A machining method and positioning fixture for a pulper housing

Abstract

The present invention discloses a positioning fixture for a pulping machine shell, comprising a bottom tooling and a side tooling, the bottom tooling being used for positioning the bottom surface of the pulping machine shell, and the side tooling being used for positioning the side surface of the pulping machine shell, the bottom tooling comprising a base and a bottom positioning portion installed on the upper end of the base for positioning the bottom surface of the pulping machine shell; the side tooling comprising a fixed seat, and a movable seat vertically movably matched on the fixed seat, the fixed seat and the movable seat realizing vertical movability through a movable mechanism, a fixed plate being connected to the upper end of the movable seat, and a side positioning portion for clamping the side surface of the pulping machine shell being provided on the fixed plate; the present invention can realize positioning and clamping of the bottom surface and the side surface of the pulping machine shell through this positioning fixture, can realize good positioning of irregular structures, reduce the number of times of installation, disassembly and alignment of workpieces, reduce manual work intensity, improve the use efficiency of machine tools, and reduce processing time.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking equipment, and in particular to a mechanical processing method for a refiner shell and a positioning fixture. Background Art

[0002] The refiner is a continuous pulping machine. Due to its continuous pulping, the pulping quality is uniform and stable, and the efficiency is high. In paper mills, the refiner is not only used as a pulping equipment, but also as a pulping equipment, which makes the refiner widely used in paper mills. Therefore, the refiner has a broad market. Equipment manufacturers invest a lot of manpower, material and financial resources in the production of this type of equipment to improve the manufacturing accuracy of the equipment to meet market demand.

[0003] The traditional machining of the refiner shell is a multi-step process at one station. The shell blank machining quality inspection verifies the blank and accepts it as qualified. Then the relevant personnel arrange the machining personnel to clamp and position the blank. Since the positions to be processed are distributed on multiple surfaces, the blank needs to be turned over, installed, and aligned several times to process multiple surfaces.

[0004] The machining of the refiner shell involves A1 end face machining, A2 end face machining, A3 end face machining, A4 end face machining, and the bottom surface E6 end face and B5 end face machining. After machining, it is necessary to drill and tap A1 hole, drill and tap A2 hole, drill and tap A3 hole, drill and tap A4 hole, and then bore D5 inner hole and D6 inner hole. During the whole process, the workpiece generally needs to be installed and disassembled many times during the machining process. Due to the large size and heavy weight of the workpiece, the lifting, turning and installation all require the assistance of the crane and require 2 people to cooperate in the operation. It is installed on the workbench three times, and the machine tool utilization rate is low. Repeated disassembly, turning, clamping and positioning require high labor intensity and greatly reduce the equipment utilization rate. In addition, unreasonable clamping and positioning methods during the machining process will result in the setting of multiple machining benchmarks, which will cause the machining errors to accumulate and affect the machining accuracy and product quality. Summary of the invention

[0005] In order to solve the problems in the existing production process, the present invention can pre-process the process holes on the side plate and the bottom plate, the bottom of the bottom tooling and the side tooling are connected to the workbench, the top of the bottom tooling and the side tooling are connected to the workpiece, and a side downward clamping processing method is used; the technical solution adopted to achieve the above purpose is:

[0006] A positioning fixture for a pulper housing comprises a bottom fixture and a side fixture, wherein the bottom fixture is used to position the bottom surface of the pulper housing, and the side fixture is used to position the side surface of the pulper housing, the bottom fixture comprises a base and a bottom positioning portion installed on the upper end of the base for positioning the bottom surface of the pulper housing; the side fixture comprises a fixed seat, and a movable seat vertically movably matched on the fixed seat, the fixed seat and the movable seat are vertically movable through a movable mechanism, the upper end of the movable seat is connected to a fixed plate, and the fixed plate is provided with a side positioning portion for clamping the side surface of the pulper housing.

[0007] Furthermore, the base includes a bottom plate and a vertical plate fixedly mounted on the bottom plate, and a connecting plate is fixedly connected to the upper end of the vertical plate.

[0008] Furthermore, the bottom positioning portion includes a bolt, which passes through the connecting plate and is installed in cooperation with the bottom surface of the pulper housing. A gasket is axially installed between the nut of the bolt and the lower end of the connecting plate, and an adjustment screw is radially installed between the bolt and the connecting plate.

[0009] Furthermore, the side positioning portion includes a bolt passing through the upper end of the movable seat, a gasket is axially installed between the nut at the lower end of the bolt and the lower end of the fixed plate, a nut is installed at the upper end of the bolt, an adjustment screw is radially installed between the bolt and the fixed plate, and an upper pressure plate and a lower pressure plate are provided between the adjustment screw and the nut.

