Tensioning wheel assembly for grinding belt sander
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-03-20
AI Technical Summary
In existing grinding equipment, the uneven distribution of abrasive belt tension is caused by the inconsistent diameters of the upper and lower tension rollers, resulting in belt deviation and excessive local stress, which affects grinding accuracy and equipment stability.
Using upper and lower tensioning rollers of the same size, and a tensioning wheel assembly consisting of components such as a swing beam vertical plate, a swing cylinder, a servo motor, and a ball screw jack, the sanding belt is uniformly tensioned and can be adjusted to swing, ensuring that the sanding belt is subjected to uniform force during operation.
It improves the service life and grinding quality of the abrasive belt, reduces equipment vibration and noise, lowers maintenance costs, and enhances equipment stability and processing accuracy.
Smart Images
Figure CN224011927U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a grinding machine technical field especially relates to a kind of for grinding abrasive belt machine's tensioning wheel assembly. BACKGROUND
[0002] Circuit board is the key component of electronic equipment, and its surface quality and precision are crucial to the performance of the equipment. During the manufacturing process of circuit board, surface grinding is a common process aimed at ensuring the flatness and accuracy of the circuit board. As a common grinding equipment, abrasive belt grinding machine mainly drives the abrasive belt to circulate by the grinding head, achieving polishing and finishing of workpieces. In order to ensure the grinding quality and service life of the abrasive belt, the abrasive belt grinding machine is usually equipped with a tensioning wheel assembly to maintain the stable operation of the abrasive belt.
[0003] In the prior art, some grinding equipment adopts the design of different diameters of upper and lower tensioning rollers, for example, the upper tensioning roller has a smaller diameter, while the lower tensioning roller has a larger diameter. Although this design can provide basic tensioning function to some extent, the different diameters of the two tensioning rollers at both ends can easily lead to uneven distribution of the abrasive belt tension, which in turn causes the abrasive belt to deviate, and the local stress to be too large, resulting in deformation or even breakage of the abrasive belt. In addition, uneven tension can also affect the grinding accuracy and reduce the surface treatment quality.
[0004] At the same time, the uneven stress of the tensioning structure can cause vibration and noise during the operation of the equipment, affecting the stability and service life of the equipment. Therefore, how to optimize the tensioning wheel structure, improve the stability of the abrasive belt operation, reduce the adjustment requirements of the equipment, and improve the overall grinding quality, has become an important problem for technicians in this field. UTILITY MODEL CONTENTS
[0005] The utility model aims to provide a kind of for grinding abrasive belt machine's tensioning wheel assembly, and the technical problem in view of the lack of prior art that uneven tension causes to avoid abrasive belt deviation to affect grinding quality and equipment life is solved.
[0006] To achieve the above-mentioned purpose, the specific technical scheme of a kind of for grinding abrasive belt machine's tensioning wheel assembly of the utility model is as follows:
[0007] A kind of for grinding abrasive belt machine's tensioning wheel assembly, the tensioning wheel assembly includes a swing cross beam vertical plate, swing cross beam vertical plate two ends are respectively fixedly provided with swing cross beam side plate, swing cross beam side plate two ends are respectively installed with support shaft, and the support shafts oppositely arranged are provided with the upper tensioning roller and the lower tensioning roller of identical size.
[0008] Further, the lower part of the tensioning wheel assembly is provided with a frame type beam, the top and bottom of the frame type beam are respectively provided with a beam top sealing plate and a beam bottom sealing plate, the front and rear of the frame type beam are respectively provided with a front vertical plate and a rear vertical plate, and the left and right sides of the frame type beam are respectively provided with a beam side sealing plate and a side mounting plate for mounting a servo motor; a swing cylinder is further arranged outside the swing beam side plate, the cylinder bottom of the swing cylinder is connected with the beam top sealing plate through a cylinder support, the cylinder support is fixedly connected with the beam top sealing plate, the swing cylinder is hinged with the cylinder support, and the shaft end of the swing cylinder is hinged with the swing beam side plate.
[0009] Further, a pair of ball screw elevators are arranged in the frame type beam, the ball screw elevators are connected with the beam bottom sealing plate, the ball screw elevators are provided with a reversing gear, a connecting rod is arranged between the two ball screw elevators, one end of the connecting rod is connected with the servo motor, the servo motor drives the connecting rod in the axial direction, the connecting rod rotates and drives the ball screw elevators to ascend and descend through the reversing gear.
[0010] Further, the frame type beam is provided with a tensioning track and a jacking cylinder for driving the tensioning track, and the tensioning track is fixedly connected with the swing beam vertical plate.
[0011] The tensioning wheel assembly for the grinding abrasive belt machine has the following advantages:
[0012] Since the upper tensioning roller and the lower tensioning roller have the same size, the stress of the abrasive belt during operation can be uniformly ensured, the problems such as deviation of the abrasive belt, uneven tension distribution or unstable operation caused by inconsistent diameters of the tensioning rollers can be avoided, the service life and grinding quality of the abrasive belt are improved, the structure of the tensioning wheel assembly is more symmetrical due to the same size of the tensioning rollers, mechanical wear caused by uneven stress is reduced, the overall stability and service life are improved, the uniform specification of the tensioning rollers facilitates manufacturing and replacement, maintenance cost is reduced, and efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 A three-dimensional structure diagram of the grinding abrasive belt machine is provided.
