Self-centering rotary special-shaped vice

Abstract

This utility model relates to the field of machining fixture technology, specifically a self-centering rotary vise, comprising a base, a movable vise body, and a platform base. Two platform bases can slide synchronously and in the same direction on the base. A base synchronous sliding drive device is provided on the base. A movable vise body is rotatably mounted on each platform base. At least two pin holes A are evenly distributed on the platform base with the rotation center of the movable vise body as the center. The movable vise body is provided with pin holes B corresponding to pin holes A. Pins are installed in pin holes A and pin holes B. Clamping surfaces corresponding to the number of pin holes A are provided on the side of the movable vise body. The clamping surfaces of the two movable vises are used in pairs. This self-centering rotary vise has the technical advantages of efficient self-centering clamping, rapid indexing rotation, multi-type clamping adaptability, high precision and stability, low cost and easy maintenance.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, specifically to a self-centering rotating irregular-shaped vise. Background Technology

[0002] In modern machining, the vise, as a key clamping tool, directly affects machining accuracy and efficiency. However, traditional vises have many limitations in practical applications, making it difficult to meet increasingly diverse machining needs. These limitations manifest in the following aspects: Insufficient self-centering function: Existing vises generally lack an effective self-centering mechanism. For example, the rotary vise disclosed in Chinese patent CN20181012345 only achieves clamping through unilateral movement, and cannot achieve symmetrical synchronous movement on both sides of the vise body. This design leads to workpiece eccentricity during clamping, and the repeatability error is usually greater than 0.1mm, which seriously restricts the improvement of machining accuracy.

[0003] Low indexing and positioning efficiency: The indexing and rotation function is a key feature of vises to adapt to complex machining needs, but existing technologies perform poorly in this regard. For example, the hexagonal jaw structure in Japanese Patent Application Publication No. 2020-56789, while possessing multi-angle positioning capabilities, lacks a precision indexing mechanism. During changeover operations, manual alignment and repeated adjustments are required, with each changeover taking more than 2 minutes, significantly reducing production efficiency.

[0004] Limited functionality and high cost: Traditional vises typically have a fixed clamping surface design. If it is necessary to switch the clamping type (such as from V-groove to flat clamping), the entire jaw assembly must be disassembled and replaced, which takes an average of more than 3 minutes. In addition, because multi-functional vises integrate multiple complex mechanisms, their manufacturing cost is often more than 3 times that of ordinary vises, limiting their application in mass production.

[0005] Limited maintenance and compatibility: Existing vises have a low degree of modularity, and jaw replacement and maintenance require specialized tools and skills, increasing operating costs. Furthermore, the clamping requirements for different types of workpieces vary significantly, making it difficult for traditional vises to adapt to diverse machining scenarios through simple adjustments, resulting in low equipment utilization.

[0006] To address the aforementioned issues, developing a modular vise with efficient self-centering, rapid indexing rotation, and multi-functional clamping surfaces has become an urgent need to improve machining efficiency and precision. Utility Model Content

[0007] To address the aforementioned issues, this utility model provides a self-centering rotating irregular-shaped vise, which offers the technical advantages of efficient self-centering clamping, rapid indexing rotation, multi-type clamping adaptability, high precision and stability, low cost, and easy maintenance.

[0008] The technical solution of this utility model is as follows: A self-centering rotating irregular-shaped vise includes a base, a movable vise body, and a platform base. Two platform bases can slide synchronously and in the same direction on the base. A base synchronous sliding drive device is provided on the base. A movable vise body is rotatably mounted on each platform base. At least two pin holes A are evenly distributed on the platform base with the rotation center of the movable vise body as the center. A pin hole B corresponding to the pin hole A is provided on the movable vise body. A pin is installed in the pin hole A and pin hole B. A clamping surface corresponding to the number of pin holes A is provided on the side of the movable vise body. The clamping surfaces of the two movable vises are used in pairs.

[0009] There are six pin holes, A and B.

[0010] The six clamping surfaces on the side of the movable clamp body are any combination of a planar clamping surface, an axial V-groove A, an axial V-groove B, a radial V-groove A, a radial V-groove B, and a 45° dovetail groove.

[0011] The base is equipped with guide rails, and the platform base is fixedly connected to the slider that cooperates with the guide rails.

[0012] The base synchronous sliding drive device includes a lead screw, which is a bidirectional trapezoidal lead screw. Both ends of the lead screw are rotatably mounted on the base. The center of the slider is provided with a trapezoidal threaded hole that mates with the lead screw. When the lead screw rotates, the sliders mounted on both sides of the bidirectional trapezoidal lead screw can move in the same direction.

