A machining center fixture for steel counterweight

Abstract

The utility model belongs to tool fixture technical field relates to a machining center clamp of steel balance weight. The utility model, including the bottom plate, be equipped with a plurality of steel balance weight installation positioning structure along the bottom plate center line symmetry on the bottom plate, the bottom plate front and back two sides are respectively equipped with a positioning cylinder fixed plate. The utility model in the using process, through the symmetrical layout's steel balance weight installation positioning structure, can install and fix 8 workpieces in disposable, greatly reduce the clamping frequency, the machining efficiency is improved significantly, through the steel balance weight installation positioning structure, positioning abutment fixed part and the synergies of down -pressing clamping structure, accurate restriction workpiece along Z axle direction's movement and along X axle, Y axle's rotation three key degrees of freedom, ensure that workpiece is not in the processing process and deviates.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixture technology, and relates to a machining center fixture for a steel balance block. Background Technology

[0002] The compressor is the heart of the refrigeration system, and the balance block is a key component that maintains dynamic balance when the compressor motor rotor rotates at high speed. When a refrigeration compressor operates, the rotor drives an eccentric crankshaft to rotate. The rotating crankshaft drives a piston fitted on its eccentric part to compress low-temperature, low-pressure refrigerant gas, thereby discharging high-temperature, high-pressure refrigerant gas into the exhaust pipe, thus realizing the refrigeration cycle of compression → condensation → expansion → evaporation and heat absorption. During the refrigeration cycle, the eccentric rotation of the piston causes uneven forces on the entire system, easily generating vibration and noise. To balance the forces acting on the compressor, a balance block is added to the rotor end to maintain force balance throughout the system. The function and purpose of the balance block is to offset the uneven forces caused by the eccentric rotation to a certain extent, keeping the system balanced and achieving the goals of reducing noise, vibration, and energy consumption. With the continuous research, development, and application of compressors featuring new technologies such as energy saving, quiet operation, frequency conversion, and dual-core technology, the requirements for the dimensional accuracy of the balance block, as its core component, are constantly increasing. High precision is the future development trend of balance blocks. Meanwhile, with the expansion of production scale, the demand for processing efficiency of balance block products is constantly increasing, making the research and development of high-efficiency and high-precision tooling fixtures very important.

[0003] Therefore, there is an urgent need to design a machining center fixture for steel balance blocks that can be used to machine two holes on the upper surface and mill two sides, as well as a steel balance block that can clamp multiple parts at once to improve efficiency and machining accuracy.

[0004] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a clamping fixture for a balance block [application number: 201410529741.9], which includes a left clamping arm, a right clamping arm, a locking nut, and a lifting ring. The left and right clamping arms are movably hinged together by a connecting piece to form a clamping structure. One end of the clamping structure is the clamping end, and the other end is the locking end. The locking nut is located at the locking end, and the lifting ring is threadedly connected to the locking nut through a machined external thread. A lifting structure is provided between the left and right clamping arms. However, this solution is not suitable for machining centers, and it cannot clamp multiple parts at once, resulting in low efficiency and generally poor machining accuracy. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a machining center fixture for steel balance blocks.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A machining center fixture for steel balance blocks includes a base plate with several steel balance block mounting and positioning structures symmetrically arranged along the center line of the base plate. A positioning cylinder fixing plate is mounted on each of the front and rear sides of the base plate. The positioning cylinder fixing plate has a positioning abutment fixing member that can reciprocate linearly in the horizontal direction on the side closer to the steel balance block mounting and positioning structure, and a horizontal drive assembly for driving the positioning abutment fixing member on the side farther away from the steel balance block mounting and positioning structure. The base plate also has a downward clamping structure that can reciprocate linearly in the vertical direction, and the downward clamping structure corresponds to the position of the steel balance block mounting and positioning structure.

[0008] In the above-mentioned machining center fixture for steel balance blocks, the steel balance block mounting and positioning structure includes eight positioning mandrels set on the base plate. A pad is sleeved on the outside of the positioning mandrel, the positioning mandrel passes through the pad, and the top of the positioning mandrel and the top surface of the pad form an annular step.

[0009] In the aforementioned machining center fixture for a steel balance block, the positioning mandrel is fixed to the base plate by an M8×50 hexagon socket head cap screw, and the positioning mandrel and the downward clamping structure are staggered.

