Displacement amount measurement jig and centering method for peeling machine

Abstract

To provide a displacement amount measuring jig capable of easily performing centering work in a peeling machine.SOLUTION: A displacement amount measuring jig 20 includes: an attached portion 21; a cylindrical holding tube 25 formed integrally with the attached portion 21; and a measuring function portion 40 held by the holding tube 25. The measuring function portion 40 includes: a support member 41 that fits into the holding tube 25 in a manner of penetrating the holding tube 25 in an axial direction; a probe 47 that is held at one end of the support member 41 slidably in an axial-orthogonal direction that is perpendicular to the axial direction of the holding tube 25; a conversion member 55 that converts a displacement amount in the axial-orthogonal direction into a displacement amount in the axial direction; a transmission shaft 52 that transmits the axial displacement amount to the other end of the support member 41; and a dial gauge 65 that is attached to the other end of the support member 41 and outputs the axial displacement amount that is input via the transmission shaft 52.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a displacement measuring jig and a centering method for a peeling machine using the same. [Background technology]

[0002] In the process of manufacturing bar-shaped steel materials (hereinafter simply referred to as bar materials), peeling machines are used to cut the outer periphery of the bar materials. FIG. 8 is a diagram schematically illustrating the general configuration of a conventional peeling machine. The peeling machine 1 shown in the figure includes, in this order, a feed roller 2 as an upstream conveying device that feeds the bar material W downstream at a constant speed in the conveying direction of the bar material W; an upstream guide support device 4 that has a plurality of guide rollers 5 along the outer periphery of the bar material W to center the bar material W and support a cutting reaction force; a cutting machine 6 that cuts the outer periphery of the bar material W by rotating a plurality of cutting blades 7, which are circumferentially spaced apart along the outer periphery of the bar material W, around a processing central axis O1; a downstream guide support device 10 that has a plurality of guide rollers 11 along the outer periphery of the bar material W to center the bar material W and support a cutting reaction force; and a carriage 12 as a downstream conveying device. The carriage 12 pinches the bar W and pulls it out downstream in the conveying direction when the rear end of the bar W passes the feed roller 2 and can no longer be conveyed. A peeling machine with such a configuration is described, for example, in Patent Document 1 listed below.

[0003] In order to improve the roundness of the bar W after processing in such a peeling machine 1, it is necessary to suppress misalignment between the rotation axis (processing central axis O1) of the cutting machine 6 and the bar W that is centered by the guide rollers 5, 11 of the guide support devices 4, 10. However, if the wear of each guide roller 5, 11 is uneven, it may become impossible to maintain a sufficient centering state. The centering state of the downstream guide support device 10 is particularly important.

[0004] 9 is an explanatory diagram of the centering operation in the downstream guide support device. Conventionally, the centering operation in the downstream guide support device 10 has been performed in the following procedure. (1) First, the bar material W1 for calibration is gripped by the guide rollers 11. (2) A dial gauge 15 is attached to the cutter head 8 of the cutting machine 6, and the cutter head 8 is rotated to measure the eccentricity of the bar material W1 relative to the processing center axis O1. (3) The bar material W1 is temporarily removed, and (4) the position of the guide rollers 11 is adjusted based on the measured eccentricity. (5) Thereafter, the bar material W1 is gripped by the guide rollers 11 again, and (6) the eccentricity of the bar material W1 after adjustment is measured using the dial gauge 15. Thereafter, the above steps (3) to (6) are repeated until the eccentricity of the bar material W1 falls within the specified range. This type of centering work depends on the skill level of the worker because it is not clear which guide rollers need to be adjusted and by how much. It is also difficult to predict the time required for the centering work, making it difficult to avoid the workload and increased work time associated with the centering work. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-200301 Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a displacement measuring jig that can easily perform centering work in a peeling machine, and a centering method using this jig. [Means for solving the problem]

[0007] The displacement measuring jig according to the first aspect of the present invention is defined as follows: The measuring device comprises an attachment portion to be attached to a mating device, a cylindrical holding tube integral with the attachment portion, and a measuring function portion held by the holding tube, The measurement function unit includes: a support member that is fitted into the holding tube in a manner that penetrates the holding tube in the axial direction; a measuring element held at one end of the support member so as to be slidable in an axially orthogonal direction perpendicular to the axial direction of the holding tube; a conversion member for converting a displacement amount in the direction perpendicular to the axis into a displacement amount in the axial direction; a transmission shaft disposed inside the support member and configured to transmit the axial displacement converted by the conversion member to the other end of the support member; and a displacement output means attached to the other end of the support member for outputting the axial displacement input via the transmission shaft.