[0010] Furthermore, the movable mechanism includes a mounting hole vertically provided on the fixed seat and a matching hole vertically provided on the movable seat, and the mounting hole and the matching hole are fastened by bolts.

[0011] Furthermore, the fixed seat and the movable seat are both designed to be U-shaped, and the movable seat is sleeved inside the fixed seat.

[0012] A method for machining a refiner housing, comprising:

[0013] a. Fix the refiner housing positioning fixture to the workbench, and use the refiner housing positioning fixture to position and clamp the C-end face and F of the refiner housing respectively, so as to realize the downward clamping and positioning of the refiner housing side by the refiner housing positioning fixture;

[0014] b. By adjusting the adjustment screw on the positioning fixture structure of the refiner housing, the C surface of the refiner housing is in a horizontal position, and the C surface of the refiner housing is set as the reference surface for processing by aligning the dial indicator;

[0015] c. Rotate the worktable to process the refiner housing from the refiner housing A to the refiner housing, and process the A1 end face, A2 end face, A3 end face, and A4 end face to complete the processing of the refiner housing A to each end face;

[0016] d. Rotate the worktable 180 degrees, so that the processing tool can process the refiner housing from the refiner housing B to the refiner housing, and process the end face B5;

[0017] e. Rotate the worktable 90 degrees to process the refiner housing from E to the refiner housing, process the end face of E6, and replace the tool for drilling;

[0018] f. Rotate the workbench 90 degrees, so that the processing tool processes the refiner housing from the refiner housing A to the refiner housing, replace the tool according to the different hole diameters, drill and tap the A1 hole, drill and tap the A2 hole, drill and tap the A3 hole, and drill and tap the A4 hole;

[0019] g. Rotate the worktable 90 degrees to allow the machining tool to machine the refiner housing from the D direction of the refiner housing, replace the tool according to the different hole diameters, and bore the inner hole of D5 and the inner hole of D6 respectively;

[0020] h. After processing, the refiner housing is quality inspected by testing tools. If the quality inspection is qualified, the positioning fixture and tool of the refiner housing are disassembled.

[0021] Further, the side downward clamping and positioning in step a includes:

[0022] a1. According to the T-slot pitch on the workbench, a process hole is set on the C-end face of the refiner housing, and the bolts on the bottom tooling are connected to the process holes to complete the positioning of the C-end face of the refiner housing. The bottom tooling is provided with at least 3 and is not located in the same straight line;

[0023] a2. Adjust the side fixture so that the movable seat moves vertically along the fixed seat, and the upper and lower pressure plates are clamped just enough to clamp F.

[0024] The beneficial effects of the present invention are:

[0025] 1. The present invention designs a positioning fixture for the refiner shell, through which the bottom and side surfaces of the refiner shell can be positioned and clamped, and irregular structures can be well positioned, thereby reducing the number of installation, disassembly, and alignment of workpieces, reducing manual labor intensity, improving the use efficiency of machine tools, and reducing processing time.

[0026] 2. The present invention adopts a positioning fixture for the refiner housing for processing. When the worktable rotates, the workpiece only needs to be processed in the A and B directions, which effectively reduces the number of installation and disassembly times, while improving the use efficiency of the equipment and shortening the processing time of the refiner housing. One installation can achieve processing of multiple end faces and multiple features, reducing the work intensity of mechanical processing workers, greatly improving the utilization rate of machine tools and equipment, and greatly shortening the processing time of a single piece, which is suitable for mass production.

[0027] 3. The machining method for the refiner shell used in the present invention uses the C surface of the refiner shell as the reference surface for machining, which can ensure the coaxial accuracy of the machining of each inner hole, the parallel accuracy of the machining of each end surface, the good perpendicularity between each inner hole and each end surface, and the good perpendicularity between each inner hole and the bottom surface, which greatly improves the machining accuracy of the refiner shell, meets the machining requirements, and is more conducive to improving the machining quality of the refiner shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the bottom tooling structure of the present invention;

[0029] Figure 2 It is a top view of the bottom tooling of the present invention;

[0030] Figure 3 It is a schematic diagram of the side tooling structure of the present invention;

[0031] Figure 4 It is a top view of the side tooling of the present invention;

[0032] Figure 5 This is a front view of positioning and clamping the refiner housing according to the present invention;

[0033] Figure 6 This is a left view of the positioning and clamping of the refiner housing according to the present invention;

[0034] Figure 7 This is a top view of positioning and clamping the refiner housing according to the present invention;

[0035] Figure 8 It is a schematic diagram of the three-dimensional structure of the refiner housing of the processed part of the present invention;

[0036] Fig. 9 It is a schematic cross-sectional view of the refiner shell of the processed part of the present invention. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings.

