Special fixture for milling key groove broach

Abstract

The utility model discloses a special fixture for keyway broach milling, which relates to the technical field of broach fixtures and comprises a broach, a fixing cylinder is arranged at one end of the broach, a fixing block is arranged at the top of the fixing cylinder, a broach groove is formed in one side, close to the broach, of the fixing cylinder, and after the broach is inserted into the fixing cylinder, the broach is fixed through the broach groove. Compared with a traditional face-to-face extrusion limiting mode, a better limiting effect can be achieved, the situation of displacement after limiting is avoided, the stability of the broach in the milling process is ensured, the fixing barrel and the fixing block are connected in a penetrating and inserting mode, disassembly and assembly are easy and rapid, and the machining efficiency is improved. The fixing cylinder and the fixing block can be assembled through a hexagon bolt according to needs, so that the fixing block can be used for limiting the broach in a penetrating mode in the fixing cylinder more stably, although a disassembly and assembly step is added, the whole disassembly and assembly process is still simple and convenient, and the problem that the disassembly and assembly steps of a traditional broach are tedious is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to broach fixture technical field, especially keyway broach milling processing special fixture. BACKGROUND

[0002] Broach is a kind of high-precision, high-efficiency multi-tooth cutter for broaching, its function can be summarized as follows: through the teeth of the multiple rows in turn increasing and changing, metal is cut from workpiece layer by layer to obtain the high-precision processing surface of required size and shape, specifically, broach is often used in batch and mass production, processes round hole, spline hole, keyway, plane and forming surface etc., its cutting process is stable, can avoid the generation of built-up edge, thereby ensuring that the surface roughness of processed workpiece is small, precision is high, simultaneously, since broach is multi-tooth cutter, and the number of simultaneously participating tooth is more, therefore, productivity is also very high.

[0003] The inventor found that the prior art has the following problems in the process of realizing the scheme: the broach is fixed on the horizontal pulling moving mechanism through the fixture, the face-to-face fixture completes the limiting of broach through the extrusion, since the broach milling needs larger pulling force, the fixture is easily caused to move at the limiting position in the process of pulling out the broach to move horizontally, and in serious case, the broach is stuck in the inside of workpiece and is difficult to take out, therefore, the limiting ability of the fixture to broach is poor, and the fixture cannot provide better clamping capacity in milling processing. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide keyway broach milling processing special fixture, which can effectively solve the problems in the background art.

[0005] To achieve the above object, the utility model takes the technical scheme that:

[0006] Keyway broach milling processing special fixture, including broach, the one end of broach is equipped with fixed cylinder, the top of fixed cylinder is equipped with fixed block, the side of fixed cylinder close to broach is opened and dug with cutter groove, the inside top of cutter groove middle part is opened and dug with top groove, the top of fixed cylinder located outside cutter groove is opened and dug with installation groove, the inside of installation groove is penetrated and inserted with hexagonal bolt, the bottom of fixed block is fixed with fitting block, the front side of top groove located installation groove position is opened and dug with screw groove, the one end of broach close to fixed cylinder is opened and dug with fitting groove, the inside of fitting groove is opened and dug with positioning hole, the bottom of fitting block located positioning hole position is fixed with positioning rod, the one end of broach located fitting groove is inserted in the inside of fitting groove, the inside of top groove is inserted with top block, the inside of fitting groove is inserted with fitting block, the inside of positioning hole is inserted with positioning rod.

[0007] Preferably, the fixed cylinder is fixed with a flange plate at one end away from the drawbench.

[0008] Preferably, the outer size of the top block matches the inner size of the mounting groove, the outer size of the engaging block matches the inner size of the engaging groove, the outer diameter size of the positioning hole matches the inner diameter size of the positioning hole.

[0009] Preferably, guide grooves are dug at both ends of the bottom of the drawbench inserted into the inner end of the tool groove, and guide blocks are fixed at both ends of the inner bottom of the tool groove and are respectively inserted into the inner part of the guide groove and are in sliding connection with the guide groove.

[0010] Preferably, a through cavity is dug at the side wall of the outer end of the engaging block.

