CN217859324U

CN217859324U - Isolated motion

Info

Publication number: CN217859324U
Application number: CN202220757885.XU
Authority: CN
Inventors: 王玉林; 王甜怡
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-11-22
Anticipated expiration: 2032-04-01

Abstract

The utility model discloses an isolated motion, including aluminium crossbeam and lathe bed, aluminium crossbeam both ends bottom install the steel bottom plate, the aluminium crossbeam pass through the steel bottom plate and install on the lathe bed, the steel bottom plate on be equipped with the connection face that is used for connecting the aluminium crossbeam, aluminium crossbeam top surface be used for installing leading rail and rack department and be equipped with installation face one, installation face one pass through bolt installation fixed belted steel one, belted steel one on install leading rail and rack, the aluminium crossbeam when needing the concatenation, the side is used for installing auxiliary guide rail department and is equipped with installation face two, installation face two department pass through bolt installation fixed belted steel two, belted steel two on install auxiliary guide rail. Compared with the prior art, the utility model the advantage lie in: the adverse effect of the aluminum product on the cutting precision caused by the fact that the linear expansion coefficient of the aluminum product is far larger than that of steel is avoided, and the advantage of light weight of the aluminum beam is fully played.

Description

Isolated motion

Technical Field

The utility model relates to a laser cutting machine technical field specifically indicates an isolated motion.

Background

The main structure of the laser cutting machine generally adopts a carbon steel welding lathe bed and a cast aluminum or aluminum profile welding beam. The carbon steel welding lathe bed well meets the requirements of rigidity and stability of the laser cutting machine; the aluminum beam has light weight and small inertia, and can well meet the requirements of high-speed cutting and quick steering. Therefore, the carbon steel welding bed body and the aluminum beam form the standard configuration of the laser cutting machine. However, the main structure of the steel and aluminum combination is not only advantageous, but also has obvious defects, and if the main structure is not properly processed, the cutting precision and the operation stability of the laser cutting machine are affected very adversely.

It is well known that almost all material dimensions change with temperature, i.e. expansion and contraction, and that steel and aluminium products are no exception naturally. The linear expansion coefficients of the steel and aluminum products changing along with the temperature have larger difference, and the reference can be found out: the linear expansion coefficient of the steel material is about 11 multiplied by 10 < -6 >/DEG C, and the linear expansion coefficient of the aluminum material is about 23 multiplied by 10 < -6 >/DEG C, which is close to twice of the linear expansion coefficient of the steel. The linear size expansion and contraction quantity of the steel product along with the temperature change is abbreviated as: 1 degree 1 silk 1 meter, the flexible volume of aluminium product then is: 1 meter 1 degree 2 silk. The relative expansion and contraction of the steel and aluminum products is about 1 meter and 1 degree and 1 wire. That is to say in same temperature variation range, the flexible volume of aluminium product is the twice of steel product, and when ambient temperature changed, steel, aluminium fitting piece can produce relative displacement because of actual flexible volume difference, and the displacement appears and can produce adverse effect to work precision and security in the key position.

The beam is the main moving part of the cutting machine. The main body of the beam is made of aluminum alloy, and the guide rail and the rack arranged on the beam are made of steel. The length of the beam is usually more than 2 meters, the guide rail is slightly shorter than the beam, the racks are spliced, and the standard length of each common rack is 1 meter. As mentioned above, the expansion and contraction rates of steel and aluminum products are obviously different when the temperature is changed. The day and night temperature difference is above 10 ℃, the relative stretching amount generated by the guide rail and the cross beam on the whole length range of the cross beam reaches 20 threads, and the relative stretching amount generated by each rack also has 10 threads. In the early stage, because the guide rail and the rack are tightly fastened on the cross beam by bolts, the relative expansion amount does not completely generate actual relative displacement, and only alternating stress exists. However, the fastening bolt is repeatedly subjected to interaction forces in two directions due to the alternation of day and night for a long time, so that the bolt is inevitably loosened, and finally the guide rail and the rack are displaced, thereby bringing adverse effects to the operation precision. After the rack fastening bolt is loosened, the relative expansion amount of the rack can be intensively reflected at the butt joint of the rack, the day and night temperature difference can cause the variation of more than 10 threads of the rack butt joint gap, and the extreme temperature difference of cold and hot is more than 40 ℃, so that the variation of the rack butt joint gap of more than 40 threads can be caused, which is enough to cause serious influence on the positioning precision and the operation stability of an X axis.

