A cylindrical broaching precision cutter cylinder with coarse and fine separation

Abstract

The present application belongs to the field of mechanical equipment technology, and particularly relates to a cylindrical precision broaching tool cylinder with separate coarse and fine parts, comprising a coarse tool outer cylinder, a fine tool outer cylinder, 14 small tool sleeves, a fine tool cylinder sleeve, a positioning plate, an upper end cover, a lower base, an upper end cover of the coarse tool cylinder, a fine tool cylinder base, upper, middle and lower centering sleeves, a support ring, an inner support ring sleeve, a workpiece tensioning device and a tool. The coarse tool outer cylinder is transitionally matched with the 14 small tool sleeves and is positioned and fixed with 14 tapered pins. The positioning plate is connected to the machine tool with positioning pins to ensure the perpendicularity of the axial direction of the entire tool cylinder to the bottom machine tool mounting surface. The inner support ring sleeve is concentric with the lower centering sleeve, coaxial with the support ring and connected with screws to ensure the coaxiality of the entire broaching device and the propeller support rod; the lower base is fixed to the machine tool with a machine tool pressure block mechanism; the workpiece tensioning device contacts the inner diameter of the workpiece to fix the workpiece; the tool comprises a coarse tool strip, a fine tool and a fine tool ring.

Description

Technical field:

[0001] The present application belongs to the technical field of mechanical equipment, and in particular relates to a coarse and fine separation barrel-type precision broaching tool barrel. Background technology:

[0002] Synchronizers are crucial components of transmissions, and the spline hub is a key part within them. Therefore, high dimensional accuracy and surface finish are required. The common method for machining the external splines and keyways of spline hubs is a two-step process: first rolling the external splines, then drawing the keyways. This method is inefficient, results in unstable workpiece dimensions, and cannot roll external splines with several irregularly shaped teeth.

[0003] In order to solve the above problems, the present application provides a cylindrical broaching precision tool cylinder with coarse and fine separations that can process external splines and external circular keyways simultaneously, thereby improving processing efficiency, maintaining dimensional stability, and improving dimensional accuracy. Summary of the invention:

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present application is as follows: a rough and fine separated cylindrical broaching precision tool cylinder, comprising a roughing tool outer cylinder, a fine tool outer cylinder, 14 small tool sleeves, a fine tool cylinder tool sleeve, a positioning plate, an upper end cover, a lower base, an upper end cover of the roughing tool cylinder, a fine tool cylinder base, upper, middle and lower centering sleeves, a support ring, an inner sleeve of the support ring, a workpiece tensioning device and a tool. The roughing tool outer cylinder is transitionally matched with the 14 small tool sleeves and is positioned and fixed with 14 tapered pins. The positioning plate is connected to the upper end cover with screws; the positioning plate is connected to the positioning pins used for the machine tool to ensure the verticality of the axial direction of the entire tool cylinder and the bottom machine tool mounting surface. The fine tool outer cylinder is transitionally matched with the fine tool cylinder tool sleeve, positioned with a positioning key and connected with screws; the fine tool outer cylinder and the fine tool cylinder base are positioned with a positioning key and connected with screws; the fine tool cylinder base and the roughing tool cylinder upper end cover are positioned with a key and connected with screws. The roughing knife outer cylinder and the upper end cover of the roughing knife cylinder are positioned with a positioning key and connected with screws; the roughing knife outer cylinder and the lower base are positioned with a key and connected with screws. The upper, middle and lower centering sleeves are connected with the upper end cover, the upper end cover of the roughing knife cylinder, and the lower base with screws; the support ring inner sleeve is concentric with the lower centering sleeve and coaxial with the support ring and connected with screws to ensure the coaxiality of the entire broaching device and the propeller support rod; the lower base and the support ring are positioned with a positioning key and connected with screws; the support ring and the machine tool are positioned with a positioning key, and the lower base and the machine tool are fixed with a machine tool pressure block mechanism; the workpiece tensioning device contacts the inner diameter of the workpiece and is used to fix the workpiece; the tool includes a roughing knife bar, a fine knife, and a fine knife ring.

[0005] Furthermore, the base of the fine knife cylinder and the upper end cover of the rough knife cylinder are positioned with positioning keys and positioning pins, which facilitates the adjustment of the positional relationship between the base of the fine knife cylinder and the upper end cover of the rough knife cylinder.

