阅读说明：本技术 一种主动恒压力控制砂带机 (Active constant-pressure control abrasive belt machine ) 是由 谷阳正 孟祥敦 谭彬彬 张伟 于 2021-02-26 设计创作，主要内容包括：一种属于砂带机技术领域的主动恒压力控制砂带机,包括底座、集尘料斗、驱动部件、立板、惰性轮C、张紧部件、手动阀、调偏部件、主动恒力浮动控制部件、砂带、惰性轮B、手动调压阀、精密调压阀、电气比例阀、三联件。本发明以压缩空气为介质通过气缸控制砂带机的接触轮前移或者后退,使接触轮能够补偿工件外形的偏差、工件和磨料的磨损,通过力传感器实时监测接触轮与工件的接触力的大小,并将此接触力值反馈给前端与设定力值比较,通过电气比例阀和精密调压阀和相应的算法有效调节气缸的压强,实现闭环控制接触力、实时主动调节接触力的大小、接触轮恒力稳定贴合工件表面,确保加工介质和工件的有效接触,使工件产品的表面具有较高的精度和保持较高的磨抛品质,降低工件返工率、报废率,实用性强。(An active constant pressure control abrasive belt machine belongs to the technical field of abrasive belt machines and comprises a base, a dust collecting hopper, a driving part, a vertical plate, an inert wheel C, a tensioning part, a manual valve, an offset adjusting part, an active constant force floating control part, an abrasive belt, an inert wheel B, a manual pressure regulating valve, a precise pressure regulating valve, an electric proportional valve and a triplet. The invention uses compressed air as a medium to control the contact wheel of the belt sander to move forwards or backwards through the air cylinder, so that the contact wheel can compensate the deviation of the appearance of a workpiece and the abrasion of the workpiece and an abrasive material, the magnitude of the contact force between the contact wheel and the workpiece is monitored in real time through the force sensor, the contact force value is fed back to the front end to be compared with a set force value, the pressure of the air cylinder is effectively adjusted through the electric proportional valve, the precise pressure adjusting valve and a corresponding algorithm, the contact force is controlled in a closed-loop mode, the magnitude of the contact force is adjusted actively in real time, the constant force of the contact wheel is stably attached to the surface of the workpiece, the effective contact between a processing medium and the workpiece is ensured, the surface of a workpiece product has higher precision and higher grinding and polishing.)

1. An active constant-pressure control abrasive belt machine is characterized by comprising a base (2), a dust collecting hopper (6), a driving part (7), a vertical plate (8), an inert wheel C (9), a tensioning part (10), a manual valve (11), a deviation adjusting part (12), an active constant-force floating control part (13), an abrasive belt (14), an inert wheel B (15), a manual pressure adjusting valve (16), a precise pressure adjusting valve (17), an electric proportional valve (18) and a triplet (19); the base (2) is a closed frame supporting structure, and the lower end of the base is provided with a foot margin; the dust collecting hopper (6) is fixed at the front end of the base (2), the vertical plate (8) is installed on the base (2) and the lower end of the vertical plate is fixed, the driving part (7) is fixedly connected to the lower left corner of the vertical plate (8), the inert wheel C (9) is installed on the vertical plate (8) close to the position of the middle part to the left so as to increase the contact wrap angle of the abrasive belt (14) on the driving wheel (20) and the tension wheel (26), the tension part (10) is installed on the upper left corner of the vertical plate (8), the manual valve (11) is installed on the vertical plate (8), the deviation adjusting part (12) is installed on the vertical plate (8), the active constant force floating control part (13) is installed on the vertical plate (8) close to the front end, the abrasive belt (14) is wound on the driving wheel (20), the tension wheel (26), The inertia wheel B (15) is installed on the vertical plate (8), the manual pressure regulating valve (16) is installed on the vertical plate (8) and close to the tensioning part (10), and the precise pressure regulating valve (17) and the electric proportional valve (18) are installed on the vertical plate (8) and close to the active constant-force floating control part (13).

2. An active constant pressure control belt sander as set forth in claim 1, characterized in that said drive unit (7) comprises a drive wheel (20), a motor mounting plate (21), a drive motor (22), said drive wheel (20) being a rubber wheel, and the wrap angle of said sanding belt (14) on said drive wheel (20) must be between 120 ° and 150 °.

