Manufacturing process of jaw of pincer type wrench
By providing sand holes on both side walls of the pliers wrench and concave surfaces on the rear end of the wrench port surface, the problems of unevenness of the inner wall of the wrench guide surface and groove cavity and incomplete core removal are solved, and the flatness and clamping force of the wrench port are improved.
Patent Information
- Application Number
- CN202411724746.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-03-21
AI Technical Summary
When the wrench of the clamp wrench is formed in one cast, the inner walls of the guide rail surface and the groove cavity are prone to protrude and uneven, resulting in unsmooth sliding, and it is difficult to achieve the last end of the core pulling process, resulting in insufficient clamping force and unable to effectively clamp the workpiece.
There are sand holes at the two side walls of the wrench body on the upper side of the guide rail so that the pick sand pick powder and mule sand can enter the inside of the groove cavity to ensure that the shell is tight and has no gaps. There is a concave surface at the rear end of the wrench mouth surface close to the groove cavity, and only the core removal treatment is required at the front end to ensure clamping force.
Through the design of sand holes, the smoothness of the guide rail surface and the inner wall of the groove cavity is achieved, smooth sliding, and cost is reduced; through the concave design, the clamping force of the wrench mouth surface is improved, and the workpiece can be better clamped.
Smart Images
Figure CN119657837A_ABST
Abstract
Description
Technical field:
[0001] The invention relates to the technical field of manual hardware tools, in particular to a manufacturing process of a pliers-type spanner wrench. Background technology:
[0002] At present, the jaws of the pliers wrench are slidably mounted on a fixed pliers body, a slide groove is provided on the fixed pliers body, and a guide rail is provided on the side wall of the inner cavity of the jaws. In traditional casting, since the jaw surface is solid and the inner mold has grooves and guide rail surfaces, when the wax mold is made into a shell, it is generally necessary to go through two processes of dipping sand and powder into slurry and dipping sand, and the mesh counts of sand and powder are getting larger and larger. When the shell is dipped to the end, the two sides of the jaw groove are blocked first, resulting in loose sand and gaps in the middle of the groove. When the shell is dewaxed for roasting and pouring, the shell sinks to the loose sand in the middle under the action of the gravity of the molten iron. The guide rail surface and the inner walls on both sides of the groove cavity are prone to protrusion and unevenness. Therefore, it cannot slide smoothly in the solid-matched slide groove and cannot be used. Moreover, the cost of using fine sand is relatively high. At present, the general process is to use 1-2 layers of pick sand and pick powder, 3-5 layers of mullite sand, and the mesh number of pick sand and pick powder is 400 mesh. In order to make the guide rail flat, even if it is changed to 3 layers of pick sand and pick powder, 2-4 layers of mullite sand, and the mesh number of mullite sand and mullite powder is 100-200 mesh, the effect is still not ideal, and there are many waste products. In addition, in order to ensure the flatness of the mouth surface of the spanner, the mouth surface of the spanner needs to be cored out. Since the groove where the guide rail is located also needs to be cored out, the two cores are prone to interfere with each other, resulting in the cored out of the mouth surface of the spanner cannot be done to the end. Therefore, the back end of the mouth surface of the spanner is often higher than the front end, and the force is not enough when clamping the workpiece, and the workpiece cannot be clamped. There is no good way to solve the above problems.
[0003] In summary, the above-mentioned problems with the opening of pliers wrenches have become a technical problem that urgently needs to be solved in the industry. Summary of the invention:
[0004] In order to make up for the deficiencies of the prior art, the present invention provides a manufacturing process for the jaws of a pliers wrench, which solves the problem that the guide surface and the inner walls on both sides of the groove cavity are easily protruding and uneven when the jaws are cast as a whole, and solves the problem that the jaws cannot be cored out to the rear end, resulting in the rear end being higher than the front end and the workpiece being unable to be clamped.
[0005] The technical solution adopted by the present invention to solve the above technical problems is:
[0006] A manufacturing process for a pliers spanner spanner, comprising a spanner body, a groove cavity being provided on one side of the spanner body, guide rails being provided on the inner walls on both sides of the groove cavity, and a spanner mouth surface being provided on the other side of the spanner body. When a wax mold is used to make a shell, sand holes are provided on the two side walls of the spanner body at positions above the guide rails, so that pick sand, pick powder and mullite sand can enter the groove cavity of the spanner body through the sand holes, so that the mold shell is tight and has no gaps, and the cast guide rail surfaces and the inner walls on both sides of the groove cavity are smooth and accurate. When the spanner mouth surface is subjected to core pulling treatment, a concave surface is provided at the rear end of the spanner mouth surface close to the groove cavity, so that only the front end of the spanner mouth surface needs to be subjected to core pulling treatment, and the front end of the spanner mouth surface is slightly higher than the rear end concave surface, so that it is convenient to apply force when clamping the workpiece, so as to better clamp the workpiece.
[0007] The sand hole connects the groove cavity with the outside.
[0008] The sand-passing holes are located in the middle of the two side walls of the wrench body.
[0009] The shapes of the sand holes include triangle, polygon, circle and irregular shapes.
[0010] The sand holes on the two side walls of the wrench body are aligned.
[0011] Observation holes are respectively arranged on the two side walls of the spanner body at the lower side of the guide rail.
[0012] The shapes of the observation holes include triangle, polygon, circle and irregular shapes.