[0006] Furthermore, the upper, middle and lower centering sleeves are connected to the upper end cover, the upper end cover of the rough cutter cylinder and the lower base with screws to ensure the coaxiality of the propeller and the small cutter sleeve when there is no guide bar to guide during the broaching process.

[0007] Furthermore, n guide strips are installed on the inner splines of the 14 small tool sleeves in a front-to-back staggered manner to support the propeller on the circumference and ensure the coaxiality of the propeller and the small tool sleeve during the broaching process.

[0008] Furthermore, on the inner splines of the 14 small tool sleeves, n rough tool strips are staggered front and back to avoid the guide strips, which reduces the number of rough tool strips involved in broaching at the same time, reduces the broaching force, and avoids the phenomenon of pulling failure and chip jamming.

[0009] Furthermore, the fine knife is installed on the keyway of the inner wall of the fine knife cylinder sleeve and connected with screws. The fine knife cylinder sleeve and the fine knife ring are positioned with positioning keys to ensure the positional relationship between the fine knife and the fine knife ring.

[0010] Furthermore, the fine knife ring is transitionally matched with the fine knife outer cylinder, is positioned with a positioning key, is pressed tightly with the fine knife cylinder base through the upper end cover, and is fixed in the fine knife outer cylinder.

[0011] Compared with the prior art, the beneficial effects are as follows:

[0012] 1. The structural design of this application is reasonable, and the processing of external splines and external keyways can be completed in one broaching, and external splines with several special-shaped teeth can be processed.

[0013] 2. The coarse blades of the present application are staggeredly installed front and back, which reduces the number of coarse blades involved in broaching at the same time, reduces the broaching force, and avoids the phenomenon of being unable to pull and chip jamming.

[0014] 3. This application adopts a coarse and fine split design, which reduces the total length of the coarse knife outer cylinder, reduces the manufacturing difficulty, facilitates the adjustment of the relative position of the coarse knife strip, the fine knife and the fine knife ring, and reduces the adjustment difficulty.

[0015] 4. This application uses a precision knife ring to draw the external spline to improve dimensional accuracy and dimensional stability. Description of the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of this application;

[0017] Figure 2 This is a partial front view of this application;

[0018] Figure 3 This is a partial cross-sectional view of this application.

[0019] Figure 4 This is the layout diagram of the rough knife strips of this application.

[0020] Figure 5This is the layout diagram of the fine knife and fine knife ring of this application.

[0021] Marking Description:

[0022] 1- positioning plate, 110- positioning pin machine tool; 2- workpiece tensioning device, 210- pusher; 3- upper end cover, 310- upper centering sleeve; 4- fine knife outer cylinder, 410- fine knife cylinder positioning long key, 411- knife ring positioning key, 412- fine knife cylinder knife sleeve, 413- fine knife, 414- fine knife ring; 5- fine knife cylinder base, 510- positioning pin- fine knife cylinder base, 511- positioning key- fine knife cylinder base; 6- rough knife cylinder upper end cover, 610- positioning key- rough knife cylinder upper end cover, 611- middle centering sleeve; 7- rough knife outer cylinder, 710- taper pin, 711- rough knife strip, 712- guide strip, 713- small knife sleeve; 8- lower base, 810- positioning key- lower base, 811- lower centering sleeve; 9- support ring, 910- positioning key- machine tool, 911- support ring inner sleeve. Specific implementation method:

[0023] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0024] On the contrary, this application covers any alternatives, modifications, equivalents, and solutions made within the spirit and scope of this application as defined by the claims. Furthermore, to facilitate a better understanding of this application, certain specific details are described in detail below in the detailed description of this application. Those skilled in the art will be able to fully understand this application without these details.

