and accurately positioning and clamping the workpiece 4 to ensure accuracy and efficiency during the processing.

[0064] In the CNC machine tool 1 of the present invention, the workpiece rapid positioning fixture 2 is integrated on the machine tool body and closely cooperates with the machine tool's drive system, control system, etc. The installation position of the fixture can be designed according to the specific processing requirements and the machine tool structure to ensure that the fixture can conveniently clamp the workpiece 4 and form a reasonable processing path with the tool. At the same time, the connection between the fixture and the machine tool body is also carefully designed to ensure that the fixture remains stable during the processing and will not loosen due to vibration or external force.

[0065] When the CNC machine tool 1 starts working, the control system first inputs the processing instructions, including the shape, size, processing path and other information of the workpiece 4. Then, the drive system drives the tool and the workpiece 4 to move relative to each other according to the instructions. In this process, the workpiece rapid positioning fixture 2 plays a vital role. It first quickly locates the workpiece 4 through its unique positioning mechanism, and then firmly clamps the workpiece 4 in the predetermined position through the clamping mechanism. In this way, even during high-speed processing, the workpiece 4 can remain stable and will not be offset by vibration or external force, thereby ensuring the accuracy and efficiency of processing.

[0066] In addition, it can also be understood that the numerical control machine tool 1 according to the embodiment of the present invention has at least the following beneficial effects: the numerical control machine tool 1 is connected to the second clamping mechanism 32 through the first clamping mechanism 31, and the first clamping mechanism 31 can be driven to make the first clamping mechanism 31 abut against the inner surface of the workpiece 4 in the first direction, and the second clamping mechanism 32 can be driven by the first clamping mechanism 31 to make the second clamping mechanism 32 abut against the outer surface of the workpiece 4 in the first direction and the inner surface in the second direction. The operator only needs to drive the first clamping mechanism 31 to drive the first clamping mechanism 31 and the second clamping mechanism 32 at the same time. While the first clamping mechanism 31 and the second clamping mechanism 32 clamp the workpiece 4 at the same time, the workpiece 4 is also accurately positioned on the mounting seat 20, so as to achieve the purpose of quickly clamping the workpiece 4, shorten the clamping time, and thus improve production efficiency.

[0067] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A workpiece rapid positioning fixture, characterized in that: include: A fixed seat (10), the fixed seat (10) having a rotation center, and the fixed seat (10) is fixed on a machine tool; A mounting seat (20), the mounting seat (20) being mounted on the fixing seat (10), the mounting surface of the mounting seat (20) having a first direction and a second direction which are perpendicular to each other; and a clamping assembly (30), the clamping assembly (30) being arranged in the mounting seat (20), the clamping assembly (30) having two clamping stations (21), the two clamping stations (21) being arranged opposite to each other along the first direction of the mounting seat, the clamping assembly (30) being used to clamp and position a workpiece (4) on the clamping stations (21); Wherein, the clamping assembly (30) comprises: a first clamping mechanism (31), the first clamping mechanism (31) being arranged at the center of the mounting seat (20), the center of the first clamping mechanism (31) being coincident with the rotation center of the fixing seat (10), the first clamping mechanism (31) being used to abut against the inner surface of the workpiece (4) in the first direction; and A second clamping mechanism (32), the second clamping mechanism (32) being arranged on the mounting seat (20), the second clamping mechanism (32) being respectively located on two opposite sides of the first clamping mechanism (31), the second clamping mechanism (32) being used to abut against the outer surface of the workpiece (4) in the first direction and the inner surface in the second direction, the first clamping mechanism (31) being connected to the second clamping mechanism (32), and the first clamping mechanism (31) being driven so that the first clamping mechanism (31) and the second clamping mechanism (32) are simultaneously abutted against the outer surface of the workpiece (4).

2. The workpiece rapid positioning fixture according to claim 1, characterized in that: The first clamping mechanism (31) comprises: a first driving member (311), the first driving member (311) being rotatably disposed on the mounting seat (20), the rotation center of the first driving member (311) being coincident with the rotation center of the fixing seat (10); A first clamping block (312), wherein the first clamping block (312) is provided with two pieces, and the two first clamping blocks (312) can be slidably arranged on the mounting seat (20), and the two first clamping blocks (312) extend along the second direction, and the two first clamping blocks (312) are respectively arranged on both sides of the first driving member (311) in the first direction, and the two first clamping blocks (312) are connected by a first elastic member, and the outer surface of the first driving member (311) abuts against the inner surface of the first clamping block (312), and the outer surface of the first clamping block (312) abuts against the inner surface of the workpiece (4).

