A multi-way valve body machining center fixture

Abstract

The present invention discloses a multi-way valve body machining center fixture, comprising a base plate, with upper and lower sets of fixtures provided on the front side of the base plate. The fixture comprises a support seat, a pressing seat, and an adjustable support pin. The support seat is provided at the bottom of the fixture, with an open groove provided in the middle of the support seat penetrating the upper and lower sides. The support seat is provided with two hook-shaped support pins that cooperate with the oil trough holes of the workpiece for clamping. The pressing seat is provided with two pieces, symmetrically arranged in upper and lower directions, wherein the pressing seat provided at the lower end is clamped in the open groove. The adjustable support pins are provided with three pieces. The present invention positions the hook-shaped support pins with the oil trough holes of the workpiece, and the upper and lower pressing seats are relatively clamped, so that a blank can be directly loaded. The left, front, and right sides of the workpiece and multiple valve holes on the three sides can be machined in one clamping operation. The process integration is high, and errors caused by multiple clamping operations can be effectively avoided, ensuring the consistency of subsequent key honing operations. In addition, the fixture can clamp two workpieces for processing at one time, greatly improving processing efficiency and quality.

Description

Technical Field

[0001] The invention relates to the technical field of multi-way valve body processing, in particular to a multi-way valve body processing center fixture. Background Art

[0002] In the field of multi-way valve manufacturing, the valve body is a key component, and the machining accuracy of the valve hole directly affects the assembly accuracy of the multi-way valve. Due to the complex structure of the valve body, there are many processing steps and the machining center requires frequent tool changes.

[0003] Traditionally, multi-way valve bodies are manufactured using a conventional milling machine, first machining six surfaces of the valve body. Three of these surfaces are then used to locate and machine the valve holes. Due to the complex structure of the valve body, existing machining methods require multiple clampings and frequent tool changes. The valve body's positioning datum is also constantly shifting, creating errors with each clamping. This cumulative error is significant, and the axial dimension of the valve hole is significantly affected by the blank's shape. This results in large axial dimensional deviations, low valve hole accuracy, and a low pass rate. Furthermore, the labor intensity is high, and machining efficiency is low. Summary of the Invention

[0004] In order to solve the problem that the above-mentioned existing multi-way valve body processing technology requires multiple clamping and frequent tool changes, resulting in large cumulative errors, large axial dimension deviation of the valve body, and low valve hole accuracy, the present invention provides a multi-way valve body processing center clamp, which adopts hook-shaped support pins and the oil groove hole and upper side of the workpiece for positioning, and the upper and lower clamping seats are relatively clamped, so the blank can be directly loaded and clamped in one time. The left, front and right sides of the workpiece and multiple valve holes on the three sides can be processed. The process processing is highly integrated, which can effectively avoid errors caused by multiple clamping and ensure the consistency of subsequent key honing processes. In addition, the clamp can clamp two workpieces at a time for processing, which greatly improves the processing efficiency and processing quality.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a multi-way valve body machining center fixture, which is characterized in that: it includes a base plate, the base plate is fixedly connected to the machining center workbench, two sets of fixtures are provided on the front side of the base plate, which are respectively arranged at the upper and lower parts of the base plate, the fixture includes a bracket, a pressing seat and an adjustable support nail, the bracket is provided at the bottom of the fixture and is fixedly connected to the base plate, an open groove is provided in the middle of the rear side of the bracket that passes through the upper and lower sides, the bracket is provided with hook-shaped support nails with an axis parallel to the base plate at the left and right ends of the front side of the opening groove, the hook-shaped support nails are connected to the oil groove hole on the lower side of the workpiece The clamping joints are matched and the upper surface is supported by the upper side of the oil tank hole. The clamping seat is provided with two pieces, which are symmetrically arranged at the upper and lower ends of the clamp and fixedly connected to the base plate. The clamping seat at the lower end is clamped in the open groove. The two clamping seats are used to clamp the upper and lower end surfaces of the workpiece. There are 3 adjustable support nails on each clamp, which are respectively arranged on the upper left side, upper right side and lower middle of the two clamping seats. The adjustable support nail is threadedly connected to the base plate, and the height can be adjusted. It is used to support the rear side of the workpiece. By adjusting the height of the adjustable support nail, the front side of the workpiece is in the same vertical plane.

