CN115301979A

CN115301979A - Piston pin drilling tool

Info

Publication number: CN115301979A
Application number: CN202210882275.7A
Authority: CN
Inventors: 王智勇; 叶扬; 孙超
Original assignee: Jinan Zhongchuan Equipment Co ltd
Current assignee: Jinan Zhongchuan Equipment Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-11-08
Anticipated expiration: 2042-07-25
Also published as: CN115301979B

Abstract

The invention provides a piston pin drilling tool which comprises a V-shaped supporting assembly, a gland assembly, a workpiece positioning pin, a die supporting plate and a die plate seat, wherein the V-shaped supporting assembly is arranged on the die plate seat; a piston pin is placed on the V-shaped supporting assembly, and the gland assembly is matched with the workpiece positioning pin and positioned on the V-shaped supporting assembly; the die supporting plate is matched with the gland assembly through a shaft pin and is connected with the die plate seat through a rotating shaft; the template base is provided with a plurality of drill bushings which are arranged in a straight line, and when the template base works, the drilling tool drills the piston pin through the drill bushings. After the tool is adopted, the working procedures of marking, proofing, punching and the like during drilling are omitted, and the problem of low production efficiency is solved. At present, the tool can be used for drilling 80 piston pins per shift, so that the production cost is reduced. Through the cooperation of the gland assembly, the workpiece positioning pin and the die supporting plate, the piston pin can be quickly and rotationally positioned, and the production efficiency is improved.

Description

Piston pin drilling tool

Technical Field

The invention relates to the technical field of tool fixtures, in particular to a piston pin drilling tool.

Background

In the ship manufacturing industry, an engine is provided with a part called a piston pin, which is a cylindrical pin arranged at the piston group part, the middle part of the piston pin penetrates through a small end hole of a connecting rod to be used for connecting the piston and the connecting rod, and the gas acting force born by the piston is transmitted to the connecting rod through the piston pin. Fig. 1 and 2 show a piston pin for a certain type of engine. Three holes are arranged on each of the three bus bars of the piston pin and are used for passing through lubricating oil, so that the piston pin and the connecting rod are fully lubricated. How to rapidly machine the 9 holes is a first problem to be solved.

In the prior art, when a piston pin is used for machining 9 holes, processes of marking, proofing, punching and drilling are adopted. By adopting the process, only 10 pieces can be produced per shift, the production efficiency is very low, and the competitiveness is completely lost.

Disclosure of Invention

The invention provides a piston pin drilling tool which is used for solving the problem of low production efficiency in the prior art.

In order to realize the purpose, the invention adopts the following technical scheme:

the invention provides a piston pin drilling tool in a first aspect, which comprises a V-shaped supporting assembly, a gland assembly, a workpiece positioning pin, a die supporting plate and a die plate seat;

a piston pin is placed on the V-shaped supporting assembly, and the gland assembly is matched with the workpiece positioning pin and positioned on the V-shaped supporting assembly;

the die supporting plate is matched with the gland assembly through a shaft pin and is connected with the die plate seat through a rotating shaft;

the template base is provided with a plurality of drill bushings which are arranged in a straight line, and when the template base works, the drilling tool drills the piston pin through the drill bushings.

Further, the V-shaped supporting assembly comprises a bottom plate and pressing strips, the two pressing strips are mounted on the bottom plate, and the pressing strips and the bottom plate form the V-shaped supporting assembly for supporting the piston pin.

Further, the gland assembly comprises a left end gland, a right end gland, short stud bolts, long stud bolts, a handle and an opening gasket;

the die supporting plate is tightly attached to the left end press cover, a hole for connecting the short stud is formed in the middle of the die supporting plate, and the right end of the short stud is screwed into a threaded hole formed in the center of the left end press cover;

one end of the handle is fixed with the die supporting plate, and the other end of the handle is provided with an open gasket which is screwed and fixed by a nut;

the left end of the long stud bolt penetrates through the center hole of the piston pin and then is screwed into the threaded hole of the left end gland, and the right end of the long stud bolt is connected with the right end gland, the handle, the opening washer and the nut;

the left end gland and the right end cover plate are clamped at two ends of the piston pin.

