JPH0622789B2 - Rubber hose end peripheral grinding device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rubber hose end peripheral grinding device.

[Prior Art] Rubber hoses for high-pressure piping such as brake hoses and power steering hoses are used in automobiles.

These brake hoses and power steering hoses are important safety parts for automobiles.

To manufacture these brake hoses and power steering hoses, first, in order to obtain dimensional accuracy and roundness, insert a mandrel 50 matching the inner diameter of the inner rubber layer 31 as shown in FIG. After 32, the outer layer rubber 33 is finally extrusion-coated, and then heated and vulcanized, and finally the mandrel 50 is extracted to obtain a long vulcanized rubber hose.

Next, the obtained long vulcanized rubber hose is pulled out and cut into short pieces of a predetermined length.

Then, as shown in FIG. 8, fitting fittings 40 are attached to both ends of the rubber hose 30, respectively, and then the socket 4
2 is swaged toward the plug 41, and the joint fitting 40 is fastened to the rubber hose 30.

Brake hoses and power steering hoses, in which joint fittings 40 are respectively fastened to both ends of the rubber hose 30, are naturally required to have assembly workability and safety of an automobile.

[Problems to be Solved by the Invention] According to the method for manufacturing the rubber hose 30 described above, the hose 3
Although the dimensional accuracy and the circularity of the inner diameter of 0 can be obtained, the dimensional accuracy and the circularity of the outer diameter of the extrusion-coated outer rubber layer 33 are not necessarily sufficient. For example, as shown in FIG. In some cases, an eccentric portion 33b that is eccentric with respect to the desired outer diameter 33a indicated by the dotted line may be formed, or as shown in FIG. 10, the outer diameter 33c may be thicker than the desired outer diameter 33a. Many.

A high-pressure pressure medium such as brake oil or power steering oil flows in the rubber hose 30, and if the outer diameter dimension and the roundness are insufficient as described above, the joint metal fitting 40 is added. When tightened, the seal may have an inadequate portion, which may impair safety.

Therefore, when the uneven thickness or the thick portion is generated, it is important to correct the outer diameter of the rubber hose end so that the outer diameter and the roundness are optimum for the inner diameter of the fitting.

Conventionally, as a prior art for such a purpose, the actual development of Sho 62-
68,757, and JP-A-62-15069.

However, these devices are a method of grinding a fixed rubber hose by means of a star gear-like polishing device that largely rotates around the rubber hose. As a result, the device becomes large and heavy, and an extremely complicated mechanism is required. Therefore, it is difficult to precisely grind a rubber hose, and the rubber hose to be ground is pressed and deformed due to the rubber elasticity of the rubber hose and the weight of the planetary gear-like polishing device, which makes it difficult to obtain a roundness, and the workability is poor. In addition, there is a problem that the device becomes expensive.

The present invention was made in view of such a point, and the purpose thereof is to eliminate the above-mentioned conventional drawbacks,
An object of the present invention is to provide a novel rubber hose end outer circumference grinding device which is capable of grinding the end outer circumference of a rubber hose with high accuracy while being a small and simple device.

[Means for Solving the Problems] The gist of the present invention is that when a worker closely fits a rubber hose to be ground on a mandrel, the rubber hose to be ground by a rotary drive mechanism rotates together with the mandrel. This is a rubber hose end outer peripheral grinding device capable of highly accurately grinding the outer periphery of a rubber hose concentrically with the mandrel by contacting a rotating grindstone.

That is, the rubber hose end peripheral grinding device of the present invention comprises a fixed table and a moving table which is installed in parallel with the fixed table and is movable in the parallel direction, and the fixed table has a base which can be moved forward and backward by rotating a screw. A mandrel that is attached and has a whetstone that is rotated by a whetstone rotation motor installed at its base, and that is installed parallel to the rotation axis of the whetstone on a moving table and that can be inserted with a rubber hose for grinding into the inner diameter insertion part at its tip. In a rubber hose end outer peripheral grinding device having the above, a new contact / separation mechanism and a rotation drive mechanism are provided.

Here, the contact / separation mechanism is a cylinder that moves in the vertical direction of the moving table, a cylinder base that can swing around the supporting rod as a fulcrum by the vertical movement of the cylinder, and a core moving cylinder fixed to the cylinder base. It consists of and.

The rotation drive mechanism includes a sliding guide that can rotatably support one end of the mandrel on the moving table and a roller rotation motor that can rotatably support the rubber hose fitted to the other end of the mandrel. A rotating roller integrally fixed to the shaft of the motor shaft gear fixed to the rotating shaft, an intermediate gear meshing with the motor shaft gear, and rotation integrally fixed to the gear meshing with the intermediate gear. Composed of Laura.

