WO2013054915A1

WO2013054915A1 - Pinning device

Info

Publication number: WO2013054915A1
Application number: PCT/JP2012/076515
Authority: WO
Inventors: 充半田; 省悟佐々木
Original assignee: 東洋精鋼株式会社
Priority date: 2011-10-14
Filing date: 2012-10-12
Publication date: 2013-04-18
Also published as: JP5719032B2; JPWO2013054915A1

Abstract

A pinning device (10) comprises: a first housing (12) which is held by an operator; a tool holding member (30) which is attached to the first housing (12) and holds a tool (40) at the tip end thereof; a striking member (19) for striking a rear end (34) of the tool holding member (30); drive mechanisms (20, 28, 26) for driving the striking member (19); and a pressure display unit (50) for displaying the force with which the operator presses the tool (40) against a pinning point.

Description

Peening device

This specification discloses a peening apparatus.

In order to improve mechanical properties such as fatigue strength, peening treatment is applied to the surface of welded parts and machine parts. Japanese Patent Application Laid-Open No. 2011-125978 discloses an example of a peening apparatus used for peening processing.

In order to strictly control the quality of the peening process, it is necessary to make the mechanical energy given to the peening site by one shot substantially constant. However, in a peening apparatus that an operator holds and operates, the mechanical energy applied to the peening site may change depending on the operation mode of the operator. That is, in the case of a peening apparatus in which the operator presses the tool against the peening site and the peening process is performed, when the force of pressing the operator's tool against the peening site changes, the mechanical energy applied to the peening site also changes accordingly. To do. For this reason, such a peening apparatus has not been used for applications that require strict management of the quality of the peening process.

The present specification relates to a peening apparatus in which an operator applies a peening process while pressing a tool against a peening part, and the mechanical energy applied to the peening part by a single hit can be made substantially constant. Is disclosed.

A peening apparatus disclosed in the present specification strikes a first housing that is gripped by an operator, a tool holding member that is attached to the first housing and holds a tool at a front end thereof, and a rear end of the tool holding member. A striking member, a drive mechanism that drives the striking member, and a pressing force display unit that displays the force with which the operator presses the tool against the peening site.

When performing the peening process with this peening apparatus, the operator holds the first housing and presses the tool held by the tool holding member against the peening site. In this state, the driving source is driven to drive the striking member, and the rear end of the tool holding portion is hit with the striking member. Thereby, mechanical energy is given to a peening site | part via a tool from a tool holding part. Here, since the force with which the operator presses the tool against the peening site is displayed on the pressing force display section, the operator operates the peening apparatus so that the force with which the tool is pressed against the peening site is substantially constant. can do. As a result, the mechanical energy imparted to the peening site by a single impact can be made substantially constant. Therefore, this peening apparatus can also be used for applications where it is necessary to strictly control the quality of the peening process.

The figure which shows schematic structure of the peening system of an Example. Sectional drawing of a peening apparatus. The figure which shows the structure of a flow control part. The block diagram which shows the structure of the control system of a peening system. The perspective view of a striking pin. The perspective view of another hit | damage pin. Sectional drawing of the peening apparatus which concerns on a modification (state before a press). FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7. Sectional drawing of the peening apparatus which concerns on a modification (state after a press).

In the peening apparatus disclosed in the present specification, the pressing force display unit is attached to the rear end of the first housing and to the other end of the elastic member. You may have the 2nd housing displaced with respect to 1 housing, and the displacement amount display part which displays the displacement amount of the 2nd housing with respect to the 1st housing. In such a configuration, the operator grasps the first housing with one hand, grasps the second housing with the other hand, and presses the second housing toward the peening portion, thereby the tip of the tool holding member. Press the tool held in the peening site. Here, when the second housing is pressed toward the peening portion, the elastic member is deformed by the pressing force, and the second housing is displaced with respect to the first housing according to the deformation amount. Since the deformation amount of the elastic member depends on the pressing force, the displacement amount of the second housing also becomes a value corresponding to the pressing force. Therefore, the operator can maintain the force for pressing the tool against the peening site substantially constant by performing the operation while confirming the amount of displacement of the second housing.

In the above peening apparatus, a vibration absorbing member may be disposed between the first housing and the second housing. In this case, when the second housing moves toward the first housing, the second housing may contact the first housing via the vibration absorbing member. According to such a structure, it can suppress that the vibration at the time of a striking member striking a tool holding part being transmitted to a 2nd housing, and, thereby, it can suppress that a vibration is transmitted to an operator.

