A fixture for grinding circular scissors

Abstract

The present invention relates to a clamp for grinding circular scissors, comprising a mandrel, a shoulder is provided on the outer circumferential surface of the mandrel, an adjustment groove is provided on the mandrel along the axis of the mandrel and passes through the axis of the mandrel; the mandrel also comprises a spacer, a screw and a locking nut, the spacer is movably sleeved on the mandrel, the screw is arranged at one end of the spacer away from the shoulder, and the screw is located in the adjustment groove, both ends of the screw extend out of the adjustment groove, and each is screwed with a locking nut, and when the locking nut is screwed on the bolt until it is close to the mandrel, the screw is clamped in the adjustment groove. The beneficial effect of the present invention is that when the number of circular scissors changes, the position of the screw in the adjustment groove can be changed to achieve the clamping of different numbers of circular scissors, which is more flexible and convenient.

Description

Technical Field

[0001] The invention relates to the field of auxiliary equipment for steel strip production, and in particular to a clamp for grinding circular scissors. Background Art

[0002] In the production of cold-rolled steel strips, in order to meet the delivery width required by customers, the wide hot-rolled coils delivered in coils are usually cut into narrow steel strips of different specifications and widths for pickling and rolling. The circular shears on the slitting line are responsible for the main cutting function. In the production process, an important factor is that the cutting edge of the circular shears will become blunt after repeated use, and sometimes it will cause defects such as chipping. If the worn circular shears are used again, the edge of the cut steel strip will have poor fracture quality and large burrs, and it will not be possible to carry out deep processing in subsequent processes.

[0003] In order to enable the disc scissors to continue to serve in slitting, the complete set of disc scissors must be sharpened to ensure the sharpness of the tool edge. Disc scissors are usually used in groups of multiple pieces (determined by the number of strips). To ensure the consistency of the outer circle size of each piece of disc scissors, the blades used in the same group must be fixed on the disc scissors grinding fixture with the inner hole positioned, and the state of the blade slitting must be simulated before the external cylindrical grinder is used to grind it.

[0004] Traditional disc scissors grinding fixtures such as Figure 1 As shown, it includes a core shaft 1, a spacer sleeve 2 and a locking nut 4, the two ends of the core shaft 1 are respectively provided with a first epitaxial column 130 and a second epitaxial column 140, the end faces of the first epitaxial column 130 and the end faces of the second epitaxial column 140 are provided with tapered holes matching the top of the grinding machine, a shoulder 110 is provided on the outer circumferential surface of one end of the core shaft 1, the end of the core shaft 1 away from the shoulder 110 is provided with an external thread matching the locking nut 4, the locking nut 4 is screwed on the end of the core shaft 1 away from the shoulder 110, and the spacer sleeve 2 is sleeved on the core shaft 1, the diameter of the core shaft 1 is equal to the inner diameter of the disc shears 5 to be ground, in order to realize the inner hole positioning, a guide key 6 is provided between the disc shears 5 and the core shaft 1. When the disc scissors 5 to be sharpened are assembled on the disc scissors sharpening fixture, the disc scissors 5 are on the mandrel 1, and then at least one spacer 2 (the specific number is determined according to the number of disc scissors) is put on the mandrel 1 between the disc scissors 5 and the locking nut 4, and the locking nut 4 is rotated to press the disc scissors 5 between the spacer 2 and the shaft shoulder 110. When the number of disc scissors 5 is different during use, the disc scissors sharpening fixture needs to use different numbers of spacers 2, which is very inconvenient and has low flexibility. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a fixture for grinding circular scissors to overcome the deficiencies in the above-mentioned prior art.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a clamp for grinding disc scissors, including a core shaft, a shoulder is provided on the outer circumferential surface of the core shaft, and an adjustment groove is provided on the outer circumferential surface of the core shaft along the axial centerline direction of the core shaft, passing through the axial centerline of the core shaft and penetrating the core shaft; it also includes a spacer, a screw and a locking nut, the spacer movable sleeve is arranged on the core shaft, the screw is arranged at the end of the spacer away from the shoulder, and the screw is located in the adjusting groove, both ends of the screw extend out of the adjusting groove, and each is screwed with a locking nut, when the locking nut is screwed on the screw until it is close to the core shaft, the screw is clamped in the adjusting groove.

[0007] The beneficial effects of the present invention are as follows: when in use, multiple disc scissors to be sharpened are sleeved on the core shaft, and then the spacer is sleeved on the core shaft, and the screw is installed in the adjusting groove, and a locking nut is installed at each end of the screw, and the position of the screw in the adjusting groove is adjusted so that when the screw is clamped in the adjusting groove by the locking nut, the spacer is close to the disc scissors farthest from the shaft shoulder, thereby clamping the disc scissors. When the number of the disc scissors changes, the position of the screw in the adjusting groove can be changed to clamp different numbers of disc scissors. The present invention has strong versatility and is not affected by changes in the number and thickness of the disc scissors. Multiple pieces can be clamped in a set within a certain range, and the flexibility is better and more convenient.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the spacer sleeve includes an adjusting sleeve and a movable sleeve. The movable sleeve is arranged on the core shaft. The outer circumferential surface of the movable sleeve near the shaft shoulder is provided with an external thread, and the inner wall of the adjusting sleeve is provided with an internal thread. The adjusting sleeve is arranged on the end of the movable sleeve provided with the external thread and is screwed together with the movable sleeve.

