A device for preventing thermal expansion stress change in precision machining

Abstract

The application relates to the technical field of precision machinery, and discloses a heat-expansion-stress-change-preventing device for precision machining, which comprises a workbench, a workpiece and a machining head, the workpiece is placed at the bottom of the workbench, the machining head is fixedly connected to the top of the workbench, one side of the machining head close to the workpiece is provided with a detection assembly for detecting the temperature of the workpiece, and the top of the detection assembly is provided with a cooling assembly for cooling the workpiece; the temperature of the machining surface of the electric transmission wheel rod is controlled by the alarm controller to timely cool down, so that the heat expansion of the workpiece caused by the excessively high temperature of the machining surface during machining is avoided, the workpiece after heat expansion is prevented from being machined by the machining head, the deformation of the machining surface of the workpiece caused by the friction and polishing between the machining head and the workpiece is prevented, the workpiece after bending deformation is prevented from shaking due to the ineffective assembly with other devices, and the assembly degree and precision of the workpiece are improved.

Description

Technical Field

[0001] This invention relates to the field of precision machinery technology, specifically to a device for preventing thermal expansion stress changes in precision machining. Background Technology

[0002] Precision machinery refers to mechanical equipment or parts manufactured by precision machining. It is characterized by high precision, high stability and high reliability. Such machinery is often used in fields that require high precision control and high requirements, such as aerospace, medical devices, semiconductor manufacturing and optical instruments.

[0003] During the precision machining of parts, the grinding heads of the machining equipment generate high temperatures due to friction between them. When the temperature of the machined surface of the parts is too high, thermal expansion and deformation can easily occur. If the operator does not notice this in time and take appropriate measures, the grinding head will process the thermally expanded parts, causing the machined surface of the parts to bend and deform. At the same time, the continuous high temperature will damage the grinding head, which in turn will damage the parts. The bent and deformed parts will not be able to be effectively assembled with other devices, resulting in loosening and affecting the assembly degree of the parts.

[0004] To address this, a device for preventing thermal expansion stress changes in precision machining is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a device for preventing thermal expansion stress changes in precision machining, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for preventing thermal expansion stress changes in precision machining, comprising a worktable, a workpiece, and a machining head, wherein the workpiece is placed at the bottom of the worktable, the machining head is fixedly connected to the top of the worktable, a detection component for detecting the temperature of the workpiece is provided on the side of the machining head near the workpiece, and a cooling component for cooling the workpiece is provided on the top of the detection component.

[0007] Preferably, the detection component includes an alarm controller, which is fixedly connected to the bottom of the processing head. A conductive wire is fixedly connected to the top of the alarm controller. A temperature sensor is fixedly connected to the end of the conductive wire away from the alarm controller. A rubber ring is fixedly connected to the top of the temperature sensor. A thermally conductive hemisphere is fixedly connected to the top of the rubber ring. A fixing block is fixedly connected to the lower surface of the thermally conductive hemisphere. A first metal sheet is fixedly connected to the side wall of the fixing block. A second metal sheet is fixedly connected to the side surface of the fixing block away from the first metal sheet. A thermally conductive rod is fixedly connected to the top of the thermally conductive hemisphere.

[0008] Preferably, the cooling component includes a heat-conducting cavity, which is fixedly connected to the side wall of the processing head and sleeved with the end of the processing head near the workpiece. A fixing plate is fixedly connected to the top of the heat-conducting cavity, and an electric drive wheel is rotatably connected to the side of the heat-conducting cavity near the fixing plate. A conveyor belt is driven to the end of the electric drive wheel away from the heat-conducting cavity, and a second drive wheel is driven to the top of the conveyor belt away from the electric drive wheel.

[0009] Preferably, the cooling assembly further includes a fan blade rod, which is fixedly connected to the side wall of the second transmission wheel near the fixed plate, and the fan blade rod is rotatably connected to the top of the fixed plate. A cooling groove plate is fixedly connected to the side of the fixed plate away from the heat conduction cavity. A cooling pipe is fixedly connected to the interior of the cooling groove plate away from the fixed plate. A cooling groove plate is fixedly connected to the side wall of the cooling groove plate away from the fixed plate.

[0010] Preferably, the lower surface of the first metal sheet is attached to the second metal sheet, so that the heat-conducting hemisphere transfers heat to the interior of the first and second metal sheets.

[0011] Preferably, the first metal sheet is made of cadmium, which has a coefficient of thermal expansion of [value missing]. The second metal sheet is made of aluminum, and its coefficient of thermal expansion is [value missing]. Heat is transferred from the first metal sheet to the interior of the second metal sheet, and the second metal sheet undergoes thermal expansion and bending, thus coming into contact with the temperature sensor.

[0012] Preferably, the alarm controller's electrical control device is electrically connected to the electric drive wheel rod via a power source, enabling the alarm controller to electrically control the electric drive wheel rod through the power source.

