Welding equipment and welding method

Abstract

To provide a welding apparatus and a welding method, capable of easily coping with multi-product production.SOLUTION: A welding apparatus 100 comprises a conveyance unit 20, a cutting unit 30, and a welding unit 40. The conveyance unit 20 executes sending and drawing back of a linear or tape-like contact material R in a direction where the contact material R extends. The cutting unit 30 cuts the contact material R conveyed by the conveyance unit 20. The welding unit 40 welds the contact material R cut by the cutting unit 30 to a contact support body. The conveyance unit 20 disposes the cut contact material R at a welding scheduled position at the contact support body before drawing back the contact material R to be cut at a cutting position at which the contact material R is to be cut into a reference length by the cutting unit 30.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a welding apparatus and a welding method. [Background technology]

[0002] The auxiliary movable contactor used in an electromagnetic switch is manufactured by cutting a rod-shaped contact material having a trapezoidal cross section and welding the cut contact material to a base metal using a contact welding device.

[0003] Cited Document 1 discloses a contact welding method for cutting a tape-shaped contact material and resistance-welding it to a contact support. In this contact welding method, the contact material is moved forward along a guide path of a guide member, the contact material is inserted between a cutting blade consisting of an upper blade and a lower blade having a thickness and sliding in contact with the cutting opening surface of the guide member, the length of the transfer path provided on the upper blade, and the cutting blade is driven to cut the contact material. After that, the cutting blade is returned to the contact material insertion position before cutting, leaving a cut piece of the contact material inside the cutting blade. Next, the cut piece is pushed out from the cutting blade by a feeding means and transferred to the contact support, and the cut piece is resistance-welded to the contact support. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 58-59517 Summary of the Invention [Problem to be solved by the invention]

[0005] In the contact welding method described in the cited document 1, the cutting length of the contact depends on the length of the transport path provided in the upper blade. Therefore, in order to weld a contact material whose length dimension has been changed due to a change in product design, it is necessary to replace the upper blade with one having a transport path long enough to leave the contact material of the changed length. Since replacing the upper blade is time-consuming and laborious, the contact welding method described in the cited document 1 has the problem that it cannot easily accommodate the production of a wide variety of products with different cutting lengths of the contacts.

[0006] The present disclosure has been devised to solve the above-mentioned problems, and has an object to provide a welding device and a welding method that can easily accommodate the production of a wide variety of products. [Means for solving the problem]

[0007] In order to achieve the above object, a welding device according to the present disclosure includes a conveying unit which feeds out and pulls back a linear or tape-shaped contact material in an extending direction of the contact material, a cutting unit which cuts the contact material conveyed to the conveying unit, and a welding unit which welds the contact material cut by the cutting unit to a contact support. a first instrument for measuring the distance from the cut location to an edge of the contact material; The conveying section places the cut contact material at a position on the contact support body where welding is to be performed, and then returns the contact material to be cut to a cutting position where the contact material is cut to a reference length by the cutting section. and adjusting the amount of the contact material fed or pulled back based on the distance from the cut position to the end of the contact material measured by the first measuring device. . Effect of the Invention

[0008] According to the present disclosure, a welding apparatus and a welding method can be provided that can easily accommodate the production of a wide variety of products by having the conveying section pull back the contact material to be cut to the cutting position where the contact material is cut to a standard length by the cutting section. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 illustrates a welding device according to an embodiment of the present disclosure. [Diagram 2] FIG. 1 is a front view showing a welding device according to an embodiment of the present disclosure; [Diagram 3] FIG. 1 is a top view showing a welding device according to an embodiment of the present disclosure. [Figure 4] FIG. 2 is a block diagram showing a control device provided in the welding device according to the embodiment of the present disclosure. [Diagram 5] FIG. 1 is a diagram showing a control device provided in a welding device according to an embodiment of the present disclosure. [Figure 6] 1 is a flowchart showing a welding process according to an embodiment of the present disclosure. [Figure 7] FIG. 1 is a diagram illustrating a welding method according to an embodiment of the present disclosure. [Figure 8] FIG. 1 is a diagram illustrating a welding method according to an embodiment of the present disclosure. [Figure 9] FIG. 1 is a diagram illustrating a welding method according to an embodiment of the present disclosure. [Figure 10] FIG. 1 is a diagram illustrating a welding method according to an embodiment of the present disclosure. [Figure 11] FIG. 1 is a front view showing a welding device according to a modified example of the present disclosure. [Figure 12] FIG. 1 is a front view showing a welding device according to a modified example of the present disclosure. [Figure 13] FIG. 1 is a front view showing a welding device according to a modified example of the present disclosure. [Figure 14] FIG. 1 is a top view showing a welding device according to a modified example of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a welding apparatus and a welding method according to an embodiment of the present disclosure will be described in detail with reference to the drawings.

[0011] As shown in FIG. 1, the welding apparatus 100 according to the embodiment includes a supply section 10 for supplying linear or tape-shaped contact material R, a transport section 20 for transporting the contact material R, a cutting section 30 for cutting the contact material R, a welding section 40 for welding the contact material R, and a control device 200 for controlling the transport section 20, the cutting section 30, and the welding section 40, and is used to manufacture auxiliary movable contacts used in electromagnetic switches.

