Jig plate for recovering cutting force of ceramic brush roller

Abstract

The utility model discloses a jig plate for recovering cutting force of a ceramic brush roller. A plurality of avoiding grooves are formed in the upper end face of the jig plate in a matrix mode. When the ceramic brush roller rotates above the jig plate and is in contact with the jig plate, the abrasive particles of the bristles of the ceramic brush roller are hidden in the avoiding grooves, the bristles on the peripheries of the abrasive particles are cut at the edges of the notches of the avoiding grooves, the abrasive particles protrude out of the surfaces of the bristles, and therefore the cutting force of the ceramic brush roller is recovered.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, in particular to a fixture plate used for restoring the cutting force of a ceramic brush stick. Background Art

[0002] A ceramic brush stick is a device used to remove burrs and resin from the surface of a PCB and to grind and polish the PCB. The outer periphery of the ceramic brush stick is provided with bristles, and the bristles are provided with abrasive particles for improving the cutting force of the ceramic brush stick. For example, a Chinese patent with a publication number of CN1906982A discloses a molded grinding brush and a method for manufacturing a printed circuit board, wherein the molded grinding brush includes bristles and abrasive particles dispersed on the bristles. During the process of grinding the PCB with the above-mentioned molded grinding brush, the abrasive particles protruding on the surface of the bristles will be ground flat, resulting in a reduction in the cutting force of the molded grinding brush. In view of this, the utility model proposes a jig plate for restoring the cutting force of a ceramic brush stick to solve the above-mentioned problem. Utility Model Content

[0003] The utility model overcomes the shortcomings of the above-mentioned technology and provides a fixture plate for recovering the cutting force of a ceramic brush roller.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A jig plate for recovering the cutting force of a ceramic brush stick, wherein a plurality of avoidance grooves are arranged in a matrix on the upper end surface of the jig plate; the avoidance grooves are used to accommodate abrasive grains on the ceramic brush stick, and the groove edges of the avoidance grooves are used to cut bristles on the periphery of the abrasive grains.

[0006] Preferably, the edge cross-section of the groove opening of the avoidance groove is a right angle.

[0007] Preferably, the avoidance groove is a square groove.

[0008] Preferably, the avoidance groove passes through the fixture plate in a vertical direction.

[0009] Preferably, the bottom of the avoidance groove is a square with a side length of 8 mm.

[0010] Preferably, the fixture plate is made of stainless steel.

[0011] Preferably, the interval between adjacent avoidance grooves is 5 mm.

[0012] Preferably, the thickness of the jig plate is in the range of 4 to 10 mm.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When the ceramic brush stick rotates above the jig plate and contacts the jig plate, the abrasive grains of the ceramic brush stick bristles are hidden in the avoidance groove, and the edge of the groove of the avoidance groove cuts the bristles around the abrasive grains, so that the abrasive grains protrude from the surface of the bristles, thereby restoring the cutting force of the ceramic brush stick. At the same time, restoring the cutting force of the ceramic brush stick in the above manner can make full use of the abrasive grains to polish the PCB, thereby reducing the cost of polishing the PCB with the brush stick.

[0015] 2. The jig plate is made of stainless steel, which makes the jig plate have high hardness and wear resistance, and can repeatedly cut the bristles around the periphery of the abrasive particles.

[0016] 3. The edge section of the avoidance groove is a right angle. When the jig plate is used to brush the chips, the apex of the right angle will contact the bristles. In conjunction with the rotation of the ceramic brush stick, the apex of the right angle will give the bristles a cutting force, effectively cutting the bristles around the periphery of the abrasive particles.

[0017] 4. The avoidance groove is a square groove. If the particle size of the abrasive grain is larger than the width of the avoidance groove, the square groove will cut the outside of the abrasive grain, so that multiple edges are formed on the periphery of the abrasive grain. The abrasive grain with edges has good cutting force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of a jig plate for recovering the cutting force of a ceramic brush stick of the utility model;

[0019] Figure 2 yes Figure 1 The cross-sectional view of the AA surface;

[0020] Figure 3 It is a schematic diagram of the function of the fixture plate and the ceramic brush stick of the utility model;

[0021] Figure 4 is a schematic diagram of a ceramic brush stick for restoring cutting force;

[0022] Figure 5 It is a schematic diagram of the function of the jig plate of the utility model and the thicker bristles;

[0023] The implementation, functional features and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following embodiments further describe the features of the present invention and other related features in detail to facilitate understanding by technicians in the same industry:

[0025] Reference Figure 1-5 , an embodiment of a jig plate for restoring the cutting force of a ceramic brush roller is proposed in the utility model:

[0026] A jig plate 1 for restoring the cutting force of a ceramic brush stick, wherein a plurality of avoidance grooves 11 are arranged in a matrix on the upper end surface of the jig plate 1; the avoidance grooves 11 are used to accommodate abrasive grains 21 on the ceramic brush stick 2, and the notch edges 12 of the avoidance grooves 11 are used to cut bristles 22 on the periphery of the abrasive grains 21.

