An integrated processing tooling and processing method for the circumferential wear-resistant block positioning groove of an extrusion roll

Abstract

The present invention introduces a tooling and a method for processing the circumferential wear-resistant block positioning grooves of an integrated extrusion roller. The indexing plate sets the indexing holes to one or two circles according to the diameter of the extrusion roller shaft end and the number of the wear-resistant block positioning grooves, and reduces the size of the indexing plate body as much as possible, which not only saves tooling materials but also ensures the accuracy of the indexing; the positioning accuracy is ensured by cooperating between the convex stop of the indexing plate and the concave stop of the extrusion roller; the processing tooling is used to align the precise position of the wear-resistant block positioning groove, simplify the processing method, ensure the processing accuracy, solve the processing problem of low circumferential position accuracy of the wear-resistant block positioning groove of the integrated extrusion roller of the roller press, and provide an effective theoretical and practical basis for ensuring the circumferential position accuracy of the wear-resistant block positioning groove of the integrated extrusion roller of the roller press.

Description

Technical Field

[0001] The present invention relates to the technical field of processing an integrated extrusion roller of a roller press, and in particular to a tool and method for processing a circumferential wear-resistant block positioning groove of an integrated extrusion roller. Background Art

[0002] In the metal mining industry, roller press has the advantages of low power consumption and high output compared with ball mill and semi-autogenous mill; the core component of roller press is the extrusion roller. In order to resist wear and increase the life of roller surface, in addition to carbide studs installed on the extrusion roller surface, wear-resistant blocks are also installed along the circumference of the roller width at both ends. The wear-resistant blocks are fixed by a circle of multi-arc shaped positioning grooves; there are two main structural forms of extrusion rollers: one is a split structure, in which the roller shaft and roller sleeve are assembled by interference fit. For the split structure extrusion roller, the roller sleeve is placed on a CNC floor boring and milling machine with a rotary table before assembly. The circumferential distribution accuracy of the wear-resistant block positioning grooves on the roller sleeve is guaranteed by the rotation accuracy of the rotary table of the machine tool; the other is an integrated structure, in which the blank adopts a The extrusion roller of the one-piece forging and one-piece structure is a long axis part with a length of 4m-5m. Since the parts are thin at both ends and thick in the middle, vertical processing requires placing a square box on the rotary worktable of the boring machine to support the end face of the middle roller sleeve. This mounting method has certain safety risks; horizontal processing is used on the CNC gantry boring and milling machine, and there are multiple rotations of the parts, and the circumferential positioning error is large, which cannot meet the requirements of the drawings; using the five-axis linkage processing of the CNC gantry boring and milling machine, there is a problem of adjusting the parts at one time, and the reset accuracy cannot be guaranteed; the above-mentioned method of processing the wear-resistant block positioning groove cannot guarantee the circumferential position, which is directly reflected in the assembly stage. After the wear-resistant blocks are installed, the gaps between the wear-resistant blocks are of different sizes, affecting the appearance and service life. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an integrated extrusion roller circumferential wear-resistant block positioning groove processing tool and processing method to ensure processing accuracy.

[0004] The technical solution adopted in the present invention is:

[0005] An integrated extrusion roller circumferential wear-resistant block positioning groove processing tool, comprising a dividing plate, a positioning pin and a positioning block;

[0006] The circumference of the indexing plate is evenly provided with indexing holes with the same number as the positioning grooves of the wear-resistant block at the end of the extrusion roller shaft. The circumferential diameter of the indexing holes is larger than the circumferential diameter of the end face of the extrusion roller. A convex stop that matches the concave stop on the end face of the extrusion roller is provided in the middle of the back side of the indexing plate. A circle of bolt holes corresponding to the holes on the end face of the extrusion roller is provided around the convex stop on the surface of the indexing plate. Two drill sleeves for positioning are also provided on the surface of the indexing plate; two locating pins are respectively provided in two indexing holes whose center line passes through the center of the indexing plate; the positioning block is an inverted T-shaped block structure, which is provided on the front side of the indexing plate and cooperates with the positioning pin on the lower side when the center line of the two locating pins is in a vertical position.

