A double-head grinding floating mechanism for T-shaped cast pipes

Abstract

The present invention discloses a double-headed grinding floating mechanism for T-shaped cast pipes, comprising: a double-headed grinding motor, with grinding wheels of different sizes mounted on its two output ends; the double-headed grinding motor fixedly connected to the lower surface of a carrier plate; a symmetrically arranged floating slide fixedly connected to the upper surface of the carrier plate; a sliding groove with an upper portion inclined toward the outside of the carrier plate; a floating plate A, hingedly fixedly connected to the upper surface of the carrier plate, with a double-headed cylinder disposed therebetween; the double-headed cylinder fixedly connected to the lower surface of the floating plate A; roller bearings fixedly mounted at both ends of the double-headed cylinder, the roller bearings slidingly connected within the sliding groove; and a flange for connecting to an industrial robot disposed above the floating plate A. The present invention employs a double-headed electric spindle with different grinding wheels mounted on both ends, which can adapt to completing the grinding of DN80-DN400 T-shaped pipes, avoiding frequent replacement of grinding wheels when the production line is a mixed-line production line.

Description

Technical Field

[0001] The invention relates to a floating grinding mechanism for grinding the surface of a casting, in particular to a double-head grinding floating mechanism for a T-shaped cast pipe. Background Art

[0002] Castings are used in various industries, but during use, castings often need to be processed at sharp corners, especially when grinding T-shaped cast pipes. If a robot is required for grinding, frequent replacement of grinding wheels when the production line is a mixed line will take up a lot of time. If manual grinding is used, the cost is too high, the efficiency is slow, and accidents are prone to occur during the grinding process. The current automatic grinding lacks flexible buffering, which can damage the grinding wheel and even the product during the actual grinding process.

[0003] The patent application number is "202121740486.4", and the patent name is a floating grinding mechanism for grinding the surface of castings. It provides a grinding mechanism with a floating device, which can not only meet the grinding needs but also reduce the harm of dust to the human body. However, the following problems still exist.

[0004] 1. Set the grinding wheels on the same side. When grinding, if a large grinding wheel is used, when the large grinding wheel is damaged, the small grinding wheel will often hit the cast pipe, causing a production accident. If a small grinding wheel is used for grinding, if the casting encounters a bulge, the grinding wheel will scratch the casting;

[0005] Second, this patent uses a guide shaft in conjunction with a linear bearing box (cylindrical shaft + cylindrical bearing) to complete forward and backward movement. When the entire mechanism is subjected to lateral force during grinding, the steel balls in the linear bearing box and the guide shaft, and the bearing and the cylindrical shaft are in point contact. When subjected to large lateral forces during grinding, and in a dusty environment during grinding, the steel balls may get stuck in dust, which may easily damage and scratch the guide column, further affecting the floating effect. The guide shaft has a short lifespan and is a consumable part. If it is not replaced in time, the entire mechanism will not be able to return to the original position, and then a collision will occur.

[0006] 3. When this product is linked with the robot, there are no protective measures. If a malfunction occurs during actual use, it cannot be connected for timely shutdown, posing a safety hazard. Summary of the Invention

[0007] The present invention provides a double-headed floating grinding mechanism for T-type cast pipes. The device adopts a double-headed electric spindle with different grinding wheels installed on both ends. It can adapt to the grinding work of DN80-DN400 T-type pipes and avoid frequent replacement of grinding wheels when the production line is a mixed line. The device is installed on a six-axis industrial robot. During operation, the operator does not need to grind at the workpiece, which reduces the harm of dust to the human body, protects the staff, and ensures the consistency of T-type pipe grinding.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] The present invention discloses,

[0010] A double-head grinding floating mechanism for T-shaped cast pipes, comprising:

[0011] A double-headed grinding motor, with grinding wheels of different sizes installed at its two output ends respectively, the double-headed grinding motor is fixedly connected to the lower surface of the carrier plate, and the upper surface of the carrier plate is fixedly connected to symmetrically arranged floating slides, and the floating slides are provided with a slide groove with the upper portion inclined toward the outside of the carrier plate;

[0012] A floating plate A is hingedly fixedly connected to the upper portion of the bearing plate, with a double-headed cylinder disposed therebetween. The double-headed cylinder is fixedly connected to the lower surface of the floating plate A, and roller bearings are fixedly connected at both ends of the double-headed cylinder. The roller bearings are slidably connected to the chute.

[0013] Wherein, a flange for connecting to an industrial robot is provided above the floating plate A.