[0010] In the above-mentioned machining center fixture for a steel balance block, the positioning and abutting fixing component includes four positioning push blocks disposed on the side of the positioning cylinder fixing plate near the positioning mandrel. The positioning push blocks have workpiece alignment slots with openings facing the positioning mandrel, and the positioning push blocks and the downward clamping structure are staggered.

[0011] In the above-mentioned machining center fixture for steel balance blocks, the horizontal drive assembly includes four positioning cylinders disposed on the side of the positioning cylinder fixing plate away from the positioning mandrel. The piston rod of the positioning cylinder passes through the positioning cylinder fixing plate and the end of the positioning cylinder piston rod is equipped with a connecting screw. The connecting screw is connected to the positioning push block by a slider.

[0012] In the aforementioned machining center fixture for a steel balance block, the tail of the slider is provided with a slot for engaging with a connecting screw, and the head is provided with a dovetail groove for interference fit with the dovetail of the positioning push block.

[0013] In the above-mentioned machining center fixture for a steel balance block, a guide rail is mounted on the base plate, the slider slides in cooperation with the guide rail, a guide rail pad is mounted between the guide rail and the base plate, and the guide rail pad is fixed to the base plate by a cylindrical pin.

[0014] In the aforementioned machining center fixture for a steel balance block, the downward clamping structure includes ten cylinder rods mounted on a base plate. A cylinder pressure bar is mounted on the top of each cylinder rod, and the cylinder pressure bar is fixed to the cylinder rod by a pressure bar cylindrical pin.

[0015] In the above-mentioned machining center fixture for steel balance blocks, the cross-section of the cylinder tie rod is rectangular, ten clamping cylinders are provided below the base plate, the piston rod of the clamping cylinder is connected to the cylinder tie rod, and four M6×70 socket head cap screws for supporting the cylinder pressure bar are symmetrically installed on the left and right ends of the top surface of the base plate.

[0016] In the above-mentioned machining center fixture for steel balance blocks, the bottom of the base plate is provided with several equal-height blocks, and the equal-height blocks are fixed to the base plate by screws.

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] 1. This utility model uses a symmetrically arranged steel balance block installation and positioning structure to install and fix 8 workpieces at one time, which greatly reduces the number of clamping times and significantly improves processing efficiency.

[0019] 2. This utility model precisely restricts the workpiece's movement along the Z-axis and rotation along the X and Y axes through the synergistic effect of the steel balance block installation and positioning structure, the positioning and fixing parts, and the downward clamping structure, ensuring that the workpiece does not deviate during the processing.

[0020] 3. This utility model adopts a two-way clamping design in both the horizontal and vertical directions, combined with a high-precision positioning component, to effectively avoid the influence of processing vibration on the workpiece and ensure the dimensional accuracy and surface quality of the hole processing.

[0021] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a top view of the present invention.

[0024] Figure 3 yes Figure 2 Cross-sectional view at point BB.

[0025] Figure 4 yes Figure 2 Cross-sectional view at point AA.

[0026] In the diagram: 1. Base plate; 2. Steel balance block mounting and positioning structure; 3. Positioning cylinder fixing plate; 4. Positioning abutment fixing component; 5. Horizontal drive assembly; 6. Downward clamping structure; 7. Positioning mandrel; 8. Pad plate; 9. M8×50 socket head cap screw; 10. Positioning push block; 11. Workpiece alignment slot; 22. Positioning cylinder; 3. Connecting screw; 4. Slider; 5. Slot; 6. Card slot; 7. Dovetail groove; 8. Guide rail; 9. Guide rail pad plate; 10. Cylinder pull rod; 11. Cylinder pressure bar; 12. Pressure bar cylindrical pin; 13. Clamping cylinder; 14. M6×70 socket head cap screw; 15. Equal height block. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1-4 As shown, a machining center fixture for steel balance blocks includes a base plate 1. The base plate 1 is provided with a plurality of steel balance block mounting and positioning structures 2 symmetrically arranged along the center line of the base plate 1. A positioning cylinder fixing plate 3 is respectively installed on the front and rear sides of the base plate 1. The positioning cylinder fixing plate 3 is provided with a positioning abutment fixing member 4 that can reciprocate linearly in the horizontal direction on the side of the positioning cylinder fixing plate 3 near the steel balance block mounting and positioning structure 2. The positioning cylinder fixing plate 3 is provided with a horizontal driving component 5 for driving the positioning abutment fixing member 4 on the side of the positioning cylinder fixing plate 3 away from the steel balance block mounting and positioning structure 2. The base plate 1 is also provided with a downward clamping structure 6 that can reciprocate linearly in the vertical direction. The downward clamping structure 6 corresponds to the position of the steel balance block mounting and positioning structure 2.

