KR20230001105A - Shot peening apparatus - Google Patents

Abstract

The present invention relates to a shot peening apparatus comprising: a support on which a workpiece is mounted; a cabinet installed to enclose the workpiece mounted on the support; an injector injecting a steel ball toward the inside of the workpiece by compressed air to perform shot peening; and a transport part transporting the injector in a longitudinal direction in the workpiece. The injector includes: a main body wherein a steel ball injected by compressed air is vertically and horizontally reflected by a reflection part to be injected into the workpiece; pairs of link members installed on both sides by penetrating a portion on which fixing shafts provided on both sides of the main body cross in an X-shape, and maintaining an adjusted crossing angle by tightening a tightening nut screwed to ends of the fixing shafts after adjusting the crossing angle to adjust the height of the main body; pairs of length-variable shafts capable of length adjustment, and provided on the lower and upper sides of the main body by installing ends of the link members facing each other to be parallel with the width direction of the main body; and wheels rotatably installed on both ends of the length-variable shaft. According to the present invention, surface roughness is formed on a pipe in which air and raw materials are transported in a pneumatic conveying system by shot peening to reduce streamers or angle hair during transport.

Description

Shot peening apparatus {Shot peening apparatus}

The present invention relates to a shot peening device, and more particularly, to form a surface roughness for a processing target, so as to form a surface roughness by shot peening in a pipe in which air and raw materials are transported in a pneumatic conveying system to reduce the occurrence of streamers or angel hair that may occur during transfer, to obtain the most effective roughness accompanied by a special processing surface shape for the processing target, and processing with various diameters It relates to a shot peening device that enables shot peening processing of an object and improves the efficiency and quality of shot peening work.

In general, shot peening processing is a type of cold working in which a steel ball is projected on the surface of a metal part at high speed and the surface of the metal is hammered.

In the shot peening process, as the steel ball collides with the metal surface at high speed, the kinetic energy of the steel ball momentarily applies plastic deformation to the surface of the material and leaves the metal surface. After the collision with the steel ball, irregularities are generated on the metal surface layer to form a thin plastic strain layer on the surface, and to form the boundary of the elasto-plastic layer. A force to maintain the stretched surface layer in its pre-stretched state acts on this layer, so that the surface is in equilibrium with residual compressive stress and the inside with tensile stress.

In addition, the shot peening process removes the oxide film on the metal surface and simultaneously generates residual compressive force to harden the surface, so that the effect of improving the fatigue strength can be expected.

As a prior art related to an apparatus for such shot peening processing, Korean Patent Publication No. 10-2013-0134432 "shot peening device" has been disclosed, which is classified into a plurality of zones, an impeller for projecting steel balls, and A body in which an air injector is installed; a cylinder rotatably installed inside the main body and accommodating a plurality of work objects; a driving unit which rotates the cylinder so that a work object accommodated in the cylinder passes through the plurality of zones step by step; a clamp elevating unit for controlling restraint of a work object accommodated in the cylinder; And a rotation unit for rotating the work object accommodated in the cylinder.

However, such a prior art does not properly respond to changes in the diameter of the object to be processed, and lacks configuration for improving the efficiency and quality of the shot peening operation, so there is a need to improve this.

In order to solve the problems of the prior art, the present invention is to form a surface roughness for the processing target, so that the surface roughness is reduced by shot peening in a pipe in which air and raw materials are transported in a pneumatic conveying system. Forming, it is possible to reduce the occurrence of streamers or angel hair that may occur during transfer, to obtain the most effective roughness accompanied by a special processing surface shape for the processing target, and to obtain various diameters The purpose is to enable shot peening processing for a processing target having, and to improve the efficiency and quality of the shot peening operation.

