CN218081536U

CN218081536U - Large-diameter cylindrical part radial symmetrical hole machining tool

Info

Publication number: CN218081536U
Application number: CN202222030865.5U
Authority: CN
Inventors: 韦晓梅
Original assignee: Zhengmao Group Co ltd
Current assignee: Zhengmao Group Co ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2022-12-20
Anticipated expiration: 2032-08-03

Abstract

The utility model discloses a radial symmetry hole processing frock of major diameter drum spare, including V type piece and alignment square plate, V type groove face contained angle alpha of V type piece is 90, 90 bight is equipped with and link up the logical groove of the fore-and-aft rectangle of V type piece, and elastic locating pin mechanism sets up in the one end that the rectangle led to the groove. The large-diameter cylindrical part is supported in a V-shaped groove of a V-shaped block, the bottom surface of the V-shaped block is supported on a guide rail of the flat tongs, and two ends of the large-diameter cylindrical part are clamped and fixed between two jaws of the flat tongs. When the alignment square plate is placed into the V-shaped groove for alignment, an end face mark line led out from the axis of a first radial hole at the highest position of the excircle of the large-diameter cylindrical part supported by the V-shaped block aligns with one corner of the upper end of the alignment square plate. The utility model discloses showing the straightness tolerance precision of hanging down of degree of symmetry tolerance, axiality tolerance and the radial hole axis to connecting cylinder axis that has improved a pair of radial hole, processingquality obtains obviously improving, has improved machining efficiency simultaneously, has reduced the processing cost.

Description

Large-diameter cylindrical part radial symmetrical hole machining tool

Technical Field

The utility model relates to a drilling processing frock, in particular to special frock that is used for radial symmetry hole on major diameter (external diameter phi is more than or equal to 150 mm) drum spare belongs to metal cutting processing technology field.

Background

The connecting cylinder is an important part of the weighing electronic weighing apparatus, as shown in fig. 1, the connecting cylinder 10 is a large-diameter cylindrical part with a step-shaped through hole in the center, two symmetrical threaded holes 101 are formed in the excircle of the upper end of the connecting cylinder, and the symmetry and the coaxiality of a pair of threaded holes 101 and the verticality of the axis of the threaded hole 101 to the axis of the connecting cylinder are high. Because the outer diameter of the connecting cylinder exceeds the application range of the dividing head, if the connecting cylinder is firstly scribed and then holes are sequentially drilled according to the scribed central line of the threaded bottom hole, the scribing workload is large, the work efficiency is low, and the form and position tolerance requirements of the radially symmetrical holes of the connecting cylinder cannot be ensured.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, processing are convenient and can satisfy the radial symmetry spot facing work frock of major diameter drum spare that radial symmetry hole shape tolerance required.

The utility model discloses a following technical scheme realizes:

a symmetrical radial hole machining tool for a large-diameter cylindrical part comprises a V-shaped block and an alignment square plate, wherein an included angle alpha of a V-shaped groove surface of the V-shaped block is 90 degrees, a rectangular through groove which penetrates through the V-shaped block in the longitudinal direction is formed in the 90-degree corner, and an elastic positioning pin mechanism is arranged in one end of the rectangular through groove; the large-diameter cylindrical part is supported in a V-shaped groove of a V-shaped block, the bottom surface of the V-shaped block is supported on a guide rail of the flat tongs, and two ends of the large-diameter cylindrical part are clamped and fixed between two jaws of the flat tongs; when the alignment square plate is placed into the V-shaped groove for alignment, an end face mark line led out from the axis of a first radial hole at the highest position of the excircle of the large-diameter cylindrical part supported by the V-shaped block aligns with one corner of the upper end of the alignment square plate, and the distance between the one corner of the upper end and a bus at the highest position of the excircle of the large-diameter cylindrical part is H = 8-12 mm.

The object of the invention is further achieved by the following technical measures.

Furthermore, the bottom surface of the V-shaped block is provided with a sinking groove, the sinking groove is embedded on a guide rail seat of the flat tongs clamping two ends of the large-diameter cylindrical part, and the sinking groove is in clearance fit with the guide rail of the flat tongs.

Furthermore, the elastic positioning pin mechanism comprises a positioning pin sleeve, a positioning pin, a pressure spring and an adjusting stud, the positioning pin sleeve is of a sleeve structure, a threaded pipe at the lower end of the positioning pin sleeve is screwed into one end of the rectangular through groove, and the lower end of the positioning pin is embedded into a counter bore of the positioning pin sleeve; the pressure spring is positioned between the positioning pin counter bore and the positioning pin sleeve counter bore, the adjusting stud is screwed into the bottom of the positioning pin sleeve, and the end head of the upper end of the adjusting stud abuts against the lower end of the pressure spring; the upper end of the positioning pin is in clearance fit with the symmetrical hole of the large-diameter cylindrical part, and the lower end of the positioning pin is in clearance fit with the counter bore of the positioning pin sleeve.