[0014] Furthermore, photoelectric proximity switches are fixedly connected to the floating slides near both ends of the supporting plate. The photoelectric proximity switches are used to detect the position of the floating plate A from the supporting plate, and the photoelectric proximity switches are electrically connected to the robot control end.

[0015] Furthermore, a floating plate B is arranged parallel to the floating plate A, and two parallel linear slide rails are fixedly connected to the lower surface of the floating plate B. The linear slide rails are arranged parallel to the output shaft of the double-head grinding motor. Two sliders are fixedly connected to the upper surface of the floating plate A, and the sliders are slidably connected to the linear slide rails. Pneumatic springs are respectively provided on both sides of each linear slide rail, and the pneumatic springs are arranged parallel to the linear slide rails. The two ends of the pneumatic springs are respectively fixedly connected to the floating plate A and the floating plate B through fixed blocks.

[0016] Furthermore, the fixed end of the pneumatic spring located on the outside of the linear slide is fixedly connected to the floating plate A, and the telescopic end is fixedly connected to the floating plate B; the fixed end of the pneumatic spring located on the inside of the linear slide is fixedly connected to the floating plate B, and the telescopic end is fixedly connected to the floating plate A.

[0017] Furthermore, a T-shaped stopper is fixedly connected to the lower surface of the floating plate B, and two limit blocks are fixed to the upper surface of the floating plate A, and the limit blocks are respectively arranged on both sides of the T-shaped stopper.

[0018] Furthermore, a micro switch is fixedly connected above the limit block, and the micro switch is electrically connected to the robot control end for detecting the position of the floating plate B relative to the floating plate A.

[0019] Furthermore, the flange is fixedly connected to the upper surface of the floating plate B.

[0020] Furthermore, the limiting block is fixedly connected to a limiting column on one side facing the T-shaped stopper, and when the floating plate A and the floating plate B slide to a dead point, the limiting column presses against the T-shaped stopper.

[0021] Furthermore, a flexible canvas cover is hung between the floating plate A and the floating plate B.

[0022] The beneficial effects achieved by the present invention are:

[0023] 1. This patent uses a double-head grinding motor, and installs grinding wheels of different sizes at the two output ends of the motor. This is more practical for mixed production lines, and damage to the grinding wheel on one end will not affect the other end.

[0024] 2. Set up a front and rear floating mechanism: by using linear guide rails in conjunction with sliders, and equipping with two pairs (four) of pneumatic springs symmetrically installed to balance the force, when the electric spindle is subjected to force, the entire mechanism can float left and right; set up an up and down floating mechanism: by using a double-headed cylinder, roller bearings, and a floating slide, when the left grinding wheel is working, the left cylinder piston rod is working, and the right cylinder piston rod is not working; when the right grinding wheel is working, the right cylinder piston rod is working, and the left piston rod is not working. When the grinding wheel encounters an upward force from the raised part during grinding, the entire mechanism can float up and down, and by using linear guide rails and sliders (both are linear guide rails, a linear motion system with self-lubricating properties), the surface contact between the two is less prone to scratching and damage, thereby reducing the failure rate.

[0025] 3. By setting up the protection part: It consists of a pair of micro switches and a pair of photoelectric proximity switches. When the device floats left and right and up and down to the limit, the micro switches and photoelectric proximity switches will output signals, and the electric spindle and robot need to stop moving to protect the electric spindle and robot.

[0026] 4. By setting up a flexible canvas cover, it can effectively prevent grinding dust from entering the floating mechanism and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 Schematic diagram of the side structure of this patent.

[0029] Figure 2 This is a schematic diagram of the front structure of this patent.

[0030] Figure 3 This is a schematic diagram of the internal structure of this patent from above. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] like Figure 1-3 As shown, a double-head grinding floating mechanism for T-type cast pipes includes:

[0033] A double-headed grinding motor 10, with grinding wheels 102 of different sizes mounted on its two output ends, is fixedly connected to the lower surface of a carrier plate 101. Symmetrically arranged floating slides 1011 are fixedly connected to the upper surface of the carrier plate 101. The floating slides 1011 are provided with a slide groove 1012 with an upper portion inclined toward the outside of the carrier plate 101.

[0034] The floating plate A20 is hingedly fixedly connected to the upper surface of the supporting plate 101, with a double-ended cylinder 30 disposed therebetween. The double-ended cylinder 30 is fixedly connected to the lower surface of the floating plate A20, and roller bearings 301 are fixedly connected to both ends of the double-ended cylinder 30. The roller bearings 301 are slidably connected to the slide grooves 1012.

