KR20120046852A - Shot peening device for tube and control method thereof - Google Patents

Abstract

PURPOSE: A shot peening device for a tube and a control method thereof are provided to obtain a tube with uniform quality by automatically rotating the tube while shot peening the tube. CONSTITUTION: A shot peening device for a tube comprises a main body which sprays shot balls, a moving unit including a feed part for transferring a tube(5) to the main body and an eject part for ejecting a shot-peening completed tube, a clamping unit which presses and rotates both sides of the tube fed along the moving unit to the main body, and a fluid supply unit(110) which supplies fluid to the inside of the tube through the clamping unit.

Description

Shot peening device for tubes and control method thereof {SHOT PEENING DEVICE FOR TUBE AND CONTROL METHOD THEREOF}

The present invention relates to a short pinning apparatus for a tube and a control method thereof, and more particularly, to a short pinning apparatus for a tube and a control method thereof which can improve productivity by automating the short pinning operation of the tube.

In general, shot peening is a kind of cold working in which a shot ball is projected on a surface of a metal object at high speed to hammer the surface of the metal object.

As the shot ball collides with the surface of the metal object at high speed, foreign substances including scales are removed, and irregularities are formed on the surface of the metal object.

The surface of the metal object has a force to maintain the stretched surface layer before it is stretched to generate residual compressive stress, and the inside of the metal object has a tensile stress.

When the compressive residual stress remains on the surface of the metal object material by the short peening, the fatigue life of the metal object is extended until the compressive residual stress gradually cancels and disappears due to the action of cyclic tension.

The shot peening operation is performed by hand, and after the operator puts the metal object including the tube into the short peening apparatus, the metal object is taken out and moved after a certain time.

The above technical configuration is a background art for helping understanding of the present invention, and does not mean a conventional technology well known in the art.

In the shot peening operation of the tube with the side opening, the shot ball flows into the inside of the tube, causing noise, and an additional work is required to remove it, thereby increasing the production cost.

In addition, since the short peening operation is performed while the tube is stopped, the quality of the tube is non-uniform and durability is degraded. Therefore, there is a need for improvement.

The present invention has been made by the necessity as described above, and an object thereof is to provide a shot peening device for a tube and a control method thereof, which can prevent the shot ball from flowing into the tube.

In addition, an object of the present invention is to provide a short pinning apparatus for a tube and a control method thereof, which can improve durability because the short pinning operation is performed while the tube is automatically rotated.

The short pinning apparatus for a tube according to the present invention includes: a moving part including a main body portion to which the shot ball is injected, a supply portion for transferring the tube to the main body portion, and a withdrawal portion for withdrawing the short peening tube from the main body portion; Therefore, it includes a gripping portion for pressing and turning both sides of the tube supplied to the main body portion and a fluid supply portion for supplying fluid into the tube through the gripping portion.

The gripping portion preferably includes a gripping arm portion for holding the tube, a rotating portion for rotating the gripping arm portion, and a horizontal moving portion for horizontally moving the rotating portion.

In addition, the gripping arm is provided on the inside of the gripping bracket and the gripping bracket having a rotating shaft member connected to the rotating part and the rotating shaft member, and the mounting space on the inside and the inside of the gripping bracket in contact with the opening side of the tube elastic support It is preferable to include a cushion pressing unit.

In addition, the fluid supply unit is installed to surround one side of the rotating shaft member and the fluid housing in which the fluid is supplied to the inside, and the inlet hole and the inlet hole for supplying fluid to the inner side of the rotating shaft member located inside the fluid housing and in communication with the inner side of the rotating shaft member And it is preferable to include a supply pipe through the gripping bracket and the cushion pressing portion to form a pipe in communication with the inside of the tube.

In addition, it is preferable that a plurality of inflow holes are provided along the circumference of the rotating shaft member.

In addition, the cushion pressing portion is inserted into the mounting space of the pressing housing and the inner projection member and the outer projection member having an inner projection member which is rotated like a gripping bracket and inserted into the inner tube and the outer projection member is installed to surround the outer side of the tube. It is preferred to include an elastic member provided between and in contact with the tube.

