阅读说明：本技术 一种推式涨套精车夹具 (Push-type cover finish turning anchor clamps that rise ) 是由 杨高望 严鉴铂 寇植达 王海珠 陈乐乐 于 2021-06-28 设计创作，主要内容包括：本发明提出一种推式涨套精车夹具,以解决现有齿轮内腔端面定位夹具无法安装的技术问题。包括法兰盘、推杆、涨套定位锥、粘接涨套、多个回退弹簧、推套、螺纹调节套及多个螺纹销；推杆前端伸入法兰盘的中心孔内,推杆后端伸出法兰盘大端；所述涨套定位锥的定位锥小端与法兰盘小端通过螺栓连接,其大端法兰上设置有多个外花键；所述粘接涨套套设在涨套定位锥上；多个回退弹簧设置在粘接涨套前端面与大端法兰后端面之间；所述推套套设在法兰盘小端,法兰盘小端侧壁上设置有轴向延伸的腰形孔,穿过腰形孔的螺纹销一端与推套连接,另一端与推杆前端连接,螺纹调节套套设在推套上且与推套螺纹连接。(The invention provides a push-type expansion sleeve finish turning clamp, which aims to solve the technical problem that the existing gear inner cavity end face positioning clamp cannot be installed. The device comprises a flange plate, a push rod, an expansion sleeve positioning cone, an adhesive expansion sleeve, a plurality of backspacing springs, a push sleeve, a thread adjusting sleeve and a plurality of thread pins; the front end of the push rod extends into the central hole of the flange plate, and the rear end of the push rod extends out of the large end of the flange plate; the small end of the positioning cone of the expansion sleeve positioning cone is connected with the small end of the flange plate through a bolt, and a plurality of external splines are arranged on a flange at the large end of the expansion sleeve positioning cone; the bonding expansion sleeve is sleeved on the expansion sleeve positioning cone; the plurality of retraction springs are arranged between the front end face of the bonding expansion sleeve and the rear end face of the large-end flange; the push sleeve is sleeved at the small end of the flange plate, a waist-shaped hole extending axially is formed in the side wall of the small end of the flange plate, one end of a threaded pin penetrating through the waist-shaped hole is connected with the push sleeve, the other end of the threaded pin is connected with the front end of the push rod, and the threaded adjusting sleeve is sleeved on the push sleeve and is in threaded connection with the push sleeve.)

1. The utility model provides a push-type cover finish turning anchor clamps that rise which characterized in that:

the device comprises a flange plate (6), a push rod (7), an expansion sleeve positioning cone (3), an adhesion expansion sleeve (4), a plurality of backspacing springs (12), a push sleeve (2), a thread adjusting sleeve (10) and a plurality of thread pins (13);

the front end (72) of the push rod (7) extends into the central hole of the flange plate (6), and the rear end (71) of the push rod extends out of the flange plate large end (61) of the flange plate (6);

the expansion sleeve positioning cone (3) is of a hollow frustum structure with a large-end flange (33), the small end (31) of the positioning cone is connected with the small end (62) of the flange plate (6) through bolts, and the large-end flange (33) is provided with a plurality of external splines (34); the external spline (34) can penetrate through a spline hole of the gear piece (1) to be machined;

the bonding expansion sleeve (4) is sleeved on the expansion sleeve positioning cone (3) and comprises a plurality of nonmetal material elastic joints (41) and a plurality of conical joints (42) which are arranged in a staggered mode and bonded into a ring shape; the outer end surface (43) of the conical section is an arc surface and is matched with a spline hole of a gear piece (1) to be processed, and the inner end surface (44) of the conical section is a conical arc surface and is matched with the arc surface of the expansion sleeve positioning cone (3); the outer diameter of the bonding expansion sleeve (4) is smaller than the diameter of a spline hole of the gear piece (1) to be processed;

the plurality of the back-off springs (12) are arranged between the front end surface of the bonding expansion sleeve (4) and the rear end surface of the large-end flange (33);

the push sleeve (2) is sleeved on the small end (62) of the flange plate, and a plurality of first threaded holes (21) are formed in the side wall of the push sleeve; the side wall of the small end (62) of the flange plate is provided with a corresponding waist-shaped hole (63) extending axially; the side wall of the front end (72) of the push rod is provided with a corresponding second threaded hole (73); one end of a threaded pin (13) penetrating through the waist-shaped hole (63) is connected with the push sleeve (2) through a first threaded hole (21), and the other end of the threaded pin is connected with the front end (72) of the push rod through a second threaded hole (73);

the thread adjusting sleeve (10) is sleeved on the push sleeve (2) and is in threaded connection with the push sleeve (2).

