A tooling for quickly and accurately positioning angles and lengths in double-head machining

Abstract

The present invention discloses a tooling for realizing rapid and accurate positioning of length and angle for double-head machining, which includes a positioning rod, a positioning tooling main body, and an angle positioning module. The positioning tooling main body is installed at the end of the positioning rod, the angle positioning module is assembled on the positioning tooling main body, and a tail positioning mechanism is sleeved on the positioning rod. The present invention relates to the technical field of machining tooling. This rapid positioning tooling for double-head machining. The movable V-shaped groove can meet the angle positioning and machining of parts with parallel or taper symmetry planes within a certain range. Considering that the flat and thick dimensions for angle positioning are large or small, the spring can expand and contract accordingly to ensure that the length positioning is not affected by the angle positioning. The length and angle positioning tooling can flexibly change the angle and length of part machining. Compared with the traditional rotation adjustment of the threaded rod, the length and angle adjustment acting mechanisms are relatively separated and do not affect each other, improving the positioning accuracy of double-head parts, increasing the machine adjustment speed, and reducing the scrapped products during machine adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of machining tooling, and specifically to a tooling for realizing rapid and accurate positioning of angles and lengths in double-head machining. Background Technique

[0002] Existing machining methods usually use milling machines or lathes for milling, or improved multi-sided milling machines. However, for many metal parts, both ends need to be machined. For example, the common bicycle pedal axle is a double-head parallel taper square part. Usually, one end of the metal part is machined first, and then the other end is machined. Since one end of the metal shaft has been machined, when machining the second end, a U-shaped or V-shaped groove is usually used to connect to the screw for length and angle positioning. The U-shaped reference patent is CN200920286605, a threaded rod pin for a long shaft machining process, but the following problems will occur: When using the U-shaped groove for angle positioning, there is a clearance fit between the width of the U-groove and the flat thickness. When positioning, the flat end of the machined part is inserted into the U-groove and rotated until it cannot rotate anymore and then clamped. The accuracy of angle positioning is affected by the flat thickness tolerance. When using the V-shaped groove for positioning, the angle is not affected by the flat thickness tolerance, but the length is affected by the flat thickness. In the case of low precision requirements, the above two methods can be applied, but there are defects such as slow angle adjustment and relying on feel. Moreover, when switching to parts of different lengths with the same angle, due to the mutual influence of angle and length adjustment, it is necessary to start adjusting from the beginning, which is time-consuming and laborious and wastes the adjusted products. In view of this, in-depth research on the above problems has led to the generation of this case. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the present invention provides a tooling for realizing rapid and accurate positioning of angles and lengths in double-head machining, which solves the problems of the existing background technology.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: A tooling for realizing rapid and accurate positioning of angles and lengths in double-head machining includes a positioning rod, a positioning tooling main body, and an angle positioning module. The positioning tooling main body is installed at the end of the positioning rod, the angle positioning module is assembled on the positioning tooling main body, and a tail positioning mechanism is sleeved on the positioning rod;

[0005] An active V-shaped groove is opened on the angle positioning module, and a part length positioning core is provided on the positioning tooling main body and penetrates through to the active V-shaped groove;

[0006] The tail positioning mechanism includes: a rotating disk, a fixed disk, a pair of arc-shaped holes, a pair of connecting bolts, and a number of force application holes;

[0007] A rotating disk is sleeved outside the positioning rod. A fixed disk is coaxially arranged on one side of the rotating disk. The axis of the rotating disk matches the shape of the positioning rod and is mutually limited. A pair of arc-shaped holes are opened on the rotating disk. A pair of connecting bolts are arranged on the pair of arc-shaped holes and penetrate through the pair of arc-shaped holes to be threadedly connected with the fixed disk. The fixed disk is of an annular structure and a width larger than that of the fixed rod is opened at the center. A plurality of force-applying holes are arranged in an annular array on the arc-shaped wall surface of the fixed disk. A limiting sleeve coaxial with the rotating disk is arranged on one side of the rotating disk. A fixing bolt is threadedly connected to the limiting sleeve and tightly abuts against the outer wall of the positioning rod.

[0008] Preferably, semi-connected shrinkage grooves and completely penetrated shrinkage grooves are respectively arranged on both sides of the inner arc of the fixed disk.

