CN219520249U - Punches for Post-Crimping - Google Patents

Abstract

The purpose of the present utility model is to provide a punch for post-hemming processing capable of coping with a workpiece shape having a large width such as a workpiece having a large bending portion and a workpiece having an end shape of a lasso hemming. The pressing surface is formed in an arc shape, a relief hole having a size corresponding to the protruding portion of the work is provided in a central portion of the pressing surface, the pressing surfaces are provided on both surfaces in a forward direction and a reverse direction with respect to the pressing shaft so that the pressing surface can correspond to the pressing in the pressing direction and the pressing in the pulling direction, and the pressing surface includes a normal arc-shaped pressing portion corresponding to the full bead and an arc-shaped pressing portion having a relief shape provided at an end portion corresponding to the lasso bead.

Description

Punches for Post-Crimping

technical field

The utility model relates to a punch for post-processing. The punch for post-processing is used when the end of the outer panel is crimped and joined to the inner panel of a vehicle cover product with a protrusion at the end. The shape of the outer panel is formed to follow the shape of the protrusion of the inner panel.

Background technique

Usually, the cover products of vehicles (in this application, refers to the movable cover components of vehicles such as doors, engine hoods, and trunk lids) The ends are crimped to be joined into one product. Hemming refers to the process of fixing the two panels to each other by bending the end of the outer panel and sandwiching the end of the inner panel. In most cases, as shown in FIG. 1 , the protrusion 13 is prefabricated on the inner panel, and the protrusion is riveted through the outer panel. In addition, by performing spot welding in addition to riveting, the joint strength can be made more reliable.

In order to make riveting and spot welding more reliable, protrusions 13 are formed in advance on the inner panel, and hemming is performed so that the end of the outer panel comes into contact with the protrusions. When spot welding is performed as described above, the welding current is concentrated on the protruding portion so that the adjacent inner and outer panels are reliably melted, and welding strength can be ensured.

As hemming processing, roll hemming processing in which a hemming roller driven by a robot is used is often used. When the roll hemming process is performed, the pressing force of the rollers is generally increased or decreased on the protruding part of the inner panel so as not to crush the protruding part, and at the same time, the hemming process is performed on the entire circumference of the panel material. At this time, the pressing by the rollers until it is pressed against the outer panel is stopped near the protruding portion, so the close contact between the end of the outer panel and the end of the inner panel becomes incomplete, and if spot welding is carried out at this point, When spot welding is performed, there are problems that spatter occurs or the appearance quality deteriorates.

Therefore, Patent Document 1 proposes a method of using a post-processing punch as shown in FIG. Post-processing is performed on the periphery of the protrusion after the hemming process. By attaching the post-processing punch adjacent to the hemming roller attached to the robot hand, post-hemming processing can be performed immediately after hemming processing, and processing time can be shortened, which is described as an advantage.

However, since the post-processing punch described above can only respond to pressurization in the pressing direction, when it is applied to a workpiece such as a trunk lid with a large curved portion, as shown in the P portion of 2a in FIG. 2 , The roller head that drives the punch sometimes interferes with the workpiece and cannot be post-processed. In addition, the above-mentioned punch cannot correspond to the so-called lasso crimping (Japanese: 团げR) intentionally made of a slightly larger bend R (Japanese: 曲げR) at the end of the outer panel as shown in 4a and 4b of Fig. 4 . : ロープドヘム).

prior art literature

patent documents

Patent Document 1: Japanese Patent No. 7019187

Utility model content

The utility model is made in consideration of the above-mentioned technical problems, and provides a punch for post-processing, which can correspond to workpieces with large widths such as workpieces with large bending parts and workpieces with lasso curled end shapes.

The utility model of claim 1 is a post-processing punch used for post-processing around the protrusion when bending the end of the outer panel to the end of the inner panel having the protrusion and performing hemming processing The processing is characterized in that the pressing surface is formed in an arc shape, and an escape hole of a size corresponding to the protrusion is provided in the central part of the pressing surface so that the pressing surface can correspond to the pressing direction. In the way of pressing in the pressing and pulling directions, pressing surfaces are provided on the two faces in the forward and reverse directions relative to the pressing axis.