[0008] According to the displacement measuring jig of the first aspect defined in this way, the amount of displacement in the direction perpendicular to the axis measured at one end of the measuring function unit can be output at the other end of the measuring function unit opposite the one end with the mounting part sandwiched between them. If such a displacement measuring jig is used in the centering work of a peeling machine, it becomes possible to directly measure the variation in the position of each guide roller in the direction perpendicular to the axis, which is located downstream of the cutter head in the conveying direction, and the centering work can be performed more easily than with the conventional centering method that uses a calibration rod.

[0009] Here, the measurement function unit can be made slidable in the axial direction of the holding tube (second aspect). In this way, by moving the measurement function unit relatively in the axial direction, it is possible to easily measure the displacement of a measurement object (e.g., a guide roller) at a different position in the axial direction.

[0010] A centering method for a peeling machine according to a third aspect of the present invention is defined as follows: A centering method for a peeling machine including a cutting machine having a cutter head that rotates around a processing center axis and that cuts the outer peripheral surface of a bar stock as a workpiece, and a guide support device that centers the bar stock using a plurality of guide rollers that are arranged at intervals in the circumferential direction, comprising: attaching the displacement amount measuring jig according to the first aspect to the cutter head; rotating the cutter head to measure the positions of the plurality of guide rollers arranged in the circumferential direction on the downstream side of the cutter head in the conveying direction relative to the processing central axis in a direction perpendicular to the axis, and adjusting the positions of the guide rollers so that the variation in the positions of the plurality of guide rollers in the direction perpendicular to the axis falls within a predetermined range; Equipped with. According to the centering method for a peeling machine of the third aspect defined as above, it is possible to directly measure the variation in the position of each guide roller located downstream of the cutter head in the direction perpendicular to the axis using a displacement measuring jig, and the centering work can be performed more easily than in the conventional centering method using a calibration rod. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a front view of a displacement amount measuring jig according to an embodiment of the present invention. [Figure 2] 2 is a perspective view of the displacement measuring jig of FIG. 1 separated into a holding tube and a measuring function part. FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along the line III-III in FIG. [Figure 4] 4A is an enlarged view of the probe and its surrounding area in FIG. 3. FIG. 4B is a cross-sectional view taken along the line BB in FIG. [Figure 5] 10A and 10B are explanatory diagrams of a centering operation using the displacement amount measuring jig of the same embodiment. [Figure 6] FIG. 6 is an explanatory diagram of the centering operation following FIG. 5. [Figure 7] FIG. 7 is an explanatory diagram of the centering operation following FIG. 6. [Figure 8] FIG. 1 is a diagram illustrating a schematic configuration of a peeling machine. [Figure 9] FIG. 10 is an explanatory diagram of a conventional centering operation. DETAILED DESCRIPTION OF THE INVENTION

[0012] Next, an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a front view of a displacement measuring jig according to an embodiment of the present invention. Fig. 2 is a perspective view of the displacement measuring jig of Fig. 1 separated into a holding tube and a measuring function part. Fig. 3 is a cross-sectional view taken along III-III in Fig. 1. The displacement measuring jig 20 shown in FIG. 1 is used in the centering operation of a peeling machine to measure the position of the guide roller in the direction perpendicular to the axial direction relative to the processing center axis, and is equipped with an attachment part 21 that is attached to the cutter head of the peeling machine, a cylindrical holding tube 25 that is integral with the attachment part 21, and a measuring function part 40 that is held by the holding tube 25.