2. The push-type expanding sleeve finish turning clamp of claim 1, wherein:

and the device also comprises a plurality of elastic stop pins (8) which are arranged on the external spline (34) and extend backwards.

3. The push-type expanding sleeve finish turning clamp of claim 1 or 2, wherein:

the front end face of the thread adjusting sleeve (10) is provided with a plurality of elastic plungers (9) which extend forwards.

4. The push-type expanding sleeve finish turning clamp of claim 3, wherein:

and a spigot fit (14) is arranged between the expansion sleeve positioning cone (3) and the flange small end (62).

5. The push-type expanding sleeve finish turning clamp of claim 4, wherein:

the number of the back-off springs (12) is six, and the back-off springs are evenly distributed on the circumference.

6. The push-type expanding sleeve finish turning clamp of claim 4, wherein:

the number of the threaded pins (13) is two, and the threaded pins are symmetrically distributed.

Technical Field

The invention relates to a turning clamp, in particular to a push type expansion sleeve finish turning clamp.

Background

The machining process of a certain gear part requires turning a conical surface, an inner hole and an end surface after heating, and generally adopts the axial size positioning of the end surface at one side of the gear and the centering of a spline hole. However, after the machining process reference is changed into the gear inner cavity end surface T (see fig. 1) and the spline hole, the existing positioning fixture cannot be installed due to the limitation of the size of the gear inner cavity end surface T, and therefore a new fixture needs to be designed.

Disclosure of Invention

The invention aims to solve the technical problem that the existing gear inner cavity end face positioning clamp cannot be installed, and provides a push type expansion sleeve finish turning clamp which adopts a reverse pushing mode to realize gear inner cavity end face positioning and spline hole centering.

The technical solution of the invention is as follows:

a push-type expansion sleeve finish turning clamp is characterized by comprising a flange plate, a push rod, an expansion sleeve positioning cone, a bonding expansion sleeve, a plurality of backspacing springs, a push sleeve, a thread adjusting sleeve and a plurality of thread pins; the front end of the push rod extends into the central hole of the flange plate, and the rear end of the push rod extends out of the large end of the flange plate; the expansion sleeve positioning cone is of a hollow frustum structure with a large-end flange, the small end of the positioning cone is connected with the small end of the flange plate through a bolt, and the large-end flange is provided with a plurality of external splines; the external spline can penetrate through a spline hole of the gear piece to be machined; the bonding expansion sleeve is sleeved on the expansion sleeve positioning cone and comprises a plurality of nonmetal material elastic joints and a plurality of conical joints which are arranged in a staggered mode and bonded into a ring shape; the outer end surface of the conical section is an arc surface and is matched with a spline hole of a gear piece to be processed, and the inner end surface of the conical section is a conical arc surface and is matched with the arc surface of the expansion sleeve positioning cone; the outer diameter of the bonding expansion sleeve is slightly smaller than the diameter of a spline hole of the gear piece to be processed; the plurality of the backspacing springs are arranged between the front end surface of the bonding expansion sleeve and the rear end surface of the large-end flange; the push sleeve is sleeved on the small end of the flange plate, and a plurality of first threaded holes are formed in the side wall of the push sleeve; the side wall of the small end of the flange plate is provided with a corresponding waist-shaped hole extending axially; the side wall of the front end of the push rod is provided with a corresponding second threaded hole; one end of the threaded pin penetrating through the waist-shaped hole is connected with the push sleeve through a first threaded hole, and the other end of the threaded pin is connected with the front end of the push rod through a second threaded hole; the thread adjusting sleeve is sleeved on the push sleeve and is in threaded connection with the push sleeve.

In order to prevent the sliding risk caused by the overlarge rotation angle, the push-type expansion sleeve finish turning clamp further comprises a plurality of elastic stop pins which are arranged on the external spline and extend backwards.

In order to ensure that the end surface of the inner cavity of the gear piece to be processed can be attached to the inner side positioning end surface of the flange at the large end of the expansion sleeve positioning cone before the push rod pushes the bonding expansion sleeve to be expanded, the front end surface of the thread adjusting sleeve is provided with a plurality of elastic plungers which extend forwards.

