Combined hydraulic clamp for machining semicircular hole, slip groove and spigot surface of bearing cover

Abstract

The utility model discloses a combined hydraulic clamp for processing a semicircular hole, a slip groove and a spigot surface of a bearing cover, which comprises a clamp bottom plate, a positioning piece, a clamping piece and a workpiece, the workpiece, the positioning piece and the clamping piece are arranged on the clamp bottom plate, the clamping piece comprises an auxiliary supporting cylinder, a side pressing cylinder and a main lever cylinder, and the auxiliary supporting cylinder is arranged below the workpiece; a side pressing cylinder is arranged on the separating and combining surface of the workpiece for pressing; a main shaft hole for a main lever cylinder to press the workpiece is further formed below the workpiece, the positioning piece comprises a round positioning pin and a diamond positioning pin, and the end face of the round positioning pin and the end face of the diamond positioning pin are equal in height to form one-face two-pin full positioning. The bearing cover part boring and finish-milling face centralized production can be achieved, the problem that the perpendicularity quality of a bearing cover spigot pair two large faces and the perpendicularity quality of a spigot pair splitting and combining face are difficult to guarantee are solved, the equipment utilization rate is greatly improved, the number of operators is reduced, and the production cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic clamps for bearing covers, in particular to a combined hydraulic clamp for processing semicircular holes, slip grooves and stop surfaces of bearing covers. Background Art

[0002] The bearing cover processing process is relatively long. When processing the "main bearing hole, slip groove, fine milling of two large surfaces and fine milling of stopper", the traditional process uses manual clamps or hydraulic vises to position and clamp the workpiece. Manual clamps or hydraulic vises can only realize the processing of a single surface or hole at a time. It is difficult to ensure the accuracy of surfaces or holes with positional correlation in the finishing process. The Cpk value of the process system cannot reach 1.33 or above, and the production efficiency is low. The equipment occupies a large number of units, the number of operators is large, and the production cost is high. It is no longer suitable for modern high-quality, high-efficiency, large-scale CNC processing, and cannot meet the company's production and quality requirements. Utility Model Content

[0003] The purpose of the utility model is to provide a combined hydraulic clamp for processing semicircular holes, cava grooves and stop surfaces of bearing covers in response to the above-mentioned problems, so as to realize the centralized production of "boring and fine milling surfaces" of bearing cover parts, solve the problem that it is difficult to ensure the verticality quality of the two major surfaces of the bearing cover stop and the separation and joining surfaces, greatly improve the utilization rate of the equipment, reduce the number of operators, and significantly reduce the production cost.

[0004] The technical solution of the utility model is as follows:

[0005] A combined hydraulic clamp for processing semicircular holes, cava grooves and stop surfaces of bearing caps, comprising a clamp base plate, a positioning member, a clamping member and a workpiece, wherein the workpiece, the positioning member and the clamping member are arranged on the clamp base plate, the clamping member comprises an auxiliary support cylinder, a side clamping cylinder and a main lever cylinder, an auxiliary support cylinder is arranged under the workpiece; a side clamping cylinder is arranged at the separation and joining surface of the workpiece for clamping; a main lever cylinder is also arranged under the workpiece for clamping the main shaft hole of the workpiece, the positioning member comprises a round positioning pin and a diamond positioning pin, the end faces of the round positioning pin and the diamond positioning pin are of the same height, forming a one-side two-pin full positioning.

[0006] Furthermore, a side pressure head is provided on the side clamping cylinder, and the side pressure head presses the two separation and joining surfaces of the workpiece.

[0007] Furthermore, the number of the auxiliary support cylinders is at least two, and the two auxiliary support cylinders lightly press the two major surfaces of the workpiece. When the two auxiliary support cylinders move upward and touch the workpiece, the support head immediately stops (contact force 0.3kg), moves upward and continues to pressurize until it is locked (support force 220kg).

[0008] Furthermore, an adjustment plate is provided at the bolt pressing surface of the workpiece for pressing, and a round positioning pin and a diamond positioning pin are provided on the adjustment plate.

