Tool assembly for machining crankcase of air compressor

Abstract

The tool assembly comprises a base and a plurality of machining stations, each machining station comprises a limiting base, a front side pressing structure and a rear side pressing structure, each front side pressing structure comprises a front side oil hydraulic cylinder and a front side pressing head, and each rear side pressing structure comprises a rear side oil hydraulic cylinder and a rear side pressing head. A machining window is formed in the bottom of the limiting seat, a hollowed-out part is arranged on the base, the machining window corresponds to the hollowed-out part, the limiting seat is covered with the bottom of the crankcase in a buckled mode, the front side pressing head abuts against the edge of the front end of the crankcase in a pressed mode, the rear side pressing head abuts against the edge of the rear end of the crankcase in a pressed mode, the distance between every two adjacent machining positions is D, and the length of the base is L, the contact length of the front side pressure head and the crankcase is L1, the contact length of the front side pressure head and the crankcase is L2, the contact length of the rear side pressure head and the crankcase is L3, the contact length of the rear side pressure head and the crankcase is L4, and D is equal to a * L, L1 is equal to b * L2, and L3 is equal to c * L4. A plurality of machining stations are arranged, so that a plurality of crankcases can be machined, the replacement time of the crankcases is shortened, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to a tooling for a machining center, in particular to a tooling assembly for machining a crankcase of an air compressor. Background Art

[0002] After the casting of the hollow compressor crankcase in the prior art is completed, the crankcase needs to be placed in the machining center for cylinder end surface processing. For example, the utility model patent with Chinese patent number CN202320492548.7, published on March 9, 2023, discloses a piston compressor small Bama crankcase tooling. The tooling includes a fixed platform, the fixed platform includes a transition flange, a flange plate and a positioning core mold, the transition flange is set as the base of the tooling, the flange plate is bolted to the top of the transition flange, and the positioning core mold is bolted to the top of the flange plate; the tooling is also provided with a clamping assembly, the clamping assembly is arranged on one side of the positioning core mold; the clamping assembly includes a clamping plate for clamping and a screw for fixing the clamping plate, the screw is fixedly connected to the middle of one side of the positioning core mold, the clamping plate is plugged into the screw, and one end of the clamping plate abuts against the screw head, and the other end is close to the positioning core shaft. By adding a clamping assembly to the middle of the side of the positioning core mold, the concentricity of the motor stop and the middle bearing position can be ensured without vibration during processing. The above tooling can only process one crankcase at a time, with low work efficiency and cannot meet the three-sided processing requirements of the crankcase. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a tooling assembly for processing an air compressor crankcase with high processing efficiency and high processing precision.

[0004] According to the present invention, a tooling assembly for processing an air compressor crankcase comprises a base and a plurality of processing positions arranged on the base, each of the processing positions comprises a limit seat, a front clamping structure and a rear clamping structure installed on the base, the front clamping structure comprises a front hydraulic cylinder and a front pressure head driven by the front hydraulic cylinder, the rear clamping structure comprises a rear hydraulic cylinder and a rear pressure head driven by the rear hydraulic cylinder, a processing window is formed on the bottom of the limit seat, and a hollow window is arranged on the base. The processing window corresponds to the hollow portion, the bottom cover of the crankcase is on the limit seat, the front pressure head is pressed against the front edge of the crankcase, and the rear pressure head is pressed against the rear edge of the crankcase. The spacing between adjacent processing positions is D, the length of the base is L, the length of the front pressure head in contact with the crankcase is L1, the length of the front pressure head is L2, the length of the rear pressure head in contact with the crankcase is L3, and the length of the rear pressure head is L4.

[0005] D = a*L, where a is the preset ratio value, and the value range of a is 0.10-0.20.

[0006] L1=b*L2, where b is the preset ratio value, and the value range of b is 0.15-0.35.

[0007] L3=c*L4, where c is a preset ratio value, and the value range of c is 0.08-0.15.

[0008] A tooling assembly for processing an air compressor crankcase provided by the present invention also has the following subsidiary technical features:

[0009] It further includes that a plurality of latching grooves are arranged on the front side of the base, and the side walls of the crankcase are latched into the latching grooves.

[0010] It further includes that a plurality of limiting protrusions are arranged on the top of the limiting seat, and the limiting protrusions are pressed against the side wall of the crankcase.

[0011] It further includes that a limiting boss is arranged on the top of the limiting seat, and the bottom of the crankcase rests on the limiting boss.

[0012] It further includes that each of the processing positions includes two front side clamping structures and one rear side clamping structure, and the front side pressure heads in the two front side clamping structures are respectively pressed against the front side edges of the crankcase.

