A cast part hardness testing machine

Abstract

The utility model discloses a kind of casting hardness testing machines, belong to hardness test equipment technical field. Including the platform for supporting casting, testing indenter is set up relative to platform lifting;Left clamp block, right clamp block are respectively slidably installed on platform, for clamping the two sides of casting placed on platform;Among them, left clamp block, right clamp block respectively have two clamping ends, clamping end buckle connection has top block, and each top block has a clamping surface compatible with the clamped position of casting. Left and right clamp block in the utility model can independently use different top block, and the clamping capacity of asymmetric, complex shape workpiece is enhanced;Through the simple structure of bayonet, chuck, the quick replacement of top block and clamp block is realized, and the clamping surface of top block can be processed according to the specific profile of casting, so that special equipment becomes general test platform, improves test efficiency, reduces test cost.

Description

Technical Field

[0001] The utility model relates to the technical field of hardness testing equipment, in particular to a casting hardness tester. Background Art

[0002] In the foundry industry, the hardness of castings is one of the key indicators for evaluating their material properties, heat treatment quality and service life. In order to ensure product quality, accurate and reliable hardness testing is required for trial-produced products. At present, the mainstream hardness testers on the market can provide relatively accurate results when testing workpieces with regular shapes. However, when facing castings with complex shapes, diverse sizes and irregular surfaces, the existing hardness testers generally have adaptability problems in terms of clamping and positioning. For example, most hardness testers are equipped with standard, fixed-shape jaws or workbenches, and special fixtures need to be customized for special-shaped castings, which not only increases the equipment cost, but also is inconvenient for management and replacement. Contents of the Utility Model

[0003] The purpose of the utility model is to provide a casting hardness tester, which is used to adapt to the testing of castings of different shapes.

[0004] The utility model adopts the following technical solutions: A casting hardness tester, comprising: a carrier table, configured to support the casting; a test indenter, arranged to be liftable relative to the carrier table, configured to press down the casting placed on the carrier table; a left clamping block and a right clamping block arranged separately, which are respectively slidably mounted on the carrier table, and configured to clamp two sides of the casting placed on the carrier table; wherein, the left clamping block and the right clamping block are respectively provided with two clamping ends, the clamping ends are snap-fitted with top blocks, and each top block has a clamping surface adapted to the clamped position of the casting.

[0005] Preferably: a T-shaped chute is opened on the carrier table, the left clamping block and the right clamping block are attached to the upper side surface of the carrier table, sliding blocks are fixed on the lower side surfaces of the left clamping block and the right clamping block, and the sliding blocks are slidably mounted in the T-shaped chute.

[0006] Preferably: the sliding block is in a "几" shape, and two side edges of the sliding block are buckled in the T-shaped chute.

[0007] Preferably: a fixing assembly for fixing the left clamping block on the carrier table is fixed on the left side of the left clamping block; The fixing assembly comprises: a connecting block, fixed on the left side of the left clamping block; the connecting block is provided with a vertical through hole; The fastening bolt is inserted into the through hole on the connecting block; the head of the fastening bolt is pressed against the T-shaped groove.

[0008] Preferably, the bottom of the T-shaped slide groove is provided with a limiting slide groove, and the cap of the fastening bolt is located in the limiting slide groove. The limiting slide groove is used to restrict the rotation of the cap of the fastening bolt.

[0009] Preferably, a wear-resistant block is fitted onto the fastening bolt, and the wear-resistant block is pressed tightly between the head of the fastening bolt and the T-shaped groove.

[0010] Preferably, a pushing component for pushing the right clamping block is fixed to the right side of the right clamping block; The actuating component includes: Support, fixed on the platform; An electric push rod, fixed to the support, is used to push the right clamping block.

[0011] Preferably, a pair of elastic rods are also fixed on the support, which are respectively placed on both sides of the electric push rod, and the other end of the elastic rod is fixedly connected to the right side of the right clamping block; The movable end of the electric push rod is fixed with a push plate opposite to the right clamping block.

[0012] Preferably, the left and right clamping blocks are symmetrical in structure; The left clamping block includes a central body perpendicular to the T-shaped groove, and two clamping ends located at both ends of the body and tilted to the right.

[0013] Preferably, the inclined surface of the clamping end of the left clamping block is provided with a vertically penetrating, larger than semi-circular notch; The top block is attached to the inclined surface of the clamping end, and a clamping head adapted to the bayonet is fixed on the top block.

[0014] The beneficial effects of this utility model are as follows: the left and right clamping blocks can use different top blocks independently, which enhances the clamping ability for asymmetrical and complex shaped workpieces; through the simple structure of the bayonet and the clamping head, the top block and the clamping block can be quickly replaced; the clamping surface of the top block can be processed according to the specific contour of the casting; it works very well when clamping some castings with irregular bottoms, thus upgrading the special equipment into a highly flexible general-purpose testing platform. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a perspective view of a casting hardness testing machine provided for an embodiment of the present utility model.

[0017] Figure 2 This is a front view of a casting hardness testing machine provided for an embodiment of the present utility model.