[0006] As a further improvement of the present technology, the pressing seat includes a fixed seat, a sliding seat, a return spring and a pressing bolt;

[0007] An oblique groove is provided on the front side of the fixing seat, and a 90° V-shaped boss with the large end facing the rear side is provided at the bottom of the oblique groove, the upper side of the 90° V-shaped boss is parallel to the lower side of the oblique groove, a threaded hole is provided in the middle of the lower side of the 90° V-shaped boss, and a semicircular groove with an axis parallel to the lower side of the 90° V-shaped boss is provided on both sides of the 90° V-shaped boss, and a first blind hole is provided in the middle of the semicircular groove with an axis parallel to the upper side of the 90° V-shaped boss;

[0008] The rear end of the slide is provided with a 90° V-shaped groove that matches the 90° V-shaped boss, the lower side of the slide is parallel to the upper side of the 90° V-shaped groove, the front side is provided with a bolt hole whose axis is parallel to the upper side of the 90° V-shaped groove, and the lower side of the 90° V-shaped groove is provided with a second blind hole that matches the first blind hole;

[0009] The return spring is provided with two pieces, which are respectively arranged in the first blind hole and the second blind hole corresponding to the left and right sides;

[0010] The 90° V-shaped groove is clamped with the 90° V-shaped boss, the threaded hole is coaxial with the bolt hole, and the clamping bolt passes through the bolt hole and is threadedly connected to the threaded hole; the lower end of the front side of the bracket is provided with an inclined surface parallel to the lower side surface of the 90° V-shaped groove, and the inclined surface is provided with a through hole coaxial with the threaded hole, for a wrench to extend into the through hole to tighten the clamping bolt; a retreat groove is provided on the bracket in the middle of the front side of the opening groove, which passes through the upper and lower sides, and the width of the retreat groove matches the width of the slide.

[0011] As a further improvement of the present technology, a plurality of evenly distributed square pyramidal bosses are provided in the middle of the upper plane of the slide seat to prevent slipping when clamping the workpiece.

[0012] As a further improvement of the present technology, a plurality of square cone tops are provided on the plane of the adjustable support nail for anti-slip.

[0013] As a further improvement of the present technology, the hook-shaped support nail includes a cylindrical portion at the lower end and a hook-shaped portion at the upper end facing the front side, and a coaxial first internal threaded hole is provided in the cylindrical portion;

[0014] The bracket is provided with mounting holes at positions corresponding to the cylindrical parts of the hook-shaped support nails, and a stepped bolt hole is provided on the front side of the mounting hole. A locking bolt is provided in the stepped bolt hole, and the locking bolt is threadedly connected to the first internal threaded hole to lock and fix the hook-shaped support nail.

[0015] As a further improvement of this technology, a first arc-shaped groove is provided at the upper end of the cylindrical part, a cylindrical pin is provided in the first arc-shaped groove for preventing rotation, and a second arc-shaped groove is provided at the upper end of the mounting hole on the bracket to cooperate with the upper part of the cylindrical pin.

[0016] As a further improvement of the present technology, a second internal threaded hole is provided on the base plate at a position corresponding to the adjustable support pin, and a matching adjustment nut is provided on the front side surface of the base plate at a position corresponding to the second internal threaded hole. The adjustable support pin is threadedly connected to the adjusting nut and the second internal threaded hole. The height of the adjustable support pin can be adjusted by rotating the adjusting nut during operation.

