CN116140697A

CN116140697A - Spline shaft broaching equipment

Info

Publication number: CN116140697A
Application number: CN202310353182.XA
Authority: CN
Inventors: 顾成义; 傅排先; 唐杰; 周永国; 李秀勇; 吴加仁; 王慧
Original assignee: Jiangsu Haiyu Machinery Co ltd
Current assignee: Jiangsu Haiyu Machinery Co ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-05-23
Anticipated expiration: 2043-04-04
Also published as: CN116140697B

Abstract

The invention relates to the technical field of spline shaft machining equipment, and discloses spline shaft broaching equipment. The spline shaft broaching equipment comprises a support, wherein the upper end face of the support is fixedly connected with a sliding rod through a fixing frame, the right part of the sliding rod is slidably provided with a multi-level broaching mechanism for accelerating the broaching speed, the left part of the sliding rod is slidably provided with a cleaning piece for cleaning broaching scraps, the upper part of the fixing frame is provided with a switching piece for controlling the multi-level broaching mechanism and the cleaning piece, the heights of extrusion plates are sequentially reduced from back to front, the end part of each compression column and the front end face of the extrusion plate corresponding to the compression column are positioned on the same plane, and the compression columns sequentially arranged from right to left are matched with the extrusion plates sequentially reduced from back to front.

Description

Spline shaft broaching equipment

Technical Field

The invention relates to the technical field of spline shaft machining equipment, in particular to spline shaft broaching equipment.

Background

The spline shaft is a mechanical transmission part, and is used for transmitting mechanical torque as a flat key, a semicircular key and an inclined key, longitudinal key grooves are formed in the outer surface of the spline shaft, a rotating piece sleeved on the spline shaft is also provided with corresponding key grooves so as to keep synchronous rotation with the shaft, and when the spline shaft rotates, the spline shaft can longitudinally slide on the shaft, such as a gear box gear shifting gear and the like, and the spline shaft through groove is formed by milling a cylindrical blank.

In the conventional spline shaft machining equipment, in the process of reciprocating broaching operation of a blank, as the depth of a broach cutting into the blank in the single stroke movement process of the broach is fixed, a plurality of reciprocating movements are needed to be repeated to broach a key slot with the required depth, the broaching time is prolonged, the broaching efficiency is influenced, and although the number of reciprocating movement times of the broach can be reduced by adjusting the broaching depth of the broach, the probability of damage to the blank is increased due to the fact that the single broaching depth is too deep in the mode.

In addition, in broaching processing operation, the piece that processing produced is more, and the piece can pile up in the keyway, and current broaching equipment can not in time handle the piece that produces, influences the machining precision of spline.

Disclosure of Invention

The invention provides spline shaft broaching equipment, which solves the technical problems that broaching processing can be completed only by repeating a broaching depth unit for a plurality of times during single-pass movement, the broaching efficiency is low, and chips are accumulated in a key groove to influence processing precision.

The invention provides spline shaft broaching equipment which comprises a support, wherein the upper end face of the support is fixedly connected with a sliding rod through a fixing frame, the right part of the sliding rod is slidably provided with a multi-level broaching mechanism for accelerating the broaching speed, the left part of the sliding rod is slidably provided with a cleaning piece for cleaning broaching scraps, the upper part of the fixing frame is provided with a switching piece for controlling the multi-level broaching mechanism and the cleaning piece, the multi-level broaching mechanism comprises a plurality of first sliding frames which are equidistantly and slidably connected to the outer parts of the sliding rod, broaches fixedly connected to the lower parts of the first sliding frames, compression columns fixedly connected to the front end faces of the first sliding frames, the compression columns sequentially lengthen from right to left, a plurality of extrusion plates which are fixedly connected to the front parts of the fixing frame through the fixing rods and are simultaneously positioned in front of the first sliding frames and are matched with the compression columns, the extrusion plates sequentially decrease from back to front, and the end parts of each compression column and the front end faces of the extrusion plates corresponding to the compression columns are positioned on the same plane.

