Combined hydraulic clamp for machining separation and combination surface and spigot surface of bearing cover

Abstract

The utility model discloses a combined hydraulic clamp for processing a separating and combining surface and a spigot surface of a bearing cover, which comprises a clamp bottom plate, a workpiece, a clamping piece and a positioning piece, the workpiece, the clamping piece and the positioning piece are arranged on the clamp bottom plate, the clamping piece comprises a main pressing cylinder, a side pressing cylinder and an auxiliary supporting cylinder, and a main pressing arm is arranged on the main pressing cylinder; the positioning piece comprises a lower positioning block, an end positioning block and a side positioning block, the lower positioning block is arranged below the workpiece, the large face of the workpiece abuts against the side positioning block, and one side of the workpiece abuts against the end positioning block. A workpiece is pressed by the side pressing cylinder, the auxiliary supporting cylinder and the main pressing cylinder in sequence. Centralized production of milling and drilling of tile cover type parts is achieved, the technical problem of multi-procedure centralized production of bearing cover machining is solved, and the equipment utilization rate is greatly increased; and meanwhile, the stability of the product quality is improved, and the Cpk value stably reaches 1.33 or above.

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 a separation and joining surface and a stop surface of a bearing cover. Background Art

[0002] Traditional bearing cover processing uses simple manual clamps or pneumatic (hydraulic) vises to position and clamp the workpiece. Traditional bearing cover manual clamps or pneumatic (hydraulic) vises can only process a single surface or hole. The product quality is unstable, the Cpk value of the process system cannot reach above 1.33, and the production efficiency is low. The equipment occupies a large number of units and 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 fixture for processing the separation and joint surface and the stopper surface of the bearing cover in view of the above-mentioned existing problems, so as to realize the centralized production of "milling surface and drilling hole" of the bearing cover parts, solve the technical problem of centralized production of multiple processes of the bearing cover processing, and greatly improve the utilization rate of the equipment; at the same time, improve the stability of product quality, so that C pk The value is stable and reaches above 1.33.

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

[0005] A combined hydraulic clamp for processing the separation and joint surfaces and stop surfaces of a bearing cover comprises a clamp base plate, a workpiece, a clamping member and a positioning member, wherein the workpiece, the clamping member and the positioning member are arranged on the clamp base plate, the clamping member comprises a main clamping cylinder, a side clamping cylinder and an auxiliary support cylinder, the main clamping cylinder is close to the workpiece, and a main clamping arm is arranged on the main clamping cylinder; the positioning member comprises a lower positioning block, a side positioning block and an end positioning block, the lower positioning block is arranged below the workpiece, the large surface of the workpiece is close to the side positioning block, and one side is close to the end positioning block; the workpiece is pressed sequentially by the side clamping cylinder, the auxiliary support cylinder and the main clamping cylinder.

[0006] Furthermore, the main clamping arm is connected to the intermediate pressure arm, and floating pressure heads are arranged on both sides of the intermediate pressure arm; the main clamping cylinder pulls the main clamping arm to clamp the semicircular spindle hole of the blank surface of the workpiece through the intermediate pressure arm and the floating pressure head.

[0007] Furthermore, the end positioning block positions the side surface of the bolt column on one side of the workpiece, and the auxiliary support cylinder lightly presses the side surface of the bolt column on the other side and immediately locks it to form a rigid support.

[0008] Furthermore, a side pressure head is provided on the side pressure cylinder, and the guide arm is used to ensure that the side pressure head is always in horizontal movement, and the side pressure cylinder pushes the side pressure head to press the two major surfaces of the workpiece.

[0009] Furthermore, side positioning blocks are provided on both sides of the main clamping cylinder, and the side positioning blocks are used to position the two major surfaces of the workpiece.

[0010] Furthermore, the lower positioning block supports the typing surface and the bolt pressing surface of the workpiece.

[0011] Furthermore, a sequence valve for controlling hydraulic action is also arranged on the fixture bottom plate.

[0012] Furthermore, the number of the side clamping cylinders and the side pressure heads is at least two, and the number of the guide arms is at least four.

[0013] Furthermore, the number of the auxiliary support cylinders and the end positioning blocks is at least two.

[0014] Furthermore, the number of the side positioning blocks is at least two.

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

[0016] 1. A combined hydraulic fixture for machining the separation and joint surfaces and stop surfaces of bearing caps. The 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 oil leakage from the joints caused by the tubular structure;

[0017] 2. A combined hydraulic clamp for machining the separation and joint surfaces of the bearing cap, which adopts six-point full positioning and the clamping adopts the main, auxiliary and auxiliary triple clamping to greatly improve the rigidity and stability of the workpiece when it is clamped;

[0018] 3. A combined hydraulic fixture for machining the separation and joint surfaces of the bearing cap, which overlaps the three bases, namely the process base, measurement base and design base, on one surface to reduce the error caused by base conversion;

[0019] 4. A combined hydraulic clamp for machining the separation and stop surfaces of the bearing cap. The main pressing surface adopts a semicircular blank surface, and the pressure head adopts a universal floating pressure head, which ensures that the main pressing force is perpendicular to the positioning surface;

[0020] 5. A combined hydraulic clamp for machining the separation and joining surfaces and stop surfaces of a bearing cover. Multiple processes are completed on the clamp, namely, rough and fine milling of the separation and joining surfaces, chamfering, and rough milling of the stop surfaces. The clamp can solve the common problems in bearing cover machining.