[0007] Specifically, the circumferential indexing holes of the indexing plate are arranged in one circle or two circles according to the diameter of the extrusion roller shaft end and the number of the positioning grooves of the wear-resistant blocks.

[0008] A method for machining a positioning groove of a circumferential wear-resistant block of an integrated extrusion roller, comprising the following steps:

[0009] Step 1: Select the indexing plate with the smallest outer diameter according to the diameter of the extrusion roller shaft end and the number of wear-resistant block positioning grooves; when the number of wear-resistant block positioning grooves is small, set one circle of indexing holes on the indexing plate; when the number of wear-resistant block positioning grooves is large, it cannot meet the drilling requirements and one circle cannot be arranged. Set two circles of indexing holes on the indexing plate, and the sum of the number of indexing holes in the two circles is equal to the number of wear-resistant block positioning grooves;

[0010] Step 2: Align the convex stop on the back of the indexing plate with the concave stop on the end face of the extrusion roller, install the indexing plate on the end face of the extrusion roller, and use a feeler gauge to check that the gap between the stoppers is uniform along the cross direction. Then, tighten it with bolts through the bolt holes on the indexing plate. Use a universal drill to machine the pin holes from the drill sleeve of the indexing plate to the extrusion roller. Then, use an internally threaded cylindrical pin to drive the pin holes on the indexing plate and the extrusion roller to further position the indexing plate and the extrusion roller to prevent the indexing plate from moving due to the assembly gap between the bolt holes and the bolts during subsequent processing vibrations.

[0011] Step 3: Insert the two locating pins into the indexing holes of the indexing disk. If the indexing holes are set to two circles, insert them into the outer circle indexing holes first. The center line of the two indexing holes where the two locating pins are inserted passes through the center of the indexing disk, and mark the positions of the two indexing holes with a marker. Use the rollers set at the shaft necks at both ends of the extrusion roller to adjust the position of the extrusion roller workpiece so that the center line of the two locating pins is in a horizontal position, which is convenient for the marking personnel to use the marking disk to control the height. Use the marking disk to push this center line flatly to the roller surface of the extrusion roller, and draw the first longitudinal bisector line as the marking reference line. Based on this, draw each longitudinal bisector line along the circumferential direction according to the wear-resistant block positioning groove indexing; then use the end face of the roller sleeve as the reference, and according to the distance between the arc center of the wear-resistant block positioning groove and the end face of the roller sleeve, draw the circumferential center line of the wear-resistant block positioning groove, one circle at each end of the roller sleeve, for a total of two circles; use the intersection of the two circumferential center lines and the two ends of each longitudinal bisector line as the center of the circle to draw the hole line of the arc of each wear-resistant block positioning groove;

[0012] Step 4: Recheck that the two locating pins in the outer ring of the indexing plate are in the indexing hole positions marked with a marker. The machine tool pulls the table to check verticality according to the inserted upper and lower locating pins with an allowable error of 0.02mm. Make sure the center line of the two locating pins is in a vertical position and fix the extrusion roller.

[0013] Step 5: Fix the locating block on the horizontal surface outside the indexing plate, with the vertical locating surface of the locating block close to the locating pin at the bottom of the indexing plate. Use a meter to check the verticality of the locating surface of the locating block and the horizontal surface. The tolerance should be within 0.03mm. Use a feeler gauge to check the gap between the locating pin and the locating block. It should not be within 0.03mm.

[0014] Step 6: Use the bevel iron to wedge the journals at both ends of the extrusion roller. After rechecking that the CNC program is consistent with the roller surface markings, mill the first wear-resistant block locating groove on the roller surface. After the wear-resistant block locating grooves corresponding to both ends of the roller sleeve are completed, pull out the locating pin and insert it into the next hole position of the indexing plate. Loosen the bevel iron, rotate the extrusion roller workpiece until the locating pin is close to the locating block, use the bevel iron to wedge the journals at both ends, mill the next wear-resistant block locating groove, and repeat this until the locating pin is inserted through all indexing holes to complete the processing of all wear-resistant block locating grooves.

