A machining center machine tool special for sheet metal impact test samples

Abstract

The utility model relates to metal detection sample processing equipment technical field, concretely is a kind of metal plate impact sample special machining center machine tool, it includes: workbench, processing assembly and clamping tooling.The utility model, through the cooperation of lifting oil cylinder and action oil cylinder, the collaborative action of clamping tooling and broach can be realized: when lifting, clamping tooling automatically retreats, and it is automatically reset and tightens sample when falling, can avoid hitting knife;When action oil cylinder drives clamping tooling to move, it will first drive clamping block to move, to realize the clamping and release of sample, cooperate the action of lifting oil cylinder, the automatic clamping and automatic material of sample can be completed in the process of lifting and falling, reduce the processing step, save processing time.

Description

Technical Field

[0001] This utility model relates to the technical field of metal testing sample processing equipment, specifically a special machining center machine tool for metal sheet impact test samples. Background Technology

[0002] In the field of impact performance testing of metallic materials, the machining accuracy of standard specimens has a decisive impact on the test results. Currently, the traditional milling machines or specialized machining equipment commonly used in the industry have significant technical defects in their specimen clamping methods. Operators need to manually tighten bolts to secure the specimen, which poses a serious safety hazard during batch processing. Because the clamps need to be repeatedly tightened and loosened during processing, operators are prone to accidentally raising the cutting tool before the material is fully removed, causing the broach to collide with the specimen, resulting in tool breakage and equipment damage.

[0003] Besides safety hazards, the traditional processing method is inefficient due to the need for frequent material changes, which require repeated bolt rotation. More importantly, manual clamping makes it difficult to ensure uniform clamping force, easily causing sample skew and resulting in notches with symmetry exceeding standard requirements. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a special machining center for metal sheet impact test specimens.

[0005] The technical solution of this utility model is:

[0006] A special machining center for metal sheet impact test specimens includes: Worktable, machining components, and clamping fixtures; The processing assembly includes a broach assembly and a lifting cylinder. The broach assembly is vertically arranged at the center of the worktable, and the lifting cylinder is used to drive the broach assembly to move in the vertical direction. The clamping fixture is located on the top surface of the worktable and symmetrically positioned on both sides of the broach assembly. The clamping fixture includes a sliding base, which is slidably mounted on the top surface of the worktable via a second guide rail. A clamping block is slidably mounted inside the sliding base. An actuating cylinder is provided on the rear side of the sliding base, and the piston rod of the actuating cylinder passes through the sliding base and is connected to the clamping block. The hydraulic lines of the actuating cylinder are linked with the control lines of the lifting cylinder, so that when the lifting cylinder rises, the actuating cylinder pulls the clamping fixture away from the cutter assembly, and when the lifting cylinder descends, the actuating cylinder pushes the clamping fixture closer to the cutter assembly.

[0007] Preferably, the workbench includes a base support, the top of the base support is provided with a workbench surface, the center of the workbench surface is provided with a square through hole, the left and right sides of the square through hole are provided with material drop grooves, and the broach assembly is slidably disposed in the square through hole.

[0008] Preferably, the puller assembly includes a cutter holder, the bottom of which is fixedly connected to the piston rod of the lifting cylinder, and pullers are provided on the left and right sides of the cutter holder, with the cutter blades located in the material drop groove.

[0009] Preferably, the top of the lifting cylinder body and the outer side of the piston rod is provided with a receiving groove, the width of which is greater than the length of the square through hole plus the discharge groove.

[0010] Preferably, the sliding base has an L-shaped baffle on the front side of its top surface, the clamping block is slidably mounted on the top surface of the sliding base and located inside the baffle, and the clamping block has symmetrically arranged positioning rods on its back side, the positioning rods passing through the sliding base and slidably connected to the sliding base.

[0011] Preferably, the front side of the baffle plate and the sliding base is provided with a processing groove, which matches the broach cutting edge and has a depth greater than the width of the broach cutting edge.

