JP2011088194A - Billet manufacturing method and billet manufacturing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a billet manufacturing method and a billet manufacturing apparatus capable of forming a billet in which the weight after the cutting is in a predetermined range to the predetermined value with excellent accuracy. <P>SOLUTION: The outside diameter dimension of a bar material can be measured continuously along its axial direction by an outside diameter measuring means 5. Based on information (the billet diameter, the target cutting length, the target weight, the billet outside diameter correction control value, the target value or the like) input in advance during the initial setting by a computing means 30, and the outside diameter dimension measured by an outside diameter measuring means 5, and if the outside diameter of the bar material is deviated from the correction control value, the entire length corresponding to the differential diameter of the actually measured value with respect to the target diameter is measured, and the dimension in the axial direction within the predetermined range with respect to the predetermined weight can be calculated. Based on the outside diameter dimension measured by the outside diameter measuring means 5, the cutting position of the bar material 1 of a shearing machine 2 can be corrected so as to obtain the dimension computed by the computing means 30 by a correcting means 31. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a billet production method and billet production apparatus used as a forging material or the like.

  When manufacturing a forged product (for example, a constant velocity universal joint), a long metal bar (bar material) cut into a predetermined size (billet) is used as a material (forged material). In recent years, due to the demand for homogenization and high precision of forged products that are the outer rings of such constant velocity universal joints, high accuracy is required for the weight of billets that are forging materials.

  However, the outer diameter dimension (cross-sectional area) of the bar material used as the base material of the billet varies. For this reason, when the billet is manufactured by cutting the bar material to a predetermined size, the weight of each billet varies. . Therefore, conventionally, there has been proposed a cutting method capable of cutting a billet for forming a power transmission shaft used for a drive shaft, a propeller shaft, etc. with accurate weight accuracy even if the shape of the bar material changes. (Patent Document 1).

  Patent Document 1 describes an apparatus shown in FIG. This apparatus measures the outer diameter of the bar material 104 with an outer diameter measuring device 111 and feeds back the correction to the correction device for correction.

  This apparatus includes cutting blades 101 and 102, a sizing stopper 100, a feed roller 103 that abuts the tip of a bar material 104 against the sizing stopper 100, the outer diameter measuring device 111, and a calculator 112. Prepare. That is, for each bar material 104 to be cut, the cross-sectional area at one point of the tip portion is determined, and the cutting length corresponding to the required billet weight is calculated by the calculator 112 in consideration of the density of the bar material 104 and the like. In this method, after the fixed size stopper 100 is automatically moved and finely adjusted and fixed, the bar material 104 is fed and brought into contact with the fixed size stopper 100 to shear the billet.

  Further, in Patent Document 1, the outer diameter of the steel bar is measured by an outer diameter measuring device before cutting, and the cutting length corresponding to the target weight value of the billet is provisionally determined from the outer diameter of the steel bar. A method for cutting steel bars is described. In this case, the weight of the cut billet is measured with a measuring instrument, and the cutting length of the steel bar is calculated from the weight error amount of the billet measured weight value and the preset target weight value. The length is corrected so as to correspond to the amount.

Japanese Patent No. 2691222

  However, in the case shown in FIG. 6, the outer diameter is measured (indexing of the cross-sectional area) with respect to one point of the tip end portion of one steel bar to be cut. For this reason, when the outer diameter dimension fluctuates along the axial direction of the billet, the weight of the cut billet does not become a predetermined weight.

  In addition, when the cutting length is tentatively determined and the steel bar is cut into the billet, and the weight of the cut billet is measured with a measuring instrument, the billet after cutting is measured with a weight measuring instrument. And manage by weight.

  In this case, if the material once cut and measured for weight is not the prescribed weight, the billet is treated as a defective product and is poured into a defective product pallet. For this reason, it is inferior to productivity.

  Therefore, in view of such circumstances, the present invention intends to provide a billet manufacturing method and a billet manufacturing apparatus capable of accurately forming a billet whose weight after cutting is within a predetermined range with respect to a predetermined weight. .

  The billet manufacturing method of the present invention is a billet manufacturing method for manufacturing a billet of a predetermined weight by cutting a bar material made of a rod-shaped body, and continuously measuring the outer diameter of the bar material along the axial direction. Based on the measured outer diameter, the bar material is cut with an axial dimension that falls within a predetermined range with respect to the predetermined weight. Here, the predetermined weight is a weight necessary for forming a forged product, and the predetermined range is for forming the billet thus manufactured, for example, a forged product such as a constant velocity universal joint. In this case, the range is acceptable as a product. For this reason, there is a case where cutting can be performed with a weight corresponding to a predetermined weight.