3. An active constant pressure control belt sander as set forth in claim 1, characterized in that said triplet (19) comprises an air filter, a pressure reducing valve, an oil mist separator, said air filter having a filtration fineness of less than 5 μm and said oil mist separator having a filtration fineness of less than 0.01 μm.

4. The active constant-pressure control belt sander as recited in claim 1, wherein the tensioning member (10) comprises a connecting plate a (23), a rolling slider module B (24), a spindle seat plate a (25), a tensioning wheel (26), a tensioning spindle member (27), a tensioning block (28), a floating joint a (29), an air joint (30), a proximity switch (31), a tensioning cylinder (32), and a tensioning cylinder block (33), the connecting plate a (23) is connected to the upright plate (8), the rolling slider module (24) is fixed to the connecting plate a (23), the tensioning cylinder (32) is connected to the connecting plate a (23) through the tensioning cylinder block (33), and the tensioning block (28) is connected to the end of the tensioning cylinder (32) through the floating joint a (29).

5. An active constant pressure control belt sander as set forth in claim 1, characterized in that said precision pressure regulating valve (17) and electrical proportional valve (18) are mounted on said riser (8) in close proximity to said active constant force float control member (13).

6. The active constant-pressure control belt sander according to claim 1, wherein the active constant-force floating control component (13) comprises a cylinder bracket (43), an air pipe joint (44), an air cylinder (45), a rolling slider module (46), a floating joint B (47), an adapter (48), a force sensor (49), a connecting block A (50), a connecting block B (51), a contact wheel spindle seat plate (52), a contact wheel (53), a contact wheel spindle component (54), a connecting plate C (56), an auxiliary wheel seat plate (57), an auxiliary wheel (58), an auxiliary wheel spindle component (59), the air cylinder (45) is mounted on the vertical plate (8) through the cylinder bracket (43), the rolling slider module (46) is mounted on the vertical plate (8), and the connecting plate C (56) is fixed on the rolling slider module (46), the force sensor (49) is mounted between the cylinder (45) and a connection plate C (56), and the contact wheel (53) and the auxiliary wheel (58) are mounted on the connection plate C (56).

Technical Field

The invention relates to an abrasive belt machine in the technical field of grinding and polishing application, in particular to an abrasive belt machine capable of actively controlling constant pressure.

Background

In recent years, along with popularization of grinding and polishing automation by using a robot, the application of an abrasive belt machine is common, a common robot grinding and polishing system comprises a robot, the abrasive belt machine, an upper material loading table, a lower material loading table and the like, a contact wheel of the traditional abrasive belt machine is mainly fixed, so that the quality of a product mainly depends on the technology of a technical person, the precision of the robot and the precision of a tool clamp, but the difference of the supplied materials of the product and the inconsistency of the production batch have great influence on the precision of the product, the phenomena of uneven grinding and polishing and the like are generated, the cost is directly increased, and the production efficiency is low.

The abrasive band machine of steerable power is mostly the size of spring control power in the existing market, size in the cylinder control, size of servo motor control power. The direct problem with controlling the amount of pressure, such as with a spring, is the non-adjustability of the force, while not providing a constant buffing pressure, and therefore greater limitations of use.

For example, patent No. CN109968161A discloses a one-way pressure control double-station belt sander in 2019, 7/5, which adopts a transmission mode that a servo motor drives, and 3 modes such as a rack and pinion, a sprocket, a ball screw and the like change rotation into linear motion to drive a contact wheel at the tail end to move to realize control of the magnitude of contact force.

For example, patent No. CN207027177U discloses a unidirectional pressure control double-station belt sander in 23.2.2018, in which a cylinder is connected to a contact wheel to drive the contact wheel to move forward or backward, and polishing with constant pressure is achieved in a passive control manner, the magnitude and amplitude difference of the contact force is large in practice, and the force cannot be effectively controlled to be constant, and meanwhile, the method adopts a sliding manner to move the contact wheel, so that the friction force is large, and the precision and response speed of force adjustment are greatly reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an active constant pressure control abrasive belt machine, which completes the active constant pressure control on the abrasive belt machine through a constant force floating control component, an electric proportional valve, a precise pressure regulating valve and other devices. The scheme has the characteristics of quick pressure regulation response and high precision.