[0013] It further includes that two adjacent processing positions share a front side clamping structure, and two ends of a front side pressure head in the front side clamping structure are respectively pressed against the front end edges of the two crankcases.

[0014] It further includes lines W1 and W2 connecting the front hydraulic cylinders in the two front clamping structures and the rear hydraulic cylinders in the rear clamping structure, and the angle formed by the line W1 and the line W2 is 45 degrees to 50 degrees.

[0015] Further comprising: the length of the hollow portion is H1, the width of the base is H2, then

[0016] H1=d*H2, where d is a preset ratio value, and the value range of d is 0.40-0.50.

[0017] It further includes that the vertical distance between the front hydraulic cylinder and the rear hydraulic cylinder is H3, and the width of the base is H2, then H3=e*H2, wherein e is a preset ratio value, and the value range of e is 0.60-0.70.

[0018] It further includes that the number of the processing positions is 3-7.

[0019] Compared with the prior art, the tooling assembly for processing the crankcase of an air compressor provided by the present invention has the following advantages: first, the present invention is provided with multiple processing positions, which can process multiple crankcases, reduce the time for changing crankcases, and improve work efficiency. Second, each processing position can process the top surface, side surface and bottom surface of the crankcase, and there is no need to re-clamp the crankcase during processing, thereby ensuring the accuracy of each processing surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the front view of the present invention.

[0021] Figure 2 It is a rear view of the present invention.

[0022] Figure 3 It is a bottom view of the present invention.

[0023] Figure 4 It is a left view of the present invention.

[0024] Figure 5 It is a stereogram of the present invention.

[0025] Figure 6 It is a three-dimensional exploded view of the tooling assembly and the crankcase of the present invention.

[0026] Figure 7 It is a three-dimensional exploded view of the present invention.

[0027] Figure 8 It is a three-dimensional diagram of the limiting seat in the present invention. DETAILED DESCRIPTION

[0028] In order to clearly illustrate the scheme in the present invention, preferred embodiments are given below and described in detail with reference to the accompanying drawings. The following description is essentially only exemplary and is not intended to limit the application or use of the present disclosure. It should be understood that in all the drawings, corresponding reference numerals represent the same or corresponding parts and features.

[0029] like Figures 1 to 8As shown, the present invention provides a tooling assembly for processing an air compressor crankcase, comprising a base 1 and a plurality of processing positions 2 arranged on the base 1, each of the processing positions 2 comprising a limit seat 21 installed on the base 1, a front clamping structure 22 and a rear clamping structure 23, the front clamping structure 22 comprising a front hydraulic cylinder 221 and a front pressure head 222 driven by the front hydraulic cylinder 221, the rear clamping structure 23 comprising a rear hydraulic cylinder 231 and a rear pressure head 232 driven by the rear hydraulic cylinder 231, a processing window 211 is formed at the bottom of the limit seat 21, a hollow portion 11 is arranged on the base 1, the processing window 211 corresponds to the hollow portion 11, the bottom cover of the crankcase 10 is on the limit seat 21, the front pressure head 222 presses against the front end edge of the crankcase 10, and the rear pressure head 232 presses against the rear end edge of the crankcase 10. The crankcase in the present invention is used in an air compressor, and is mainly used to install a cylinder and a crank transmission mechanism. The crankcase 10 is L-shaped as a whole, so it is necessary to process the related structures on the top, bottom and side surfaces of the crankcase, and at the same time, the parallelism and verticality between the related structures on these three surfaces must be ensured, which requires high precision. The front side clamping structure 22 and the rear side clamping structure 23 in the present invention are in contact with the edge of the crankcase 10, which can expose the processing surface, which is convenient for processing. At the same time, the crankcase 10 is buckled on the limit seat 21, and the limit seat 21 plays a supporting role, which is convenient for fixing the crankcase 10. In order to process the bottom surface of the crankcase, a processing window 211 is set on the limit seat 21 and a hollow part 11 is set on the base 1, so that the bottom surface processing part of the crankcase is exposed, which is convenient for processing. Therefore, the processing position 2 of the present invention can fix the crankcase 10, and all processing can be completed without re-clamping the crankcase during the entire processing process, which can effectively improve the precision between the three processing surfaces. The present embodiment has five processing positions 2, which can simultaneously clamp five crankcases 10. Therefore, five crankcases can be processed at one time, which greatly improves production efficiency and reduces processing costs. In addition, the present invention uses a hydraulic cylinder to drive the pressure head, which can realize rapid replacement of crankcases and has better stability.

[0030] In this embodiment, the distance between adjacent processing positions 2 is D, the length of the base 1 is L, the length of the front pressure head 222 in contact with the crankcase 10 is L1, the length of the front pressure head 222 is L2, the length of the rear pressure head 232 in contact with the crankcase 10 is L3, and the length of the rear pressure head 232 is L4.

