SOFT TUBE GRIPPER FOR PUNCHING
20210086386 ยท 2021-03-25
Assignee
Inventors
Cpc classification
B25B1/2421
PERFORMING OPERATIONS; TRANSPORTING
B26D2007/013
PERFORMING OPERATIONS; TRANSPORTING
B26F1/3846
PERFORMING OPERATIONS; TRANSPORTING
B26D7/01
PERFORMING OPERATIONS; TRANSPORTING
B25B1/20
PERFORMING OPERATIONS; TRANSPORTING
International classification
Abstract
A gripper for gripping a tube for punching may include a first arm having a lower portion and an upper portion disposed outwardly from an upper surface of the lower portion. The upper portion extends to opposite first and second side surfaces and opposite third and fourth side surfaces, where opposite edges of the first and second side surfaces each meet an edge of one of the opposite third and fourth side surfaces. The second side surface includes a groove extending from the second side surface towards the first side surface and along a length of the second side surface. The groove is configured to receive at least a portion of a tube when a second arm like the first arm is disposed adjacent to and aligned with the first arm.
Claims
1. A gripper for gripping a tube for punching, comprising: a first arm including a lower portion and an upper portion disposed outwardly from an upper surface of the lower portion, wherein the upper portion extends to opposite first and second side surfaces and opposite third and fourth side surfaces, wherein opposite edges of the first and second side surfaces each meet an edge of one of the opposite third and fourth side surfaces, wherein the second side surface includes a groove extending from the second side surface towards the first side surface and along a length of the second side surface, and wherein the groove is configured to receive at least a portion of a tube when a second arm like the first arm is disposed adjacent to and aligned with the first arm.
2. The gripper of claim 1, wherein when the second arm is disposed adjacent to and aligned with the first arm, the second arm is positioned such that a second side surface of the second arm is adjacent to the second side surface of the first arm, with the third side surface of the first arm extending along a same plane with a fourth side surface of the second arm, and the fourth side surface of the first arm extending along a same plane with a third side surface of the second arm.
3. The gripper of claim 1, wherein the groove of the first arm is configured such that, when the second arm is disposed aligned with the first arm and positioned such that second side surfaces of the first and second arms are in contact with each other, a tunnel is formed collectively by grooves of the first and second arms.
4. The gripper of claim 3, wherein the tunnel is configured to receive at least a portion of a tube such that the portion of the tube received in the tunnel is prevented from collapsing when force is applied to a wall of the portion of the tube received in the tunnel.
5. The gripper of claim 4, wherein the tunnel has an inner diameter that is between about 1% and about 5% smaller than a default outer diameter of the portion of the tube received in the tunnel.
6. The gripper of claim 1, wherein the groove is configured such that, when the second arm is disposed aligned with the first arm and positioned such that second side surfaces of the first and second arms are spaced apart a predetermined distance, a space is formed collectively by grooves of the first and second arms, and wherein the space is configured to slidably and rotatably receive at least a portion of a tube.
7. The gripper of claim 1, wherein the upper portion further includes a slot, wherein the slot extends from the second side surface towards the first side surface, and wherein the slot extends from a top surface of the upper portion towards the upper surface of the lower portion and to a plane that at least meets the groove at an upper edge of the groove.
8. The gripper of claim 7, wherein the slot is disposed along a center plane that extends between the first and second side surfaces and in parallel to and centered by the third and fourth side surfaces.
9. The gripper of claim 7, wherein the upper edge of the groove further includes a cutout extending within the slot from the second side surface towards the first side surface.
10. The gripper of claim 9, wherein when the second arm is disposed adjacent to and aligned with the first arm, slots and cutouts of the first and second arms collectively form a passage configured to allow at least a portion of an elongate member to extend from above top surfaces of the first and second arms, through the passage, and into grooves of the first and second arms.
11. The gripper of claim 1, wherein the lower portion extends to opposite fifth and sixth side surfaces and opposite seventh and eighth side surfaces, wherein opposite edges of the fifth and sixth side surfaces each meet an edge of one of the opposite seventh and eighth side surfaces, wherein the upper portion extends along a center plane that extends between the fifth and sixth side surfaces and in parallel to and centered by the seventh and eighth side surfaces, and wherein the third and fourth side surfaces of the upper portion are disposed equidistant from the center plane.