[0038] like Figure 1-7 As shown, in order to achieve positioning and clamping of the refiner housing, multiple end surface structures can be machined in one clamping. The present invention designs a refiner housing positioning fixture, including a bottom tooling 1 and a side tooling 2. The bottom tooling 1 is used to position the bottom surface of the refiner housing, and the side tooling 2 is used to position the side of the refiner housing. The bottom tooling 1 and the side tooling 2 cooperate to complete the positioning and clamping of the refiner housing.

[0039] For the convenience of description, Figure 5-9As shown, the end faces of the workpiece refiner shell to be processed are respectively set to be A1 end face 41, A2 end face 42, A3 end face 43, A4 end face 44 in the A direction; B5 end face 5 in the B direction; E6 end face 6 in the E direction. During the use of the refiner shell, the E6 end face 6 is the bottom surface of the refiner shell; the D direction requires boring of the D5 inner hole 82 and the D6 inner hole 81; in addition, drilling and tapping are required.

[0040] like Figure 1-2 As shown, the bottom tooling 1 includes a base and a bottom positioning portion 14 installed on a fixed plate 24 for positioning the bottom surface of the pulper housing. In this embodiment, the base includes a bottom plate 11 and a vertical plate 12 fixedly installed on the bottom plate 11, and a connecting plate 13 is fixedly connected to the upper end of the vertical plate 12. The bottom plate 11, the vertical plate 12, and the connecting plate 13 are welded, and the bottom positioning portion 14 is installed on the connecting plate 13.

[0041] like Figure 1-2 As shown, in order to achieve clamping and positioning of the bottom surface of the refiner housing, the bottom positioning portion 14 includes a bolt 141, and the bolt 141 passes through the connecting plate 13 and is installed in cooperation with the bottom surface of the refiner housing. A gasket 142 is axially installed between the nut of the bolt 141 and the connecting plate 13, and an adjustment screw 143 is radially installed between the bolt 141 and the connecting plate 13.

[0042] like Figure 3-4 As shown, the side tooling 2 includes a fixed seat 21, and a movable seat 22 which is vertically movable on the fixed seat 21. The fixed seat 21 and the movable seat 22 are vertically movable through a movable mechanism. The upper end of the movable seat 22 is provided with a side positioning portion 25 for clamping the side of the pulper shell. In this embodiment, the fixed seat 21 and the movable seat 22 are both designed to be U-shaped, and the movable seat 22 is installed on the inner side of the fixed seat 21. The lower end of the fixed seat 21 is connected to a mounting plate 23 for connecting to the workbench 3. The upper end of the movable seat 22 is fixedly connected to a fixed plate 24, and the side positioning portion 25 is installed on the fixed plate 24.

[0043] like Figure 3-4 As shown, in order to achieve clamping and positioning of the side of the refiner housing, the side positioning portion 25 includes a bolt 141 passing through the upper end of the movable seat 22. In this embodiment, the bolt 141 is arranged through the fixed plate 24, and a gasket 142 is axially installed between the nut at the lower end of the bolt 141 and the fixed plate 24, a nut 256 is installed at the upper end of the bolt 141, and an adjusting screw 143 is radially installed between the bolt 141 and the fixed plate 24. An upper pressure plate 255 and a lower pressure plate 254 are provided between the adjusting screw 143 and the nut 256. The upper pressure plate 255 and the lower pressure plate 254 are used to press the F plane of the refiner housing to achieve clamping and positioning of the side of the refiner housing.

[0044] like Figure 3-4As shown, in order to realize the vertical movement of the movable seat 22 along the fixed seat 21 and ensure that the upper pressure plate 255 and the lower pressure plate 254 are matched with the clamping and positioning position, the movable mechanism includes a mounting hole vertically provided on the fixed seat 21 and a matching hole vertically provided on the movable seat 22, and the mounting hole and the matching hole are fastened by bolts 141. According to the position of the clamping and positioning position, the movable seat 22 can be slid to move vertically along the fixed seat 21, so that the upper pressure plate 255 and the lower pressure plate 254 are in the same position as the clamping and positioning position, and are fastened by bolts 141 through the matching of the mounting hole and the matching hole.