In order to solve the problems as described above, according to one aspect of the present invention, the support on which the processing target of shot peening is seated; a cabinet installed to enclose an object to be processed seated on the support; a sprayer for performing shot peening by spraying steel balls toward the inside of the processing target by means of compressed air; and a conveying unit for transporting the injector along the longitudinal direction from the inside of the target to be processed, wherein the injector is configured to reflect the steel balls ejected by the compressed air vertically and horizontally by the reflector to the inside of the target to be processed. A body to be sprayed into; A pair of fixing shafts provided on both sides of the main body are installed on both sides by penetrating the part where the "X" crosses, and after adjusting the crossing angle to adjust the height of the main body, the tightening nut screwed to the end of the fixing shaft Link members for maintaining the cross angle adjusted by the tightening of; By installing facing ends of the link members so as to be parallel to the width direction of the main body, one pair is provided on the lower and upper sides of the main body, respectively, and length-adjustable shafts capable of adjusting the length; There is provided a shot peening device comprising a; and wheels rotatably installed at both ends of the variable-length shaft, respectively.

The injector, a fixing bracket fixed to the circumference of the main body; and a support bracket fixed by tightening bolts and nuts in a state in which one end is hinged to the fixing bracket, and each other end is hinged to each of the link members on both sides of the main body.

The transfer unit may include a boom connected to the main body of the injector; a transfer cart fixed to the end of the boom and installed to move along a rail installed in the longitudinal direction of the processing target; and a driving motor providing a driving force for the transfer cart to move along the rail.

The driving motor may provide a driving force for moving the injector at a preset speed so that the roughness of the processing surface of the processing target corresponds to a reference value.

A feeding unit for supplying an object to be processed to the support and withdrawing the processed target from the support to the outside, wherein the feeding unit extends to both sides of the support and is inclined downward from the supply side to the withdrawal side. a ramp having a support portion provided at the end of the drawn-out side to support the object to be processed; a first stopper installed on the inclined table to temporarily stop an object to be processed on the side where the object to be processed is supplied to the support; a first driving unit that selectively permits stopping and passing of a processing target by operating the first stopper; A second stopper installed to temporarily stop the processing target on the support; and a second driving unit that selectively allows the object to be processed to stop and pass through by operating the second stopper.

The cabinet is provided with a door that is opened and closed vertically by a door lifting part on both sides of the open side, so that the object to be processed passes through the cabinet through the support by the opening of the door, and for processing the object to be processed. , both open sides can be blocked by the door by the door lifting part.

The door lifting part may include a lifting cylinder installed vertically; a drive chain having one end fixed to the piston rod of the lifting cylinder and the other end fixed to each of the doors; a drive sprocket rotatably installed on an upper side of each of the doors to be connected to each of the drive chains; rotational connecting shafts fixed to each of the drive sprockets and installed parallel to the longitudinal direction of the cabinet; at least one driven sprocket fixed to each of the rotation connecting shafts and installed to rotate together with the drive sprocket; and a driven chain connected to each of the driven sprockets and having an end fixed to the door.

A recovery unit for recovering the steel balls from the cabinet is further included, and the recovery unit includes: a liner installed behind the processing target; a punching plate located below the processing target on the support and having a porous structure to pass steel balls falling after processing the processing target; a transfer pipe providing a recovery path for steel balls below the punching plate and having a discharge port at an end thereof; a conveying screw rotatably installed inside the conveying pipe and moving the steel ball supplied to the inside of the conveying pipe by rotation toward the outlet along the conveying pipe; and a transfer motor for rotating the transfer screw.

According to the shot peening device according to the present invention, the surface roughness is formed on the object to be processed, and the surface roughness is formed by shot peening in the pipe where air and raw materials are transported in the pneumatic conveying system, It can reduce the occurrence of streamer or angel hair that can occur, and it is possible to obtain the most effective roughness accompanied by the shape of the special processing surface for the processing target, and processing with various diameters It is possible to perform shot peening processing on the object, and has an effect of improving the efficiency and quality of the shot peening operation.

1 is a side view showing a shot peening device according to an embodiment of the present invention;
2 is a front view showing a shot peening device according to an embodiment of the present invention;
3 is a plan view showing a shot peening device according to an embodiment of the present invention;
4 is a side view showing the main part of a shot peening device according to an embodiment of the present invention;
5 is a front view showing a main part of a shot peening device according to an embodiment of the present invention.
6 is a perspective view showing a sprayer of a shot peening device according to an embodiment of the present invention.