The beam is not only matched with the guide rail and the rack of the beam, but also matched with the linear guide rails and the racks arranged on two sides of the lathe bed to complete Y-axis movement through the driving motor. When the ambient temperature changes, the aluminum beam and the welding lathe bed have the same expansion difference, the span size is larger, and the relative expansion amount caused by the temperature change is also larger. The relative expansion and contraction caused by the temperature difference between day and night can cause loosening of fastening bolts at the relevant parts and deviation of fixing positions of fixing parts; extreme temperature differences in chills and hot temperatures can cause shifts in the fixed position of the limit. The span of the Y-axis driving motors at two ends of the beam is generally more than 2 meters, the generated limit relative expansion amount can reach more than 80 wires, 40 wires of displacement can be generated when the Y-axis driving motors are equally divided to the ends (almost impossible to equally divide in practical situations), the Y-axis positioning precision can be seriously reduced corresponding to 40 wires of gear/rack meshing gaps, impact is generated when the Y-axis is reversed at high speed due to the fact that the Y-axis driving motors exceed 40 wires of meshing gaps, and the service life of the gear and the rack is seriously shortened.

Therefore, the relative expansion and contraction caused by frequent day and night temperature difference can cause the fastening bolt at the joint of the steel and the aluminum to gradually loosen; the temperature difference along with seasonal variation can cause obvious relative displacement of steel and aluminum matching pieces, and when the displacement is accumulated to a certain degree, the displacement is enough to bring non-negligible influence on the working precision of equipment, and even has potential safety hazard.

In general, the adverse effect of the difference in linear expansion coefficients of steel and aluminum on the accuracy of the laser cutting machine is gradually increased, because the ambient temperature is also changed slowly with the change of seasons. However, when the difference between the production place of the device and the latitude degree of the user is large and the difference between the climate temperature is large, the relative expansion and contraction amount caused by the temperature difference between the device and the user in the field environment can bring a remarkable influence on the cutting precision and even influence the normal operation of the device. In addition, the longer the beam is made, which is equivalent to enlarging the relative expansion and contraction amount, the greater the adverse effect on the precision.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming above technical defect, providing an isolated motion, avoiding aluminium goods linear expansion coefficient to be greater than the adverse effect that steel brought for cutting accuracy, full play aluminium system crossbeam light in weight's advantage simultaneously.

In order to solve the technical problem, the utility model provides a technical scheme does: the utility model provides an isolated motion, includes aluminium crossbeam and lathe bed, aluminium crossbeam both ends bottom install the steel bottom plate, the aluminium crossbeam pass through the steel bottom plate and install on the lathe bed, the steel bottom plate on be equipped with the connection face that is used for connecting the aluminium crossbeam, aluminium crossbeam top surface be used for installing leading rail and rack department and be equipped with installation face one, installation face one locate through bolt installation fixed belted steel one, belted steel one on install leading rail and rack, the aluminium crossbeam when needing the concatenation, the side is used for installation auxiliary guide rail department to be equipped with installation face two, installation face two locate through bolt installation fixed belted steel two, belted steel two on install auxiliary guide rail.

Furthermore, the first mounting surface and the second mounting surface on the aluminum cross beam are shallow grooves with the depth of 3mm, and the shallow grooves are matched with the widths of the first strip steel and the second strip steel in a clearance fit mode.

Furthermore, the roughness of the matching surface of the aluminum cross beam and the first strip steel and the second strip steel is not less than 3.2, so that the installation precision is ensured, and the transverse displacement in operation is reduced.

Furthermore, the connecting surface of the steel bottom plate and the aluminum cross beam is set to be a shallow groove, and the width of the shallow groove is matched with the aluminum cross beam in a clearance fit mode.