In a possible implementation manner, the switching piece comprises a sliding box fixedly connected to the upper portion of the fixing frame, a sliding component is slidingly connected to the inner portion of the sliding box, a reciprocating electric telescopic rod is fixedly connected between the sliding component and the right cavity wall of the sliding box, a ram is rotatably connected to the inner portion of the sliding component through a vertical plate, a distance-adjusting electric telescopic rod is hinged to the right end of the ram, a transverse plate is fixedly connected to the lower end of the distance-adjusting electric telescopic rod, and a plurality of spring telescopic columns are fixedly connected to the lower end face of the transverse plate at the same time corresponding to the first sliding frame at the same time.

In a possible implementation manner, the cleaning piece comprises a second sliding frame which is slidably connected to the left part of the sliding rod, a cleaning disc is rotatably connected to the lower part of the second sliding frame through a rotating shaft, a cylindrical brush is fixedly connected to the middle part of the lower end face of the cleaning disc, a spiral elastic poking piece is wound outside the cylindrical brush, a gear is fixedly connected to the outer part of the rotating shaft, a rack which is used for being meshed with the gear is fixedly connected between the left opposite side and the right opposite side of the fixing frame, a connecting rod is fixedly connected to the upper end face of the second sliding frame, and the upper end of the connecting rod is hinged to the left end of the cantilever rod.

In a possible implementation manner, the sliding assembly comprises a strip-shaped plate fixedly connected between the left side and the right side of the sliding box, a sliding frame in the sliding box is in sliding connection with the sliding plate on the upper portion of the strip-shaped plate, the lower end face of the sliding plate is fixedly connected with a friction block which is abutted to the upper portion of the strip-shaped plate through a spring telescopic rod, the lower end face of the friction block is fixedly connected with a plurality of protruding points at equal intervals, the ram is hinged in the sliding frame through a vertical plate, the rear end face of the vertical plate is fixedly connected with an arc-shaped plate, a plurality of protruding teeth are fixedly connected to the arc-shaped outer wall of the arc-shaped plate at equal intervals, and a plurality of grooves for being matched with the protruding teeth are formed in the upper end face of the sliding plate at equal intervals.

In one possible implementation manner, the upper end surface of the support is fixedly connected with a placing box with an upper opening for placing the spline shaft blank, and a clamping piece is arranged inside the placing box.

In one possible implementation, the extrusion plate is composed of a horizontal section and an inclined section fixedly connected to the left end of the horizontal section.

In one possible implementation, the sliding rod has a kidney-round vertical section.

From the above technical scheme, the invention has the following advantages:

according to the invention, through the mutual matching of the plurality of compression columns which are sequentially arranged from right to left and the extrusion plates which are sequentially reduced in height from back to front, when the compression columns move right, the compression columns are in contact with the inclined sections of the extrusion plates and are extruded to drive the broach to sequentially descend, so that the broaching processing of different depths is carried out in the single-pass moving process of the broach, the reciprocating movement times in the broaching process are reduced, the problem that the blank is damaged due to the fact that the single broaching depth is too deep is avoided, and the broaching efficiency is improved.

According to the invention, the spiral elastic poking piece and the columnar brush in the cleaning piece are combined to extend into the broached key slot, and the shape of the spiral elastic poking piece is utilized to remove the scraps accumulated in the key slot, so that the scraps are prevented from damaging the key slot in the broaching process, and the broaching precision is ensured.

According to the invention, the ram in the switching piece is respectively rotated in two directions in the right and left directions, so that the contact or separation of the multi-level broaching mechanism and the cleaning piece with the blank is controlled, and the machining flow is optimized by utilizing the organic combination of the multi-level broaching mechanism, the cleaning piece and the blank, so that the broaching and cleaning modes are more reasonable, and the machining efficiency can be improved while chips are timely removed.

Drawings

The invention and its features, aspects and advantages will become more apparent from the detailed description of non-limiting embodiments with reference to the following drawings. Like numbers refer to like parts throughout the several views, and are not intended to scale, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic structural view of a spline shaft broaching apparatus provided by the present invention.

