CN215880435U

CN215880435U - Automatic metering device for welding wire of surfacing machine tool

Info

Publication number: CN215880435U
Application number: CN202121367155.0U
Authority: CN
Inventors: 刘爱民; 赵云海; 胡景祥; 路东瑶; 吴延祥
Original assignee: Xingtai Delong Machinery & Mill Roll Co ltd
Current assignee: Xingtai Delong Machinery & Mill Roll Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-02-22
Anticipated expiration: 2031-06-18

Abstract

The utility model provides an automatic welding wire metering device of a surfacing machine tool, which comprises an installation base, a material conveying unit and a metering unit, wherein the material conveying unit and the metering unit are arranged on the installation base, and the automatic welding wire metering device comprises: the mounting base is provided with a mounting bracket; the material conveying unit comprises an upper feeding wheel which is rotatably connected to the mounting bracket and a lower feeding wheel which is rotatably connected to the mounting base; the upper feeding wheel and the lower feeding wheel can be driven by welding wires to rotate; the metering unit is arranged on one side of the material conveying unit and is used for detecting the number of rotation turns of the lower feeding wheel. According to the automatic metering device for the welding wires of the surfacing machine tool, the welding wires can be placed between the upper feeding wheel and the lower feeding wheel, one end of each welding wire is connected with the surfacing machine tool, when the surfacing machine tool uses the welding wires, the welding wires move to drive the lower feeding wheel to move, the movement of the lower feeding wheel is detected by the meter counting unit, the number of consumed meters of the welding wires is obtained, the convenience of metering the consumption of the welding wires is effectively improved, and the working efficiency is improved.

Description

Automatic metering device for welding wire of surfacing machine tool

Technical Field

The utility model relates to the technical field of welding appliances of engineering machinery, in particular to an automatic metering device for a welding wire of a surfacing welding machine tool.

Background

For a long time, in the process of welding operation, when a technician researches a welding process and calculates cost consumption, the actual consumption of a welding wire of a single workpiece or a certain important welding seam is expected to be accurately calculated. The consumption of welding wire by a welded part or a single weld is an important data in welding operations, which the process personnel need to accurately meter for process research and single part cost accounting. However, the current metering mode is generally manual load-bearing counting, which wastes time and labor, and leads to low welding wire metering working efficiency.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to provide an automatic welding wire metering device for a bead welding machine, so as to improve the working efficiency of welding wire metering.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a build-up welding lathe welding wire automatic metering device for the length of the welding wire of measurement conveying, a serial communication port, automatic metering device is in including installation base, setting defeated material unit and the metering unit on the installation base, wherein: the mounting base is provided with a mounting bracket; the material conveying unit comprises an upper feeding wheel which is rotatably connected to the mounting bracket and a lower feeding wheel which is rotatably connected to the mounting base; the upper feeding wheel and the lower feeding wheel are mutually abutted, and the upper feeding wheel and the lower feeding wheel can be driven by the welding wire to rotate; the metering unit is arranged on one side of the material conveying unit and used for detecting the number of rotation turns of the lower feeding wheel.

Further, the upper feeding wheel and the lower feeding wheel are both made of insulating materials.

Furthermore, grooves for accommodating welding wires are formed in the outer peripheral surfaces of the upper feeding wheel and the lower feeding wheel.

Furthermore, the mounting bracket comprises a support rod fixedly arranged on the mounting base, one end of the support rod, far away from the mounting base, is pivotally connected with a mounting rod, and the upper feeding wheel is rotatably connected to the mounting rod.

Furthermore, a counterweight is sleeved on the mounting rod.

Further, the weight member includes a weight ring fitted over the mounting rod, the weight ring being manipulated to be slidable on the mounting rod.

Furthermore, a limiting assembly used for limiting the position of the counterweight part is arranged on the mounting rod.

Furthermore, spacing subassembly includes a plurality of gag lever posts and sets up a plurality of spacing holes on the installation pole, the gag lever post can pass to be established spacing downthehole.