In the above peening apparatus, the drive mechanism may drive the striking member with air supplied from an air supply source. In this case, the first housing is formed with an exhaust passage for exhausting at least part of the air supplied from the air supply source to the drive mechanism, and the tool held by the tool holding member has an exhaust passage. It is preferably cooled by the flowing air. According to such a configuration, since the tool is cooled by the air exhausted from the drive mechanism, overheating of the tool can be prevented.

The first housing includes a main body to which the tool holding member is attached, and a gripping member that is slidably attached to the surface of the main body in the longitudinal direction of the tool holding member and is gripped by an operator. Also good. According to such a structure, since the holding member hold | gripped by the operator can slide with respect to a main body, it can suppress that a vibration is transmitted to an operator from the 1st housing.

Further, in one aspect of the peening apparatus described above, the second housing may be formed with a recess in which a rear end portion of the first housing is fitted. The second housing may be slidably attached to the first housing in the longitudinal direction of the tool holding member by fitting the rear end portion of the first housing into the recess of the second housing. In this case, the displacement amount display unit may be a mark formed on the outer surface of the first housing. According to such a configuration, since the rear end portion of the first housing is accommodated in the recess of the second housing, the peening apparatus can be made compact while enlarging the second housing that is held by the operator.

The peening system 100 according to the first embodiment performs a peening process using air (compressed air) supplied from an air supply source. As shown in FIG. 1, the peening system 100 according to the first embodiment includes a peening device 10, a flow control device 60 that controls the pressure and flow rate of air supplied to the peening device 10, and a control that controls the flow control device 60. A device 76 is included. The peening apparatus 10 is connected to a flow rate control device 60 by an air pipe 62a, and the flow rate control apparatus 60 is connected to an air supply source (not shown) by an air pipe 62b. Therefore, the air from the air supply source is supplied to the peening apparatus 10 via the flow rate control device 60.

As shown in FIG. 2, the peening apparatus 10 includes a first housing 12, a striking rod 30 (corresponding to a tool holding member in the claims) attached to the first housing 12, a second housing 44, and the like. ing. The 1st housing 12 is comprised by the cylindrical main body 12a and the holding part 12b attached to the outer peripheral surface of the main body 12a. The main body 12a is a cylindrical member having a tapered tip, and an internal space 14 is formed therein. The front end of the internal space 14 is opened, while the rear end of the internal space 14 is closed by a mounting plate 42. A suction port 16 is formed in the main body 12a. One end of an air pipe 62 a is connected to the suction port 16. Therefore, the air supplied from the air supply source is supplied to the suction port 16 of the main body 12a. The grip portion 12b is disposed in a groove 13 formed on the outer peripheral surface of the main body 12a. The dimension of the groove 13 in the x-axis direction (longitudinal direction of the main body 12a) is larger than the dimension of the grip portion 12 in the x-axis direction. For this reason, the grip part 12 can slide in the x-axis direction in the groove 13.

In the internal space 14 of the first housing 12, a striking rod 30, a piston 19 that strikes the striking rod 30 (corresponding to a striking member in the claims), and a drive mechanism that drives the piston 19 (in this embodiment, a cylinder) A member 20, an elastic member 28, and a cap 26). The cylinder member 20 is a bottomed cylindrical member, and the bottom surface thereof is fixed to the mounting plate 42. An internal space 22 is formed inside the cylinder member 20. An intake hole 18 and an exhaust hole 24 are formed in the cylinder member 20. The intake hole 18 and the exhaust hole 24 penetrate the cylinder member 20 from the outside to the inside. The intake hole 18 is disposed on the rear end side of the cylinder member 20, and the exhaust hole 24 is disposed on the front end side of the cylinder member 20. The intake hole 18 communicates with the intake port 16 of the first housing 12. Therefore, the air supplied from the air supply source is guided to the internal space 22 of the cylinder member 20 through the suction port 16 and the suction hole 18. The exhaust hole 24 communicates with the internal space 14 of the first housing 12. Therefore, the air in the internal space 22 of the cylinder member 20 is discharged to the internal space 14 of the first housing 12 through the exhaust hole 24.