[0029] In this embodiment, the fixture uses the base plate 1 as the basic carrier, and the whole is designed symmetrically along the center line of the base plate 1. This symmetrical layout can ensure that the fixture is evenly distributed when under force, reducing the risk of deformation during processing. Several steel balance block mounting and positioning structures 2 are provided on the base plate 1. These structures are the core areas for workpiece placement and initial positioning. On the front and rear sides of the base plate 1, a positioning cylinder fixing plate 3 is fixedly installed. The side of the positioning cylinder fixing plate 3 closest to the steel balance block mounting and positioning structure 2 is provided with a positioning abutment fixing member 4. This fixing member can reciprocate linearly in the horizontal direction to position and clamp the workpiece from the horizontal direction. The side of the positioning cylinder fixing plate 3 away from the steel balance block mounting and positioning structure 2 is equipped with a horizontal drive assembly 5. The horizontal drive assembly 5 is the positioning abutment. The movement of the fixing component 4 provides power, driving it to move closer to or away from the workpiece. Simultaneously, a downward clamping structure 6 is also provided on the base plate 1. This downward clamping structure 6 can reciprocate linearly in the vertical direction, and its position corresponds one-to-one with the steel balance block mounting and positioning structure 2, used to clamp and fix the workpiece vertically. The symmetrical layout ensures balanced force distribution during processing, preventing base plate deformation due to excessive localized force and guaranteeing overall structural stability. The combined design of the steel balance block mounting and positioning structure 2, the positioning and abutting fixing component 4, and the downward clamping structure 6 achieves multi-dimensional fixation of the workpiece, providing a stable and reliable foundation for subsequent batch processing. The horizontal drive component 5 automates the movement of the positioning and abutting fixing component 4, reducing manual operation intensity and improving clamping efficiency.

[0030] Combination Figure 1-4 As shown, the steel balance block mounting and positioning structure 2 includes eight positioning mandrels 2a set on the base plate 1. A pad 2b is sleeved on the outside of the positioning mandrel 2a. The positioning mandrel 2a passes through the pad 2b and the top of the positioning mandrel 2a forms an annular step with the top surface of the pad 2b.

[0031] Specifically, when placing a workpiece, the positioning hole at the bottom of the workpiece fits onto the positioning mandrel 2a, and the outer circumferential surface of the positioning mandrel 2a is in contact with the inner wall of the workpiece positioning hole, achieving preliminary horizontal positioning of the workpiece. The top surface of the pad 2b contacts the bottom of the workpiece, providing support for the workpiece. The annular step formed by the top of the positioning mandrel 2a and the top surface of the pad 2b restricts excessive downward movement of the workpiece along the Z-axis, ensuring the consistency of the workpiece placement position. The setting of eight positioning mandrels 2a enables the simultaneous installation and fixing of eight workpieces, significantly improving batch processing capabilities and reducing the time cost of frequent clamping. The cooperation between the positioning mandrel 2a and the workpiece positioning hole achieves precise preliminary positioning of the workpiece, ensuring the uniformity of the positions of multiple workpieces on the fixture. The design of the annular step further restricts the Z-axis degree of freedom of the workpiece, laying a stable foundation for subsequent clamping processes.

[0032] Combination Figure 4As shown, the positioning spindle 2a is fixed to the base plate 1 by an M8×50 hexagon socket head cap screw 2c, and the positioning spindle 2a and the downward clamping structure 6 are staggered.