Furthermore, the left end gland is in a disc shape, a threaded hole is formed in the center of the left end gland, a plurality of positioning holes are formed in the left end gland, a plurality of positioning openings for indexing and positioning are formed in the circumferential direction of the outer circle, and at least one positioning opening is matched with the workpiece positioning pin for positioning.

Further, a boss is arranged on one end face of the left end pressing cover and is matched and positioned with the left end of the center hole of the piston pin.

Furthermore, a through hole is formed in the center of the die supporting plate, at least two pin holes matched with the positioning holes in the left end press cover are formed in the die supporting plate, and the pin holes are matched with the positioning holes through shaft pins; the shaft pin is fixed in the pin hole and the positioning hole through a set screw.

Furthermore, a boss is arranged on one end face of the right end gland, and the boss is matched and positioned with the right end of the center hole of the piston pin.

Furthermore, a reinforcing seat is fixed on the side face of the top of the die supporting plate and is fixed with the die plate seat through a taper pin.

Further, the drill bushing is fixed in the template seat through the assistance of a screw.

Furthermore, one of the pressing strips is fixed on the bottom plate through a bolt, and the other pressing strip is fixed on the bottom plate through a taper pin.

The effects provided in the summary of the invention are only the effects of the embodiments, not all of the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:

1. after the tool is adopted, the working procedures of marking, proofing, punching and the like during drilling are omitted, and the problem of low production efficiency is solved. At present, the tool can be used for drilling 80 piston pins per shift, so that the production cost is reduced.

2. Through the cooperation of the gland assembly, the workpiece positioning pin and the die supporting plate, the piston pin can be quickly rotated and positioned, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments or prior art solutions of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is an axial sectional view of a piston pin.

FIG. 2 is a radial sectional view of the piston pin.

Fig. 3 is a view of the overall structure of the present invention.

Fig. 4 is a left side view (partially cut away) of the present invention.

Fig. 5 is a partially enlarged view of a in fig. 3.

Fig. 6 is a partially enlarged view of B in fig. 3.

Fig. 7 is a plan view of the V-shaped support member.

Fig. 8 is a cross-sectional view of the step of fig. 7.

Fig. 9 is a top view of the bead.

Fig. 10 is a cross-sectional view of the bead.

FIG. 11 is a structural view of the connection of the mold support plate to the reinforcement plate.

Fig. 12 is a left side view of fig. 11.

Fig. 13 is a left side view of the left end gland.

Figure 14 is a cross-sectional view of the left end gland.

Fig. 15 is a structural view of a short stud bolt.

Fig. 16 is a structural view of a long stud bolt.

Fig. 17 is a left side view of the right end gland.

Figure 18 is a half cross-sectional view of the right end gland.

Fig. 19 is a structural view of the shoe.

FIG. 20 is a top view of a drill sleeve.

Fig. 21 is a cross-sectional view of the drill bit.

Fig. 22 is a structural view of the handle.

Fig. 23 is a structural view of the taper pin.

Fig. 24 is a structural view of a workpiece positioning pin.

01. Positioning pins; 02. a base plate; 03. a workpiece positioning pin; 04. layering; 05. a short stud bolt; 06. an open washer; 07. a handle; 08. a mold support plate; 09. a shaft pin; 10. a reinforcement seat; 11. a rotating shaft; 12. a left end gland; 13. a stencil holder; 14. a long stud bolt; 15. drilling a sleeve; 16. a right end gland; 17. tightening the screw; 18. a screw; 19. a piston pin; 20, a nut; 21 taper pin; 22 a conical pin; 23 countersunk head bolts; 24 positioning holes, 25 positioning notches and 26 umbilicus.

Detailed Description

In order to clearly explain the technical features of the present invention, the present invention will be explained in detail by the following embodiments and the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily limit the invention.