Fig. 2 is a schematic diagram of a connection structure of a multi-level broaching mechanism, a cleaning member and a switching member provided by the invention.

Fig. 3 is an enlarged schematic diagram of a portion a of fig. 2 according to the present invention.

Fig. 4 is an enlarged schematic view of the structure of part B in fig. 2 according to the present invention.

Fig. 5 is a schematic diagram of a cross-sectional split structure of a switching member according to the present invention.

Fig. 6 is a schematic view of a rear view angle installation structure of a sliding assembly according to the present invention.

Fig. 7 is a schematic diagram of a connecting structure of a sliding rod, a broach, a compression column and a squeeze plate in a bottom view.

FIG. 8 is a schematic view of the connection structure of the sliding plate, the friction block, the spring telescopic rod and the salient point provided by the invention.

Wherein the above figures include the following reference numerals:

1. a support; 2. a fixing frame; 3. a slide bar; 4. a multi-level broaching mechanism; 41. a first sliding frame; 42. broaching tool; 43. a compression column; 44. an extrusion plate; 5. cleaning the piece; 51. a second sliding frame; 52. a cleaning plate; 53. a columnar brush; 54. a connecting rod; 55. a spiral elastic poking piece; 56. a gear; 57. a rack; 6. a switching member; 61. a slide box; 62. a sliding assembly; 621. a strip-shaped plate; 622. a sliding frame; 623. a slide plate; 624. a friction block; 625. an arc-shaped plate; 626. convex teeth; 627. a groove; 63. a reciprocating electric telescopic rod; 64. a ram; 65. a cross plate; 66. a spring telescoping column; 7. a distance-adjusting electric telescopic rod; 8. placing a box; 9. a spring telescoping rod; 10. and (5) protruding points.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1, the present invention provides a technical solution: the utility model provides a spline shaft broaching equipment, which comprises a supporting pedestal 1, support 1 up end passes through mount 2 fixedly connected with slide bar 3, slide bar 3 erects the cross-section and is the oval shape, slide bar 3 right part slidable mounting has the multistage broaching mechanism 4 that is used for accelerating the broaching speed, slide bar 3 left part slidable mounting has the clearance piece 5 that is used for the clearance of broaching piece, mount 2 upper portion is provided with the switchover piece 6 that is used for controlling multistage broaching mechanism 4 and clearance piece 5, support 1 up end fixedly connected with upper portion open-ended is used for placing box 8 that places of spline shaft blank, place box 8 inside and be provided with the holder (not shown in the figure), the holder is current can drive spline shaft blank and carries out pivoted anchor clamps.

Please refer to fig. 1, fig. 2, fig. 3, fig. 5 and fig. 6, in this embodiment, switch 6 includes the smooth box 61 of fixed frame 2 upper portion of fixed connection, sliding connection is at the inside sliding component 62 of smooth box 61, through the inside ram 64 of riser swivelling joint sliding component 62, articulated the roll adjustment electric telescopic handle 7 at ram 64 right-hand member, fixedly connected with reciprocal electric telescopic handle 63 between sliding component 62 and the smooth box 61 right cavity wall, roll adjustment electric telescopic handle 7 lower extreme fixedly connected with diaphragm 65, multistage broaching mechanism 4 includes a plurality of equidistance sliding connection in a sliding frame 41 of sliding handle 3 outside, terminal surface equidistance fixedly connected with a plurality of and a sliding frame 41 correspond simultaneously fixed connection at a sliding frame 41 spring telescopic column 66 of upper end, sliding component 62 includes fixed connection between the left and right sides of smooth box 61, sliding frame 622 of sliding connection in the inside of smooth box 61, sliding connection is at the sliding frame 621 upper portion, the terminal surface is provided with a plurality of boss 621 through spring bar 9 fixedly connected with a plurality of boss 626 on the upper end face of sliding block 624, and a plurality of arc-shaped tooth plate 626 are connected with a plurality of arc-shaped plate 626 in a fixed connection at the inside the arc-shaped groove, a plurality of arc-shaped tooth plate 626 are covered with a plurality of boss 626 fixedly connected with a plurality of arc-shaped boss 626. Limiting blocks (not shown in the figure) for limiting the sliding plate 623 are arranged on the left side and the right side of the upper end of the strip-shaped plate 621, and the limiting blocks are used for enabling the convex teeth 626 to be separated from the grooves 627, so that the arc-shaped plate 625 returns to an initial state.

