Rolling device

Abstract

To provide a rolling device that can easily perform correction of relative position between a fixed flat die and a moving flat die.SOLUTION: A rolling device 1 comprises: control content that forms a fixed side streak and a moving side streak on a base material to obtain a test piece; and control content that receives input of a positional deviation amount between a virtual groove center line of the fixed side streak and a groove center line of the moving side streak, and calculates and outputs a correction movement amount to correct a moving flat die 4 to a top dead center on the basis of the positional deviation amount. Further, the rolling device comprises control content that receives and outputs input of a biting depth of the fixed side streak and the moving side streak of the test piece. According to such configuration, the top dead center of the moving flat die 4 can be positionally adjusted easily on the basis of the positional deviation amount, and an opposite direction position of the fixed flat die 3 can be positionally adjusted easily on the basis of the biting depth.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rolling device used mainly for rolling threads, and to a rolling device capable of correcting the relative position between a fixed flat die and a movable flat die. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there have been known rolling pressure monitoring devices, such as that disclosed in Patent Document 1, that monitor the rolling pressure applied to a base material and determine whether or not rolling has been performed appropriately. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-175576 ​​A Summary of the Invention [Problem to be solved by the invention]

[0004] In a rolling device, the relative positions of the fixed flat die and the moving flat die must be precise. Specifically, the trace of plastic deformation formed on the fixed flat die side must match the trace of plastic deformation formed on the moving flat die side. In particular, in the case of thread rolling, if the trace of plastic deformation is misaligned, the rolled product may not be viable as a product.

[0005] Conventionally, the correction of the positions of the fixed flat die and the movable flat die has relied heavily on skilled personnel, and even then, multiple tests have had to be repeated.

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a rolling device that can easily correct the relative positions of a fixed flat die and a movable flat die. [Means for solving the problem]

[0007] The present invention relates to a rolling device including a fixed flat die fixed on a base table and having a fixed-side rolling surface portion, and a movable flat die arranged so as to be freely movable back and forth along a rolling direction on the base table and having a movable-side rolling surface portion that faces the fixed-side rolling surface portion during rolling, the rolling device comprising a top dead center position adjustment means for manually adjusting the position of the top dead center of the movable flat die along the rolling direction, a forward movement of the movable flat die by moving the movable flat die by a predetermined amount along the rolling direction from the position of the top dead center to rotate a base material by half a rotation, and a back movement of the movable flat die by moving the movable flat die to the position of the top dead center. a test movement control means for automatically controlling a return movement of the moving flat die to return it to its original position, thereby obtaining a test piece in which a groove-shaped fixed side streak based on the fixed side rolling surface portion and a groove-shaped moving side streak based on the moving side rolling surface portion are formed on the base material, respectively; and a test movement control means for receiving an input of a positional deviation amount of the moving side streak from the appropriate position in a direction along the axis of the test piece, the positional deviation amount being inputted based on the appropriate position, the positional deviation amount being inputted based on the appropriate position, in a direction along the axis of the test piece, when the test piece is viewed from the front, the groove center line of the moving side streak being located on a virtual groove center line formed by extending the groove center line of the fixed side streak. and a correction movement amount calculation control means having a control content for calculating a distance to an appropriate top dead center position of the moving flat die as a correction movement amount of the moving flat die based on the input position deviation amount. Furthermore, at least one of the fixed flat die and the moving flat die is arranged so as to be position-changeable along an opposing direction in which the fixed side rolling surface portion and the moving side rolling surface portion face each other, and an opposing position adjustment means for manually adjusting the relative positions of the fixed flat die and the moving flat die in the opposing direction, and a facing position detection means for detecting the relative position of the fixed side score and the moving flat die in the facing direction; a penetration input / output means for accepting input of the radial penetration depth of the test piece at the fixed side score and the moving side score of the test piece obtained by the test movement control means; and an adjustment value output means for outputting the correction movement amount calculated by the correction movement amount calculation control means, facing position information based on the relative position in the facing direction detected by the facing position detection means, and the penetration depth accepted as input by the penetration depth input means.

[0008] In this configuration, first, the test movement control means forms a streak in a required range on the base material, and a test piece is obtained in which the streak is composed of a fixed side streak and a moving side streak. Then, the positional deviation amount between the fixed side streak and the moving side streak formed on the test piece is input using the positional deviation amount input means. Then, the correction movement amount calculation control means calculates a correction movement amount to the position of the moving flat die where the appropriate position is obtained, and the calculated correction movement amount is output by the adjustment value output means. Based on this correction movement amount, the top dead center position adjustment means adjusts the position of the top dead center of the moving flat die, so that the position of the top dead center can be made an appropriate position that aligns the fixed side streak and the moving side streak. In the present invention, as the predetermined amount of rotation of the base material to form each streak, a configuration in which the base material is rotated approximately half a turn is proposed. Specifically, the base material may be rotated half a turn, or the base material may be rotated slightly more than half a turn so that the streaks do not overlap excessively and become impossible to measure, or the base material may be rotated slightly less than half a turn so that the streaks do not overlap. Preferably, the base material is rotated slightly less than half a turn so that the streaks do not overlap. In addition, the rotation direction of the base material does not matter, particularly forward or reverse.