[0009] Preferably, a fastening bolt is arranged on the completely penetrated shrinkage groove on one side to connect both ends of the opposite fixed disk.

[0010] Preferably, a plurality of scale lines are arranged in an annular array on the circumferential wall surface of the rotating disk.

[0011] Preferably, the pair of connecting bolts are internal hexagonal bolts and the width of the end part is larger than the width of the arc-shaped hole.

[0012] Preferably, the angle positioning module is inserted into the through groove of the positioning tooling main body, and the movable V-shaped groove penetrates through the end part of the angle positioning module.

[0013] Preferably, a cylindrical groove is opened on the positioning tooling main body. The part length positioning core is installed on the axis of the cylindrical groove, and a spring is sleeved outside the part length positioning core to connect the end part of the angle positioning module.

[0014] Preferably, the movable rod is a positioning rod with a non-circular cross-section.

[0015] Beneficial effects

[0016] The present invention provides a tooling for achieving rapid and accurate positioning of angles and lengths in double-head machining. It has the following beneficial effects: This rapid positioning tooling for double-head machining can meet the angle positioning and machining of parts with parallel or taper symmetric planes within a certain range by using movable V-grooves, reducing the types of fixtures and the number of switching times. The length positioning is independent of the angle positioning. Considering that the flat and thick dimensions for angle positioning vary, the spring can expand and contract accordingly to ensure that the length positioning is not affected by the angle positioning. The length and angle positioning tooling can flexibly change the angles and lengths of parts being machined. Compared with the traditional rotation adjustment of threaded rods, the mechanisms for length and angle adjustment are relatively separated and do not affect each other. Under the condition of unchanged angle positioning, products of different length specifications can be switched in seconds. The present invention realizes the independent positioning of angles and lengths, ensures that the length positioning accuracy is not affected by the angle positioning, improves the positioning accuracy of double-head parts, increases the machine adjustment speed, and reduces the scrapped products during machine adjustment. The V-grooves take into account the positioning of flat and thick dimensions within a certain range and are of interchangeable modular design, reducing the number of toolings and saving tooling costs. The positioning tooling is connected to the pull pipe of the fixture and adopts a shrinkage groove structure to protect the threads of the pull pipe, improving the service life of the pull pipe and the positioning tooling compared with the traditional connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is the main view axonometric drawing of a tooling for achieving rapid and accurate positioning of angles and lengths in double-head machining according to the present invention.

[0018] Figure 2 FIG. is the rear view axonometric drawing of a tooling for achieving rapid and accurate positioning of angles and lengths in double-head machining according to the present invention.

[0019] Figure 3 FIG. is the axonometric drawing of the main body of the positioning tooling for a tooling for achieving rapid and accurate positioning of angles and lengths in double-head machining according to the present invention.

[0020] Figure 4 FIG. is the axonometric drawing of the tail positioning mechanism of a tooling for achieving rapid and accurate positioning of angles and lengths in double-head machining according to the present invention.

[0021] In the figures: 1, positioning rod; 2, main body of the positioning tooling; 3, angle positioning module; 4, rotating disk; 5, fixed disk; 6, arc-shaped hole; 7, connecting bolt; 8, force application hole; 9, shrinkage groove; 10, fastening bolt; 11, scale line; 12, fixing bolt; 201, part length positioning core; 202, cylindrical groove; 301, movable V-groove; 302, spring; 303, guide post. DETAILED DESCRIPTION OF THE INVENTION

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Those skilled in the art will connect the components in this case in sequence. For the specific connection and operation sequence, reference should be made to the following working principle. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process.

[0024] Embodiment: According to the attached drawings of the specification Figures 1-4 As can be seen, this case is a tooling for realizing quick and accurate positioning of angles and lengths for double-head machining, including a positioning rod 1, a positioning tooling main body 2, and an angle positioning module 3. The positioning tooling main body 2 is installed at the end of the positioning rod 1, and the angle positioning module 3 is assembled on the positioning tooling main body 2. A tail positioning mechanism is sleeved on the positioning rod 1. In the specific implementation process, the positioning rod 1 is installed at the end of the positioning tooling main body 2. Through the angle positioning module 3, the parts can be quickly fixed. The parts to be processed are mainly double-head parallel taper square parts, such as the pedal shaft of a bicycle, etc.