The piston pin drilling tool comprises a V-shaped supporting assembly, a gland assembly, a workpiece positioning pin, a die supporting plate 08 and a die plate seat 13.

As shown in fig. 3 and 4, specifically, the piston pin 19 is placed on the V-shaped support assembly, and the gland assembly is positioned on the V-shaped support assembly in cooperation with the workpiece positioning pin. Two of the compression beads are mounted on the bottom plate, and the compression beads and the bottom plate form a V-shaped support assembly for supporting the piston pin 19.

As shown in fig. 7 and 8, the V-shaped support assembly includes a base plate 02 and a pressing bar 04, the base plate 02 is a long flat plate, and a hole for installing a positioning pin 01 and a hole for installing a workpiece positioning pin 03 (fig. 24) are formed in the center of the base plate 02. At least one row of threaded holes for mounting the pressing strips 04 are correspondingly formed in the front side or the rear side of the base plate 02, at least one pressing strip 04 is mounted on the base plate 02 through bolts, and the pressing strip 04 on the other side is mounted on the base plate 02 through bolts or taper pins 22. For example, the first mounting method: a row of threaded holes are formed in the rear side of the base plate 02, a row of taper holes are formed in the front side of the base plate 02, one pressing strip 04 is installed on the base plate 02 through a bolt matched threaded hole, and the other pressing strip 04 is installed on the base plate 02 through a taper pin 22. In the second installation mode, threaded holes are formed in the front side and the rear side of the base plate 02, and the two pressing strips 04 can be installed through bolts matched with bolt holes. Compared with the second installation mode, the first installation mode of the pressing strip 04 is quicker to install and disassemble. Corresponding to the first installation mode, a stepped hole for installing a bolt is formed in the position, corresponding to the threaded hole in the base plate 02, of one pressing strip 04, and the countersunk head bolt 23 is embedded into the stepped hole; the other pressing strip 04 is provided with a taper hole for mounting the taper pin 22 corresponding to the taper hole on the bottom plate 02. Corresponding to the second installation mode, stepped holes for installing bolts are formed in the positions, corresponding to the threaded holes in the base plate 02, of the two pressing strips 04, and the countersunk head bolts 23 are embedded in the stepped holes.

As shown in fig. 9 and 10, one surface of the compression beads 04 is an inclined surface, and after the two compression beads 04 are mounted on the base plate 02, the two inclined surfaces are opposite to each other to form a V-shaped supporting manner for supporting the piston pin 19.

As shown in fig. 11 and 12, the mold supporting plate 08 is engaged with the capping assembly through a shaft pin 09 and is connected to the mold plate holder 13 through a rotating shaft 11. The gland assembly includes a left end gland 12, a right end gland 16, short studs 05, long studs 14, a handle 07 and a split washer 06. The mold support plate 08 is a long strip plate, which is tightly attached to the outer side (left side) of the left end press cover 12, and a hole for connecting the short stud is provided in the middle of the mold support plate 08, and the hole is a through hole through which the short stud 05 passes. The right end of the short stud bolt passes through the die supporting plate 08 and then is screwed into a threaded hole formed in the center of the left end pressure cover 12. The left end of the short stud bolt 05 passes through the die supporting plate 08 and the handle 07 and then is screwed and fixed through the nut 20 and the split washer 06.

The right end of the handle 07 is welded and fixed with the die supporting plate 08, and the other end of the handle 07 is screwed and fixed at the left end position of the short stud bolt 05 (fig. 15) through a nut 20 and an open washer 06. That is, the handle 07 is fixed integrally with the mold support plate 08 while being tightly pressed against the left side face of the left end cover 12 by the nut 20 in cooperation with the split washer 06 and the short stud 05.