Since the present invention may have various embodiments by various changes, it will be described by showing specific embodiments in the drawings as examples. In addition, it should be understood that the present invention is not limited to these specific examples, and includes all changes, equivalents, or substitutes included in the technical spirit of the present invention.

Hereinafter, the embodiments according to the present invention will be described in detail with reference to the accompanying drawings, and the same reference numerals are assigned to the same or corresponding components regardless of reference numerals, and redundant descriptions thereof are omitted. do it with

1 is a side view showing a shot peening device according to an embodiment of the present invention, FIG. 2 is a front view showing a shot peening device according to an embodiment of the present invention, and FIG. It is a plan view showing the shot peening device according to.

1 to 3 , the shot peening device 100 according to an embodiment of the present invention may include a support 110, a cabinet 120, an injector 130, and a transfer unit 140.

The support 110 is seated on the upper surface of the workpiece 1 for shot peening. The support 110 may be independently installed directly on the installation surface, for example, but is not limited thereto, and may be installed on the frame 190 installed on the installation surface as another example. Here, the processing target 1 may be a pipe made of a metal material, and may also be made of hollow members having various diameters.

The cabinet 120 is installed to surround the processing target 1 seated on the support 110 . Therefore, it is possible to prevent the steel balls injected from the injector 130 from being scattered to the outside. The cabinet 120 may be configured to enable access of the injector 130 through one side.

The sprayer 130 sprays steel balls toward the inside of the object 1 by means of compressed air to perform shot peening. To this end, the steel balls may be injected by the compressed air by supplying the steel balls to the injection path of the compressed air supplied through a compressed air supply unit such as a compressor. Here, the steel ball may be made of balls of various metal materials, including a sus ball, to perform shot peening processing.

4 and 6, the injector 130 is a main body 131 in which steel balls injected by compressed air are reflected up and down and left and right by the reflector 131b to be injected into the processing target 1. ) and the fixing shafts 133 provided on both sides of the main body 131 are installed by a pair on both sides by penetrating the part where the letter "X" intersects, and after adjusting the crossing angle to adjust the height of the main body 131 The link member 132 maintaining the crossing angle adjusted by tightening the tightening nut 134 screwed to the end of the fixed shaft 133 and the link member 132 parallel to the width direction of the main body 131 By installing facing ends, each pair is provided on the lower and upper sides of the main body 131, and the variable length shaft 135, which is adjustable in length, and the wheel rotatably installed at both ends of the variable length shaft 135, respectively ( 136).

In the body 131, a reflector 131b may be provided on the rear side of the tip 131a protruding forward to have a gap from the outlet in order to spray the steel balls that are sprayed forward vertically and left and right. . The fixing shaft 133 vertically protrudes from both sides of the main body 131 and penetrates a portion where the pair of link members 132 intersect so that the angle of intersection of the link members 132 can be adjusted. Therefore, after adjusting the angle of the link member 132, through screwing to the fixing shaft 133 with the tightening nut 134, the link member 132 maintains the adjusted crossing angle, and thereby, the upper and lower ends By adjusting the height (H) between the wheels 136 respectively positioned on the inside diameter of the object (1), the top and bottom heights can be changed so that the upper and lower wheels 136 can be respectively supported.

The variable length shaft 135 may be formed of a pair of split shafts 135a and 135b that are screwed together or fitted to each other, and the length can be adjusted by adjusting the degree of screwing or fitting, and in addition, various It may be configured to be able to change the length by a method. In order to maintain the length-adjusted state, a tightening nut or the like is screwed into the coupling portion between the divided shafts 135a and 135b, or a pin is used to divide the shaft 135a, 135b) may be coupled to each other, or the divided shafts 135a and 135b may be coupled to each other in a length-adjusted state by various other methods. By varying the length of the variable length shaft 135, the width D between the wheels 136 can be appropriately adjusted according to the inner curvature of the object 1 to be processed.

The injector 130 is fixed by tightening a bolt 137a and a nut in a state in which a fixing bracket 137 fixed to the circumference of the main body 131 and one end of the fixing bracket 137 are each hinged, and each The other end may further include a support bracket 138 hinged to each of the link members 132 on both sides of the main body 131.

