CN219561519U

CN219561519U - Drilling and positioning clamp for disc workpiece

Info

Publication number: CN219561519U
Application number: CN202320138899.8U
Authority: CN
Inventors: 郑小兵; 冷国军
Original assignee: GUIZHOU HUIXIN TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: GUIZHOU HUIXIN TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2023-02-06
Filing date: 2023-02-06
Publication date: 2023-08-22
Anticipated expiration: 2033-02-06

Abstract

The utility model relates to the technical field of railway part machining, and particularly discloses a disc workpiece drilling and positioning clamp which comprises a positioning clamp for positioning a piston disc and a drilling platform for placing the piston disc, wherein adjusting holes uniformly distributed along the circle center of the positioning clamp are formed in the periphery of the positioning clamp, adjusting bolts are arranged in the adjusting holes, the inner side of the upper surface of the positioning clamp is propped against the top surface of the piston disc, and positioning holes uniformly distributed along the circle center of the positioning clamp are formed in the upper surface of the positioning clamp. The purpose of this patent is to solve the piston disc at drilling in-process, and drilling location is more troublesome, influences the problem of drilling efficiency.

Description

Drilling and positioning clamp for disc workpiece

Technical Field

The utility model relates to the technical field of railway part machining, in particular to a positioning clamp for drilling a disc workpiece.

Background

In the running process of the railway vehicle, a braking system is required to brake the running train so as to realize the speed reduction or stop running of the train and ensure the running safety. The braking system generally comprises the following parts: the brake valve, the brake cylinder and the brake shoe press the tread (or the brake disc) of the wheel through the lever action in the basic brake device to block the rotation of the wheel, thereby braking the train.

The brake piston is one of important parts in the brake cylinder, a piston rod is connected to the lower end face of the disc-shaped piston disc, and when the brake cylinder works, gas enters the brake cylinder and pushes the piston disc to move, so that the piston rod is pushed out horizontally.

The prior brake piston structure is shown in figure 5, the top of the piston is provided with a raised reinforcing part, the outer edge of the reinforcing part is a drilling part, a step is formed between the reinforcing part and the drilling part, the top of the piston is a disc-shaped piston disc, the drilling part of the piston disc is often required to be drilled with a plurality of threaded holes, and the threaded holes are used for later installation of a spiral spring. The position of the drilling hole needs to be positioned on the surface of the piston disc before drilling, so that larger errors are avoided during drilling, the traditional method is to use a die to draw a positioning hole on the surface of the piston disc and then use a bench drill to drill, but the traditional method is troublesome to drill, when the positioning hole is drawn, once the die is misplaced, line drawing errors are caused, deviation occurs during drilling, deviation occurs between the mounting positions of the follow-up threaded hole and the spiral spring, matching with other parts is impossible, the universality of the parts is damaged, and the piston disc is scrapped.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a positioning clamp for drilling a disc workpiece, which solves the problems that in the drilling process of a piston disc, the drilling positioning is easy to generate errors and the yield of the piston disc is reduced.

In order to solve the problems, the utility model adopts the following technical scheme:

the utility model provides a disc work piece boring grab, includes the positioning fixture of positioning piston dish and the drilling platform of placing the piston dish, the adjusting hole along positioning fixture centre of a circle evenly distributed is seted up to positioning fixture's periphery, installs adjusting bolt in the adjusting hole, positioning fixture's upper surface inboard offsets with the top surface of piston dish, the positioning fixture's upper surface is last to have seted up along positioning fixture centre of a circle evenly distributed's positioning hole.

The principle of the scheme is as follows:

when the top surface of the piston disc is required to be drilled with a threaded hole, the positioning fixture drilled with the positioning hole is sleeved on the top of the piston disc, the piston disc is clamped by using the adjusting bolt in the adjusting hole, and the drilling work of the piston disc surface can be realized by drilling the drill bit into the positioning hole.

The beneficial effect that this scheme produced is:

1. by arranging the disc-shaped positioning clamp and arranging the positioning hole on the positioning clamp, the diameter of the positioning clamp is slightly larger than that of the piston disc, the drill bit can directly drill the piston disc through the positioning hole on the positioning clamp without manually using a die to draw lines, the accuracy of line drawing is improved, deviation can not occur in the installation positions of the follow-up threaded hole and the spiral spring, and the drill bit can be matched with other parts,

2. through setting up regulation hole and adjusting bolt in positioning fixture's periphery, when placing positioning fixture with the piston dish, through adjusting bolt's screwing, can firmly fix piston dish and positioning fixture together, compare in artifical drawing the locating hole, the mould is in case misplaced, just need draw the locating hole again, appears the deviation in follow-up piston dish and coil spring assembly in-process, and then influences the yield of piston dish.