Referring to fig. 2 and 3, the multi-level broaching mechanism 4 further includes a broach 42 fixedly connected to the lower portion of the first sliding frame 41, a compression column 43 fixedly connected to the front end face of the first sliding frame 41, and the compression column 43 sequentially lengthens from right to left, a plurality of squeeze plates 44 fixedly connected to the front portion of the fixing frame 2 at equal intervals through fixing rods and located in front of the first sliding frame 41 and used for being matched with the compression column 43, and the squeeze plates 44 sequentially decrease from rear to front, the squeeze plates 44 are composed of horizontal sections and inclined sections fixedly connected to the left end of the horizontal sections, and the end portion of each compression column 43 and the front end face of the squeeze plate 44 corresponding to the end portion are located on the same plane.

Before the blank is processed, the blank is placed into the placing box 8 and is clamped and fixed by the clamping piece, then the switching piece 6 moves to drive the multi-level broaching mechanism 4 to move to carry out broaching processing on the blank, when the reciprocating electric telescopic rod 63 pushes the sliding frame 622 to move rightwards, the sliding frame 622 drives the ram 64 to move rightwards, (the spring telescopic rod 9 pushes the friction block 624 to be attached to the upper surface wall of the strip-shaped plate 621, meanwhile, the friction force between the friction block 624 and the strip-shaped plate 621 is further increased due to the fact that the lower end face of the friction block 624 is provided with a plurality of protruding points 10), when the arc-shaped plate 625 on the sliding frame 622 contacts the sliding plate 623, the protruding teeth 626 on the surface wall of the arc-shaped plate 625 rub the sliding plate 623, the sliding frame 622 is resisted, the arc-shaped plate drives the ram 64 to deflect to be in a left-high-low inclined state, and the multi-level broaching mechanism 4 is in contact with the blank, and the cleaning piece 5 is separated from the blank.

The ram 64 deflects to the right to drive the distance-adjusting electric telescopic rod 7 to descend, then the distance-adjusting electric telescopic rod 7 drives the first sliding frame 41 to descend through the spring telescopic column 66, the first sliding frame 41 drives the broach 42 to descend and collide with the surface wall of the blank, the ram 64 stops deflecting and then turns to move to the right, meanwhile, the first right-most compression column 43 collides with the lower part of the corresponding last compression plate 44, then moves downwards under the compression of the inclined section of the compression plate 44, then drives the broach 42 connected with the first compression column 43 to descend to carry out one-stage deep broaching on the blank, then the first compression column 43 is contacted with the corresponding compression plate 44, and the first step is repeated.

When the broach 42 moves to the end of the broaching part of the blank, the compression column 43 also moves to the right side position of the extrusion plate 44 and is not contacted with the extrusion plate 44, the first sliding frame 41 is driven to ascend under the shrinkage of the spring telescopic column 66, the first sliding frame 41 drives the broach 42 to ascend and separate from the blank, the switching piece 6 drives the multi-level broaching mechanism 4 to move left to an initial state, the multi-level broaching mechanism 4 controls the distance-adjusting electric telescopic rod 7 to stretch to drive the broach 42 to move downwards for a certain distance before each right movement, so that the broaching of the next depth is facilitated, and after the broaching of the axial upper position of the blank is finished, the multi-level broaching mechanism 4 drives the blank to rotate for a certain angle through the clamping piece, and repeats the steps again to process the next position of the blank.

