Special fixture for square broach machining

Abstract

The special fixture for square broach machining comprises a fixed bottom plate, a fixed clamping seat, a movable clamping seat and a locking mechanism, the fixed clamping seat and the movable clamping seat are sequentially arranged on the surface of the fixed bottom plate from left to right, and guide sliding grooves which are symmetrically distributed are formed in the surface of the fixed bottom plate; positioning holes evenly distributed along the guide sliding grooves are formed between the guide sliding grooves, the bottom of the fixed clamping base is fixedly connected with a first sliding plate, the bottoms of the movable clamping bases are fixedly connected with a second sliding plate, the number of the movable clamping bases is two, the two movable clamping bases are symmetrically distributed at the two ends of the second sliding plate, and the locking mechanism is located between the movable clamping bases and fixedly connected with the second sliding plate. And a rotationally connected connecting rod is arranged between the locking mechanism and the movable clamping seat. The oval clamping plate is arranged on the surface of the movable clamping base and matched with the clamping blocks detachably connected with the surface, square broaches with different widths can be conveniently and automatically clamped when the clamping plate is rotated, the clamping blocks with different thicknesses can be replaced, and the convenience of fixing the square broaches is improved.

Description

Technical Field

[0001] The invention relates to the technical field of broach processing equipment, in particular to a special fixture for processing square broaches. Background Art

[0002] A broach is a forming tool used for broaching. There are multiple rows of teeth on the surface of the tool, and the size and shape of each row of teeth increase and change from the cutting end to the cutting end. When the broach is broaching, each tooth cuts a certain thickness of metal from the workpiece, and finally obtains the required size and shape. Broaches are often used in batch and mass production to process round holes, spline holes, keyways, planes and forming surfaces, etc., with high productivity. According to the different parts of the processing surface, broaches are divided into internal broaches and external broaches; according to the different force modes during work, they are divided into broaches and pusher tools. Pusher tools are often used to calibrate the molded holes after heat treatment.

[0003] A fixture is a clamp. A fixture is a device used to fix the processing object in the mechanical manufacturing process so that it occupies the correct position for construction or testing. Any device used to quickly, conveniently and safely install the workpiece in any process can be called a fixture.

[0004] At present, when processing the blade on the surface of a square broach, it is usually necessary to use a fixed fixture to fix the broach body to improve the stability of the broach body surface processing. However, the existing fixtures mostly use a screw to push the clamping plate for clamping. Due to the different processing requirements of each broach, it has different shapes, which makes it difficult for the clamping plate type fixture to adapt to a variety of broaches of different specifications. It is easy to have unstable clamping, which affects the stability of square broach processing. For this reason, a special fixture for square broach processing is proposed. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the shortcomings of the prior art, the present invention provides a special fixture for processing square broaches, which solves the problem that the clamping plate fixture has insufficient versatility and stability in clamping broaches of different sizes and specifications.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a special fixture for square broach processing, comprising a fixed base plate, a fixed clamp seat, a movable clamp seat and a locking mechanism, the surface of the fixed base plate is provided with a fixed clamp seat and a movable clamp seat from left to right in sequence, the surface of the fixed base plate is provided with symmetrically distributed guide grooves, and positioning holes evenly distributed along the guide grooves are provided between the guide grooves, the bottom of the fixed clamp seat is fixedly connected to a sliding plate 1, the bottom of the movable clamp seat is fixedly connected to a sliding plate 2, the movable clamp seat includes two and symmetrically distributed at both ends of the sliding plate 2, the locking mechanism is located between the movable clamp seats and fixedly connected to the sliding plate 2, and a connecting rod rotatably connected is provided between the locking mechanism and the movable clamp seat.

[0009] As a further preferred embodiment of the present invention, the fixed clamp seat includes a fixed plate, a front pressure plate and a fine-tuning bolt. The fixed plate is L-shaped and fixedly connected to a sliding plate. The surface of the fixed plate is provided with a threaded fine-tuning bolt. The front pressure plate is located on the inner side wall of the fixed plate and is distributed parallel to the fixed plate. The inner end of the fine-tuning bolt is rotatably connected to the front pressure plate.

[0010] As a further preferred embodiment of the present invention, the movable clamp seat includes a rotating base, a central axis, a clamp and a pin. The surface of the rotating base is fixedly connected with a vertically distributed central axis. The clamp is located on the surface of the rotating base and is rotatably connected to the central axis. The upper surface of the clamp is provided with a threaded pin, and the upper end of the pin is rotatably connected to the outer end of the connecting rod.

[0011] As a further preferred embodiment of the present invention, the clamping plates are distributed in an elliptical shape, and a stepped groove is provided at the edge of the clamping plates, and a detachably connected clamping block is provided on the surface of the stepped groove.