[0013] The holding tube 25 is a cylindrical member with a large diameter portion 27a on the right side and a small diameter portion 27b on the left side in Fig. 1. As shown in Fig. 2, the large diameter portion 27a of the holding tube 25 is integrally provided with a plurality of (four in this example) mounting portions 21 at different positions in the circumferential direction. The mounting portion 21 has a rectangular column portion 22 extending outward from the large diameter portion 27a, and a cylindrical portion 23 protruding from there in the axial direction toward the small diameter portion 27b, with a female screw hole 23a opening toward the small diameter portion 27b formed in the cylindrical portion 23. These mounting portions 21 can be attached to the cutter head of a peeling machine in place of a cutting blade and a tool holder.

[0014] Furthermore, inside the holding tube 25, a hollow hole 26 is provided that penetrates in the axial direction (X direction in the drawing), and this hollow hole 26 holds a measuring function part 40 (specifically, a first support member 41A) described below.

[0015] A stopper member 29 and a push screw member 30 are attached to the holding tube 25 near the open end on the small diameter portion 27b side. As shown in FIG. 3, the stopper member 29 is threaded into a female threaded hole 28 that penetrates the peripheral wall of the small diameter portion 27b, and its tip, which protrudes inward from the inner peripheral surface of the small diameter portion 27b, engages with a guide groove 44 formed on the outer peripheral surface of the support member 41, which will be described later, to prevent relative rotation of the support member 41.

[0016] On the other hand, the press screw member 30 is threaded into a female thread hole 31 (see FIG. 1) formed in the small diameter portion 27b at a position 90° circumferentially different from the female thread hole 28. When the press screw member 30 is screwed in, its tip presses the support member 41, restricting axial movement of the support member 41. Conversely, when the press screw member 30 is loosened, the pressure is released, allowing the support member 41 to move in the axial direction.

[0017] Next, a description will be given of the measuring function unit 40. The measuring function unit 40 includes a support member 41, a measuring element 47, a conversion member 55, a transmission shaft 52, and a dial gauge 65 as a displacement amount output means.

[0018] The support member 41 is composed of a first support member 41A held by the holding tube 25, and a second support member 41B that is located to the left of the first support member 41A in the figure and has a smaller diameter than the first support member 41A. The first support member 41A and the second support member 41B are connected together by fastening flanges formed on their respective ends together.

[0019] The first support member 41A is a cylindrical member that is approximately concentric with the central axis O of the hollow hole 26 when fitted inside the holding tube 25, and its outer diameter is specified so that it can slide in the axial direction (X direction in the figure) relative to the holding tube 25. Here, three marking lines 43a, 43b, and 43c are provided on the outer peripheral surface of the first support member 41A at intervals in the axial direction (see FIG. 2). By relatively moving the first support member 41A in the axial direction so that one of these marking lines overlaps with the opening edge 32 of the holding tube 25, the probe 47 can be brought to a position where it can come into contact with the desired measurement object (e.g., a guide roller). Furthermore, the guide groove 44 that engages with the stopper member 29 as described above is formed on the outer peripheral surface of the first support member 41A in a manner that extends in the axial direction.

[0020] A probe 47 is disposed on one end side (right side in the figure) of the first support member 41A. As shown in Fig. 4, this probe 47 has an abutment portion 48 and a shaft portion 50. The abutment portion 48 has a square plate shape when viewed from the front, and its outer surface 48a abuts against the circumferential surface of the guide roller 11, which is the object to be measured. This outer surface 48a is curved in a predetermined direction so as to be in point contact with the circumferential surface of the guide roller 11 (see Fig. 4(B)).

[0021] Shank 50 has a cylindrical shape, is supported by guide hole 45 that penetrates the peripheral wall of first support member 41A, and is slidable in an orthogonal direction (Z direction in the figure) that is perpendicular to the axial direction (X direction in the figure) of holding tube 25. The end of shaft 50 opposite abutment portion 48 has a smaller diameter than the other portions of shaft 50 and is able to abut against conversion member 55. Also, as shown in FIG. 4(B), a groove 51 is formed in the outer peripheral surface of shaft 50 along the axial direction (Z direction in the figure). By engaging the tip of stopper member 61 with groove 51, the movement range of probe 47 is restricted and probe 47 is prevented from falling out of guide hole 45.