The piston 19 is accommodated in the internal space 22 of the cylinder member 20. The piston 19 is driven by air supplied to the internal space 22 through the intake hole 18. That is, the piston 19 reciprocates in the internal space 22 in the x-axis direction and strikes the rear end 34 of the striking rod 30. The striking force (mechanical energy) when the piston 19 strikes the striking rod 30 is determined by the flow rate and pressure of the air supplied to the internal space 22. As will be described later, since the flow rate control device 60 controls the flow rate and pressure of the air supplied to the peening device 10 to be constant, the striking force when the piston 19 strikes the striking rod 30 is also constant. To be controlled. When the piston 19 reciprocates in the internal space 22 in the x-axis direction, a part of the air in the internal space 22 is exhausted to the internal space 14 of the first housing 12 through the exhaust hole 24. The air exhausted from the exhaust hole 24 passes through the exhaust passage 15a formed between the first housing 12 and the striking rod 30, and is exhausted from the exhaust port 15b. The exhaust passage 15 a extends in the x-axis direction within the first housing 12, and the exhaust port 15 b is formed at the tip of the first housing 12. For this reason, the air exhausted from the exhaust port 15 b flows toward the tip of the striking rod 30. For this reason, the hit | damage pin 40 hold | maintained at the hit | damage stick | rod 30 can be cooled effectively with the air exhausted from the exhaust port 15b.

The striking rod 30 is disposed at a position to close the front end of the cylinder member 20. The striking rod 30 has a tip projecting forward from the tip of the first housing 12, and a rear end accommodated in the first housing 12. A flange portion 26 is formed on the outer peripheral surface of the striking rod 30. The collar portion 26 is provided on the rear end side of the striking rod 30. The rear surface of the flange portion 26 is in contact with the front end surface of the cylinder member 20. The front surface of the collar portion 26 is in contact with the elastic member 28. The elastic member 28 is held by the cap 26. That is, the elastic member 28 is held in the cap 26 by attaching the cap 26 to the front end of the cylinder member 20. In a state where the cap 26 is attached to the cylinder member 20, the flange portion 26 of the striking rod 30 is sandwiched between the elastic member 28 and the cylinder member 20. This prevents the hitting rod 30 from being detached from the cylinder member 20. As the elastic member 28, rubber formed in a cylindrical shape or a cylindrical coil spring can be used. The elastic member 28 urges the striking rod 30 toward the cylinder member 20 side. For this reason, when the striking rod 30 is hit by the piston 19 and the striking rod 30 moves to the tip side of the first cylinder 12, the elastic member 28 is elastically deformed accordingly. Then, the elastic member 28 urges the striking rod 30 toward the cylinder member 20, and retracts to a position where the striking rod 30 contacts the cylinder member 20.

A mounting hole 36 is formed at the front end of the batting rod 30. The impact pin 40 is attached to the attachment hole 36. When the fixing tool 36 is attached to the front end portion of the striking rod 30, the striking pin 40 is held by the striking rod 30, and the dropping from the striking rod 30 is prevented. As shown in FIG. 5, the tip of the striking pin 40 is formed in a convex curved surface, and its curvature R is in the range of 1.5 mm to 10 mm. By setting the curvature R of the tip of the hitting pin 40 in the range of 1.5 to 10 mm, the peening quality (residual stress, work hardening, surface roughness, appearance, etc.) can be improved.

The hitting pin attached to the mounting hole 36 of the hitting rod 30 is not limited to the hitting pin 40 shown in FIG. 5 and can be changed as appropriate according to its application (the shape of the peening site, etc.). For example, when peening the outer peripheral surface of the cylindrical member, a hitting pin 80 as shown in FIG. 6 can be used. In the hitting pin 80, a plate-like hitting portion 84 is provided at the tip of the shaft portion 82. By using the hitting pin 80, the contact area between the outer peripheral surface of the cylindrical member and the hitting pin 80 increases, and the peening process can be performed efficiently.

The second housing 42 is attached to the attachment plate 42 attached to the rear end of the first housing 12 so as to be able to move forward and backward. Specifically, guide pins 48 a and 48 b are fixed to the mounting plate 42. A second housing 42 is attached to the guide pins 48a and 48b so as to be slidable with respect to the guide pins 48a and 48b. Therefore, the second housing 42 is guided by the guide pins 48 a and 48 b and can move in a direction approaching the first housing 12 and a direction away from the first housing 12.

