CN220880432U - Piston oil duct salt core leveling control tool - Google Patents

Abstract

The utility model discloses a piston oil duct salt core leveling control tool which comprises a supporting plate (1), a pressing plate guide shaft (2) and a pressing plate (3), wherein the pressing plate (3) is fixedly arranged on the pressing plate guide shaft (2), the pressing plate guide shaft (2) penetrates through a central hole arranged on the supporting plate (1) to be in sliding connection with the supporting plate (1), and a bearing (4) is arranged at the joint of the pressing plate guide shaft (2) and the supporting plate (1). According to the improved salt core integral control tool, the assembly precision is high, the use precision is greatly improved, the flatness of the upper end and the lower end of the piston oil duct is improved, and the yield of the size of the piston oil duct is improved.

Description

Piston oil duct salt core leveling control tool

Technical Field

The utility model relates to the technical field of mechanical part tooling equipment, in particular to a piston oil duct salt core leveling control tooling.

Background

The oil duct structure is formed by installing a salt core on a die, casting a piston blank, and washing away the salt core. The oil duct position is ensured by the installation precision of the salt core in the casting process, and the main control flow and measure are that the installation height of the salt core on the die is firstly determined; the salt core is arranged on the piston inner die, and the uniformity of the axial gap between the salt core and the piston outer die is detected by die closing; and then flattening the salt core by using a salt core flattening tool. In the actual operation process, when the existing flattening tool is long in service time and large in use amount, the inner hole of the positioning sleeve and the guide shaft of the pressing plate are worn, the gap between the hole shafts is increased, when the force of an operator manually pressing the salt core pressing plate cannot ensure that the pressure is vertically downward, the pressure is decomposed into transverse force and longitudinal force, and when the gap between the hole shafts of the salt core pressing plate assembly is too large, the transverse force enables the pressing plate and the supporting plate to have a certain deflection inclination angle theta (as shown in a schematic diagram of fig. 3), and the salt core is pressed and deviated; because the two salt core locating rods are equal in height, the salt core is basically not deviated up and down in the direction of the connecting plane of the two salt core locating rods, and the salt core is deviated up and down in the direction perpendicular to the connecting plane of the two salt core locating rods.

Setting: l is the height of an inner hole of the positioning sleeve;

d1 is the diameter of the guide shaft of the pressing plate;

D2 is the diameter of the inner hole of the positioning sleeve;

θ is the deflection inclination angle of the guide shaft of the pressing plate and the inner hole of the positioning sleeve;

Phi is the diameter of the contact part of the salt core and the plane of the pressing plate.

Theoretical calculation:

the clearance b=d2-D1 between the platen guide shaft and the inner bore of the positioning sleeve;

tanθ=b/L=（D2-D1）/L；

θ=arctan【（D2-D1）/L】；

The shift amount Δh=hmax-hmin=Φ=sinθ=Φ=sin { arctan [ D2-D1)/L }.

Through the theoretical calculation, the vertical offset of the salt core is related to the diameter of the salt core, the gap between the guide shaft of the pressing plate and the inner hole of the positioning sleeve and the height of the inner hole of the positioning sleeve; when the diameter of the salt core is larger, the gap between the guide shaft of the pressing plate and the inner hole of the positioning sleeve is larger, and the height of the inner hole of the positioning sleeve is smaller, the vertical offset of the salt core is larger, and conversely, the vertical offset of the salt core is smaller. However, the diameter of the salt core is determined by the design of the product or the requirements of customers and cannot be changed at will, but the vertical offset of the salt core can be reduced by reducing the gap between the guide shaft of the pressing plate and the inner hole of the positioning sleeve and increasing the height of the inner hole of the positioning sleeve.

Disclosure of utility model

The utility model provides a piston oil duct salt core leveling control tool, and aims to solve the technical problem that in the prior art, a gap between shaft holes is increased due to abrasion of the piston oil duct salt core leveling control tool, and vertical deflection of a salt core is large due to insufficient pressing verticality of a pressing plate.

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

The utility model provides a piston oil duct salt core leveling control frock, this frock includes layer board, clamp plate guiding axle and clamp plate, clamp plate fixed mounting is on the clamp plate guiding axle, and the clamp plate guiding axle passes the centre bore and the layer board sliding connection that set up on the layer board, and clamp plate guiding axle and layer board junction are provided with the bearing.

Further, one end of the pressing plate guide shaft is vertically welded with the pressing plate, and the other end of the pressing plate guide shaft is welded with a pressing ball head.

Further, a positioning sleeve is axially extended from the position of the central hole on the supporting plate, the bearing is arranged on the inner wall of the positioning sleeve, and the pressing plate guide shaft is limited in the inner hole of the bearing.