[0014] Figure 2 A first view three-dimensional structure diagram of the grinding head is provided.
[0015] Figure 3 A second view three-dimensional structure diagram of the grinding head is provided.
[0016] Figure 4 An explosion structure diagram of the grinding head is provided.
[0017] In the figure: 10, grinding head; 20, abrasive belt; 101, power roller; 102, swing beam upright; 103, swing beam side plate; 104, tensioning rail; 105, upper tensioning roller; 106, lower tensioning roller; 107, swing cylinder; 108, servo motor; 109, support shaft; 110, beam top sealing plate; 111, beam side sealing plate; 112, side mounting plate; 113, beam bottom sealing plate; 114, front upright; 115, rear upright; 116, jacking cylinder; 117, ball screw lifter; 118, connecting rod. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.
[0019] Referring to Figure 1 and Figure 2 , the grinding abrasive belt machine is provided with a grinding head 10, and the grinding head 10 drives the abrasive belt 20 to rotate.
[0020] Referring to Figure 3 and Figure 4 , the grinding head 10 is provided with an inclined tensioning wheel assembly, and the tensioning wheel assembly comprises a swing beam upright 102, swing beam uprights 102 are fixedly provided at both ends respectively, swing beam side plates 103 are installed at both ends of the swing beam side plate 103, support shafts 109 are installed at both ends of the swing beam side plate 103, and tensioning rollers are arranged between the support shafts 109 arranged opposite to each other. From the above structure, it can be seen that two tensioning rollers are arranged, which are an upper tensioning roller 105 and a lower tensioning roller 106.
[0021] A frame type beam is arranged below the tensioning wheel assembly, the top and bottom of the frame type beam are respectively provided with a beam top sealing plate 110 and a beam bottom sealing plate 113, the front and rear of the frame type beam are respectively provided with a front upright 114 and a rear upright 115, and the left and right sides of the frame type beam are respectively provided with a beam side sealing plate 111 and a side mounting plate 112 for installing a servo motor 108.
[0022] A pair of ball screw lifters 117 are arranged in the frame type beam, the ball screw lifters 117 penetrate and are connected to the beam bottom sealing plate 113, the ball screw lifters 117 are built-in with a reversing gear, a connecting rod 118 is arranged between the two ball screw lifters 117, one end of the connecting rod 118 is connected with the servo motor 108, the servo motor 108 drives the connecting rod 118 through the shaft, the connecting rod 118 rotates and drives the ball screw lifter 117 to lift through the reversing gear.
[0023] The frame type beam is internally provided with a jacking cylinder 116 and a tensioning track 104, the tensioning track 104 is fixedly connected with the swing beam vertical plate 102, and the jacking cylinder 116 is used to drive the tensioning track 104 to make the tensioning wheel assembly act.
[0024] A swing cylinder 107 is further arranged outside the swing beam side plate 103, the cylinder body bottom of the swing cylinder 107 is connected with the beam top sealing plate 110 through a cylinder support, the cylinder support is fixedly connected with the beam top sealing plate 110, the swing cylinder 107 is hinged with the cylinder support, and the shaft end of the swing cylinder 107 is hinged with the swing beam side plate 103.
[0025] The bottom of the two ball screw elevators 117 is provided with a power roller 101, one end of the power roller 101 is provided with a driving wheel driven by another motor.
[0026] The abrasive belt 20 is wrapped outside the upper tensioning roller 105, the lower tensioning roller 106 and the power shaft 101.
[0027] Working principle
[0028] The abrasive belt machine drives the abrasive belt 20 to rotate through the grinding head 10 to realize grinding processing. The tensioning and adjustment of the abrasive belt are completed by the tensioning wheel assembly and the frame type beam structure, and the specific process is as follows:
[0029] 1. Tensioning adjustment
[0030] The servo motor 108 drives the connecting rod 118 to rotate, the connecting rod 118 drives the ball screw elevator 117 to move up and down through the reversing gear, so as to adjust the tightness of the abrasive belt.
[0031] The jacking cylinder 116 drives the tensioning track 104 to drive the tensioning wheel assembly to act, so as to realize further adjustment.
[0032] 2. Swing of the tensioning wheel assembly
[0033] The cylinder body of the swing cylinder 107 is fixed on the beam top sealing plate 110 through the cylinder support, the cylinder shaft end is hinged with the swing beam side plate 103, the swing beam side plate 103 is driven to swing, so as to adjust the angle of the tensioning wheel assembly, and the abrasive belt can adapt to different grinding requirements.