Referring to fig. 2 and 4, in the embodiment, the cleaning member 5 includes a second sliding frame 51 slidably connected to the left portion of the sliding rod 3, a cleaning disc 52 is rotatably connected to the lower portion of the second sliding frame 51 through a rotating shaft, a cylindrical brush 53 is fixedly connected to the middle portion of the lower end surface of the cleaning disc 52, a spiral elastic paddle 55 is wound around the outer portion of the cylindrical brush 53, a gear 56 is fixedly connected to the outer portion of the rotating shaft, a rack 57 engaged with the gear 56 is fixedly connected between the left and right opposite sides of the fixing frame 2, a connecting rod 54 is fixedly connected to the upper end surface of the second sliding frame 51, and the upper end of the connecting rod 54 is hinged to the left end of the cantilever 64.

When the broach 42 moves to the right end of the blank and finishes the broaching operation, the reciprocating electric telescopic rod 63 continues to push the switching piece 6 to move rightwards until the cleaning piece 5 reaches the right end of the blank, at this time, the sliding plate 623 is blocked by the right side limiting block and cannot move rightwards synchronously along with the arc plate 625, so that the convex teeth 626 are separated from the grooves 627, the arc plate 625 returns to the initial state, then the reciprocating electric telescopic rod 63 drives the sliding frame 622 to move leftwards, the sliding frame 622 drives the cantilever rod 64 to move leftwards, the arc plate 625 drives the cantilever rod 64 to deflect to be in a tilting state with high right and low left, at this time, the multi-stage broaching mechanism 4 is separated from the blank, the cleaning piece 5 is contacted with the blank, the left end of the cantilever rod 64 is lowered to drive the connecting rod 54 to descend, the connecting rod 54 is then driven to descend, the second sliding frame 51 is driven by the sliding frame 53 to stretch into the broached keyways, the cleaning disc 52 is attached to the outer wall of the blank, the gear 56 and the arc plate 57 are meshed and connected together, then the connecting rod 64 drives the connecting rod 54 to move leftwards, the second sliding frame 52 drives the sliding frame 52 and the sliding frame 64 to move leftwards, the second sliding frame 52 and then the cylindrical toothed frame 53 is driven by the sliding frame 53 to rotate along with the cylindrical toothed frame 53, and then the cylindrical toothed frame 53 is driven by the cylindrical sliding frame 53 to rotate, and then the cylindrical sliding frame 53 is driven to rotate, and then the cylindrical piece and the cylindrical piece is rotated and then the cylindrical piece 53 is rotated, the cylindrical piece is removed, and the cylindrical dust can be removed, and the dust can be removed.

During operation, firstly, a blank is placed in the placement box 8 and clamped and limited by the clamping piece, then the switching piece 6 drives the multi-level broaching mechanism 4 and the cleaning piece 5 to transversely reciprocate, the switching piece 6 drives the multi-level broaching mechanism 4 to contact with the blank during rightward movement, the cleaning piece 5 is separated from the blank, the compression column 43 with gradually longer length from right to left in the multi-level broaching mechanism 4 and the extrusion plate 44 with sequentially reduced height from back to front are combined with each other, the broach 42 can process multiple layers of different depths during single-pass movement, the movement times of the broach 42 are reduced, the machining efficiency is improved, the cleaning piece 5 contacts with the blank during leftward movement of the switching piece 6, the multi-level broaching mechanism 4 is separated from the blank, the spiral elastic poking piece 55 and the columnar brush 53 in the cleaning piece 5 are mutually matched to timely clear away scraps accumulated in a key groove during broaching, the influence of the scraps on the broaching process is avoided, and the broaching precision is ensured.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "first," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "first", "second", "first", "second" may include at least one such feature, either explicitly or implicitly. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims

1. Spline shaft broaching equipment, including support (1), its characterized in that: the upper end face of the support (1) is fixedly connected with a sliding rod (3) through a fixing frame (2), and a multi-level broaching mechanism (4) for accelerating the broaching speed is slidably arranged at the right part of the sliding rod (3);

the clearance piece (5) that are used for broaching piece clearance are installed to slide bar (3) left part slidable mounting, and mount (2) upper portion is provided with and is used for controlling switching piece (6) of multistage broaching mechanism (4) and clearance piece (5), multistage broaching mechanism (4) include:

a plurality of first sliding frames (41) which are connected with the outside of the sliding rod (3) in an equidistant sliding way, a broach (42) which is fixedly connected with the lower part of the first sliding frames (41), and a compression column (43) which is fixedly connected with the front end surface of the first sliding frames (41), wherein the compression column (43) is sequentially lengthened from right to left;

the plurality of extrusion plates (44) are fixedly connected to the front part of the fixed frame (2) at equal intervals through the fixed rods, are positioned in front of the first sliding frame (41) and are used for being matched with the compression column (43), and the heights of the extrusion plates (44) are sequentially reduced from back to front;

the end of each compression column (43) and the front end face of the extrusion plate (44) corresponding to the compression column are positioned on the same plane.

2. A spline shaft broaching apparatus according to claim 1, wherein: the switching piece (6) comprises a sliding box (61) fixedly connected to the upper portion of a fixed frame (2), a sliding assembly (62) which is in the sliding box (61) in a sliding mode, a reciprocating electric telescopic rod (63) is fixedly connected between the sliding assembly (62) and the right cavity wall of the sliding box (61), a ram (64) which is in the sliding assembly (62) is connected through vertical plate rotation, a distance-adjusting electric telescopic rod (7) which is hinged to the right end of the ram (64) is hinged to the right end of the ram, a transverse plate (65) is fixedly connected to the lower end of the distance-adjusting electric telescopic rod (7), and a plurality of spring telescopic columns (66) which are fixedly connected to the upper end of the first sliding frame (41) at the same time are fixedly connected to the lower end of the transverse plate (65) at equal intervals.

3. A spline shaft broaching apparatus according to claim 2, wherein: cleaning piece (5) are including sliding connection No. two sliding frame (51) in sliding rod (3) left portion, no. two sliding frame (51) lower part is connected with through the pivot rotation and cleans dish (52), it is provided with column brush (53) to clean terminal surface middle part fixedly connected with under dish (52), and the outside winding of column brush (53) is provided with heliciform elasticity plectrum (55), the outside fixedly connected with gear (56) of pivot, fixedly connected with is used for rack (57) with gear (56) meshing about mount (2) between the opposite sides, no. two sliding frame (51) up end fixedly connected with connecting rod (54), connecting rod (54) upper end and ram (64) left end are articulated mutually.

4. A spline shaft broaching apparatus according to claim 2, wherein: the sliding component (62) comprises a strip-shaped plate (621) fixedly connected between the left side and the right side of the sliding box (61), a sliding frame (622) is connected inside the sliding box (61) in a sliding mode, a sliding plate (623) is connected to the upper portion of the strip-shaped plate (621) in a sliding mode, a friction block (624) is fixedly connected to the lower end face of the sliding plate (623) through a spring telescopic rod (9), a plurality of protruding points (10) are fixedly connected to the lower end face of the friction block (624) in an equidistant mode, the cantilever rod (64) is hinged inside the sliding frame (622) through a vertical plate, an arc plate (625) is fixedly connected to the rear end face of the vertical plate, a plurality of protruding teeth (626) are fixedly connected to the arc-shaped outer wall of the arc plate (625), and grooves (627) matched with the protruding teeth (626) are formed in the upper end face of the sliding plate (623) in an equidistant mode.

5. A spline shaft broaching apparatus according to claim 1, wherein: the novel spline shaft blank placing device is characterized in that the upper end face of the support (1) is fixedly connected with a placing box (8) with an opening at the upper part and used for placing the spline shaft blank, and a clamping piece is arranged inside the placing box (8).

6. A spline shaft broaching apparatus according to claim 1, wherein: the extruding plate (44) consists of a horizontal section and an inclined section fixedly connected to the left end of the horizontal section.

7. A spline shaft broaching apparatus according to claim 1, wherein: the vertical section of the sliding rod (3) is in a oval shape.