An elastic member 46 is disposed between the second housing 44 and the mounting plate 42. For the elastic member 46, for example, rubber formed in a cylindrical shape or a cylindrical coil spring can be used. When the second housing 42 is pressed toward the first housing 12, the elastic member 46 is deformed according to the pressing force, and the striking pin 40 is pressed against the peening portion by the pressing force. Since the deformation amount of the elastic member 46 is an amount corresponding to the pressing force, the displacement amount of the second housing 42 is also an amount corresponding to the pressing force. Here, the displacement amount of the second housing 42 is displayed on the displacement amount display section 50 (corresponding to the displacement amount display section in the claims). The displacement amount display unit 50 is a scale for measuring the displacement amount of the second housing 42, and a scale is provided in a range where an appropriate pressing force is obtained. Therefore, by adjusting the pressing force so that the displacement amount of the second housing 42 falls within an appropriate range while the operator looks at the displacement amount display unit 50, the force that presses the striking pin 40 against the peening portion is appropriate. Adjusted to range. On the other hand, when the pressing force that presses the second housing 42 toward the first housing 12 is removed, the elastic member 46 returns to the original shape, and the second housing 42 returns to the original position. As is apparent from the above description, in this embodiment, the second housing 44, the elastic member 46, and the displacement amount display section 50 constitute the “pressing force display section” described in the claims.

The flow rate control device 60 is disposed between the air supply source and the peening device 10, adjusts the pressure and flow rate of the air supplied from the air supply source, and supplies the air having the adjusted pressure and flow rate to the peening device 10. . As shown in FIG. 3, the flow control device 60 has an air pipe 62c having one end connected to the air pipe 62b and the other end connected to the air pipe 62a. The air pipe 62c is provided with a pressure switch 64, a pressure reducing valve 66, a pressure gauge 68, a flow control valve 70, a flow switch 72, and an electromagnetic valve 74 in order from the upstream side. The pressure switch 64 is a sensor that measures the pressure of the air flowing through the air pipe 62c. The output of the pressure switch 64 is input to the control device 76. The pressure reducing valve 66 reduces the pressure of the air flowing through the air pipe 62c. The pressure gauge 68 measures the pressure of the air decompressed by the decompression valve 66. Therefore, the operator can set the pressure of the air supplied to the peening apparatus 10 to a desired value by operating the pressure reducing valve 66 while observing the pressure measured by the pressure gauge 68. The flow control valve 70 controls the flow rate of air flowing through the air pipe 62c. The flow switch 72 is a sensor that measures the flow rate of air adjusted by the flow control valve 70. The output of the flow rate switch 72 is input to the control device 76. The electromagnetic valve 74 is controlled by the control device 76, and opens and closes the air pipe 62c. When the electromagnetic valve 74 is opened, air is supplied to the peening apparatus 10. On the other hand, when the electromagnetic valve 74 is closed, the supply of air to the peening apparatus 10 is stopped.

The control device 76 controls the flow rate control device 60 described above. For the control device 76, for example, a PLC (Programmable Logic Controller) can be used. As shown in FIG. 4, a pressure switch 64, a flow rate switch 72, and an electromagnetic valve 74 are connected to the control device 76. The control device 76 closes the electromagnetic valve 74 when the pressure of the air input from the pressure switch 64 (that is, the pressure of the air flowing through the air pipe 62c) is out of the set range. Accordingly, it is possible to prevent the peening process from being performed when air having an inappropriate pressure is supplied to the peening apparatus 10. The control device 76 closes the electromagnetic valve 74 when the flow rate of air input from the flow rate switch 72 (that is, the flow rate of air flowing through the air pipe 62c) is out of the set range. Accordingly, it is possible to prevent the peening process from being performed when air having an inappropriate flow rate is supplied to the peening apparatus 10.

Next, an operation when the peening process is performed by the peening system 100 described above will be described. To perform the peening process, first, the operator holds the holding portion 12b of the first housing 12 with one hand and holds the second housing 44 with the other hand. Next, the tip of the striking pin 40 is brought into contact with the peening portion, and the second housing 44 is pressed toward the first housing 12, thereby pressing the striking pin 40 against the peening portion. At this time, the impact pin 40 is pressed against the peening portion with an appropriate pressing force by pressing the second housing 44 while checking the displacement amount of the second housing 44 by the displacement amount display unit 50.