[0031] D=a*L, where a is a preset ratio value, the value range of a is 0.10-0.20, and a in this embodiment is 0.16.

[0032] L1=b*L2, where b is a preset ratio value, and the value range of b is 0.15-0.35. In this embodiment, the front side pressure head 222 has two structures. One is the middle front side pressure head 222 located between two processing positions. The middle front side pressure head 222 extends two pressing parts to both sides, which can press the workpieces of the two processing positions at the same time, that is, adjacent processing positions share a front side pressure head. In the middle front side pressure head, b is 0.25. The second type of front side pressure head is the side front side pressure head 222' located on both sides, and its b is 0.32.

[0033] L3=c*L4, where c is a preset ratio value, and the value range of c is 0.08-0.15. In this embodiment, c is 0.10.

[0034] In the present invention, the spacing D between the processing positions 2 is set according to the length of the base 1, which can better take into account the number of processing positions 2, so that the layout of the processing positions 2 is more reasonable. If the length of the front side pressure head 222 in contact with the crankcase to be processed is too short, the force of pressing and fixing is insufficient, which is easy to cause loosening. If the contact length is too long, it will affect the processing of the crankcase. Therefore, the present invention limits the contact length L1 to the above relationship, which is not only convenient for processing, but also firmly fixed and will not loosen. Similarly, if the length of the rear side pressure head 232 in contact with the crankcase to be processed is too short, the force of pressing and fixing is insufficient, which is easy to cause loosening. If the contact length is too long, it will affect the processing of the crankcase. Therefore, the present invention limits the contact length L3 to the above relationship, which is not only convenient for processing, but also firmly fixed and will not loosen. The present invention adopts a three-point fixing method, which makes the crankcase 10 more stable, does not move during the processing, and improves the processing accuracy.

[0035] See also Figures 1 to 8 In the above embodiment of the present invention, a plurality of latching grooves 12 are further provided on the front side of the base 1, and the side walls of the crankcase 10 are latched into the latching grooves 12. The latching grooves 12 play a role in fixing the crankcase 10 so that the crankcase 10 will not deviate, which is beneficial to processing and improves processing accuracy.

[0036] See also Figures 1 to 8 In the above embodiment given by the present invention, it is further included that a plurality of limiting protrusions 24 are arranged on the top of the limiting seat 21, and the limiting protrusions 24 are pressed against the side wall of the crankcase 10. There are two limiting protrusions 24 in this embodiment, which are respectively located on both sides of the limiting seat 21. The inner side surface of the limiting protrusion 24 is consistent with the outer surface of the side wall of the crankcase, and can be closely attached to the side wall of the crankcase 10, playing a limiting role, preventing the crankcase 10 from deflecting, and improving the processing accuracy.

[0037] See also Figures 1 to 8In the above embodiment of the present invention, a limiting boss 25 is further provided on the top of the limiting seat 21, and the bottom of the crankcase 10 rests on the limiting boss 25. The limiting boss 25 has the same shape as the bottom of the crankcase 10, and can be closely attached to the bottom of the crankcase 10, so as to play a limiting role, prevent the crankcase 10 from deflecting, and improve the processing accuracy.

[0038] See also Figures 1 to 8 In the above embodiment of the present invention, each processing position 2 includes two front clamping structures 22 and one rear clamping structure 23, and the front pressure heads 222 in the two front clamping structures 22 are respectively pressed against the front side edges of the crankcase 10. The present invention adopts a three-point pressing method, which is more stable and not easy to fall off.

[0039] See also Figures 1 to 8 In the above embodiment of the present invention, two adjacent processing positions 2 share one front side clamping structure 22, and the two ends of the front side pressing head 222 in the front side clamping structure 22 are respectively pressed against the front end edges of the two crankcases 10. The two ends of the front side pressing head 222 located between the two processing positions 2 extend to form two pressing portions, which can respectively press against the crankcases 10 on the two processing positions 2, thereby saving the number of the front side clamping structures 22.

[0040] See also Figures 1 to 8 In the above embodiment provided by the present invention, the connecting lines W1 and W2 between the front hydraulic cylinder 221 in the two front clamping structures 22 and the rear hydraulic cylinder 231 in the rear clamping structure 23, the angle θ formed by the connecting line W1 and the connecting line W2 is 45 degrees to 50 degrees. In this embodiment, it is 48 degrees. The above three-point pressing position is more reasonable, and it is also convenient for taking and placing the crankcase 10, and convenient for processing.