Further, the difference between the length L of the diameter cylindrical member and the length L1 of the V-block: L-L1=5mm to 10mm.

The utility model discloses a V type piece of 90V type groove face supports major diameter drum spare, utilizes the first radial hole's of alignment square plate alignment major diameter drum spare of vertical support in 90V type groove face axis, after accomplishing the drilling of first radial hole, rotates 180 with major diameter drum spare around its axis, and first radial hole cover is in the locating pin, can directly drill a second radial hole, the utility model discloses showing and having improved the axiality tolerance and the straightness tolerance requirement that hangs down of radial hole axis to connecting cylinder axis of a pair of radial hole to the symmetry tolerance of major diameter drum spare axis, a pair of radial hole, processingquality obtains obviously improving, has improved machining efficiency simultaneously, has reduced the processing cost.

The advantages and features of the invention will be illustrated and explained by the following non-restrictive description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings.

Drawings

FIG. 1 is a cross-sectional view of a connector barrel;

FIG. 2 is a front view of the V-block;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a schematic view of the use of the present invention for machining symmetrical radial holes in large diameter cylindrical parts;

fig. 5 is an enlarged view of a portion i of fig. 4.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples for machining symmetrical holes of a 20 ton wagon balance connecting cylinder.

As shown in fig. 2 to 5, the present embodiment includes a V-shaped block 1 and an alignment square plate 2, an included angle α between V-shaped groove surfaces of the V-shaped block 1 is 90 °, a rectangular through groove 11 penetrating through the V-shaped block 1 in the longitudinal direction is provided at a 90 ° corner, and an elastic positioning pin mechanism 3 is provided in one end of the rectangular through groove 11. The connecting cylinder 10 is supported in a V-shaped groove 12 of the V-shaped block, a sinking groove 13 is formed in the bottom surface of the V-shaped block 1, the sinking groove 13 is embedded in flat tongs guide rails 201 at two ends of the connecting cylinder 10, and the sinking groove 13 is in clearance fit with the flat tongs guide rails 201, so that the V-shaped block 1 is accurately positioned on the flat tongs guide rails 201. The connecting cylinder 10 is held between the two jaws of the flat-nose pliers 20 at both ends.

When the alignment square plate 2 is placed into the V-shaped groove 12 for alignment, an end face mark line 102 led out from the axis of a first threaded bottom hole 101A at the highest position of the excircle of the connecting cylinder 10 supported by the V-shaped block aligns with one corner 21 at the upper end of the alignment square plate 2, and the distance H =8 mm-12 mm between the upper corner 21 and a bus at the highest position of the excircle of the large-diameter cylindrical piece 10. The utility model discloses utilize the square to rotate the geometric characteristics that the diagonal behind 45 is the plumb line for the upper end one corner 21 that is arranged in the alignment square plate 2 in V type groove 12 can be used for rectifying the axis that the connecting cylinder 10 will want the first screw thread bottom hole 101 of drilling, and the precision height is just adjusted very conveniently.

Difference between length L of the large-diameter cylindrical member and length L1 of the V-shaped block: L-L1=5 mm-10 mm, which is convenient for the flat-nose pliers 20 to clamp the connecting cylinder 10.

The elastic positioning pin mechanism 3 comprises a positioning pin sleeve 31, a positioning pin 32, a pressure spring 33 and an adjusting stud 34, the positioning pin sleeve 31 is of a sleeve structure, a lower end threaded pipe 311 of the positioning pin sleeve 32 is screwed into one end of the rectangular through groove 11, and the lower end of the positioning pin 32 is embedded into a positioning pin sleeve counter bore 312. The compression spring 33 is located between the positioning pin counter bore 321 and the positioning pin sleeve counter bore 312, the adjusting stud 34 is screwed into the bottom of the positioning pin sleeve 31, and the end head of the upper end of the adjusting stud 34 abuts against the lower end of the compression spring 33. The upper end of the positioning pin 32 is in clearance fit with the drilled threaded bottom hole 101A of the connecting cylinder, and the lower end of the positioning pin 32 is in clearance fit with the inner hole of the positioning pin sleeve 31. The adjusting stud 3 is used for adjusting the depth of the positioning pin 32 extending into the first threaded bottom hole 101A and the magnitude of the resetting force of the compression spring 33, so that the positioning connection of the positioning pin 32 to the connecting cylinder 10 is ensured.