According to the structure of claim 1, since the pressing surface is formed in an arc shape, the pressurizing force acts linearly during pressing, and therefore, if the pressing works so that the pressing surface rolls, various deformations of the workpiece can be controlled. The curved shape implements uniform pressure.

In addition, since the pressing surface is provided in two directions, forward and reverse relative to the pressing axis, so that the pressing surface can respond to pressing in the pressing direction and pressing in the pulling direction, it can also respond to pulling. Compression in the pulling direction. That is, even if there is a large curved portion in the workpiece, the robot arm interferes with the workpiece during the pressurization in the pressing direction and cannot be post-processed in the case of 2a in FIG. 2 . It is also possible to process by moving the head in the opposite direction and switching to pressurization in the pulling direction. Through the above-mentioned structure, post-processing of workpieces of various shapes can be realized.

The utility model of claim 2 is based on the structure of the post-processing punch described in claim 1, and is characterized in that it can handle both full curling (Japanese: ベタヘム) and lasso curling. In the way of post-processing, the pressurizing surface includes a normal arc-shaped pressurizing part corresponding to the full curl and an arc-shaped pressurizing part provided with an escape shape at the end corresponding to the lasso curl .

In this application, full hemming refers to the hemming process in which the bending R of the end of the outer panel after hemming processing is formed by the minimum R, while lasso hemming refers to a slightly larger shape that is intentionally enlarged. The beading of the bend R constituting the end of the outer panel is achieved by hemming in which the curved portion of the end of the outer panel is avoided.

According to the structure of claim 2, since the pressing surface includes both the simple arc-shaped pressing portion and the arc-shaped pressing portion provided with a relief shape at the end, regardless of the beading specification of the workpiece, The specification of full hemming and the specification of lasso hemming can be used for post-hemming processing of both because the pressing part is used separately.

The utility model of claim 3 is based on the structure of the punch for post-processing described in claim 2, and is characterized in that the punch for post-processing is attached adjacent to the crimping roller.

According to the structure of claim 3, since the post-processing punch is installed adjacent to the hemming roller, the hemming post-processing can be performed quickly after the roller hemming process is completed, thereby shortening the processing time.

The utility model of technical solution 4 is based on the structure of the post-processing punch described in technical solution 3, and is characterized in that the post-processing punch is mounted on a roller head, and the roller head is configured to pass through the pressing direction. Appropriate pressing force is applied by pressing in the pressing and pulling directions.

According to the structure of claim 4, since the post-processing punch is attached to the roller head, and the roller head is configured to apply a predetermined pressing force by pressing in the pressing direction and pressing in the pulling direction, it is possible to pass a predetermined pressing force. Pressing force performs post-curling processing of pressing in the pressing direction and pressing in the pulling direction, thereby ensuring high quality of the hemming process.

According to the post-processing punch of the present invention, since it has a structure that can correspond to both pressurization in the pressing direction and pressure in the pulling direction, and a structure that can correspond to full crimping and lasso crimping, therefore, Compatible with wide workpiece shapes such as workpieces with large curved parts and workpieces with lasso-rolled ends.

Description of drawings

FIG. 1 is a schematic diagram showing a door inner panel and a door outer panel assembly.

2a of FIG. 2 shows the state when the post-curling process is performed by pressurization in the pressing direction in the post-curling process of the present application, and 2b of FIG. The state of processing after curling.

FIG. 3 is a perspective view of a post-processing punch according to Embodiment 1 of the present application.

4a of Fig. 4 shows a schematic diagram of using the lasso curling to press the pressing surface 31 to carry out construction by pressing on the noose curling, and Fig. 4 4b shows using the noose curling to pull the pressing surface 33 on the noose curling. A schematic diagram of construction by pulling processing on the curling, 4c of Figure 4 shows a schematic diagram of using the full curl to press the pressing surface 32 to carry out construction by pressing on the full curl, 4d of Figure 4 shows a schematic diagram of using the full curl A schematic diagram of the construction of the traction and pressure surface 34 on the full curl through the traction process.