Furthermore, the roughness of the connecting surface of the aluminum beam and the steel bottom plate is not less than 3.2, the steel bottom plate is firstly installed on the slide blocks of the guide rails on the two sides of the lathe bed, and the aluminum beam is then placed on the installing surface of the steel bottom plate and fastened by bolts.

Furthermore, the main guide rail is a guide rail close to the rack, and the main guide rail and the rack are made of the same strip steel, namely the main guide rail and the rack are respectively processed on the same strip steel, so that the relative position of the main guide rail and the rack can be prevented from changing, and the cutting precision can be kept.

Compared with the prior art, the utility model the advantage lie in: the utility model discloses keep apart because the different environmental temperature of two kinds of materials linear expansion coefficient of aluminum products and steel produced relative flexible volume when changing through an additional structure and laser cutting machine key component, like this when the temperature changes, though still there is the volume of stretching out and drawing back relatively, nevertheless can not produce adverse effect to cutting accuracy and security, avoids aluminum products linear expansion coefficient to be greater than the adverse effect that steel brought for cutting accuracy, full play aluminium system crossbeam light in weight's advantage simultaneously.

Drawings

Fig. 1 is a schematic structural view of an aluminum beam according to the present invention.

Fig. 2 is a schematic structural diagram of the bed body of the present invention.

As shown in the figure: 1. the device comprises an aluminum beam, 2, a lathe bed, 3, a steel bottom plate, 4, first mounting surfaces, 5, second mounting surfaces, 6 and guide rails.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-2, an isolated motion, including aluminium crossbeam 1 and lathe bed 2, 1 both ends bottom of aluminium crossbeam install steel bottom plate 3, aluminium crossbeam 1 install on lathe bed 2 through steel bottom plate 3, steel bottom plate 3 on be equipped with the connection face that is used for connecting aluminium crossbeam 1, 1 top surface of aluminium crossbeam be used for installing leading rail and rack department and be equipped with installation face one 4, installation face one 4 department through bolt installation fixed belted steel one, belted steel one on install leading rail and rack, aluminium crossbeam 1 when needing the concatenation, the side is used for installation auxiliary guide rail department to be equipped with installation face two 5, installation face two 5 department through bolt installation fixed belted steel two, belted steel two on install auxiliary guide rail.

In this embodiment, the first mounting surface 4 and the second mounting surface 5 on the aluminum cross beam 1 are shallow grooves with a depth of 3mm, and the shallow grooves are matched with the widths of the first strip steel and the second strip steel in a clearance fit manner.

In the embodiment, the roughness of the matching surface of the aluminum beam 1 and the first strip steel and the second strip steel is not less than 3.2, so that the installation precision is ensured, and the transverse displacement in the operation process is reduced.

In this embodiment, the connection surface between the steel bottom plate 3 and the aluminum cross beam 1 is formed as a shallow groove, and the width of the shallow groove is in clearance fit with the aluminum cross beam 1.

In this embodiment, the roughness of the connection surface between the aluminum beam 1 and the steel bottom plate 3 is not less than 3.2, the steel bottom plate 3 is firstly installed on the sliding blocks of the guide rails 6 on the two sides of the bed body 2, and the aluminum beam 1 is then placed on the installation surface of the steel bottom plate 3 and fastened by bolts.

When the utility model is implemented specifically, the original mode of directly processing the guide rail and the rack mounting surface on the aluminum beam is changed into the mode of adding the strip steel on the main guide rail, the rack mounting surface and the auxiliary guide rail mounting surface, corresponding mounting surfaces are processed on the strip steel, the strip steel is fastened on the correspondingly processed strip steel mounting surface of the aluminum beam by a group of bolts, and the main guide rail and the rack mounting surface are respectively processed on the strip steel; the concrete requirements are as follows: the mounting surface on the aluminum cross beam is processed into a shallow groove with the depth of about 3mm, the width is determined according to actual needs and is matched with the width of the strip steel, clearance fit is adopted in the matching, the tolerance is not lower than H8/H8, the matching surface of the aluminum cross beam and the strip steel is subjected to finish machining, the roughness is not less than 3.2, the mounting precision is ensured, and the transverse displacement in operation is reduced;