As shown in fig. 13 and 14, the left end cover 12 has a disk shape, and a threaded hole is formed in the center of the left end cover 12 and is used for connecting the right end of the end stud bolt and the left end of the long stud bolt 14 (fig. 16). The left end press cover 12 is provided with a plurality of positioning holes 24 matched with the die supporting plate 08; the center of the die supporting plate 08 is provided with a through hole, the die supporting plate 08 is provided with two pin holes matched with the positioning holes 24 on the left end pressure cover 12, and the pin holes on the die supporting plate 08 are aligned with the positioning holes 24 on the left end pressure cover 12 and then inserted into the shaft pin 09. The axle pin 09 is secured in the pin hole and the positioning hole 24 by a set screw 17.

The left end gland 12 is provided with a plurality of positioning openings 25 for indexing and positioning along the circumferential direction of the excircle, and the number of the social positioning openings 25 and the included angle between two adjacent positioning openings 25 are required according to the processing requirement of the processed piece, namely the hole of the piston pin 19. When the positioning device is used specifically, at least one positioning notch 25 is matched with the workpiece positioning pin for positioning. The bottom of the workpiece positioning pin is arranged on the bottom plate 02, and the top of the workpiece positioning pin is matched with the positioning notch 25 to realize the positioning of the left end gland 12.

One end surface of the left end gland 12 is provided with a convex umbilicus 26, and the convex umbilicus 26 is matched and positioned with the left end of the central hole of the piston pin 19, and a small gap is arranged between the convex umbilicus 26 and the left end.

The left end of the long stud bolt 14 passes through the center hole of the piston pin 19 and then is screwed into the threaded hole of the left end gland 12, and the right end of the long stud bolt 14 is connected with the right end gland 16, the handle 07 (shown in figure 22), the opening washer 06 and the nut.

As shown in fig. 17 and 18, the right end cover 16 also has a boss 26, and the boss 26 is positioned to fit the right end of the center hole of the piston pin 19 with a small gap therebetween. The center of the right end gland 16 is provided with a through hole for penetrating the long double-ended bolt 14. The right-hand end cover 16 likewise bears against the right-hand end face of the piston pin 19 by means of the handle 07, the split washer 06 and the nut. This provides an arrangement in which the left end gland 12 and the right end cover plate are clamped to the ends of the piston pin 19. The right end of the long stud bolt 14 is provided with a part for fixing the piston pin 19 together through the left end press cover 12 before drilling. After the left and right end accessories are completely installed, the piston pin 19 can be placed on the V-shaped supporting assembly to wait for drilling.

As shown in fig. 19, the mold plate base 13 is a long plate, on which several drill bushings 15 (fig. 20, 21) are mounted in a line, and the drill bushings 15 are fixed in the mold plate base 13 by screws 18. That is, the screw 18 presses the drill sleeve 15 (fig. 6) to ensure that it is securely mounted in the pattern plate holder 13.

In operation, the drilling tool drills the piston pin 19 through the drill bushing 15. Which is installed on a mold supporting plate 08, and the mold supporting plate 08 is connected with a mold plate base 13 through a rotating shaft 11. In use, the template base 13 is positioned above the piston pin 19, and the drill bushing 15 is installed at a position corresponding to a position of a hole to be machined in the piston pin 19.

For the purpose of stability, a reinforcing base 10 is fixed to the top side of the mold support plate 08, and the reinforcing base 10 is fixed to the mold base 13 by a taper pin 21 (fig. 23) (fig. 5). The reinforcing seat 10 can be welded on the left side surface of the top of the die supporting plate 08, taper holes are processed on the reinforcing seat 10 and the die plate seat 13, and the taper pin 21 is inserted into the taper holes to connect the reinforcing seat 10 and the die plate seat 13, so that the mounting and the dismounting are convenient.