The invention is realized by the following technology, the invention comprises a base, a dust collecting hopper, a driving part, a vertical plate, an inert wheel C, a tensioning part, a manual valve, an offset part, an active constant force floating control part, an abrasive belt, an inert wheel B, a manual pressure regulating valve, a precise pressure regulating valve, an electric proportional valve and a triple piece; the base is a closed frame supporting structure, and the lower end of the base is provided with a foot margin which can be fixed on the ground; the dust collecting hopper is fixed at the front end of the base and used for collecting metal or nonmetal dust in the grinding process, the vertical plate is installed on the base, the lower end of the vertical plate is fixed, the driving part is fixedly connected to the lower left corner of the vertical plate and used for providing power for an abrasive belt system in operation, the inert wheel C is installed on the vertical plate close to the position which is slightly left in the middle and used for increasing the contact wrap angle of an abrasive belt on the driving wheel and the tensioning wheel, the tensioning part is installed on the upper left corner of the vertical plate and used for adjusting the tensioning force of the abrasive belt, the manual valve is installed on the vertical plate and used for controlling the air pressure direction of the tensioning part, the deviation adjusting part is installed on the vertical plate and used for adjusting the position of the abrasive belt on the contact wheel in operation, the active constant-force floating control part is installed on the vertical plate close to the, The contact wheel and the auxiliary wheel are used for polishing workpieces, the inert wheel B is installed on the vertical plate, the manual pressure regulating valve is installed on the vertical plate and close to the tensioning part and used for changing the loop air pressure of the tensioning part to adjust the tension of the abrasive belt, and the precise pressure regulating valve and the electric proportional valve are installed on the vertical plate and close to the active constant-force floating control part and used for controlling and adjusting the pressure of the pressure cylinder.

Further, in the present invention, the driving part includes a driving wheel, a motor mounting plate, a driving motor, where the driving wheel is a rubber wheel, the wrapping angle of the abrasive belt on the driving wheel is required to be between 120 ° and 150 °, and the idler wheel 3 is required to be mounted at a proper position.

Furthermore, in the invention, the triple piece comprises an air filter, a pressure reducing valve and an oil mist separator, and in order to provide a stable dry and clean air source for equipment, the air pressure of the air source of the abrasive belt machine needs to be stabilized by using the pressure reducing valve, the filtering precision of the air filter is required to be less than 5 μm, and the filtering precision of the oil mist separator is required to be less than 0.01 μm.

Furthermore, in the invention, the tensioning part comprises a connecting plate A, a rolling slider module B, a spindle seat plate A, a tensioning wheel, a tensioning spindle part, a tensioning block, a floating joint A, an air joint, a proximity switch, an air cylinder and an air cylinder cushion block, wherein the connecting plate A is connected with the vertical plate, the rolling slider module is fixed on the connecting plate A, the rolling slider is required to stably slide on the sliding rail without clamping, the air cylinder is connected on the connecting plate A through the air cylinder cushion block, the tensioning block is connected at the tail end of the air cylinder through the floating joint A, the consistency of the axis is required to be ensured, and the air cylinder is prevented.

Furthermore, in the invention, the precise pressure regulating valve and the electric proportional valve are arranged on the vertical plate near the active constant force floating control component so as to reduce the volume of compressed air for effective operation in the operation process.

Furthermore, in the invention, the active constant force floating control component comprises a cylinder support, an air pipe joint, a cylinder, a rolling slider module, a floating joint B, an adapter, a force sensor, a connecting block A, a connecting block B, a contact wheel spindle base plate, a contact wheel spindle component, a connecting plate C, an auxiliary wheel base plate, an auxiliary wheel and an auxiliary wheel spindle component, wherein the cylinder is installed on a vertical plate through the cylinder support, the rolling slider module is installed on the vertical plate, the connecting plate C is fixed on the rolling slider module, the force sensor is installed between the cylinder and the connecting plate C, and the contact wheel (53) and the auxiliary wheel are installed on the connecting plate C.

Furthermore, in the invention, the cylinder used by the active constant force floating control component is a low-friction cylinder which has sensitive response and stable operation, has no tremble phenomenon during high-speed motion and no crawling phenomenon during low-speed motion, and can ensure the stability and reliability of constant force fitting.