[0017] As a further improvement of the present technology, lifting rings are provided on the left and right sides of the upper end of the base plate for lifting the clamp to facilitate installation and disassembly.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention adopts hook-shaped support pins to position the oil groove holes and oil groove surfaces of the workpiece, and the upper and lower clamping seats are relatively clamped, so the blank can be directly loaded and the clamping is completed in one time. The left, front and right sides of the workpiece and multiple valve holes on the three sides can be processed. The process processing has a high degree of integration, which can effectively avoid errors caused by multiple clamping and ensure the consistency of subsequent key honing processes. The fixture can clamp two workpieces at a time for processing, which greatly improves the processing efficiency and processing quality; 2. The adjustable support pins and the sliding seat of the present invention are provided with a number of evenly distributed conical protrusions in an array, which can effectively prevent slipping during clamping and improve the clamping stability of the workpiece; 3. The present invention has a simple structure, is easy to operate, and has a low processing cost, and is worthy of promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of a working state of a workpiece according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the positioning of the hook-shaped support pin and the oil tank hole of the workpiece according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram of a bracket, a pressing seat, and a hook-shaped support pin according to an embodiment of the present invention;

[0023] Figure 5 for Figure 5 Middle AA section view;

[0024] Figure 6 for Figure 5 Middle BB cross-section;

[0025] Figure 7 for Figure 5 Middle CC section view;

[0026] Figure 8 This is a schematic diagram of the explosion structure of the compression seat;

[0027] Figure 9 This is a schematic diagram of the bracket structure according to an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the adjustable support pin structure according to an embodiment of the present invention;

[0029] Figure 11 This is a schematic diagram of the working state of workpiece 2 according to an embodiment of the present invention.

[0030] In the figure: 1, bottom plate, 2, bracket, 201, opening groove, 202, retreat groove, 203, through hole, 204, mounting hole, 205, second arc groove, 206, inclined surface, 3, pressing seat, 301, fixing seat, 3011, inclined groove, 3012, 90° V-shaped boss, 3013, threaded hole, 3014, semicircular arc groove, 3015, first blind hole, 302, sliding seat, 3021, 90° V-shaped groove, 3022, bolt hole, 3023 , second blind hole, 303, tightening bolt, 304, return spring, 4, hook-shaped support pin, 401, cylindrical portion, 402, hook-shaped portion, 403, first internal threaded hole, 404, first arc-shaped groove, 5 (5-1, 5-2, 5-3), adjustable support pin, 6, adjusting nut, 7, lifting bolt, 8, workpiece one, 801, oil tank hole, 802, upper side of oil tank hole, 9, adjusting washer, 10, locking bolt, 11, cylindrical pin, 12, workpiece two. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0033] like Figure 1 、 2As shown in Figure 3, the embodiment of the present invention includes a base plate 1, which is fixedly connected to the workbench of the machining center. Two sets of clamps are provided on the front side of the base plate 1, which are respectively arranged on the upper and lower parts of the base plate 1. The clamps include a bracket 2, a pressing seat 3 and an adjustable support nail 5. The bracket 2 is provided at the bottom of the clamp and is fixedly connected to the base plate 1. An opening groove 201 that passes through the upper and lower sides is provided in the middle of the rear side of the bracket 2. Hook-shaped support nails 4 with axes parallel to the base plate 1 are provided at the left and right ends of the front side of the opening groove 201 on the bracket 2. The support pin 4 is engaged with the oil groove hole 801 on the lower side of the workpiece 8, and the upper surface is supported by the upper side 802 of the oil groove hole. The clamping seat 3 is provided with two pieces, which are symmetrically arranged at the upper and lower ends of the clamp and fixedly connected to the bottom plate 1. The clamping seat 3 at the lower end is clamped in the open groove 201. The two clamping seats 3 are used to clamp the upper and lower end surfaces of the workpiece 8. There are three adjustable support pins 5 on each clamp, which are respectively arranged at the upper left side, upper right side and lower middle between the two clamping seats 3 (see attached Figure 1 The adjustable support pins 5-1, 5-2, and 5-3 are threadedly connected to the base plate 1, and the height can be adjusted to support the rear side of the workpiece 8. By adjusting the height of the adjustable support pins 5, the front side of the workpiece 8 can be in the same vertical plane.