[0009] Furthermore, based on the bite depth of the fixed side streaks and the moving side streaks formed on the test piece and the information on the positions of the fixed flat die and the moving flat die when the fixed side streaks and the moving side streaks are formed, the relative positions of the fixed flat die and the moving flat die in the facing direction can be adjusted by the facing position adjustment means to a position where the relative positions in the facing direction are at an appropriate bite depth. Here, the pitch of the thread and the rolling pressure (the pressure by the fixed flat die and the moving flat die during the rolling process) are determined by the bite depth, so that the pitch of the thread can be matched and the rolling pressure can be optimized by setting the bite depth at an appropriate level. As a result, the pitch of the thread can be matched with high accuracy, so that the occurrence of defective pitch formation can be suppressed, and the rolling process can be performed with an appropriate rolling pressure, so that the occurrence of slippage during the rolling process can be suppressed, and the occurrence of defective formation due to the slippage can be suppressed. By setting the bite depth at an appropriate level in this way, the probability of defective formation during the rolling process (hereinafter referred to as the defective formation rate) can be reduced.

[0010] In this way, the configuration of the present invention can improve the thread rolling accuracy and reduce the defective rate by adjusting the position of the top dead center of the moving flat die and the relative position of the moving flat die and the fixed flat die in the facing direction based on the fixed side streaks and the moving side streaks formed on the test piece. In this configuration, the position of the top dead center of the moving flat die can be adjusted according to the correction movement amount, and the relative position in the facing direction can be adjusted by the facing position information and the bite depth, so that such adjustments can be made without relying on the experience or intuition of the worker, and the burden required for the adjustment work can be reduced. Therefore, the thread can be stably formed to the desired product standard with high precision, and high-quality threads can be stably manufactured.

[0011] In the rolling device of the present invention described above, a configuration is proposed in which the adjustment value output means has a control content for displaying the penetration depth inputted by the penetration depth input means on a specified display unit, and a control content for sequentially displaying the opposing position information on the display unit in accordance with position adjustment of the moving flat die in the opposing direction by the opposing position adjustment means.

[0012] In this configuration, the relative positions of the fixed flat die and the movable flat die in the facing direction are adjusted by the facing position adjustment means based on the bite depth and facing position information displayed on the display unit, so that the relative positions can be adjusted to a position that provides a desired bite depth. In this way, the positions can be easily and stably adjusted to the relative positions that provide a bite depth suitable for the desired product specifications.

[0013] In addition, in this configuration, the adjustment value output means may be equipped with a corrected position information calculation means for calculating corrected position information indicating the relative position in the opposing direction which results in the desired penetration depth based on the penetration depth inputted by the penetration depth input means and the opposing position information when the fixed side striations and the moving side striations are formed on the test piece, and the configuration may be equipped with control content for displaying the corrected position information on the display unit. According to this configuration, by operating the opposing position adjusting means in accordance with the corrected position information, the position can be adjusted more easily and stably to the desired biting depth.

[0014] In the rolling device of the present invention described above, a configuration is proposed in which the adjustment value output means displays a movement amount corresponding graphic portion on a specified display portion, and the correction movement amount calculation control means generates the movement amount corresponding graphic portion corresponding to the correction movement amount along directions perpendicular to the rolling direction of the moving flat die and the opposing directions of the fixed side rolling surface portion and the moving side rolling surface portion, and outputs the generated movement amount corresponding graphic portion to the adjustment value output means.

[0015] The movement amount corresponding figure portion is displayed, for example, as a bar-shaped figure extending to the left and right with the center at the correct position, and the amount of deviation of the current position of the movable flat die from the correct position is indicated within the figure, and the figure showing the current position is matched with the figure showing the correct position by moving the movable flat die. This allows the worker to work very easily based on visual information. The movement corresponding figure portion can take various forms. Effect of the Invention

[0016] The rolling device of the present invention has the excellent effect of being able to easily correct the relative positions of the fixed flat die and the movable flat die. [Brief description of the drawings]