[0034] 3. Abrasive belt driving and grinding
[0035] The driving wheel of the power roller 101 is driven by another motor, so that the abrasive belt 20 is wrapped outside the upper tensioning roller 105, the lower tensioning roller 106 and the power roller 101, the abrasive belt is driven to rotate at high speed, and grinding processing is realized.
[0036] Advantages
[0037] 1. Stable and reliable tensioning control
[0038] Adopt ball screw elevator 117 + servo motor 108 to carry out accurate adjustment, ensure that the abrasive belt tension is uniform, improve the grinding precision.
[0039] The jacking cylinder 116 further optimizes the tension control, so that the abrasive belt is not easy to relax or slip during the grinding process.
[0040] 2. Adjustable swing structure, suitable for various working conditions
[0041] Through the swing of the tensioning roller assembly driven by the swing cylinder 107, the grinding flexibility is improved.
[0042] 3. Improve the processing quality and efficiency
[0043] The power roller 101 provides stable driving to ensure that the abrasive belt runs at a constant speed, reduces vibration, and improves grinding uniformity.
[0044] The double tensioning roller (upper tensioning roller 105, lower tensioning roller 106) + frame type beam structure provides stable support, so that the abrasive belt is uniformly stressed, and the grinding effect is improved.
[0045] In the prior art, the radial size of the upper tensioning roller 105 is 104mm, and the radial size of the lower tensioning roller 106 is 136mm. The different radial sizes of the two tensioning rollers will cause some problems.
[0046] In the embodiment, the radial sizes of the upper tensioning roller 105 and the lower tensioning roller 106 are equal, both being 136mm. The diameters of the upper tensioning roller 105 and the lower tensioning roller 106 are unified to 136mm, so that the tension distribution of the abrasive belt is uniform during operation, the problems of abrasive belt deviation and runout caused by uneven stress are avoided, the service life of the abrasive belt is improved, and the contact between the abrasive belt and the workpiece during grinding is more uniform, the processing precision and surface quality are improved; in addition, the periodic tension change during equipment operation is reduced, thereby reducing equipment vibration and noise, improving equipment stability and durability, reducing manual adjustment and maintenance cost, simplifying equipment design, improving the universality of parts, and reducing manufacturing and replacement cost.
[0047] By implementing the improved grinding head, the abrasive belt grinding machine ensures stable operation of the abrasive belt and uniform grinding through high-precision tension control, adjustable swing structure and stable driving system, and significantly improves the grinding quality and service life of the equipment.
[0048] In summary, the tensioning roller assembly for the abrasive belt grinding machine provided by the utility model unifies the diameters of the upper tensioning roller and the lower tensioning roller, which can eliminate uneven tension, avoid abrasive belt deviation, improve grinding quality, reduce equipment vibration and maintenance cost, and improve the reliability and production efficiency of the overall grinding equipment.
[0049] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A tensioning wheel assembly for a grinding belt abrasive machine, characterized in that, The tensioning wheel assembly includes a swing beam upright plate (102), with swing beam side plates (103) fixedly installed at both ends of the swing beam upright plate (102), and support shafts (109) installed at both ends of the swing beam side plates (103). An upper tensioning roller (105) and a lower tensioning roller (106) of the same size are arranged between the opposite support shafts (109).
2. The tensioning wheel assembly for a grinding belt machine according to claim 1, characterized in that, A frame-type crossbeam is provided below the tensioning wheel assembly. A top sealing plate (110) and a bottom sealing plate (113) are provided at the top and bottom of the frame-type crossbeam, respectively. A front upright plate (114) and a rear upright plate (115) are provided at the front and rear of the frame-type crossbeam, respectively. A side sealing plate (111) and a side mounting plate (112) for mounting a servo motor (108) are provided on the left and right sides of the frame-type crossbeam, respectively. A swing cylinder (107) is also provided on the outside of the swing crossbeam side plate (103). The bottom of the swing cylinder (107) is connected to the top sealing plate (110) of the crossbeam through a cylinder bracket. The cylinder bracket is fixedly connected to the top sealing plate (110) of the crossbeam. The swing cylinder (107) is hinged to the cylinder bracket. The shaft end of the swing cylinder (107) is hinged to the swing crossbeam side plate (103).
3. A tensioning wheel assembly for a grinding belt machine according to claim 2, characterized in that, A pair of ball screw jacks (117) are installed inside the frame-type crossbeam. The ball screw jacks (117) pass through and are connected to the bottom sealing plate (113) of the crossbeam. The ball screw jacks (117) have built-in reversing gears. A connecting rod (118) is provided between the two ball screw jacks (117). One end of the connecting rod (118) is connected to a servo motor (108). The servo motor (108) drives the connecting rod (118) axially. The connecting rod (118) rotates and causes the ball screw jacks (117) to rise and fall through the reversing gear.
4. A tensioning wheel assembly for a grinding belt machine according to claim 3, characterized in that, The frame-type crossbeam is equipped with a tensioning rail (104) and a lifting cylinder (116) for driving the tensioning rail (104). The tensioning rail (104) is fixedly connected to the swing crossbeam upright plate (102).