[0013] Preferably, the cooling pipe is electrically connected to the power supply of the equipment, so that the operator can electrically control the operation of the cooling pipe through the power supply of the equipment.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The alarm controller controls the temperature of the electric drive wheel rod's machining surface to cool it down in time, avoiding thermal expansion of the workpiece when the machining surface temperature is too high during processing. This prevents deformation of the workpiece's machining surface caused by the machining head grinding against the workpiece after thermal expansion. It also prevents the workpiece from bending and deforming and becoming unable to be effectively assembled with other devices, thus improving the assembly degree and precision of the workpiece.

[0016] 2. The heat transferred from the workpiece to the second metal plate causes the alarm controller to issue an alarm to alert the operator, preventing the operator from failing to detect and take appropriate emergency measures when the workpiece surface temperature is too high. This avoids damage to the grinding part of the machining head caused by the continuous high temperature of the workpiece, and improves the service life of the machining head. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram showing the positional relationship between the workpiece and the alarm controller according to the present invention;

[0019] Figure 3 This is a schematic diagram showing the positional relationship between the alarm controller and the heat-conducting rod of the present invention;

[0020] Figure 4 This is a schematic diagram showing the positional relationship between the rubber ring and the second metal sheet of the present invention;

[0021] Figure 5 This is a schematic diagram showing the positional relationship between the processing head and the heat-conducting cavity of the present invention;

[0022] Figure 6 This is a schematic diagram showing the positional relationship between the heat-conducting cavity and the conveyor belt in this invention;

[0023] Figure 7 This is a schematic diagram showing the positional relationship between the fixing plate and the fan blade rod of the present invention;

[0024] Figure 8 This is a schematic diagram showing the positional relationship between the fixing plate and the cooling tank plate of the present invention;

[0025] Figure 9 This is a schematic diagram showing the positional relationship between the fan blade rod and the cooling pipe of the present invention.

[0026] In the picture:

[0027] 1. Worktable; 2. Workpiece; 3. Machining head;

[0028] The detection components include: 41, alarm controller; 42, conductive wire; 43, temperature sensor; 44, rubber ring; 45, heat-conducting hemisphere; 46, fixing block; 47, first metal sheet; 48, second metal sheet; 49, heat-conducting rod;

[0029] The cooling assembly includes: 51, heat-conducting cavity; 52, fixing plate; 53, electric drive wheel rod; 54, conveyor belt; 55, second drive wheel; 56, fan blade rod; 57, cooling trough plate; 58, cooling pipe; 59, cooling trough plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0031] Embodiments of the present invention

[0032] Please see Figures 1 to 9 The present invention provides a device for preventing thermal expansion stress changes in precision machining: including a worktable 1, a workpiece 2 and a machining head 3. The workpiece 2 is placed on the top of the worktable 1, and the machining head 3 is fixedly connected to the top of the worktable 1. A detection component for detecting the temperature of the workpiece 2 is provided on the side of the machining head 3 near the workpiece 2, and a cooling component for cooling the workpiece 2 is provided on the top of the detection component.

[0033] The detection assembly includes an alarm controller 41, which is fixedly connected to the bottom of the processing head 3. A conductive wire 42 is fixedly connected to the top of the alarm controller 41. A temperature sensor 43 is fixedly connected to the end of the conductive wire 42 away from the alarm controller 41. A rubber ring 44 is fixedly connected to the top of the temperature sensor 43. A heat-conducting hemisphere 45 is fixedly connected to the top of the rubber ring 44. A fixing block 46 is fixedly connected to the lower surface of the heat-conducting hemisphere 45. A first metal sheet 47 is fixedly connected to the side wall of the fixing block 46. A second metal sheet 48 is fixedly connected to the side surface of the fixing block 46 away from the first metal sheet 47. The lower surface of the first metal sheet 47 and the second metal sheet 48 are in contact, so that the heat-conducting hemisphere 45 transfers heat to the interior of the first metal sheet 47 and the second metal sheet 48 through the fixing block 46. The first metal sheet 47 is made of cadmium metal, and its coefficient of thermal expansion is [insert coefficient here]. The second metal sheet 48 is made of aluminum, and its coefficient of thermal expansion is... Heat is transferred from the first metal sheet 47 to the interior of the second metal sheet 48, and the second metal sheet 48 undergoes thermal expansion and bending to come into contact with the temperature sensor 43. A heat-conducting rod 49 is fixedly connected to the top of the heat-conducting hemisphere 45.

[0034] Reference Figure 4 Additionally, both the temperature sensor 43 and the heat-conducting hemisphere 45 are hemispherical in shape. The heat inside the heat-conducting hemisphere 45 is transferred to the interior of the temperature sensor 43 through the first metal sheet 47 and the second metal sheet 48 by the thermal expansion and bending of the second metal sheet 48.