[0012] For ease of understanding, mutually orthogonal xyz coordinates are set and referred to as appropriate. The direction in which the contact material R is transported is set as the x direction, the direction perpendicular to the base plate 11 is set as the z direction, and the direction perpendicular to the x and y directions is set as the y direction.

[0013] The supply unit 10 has a support unit 12 suspended from a base plate 11, a reel frame 13 rotatably supported by the support unit 12 and having a disk-like shape, on which the contact material R is wound, and a first guide member 14 for guiding the contact material R. The first guide member 14 also has a first guide path 14a shown in Fig. 2 for transporting the contact material R in the x direction.

[0014] As shown in Fig. 2 and Fig. 3, the conveying section 20 is provided between the supplying section 10 and the cutting section 30, and sends out the contact material R in the x direction and pulls back the contact material R in the -x direction. The conveying section 20 includes a first driving roller 21 having a disk-like shape, a first driving roller servomotor 22 that rotates the first driving roller 21, a freely rotating first passive roller 23, a second guide member 24 that guides the contact material R, a second driving roller 25 having a disk-like shape, a second driving roller servomotor 26 that rotates the second driving roller 25, and a freely rotating second passive roller 27. The first driving roller servomotor 22 and the second driving roller servomotor 26 are examples of a conveying drive device.

[0015] The first driving roller 21 is provided in the x direction of the first guide member 14, and the outer circumferential curved surface of the first driving roller 21 is arranged so as to circumscribe the lower surface of the contact material R that has passed through the first guide path 14a. The first driving roller 21 rotates about a rotating shaft 21a that is fixed through the center of the first driving roller 21. A rotating shaft of a servo motor 22 for the first driving roller is coaxially connected to this rotating shaft 21a, and the first driving roller 21 is rotated by driving the servo motor 22 for the first driving roller. The first passive roller 23 has a disk shape, is provided at a position symmetrical to the first driving roller 21 with respect to the central axis Ra of the contact material R, and freely rotates about a rotating shaft 23a that is fixed through the center of the circle. Furthermore, one end of a compression spring 23b, the other end of which is fixed, is connected to the rotating shaft 23a, and this compression spring 23b is installed with a force biased in a direction extending toward the contact material R, so that the spring force constantly presses the first passive roller 23 with a constant force from the upper surface of the contact material R while making contact with it. At the installation position of the first driving roller 21 and the first passive roller 23, the contact material R is sandwiched and held from above and below, and is particularly sandwiched by the spring force of the compression spring 23b connected to the first passive roller 23.

[0016] The second guide member 24 is provided between the first driving roller 21 and the first driven roller 23, and the second driving roller 25 and the second driven roller 27, and includes a second guide path 24a provided inside the second guide member 24. The second guide path 24a is disposed on the same central axis as the first guide path 14a of the first guide member 14.

[0017] The second driving roller 25 is provided in the x direction of the second guide member 24, and the outer circumferential curved surface of the second driving roller 25 is arranged so as to circumscribe the lower surface of the contact material R that has passed through the second guide path 24a. The second driving roller 25 rotates about a rotating shaft 25a that is fixed through the center of the second driving roller 25. The rotating shaft of the servo motor 26 for the second driving roller is coaxially connected to this rotating shaft 25a, and the second driving roller 25 is rotated by driving the servo motor 26 for the second driving roller. The second passive roller 27 has a disk shape, is provided at a position symmetrical to the center axis Ra of the contact material R with respect to the second driving roller 25, and freely rotates about a rotating shaft 27a that is fixed through the center of the circle. Furthermore, one end of a compression spring 27b, the other end of which is fixed, is connected to the rotating shaft 27a, and this compression spring 27b is installed with a force biased in a direction extending toward the contact material R, so that the spring force constantly presses the second passive roller 27 with a constant force from the upper surface of the contact material R while making contact with it. At the installation position of the second driving roller 25 and the second passive roller 27, the contact material R is sandwiched and held from above and below, and is particularly sandwiched by the spring force of the compression spring 27b connected to the second passive roller 27.

[0018] The cutting unit 30 is disposed in the x direction of the second driving roller 25 and the second passive roller 27, and includes a link 31 supporting the contact material R, a cutting link 32 having an upper blade 32a, a cutting cam 33 driving the cutting link 32 in the z direction, a cutting cam servomotor 34 rotating the cutting cam 33, a lower blade guide 35 pressing the contact material R, and a lower blade 36 cutting the contact material R. The cutting cam servomotor 34 is an example of a cutting drive device.

[0019] The link 31 includes a third guide path 31a for sliding in the x direction through the contact material R therethrough, a link rotation axis 31b located at the center of the central axis Ra of the contact material R, and a contact material support part 31c extending from the third guide path 31a and supporting the contact material R from the lower surface thereof. One end of a tension spring 31d is fixedly supported at its other end and connected to the link 31. When the tension spring 31d is in a compressed state, the third guide path 31a is arranged on the same central axis as the first guide path 14a of the first guide member 14 and the second guide path 24a of the second guide member 24.