In addition, the inner protrusion member is provided with an inner inclined surface for guiding the inside of the end of the tube, the outer protrusion member is preferably provided with an outer inclined surface for guiding the outside of the end of the tube.

The control method of the short pinning apparatus for a tube according to the present invention includes: a tube feeding step in which a tube is transferred to an inner side of a main body along a feeding part, a tube holding step in which a horizontal arm is operated to hold both sides of the tube; It includes a fluid supply step of supplying fluid to the inside of the tube through the gripping arm, a rotating step of rotating the tube to operate the shot ball shot spraying step of spraying the shot ball to the surface of the tube.

In addition, in the tube gripping step, both sides of the tube are preferably gripped in contact with the elastic member located between the inner and outer projection members.

In addition, the fluid supply step, the first supply step of supplying fluid to the fluid housing surrounding the gripping arm portion, the second supply step of moving the fluid to the inside of the rotating shaft member through the inlet hole of the rotating shaft member rotated inside the fluid housing And a third supply step of supplying fluid to the inside of the tube through the inside of the rotating shaft member, the gripping bracket, and the cushion pressing unit through a supply pipe communicating with the inflow hole.

In the short peening apparatus for a tube and a control method thereof according to the present invention, during a short peening operation, fluid is supplied to the inside of the tube through the fluid supply unit, and at the same time, the elastic member elastically presses both sides of the tube to open the inside of the tube. Since shortball entry is prevented, the shortball removal operation can be omitted, thereby reducing the production cost.

In addition, in the present invention, since the short peening operation of the tube is automatically performed, the working time can be shortened to improve productivity.

In addition, according to the present invention, since the shot peening operation is performed while rotating the tube, the quality of the tube can be improved.

1 is a perspective view schematically showing a short peening device for a tube according to an embodiment of the present invention.
FIG. 2 is an enlarged perspective view of part 'A' shown in FIG. 1.
3 is an exploded perspective view showing a gripper according to an embodiment of the present invention.
Figure 4 is a perspective view schematically showing a state in which the gripping portion gripping the tube according to an embodiment of the present invention.
5 is a front view schematically showing a state before the gripping portion grips the tube according to an embodiment of the present invention.
6 is a front view schematically showing a state in which the gripping portion is operated to grip the tube according to an embodiment of the present invention.
7 is a front view showing the main configuration of the fluid supply unit according to an embodiment of the present invention.
8 is a cross-sectional view taken along line “BB” of FIG. 7.
9 is a block diagram of a short peening device for a tube according to an embodiment of the present invention.
10 is a flowchart illustrating a method of controlling a shot peening device for a tube according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a short pinning apparatus for a tube according to the present invention. For convenience of description, a short peening device for a tube installed in an automotive parts factory will be described as an example. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a perspective view schematically showing a short pinning apparatus for a tube according to an embodiment of the present invention, Figure 2 is an enlarged perspective view of the portion 'A' shown in Figure 1, Figure 3 is a view of the present invention 4 is an exploded perspective view illustrating a gripper according to an embodiment, and FIG. 4 is a perspective view schematically illustrating a gripper tube holding state according to an embodiment of the present invention, and FIG. 5 is according to an embodiment of the present invention. FIG. 6 is a front view schematically showing a state before a gripping portion grips a tube, and FIG. 6 is a front view schematically showing a state in which a gripping portion is operated to hold a tube according to an embodiment of the present invention, and FIG. 8 is a cross-sectional view illustrating a main portion of a fluid supply unit according to an embodiment, and FIG. 8 is a cross-sectional view taken along the line “BB” of FIG. 7, and FIG. 9 is a block diagram of a short peening device for a tube according to an embodiment of the present invention. to be.

As shown in FIGS. 1 to 9, the shot peening apparatus 1 for a tube according to an embodiment of the present invention includes a main body 10 and a main body 10 through which the shot ball 18 is injected. The moving part 20 including the supply part 30 which conveys the tube 5, the withdrawal part 40 which draws out the tube 5 which completed the shot peening from the main body part 10, and the moving part 20 A fluid supply unit 110 for supplying a fluid to the inside of the tube 5 through the holding unit 50 and the holding unit 50 by pressing both sides of the tube 5 to be supplied to the main body 10 along the Include.

