Quick-rotating special milling clamp for machining pump shell runway

Abstract

The utility model relates to a clamp, in particular to a milling clamp special for fast rotation and used for machining a pump shell runway. Comprising a base and a rotary indexing table located on the base. The rotary indexing table is rotationally connected with the base, a part positioning hole is formed in the rotary indexing table, and the rotary indexing table is further provided with a fixing assembly and a positioning assembly; the base is provided with at least two rotary positioning holes matched with the positioning assembly, and the circle centers of the rotary positioning holes are located on the same circumference. According to the milling clamp special for machining the pump shell runway in the scheme, common equipment can be used for replacing a machining center, the production efficiency of parts is greatly improved, and the machining cost of the parts is reduced; and the reasonable utilization rate of machining center equipment is increased, and meanwhile the occupancy rate of unnecessary public efficient equipment is reduced.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a fast-rotating special milling clamp used for machining a pump casing raceway. Background Art

[0002] The pump casing is a vital part of the centrifugal pump. At present, the left and right tracks of the pump casing are processed by a machining center: first fix the pump casing on the fixture of the machining center, then correct the center hole of the pump casing, and finally process the left and right tracks through the power head on the machining center. Due to the high machining accuracy of the machining center, the processing time is long, so it is more suitable for single-piece processing or small and medium-sized batches and multi-variety parts with complex shapes, high precision requirements, and dense spatial correlation dimensions. The left and right tracks of the pump casing only have high coaxiality requirements (coaxiality is not greater than 0.03), and other processing technology requirements are not very high. After processing, it is sufficient to ensure connection. Therefore, processing the left and right tracks of the pump casing by the machining center not only takes a long time, resulting in the inability to improve the production efficiency of the pump casing; it also affects the production efficiency of parts with high precision requirements that must be processed by the machining center. At the same time, compared with ordinary milling cutter discs, the purchase price of the power head and the maintenance cost of its tool are higher, resulting in an increase in the processing cost of the pump casing.

[0003] If ordinary equipment is used to process the left and right tracks of the pump casing, it needs to be processed in steps, that is, clamping and positioning to process one track first, and clamping and positioning to process the other track again. Secondary clamping will first affect the progress of processing; and because the coaxiality requirements of the left and right tracks of the pump casing are relatively high, the holes need to be recalibrated during the secondary clamping, resulting in the processing efficiency of ordinary equipment being lower than that of the machining center. Utility Model Content

[0004] The utility model is intended to provide a fast-rotating special milling fixture for machining pump casing runways, which can replace machining centers with ordinary equipment and greatly improve the production efficiency of parts and reduce the cost of parts machining; it also improves the reasonable utilization rate of machining center equipment and reduces the occupancy rate of unnecessary public high-efficiency equipment.

[0005] The accompanying drawings illustrate a fast-rotating special milling fixture for machining a pump casing runway in the present solution, comprising a base and a rotary indexing table located on the base. The rotary indexing table is rotatably connected to the base, and a part positioning hole is opened at the rotation center of the rotary indexing table. The rotary indexing table is provided with a fixing component and a positioning component. Specifically, the bottom of the part to be machined (pump casing) is installed in the part positioning hole so that it is coaxial with the rotary indexing table for preliminary positioning; then the part to be machined is fixed to the rotary indexing table by the fixing component. The rotary indexing table is fixed by the positioning component; after the rotary indexing table rotates to a specified angle, the positioning component can fix the rotary indexing table again. The base is provided with a rotary positioning hole that is compatible with the positioning component, and there are at least two rotary positioning holes and the centers of the rotary positioning holes are all on the same circumference. Preferably, the number and position of the rotary positioning holes can be set according to the angle at which the rotary indexing table needs to rotate.