[0015] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0016] The indexing plate of the present invention sets the indexing holes to one circle or two circles according to the diameter of the extrusion roller shaft end and the number of the wear-resistant block positioning grooves, thereby reducing the size of the indexing plate body as much as possible, saving tooling materials and ensuring the accuracy of indexing; the positioning accuracy is ensured by cooperating between the convex stop of the indexing plate and the concave stop of the extrusion roller; the processing tool is used to align the precise position of the wear-resistant block positioning groove, simplifying the processing method and ensuring the processing accuracy, solving the processing problem of low circumferential position accuracy of the wear-resistant block positioning groove of the integrated extrusion roller of the roller press, and providing an effective theoretical and practical basis for ensuring the circumferential position accuracy of the wear-resistant block positioning groove of the integrated extrusion roller of the roller press. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of the processing tooling of the present invention being installed on the squeezing roller.

[0018] Figure 2 1 is a schematic diagram of a processing tool of the present invention.

[0019] Figure 3 yes Figure 2 Schematic diagram in the other direction.

[0020] Figure 4 It is a schematic diagram of a line drawing of a part of the roller surface of the squeezing roller of the present invention.

[0021] In the figure: 1- indexing plate, 2- positioning pin, 3- positioning block, 4- convex stop, 5- extrusion roller, 6- wear block positioning groove, 7- drill sleeve, 8- longitudinal bisector reference line, 9- circumferential center line. DETAILED DESCRIPTION

[0022] The present invention will be further explained below with reference to the accompanying drawings and embodiments, which should not be used to limit the scope of protection of the present invention. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0023] Taking GM200-180 roller press as an example, there is a circle of grooves for installing wear-resistant blocks at both ends of the roller sleeve. There are 128 grooves distributed in the circumferential direction, and the groove position accuracy is 0.2mm. Figure 1-4 An integrated extrusion roller circumferential wear-resistant block positioning groove processing tool and processing method, the specific steps are:

[0024] Step 1: According to the diameter of the shaft end of the extrusion roller 5 and the number of the wear-resistant block positioning grooves 6, select the dividing plate 1 that meets the requirements of the indexing hole drilling and has the smallest outer diameter; 2 circles × 64 / circle = 128 refined indexing holes are evenly arranged on the circumference of the dividing plate 1, and the position of the indexing holes is controlled at 0.05mm. The circumferential diameter of the indexing holes is larger than the circumferential diameter of the end face of the extrusion roller 5. A circle of convex stops 4 that match the concave stops on the end face of the extrusion roller 5 is provided in the middle of the back of the dividing plate 1. A circle of bolt holes corresponding to the holes on the end face of the extrusion roller 5 are provided around the convex stops 4 on the surface of the dividing plate 1. Two drill sleeves 7 for positioning are also provided on the surface of the dividing plate 1; two locating pins 2 are respectively arranged in the two indexing holes whose center line passes through the center of the dividing plate 1; the positioning block 3 is an inverted T-shaped block structure, and the positioning block 3 is arranged on the front side of the dividing plate 1.

[0025] Step 2: Align the convex stop 4 on the back of the indexing plate 1 with the concave stop on the end face of the extrusion roller 5, install the indexing plate 1 on the end face of the extrusion roller 5, and use a feeler gauge to check that the gap between the matching stops is uniform along the cross direction and the tolerance gap is within 0.05mm. Tighten it with bolts passing through the bolt holes on the indexing plate 1; use a universal drilling machine and a drill sleeve 7 as a guide to process the pin holes at the drill sleeve 7 of the indexing plate 1 to the extrusion roller 5, and then use an internal threaded cylindrical pin to drive the pin holes on the indexing plate 1 and the extrusion roller 5 to further position the indexing plate 1 and the extrusion roller 5 to prevent the indexing plate 1 from moving due to the assembly gap between the bolt hole and the bolt during subsequent processing vibration.