The working principle is as follows:

the base plate 02 is fixed on a workbench of a drilling machine and can be positioned by a positioning pin and a trapezoidal groove of the drilling machine, a piston pin 19 is fixed by a left end press cover 12, a long stud 14, a short stud 05, a handle 07, a nut, a die supporting plate 08, a die plate seat 13 and the like, three holes of the same bus of the piston pin 19 are drilled on a V-shaped supporting assembly, after the three holes are drilled, the nut at the left end of the left end press cover 12 is loosened, an opening gasket 06 is drawn out, the die supporting plate 08 is pulled out, a shaft pin 09 is taken out, the die supporting plate 08, the handle 07 and the shaft pin 120 are rotated, the shaft pin 09 on the die supporting plate 08 is inserted into the other two positioning holes 24 of the left end press cover 12 and is separated by 120 degrees from the last positioning hole 24, the opening gasket 06 is in place, the nut is screwed, the handle 07 is respectively held by a left hand and a right hand, the piston pin 19 is moved to the right, the positioning pin is separated from a notch on the excircle of the left end press cover 12, the positioning pin 19 is moved to the left side after the positioning pin is rotated by 120 degrees, the positioning pin is inserted into the notch on the excircle of the left end press cover 12 and the excircle until the left end and the right end is consistent with the left end and the right end. The drilling of three holes of the other generatrix of the piston pin 19 is continued. And repeating the actions in a circulating way until all the holes on the piston pin 19 are drilled, loosening the nuts at the side of the right-end handle 07, taking down the split washer 06 and the right-end gland 16, holding the left-end handle 07 by the left hand, drawing out all parts from the center hole of the piston pin 19 leftwards, removing the piston pin 19 with the drilled holes, replacing the next part, and repeating the actions.

The tool is suitable for the piston pin 19 no matter three rows of through holes or blind holes are uniformly distributed on the excircle. When four rows of radial holes are distributed on the excircle of some piston pins 19, only the number of the pin holes of the left end gland 12 and the number of the openings on the excircle are changed into four.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive changes in the technical solutions of the present invention.

Claims

1. A piston pin drilling tool is characterized by comprising a V-shaped supporting assembly, a gland assembly, a workpiece positioning pin, a die supporting plate and a die plate seat;

2. The piston pin drilling tool according to claim 1, wherein the V-shaped supporting assembly comprises a bottom plate and pressing strips, two pressing strips are mounted on the bottom plate, and the pressing strips and the bottom plate form a V-shaped supporting assembly for supporting a piston pin.

3. The piston pin drilling tool of claim 1, wherein the gland assembly comprises a left end gland, a right end gland, short studs, long studs, a handle, and a split washer;

one end of the handle is fixed with the mold supporting plate, and the other end of the handle is provided with an opening gasket which is screwed and fixed by a nut;

the left end gland and the right end cover plate are tightly clamped at two ends of the piston pin.

4. The piston pin drilling tool as claimed in claim 3, wherein the left end pressing cover is in a shape of a circular plate, a threaded hole is formed in the center of the left end pressing cover, a plurality of positioning holes are formed in the left end pressing cover, a plurality of positioning notches for indexing and positioning are formed in the outer circumferential direction of the left end pressing cover, and at least one positioning notch is matched with the workpiece positioning pin for positioning.

5. The piston pin drilling tool as claimed in claim 4, wherein a boss is arranged on one end face of the left end gland, and the boss is matched with and positioned at the left end of the central hole of the piston pin.

6. The piston pin drilling tool as claimed in claim 4, wherein a through hole is formed in the center of the die supporting plate, at least two pin holes matched with the positioning holes in the left end press cover are formed in the die supporting plate, and the pin holes are matched with the positioning holes through shaft pins; the shaft pin is fixed in the pin hole and the positioning hole through a set screw.

7. The piston pin drilling tool according to claim 3, wherein a boss is arranged on one end face of the right end pressing cover and is matched and positioned with the right end of the center hole of the piston pin.

8. The piston pin drilling tool as claimed in claim 1 or 4, wherein a reinforcing seat is fixed on the side surface of the top of the die supporting plate, and the reinforcing seat is fixed with the die plate seat through a taper pin.

9. The piston pin drilling tool as claimed in claim 1, wherein the drill sleeve is fixed in the template base by means of a screw.

10. The piston pin drilling tool as claimed in claim 2, wherein one of the pressing strips is fixed on the base plate through a bolt, and the other pressing strip is fixed on the base plate through a taper pin.