[0025] An active V-shaped groove 301 is provided on the angle positioning module 3, and a part length positioning core 201 is provided on the positioning tooling main body 2 and penetrates through to the active V-shaped groove 301. In the specific application process, the processed hypotenuse of the part is abutted against the active V-shaped groove 301, and the end of the part is made to contact the part length positioning core 201 to perform the length positioning function. The length of the positioning rod 1 can be adjusted through the tail positioning mechanism.

[0026] According to the attached drawings of the specification Figures 1-4 As can be seen, the above-mentioned tail positioning mechanism includes: a rotating disk 4, a fixed disk 5, a pair of arc-shaped holes 6, a pair of connecting bolts 7, and a number of force application holes 8. Their connection relationship and positional relationship are as follows;

[0027] A rotating disk 4 is sleeved outside the positioning rod 1. A fixed disk 5 is coaxially arranged on one side of the rotating disk 4. The axis of the rotating disk 4 matches the shape of the positioning rod 1 and is mutually limited. A pair of arc-shaped holes 6 are provided on the rotating disk 4. A pair of connecting bolts 7 are provided on the pair of arc-shaped holes 6 and penetrate through the pair of arc-shaped holes 6 and are threadedly connected to the fixed disk 5. The fixed disk 5 is of a ring structure and has a width greater than that of the fixed rod at the center. A number of force application holes 8 are arranged in a circumferential array on the arc wall surface of the fixed disk 5;

[0028] In the specific implementation process, the positioning rod 1 passes through the middle of the fixed disk 5 and the rotating disk until the positioning tooling. One side of the fixed disk 5 is fixed on the slewing cylinder to play a fixing role. The rotating disk is relatively fixed to the positioning rod 1 and is provided with an arc-shaped hole 6. Loosening the two connecting bolts 7 on the arc-shaped hole 6 can rotate the movable disk, driving the positioning rod 1 to rotate for angle fine-tuning. If a large angle needs to be adjusted, the fixed disk 5 needs to be rotated. There are force application holes 8 on the circumference of the fixed disk 5. Inserting a force application rod and applying the lever principle can easily rotate it at a large angle. One side of the rotating disk 4 is provided with a limit sleeve coaxial with the rotating disk 4. A fixing bolt 12 is threadedly connected to the limit sleeve and tightly abuts against the outer wall of the positioning rod 1. By rotating and adjusting the fixing bolt 12, the fixing bolt 12 can be disengaged from the limit of the positioning rod 1. After adjusting the position of the positioning rod 1, it can be locked again.

[0029] As a preferred solution, furthermore, semi-connected shrinkage grooves 9 and completely through shrinkage grooves 9 are respectively arranged on both inner arc sides of the fixed disk 5, and the two divide the fixed disk 5 into a form of an annular hoop.

[0030] As a preferred solution, furthermore, a number of scale lines 11 are arranged in an annular array on the circumferential wall surface of the rotating disk 4, which plays a role in facilitating the observation of the rotation angle and improving the operation accuracy.

[0031] As a preferred solution, furthermore, a pair of connecting bolts 7 are internal hexagon bolts and arc-shaped holes 6, which play a role in loosening for fine angle adjustment and fixing and limiting.

[0032] As a preferred solution, furthermore, the angle positioning module 3 is inserted into the through groove of the positioning tooling main body 2, and the movable V-shaped groove 301 penetrates through the end of the angle positioning module 3.

[0033] As a preferred solution, furthermore, a cylindrical groove 202 is opened on the positioning tooling main body 2. The part length positioning core 201 is installed on the axis of the cylindrical groove 202, and a spring 302 is sleeved outside the part length positioning core 201 and connected to the end of the angle positioning module 3. Through the elastic pushing effect of the spring 302, it is ensured that the movable V-shaped groove 301 always clamps and limits the end of the part. Guide posts 303 are arranged on both sides of the angle positioning module 3, and guide chutes matching the guide posts 303 are arranged on the positioning tooling main body 2. The angle positioning module 3 can move back and forth to ensure good contact between the metal part and the movable V-shaped groove 301.

[0034] As a preferred solution, furthermore, the movable rod is changed from rotation to sliding for length adjustment. Its cross-section is a non-circular cross-section positioning rod, not limited to square. The length adjustment lies not in rotation but in sliding. In the example of this case, a square rod is used as an illustrative example. The cross-section of the positioning rod can be triangular, pentagonal, hexagonal, D-shaped, oblate, etc. When using a threaded rod, when adjusting the length by rotating the threaded rod, the angle will change and repositioning is required.