[0013] The end of the lead screw is fixedly connected with bolts.

[0014] A central rotating shaft is fixedly installed on the platform base. A central hole is provided in the center of the movable clamp body. The central hole and the central rotating shaft are clearance-fitted. The end of the central rotating shaft is provided with an external thread. After the movable clamp body is installed on the platform base, the nut is tightened on the external thread to secure the movable clamp body to the platform base.

[0015] The central shaft is fitted with a copper bushing, which is clearance-fitted with the central hole.

[0016] The contact surfaces of the guide rail are plated with hard chrome.

[0017] The thickness of the hard chrome plating is 0.05 mm.

[0018] The movable clamp body has six clamping surfaces on its side, which are any combination of at least three types of clamping surfaces: dovetail groove, axial V-groove, radial V-groove, and planar clamping surface.

[0019] The beneficial effects of this utility model are as follows: 1. The present invention discloses a self-centering rotating irregular-shaped vise, which is driven by a bidirectional trapezoidal screw to realize synchronous and unidirectional sliding of the two platform bases and the movable vise body, which can quickly complete the self-centering clamping of the workpiece and improve the clamping efficiency.

[0020] 2. The present invention discloses a self-centering rotating irregular-shaped vise, which has pin holes evenly distributed on the movable vise body, and uses pins to achieve rapid indexing and rotation positioning, meeting different processing needs, and making changeover convenient and efficient.

[0021] 3. The present invention discloses a self-centering rotating irregular-shaped vise, which has multiple clamping surfaces on the side of the movable vise body, which can be arbitrarily combined to adapt to various workpiece shapes and meet diverse processing scenarios.

[0022] 4. The present invention discloses a self-centering rotating irregular-shaped vise, wherein the self-centering rotating irregular-shaped vise has hard chrome plated on the guide rail contact surface to enhance wear resistance, and together with the high repeatability positioning accuracy of the bidirectional trapezoidal screw, it ensures clamping accuracy and stability under long-term use.

[0023] 5. The present invention discloses a self-centering rotating irregular-shaped vise. The self-centering rotating irregular-shaped vise has a simplified structure, low manufacturing cost, and modular design that facilitates replacement and maintenance, thereby reducing usage costs. Attached Figure Description

[0024] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0025] In the attached diagram: Figure 1 This is a three-dimensional exploded view of a self-centering rotating irregular-shaped vise according to an embodiment of the present utility model. Figure 2 This is a three-dimensional structural diagram of a self-centering rotating irregular-shaped vise after assembly, according to an embodiment of the present utility model. Figure 3 This is a three-dimensional structural diagram of the movable jaw of a self-centering rotating irregular-shaped vise according to an embodiment of the present invention. Figure 1 ; Figure 4 This is a three-dimensional structural diagram of the movable jaw of a self-centering rotating irregular-shaped vise according to an embodiment of the present invention. Figure 2 ; Figure 5 This is a three-dimensional structural diagram of a self-centering rotating irregular-shaped vise in which a shaft-type part is clamped around its circumference, according to an embodiment of the present utility model. Figure 6This is a top view of a self-centering rotating irregular-shaped vise according to an embodiment of the present invention when clamping the circumference of a shaft-type part; Figure 7 for Figure 6 Sectional view of AA; Figure 8 This is a three-dimensional structural diagram of a self-centering rotating irregular-shaped vise in an embodiment of the present invention when clamping a plane of a shaft-type part. Figure 9 This is a top view of a self-centering rotating irregular-shaped vise according to an embodiment of the present invention when clamping a shaft-type part in a plane; Figure 10 for Figure 9 BB section view; Figure 11 This is a three-dimensional structural diagram of a self-centering rotating irregular-shaped vise used to clamp dovetail-shaped parts according to an embodiment of the present utility model. Figure 12 This is a top view of a self-centering rotating irregular-shaped vise in the present invention when clamping dovetail-shaped parts; Figure 13 for Figure 2 CC section view; The components represented by the various reference numerals in the diagram are: This utility model includes: 100, base; 101, left movable clamp body; 102, right movable clamp body; 103, guide rail; 104, slider; 105, planar clamping surface; 106, axial V-groove A; 107, axial V-groove B; 108, radial V-groove A; 109, radial V-groove B; 110, 45° dovetail groove; 201, platform base; 202, pin hole A; 301, central rotating shaft; 302, nut; 303, pin hole B; 304, pin; 305, copper sleeve; 401, bolt; 402, lead screw; 500, shaft-like parts; 600, dovetail-like parts. Detailed Implementation