[0006] The advantages of the utility model are: 1) through the utility model, the left and right runways of the pump casing can be processed on ordinary equipment, the processing time is shortened, and the production efficiency of parts is greatly improved; 2) through the utility model, ordinary disc milling cutters can be used for processing. Since the purchase price and maintenance price of ordinary disc milling cutters are much lower than those of power heads, the production cost of the pump casing is reduced; 3) the reasonable utilization rate of machining center equipment is improved, and at the same time the occupancy rate of unnecessary public high-efficiency equipment is reduced; 4) compared with the hourly cost of processing parts by high-efficiency equipment, the hourly cost of processing parts by ordinary equipment is greatly reduced, thereby reducing the production cost of the pump casing.

[0007] Furthermore, it also includes a main bushing, the base is provided with a limiting hole rotatably connected to the lower end of the main bushing; the upper end of the main bushing is located in the part positioning hole. Preferably, the lower end of the main bushing and the limiting hole on the base are clearance-matched.

[0008] Furthermore, an annular connecting platform is provided on the circumferential side of the main bushing, the annular connecting platform is abutted against the rotary indexing platform, and the main bushing is fixedly connected to the rotary indexing platform via the annular connecting platform.

[0009] Furthermore, the positioning assembly includes a latch and an elastic reset member; the upper end of the latch extends out of the rotary indexing table, and the lower end of the latch passes through the rotary indexing table and can be inserted into the rotary positioning hole. The elastic reset member can insert the lower end of the latch into the rotary positioning hole. The elastic reset member is preferably a reset compression spring or a reset rubber.

[0010] Furthermore, the positioning assembly further comprises a connecting sleeve, and the latch and the elastic reset member are connected to the rotary indexing table via the connecting sleeve. Specifically, the connecting sleeve is fixedly connected to the rotary indexing table, and the elastic reset member is located in the connecting sleeve; the latch passes through the connecting sleeve and extends into the rotary positioning hole under the action of the elastic reset member.

[0011] Furthermore, it also includes a pressure plate fixedly connected to the base, and there are at least two pressure plates distributed in a ring shape around the rotary indexing table; the pressure plate is provided with a step surface, and the step surface is abutted against the end surface of the rotary indexing table to limit the axial position of the rotary indexing table.

[0012] Furthermore, the pressing plate is divided into a pressing part and connecting parts located on both sides of the pressing part; the pressing part is a cantilever structure, and the pressing part is provided with a pressing member. Specifically, the connecting part is fixedly connected to the base, and the pressure of the pressing part on the rotary indexing table is adjusted by the pressing member.

[0013] Furthermore, the fixing assembly includes an axial limiter and a radial limiter; the radial limiter is a stud and a diamond pin, and the axial limiter is a clamping nut; the stud and the diamond pin are symmetrically arranged about the rotation center of the rotary indexing table; the clamping nut is respectively connected to the stud and the diamond pin.

[0014] Further, a secondary bushing is clamped in the limiting hole, and the lower end of the main bushing is rotatably connected to the secondary bushing. In this embodiment, preferably, a clamping platform is provided on the peripheral side of the secondary bushing, and the limiting hole is a stepped hole adapted to the clamping platform.

[0015] Furthermore, it also includes two disc milling cutters, and the distance between the two disc milling cutters is the distance between the left and right runways of the pump housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a top view of a fast-rotating special milling fixture for machining a pump casing raceway according to the utility model;

[0017] Figure 2 for Figure 1 Middle FF section view;

[0018] Figure 3 for Figure 1 AA section view and BB section view;

[0019] Figure 4 This is a structural diagram of a base in a fast-rotating special milling fixture for machining a pump casing runway of the utility model;

[0020] Figure 5 This is a structural diagram of a rotary indexing table in a fast-rotating special milling fixture for machining a pump casing runway of the utility model;

[0021] Figure 6 This is a structural diagram of a main bushing in a fast-rotating special milling fixture for machining a pump casing raceway according to the utility model;

[0022] Figure 7 This is a structural diagram of a pressure plate in a fast rotating special milling fixture for machining a pump housing runway of the utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the pump casing.