Next, the control device 76 opens the electromagnetic valve 74 and supplies air from the air supply source to the peening device 10. As a result, the piston 19 is driven and the piston 19 strikes the rear end 34 of the striking rod 30. As a result, a striking force (mechanical energy) is applied from the striking pin 40 to the peening site. At this time, the pressure and flow rate of the air supplied to the peening device 10 are controlled by the flow rate control device 60, and the force for pressing the worker's striking pin 40 against the peening site is maintained in an appropriate range. For this reason, the impact force (mechanical energy) by one impact is controlled to a substantially constant value.

When the air supply source becomes unstable and the pressure and / or flow rate of air supplied from the air supply source become unstable, the control device 76 closes the electromagnetic valve 74 and the peening process is performed. Do not. That is, when the air supply source becomes unstable and the pressure of air input from the pressure switch 64 is out of the set range, the solenoid valve 74 is closed, and the flow rate of air input from the flow switch 72 is set within the set range. When it comes off, the solenoid valve 74 is closed. This prevents the peening process from being performed in a state where the air supplied to the peening apparatus 10 is unstable.

Furthermore, the grip portion 12 b is slidable with respect to the main body 12 a of the first housing 12, and the second housing 44 is attached to the first housing 12 via an elastic member 46. For this reason, it can suppress effectively that the vibration transmitted to the main body 12a of the 1st housing 12 from the striking pin 40 is transmitted to an operator.

As described above, in the peening system 100 of the present embodiment, the pressure and flow rate of the air supplied to the peening apparatus 10 are controlled to appropriate values, and the operator presses the striking pin 40 against the peening site. The pressing force can be adjusted appropriately. As a result, the impact force per time can be maintained substantially constant, and the quality of the peening process can be strictly managed.

Further, in the peening system 100 of the present embodiment, the pressure and flow rate of air supplied to the peening device 10 are controlled to appropriate values by the flow control device 60, so that the striking force applied from the striking pin 40 to the peening site. Can be prevented from becoming too large. Further, vibration transmitted from the striking pin 40 to the first housing 12 side is prevented from being transmitted to the operator's hand. As a result, the burden on the worker is reduced, and the worker can work for a long time.

Furthermore, in the peening system 100 of this embodiment, even if the air supply source to be used is unstable, if the air flow rate and / or pressure is in an inappropriate range, the air supply to the peening apparatus 10 is not performed. Blocked. For this reason, since peening processing is not performed in a state where peening quality is not ensured, peening quality can be managed well.

Further, in the peening system 100 of the present embodiment, the exhaust gas exhausted from the peening apparatus 10 flows from the tip of the first housing 12 toward the striking pin 40 and prevents the striking pin 40 from being overheated. As a result, seizure of the hitting pin 40 on the hitting rod 30 can be prevented.

Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

For example, in the above-described embodiment, the piston 19 is driven using compressed air, but the drive source for driving the piston is not limited to that using compressed air, and other drive sources (for example, electromagnetic) Can be used.

In the above-described embodiment, the pressing force is indicated by the amount of displacement of the second housing 42 with respect to the first housing 12. However, the pressing force is not limited to such an example. The measured value may be displayed on a display or the like.

Note that the peening process using the peening system 100 described above can be used for various purposes because the peening quality can be strictly managed. For example, it can be used for a peening process performed on a welded part and welded heat-affected part after welding of a bridge, a ship, an automobile chassis, or the like. In this case, the fatigue strength can be improved regardless of the material (steel, aluminum alloy, titanium alloy, etc.) of the peening site. Moreover, it can use for the peening process performed to the corner | angular part and R part of a crankshaft (for motor vehicles and ships), and the heat affected layer after induction hardening. Furthermore, it can also be used for a peening process for removing the bent portion of the stabilizer, the R portion of the aluminum wheel, and the cast nest. Furthermore, it can also be used for a peening process for a modification process (for example, a modification process performed in the manufacturing process of an aluminum cast product) that converts a tensile residual stress applied by a grinder process into a compressive residual stress.

Moreover, the peening apparatus used in the peening system 100 described above can take various forms. For example, a peening apparatus 150 shown in FIGS. 7 to 9 can be used. As shown in FIGS. 7 to 9, in the peening apparatus 150, a “first housing” is constituted by the housing rear end portion 102, the cylinder 124, the housing front end portion 126, and the like. A second housing (104, 105) is attached to the “first housing” so as to be slidable in the longitudinal direction.