[0026] like Figure 1 and Figure 2 As shown, the self-centering rotating irregular-shaped vise includes a base 100, on which a guide rail 103 is mounted. The contact surface of the guide rail 103 is plated with hard chrome to enhance wear resistance. Two platform bases 201 are connected to the guide rail 103 via sliders 104, and can slide in the same direction and synchronously on the base 100. The center of the slider 104 is provided with a trapezoidal threaded hole that cooperates with a bidirectional trapezoidal lead screw 402. The two ends of the lead screw 402 are rotatably mounted on the base 100 (e.g., by bearing installation), and bolts 401 are fixedly connected to its ends. By rotating the bolts 401, the lead screw 402 can be driven to rotate, thereby driving the sliders 104 on both sides and the platform bases 201 to move in the same direction.

[0027] Each platform base 201 is fixedly equipped with a central rotating shaft 301, and a copper sleeve 305 is fitted over the central rotating shaft 301. The movable clamp body has a central hole at its center, which is clearance-fitted with the copper sleeve 305 to allow the movable clamp body to be rotatably installed on the platform base 201. The end of the central rotating shaft 301 is provided with an external thread. After the movable clamp body is installed, it is tightened onto the external thread by a nut 302 to secure the movable clamp body to the platform base 201.

[0028] The platform base 201 has six pin holes A202 evenly distributed around the rotation center of the movable clamp body, and the movable clamp body has six corresponding pin holes B303. Pins 304 are installed in pin holes A202 and pin holes B303 for rotational positioning of the movable clamp body.

[0029] like Figure 3 and Figure 4 As shown, the movable clamp body has six clamping surfaces on its side. In this embodiment, the six clamping surfaces are a combination of planar clamping surface 105, axial V-groove A106, axial V-groove B107, radial V-groove A108, radial V-groove B109, and 45° dovetail groove 110 (any combination of three or more other types can also be selected according to actual needs). The clamping surfaces of the two movable clamp bodies are used in pairs to adapt to the clamping requirements of workpieces of different shapes. The axial V-groove A106 and axial V-groove B107 have different dimensions, and the radial V-groove A108 and radial V-groove B109 have different dimensions.

[0030] In practical use, a suitable clamping surface is selected according to the shape of the workpiece. The movable clamp body is rotated and the pin 304 is inserted for positioning. Then, the screw 402 is driven by rotating the bolt 401, so that the two platform bases 201 and the movable clamp body move synchronously towards the center to complete the self-centering clamping of the workpiece. Example

[0031] The self-centering rotating irregular vise includes a symmetrically arranged left movable vise body 101 and a right movable vise body 102, which move synchronously through a bidirectional trapezoidal lead screw 402. The bottom of the vise body is provided with a hexagonal platform base 201, and the surface of the platform base 201 is engaged with a positioning pin 304 through a pin hole A202 to achieve rapid positioning.

[0032] The platform base 201 is fitted with the copper sleeve 305 through the central rotating shaft 301 with clearance (H7 / g6) and locked by the external hexagonal nut 302. Six positioning pin holes B303 are evenly distributed on the top of the left movable clamp body 101 and the right movable clamp body 102 to achieve precise indexing rotation of 60°±0.5°.

[0033] The left movable clamp 101 and the right movable clamp 102 are machined with dovetail grooves, axial V-grooves, radial V-grooves and planar clamping surfaces on each side, and can be modularly replaced to meet the clamping needs of various types of workpieces.

[0034] This device has a changeover time of ≤15 seconds, a manufacturing cost of 30% of traditional fixtures, and a repeatability accuracy of ±0.02mm, significantly improving clamping efficiency and economy.

[0035] The left movable clamp 101 and the right movable clamp 102 are slidably connected by a bottom rectangular guide rail 103. The contact surface of the guide rail is plated with hard chrome with a thickness of 0.05mm. The drive mechanism includes double-sided external hexagonal bolts 401 and a double-sided trapezoidal lead screw 402. The threads of the left and right sections of the lead screw are opposite, with a pitch tolerance of ±0.01mm, which drives the left movable clamp 101 and the right movable clamp 102 to move synchronously.

[0036] The six clamping surfaces of the left movable clamp 101 and the right movable clamp 102 are respectively machined into at least three combinations of dovetail groove (angle 45°), axial V-groove, radial V-groove and planar clamping surface, and the material is 40Cr quenched and tempered (HRC28-32).

[0037] The bidirectional trapezoidal lead screw 402 has a repeatability of ±0.02mm and is manually driven by the external hexagonal bolt 401 to achieve self-centering clamping of the clamp body.

