CN221185649U

CN221185649U - Special tool for drilling and milling belt pulley

Info

Publication number: CN221185649U
Application number: CN202323236104.6U
Authority: CN
Inventors: 谢华; 刘才志; 于超; 欧旭耀; 董政明
Original assignee: Changsha Aerospace School
Current assignee: Changsha Aerospace School
Priority date: 2023-11-29
Filing date: 2023-11-29
Publication date: 2024-06-21
Anticipated expiration: 2033-11-29

Abstract

The utility model discloses a special tool for drilling and milling a belt pulley, which comprises a base, wherein the upper end of the base is provided with a core groove, a positioning core is detachably connected in the core groove, the upper end of the base is also provided with two fastening components, and the fastening components comprise: the clamp plate, lock nut and fastening rod, the one end of clamp plate reciprocates along the fastening rod, the upper end at the base is fixed to the fastening rod, lock nut and fastening rod threaded connection. Compared with the prior art, the tooling provided by the utility model is a professional tooling for processing the belt pulley, can finish the processing of all working procedures through one-time clamping, avoids the manual operation error of the bench work processing, avoids the problem that each belt pulley needs to be aligned, can process different types of belt pulleys through replacing a positioning core and adjusting the height of a fastening rod, and avoids the operation that the belt pulley must be repositioned each time. Compared with the existing mode, the efficiency and the precision are greatly improved.

Description

Special tool for drilling and milling belt pulley

Technical Field

The utility model relates to the technical field of workpiece pin hole machining, in particular to a special tool for belt pulley drilling and milling.

Background

A modified small-sized belt pulley is characterized in that a turning part of a part and an in-hole key groove (the shape and the size of the key groove are different according to a connected motor shaft, and the key groove is in various forms of single key, double key and multiple key) are processed and molded, and 2 positioning pin holes and 6 threaded holes are needed to be processed subsequently. The current processing method is as follows: the bench worker is with dividing head processing screw hole and tapping on the drilling machine, and the rethread three-jaw chuck clamping is bored behind alignment keyway position on numerically controlled fraise machine, and the reaming processing location pinhole has following problem in prior art processing:

1. the production efficiency is low, machining can be completed only through 2 working procedures, namely, machining of threaded holes by a bench worker, and numerical control milling of positioning pin holes are achieved.

2. The precision of the processing position of the threaded hole is low, the fitter can position the threaded hole through the dividing head, 6 threaded holes can be uniformly distributed around a certain center through the positioning of the dividing head, but the positions of the threaded holes and the center of the belt pulley are manually adjusted by the fitter, and the precision is all dependent on the skill level of an operator.

3. The parallelism error of the threaded hole and the bottom surface of the belt pulley is large, the threaded hole is used for clamping the excircle of the belt pulley, and when the excircle is not perpendicular to the end surface or the clamping mode is incorrect, the axis of the machined threaded hole is inclined, so that the belt pulley cannot be assembled finally.

4. The numerical control milling and aligning key slot has low efficiency, and the three-jaw chuck can not clamp, align and position the core after clamping the belt pulley, and can only align the two side surfaces of the key slot through the lever dial indicator, and can only find one piece after about 4-8 minutes under the condition that an operator is skilled.

Disclosure of utility model

The utility model provides a special tool for drilling and milling a belt pulley, which is used for solving at least one of the technical problems.

The utility model provides a special tool for drilling and milling a belt pulley, which comprises a base, wherein the upper end of the base is provided with a core groove, a positioning core is detachably connected in the core groove, the upper end of the base is also provided with two fastening components, and the fastening components comprise: the clamp plate, lock nut and fastening rod, the one end of clamp plate reciprocates along the fastening rod, the upper end at the base is fixed to the fastening rod, lock nut and fastening rod threaded connection.

Preferably, a spring is arranged on the fastening rod between the pressing plate and the base.

Preferably, the fastening assembly further comprises a supporting rod, the lower end of the supporting rod is in threaded connection with the base, and the upper end of the supporting rod is attached to the pressing plate.

Preferably, the fastening rod is a double-ended screw rod, and the lower end of the double-ended screw rod is in threaded connection with the base.

Preferably, the pressing plate is provided with a waist-shaped hole, and the double-headed screw rod penetrates through the waist-shaped hole.

Preferably, a positioning key is fixed at the bottom of the base.

Preferably, the positioning core comprises a positioning plate and a clamping part fixed on the positioning plate, and the positioning plate is fixed in the core groove through a locking screw.

Preferably, a gasket is arranged between the pressing plate and the locking nut.

Preferably, two of said fastening assemblies are symmetrically distributed along the positioning core.

Preferably, the base is provided with an avoidance groove, and the avoidance groove is arranged on the outer side of the positioning core.