  According to the billet manufacturing method of the present invention, the entire length of the cut can be calculated from the predetermined weight based on the outer diameter dimension of the bar material continuously measured along the axial direction, and the bar dimension is within the predetermined weight range. The material can be cut.

  Before cutting the bar material, set the billet diameter, target cutting length, target weight, billet outer diameter correction control value, target value, etc. in advance, and measure the outer diameter of the bar material continuously along the axial direction. When the outer diameter of the bar material deviates from the correction management value, the total length corresponding to the diameter difference of the measured diameter with respect to the target diameter is calculated, and the bar material that falls within the predetermined range weight can be cut after the total length correction. Further, the correction management value and the target value can be arbitrarily changed.

  That is, by measuring the entire bar material, it is possible to correct individual billet lengths with respect to the target weight, and billets corresponding to the target weight can be sequentially cut. However, if the total length is corrected with all billets, the productivity deteriorates. Therefore, by correcting the total length only when the outer diameter correction control value described above is exceeded, both productivity and quality are achieved. Can be obtained.

  The billet production device of the present invention is a billet production device for producing a billet of a predetermined weight by cutting a bar material made of a rod-like body with a shearing cutter, and continuously out of the bar material along the axial direction. An outer diameter measuring means for measuring a diameter dimension, an arithmetic means for calculating an axial dimension that falls within a predetermined range with respect to the predetermined weight based on the outer diameter dimension measured by the outer diameter measuring means, and the calculating means And a correcting means for correcting the cutting position of the bar material of the shearing machine so as to have the dimensions calculated in (1).

  According to the billet manufacturing apparatus of the present invention, the outer diameter of the bar material can be measured continuously along the axial direction by the outer diameter measuring means. Based on the outer diameter dimension measured by the outer diameter measuring means, the calculation means can calculate the total length corresponding to the diameter difference between the measured diameter and the target diameter only when the outer diameter correction management value is exceeded. . The correction means corrects the cutting position of the bar material of the shearing machine so that when the shear outer diameter correction value part reaches the shearing position, the press is temporarily stopped and the dimensions calculated by the calculating means are obtained. Can do. For this reason, in this device, the cutting position of the bar material of the shearing machine is corrected so as to have an axial dimension that falls within a predetermined range with respect to the predetermined weight. I can go.

  As the outer diameter measuring means, an optical sensor including a projector and a light receiver that receives light projected from the projector can be used. In this case, the outer diameter measuring means includes a first optical sensor and a second sensor that is shifted by a predetermined dimension in the axial direction with respect to the first optical sensor, and from the projector of each optical sensor, a belt-like shape. It is preferable that the light is projected, and the projection direction of the belt-like light is shifted by a predetermined angle in the circumferential direction between the first optical sensor and the second optical sensor. Further, the circumferential shift in the light projecting direction of the band-like light between the first optical sensor and the second optical sensor is about 90 °.

  The billet manufacturing method of the present invention can cut a bar material with an axial dimension that falls within a predetermined range with respect to a predetermined weight, and can provide a high-quality billet. For this reason, a forged product (an outer joint member of a constant velocity universal joint) can be formed with high accuracy using this billet.

  If the bar material can be cut with an axial dimension that falls within a predetermined range with respect to the predetermined weight based on the reference value, a billet of high quality can be provided more stably.

  In the billet manufacturing apparatus according to the present invention, the cutting position of the bar material of the shearing machine is corrected so as to have an axial dimension that falls within a predetermined range with respect to the predetermined weight. Can provide high-quality billets.

  An optical sensor including a projector and a light receiver can be used as the outer diameter measuring means, and the outer diameter measuring means can be configured with an existing sensor, so that the cost can be reduced. In addition, when measured with a pair of optical sensors that are irradiated with light that is shifted by 90 ° in the circumferential direction, the accuracy of outer diameter measurement can be improved, and the billet with a weight that conforms to the standard more stably. Can provide.