[0038] When clamping shaft-type parts, rotate the left movable clamp 101 and the right movable clamp 102 to select the axial V-shaped clamping surface, insert the pin 304 to fix the direction, and tighten the nut 302 to fix it; rotate the external hex bolt 401 to drive the lead screw 402, and the two clamps move synchronously towards the center to achieve self-centering clamping. The clamping effect is as follows: Figures 5 to 7 As shown; by Figures 5 to 7 It can be seen that this shaft-type part requires lateral drilling on the left side. After the above machining is completed, the jaws can be loosened, pin 304 removed, and the part rotated to the flat clamping surface. The pin can then be inserted and re-clamped for positioning. The entire process takes ≤15 seconds to machine the lateral hole. (See attached image) Figures 8 to 10 As shown.

[0039] Clamping with dovetail parts, such as Figures 11 to 13 As shown, the process is similar to that of shaft parts, and will not be described in detail here.

[0040] This self-centering rotary vise enables efficient workpiece changeover: the combination of modular jaws and an indexing positioning system reduces changeover time by less than 15 seconds and increases efficiency by 90%; it boasts high precision: the bidirectional trapezoidal lead screw provides repeatability of ±0.02mm, and hard chrome guide rails ensure long-term stability; it is low-cost: the simplified structure reduces manufacturing costs to only 30% of traditional fixtures; and it is multifunctional: it supports various clamping surface combinations, covering more than 90% of common workpiece types.

Claims

1. A self-centering rotating irregular-shaped vise, characterized in that, The device includes a base (100), a movable clamp body, and a platform base (201). The two platform bases (201) can slide synchronously on the base (100) in the same direction. A base synchronous sliding drive device is provided on the base (100). A movable clamp body is rotatably mounted on each platform base (201). At least two pin holes A (202) are evenly distributed on the platform base (201) with the rotation center of the movable clamp body as the center. A pin hole B (303) corresponding to the pin hole A (202) is provided on the movable clamp body. A pin (304) is installed in the pin hole A (202) and the pin hole B (303). A clamping surface corresponding to the number of pin holes A (202) is provided on the side of the movable clamp body. The clamping surfaces of the two movable clamp bodies are used in pairs.

2. The self-centering rotating irregular-shaped vise according to claim 1, characterized in that, The number of pin holes A (202) and pin holes B (303) is six.

3. A self-centering rotating irregular-shaped vise according to claim 2, characterized in that, The six clamping surfaces on the side of the movable clamp body are any combination of the following: planar clamping surface (105), axial V-groove A (106), axial V-groove B (107), radial V-groove A (108), radial V-groove B (109), and 45° dovetail groove (110).

4. A self-centering rotating irregular-shaped vise according to claim 1, characterized in that, The base (100) is provided with a guide rail (103), and the platform base (201) is fixedly connected to the slider (104) that cooperates with the guide rail (103).

5. A self-centering rotating irregular-shaped vise according to claim 4, characterized in that, The base synchronous sliding drive device includes a lead screw (402), which is a bidirectional trapezoidal lead screw. Both ends of the lead screw (402) are rotatably mounted on the base (100). The center of the slider (104) is provided with a trapezoidal threaded hole that cooperates with the lead screw (402). When the lead screw (402) rotates, the sliders (104) mounted on both sides of the bidirectional trapezoidal lead screw can move in the same direction.

6. A self-centering rotating irregular-shaped vise according to claim 5, characterized in that, The end of the lead screw (402) is fixedly connected to a bolt (401).

7. A self-centering rotating irregular-shaped vise according to claim 1, characterized in that, A central rotating shaft (301) is fixedly installed on the platform base (201). A central hole is provided in the center of the movable clamp body. The central hole is clearance-fitted with the central rotating shaft (301). The end of the central rotating shaft (301) is provided with an external thread. When the movable clamp body is installed on the platform base (201), the movable clamp body is fastened to the platform base (201) by tightening the nut (302) on the external thread.

8. A self-centering rotating irregular-shaped vise according to claim 7, characterized in that, The central rotating shaft (301) is fitted with a copper sleeve (305), which is clearance-fitted with the central hole.

9. A self-centering rotating irregular-shaped vise according to claim 4, characterized in that, The contact surface of the guide rail (103) is plated with hard chrome.

10. A self-centering rotating irregular-shaped vise according to claim 1, characterized in that, The movable clamp body has six clamping surfaces on its side, which are any combination of at least three types of clamping surfaces: dovetail groove, axial V-groove, radial V-groove, and planar clamping surface.

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