[0011] Preferably, the hexagonal bolt is inserted into the inner part of the threaded groove at one end of the mounting groove and is in threaded connection with the threaded groove.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. After the drawbench is inserted into the inner part of the fixed cylinder, the fixed block is inserted into the fixed cylinder and limits the drawbench, compared with the traditional face-to-face extrusion limiting mode, better limiting effect can be achieved, and displacement does not occur after limiting, and the stability in drawbench milling processing is ensured.

[0014] 2. The fixed cylinder and the fixed block are in penetrating connection, and are simple and fast to disassemble and assemble, and the fixed cylinder and the fixed block can be assembled through the hexagonal bolt according to needs, so that the fixed block can be more stably penetrated and limited in the fixed cylinder to limit the drawbench, although one disassembly and assembly step is increased, the overall disassembly and assembly process is still simple and convenient, and the problem that the traditional drawbench is complicated to disassemble and assemble is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the utility model keyway drawbench milling processing special fixture;

[0016] Figure 2 It is a drawbench structure schematic view of the utility model keyway drawbench milling processing special fixture;

[0017] Figure 3 It is a separation structure schematic view of the fixed cylinder and the fixed block of the utility model keyway drawbench milling processing special fixture;

[0018] Figure 4 It is a separation structure schematic view of the fixed cylinder and the fixed block of the utility model keyway drawbench milling processing special fixture after being cut open.

[0019] MARKS OF THE DRAWINGS:

[0020] 1. Broach; 11. Fitting groove; 12. Positioning hole; 13. Guide groove; 2. Fixing cylinder; 21. Knife groove; 22. Top groove; 23. Mounting groove; 24. Guide block; 3. Flange plate; 4. Fixing block; 41. Top block; 42. Fitting block; 43. Positioning rod; 44. Threaded groove; 45. Through-hole; 5. Hexagonal bolt. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1-4 As shown, a special fixture for keyway broach milling includes a broach 1, a fixed cylinder 2 is provided at one end of the broach 1, a fixed block 4 is provided on the top of the fixed cylinder 2, a knife groove 21 is chiseled on the side of the fixed cylinder 2 close to the broach 1, a top groove 22 is chiseled on the inner top of the middle of the knife groove 21, a mounting groove 23 is chiseled on the upper side of the fixed cylinder 2 located above the outer end of the knife groove 21, a hexagonal bolt 5 is inserted through the interior of the mounting groove 23, the fixed block 4 includes a top block 41, a fitting block 42 is fixed on the bottom of the top block 41, and the top block 4 A threaded groove 44 is carved on the front side of the mounting groove 23, a fitting groove 11 is carved on the end of the broach 1 close to the fixed cylinder 2, a positioning hole 12 is carved inside the fitting groove 11, a positioning rod 43 is fixed to the bottom of the fitting block 42 located at the position of the positioning hole 12, one end of the broach 1 located in the fitting groove 11 is inserted into the fitting groove 11, the top block 41 is inserted into the top groove 22, the fitting block 42 is inserted into the fitting groove 11, and the positioning rod 43 is inserted into the positioning hole 12.

[0023] Specifically, a flange plate 3 is fixed to one end of the fixed cylinder 2 away from the broach 1 , and the flange plate 3 can be mounted on the base of the transverse movement mechanism by means of bolts.

[0024] Specifically, the outer dimensions of the top block 41 match the inner dimensions of the mounting groove 23, the outer dimensions of the fitting block 42 match the inner dimensions of the fitting groove 11, the outer dimensions of the fitting groove 11 match the inner dimensions of the tool groove 21, and the outer diameter of the positioning hole 12 matches the inner diameter of the positioning hole 12, thereby completing the double interpenetrating limiting of the broach 1.

[0025] Specifically, guide grooves 13 are carved at both ends of the bottom of one end of the broach 1 inserted into the knife groove 21, and guide blocks 24 are fixed at both ends of the bottom of the knife groove 21. The guide blocks 24 are respectively inserted into the guide grooves 13 and slidably connected thereto. The guide blocks 24 inserted into the guide grooves 13 not only play a guiding role, but also have an anti-twisting effect when the broach 1 moves.

