CN218963864U

CN218963864U - Finishing die for ball bearing shaft sleeve

Info

Publication number: CN218963864U
Application number: CN202223452013.1U
Authority: CN
Inventors: 赵鹏; 李勇; 田红霞
Original assignee: Shandong Weida Machinery Co Ltd
Current assignee: Shandong Weida Machinery Co Ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-05-05
Anticipated expiration: 2032-12-23

Abstract

The utility model relates to the technical field of ball bearing shaft sleeve finishing equipment, in particular to a ball bearing shaft sleeve finishing die which is provided with a lower punch sleeve, a core rod and a middle die plate, wherein a punching groove is arranged on the upper end face of the middle die plate, a lower finishing groove is arranged at the bottom of the punching groove, a lower punching hole is arranged on the middle die plate below the lower finishing groove, the lower punch sleeve is inserted into the lower punch sleeve, the core rod is inserted into the lower punch sleeve, the ball bearing shaft sleeve finishing die is characterized in that an upper two die plates are arranged above the middle die plate, the upper two die plates comprise an upper outer punch, an upper fixing cylinder, an upper inner punch, a limiting cylinder, a supporting pad, a spring and an upper die plate, and a cavity formed after the upper outer punch, the upper inner punch, the lower punch sleeve, the core rod and the middle die plate are mutually matched is a finishing cavity.

Description

Finishing die for ball bearing shaft sleeve

Technical Field

The utility model relates to the technical field of ball bearing shaft sleeve finishing equipment, in particular to a ball bearing shaft sleeve finishing die which is simple in structure, convenient to use, good in finishing effect and high in finishing efficiency.

Background

As is well known, powder metallurgy ball bearing sleeves are conventional products in powder metallurgy parts, and the use amount of the powder metallurgy ball bearing sleeves accounts for more than 30% of the whole electric drill industry, and the design of the powder metallurgy ball bearing sleeves directly affects the quality of the products. Therefore, a reasonable design is very important for the lifetime.

The ball bearing shaft sleeve is used under severe working conditions of high temperature and high rotating speed, the wear resistance is a main factor influencing the service life of the electric drill, and the running stability of the electric drill is reduced due to the increase of the clearance between the inner hole of the ball bearing shaft sleeve and the outer diameter of the output shaft, so that the working efficiency and the machining precision are reduced.

The production process of the ball bearing shaft sleeve adopts the powder metallurgy technology, generally adopts the steps of forming, sintering, finishing and vacuum oil immersion to ensure that the product has enough strength and hardness, and in order to improve the precision of the outer diameter and the inner hole of the ball bearing shaft sleeve, a finishing machine tool with an upper two templates is usually adopted for finishing in a finishing mode after sintering, and in the finishing process, the upper two templates comprise an upper outer punch structure and an upper inner punch structure, and because the upper inner punch structure and the upper outer punch structure need separate actions, the actions of finishing and demoulding of the product can be completed, the stamping mode of the upper two templates has requirements on the actions of the finishing machine tool, and the universality of equipment is limited.

Disclosure of Invention

The utility model aims to solve the defects of the prior art and provides the finishing die for the ball bearing shaft sleeve, which has the advantages of simple structure, convenience in use, good finishing effect and high finishing efficiency.

The technical scheme adopted for solving the technical problems is as follows:

the ball bearing shaft sleeve finishing die is provided with a lower punching sleeve, a core rod and a middle die plate, wherein a punching groove is arranged on the upper end face of the middle die plate, a lower finishing groove is arranged at the bottom of the punching groove, a lower punching hole is arranged on the middle die plate below the lower finishing groove, a lower punching sleeve is inserted into the lower punching hole, the core rod is inserted into the lower punching sleeve, the ball bearing shaft sleeve finishing die is characterized in that an upper die plate is arranged above the middle die plate, the upper die plate comprises an upper outer punch, an upper fixing cylinder, an upper inner punch, a limiting cylinder, a supporting pad, a spring and an upper die plate, the upper die plate is connected with the upper fixing cylinder, the upper fixing cylinder is fixedly provided with the limiting cylinder and the upper outer punch, the limiting cylinder is arranged above the upper outer punch, the lower end of the upper outer punch extends out of the upper fixing cylinder and is inserted into the punching groove, and the lower end face of the upper outer punch is provided with the upper finishing groove, the upper outer punch upper end face be equipped with the spacing groove, be equipped with the punching press hole between last finishing groove and the spacing groove, go up the punching press downthehole upper inner punch that inserts, the upper end side of upper inner punch be equipped with spacing groove complex spacing arch, spacing section of thick bamboo is fixed in last fixed section of thick bamboo between upper outer punch and cope match-plate pattern, the up end of upper inner punch is equipped with down supporting bulge on the lower extreme inner wall of spacing section of thick bamboo with spacing section of thick bamboo's lower terminal surface spacing contact, be equipped with spring and back-up pad in the spacing section of thick bamboo, the upper end of back-up pad is equipped with the upper supporting bulge, the upper supporting bulge is established in the protruding upside of lower supporting bulge, place the spring in the spacing section of thick bamboo of back-up pad's top, the lower extreme of back-up pad contacts with the up end of upper inner punch, last inner punch in be equipped with the plug jack that supplies the plug to insert.

