Continuous Compression Wire Spring Polishing Apparatus Configured to Easily Replace Two Parallel and Opposite Grindstones

Abstract

The present disclosure relates to a contiguous compression wire sprang polishing apparatus that continuously polishes end surfaces of compression wise springs (10) by upper and lower chain conveyers 100 and 200 and grinding units 300. The apparatus includes: two gaming units (300) each having a grindstone (350) to which rotational force of a motor (240) is transmitted through a gear box (260), the motor (240) having a rotary shaft being located above a central axis of the grindstone (350), and the two grinding units (300) being installed to be parallel and opposite to each other at opposite sides of a compression wire spring (10) fixed to the continuous compression wire spring polishing apparatus so as to polish opposite end surfaces of the compression wire spring (10); two hinge shafts (140), which are fixed at positions, which are spaced apart from grindstones in the lowest surface of the grinding units (300) by a predetermined distance, and which are inserted into and coupled to bearings, which are fixed to a body of the polishing apparatus; an upper guide (225) configured to prevent the compression wire spring (10) from springing out and a rod end fixing shaft (150) fixed to an end of the cylinder rod (170) of the pneumatic cylinder (180) inserted into and coupled to a bearing fixed at a position between the grindstone rotation shaft and the hinge shaft (140) in each of the grinding units (300). The grindstone rotation shaft of each of the grinding units (300) is turned into the vertical state or the horizontal state according to the forward and backward movements of the pneumatic cylinder (180), so that the two grindstones (350) of the grinding units (300), which are mounted to be parallel and opposite to each other, can be easily replaced.

Claims

1. A continuous compression wire spring polishing apparatus that continuously polishes end surfaces of compression wire springs (10) each seated on a fixed block (190) fixed to a chain conveyor (100), the apparatus comprising: two grinding units (300) each having a grindstone (350) to which rotational force of a motor (240) is transmitted through a gear box (260), the motor (240) having a rotary shaft being located above a central axis of the grindstone (350), and the two grinding units (300) being installed to be parallel and opposite to each other at opposite sides of a compression wire spring (10) fixed to the continuous compression wire spring polishing apparatus so as to polish opposite end surfaces of the compression wire spring (10); an upper guide (225) configured to prevent the compression wire spring (10) from springing out; two hinge shafts (140), which are fixed at positions, which are spaced apart from grindstone rotation shafts of the grinding units (300) by a predetermined distance, and which are inserted into and coupled to bearings, which are fixed to a body of the polishing apparatus, so as to allow the grinding units (300) to be turned such that the grinding units (300) are switched between a horizontal state and a vertical state; a cylinder rod (170) integrally fixed to a pneumatic cylinder (180) to be interlocked with forward and backward movements of the pneumatic cylinder (180); and a rod end fixing shaft (150) fixed to an end of the cylinder rod (170) inserted into and coupled to a bearing fixed at a position between the grindstone rotation shaft and the hinge shaft (140) in each of the grinding units (300), wherein the grindstone rotation shaft of each of the grinding units (300) is turned into the vertical state or the horizontal state according to the forward and backward movements of the pneumatic cylinder (180), so that the two grindstones (350) of the grinding units (300), which are mounted to be parallel and opposite to each other, can be easily replaced.

2. The apparatus of claim 1, wherein the upper guide (225) is configured to be adjusted by a balance gear (215).

3. The apparatus of claim 1, wherein the bearing is a self-aligning bearing.

4. The apparatus of claim 1, wherein the pneumatic cylinder (180) is configured to be driven by a servo-motor (130).

5. The apparatus of claim 1, further comprising: an angle adjustment stopper (250) configured to enable a fine angle adjustment by an angle adjustment handle (270) having an adjustment screw.

6. The apparatus of claim 1, further comprising: a control panel configured to control operation of the pneumatic cylinder (180).