[0035] A flange 60 for connecting to an industrial robot is provided above the floating plate A20.

[0036] Specifically, the grinding wheel 102 generally adopts a grinding wheel of different sizes, which is installed at the two output ends of the double-headed grinding motor 10 respectively. There will be no interference problem during grinding, and there is no need to frequently replace the grinding wheel. The double-headed cylinder 30 is used, and roller bearings 301 are installed at both ends of the double-headed cylinder 30 respectively. The roller bearings are set in the slide groove 1012 set on the floating slide 1011, and the upper end of the slide groove 1012 is set to be inclined toward the outside of the bearing plate 101. In this way, when the grinding wheel 102 at which end is needed to work, that end of the double-headed cylinder 30 can be extended to achieve it, and the grinding wheel 102 at that end is in the working position.

[0037] Furthermore, photoelectric proximity switches 1013 are fixedly connected to the floating slides 1011 near both ends of the carrier plate 101. The photoelectric proximity switches 1013 are used to detect the position of the floating plate A20 from the carrier plate 101. The photoelectric proximity switches 1013 are electrically connected to the robot control end.

[0038] Specifically, by setting the photoelectric proximity switch 1013, the position status of the grinding wheel 102 can be monitored. Once it is damaged, the floating plate A20 will be at a dangerous distance from the supporting plate 101, and the signal will control the robot to stop grinding, which is safer.

[0039] Furthermore, a floating plate B40 is arranged parallel to the floating plate A20, and two parallel linear slide rails 401 are fixedly connected to the lower surface of the floating plate B40, and the linear slide rails 401 are arranged parallel to the output shaft of the double-head grinding motor 10. Two sliders 201 are fixedly connected to the upper surface of the floating plate A20, and the sliders 201 are slidably connected to the linear slide rails 401. Pneumatic springs 50 are respectively provided on both sides of each linear slide rail 401, and the pneumatic springs 50 are arranged parallel to the linear slide rails 401. The two ends of the pneumatic springs 50 are respectively fixedly connected to the floating plate A20 and the floating plate B40 through fixed blocks.

[0040] Specifically, by setting the linear slide rail 401 and the slider 201, the relative sliding between the floating plate A20 and the floating plate B40 is achieved, and then the stability of the distance between the two is ensured by setting the pneumatic spring 50, so as to achieve smooth grinding and avoid damage to the grinding wheel when there are protrusions on the casting.

[0041] Furthermore, the fixed end of the pneumatic spring 50 located on the outside of the linear slide rail 401 is fixedly connected to the floating plate A20, and the telescopic end is fixedly connected to the floating plate B40; the fixed end of the pneumatic spring 50 located on the inside of the linear slide rail 401 is fixedly connected to the floating plate B40, and the telescopic end is fixedly connected to the floating plate A20.

[0042] Specifically, the four pneumatic springs 50 are arranged opposite to each other in pairs, which further ensures the stability of the floating mechanism during use.

[0043] Furthermore, a T-shaped stopper 402 is fixedly connected to the lower surface of the floating plate B40 , and two limit blocks 202 are fixed to the upper surface of the floating plate A20 . The limit blocks 202 are respectively arranged on both sides of the T-shaped stopper 402 .

[0044] Specifically, by providing a T-shaped stopper 402 and two limit blocks 202 , the relative movement positions of the floating plate A 20 and the floating plate B 40 are physically limited.

[0045] Furthermore, a micro switch 2021 is fixedly connected to the upper portion of the limit block 202 . The micro switch 2021 is electrically connected to the robot control terminal and is used to detect the position of the floating plate B40 relative to the floating plate A20 .

[0046] Furthermore, the flange 60 is fixedly connected to the upper surface of the floating plate B40.

[0047] Specifically, the micro switch 2021 is set on the limit block 202, so that after the floating plate A20 and the floating plate B40 are relatively displaced into place, the T-shaped stopper 402 contacts the micro switch 2021 first, and the control center stops the operation of the double-head grinder through the signal to avoid production accidents.

[0048] Furthermore, the limiting block 202 is fixedly connected to a limiting column 2022 on the side facing the T-shaped stopper 402 . When the floating plate A 20 and the floating plate B 40 slide to a dead point, the limiting column 2022 presses against the T-shaped stopper 402 .

[0049] Specifically, the relative displacement dead point between the floating plate A20 and the floating plate B40 is realized by setting the limit column 2022, so as to prevent the T-shaped stopper 402 from squeezing and damaging the micro switch 221.