[0012] Preferably, the sliding base has limiting blocks on both sides parallel to the second guide rail, and the limiting blocks are fixedly installed on the top surface of the workbench to limit the movement distance of the sliding base.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention, through the cooperation of a lifting cylinder and an actuating cylinder, enables coordinated action of the clamping fixture and the cutting tool: when the cutting tool is raised, the clamping fixture automatically retracts; when the cutting tool is lowered, it automatically resets and clamps the sample, thus avoiding cutting collision; when the actuating cylinder drives the clamping fixture to move, it first drives the clamping block to move, thereby achieving the clamping and release of the sample. In conjunction with the action of the lifting cylinder, the automatic clamping and automatic unloading of the sample can be completed during the raising and lowering of the cutting tool, reducing processing steps and saving processing time. Attached Figure Description

[0014] Figure 1 This is a first schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 3 This is a second schematic diagram of the overall structure of this utility model; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point B; Figure 5 This is an exploded view of the clamping fixture structure in this utility model.

[0015] The meanings of the labels in the diagram are as follows: 1. Workbench; 11. Base support; 12. Workbench surface; 13. Material drop chute; 2. Machining components; 21. Lifting cylinder; 22. Material receiving trough; 23. Tool holder; 24. Broach; 25. First guide rail; 26. First guide block; 3. Clamping fixture; 31. Second guide rail; 32. Sliding base; 33. Material stop plate; 34. Machining groove; 35. Clamping block; 36. Pressing block; 37. Positioning rod; 38. Actuating cylinder; 39. Limit block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1: Please see Figure 1-5 The present invention will describe the above technical solution in detail through the following embodiments: A special machining center for metal sheet impact test specimens includes: Workbench 1, machining components 2, and clamping fixture 3.

[0018] The workbench 1 includes a base support 11, a workbench surface 12 is provided at the top of the base support 11, a square through hole is provided in the center of the workbench surface 12, and material drop grooves 13 are provided on the left and right sides of the square through hole.

[0019] The machining component 2 includes a broach assembly and a lifting cylinder 21. The broach assembly is vertically positioned at the center of the worktable 1, and the lifting cylinder 21 is used to drive the broach assembly to move in the vertical direction.

[0020] The broach assembly is slidably positioned within the square through hole.

[0021] The lifting cylinder 21 is vertically installed at the bottom of the inner side of the base bracket 11.

[0022] The cutter assembly includes a cutter holder 23. The bottom of the cutter holder 23 is fixedly connected to the piston rod of the lifting cylinder 21. Cutters 24 are fixedly mounted on the left and right sides of the cutter holder 23 by countersunk screws. The cutting edge of the cutter 24 is located in the material drop chute 13.

[0023] The broaches 24 on the left and right sides have different cutting edge shapes, one side is V-shaped and the other side is U-shaped.

[0024] The tool holder 23 is fixed with first guide rails 25 on both the front and rear sides by countersunk screws. The bottom surface of the worktable 12 is provided with first guide blocks 26 at corresponding positions. The first guide blocks 26 cooperate with the first guide rails 25 to restrict the movement direction of the tool holder 23 and prevent the tool holder 23 from deviating during the machining process.

[0025] The top of the lifting cylinder 21 and the outside of the piston rod is provided with a receiving groove 22. The width of the receiving groove 22 is greater than the length of the square through hole plus the dropping groove 13.

[0026] The receiving groove 22 is used to receive the chips falling from the discharge groove 13 during the processing, as well as the cutting fluid dripping from the gap between the tool holder 23 and the worktable 12.

[0027] The clamping fixture 3 is located on the top surface of the workbench 1 and symmetrically positioned on both sides of the broach assembly. The clamping fixture 3 includes a sliding base 32, which is slidably mounted on the top surface of the workbench 1 via a second guide rail 31. A clamping block 35 is slidably mounted inside the sliding base 32. An actuating cylinder 38 is provided on the rear side of the sliding base 32, and the piston rod of the actuating cylinder 38 passes through the sliding base 32 and is connected to the clamping block 35.