The lower end of the upper fixing cylinder is provided with a lower clamping bulge extending towards the inner side, the outer wall of the upper end of the upper outer punch is provided with an upper clamping bulge protruding towards the outer side, and the upper clamping bulge is arranged on the upper side of the lower clamping bulge so as to realize the fixed and detachable connection of the upper fixing cylinder and the upper outer punch.

The groove depth of the limiting groove is larger than the height of the limiting bulge, and the height of the supporting pad is larger than the height of the lower supporting bulge, so that the supporting pad is driven to punch inwards and move downwards to release the die under the action of the spring.

The height of the upper inner punch is the distance between the finishing upper end surface of the ball bearing shaft sleeve and the lower end surface of the limit sleeve.

The cavity formed by the upper outer punch, the upper inner punch, the lower punch sleeve, the core rod and the middle die plate after the die assembly is mutually finished.

Due to the adoption of the structure, the utility model has the advantages of simple structure, convenient use, good finishing effect, high finishing efficiency and the like.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic structural view of the middle mold plate.

Fig. 3 is a schematic view of the structure of the upper outer punch.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

as shown in the drawing, a finishing die for a ball bearing shaft sleeve is provided with a lower punch sleeve 1, a core rod 2 and an intermediate die plate 3, wherein a punching groove 4 is arranged on the upper end surface of the intermediate die plate 3, a lower finishing groove 5 is arranged at the bottom of the punching groove 4, a lower punching hole is arranged on the intermediate die plate 3 below the lower finishing groove 5, the lower punch sleeve 1 is inserted into the lower punch sleeve 1, the core rod 2 is inserted into the lower punch sleeve 1, the finishing die is characterized in that an upper two die plates are arranged above the intermediate die plate 3, the upper two die plates comprise an upper outer punch 6, an upper fixing cylinder 7, an upper inner punch 8, a limiting cylinder 9, a supporting pad 10, a spring 11 and an upper die plate 12, the upper die plate 12 is connected with the upper fixing cylinder 7, the limiting cylinder 9 and the upper outer punch 6 are fixedly arranged in the upper fixing cylinder 7, the limiting cylinder 9 is arranged above the upper outer punch 6, the lower end of the upper outer punch 6 extends out of the upper fixing cylinder 7 and is inserted into the punching groove 4, the lower end face of the upper outer punch 6 is provided with an upper finishing groove 13, the upper end face of the upper outer punch 6 is provided with a limit groove 14, an upper punching hole is arranged between the upper finishing groove 13 and the limit groove 14, an upper inner punch 8 is inserted into the upper punching hole, the side face of the upper end of the upper inner punch 8 is provided with a limit protrusion 15 matched with the limit groove 14, a limit cylinder 9 is fixed in an upper fixing cylinder 7 between the upper outer punch 6 and an upper template 12, the upper end face of the upper inner punch 8 is in limit contact with the lower end face of the limit cylinder 9, the inner wall of the lower end of the limit cylinder 9 is provided with a lower support protrusion 16, a spring 11 and a support pad 10 are arranged in the limit cylinder 9, the upper end of the support pad 10 is provided with an upper support protrusion 17, the upper support protrusion 17 is arranged on the upper side of the lower support protrusion 16, the spring 11 is placed in the limit cylinder 9 above the support pad 10, the lower end of the support pad 10 is in contact with the upper end face of the upper inner punch 8, the upper inner punch 8 is internally provided with a core rod 2 jack for inserting the core rod 2.

Further, the lower end of the upper fixing barrel 7 is provided with a lower clamping protrusion 18 extending towards the inner side, the outer wall of the upper end of the upper outer punch 6 is provided with an upper clamping protrusion 19 protruding towards the outer side, and the upper clamping protrusion 19 is arranged on the upper side of the lower clamping protrusion 18 to fix and detachably connect the upper fixing barrel 7 and the upper outer punch 6.

Further, the groove depth of the limiting groove 14 is larger than the height of the limiting protrusion 15, and the height of the supporting pad 10 is larger than the height of the lower supporting protrusion 16, so that the supporting pad 10 drives the upper inner punch 8 to move downwards to be demolded under the action of the spring 11.

Further, the height of the upper inner punch 8 is the distance between the finishing upper end face of the ball bearing shaft sleeve and the lower end face of the limit sleeve.

Further, the cavity formed by the upper outer punch 6, the upper inner punch 8, the lower punch sleeve 1, the core rod 2 and the middle die plate 3 after being mutually clamped is a finishing cavity 20.