[0013] The present invention adopts the above scheme and has the following beneficial effects:
[0014] By providing sand holes on both side walls of the spanner body at the upper side of the guide rail, when the wax mold is used to make the shell, the sand, powder and mullite sand can enter the groove cavity of the spanner body through the sand holes, making the mold shell compact and gapless. The cast spanner guide surface and the inner walls on both sides of the groove cavity are flat and high in precision. The guide rail slides smoothly when it cooperates with the slide groove on the fixed clamp body, and the requirements for the number of layers and mesh of the sand, powder and mullite sand are low, which can reduce costs. By providing a concave surface at the rear end of the spanner mouth surface close to the groove cavity, the front end of the spanner mouth surface is slightly higher than the rear end, which is convenient for applying force when clamping the workpiece and can better clamp the workpiece. Description of the drawings:
[0015] Figure 1 It is a structural schematic diagram of the present invention.
[0016] In the figure, 1, the spanner body, 2, the groove cavity, 3, the guide rail, 4, the sand hole, 5, the spanner mouth surface, 6, the concave surface, 7, the observation hole. Specific implementation method:
[0017] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.
[0018] like Figure 1 As shown, a manufacturing process for the spanner of a pliers-type spanner comprises a spanner body 1, a groove cavity 2 is provided on one side of the spanner body 1, guide rails 3 are respectively provided on the inner walls on both sides of the groove cavity 2, and a spanner mouth surface 5 is provided on the other side of the spanner body 1. When the wax mold is made into a shell, sand holes 4 are respectively provided on the two side walls of the spanner body 1 at the upper side of the guide rails 3, so that pick sand, pick powder and mullite sand can enter the groove cavity 2 of the spanner body 1 through the sand holes 4, so that the mold shell is tight and has no gaps, and the cast guide rail surface and the inner walls on both sides of the groove cavity 2 are smooth and accurate; when the spanner mouth surface 5 is cored out, a concave surface 6 is provided at the rear end of the spanner mouth surface 5 close to the groove cavity 2, and only the front end of the spanner mouth surface 5 needs to be cored out, and the front end of the spanner mouth surface 5 is slightly higher than the rear end concave surface 6, which is convenient for applying force when clamping the workpiece, so as to better clamp the workpiece.
[0019] The sand hole 4 connects the groove cavity 2 with the outside.
[0020] The sand-passing holes 4 are located in the middle of the two side walls of the spanner body 1. The guide rails 3 need to be kept intact, and considering the strength of the spanner body 1, the sand-passing holes 4 cannot be too close to the edge.
[0021] The shapes of the sand holes 4 include triangle, polygon, circle and irregular shapes, and can be arbitrarily designed according to requirements.
[0022] The sand holes 4 on the two side walls of the wrench body 1 are aligned.
[0023] Observation holes 7 are respectively provided on the two side walls of the spanner body 1 at the lower side of the guide rail 3. After the spanner is opened, scales can be seen through the observation holes 7, so as to quickly adjust the required opening amount.
[0024] The shape of the observation hole 7 includes triangle, polygon, circle and irregular shape, and can be arbitrarily designed according to needs.
[0025] Working principle:
[0026] When the wax mold is used to make the shell, the sand, powder and mullite sand can enter the groove 2 of the spanner body 1 through the sand hole 4, making the shell compact and gapless. The cast spanner guide surface and the inner walls of the groove 2 on both sides are flat and high in precision. The guide 3 slides smoothly when it cooperates with the slide groove on the fixed clamp body. In addition, the number of layers and meshes of the sand, powder and mullite sand are low, which can reduce costs. When the spanner mouth surface 5 is cored out, since the rear end of the spanner mouth surface 5 is close to the groove 2, the concave surface 6 is provided, so only the front end of the spanner mouth surface 5 needs to be cored out. The front end of the spanner mouth surface 5 is slightly higher than the rear end concave surface 6, which is convenient for clamping the workpiece and can better clamp the workpiece.
[0027] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.
[0028] The matters not described in detail in the present invention are all known technologies to those skilled in the art.
Claims
1. A manufacturing process for a pliers wrench spanner, comprising a spanner body, a groove cavity is provided on one side of the spanner body, guide rails are provided on the inner walls of both sides of the groove cavity, and a spanner mouth surface is provided on the other side of the spanner body, characterized in that: When making the shell from the wax mold, sand holes are respectively provided on the two side walls of the spanner body at the upper side of the guide rail, and pick sand, pick powder and mullite sand can enter the groove cavity of the spanner body through the sand holes, so that the mold shell is tight and without gaps, and the cast guide rail surface and the inner walls on both sides of the groove cavity are smooth and precise; when the spanner mouth surface is cored out, a concave surface is provided at the rear end of the spanner mouth surface close to the groove cavity, and only the front end of the spanner mouth needs to be cored out. The front end of the spanner mouth is slightly higher than the rear end concave surface, which makes it easier to apply force when clamping the workpiece, so as to better clamp the workpiece.
2. A manufacturing process for a pliers wrench according to claim 1, characterized in that: The sand hole connects the groove cavity with the outside.
3. The manufacturing process of the pliers wrench jaw according to claim 1, characterized in that: The sand-passing holes are located in the middle of the two side walls of the wrench body.
4. The manufacturing process of the pliers wrench jaw according to claim 1, characterized in that: The shapes of the sand holes include triangle, polygon, circle and irregular shapes.
5. The manufacturing process of the pliers wrench jaw according to claim 1, characterized in that: The sand holes on the two side walls of the wrench body are aligned.
6. The manufacturing process of the pliers wrench jaw according to claim 1, characterized in that: Observation holes are respectively arranged on the two side walls of the spanner body at the lower side of the guide rail.
7. A manufacturing process for a pliers wrench spanner according to claim 6, characterized in that: The shapes of the observation holes include triangle, polygon, circle and irregular shapes.