In order to ensure the coaxiality of the expansion sleeve positioning cone and the flange plate, a spigot is arranged between the expansion sleeve positioning cone and the small end of the flange plate for matching.

The number of the backspacing springs is six, and the backspacing springs are evenly distributed on the circumference.

The number of the threaded pins is two, and the threaded pins are symmetrically distributed.

The invention has the beneficial effects that:

1. the invention separates the pull rod from the expansion sleeve, the expansion sleeve also becomes a split structure, the pulling expansion is changed into the pushing expansion, and the possibility of assembling and disassembling the gear piece to be processed when the end surface of the inner cavity is positioned is fully considered, thereby realizing the positioning and clamping of the end surface of the inner cavity of the gear and the spline hole.

2. Because the existing pull type clamp cannot realize the positioning of the end face of the inner cavity, the reference conversion is needed, and the end face and the conical surface of the inner cavity must be simultaneously turned after heating. The clamp realizes the positioning of the end surface of the inner cavity, so the process step of turning the end surface of the inner cavity after heating is omitted, the efficiency is improved, and the production cost is reduced.

3. The existing pull type clamp cannot realize the positioning of the end face of an inner cavity and must be converted to the end face of a gear through a reference, so that the conversion error of non-uniform reference is brought. The length size of the hot post-turned conical surface is designed to be the reference of the inner cavity end surface, the fixture realizes the positioning of the inner cavity end surface, the process step of hot post-turning the end surface is omitted, and meanwhile, the reference is unified, so that the positioning error is reduced, and the processing precision is improved.

Drawings

FIG. 1 is a schematic view of a gear piece to be machined;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic view of the present invention in connection with a gear member to be machined;

FIG. 5 is a schematic diagram of the external spline of the expansion sleeve positioning cone and the spline hole of the gear piece to be machined in the invention;

FIG. 6 is a schematic view showing the positional relationship between the flange and the push rod in the present invention;

FIG. 7 is a cross-sectional view of the flange of the present invention;

FIG. 8 is a perspective view of the flange of the present invention;

FIG. 9 is a schematic perspective view of the adhesive expanding sleeve of the present invention;

FIG. 10 is a perspective view of the positioning cone of the expanding sleeve of the present invention;

FIG. 11 is a cross-sectional view of an expansion sleeve positioning cone of the present invention;

wherein: 1-a gear piece to be processed, 2-a push sleeve, 21-a first threaded hole, 3-an expansion sleeve positioning cone, 31-a positioning cone small end, 33-a large end flange, 34-an external spline, 4-a bonding expansion sleeve, 41-an elastic joint, 42-a conical joint, 43-an external end surface, 44-an internal end surface, 6-a flange plate, 61-a flange plate large end, 62-a flange plate small end, 63-a kidney-shaped hole, 7-a push rod, 71-a push rod rear end, 72-a push rod front end, 73-a second threaded hole, 8-an elastic stop pin, 9-an elastic plunger, 10-a thread adjusting sleeve, 12-a backset spring, 13-a thread pin, 14-spigot matching and a T-positioning surface.