It is a side view of the billet production device showing the embodiment of the present invention. It is a front view of the outer diameter measuring means of the bullet production apparatus of FIG. It is principle explanatory drawing of the optical sensor which comprises the outer diameter measurement means used for a billet manufacturing apparatus. It is a simplified block diagram of a billet production apparatus. It is a flowchart figure of the billet manufacturing method using a billet manufacturing apparatus. It is a simplified diagram of a conventional billet manufacturing apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  FIG. 1 and FIG. 2 show a billet manufacturing apparatus according to the present invention. This billet manufacturing apparatus shears a long bar material 1 into a predetermined size to manufacture a billet. The bar material supply means 3 for supplying the bar material 1 to the shear cutting machine 2 via the pressure supply means 4 and the pressure supply means 4 and the bar material supply means 3 are interposed. The outer diameter measuring means 5 is provided. In addition, the material of the bar | burr material 1 consists of a various thing for comprising a forging product (For example, the outer joint member of a constant velocity universal joint, etc.).

  Although not shown, the shear cutting machine 2 is a stopper that a cutting blade, a press portion for generating a cutting pressure on the cutting blade, and a tip surface (cut end surface) of the bar material 1 abut upon the shear cutting. Driving means for moving the stopper along the axial direction of the bar member 1. The stopper can be constituted by, for example, an upright piece disposed along a flat vertical direction. The driving means for driving the stopper can be constituted by a reciprocating mechanism such as a cylinder mechanism, a ball / nut mechanism, or a linear guide mechanism. For this reason, in the state which the front end surface (cutting end surface) of the bar material 1 is contact | abutting to the stopper, the cutting pressure is generated on a cutting blade by a press part, and the bar material 1 is cut | disconnected.

  The bar material supply means 3 includes a base 8 and a feed roller mechanism (not shown) disposed on the base 8. The pressurizing and feeding means 4 pressurizes the bar material 1 along the axial direction thereof, and pushes the bar material 1 toward the shearing cutter 2 until the tip end surface of the bar material 1 comes into contact with the stopper. While transporting. Specifically, the pressure feeding means 4 can be constituted by a pinch roller mechanism.

  As shown in FIG. 2, the outer diameter measuring means 5 includes a pair of optical sensors 10 and 11 that are shifted by a predetermined dimension along the axial direction of the bar member 1. Each optical sensor 10, 11 is a laser type outer diameter measuring device. Such a laser type outer diameter measuring device includes a scanning type that scans a laser beam in parallel at a constant speed and measures the dimension of the object to be measured from the time when the shadow is formed, and an object to be measured using an LED. Can be roughly divided into two types, non-scanning type, which measure the dimension of the object to be measured from the change in the amount of light of the shadow.

  That is, such an optical sensor includes a projector 51 that projects laser light or LED light 50 and a light receiver 52 that receives laser light or LED light 50 from the projector 51 as shown in FIG. It is. In the scanning type, the measurement object 53 is positioned in the scanning region of the laser beam 50, and the measurement object 53 is obtained from the length of time for one scanning time of the dark part or the bright part generated by the measurement object 53 reaching the light receiver 52. The outer diameter in the scanning direction is measured. In the non-scanning type, an LED light receiver 52 and an object to be measured 53 are used to read a shadow of the object and measure the dimensions.

  In this embodiment, one optical sensor 10 includes a pair of projectors 12a and 13a and a pair of light receivers 12b and 13b, and receives parallel light 20a21a from the projectors 12a and 13a by the light receivers 12b and 13b. is there. The other optical sensor 11 also includes a pair of light projectors 14a and 15a and a pair of light receivers 14b and 15b, and receives parallel light 20b and 21b from the light projectors 14a and 15a by the light receivers 14b and 15b. . The optical sensors 10 and 11 may be a scanning type as described above or a non-scanning type.

  As shown in FIG. 2, in the optical sensor 10, the projectors 12a and 13a are deviated by 45 ° counterclockwise with respect to the vertical direction. Further, in the optical sensor 11, the projectors 14a and 15a are deviated 45 degrees clockwise with respect to the vertical direction. For this reason, the 1st optical sensor 10 and the 2nd optical sensor 11 have shifted | deviated by 90 degrees along the circumferential direction.

  In this case, the support leg 25 is erected from the installation surface S, the holding plate 26 is erected on the support leg 25, and the optical sensors 10 and 11 are attached to the holding plate 26. The bar material 1 passes through the passage hole 27 at the center of the holding plate 26. Further, the bar material 1 passes between the parallel light 20a and the parallel light 21a of the optical sensor 10 and between the parallel light 20b and the parallel light 21b of the optical sensor 11.