The upper outer punch 6, the upper fixing cylinder 7, the upper inner punch 8, the limiting cylinder 9, the supporting pad 10 and the spring 11 in the upper two templates are assembled on the upper template 12, the assembly method is that firstly the upper outer punch 6 is inserted into the upper fixing cylinder 7, then the upper inner punch 8 is inserted into the upper outer punch 6, then the limiting cylinder 9 is arranged above the upper outer punch 6, then the supporting pad 10 and the spring 11 are sequentially assembled, then the assembled upper fixing cylinder 7 is fixed on the upper template 12, when in use, the mandrel 2 is connected with a driving mechanism of the lower mandrel 2, the lower punch sleeve 1 is connected with a driving mechanism of the lower punch sleeve 1, the upper template 12 is connected with a driving mechanism of the upper template 12, the ball bearing sleeve is placed in the lower finishing groove 5, the mandrel 2 is driven by the driving mechanism to be inserted into the ball bearing sleeve, then the driving mechanisms of the upper punch sleeve and the upper template 12 are started, the upper punch 6 is inserted into the punching groove 4 in the downward moving process of the upper template 12, the upper half part of the ball bearing shaft sleeve is inserted into the upper finishing groove 13, the upper inner punch 8 moves upwards to be in contact with the lower end face of the limiting cylinder 9, the spring 11 is compressed, the lower punch sleeve 1 and the upper inner punch 8 respectively press finishing the upper end face and the lower end face of the ball bearing, the whole finishing process is completed, after finishing is completed, the upper template 12 moves upwards under the action of the driving mechanism, the spring 11 moves the supporting pad 10 downwards, the supporting pad 10 drives the upper inner punch 8 to move downwards, and finally, the demolding of the ball bearing shaft sleeve is realized, so that finishing and demolding actions are completed by a single template.

Claims

1. The ball bearing shaft sleeve finishing die is provided with a lower punching sleeve, a core rod and a middle die plate, wherein a punching groove is arranged on the upper end face of the middle die plate, a lower finishing groove is arranged at the bottom of the punching groove, a lower punching hole is arranged on the middle die plate below the lower finishing groove, a lower punching sleeve is inserted into the lower punching hole, the core rod is inserted into the lower punching sleeve, the ball bearing shaft sleeve finishing die is characterized in that an upper die plate is arranged above the middle die plate, the upper die plate comprises an upper outer punch, an upper fixing cylinder, an upper inner punch, a limiting cylinder, a supporting pad, a spring and an upper die plate, the upper die plate is connected with the upper fixing cylinder, the upper fixing cylinder is fixedly provided with the limiting cylinder and the upper outer punch, the limiting cylinder is arranged above the upper outer punch, the lower end of the upper outer punch extends out of the upper fixing cylinder and is inserted into the punching groove, and the lower end face of the upper outer punch is provided with the upper finishing groove, the upper outer punch upper end face be equipped with the spacing groove, be equipped with the punching press hole between last finishing groove and the spacing groove, go up the punching press downthehole upper inner punch that inserts, the upper end side of upper inner punch be equipped with spacing groove complex spacing arch, spacing section of thick bamboo is fixed in last fixed section of thick bamboo between upper outer punch and cope match-plate pattern, the up end of upper inner punch is equipped with down supporting bulge on the lower extreme inner wall of spacing section of thick bamboo with spacing section of thick bamboo's lower terminal surface spacing contact, be equipped with spring and back-up pad in the spacing section of thick bamboo, the upper end of back-up pad is equipped with the upper supporting bulge, the upper supporting bulge is established in the protruding upside of lower supporting bulge, place the spring in the spacing section of thick bamboo of back-up pad's top, the lower extreme of back-up pad contacts with the up end of upper inner punch, last inner punch in be equipped with the plug jack that supplies the plug to insert.

2. The finishing die for the ball bearing shaft sleeve according to claim 1, wherein the lower end of the upper fixing cylinder is provided with a lower clamping protrusion extending towards the inner side, the outer wall of the upper end of the upper outer punch is provided with an upper clamping protrusion protruding towards the outer side, and the upper clamping protrusion is arranged on the upper side of the lower clamping protrusion to realize the fixing and detachable connection of the upper fixing cylinder and the upper outer punch.

3. The finishing die for the ball bearing shaft sleeve according to claim 1, wherein the groove depth of the limiting groove is larger than the height of the limiting protrusion, and the height of the supporting pad is larger than the height of the lower supporting protrusion, so that the supporting pad drives the upper inner punch to move downwards for demolding under the action of the spring.

4. The finishing die for the ball bearing shaft sleeve according to claim 1, wherein the upper inner punch is characterized in that the distance between the finishing upper end surface of the ball bearing shaft sleeve and the lower end surface of the limit sleeve is equal.

5. The finishing die for the ball bearing shaft sleeve according to claim 1, wherein the cavity formed after the upper outer punch, the upper inner punch, the lower punch sleeve, the core rod and the middle die plate are mutually matched is a finishing cavity.