[0028] The second guide rail 31 is used to limit the movement direction of the sliding base 32 and prevent the sliding base 32 from flipping over.

[0029] When the hydraulic cylinder 38 is in operation, it can drive the clamping block 35 to move horizontally. When the clamping block 35 moves away from the drawbar assembly, it can drive the sliding base 32 to move together.

[0030] The sliding base 32 has an L-shaped baffle plate 33 on the front side of its top surface. The clamping block 35 is slidably installed on the top surface of the sliding base 32 and located inside the baffle plate 33. The clamping block 35 has symmetrically arranged positioning rods 37 on its back side. The positioning rods 37 horizontally pass through the sliding base 32 and are slidably connected to the sliding base 32.

[0031] The positioning rod 37 is used to limit the movement direction of the clamping block 35 and prevent the clamping block 35 from flipping.

[0032] A pressure plate 36 is fixedly mounted on the top surface of the clamping block 35 by screws, with the front side of the pressure plate 36 extending beyond the front edge of the clamping block 35. This is used to prevent the sample from flipping.

[0033] During processing, the sample is placed between the clamping block 35 and the baffle plate 33. When the piston rod of the actuating cylinder 38 extends, it can drive the clamping block 35 to move towards the baffle plate 33, which will push the sample towards the baffle plate 33, thereby clamping the sample. Continuing to push the clamping block 35 towards the baffle plate 33 will push the sliding base 32 towards the broach assembly.

[0034] When the piston rod of the hydraulic cylinder 38 retracts, it drives the clamping block 35 away from the baffle plate 33, which first releases the clamping of the sample. When the back of the clamping block 35 abuts against the sliding base 32, the piston rod of the hydraulic cylinder 38 continues to retract, which can drive the sliding base 32 away from the puller assembly.

[0035] The front side of the baffle plate 33 and the sliding base 32 is provided with a machining groove 34, which matches the cutting edge of the broach 24 and has a depth greater than the width of the cutting edge of the broach 24.

[0036] During machining, the broach 24 moves downward along the centerline of the machining groove 34 to cut the sample, creating a V-shaped or U-shaped opening. The chips fall from the machining groove 34 into the feed chute 13, and finally into the receiving groove 22.

[0037] Limiting blocks 39 are provided on both sides of the sliding base 32 parallel to the second guide rail 31. The limiting blocks 39 are fixedly installed on the top surface of the workbench 1 by screws.

[0038] The limiting block 39 is used to limit the movement distance of the sliding base 32.

[0039] The hydraulic lines of the actuating cylinder 38 are linked with the control lines of the lifting cylinder 21, so that when the lifting cylinder 21 rises, the actuating cylinder 38 pulls the clamping fixture 3 away from the cutter assembly, and when the lifting cylinder 21 falls, the actuating cylinder 38 pushes the clamping fixture 3 closer to the cutter assembly.

[0040] Working principle: The lifting process: The piston rod of the lifting cylinder 21 extends, driving the tool holder 23 and the puller 24 to rise. At the same time, the actuation cylinder 38 works, the piston rod retracts, and controls the clamping block 35 to move away from the tool holder 23, thereby driving the sliding base 32 away from the tool holder 23 until the sliding base 32 is blocked by the limit block 39.

[0041] At this time, the tool holder 23 and the broach 24 continue to rise, and the operator can place the sample between the clamping block 35 and the baffle plate 33.

[0042] The process of cutting: After the tool holder 23 is raised to its highest position, observe that the sample has been placed in place.

[0043] The piston rod of the lifting cylinder 21 is retracted, driving the tool holder 23 and the puller 24 to descend. At the same time, the actuation cylinder 38 is activated, the piston rod extends, and the clamping block 35 is driven to move towards the tool holder 23, thereby pushing the sample to move towards the baffle plate 33, and then pushing the sliding base 32 to move towards the tool holder 23.

[0044] Until the sliding base 32 is blocked by the limiting block 39, the actuating cylinder 38 maintains pressure. The thrust of the actuating cylinder 38 can ensure that the clamping block 35 cooperates with the baffle plate 33 to clamp the sample, while the pressing block 36 is located on the top surface of the sample, restricting the sample from flipping.