5a to 5c of Fig. 5 show schematic views of post-curling processing using the punch for post-processing of the present application.

FIG. 6 is a perspective view showing a state in which a post-processing punch according to Embodiment 2 of the present application is attached to a roll head.

Fig. 7 shows a sectional view at the pressurizing shaft of the roll head of the present application.

Fig. 8 is an exploded assembly view after unfolding the components of the roller head of the present application.

FIG. 9 shows a post-processing punch of Patent Document 1. FIG.

(Symbol Description)

1 post-processing punch;

2 punch pressure surface;

3 punch supporting part;

6 punch escape holes;

10 pressurized shafts;

11 inner panel;

12 outer panels;

13 inner protrusions;

15 anvils;

21 robot arms;

23 rolls for crimping;

31 Lasso crimping presses the pressure surface;

32 full crimping pressing surface;

33 Lasso crimping and pulling pressure surface;

34 full crimp pulling pressure surface;

35 pressure surface separation groove;

100 roller heads;

110 mounting flange;

120 force applying units;

127 inserts;

126a guide shaft;

126b linear bushing;

127a upper stop surface;

127b lower stop surface;

128a upper spring;

128b lower spring;

128c upper mounting bolts;

128d lower mounting bolts;

129a upper spring hole;

129b lower spring hole;

130 shells;

132 top plate;

134 bottom plate;

136 roller installation components

138 side panels;

150 motors;

158 output shaft;

156 gearboxes;

171 pull form force application equipment;

172 push form force application devices.

Detailed ways

Hereinafter, embodiments of the present invention will be described based on the drawings. In addition, the description of the following embodiment is only the illustration of essence, and is not intended to limit this invention, its applied thing, or its use.

In the hemming process of vehicle cover products, in order to make the joint more reliable, a plurality of protrusions are provided on the peripheral part of the inner panel, and after the peripheral part of the outer panel is bent and hemmed, the outer panel In such a way as to be in close contact with the above-mentioned protruding part of the inner panel, post-curling processing accompanied by riveting processing is performed, and in the case of further securing the joint, the two panels are spot-welded by touching the electrode against the above-mentioned protruding part . For example, in the front door shown in FIG. 1 , three-point protrusions 13 are provided on the front side and two-point protrusions 13 are provided on the rear side, and spot welding is performed after hemming at each location. Here, the caulking process is a process of deforming the protrusions of the outer panel and the inner panel so as to be in close contact with each other, thereby fixing both panels to each other.

The punch for post-processing of the present application is a technique preferably applied to roll hemming, and therefore, it will be described on the premise that it is applied to roll hemming. First, the process of roll hemming processing is demonstrated.

The outer panel 12 formed in the previous process and flanged at the end at an angle of about 90° is placed on the anvil 15, and the similarly formed inner panel 11 is superimposed in a posture corresponding to each other. Next, roll hemming is performed at an angle of about 45° around the entire circumference of the end portion of the flanged outer panel 12 . This is a process called pre-bending.

Next, the end of the outer panel 12 is bent so as to be in close contact with the inner panel 11 in roll hemming. This is a process called formal bending. At this time, if the above method is used to construct the entire circumference, the protrusion 13 will be crushed. Therefore, the pressing force is added or subtracted around the protrusion so that the protrusion will not be deformed, and the protrusions of the outer panel 12 and the inner panel 11 will not be deformed. Hemming is performed by contacting the top.

As a result, when the roll hemming of the entire circumference is completed, the entire circumference except a part is completely hemmed, and only the vicinity of the protrusion 13 is processed so that the outer panel 12 and the protrusion 13 are in contact. That is, the pressing by the roller stops near the protruding portion 13 until it comes into contact with the outer panel 12 , and the end of the outer panel 12 is incompletely adhered to the inner panel 11 .

As a next step, the inner panel is closely adhered to the outer panel by post-curling processing accompanied by caulking in the vicinity of the outer panel protrusion 13, thereby making the fixing of the two panels more reliable. In addition, when it is judged that fixation is insufficient only by caulking, spot welding is performed on the protruding portion 13 .