[0050] Furthermore, a flexible canvas shield (not shown in the figure) is hung between the floating plate A20 and the floating plate B40. Such a setting can effectively prevent grinding dust from damaging the floating mechanism.

[0051] The specific working process is as follows: first, the floating mechanism is connected to the industrial robot through a flange, and the micro switch 2021 and the photoelectric proximity switch 1013 are respectively connected to the robot control center. When enabled, whichever side of the grinding wheel is used will have the telescopic end of the double-headed cylinder extended, and the hinge between the floating plate A20 and the load-bearing plate 101 ensures which side of the double-headed cylinder swings up and down to achieve grinding. During grinding, if a protrusion of the casting is encountered, the floating plate A20 and the floating plate B can provide a certain left and right movement and its stability is guaranteed by the pneumatic spring, while the double-headed cylinder provides the distance for up and down swinging. Together, the two enable the floating mechanism to achieve stable grinding. At the same time, the micro switch 2021 and the photoelectric proximity switch 1013 together provide safety guarantees for the entire mechanism when it is working.

[0052] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A double-head grinding floating mechanism for T-type cast pipes, characterized in that: include, A double-headed grinding motor (10), wherein two output ends thereof are respectively provided with grinding wheels (102) of different sizes, wherein the double-headed grinding motor (10) is fixedly connected to the lower surface of a carrier plate (101), wherein the upper surface of the carrier plate (101) is fixedly connected to a symmetrically arranged floating slide (1011), wherein the floating slide (1011) is provided with a slide groove (1012) whose upper portion is inclined toward the outer side of the carrier plate (101); A floating plate A (20), the floating plate A (20) is hingedly fixedly connected to the upper part of the bearing plate (101), and a double-headed cylinder (30) is provided between the two, the double-headed cylinder (30) is fixedly connected to the lower surface of the floating plate A (20), and roller bearings (301) are fixedly connected to both ends of the double-headed cylinder (30), and the roller bearings (301) are slidably connected to the slide groove (1012). A floating plate B (40) is arranged in parallel above the floating plate A (20), and two parallel linear guide rails (401) are fixedly connected to the lower surface of the floating plate B (40), and the linear guide rails (401) are arranged in parallel with the output shaft of the double-headed grinding motor (10). The upper surface of the floating plate A (20) is fixedly connected to the upper surface of the floating plate B (40). Two sliders (201) are connected, and the sliders (201) are slidably connected to the linear slide rails (401). Pneumatic springs (50) are respectively provided on both sides of each linear slide rail (401). The pneumatic springs (50) are arranged parallel to the linear slide rails (401). The two ends of the pneumatic springs (50) are respectively fixedly connected to the floating plate A (20) and the floating plate B (40) through fixed blocks. The fixed end of the pneumatic spring (50) located outside the linear slide rail (401) is fixedly connected to the floating plate A (20), and the telescopic end is fixedly connected to the floating plate B (40). The fixed end of the pneumatic spring (50) located inside the linear slide rail (401) is fixedly connected to the floating plate B (40), and the telescopic end is fixedly connected to the floating plate A (20). The floating slides (1011) near both ends of the carrier plate (101) are respectively fixedly connected with photoelectric proximity switches (1013), the photoelectric proximity switches (1013) are used to detect the position of the floating plate A (20) from the carrier plate (101), and the photoelectric proximity switches (1013) are electrically connected to the robot control end. The lower surface of the floating plate B (40) is fixedly connected with a T-shaped stopper (402), the upper surface of the floating plate A (20) is fixed with two limit blocks (202), and the upper part of the limit blocks (202) is fixedly connected with a micro switch (2021), and the micro switch (2021) is electrically connected to the robot control end and is used to detect the position of the floating plate B (40) relative to the floating plate A (20). The limiting block (202) is fixedly connected to a limiting column (2022) on one side of the T-shaped stopper (402), and when the sliding between the floating plate A (20) and the floating plate B (40) reaches a dead point, the limiting column (2022) presses against the T-shaped stopper (402); A flange (60) for connecting to an industrial robot is provided above the floating plate A (20).

2. A double-head grinding floating mechanism for T-shaped cast pipe according to claim 1, characterized in that: The limiting blocks (202) are arranged on both sides of the T-shaped stopper (402).

3. The double-head grinding floating mechanism for T-shaped cast pipe according to claim 1, characterized in that: The flange (60) is fixedly connected to the upper surface of the floating plate B (40).

4. The double-head grinding floating mechanism for T-shaped cast pipe according to claim 1, characterized in that: A flexible canvas shield is hung between the floating plate A (20) and the floating plate B (40).

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