[0012] As a further preferred embodiment of the present invention, a connection hole is provided on the surface of the stepped groove, and a through hole is provided on the surface of the clamping block.

[0013] As a further preferred embodiment of the present invention, the locking mechanism includes a locking base, a locking slider, a locking screw and a crank. A dovetail groove is provided on the surface of the locking base. The locking slider is located on the surface of the locking base and is slidably connected to the dovetail groove. The locking screw passes through the side wall of the locking base and is connected to the locking slider. The outer end of the locking screw is fixedly connected to the crank.

[0014] As a further preferred embodiment of the present invention, a threaded hole is provided at the center of the surface of the locking slider, the locking screw passes through the threaded hole and is rotatably connected to the threaded hole, and open grooves are respectively provided on both side walls of the locking slider, the open grooves are rotatably connected to the inner end of the connecting rod, and a connecting pin for plug-in connection is provided on the surface of the open groove.

[0015] As a further preferred embodiment of the present invention, the surfaces of the sliding plate 1 and the sliding plate 2 are both provided with plug-in holes, and the insides of the plug-in holes are provided with positioning pins for plug-in connection.

[0016] (III) Beneficial effects

[0017] The present invention provides a special fixture for processing square broaches, which has the following beneficial effects:

[0018] 1. The present invention provides a fixed clamp seat, a movable clamp seat and a locking mechanism on the surface of the fixed base plate, so as to conveniently, quickly and stably clamp and fix the square broach, thereby improving the convenience of processing the square broach. Two movable clamp seats and one fixed clamp seat form a three-point fixing structure, thereby improving the stability of the fixed connection of the square broach.

[0019] 2. The present invention provides an elliptical clamping plate on the surface of the movable clamping seat, which cooperates with a clamping block detachably connected to the surface, so that square broaches of different widths can be automatically clamped when the clamping plate is rotated, and clamping blocks of different sizes can be replaced according to the thickness of the square broach, thereby improving the convenience of fixing the square broach.

[0020] 3. The present invention provides a rotatably connected connecting rod between the locking slider and the clamping plate, which facilitates the clamping plate to rotate synchronously when the locking screw is rotated, and is convenient for the clamping plate to be quickly clamped with the side wall of the square broach, and can maintain the clamping force to avoid loosening during processing and improve the stability of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the special fixture for processing square broaches of the present invention;

[0022] Figure 2 It is a schematic diagram of the side view of the special fixture for processing square broaches of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the fixed clamp seat of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the movable clamping seat of the present invention;

[0025] Figure 5 It is a schematic diagram of the locking mechanism structure of the present invention.

[0026] In the figure: fixed base plate -1, fixed clamp seat -2, movable clamp seat -3, locking mechanism -4, guide slide groove -5, positioning hole -6, sliding plate one -7, sliding plate two -8, connecting rod -9, fixed plate -10, front pressure plate -11, fine-tuning bolt -12, rotating base -13, central axis -14, clamp plate -15, pin shaft -16, stepped groove -17, clamp block -18, connecting hole -18, through hole -19, locking base -20, locking slider -21, locking screw -22, crank -23, dovetail groove -24, threaded hole -25, opening groove -26, connecting pin -27, plug hole -28, positioning pin -29. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-5 The embodiment of the present invention provides a technical solution: a special fixture for square broach processing, comprising a fixed base plate 1, a fixed clamp seat 2, a movable clamp seat 3 and a locking mechanism 4. The surface of the fixed base plate 1 is provided with a fixed clamp seat 2 and a movable clamp seat 3 from left to right in sequence. The surface of the fixed base plate 1 is provided with symmetrically distributed guide grooves 5, and positioning holes 6 evenly distributed along the guide grooves 5 are provided between the guide grooves 5. The bottom of the fixed clamp seat 2 is fixedly connected to a sliding plate 1 7, and the bottom of the movable clamp seat 3 is fixedly connected to a sliding plate 2 8. The movable clamp seat 3 includes two and symmetrically distributed at both ends of the sliding plate 2 8. The locking mechanism 4 is located between the movable clamp seats 3 and fixedly connected to the sliding plate 2 8. A connecting rod 9 rotatably connected is provided between the locking mechanism 4 and the movable clamp seat 3.

[0029] Further improved, the fixed clamp seat 2 includes a fixed plate 10, a front pressure plate 11 and a fine-tuning bolt 12. The fixed plate 10 is L-shaped and fixedly connected to the sliding plate 7. The surface of the fixed plate 10 is provided with a threaded fine-tuning bolt 12. The front pressure plate 11 is located on the inner side wall of the fixed plate 10 and is distributed parallel to the fixed plate 10. The inner end of the fine-tuning bolt 12 is rotatably connected to the front pressure plate 11. By providing a threaded fine-tuning bolt 12 on the surface of the fixed plate 10, it is convenient to adjust the position of the front pressure plate 11, and it is convenient to cooperate with the movable clamp seat 3 to fix square broaches of different sizes.