[0045] The piston rod of the lifting cylinder 21 continues to retract, at which point the broach 24 contacts the sample and begins cutting it. Chips fall from the machining slot 34, through the feed chute 13, and into the receiving slot 22. During the machining process, cutting fluid can be used for flushing, cooling, and lubrication.

[0046] The cutting process continues until the tool holder 23 reaches its lowest position.

[0047] Return of materials: The piston rod of the lifting cylinder 21 is extended, and the action cylinder 38 is operated simultaneously. The piston rod is retracted, the clamping block 35 moves away from the tool holder 23, and the clamping of the sample is released.

[0048] After the sliding base 32 is stopped by the limiting block 39, the sample is removed and a new sample is placed in.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A special machining center for impact test specimens of metal plates, characterized in that, include: Workbench (1), machining components (2), and clamping fixture (3); The processing assembly (2) includes a broach assembly and a lifting cylinder (21). The broach assembly is vertically arranged at the center of the worktable (1), and the lifting cylinder (21) is used to drive the broach assembly to move in the vertical direction. The clamping fixture (3) is located on the top surface of the workbench (1) and symmetrically located on both sides of the broach assembly. The clamping fixture (3) includes a sliding base (32). The sliding base (32) is slidably installed on the top surface of the workbench (1) via a second guide rail (31). A clamping block (35) is slidably installed inside the sliding base (32). An actuating cylinder (38) is provided on the rear side of the sliding base (32). The piston rod of the actuating cylinder (38) passes through the sliding base (32) and is connected to the clamping block (35). The hydraulic lines of the actuating cylinder (38) are linked with the control lines of the lifting cylinder (21), so that when the lifting cylinder (21) rises, the actuating cylinder (38) pulls the clamping fixture (3) away from the cutter assembly, and when the lifting cylinder (21) falls, the actuating cylinder (38) pushes the clamping fixture (3) closer to the cutter assembly.

2. The special machining center for metal sheet impact test specimens as described in claim 1, characterized in that: The workbench (1) includes a base support (11), the top of the base support (11) is provided with a work surface (12), the center of the work surface (12) is provided with a square through hole, the left and right sides of the square through hole are provided with material drop grooves (13), and the pull knife assembly is slidably disposed in the square through hole.

3. The special machining center for metal sheet impact test specimens as described in claim 2, characterized in that: The cutter assembly includes a cutter holder (23), the bottom of which is fixedly connected to the piston rod of the lifting cylinder (21). The cutter holder (23) is provided with cutters (24) on the left and right sides, and the cutting edge of the cutter (24) is located in the material drop groove (13).

4. The special machining center for metal sheet impact test specimens as described in claim 2, characterized in that: The lifting cylinder (21) has a receiving groove (22) on the top of the cylinder body and outside the piston rod. The width of the receiving groove (22) is greater than the length of the square through hole plus the dropping groove (13).

5. The special machining center for metal sheet impact test specimens as described in claim 1, characterized in that: The sliding base (32) has an L-shaped baffle plate (33) on the front side of its top surface. The clamping block (35) is slidably installed on the top surface of the sliding base (32) and located inside the baffle plate (33). The clamping block (35) has symmetrically arranged positioning rods (37) on its back side. The positioning rods (37) horizontally penetrate the sliding base (32) and are slidably connected to the sliding base (32).

6. The special machining center for metal sheet impact test specimens as described in claim 5, characterized in that: The front side of the baffle plate (33) and the sliding base (32) is provided with a processing groove (34), which matches the cutting edge of the broach (24) and has a depth greater than the width of the cutting edge of the broach (24).

7. The special machining center for metal sheet impact test specimens as described in claim 1, characterized in that: The sliding base (32) has limit blocks (39) on both sides parallel to the second guide rail (31). The limit blocks (39) are fixedly installed on the top surface of the workbench (1) to limit the movement distance of the sliding base (32).

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