Further, adjusting bolt stretches into positioning fixture one side and is fixed with the rubber pad, and the rubber pad is the disc, and the thickness of rubber pad is 3mm, and the rubber pad removes to the side of piston disc under adjusting bolt's drive, uses the rubber pad can avoid adjusting bolt's tip to directly carry out the rigid contact with the piston disc, causes the damage to the piston disc.

Furthermore, the diameter of the positioning clamp is 280-350 mm, and the positioning clamp can be replaced according to the size of the piston disc, so that the piston disc surfaces with different sizes can be drilled.

Further, transversely set up the constant head tank that extends along drilling platform middle part on the drilling platform, the piston rod card is at the constant head tank top surface, and the constant head tank passes one side of drilling platform, has placed the bench drill on drilling platform, and the piston dish is when placing drilling platform on, and the constant head tank can block the piston rod, avoids the piston dish to have the displacement by a wide margin, influences the piston dish drilling.

Further, the aperture of the positioning hole is 7 mm-9 mm.

Further, the middle part of positioning fixture is the fretwork form, and the middle part of positioning fixture fretwork is gone into to piston disc top surface card, goes into fretwork department through the enhancement portion card with the piston disc, twists adjusting bolt and can make the piston disc location at the middle part of positioning fixture, and then avoids appearing drilling and appear the condition of skew.

Drawings

FIG. 1 is a schematic view of a positioning fixture of the present utility model;

FIG. 2 is a schematic diagram of a piston structure according to the present utility model;

FIG. 3 is a schematic view of the piston disc of the present utility model mounted to a drilling platform;

FIG. 4 is a schematic view of a drilling platform according to the present utility model;

fig. 5 is a schematic diagram of a conventional piston structure.

Reference numerals in the drawings of the specification include:

the drilling device comprises a piston rod 1, a piston disc 2, a drilling part 3, a reinforcing part 4, a positioning clamp 5, an upper surface 5-1, an adjusting bolt 6, a rubber pad 6-1, a positioning hole 7, a drilling platform 8, a positioning groove 8-1 and a bench drill bit 9.

Detailed Description

The following is a further detailed description of the embodiments:

as shown in fig. 1 to 4, a positioning hole 7 is provided on an upper surface 5-1 of the positioning jig, and a piston rod 1 is provided on a lower end surface of a piston disc 2 with this as a reference of direction.

An example is substantially as shown in figure 1:

the braking piston is used as a part of a braking cylinder, the braking piston is composed of a piston rod 1 and a piston disc 2, the piston rod 1 is vertically connected to the lower end face of the piston disc 2 and is located at the geometric center of the lower end face, the upper end face of the piston disc 2 is divided into a drilling part 3 and a raised reinforcing part 4, the drilling part 3 is circumferentially distributed along the reinforcing part 4, the reinforcing part 4 is of a circular boss structure, and the joint of the reinforcing part 4 and the drilling part 3 forms a step shape with high and low appearance.

The positioning fixture 5 is disc-shaped, the middle part of the positioning fixture 5 is in a hollow shape of a round hole, the diameter of the hollow hole is consistent with the diameter of the reinforcing part 4 of the piston disc 2, three groups of positioning holes 7 penetrating through the upper surface 5-1 of the positioning fixture are vertically formed in the upper surface 5-1 of the positioning fixture, two positioning holes 7 are in one group, and the three groups of positioning holes 7 are uniformly distributed along the circle center of the disc of the positioning fixture 5. As shown in fig. 1 and fig. 3, three penetrating adjusting holes are transversely formed in the side face of the positioning fixture 5, the inner wall of each adjusting hole is threaded, an adjusting bolt 6 used for fixing the piston disc 2 is connected to each adjusting hole in a non-threaded mode, a rubber pad 6-1 is fixedly adhered to one side, extending into the positioning fixture 5, of each adjusting bolt 6, the thickness of each rubber pad 6-1 is 3mm, when the piston disc 2 is placed into the positioning fixture 5, the adjusting bolts 6 in the 3 adjusting holes are screwed, the adjusting bolts 6 are extruded and abutted against the side face of the piston disc 2, the piston disc 2 is firmly fixed in the positioning fixture 5, the rubber pad 6-1 can be prevented from being directly in hard contact with the side face of the piston disc 2, and damage is caused to the side face of the piston disc 2.