[0030] Further improved, the movable clamping seat 3 includes a rotating base 13, a center axis 14, a clamping plate 15 and a pin 16. The surface of the rotating base 13 is fixedly connected with the vertically distributed center axis 14. The clamping plate 15 is located on the surface of the rotating base 13 and is rotatably connected to the center axis 14. The upper surface of the clamping plate 15 is provided with a threaded pin 16. The upper end of the pin 16 is rotatably connected to the outer end of the connecting rod 9. By fixing the vertically distributed center axis 14 on the surface of the rotating base 13 and cooperating with the pin 16 on the top of the clamping plate 15, it is convenient for the clamping plate 15 to rotate along the center axis 14 driven by the connecting rod 9, so as to facilitate the clamping and fixing of the square broach.

[0031] As a further improvement, the clamp 15 is distributed in an elliptical shape, and a stepped groove 17 is provided at the edge of the clamp 15. A detachably connected clamp block 18 is provided on the surface of the stepped groove 17. By adopting the elliptical clamp 15 design, it is convenient to automatically clamp the square broach when the clamp 15 rotates, thereby improving the convenience of using the fixture. With the detachably connected clamp block 18, it is convenient to adjust the contact area of ​​the clamp 15 according to square broaches of different thicknesses, thereby improving the versatility of use.

[0032] As a further improvement, a connecting hole 18 is provided on the surface of the step groove 17, and a through hole 19 is provided on the surface of the clamping block 18. By providing the connecting hole 18 on the surface of the step groove 17 and cooperating with the through hole 19 on the surface of the clamping block 18, it is convenient to use a screw to fix the clamping block 18 on the surface of the step groove 17, and it is convenient to select clamping blocks 18 of different thicknesses according to the thickness of the square broach, thereby improving the stability and versatility of the square broach clamping.

[0033] Further improved, the locking mechanism 4 includes a locking base 20, a locking slider 21, a locking screw 22 and a crank 23. A dovetail groove 24 is provided on the surface of the locking base 20. The locking slider 21 is located on the surface of the locking base 20 and is slidably connected to the dovetail groove 24. The locking screw 22 passes through the side wall of the locking base 20 and is connected to the locking slider 21. The outer end of the locking screw 22 is fixedly connected to the crank 23. By providing a slidingly connected locking slider 21 on the surface of the locking base 20 and cooperating with the rotatably connected locking screw 22, it is convenient to push the locking slider 21 to move by rotating the locking screw 22, so as to cooperate with the movable clamp 3 for movement.

[0034] As a further improvement, a threaded hole 25 is provided at the center of the surface of the locking slider 21, and the locking screw 22 passes through the threaded hole 25 and is rotatably connected to the threaded hole 25. Open grooves 26 are provided on both side walls of the locking slider 21, and the open grooves 26 are rotatably connected to the inner end of the connecting rod 9. A connecting pin 27 for plug-in connection is provided on the surface of the open groove 26. By providing a threaded hole 25 in the middle part of the locking slider 21, it is convenient to cooperate with the locking screw 22 to drive the locking slider 21. By providing open grooves 26 with connecting pins 27 on both sides of the locking slider 21, it is convenient to rotatably connect with the connecting rod 9, so as to push the connecting rods 9 on both sides to move synchronously.

[0035] Specifically, the surfaces of sliding plate 1 7 and sliding plate 2 8 are provided with plug-in holes 28, and the interior of the plug-in holes 28 is provided with plug-in positioning pins 29. By providing plug-in positioning pins 29 on the surfaces of sliding plate 1 7 and sliding plate 2 8, it is convenient to cooperate with the positioning holes 6 on the surface of the fixed base plate 1 for limited fixing.

[0036] The present invention adjusts the position of the front pressure plate 11 by rotating the fine-tuning bolt 12 when in use, selects clamping blocks 18 of different thicknesses according to the thickness of the square broach to be clamped, fixes the clamping blocks 18 on the surface of the step groove 17 by bolts, puts the square broach between the fixed clamp seat 2 and the movable clamp seat 3, manually rotates the locking screw to push the locking slider backward, thereby using the connecting rod 9 to pull the clamp plate 15 to rotate, and uses the clamping block 18 at the edge of the clamp plate 15 to clamp and fix the square broach, which makes the operation more convenient and quick, thereby improving the convenience of use.