[0024] In the figure, 1 is a base, 1-1 is a limiting hole, 1-2 is a rotation positioning hole, 2 is a rotation indexing table, 2-1 is a part positioning hole, 3 is a main bushing, 3-1 is an annular connecting table, 4 is a positioning assembly, 4-1 is a latch, 4-2 is an elastic reset member, 4-3 is a connecting sleeve, 4-4 is a handle, 5 is a pressure plate, 5-1 is a clamping part, 5-2 is a connecting part, 6 is an axial limiting member, 7 is a radial limiting member, 7-1 is a stud, 7-2 is a diamond pin, 8 is a secondary bushing, 9 is a guide sleeve, 10 is a screw, 11 is a cylindrical pin, 12 is a hexagonal bolt, 13 is a pump casing, and 13-1 is a left runway of the pump casing. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0026] according to Figures 1 to 8 As shown, a fast rotating special milling fixture for machining a pump housing raceway comprises a base 1 and a rotary indexing table 2 located on the base 1. Figure 1 , 2 As shown, the rotary indexing table 2 is rotatably connected to the base 1 through the main bushing 3. Specifically, a part positioning hole 2-1 is opened at the rotation center of the rotary indexing table 2, and the base 1 is provided with a limiting hole 1-1 coaxial with the part positioning hole 2-1. The upper end of the main bushing 3 is located in the part positioning hole 2-1, and the lower end of the main bushing 3 is rotatably connected to the limiting hole 1-1. The rotary indexing table 2 is also provided with a fixing component and a positioning component 4. The base 1 is provided with a rotary positioning hole 1-2 adapted to the positioning component 4, and there are at least two rotary positioning holes 1-2 and the centers of the rotary positioning holes 1-2 are on the same circumference. Preferably, the number and position of the rotary positioning holes 1-2 can be set according to the angle at which the rotary indexing table 2 needs to rotate. In this embodiment, the rotary indexing table 2 needs to rotate 180°, that is, there are two rotary positioning holes 1-2 and they are symmetrically arranged.

[0027] As a further improvement of the utility model, according to Figure 6 As shown, an annular connecting platform 3-1 is integrally provided on the circumference of the main bushing 3, the lower end of the part positioning hole 2-1 is a stepped hole, the annular connecting platform 3-1 is located in the stepped hole and abuts against it, and the main bushing 3 is fixedly connected to the rotary indexing table 2 through the annular connecting platform 3-1. Specifically, the rotary indexing table 2 and the main bushing 3 are fixedly connected by three screws 10, and the screws 10 pass through the annular connecting platform 3-1 and the rotary indexing table 2 in sequence and are fixed.

[0028] As a further improvement of the utility model, according to Figure 2As shown, the positioning assembly 4 includes a latch 4-1 and an elastic reset member 4-2. The upper end of the latch 4-1 extends out of the rotary indexing table 2, and the lower end of the latch 4-1 passes through the rotary indexing table 2 and can be inserted into the rotary positioning hole 1-2. Preferably, a handle 4-4 is provided at the upper end of the latch 4-1. The elastic reset member 4-2 can ensure that the lower end of the latch 4-1 is always located in the rotary positioning hole 1-2 when the latch 4-1 is not subjected to axial external force. In this embodiment, the elastic reset member 4-2 is preferably a reset compression spring.

[0029] As a further improvement of the utility model, the positioning assembly 4 also includes a connecting sleeve 4-3. The latch 4-1 and the elastic reset member 4-2 are connected to the rotary indexing table 2 through the connecting sleeve 4-3. Specifically, the connecting sleeve 4-3 is integrally provided with a connecting protrusion on the circumference, and the screw 10 passes through the connecting protrusion to connect with the rotary indexing table 2, and the elastic reset member 4-2 is located in the connecting sleeve 4-3; the latch 4-1 passes through the connecting sleeve 4-3 and extends into the rotary positioning hole 1-2 under the action of the elastic reset member 4-2. A guide sleeve 9 is also provided in the rotary positioning hole 1-2 of the base 1, and the lower end of the latch 4-1 is inserted into the guide sleeve 9 to fix the rotary worktable.