[0018] Figure 3 The left view of a casting hardness testing machine provided in an embodiment of this utility model.

[0019] Figure 4 This is a top view of a casting hardness testing machine provided in an embodiment of the present invention.

[0020] Figure 5 for Figure 4 View from AA.

[0021] Figure 6 This is a perspective view of the left clamping block and fixing component in this utility model.

[0022] Explanation of reference numerals in the attached figures: 1. Platform; 11. T-slot; 12. Limiting slot; 2. Test the pressure head; 3. Left clamping block; 31. Bayonet; 4. Right clamping block; 5. Slider; 6. Top block; 61. Clamping surface; 62. Card head; 7. Fixing components; 71. Connecting block; 72. Fastening bolts; 73. Wear-resistant blocks; 8. Push assembly; 81. Electric actuator; 811. Push plate; 82. Flexible rod; 83. Support; 9. Castings. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Example 1: like Figures 1 to 4As shown, the present utility model provides a casting 9 hardness tester, which mainly includes a carrier 1 for supporting the casting 9, and a test indenter 2 arranged to be movable up and down relative to the carrier 1. A left clamping block 3 and a right clamping block 4 for clamping the casting are slidably mounted on the carrier 1. A fixing assembly 7 is fixed on the left side of the left clamping block 3, and the fixing assembly 7 is used to fix the left clamping block 3 on the carrier 1. A pushing assembly 8 is fixed on the right side of the right clamping block 4, and the pushing assembly 8 is used to push the right clamping block 4 to move toward the left clamping block 3, so as to press the casting 9 placed between the left clamping block 3 and the right clamping block 4. The test indenter 2 gradually presses the casting 9 by descending, completing the hardness test on the casting 9.

[0025] With further reference to Figure 5 as shown, two pairs of parallel T-shaped chutes 11 are respectively opened at both ends of the carrier 1. The left clamping block 3 and the right clamping block 4 are slidably connected with the T-shaped chutes 11 on the corresponding sides respectively. The left clamping block 3 and the right clamping block 4 have symmetrical structures. Taking the left clamping block 3 as an example for description: The left clamping block 3 is attached to the upper side surface of the carrier 1, and the lower side surface of the left clamping block 3 is connected with a sliding block 5; the sliding block 5 is in a "几" shape, and the sliding block 5 is fixed to the left clamping block 3 by screws; the sliding block 5 is slidably installed in the T-shaped chute 11, and the two sides of the "几" shaped sliding block 5 are buckled in the T-shaped chute 11 to prevent the sliding block 5 from disengaging from the T-shaped chute 11; The left clamping block 3 itself is a symmetrical structure, including a main body in the middle perpendicular to the T-shaped chute 11. Both ends of the main body are provided with clamping ends inclined at 45° toward the right, and the right side surface of the clamping end is an inclined surface inclined at 45°; a vertically through bayonet 31 penetrating the clamping end is opened on the inclined surface, and the bayonet 31 is an arc surface structure larger than a half circle.

[0026] With reference to Figure 1 and Figure 6 as shown, each clamping end is provided with a replaceable top block 6 in a matching manner. The left clamping block 3 and the right clamping block 4 can be used independently, or can cooperate with different top blocks 6 to realize the positioning of castings 9 with special shapes. The top block 6 is integrally formed in a matching direction and attached to the inclined surface of the clamping end; one side of the top block 6 close to the inclined surface is provided with a clamping head 62 adapted to the bayonet 31, and the clamping head 62 can be vertically inserted into the bayonet 31. A clamping surface 61 is opened on the side of the top block 6 away from the inclined surface. According to the specific casting 9, the clamping surface 61 is adapted to the clamped position of the casting 9, such as Figure 4 as shown.

[0027] Second Embodiment: On the basis of the first embodiment described above, in combination with Figures 1 to 4 , and Figure 6As shown, this embodiment provides a fixing component 7. The fixing component 7 includes a connecting block 71 welded to the left side of the left clamping block 3. The connecting block 71 has a pair of vertical through holes, which are opposite to two T-shaped sliding grooves 11. A fastening bolt 72 is inserted into the through hole on the connecting block 71 from the bottom, and a nut is installed at the upper end. The head of the fastening bolt 72 is located in the T-shaped sliding groove 11. A limiting groove 12 is formed at the bottom of the T-shaped sliding groove 11, and the head of the fastening bolt 72 is located in the limiting groove 12. The width of the limiting groove 12 is smaller than the maximum diameter of the head, thereby limiting the rotation of the fastening bolt 72. A wear-resistant block 73 is fitted onto the lower end of the fastening bolt 72. After the nut is tightened, the wear-resistant block 73 is pressed tightly between the head of the fastening bolt 72 and the T-shaped sliding groove 11, thereby fixing the connecting block 71 and the T-shaped sliding groove 11, and thus positioning the left clamping block 3.