[0033] In this embodiment, the M8×50 socket head cap screw 2c securely fixes the positioning mandrel 2a to the base plate 1 via a threaded connection, ensuring that the positioning mandrel 2a will not loosen or shift during processing. The staggered arrangement of the positioning mandrel 2a and the downward clamping structure 6 avoids mutual interference between the two in space, allowing the downward clamping structure 6 to smoothly perform vertical clamping action on the workpiece without affecting the positioning function of the positioning mandrel 2a. The use of the M8×50 socket head cap screw 2c to fix the positioning mandrel 2a ensures a firm and reliable connection and facilitates the disassembly and replacement of the positioning mandrel 2a. When the positioning mandrel 2a is worn or damaged, it can be quickly repaired and replaced. The staggered arrangement ensures the normal functioning of both the positioning mandrel 2a and the downward clamping structure 6, improves the space utilization of the fixture structure, and makes the overall layout more reasonable and compact.

[0034] The positioning and abutting fixing component 4 includes four positioning push blocks 4a disposed on the side of the positioning cylinder fixing plate 3 near the positioning spindle 2a. The positioning push blocks 4a have workpiece alignment slots 4b with openings facing the positioning spindle 2a. The positioning push blocks 4a are staggered with the pressing and clamping structure 6.

[0035] In this embodiment, when the positioning push block 4a moves towards the positioning mandrel 2a under the drive of the horizontal drive component 5, the workpiece alignment slot 4b will fit against the side of the workpiece sleeved on the positioning mandrel 2a, forming a horizontal clamping force on the workpiece through the two side walls of the slot; the staggered arrangement of the positioning push block 4a and the downward clamping structure 6 ensures that the positioning push block 4a will not collide with the downward clamping structure 6 during horizontal movement, and the downward clamping structure 6 will not be obstructed by the positioning push block 4a during vertical movement; the four positioning push blocks 4a respectively clamp different workpieces, ensuring that each workpiece is subjected to a uniform horizontal clamping force; the matching design of the workpiece alignment slot 4b and the side of the workpiece can accurately position the workpiece, restrict the rotational freedom of the workpiece along the X and Y axes, and prevent the workpiece from rotating and shifting during processing; the staggered arrangement avoids interference between the positioning push block 4a and the downward clamping structure 6, ensuring the smooth operation of both.

[0036] Combination Figure 2 As shown, the horizontal drive assembly 5 includes four positioning cylinders 5a disposed on the side of the positioning cylinder fixing plate 3 away from the positioning spindle 2a. The piston rod of the positioning cylinder 5a passes through the positioning cylinder fixing plate 3 and the end of the piston rod of the positioning cylinder 5a is equipped with a connecting screw 5b. The connecting screw 5b is connected to the positioning push block 4a through a slider 5c.

[0037] In this embodiment, when the positioning cylinder 5a is ventilated, its piston rod extends or retracts horizontally. The movement of the piston rod is transmitted to the slider 5c via the connecting screw 5b, and the slider 5c then drives the positioning push block 4a to reciprocate linearly in the horizontal direction. Since the positioning cylinder 5a corresponds one-to-one with the positioning push block 4a, each positioning push block 4a can obtain an independent driving force, ensuring that the clamping force on each workpiece can be controlled individually. The positioning cylinder 5a provides a stable horizontal driving force, realizing the automation of the movement of the positioning push block 4a, reducing manual operation, and improving clamping efficiency. The piston rod is connected to the positioning push block 4a via the connecting screw 5b and the slider 5c, and the transmission structure is simple and reliable with low power transmission loss. The four independent positioning cylinders 5a can control the corresponding positioning push block 4a respectively, ensuring that each workpiece can obtain a suitable clamping force, improving the consistency and reliability of positioning.

[0038] The slider 5c has a slot 5c1 at its tail that engages with the connecting screw 5b, and a dovetail groove 5c2 at its head that is interference-fitted with the dovetail of the positioning push block 4a.

[0039] In this embodiment, the head of the connecting screw 5b is engaged in the slot 5c1 at the tail of the slider 5c. When the piston rod of the positioning cylinder 5a moves, the connecting screw 5b drives the slider 5c to move synchronously through the slot 5c1. The dovetail groove 5c2 at the head of the slider 5c is interference-fitted with the dovetail structure at the tail of the positioning push block 4a, so that the slider 5c and the positioning push block 4a are firmly connected, and the movement of the slider 5c can be accurately transmitted to the positioning push block 4a. The engagement between the slot 5c1 and the connecting screw 5b realizes the quick assembly and reliable connection of the slider 5c and the connecting screw 5b, and facilitates disassembly and maintenance. The interference fit between the dovetail groove 5c2 and the dovetail structure ensures that there is no relative sliding between the slider 5c and the positioning push block 4a, the power transmission is accurate, the positioning error is reduced, the movement accuracy of the positioning push block 4a is improved, and thus the accuracy of the horizontal positioning of the workpiece is guaranteed.