[0020] The cutting link 32 is disposed in the x direction of the link 31 and moves freely in the z direction. The cutting link 32 has an upper blade 32a fixed to one end and a cam follower 32b rotatably provided at the other end. The cam follower 32b is disposed along the contour shape of the cutting cam 33. A rotating shaft 33a is connected to the cutting cam 33 and rotates about the rotating shaft 33a. A rotating shaft of a servo motor 34 for the cutting cam is coaxially connected to the rotating shaft 33a, and the cutting cam 33 is rotated by driving the servo motor 34 for the cutting cam to rotate.

[0021] The lower blade guide 35 is disposed in the x direction of the cutting link 32, and is disposed in a position in contact with the upper surface of the contact material R. The lower blade 36 is provided in a position in contact with the lower surface of the contact material R. The lower blade guide 35 has a shape in which a relief is provided at the lower position of the cutting link 32 described above, and faces the lower blade guide 35 across the contact material R. The lower blade guide 35 and the lower blade 36 form a fourth guide path 37, and are disposed on the same central axis as the third guide path 31a.

[0022] Welding section 40 is disposed in the x direction of lower blade guide 35 and lower blade 36 and includes a freely rotating welding link 41, a lower electrode 42 that passes a current through contact material R, a welding cam 43 that drives welding link 41, and a welding cam servomotor 44 that rotates welding cam 43. Welding cam servomotor 44 is an example of a welding drive device.

[0023] The welding link 41 has an upper electrode 41a and a cam follower 41b. The cam follower 41b is arranged along the contour shape of the welding cam 43. A welding cam rotation shaft 43a is connected to the welding cam 43, and the welding cam rotates about the welding cam rotation shaft 43a. A rotation shaft of a welding cam servomotor 44 is coaxially connected to the welding cam rotation shaft 43a, and the welding cam 43 is rotated by driving and rotating the welding cam servomotor 44. The lower electrode 42 is located below the fourth guide path 37 in the x direction, and the contact support S is placed thereon.

[0024] 4, the control device 200 is connected to the first drive roller servomotor 22, the second drive roller servomotor 26, the cutting cam servomotor 34, the welding cam servomotor 44, and the upper electrode 41a, and controls the first drive roller servomotor 22, the second drive roller servomotor 26, the cutting cam servomotor 34, the welding cam servomotor 44, and the upper electrode 41a, respectively. The control device 200 includes a control unit 210, an operation unit 220, a drive roller servomotor amplifier 230, a cutting cam servomotor amplifier 240, a welding cam servomotor amplifier 250, and an upper electrode controller 260.

[0025] 5, control unit 210 has a processor 201 that performs processing for controlling welding device 100, a main memory unit 202 that is used as a working area for processor 201, and an auxiliary memory unit 203 that stores various data and programs used in the processing by processor 201. Both main memory unit 202 and auxiliary memory unit 203 are connected to processor 201 via bus 204.

[0026] Processor 201 includes a micro processing unit (MPU). Processor 201 executes programs stored in auxiliary storage unit 203 to realize various functions of welding device 100.

[0027] Main memory unit 202 includes a RAM (Random Access Memory). Programs are loaded into main memory unit 202 from auxiliary memory unit 203. Main memory unit 202 is used as a working area for processor 201, and stores data including parameters for controlling welding device 100.

[0028] The auxiliary storage unit 203 includes a non-volatile memory such as an EEPROM (Electrically Erasable Programmable Read-Only Memory). In addition to programs, the auxiliary storage unit 203 stores various data used in the processing of the processor 201. The auxiliary storage unit 203 supplies the processor 201 with data used by the processor 201 in accordance with instructions from the processor 201, and stores the data supplied from the processor 201.

[0029] As shown in Fig. 4, the operation unit 220 receives instructions to start and end processing based on user input. The operation unit 220 includes a keyboard or a touch panel display. Specifically, the operation unit 220 receives data indicating a cutting length L1, which is a reference length for cutting the contact material R, and a length L2 from the cutting position to a planned welding position of the contact material Rc after cutting that is to be resistance-welded onto the contact support S. The length L2 is an example of data indicating the planned welding position.

[0030] The drive roller servomotor amplifier 230 performs synchronous control of the rotation speed and rotation angle of the first drive roller servomotor 22 and the second drive roller servomotor 26 under the control of the control unit 210. As a result, based on the cutting length L1 of the contact material R and the length L2 from the cutting position to the planned welding position, the feed and pull back stroke amounts are calculated from the roller diameters of the first drive roller 21 and the second drive roller 25 and the rotation angles of the first drive roller servomotor 22 and the second drive roller servomotor 26, and are controlled by quantitative values.

[0031] The servo motor amplifier 240 for the cutting cam can adjust the timing of the up and down movement of the cutting link 32 provided with the upper blade 32a based on the control of the control unit 210, and when the movement time of the contact material R changes due to a change in the stroke amount of the feeding and pulling back of the contact material R accompanying a change in the value of the cutting length L1 of the contact material R, the operation timing is changed and the cutting link 32 is operated at a timing where the upper blade 32a and the contact material R do not come into contact with each other.