[0034] like Figure 4 、 5 As shown in , 7 and 8, the pressing seat 3 includes a fixed seat 301, a sliding seat 302, a return spring 304 and a pressing bolt 303;

[0035] An oblique groove 3011 is provided on the front side of the fixing seat 301. A 90° V-shaped boss 3012 with its larger end facing rearward is provided at the bottom of the oblique groove 3011. The upper side of the 90° V-shaped boss 3012 is parallel to the lower side of the oblique groove 3011. A threaded hole 3013 is provided in the middle of the lower side of the 90° V-shaped boss 3012, with its axis parallel to the upper side of the 90° V-shaped boss 3012. Semi-circular grooves 3014 are provided on both sides of the 90° V-shaped boss 3012, with their axes parallel to the lower side of the 90° V-shaped boss 3012. A first blind hole 3015 is provided in the middle of the semi-circular groove 3014, with its axis parallel to the upper side of the 90° V-shaped boss 3012.

[0036] A 90° V-shaped groove 3021 is defined at the rear end of the slide 302, which mates with the 90° V-shaped boss 3012. The lower side of the slide 301 is parallel to the upper side of the 90° V-shaped groove 3021. A bolt hole 3022 is defined on the front side of the slide 301, with its axis parallel to the upper side of the 90° V-shaped groove 3021. A second blind hole 3023 is defined on the lower side of the 90° V-shaped groove 3021, which mates with the first blind hole 3015.

[0037] There are two return springs 304, which are respectively arranged in the first blind hole 3015 and the second blind hole 3023 on the left and right sides;

[0038] like Figure 5 、 9 As shown, the 90° V-shaped groove 3021 is clamped with the 90° V-shaped boss 3012, the threaded hole 3013 is coaxial with the bolt hole 3022, and the clamping bolt 303 passes through the bolt hole 3022 and is threadedly connected to the threaded hole 3013; the lower end of the front side of the bracket 2 is provided with an inclined surface 206 parallel to the lower side surface of the 90° V-shaped groove 3021, and the inclined surface 206 is provided with a through hole 203 coaxial with the threaded hole 3013, for a wrench to extend into the through hole 203 to tighten the clamping bolt 303; a retreat groove 202 is provided on the bracket 2 in the middle of the front side of the opening groove 201, which runs through the upper and lower sides, and the width of the retreat groove 202 is matched with the width of the slide 302, so that the slide 302 has enough space to retreat, which is convenient for loading and unloading workpieces.

[0039] like Figure 8 As shown, a plurality of evenly distributed square pyramidal bosses 3024 are provided in the middle of the upper plane of the slide 302 to prevent slipping when clamping the workpiece 8.

[0040] like Figure 10 As shown, a plurality of square pyramidal tops 501 are provided on the upper plane of the adjustable support pin 5 for anti-slip.

[0041] like Figure 6 As shown, the hook-shaped support nail 4 includes a lower cylindrical portion 401 and an upper hook-shaped portion 402 facing the front side, and a coaxial first internal threaded hole 403 is provided in the cylindrical portion 401;

[0042] like Figure 6 、 8 As shown, mounting holes 204 are provided on the bracket 2 at positions corresponding to the cylindrical portion 401 of the hook-shaped support pin 4, and a stepped bolt hole 206 is provided on the front side of the mounting hole 204. A locking bolt 10 is provided in the stepped bolt hole 206, and the locking bolt 10 is threadedly connected to the first internal threaded hole 403 to lock and fix the hook-shaped support pin 4.

[0043] like Figure 6 As shown, a first arc-shaped groove 404 is provided at the upper end of the cylindrical portion 401, and a cylindrical pin 11 for anti-rotation is provided in the first arc-shaped groove 404. A second arc-shaped groove 205 that cooperates with the upper part of the cylindrical pin 11 is provided at the upper end of the mounting hole 204 on the bracket 2.