[0021] 6. A combined hydraulic fixture for processing semicircular holes, slip grooves and stop surfaces of bearing caps. By replacing the lower positioning block (7), the side positioning block (4) and the end positioning block (11), various types of bearing caps can be processed.

[0022] 7. The base plate material of a combined hydraulic fixture for processing bearing covers is P20 (3Cr2Mo) with a tempering hardness requirement of HRC22~25. It has small heat treatment deformation, high stability, can withstand high pressure and high heat, and has obvious effects. 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 the separation and joining surfaces and stop surfaces of a bearing cover.

[0024] Figure 2 The present invention is a schematic diagram of the workpiece structure of a combined hydraulic clamp for machining the separation and joining surfaces and stop surfaces of a bearing cover.

[0025] Figure 3 The present invention is a hydraulic principle diagram of a combined hydraulic clamp for machining the separation and joining surfaces and stop surfaces of a bearing cover.

[0026] Reference numerals: 1-side clamping cylinder, 2-side pressure head, 3-main clamping arm, 4-side positioning block, 5-sequence valve, 6-auxiliary support cylinder, 7-lower positioning block, 8-floating pressure head, 9-middle pressure arm, 10-guide arm, 11-end positioning block, 12-clamp bottom plate, 13-main clamping cylinder, 14-reversing valve;

[0027] 21- typing surface, 22- bolt pressing surface, 23- stop surface, 24- bolt hole, 25- two major surfaces, 26- separation and combination surface, 27- bolt column side surface, 28- spindle 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 the separation and joint surfaces and stop surfaces of the bearing cap, such as Figure 1 , Figure 2As shown, it includes a fixture base plate 12, a workpiece, a clamping member and a positioning member, and the workpiece, the clamping member and the positioning member are arranged on the fixture base plate 12, the clamping member includes a main clamping cylinder 13, a side clamping cylinder 1 and an auxiliary support cylinder 6, the main clamping cylinder 13 is close to the workpiece, and a main clamping arm 3 is arranged on the main clamping cylinder 13; the positioning member includes a lower positioning block 7, a side positioning block 4 and an end positioning block 11, the lower positioning block 7 is arranged under the workpiece, the large surface of the workpiece is close to the side positioning block 4, and one side is close to the end positioning block 11; the workpiece is pressed sequentially by the side clamping cylinder 1, the auxiliary support cylinder 6 and the main clamping cylinder 13.

[0031] The main clamping arm 3 is connected to the intermediate clamping arm 9, and floating pressure heads 8 are arranged on both sides of the intermediate clamping arm 9; the main clamping cylinder 13 pulls the main clamping arm 3 to clamp the semicircular blank surface spindle hole 28 of the workpiece through the intermediate clamping arm 9 and the floating pressure head 8.

[0032] The end positioning block 11 positions the bolt column side 27 on one side of the workpiece, and the auxiliary support cylinder 6 lightly presses the bolt column side 27 on the other side and immediately locks it to form a rigid support.

[0033] The side pressing cylinder 1 is provided with a side pressing head 2, and the guide arm 10 is used to ensure that the side pressing head 2 is always in horizontal motion. The side pressing cylinder 1 pushes the side pressing head 2 to press the two major surfaces 25 of the workpiece.

[0034] Side positioning blocks 4 are provided on both sides of the main clamping cylinder 13 , and the side positioning blocks 4 are used to position the two large surfaces 25 of the workpiece.

[0035] The lower positioning block 7 supports the typing surface 21 and the bolt pressing surface 22 of the workpiece.

[0036] The fixture bottom plate 12 is also provided with a sequence valve 5 for controlling hydraulic action.

[0037] The number of the side clamping cylinders 1 and the side pressure heads 2 is at least two, and the number of the guide arms 10 is at least four.

[0038] The number of the auxiliary support cylinder 6 and the end positioning block 11 is at least two.

[0039] The number of the side positioning blocks 4 is at least two.

[0040] How it works

[0041] The positioning action is as follows: the bolt pressing surface 22 falls flat on the lower positioning block 7, the bolt column side surface 27 is close to the end positioning block 11, and the two large surfaces 25 are close to the side positioning block 4.

[0042] The clamping action is as follows: the side clamping cylinder 1 pushes the side pressure head 2 to clamp the two large surfaces 25 of the workpiece; the auxiliary support cylinder 6 clamps the bolt column side 27 at the other end of the workpiece and locks it to form a rigid support; the main clamping cylinder 13 pulls the main clamping arm 3 through the middle pressure arm 9 and the floating pressure head 8 to clamp the semicircular blank surface of the main shaft hole 28 of the workpiece.