[0025] like Figure 1-5As shown, in an embodiment of the present application, a rough and fine separated cylindrical broaching precision tool cylinder, the rough tool outer cylinder 7 is transitionally matched with 14 small tool sleeves 713, and is positioned and fixed with 14 taper pins 710; the positioning plate 1 is connected to the upper end cover 3 with screws; the positioning plate 1 is connected to the machine tool with a positioning pin-machine tool 110 to ensure the verticality of the entire tool cylinder axial direction and the bottom machine tool mounting surface; the fine tool outer cylinder 4 is transitionally matched with the fine tool cylinder tool sleeve 412, and is positioned with the fine tool cylinder positioning long key 410 and the tool ring positioning key 411, and is screwed; the fine tool outer cylinder 4 and the fine tool cylinder base 5 are positioned with the fine tool cylinder positioning long key 410 and the tool ring positioning key 411, and are screwed; the fine tool cylinder base 5 and the rough tool cylinder upper end cover 3 are positioned with a key positioning-fine tool cylinder base 511 and a positioning pin-fine tool cylinder base 510, and are screwed; the rough tool outer cylinder 7 and the rough tool cylinder upper end cover 6 is positioned with a positioning key - the upper end cover 610 of the roughing knife cylinder and connected with screws; the roughing knife outer cylinder 7 and the lower base 8 are positioned with a key - the lower base 810 and connected with screws; the upper centering sleeve 310 and the upper end cover 3, the middle centering sleeve 611 and the upper end cover 6 of the roughing knife cylinder, the lower centering sleeve 811 and the lower base 8 are connected with screws; the support ring inner sleeve 911 is concentric with the lower centering sleeve 811, coaxial with the support ring 9 and connected with screws to ensure the coaxiality of the entire broaching device and the thruster support rod; the lower base 8 and the support ring 9 are positioned with a positioning key - the machine tool 910 and connected with screws; the support ring 9 and the machine tool are positioned with a positioning key - the machine tool 910, and the lower base 8 and the machine tool are fixed with a machine tool pressing mechanism; the workpiece tensioning device 2 is in contact with the inner diameter of the workpiece and is used to fix the workpiece; the tool includes a roughing knife strip 711, a fine knife 413 and a fine knife ring 414.

[0026] On the inner splines of the 14 small tool sleeves 713, n guide strips 712 are staggered front and back to support the propeller 210 on the circumference to ensure the coaxiality of the propeller 210 and the small tool sleeve 713 during the broaching process; on the inner splines of the 14 small tool sleeves 713, n rough blade strips 711 are staggered front and back to avoid the guide strips 712, which reduces the number of rough blade strips 711 involved in broaching at the same time, reduces the broaching force, and avoids the phenomenon of being unable to pull and chip jamming; the fine knife 4 13 is installed on the keyway of the inner wall of the fine knife cylinder sleeve 412 and connected with screws. The fine knife cylinder sleeve 412 and the fine knife ring 414 are positioned with the fine knife cylinder positioning long key 410 and the knife ring positioning key 411 to ensure the positional relationship between the fine knife 413 and the fine knife ring 414; the fine knife ring 414 and the fine knife outer cylinder 4 are transitionally matched and positioned with the fine knife cylinder positioning long key 410 and the knife ring positioning key 411, and are pressed tightly with the fine knife cylinder base 5 through the upper end cover 3 and fixed in the fine knife outer cylinder 4.

[0027] During broaching, the workpiece is placed on the upper end surface of the pusher 210 and fixed by the workpiece tensioning device 2. The oil cylinder drives the entire broaching device to perform broaching movement from top to bottom. During this period, the workpiece remains stationary, and the hydraulic nozzle and the entire broaching device remain relatively stationary to perform chip flushing.

[0028] When a certain number of workpieces have been broached and the entire set of tools needs to be replaced, or when individual tools are severely worn during the broaching process, only the corresponding tools need to be replaced and broaching can be resumed.

[0029] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application are included in the scope of protection of the present application.

[0030] When a certain number of workpieces have been broached and the entire set of tools needs to be replaced, or when individual tools are severely worn during the broaching process, only the corresponding tools need to be replaced and broaching can be resumed.

[0031] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application are included in the scope of protection of the present application.