[0032] The welding cam servo motor amplifier 250 can adjust the timing of the operation of the welding link 41 provided with the upper electrode 41a under the control of the control unit 210, and changes the operation timing to match the timing at which the transfer of the cut contact material Rc is completed when the stroke amount for feeding the contact material R and pushing and transferring the cut contact material Rc changes in accordance with changes in the values ​​of the cut length L1 of the contact material R and the length L2 from the cutting position to the planned welding position. This also changes the timing at which the welding link 41 comes into contact with the cut contact material Rc.

[0033] Based on the control of the control unit 210, the upper electrode controller 260, in cooperation with the welding cam servo motor amplifier 250, changes the timing of flowing current to the upper electrode 41a, thereby matching the timing of resistance welding with the timing at which the welding link 41 comes into contact with the contact material Rc after cutting.

[0034] The control unit 210 executes the programs stored in the auxiliary storage unit 203 to function as a transfer control unit 211, a cutting control unit 212, and a welding control unit 213.

[0035] The conveyance control unit 211 acquires data indicating the cutting length L1 of the contact material R and the length L2 from the cutting position to the planned welding position inputted to the operation unit 220, and controls the servo motor 22 for the first driving roller and the servo motor 26 for the second driving roller to feed the contact material R in the x direction and pull back the contact material R in the -x direction. In detail, the conveyance control unit 211 feeds the contact material R in the x direction to a position where the contact material R is cut to the cutting length L1 in the cutting unit 30. Next, when the conveyance control unit 211 feeds the contact material R to the preset cutting length L1 of the contact, it stops the rotational driving of the servo motor 22 for the first driving roller and the servo motor 26 for the second driving roller, and fixes the position of the contact material R. When the contact material R is cut to the cutting length L1 in the cutting unit 30, the conveyance control unit 211 feeds the contact material R by the length L2 from the cutting position to the planned welding position, and transfers the cut contact material Rc onto the contact support S, which is the planned welding position. The contact material Rc is a cut piece of the contact material R. Next, the transport control unit 211 pulls the contact material R back to a position that is a cutting length L1, with the lowered position of the upper blade 32a as the base point. The length L3 of the pulled back contact material R is the length obtained by subtracting the cutting length L1 from the length L2 from the cutting position to the intended welding position.

[0036] The cutting control unit 212 controls the servo motor 34 for the cutting cam to cut the contact material R to the cutting length L1 of the contact. In detail, after the contact material R is fed to the preset cutting length L1 of the contact, the cutting control unit 212 rotates the servo motor 34 for the cutting cam clockwise in synchronization with the timing at which the rotational drive of the servo motor 22 for the first driving roller and the servo motor 26 for the second driving roller stops and the position of the contact material R is fixed, thereby rotating the cutting cam 33 connected on the same axis. As a result, the cutting link 32 is lowered in the -z direction by the cam follower 32b that moves along the contour shape of the cutting cam 33. As a result, the contact material R is cut by the descending upper blade 32a and lower blade 36. The cutting control unit 212 further rotates the servo motor 34 for the cutting cam clockwise to move the lowered cutting link 32 upward.

[0037] The welding control unit 213 controls the servo motor 44 for the welding cam and the upper electrode controller 260 to weld the cut contact material Rc to the contact support S. In detail, the welding control unit 213 rotates the servo motor 44 for the welding cam clockwise in synchronization with the timing when the contact material Rc is placed on the contact support S, thereby rotating the welding cam 43 connected on the same axis. As a result, the welding link 41 is lowered vertically downward by the cam follower 41b that moves along the contour shape of the welding cam 43. As a result, the upper electrode 41a provided on the welding link 41 is pressed against the contact material Rc. Next, the welding control unit 213 controls the upper electrode controller 260 to pass a current from the upper electrode 41a to the lower electrode 42, and the contact material Rc is resistance-welded to the contact support S.

[0038] Next, a welding process performed by the welding device 100 having the above configuration will be described for an example in which the welding device 100 welds the contact material R shown in FIG. 2 to the contact support S.

[0039] In response to a user's instruction to start the process, welding apparatus 100 starts the welding process shown in Fig. 6. The welding process executed by welding apparatus 100 will be described below with reference to a flowchart.

[0040] When the welding process is started, the transport control unit 211 acquires data indicating the cutting length L1 of the contact material R and the length L2 from the cutting position to the planned welding position input to the operation unit 220, and stores the data in the main memory unit 202 (step S101).

[0041] Next, as shown in FIG. 7, the transport control section 211 sends out the contact material R in the x direction to a position where the contact material R is cut to the cutting length L1 in the cutting section 30 (step S102).

[0042] In detail, the contact material R inserted into the first guide path 14a provided inside the first guide member 14 is fed between the first drive roller 21 and the first passive roller 23, and is sandwiched between the first drive roller 21 and the first passive roller 23. The conveyance control unit 211 rotates the servo motor 22 for the first drive roller clockwise, so that the contact material R arranged between the first drive roller 21 and the first passive roller 23 is fed into the second guide path 24a provided in the second guide member 24 by the rotation of the first drive roller 21. At this time, the first passive roller 23 sandwiches the contact material R while rotating counterclockwise due to the movement of the fed contact material R.