12. A gripper for gripping a soft tube for punching, comprising: a first arm and a second arm, wherein the first arm and the second arm are moveable relative to each other, wherein the gripper has an open configuration and a closed configuration, and wherein the first arm and the second arm are configured such that when the gripper is in the closed configuration, a tunnel is formed collectively by the first and second arms and configured to receive at least a portion of a soft tube such that at least the portion of the soft tube received in the tunnel is prevented from collapsing when force is applied to a wall of the portion of the soft tube received in the tunnel.
13. The gripper of claim 12, wherein the tunnel has an inner diameter that is between about 1% and about 5% smaller than a default outer diameter of the portion of the tube received in the tunnel.
14. The gripper of claim 12, wherein the first and second arms are further configured such that when the gripper is in the closed configuration, a passage is formed collectively by the first and second arms and configured to allow at least a portion of an elongate member to extend from above top surfaces of the first and second arms, through the passage, and into the tunnel.
15. A gripper for gripping a tube for punching, comprising: a first arm including a lower portion and an upper portion disposed outwardly from an upper surface of the lower portion, wherein the upper portion extends to opposite first and second side surfaces and opposite third and fourth side surfaces, wherein opposite edges of the first and second side surfaces each meet an edge of one of the opposite third and fourth side surfaces, and wherein the second side surface includes a groove extending from the second side surface towards the first side surface and along a length of the second side surface.
16. The gripper of claim 15, wherein the groove is configured to receive at least a portion of a tube when a second arm like the first arm is disposed adjacent to and aligned with the first arm.
17. The gripper of claim 16, wherein the groove is configured such that, when the second arm is disposed aligned with the first arm and positioned such that second side surfaces of the first and second arms are in contact with each other, a tunnel is formed collectively by grooves of the first and second arms, and wherein the tunnel is configured to receive at least a portion of a tube such that at least the portion of the tube received in the tunnel is prevented from collapsing when force is applied to a wall of the portion of the tube received in the tunnel.
18. The gripper of claim 17, wherein the tunnel has an inner diameter that is between about 1% and about 5% smaller than a default outer diameter of the portion of the tube received in the tunnel.
19. The gripper of claim 15, wherein the upper portion includes a slot that extends from the second side surface towards the first side surface, and wherein the slot extends from a top surface of the upper portion towards the upper surface of the lower portion and to a plane that at least meets the groove at an upper edge of the groove.
20. The gripper of claim 19, wherein when a second arm like the first arm is disposed aligned with the first arm and positioned such that second side surfaces of the first and second arms are in contact with each other, slots of the first and second arms collectively form a passage configured to allow at least a portion of an elongate member to extend from above top surfaces of the first and second arms, through the passage, and into grooves of the first and second arms.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The present disclosure can be better understood with reference to the following drawings and description. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the present disclosure. Moreover, in the figures, like-referenced numerals designate corresponding parts throughout the different views.
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DETAILED DESCRIPTION
[0018] Various aspects are described below with reference to the drawings in which like elements generally are identified by like numerals. The relationship and functioning of the various elements of the aspects may better be understood by reference to the following detailed description. However, aspects are not limited to those illustrated in the drawings or explicitly described below. It also should be understood that the drawings are not necessarily to scale, and in certain instances details may have been omitted that are not necessary for an understanding of aspects disclosed herein, such as conventional material, construction, and assembly.