In addition, if spot welding is performed in a state where the inner panel is not in close contact with the protruding portion of the outer panel, sputtering may occur during spot welding, resulting in a problem that the appearance quality may deteriorate.

The pressing surface of the post-processing punch used in the present invention is formed in an arc shape. By being configured in an arc shape, the pressurizing force acts linearly during pressing, and therefore, there is a possibility that uniform pressurization can be applied to various curved surface shapes of the workpiece if the press is made to act in such a manner that the pressing surface rolls. characteristics of pressure.

(Embodiment 1)

The post-processing punch 1 of Embodiment 1 is shown in FIG. 3 . The punch 1 for post-processing is arranged adjacent to the roller 23 on the press shaft 10 that pressurizes the roller 23 . The post-processing punch 1 is composed of a punch supporting part 3 and a punch pressing surface 2. The punch supporting part 3 is fixed to the pressing shaft 10 by bolts or the like, and the punch pressing surface 2 is L-shaped from the punch supporting part 3. The die is extended to form a pressing surface perpendicular to the pressing shaft 10, and is configured to efficiently transmit the pressing force generated by the pressing shaft 10 to the workpiece through the punch pressing surface 2.

The punch pressurizing surface 2 is formed with pressurizing surfaces on both surfaces in the forward direction toward the end of the pressing shaft 10 and in the opposite direction toward the roll head. The forward pressing surface is called a pressing pressing surface, and the reverse pressing surface is called a pulling pressing surface.

In addition, both the pressing surface and the pulling pressure surface are formed with a pressure surface separation groove 35 in the central part, and are separated into an arc-shaped pressure surface for lasso curling and a pressure surface for full curling, respectively. Constructed face to face. The pressing surface for full curling is provided with a punch escape hole 6 for avoiding the protrusion 13 at the end of the arc-shaped punch pressing surface away from the punch supporting part 3 and at the center. In addition, the pressure surface for lasso crimping is provided with a pressure surface for full crimping, and an avoidance shape for avoiding the pressure of the lasso crimping part is provided near the punch support part 3. . Both the pressing and pressing surface and the pulling and pressing surface have the same structure.

The structure of each pressing surface is as shown in FIG. 3. In the pressing surface, a lasso crimping pressing surface 31 is formed on the left side sandwiching the separating groove 35 of the pressing surface, and a pressing surface 31 is formed on the left side sandwiching the pressing surface. The right side of the separation groove 35 is formed with a full curl pressing surface 32 . In addition, on the pulling and pressing surface, the lasso crimping pulling and pressing surface 33 is formed on the left side across the pressing surface separation groove 35 in the same manner, and the lasso curling pulling and pressing surface 33 is formed on the right side across the pressing surface separation groove 35 . There is full crimp pulling pressure surface 34. Of course, with regard to the above pressurized surface, different arrangements are also possible.

By including both the pressing and pressing surface and the pulling and pressing surface, it is possible to cope with both pressurization in the pressing direction and pressurization in the pulling direction. Since the robot is arranged outside the workpiece and the anvil, the normal hemming process and hemming post-processing process is to press and apply the robot arm approaching from the outer side of the workpiece. However, when the workpiece has a large curved portion, as shown in 2a of FIG. 2 , during pressing, the roller head interferes with the workpiece and surrounding equipment, making processing difficult. At this time, directly reverse the robot arm to the outside of the workpiece as shown in 2b of FIG. 2 and perform post-processing by pulling and pressing. According to the above method, even in the case of 2a in FIG. 2 where post-processing cannot be realized, by turning the roller head in the opposite direction as shown in 2b of FIG. Post-processing is performed when the processing equipment is changed. Accordingly, it is possible to cope with post-processing of workpieces of various shapes.

In addition, by separating the pressure surface by the pressure separation groove 35, and including both the pressure surface for lasso crimping and the pressure surface for full crimping, it is possible to selectively use pressure The post-curling processing is carried out in accordance with the hemming specifications of both sides. 4a to 4d of FIG. 4 show the use of the lasso crimping pressing surface 31, the lasso crimping pulling and pressing surface 33, the full crimping pressing surface 32, the full crimping pulling and pressing surface 34 is a schematic diagram of the method of post-curling processing and the processed workpiece.