[0043] The contact material R that has passed through the inside of the second guide path 24a and has been sent further forward is sent between the second driving roller 25 and the second passive roller 27, and is sandwiched between the second driving roller 25 and the second passive roller 27. The conveyance control unit 211 drives the second driving roller servomotor 26 to rotate clockwise, so that the contact material R between the second driving roller 25 and the second passive roller 27 is sent into the third guide path 31a provided in the link 31 by the rotation of the second driving roller 25. At this time, the second passive roller 27 sandwiches the contact material R while rotating counterclockwise due to the movement of the contact material R being sent in.

[0044] When the conveying control unit 211 has fed the contact material R, which has passed through the inside of the third guide path 31a and been fed into the inside of the fourth guide path 37, to a preset contact cutting length L1, using the lowered position of the upper blade 32a as the base point, it stops the rotational driving of the servo motor 22 for the first drive roller and the servo motor 26 for the second drive roller, and fixes the position of the contact material R.

[0045] At this time, the upper blade 32a moves linearly in the z direction, and the link 31 stops at a position where the third guide path 31a and the fourth guide path 37 are aligned in the same straight line. In addition, the fed contact material R is held at two points, that is, sandwiched between the first driving roller 21 and the first passive roller 23 and sandwiched between the second driving roller 25 and the second passive roller 27, so there is little risk of it sliding in the x direction or the -x direction.

[0046] Next, the cutting control unit 212 cuts the contact material R to the cutting length L1 of the contact as shown in FIG. 8 (step S103). Step S103 is an example of a cutting step. In detail, the cutting control unit 212 rotates the cutting cam servo motor 34 clockwise in synchronization with the timing when the contact material R is fed to the preset cutting length L1 of the contact, thereby rotating the cutting cam 33 connected on the same axis. As a result, the cutting link 32 is lowered in the -z direction by the cam follower 32b that moves along the contour shape of the cutting cam 33. Also, the upper blade 32a provided on the cutting link 32 moves to a position where it blocks the fourth guide path 37 while contacting the upper surface of the contact material R. The link 31 is pushed vertically downward by the lowered upper blade 32a via the contact material R left on the upper surface of the contact material support unit 31c, so that the link 31 avoids interference with the upper blade 32a by rotating clockwise around the link rotation shaft 31b as the rotation center. At this time, the contact material R is cut by the descending upper blade 32a and lower blade 36.

[0047] The cutting control unit 212 further rotates the cutting cam servo motor 34 clockwise to raise the lowered cutting link 32, and the angular posture of the link 31, which had been rotated by the lowered upper blade 32a through the contact material R remaining on the upper surface of the contact material support portion 31c, is returned by the spring force of the tension spring 31d to a position where the third guide path 31a and the fourth guide path 37 are aligned in the same straight line.

[0048] 9, the conveyance control unit 211 sends out the contact material R and transfers the cut contact material Rc onto the contact support S, which is the planned welding position (step S104). In detail, the conveyance control unit 211 drives the first drive roller servomotor 22 and the second drive roller servomotor 26 to rotate clockwise again, thereby feeding the contact material R in the x direction by a length L2 from the cutting position to the planned welding position, thereby pushing out the cut contact material Rc in the fourth guide path 37 and transferring it onto the contact support S. The cutting position is based on the lowered position of the upper blade 32a.

[0049] Next, the conveyance control unit 211 pulls back the contact material R to a position that corresponds to the cutting length L1 (step S105), as shown in Fig. 10. Steps S102, S104, and S105 are an example of a conveyance process. In detail, the conveyance control unit 211 rotates the first driving roller servomotor 22 and the second driving roller servomotor 26 counterclockwise to pull back the contact material R to a position that corresponds to the cutting length L1, starting from the lowered position of the upper blade 32a. The length L3 of the pulled back contact material R is the length obtained by subtracting the cutting length L1 from the length L2 from the cutting position to the planned welding position. Thereafter, the conveying control unit 211 pulls back the contact material R, which has passed through the inside of the third guide path 31a and been sent into the inside of the fourth guide path 37, to the preset contact cutting length L1, using the lowered position of the upper blade 32a as the base point, and then stops the rotational driving of the servo motor 22 for the first drive roller and the servo motor 26 for the second drive roller, and fixes the position of the contact material R.

[0050] Next, the welding control unit 213 welds the cut contact material Rc to the contact support S (step S106). Step S106 is an example of a welding process. In detail, the welding control unit 213 rotates the welding cam 43 connected coaxially by driving the welding cam servo motor 44 to rotate clockwise in synchronization with the timing when the contact material Rc is placed on the contact support S. As a result, the welding link 41 is lowered in the -z direction by the cam follower 41b that moves along the contour shape of the welding cam 43. As a result, the upper electrode 41a provided on the welding link 41 is pressed against the contact material Rc. Next, the welding control unit 213 controls the upper electrode controller 260 to pass a current from the upper electrode 41a to the lower electrode 42, and the contact material Rc is resistance-welded to the contact support S. At this point, the contact material R has been pulled back, and therefore the contact material Rc after cutting during resistance welding is separated from the contact material R on the contact material support portion 31c, thereby preventing the welding current from flowing to the contact material R. Next, the cutting control portion 212 further rotates the welding cam servo motor 44 clockwise to move the lowered welding link 41 upward.