[0017] [Figure 1] 1 is a perspective view showing a rolling device 1 of an embodiment according to the present invention, viewed from the side of a fixed flat die 3. FIG. [Diagram 2] FIG. 2 is a perspective view showing the rolling device 1 from the movable flat die 4 side. [Diagram 3] FIG. 2 is an enlarged plan view of a fixed flat die 3. [Figure 4] 1 is an explanatory diagram showing a mode in which fixed-side marks 62 and moving-side marks 63 are formed on a base material 60. FIG. [Diagram 5] 1A is an enlarged view of a portion of a test piece 61, and FIG. 1B is an enlarged view of a portion of the longitudinal section thereof. [Figure 6] 2 is a schematic diagram showing a position detection device 35 that detects the positions of a fixed flat die 3 and a moving flat die 4. FIG. [Figure 7] 11 is an explanatory diagram showing a display mode of a correction graphic portion 81 on the touch panel 37. FIG. [Figure 8] 13 is an explanatory diagram showing a display mode of penetration depth and opposing position information on a touch panel 37. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The present invention will be described in detail with reference to the following examples. Note that the present invention is not limited to the following examples, and appropriate design changes are possible.

[0019] As shown in Figs. 1 and 2, the rolling device 1 is equipped with a base table 2. On the base table 2, a fixed flat die 3 having a fixed side rolling surface portion 11 and a movable flat die 4 having a movable side rolling surface portion 21 are provided. The movable flat die 4 moves back and forth along the rolling direction. While the rolling device 1 is not operating, the movable flat die 4 is stopped at a standby position before rolling is performed. Specifically, as shown in Figs. 1 and 2, this standby position is a position separated from the fixed flat die 3 in the rolling direction, and is different from the rolling start position (top dead center) described later.

[0020] In this embodiment, a direction perpendicular to the rolling direction and in which the fixed side rolling surface section 11 and the movable side rolling surface section 21 face each other will be described as an opposing direction (see Figs. 1 and 2).

[0021] The fixed flat die 3 is fixed to the die block 25 by a clamping means (not shown). The die block 25 is fastened to the base table 2 by fastening bolts 10, 10, and with the fastening bolts 10, 10 fastened, the die block 25 and the fixed flat die 3 are immovably fixed to the base table 2.

[0022] The movable flat die 4 is provided so as to be immovable in the vertical and horizontal directions, and is provided so as to be movable back and forth in the rolling direction by a guide rail (not shown) provided on the base table 2 along the rolling direction. A drive control device (not shown) is provided on the base table 2, and the reciprocating movement of the movable flat die 4 is controlled by the drive control device.

[0023] As described above, when the rolling device 1 is not in operation, the movable flat die 4 is stopped at the standby position located on one side of the rolling direction relative to the fixed flat die 3 (FIGS. 1 and 2), and is moved to the top dead center (described below) when rolling begins (FIG. 4(A)). During rolling, the movable flat die 4 is moved back and forth from the top dead center along the rolling direction, and after rolling is completed, the movable flat die 4 returns to the standby position. In addition, the configuration of this embodiment is provided with a correction bolt 8 for adjusting the position of the top dead center (position along the rolling direction) of the movable flat die 4 (FIG. 2), and the position of the top dead center of the movable flat die 4 can be freely adjusted along the rolling direction by rotating the correction bolt 8 forward or backward.

[0024] Further, a guide path section 19 is provided on one side of the fixed flat die 3 for feeding the base material 60 between the fixed flat die 3 and the movable flat die 4. The rolling device 1 of this embodiment rolls the base material 60 fed by the guide path section 19 by squeezing it between the fixed side rolling surface section 11 of the fixed flat die 3 and the movable side rolling surface section 21 of the movable flat die 4, and moves the movable flat die 4 back and forth in the rolling direction. In the rolling device 1 of this embodiment, a male thread is formed by rolling a substantially round bar-shaped base material.

[0025] In this embodiment, the configuration for reciprocating the movable flat die 4 (guide rails, drive control device, etc.), the fixed side rolling surface forming unit 11, and the movable side rolling surface forming unit 21, etc. can be configured as conventionally known, so details thereof will be omitted.

[0026] Next, the main part of the present invention will be described. 1 and 2, in this embodiment, a block position reference portion 26 is provided on the base table 2 to which the die block 25 is attached so as to be movable in the opposing direction. The die block 25 is movable in the opposing direction relative to the block position reference portion 26 (base table 2) when the fastening bolts 10, 10 are loosened, and can slide in the opposing direction in this state. As a result, when the fixed flat die 3 is fixed to the die block 25, the fixed flat die 3 and the die block 25 can be moved together in the opposing direction.

[0027] The block position reference portion 26 is provided with position conversion drawing bolts 31, 31 at locations near both ends in the rolling direction. Position conversion press bolts 32, 32 arranged side by side above and below are provided at locations on both ends of each position conversion drawing bolt 31. The position conversion drawing bolts 31 and the position conversion press bolts 32 are provided along the opposing directions.