As the tube 5 short-pinned by the main body 10 according to an embodiment, the tube 5 having both end portions 7 opened in a rectangular tube shape is used. Tube 5 according to another embodiment of the present invention may be a tube of various shapes including a torsion beam-shaped circular tube.

An apparatus for spraying the shot ball 18 is provided inside the main body 10, and main body doors 12 are provided on both sides of the main body 10 (refer to left and right in FIG. 1).

The main body door 12 is moved up and down by the driving of the door cylinder 16, and opens and closes the inlet and the outlet of the main body part 10.

The door cylinder 16 for moving the body door 12 up and down is fixed to the support frame 17 fixed to the body part 10.

Since the auxiliary door 14 is installed on the side of the main body 10, when an abnormality occurs in the main body 10, the operator can open the auxiliary door 14 and perform maintenance work.

The moving part 20 provided in front of the main-body part 10 (the left reference based on FIG. 1) is the supply part 30 which supplies the tube 5 to the main-body part 10, and the tube 5 from the main-body part 10 ) Includes a lead portion 40 for moving outward.

The supply unit 30 includes a first fixed frame 36 which is fixedly installed, and a first moving frame 32 which moves inside the first fixed frame 36 and the main body unit 10.

First mounting jigs 34 supporting both sides of the tube 5 are installed at both sides of the first moving frame 32. The first moving frame 32 is moved to the inside of the main body 10 from the first fixed frame 36, the first moving frame 32 or the second moving frame 42 inside the main body 10 Lifting section (not shown) is provided to raise and lower the.

In order to mount the plurality of tubes 5 to the first moving frame 32, a plurality of first mounting jigs 34 are provided on both sides of the first moving frame 32.

The lead-out part 40 which draws out the tube 5 from the main body 10 moves the inside of the second fixed frame 46 and the second fixed frame 46 and the main body 10 fixedly installed. A second moving frame 42 is included.

The second moving frame 42 is provided with a second mounting jig 44 on which the tube 5 is mounted, and the second moving frame 42 is moved to the main body 10 to complete the shot peening tube 5. Received and transferred to the outside.

The gripping portion 50 which is turned while holding both sides of the tube 5 transferred to the main body portion 10 is a gripping arm portion 55 for gripping the tube 5 and a rotating portion for rotating the gripping arm portion 55. 70 and a horizontal moving part 90 for horizontally moving the rotating part 70 (hereinafter referred to in FIG. 4) and a horizontal moving part 90 provided below the horizontal moving part 90 and supporting the horizontal moving part 90 in a horizontal direction. It includes a fine control unit 100 to adjust to.

The gripping arm 55 elastically supports the open sides of the tube 5 to prevent the shot ball 18 from flowing into the tube 5.

The gripping arm part 55 according to an embodiment includes a gripping bracket having a rotating shaft member 56 that is axially connected to the rotating part 70, and a mounting space 58 installed on one side of the rotating shaft member 56. 57 and a cushion pressing part 60 installed inside the grip bracket 57 and elastically supporting the tube 5 in contact with an opening side of the tube 5.

The cushion pressing unit 60 according to an embodiment is inserted into the mounting space 58 and rotated together with the grip bracket 57, and the inner protrusion member 62 and the tube 5 inserted into the inside of the tube 5. An elastic member 66 which is installed between the pressure housing 61 and the inner protrusion member 62 and the outer protrusion member 64 having an outer protrusion member 64 installed to surround the outer side of the tube 5 and is in contact with the tube 5. It includes.

The inner protrusion member 62 has an inner inclined surface 63 for guiding the inside of the end 7 of the tube 5, and the outer protrusion member 64 has an outer guiding outside the end 7 of the tube 5. Since the inclined surface 65 is provided, the end 7 of the tube 5 is guided in contact with the elastic member 66 located between the inner inclined surface 63 and the outer inclined surface 65.

The elastic member 66 is made of urethane (Urethane) having excellent abrasion resistance, oxidation resistance and maintenance resistance, and the pressure housing 61 including the inner protrusion member 62 and the outer inclined surface 65 is made of steel as a main material. .

When the cushion pressing portion 60 is pressed to both open sides of the tube 5, both end portions 7 of the tube 5 are elastically supported in contact with the elastic member 66.