[0051] Next, the transfer control unit 211 determines whether or not an end instruction has been input (step S107). If it is determined that an end instruction has not been input (step S107; No), the process returns to step S103, and steps S103 to S107 are repeated. If it is determined that an end instruction has been input (step S107; Yes), the welding process is terminated.

[0052] As described above, according to the welding device 100 and the welding method of the present embodiment, the conveying section 20, the cutting section 30, and the welding section 40 are independently controlled, so that the cutting length L1 of the contact material R and the length L2 from the cutting position to the planned welding position can be easily changed. Also, based on the data indicating the cutting length L1 of the contact material R and the length L2 from the cutting position to the planned welding position, the contact material R can be cut and welded to the planned welding position. Therefore, by inputting and setting the cutting length L1 of the contact material R and the length L2 from the cutting position to the planned welding position into the operation section 220 by the user, the cutting length L1 of the contact material R and the length L2 from the cutting position to the planned welding position can be easily changed. This makes it possible to respond to the production of a wide variety of contact materials R with different dimensions. Also, since the operation timings of conveying, cutting, and welding the contact material R can be adjusted separately, the change in the cutting length L1 of the contact material R due to a change in product design and the change in the planned welding position of the contact material Rc after cutting can be handled without changing the configuration of this mechanism. In addition, since the conveying section 20 and the cutting section 30 are configured independently, the structure of the mechanism is simplified, unnecessary operations during conveying the contact material R are eliminated, and the upper blade 32a is easily accessible, improving maintainability. Furthermore, the amount and timing of the movements of conveying, cutting, and welding can be quantitatively adjusted for each axis, and the movement timing, movement speed, or movement amount can be adjusted even during the operation of the device, improving the quality of the contact welding.

[0053] (Modification) In the above embodiment, an example has been described in which the conveying unit 20 provided in the welding device 100 calculates the stroke amount of the feed and pull back from the roller diameters of the first driving roller 21 and the second driving roller 25 and the rotation angles of the servo motor 22 for the first driving roller and the servo motor 26 for the second driving roller to control it with a quantitative value. As shown in FIG. 11, the welding device 100 may further include a first measuring instrument 38 for measuring the cutting length L1 of the contact material R cut from the descended position of the upper blade 32a as a base point, and a second measuring instrument 45 for measuring the position of the contact material Rc arranged on the contact support S. The first measuring instrument 38 and the second measuring instrument 45 include laser displacement meters. The first measuring instrument 38 measures the position of the end of the contact material from a hole 35a provided in the lower blade guide 35 to measure the cutting length L1. This allows the difference between a preset target value of the cutting length L1 and the actual measured value of the cutting length L1 to be measured in real time, and the rotation angles of the first driving roller servo motor 22 and the second driving roller servo motor 26 are minutely changed based on the difference between the target value and the actual measured value to correct the feed amount and pull back amount of the contact material R, adjust the cutting length L1, and improve the accuracy of the length dimension of the cutting length L1 of the contact material R. Also, the second measuring instrument 45 measures the length L4 from the second measuring instrument 45 to the contact material Rc after cutting, and measures the difference between the planned welding position of the contact material Rc after cutting and the actual measured value of the position of the contact material Rc after cutting in real time, and the rotation angles of the first driving roller servo motor 22 and the second driving roller servo motor 26 are minutely changed based on the position of the contact material R measured by the second measuring instrument 45 to adjust the feed amount and pull back amount of the contact material R, and correct the position of the contact material Rc after cutting. This makes it possible to improve the accuracy of the welding position of the contact material Rc after cutting.

[0054] In the above embodiment, an example has been described in which the cutting link 32 and the welding link 41 are linearly moved in the z direction by using the cutting cam 33 and the welding cam 43. The cutting section 30 is only required to be able to cut the contact material R. The welding section 40 is only required to be able to weld the cut contact material Rc to the contact support S. For this reason, the configuration for linearly moving the cutting link 32 and the welding link 41 may be replaced with another mechanism capable of converting rotational motion into linear motion. As shown in FIG. 12, a slider crank mechanism may be provided in which a first link 39b is fixedly connected at one end to a rotating shaft 34a of the servo motor 34 for the cutting cam and a first joint 39a is provided at the other end, and a second link 39c is provided with one end of which freely rotates around the first joint 39a, and a second joint 39d is provided at the other end of the second link 39c and is connected to the cutting link 32. Similarly, the welding link 41 may be replaced with a slider crank mechanism in which one end of the third link 46b is fixedly connected to the rotating shaft 44a of the servo motor 44 for the welding cam and the other end of the third link 46b is provided with a third joint 46a, and one end of the fourth link 46c is freely rotatable around the third joint 46a, and a fourth joint 46d provided at the other end of the fourth link 46c is connected to the welding link 41. According to this configuration, instead of mechanical parts such as the cutting cam 33 and the welding cam 43 shown in FIG. 2, which are complicated in shape and difficult to design, a simple configuration can be achieved, and therefore the mechanical design of the cutting unit 30 and the cutting unit 30 can be simplified. Although servo motors are used as the servo motor 34 for the cutting cam and the servo motor 44 for the welding cam, other motors including a stepping motor may be used.