The positioning clamp 5 is divided into three sizes according to the diameter of the piston disc 2, namely 280mm, 310mm and 350mm, and the positioning clamp 5 with corresponding size can be selected according to the diameter of the piston disc 2; when the piston disc 2 is sleeved in the positioning fixture 5, the reinforcing part 4 on the top surface of the piston disc 2 can be embedded into the hollow part in the center of the positioning fixture 5, the reinforcing part 4 is clamped into the hollow part through observation, the piston disc 2 is shown to be positioned in the middle of the positioning fixture 5, and the piston disc 2 is firmly fixed at the center of the positioning fixture 5 by screwing the adjusting bolt 6.

As shown in fig. 4, the positioned piston disc 2 needs to be placed on the drilling platform 8 for drilling, four supporting legs are fixed at the bottom of the drilling platform 8, a positioning groove 8-1 extending towards the middle of the drilling platform 8 is formed in one side of the drilling platform 8, the positioning groove 8-1 is a U-shaped groove, and as the piston rod 1 is fixed on the lower end surface of the piston disc 2, when the piston disc 2 is placed on the drilling platform 8, the piston rod 1 can be embedded into the positioning groove 8-1, and the specific installation mode is shown in fig. 3; a bench drill is arranged on the drilling platform 8, and a bench drill bit 9 can drill a threaded hole on the disc surface of the piston disc 2 through a positioning hole 7 arranged on the upper surface 5-1 of the positioning clamp.

The specific implementation process is as follows:

when the disc surface of the piston disc 2 with the piston rod 1 is required to be drilled, a positioning clamp 5 with a proper size is selected according to the diameter of the piston disc 2, the positioning clamp 5 is sleeved on the periphery of the piston disc 2, and a reinforcing part 4 on the top surface of the piston disc 2 is embedded into a hollow part in the middle of the positioning clamp 5; the adjusting bolts 6 in the three adjusting holes are screwed, the side surfaces of the piston disc 2 are screwed through the adjusting bolts 6 and extruded, so that the piston disc 2 is firmly fixed in the middle of the positioning clamp 5, after the piston disc 2 is positioned, the piston disc 2 carrying the positioning clamp 5 is placed on the drilling platform 8, and a piston rod 1 connected with the piston disc 2 is embedded into the positioning groove 8-1; and drilling holes in the positioning holes 7 formed in the upper surface 5-1 of the positioning clamp by using the bench drill bit 9, so that the drilling of one piston disc 2 is completed, and after the drilling is completed, the positioning clamp 5 is rotated to drill the next threaded hole until the drilling of all the threaded holes is completed.

The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. The utility model provides a disc work piece boring grab, includes the boring platform of locating clamp and placing the piston dish of location piston dish, its characterized in that: the periphery of the positioning clamp is provided with adjusting holes uniformly distributed along the circle center of the positioning clamp, adjusting bolts are arranged in the adjusting holes, the inner side of the upper surface of the positioning clamp is propped against the top surface of the piston disc, and the upper surface of the positioning clamp is provided with positioning holes uniformly distributed along the circle center of the positioning clamp.

2. A disc workpiece drilling positioning fixture as defined in claim 1, wherein: one side of the adjusting bolt extending into the positioning clamp is fixedly provided with a rubber pad.

3. A disc workpiece drilling positioning fixture as defined in claim 1, wherein: the diameter of the positioning clamp is 280-350 mm.

4. A disc workpiece drilling positioning fixture as defined in claim 1, wherein: the drilling platform is transversely provided with a positioning groove extending along the middle of the drilling platform, a piston rod is clamped on the top surface of the positioning groove, the positioning groove penetrates through one side of the drilling platform, and a bench drill is placed on the drilling platform.

5. A disc workpiece drilling positioning fixture as defined in claim 1, wherein: the aperture of the positioning hole is 7 mm-9 mm.

6. A disc workpiece drilling positioning fixture as defined in claim 1, wherein: the middle part of positioning fixture is the fretwork form, and piston dish top surface card is gone into the middle part of positioning fixture fretwork.