3. The workpiece rapid positioning fixture according to claim 2, characterized in that: The first driving member (311) comprises: a first driving part (3111), the upper end of the first driving part (3111) being located on the mounting seat (20); and A first rotating part (3112), the lower end of the first driving part (3111) is connected to the first rotating part (3112), the first driving part (3111) is used to drive the first rotating part (3112), the outer peripheral side of the first rotating part (3112) is in a cam shape, and the outer arc surface of the first rotating part (3112) abuts against the first clamping block (312).

4. The workpiece rapid positioning fixture according to claim 3, characterized in that: The first driving member (311) further comprises: a second rotating part (3113), the second rotating part (3113) being movably arranged between the first rotating parts (3112), the second rotating part (3113) being provided with two pieces, the two second rotating parts (3113) being rotationally symmetrical about the rotation center, the outer peripheral side of the second rotating part (3113) being in a cam shape, the two second rotating parts (3113) being connected via a second elastic member (3113a), and the two second rotating parts (3113) being slidably connected to the first rotating part (3112); and A second driving part (3114), the second driving part (3114) is sleeved on the first driving part (3111), a second driving member (3114a) is arranged on the outer peripheral side of the lower end of the second driving part (3114), the second driving member (3114a) is located between the two second rotating parts (3113), the outer peripheral side of the second driving member (3114a) is in a cam shape, the outer side surface of the second driving member (3114a) abuts against the inner surface of the second rotating part (3113), the second driving part (3114) is used to drive the second driving member (3114a), the second driving member (3114a) rotates to make the two second rotating parts (3113) slide outward relative to the first rotating part (3112).

5. The workpiece rapid positioning fixture according to claim 2, characterized in that: The second clamping mechanism (32) comprises: a third driving member (321), the third driving member (321) being rotatably disposed below the mounting seat (20), the third driving member (321) being disposed at the lower end of the first driving member (311), and the first driving member (311) being capable of driving the third driving member (321) to rotate; a transmission member (322), wherein two transmission members (322) are provided, the two transmission members (322) are arranged below the mounting seat (20), one end of the two transmission members (322) is connected to the third driving member (321), and the two transmission members (322) are respectively located on two opposite sides of the third driving member (321); and A clamping block group (323), wherein the clamping block groups (323) are respectively slidably arranged on the mounting seat (20), and two groups of the clamping block groups (323) are arranged, and the two groups of the clamping block groups (323) are respectively connected to the other ends of the two transmission members (322), and the third driving member (321) is used to drive the transmission member (322) to move, so that the transmission member (322) drives the clamping block groups (323) to respectively press against the outer surface of the workpiece (4) in the first direction and the inner surface in the second direction.

6. The workpiece rapid positioning fixture according to claim 5, characterized in that: The transmission member (322) comprises: a first connecting rod (3221), one end of the first connecting rod (3221) being connected to the third driving member (321); a second connecting rod (3222), the second connecting rod (3222) being slidably disposed at the lower end of the mounting seat (20), one end of the second connecting rod (3222) being connected to the other end of the first connecting rod (3221); and A third connecting rod (3223), wherein two third connecting rods (3223) are provided, one end of the two third connecting rods (3223) is connected to the other end of the second connecting rod (3222), and the other ends of the two third connecting rods (3223) are respectively connected to the clamping block group (323); and A fourth connecting rod (3224), the fourth connecting rod (3224) is slidably arranged in the mounting seat (20), the clamping block group (323) includes two second clamping blocks (3231), the two second clamping blocks (3231) are respectively connected to the third connecting rod (3223) through the fourth connecting rod (3224), and one end of the fourth connecting rod (3224) is connected to the second clamping block (3231).

7. The workpiece rapid positioning fixture according to claim 6, characterized in that: The third connecting rod (3223) has a waist-shaped hole (3223a), the length direction of the waist-shaped hole (3223a) extends along the length direction of the third connecting rod (3223), and the fourth connecting rod (3224) is slidably arranged in the waist-shaped hole (3223a).

8. The workpiece rapid positioning fixture according to claim 6, characterized in that: The two third connecting rods (3223) are hinged to the second connecting rod (3222), and the fourth connecting rod (3224) is rotatably disposed through the other end of the third connecting rod (3223).

9. The workpiece rapid positioning fixture according to claim 8, characterized in that: The second clamping mechanism (32) further comprises two adjusting members, the two adjusting members being arranged on the two transmission members (322) and located between the two third connecting rods (3223), the adjusting members being used to adjust the angle between the two third connecting rods (3223) so as to adjust the initial distance between the two second clamping blocks (3231).

10. A numerically controlled machine tool, characterized in that: A workpiece rapid positioning fixture (2) comprising the one described in any one of claims 1 to 9.

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