[0028] The position conversion drawing bolt 31 is rotatably attached to the block position reference portion 26, and its tip protrudes toward the die block 25 beyond the block position reference portion 26 and is screwed into the die block 25. By rotating this position conversion drawing bolt 31 in one direction (for example, to the left), the die block 25 can be moved in the opposing direction away from the movable flat die 4. Each position conversion drawing bolt 31 can be rotated individually, and by rotating each of them, the positions near both ends in the rolling direction of the die block 25 (fixed flat die 3) can be changed to the opposing direction away from the movable flat die 4.

[0029] The position changing press bolt 32 is rotatably attached to the block position reference portion 26, and its tip portion protrudes toward the die block 25 beyond the block position reference portion 26 and abuts against the die block 25. By rotating this position changing press bolt 32 in one direction (for example, to the right), the die block 25 can be pressed and moved in a direction approaching the movable flat die 4 in the opposing direction. Each position changing press bolt 32 can be rotated individually, and by rotating each of them, the positions near both ends in the rolling direction of the die block 25 (fixed flat die 3) can be changed to the respective positions in the opposing direction approaching the movable flat die 4.

[0030] Furthermore, since a commonly used mechanism can be applied as the mechanism for adjusting the position of the die block 25 (fixed flat die 3) in the opposing direction by appropriately rotating the two position change pull-out bolts 31 and the four position change press bolts 32, details thereof will be omitted.

[0031] Furthermore, in the block position reference section 26, opposing position detection sensors 33, 33 are disposed at the positions near both ends in the rolling direction to detect the opposing positions (hereinafter referred to as opposing direction positions) of the die block 25 (fixed flat die 3) (see FIG. 6). These opposing position detection sensors 33, 33 detect the positions near both ends in the rolling direction of the fixed flat die 3, respectively. This makes it possible to detect the opposing positions of the positions near both ends of the fixed flat die 3, respectively.

[0032] In this embodiment, the fixed flat die 3 is provided so as to be slidable in the rolling direction relative to the block position reference portion 26 when the fastening bolts 10, 10 are loosened. An adjustment bolt (not shown) for changing the position of the fixed flat die 3 in the rolling direction is provided on the block position reference portion 26, and the fixed flat die 3 can be slid in the rolling direction by rotating the adjustment bolt. A rolling position detection sensor 34 for detecting the position of the fixed flat die 3 in the rolling direction (hereinafter referred to as the rolling direction position) is provided on the block position reference portion 26 (see FIG. 6).

[0033] In this manner, with the fastening bolts 10, 10 loosened, the fixed flat die 3 of this embodiment can be changed in position in the opposing direction by rotating the position change drawing bolt 31 and the position change pressing bolt 32, and can also be changed in position in the rolling direction by rotating the adjustment bolt. Then, the fixed flat die 3 can be positioned and fixed by fastening the fastening bolts 10, 10.

[0034] 6, the rolling device 1 of this embodiment is provided with a position detection device 35 having the opposing position detection sensors 33, 33 and the rolling position detection sensor 34. The position detection device 35 is provided with a control PC 36 and a touch panel 37, and signals detected by the opposing position detection sensors 33, 33 and the rolling position detection sensor 34 are input to the control PC 36. The control PC is provided with a central control device and a storage device, and controls the display of the touch panel 37.

[0035] The position detector 35 further includes a top dead center detection sensor 39 for detecting the position of the top dead center of the movable flat die 4, and a signal detected by the top dead center detection sensor 39 is input to the control PC 36. The top dead center detection sensor 39 is provided for detecting the top dead center (the starting position of the rolling process) of the movable flat die 4 where the rolling process starts, and is disposed on the base table 2.

[0036] The storage device of the control PC 36 stores in advance product standard information (information on nominal diameter, pitch, etc.) of the thread to be rolled, and various programs for calculating the conditions of the rolling process based on this standard information. Specific programs stored in the storage device include a program for calculating the amount of reciprocating movement of the movable flat die 4, a program for calculating a correction amount of movement for correcting the position of the top dead center of the movable flat die 4, and a program for calculating corrected position information of the opposing direction position of the fixed flat die 3.

[0037] Here, the program for calculating the reciprocating movement amount of the movable flat die 4 calculates the reciprocating movement amount based on the outer diameter data of the product standard information. The program for calculating the correction movement amount of the top dead center calculates the correction movement amount based on the nominal diameter and pitch information of the product standard information and the input information input by the operator. The input information is information inputted by the touch panel 37 as described later, and indicates the screw direction, information on the height of the movable flat die 4, and the positional deviation amount P, etc., and is data actually measured from the test piece 61 described later. In this program, the correction movement amount is calculated using the nominal diameter and pitch of the product standard information, the positional deviation amount P inputted by the operator as described later, the information on the height of the movable flat die 4 also inputted, and pi. By operating the correction bolt 8 according to the correction movement amount calculated in this way, the movable flat die 4 can be adjusted to the appropriate top dead center.