Claims

1. A coarse and fine separation barrel type broaching precision cutter, characterized in that ,include: The outer cylinder (7) of the roughing knife has a plurality of pin holes and hundreds of countersunk holes on its outer circle; 14 small knife sleeves (713) are transitionally matched with the outer cylinder (7) of the roughing knife and are positioned and fixed to the inner wall of the outer cylinder (7) of the roughing knife by 14 tapered pins (710); the outer cylinder (4) of the fine knife has a keyway on its inner wall and three countersunk holes on its outer circle; the knife sleeve (412) of the fine knife cylinder transitionally matches with the outer cylinder (4) of the fine knife and is positioned by a fine knife cylinder positioning long key (410) and a knife ring positioning key (411) and connected by screws; the upper end cover (6) of the roughing knife cylinder is connected to the upper end surface of the outer cylinder (7) of the roughing knife by screws; The lower base (8) is connected to the lower end surface of the roughing knife outer cylinder (7) by screws and fixed to the machine tool by a machine tool pressing block mechanism; the upper end cover (3) is connected to the upper end surface of the fine knife outer cylinder (4) by screws; the fine knife cylinder base (5) is connected to the lower end surface of the fine knife outer cylinder (4) by screws; the positioning plate (1) is connected to the upper end surface of the upper end cover (3) by screws; the upper centering sleeve (310) is connected to the lower end surface of the upper end cover (3) by screws; The centering sleeve (611) is connected to the lower end surface of the upper end cover (6) of the rough knife cylinder by screws; The lower centering sleeve (811) is connected to the upper end surface of the lower base (8) by screws; The support ring (9) is positioned with the machine tool using a positioning key-machine tool (910); The inner sleeve (911) of the support ring is concentric with the lower centering sleeve (811), coaxial with the support ring (9) and connected with screws to ensure the coaxiality of the entire broaching device and the propeller support rod; A workpiece tensioning device (2) includes a pusher (210) supporting the bottom of the workpiece and an expansion sleeve in contact with the inner diameter of the workpiece; A thick knife strip (711) is connected to 14 small knife sleeves (713) with screws; The fine knife (413) is connected with the fine knife tube knife sleeve (412) by screws; A fine knife ring (414) is installed in the fine knife outer cylinder (4); The upper end cover (6) of the rough knife cylinder is provided with a keyway and a pin hole, and the base (5) of the fine knife cylinder is provided with two keyways. The positioning key-the upper end cover (610) of the rough knife cylinder ensures the positional relationship between the upper end cover (6) of the rough knife cylinder and the rough knife outer cylinder (7); the positioning key-the fine knife cylinder base (511) and the positioning pin-the fine knife cylinder base (510) ensure the positional relationship between the upper end cover (6) of the rough knife cylinder and the fine knife cylinder base (5); the fine knife cylinder positioning long key (410) and the knife ring positioning key (411) ensure the positional relationship between the fine knife outer cylinder (4) and the fine knife cylinder base (5). Through this series of positioning, the correct positional relationship between the rough knife strip (711), the fine knife (413) and the fine knife ring (414) is ensured. The lower base (8) is provided with two keyways, the support ring (9) is provided with a keyway, the positioning key-lower base (810) ensures the positional relationship between the lower base (8) and the roughing tool outer cylinder (7), and the positioning key-machine tool (910) ensures the positional relationship between the lower base (8), the support ring (9) and the machine tool. Through this series of positioning, the positional relationship between the machine tool and the entire broaching device is ensured.

2. A coarse and fine separation barrel-type broaching precision tool cylinder as claimed in claim 1, characterized in that The positioning plate (1) is connected to the machine tool by a positioning pin-machine tool (110) to ensure the verticality of the axial direction of the entire knife barrel and the bottom machine tool installation surface.

3. The rough and fine separation barrel-type broaching precision tool cylinder according to claim 1, characterized in that: N guide bars (712) are staggered on the inner splines of the 14 small knife sleeves (713) to support the propeller (210) on the circumference and ensure the coaxiality of the propeller (210) and the small knife sleeve (713) during the broaching process.

4. The rough and fine separation barrel-type broaching precision tool cylinder according to claim 1, characterized in that: On the inner splines of the 14 small knife sleeves (713), n rough knife strips (711) are staggered front and back to avoid the guide strips, thereby reducing the number of rough knife strips (711) involved in broaching at the same time, reducing the broaching force, and avoiding the phenomenon of being unable to pull and chip jamming.

5. The rough and fine separation barrel-type broaching precision tool cylinder according to claim 1, characterized in that: The fine knife ring (414) is transitionally matched with the fine knife outer cylinder (4), is positioned by the fine knife cylinder positioning long key (410) and the knife ring positioning key (411), and is pressed tightly by the upper end cover (3) and the fine knife cylinder base (5) to be fixed in the fine knife outer cylinder (4).

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