  For this reason, when the bar material 1 passes through the passage hole 27 of the holding plate 26, the outer diameter of the bar material 1 can be continuously measured along the axial direction. The support leg 25 includes a base 25a and a support column 25b standing from the base 25a. In this case, a height adjustment leg 28 is attached to the base 25a.

  By the way, in the billet manufacturing apparatus, in addition to the outer diameter measuring means 5, as shown in FIG. 4, a predetermined predetermined billet to be manufactured is determined based on the outer diameter measured by the outer diameter measuring means 5. The calculation means 30 for calculating the axial dimension that falls within a predetermined range with respect to the weight, and the cutting position of the bar material 1 of the shearing cutter 2 is corrected so that the axial dimension calculated by the calculation means 30 is obtained. And correction means 31. Here, the predetermined weight is a weight necessary for molding a forged product, and the predetermined range is allowed as a product when the billet thus manufactured is molded forged product. It is a range. For this reason, there is a case where cutting can be performed with a weight corresponding to a predetermined weight. Note that the calculation means 30 and the correction means 31 can be configured by, for example, a microcomputer.

  In this case, the billet diameter, target cutting length, target weight, billet outer diameter correction management value, target value, etc. of the bar material 1 are set. And in the calculating means 30, when the outer diameter dimension of the bar material 1 measured by the outer diameter measuring means 5 removes the correction management value, the total length corresponding to the diameter difference of the measured diameter with respect to the target diameter is calculated, The axial dimension is set within a predetermined range with respect to the predetermined weight.

  Next, a billet manufacturing method using this billet manufacturing apparatus will be described based on the flowchart of FIG. At this time, the axial length (predetermined dimension) that is the prescribed weight of the billet to be manufactured at the reference outer diameter is calculated, and the stopper of the shearing machine 2 is cut so that the axial length can be cut. Set the position of. And using the pressure feeding means 3, the bar material 1 is conveyed along the axial direction to the shear cutting machine 2 side, maintaining the predetermined height.

  For this reason, it passes between a pair of optical sensors 10 and 11, and as shown to step S1, an outer diameter dimension will be measured. Then, in step S2, it is determined whether or not the outer diameter dimension thus measured exceeds the outer diameter correction management value. If it is within the correction management value, the process proceeds to step S3, where the bar member 1 is cut by bringing the stopper set as described above into contact with the tip surface of the bar member 1. That is, it cut | disconnects by the said predetermined dimension (predetermined dimension).

  Moreover, when the outer diameter dimension measured in step S2 exceeds the outer diameter correction management value, the process proceeds to step S4, and the bar material 1 is measured based on the outer diameter dimension continuously measured along the axial direction. Calculate the cutting length. Then, the calculation means 30 can calculate the total length corresponding to the diameter difference with respect to the target diameter from the outer diameter dimension of the bar member 1 measured by the outer diameter measuring means 5, and the axial direction dimension that falls within a predetermined range. Will be calculated.

  Then, it transfers to step S5 and cuts with this calculated axial direction dimension. That is, the axial dimension is compared with the target cutting length (predetermined dimension), and if the calculated axial dimension is longer than the target cutting length (predetermined dimension), the stopper is placed on the anti-bar material supply means side. Move to that distance. As a result, the stopper is brought into contact with the front end surface of the bar material 1, and the bar material 1 is cut in this contacted state. For this reason, the cut billet has a weight that falls within a predetermined range with respect to a predetermined weight (a prescribed weight of the billet to be manufactured).

  Further, if the calculated axial direction dimension is shorter than the target cutting length (predetermined dimension), the stopper is moved to the bar material supply means side by the short amount. As a result, the stopper is brought into contact with the front end surface of the bar material 1, and the bar material 1 is cut in this contacted state. For this reason, the cut billet has a weight that falls within a predetermined range with respect to a predetermined weight (a prescribed weight of the billet to be manufactured).

  Thus, when the stopper is moved, the correction value is sent from the correction means 31 to the shearing cutter 2. When the shear outer diameter correction value portion reaches the shear position, the press stops at the top dead center.

After step S3 and step S5, the process proceeds to step S6, and it is determined whether or not to end the cutting work. If finished, the billet production is finished. If not finished, the process returns to step S1 to continue the cutting operation.

  The billet manufacturing method of the present invention is capable of cutting the bar material 1 with an axial dimension that falls within a predetermined range with respect to a predetermined weight, based on the outer diameter dimension of the bar material measured continuously along the axial direction. Can provide high quality billets. For this reason, a forged product can be shape | molded with high precision using this billet.