[0045] like Figure 1-9 As shown, a method for machining a refiner housing comprises:

[0046] a. Fix the refiner housing positioning fixture to the workbench 3, use the refiner housing positioning fixture to position and clamp the C-direction end surface and F of the refiner housing respectively, the bottom fixture 1 positions the C-direction end surface of the refiner housing, and the side fixture 2 positions the side F of the refiner housing, so that the refiner housing positioning fixture can be clamped and positioned downward on the side of the refiner housing with the cooperation of the bottom fixture 1 and the side fixture 2;

[0047] b. By adjusting the adjustment screw 143 on the positioning fixture structure of the refiner housing, the C surface of the refiner housing is in a horizontal position, and it is aligned through a dial indicator. When adjusting, it is necessary to first adjust the adjustment screw 143 on the bottom fixture 1 to make it in a horizontal position, and then fine-tune the side fixture 2, and use the dial indicator to make the entire refiner housing C surface in a horizontal position; set the C surface of the refiner housing as the reference surface for processing, and the following processes all use the C surface as the reference surface for processing, avoiding the accumulation of errors caused by multiple reference surfaces and ensuring the accuracy of processing;

[0048] c. Rotate the worktable 3 to make the machining tool process the refiner shell from the A direction of the refiner shell, and respectively process the A1 end face 41, the A2 end face 42, the A3 end face 43, and the A4 end face 44, and complete the machining of the end faces of the refiner shell A. When machining the A1 end face 41, the A2 end face 42, the A3 end face 43, and the A4 end face 44, it is necessary to firstly flatten the A1 end face 41, the A2 end face 42, the A3 end face 43, and the A4 end face 44 to achieve machining accuracy, and then respectively bore the inner hole on the A1 end face 41, the inner hole on the A2 end face 42, the inner hole on the A3 end face 43, and the inner hole on the A4 end face 44. During the machining process, it is necessary to replace the corresponding tool according to different machining characteristics;

[0049] d. The workbench 3 rotates 180 degrees, so that the machining tool is processed from the refiner housing B to the refiner housing. To process the B5 end face 5, it is necessary to first flatten the B5 end face 5 to achieve the machining accuracy, and then respectively bore the inner holes on the B5 end face 5. During the machining process, the corresponding tool needs to be replaced according to different machining characteristics;

[0050] e. The workbench 3 is rotated 90 degrees, so that the processing tool is processed from the refiner housing E to the refiner housing, and the end face 6 of E6 is processed. It is necessary to flatten the end face first, and then replace the tool for drilling. During the use of the refiner housing, the end face 6 of E6 is the bottom surface of the refiner housing;

[0051] f. The workbench 3 is rotated 90 degrees, so that the processing tool is processed from the refiner housing A to the refiner housing, and the tool is replaced according to the different apertures, and the A1 hole 71 is drilled and tapped, the A2 hole 72 is drilled and tapped, the A3 hole 73 is drilled and tapped, and the A4 hole 75 is drilled and tapped. The A1 hole 71 is located on the end surface of A1, the A2 hole 72 is located on the end surface of A2, the A3 hole 73 is located on the end surface of A3, and the A4 hole 75 is located on the end surface of A4;

[0052] g. The workbench 3 is rotated 90 degrees so that the machining tool is processed from the refiner housing D to the refiner housing, and the tool is replaced according to different apertures, respectively, boring the inner hole 82 of D5 and the inner hole 81 of D6;

[0053] h. After processing, the refiner housing is quality inspected by testing tools. If the quality inspection is qualified, the positioning fixture and tool of the refiner housing are disassembled.

[0054] like Figure 5-7 As shown, in order to better realize the clamping and positioning of the refiner housing and ensure that multiple planes can be processed in one clamping, the side downward clamping and positioning in step a includes:

[0055] a1. According to the T-slot pitch on the workbench 3, a process hole is set on the C-end face of the refiner housing, and the bolt 141 on the bottom tooling 1 is connected to the process hole to complete the positioning of the C-end face of the refiner housing. The bottom tooling 1 is provided with at least 3 and is not located on the same straight line;

[0056] a2. Adjust the side tooling 2 so that the movable seat 22 moves vertically along the fixed seat 21, and the upper and lower pressure plates 255 and 254 are completed to clamp F just;

[0057] a3. The bottom fixture 1 and the side fixture 2 cooperate to complete the downward clamping and positioning of the refiner housing.