Furthermore, in the invention, the rolling slider module used by the active constant force floating control component is installed on the vertical plate, pretightening force needs to be added to the rolling slider and the slider component to eliminate rolling clearance, and the phenomena of stable operation, i.e. blockage and the like in the module push-pull process need to be realized after the rolling slider and the slider component are installed, so that the sensitivity and the stability of constant force control are improved.

Furthermore, in the active constant-force floating control component, the floating joint, the adapter, the force sensor, the connecting block A, the connecting block B and the connecting plate C need to ensure the coaxiality with the cylinder when being installed, and the numerical value of the force sensor is 0 in a static state.

The invention has the beneficial effects that:

according to the invention, by adopting a force sensor information closed-loop feedback principle, the magnitude of the contact force between a grinding and polishing product and a contact wheel is actively detected in real time and is compared with a preset force value, and then the adjustment of the contact force can be calculated and controlled in real time through an electric proportional valve, a precise pressure regulating valve and a corresponding algorithm.

Drawings

FIG. 1 is a schematic view of the overall structure in an embodiment of the present invention;

FIG. 2 is a schematic view of the assembly of components in an embodiment of the invention;

FIG. 3 is a schematic illustration of components in an embodiment of the invention;

FIG. 4 is a schematic view of a drive member in an embodiment of the invention;

FIG. 5 is a schematic view of a tension member in an embodiment of the invention;

FIG. 6 is a schematic view of an offset component in an embodiment of the invention;

FIG. 7 is a schematic illustration of a constant force float control assembly in an embodiment of the present invention;

the reference numbers in the drawings are respectively: 1. a foot margin, 2, a base, 3, a side door, 4, an upper cover shell, 5, an internal device, 6, a dust collecting hopper, 7, a driving component, 8, a vertical plate, 9, an inertia wheel C, 10, a tensioning component, 11, a manual valve, 12, an offset component, 13, an active constant force floating control component, 14, an abrasive belt 15, an inertia wheel B, 16, a manual pressure regulating valve, 17, a precision pressure regulating valve, 18, an electric proportional valve, 19, a triple piece, 20, a driving wheel, 21, a motor mounting plate, 22, a driving motor, 23, a connecting plate A, 24, a rolling slide block module B, 25, a main shaft seat plate A, 26, a tensioning wheel, 27, a tensioning main shaft component, 28, a tensioning block, 29, a floating joint A, 30, an air joint, 31, a proximity switch, 32, an air cylinder, 33, an air cylinder cushion block, 34, a connecting plate B, 35, a rotatable shaft, 36, an offset main shaft component, 37, 38. the device comprises a tension fixing block 39, an adjusting hand wheel 40, a deflection plate 41, a rectangular spring 42, a deflection adjusting supporting block 43, a cylinder bracket 44, an air pipe joint 45, a cylinder 46, a rolling slider module 47, a floating joint B48, an adapter joint 49, a force sensor 50, connecting blocks A, 51, connecting blocks B and 52, a contact wheel spindle seat plate 53, a contact wheel 54, a contact wheel spindle part 55, connecting plates C and 56, an auxiliary wheel seat plate 57, an auxiliary wheel seat plate 58, auxiliary wheels 59 and an auxiliary wheel spindle part.

Detailed Description

The following embodiments of the present invention are described in detail with reference to the accompanying drawings, and the embodiments and specific operations of the embodiments are provided on the premise of the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.

Examples

Examples of the invention as shown in fig. 1 to 7, the invention comprises an anchor foot 1, a base 2, a side door 3, an upper cover 4, an internal device 5, a dust collecting hopper 6, a driving part 7, a vertical plate 8, an idler wheel C9, a tensioning part 10, a manual valve 11, an offset adjusting part 12, an active constant force floating control part 13, an abrasive belt 14, an idler wheel B15, a manual pressure adjusting valve 16, a precise pressure adjusting valve 17, an electric proportional valve 18, a triple piece 19, a driving wheel 20, a motor mounting plate 21, a driving motor 22, a connecting plate a23, a rolling slider module B24, a main shaft seat plate a25, a tensioning wheel 26, a tensioning main shaft part 27, a tensioning block 28, a floating joint a29, an air joint 30, a proximity switch 31, a tensioning air cylinder 32, an air cylinder cushion block 33, a connecting plate B34, a rotatable shaft 35, an offset main shaft part 36, an offset adjusting wheel 37, an offset fixing block 38, an adjusting hand wheel 39, the device comprises an offset-adjusting supporting block 42, a cylinder bracket 43, an air pipe joint 44, an air cylinder 45, a rolling slider module 46, a floating joint B47, an adapter 48, a force sensor 49, a connecting block A50, a connecting block B51, a contact wheel spindle seat plate 52, a contact wheel 53, a contact wheel spindle component 54, a connecting plate C56, an auxiliary wheel seat plate 57, an auxiliary wheel 58 and an auxiliary wheel spindle component 59.