The second housing (104, 105) includes a cylindrical main body 104 and a lid 105 that closes the rear end of the main body 104. A housing rear end 102 is accommodated in the main body 104. A plain bearing 122 is disposed between the main body 104 and the rear end portion 102 of the housing. The lid 105 is guided by a guide pin 107 fixed to the rear end portion 102 of the housing. For these reasons, the second housing (104, 105) can slide smoothly with respect to the rear end portion 102 of the housing. A protrusion 114 is formed on the front surface of the lid 105 (the surface facing the rear end 102 of the housing). The protrusion 114 can be in contact with a valve 110 described later.

A vibration absorbing member 116 and a coil spring 118 are disposed between the rear end surface of the housing rear end 102 and the lid 105. The vibration absorbing member 116 is formed of rubber, sponge, or the like, and is fixed to the rear end surface of the housing rear end portion 102. Therefore, when the second housing (104, 105) is pressed against the first housing (102, 124, 126) (FIG. 9), the lid 105 abuts against the vibration absorbing member 116. That is, the lid body 105 abuts against the housing rear end portion 102 via the vibration absorbing member 116. One end of the coil spring 118 is fixed to the rear end surface of the housing rear end 102, and the other end is connected to the lid 105. Therefore, when the second housing (104, 105) is pressed toward the first housing (102, 124, 126), the second housing (104, 105) moves forward according to the pressing force. The pressing force that presses the second housing (104, 105) toward the first housing (102, 124, 126) is a pressing force that presses a hitting pin 140, which will be described later, against the workpiece.

As described above, the “first housing” includes the housing rear end portion 102, the cylinder 124, the housing front end portion 126, and the like. The housing rear end portion 102 includes an air suction portion 123 (see FIG. 9). The air suction part 123 is connected to an air supply source via a flow rate control device (not shown). An air flow path 106 is formed in the housing rear end 102. The housing rear end portion 102 accommodates a valve 110 that opens and closes the air flow path 106 and a spring 112 that urges the valve 110 toward the lid 105. When the lid 105 moves forward, the valve 110 moves forward by being pushed by the protrusion 114 of the lid 105. As a result, the valve 110 opens the suction port of the air flow path 106, and the air from the air suction portion 123 is guided to the air flow path 106. On the other hand, when the lid 105 moves rearward, the valve 110 moves rearward by the biasing force of the spring 112. As a result, the suction port of the air flow path 106 is closed and the air supply to the air flow path 106 is shut off.

The cylinder 124 is attached to the front end of the rear end 102 of the housing. The cylinder 124 is a cylindrical member and accommodates the piston 120 therein. An air flow path 108 is formed in the cylinder 124, and the air flow path 108 is connected to the air flow path 106 formed in the rear end portion 102 of the housing. The piston 120 is driven by the air supplied from the air suction portion 123 to the air flow path 108 via the air flow path 106. When the piston 120 is driven, the piston 120 strikes a rear end 136a of a striking rod 136 (described later). As a result, the hitting pin 140 attached to the tip of the hitting rod 136 hits the workpiece.

A mark 105 is formed on the outer peripheral surface of the cylinder 124. The mark 105 has a function of displaying the amount of displacement of the second housing (104, 105) relative to the first housing (102, 124, 126). That is, when the second housing (104, 105) slides forward with respect to the first housing (102, 124, 126), the tip 103 of the main body 104 of the second housing approaches the mark 105 (see FIG. 9). Therefore, by adjusting the position of the tip 103 of the main body 104 with respect to the mark 105, the position of the second housing (104, 105) relative to the first housing (102, 124, 126) can be adjusted. That is, by adjusting the position of the tip 103 of the main body 104 with respect to the mark 205, the force (worker's force) for pressing the striking pin 140 against the work can be adjusted.

The housing front end 126 is attached to the front end of the cylinder 124. The housing front end 126 is a cylindrical member, and accommodates a striking rod 136 therein. An exhaust passage 142 is formed at the housing front end 126. The air used to drive the piston 120 is exhausted through the exhaust passage 142.