[0026] Step 3: Insert the two locating pins 2 into the indexing holes of the outer ring of the indexing plate 1. The center line of the two indexing holes where the two locating pins 2 are inserted passes through the center of the indexing plate 1, and mark the positions of the two indexing holes with a marker. Use the rollers set at the two ends of the shaft neck of the extrusion roller 5 to adjust the position of the extrusion roller 5 workpiece so that the center line of the two locating pins 2 is in a horizontal position, which is convenient for the marking personnel to use the marking disk to control the height. Use the marking disk to push this center line horizontally to the roller surface of the extrusion roller 5 and mark the first A longitudinal bisector is used as a reference line, and the longitudinal bisector reference line 8 is used as a reference to divide the longitudinal bisectors along the circumferential direction according to the wear-resistant block positioning groove 6; then the end face of the roller sleeve is used as a reference, and according to the distance between the center of the arc of the wear-resistant block positioning groove 6 and the end face of the roller sleeve, the circumferential center line 9 of the wear-resistant block positioning groove 6 is drawn, one circle at each end of the roller sleeve, for a total of two circles; with the intersection of the two circumferential center lines 9 and the two ends of each longitudinal bisector as the center of the circle, the hole line of the arc of each wear-resistant block positioning groove 6 is drawn.

[0027] Step 4: Recheck that the two locating pins 2 in the outer ring of the indexing plate 1 are in the indexing hole positions marked with a marker. Use the CNC gantry boring and milling machine to check verticality according to the inserted upper and lower locating pins 2 with a pull table. The tolerance is 0.02mm, so that the center line of the two locating pins 2 is in a vertical position, and fix the extrusion roller 5.

[0028] Step 5: Mill the plane on the outside of the indexing plate 1 that contacts the bottom surface of the tooling positioning block 3 until it is flat, with a finish of Ra6.3. Place the vertical positioning surface of the positioning block 3 close to the positioning pin 2 at the bottom of the indexing plate 1, fix the positioning block 3 on the horizontal plane, and use a meter to check the verticality of the positioning surface of the positioning block 3 and the horizontal plane. The allowable error is within 0.03mm; use a feeler gauge to check the gap between the positioning pin 2 and the positioning block 3. It should not exceed 0.03mm.

[0029] Step six: Use the bevel iron to wedge the journals at both ends of the extrusion roller 5. After rechecking that the CNC program is consistent with the roller surface markings, mill the first wear-resistant block positioning groove 6 on the roller surface. After the wear-resistant block positioning grooves 6 corresponding to both ends of the roller sleeve are completed, pull out the locating pin 2, insert it into the next hole position of the indexing plate 1, loosen the bevel iron, rotate the extrusion roller 5 workpiece until the locating pin 2 is close to the locating block 3, use the bevel iron to wedge the journals at both ends, mill the next wear-resistant block positioning groove 6, and repeat this until the locating pin 2 is inserted through all the indexing holes and the processing of all the wear-resistant block positioning grooves 6 is completed.

[0030] The parts not described in detail in this invention are prior art.

[0031] The embodiments selected herein for the purpose of disclosing the invention are presently considered suitable, but it should be understood that the invention is intended to include all variations and modifications of the embodiments that fall within the scope of the concept and invention.