  Based on the reference value, the bar material 1 can be cut with an axial dimension that falls within a predetermined range with respect to a predetermined weight (a prescribed weight of the billet to be manufactured), and the quality is more stable and high. Can provide billets.

  In the billet manufacturing apparatus of the present invention, the cutting position of the bar material 1 of the shear cutting machine 2 is corrected so as to have an axial dimension that falls within a predetermined range with respect to a predetermined weight. Can be cut and can provide high quality billets.

  As the outer diameter measuring means 5, optical sensors 10 and 11 having projectors 12a, 13a, 14a and 15a and light receivers 12b, 13b, 14b and 15b can be used, and the outer diameter measuring means 5 is used as an existing sensor. The cost can be reduced. Further, in the case of measuring with a pair of optical sensors 10 and 11 that are irradiated with light that is shifted by 90 ° in the circumferential direction, it is possible to improve the accuracy of outer diameter measurement, and to achieve a desired weight more stably. Billet can be provided.

  By the way, the data of the outer diameter measured by the outer diameter measuring means 5 can be stored in a data storage device (which can be configured by a memory unit of the computing means 30) installed in the shearing machine 2 or the like. . As a result, statistical analysis and FB information (feedback information) can be confirmed, and a warning (warning that generates a warning sound or turns on a warning light) can be issued when a quality problem (outside dimension abnormality) occurs. Furthermore, when such an abnormality occurs, information can be transferred to the shearing cutter 2 side, and the driving of the shearing cutter 2 can be stopped.

  As described above, the embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made. Although the sensors 10 and 11 are used, any one of the optical sensors 10 and 11 may be used. Conversely, three or more optical sensors may be used. In addition, each sensor 10 and 11 is provided with a pair of projectors and light receivers, but may be provided with one projector and light receiver. When using a pair of optical sensors 10 and 11, in the said embodiment, although the 1st optical sensor 10 and the 2nd optical sensor 11 shifted | deviated 90 degrees along the circumferential direction, the circumferential direction The shift is not limited to 90 ° in the circumferential direction. The predetermined weight and the predetermined range can be variously changed according to the product to be molded.

DESCRIPTION OF SYMBOLS 1 Bar material 2 Shear cutting machine 5 Outer diameter measuring means 10, 11 Optical sensor 12a, 13a Light projector 12b, 13b Light receiver 14a, 15a Light projector 14b, 15b Light receiver 30 Calculation means 31 Correction means

Claims (6)

A billet production method for producing a billet of a predetermined weight by cutting a bar material made of a rod-shaped body,
The outer diameter of the bar material is continuously measured along the axial direction, and the bar material is cut with an axial dimension that falls within a predetermined range with respect to the predetermined weight based on the measured outer diameter dimension. Billet production method characterized by this.   Before cutting the bar material, set the billet diameter, target cutting length, target weight, billet outer diameter correction control value, target value, etc. in advance, and measure the outer diameter of the bar material continuously along the axial direction. When the outer diameter of the bar material deviates from the correction control value, the total length corresponding to the diameter difference of the measured diameter with respect to the target diameter is calculated, and after the total length correction, the bar material that fits within the predetermined range weight is cut. The billet manufacturing method according to claim 1. A billet production device for producing a billet of a predetermined weight by cutting a bar material made of a rod-like body with a shearing cutting machine,
An outer diameter measuring means for continuously measuring the outer diameter dimension of the bar material along the axial direction;
An arithmetic means for calculating an axial dimension that falls within a predetermined range with respect to the predetermined weight based on the outer diameter dimension measured by the outer diameter measuring means;
A billet manufacturing apparatus comprising correction means for correcting the cutting position of the bar material of the shearing machine so as to have the axial dimension calculated by the calculating means.   The billet manufacturing apparatus according to claim 3, wherein the outer diameter measuring means uses an optical sensor including a light projector and a light receiver that receives light projected from the light projector.   The outer diameter measuring means includes a first optical sensor and a second sensor shifted by a predetermined dimension in the axial direction with respect to the first optical sensor, and the strip light is emitted from the projector of each optical sensor. The billet manufacturing apparatus according to claim 4, wherein the direction in which the band-shaped light is projected is shifted by a predetermined angle in the circumferential direction between the first optical sensor and the second optical sensor.   The billet manufacturing apparatus according to claim 5, wherein a deviation in a circumferential direction in a light projecting direction of the band-like light between the first optical sensor and the second optical sensor is 90 °.

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