The fixing brackets 137 are made of a pair as in this embodiment, and both ends are coupled to each other by tightening a bolt 137a and a nut (not shown) in a state of wrapping the outside of the body 131, It can be fixed to the outer surface. The support bracket 138 is rotatable from the fixing bracket 137 so that the distance to the fixing bracket 137 can be adjusted according to the intersection angle of the link member 132, and is rotated by the link member (138a). After appropriately rotating from 132), the joint portion with the fixing bracket 137 is fixed by tightening the bolt 137a and the nut.

The conveying unit 140 allows the injector 130 to be conveyed along the longitudinal direction from the inside of the object 1 to be processed.

The transfer unit 140 is specifically, a boom 141 connected to the main body 131 of the injector 130 and a rail 145 fixed to the end of the boom 141 and installed in the longitudinal direction of the processing target 1 ), and a drive motor 144 providing a driving force for moving the transfer cart 142 along the rail 145. The drive motor 144 may move the transfer card 142 along the rail 145 by providing rotational force to some of the wheels 143 of the transfer cart 142 using, for example, a sprocket and a chain. Accordingly, while the transfer cart 142 moves along the rail 145 by driving the drive motor 144, the boom 141 moves the injector 130 together. A supply line for supplying compressed gas and steel balls to the injector 130 may be installed in the boom 141 .

The driving motor 144 may provide a driving force for moving the injector 130 at a preset speed so that the roughness of the processing surface of the processing target 1 corresponds to a reference value. Therefore, the moving speed of the injector 130 at which the illuminance on the inner surface of each movable object 1 satisfies the reference value is obtained, and the control unit (not shown) is driven by a drive motor so that the injector 130 can move at the thus obtained moving speed. 144) can control the rotational speed. At this time, the controller variably controls the drive motor 144 to have a predetermined rotational speed for each type of movable object 1 through an operation signal input from the outside. It may also be configured to

The shot peening device 100 according to an embodiment of the present invention supplies a processing target 1 to the support 110 and uses a feeding unit 150 for withdrawing the processed target from the support 110 to the outside. can include more.

The feeding unit 150 extends to both sides of the support 110, is installed inclined downward from the supply side to the withdrawal side, and has a support portion 151a provided at the end of the withdrawal side to support the workpiece 1. 151, and a first stopper 152 installed on the inclined table 151 to temporarily stop the workpiece 1 on the side where the workpiece 1 is supplied to the support 110, and the first stopper 152 ) to selectively allow the stop and pass of the workpiece 1 by operating the first drive unit 153 and the second stopper 154 installed to temporarily stop the workpiece 1 on the support 110 And, by operating the second stopper 154, it may include a second driving unit (not shown) that selectively allows the stop and pass of the processing target 1. At this time, the upper surface of the support 110 may be formed to have the same inclination as the upper surface of the inclined table 151 .

Each of the first and second stoppers 152 and 154 may be rotatably installed on the ramp 151 and the support 110, respectively, and the object 1 is moved from the ramp 151 and the support 110 according to the rotation angle. A support for support may protrude or be inserted inward. At this time, each of the first driving unit 153 and the second driving unit (not shown) is made of a cylinder in which a piston rod is hinged to each of the first and second stoppers 152 and 154, so that the first and second stoppers ( 152 and 154), and thus, the object to be processed 1 can be selected to stop or roll on the inclined table 151 and the support table 110. That is, the second stopper 154 stops the workpiece 1 on the support 110 by the second driving unit when shot peening is performed, and when shot peening is finished, it rolls toward the withdrawal side of the inclined table 151 and moves let it do On the other hand, the first stopper 152 allows the first drive unit 153 to stop the target to be processed 1 waiting for shot peening, and to move ahead on the support 110 for the target to be processed 1. After the shot peening process is finished, the stopped workpiece 1 may enter the support 110 side so that the shot peening process can be performed subsequently.

The cabinet 120 is provided with doors 121 that are opened and closed vertically by the door lifting parts 160 on both open sides, so that the object to be processed 1 passes through the support 110 by the opening of the door 121. To pass through the cabinet 120 and to process the object 1, both open sides may be blocked by the door 121 by the door lifting part 160.