[0041] See also Figures 1 to 8 In the above embodiment of the present invention, the length of the hollow portion 11 is H1, and the width of the base 1 is H2.

[0042] H1=d*H2, where d is a preset ratio value, and the value range of d is 0.40-0.50. In this embodiment, d is 0.46. In the present invention, if the hollow portion 11 is too long, the strength of the base 1 will be reduced, and if it is too long, it will be difficult to process. The above relationship can better take into account the requirements of these two aspects and achieve the best.

[0043] See also Figures 1 to 8In the above embodiment given by the present invention, the vertical distance between the front hydraulic cylinder 221 and the rear hydraulic cylinder 231 is H3, and the width of the base 1 is H2, then H3 = e*H2, where e is a preset ratio value, and the value range of e is 0.60-0.70. In this embodiment, e is 0.63. The distance between the front and rear hydraulic cylinders in the present invention is set by the above relationship, and the structure is more reasonable, which is convenient for pressing against the crankcase 10 and is also conducive to taking and placing the crankcase 10.

[0044] See also Figures 1 to 8 In the above embodiment provided by the present invention, the number of the processing positions 2 is 3-7. In this embodiment, the number of the processing positions 2 is 5. The processing efficiency can be effectively improved.

[0045] In summary, the above contents are only embodiments of the present invention, which are only used to illustrate the principles of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tooling assembly for processing an air compressor crankcase, characterized in that: It includes a base and a plurality of processing positions arranged on the base, each of the processing positions includes a limit seat installed on the base, a front clamping structure and a rear clamping structure, the front clamping structure includes a front hydraulic cylinder and a front pressure head driven by the front hydraulic cylinder, the rear clamping structure includes a rear hydraulic cylinder and a rear pressure head driven by the rear hydraulic cylinder, a processing window is formed at the bottom of the limit seat, a hollow portion is arranged on the base, the processing window corresponds to the hollow portion, the bottom cover of the crankcase is on the limit seat, the front pressure head presses against the front end edge of the crankcase, the rear pressure head presses against the rear end edge of the crankcase, the spacing between adjacent processing positions is D, the length of the base is L, the length of the front pressure head in contact with the crankcase is L1, the length of the front pressure head is L2, the length of the rear pressure head in contact with the crankcase is L3, and the length of the rear pressure head is L4. D = a*L, where a is the preset ratio value, and the value range of a is 0.10-0.

20. L1=b*L2, where b is the preset ratio value, and the value range of b is 0.15-0.

35. L3=c*L4, where c is a preset ratio value, and the value range of c is 0.08-0.

15.

2. A tooling assembly for processing an air compressor crankcase according to claim 1, characterized in that: A plurality of latching grooves are arranged on the front side of the base, and the side walls of the crankcase are latched into the latching grooves.

3. A tooling assembly for processing an air compressor crankcase according to claim 1, characterized in that: A plurality of limiting protrusions are arranged on the top of the limiting seat, and the limiting protrusions are pressed against the side wall of the crankcase.

4. A tooling assembly for processing an air compressor crankcase according to claim 1, characterized in that: A limiting boss is arranged on the top of the limiting seat, and the bottom of the crankcase rests on the limiting boss.

5. A tooling assembly for processing an air compressor crankcase according to claim 1, characterized in that: Each of the processing positions includes two front side clamping structures and one rear side clamping structure, and the front side pressure heads in the two front side clamping structures are pressed against the edges on both sides of the front end of the crankcase respectively.

6. A tooling assembly for processing an air compressor crankcase as claimed in claim 5, characterized in that: Two adjacent processing positions share one front side clamping structure, and two ends of a front side pressure head in the front side clamping structure are respectively pressed against the front end edges of the two crankcases.

7. A tooling assembly for processing an air compressor crankcase as claimed in claim 5, characterized in that: The connecting lines W1 and W2 between the front hydraulic cylinders in the two front clamping structures and the rear hydraulic cylinders in the rear clamping structure, the angle formed by the connecting line W1 and the connecting line W2 is 45 degrees to 50 degrees.

8. A tooling assembly for processing an air compressor crankcase as claimed in claim 1, characterized in that: The length of the hollow portion is H1, and the width of the base is H2. H1=d*H2, where d is a preset ratio value, and the value range of d is 0.40-0.

50.

9. A tooling assembly for processing an air compressor crankcase as claimed in claim 1, characterized in that: The vertical distance between the front hydraulic cylinder and the rear hydraulic cylinder is H3, and the width of the base is H2, then H3=e*H2, wherein e is a preset ratio value, and the value range of e is 0.60-0.

70.

10. A tooling assembly for processing an air compressor crankcase according to claim 1, characterized in that: The number of processing positions is 3-7.

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