[0038] The program for calculating the correction position information of the facing direction position of the fixed flat die 3 calculates the correction position information based on the nominal diameter and pitch information of the product standard information, and data actually measured with the test piece 61. Specifically, using the biting depth T input by the operator, the nominal diameter and pitch of the product standard information, and the information of the facing direction position detected by the facing position detection sensors 33, 33, as described later, the correction position information corresponding to each of the detection positions of the detection sensors 33, 33 is calculated. By operating the position conversion drawing bolt 31 and the position conversion pressing bolt 32 according to the correction position information of each detection position, the fixed flat die 3 can be adjusted to a position where machining can be performed with an appropriate biting depth.

[0039] The touch panel 37, under the display control of the control PC, switches between displaying the correction movement amount of the top dead center of the movable flat die 4 shown in Fig. 7 and the correction position information of the facing direction position of the fixed flat die 3 shown in Fig. 8. Such display switching can be performed by an operator. Note that since conventionally known means can be applied to the processing and operation of this switching, details will be omitted.

[0040] When the correction movement amount of the top dead center of the movable flat die 4 is displayed, as shown in FIG. 7, a standard display section 41 for selectively displaying the screw standard (nominal diameter, pitch, thread direction, etc.), a height display section 74 for displaying information on the height of the movable flat die 4 that has been input, a position deviation amount display section 75 for displaying the input position deviation amount P, and a bar-shaped correction figure section 81 are displayed on the screen of the touch panel 37. This touch panel 37 is the same as that generally used, and can be operated by an operator by touching a predetermined portion. Specifically, by an operator touching and operating the standard display section 41, one of a plurality of pre-set product standard information can be selected and displayed. In the correction figure section 81, a vertical line-shaped target position display section 82 is displayed at the center in the longitudinal direction, and a vertical line-shaped current position display section 83 corresponding to the correction movement amount is displayed. The display position of the current position display section 83 indicates the correction movement amount by the distance separated from the target position display section 82, and approaches the target position display section 82 as the correction movement amount becomes smaller. When the correction movement amount is 0, the current position display section 83 is displayed aligned with the target position display section 82. Also displayed on the touch panel 37 are a rotation direction instruction display section 78 that indicates the rotation direction of the correction bolt 8, and a target value achievement display section 79 that indicates that the current position display section 83 has aligned with the target position display section 82.

[0041] On the other hand, when displaying corrected position information of the opposing direction position of the fixed flat die 3, as shown in Figure 8, the screen of the touch panel 37 displays the above-mentioned standard display section 41, a penetration amount display section 44 displaying the input penetration depth T, first to third current value display sections 43a to 43c displaying the current position information of the fixed flat die 3 detected by the opposing position detection sensors 33, 33 and the rolling position detection sensor 34, and first to third corrected position information display sections 42a to 42c displaying corrected position information of the fixed flat die 3 corresponding to the detected positions of each of these detection sensors 33, 34, respectively.

[0042] Next, a correction method will be described for adjusting the position of the top dead center of the movable flat die 4 and the position of the fixed flat die 3 in the opposing direction in accordance with the product standard (nominal diameter of the screw) before rolling. Here, the correction method is performed using a test piece 61 obtained by rolling a base material 60.

[0043] First, the test piece 61 is created. The test piece 61 is created by instructing the creation of the test piece 61 via the touch panel 37 (not shown). In this embodiment, the drive control device disposed on the base table 2 executes a control operation for creating the test piece in accordance with the operation of the touch panel 37. This drive control device corresponds to the test movement control means according to the present invention.

[0044] More specifically, the product specifications (nominal diameter, pitch, and thread direction) of the screw product to be manufactured are selectively input via the touch panel 37, indicating the start of the process of making the test piece 61.

[0045] As shown in Fig. 4(a), the base material 60 is sandwiched between the fixed side rolling surface forming portion 11 of the fixed flat die 3 and the movable side rolling surface forming portion 21 of the movable flat die 4 at the top dead center, and then the movable flat die 4 is advanced in the forward rolling direction until the base material 60 rotates half a turn, as shown in Fig. 4(b). As a result, a groove-shaped fixed side streak 62 based on the fixed side rolling surface forming portion 11 and a movable side streak 63 based on the movable side rolling surface forming portion 21 are formed in the base material 60 (see Fig. 5).

[0046] With regard to advancing the moving flat die 4 until the base material 60 has made a half rotation, since the nominal diameter, thread pitch, etc. of the screw product to be manufactured are input in advance, the program of the position detection device 35 calculates the amount of movement of the moving flat die 4 based on the outer circumferential length of the machined portion of the test piece 61. Then, the drive control device executes control to automatically move the moving flat die 4 forward from the top dead center by this amount of movement.