[0043] Cutting action: milling of separation and joining surface 26; milling of stop surface 23; chamfering 2x45°.

[0044] like Figure 3 As shown, the hydraulic principle is: the electromagnetic reversing valve 14 is energized; the hydraulic oil enters the auxiliary support cylinder 6, the support head extends until it touches the workpiece, and then stops moving immediately and continues to be pressurized until it is locked. At the same time, the hydraulic oil enters the large cavity of the side clamping cylinder 1 to clamp the two large surfaces 25 of the workpiece. Since the piston area of ​​the auxiliary support cylinder 6 is smaller than the piston area of ​​the side clamping cylinder 1, the auxiliary support cylinder 6 can be ensured to act first. When the system pressure rises to the set pressure of 30 bar of the sequence valve 5, the sequence valve opens the hydraulic oil and enters the small cavity of the main clamping cylinder 13 to pull the main clamping arm 3 to clamp the workpiece.

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

[0046] Overlap the three bases, i.e. process base, measurement base and design base, on one surface to reduce the error caused by base conversion;

[0047] The 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;

[0048] The main pressing surface adopts a semicircular blank surface, and the pressing head adopts a universal floating pressing head, which ensures that the main pressing force is perpendicular to the positioning surface;

[0049] Multiple processes are completed on this fixture, namely rough and fine milling of the separation and joining surfaces, chamfering, and rough milling of the stop surfaces. The use of this fixture solves the common problems in bearing cover processing.

[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 clamp for machining the separation and joining surfaces and stop surfaces of a bearing cap, characterized in that: The invention comprises a fixture base plate (12), a workpiece, a clamping member and a positioning member, wherein the workpiece, the clamping member and the positioning member are arranged on the fixture base plate (12); the clamping member comprises a main clamping cylinder (13), a side clamping cylinder (1) and an auxiliary support cylinder (6); the main clamping cylinder (13) is close to the workpiece, and a main clamping arm (3) is arranged on the main clamping cylinder (13); the positioning member comprises a lower positioning block (7), an end positioning block (11) and a side positioning block (4); the lower positioning block (7) is arranged below the workpiece, the large surface of the workpiece is close to the side positioning block (4), and one side is close to the end positioning block (11); the workpiece is pressed sequentially by the side clamping cylinder (1), the auxiliary support cylinder (6) and the main clamping cylinder (13).

2. A combined hydraulic clamp for machining the separation and joining surfaces and stop surfaces of a bearing cap according to claim 1, characterized in that: The main clamping arm (3) is connected to an intermediate pressure arm (9), and floating pressure heads (8) are arranged on both sides of the intermediate pressure arm (9); the main clamping cylinder (13) pulls the main clamping arm (3) to clamp the semicircular main shaft hole (28) of the blank surface of the workpiece through the intermediate pressure arm (9) and the floating pressure head (8).

3. A combined hydraulic clamp for machining the separation and joining surfaces and stop surfaces of a bearing cap according to claim 1, characterized in that: The end positioning block (11) positions the bolt column side surface (27) on one side of the workpiece, and the auxiliary support cylinder (6) lightly presses the bolt column side surface (27) on the other side and immediately locks it to form a rigid support.

4. A combined hydraulic clamp for machining the separation and joining surfaces and stop surfaces of a bearing cap according to claim 1, characterized in that: The side pressing cylinder (1) is provided with a side pressing head (2), and the guide arm (10) is used to ensure that the side pressing head (2) is always in horizontal motion. The side pressing cylinder (1) pushes the side pressing head (2) to press the two major surfaces (25) of the workpiece.

5. A combined hydraulic clamp for machining the separation and joining surfaces and stopper surfaces of a bearing cap according to claim 1, characterized in that: Side positioning blocks (4) are provided on both sides of the main clamping cylinder (13), and the side positioning blocks (4) are used to position two large surfaces (25) of the workpiece.

6. A combined hydraulic clamp for machining the separation and joining surfaces and stopper surfaces of a bearing cap according to claim 1, characterized in that: The lower positioning block (7) supports the bolt pressing surface (22) of the workpiece.

7. A combined hydraulic clamp for machining the separation and joining surfaces and stopper surfaces of a bearing cap according to claim 1, characterized in that: The clamp bottom plate (12) is also provided with a sequence valve (5) for controlling hydraulic action.

8. A combined hydraulic clamp for machining the separation and joining surfaces and stop surfaces of a bearing cap according to claim 1 or 4, characterized in that: The number of the side clamping cylinders (1) and the side pressure heads (2) is at least two, and the number of the guide arms (10) is at least four.

9. A combined hydraulic clamp for machining the separation and joining surfaces and stop surfaces of a bearing cap according to claim 1 or 3, characterized in that: The number of the auxiliary support cylinder (6) and the end positioning block (11) is at least two.

10. A combined hydraulic clamp for machining the separation and joining surfaces and stopper surfaces of a bearing cap according to claim 5, characterized in that: The number of the side positioning blocks (4) is at least two.

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