CN220296878U - Universal vice - Google Patents

Abstract

The utility model belongs to the technical field of industrial production auxiliary equipment, and particularly relates to a universal vice, which comprises a mounting seat, an opening and closing assembly and a floating clamp group; the opening and closing assembly comprises a fixed block and a sliding block; the floating clamp group comprises a first positioning clamp block, a second positioning clamp block, a first small arc clamp block and a second small arc clamp block, the first large arc clamp block is connected to the first large arc groove, and the first small arc clamp block is connected to the first small arc groove; the second large arc-shaped groove is connected with a second large arc-shaped clamp block, and the second small arc-shaped groove is connected with a second small arc-shaped clamp block; a first large arc clamp block is arranged opposite to a second large arc clamp block, and a first small arc clamp block is arranged opposite to a second small arc clamp block. The universal vice forms the floating clamping jaw, automatically aligns and clamps along with the appearance of the part, has large adaptability to the appearance shape of the part, is firm in clamping and high in efficiency, is suitable for processing various parts with special appearance, and has strong adaptability.

Description

Universal vice

Technical Field

The utility model belongs to the technical field of industrial production auxiliary equipment, and particularly relates to a universal vice.

Background

A vice is a common machining tool in the machining process, and can help people to position parts to be machined. For example, chinese patent publication No. CN114012616a discloses a universal vice, this technical scheme specifically includes the steering pedestal, the inside spacing that is fixed with of steering pedestal, the support frame is installed to the spacing lower extreme, support frame top sliding connection has the ball of rotation, the ball both sides all are fixed with tension spring, tension spring keeps away from the one end of ball of rotation and is fixed with reciprocal arm-tie, one side sliding connection that tension spring was kept away from to reciprocal arm-tie has the oil storage bag, one side through connection that the oil storage bag kept away from reciprocal arm-tie has the closed valve, the inside through connection of closed valve has the honeycomb duct, steering pedestal both sides all are fixed with the dismantlement board. However, such existing universal vice uses a clamping seat and a sliding seat with flat end surfaces to clamp the part to be machined. For some special-shaped parts (particularly cast, forged and die-cast blanks), the existing universal vice is inconvenient and unstable in clamping parts due to irregular shapes, inconsistent sizes and larger errors, the clamping parts are single, the clamping time is long, and improvement is needed.

Disclosure of Invention

The present utility model aims to provide a universal vice that solves at least the above mentioned problems of the prior art.

In order to achieve the above object, an embodiment of the present utility model provides a universal vice, including:

a mounting base;

the opening and closing assembly comprises a fixed block and a sliding block, wherein the fixed block is fixedly arranged on the mounting seat, and the sliding block is slidably arranged on the mounting seat and can slide relative to the fixed block; the sliding block is moved relative to the fixed block, so that the size of an opening between the sliding block and the fixed block is controlled;

the floating clamp group comprises a first positioning clamp block and a second positioning clamp block, the first positioning clamp block is arranged on the fixed block, and the second positioning clamp block is arranged on the sliding block;

the side surface of the first positioning clamp block, which faces the second positioning clamp block, is provided with at least one first large arc-shaped groove, the first large arc-shaped groove is connected with a first large arc-shaped clamp block capable of sliding along the radian direction of the first large arc-shaped groove, the side surface of the first large arc-shaped clamp block, which faces the second positioning clamp block, is provided with at least one first small arc-shaped groove, and the first small arc-shaped groove is connected with a first small arc-shaped clamp block capable of sliding along the radian direction of the first small arc-shaped groove; the side surface of the second positioning clamp block, which faces the first positioning clamp block, is provided with at least one second large arc-shaped groove, the second large arc-shaped groove is connected with a second large arc-shaped clamp block capable of sliding along the radian direction of the second large arc-shaped groove, the side surface of the second large arc-shaped clamp block, which faces the first positioning clamp block, is provided with at least one second small arc-shaped groove, and the second small arc-shaped groove is connected with a second small arc-shaped clamp block capable of sliding along the radian direction of the second small arc-shaped groove;

one of the first large arc-shaped clamp blocks is arranged opposite to one of the second large arc-shaped clamp blocks, and one of the first small arc-shaped clamp blocks is arranged opposite to one of the second small arc-shaped clamp blocks.

Optionally, the end surfaces of each of the first small arc-shaped clamp blocks and each of the second small arc-shaped clamp blocks are concavely provided with V-shaped grooves.