[0047] After the base material 60 has made a half rotation, the movable flat die 4 is automatically returned to the top dead center (returning operation). By controlling the automatic reciprocating movement of the movable flat die 4 in this manner by the drive control device, a fixed side score 62 and a moving side score 63 are formed on the base material 60, and a test piece 61 having these scores 62, 63 is obtained.

[0048] As shown in FIG. 5, the test piece 61 has a fixed side streak 62 and a moving side streak 63. Here, one of the grooves formed as the fixed side streak 62 is selected, and a groove center line is determined as a center line formed along the longitudinal direction of the selected groove in a front view of the test piece 61. Then, a positional deviation amount P of the moving side groove center line V determined in the groove formed as the corresponding moving side streak 63 with respect to the imaginary groove center line W that is an extension of the groove center line is measured. The positional deviation amount P is measured as the amount of positional deviation of the moving side groove center line V from the appropriate position in the direction along the axis of the test piece 61, with the case where the moving side groove center line V is located at the imaginary groove center line W being regarded as the appropriate position. For example, the moving side groove center line V is measured to be 0.29 mm lower than the imaginary groove center line W (lower than the head of the test piece 61).

[0049] The positional deviation amount P measured in this manner is input using the touch panel 37. As shown in Fig. 7(A), with a screen for inputting the positional deviation amount P displayed on the touch panel 37, the operator inputs the positional deviation amount (specifically, 0.29 mm) to the positional deviation amount display unit 75 and also inputs the position of the moving flat die 4 (specifically, whether the moving flat die 4 is lower or higher) to the height display unit 74.

[0050] When the positional deviation amount P and the like are input to the touch panel 37, the position detection device 35 automatically calculates the correction movement amount for adjusting the top dead center of the movable flat die 4, as described above, using the nominal diameter, thread pitch, and thread direction of the product standard information, the input information on the height of the movable flat die 4, and the positional deviation amount P. Then, a correction graphic portion 81 displaying the current position display portion 83 at a position indicating this calculated correction movement amount is displayed on the touch panel 37. Furthermore, a rotation direction instruction display portion 78 is also displayed.

[0051] The worker operates the correction bolt 8 while looking at the correction graphic portion 81 and the rotation direction instruction display portion 78, and by making the current position display portion 83 overlap the target position display portion 82, the worker can adjust the top dead center of the movable flat die 4 to an appropriate position where the moving side gutter center line V and the imaginary groove center line W coincide in a straight line. In this way, the worker can operate the correction bolt 8 while more visually recognizing the positional deviation of the movable flat die 4 and its amount.

[0052] When the current position display section 83 and the target position display section 82 overlap, as shown in Fig. 7(B), the target value arrival display section 79 is displayed in place of the rotation direction instruction display section 78, and it is notified that the correction of the position of the movable flat die 4 has been completed. With this configuration, even an unskilled person can easily correct the position of the die of the rolling device 1.

[0053] Meanwhile, either one of the grooves of the fixed side striations 62 and the moving side striations 63 formed on the test piece 61 is selected, and the depth of the groove is measured. Here, the groove depth is measured as the penetration depth T into the outer surface of the test piece 61 before the formation of the fixed side striations 62, etc., as shown in Fig. 5(B). For example, the penetration depth T is measured to be 0.011 mm. Here, by adjusting the bite depth T, the rolling pressure can be adjusted and the pitch can be adjusted. In other words, by adjusting the pitch, a product that matches the pitch of the product standard can be molded. In addition, by adjusting the rolling pressure, slippage during the rolling process can be suppressed. By adjusting the pitch and the rolling pressure in this way, the occurrence of molding defects due to the rolling process can be suppressed.

[0054] The bite depth T measured in this manner is input using the touch panel 37. As shown in Fig. 8, a screen for inputting the bite depth T is displayed on the touch panel 37, and the operator inputs the bite depth T (specifically, 0.011 mm) into the bite amount display unit 44.

[0055] When the biting depth T is input to the touch panel 37, the position detection device 35 automatically calculates, as described above, correction position information corresponding to each detection sensor 33, 33 for adjusting the facing direction position of the fixed flat die 3, using the nominal diameter and pitch of the product standard information, information on the current facing direction position of the fixed flat die 3 detected by the facing position detection sensors 33, 33, and the input biting depth T. Then, the correction position information is displayed on each of the correction position information display sections 42a to 42c of the touch panel 37, and the current position information of the fixed flat die 3 is displayed on each of the current value display sections 43a to 43c.