[0058] The present invention adopts a positioning fixture for the pulping machine housing for processing. When the worktable 3 rotates, the workpiece only needs to be processed in the A direction and the B direction, which effectively reduces the number of installation and disassembly times, while improving the use efficiency of the equipment and shortening the processing time of the pulping machine housing; one installation can realize the processing of multiple end faces and multiple features, reducing the work intensity of mechanical processing workers, greatly improving the utilization rate of machine tools and equipment, and greatly shortening the processing time of a single piece, which is suitable for mass production.

[0059] This embodiment does not impose any formal limitation on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0060] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0061] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0062] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0063] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A refiner housing positioning fixture, characterized in that: It includes a bottom fixture and a side fixture, wherein the bottom fixture is used to position the bottom surface of the refiner housing, and the side fixture is used to position the side surface of the refiner housing; The bottom tooling comprises a base and a bottom positioning portion installed on the upper end of the base for positioning the bottom surface of the refiner housing; The side tooling includes a fixed seat and a movable seat vertically movably matched on the fixed seat, the fixed seat and the movable seat realize vertical movably matching through a movable mechanism, the upper end of the movable seat is connected to a fixed plate, and the fixed plate is provided with a side positioning part for clamping the side of the refiner housing; The base comprises a bottom plate and a vertical plate fixedly mounted on the bottom plate, and a connecting plate is fixedly connected to the upper end of the vertical plate; The bottom positioning part comprises a bolt, which passes through the connecting plate and is installed in cooperation with the bottom surface of the refiner housing, a gasket is installed axially between the nut of the bolt and the lower end of the connecting plate, and an adjusting screw is installed radially between the bolt and the connecting plate; The side positioning part includes a bolt passing through the upper end of the movable seat, a gasket is axially installed between the nut at the lower end of the bolt and the lower end of the fixed plate, a nut is installed at the upper end of the bolt, an adjustment screw is radially installed between the bolt and the fixed plate, and an upper pressure plate and a lower pressure plate are arranged between the adjustment screw and the nut; The lower end of the fixing seat is connected with a mounting plate for connecting to a workbench.

2. A refiner housing positioning fixture according to claim 1, characterized in that: The movable mechanism comprises a mounting hole vertically arranged on the fixed seat and a matching hole vertically arranged on the movable seat, and the mounting hole and the matching hole are fastened by bolts.

3. A refiner housing positioning fixture according to claim 2, characterized in that: The fixed seat and the movable seat are both designed to be U-shaped, and the movable seat is sleeved inside the fixed seat.

4. A method for machining a refiner housing based on the refiner housing positioning fixture according to any one of claims 1 to 3, characterized in that: include: a. Fix the refiner housing positioning fixture to the workbench, and use the refiner housing positioning fixture to position and clamp the C-end face and F of the refiner housing respectively, so as to realize the downward clamping and positioning of the refiner housing side by the refiner housing positioning fixture; b. By adjusting the adjustment screw on the positioning fixture structure of the refiner housing, the C surface of the refiner housing is in a horizontal position, and the C surface of the refiner housing is set as the reference surface for processing by aligning the dial indicator; c. Rotate the worktable to process the refiner housing from the refiner housing A to the refiner housing, and process the A1 end face, A2 end face, A3 end face, and A4 end face to complete the processing of the refiner housing A to each end face; d. Rotate the worktable 180 degrees, so that the processing tool can process the refiner housing from the refiner housing B to the refiner housing, and process the end face B5; e. Rotate the worktable 90 degrees to process the refiner housing from E to the refiner housing, process the end face of E6, and replace the tool for drilling; f. Rotate the workbench 90 degrees, so that the processing tool processes the refiner housing from the refiner housing A to the refiner housing, replace the tool according to the different hole diameters, drill and tap the A1 hole, drill and tap the A2 hole, drill and tap the A3 hole, and drill and tap the A4 hole; g. Rotate the worktable 90 degrees to allow the machining tool to machine the refiner housing from the D direction of the refiner housing, replace the tool according to the different hole diameters, and bore the inner hole of D5 and the inner hole of D6 respectively; h. After processing, the refiner housing is quality inspected by testing tools. If the quality inspection is qualified, the positioning fixture and tool of the refiner housing are disassembled.

5. A refiner housing machining method according to claim 4, characterized in that: The side downward clamping and positioning in step a includes: a1. According to the T-slot pitch on the workbench, a process hole is set on the C-end face of the refiner housing, and the bolts on the bottom tooling are connected to the process holes to complete the positioning of the C-end face of the refiner housing. The bottom tooling is provided with at least 3 and is not located in the same straight line; a2. Adjust the side fixture so that the movable seat moves vertically along the fixed seat, and the upper and lower pressure plates are clamped just enough to clamp F.

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