Optionally, the end surfaces of the first small arc-shaped clamp blocks and the second small arc-shaped clamp blocks, which are positioned on two sides of the V-shaped groove, are respectively formed with a rough surface, and the rough surfaces at least comprise a plurality of whole-row trapezoidal bosses.

Optionally, the side surface of the first positioning clamp block facing the second positioning clamp block is provided with two side-by-side first large arc-shaped grooves, and each first large arc-shaped groove is connected with the first large arc-shaped clamp block; the side face of the second positioning clamp block, which faces the first positioning clamp block, is provided with two side-by-side large second arc grooves, each large second arc groove is connected with a large second arc clamp block, and the two large second arc clamp blocks are arranged opposite to the two large first arc clamp blocks respectively.

Optionally, two side-by-side first small arc grooves are formed in the side surface, facing the second positioning clamp block, of the first large arc clamp block, and each first small arc groove is connected with the first small arc clamp block; the side of the second large arc-shaped clamp block facing the first positioning clamp block is provided with two side-by-side second small arc-shaped grooves, each second small arc-shaped groove is connected with the second small arc-shaped clamp block, each second small arc-shaped clamp block is connected with two second small arc-shaped clamp blocks which are respectively arranged opposite to the corresponding two first small arc-shaped clamp blocks which are connected with the first large arc-shaped clamp blocks.

Optionally, the sliding fit between the first large arc-shaped clamp block and the first large arc-shaped groove, the sliding fit between the second large arc-shaped clamp block and the second large arc-shaped groove, the sliding fit between the first small arc-shaped clamp block and the first small arc-shaped groove, and the sliding connection between the second small arc-shaped clamp block and the second small arc-shaped groove are realized by adopting a mode of matching an arc-shaped U-shaped block and an arc-shaped U-shaped groove.

Optionally, a limit structure is arranged between the arc-shaped U-shaped block and the arc-shaped U-shaped groove, and the limit structure is used for preventing the first large arc-shaped clamp block from being separated from the connection of the first large arc-shaped groove, preventing the second large arc-shaped clamp block from being separated from the connection of the second large arc-shaped groove, preventing the first small arc-shaped clamp block from being separated from the connection of the first small arc-shaped groove and preventing the second small arc-shaped clamp block from being separated from the connection of the second small arc-shaped groove.

Optionally, a screw rod mechanism is arranged on the mounting seat, the sliding block is connected with the screw rod mechanism, and the sliding block is controlled to move relative to the fixed block by controlling the screw rod mechanism.

Optionally, the screw rod mechanism includes screw rod and removal nut, the screw rod is followed the direction of movement level of sliding block rotationally install in on the mount pad, the removal nut with screw threaded connection, the sliding block with the removal nut is connected fixedly.

Optionally, two outside edges of mount pad all are provided with the direction sand grip that the level was arranged, the both sides of sliding block all be provided with direction sand grip sliding fit's guide groove.

The technical scheme of the universal vice provided by the embodiment of the utility model has at least one of the following technical effects: according to the universal vice disclosed by the utility model, the position of the sliding block is adjusted relative to the fixed block to form an opening with a preliminary proper size, then a part is placed in the opening, and the position of the sliding block is continuously adjusted until the first small arc-shaped clamp block clamps the part with the second small arc-shaped clamp block corresponding to the position. Because the first positioning clamp block can slide in the radian direction of the first large arc-shaped groove, the second positioning clamp block can slide in the radian direction of the second large arc-shaped groove, the first small arc-shaped clamp block can slide in the radian direction of the first small arc-shaped groove, and the second small arc-shaped clamp block can slide in the radian direction of the second small arc-shaped groove, so that a floating clamping jaw is formed, the clamping jaw is automatically aligned and clamped along with the appearance of a part, the adaptability to the appearance of the part is high, the clamping is firm and efficient, the clamping jaw is suitable for machining parts with various special appearances, and the adaptability is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a first view angle of a universal vice according to an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a second view angle of the universal vice according to the embodiment of the present utility model.

Fig. 3 is an exploded view of a universal vice according to an embodiment of the present utility model.

Fig. 4 is a schematic structural view of the floating clamp group of the universal vice according to the embodiment of the present utility model when clamping a part.