Description

BRIEF DESCRIPTION OF THB DRAWINGS

[0012] The above and other aspects, features and advantages of the present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0013] FIG. 1 is a view illustrating the structure of an ordinary compression wire spring;

[0014] FIG. 2 is a front view illustrating the structure of a continuous compression wire spring polishing apparatus according to an embodiment of the present disclosure;

[0015] FIG. 3 is a plan view illustrating the structure of a continuous compression wire spring polishing apparatus according to an embodiment of the present disclosure:

[0016] FIG. 4 is a plan view illustrating a state in which four grinding units according to an embodiment of the present disclosure are mounted;

[0017] FIG. 5 is a side view illustrating the state in which the four grinding units according to the embodiment of the present disclosure are mounted;

[0018] FIG. 6 is a front view illustrating the state in which the four grinding units according to the embodiment of the present disclosure are mounted;

[0019] FIG. 7 is a side view illustrating the state in which a grinding unit according to an embodiment of the present disclosure is vertical; and

[0020] FIG. 8 is a view illustrating the state in which the compression wire springs are installed when the compression wire spring is polished in the present disclosure.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

[0021] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. Descriptions will be made in detail with reference to the portions necessary for understanding the operations and actions according to the present disclosure. While the embodiments of the present disclosure have been described, a description for technical features, which are well known in the technical field to which the present disclosure belongs and are not directly related to the present disclosure, will be omitted. This is to transmit the gist of the present disclosure more clearly without obscuring the gist of the present disclosure by omitting unnecessary descriptions.

[0022] In describing the constituent elements of the present disclosure, the constituent elements of the same names may be denoted by different reference numerals in some drawings, or may be denoted by the same reference numerals even in different drawings. However, even in such a case, it does not mean that the corresponding components have different functions according to the embodiments, or that they have the same functions in different embodiments. The functions of respective components shall be determined based on the descriptions thereof in the corresponding embodiments.

[0023] In addition, the technical terms used in this specification should be interpreted in a sense generally understood by a person skilled in the art to which the present disclosure belongs, unless otherwise defined in this specification. The technical terms should not be interpreted as excessively comprehensive or excessively narrow sense.

[0024] Furthermore, a singular form as used in this specification includes a plural form thereof unless it has different meaning in context. In the present application, the terms, comprising including, or the like should not be interpreted that various constituent elements or steps described in the specification are necessarily included. It should be interpreted that some of the constituent elements or some steps may not be included, or additional constituent elements or steps may be further included.

[0025] The present disclosure provides a continuous compression wire spring polishing apparatus in which, as in the compression wire spring polishing apparatus, which was proposed by the inventors of the present disclosure in Korean Patent No. 1304975, compression wire springs are seated on a fixing block 190 fixed to a chain conveyor and the end surfaces of the compression wire springs are polished while the compression wire springs move in the vertical direction, so that operators can easily replace a grindstone.

[0026] FIGS. 2 and 3 illustrate the structure of a continuous compression wire spring polishing apparatus according to an embodiment of the present disclosure. The end surfaces of compression wire springs 10 seated on a fixed block 190 fixed to a chain conveyor 100 moved by the power of a servo motor 245 are continuously polished by the grindstones of the grinding units 300. The compression wire springs 10 are protected by an upper grade 225 so as not to spring out while being moved, and a gap between the upper guide 225 and the fixing block 190 can be adjusted depending on the size of the compression wire springs 10. The balance in the vertical height direction and the chain conveyor moving direction of the upper guide 225 can be adjusted by the balance gear 215.