Compared with the prior art, the utility model has the following advantages:

(1) the welding wire can be placed between the upper feeding wheel and the lower feeding wheel firstly, one end of the welding wire is connected with the surfacing machine tool, when the surfacing machine tool uses the welding wire, the welding wire moves and then drives the lower feeding wheel to move, the number of moving turns of the lower feeding wheel is detected by the meter counting unit, and then the number of consumed meters of the welding wire is obtained, so that the convenience for metering the consumption of the welding wire is effectively improved, and the working efficiency is improved.

(2) Because of the surfacing lathe needs electric drive at the in-process that uses, through setting up upper feeding wheel and lower feeding wheel into insulating material, the effectual accident of avoiding producing the short circuit.

(3) Through set up the recess on the outer peripheral face of last feeding wheel and lower feeding wheel, can effectual increase welding wire and go up the frictional force between feeding wheel, the lower feeding wheel, take place relative slip with last feeding wheel, lower feeding wheel when preventing the welding wire motion.

(4) The welding wire installation device has the advantages that the installation rod can rotate by taking the pivot connection part as an axis, the upper feeding wheel rotates synchronously, the distance between the upper feeding wheel and the lower feeding wheel changes, welding wires can be conveniently installed, the welding wire installation device is adaptable to welding wires of different sizes, and the lower feeding wheel compresses the welding wires under the action of gravity of the lower feeding wheel.

(5) Through setting up the counterweight, guarantee that the feeding wheel has sufficient pressure to the welding wire to guarantee to have sufficient frictional force between feeding wheel and the welding wire and prevent that welding wire and upper feeding wheel, lower feeding wheel can not take place relative slip.

(6) The balance weight piece can be slid on the mounting rod to adjust the pressure of the upper feeding wheel to the welding wire, so that the welding wire balance device is suitable for different moving speeds of the welding wire, and the welding wire is prevented from sliding.

(7) The position of the counterweight can be fixed by arranging the limiting assembly, the counterweight is prevented from changing in position, and the stability of the pressure of the upper feeding wheel to the welding wire is further ensured.

(8) After the counterweight piece is moved to a preset position, the limiting rods can be arranged in the limiting holes on the two sides of the counterweight piece in a penetrating mode, and then the position of the counterweight piece is limited.

Another objective of the present invention is to provide a surfacing machine tool, which includes a bed body, and is characterized in that: and the bed body is provided with an automatic welding wire metering device of the surfacing machine tool.

Further, be equipped with the installation heavy groove that is used for holding the installation base on the lathe bed, the week side of installation heavy groove is equipped with and is used for the joint unit of installation base, it includes the elastic component, and by the locating part that the elastic component pushed up, the elastic component can be because of the installation base supports and presses the locating part and the energy storage, the elastic component can be because of releasing energy by the locating part prevents the installation base from deviate from in the installation heavy groove.

Compared with the prior art, the method has the following advantages: through setting up heavy groove of installation and joint unit, the effectual convenience that has improved automatic metering device and install on the build-up welding lathe, and the joint unit multiplicable automatic metering device installs the stability on the build-up welding lathe.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, illustrate embodiments of the utility model and together with the description serve to explain the utility model, and the description is given by way of example only and without limitation to the terms of relative positions. In the drawings:

fig. 1 is a schematic view of the overall structure of a surfacing machine tool in which an automatic metering device for welding wire of the surfacing machine tool according to a first embodiment of the utility model is installed in a second embodiment of the surfacing machine tool according to the first embodiment of the utility model;

fig. 2 is an exploded schematic view of the automatic metering device for welding wire of a surfacing machine tool according to a first embodiment of the utility model, which is mounted on the surfacing machine tool according to a second embodiment of the utility model;

fig. 3 is an enlarged view of the portion a shown in fig. 2 according to an embodiment of the present invention.