In addition, in this embodiment, as shown in FIG. 3 , the post-processing punch 1 is attached to the press shaft 10 adjacent to the roller 23 . Specifically, the punch supporting portion 3 is fastened to the press shaft 10 with bolts. According to the above configuration, when the roll hemming process is completed, the same robot can be driven to switch immediately to the post-processing process of hemming using the post-processing punch, and the process can be shortened.

(Embodiment 2)

Next, regarding Embodiment 2, configurations not described in Embodiment 1 will be mainly described.

In Embodiment 2, as shown in FIG. 6 , the roller head 100 is attached to the robot arm 21, and the post-processing punch 1 is arranged adjacent to the roller 23 arranged at the front end of the pressing shaft 10 of the roller head 100. . The pressing shaft 10 of the curling roller is configured to be rotatable by a motor 150 . The roller head 100 is installed on the robot arm 21 via the mounting flange 110, and the roller head 100 is driven by the robot arm. By using the rotary head, hemming can be performed without greatly changing the posture of the robot arm, especially at corners, etc., so that the processing speed can be improved. In this embodiment, a rotary roll head is used, but a normal roll head in which the pressure roller of the roll does not rotate may be used.

Furthermore, the rotary roll head 100 is characterized in that it is configured to be able to apply a predetermined pressing force by pressing in the pressing direction and pressing in the pulling direction. Hereinafter, a specific structure thereof will be described using FIGS. 6 to 8 .

As shown in FIG. 6 , a force applying unit 120 is disposed between the mounting flange 110 to which the robot arm is fixedly connected and the housing 130 to which the crimping roller pressing shaft is fixedly connected. The force applying unit 120 is configured to transmit the processing pressure of both.

A specific structure of the urging unit 120 will be described using FIG. 7 illustrating a cross section of the urging unit 120 and an exploded assembly FIG. 8 in which each component is developed.

The force applying unit 120 is vertically disposed between the top board 132 and the bottom board 134 . The force applying unit 120 comprises an insert 127 having an upper stop surface 127a and a lower stop surface 127b which make the direction of the housing 130 parallel to the longitudinal axis H-H. Movement stops.

In addition, the urging unit includes a push-type urging device 172 configured to urge the roller 23 in a direction away from the casing along the longitudinal axis at a lower portion, and includes a pull-type urging device at an upper portion. The force applying device 171 is configured to apply force to the roll package in a direction along the longitudinal axis toward the housing.

The push type urging device 172 is composed of the lower spring hole 129b at the lower part of the urging unit 120, the lower spring 128b, and the lower mounting bolt 128d. In this embodiment, two lower spring holes 129b are formed from the lower stop surface 127b at the bottom of the insert 127 to the vicinity of the middle along the longitudinal direction of the insert 127, and the lower springs 128b are inserted into the holes and passed through the lower mounting bolts. 128d fixed.

On the other hand, the pull type urging device 171 is constituted by the upper part of the urging unit 120, the upper spring hole 129a, the upper spring 128a, and the upper mounting bolt 128c. In this embodiment, two upper spring holes 129a are formed from the upper stop surface 127a on the upper part of the insert 127 to the vicinity of the middle along the longitudinal direction of the insert 127, and an upper spring 128a is inserted into each hole, and is installed through the upper part. Bolt 128c is fixed.

The insert 127 is slidably disposed between the top plate 132 and the bottom plate 134 . That is, in this embodiment, two insertion holes are formed in the longitudinal direction in the insert 127, the guide shaft 126a is inserted through each insertion hole via the linear bush 126b, and the upper end of the guide shaft 126a , and the lower ends are respectively supported by the top plate 132 and the bottom plate 134 .

In addition, the respective lengths of the push-type urging device 172 and the pull-type urging device 171 are adjusted so that the insert 127 is arranged at the initial position with the top plate 132 and the bottom plate 134 at the same vertical interval. In this embodiment, the vertical interval is set to about 10 mm.