[0040] The base plate 1 is equipped with a guide rail 7, the slider 5c slides with the guide rail 7, and a guide rail pad 8 is installed between the guide rail 7 and the base plate 1. The guide rail pad 8 is fixed to the base plate 1 by a cylindrical pin 9.

[0041] In this embodiment, the slider 5c slides along the guide rail 7 under the drive of the positioning cylinder 5a. The guide rail 7 provides guidance for the movement of the slider 5c, ensuring that the slider 5c can only move in the set direction. The guide rail pad 8 is used to adjust the installation height of the guide rail 7 so that the cooperation between the guide rail 7 and the slider 5c reaches the optimal state. The cylindrical pin 9 precisely positions and fixes the guide rail pad 8 and the base plate 1 to prevent the guide rail pad 8 and the guide rail 7 from shifting during the movement of the slider 5c. The sliding cooperation between the guide rail 7 and the slider 5c provides precise guidance for the movement of the slider 5c, reduces the shaking and shifting during the movement of the slider 5c, ensures the straightness of the horizontal movement of the positioning push block 4a, and improves the positioning accuracy. The guide rail pad 8 facilitates the adjustment of the height of the guide rail 7 and enhances the assembly flexibility of the fixture. The fixing effect of the cylindrical pin 9 ensures the accuracy and stability of the installation position of the guide rail 7 and the guide rail pad 8, further improving the reliability of the overall structure.

[0042] Combination Figure 1 As shown, the downward clamping structure 6 includes ten cylinder rods 6a disposed on the base plate 1. A cylinder pressure bar 6b ​​is installed on the top of the cylinder rod 6a. The cylinder pressure bar 6b ​​and the cylinder rod 6a are fixed together by a pressure bar cylindrical pin 6c.

[0043] In this embodiment, when the cylinder rod 6a moves vertically, it drives the top cylinder pressure bar 6b ​​to move up and down synchronously. When the cylinder pressure bar 6b ​​descends, its bottom surface contacts the top surface of the workpiece, applying vertical pressure to the workpiece. The cylindrical pin 6c of the pressure bar ensures the relative fixation between the cylinder pressure bar 6b ​​and the cylinder rod 6a, preventing the cylinder pressure bar 6b ​​from loosening or rotating during clamping. The ten cylinder rods 6a are evenly distributed, making the pressure of the cylinder pressure bar 6b ​​on the workpiece evenly distributed, preventing the workpiece from deforming due to excessive local force. The length of the cylinder pressure bar 6b ​​covers multiple workpieces, realizing the simultaneous vertical clamping of multiple workpieces and improving clamping efficiency. The fixing method of the cylindrical pin 6c of the pressure bar is simple and reliable, ensuring the stability of the connection between the cylinder pressure bar 6b ​​and the cylinder rod 6a, and ensuring the effective transmission of clamping force.

[0044] Combination Figure 1 , Figure 2 As shown, the cross-section of the cylinder tie rod 6a is rectangular. Ten clamping cylinders 6d are provided below the base plate 1. The piston rod of the clamping cylinder 6d is connected to the cylinder tie rod 6a. Four M6×70 socket head cap screws 6e for supporting the cylinder pressure bar 6b ​​are symmetrically installed on the left and right ends of the top surface of the base plate 1.