[0009] Furthermore, the round locating pin and the diamond locating pin cooperate with the bolt pressing surface of the workpiece, and the round locating pin and the diamond locating pin locate the bolt hole of the workpiece.

[0010] Furthermore, the main lever cylinder is also provided with a middle pressure arm and a floating pressure head, and the floating pressure head is provided on both sides of the middle pressure arm.

[0011] Furthermore, the main lever cylinder can drive the floating pressure head to press the semicircular surface of the main shaft hole of the workpiece through the intermediate pressure arm.

[0012] Furthermore, a sequence valve for controlling the sequential actions of the clamping cylinders is also provided on the clamp bottom plate.

[0013] Furthermore, the hydraulic system of the power source of the hydraulic clamp is also provided with a reversing valve, a relief valve, a one-way valve, etc.

[0014] Furthermore, the number of the side clamping cylinder, the adjustment plate and the main lever cylinder is at least one.

[0015] Compared with the existing technology, the beneficial effects of the utility model are:

[0016] 1. A combined hydraulic fixture for processing semicircular holes, slip grooves and stop surfaces of bearing caps. The fixture hydraulic system adopts a plate structure, and all pipeline connections are integrated on the fixture bottom plate, which greatly reduces the size of the fixture and avoids the risk of joint oil leakage caused by the tubular structure;

[0017] 2. A combined hydraulic clamp for machining semicircular holes, slip grooves and stop surfaces of bearing caps, which adopts six-point full positioning and main and auxiliary double clamping to greatly improve the rigidity of the workpiece when it is clamped;

[0018] 3. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of bearing caps. The fixture adopts three-base coincidence, i.e., the process datum, measurement datum and design datum coincide on one surface, thus reducing the error caused by datum conversion;

[0019] 4. A combined hydraulic clamp for machining semicircular holes, slip grooves and stop surfaces of bearing caps. The main clamping surface of the workpiece is a semicircular surface. The pressure head adopts a floating pressure head to ensure that the main clamping force is perpendicular to the positioning surface.

[0020] 5. A combined hydraulic clamp for processing semicircular holes, cava grooves and stop surfaces of bearing caps. Multiple processes are completed on the clamp, namely boring semicircular holes, milling cava grooves, fine milling of two large surfaces and fine milling of stop surfaces. The clamp can solve the problem of difficult to ensure the verticality of the bearing cap processing surface and the verticality of the hole surface.

[0021] 6. A combined hydraulic fixture for processing semicircular holes, slip grooves and stop surfaces of bearing caps. By replacing the positioning plate 9 and the positioning pins 5 and 8, various types of bearing caps can be processed.

[0022] 7. A combined hydraulic fixture for machining bearing caps uses P20 (3C Mo) The tempering hardness requirement is HRC22~25. It has small heat treatment deformation, high stability, can withstand high pressure and high heat, and has obvious effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic diagram of the fixture structure of a combined hydraulic fixture for processing a semicircular hole, a slip groove and a stop surface of a bearing cover.

[0024] Figure 2 The present invention is a schematic diagram of the workpiece structure of a combined hydraulic fixture for machining a semicircular hole, a slip groove and a stop surface of a bearing cover.

[0025] Figure 3 The present invention is a hydraulic principle diagram of a combined hydraulic fixture for machining a semicircular hole, a slip groove and a stop surface of a bearing cover.

[0026] Figure numerals: 1-clamp base plate, 2-side clamping cylinder, 3-side pressure head, 4-auxiliary support cylinder, 5-round positioning pin, 6-floating pressure head, 7-intermediate pressure arm, 8-diamond positioning pin, 9-adjustment plate, 10-main lever cylinder, 11-sequence valve, 12-reversing valve;

[0027] 21- stop surface, 22- bolt column side, 23- bolt pressing surface, 24- typing surface, 25- separation and combination surface, 26- slip groove, 27- spindle hole, 28- two large surfaces, 29- bolt hole. DETAILED DESCRIPTION