Wherein, each reference sign in the figure:

10-mount pad 20-opening and closing component 21-fixed block

22-sliding block 30-floating clamp group 31-first positioning clamp block

32-second positioning clamp block 33-first large arc clamp block 34-second large arc clamp block

35-first small arc clamp block 36-second small arc clamp block 40-screw rod mechanism

41-screw rod 42-moving nut 101-guiding groove

221-guiding convex strips 301-V-shaped grooves 302-rough surface

303-U-shaped block 304-U-shaped groove 311-first large arc-shaped groove

321-a second large arc-shaped groove 331-a first small arc-shaped groove 341-a second small arc-shaped groove.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to fig. 1-4 are exemplary and intended to illustrate embodiments of the present utility model and should not be construed as limiting the utility model.

In the description of the embodiments of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

In one embodiment of the present utility model, as shown in FIGS. 1-3, a universal vise is provided that includes a base 10, an opening and closing assembly 20, and a floating clamp group 30. The purpose of the mount 10 is to enable the entire universal vise arrangement to be placed on other stations or equipment. The opening and closing assembly 20 controls the size of the opening. The floating clamping jaw set 30 is the most main design feature in the utility model, and realizes a variable floating clamping jaw, so as to clamp various parts with different polarities.

The opening and closing assembly 20 comprises a fixed block 21 and a sliding block 22, wherein the fixed block 21 is fixedly arranged on the mounting seat 10, and the sliding block 22 is slidably arranged on the mounting seat 10 and can slide relative to the fixed block 21; the size of the opening between the slider 22 and the fixed block 21 is controlled by moving the slider 22 relative to the fixed block 21. The movement control structure of the slide block 22 with respect to the fixed block 21 may be manual or electric.

As shown in fig. 1 and 3, the floating clamp group 30 includes a first positioning clamp block 31 and a second positioning clamp block 32, the first positioning clamp block 31 is mounted on the fixed block 21, and the second positioning clamp block 32 is mounted on the sliding block 22. Thus, the first positioning clamp block 31 is a fixed piece, and the second positioning clamp block 32 is a movable piece, so that the adjustment and change of the size of the clamping opening are realized.

Further, as shown in fig. 3, a side surface of the first positioning clamp block 31 facing the second positioning clamp block 32 is provided with at least one first large arc-shaped groove 311, the first large arc-shaped groove 311 is connected with a first large arc-shaped clamp block 33 capable of sliding along the radian direction of the first large arc-shaped groove 311, a side surface of the first large arc-shaped clamp block 33 facing the second positioning clamp block 32 is provided with at least one first small arc-shaped groove 331, and the first small arc-shaped groove 331 is connected with a first small arc-shaped clamp block 35 capable of sliding along the radian direction of the first small arc-shaped groove 331; the side that second location pincers piece 32 faced first location pincers piece 31 is equipped with the big arc wall 321 of at least one second, is connected with the big arc wall 34 of the big arc wall 321 of second that can follow the radian direction slip of big arc wall 321 on the big arc wall 321 of second, and the side that second big arc wall 34 faced first location pincers piece 31 is equipped with the little arc wall 341 of at least one second, is connected with the little arc wall 36 of the little arc wall 341 of second that can follow the radian direction slip of little arc wall 341 on the little arc wall 341 of second. That is, in at least one embodiment, the first large arc-shaped groove 311 is provided with one, the first small arc-shaped groove 331 is provided with one, the second large arc-shaped groove 321 is provided with one, and the second small arc-shaped groove 341 is also provided with one.

Further, as shown in fig. 4, a first large arc clamp block 33 is disposed opposite a second large arc clamp block 34, and a first small arc clamp block 35 is disposed opposite a second small arc clamp block 36.

According to the universal vice disclosed by the embodiment of the utility model, the position of the sliding block 22 is adjusted relative to the fixed block 21 to form an opening with a preliminary proper size, then a part is placed in the opening, and the position of the sliding block 22 is continuously adjusted until the first small arc-shaped clamp block 35 clamps the part with the second small arc-shaped clamp block 36 corresponding to the position. Because the first positioning clamp block 31 can slide in the radian direction of the first large arc-shaped groove 311, the second positioning clamp block 32 can slide in the radian direction of the second large arc-shaped groove 321, the first small arc-shaped clamp block 35 can slide in the radian direction of the first small arc-shaped groove 331, and the second small arc-shaped clamp block 36 can slide in the radian direction of the second small arc-shaped groove 341, the fact that each small arc-shaped clamp block can do arc motion in the small arc-shaped groove of the large arc-shaped clamp block and the large arc-shaped clamp block can do arc motion in the large arc-shaped groove enables each small arc-shaped clamp block to float in the pressing direction, floating clamping jaws are formed, the clamping jaws are aligned and clamped automatically along with the appearance of parts, the clamping is firm and efficient, and is suitable for machining of various special-appearance parts and high in adaptability.