Description of reference numerals:

1. installing a base; 2. a material conveying unit; 21. a support plate; 22. a first rotating shaft; 23. a lower feed wheel; 24. mounting a bracket; 241. a support bar; 242. a pivot assembly; 2421. mounting a plate; 2422. a baffle plate; 2423. A pivotal shaft; 243. mounting a rod; 244. a counterweight; 245. a limiting component; 2451. a limiting rod; 2452. A limiting hole; 25. a second rotating shaft; 26. an upper feeding wheel; 27. a groove; 3. a metering unit; 31. a meter counter; 32. a fixing plate; 33. an inductor; 34. a data line; 35. a sensing member; 4. installing a sink tank; 5. A clamping unit; 51. a carrier plate; 52. a limiting member; 521. a movable plate; 522. a clamping block; 5221. a chamfer plane; 523. a limiting plate; 53. a guide bar; 54. an elastic member.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are to be construed as indicating or implying any particular importance.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The embodiment one relates to an automatic metering device of a welding wire of a surfacing machine tool, which comprises an installation base 1, a material conveying unit 2 and a metering unit 3, wherein the material conveying unit 2 and the metering unit 3 are arranged on the installation base 1, the installation base 1 is a rectangular plate horizontally arranged, and the automatic metering device of the welding wire of the surfacing machine tool can be installed on the surfacing machine tool through the installation base 1.

As shown in fig. 2, the feeding unit includes a supporting plate 21 fixed on the installation base 1, the supporting plate 21 is a rectangular plate, a side edge of the supporting plate 21 in a width direction is fixed on the installation base 1, the supporting plate 21 is perpendicular to the installation base 1, and the width direction of the supporting plate 21 is the same as the length direction of the installation base 1; one end of the supporting plate 21 far away from the mounting base 1 is rotatably connected with a first rotating shaft 22, and a lower feeding wheel 23 is fixedly arranged on the first rotating shaft 22.

In addition, as shown in fig. 2, a mounting bracket 24 is fixedly arranged on the mounting base 1, a second rotating shaft 25 is rotatably connected to the mounting bracket 24, and an upper feeding wheel 26 is fixedly arranged on the second rotating shaft 25; the upper feeding wheel 26 and the lower feeding wheel 23 are mutually abutted, the upper feeding wheel 26 and the lower feeding wheel 23 are driven wheels, and the welding wires drive the upper feeding wheel 26 and the lower feeding wheel 23 to rotate; the metering unit 3 is arranged on one side of the material conveying unit 2.

Through placing the welding wire between last feeding wheel 26 and lower feeding wheel 23, and do not have relative slip between welding wire and last feeding wheel 26 and the lower feeding wheel 23, when the surfacing machine tool used the welding wire, the welding wire motion drove and goes up feeding wheel 26 and lower feeding wheel 23 and rotate, because of the setting of measurement unit 3 is in defeated material unit 2 one side, and then measures the welding wire.

Because the surfacing machine tool needs to be driven by electric power in the using process, in order to avoid short circuit accidents, the upper feeding wheel 26 and the lower feeding wheel 23 are both made of insulating materials, and can be made of rubber wheels, bakelite wheels and the like. The plastic product formed by pressing the bakelite powder or bakelite powder has excellent insulativity and higher surface static friction coefficient, and can effectively prevent the welding wire from sliding relative to the upper feeding wheel 26 and the lower feeding wheel 23.

In addition, as shown in fig. 2, grooves 27 for compressing the welding wire are formed in the outer peripheral surfaces of the upper feeding wheel 26 and the lower feeding wheel 23, and the grooves 27 are formed in the outer peripheral surfaces of the upper feeding wheel 26 and the lower feeding wheel 23, so that the contact area between the welding wire and the upper feeding wheel 26 and between the welding wire and the lower feeding wheel 23 is effectively increased, the friction force between the welding wire and the material conveying unit 2 is further increased, the welding wire is prevented from sliding relative to the upper feeding wheel 26 and the lower feeding wheel 23, and the metering accuracy of the metering unit 3 is ensured.