[0035] Generally speaking, for the quick positioning tooling for double - head machining, the movable V - groove can meet the angular positioning and machining of parts with parallel or taper - symmetric planes within a certain range, reducing the types of fixtures and the number of switching times. The length positioning is independent of the angular positioning. Considering that the flat - thick dimensions for angular positioning vary, the spring can expand and contract accordingly to ensure that the length positioning is not affected by the angular positioning. The length - angle positioning tooling can flexibly change the angles and lengths of parts being machined. Compared with the traditional rotation adjustment of threaded rods, the acting mechanisms for length and angle adjustment are relatively separated and do not affect each other. Under the condition of unchanged angular positioning, products of different length specifications can be switched in seconds.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tooling for realizing fast and accurate positioning of angles and lengths in double-head machining, including a positioning rod (1), a positioning tooling main body (2), and an angle positioning module (3). The positioning tooling main body (2) is installed at the end of the positioning rod (1), and the angle positioning module (3) is assembled on the positioning tooling main body (2), characterized in that, A tail positioning mechanism is sleeved on the positioning rod (1); An activity V-shaped groove (301) is formed in the angle positioning module (3), and a part length positioning core (201) is arranged on the positioning tooling main body (2) and penetrates through to the activity V-shaped groove (301); The tail positioning mechanism includes: a rotating disc (4), a fixed disc (5), a pair of arc-shaped holes (6), a pair of connecting bolts (7), and a number of force application holes (8); A rotating disc (4) is sleeved outside the positioning rod (1), a fixed disc (5) is coaxially arranged on one side of the rotating disc (4), the axis of the rotating disc (4) matches the shape of the positioning rod (1) and is mutually limited, a pair of arc-shaped holes (6) are formed in the rotating disc (4), and a pair of connecting bolts (7) are arranged on the pair of arc-shaped holes (6) and penetrate through the pair of arc-shaped holes (6) and are threadedly connected with the fixed disc (5). The fixed disc (5) is of an annular structure and a width larger than that of the fixed rod is formed in the center. A number of force application holes (8) are arranged in an annular array on the arc wall surface of the fixed disc (5). A limiting sleeve coaxial with the rotating disc (4) is arranged on one side of the rotating disc (4), and a fixing bolt (12) is threadedly connected to the limiting sleeve and tightly abuts against the outer wall of the positioning rod (1).

2. The quick and precise positioning angle and length tooling for double-head machining according to claim 1, characterized in that, Semiconnected shrinkage grooves (9) and completely penetrated shrinkage grooves (9) are respectively arranged on both sides of the inner arc of the fixed disc (5).

3. The fixture for realizing rapid and accurate positioning of angles and lengths in double-head machining according to claim 2, characterized in that, A fastening bolt (10) is arranged on the completely penetrated shrinkage groove (9) on one side to connect the two ends of the opposite fixed disc (5).

4. A fixture for quickly and accurately positioning angles and lengths in double-head machining according to claim 3, characterized in that A number of scale lines (11) are arranged in an annular array on the circumferential wall surface of the rotating disc (4).

5. A fixture for quickly and accurately positioning the angle and length in double-head machining according to claim 4, characterized in that, The pair of connecting bolts (7) are internal hexagonal bolts and the width of the end part is larger than the width of the arc-shaped hole (6).

6. The fixture for achieving quick and accurate positioning of angles and lengths in double-head machining according to claim 5, wherein The angle positioning module (3) is inserted into the through groove of the positioning tooling main body (2), and the activity V-shaped groove (301) penetrates through the end part of the angle positioning module (3).

7. A fixture for quickly and accurately positioning the angle and length in double-head machining according to claim 6, characterized in that, A cylindrical groove (202) is formed in the positioning tooling main body (2), the part length positioning core (201) is installed on the axis of the cylindrical groove (202), and a spring (302) is sleeved outside the part length positioning core (201) to connect the end part of the angle positioning module (3).

8. A fixture for quickly and accurately positioning angles and lengths in double-head machining according to claim 7, characterized in that, The cross section of the positioning rod is a non-circular long strip rod-shaped body.

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