[0010] A further beneficial effect of the above method is that if there is slight looseness during the clamping process, the adjusting sleeve can be rotated to move the adjusting sleeve toward the direction close to the disc scissors, and the overall length of the spacer sleeve will become larger, thereby further clamping the disc scissors to prevent loosening.

[0011] Furthermore, part of the outer surface of the locking nut protrudes outward to form a cylindrical extension, and an arc-shaped bayonet matching the extension is provided at one end of the movable sleeve close to the locking nut, and the central angle of the arc-shaped bayonet is less than 180°.

[0012] A further beneficial effect of the above is that when all the disc scissors are clamped, the outer extension of the locking nut is located in the arc-shaped bayonet, which can further prevent relative rotation between the movable sleeve and the core shaft, thereby ensuring overall stability.

[0013] Furthermore, the radial cross-section of the adjusting sleeve is a regular hexagon; or, the outer circumferential surface of the adjusting sleeve is provided with anti-slip grooves.

[0014] A further beneficial effect of adopting the above method is that it is convenient to rotate the adjustment sleeve.

[0015] Furthermore, the diameter of the screw is equal to or slightly smaller than the groove width of the adjustment groove.

[0016] A further beneficial effect of the above method is that it can prevent the screw rod from shaking too much in the adjusting groove along the groove width direction of the adjusting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a fixture for grinding circular scissors in the prior art;

[0018] Figure 2 It is a schematic diagram of the structure of the fixture for grinding circular scissors of the present invention;

[0019] Figure 3 It is a front view of the fixture for grinding circular scissors of the present invention;

[0020] Figure 4 A top view of the fixture for grinding the circular scissors of the present invention;

[0021] Figure 5 This is a cross-sectional view of the fixture for grinding circular scissors of the present invention after the circular scissors are assembled.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Mandrel, 110. Shoulder, 120. Adjustment groove, 130. First epitaxial column, 140. Second epitaxial column, 2. Spacer, 210. Adjustment sleeve, 220. Movable sleeve, 221. Arc bayonet, 3. Screw, 4. Locking nut, 410. Extension part, 5. Disc scissors, 6. Guide key. DETAILED DESCRIPTION

[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0025] like Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a fixture for grinding circular scissors includes a core shaft 1, and a shoulder 110 is provided on the outer circumferential surface of the core shaft 1. In the drawings given in this embodiment, the shoulder 110 is located at the left end of the core shaft 1, and an adjustment groove 120 is provided on the outer circumferential surface of the core shaft 1 along the axial direction of the core shaft 1, passing through the axial line of the core shaft 1 and penetrating the core shaft 1. Preferably, the left end of the adjustment groove 120 extends to near the shoulder 110, and the right end of the adjustment groove 120 extends to near the right end of the core shaft 1.

[0026] The fixture for grinding the disc scissors also includes a spacer sleeve 2, a screw rod 3 and a locking nut 4. The movable sleeve 220 of the spacer sleeve 2 is arranged on the core shaft 1, and the moving stroke of the spacer sleeve 2 in the area where the adjustment groove 120 is located is at least greater than the thickness of a disc scissors 5, and can be specifically one, two, three, four, five, etc. The screw rod 3 is arranged at the end of the spacer sleeve 2 away from the shaft shoulder 110, and the screw rod 3 is located in the adjustment groove 120. Both ends of the screw rod 3 extend out of the adjustment groove 120, and the two ends of the screw rod 3 are respectively screwed with a locking nut 4. When the locking nut 4 is screwed on the screw rod 3 until it is close to the core shaft 1, the screw rod 3 can be clamped in the adjustment groove 120.

[0027] In this embodiment, the above solution can be further optimized as follows:

[0028] The spacer sleeve 2 includes an adjusting sleeve 210 and a movable sleeve 220. The movable sleeve 220 is sleeved on the core shaft 1. The inner diameter of the movable sleeve 220 is preferably equal to the outer diameter of the core shaft 1. The outer circumferential surface of the movable sleeve 220 at one end close to the shaft shoulder 110 is provided with an external thread. The length of the area of ​​the external thread on the movable sleeve 220 is less than or equal to the thickness of a disc scissors 5. The inner wall of the adjusting sleeve 210 is provided with an internal thread. The adjusting sleeve 210 is sleeved on the end of the movable sleeve 220 provided with the external thread and is screwed together with the movable sleeve 220.