[0056] The worker loosens the fastening bolts 10, 10 that fix the fixed flat die 3, makes the fixed flat die 3 slidable in the facing direction and the rolling direction, and operates the position conversion drawing bolt 31, the position conversion pressing bolt 32, and the adjustment bolt while comparing the corrected position information display parts 42a to 42c with the current value display parts 43a to 43c. By this operation, the information of the current value display parts 43a to 43c is matched with the corrected position information shown on the corrected position information display parts 42a to 42c, respectively, so that the facing direction position of the fixed flat die 3 can be adjusted to an appropriate position where the desired biting depth (desired rolling pressure and pitch matching the product standard) can be formed during rolling. In this way, the worker can visually recognize the facing direction position of the fixed flat die 3 and the corrected position information and operate the position conversion drawing bolt 31, the position conversion pressing bolt 32, and the adjustment bolt.

[0057] The test piece 61 is rotated half a turn when adjusting the position of the top dead center and the position of the fixed flat die 3 in the opposing direction. First, the fixed side streaks 62 and the moving side streaks 63 are not overlapped. Second, the positional deviation calculated between the imaginary groove center line W, which is an extension of the groove center line of the fixed side streaks 62, and the moving side groove center line V of the moving side streaks 63 is easily measured. Therefore, as long as the positional deviation P between the imaginary groove center line W and the moving side groove center line V can be properly measured, the rotation amount of the base material 60 may be half a turn or less. If the rotation amount of the base material 60 exceeds half a turn, the fixed side streaks 62 and the moving side streaks 63 are formed to overlap, and there is a risk that each center line W, V cannot be correctly recognized. In addition, if the fixed side streaks 62 and the moving side streaks 63 overlap, there is a risk that it becomes difficult to properly measure the bite depth T.

[0058] In this way, the rolling device 1 of this embodiment uses the positional deviation amount P and the bite depth T measured between the fixed side streaks 62 and the moving side streaks 63 formed on the test piece 61 to calculate the correction movement amount for adjusting the position of the top dead center of the moving flat die 4 and the correction position information for adjusting the position of the fixed flat die 3, and displays these on the touch panel 37. The worker can adjust the position of the top dead center of the moving flat die 4 by operating the correction bolt 8 while looking at the touch panel 37, and can adjust the position of the fixed flat die 3 in the facing direction by operating the position conversion drawing bolt 31 and the position conversion pressing bolt 32. Since the position adjustment can be performed while visually recognizing it in this way, the position adjustment can be performed easily and stably. As a result, the worker can accurately and easily adjust the positions of the moving flat die 4 and the fixed flat die 3 to the processing start position suitable for the male thread to be rolled without relying on experience or intuition. In addition, this embodiment has a function to assist the worker in adjusting the positions of the movable flat die 4 and the fixed flat die 3, so that skill training can be conducted through the actual work of adjusting the positions. This makes it possible to efficiently improve the skills of the workers and is also useful for skill transfer.

[0059] In addition, according to the configuration of this embodiment, the quality variation due to the difference in the skill level between workers is suppressed, so the burden of quality control of the screw is reduced and the life of the die is improved. In addition, the time required for advance preparation is shortened, so the burden on the worker is reduced and the operating rate of the rolling device is improved. In addition, there is an advantage that the cost required for the blank until the actual processing can be reduced.

[0060] In the configuration of this embodiment described above, the correction bolt 8 corresponds to the top dead center position adjustment means of the present invention. The control PC 36 and the touch panel 37 correspond to the position deviation amount input means and the bite input means of the present invention, and the touch panel 37 corresponds to the display unit of the present invention. The position detection device 35 corresponds to the correction movement amount calculation control means and the adjustment value output means of the present invention. The position conversion drawing bolt 31 and the position conversion pressing bolt 32 correspond to the opposing position adjustment means of the present invention. The opposing position detection sensors 33, 33 correspond to the opposing position detection means of the present invention, and the first and second current position information correspond to the detected opposing position information of the present invention. The correction graphic portion 81 corresponds to the movement amount corresponding graphic portion of the present invention.

[0061] In the above embodiment, the dimensions and shapes of each part can be freely selected as appropriate. For example, the rotation of the correction bolt may be automatically controlled in response to the correction movement amount. Furthermore, the means for adjusting the position is not limited to the correction bolt, and other configurations such as a turnbuckle may be used. In addition, the amount of positional deviation of the moving side groove center line from the virtual groove center line may be automatically measured from information captured by a camera installed in the rolling device. Similarly, the bite depth of the test piece may be automatically measured from information captured by the camera.

[0062] In the rolling device of the embodiment, the fixed flat die is movable in the facing direction and the facing direction position can be adjusted, but the present invention is not limited to this, and the movable flat die may be movable in the facing direction and the biting depth may be adjusted by adjusting the facing direction position of the movable flat die. Alternatively, both the fixed flat die and the movable flat die may be movable in the facing direction and the facing direction positions of each may be adjusted.

[0063] The rolling device of the embodiment is configured to have a top dead center detection sensor that detects the position of the top dead center of the moving flat die, but is not limited to this, and various means that can measure the position of the moving flat die can be applied. For example, a means for measuring the distance (movement amount) moved by the moving flat die can be provided, and the position of the moving flat die can be obtained based on the movement amount. In this configuration, the moving flat die can be adjusted to the desired top dead center by using the above-mentioned correction movement amount and the movement amount of the moving flat die.