Detailed Description

The invention relates to a push-type expansion sleeve finish turning clamp which comprises a flange plate 6, a push rod 7, an expansion sleeve positioning cone 3, an adhesive expansion sleeve 4, six backspacing springs 12, a push sleeve 2, a thread adjusting sleeve 10 and two thread pins 13, wherein the push rod is connected with the expansion sleeve positioning cone through a screw rod; the front end 72 of the push rod 7 extends into the central hole of the flange 6, and the rear end 71 of the push rod extends out of the large end 61 of the flange 6; the expansion sleeve positioning cone 3 is of a hollow frustum structure with a large-end flange 33, the small end 31 of the positioning cone is connected with the small end 62 of the flange plate 6 through bolts, six external splines 34 are arranged on the large-end flange 33, and an elastic stop pin 8 extends backwards from each external spline 34; the external spline 34 can pass through a spline hole of the gear piece 1 to be machined; the bonding expansion sleeve 4 is of a reverse cone split structure, is sleeved on the expansion sleeve positioning cone 3 and comprises eight nonmetal material elastic joints 41 and eight conical joints 42 which are staggered and bonded into a ring shape; the outer end surface 43 of the conical section is an arc surface and is matched with the spline hole of the gear piece 1 to be processed, and the inner end surface 44 of the conical section is a conical arc surface and is matched with the arc surface of the expansion sleeve positioning cone 3; the outer diameter of the bonding expansion sleeve 4 is slightly smaller than the diameter of a spline hole of the gear piece 1 to be processed; in order to prevent the self-locking of the bonding expansion sleeve, six retraction springs 12 are arranged to assist in loosening the bonding expansion sleeve 4; six retraction springs 12 are arranged between the front end surface of the bonding expansion sleeve 4 and the rear end surface of the large-end flange 33. The push sleeve 2 is sleeved on the small end 62 of the flange plate, and two first threaded holes 21 are formed in the side wall of the push sleeve; two corresponding waist-shaped holes 63 which axially extend are arranged on the side wall of the small end 62 of the flange plate; two corresponding second threaded holes 73 are formed in the side wall of the front end 72 of the push rod; one end of the threaded pin 13 penetrating through the waist-shaped hole 63 is connected with the push sleeve 2 through the first threaded hole 21, and the other end is connected with the front end 72 of the push rod through the second threaded hole 73; the thread adjusting sleeve 10 is sleeved on the push sleeve 2 and is in threaded connection with the push sleeve 2; the front end surface of the thread adjusting sleeve 10 is provided with three elastic plungers 9 which extend forwards. The front end face of the thread adjusting sleeve 10 is provided with the elastic plunger 9 which can assist in pushing the gear piece to be processed tightly, so that the end face of the inner cavity of the thread adjusting sleeve is tightly attached to the rear end face of the large-end flange of the expansion sleeve positioning cone 3 to ensure the axial dimension. Because the gear piece to be processed must be pushed and tightened, the conical surface must be designed into an inverted cone, so the expansion sleeve positioning cone 3 and the flange small end 32 are designed into a split type, and the coaxiality is ensured by the spigot matching 14.

The working process and the design principle of the invention are as follows:

the corresponding external splines 34 are processed on the expansion sleeve positioning cone 3 according to the spline hole of the gear piece 1 to be processed, the end face of the external splines 34 is guaranteed to be perpendicular to the center of the taper, after the gear piece 1 to be processed is sleeved into the large-end flange 33 of the expansion sleeve positioning cone 3 from the spline hole, one tooth is rotated, the inner end face of the spline tooth is tightly attached and positioned, in order to prevent the risk of falling off when the rotation angle is too large, the elastic stop pin 8 is arranged at the end face of the expansion sleeve positioning cone 3, and the rotation limit of the gear piece 1 to be processed after being installed is guaranteed.

The end face of the expansion sleeve positioning cone 3 is provided with backspacing springs 12 in six uniform distribution modes, and after the bonding expansion sleeve 4 is pushed into the tensioned gear piece 1 to be processed, the backspacing springs 12 are compressed; when the adhesive expanding sleeve 4 is loosened, the retracting spring 12 extends to push away the adhesive expanding sleeve 4, so that the adhesive expanding sleeve 4 is prevented from self-locking and cannot retract. When the backspacing spring 12 is designed, the rigidity needs to be checked, so that the self-locking of the bonding expansion sleeve 4 can be overcome, and the self-locking cannot be too large, so that the tensioning effect of the bonding expansion sleeve 4 is not influenced.

The thread adjusting sleeve 10 is connected to the pushing sleeve 2 by adopting a thread structure, the end face of the thread adjusting sleeve is provided with the elastic plunger 9, the elastic plunger 9 is screwed to a proper distance by adjusting threads, the elastic force of the elastic plunger 9 is controlled, the end face T of the inner cavity of the gear piece 1 to be processed can be ensured to be attached to the inner side positioning end face of the large-end flange 33 of the positioning cone 3 of the expanding sleeve before the push rod 7 pushes the bonding expanding sleeve 4 to be tensioned, and the reliability of the axial end face positioning of the gear piece 1 to be processed is ensured.

The push sleeve 2 is connected with a push rod 7 through a threaded pin 13, the thrust of the push rod 7 acts on the bonding expansion sleeve 4 through the push sleeve 2, the bonding expansion sleeve 4 slides forwards on the expansion sleeve positioning cone 3 to expand, and the gear piece to be processed is centered and expanded. After the processing is finished, the push rod 7 retreats, and the bonding expansion sleeve 4 is loosened.