[0045] In this embodiment, the cross-sectional shape of the cylinder rod 6a is rectangular. This shape can effectively limit the rotation of the cylinder rod 6a itself and ensure the stability of its movement direction. Ten clamping cylinders 6d are arranged below the base plate 1. The number of clamping cylinders 6d corresponds one-to-one with the number of cylinder rods 6a. The piston rod of the clamping cylinder 6d is arranged vertically, and the top end of the piston rod is connected to the bottom end of the cylinder rod 6a. That is, the extension and retraction of the piston rod drives the cylinder rod 6a to move up and down synchronously. Four M6×70 socket head cap screws 6e are symmetrically installed at both ends of the top surface of the base plate 1. The top of these screws is slightly higher than the top surface of the workpiece. When the cylinder clamping strip 6b is in the non-clamped state, the bottom surface of the cylinder clamping strip 6b rests on the top of the M6×70 socket head cap screws 6e, thus supporting the cylinder clamping strip 6b. When the piston rod of the clamping cylinder 6d extends or retracts, it directly drives the cylinder connecting rod 6a to move vertically. Since the cylinder connecting rod 6a has a rectangular cross-section, it will not rotate during the movement, ensuring that the cylinder clamping strip 6b always remains horizontal. When the workpiece does not need to be clamped, the cylinder clamping strip 6b rises and rests on the top of the M6×70 socket head cap screws 6e. The hex socket head cap screw 6e bears the weight of the cylinder pressure bar 6b ​​and the cylinder connecting rod 6a, preventing the piston rod of the clamping cylinder 6d from being under constant stress. The rectangular cross-section of the cylinder connecting rod 6a prevents it from rotating, ensuring the horizontality of the cylinder pressure bar 6b ​​and ensuring a uniform distribution of clamping force on the workpiece. The clamping cylinder 6d provides a stable vertical driving force for the cylinder connecting rod 6a, realizing the automation of the downward clamping action. The support of the M6×70 hex socket head cap screw 6e for the cylinder pressure bar 6b ​​reduces the load on the piston rod of the clamping cylinder 6d, extends the service life of the clamping cylinder 6d, and also provides a stable parking position for the cylinder pressure bar 6b.

[0046] Combination Figure 1 As shown, the bottom of the base plate 1 is provided with a plurality of equal height blocks 10, and the equal height blocks 10 are fixed to the base plate 1 by screws.

[0047] In this embodiment, the bottom of the contour block 10 is placed on the workbench of the machining center to provide support for the base plate 1 and maintain a certain distance between the base plate 1 and the workbench; since all the contour blocks 10 have the same height, it can be ensured that the base plate 1 is in a horizontal state.

[0048] The working principle of this utility model is as follows:

[0049] Workpiece positioning stage: The operator places the 8 steel balance block workpieces onto the positioning mandrel 2a respectively, with the bottom of the workpiece in contact with the pad 2b. The annular step initially restricts the movement of the workpiece in the Z-axis direction, completing the initial positioning.

[0050] Horizontal clamping stage: The positioning cylinder 5a is activated, and the piston rod pushes the slider 5c to slide along the guide rail 7 through the connecting screw 5b, which drives the positioning push block 4a to move closer to the workpiece; the workpiece alignment slot 4b of the push block engages with the side of the workpiece, and the horizontal thrust restricts the rotational freedom of the workpiece along the X and Y axes, thereby achieving horizontal fixation.

[0051] Vertical clamping stage: The clamping cylinder 6d drives the cylinder rod 6a to rise, which in turn drives the cylinder pressure bar 6b ​​to fall and press against the top of the workpiece; the vertical pressure further restricts the movement of the workpiece in the Z-axis direction, forming a coordinated fixation with the horizontal clamping to ensure the complete stability of the workpiece;

[0052] Machining stage: The fixture moves the eight fixed workpieces along with the machining center table to complete machining processes such as drilling and boring; because the multiple degrees of freedom of the workpieces are precisely restricted, there is no offset during the machining process, ensuring the accuracy of hole positions and the consistency of dimensions;

[0053] Unclamping and part removal stage: After processing is completed, the vertical clamping structure is reset first (the cylinder pressure bar 6b ​​rises to the support screw), the piston rod of the positioning cylinder 5a retracts and drives the positioning push block 4a away from the workpiece, and the operator can quickly remove the 8 processed workpieces and enter the next clamping cycle.