As shown in fig. 2 and 3, the mounting bracket 24 includes a support rod 241 fixedly arranged on the mounting base 1, one end of the support rod 241 far away from the mounting base 1 is provided with a pivot assembly 242, the support rod 241 is pivotally connected with a mounting rod 243 through the pivot assembly 242, and the second support plate 21 is mounted on the mounting rod 243; the support rod 241 and the mounting rod 243 are both rectangular; because bracing piece 241 and installation pole 243 pivotal connection, and second backup pad 21 installs on installation pole 243, the accessible uses installation pole 243 and bracing piece 241 pivotal connection department as the axis rotation installation pole 243, and then adjusts the interval between upper feeding wheel 26 and the lower feeding wheel 23, is convenient for install the welding wire and is applicable to the welding wire of different specifications, and upper feeding wheel 26 exerts pressure to the welding wire under self action of gravity, prevents that the welding wire from sliding.

As shown in fig. 2 and 3, the pivoting assembly 242 includes a mounting plate 2421 fixed to one end of the mounting bar 243 near the supporting bar 241, the mounting plate 2421 is configured as a rectangular plate perpendicular to the end surface of the mounting bar 243, and one widthwise side of the mounting plate 2421 is fixed to the mounting bar 243; one end of the support rod 241, which is far away from the mounting base 1, is provided with two baffles 2422, the two baffles 2422 are arranged in a rectangular plate shape perpendicular to the end surface of the support rod 241, the two baffles 2422 are parallel and distributed at intervals, the mounting plate 2421 is located between the two baffles 2422, a pivot shaft 2423 is rotatably connected between the two baffles 2422, and the pivot shaft 2423 penetrates through the mounting plate 2421.

In order to ensure that the upper feeding wheel 26 has enough pressure on the welding wire and enough friction force between the upper feeding wheel 26 and the welding wire to prevent the welding wire from sliding relative to the upper feeding wheel 26 and the lower feeding wheel 23, a weight 244 is provided on the mounting rod 243.

As shown in fig. 2 and 3, in the present embodiment, the weight member 244 is a weight ring, the weight ring is sleeved on the mounting rod 243, and the weight ring can slide along the length direction of the mounting rod 243, so that the position of the weight member 244 on the mounting rod 243 can be adjusted by sliding the weight member 244, and the pressure of the upper feeding wheel 26 on the welding wire can be adjusted, and the mounting rod 243 is provided with a limiting component 245 for limiting the position of the weight member 244.

As shown in fig. 2 and 3, the position-limiting assembly 245 includes two position-limiting rods 2451 and a plurality of position-limiting holes 2452 formed on the side surface of the installation rod 243 where the length is square, the position-limiting rods 2451 are all arranged in a cylinder shape, the cross section of each position-limiting hole 2452 is arranged in a circular shape, the position-limiting holes 2452 are distributed at equal intervals along the length direction of the installation rod 243, and both the two position-limiting rods 2451 can penetrate through the position-limiting holes 2452.

After the counterweight 244 moves to a preset position, the two limiting rods 2451 can be respectively arranged in the limiting holes 2452 on the two sides of the counterweight 244 in a penetrating manner, so that the position of the counterweight 244 is fixed, the pressure of the upper feeding wheel 26 on the welding wire is prevented from changing due to the change of the position of the counterweight 244, and the stability of the welding wire driving the upper feeding wheel 26 and the lower feeding wheel 23 to move is further ensured.

As shown in fig. 2, the metering unit 3 includes a meter counter 31 mounted on the top surface of the mounting base 1, in this embodiment, the meter counter 31 is of an intelligent counter HB961 type, which has the characteristics of memory function, capability of displaying the last numerical value after power cut and power supply, and high resolution, and can be accurate to 0.01; a fixing plate 32 is fixedly arranged on the mounting base 1, the fixing plate 32 is arranged in a rectangular plate shape perpendicular to the mounting base 1, the fixing plate 32 is positioned on one side of the lower feeding wheel 23 far away from the support plate 21, and the fixing plate 32 is parallel to the lower feeding wheel 23; an inductor 33 is fixedly arranged on the fixing plate 32, a data line 34 is arranged between the inductor 33 and the meter counter 31, and the inductor 33 is connected with the meter counter 31 through the data line 34; a plurality of induction pieces 35 which can be induced by the inductor 33 are uniformly distributed at the same diameter position of the lower feeding wheel 23 at intervals, and the induction pieces 35 adopt hexagon bolts in the embodiment.