the main guide rail and the rack on the strip steel are fastened on the aluminum cross beam by bolts and then are processed so as to ensure the overall assembly precision, and in order to reduce the processing deformation and the processing stress, the strip steel is roughly processed before being installed and enough finishing allowance is reserved;

the auxiliary guide rail has small influence on the processing precision, when the aluminum cross beam is short in length and does not need to be spliced with the guide rail, strip steel can be omitted, the original structure is kept, when the aluminum cross beam is long and the guide rail needs to be spliced, the strip steel structure needs to be increased, otherwise, the relative telescopic amount can cause the increase of a gap at the butt joint part, and the operation stability and the service life of the guide rail are reduced.

Removing the bottom plates at the two ends of the aluminum cross beam and integrating the aluminum cross beam, manufacturing a steel bottom plate, keeping all functions of the original aluminum bottom plate, designing corresponding connecting surfaces on the aluminum cross beam and the steel bottom plate respectively, and connecting and fastening by using bolts; the concrete requirements are as follows: the connecting surface of the steel bottom plate and the aluminum cross beam is designed into a shallow groove, the width of the shallow groove is matched with that of the aluminum cross beam, clearance fit is adopted, the matching tolerance is not lower than H8/H8, and the aluminum cross beam is prevented from shifting back and forth on the steel bottom plate in the operation process;

the connecting surface of the aluminum beam and the steel bottom plate is subjected to finish machining, the roughness is not less than 3.2, and the geometric tolerance requirement required by assembly is ensured;

the steel bottom plate is used as an independent part, the required precision is achieved by machining, the steel bottom plate does not need to be connected with the aluminum cross beam and then machined, the steel bottom plate is firstly assembled on the guide rail sliding block of the lathe bed during equipment assembly, and the aluminum cross beam is then assembled on the steel bottom plate and fastened by bolts.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, it should be understood that those skilled in the art should also understand the scope of the present invention without inventively designing the similar structure and embodiments of the present invention without departing from the spirit of the present invention.

Claims

1. An isolated motion mechanism, characterized in that: including aluminium crossbeam (1) and lathe bed (2), aluminium crossbeam (1) both ends bottom install steel bottom plate (3), aluminium crossbeam (1) install on lathe bed (2) through steel bottom plate (3), steel bottom plate (3) on be equipped with the connection face that is used for connecting aluminium crossbeam (1), aluminium crossbeam (1) top surface be used for installing leading rail and rack department and be equipped with installation face (4), installation face (4) locate through bolt installation fixed belted steel one, belted steel one on install leading rail and rack, aluminium crossbeam (1) when needing the concatenation, the side is used for installation auxiliary guide rail department to be equipped with installation face two (5), installation face two (5) locate through bolt installation fixed belted steel two, belted steel two on install auxiliary guide rail.

2. An isolated motion mechanism according to claim 1, wherein: the first mounting surface (4) and the second mounting surface (5) on the aluminum cross beam (1) are shallow grooves with the depth of 3mm, and the shallow grooves are matched with the widths of the first strip steel and the second strip steel in a clearance fit mode.

3. An isolated motion mechanism according to claim 2, wherein: the roughness of the matching surface of the aluminum beam (1) and the first strip steel and the second strip steel is not less than 3.2, so that the installation precision is ensured, and the transverse displacement in the operation process is reduced.

4. An isolated motion mechanism according to claim 1, wherein: the connection surface of the steel bottom plate (3) and the aluminum cross beam (1) is set to be a shallow groove, and the width of the shallow groove is matched with the aluminum cross beam (1) in a clearance fit mode.

5. An isolated motion mechanism according to claim 4, wherein: the aluminum beam (1) and the steel bottom plate (3) are connected with each other, the roughness of the connection surface is not less than 3.2, the steel bottom plate (3) is firstly installed on the sliding blocks of the guide rails (6) on the two sides of the lathe bed (2), and the aluminum beam (1) is then placed on the installation surface of the steel bottom plate (3) and is fastened by bolts.