[0037] Problem to be solved by the present invention: Most existing clamps use a screw to push a clamping plate for clamping. Since each broach has different shapes due to different processing requirements, the clamping plate clamp is difficult to adapt to broaches of various specifications, and is prone to unstable clamping, which affects the stability of square broach processing. The present invention provides a fixed clamping seat 2, a movable clamping seat 3 and a locking mechanism 4 on the surface of a fixed base plate 1, so that the square broach can be clamped and fixed quickly and stably, thereby improving the convenience of processing the square broach. Two movable clamping seats 3 and a fixed clamping seat 2 are used to form a three-point fixing structure, thereby improving the stability of the fixed connection of the square broach. The present invention provides a fixed clamping seat 2, a movable clamping seat 3 and a locking mechanism 4 on the surface of a fixed base plate 1, so that the square broach can be clamped and fixed quickly and stably, thereby improving the convenience of processing the square broach. Two movable clamping seats 3 and a fixed clamping seat 2 are used to form a three-point fixing structure, thereby improving the stability of the fixed connection of the square broach.

[0038] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships 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.

[0039] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0040] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A special fixture for processing square broaches, comprising a fixed base plate (1), a fixed clamping seat (2), a movable clamping seat (3) and a locking mechanism (4), characterized in that: The surface of the fixed base plate (1) is provided with a fixed clamp seat (2) and a movable clamp seat (3) from left to right, the surface of the fixed base plate (1) is provided with symmetrically distributed guide grooves (5), and positioning holes (6) evenly distributed along the guide grooves (5) are provided between the guide grooves (5). The bottom of the fixed clamp seat (2) is fixedly connected to a sliding plate 1 (7), and the bottom of the movable clamp seat (3) is fixedly connected to a sliding plate 2 (8). The movable clamp seat (3) includes two and symmetrically distributed at both ends of the sliding plate 2 (8). The locking mechanism (4) is located between the movable clamp seats (3) and is fixedly connected to the sliding plate 2 (8). A connecting rod (9) rotatably connected is provided between the locking mechanism (4) and the movable clamp seat (3).

2. A special fixture for processing square broaches according to claim 1, characterized in that: The fixed clamp seat (2) comprises a fixed plate (10), a front pressure plate (11) and a fine-tuning bolt (12); the fixed plate (10) is L-shaped and fixedly connected to the sliding plate (7); a threaded fine-tuning bolt (12) is provided on the surface of the fixed plate (10); the front pressure plate (11) is located on the inner side wall of the fixed plate (10) and is distributed parallel to the fixed plate (10); the inner end of the fine-tuning bolt (12) is rotatably connected to the front pressure plate (11).

3. A special fixture for processing square broaches according to claim 1, characterized in that: The movable clamping seat (3) comprises a rotating base (13), a central axis (14), a clamping plate (15) and a pin (16); the surface of the rotating base (13) is fixedly connected with a vertically distributed central axis (14); the clamping plate (15) is located on the surface of the rotating base (13) and is rotatably connected with the central axis (14); the upper surface of the clamping plate (15) is provided with a threaded pin (16); the upper end of the pin (16) is rotatably connected with the outer end of the connecting rod (9).

4. A special fixture for processing square broaches according to claim 3, characterized in that: The clamping plate (15) is distributed in an elliptical shape, and a stepped groove (17) is provided at the edge of the clamping plate (15). A detachably connected clamping block (18) is provided on the surface of the stepped groove (17).

5. A special fixture for processing square broaches according to claim 4, characterized in that: A connection hole (18) is provided on the surface of the stepped groove (17), and a through hole (19) is provided on the surface of the clamping block (18).

6. The special fixture for square broach processing according to claim 1, characterized in that: The locking mechanism (4) comprises a locking base (20), a locking slider (21), a locking screw (22) and a crank (23); a dovetail groove (24) is provided on the surface of the locking base (20); the locking slider (21) is located on the surface of the locking base (20) and is slidably connected to the dovetail groove (24); the locking screw (22) passes through the side wall of the locking base (20) and is connected to the locking slider (21); and the outer end of the locking screw (22) is fixedly connected to the crank (23).

7. A special fixture for processing square broaches according to claim 6, characterized in that: A threaded hole (25) is provided at the center of the surface of the locking slider (21), the locking screw rod (22) passes through the threaded hole (25) and is rotatably connected to the threaded hole (25), and opening grooves (26) are respectively provided on the two side walls of the locking slider (21), the opening grooves (26) are rotatably connected to the inner end of the connecting rod (9), and a connecting pin (27) for plug-in connection is provided on the surface of the opening groove (26).

8. The special fixture for processing square broaches according to claim 1, characterized in that: The surfaces of the sliding plate 1 (7) and the sliding plate 2 (8) are both provided with plug-in holes (28), and the insides of the plug-in holes (28) are provided with positioning pins (29) for plug-in connection.

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