[0054] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0055] Although this document frequently uses terms such as base plate 1, steel balance block mounting and positioning structure 2, positioning cylinder fixing plate 3, positioning abutment fixing component 4, horizontal drive assembly 5, downward clamping structure 6, positioning mandrel 2a, pad 2b, M8×50 socket head cap screw 2c, positioning push block 4a, workpiece alignment slot 4b, positioning cylinder 5a, connecting screw 5b, slider 5c, slot 5c1, dovetail groove 5c2, guide rail 7, guide rail pad 8, cylinder pull rod 6a, cylinder pressure bar 6b, pressure bar cylindrical pin 6c, clamping cylinder 6d, M6×70 socket head cap screw 6e, and leveling block 10, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A machining center fixture for steel balance blocks, comprising a base plate (1), characterized in that, The base plate (1) is provided with several steel balance block mounting and positioning structures (2) symmetrically arranged along the center line of the base plate (1). A positioning cylinder fixing plate (3) is installed on the front and rear sides of the base plate (1). The positioning cylinder fixing plate (3) is provided with a positioning abutment fixing member (4) that can reciprocate linearly in the horizontal direction on the side close to the steel balance block mounting and positioning structure (2). The positioning cylinder fixing plate (3) is provided with a horizontal drive component (5) for driving the positioning abutment fixing member (4) on the side away from the steel balance block mounting and positioning structure (2). The base plate (1) is also provided with a downward clamping structure (6) that can reciprocate linearly in the vertical direction. The downward clamping structure (6) corresponds to the position of the steel balance block mounting and positioning structure (2).

2. The machining center fixture for a steel balance block according to claim 1, characterized in that, The steel balance block mounting and positioning structure (2) includes eight positioning mandrels (2a) set on the base plate (1). A pad (2b) is sleeved on the outside of the positioning mandrel (2a). The positioning mandrel (2a) passes through the pad (2b) and the top of the positioning mandrel (2a) forms an annular step with the top surface of the pad (2b).

3. The machining center fixture for a steel balance block according to claim 2, characterized in that, The positioning mandrel (2a) is fixed to the base plate (1) by an M8×50 hexagon socket head cap screw (2c), and the positioning mandrel (2a) and the downward clamping structure (6) are staggered.

4. The machining center fixture for a steel balance block according to claim 3, characterized in that, The positioning and abutting fixing component (4) includes four positioning push blocks (4a) disposed on the side of the positioning cylinder fixing plate (3) near the positioning spindle (2a). The positioning push blocks (4a) have workpiece alignment slots (4b) with openings facing the positioning spindle (2a). The positioning push blocks (4a) are staggered with the pressing clamping structure (6).

5. The machining center fixture for a steel balance block according to claim 4, characterized in that, The horizontal drive assembly (5) includes four positioning cylinders (5a) located on the side of the positioning cylinder fixing plate (3) away from the positioning spindle (2a). The piston rod of the positioning cylinder (5a) passes through the positioning cylinder fixing plate (3) and the end of the piston rod of the positioning cylinder (5a) is equipped with a connecting screw (5b). The connecting screw (5b) is connected to the positioning push block (4a) through a slider (5c).

6. The machining center fixture for a steel balance block according to claim 5, characterized in that, The slider (5c) has a slot (5c1) at its tail that engages with the connecting screw (5b), and a dovetail groove (5c2) at its head that is interference-fitted with the dovetail of the positioning push block (4a).

7. A machining center fixture for a steel balance block according to claim 5 or 6, characterized in that, The base plate (1) is equipped with a guide rail (7), the slider (5c) slides with the guide rail (7), a guide rail pad (8) is installed between the guide rail (7) and the base plate (1), and the guide rail pad (8) is fixed to the base plate (1) by a cylindrical pin (9).

8. A machining center fixture for a steel balance block according to claim 2, characterized in that, The downward clamping structure (6) includes ten cylinder rods (6a) set on the base plate (1). The top of the cylinder rod (6a) is equipped with a cylinder pressure bar (6b). The cylinder pressure bar (6b) and the cylinder rod (6a) are fixed together by a pressure bar cylindrical pin (6c).

9. A machining center fixture for a steel balance block according to claim 8, characterized in that, The cross-section of the cylinder tie rod (6a) is rectangular. Ten clamping cylinders (6d) are provided below the base plate (1). The piston rod of the clamping cylinder (6d) is connected to the cylinder tie rod (6a). Four M6×70 socket head cap screws (6e) for supporting the cylinder pressure bar (6b) are symmetrically installed on the left and right ends of the top surface of the base plate (1).

10. A machining center fixture for a steel balance block according to claim 1, characterized in that, The bottom of the base plate (1) is provided with several equal height blocks (10), and the equal height blocks (10) are fixed to the base plate (1) by screws.

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