Since the elastic member 66 elastically deformed according to the shape of both end portions 7 of the tube 5 surrounds both end portions 7 of the tube 5, the inside of the tube 5 is sealed to short circuit 18. ) Is prevented from entering.

In addition, the inner protrusion member 62 protruding from the cushion pressing part 60 is caught by the inner side of the tube 5 to prevent the tube 5 from flowing down. The inner protrusion member 62 is formed to protrude outward from the center of the cushion pressing portion 60, and may be formed in various shapes within the technical concept of minimizing friction with the tube (5).

The cushion pressing unit 60 is coupled to a grip bracket 57 having a mounting space 58, and the grip bracket 57 is connected to the rotary shaft member 56 to receive rotational power.

The rotating unit 70 which is axially connected to the rotating shaft member 56 to supply rotational power includes a driving motor member 72 and a base member 75 supporting the driving motor member 72.

The drive motor member 72 is operated by a control signal to rotate and stop the gripping arm 55, and various rotating devices can be used within the technical concept of having quick response.

The drive motor member 72 according to one embodiment uses a servo motor having a range of fast response and wide speed control.

In order to sense the directionality of the tube (5) held by the gripping arm (55), the sensor member for sensing the position of the member to be measured 77 and the member to be rotated by the operation of the drive motor member 72 78 is installed.

The member to be measured 77 is installed in a protruding shape on a plate that is rotated in conjunction with the operation of the driving motor member 72.

The sensor member 78 for measuring the member under measurement 77 is a proximity sensor installed in the sensor bracket 79 having a long hole, and sensing is performed when the member 77 under measurement passes the sensor member 78. .

The horizontal moving part 90 for horizontally moving the grip arm 55 and the rotating part 70 includes a rod member 94 connected to the rotating part 70 and a cylinder member 92 for reciprocating the rod member 94. Include.

One end of the rod member 94 is formed in a polygonal shape, and the mounting hole 82 is formed in a shape corresponding to one end of the rod member 94 also inside the connection member 80 coupled thereto.

The rod member 94 is moved by the operation of the cylinder member 92, and the connection member 80 fixed to the rod member 94 is fixed to the lower side of the base member 75.

The cylinder member 92 is fixed to the moving body portion 96, and the first rail member 98 for guiding the movement of the rotating part 70 is provided on the upper side of the moving body portion 96 facing the base member 75. Is installed.

Since the base member 75 is provided with a first holder portion 76 surrounding the first rail member 98, the rotation part 70 is moved in the horizontal direction along the first rail member 98.

The fine control unit 100 for adjusting the support position of the horizontal moving unit 90 is installed below the horizontal moving unit 90.

The micro-adjustment unit 100 according to the embodiment includes a mounting member 107 including an inner hole 108 fixed to the horizontal moving unit 90 and formed with a female thread, and a male screw fastened to the inner hole 108. It includes a screw bar 104 and a rotating driving member 102 for rotating the screw bar 104 is formed.

The rotary drive member 102 is fixed to one side of the fixed body portion 106 fixed to the main body portion 10, the screw bar 104 is connected to the rotary drive member 102 to receive power is fixed body portion ( 106).

The mounting member 107 to which the inner hole 108 is connected to the screw bar 104 is fixed to the lower side of the moving body portion 96 to constrain the rotation.

A second rail member 109 is provided on the upper side of the fixed body part 106, and a second holder part 99 surrounding the second rail member 109 is provided below the moving body part 96.

With the gripping arm 55 holding the end 7 of the tube 5, the fluid supply 110 is operated to supply fluid to the inside of the tube 5 so that the pressure inside the tube 5 is increased. (5) It is formed higher than the outside pressure to prevent the inlet of the shot ball (18).

The fluid supply unit 110 according to the exemplary embodiment includes a fluid housing 113 which surrounds one side of the rotation shaft member 56 and is supplied with fluid, and a rotation shaft member 56 positioned inside the fluid housing 113. In communication with the inlet hole (114) and the inlet hole (114) for supplying the fluid into the inner side of the rotating shaft member 56 and penetrates the grip bracket (57) and the cushioning pressure portion (60) of the tube (5) It includes a supply pipe 115 to form a pipe communicating with the inside.