When the processing pressure generated by the push-type post-curling process is applied from the post-curling punch 1 to the housing due to the operation of the robot arm 21, the insert 127 relatively moves toward the workpiece with respect to the housing 130, The lower stop surface 127b of the insert 127 abuts against the upper surface of the bottom plate 134 to stop the movement.

On the contrary, when the processing pressure generated by the post-curling processing in the form of pulling acts from the post-curling punch 1 to the housing, the insert 127 relatively moves away from the workpiece relative to the housing 130, and the upper part stops The surface 127a abuts against the bottom surface 132a of the top plate 132 to stop the movement.

When the insert 127 comes into contact with the top plate 132 or the bottom plate 134 so that the working pressure of the robot arm 21 is directly applied, accurate working pressure will not be applied. Therefore, in the actual hemming process, the upper and lower gaps are maintained at 3 to 5 mm while the process pressure is applied, and the stress of the spring is managed so that the process pressure is applied.

(Punch work for post-processing)

A specific working method of the post-processing punch will be described using FIG. 5 . According to the specifications of full crimping and lasso crimping and the pressurization method of pressing and pulling, selectively use the appropriate punch pressing surface. Here, a specific operation method for pressing the pressing surface 31 with the lasso crimp will be described.

First, as shown in 5a of FIG. 1 abuts against the outer panel. At this time, since the avoidance shape for avoiding the pressurization of the noose curling portion is provided near the punch support portion 3 of the noose curling pressing surface 31, the noose curling shape is not pressurized. .

Then, the arc-shaped lasso crimping pressing surface 31 is rolled along the end of the outer panel, and the punch escape hole 6 formed on the pressing surface coincides with the protrusion 13, and the robot arm 21 Operate the post-processing punch 1. Through the above-mentioned action, the peripheral portion of the protrusion 13 where the pressing force of the hemming process is incomplete is pressed by the post-processing punch 1, and the outer panel becomes tight to the inner panel as shown in 5b and 5c of Fig. 5 . In the pasted state, the hemming process of the protrusion 13 and the peripheral portion is completed. The two panels are reliably joined by the post-curling process accompanying the above-mentioned riveting process.

The operation is also the same when using the other full crimp pressing and pressing surface 32 , the noose crimping pulling and pressing surface 33 , and the full pulling and pressing surface 34 .

The above-mentioned post-processing is performed on all the protrusions of the inner panel, five protrusions in this embodiment, and the post-curling process is completed. By teaching the robot a series of motions, the post-processing of each protrusion can be automatically performed.

If the electrode is brought into contact with the outer panel side of the protrusion 13 and spot welded in the above state, the welding current will flow concentratedly between the outer panel and the inner panel at the protrusion, and sufficient heat will be generated to obtain reliable melting. , therefore, high-quality welding can be performed.

Claims (4)

1. A punch for post-curling processing, which is used for post-processing the periphery of the protruding part when bending the end of the outer panel to the end of the inner panel having the protruding part and performing hemming processing, It is characterized in that, The pressing surface is formed in an arc shape, and an escape hole of a size corresponding to the protrusion is provided in the central part of the pressing surface, In addition, the pressurizing surface is provided on two surfaces in a forward direction and a reverse direction with respect to the pressurizing axis so that the pressurizing surface can respond to pressurization in the pressing direction and pressurization in the pulling direction. 2. The punch for post-curling treatment according to claim 1, wherein: In such a way that the post-curling treatment of both full curling and lasso curling can be supported, the pressure surface includes an arc-shaped pressing portion corresponding to full curling and an arc-shaped pressing portion corresponding to lasso curling. The end portion is provided with an arc-shaped pressurizing portion having an escape shape. 3. The punch for post-curling treatment according to claim 2, wherein: The post-processing punch is mounted adjacent to the crimping roll. 4. The punch for post-curling treatment according to claim 3, wherein: The post-processing punch is attached to a roll head configured to apply a predetermined pressure by pressing in a pressing direction and pressing in a pulling direction.