[0029] Part of the outer surface of the locking nut 4 protrudes outward to form a cylindrical extension portion 410. Preferably, part of the outer surface of the locking nut 4 at one end close to the core shaft 1 protrudes outward to form a cylindrical extension portion 410. The end of the movable sleeve 220 close to the locking nut 4 is provided with an arc-shaped bayonet 221 matching the extension portion 410. The arc-shaped bayonet 221 runs through the entire wall surface of the movable sleeve 220. The central angle of the arc-shaped bayonet 221 is less than 180°, and can specifically be 30°, 45°, 60°, 75°, 90°, 120° or 150°.

[0030] The radial cross-section of the adjustment sleeve 210 is a regular hexagon. If it is a regular hexagon, it is convenient to use a tool such as a wrench to rotate the adjustment sleeve 210;

[0031] Alternatively, the outer circumferential surface of the adjusting sleeve 210 is provided with anti-skid patterns. If the anti-skid patterns are provided, it is convenient to manually rotate the adjusting sleeve 210.

[0032] Typically, the diameter of the screw rod 3 is equal to or slightly smaller than the width of the adjusting groove 120 . If it is slightly smaller than , the diameter of the screw rod 3 is within 2 mm smaller than the width of the adjusting groove 120 , and specifically can be 0.5 mm, 1 mm or 1.5 mm.

[0033] In this embodiment, the circular scissors 5 and the core shaft 1 are also positioned by means of a guide key, and a groove matching the guide key 6 is provided on the movable sleeve 220 .

[0034] When using:

[0035] Put multiple disc scissors 5 to be repaired on the core shaft 1, and use the guide key to position the disc scissors 5 and the core shaft 1, then put the spacer 2 on the core shaft 1, and install the screw 3 into the adjustment groove 120, and install a locking nut 4 at both ends of the screw 3, then move the spacer 2 to the disc scissors 5 farthest from the shoulder 110, move the screw 3 to a suitable position, screw the two locking nuts 4, so that the locking nuts 4 are both close to the core shaft 1, and let the spacer 2, with the cooperation of the screw 3 and the locking nut 4, close to the disc scissors 5 farthest from the shoulder 110, so that the disc scissors 5 can be clamped. When the number of disc scissors 5 changes, the position of the screw 3 in the adjustment groove 120 can be changed to achieve the clamping of different numbers of disc scissors 5.

[0036] If there is slight looseness, the adjusting sleeve 210 can be rotated to move the adjusting sleeve 210 toward the direction close to the circular scissors 5 , and the overall length of the spacer sleeve 2 will be increased, so that the circular scissors 5 can be further clamped.

[0037] When all the circular scissors 5 are clamped, the extension 410 of the locking nut 4 is located in the arc-shaped bayonet 221, which can further prevent the movable sleeve 220 and the core shaft 1 from rotating relative to each other, thereby ensuring the overall stability.

[0038] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fixture for grinding circular scissors, comprising a mandrel (1), wherein a shoulder (110) is provided on the outer circumferential surface of the mandrel (1), characterized in that: An adjustment groove (120) passing through the axis of the mandrel (1) and penetrating the mandrel (1) is provided on the mandrel (1) along the axis of the mandrel (1), the left end of the adjustment groove (120) extending to near the shaft shoulder (110), and the right end of the adjustment groove (120) extending to near the right end of the mandrel (1); It also includes a spacer (2), a screw (3) and a locking nut (4), wherein the movable sleeve (220) of the spacer (2) is arranged on the core shaft (1), the screw (3) is arranged at one end of the spacer (2) away from the shaft shoulder (110), and the screw (3) is located in the adjustment groove (120), both ends of the screw (3) extend out of the adjustment groove (120) and are respectively screwed with one of the locking nuts (4), and when the locking nut (4) is screwed on the screw (3) until it is close to the core shaft (1), the screw (3) is clamped in the adjustment groove (120); The spacer sleeve (2) comprises an adjusting sleeve (210) and a movable sleeve (220), wherein the movable sleeve (220) is sleeved on the core shaft (1), and an external thread is provided on the outer circumferential surface of one end of the movable sleeve (220) close to the shaft shoulder (110), and the length of the area of ​​the external thread provided on the movable sleeve (220) is less than or equal to the thickness of a circular scissors (5), and an internal thread is provided on the inner wall of the adjusting sleeve (210). The adjusting sleeve (210) is sleeved on one end of the movable sleeve (220) provided with the external thread and is screwed together with the movable sleeve (220).

2. A fixture for grinding circular scissors according to claim 1, characterized in that: Part of the outer surface of the locking nut (4) protrudes outward to form a cylindrical extension portion (410), and an arc-shaped bayonet (221) matching the extension portion (410) is provided at one end of the movable sleeve (220) close to the locking nut (4), and the central angle of the arc-shaped bayonet (221) is less than 180°.

3. A fixture for grinding circular scissors according to claim 2, characterized in that: The radial cross-section of the adjustment sleeve (210) is a regular hexagon; or, the outer circumferential surface of the adjustment sleeve (210) is provided with anti-slip grooves.

4. A circular scissors grinding fixture according to any one of claims 1 to 3, characterized in that: The diameter of the screw rod (3) is equal to or slightly smaller than the width of the adjustment groove (120).

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