[0030] As a further improvement of the utility model, according to Figure 1 As shown, there are also pressure plates 5 evenly distributed around the rotary indexing table 2, and there are at least two pressure plates 5 connected to the base 1 with screws, preferably two in this embodiment. The pressure plate 5 is provided with a step surface, which abuts against the upper end surface of the rotary indexing table 2 and is used to limit the axial position of the rotary indexing table 2. Preferably, the circumferential side of the rotary indexing table 2 is set to a step structure adapted to the step surface of the pressure plate 5, so that the pressure plate 5 and the upper end surface of the rotary indexing table 2 are in the same plane, and when the pump housing 13 is clamped and fixed, it will not interfere with the pressure plate 5. Preferably, the step surface of the pressure plate 5 is arc-shaped, and its arc radius is the same as the radius of the rotary indexing table 2, so as to increase the contact area between the pressure plate 5 and the rotary indexing table 2.

[0031] As a further improvement of the utility model, according to Figure 7 As shown, the pressing plate 5 is divided into a clamping portion 5-1 and connecting portions 5-2 located on both sides of the clamping portion 5-1; the clamping portion 5-1 is a cantilever structure, and the clamping portion 5-1 is provided with a clamping member. Specifically, the connecting portion 5-2 is fixedly connected to the base 1 by a screw 10 and a cylindrical pin 11. The clamping member is preferably a hexagonal bolt 12, which passes through the clamping portion 5-1 and is threadedly connected to the base 1. By rotating the hexagonal bolt 12, the pressure of the clamping portion 5-1 on the rotary indexing table 2 can be adjusted.

[0032] As a further improvement of the utility model, according to Figure 3As shown, the fixing assembly includes an axial limiter 6 and a radial limiter 7. The radial limiter 7 is a stud 7-1 and a diamond pin 7-2, and the axial limiter 6 is a clamping nut, preferably, the clamping nut is a shoulder nut. The stud 7-1 and the diamond pin 7-2 are symmetrically arranged with respect to the rotation center of the rotary indexing table 2; the clamping nut is threadedly connected to the upper ends of the stud 7-1 and the diamond pin 7-2, respectively.

[0033] As a further improvement of the present invention, a secondary bushing 8 is clamped in the limiting hole 1-1, and the lower end of the main bushing 3 is in clearance fit with the secondary bushing 8. Figure 2 As shown, in this embodiment, preferably, a clamping platform is provided on the circumferential side of the auxiliary bushing 8, and the limiting hole 1-1 is a stepped hole adapted to the clamping platform.

[0034] As a further improvement of the utility model, there are two disc milling cutters, and the distance between the two disc milling cutters is L1+L2. Through one clamping, the left and right tracks of the pump casing can be processed simultaneously, further improving the production efficiency of parts.

[0035] Before use, the bottom of the pump housing 13, the part to be processed, is installed in the main bushing 3 in the part positioning hole 2-1, so that it is coaxial with the rotary indexing table 2; at the same time, the stud and the diamond pin 7-2 are respectively passed through the a and b holes at the bottom of the pump housing 13 for preliminary positioning. Then the pump housing 13 is pressed against the rotary indexing table 2 by the compression nut.

[0036] During processing, according to Figure 8 As shown, calibrate the center of the φD2 hole in the pump housing 13, then fix the utility model on the processing platform of the ordinary machine tool, and calibrate the T surface at the same time. Install the disc milling cutter, first move the disc milling cutter downward by a distance of H1, and at the same time move the disc milling cutter to the right by a distance of L1, and then process the left runway 13-1 of the pump housing according to the parameters such as the rotation speed and feed rate of the disc milling cutter specified in the process.

[0037] After the left runway 13-1 of the pump housing is processed, the disc milling cutter is lifted up by a distance of H1. After the latch 4-1 is lifted and the rotary indexing table 2 is rotated 180°, the latch 4-1 is released, and the latch 4-1 is inserted into another rotary positioning hole 1-2 under the action of the elastic reset member 4-2 to fix the rotary indexing table 2.