Further, a spring is arranged between the positioning sleeve and the pressing ball head, one end of the spring is abutted against the upper end face of the positioning sleeve, and the other end of the spring is contacted with the pressing ball head.

Further, the bearing is a linear sliding bearing.

Further, the supporting plate is fixed with the upper end face of the outer die of the piston oil duct, and the pressing plate can move downwards to press down the salt core.

Based on the technical scheme, the following technical effects can be produced:

According to the utility model, the positioning sleeve is arranged on the supporting plate of the tool, so that the radial limiting effect of the salt core positioning rod during vertical movement is improved; meanwhile, the linear sliding bearings are vertically arranged in the positioning sleeve in a close-fitting manner, so that the gap between the salt core positioning rod and the positioning sleeve is reduced, the vertical offset of the salt core is reduced, the salt core is kept smooth in the installation and pouring processes, the flatness of the upper end and the lower end of the piston oil duct is improved, and the yield of the size of the piston oil duct is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of the utility model in use;

Fig. 3 is a schematic diagram of a conventional leveling control tool.

In the figure, 1-layer board, 2-clamp plate guiding axle, 3-clamp plate, 4-bearing, 5-press bulb, 6-positioning sleeve, 7-spring, 8-external mold.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. 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.

As shown in fig. 1-2, the piston oil duct salt core leveling control tool comprises a supporting plate 1, a pressing plate guide shaft 2 and a pressing plate 3, wherein the pressing plate 3 is fixedly arranged on the pressing plate guide shaft 2, the pressing plate guide shaft 2 penetrates through a central hole formed in the supporting plate 1 to be in sliding connection with the supporting plate 1, and a bearing 4 is arranged at the joint of the pressing plate guide shaft 2 and the supporting plate 1.

Alternatively or preferably, one end of the platen guide shaft 2 is welded with the platen 3 vertically, and the other end is welded with a pressing ball head 5.

Alternatively or preferably, a positioning sleeve 6 is axially extended from the central hole on the supporting plate 1, the bearing 4 is arranged on the inner wall of the positioning sleeve 6, and the pressing plate guide shaft 2 is limited in the inner hole of the bearing 4.

Alternatively or preferably, a spring 7 is installed between the positioning sleeve 6 and the pressing ball head 5, one end of the spring 7 abuts against the upper end face of the positioning sleeve 6, and the other end of the spring 7 contacts with the pressing ball head 5.

Alternatively or preferably, the bearing 4 is a linear sliding bearing.

Alternatively or preferably, the supporting plate 1 is fixed with the upper end surface of the outer die 8 of the piston oil duct, and the pressing plate 3 can move downwards to press the salt core 9.

The piston oil duct salt core leveling control tool provided by the utility model has high assembly precision and greatly improves the use precision, improves the flatness of the upper end and the lower end of the piston oil duct, and improves the yield of the size of the piston oil duct.

The present utility model has been described in detail with reference to the drawings and the embodiments, but the present utility model is not limited to the embodiments described above, and various changes can be made within the scope of those skilled in the art without departing from the spirit of the present utility model. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (6)

1. The utility model provides a piston oil duct salt core leveling control frock, this frock includes layer board (1), clamp plate guiding axle (2) and clamp plate (3), its characterized in that, clamp plate (3) fixed mounting is on clamp plate guiding axle (2), and clamp plate guiding axle (2) pass centre bore and layer board (1) sliding connection that set up on layer board (1), and clamp plate guiding axle (2) are provided with bearing (4) with layer board (1) junction.

2. The piston oil duct salt core leveling control tool according to claim 1, wherein one end of the pressing plate guide shaft (2) is welded with the pressing plate (3) vertically, and the other end of the pressing plate guide shaft is welded with a pressing ball head (5).

3. The piston oil duct salt core leveling control tool according to claim 1, wherein a positioning sleeve (6) is axially extended from a central hole on the supporting plate (1), the bearing (4) is arranged on the inner wall of the positioning sleeve (6), and the pressing plate guide shaft (2) is limited in an inner hole of the bearing (4).

4. The piston oil duct salt core leveling control tool according to claim 3, wherein a spring (7) is installed between the positioning sleeve (6) and the pressing ball head (5), one end of the spring (7) abuts against the upper end face of the positioning sleeve (6), and the other end of the spring contacts with the pressing ball head (5).

5. The piston oil duct salt core leveling control tool according to claim 1, wherein the bearing (4) is a linear sliding bearing.

6. The piston oil duct salt core leveling control tool according to claim 1, wherein the supporting plate (1) is fixed with the upper end face of an outer die (8) of the piston oil duct, and the pressing plate (3) can move downwards to press down the salt core (9).