Compared with the prior art, the tooling provided by the utility model is a professional tooling for processing the belt pulley, can finish the processing of all working procedures (2 positioning pin holes and 6 threaded holes) through one-time clamping, avoids the manual operation error of bench worker processing, ensures the coaxiality of the threaded holes and key slots and the symmetry of the positioning pin holes and key slots by only aligning the center of a positioning core once when the tooling is arranged on a workbench, avoids the problem that each belt pulley needs to be aligned, and simultaneously can process belt pulleys of different types by replacing the positioning core and adjusting the height of a fastening rod, and avoids the operation that the belt pulley must be repositioned each time. Compared with the existing mode, the efficiency and the precision are greatly improved.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the pulley of the present utility model mounted on a clamp;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a front view of the present utility model;

FIG. 4 is a top view of the present utility model;

FIG. 5 is a schematic view of the structure of the base of the present utility model;

FIG. 6 is a schematic view of a first positioning core according to the present utility model;

FIG. 7 is a schematic view of a second positioning core according to the present utility model;

Fig. 8 is a physical diagram of the present utility model.

Reference numerals:

1. The device comprises a base, 11, a core groove, 12, a positioning key, 13, a dodging groove, 2, a positioning core, 21, a positioning plate, 22, a clamping part, 3, a fastening component, 31, a pressing plate, 32, a locking nut, 33, a fastening rod, 34, a spring, 311, a waist-shaped hole, 4, a supporting rod, 5, a locking screw, 6, a gasket and 7, and a belt pulley.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, this embodiment provides a special fixture for belt pulley drilling and milling, including base 1, the upper end of base 1 is equipped with core groove 11, and the interior detachable location core 2 that is connected with of core groove 11 still is equipped with two fastening components 3 in the upper end of base 1, and fastening component 3 is used for fixing belt pulley 7 on base 1. The fastening assembly 3 includes: the clamp plate 31, lock nut 32 and fastening rod 33, the one end of clamp plate 31 reciprocates along fastening rod 33, and fastening rod 33 is fixed in the upper end of base 1, lock nut 32 and fastening rod 33 threaded connection. The positioning cores 2 and the base 1 are designed to be detachably connected, so that different positioning cores 2 can be conveniently installed according to the number of key grooves in holes of the belt pulley 7. The bottom surface of the belt pulley 7 is attached to the surface of the base 1 by the pressing plate 31, and the clamping force direction is consistent with the drilling cutting force direction, so that the perpendicularity of the hole to be processed and the bottom surface of the belt pulley 7 is ensured.

As another embodiment of the present utility model: referring to fig. 3, a spring 34 is provided on a fastening rod 33 between the pressing plate 31 and the base 1, and when the lock nut 32 is released, the pressing plate 31 is pushed up by the spring 34, so that the pulley 7 can be replaced conveniently.

As another embodiment of the present utility model: the fastening component 3 further comprises a supporting rod 4, the lower end of the supporting rod 4 is in threaded connection with the base 1, and the upper end of the supporting rod 4 is attached to the pressing plate 31. The mode of the threaded connection with the base 1 is convenient for adjusting the height of the supporting rod 4, the height of the supporting rod 4 is approximately the same as the height of the belt pulley 7 on the base 1, and in the structural design, when the locking nut 32 is screwed down to press the pressing plate 31 to the belt pulley 7, the pressing plate 31 cannot be higher at one end and lower at the other end.

Specifically, the fastening rod 33 is a double-ended screw, and the lower end of the double-ended screw is in threaded connection with the base 1.

As another embodiment of the present utility model: referring to fig. 4, the pressing plate 31 is provided with a waist-shaped hole 311, and a double-headed screw is passed through the waist-shaped hole 311, and the pressing plate 31 can be horizontally moved so as to adjust the distance between the pressing plate 31 and the pulley 7.

As another embodiment of the present utility model: the bottom of the base 1 is fixed with a positioning key 12, and the positioning key 12 is clamped in an installation groove of the numerical control milling workbench so as to install the base 1 on the numerical control milling workbench. In this arrangement, the parallelism of the key groove of the pulley 7 and the hole to be machined is ensured by the positioning key 12.

As another embodiment of the present utility model: the positioning core 2 includes a positioning plate 21 and a clamping portion 22 fixed on the positioning plate 21, and the positioning plate 21 is fixed in the core groove 11 by the locking screw 5. The positioning core 2 in fig. 6 is adapted to one spline pulley 7, and the positioning core 2 in fig. 7 is adapted to six spline pulleys 7.

Specifically, a washer 6 is provided between the pressing plate 31 and the lock nut 32.

The two fastening assemblies 3 are symmetrically distributed along the positioning core 2, and in particular, the fastening assemblies 3 are distributed along one diagonal of the base 1. This setting can the space of rational utilization base 1, can effectively reduce the length of base 1.