The welding wire drives down feed wheel 23 and rotates during the motion, and then drives a plurality of response 35 motion, and inductor 33 passes through the number of times that response 35 passed through, and then obtains feed wheel 23 pivoted number of turns down to with data transmission to meter rice ware 31 in, calculate by meter rice ware 31, below feed wheel 23 pivoted number of turns and lower feed wheel 23 week multiply, obtain the welding wire and consume the meter number.

In the automatic metering device for the welding wire of the surfacing machine tool, when the automatic metering device is used, the welding wire is firstly lapped on the lower feeding wheel 23, one end of the welding wire is connected with the surfacing machine tool, then the mounting rod 243 is enabled to rotate by taking the pivot joint as an axis until the upper feeding wheel 26 is butted on the welding wire, the pressure of the upper feeding wheel 26 on the welding wire can be adjusted by adjusting the position of the load piece, after the adjustment is completed, the automatic metering device starts to be used, when the surfacing machine tool uses the welding wire, the welding wire moves to drive the lower feeding wheel 23 to move, the movement of the lower feeding wheel 23 is detected by the meter counting unit, the meter counting device 31 is used for calculating and obtaining the consumed meter number of the welding wire, the reliable basis is provided for the management, cost accounting and cost control work of lean production, meanwhile, the intelligent counting device is used for the consumed welding wire, the manual weighing counting before is replaced, and the automatic counting of the device is completed, The intelligent transformation important work further effectively improves the convenience of measuring the consumption of the welding wires.

Example two

The embodiment of the application relates to a surfacing machine tool, as shown in fig. 1 and 2, a tool body of the surfacing machine tool is provided with an installation sinking groove 4 for installing an installation base 1, the cross section of the installation sinking groove 4 is rectangular, and clamping units 5 for clamping the installation base 1 are arranged on two sides of the installation sinking groove 4 in the length direction.

As shown in fig. 1 and fig. 2, the clamping unit 5 includes a bearing plate 51, the bearing plate 51 is a rectangular plate perpendicular to the bed, a side edge of the bearing plate 51 in the length direction is fixedly disposed on the bed, and the bearing plate 51 is parallel to an inner side wall of the mounting sink 4 in the length direction; one side of the bearing plate 51 close to the installation sink 4 is provided with limiting pieces 52 at intervals; the limiting member 52 comprises a movable plate 521, the movable plate 521 is a rectangular plate parallel to the supporting plate 51, a plurality of clamping blocks 522 are fixedly arranged on the side of the movable plate 521 away from the supporting plate 51, and the clamping blocks 522 are distributed at intervals along the length direction of the movable plate 521; the joint block 522 all is the setting of cuboid, and all is provided with chamfer 5221 on the side of joint block 522 keeping away from the lathe bed, so the transversal right angled triangle that personally submits of joint block 522 sets up, and two right-angle sides laminate fly leaf 521 and lathe bed respectively.

In addition, as shown in fig. 1 and fig. 2, two guide rods 53 are disposed between the movable plate 521 and the supporting plate 51, the two guide rods 53 are distributed at intervals and are both disposed in a cylinder perpendicular to the supporting plate 51, one end of each of the two guide rods 53 away from the supporting plate 51 penetrates through the movable plate 521, the movable plate 521 can slide along the length direction of the guide rod 53, and an elastic member 54 is disposed on each of the two guide rods 53, in this embodiment, the elastic member 54 is a spring, the spring is sleeved on the guide rod 53, two ends of the spring are respectively fixed on the movable plate 521 and the supporting plate 51, and the spring is always in a compressed state.

In order to prevent the moving plate from coming off the guide rod 53 under the action of the spring force, a limiting plate 523 is disposed at one end of the guide rod 53 away from the bearing plate 51, and the limiting plate 523 effectively limits the moving range of the moving plate 521 on the guide rod 53 to prevent the moving plate from coming off the guide rod 53.