[0035] The cooling assembly includes a heat-conducting cavity 51, which is fixedly connected to the side wall of the processing head 3. The heat-conducting cavity 51 is sleeved with the end of the processing head 3 near the workpiece 2. A fixing plate 52 is fixedly connected to the top of the heat-conducting cavity 51. An electric drive wheel rod 53 is rotatably connected to the side of the heat-conducting cavity 51 near the fixing plate 52. An alarm controller 41 is electrically connected to the power supply of the device and the electric drive wheel rod 53, so that the alarm controller 41 can electrically control the electric drive wheel rod 53 to work through the power supply of the device. A conveyor belt 54 is driven to the end of the electric drive wheel rod 53 away from the heat-conducting cavity 51. A second drive wheel 55 is driven to the top of the conveyor belt 54 away from the electric drive wheel rod 53.

[0036] Reference Figure 6 In addition, the size of the end of the electric drive wheel 53 away from the heat conduction cavity 51 is adapted to the size of the second drive wheel 55, so that the electric drive wheel 53 drives the second drive wheel 55 to rotate synchronously through the conveyor belt 54.

[0037] The cooling assembly also includes a fan blade rod 56, which is fixedly connected to the side wall of the second transmission wheel 55 near the fixed plate 52 and rotatably connected to the top of the fixed plate 52. A cooling trough plate 57 is fixedly connected to the side of the fixed plate 52 away from the heat conduction cavity 51. A cooling pipe 58 is fixedly connected to the inside of the cooling trough plate 57 away from the fixed plate 52. The cooling pipe 58 is electrically connected to the power supply of the equipment, so that the operator can electrically control the operation of the cooling pipe 58 through the power supply of the equipment. A cooling trough plate 59 is fixedly connected to the side wall of the cooling trough plate 57 away from the fixed plate 52.

[0038] Reference Figures 7 to 9 Additionally, the cooling pipes 58 are arrayed inside the cooling trough plate 57, so that the airflow generated by the rotation of the fan blade rod 56 is cooled by the cooling pipes 58.

[0039] The following describes the working process and principle of the above embodiments:

[0040] The initial state is as follows: the operator has placed the workpiece 2 at the bottom of the workbench 1, the first metal plate 47 and the second metal plate 48 have not expanded, and the fan blade rod 56 and the electric drive wheel rod 53 have not rotated.

[0041] The working steps are as follows: Since workpiece 2 is not prone to thermal expansion and contraction in an environment ranging from 20 to 25 degrees Celsius, when the processing head 3 processes workpiece 2, the temperature of the processed surface of workpiece 2 exceeds 25 degrees Celsius due to the prolonged grinding by the processing head 3. When the temperature of the processed surface of workpiece 2 is too high, the internal temperature of workpiece 2 is transferred to the interior of the heat-conducting cavity 51 through the processing head 3. Subsequently, the heat inside the heat-conducting cavity 51 is transferred to the interior of the heat-conducting hemisphere 45 through the heat-conducting rod 49, causing the heat-conducting hemisphere 45 to transfer heat to the interior of the first metal sheet 47 and the second metal sheet 48. Since the coefficient of thermal expansion of the first metal sheet 47 is... The coefficient of thermal expansion of the second metal sheet 48 is Two metal sheets are usually fixed at one end. When the temperature changes, the side with the lower coefficient of thermal expansion bends to one side first. Then, the bending deformation is converted into mechanical displacement through a mechanical transmission device. As a result, the second metal sheet 48 undergoes thermal expansion and bends towards the side closer to the temperature sensor 43, causing the second metal sheet 48 to come into contact with the temperature sensor 43. This allows the heat inside the second metal sheet 48 to be transferred to the inside of the temperature sensor 43. The temperature sensor 43 generates an electrical signal and issues an alarm based on the received heat. The electrical signal enters the alarm controller 41 through the conductive wire 42. At this time, the alarm controller 41 uses the power supply of the equipment to electrically control the electric transmission wheel 53 to start rotating. The heat transferred from the workpiece 2 to the inside of the second metal sheet 48 causes the alarm controller 41 to issue an alarm to alert the operator. This prevents the operator from being unable to detect and take appropriate emergency measures when the temperature of the workpiece 2's processing surface is too high. In severe cases, the continuous high temperature of the workpiece 2 may damage the grinding part of the processing head 3, thus improving the service life of the processing head 3.