[0055] 13, the cutting unit 30 may have a cutting cylinder 51 as a cutting drive device that linearly moves the cutting link 32 in the z direction, and the cutting unit 30 may have a welding cylinder 52 as a welding drive device that linearly moves the welding link 41 in the z direction. The cutting cylinder 51 and the welding cylinder 52 have cylinder tubes 51a, 52a and pistons 51b, 52b, and are driven by a fluid including gas or liquid. In this case, the configuration can be made simpler than the slider crank mechanism, and the mechanical design of the cutting unit 30 and the cutting unit 30 becomes even simpler.

[0056] In the above-mentioned embodiment, an example has been described in which the servo motor 22 for the first drive roller and the servo motor 26 for the second drive roller are used as the transport drive device. The transport drive device may be any device capable of transporting the contact material R by the first drive roller 21 and the second drive roller 25, and may be a stepping motor. In the above-mentioned embodiment, an example has been described in which the transport unit 20 includes the first drive roller 21 and the second drive roller 25 for transporting the contact material R, but the transport unit 20 may be configured to transport the contact material R by a configuration other than the first drive roller 21 and the second drive roller 25, as long as it is capable of transporting the contact material R.

[0057] In the above embodiment, an example in which the conveying section 20, the cutting section 30, and the welding section 40 are arranged in a row has been described. In this case, one contact welding is realized in one cycle. The conveying section 20, the cutting section 30, and the welding section 40 of the same configuration may be configured adjacent to each other in parallel, and the operations of the conveying section 20, the cutting section 30, and the welding section 40 may be linked. In this case, as shown in FIG. 14, the conveying section 20 has a first conveying section 20a and a second conveying section 20b. The cutting section 30 has a first cutting section 30a and a second cutting section 30b. The welding section 40 has a first welding section 40a and a second welding section 40b. The first conveying section 20a, the first cutting section 30a, and the first welding section 40a, and the second conveying section 20b, the second cutting section 30b, and the second welding section 40b are arranged in parallel. The first conveying section 20a and the second conveying section 20b share the first drive roller servo motor 22' and the second drive roller servo motor 26' as one conveying drive device. The first drive roller servo motor 22' is fixed coaxially with the rotating shaft 21a'. The second drive roller servo motor 26' is fixed coaxially with the rotating shaft 25a'. The first cutting section 30a and the second cutting section 30b share the cutting cam servo motor 34' as one cutting drive device. The rotating shaft 33a' of the cutting cam servo motor 34 is extended on the axis and fixed to the rotating shaft 33a' of the second cutting section 30b and the second welding section 40b. The first welding section 40a and the second welding section 40b share the welding cam servo motor 44' as one welding drive device. Similarly, the servo motor 44' for the welding cam has a rotating shaft 43a' extended on the shaft and fixed to the rotating shaft 43a' of the first welding portion 40a and the second welding portion 40b. With this configuration, the movement amount and movement timing of the conveying unit 20, the cutting unit 30 and the welding unit 40 of the welding device 100, which are the same mechanism, can be synchronized, thereby realizing contact welding of a plurality of points with the same contact material with the same cutting length and welding position in one cycle, and reducing the drive source by sharing the servo motor among a plurality of welding devices 100.

[0058] Various embodiments and modifications of the present disclosure are possible without departing from the broad spirit and scope of the present disclosure. The above-described embodiments are for explaining the present disclosure and do not limit the scope of the present disclosure. That is, the scope of the present disclosure is indicated by the claims, not the embodiments. Various modifications made within the scope of the claims and the scope of the disclosure equivalent thereto are considered to be within the scope of the present disclosure. [Explanation of symbols]