[Operation] The rubber hose end outer circumference grinding device of the present invention comprises, firstly, a fixed table and a moving table which is installed in parallel with the fixed table and is movable in the parallel direction. A base that can move forward and backward is attached, and a grindstone that is rotated by a grindstone rotation motor is installed on the base, and a rubber hose that is installed parallel to the rotating axis of the grindstone on the moving table and that grinds the inner diameter insertion part at the tip of the grindstone. By using a rubber hose end peripheral grinding device that has a mandrel that can be inserted through, the device can be separated into a grinding part installed on a fixed table and a grinding rubber hose holding part installed on a moving table, making it compact, lightweight, and workable. Secondly, the cylinder that moves vertically on the moving table and the cylinder By installing a contact / separation mechanism consisting of a cylinder base that can swivel around a support rod as a fulcrum and a mandrel moving cylinder fixed to the cylinder base, the rubber hose to be ground can be quickly and easily attached to the grinding part of the fixed table. To improve workability. Thirdly, a sliding guide that is installed on the moving table and is configured integrally with the cylinder base, and that can support one end side of the mandrel for sliding movement and rotation. And a rotary roller integrally fixed to the shaft of a motor shaft gear fixed to the rotation shaft of a roller rotation motor capable of rotatably supporting a rubber hose fitted to the other end of the mandrel, and the motor shaft gear. A rubber hoe to be ground by installing a rotary drive mechanism including an interlocking intermediate gear and a rotating roller integrally fixed to the interlocking gear. While being fitted to the mandrel and without being deformed by the weight of other members, it can be rotated concentrically with the mandrel with high accuracy, and as a result, these constituent features act synergistically to make it compact and simple. Although it is a device, the outer periphery of the end of the rubber hose can be ground with high accuracy and productivity can be significantly improved.

[Embodiment] Next, an embodiment of a rubber hose end peripheral grinding device of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of a rubber hose end peripheral grinding device of the present invention.

In FIG. 1, reference numeral 1 denotes a mandrel, and an inner diameter insertion portion 1a through which a rubber hose 30 is inserted is provided at the tip of the mandrel 1. The mandrel 1 is rotatably held by a mandrel holder 10 via a bearing 9, and the mandrel holder 10 is a piston rod 1 of a mandrel moving cylinder 11.
It is fixed to the end of 2.

In FIG. 1, reference numeral 13 is a sliding guide, which holds the supported core metal 1 so as to be slidably movable and simultaneously rotatable, while being integrally formed with a cylinder base 15 of a contact / separation cylinder 14 described later. The rubber hose 30 is configured to have a role of contacting and separating the rubber hose 30 from the rotating rollers 3 and 3 as described later.

The rotating rollers 3 and 3 are provided on the inner diameter insertion part 1 at the tip of the mandrel 1.
The rubber hose 30 inserted in a can be rotated. 4 is a motor for rotating the rollers 3, 3.

Reference numeral 7 denotes a moving table. The moving table 7 is provided with a holding portion for the mandrel 1, a rotating mechanism portion for rotating the mandrel 1, and a contact / separation mechanism portion for contacting and separating the rubber hose 30 with the rotating rollers 3, 3. Has been done. The moving table 7 is constructed so that it can be moved forward and backward in the directions of arrows A and A'in the figure by a moving table cylinder 8.

A fixed table 6 is provided with a grindstone 2 which is rotated by a grindstone rotating motor 5 on the fixed table 6 side.

Here, the outer diameter of the inner diameter insertion portion 1a of the mandrel 1 described above has a diameter capable of being in close contact with the inner surface of the rubber hose 30, and when the rubber hose 30 is inserted into the inner diameter insertion portion 1a,
As shown in FIG. 2, the mandrel moving cylinder 11 is operated to move the mandrel 1 in the direction of arrow P, and the inner diameter insertion portion 1a is projected from the edge of the table 7 in FIG. , And the cylinder 11 is operated again to move in the direction of arrow P'shown in FIG. 2 to bring the rubber hose 30 onto the rotating rollers 3, 3 as shown in FIG.

FIG. 3 is an explanatory view showing a rotating mechanism of the rotating rollers 3 and 3 for rotating the rubber hose 30 inserted and moved in the mandrel 1 as described above.

In FIG. 3, rotating rollers 3 and 3 are rotating gears 17 and 1, respectively.
7, bearings 17a and 17b are supported coaxially, and by rotating the roller motor 4, both can be rotated in the same direction via the gear 16 and the intermediate gear 18.

FIG. 4 is an explanatory view showing a mechanism for bringing the rubber hose 30 into contact with and separating from the rotating rollers 3 and 3.

The contact / separation mechanism can relatively advance and retract the grindstone 2 and the mandrel 1, and as a result, the rubber hose 30 inserted through the inner diameter insertion portion 1a of the mandrel 1 is rotated by the rotary roller 3,
3 can be contacted and separated.

That is, in FIG. 4, when the rod of the cylinder 14 is moved in the direction of arrow B in FIG. 4, the cylinder base 15 makes a swivel motion as indicated by arrow C with the support point of the support rod 19 as a fulcrum, and the rubber hose 30 rotates the rotary roller. Pressed on 3,3. This causes the rubber hose 30 to rotate the rotating rollers 3,3.
, And is rotated in a fixed direction as shown in FIG.

On the other hand, the grindstone rotation motor 5 on the fixed table 6 in FIG.
Are mounted on the base 21 as shown in FIG. 4, and thereby rotate the grindstone 2. The base 21 is provided with a screw 20, and by rotating the screw 20, the base 21 can be moved forward and backward.

