I claim:
1. A working table comprising:
a housing including a chamber formed therein, and including at least one channel and a groove formed therein and communicating with said chamber thereof,
a board slidably received in said chamber of said housing,
a casing secured to said board and moved in concert with said board,
a post slidably engaged through said groove of said housing, and slidably engaged through said casing,
a spindle rotatably secured in said housing, and slidably engaged through said casing, to guide said casing to move relative to said housing,
moving means for moving said post up and down relative to said board and said housing,
at least one rod slidably engaged through said channel of said housing, and engaged through said board, and
a table disposed on top of said post and said rod, and movable up and down by said post and said moving means.
2. The working table as claimed in claim 1, wherein said moving means includes a rack formed in said post, a gear rotatably secured in said casing and engaged with said rack of said post, and a worm slidably engaged on said spindle and engaged with said gear.
3. The working table as claimed in claim 1, wherein said spindle includes at least one longitudinal guiding member engaged with said worm, to guide said worm to move along said spindle, and to prevent said worm from rotating relative to said spindle.
4. The working table as claimed in claim 1, wherein said board includes at least one duct engaged through said board, and slidably engaged in said channel of said housing, said rod is slidably engaged through said duct.
5. The working table as claimed in claim 1 further comprising means for biasing said rod relative to said housing.
6. The working table as claimed in claim 1, wherein said housing includes at least one slot formed therein, and at least one fastener secured to said board and slidably engaged in said slot of said housing.
7. The working table as claimed in claim 1 further comprising a handle secured to said spindle, to rotate said spindle relative to said housing.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. Welding device comprising:
pliers arms holding electrodes, wherein the pliers arms apply a clamping force to the electrodes and a welding current passes through the electrodes,
a force sensor mounted on at least one of the pliers arms, said force sensor being equipped with two support blocks on a side facing a surface of the pliers arm on which the force sensor is mounted,
an interposed part disposed between the pliers arm and the force sensor,
a mounting support having a general shape of an L, said support having a first branch and a second branch,
wherein the first branch of the L-shaped support bears a collar clamping the pliers arm at a first location along a longitudinal axis of the pliers arm, said collar having an upper portion and a lower portion, wherein the upper portion is supported on the pliers arm on one side of the arm with respect to its longitudinal axis, and the lower portion is supported on the pliers arm on another side with respect to its longitudinal axis, and
wherein the second branch of the L-shaped support extends from the first branch in a direction of the longitudinal axis of the pliers arm and holds the sensor on the pliers arm in a second location different from the first location along the longitudinal axis of the pliers arm, said second branch having a threaded bore in which a threaded clamping rod is engaged so that the clamping rod presses the sensor against the pliers arm via the interposed part,
wherein the collar clamping the pliers arm constitutes the only securement of the mounting support along the longitudinal axis of the pliers arm.
2. Welding device according to claim 1, wherein the interposed part is made in a material whose hardness is intermediate between the hardness of the pliers arm and the hardness of the sensor.
3. Welding device according to claim 1, wherein the interposed part is made in a material whose hardness is in the order of 350 to 450 HV0.3.
4. Welding device according to claim 1, wherein the interposed part is an essentially flat element, having two opposed mounting faces, of which the first one is intended to be contacted with the sensor and the second one is intended to be contacted with the pliers arm, each of these two mounting faces having a complementary shape with respect to the shape of the pliers arm and of the sensor, respectively, to obtain a shape adaptation between the arm and the sensor.
5. Welding device according to claim 1, wherein the interposed part is made in a material whose hardness is in the order of about 400 HV0.3.
6. Welding device according to claim 1, wherein the clamping rod is equipped with a ring through which the clamping rod is supported on the sensor, so as to enable an orientation of the sensor during mounting.
7. Welding device according to claim 1, wherein the clamping rod is secured in position with a lock nut.
8. Welding device according to claim 1, wherein the interposed part is designed specifically for each diameter of the pliers arm.
9. Welding device according to claim 1, wherein the interposed part is adaptable to several diameters of the pliers arm.
10. Welding device according to claim 1, wherein the second branch of the L-shaped support has a groove extending in a direction of the longitudinal axis of the pliers arm, a portion of the sensor being located in the groove.
11. Method of mounting a force sensor on a pliers arm, which comprises the following steps:
preparing the surface of the pliers arm in the location where the sensor will be disposed,
disposing an interposed part on the pliers arm and the sensor on the interposed part,
mounting the interposed part and the sensor on the pliers arm with a mounting support,
wherein the mounting support has a general shape of an L, said support having a first branch and a second branch,
wherein the first branch of the L-shaped support bears a collar clamping the pliers arm at a first location along a longitudinal axis of the pliers arm, said collar having an upper portion and a lower portion, wherein the upper portion is supported on the pliers arm on one side of the arm with respect to its longitudinal axis, and the lower portion is supported on the pliers arm on the other side with respect to its longitudinal axis, and
wherein the second branch of the L-shaped support extends from the first branch in a direction of the longitudinal axis of the pliers arm and holds the sensor on the pliers arm in a second location different from the first location along the longitudinal axis of the pliers arm, said second branch having a threaded bore in which a threaded clamping rod is engaged so that the clamping rod presses the sensor against the pliers arm via the interposed part,
wherein the collar clamping the pliers arm constitutes the only securement of the mounting support along the longitudinal axis of the pliers arm.
12. Method according to claim 11, wherein the interposed part is made in a material whose hardness is intermediate between the hardness of the pliers arm and the hardness of the sensor.
13. Method according to claim 11, wherein the interposed part is made in a material whose hardness is in the order of 350 to 450 HV0.3.
14. Method according to claim 11, wherein the interposed part is an essentially flat element, having two opposed mounting faces, of which the first one is intended to be contacted with the sensor and the second one is intended to be contacted with the pliers arm, each of these two mounting faces having a complementary shape with respect to the shape of the pliers arm and of the sensor, respectively, to obtain a shape adaptation between the arm and the sensor.
15. Method according to claim 11, wherein the interposed part is made in a material whose hardness is in the order of about 400 HV0.3.
16. Method according to claim 11, wherein the rod is equipped with a pin or ring through which the rod is supported on the sensor, so as to enable an orientation of the sensor during mounting.
17. Method according to claim 11, wherein the clamping rod is secured in position with a lock nut.
18. Method according to claim 11, wherein the interposed part is designed specifically for each diameter of the pliers arm.
19. Method according to claim 11, wherein the interposed part is adaptable to several diameters of the pliers arm.
20. Method according to claim 11, wherein the second branch of the L-shaped support has a groove extending in a direction of the longitudinal axis of the pliers arm, a portion of the sensor being located in the groove.