The fluid generator 111 supplying the fluid by the operation of the controller 120 is connected to the fluid housing 113 through the fluid supply passage 112.

The high pressure fluid is supplied to the inner side of the fluid housing 113 through the fluid supply line 112, and the rotating shaft member 56 is installed through the fluid housing 113.

The supply pipe 115 formed inside the rotating shaft member 56 positioned inside the fluid housing 113 passes through the gripping bracket 57 and the cushion pressing portion 60 to communicate with the inside of the tube 5. .

In order to communicate the inside of the supply passage 115 and the fluid housing 113, a plurality of inlet holes 114 are provided from the outside of the rotary shaft member 56 toward the inside.

Since the inlet hole 114 is provided along the circumference of the rotary shaft member 56, the high pressure fluid inside the fluid housing 113 can be easily moved to the supply pipe 115 through the inlet hole 114. have.

The controller 120 determines the position of the tube 5 by receiving the measured value of the sensor member 78, and adjusts the position of the gripping arm 55 by operating the rotary driving member 102 and the cylinder member 92. In addition, the driving motor member 72 is operated to rotate the gripping arm portion 55 and the tube 5, and the fluid supply unit 110 is operated to supply fluid to the inside of the tube 5.

The fluid according to an embodiment uses air compressed at high pressure and increases the pressure inside the tube 5 to block the inflow of the shot ball 18 into the tube 5. Can be used as the fluid.

Hereinafter, with reference to the accompanying drawings will be described in detail the control method of the shot peening device 1 for a tube according to an embodiment of the present invention.

10 is a flowchart illustrating a method of controlling a shot peening device for a tube according to an embodiment of the present invention.

As shown in Figure 1 to 10, the control method of the shot peening device 1 for a tube according to an embodiment of the present invention, the fine adjustment unit 100 is operated to support the horizontal moving unit 90 Has a support position adjusting step to adjust the position. (S10)

Before the gripping portion 50 grips the tube 5, the distance between the gripping arm portions 55 facing the length of the tube 5 is adjusted.

To this end, when the rotation driving member 102 is rotated to rotate the screw bar 104, the mounting member 107 is moved along the screw bar 104, the horizontal moving portion 90 also the second rail member 109 Is moved along.

When the distance between the grip arm 55 is adjusted according to the tube 5, the rotation of the rotary drive member 102 is stopped to set the position where the horizontal moving unit 90 is supported.

When the support position adjustment step is completed, the tube (5) has a tube supply step to be transferred to the inner side of the body portion 10 along the supply unit 30. (S20)

The tube 5 moves to the inside of the main body 10 together with the first moving frame 32 in a state where it is mounted on the first mounting jig 34 of the supply part 30.

When the tube supplying step is completed, the horizontal moving unit 90 is operated to have a gripping arm 55 holding the both sides of the tube (5) (S30).

When the movement of the first moving frame 32 to the inside of the main body 10 is completed, the cylinder member 92 is operated to advance the rod member 94.

As the rod member 94 advances, the connecting member 80, the rotating unit 70, and the gripping arm unit 55 also advance.

Both sides of the tube 5 are sealed in contact with the elastic member 66 positioned between the inner protrusion member 62 and the outer protrusion member 64 to prevent the inflow of the short ball 18.

After the gripping arm portion 55 grips both sides of the tube 5, the supply portion 30 descends and moves to the outside of the main body portion 10, and the door cylinder 16 operates to lower the main body door 12. do.

The tube 5 having various diameters or shapes may be supported by the cushion pressing unit 60 by elastic support of the elastic member 66.

In addition, the tube 5 having various lengths may be supported by the grip arm part 55 because the position of the horizontal moving part 90 and the grip arm part 55 is changed by the operation of the microadjustment part 100.

It has a fluid supply step of supplying a fluid to the inside of the tube (5) through the grip arm portion 55. (S40)

The fluid supplying step according to an embodiment has a first supplying step of supplying a fluid to the fluid housing 113 surrounding the gripping arm part 55.

In a state where the cushion pressing unit 60 grips both sides of the tube 5, the control unit 120 operates the fluid generating unit 111 to transfer the fluid to the fluid housing 113 through the fluid supply line 112. Supply.