[0028] Example 3: Based on the above embodiments one or two, combined with Figures 1 to 4 As shown, this embodiment provides a pushing assembly 8. The pushing assembly 8 includes a support 83 fixed to the platform 1 by bolts, the support 83 pressing the electric push rod 81 onto the platform 1. The electric push rod 81 is parallel to the T-shaped slide 11 and positioned between the two T-shaped slides 11. A push plate 811 is fixed to the movable section of the electric push rod 81. The push plate 811 is used to push the right clamping block 4, but the push plate 811 and the right clamping block 4 are not connected.

[0029] An elastic rod 82 is provided on each side of the electric push rod 81, and the two elastic rods 82 are symmetrical along the electric push rod 81. The two ends of the elastic rods 82 are fixedly connected between the right clamping block 4 and the support 83. The elastic rods 82 provide a certain tension to keep the right clamping block 4 able to fit against the push plate 811 to the right. During operation, the user can overcome the tension of the elastic rods 82 and push the right clamping block 4 to the left so that the right clamping block 4 can initially press the casting 9 and position the casting 9.

[0030] Working principle: Based on the placement of casting 9, slide and adjust the left clamping block 3, and then position the left clamping block 3 by fastening bolt 72; Select the matching top block 6 and install the top block 6 onto the left clamping block 3 and the right clamping block 4; Place the casting 9, with the two contact points on the left side of the casting 9 fitting into the two top blocks 6 on the left side; overcome the tension of the elastic rod 82 and push the right clamping block 4 to the left, so that the top block 6 on the right side fits into the two contact points on the right side of the casting 9, thus completing the initial positioning of the casting 9; Release the right clamp 4, and under the pulling force of the elastic rod 82, the right clamp 4 moves to the right and fits against the push plate 811 of the electric push rod 81; Start the electric push rod 81. The electric push rod 81 pushes the right clamping block 4 to move to the left. The two top blocks 6 on the right side gradually press the two contact points on the right side of the casting 9. The clamping force is controlled by the electric push rod 81. The test indenter 2 gradually presses down on the casting 9 to complete the hardness test on the casting 9.

[0031] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A casting hardness testing machine, characterized in that, comprising: a carrier table, configured to support a casting; a test indenter, arranged to be movable up and down relative to the carrier table, and configured to press down the casting placed on the carrier table; a left clamping block and a right clamping block arranged separately, respectively slidably mounted on the carrier table, and configured to clamp two sides of the casting placed on the carrier table; wherein, the left clamping block and the right clamping block are each provided with two clamping ends, the clamping ends are snap-fitted with top blocks, and each top block has a clamping surface adapted to the clamped position of the casting.

2. The casting hardness testing machine according to claim 1, characterized in that: A T-shaped sliding groove is formed on the carrier table, the left clamping block and the right clamping block are attached to the upper side surface of the carrier table, sliding blocks are fixed to the lower side surfaces of the left clamping block and the right clamping block, and the sliding blocks are slidably mounted in the T-shaped sliding groove.

3. The casting hardness testing machine according to claim 2, characterized in that: The sliding block is in a shape of a Chinese character "ji", and two side edges of the sliding block are reversely buckled in the T-shaped sliding groove.

4. The casting hardness testing machine according to claim 2, characterized in that: A fixing assembly for fixing the left clamping block on the carrier table is fixed on the left side of the left clamping block; The fixing assembly comprises: a connecting block, fixed on the left side of the left clamping block; a vertical through hole is formed on the connecting block; a fastening bolt, arranged to pass through the through hole on the connecting block; the head of the fastening bolt abuts tightly in the T-shaped sliding groove.

5. A casting hardness testing machine according to claim 4, characterized in that: A limiting sliding groove is formed at the bottom of the T-shaped sliding groove, the head of the fastening bolt is located in the limiting sliding groove, and the limiting sliding groove is configured to restrict the head of the fastening bolt from rotating.

6. A casting hardness testing machine according to claim 4, characterized in that: A wear-resistant block is sleeved on the fastening bolt, and the wear-resistant block is tightly pressed between the head of the fastening bolt and the T-shaped sliding groove.

7. A casting hardness testing machine according to claim 1, characterized in that: A pushing assembly for pushing the right clamping block is fixed on the right side of the right clamping block; The pushing assembly comprises: a support, fixed on the carrier table; an electric push rod, fixed on the support, and configured to push the right clamping block.

8. A casting hardness testing machine according to claim 7, characterized in that: A pair of elastic rods respectively arranged on two sides of the electric push rod are further fixed on the support, and the other ends of the elastic rods are fixedly connected to the right side of the right clamping block; A push plate opposite to the right clamping block is fixed at the movable end of the electric push rod.

9. A casting hardness testing machine according to claim 2, characterized in that: The left clamping block and the right clamping block are symmetric in structure; The left clamping block comprises a main body located in the middle and perpendicular to the T-shaped sliding groove, and the two clamping ends located at two ends of the main body and inclined towards the right side.

10. A casting hardness testing machine according to claim 9, characterized in that: A clamping opening larger than a semicircle and vertically penetrating through the clamping end is formed on the inclined surface of the clamping end of the left clamping block; The top block is attached to the inclined surface of the clamping end, and a clamping head adapted to the clamping opening is fixed on the top block.

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