[0042] When the alarm controller 41 issues an alarm, the electrical control device powers the electric drive wheel 53, causing it to rotate. The electric drive wheel 53, through the transmission belt 54, drives the second drive wheel 55 to rotate synchronously. The second drive wheel 55 drives the fan blade rod 56 to rotate on the top of the fixed plate 52. When the fan blade rod 56 rotates, it compresses the air on the force surface in a diagonal manner, causing it to move in a direction perpendicular to the fan blade surface, thus forming an airflow. At this time, the operator uses the power supply to electrically control the cooling pipe 58 to start cooling, so that the airflow is cooled through the surface of the cooling pipe 58. The cooled airflow then enters the interior of the cooling tank plate 59 through the cooling pipe 58, and cools the machined surface of the workpiece 2 through the cooling tank plate 59.

[0043] When the temperature of the workpiece 2's machined surface drops to between 20 and 25 degrees Celsius, the heat transferred from the workpiece 2 to the heat-conducting hemisphere 45 via the processing head 3 decreases. At this point, the second metal sheet 48 no longer thermally expands and bends, and comes into contact with the temperature sensor 43. Simultaneously, the temperature sensor 43 cannot generate an electrical signal to transmit to the alarm controller 41, thus preventing the alarm controller 41 from electrically controlling the rotation of the electric drive wheel 53 via the power supply. Ultimately, the fan blade 56 cannot rotate to generate airflow through the cooling trough plate 59 to cool the machined surface of the workpiece 2. By controlling the temperature of the machined surface of the electric drive wheel 53 via the alarm controller 41, timely cooling is achieved, preventing thermal expansion of the workpiece 2 when the machined surface temperature is too high during processing. This also prevents deformation of the workpiece 2's machined surface caused by the contact between the processing head 3 and the workpiece 2 during processing after thermal expansion. Furthermore, it prevents the workpiece 2 from becoming bent and deformed, which would prevent it from being effectively assembled with other devices and causing wobbling. This improves the assembly accuracy and precision of the workpiece 2.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing thermal expansion stress changes in precision machining, comprising a worktable (1), a workpiece (2), and a machining head (3), wherein the workpiece (2) is placed on top of the worktable (1), and the machining head (3) is fixedly connected to the top of the worktable (1), characterized in that, The processing head (3) is provided with a detection component for detecting the temperature of the workpiece (2) on the side near the workpiece (2), and a cooling component for cooling the workpiece (2) is provided on the top of the detection component. The detection assembly includes an alarm controller (41), which is fixedly connected to the bottom of the processing head (3). A conductive wire (42) is fixedly connected to the top of the alarm controller (41). A temperature sensor (43) is fixedly connected to the end of the conductive wire (42) away from the alarm controller (41). A rubber ring (44) is fixedly connected to the top of the temperature sensor (43). A thermally conductive hemisphere (45) is fixedly connected to the top of the rubber ring (44). A fixing block (46) is fixedly connected to the lower surface of the thermally conductive hemisphere (45). A first metal sheet (47) is fixedly connected to the side wall of the fixing block (46). A second metal sheet (48) is fixedly connected to the side surface of the fixing block (46) away from the first metal sheet (47). A thermally conductive rod (49) is fixedly connected to the top of the thermally conductive hemisphere (45). The cooling assembly includes a heat-conducting cavity (51), which is fixedly connected to the side wall of the processing head (3). The heat-conducting cavity (51) is sleeved with the end of the processing head (3) near the workpiece (2). A fixing plate (52) is fixedly connected to the top of the heat-conducting cavity (51). An electric drive wheel rod (53) is rotatably connected to the side of the heat-conducting cavity (51) near the fixing plate (52). A conveyor belt (54) is driven to the end of the electric drive wheel rod (53) away from the heat-conducting cavity (51). A second drive wheel (55) is driven to the top of the conveyor belt (54) away from the electric drive wheel rod (53). The cooling assembly also includes a fan blade rod (56), which is fixedly connected to the side wall of the second transmission wheel (55) near the fixed plate (52) and is rotatably connected to the top of the fixed plate (52). A cooling groove plate (57) is fixedly connected to the side of the fixed plate (52) away from the heat conduction cavity (51). A cooling pipe (58) is fixedly connected inside the cooling groove plate (57) away from the fixed plate (52). A cooling groove plate (59) is fixedly connected to the side wall of the cooling groove plate (57) away from the fixed plate (52).

2. The device for preventing thermal expansion stress changes in precision machining according to claim 1, characterized in that: The lower surface of the first metal sheet (47) is attached to the second metal sheet (48).

3. The device for preventing thermal expansion stress changes in precision machining according to claim 1, characterized in that: The first metal sheet (47) is made of cadmium, and its coefficient of thermal expansion is _____. The second metal sheet (48) is made of aluminum, and its coefficient of thermal expansion is _____. .

4. The device for preventing thermal expansion stress changes in precision machining according to claim 1, characterized in that: The alarm controller (41) is an electrical control device that uses a power source and is electrically connected to the electric drive wheel rod (53).

5. The device for preventing thermal expansion stress changes in precision machining according to claim 1, characterized in that: The cooling pipe (58) is electrically connected to the power supply used by the equipment.

Images