[0028] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0030] See also Figure 1-3 , a combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of bearing caps, such as Figure 1 , Figure 2 As shown, it includes a fixture base plate 1, a positioning member, a clamping member and a workpiece, wherein the workpiece, the positioning member and the clamping member are arranged on the fixture base plate 1, and the clamping member includes an auxiliary supporting cylinder 4, a side clamping cylinder 2 and a main lever cylinder 10, and an auxiliary supporting cylinder 4 is arranged under the workpiece; a side clamping cylinder 2 is arranged at the separation and joining surface 25 of the workpiece for clamping; a main lever cylinder 10 is also arranged under the workpiece to clamp the spindle hole 27 of the workpiece, and the positioning member includes a round positioning pin 5 and a diamond positioning pin 8, and the end faces of the round positioning pin 5 and the diamond positioning pin 8 are at the same height, forming a one-side two-pin full positioning.

[0031] The side pressing cylinder 2 is provided with a side pressing head 3, and the side pressing head 3 presses the two separation and joining surfaces 25 of the workpiece.

[0032] The number of the auxiliary support cylinders 4 is at least two, and the two auxiliary support cylinders 4 lightly press the two major surfaces 28 of the workpiece respectively and continue to pressurize until they are locked.

[0033] An adjustment plate 9 is provided at the bolt pressing surface 23 of the workpiece for pressing, and a round positioning pin 5 and a diamond positioning pin 8 are provided on the adjustment plate 9 .

[0034] The round positioning pin 5 and the diamond positioning pin 8 cooperate with the bolt pressing surface 23 of the workpiece, and the round positioning pin 5 and the diamond positioning pin 8 locate the bolt hole 29 of the workpiece.

[0035] The main lever cylinder 10 is also provided with a middle pressure arm 7 and a floating pressure head 6 , and the floating pressure head 6 is arranged on both sides of the middle pressure arm 7 .

[0036] The master lever cylinder 10 can drive the floating pressure head 6 to press the semicircular surface of the main shaft hole 27 of the workpiece through the intermediate pressure arm 7.

[0037] The clamp bottom plate 1 is also provided with a sequence valve 11 for controlling the sequential actions of the clamping cylinders.

[0038] The hydraulic system of the power source of the hydraulic clamp is also provided with a reversing valve 12, a relief valve, a one-way valve, etc.

[0039] The number of the side clamping cylinder 2, the adjusting plate 9 and the main lever cylinder 10 is at least one. The fixture base plate 1 can have at least four stations to realize the processing of the workpiece.

[0040] How it works

[0041] The positioning action is as follows: the bolt pressing surface 23 falls flat on the end surfaces of the round positioning pin 5 and the diamond positioning pin 8, and at the same time, the two bolt holes 29 are positioned by the round positioning pin 5 and the diamond positioning pin 8, realizing "one face, two pins, six points full positioning".

[0042] The clamping action is as follows: the side clamping cylinder 2 pushes the side pressure head 3 to clamp the separation and joining surface 25 of the workpiece, the auxiliary support cylinder 4 lightly presses the large surface 28 of the workpiece, and after the system pressure rises to the set pressure of the sequence valve 11, the hydraulic oil enters the auxiliary support cylinder 4 and the valve core is locked to form a rigid support; the main lever cylinder 10 of the other workstation presses the semicircular surface of the main shaft hole 27 of the workpiece through the intermediate pressure arm 7 and the floating pressure head 6; the auxiliary support cylinder 4 lightly presses the other large surface 28 of the workpiece, and after the system pressure rises to the set pressure of the sequence valve 11, the hydraulic oil enters the auxiliary support cylinder 4 and the valve core is locked to form a rigid support.

[0043] Hydraulic principle: Figure 3 As shown, the electromagnetic reversing valve 33 is energized, and the hydraulic oil enters the large chamber of the side clamping cylinder 2 to clamp the separation and joining surface 25 of the workpiece. At the same time, the hydraulic oil enters the auxiliary support cylinder 4. The support head extends until it touches the workpiece and stops moving immediately. When the system pressure rises to the set pressure of 30 bar of the sequence valve 11, the sequence valve opens and the hydraulic oil enters the auxiliary support cylinder 4 and continues to be pressurized until it is locked. The hydraulic principle of the other station is the same as the above process.