[0022] 3, a transmission shaft 52 is disposed in a hollow portion 42 formed across the first support member 41A and the second support member 41B that constitute the support member 41. The transmission shaft 52 is a rod-shaped member that is held slidably in the axial direction (X direction in the figure) by guide members 46 that are provided at multiple locations on the support member 41. An end member 53 that can come into contact with the conversion member 55 is fixed to the end of the transmission shaft 52 on the conversion member 55 side.

[0023] As described above, in this example, the probe 47 and the transmission shaft 52 are connected via the conversion member 55. As shown in Fig. 4(A), the conversion member 55 is a member provided rotatably around the pivot pin 56 fixed to the first support member 41A, and is provided with a first contact portion 57a ​​that contacts the probe 47 at the tip end extending from the pivot pin 56 in the upper right direction in the figure, and a second contact portion 57b that contacts the transmission shaft 52. The first contact portion 57a ​​and the second contact portion 57b are formed at the same distance from the center of the pivot pin 56.

[0024] In this embodiment, the transmission shaft 52 is biased toward the conversion member 55 by a spring member 60 (see FIG. 3), thereby maintaining the contact state between the transmission shaft 52 and the conversion member 55 and the contact state between the conversion member 55 and the probe 47. In this state, the outer surface 48a of the probe 47 is set at a reference position spaced a distance L from the central axis O in the direction perpendicular to the axis (see FIG. 4(A)). 4(A) in the direction perpendicular to the axis (Z direction in the figure), the direction of the displacement is converted by the conversion member 55 into the axial direction (X direction in the figure) and transmitted to the transmission shaft 52. In this example, the ratio of the amount of displacement of the conversion member 47 in the direction perpendicular to the axis (Z direction in the figure) to the amount of displacement in the axial direction (X direction in the figure) after conversion by the conversion member 55 is 1:1.

[0025] 3, a dial gauge 65 serving as a displacement amount output means is attached to the other end (left side in the figure) of the support member 41. More specifically, the dial gauge 65 is attached via a screw member 64 to a cap 63 that is screwed onto the end of the support member 41. At this time, a spindle 66 of the dial gauge 65 abuts against the end of the transmission shaft 52 on the left side in the figure, and the dial gauge 65 outputs the amount of axial displacement input via the transmission shaft 52.

[0026] In the displacement measuring jig 20 of this embodiment configured as described above, by setting the scale of the dial gauge 65 to indicate the zero point at an appropriate reference position spaced apart in the direction perpendicular to the axis from the central axis O (for example, a position spaced apart by the distance L shown in Figure 4(A)), the displacement in the direction perpendicular to the axis of the measurement object (guide roller) located farther away from the attached portion 21 relative to the reference position can be easily read using the dial gauge 65 located closer to the attached portion 21.

[0027] Next, a centering method for a peeling machine using the displacement amount measuring jig 20 will be described. In Fig. 5, 8 denotes a cutter head to which a cutting blade and a tool holder are attached, and 9 denotes a main shaft that rotates the cutter head 8. The cutter head 8 and main shaft 9 that constitute the cutting machine 6 rotate around a processing center axis O1. Reference numeral 10 denotes a downstream guide support device arranged inside the main shaft 9. In this downstream guide support device 10, guide roller groups each having guide rollers 11 at three locations in the circumferential direction are provided at three locations spaced apart in the axial direction. In other words, the downstream guide support device 10 has a total of nine guide rollers 11.

[0028] When performing the centering work, first remove the cutting blade and tool holder that were attached to the tool mounting portion 8a of the cutter head 8, and then fasten and fix the mounting portion 21 of the displacement measuring jig 20 to the tool mounting portion 8a of the cutter head 8 in place of them. At this time, the tolerance of the large diameter portion 27a of the displacement measuring jig 20 and the guide hole portion 8b of the cutter head 8 (see Figure 5), which fit together, is set to be small so as to obtain the desired coaxiality, and the displacement measuring jig 20 is attached so that the rotation axis (machining center axis O1) of the cutter head 8 and the center axis O of the displacement measuring jig 20 are coaxial.