Claims

1. A method for machining positioning grooves of circumferential wear-resistant blocks of an integrated extrusion roller, characterized in that: The processing tooling used in the processing method includes a dividing plate, a positioning pin and a positioning block; The indexing plate is evenly provided with indexing holes on the circumference thereof, the number of which is the same as the locating grooves of the wear-resistant block at the end of the extrusion roller shaft; the circumferential diameter of the indexing holes is larger than the circumferential diameter of the end face of the extrusion roller; a circle of convex stops matching the concave stops on the end face of the extrusion roller is provided in the middle of the back face of the indexing plate; a circle of bolt holes corresponding to the holes on the end face of the extrusion roller are provided around the convex stops on the surface of the indexing plate; the surface of the indexing plate is also provided with two drill sleeves for positioning; two locating pins are respectively provided in two indexing holes whose center line passes through the center of the indexing plate; the positioning block is an inverted T-shaped block structure, the positioning block is provided on the front side of the indexing plate, and matches with the positioning pin on the lower side when the center line connecting the two locating pins is in a vertical position; The specific steps of the processing method are: Step 1: Select the indexing plate with the smallest outer diameter according to the diameter of the extrusion roller shaft end and the number of wear-resistant block positioning grooves; when the number of wear-resistant blocks is small, set one circle of indexing holes on the indexing plate; when the number of wear-resistant blocks is large, one circle cannot be arranged, set two circles of indexing holes on the indexing plate, and the sum of the number of indexing holes in the two circles is equal to the number of wear-resistant block positioning grooves; Step 2: Align the convex stop on the back of the indexing plate with the concave stop on the end face of the extrusion roller, install the indexing plate on the end face of the extrusion roller, and use a feeler gauge to check that the gap between the stoppers is uniform along the cross direction. Then, tighten it with bolts through the bolt holes on the indexing plate. Use a universal drill to machine the pin holes from the drill sleeve of the indexing plate to the extrusion roller. Then, use an internally threaded cylindrical pin to drive the pin holes on the indexing plate and the extrusion roller to further position the indexing plate and the extrusion roller to prevent the indexing plate from moving due to the assembly gap between the bolt holes and the bolts during subsequent processing vibrations. Step 3: Insert the two locating pins into the indexing holes of the indexing disk. If the indexing holes are set to two circles, insert them into the outer circle indexing holes first. The center line of the two indexing holes where the two locating pins are inserted passes through the center of the indexing disk, and mark the positions of the two indexing holes with a marker. Use the rollers set at the shaft necks at both ends of the extrusion roller to adjust the position of the extrusion roller workpiece so that the center line of the two locating pins is in a horizontal position, which is convenient for the marking personnel to use the marking disk to control the height. Use the marking disk to push this center line flatly to the roller surface of the extrusion roller, and draw the first longitudinal bisector line as the marking reference line. Based on this, draw each longitudinal bisector line along the circumferential direction according to the wear-resistant block positioning groove indexing; then use the end face of the roller sleeve as the reference, and according to the distance between the arc center of the wear-resistant block positioning groove and the end face of the roller sleeve, draw the circumferential center line of the wear-resistant block positioning groove, one circle at each end of the roller sleeve, for a total of two circles; use the intersection of the two circumferential center lines and the two ends of each longitudinal bisector line as the center of the circle to draw the hole line of the arc of each wear-resistant block positioning groove; Step 4: Recheck that the two locating pins in the outer ring of the indexing plate are in the indexing hole positions marked with a marker. The machine tool pulls the table to check verticality according to the inserted upper and lower locating pins with an allowable error of 0.02mm. Make sure the center line of the two locating pins is in a vertical position and fix the extrusion roller. Step 5: Fix the locating block on the horizontal surface outside the indexing plate, with the vertical locating surface of the locating block close to the locating pin at the bottom of the indexing plate. Use a meter to check the verticality of the locating surface of the locating block and the horizontal surface. The tolerance should be within 0.03mm. Use a feeler gauge to check the gap between the locating pin and the locating block. The gap value should be less than 0.03mm. Step 6: Use the bevel iron to wedge the journals at both ends of the extrusion roller. After rechecking that the CNC program is consistent with the roller surface markings, mill the first wear-resistant block locating groove on the roller surface. After the wear-resistant block locating grooves corresponding to both ends of the roller sleeve are completed, pull out the locating pin and insert it into the next hole position of the indexing plate. Loosen the bevel iron, rotate the extrusion roller workpiece until the locating pin is close to the locating block, use the bevel iron to wedge the journals at both ends, mill the next wear-resistant block locating groove, and repeat this until the locating pin is inserted through all indexing holes to complete the processing of all wear-resistant block locating grooves.

2. The method for machining the positioning groove of the circumferential wear-resistant block of the integrated extrusion roller according to claim 1, characterized in that: The circumferential indexing holes of the indexing plate are arranged in one circle or two circles according to the diameter of the extrusion roller shaft end and the number of the positioning grooves of the wear-resistant block.

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