After the first supplying step, the fluid has a second supplying step through which the fluid is moved to the inside of the rotating shaft member 56 through the inlet hole 114 of the rotating shaft member 56 that is rotated inside the fluid housing 113.

Since the pressure of the fluid inside the fluid housing 113 is higher than the pressure of the supply passage 115 installed inside the rotating shaft member 56, the fluid in the fluid housing 113 may pass through the inlet hole 114. It is moved to the supply pipe 115 through.

After the second supply step, the tube 5 of the inside of the rotary shaft member 56 and the grip bracket 57 and the cushion pressing portion 60 through the supply passage 115 in communication with the inlet hole 114 of the tube (5) And a third supply step of supplying fluid to the inside.

The fluid introduced through the inlet hole 114 is moved through the supply pipe 115, and is introduced into the inner side of the sealed tube 5 by the cushion pressing unit 60.

A part of the fluid filled inside the tube 5 pushes the elastic member 66 and leaks to the outside of the tube 5, so that the shot ball 18 that is to flow between the tube 5 and the elastic member 66 is introduced. ) To prevent secondary inflow.

When the tube gripping step and the fluid supplying step are completed, the sensing step of measuring the mounting direction of the tube (5) (S50).

Since the sensor member 78 senses the position of the member 77 to be measured, the orientation of the tube 5 mounted to the gripping arm portion 55 can be known.

When the sensing step is completed, the rotating unit 70 is operated to have a rotating step of rotating the tube (5) (S60).

Rotational power generated by the operation of the drive motor member 72 is transmitted to the gripping arm 55. The tube 5 also rotates by the rotation of the gripping arm part 55 holding both sides of the tube 5.

The shot ball spraying step of spraying the shot ball 18 to the surface of the tube (5) (S70).

The apparatus for injecting the shot ball 18 inside the main body 10 is operated to inject the shot ball 18 to the outside of the tube (5).

Since the tube 5 is rotated in the main body 10, the shot ball 18 is uniformly sprayed on the outside of the tube 5.

The injection of the shot ball 18 and the rotation of the tube 5 may be performed at the same time, and various modifications are possible, such as the shot ball 18 may be injected and the tube 5 may be rotated.

And a rotation stop step of stopping the rotation of the tube 5 in the mounting direction of the tube 5 measured in the sensing step.

For example, when the tube 5 is mounted on the gripping arm 55, if the position of the member to be measured 77 is facing upward (refer to Fig. 3), when the rotation of the tube 5 is stopped, blood The drive motor member 72 is stopped so that the position of the measuring member 77 faces upward.

As a result, when the tube 5 having the welding line or the tube 5 formed in the torsion beam shape is moved, the tube 5 is moved in a directional manner to facilitate the movement and sorting of the tube 5. can do.

When the rotation stop step is completed, the horizontal moving unit 90 is operated to have a tube unloading step in which the gripping arm unit 55 is spaced apart from the tube 5 (S90).

When the rod member 94 moves backward (right of FIG. 3) by the operation of the cylinder member 92, the rotating unit 70 moves backward along the first rail member 98.

Since the holding arm part 55 which cooperates with the rotating part 70 is also spaced apart from both sides of the tube 5, the tube 5 is the 2nd mounting jig | tool of the 2nd moving frame 42 moved inward of the main body part 10. As shown in FIG. Is put at 44.

When the tube unloading step is completed, the tube 5 has a tube withdrawal step that is transported to the outside of the body portion 10 along the lead portion 40. (S100)

The second moving frame 42 moves from the inner side of the main body 10 to the outer side of the main body 10 in the state in which the tube 5 is raised, and transfers the tube 5 where the shot peening is completed to the outer side of the main body 10.

According to the configuration as described above, according to the tube short peening device 1 and the control method according to an embodiment, the fluid is supplied to the inside of the tube (5) through the fluid supply unit 110 during the short peening operation At the same time, since the elastic member 66 elastically pressurizes the open sides of the tube 5 to prevent the shot ball 18 from entering the tube 5, the short ball 18 is eliminated, thereby eliminating production costs. Can be reduced.

In addition, since the short peening operation of the tube 5 is automatically performed, the working time can be shortened to improve productivity, and the short peening operation is performed while rotating the tube 5, thereby improving the quality of the tube 5. Can be.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. I will understand.