[0027] FIG. 4 illustrates a structure of a grinding unit 300 in which a grindstone of the continuous compression wire spring polishing apparatus according to the embodiment of the present disclosure is replaced. In the grinding unit 300, the rotational force of a motor 240 is transmitted to a grindstone 350 to be rotated through a gear box 260. A hinge shaft 140 of the grinding unit 300, which is fixed at a position speed apart from the grindstone rotation shaft of the grinding unit 300 by a predetermined distance, is inserted into and coupled to a bearing fixed to the body of the grinding apparatus, so that the grinding unit 300 can be turned about the hinge shaft 140 so as to be switched between a horizontal state and a vertical state. In addition, a cylinder rod 170, which is integrated to be interlocked with the pneumatic cylinder 180 according to the forward and backward movements of the pneumatic cylinder, is fixed to the body of the polishing apparatus, and the cylinder rod 170 includes a rod end fixing shaft 150 formed on an end thereof. The rod end fixing shaft 150 of the cylinder rod 170 is inserted into and coupled to a self-aligning bearing. which is installed in the grinding unit 300 and fixed at a position between the rotation shaft of the grinding wheel and the hinge shaft 140, whereby the grinding unit 300 is configured such that in accordance with forward and backward movements of the pneumatic cylinder 180, the rod end fixing shaft 150 is moved and rotated in the self-aligning bearing of the grinding unit 300, thereby rotating the grinding unit.

[0028] In order to replace the grindstone 350, a fixing bolt (not illustrated in the drawing) is loosened, so that the grinding unit 300 can be turned around the hinge shaft 140. When the pneumatic cylinder 180 is advanced long in the state where the grinding unit 300 can be turned, the grinding unit 300 is turned 90 degrees around the hinge shaft 140 such that the grindstone rotation shaft of the grinding unit 300 is placed in a vertical state, so that the grindstone 350 used for a predetermined period can be easily replaced with a grindstone 350 having a corrected grinding surface.

[0029] When the operation of fixing the grindstone with the fixing bolt is completed in the state in which the grindstone rotation shaft is placed vertical, the pneumatic cylinder 180 is moved backward to turn the grindstone rotation shaft to the horizontal state by 90 degrees and the grinding unit 300 is fixed by the fixing bolt, whereby the compression wire spring 10 placed in the state in which the end surfaces thereof of the compression wire spring 10 be polished.

[0030] The present disclosure preferably includes an angle adjustment stopper 250 so that the grindstone rotation shaft can be accurately placed and fixed in the horizontal state. The angle adjustment stopper 250 is installed on the body of the polishing apparatus, is fixedly coupled adjacent to the position where the pneumatic cylinder 180 is installed, and is installed at a position where the angle adjustment stopper 250 reaches the central position of the grinding unit 300. The grinding unit 300 can be set to the accurate horizontal state by finely adjusting an angle by rotating an angle adjustment handle 270 having an angle adjustment screw in such a manner that the angle adjustment handle 270 is aligned with the angle adjustment stopper.

[0031] In the present disclosure, the pneumatic cylinder 180 is driven by a servo-motor 130 installed on one side of the pneumatic cylinder 180.

[0032] In the present invention, a pneumatic apparatus may be preferably used as the pneumatic cylinder 180, but a precise hydraulic device may be used as the pneumatic cylinder 180, for example, when high accuracy is required.

[0033] In the present disclosure, the operation of the pneumatic cylinder 180 may be controlled by a separately installed control panel, and the grinding unit 300 can be controlled and managed by the control panel such that the grindstone rotation shaft is in the vertical state or horizontal state.

[0034] In the present disclosure, it is necessary to install at least grinding units 300 in order to polish the left and right end faces of the compression wire springs 10. Further, a plurality of grinding units 300 may be disposed on one side such that polishing is performed several times according to the accuracy required for the compression wire springs to be polished.

[0035] Although the embodiments of the present disclosure have been described with reference to the accompanying drawings, it can be understood by a person ordinarily skilled in the art that the present disclosure may be embodied in other specific forms without departing from the technical spirit or essential features thereof.

[0036] Therefore, the embodiments described above are to be considered as illustrative but not restrictive in all respects, and the scope of the present disclosure described in the foregoing detailed description is defined by the following claims, so that all changes or modifications, which can be conceived from the equivalent concept of the present disclosure, are to be interpreted as being included within the scope of the present disclosure.