Use the utility model discloses a process of a pair of screw bottom hole 101A of drilling on connecting cylinder 10 is as follows:

1) Firstly, the elastic positioning pin mechanism 3 is installed in one end of the rectangular through groove 11 of the V-shaped block 1, the upper end of the positioning pin 32 extends out of the positioning pin sleeve 31, and then the sunk groove 13 on the bottom surface of the V-shaped block 1 is embedded on the flat tongs guide rail 201 on the rocker drill workbench, so that the installation of the V-shaped block 1 is completed.

2) Next, the connecting cylinder 10 is placed on the V-shaped block 1, one end of the connecting cylinder 10 is pressed down by the positioning pin 32, and then a lower corner of the alignment square plate 3 is embedded into the V-shaped groove 12 of the V-shaped block 1, and one side surface of the alignment square plate 3 abuts against the end surface of the connecting cylinder 10. The connector barrel 10 is rotated so that the end face marking line 102 of the connector barrel 10 is aligned with the upper corner point of the alignment square plate 3. The flat tongs are then clamped to the connector barrel 10 and the square plate 3 and the rocker arm of the rocker drill is then rotated with the drill point aligned with the cross centre line of the threaded bottom hole 101A marked in the connector barrel 10. The rocker arm is locked and remains in a locked state in the subsequent drilling, and then the rocker arm drill is started to complete the drilling of the first threaded bottom hole 101A on the connecting cylinder 10.

3) The flat tongs 20 are loosened, the alignment square plate 3 is taken down, then the connecting cylinder 10 is rotated 180 degrees around the axis thereof, the positioning pin 32 is made to pop into the first threaded bottom hole 101A, the rocker arm drill can be started, and the drilling of the second threaded bottom hole 101A which is symmetrical to the first threaded bottom hole 101A is completed.

The utility model discloses only need the cross central line of drawing on major diameter drum spare outer peripheral face, can drill out two radial holes that the symmetry set up on major diameter drum spare outer peripheral face, another radial hole need not to draw the line and can directly drill out, and two radial holes become the symmetry with major diameter drum spare axis and set up, has improved the precision of the straightness tolerance of hanging down of two radial hole axes and major diameter drum spare axis and the axiality tolerance of two radial hole axes. The processing saves time and labor, and obviously improves the processing efficiency and the processing quality.

In addition to the above embodiments, the present invention can also have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. The tool for processing the radial symmetrical holes of the large-diameter cylindrical part is characterized by comprising a V-shaped block and an alignment square plate, wherein the included angle alpha of the V-shaped groove surface of the V-shaped block is 90 degrees, a rectangular through groove which penetrates through the V-shaped block longitudinally is arranged at the corner of the 90 degrees, and an elastic positioning pin mechanism is arranged in one end of the rectangular through groove; the large-diameter cylindrical part is supported in a V-shaped groove of a V-shaped block, the bottom surface of the V-shaped block is supported on a guide rail of the flat tongs, and two ends of the large-diameter cylindrical part are clamped and fixed between two jaws of the flat tongs; when the alignment square plate is placed into the V-shaped groove for alignment, an end face mark line led out from the axis of a first radial hole at the highest position of the excircle of the large-diameter cylindrical part supported by the V-shaped block aligns with one corner of the upper end of the alignment square plate, and the distance between the one corner of the upper end and a bus at the highest position of the excircle of the large-diameter cylindrical part is H = 8-12 mm.

2. The large-diameter cylindrical part radial symmetry hole machining tool according to claim 1, wherein the bottom surface of the V-shaped block is provided with a sinking groove, the sinking groove is embedded in a guide rail of a flat tongs clamping two ends of the large-diameter cylindrical part, and the sinking groove is in clearance fit with the guide rail of the flat tongs.

3. The tool for machining the radial symmetrical holes of the large-diameter cylindrical part according to claim 1, wherein the elastic positioning pin mechanism comprises a positioning pin sleeve, a positioning pin, a pressure spring and an adjusting stud, the positioning pin sleeve is of a sleeve structure, a lower end threaded pipe of the positioning pin sleeve is screwed into one end of the rectangular through groove, and the lower end of the positioning pin is embedded into a counter bore of the positioning pin sleeve; the pressure spring is positioned between the positioning pin counter bore and the positioning pin sleeve counter bore, the adjusting stud is screwed into the bottom of the positioning pin sleeve, and the end head of the upper end of the adjusting stud abuts against the lower end of the pressure spring; the upper end of the positioning pin is in clearance fit with the symmetrical hole of the large-diameter cylindrical part, and the lower end of the positioning pin is in clearance fit with the counter bore of the positioning pin sleeve.

4. The tool for machining the radially symmetrical hole in the large-diameter cylindrical part according to claim 1, wherein the difference between the length L of the large-diameter cylindrical part and the length L1 of the V-shaped block is as follows: L-L1=5mm to 10mm.