[0064] The rolling device of the embodiment is configured such that the position conversion drawing bolt and the position conversion pressing bolt are provided at the positions near both ends of the fixed flat die, but the present invention is not limited to this, and the positions and the number of the position conversion drawing bolts and the position conversion pressing bolts can be changed as appropriate. For example, one position conversion drawing bolt and one position conversion pressing bolt may be provided at approximately the center of the rolling direction of the fixed flat die, and the opposing positions of the fixed flat die may be adjusted by rotating these bolts. Alternatively, three or four position conversion drawing bolts and three or four position conversion pressing bolts may be provided.

[0065] The rolling device of the embodiment is configured to change the facing direction position of the fixed flat die by rotating the position change drawing bolt and the position change pressing bolt, but it is not limited to this, and it is also possible to change the position of the fixed flat die in the facing direction by one position change bolt. The number and positions of such position change bolts can be determined appropriately.

[0066] The above-mentioned embodiment is an example of a rolling device that rolls male threads, but it can also be applied to devices that roll products other than male threads. For example, it can be applied to a rolling device that performs knurling rolling or form rolling (grooving, etc.), and it can improve work efficiency and stabilize quality in the same way as the above-mentioned embodiment. [Explanation of symbols]

[0067] 1 Rolling equipment 2 Base stand 3 Fixed flat die 4 Moving flat die 8 Correction bolt 11 Fixed side rolled surface part 21 Moving side rolled surface part 31 Position change extraction bolt 32 Position change pressing bolt 33 Opposite position detection sensor 35 Position detection device 36 Control PC 37 Touch Panel 60 Base material 61 Test Piece 62 Fixed side striations 63 Moving side streak V Moving gutter center line W Virtual groove center line P Position deviation amount T Penetration depth

Claims

1. A fixed flat die fixed on a base and having a fixed side rolling surface portion; a movable flat die that is disposed on the base table so as to be freely movable back and forth along the rolling direction and has a movable side rolling surface portion that faces the fixed side rolling surface portion during rolling; In a rolling device comprising: a top dead center position adjusting means for manually adjusting the position of the top dead center of the moving flat die along the rolling direction; a test movement control means having a control content for automatically controlling a forward movement of the moving flat die, which moves the moving flat die a predetermined amount from the position of the top dead center along the rolling direction to rotate the base material halfway, and a return movement of the moving flat die, which returns the moving flat die to the position of the top dead center, thereby obtaining a test piece in which a groove-shaped fixed side streak based on the fixed side rolling surface portion and a groove-shaped moving side streak based on the moving side rolling surface portion are formed on the base material; a positional deviation input means for receiving an input of a positional deviation of the moving-side groove from the appropriate position in a direction along the axis of the test piece, the positional deviation being determined as a state in which the groove center line of the moving-side groove is located on a virtual groove center line formed by extending the groove center line of the fixed-side groove when the test piece is viewed from the front; and a correction movement amount calculation control means having a control content for calculating a distance to a proper top dead center position of the moving flat die as a correction movement amount of the moving flat die based on the input position deviation amount, Furthermore, at least one of the fixed flat die and the movable flat die is arranged so as to be positionally changeable along a facing direction in which the fixed side rolling surface part and the movable side rolling surface part face each other, a position adjusting means for manually adjusting the relative positions of the fixed flat die and the movable flat die in the facing direction; a position detecting means for detecting a relative position between the fixed flat die and the movable flat die in the facing direction; a bite input / output means for receiving an input of a bite depth of the fixed side mark and the moving side mark of the test piece in a radial direction of the test piece obtained by the test movement control means; an adjustment value output means for outputting the correction movement amount calculated by the correction movement amount calculation control means, opposing position information based on the relative position in the opposing direction detected by the opposing position detection means, and the penetration depth input by the penetration depth input means; Equipped A rolling device characterized by:

2. The adjustment value output means A control content for displaying the bite depth input by the bite depth input means on a predetermined display unit; a control content for sequentially displaying the facing position information on the display unit in response to the position adjustment of the relative position in the facing direction by the facing position adjustment means; Equipped with The rolling device according to claim 1 .

3. the adjustment value output means displays a movement amount corresponding graphic portion on a predetermined display portion, The correction movement amount calculation control means The correction movement amount is generated as a movement amount corresponding figure portion according to the movement amount along the direction perpendicular to the rolling direction of the moving flat die and the opposing direction of the fixed side rolling surface portion and the moving side rolling surface portion, and the generated movement amount corresponding figure portion is output to the adjustment value output means. The rolling device according to claim 1 or 2.

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