[0019] Turning now to
[0020] The first arm 20 of the gripper 10 is best shown in
[0021] The lower portion 60 may extend to opposite fifth and sixth side surfaces 110 and 112 and opposite seventh and eighth side surfaces 114 and 116. The fifth and sixth side surfaces extend to edges 110a, 110b, 112a, and 112b, and the seventh and eighth side surfaces extend to edges 114a, 114b, 116a, and 116b that meet with respective edges of the fifth and sixth side surfaces 110 and 112 at respective intersections. In some embodiments, as shown in
[0022] In some embodiments, as shown in
[0023] This configuration allows a gripper 10 to be assembled using a first arm 20 and a second arm 40 (like the first arm 20) with a tunnel 126 or space 130 formed collectively by grooves 140 of the first and second arms 20 and 40, and a passage 136 formed collectively by slots 120 (or together with cutouts 144) of the first and second arms 20 and 40, as discussed in greater detail below. As shown in
[0024] Then the first arm 20 and/or the second arm 40 may be moved towards each other until they are spaced apart a predetermined distance 132 (e.g., as shown in
[0025] In some embodiments, as shown in FIGS.1-4, the second side surface 104 and the sixth side surface 112 extend through a same plane, the first side surface 102 and the fifth side surface 110 extend through a same plane, and the third and fourth side surfaces 106 and 108 are disposed closer to the center plane 118 than the seventh and eighth side surfaces 114 and 116. It will be appreciated that these features of the first arm 20 may be varied as desired and/or needed without departing from the scope of the present invention as long as the gripper 10 may be assembled using the first arm 20 and a second arm 40 (like the first arm 20), as discussed above. As one non-limiting example, the second side surface 104 may extend outwardly from the sixth side surface 112 such that when the gripper 10 is assembled as discussed above, the second side surfaces 104 of the first and second arms 20 and 40 may closely contact each other without the sixth side surfaces 112 of the first and second arms 20 and 40 contacting each other. As another non-limiting example, the third and fourth side surfaces 106 and 108 may be disposed further away from the center plane 118 than the seventh and eighth side surfaces 114 and 116. As another non-limiting example, the third and fourth side surfaces 106 and 108 and the seventh and eighth side surfaces 114 and 116 may be disposed equidistant from the center plane 118.
[0026] As shown in
[0027] The groove 140 is configured such that, when the gripper 10 is in the closed configuration, the portion of the tube 134 received in the tunnel 126 is prevented from collapsing when force is applied to a wall of the portion of the tube received in the tunnel 126 (e.g., when the wall is being punched). In other words, the groove 140 is configured such that the portion of the tube 134 received in the tunnel 126 is engaged or closely surrounded by the internal surface of the tunnel 126 such that the portion of the tube is forced (e.g., supported externally) to its default outer diameter (an outer diameter when no force is applied to the tube), thereby not allowing the portion of the tube 134 to deflect away out of shape from the force being applied to the wall of the portion of the tube 134 (e.g., a drill while being punched) as would happen if there is no internal support placed in the tube 134. Accordingly, this configuration is advantageous for allowing the tube 134 to be punched without an inner support positioned within the tube 134 before punching, and thereby enhancing the efficiency, saving labor and materials used for supporting the tube, and also allowing the punching operation to be automated (discussed below).
[0028] To provide the above mentioned external support to a tube secured by the gripper 10, the groove 140 is configured to have a marginally smaller closed diameter (e.g., the inner diameter of the tunnel 126) than the default outer diameter of the tube. As one non-limiting example, in the embodiments where the tunnel 126 has a generally circular cross-section (e.g., as shown in
[0029] As shown in
[0030] The slot 120 (and thus the cutout 144) is disposed along the center plane 118, such that when the gripper 10 is assembled as discussed above, a passage 136 (e.g., as shown in
[0031] It will be appreciated that, when the gripper 10 is used for punching apertures on a wall of a tube 134, the configuration of the slot 120 (or together with the cutout 144) may be varied depending on the configuration (e.g., shape and size) of the apertures to be created on the wall of the tube 134 extending through the tunnel 126 and thus also depending on the configuration of the punching portion (e.g., the elongate member 138 as shown in
[0032] The slot 120 may also be configured to allow for a relative movement between the elongate member 138 and the first and second arms 20 and 40 of the gripper 10 when a portion of the elongate member 138 has extended into the passage 136. As one non-limiting example, as shown in
[0033] In some embodiments, the valley 146 is provided to allow for the elongate member 138 to deposit a swarf (portion of the tube removed from the tube during the punching operation) that is removed from the tube within the valley after the cutting operation, such that the swarf does not remain upon the tube or otherwise interfere with the punching process of the tube being punched or future tubes to be punched. In some embodiments, compressed air may be flow through the valley 146 to urge the swarfs out of the valley 146 and into a container to be collected.
[0034] In some embodiments, as shown in
[0035] As shown in
[0036] Referring to
[0037] Before punching, the gripper is adjusted to the closed configuration, as shown in
[0038] While various embodiments of the present disclosure have been described, the present disclosure is not to be restricted except in light of the attached claims and their equivalents. One skilled in the relevant art will recognize that numerous variations and modifications may be made to the embodiments described above without departing from the scope of the present invention, as defined by the appended claims. Moreover, the advantages described herein are not necessarily the only advantages of the present disclosure and it is not necessarily expected that every embodiment of the present disclosure will achieve all of the advantages described.