JPH0631942U - Support plate for centerless grinder with screwed tip - Google Patents

Abstract

(57) [Abstract] [Purpose] In the conventional centerless grinder, the work receiving plate was brazed integrally by abutting the tip made of special steel or alloy material and the body made of general-purpose steel. As the length of the backing plate becomes longer, it takes time and effort to braze the tip to obtain parallel accuracy, and there is a problem in work efficiency.Because the tip is worn, it is brazed integrally with the main body. The department also had to be replaced at the same time, and there was a problem in terms of resource conservation. The purpose is to solve these problems. [Structure] The V-shaped lower end of the centerless grinder is configured such that the tip 2 made of special steel or alloy material and the main body 3 made of general-purpose steel can be separated, and the lower end of the tip 2 projects. 4, the upper end 5 of the main body 3 is formed in a concave V shape, both are brought into contact with each other, a tap hole 6 is formed in the lower end 4 of the front end 2, and the main body 3 side is integrated with a tightening bolt 7 To conclude. Lower end 4 of tip 2 and upper end 5 of body 3
Is preferably abutted in a V shape of 60 to 120 ° angle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a centerless grinder backing plate that supports a workpiece during grinding in a centerless grinder.

[0002]

[Prior art]

 In the centerless grinder, as shown in FIG. 2, the workpiece W is inserted between the grinding tooth 8 and the feed tooth 9, and the grinding work is performed while the workpiece W is supported by the vertical centerless grinder receiving plate 1 '. ing. The upper surface of the backing plate 1 ′ is correctly parallel to the axis of the grinding wheel 8, is close to the grinding wheel 8 side, and is installed at an appropriate height according to the diameter of the workpiece W. In addition, in order to improve the roundness of the workpiece W and improve the rotation effect, the inclined surface is set at about 10 ° to 40 °. Further, since the backing plate 1'should be wear-resistant and have a low frictional resistance with the workpiece W, the tip 2'is formed of an expensive special steel material or an alloy material, and the holder 10 is The main body 3 ', which has only the function of being held, was made of general-purpose steel, and the tip 2'and the main body 3' were butted and integrally brazed for ease of handling. S is a brazing part.

[0003]

[Problems to be solved by the device]

 However, when the length of the centerless grinder receiving plate 1'becomes longer than 300 mm, it takes a lot of time to braze the tip 2'to obtain parallel accuracy, which is a problem in terms of work efficiency. Further, when the tip 2'is worn, it is brazed together, so that the body 3'must be replaced at the same time, which is a problem in terms of resource saving. The present invention aims to solve the above-mentioned problems in the receiving plate of the centerless grinder.

[0004]

[Means for Solving the Problems]

 As shown in FIG. 1, the receiving plate of the present invention is a centerless grinder receiving plate 1 with a screwed tip portion, and when the tip portion 2 is worn, it can be easily replaced and is in operation. Is characterized in that the parallel accuracy can be maintained. That is, according to the present invention, the receiving plate of the centerless grinder is configured to be separable by the tip portion 2 made of special steel material or alloy material and the main body portion 3 made of general-purpose steel material, and the lower end of the front end portion 2 is protruded V. The lower end 4 of the character is formed, and the upper end 5 of the main body 3 is formed into a concave V shape, and both are brought into contact with each other, and a tap hole 6 is formed in the lower end 4 of the front end 2 to tighten the bolt from the main body 3 side. It is a centerless grinder receiving plate 1 of a tip screwing type, which is integrally fastened by 7. Further, the present invention is characterized in that the tip portion 2 and the main body portion 3 are brought into contact with each other in a V-shape having an angle of 60 to 120 °, particularly preferably 90 °, and are integrally fastened.

[0005]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side cross-sectional view of a tip screwing type receiving plate of the present invention, and FIG. 2 is an explanatory diagram of a grinding operation in a centerless grinder using a conventional receiving plate. In the figure, 1 is a receiving plate for a centerless grinder with a screwed tip, 1'is a receiving plate for a centerless grinder with a conventional brazing tip, 2 is a tip, 2'is a conventional tip, 3 Is a main body portion, 3'is a conventional main body portion, 4 is a lower end, 5 is an upper end, 6 is a tap hole, 7 is a tightening bolt, 8 is a grinding tooth, 9 is a feeding tooth, 10 is a holder, and W is a workpiece. , S is a brazing part. The tipless screwing type centerless grinder receiving plate 1 of the present invention is the same as the conventional tipless brazing type centerless grinder receiving plate 1'with the tip portion 2'and the body portion 3'in the brazing portion S. In contrast to integrally brazing, the tip portion 2 made of special steel material or alloy material and the main body portion 3 made of general-purpose steel material are separately separated, and a plurality of tightening bolts 7 are provided as described in detail below. It is concluded as one.