When the automatic metering device is installed on a surfacing machine tool, a worker can firstly place the automatic metering device right above the installation sinking groove 4, the side edges of the two length directions of the bottom surface of the installation base 1 are respectively abutted to the inclined plane 5221 of the corresponding clamping block 522, then the automatic metering device moves downwards, the two movable plates 521 are both subjected to horizontal component force far away from the installation sinking groove 4, and therefore move towards the direction far away from the installation sinking groove 4 until the installation base 1 is installed in the installation sinking groove 4, at the moment, one end, far away from the movable plate 521, of the clamping block 522 is separated from the installation base 1, and therefore move towards the direction far away from the bearing plate 51 under the action of the elastic force of the spring, the installation base 1 is clamped, the operation is convenient, and the convenience for installing and disassembling the automatic metering device is effectively improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a build-up welding lathe welding wire automatic metering device for the length of the welding wire of measurement conveying, a serial communication port, automatic metering device is in including installation base (1), setting defeated material unit (2) and metering unit (3) on installation base (1), wherein:

the mounting base (1) is provided with a mounting bracket (24);

the material conveying unit (2) comprises an upper feeding wheel (26) which is rotatably connected to the mounting bracket (24) and a lower feeding wheel (23) which is rotatably connected to the mounting base (1); the upper feeding wheel (26) and the lower feeding wheel (23) are mutually abutted, and the upper feeding wheel (26) and the lower feeding wheel (23) can be driven by the welding wire to rotate;

the metering unit (3) is arranged on one side of the material conveying unit (2) and is used for detecting the number of rotation turns of the lower feeding wheel (23).

2. The automatic metering device of the surfacing machine welding wire according to claim 1, characterized in that: the upper feeding wheel (26) and the lower feeding wheel (23) are both made of insulating materials.

3. The automatic metering device of the surfacing machine welding wire according to claim 1, characterized in that: the peripheral surfaces of the upper feeding wheel (26) and the lower feeding wheel (23) are provided with grooves (27) for accommodating welding wires.

4. The automatic metering device of the surfacing machine welding wire according to claim 1, characterized in that: the mounting bracket (24) comprises a support rod (241) fixedly arranged on the mounting base (1), one end, far away from the mounting base (1), of the support rod (241) is pivotally connected with a mounting rod (243), and the upper feeding wheel (26) is rotatably connected to the mounting rod (243).

5. The automatic metering device of the surfacing machine welding wire according to claim 4, characterized in that: and a counterweight (244) is arranged on the mounting rod (243).

6. The automatic metering device of the surfacing machine welding wire according to claim 5, characterized in that: the weight member (244) includes a weight ring fitted over the mounting rod (243), the weight ring being manipulated to be slidable on the mounting rod (243).

7. The automatic metering device of the surfacing machine welding wire according to claim 6, characterized in that: and a limiting component (245) used for limiting the position of the counterweight part (244) is arranged on the mounting rod (243).

8. The automatic metering device of the surfacing machine welding wire according to claim 7, characterized in that: the limiting assembly (245) comprises a plurality of limiting rods (2451) and a plurality of limiting holes (2452) formed in the mounting rod (243), and the limiting rods (2451) can penetrate through the limiting holes (2452).

9. The utility model provides a build-up welding lathe, includes the lathe bed, its characterized in that: the automatic metering device for the welding wire of the surfacing machine tool according to any one of claims 1-8 is arranged on the machine body.

10. The build-up welding machine tool according to claim 9, characterized in that: be equipped with on the lathe bed and be used for holding installation heavy groove (4) of installation base (1), the week side of installation heavy groove (4) is equipped with and is used for the joint unit (5) of installation base (1), and it includes elastic component (54), and by locating part (52) that elastic component (54) pushed up, elastic component (54) can be because of installation base (1) supports the pressure locating part (52) and the energy storage, elastic component (54) can be because of the energy release by locating part (52) prevent installation base (1) certainly deviate from in the installation heavy groove (4).