In this embodiment, the manual valve 11 is closed to make the tension cylinder 32 in the tension unit 10 in the retracted state, the abrasive belt 14 is wound around the driving wheel 20, the idler wheel C9, the tension wheel 26, the deflection wheel 37, the contact wheel 53, the auxiliary wheel 58, etc. respectively, the manual pressure regulating valve 16 is regulated to a proper pressure, the manual valve 11 is opened to connect the air source to the tension cylinder 32 in the tension unit 10, and the abrasive belt 14 is tensioned.

When the power supply is switched on, the driving motor 22 drives the driving wheel 20 to rotate, the driving wheel 20 drives the abrasive belt 14 to rotate, and the abrasive belt 14 drives the inertia wheel C9, the tension wheel 26, the deflection adjusting wheel 37, the contact wheel 53 and the auxiliary wheel 58 to synchronously rotate.

The two active constant pressure control polishing areas are mainly arranged, one is arranged on a contact wheel 53 in the active constant force floating control part 13, and the other is arranged between the contact wheel 53 and an auxiliary wheel 58 in the active constant force floating control part 13, wherein the contact wheel 53 is a hard contact area, and the contact wheels with different hardness can be replaced to meet the requirements of products with different materials and surface quality; the area between the contact wheel 53 and the auxiliary wheel 58 is a free polishing area, and the abrasive belt has good polishing elasticity and strong cladding property, can be in better contact with a product, and is suitable for the fine processing of products such as an outer arc surface and the like.

The air cylinder 45 in the active constant force control part 13 is connected in series with the precise pressure regulating valve 17 and the electric proportional valve 18 through a PU air pipe, an air source needs to be cleaned by an air filter and an oil mist separator in the triple piece 19 and the pressure of a pressure reducing valve is stabilized, a contact force value is preset according to the requirements of a grinding and polishing process, and the grinding and polishing of a workpiece are implemented.

In the grinding and polishing operation, a workpiece is in contact operation with the abrasive belt 14 in an active constant-pressure control area, according to the force sensor information closed-loop feedback principle, the force sensor 49 actively detects the actual contact pressure value of the product and the constant-pressure control area in real time, compares the actual contact pressure value with a preset force value, and can calculate and control the adjustment of the contact force in real time through an electric proportional valve, a precise pressure regulating valve and a corresponding algorithm.

If the actual contact pressure is greater than the preset contact force value, the system will control the electric proportional valve 18 to decrease the supply side pressure, and the air cylinder 45 will drive the contact wheel 53 and the auxiliary wheel 58 at the ends thereof and the related parts thereof to retract, and if the actual contact pressure is less than the preset contact force value, the system will control the electric proportional valve 18 to increase the supply side pressure, and the air cylinder 45 will drive the contact wheel 53 and the auxiliary wheel 58 at the ends thereof and the related parts thereof to extend.

In this embodiment the proximity switch 31 in the tensioning part 10 is effective to detect the belt condition and feed back safety status information. When the abrasive belt 14 is in a loose state, the tensioning cylinder 32 is in a retracted state at the moment, the proximity switch 31 detects a corresponding signal, triggers the active constant-pressure control abrasive belt machine to alarm and display an error, and prompts an operator to tension the abrasive belt 14; if, during operation, abrasive belt 14 is in a broken condition. At the moment, the tensioning cylinder 32 is in a fully extended state, the proximity switch 31 detects a corresponding signal, and the active constant-pressure control abrasive belt machine is also triggered to give an alarm and display an error, so that an operator is prompted to replace a new abrasive belt 14.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.