The door lift part 160 includes a lift cylinder 161 installed vertically and a drive chain 162 having one end fixed to the piston rod 161a of the lift cylinder 161 and the other end fixed to the door 121. ), drive sprocket 163 rotatably installed on the upper side of each door 121 so as to be connected to each drive chain 162, and fixed to each drive sprocket 163, parallel to the longitudinal direction of the cabinet 120. Connected to each of the rotation connecting shaft 164, the rotation connecting shaft 164, at least one fixed to each of the driven sprockets 165 installed to rotate together with the drive sprocket 163, and the driven sprocket 165 It may include a follower chain 166 having an end fixed to the door 121. Here, the opposite end of the driven chain 166 to the end fixed to the door 121 is fixed by a weight member, another cylinder, or a slider, so that the door 121 is moved up and down stably by the rotation of the driven sprocket 165. It can also be configured.

The shot peening device 100 according to an embodiment of the present invention may further include a recovery unit 170 for recovering steel balls from the cabinet 120 .

The recovery unit 170 is located on the lower side of the processing target 1 in the liner 171 installed at the rear of the processing target 1 and the support 110, and finishes processing the processing target 1, and falls A punching plate 172 having a porous structure to pass the steel balls, a transfer pipe 173 providing a recovery path for the steel balls at the lower side of the punching plate 172 and having a discharge port 173a at the end, A transfer screw 174 that is rotatably installed inside the transfer pipe 173 and moves the steel ball supplied to the inside of the transfer tube 173 by rotation to the discharge port 173a side along the transfer tube 173; A transfer motor 175 for rotating the transfer screw 174 may be included. Here, the transfer pipe 173 may be configured such that the steel ball is introduced into the inside by providing a punching plate 172 on the open side of the upper part. The transfer motor 175 may transmit rotational force to the transfer screw 174 through, for example, the sprockets 176 and 177 and the chain 178 .

The shot peening device 100 according to an embodiment of the present invention is an exhaust unit that sucks polluted air from the inside of the cabinet 120 using a blowing force such as a fan and exhausts it in a filtered state through a filter 182. (180) may be provided.

According to the shot peening device according to the present invention, the surface roughness is formed for the object to be processed, and the surface roughness is formed by shot peening in the pipe in which air and raw materials are transported in the pneumatic conveying system, Generation of streamers or angel hair that may occur during transportation can be reduced.

In addition, according to the present invention, it is possible to perform shot peening processing on objects having various diameters, and the efficiency and quality of the shot peening operation can be improved.

Although the present invention has been described with reference to the accompanying drawings, various modifications may be made without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limited to the above-described embodiments and should not be defined, but should be defined by the claims and equivalents of these claims.

1: processing target 110: support
120: cabinet 121: door
130: injector 131: main body
131a: tip 131b: reflector
132: link member 133: fixed shaft
134: tightening nut 135: variable length shaft
135a, 135b: divided shaft 136: wheel
137: fixing bracket 137a: bolt
138: support bracket 138a: hinge pin
140: transfer unit 141: boom
142: transfer cart 143: wheel
144: drive motor 145: rail
150: feeding unit 151: ramp
151a: support 152: first stopper
153: first driving unit 154: second stopper
160: door lift part 161: lift cylinder
161a: piston rod 162: drive chain
163: drive sprocket 164: rotational connecting shaft
165: driven sprocket 166: driven chain
170: recovery unit 171: liner
172: punching plate 173: transfer pipe
173a: outlet 174: transfer screw
175: transfer motor 176,177: sprocket
178: chain 180: exhaust
181: duct 182: filter
190: frame

Claims (8)