The front end grip portion 128 is attached to the outer peripheral surface of the housing front end portion 126 so as to be slidable in the longitudinal direction. A sliding bearing 130 is disposed between the housing front end 126 and the tip gripping portion 128. As a result, the tip gripping portion 128 can slide smoothly with respect to the housing front end portion 126. The tip gripping portion 128 is supported on the housing front end portion 126 by

springs

132a and 132b.

A striking pin 140 is attached to the tip 136 b of the striking rod 136 by a holder 138. The holder 138 is detachable from the housing front end 126. When the holder 138 is attached to the housing front end portion 126, a space for accommodating the base end portion of the striking pin 140 is formed between the housing front end portion 126 and the holder 138. By accommodating the base end portion of the hitting pin 140 in this space, the hitting pin 140 is attached to the peening apparatus 150. That is, when the holder 138 is detached from the housing front end portion 126, the striking pin 140 can be attached to and detached from the peening apparatus 150. On the other hand, when the holder 138 is attached to the housing front end 126 with the striking pin 140 in contact with the striking rod 136, the base end of the striking pin 140 is accommodated in the space between the housing front end 126 and the holder 138. The hitting pin 140 is prevented from falling off from the peening device 150. Note that an exhaust passage 144 is formed in the holder 138. The exhaust flow path 144 is connected to the exhaust flow path 142 of the housing front end portion 126. Accordingly, the air exhausted from the peening apparatus 150 is exhausted from the tip of the holder 138 to the outside.

As is clear from the above description, in the peening apparatus 150, a part of the first housing (102, 124, 126) (specifically, the rear end portion 102 of the housing) is accommodated in the second housing (104, 105). Is done. For this reason, it can suppress that the peening apparatus 150 enlarges, enlarging the area of the part which an operator hold | grips. Further, the displacement of the second housing (104, 105) relative to the first housing (102, 124, 126) is a mark 105 (in detail, formed on the outer peripheral surface of the first housing (102, 124, 126)). This is indicated by the mark 105) of the cylinder 124. For this reason, a displacement amount display unit is provided near the hitting pin 104, and the operator easily checks the amount of displacement of the second housing (104, 105) (that is, the pressing force of the hitting pin 104). be able to.

In the peening apparatus 150, the vibration absorbing member 116 is disposed between the first housing (102, 124, 126) and the second housing (104, 105), and the tip gripping portion 128 is housed by

springs

132a, 132b. Supported by the front end 126. For this reason, it can suppress that the vibration by piston 120 hit | damaging the striking rod 136 is transmitted to an operator.

Further, in the peening apparatus 150, the hitting pin 140 is detachably attached to the hitting rod 136 by the holder 138. For this reason, replacement | exchange of the striking pin 140 can be performed easily.

The technical elements described in the present specification or drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

Claims

A first housing held by an operator;
A tool holding member attached to the first housing and holding a tool at its tip;
A striking member that strikes the rear end of the tool holding member;
A drive mechanism for driving the striking member;
A peening apparatus, comprising: a pressing force display unit that displays a force with which an operator presses a tool against a peening site.
The pressing force display section
An elastic member having one end attached to the rear end of the first housing;
A second housing attached to the other end of the elastic member and displaced relative to the first housing in accordance with deformation of the elastic member;
A displacement amount display unit for displaying a displacement amount of the second housing relative to the first housing;
The peening apparatus according to claim 1, comprising:
The drive mechanism is for driving the striking member with air supplied from an air supply source,
The first housing is formed with an exhaust passage for exhausting at least part of the air supplied from the air supply source to the drive mechanism,
The tool held by the tool holding member is cooled by the air flowing through the exhaust passage,
The peening apparatus according to claim 1 or 2.
The first housing is
A main body to which a tool holding member is attached;
A gripping member attached to the surface of the main body so as to be slidable in the longitudinal direction of the tool holding member, and gripped by an operator.
The peening apparatus according to any one of claims 1 to 3.
A vibration absorbing member is disposed between the first housing and the second housing,
The peening apparatus according to claim 2, wherein when the second housing moves toward the first housing, the second housing abuts on the first housing via the vibration absorbing member.
The second housing has a recess in which the rear end of the first housing is fitted,
By fitting the rear end of the first housing in the recess of the second housing, the second housing is attached to the first housing so as to be slidable in the longitudinal direction of the tool holding member,
The peening apparatus according to claim 2 or 5, wherein the displacement amount display unit is a mark formed on an outer surface of the first housing.