[0044] like Figure 1 、 10As shown, a second internal threaded hole is provided on the base plate 1 at a position corresponding to the adjustable support pin 5, and a matching adjusting nut 6 is provided on the front side surface of the base plate 1 at a position corresponding to the second internal threaded hole. The adjustable support pin 5 is threadedly connected to the adjusting nut 6 and the second internal threaded hole. The height of the adjustable support pin 5 can be adjusted by rotating the adjusting nut 6 during operation.

[0045] Lifting rings 7 are provided on the left and right sides of the upper end of the base plate 1 for lifting the fixture to facilitate installation and removal.

[0046] like Figure 2 As shown, taking the multi-way valve body 1 as an example, the working method of the embodiment of the present invention is: lower the height of the three adjustable support pins 5, and then press the workpiece 1 8 Figure 2 1. Insert the fixture in the direction shown, so that the oil groove hole 801 on the lower side of the workpiece 8 and the upper side 802 of the oil groove hole are matched with the corresponding hook-shaped support pin 4, and tighten the clamping bolts 303 at the upper and lower ends with a wrench, so that the slides 302 at the upper and lower ends move toward the workpiece 8, thereby locking the workpiece 8. Then use the wrench to rotate the adjusting nut 6 so that the top of the three-piece adjustable support pin 5 is supported by the corresponding bottom surface of the workpiece 8, and the machining center can start processing. After the processing is completed, just loosen the clamping bolt 303 with a wrench, and under the action of the return spring 304, the slides 302 at the upper and lower ends move away from the workpiece 8, thereby loosening the workpiece 8, and then lift the workpiece 8 upward to separate it from the hook-shaped support pin 4, and then the workpiece 8 can be removed. The height of the three-piece adjustable support pin 5 only needs to be adjusted when clamping the workpiece 8 for the first time. It no longer needs to be adjusted when processing the workpiece 8 later. If the workpiece 12 (see attached Figure 11 During the processing of the middle valve body (2), the height of the adjustable support pin 5 needs to be adjusted again.