In addition, the short pinning apparatus for a tube installed in an automotive parts factory has been described as an example, but this is merely illustrative, and the short pinning apparatus for a tube according to the present invention may be used in another factory for producing a tube.

Therefore, the true technical protection scope of the present invention will be defined by the claims.

1: Short peening device for tubes
5: tube 7: end
10: main body 18: short ball
20: moving part 30: supply part
40: drawing part 50: holding part
55: grip arm 56: rotary shaft member
57: grip bracket 58: mounting space
60: cushion pressing portion 61: pressure housing
62: inner protrusion member 63: inner inclined surface
64: outer protrusion member 65: outer inclined surface
66: elastic member 70: rotating part
72: drive motor member 77: member to be measured
78: sensor member 90: horizontal moving part
92: cylinder member 94: rod member
100: fine adjustment unit 102: rotary drive member
104: screw bar 106: fixed body portion
110: fluid supply section 111: fluid generating section
112: fluid supply line 113: fluid housing
114: inlet hole 115: supply line
120: control unit

Claims (10)

Body part to which the shot ball is injected;
A moving part including a supply part for transferring the tube to the main body part, and a withdrawal part for drawing out the tube in which the short pinning is completed in the main body part;
A holding part for pressing and turning both sides of the tube supplied to the main body part along the moving part; And
And a fluid supply part for supplying a fluid to the inside of the tube through the gripping part.
The method of claim 1, wherein the gripping portion,
A gripping arm portion for holding the tube;
A rotating part for rotating the gripping arm part; And
Short pinning device for a tube, characterized in that it comprises a horizontal moving unit for moving the rotating portion horizontally.
The method of claim 2, wherein the gripping arm portion,
A rotating shaft member axially connected to the rotating part;
A gripping bracket installed on one side of the rotating shaft member and having a mounting space therein; And
The short pinning apparatus for the tube, which is installed inside the gripping bracket, and comprises a cushioning press for elastically supporting the tube in contact with an opening side of the tube.
According to claim 3, The fluid supply unit,
A fluid housing installed to surround one side of the rotating shaft member and supplied with fluid;
An inlet hole for supplying a fluid to the inside of the rotating shaft member located inside the fluid housing; And
And a supply passage communicating with the inflow hole, the supply passage passing through an inner side of the rotating shaft member, the grip bracket, and the cushion pressing unit to communicate with an inner side of the tube.
The method of claim 4, wherein the inlet is,
Short pinning apparatus for a tube, characterized in that provided with a plurality along the circumference of the rotating shaft member.
According to any one of claims 3 to 5, wherein the cushion pressing unit,
A pressure housing having an inner protrusion member inserted into the mounting space and rotating like the gripping bracket, and inserted into an inner side of the tube and surrounding the outer side of the tube; And
Short pinning device for a tube, characterized in that it is provided between the inner and outer projection members, the elastic member in contact with the tube.
The method according to claim 6,
The inner projection member is provided with an inner inclined surface for guiding the inside of the end of the tube, the outer projection member is a short peening device for a tube, characterized in that provided with an outer inclined surface for guiding the outer end of the tube.
A tube feeding step of feeding the tube into the main body along the supply part;
A tube gripping step in which a horizontal moving part is operated so that the gripping arm grips both sides of the tube;
A fluid supplying step of supplying a fluid to the inside of the tube through the grip arm;
A rotating step of rotating the tube by operating a rotating part; And
And a shot ball spraying step of injecting the shot ball onto the surface of the tube.
The method of claim 8, wherein the tube holding step,
And both sides of the tube are held in contact with an elastic member positioned between the inner and outer protruding members.
The method of claim 8, wherein the fluid supply step,
A first supplying step of supplying a fluid to a fluid housing surrounding the gripping arm;
A second supplying step in which the fluid is moved to the inside of the rotating shaft member through an inlet hole of the rotating shaft member rotating inside the fluid housing; And
And a third supply step of supplying a fluid to the inside of the tube through the inside of the rotary shaft member, the gripping bracket, and the cushion pressurizing unit through a supply pipe communicating with the inflow hole. Control method.

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