Next, the operation of grinding the outer circumference of the rubber hose 30 using the above device will be described.

First, the rubber hose 30 inserted into the inner diameter insertion portion 1a of the mandrel 1 is rotated by contacting the rotating rollers 3 and 3 by the operations shown in FIGS.

Secondly, the grindstone 2 is rotated in the same direction as the rubber hose 30 and the rotating grindstone 2 is moved by the screw 20 shown in FIG. 4, and the rubber hose 3 is moved as shown in FIG.
0 and the grindstone 2 are brought into contact with each other. The degree of grinding of the rubber hose 30 is determined by the degree of this contact. Therefore, if the screw 20 is finely adjusted so as to obtain the optimum amount of grinding, highly accurate surface grinding can be performed.

In this state, the table moving cylinder 8 shown in FIG. 1 is operated to move the moving table 7 in the direction of arrow A in the figure, so that the rubber hose 30 is also moved and the grinding width l of the grindstone 2 is moved.
It is possible to grind the outer peripheral surface of the rubber hose 30 by a necessary length over the distance.

The grinding work as described above is performed while rotating the rubber hose 30 concentrically with the highly accurately processed mandrel 1.
Moreover, since the grinding amount of the grindstone 2 can also be adjusted with high precision by the screw 20, the outer periphery of the rubber hose 30 is eventually shaped to follow the outer periphery of the mandrel 1 which has been processed with high precision, and the outer periphery of high precision can be obtained. It can be ground to have a diameter and a high roundness.

Finally, when the grinding work of a predetermined length is completed, for example, by operating a preset limit switch, the pressing of the rubber hose 30 against the rotating rollers 3 and 3 is released, thereby separating it from the grindstone 2 and moving it. Table 7
1 is returned in the direction of A ′ in FIG. 1 to return to the original position, the mandrel moving cylinder 11 is operated to project the mandrel 1, and the rubber hose 30 is removed to complete the grinding operation.

FIG. 11 is a flowchart showing the above operation.

In the above, an example of grinding one rubber hose in one operation is shown. However, as shown in FIG. 6, the rubber hoses 30, 30 'are arranged on both sides of the grindstone 2 so that two rubber hoses can be ground at the same time. You can also

Further, although an example in which a grindstone is specifically used as a grinding member has been shown, it goes without saying that the grindstone is not limited to the grindstone.

[Advantages of the Invention] As described above, the rubber hose end peripheral grinding device of the present invention is
It has the following excellent effects.

(1) Since the outer periphery of the highly accurately processed mandrel is copied, the rubber hose can be ground to a highly accurate outer diameter with a high roundness.

(2) As a result of making the wall thickness and outer diameter of the hose uniform, the sealing effect by caulking the joint fitting is also made uniform, and the reliability of the joint fitting fastening portion can be significantly improved.

(3) Since it is small and lightweight and has good workability, productivity can be significantly improved.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a rubber hose end peripheral grinding device of the present invention, FIG. 2 is an explanatory view of a mandrel moving mechanism, and FIG.
FIG. 4 is an explanatory view of a mechanism of a roller rotating portion, FIG. 4 is an explanatory view of a contact / separation mechanism of a rubber hose with respect to a roller and a grindstone, FIG. 5 is an explanatory view showing a grinding condition of a hose, and FIG. FIG. 7 is an explanatory view showing an embodiment, FIG. 7 is an explanatory view showing a structure of a hose and a mandrel insertion state, FIG. 8 is a sectional view showing a situation in which a fitting is attached, and FIGS. 9 and 10 are outer diameters of the hose. FIG. 11 is an explanatory diagram showing a defective situation, and FIG. 11 is a flowchart showing an operation according to the present invention. 1: Mandrel, 2: Grindstone (grinding member), 3: Rotating roller, 7: Moving table, 30: Rubber hose.

Claims (1)

[Claims] 1. A fixed table provided with a base capable of moving forward and backward by rotating a screw, and a grindstone rotating by a grindstone rotating motor being installed on the base, and a fixed table arranged in parallel with the fixed table and in a direction parallel to the fixed table. A rubber hose end outer peripheral grinding, which is composed of a movable table which is movable, and which is installed in parallel with the rotation axis of the grindstone and has a mandrel through which a rubber hose for grinding can be inserted at an inner diameter insertion portion of its tip. In the apparatus, the following a and b are installed on the moving table, and a rubber hose end outer circumference grinding apparatus is characterized. a. A contact / separation mechanism including a cylinder that moves in the vertical direction of the moving table, a cylinder base that can pivot around a supporting rod by the upper and lower sides of the cylinder, and a mandrel moving cylinder that is fixed to the cylinder base. b. A sliding guide configured integrally with the cylinder base and capable of slidingly and rotatably supporting one end side of the mandrel, and a roller rotation capable of rotationally supporting a rubber hose fitted to the other end side of the mandrel. Roller integrally fixed to the shaft of the motor shaft gear fixed to the rotation shaft of the motor, an intermediate gear meshed with the motor shaft gear, and integrally fixed to the gear meshed with the intermediate gear Drive mechanism comprising a rotating roller.