A support 110 on which the shot peening processing target 1 is seated;
a cabinet 120 installed to enclose the processing target seated on the support 110;
An injector 130 for performing shot peening by injecting steel balls toward the inside of the processing target 1 with compressed air; and
A conveying unit 140 for conveying the injector 130 along the longitudinal direction from the inside of the object 1 to be processed;
The injector 130,
A main body 131 that allows the steel balls injected by the compressed air to be reflected vertically and left and right by the reflector 131b to be injected into the processing target 1;
The fixing shafts 133 provided on both sides of the main body 131 are installed one pair on both sides by penetrating the part where the "X" crosses, and after adjusting the crossing angle to adjust the height of the main body 131, the Link member 132 for maintaining the cross angle adjusted by the tightening of the tightening nut 134 screwed to the end of the fixed shaft 133;
By installing facing ends of the link members 132 so as to be parallel to the width direction of the main body 131, one pair is provided on the lower side and upper side of the main body 131, respectively, and a length-adjustable shaft 135 capable of adjusting the length ; and
Wheels 136 rotatably installed at both ends of the variable length shaft 135, respectively;
Including, shot peening device. The method of claim 1,
The injector 130,
A fixing bracket 137 fixed to the circumference of the main body 131; and
Support that is fixed by tightening bolts 137a and nuts in a state in which one end is hinged to the fixing bracket 137, and each other end is hinged to each of the link members 132 on both sides of the main body 131 bracket 138;
Further comprising a shot peening device. The method of claim 1,
The transfer unit 140,
A boom 141 connected to the main body 131 of the injector 130;
A transfer cart 142 fixed to the end of the boom 141 and installed to move along a rail 145 installed in the longitudinal direction of the workpiece 1; and
a driving motor 144 providing a driving force for the transfer cart 142 to move along the rail 145;
Including, shot peening device. The method of claim 3,
The drive motor 144,
Shot peening device for providing a driving force for moving the injector 130 at a preset speed so that the roughness of the processing surface of the processing target 1 corresponds to a reference value. The method according to any one of claims 1 to 4,
Further comprising a feeding unit 150 for supplying the processing target 1 to the support 110 and withdrawing the processed target from the support 110 to the outside,
The feeding unit 150,
An inclined table 151 extending on both sides of the support table 110, inclined downward from the supply side to the withdrawal side, and having a support portion 151a for supporting the workpiece 1 at the end of the withdrawal side;
A first stopper 152 installed to temporarily stop the workpiece 1 on the inclined table 151 on the side where the workpiece 1 is supplied to the support 110;
a first driving unit 153 that selectively allows the object to be processed 1 to stop and pass through by operating the first stopper 152;
A second stopper 154 installed to temporarily stop the processing target 1 on the support 110; and
a second driving unit that selectively permits the stop and passage of the object to be processed 1 by operating the second stopper 154;
Including, shot peening device. The method of claim 1,
The cabinet 120,
By providing a door 121 that is opened and closed vertically by the door lifting part 160 on both open sides, the object to be processed 1 is moved through the support 110 by the opening of the door 121 to the cabinet ( 120), and for processing the object (1), both open sides are blocked by the door (121) by the door lifting part (160). The method of claim 6,
The door lifting part 160,
an elevating cylinder 161 installed vertically;
drive chains 162 having one end fixed to the piston rod 161a of the lift cylinder 161 and one end fixed to each door 121;
drive sprockets 163 rotatably installed on the upper side of each of the doors 121 to be connected to each of the drive chains 162;
rotation connecting shafts 164 fixed to each of the drive sprockets 163 and installed parallel to the longitudinal direction of the cabinet 120;
at least one driven sprocket 165 fixed to each of the rotation connecting shafts 164 and installed to rotate together with the drive sprocket 163; and
a driven chain 166 connected to each of the driven sprockets 165 and having an end fixed to the door 121;
Including, shot peening device. The method according to any one of claims 1 to 4,
Further comprising a recovery unit 170 for recovering the steel balls from the cabinet 120,
The recovery unit 170,
A liner 171 installed on the rear of the processing target 1;
a punching plate 172 having a porous structure located on the lower side of the processing target 1 in the support 110 and allowing the steel balls to pass through after processing the processing target 1;
a transfer pipe 173 providing a recovery path for steel balls below the punching plate 172 and having a discharge port 173a at an end thereof;
A transfer screw that is rotatably installed inside the transfer pipe 173 and moves the steel ball supplied to the inside of the transfer tube 173 by rotation toward the outlet 173a along the transfer tube 173 ( 174); and
a transfer motor 175 rotating the transfer screw 174;
Including, shot peening device.

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