In another embodiment, as shown in fig. 3, the end surfaces of each first small arc-shaped clamp block 35 and each second small arc-shaped clamp block 36 are concavely provided with a V-shaped groove 301. Specifically, the arrangement of the V-shaped groove 301 makes the end surfaces of the first small arc-shaped clamp block 35 and the second small arc-shaped clamp block 36 have a notch, and the presence of the notch can be more beneficial to clamping parts with different shapes, so that the adaptability to clamping of opposite parts is better, and the flexibility is better. Preferably, the V-groove 301 is generally centered on the end face of the small arcuate jaw piece. Two end surface areas are also formed on both sides of the V-groove 301 for contact with the part.

In another embodiment, as shown in fig. 1 and 3, the end surfaces of each first small arc-shaped clamp block 35 and each second small arc-shaped clamp block 36 located at two sides of the V-shaped groove 301 are formed with a rough surface 302, and the rough surface 302 at least comprises a plurality of whole rows of trapezoidal bosses. Specifically, the rough surface 302 is beneficial to increasing the friction force to the clamped part, so that stability can be submitted, the rough surface 302 is formed by arranging a plurality of whole rows of trapezoidal bosses, and compared with the traditional needle-tip-shaped rough surface 302, the damage to the clamped part can be greatly reduced, and the friction force is also excellent.

In another embodiment, as shown in fig. 1, 3 and 4, the side surface of the first positioning clamp block 31 facing the second positioning clamp block 32 is provided with two side-by-side first large arc-shaped grooves 311, and each first large arc-shaped groove 311 is connected with a first large arc-shaped clamp block 33; the side of the second positioning clamp block 32 facing the first positioning clamp block 31 is provided with two side-by-side second large arc grooves 321, each second large arc groove 321 is connected with a second large arc clamp block 34, and the two second large arc clamp blocks 34 are respectively arranged opposite to the two first large arc clamp blocks 33. Specifically, in this embodiment, two first large arc-shaped pliers blocks 33 are designed side by side, and two second large arc-shaped pliers blocks 34 are arranged side by side, so that the formed floating clamp group 30 can adapt to clamping parts with longer overall length and different shapes, and the application range of the clamped parts is wider.

In another embodiment, as shown in fig. 1 and 3, the side of the first large arc-shaped clamp block 33 facing the second positioning clamp block 32 is provided with two side-by-side first small arc-shaped grooves 331, and each first small arc-shaped groove 331 is connected with a first small arc-shaped clamp block 35; the side of the second large arc-shaped clamp block 34 facing the first positioning clamp block 31 is provided with two side-by-side second small arc-shaped grooves 341, each second small arc-shaped groove 341 is connected with a second small arc-shaped clamp block 36, and the two second small arc-shaped clamp blocks 36 connected to each second large arc-shaped clamp block 34 are respectively arranged opposite to the two first small arc-shaped clamp blocks 35 connected to the corresponding first large arc-shaped clamp blocks 33. In this embodiment, the first small arc-shaped pliers block 35 and the second small arc-shaped pliers block 36 respectively form two groups, so that the shape of the part can be self-adapted by four small degrees of freedom and at least two large degrees of freedom, the clamping adaptability to parts with different shapes is further improved, the included angles are diversified, and wider working requirements are met.

In another embodiment, as shown in fig. 1 and 3, the sliding fit between the first large arc clamp block 33 and the first large arc slot 311, the sliding fit between the second large arc clamp block 34 and the second large arc slot 321, the sliding fit between the first small arc clamp block 35 and the first small arc slot 331, and the sliding connection between the second small arc clamp block 36 and the second small arc slot 341 are all implemented by adopting the way of matching the arc-shaped U-shaped block 303 and the arc-shaped U-shaped slot 304. Specifically, set up arc U type piece 303 in one of them concave surface in arc groove and the evagination face of arc pincers piece, the another one sets up arc U type groove 304, with arc U type piece 303 and arc U type groove 304 sliding fit, the arc pincers piece can slide along the crooked direction of cambered surface in arc U type groove 304 like this, can the certain angle of rotation of circumference, can realize the self-adaptation according to the automatic certain angle of sliding of the part of the different shapes of centre gripping like this, it is very nimble, convenient to use.