[0029] Next, the measuring function unit 40 is moved relatively in the axial direction (X direction in the drawing) so that the marking line 43c (see FIG. 2) on the outer peripheral surface of the first support member 41A overlaps with the opening edge 32 of the holding tube 25, and the probe 47 is moved to a position where it is possible to measure the group of guide rollers farthest from the cutter head 8. After the movement, the push screw member 30 (see FIG. 1) is screwed in to restrict the movement of the measuring function unit 40.

[0030] When the cutter head 8 is rotated, as shown in Figure 6, the displacement measuring jig 20 rotates together with the cutter head 8 around the processing center axis O1, and the position of each guide roller 11 in the direction perpendicular to the axis is output to the dial gauge 65 as displacements δ1, δ2, and δ3 relative to a locus L1 of a reference position that is separated by a distance L from the processing center axis O1, which has been appropriately determined in advance. Then, the positions of the guide rollers 11 are adjusted so that the variations in the measured displacement amounts δ1, δ2, and δ3 fall within a predetermined range.

[0031] After completing the adjustment of the above guide roller group, as shown in Figure 7, the measurement function unit 40 is moved relatively in the axial direction, and the position of each guide roller for the next guide roller group is adjusted so that the variation in the measured displacement amount falls within a predetermined range. The above process is repeated for each group of guide rollers, and the position of each guide roller 11 is adjusted so that the variations in the displacement amounts δ1, δ2, δ3, etc. of all nine guide rollers 11 arranged in the downstream guide support device 10 fall within a specified range, and then the centering process for the downstream guide support device 10 is completed.

[0032] As described above, according to the centering method using the displacement measuring jig 20 of this embodiment, it is possible to individually check the amount of misalignment (displacement) of all nine guide rollers arranged inside the downstream guide support device 10. This makes it clear which guide roller is misaligned and how much it is misaligned, making it possible to easily perform the centering work regardless of the skill level of the worker.

[0033] Although the embodiment of the present invention has been described in detail above, this is merely an example. For example, the shape of the mounting portion can be changed as appropriate depending on the shape of the mating device (the shape of the cutter head in a cutting machine). Furthermore, the displacement amount output means for outputting the displacement amount can be something other than a dial gauge. For example, the present invention can be configured in various modified forms within the scope of its spirit. [Explanation of symbols]

[0034] 1 Peeling machine (other device) 6 Cutting machine 8 cutter head 10. Downstream guide support device 11 Guide roller 20 Displacement measurement jig 21 Mounting part 25 Holding tube 40 Measurement function section 41 Support member 47 Probe 52 Transmission shaft 55 Conversion member 65 Dial gauge (displacement output means) O1 Machining center axis (rotation axis) O center axis δ1, δ2, δ3 Displacement

Claims

1. The measuring device comprises an attachment portion to be attached to a mating device, a cylindrical holding tube integral with the attachment portion, and a measuring function portion held by the holding tube, The measurement function unit includes: a support member that is fitted into the holding tube in a manner that penetrates the holding tube in the axial direction; a measuring element held at one end of the support member so as to be slidable in an axially orthogonal direction perpendicular to the axial direction of the holding tube; a conversion member for converting a displacement amount in the direction perpendicular to the axis into a displacement amount in the axial direction; a transmission shaft disposed inside the support member and configured to transmit the axial displacement converted by the conversion member to the other end of the support member; a displacement output means attached to the other end of the support member for outputting the axial displacement input via the transmission shaft.

2. 2. The displacement measuring jig according to claim 1, wherein the measuring function portion is held slidably in the axial direction of the holding tube.

3. A centering method for a peeling machine including a cutting machine having a cutter head that rotates around a processing center axis and that cuts the outer peripheral surface of a bar stock as a workpiece, and a guide support device that centers the bar stock using a plurality of guide rollers that are arranged at intervals in the circumferential direction, comprising: a step of attaching the displacement amount measuring jig according to claim 1 to the cutter head; rotating the cutter head to measure the positions of the plurality of guide rollers arranged in the circumferential direction on the downstream side of the cutter head in the conveying direction relative to the processing central axis in a direction perpendicular to the axis, and adjusting the positions of the guide rollers so that the variation in the positions of the plurality of guide rollers in the direction perpendicular to the axis falls within a predetermined range; A centering method for a peeling machine comprising:

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