[0026] Specifically, the top block 41 is located at the side wall of the one end of the fitting block 42 and is drilled with a through cavity 45, which is convenient for taking the top block 41.

[0027] Specifically, the hexagonal bolt 5 is inserted into the inside of the threaded groove 44 through one end of the mounting groove 23 and is threadedly connected with the threaded groove 44, so that the fixing block 4 is completely limited in the fixing cylinder 2, and the broach 1 is stably limited in the blade groove 21.

[0028] Working principle: the broach 1 is inserted into the inside of the blade groove 21 at one end of the fitting groove 11, the guide block 24 is inserted into the guide groove 13, which not only plays a guiding role, but also plays a anti-twist effect when the broach 1 moves, the top block 41 is inserted into the inside of the mounting groove 23, and the fitting block 42 at the bottom of the top block 41 is inserted into the inside of the fitting groove 11, and the positioning rod 43 at the bottom of the fitting block 42 is inserted into the positioning hole 12 on the fitting groove 11, so that double limiting is completed, the hexagonal bolt 5 is inserted into the mounting groove 23 and is threadedly connected with the threaded groove 44, so that the fixing block 4 is completely limited in the fixing cylinder 2, and the broach 1 is stably limited in the blade groove 21.

[0029] The circuit, electronic components and control module are all prior art, and those skilled in the art can realize them without further description, and the content protected by the utility model does not involve improvement of software and method.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model, and the utility model can have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A special fixture for keyway broach milling, comprising a broach (1), characterized in that The broach (1) is provided with a fixing tube (2) at one end, a fixing block (4) is provided at the top of the fixing tube (2), a knife groove (21) is chiseled on the side of the fixing tube (2) close to the broach (1), a top groove (22) is chiseled at the top of the inner top of the middle of the knife groove (21), a mounting groove (23) is chiseled above the outer end of the knife groove (21) of the fixing tube (2), a hexagonal bolt (5) is inserted through the interior of the mounting groove (23), the fixing block (4) includes a top block (41), a fitting block (42) is fixed at the bottom of the top block (41), and the top block (41) is located in the mounting groove (2 3) A threaded groove (44) is chiseled on the front side of the position, a fitting groove (11) is chiseled on one end of the broach (1) close to the fixed cylinder (2), a positioning hole (12) is chiseled inside the fitting groove (11), a positioning rod (43) is fixed at the bottom of the fitting block (42) located at the position of the positioning hole (12), one end of the broach (1) located at the fitting groove (11) is inserted into the fitting groove (11), the top block (41) is inserted into the top groove (22), the fitting block (42) is inserted into the fitting groove (11), and the positioning rod (43) is inserted into the positioning hole (12).

2. The special fixture for keyway broach milling machining according to claim 1, characterized in that A flange plate (3) is fixed to one end of the fixing cylinder (2) away from the broach (1).

3. The special fixture for keyway broach machining according to claim 1, characterized in that The outer dimensions of the top block (41) match the inner dimensions of the mounting groove (23), the outer dimensions of the fitting block (42) match the inner dimensions of the fitting groove (11), the outer dimensions of the fitting groove (11) match the inner dimensions of the knife groove (21), and the outer diameter of the positioning hole (12) matches the inner diameter of the positioning hole (12).

4. The special fixture for keyway broach machining according to claim 1, characterized in that The bottom of one end of the broach (1) inserted into the knife groove (21) is provided with guide grooves (13) at both ends, and the bottom of the knife groove (21) is fixed with guide blocks (24) at both ends. The guide blocks (24) are respectively inserted into the guide groove (13) and slidably connected thereto.

5. The special fixture for keyway broach machining according to claim 1, characterized in that The top block (41) is provided with a through cavity (45) on the side wall at one end outside the fitting block (42).

6. The special fixture for keyway broach machining according to claim 1, characterized in that One end of the hexagonal bolt (5) passes through the mounting groove (23) and is inserted into the interior of the thread groove (44) and is threadedly connected thereto.

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