In another embodiment, a limiting structure (not shown) is disposed between the arc-shaped U-shaped block 303 and the arc-shaped U-shaped groove 304, wherein the limiting structure is used for preventing the first large arc-shaped clamp block 33 from being separated from the first large arc-shaped groove 311, preventing the second large arc-shaped clamp block 34 from being separated from the second large arc-shaped groove 321, preventing the first small arc-shaped clamp block 35 from being separated from the first small arc-shaped groove 331, and preventing the second small arc-shaped clamp block 36 from being separated from the second small arc-shaped groove 341. Specifically, through the setting of this limit structure, can guarantee that each big or little arc U type piece 303 can not deviate from in the slip in-process in arc U type groove 304, promptly slides in certain stroke. The limiting structure can be realized by adopting structures such as a screw or a blocking block.

In another embodiment, as shown in fig. 1-3, a screw mechanism 40 is provided on the mounting base 10, the sliding block 22 is connected with the screw mechanism 40, and the sliding block 22 is controlled to move relative to the fixed block 21 by controlling the screw mechanism 40. Specifically, the screw mechanism 40 is used for controlling the sliding block 22 to slide on the mounting base 10 along a certain direction, so that the sliding block 22 can be opened and closed with the fixed block 21, and the clamping of the parts is convenient.

In another embodiment, as shown in fig. 1 to 3, the screw mechanism 40 includes a screw 41 and a moving nut 42, the screw 41 is horizontally rotatably mounted on the mounting base 10 along the moving direction of the sliding block 22, the moving nut 42 is in threaded connection with the screw 41, and the sliding block 22 is fixedly connected with the moving nut 42. Specifically, in this embodiment, the rotation of the screw rod 41 is automatically or manually controlled, so that the moving nut 42 screwed on the screw rod 41 can move along the axial direction of the screw rod 41, and thus, the sliding block 22 is fixed with the moving nut 42, and the sliding block 22 is driven to move by the movement of the moving nut 42, so that the opening and the shrinking of the opening of the fixed block 21 can be adjusted, and the operation is very convenient and fast.

In another embodiment, as shown in fig. 1 and 3, two outer side edges of the mounting seat 10 are provided with guide ribs 221 horizontally arranged, and two sides of the sliding block 22 are provided with guide grooves 101 in sliding fit with the guide ribs 221. Specifically, the guide ribs 221 are limited in the guide grooves 101, so that the sliding block 22 can be ensured not to deviate from the mounting seat 10 in the sliding process, and the structural design is more stable and reliable.

The above at least one embodiment of the utility model can be realized at least, one workpiece is clamped for only 0.2 minutes, and secondary clamping is not needed in processing, so that defective products caused by workpiece displacement generated by secondary clamping are avoided, the production efficiency is improved, clamping time is saved by 2.8 minutes according to each workpiece, 1000 workpieces are batched, and the time can be saved by about 46 hours. Compared with the clamp in the prior art, the clamp takes about 1.5 minutes to clamp, the position of the pressing plate needs to be replaced in the machining process, the time for clamping a part to be machined is about 1.5 minutes, and the production efficiency and the production quality are greatly improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A universal vice, characterized in that: comprising the following steps:

a mounting base;

the opening and closing assembly comprises a fixed block and a sliding block, wherein the fixed block is fixedly arranged on the mounting seat, and the sliding block is slidably arranged on the mounting seat and can slide relative to the fixed block; the sliding block is moved relative to the fixed block, so that the size of an opening between the sliding block and the fixed block is controlled;

the floating clamp group comprises a first positioning clamp block and a second positioning clamp block, the first positioning clamp block is arranged on the fixed block, and the second positioning clamp block is arranged on the sliding block;