[0038] The disc milling cutter moves downward a distance of H1, and at the same time moves rightward a distance of L2, and then processes the right runway of the pump casing according to the disc milling cutter rotation speed, feed rate and other parameters specified in the process.

[0039] Compared with ordinary equipment and machining centers:

[0040] 1) The hourly cost of machining parts is reduced by 2 / 3 compared with ordinary equipment.

[0041] 2) In terms of machining tools, a comprehensive analysis is made based on the purchase price of the power head / the number of parts that can be machined by the power head / the maintenance cost of the tool. The hourly cost of machining parts with the current disc milling cutter is approximately 40% of the previous machining with the power head.

[0042] 3) The machining center is a high-efficiency equipment, and the public utilization rate and equipment utilization rate of high-efficiency equipment are usually required to be relatively high. The utility model can be used to process the left and right tracks of the pump casing on ordinary equipment, thereby improving the reasonable utilization rate of the machining center.

[0043] 4) The preparation time before parts processing is shortened, and the time for processing the left and right runways of the pump casing is reduced by 20%.

[0044] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A fast rotating special milling fixture for machining pump housing raceway, characterized in that: It includes a base and a rotary indexing table located on the base; the rotary indexing table is rotatably connected to the base, the rotary indexing table is provided with a part positioning hole, and the rotary indexing table is also provided with a fixing component and a positioning component; the base is provided with a rotary positioning hole adapted to the positioning component, and there are at least two rotary positioning holes and the centers of the rotary positioning holes are all on the same circumference.

2. A fast rotating special milling fixture for machining a pump housing raceway according to claim 1, characterized in that: It also includes a main bushing, and the base is provided with a limiting hole rotatably connected to the lower end of the main bushing; the upper end of the main bushing is located in the part positioning hole.

3. A fast rotating special milling fixture for machining a pump housing raceway according to claim 2, characterized in that: An annular connecting platform is provided on the circumference of the main bushing, and the annular connecting platform abuts against the rotary indexing platform.

4. A fast rotating special milling fixture for machining a pump housing raceway according to claim 1, characterized in that: The positioning assembly comprises a latch and an elastic reset member; the upper end of the latch protrudes from the rotary indexing table, and the lower end of the latch passes through the rotary indexing table and can be inserted into the rotary positioning hole.

5. A fast rotating special milling fixture for machining a pump housing raceway according to claim 4, characterized in that: The positioning assembly also includes a connecting sleeve, and the latch and the elastic reset member are connected to the rotary indexing table via the connecting sleeve.

6. A fast rotating special milling fixture for machining a pump housing raceway according to claim 1, characterized in that: It also includes a pressure plate fixedly connected to the base, wherein there are at least two pressure plates distributed in a ring shape around the rotary indexing table; the pressure plate is provided with a step surface, which abuts against the end surface of the rotary indexing table and is used to limit the axial position of the rotary indexing table.

7. A fast rotating special milling fixture for machining a pump housing raceway according to claim 6, characterized in that: The pressing plate is divided into a pressing portion and connecting portions located on both sides of the pressing portion; the pressing portion is a cantilever structure, and the pressing portion is provided with a pressing piece.

8. A fast rotating special milling fixture for machining a pump housing raceway according to claim 1, characterized in that: The fixing assembly includes an axial limiter and a radial limiter; the radial limiter is a stud and a diamond pin, and the axial limiter is a clamping nut; the stud and the diamond pin are symmetrically arranged with respect to the rotation center of the rotary indexing table; the clamping nut is respectively connected to the stud and the diamond pin.

9. A fast rotating special milling fixture for machining a pump housing raceway according to claim 2, characterized in that: A secondary bushing is clamped in the limiting hole, and the lower end of the main bushing is rotatably connected to the secondary bushing.

10. A fast rotating special milling fixture for machining a pump housing raceway according to claim 1, characterized in that: It also includes two disc milling cutters, and the distance between the two disc milling cutters is the distance between the left and right runways of the pump housing.

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