[0044] Cutting actions: boring the main bearing hole 27, milling the cava groove 26, fine milling the front side of the two major surfaces 28, fine milling the back side of the two major surfaces 28, and fine milling the stop 21.

[0045] It adopts six-point full positioning, and the clamping adopts main and auxiliary double clamping to greatly improve the rigidity of the workpiece when it is clamped;

[0046] The fixture adopts three-base coincidence, that is, the process benchmark, measurement benchmark and design benchmark are overlapped on one surface, which reduces the error caused by benchmark conversion;

[0047] The clamp hydraulic system adopts a plate structure, and all pipeline connections are integrated on the clamp bottom plate, which greatly reduces the clamp volume and avoids the risk of joint oil leakage caused by the tubular structure;

[0048] The main pressing surface of the workpiece is a semicircular surface, and the pressure head adopts a floating pressure head to ensure that the main pressing force is perpendicular to the positioning surface;

[0049] Multiple processes are completed on this fixture, namely boring semicircular holes, milling slots, fine milling of two large surfaces and fine milling of stoppers. The use of this fixture solves the problem of difficult to ensure the verticality of the bearing cover processing surface and the verticality of the hole surface.

[0050] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of bearing caps, characterized in that: The invention comprises a fixture base plate (1), a positioning member, a clamping member and a workpiece, wherein the workpiece, the positioning member and the clamping member are arranged on the fixture base plate (1), the clamping member comprises an auxiliary support cylinder (4), a side clamping cylinder (2) and a main lever cylinder (10), the auxiliary support cylinder (4) is arranged under the workpiece; a side clamping cylinder (2) is arranged at the separation and joining surface (25) of the workpiece for clamping; a main lever cylinder (10) is also arranged under the workpiece for clamping a main shaft hole (27) of the workpiece, the positioning member comprises a round positioning pin (5) and a diamond positioning pin (8), the end faces of the round positioning pin (5) and the diamond positioning pin (8) are of the same height, forming a one-side two-pin full positioning.

2. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of bearing caps according to claim 1, characterized in that: The side pressing cylinder (2) is provided with a side pressing head (3), and the side pressing head (3) presses two separation and joining surfaces (25) of the workpiece.

3. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of bearing caps according to claim 1, characterized in that: The number of the auxiliary support cylinders (4) is at least two, and the two auxiliary support cylinders (4) respectively lightly press the two major surfaces (28) of the workpiece.

4. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of bearing caps according to claim 1, characterized in that: An adjustment plate (9) is provided at the bolt pressing surface (23) of the workpiece for pressing, and a round positioning pin (5) and a diamond positioning pin (8) are provided on the adjustment plate (9).

5. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of bearing caps according to claim 4, characterized in that: The round positioning pin (5) and the diamond positioning pin (8) cooperate with the bolt pressing surface (23) of the workpiece, and the round positioning pin (5) and the diamond positioning pin (8) locate the bolt hole (29) of the workpiece.

6. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of bearing caps according to claim 1, characterized in that: The main lever cylinder (10) is also provided with a middle pressure arm (7) and a floating pressure head (6), and the floating pressure head (6) is arranged on both sides of the middle pressure arm (7).

7. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of a bearing cap according to claim 6, characterized in that: The main lever cylinder (10) can drive the floating pressure head (6) to press the semicircular surface of the main shaft hole (27) of the workpiece through the intermediate pressure arm (7).

8. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of a bearing cap according to claim 1, characterized in that: The clamp base plate (1) is also provided with a sequence valve (11) for controlling the sequential movements of the clamping cylinders.

9. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of bearing caps according to any one of claims 1 to 8, characterized in that: The hydraulic system of the power source of the hydraulic clamp is also provided with a reversing valve (12), a relief valve, and a one-way valve.

10. A combined hydraulic fixture for machining semicircular holes, slip grooves and stop surfaces of a bearing cap according to claim 9, characterized in that: The number of the side clamping cylinder (2), the adjustment plate (9) and the main lever cylinder (10) is at least one.

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