the side surface of the first positioning clamp block, which faces the second positioning clamp block, is provided with at least one first large arc-shaped groove, the first large arc-shaped groove is connected with a first large arc-shaped clamp block capable of sliding along the radian direction of the first large arc-shaped groove, the side surface of the first large arc-shaped clamp block, which faces the second positioning clamp block, is provided with at least one first small arc-shaped groove, and the first small arc-shaped groove is connected with a first small arc-shaped clamp block capable of sliding along the radian direction of the first small arc-shaped groove; the side surface of the second positioning clamp block, which faces the first positioning clamp block, is provided with at least one second large arc-shaped groove, the second large arc-shaped groove is connected with a second large arc-shaped clamp block capable of sliding along the radian direction of the second large arc-shaped groove, the side surface of the second large arc-shaped clamp block, which faces the first positioning clamp block, is provided with at least one second small arc-shaped groove, and the second small arc-shaped groove is connected with a second small arc-shaped clamp block capable of sliding along the radian direction of the second small arc-shaped groove;

one of the first large arc-shaped clamp blocks is arranged opposite to one of the second large arc-shaped clamp blocks, and one of the first small arc-shaped clamp blocks is arranged opposite to one of the second small arc-shaped clamp blocks.

2. The universal vise according to claim 1, wherein: the end surfaces of the first small arc clamp blocks and the second small arc clamp blocks are concavely provided with V-shaped grooves inwards.

3. The universal vise according to claim 2, wherein: the end surfaces of the first small arc clamp blocks and the second small arc clamp blocks, which are positioned on two sides of the V-shaped groove, are respectively provided with a rough surface, and the rough surfaces at least comprise a plurality of whole-row trapezoidal bosses.

4. The universal vise according to claim 1, wherein: the side surface of the first positioning clamp block, which faces the second positioning clamp block, is provided with two side-by-side first large arc-shaped grooves, and each first large arc-shaped groove is connected with the first large arc-shaped clamp block; the side face of the second positioning clamp block, which faces the first positioning clamp block, is provided with two side-by-side large second arc grooves, each large second arc groove is connected with a large second arc clamp block, and the two large second arc clamp blocks are arranged opposite to the two large first arc clamp blocks respectively.

5. The universal vise according to claim 1, wherein: the side surface of the first large arc-shaped clamp block, which faces the second positioning clamp block, is provided with two parallel first small arc-shaped grooves, and each first small arc-shaped groove is connected with the first small arc-shaped clamp block; the side of the second large arc-shaped clamp block facing the first positioning clamp block is provided with two side-by-side second small arc-shaped grooves, each second small arc-shaped groove is connected with the second small arc-shaped clamp block, each second small arc-shaped clamp block is connected with two second small arc-shaped clamp blocks which are respectively arranged opposite to the corresponding two first small arc-shaped clamp blocks which are connected with the first large arc-shaped clamp blocks.

6. The universal vise according to any one of claims 1 to 5, wherein: the sliding connection between the first large arc-shaped clamp block and the first large arc-shaped groove, the sliding connection between the second large arc-shaped clamp block and the second large arc-shaped groove, the sliding connection between the first small arc-shaped clamp block and the first small arc-shaped groove, and the sliding connection between the second small arc-shaped clamp block and the second small arc-shaped groove are realized by adopting an arc-shaped U-shaped block and arc-shaped U-shaped groove matching mode.

7. The universal vise according to claim 6, wherein: be provided with limit structure between arc U type piece with arc U type groove, limit structure be used for preventing first big arc pincers piece deviate from with the connection of first big arc groove, be used for preventing the second big arc pincers piece deviate from with the connection of second big arc groove, be used for preventing first little arc pincers piece deviate from with the connection of first little arc groove and be used for preventing the second little arc pincers piece deviate from with the connection of second little arc groove.

8. The universal vise according to any one of claims 1 to 5, wherein: the mounting seat is provided with a screw rod mechanism, the sliding block is connected with the screw rod mechanism, and the sliding block is controlled to move relative to the fixed block by controlling the screw rod mechanism.

9. The universal vise according to claim 8, wherein: the screw rod mechanism comprises a screw rod and a movable nut, the screw rod is horizontally rotatably arranged on the mounting seat along the moving direction of the sliding block, the movable nut is in threaded connection with the screw rod, and the sliding block is fixedly connected with the movable nut.

10. The universal vise according to any one of claims 1 to 5, wherein: the two outer side edges of the mounting seat are provided with guide convex strips which are horizontally arranged, and the two sides of the sliding block are provided with guide grooves which are in sliding fit with the guide convex strips.