[0047] The present invention can directly load the blank and complete the clamping in one go. It can process the left, front and right sides of the workpiece and multiple valve holes on the three sides. The process integration is high, which can effectively avoid errors caused by multiple clamping and ensure the consistency of the subsequent key honing process. In addition, the fixture can clamp two workpieces at a time for processing, which greatly improves the processing efficiency and processing quality. The present invention has a simple structure, easy operation and low processing cost. It can also be used for two multi-way valve bodies (see attached Figure 2 Workpiece 8 and attached Figure 11 The method is suitable for processing medium workpiece 2 (12), has strong practicality and is worthy of promotion and application.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-way valve body machining center fixture, characterized by: The invention comprises a base plate, which is fixedly connected to the workbench of the machining center. Two sets of clamps are provided on the front side of the base plate, which are respectively arranged at the upper and lower parts of the base plate. The clamps include a bracket, a pressing seat and an adjustable support nail. The bracket is provided at the bottom of the clamp and is fixedly connected to the base plate. An open groove is provided in the middle of the rear side of the bracket, which passes through the upper and lower sides. Hook-shaped support nails with axes parallel to the base plate are provided at the left and right ends of the front side of the opening groove on the bracket. The shape of the hook-shaped support nail matches the oil groove hole on the lower side of the workpiece, and the upper surface is connected to the oil groove hole. The side is supported, and the clamping seat is provided with two pieces, which are symmetrically arranged at the upper and lower ends of the clamp and fixedly connected to the bottom plate, wherein the clamping seat provided at the lower end is clamped in the open groove, and the two clamping seats are used to clamp the upper and lower end surfaces of the workpiece. The adjustable supporting nails are provided with 3 on each clamp, which are respectively arranged on the upper left side, the upper right side and the middle of the lower end between the two clamping seats. The adjustable supporting nails are threadedly connected to the bottom plate, and the height can be adjusted. It is used to support the rear side of the workpiece. By adjusting the height of the adjustable supporting nails, the front side of the workpiece is in the same vertical plane; The pressing seat includes a fixed seat, a sliding seat, a return spring and a pressing bolt; An oblique groove is provided on the front side of the fixing seat, and a 90° V-shaped boss with the large end facing the rear side is provided at the bottom of the oblique groove, the upper side of the 90° V-shaped boss is parallel to the lower side of the oblique groove, a threaded hole is provided in the middle of the lower side of the 90° V-shaped boss, and a semicircular groove with an axis parallel to the lower side of the 90° V-shaped boss is provided on both sides of the 90° V-shaped boss, and a first blind hole is provided in the middle of the semicircular groove with an axis parallel to the upper side of the 90° V-shaped boss; The rear end of the slide is provided with a 90° V-shaped groove that matches the 90° V-shaped boss, the lower side of the slide is parallel to the upper side of the 90° V-shaped groove, the front side is provided with a bolt hole whose axis is parallel to the upper side of the 90° V-shaped groove, and the lower side of the 90° V-shaped groove is provided with a second blind hole that matches the first blind hole; The return spring is provided with two pieces, which are respectively arranged in the first blind hole and the second blind hole corresponding to the left and right sides; The 90° V-shaped groove is clamped with the 90° V-shaped boss, the threaded hole is coaxial with the bolt hole, and the clamping bolt passes through the bolt hole and is threadedly connected to the threaded hole; the lower end of the front side of the bracket is provided with an inclined surface parallel to the lower side surface of the 90° V-shaped groove, and the inclined surface is provided with a through hole coaxial with the threaded hole, for a wrench to extend into the through hole to tighten the clamping bolt; a retreat groove is provided on the bracket in the middle of the front side of the opening groove, which passes through the upper and lower sides, and the width of the retreat groove matches the width of the slide.

2. A multi-way valve body machining center fixture according to claim 1, characterized in that: A plurality of evenly distributed square pyramidal bosses are arranged in the middle of the upper plane of the slide seat, which are used to prevent slipping when clamping the workpiece.

3. The multi-way valve body machining center fixture according to claim 1, characterized in that: A plurality of square cone tops are provided on the upper plane of the adjustable supporting nail for anti-slip.

4. The multi-way valve body machining center fixture according to claim 1, characterized in that: The hook-shaped supporting nail comprises a cylindrical portion at the lower end and a hook-shaped portion at the upper end facing the front side, wherein a coaxial first internal threaded hole is provided in the cylindrical portion; The bracket is provided with mounting holes at positions corresponding to the cylindrical parts of the hook-shaped support nails, and a stepped bolt hole is provided on the front side of the mounting hole. A locking bolt is provided in the stepped bolt hole, and the locking bolt is threadedly connected to the first internal threaded hole to lock and fix the hook-shaped support nail.

5. A multi-way valve body machining center fixture according to claim 4, characterized in that: A first arc-shaped groove is provided at the upper end of the cylindrical portion, a cylindrical pin for anti-rotation is provided in the first arc-shaped groove, and a second arc-shaped groove matching the upper part of the cylindrical pin is provided at the upper end of the mounting hole on the bracket.

6. The multi-way valve body machining center fixture according to claim 1, characterized in that: A second internal threaded hole is provided on the base plate at a position corresponding to the adjustable support pin, and a matching adjustment nut is provided on the front side of the base plate at a position corresponding to the second internal threaded hole. The adjustable support pin is threadedly connected to the adjustment nut and the second internal threaded hole. The height of the adjustable support pin can be adjusted by rotating the adjustment nut during operation.

7. The multi-way valve body machining center fixture according to claim 1, characterized in that: The left and right sides of the upper end of the bottom plate are provided with lifting rings for lifting the clamp to facilitate installation and disassembly.

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