As another embodiment of the present utility model: referring to fig. 5, an avoidance groove 13 is formed in the base 1, the avoidance groove 13 is formed in the outer side of the positioning core 2, a drill bit and a tap are avoided when the avoidance groove 13 is used for machining 6 threaded holes, the tool and the cutter are protected, and chips fall into the avoidance groove 13, so that uneven installation of the belt pulley 7 caused by the chips clamped between the belt pulley 7 and the base 1 is avoided.

Specifically, the positioning key 12, the axis of the positioning core 2, and the side surface of the base 1 are all parallel to each other.

The specific implementation process of the utility model is as follows:

The positioning key 12 is clamped into the mounting groove of the numerical control milling workbench, the side surface of the base 1 is aligned by the dial indicator and then is tightly pressed by the screw, so that the parallelism between the positioning core 2 and the numerical control milling workbench surface can be ensured, and the parallelism between 2 positioning pin holes and the side surface of the key groove on the belt pulley 7 is ensured.

The positioning cores 2 are installed, different positioning cores 2 are selected according to the key groove type of the belt pulley 7, 1 key on the clamping part 22 is ensured to be opposite to the Y axis of the workbench during installation, and the positioning cores 2 are fixed on the base 1 by the locking screw 5.

The belt pulley 7 is installed, the key groove of the belt pulley 7 is aligned with the positioning core 2 to be slightly placed, the fastening rod 33 and the supporting rod 4 are installed, the fastening rod 33 is sleeved with the spring 34 and the pressing plate 31, the belt pulley 7 is tightly pressed by the locking nuts 32, 2 locking nuts 32 are required to uniformly exert force in the pressing process, and the phenomenon that the bottom of the belt pulley 7 is not attached to the base 1 due to overlarge force at one end is avoided.

The belt pulley 7 is aligned, and the inner hole of the belt pulley 7 is aligned to be coaxial with the main shaft of the machine tool by using a dial indicator.

After the belt pulley 7 is machined, the pressing plate 31 can automatically lift under the action of the spring 34 only by loosening the locking nut 32, so that the new belt pulley 7 is convenient to install and machine.

The tooling provided by the utility model is a professional tooling for processing the belt pulley 7, can finish the processing of all working procedures (2 positioning pin holes and 6 threaded holes) through one-time clamping, avoids the manual operation error of the bench worker processing, ensures the coaxiality of the threaded holes and key slots and the symmetry of the positioning pin holes and key slots by only aligning the center of the positioning core 2 once when the tooling is arranged on a workbench, avoids the problem that each belt pulley 7 needs to be aligned, and simultaneously can process different types of belt pulleys 7 by replacing the positioning core 2 and adjusting the height of the fastening rod 33, and avoids the operation that the belt pulley 7 needs to be repositioned each time. Compared with the existing mode, the efficiency and the precision are greatly improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A special frock for belt pulley bores and mills processing, its characterized in that includes the base, the upper end of base is equipped with the core groove, can dismantle in the core groove and be connected with the location core, the upper end of base still is equipped with two fastening components, fastening components includes: the clamp plate, lock nut and fastening rod, the one end of clamp plate reciprocates along the fastening rod, the upper end at the base is fixed to the fastening rod, lock nut and fastening rod threaded connection.

2. The special tooling for the drilling and milling of the belt pulley according to claim 1, wherein a spring is arranged on a fastening rod between the pressing plate and the base.

3. The tooling special for drilling and milling a belt pulley according to claim 2, wherein the fastening assembly further comprises a support rod, the lower end of the support rod is in threaded connection with the base, and the upper end of the support rod is attached to the pressing plate.

4. The special fixture for drilling and milling a belt pulley according to claim 3, wherein the fastening rod is a double-ended screw, and the lower end of the double-ended screw is in threaded connection with the base.

5. The tooling special for drilling and milling a belt pulley according to claim 4, wherein the pressing plate is provided with a waist-shaped hole, and the double-headed screw rod penetrates through the waist-shaped hole.

6. The tooling special for drilling and milling a belt pulley according to claim 1, wherein a positioning key is fixed at the bottom of the base.

7. The tooling special for drilling and milling a belt pulley according to claim 1, wherein the positioning core comprises a positioning plate and a clamping part fixed on the positioning plate, and the positioning plate is fixed in the core groove through a locking screw.

8. The tooling special for drilling and milling a belt pulley according to claim 1, wherein a washer is arranged between the pressing plate and the lock nut.

9. The tooling for pulley milling of claim 1 wherein two of the fastener assemblies are symmetrically distributed along the locating core.

10. The special tool for drilling and milling the belt pulley according to claim 9, wherein the base is provided with an avoidance groove, and the avoidance groove is arranged on the outer side of the positioning core.