[0059] 10 supply section, 11 base plate, 12 support section, 13 reel frame, 14 first guide member, 14a first guide path, 20 conveying section, 20a first conveying section, 20b second conveying section, 21 first driving roller, 21a, 21a', 23a, 25a, 25a', 27a, 33a, 33a', 34a, 43a, 43a', 44a rotating shaft, 22, 22' servo motor for first driving roller, 23 first passive roller, 23b, 27b compression spring, 24 second guide member, 24a second guide path, 25 second driving roller, 26, 26' servo motor for second driving roller, 27 second passive roller, 30 cutting section, 30a first cutting section, 30b second cutting section, 31 Link, 31a third guideway, 31b link rotation shaft, 31c contact material support, 31d tension spring, 32 cutting link, 32a upper blade, 32b cam follower, 33 cutting cam, 34, 34' cutting cam servomotor, 35 lower blade guide, 35a hole, 36 lower blade, 37 fourth guideway, 38 first measuring device, 39a first joint, 39b first link, 39c second link, 39d second joint, 40 welded portion, 40a first welded portion, 40b second welded portion, 41 welding link, 41a upper electrode, 41b cam follower, 42 lower electrode, 43 welding cam, 44, 44' welding cam servomotor, 45 second measuring device, 46a third joint, 46b third link, 46c 4th link, 46d 4th joint, 51 cutting cylinder, 52 welding cylinder, 51a, 52a cylinder tube, 51b, 52b piston, 100 welding device, 200 control device, 201 processor, 202 main memory unit, 203 auxiliary memory unit, 204 bus, 210 control unit, 211 conveyance control unit, 212 cutting control unit, 213 welding control unit, 220 operation unit, 230 servo motor amplifier for drive roller, 240 servo motor amplifier for cutting cam, 250 servo motor amplifier for welding cam, 260 upper electrode controller, L1 cutting length, L2, L3, L4 length, R, Rc contact material, Ra center shaft, S contact support.

Claims

1. a conveying section for feeding and pulling back the linear or tape-shaped contact material in an extending direction of the contact material; a cutting section that cuts the contact material conveyed to the conveying section; a welding portion for welding the contact material cut off by the cutting portion to a contact support; a first gauge for measuring a distance from a cut location to an end of the contact material; Equipped with the conveying unit places the cut contact material at a planned welding position on the contact support, and then pulls back the contact material to be cut to a cutting position where the contact material is cut to a reference length by the cutting unit, and adjusts the amount of the contact material to be fed or pulled back based on the distance from the cutting position to an end of the contact material measured by the first measuring instrument. Welding equipment.

2. A conveying section that feeds and pulls back a linear or tape-shaped contact material in a direction in which the contact material extends; a cutting section that cuts the contact material conveyed to the conveying section; a welding portion for welding the contact material cut off by the cutting portion to a contact support; a second gauge for measuring the position of the contact material disposed on the contact carrier; Equipped with the conveying unit places the cut contact material at a planned welding position on the contact support, and then pulls back the contact material to be cut to a cutting position where the contact material is cut to a reference length by the cutting unit, and adjusts the amount of the contact material to be fed or pulled back based on the position of the contact material measured by the second measuring device. Welding equipment.

3. A conveying section that feeds and pulls back a linear or tape-shaped contact material in a direction in which the contact material extends; a cutting section that cuts the contact material conveyed to the conveying section; a welding portion for welding the contact material cut off by the cutting portion to a contact support; A control unit that controls the conveying unit and the cutting unit; an operation unit that receives data indicating a reference length for cutting the contact material; Equipped with the conveying section places the cut contact material at a position on the contact support body where welding is to be performed, and then pulls back the contact material to be cut to a cutting position where the contact material is cut to a reference length by the cutting section; when the operation unit receives data indicating the reference length, the control unit controls the transport unit based on the data indicating the reference length to feed and pull back the contact material to a cutting position where the contact material is cut to the reference length by the cutting unit. Welding equipment.

4. A conveying section that feeds and pulls back a linear or tape-shaped contact material in a direction in which the contact material extends; a cutting section that cuts the contact material conveyed to the conveying section; a welding portion for welding the contact material cut off by the cutting portion to a contact support; A control unit that controls the conveying unit and the cutting unit; an operation unit that receives data indicating a planned welding position for welding the contact material after cutting; Equipped with the conveying section places the cut contact material at a position on the contact support body where welding is to be performed, and then pulls back the contact material to be cut to a cutting position where the contact material is cut to a reference length by the cutting section; when the operation unit receives data indicating the planned welding position, the control unit controls the conveying unit based on the data indicating the planned welding position to feed the contact material to be cut, thereby disposing the contact material cut by the cutting unit at the planned welding position on the contact support body. Welding equipment.

5. The welding portion welds the cut contact material to the contact support after the contact material to be cut is pulled back to a cutting position where the cutting portion cuts the contact material to a reference length. A welding device according to any one of claims 1 to 4.

6. The conveying section has a first conveying section and a second conveying section, the cutting section has a first cutting section and a second cutting section, and the welding section has a first welded section and a second welded section, The first conveying section, the first cutting section, and the first welding section, and the second conveying section, the second cutting section, and the second welding section are arranged in parallel, the first conveying unit and the second conveying unit share one conveying drive device, the first cutting unit and the second cutting unit share one cutting drive device, and the first welding unit and the second welding unit share one welding drive device; A welding device according to any one of claims 1 to 5.

7. a conveying step of feeding and pulling back a linear or tape-shaped contact material in an extending direction of the contact material; a cutting step of cutting the contact material transported in the transporting step; a welding step of welding the contact material cut in the cutting step to a contact support; a measuring step of measuring a distance from a cut location to an end of the contact material; Equipped with in the conveying step, the cut contact material is placed at a planned welding position on the contact support, and then the contact material to be cut is pulled back to a cutting position where the contact material is cut to a reference length in the cutting step, and an amount of the contact material to be fed or pulled back is adjusted based on the distance from the cutting position to an end of the contact material measured in the measuring step. Welding method.

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