[0027] like Figure 3 As shown, the process of restoring the ceramic brush stick 2 by the utility model is as follows: when the ceramic brush stick 2 rotates above the jig plate 1 and the bottom of the bristles 22 of the ceramic brush stick 2 contacts the jig plate 1, the abrasive grains 21 of the bristles 22 of the ceramic brush stick are hidden in the avoidance groove 11, preventing the abrasive grains 21 from being cut by the jig plate 1. The notch edge 12 of the avoidance groove 11 cuts off the bristles 22 on the periphery of the abrasive grains 21, making the bristles 22 shorter, and the abrasive grains 21 protrude from the surface of the bristles 22, thereby restoring the cutting force of the ceramic brush stick 2.

[0028] Compared with the rounded corners, the cross section of the notch edge 12 of the avoidance groove 11 is a right angle. When the jig plate 1 cuts the bristles 22, the right angle vertex 13 abuts against the bristles 22. With the rotation of the ceramic brush rod 2, the right angle vertex 13 will give the bristles 22 a cutting force, effectively cutting the bristles 22 on the periphery of the abrasive grains 21. If the cross section of the notch edge 12 of the avoidance groove 11 is an acute angle, it will affect the abrasive grains 21 from hiding in the avoidance groove 11. If the cross section of the avoidance groove 11 is an obtuse angle, the cutting force of the notch edge 12 of the avoidance groove 11 is insufficient, so it is preferred that the cross section of the notch edge 12 of the avoidance groove 11 is a right angle.

[0029] like Figure 1 As shown, the avoidance groove 11 is a square groove. If the particle size of the abrasive grain 21 is less than or equal to the width of the avoidance groove 11, the avoidance groove 11 protects the abrasive grain 21 during the process of cutting the bristles 22. If the particle size of the abrasive grain 21 is greater than the width of the avoidance groove 11, the square groove will cut the outer side of the abrasive grain 21, so that a plurality of facets are formed on the outer periphery of the abrasive grain 21. The abrasive grain 21 with facets has good cutting force and can effectively grind the PCB.

[0030] like Figure 2 As shown, the avoidance groove 11 penetrates the jig plate 1 in the vertical direction to prevent the top of the abrasive grain 21 from colliding with the jig plate 1 and causing wear.

[0031] The jig plate 1 is made of stainless steel, so that the jig plate 1 has high hardness and wear resistance, and can repeatedly cut the bristles 22 on the periphery of the abrasive particles 21 . The jig plate 1 is particularly suitable for cutting the bristles 22 of glass fibers.

[0032] Specifically, according to the particle size of the abrasive grains 21 usually set in the ceramic brush rod 2, the bottom of the avoidance groove 11 is set to a square with a side length of 8 mm. According to the usual spacing of the abrasive grains 21, the interval between adjacent avoidance grooves 11 is set to 5 mm. The thickness of the fixture plate 1 ranges from 4 to 10 mm, has good anti-deformation ability, and can withstand the pressure of the ceramic brush rod 2 on the fixture plate 1 when it rotates.

[0033] like Figure 3 and Figure 5 As shown, the utility model can be used for both ceramic brush sticks with finer bristles and ceramic brush sticks with thicker bristles, and has strong practicality.

[0034] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A jig plate for restoring the cutting force of a ceramic brush roll, characterized in that: The upper end surface of the jig plate (1) is provided with a plurality of avoidance grooves (11) arranged in a matrix; the avoidance grooves (11) are used to accommodate abrasive grains (21) on a ceramic brush stick (2), and the notch edges (12) of the avoidance grooves (11) are used to cut bristles on the periphery of the abrasive grains (21).

2. A jig plate for restoring the cutting force of a ceramic brush roll according to claim 1, characterized in that: The cross section of the notch edge (12) of the avoidance groove (11) is a right angle.

3. A jig plate for restoring the cutting force of a ceramic brush roll according to claim 1, characterized in that: The avoidance groove (11) is a square groove.

4. A jig plate for restoring the cutting force of a ceramic brush roll according to claim 1, 2 or 3, characterized in that: The avoidance groove (11) penetrates the fixture plate (1) in the vertical direction.

5. A jig plate for restoring the cutting force of a ceramic brush roll according to claim 1, 2 or 3, characterized in that: The jig plate (1) is made of stainless steel.

6. A jig plate for recovering the cutting force of a ceramic brush roll according to claim 3, characterized in that: The bottom of the avoidance groove (11) is a square with a side length of 8 mm.

7. A jig plate for restoring the cutting force of a ceramic brush roll according to claim 1, 2 or 3, characterized in that: The interval between adjacent avoidance grooves (11) is 5 mm.

8. A jig plate for restoring the cutting force of a ceramic brush roll according to claim 1, 2 or 3, characterized in that: The thickness of the jig plate ranges from 4 to 10 mm.

Images