The tip 2 has an inclined upper surface, thickness and length that are the same shape as the conventional tip 2 ′, and can support the workpiece W during the grinding operation as in the conventional case. Further, the main body 3 has a convex shape having the same vertical steps as the conventional main body 3 ', and the upper connecting portion 11 has the same thickness and length as the tip portion 2 and the lower holding tool. Reference numeral 12 has the same thickness, length and central relief grooves A and B as the main body 3'of the related art, and can be held in the holder 10 as in the conventional case. Further, the lower end 4 of the tip portion 2 projects in a V shape, and the upper end 5 of the main body portion 3 is recessed in a V shape so that they are aligned and abutted. Further, a plurality of tap holes 6 are machined in the lower end 4 of the tip portion 2, and a plurality of bolt mounting holes are machined in the body portion 3 in accordance with the tap holes 6, so that the tip portion 2 is formed from the body portion 3 side. The tightening bolt 7 can be fastened integrally and accurately. The height of the centerless grinder receiving plate 1 when the tip part 2 and the main body part 3 are integrally fastened is the same as that of the conventional centerless grinder receiving plate 1 ', and the receiving plate 1 of the present invention is externally dimensioned. It is the same as the conventional receiving plate 1 '. Thus, when the receiving plate 1 of the present invention is used in place of the conventional receiving plate 1 ', the relative relationship of the centerless grinder with respect to the grinding tooth 8, the feed tooth 9, the holder 10 and the workpiece 10 is unchanged. Therefore, the same grinding work as in the past can be performed.

The receiving plate 1 for the centerless grinder of the present invention, which is screwed in the tip portion, is characterized in that it can be easily replaced when the tip portion 2 is worn. Since they are in contact with each other, the parallel accuracy with respect to the axis of the grinding machine 8 can be accurately reproduced and maintained. Further, the thrust load applied to the inclined upper surface of the tip portion 2 during the grinding work is supported by the main body portion 3 through the V-shaped contact surface and the tightening bolt 7, and the torsion load is Since it is securely supported by the main body 3 via the V-shaped contact surface, it is possible to maintain parallel accuracy, which is the same as that of the conventional integral brazing centerless grinder receiving plate 1 '. According to the inventor's actual experience, the contact angle of the V-shaped contact surface is preferably in the range of 60 ° to 120 °, and when the contact angle is smaller than this range, the height of the tip portion 2 is high. If the contact angle is larger than the above range, the bearing capacity for the thrust load and the torsion load may decrease, so the contact angle is set to 90 °. It turned out that the case is effective for both, and it is easy to manufacture and is optimal.

[0008]

[Effect of device]

 As described above, the tipless screw type centerless grinder support plate of the present invention can be easily replaced when the tip part is worn, and thus has a significantly resource-saving effect compared to the conventional brazing type. Also, since the tip and body are abutted and fastened in a V-shape, parallel accuracy with respect to the axis of the grinding machine can be accurately reproduced when replaced, and thrust load and torsion during grinding work can be accurately reproduced. The load can be reliably supported by the main body and the horizontal accuracy can be maintained, which is the same as the conventional brazing method. Particularly, by setting the contact angle of the V-shaped contact surface to about 90 °, resource-saving and stable grinding work in the centerless grinder can be expected.

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of a receiving plate for a centerless grinder of a tip screwing type of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a grinding operation using a conventional brazing tip centerless grinder receiving plate.

[Explanation of symbols]

1 Tip screwing type centerless grinder receiving plate 1'Center brazing type receiving plate for centerless grinder 2 Tip part 2'Conventional tip part 3 Body part 3'Conventional body part 4 Lower end 5 Upper end 6 Tap hole 7 Tightening bolt 8 Grinding tooth 9 Feed tooth 10 Holding tool 11 Connecting part 12 Holding part W Workpiece A Escape groove B Escape groove S Brazing part

Claims (3)

[Scope of utility model registration request] 1. A support plate for a centerless grinder,
A tip portion 2 made of a special steel material or an alloy material and a body portion 3 made of a general-purpose steel material are configured to be separable, and a lower end of the tip portion 2 is formed as a protruding V-shaped lower end 4, and an upper end 5 of the body portion 3 is recessed. Inserted V-shape, contact both, lower end 4 of tip 2
A centerless grinder receiving plate 1 of a tip screwing type, characterized in that a tap hole 6 is formed in the main body 3 and is integrally fastened from a main body portion 3 side by a fastening bolt 7. 2. The tip portion according to claim 1, wherein the lower end 4 of the tip portion 2 and the upper end 5 of the main body portion 3 are brought into contact with each other in a V-shape of 60 to 120 ° to be fastened together. Screw-type centerless grinder support plate 1. 3. The screwing of the tip end portion according to claim 1, wherein the lower end 4 of the tip end portion 2 and the upper end 5 of the main body portion 3 are brought into contact with each other in a V shape of 90 ° angle and fastened together. Support plate for centerless grinder of type 1.